Active type coil spring suspension

Abstract

The invention discloses an active type coil spring suspension which comprises a spring pre-tightening force regulating device, a suspension height regulating device and a shock absorber (15), wherein the spring pre-tightening force regulating device comprises an upper spring seat (8), a coil spring (12), a lower spring seat (13), a pull rod (11), a pre-tightening driven gear (9) and a pre-tightening power device; the pre-tightening driven gear (9) is rotatably arranged on the upper spring seat (8) through upper and lower bearings (10); the pull rod (11) is connected with the pre-tightening driven gear (9) through thread fit and passes through the upper spring seat (8), the coil spring (12) and the lower spring seat (13); the lower end of the pull rod (11) is provided with a limit clamping piece (14); and the pre-tightening power device is matched with the pre-tightening driven gear (9). After adopting the structure, the coil spring suspension has the advantages of simple structure, light weight, small volume, low failure rate, low production cost, convenient maintenance, good stability, active regulation capability of the spring pre-tightening force and the suspension height, and the like.

Description

technical field [0001] The invention relates to an automobile suspension, in particular to a coil spring suspension that realizes suspension soft and hard adjustment and actively adjusts suspension height by actively adjusting spring preload. Background technique [0002] With the continuous improvement of the research and development level of automobile manufacturing, people have higher requirements for the handling and comfort of automobiles. Among them, the vehicle shock absorption system plays a vital role. In the general suspension structure, elastic elements are used to bear and transmit vertical loads, and alleviate the impact on the body caused by uneven road surfaces. The types of elastic elements include leaf springs, coil springs, torsion bar springs, oil and gas springs, air springs and rubber springs. The shock absorber is used to attenuate the vibration caused by the elastic system. The types of the shock absorber include the cylindrical shock absorber, the ne...

AI Technical Summary

Problems solved by technology

But its shortcomings are also very obvious. The main shortcomings are its complex structure, the entire suspension is heavy, it takes up a lot of space, and the production cost is very high; and the unsafe factors are also obvious, and it seems relatively very "fragile" ", due to the complex structure of the system, the probability and frequency of failure are high, and the use of air as the "propulsion power" to adjust the height of the chassis requires further improvement in the sealing of the shock absorber. If there is air leakage in the air shock absorber, Then the whole system will be in a state of "paralysis".

Moreover, if the height of the chassis is adjusted frequently, it may cause local overheating of the air pump system, which will greatly shorten the service life of the air pump.

In addition, due to its complex structure and large space occupation, it is very difficult to retrofit this system on an existing car that is not equipped with this air active suspension system.

[0008] In response to the above problems, many scientific research institutes, manufacturers and people of insight have carried out development and research, but so far there is no ideal way to solve the above problems

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