| 摘要 |
A synchronizer for transmissions, wherein the surfaces of the recesses, in which the locking claws of an outside ring are fitted, that are formed in a synchromesh cone so as to extend in the circumferential direction thereof are tapered, whereby thrust toward a clutch hub is generated in the outside ring during a synchronizing operation. The outside ring lightly contacts a block ring before a shifting operation is started. One side surface of the outside ring can be brought into close contact with a side surface of the clutch hub by a thrusting action of the outside ring.
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