汽车转向中间轴扭转刚度差异性分析

Analysis of Differences in Torsional Stiffness of Steering I-Shaft

中间轴是转向系统中连接转向管柱和转向机、可以传递扭矩并吸收路面激励的一种机械传动机构。车辆在启动和行驶中,转向系统由驾驶员实时操控。中间轴上接转向管柱,下接转向机,由于具备两个万向节,是整个转向系统应力最集中的位置。扭转刚度表征转向轴系抵抗路面载荷而发生自身弹性形变的能力,所以中间轴扭转刚度是一个衡量整车性能的重要参数,其最小刚度一定要严格受控。鉴于此,介绍了汽车转向中间轴扭转刚度测试及数据差异性分析。

The I-shaft is a mechanical transmission mechanism in the steering system that connects the steering column and the steering gear to transmit torque and absorb road excitation.During the starting and driving of the vehicle,the steering system is controlled by the driver in real time.The I-shaft is connected to the steering column above and the steering gear below.With two universal joint,it is the most stress concentrated position of the entire steering system,Torsional stiffness is the ability of the steering shaft system to resist road loads and undergo its own elastic deformation.Therefore,the torsional stiffness of the intermediate shaft is an important parameter to measure the performance of the entire vehicle,and its minimum stiffness must be strictly controlled.