Abstract: In the field of new energy vehicles, electric power steering system is one of its core technologies. As an important part of the electric power steering system, the contact characteristics of the worm gear and its transmission efficiency directly affect the performance of the steering system. Therefore, the worm pair in an electric power steering system is taken as the research object. The solid model is modeled by KISSsoft software, and then the solid model is imported into HyperMesh software for mesh generation. Finally, the rotation process of the worm pair is simulated by ABAQUS software, and the static contact analysis is carried out at different positions in the process. The contact stress distribution law of the meshing tooth surface of the worm pair when the worm wheel rotates one tooth is studied. The contact strength of the meshing surface is checked, and the influence of the friction coefficient of the worm pair tooth surface on the transmission efficiency is analyzed.

Key words: ABAQUS; Worm gear; Electric power steering system; Contact analysis; Finite element analysis; KISSsoft

摘要： 在新能源汽车领域，电动助力转向系统是其研发的核心技术之一。蜗轮蜗杆作为电动 助力转向系统的重要部件，其齿面接触特性和传动效率的好坏，直接影响转向系统性能的好 坏。为此，以某电动助力转向系统中的蜗杆副为研究对象，利用 KISSsoft 软件对其进行实体 建模，然后将实体模型导入 Hypermesh 软件中进行网格划分，最后通过 ABAQUS 软件模拟了 蜗杆副的转动过程，并对这个过程中的不同位置进行静力学接触分析，研究了蜗轮转动一个 齿时，蜗杆副啮合齿面的接触应力分布规律，校核了其啮合面的接触强度，并分析了蜗杆副 齿面摩擦系数对传动效率的影响。

关键词: ABAQUS；蜗轮蜗杆；电动助力转向系统；接触分析；有限元分析；KISSsoft