| 摘要 |
A belt tensioner (10) for tensioning a drive belt or timing belt (16) comprises an eccentric adjusting member (18) having an end surface thereof constructed and arranged to be mounted directly in surface-to-surface engagement with respect to a belt tensioner mounting surface for an engine frame (12). A pivoted structure (30) is mounted on the eccentric adjusting member (18) for pivoted movement between a first position and a second position, and a belt tensioning pulley (90) is mounted for rotational movement on the pivoted structure (30). A coil torsion spring (50) is constructed and arranged to resiliently bias the pivoted structure (30) in a belt tightening direction away from the first position and toward the second position, the eccentric adjusting member (18) being movable during an installation procedure to move the pivoted structure (30) against the bias of the coil torsion spring (50) into a position wherein the belt tensioning pulley (90) is disposed in predetermined static tensioning relation with the belt (16), at which point the eccentric adjusting member (18) is to be manually fixed. The end surface of the eccentric adjusting member (18) is in sliding surface-to-surface relation with the mounting surface (12) during rotation of the eccentric adjusting member (18).
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