A friction clutch for a motor vehicle includes an adjustment mechanism compensating for wear of a friction disk. The adjustment mechanism (40) includes a first cam ring (52) rotatably fixed and a second cam ring (54) rotatable relative to the first cam ring (52). Both cam rings (52,54) have a plurality of cam surfaces configured such that rotation of the second cam ring (54) relative to the first cam ring (52) varies a height of the adjustment mechanism (40). A torsion spring (60) applies a biasing force to the second cam ring (54). A back drive prevention assembly (70) includes a back drive spring (80) attached to the pressure plate and first cam ring (52) to prevent back drive of the second cam ring (54) through a baffle (62) including a plurality of cam teeth (72) formed on a bottom surface of the baffle (62). The cam teeth (72) are formed at an angle A relative to a bottom surface of the baffle (62) decreasing displacement and loads of the back drive spring (80).

A print bar for inkjet printing includes print heads disposed in a row, adjustment devices for adjusting the print heads relative to one another in which each of the adjustment devices includes at least one screw and at least one shaft for rotating the at least one screw, and a compensation coupling interconnecting the screw and the shaft. The compensation coupling includes a first coupling half and a second coupling half configured to fit together under elastic deformation. The first coupling half includes spring claws having a first pitch and the first coupling half is disposed on the shaft. The second coupling half including a toothing having a second pitch and the second coupling half is disposed on the screw. The first and second pitches differ from one another.

A fast release mechanism for a twin plate friction clutch including a biasing member positioned between the intermediate plate and the flywheel surface, and a retaining member for retaining the biasing member in place relative to the intermediate plate or flywheel surface during installation. In one embodiment, the fast release mechanism comprises a spring and a clip that retains the spring in place relative to the intermediate plate. When used with positioner pins extending through the intermediate plate, each clip may be U-shaped and includes a hole on its upper wall and a slot on its lower wall sized to receive the pin. The arms defining the slot extend partly over the end of the springs to keep the spring in place.

A friction clutch includes a housing, an axially displaceable pressure plate, a lever system for displacing the pressure plate, a ramp system arranged between the pressure plate and the lever system, a torsion device for rotating the ramp system, and a control device. The torsion device has a spindle to drive the ramp system and a drive gear with an external profile. The control device has a fastening portion fixed to the housing and a pawl with a plurality of tongues to forming a positive interlock. At least one tongue is arranged to engage the external profile. Each tongue is separated from another tongue by a gap extending in the axial direction. At least one gap, starting from a tip of the tongue, extends in the axial direction 30% or less of a minimum distance between the tip and the fastening portion.

A method of clutch wear notification comprises detecting engaged clutch positions at a first interval and storing the values of the engaged clutch positions. The stored values of the engaged clutch positions can be averaged at a second interval to create running averages, and the running averages can be stored. The running averages are compared at a third interval to determine a rate of change in the clutch positions. A clutch wear-out is signaled when comparing the running averages indicates that the rate of change in the clutch positions deviates from a normal rate of change. The clutch position during an engaged condition can deviate from the normal rate of change when the axial position of the release bearing begins to increase due to an adjustment mechanism ceasing to adjust.

A lockup clutch for a torque converter is provided. The lockup clutch includes a piston including a first wedge surface and a support supporting the piston. The piston is axially slidable along the support in a first axial direction to cause engagement of the lockup clutch. The lockup clutch also includes a wedge including a second wedge surface. The wedge is axially movable along the support. The first wedge surface is arranged and configured with respect to the second wedge surface such that contact between the first wedge surface and the second wedge surface limits axial movement of the piston in a second axial direction opposite the first axial direction. A torque converter and a method of forming a lockup clutch are also provided.

A rotation locking device includes a locking module and at least one engaging member. The at least one engaging member is rotatably coupled to the locking module. The locking module is configured to engaging and disengage the at least one engaging member, thereby refraining the at least one engaging member from rotating relative to the locking module.

The present invention relates to a clutch (100) comprising: a rotatable housing (101); a fixed hub (201) internal to the housing (101) and a movable hub (202) axially mounted onto the fixed hub (201); a plurality of discs (204) interposed between the fixed hub (201) and the movable hub (202). The fixed hub (201) and the movable hub (202) axially slide, getting farther or closer so as to transmit a variable axial load onto the discs (204), to selectively transmit a torque. The clutch (100) further comprises a pressure plate assembly (208) for controlling the variable axial load, including a centrifugal assembly (210) comprising: a rotatable mass holder (211) and a plurality of mass elements (212) radially disposed. Each mass element (212) comprises a pivot (301) and is configured for a displacement (1002) by pivoting under centrifugal effects. The mass elements (212) are thus configured for exerting an axial thrust within the pressure plate assembly (208), to bring the movable hub (202) closer to the fixed hub (201), so as to increase the variable axial load and allowing the clutch (100) (automatic) engagement. Each mass element (212) comprises a main body (302) and a column element (303) which connects the pivot (301) with the main body (302).

A wear compensation device of a clutch actuator may include a screw movable along a longitudinal direction of a pull-rod axially received in the screw, a screw guider holding the screw to allow movement in the longitudinal direction and having a connection pin connected to a link member, a compensation nut supported by the screw guider, engaged with the screw, and having catching teeth, a compensation ring externally coupled with the compensation nut, having a catching protrusion to be locked with the catching teeth in one direction thereof, and having a guide pin on an external circumference of the compensation ring, and a guide block fixed to a housing, having a guide groove to receive the guide pin, and guiding the guide pin to rotate the compensation ring when the pull-rod is operated to a wear compensation range.

An adjustment mechanism for a clutch is positioned between the diaphragm spring and the pressure plate, the adjustment mechanism including: a first cam ring rotatably fixed with respect to the pressure plate, a second cam ring rotatable relative to the first cam ring and both cam rings having a plurality of cam surfaces configured such that rotation of the second cam ring relative to the first cam ring varies a height of the adjustment mechanism, and a torsion spring including a longitudinal axis. The torsion spring is disposed in the annular groove. The torsion spring includes a helical round cylindrical body that extends to a first end connected to the first cam ring and the torsion spring has a second end connected to the pressure plate. The torsion spring applies a biasing force to the second cam ring promoting rotation of the second cam ring relative to the first cam ring. The pressure plate includes a locking slot formed therein partially through the pressure plate and through the opposing surface. The locking slot is formed at an angle relative to the opposing surface and the second end of the torsion spring includes a locking hook formed thereon. The locking hook extends perpendicular to the longitudinal axis of the torsion spring. The locking hook is disposed in the locking slot fixing the locking hook relative to the pressure plate.