| 摘要 |
PROBLEM TO BE SOLVED: To provide a clutch device which achieves further reduction in drag torque, and to provide a method for reducing the drag torque of the clutch device, and a clutch friction plate used for the clutch device. SOLUTION: The clutch device 100 includes flat plate annular clutch plates 103 and clutch friction plates 110 arranged alternately, and clutch oil between the clutch plates 103 and the clutch friction plates 110. The clutch friction plate 100 includes small groove groups 113 formed of a plurality of small grooves 113a in parallel with each other ranging from the inner peripheral side to the outer peripheral side of a core metal 111 and fan-like grooves 114 formed adjacently to the small groove groups 113 and widened toward the outer peripheral side from the inner peripheral side of the core metal 111 on the surface of the flat plate annular core metal 111. During the rotation of the clutch friction plates 110, the clutch device 100 guides the clutch oil existing on the inner peripheral side of the core metal 111 to the outer peripheral side from the inner peripheral side of the core metal 111 via the small groove groups 113 and the fan-like grooves 114. COPYRIGHT: (C)2011,JPO&INPIT |
