Patent ID: 8167108
Filing Date: 2012-05-01
Classification: B62K,F16F

Abstract:
1. A clutch comprising: a clutch inner mounted to be rotated around a shaft; a clutch outer mounted to be rotated around the shaft and that houses the clutch inner and that transmits or interrupts torque between the clutch outer and the clutch inner, wherein the clutch outer includes a flat outer surface extending in a radial direction outward from an outer peripheral surface of the shaft, the clutch outer includes a thick portion formed therein that has a larger thickness than other portions of the clutch outer and becomes thicker as the thick portion extends outwardly in the radial direction, the clutch outer includes a position-of-center-of-gravity adjusting portion formed in the flat outer surface and the thick portion at a position separate from an axial center of the shaft to bring a center of gravity of the clutch close to the axial center of the shaft, the position-of-center-of-gravity adjusting portion includes a hole extending in a direction parallel to the axial center of the shaft, the clutch outer includes a plurality of friction plates and the clutch inner includes a plurality of clutch plates, and the hole overlaps with the plurality of friction plates of the clutch outer in the direction parallel to the axial center of the shaft.