Steering axle assembly is the core part of automobile steering system. Its performance is directly related to traffic and personal safety, so there are several requirements for the design of steering axle.

1. The steering axle should have certain stiffness. Ensure that the steering moment and steering angle on the steering wheel are transmitted to the steering gear.

2. Because of the improvement of highway conditions, the improvement of vehicle speed and the increasingly stringent road safety regulations, the steering axle should have the function of energy absorption and injury prevention.

3. The steering axle should have good fatigue resistance to ensure its service life.

4. The steering axles of modern automobiles are equipped with flexible universal joints, and some are equipped with mechanisms that can change the working angle of the steering wheel (the direction of the steering axle) and the height of the steering wheel (the axial length of the steering axle), so as to facilitate the manipulation of drivers of different body types.