Air spring testing device

Abstract

The invention discloses an air spring testing device which comprises a working table (1), a first cylinder (2) connected with an air source, a tension and pressure sensor (3) and a grating ruler displacement sensor (5). A piston rod of the first cylinder (2) can push a tested air spring to extend and contact, the grating ruler displacement sensor (5) is used for measuring the route of the air spring (4), and a controller (6) and a displayer (7) are arranged on the working table (1). The air spring testing device can perform detection on airtightness, accuracy, service life and force value changing during the route of the air spring.

Description

Technical field [0001] The invention relates to the technical field of gas springs, in particular to a gas spring testing device. Background technique [0002] The gas spring is an industrial accessory that can support, buffer, brake, height adjustment and angle adjustment. It consists of the following parts: pressure cylinder, piston rod, piston, seal guide sleeve, filler (inert gas or The principle of the gas spring is to fill the sealed pressure cylinder with inert gas or oil and gas mixture, so that the pressure in the cavity is several or tens of times higher than the atmospheric pressure, and the cross-sectional area of ​​the piston rod is smaller than The pressure difference generated by the cross-sectional area of ​​the piston realizes the movement of the piston rod. [0003] Evaluation of the quality of a gas spring is mainly considered from the following aspects. The first is its sealing performance. If the sealing performance is not good, oil and air leakage will occur ...

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Problems solved by technology

[0003] The evaluation of the quality of a gas spring is mainly based on the following aspects. The first is its sealing. If the sealing is not good, there will be oil leakage and air leakage during use. The second is the accuracy. For example, it needs 500N For gas springs, the force error produced by some manufacturers does not exceed 2N, and the products of some manufacturers may be far from the actual 500N; the second is the service life, and its service life is calculated by the number of times it can be fully retracted. The force value changes during the stroke. Ideally, the force value of the gas spring should remain constant throughout the stroke, but due to design and processing factors, the force value of the gas spring during the stroke inevitably changes, and its change The range is an important criterion to measure the quality of a gas spring, the smaller the range of change, the better the quality of the gas spring, and vice versa

[0004] However, there is currently no device that can detect the tightness, accuracy, service life, and force value changes in the stroke of the gas spring, so that the quality of the gas spring produced cannot be guaranteed.

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