Combined air spring integrated with coil spring with additional air chamber with adjustable volume

Abstract

The invention provides a combined air spring integrated with a coil spring with an additional air chamber with the adjustable volume. The combined air spring comprises an upper covering plate, a pouch leather, a lower covering plate, the additional air chamber, an additional air chamber piston, a piston rod and a linear stepper motor. The upper covering plate, the pouch leather and the lower covering plate form an air spring, and an air spring cavity of the pouch leather is filled of high-pressure air. The additional air chamber is mounted on the lower covering plate in the an air spring cavity and is in a cylindrical shape. The additional air chamber has an opening end and an enclosed end, and the enclosed end contacts with the lower covering plate. The center of the additional air chamber is located on the central connecting line of the upper covering plate and the lower covering plate. The additional air chamber is provided with the additional air chamber piston which is capable of performing reciprocating motions freely, and the additional air chamber piston is connected with the upper covering plate through the piston rod fixed on the additional air chamber piston. The effective volume of the additional air chamber is formed by the additional air chamber piston and the enclosed end of the additional air chamber.

Description

Technical field: [0001] The invention belongs to the field of air spring devices for vehicles, in particular to the field of an integrated composite air spring with an adjustable additional air chamber volume. Background technique: [0002] With the development of automobiles and other transportation technologies, people have higher requirements for the ride comfort of vehicles. With its own unique properties, air springs have been more and more widely used in the vehicle industry in compliance with this requirement. [0003] The volume of the air spring has a significant impact on its stiffness characteristics. Zhu Sihong and others from Nanjing Agricultural University in China proposed in the paper "Mechanical Parameter Test of Air Spring with Additional Air Chamber" that as the volume of the additional air chamber of the air spring increases, the stiffness of the air spring becomes smaller. The paper "Experimental Research on Influencing Factors of Dynamic Stiffness of A...

AI Technical Summary

Problems solved by technology

When the vehicle rolls seriously, even if the volume of the additional air chamber is adjusted, the air spring stiffness cannot be rapidly increased, resulting in obvious rolling motion of the vehicle, which makes the occupants feel uncomfortable, and the tires have poor ground contact, which seriously affects the ride comfort and handling of the vehicle. stability

The existing technology combines coil springs and air springs ZL201110168358.1, so that the vehicle uses air springs under normal working conditions, and the volume of the air springs can be adjusted through liquid to change the stiffness of the air springs. When the suspension height changes greatly Use a coil spring with greater stiffness; but it also has problems such as gas-liquid sealing difficulties and system self-heaviness

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