Twisted bar heilical spring compound suspension frame device

Abstract

A composite suspension device for torsion bar coil springs comprises two symmetrical suspension devices with double wishbones, wherein each suspension device comprises a suspension support (5), a telescopic shock absorber (4), an upper suspension lever (3) and a lower suspension lever (3), a main flexible element employs a coil spring (1) and a supplementary element uses a torsion bar spring (9). The invention can be used for rear axles of off-road vehicles. The suspension system realizes large travel, heavy load and variable rigidity characteristic, simultaneously reduces processing difficulty of coil springs, decreases shear stress which each elastic element receives in operational process, thereby prolonging the service life of coil springs, increasing reliability of the suspension system and the entire car and decreasing processing and manufacturing costs of the suspension system.

Description

technical field [0001] The invention relates to a suspension technology on a heavy-duty off-road vehicle, more specifically, it is a torsion bar coil spring composite suspension device. Background technique [0002] Due to the simple structure, convenient manufacture and high specific energy capacity of the coil spring, it is quite common to use it as an elastic element in the suspension of cars below light (especially cars). After inquiry, the OSHKOSH series high-mobility off-road vehicles in the United States have adopted coil spring independent suspensions; in China, many cars produced by joint ventures have adopted McPherson-style coil spring independent suspensions, and the Dongfeng "Sweat Horse" off-road vehicles with a load of about 1t (4×4) adopt double-wishbone coil spring independent suspension, and 515 wheeled chariot also adopts linear coil spring independent suspension. The load and stroke of their suspension are small, and the off-road capability of the vehicle...

AI Technical Summary

Problems solved by technology

After inquiry, the OSHKOSH series high-mobility off-road vehicles in the United States have adopted coil spring independent suspensions; in China, many cars produced by joint ventures have adopted McPherson-style coil spring independent suspensions, and the Dongfeng "Sweat Horse" off-road vehicles with a load of about 1t (4×4) adopt double-wishbone coil spring independent suspension, and 515 wheeled chariot also adopts linear coil spring independent suspension. The load and stroke of their suspension are small, and the off-road capability of the vehicle cannot meet high maneuver request

[0003] In addition, the sprung mass of the rear axle suspension in the no-load state of high-mobility off-road vehicles is far less than that in the full-load state. In order to meet the ride comfort requirements of the vehicle under different loads, the rear axle suspension must adopt a large stroke, heavy load, and variable stiffness. Coil spring, which will inevitably increase the difficulty of manufacturing the coil spring, greatly increase the processing cost of the suspension coil spring, and reduce the pass rate of the product, thereby reducing the reliability of the suspension system and even the entire vehicle and increasing the cost

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