| 摘要 |
PURPOSE: To prevent intrusion of foreign matter such as muddy water, even under a strict environment such as high speed car washing, in a pulley unit A equipped on auxiliary machines of an automobile. CONSTITUTION: This pulley unit is constituted of a pulley 1, a shaft body 2 disposed relatively rotatably with the pulley 1 and concentrically on the inside of the pulley 1, a one-way clutch 3 interposed into an annular space S between the pulley 1 and the shaft body 2, rolling bearings 4 and 5 adjacently provided in a shaft direction of the one-way clutch 3 in the annular space S, inside annular seals 61 and 62 provided on the outside of the rolling bearings 4 and 5 to seal the annular space S, and an outside annular seal 8 provided on the outside of the inside annular seals 61 and 62 to seal the annular space S. In the outside annular seal 8, a lip 8b in provided at a tip, a base end part 8a is fixed to either one of an inner peripheral surface of the pulley 1 or an outer peripheral surface of the shaft body 2, and the lip 8b is brought into contact with the other. |
