| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetary gear device capable of suppressing noise and abrasion of gears with a simple constitution.SOLUTION: A planetary gear device 10 includes a sun gear 11, a planetary gear 14 engaged with the sun gear 11, and a first ring gear 17 and a second ring gear 26 engaged with the planetary gear 14. Each of the gears is a conical gear having tapered teeth. The planetary gear 14 is disposed in a state of being axially held by the first ring gear 17 and the second ring gear 26. An axial distance of the first ring gear 17 and the second ring gear 26 is adjusted by adjusting means. According to this constitution, backlash of the ring gears 17, 26 and the planetary gear 14 can be eliminated by adjusting only the axial distance between the first ring gear 17 and the second ring gear 26. |
