| 摘要 |
Disclosed herein is a stern drive unit including a stationary housing adapted to be fixed relative to a boat hull and a movable housing mounted on the stationary housing for pivotal movement about a tilt axis which is substantially horizontal when the stationary housing is fixed to the boat hull. The stern drive unit also includes a propulsion leg including a rotatably mounted propeller, an input shaft in the stationary housing transverse to the tilt axis, and an output shaft journaled in the movable housing and having an axis transverse to the tilt axis, generally intersecting the tilt axis, and connected to the propeller. The stern drive unit also includes a reversing transmission connected to the input and output shafts for selectively controlling operation of the propeller, the reversing transmission including a transfer gear supported for rotation coaxially with the tilt axis, spaced bevel gears mounted for rotation coaxially with the transfer gear, a first clutch pack for selectively connecting and disconnecting the transfer gear to one of the bevel gears, and a second clutch pack for selectively connecting and disconnecting the transfer gear to the other of the bevel gears. The stern drive unit further includes a first gear mounted on one of the input shaft and the output shaft in mesh with the transfer gear, and a second gear mounted on the other of the input shaft and the output shaft and in mesh with both of the spaced bevel gears.
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