针对多齿啮合行星机构这种新型的传动机构，研究了其传动原理; 在此基础上，考虑偏心误差、行星齿轮相位角、弹性变形与负载对机构传动精度的影响，建立了机构随转角变化的传动精度模型，推导出其传动精度方程; 然后，利用虚拟样机技术，在ADAMS环境中进行仿真分析及验证，并进行相应的简化实验，得到该机构的输出转角误差和回差．研究表明: 仿真结果与计算结果基本一致; 与传统行星机构相比，多齿啮合机构的传动精度明显提升．

In this paper,first,the transmission principle of a new- type transmission mechanism,namely a planetarymechanism with multi- tooth meshing,was investigated. Next,based on the transmission principle, the influences ofeccentric error,gear phase angle,elastic deformation and load on the transmission accuracy of the mechanism wereanalyzed,and a model was established to describe the transmission accuracy varying with the angle,with the corre-sponding transmission accuracy equations being also deduced. Then,the virtual prototype technology was adoptedto perform a simulation and verification in ADAMS,and a simplified experiment was finally conducted to obtain theoutput angle error and the rotation error of the mechanism. It is found that the simulated results accord well with themathematical ones,and that the transmission accuracy of multi- tooth meshing mechanism is much higher than thatof the traditional planetary mechanism.