Is the load-bearing performance of independent suspension axle good?

Suspension is a force transfer connecting part between the frame and the axle, and it is also an important part to ensure the safety and driving comfort of the vehicle. For freight vehicles, suspension and axle are the key to the strength of the load bearing performance of the vehicle.

The independent suspension axle, also known as the broken axle, is different from the ordinary non-independent suspension axle with the whole axle. The two sides of the wheel ends are respectively installed on the body through their own suspension, and the middle is connected by a joint structure, so the two sides of the wheels can achieve relative movement and do not affect each other.

From the style of independent suspension alone, it can be subdivided into the following categories:

1. Single-arm independent suspension

At present, it is rarely used in the front suspension, and its main feature is that when the suspension is deformed, the wheel plane is easy to tilt, change the wheel base on both sides of the wheel, and affect the adhesion of the tire and the ground. In addition, when the suspension is used in the steering wheel, it is easy to make the kingpin Angle and wheel camber Angle have a large change, which has a certain influence on the steering control.

2, double cross arm independent suspension

This kind of independent suspension is widely used in the front wheel of the car, and its upper and lower swinging arms are not equal in length, which can control the Angle of the wheel and the kingpin and the change of the wheel base. The upper arm is shorter than the lower arm. When the wheel moves up and down, the motion curvature of the upper arm is smaller than that of the lower arm, which can achieve slight internal and external movement of the upper part of the tire, while the bottom influence is small, which is conducive to reducing tire damage and improving the ride comfort and directional stability of the vehicle.

3, single longitudinal arm type independent suspension

If the steering wheel uses a single longitudinal arm independent suspension, the wheel jumping up and down will cause a great change in the rear Angle of the kingpin, so the single longitudinal arm independent suspension is generally used for the rear wheel that does not steer.

4, double longitudinal arm type independent suspension

This form of suspension is suitable for the steering wheel, and its two longitudinal arms are generally made of equal length to form a parallel four-link mechanism, and the rear Angle of the kingpin remains unchanged when the wheel is jumping up and down.

Because the independent suspension axle replaces the middle axle beam connection, the installation position of the engine can be lowered or moved forward, the center of gravity of the vehicle is lower, and the driving stability is stronger. In addition, the wheels on both sides of the design of their own suspension system, one side of the wheel bumps at the same time, the other side of the wheel can remain independent from involvement, can reduce the body by bumps and vibrations, in the complex, bad road conditions are stronger.

However, the independent suspension axle frame is not without shortcomings, the poor bearing performance is on the one hand, after all, the lack of the middle shaft structure, in response to the transportation of goods is somewhat inadequate.

In contrast, although the design of the non-independent suspension axle is simpler, the shock resistance and passability are not as good as the independent suspension, it can provide greater load and torque, daily maintenance and maintenance are more convenient, and it is more suitable for the use of freight vehicles, such as heavy goods vehicles, trailers, semi-trailer load Bridges generally use non-independent suspension axles.

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