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).

A dual clutch having a flywheel comprising an inner conical surface and an outer conical surface, a first clutch comprising a first contact member that is axially movable along an axis relative to first and second transmission-side input shafts for engaging a first conical clutch disc connected to a first input shaft with the inner conical surface of the flywheel, a second clutch comprising a second contact member that is axially movable along the axis relative to the first and second transmission-side input shafts for engaging a second conical clutch disk connected to a second input shaft with the outer conical surface of the flywheel, a mounting means connected to a clutch housing of the dual clutch or to a transmission housing of a motor vehicle transmission, and, actuation means for moving the first clutch and/or the second clutch along the axis.

A dual clutch having a flywheel comprising an inner conical surface and an outer conical surface, a first clutch comprising a first contact member that is axially movable along an axis relative to first and second transmission-side input shafts for engaging a first conical clutch disc connected to a first input shaft with the inner conical surface of the flywheel, a second clutch comprising a second contact member that is axially movable along the axis relative to the first and second transmission-side input shafts for engaging a second conical clutch disk connected to a second input shaft with the outer conical surface of the flywheel, a mounting means connected to a clutch housing of the dual clutch or to a transmission housing of a motor vehicle transmission, and, actuation means for moving the first clutch and/or the second clutch along the axis.

Proposed is a complex clutch apparatus which includes a rotating block provided with a central shaft extending upward and an upward inclined protrusion part which surrounds a lower portion of the central shaft and is spaced apart by a predetermined distance from the central shaft, a C-shaped plate spring which surrounds an outer circumferential surface of the upward inclined protrusion part and is in elastically close contact with the outer side surface of the upward inclined protrusion part, a clutch gear provided with a downward inclined protrusion part press-fitted between the central shaft and the upward inclined protrusion part, and a holding protrusion inserted between opposite ends of the C-shaped plate spring in a longitudinal direction thereof; and an elastic body which is fixedly coupled to the central shaft and applies a downward elastic force to an upper surface of the clutch gear.

Proposed is a complex clutch apparatus which includes a rotating block provided with a central shaft extending upward and an upward inclined protrusion part which surrounds a lower portion of the central shaft and is spaced apart by a predetermined distance from the central shaft, a C-shaped plate spring which surrounds an outer circumferential surface of the upward inclined protrusion part and is in elastically close contact with the outer side surface of the upward inclined protrusion part, a clutch gear provided with a downward inclined protrusion part press-fitted between the central shaft and the upward inclined protrusion part, and a holding protrusion inserted between opposite ends of the C-shaped plate spring in a longitudinal direction thereof; and an elastic body which is fixedly coupled to the central shaft and applies a downward elastic force to an upper surface of the clutch gear.