Variable-volume additional air chamber of constant internal pressure air spring

Abstract

The invention discloses a variable-volume additional air chamber of a constant internal pressure air spring in a vehicle air suspension system. An inner cavity of a cylinder body is uniformly divided into eight layers of cavities by separation plates in the axial direction of the cylinder body, a lug boss extends from the side wall of the cylinder body, a plunger piston which is not communicated with the cavity of the cylinder body is arranged in the lug boss, the bottom of the plunger piston is provided with a sealing cover which seals the bottom of the lug boss, and the sealing cover is connected with a main air chamber of the air spring through a pipeline; the plunger piston axially penetrates to the outside of the top of the lug boss in the axial direction of the lug boss and is connected with a stepping motor at the top, and an angle sensor is arranged on the top end surface of the plunger piston; the side surface of the plunger piston is circumferentially and uniformly distributed with eight semicircular grooves which correspond to the eight layers of cavities in length, small identical holes with eight centers on the same straight line are arranged on the side surface of the cylinder body, and the eight small holes are respectively communicated with the corresponding eight semicircular grooves and the eight layers of cavities; the angle sensor is connected with a controller after being electrically connected with a modulate circuit; and the controller is electrically connected with the stepping motor. The automatic fast change of the volume of the additional air chamber is achieved, thus the air spring obtains a wider rigidity variation range.

Description

technical field [0001] The invention belongs to the field of vehicle air suspension systems, and in particular relates to an additional air chamber of the air spring. Background technique [0002] The vertical stiffness and damping characteristics of the air spring in the vehicle air suspension system change with the change of the orifice aperture. When the volume of the additional air chamber of the air spring is fixed, the air spring stiffness has a small range of variation. If the variation range of the stiffness of the air spring is to be increased, the volume of the additional air chamber of the air spring should be set to be variable. At present, the volume change of the additional air chamber is only realized by manually replacing the additional air chamber with different volumes. This method cannot realize the rapid change of the additional air chamber volume, and the operation is cumbersome, the labor intensity of the workers is high, and the additional air chamber ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a volume The variable constant internal pressure air spring additional air chamber increases the variation range of the air spring stiffness when the internal pressure of the main auxiliary air chamber remains constant during the volume change of the additional air chamber

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