| 摘要 |
A multiplate friction clutch can transmit power by pressing a stack of friction plates, which comprises plural separator plates and plural friction plates arranged alternately side by side, with a piston movable within a clutch casing. The multiplate friction clutch includes an annular holding groove formed in a pressing wall of the piston, a cushioning wave spring received in the holding groove, and an annular protuberance formed on an outer circumferential edge of an opening of the holding groove. The cushioning wave spring can be brought into resilient contact with one of the friction plates, which one friction plate is located adjacent to the piston. The annular protuberance prevents the wave spring from falling off the holding groove.
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