| 摘要 |
Provided is a deceleration device capable of supporting an undulating third crown gear in a highly rigid manner and further capable of improving efficiency. The deceleration device according to the present invention is provided with: a first crown gear 1; a second crown gear 2; a third crown gear 3 that has facing teeth 3a facing the first crown gear 1 and facing teeth 3b facing the second crown gear 2 and being arranged back to back to the facing teeth 3a; and cam parts 11, 12 that cause undulation of the third crown gear 3. The cam parts 11, 12 include a first cam 11 arranged closer to the first crown gear 1 than the third crown gear 3 and a second cam 12 arranged closer to the second crown gear 2 than the third crown gear 3. The third crown gear 3 is sandwiched between the first cam 11 and the second cam 12, first rolling bodies 15 are interposed between the first cam 11 and the third crown gear 3 in a rotatable manner, and second rolling bodies 17 are interposed between the second cam 12 and the third crown gear 13 in a rotatable manner. |
