Longitudinal FRP plate spring body and assembly structure thereof

Abstract

The invention provides a longitudinal FRP plate spring body and an assembly structure thereof. Area of cross sections on any position from two ends of the FRP plate spring body to the middle part, thecross sections being vertical to a thickness intermediate surface, is equal, so as to ensure continuity and homogeneity of reinforced fibers from one end of the body to the other end in the FRP platespring body. Thicknesses from the middle part to two ends along lengths directions are gradually reduced, so as to ensure uniformity of stress. Cross section area is not changed, and width of a plateend is properly reduced, so as to reduce stress generated by combining the end of the FRP plate spring body and a connecting piece. The FRP plate spring body can greatly improve endurance and reducestress on each position. Bench test number reaches more than one million times which is more than 10 times of life of an existing steel plate spring. Compared with a steel plate spring, about 70% weight can be reduced. The longitudinal FRP plate spring body is advantaged by good vibration damping performance, relatively high corrosion resistance, and good safe fracturing property. The longitudinalFRP plate spring assembly structure comprises the longitudinal FRP plate spring body, an upper cover plate, a lower supporting plate, a rubber mat, and end lugs. The FRP plate spring body and the assembly structure thereof have functions of existing varied longitudinal steel plate springs.

Description

technical field [0001] The invention belongs to the field of automobile suspension, in particular to a longitudinal FRP leaf spring body and its assembly structure. Background technique [0002] Leaf springs can be placed vertically or horizontally on the car. The latter must be provided with an additional guiding force transmission device to transmit the longitudinal force, which makes the structure complex and the quality increased, so it is only used in a small number of light and miniature vehicles. Vertical leaf springs can transmit various forces and moments, have a guiding function, and have a simple structure, so they are widely used in automobiles. The main types of modern longitudinal leaf springs are as follows: figure 1 shown. [0003] In the prior art, the middle part of the leaf spring 3' needs two U-shaped bolts 4' to be fixed on the axle 5', and the front end is fixed to the vehicle body 1' (vehicle frame) through the front roll ear 31' and the front bracke...

AI Technical Summary

Problems solved by technology

However, the product has a single shape and low transverse strength, so few manufacturers adopt it.

[0011] Although the reliability life of the vertical FRP leaf spring in the prior art is slightly longer than that of the leaf spring, but due to the high cost of the vertical FRP leaf spring, its use cost is of course relatively high, which is difficult for users to accept, and most manufacturers are only in the research stage

At the same time, the existing vertical FRP leaf springs are all single-leaf leaf springs, with one stiffness, it is difficult to meet the needs of vehicles with large load changes and different stiffnesses.

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