CN205479092U - Air spring and low temperature resistant piston assembly thereof - Google Patents
Air spring and low temperature resistant piston assembly thereof Download PDFInfo
- Publication number
- CN205479092U CN205479092U CN201620294720.8U CN201620294720U CN205479092U CN 205479092 U CN205479092 U CN 205479092U CN 201620294720 U CN201620294720 U CN 201620294720U CN 205479092 U CN205479092 U CN 205479092U
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- piston
- air spring
- low temperature
- temperature resistant
- sealing ring
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Abstract
The utility model relates to an air spring technical field especially relates to an air spring and low temperature resistant piston assembly thereof, and wherein, the air spring has piston rod, piston and a cylinder, and the piston setting is in the one end of piston rod, and the piston is located the cylinder, and the sealing washer and the cylinder clearance fit of piston are provided with the damping structure that can restrict sealing washer radial shrinkage under low temperature environment on. The utility model discloses an air spring and low temperature resistant piston assembly thereof, under low temperature resistant piston assembly does the condition of recoveing the damped motion, the outside velocity of movement of damping packing ring is greater than the speed of the outside motion of sealing washer relatively, make the sealing washer to keep away from an end motion of first step to the step face of second step, can prop big sealing washer, therefore, even the shrink takes place for the sealing washer in low temperature environment, also can be restricted by damping structure, avoid piston assembly to do the influence that receives gas leakage when recoveing the damped motion, guarantee air spring job stabilization nature.
Description
Technical field
The utility model relates to gas spring technology field, particularly relates 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 makees the fluid in axially-movable extrusion chamber in cylinder barrel, and fluid compressed gas 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 uses split type punching press pad or Vehicle Processing pad, and form with existing piston rod 1 riveting, existing piston 2 consists of three piston pad 21 rivetings, the external diameter of a middle piston pad is less than the external diameter of the piston pad on both sides, thus define the groove for arranging existing sealing ring, owing to the use environment of air spring is typically at-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 damped motion to be affected by leaking gas, thus affect the stability of air spring work.
Utility model content
The technical problems to be solved in the utility model 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 utility model provides a kind of air spring and low temperature resistant assembly thereof.
The utility model solves its technical problem and be the technical scheme is that 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, it is set with sealing ring on piston, described piston is provided with limit the damping structure of sealing ring radial contraction at low ambient temperatures.When low temperature resistant piston component of the present utility model is arranged in cylinder barrel, in the case of low temperature resistant piston component does recovery damped motion, i.e. piston rod outwards removes, the speed that the outside movement velocity of piston moves out relatively larger than sealing ring 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 the damping washer being set with on the piston rod and runs lubricating pad circle, described damping washer and race lubricating pad circle set gradually to the middle part of piston rod from the end 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, setting the step surface of the second step external diameter near one end of first step is d2 as d1, the step surface of second step away from the external diameter of one end of first step, and the outmost turns external diameter of damping washer is d3, then d3 ＞ d2 ＞ d1, the internal diameter d4 of sealing ring are 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 normal temperature.It is d1 owing to the internal diameter d4 of sealing ring is slightly larger than the step surface of the second step external diameter near one end of first step, probably enable to sealing ring and be sleeved at the 1/4-1/2 of second step under normal temperature state, when low temperature resistant piston component outwards removes, the speed that the outside movement velocity of damping washer moves out relatively larger than sealing ring, make sealing ring to the step surface of second step away from an end motion of first step, large sealing packing ring can be supportted, therefore, even if sealing ring shrinks in low temperature environment, it also is able to damped structure limit, ensure the sealing between piston and cylinder barrel.
The material of described sealing ring is polytetrafluoroethylene (PTFE).
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 piston component is positioned at cylinder barrel, and the sealing ring of piston coordinates with bore clearances.
The beneficial effects of the utility model are, air spring of the present utility model and low temperature resistant piston component thereof, in the case of low temperature resistant piston component does recovery damped motion, the speed that the outside movement velocity of damping washer moves out relatively larger than sealing ring, make sealing ring to the step surface of second step away from an end motion of first step, large sealing packing ring can be supportted, therefore, even if sealing ring shrinks in low temperature environment, it also is able to damped structure limit, piston component is avoided to be affected by leaking gas when doing recovery damped motion, it is ensured that the stability of air spring work.
Accompanying drawing explanation
With embodiment, the utility model is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is air spring piston modular construction schematic diagram in prior art.
Fig. 2 is the structural representation of air spring optimum embodiment of the present utility model.
Fig. 3 is the structural representation of damping washer optimum embodiment of the present utility model.
Fig. 4 is the structural representation of sealing ring optimum embodiment of the present utility model.
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
Presently in connection with accompanying drawing, the utility model is described in further detail.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is described the most in a schematic way, and therefore it only shows the composition relevant with the utility model.
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 polytetrafluoroethylene (PTFE), piston 4 is positioned at cylinder barrel 6, sealing ring 3 and cylinder barrel 6 matched in clearance of piston 4.It is provided with limiting the damping structure of sealing ring 3 radial contraction at low ambient temperatures on piston 4.
Piston 4 includes the damping washer 41 being sleeved on piston rod 5 and runs lubricating pad circle 42, 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 are slightly larger than d1 and less than d2.
Damping washer 41 and race lubricating pad circle 42 are steel part material.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the range of without departing from this utility model technological thought.The content that the technical scope of this utility model is not limited on specification, 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), sealing ring (3) it is set with on piston (4), it is characterised in that: it is provided with limiting the damping structure of sealing ring (3) radial contraction at low ambient temperatures on described piston (4).
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) being sleeved on piston rod (5) and runs lubricating pad circle (42), 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 polytetrafluoroethylene (PTFE).
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 piston component 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 |
|---|---|---|---|
| CN201620294720.8U CN205479092U (en) | 2016-04-11 | 2016-04-11 | Air spring and low temperature resistant piston assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620294720.8U CN205479092U (en) | 2016-04-11 | 2016-04-11 | Air spring and low temperature resistant piston assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205479092U true CN205479092U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620294720.8U Expired - Fee Related CN205479092U (en) | 2016-04-11 | 2016-04-11 | Air spring and low temperature resistant piston assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205479092U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650188A (en) * | 2016-04-11 | 2016-06-08 | 常州气弹簧有限公司 | Gas spring and low-temperature-resistant piston assembly thereof |
-
2016
- 2016-04-11 CN CN201620294720.8U patent/CN205479092U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650188A (en) * | 2016-04-11 | 2016-06-08 | 常州气弹簧有限公司 | Gas spring and low-temperature-resistant piston assembly thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 |