| 摘要 |
PROBLEM TO BE SOLVED: To provide a planet mechanism which can achieve a large reduction gear ratio while suppressing an increase in weight. SOLUTION: The planet mechanism 10 comprises: a sun gear 11 as an input; a fixed ring gear 12; a planet carrier 13 as an output; and a planet gear unit 14 supported by the planet carrier 13. The planet gear unit 14 comprises: a shaft 17; a first planet gear 15 which is connected to the shaft 17, and engaged with the sun gear 11; and a second planet gear 16 which is connected to the shaft 17, and engaged with the ring gear 12. The planet gear unit 14 rotates around a first rotating shaft 14x with respect to the planet carrier 13. The planet carrier 13 rotates around a second rotating shaft 13x. The first rotating shaft 14x crosses the second rotating shaft 13x. COPYRIGHT: (C)2009,JPO&INPIT
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