| 摘要 |
<p>PURPOSE:To enhance a pressing force by arranging a plurality of assist levers having large rigidity in a disc form between a piston and a pressure, retaining the levers with a presser plate, making the outer peripheral side thereof come in contact with a clutch drum and boosting pressure working on the pressure plate via the piston using the peripheral side as a supporting point. CONSTITUTION:A plurality of assist levers 44a having high rigidity are arranged in a disc form between a hydraulic piston 42 and a pressure plate 45 and retained with a presser plate 44b, thereby forming an assist member 44. The inner peripheral end part of the assist member 44 is made in contact with the piston 42 via a support ring 49a and the outer peripheral end part is clamped with a support ring 49b and a snap ring 49c. A projection is formed on the pressure plate 45 and comes in contact with the intermediate part of an assist lever when the piston 42 operates. During the operation, the assist member 44 is turned with the outer peripheral end thereof as a supporting point and due to the principle of lever operation, the pressing force of the piston 42 on the projection as a point of application is boosted and a hydraulic clutch 40 can be made compact without increasing hydraulic pressure.</p> |
