KUPPLUNGSSYNCHRONISIEREINHEIT.

摘要

In an inertia lock- and key-type synchronizing clutch assembly, engagement between conical clutch surfaces (29,36) of a splined ring (28) and a synchronizer ring (35) is enhanced spontaneously under a servo action by a cam means (ramps 45,46 and ball 47) disposed between the synchronizer ring (35) and a hub member (31). Two problems rising from the servo action are solved by additional structures provided to a key member (39) and to the synchronizer ring. Thus, unintended spontaneous engagement of the clutch mechanism from a neutral condition thereof is prevented with certainty by cooperation between the key member and a pair of stopper projections (48,49) on the synchronizer ring. The key member includes at an inner surface thereof a recess (50) for permitting a rotational displacement of the synchronizer ring when a clutch-engaging operation is performed. Further, an end face of such recess includes a ramp surface (51; 51A,51B) which cooperates with one of the projections of the synchronizer ring so as to assure a clutch-disengaging operation even when a re-engagement of the clutch surfaces due to the servo action is caused in a clutch-disengaging process.