| 摘要 |
The speed reducer has a simple gear mechanism, and a plurality of planetary gears so that it can reduce the size of the gear box and transmit a large force. While sun gears (1,1'), fixed to an input shaft (4), rotate, the sun gear (1) makes a speed reduction guidance part (B) rotate and the other sun gear (1') makes the other speed reduction guidance part (A) rotate. As a result, the two rotational guidance parts (B,A) offset each other in the part (C), and the remaining rotation is guided to idling.
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