| 摘要 |
PROBLEM TO BE SOLVED: To provide a reduction gear series which can further improve the power transmission performance of each reduction gear belonging to the series while suppressing a construction cost of the series as a whole.SOLUTION: In a reduction gear series having a plurality of frame numbers a, b which are regulated by a magnitude of transmission torque, and a plurality of eccentrically-oscillating type reduction gears 12 different in reduction ratios L, H at the frame numbers a, b, each reduction gear 12 comprises an inner tooth gear 14, an outer tooth gear 16, an eccentric body 34 for eccentrically oscillating the outer tooth gear, and eccentric body bearings 40 arranged between the eccentric body and the outer tooth gear. At the frame number a, the eccentric body bearings 40aL and 40aH different in diameters at the reduction gear 12aL of a low reduction ratio L and the reduction gear 12aH of a high reduction ratio H are used, and the eccentric body bearing 40aH for the reduction gear (small-high reduction gear) 12aH of the high reduction ratio H at the small frame number a is used as the eccentric body bearing 40bL for the reduction gear (large-low reduction gear) 12bL of the low reduction ratio L at the larger frame number b. |
