A long belt body (70) comprises an elastomer. A plurality of high-strength core wires (71) are embedded in the belt body (70) so as to extend in the longitudinal direction of the belt body (70) and be arranged parallel to each other. Conductor core wires (72, 73) are embedded in the belt body (70) so as to extend in the longitudinal direction of the belt body (70), the high-strength core wires (71) and the conductor core wires (72, 73) being alternately arranged in the width direction of the belt body (70).
Metalworking machines and tools; mining machines and
apparatus; belt conveyors, roller conveyors, transporters
and parts thereof; pneumatic conveyors, hydraulic conveyors,
screw conveyors, chain conveyors, bucket elevators;
construction machines and apparatus; loading-unloading
machines and apparatus; trawl winches; line haulers; net
hauling machines [fishing]; agricultural machines,
agricultural implements other than hand-operated;
non-electric prime movers, not for land vehicles [other than
"water mills" and "wind mills"]; water mills; wind mills;
power transmissions and gearing for machines [not for land
vehicles]; power transmission belts [machine elements not
for land vehicles]; machine elements [not for land
vehicles]; shafts, axles or spindles [not for land
vehicles]; bearings [machine elements not for land
vehicles]; shaft couplings or connectors [machine elements
not for land vehicles]; bearings [machine elements not for
land vehicles].
A conveyance surface (37) is a planar surface. A drive surface (30), which is the surface on the reverse side of the conveyance surface (37), has a flat surface (31) which is provided at the center section of a timing belt in the widthwise direction thereof and which extends in the longitudinal direction of the timing belt. Belt teeth (32) are formed at regular intervals in the longitudinal direction on both outer sides of the center section. The entire drive surface (30) is covered with sailcloth (36). The sailcloth (36) can be stretched in both the longitudinal and widthwise directions of the timing belt.
The present invention provides a belt attachment jig whereby torsion can be prevented during attachment of a belt. Specifically, a belt attachment jig (1) is provided with a fixing means (6) for fixing to a pulley (2). A retaining surface (8) is provided for receiving a portion of a belt (4) and retaining the belt (4) further to the outside in the axial direction of the pulley than a pulley flange (7). A torsion preventing part (10) is provided for preventing torsion of the belt (4). The torsion preventing part (10) is provided further forward in the rotation direction of the pulley (2) than the retaining surface (8) and further to the outside in the axial direction of the pulley than the pulley (2). The torsion preventing part (10) prevents torsion at the location where the belt (4) is passed between pulleys (2, 3) through the outside in the axial direction of the pulley (2).
In order to improve durability by improving the strength of the rubber itself while increasing the peeling strength with respect to core wire, canvass, or short fibers, a toothed belt (10) is equipped with: a belt main body (13), which is integrally formed by means of tooth rubber (11) provided on one surface and back rubber (12) provided on the other surface; and core wire (14), which is wound in a spiral shape and embedded extending in the lengthwise direction of the belt, in the boundary portion between the tooth rubber (11) and the back rubber (12). A tooth fabric (20) that covers the tooth rubber (11) is bonded to the surface of the tooth rubber (11), that is, to the one surface of the belt main body (13). The tooth rubber (11) is obtained by vulcanization molding of a rubber composition that includes HNBR or other rubber, resorcinol, a melamine compound, silica, and the like.
In order to improve the durability of a friction transmission belt, a V-ribbed belt (10) is equipped with an adhesive rubber part (12) and a compressed rubber part (14) provided below the adhesive rubber part (12). Core wires (11) which are belt-tensioning members are embedded in the adhesive rubber part (12). The adhesive rubber part (12) is equipped with an upper layer (12A) which forms the upper side and a lower layer (12B) which forms the lower side, with the core wires (11) as the boundary. The upper layer (12A) and the lower layer (12B) are formed by vulcanizing a rubber composition that includes a high-viscosity elastomer such as EPM or EPDM and a low-viscosity elastomer having a lower Mooney viscosity than the high-viscosity elastomer, and these layers include modified nylon microfibers as short fibers (21A), (21B). The short fibers (21A) and (21B) are oriented respectively in the width direction and the longitudinal direction of the belt.
F16G 5/20 - V-belts, i.e. belts of tapered cross-section with a contact surface of special shape, e.g. toothed
C08J 5/04 - Reinforcing macromolecular compounds with loose or coherent fibrous material
C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
C08L 77/00 - Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chainCompositions of derivatives of such polymers
F16G 5/06 - V-belts, i.e. belts of tapered cross-section made of rubber with reinforcement bonded by the rubber
This toothed belt is characterized by all or part of a belt main body being formed using a thermoplastic elastomeric alloy containing a thermoplastic polyurethane (A) and a modified ethylene-propylene-dien copolymer rubber (B) provided by an unsaturated carboxylic acid or a derivative thereof. It is desirable for the weight ratio [(B)/(A)] between the modified ethylene-propylene-dien copolymer rubber (B) provided by the unsaturated carboxylic acid or the derivative thereof and the thermoplastic polyurethane (A) to be 0.1/99.9-30/70. This toothed belt has extremely excellent durability, the belt main body being unlikely to generate wear, damage, cracks, or breakages, etc., even if used under high load for a long time.
F16G 1/28 - Driving-belts with a contact surface of special shape, e.g. toothed
C08L 23/26 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bondCompositions of derivatives of such polymers modified by chemical after-treatment
Configuring the inside of a tooth portion 15 of a toothed belt 10 with a core rubber layer 14 and the outer periphery of the tooth portion 15 with a tooth rubber layer 12. Also, including short fibers in the core rubber layer 14. The tooth rubber layer 12 is formed by curing a rubber composition containing 10 parts by weight or less high-density polyethylene with 100 parts by weight of matrix rubber. The value of tan δ for the tooth rubber layer 12 at 100-120° C. is maintained at 0.100-0.120.
Provided is a toothed belt having favorable durability even in high temperature, high load environments and oil- or water-contacting environments. The toothed belt (10) is provided with a belt main body (13) configured from a tooth rubber section (11) and a back rubber section (12). The surface of the tooth rubber section (11) is covered by a tooth fabric (20). The tooth fabric (20) has been RFL treated and the outer surface (21) thereof has been covered by the curing product of a first epoxy resin. The softening point of the curing product of the first epoxy resin is, for example, at least 110°C, and the epoxy equivalent weight of the first epoxy resin is, for example, 100-1500 g/eq. Alternatively, the tooth fabric (20) contains a second epoxy resin, a curing agent for curing the second epoxy resin, and a rubber component, and has been impregnation-processed by a processing agent.
F16G 1/28 - Driving-belts with a contact surface of special shape, e.g. toothed
C08G 59/00 - Polycondensates containing more than one epoxy group per moleculeMacromolecules obtained by reaction of epoxy polycondensates with monofunctional low-molecular-weight compoundsMacromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
A belt mounting jig which enables a belt to be easily mounted on a pulley even if the space at a side of the pulley is insufficient. Specifically, a mounting section (9) is configured from a cover section (8) and the tip of an adjusting bolt (13) which serve as a gripping section. A belt mounting jig (1) is mounted to a pulley (5) by the gripping section which grips the pulley (5) from both the inner peripheral side of a recess (10) in a side surface of the pulley (5) and the outer peripheral side of the pulley groove (3). A belt (2) engaged with the pulley groove (3) is covered with the cover section (8) from the outer peripheral side. The belt (2) is pressed toward the bottom of the pulley groove (3). The belt (2) is prevented from coming off the pulley (5). The pulley (5) is rotated to move the belt mounting jig (1) together with the pulley (5). More and more area of the belt (2) is gradually engaged with the pulley groove (3), and the belt (2) is mounted to the pulley (5).
Disclosed is a toothed belt (10) in which the inside of a tooth part (15) thereof consists of a core rubber layer (14), while the outer periphery of the tooth part (15) consists of a tooth rubber layer (12). Short fibres are mixed in the core rubber layer (14). The tooth rubber layer (12) is formed by vulcanizing a rubber composition including no more than 10 weight parts of high-density polyethylene with respect to 100 weight parts of matrix rubber. The tanδ of the tooth rubber layer (12) at 100 - 120ºC is 0.100 - 0.120.
THE GATES CORPORATION (A DELAWARE CORPORATION) (USA)
GATES UNITTA ASIA COMPANY (Japan)
Inventor
Fan, Xinjian
Lu, Wenlong
Sato, Yoshitaka
Abstract
A double-cogged V-belt with the upper and lower cog profiles symmetric and having lines ("L") and arcs ("A") connected according to a sequence from the center of a root to the center of an adjacent cog of Ll-Al -L2-A2-L3 for the upper profile and L4-A3-L5-A4-L6, and with at least one upper root and one lower root substantially aligned with each other, and with the sum of the length of Ll plus the radius of Al equal to or within 20% of the sum of the length of L4 plus the radius of A3. The upper and lower pitches may be equal and all the roots aligned, or there may be more upper cogs than lower cogs. Some or all arcs and lines may be connected tangentially.
A belt-drive toothed pulley is provided, which is used with a toothed belt to transmit vehicle drive power. The belt-drive toothed pulley comprises a toothed rim portion and a disk portion. The toothed rim portion is provided with pulley teeth. The disk portion comprises a boss section to attach a shaft, a rim-mount section to mount the toothed rim portion, a web section interconnecting the boss section and the rim-mount section, and a flange section to prevent the toothed belt from straying from its position - all of which are integrally formed. The toothed rim portion is formed of material harder than that of the disk portion.
Provided are a belt profile that can be easily mounted on and removed from a toothed belt, and a profiled belt. A profile body (4) and claw sections (6) are formed integrally with each other with a connection section (7) located between the profile body (4) and each claw section (6). Side edge sections (3a) of the toothed belt (3) are inserted between the profile body (4) and the claw sections (6) from the inner side in the width direction of the toothed belt. The profile body (4) is placed on the rear surface side of the toothed belt (3). The claw sections (6) are placed at the side edge sections (3a), on the tooth surface side. The connection sections (7) pass through outside the side surfaces of the toothed belt (3). A profile (1) is mounted on the toothed belt (3) with the profile body (4) and the claw sections (6) holding the side edge sections (3a) and with the claw sections (6) engaging with belt teeth (5). The profile (1) is removed from the toothed belt (3) in the reverse order.
A V-ribbed belt that includes a ribbed surface covered with fabric is provided. The fabric is stretchable in two predetermined directions. A method for manufacturing the V- ribbed belt is also provided. The method includes placing a belt matrix about a mandrel, placing a fabric about the external circumference of the belt matrix which wraps around the mandrel, placing the mandrel inside a shell having a plurality of grooves on the internal circumference, expanding the belt matrix and the fabric toward the internal circumference of the shell and thus pressing the fabric onto the internal circumference having the multi-ribbed structure, and curing the belt matrix with the fabric. The fabric is stretchable to accommodate itself to the multi-ribbed structure.
A belt mounting jig with which a user can easily mount a belt on pulleys while mounting the belt mounting jig on a pulley on the small-diameter side, or on the low-load side. The belt mounting jig (1) has a holding surface (7) for holding a part of a belt (4) at a position radially outward from a pulley flange (6), and also has a guide surface (8) for guiding the belt (4) to the holding surface (7). The guide surface (8) is formed as a curve surface continuing to the holding surface (7) and protruding forward in a rotation direction. The belt mounting jig (1) is mounted on a pulley (2) on the small-diameter side, or on the low-load side. The belt (4) is passed over the belt mounting jig (1) and the pulleys (2, 3), and then a pulley (3) on the large-diameter side, or on the high-load side, is rotated. The pulley (2) is rotated by tensile force of the belt (4) guided in the rotation direction by the guide surface (8). A portion of the belt (4), which portion is held by the holding surface (7), slides in the pulley axis direction and fits into a pulley groove (5).
V ribbed belt (10) includes inferior rubber layer (12), adhesive rubber layer (16) and canvas (22). The inferior rubber layer (12) contains staple fibers (14), some of which project from surface (12S) of the inferior rubber layer. In the inferior rubber layer (12), FEF being a carbon black of 49 m2/g or less average nitrogen surface area (ASTM D1765-01) is used as a reinforcing agent to thereby produce fine unevenness on the surface (12S) of the inferior rubber layer. This prevents the generation of noise at the time of use of the V ribbed belt (10). Further, by virtue of the use of the reinforcing agent, appropriate surface roughness can be maintained even after the wear-out of the staple fibers (14) projecting from the surface (12S) of the inferior rubber layer, thereby attaining inhibition of the generation of noise.
A V-ribbed belt (10) includes a lower rubber layer (12), an adhesive rubber layer (16), and a canvas (22). The lower rubber layer (12) contains short fibers (14) a part of which is projecting from the friction surface (12S) of the lower rubber layer (12). In the lower rubber layer (12), generation of abnormal noise is prevented when the V-ribbed belt (10) is used by using FEF which is carbon black having an average nitrogen surface area of 49 m2/g or less (ASTM D1765-01) as a reinforcement agent, and by providing minute unevenness on the friction surface (12S). Furthermore, appropriate surface roughness is maintained even after the short fibers (14) projecting from the friction surface (12S) have worn down by employing the reinforcement agent, and generation of abnormal noise can be suppressed.
An arm (3) supporting a tension pulley (2) around which an endless torque transmitting member (B) is looped is supported by a fixed member (E) via a base member (7). A torsion coil spring (8) is interposed between the base member (7) and the arm (3). The base member (7) is brought into pressure-contact with the fixed member (E) by a tightening force of a bolt (6). A pivot shaft (5) is fitted onto the outer circumference of the bolt (6) so as not to cause a tip to contact the fixed member (E). By transmitting an axial force generated by tightening the bolt (6) to the base member (7) via a flange (5A) formed on the outer circumference of the pivot shaft (5), the distribution of a contact pressure between the fixed member (E) and the base member (7) is optimized.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Sprockets and pulleys, variable diameter pulleys, adjustable pulleys, dual pulley tensioning systems; tensioners, lockable tensioning devices, tensioning idlers, all of the foregoing being parts of engines, machines or motors; belts for machines; power transmission belts for engines and motors, namely, variable speed belts; timing belts for engines and motors for land vehicles; timing belts for machines, motors and engines used in industrial applications; v-ribbed belts for engines and motors; v-belts for engines and motors; belts for linear motion control; multi-ribbed belts for machines and engines; fan belts for motors; dynamo belts; timing belts for synchronous conveying, linear positioning and power transmission for machines, motors and engines used in industrial applications; timing belts for machines, motors and engines used in industrial applications, namely, linear belts, profile belts, welded belts, flex belts, wide belts, vacuum belts and self tracking belts; synchronous belts and drive belts for conveyors or machines; synchronous and toothed belts for industrial applications; power transmission drive components, namely, low modulus belts, and isolators for synchronous belt drive systems, other than for land vehicles, and replacement parts therefor; and components for synchronous belt drive systems, namely, timing belt kits comprised of timing belts, tensioners, idler pulleys, and cam and crankshaft oil seals, all of the foregoing for use with land vehicles Transmission belts, power transmission belts and timing belts for land vehicles, namely, variable speed belts; engine transmission belts for land vehicles; power transmission drive components, namely, tensioners, tensioning idlers, lockable tensioning devices, variable diameter pulleys, adjustable lock center pulleys, dual pulley tensioning systems, toothed belts and v-ribbed belts, low modulus belts
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Metal hardware, including pulleys, sprockets including sprockets for use with belts, belt pulleys, belt tensioners; parts and fittings for all the aforesaid goods. Parts and fittings for engines, machines, motors and dynamos; sprockets and pulleys, variable diameter pulleys, adjustable pulleys, dual pulley tensioning systems; tensioners, lockable tensioning devices, tensioning idlers, being parts of engines, machines or motors; belts, belts for engines, machines and motors; power transmission belts for engines, machines and motors including variable speed belts; timing belts for engines, motors and machines; power transmission belting; v-ribbed belts for engines, motors and machines; v-belts for engines, motors and machines; belts for material handling; conveyor belts; belt conveyors; belts for conveyors; belts for linear motion control; multi-ribbed belts for machines, engines and motors; fan belts including fan belts for motors; dynamo belts; timing belts for synchronous conveying, linear positioning and power transmission for machines, motors and engines; timing belts for machines, motors and engines including linear belts, profile belts, welded belts, flex belts, wide belts, vacuum belts, self tracking belts and flat belts; synchronous belts and drive belts for conveyors and for machines; synchronous and toothed belts for industrial applications; power transmission drive components including low modulus belts and components for synchronous belt drive systems (other than for land vehicles); machine couplings and belting (except for land vehicles); elevated belts; lift belts; parts and fittings for all the aforesaid goods. Parts and fittings for vehicles and for apparatus by locomotion by land, air or water; sprockets; transmission belts, power transmission belts and timing belts for land vehicles including variable speed belts; engine transmission belts for land vehicles; power transmission drive components including tensioners, variable diameter pulleys, tensioning idlers, adjustable lock centre pulleys, lockable tensioning devices, dual pulley tensioning systems, toothed belts and v-ribbed belts, low modulus belts, and components for synchronous belt drive systems, all for use with land vehicles; belts, including drive belts, for land vehicles; parts and fittings for all the aforesaid goods.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Metal hardware, including pulleys, sprockets including sprockets for use with belts, belt pulleys, belt tensioners; parts and fittings for all the aforesaid goods. Parts and fittings for engines, machines, motors and dynamos; sprockets and pulleys, variable diameter pulleys, adjustable pulleys, dual pulley tensioning systems; tensioners, lockable tensioning devices, tensioning idlers, being parts of engines, machines or motors; belts, belts for engines, machines and motors; power transmission belts for engines, machines and motors including variable speed belts; timing belts for engines, motors and machines; power transmission belting; v-ribbed belts for engines, motors and machines; v-belts for engines, motors and machines; belts for material handling; conveyor belts; belt conveyors; belts for conveyors; belts for linear motion control; multi-ribbed belts for machines, engines and motors; fan belts including fan belts for motors; dynamo belts; timing belts for synchronous conveying, linear positioning and power transmission for machines, motors and engines; timing belts for machines, motors and engines including linear belts, profile belts, welded belts, flex belts, wide belts, vacuum belts, self tracking belts and flat belts; synchronous belts and drive belts for conveyors and for machines; synchronous and toothed belts for industrial applications; power transmission drive components including low modulus belts and components for synchronous belt drive systems (other than for land vehicles); machine couplings and belting (except for land vehicles); elevated belts; lift belts; parts and fittings for all the aforesaid goods. Parts and fittings for vehicles and for apparatus by locomotion by land, air or water; sprockets; transmission belts, power transmission belts and timing belts for land vehicles including variable speed belts; engine transmission belts for land vehicles; power transmission drive components including tensioners, variable diameter pulleys, tensioning idlers, adjustable lock centre pulleys, lockable tensioning devices, dual pulley tensioning systems, toothed belts and v-ribbed belts, low modulus belts, and components for synchronous belt drive systems, all for use with land vehicles; belts, including drive belts, for land vehicles; parts and fittings for all the aforesaid goods.
