Cutting performance where an attachment part of a spindle is downsized and inclined in a horizontal direction of a desk-top cutting machine is improved. A spindle 33 holding a serration 60 is formed in a cylindrical shape, and bearings 32 and 34 are arranged on an inside and an outside of the cylindrical shape, respectively, to be cantilevered with respect to a frame 15. The bearing 34 on the outside is held between the bearing 34 and an inner wall part of a cylindrical wall 16 formed at the frame 15, and the bearing 32 on the inside is fixed by a metal pin 31 press-fitted so as to extend from the frame 15 in an axial direction of the spindle 33. A fourth pulley 41 rotating the spindle 33 is arranged so that a position in the axial direction of a V-belt 42 partially overlaps with positions in the axial direction of the bearings 32 and 34.
B27B 5/30 - Machines à scier travaillant avec des lames de scie circulairesOrganes ou équipements ad hoc DétailsMachines à scier travaillant avec des lames de scie circulairesOrganes ou équipements ad hoc Parties constitutivesAccessoires pour monter ou fixer les lames ou les arbres de scies
B23D 45/04 - Machines à scier ou dispositifs de sciage à lames circulaires ou à disques à friction la lame circulaire ou la pièce à scier étant portée par un levier à pivot
B23D 45/14 - Machines à scier ou dispositifs de sciage à lames circulaires ou à disques à friction pour le découpage autrement que dans un plan perpendiculaire à l'axe de la pièce à scier, p. ex. pour faire une coupe en biseau
B23D 47/00 - Machines à scier ou dispositifs de sciage travaillant au moyen de lames circulaires, caractérisés uniquement par la structure d'organes particuliers
B23D 47/12 - Machines à scier ou dispositifs de sciage travaillant au moyen de lames circulaires, caractérisés uniquement par la structure d'organes particuliers de l'entraînement de lames de scies circulaires
B27B 5/20 - Scies circulaires à table à lame circulaire mobile, p. ex. montée sur un chariot la lame étant réglable en fonction de la profondeur ou de l'angle de coupeScies radiales, c.-à-d. machines à scier avec un bras radial pivotant pour le guidage de chariot mobile
Provided is an electric tool that is more convenient than those in which the switching frequency of the switching element is constant regardless of load. The electric tool (1) is provided with a motor (10), an FET (12) for controlling electric conduction to the motor (10), a microcomputer (20) for controlling the ON-OFF of the FET (12), and a current detection circuit (15) for detecting the current flowing to the motor (10). When the current to the motor (10) is at a threshold or higher, the microcomputer (20) reduces the switching frequency of the FET (12) below when the current to the motor (10) is less than the threshold.
Provided is a reciprocating tool that is formed to be thin at a region near where an operation member is mounted, and that has low vibration. A spindle 13, which is a rotation shaft oriented along the up-down direction, is provided on a front side of a housing 10. The spindle 13 is driven to rotate by a transmission shaft 21. A transmission direction conversion mechanism 30 for transmitting the rotary motion of the transmission shaft 21 to the spindle 13 which intersects the transmission shaft is provided between the spindle 13 and the transmission shaft 21. A counterweight 14 is provided between a bevel gear 30B and a plunger 12 disposed on the bottom side in the up-down direction. A drive mechanism 40 for driving the plunger 12 and the counterweight 14 is provided to the spindle 13.
B23D 51/16 - Machines à scier ou dispositifs de sciage à lames droites, caractérisés uniquement par la structure d'organes particuliersMoyens de support ou d'attache des outils qui, couverts par le présente sous-classe, sont fixés à leur monture à leurs deux extrémités de l'entraînement ou des mécanismes d'avance des outils droits, p. ex. des lames de scies, des archets
B23D 49/16 - Dispositifs de sciage tenus à la main ou entraînés manuellement à lames droites tenues à leurs deux extrémités entraînés par des moteurs, p. ex. par des moteurs électriques ou magnétiques
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B27B 19/09 - Scies à moteur comportant une lame maintenue à ses deux extrémités ou à l'une d'elles uniquement, p. ex. scies sauteuses, scies à chantourner portatives
Provided is a reciprocating tool configured so that vibration caused by reciprocating motion is prevented from being transmitted from a base section to a material to be cut. A reciprocating tool 1 provided with a base section 30 located at the lower part of a housing 2, wherein the base section 30 has a base foundation 31 and a base plate 41. The rear portions of the base foundation 31 and the base plate 41 are directly affixed together by two left and right screws 45a and serve as a contact section. The front portions of the base foundation 31 and the base plate 41 are held through damping mechanisms 50a provided at two left and right locations, and the front portions serve as a rocking section. The base foundation 31 and the base plate 41 are held without contact with each other, at the front portions serving as the rocking section, and therefore, a satisfactory vibration damping effect can be obtained, the transmission of vibration caused by reciprocating motion can be reduced, and cutting accuracy is improved.
B23D 51/02 - Machines à scier ou dispositifs de sciage à lames droites, caractérisés uniquement par la structure d'organes particuliersMoyens de support ou d'attache des outils qui, couverts par le présente sous-classe, sont fixés à leur monture à leurs deux extrémités des bancsMachines à scier ou dispositifs de sciage à lames droites, caractérisés uniquement par la structure d'organes particuliersMoyens de support ou d'attache des outils qui, couverts par le présente sous-classe, sont fixés à leur monture à leurs deux extrémités des dispositifs de guidage des tables de travail ou des porte-sciesMachines à scier ou dispositifs de sciage à lames droites, caractérisés uniquement par la structure d'organes particuliersMoyens de support ou d'attache des outils qui, couverts par le présente sous-classe, sont fixés à leur monture à leurs deux extrémités des bâtis
B23D 49/16 - Dispositifs de sciage tenus à la main ou entraînés manuellement à lames droites tenues à leurs deux extrémités entraînés par des moteurs, p. ex. par des moteurs électriques ou magnétiques
Provided is an electrically powered tool with which it is possible to suppress the effect of fluctuation in the voltage of a power supply on the load discrimination accuracy. An electrically powered tool (1) is provided with a motor (10), a cell pack (5) for feeding electrical power to the motor (10), a cell voltage detection circuit (17) for detecting the cell voltage, a current detection circuit (15) for detecting the current flowing through the motor (10), and a microcomputer (20) for controlling driving of the motor (10). The microcomputer (20) is capable of discriminating the load state of the motor (10) according to whether or not the current flowing through the motor (10) is equal to or greater than a threshold value, and of changing the threshold value in correspondence with the cell voltage. When the current flowing through the motor (10) remains below the threshold value for a predetermined length of time, the microcomputer (20) stops the supply of electric power to the motor (10).
Provided is a band saw in which a plastic housing is used in order to reduce the weight of a device, and in which the likelihood of a blade dislodging from a guide roller is reduced. A first guide roller mechanism 30 and a second guide roller mechanism 40 have a pair of cylindrical guide rollers that rotate while being in contact, respectively, with the outer peripheral side and the inner peripheral side of the blade 20. The tip sides of the guide rollers 31, 41 and the guide rollers corresponding to the guide rollers 31, 41 are inclined with respect to the direction in which the blade runs. As a result, a force acts on the blade in the direction opposite that in which the blade is dislodged, making it possible to stabilize the position in which the blade is running.
B23D 55/08 - Machines à scier ou dispositifs de sciage à lames de scie à ruban, caractérisés uniquement par la structure d'organes particuliers des dispositifs de guidage ou d'avance des lames de scie à ruban
B23D 53/12 - Dispositifs de sciage à lames de scie à ruban, tenus à la main ou manœuvrés manuellement
Provided is a reciprocating work machine capable of further reducing vibration transmitted from a housing to a handle. Provided is a reciprocating work machine (10) having an electric motor, a piston and a striker that reciprocate by the power of the electric motor and strike a tool, and a housing (12) that accommodates the electric motor, and the piston and the striker, the reciprocating work machine (10) having: a resin handle (50) operably connected to the housing (12); a spring (74) that is provided between the housing (12) and the handle (50) and that extends and contracts in the reciprocating direction of the piston and the striker when the handle (50) operates relative to the housing (12); and a weight (61) that is provided to the handle (50) and is constituted by a material having a specific gravity higher than the specific gravity of material constituting the handle (50) and a material constituting the housing (12), respectively.
In order to provide an electrical device having high usability in comparison with those thus far, an electric tool 1 is provided with a housing 2, a handle part 3 provided rotatably on the housing 2 via a rotational axis 10 and a hook (hanging tool) 5 provided at an end part of the handle part 3. In a retracted position, the hook 5 surrounds an end side of the handle part 3 in a direction around an axis of the handle part 3. A corner section of a battery pack 30 engages with the hook 5 so as to restrict rotation of the hook 5 from the retracted position toward a use position.
Provided is a centrifuge that can suppress unstable behavior caused by the occurrence of buoyancy of a rotor, by generating a pressing force downward in the axial direction of the rotor. In a centrifuge having a rotor 3 with a rotor body 30 that holds a sample and that is rapidly rotated, an inclined surface 36 that extends upward as it extends radially outward is formed in an upper-side outer peripheral portion of the rotor, in a region that is at a radially outward side and at an upper side of the outer edge of an opening. The inclined surface is a continuous ring-like inclined surface that has the same cross-sectional shape in the circumferential direction and is formed into a straight-line shape or a curved-line shape in cross-section along a rotation central axis A1. Although winds 45 to 48 occur during high-speed rotation of the rotor, the winds indicated by arrows 48 are rectified by the inclined surface 36, and a component force F for pressing the rotor body in a downward direction acts thereon.
Provided is an electric tool for which, by devising the arrangement of circuit boards so as to be filled with resin, mounting efficiency is increased and output is increased while size reduction is achieved. A board case (40) is disposed inside a cylindrical housing (2, 3) for housing a brushless motor, and a first circuit board (50) for driving a motor (5) and a second circuit board (70) on which a control circuit is installed are housed inside the board case. The boards (50, 70) are stacked inside the board case in the direction that is perpendicular to the open face thereof and are disposed so as to extend in directions that are parallel to the open face. The boards (50, 70) are stacked so as to be parallel using a pin header and only the first circuit board (50) is screwed to the board case. Then, a curable resin that hardens from a liquid state is filled inside the board case (40) and is cured with the boards (50, 70) completely immersed therein.
Provided is a hammer drill whereby the size of the hammer drill as a product is reduced by decreasing the length of an intermediate shaft for realizing a plurality of operation modes, and also reducing the size of a movement stroke of a switching member. A hammer drill 1 in which a first transmission member 31 and a second transmission member 41 are moved in an axial direction on an intermediate shaft 20, whereby an impact mode, a rotation-impact mode, and a rotation mode are switched, wherein the hammer drill 1 is configured so that the first transmission member 31 is urged by a spring 26 with respect to the intermediate shaft, the second transmission member 41 is urged by a spring 44, one transmission member is moved via a switching member 27 from an eccentric cam and a single operation mode is set, the other transmission member is directly moved by a pin of the eccentric cam and a single operation mode is thereby set, and a single operation mode is set in a manner such that an external force caused by the eccentric cam is not imparted to either of the first transmission member and the second transmission member. The amount of movement of the switching member in the axial direction can thereby be reduced, and the periphery of the intermediate shaft can be made compact.
Provided is a belt sander in which entrainment of dust is prevented. Provided is a belt sander (1) having: a motor (10); at least two rollers (41, 42) capable of detachably stretching an endless abrasive belt (11), at least one of the rollers (41, 42) being rotationally driven by the motor; and a cover (71) capable of covering at least a portion of the stretched abrasive belt as viewed in the axial direction of the rollers; the belt sander characterized in that the state in which the abrasive belt is covered by the cover can be removed by changing the relative positions of the cover and the rollers.
B24B 23/06 - Machines de meulage portatives, p. ex. à guidage manuelAccessoires à cet effet avec des courroies abrasives, p. ex. avec des courroies sans finAccessoires à cet effet
B24B 55/10 - Équipement d'enlèvement des poussières sur les machines à meuler ou à polir spécialement conçus pour machines de meulage portatives, p. ex. à guidage manuel
Provided is a mobile work machine such that vibrations can be eliminated efficiently while ensuring operability. The work machine is provided with a drive source and an operation rod having at a front part thereof a tool that is driven by the driving source, and has a grip part connected to the operation rod through a vibration reducing connection part. The vibration reducing connection part is configured so that when the longitudinal direction of the operation rod is defined as the front-rear direction, the acceptable amount of relative movement of the grip part and the operation rod in the left-right direction is greater than the acceptable amount of relative movement of the grip part and the operation rod in the front-rear direction.
A01D 34/68 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur
The objective of the present invention is to achieve an engine-driven work machine capable of controlling the rotational frequency of a crankshaft reliably by means of a cooling breeze from a cooling fan. This engine-driven work machine is equipped with: a cylinder in which a piston is capable of moving reciprocally in the up/down directions; a crankcase provided below the cylinder; a crankshaft that extends perpendicular to the direction of the reciprocal movement of the piston, and that rotates in conjunction with the reciprocal movement of the piston; a throttle valve that controls the amount of air taken into the cylinder, and controls the rotational frequency of the crankshaft; a throttle shaft that controls the degree of opening of the throttle valve by rotating; a cooling fan that is affixed to the crankshaft on the outside of the crankcase, and that rotates in conjunction with the rotation of the crankshaft, thereby generating a cooling breeze that cools the cylinder; and a breeze-receiving part that receives the cooling breeze and is moved by the cooling breeze, thereby causing the throttle shaft to rotate. The breeze-receiving part holds the axial direction component of the crankshaft in the movement direction of the breeze-receiving part, and the degree of opening of the throttle valve decreases as the breeze-receiving part moves toward the cylinder in the direction of the crankshaft.
F02D 9/02 - Commande des moteurs par étranglement des conduits d'amenée de l'air ou du mélange air-combustible ou par étranglement des conduits d'échappement par étranglement des conduits d'amenée
A01D 34/68 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur
Provided is a driver configured so that the size of a piston will not increase in a center axis direction. A driver (10) has: a driver blade (23) for impacting a fastener (48); a piston (18) to which the driver blade (23) is mounted; a cylinder (16) in which the piston (18) is accommodated so that the piston (18) can reciprocate; and an air pressure chamber (21) for impacting the piston (18). The driver (10) further has: a seal member (55) provided on the outer peripheral surface of the piston (18) and in contact with the cylinder (16); and a slide ring (56) provided on the outer peripheral surface of the piston (18) and guiding the reciprocal movement of the piston (18) within the cylinder (16).
B25C 1/06 - Outils tenus à la main pour clouerDispositifs d'alimentation en clous pour ces outils actionnés électriquement
B25C 1/04 - Outils tenus à la main pour clouerDispositifs d'alimentation en clous pour ces outils utilisant la pression d'un fluide
F16J 9/28 - Segments de piston, leurs logementsSegments d'étanchéité de structure similaire en général caractérisés par l'emploi de matériaux particuliers de matériaux non métalliques
Provided is a chain saw configured so that grinding of the blade sections of a saw chain can be performed with a simple method, and so that sparks generated when grinding do not fly to the outside. Provided is a flying-spark prevention means for preventing the flying of sparks generated by a grinding stone (65) when grinding the blade sections. By using an operation lever (61), the grinding stone can be moved within a space covered by a body housing (2) and a side cover. The flying-spark prevention means is near the grinding stone and includes a first blocking member (57) which juts out above the saw chain (12) and a second blocking member (56) which juts out below the saw chain. The blocking members enable the sparks generated when grinding the saw chain to be significantly suppressed from flying outside of the side cover. The first and second blocking members can be moved in the left or right direction by the operation of a lock lever. In addition, the lock lever serves as a stopper for stopping movement of the grinding stone when the flying-spark prevention means is not being operated.
Provided is an air compressor configured so that stress occurring in a valve body for opening and closing an air vent connected to an air chamber can be reduced. An air compressor is provided with: a second compression chamber 40; and a second valve seat 38 provided with an air intake 52 which extends through the second valve seat 38 and which connects to the second compression chamber 40, wherein the air compressor has: a groove 76 provided in the end surface 73 of the second valve seat 38, which forms the second compression chamber 40, and connecting the air intake 52 and the second compression chamber 40; a valve body 82 provided to the second valve seat 38 and opening and closing the air intake 52 and the groove 76; and a support section 84 which is provided to the second valve seat 38 and which, in a state in which the air intake 52 and the groove 76 are closed by the valve body 82, supports the valve body 82, the groove 76 being provided with a plurality of ends 76B.
F04B 39/10 - Adaptation ou aménagement des organes de distribution
F04B 41/02 - Installations ou systèmes de pompage spécialement adaptés aux fluides compressibles comportant des réservoirs
F04C 29/12 - Dispositions pour l'admission ou l'échappement du fluide de travail, p. ex. caractéristiques de structure de l'admission ou de l'échappement
The purpose of the invention is to provide a self-propelled grass mower that can perform precise guidance control by reliably detecting a guidance signal with a guidewire. Provided is a self-propelled grass mower that comprises a wheel motor to drive a wheel, a cutting blade motor to drive a cutting blade, a rechargeable battery to supply electrical power to these motors, and a guidewire sensor to detect a magnetic field generated by a guidewire formed into a loop, and that detects whether the device is inside or outside of a region enclosed by the guidewire and runs autonomously in a grass cutting region, wherein the supply voltage is reduced only for the cutting blade motor when a magnetic field is detected by the guidewire sensor. Driving of the cutting blade motor is restarted after detection of the magnetic field has completed. Thereby, the impact of noise due to the cutting blade motor is eliminated.
A01D 34/64 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical montés sur un véhicule, p. ex. un tracteur, ou tirés par un animal ou un véhicule
A01B 69/00 - Direction des machines ou instruments agricolesGuidage des machines ou instruments agricoles selon un parcours déterminé
G05D 1/02 - Commande de la position ou du cap par référence à un système à deux dimensions
The purpose of the invention is to provide a self-propelled grass mower that is configured so that a drive mechanism comprising a cutting blade can retract up when an external force is applied to the cutting blade held by a raising and lowering mechanism. Provided is a self-propelled grass mower that comprises a cutting blade motor 30 that is held so that the rotary shaft 30c faces the vertical direction, and a rotary type cutting blade 35 that is mounted to the distal end of the rotary shaft and that rotates on plane substantially parallel to the ground, and in which the cutting height of the cutting blade is adjusted by moving the motor in the vertical direction, wherein the motor and cutting blade can be moved up by moving a motor cylinder 70 when a force that lifts the cutting blade 35 is applied. The cutting blade can be moved up by disposing a steel ball 68b in a semi-spherical recess 64b formed on the outer circumferential face of a dial cylinder 60 and suspending the motor cylinder by a lift guide rib 73 formed on the motor cylinder side.
A01D 34/64 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical montés sur un véhicule, p. ex. un tracteur, ou tirés par un animal ou un véhicule
Provided is a centrifuge for which manufacturing cost increases can be suppressed by efficiently combining reinforcing fibers with a flexible structure and a protective tube with a rigid structure. A band-shaped nonmetallic fabric 10 woven of high density fibers or the like is wound two to several times on a cooling pipe 5 disposed on the outside of a bowl 4. A cylindrical protector 8 formed from a steel tube is disposed on the outer peripheral side and an insulating layer 6 is formed by filling insulating material with foaming properties from a chemical reaction of polyurethane in a space between the bowl 4 and the cylindrical protector. Here, the width W of the fabric is made smaller than the height Hi of the insulating layer so that the fabric is made to be completely accommodated in the insulating material, with the cooling pipe and fabric made not to come in contact with outside air. Thus, the cylindrical protector can be made thinner because of the reinforcing effect of the fabric.
In order to enable easy determination of whether a battery pack possessed by a user is one to be guaranteed or not and clearly differentiate an old battery pack from a new battery pack not to allow the old battery pack to be used in the field, when a battery diagnosis device determines that the battery pack is one to be guaranteed, information held by the diagnosed battery pack is written into a second battery pack different from the diagnosed battery pack.
G01R 31/36 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge
H01M 10/42 - Procédés ou dispositions pour assurer le fonctionnement ou l'entretien des éléments secondaires ou des demi-éléments secondaires
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
The objective of the present invention is to provide an electric tool with which it is possible to limit power consumption and also to limit torque pulsations without demagnetizing a rotor permanent magnet. To this end, the electric tool is provided with: a brushless motor including a stator having a plurality of windings and a rotor which is capable of rotating relative to the stator; a converting means for converting an alternating current voltage supplied from an alternating-current power supply into a direct current varying voltage; a voltage detecting means for detecting the varying voltage; and an energization switching means which has output lines for applying the varying voltage to the plurality of windings, and which causes the rotor to rotate by switching the energized winding to which the varying voltage is to be applied, from among the plurality of windings; wherein the energization switching means varies the number of energized windings on the basis of the varying voltage.
In order to provide an electric tool in which a motor is assuredly prevented from being rebooted when power is turned on again after a power supply interruption due to a contingency, a disk grinder (1) includes a motor (2) and a switch (12) that allows switching between an ON position at which the motor is driven according to operations by an operator and an OFF position at which the motor is stopped. Furthermore, first and second reboot preventing means (60, 90) are provided to disable driving of the motor until the switch returns to the ON position when power supplied to the motor (2) drops to a level less than or equal to a predetermined value.
In order to provide a battery pack that allows information inside the battery pack to be outputted via communication with an external device without being provided with a dedicated terminal, the battery pack 20 according to the present invention has: a temperature detection element 33 that monitors the temperature of a battery 21; a battery type identification element 34 that identifies the type of battery; a first terminal d for transferring information of the temperature detection element to an external device 1; and a second terminal e for transferring information of the battery type identification element to the external device 1. The battery pack 20 is characterized in having blocking means 35 and 36 for blocking the transfer of the information from the temperature detection element and the battery type identification element to an external device 60.
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H01M 2/10 - Montures; Dispositifs de suspension; Amortisseurs; Dispositifs de manutention ou de transport; Supports
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
In a work tool with a telescopic rod, the present invention makes wiring from a motor operation switch to a control circuit and an inverter circuit efficient and reduces the number of connecting wires necessary. Provided is a work tool that has an extendable wand section (3) and drives a brushless motor (13) provided on the tip of the wand section by a battery pack (70) provided on a grip section (4), wherein the control circuit and the inverter circuit are provided on a control circuit board (25) near the brushless motor, and a motor switch (44) is provided on a back housing (41). The connecting wire for connecting the switch to the control circuit is covered by a coiled cord together with a power source wire from the battery pack to form extendable wiring (8). The wand section is configured from a hollow pipe and the coiled cord is disposed inside the wand section.
Provided is an impact tool which can be operated with increased easiness and can provide increased work efficiency. An impact tool has: a motor (31) accommodated within a housing (14); a rotation transmission mechanism (51) for transmitting the rotational force of the motor (31) to a front end tool; an impact transmission mechanism (41) for converting the rotational force of the motor (31) into impact force and transmitting the impact force to the front end tool; and a mode selection dial (61) serving as a mode selection mechanism for switching the rotation transmission mechanism (51) to a rotation transmission state and to a transmission stopped state. When an adjustment mode is selected by the mode selection dial (61), the motor (31) is driven at an adjustment-mode speed lower than a normal-work-mode speed, thereby transmit the rotational force of the motor (31) to the front end tool. Thus, the orientation of the front end tool can be automatically adjusted by the motor (31).
The objective of the present invention is to provide a working machine with which an increase in size of the working machine can be suppressed. This objective is achieved by means of a working machine in which a work tool rotates under the motive force of a motor, the working machine comprising: a transmission mechanism which transmits a rotational force of the motor to the work tool; a front case (25) in which the transmission mechanism is disposed; a gripper (36) which is attached projecting from an outer surface of the front case (25), and which is grasped by an operator; and an attachment hole (41) which is provided in the front case (25) and to which the gripper (36) is attached, wherein the attachment hole (41) penetrates through the front case (25) as seen in a plan view intersecting an axis (A1) which is the center of rotation of the work tool.
In order to provide a charging device that efficiently cools a battery pack, a charging device 1 is provided with: a case 2 having a bottom section, an upper section facing the bottom section, and a side surface section connecting the bottom section and the upper section to each other; a plurality of fans 5, 6 that are provided in the case; and a charging circuit unit 4, which is provided in the case, and is configured to charge a battery pack 3, said charging circuit unit having a heat generating element that generates heat when the battery pack 3 is charged. The fans are disposed along the side surface section.
In order to provide a charging device that can charge a high capacity battery pack in a short period of time, provided is a charging device capable of charging a battery pack provided with a secondary battery, wherein the charging device is configured so that the battery pack which has a nominal capacity of 5 Ah or greater can be charged with a charge current of 2C or greater.
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H02H 7/18 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour pilesCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour accumulateurs
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02J 7/10 - Régulation du courant ou de la tension de charge utilisant des tubes à décharge ou des dispositifs à semi-conducteurs utilisant uniquement des dispositifs à semi-conducteurs
In order to provide an electric tool that has improved motor cooling efficiency, a universal motor 3 provided on a portable circular saw 1, which is the electric tool, comprises an output shaft 31, a cooling fan 32 that is affixed to the output shaft 31, an armature 6 that is affixed to the output shaft 31, and a stator 7 that is provided with a facing surface 71D that faces the armature 6 in the radial direction of the output shaft 31. The facing surface 71D is provided with a cooling groove 71a which is recessed in the radial direction of the output shaft 31, and which extends in the axial direction of the output shaft 31.
H02K 9/06 - Dispositions de refroidissement ou de ventilation par l'air ambiant s'écoulant à travers la machine comportant des moyens pour établir la circulation d'un agent de refroidissement avec des ventilateurs ou des dispositifs d'entraînement mûs par l'arbre de la machine
A driving machine is provided such that jamming of a fastener in an ejection part can be dealt with. A driving machine (10) provided with an ejection part (27) supplied with a fastener, a driver blade (23) that operates from a first position toward a second position and drives the fastener into a driven member, and a rack (42) that is disposed on the driver blade (23). The driving machine has: a rotary component (38) that engages with the rack (42) and causes the driver blade (23) to move from the second position to the first position; and a lock plate (56) that engages with the rack (42). The driver blade (23) moves from the second position to the first position during one rotation of the rotary component (38), the rotary component (38), upon being disengaged from the rack (42) after the driver blade (23) has moved from the second position to the first position, operates from the first position toward the second position, and the lock plate (56) can engage with the rack (42) when the driver blade (23) stops before reaching the second position from the first position.
In order to provide an electric tool capable of suppressing variations in motor characteristics between external power supplies having different voltages, and of suppressing increases in the size of the electric tool itself, this electric tool is provided with: a motor including a stator around which a plurality of windings are wound, and a rotor capable of rotating relative to the stator; an output portion driven by the rotation of the rotor; a power supply connecting portion capable of being connected to an external power supply serving as a drive source for the motor; a power supply voltage detecting means for detecting the voltage of the external power supply connected to the power supply connecting portion; and an electrical connection varying means for varying a scheme for electrically connecting the windings to one another in accordance with the voltage of the external power supply.
H02P 7/28 - Dispositions pour réguler ou commander la vitesse ou le couple de moteurs électriques à courant continu pour réguler ou commander individuellement un moteur dynamo-électrique à courant continu en faisant varier le champ ou le courant d'induit par commande maîtresse avec puissance auxiliaire utilisant des tubes à décharge ou des dispositifs à semi-conducteurs utilisant des dispositifs à semi-conducteurs
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
H02K 23/64 - Moteurs spécialement adaptés pour fonctionner au choix sous courant alternatif ou sous courant continu
H02P 6/06 - Dispositions pour la régulation de la vitesse d'un seul moteur dans lesquelles la vitesse du moteur est mesurée et comparée à une grandeur physique donnée pour ajuster la vitesse du moteur
Provided is an electrical working machine allowing control of low-speed rotation to be easily achieved compared to prior art. Any one of a plurality of different types of storage batteries with mutually different rated output voltages can be selectively mounted in a self-propelled lawn mower 1. A drive power source circuit 17 is a DC-DC converter capable of at least stepping down the voltage, and outputs the voltage by converting the output voltage of the storage battery 30 to a stable direct voltage of 18 V. The output voltage of the drive power source circuit 17 is supplied to a control power source circuit 14 via a back flow preventing diode D2 and is also supplied to a left-wheel driver 18, a right-wheel driver 19 and a cutting blade driver 20.
A01D 34/78 - Mécanismes d'entraînement des couteaux électriques
A01D 34/64 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical montés sur un véhicule, p. ex. un tracteur, ou tirés par un animal ou un véhicule
A01D 34/68 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur
Provided is a cutting machine configured so as to prevent the rocking of a cutting section during the mounting and removal of a battery pack. A cutting machine has: a cutting section provided with a motor, a motor housing which accommodates the motor, an output shaft which is rotated by the rotation of the motor and to which a cutting blade is removably mounted, a battery pack which is the power source for the motor, and a battery pack mounting/removal section which has a pair of rails with which the battery pack removably engages; a base having a contact surface on which a material to be worked can be placed; and a rocking support mechanism which is connected to the base and the cutting section, is provided with a rocking shaft parallel to the output shaft, and supports the cutting section so that the cutting section can rock between the top dead center and the bottom dead center about the rocking shaft in the direction parallel to a side surface of the cutting blade. The pair of rails extends in the direction intersecting the side surface of the cutting blade.
B27B 9/00 - Scies circulaires portatives à moteur pour travail manuel
B23D 45/04 - Machines à scier ou dispositifs de sciage à lames circulaires ou à disques à friction la lame circulaire ou la pièce à scier étant portée par un levier à pivot
B23D 47/00 - Machines à scier ou dispositifs de sciage travaillant au moyen de lames circulaires, caractérisés uniquement par la structure d'organes particuliers
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B27B 5/20 - Scies circulaires à table à lame circulaire mobile, p. ex. montée sur un chariot la lame étant réglable en fonction de la profondeur ou de l'angle de coupeScies radiales, c.-à-d. machines à scier avec un bras radial pivotant pour le guidage de chariot mobile
Provided is a driving machine configured so that a load acting in the center axis direction on a guide member is reduced. A driving machine for driving a fastener into a member into which the fastener is to be driven is provided with: a movable piston; a driver blade operating with the piston and applying driving force to the fastener; a cylinder 12 for guiding the operation of the piston; a holder 23 provided within a housing 11 and supporting the cylinder 12; and vibration damping rubber 133 disposed between the holder 23 and the housing 11 and subjected to a load acting in the operational direction of the piston on the holder 23.
A power tool is provided such that noise can be reduced at a wide range of rotation speeds. A speed setting dial 62 to be operated by a worker is disposed on a rear end part of a housing 3 of a grinder 1. A control unit controls driving of a motor 6 by setting the rotation speed of the motor 6 in response to the value of a speed setting signal which indicates a value (voltage) corresponding to an amount of rotation of the speed setting dial 62 by the worker. Although the control unit basically causes the rotation speed of the motor 6 to change continuously in response to the rotation amount of the speed setting dial 62, the control unit sets the rotation speed of the motor 6 while avoiding a predetermined rotation speed range in which the noise level is increased due to mechanical and acoustic resonances.
The purpose of the present invention is to obtain a chain saw with which appropriate action can be performed when performing dressing work. An operator operates a throttle lever and by maximizing the extent of said operation, the drive state is initiated, and the crank shaft rotation rate R increases and reaches the maximal value RC thereof. Subsequently, the operator operates the dressing operation lever so as to be in a second state at elapsed time t0 while keeping the extent of the throttle lever operation maximized. Because a microswitch is thereby turned off, the crank shaft rotation rate R is controlled in a range of R1 < R < R2. By placing the saw chain in contact with a grindstone that is fixed to the dressing operation lever simultaneously with said action, dressing work is performed. After the microswitch is turned off at elapsed time t0, the output of an ignition coil is controlled cyclically by a control unit at a cycle T1+T2 so as to be on (ignition) during period T1 and off (flame off) during period T2.
Provided is a driving machine equipped with a cylinder (12) with a piston chamber (14) formed therein partitioned by a piston (13) which drives a driver blade (15), with which easy charging of a compression chamber with compressed air can be achieved without increasing the size of the driving machine. A housing (11) has a cylinder case section (11a) for housing the cylinder (12) and a handle section (11c), and the cylinder (12) is provided with a pressure accumulator (41). The pressure accumulator (41) is provided with a bottom wall section (42), an upper wall section (43), and a compression chamber (45) communicating with the piston chamber (14). A charge valve (71) is disposed on the bottom wall section (42).
In order to provide a driving machine which makes it possible to improve the responsiveness from when an operation for driving in a fastener is performed until when an action member strikes the fastener, a driving machine (10) comprises: a magazine (18) for accommodating fasteners (82); a nose part (16) having an ejection port (17) through which the fasteners (82) are supplied from the magazine (18); a rotating disc (26) for moving a piston (13) between a bottom dead center and a top dead center so as to compress a gas within a cylinder (12); and a driver blade (15) for imparting a driving force to a fastener (82) by the gas compressed by the action of the piston (13). After the driver blade (15) has driven in the fastener (82), a striking part (109) of the driver blade (15) is moved to a standby position (T1) closer to a distal end (16a) of the nose part (16) than a position where a head of the fastener (82) is supplied, until a convexity provided to a rotating body is detected.
Provided is an electric tool in which the risk of short-circuiting between conductive members of multiple installed switching elements has been reduced by providing partitioning plates between the switching elements. An electric tool, which has a motor, an inverter circuit with multiple switching elements for performing switching operations and controlling the driving of the motor, a control unit for controlling switching element on-off operations, and a circuit board on which the switching elements are loaded, is configured so that the circuit board is housed inside a container-shaped case (40) and the circuit board is secured with a partitioning member (50) that is interposed between the multiple switching elements and has partitioning plates (51, 52a, 52b) obtained from an insulating material.
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B24B 23/02 - Machines de meulage portatives, p. ex. à guidage manuelAccessoires à cet effet comportant des outils de meulage rotatifsAccessoires à cet effet
Provided is an electric tool equipped with a brushless motor- and drive circuit-cooling structure. The electric tool comprises a brushless motor, a housing with a motor-housing section for housing the motor, a fan driven by the motor to generate cooling air inside the housing, and a drive circuit for controlling the driving of the motor. The housing comprises an air intake vent, a discharge vent provided near the air intake vent, and an air channel demarcated between the two vents for cooling the brushless motor and the drive circuit using cooling air. The discharge vent and/or the air channel discharges the cooling air discharged from the discharge vent to the outside of the housing in a direction away from the air intake vent.
B23D 47/12 - Machines à scier ou dispositifs de sciage travaillant au moyen de lames circulaires, caractérisés uniquement par la structure d'organes particuliers de l'entraînement de lames de scies circulaires
B23D 59/02 - Dispositifs pour la lubrification ou le refroidissement des lames de scies circulaires
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B27B 9/00 - Scies circulaires portatives à moteur pour travail manuel
Provided is an electric tool for which size increase can be limited and which is capable of stably rotating a distal end tool. The electric tool is characterized in being provided with: a brushless motor (1) with a rotating rotor (1A); a rectifier circuit (71) for rectifying AC voltage; a smoothing capacitor (721) for smoothing the rectified AC voltage to a pulsating voltage; an inverter circuit (73) for outputting the smoothed voltage to the brushless motor by performing a switching operation; and a deceleration mechanism (9) for decelerating the rotation of the rotor and transmitting same to the distal end tool, the deceleration mechanism comprising a rotor-side driving part (94), driven parts (92, 95) for transmitting rotational force to the distal end tool-side, and elastic members (13) for transmitting the rotational force of the driving part to the driven parts.
B23D 47/12 - Machines à scier ou dispositifs de sciage travaillant au moyen de lames circulaires, caractérisés uniquement par la structure d'organes particuliers de l'entraînement de lames de scies circulaires
B27B 5/29 - Machines à scier travaillant avec des lames de scie circulairesOrganes ou équipements ad hoc DétailsMachines à scier travaillant avec des lames de scie circulairesOrganes ou équipements ad hoc Parties constitutivesAccessoires
B27B 9/00 - Scies circulaires portatives à moteur pour travail manuel
The purpose of the present invention is to provide a driver with which changes in impact force when the temperature changes can be limited. The present invention is a driver equipped with a compression chamber (42) provided inside a casing (62), a piston (31) that is provided inside the casing (62) so as to be capable of being operated and is for changing the pressure of the compression chamber (42), and a blade (21) for generating an impact force corresponding to the pressure of the compression chamber (42), wherein: the driver comprises a pressure adjustment chamber (43) provided inside the casing (62), a passage (45) for connecting the compression chamber (42) and the pressure adjustment chamber (43), and a relief valve (44) for opening and closing the passage (45); and the relief valve (44) reduces the pressure of the compression chamber (42) by opening the passage (45) when the pressure of the compression chamber (42) is higher than a prescribed value, and closes the passage (45) when the pressure of the compression chamber (42) is at or below the prescribed value.
The purpose of the present invention is to provide an electric tool to which a plurality of battery packs having different nominal voltages can be alternatively connected, wherein the electric tool can be controlled in accordance with the connected battery pack, by means of an inexpensive and simple configuration, without providing terminals or the like for discriminating between battery packs. The electric tool, to which a plurality of battery packs having different numbers of cells provided inside the battery pack can be connected in an alternative manner, comprises a battery voltage detection unit that detects the battery voltage by using the voltage between the positive electrode terminal and the negative electrode terminal of the battery pack, and a control unit that controls the electric tool in accordance with the nominal voltage of the battery pack on the basis of the detected battery voltage.
Provided is an electric tool in which peak electric current can be controlled without increasing the size of the tool body. In an electric circular saw (100) provided with a motor (1), a rectifying circuit (91) for rectifying AC voltage and outputting same, a smoothing circuit (92) for smoothing the output of the rectifying circuit and outputting same, and an inverter circuit (93) for supplying the output of the smoothing circuit (92) to the motor (1) by performing a switching action, an electrolytic capacitor (921) and a film capacitor (922) that have mutually differing impedances are connected in parallel and disposed in the smoothing circuit (92).
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
H02P 27/06 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs
An engine is configured so that the temperature of exhaust gas discharged from a muffler cover is reduced using cooling air flow for cooling the cylinder. An engine is configured so that a muffler 40 is affixed to the exhaust opening of the cylinder 21, and the air-cooled cylinder is cooled by a cooling fan 25. The engine is provided with a muffler cover 33 for covering the muffler, and exhaust gas EX1 is discharged inside the muffler cover along the wall surface of the muffler. A second cooling air flow CA2 is combined with the exhaust gas flow from the upstream side thereof so as to be substantially parallel thereto, and a first cooling air flow CA1 having been caused to flow under the muffler is caused to perpendicularly impinge against the exhaust gas flow on the downstream side thereof. Thus, the cooling air flows CA1, CA2 are combined inside the muffler cover with the exhaust gas flow, and as a result the temperature of the exhaust gas is sufficiently reduced at the time when the exhaust gas is discharged from the opening 35 of the muffler cover to the outside.
F01N 13/14 - Silencieux ou dispositifs d'échappement caractérisés par les aspects de structure comportant une isolation thermique
F01P 1/02 - Disposition du refroidissement des cylindres ou des hauts de cylindres, p. ex. canalisation de l'air depuis sa source de mise en pression jusqu'aux cylindres ou le long des cylindres
F01P 5/06 - Guidage ou conduite de l'air vers ou depuis les ventilateurs
F02B 63/00 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs
F02B 63/02 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs pour outils tenus à la main
F02B 67/00 - Moteurs caractérisés par l'agencement d'appareils auxiliaires non prévu ailleurs, p. ex. un appareil ayant des fonctions différentesEntraînement non prévu ailleurs de ces appareils auxiliaires par les moteurs
Provided is a hedge trimmer capable of pruning foliage in a manner that will avoid discoloration and drying of foliage caused by heat damage from cooling air but will not decrease work efficiency. The hedge trimmer is provided with: an engine 20 as a power source; a cooling fan 18 disposed on the upper end side of a crankshaft 24 of the engine 20; and a work tool 6 mounted to and extending forward from a power conversion unit 5 disposed on the lower end side of the crankshaft 24. The hedge trimmer is configured such that cooling air 8 generated by the cooling fan 18 cools the engine 20 and flows towards the other end side of the crankshaft 24. The hedge trimmer is provided with an air guide member 10 for guiding the cooling air 8 that has passed the engine 20 to the front.
A01G 3/04 - Appareils à tailler les haies, p. ex. cisailles à haies
F01P 5/06 - Guidage ou conduite de l'air vers ou depuis les ventilateurs
F02B 63/00 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs
F02B 63/02 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs pour outils tenus à la main
F02B 67/00 - Moteurs caractérisés par l'agencement d'appareils auxiliaires non prévu ailleurs, p. ex. un appareil ayant des fonctions différentesEntraînement non prévu ailleurs de ces appareils auxiliaires par les moteurs
The temperature of exhaust gas discharged from a compact air-cooled engine used as a power source for an engine-driven working machine is reduced. An engine has a muffler 50 which is mounted directly to the exhaust opening of the cylinder, and a resin muffler cover 4 which covers the muffler. An exhaust gas restriction member 60 is provided to a wall surface of the muffler, and two exhaust passages 62, 64 serving as outlets for exhaust gas are formed in the exhaust gas restriction member 60. The exhaust passages are arranged independent of each other, and the streams EX1, EX2 of discharged exhaust gas are discharged so as to be slightly separated from each other as the streams EX1, EX2 flow away from the exhaust openings 63, 65. The separated streams EX1, EX2 of discharged exhaust gas form a negative pressure space NP between the streams EX1, EX2, and this promotes the introduction of a cooling air stream CA3 into the negative pressure portion. As a result, the temperature of the exhaust gas can be reduced.
F01N 3/02 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement
F01N 13/20 - Silencieux ou dispositifs d'échappement caractérisés par les aspects de structure ayant des sorties évasées, p. ex. en forme de queue de poisson
F01P 1/06 - Disposition du refroidissement d'autres parties des moteurs ou "machines"
F01P 5/06 - Guidage ou conduite de l'air vers ou depuis les ventilateurs
F02B 63/00 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs
In order to provide an electric tool which is capable of interrupting a power feed from a battery pack to a motor, this electric tool includes: a motor (4); a terminal unit on which it is possible to mount a first battery pack (20) which includes a first battery cell and which outputs an abnormality signal if the first battery cell enters an abnormal state; and a control means (5) which interrupts the power feed to the motor in accordance with the abnormality signal output from the first battery pack mounted on the terminal unit. The control means (5) is capable of interrupting the power feed to the motor (4) irrespective of the presence or absence of the abnormality signal.
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H02H 7/18 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour pilesCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour accumulateurs
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
The purpose of the present invention is to provide a driving machine that fills (pressurizes) the inside of an air pressure chamber with air. The driving machine drives a stopper by the repulsive force of compressed air and comprises: a housing; a cylinder that is provided inside the housing; an air pressure chamber that is spatially connected to the cylinder; a piston that is provided so as to be able to move back and forth inside the cylinder; a blade that is attached to the piston and strikes a stopper; and a moving mechanism that reduces the volume of the air chamber or the inside of the cylinder by using a motor. The driving machine is configured to have a pressure accumulating mode in which the air pressure chamber is pressurized by the motor while being in a state in which the air chamber communicates with the outside and a striking mode in which the piston is caused by the motor to move from a bottom dead point to a top dead point inside the cylinder and then from the top dead point toward the bottom dead point, thereby driving the stopper.
In order to provide a charging device wherein visibility of light emitted from a light emitting section is excellent compared with conventional charging devices, a charging device 1 is provided with a case 3 on which a battery pack 13 is removably mounted, a charge display LED provided in the case 3, and a prism 5 that guides, to the surface side of the case 3, light emitted from the charge display LED, and the prism 5 is protruding to the outer side from the surface of an upper case 3a, and is disposed along a rear-side end of the upper case 3a, said prism having a long and thin shape extending in the horizontal direction. The length L1 of a prism 5 portion facing the outer side of the case 3 is equal to or more than 1/3 of the length L2 of one side of the case 3, said one side being close to the prism portion.
An impact tool is provided in which an on-lock function is achieved using a simple mechanism, and with which switching between activation and deactivation of the on-lock function can be performed in a few operation steps. A hammer drill (1) is provided with at least two operating modes including a hammer mode in which impact force is transmitted to a tip tool, and rotary force is not transmitted. The hammer drill (1) is provided with: a motor (30), i.e. a motive power source; a trigger lever (70) and an on-lock button (80) which are operated by a worker; a sensor (62) for detecting whether the selected operating mode is the hammer mode; and a controller for controlling the motor (30) on the basis of the operation of the trigger lever (70) and the on-lock button (80). If the on-lock button (80) is operated when the hammer mode is selected, the controller implements on-lock control in which the motor (30) is maintained in an operating state even if the trigger lever (70) is not operated.
Provided is an impact tool in which stop control of a motor, i.e. a motive power source for a tip tool, is changed in accordance with prescribed conditions. A hammer drill (1) is provided with at least two operating modes including a hammer mode in which impact force is transmitted to a tip tool, and rotary force is not transmitted, and a hammer drill mode in which at least rotary force is transmitted to the tip tool. The hammer drill (1) is provided with: a motor (30), i.e. a motive power source; and a control unit for implementing stop control for stopping the motor (30). The control unit implements one of at least two types of stop control in accordance with prescribed conditions.
In order to provide an impact work machine capable of increasing the impact force applied from a hammer to an anvil in a rotation direction, an impact work machine is provided with an electric motor, an anvil (27) supporting the work tool and driven by the electric motor, and a hammer (43) that applies an impact force to the anvil (27) in the rotation direction, the impact work machine further comprising: a spindle (40) disposed concentrically with the anvil (27) and supporting the hammer (43) moveably in an axis direction and in the rotation direction with respect to the anvil (27) while transmitting the power of the electric motor to the anvil (27); and a control unit that controls the rotational speed of the electric motor, wherein the number of times the hammer (43) hits the anvil (27) while the hammer (43) makes a single rotation varies in accordance with the rotational speed of the electric motor.
B25B 21/02 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts avec des moyens pour communiquer un choc à la tige du tournevis ou à la douille de la clé à écrou
In order to provide an impact work machine in which oil leakage can be suppressed and in which a power transmission device can be cooled, an impact work machine 10 that transmits the power of an electric motor 16 having an output shaft 17 extending in an axis A1 direction to an anvil 27 comprises: a housing 11 including a motor case 12 housing the electric motor 16 and a grip 14 extending from the motor case 12; a speed reducer 33 and an impact mechanism 96 for transmitting the power of the electric motor 16 to the anvil 27; a hammer case 13 positioned forward of the motor case 12 and incapable of rotating with respect to the motor case 12; an extension portion 12D with which the housing 11 is provided, extending from the motor case 12 toward the hammer case 13 in such a manner as to cover at least a part of the hammer case 13; and a passageway 89 provided between the hammer case 13 and the extension portion 12D allowing the passage of air.
B25F 5/02 - Structure des boîtiers, corps ou poignées
B25B 21/02 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts avec des moyens pour communiquer un choc à la tige du tournevis ou à la douille de la clé à écrou
B25B 23/18 - Dispositifs pour illuminer la tête d'une vis ou d'un écrou
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
To provide a screw tightening device (1) for reliably preventing co-rotation, this screw tightening device (1) comprises: a housing (2); a motor (3) equipped with a rotary shaft part (31) driven to rotate in the forward direction and reverse direction; a distal end tool installation part (5) with which it is possible to install a bit (10) which is rotationally driven to tighten a screw, the distal end tool installation part (5) being capable of moving between a forward position and a rearward position; engaging parts and first protruding parts installed on either the housing (2) or the distal end tool installation part (5); and engaged parts and second protruding parts provided on the other of the housing (2) or the distal end tool installation part (5), wherein the screw tightening device is characterized in that the incline angles of the first protruding parts and the second protruding parts with respect to the rotation axis are designed such that the angles of surfaces on the side of engagement during rotation of the distal end tool installation part (5) in the reverse direction are smaller than the angles of surfaces on the side of engagement during rotation of the distal end tool installation part (5) in the forward direction.
In order to provide a cell pack able to accommodate larger substrate size, while minimizing increase in overall size, an upper case 4 of a cell pack is provided with a latch member 20 for latching the cell pack to a destination device on which the cell pack is to be mounted. The latch member 20 includes a claw part 21 that engages a latch-receiving part of the mounting destination device, an operating part 22 for pushing the latch member 20 towards the inside of the upper case 4, and a linking part 23 linking the claw part 21 and the operating part 22. The linking part 23 is provided with a first recessed part 23a. When the latch member 20 is pushed towards the inside of the upper case 4, a substrate 7 and the first recessed part 23a of the linking part 23 overlap one another, when viewed from a direction perpendicular to the substrate 7.
An electric power tool includes a brushless motor, a control unit configured to control power supply to the brushless motor, a rotary tool configured to be rotated by the brushless motor, a rotation speed detecting unit configured to detect a rotation speed of the brushless motor, a main switch configured to transmit, to the control unit, an ON/OFF signal for switching between driving and stopping of the brushless motor, and a mode switching unit configured to transmit, to the control unit, a mode switching signal for switching between multiple modes of rotation control of the brushless motor, the control unit is configured to perform the rotation control of the brushless motor in any one of the multiple modes including at least a high-speed mode and a low-speed mode.
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B23D 47/12 - Machines à scier ou dispositifs de sciage travaillant au moyen de lames circulaires, caractérisés uniquement par la structure d'organes particuliers de l'entraînement de lames de scies circulaires
B23D 59/00 - Dispositifs annexes spécialement conçus pour les machines à scier ou les dispositifs de sciage
Provided is a self-propelled lawn mower which is configured such that reliable charging of a rechargeable battery thereof in comparison to conventional lawn mowers is possible and which is advantageous in terms of cost savings. The self-propelled lawn mower 1 has a main body 2 with charging terminals 10a, 10b which can be connected to and disconnected from direct current output terminals 51, 52 of a charging base 50. In the self-propelled lawn mower 1, a charging circuit 13 steps up or down a DC voltage of 21 V between the charging terminals 10a, 10b according to the rated output voltage of a rechargeable battery 30 so as to charge the rechargeable battery 30 at a charge voltage compatible with the rated output voltage of the rechargeable battery 30. A control unit 15 receives an identification signal relating to the type (rated output voltage, etc.) of rechargeable battery 30 from a T terminal and controls the charging circuit 13 so as perform a charging operation at a voltage compatible with the rated output voltage of the rechargeable battery 30 when the rechargeable battery 30 is mounted.
In order to provide an electric tool with good operability that can extend the life of and suppress breakage of a switching element for controlling energization of a brushless motor, a control unit (50), after an operation switch (5) is turned off, does not immediately turn off an inverter circuit (43) (does not set the duty of a PWM signal to 0), and instead normally operates the inverter circuit (43) with a low-duty PWM signal and waits until a rotation speed of a brushless motor (6) reaches a predetermined rotation speed or less to turn off the inverter circuit (43) (to set the duty of the PWM signal to 0).
In the present invention, the size of an electric tool is reduced by providing a large radiating means to a switching element and efficiently arranging the radiating means and the switching element in a grip part of a housing. An electric tool having: a brushless motor 5; a cooling fan 10; a housing 2 for accommodating the motor 5 and the cooling fan 10, the housing 2 extending in a rotational axis direction; a control board 31 arranged so as to intersect with the axial direction; and a switch 7 for switching rotation of the motor on or off; wherein a plurality of switching elements 33, 35 for controlling conduction of electricity to the motor are arranged between the switch and the control board, and a shared heat sink 40 in contact with the plurality of switching elements is provided. The heat sink is a thick plate made of a light metal and is arranged so as to extend in the rotational axis direction in a direction orthogonal to the control board, and the switching elements are fixed to one side and the other side of the heat sink.
In order to provide an electric tool whereby appropriate discharge control can be performed for each of battery packs having different battery types, the present invention is provided with a first battery pack, a second battery pack having a smaller capacity than the first battery pack, a battery connection part to and from which the first battery pack or the second battery pack can be attached and detached, a motor driven by electric power from the battery pack, an electric current detection means for detecting a discharge electric current flowing to the motor from the battery pack, a cutoff control means for cutting off the discharge electric current when the discharge electric current is equal to or greater than an electric current threshold value, and a battery type distinguishing means for distinguishing the battery pack connected to the battery connection part, the electric current threshold value for a case in which the second battery pack is connected being smaller than the electric current threshold value for a case in which the first battery pack is connected.
An impact tool which transmits an impact force to a tool bit supported by a casing includes: a cylinder which is attached to the casing and has an opening on one end side thereof to which the tool bit is inserted; an intermediate element which is provided in an inside of the cylinder so as to be able to move straight, has a projection projecting in a radial direction so as to regulate a range of the straight movement, and transmits the impact force to the tool bit; and passages and which communicate a space in an inside of the cylinder at a position nearer to the tool bit than the projection with the outside of the cylinder and penetrate through the cylinder in the radial direction.
Provided is an easy-to-use electric tool with which braking force can be changed according to work conditions. When an operation switch 5 is turned off, a control unit 50 detects a rotation rate R1 of an electric motor 6. The control unit 50 stands by for a prescribed period, detects a rotation rate R2 of the electric motor 6, and calculates the difference between the rotation rates R1, R2 (R=R1−R2). Since the rotation rate difference R corresponds to the rate of change in rotation rate with time during deceleration of the electric motor 6 and is smaller the larger the moment of inertia of the attached rotary tool, the control unit 50 can determine the moment of inertia of the rotary tool on the basis of the rotation rate difference R. The control unit 50 sets the braking force according to the moment of inertia and performs braking.
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B24B 23/02 - Machines de meulage portatives, p. ex. à guidage manuelAccessoires à cet effet comportant des outils de meulage rotatifsAccessoires à cet effet
Provided is a jackhammering operation machine with which it is possible to execute control according to operating conditions. This jackhammering operation machine (10) converts rotary force of a brushless motor (30) to jackhammering force which is applied to a distal end tool, and has a motor control unit (133) for detecting whether a distal end tool is being pressed against an object during rotation of the brushless motor (30), and a motor control unit (133) that, when pressing of the distal end tool against an object is detected continuously for a prescribed time, performs speedup control to increase the rotation speed of the brushless motor (30).
B25D 11/04 - Outils portatifs à percussion entraînés par moteur électrique dans lesquels la tête de l'outil ou l'enclume est frappée par une pièce en mouvement
B25D 16/00 - Machines portatives à percussion avec rotation superposée
In order to provide an electric work machine capable of suppressing performance decrease due to an input voltage decrease, a control circuit 81 performs fixed-duty control of a motor 10 after soft-start control of the motor 10. The control circuit 81 samples the rotational speed of the motor 10 while performing the fixed-duty control; determines whether, on the basis of a plurality of times of sampling results, the rotational speed is lower than a target; and, if lower than the target, increases the duty of a PWM signal applied to FETs Q1 to Q6 in an inverter circuit 85 compared with the fixed-duty control, so as to increase the rotational speed of the motor 10.
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B25B 21/02 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts avec des moyens pour communiquer un choc à la tige du tournevis ou à la douille de la clé à écrou
Provided is an electric work machine capable of suppressing temperature increase in components for controlling an electric motor. An electric work machine provided with a brushless motor for operating a tip tool is provided with: a rectification circuit 53 for converting a voltage applied to the brushless motor from AC to DC; and a switching circuit 121 for controlling the brushless motor, wherein, in a circulation path D1 for air for cooling the rectification circuit 53 and the switching circuit 121, the rectification circuit 53 is disposed more upstream than the switching circuit 121.
The purpose of the present invention is to provide an electrically powered device that can stably control a motor in a sensorless-driving scheme. An electrically powered device of the present invention comprises: a motor that has a rotor and a stator which has a winding; an induced voltage detection means that detects an induced voltage generated in the winding; and a motor control means that controls the motor on the basis of the induced voltage. The induced voltage detection means includes: a digital signal outputting means that outputs a digital signal that corresponds to the induced voltage to the motor control means; and an analog signal outputting means that outputs an analog signal that corresponds to the induced voltage to the motor control means.
In order to provide a powered working machine with which the transmission of vibrations from a housing to a control substrate can be suppressed, this electric working machine 10, which operates a distal tool using power from a brushless motor 30, is configured to have: a control substrate 71 that controls the brushless motor 30; a substrate case 82 that accommodates the control substrate 71; a motor housing 20 and cover 160 that support the substrate case 82; an elastic body 152 that is disposed between the substrate case 82 and the motor housing 20; and an elastic body 153 that is disposed between the substrate case 82 and the cover 160.
In order to provide an electric device equipped with an easily openable/closable compact lid, a portable radio 1 is provided with: a housing 2 having a body part 2A having an adapter accommodation part 9 in which an adapter 8 connectable to an external power supply can be accommodated and a battery accommodation part 7 in which a battery 6 can be accommodated and which is provided at a position different from the adapter accommodation part 9, and a lid part 2B with which it is possible to open and close the adapter accommodation part 9 and the battery accommodation part 7; an adapter connection part 21, provided in the body part 2A, with which it is possible to connect the adapter 8; and a speaker 23 made to operate by the battery 6 being accommodated in the battery accommodation part 7 or the adapter 8 being connected to the external power supply or the adapter connection part 21.
In order to reduce idle time during charging, this charging device, for which a battery pack 2 in which a ventilation hole 2b is formed can be attached and removed, is characterized by having: a control substrate 5; a housing 3 accommodating the control substrate 5 and in which a ventilation hole 3a is formed so as to be capable of opposing the ventilation hole of the battery pack; and a cooling fan 6 that is provided in the housing, is capable of ventilating the control substrate and the ventilation holes, and is capable of operating when the battery pack is not attached.
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H01M 10/46 - Accumulateurs combinés par structure avec un appareil de charge
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H01M 10/613 - Refroidissement ou maintien du froid
H01M 10/617 - Types de commande de la température pour réaliser l'uniformité ou une répartition désirée de la température
H01M 10/637 - Systèmes de commande caractérisés par l’emploi de dispositifs sensibles à la température, p. ex. dispositifs NTC, PTC ou bimétalSystèmes de commande caractérisés par la commande du courant interne circulant à travers la batterie, p. ex. par commutation
The purpose of the invention is to provide both a power tool that can be equipped with a battery pack with a minimized total length (front-to-back dimension) as well as such a battery pack, or both a power tool that can be equipped with a compact and high capacity battery pack as well as such a battery pack. This power tool battery pack comprises a plurality of cells and a battery case housing the plurality of cells, each of the plurality of cells having a diameter of 16 mm and a capacity of 2.5 Ah, and all of the cells being electrically connected in series and housed in the battery case in such a manner as to be arranged in the front-to-back direction. The power tool uses this battery pack.
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H01M 10/613 - Refroidissement ou maintien du froid
Provided is a portable cleaner with which bulkiness of the motor case in the diametrical direction centered on the axis of the electric motor can be minimized. This portable cleaner is provided with a motor case (12) housing an electric motor (16), and a dust collection fan (25) located inside the motor case (12) and rotated by power from the electric motor (16); and has a motor holder (46) which supports the electric motor (16), and a protruding part (54) provided to the motor holder (46), the protruding part (54) engaging with the motor case (12) and being positioned at a location different than the dust collection fan (25) positioning location, in the direction of the axis (A1) of the electric motor (16).
Provided is an impact tool having an increased tightening speed obtained without increasing the size of the tool body. An impact driver (1) has: a motor (3); a hammer (6) rotationally driven by the motor (3); and an anvil (7) having a front end tool mounting section (72) to which a front end tool is mounted, the anvil (7) being rotated in the rotational direction of the hammer (6) by impact from the hammer (6). Impact imparting surfaces (62a, 62b) tilting in the rotational direction of the hammer (6) as the impact imparting surfaces (62a, 62b) extend toward the front end tool are provided on the side which comes into contact with the anvil (7) in the rotational direction, and impact receiving surfaces (73a, 73b) tilting in the rotational direction as the impact receiving surfaces (73a, 73b) extend toward the front end tool are provided on the side which comes into contact with the hammer (6) in the rotational direction of the anvil (7).
B25B 21/02 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts avec des moyens pour communiquer un choc à la tige du tournevis ou à la douille de la clé à écrou
A centrifuge having a plurality of buckets (40) that are provided in a swingable manner by being latched to the holding pins of a swing rotor body in order to ensure sufficient width of contact between the convex parts of the holding pins and the concave parts of the buckets and to optimize the size of a chamfer or roundness provided to the convex parts of the holding pins, wherein the holding pins are convex parts protruding from the swing rotor body and have a cylindrical surface on the outer periphery, the buckets have concave parts corresponding to the convex parts, and the concave parts include an arcuate pin-receiving part (44) that presses against the convex parts of the holding pins during swinging, and an orthogonal surface (45) that faces the axially distal surface of the convex parts, a continuous groove part (46) being formed in a reverse U-shape in side view on the outside of the orthogonal surface (45). The groove part (46) has a hemispherical groove cross-section, and the axis of the holding pin passes above the orgthogonal surface. Forming the groove part (46) makes it possible to disperse the localized stress concentrated on corner sections, etc., and to increase the service life of the bucket (40).
Provided is a dust collector that can provide suitable brightness in the dark. A head unit (20) has a transparent cover (35) near an operating unit (30), and multiple LEDs (36) are provided in the rear of the transparent cover (36) as illuminating units. The multiple LEDs (36) are arranged on a single illumination substrate (37) and parallel to the upper surface of the head unit (20). The illumination substrate (37) is disposed inside the head unit (20) so as to be closer to vertical than the transparent cover (37) when the dust collector (1) is disposed on a horizontal plane. The LEDs (36) project light to the front of a hose attaching port (11).
In order to provide a motor drive circuit and an electric tool that are capable of monitoring, in each switching element constituting an inverter circuit, the voltage of control terminals more accurately than has been conventionally possible, an inverter circuit 85 has three-phase bridge-connected FETs Q1-Q6. Selection circuits 86, 87 select gate voltages for FETs that are currently ON among FETs Q1-Q6 and provide feedback to a calculation unit 83. Output voltages for the selection circuits 86, 87 are each divided by voltage-division resistances R1, 2 and voltage-division resistances R3, R4, are DC converted by DC conversion circuits 88, 89, and are entered into the calculation unit 83. The calculation unit 83 takes into account the current PWM control duty and determines whether or not the gate voltages for FETs Q1-Q6 are within the normal range, on the basis of the input voltages from the DC conversion circuits 88, 89.
In order to provide a drive-in machine in which less recoil is generated in a drive-in machine body, this drive-in machine 1 has: a nose part 3 provided to a housing 2 so as to extend in the lengthwise direction, the nose part 3 being capable of discharging a fastener; a plunger 7 that moves in an impact direction parallel to the lengthwise direction and impacts the fastener via the nose part 3; a weight 8; and a coil spring 9 that is compressed in the lengthwise direction by a motor 5, the coil spring 9 moving the plunger 7 in the impact direction through release from compression, and moving the weight 8 in a counter-impact direction away from the plunger 7. The coil spring 9 is positioned between the plunger 7 and the weight 8, such that one end urges the plunger 7, and the other end urges the weight 8.
The purpose of the present invention is to reduce the temperature of exhaust gas using a simple structure, and to enable a reduction in the size of a muffler cover. The flow direction of exhaust gas discharged rightward from an exhaust-gas outlet hole (43) is changed so as to be rearward by an exhaust-gas restriction member (50), and the exhaust gas passes through an outflow port (44B) and is discharged at the rear of a muffler cover (44). A guide plate (54) is provided to the rear of the exhaust-gas restriction member (50). The guide plate (54) extends so as to protrude further rearward than the rear end of a muffler (40), and serves as a guide for the exhaust gas flowing rearward. The guide plate (54) is bent to the left side in fig. 2, and is set such that an extended line of the guide plate (54) is further outward than a cover inner side surface (44C). As a result of the guide plate (54), the exhaust gas discharged at the rear of the muffler cover (44) flows away from a cover outer side surface (44A).
F02B 63/00 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs
A01D 34/68 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur
F01N 13/20 - Silencieux ou dispositifs d'échappement caractérisés par les aspects de structure ayant des sorties évasées, p. ex. en forme de queue de poisson
F02B 63/02 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs pour outils tenus à la main
Provided is an electric working machine in which a control board can be disposed without being restricted by the length of a brushless motor in the axial direction. As an electric working machine having a brushless motor 30 provided with a rotor 32 and a stator 31, a motor case 27 accommodating the brushless motor 30, and a motor housing, the working machine comprises: a control board 71 which is provided outside the motor housing 20 in the radial direction with an axis line B1 of the rotor 32 as the center and supports a switching element; a connection board 47 provided inside the motor case 27 and supporting sensors S1-S3; a hole part 90 passing through the inside and outside of the motor case 27; a hole part 89 passing through the inside and outside of the motor housing 20; lead wires 58, 60, 62, 64, 65, 67 disposed from the inside of the motor case 27 to the outside of the motor housing 20 through the hole parts 89, 90; and a signal line 75.
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B25D 11/04 - Outils portatifs à percussion entraînés par moteur électrique dans lesquels la tête de l'outil ou l'enclume est frappée par une pièce en mouvement
B25F 5/02 - Structure des boîtiers, corps ou poignées
H02K 11/00 - Association structurelle de machines dynamo-électriques à des organes électriques ou à des dispositifs de blindage, de surveillance ou de protection
Water (200) is jetted from a jetting port (13) provided on the end of an intra-nozzle water channel (12). A plate spring (14) in which a plate spring (first restricting member) (14A) and a plate spring (second restricting member) (14B) are united is mounted on a nozzle base (11). At the edge of the upper plate spring (14A) on both sides of the jetting direction (I) of the water (200), projections (14E, 14F) that protrude downward are respectively formed. By the projections (14E, 14F) coming in contact with the lower plate spring (14B), a gap of an interval (D) is formed between the projection (14E) and the projection (14F) and between the plate spring (14A) and the plate spring (14B). Because said gap is formed regardless of the pressure of the water (200) jetted from the jetting port (13), water (200) is jetted from said gap even when water pressure is low. Consequently, it is possible to stably perform operations to increase jetting angle, etc. even when water (liquid) pressure is low.
B08B 3/02 - Nettoyage par la force de jets ou de pulvérisations
B05B 1/12 - Buses, têtes de pulvérisation ou autres dispositifs de sortie, avec ou sans dispositifs auxiliaires tels que valves, moyens de chauffage capables de produire différents types d'écoulements de sortie, p. ex. sous forme d'un jet ou d'un pulvérisat
The present invention reduces the volume inside a crankcase and improves scavenging efficiency with a simple structure. When a piston 11 is bottom dead center, a crankcase first projection 20A in which the inner face of a crankcase 20 projects toward the interior and penetrates a cutout portion toward the interior is formed in a place corresponding to the cutout portion on the piston 11. Meanwhile, the crankcase 20 at a place that corresponds to a place in which the cutout portion is not formed on the piston 11 does not project toward the interior. The piston 11 can be reciprocally moved vertically without interfering with the crankcase 20 by way of assembling the piston 11 and the crankcase 20 of this form. In this case, the volume inside the crankcase 20 can be reduced by providing the crankcase first projection 20A.
A01D 34/68 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur
F02B 25/16 - Moteurs caractérisés par l'utilisation d'une charge neuve pour balayer les cylindres utilisant le balayage à flux inversé, p. ex. avec les orifices d'admission et d'échappement disposés près du point mort bas de la course du piston la charge s'écoulant vers le haut, pratiquement le long de la paroi du cylindre opposée aux orifices d'admission
F02B 63/02 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs pour outils tenus à la main
F02F 1/22 - Autres cylindres caractérisés par la présence de lumières dans les parois du cylindre pour le balayage ou l'alimentation
F02F 3/24 - Pistons comportant des moyens pour guider les gaz dans les cylindres, p. ex. pour guider la charge de balayage dans les moteurs à deux temps
F16J 1/09 - PistonsPistons à fourreauPlongeurs comprenant des moyens de guidage des fluides
A substantially safer chainsaw is provided in which the side cover cannot be removed or mounted unless a brake lever has been moved to the brake position. This chainsaw has a side cover provided which covers a sprocket, and only when the brake lever (20) is in the brake position can the side cover be attached to or removed from the housing. An engagement portion (51a) is provided in the side cover, an engaging piece (20a) is provided in the brake lever, and movement of the engaging piece accompanying movement of the brake lever brings the engagement portion and the engaging piece into an engaged or disengaged state. Furthermore, a locking means (34) is provided which, in a state in which the side cover has been removed, prevents the brake lever from moving from the brake position (20') to the release position (20).
An impact tool is provided with sloped sections (50) between a wall section (30c1) provided between a pair of hammer cams (30a1, 30a2) along the circumferential direction of a through hole (30c) and a bottom section (30c2) provided at the middle of the pair of hammer cams (30a1, 30a2) along the circumferential direction of the through hole (30c), in order to reduce a galling phenomenon between an impact member and a rotating member even when a boring force is applied to the impact tool. The dimension of the sloped section (50) in the axial direction of the through hole (30c) is smaller than the dimension of the wall section (30c1), and the dimension of the sloped section (50) in the axial direction of the through hole (30c) is greater than the dimension of the bottom section (30c2). A spindle is pressed against the sloped section (50) when a first pawl (18d1 (18d2)) and a second pawl (30e1 (30e2)) are engaged with each other.
B25B 21/02 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts avec des moyens pour communiquer un choc à la tige du tournevis ou à la douille de la clé à écrou
An electric tool is provided which prevents anomalies in motor rotation due to dust and moisture sucked in together with cooling air, and which is configured such that rotational position detection operations and switch operations are not affected. In this electric tool which drives a brushless DC motor using a controller, a magnetic body (14) for rotational position detection is provided on a rotation shaft (10) which can rotate integrally with a rotor (7), Hall ICs (41 to 43) are provided which detect the rotational position of the magnetic body and output a position signal to the controller, and the magnetic body (14) and the Hall ICs (41 to 43) mounted on a substrate (44) are arranged inside of a region isolated from the path of the cooling air generated by rotation of a cooling fan. The Hall ICs (41 to 43) are housed inside of a casing (61) filled with a resin.
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B24B 23/02 - Machines de meulage portatives, p. ex. à guidage manuelAccessoires à cet effet comportant des outils de meulage rotatifsAccessoires à cet effet
B24B 49/10 - Appareillage de mesure ou de calibrage pour la commande du mouvement d'avance de l'outil de meulage ou de la pièce à meulerAgencements de l'appareillage d'indication ou de mesure, p. ex. pour indiquer le début de l'opération de meulage impliquant des dispositifs électriques
An electric tool is provided which has a more compact switching structure with durability increased by elimination of contact points. This electric tool comprises a controller which controls power supply to the motor in response to operation of a switch lever which turns rotation of the motor ON and OFF. The electric tool comprises a magnetic body (53) provided on a movable arm (52) which is moved by means of a switch lever (51), and a first and second magnetic detection means (Hall ICs (55, 56)) provided adjacent to the range of motion of the magnetic body. The first magnetic detection means (55) detects the approach of the magnetic body when the switch lever is in the motor OFF position, and the second magnetic detection means (56) detects the approach of the magnetic body when the switch lever is in the ON position. The controller uses the two detection results to determine the switch lever position. The magnetic detection means (55, 56) are housed inside of a casing (61) which is isolated from a cooling airflow path.
B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
B24B 23/02 - Machines de meulage portatives, p. ex. à guidage manuelAccessoires à cet effet comportant des outils de meulage rotatifsAccessoires à cet effet
In order to increase screw fastening speed and improve work efficiency, three first claws (30e) of a hammer (30) and three second claws (18d) of an anvil (18) are provided, thereby making it possible to set a striking interval to "a 120-degree interval" that is shorter than in the prior art. The working efficiency can be improved by sufficiently accelerating a rotor (12b) and a spindle (26) by setting total inertia obtained by adding up the inertia of the rotor (12b) and the inertia of the spindle (26) to a low value less than or equal to "300 kg·mm2" in terms of a rotary shaft of the spindle (26).
B25B 21/02 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts avec des moyens pour communiquer un choc à la tige du tournevis ou à la douille de la clé à écrou
Provided is a driving machine that performs driving only when a push lever and then a trigger lever are in an ON position. A driving machine that has a sleeve valve that drives a driver blade. A trigger valve (51) controls the supply and release of compressed air to and from the sleeve valve. The trigger valve (51) has: a valve piston (61) that can move between an air-supply position wherein an opening part (54) and a connection port (56) are connected and an exhaust outlet (55) is blocked and an exhaust position wherein the opening part (54) is blocked and the exhaust outlet (55) and the connection port (56) are connected; and a plunger (67) that can move between a connected position wherein compressed air that is inside an accumulator is supplied to a pressure chamber (56) and a cut-off position wherein the connection between the accumulator and the pressure chamber (66) is cut off and air inside the pressure chamber (66) is discharged. When a trigger (41) and a push lever (44) are in a strike interruption position, the plunger (67) is driven into the connected position by a trigger arm (76).
brevets
