| 摘要 |
The present invention pertains to an auto-tensioner equipped with: a stationary member having a first tube part; a rotating member having a second tube part, at least a portion of which is arranged overlapping the first tube part in the radial direction; and a water discharge mechanism provided at the interface between the first tube part and the second tube part. The water discharge mechanism has: a water inlet that is formed by a gap between the outer circumferential surface of the first tube part and the outer circumferential surface of the second tube part, and that is open in the circumferential direction; a water passage that is formed by a gap between one of the aforementioned tube parts and a water-retaining groove formed in the circumferential direction on the outer circumferential surface of the other of the aforementioned tube parts , and that communicates with the water inlet; and at least one water discharge port formed in the outside peripheral wall of the water passage in the radial direction. |
