To provide a cam clutch easily switchable from a torque transmitting state to a freewheeling state even during torque transmission between race members. The cam clutch includes a plurality of cams set between a first race member and a second race member. The first race member and second race member are spaced away in the axial direction along the rotation axis of the first race member. The plurality of cams are disposed between the first race member and the second race member in the axial direction, and the first race member and the second race member are configured to be able to move relatively closer to and away from each other in the axial direction.

A locking clutch having an inner race that is rotatable with respect to an outer race. One of the races is cylindrically shaped and rotates adjacent to a race having valleys. Each valley is connected to an inclined surface. Rollers are located adjacent to the valleys. A cage having fingers may be restrained with respect to the valleys to set the starting position of the rollers. The cage may be selectively restrained to determine the direction in which the rollers are wedged to determine a direction that drives the rollers into contact with both races to lock the races with respect to each other. Rotation of the inner race with respect to the outer race in a direction opposite direction is a free rotating direction. The locking clutch is designed to simultaneously engage all of its rollers to evenly distribute the forces amongst them.

A spring component for a ratcheting mechanism, such as a ratchet wrench. The spring component is shaped to be retained in a recess without any special machining. For example, the spring component can be retained at three abutment points. A leaf of the spring component can abut a pawl, and a base portion opposite the leaf can abut the drive gear. Support arms can abut the sidewall of the recess to retain the spring component within the recess without the need for special machining or tooling.

In a drive unit attached to a vehicle-body frame of an electric-motor-assisted bicycle including a one-way clutch including an outer member, an inner member, a plurality of clutch lugs, a plurality of springs, and a plurality of pins. Clutch teeth are located on one of an inner peripheral portion of the outer member and an outer peripheral portion of the inner member. The clutch lugs and the springs are located on the other of the inner peripheral portion and the outer peripheral portion. A number of the clutch lugs is an even number not smaller than four. A number of the clutch teeth is an even number that is not a multiple of the number of the clutch lugs. A number of the springs is half the number of clutch lugs. Each spring exerts a biasing force on two of the clutch lugs that are circumferentially adjacent. Each pin is in contact with one of the springs.

The invention discloses a lower pair arc stop-block overrunning clutch comprising an outer rotating element, an inner rotating element, a friction block assembly, a wedge assembly, a first propeller assembly, a first elastic element and a synchronized push-block assembly, wherein a plurality of friction blocks of the friction block assembly are connected end to end and arranged between a first rotating ring and a second rotating ring; an drive element drives the first propeller assembly to press the synchronized push-block assembly to achieve synchronization of the friction block assembly; the first propeller assembly strikes the friction block assembly and is relatively stationary to push the friction block assembly for generating reverse rotation relative to a driven element; the wedge assembly is wedged to generate a radial pressure on the friction block assembly so that the friction block assembly can achieve lower pair arc stop, thereby achieving the transfer of torque.

To provide a cam clutch including an outer ring, an inner ring provided inside of the outer ring, a plurality of cams inserted between the outer ring and the inner ring, and an annular spring. A line connecting a first abutment portion between the outer ring and each of the cams and a second abutment portion between the inner ring and the cam and a line passing the second abutment portion form an angle in a state with the cams engaging with the outer ring and the inner ring. Rotation of the outer ring and the inner ring is enabled in the respective one directions while rotation thereof is restricted in the respective other directions. A groove is formed on an inner periphery of the outer ring or an outer periphery of the inner ring.

A one-way clutch 1 includes: an inner race 3; an outer race 5; a plurality of cams 7 interposed between an inner race outer peripheral surface 11 and an outer race inner peripheral surface 13 and serving to transfer a torque to between the inner race 3 and the outer race 5; a retaining mechanism retaining the plurality of cams 7; and a spring member 15 biasing the plurality of cams 7 to torque non-transfer positions, and the retaining mechanism includes a first retainer 9 fixed to the outer race 5 and having a cylindrical retaining portion 21 retaining the plurality of cams 7 at a predetermined interval in a circumferential direction, and a second retainer 29 disposed on an inner diametrical side of the cylindrical retaining portion 21, retaining the plurality of cams 7 in a swingable manner, and elastically deformable corresponding to the swings of the plurality of cams 7 when swinging in a torque transferring direction upon engagements of the plurality of cams 7 with the inner race outer peripheral surface 11 and the outer race inner peripheral surface 13.

The present invention relates to a freewheel (4) having an inner ring (38), an outer ring (40) and at least one wedging element (48) between the inner ring (38) and the outer ring (40), which can be moved from a wedging position, in which the wedging element (48) prevents rotation of the outer ring (40) relative to the inner ring (38) in a first circumferential direction (24), into a release position, in which the outer ring (40) can be rotated in an opposite, second circumferential direction (26) relative to the inner ring (38), wherein the wedging element (48) is preloaded into the wedging position by means of a spring element (64). The spring element (64) has an elongate spring body (66), which extends in a radial plane and has a corrugated profile in the radial direction (20, 22). The present invention furthermore relates to a freewheel arrangement (2) having a freewheel (4) of this kind.

A bi-directional overrunning clutch for transmitting torque to drive axle halves includes a clutch housing that attaches to an input gear, and hubs that attach to the axle halves. A pair of roll cages located within the housing adjacent to the hubs have rollers. The rollers wedge between the hubs and first tapered portions on the clutch housing when the roll cage is rotated forward relative to the housing, and between the hubs and second tapered portions on the clutch housing when the roll cage is rotated in the opposite direction. Springs hold the rollers engaged with recesses in the hubs, but let the rollers lift to permit relative rotation of the hubs and roll cages. Relative rotation between the roll cages is limited: when one roll cage is wedged, the other can move only as far as a free position midway between the first and second tapered portions.

A ribbon spring of a sprag type one-way clutch is an elongated strip of sheet metal, and includes a plurality of pockets formed by punching so as to be spaced apart from each other in the longitudinal direction of the strip, to define bridges between respective adjacent pairs of the pockets. A tongue protrudes from one circumferential side of each bridge. The strip is mounted between an outer ring and an inner ring, while being bent in a circular shape such that sprags inserted in the respective pockets are biased by the respective tongues in the direction in which the sprags engage. Each tongue has a cut surface formed by shearing at its distal end, and including a droop. The strip is bent in the circular shape such that each droop is located on the radially outer side of the cut surface, and in contact with the sprag.