Abstract: A synchronization unit for a positive dual clutch. The synchronization unit has a sleeve carrier that is axially and rotationally fixed to an output shaft and a shifting sleeve that is rotationally fixed and axially displaceable relative to the sleeve carrier. The synchronization rings of a synchronization clutch on the sleeve carrier side and the sleeve carrier comprise axially interlocked circumferential segments.

Abstract: A dual shift coupling including two operatively connected coupling units mounted on a shared, integrally formed inner body in a rotationally fixed and axially movable manner. Further, a multi-part pressure disk is arranged between the coupling units in an axially fixed manner and is supported by the inner body, and has two axially movable pressure pistons ventilated by respective pressure spring assemblies arranged in the inner body. A radial notch for accommodating the pressure disk is provided in the inner body, wherein the radial depth of the notch extends at least to radial inner wall segments of recesses for the pressure spring assemblies. Each pressure spring assembly has a plurality of pressure springs which rest on the inner side of the pressure disk relative to the axis.

Abstract: A synchronization unit for a positive dual clutch. The synchronization unit has a sleeve carrier that is axially and rotationally fixed to an output shaft and a shifting sleeve that is rotationally fixed and axially displaceable relative to the sleeve carrier. The synchronization rings of a synchronization clutch on the sleeve carrier side and the sleeve carrier comprise axially interlocked circumferential segments.

Abstract: A dual shift coupling including two operatively connected coupling units mounted on a shared, integrally formed inner body in a rotationally fixed and axially movable manner. Further, a multi-part pressure disk is arranged between the coupling units in an axially fixed manner and is supported by the inner body, and has two axially movable pressure pistons ventilated by respective pressure spring assemblies arranged in the inner body. A radial notch for accommodating the pressure disk is provided in the inner body, wherein the radial depth of the notch extends at least to radial inner wall segments of recesses for the pressure spring assemblies. Each pressure spring assembly has a plurality of pressure springs which rest on the inner side of the pressure disk relative to the axis.

Abstract: A frictional coupling, especially synchronization device of gear mechanisms, with at least two coupling bodies (1, 2) which come into frictional contact upon engagement of the coupling, wherein one coupling body consists of one ring-shaped base body (3) of metal with at least one flat, conical or cylindrical carrier surface, to which a frictional layer made of organic or inorganic frictional material (4) is attached, and at least one other coupling body of a counter body (8), preferably also made of metal, and has a counter surface which works together with the frictional layer, is further developed for closed systems such that clamping or damage to the edges can be avoided with continued unimpaired function and the usage in the new condition is facilitated.