Adjustable air spring based on cam valve mechanism and its control method

Abstract

The invention discloses an adjustable air spring based on a cam air valve mechanism and a control method thereof. The upper cover plate is connected to the upper seal of the rubber air bag, the lower base is connected to the lower seal of the rubber air bag, and the cam air valve mechanism is installed on the lower seal of the rubber air bag. The joint of the lower base; the upper cover plate, the rubber air bag and the upper surface of the valve body form the main air chamber of the air spring, the lower surface of the valve body and the inner wall of the lower base form the first auxiliary air chamber and the second auxiliary air chamber, and the two auxiliary air chambers It communicates with the main air chamber through two gas passages set in the valve body; the valve seat and the air valve guide are embedded inside the valve body, and the camshaft is fixed on the top of the valve body through the camshaft seat, and the camshaft is meshed by the gear assembly through the step Driven by a motor, the camshaft is also provided with a cam; one end of the air valve stem is connected with an air valve, and the other end of the air valve stem passes through the air valve guide and is covered with an air valve spring and then resists the cam. According to the adjustment principle of the present invention, a corresponding control method is proposed, so that the volume of the air spring can be actively switched between large, medium and small, and has the advantages of stable and reliable transmission and long service life.

Description

technical field [0001] The invention belongs to the vehicle suspension system technology, and in particular relates to an adjustable air spring based on a cam valve mechanism and a control method thereof. Background technique [0002] The air spring is filled with compressed air in a sealed container, and uses the compressibility of the gas to achieve its elastic effect. Compared with traditional coil springs and leaf springs, the air spring suspension has nonlinear characteristics, which can keep the frequency deviation of the vehicle suspension and the height of the vehicle body unchanged. However, the complex structure and high manufacturing cost, coupled with the variable load, driving environment and other factors make the traditional air spring a technical bottleneck for further performance improvement. [0003] In order to break through the bottleneck, many scientific researchers and engineers and technicians have proposed new schemes. The new schemes can be summariz...

AI Technical Summary

Problems solved by technology

However, the former uses a narrow annular ventilation groove to connect the main air chamber and the additional air chamber, so the air pressure cannot be quickly balanced and there are problems such as air intake resistance, while the latter will cause fan blade misalignment when rotating the fan blade and cannot be inserted into the hollow groove correctly.

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