CN210290574U - Double-cylinder double-air-chamber hydro-pneumatic spring - Google Patents
Double-cylinder double-air-chamber hydro-pneumatic spring Download PDFInfo
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- CN210290574U CN210290574U CN201920859479.2U CN201920859479U CN210290574U CN 210290574 U CN210290574 U CN 210290574U CN 201920859479 U CN201920859479 U CN 201920859479U CN 210290574 U CN210290574 U CN 210290574U
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- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 6
- 241001330002 Bambuseae Species 0.000 claims abstract description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 6
- 239000011425 bamboo Substances 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000013016 damping Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 31
- 230000003139 buffering effect Effects 0.000 abstract description 17
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 11
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000872 buffer Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a double-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. 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.
Description
Technical Field
The utility model relates to a hydro-pneumatic spring technical field especially relates to a double-cylinder section of thick bamboo double-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 double-cylinder section of thick bamboo double-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 double-cylinder double-air-chamber hydro-pneumatic spring comprises 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 cylinder, an upper piston rod, an upper piston, a guide sleeve and a rear cover, the lower hydro-pneumatic spring comprises a lower cylinder, a lower piston rod, a lower piston and a rear end cover,
the upper piston rod and the upper piston are nested in the upper cylinder, the lower piston rod and the lower piston are nested in the lower cylinder, a cavity is formed in the upper piston rod, the outer diameter of the lower piston rod is smaller than the inner diameter of the cavity, the lower piston rod is nested in the cavity, and the lower piston rod moves in a reciprocating mode along the cavity;
the upper end of the upper cylinder barrel is provided with a guide sleeve, the guide sleeve is fixedly connected with the upper cylinder barrel through a bolt, the lower end of the upper cylinder barrel is provided with a rear cover, and the rear cover and the upper cylinder barrel are integrally formed;
the upper end of the lower cylinder barrel is fixedly connected with the rear cover through a bolt, and the lower end of the lower cylinder barrel is fixedly connected with the rear end cover through a bolt;
the bottom end of the upper piston is abutted with the top end of the rear end cover, and the lower piston is abutted with the lower end face of the rear end cover;
a cavity A is formed among the upper piston rod, the upper piston, the guide sleeve and the upper cylinder, a first oil cavity is formed among the lower piston rod, the upper piston and the upper cylinder, a cavity B is formed between the lower piston and the lower cylinder, 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 upper 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, sealing elements are arranged on the contact surfaces of the guide sleeve, the upper piston and the lower piston with the cylinder barrel.
Further, a sealing element is arranged on the contact surface of the rear cover and the lower piston rod.
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 present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is the cross-sectional view of the dual-cylinder dual-chamber hydro-pneumatic spring of the utility model in the extension state.
Fig. 2 is the cross-sectional view of the dual-cylinder dual-chamber hydro-pneumatic spring in the compression state.
In the figure, 1-an upper cylinder barrel 2-an upper piston rod 3-an upper piston 4-a guide sleeve 5-a rear cover 6-a lower cylinder barrel 7-a lower piston rod 8-a lower piston 9-a rear end cover 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 double-cylinder double-air-chamber hydro-pneumatic spring of the utility model comprises 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 as an upper and lower series mechanism, the upper hydro-pneumatic spring comprises an upper cylinder, an upper piston rod, an upper piston, a guide sleeve and a rear cover, the lower hydro-pneumatic spring comprises a lower cylinder, a lower piston rod, a lower piston and a rear end cover,
the upper piston rod and the upper piston are nested in the upper cylinder, the lower piston rod and the lower piston are nested in the lower cylinder, a cavity is formed in the upper piston rod, the outer diameter of the lower piston rod is smaller than the inner diameter of the cavity, the lower piston rod is nested in the cavity, and the lower piston rod moves in a reciprocating mode along the cavity;
the upper end of the upper cylinder barrel is provided with a guide sleeve, the guide sleeve is fixedly connected with the upper cylinder barrel through a bolt, the lower end of the upper cylinder barrel is provided with a rear cover, and the rear cover and the upper cylinder barrel are integrally formed;
the upper end of the lower cylinder barrel is fixedly connected with the rear cover through a bolt, and the lower end of the lower cylinder barrel is fixedly connected with the rear end cover through a bolt;
the bottom end of the upper piston is abutted with the top end of the rear end cover, and the lower piston is abutted with the lower end face of the rear end cover;
a cavity A is formed among the upper piston rod, the upper piston, the guide sleeve and the upper cylinder, a first oil cavity is formed among the lower piston rod, the upper piston and the upper cylinder, a cavity B is formed between the lower piston and the lower cylinder, and a second oil cavity is formed between the lower piston and the rear end cover; one side of the upper part of the upper cylinder barrel is provided with an A cavity interface, and one side of the rear end cover is provided with a B cavity interface;
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 lower piston and the cylinder barrel are all provided with sealing elements.
In this embodiment, a sealing member is disposed at a contact surface between the rear cover and the lower piston rod.
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 of an oil-gas suspension and a cylinder barrel of the suspension, and can also 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 double-cylinder double-chamber hydro-pneumatic spring adopts double piston rod, the built-in series connection hydro-pneumatic spring jar of four chambeies double stroke, comprises double-cylinder section of thick bamboo, and the inside of going up the piston rod is provided with the cavity, and lower piston rod nestification is in the cavity, along cavity reciprocating motion, has restricted the operation route of lower piston rod, though reduced the stroke of hydro-pneumatic spring jar, has nevertheless guaranteed the stability of hydro-pneumatic spring jar operation, is fit for the heavy load vehicle that has the limit to vehicle height.
The utility model discloses two air chamber hydro-pneumatic spring's of twin-cylinder section of thick bamboo concrete work 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.
The working principle of the middle-upper oil-gas spring and the lower-upper oil-gas spring of the utility model is the same as that of a common single-gas-chamber oil-gas spring, the cavity A is filled with low-pressure nitrogen, the cavity B is filled with high-pressure nitrogen, when the external load impacts, the upper piston rod compresses into the first oil cavity, the hydraulic oil enters the cavity A through the first check valve and the first damping hole, and the volume of the low-pressure nitrogen in the cavity A is reduced, the pressure is increased, the balance is rapidly achieved with the load, and the buffering effect is achieved; when external load reaches the high-pressure nitrogen pressure of the lower hydro-pneumatic spring cylinder, at the moment, the upper hydro-pneumatic spring cylinder and the lower hydro-pneumatic spring cylinder work together, the lower piston rod is compressed into the second oil cavity, hydraulic oil enters the cavity B through the second one-way valve and the second damping hole, the volume of the high-pressure nitrogen inside the cavity B is reduced, the pressure is increased, the high-pressure nitrogen is balanced with the load quickly, and a good buffering effect is achieved.
When the upper hydro-pneumatic spring is in a compressed state, the damping force ratio of the upper hydro-pneumatic spring is lower, the buffering function of the upper hydro-pneumatic spring is mainly completed by air compression change, and when the load of the upper hydro-pneumatic spring reaches the high-pressure nitrogen pressure of the lower hydro-pneumatic spring, the lower hydro-pneumatic spring is introduced, and the high-pressure nitrogen of the lower hydro-pneumatic spring realizes secondary buffering; when the upper oil-gas spring is in a recovery state, the check valve in the upper oil-gas spring cylinder is closed, and oil can only flow through the damping hole, so that the flow velocity of the oil is increased, the upper oil-gas spring cylinder generates large damping force, the recovery motion is restrained, and the vibration is quickly attenuated. The device aims to achieve good buffering and vibration damping effects by utilizing the variable stiffness and variable damping characteristics of two series-connected hydro-pneumatic spring cylinders.
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 (7)
1. The utility model provides a double-cylinder section of thick bamboo double-chamber hydro-pneumatic spring which characterized in that: comprises an upper hydro-pneumatic spring and a lower hydro-pneumatic spring, 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 cylinder barrel, an upper piston rod, an upper piston, a guide sleeve and a rear cover, the lower hydro-pneumatic spring comprises a lower cylinder barrel, a lower piston rod, a lower piston and a rear end cover,
the upper piston rod and the upper piston are nested in the upper cylinder, the lower piston rod and the lower piston are nested in the lower cylinder, a cavity is formed in the upper piston rod, the outer diameter of the lower piston rod is smaller than the inner diameter of the cavity, the lower piston rod is nested in the cavity, and the lower piston rod moves in a reciprocating mode along the cavity;
the upper end of the upper cylinder barrel is provided with a guide sleeve, the guide sleeve is fixedly connected with the upper cylinder barrel through a bolt, the lower end of the upper cylinder barrel is provided with a rear cover, and the rear cover and the upper cylinder barrel are integrally formed;
the upper end of the lower cylinder barrel is fixedly connected with the rear cover through a bolt, and the lower end of the lower cylinder barrel is fixedly connected with the rear end cover through a bolt;
the bottom end of the upper piston is abutted with the top end of the rear end cover, and the lower piston is abutted with the lower end face of the rear end cover;
a cavity A is formed among the upper piston rod, the upper piston, the guide sleeve and the upper cylinder, a first oil cavity is formed among the lower piston rod, the upper piston and the upper cylinder, a cavity B is formed between the lower piston and the lower cylinder, 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 upper 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 dual-cylinder dual-chamber hydro-pneumatic spring as claimed in 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 dual-cylinder dual-chamber hydro-pneumatic spring as claimed in 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 dual-cylinder dual-chamber hydro-pneumatic spring as claimed in 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 dual-cylinder dual-chamber hydro-pneumatic spring as claimed in claim 1, wherein: and sealing parts are arranged on the contact surfaces of the guide sleeve, the upper piston, the lower piston and the cylinder barrel.
6. The dual-cylinder dual-chamber hydro-pneumatic spring as claimed in claim 1, wherein: and a sealing element is arranged on the contact surface of the rear cover and the lower piston rod.
7. The dual-cylinder dual-chamber hydro-pneumatic spring as claimed in claim 5 or 6, 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 |
|---|---|---|---|
| CN201920859479.2U CN210290574U (en) | 2019-06-06 | 2019-06-06 | Double-cylinder double-air-chamber hydro-pneumatic spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920859479.2U CN210290574U (en) | 2019-06-06 | 2019-06-06 | Double-cylinder double-air-chamber hydro-pneumatic spring |
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| Publication Number | Publication Date |
|---|---|
| CN210290574U true CN210290574U (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920859479.2U Expired - Fee Related CN210290574U (en) | 2019-06-06 | 2019-06-06 | Double-cylinder double-air-chamber hydro-pneumatic spring |
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| CN (1) | CN210290574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109930A (en) * | 2021-11-30 | 2022-03-01 | 台州九桔科技股份有限公司 | Anti-side rolling device |
-
2019
- 2019-06-06 CN CN201920859479.2U patent/CN210290574U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109930A (en) * | 2021-11-30 | 2022-03-01 | 台州九桔科技股份有限公司 | Anti-side rolling device |
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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 |