Automobile shock absorber principle

- Nov 20, 2019-

First, the structural diagram of the automobile shock absorber is as follows:

1. In the car suspension, the shock absorber is always used with the spring. When we press down a corner of the body, the actual compression is the spring, and the corresponding swing arm swings. When the body is released, the body rebounds under the spring force. At this time, the shock absorber dampens the spring rebound, that is, it tends to stabilize after rebound.

2. If there is no shock absorber, the spring will be compressed again and rebound after rebounding, which shows that the body tends to stabilize after repeated rebounds. Therefore, the shock absorber is used to dampen the shock absorption of the spring of the car suspension when rebounding.

2. When the shock absorber is compressed, the piston descends, the volume of the upper chamber increases, the volume of the lower chamber decreases, the circulation valve opens, and the oil in the lower chamber enters the upper chamber through the circulation valve; at the same time, a part of the oil opens the compression valve and enters the storage cylinder. . The throttling action of the two valves on the oil causes the damper to exert a damping effect during the compression movement.

3. When the shock absorber is extended, the piston goes up, the volume of the upper chamber decreases and the volume of the lower chamber increases, the extension valve opens, and the oil in the upper chamber enters the lower chamber through the extension valve; at the same time, a part of the oil is opened for compensation, and is stored. The cylinder enters the lower chamber. The throttling action of the two valves on the oil causes the damper to exert a damping effect during the extension movement.

Extended information:

The shock absorber and the elastic element bear the task of cushioning and damping. If the damping force is too large, the suspension will be elastically deteriorated and even the shock absorber connector may be damaged. The contradiction between the elastic element and the shock absorber is adjusted due to the surface.

1. In the compression stroke (the axle and the frame are close to each other), the damping force of the shock absorber is small, so as to fully exert the elastic action of the elastic member and mitigate the impact. At this time, the elastic member plays a major role.

2. During the suspension extension stroke (the axle and the frame are away from each other), the damping force of the shock absorber should be large and the vibration can be quickly absorbed.

3. When the relative speed between the axle (or wheel) and the axle is too large, the shock absorber is required to automatically increase the liquid flow so that the damping force is always within a certain limit to avoid excessive impact load. .