Air spring auxiliary chamber with variable air volume

Abstract

The invention discloses an air spring auxiliary chamber of a vehicle air suspension, which has a variable volume. N separators are arranged in a cylindrical cylinder body to uniformly divide a cylinder body inner cavity into n small chambers along the axial direction; a center shaft extends into the cylinder body from the outside of one end of the cylinder body and is inserted in center holes of the n separators; the first separator is tightly attached to the other end face of the cylinder body; the same position on each separator is provided with a sector through hole which is coaxial with the center holes; the middle of each separator is provided with a cylindrical hollow slot which is coaxial with the center holes; a sector valve plate is arranged in each cylindrical hollow slot; all the sector valve plates are axially in rigid connection with the center shaft in a spiral manner along the center shaft; one end of the center shaft positioned outside the cylinder body is connected with a stepping motor and an angle sensor is arranged on the end face of the one end of the center shaft; and when the center shaft rotates by a certain angle every time, different sector valve plates are driven to seal the corresponding sector through holes, so that automatic and rapid change of the volume of the auxiliary chamber is implemented and an air spring obtains a large rigid variation range.

Description

technical field [0001] The invention belongs to the field of vehicle air suspension systems, in particular to an air spring additional air chamber of the air suspension. Background technique [0002] The stiffness and damping characteristics of the air spring in the vehicle air suspension system change with the opening of the throttle valve. If the volume of the additional air chamber of the air spring is fixed and cannot be adjusted, the stiffness variation range of the air spring is relatively small. To increase the range of air spring stiffness, the air spring additional chamber can be designed to be adjustable. At present, volume adjustment is mainly achieved by replacing additional air chambers with different volumes. This method cannot achieve rapid changes in additional air chambers, is inconvenient to operate, and labor-intensive, and cannot accurately and quickly obtain the volume change of the additional air chambers. The stiffness characteristics of the air spri...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems in the above-mentioned prior art that the range of air spring stiffness is small and the volume of the additional air chamber cannot be adjusted quickly, and to improve the change of air spring stiffness to meet the time lag and accuracy and propose a method that can The structure of the air spring with variable volume and additional air chamber meets the requirements of increasing the range of stiffness of the air spring while improving the time lag of the volume adjustment of the additional air chamber of the air spring and the accuracy requirements for the stiffness of the air spring

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