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Two-stage pressure-type hydro-pneumatic spring and working method thereof

A kind of oil and gas spring, pressure type technology, applied in the direction of spring, spring/shock absorber, shock absorber, etc., can solve the problem that the performance of oil and gas spring cannot be guaranteed, and the sealing performance of floating piston is very high, so as to reduce the sealing requirements and prolong the use. effect of life

Inactive Publication Date: 2016-09-28
JIANGSU UNIV
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  • Application Information

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Problems solved by technology

Chinese patent application number 201410700789.1 discloses a two-stage pressure oil-pneumatic spring and its working method. The two-stage air chambers are directly connected in series through the floating piston. This arrangement requires high sealing performance of the floating piston. , the performance of the oil-gas spring cannot be guaranteed

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  • Two-stage pressure-type hydro-pneumatic spring and working method thereof
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  • Two-stage pressure-type hydro-pneumatic spring and working method thereof

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Embodiment Construction

[0026] see figure 1, the two-stage pressure oil-gas spring of the present invention has an outer cylinder 2, the top of the outer cylinder 2 is sealed and connected to the cylinder head 1, and there is a sealing gasket between the top of the outer cylinder 2 and the cylinder head 1 and is fixedly connected by a bolt assembly

[0027] An inner cylinder 5 is coaxially nested inside the outer cylinder 2, and the piston rod 11 extends upwards into the inner cylinder 5 from the bottom of the outer cylinder 2 and the inner cylinder 5, and the outer cylinder 2, the inner cylinder 5, The three of piston rod 11 are coaxial.

[0028] The bottom of the outer cylinder 2 and the bottom of the inner cylinder 5 are connected by welding to form a sealed whole, which needs to be guaranteed to have good sealing performance.

[0029] The top of the inner cylinder 5 is open and is not connected with the cylinder head 1. The opening position of the top of the inner cylinder 5 is lower than the to...

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Abstract

The invention discloses a two-stage pressure-type hydro-pneumatic spring in a vehicular suspension system and a working method thereof. An inner cylinder barrel is coaxially nested in an outer cylinder barrel, a cylindrical piston rod coaxially extends upward from the bottom of the inner cylinder barrel into the inner cylinder barrel, a first floating piston ring is hermetically and slidably connected between the inner wall of the outer cylinder barrel and the outer wall of the inner cylinder barrel, an outer cavity of a rodless chamber filled with an oil liquid is formed in space above the first floating piston ring, and a second stage gas chamber filled with high pressure gas is formed in space below the first floating piston ring; a damper valve assembly is coaxially connected to the top of a central hole of the piston rod, a second floating piston which is hermetically and slidably connected to the inner wall of the piston rod is arranged below the bottom of the damper valve assembly, and a first stage gas chamber is formed in space between the second floating piston and the bottom of the piston rod. The two gas chambers are separately arranged, and a rigid valve body moves to open and close the damper valve assembly, so that the service life of the hydro-pneumatic spring is effectively prolonged.

Description

technical field [0001] The invention relates to the field of vehicle suspension systems, in particular to an oil-pneumatic spring with variable damping installed in the suspension system. Background technique [0002] The core of the vehicle's oil-pneumatic suspension is the oil-pneumatic spring. The oil-pneumatic spring is generally composed of a gas spring and a hydraulic cylinder equivalent to a hydraulic shock absorber. It uses gas (generally inert gas nitrogen) as the elastic medium and oil as the force transmission medium. . The oil-pneumatic spring not only has a good cushioning capacity, but also has a good damping effect, and can also adjust the height of the frame, which is suitable for heavy vehicles and large off-road vehicles. The oil-pneumatic spring integrates elastic elements and damping elements, and its hydraulic cylinder body has a certain guiding effect, which can effectively reduce the weight of the spring itself and the volume occupied by the layout. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F9/34F16F9/32
CPCF16F9/3207F16F9/3214F16F9/3221F16F9/34
Inventor 李仲兴郭子权田舟刘阳江洪
Owner JIANGSU UNIV
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