CN1839064A - Cylinder, in particular for a motor vehicle hydraulic brake system - Google Patents
Cylinder, in particular for a motor vehicle hydraulic brake system Download PDFInfo
- Publication number
- CN1839064A CN1839064A CN 200480023931 CN200480023931A CN1839064A CN 1839064 A CN1839064 A CN 1839064A CN 200480023931 CN200480023931 CN 200480023931 CN 200480023931 A CN200480023931 A CN 200480023931A CN 1839064 A CN1839064 A CN 1839064A
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- CN
- China
- Prior art keywords
- cylinder
- sealing
- lip
- sealing surface
- circle back
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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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 77
- 230000000994 depressogenic effect Effects 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000153 supplemental effect Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention relates to a cylinder, in particular for a motor vehicle hydraulic brake systems comprising at least one case (2) provided with a plunger piston (3) movable therein, at least one angular sealing collar (5) arranged in the snap ring groove (4) of the case (2), an internal lip (6) dynamically applied to the plunger piston (3) by a first sealing surface (8), an external lip (7) statically applied to the bottom of the snap ring groove (4) by a second sealing surface (9) and the back of the collar (17). Said invention is characterised in that the back of the collar (17) is not flat and is provided with at least one peripheral-sealing surface (18, 24).
Description
Technical field
The present invention relates to a kind of cylinder that is particularly useful for motor vehicle hydraulic brake system, this cylinder comprises at least one plunger that can move and at least one annular seal circle in housing, the sealing circle is arranged in the circular groove of housing, and has with primary sealing area and abut in the inner sealing lip of the dynamic stress on the plunger, abut in the outside seal lip and the circle back of the static strength on the bottom of circular groove with secondary sealing area.
Background technology
DE 101 20 913 A1 disclose such cylinder.This cylinder comprises the seal ring at the circle back of the outside seal lip of inner sealing lip with dynamic stress, static strength and flat design.In this application, disadvantage is that the seal ring with circle back may be sucked on the sidewall that fixedly is fitted in circular groove.
Seal ring is carried out the function of boiler check valve, described boiler check valve is sealing load chamber when actuating cylinder on the one hand, thereby make the pressure in pressure chamber to increase, on the other hand, do the time spent permission at travel power control such as ESP or ASR and carry out supplemental pumping by cylinder from compensating tank, wherein pressure medium flow is crossed the outside seal lip of seal ring.
Must guarantee the sealing function of sealing lip, so that the operation of cylinder trouble free ground.Owing to require the outside seal lip of static strength to be designed to have bigger elasticity, so that (pressure medium) can flow through, therefore damage or dirt particle can cause the sealing surface at outside seal lip place to occur leaking, as shown in testing.
Summary of the invention
As mentioned above, the purpose of this invention is to provide a kind of following improved cylinder.
According to the present invention, this purpose can be designed to injustice/uneven and make the circle back comprise that at least one is realized around sealing surface by enclosing the back.Described sealing surface is the redundancy structure (Redundanz) of the sealing surface of outside seal lip, has also improved the impregnability of cylinder simultaneously.Another advantage that the sealing surface at place, circle back is realized is, externally between the sealing surface at the secondary sealing area at sealing lip place and place, circle back, in heel zone, the outside of seal ring (Fersenbereich), sealed certain pressure medium space, thereby prevented that seal ring from moving along the direction of the bottom of circular groove.Guarantee reclining of sealing surface thus.
In favourable improvement of the present invention, described circle back comprise just partly by radial slot shape depressed part cut off around the annular arrangement face, therefore externally fringe region exist the annular arrangement that do not have depressed part around sealing surface.Owing to increased flow cross section, so groove depression portion does the time spent in the power control of travelling and improves and flow through flowing of outside seal lip.
When the circle back comprise as sealing surface around the sealing fin time, obtained a special simple embodiment of seal ring.
Another advantageous embodiments imagination of the present invention, on the circle back, be provided with two around sealing surface.Thus for sealing surface provides another redundancy structure, its centre circle back preferably include two as sealing surface around the sealing fin.
In favourable improvement of the present invention, seal ring has axial salient between inner sealing lip and outside seal lip, and this salient is axially stretching out above sealing lip.This salient has improved the impregnability of seal ring on the one hand, and the inner sealing lip that prevents dynamic stress on the other hand is stuck in the gap between housing and the plunger, and the outside seal lip that prevents static strength is out of shape owing to the sidewall of bump circular groove.
Description of drawings
The present invention will be described with reference to the accompanying drawing that embodiment is shown below.In the schematic view of height in the accompanying drawings:
Fig. 1 is the local longitudinal sectional view according to first form of implementation of cylinder of the present invention;
Fig. 2 is the local longitudinal sectional view according to second form of implementation of cylinder of the present invention;
Fig. 3 is the 3-D view according to the seal ring of the 3rd form of implementation of cylinder of the present invention; And
Fig. 4 is the local longitudinal sectional view of the seal ring of Fig. 3.
The specific embodiment
Fig. 1 show with partial view cylinder first embodiment for the requisite parts of the present invention, described cylinder is designed to for example be used for the master cylinder 1 with plunger tpe and series-mode frame form of motor vehicle hydraulic brake system.The mode of operation of this master cylinder 1 is known on principle, and therefore the feature for necessity of the present invention will mainly be described.In addition, the pressure circuit that order is provided with before and after two of the master cylinder 1 of series-mode frame form is almost completely identical on its structure and mode of operation, and therefore a pressure circuit only is described.
Pressure circuit with the master cylinder shown in the partial view 1 comprises the plunger 3 that can move in housing 2, wherein the seal ring 5 of annular arrangement is arranged in the circular groove 4 of housing 2 and has the inner sealing lip 6 of dynamic stress and the outside seal lip 7 of static strength.The inner sealing lip 6 of dynamic stress abuts on the plunger 3 with primary sealing area 8, and the outside seal lip 7 of static strength abuts on the bottom 10 of circular groove 4 with secondary sealing area 9.
The pressure chamber 11 that is in the master cylinder 1 under the non-actuated condition shown in Fig. 1 also links to each other with a stress-free compensating tank (not shown) by the hole 14 in the bowl-shape wall 15 of plunger 3 with filling slot 13 by the pressure fluid channel 12 in the housing 2.Here plunger 3 utilizes compression spring 16 prestrains.
In order to activate, along direction of actuation A mobile plunger 3.At this moment, the compression spring 16 that moves through of plunger 3 passes to unshowned second pressure circuit.When hole 14 is positioned at the zone of seal ring 5, just passed through the so-called idle travel of master cylinder 1, because pressure medium no longer can enter pressure chamber 11 through via hole 14 from filling slot 13.Connection between pressure chamber 11 and the compensating tank is interrupted.Raise by pressure in the seal ring 5 leak free pressure chambers 11 current.This moment since in the pressure chamber 11 elevated pressure inner sealing lip 6 and outside seal lip 7 keep abutting on the bottom 10 of plunger 3 or circular groove 4 with its sealing surface 8,9, and provide sealing thus.Simultaneously, the circle back 17 of seal ring 5 is pressed against on the first side wall 20 of circular groove 4 with sealing surface 18 owing to pressure raises.This makes can activate unshowned car side brake in the brake circuit dividually, be connected to the pressure chamber of master cylinder 1 to the Hydrodynamic unit fluid power of described car side brake by having electromagnetic valve, thereby can realize electronically controlled brake operating (ABS) or riding stability control (ESP).
Do the time spent at ESP, when actuating plunger 3, may need from compensating tank, to replenish the suction pressure medium via pressure chamber 11 along the direction of car side brake, this preferably realizes by pump, the inlet of described pump can be connected to the pressure chamber of master cylinder 1 alternatively or be connected to car side brake, so that along the direction of wheel braking or along direction (principle (R ü ckf rderprinzip) is carried in the backhaul) conveyance fluid of master cylinder 1.For this reason, (pressure medium) flows through the outside seal lip 7 of seal ring 5, because outside seal lip 7 overturns along the direction of inner sealing lip 6 owing to suction pressure, sealing surface 9 no longer abuts on the bottom 10 of circular groove as a result.
As shown in Figure 1, seal ring 5 the circle 17 places, back have around annular seal face 18, the sealing face can be considered the redundancy structure of the secondary sealing area 9 of outside seal lip 7 because on the outside face 21 that is arranged on outside seal lip 7 around fin 22 on the secondary sealing area 9 that forms may owing to damage or pressure medium in the dirt particle blowing-by that become.
As mentioned above, do the time spent at ESP, utilize pump through pressure medium channel 12, filling slot 13, the little gap between housing 2 and plunger 3, along the outside seal lip 7 and the pressure chamber 11 of the direction upset of inner sealing lip 6, from compensating tank supplemental pumping pressure medium, described compensating tank is taken over by means of unshowned container and is arranged in the container hole 23 of housing 2 along the direction of car side brake.At this moment, because 7 upsets of outside seal lip, secondary sealing area 9 is inoperative.Sealing surface 18 on circle back 17 is owing to swabbing pressure leaves sidewall 20, because the seal ring 5 in the circular groove 4 can move slightly along direction of actuation A.Flow cross section is owing to radial slot shape depressed part 19 increases, thereby can have enough pressure medium flow to cross seal ring 5.
Fig. 2 illustrates the parts required in this invention of second embodiment of cylinder with partial view, and wherein cylinder is designed for the master cylinder 1 with plunger tpe and series-mode frame form of vehicle braking device.
As shown in Figure 2, the difference of the seal ring of present embodiment and seal ring illustrated in fig. 1 only is to enclose the design at back 17.Therefore, the cooresponding or components identical among Fig. 2 being appointed as the reference number that uses among Fig. 1 also will no longer describe in detail.
Different with the embodiment of reference Fig. 1 explanation, the circle back 17 of second embodiment comprises two sealing fins 25 as sealing surface 24.
Except redundancy structure, enclose another advantage of the sealing surface 24 on the back 17 here as can be seen.When activating master cylinder 1, externally between the sealing surface 24 on secondary sealing area 9 on the sealing lip 7 and the circle back 17, in heel zone, the outside of seal ring 5 27, sealed certain pressure medium space 26.Prevent that thus seal ring 5 from moving and guaranteed that thus inner sealing lip 6 and outside seal lip 7 abut on the bottom 10 of plunger 3 or circular groove 4 reliably along the direction of the bottom 10 of circular groove 4.Certainly, the embodiment of reference Fig. 1 explanation and below will illustrate according to the embodiment of Fig. 3 and 4 in also can realize this advantage.
Fig. 3 and 4 illustrates the seal ring of the 3rd embodiment of cylinder of the present invention, and wherein cylinder for example is designed to master cylinder 1, and wherein Fig. 3 illustrates the 3-D view of seal ring 5, and Fig. 4 then illustrates the local longitudinal sectional view of seal ring 5.
The seal ring 5 of present embodiment only is with the difference of the seal ring of Fig. 1, is provided with the axial salient 28 that stretches out above these two sealing lips 6,7 vertically between inner sealing lip 6 and outside seal lip 7.Therefore, among Fig. 3 and 4 similarly or components identical represent with the reference number of Fig. 1 and will no longer describe in detail.
The cirque structure of seal ring 5 as seen from Figure 4, and as can be seen, circle back 17 be designed to just partly by radial slot shape depressed part 19 cut off around the annular arrangement face, thereby in the outer edge zone may 31 at circle back 17, exist around annular seal face 18.As shown in Figure 4, spacing and starlike ground/radial be arranged on circle back 17 on of depressed part 19 to equate to each other.Yet, on arranging, also can imagine other modification.
In the seal ring of first and second embodiment, also can be provided with according to Fig. 3 and 4 salients 28 of describing and illustrating.
List of reference characters
1 master cylinder, 28 protuberances
2 housings, 29 sidewalls
3 plungers, 30 ports
4 cannelures, 31 fringe regions
5 sealing ring A direction of actuation
6 inner sealing lips
7 outside seal lips
8 sealing surfaces
9 sealing surfaces
10 bottoms
11 pressure chambers
12 pressure medium channels
13 filling slots
14 holes
15 walls
16 compression springs
17 circle backs
18 sealing surfaces
19 depressed parts
20 sidewalls
21 outside faces
22 fins
23 container holes
24 sealing surfaces
25 sealing fins
26 pressure medium space
Heel zone, 27 outside
Claims (6)
1. cylinder that is particularly useful for motor vehicle hydraulic brake system, comprise plunger (3) and at least one annular seal circle (5) that at least one can move in housing (2), described seal ring (5) is arranged in the circular groove (4) of housing (2), and has an inner sealing lip (6) that abuts in the dynamic stress on the plunger (3) with primary sealing area (8), outside seal lip (7) and circle back (17) with static strength on the bottom (10) that abuts in circular groove (4) with secondary sealing area (9), it is characterized in that, described circle back (17) is designed to uneven, and comprise at least one around sealing surface (18; 24).
2. according to the cylinder of claim 1, it is characterized in that, described circle back (17) comprise around the annular arrangement face, described is just partly cut off by radial slot shape depressed part (19), thus the outer edge zone may (31) at described circle back (17) in existence do not have depressed part, annular arrangement around sealing surface (18).
3. according to the cylinder of claim 1, it is characterized in that, described circle back (17) comprise as sealing surface (24) around sealing fin (25).
4. according to the cylinder of claim 1, it is characterized in that, described circle back (17) be provided with two around sealing surface (24).
5. according to the cylinder of claim 4, it is characterized in that, described circle back (17) comprise two as sealing surface (24) around sealing fin (25).
6. each cylinder is characterized in that described seal ring (5) has the axial salient (28) that stretches out above sealing lip (6,7) vertically between inner sealing lip (6) and outside seal lip (7) in requiring according to aforesaid right.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10338416 | 2003-08-18 | ||
| DE10338416.2 | 2003-08-18 | ||
| DE102004014867.8 | 2004-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1839064A true CN1839064A (en) | 2006-09-27 |
| CN100443338C CN100443338C (en) | 2008-12-17 |
Family
ID=37016130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800239318A Active CN100443338C (en) | 2003-08-18 | 2004-08-04 | Cylinder, in particular for a motor vehicle hydraulic brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100443338C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328940B (en) * | 2007-05-22 | 2012-02-15 | 罗伯特博世有限公司 | Master cylinder for braking motor vehicle |
| CN102834613A (en) * | 2010-04-07 | 2012-12-19 | 罗伯特·博世有限公司 | Annular seal element |
| CN103260975A (en) * | 2010-12-21 | 2013-08-21 | 罗伯特·博世有限公司 | Gasket for the master cylinder of braking system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009028139A1 (en) * | 2009-07-30 | 2011-02-03 | Robert Bosch Gmbh | Sealing ring and arrangement with a sealing ring |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2340466A (en) * | 1939-09-01 | 1944-02-01 | Automotive Prod Co Ltd | Piston and like packing device |
| DE1151155B (en) * | 1955-06-23 | 1963-07-04 | Renault | Ring-shaped seal, especially large diameter |
| FR1286775A (en) * | 1961-01-24 | 1962-03-09 | Luxembourg Brev Participations | Improvements made to sliding seals, especially for high pressures |
| US5328178A (en) * | 1992-10-14 | 1994-07-12 | General Motors Corporation | Brake master cylinder seal |
| US5429374A (en) * | 1992-12-04 | 1995-07-04 | Ford Motor Company | Pressure sensitive resilient dynamic seal |
| DE4323266C2 (en) * | 1993-07-12 | 1995-08-03 | Busak & Luyken Gmbh & Co | Sealing arrangement |
| US5524904A (en) * | 1994-11-10 | 1996-06-11 | Kelsey-Hayes Company | Lip seal for antilock braking system isolation valve and similar valves |
| DE19728605C2 (en) * | 1997-07-04 | 2000-03-02 | Freudenberg Carl Fa | Rod or piston seal |
| DE10120913A1 (en) * | 2000-07-28 | 2002-05-02 | Continental Teves Ag & Co Ohg | Master brake cylinder with plunger and radial grooves inserted in the housing to accommodate the sealing sleeves |
| DE10047329A1 (en) * | 2000-09-25 | 2002-04-11 | Continental Teves Ag & Co Ohg | Master cylinder for car braking system is fitted with plunger and primary sleeve in front of breather port with sealing lip on opposite side to port and integral annular collar on side nearest it |
-
2004
- 2004-08-04 CN CNB2004800239318A patent/CN100443338C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328940B (en) * | 2007-05-22 | 2012-02-15 | 罗伯特博世有限公司 | Master cylinder for braking motor vehicle |
| CN102834613A (en) * | 2010-04-07 | 2012-12-19 | 罗伯特·博世有限公司 | Annular seal element |
| CN102834613B (en) * | 2010-04-07 | 2016-08-03 | 罗伯特·博世有限公司 | The potted component of annular |
| CN103260975A (en) * | 2010-12-21 | 2013-08-21 | 罗伯特·博世有限公司 | Gasket for the master cylinder of braking system |
| CN103260975B (en) * | 2010-12-21 | 2016-01-13 | 罗伯特·博世有限公司 | Brake system master cylinder sealing member |
| US9239110B2 (en) | 2010-12-21 | 2016-01-19 | Robert Bosch Gmbh | Brake system master-cylinder seal |
| US9631724B2 (en) | 2010-12-21 | 2017-04-25 | Robert Bosch Gmbh | Brake system master-cylinder seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100443338C (en) | 2008-12-17 |
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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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230407 Address after: Hannover Patentee after: Continental Automotive Technology Co.,Ltd. Address before: Frankfurt, Germany Patentee before: CONTINENTAL TEVES AG & Co. OHG |
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| TR01 | Transfer of patent right |