The independent suspension of the automobile is used as a movable connection, and the rear end of one or two leaf springs is extended into the bearing seat of the rear end bracket to form a sliding support. When the leaf spring is deformed under load, there is relative sliding between the plates to generate friction. It is this frictional resistance that can promote the reduction of frame vibration. Therefore, when the leaf spring is assembled, a layer of graphite grease should be applied between the plates. In order to prevent the dislocation of the leaf springs in the independent suspension and the spring can transfer the load from the main plate to the lower plates when the spring bounces back, the steel plates are clamped together with leaf spring clamps. The two sides of the steel plate clamp are connected with bolts and fastened with nuts. The bolts are sleeved with sleeves to support the two sides of the plate clamp, so as not to clamp the steel plate too tightly. In general independent suspension, the leaf springs usually use the center bolt in the center to fasten the steel plates together.
The load on the rear independent suspension of a truck varies within a large range due to the weight of the cargo carried by the truck. Sometimes it is empty or sometimes heavy. For this reason, the general measure is to use two main and auxiliary leaf springs. Grade stiffness independent suspension. The auxiliary spring does not contact its support when the load is not large, so it does not work. When the load increases to a certain level, the secondary spring and the main spring bear the load together. At this time, the stiffness of the independent suspension is the sum of the stiffness of the two secondary springs.
The shock absorber in the independent suspension will cause the frame and the body to vibrate when the car is impacted while driving, and this vibration will continue for a certain period of time until the energy of the impact is completely eliminated. In order to quickly dampen the vibration of the frame and itself, most cars are equipped with a shock absorber in parallel with the spring between the frame and the axle. Most of the shock absorbers in the independent suspension of automobiles are hydraulic. The working size principle of hydraulic shock absorber is to use the resistance of liquid flow to consume the energy of vibration. When the frame and the axle move relative to each other, and the axle jumps up or down, the liquid contained in the shock absorber shell repeatedly flows from one chamber to the other through the small holes. Since the oil flow must pass through a valve with many small holes, the oil flow has a certain resistance, so that the vibration is quickly attenuated. Therefore, a well-functioning shock absorber, when the car has been driven for some mileage, the shock absorber shell feels hot, indicating that the shock absorber is working. Otherwise, the function is bad or invalid.
