| 摘要 |
Disclosed herein is a self-propelled lawn mower including a blade housing, a plurality of wheels adapted for supporting the blade housing, at least one of the wheels being adapted to serve as a drive wheel, a blade mounted for rotation within the blade housing, a prime mover supported on the housing, a drive shaft mounted for rotation relative to the housing and adapted for connection to the drive wheel for driving the drive wheel, and a transmission means mounted on the blade housing. The transmission means includes a rotatable first gear drivingly connected to the prime mover, a pair of driven gears rotatably mounted in meshing engagement with the first gear and driven by the first gear in opposite directions, and means for alternatively and selectively connecting the driven gears to the drive shaft for rotatably driving the drive shaft in different rotational directions.
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