针对目前环式减速传动在使用过程中轴承承载能力较低、容易失效等问题，提出一种由渐开线行星齿轮传动和渐开线少齿差行星传动组合而成的两级新型双曲柄内齿环行星减速器。在对该减速器结构形式、传动原理及受力情况进行分析的基础上，为分析其承载能力，建立了此新型传动形式的有限元接触分析模型。通过接触分析计算，得出齿面接触等效应力和实际接触齿对数，并在此基础上，对新型双曲柄内齿环行星减速器内啮合传动齿轮副进行了齿廓修形与有限元接触重分析。结果表明，修形后的传动齿轮副的承载能力得到了明显提高,具有工程实用性。

To address the problems of low carrying capacity and short life of bearings in current ring reducers, a new type of ring reducer is proposed which consists of a twostepped transmission. One is a planetary transmission, and the other is an Ntype planetary transmission with a low tooth number difference. Based on the analysis of structural features, the transmission principle, and a transmission load situation, a contact finite element model of the new type of ring reducer is set up, and the stress value and the actual pairs of meshing teeth are derived by calculation. Based on gear modification research theory, the second stage transmission gear pairs of the new reducer are modified on its teeth profiles. Results demonstrate that the load capacity of transmission gear pairs have been enhanced greatly.

国家“十一五”科技支撑计划资助项目（2006BAF01B0701）；新世纪优秀人才计划资助项目（NCET050766）;长江学者和创新团队发展计划资助项目(IRT0763);重庆市科技攻关计划资助项目(2008AC3087)