| 摘要 |
A power transmitting apparatus has a clutch housing ( 2 ). A clutch member ( 4 ), connected to an output member ( 3 ), has a plurality of driven clutch plates ( 7 ) alternately arranged between driving clutch plates ( 6 ) of the clutch housing ( 2 ). A rotational force, inputted to the input member ( 1 ), can be transmitted to or cut-off from the output member ( 3 ) via pressure-contact or release between the driving clutch plates ( 6 ) and driven clutch plates ( 7 ). Pressure-contact assist cams and back-torque limiting cams are formed on a pressure plate 5 and the clutch member 4 . The gradient angle (alpha 2 ) of the back-torque limiting cams is formed larger than the gradient angle (alpha 1 ) of the pressure-contact assisting cams.
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