| 摘要 |
<p>A variable speed drive for a riding lawn mower or the like has a double pulley variable speed sheave assembly coupled between a driving pulley and a driven pulley by first and second V-belts, respectively. The sheave assembly is carried on a pivot arm pivotally mounted on a frame for the vehicle. A mechanical control linkage connected to the pivot arm is operable to shift the sheave assembly with respect to the driving and driven pulleys from a stopped position with both belts declutched through a range of low to high speed drive positions with the belts drivingly engaged. An idler pulley is carried on a spring lever assembly for engaging and variably tensioning one of the belts throughout said range of speed positions to place the belts under variable driving tension in accordance with operating speed.</p> |
