Clutching device for idling pinion rotating on shaft comprises synchronization ring, interposed between hub and pinion, having three angularly distributed toothed sectors received in hub cavities extending hub flutings to drive ring

摘要

The clutching device (10) for an idling pinion (12) on a shaft comprises a truncated synchronization ring (28) interposed with axial play between a hub (16) and the idling pinion. The ring comprises three peripheral toothed sectors (34) distributed regularly and angularly which are received with play in corresponding hub cavities (36) which extend hub flutings (22) in order to drive the ring. An undulating washer (46) interposed between the ring and the idling pinion acts axially on and brakes the ring relative to the hub so that one of the lateral (48) and transverse (50) edges of the toothed sectors are plated laterally and axially without play against one of the lateral (38) and transverse (52) edges of the hub cavities.