Volume adjustable air spring auxiliary air chamber

Abstract

The invention discloses a volume adjustable air spring auxiliary air chamber, relates to the technical field of vehicle air spring auxiliary air chamber, and comprises an auxiliary air chamber, a top cover, a first fan blade, a second fan blade, and a stepping motor, wherein the stepping motor is connected with a controller ECU (Engine Control Unit) through an amplifying circuit. Eight vent grooves are formed in the bottom of the auxiliary air chamber at equal intervals and distributed in a circle, and the interval between each two vent grooves is equal with the thickness of the fan blades. The structure guarantees that the air pressure is constant when the air spring auxiliary air chamber is adjusted. The change of volume of the auxiliary air chamber can be realized by controlling the rotation of the second fan blade, so as to enable the effective volume of the air spring engaged in working to be changed, and the rigidity of the air spring system is changed accordingly to adapt to various traveling condition of the vehicle, and achieve the purpose of improving the comprehensive performance of the suspension system. The chamber provided by the invention has a simple structure, is convenient to adjust and fast in adjusting speed, and less likely to break.

Description

technical field [0001] The invention relates to the technical field of an additional air chamber of an air spring for a vehicle, in particular to an additional air chamber of an air spring with a 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 parameters affecting 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 can be 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 changes. Larger, the stiffness of the air spring becomes smaller. The existing patent literature "An additional air chamb...

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Problems solved by technology

The existing patent literature "An additional air chamber with variable volume and constant internal pressure air spring" (application number 201010549005.1) and the patent "an additional air chamber for air springs with variable volume" (application number 201010549434.9), both will add air The chamber is divided into eight chambers, and its disadvantages are: changing the volume structure is relatively complicated, and the effect of changing the stiffness of the air spring with small holes is not good.

The patent "A variable-volume air spring with additional air chamber structure" (application number 201110287224.1) uses a screw to connect the piston as a way to adjust the stiffness. The problem is that the adjustment speed is slow and failures are prone to occur

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