行星牵引传动的行星轮弹性设计与分析

Design and Simulation of Elastic Planetary Wheel in Planetary Traction Drive

采用中空弹性行星轮结构,通过行星轮的弯曲弹性变形提供传动副之间的压紧力。对中空弹性行星轮进行力学分析,计算出最小压紧力,并建立应力、应变的数学模型。运用AN-SYS Workbench有限元分析软件建立有限元模型,通过分析行星轮壁厚与径向变形量、等效应力的关系,得到了最佳行星轮壁厚。为检验中空弹性行星轮的可靠性,对其进行动态仿真,仿真结果验证了所设计的中空弹性行星轮是一种合理可靠的结构。

Loading of the clamping force is the key to the design of planetary traction drive mechanism. This paper designs a type of planetary traction reducer with center hollow flexible planetary wheel, and the clamping force is supplied by planetary wheel＇ s bending deformation. Based on the mechanical analysis about center hollow flexible planetary wheel, the minimum clamping force and mathematical modal of stress-strain are obtained. A finite element analysis model established in AN- SYS Workbench and the best wall thickness is obtained by analyzing the relationship between wall thickness of planetary wheel, radial deformation and equivalent stress. To test the reliability of this design, dynamic simulation of the center hollow flexible planetary pinion is established, and the simulation results verify the reliability of this structure.