| 摘要 |
PURPOSE:To enable to achieve simultaneously the cooling of a friction plate and the reducing of a dragging torque by a method wherein an oil exhaust hole from a escape hole is located at the outer position from a web part of a clutch center, and a communicating hole is provided between the outside and the inside of the web part. CONSTITUTION:An escape hole 27e communicating a hydraulic chamber 31 with a hollow part 27d is opened on a pressure receiving surface part 27a of a pressure plate 27. A lead valve 38 blocking the escape hole 27e is mounted on a pressure receiving surface part 27a, an exhaust hole 27a is opened on the top of a protruded part 27c. A communicating hole 24d is opened on a web part 24b of a clutch center 24. Thereby, a part of an oil exhausted from the hydraulic chamber 31 to the outside of the web part 24b of the clutch center 24 is flowed into the inside of the web part 24b of the clutch center 24 through the communicating hole 24d, accordingly, friction plates 25, 26 are cooled and the friction coefficient is stabilized. |
