| 摘要 |
PROBLEM TO BE SOLVED: To realize a structure capable of restraining frictional heat and worn powder generated at overrunning of a roller clutch 10 and exhibiting enhanced durability. SOLUTION: Ball bearings 25 are used as a pair of supporting bearings provided between an inner peripheral surface of a driven pulley 7a and an outer peripheral surface of a sleeve 24. A holder 37 for the clutch is prevented from being displaced along an axial direction by axial engagement of both end surfaces 42 of the holder 37 for the clutch installed in the roller clutch 10 with axially inner end surfaces of holders 40 for the bearing installed in the ball bearings 25. With this structure, friction by axial deformation is restrained and the purpose is attained. |
