Automobile composite board spring

Abstract

The invention belongs to the field of automobile parts and particularly relates to an automobile composite board spring. The automobile composite board spring comprises a steel plate sprig piece located on the upper portion and at least one composite material spring piece located on the lower portion. The steel plate sprig piece and the composite material spring pieces are overlaid up and down and are connected into a whole through fasteners. According to the automobile composite board spring, the composite structure of the steel plate sprig piece and the composite material spring pieces is adopted, structure design is reasonable, the effect is significant, when the automobile composite board spring is installed on an automobile chassis and road jolts are transmitted to the spring through an axle, the high-strength composite material spring pieces absorb most vibration through elasticity of the composite material spring pieces, and good vibration reducing performance is achieved. The steel plate sprig piece mainly achieves the effects of connection with an automobile body and bearing of a small quantity of torsion and shear stress caused by steering and braking, and thus overall strength is ensured. Composite materials are light, so that the weight of the whole automobile board spring is reduced, and the effects of weight reducing, emission reducing and load increasing are very significant.

Description

technical field [0001] The invention relates to an automobile composite leaf spring, which belongs to the field of automobile accessories. Background technique [0002] Automobile leaf spring (an elastic element widely used in automobile suspension) is a safety component that connects the axle and the body through different types of shock absorbers. Attached directly to the body, it can also be mounted directly on the shock absorber. At present, the vast majority of automobile leaf springs are made of spring steel through a series of complex processes such as heat treatment. The weight of each group is about 50-500 kg, and the vehicle has at least four groups, with a total weight of about 200-2000 kg. Lightweight (reducing emissions and increasing load at the same time) is a major issue in the automobile industry. If the weight of the automobile leaf spring is too heavy, it will increase fuel consumption and reduce the loading capacity of the automobile. Therefore, the weig...

AI Technical Summary

Problems solved by technology

At present, the vast majority of automobile leaf springs are made of spring steel through a series of complex processes such as heat treatment. The weight of each group is about 50-500 kg, and the vehicle has at least four groups, with a total weight of about 200-2000 kg. Lightweight (reducing emissions and increasing load at the same time) is a major issue in the automobile industry. If the weight of the automobile leaf spring is too heavy, it will increase fuel consumption and reduce the loading capacity of the automobile. Therefore, the weight reduction of automobile leaf springs has become a major research point

[0003] In this regard, a lot of research has been carried out at home and abroad, and variable-section leaf springs have been developed. The use of variable-section leaf springs has indeed achieved certain results in reducing the weight of automobiles, usually reducing the weight by 10-20%. The complexity of the process, so the production cost is seriously increased, and it is not easy to popularize and apply

[0004] Foreign countries have been trying to replace steel leaf springs with non-metallic composite leaf springs in recent years. However, due to the characteristics of poor wear resistance and anisotropic properties of composite materials, their unidirectional tensile strength is usually excellent, but torsion, shear, etc. Therefore, when it is connected with the axle and the lifting lug of the car body, it is easy to be damaged, so that the car has a major safety hazard, so it has not been able to be popularized and used.

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