DE102011089987A1 - Storage device for intermediately storing returned brake fluid from wheel brake cylinders in hydraulic assembly of passenger car brake system, has sealing ring fixedly held at storage piston by deformation, where piston is produced as blank - Google Patents
Storage device for intermediately storing returned brake fluid from wheel brake cylinders in hydraulic assembly of passenger car brake system, has sealing ring fixedly held at storage piston by deformation, where piston is produced as blank Download PDFInfo
- Publication number
- DE102011089987A1 DE102011089987A1 DE102011089987A DE102011089987A DE102011089987A1 DE 102011089987 A1 DE102011089987 A1 DE 102011089987A1 DE 102011089987 A DE102011089987 A DE 102011089987A DE 102011089987 A DE102011089987 A DE 102011089987A DE 102011089987 A1 DE102011089987 A1 DE 102011089987A1
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- Germany
- Prior art keywords
- blank
- piston
- sealing ring
- storage
- storage device
- 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.)
- Pending
Links
- 238000003860 storage Methods 0.000 title claims abstract description 59
- 238000007789 sealing Methods 0.000 title claims abstract description 34
- 239000012530 fluid Substances 0.000 title description 4
- 230000009466 transformation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
- B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/42—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having expanding chambers for controlling pressure, i.e. closed systems
- B60T8/4275—Pump-back systems
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Bei einer Speichereinrichtung (10) einer Fahrzeugbremsanlage mit einem Speicherkolben (18) und einem daran angeordneten Dichtring (36) ist der Dichtring (36) an einem als Rohling (38) hergestellten Speicherkolben (18) mittels einer Umformung ortsfest gehalten.In a storage device (10) of a vehicle brake system with a storage piston (18) and a sealing ring (36) arranged thereon, the sealing ring (36) is held stationary by means of a forming on a storage piston (18) produced as a blank (38).
Description
Stand der TechnikState of the art
Die Erfindung betrifft eine Speichereinrichtung einer Fahrzeugbremsanlage mit einem Speicherkolben und einem daran angeordneten Dichtring. Ferner betrifft die Erfindung eine Verwendung einer derartigen Speichereinrichtung an einem Hydraulikaggregat einer Fahrzeugbremsanlage.The invention relates to a storage device of a vehicle brake system with a storage piston and a sealing ring arranged thereon. Furthermore, the invention relates to a use of such a memory device on a hydraulic unit of a vehicle brake system.
Speichereinrichtungen werden bei Fahrzeugbremsanlagen in deren Hydraulikaggregat verwendet, um rückgeführtes Bremsfluid aus Radbremszylindern zwischenzuspeichern. Es sind Speichereinrichtungen in Form von Niederdruckspeicherkolben bekannt, deren Kolben aus Metall zerspanend oder mittels Tiefziehen hergestellt worden ist. Hydraulikseitig wird an diesem Kolben bei der Herstellung eine Schulter ausgeformt, über die ein O-Ring eingesetzt wird. Der derart über eine Schulter eingesetzte O-Ring ist beim Verfahren des Kolbens in beide Bewegungsrichtungen verliersicher gehalten.Storage devices are used in vehicle brake systems in their hydraulic power unit to buffer recirculated brake fluid from wheel brake cylinders. There are storage devices in the form of low-pressure accumulator piston known whose piston has been made of metal by machining or by deep drawing. On the hydraulic side, a shoulder is formed on this piston during manufacture, via which an O-ring is inserted. The thus used over a shoulder O-ring is held captive in the process of the piston in both directions of movement.
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß ist eine Speichereinrichtung einer Fahrzeugbremsanlage mit einem Speicherkolben und einem daran angeordneten Dichtring geschaffen, bei der der Dichtring an einem als Rohling hergestellten Speicherkolben mittels einer Umformung ortsfest gehalten ist. According to the invention a storage device of a vehicle brake system is provided with a storage piston and a sealing ring arranged thereon, in which the sealing ring is held stationary by means of a deformation on a storage piston produced as a blank.
Mit der erfindungsgemäßen Lösung kann die Menge an für die Herstellung des Kolbens erforderlichem Material reduziert werden. Ferner ist beim Montieren des zugehörigen Dichtrings die Gefahr eines Verdrehens eines als O-Ring gestalteten Dichtrings vermieden. Dieser Fehler ergab sich teilweise bei bestehenden Herstellungsverfahren, bei denen der Dichtring über eine Schulter zu montieren war. Darüber hinaus kann das Werkzeug zum Montieren des Dichtrings am erfindungsgemäßen Speicherkolben und auch die Werkzeugform für die Herstellung des Speicherkolbens selbst vereinfacht werden. With the solution according to the invention, the amount of material required for the production of the piston can be reduced. Furthermore, the risk of twisting a designed as an O-ring sealing ring is avoided when mounting the associated sealing ring. This error was partially due to existing manufacturing processes where the seal was to be mounted over one shoulder. In addition, the tool for mounting the sealing ring on the accumulator piston according to the invention and also the mold for the production of the accumulator piston itself can be simplified.
Die erfindungsgemäße Umformung sieht ein plastisches Umformen des Materials des zuvor hergestellten Kolbens vor. Die Umformung erfolgt insbesondere unter Wärmeeintrag als Warmumformung. Mit diesem Umformverfahren kann eine über die Lebensdauer der Speichereinrichtung hinweg dauerhaft stabile Anordnung des zugehörigen Dichtrings gewährleistet werden. The forming according to the invention provides for a plastic forming of the material of the previously produced piston. The deformation takes place in particular under heat input as hot forming. With this forming process, a permanently stable arrangement of the associated sealing ring over the life of the storage device can be ensured.
Bei der erfindungsgemäßen Speichereinrichtung ist besonders bevorzugt der Rohling als Spritzteil hergestellt. Dieses Spritzteil kann mit einer vergleichsweise einfachen Formgebung in einer Spritzgussform hergestellt werden, die insbesondere keine Hinterschnitte aufweisen muss. Das Spritzteil kann daher auch besonders einfach aus der Spritzgussform herausgelöst werden. In the storage device according to the invention, the blank is particularly preferably produced as a molded part. This molded part can be produced with a comparatively simple shape in an injection mold, which in particular does not have to have undercuts. The molded part can therefore be removed from the injection mold particularly easily.
Der Rohling ist ferner vorzugsweise mit einer axial gerichteten Umformungsgeometrie zum Ausbilden der späteren Umformung versehen. Die zunächst radial gerichtete Umformungsgeometrie kann mit einer in axialer Richtung des Speicherkolbens schließenden und öffnenden Spritzgussform in kostengünstiger Weise hergestellt werden. The blank is further preferably provided with an axially directed forming geometry for forming the later forming. The initially radially directed deformation geometry can be produced in a cost-effective manner with an injection mold that closes and opens in the axial direction of the storage piston.
Der Rohling ist vorzugsweise rund gestaltet und die Umformungsgeometrie erstreckt sich über den gesamten Umfang des Rohlings. Mit dieser vollständig umlaufenden Umformungsgeometrie ist der Dichtring über seinen gesamten Umfang hinweg am Speicherkolben gleichmäßig zurückgehalten. Alternativ erstreckt sich die Umformungsgeometrie nur segmentweise über den Umfang des Rohlings. The blank is preferably designed round and the Umformungsgeometrie extends over the entire circumference of the blank. With this completely circumferential deformation geometry, the sealing ring is retained uniformly over its entire circumference on the accumulator piston. Alternatively, the deformation geometry extends only in segments over the circumference of the blank.
Die Umformungsgeometrie ist ferner vorzugsweise an einem Boden des Rohlings ausgebildet. Die sich dort befindende Umformungsgeometrie kann nach einem Montieren des Dichtrings am Speicherkolben mit dem gleichen Werkzeug hergestellt worden, mit dem zuvor der Dichtring montiert wurde. Es können also beide Arbeitschritte, die Dichtringmontage und die Umformung mit einem Arbeitsgang ausgeführt werden. Dieser Arbeitsgang ist darüber hinaus gut zu automatisieren, weil er undirektional gestaltet werden kann. The forming geometry is further preferably formed on a bottom of the blank. The forming geometry located there can be made after mounting the sealing ring on the accumulator piston with the same tool with which the sealing ring was previously mounted. So it can be done with a single operation both steps, sealing ring assembly and forming. In addition, this operation is easy to automate because it can be designed to be unidirectional.
Vorzugsweise ist ferner bei der erfindungsgemäßen Speichereinrichtung der Rohling mit einer Führungsfläche zum Aufschieben des Dichtrings vor dem Herstellen der Warmumformung gestaltet. Die derartige Führungsfläche unterstützt die Führung des Dichtrings während der Montage und stellt insbesondere sicher, dass der Dichtring am Speicherkolben in der ordnungsgemäßen Positionierung angeordnet wird. Furthermore, in the case of the storage device according to the invention, the blank is preferably designed with a guide surface for pushing on the sealing ring prior to producing the hot forming. The guide surface of this type assists in the guidance of the sealing ring during assembly and, in particular, ensures that the sealing ring is arranged on the accumulator piston in the proper positioning.
Die Führungsfläche ist bevorzugt als rein axial gerichtete Fläche gestaltet. Auf die derartige Fläche kann der Dichtring sehr vorteilhaft automatisieret montiert werden. The guide surface is preferably designed as a purely axially directed surface. On the surface of this type, the sealing ring can be mounted very advantageously automatically.
Der Rohling ist darüber hinaus vorzugsweise rund gestaltet und die Führungsfläche erstreckt sich über den gesamten Umfang des Rohlings. Mit der derartigen Führungsfläche ist der Dichtring vollumfänglich geführt, so dass die Gefahr einer Fehlpositionierung des Dichtrings während der Montage minimiert ist. The blank is also preferably designed round and the guide surface extends over the entire circumference of the blank. With the guide surface of this type, the sealing ring is guided in its entirety, so that the risk of incorrect positioning of the sealing ring during assembly is minimized.
Der Dichtring ist besonders bevorzugt als so genannter O-Ring mit einer kreisrunden Querschnittfläche gestaltet. Derartige Dichtringe werden in großer Variantenvielfalt als Massenware hergestellt und können entsprechend sehr preisgünstig angeboten werden. Mit der erfindungsgemäßen Lösung ist es möglich selbst derartig einfache Dichtringe mit einer sehr hohen Positioniergenauigkeit zu platzieren und dabei auch die erforderliche Verliersicherheit zu gewährleisten. The sealing ring is particularly preferably designed as a so-called O-ring with a circular cross-sectional area. Such seals are made in a large variety of variants as a mass-produced and can be offered very reasonably priced. With the solution according to the invention, it is possible to place even such simple sealing rings with a very high positioning accuracy while also ensuring the required captive security.
Die Erfindung ist schließlich auch auf eine Verwendung einer derartigen erfindungsgemäßen Speichereinrichtung an einem Hydraulikaggregat einer Fahrzeugbremsanlage gerichtet. Die erfindungsgemäße Lösung eignet sich besonders für eine automatisierte Fertigung, wie sie aufgrund der hohen Stückzahlen für den Bereich der Fahrzeugtechnologie unerlässlich ist. Finally, the invention is also directed to a use of such a memory device according to the invention on a hydraulic unit of a vehicle brake system. The solution according to the invention is particularly suitable for automated production, as it is essential because of the high quantities for the field of vehicle technology.
Nachfolgend wird ein Ausführungsbeispiel der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt: An exemplary embodiment of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. It shows:
In
Die Speichereinrichtung
Der Speicherkolben
In die Nut
In den
Der Speicherdeckel
Alternativ kann zum Anbringen des Speicherdeckels
Der Speicherkolben
Der Rohling
Die Führungsfläche
Auf diese Weise ist mit der Ausformung des Überstands
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011089987A DE102011089987A1 (en) | 2011-12-27 | 2011-12-27 | Storage device for intermediately storing returned brake fluid from wheel brake cylinders in hydraulic assembly of passenger car brake system, has sealing ring fixedly held at storage piston by deformation, where piston is produced as blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011089987A DE102011089987A1 (en) | 2011-12-27 | 2011-12-27 | Storage device for intermediately storing returned brake fluid from wheel brake cylinders in hydraulic assembly of passenger car brake system, has sealing ring fixedly held at storage piston by deformation, where piston is produced as blank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102011089987A1 true DE102011089987A1 (en) | 2013-06-27 |
Family
ID=48575436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102011089987A Pending DE102011089987A1 (en) | 2011-12-27 | 2011-12-27 | Storage device for intermediately storing returned brake fluid from wheel brake cylinders in hydraulic assembly of passenger car brake system, has sealing ring fixedly held at storage piston by deformation, where piston is produced as blank |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102011089987A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019029986A1 (en) | 2017-08-10 | 2019-02-14 | Robert Bosch Gmbh | PRESSURE MEMORY STORAGE, IN PARTICULAR FOR STORING BRAKE FLUID IN A BRAKING CIRCUIT OF AN ELECTRONICALLY SLIP-CONTROLLED VEHICLE BRAKING SYSTEM |
-
2011
- 2011-12-27 DE DE102011089987A patent/DE102011089987A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019029986A1 (en) | 2017-08-10 | 2019-02-14 | Robert Bosch Gmbh | PRESSURE MEMORY STORAGE, IN PARTICULAR FOR STORING BRAKE FLUID IN A BRAKING CIRCUIT OF AN ELECTRONICALLY SLIP-CONTROLLED VEHICLE BRAKING SYSTEM |
| DE102017213915A1 (en) | 2017-08-10 | 2019-02-14 | Robert Bosch Gmbh | Pressure fluid accumulator, in particular for storing brake fluid in a brake circuit of an electronically slip-controllable vehicle brake system |
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| R012 | Request for examination validly filed | ||
| R016 | Response to examination communication |