二级同轴双曲柄行星传动承载能力分析

In view of the problems of vibration, loud noise in current ring reducers and high load in turning arm bearing, the need of special output device in cycloidal pinwheel reducers, a two-step coaxial double-crank planetary transmission is proposed which is consisted of an involute transmission and a cycloidal pinwheel transmission. The structural feature and transmission principle are analysed;The force analysis modal of the system is built up and the force and the bearing life is carried out; The contact strength of cycloidal pinwheel of the second step is analysed using FEA. The result indicates that under rated condition,the weak link of the transmission is the inside supporting bearing on the crankshaft due to the high periodical and alterative load; there are five pairs of meshing teeth and the max mises stress is 126.3 MPa. In conclusion ,the transmission satisfies the design request.