| 摘要 |
A tensioner comprising a base ( 20 ), a pivot arm ( 30 ), a pulley ( 90 ) journalled to the pivot arm, a torsion spring ( 10 ) engaged between the base and the pivot arm, the torsion spring biasing the pivot arm, the torsion spring comprising a cross-sectional form having a major axis (Z-Z) and a minor axis (X-X), the major axis having a length (h) greater than a minor axis length (b), the torsion spring comprising planar portions ( 15,16 ) which are substantially parallel with the major axis, and the major axis oriented in a direction that extends substantially radially and normally from a torsion spring winding axis (Y-Y).
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