| 摘要 |
PURPOSE:To obtain a differential speed change device having a simple and cheap structure with no backlash, by meshing, with no backlash, an outer ring gear in which tooth rings are arranged at both ends of elastically deformable bellows, with inner ring gears with the use of the radial resilient force of the bellows. CONSTITUTION:Tooth rings 1, 2 of an outer ring gear 4 are arranged at both ends of elastically deformable bellows 11. Further, the outer ring gear 4 is meshed with inner ring gears 5, 6 with no backlash by use of the radial resilient force of the outer ring gear 4. Further, the eccentric motion of an eccentric rotor 9 due to the rotational drive of a drive shaft 10 is transmitted to a ring 8 and the outer ring gear 4 through a bearing 7. With this arrangement, when the tooth rings 1, 2 of the outer ring gear 3 are pressed against the inner ring gears 5, 6 during assembly, the outer ring gear 3 is meshed with the inner ring gears 5, 6 by use of the radial resilient force of the tooth rings 1, 2 due to the resiliently deforming force of the bellows 11, thereby backlash may be completely eliminated. |
