DE202005002954U1 - Piston pump for regulated automobile braking system has brake fluid layer acting as lubricant between each piston and enclosing guide sleeve - Google Patents
Piston pump for regulated automobile braking system has brake fluid layer acting as lubricant between each piston and enclosing guide sleeve Download PDFInfo
- Publication number
- DE202005002954U1 DE202005002954U1 DE200520002954 DE202005002954U DE202005002954U1 DE 202005002954 U1 DE202005002954 U1 DE 202005002954U1 DE 200520002954 DE200520002954 DE 200520002954 DE 202005002954 U DE202005002954 U DE 202005002954U DE 202005002954 U1 DE202005002954 U1 DE 202005002954U1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- piston pump
- pump according
- protection layer
- wear protection
- 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.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 10
- 239000000314 lubricant Substances 0.000 title claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 title claims description 3
- 239000000463 material Substances 0.000 claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 229910000906 Bronze Inorganic materials 0.000 claims abstract description 4
- 239000010974 bronze Substances 0.000 claims abstract description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002347 wear-protection layer Substances 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000001771 vacuum deposition Methods 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 239000012778 molding material Substances 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005382 thermal cycling Methods 0.000 description 2
- 238000007743 anodising Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- 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
- B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4031—Pump units characterised by their construction or mounting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0439—Supporting or guiding means for the pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/12—Coating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Details Of Reciprocating Pumps (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Die Erfindung betrifft eine Kolbenpumpe zum Fördern von Druckmittel in wenigstens eine Fahrzeugbremse, in einen Hauptzylinder, in einen Druckmittelbehälter, oder in einen Druckmittelspeicher, einer geregelten Fahrzeugbremsanlage, wobei ein Kolben in einer Stufenbohrung eines Aufnahmekörpers abgedichtet sowie bewegbar geführt angeordnet ist, und zur Führung des Kolbens wenigstens eine Buchse vorgesehen ist.The The invention relates to a piston pump for conveying pressure medium in at least a vehicle brake, in a master cylinder, in a pressure medium container, or in a pressure fluid accumulator, a regulated vehicle brake system, wherein a piston is sealed in a stepped bore of a receiving body as well as movably guided is arranged, and to guide the piston is provided at least one socket.
Eine
gattungsgemäße Kolbenpumpe
ist beispielsweise aus der
Bekanntlich ermöglichen PTFE-Kunststoffe wegen deren Antihaft-Eigenschaften einen besonders niedrigen Reibwert und zwar völlig ohne gesonderten Schmierstoff, also trocken, und ferner weitestgehend unabhängig von dem jeweiligen anderen Reibpartner. Ein Festsetzen, Festbacken oder Verklemmen der Reibpartner wird durch die Antihaft-Eigenschaften des PTFE zuverlässig verhindert. Problematisch ist das Reibungsverhalten bei Kälte, weil der PTFE-Kunststoffwerkstoff im Zusammenhang mit Stahlkolben zum Klemmen und folglich zu erhöhtem Verschleiß neigt.generally known enable PTFE plastics because of their non-stick properties a special low coefficient of friction and indeed completely without separate lubricant, so dry, and also largely independently from the respective other friction partner. A setting, caking or jamming of the friction partners is due to the non-stick properties of the PTFE reliable prevented. The problem is the friction behavior in the cold, because of PTFE plastic material in connection with steel pistons for clamping and thus tends to increase wear.
Der Erfindung liegt die Aufgabe zu Grunde, ein Tribosystem vorzuschlagen, welches ein Festsetzen oder Verklemmen der beteiligten Reibpartner bei einer gattungsgemäßen Pumpe zuverlässig verhindert. Des weiteren soll eine Basis für eine baukastenartig an verschiedene Randbedingungen anpassbare Konstruktion geschaffen werden.Of the The invention is based on the object of proposing a tribosystem, which is a setting or jamming of the friction partners involved in a generic pump reliable prevented. Furthermore, a base for a modular to different Constraints customizable construction can be created.
Die Aufgabe wird gelöst, indem ein Tribosystem aufgezeigt wird, wobei der Kolben aus Stahlwerkstoff ausgebildet ist, wobei die Buchse aus einem anderen, verschleißresistenten Lagerwerkstoff ausgebildet ist, und dass zwischen Kolben und Buchse zumindest in geringem Umfang Bremsflüssigkeit als Schmierstoff wirksam ist. Die Erfindung beruht mit anderen Worten im wesentlichen darauf, zur exzenterseitigen Kolbenabstützung durch die angegebenen Reibpartner und unter Ausnutzung der Schmiereigenschaft von Bremsflüssigkeit die gewünschten Eigenschaften zu erzielen. Dabei dient die Bremsflüssigkeit ferner zur Kühlung zwischen Grenzflächen der Reibpartner.The Task is solved by showing a tribosystem, wherein the piston is made of steel material is formed, wherein the bush of a different, wear-resistant Bearing material is formed, and that between the piston and bushing at least to a small extent brake fluid as a lubricant effective is. In other words, the invention is essentially based on for eccentric piston support by the specified friction partners and taking advantage of the lubricating property of brake fluid the desired properties to achieve. The brake fluid also serves for cooling between Interfaces of the Friction partners.
Nach einer vorteilhaften Ausführungsform der Erfindung ist die Buchse aus Aluminiumwerkstoff ausgebildet, was in Verbindung mit dem Stahlwerkstoff der Kolben sowie der schmierenden Bremsflüssigkeit eine Reibpaarung mit geringem Verschleiß ergibt. Wenn der Aufnahmekörper (Pumpengehäuse) in Übereinstimmung mit der Buchse aus Aluminiumwerkstoff ausgebildet ist, ergibt sich der Vorteil, dass beide Bauteile übereinstimmende thermische Längenausdehnungskoeffizienten aufweisen. Dadurch ist eine dauerhafte und auch statisch bestimmte Anordnung der Buchse – selbst unter Temperaturwechselbeanspruchung – gegeben.To an advantageous embodiment of the Invention, the bush is formed of aluminum material, which in connection with the steel material of the pistons as well as the lubricating ones brake fluid a friction pairing with low wear results. If the receiving body (pump housing) in accordance formed with the bush of aluminum material, results the advantage that both components match thermal Coefficient of linear expansion exhibit. This is a permanent and also statically determined Arrangement of the socket - itself under thermal cycling - given.
Ähnlich vorteilhaft ist eine Kombination unter Verwendung von Bronzewerkstoff für die Buchse. Prinzipiell ist es auch denkbar, die Buchse aus glasfaserverstärktem Spritzgusswerkstoff auszubilden.Similarly advantageous is a combination using bronze material for the socket. in principle it is also conceivable, the bushing made of glass fiber reinforced injection molding material train.
Gemäß einer anderen Variante der Erfindung weist die Buchse eine Lauffläche auf, welche mit einer dünnen Verschleißschutzschicht versehen ist. Dadurch wird der Vorteil erzielt, dass die Lauffläche der Buchse ganz nach den Reibungs- und Verschleißanforderungen modelliert werden kann. Der Grundwerkstoff der Buchse kann dagegen so ausgewählt werden, dass ein optimierten Sitz im Aufnahmekörper erzielt wird. In diesem Zusammenhang wird bevorzugt eine harte Verschleißschutzschicht mit einem verhältnismässig duktilen Grundwerkstoff kombiniert, welcher ohne weiteres – insbesondere ohne besondere Einschrumpfprozess unter Tieftemperatur – in eine Bohrung des Aufnahmekörpers eingepresst werden kann.According to one In another variant of the invention, the bush has a tread, which with a thin one Wear protection layer is provided. This provides the advantage that the tread of the Bush can be modeled according to the friction and wear requirements can. The base material of the socket, on the other hand, can be selected that an optimized seat in the receiving body is achieved. In this Correlation is preferably a hard wear protection layer with a relatively ductile Base material combined, which readily - especially without special shrink process at low temperature - in one Bore of the receiving body can be pressed.
Es werden bevorzugt Verschleißschutzschichten mit einer Dicke zwischen etwa 4 bis 40μm vorgesehen. Im einfachsten Fall handelt es sich um eine Verschleißschutzschicht welche mit Hilfe von elektrochemischen Eloxalverfahren abgeschieden wird. Für besondere Schichtzusammensetzungen kann es sich jedoch auch anbieten, die Verschleißschutzschicht mittels Vakuumbeschichtungsverfahren aufzubringen.It are preferred wear protection layers provided with a thickness between about 4 to 40μm. In the simplest Case is a wear protection layer which with the help is deposited by electrochemical anodizing. For special However, coating compositions may also be available which Wear protection layer Apply by vacuum coating method.
Weitere Einzelheiten der Erfindung gehen aus nachfolgender Beschreibung anhand der Zeichnung hervor. In der Zeichnung zeigt:Further Details of the invention will become apparent from the following description with reference to the drawing. In the drawing shows:
Die
Der
Elektromotor
Nachstehend
wird nur die exzenterseitige Abstützung der Kolben
Bei
der bevorzugten Ausführungsform
ist der Aufnahmekörper
Einzelheiten
der ringförmig
gestalteten Buchse
Generell
kann für
die Herstellung der Buchse
Alternativ
ist es für
besonders dauerfeste Aggregate denkbar, den Aufnahmekörper
Zur
Verbesserung des Verschleißverhaltens weist
die Buchse
Nach
einer Abwandlung der Erfindung ist die Verschleißschutzschicht
Generell
ist es von Vorteil, wenn die Verschleißschutzschicht
Aus
- 11
- Aggregataggregate
- 22
- Elektromotorelectric motor
- 33
- Aufnahmekörperreceiving body
- 44
- Kolbenpumpepiston pump
- 55
- Wellewave
- 66
- Kolbenpiston
- 77
- Kolbenpiston
- 88th
- Stufenbohrungstepped bore
- 99
- Stufenbohrungstepped bore
- 1010
- BuchseRifle
- 1111
- BuchseRifle
- 1212
- Fasechamfer
- 1313
- Fasechamfer
- 1414
- VerschleißschutzschichtWear protection layer
- 1515
- BasisBase
- 1616
- Führungsteilguide part
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200520002954 DE202005002954U1 (en) | 2005-02-23 | 2005-02-23 | Piston pump for regulated automobile braking system has brake fluid layer acting as lubricant between each piston and enclosing guide sleeve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200520002954 DE202005002954U1 (en) | 2005-02-23 | 2005-02-23 | Piston pump for regulated automobile braking system has brake fluid layer acting as lubricant between each piston and enclosing guide sleeve |
Publications (1)
Publication Number | Publication Date |
---|---|
DE202005002954U1 true DE202005002954U1 (en) | 2005-05-12 |
Family
ID=34585676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200520002954 Expired - Lifetime DE202005002954U1 (en) | 2005-02-23 | 2005-02-23 | Piston pump for regulated automobile braking system has brake fluid layer acting as lubricant between each piston and enclosing guide sleeve |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE202005002954U1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008052856A1 (en) * | 2006-11-02 | 2008-05-08 | Robert Bosch Gmbh | Piston pump |
DE102008027094A1 (en) * | 2008-06-06 | 2009-12-10 | Lucas Automotive Gmbh | Housing block for use in pump assembly of e.g. vehicle brake system, has hollow region staying in fluid connection with chamber, and chamber wall selectively surface treated such that hollow region is excluded from surface treatment |
EP2182211A3 (en) * | 2008-11-04 | 2010-06-23 | Robert Bosch GmbH | Camshaft drive with bushing optimised against axial slipping |
FR2963953A1 (en) * | 2010-08-19 | 2012-02-24 | Bosch Gmbh Robert | PISTON PUMP AND METHOD OF MAKING SUCH A PUMP |
WO2013017343A1 (en) * | 2011-08-02 | 2013-02-07 | Continental Teves Ag & Co. Ohg | Piston pump |
EP2554445A3 (en) * | 2011-08-01 | 2015-03-11 | Robert Bosch Gmbh | Guide ring of a pump element of a vehicle brake system |
-
2005
- 2005-02-23 DE DE200520002954 patent/DE202005002954U1/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008052856A1 (en) * | 2006-11-02 | 2008-05-08 | Robert Bosch Gmbh | Piston pump |
US8241020B2 (en) | 2006-11-02 | 2012-08-14 | Robert Bosch Gmbh | Piston pump |
CN101528516B (en) * | 2006-11-02 | 2013-03-27 | 罗伯特.博世有限公司 | Piston pump |
DE102008027094A1 (en) * | 2008-06-06 | 2009-12-10 | Lucas Automotive Gmbh | Housing block for use in pump assembly of e.g. vehicle brake system, has hollow region staying in fluid connection with chamber, and chamber wall selectively surface treated such that hollow region is excluded from surface treatment |
EP2182211A3 (en) * | 2008-11-04 | 2010-06-23 | Robert Bosch GmbH | Camshaft drive with bushing optimised against axial slipping |
FR2963953A1 (en) * | 2010-08-19 | 2012-02-24 | Bosch Gmbh Robert | PISTON PUMP AND METHOD OF MAKING SUCH A PUMP |
EP2554445A3 (en) * | 2011-08-01 | 2015-03-11 | Robert Bosch Gmbh | Guide ring of a pump element of a vehicle brake system |
WO2013017343A1 (en) * | 2011-08-02 | 2013-02-07 | Continental Teves Ag & Co. Ohg | Piston pump |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 20050616 |
|
R163 | Identified publications notified |
Effective date: 20050510 |
|
R150 | Term of protection extended to 6 years |
Effective date: 20080313 |
|
R151 | Term of protection extended to 8 years |
Effective date: 20110316 |
|
R152 | Term of protection extended to 10 years | ||
R152 | Term of protection extended to 10 years |
Effective date: 20130312 |
|
R071 | Expiry of right | ||
R071 | Expiry of right |