The rotation transmission state switching device comprises a clutch device comprising a first rotating member having a first-rotating-member-side engaging portion, a second rotating member having a second-rotating-member-side engaging portion, a third rotating member having a third-rotating-member-side engaging portion; and an engaging element having an engaging-element-side first engaging portion engaging with the first-rotating-member-side engaging portion, an engaging-element-side second engaging portion engaging with the second-rotating-member-side engaging portion, and an engaging-element-side third engaging portion engaging with the third-rotating-member-side engaging portion; and a restriction device configured to switch between allowing and restricting rotation of the first rotating member, allowing or preventing torque transmission between the second rotating member and the third rotating member.

The rotation transmission state switching device comprises a clutch device comprising a first rotating member having a first-rotating-member-side engaging portion, a second rotating member having a second-rotating-member-side engaging portion, a third rotating member having a third-rotating-member-side engaging portion; and an engaging element having an engaging-element-side first engaging portion engaging with the first-rotating-member-side engaging portion, an engaging-element-side second engaging portion engaging with the second-rotating-member-side engaging portion, and an engaging-element-side third engaging portion engaging with the third-rotating-member-side engaging portion; and a restriction device configured to switch between allowing and restricting rotation of the first rotating member, allowing or preventing torque transmission between the second rotating member and the third rotating member.

A hydraulic transformer clutch employs radial hydraulic piston assemblies with integrated electrohydraulic actuation. The hydraulic transformer clutch includes: an output shaft, an output disc affixed to the output shaft for rotation therewith, an input shaft, a rotatable housing affixed to one of the input shaft or the output shaft for rotation therewith, a plurality of hydraulic cylinders, and a plurality of working pistons. The hydraulic cylinders are operatively connected to the rotatable housing, and are spaced about the rotatable housing. Each working piston is slidably mounted within a corresponding hydraulic cylinder of the plurality of hydraulic cylinders, and is positioned to be selectively pushed, when actuated, to create a rigid connection between the input shaft and the output shaft. One or more actuator pistons are pushed by an electromagnet and create pressure that is distributed on working piston surfaces and generates active torque.

A hydraulic transformer clutch employs radial hydraulic piston assemblies with integrated electrohydraulic actuation. The hydraulic transformer clutch includes: an output shaft, an output disc affixed to the output shaft for rotation therewith, an input shaft, a rotatable housing affixed to one of the input shaft or the output shaft for rotation therewith, a plurality of hydraulic cylinders, and a plurality of working pistons. The hydraulic cylinders are operatively connected to the rotatable housing, and are spaced about the rotatable housing. Each working piston is slidably mounted within a corresponding hydraulic cylinder of the plurality of hydraulic cylinders, and is positioned to be selectively pushed, when actuated, to create a rigid connection between the input shaft and the output shaft. One or more actuator pistons are pushed by an electromagnet and create pressure that is distributed on working piston surfaces and generates active torque.

A rotation moment transmission device (1) for a driving device of a furniture comprises a housing (2) comprising a first friction surface (3) having a circular cross-section, a rotation moment transmission member (4) having a rotation axis (DA) and a second friction surface (5), wherein the second friction surface (5) is movable radially with respect to the rotation axis (DA) and the first friction surface (3) and the second friction surface (5) are configured to collaborate for a rotation moment transmission, and a rotation moment introduction member (6) which is rotatable about the rotation axis (DA). One of the rotation moment transmission member (4) and the rotation moment introduction member (6) comprises an engagement member, the other one thereof comprises a contact surface (8, 8′, 8″, 8‴, 8⁗) and the engagement member (7) is configured to the contact the contact surface (8, 8′, 8″, 8‴, 8‴′) such that a twisting of the rotation moment introduction member (6) relatively to the rotation moment transmission element (4) moves the second friction surface (5) with respect to the rotation axis (DA) radially towards the first friction surface (3) or away therefrom.

A rotation moment transmission device (1) for a driving device of a furniture comprises a housing (2) comprising a first friction surface (3) having a circular cross-section, a rotation moment transmission member (4) having a rotation axis (DA) and a second friction surface (5), wherein the second friction surface (5) is movable radially with respect to the rotation axis (DA) and the first friction surface (3) and the second friction surface (5) are configured to collaborate for a rotation moment transmission, and a rotation moment introduction member (6) which is rotatable about the rotation axis (DA). One of the rotation moment transmission member (4) and the rotation moment introduction member (6) comprises an engagement member, the other one thereof comprises a contact surface (8, 8′, 8″, 8‴, 8⁗) and the engagement member (7) is configured to the contact the contact surface (8, 8′, 8″, 8‴, 8‴′) such that a twisting of the rotation moment introduction member (6) relatively to the rotation moment transmission element (4) moves the second friction surface (5) with respect to the rotation axis (DA) radially towards the first friction surface (3) or away therefrom.

The invention relates to a coupling device for a drive train of a motorcycle or other motor vehicle, in particular for suppressing a so-called hopping. According to the invention, the coupling device has an output rotation part, a switchable friction coupling, which has an energy storage device for closing thereof and which is closed in an unactuated state, and at least one freewheel coupling for forming a torque transmission path for torque transmission from the input rotating part to the output rotating part, wherein the freewheel coupling includes the following components: an inner rotating element, the outer circumference of which forms a sawtooth-shaped circumferential structure having a plurality of circumferentially extending ramps; a substantially annular plate structure having an individual plate element or a stack of a plurality of plate elements, the inner circumference of which forms a sawtooth-shaped circumferential structure having a plurality of circumferentially extending counter-ramps to form an interlock and/or a friction lock together with the ramps of the inner rotating element in a rotation direction; and an outer rotating element surrounding the plate structure. The invention further relates to a corresponding drive train having such a coupling device.

The invention relates to a coupling device for a drive train of a motorcycle or other motor vehicle, in particular for suppressing a so-called hopping. According to the invention, the coupling device has an output rotation part, a switchable friction coupling, which has an energy storage device for closing thereof and which is closed in an unactuated state, and at least one freewheel coupling for forming a torque transmission path for torque transmission from the input rotating part to the output rotating part, wherein the freewheel coupling includes the following components: an inner rotating element, the outer circumference of which forms a sawtooth-shaped circumferential structure having a plurality of circumferentially extending ramps; a substantially annular plate structure having an individual plate element or a stack of a plurality of plate elements, the inner circumference of which forms a sawtooth-shaped circumferential structure having a plurality of circumferentially extending counter-ramps to form an interlock and/or a friction lock together with the ramps of the inner rotating element in a rotation direction; and an outer rotating element surrounding the plate structure. The invention further relates to a corresponding drive train having such a coupling device.

A wedge plate for a wedge clutch assembly for selectively engaging or disengaging an inner hub and an outer ring including first wedge plate segments arranged radially between the inner hub and outer ring, each of the first wedge plate segments including a first circumferentially extending groove and a first retaining element disposed in the first circumferentially extending groove and urging the first wedge plate segments radially inward to contact the inner hub.

A wedge clutch, including: a hub; a ring located radially outward of the hub; a wedge plate radially between the hub and the ring; and a displacement assembly including an element and an engagement arm. To transition from a disconnect mode for the wedge clutch, in which the hub and the ring are relatively rotatable, to a connect mode for the wedge clutch, the engagement arm is arranged to pivot in a first rotational direction to displace the hub in a first axial direction. To transition from the connect mode to the disconnect mode, the engagement arm is arranged to pivot in a second rotational direction, opposite the first rotational direction and the element is arranged to displace the hub in a second axial direction, opposite the first axial direction.