| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetary gear device which achieves increase in torque by using a repulsive force of a permanent magnet.SOLUTION: A planetary gear device 80 includes: a rotation auxiliary plate 40 which rotates by a revolving motion of a planetary gear 34; and a fixing auxiliary plate 42 provided in a non-contact manner on an outer periphery of the rotation auxiliary plate 40. Then, at the fixing auxiliary plate 42, a plurality of fixing side magnet 46 are installed tilting toward the rotation direction of the rotation auxiliary plate 40, and at the rotation auxiliary plate 40, a plurality of rotation side magnets 44 are installed tilting toward the direction opposing to the fixing side magnet 46. Then, between the rotation side magnets 44 and the fixing side magnets 46, a repulsive force acts toward the rotation direction of the rotation auxiliary plate 40. By this repulsive force, the rotation auxiliary plate 40 is pushed to the rotation direction and supports the rotation of a planetary carrier 36. Thereby, the torque of a driven shaft 14 can be increased.SELECTED DRAWING: Figure 1 |
