CN100510461C - Check valve structure of hydraulic dumper - Google Patents
Check valve structure of hydraulic dumper Download PDFInfo
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- CN100510461C CN100510461C CNB2007101404394A CN200710140439A CN100510461C CN 100510461 C CN100510461 C CN 100510461C CN B2007101404394 A CNB2007101404394 A CN B2007101404394A CN 200710140439 A CN200710140439 A CN 200710140439A CN 100510461 C CN100510461 C CN 100510461C
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Abstract
There is provided a hydraulic dumper including an receiving space 15 formed between the rod guide 4 of the cylinder 1 and the insert metal 5 and for temporarily retaining the working fluid leaked out from the oil chamber R 1 through the sliding gap of the rod 3 , a communicating path 4 d for communicating the reservoir R and the receiving space 15 , and a check valve 9 for allowing the flow of the working fluid only from the receiving space 15 to the reservoir R, wherein, either one of the lip part 9 a of the check valve or the seat surface 4 c provided on the rod guide 4 is formed with a sealing projected part 10, 11 protruding from the mutual contact surface.
Description
Technical field
The present invention relates to a kind of hydraulic buffer, be specifically related to the one-way valve of hydraulic buffer.
Background technique
Usually, have the bar guide member in the multi-barrel hydraulic buffer, this bar guide member stops up the opening end of the urceolus of the opening end of oil hydraulic cylinder and covering liquid cylinder pressure respectively, and is supporting the bar that is inserted into the interior free sliding of oil hydraulic cylinder with axle.In addition, be laminated with the clamp bar of ring-type on the top of this bar guide member, have sealing component respectively, thereby keep the oily close of hydraulic buffer in the inner periphery and the outer periphery of this clamp bar.
In detail, clamp bar has the annular seal that connects in interior week with above-mentioned urceolus at its outer circumferential side, and in addition, all within it sides have grease proofing lip and the dust excluder lips with the periphery sliding contact of above-mentioned bar, between bar separately and the urceolus by the clamp bar oil tight seal.
And, in such multi-barrel hydraulic buffer, glade plane space between above-mentioned bar and the above-mentioned bar guide member is not in the state that is sealed fully, therefore, though each amount is few, still can flow in the space between bar guide member and the clamp bar by above-mentioned gap from the working oil of the grease chamber in the oil hydraulic cylinder.Owing to this working oil is turned back in the interior reservoir of hydraulic buffer, therefore, in the bar guide member, be provided with the intercommunicating pore that above-mentioned space is connected with above-mentioned reservoir.
But, for prevent gas in the reservoir via this intercommunicating pore adverse current in above-mentioned space, and further by in the grease chamber of above-mentioned gap adverse current in the oil hydraulic cylinder, according to TOHKEMY 2000-343633A, provide a kind of have only allow that working oil is from the scheme of above-mentioned spatial flow to the one-way valve of reservoir.
This one-way valve makes the front end boss clan position of spool of ring-type on the lower surface that is located at clamp bar, that form with rubber on the seat surface of bar guide member, by stoping being communicated with between above-mentioned intercommunicating pore and the space to prevent gas flow, on the other hand, when the pressure of the oil in riddling above-mentioned space raises, this space is connected with reservoir, thereby working oil is turned back in the reservoir from the space.
In addition, the expanding-contracting action of the on-off action of this one-way valve and hydraulic buffer carries out synchronously.This be because, grease chamber's pressure of hydraulic buffer is to change along with moving of piston, in the stroke of the above-mentioned grease chamber of compression, working oil is released in above-mentioned space by above-mentioned gap, and the cause that the pressure in space is risen.
But, above-mentioned one-way valve is because the lip part of its front end is close on the seat surface of above-mentioned bar guide member with bigger area, add the capillary effect that is subjected to oil film and be difficult to surface isolation from the bar guide member, the pressure of the oil in the above-mentioned space does not rise to a certain degree one-way valve and can not open, and therefore the pressure in the above-mentioned space is easy to rise to more than the required pressure (more than the setting pressure).
If the pressure in the above-mentioned space raises, then can produce such problem: will be configured in the compressing power that the above-mentioned oil seal of interior all sides of clamp bar is pressed on the bar and unnecessarily raise, therefore the slip resistance of bar becomes big, the smoothness that hinders the expanding-contracting action of hydraulic buffer.
Summary of the invention
The object of the present invention is to provide a kind of can be by the rising of oil pressure in the above-mentioned space and the one-way valve of opening rapidly.
In order to achieve the above object, the present invention has oil hydraulic cylinder in hydraulic buffer, urceolus, the grease chamber, reservoir, the bar guide member, clamp bar, bar, containing space, access and one-way valve, above-mentioned urceolus is configured in the outside of above-mentioned oil hydraulic cylinder, above-mentioned grease chamber is formed in the above-mentioned oil hydraulic cylinder, above-mentioned reservoir is formed between above-mentioned oil hydraulic cylinder and the above-mentioned urceolus, above-mentioned bar guide member is used to stop up the opening end of above-mentioned oil hydraulic cylinder and the opening end of urceolus, above-mentioned clamp bar laminated configuration is on above-mentioned bar guide member, above-mentioned bar runs through above-mentioned bar guide member and above-mentioned clamp bar in the mode of free sliding, above-mentioned containing space is formed between above-mentioned bar guide member and the above-mentioned clamp bar, above-mentionedly be used for the working oil that interim storage spills by the glade plane space of above-mentioned bar from above-mentioned grease chamber, above-mentioned access is used for above-mentioned reservoir is connected with above-mentioned containing space, above-mentioned one-way valve is configured between above-mentioned containing space and the above-mentioned access, only allow that working oil flows to reservoir from above-mentioned containing space, the lip part of above-mentioned one-way valve be located on the above-mentioned bar guide member, be formed with on the either party of the seat surface relative from the outstanding sealing jut of mutual surface of contact with above-mentioned one-way valve.
Thereby, owing to reduced area of contact one-way valve, between itself and the seat surface, therefore reduced the close property of lip part with respect to seat surface, one-way valve is risen and fast quick-opening valve with respect to the pressure of containing space, thereby be sidelong out working oil to reservoir, therefore, the pressure that can suppress in the containing space rises.
Description of drawings
Fig. 1 is the longitudinal section of head of the hydraulic buffer of expression one-way valve of the present invention.
Fig. 2 is the sectional view of amplification of the one-way valve of Fig. 1.
Fig. 3 be represent in the past one-way valve and seat surface between the explanatory drawing of contact condition.
Fig. 4 is expression one-way valve when action, and the pressure in the space is passed and the figure that changes in time.
Fig. 5 is the sectional view of another embodiment's one-way valve.
Fig. 6 is the sectional view of another embodiment's one-way valve.
Embodiment
Below, one-way valve of the present invention is described with reference to the accompanying drawings.
Fig. 1 represents to be equipped with the head of the hydraulic buffer of one-way valve of the present invention, hydraulic buffer has oil hydraulic cylinder 1 and is configured in the urceolus 2 of its foreign side coaxially with oil hydraulic cylinder 1, the clamp bar 5 that also has bar guide member 4 and ring-type, bar guide member 4 is used for the opening end of the opening end of plugging fluid cylinder pressure 1 and urceolus 2 and is supporting the bar 3 that runs through its center, and clamp bar 5 is layered in the top of this bar guide member 4.
Though it is not shown, but be inserted with the piston of the free sliding that is connected with bar 3 in the inside of oil hydraulic cylinder 1, the chamber of the outer piston side of the chamber R1 of the bar side of being filled up by working oil and figure will be divided into respectively by this piston in the oil hydraulic cylinder 1, and, between oil hydraulic cylinder 1 and urceolus 2, be formed with the reservoir R that is used for blanketing gas and working oil.In addition, reservoir R is connected with the chamber of not shown above-mentioned piston side in oil hydraulic cylinder bottom, and working oil is circulated.
Above-mentioned bar guide member 4 forms ring-type, and the lower surface central part in its Fig. 1 is provided with the protuberance 4a of outstanding circle downwards, and this protuberance 4a is embedded in the above-mentioned opening end of oil hydraulic cylinder 1, and the upper end of oil hydraulic cylinder 1 is stopped up.In addition, the periphery of bar guide member 4 is inserted into the above-mentioned opening end of the urceolus 2 that further extends upward than above-mentioned oil hydraulic cylinder 1, and the upper end of urceolus 2 is also stopped up.
The sliding bearing 6 of tubular is installed in the penetration hole 4g that is located at bar guide member 4 centers, and above-mentioned bar 3 is inserted in this sliding bearing 6 in the mode of free sliding.
In addition, on the upper surface in Fig. 1 of bar guide member 4, with above-mentioned penetration hole 4g is that the center is formed with the ladder recess, this ladder recess by depression be circular the 1st dark recess 4b and diameter greater than the diameter of this recess 4b, depression is that circular the 2nd shallow recess 4e constitutes.And, in bar guide member 4, be formed with the intercommunicating pore 4d that shallow recess 4e is connected with above-mentioned reservoir R.
The clamp bar 5 that is layered in top among Fig. 1 of this bar guide member 4 is formed by the plate element that has the ring-type of penetration hole 5a in central authorities.The interior all Sealings 7 with the periphery sliding contact of bar 3 of being provided with in interior week at clamp bar 5, in the same manner, be provided with peripheral seal 8 on the interior week that is close to urceolus 2 in the periphery of clamp bar 5, and on the lower surface of clamp bar 5, be provided with and above-mentioned bar guide member 4 contacted one-way valves 9.Interior all Sealings 7, peripheral seal 8, one-way valve 9 are located on the clamp bar 5 all integratedly, and they are made of materials such as rubber.
Among Fig. 1, interior all Sealings 7 have sliding contact bar 3 upper side dust excluder lips 7a and at the lower side of this dust excluder lips 7a and the grease proofing lip 7b of bar 3 sliding contacts, its will be between bar 3 and the clamp bar 5 sealing.Above-mentioned peripheral seal 8 is with sealing between clamp bar 5 and the urceolus 2.
The inboard of the peristome portion 2a of clamp bar 5 by being riveted on urceolus 2, and being fixed on the urceolus 2 with the state that is pressed in bar guide member 4 sides, and with the opening end sealing of the opening end and the urceolus 2 of oil hydraulic cylinder 1, thereby will maintain sealing state in oil hydraulic cylinder 1 and the urceolus 2.
Between clamp bar 5 and bar guide member 4, mainly be between the lower surface of the 1st recess 4b of bar guide member 4 and the 2nd recess 4e and clamp bar 5, be formed with the containing space 15 that is used for the interim storage working oil.
In this containing space 15, when the bar 3 of hydraulic buffer carries out expanding-contracting action, scraped by interior all Sealings 7 attached to working oil on the periphery of bar 3, flow to the top of bar guide member 4 by the glade plane space between bar 3 and the sliding bearing 6, and stay in the containing space 15.Then, carry out expanding-contracting action repeatedly, be full of working oil thereby make in the containing space 15 by making hydraulic buffer.
The working oil that is accumulated in like this in the containing space 15 need turn back among the reservoir R, but if directly will be connected with reservoir R in the containing space 15, then gas from reservoir R adverse current in containing space 15 and bar 3 when entering in the oil hydraulic cylinder 1, the gases in the containing space 15 can be introduced in the chamber R1 of bar side.When gas entered into the chamber R1 of bar side like this, gas can be compressed in the compressed stroke of chamber R, and made the damping characteristic of hydraulic buffer produce change from regular state.
As shown in Figures 1 and 2, for fear of this point, on the lower surface of clamp bar 5, be provided with above-mentioned one-way valve 9, the lip part 9a of the front end of one-way valve 9 and seat surface 4c on the circumferential surface of the 2nd recess 4e that is located at bar guide member 4 connect, and containing space 15 and reservoir R side are demarcated, only allow that working oil is logical to reservoir R effluent from containing space 15, but stop gas from reservoir R to containing space 15 adverse currents.
As described above, the cardinal extremity of the upside among Fig. 1 of one-way valve 9 forms as one by the lower surface of bonding grade and clamp bar 5, and above-mentioned interior all Sealings 7 and peripheral seal 8 also are fastened on the clamp bar 5 with one-way valve 9 together integratedly.
Specifically, in advance clamp bar 5 is inserted in the mould of all Sealings 7 in being used to be shaped, peripheral seal 8 and one-way valve 9, and will be heated and fusion each Sealing 7,8 and the material of one-way valve 9 be injected into and pressurize in this mould and to it, and make each Sealing 7,8 and one-way valve 9 moulding, and form as one with clamp bar 5.Certainly, also can not adopt such forming method and make each Sealing 7,8 and one-way valve 9 and clamp bar 5 integrated.
Above-mentioned one-way valve 9 is that the center is shaped to opening portion and becomes big horn-like with above-mentioned bar 3, and the lip part 9a that makes its front end by self rebounding force is contacting with seat surface 4c on being located at bar guide member 4 with respect to the inner side of above-mentioned intercommunicating pore 4d.
One-way valve 9 is crooked and produce rebounding force, and the 9a of its front end boss portion is contacted with seat surface 4c, thus, the gas that one-way valve 9 has prevented to be enclosed in the reservoir R flow in the containing space 15 by intercommunicating pore 4d, and conversely in working oil lodges in containing space 15 and when pressure in the containing space 15 is risen, by making the crooked upward function of in reservoir R, emitting working oil of bringing into play of lip part 9a.
When in containing space 15, being full of under the state of working oil, when the pressure in the containing space 15 further rises, one-way valve 9 is under pressure and bends and separate from bar guide member 4, thereby containing space 15 is connected with intercommunicating pore 4d, and working oil is turned back among the reservoir R, but if be difficult to open one-way valve 9, then the pressure in the containing space 15 can become too high, thereby causes disadvantage as described above.
If the lip part 9a of one-way valve 9 contacts with seat surface 4c face with bigger circumferentia, then, make lip part 9a be difficult to separate from seat surface 4c owing to getting involved in the close property that work oil surface tension between the mutual surface of contact has improved lip part 9a.Therefore, when opening one-way valve 9, the pressure of the containing space 15 of one-way valve 9 inboards is easy to rise.
Therefore, in the present invention, close property for the surface of contact between the seat surface 4c that reduces one-way valve 9 and bar guide member 4, in order to reduce mutual area of contact, in the present embodiment, as shown in Figure 2, on the lower surface of the 9a of front end boss portion of one-way valve 9, be formed with the projection 10 of ring-type, make this projection 10 be the sealing jut.
Contact with the seat surface 4c of bar guide member 4 by the projection 10 that makes the ring-type on the lip part 9a that is located at one-way valve 9, and when one-way valve 9 is being closed, contacting from the face contact of lip part 9a and seat surface 4c level off to the line contact, thereby can not rely on the tilt length of one-way valve 9 or the repeat length of flange etc. and reduce the essence area of contact.
As shown in Figure 3, under the situation of in the past one-way valve 90, originally be in order can not to cause sealing function unsound, and be the degree of depth greater than the 2nd recess 4e of bar guide member 4 with the length setting of one-way valve 90.Therefore, one-way valve 90 bendings are bigger, and Zhou Junyu seat surface 4c contacts in the intermediate portion of thoughtful lip part 90a in the front end of its lip part 90a, and this surface of contact becomes the clitellum shape with certain width w, thereby has also increased area of contact (sealing area).
With respect to this, as shown in Figure 1 and Figure 2, one-way valve 9 of the present invention has only the fore-end of projection 10 to contact with seat surface 4c usually, therefore compares with one-way valve in the past 90 shown in Figure 3, can reduce this area of contact significantly.
In addition, in order to reduce the area of contact of this projection 10 as much as possible, make projection 10, form pointed as the sectional shape of the front end of its contacting part.
Like this, owing to the area of contact of one-way valve 9 and bar guide member 4 has reduced close property to seat surface 4c less than the area of contact of in the past one-way valve 90 and bar guide member, therefore be easy to utilize the pressure of the working oil in the containing space 15 to open one-way valve 9.
That is, Fig. 4 represents to compare with one-way valve 90 in the past, the variation in pressure of the containing space 15 when opening one-way valve 9, and in principle, when hydraulic buffer carried out expanding-contracting action, one-way valve 9 and one-way valve 90 opened and closed repeatedly.
Be full of in containing space 15 under the state of working oil, bar 3 stretches out upward, and the chamber R1 of bar side is compressed and pressure when raising, though be minute quantity, also have the glade plane space of working oil between sliding bearing 6 and bar 3 and escapes in the containing space 15.Therefore, pressure moment of containing space 15 raises, the lip part 9a of one-way valve 9 since the rising of this pressure be pushed to the top and separate from seat surface 4c, thereby make working oil flow to reservoir R via intercommunicating pore 4d from containing space 15.
Adopt the present invention, because the lip part 9a of one-way valve 9 has only its projection 10 to contact with seat surface 4c, therefore because lower to the close property of seat surface 4c, so can rely on the small pressure rising of containing space 15 and lip part 9a is separated from the seat surface 4c of the 2nd recess 4e, as shown in Figure 4, compare with one-way valve 90 in the past, can containing space 15 be connected with reservoir R in the time more early and emit working oil, thereby suppress the pressure rising of containing space 15.
In addition, in Fig. 4, solid line represents to adopt pressure one-way valve 9 of the present invention, in the containing space 15 with respect to the variation of time, and dotted line represents to adopt the variation of pressure in the past one-way valve 90, in the containing space 15 with respect to the time.
Therefore, adopt check valve structure of the present invention, the pressure that can suppress in the containing space 15 rises, and therefore can keep the sliding of bar 3 all the time well.
If the pressure of containing space 15 raises, the grease proofing lip 7b of interior all Sealings 7 that then is located at interior all sides of clamp bar 5 is pressed on the bar 3 forcefully, increased the compressing power of grease proofing lip 7b, thereby moment has increased the slip resistance between bar 3 and the grease proofing lip 7b.So the slip resistance of bar 3 also raises synchronously along with the expanding-contracting action of bar 3, and make the sliding variation of bar 3.If caused the sliding variation of bar 3 like this, then the expanding-contracting action of hydraulic buffer becomes and has some setbacks, and then can impair the shock absorption and the damping characteristics of vehicle.
Then, another embodiment shown in Figure 5 is described.
In the present embodiment, be provided with the stepped part 4f of the ring-type of constant height on the seat surface 4c of bar guide member 4, this stepped part 4f is positioned at the position than the more inner all sides of projection 10 of the ring-type on the lip part 9a that is located at one-way valve 9.
Stepped part 4f is lower than the height of projection 10 apart from the height of seat surface 4c, and in the normal state, the lower surface of lip part 9a does not contact with stepped part 4f.The drop face of circular stepped part 4f forms curved surface along the side view of the projection 10 of lip part 9a.
Other structures are identical with the 1st embodiment, therefore only identical components marked identical reference character, and omitted its detailed description.
One-way valve 9 has only the projection 10 of its lip part 9a to contact with seat surface 4c usually, therefore when containing space 15 pressure of one-way valve 9 inboards rise, lip part 9a separates from seat surface 4c immediately, and is sidelong out working oil to reservoir R, thereby the pressure that suppresses containing space 15 rises.
On the other hand, when one-way valve 9 is subjected to highpressure from reservoir R side, can towards containing space 15 inwardly the week rollover change, but the projection 10 of lip part 9a can be stuck on the step discrepancy in elevation face of stepped part 4f, and suppresses the upset of the inside all sides of lip part 9a.Simultaneously because the lower surface of lip part 9a contacts with stepped part 4f with bigger area and is close to, even so one-way valve 9 be subjected to gas pressure from reservoir R, also can keep closed condition reliably.
Therefore, when the pressure of the working oil of containing space 15 rises, one-way valve 9 is opened immediately, and working oil is emitted in reservoir R from containing space 15, and be subjected to doing the time spent from the highpressure of reservoir R at one-way valve 9, can prevent lip part 9a upset, and stop back flow of gas from reservoir R reliably to containing space 15.
In addition, in the present embodiment, the seat surface 4c and the stepped part 4f that have represented to be formed on the bar guide member 4 are the situation of horizontal plane, but also they can be formed the face of inclination or vertical face, and make the lip part 9a inclination of one-way valve 9 correspondingly or form it into vertical.
Then, another embodiment shown in Figure 6 is described.
In the present embodiment, as above-mentioned sealing jut, on the seat surface 4c of the 2nd recess 4e of bar guide member 4, be that the center is provided with the projection 11 from the outstanding ring-type of seat surface 4c with bar 3, thereby be substituted on the lip part 9a of front end of one-way valve 9 projection 10 is set.
The projection 11 of this ring-type seat surface 4c, with the contacted position of lip part 9a of the front end of one-way valve 9 on form ring-type, for the area of contact of the front end that reduces projection 11 as much as possible, its cross section is formed the front end of point.
In addition, other structures are identical with the 1st embodiment, therefore only identical components marked identical reference character, and omitted its detailed description.
In the present embodiment, the projection 11 by the ring-type on lip part 9a that makes one-way valve 9 and the seat surface 4c that is located at bar guide member 4 contacts, and has reduced the area of contact between one-way valve 9 and the bar guide member 4.
Because 9 fore-ends with the projection 11 of seat surface 4c of one-way valve contact, therefore compare with one-way valve in the past, reduced area of contact significantly, lip part 9a is attached on the seat surface 4c because of surface tension, thereby opens one-way valve 9 under the littler state that can rise at the pressure of containing space 15.
Therefore, adopt the check valve structure of present embodiment, the pressure that can suppress in the containing space 15 rises, therefore, can prevent from unnecessarily to increase the compressing power that is located at the grease proofing lip 7b of interior all Sealings 7 of all sides in the clamp bar 5, thereby can not increase the slip resistance between bar 3 and the grease proofing lip 7b, and realize the expanding-contracting action smoothly of hydraulic buffer.
Yet, in the various embodiments described above, make one-way valve 9 or lip part 9a, and the seat surface 4c of bar guide member 4 between a side or the both sides of mutual surface of contact form the asperities more coarse (coarse surface) than other position, can reduce the real contact area between one-way valve 9 and the seat surface 4c thus.
Such a structure has then weakened the degree of being close between one-way valve 9 and the seat surface 4c, is easy to open one-way valve 9 more, can rely on littler pressure that containing space 15 is connected with reservoir R.
Such a structure then is easy to open one-way valve 9 more, and the pressure that therefore can suppress in the containing space 15 rises, thereby can make the flexible work of hydraulic buffer more smooth and easy.
In addition, scope of the present invention is not limited to the detailed embodiment itself of diagram or explanation.
Claims (8)
1. hydraulic buffer has:
Oil hydraulic cylinder;
Urceolus, it is configured in the outside of above-mentioned oil hydraulic cylinder;
The grease chamber, it is formed in the above-mentioned oil hydraulic cylinder;
Reservoir, it is formed between above-mentioned oil hydraulic cylinder and the above-mentioned urceolus;
The bar guide member, it is used to stop up the opening end of above-mentioned oil hydraulic cylinder and the opening end of urceolus;
Clamp bar, its laminated configuration is on above-mentioned bar guide member;
Bar, its mode with free sliding runs through above-mentioned bar guide member and above-mentioned clamp bar;
Containing space, it is formed between above-mentioned bar guide member and the above-mentioned clamp bar, is used for the working oil that interim storage spills by the glade plane space of above-mentioned bar from above-mentioned grease chamber;
Access, it is used for above-mentioned reservoir is connected with above-mentioned containing space;
One-way valve, it is configured between above-mentioned containing space and the above-mentioned access, only allows that working oil flows to above-mentioned reservoir from above-mentioned containing space;
It is characterized in that,
The lip part of above-mentioned one-way valve be located at above-mentioned bar guide member on, be formed with from the outstanding sealing jut of mutual surface of contact on the either party of the seat surface relative with above-mentioned one-way valve.
2. hydraulic buffer according to claim 1, wherein,
Above-mentioned one-way valve is installed on the lower surface of above-mentioned clamp bar integratedly, is that the center constitutes by the elastomer of the ring-type that is horn-like expansion with above-mentioned bar, is formed with above-mentioned lip part at its front end;
Above-mentioned seat surface be positioned at above-mentioned bar around, be formed on the periphery that is located at the ladder recess on the above-mentioned bar guide member.
3. hydraulic buffer according to claim 1, wherein,
Above-mentioned sealing jut is to be located on the above-mentioned lip part and towards the projection of the outstanding ring-type of above-mentioned seat surface.
4. hydraulic buffer according to claim 1, wherein,
Above-mentioned sealing jut is to be located on the above-mentioned seat surface and towards the projection of the outstanding ring-type of above-mentioned lip part.
5. hydraulic buffer according to claim 3 mechanism, wherein,
Above-mentioned projected front ends cross section forms the shape of point.
6. hydraulic buffer according to claim 4 mechanism, wherein,
Above-mentioned projected front ends cross section forms the shape of point.
7. hydraulic buffer according to claim 3, wherein,
In above-mentioned seat surface, more inner interior all sides, be formed with constant height and be lower than the stepped part of above-mentioned rising height than the projection that is located at the ring-type on the above-mentioned flange.
8. hydraulic buffer according to claim 1, wherein,
Making the mutual surface of contact between above-mentioned lip part or the above-mentioned seat surface is the asperities more coarse than other positions.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006219447A JP2008045595A (en) | 2006-08-11 | 2006-08-11 | Check seal structure |
| JP2006219447 | 2006-08-11 | ||
| JP2007140135 | 2007-05-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101122315A CN101122315A (en) | 2008-02-13 |
| CN100510461C true CN100510461C (en) | 2009-07-08 |
Family
ID=39084773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101404394A Expired - Fee Related CN100510461C (en) | 2006-08-11 | 2007-08-10 | Check valve structure of hydraulic dumper |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008045595A (en) |
| CN (1) | CN100510461C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788109A (en) * | 2012-08-16 | 2012-11-21 | 上海汇众萨克斯减振器有限公司 | Dual-spring-loaded oil seal used for shock absorber |
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|---|---|---|---|---|
| US8991572B2 (en) * | 2009-09-03 | 2015-03-31 | GM Global Technology Operations LLC | Leak-proof damper having self-diagnostic feature |
| JP5756392B2 (en) * | 2011-11-01 | 2015-07-29 | カヤバ工業株式会社 | Sealing device and shock absorber provided with the sealing device |
| CN102364169B (en) * | 2011-11-14 | 2013-11-20 | 揭阳市天诚密封件有限公司 | Double-lip oil seal device capable of regulating pressure automatically |
| CN102392897A (en) * | 2011-11-14 | 2012-03-28 | 揭阳市天诚密封件有限公司 | Double-lip oil seal capable of sealing in movement |
| JP6581895B2 (en) * | 2015-12-24 | 2019-09-25 | 株式会社ショーワ | Pressure shock absorber |
| CN114526306A (en) * | 2022-02-21 | 2022-05-24 | 山东克耐特油封有限公司 | Self-lubricating rubber and preparation process thereof |
| CN116428303A (en) * | 2023-04-17 | 2023-07-14 | 浙江戈尔德智能悬架股份有限公司 | Damping electromagnetic valve device |
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| JP2003056628A (en) * | 2001-08-22 | 2003-02-26 | Kayaba Ind Co Ltd | Check seal part structure |
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- 2007-08-10 CN CNB2007101404394A patent/CN100510461C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2200717A (en) * | 1987-01-30 | 1988-08-10 | Fichtel & Sachs Ag | Vibration absorber for vehicles |
| EP0609909A1 (en) * | 1988-02-22 | 1994-08-10 | Unisia Jecs Corporation | Shock absorber |
| US5176229A (en) * | 1989-09-29 | 1993-01-05 | Atsugi Unisia Corporation | Hydraulic shock absorber with a rod guide having an annular doubled wall section |
| DE19713784A1 (en) * | 1997-04-03 | 1998-06-25 | Mannesmann Sachs Ag | Multipart guide for piston connecting rod for hydropneumatic twin tube vibration damper |
| CN2459208Y (en) * | 2000-08-23 | 2001-11-14 | 重庆汇洋减振器厂 | External circulation type liquid damping vibration damper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788109A (en) * | 2012-08-16 | 2012-11-21 | 上海汇众萨克斯减振器有限公司 | Dual-spring-loaded oil seal used for shock absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008045595A (en) | 2008-02-28 |
| CN101122315A (en) | 2008-02-13 |
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