Analysis of the characteristics of torsional stiffness of RV reducer

The RV reducer, which is widely used in the robot joint, was studies as the research object. The geometric model is constructed based on the structural features of RV reducer, and the FEA model is also established considering bearing stiffness, meshing stiffness of gears, and elasticity of components on the platform of ANSYS. The variation of torsional stiffness, which is generated in a period of rotation of the crank shaft, is compared with the experimental results in order to certify the validity and computational accuracy of the model. By applying this FEA model, the effect of bearing stiffness and the mating tooth number between cycloidal gear and pin gear is further analyzed. The result indicates that the bearing stiffness is the dominant factor that affects the torsional stiffness. Considering the nonlinear variation of the bearing stiffness can reveal the characteristics of torsional stiffness more precisely. ©, 2015, Tianjin University. All right reserved.