Each second rivet hole has an inner periphery constituted by a cylindrical shear surface having a constant inner diameter that does not axially change; and a tapered fracture surface gradually radially expanding from the shear surface toward an abutment surface.
F16C 33/42 - Ball cages made from wire or sheet-metal strips
B21D 53/12 - Making other particular articles parts of bearingsMaking other particular articles sleevesMaking other particular articles valve seats or the like cages for bearings
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
Provided is a cage for a deep groove ball bearing, the cage being hard to be broken even under a high-speed rotating environment of an electric vehicle speed reducer and a motor that are used in an environment where a dmn value is 850,000 or more, as in an electric vehicle. The deep groove ball bearing includes the resin cage containing, as a reinforcement material, glass fibers, carbon fibers, or both. The reinforcement material has a number-average fiber length of 100 to 600 μm and a number-average fiber diameter of φ4 to φ18 μm.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
In a tripod type constant velocity universal joint of a double roller type, a projection 40 is provided in regions including both end portions in a direction orthogonal to a joint axial line O on a shaft end side with respect to an inner ring 12 on an outer peripheral surface of a leg shaft 32 of a tripod member 3. A ratio T/ag1 between a dimension T in a direction of the joint axial line O of the projection 40 and a major diameter ag1 of a contact portion with the inner ring on the outer peripheral surface of the leg shaft 32 is 0.3 or more.
F16D 3/205 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
This retainer-equipped roller comprises a plurality of rollers and a retainer (2) for holding the rollers. The retainer (2) comprises: a pair of ring members (4) that face either end of each roller in the axial direction; and a plurality of column parts (5) that are installed so as to span across the outer diameter parts of the pair of ring members (4) and that are provided at regular intervals in the circumferential direction such that the rollers can enter. The inner diameter part of each ring member (4) is provided with a roller holding claw (6) which prevents the roller from slipping out to the inner diameter side of the retainer. A retainer radial direction chamfer length (B) satisfies the following relationship with respect to the retainer wall thickness (A). 0 < B/A ≤ 1.6
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
The purpose of this invention is to suppress occurrence of stick slip at a contact part between a hub wheel and a constant-velocity universal joint while maintaining strength of a caulking part in a wheel bearing device. A wheel bearing device 1 includes: an outer member (outer ring 2) having an outer raceway groove 2c·2d; an inner member which comprises a hub ring 3 and an inner ring 4 provided in a small-diameter step part 3a of the hub ring 3, in which a caulking part 3h is formed at an inner-side end part of the small-diameter step part 3a to integrate the hub ring 3 and the inner ring 4, and which has an inner raceway groove 3c·4a; rolling elements (balls 7) accommodated between the outer raceway groove 2c·2d and the inner raceway groove 3c·4a; and a constant-velocity universal joint 20 connected to the hub ring 3. The hub ring 3 has a flat part 3i abutting on an outer-side end surface of a shoulder part 23 of the constant-velocity universal joint 20, the flat part 3i protrudes from an inner-side end part of the caulking part 3h to the inner side, and the outer diameter of the flat part 3i is positioned radially inside of the inner diameter of the inner ring 4.
B60B 35/14 - Torque-transmitting axles composite or split, e.g. half-axlesCouplings between axle parts or sections
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
The purpose of the present invention is to ensure the suppression of the axial movement of a slinger and sealability without the need for an additional processing step, to maintain bearing performance over a long period of time. Provided is a wheel bearing device comprising: an internal member which is provided with an outer ring 2 that has, on the inner circumference thereof, double-row outer raceway surfaces 2a, 2a, a hub ring 3 that has, on the outer circumference thereof, one inner raceway surface 3d opposite to the outer raceway surface 2a and a wheel attachment flange 3b, and an inner ring 4 that is connected to the hub ring 3 and that has, on the outer circumference thereof, another inner raceway surface 4a opposite to the outer raceway surface 2a; double-row rolling elements 5 which are housed between both raceway surfaces so as to be able to roll; and an inner side seal member 6 and an outer side seal member 7 which provide sealing between the outer ring 2 and the hub ring 3 and the inner ring 4, wherein the outer side seal member 7 has an annular slinger 17 that is engaged with the hub ring 3, and the slinger 17 is provided with a protrusion 17e which is formed of an elastic member.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
A wheel bearing device capable of improving indentation resistance at the outer side of an outer member by reducing a quenching crack and deterioration in crystal grain size as much as possible. The outer member (outer ring (2)) is to have an inner-side induction-hardened part (9a) formed by means of induction hardening along an inner-side outer raceway surface (2g) and an outer-side induction-hardened part (9b) formed by means of induction hardening along an outer-side outer raceway surface (2h), wherein the outer-side induction-hardened part (9b) has a deeper hardened layer depth (D) than the hardened layer depth E of the inner-side induction-hardened part (9a), and the inner-side induction-hardened part (9a) and the outer-side induction-hardened part (9b) are separated from each other.
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
Provided is a rolling bearing that comprises a cage and is capable of stabilizing the behavior of the cage, reducing wear, and the like. The cage (6) of the rolling bearing has two annular bodies (10, 10) overlapping each other in the axial direction. Each annular body (10) has a plurality of pocket wall portions (13) arranged at regular intervals in the circumferential direction and each constituting the inner wall surface of a pocket, and a plurality of connecting plate portions (14) connecting the pocket wall portions (13) adjacent in the circumferential direction. The two annular bodies (10, 10) are overlapped and joined to each other at the connecting plate portions (14). Each pocket (12) comprises, at both ends thereof in the circumferential direction, contact portions (P) which come into contact with a ball at a plurality of points so as to be separated from the ball in the cage axial direction (C1).
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 33/66 - Special parts or details in view of lubrication
A clutch unit 10 includes an input-side clutch part 11 for controlling transmission and cutoff of inputted rotational torque, and an output-side clutch part 12 for transmitting rotational torque inputted from the input-side clutch part 11 to an output side and cutting off rotational torque reversely inputted from the output side. The output-side clutch part 12 includes a stationary member 23 of which rotation is restrained, an output member 22 for outputting rotational torque, a plurality of engagement elements 27 arranged in a wedge gap between the stationary member 23 and the output member 22, an elastic member for urging the engagement elements to a narrow side of the wedge gap, and grease filled between the stationary member 23 and the output member 22. The grease contains a calcium sulfonate thickener.
F16D 41/10 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
B60N 2/16 - Seats specially adapted for vehiclesArrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
C10M 135/10 - Sulfonic acids or derivatives thereof
F16D 41/06 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
The structural body unit (UN) comprises a plurality of structural bodies (2) that are configured to be movable and that include a top wall (2a), a bottom wall (2b), and a peripheral wall (2c), wherein a space (SP) is provided inside each structural unit (2). The structural body unit (UN) further comprises a joint housing (20) that is disposed between two of the structural bodies (2) to connect the two structural bodies (2) together. The joint housing (20) includes: a housing main body (22) having a shape in a plannar view that is a square matching short sides of the structural bodies (2); and an opening portion (24) that are formed in a peripheral wall (22c) of the housing main body (22) with a prescribed size. The structural body unit (UN) is configured such that a person can move among the spaces (SP) of the adjacent structural bodies (2) via the opening portions (24).
E04B 1/348 - Structures composed of units comprising at least considerable parts of two sides of a room, e.g. box-like or cell-like units closed or in skeleton form
E04B 1/343 - Structures characterised by movable, separable, or collapsible parts, e.g. for transport
E04H 1/12 - Small buildings or other erections for limited occupation, erected in the open air or arranged in buildings, e.g. kiosks, waiting shelters for bus stops or for filling stations, roofs for railway platforms, watchmen's huts or dressing cubicles
Provided are a cage for a rolling bearing capable of satisfying different required characteristics while securing cage strength, and a rolling bearing using the cage. A cage 5 holds a plurality of balls 4 in a rolling bearing 1, is guided by an outer ring 3, and includes: cage bodies 8 and 11 having an annular shape and including a pocket hole for accommodating each of the balls 4; a resin portion 9 formed at least in a portion on which each of the balls 4 slides in an inner surface of the pocket hole of the cage body 8; and a resin portion 12 having a composition different from that of the resin portion 9 and formed in a guide portion of the cage body 11 sliding on the outer ring 3.
A mobile hydrogen supply system includes a natural energy power generation device that generates electric power from natural energy, and a hydrogen generation device that generates hydrogen. The hydrogen generation device is operable on electric power generated by the natural energy power generation device, and the natural energy power generation device and the hydrogen generation device are transportable.
Provided is a solid-lubricant-filled shell-type needle roller bearing comprising a shell-type outer raceway (1), a plurality of needle rollers (2), and a solid lubricant (3), the plurality of needle rollers (2) being held by the solid lubricant (3). A curved recess (10) that has a concave cross section recessed in the axial direction is formed in a side surface of a second flange part (6) on the side thereof filled with the solid lubricant (3).
This solid lubricant-filled shell-type needle roller bearing has a shell-type outer ring (2), a plurality of needle rollers (3), and a solid lubricant (4), the plurality of needle rollers (3) being held by the solid lubricant (4). A plate thickness removal part (8) is provided over the entire circumference between the axial inner surface of a first flange part (6) and the radial inner end surface, and a first protruding solidification part (4f) extending outward in the axial direction toward the plate thickness removal part (8) is formed on the entire circumference of a first annular solidification part (4a) of the solid lubricant (4) formed between the first flange part (6) and an end surface (3a) of the needle rollers (3).
Gel Sheet Chip, Method For Manufacturing Gel Sheet Chip, Sample Collecting Method, Gel Plate, Sample Collecting Set, Culture Implement, and Method For Manufacturing Culture Implement
A gel sheet chip includes a film, a frame, gel, and a sample to be collected. The frame is placed on the film and a through-hole is formed in the frame. The gel is disposed on the film in the through-hole. The sample to be collected is supported by the gel.
Provided are a grease composition and a grease-filled bearing that prevent electrolytic corrosion and have excellent noise reduction and wear resistance. A rolling bearing 1 is a grease-filled bearing in which a plurality of balls 4 are held between raceway surfaces 2a, 3a of an inner ring 2 and an outer ring 3, and in which a grease composition 7 is filled between the raceway surfaces 2a, 3a. The grease composition 7 includes a base oil, a thickening agent, a metal powder having a melting point of 800℃ or higher, and an ionic liquid. In particular, the metal powder is a copper powder, and the ionic liquid includes the elements phosphorus (P) and sulfur (S).
C10M 141/10 - Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups , each of these compounds being essential at least one of them being an organic phosphorus-containing compound
C10M 137/14 - Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having a phosphorus-to-carbon bond containing sulfur
C10N 30/00 - Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
C10N 30/06 - OilinessFilm-strengthAnti-wearResistance to extreme pressure
C10N 30/12 - Inhibition of corrosion, e.g. anti-rust agents, anti-corrosives
In order to make an operation to press-fit a holder (21) of a sensor unit (20) into a fixed ring (11) of a rolling bearing (10) easier and to suppress deformations of the holder (21) and the fixed ring (11), several samples are extracted from holders (21) constituting one processed lot when press-forming the holders (21). The sizes in the radial direction of press-fit surfaces (25) of the samples are measured, and a representative size of the holders (21) is set for each lot on the basis of the measurement result. Then, a reference size and a dimensional tolerance of the size in the radial direction of a notch part (16) of the fixed ring (11) are set so that the tightening allowance between the notch part (16) and the press-fit surface (25) falls within a range which has been set in advance with respect to the representative size. Subsequently, notch parts (16) for one lot are processed.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
To provide: a silicon nitride sintered body having excellent mechanical property and imparting superior lifetime to a product into which the silicon nitride sintered body is processed; a machine part using the silicon nitride sintered body; and a bearing. The silicon nitride sintered body: has the crystallinity of 75-90% calculated by the following formula based on an XRD diffraction pattern on a mirror-polished cutting face of the silicon nitride sintered body; contains one element or more of Y, Ce, Nd and Eu in an amorphous phase; and does not have an inclusion having a diameter of more than 50 μm and a pore having a diameter of more than 50 μm in a surface layer portion.
To provide: a silicon nitride sintered body having excellent mechanical property and imparting superior lifetime to a product into which the silicon nitride sintered body is processed; a machine part using the silicon nitride sintered body; and a bearing. The silicon nitride sintered body: has the crystallinity of 75-90% calculated by the following formula based on an XRD diffraction pattern on a mirror-polished cutting face of the silicon nitride sintered body; contains one element or more of Y, Ce, Nd and Eu in an amorphous phase; and does not have an inclusion having a diameter of more than 50 μm and a pore having a diameter of more than 50 μm in a surface layer portion.
Crystallinity (%)=Crystalline peak area/(Crystalline peak area+Amorphous peak area)×100
A bearing device for a vehicle wheel suppresses shaking of a vehicle wheel mounting flange by defining dimensional relationships of the various components of the vehicle wheel mounting flange. A vehicle wheel mounting flange (3b) includes a plurality of screw holes (31) into which wheel bolts are screwed, and a rib (35) provided on an inner side circumferential edge of the screw holes (31). When A represents a nominal diameter of the screw hole (31), B represents a width direction dimension of the rib (35) in a cross-section that passes through the center of the screw hole (31) and that is tangent to the pitch circle of the screw hole (31), and C represents a thickness direction dimension of the vehicle wheel mounting flange (3b) that passes through the rib (35), B/A≥1.7 and C/A≥0.8 are satisfied.
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
This bearing device has a rolling bearing (10) provided with a sensor (22) and a wireless communication means (23) of a sensor unit (20). In order to improve the dust-proofness and watertightness of the communication means (23) while suppressing deterioration in communication performance and ease of assembly, the communication means (23) is equipped with a circuit board (25) having a wireless communication circuit (26) mounted thereon and an external antenna (28) connected to the circuit board (25) through a cable (27), the circuit board (25) and the communication circuit (26) are covered with a coating film (CT), the external antenna (28) is not covered with the coating film (CT), and a space is provided between the external antenna (28) and a resin cover (24) covering the communication means (23).
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
A ball screw device 4 includes a screw shaft 9 having a screw groove 9a formed in an outer peripheral surface, a nut 8 having a screw groove 8a formed in an inner peripheral surface, and a large number of balls 10 arranged between the screw groove 9a of the screw shaft 9 and the screw groove 8a of the nut 8. A ratio Δr/L1 of a radial gap Δr, which is a maximum amount of radial movement of the nut 8 with respect to the screw shaft 9, to an axial span L1 between the large number of balls 10 is made larger than 1/2000.
Provided is a ball screw comprising a circulation member 5 that is mounted in a fitting hole 6 disposed in a nut 3, and that causes a rolling ball to circulate. The circulation member 5 includes engagement parts 12 which, in a state where the circulation member is mounted in the fitting hole 6, engage with the fitting hole 6 by being bent. When viewed from the radially outer side of the nut 3, the engagement parts 12 engage with the fitting hole 6 in a state of being bent in an arc shape around the center P of the fitting hole 6.
A large number of fine protrusions (23) are formed on the outer side surface of a seal member (5) so as to form a water-repellent surface having a contact angle (θ) of water of 90° or more.
This ball screw includes a circulation member 5 which is attached to a fitting hole 6 provided in a nut 3 and which circulates a rolling ball. A pair of gaps 15 for inserting a jig 20 for positioning the circulation member 5 with respect to the fitting hole 6 are provided between the fitting hole 6 and the circulation member 5. The pair of gaps 15 are positioned respectively on one side and the other side in the extension direction of a screw shaft.
A charging station (1) is provided with: power generation equipment (5) having at least one of a solar power generation device and a wind power generation device; a storage battery (6) for storing the power generated by the power generation equipment (5); a control device (7) for performing control of inputting the power generated by the power generation equipment (5) into the storage battery (6), and of outputting the power of the storage battery (6) to a charging device (8); and a housing (2) for accommodating the storage battery (6) and the control device (7). An opening/closing section (12) is provided on the housing (2), the charging device (8) is provided within the opening/closing section (12) or inside the housing (2), and an uncrewed aircraft (10) having landed on the charging device (8) is accommodated inside the housing (2) due to closing of the opening/closing section (12).
B64U 80/25 - Transport or storage specially adapted for UAVs with arrangements for servicing the UAV for recharging batteriesTransport or storage specially adapted for UAVs with arrangements for servicing the UAV for refuelling
B64U 10/14 - Flying platforms with four distinct rotor axes, e.g. quadcopters
E04H 6/44 - Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages for storing aircraft
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/35 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
Provided are an angular ball bearing and a rotation mechanism with which ball wear can be suppressed even when the balls slide against each other, and cost can be reduced. An angular ball bearing (1) is an angular ball bearing having no retainer and comprising an inner ring (2), an outer ring (3), and a plurality of balls (4) interposed between the inner ring (2) and the outer ring (3). The surface roughness of the balls (4) is 0.06 μmRa or less, and the kinematic viscosity (40°C) of a lubricant is 46-220 cst. When the lubricant is grease, the consistency of the grease ranges from No. 1 to No. 00. The surface roughness of the balls (4) is more preferably 0.04 μmRa or less, and the kinematic viscosity (40°C) of the lubricant is more preferably 68-150.
F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
This motor unit 1 comprises: an electric motor 2; a substrate 3 provided with a control unit C for the electric motor 2; a metal housing 5 accommodating the electric motor 2 and the substrate 3; and a bus bar holder 42 insulating and holding a plurality of bus bars 41 between the substrate 3 and the electric motor 2 in an axial direction. A terminal 41a provided at one end of each bus bar 41 is inserted into a corresponding terminal insertion hole 31 provided on the substrate 3 to electrically connect a coil 26 of a stator 23 and the control unit C. The housing 5 is arranged between the bus bar holder 42 and the substrate 3 in the axial direction, and has a motor cover 54 for sealing one end opening of a motor housing part 51 accommodating the electric motor 2. The terminal 41a and the substrate 3 are positioned by the motor cover 54.
This energization unit (1) is configured by including: a conductive annular case body (2) that is fitted into a housing (6); a conductive energization member (3) that protrudes radially inward from the case body (2) and is in sliding contact with a motor shaft (5); and an elastic member (4) that urges the energization member (3) toward the motor shaft (5). Alternatively, this energization unit is configured by including: a case body (2); a conductive energization member (3) that protrudes radially inward from the case body (2) and is in sliding contact with a motor shaft (5); a radial-direction elastic member (16) that urges the energization member (3) radially inward; and a pressing mechanism (17) that presses the energization member (3) from one side in the axial direction toward the other side. A bearing unit (A) has the energization unit (1) and a bearing (7).
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 35/06 - Mounting of ball or roller bearingsFixing them onto shaft or in housing
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
A hand (6) according to the present invention comprises a pair of claw parts (46) that move in the opening/closing direction to grip or release a workpiece (W), and a grip part (38) for moving the claw parts (46) in the opening/closing direction. The claw parts (46) are supported by the grip part (38) at base end portions thereof so as to be movable in the opening/closing direction, extend in the longitudinal direction from the grip part (38), and have gripping surfaces (52) for gripping the workpiece (W) at tip end portions thereof. The gripping surfaces (52) each have a first inclined surface (54) and a second inclined surface (56), and a tip end-side angle (α) is set to be smaller than a base end-side angle (β).
This insulated rolling bearing unit includes a rolling bearing (1) and an insulated washer (2). An outer race (3) has an outer race width surface (9), an outer circumference cylindrical surface (10), and an outer race chamfered section (11). The outer circumference cylindrical surface (10) is coated with an insulative film (12). The insulated washer (2) has an annular protrusion (14).
F16C 35/077 - Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
This bearing device has a magnetic ring attached to a rotary member, and has a sensor unit which is attached to a counterpart member and provided with a sensor, a wireless communication circuit, a power supply circuit, and a stator, resulting in the stator and the magnetic ring to oppose each other in the radial direction. In the bearing device, the space required for arranging the sensor unit and the magnetic ring is reduced by suppressing the size of the sensor unit. In the sensor unit (4), the stator (7) is provided at a finite length in the circumferential direction. The stator (7), the sensor (11), the wireless communication circuit (12), and a power supply circuit (13) are arranged on the same circumference.
F16C 19/04 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
The present invention avoids, during an operation of a ball bearing including a crown-shaped resin retainer, interference between the resin retainer and a bearing ring while suppressing a load on the resin retainer due to lag of progressing balls. When a pocket diameter on a circumferential cut surface of the resin retainer (4) is dc, a pocket diameter on a radial cut surface of the resin retainer (4) is dr, and a diameter of the ball (3) is Da, Da < dr < 1.07 Da ≤ dc is satisfied.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
This rolling bearing comprises an outer member (1) and an inner member (2), a plurality of rolling elements (3) disposed along the circumferential direction in an annular space between an inner diameter surface of the outer member (1) and an outer diameter surface of the inner member (2), a locking portion (11) in the circumferential direction provided on one of the outer member (1) and the inner member (2) and a sliding contact portion (12) in the circumferential direction provided on another outer member (1) and another inner member (2), and a retaining ring (20) that abuts the locking portion (11) and the sliding contact portion (12) and that makes electrical connections between the outer member (1) and the inner member (2), wherein the retaining ring (20) is electrically conductive and elastically deformable, and is a rolling bearing that contacts the sliding contact portion (12) with an interference a in the axial direction.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
34.
SLIDING CONSTANT VELOCITY UNIVERSAL JOINT AND WHEEL DRIVING DEVICE PROVIDED WITH SAME
In a double offset type sliding constant velocity universal joint 1 provided in a power transmission system of a vehicle using an electric motor as a drive source, an axial clearance (pocket clearance) δ1 is formed between a pocket 12 of a holder 5 and a ball 4, and an axial clearance δ2 of 0.6 mm or more is formed between a spherical surface part 15 of an inner peripheral surface of the holder 5 and a spherical outer peripheral surface 8 of an inner joint member 3.
F16D 3/227 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a cylinder co-axial with the respective coupling part the joints being telescopic
35.
INFORMATION PROCESSING DEVICE AND INFORMATION PROCESSING METHOD
A monitoring device (100) creates a report on the basis of a pre-maintenance physical quantity detected by a sensor (S) before first maintenance in response to an anomaly in a wind power generation unit (45), and of a post-maintenance physical quantity detected after the first maintenance by the sensor (S) which has detected the pre-maintenance physical quantity, and outputs the report.
A calculation device (102) identifies the type of a second anomaly. The calculation device determines a maintenance schedule for the second anomaly on the basis of the type of the second anomaly. The communication interface (106) outputs the maintenance schedule.
A roller fall-off prevention tool (1) is applied to a bearing (11) in a form in which a roller (13) falls on an inner diameter side of a cage (12). On the outer periphery of both end portions in an axial direction, a tapered portion (2) is formed, in which an incident angle with respect to the bearing (11) is less than 45°. The outer periphery of an intermediate portion in the axial direction is a straight portion (3) forming a cylindrical surface parallel to the axis. From both end surfaces in the axial direction, four or more slits (4) are alternately formed at equal intervals in a circumferential direction. When the tool is mounted on the bearing (11), the straight portion (3) is brought into contact with the roller (13) by being fitted into the inner side of the inscribed circle of the roller (13) from the small-diameter end of the tapered portion (2). When the tool is removed from the bearing (11), the shaft or the inner ring is abutted against a ridge (5) extending in the axial direction on the inner diameter surface.
F16C 41/04 - Preventing damage to bearings during storage or transport thereof or when otherwise out of use
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
Provided are a sealing device capable of achieving both low torque and high sealing performance by improving grease applied to a seal lip and a mating member thereof, and a rotating component that employs the sealing device. A sealing ring 14 is fixed to a fixed-side member 2 of the rotating component, is in sliding contact with a rotating-side member 15, and has a seal lip in sliding contact with the rotating-side member 15, wherein grease is applied to the sliding contact surface of the seal lip; the grease contains a base oil, a thickener, and an additive, and the apparent viscosity of the grease at a shear rate of 1,000 s-1 at 60°C is 0.22 Pa s or more.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
C10M 107/02 - Hydrocarbon polymersHydrocarbon polymers modified by oxidation
C10M 115/08 - Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
C10M 135/10 - Sulfonic acids or derivatives thereof
C10M 159/24 - Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing sulfonic radicals
C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well defined but for which the chemical nature is either unspecified or only very vaguely indicated
C10M 171/02 - Specified values of viscosity or viscosity index
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
F16J 15/18 - Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
F16J 15/324 - Arrangements for lubrication or cooling of the sealing itself
F16J 15/3232 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
C10N 30/00 - Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
A first mathematical expression is prepared which enables a determination for a rolling bearing (10) comprising an inner ring (11), an outer ring (12), a plurality of rolling elements (13), and a lubricant (LQ). In accordance with a usage condition of the rolling bearing (10), it is determined whether the following first mathematical expression (1): F=f(α,β,γ,δ) satisfies the following second mathematical expression (2): F≤10. In parameter calculation for the lubricant (LQ), the lubricant (LQ) is divided into a first region and a second region. In a virtual electric circuit corresponding to the rolling bearing (10), a characteristic value of a virtual element assessed for the first region and the second region is determined.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
Provided is a power conversion device having a configuration in which a plurality of types of generators are connected, the control of the plurality of types of generators being capable of being switched using a switching control method. The power conversion device performs power conversion of power input from each of the plurality of types of generators and outputs the result toward a load, the power conversion device comprising: a shared power conversion circuit that has the load connected thereto and performs the power conversion, each of the plurality of types of generators being connected to the shared power conversion circuit via a switching unit; and a control unit that controls each of the plurality of types of generators. The control unit switches control programs for controlling the plurality of types of generators, and uses the switched control programs. The switching unit concurrently switches power input from the plurality of types of generators and inputs the switched power to the shared power conversion circuit. The control unit switches the control programs to control programs corresponding to the generators and uses the adapted control programs.
Provided is a rolling bearing fitted with an electroconductive seal in which a seal member (5) is formed of electroconductive rubber, and a seal sliding contact surface (13) with which a seal member (5) is in sliding contact is formed on an inner race (2). The seal sliding contact surface (13) is a surface in which the skewness Rsk and the kurtosis Rku of a roughness curve in a direction orthogonal to the circumferential direction are such that Rsk>0 and Rku<3.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
Provided are a rolling bearing cage and a rolling bearing using the cage, the rolling bearing cage making it possible to: maintain an oil film on a contact surface even with a small amount of lubricant by defining the surface roughness of the cage by means of a plurality of three-dimensional surface roughness parameters; and stably maintain a low friction state even under severe lubrication conditions. The cage 5 is a resin-made cage for the rolling bearing, and has a plurality of pockets 6 that hold rolling elements. A value of A = (Sa/10) + Str + (Spk/10) obtained from an arithmetic average height Sa, an aspect ratio Str of surface properties, and a protruding peak height Spk on the surface 6a of the pockets 6 is equal to or greater than 1.20.
F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
A ball bearing includes a cage circular annular portion and a seal member. The cage circular annular portion has a cage-side sliding contact surface axially opposed to the seal member and configured to come into sliding contact with the seal member. The seal member has a seal-side sliding contact surface configured to come into sliding contact with the cage-side sliding contact surface. A plurality of axial protrusions each having an axially convex circular arc shape in cross sections along a circumferential direction are formed on one of the cage-side sliding contact surface and the seal-side sliding contact surface at constant pitches in the circumferential direction.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
A film (manganese phosphate film 20) that reduces surface roughness to less than that of a base material surface is formed on at least one surface among a cylindrical inner peripheral surface 6 of an outside joint member 2 of a double offset type constant velocity universal joint 1, a surface of a track groove 7 of the outside joint member 2, a spherical outer peripheral surface 8 of an inside joint member 3, a surface of a track groove 9 of the inside joint member 3, a spherical surface section 13 of an outer peripheral surface of a retainer 5, and a spherical surface section 15 of an inner peripheral surface of the retainer 5.
F16D 3/227 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a cylinder co-axial with the respective coupling part the joints being telescopic
The present invention addresses the problem of suppressing movement of a slinger in an axial direction regardless of the resultant axial length of a cylindrical part of the slinger. An outer-side seal member (10) of a wheel bearing device (1) comprises: a slinger (13) that is provided to a base part (3d) of a hub flange (3b) and that has a cylindrical part (13a) which fits into an outer peripheral surface (3j) of a hub ring (3) and a disk part (13b) which faces the hub flange (3b); and a seal member (12) that has a seal lip. The outer peripheral surface (3j) of the hub ring (3) has a fitting part (31) into which the cylindrical part (13a) of the slinger (13) fits. The fitting part (31) has a small-diameter section (311) and a large-diameter section (312) that is positioned farther from the hub flange (3b) than the small-diameter section (311) in the axial direction and that is formed to have a diameter larger than that of the small-diameter section (311).
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
F16J 15/3232 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
F16J 15/3256 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
46.
COLLECTION ARRANGEMENT MEMBER, COLLECTION ARRANGEMENT DEVICE, AND COLLECTION ARRANGEMENT METHOD
The present invention comprises: a collection pin (141) having a hollow shape and capable of cutting and collecting a to-be-processed material; an arrangement pin (142) that contacts, inside the collection pin (141), the to-be-processed material in the collection pin (141), and presses the to-be-processed material to arrange the to-be-processed material outside the collection pin (141); and a fixing holder (143) to which the collection pin (141) is fixed. The to-be-processed material is a gel sheet in which a gel for supporting an object to be collected is formed in a sheet shape.
C12M 1/34 - Measuring or testing with condition measuring or sensing means, e.g. colony counters
G01N 1/04 - Devices for withdrawing samples in the solid state, e.g. by cutting
47.
METHOD FOR ESTIMATING ROLLING VISCOSITY RESISTANCE, SYSTEM FOR ESTIMATING ROLLING VISCOSITY RESISTANCE, PROGRAM FOR ESTIMATING ROLLING VISCOSITY RESISTANCE, AND COMPUTER-READABLE RECORDING MEDIUM IN WHICH SAID PROGRAM IS RECORDED
A rolling bearing 1 comprises raceway surfaces 11a, 12a, and a rolling element 13 that rolls on the raceway surfaces. In the rolling bearing 1, the raceway surfaces and the rolling element are brought into point contact with each other, an oil film is formed at the point contact portion, and the raceway surfaces 11a, 12a are provided with a contact part that comes into contact with the rolling element 13 and a non-contact part that does not come into contact with the rolling element. An estimated value Fr,w of the rolling viscous resistance is calculated from a regression equation in which the scope of calculation in the major-axis direction of a contact ellipse is a length selected within a range that exceeds the major-axis radius of the contact ellipse and does not exceed the equivalent radius in the axial direction.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
Provided is a clutch unit 1 including: an input-side clutch 10 that controls the transmission and blocking of torque which is input through a lever operation; an output-side clutch 20 that, when no lever operation is performed, is set to a locked state that restricts the rotation of an output shaft 2 and blocks reverse input torque which is input to the output shaft 2; and a lock mechanism 30 that restricts the rotation of the output shaft 2 at an axial position different from that of the output-side clutch 20. The lock mechanism 30 restricts the rotation of the output shaft 2 by meshing external teeth 31b of a first lock element 31 that rotates integrally with the output shaft 2 with internal teeth 32a of a second lock element 32 that is restricted from rotating about the axis X of the output shaft 2, and releases the meshing state of the external teeth 31b and the internal teeth 32a when the second gear 32 is moved in the axial direction through a lever operation. The tooth width L2 of the internal teeth 32a of the second lock element 32 is set to be smaller than the tooth width L1 of the external teeth 31b of the first lock element 31.
F16D 41/10 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
F16D 41/08 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
F16D 41/066 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
An electric motor device comprises: a stator (4) that has a stator magnetic body (17) and an excitation coil (3) wound around the stator magnetic body (17); a rotor (6) that has a magnetic pole facing the stator (4) and that is rotatably supported with respect to the stator (4); and a support body (Sp) that supports the stator magnetic body (17). The stator magnetic body (17) is provided with cavities (17b) from the location where the excitation coil (3) is provided to the location where the stator magnetic body is fixed to the support body (Sp). The magnetic pole of the rotor (6) faces the stator (4) in the radial direction of a coordinate system with the rotation axis of the rotor (6) as the axial direction, and the stator magnetic body (17) is fixed to the support body (Sp) at an inner diameter-side end part thereof. The cavities (17b) are provided in the radial positions between an inner diameter-side portion of a fixing part to the excitation coil (3) and a fixing part to the support body (Sp), in the stator magnetic body (17).
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02K 9/00 - Arrangements for cooling or ventilating
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 11/33 - Drive circuits, e.g. power electronics
An outer surface rubber portion is formed to cover the entire axially outer surface of a metal core. An inner surface rubber portion is formed with a circular annular opening through which the axially inner surface of the metal core is exposed on the same circumference passing on the radially outer side of minute protrusions; and circular arc-shaped openings through which the axially inner surface of the metal core is exposed on the same circumference passing on the radially inner side of the minute protrusions.
A rolling component has a surface and is made of steel. The rolling component comprises a surface layer portion that is a region up to 20 m in depth from the surface. The rolling component is intended for use with hydrogen-utilizing equipment. The steel contains 0.70 mass percent or more and 1.10 mass percent or less of carbon, 0.15 mass percent or more and 0.35 mass percent or less of silicon, 0.30 mass percent or more and 0.60 mass percent or less of manganese, 1.30 mass percent or more and 1.60 mass percent or less of chromium, 0.01 mass percent or more and 0.50 mass percent or less of molybdenum, and 0.01 mass percent or more and 0.50 mass percent or less of vanadium, with a balance consisting of iron and unavoidable impurities. In the surface layer portion, the steel has a nitrogen concentration of 0.2 mass percent or more.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
C21D 9/36 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ballsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for rollers
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
A control device controls an attitude control actuator by means of which a distal end member located on a link actuation device can be moved. A parallel linkage mechanism includes a proximal end-side link hub, a distal end-side link hub, and three linkages via which the distal end-side link hub is coupled to the proximal end-side link hub in such a manner that allows the attitude of the distal end-side link hub to change relative to the proximal end-side link hub. The control device includes a parameter switcher which switches control parameters to adjust the jerk of the attitude control actuator or the distal end member based on a load applied to the distal end member. The parameter switcher can switch more than one control parameter including at least one of the filter time constant of a moving average filter or a model following control gain.
A rolling bearing (100) supports a rotating shaft of a drive unit for a vehicle. The rolling bearing comprises an inner ring (10), an outer ring (20), and a rolling element (30) which are made of quenched and tempered steel. The inner ring, the outer ring, and the rolling element respectively have rolling surfaces (10da, 20ca, 30a). The dislocation density of retained austenite in a surface layer of at least one of the rolling surfaces of the inner ring and the outer ring is 2.5 × 1014m-2or more and 1.0 × 1017m-2 or less.
C21D 9/36 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ballsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for rollers
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
Provided is a shaft seal capable of reducing the variation in the inner diameter contraction amount at the time of installation in a housing, while reducing the rotational torque of the shaft seal, thereby suppressing variation in the rotational torque. A shaft seal 5 is an annular shaft seal provided between a rotary shaft 6 and a housing 7, and is provided with an inner diameter lip 2, and an outer diameter lip 1 provided on the outer diameter side of the inner diameter lip 2. In the shaft seal 5 in a free state, when the height of the outer diameter lip 1 is L1 and the height of the inner diameter lip 2 is L2, 0.5 ≤ (L1/L2) ≤ 0.9 is satisfied, and the inclination angle with respect to the axial direction of the outer diameter lip 1 is larger than 5°.
A plunging type constant velocity universal joint has six torque transmission balls, and a curvature center of a spherical outer peripheral surface and a curvature center of a spherical inner peripheral surface of a cage are offset toward opposite sides in an axial direction with respect to a joint center. The plunging type constant velocity universal joint is used at a normal operating angle of from 8° to 12°. A ratio DBALL/DSPCD of a diameter (DBALL) of the torque transmission ball to a spline pitch circle diameter (DSPCD) of a coupling hole of an inner joint member is within a range of 0.80 to 0.86. A contact angle of the torque transmission ball and a linear track groove is within a range of 32° to 35°. A contact ratio of the torque transmission ball and the linear track groove is within a range of 1.05 to 1.08.
F16D 3/226 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a cylinder co-axial with the respective coupling part
F16D 3/223 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
56.
SILICON NITRIDE SINTERED BODY, MACHINE PART, AND BEARING
To provide a silicon nitride sintered body, a machine part and a bearing that have superior mechanical properties and sliding properties. A rolling element 4 is a silicon nitride sintered body including a silicon nitride particle, a rare earth element and an aluminum element. In a range in which the sum of the area of the upper-size crystal grain diameter within a range where the crystal grain diameter of a β-type Si3N4 particle in the silicon nitride sintered body has the crystal orientation of 15-180 degrees, is 30% relative to an area of the total crystal grain diameter, the crystal grain diameter of the β-type Si3N4 particle is 1-4 μm by circle equivalent diameter and/or the aspect ratio of the β-type Si3N4 particle is 3-6.
C04B 35/584 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides based on silicon nitride
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
A casing 10 that accommodates an electric motor 2 and a ball screw 30 as a motion conversion mechanism 3 includes a first case 11 that is made of an aluminum alloy and accommodates the electric motor 2 and a second case 12 that is coupled to the first case 11 in an axial direction in a state of accommodating the ball screw 30. The electric motor 2 is supported by the second case 12 via a metal bracket 8 and a screw 9, and the entire outer surface of at least one of the metal bracket 8 and the second case 12is covered with an insulating film C.
A stator 2 includes: an annular stator core 10 having a plurality of teeth 12; a coil 30 wound around each tooth 12; a crossover wire 31 connecting adjacent coils 30; and a terminal 42 electrically connected to the crossover wire 31. The plurality of the coils 30 and the crossover wire 31 are formed of one coil wire. The crossover wire 31 is provided with a tension relaxation mechanism 51 that is bent in contact with a region other than a contact part P1 with the terminal 42.
A plunging type constant velocity universal joint includes an outer joint member having a plurality of linear track grooves, an inner joint member having a plurality of linear track grooves, a plurality of torque transmission balls, and a cage configured to accommodate the torque transmission balls in pockets. A curvature center of a spherical outer peripheral surface and a curvature center of a spherical inner peripheral surface of the cage are offset toward opposite sides in an axial direction with respect to a joint center. A spherical clearance that allows guide in contact is formed between a spherical outer peripheral surface of the inner joint member and a spherical inner peripheral surface of the cage. A positive axial clearance is formed between the pocket of the cage and the torque transmission ball.
F16D 3/2245 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a sphere where the groove centres are offset from the joint centre
F16D 3/223 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
A feed screw mechanism includes a rotary member having a female screw portion, a linear motion member having a male screw portion screwed to the female screw portion and making a linear motion with rotation of the rotary member, a lubricant between the female and male screw portions, a housing housing the rotary and linear motion members, and a wall portion protruding, in a radial direction, from the outer peripheral surface of the linear motion member. The wall portion moves together with the linear motion member, and an outer radial end portion of the wall portion is disposed: to not contact the inner peripheral surface of the housing and a member provided on the inner peripheral surface of the housing; or to be slidable with respect to the inner peripheral surface of the housing or the member provided on the inner peripheral surface of the housing.
F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
The present invention provides: a retainer for rolling bearings, which has excellent heat resistance, is capable of achieving good moldability even in cases where the retainer is, for example, thick, and has excellent strength; and a rolling bearing which uses this retainer. This retainer 5 is a retainer for rolling bearings, which is formed by injection molding a resin composition and has a plurality of pockets 6 for holding rolling bodies. The resin composition contains the following components (A) to (C). (A) 30-89.9% by mass of a copolymerized polyamide resin which contains, as constituent units, a hexamethylene terephthalamide unit and a hexamethylene adipamide unit (B) 10-50% by mass of glass fibers or carbon fibers (C) 0.1-20% by mass of a plate-shaped filler
C08L 77/06 - Polyamides derived from polyamines and polycarboxylic acids
F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
A rolling component has a surface and is made of steel. The rolling component comprises a surface layer portion that is a region up to 20 μm in depth from the surface. The steel contains 0.70 mass percent or more and 1.10 mass percent or less of carbon, 0.15 mass percent or more and 0.35 mass percent or less of silicon, 0.30 mass percent or more and 0.60 mass percent or less of manganese, 1.30 mass percent or more and 1.60 mass percent or less of chromium, 0.01 mass percent or more and 0.50 mass percent or less of molybdenum, and 0.01 mass percent or more and 0.50 mass percent or less of vanadium, with a balance consisting of iron and unavoidable impurities. In the surface layer portion, the steel has a nitrogen concentration of 0.2 mass percent or more.
A shell type roller bearing includes a shell outer ring that includes a cylindrical portion (12) and a flange (13) extending radially inward from one axial end of the cylindrical portion and that is made of an austenitic stainless steel material. One axial end portion of an inner peripheral surface (16) of the cylindrical portion (12) is a tilted surface (16b), the inner diameter of the tilted surface (16b) is larger than the inner diameter of an axial middle region of the inner peripheral surface (16), and the hardness of the flange (13) is in the range of 300 to 450 HV.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
A grinding apparatus includes: a grinding member driving unit having a motor that rotates a grinding member; a table driving unit that brings the grinding member into contact with a workpiece by moving the grinding member and the workpiece relative to each other; an AE sensor that detects an acoustic emission generated when the grinding member and the workpiece are brought into contact with each other; and a controller that controls a cut-in speed of the grinding member into the workpiece by controlling the table driving unit. The controller controls the cut-in speed using an output of the AE sensor and a motor current of the grinding member driving unit.
B24B 49/00 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
B24B 49/10 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
B24B 51/00 - Arrangements for automatic control of a series of individual steps in grinding a workpiece
A mechanical component includes steel and has a surface. The steel is quenched and tempered. The mechanical component includes a nitrided layer on the surface and a core farther away from the surface than the nitrided layer. A nitrogen concentration in the steel on the surface is greater than or equal to 0.01 mass percent. A hardness of the steel on the surface is greater than or equal to 820 Hv. An amount of residual austenite in the steel in the core is greater than or equal to 0.1 volume percent and less than or equal to 9 volume percent. A dislocation density of the residual austenite in the steel in the core is greater than or equal to 4.0×1014 m−2. The steel is high carbon steel or bearing steel.
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
A wrist joint unit (HU) comprises: an arm (5); a first rotation member (6) that is provided so as to be rotatable about a first rotation axis (C1); a bevel gear (7) that is a second rotation member provided so as to be rotatable about a second rotation axis (C2) orthogonal to the first rotation axis (C1); a first motor (9) that is supported by the arm (5) and that drives the first rotation member (6) to rotate; and a second motor that is supported by the arm (5) and that drives the bevel gear (7) to rotate. The first rotation member (6) is supported in a cantilever manner by the arm (5), and the bevel gear (7) which is the second rotation member is supported in a cantilever manner by the first rotation member (6). An end effector (11) can be fitted to the bevel gear (7).
This rotational load device comprises a slide tube (16) which is fitted around the outer perimeter of a rotary shaft (15) so as to be slidable in the axial direction and an elastic member (17) which biases the slide tube (16) in the axial direction, wherein a cam groove (30), the axial position of which changes along the circumferential direction, is formed in the slide tube (16), and a cam pin (31), which slides inside the cam groove (30) when the rotary shaft (15) rotates, is provided in the outer periphery of the rotary shaft (15).
Provided is a ball bearing which is used at a dmn value of not less than 700,000. The retainer (10) is a crown-shaped retainer including engineering plastic, wherein: the diameter φx of a ball (5), the radius Ry of a radial-direction inner peripheral surface (D) of a pocket (11) in a cross-section that passes through the pocket center (C) and that includes the axial center (O) of the bearing, and the radius Rz of a circumferential-direction inner peripheral surface (E) of the pocket (11) in a cross-section that, at the pocket center (C), is orthogonal to a straight line in the bearing radius direction which passes through the pocket center (C) satisfy φx<2Ry<2Rz; and the center (C2) of a second inner peripheral surface (E2) at the tip end side of the circumferential-direction inner peripheral surface (E) is further eccentric to the base part (12) side in comparison to the center (C1) of a first inner peripheral surface (E1) on the base part (12) side.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
Provided is a ball bearing having a structure in which: a cage is less susceptible to expansion in diameter due to a load of centrifugal force during high-speed rotation; and more lubricating oil is allowed to flow from the back side of the cage toward the inner raceway member. A ball bearing 20 has a cage 24 having: an annular base part 30 positioned on one side in the axial direction of a ball 23; and multiple pairs of retaining claws 32 extending from the annular base part 30 toward the other side in the axial direction. A pocket 31 having a spherical recessed surface is formed in the opposite surfaces of each pair of the retaining claws 32 and in one axial end face of the annular base part 30 in order to house the ball 23 in such a manner as not to fall off in the axial and radial directions. In the ball bearing in which a back surface of the annular base part 30 on one side in the axial direction has an outer diameter corner 30a and an inner diameter corner 30b that are chamfered, the annular base part 30 has a larger chamfered part formed at the outer diameter corner 30a of the back surface than that formed at the inner diameter corner 30b.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 33/66 - Special parts or details in view of lubrication
Provided is a clutch unit which prevents a locking mechanism from switching from an engagement state to an engagement-released state due to torque which is inputted from an output side of a drive shaft. This clutch unit 1 has: an output-side clutch 20 for restricting the torque-induced rotation of a drive shaft 2 around an axis P; an input-side clutch 10 which has an input-side first rotation member 11 to which torque is inputted by an operation lever 40, and an input-side second rotation member 13 for transmitting torque to the drive shaft 2, and is capable of switching between a connection state in which torque is transmitted by the operation lever 40 and a connection-released state in which torque is not transmitted; and a locking mechanism 50 configured so as to be capable of switching between an engagement state in which rotation of the drive shaft 2 is suppressed by the operation lever 40, and an engagement-released state in which rotation is not suppressed. The torque transmission mechanism input-side clutch 10 of the clutch unit 1 is in a connection-released state when positioned at the location at which the operation lever 40 switches the locking mechanism 50 to the engagement state.
F16D 41/10 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
F16D 41/067 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
71.
SILICON NITRIDE SINTERED BODY, MACHINE PART USING SAME, AND BEARING
Provided are: a silicon nitride sintered body having both workability and favorable mechanical characteristics; a machine part using the same; and a bearing. This silicon nitride sintered body has a Vickers hardness of 1,220-1,400 Hv, the maximum diameter of holes in a surface layer part that is a region within 2 mm from the surface of the silicon nitride sintered body is at most 30 μm, the silicon nitride sintered body has a degree of crystallinity of 75-90% and contains a rare-earth element and an aluminum element, the content of the rare-earth element is 6-13 wt%, in terms of oxide, with respect to the total weight of the silicon nitride sintered body, and the content of the aluminum element is 6-13 wt%, in terms of oxide, with respect to the total weight of the silicon nitride sintered body.
C04B 35/591 - Fine ceramics obtained by reaction sintering
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
A vibration measurement device includes an acceleration sensor, an acceleration sensor mounting fixture, a spacer as an insulating member, and a heat shrink tube. The acceleration sensor includes an element. The acceleration sensor mounting fixture is disposed on a side of the acceleration sensor, adjacent to an object under measurement. The spacer is sandwiched between the acceleration sensor and the acceleration sensor mounting fixture so as to be in contact with both the acceleration sensor and the acceleration sensor mounting fixture. The heat shrink tube covers a sensor outer edge and a mounting fixture outer edge. The heat shrink tube includes a region protruding outward of acceleration sensor and the acceleration sensor mounting fixture as viewed from above.
This transmission shaft is used in a transmission and has a raceway surface on which needle rollers roll. The transmission shaft includes a base material and a triiron tetraoxide film. The base material includes any one of chromium steel, chromium-molybdenum steel, or nickel-chromium-molybdenum steel, and has, on a surface thereof, a diffusion layer including crystal grains of at least one of iron carbide, iron nitride, or iron carbonitride. The triiron tetraoxide film is formed on the surface of the base material and is disposed at least on the raceway surface.
A bearing includes a plurality of claws located in a circumferential direction at an end face of an inner ring and protruding from the end face of an inner ring in an axial direction. A lock mechanism can be used to fasten the claws to a shaft. At least one of the plurality of claws has an opening provided therein.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 23/08 - Ball or roller bearings self-adjusting
In a tripod type constant velocity universal joint 1 of a double roller type, a carbon content in a core portion of a tripod member 3 is set to 0.23 to 0.44%, and a hardened layer 16 of a carburized layer is provided on the surface of a leg shaft 32. A first region P having a radius of curvature Ra in a cross section in a direction orthogonal to a joint axial direction including an axial line of the leg shaft 32 and a second region Q having a radius of curvature Rb in a cross section in the joint axial direction including the axial line of the leg shaft 32 are provided in an intermediate portion 33 provided between a body portion 31 of the tripod member 3 and the leg shaft 32. Ra>Rb is set.
F16D 3/205 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
76.
SENSOR HOLDER AND BEARING DEVICE FOR VEHICLE WHEEL
Provided are: a sensor holder that can prevent influence on the performance of encoder reading by a sensor; and the like. A sensor holder 12 is provided with: a cap part 121 that is fitted into an outer ring 2 so as to cover an inner-side opening 2a of the outer ring 2; a sensor support part 122 that, at a portion of the cap part 121 opposing a magnetic encoder 11, protrudes from the cap part 121 toward one side in the axial direction, and supports a rotation speed sensor 13 for detecting displacement of the magnetic encoder 11; and a nut holding part 123 that protrudes from the cap part 121 toward the one side in the axial direction and holds a nut 124 for securing the rotation speed sensor 13 onto the cap part 121. The sensor support part 122 and the nut holding part 123 are formed separately, and one axial end surface 124a of the nut 124 held by the nut holding part 123 protrudes further toward the one side in the axial direction than one axial end surface 122c of the sensor support part 122.
A flexible boot for a constant velocity universal joint includes: attachment portions to a mating member at both ends; and a bent portion provided between the attachment portions and absorbing deformation caused by operation of a constant velocity universal joint. The flexible boot is made of a rubber material obtained by blending 50 to 80 parts by weight of HNBR having an acrylonitrile content of 15 to 21 wt % and 20 to 50 parts by weight of EPDM, the rubber material having an elastic recovery rate of 18% or more at −40° C. in a TR test.
Provided is a sintered oil-impregnated bearing comprising, on the inside-diameter surface thereof, a radial-dynamic-pressure-generating part having radial dynamic pressure grooves and dynamic pressure ridges between the dynamic pressure grooves. In a shape in which the circularity of the radial dynamic pressure grooves is linearly developed, a ridge rising ratio E is set to 0.5 or less, the ridge rising ratio E being calculated as (A + B)/D, where A and B respectively are the width dimensions of two ridge rising edges at the height position of the dynamic pressure ridges where the dimension from a center line along the development direction is 0.2 μm, and D is the total ridge width.
Provided is a tapered roller bearing of an inner ring guidance design. A smaller diameter annular part of a cage and a smaller rib of an inner ring of the bearing defines a smaller diameter-side clearance S1. A larger diameter annular part of the cage and a larger rib of the inner ring defines a larger diameter-side clearance S2. The bearing defines a dimensionless number Y which is in the range of at least 0.39 to no more than 0.88 according to the following equation: Y=(Smax/S3)×(d/l)
where d and l are a mean roller diameter and a roller length of the tapered rollers, respectively, S3 corresponds to the equation: S3=(W/2)/tan θ−(PCD/2+(d/2)/sin θ−((D/2)2−(W/2)2)1/2), Smax is chosen from the maximum values of S1 and S2, W is a pocket width of the cage, θ is a pillar angle which is a half of the angle formed, in a section corresponding to the mean roller diameter d, by surfaces of adjacent pillars of the cage that make contact with a tapered roller located in between, PCD is the diameter of roller centers representing the pitch circle diameter of the arrangement of the tapered rollers, and D is a cage inner diameter.
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
Provided is a bearing electrolytic corrosion prevention device that is excellent in prevention of wear in a ground shaft while being capable of preventing electrolytic corrosion of a rolling bearing for supporting a motor shaft, by electrically connecting the motor shaft and the ground shaft and electrically connecting the ground shaft and a case. To this end, the conductive ground shaft (11) is disposed so as to rotate together with the motor shaft (2) while being electrically connected to the motor shaft. A conductive case (10) is disposed apart from the ground shaft (11) and the motor shaft (2). A bearing (12) for supporting the ground shaft supports the ground shaft (11) with respect to the case (10). The ground shaft (11) and the case (10) are electrically connected by a conductive fluid (13) sealed between the case (10) and the ground shaft (11).
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
F16C 35/07 - Fixing them on the shaft or housing with interposition of an element
H02K 1/22 - Rotating parts of the magnetic circuit
81.
ATTACHMENT STRUCTURE FOR CONSTANT-VELOCITY UNIVERSAL JOINT BOOT
This attachment structure for a boot is obtained by fitting an annular protrusion section 26, provided on the inner peripheral surface of a large-diameter cylindrical part 21 (fixing part A) of the boot 20, to a first annular groove 8, provided on the outer peripheral surface 6a of a boot fixed part B of an outer joint member 2, and securely fastening the outer peripheral surface of the fixing part A with a boot band 24 in a state in which annular protrusions 10 provided on both sides of the first annular groove 8 in the axial direction are pressed against the inner peripheral surface of the fixing part A, and thereby attaching and fixing the fixing part A to the boot fixed part B. Support parts 11 which contact and support the inner peripheral surface 21a of the fixing part A from outside the range of the band width of the boot band 24 are provided on the outer peripheral surface of the boot fixed part B, and are disposed on both sides of the boot band 24 in the axial direction.
This rolling member has a surface and is made of steel having undergone quenching and tempering. The rolling member includes a nitrided layer formed on said surface. The nitrogen concentration on the surface is 0.20 mass percent or greater. The carbon concentration on the surface is 0.70-1.5 mass percent. The hardness at the surface is 820-1000 Hv. The amount of retained austenite on the surface is 20 volume percent or less.
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
The present invention is an oil-impregnated sintered bearing in which 5 or more axial grooves are formed in a bearing inner diameter surface at a predetermined pitch along the circumferential direction, said oil-impregnated sintered bearing being formed by the grooves and ridges formed between the adjacent grooves along the circumferential direction. The surface opening ratio of the grooves is larger than the surface opening ratio of the ridges. The ridge/groove ratio is 1 or less, and the circumferential length of the ridges is 0.1 mm or more. The depth of the grooves is 8 times or less the size of the gap between the inner diameter surface and the outer diameter surface of a shaft member. The interval angle of the circumferential interval between ridges adjacent to each other along the circumferential direction is 72° or less.
Provided are: a seal material composed of a PTFE resin composition that can be used universally and is excellent in abrasion resistance and non-aggressiveness to mated materials; a seal member for a compressor, the seal member being composed of the seal material; a cup seal for a reciprocating compressor, the cup seal being composed of the seal material; and a tip seal for a scroll compressor, the tip seal being composed of the seal material. The seal material composed of a polytetrafluoroethylene resin composition contains polytetrafluoroethylene resin as a base resin and zinc powder (metallic zinc powder or copper-zinc alloy powder). The zinc content is 1.0 mass% to 10 mass% relative to the total weight of the polytetrafluorethylene resin composition, and the average particle size of the zinc powder is 5.0 μm to 80 μm.
C08K 3/30 - Sulfur-, selenium-, or tellurium-containing compounds
C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups
F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals
F16J 15/16 - Sealings between relatively-moving surfaces
F16J 15/3204 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
F16J 15/3284 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structureSelection of materials
A rolling bearing (100) supports a rotating shaft of a vehicle drive unit. The rolling bearing comprises: an inner race (10), an outer race (20), and a rolling element (30), all of which are steel and were subjected to quenching and tempering. The inner race, the outer race, and the rolling element respectively have rolling surfaces (10da, 20ca, 30a). The hardness of the rolling surface of at least one of the inner race, the outer race, and the rolling element is 865Hv to 1245Hv.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
Provided is a wheel bearing device in which, in a case when the wheel bearing device has a large size, the axial distance between multi-row rolling elements is set to an appropriate value, so as to make it possible to improve bearing rigidity. The wheel bearing device comprises: an outer member 24; an inner member composed of a hub ring 31 which has an inner raceway surface 29 and a wheel-mounting flange 25, and an inner ring 28 which is coupled to the hub ring 31 and which has an inner raceway surface 30 at an outer diameter portion; and double-row steel balls 32 which are accommodated between the raceway surfaces so as to be freely rollable. In a lateral-face cross-sectional view of the wheel bearing device, when the contact angle of an outer-side steel ball is denoted as θ1, and the contact angle of an inner-side steel ball is denoted as θ1, the distance f between a virtual straight line L1 extending from the center of the outer-side steel ball in the contact angle θ1 direction and an outer-side base portion 43 of a vehicle-body-mounting flange 23 satisfies f>0, and the distance g between a virtual straight line L2 extending from the center of the inner-side steel ball in the contact angle θ2 direction and an inner-side base portion 44 of the vehicle-body-mounting flange 23 satisfies g>0.
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
B60B 35/14 - Torque-transmitting axles composite or split, e.g. half-axlesCouplings between axle parts or sections
This determination method for determining the characteristics of a rotary machine includes a step for calculating a first spring constant between a rolling element (15) and a first raceway (11A), a step for calculating a second spring constant with respect to a second raceway (12A), a step for calculating a third spring constant of a first finite element model (11M), a step for calculating a fourth spring constant of a second finite element model (12M), a step for calculating the spring constant of a third finite element model (15M) on the basis of the first spring constant to the fourth spring constant, and a step for determining the characteristics of a rotary machine using the calculated spring constant of the third finite element model (15M).
A power supply device (1) comprises: a windmill (2) that has a windmill support column (14) and windmill blades (16); a power generator (4) that generates power by the rotation of the windmill (2); a container comprising the windmill (2) together with the power generator (4); and a linear motion guidance device (24) for installing the windmill (2) on a wall surface of the container (6) so as to be capable of vertical motion. The linear motion guidance device (24) has: a guide member (42) that extends in the vertical direction; and a slide member (44) that moves along the guide member (42). Moreover, a clearance adjustment member (26), which fixes the windmill (2) to the container (6) and adjusts the clearance between the windmill (2) and the container (6), is provided between the windmill (2) and the container (6).
This bearing condition monitoring system comprises: an operation condition determination means (2) that determines an operation condition of a bearing on the basis of external force detected by a sensor unit (1); a diagnostic speed setting means (3) that, when the bearing is determined to be in a light-load operation condition by the operation condition determination means (2), sets a detailed diagnostic speed on the basis of the rotation speed and vibration of the bearing detected by the sensor unit (1); and an abnormality diagnosis means (4) that changes the rotation speed of the bearing to the detailed diagnostic speed and performs detailed diagnosis of the bearing.
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
Provided are: a bearing retainer (a crown retainer) that is capable of handling high-speed rotation and that exhibits excellent strength at a weld; a mold for injection molding used in manufacturing the retainer; and a retainer manufacturing method employing the mold. A bearing retainer 1 is an injection molded body of a resin composition and is a crown retainer having, atop an annular retainer body, a plurality of pockets 3 that are open on one side in an axial direction and that each retain a ball. A weld line is formed on at least one pillar 4 among pillars located between the pockets 3, the weld line being convex on one side in a circumferential direction.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
A motor unit 1 comprising: a motor unit 2; a control unit 3 that controls the motor unit 2; bearings 20, 21 that rotatably support a motor rotating shaft 7 of the motor unit 2; a bearing holder 22 that holds the bearing 20, said bearing holder 22 being positioned between the motor unit 2 and the control unit 3; and a housing 4 in which the motor unit 2, the control unit 3, the bearings 20, 21, and the bearing holder 22 are accommodated, an insulative fluid being caused to flow into the motor unit 2. The bearing holder 22 has a through-hole 22e provided so that a space in the housing 4 on the motor-unit 2 side and a space in the housing 4 on the control-unit 3 side communicate, and a partition wall member 25 via which the space between the motor-unit 2 side and the space on the control-unit 3 side are closed off from each other is positioned in the through-hole 22e.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
Provided is a wheel bearing device that, while suppressing discrepancies in phase between a constant-velocity universal joint and a wheel bearing, can facilitate fitting of the constant-velocity universal joint into the wheel bearing. A spline-fittable concave section (3h) that extends in an axial direction is formed in an inner peripheral surface of a first hole (31) of a through-hole (3e). A convex section (24) that extends in the axial direction and is spline-fittable with the concave section (3h) is formed in an outer peripheral surface of a stem section (23) of the constant-velocity universal joint (20). The convex section (24) comprises a first convex section (25) that spline-fits closely with the entirety of the concave section (3h) and a second convex section (26) that is located on an outer side relative to the first convex section (25) and can spline-fit with the convex section (3h) with a gap therebetween in a radial direction, a circumferential direction, or both the radial direction and the circumferential direction. The second convex section (26) has a shape such that the external diameter, the width in the circumferential direction, or both the external diameter and the width in the circumferential direction become greater from one side in the axial direction to the other side.
B60B 35/14 - Torque-transmitting axles composite or split, e.g. half-axlesCouplings between axle parts or sections
B60B 35/18 - Torque-transmitting axles characterised by the arrangement of the bearings for the torque transmitting elements in the axle housings
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
The present invention addresses the problem of reducing the axial-direction size of a rotation sensor-equipped bearing in which a magnetic sensor and a magnet of a magnetic ring oppose one another at a position on one axial-direction side in relation to a rolling bearing, and the magnet is positioned on one axial-direction side in relation to the magnetic sensor. An outer ring (4), which is one bearing ring among an inner ring (3) and said outer ring (4) of a rolling bearing (1), comprises: a width surface (9a) positioned at the end on one axial-direction side from among two ends that define the width of the outer ring (4); and a notch section (18) that is indented toward the other axial-direction side from the width surface (9a). A magnetic sensor (15) is attached at the notch section (18).
F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
The purpose of the present invention is to provide a wheel bearing device that makes it possible to suppress the formation of gaps in a flat surface of a crimped portion, improve the rigidity of the crimped portion, and increase the lifespan of the entire bearing device. This wheel bearing device(1) comprises: an outer ring (2); an inner member that has a hub ring (3) and inner rings (4A), (4B); and tapered rollers (5A), (5B) that are a plurality of rows of rolling bodies accommodated between the respective raceway surfaces of the inner member and an outer member so as to be capable of rolling. A crimped portion (3d) is provided to a protruding end of the hub ring (3). A stem portion (15) of an outer joint member (17) of a constant velocity universal joint (11) is inserted into the inner bore of the hub ring (3) and spline-fitted thereto. A flat surface (21) that abuts a shoulder portion (16) of the outer joint member (17) is provided to the crimped portion (3d) of the hub ring (3). The radial-direction outer surface (21a) of the flat surface (21) protrudes more to the shoulder portion (16) side of the outer joint member (17) in the axial direction than the radial-direction inner surface (21b) thereof.
B60B 35/14 - Torque-transmitting axles composite or split, e.g. half-axlesCouplings between axle parts or sections
F16C 19/08 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
Provided is a rolling bearing (1) in which a fitting surface (2b) to be fitted into a housing (10), which is a fixed side member, and a flank surface (2c) that divides the fitting surface (2b) across the entire width thereof and that faces an inner circumferential surface (10a) of the housing (10) with a larger radial clearance than the fitting surface (2b) are formed on an outer circumference of an outer ring (2). The flank surface (2c) is machined to have a roughness Ra of 5.0 μm or less.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
In this ball bearing with a seal, a retainer (10) in the ball bearing (1) to be used at a dmn value of 700,000 or higher is a crown-shaped retainer containing an engineered plastic, wherein: the diameter φx of a ball (5), the radius Ry of an inner peripheral surface of a pocket (11) in a cross-section passing through a pocket center (C) and including an axial center (O) of the bearing, and the diameter φz of the inner peripheral surface of the pocket (11) in a cross-section orthogonal at the pocket center (C) to a straight line passing through the pocket center (C) in a radial direction of the bearing have a relationship expressed by φx < 2Ry < φz; and a seal lip (21) provided on a seal member (20) can be brought into a fluid-lubricated state by an oil film formed between the seal lip and a seal sliding surface (B).
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16J 15/3204 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
F16J 15/3244 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
The present invention comprises a plurality of pocket wall parts (9) provided with recesses constituting pockets (2), two annular bodies (11) in which connecting plate parts (10) that link the pocket wall parts (9) to each other are alternately formed in a circumferential direction, a retainer (3) in which the plurality of pockets (2) are formed in the circumferential direction due to the two annular bodies (11) being made to face each other in the axial direction, an inner ring (5) having an inner ring raceway surface (4) formed in the outer peripheral surface thereof, an outer ring (7) that is provided to the outer peripheral side of the inner ring (5) and has an outer ring raceway surface (6) formed in the inner peripheral surface thereof, and a plurality of balls (8) that are provided so as to be interposed between the inner ring (5) and the outer ring (7) and are held by the pockets (2) formed in the retainer (3). In a state in which the balls (8) are in contact with the circumferential ends of the pockets (2), spherical parts (17) that are not in contact with the balls (8) are formed in the pocket wall parts (9).
F16C 19/04 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
Provided is a condition monitoring system that can be implemented as an inexpensive, small, and power-saving device with limited computational resources, and that can monitor and diagnose the status of an apparatus to be monitored with a relatively small amount of computation. A condition monitoring system (10) has a measurement data processing unit that calculates processed data from measurement data. The measurement data processing unit (11) executes: a subdivision step for subdividing time series data along a time series, which is measurement data, in the time direction; an FFT step for calculating spectral data by applying fast Fourier transform on each piece of subdivision data obtained by subdividing the time series data; a statistical step for extracting partial spectra of some bands from the spectral data and calculating statistics of the partial spectra; and an integration step for arranging the statistics in the chronological order of the original subdivision data to obtain the processed data.
A wheel bearing device for which the work of grinding a wheel hub is simplified. The wheel hub (3) has an inside track groove (3c), a seal land part (3d), a recess (3m), and a flange surface (3k). An outer-side sealing member (10) is provided with a core metal (11) and a sealing member (12). The sealing member includes a contact lip (12d) and a labyrinth lip (12e) facing the recess across a gap. The recess has a bottom (313) located between an outer diameter-side edge (311) and an inner diameter-side edge (312), and a tapered surface (314) that extends in the radial direction from the outer diameter-side edge toward the bottom and tilts toward one end of the axial direction going from the outer diameter-side edge toward the bottom.
In a parallel link mechanism, a distal end side link hub is coupled to a proximal end side link hub via three link mechanisms such that a posture of the distal end side link hub can be changed. Each link mechanism includes a proximal side end link member, a distal side end link member, and a center link member, and forms a quadric chain link mechanism composed of four revolute pairs. A singular point occurs when a central axis of the proximal or distal end side link hub and a central axis which is a rotation axis of a revolute pair section of the proximal or distal side end link member and the center link member coincide with each other. An axis angle of the center link member is specified such that a posture in which the singular point occurs is avoided.
