| 摘要 |
A belt tensioner for a power transmission belt system includes: (a) a base housing (16) having a pivot shaft (38) extending therefrom; (b) a tension arm (14) pivotally mounted on the pivot shaft (38) at a proximal end (42) thereof, the proximal end of the tension arm (14) including a rub surface (84) and the distal end (20) of the tension arm adapted to contact a power transmission belt (12); (c) a torsion spring (18) operatively coupled between the base housing (16) and the tension arm (14) and adapted to bias the distal end (20) of the tension arm against the power transmission belt (12); and (d) a damper assembly (76) coupled to the housing (16), the damper assembly including: (1) a body (80) of friction material that includes a friction surface (86) adjacent to and facing the rub surface (84) of the tension arm (14) and (2) a damper spring (78) integral with the body (80) of friction material and biasing the body of friction material and associated friction surface (86) against the rub surface (84) of the tension arm (14).
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