Sheet springs are widely used in automobile non - independent suspension. The steel plate spring is composed of several alloy spring steel pieces with different lengths and superimposed to form an elastic beam with approximately equal strength. The longest piece is called the main piece, and its two ends are rolled into a roll ear with a bushing inside. It is hinged with a bracket or lifting ear fixed on the frame using a spring pin.
Each spring piece is connected with the center bolt, and the relative position of each piece is guaranteed. The distance between the center bolt and the center of both ends of the rolling lug can be equal, which is called symmetric plate spring; They can also be unequal, called asymmetric leaf springs.
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