Patent ID: 7810236
Filing Date: 2010-10-12
Classification: F16D,Y10T

Abstract:
1. A method of manufacturing a power transmitting apparatus comprising: providing a clutch housing having a plurality of driving clutch plates rotatable together with an input member; connecting a clutch member connected to an output member, said clutch member having a plurality of driven clutch plates alternately arranged between the driving clutch plates of the clutch housing; mounting a pressure plate mounted on the clutch member, said pressure plate movable in an axial direction of the clutch member for carrying out pressure-contact or release of the driving clutch plates and the driven clutch plates via axial movement relative to the clutch member; fitting stopper portions in recesses formed on an inner circumferential surface of the clutch member, said stopper portions integrally projecting from the pressure plate; limiting rotation of the pressure plate relative to the clutch member; increasing the pressure-contacting force between the driving clutch plates and driven clutch plates by pressure-contact assist cams when transmission of the rotational force inputted to the input member to the output member is achieved; and releasing the connection between the driving clutch plates and the driven clutch plates by back-torque limiting cams when the rotation speed of the output member exceeds that of the input member, both the pressure-contact assist cams and the back-torque limiting cams being formed on the recesses of the clutch member and on the stopper portions of the pressure plate; and casting forming the pressure plate including the stopper portions and the clutch member including the recesses, the pressure plate and the clutch member include through windows at positions corresponding to the pressure-contact assist cams and the back-torque limiting cams by inserting pin-shaped cores into the windows to form reverse-draft surfaces of the pressure-contact assist cams and the back-torque limiting cams.