A Novel Wheel-side Drive System with Reducer Based on Gear-pole Composite Mechanism

10.6567/IFToMM.14TH.WC.OS6.009

Cheng Gu；Bao-Gui Qiu；Jun Yin；Shao-Ming Qian；Xin-Bo Chen

Gear-pole composite mechanism ； Servo motion ； Unsprung mass ； Ride comfort ； Speed ripple ； Optimization objectives

Proceedings of the 14th IFToMM World Congress

14th-2（2015 / 10 / 27）

194 - 198

英文

Aiming at the negative effects of in-wheel motored electric vehicle caused by heavy unsprung mass, a novel drive system with wheel-side reducer based on gear-pole composite mechanism was proposed in this paper. Taking the motor mass as sprung mass, the vertical relative movement of motor and wheel is decoupled by the servo motion of transmission system without universal joint or shaft, owning the advantages of simple structure and high efficiency. Compared with the architecture of in-wheel motor drive system, simulation results verified that the drive system proposed in this paper improved the ride performance in the human sensitive frequency range of 4-8Hz in MATLAB. Furthermore, taking the wheel speed ripple and longitudinal displacement under vibration as the optimization objectives, the mechanism parameters are designed and optimized with ADAMS/Insight under constraints, and the results proved the feasibility of the proposed architecture. At last, prototype structure designs are preceded in detail.