Leaf Spring type introduction

- Sep 20, 2018 -

Leaf Spring is one of the most widely used elastic components in automotive suspension. It is an approximate equivalent of several alloy springs of equal width but not equal length (equal thickness or unequal). Elastic beam.

Leaf springs are divided into two forms:

(1) Multi-leaf spring: It is composed of a plurality of steel sheets of different lengths and the same width. The steel plates of the multiple leaf springs are superposed 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 supporting passenger car. The thicker and thicker the steel plate, the shorter the thickness and the more rigid the spring. Big. However, when the leaf springs are used for a long time, the sheets will slide and rub against each other to generate noise. The relative friction between the steel plates can also cause the spring to deform, causing uneven travel.

(2) Less leaf spring: It is superposed by thin steel sheets of the same thickness and equal width at both ends. The section of the steel plate with a small number of leaf springs varies greatly, and the cross section from the middle to the ends is gradually different, so the rolling process is more complicated and the price is more expensive than the multi-chip spring. Compared with multi-leaf springs, the few leaf springs are about 50% lighter than the multi-chip springs under the same stiffness (ie, the same bearing capacity), which reduces fuel consumption and improves ride comfort. Moreover, there is a point contact between the few leaf springs, which reduces the relative friction and vibration and increases the ride comfort.