Abstract: An all terrain vehicle comprising a V-belt continuously variable transmission and a gear-type transmission, being capable of transmitting drive torque from an engine with controlled engine braking but without loss of the torque, thereby giving a rider an improved driving feel. The V-belt continuously variable transmission and the gear-type transmission are placed in this order from upstream in a power transmission path from the engine to wheels. A one-way clutch for transmitting only the drive torque from the engine to the wheel and a torque limiter for transmitting the torque less than a predetermined value are arranged in parallel, between, e.g., a countershaft and forward intermediate gears fitted onto the countershaft.

Abstract: A planetary gear reduction device with a torque limiter function includes a housing, an input shaft rotatably supported by one end of the housing and connected to a power source so as to input a torque from the power source, an output shaft rotatably supported by the other end of the housing so as to output the torque from the power source, a reduction gear train provided between the input shaft and the output shaft and constituted of a plurality of gears meshing with one another, and a torque limiting mechanism mounted in the reduction gear train. In this device, when an excessive torque is generated in the output shaft, torque transmission from the input shaft to the output shaft is disconnected by the action of the torque limiting mechanism.

Abstract: A clutch arrangement for a power tool having a multi-speed transmission. The clutch arrangement includes a clutch member and a follower member. The clutch member is coupled to a member of the transmission that is proximate the torsional input of the transmission and which must be in a non-rotating position to permit the transmission to perform a torque multiplication operation. The follower member is biased into engagement with the clutch member to inhibit relative rotation therebetween. As the clutch member and the transmission member are coupled to one another, the transmission is able to perform a torque multiplication operation. When, however, the torsion that is exerted onto the clutch member is sufficient to overcome the frictional engagement between the follower and clutch members, the clutch member, and the transmission member, rotate, thereby inhibiting the capability of the transmission to continue to perform the torque multiplication operation.

Abstract: A geared rotary actuator comprising first and second reduction gear trains, an earth for fixing the actuator in use, and an output member moveable relative to said earth for connection to a component to be moved by the actuator, said first and second reduction gear trains each including a respective rotary input member and a respective output, said first and second gear train input members being arranged in use to be driven by respective sources of rotary movement and said gear trains having fixed, equal, step-down gear ratios between their input and output, and, the actuator farther including output summing means interconnecting said outputs of said first and second gear reduction trains with said output member of the actuator whereby movement of said output member relative to said earth in response to rotation of said gear train input members is the sum of the movements of said gear train outputs.

Abstract: A starter motor for cranking an internal combustion engine includes an electric motor, a planetary gear device for reducing a rotational speed of the electric motor, and a shock-absorbing device that absorbs excessive impact transmitted from the engine to the starter motor. The planetary gear device has an annular member contacting a separating plate that separates the planetary gear device from the electric motor. A depressed portion such as a circular groove is formed on an axial end surface of the annular member. Lubricant retained in the depressed portion lubricates the end surface that rotates relative to the separating plate to absorb the excessive impact transmitted from the engine, and thereby abrasion wear of the end surface is suppressed.

Abstract: A drive assembly is operable to move control surfaces on wings of an aircraft. The drive assembly may include a gear reduction assembly which is driven by a pair of motors. The drive assembly has output members which are connected with the control surfaces on the wings of the aircraft. Torque limiting brake assemblies are operable between an engaged condition in which they are effective to prevent rotation of output members and a disengaged condition in which the brake assemblies are ineffective to prevent rotation of the output members. Actuator assemblies are connected with the torque limiting brake assemblies. The actuator assemblies are operable to effect operation of the torque limiting brake assemblies from a disengaged condition to an engaged condition in response to transmission of predetermined torques through the actuator assemblies to the output members.

Abstract: A switch gear with at least two gear stages is provided. At least one gear stage is configured as a switching stage, whereby at least one switching stage is formed by a coaxially nonrotatable sunwheel on a drive shaft, by at least one planet carrier carrying one planet wheel and by at least one ring gear meshing with the planet wheel on the inside, which is held fixed in its housing, and by a cam disk for the actuation of switching elements. The cam disk is provided with a female spline which exhibits approximately the identical pitch circle diameter as the female spline of the ring gear, whereby the female spline of the cam disk exhibits a number of teeth different from the female spline of the ring gear and whereby the cam disk, by means of the female spline, meshes with at least one planet wheel of the switching stage. The switch gear may be used, for example, as a limit switch of cranes.

Abstract: An electrohydraulic control unit for operating an actuator of a hydraulically controllable device is disclosed. The electrohydraulic control unit comprises a housing including a chamber for hydraulic fluid. The housing is coupled to the actuator such that a path for fluid communication between the chamber and the actuator is created. Disposed within the chamber is a piston for regulating the flow of the hydraulic fluid between the chamber and the actuator. An electric motor is securably attached to the housing. The electric motor includes a selectively rotatable shaft. The electrohydraulic control unit also comprises a converter configured to transform the rotational motion of the shaft to translational motion of the piston, thereby controlling the actuation of the hydraulically controllable device.

Abstract: A rotation transmission device mounted on a 4WD car can stop the front drive train during 2WD mode, and also permits smooth changeover from 2WD to 4WD even while the vehicle is moving. The rotation transmission device is mounted in a transfer which transmits the output of the engine transmission to the rear propeller shaft through an input shaft and to the front propeller shaft through a silent chain. The rotation transmission device includes a two-way clutch through which the rotation of the input shaft is selectively transmitted to a chain sprocket, an electromagnetic clutch for selectively locking and unlocking the two-way clutch, and a multiple disk clutch provided between the two-way clutch and the electromagnetic clutch to function as a synchronizer that permits smooth mode change from 2WD to 4WD even while the vehicle is moving.

Abstract: An automatic transmission (30) for a power tool includes reduction gearing (42-58) coupled between a motor (24) and an output member (28). A mechanism for adjusting speed (60) of the output member (28) is coupled with the reduction gearing (42-58). The mechanism for adjusting speed (60) is slidably biased such that upon change in torque, the mechanism for adjusting speed (60) moves which, in turn, engages and disengages the reduction gearing (42-58) to vary the speed of the output member (28) between a first and second speed.

Abstract: To reduce the size of a starter for installing it in a smaller engine compartment, the rotational speed of the starter motor has to be high and it is reduced to a certain speed through a reduction device to obtain a higher torque. To realize a high reduction ratio in a small planetary gear reduction device, an impact force imposed on the device at an instant a starter pinion engages with a engine ring gear and repeating impacts during a cranking period must be reduced. As a coupling between an internal gear and a housing of the reduction device, a flexible or a resilient coupling is disclosed herein. The flexible or resilient coupling relieves an excessive impact force at the engagement by permitting rotation of the internal gear relative to the housing, and reduces noise caused by the cranking impacts by permitting a small vibrating move of the internal gear. The flexible coupling is realized by a combination of a bumpy surface and projections coupled thereto.

Abstract: In a one-way clutch used in a starter for engines, a locking concave for locking a roller thereto is formed on a roller-moving surface of one clutch member having a peripheral surface facing a peripheral surface of the other clutch member having a wedge-shaped groove for accommodating the roller. A resilient member for disengaging the roller from the locking concave at the time of overrunning is accommodated in an annular groove, thus urging the roller radially outwardly. The roller is prevented from colliding with the locking concave at the time of overrunning so that vibrations and noise are not generated.

Abstract: A jam-tolerant geared rotary actuator, capable of performing in a normal operating mode and a jam-tolerant operating mode, which includes: an output spline member for releasably connecting the movable ring gear to the output ring; a decoupling member which includes an input shaft disposed within a hollow timing shaft, and a shear member for sensing excessive torque and initiating the jam-tolerant mode; a sun gear spline member for connecting the sun gear to the hollow timing shaft; an axial displacement member for engaging the output spline member with the movable ring gear and the output ring; and an input engagement member for releasably connecting the axial displacement member to the input shaft. The axial displacement member includes a decoupling bushing and a double threaded decoupling nut. The nut is disposed between the timing shaft and the decoupling bushing.

Abstract: A planetary gear transmission gear system comprises a main planetary gear train composed of a main sun gear, a main ring gear, and main planet gears. The main sun gear is driven by an input rotary shaft to rotate. A sub planetary gear train is included to have a sub sun gear, a sub ring gear, and sub planet gears, and has a different gear ratio from the main planetary gear train. The sub sun gear is connected to rotate together with the main sun gear. A common carrier supporting the main and sub planet gears is rotatable about a common center axis and is drivingly connected to rotate an output shaft. A lock mechanism releasably fixes the main ring gear in order to allow the main planet gears to rotate about the center axis as the main sun gear rotates with the main ring gear fixed. A one-way clutch is connected to permit the sub ring gear to rotate in a first direction and to prohibit the sub ring gear from rotating in a second direction opposite to the first direction.

Abstract: A reaction containment drive apparatus for a power tool includes a motor having an outside case free to rotate within the tool casing, and an internal drive shaft. A planetary gear set is an integral portion of the drive. It has three parts, namely, a central sun gear part, a middle planet gear part (the planet gear part having a planet carrier and preferably three planet gears on the planet carrier), and an outside ring gear part coaxial with the sun gear part and the planet carrier. The planet gear part is rotatable between the sun gear part and the ring gear part.

Abstract: A two-speed power transmission for a power tool comprises a housing (10), an input shaft (20), an output shaft (15), a planetary gear (18) and a torque responsive gear shift mechanism (19) for directing torque through the planetary gear (18) in a high torque/low speed drive mode or past the planetary gear (18) in a low torque/high speed drive mode. The gear shift mechanism (19) comprises a driving member (26) connected to the sun wheel (21) of the planetary gear (18), a driven member (27) connected to the output shaft (15), and a number of axially movable coupling elements (30) arranged to intercouple in a first position the driving member (26) and the driven member (27) and intercouple in a second position the planet wheel carrier (24) of the planetary gear (18) and the driven member (27). The coupling elements (30) are continuously supported in the radial direction by an axially extending coupling sleeve (28) formed in one piece with the planet wheel carrier (24).

Abstract: A rotation transmission device with a torque limiting function comprises a cylindrical housing 10, a first rotation member 20 supported on a first bracket 12 via a one-way clutch bearing 14, a second rotation member 30 integral with the output shaft 33, an annular torsional resilient member 80, and an input shaft 40 rotatably supported on the rotation members 20 and 30. The torque is transmitted from the input shaft to the first rotation member via a torque limiting transmission mechanism which comprises: a first and a second internal gear 21 and 31, a first sun gear 41 supported on the input shaft 40 via a one-way clutch bearing 42, a second sun gear 43 fixed on the input shaft, first and second planetary gears 55 and 65, satellite rings 58 and 68 eccentric to the planetary gears 55, and a guide disk 70 having guide slots 72 slidably engaging with the satellite rings 58 and 68.

Abstract: A geared rotary actuator (1) including planet gears (2) disposed around a shaft (S), sun gears (8, 9) meshing with the planet gears (2) and with axially displaceable ramp members (10, 11) splined to the shaft (S) at least a pair of ball members (13, 14) are accommodated in pockets formed between the respective ramp members (10, 11) and a further member (12). Ramp surfaces (11a, 11b, 12a, 12b, 10a, 10b) are provided at the respective pockets to enable the ball members (13, 14) to ride out of the pockets upon an occurrence of an excessive torque thereby axially displacing the respective ramp members (10, 11) against a bias of springs (15, 16) coupled to the sun gears (8, 9) through planet gear radial support members (4) integrally formed with the sun gears (8, 9) thereby disconnecting a torque path through the actuator (1).

Abstract: A rotary electric tool in which a differential gear mechanism is mounted within a gear case fixed to a housing for example; projections are formed on the outer peripheral surface of an internal gear of a final planetary gear mechanism in the differential gear mechanism, the said projections being brought into engagement with a projection-formed surface of a torque adjusting cam; the internal gear and the torque adjusting cam can be changed in relative position axially by reaction force of the internal gear; and the rotation of an output shaft is changed over between high and low speed conditions according to an axial displacement of the internal gear.