| 摘要 |
PURPOSE: A multi-stage type planetary gear is provided to be used as a speed reducer and an accelerator by changing the gearing scheme of a planetary gear. CONSTITUTION: A sun gear(140) receives the rotational force of a power source. A plurality of planetary gears(130) are geared in the sun gear. A ring gear(100) is geared in a plurality of planetary gears. A carrier(150) is combined in the rotary axis of the planetary gear and is rotated at an angular speed corresponding to the revolution speed of the planetary gear.
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