| 摘要 |
The synchronizer for pinion (16A,16b) is mounted free to rotate on a shaft (12). It consists of a hub (14) carried on a shaft and joined to it in rotation. A control sleeve (18) is mounted to slid axially on the hub (14) which has internal coupling teeth (28) joining it in rotation with the hub (14). When at either of its extreme positions, it engages with the complementary teeth (30A,30B,32A,32B) provided on the two toothed gears (34A,36A,34B,36B). The first of the teeth is carried by the hub (14) and the second is joined in rotation to the pinion (16A,16B) in a way to join in rotation the hub and the two coupling pieces. This is done by friction pieces (42A,42B,44A,44B) of which the first is joined to the hub, when the control sleeve (18) is operated, and the second is joined to the pinion (16A,16B).
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