| 摘要 |
<p>A gear system 1 includes: an internal gear 12; an external gear 11; an input shaft 10 rotatably inserted into a center hole 11a formed in the external gear 11; and an anti-rotation section 19 configured to block rotation of the external gear 11. The input shaft 10 has an eccentric part 10a. The anti-rotation section 19 is formed such that the input shaft 10 is inserted into the anti-rotation section 19, and is rotatable about a center line of the input shaft 10. The gear system 1 includes: a brake 15 configured to disable movement of the anti-rotation section 19 about the input shaft 10; and a clutch system 16 configured to select one of a coupling state in which the anti-rotation section 19 and the input shaft 10 are coupled together to rotate together, and a non-coupling state in which the anti-rotation section 19 and the input shaft 10 are rotatable relative to each other.</p> |
