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 rotation transmission device includes torque cams provided between opposed surfaces of a flange of a control retainer and a flange of a rotary retainer and configured to convert an axial movement of the control retainer to relative rotational motion between the two retainers. All of the torque cams are circumferentially offset from all of the pillars of the control retainer and all of the pillars of the rotary retainer, and a pair of cam grooves forming each torque cam are heat-treated only at their areas that are brought into contact with a ball of the torque cam, to increase the hardness of these areas, thus improving the durability of the retainers.

A variable valve timing device applied to an engine system may include a rotor supplied with oil and rotated in clockwise and counterclockwise directions, one-way clutches coupled to the rotor to limit an amount of rotation of the rotor, a sprocket having a rotor hole surrounding an external diameter portion of the rotor, a rotation shaft fitted into a shaft hole of the rotor for the supply of oil to oil grooves, and a shaft fixing member coupled to the rotation shaft to fix the rotor and the rotation shaft, wherein the one-way clutches restrict clockwise/counterclockwise rotation of the rotor by torque of a camshaft, achieving an improvement in fuel efficiency/emission material (EM) of an engine.

A one-way clutch is configured to allow rotation in one direction with respect to a shaft and regulate rotation in the other direction, and includes a housing, a plurality of needles, a plurality of magnets, a plurality of first accommodating portions, and a plurality of second accommodating portions. The housing includes a fitting hole into which the shaft is fit. The plurality of magnets are respectively arranged adjacent to the plurality of needles. Each magnet has an S pole and an N pole corresponding to a first end side and a second end side of one of the needles, and attracts one of the needles by magnetic force to a first circumferential direction of the shaft. The plurality of first accommodating portions accommodate the plurality of needles, respectively. The plurality of second accommodating portions are respectively arranged adjacent to the first accommodating portions, and respectively accommodate the plurality of magnets.

A transmission mechanism includes first and second transmission, first and second shafts, a clutch, and a one-way bearing. In the first gear, power is output through the first driving transmission and the one-way bearing; and in the second gear, the power is output through the clutch, the second driving transmission and the one-way bearing.

A roller type one-way clutch includes an outer race in which at least one pocket having a cam surface on an inner periphery thereof is formed, an inner race which is spaced away from the outer race on an inside diameter side in a radial direction and which is relatively rotatably disposed concentrically with respect to the outer race, a roller which is disposed in the pocket and which engages with the cam surface to transmit a torque between the outer race and the inner race, a spring which is disposed between the outer race and the roller in the pocket and which urges the roller in a direction in which the roller engages with the cam surface, and a side plate secured to be in contact with one end surface in an axial direction of the outer race. The side plate has a non-circular shape, the one end surface in the axial direction is annular, and at least a portion of the one end surface in the axial direction of the outer race is exposed in a state in which the side plate is secured.

A race for a mechanical clutch assembly may be formed from multiple race layers that assembled from pluralities of stamped arcuate segments. First and second race layers may have the same shape when their arcuate segments are assembled are assembled. The arcuate segments of the first race layer may be identical to each other, and the arcuate segments of the second race layer may be identical to each other, but the first layer arcuate segments are not identical to the second layer arcuate segments. Interlocking joints between the first layer arcuate segments are not aligned with interlocking joints between the second layer arcuate segments when the race layers are joined together and aligned for use in the mechanical clutch assembly.

A clutch assembly includes a drive shaft extending along an axial direction, and an output component, the output component defining a central opening in which the drive shaft is inserted. The clutch assembly further includes a clutch selectively coupling the output component to the drive shaft. The clutch includes a cavity defined in the output component and in communication with the central opening. The clutch further includes a bearing disposed within the cavity, the bearing movable within the cavity between a first position and a second position. The bearing is spaced from the drive shaft in the first position. The bearing contacts an inner surface of the output component defining the cavity and contacts the drive shaft to transfer rotational motion from the drive shaft to the output component in the second position.

An electro-mechanical braking apparatus includes a braking motor and a lock apparatus. One end of a motor shaft of the braking motor is configured to drive a brake, and the lock apparatus is configured to lock the braking motor through the other end of the motor shaft of the braking motor. The lock apparatus includes a clutch, an axial moving member, and a driving motor. The clutch is sleeved on the other end of the motor shaft of the braking motor. The driving motor is configured to drive the axial moving member to move away from or toward the clutch.

An object of the invention is to provide a positive clutch that has a high rigidity and simple structure, and offers potential to allow easy adjustment of torque limit load, suppress friction loss and noise generation, realize a size reduction, and extend the service life. This positive clutch is configured to prohibit relative rotation of an outer and inner races by circumferentially holding each of a plurality of rollers between an outer race slope portion and an inner race slope portion. The clutch includes a torque limiter mechanism, which includes a piston member having a flat portion that forms the outer or inner race slope portion, and a resilient member that applies a constant load on the piston member. The piston member is slidably accommodated in a piston member accommodating hole formed in the outer race or the inner race.