CN108638778B - Built-in single capsule suspension gas spring - Google Patents

Built-in single capsule suspension gas spring Download PDF

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Publication number
CN108638778B
CN108638778B CN201810628135.0A CN201810628135A CN108638778B CN 108638778 B CN108638778 B CN 108638778B CN 201810628135 A CN201810628135 A CN 201810628135A CN 108638778 B CN108638778 B CN 108638778B
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China
Prior art keywords
cylinder barrel
capsule
inner cylinder
oil chamber
oil
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CN108638778A (en
Inventor
杨德君
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Sichuan Site Vehicle Chassis Technology Co Ltd
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Sichuan Site Vehicle Chassis Technology Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/26Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
    • B60G11/265Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs hydraulic springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/26Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
    • B60G11/27Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs wherein the fluid is a gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10Type of spring
    • B60G2202/15Fluid spring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10Type of spring
    • B60G2202/15Fluid spring
    • B60G2202/152Pneumatic spring

Abstract

The invention discloses a suspension gas spring with a built-in single capsule, which comprises a cylinder cover, an outer cylinder barrel, an inner cylinder barrel, a piston rod and a capsule, wherein an air charging port is arranged on the outer cylinder barrel, the inner cylinder barrel is fixed in the outer cylinder barrel through the cylinder cover, a piston used for dividing the inner cylinder barrel into a first oil chamber and a second oil chamber is movably arranged in the inner cylinder barrel, the piston rod extends into the inner cylinder barrel and is fixedly connected with the piston, the capsule is fixed between the outer cylinder barrel and the inner cylinder barrel, a third oil chamber is formed between the capsule and the inner cylinder barrel, and an air chamber is formed between the capsule and the outer cylinder barrel; the third oil chamber is communicated with the first oil chamber, the first oil chamber is communicated with the second oil chamber, and the air chamber is communicated with the air-entrapping port. The invention can keep the height of the vehicle body from the ground and the spring bias frequency unchanged when the static load of the vehicle changes, and can keep consistent smoothness and controllability no matter no load or heavy-load vehicles.

Description

Built-in single capsule suspension gas spring
Technical Field
The invention relates to the field of automobile suspension systems, in particular to a gas spring with a built-in single-capsule suspension.
Background
The automobile suspension system is a connecting structure system among a vehicle body, a vehicle frame and wheels, and the connecting structure system comprises a shock absorber, a suspension spring, an anti-tilting rod, a suspension secondary beam, a lower control arm, a longitudinal rod, a steering knuckle arm, a rubber bushing, a connecting rod and the like. When the automobile runs on a road surface, the automobile is subjected to vibration and impact due to the change of the ground, and part of the force of the impact is absorbed by the tire, but most of the force is absorbed by a suspension device between the tire and the automobile body.
In an automobile suspension system, a hydro-pneumatic spring is a suspension elastic damping element with excellent performance, is a core part of an hydro-pneumatic suspension, has damping characteristics and nonlinear stiffness characteristics, takes inert nitrogen as an elastic element, realizes vibration reduction by utilizing the flow resistance of oil, and realizes more accurate motion and force transmission by utilizing the incompressibility of the oil. The hydro-pneumatic spring has the variable stiffness characteristic, so that a vehicle provided with the hydro-pneumatic suspension can obtain lower natural vibration frequency, the labor condition of a driver is improved, the average vehicle speed is improved, and the hydro-pneumatic spring can also realize the adjustment of the vehicle body height.
The prior art with Chinese patent publication No. CN104047987A discloses a novel oil-gas spring in 9.17.2014.A first semispherical chamber is arranged in an inner cavity of an upper flying ring fixing device, a rubber oil-gas diaphragm is arranged at the upper opening of a working cylinder barrel, the first semispherical chamber and the rubber oil-gas diaphragm form a sealed high-pressure air chamber filled with high-pressure air, a sealed rodless cavity is formed by the rubber oil-gas diaphragm, the inner wall of the working cylinder barrel and a piston positioned below the rubber oil-gas diaphragm, an annular cavity is formed by the piston, the outer wall of a piston rod, the inner wall of the working cylinder barrel and the lower wall, and an air bag and a damping valve are arranged in; the side wall of the damping valve is provided with four second trapezoidal through holes which are uniformly distributed along the radial direction, and the side wall of the piston rod is provided with four first trapezoidal through holes which are uniformly distributed along the radial direction and are positioned at the same radial position with the four second trapezoidal through holes. The working principle of the patent is as follows: when the static load of the vehicle changes, the outward thrust of the piston rod is changed by filling and discharging oil into and from the oil chamber, so that the aim of maintaining the height of the chassis unchanged is fulfilled. However, in the actual use process, the static volume of the air chamber changes due to load change, so that under different load conditions, the static volume of the air chamber is different, the spring stiffness and the load mass are not in a linear relation, the spring offset frequency increases with the increase of the load and decreases with the decrease of the load, and no stable offset frequency exists. And the lifting speed of the vehicle chassis is low because the flow resistance of oil in the oil pipe is large and is limited by the drift diameter of the valve.
In addition, the existing automobile suspension also commonly uses a rubber air spring, but the working pressure of the rubber air spring is lower, generally about 0.6MPa, and is limited by the radial size of a leather bag, the tonnage capable of bearing the vehicle load generally does not exceed 3.5 tons, and the defect of narrow application range exists. Accordingly, when the vehicle load changes greatly, the air pressure in the air bag changes, the outer diameter of the air bag changes, and the pressure bearing area of the piston changes along with the change, so that although the chassis height can be kept unchanged by charging and discharging the air pressure in the air bag during load change, because the rigidity change and the load mass are not in a linear relation, the smaller the load, the higher the offset frequency, the smaller the load, the smaller the offset frequency, and the unstable suspension offset frequency still exists.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a built-in single-capsule suspension gas spring, which can keep the ground clearance of a vehicle body and the bias frequency of the spring constant when the static load of the vehicle is changed, and can keep consistent smoothness and controllability no matter whether the vehicle is in a no-load or heavy-load state.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a built-in single capsule suspension gas spring which characterized in that: the oil cylinder comprises a cylinder cover, an outer cylinder barrel, an inner cylinder barrel, a piston rod and a capsule, wherein an air inlet is formed in the outer cylinder barrel, the inner cylinder barrel is fixed in the outer cylinder barrel through the cylinder cover, a piston used for dividing the inner cylinder barrel into a first oil chamber and a second oil chamber is movably arranged in the inner cylinder barrel, the piston rod extends into the inner cylinder barrel and is fixedly connected with the piston, the capsule is fixed between the outer cylinder barrel and the inner cylinder barrel, a third oil chamber is formed between the capsule and the inner cylinder barrel, and an air chamber is formed between the capsule and the outer cylinder barrel; the third oil chamber is communicated with the first oil chamber, the first oil chamber is communicated with the second oil chamber, and the air chamber is communicated with the air-entrapping port.
The axial leads of the capsule, the outer cylinder barrel, the inner cylinder barrel and the piston rod are all on the same straight line.
The piston is axially provided with a damping oil hole, and a damping valve component is arranged in the damping oil hole; the piston is radially provided with a second oil hole communicated with the damping oil hole, and the first oil chamber is communicated with the second oil chamber through the damping oil hole and the second oil hole.
A plurality of first oil holes are formed in the inner cylinder barrel, and the first oil chamber is communicated with the third oil chamber through the first oil holes.
The cylinder cover comprises a cover plate and an annular groove which is integrally formed on the cover plate, and the annular groove is located between the outer cylinder barrel and the inner cylinder barrel.
The capsule is of a cylindrical structure, annular cuffs are fixedly arranged on the inner walls of two ends of the capsule, the annular cuffs of one end of the capsule are arranged in the annular grooves of the cylinder cover in an interference mode, and the annular cuffs of the other end of the capsule are arranged in the annular waist grooves of the waist of the inner cylinder barrel in an interference mode.
The annular cuff at one end of the capsule is fixed in the annular groove of the cylinder cover through the outer cylinder barrel, and the annular cuff at the other end of the capsule is fixed in the annular waist groove at the waist part of the inner cylinder barrel through the snap ring.
An upper supporting ring is arranged between the piston and the inner cylinder barrel.
A sealing assembly and a lower supporting ring are arranged between the piston rod and the inner cylinder barrel, and a sealing ring is arranged between the inner cylinder barrel and the outer cylinder barrel.
The cylinder cover is fixedly provided with a first connecting piece, and the piston rod is fixedly provided with a second connecting piece.
The inner bottom of the inner cylinder barrel is fixedly provided with a tensile limiting rubber block, and the second connecting piece is fixedly provided with a compression limiting rubber block.
The invention has the advantages that:
1. the single-capsule gas spring comprises a cylinder cover, an outer cylinder barrel, an inner cylinder barrel, a piston rod and a capsule, and forms a first oil chamber, a second oil chamber, a third oil chamber and an air chamber. Therefore, when the static load of the vehicle changes, the suspension offset frequency can be kept stable, and the purpose of keeping good and stable smoothness of the vehicle on the premise of excellent controllability and safe driving can be further achieved.
2. The capsule, the piston rod and the inner cylinder barrel are concentrically arranged, so that the stroke of the spring can be designed to be larger in the limited height space of the automobile suspension, and the vehicle chassis has better trafficability. In addition, in the actual use process, the deformation of the capsule along with the inlet and outlet of the piston rod into and out of the inner cylinder barrel is radial deformation, when the length of the capsule is designed to be long enough, the radial expansion and contraction rate of the capsule are small, and the service life of the capsule can be ensured to be long enough.
3. According to the invention, the damping valve assembly is axially arranged on the piston, and the damping valve assembly is connected with the second oil hole to form the oil passage of the first oil chamber and the second oil chamber, and provides bidirectional damping for flowing oil, so that the damping of the vibration of a vehicle body is facilitated.
4. The capsule is designed into a cylindrical structure, so that the capsule is not only favorable for manufacturing, mounting and fixing, but also favorable for interference sealing of annular cuffs at two ends of the capsule, and reliably isolates oil in an oil chamber from gas in a gas chamber.
5. The annular cuff at one end of the capsule is arranged between the annular groove of the cylinder cover and the outer cylinder barrel in an interference manner, and the annular cuff at the other end of the capsule is arranged between the annular waist groove at the waist of the inner cylinder barrel and the snap ring in an interference manner, so that when the capsule expands and contracts, the annular cuffs at the two ends can stably seal gas in the gas chamber and liquid in the third oil chamber.
6. The invention can prevent rigid collision between the piston and the inner cylinder barrel and between the second connecting piece and the outer cylinder barrel through the stretching limiting rubber block and the compressing limiting rubber block.
7. The invention has compact structure, the working pressure of the air chamber is up to 10MPa, the spring of up to 4 tons can be loaded, and the outer diameter is not more than 140 mm; the device is suitable for being installed and used in models of commercial passenger cars, commercial trucks, military transport vehicles and the like, and can also be used in other types of vehicles with low requirements.
8. The invention has simple structure, easy manufacture, low maintenance cost and long service life.
Drawings
Fig. 1 is a schematic structural view of embodiment 1.
Fig. 2 is a schematic structural view of embodiment 2.
Labeled as: 1. the oil cylinder comprises a first connecting piece, 2, an oil hole, 3, an annular cuff, 4, an outer cylinder barrel, 5, a piston, 6, a capsule, 7, a damping oil hole, 8, an inner cylinder barrel, 9, a second oil chamber, 10, a stretching limiting rubber block, 11, an upper supporting ring, 12, a sealing assembly, 13, a second connecting piece, 14, a compression limiting rubber block, 15, a piston rod, 16, a lower supporting ring, 17, a sealing ring, 18, an air chamber, 19, a clamping ring, 20, a cylinder cover, 21, an air charging port, 22, a second oil hole, 23, a third oil chamber, 24, a damping valve assembly, 25 and a first oil chamber.
Detailed Description
Example 1
A suspension gas spring with a built-in single capsule comprises a cylinder cover 20, an outer cylinder 4, an inner cylinder 8, a piston rod 15 and a capsule 6, wherein an air inlet 21 is formed in the outer cylinder 4, the inner cylinder 8 is fixed in the outer cylinder 4 through the cylinder cover 20, a piston 5 used for dividing the inner cylinder 8 into a first oil chamber 25 and a second oil chamber 9 is movably arranged in the inner cylinder 8, the piston rod 15 extends into the inner cylinder 8 and is fixedly connected with the piston 5, the capsule 6 is fixed between the outer cylinder 4 and the inner cylinder 8, a third oil chamber 23 is formed between the capsule 6 and the inner cylinder 8, and an air chamber 18 is formed between the capsule 6 and the outer cylinder 4; the third oil chamber 23 communicates with the first oil chamber 25, the first oil chamber 25 communicates with the second oil chamber 9, and the air chamber 18 communicates with the gas-charging port 21.
In this embodiment, the piston 5 has an oil damping hole 7 axially formed therein, and a damping valve assembly 24 is installed in the oil damping hole 7, where the damping valve assembly 24 provides a damping channel for oil in the first oil chamber 25 and the second oil chamber 9. The piston 5 is radially provided with a second oil hole 22 communicated with the damping oil hole 7, and the first oil chamber 25 is communicated with the second oil chamber 9 through the damping oil hole 7 and the second oil hole 22. A plurality of first oil holes 2 are formed in the inner cylinder 8, and the first oil chamber 25 is communicated with the third oil chamber 23 through the first oil holes 2. Wherein, the first oil hole 2 can be round, square, etc., and the second oil hole 22 can be round, square, triangle, etc.
In this embodiment, the capsule 6 has a cylindrical structure, and preferably, the capsule 6 has a conical or cylindrical structure; all fixedly on the inner wall at 6 both ends of capsule be provided with annular cuff 3, and 3 interference of annular cuff of 6 one ends of capsule are installed in the annular groove of cylinder cap 20, and 3 interference of annular cuff of the 6 other ends of capsule are installed in the annular waist inslot of 8 waists of inner tube, and is concrete, and 3 annular cuffs of 6 one ends of capsule are fixed in the annular groove of cylinder cap 20 through outer cylinder 4, and 3 annular cuffs of the other end pass through snap ring 19 to be fixed in the annular waist inslot of 8 waists of inner tube. And the axial leads of the installed capsule 6, the outer cylinder 4, the inner cylinder 8 and the piston rod 15 are all on the same straight line. Furthermore, the wall thickness of the annular cuff 3 at the upper end of the capsule 6 and the wall thickness of the annular cuff 3 at the lower end of the capsule 6 are both more than 1 time greater than that of other parts of the capsule 6, and the width of the annular cuff 3 is not less than the wall thickness of the cuff.
In this embodiment, the cylinder head 20 includes a cover plate and an annular groove integrally formed on the cover plate, and the annular groove is located between the outer cylinder 4 and the inner cylinder 8. The outer cylinder barrel 4 is of a structure with an opening at the upper end and a step hole and a through hole at the lower end, and the step hole is matched with the outer diameter of the inner cylinder barrel 8; the inner cylinder barrel 8 is provided with an opening at the upper end, the lower end is provided with a structure of a through hole, and the through hole at the lower end of the inner cylinder barrel 8 is the same as the through hole at the lower end of the outer cylinder barrel 4 in aperture. During installation, one end of the inner cylinder barrel 8, which is provided with the through hole, is installed in the step hole of the outer cylinder barrel 4, the other end of the inner cylinder barrel is fixed through the cylinder cover 20, and the piston rod 15 sequentially penetrates through the through hole of the outer cylinder barrel 4 and the through hole of the inner cylinder barrel 8 and then is connected with the piston 5. Further, a first connecting piece 1 is fixedly arranged on the cylinder cover 20, a second connecting piece 13 is fixedly arranged on the piston rod 15, and the gas spring is fixedly connected with the automobile suspension and the automobile body through the first connecting piece 1 and the second connecting piece 13 respectively. Furthermore, a stretching limiting rubber block 10 is fixedly arranged at the inner bottom of the inner cylinder barrel 8, and the stretching limiting rubber block 10 is sleeved on the periphery of the piston rod 15; a compression limiting rubber block 14 is fixedly arranged on the second connecting piece 13, and the compression limiting rubber block 14 is arranged at the joint of the second connecting piece 13 and the piston rod 15.
In this embodiment, a seal ring 17 is arranged between the inner cylinder 8 and the outer cylinder 4, and the seal ring 17 is arranged between the step hole of the outer cylinder 4 and the inner cylinder 8; a sealing assembly 12 and a lower support ring 16 are arranged between the piston rod 15 and the inner cylinder 8, and the number of the lower support rings 16 can be two according to requirements.
The working principle of the embodiment is as follows:
wheel runout during vehicle driving
1. When the wheel jumps up, the piston rod 15 drives the piston 5 to move towards the interior of the cylinder (upwards), the volume of the second oil chamber 9 is increased, the volume of the first oil chamber 25 is reduced, partial oil in the first oil chamber 25 is sucked into the second oil chamber 9 through the damping valve assembly 24 arranged in the damping oil hole 7 and the second oil hole 22, meanwhile, the partial oil generates spring compression damping force when passing through the damping valve assembly 24, the other part of oil is pressed into the third oil chamber 23 through the first oil hole 2 to increase the oil volume of the third oil chamber 23, so that the capsule 6 is forced to expand, the volume of the air chamber 18 is reduced, the gas pressure is increased, and the elastic force of the gas spring is increased.
2. When the wheel jumps down, the piston rod 15 drives the piston 5 to move outwards (downwards), the volume of the second oil chamber 9 is reduced, the volume of the first oil chamber 25 is increased, oil in the second oil chamber 9 is pressed into the first oil chamber 25 through the second oil hole 22 and the damping valve assembly 24 installed in the damping oil hole 7, the oil in the third oil chamber 23 is sucked into the first oil chamber 25 through the first oil hole while the spring stretching damping force is generated when the damping valve assembly 24 passes through the damping valve assembly 24, so that the oil volume of the third oil chamber 23 is reduced, the capsule 6 is forced to contract, the volume of the air chamber 18 is increased, and the elastic force of the gas spring is reduced.
Second, the lifting of the car body when the load is not changed
1. And (3) lifting the vehicle body: the air chamber 18 is filled with air through the air filling port 21, the volume of the air chamber 18 is increased, the capsule 6 contracts and extrudes oil in the third oil chamber 23 to enter the first oil chamber 25, so that the piston rod 15 is pushed out of the inner cylinder 8, the vehicle body rises along with the piston rod, and when the vehicle body rises to a set value, the air filling port 21 stops filling air
2. And (3) reducing the vehicle body: the air chamber 18 is deflated through the air charging port 21, the volume of the air chamber 18 is reduced, the capsule 6 is expanded to enable oil in the first oil chamber 25 to enter the third oil chamber 23, the piston rod 15 extends into the inner cylinder 8, the vehicle body is lowered along with the piston rod, and when the vehicle body is raised to a set value, the air charging port 21 stops discharging air.
Third, vehicle static load variation
1. When the static load is increased, the height of the vehicle body is reduced, at the moment, gas is filled into the gas chamber 18 through the gas filling port 21, the pressure of the gas chamber 18 is increased, the oil liquid in the capsule 6, the third oil chamber 23 and the first oil chamber 25 is transmitted to the piston rod 15, the elastic force of the gas spring is increased, the gravity of the sprung load is balanced, and when the vehicle body returns to the set height, the gas filling port 21 stops filling gas.
2. When the static load is reduced, the height of the vehicle body is increased, at the moment, the air is exhausted through the air charging port 21, the pressure of the air chamber 18 is reduced, the oil liquid in the capsule 6, the third oil chamber 23 and the first oil chamber 25 is transmitted to the piston rod 15, the elastic force of the gas spring is reduced, the gravity of the sprung load is balanced, and when the vehicle body returns to the set height, the air charging port 21 stops discharging air.
When the load changes, the air chamber 18 is inflated and deflated through the inflation port 21 to increase and decrease the pressure of the air chamber 18 so as to maintain the constant height of the vehicle body, the volume of the air chamber 18 is not changed, the stiffness of the gas spring is only in direct proportion to the mass of the load, and the spring bias frequency is in inverse proportion to the sprung mass, so the spring bias frequency cannot change due to the change of the load.
Example 2
This example is substantially the same as example 1, with the main differences: an upper supporting ring 11 is arranged between the piston 5 and the inner cylinder 8.
The embodiments described herein are merely preferred embodiments for implementing the functions and capabilities of the present invention and obvious modifications to the structure could be made by those skilled in the art without departing from the essential function of the present invention.

Claims (10)

1. Built-in single capsule suspension gas spring, its characterized in that: the oil cylinder comprises a cylinder cover (20), an outer cylinder barrel (4), an inner cylinder barrel (8), a piston rod (15) and a capsule (6), wherein an air charging port (21) is formed in the outer cylinder barrel (4), the inner cylinder barrel (8) is fixed in the outer cylinder barrel (4) through the cylinder cover (20), the inner cylinder barrel (8) is internally and movably provided with a piston (5) used for dividing the inner cylinder barrel (8) into a first oil chamber (25) and a second oil chamber (9), the piston rod (15) extends into the inner cylinder barrel (8) and is fixedly connected with the piston (5), the capsule (6) is fixed between the outer cylinder barrel (4) and the inner cylinder barrel (8), a third oil chamber (23) is formed between the capsule (6) and the inner cylinder barrel (8), and an air chamber (18) is formed between the capsule (6) and the outer cylinder barrel (4); the third oil chamber (23) is communicated with the first oil chamber (25), the first oil chamber (25) is communicated with the second oil chamber (9), and the air chamber (18) is communicated with the gas filling port (21).
2. The built-in single capsule suspension gas spring according to claim 1, wherein: the axial leads of the capsule (6), the outer cylinder barrel (4), the inner cylinder barrel (8) and the piston rod (15) are all on the same straight line.
3. The built-in single-capsule suspension gas spring according to claim 1 or 2, wherein: the piston (5) is axially provided with a damping oil hole (7), and a damping valve assembly (24) is arranged in the damping oil hole (7); and a second oil hole (22) communicated with the damping oil hole (7) is radially formed in the piston (5), and the first oil chamber (25) is communicated with the second oil chamber (9) through the damping oil hole (7) and the second oil hole (22).
4. The built-in single capsule suspension gas spring according to claim 1, wherein: a plurality of first oil holes (2) are formed in the inner cylinder barrel (8), and the first oil chamber (25) is communicated with the third oil chamber (23) through the first oil holes (2).
5. The built-in single capsule suspension gas spring according to claim 1, wherein: the cylinder cover (20) comprises a cover plate and an annular groove integrally formed on the cover plate, and the annular groove is located between the outer cylinder barrel (4) and the inner cylinder barrel (8).
6. The built-in single capsule suspension gas spring according to any one of claims 1, 2, 4 or 5, wherein: the capsule (6) is of a cylindrical structure, annular cuffs (3) are fixedly arranged on the inner walls of two ends of the capsule (6), the annular cuffs (3) at one end of the capsule (6) are arranged in the annular groove of the cylinder cover (20) in an interference mode, and the annular cuffs (3) at the other end of the capsule (6) are arranged in the annular waist groove at the waist of the inner cylinder barrel (8) in an interference mode.
7. The built-in single capsule suspension gas spring according to claim 6, wherein: the annular cuff (3) at one end of the capsule (6) is fixed in the annular groove of the cylinder cover (20) through the outer cylinder barrel (4), and the annular cuff (3) at the other end is fixed in the annular waist groove at the waist of the inner cylinder barrel (8) through the snap ring (19).
8. The built-in single capsule suspension gas spring according to claim 1, wherein: an upper supporting ring (11) is arranged between the piston (5) and the inner cylinder barrel (8).
9. The built-in single capsule suspension gas spring according to any one of claims 1, 2, 4, 5 or 8, wherein: a sealing assembly (12) and a lower supporting ring (16) are arranged between the piston rod (15) and the inner cylinder barrel (8), and a sealing ring (17) is arranged between the inner cylinder barrel (8) and the outer cylinder barrel (4).
10. The built-in single capsule suspension gas spring according to claim 1, wherein: the cylinder cover (20) is fixedly provided with a first connecting piece (1), and the piston rod (15) is fixedly provided with a second connecting piece (13).
CN201810628135.0A 2018-06-19 2018-06-19 Built-in single capsule suspension gas spring Active CN108638778B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109551985A (en) * 2018-11-26 2019-04-02 安路普(北京)汽车技术有限公司 A kind of air spring assembly and airsuspension system
CN110296175A (en) * 2019-07-19 2019-10-01 娄底市中兴液压件有限公司 Pneumatic cylinder and vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1858459A (en) * 2006-04-29 2006-11-08 杨德君 Intelligent gas spring
CN102330774A (en) * 2011-07-17 2012-01-25 贺劼 Air spring with stiffness adjusted by filler and pressure and step-pressure buffer
CN202158128U (en) * 2011-07-17 2012-03-07 贺劼 Air spring with rigidity adjusted by volume and pressure and having phase step pressure buffering
CN202349085U (en) * 2011-11-30 2012-07-25 北京吉信气弹簧制品有限公司 Ultra-long-stroke rigid locking adjustment level type gas spring
CN102889329A (en) * 2012-07-18 2013-01-23 宁波南方减震器制造有限公司 High-pressure absorber with double cylinders provided with floating piston assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1858459A (en) * 2006-04-29 2006-11-08 杨德君 Intelligent gas spring
CN102330774A (en) * 2011-07-17 2012-01-25 贺劼 Air spring with stiffness adjusted by filler and pressure and step-pressure buffer
CN202158128U (en) * 2011-07-17 2012-03-07 贺劼 Air spring with rigidity adjusted by volume and pressure and having phase step pressure buffering
CN202349085U (en) * 2011-11-30 2012-07-25 北京吉信气弹簧制品有限公司 Ultra-long-stroke rigid locking adjustment level type gas spring
CN102889329A (en) * 2012-07-18 2013-01-23 宁波南方减震器制造有限公司 High-pressure absorber with double cylinders provided with floating piston assembly

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