| 摘要 |
<p>A dual ratio drive (10) has a primary drive train with driven element (12), the driven element (12) being mounted on an output shaft (13) and connected to the output shaft (13) by a sprag clutch (14) for direct drive in one direction. The driven element (12) is also connected to the output shaft (13) by a second clutch (29) and an epicyclic gear mechanism (20), the epicyclic gear mechanism (20) being arranged to drive the output shaft (13) in said one direction at a drive ratio of greater than 1:1. <IMAGE></p> |
