CN2704720Y - Gasbag air springs - Google Patents
Gasbag air springs Download PDFInfo
- Publication number
- CN2704720Y CN2704720Y CN 200420062504 CN200420062504U CN2704720Y CN 2704720 Y CN2704720 Y CN 2704720Y CN 200420062504 CN200420062504 CN 200420062504 CN 200420062504 U CN200420062504 U CN 200420062504U CN 2704720 Y CN2704720 Y CN 2704720Y
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- CN
- China
- Prior art keywords
- cylinder body
- damping piston
- air bag
- piston
- cylinder block
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a gasbag air spring, comprising a cylinder block, a damping piston arranged in the cylinder block, a piston rod one end of which penetrates out of the cylinder block and which is connected to the damping piston, and a frame oil seal and a frame which are arranged between the cylinder block and the piston rod. The utility model is characterized in that an air bag the open end of which is adjacent to the rear part of the cylinder block is fixed in the cylinder block, and the air bag isolates the oil chamber and the air chamber of the cylinder block. The utility model realizes the isolation of the oil liquid and the pressure air in the cylinder block via the air bag, which makes the isolation of the gas and the liquid reliable, and when the piston rod is pressed into the cylinder block, the damping piston pushes the oil liquid to compress the air in the air bag to make the periphery of the air bag deform. Because the air bag doesn't generate the frictional resistance with the inner wall of the cylinder block, the operation becomes easy. When the damping piston rod is ejected, the reset force of the damping piston increases, which makes the operation and the utilization easy and reliable and guarantees the working performance of the air spring.
Description
Technical field
The utility model relates to a kind of air spring, especially relates to a kind of Balloon-Type Gas Spring.
Background technique
Present disclosed air spring is seen shown in Fig. 1,2, mainly by cylinder body 2 ', the damping piston 3 of cylinder body 2 ' interior ' and piston rod 1 ' form.Be provided with air cavity and oil pocket in the cylinder body, contain pressed gas in the air cavity is equipped with fluid in the oil pocket, by the separator piston in the cylinder body 4 ' air cavity is separated with oil pocket.Because damping piston occupies the cylinder body fixed volume, so during work, in damping piston-rod is pressed into cylinder body, damping piston is done axial motion in cylinder body, fluid in the damping piston extruding oil pocket, and fluid forces separator piston to move axially to air cavity one side, the gas in the compression air cavity; After the external force of damping piston-rod disappeared, then the gas in the air cavity expanded, and made gas promote separator piston to oil pocket one side shifting, and fluid promotes damping piston and resets, and realizes damped motion.But with separator piston that cylinder body matches is to be made of piston seat and the seal ring that is contained in the piston seat outer circumferential groove, and in use mainly have following problem: 1, fabricating cost height, working life is short.Separator piston can be moved axially in cylinder body, has excellent sealing performance again, therefore require highi degree of accuracy to cooperate between separator piston and the cylinder body, the matching gap of cylinder body and seal ring is reduced, and this not only increases fabricating cost, and in the using process, can make the friction increase because of seal ring and lubricating cylinders are bad, making it matching gap increases, and loses sealability, reduction of service life.2, operation is not light.Owing to exist surface friction drag between separator piston and the inboard wall of cylinder block, therefore damping piston all need overcome the frictional resistance between separator piston and the casing wall when to-and-fro motion, there is the problem that operation is not light and the damping piston spring-back force reduces, especially it is more little to work as the separator piston matching gap, frictional resistance is just big more, and piston rod is pressed into cylinder body and also just requires great effort more; And matching gap is big, and frictional resistance one is little, and the sealability of separator piston is descended, and influences the functional reliability of air spring.
In addition, traditional air spring cylinder body 2 ' outer wall on be pressed with slot rolling 2 '-1, on cylinder wall, form an inside annular protrusion, by the annular protrusion on the casing wall damping piston is carried out axial limiting.There is following problem in the cylinder body of this structure: the thrust that 1, increases damping piston-rod.Because the side of annular protrusion is an arc, therefore behind return under the initial pressure effect of damping piston at oil pressure and air pressure, corner of table contacting point easy and annular protrusion produces certain coupling mechanism force, so when again damping piston-rod being pressed into cylinder body, just must at first overcome the coupling mechanism force at this place, and increase the thrust of damping piston-rod.2, the air spring working stroke is inaccurate.Add man-hour in that cylinder body is carried out slot rolling,, make the conformity of piston rod extrusion e relatively poor, therefore influence the accuracy of air spring working stroke owing to be subjected to the influence of hobboing cutter size and slot rolling depth dimensions error etc.3, tensile strength is low.Because the bulge loop on the cylinder wall is as limiting stopper, therefore when the piston rod tension, damping piston can make the distortion of cylinder body internal projecting ring, not only influences the tensile strength of air spring, and causes damping piston to locate, and changes the working stroke of piston.4, be difficult for carrying out coating process.Because the groove on the cylinder body periphery is difficult for handling, and influences the product surface coating performance.
Summary of the invention
It is light that the purpose of this utility model provides a kind of operation, the service-strong Balloon-Type Gas Spring.
It is reliable that another purpose of the present utility model provides a kind of damping piston location, guarantees pistons work stroke unanimity, the Balloon-Type Gas Spring that tensile strength is high.
The utility model is that the technological scheme that achieves the above object is: a kind of Balloon-Type Gas Spring, comprise cylinder body, be arranged on the damping piston in the cylinder body, be connected on the damping piston and an end passes the piston rod of cylinder body, be arranged on outside framework oil seal and skeleton between cylinder body and the piston rod, described cylinder body internal fixation is equipped with air bag, and the opening end of air bag is near the rear portion of cylinder body, and air bag is isolated oil pocket in the cylinder body and air cavity.
The utility model is that the technological scheme that reaches above-mentioned another purpose is: the casing wall of described cylinder body is isometrical, be set with cylindrical skeleton, lips outside framework oil seal and lubrication retainer on the piston rod successively, cylindrical skeleton is connected on the cylinder body, damping piston is in original state, and the end face of cylindrical skeleton and the end face of damping piston join.
After the utility model adopts technique scheme, 1, operation is light.The utility model has replaced separator piston with air bag, by air bag fluid in the cylinder body and pressed gas are realized isolating, not only gas, liquid are isolated reliable, and be pressed in the cylinder body when piston rod, damping piston promotes the air in the fluid compressing gasbag, makes the air bag peripheral distortion, owing to do not exist with inboard wall of cylinder block and produce frictional resistance, therefore operate lightly, especially when ejecting piston rod, the damping piston reposition force increases.2, easy for installation, use reliable.Air bag of the present utility model is fixedly connected in the cylinder body, because the air bag opening joint is static the connection, not only air bag connects reliable, and has an excellent sealing performance, because air pressure, hydraulic coupling and expansive force all act on the balloon side sidepiece, so can guarantee the service behaviour of air spring, use reliable.3, rational in infrastructure.The utility model is provided with in cylinder body and is exclusively used in the cylindrical skeleton that makes the damping piston location, cancelled the structure that slot rolling is located damping piston on cylinder body, adopt damping piston plane and cylindrical skeleton plane to realize the structure of plane positioning, not only reduce the input of slot rolling man-hour and slot rolling equipment, and the structure that damping piston is positioned with cylindrical skeleton, solved former cylinder body slot rolling and damping piston location and caused the piston rod extrusion inconsistent, there are the problem of coupling mechanism force in pistons work stroke instability and damping piston and slot rolling high spot.4, beautiful shape.Behind the cylinder body cancellation slot rolling of the present utility model, profile is clean and tidy, is convenient to application processing.5, the tensile strength height of air spring.The utility model is owing to cancelled slot rolling on the cylinder body, and cylindrical skeleton can bear bigger tensile strength, so can improve the tensile strength of air spring greatly, prolongs the working life of product.6, noise is little.The utility model is equipped with damper cap in cylinder ends, avoids when piston rod reaches range, and fastening piece on the piston rod or link and cylinder body end oral area produce metal bump and to the destruction of its cover coat.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is further described in detail.
Fig. 1 is a kind of structural representation of former air spring.
Fig. 2 is the another kind of structural representation of former air spring.
Fig. 3 is a kind of structural representation of the present utility model.
Fig. 4 is an another kind of structural representation of the present utility model.
Fig. 5 is another structural representation of the present utility model.
Embodiment
Balloon-Type Gas Spring as shown in Figure 3, comprise cylinder body 8, be arranged on the damping piston 6 in the cylinder body 8, on the damping piston 6 riveted joint piston rods 1, one end of piston rod 1 passes cylinder body 8 and is connected with operation piece, cylinder body 8 internal fixation are equipped with air bag 9, the opening end of air bag 9 is near the rear portion of cylinder body 8, its opening end is fitted in the cylinder body 8 by snap ring 11, also can air bag 9 be fixedly connected in the cylinder body 8 by other structure, and the utility model can be realized oil pocket 7 in the cylinder body 8 and air cavity 10 to isolate by air bag 9, not only easy for installation, simplify technology, and use reliably, improved the operating characteristics of air spring.
As shown in Figure 3, the casing wall of cylinder body 8 of the present utility model is isometrical, be set with cylindrical skeleton 5 on the piston rod 1 successively, lips outside framework oil seal 3 and lubrication retainer 4, cylindrical skeleton 5 is made for whole combination and with metallic material, cylindrical skeleton 5 is fixedly connected on the cylinder body 8, lubrication retainer 4 also is tubular and is contained in the cylindrical skeleton 5, and lubrication retainer 4 has oil pocket, between cylindrical skeleton 5 and the lubrication retainer 4 lips outside framework oil seal 3 is housed, be placed with lubricating grease on lips outside framework oil seal 3 and the lubrication retainer 4, frictional resistance when moving with piston rod 1 with minimizing, when damping piston 6 is in original state, the end face of the end face of cylindrical skeleton 5 and damping piston 6 joins, and it is inconsistent to have solved the piston rod extrusion, and there are the problem of coupling mechanism force in working stroke instability and damping piston and high spot.
See shown in Figure 3; for avoiding when piston rod 1 is depressed into terminal; fastening piece on the piston rod 1 or link and cylinder body 8 port part produce metal bump; eliminate the destruction of cylinder body 8 port part protective layers simultaneously; be provided with concave ring groove in cylindrical skeleton 5 outer ends, the damper cap 2 that is sleeved on the piston rod 1 is fitted in the concave ring groove of cylindrical skeleton 5 ends.
Shown in Figure 4 is another kind of structure of the present utility model, different with Fig. 3 is, its piston rod 1 and damping piston 6 are the lockable structure of assembling, piston 6 is provided with radially damping hole, and by being arranged on the diameter of axle formation damping oil duct of the push rod 12 in the piston rod 1, damping piston 6 is installed on the piston rod 1, and catch 13,15 and seal ring 14,16 all are housed on damping piston 6 and the piston rod 1, forms with push rod 12 to be tightly connected dynamically.
Shown in Figure 5 is another structure of the present utility model, with Fig. 3,4 different be, cylindrical skeleton 5 is connected and composed by cylindrical shell 5-1 and cylinder base 5-2, has concave ring groove between the end of cylindrical shell 5-1 and the cylinder base 5-2, and the damper cap 2 that is sleeved on the piston rod 1 is fitted in the concave ring groove of cylindrical skeleton 5 ends.
When seeing the Balloon-Type Gas Spring work shown in Fig. 3-5, piston rod 1 is pressed in the cylinder body 8, piston rod 1 promotes damping piston 6 and moves and push fluid, part fluid is by in the preceding oil pocket of the inflow of the damping hole on the damping piston 6 and in the oil pocket of lubrication retainer 4, gas in damping piston 6 extruding fluid and the compressing gasbag 9, air bag 9 peripheral distortions change air cavity 10 volumes, and damping piston 6 reaches working stroke; After the external force on the piston rod 1 disappeared, damping piston 6 was pressed into the fluid in the preceding oil pocket 7 in the oil pocket of back by the damping hole on the damping piston 6, and the gas in the air bag 9 expands and restores, and ejects piston rod 1, made damping piston 6 move to cylindrical shell skeleton 5 end faces location.
Claims (8)
1, a kind of Balloon-Type Gas Spring, comprise cylinder body (8), be arranged on the damping piston (6) in the cylinder body (8), be connected that damping piston (6) is gone up and an end passes the damping piston-rod (1) of cylinder body (8), be arranged on outside framework oil seal (3) and skeleton (5) between cylinder body (8) and the piston rod (1), it is characterized in that: described cylinder body (8) internal fixation is equipped with air bag (9), the opening end of air bag (9) is near the rear portion of cylinder body (8), and air bag (9) is isolated oil pocket (7) in the cylinder body (8) and air cavity (10).
2, Balloon-Type Gas Spring according to claim 1 is characterized in that: described air bag (9) opening portion is fitted in the cylinder body (8) by snap ring (11).
3, Balloon-Type Gas Spring according to claim 1, it is characterized in that: the casing wall of described cylinder body (8) is isometrical, be set with cylindrical skeleton (5), lips outside framework oil seal (3) and lubrication retainer (4) on the piston rod (1) successively, cylindrical skeleton (5) is connected on the cylinder body (8), damping piston (6) is in original state, and the end face of the end face of cylindrical skeleton (5) and damping piston (6) joins.
4, Balloon-Type Gas Spring according to claim 3 is characterized in that: described cylindrical skeleton (5) is an overall structure, and the outer end is provided with concave ring groove.
5, Balloon-Type Gas Spring according to claim 3 is characterized in that: described cylindrical skeleton (5) is connected and composed by cylindrical shell (5-1) and cylinder base (5-2), has concave ring groove between the end of cylindrical shell (5-1) and the cylinder base (5-2).
6, according to claim 4 or 5 described Balloon-Type Gas Springs, it is characterized in that: the described damper cap (2) that is sleeved on the piston rod (1) is fitted in the concave ring groove of cylindrical skeleton (5) end.
7, according to one of claim 1 or 3 or 4 described Balloon-Type Gas Spring, it is characterized in that: described cylindrical skeleton (5) is made with metallic material.
8, Balloon-Type Gas Spring according to claim 3 is characterized in that: described lubrication retainer (4) is a tubular, and lubrication retainer (4) has oil pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420062504 CN2704720Y (en) | 2004-07-07 | 2004-07-07 | Gasbag air springs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420062504 CN2704720Y (en) | 2004-07-07 | 2004-07-07 | Gasbag air springs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2704720Y true CN2704720Y (en) | 2005-06-15 |
Family
ID=34777485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420062504 Expired - Fee Related CN2704720Y (en) | 2004-07-07 | 2004-07-07 | Gasbag air springs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2704720Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020034551A1 (en) * | 2018-08-14 | 2020-02-20 | 江苏睿博工业科技有限公司 | Self-locking synchronized multi-stage gas spring |
| CN113969952A (en) * | 2021-11-17 | 2022-01-25 | 长沙理工大学 | Flexible piston shock absorber for vehicle |
-
2004
- 2004-07-07 CN CN 200420062504 patent/CN2704720Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020034551A1 (en) * | 2018-08-14 | 2020-02-20 | 江苏睿博工业科技有限公司 | Self-locking synchronized multi-stage gas spring |
| CN113969952A (en) * | 2021-11-17 | 2022-01-25 | 长沙理工大学 | Flexible piston shock absorber for vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050615 |