CN202118168U - Compression air spring - Google Patents
Compression air spring Download PDFInfo
- Publication number
- CN202118168U CN202118168U CN2011201678381U CN201120167838U CN202118168U CN 202118168 U CN202118168 U CN 202118168U CN 2011201678381 U CN2011201678381 U CN 2011201678381U CN 201120167838 U CN201120167838 U CN 201120167838U CN 202118168 U CN202118168 U CN 202118168U
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- China
- Prior art keywords
- piston
- groove
- diameter section
- cylinder barrel
- ring
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- Expired - Fee Related
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Abstract
A compression air spring relates to the field of springs, shock absorbers and damping devices, in particular to an air spring structure. The compression air spring comprises a cylinder barrel, a piston rod is penetratingly arranged in the cylinder barrel, a first groove is radially arranged on the outside of the rear end of the piston rod, a front retainer ring and a piston are sleeved on the outside of the piston rod in the first groove, at least two second grooves are arranged on the outside of the front retainer ring, the piston comprises a small-diameter section and a large-diameter section which are arranged integrally, a third groove and a fourth groove are arranged on the outside of the small-diameter section of the piston and are respectively communicated with the corresponding second grooves, an orifice which is communicated with the third groove is arranged on the large-diameter section of the piston, a fifth groove which is communicated with the orifice is arranged at the rear end of the large-diameter section of the piston, and a rectangular ring which is made of polytetrafluoroethylene is disposed between the front retainer ring and the large-diameter section of the piston, is slidably sleeved on the outside of the small-diameter section of the piston and is fittingly arranged in the cylinder barrel. Dynamic force value of the compression air spring in compression and expansion processes is stable.
Description
Technical field
The utility model relates to the field of a kind of spring, vibration damper, damping device, particularly the structure of air spring.
Background technique
Air spring is a kind ofly can play support, buffering, braking, highly regulate and the accessory of function such as angle adjustment, is widely used in fields such as medical equipment, automobile, furniture, Weaving device, machine-building.Principle is in airtight cylinder barrel, to charge into inert gas or gas mixture; Make the pressure in the cavity be higher than atmospheric several times or tens times, thereby the pressure difference that the cross-section area that utilizes piston rod produces less than the cross-section area of piston realize the motion of piston rod.At present; Compression-type air spring piston seal adopts O shape circle with guiding; Under the pressurized gas effect that in use charges in the air spring cylinder barrel, O shape circle can produce distortion in various degree, in the dynamic process inner wall of cylinder is produced the side pressure that fluctuates; Lead variations of beating of system friction, so lead neutralize that the miniature air spring compresses and stretching process in the beating of dynamic force value.There is defective, influences quality of product.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of existing technology, a kind of compression-type air spring of the dynamic force value stabilization in compression and stretching process to be provided.
The purpose of the utility model is achieved in that the compression-type air spring, comprises cylinder barrel, places piston rod in the cylinder barrel; The front end of piston rod is arranged on outside the cylinder barrel, and the rear end of piston rod is arranged in the cylinder barrel, and the rear end outer radial of piston rod is provided with first groove; Piston rod in first groove is nested with front circle, piston and back back-up ring outward, the rear side of back-up ring before piston is arranged on, and back back-up ring is arranged on the rear side of piston; The back-up ring peripheral hardware is put at least two second grooves before said; Said piston comprises reduced diameter section and the enlarged diameter section that disjunctor is provided with, and the reduced diameter section of piston is arranged on the front side of enlarged diameter section, and the reduced diameter section of piston is provided with the 3rd groove and the 4th groove outward; The 3rd groove and the 4th groove are connected with corresponding second groove respectively; The external diameter of the enlarged diameter section of piston is provided with a throttle orifice that is connected with the 3rd groove less than the internal diameter of cylinder barrel on the enlarged diameter section of piston, the rear end of the enlarged diameter section of piston is provided with the 5th groove that is connected with throttle orifice; The external diameter of said back back-up ring is less than the internal diameter of cylinder barrel; The rectangular ring of being processed by teflon is set between the enlarged diameter section of back-up ring and piston before said, and rectangular ring is slideable to be nested with outside the reduced diameter section of piston, and rectangular ring is equipped with in said cylinder barrel.
The utility model is through above design; When piston rod stretches; Rectangular ring moves to the enlarged diameter section of piston, and gas can get into second groove → the 3rd groove → throttle orifice → the 5th groove from rod chamber, gets into rodless cavity from the gap between cylinder barrel and the back back-up ring again; This moment, the runner of the 4th groove was obstructed, had the effect of throttling buffering.During the piston rod compression; Rectangular ring back-up ring forward moves, and gas gets into the gap between cylinder barrel and the back back-up ring from rodless cavity, gets into the 5th groove → throttle orifice → the 3rd groove → second groove; Gas is got between enlarged diameter section and the rectangular ring by the enlarged diameter section and the gap between the cylinder barrel of piston simultaneously; Get into the 4th groove → second groove again, get into rod chamber again, have the effect of incremental drag reduction.This structure can not only be improved compression-type air spring compression and stretch dynamic force value in the working procedure not stationarity of beating, and can improve the quality and the working life of product effectively than adopting O shape coil structures have better guiding accuracy and wear resistance.
Description of drawings
Fig. 1 is the structural representation of the utility model at stretching process.
Fig. 2 is the structural representation of the utility model in compression process.
Among the figure, 1 piston rod, 2 cylinder barrels, 3 preceding back-up rings, 4 second grooves, 5 rectangular rings, 6 the 3rd grooves, 7 throttle orifices, 8 the 5th grooves, 9 pistons, 9-1 reduced diameter section, 9-2 enlarged diameter section, 10 back back-up rings, 11 the 4th grooves, 12 first grooves.
Embodiment
Like Fig. 1, shown in 2, be the compression-type air spring, comprise cylinder barrel 2; Place piston rod 1 in the cylinder barrel 2, the front end of piston rod 1 is arranged on outside the cylinder barrel 2, and the rear end of piston rod 1 is arranged in the cylinder barrel 2; The rear end outer radial of piston rod 1 is provided with first groove 12; Piston rod 1 outer front circle 3, piston 9 and the back back-up ring 10 of being nested with in first groove 12, the rear side of back-up ring 3 before piston 9 is arranged on, back back-up ring 10 is arranged on the rear side of piston 9.
At least two second grooves 4 of preceding back-up ring 3 outer settings; Piston 9 comprises reduced diameter section 9-1 and the enlarged diameter section 9-2 that disjunctor is provided with; The reduced diameter section 9-1 of piston 9 is arranged on the front side of enlarged diameter section 9-2; The reduced diameter section 9-1 of piston 9 is provided with the 3rd groove 6 and the 4th groove 11, the three grooves 6 and the 4th groove 11 outward and is connected with corresponding second groove 4 respectively, and the external diameter of the enlarged diameter section 9-2 of piston 9 is less than the internal diameter of cylinder barrel 2; A throttle orifice 7 that is connected with the 3rd groove 6 is set on the enlarged diameter section 9-2 of piston 9; The rear end of the enlarged diameter section 9-2 of piston 9 is provided with the 5th groove 8 that is connected with throttle orifice 7, and the rectangular ring of being processed by teflon 5, rectangular ring 5 slideable being nested with outside the reduced diameter section 9-1 of piston 9 are set between the enlarged diameter section 9-2 of preceding back-up ring 3 and piston 9; Rectangular ring 5 is equipped with in cylinder barrel 2, and the external diameter of back back-up ring 10 is less than the internal diameter of cylinder barrel 2.
Claims (1)
1. the compression-type air spring comprises cylinder barrel, places piston rod in the cylinder barrel; The front end of piston rod is arranged on outside the cylinder barrel, and the rear end of piston rod is arranged in the cylinder barrel, and the rear end outer radial of piston rod is provided with first groove; Piston rod in first groove is nested with front circle, piston and back back-up ring outward, the rear side of back-up ring before piston is arranged on, and back back-up ring is arranged on the rear side of piston; The back-up ring peripheral hardware is put at least two second grooves before said; Said piston comprises reduced diameter section and the enlarged diameter section that disjunctor is provided with, and the reduced diameter section of piston is arranged on the front side of enlarged diameter section, and the reduced diameter section of piston is provided with the 3rd groove and the 4th groove outward; The 3rd groove and the 4th groove are connected with corresponding second groove respectively; The external diameter of the enlarged diameter section of piston is provided with a throttle orifice that is connected with the 3rd groove less than the internal diameter of cylinder barrel on the enlarged diameter section of piston, the rear end of the enlarged diameter section of piston is provided with the 5th groove that is connected with throttle orifice; The external diameter of said back back-up ring is less than the internal diameter of cylinder barrel; It is characterized in that: the rectangular ring of being processed by teflon is set between the enlarged diameter section of back-up ring and piston before said, and rectangular ring is slideable to be nested with outside the reduced diameter section of piston, and rectangular ring is equipped with in said cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201678381U CN202118168U (en) | 2011-05-24 | 2011-05-24 | Compression air spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201678381U CN202118168U (en) | 2011-05-24 | 2011-05-24 | Compression air spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202118168U true CN202118168U (en) | 2012-01-18 |
Family
ID=45459235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201678381U Expired - Fee Related CN202118168U (en) | 2011-05-24 | 2011-05-24 | Compression air spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202118168U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606663A (en) * | 2012-03-21 | 2012-07-25 | 江苏大学 | Additional air chamber of volume-variable air spring |
-
2011
- 2011-05-24 CN CN2011201678381U patent/CN202118168U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606663A (en) * | 2012-03-21 | 2012-07-25 | 江苏大学 | Additional air chamber of volume-variable air spring |
| CN102606663B (en) * | 2012-03-21 | 2014-02-12 | 江苏大学 | Additional air chamber of volume-variable air spring |
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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: 20120118 Termination date: 20140524 |