Air spring appending air chamber structure with variable volume

Abstract

The invention discloses an air spring appending air chamber structure with variable volume for a vehicle, and the structure comprises a cylindrical appending air chamber cavity body of which the two ends are provided with openings, wherein the middle axle of the inner cavity of the appending air chamber cavity body is provided with a screw rod of which the upper end is connected with an external driving device; the screw rod in the appending air chamber cavity body is sheathed with a piston by a screw rod pair, the outer wall of the piston is tightly matched with the inner wall of the appending air chamber cavity body, and the appending air chamber cavity body is divided into an effective volume cavity and a spare volume cavity; the whole inner wall of the appending air chamber cavity body is provided with a piston rotation-limiting groove along the axial direction, and the edge of the piston is provided with a protruding part which is clamped in the piston rotation-limiting groove; the inner wall of the appending air chamber cavity body is provided with three vent grooves at interval along the axial direction; and a gap between every two vent grooves and the thickness of the piston are equal. The air chamber structure provided by the invention has the advantages of simple structure and small volume, and can be used for effectively and reliably achieving the variable volume ofthe appending air chamber.

Description

technical field

[0001] The invention relates to an additional air chamber of an air spring for vehicles, in particular to an air spring additional air chamber with variable volume. Background technique

[0002] The air spring utilizes the compressibility of the gas to achieve its elastic effect, and has the functions of buffering and vibration isolation. The stiffness of the air spring is one of the key components that affect the comfort of the car. In order to make the automobile air suspension adapt to various complex working conditions of the vehicle, the stiffness characteristics of the spring are changed by changing the volume of the additional air chamber of the air spring. The volume of the additional air chamber has a significant impact on the stiffness characteristics, and the volume of the additional air chamber becomes larger. The air spring stiffness becomes smaller.

[0003] The patent application number is 201010549005.1, the name is "a kind of variable volume...

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