关键词: 重型卡车；转向系统；多连杆机构；优化设计；强度分析

Abstract: In order to reduce the angle error of the multi-link steering system of a heavy truck and determine the structural strength of the steering mechanism, the multi-body dynamics model of the multi-link steering system of a heavy truck is established. Using the steering system dynamics model, firstly, the kinematics analysis of the steering system is carried out to determine the steering angle error of the steering system, and the mechanism with the smallest steering error of the steering system is solved by adopting the experimental design method. Secondly, the dynamic analysis of the steering system is carried out, and the maximum force of the steering system bar is obtained, and the structural strength of the steering system is optimized by using the finite element method. The results show that the steering error of the steering system is obviously reduced and the reliability of the steering system is improved. The performance of steering system meets the design requirements of a truck.

Key words: Heavy truck; Steering system; Multi-link mechanism; Optimization design; Strength analysis