| 摘要 |
In a claw coupling with a synchronization locking device for gear changing, a synchronization component (1) and a gearwheel (2) rotating at different speeds are locked together and synchronized by means of an annular sleeve (3) sliding in an axial direction. Internal teeth (31) on the sliding sleeve (3) mesh with corresponding outer teeth (11, 12) in the synchronization component (1) and gearwheel (2). Locking and/or pressure bolts (4) located between the synchronization component (1) and the sliding sleeve (3) engage in the non-coupled state with a recess (32) on the inner surface of the sliding sleeve (3) and have pressure surfaces (41) which co-operate with pressure surfaces (51) on a synchronization ring (5, 6) fitted between the synchronization body (1) and the gearwheel (2). At least two synchronization rings (5, 50; 6, 60) are connected together by entrainment devices (52, 520; 62, 620) and are in a drive relationship with the synchronization body (1) in both circumferential directions, with a peripheral clearance. Friction surfaces (24) associated with the gearwheel (2) form, with friction surfaces (53, 63) of the synchronization rings, several friction-type couplings. When no synchronization is present the axial movement of the sliding sleeve (3) is locked by arresting surfaces (37, 66). A coupling component (7) is fitted with a lateral clearance in a recess (12) in the synchronization component (1) and is connected to at least two synchronization rings (5, 50; 6, 60) connected together. As a result of the coupling of the two superimposed synchronization rings (5, 50) the frictional movement of the lower synchronization ring (50, 60) helps increase the locking moment, so that the tips of the locking teeth can be made narrower and unlocking is facilitated. |
