| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multistage speed-change tool which can select a speed reduction ratio at three or more stages, and can cope with work in which load torque is abruptly varied while minimally suppressing a loss of a work time. <P>SOLUTION: A reduction gear 2 having a plurality of speed-change stages which are switchable in reduction ratio by the slide of a moving member in the axial direction is arranged between a motor 1 and an output shaft, and a speed-reduction member 35 for sliding the moving member is arranged. By operating the speed-change member 35 and sliding the moving member, the reduction gear 2 can change speed from a first speed up to a third speed. Then, as a speed-change order of the reduction gear 2 by the speed-change member 35, there is arranged a second speed-change order for changing speed by skipping one speed or more in addition to the first speed-change order which sequentially changes speed in a one-by-one speed order. <P>COPYRIGHT: (C)2012,JPO&INPIT |
