A hydraulic interconnected isd suspension

Abstract

The invention relates to a vehicle hanger bracket, in particular to a hydraulic interconnection ISD (Inerter-Spring-Damper) hanger bracket. Hydraulic cylinders of a rear overhang hydraulic ISD hanger bracket are reversely connected in series, namely, the upper cavity of the left side hydraulic cylinder and the lower cavity of the right side hydraulic cylinder are connected, and the lower cavity of the left side hydraulic cylinder and the upper cavity of the right side hydraulic cylinder are connected; when the bounce directions of left and right wheels are consistent, liquid interaction is realized by a connecting pipe, and the loads borne by the two side wheels are balanced; when the bounce directions of left and right wheels are inconsistent, liquid is capable of converting the pressure difference between the upper cavity and the lower cavity into an inertia force by a hydraulic motor, the dynamic stroke of the hanger bracket is reduced, and the aim of preventing sidesway of a vehicle is reached. On the basis of an antiresonance technology of the hydraulic ISD hanger bracket, and through the combination of the interconnection sidesway prevention, the hydraulic interconnection ISD hanger bracket has the advantages that for a complicated work condition road, under the premise that the riding comfort is not influenced by negative effects, the vehicle driveability is improved, the coordination control is realized for the smoothness and the handling stability, four modalities relative to the movement of a vehicle body, of wheels are independently decoupled by an interconnection hanger bracket system, and the structure is simple and reliable, the cost is low and the implementation is easy in comparison with a driving hanger bracket.

Description

technical field [0001] The invention relates to a vehicle suspension, in particular to a hydraulic interconnected ISD suspension. Background technique [0002] The chassis suspension system of large-scale engineering vehicles mostly adopts oil-pneumatic suspension, and oil-pneumatic suspension is generally divided into two types: independent type and connected type; connected type oil-pneumatic suspension system can reduce the natural frequency of the body and facilitate vehicle attitude adjustment, and Compared with the independent oil-pneumatic suspension system, its vehicle roll stiffness is greater, the vehicle driving stability is better, and it is more widely used on large engineering vehicles. At the same time, the proposal of a new structural system of "inertia-spring-damping" suspension (ISD suspension) not only broadens the research space of suspension, but also brings about a change in the design method of suspension. The appearance of the inerter makes the "iner...

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Problems solved by technology

[0003] Chinese patent CN 201320343948.8 discloses a utility model patent for a hydraulically interconnected suspension system that does not have air bubbles in the hydraulic branch when in use; one improves the anti-rolling of the vehicle body by properly coupling the oil-pneumatic springs or air springs of each wheel performance, which greatly improves the ride comfort, driving stability and vehicle passability of the vehicle, but the structure of the oil-gas spring is more complicated and the cost is higher. Since the working medium is high-pressure gas and oil, the surface roughness, assembly accuracy, and durability of the relative moving parts The abrasiveness and the design of the sealing link put forward higher requirements, and special inflating equipment and operating procedures are required to inflate the air chamber in time to ensure the airtightness. The gas is easy to leak slowly during use, and maintenance is more troublesome.

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