| 摘要 |
PURPOSE:To reduce the size and weight of a differential planetary gear device by rotatably supporting a rotary internal gear on a casing or a fixed internal gear through a bearing. CONSTITUTION:A sun gear 18 is mounted on the first shaft 15, and a fixed gear 14 is concentrically disposed on the sun gear 18. Further, there is provided at least one planetary gear 9 engaged with the sun gear 18 and the fixed gear 14. On the other hand, a rotary internal gear 23 having a little difference in number of teeth from the gear 14 is provided on the gear 14, and the second shaft 16 is co-axially connected to the rotary internal gear 23. Further, there are provided the first bearing 27 for rotatably supporting the second shaft 16 and the second bearing 24 for supporting the rotary internal gear 23. Thus, a differential planetary gear device can be reduced in size and weight. |
