A novel traction reducer: analysis and verification

Abstract

With the global trend of electrification and the development of high-speed motor technology, the demand for high-speed reducers has been greatly promoted. As we all know, traction drive has certain inherent advantages in high-speed transmission. Therefore, this paper takes an asymmetric loading multi-roller planetary traction drive reducer as the research object. First, the kinematics and mechanics of the reducer are analyzed theoretically. Secondly, an equivalent simulation model is established according to its unique loading principle. In addition, the kinematic characteristics of the mechanism and the contact forces of its key components are obtained through mechanical simulation. The results show that the maximum relative error between the kinematic simulation value and the theoretical value of the reducer is 0.14%, the mean absolute percentage error (MAPE) of each contact force simulation value and the theoretical value is less than 5%, which verifies the effectiveness of the loading mechanism and the correctness of the theoretical analysis. Finally, the reducer transmission test rig was designed and built, and the advantages of precision transmission were verified by testing its actual speed ratio and repeated positioning accuracy.