Shock absorber assembly.
The shock absorber assembly is composed of shock absorber, lower spring pad, dust jacket, spring, shock absorber pad, upper spring pad, spring seat, bearing, top glue and nut. The shock absorber assembly is divided into four parts: front left, front right, back left and back right. The position of the support lug at the bottom of each part of the shock absorber (the Angle connected to the brake disc) is different. Therefore, when selecting the shock absorber assembly, it is necessary to identify which part of the shock absorber assembly. Most of the front reduction on the market is a shock absorber assembly, and the rear reduction is still an ordinary shock absorber.
Different from shock absorbers
1.
Different composition
The shock absorber is only a part of the shock absorber assembly; The shock absorber assembly consists of a shock absorber, lower spring pad, dust jacket, spring, shock absorber pad, upper spring pad, spring seat, bearing, top rubber and nut. [2]
2. The replacement difficulty is different
Replacing the independent shock absorber is difficult to operate, requiring professional equipment and technicians, and the risk factor is large; The shock absorber assembly is easily replaced with just a few screws.
3. Price difference
It is expensive to replace individual parts of the shock absorber kit separately; The shock absorber assembly, which contains all the components of the shock absorber system, is cheaper than replacing all the components of the shock absorber.
4. Different functions
A separate shock absorber has only the function of shock absorption; The shock absorber assembly also plays the role of the suspension pillar in the suspension system.
Working principle
The shock absorber assembly is mainly used to suppress the shock when the spring rebounds after absorbing the shock and the impact from the road surface, and to counter the torsional vibration of the crankshaft (that is, the phenomenon of the crankshaft twisting under the impact force of the cylinder ignition).
In order to improve the ride comfort of the car, shock absorbers are installed in parallel with the elastic components in the suspension system. In order to attenuate vibration, hydraulic shock absorbers are generally used in the shock absorber system. The working principle is that when the relative motion between the frame (or body) and the axle is affected by vibration, the piston in the shock absorber moves up and down. The oil in the shock absorber cavity repeatedly flows from one cavity through different pores into another cavity.
The structure of the shock absorber is a piston rod with a piston inserted into the barrel, which is filled with oil. The piston has a throttle hole so that the oil in the two parts of the space separated by the piston can supplement each other. Damping is produced when the viscous oil passes through the throttle hole, the smaller the throttle hole, the greater the damping force, the greater the viscosity of the oil, the greater the damping force. If the size of the throttle hole is unchanged, when the shock absorber is working at a high speed, excessive damping will affect the absorption of the shock. [1]
The shock absorber and the elastic element bear the task of shock mitigation and shock absorption, too large damping force will make the suspension elasticity deteriorate, and even make the shock absorber connector damaged. Therefore, it is necessary to adjust the contradiction between the elastic element and the shock absorber.
(1) In the compression stroke (the axle and frame are close to each other), the damping force of the shock absorber is small, so as to give full play to the elastic role of the elastic elements and mitigate the impact. At this time, the elastic element plays a major role.
(2) In the suspension stretch travel (the axle and the frame are far away from each other), the damping force of the shock absorber should be large and the shock absorption should be rapid.
(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 kept within a certain limit to avoid excessive impact load.
Product action
The shock absorber assembly uses the fluid to convert the elastic energy of the spring into heat energy, so that the convergence of vehicle movement is the most reasonable, so as to eliminate the vibration brought by the road to improve the driving stability, and give the driver a sense of comfort and stability. [2]
1. Inhibit the vibration transmitted to the body during driving to improve the ride comfort
Buffer the impact communicated to the driver and passengers to improve ride comfort and reduce fatigue; Protect the loaded cargo; Extend body life and prevent spring damage.
2. Inhibit the rapid vibration of the wheel when driving, prevent the tire from leaving the road, and improve the exercise stability
Improve the driving stability and adjustment, effectively transmit the engine deflagellation pressure to the ground, in order to save fuel costs, improve the braking effect, extend the life of each part of the car body, and save the maintenance cost of the car.
Fault checking method
The shock absorber assembly is a vulnerable part in the use of the car, the shock absorber oil leakage, rubber damage, etc., will directly affect the smoothness of the car and the life of other parts, so we should make the shock absorber often in good working condition. The shock absorber can be tested in the following ways:
1.
Make the car stop after driving 10km on the road with poor road conditions, and touch the shock absorber shell with your hand. If it is not hot enough, it indicates that there is no resistance inside the shock absorber and the shock absorber does not work. If the shell is hot, it is a lack of oil inside the shock absorber. In both cases, new shock absorbers should be replaced immediately.
2.
Press the bumper hard, and then release, if the car has 2 to 3 jumps, it means that the shock absorber is working well.
3.
When the car is driving slowly and braking in an emergency, if the car vibration is more severe, it indicates that there is a problem with the shock absorber.
4.
Remove the shock absorber upright, and the lower end of the connection ring clamped on the pliers, pull the pressure damping rod several times, at this time there should be stable resistance, pull up (recovery) resistance should be greater than the resistance to the downward pressure, such as unstable or no resistance, may be the shock absorber internal lack of oil or valve parts damaged, should be repaired or replaced parts.
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