| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce size by constituting a return spring of a piston and a spring for cushioning out of a single spring. SOLUTION: A piston 18 brings first/second clutch plates 20, 21 of the clutch part 17 into pressure contact with each other, so that motive power inputted to a clutch case 15 is outputted to an output member 16 through this clutch part 17. A function of a return spring and a function of a cushioning spring are realized by a single return spring 40. The return spring part presses the clutch plates 20, 21 by the pressing part of the piston 18 at cushioning action time. Therefore, since there is no need to thicken a thickness of the first clutch plate 20 to which the return spring 40 abuts, shortening can be realized in the axial direction.</p> |
