CN101858400A - Dynamic sealing compound guide bushing of seat air pressure rod - Google Patents
Dynamic sealing compound guide bushing of seat air pressure rod Download PDFInfo
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- CN101858400A CN101858400A CN201010112435A CN201010112435A CN101858400A CN 101858400 A CN101858400 A CN 101858400A CN 201010112435 A CN201010112435 A CN 201010112435A CN 201010112435 A CN201010112435 A CN 201010112435A CN 101858400 A CN101858400 A CN 101858400A
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Abstract
The invention relates to a dynamic sealing compound guide bushing of a seat air pressure rod (also known as a controllable gas spring). The dynamic sealing compound guide bushing mainly comprises a ventilation pressing ring which has an air pressure self-compensation sealing function, and an inner splined hole compound guide bushing body of which ends are wrapped with metal bearing washers in injection molding. The pressing ring, the guide bushing body and each closed ring die-shaped groove corresponding to the guide bushing body together form a closed space, so that an internal sealing lip and an outer sealing lip of a rubber sealing ring of the dynamic sealing compound guide bushing can be formed, and the pressing ring, the sealing ring and the guide bushing body can be formed into a composite structure body at the same time by adopting plastic injection once. No burrs, fins and flash caused by die seams exist on each sealing coupling surface of the sealing ring formed in the process of plastic injecting and compounding. The compound body of the structure has the following characteristics that: the assembling processes are reduced, the safety and the air tightness of the dynamic sealing compound guide bushing are improved, the charged pressure can directly determine the result of lifting force of the dynamic sealing compound guide bushing, the charging guide can be realized in the same end hole, 'Four Modernizations' of products are convenient to realize, and the combined cost can be reduced on an original basis.
Description
A kind of seat air pressure rod involved in the present invention (claims again: dynamic sealing compound guide bushing controlled air spring).
At present, its basic feature of seat air pressure rod product is: gas medium is the high pressure of (be meant and be stored in intrinsic limited gas) [this fills difference that nitrogen pressure requires with its " lifting force " and different, and its air pressure often will reach more than 4 (MPa)] container quantitatively.Therefore, this security of products and its tightness are its primary indexs.This production industry (strictness says that this product should belong to high-pressure bottle) generally adopts at this position: breathe freely trim ring, special-shaped bone pad rubber seal, plastics outer end carrier ring of plastics is respectively charged into its " outer tube " back rigidity and pushes and charge into high pressure nitrogen again after " closing in " combines.Its inner rim and its piston rod outer axial face constitute its motive sealing to the outer rim of its special-shaped bone pad rubber seal with " outer tube " endoporus wall formation static seal.Have the following disadvantages and defective in existing structure and assembling thereof, the using process:
One, the assembling sequence of this structure is: ventilative trim ring → rubber seal → outer end carrier ring → " closing in ".So this 4 step of process need operation just can be finished.
Its two, the aperture of ventilative trim ring and its seal ring contact jaw is too small to be compacted interior sealing (motive sealing position) lip of its seal ring after must causing making up, thereby loses its air pressure self compensation sealing function.
Its three, special-shaped rubber seal endoporus motive sealing lip is too thick, only deposits its rubber elasticity after its assembled compacting.This must cause it: poor sealing performance, air pressure self compensation (being compressed the effect of gas) defunctionalization, effectively short and surface friction drag sealing life many bad results' such as uncertain generation.This uncertainty must cause in very large range different of its " lifting force " performance again.It is should " bone pad " sealing structure circle " paddy portion " too thin again, very easily causes its " paddy portion " cracking under the acting in conjunction of flexible and its surface friction drag of piston rod.
Its four, when the gap that is slidingly matched of the pilot hole of plastics outer end carrier ring and its piston rod meets its guiding and requires (referring to design handbook), can't charge into working gas smoothly at this position because its gap is too small; If it increases gap when meeting its inflation and requiring, this position loses its slide-and-guide function again.This just present the sector exists two kinds of working gass and charges into the former therefore place of mode.
Its five, the final assembling procedure of seat air pressure rod is to be out of shape the rigidity extruding " closings in " of packing into one by one behind its " outer tube " endoporus of whole component fastening.The contact zones of " closing in " inner edge of the external end edge of plastics outer end carrier ring and its " outer tube " constitute unique carrying band of this member.After charging into working gas, the contact stress of these contact zones (increasing along with the rising of this inflation pressure) has exceeded the limit (one of inducement of the possible explosion of this structure pressure rod) that non-metallic member can ensure.Again it, this carrier ring material (as: " phenolic aldehyde " plastics that toughness is relatively poor) is improperly selected and the operational deficiencies during " closings in " assembling can cause this circle to be extruded cracking, this can become another inducement of the possible explosion of pressure rod again.
In sum, concerning a production in enormous quantities, seat air pressure rod (belonging to the quantitative high-pressure bottle of the working medium) industry used, be badly in need of standard a kind of safe to use, sealability reliable, the compound substantially existing structure of profile, produce dynamic sealing compound guide bushing of seat air pressure rod simple, easy to assembly, with low cost.
Purpose of the present invention, exist in order to overcome existing seat air pressure rod sealing guiding position: assembly process is many, the endoporus of ventilative trim ring and end-face structure its automatic compensating motive sealing condition that do not match, the motive sealing position of seal ring does not possess perfect self compensation function, its " lifting force " performance uncertainty in very large range under certain inflation pressure, the endoporus of plastics outer end carrier ring can not be taken into account the dual functions of its guiding and inflation simultaneously, the external end edge contact stress (increasing) of its carrier ring along with the rising of its inflation pressure too high and the assembling not at that time easily by defectives such as squeeze cracks.
Above-mentioned purpose of the present invention is realized by following technological scheme.
A kind of dynamic sealing compound guide bushing of seat air pressure rod, it mainly comprises ventilative trim ring, composite sealing ring and compound guide bushing body; It is characterized in that: after ventilative trim ring and compound guide bushing body adopted the engineering plastics injection molded respectively, again it being bonded to each other when the injecting glue of realization composite sealing ring is shaped in the injecting glue mould of again it being packed into simultaneously constituted a complex structure body, wherein is somebody's turn to do:
Ventilative trim ring, its endoporus should be more than or equal to sealing lip roots in the composite sealing ring, and are provided with protruding core and ventilating groove at its other end;
The compound guide bushing body, being wrapped together with metal carrying packing ring during its injection molded is a compound body; The spline internal orifice dimension of the guiding inflation splined hole in the compound guide bushing body realizes that its aerification function can be satisfied in the outer aperture of its spline with the slide-and-guide function of its piston rod;
Composite sealing ring, ventilative trim ring, the common formation of each closed loop mould-shaped slots one enclosed space that the compound guide bushing body is corresponding with it; At its gum-injecting port place, adopt injecting glue can realize that just the interior sealing lip of its rubber seal and labioplastic while of external sealed can constitute its three one complex structure body again, treat to utilize behind the rubber cooling shaping its compressibility can be easily with its demoulding; There is not any burr, overlap and flash that is caused because of the mould seam in respectively sealing of formed composite sealing ring on the coupled face in this injecting glue recombination process.
Usefulness of the present invention is:
Reduce its assembly process; The epipharynx of composite sealing ring has perfect air pressure self compensation sealing function; Its surface friction drag is only relevant with the size of its inflation pressure, and the size of its inflation pressure depends on the requirement of its lifting force; Splined hole in the compound guide bushing body has guiding and aerification function simultaneously; And the setting of its metal carrying packing ring can be avoided the concentrations of the plastic member contact stress that causes after its " closings in ", " inflation " and ftracture bring out the generation of bursting accident.
For technological scheme of the present invention being easier to understand, described in detail below in conjunction with accompanying drawing:
Description of drawings:
Fig. 1 vertical section structure figure of the present invention and side view thereof.
As shown in Figure 1, a kind of dynamic sealing compound guide bushing of seat air pressure rod of the present invention its mainly comprise: sealing lip root (4), seal ring outer seal lip (5), seal ring gum-injecting port (6), compound guide bushing body (7), metal carrying packing ring (8), guiding inflation splined hole (9), spline internal orifice dimension (10), the outer aperture (11) of spline, ventilating groove (12), composite sealing ring (13) member of etc.ing and feature composition in sealing lip (3), the seal ring in ventilative trim ring endoporus (1), ventilative trim ring (2), the seal ring.
A kind of dynamic sealing compound guide bushing of seat air pressure rod of the present invention, it mainly comprises ventilative trim ring (2), composite sealing ring (13) and compound guide bushing body (7); It is characterized in that: after ventilative trim ring (2) and compound guide bushing body (7) adopt the engineering plastics injection molded respectively, it being packed into simultaneously is bonded to each other it again when the injecting glue of realizing composite sealing ring (13) in the injecting glue mould is shaped again constitutes a complex structure body, wherein should:
Ventilative trim ring (2), its endoporus (1) should be more than or equal to the interior sealing lip roots of composite sealing ring (13) (4), and are provided with protruding core and ventilating groove (12) at its other end;
Compound guide bushing body (7), carrying together with metal that packing ring (8) is wrapped during its injection molded is a compound body; The spline internal orifice dimension (10) of the guiding inflation splined hole (9) of compound guide bushing body (7) realizes that its aerification function can be satisfied in the outer aperture (11) of its spline with the slide-and-guide function of its piston rod;
Composite sealing ring (13), ventilative trim ring (2), the common formation of each closed loop mould-shaped slots one enclosed space that compound guide bushing body (7) is corresponding with it; Locate at its gum-injecting port (6), adopt injecting glue just can realize its three (2,7,13) can being constituted a complex structure body again when the interior sealing lip (3) of its rubber seal and outer seal lip (5) are shaped, treat to utilize behind the rubber cooling shaping its compressibility can be easily with its demoulding.There is not any burr, overlap and flash that is caused because of the mould seam in respectively sealing of formed composite sealing ring on the coupled face in this injecting glue recombination process.
Claims (1)
1. dynamic sealing compound guide bushing of seat air pressure rod, it mainly comprises ventilative trim ring, composite sealing ring and compound guide bushing body; It is characterized in that: after ventilative trim ring and compound guide bushing body adopted the engineering plastics injection molded respectively, again it being bonded to each other when the injecting glue of realization composite sealing ring is shaped in the injecting glue mould of again it being packed into simultaneously constituted a complex structure body, wherein is somebody's turn to do:
Ventilative trim ring, its endoporus should be more than or equal to sealing lip roots in the composite sealing ring, and are provided with protruding core and ventilating groove at its other end;
The compound guide bushing body, being wrapped together with metal carrying packing ring during its injection molded is a compound body; The spline internal orifice dimension of the guiding inflation splined hole in the compound guide bushing body realizes that its aerification function can be satisfied in the outer aperture of its spline with the slide-and-guide function of its piston rod;
Composite sealing ring, ventilative trim ring, the common formation of each closed loop mould-shaped slots one enclosed space that the compound guide bushing body is corresponding with it; At its gum-injecting port place, adopt injecting glue can realize that just the interior sealing lip of its rubber seal and labioplastic while of external sealed can constitute its three one complex structure body again, treat to utilize behind the rubber cooling shaping its compressibility can be easily with its demoulding; There is not any burr, overlap and flash that is caused because of the mould seam in respectively sealing of formed composite sealing ring on the coupled face in this injecting glue recombination process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101124357A CN101858400B (en) | 2010-02-23 | 2010-02-23 | Dynamic sealing compound guide bushing of seat air pressure rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101124357A CN101858400B (en) | 2010-02-23 | 2010-02-23 | Dynamic sealing compound guide bushing of seat air pressure rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101858400A true CN101858400A (en) | 2010-10-13 |
| CN101858400B CN101858400B (en) | 2011-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101124357A Expired - Fee Related CN101858400B (en) | 2010-02-23 | 2010-02-23 | Dynamic sealing compound guide bushing of seat air pressure rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727160A (en) * | 2013-12-13 | 2014-04-16 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Air dynamic pressure bearing damping device |
| CN108291603A (en) * | 2015-08-17 | 2018-07-17 | 泰特（德卡尼）公司 | Damper improves |
| CN110403382A (en) * | 2019-08-22 | 2019-11-05 | 常州市莱特气弹簧有限公司 | The air pressure rod quickly assembled and disassembled with chair lift supporting mechanism |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2410926Y (en) * | 2000-02-01 | 2000-12-20 | 黄明华 | Improved pneumatic expansion link unit for pneumatic chair |
| CN2605781Y (en) * | 2003-03-12 | 2004-03-10 | 张若坤 | Front controllable pneumatic lever assemblage of chair |
| CN201388758Y (en) * | 2009-03-17 | 2010-01-27 | 福隆尖端科技股份有限公司 | Atmospheric pressure rod |
-
2010
- 2010-02-23 CN CN2010101124357A patent/CN101858400B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727160A (en) * | 2013-12-13 | 2014-04-16 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Air dynamic pressure bearing damping device |
| CN103727160B (en) * | 2013-12-13 | 2015-09-16 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of air hydrodynamic bearing damping device |
| CN108291603A (en) * | 2015-08-17 | 2018-07-17 | 泰特（德卡尼）公司 | Damper improves |
| CN110403382A (en) * | 2019-08-22 | 2019-11-05 | 常州市莱特气弹簧有限公司 | The air pressure rod quickly assembled and disassembled with chair lift supporting mechanism |
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| Publication number | Publication date |
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| CN101858400B (en) | 2011-10-26 |
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