Precautions for refitting springs
As far as cars are concerned, elastic elements mostly refer to coil springs. They only bear vertical loads and mitigate and suppress the impact of uneven roads on the car body. They have the advantages of small occupied space, small mass and no lubrication. However, they can not play the role of vibration reduction because they have no friction.
The spring supports the vehicle body and absorbs the impact of uneven road surface and other forces on the tire. The so-called other forces here include the forces exerted on the spring by acceleration, deceleration, braking, turning, etc. More importantly, in the process of eliminating vibration, it is necessary to maintain the continuous contact between the tire and the road and maintain the tracking of the car.
The modified spring not only strengthens the hardness, but also reduces the height of the vehicle. However, to reduce the height of the vehicle, the length of the spring must be shortened. However, if the length of the spring is reduced too much, the spring will be free in the telescopic stroke of the shock absorber (in serious cases, the spring will fall off when the vehicle is jacked up). Therefore, in order to avoid the above situation, most refitted springs will shorten the length of the spring within an appropriate range, or adopt the design of unequal spacing up and down when the length remains unchanged, that is, the spring is designed in the form of dense at one end and sparse at the other end.
Generally, the refitting springs on the market use springs with equal upper and lower spring diameters, but some high-end refitting products use two groups of springs, one long and one short, on a damping cylinder. This design can provide two elastic coefficients and provide good support effect on the premise of ensuring comfort; Second, it can ensure that the length of the spring can meet the telescopic stroke of the shock absorber.
When refitting the spring, it should be noted that many people will only replace the spring instead of the shock absorber. This refitting method is easy to deteriorate the control, because the damping of the original shock absorber can not bear the hardness of the refitted spring. Therefore, when the spring has a telescopic effect, the original shock absorber can not restrain the movement of the spring in such a short time, Such a result will lead to the vehicle bouncing, which will not only make the refitting effect of the spring difficult to play, but also shorten the service life of the original shock absorber.
