Patent ID: 7370743
Filing Date: 2008-05-13
Classification: F16D

Abstract:
1. A power transmitting apparatus comprising: a clutch housing rotatable together with an input member having a plurality of driving clutch plates; a clutch member connected to an output member having a plurality of driven clutch plates alternately arranged between the driving clutch plates of the clutch housing; a rotational force inputted to the input member can be transmitted to or cut-off from the output member via pressure-contact or release between the driving clutch plates and driven clutch plates; said clutch member includes pressure-contact assisting cams, when a transmission condition of rotational force inputted to the input member to the output member is achieved, said assisting cams increasing the pressure-contacting force between the driving clutch plates and driven clutch plates, said clutch member also including back-torque limiting cams, when the rotational speed of the output member exceeded that of the input member, said torque limiting cams releasing the connection between the driving clutch plates and the driven clutch plates, and a gradient angle of the back-torque limiting cams is formed larger than a gradient angle (α