CN210290575U - Single-cylinder double-air-chamber hydro-pneumatic spring - Google Patents
Single-cylinder double-air-chamber hydro-pneumatic spring Download PDFInfo
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- CN210290575U CN210290575U CN201920860037.XU CN201920860037U CN210290575U CN 210290575 U CN210290575 U CN 210290575U CN 201920860037 U CN201920860037 U CN 201920860037U CN 210290575 U CN210290575 U CN 210290575U
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Abstract
The utility model discloses a single cylinder section of thick bamboo double air chamber hydro-pneumatic spring adopts double piston rod, the built-in series connection hydro-pneumatic spring jar of four chambeies double stroke, including the hydro-pneumatic spring jar of two independent strokes, series connection mechanism about two hydro-pneumatic spring jars, a cylinder of sharing. During low load, the upper hydro-pneumatic spring cylinder filled with low-pressure nitrogen gas is compressed and buffered downwards, the hydro-pneumatic spring cylinder filled with high-pressure nitrogen gas does not work at the moment, and the pressure of the lower hydro-pneumatic spring cylinder filled with high-pressure nitrogen gas is higher than that of the upper hydro-pneumatic spring cylinder. When the load reaches a certain value, the upper hydro-pneumatic spring cylinder filled with low pressure continues to move downwards in a buffering mode, and when the high-pressure nitrogen pressure of the lower hydro-pneumatic spring cylinder is reached, the upper hydro-pneumatic spring cylinder and the lower hydro-pneumatic spring cylinder work together to achieve a good buffering effect. The utility model discloses a single cylinder realizes two hydro-pneumatic spring's series connection, has simplified hydro-pneumatic spring's structure, and the cost is reduced can extend hydro-pneumatic spring cylinder's stroke simultaneously for when heavy-duty vehicle rigidity is too big, still can realize good buffering effect.
Description
Technical Field
The utility model relates to a hydro-pneumatic spring technical field especially relates to a single cylinder section of thick bamboo double air chamber hydro-pneumatic spring.
Background
When an automobile runs on an uneven road surface, the automobile is subjected to impact from the road surface to generate vibration, and an elastic element and a damper are mounted in parallel in a suspension system in order to alleviate the impact and attenuate the vibration. In which the elastic element is used to absorb impact energy to filter the vibration of the road surface, but the spring itself also has a reciprocating motion, and the damper is used to damp the spring jump.
At present, a spiral spring is generally adopted in an automobile suspension system as an elastic element, and a hydro-pneumatic spring is adopted in high-grade vehicles and heavy engineering vehicles. Hydro-pneumatic springs, because of their good non-linear stiffness characteristics, can improve vehicle comfort and stability to some extent over coil springs.
Although the existing hydro-pneumatic spring has the advantage that the rigidity changes along with the load, certain defects also exist at the same time: the hydro-pneumatic spring cylinder generally adjusts the rigidity through inflation pressure, and the damping or rigidity is changed through the structure of a piston or a cylinder barrel, but the change range of the effective rigidity is small, or the buffering is too short when the rigidity is large, and the stroke of the lengthened hydro-pneumatic spring cylinder is limited by space. If the hydro-pneumatic spring cylinder for the heavy-duty vehicle needs to have a good buffer stroke when the hydro-pneumatic spring cylinder is in no load and full load, if the hydro-pneumatic spring cylinder is in no load, the buffer effect is achieved, and if the hydro-pneumatic spring cylinder is in full load, the buffer effect is poor; the initial rigidity is changed through the inflation pressure, the buffering effect is good when the vehicle is fully loaded, the rigidity is too large when the vehicle is unloaded, the buffering effect is poor, and the increase stroke is limited by the height of the vehicle.
Therefore, for the traditional hydro-pneumatic spring, how to realize good elastic characteristics in no load, the traditional hydro-pneumatic spring can become a rigid suspension in heavy load, more impact energy is absorbed, and the vibration of a vehicle frame is restrained, which is a problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a single cylinder section of thick bamboo double air chamber hydro-pneumatic spring solves current hydro-pneumatic spring and does not have a load at heavy load vehicle, the relatively poor problem of heavy load overall process buffering effect.
The utility model adopts the technical proposal that:
a single cylinder double-air chamber hydro-pneumatic spring comprises a cylinder barrel, an upper hydro-pneumatic spring and a lower hydro-pneumatic spring, wherein the upper hydro-pneumatic spring and the lower hydro-pneumatic spring are arranged in an up-down series mechanism, the upper hydro-pneumatic spring comprises an upper piston rod, an upper piston, a floating piston and a guide sleeve, the lower hydro-pneumatic spring comprises a lower piston rod, a lower piston and a rear end cover,
the upper piston rod, the upper piston and the floating piston are nested in the cylinder barrel, the lower piston rod and the lower piston are nested in the cylinder barrel, the outer diameters of the upper piston rod and the lower piston rod are consistent, and the outer diameters of the upper piston, the floating piston and the lower piston are consistent;
the upper end of the cylinder barrel is provided with a guide sleeve, the guide sleeve is fixedly connected with the cylinder barrel through a bolt, the lower end of the cylinder barrel is provided with a rear end cover, and the rear end cover is fixedly connected with the cylinder barrel through a bolt;
the bottom end of the floating piston is contacted with the top end of the lower piston rod, the inner wall of the cylinder barrel is provided with a blocking point, the floating piston is abutted with the upper end face of the blocking point, and the lower piston is abutted with the lower end face of the blocking point;
a cavity A is formed between the guide sleeve and the upper piston, a first oil cavity is formed between the upper piston and the floating piston, a cavity B is formed between the floating piston and the lower piston, and a second oil cavity is formed between the lower piston and the rear end cover; a cavity A connector is arranged on one side of the upper part of the cylinder barrel, and a cavity B connector is arranged on one side of the rear end cover;
the cavity A is communicated with the first oil cavity through at least one-way valve and at least one damping hole respectively;
and the cavity B is communicated with the second oil cavity through at least one check valve and at least one damping hole respectively.
Further, the upper piston rod and the upper piston are integrally formed, and the lower piston rod and the lower piston are integrally formed.
Furthermore, a first one-way valve is arranged on the upper piston rod, and a second one-way valve is arranged on the lower piston rod.
Furthermore, a first damping hole is formed in the upper piston, and a second damping hole is formed in the lower piston.
Furthermore, the guide sleeve, the upper piston, the floating piston and the contact surface of the lower piston and the cylinder barrel are all provided with sealing pieces.
Preferably, the sealing element is a slip ring type combined sealing structure formed by a Stent seal and an elastic O-shaped ring.
The utility model has the advantages that:
the utility model discloses a built-in series connection hydro-pneumatic spring jar of double piston rod, four chambeies double stroke, including the hydro-pneumatic spring jar of two independent strokes, series connection mechanism about two hydro-pneumatic spring jars. The upper and lower piston rods of the hydro-pneumatic spring cylinder are all provided with built-in one-way valves, and the piston is provided with a damping hole.
During low load, the upper hydro-pneumatic spring cylinder filled with low-pressure nitrogen gas is compressed and buffered downwards, the hydro-pneumatic spring cylinder filled with high-pressure nitrogen gas does not work at the moment, and the pressure of the lower hydro-pneumatic spring cylinder filled with high-pressure nitrogen gas is higher than that of the upper hydro-pneumatic spring cylinder. When the load reaches a certain value, the upper hydro-pneumatic spring cylinder filled with low pressure continues to move downwards in a buffering mode, and when the high-pressure nitrogen pressure of the lower hydro-pneumatic spring cylinder is reached, the upper hydro-pneumatic spring cylinder and the lower hydro-pneumatic spring cylinder work together to achieve a good buffering effect.
The utility model discloses a heavy-duty car all has good buffering effect at no-load, heavy load overall process.
The utility model discloses single cylinder double air chamber hydro-pneumatic spring adopts single cylinder, realizes two hydro-pneumatic spring's series connection, has simplified hydro-pneumatic spring's structure, and the cost is reduced can extend the stroke of hydro-pneumatic spring jar simultaneously for when heavy load vehicle rigidity is too big, still can realize good buffering effect.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is the cross-sectional view of the single-cylinder double-air-chamber hydro-pneumatic spring of the utility model in the extension state.
Fig. 2 is the cross-sectional view of the single-cylinder double-air-chamber hydro-pneumatic spring in the compression state.
In the figure, 1-a cylinder barrel 2-an upper piston rod 3-an upper piston 4-a floating piston 5-a guide sleeve 6-a lower piston rod 7-a lower piston 8-a rear end cover 9-a blocking tip 10-an A cavity 11-a cavity 12-a first oil cavity 13-a second oil cavity 14-an A cavity interface 15-a cavity interface 16-a first check valve 17-a second check valve 18-a first damping hole 19-a second damping hole.
Detailed Description
In order to enhance the understanding of the present invention, the following detailed description of the present invention is made with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in figures 1 and 2, the utility model relates to a single cylinder double-air chamber hydro-pneumatic spring, which comprises a cylinder barrel, an upper hydro-pneumatic spring and a lower hydro-pneumatic spring, wherein the upper hydro-pneumatic spring and the lower hydro-pneumatic spring are arranged in an up-down series mechanism, the upper hydro-pneumatic spring comprises an upper piston rod, an upper piston, a floating piston and a guide sleeve, the lower hydro-pneumatic spring comprises a lower piston rod, a lower piston and a rear end cover,
the upper piston rod, the upper piston and the floating piston are nested in the cylinder barrel, the lower piston rod and the lower piston are nested in the cylinder barrel, the outer diameters of the upper piston rod and the lower piston rod are consistent, and the outer diameters of the upper piston, the floating piston and the lower piston are consistent;
the upper end of the cylinder barrel is provided with a guide sleeve, the guide sleeve is fixedly connected with the cylinder barrel through a bolt, the lower end of the cylinder barrel is provided with a rear end cover, and the rear end cover is fixedly connected with the cylinder barrel through a bolt;
the bottom end of the floating piston is contacted with the top end of the lower piston rod, the inner wall of the cylinder barrel is provided with a blocking point, the floating piston is abutted with the upper end face of the blocking point, and the lower piston is abutted with the lower end face of the blocking point;
a cavity A is formed between the guide sleeve and the upper piston, a first oil cavity is formed between the upper piston and the floating piston, a cavity B is formed between the floating piston and the lower piston, and a second oil cavity is formed between the lower piston and the rear end cover; a cavity A connector is arranged on one side of the upper part of the cylinder barrel, and a cavity B connector is arranged on one side of the rear end cover;
the cavity A is communicated with the first oil cavity through at least one-way valve and at least one damping hole respectively;
and the cavity B is communicated with the second oil cavity through at least one check valve and at least one damping hole respectively.
In this embodiment, the upper piston rod and the upper piston are integrally formed, and the lower piston rod and the lower piston are integrally formed.
In this embodiment, the upper piston rod is provided with a first check valve, and the lower piston rod is provided with a second check valve.
In this embodiment, the upper piston is provided with a first damping hole, and the lower piston is provided with a second damping hole.
In this embodiment, the contact surfaces of the guide sleeve, the upper piston, the floating piston and the lower piston with the cylinder barrel are all provided with sealing parts.
In this embodiment, the sealing element is a slip ring type combined sealing structure formed by a steve seal and an elastic O-shaped ring, and the slip ring type combined sealing structure formed by the steve seal and the elastic O-shaped ring is used for sealing a piston rod and a suspension cylinder barrel of an oil-gas suspension and also can be used for sealing a piston and the cylinder barrel. The geometric shape of the sealing ring is stepped, zero leakage can be achieved, and 2O-shaped rubber rings with precompression are arranged below the sealing ring and used as elastic bodies to compensate abrasion of the sealing ring. The seal has good self-lubricity, anti-creep and corrosion resistance, and a low coefficient of friction.
The utility model discloses single cylinder double air chamber hydro-pneumatic spring adopts single cylinder, realizes two hydro-pneumatic spring's series connection, has simplified hydro-pneumatic spring's structure, and the cost is reduced can extend the stroke of hydro-pneumatic spring jar simultaneously for when heavy load vehicle rigidity is too big, still can realize good buffering effect.
The utility model discloses single cylinder double air chamber hydro-pneumatic spring's concrete working process is:
during low load, the upper hydro-pneumatic spring cylinder filled with low-pressure nitrogen gas is compressed and buffered downwards, the hydro-pneumatic spring cylinder filled with high-pressure nitrogen gas does not work at the moment, and the pressure of the lower hydro-pneumatic spring cylinder filled with high-pressure nitrogen gas is higher than that of the upper hydro-pneumatic spring cylinder. When the load reaches a certain value, the upper hydro-pneumatic spring cylinder filled with low pressure continues to move downwards in a buffering mode, and when the high-pressure nitrogen pressure of the lower hydro-pneumatic spring cylinder is reached, the upper hydro-pneumatic spring cylinder and the lower hydro-pneumatic spring cylinder work together to achieve a good buffering effect.
It should be noted that the above-mentioned embodiments are illustrative and not restrictive of the technical solutions of the present invention, and equivalents of those skilled in the art or other modifications made according to the prior art are intended to be included within the scope of the claims of the present invention as long as they do not exceed the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The utility model provides a single cylinder section of thick bamboo double air chamber hydro-pneumatic spring which characterized in that: comprises a cylinder barrel, an upper hydro-pneumatic spring and a lower hydro-pneumatic spring, wherein the upper hydro-pneumatic spring and the lower hydro-pneumatic spring are arranged in an up-down serial mechanism, the upper hydro-pneumatic spring comprises an upper piston rod, an upper piston, a floating piston and a guide sleeve, the lower hydro-pneumatic spring comprises a lower piston rod, a lower piston and a rear end cover,
the upper piston rod, the upper piston and the floating piston are nested in the cylinder barrel, the lower piston rod and the lower piston are nested in the cylinder barrel, the outer diameters of the upper piston rod and the lower piston rod are consistent, and the outer diameters of the upper piston, the floating piston and the lower piston are consistent;
the upper end of the cylinder barrel is provided with a guide sleeve, the guide sleeve is fixedly connected with the cylinder barrel through a bolt, the lower end of the cylinder barrel is provided with a rear end cover, and the rear end cover is fixedly connected with the cylinder barrel through a bolt;
the bottom end of the floating piston is contacted with the top end of the lower piston rod, the inner wall of the cylinder barrel is provided with a blocking point, the floating piston is abutted with the upper end face of the blocking point, and the lower piston is abutted with the lower end face of the blocking point;
a cavity A is formed between the guide sleeve and the upper piston, a first oil cavity is formed between the upper piston and the floating piston, a cavity B is formed between the floating piston and the lower piston, and a second oil cavity is formed between the lower piston and the rear end cover; a cavity A connector is arranged on one side of the upper part of the cylinder barrel, and a cavity B connector is arranged on one side of the rear end cover;
the cavity A is communicated with the first oil cavity through at least one-way valve and at least one damping hole respectively;
and the cavity B is communicated with the second oil cavity through at least one check valve and at least one damping hole respectively.
2. The single cylinder dual chamber hydro-pneumatic spring of claim 1, wherein: the upper piston rod and the upper piston are integrally formed, and the lower piston rod and the lower piston are integrally formed.
3. The single cylinder dual chamber hydro-pneumatic spring of claim 1, wherein: the upper piston rod is provided with a first one-way valve, and the lower piston rod is provided with a second one-way valve.
4. The single cylinder dual chamber hydro-pneumatic spring of claim 1, wherein: the upper piston is provided with a first damping hole, and the lower piston is provided with a second damping hole.
5. The single cylinder dual chamber hydro-pneumatic spring of claim 1, wherein: and sealing parts are arranged on the contact surfaces of the guide sleeve, the upper piston, the floating piston and the lower piston with the cylinder barrel.
6. The single cylinder dual chamber hydro-pneumatic spring of claim 5, wherein: the sealing element is a slip ring type combined sealing structure formed by a Stent seal and an elastic O-shaped ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920860037.XU CN210290575U (en) | 2019-06-06 | 2019-06-06 | Single-cylinder double-air-chamber hydro-pneumatic spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920860037.XU CN210290575U (en) | 2019-06-06 | 2019-06-06 | Single-cylinder double-air-chamber hydro-pneumatic spring |
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| Publication Number | Publication Date |
|---|---|
| CN210290575U true CN210290575U (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920860037.XU Expired - Fee Related CN210290575U (en) | 2019-06-06 | 2019-06-06 | Single-cylinder double-air-chamber hydro-pneumatic spring |
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| Country | Link |
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| CN (1) | CN210290575U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442049A (en) * | 2020-05-11 | 2020-07-24 | 华侨大学 | Integrated double-air-chamber oil-gas damper and working method |
| CN113685451A (en) * | 2021-09-02 | 2021-11-23 | 江苏兴锻智能装备科技有限公司 | Pressure stabilizing mechanism of wet clutch of press machine |
-
2019
- 2019-06-06 CN CN201920860037.XU patent/CN210290575U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442049A (en) * | 2020-05-11 | 2020-07-24 | 华侨大学 | Integrated double-air-chamber oil-gas damper and working method |
| CN113685451A (en) * | 2021-09-02 | 2021-11-23 | 江苏兴锻智能装备科技有限公司 | Pressure stabilizing mechanism of wet clutch of press machine |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200410 Termination date: 20210606 |