| 摘要 |
<P>PROBLEM TO BE SOLVED: To form a projection part having strength and regulating displacement in the axial direction of middle rings on both side surfaces of a synchronization hub. Ž<P>SOLUTION: A double cone type synchromesh device has the synchronization hub 2, inner rings 5 and 6, outer rings 7 and 8 and the middle rings 9 and 10 having a cone surface on the inner-outer peripheries. The synchronization hub 2 is formed of sintered metal, and a plurality of projection parts 2d and 2e for axially and positionally regulating a small diameter side end surface of the middle rings 9 and 10, are formed on both obverse-reverse side surfaces of this synchronization hub. The obverse-reverse projection parts are formed in a position of making a phase different on the inverse side in the peripheral direction with a key groove 2c in-between. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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