CN102261421B - Vibration damper - Google Patents
Vibration damper Download PDFInfo
- Publication number
- CN102261421B CN102261421B CN201110125699.0A CN201110125699A CN102261421B CN 102261421 B CN102261421 B CN 102261421B CN 201110125699 A CN201110125699 A CN 201110125699A CN 102261421 B CN102261421 B CN 102261421B
- Authority
- CN
- China
- Prior art keywords
- protective tube
- ring
- vibration damper
- cylinder barrel
- piston rod
- Prior art date
- 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
-
- 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
- F16F9/38—Covers for protection or appearance
Abstract
The present invention relates to a kind of vibration damper; comprise cylinder barrel; in this cylinder barrel, piston rod performs axially reciprocating; wherein be provided with protective tube regularly relative to piston rod position; this protective tube surrounds piston rod, and be provided with ring in the annular space wherein between protective tube and cylinder barrel, described ring prevents dirt from entering in the annular chamber surrounded by protective tube; wherein, this ring has vortex chamber's inner mold along the inflow direction of protective tube.
Description
Technical field
The present invention relates to a kind of vibration damper; it comprises cylinder barrel; in this cylinder barrel, piston rod performs axially reciprocating; wherein be provided with protective tube regularly relative to piston rod position; this protective tube surrounds piston rod; be provided with ring in annular space wherein between protective tube and cylinder barrel, ring prevents dirt from entering in the annular chamber surrounded by protective tube.
Background technique
Usually, vibration damper active chamber with the region of plunger rod contacts in sealed by piston rod seal component.The wearing and tearing that if piston rod seal component is impaired or it is increased, then obviously affect the working life of vibration damper thus.Therefore, on the one hand the manufacture on surface of piston rod and the roughness of piston rod seal component accurately match.On the other hand, the surface of piston rod is covered by the protection bellows fixed regularly relative to piston rod position or the protective tube that is prevented from external action.
Substantially be arranged on vertically in the vibration damper in traveling mechanism, reliably ensure that the protective action of protection bellows or protective tube.It should be noted herein, flexible protection bellows is obviously expensive in the protective tube of rigidity in mounting cost as parts, and the internal diameter of described rigid protective pipe is greater than the external diameter of the outer cylinder of vibration damper usually.
Be arranged in the vibration damper in traveling mechanism obliquely, dust and salt fog can enter in the annular space between protective tube and outer cylinder, and arrive the end regions of cylinder barrel, make dust and dirt arrive the surface of piston rod.Therefore the wearing and tearing of vibration damper are caused obviously to increase.
By the known a kind of vibration damper of DE104172A, described vibration damper has the Sealing between protective tube and outer cylinder.The seal is made up of the ring of porous, and this ring achieves the air exchange between the inside and external environment condition of protective tube, thus prevents pump efficiency from answering when piston rod does turnover motion relative to cylinder barrel.Herein, the inwall of protective tube directly slides on the outer circumferential face of ring, forms permanent friction thus.The dirt be deposited on the inwall of protective tube causes the wearing and tearing of ring, therefore weakens again the function of ring.
Summary of the invention
The object of the invention is to, provide a kind of for the simple of pollution problem described above and wear problem and the scheme of low cost.
Object of the present invention is realized by following measures, and namely ring is achieved having vortex chamber's inner mold along the inflow direction entering protective tube.
The invention has the advantages that, the spaced radial had relative to cylinder barrel can be implemented as.Vortex chamber's inner mold make piston rod movement and therefore protective tube motion in circulation air diverts to the opening end direction towards protective tube.Test verified, only just can avoid shadoweffect by vortex chamber's inner mold and prevent dirt from entering along the direction of piston rod.
In the design that another is favourable, vortex chamber's inner mold is in the side in ring.The inner mold of side can easily be manufactured, especially because there is not undercutting.Thus, described ring can be made of plastics without any problems.
Vortex chamber by around wall form, described wall axially extends to the bottom of ring along the direction of cylinder barrel.
According to the present invention, wall is implemented as and tilts along the direction towards cylinder barrel, and the diameter of vortex chamber is diminished along the direction towards bottom.The air flowing into vortex chamber is diverted, thus produces the air cushion of the annular space surrounded between protective tube and cylinder barrel.
Ring can be fixed on cylinder barrel side.
In order to fixing, ring can be pressed on cylinder barrel.As an alternative, ring is welded with cylinder barrel.
Another kind of fixed solution is that ring is the constituent element of lid, and described lid is supported on the side of cylinder barrel.
For the situation that protective tube is installed obliquely relative to piston rod and cylinder barrel, or such as when clearing the jumps deflection, described protective tube is centered smoothly, because the direction that the outside side face of ring is implemented towards protective tube inwall is convexity.
In substitute variants, ring is fixed on protective tube in inner side.
Wherein, the inwall of ring, towards being radially-inwardly implemented as convexity, contacts can not be formed with cylinder barrel to scraping when protective tube is in oblique position.
Accompanying drawing explanation
By means of the following drawings, detailed description the present invention is described.
Wherein:
Fig. 1 shows vibration damper with sectional view,
Fig. 2 shows the phantom of Fig. 1,
Fig. 3 shows as the ring in Fig. 1 and Fig. 2 of single-piece,
Fig. 4 shows the ring of the part as cap or the part as protective tube.
Embodiment
Fig. 1 shows vibration damper 1, and it has inner cylinder tube 3 and outer cylinder 5.Inner cylinder tube 3 is by impact-absorbing medium, and such as oil is full of completely, and is closed by piston rod guiding device 7 together with outer cylinder 5.In principle, the present invention can be used in the vibration damper of arbitrary structures form.
Piston rod 9 can be provided with axial motion in inner cylinder tube 3, and do axial to-and-fro motion.Piston rod 9 is supported with the protective tube 11 of rigidity, and this protective tube 11 comprises end cap 13 and body 15.Described body and piston rod 9 define annular chamber 17 and the internal diameter of body is greater than outer cylinder 5, thus forms annular space 19 between two parts 5,11.
Protective tube 11 should prevent dirt particle for the direct impact of piston rod 9.These dirt particles may be deposited in the piston rod seal component 21 be fixed in piston rod guiding device 7 that piston rod 9 also weares and teares.
As from Fig. 1, Fig. 2 and Fig. 3, be provided with ring 23 in annular space 19, this ring has vortex chamber's inner mold 25 along the inflow direction entered in protective tube.The side of vortex chamber's inner mold in described ring.
Vortex chamber 27 by around wall 29 form, described wall 29 extends to the bottom 31 of ring 23 vertically towards the direction of cylinder barrel 5.The wall 29 pointing to the direction of cylinder barrel 5 tilts, thus the diameter of vortex chamber 27 is diminished along the direction towards bottom 31.
In this embodiment, described ring is such as fixed on cylinder barrel side by the press fit particularly occurred in the ring 23 be made of plastics, thus can not damage the surface of outer cylinder when mounted.As an alternative, ring 23 can be welded with cylinder barrel 5.
In piston rod 9 or protective tube 11 to-and-fro motion in the direction of the arrow, air and dirt particle by together with carry towards the direction of annular chamber 17.Air hits in vortex chamber's inner mold 25, and in vortex chamber 27, form air cushion thus, this air cushion can extend to the inwall of protective tube, and this protective tube has the spaced radial relative to ring and do not contact with ring 23 thus in the installation of routine.
Certain oblique position relative to cylinder barrel has been occupied and situation about contacting with cylinder barrel for protective tube 11; be convexity by the direction that the outside side face 33 of ring 23 is implemented as towards the inwall of protective tube 11, prevent the damage of the parts 11,5,23 relative to each other moved between two.
Visible by a left side half sectional view of Fig. 4, as an alternative, ring 23 can be the constituent element of lid 35, and ring 23 is fixed on cylinder barrel 5 by its side being supported on cylinder barrel 5 thus.
In the right side half sectional view of Fig. 4, ring 23 is on the inwall of protective tube 11.In order to realize the contact performance of protective tube relative to the surface smoothness of cylinder barrel equally, the inwall of ring 23 is implemented as convexity.In order to keep relative to total length like traditional protection tubing, ring 23 is arranged on the end away from end cap 13.
Reference numerals list
1 vibration damper
3 inner cylinder tubes
5 outer cylinders
7 piston rod guiding devices
9 piston rods
11 protective tubes
13 end caps
15 bodys
17 annular chambers
19 annular spaces
21 piston rod seal components
23 rings
25 vortex chamber's inner mold
27 vortex chambers
29 walls
Bottom 31
33 outer circumferential faces
35 lids
Claims (10)
1. a vibration damper (1), comprise cylinder barrel, in this cylinder barrel, piston rod (9) performs axially reciprocating, wherein be provided with protective tube (11) regularly relative to described piston rod (9) position, this protective tube surrounds described piston rod (9), ring (23) is provided with in annular space (19) wherein between described protective tube (11) and described cylinder barrel (5), in the annular chamber (17) that described ring prevents from dirt from entering being surrounded by described protective tube (11), it is characterized in that, described ring (23) has vortex chamber's inner mold (25) along the inflow direction entering described protective tube (11).
2. according to vibration damper according to claim 1, it is characterized in that, described vortex chamber inner mold (25) is embodied in the side in described ring (23).
3. according to vibration damper according to claim 1, it is characterized in that, by around wall (29) form vortex chamber (27), described wall extends to the bottom (31) of described ring (23) vertically towards the direction of described cylinder barrel (5).
4. according to vibration damper according to claim 3, it is characterized in that, described wall (29) is implemented as and tilts towards the direction of described cylinder barrel (5), and the diameter of described vortex chamber (27) is diminished towards the direction of bottom (31).
5. according to vibration damper according to claim 1, it is characterized in that, described ring (23) is fixed in cylinder barrel side.
6. according to vibration damper according to claim 5, it is characterized in that, described ring (23) welds with described cylinder barrel (5).
7. according to vibration damper according to claim 5, it is characterized in that, described ring (23) is the constituent element of lid (35), and described lid is supported on the side of described cylinder barrel (5).
8. according to vibration damper according to claim 1, it is characterized in that, it is convexity that the outside side face (33) of described ring (23) is implemented as on the direction of the inwall towards described protective tube (11).
9. according to vibration damper according to claim 1, it is characterized in that, described ring (23) is fixed on described protective tube (11) in inner side.
10. according to vibration damper according to claim 9, it is characterized in that, the inwall of described ring (23) is radially inwardly implemented as convexity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010028860.8 | 2010-05-11 | ||
| DE201010028860 DE102010028860B4 (en) | 2010-05-11 | 2010-05-11 | vibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102261421A CN102261421A (en) | 2011-11-30 |
| CN102261421B true CN102261421B (en) | 2016-01-20 |
Family
ID=44859740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110125699.0A Active CN102261421B (en) | 2010-05-11 | 2011-05-10 | Vibration damper |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102261421B (en) |
| BR (1) | BRPI1102116A2 (en) |
| DE (1) | DE102010028860B4 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011102466A1 (en) | 2010-11-26 | 2012-05-31 | Volkswagen Aktiengesellschaft | Damper for a motor vehicle |
| DE102014211264A1 (en) | 2014-06-12 | 2015-12-17 | Zf Friedrichshafen Ag | vibration |
| CN106594150A (en) * | 2016-12-23 | 2017-04-26 | 怀宁县群力汽车配件有限公司 | Novel shock absorber for automobile |
| DE102019211029A1 (en) * | 2019-07-25 | 2021-01-28 | Volkswagen Aktiengesellschaft | Damper arrangement for a motor vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE868393C (en) * | 1949-07-02 | 1953-10-29 | Hemscheidt Maschf Hermann | Guide and seal of the piston and the piston rod in the cylinder housing, especially in the case of hydraulic vibration dampers in motor vehicles |
| US4085925A (en) * | 1976-03-31 | 1978-04-25 | Carl Ullrich Peddinghaus | Hydro-pneumatic shock absorber |
| US4445598A (en) * | 1981-05-08 | 1984-05-01 | Societa Impianti Elettrici Telefonici Telegrafici E Costruzioni Edili S.P.A. | Two-tube telescopic hydraulic shock absorbers |
| US4836148A (en) * | 1988-06-13 | 1989-06-06 | General Motors Corporation | Shrouding for engine cooling fans |
| US6276692B1 (en) * | 1998-07-14 | 2001-08-21 | Asea Brown Boveri Ag | Non-contact sealing of gaps in gas turbines |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1041742B (en) * | 1957-02-19 | 1958-10-23 | Fichtel & Sachs Ag | Sealing of telescopic shock absorbers |
| FR1249285A (en) * | 1959-11-09 | 1960-11-21 | J Souvignet Et Fils Ets | Sliding ring for telescopic shock absorbers |
| DD52970A1 (en) * | 1965-10-22 | 1966-12-20 | Siegfried Uhlmann | Anti-slip protection for telescopic tubes and protective sleeves of struts and shock absorbers |
| DE1951754U (en) * | 1966-10-07 | 1966-12-15 | Fichtel & Sachs Ag | PROTECTIVE TUBE FOR THE PISTON ROD IN VIBRATION DAMPERS AND SUSPENSIONS WITH TELESCOPIC DESIGN. |
| DE102006010332A1 (en) * | 2006-03-07 | 2007-09-13 | Zf Friedrichshafen Ag | Vibration damper, especially for motor vehicles, has guiding element between protective tube and tubular component, with protective tube supported via guiding element in relation to tubular component, or has small clearance |
| DE102007021385B4 (en) * | 2007-05-04 | 2012-11-29 | Zf Friedrichshafen Ag | Vibration damper with protection tube |
-
2010
- 2010-05-11 DE DE201010028860 patent/DE102010028860B4/en active Active
-
2011
- 2011-05-10 CN CN201110125699.0A patent/CN102261421B/en active Active
- 2011-05-11 BR BRPI1102116 patent/BRPI1102116A2/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE868393C (en) * | 1949-07-02 | 1953-10-29 | Hemscheidt Maschf Hermann | Guide and seal of the piston and the piston rod in the cylinder housing, especially in the case of hydraulic vibration dampers in motor vehicles |
| US4085925A (en) * | 1976-03-31 | 1978-04-25 | Carl Ullrich Peddinghaus | Hydro-pneumatic shock absorber |
| US4445598A (en) * | 1981-05-08 | 1984-05-01 | Societa Impianti Elettrici Telefonici Telegrafici E Costruzioni Edili S.P.A. | Two-tube telescopic hydraulic shock absorbers |
| US4836148A (en) * | 1988-06-13 | 1989-06-06 | General Motors Corporation | Shrouding for engine cooling fans |
| US6276692B1 (en) * | 1998-07-14 | 2001-08-21 | Asea Brown Boveri Ag | Non-contact sealing of gaps in gas turbines |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010028860B4 (en) | 2015-01-08 |
| BRPI1102116A2 (en) | 2012-10-09 |
| CN102261421A (en) | 2011-11-30 |
| DE102010028860A1 (en) | 2011-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |