关键词: 万向节；转速波动；灵敏度分析；双十字轴；Adams/Insight；优化设计

Abstract: The cross universal joint is simple in structure, reliable in transmission, and allows a large included angle between the two transmission shafts. Therefore, the automobile steering system uses the cross universal joint to transmit motion. When there is an angle between the input shaft and the output shaft, the angular velocity between the input shaft and the output shaft is different. For the steering system using universal joint to transmit motion, there is non-linearity between the input of steering wheel and the output of tire angle, which affects the driving quality. It is important to reasonably arrange the steering joint phase angle. Based on a double cross universal joint steering column, the causes of universal joint transmission speed fluctuation are analyzed. The front suspension half car model is built according to the given parameters, and the influence of different steering joint phase difference on the fluctuation is analyzed based on Adams/Car and Adams/Insight. The influence contribution of different phase angle on the steering fluctuation is identified iteratively, and the universal joint fork is further optimized to reduce the input-output shaft speed fluctuation and improve the steering quality of the whole car.

Key words: Universal joint; Speed fluctuation; Sensitivity analysis; Double cross; Adams/Insight; Optimization design