CN105650188A - Gas spring and low-temperature-resistant piston assembly thereof - Google Patents
Gas spring and low-temperature-resistant piston assembly thereof Download PDFInfo
- Publication number
- CN105650188A CN105650188A CN201610220301.4A CN201610220301A CN105650188A CN 105650188 A CN105650188 A CN 105650188A CN 201610220301 A CN201610220301 A CN 201610220301A CN 105650188 A CN105650188 A CN 105650188A
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- China
- Prior art keywords
- piston
- sealing ring
- air spring
- piston rod
- damping
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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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
Abstract
The invention relates to the technical field of gas springs, in particular to a gas spring and a low-temperature-resistant piston assembly thereof. The gas spring comprises a piston rod, a piston and a cylinder tube, wherein the piston is arranged at one end of the piston rod and located in the cylinder tube, a seal ring of the piston is in clearance fit with the cylinder tube, and a damping structure capable of limiting radial shrinkage of the seal ring in a low-temperature environment is arranged on the piston. According to the gas spring and the low-temperature-resistant piston assembly, when the low-temperature-resistant piston assembly is in damping recovery motion, the outwards moving speed of a damping gasket is relatively higher than that of the seal ring, so that the seal ring moves towards one end, far from a first step, of the surface of a second step, and the seal ring can be stretched. Therefore, the seal ring can be limited by the damping structure even when the seal ring shrinks in the low-temperature environment, the piston assembly is prevented from being affected by gas leakage during damping recovery motion, and the working stability of the gas spring is guaranteed.
Description
Technical field
The present invention relates to gas spring technology field, particularly relate to a kind of air spring and low temperature resistant piston component thereof.
Background technology
Air spring, is a kind of using gas and liquid as the flexible member of working media, is mainly made up of the piston in cylinder barrel, cylinder barrel and piston rod and fairlead etc. In cylinder barrel, storage has gas and part fluid, occupies the volume in cylinder barrel due to piston, and during work in piston rod press-in cylinder barrel, piston makes the fluid in axially-movable extrusion chamber in cylinder barrel, and fluid compresses gas and makes piston reach operating position. After loading the disappearance of external force on the piston rod, then gas restores and expands, and the gas push fluid of expansion makes piston reset, is removed by piston rod, makes air spring realize compression and moves and restore damped motion.
Existing air spring piston assembly is as shown in Figure 1, existing piston 2 adopts split type punching press pad or Vehicle Processing pad, and form with existing piston rod 1 riveting, existing piston 2 is by three piston pad 21 riveting compositions, the external diameter of a middle piston pad is less than the external diameter of the piston pad on both sides, thus defining the groove for arranging existing sealing ring, owing to the use environment of air spring is typically in-40 DEG C to 80 DEG C, when at low ambient temperatures, owing to existing sealing ring 7 is working of plastics, it is susceptible to shrink, cause existing sealing ring 7 reduced diameter, the effect of sealing cannot be played, make to restore the impact that damped motion is leaked gas, thus affecting the stability of air spring work.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve air spring at low temperatures, restores damped motion and is susceptible to the technical problem of gas leak phenomenon, and the present invention provides a kind of air spring and low temperature resistant assembly thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of low temperature resistant piston component of air spring, including piston and piston rod, described piston is arranged on one end of piston rod, piston is set with sealing ring, described piston is provided with the damping structure of restriction sealing ring radial contraction at low ambient temperatures. When the low temperature resistant piston component of the present invention is arranged in cylinder barrel, when low temperature resistant piston component does recovery damped motion, namely piston rod outwards removes, the outside movement velocity of piston is relatively larger than the speed that sealing ring moves out so that the damping structure on piston can support large sealing packing ring, therefore, in low temperature environment, even if sealing ring shrinks, it is also possible to damped structure limits, it is ensured that the sealing between piston and cylinder barrel.
Further, specifically, described piston includes being set with damping washer on the piston rod and race lubricating pad circle, described damping washer and race lubricating pad circle set gradually from the end of piston rod to the middle part of piston rod, described damping washer is provided with stepped damping structure near the one end running lubricating pad circle, and sealing ring is arranged in stepped damping structure.
Described stepped damping structure includes first step and second step, first step is higher than second step, the side of first step fits with running lubricating pad circle, the step surface of second step is inclined-plane, set the step surface of the second step external diameter near one end of first step as d1, the step surface of second step is d2 away from the external diameter of one end of first step, the outmost turns external diameter of damping washer is d3, then d3 > d2 > d1, the internal diameter d4 of sealing ring is slightly larger than d1 and less than d2. d3 is slightly less than the external diameter of sealing ring. above-mentioned external diameter, internal diameter are the numerical value under room temperature. owing to the internal diameter d4 of sealing ring is d1 slightly larger than external diameter near one end of first step of the step surface of second step, probably enable to sealing ring under room temperature state, be sleeved on the 1/4-1/2 place of second step, when low temperature resistant piston component outwards removes, the outside movement velocity of damping washer is relatively larger than the speed that sealing ring moves out, make sealing ring to the end motion away from first step of the step surface of second step, large sealing packing ring can be supportted, therefore, even if sealing ring shrinks in low temperature environment, it also is able to the restriction of damped structure, ensure the sealing between piston and cylinder barrel.
The material of described sealing ring is politef.
Described damping washer and race lubricating pad circle are fixed on the end of piston rod by riveting mode.
Described damping washer and race lubricating pad circle are steel part material.
A kind of air spring, including cylinder barrel and piston component, described piston component is above-mentioned piston component, and the piston in described is positioned at cylinder barrel, and the sealing ring of piston coordinates with bore clearances.
The invention has the beneficial effects as follows, the air spring of the present invention and low temperature resistant piston component thereof, when low temperature resistant piston component does recovery damped motion, the outside movement velocity of damping washer is relatively larger than the speed that sealing ring moves out, make sealing ring to the end motion away from first step of the step surface of second step, large sealing packing ring can be supportted, therefore, even if sealing ring shrinks in low temperature environment, it also is able to the restriction of damped structure, piston component is avoided to do the impact leaked gas when restoring damped motion, it is ensured that the stability of air spring work.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is air spring piston modular construction schematic diagram in prior art.
Fig. 2 is the structural representation of the air spring optimum embodiment of the present invention.
Fig. 3 is the structural representation of the damping washer optimum embodiment of the present invention.
Fig. 4 is the structural representation of the sealing ring optimum embodiment of the present invention.
In figure: 1, existing piston rod, 2, existing piston, 21, piston pad, 3, sealing ring, 4, piston, 41, damping washer, 411, first step, 412, second step, 4121, the step surface of second step, 42, lubricating pad circle is run, 5, piston rod, 6, cylinder barrel, 7, existing sealing ring.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation. These accompanying drawings are the schematic diagram of simplification, and the basic structure of the present invention is only described in a schematic way, and therefore it only shows the composition relevant with the present invention.
As in Figure 2-4, a kind of air spring, including cylinder barrel 6 and piston component, piston component includes piston 4 and piston rod 5, piston 4 is arranged on one end of piston rod 5, and piston 4 is set with sealing ring 3, and the material of sealing ring 3 is politef, piston 4 is positioned at cylinder barrel 6, sealing ring 3 and cylinder barrel 6 matched in clearance of piston 4. Piston 4 is provided with the damping structure of restriction sealing ring 3 radial contraction at low ambient temperatures.
Piston 4 includes the damping washer 41 and the race lubricating pad circle 42 that are sleeved on piston rod 5, damping washer 41 and race lubricating pad circle 42 set gradually from the end of piston rod 5 to the middle part of piston rod 5, and damping washer 41 and race lubricating pad circle 42 are fixed on the end of piston rod 5 by riveting mode. Damping washer 41 is provided with stepped damping structure near the one end running lubricating pad circle 42, and sealing ring 3 is arranged in stepped damping structure.
As shown in Figure 3, stepped damping structure includes first step 411 and second step 412, first step 411 is higher than second step 412, the side of first step 411 fits with running lubricating pad circle 42, the step surface 4121 of second step is inclined-plane, set the step surface 4121 of the second step external diameter near one end of first step 411 as d1, the step surface 4121 of second step is d2 away from the external diameter of one end of first step 411, the outmost turns external diameter of damping washer 41 is d3, then d3 > d2 > d1, the internal diameter d4 of sealing ring 3 is slightly larger than d1 and less than d2.
Damping washer 41 and race lubricating pad circle 42 are steel part material.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not necessarily departing from this invention technological thought, can carry out various change and amendment completely. The technical scope of this invention is not limited to the content in description, it is necessary to determine its technical scope according to right.
Claims (7)
1. the low temperature resistant piston component of air spring, including piston (4) and piston rod (5), described piston (4) is arranged on one end of piston rod (5), piston (4) is set with sealing ring (3), it is characterised in that: described piston (4) is provided with the damping structure of restriction sealing ring (3) radial contraction at low ambient temperatures.
2. the low temperature resistant piston component of air spring as claimed in claim 1, it is characterized in that: described piston (4) includes the damping washer (41) and race lubricating pad circle (42) that are sleeved on piston rod (5), described damping washer (41) and race lubricating pad circle (42) set gradually from the end of piston rod (5) to the middle part of piston rod (5), described damping washer (41) is provided with stepped damping structure near the one end running lubricating pad circle (42), and sealing ring (3) is arranged in stepped damping structure.
3. the low temperature resistant piston component of air spring as claimed in claim 2, it is characterized in that: described stepped damping structure includes first step (411) and second step (412), first step (411) is higher than second step (412), the side of first step (411) fits with running lubricating pad circle (42), the step surface (4121) of second step is inclined-plane, set the step surface (4121) of the second step external diameter near one end of first step (411) as d1, the step surface (4121) of second step is d2 away from the external diameter of one end of first step (411), the outmost turns external diameter of damping washer (41) is d3, then d3 > d2 > d1, the internal diameter d4 of sealing ring (3) is slightly larger than d1 and less than d2.
4. the low temperature resistant piston component of air spring as claimed in claim 1, it is characterised in that: the material of described sealing ring (3) is politef.
5. the low temperature resistant piston component of air spring as claimed in claim 1, it is characterised in that: described damping washer (41) and race lubricating pad circle (42) are fixed on the end of piston rod (5) by riveting mode.
6. the low temperature resistant piston component of air spring as claimed in claim 1, it is characterised in that: described damping washer (41) and race lubricating pad circle (42) are steel part material.
7. an air spring, including cylinder barrel (6) and piston component, it is characterized in that: described piston component is the piston component as according to any one of claim 1-6, piston (4) in described is positioned at cylinder barrel (6), the sealing ring (3) of piston (4) and cylinder barrel (6) matched in clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220301.4A CN105650188A (en) | 2016-04-11 | 2016-04-11 | Gas spring and low-temperature-resistant piston assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610220301.4A CN105650188A (en) | 2016-04-11 | 2016-04-11 | Gas spring and low-temperature-resistant piston assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105650188A true CN105650188A (en) | 2016-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610220301.4A Pending CN105650188A (en) | 2016-04-11 | 2016-04-11 | Gas spring and low-temperature-resistant piston assembly thereof |
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| Country | Link |
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| CN (1) | CN105650188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113303551A (en) * | 2021-06-17 | 2021-08-27 | 广西宁站体育科技有限公司 | Preparation method of shoe material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3224378A (en) * | 1964-01-09 | 1965-12-21 | George C Graham | Fluid pressure piston seal and valve |
| FR1504777A (en) * | 1966-10-27 | 1967-12-08 | Braking device of a piston in a cylinder | |
| CN2097323U (en) * | 1991-06-22 | 1992-02-26 | 朱孝文 | Inflator piston |
| CN201071896Y (en) * | 2007-07-20 | 2008-06-11 | 隆昌山川减振器工业有限公司 | Air spring piston |
| CN103352896A (en) * | 2013-07-16 | 2013-10-16 | 安吉宏峰气弹簧科技有限公司 | Telescopic structure unit and telescopic rod composed of same |
| CN103775552A (en) * | 2012-10-22 | 2014-05-07 | 安吉宏峰气弹簧有限公司 | Compressed type gas spring capable of achieving stopping at will |
| CN203685962U (en) * | 2014-01-09 | 2014-07-02 | 厦门泰卓工贸有限公司 | Novel air spring |
| CN205479092U (en) * | 2016-04-11 | 2016-08-17 | 常州气弹簧有限公司 | Air spring and low temperature resistant piston assembly thereof |
-
2016
- 2016-04-11 CN CN201610220301.4A patent/CN105650188A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3224378A (en) * | 1964-01-09 | 1965-12-21 | George C Graham | Fluid pressure piston seal and valve |
| FR1504777A (en) * | 1966-10-27 | 1967-12-08 | Braking device of a piston in a cylinder | |
| CN2097323U (en) * | 1991-06-22 | 1992-02-26 | 朱孝文 | Inflator piston |
| CN201071896Y (en) * | 2007-07-20 | 2008-06-11 | 隆昌山川减振器工业有限公司 | Air spring piston |
| CN103775552A (en) * | 2012-10-22 | 2014-05-07 | 安吉宏峰气弹簧有限公司 | Compressed type gas spring capable of achieving stopping at will |
| CN103352896A (en) * | 2013-07-16 | 2013-10-16 | 安吉宏峰气弹簧科技有限公司 | Telescopic structure unit and telescopic rod composed of same |
| CN203685962U (en) * | 2014-01-09 | 2014-07-02 | 厦门泰卓工贸有限公司 | Novel air spring |
| CN205479092U (en) * | 2016-04-11 | 2016-08-17 | 常州气弹簧有限公司 | Air spring and low temperature resistant piston assembly thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113303551A (en) * | 2021-06-17 | 2021-08-27 | 广西宁站体育科技有限公司 | Preparation method of shoe material |
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Application publication date: 20160608 |