SPEED REDUCER GROUP, SPEED REDUCER AND DESIGN METHOD OF SPEED REDUCER

摘要

Disclosed is a speed reducer group comprising: a first speed reducer having a first crank assembly for rotating a first output unit and a second speed reducer having a second crank assembly for rotating a second output unit. The first crank assembly includes a first crankshaft having a first journal and a first eccentric portion eccentric to the first journal. The second crank assembly includes a second crankshaft having a second journal and a second eccentric portion eccentric to the second journal. The first crank assembly is different from the second crank assembly in terms of at least one among the load tolerance of a bearing installed on the first crankshaft and a distance from the central axis of rotation of the first output unit. The first crankshaft is identical to the second crankshaft in terms of shape. The speed reducer group of the present invention can reduce labor on design and logistics.