A Kind of Independent Air Suspension for Small and Medium Buses

Abstract

The invention discloses an independent air suspension for a small-and-medium-sized passenger car. The independent air suspension for the small-sized and medium-sized passenger car comprises a supporting arm located outside a frame, an upper swing arm assembly, a lower swing arm, an air bag assembly and a damper installation component, wherein an air bag installation base seat is arranged at the top end of the supporting arm, an upper swing arm rotary shaft hole place is arranged on the upper portion of the supporting arm, a wheel side assembly main pin hole place is arranged on the middle portion the supporting arm, and a lower swing arm rotary shaft through hole is formed in the lower portion the supporting arm; a supporting arm end of the upper swing arm assembly is connected to the upper swing arm rotary shaft hole place, and a frame end of the upper swing arm assembly is connected to the upper portion of the frame; a supporting arm end of the lower swing arm is connected to a lower swing arm rotary shaft hole place, and a frame end of the lower swing arm is rotationally connected to the lower portion of the frame; the air bag assembly is fixed on the air bag installation base seat; and the top end of the damper installation component is fixed on the frame, and the bottom end of the damper installation component is fixed on the middle portion of the lower swing arm. The installation structures of the supporting arm, an upper swing arm, the lower swing arm and the air bag assembly can be given sufficient direction rotating space when a brake chamber is pre-posed; and the automatic adjustment of the height of a car body can be achieved through the application of the air bag assembly. According to the independent air suspension for the small-sized and medium-sized passenger car, a torsion bar independent suspension used in an existing same car is completely replaced on the premise that a car body is not changed.

Description

technical field [0001] The invention relates to the technical field of vehicle engineering, in particular to an independent air suspension mainly used in small and medium passenger cars. Background technique [0002] With the continuous increase of vehicle speed, the non-independent suspension is increasingly unable to meet the requirements of vehicle ride comfort and handling stability. Therefore, with the advancement of automobile production technology, independent suspension came into being and achieved great development. [0003] The main feature of independent suspension is that the wheels on both sides of the frame or body are independently elastically connected to the frame or body. The most common vehicle independent suspension at present is the double wishbone suspension, and the upper swing arm and the lower swing arm of the double wishbone suspension can be of equal or unequal length. For the unequal-length double-wishbone suspension, the upper upper swing arm a...

AI Technical Summary

Problems solved by technology

However, the connection between the disconnected steering axle and the frame commonly used at present requires a transition arm, so a certain amount of space is required in the chassis layout, which is difficult to achieve under the premise of the compact space in front of the engine.

Based on the above-mentioned difficulties, the technical development of the front independent suspension of small and medium-sized passenger cars is still in a blank in China.

[0005] At present, in the suspension selection of small and medium passenger cars in the domestic market, in addition to a large number of non-independent suspensions using leaf springs, the independent suspension products are all imported torsion bar independent suspensions. The independent suspension adopts the virtual kingpin technology. The steering knuckle is specially developed for foreign countries. There is no such virtual kingpin steering knuckle in China, and the redevelopment cost is very expensive.

Since there are no other independent suspension products in China that can be replaced, they can only be purchased through imports, and the price is high. In order to reduce the cost of the whole vehicle, on the premise of ensuring the performance of the suspension, the market urgently needs a new type of domestic independent suspension to replace imported ones. torsion bar independent suspension

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