This paper reported the designed approaches of cycloidal mechanisms, studied its dynamic forces and failure characteristics using finite element methods (FEM). A simplified cycloidal mechanism (CM) is constructed to fulfill dynamic analysis and reliability evaluation. The studied results show that the loads of the mechanism are shared mainly by a half of the outer rollers and the inner pins. The possible failures of the mechanism will occur at the inner pins caused by the bending stress, and at the cycloid disc induced by the contacting stress. The failure of the inner pins will dominate the damage of the mechanism. A method of evaluating stress variation is proposed for fulfilling reliability design. The stress variations are derived according to the data in dynamic analysis by regression analysis. The methods of design modification are reported for improve the reliabilities. The allowable loads of the CM can be decided accordingly based on the analyzed information.

本文报道了摆线机构的设计方法，使用有限元方法（FEM）研究了其摆力和破坏特性。构造了简化的摆线机构（CM）以实现动态分析和可靠性评估。研究结果表明，该机构的负载主要由一半的外辊和内销分担。该机构可能发生的故障将在弯曲应力引起的内销处以及在接触应力引起的摆线盘处发生。内销的故障将主导机构的损坏。为了实现可靠性设计，提出了一种评估应力变化的方法。根据动态分析中的数据通过回归分析得出应力变化。报告了设计修改的方法以提高可靠性。可以基于分析的信息相应地确定CM的允许负载。