| 摘要 |
<p>PROBLEM TO BE SOLVED: To securely prevent circumferential collapse and displacement of a return coil spring urging a piston without increasing number of parts and increase of manufacturing cost. SOLUTION: The clutch is provided with a clutch drum 71 rotatably supported in a transmission case 180, a clutch hub 72, a frictional connection member 75 arranged at the opposed face of the clutch drum and clutch hub, a cylinder 131 formed in the clutch drum, a piston 132 arranged slidably on the cylinder to push the frictional connection member, a centrifugal cancel piston 134 forming a centrifugal cancel oil chamber between the piston and the cancel piston, and a plurality of return coil springs 15 inserted in between the piston 132 and the centrifugal cancel piston 134. A guide groove 132h is provided for preventing the circumferential collapse of the return coil spring in the unsliding cylinder 132c which does not slide with the clutch drum of the piston 132.</p> |
