| 摘要 |
A multiple-speed gearbox for a planer. The planer includes a cutterhead mounted on an input shaft, which is driven by an electric motor, and infeed and outfeed rollers, which are driven by an output shaft. The gearbox includes a first input gear rotatable by the input shaft and a first and second output gears mounted on and independently rotatable about the output shaft. The gearbox further includes a three-gear set having a middle gear, a first outer gear and a second outer gear rotatable with a common speed. The middle gear engages the first input gear, the first outer gear engages the first output gear, and the second outer gear engages the second output gear. An actuator is operably attached to the multiple-speed gearbox to selectively engage the output shaft with one of the first and second output gears when the actuator is moved in a first or second axial direction respectively.
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