| 摘要 |
<p>A tensioner (10) comprises a cup (21), fixed to an engine block, which has a bolt engagement portion (24) to which a pivot shaft (30) is fixed to mount an arm (50) mounting a pulley (60). The arm is biassed by a torsion coil spring (40) to rotate in a direction tensioning the belt. A sleeve is attached to the exterior of the bolt engagement portion to receive one end of a coil spring (80), the other end of which is attached to a pivot extension portion (56') of the lid. Rotation of the arm in one direction reduces the pressing force of the coil spring on the bolt engagement portion providing small rotational resistance and damping whereas rotation of the arm in the opposite direction increases that pressing force to provide increase rotational resistance and damping. <IMAGE></p> |
