| 摘要 |
<p>A propeller drive assembly, particularly for a power boat, comprises a rotatable input shaft (8), a first driving gear (10) fixed to a casing (2), a free drive gear (12) journalled for rotation on the input shaft, planet gears (18) interconnecting the first driving gear and the free drive gear, the planet gears being journalled on pins (16) carried fixedly by the propeller hub (6), further comprising clutch means (20) in driving connection with the input shaft and selectively operable to connect the input shaft to the propeller hub or the free drive gear. The connection of the clutch with the propeller hub causes the hub to rotate at the speed of the input shaft whereas connection of the clutch with the free drive gear causes the propeller hub to be driven at a reduced speed dictated by the planet wheel gears via the pins.</p> |
