| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve rotation accuracy to reduce the noise and the vibration of external tooth gears by further enhancing the strength of the external tooth gears and reducing the spring constant difference according to the circumferential positions (phases) of the external tooth gears in a distribution type rocking inner gearing reduction gear. <P>SOLUTION: This rocking inner gearing type reduction gear Go includes a plurality of eccentric body shafts 21 having first and second eccentric bodies 31A, 31B and penetrating first and second external tooth gears 12A, 12B in positions offset from the centers of the first and second external tooth gears 12A, 12B. The reduction gear Go also includes a pair of first and second carrier bodies 42A, 42B provided on both axial sides of the first and second external tooth gears 12A, 12B to twin-support the eccentric body shafts 21 rotatably, and a plurality of carrier pins 71. The axial thickness d1 of the first and second external tooth gears 12A, 12B at the radial outer portions of carrier pin holes 94 is formed thicker than the axial thickness d2 at portions that circumferentially adjoin the radial outer portions. <P>COPYRIGHT: (C)2013,JPO&INPIT |
