关键词: 商用汽车；轻量化设计；转向器摇臂轴；有限元分析；ANSYS；优化设计

Abstract: The rocker arm shaft of vehicle steering gear is a very important component in the automobile steering system. It is a security and key component of the automobile system. The rocker arm shaft is composed of one end tooth fan and one end spline, and the motion cycle is reciprocating rotary motion, so the rocker arm shaft will be subjected to certain torque to produce torsional deformation. In order to meet the lightweight requirement, on the premise of ensuring that the shear stress bearing capacity of the rocker arm shaft will not be reduced, it can be realized by cutting off the part of the rocker arm shaft that does not bear the main torque. In this paper, the rocker arm shaft was put into the ANSYS finite element analysis to analyze the force under the limit working condition under the static action, and the lightweight design of the rocker arm shaft was carried out with reference to the topology optimization results.

Key words: Commercial vehicles; Lightweight design; Steering gear rocker arm shaft; Finite element analysis; ANSYS; Optimization design