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Steering Shaft Performance Test

The function of the steering shaft is to transfer the steering torque of the driver to the steering wheel to the steering gear. The upper part of the steering wheel is fixed to the steering wheel, and the lower part is connected to the steering gear. The steering shaft runs through the steering column and supports the bearing and bushing in the cylinder. Some steering shafts not only have certain rigidity, but also have the function of absorbing energy, play the anti - injury.

The design requirements

The steering shaft assembly is the core part of the steering system, and its performance is directly related to traffic and personal safety, so there are several requirements for the design of the steering shaft.

1. The steering shaft should have certain rigidity. Ensure that the steering torque and steering Angle on the steering wheel are transferred to the steering gear;

2. Due to the improvement of highway conditions, the improvement of speed and the increasingly strict laws and regulations on road safety, the steering shaft should have the function of absorbing energy and playing the anti-injury function.

3. The steering shaft should have good fatigue resistance and ensure its service life.

4, modern automobile steering shaft in addition to the flexible universal joint, sometimes with can change the work of the steering wheel Angle (steering shaft transmission direction) and the height of the steering wheel, steering shaft axial length) of the organization, to facilitate the driver's manipulation of different size.


The steering shaft structure is simple, easy to manufacture, and has anti - injury effect.

The steering shaft with anti - wound action

The steering shaft with anti - wound action

On the steering shaft is divided into two segments, the lower end of the steering shaft after forming, its axis and spindle axis offset distance between the end face and welding has two circular cylindrical pin head of fastening plate welding, two cylindrical pin on the center line of symmetry for steering shaft of the main axis. Steering shaft under a T glyph, its top is connected with a die casting, die casting on the casting have two hole, hole pressure of rubber and plastic bushing and the steering shaft again after barbed shaped connection, constitute a safety steering shaft. During the use of the shaft, the axial force of the upper and lower steering shaft can be removed automatically to ensure the safety of the driver.

Steering tester performance test

In the automotive industry standard - "vehicle steering shaft assembly performance requirements and test methods" (QC/t649-2000), the test of the steering shaft is provided. The main test contents include: assembly gap test, rotational torque test, sliding spline dynamic test, static torsion strength test and reverse fatigue life test.