A clutch includes a pair of concentric races rotatable about an axis and a disk radially disposed between the races. The disk has edges each engageable with one of the races and has opposing first and second opposing faces extending between the edges. An annular resilient member has a first segment adjacent to the first face and a second segment adjacent to the second face.

A clutch for selectively coupling first and second rotational members includes a hub rotatable about an axis and connectable to the first rotational member, and a carrier rotatable about the axis and connectable to the second rotational member. One of the hub and the carrier defines an annular groove and the other of the hub and the carrier defines a ramped surface. A wedge plate of the clutch has a first edge disposed on the ramped surface, a second edge disposed in the annular groove, and a face extending between the edges and defining an annular shoulder. An annular resilient member is seated against the shoulder.

A clutch structure of a transmission includes: a hub secured to a rotating shaft, a sleeve mounted on the hub so as to slide linearly, a clutch gear to rotate relative to the rotating shaft and integrally formed with a clutch cone, a first friction ring provided between the clutch gear and the hub to be pressed toward the clutch gear, a second friction ring having an inner surface to contact an outer surface of the clutch cone, and a middle cone having an inner surface to contact an outer surface of the second friction ring and an outer surface to contact an inner surface of the first friction ring. Each of the second friction ring and the middle cone is provided with a friction member on at least one of an inner diameter portion and an outer diameter portion each of the second friction ring and the middle cone.

A load connecting mechanism includes a mounting portion, a contact portion, and a force-exerting portion. The mounting portion is configured to mount the load connecting mechanism to a power source and a load, respectively. The contact portion is disposed on the mounting portion and includes two slidably coupled contact faces. The force-exerting portion is configured to provide a force to the contact faces in an axial direction of the power source to make the contact faces closely slidably couple to each other. Through the slidable coupling relationship between the contact faces, power of the power source is progressively transmitted to the load and finally drives the load to rotate in synchronization with the power source. The present invention further provides a motor driving assembly and a fan. The mechanism can satisfy the needs of bidirectional rotation of a load such as a fan and of large startup torque.

A load connecting mechanism includes a mounting portion, a contact portion, and a force-exerting portion. The mounting portion is configured to mount the load connecting mechanism to a power source and a load, respectively. The contact portion is disposed on the mounting portion and includes two slidably coupled contact faces. The force-exerting portion is configured to provide a force to the contact faces in an axial direction of the power source to make the contact faces closely slidably couple to each other. Through the slidable coupling relationship between the contact faces, power of the power source is progressively transmitted to the load and finally drives the load to rotate in synchronization with the power source. The present invention further provides a motor driving assembly and a fan. The mechanism can satisfy the needs of bidirectional rotation of a load such as a fan and of large startup torque.

A clutch plate assembly includes a central axis, a clutch plate with a first friction surface and a radially outer depressed portion, and a friction material ring. The friction material ring is bonded to the first friction surface and extends radially outside of the first friction surface such that an outer portion of the friction material ring is axially aligned with the clutch plate radially outer depressed portion. In an example embodiment, the first friction surface is disposed at an acute angle to a plane orthogonal to the central axis. In some example embodiments, the first friction surface is conical. In an example embodiment, the radially outer depressed portion is conical and axially offset from the first friction surface. In an example embodiment, the radially outer depressed portion is manufactured by machining, stamping, or coining.

A clutch plate assembly includes a central axis, a clutch plate with a first friction surface and a radially outer depressed portion, and a friction material ring. The friction material ring is bonded to the first friction surface and extends radially outside of the first friction surface such that an outer portion of the friction material ring is axially aligned with the clutch plate radially outer depressed portion. In an example embodiment, the first friction surface is disposed at an acute angle to a plane orthogonal to the central axis. In some example embodiments, the first friction surface is conical. In an example embodiment, the radially outer depressed portion is conical and axially offset from the first friction surface. In an example embodiment, the radially outer depressed portion is manufactured by machining, stamping, or coining.

A friction material for a motor vehicle drive train component is provided. The friction material includes an outer circumference, an inner circumference, an engagement surface configured for engaging with and disengaging from a mating component and a coined section extending between at least one of the outer circumference and the engagement surface and the inner circumference and the engagement surface. A method of forming a friction material for a motor vehicle drive train component is also provided. The method includes attaching a first axial surface of the friction material to a support and coining at least one of an inner circumference and an outer circumference at a second axial surface of a friction material to form a coined section. The second axial surface is on an opposite side as the first axial surface.

A friction material for a motor vehicle drive train component is provided. The friction material includes an outer circumference, an inner circumference, an engagement surface configured for engaging with and disengaging from a mating component and a coined section extending between at least one of the outer circumference and the engagement surface and the inner circumference and the engagement surface. A method of forming a friction material for a motor vehicle drive train component is also provided. The method includes attaching a first axial surface of the friction material to a support and coining at least one of an inner circumference and an outer circumference at a second axial surface of a friction material to form a coined section. The second axial surface is on an opposite side as the first axial surface.

The invention relates to a friction ring (1) for a synchronization unit of a gear changing transmission. The friction ring (1) comprises a conical friction ring body (4) having an inner friction surface (401) and an outer installation surface (402) which each bound the friction ring body (4) in a radial direction extending perpendicular to an axial friction ring axis (6). The friction ring body (4) is interrupted in a circumferential direction (U) extending around the friction ring axis (6) by a separation point (5) in such a way that a first separation surface (7) and a second separation surface (8) are formed at the separation point (5). In order to ensure that the friction ring (1) takes a controlled axial position relative to a synchronizer ring during the synchronization, the first separation surface (7) and the second separation surface (8) contact each other in a predefinable area in such a way that the friction ring body (4) is shaped in the form of a closed contour in the circumferential direction (U) with a smallest circumference (13).