Synchronization unit for switching gear wheel in transmission, has actuating element arranged relative to shaft in axially adjustable manner, and including actuating surface for clamping elements for radial stretching

摘要

The unit (1) has cover-shaped sections (7, 8) formed with a relative axial movement (a) for stretching in radial direction (r). A part of the cover-shaped sections is arranged in a front sided ring groove which is incorporated in loose wheels (2, 3) or a driving collar. The collar is rotatably connected with the loose wheel. An actuating element (10) is arranged relative to a shaft (4) in an axially adjustable manner, and includes an actuating surface (11) for clamping elements (5, 6) for radial stretching. A molybdenum or sulfur coating is provided on the clamping elements.