Provided is a clutch unit (1) including: a static system (housing (40)); an output shaft (30); a first clutch part (10); and a second clutch part (20). The first clutch part (10) includes: an input rotary body including an inner ring (13); an output rotary body including an outer ring (14); and a plurality of cylindrical rollers (15) disposed therebetween. The clutch unit (1) includes: a rotation suppressing member (70) configured to apply rotational resistance to the output rotary body of the first clutch part (10); and rotation stopping mechanisms (80) (recessed portions (71) of the rotation suppressing member (70) and extending portions (41) of the housing (40)) configured to restrict rotation of the rotation suppressing member (70) with respect to the housing (40).

A rotation transmission device includes an electromagnetic clutch including an armature, a rotor having an outer tubular portion and an inner tubular portion, and an electromagnet. A bearing support tube is provided at the outer end surface of a core supporting an electromagnetic coil of the electromagnet. A bearing is mounted in the bearing support tube so as to be axially fixed in position and not to be pulled out of the bearing support tube. The small-diameter tubular portion is provided at the end of the inner tubular portion of the rotor, and press-fitted in the bearing such that the rotor and the electromagnet form a unit.

An object of the present invention is to provide a positive clutch that has a high rigidity and simple structure, reduces friction loss, prevents noise generation, allows a size reduction, and helps extend a service life. The object is achieved by the following configuration: Roller support parts are formed on one of an outer circumferential surface of the inner race and an inner circumferential surface of the outer race, and pocket parts are formed on the other one of the inner race and outer race. The clutch is configured to stop relative rotation of the inner race and outer race by holding the rollers, which are disposed between the inner race and the outer race, between the roller support parts and pocket parts in the circumferential direction.

A reversible wrench includes a handle and a carrier arranged on the handle. A torque transmission assembly is arranged in the carrier. The assembly includes an inner driven member having an inner, outwardly facing bearing surface and an outer driving member having an outer, inwardly facing bearing surface, the driven and driving members being arranged in the carrier about a common rotation axis and the surfaces being spaced from each other. A selector is positioned between the bearing surfaces. At least one motion transfer device is positioned between the bearing surfaces. The bearing surfaces, the selector and the at least one motion transfer device define at least two roller bearing passages. At least one roller bearing is positioned in each passage. The roller bearings can be shifted between a tightening condition in which the roller bearings lock the bearing members together for tightening rotation of the carrier and a loosening condition in which the roller bearings lock the bearing members together for loosening rotation of the carrier. Opposite rotation of the carrier with respect to the tightening and the loosening rotation, respectively, unlocks the roller bearings to permit freewheeling of the carrier during the opposite rotation. The selector and the at least one motion transfer device are configured so that the selector is operable to shift the roller bearings between the tightening and loosening conditions, via the at least one motion transfer device. A biasing mechanism is operatively arranged with respect to the roller bearings so that the roller bearings are unlocked against a bias of the biasing mechanism during the opposite rotation and are driven back into one of the tightening and loosening conditions upon ceasing of the opposite rotation.

A roller clutch includes an outer race, an inner race, a first engagement member situated between the outer race and the inner race, a second engagement member situated between the outer race and the inner race, and an electromagnetic mover to be energized or de-energized. The first engagement member is configured to engage the outer race and the inner race to transmit torque between the outer race and the inner race in response to the electromagnetic mover being energized and the inner race applying negative torque to the second engagement member while the outer race applies positive torque to the second engagement member. The second engagement member is configured to engage the outer race and the inner race to transmit torque between the outer race and the inner race in response to the inner race applying positive torque to the second engagement member while the outer race applies negative torque to the second engagement member.

An aircraft landing gear including a wheel rotatable about an axle, a motor, and a bi-directional overrunning clutch, such as a roller or sprag clutch, operable to either connect the wheel with the motor or disconnect the wheel from the motor. The bi-directional clutch includes a ring-shaped overrunning track connected to the wheel by a plurality of drive keys, a ring-shaped drive track connected to the motor and concentrically aligned with the overrunning track, and a plurality of movable elements, each separately and individually movable, retained between the overrunning track and the drive track.

A drive arrangement for a drive train of a vehicle is provided. The drive arrangement includes an outer hub, an inner hub and rolling elements. The outer hub includes a fixed section and a movable section which can be reversibly connected to one another. In the disconnected state, the movable section is freely rotatable about a longitudinal axis of the outer hub. The rolling elements are displaceable in a longitudinal direction of the outer hub between the fixed section and the movable section.

A first interrupting mechanism (210) comprises a roller (281) disposed between a first driven gear (184) and a second shaft (182) and an operating rod (241) that operates the roller (281) between an engagement state in which the first driven gear (184) and the second shaft (182) can be rotated integrally with each other and a non-engagement state in which the first driven gear (184) and the second shaft (182) can be rotated relative to each other. The operating rod (241) can operate the roller (281) via a retainer (282) and abuts against the inner end of a pin (283).

A rotation transmission device includes an electromagnetic clutch including an armature, a rotor having an outer tubular portion and an inner tubular portion, and an electromagnet. A bearing support tube is provided at the outer end surface of a core supporting an electromagnetic coil of the electromagnet. A bearing is mounted in the bearing support tube so as to be axially fixed in position and not to be pulled out of the bearing support tube. The small-diameter tubular portion is provided at the end of the inner tubular portion of the rotor, and press-fitted in the bearing such that the rotor and the electromagnet form a unit.

An aircraft landing gear including a wheel rotatable about an axle, a motor, and a bi-directional overrunning clutch, such as a roller or sprag clutch, operable to either connect the wheel with the motor or disconnect the wheel from the motor. The bi-directional clutch includes a ring-shaped overrunning track connected to the wheel, a ring-shaped drive track connected to the motor and concentrically aligned with the overrunning track, and a plurality of movable elements retained between the overrunning track and the drive track. The movable elements are movable between; a driven configuration in which they prevent relative rotation between the drive track and the overrunning track to thereby permit the wheel to be driven by the motor; and an overrunning configuration in which they permit relative rotation between the drive track and the overrunning track to thereby disconnect the wheel from the motor.