| 摘要 |
A tensioner comprising a shaft (2), a base (4), a pivot arm (11) pivotally engaged with the base, a pulley (12) journalled to the pivot arm, a first spring (5) urging a first damping member (6) into a frictional engagement with the pivot arm, the first spring engaged with the base, the first damping member imparting a damping force greater in a first pivot arm direction than in a second pivot arm direction, and a second spring (9) disposed in the pivot arm and urging a second damping member (10) into a frictional engagement with a base surface (42), the base surface comprises an arcuate form having a radius that is variable from a minimum value to a maximum value. |
