CN115013464A - Hydro-pneumatic spring and vehicle suspension device - Google Patents
Hydro-pneumatic spring and vehicle suspension device Download PDFInfo
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- CN115013464A CN115013464A CN202210692993.8A CN202210692993A CN115013464A CN 115013464 A CN115013464 A CN 115013464A CN 202210692993 A CN202210692993 A CN 202210692993A CN 115013464 A CN115013464 A CN 115013464A
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- piston
- oil
- pneumatic spring
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- 239000000725 suspension Substances 0.000 title claims abstract description 18
- 238000007667 floating Methods 0.000 claims abstract description 30
- 238000013016 damping Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 89
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 34
- 239000004519 grease Substances 0.000 description 25
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 239000012530 fluid Substances 0.000 description 8
- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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
- F16F9/062—Bi-tubular units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
-
- 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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
-
- 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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/368—Sealings in pistons
-
- 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
- F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
-
- 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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
-
- 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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
- F16F2222/126—Fluid damping using gases
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a hydro-pneumatic spring and a vehicle suspension device, and relates to the technical field of vehicle suspensions. The oil-gas spring comprises a cylinder body, a piston and a piston rod, wherein the piston is arranged in the cylinder body in a sliding mode, the piston is fixedly connected with the piston rod, the cylinder body is divided into a rodless cavity and a rod cavity, the piston rod is of a hollow structure, a floating piston is arranged in the hollow cavity of the piston rod, the rodless cavity comprises a first air chamber, the rod cavity comprises a first oil chamber, the floating piston divides the hollow cavity into a second oil chamber and a second air chamber, the second oil chamber is arranged between the piston and the floating piston, and the first oil chamber and the second oil chamber can be communicated. The hydro-pneumatic spring is provided with the first air chamber and the second air chamber, and the bumping of a vehicle is relieved by utilizing the volume alternation of the first air chamber and the second air chamber of the hydro-pneumatic spring; the second air chamber is arranged, so that the hydro-pneumatic spring has nonlinear elastic characteristics in the compression and recovery processes, and the phenomenon of cylinder collision is avoided. The vehicle suspension device enables the vehicle to have smoothness and comfort.
Description
Technical Field
The invention relates to the technical field of vehicle suspensions, in particular to a hydro-pneumatic spring and a vehicle suspension device.
Background
The vehicle suspension system generally adopts the hydro-pneumatic spring as a buffering and damping device, and avoids the damage to articles and vehicles caused by bumping when the vehicles run on uneven roads.
At present, the hydro-pneumatic spring adopts the oil-gas mixture structure (high-pressure nitrogen mixes with fluid) mostly, fluid and nitrogen gas direct contact, and after long-time work, nitrogen gas melts into fluid, and nitrogen gas pressure reduces, needs the user to maintain on an irregular basis, greatly increased use cost. If an external energy accumulator is adopted, the occupied space is enlarged, and the structural arrangement of the chassis is influenced; and the external energy accumulator has more complex structure and more manufacturing cost. Meanwhile, the external energy accumulator is connected through a rubber pipe, so that the risk of oil leakage is increased. The existing hydro-pneumatic spring is characterized in that a piston rod is arranged into a hollow structure, a floating piston is arranged in the hollow cavity, the floating piston divides the hollow cavity into an air chamber and a piston rod oil chamber, the upper end of the piston rod is connected with a damping valve, and the oil chamber of the piston rod is communicated with a hydro-pneumatic spring oil chamber through the damping valve. But because the space restriction is arranged to the complete machine, the hydro-pneumatic spring stroke receives the restriction, to using the operating mode extremely abominable (big slope, big undulation road surface), like vehicles such as mine truck or cross country vehicle, the problem of hitting the jar can often appear in current hydro-pneumatic spring, and then shortens hydro-pneumatic spring's life, influences the travelling comfort of vehicle moreover.
Disclosure of Invention
The invention aims to provide a hydro-pneumatic spring and a vehicle suspension device, wherein the hydro-pneumatic spring can avoid the problem of cylinder collision under the condition of severe working conditions, and the service life is prolonged; the vehicle suspension device using the hydro-pneumatic spring can not only slow down jolting of a vehicle, but also improve the comfort of the vehicle.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a hydro-pneumatic spring, includes cylinder body, piston and piston rod, the piston slide set up in the cylinder body, the piston with piston rod fixed connection, the cylinder body is separated for no pole chamber and has the pole chamber, the piston rod is hollow structure, the well intracavity of piston rod is provided with floating piston, no pole chamber includes first air chamber, there is the pole chamber to include first grease chamber, floating piston will well cavity partition is for second grease chamber and second air chamber, the second grease chamber set up in the piston with between the floating piston, just first grease chamber with second grease chamber can communicate.
As an alternative to the hydro-pneumatic spring, oil is provided in the first chamber.
As an alternative of the hydro-pneumatic spring, a damping hole is formed in the piston rod, and the first oil chamber and the second oil chamber are communicated through the damping hole.
As an alternative of the hydro-pneumatic spring, a one-way circulation hole is further formed in the piston rod and used for conducting the second oil chamber to the first oil chamber in a one-way mode.
As an alternative of the hydro-pneumatic spring, a guide ring and a first sealing ring are arranged between the piston and the inner wall of the cylinder body.
As an alternative of the oil gas spring, a first guide belt and a second sealing ring are arranged between the floating piston and the hollow cavity.
As an alternative of the hydro-pneumatic spring, one end of the cylinder body is provided with a first connecting portion, one end, away from the piston, of the piston rod is provided with a second connecting portion, one end, away from the first connecting portion, of the cylinder body is provided with a guide sleeve, and the piston rod penetrates through the guide sleeve and is connected with the second connecting portion.
As an alternative of the hydro-pneumatic spring, a second guide belt is arranged between the guide sleeve and the piston rod, and a third sealing ring is arranged between the guide sleeve and the inner wall of the cylinder body.
As an alternative of the hydro-pneumatic spring, an oil inlet is formed in the cylinder body, the oil inlet is communicated with the first oil chamber, and oil is filled into the first oil chamber and the second oil chamber through the oil inlet; the first connecting part is provided with a first inflation valve which is communicated with the first air chamber and can inflate the first air chamber; the second connecting portion are provided with second inflation valves, the second inflation valves are communicated with the second air chambers and can inflate the second air chambers.
A vehicle suspension arrangement comprising a hydro-pneumatic spring as defined in any preceding claim.
The invention has the beneficial effects that:
according to the hydro-pneumatic spring provided by the invention, the rodless cavity of the cylinder body comprises the first air chamber, and the first air chamber plays a role of an energy accumulator; the rod cavity comprises a first oil chamber, the hollow cavity of the piston rod is divided into a second oil chamber and a second air chamber through a floating piston, and the second air chamber plays the role of the other energy accumulator; the first oil chamber and the second oil chamber can communicate with each other. When hydro-pneumatic spring received the impact and compressed, first air chamber volume reduced, the volume increase of first grease chamber, the fluid entering first grease chamber of second grease chamber, simultaneously, the volume grow of second air chamber, pressure diminishes, and hydro-pneumatic spring is inside reaches new balance in the twinkling of an eye to alleviate the impact of vehicle. When the hydro-pneumatic spring extends, the volume of the first air chamber is increased, and the pressure is reduced; the volume of first grease chamber diminishes, and the fluid of first grease chamber gets into the second grease chamber, the volume increase of second grease chamber, and the volume of second gas chamber reduces, and pressure diminishes, and the inside new balanced state that reaches once more of hydro-pneumatic spring. If the hydro-pneumatic spring continues to extend until the pressure of the first air chamber is reduced to be the same as that of the second air chamber, the hydro-pneumatic spring continues to extend, the gas of the second air chamber starts to act, an elastic recovery stroke is generated, the hydro-pneumatic spring is prevented from continuing to extend, the piston is prevented from colliding with the cylinder body when the hydro-pneumatic spring is stretched to the longest extent, and the service life of the hydro-pneumatic spring is prolonged.
According to the vehicle suspension device provided by the invention, the hydro-pneumatic spring is applied, and the jolt of a vehicle is relieved by utilizing the volume alternation of the first air chamber and the second air chamber of the hydro-pneumatic spring; and the second air chamber is arranged, so that the hydro-pneumatic spring has nonlinear elastic characteristics in the compression and recovery processes, and the cylinder collision phenomenon is avoided. The vehicle suspension device enables the vehicle to have smoothness and comfort.
Drawings
FIG. 1 is a cross-sectional view of a hydro-pneumatic spring provided in accordance with an embodiment of the present invention;
FIG. 2 is a front view of a hydro-pneumatic spring provided by an embodiment of the present invention.
In the figure:
1. a cylinder body; 2. a piston; 3. a piston rod; 4. a first air chamber; 5. a first oil chamber; 6. a floating piston; 7. a second oil chamber; 8. a second air chamber; 9. a guide ring; 10. a first seal ring; 11. a first guide belt; 12. a second seal ring; 13. a first connection portion; 14. a second connecting portion; 15. a guide sleeve; 16. a second guide belt; 17. a third seal ring; 18. an oil inlet; 19. a first inflation valve; 20. a second inflation valve; 21. a damping hole; 22. and (4) a one-way flow hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, this embodiment provides a be applied to vehicle suspension device's oil gas spring, including cylinder 1, piston 2 and piston rod 3, piston 2 slides and sets up in cylinder 1, piston 2 and piston rod 3 fixed connection, cylinder 1 is separated for no rod chamber and has the pole chamber, piston rod 3 is hollow structure, be provided with floating piston 6 in the well cavity of piston rod 3, no rod chamber includes first air chamber 4, there is the pole chamber to include first grease chamber 5, floating piston 6 separates the well cavity for second grease chamber 7 and second air chamber 8, second grease chamber 7 sets up between piston 2 and floating piston 6, and first grease chamber 5 and second grease chamber 7 can communicate.
The rodless cavity of the cylinder 1 comprises a first air chamber 4, and the first air chamber 4 plays the role of an accumulator; the rod cavity comprises a first oil chamber 5, the hollow cavity of the piston rod 3 is divided into a second oil chamber 7 and a second air chamber 8 by a floating piston 6, and the second air chamber 8 plays the role of another energy accumulator; the first oil chamber 5 and the second oil chamber 7 can communicate with each other. When the hydro-pneumatic spring receives the impact and compresses, the volume of the first air chamber 4 is reduced, the volume of the first oil chamber 5 is increased, oil in the second oil chamber 7 enters the first oil chamber 5, meanwhile, the volume of the second air chamber 8 is increased, the pressure is reduced, and the interior of the hydro-pneumatic spring instantly reaches new balance to relieve the impact of a vehicle. When the hydro-pneumatic spring extends, the volume of the first air chamber 4 becomes larger, and the pressure becomes smaller; the volume of the first oil chamber 5 is reduced, oil liquid in the first oil chamber 5 enters the second oil chamber 7, the volume of the second oil chamber 7 is increased, the volume of the second air chamber 8 is reduced, the pressure is reduced, and the inside of the hydro-pneumatic spring reaches a new balance state again. If the hydro-pneumatic spring continues to extend until the pressure of the first air chamber 4 is reduced to be the same as that of the second air chamber 8, the hydro-pneumatic spring continues to extend, the gas of the second air chamber 8 starts to act, an elastic recovery stroke is generated, the hydro-pneumatic spring is prevented from extending continuously, the piston 2 is prevented from colliding with the cylinder body 1 when the hydro-pneumatic spring is stretched to the longest, and the service life of the hydro-pneumatic spring is prolonged.
Both the first chamber 4 and the second chamber 8 are filled with nitrogen gas.
As an alternative to the hydro-pneumatic spring, a guide ring 9 and a first sealing ring 10 are provided between the piston 2 and the inner wall of the cylinder 1. The guide ring 9 plays a role in supporting and guiding, the first sealing ring 10 is a high-pressure-resistant sealing ring, a rod cavity and a rodless cavity are sealed and isolated, nitrogen of the first air chamber 4 is separated from hydraulic oil of the first oil chamber 5, and the problem that the nitrogen is dissolved in the oil is avoided.
The floating piston 6 is made of lightweight materials such as aluminum alloy, the inner part of the floating piston is designed to be of a cavity structure, the floating piston is made to be as light as possible on the premise that the strength of the floating piston 6 is guaranteed, and the response speed is improved.
As an alternative to the hydro-pneumatic spring, a first guide band 11 and a second sealing ring 12 are arranged between the floating piston 6 and the hollow chamber. The first guide band 11 guides the floating piston 6 to move in the hollow cavity, can prevent the floating piston 6 and the hollow cavity from being worn, has a vibration absorbing performance, and has an excellent wear resistance. The second sealing ring 12 plays a role in sealing, so that the second oil chamber 7 and the second air chamber 8 on the upper side and the lower side of the floating piston 6 are isolated and sealed, the nitrogen of the second air chamber 8 is separated from the oil of the second oil chamber 7 through the floating piston 6, and the problem that the nitrogen is dissolved in the oil is avoided.
When the vehicle is in a static state, the pressure of the first oil chamber 5 and the second oil chamber 7 is equal to the nitrogen pressure of the second air chamber 8, and therefore the load of the hydro-pneumatic spring is equal to the nitrogen pressure difference of the first air chamber 4 and the second air chamber 8 multiplied by the sectional area of the piston 2, regardless of the mass of the piston 2 and the floating piston 6, and the friction force between the piston 2 and the first sealing ring 10 and the friction force between the floating piston 6 and the second sealing ring 12.
When the vehicle passes through the bulge or the load of the hydro-pneumatic spring is increased, the hydro-pneumatic spring is contracted, the piston 2 compresses the first air chamber 4, the volume of the first air chamber 4 is reduced, and the pressure of nitrogen in the first air chamber is increased; simultaneously, the volume grow of first grease chamber 5, the fluid of second grease chamber 7 can get into first grease chamber 5, the volume grow of second air chamber 8, and nitrogen gas pressure diminishes in it, and the inside new balanced state that reaches of hydro-pneumatic spring is in the twinkling of an eye.
When the vehicle passes through a pothole or the load of the hydro-pneumatic spring is reduced, the piston rod 3 of the hydro-pneumatic spring extends, the volume of the first air chamber 4 is increased, and the pressure of nitrogen in the first air chamber is reduced; meanwhile, the volume of the first oil chamber 5 is reduced, oil in the first oil chamber 5 can enter the second oil chamber 7, so that the volume of the first air chamber 4 is reduced, the pressure of nitrogen in the first air chamber is increased, and the inside of the hydro-pneumatic spring instantly reaches a new balance state. If the piston rod 3 continues to extend until the nitrogen pressure of the first air chamber 4 is reduced to be the same as the nitrogen pressure of the second air chamber 8, the piston rod continues to extend, the nitrogen of the second air chamber 8 starts to act, an elastic recovery stroke is generated, the piston rod 3 is prevented from continuing to extend, and the piston 2 is prevented from colliding with the cylinder body 1 when the piston rod 3 is stretched to the longest.
As an alternative of the hydro-pneumatic spring, one end of the cylinder body 1 is provided with a first connecting portion 13, one end of the piston rod 3 away from the piston 2 is provided with a second connecting portion 14, one end of the cylinder body 1 away from the first connecting portion 13 is provided with a guide sleeve 15, and the piston rod 3 passes through the guide sleeve 15 to be connected with the second connecting portion 14.
The vehicle suspension device is arranged on a chassis of a vehicle, a frame and an axle are arranged above the chassis, the first connecting portion 13 is fixedly connected with the frame, and the second connecting portion 14 is fixedly connected with the axle.
The periphery of the guide sleeve 15 is designed to be a stepped cylinder shape, and the outer diameter of the cylinder with the smaller diameter is matched with the inner diameter of the cylinder body 1 and extends into the cylinder body 1 to be matched with the piston rod 3. The cylinder with the larger diameter is arranged at the end part of one end of the cylinder body 1 far away from the first connecting part 13 and is fixedly connected with the end part of the cylinder body 1 through a screw. When the nitrogen gas of the second air chamber 8 starts to act, the piston 2 can be prevented from colliding with the guide sleeve 15 when the piston rod 3 is stretched to the longest.
As an alternative to the hydro-pneumatic spring, a second guide belt 16 is arranged between the guide sleeve 15 and the piston rod 3, and a third sealing ring 17 is arranged between the guide sleeve 15 and the cylinder body 1. The second guide belt 16 guides the movement of the piston rod 3, and the third seal ring 17 seals the first oil chamber 5 to prevent oil leakage from the first oil chamber 5.
As shown in fig. 2, as an alternative of the hydro-pneumatic spring, an oil inlet 18 is formed in the cylinder body 1, the oil inlet 18 is communicated with the first oil chamber 5, and oil is filled into the first oil chamber 5 and the second oil chamber 7 through the oil inlet 18; the first connecting part 13 is provided with a first inflation valve 19, and the first inflation valve 19 is communicated with the first air chamber 4 and can inflate the first air chamber 4; the second connecting portion 14 is provided with a second inflation valve 20, the second inflation valve 20 being in communication with the second air chamber 8 and being capable of inflating the second air chamber 8.
Four angles on the chassis of vehicle are fixed mounting respectively has a hydro-pneumatic spring, and the middle part fixed mounting on chassis has the oil pump, and the upside fixed mounting of oil pump has the hydraulic oil shunt, and the hydraulic oil shunt is connected with four hydro-pneumatic spring's oil inlet 18 respectively through four hydraulic pressure pipes for first grease chamber 5 fills fluid, the fluid of first grease chamber 5 can get into second grease chamber 7, fills up to being full of first grease chamber 5 and second grease chamber 7. An air pump is fixedly arranged on one side of the oil pump, the air pump is respectively communicated with the first inflation valve 19 and the second inflation valve 20 through air pipes, the air inlet and outlet of the first air chamber 4 are controlled through the first inflation valve 19, and the air inlet and outlet of the second air chamber 8 are controlled through the second inflation valve 20.
As an alternative to the hydro-pneumatic spring, oil is provided in the first air chamber 4. By adding a small amount of oil into the first air chamber 4, the piston 2 has good lubricity in the moving process, and meanwhile, the phenomenon that the piston 2 collides with the first connecting part 13 due to instant leakage of nitrogen in the first air chamber 4 is avoided.
The oil in the first air chamber 4 can be added in advance through the connection port of the first charging valve 19 and the first connection portion 13, and then the first charging valve 19 is connected.
With continued reference to fig. 1, as an alternative to the hydro-pneumatic spring, the piston rod 3 is provided with a damping hole 21, and the first oil chamber 5 and the second oil chamber 7 communicate through the damping hole 21. When the piston rod 3 contracts, oil in the second oil chamber 7 enters the first oil chamber 5 through the damping hole 21; when the piston rod 3 extends, the oil in the first oil chamber 5 enters the second oil chamber 7 through the orifice 21.
The damping holes 21 are provided on the circumference of the piston rod 3, and the diameter and the number of the damping holes 21 can be set according to the resistance of the oil entering the first oil chamber 5 from the second oil chamber 7 or the resistance of the oil entering the second oil chamber 7 from the first oil chamber 5 when the piston rod 3 extends and contracts.
As an alternative of the hydro-pneumatic spring, the piston rod 3 is further provided with a one-way flow hole 22, and the one-way flow hole 22 is used for one-way communication of the second oil chamber 7 to the first oil chamber 5. A one-way circulation hole 22 is formed in the circumference of the piston rod 3, and one-way circulation is achieved by providing a one-way valve in the one-way circulation hole 22.
When the piston rod 3 contracts, the oil in the second oil chamber 7 enters the first oil chamber 5 through the damping hole 21 and the one-way circulation hole 22, the damping is small, the impact on the vehicle can be absorbed, and the first air chamber 4 plays a main role at the moment; when the piston rod 3 extends, the oil in the first oil chamber 5 can only enter the second oil chamber 7 through the damping hole 21, the damping is increased, and the vibration of the vehicle can be attenuated. The piston rod 3 of the hydro-pneumatic spring has nonlinear elastic travel in the process of contracting or extending, so that the comfort of a vehicle is improved, and the piston 2 is ensured not to hit a cylinder.
The vehicle suspension device provided by the embodiment adopts the hydro-pneumatic spring, and the jolt of the vehicle is relieved by utilizing the volume alternation of the first air chamber 4 and the second air chamber 8 of the hydro-pneumatic spring; and the arrangement of the second air chamber 8 realizes that the hydro-pneumatic spring has nonlinear elastic characteristics in the compression and recovery processes, and avoids the cylinder collision phenomenon. The vehicle suspension device enables the vehicle to have smoothness and comfort.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. An oil-gas spring comprises a cylinder body (1), a piston (2) and a piston rod (3), the piston (2) is arranged in the cylinder body (1) in a sliding way, the piston (2) is fixedly connected with the piston rod (3), the cylinder body (1) is internally divided into a rodless cavity and a rod cavity, the piston rod (3) is of a hollow structure, a floating piston (6) is arranged in the hollow cavity of the piston rod (3), characterized in that the rodless chamber comprises a first gas chamber (4), the rod chamber comprises a first oil chamber (5), the floating piston (6) divides the hollow cavity into a second oil chamber (7) and a second air chamber (8), the second oil chamber (7) being arranged between the piston (2) and the floating piston (6), and the first oil chamber (5) and the second oil chamber (7) can be communicated.
2. The hydro-pneumatic spring as defined in claim 1, wherein oil is disposed within the first chamber (4).
3. Hydro-pneumatic spring according to claim 1, characterized in that a damping hole (21) is provided in the piston rod (3), the first oil chamber (5) and the second oil chamber (7) communicating through the damping hole (21).
4. Hydro-pneumatic spring according to claim 3, characterized in that the piston rod (3) is further provided with a one-way flow hole (22), the one-way flow hole (22) being used for one-way communication of the second oil chamber (7) to the first oil chamber (5).
5. Hydro-pneumatic spring according to claim 1, characterized in that a guide ring (9) and a first sealing ring (10) are arranged between the piston (2) and the inner wall of the cylinder (1).
6. Hydro-pneumatic spring according to claim 1, characterized in that a first guide band (11) and a second sealing ring (12) are arranged between the floating piston (6) and the hollow chamber.
7. The hydro-pneumatic spring as claimed in claim 1, wherein one end of the cylinder body (1) is provided with a first connecting portion (13), one end of the piston rod (3) away from the piston (2) is provided with a second connecting portion (14), one end of the cylinder body (1) away from the first connecting portion (13) is provided with a guide sleeve (15), and the piston rod (3) passes through the guide sleeve (15) to be connected with the second connecting portion (14).
8. Hydro-pneumatic spring according to claim 7, characterized in that a second guide band (16) is arranged between the guide sleeve (15) and the piston rod (3), and a third sealing ring (17) is arranged between the guide sleeve (15) and the inner wall of the cylinder body (1).
9. The hydro-pneumatic spring as defined in claim 7, wherein the cylinder body (1) is provided with an oil inlet (18), the oil inlet (18) is communicated with the first oil chamber (5), and the first oil chamber (5) and the second oil chamber (7) are filled with oil through the oil inlet (18); the first connecting part (13) is provided with a first inflation valve (19), and the first inflation valve (19) is communicated with the first air chamber (4) and can inflate the first air chamber (4); the second connecting portion (14) is provided with a second inflation valve (20), and the second inflation valve (20) is communicated with the second air chamber (8) and can inflate the second air chamber (8).
10. A vehicle suspension arrangement comprising a hydro-pneumatic spring as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210692993.8A CN115013464A (en) | 2022-06-17 | 2022-06-17 | Hydro-pneumatic spring and vehicle suspension device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210692993.8A CN115013464A (en) | 2022-06-17 | 2022-06-17 | Hydro-pneumatic spring and vehicle suspension device |
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| CN115013464A true CN115013464A (en) | 2022-09-06 |
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|---|---|---|---|
| CN202210692993.8A Pending CN115013464A (en) | 2022-06-17 | 2022-06-17 | Hydro-pneumatic spring and vehicle suspension device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268505A (en) * | 2022-09-30 | 2022-11-01 | 临工重机股份有限公司 | Anti-collision method for working platform of aerial work platform and aerial work platform |
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| CN115268505A (en) * | 2022-09-30 | 2022-11-01 | 临工重机股份有限公司 | Anti-collision method for working platform of aerial work platform and aerial work platform |
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