阅读说明：本技术 一种三气室单阻尼的油气弹簧装置 (Three-air-chamber single-damping hydro-pneumatic spring device ) 是由 许同乐 张涵 张亚靓 邹方豪 张静 于 2019-11-12 设计创作，主要内容包括：本发明公布了一种三气室单阻尼的油气弹簧,主油腔,内油腔,气室,主活塞,从动活塞,阻尼孔等装置构成,具有结构简单,便于安装,承载吨位大,极大增大动行程等优点,其特点是在从动活塞上设置挡板,采用三个气室结构,并且下面两个反压气腔有一个通过阻尼孔将内油腔分开,能够形成三级压力油气弹簧。拥有多段工作模式,从而增大动行程,机动车能够在满载与空载等情况下平稳运行。(The invention discloses a three-air-chamber single-damping hydro-pneumatic spring, which comprises a main oil chamber, an inner oil chamber, air chambers, a main piston, a driven piston, a damping hole and the like, and has the advantages of simple structure, convenience in installation, large bearing tonnage, great increase of a moving stroke and the like. The multi-section working mode is provided, so that the moving stroke is increased, and the motor vehicle can run stably under the conditions of full load, no load and the like.)

1. A three-air-chamber single-damping hydro-pneumatic spring device comprises a main cylinder 1, a main oil chamber 2, a baffle 3, a baffle 4, a damping hole 5, an air chamber 6, a washing lifting ring 7, an internal piston 8, an internal oil chamber 9, a main air chamber 10, a main piston 11, a one-way valve 12 and an upper lifting ring 13.

2. Interior grease chamber and two interior gas chambers are separated through the piston respectively, and one of them intracavity is equipped with the damping hole, is equipped with the baffle in the oil pocket on the piston in the interior grease chamber, is equipped with two check valves on the main piston, this kind of three air chamber single damped hydro-pneumatic spring, its characterized in that: be equipped with a damping hole on the hydro-cylinder, this damping hole can make the fluid massive flow that flows into interior grease chamber left end oil pocket, is equipped with the baffle purpose in the oil pocket on the piston in the main grease chamber and guarantees that can not get into fluid in the main grease chamber, and the damping hole on the hydro-cylinder can help making fluid flow earlier left end air chamber, and hydro-pneumatic spring has multistage mode, hydro-pneumatic spring home range greatly increased, hydro-pneumatic spring dynamic stroke greatly increased.

Technical Field

The invention relates to a three-air-chamber single-damping hydro-pneumatic spring device, which belongs to the technical field of motor vehicle suspensions and is used as an elastic part and a hydraulic shock absorber of an automobile suspension.

Background

Hydro-pneumatic suspensions are commonly used in vehicles that travel in harsh environments, such as: the large-tonnage engineering vehicle is an ultra-large sand-stone vehicle used in a mining site. The vehicle adopts the hydro-pneumatic suspension to alleviate impact and reduce jolt, thereby reducing the loss of loading materials, improving the riding comfort of driving and increasing the vehicle speed, and having substantial help to the engineering efficiency.

The hydro-pneumatic spring that uses on the car at present has single-gas-chamber hydro-pneumatic spring and two kinds of double-chamber hydro-pneumatic spring, and wherein use more be single-gas-chamber hydro-pneumatic spring, though single-gas-chamber hydro-pneumatic spring has advantages such as small, weight is low, the installation of being convenient for, but the spring can extend a lot under the vehicle low-load or unloaded condition, and the elongation grow probably produces the deviational survey during the turn, probably causes the trouble even. The moving stroke of the traditional hydro-pneumatic spring is relatively small, and the damping effect is poor.

The double-air-chamber hydro-pneumatic spring can obviously reduce the axial length and obtain reasonable spring stiffness characteristic. However, it is bulky, heavy, inconvenient to install and arrange and is rarely used. In addition, two air chambers of the traditional double-air-chamber oil-gas spring have the same working pressure, and the oil-gas spring is not suitable for being applied to vehicles with particularly large load change, because when the load of the vehicle is increased, the pressure in the energy accumulator is increased, the volume is reduced, the volume needs to be increased by externally connecting the energy accumulator, if the initial inflation pressure in the two air chambers is the same, the rigidity of the oil-gas suspension is reduced due to the increase of the volume, and the offset frequency of the suspension at the moment can be greatly reduced. Therefore, for a multi-axle heavy vehicle, the double-air-chamber hydro-pneumatic suspension with the same pressure parameters is difficult to ensure the running smoothness of the vehicle under various load states.

The double air chamber may also face insufficient stability problems in certain specific cases.

Disclosure of Invention

Technical problem to be solved by the invention

The current hydro-pneumatic spring has the problems of small moving stroke and poor stability.

Objects of the invention

(1) The three-level pressure hydro-pneumatic spring has small volume and light weight and is convenient to install on a vehicle;

(2) the invention provides a three-air-chamber single-damping hydro-pneumatic spring device, which is reasonable in design, overcomes the defects of the prior art and has a good effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

(1) the main piston is provided with a baffle;

(2) a damping hole is arranged on the right air chamber;

(3) a three-air-chamber multi-damping structure is adopted;

(4) two one-way valves are arranged on the main piston.

The working principle is as follows:

the device comprises a main cylinder 1, a main oil chamber 2, a baffle 3, a baffle 4, a damping hole 5, an air chamber 6, a washing lifting ring 7, an internal piston 8, an internal oil chamber 9, a main air chamber 10, a main piston 11, a one-way valve 12 and an upper lifting ring 13. In order to increase the dynamic stroke better, form multistage mode, open the aperture on the oil cavity wall of slave piston lower extreme to guarantee that fluid can flow the lower extreme grease chamber, form the pressure differential through the damping hole, the circulation of check valve control fluid, for preventing to get into fluid in the main gas chamber, set up baffle structure. In order to ensure that the initial oil can flow from the right oil cavity to the left oil cavity, a damping hole is arranged on the right oil cavity. In order to increase the moving stroke, piston structures are arranged in the back pressure air chambers at the two ends, and the movement of the piston structures is not limited.

When the compression of hydro-pneumatic spring, thereby the fluid of main oil pocket gets into interior oil chamber through the check valve and compresses driven piston downwards, compress the gas of main air chamber, main air chamber begins work, move down to certain degree when driven piston, fluid passes through the aperture and flows down from both ends, because the effect of damping hole, fluid mainly flows left end air chamber, left end air chamber work, then increase along with the atmospheric pressure of left end air chamber, fluid begins mainly to flow to right-hand member air chamber, when both ends air chamber pressure is the same, two air chambers begin synchronous working. And forms a three-stage pressure structure with the main air chamber. This structure can make the natural vibration frequency of the automobile under the full load and no load conditions basically the same. The air chambers of the device have multiple working states, the main air chamber works independently at the beginning, then the left air chamber starts to work, then the right air chamber works independently, and finally the left air chamber and the right air chamber work simultaneously. The multi-section working mode can enable the dynamic stroke of the hydro-pneumatic spring to reach the maximum.