Composite material-made plate spring and automobile

Abstract

The invention relates to the field of automobile technology and relates to a composite material-made plate spring and an automobile. The composite material-made plate spring comprises an arched plate spring body and rigid connection members installed on two ends of the plate spring body, wherein the plate spring body is made from fiber reinforced composite material; a groove is formed in each rigid connection member; two ends of the plate spring body are respectively inserted into the grooves; a boss is arranged on the upper surface of each rigid connection member; and a through hole for a pin roll for connection between each rigid connection member and a vehicle frame lug. With the above arrangements and a fixed distance between centers of front and back vehicle frame lugs, longitudinal length of the plate spring body can be increased and a contact area between the plate spring body and the rigid connection member can be increased. Longitudinal force born by the plate spring body can be greatly shared by the rigid connection members and stress action points and action directions of the plate spring body during brake can be changed, so shearing force born by the plate spring body can be reduced and fatigue life can be prolonged and safety performance can be enhanced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a composite leaf spring and an automobile. Background technique [0002] The current trucks, especially those with two or more rear axles, traditionally use steel leaf springs as a buffer and damping structure, but the steel leaf springs themselves are very heavy, which increases the weight of the vehicle, thereby increasing It increases the fuel consumption rate and has an adverse effect on the handling stability of the vehicle. In addition, steel leaf springs are usually composed of no less than one piece of spring steel, and the inevitable friction between adjacent spring steels will shorten the life of the steel leaf spring. Due to the requirements of large load, low fuel consumption and good handling stability, leaf springs made of composite materials have been widely used. Compared with similar steel leaf springs, composite leaf springs have the characteristics of lig...

AI Technical Summary

Problems solved by technology

However, during the braking process of the whole vehicle, the brake shear force borne by the leaf spring is relatively large, and due to the influence of the assembly space of the frame, specifically the limitation of the center distance of the front and rear frame lugs, in the structure It is difficult to connect the composite material leaf spring to the metal parts, which makes the connection method and structural design of the composite material leaf spring and metal parts particularly important. If the structure is unreasonable, during the reliability test of the whole vehicle, The composite leaf spring will be cut off by the metal parts used as roll ears and the bolts used to connect the composite leaf spring, thus destroying the composite leaf spring and affecting the safety performance of the vehicle

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