(1) Multi-leaf spring: consists of multiple steel sheets with different lengths and the same width. The steel plates of multiple leaf springs are superimposed into an inverted triangle shape. The uppermost steel plate is the longest, and the lowermost steel plate is the shortest. The number of steel plates is related to the weight of the passenger car. The more steel plates, the thicker and shorter, the more rigid the spring. Big. However, when the leaf spring is used for a long time, the pieces will slide and rub against each other to generate noise. The relative friction between the steel plates can also cause the spring to deform and cause uneven driving.
(2) Few leaf springs: superimposed by steel sheets with thin ends and thickness in the middle, equal width and equal length. The section of the steel plate of the small leaf spring changes greatly, and the section from the middle to the two ends is gradually different, so the rolling process is more complicated and the price is more expensive than that of the multiple leaf spring. Compared with the multi-leaf spring, the less-leaf spring is about 50% lighter than the multi-leaf spring under the same stiffness (that is, the same load-bearing capacity), which reduces fuel consumption and increases driving comfort. In addition, the single leaf of the few leaf springs are in point contact, which reduces relative friction and vibration and increases ride comfort.