CN109611493B - Hydro-pneumatic spring damping adjusting device - Google Patents
Hydro-pneumatic spring damping adjusting device Download PDFInfo
- Publication number
- CN109611493B CN109611493B CN201811605623.6A CN201811605623A CN109611493B CN 109611493 B CN109611493 B CN 109611493B CN 201811605623 A CN201811605623 A CN 201811605623A CN 109611493 B CN109611493 B CN 109611493B
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- Prior art keywords
- piston
- cavity
- hydro
- oil
- pneumatic spring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/063—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid comprising a hollow piston rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/056—Regulating distributors or valves for hydropneumatic systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
- F16F9/067—Partitions of the piston type, e.g. sliding pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
- F16F9/464—Control of valve bias or pre-stress, e.g. electromagnetically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0005—Attachment, e.g. to facilitate mounting onto confer adjustability
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/18—Control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention aims to provide a hydro-pneumatic spring damping adjusting device which comprises a working cylinder and a pilot type proportional pressure relief valve, wherein a piston is arranged in the working cylinder and divides the working cylinder into a rod cavity and a rodless cavity. The invention aims to solve the defect that the vehicle using the hydro-pneumatic spring is poor in driving comfort caused by the fact that the hydro-pneumatic spring can only adjust the height and can not adjust the damping. The damping adjusting device for the hydro-pneumatic spring is provided for realizing the function of adjusting the restoration damping of the hydro-pneumatic spring. Thereby improving the smoothness of the vehicle and improving the comfort and the wild property of the vehicle.
Description
Technical Field
The invention relates to the technical field of automobile chassis suspensions, in particular to a hydro-pneumatic spring damping adjusting device for an automobile chassis shock absorber.
Background
In an automobile suspension system, a hydro-pneumatic spring used by the existing vehicle is used as a force transmission medium through hydraulic oil filled in a cylinder, high-pressure gas filled in the cylinder is used as a stress and working medium, wherein the hydraulic oil plays a supporting role, and the high-pressure gas plays a spring role, so the hydro-pneumatic spring can realize the supporting and damping functions of a chassis suspension of the vehicle, and the adjustment function of the ground clearance of the automobile chassis can be realized through the oil filling and discharging of the hydro-pneumatic spring. The traditional hydro-pneumatic spring mainly realizes the shock attenuation through the inside damping valve of hydro-pneumatic spring, and the damping coefficient of hydro-pneumatic spring is not adjustable, so the vehicle that uses hydro-pneumatic spring is to the adaptability of different road surfaces not enough, and the travelling comfort through jolting the road surface is relatively poor.
So far, the technology of the adjustable damping shock absorber has tended to be mature, and representative researches are mainly magneto-rheological fluid technology and CDC technology. However, the technology for adjusting the damping of the hydro-pneumatic spring is not researched much, wherein the patent with the publication number of CN201050569Y discloses an adjustable damping hydro-pneumatic shock absorber, and the patent provides a damping adjustment method for the hydro-pneumatic spring shock absorber, but the hydro-pneumatic spring needs to manually adjust the damping of the hydro-pneumatic spring, and has complex structure and low practicability.
Disclosure of Invention
The invention provides a hydro-pneumatic spring damping adjustment device for solving the defects in the prior art, and the hydro-pneumatic spring damping adjustment device has the characteristics of simple structure and large damping coefficient adjustment range. The vehicle with the hydro-pneumatic spring system overcomes the defect that a vehicle with the hydro-pneumatic spring system can only adjust the height and cannot adjust the damping coefficient.
In order to achieve the above purpose, the invention adopts the following technical scheme: the damping regulator for hydro-pneumatic spring includes hydro-pneumatic spring with one air chamber inside the piston rod and pilot type proportional pressure relief valve.
The hydro-pneumatic spring damping adjusting device comprises a working cylinder and a pilot type proportional pressure overflow valve, wherein a piston is arranged in the working cylinder and divides the working cylinder into a rod cavity and a rodless cavity; a piston rod is arranged on the piston, a floating piston is arranged in the piston rod, the right end of the floating piston is an air chamber, the left end of the floating piston is a piston rod oil cavity, and the piston rod oil cavity is communicated with a rod cavity; the inside of the air chamber is filled with high-pressure air, and hydraulic oil is filled in the rod cavity, the rodless cavity and the piston rod oil cavity; the rod cavity is communicated with the rodless cavity through an external oil way and a pilot type proportional pressure overflow valve arranged on the oil way; the piston is provided with a piston one-way valve which is communicated with the rod cavity and the rodless cavity; when the hydro-pneumatic spring performs compression movement, the piston rod is stressed downwards, the piston one-way valve is opened, hydraulic oil in the rodless cavity enters the rod cavity and the piston rod oil cavity through the piston one-way valve, the pressure in the rod cavity is increased, and the floating piston is lifted; when the hydro-pneumatic spring carries out restoring movement, the piston rod is stressed to rise, the piston one-way valve is closed, hydraulic oil in the rod cavity enters the rodless cavity through the external oil way and the pilot type proportional pressure overflow valve, the pressure in the rod cavity is reduced, the floating piston descends, and the hydraulic oil in the piston rod oil cavity enters the rod cavity. The hydro-pneumatic spring adjusting device is connected through the one-way valve and the pilot type proportional pressure relief valve to form a closed working oil way.
The hydro-pneumatic spring damping adjusting device is characterized in that an oil way is newly added outside a cylinder body on the basis of the original structure of the hydro-pneumatic spring to serve as a restoring oil way of the hydro-pneumatic spring, and a pilot type proportional pressure relief valve is arranged on the restoring oil way of the hydro-pneumatic spring to serve as restoring damping of the hydro-pneumatic spring. When the piston rod is stressed and rises, hydraulic oil in the rod cavity and the piston rod oil cavity enters the rodless cavity through the pilot type proportional pressure relief valve, the opening pressure of the pilot type proportional pressure relief valve is controlled by using current, the opening pressure of the relief valve is different, and the restoration damping of the hydro-pneumatic spring is different. The variable damping function of the hydro-pneumatic spring is realized, so that the vehicle is suitable for various road conditions, the smoothness of the vehicle is improved, and the comfort and the wild property of the vehicle are improved.
Effects of the invention
The invention aims to solve the defect that the vehicle using the hydro-pneumatic spring is poor in driving comfort caused by the fact that the hydro-pneumatic spring can only adjust the height and can not adjust the damping. The damping adjusting device for the hydro-pneumatic spring is provided for realizing the function of adjusting the restoration damping of the hydro-pneumatic spring. Thereby improving the smoothness of the vehicle and improving the comfort and the wild property of the vehicle.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
Fig. 2 is a cross-sectional view of the structure of the present invention.
Detailed Description
Referring to fig. 1, the hydro-pneumatic spring damping adjustment device in fig. 1 comprises a working cylinder 1 and a pilot type proportional pressure relief valve 2, wherein a piston 3 is arranged in the working cylinder, and the piston 3 divides the working cylinder 1 into a rod cavity 4 and a rodless cavity 5; the piston 3 is provided with a piston rod 6, a floating piston 7 is arranged in the piston rod 6, the right end of the floating piston 7 is provided with an air chamber 8, the left end of the floating piston is provided with a piston rod oil cavity 9, and the piston rod oil cavity 9 is communicated with the rod cavity 4; the air chamber 8 is filled with high-pressure air, and hydraulic oil is filled in the rod cavity 4, the rodless cavity 5 and the piston rod oil cavity 9; the rod cavity 4 is communicated with the rodless cavity 5 through an external oil way 10 and a pilot type proportional pressure relief valve 2 arranged on the oil way; the piston 3 is provided with a piston one-way valve 11 which is communicated with the rod cavity 4 and the rodless cavity 5; when the hydro-pneumatic spring performs compression movement, the piston rod 6 is stressed to descend, the piston one-way valve 11 is opened, hydraulic oil in the rodless cavity 5 enters the rod cavity 4 and the piston rod oil cavity 9 through the piston one-way valve 11, the pressure in the rod cavity 4 is increased, and the floating piston 7 ascends; when the hydro-pneumatic spring carries out restoring movement, the piston rod 6 is stressed to rise, the piston one-way valve 11 is closed, hydraulic oil in the rod cavity 4 enters the rodless cavity 5 through the external oil way 10 and the pilot type proportional pressure relief valve 2, the pressure in the rod cavity 4 is reduced, the floating piston 7 descends, and the hydraulic oil in the piston rod oil cavity 9 enters the rod cavity 4.
Referring to fig. 2, the piston rod 12 of the hydro-pneumatic spring is filled with nitrogen 13, and the floating piston 14 is filled with hydraulic oil. The impact of the uneven road surface is received in the running process of the vehicle, the impact force is transmitted to the floating piston 14 through the piston rod 12 and hydraulic oil, so that the compressed nitrogen 13 is compressed, the impact force caused by the uneven road surface is absorbed, and in the process, the damping valve 23 on the piston 16 generates damping, namely the damping function of the hydro-pneumatic spring is realized; the piston rod 12 is pushed to extend or retract by filling and discharging oil through the oil port 15, so that the height adjustment of the hydro-pneumatic spring is realized, and the ground clearance of the chassis of the vehicle is changed.
Referring to fig. 2, the return stroke oil path of the hydro-pneumatic spring is arranged outside the hydro-pneumatic spring, and is connected with a hole a and a hole b on the cylinder 18 and a hole c on the piston rod 12 through an oil pipe 17, and is communicated with oil between a rod cavity 19 and a rodless cavity 20 on two sides of the piston 16 and a piston rod oil cavity 24. And a pilot type proportional pressure relief valve 21 is interposed between the holes a and b and mounted on a mount 22 in the return oil passage. When the hydro-pneumatic spring is in restoring motion, the piston rod 12 is stressed to rise, the floating piston 14 moves towards the piston 16, oil in the piston rod oil cavity 24 is extruded to reach the rod cavity 19 through the hole c, the piston rod 12 is stretched outwards, and the oil in the rod cavity 19 sequentially passes through the hole a, the oil pipe 17, the overflow valve 21 and the hole b to reach the rodless cavity 20. The relief valve 21 is used as a damping valve on the restoring oil path, and the opening pressure of the relief valve 21 can be controlled by the magnitude of the external current, and changing the magnitude of the current changes the opening pressure of the relief valve 21, i.e. changes the damping of the oil path restored by the hydro-pneumatic spring.
The innovation of the invention is that: the invention provides a hydro-pneumatic spring damping adjusting device, which is characterized in that an oil way is newly added outside a cylinder body on the basis of the original structure of a hydro-pneumatic spring to be used as a restoring oil way of the hydro-pneumatic spring, and a pilot type proportional pressure relief valve is arranged on the restoring oil way of the hydro-pneumatic spring to be used as restoring damping of the hydro-pneumatic spring. The opening pressure of the spill valve is controlled using an electric current. The opening pressure of the overflow valve is different due to different current, namely, the restoration damping of the hydro-pneumatic spring is different. The hydro-pneumatic spring realizes the variable damping function of the hydro-pneumatic spring on the basis of having the damping function and the height adjusting function, so that the vehicle is suitable for various road conditions, and the comfort and the wild performance of the vehicle are improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (2)
1. The utility model provides a hydro-pneumatic spring damping adjustment device, includes working cylinder and guide formula proportion pressure relief valve, is equipped with piston, its characterized in that in the working cylinder: the piston divides the working cylinder into a rod cavity and a rodless cavity; a piston rod is arranged on the piston, a floating piston is arranged in the piston rod, the right end of the floating piston is an air chamber, the left end of the floating piston is a piston rod oil cavity, and the piston rod oil cavity is communicated with a rod cavity; the inside of the air chamber is filled with high-pressure air, and hydraulic oil is filled in the rod cavity, the rodless cavity and the piston rod oil cavity; the rod cavity is communicated with the rodless cavity through an external oil way and a pilot type proportional pressure overflow valve arranged on the oil way; the piston is provided with a piston one-way valve which is communicated with the rod cavity and the rodless cavity; when the hydro-pneumatic spring performs compression movement, the piston rod is stressed downwards, the piston one-way valve is opened, hydraulic oil in the rodless cavity enters the rod cavity and the piston rod oil cavity through the piston one-way valve, the pressure in the rod cavity is increased, and the floating piston is lifted; when the hydro-pneumatic spring performs restoring movement, the piston rod is stressed to rise, the piston one-way valve is closed, hydraulic oil in the rod cavity enters the rodless cavity through the external oil way and the pilot type proportional pressure overflow valve, the pressure in the rod cavity is reduced, the floating piston descends, hydraulic oil in the piston rod oil cavity enters the rod cavity, and the hydro-pneumatic spring adjusting device is connected through the one-way valve and the pilot type proportional pressure overflow valve to form a closed working oil way;
The damping valve on the piston of the hydro-pneumatic spring generates damping, so that the damping function of the hydro-pneumatic spring is realized, the rodless cavity of the hydro-pneumatic spring is filled with oil through the oil port to push the piston rod to extend or retract, namely, the height adjustment of the hydro-pneumatic spring is realized, and the ground clearance of the chassis of the vehicle is changed;
The external oil way is formed by connecting a hole on the cylinder barrel and a hole on the piston rod through an oil pipe, communicating oil between a rod cavity and a rodless cavity on two sides of the piston and an oil cavity of the piston rod, and the pilot type proportional pressure overflow valve is arranged between the holes on the cylinder barrel and is arranged on a mounting seat in the restoration oil way.
2. The hydro-pneumatic spring damping adjustment device of claim 1, wherein: the opening pressure of the pilot type proportional pressure relief valve is controlled by current, the current is different, and the opening pressure of the relief valve is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605623.6A CN109611493B (en) | 2018-12-27 | 2018-12-27 | Hydro-pneumatic spring damping adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811605623.6A CN109611493B (en) | 2018-12-27 | 2018-12-27 | Hydro-pneumatic spring damping adjusting device |
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| Publication Number | Publication Date |
|---|---|
| CN109611493A CN109611493A (en) | 2019-04-12 |
| CN109611493B true CN109611493B (en) | 2024-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811605623.6A Active CN109611493B (en) | 2018-12-27 | 2018-12-27 | Hydro-pneumatic spring damping adjusting device |
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| CN (1) | CN109611493B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762151B (en) * | 2019-09-17 | 2021-03-12 | 江苏恒才液压机械制造有限公司 | Built-in hydro-pneumatic spring |
| CN110617294A (en) * | 2019-09-30 | 2019-12-27 | 江苏军宏机械有限公司 | Hydraulic tension hydro-pneumatic spring oil cylinder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209458329U (en) * | 2018-12-27 | 2019-10-01 | 东风专用零部件有限公司 | A kind of hydro-pneumatic spring damping regulator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001146937A (en) * | 1999-11-22 | 2001-05-29 | Tokico Ltd | Damping force adjustable hydraulic shock absorber |
| CN102345701B (en) * | 2011-10-17 | 2013-03-13 | 江苏大学 | Vehicle oil gas spring with adjustable rigidity and damping |
| CN102720795A (en) * | 2012-06-12 | 2012-10-10 | 江苏科技大学 | Hydro-pneumatic spring for amphibious vehicles and hydraulic regulating device for hydro-pneumatic spring for amphibious vehicle |
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2018
- 2018-12-27 CN CN201811605623.6A patent/CN109611493B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209458329U (en) * | 2018-12-27 | 2019-10-01 | 东风专用零部件有限公司 | A kind of hydro-pneumatic spring damping regulator |
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| CN109611493A (en) | 2019-04-12 |
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