| 摘要 |
A tensioner for a power transmission belt that is adapted to be operated in an endless path, and a method of making the same. The tensioner comprises a support unit (36, 41) for being fixed relative to the belt (21), a belt engaging unit (38) carried by the support unit (36, 41) and movable relative thereto, a mechanical spring unit (39) operatively associated with the support unit (36, 41) and the belt engaging unit (38) for urging the belt engaging unit (38) relative to the support unit (36, 41) and against the belt (21) with a force to tension the belt, and a fluid dampening unit (40) operatively associated with the support unit (36, 41) and the belt engaging unit (38) to dampen the movement of the belt engaging unit (38) relative to the support unit (36, 41) in at least one direction of movement thereof. The fluid dampening unit (40) comprises a rotary dampening unit. The rotary dampening unit (40) and the spring unit (39) are coaxially aligned. The support unit (36, 41) has an opening (42) passing therethrough for receiving a fastening member (43) that will fasten the support unit (36, 41) to a vehicle bracket (37) or the like. The opening (42) is disposed coaxially through the rotary dampening unit (40) and the spring unit (39). |
