Reduction gear group, reduction gear and reduction gear design method

摘要

To provide a technology capable of manufacturing a speed reducer under application of a small number of types of bearing.SOLUTION: This patent application discloses a group of speed reducer comprising: a first speed reducer having a first crank assembly for oscillating a first oscillation gear to rotate a first output part around a first main shaft by performing a rotating motion around a first transmitting shaft spaced apart by a first distance only from the first main shaft defined as a rotating central shaft of the first output part; and a second speed reducer having a second crank assembly for oscillating a second oscillation gear to rotate a second output part around a second main shaft by performing a rotating motion around a second transmitting shaft spaced apart by a second distance only different from the first distance from the second main shaft defined as a rotating central shaft of the second output part.SELECTED DRAWING: Figure 1A