| 摘要 |
A synchronizer (22) (e.g. pin-type, double acting) with friction clutches (26,50 and 28,52), jaw clutches (30,34 and 32,36), a shift flange (42), self-energizing ramps (13b,13c,13d,13e) affixed to a shaft (12), a spring (58) loaded pre-energizer assembly (56), and self-energizing ramps (45a,45b,45c,45d) affixed to a self-energizer member (44). Engagement of the ramps in response to an operator shift (Fo) applied to the shift flange provides an additive axial force (Fa) for increasing the engagement force of the friction clutches. The member (44) is secured for rotation with and sliding movement relative to the flange (42). Spring washers (46,48) react in opposite directions between member (44) and the jaw members (34,36) for limiting the amount of additive axial force (Fa). Blocker shoulders (42d,54c and 42e,54d) prevent asynchronous engagement of the jaw clutches. Spring washers (68,70) are interposed between the friction clutches and the blocker shoulders for returning the shift flange to a neutral position and disengage the self-energizing ramps in response the removal of the shift force (Fo) prior to completion of the a shift. <IMAGE> |
