DE10300774A1 - Radial piston pump has thrust bearing installed between end face of shaft journal and base, with outer race of radial bearing constructed as closed needle bush formed in non-cutting process with base - Google Patents
Radial piston pump has thrust bearing installed between end face of shaft journal and base, with outer race of radial bearing constructed as closed needle bush formed in non-cutting process with base Download PDFInfo
- Publication number
- DE10300774A1 DE10300774A1 DE2003100774 DE10300774A DE10300774A1 DE 10300774 A1 DE10300774 A1 DE 10300774A1 DE 2003100774 DE2003100774 DE 2003100774 DE 10300774 A DE10300774 A DE 10300774A DE 10300774 A1 DE10300774 A1 DE 10300774A1
- Authority
- DE
- Germany
- Prior art keywords
- bearing
- piston pump
- needle
- radial piston
- radial
- 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.)
- Ceased
Links
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/30—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for axial load mainly
- F16C19/32—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for axial load mainly for supporting the end face of a shaft or other member, e.g. footstep bearings
-
- 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
- F04B1/0413—Cams
-
- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/381—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with at least one row for radial load in combination with at least one row for axial load
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/42—Pumps with cylinders or pistons
Abstract
Description
Die Erfindung betrifft eine Radialkolbenpumpe mit einer rotierenden Pumpenwelle, deren Endabschnitt einen exzentrisch zu einer Längsmittelachse der Pumpenwelle verlaufenden Wellenzapfen aufweist, wobei auf dem Wellenzapfen ein Radiallager angeordnet ist, dessen Außenring mit einem Boden verschlossen ist und Pumpenplunger beaufschlagt, die sternenförmig in einem Pumpengehäuse radial zur Pumpenwelle angeordnet sind.The invention relates to a radial piston pump with a rotating pump shaft, the end section of which is eccentric to a longitudinal central axis the pump shaft extending shaft journal, wherein on the Shaft journal a radial bearing is arranged, the outer ring is closed with a bottom and acts on pump plunger, the star-shaped radial in a pump housing are arranged to the pump shaft.
Bei hohen Radiallasten durch die Pumpenplunger entsteht im Exzenterlager in Richtung Motor, d.h. in Richtung Pumpenwelle, ein Axialschub, der zum Verschleiß der Exzenterlageranordnung führen kann. Dieser Verschleiß entsteht durch Anlage des Bodens der Nadelbüchse an der Stirnseite des exzentrischen Wellenzapfens. Dabei entsteht metallischer Abrieb, der in das Schmierfett des Exzenterlagers gelangt und dessen Konsistenz verändert, d.h., dieses austrocknet. Die Folge ist eine Verkürzung der Lebensdauer des Exzenterlagers.With high radial loads by the Pump plunger occurs in the eccentric bearing towards the motor, i.e. in the direction of the pump shaft, an axial thrust that wears the eccentric bearing arrangement can lead. This wear occurs by placing the bottom of the needle bush on the front of the eccentric shaft journal. This creates metallic abrasion, which gets into the grease of the eccentric bearing and its consistency changed i.e. this dries out. The consequence is a shortening of the lifespan of the eccentric bearing.
Der Erfindung liegt daher die Aufgabe zugrunde, an einer Radialkolbenpumpe der gattungsgemäßen Art die vorstehend geschilderten Nachteile zu vermeiden und eine Wälzlageranordnung auf dem exzentrischen Wellenabschnitt zu schaffen, bei der auftretende Axialkräfte verschleißfrei aufgenommen werden.The invention is therefore the object based on a radial piston pump of the generic type to avoid the disadvantages described above and a rolling bearing arrangement to create on the eccentric shaft section at which occurring axial forces wear be included.
Erfindungsgemäß wird diese Aufgabe nach dem kennzeichnenden Teil von Anspruch 1 in Verbindung mit dessen Oberbegriff dadurch gelöst, dass zwischen einer Stirnseite des Wellenzapfens und dem Boden ein Axialwälzlager angeordnet ist.According to the invention, this task is performed after characterizing part of claim 1 in connection with its preamble solved by that between an end face of the shaft journal and the bottom thrust roller bearing is arranged.
Durch dieses zwischengeschaltete Axialwälzlager wird die gleitende Reibung zwischen der Stirnseite des Wellenzapfens und dem Boden durch rollende Reibung ersetzt. Axiale Kräfte werden auf diese Art mit einem geringeren Reibungsverlust und ohne metallischen Abrieb sicher aufgenommen, so dass die Lebensdauer der Exzenterlagerung erhöht werden kann. Anders ausgedrückt, das Exzenterlager ist im Sinne der Erfindung als ein kombiniertes Radial-Axiallager ausgebildet, dessen Radialteil die radial wirkenden Kräfte und dessen Axialteil die axial wirkenden Kräfte der Pumpenplunger aufnehmen.Through this intermediary thrust roller bearing becomes the sliding friction between the face of the shaft journal and replaced the floor with rolling friction. Axial forces are in this way with less friction loss and without metallic Abrasion is safely absorbed, so that the life of the eccentric bearing increase can. Expressed differently, the eccentric bearing is designed in the sense of the invention as a combined radial-axial bearing, the radial part of the radially acting forces and the axial part of the axial forces the pump plunger.
Vorteilhafte Weiterbildungen der
Erfindung sind in den Unteransprüchen
Eine vorteilhafte Variante der Erfindung geht aus Anspruch 2 hervor. Danach soll der Außenring des Radiallagers als eine spanlos geformte mit einem Boden verschlossene Nadelbüchse ausgebildet sein, deren in einem Käfig geführte Lagernadeln auf einer Mantelfläche des Wellenzapfens abrollen, wobei zwischen der Stirnseite des Käfigs und dem Boden das Axialwälzlager angeordnet ist.An advantageous variant of the invention emerges from claim 2. After that, the outer ring of the radial bearing is said to be a chipless shaped needle sleeve with a bottom is formed be whose in a cage guided Bearing needles on a lateral surface roll the shaft journal, whereby between the front of the cage and the axial rolling bearing is arranged.
Nach den Ansprüchen 3 und 4 vorgesehen, dass das zwischengeschaltete Axialwälzlager entweder ein Nadellager oder ein Kugellager ist, wobei beide alternative Möglichkeiten gleichberechtigt nebeneinander stehen.According to claims 3 and 4 provided that the intermediate axial roller bearing is either a needle bearing or a ball bearing, both of which are alternative possibilities stand side by side on an equal footing.
Eine besonders vorteilhafte Ausführung des Axialwälzlagers geht aus Anspruch 5 hervor. Danach soll zwischen dem Käfig und dem Boden eine dem Durchmesser der Nadelbüchse angepaßte einzelne Lagernadel angeordnet sein, die in ihrem Durchmesser eine Abstufung aufweist und auf einer Rotationsachse einen Lagermittelpunkt umkreist. Die Abstufung der Lagernadel sorgt dafür, dass ein Teil von deren Mantelfläche den Kontakt mit den zugehörigen Laufbahnen verliert. Auf diese Weise überwiegt die Rollreibung, so dass ein Abwälzen der Lagernadel erst überhaupt ermöglicht wird. Bei einer nicht abgestuften Lagernadel würden nämlich deren untere Hälfte in Drehrichtung und deren obere Hälfte entgegengesetzt zur Drehrichtung rotieren, so dass zwei gleich große einander entgegen gerichtete Drehmomente deren Rotation verhindern würden.A particularly advantageous design of the axial roller bearing emerges from claim 5. After that, between the cage and a single bearing needle adapted to the diameter of the needle bushing is arranged on the bottom be, which has a gradation in diameter and on one Rotation axis orbits a bearing center. The gradation of the Bearing needle ensures that part of their outer surface contact with the relevant careers loses. In this way it predominates the rolling friction, so that a rolling the bearing needle in the first place allows becomes. In the case of a non-stepped bearing needle, the lower half would namely in Direction of rotation and its upper half rotate counter to the direction of rotation, so that two equal size each other opposing torques would prevent their rotation.
Nach einem weiteren zusätzlichen Merkmal gemäß Anspruch 6 ist vorgesehen, dass die Stirnseiten der Lagernadel kalottenförmig ausgebildet sein sollen. Durch diese Abstimmung der Stirnflächen der Lagernadel mit der Aufnahmebohrung der Nadelbüchse entsteht zwischen Stirnfläche und Aufnahmebohrung ein keilförmiger Spalt, der mit Schmiermittel gefüllt die Reibung zwischen Lagernadel und Wandung der Nadelbüchse verringert.After another additional Feature according to claim 6 it is provided that the end faces of the bearing needle are dome-shaped should be. By this coordination of the end faces of the bearing needle with the Location bore of the needle bush arises between the end face and receiving bore a wedge-shaped Gap filled with lubricant the friction between the bearing needle and the wall of the needle sleeve is reduced.
Nach einem weiteren anderen zusätzlichen Merkmal gemäß Anspruch 7 soll der Käfig an seinem in Richtung Axiallager weisenden Ende mit einem Boden verschlossen sein. Durch diesen Boden des Käfigs wird der Fettraum der einzelnen Lagernadel abgedichtet.According to another additional feature according to claim 7 is the cage at its end pointing towards the axial bearing with a bottom to be introverted. Through this bottom of the cage the fat space becomes the single bearing needle sealed.
Aus Anspruch 8 geht hervor, dass der Boden der Nadelbüchse mit einer zentrischen Freistellung versehen ist. Diese zentrische Freistellung sorgt dafür, dass nochmals eine Reibungsverminderung eintritt, weil der Kontakt der einzelnen Lagernadel mit der Bodenfläche nochmals verringert ist.It is apparent from claim 8 that the bottom of the needle box is provided with a central exemption. This centric Exemption ensures that there is another reduction in friction because of the contact the individual bearing needle with the bottom surface is reduced again.
Eine andere vorteilhafte Weiterentwicklung der Erfindung ist in Anspruch 9 beschrieben. Danach ist vorgesehen, dass zwischen dem Käfig und dem Boden der Nadelbüchse zwei auf einer gemeinsamen Rotationsachse liegende Lagernadeln angeordnet sind, die einen Lagermittelpunkt umkreisen.Another advantageous development of the Invention is described in claim 9. After that it is provided that between the cage and the bottom of the needle box two bearing needles located on a common axis of rotation are orbiting a center of the camp.
Ist das erfindungsgemäß zwischen Stirnseite des Käfigs und dem Boden der Nadelbüchse angeordnete Axialwälzlager als ein Kugellager ausgebildet, so sind verschiedene Varianten denkbar.According to the invention between Front of the cage and the bottom of the needle box arranged axial rolling bearings designed as a ball bearing, different variants are conceivable.
Nach Anspruch 10 ist in diesem Fall vorgesehen, dass der Boden der Nadelbüchse wenigstens mit drei in Umfangsrichtung gleichmäßig voneinander beabstandeten kreisförmigen Kugellaufbahnen versehen ist, in denen je eine Lagerkugel angeordnet ist, deren andere Laufbahnen von einem geschlossenen Boden des Käfigs gebildet sind.According to claim 10 it is provided in this case that the bottom of the needle bushing is provided with at least three circular ball raceways evenly spaced apart in the circumferential direction, in each of which a bearing ball is arranged whose other raceways are formed by a closed bottom of the cage.
Eine andere Variante eines Axialwälzlagers in Kugelform geht aus Anspruch 11 hervor. Danach ist vorgesehen, dass der Boden der Nadelbüchse mit einer eine Vielzahl von Lagerkugeln aufnehmenden zentrisch angeordneten Kugelaufnahmerille versehen ist, deren andere Laufbahnen von einer Scheibe gebildet sind.Another variant of a thrust roller bearing in Spherical shape emerges from claim 11. After that it is provided that the bottom of the needle box with a centrally arranged accommodating a plurality of bearing balls Ball receiving groove is provided, the other raceways of one Disk are formed.
Nach Anspruch 12 ist es auch möglich, dass der Boden der Nadelbüchse nahezu über seine gesamte Fläche mit einer Vielzahl von Lagerkugeln bedeckt ist, deren andere Laufbahnen von einer Scheibe gebildet sind.According to claim 12, it is also possible that the Bottom of the needle box almost over its entire area is covered with a large number of bearing balls, the other raceways of which are formed by a disc.
Schließlich sollen nach einem letzten erfindungsgemäßen Merkmal gemäß Anspruch 13 die Wälzkörper des Axiallagers in einem Käfig geführt sein.After all, after a last one feature according to the invention according to claim 13 the rolling elements of the Thrust bearings in a cage be led.
Die Erfindung wird an nachstehenden Ausführungsbeispielen näher erläutert.The invention will be as follows embodiments explained in more detail.
Kurze Beschreibung der ZeichnungenShort description of the drawings
Es zeigen:Show it:
und
Ausführliche Beschreibung der ZeichnungenFull Description of the drawings
Der in
Wie die
In
Der in
Der in den
In den
- 11
- Pumpenwellepump shaft
- 22
- Kugellagerball-bearing
- 33
- Gehäusecasing
- 44
- Wellenzapfenshaft journal
- 55
- Radiallagerradial bearings
- 66
- Nadelbüchseneedlecase
- 77
- Bodenground
- 88th
- Erhebungsurvey
- 99
- Bordshelf
- 1010
- KäfigCage
- 10.110.1
- Bodenground
- 1111
- Lagernadelbearing needle
- 1212
- Pumpenplungerpump plungers
- 1313
- Lagernadelbearing needle
- 1414
- Rotationsachseaxis of rotation
- 1515
- LagermittelpunktBearing center
- 1616
- Freistellungexemption
- 1717
- Lagernadelbearing needle
- 1818
- Lagernadelbearing needle
- 1919
- KäfigCage
- 2020
- KugellaufbahnBall track
- 2121
- Lagerkugelbearing ball
- 2222
- KugelaufnahmerilleBall receiving groove
- 2323
- Lagerkugelbearing ball
- 2424
- Scheibedisc
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003100774 DE10300774A1 (en) | 2003-01-11 | 2003-01-11 | Radial piston pump has thrust bearing installed between end face of shaft journal and base, with outer race of radial bearing constructed as closed needle bush formed in non-cutting process with base |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003100774 DE10300774A1 (en) | 2003-01-11 | 2003-01-11 | Radial piston pump has thrust bearing installed between end face of shaft journal and base, with outer race of radial bearing constructed as closed needle bush formed in non-cutting process with base |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10300774A1 true DE10300774A1 (en) | 2004-07-22 |
Family
ID=32519839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003100774 Ceased DE10300774A1 (en) | 2003-01-11 | 2003-01-11 | Radial piston pump has thrust bearing installed between end face of shaft journal and base, with outer race of radial bearing constructed as closed needle bush formed in non-cutting process with base |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10300774A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006015897A1 (en) * | 2005-12-10 | 2007-06-14 | Continental Teves Ag & Co. Ohg | Electric motor pump unit, has channels provided for transporting leakage fluid from crank case into spatial environment, and needle bush with ring shaped sealing unit, which closes gap within shaft passage |
DE102007015687A1 (en) * | 2007-03-31 | 2008-10-02 | Schaeffler Kg | Radial rolling bearing for an eccentric drive, eccentric drive for a radial piston pump and anti-lock braking system with the eccentric drive |
DE102016202276B3 (en) * | 2016-02-15 | 2017-04-06 | Schaeffler Technologies AG & Co. KG | Eccentric arrangement in particular for a pump of an ABS system and pump for the ABS system |
US20190234454A1 (en) * | 2016-10-12 | 2019-08-01 | Hitachi Automotive Systems, Ltd. | Pump Apparatus and Brake Apparatus |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT310510B (en) * | 1971-02-11 | 1973-10-10 | Pitner Alfred | Combined radial-axial bearing |
DE4303885A1 (en) * | 1993-02-10 | 1994-08-11 | Schaeffler Waelzlager Kg | Axial bearing |
DE19711557A1 (en) * | 1997-03-20 | 1998-09-24 | Schaeffler Waelzlager Ohg | Radial piston pump |
-
2003
- 2003-01-11 DE DE2003100774 patent/DE10300774A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT310510B (en) * | 1971-02-11 | 1973-10-10 | Pitner Alfred | Combined radial-axial bearing |
DE4303885A1 (en) * | 1993-02-10 | 1994-08-11 | Schaeffler Waelzlager Kg | Axial bearing |
DE19711557A1 (en) * | 1997-03-20 | 1998-09-24 | Schaeffler Waelzlager Ohg | Radial piston pump |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006015897A1 (en) * | 2005-12-10 | 2007-06-14 | Continental Teves Ag & Co. Ohg | Electric motor pump unit, has channels provided for transporting leakage fluid from crank case into spatial environment, and needle bush with ring shaped sealing unit, which closes gap within shaft passage |
DE102007015687A1 (en) * | 2007-03-31 | 2008-10-02 | Schaeffler Kg | Radial rolling bearing for an eccentric drive, eccentric drive for a radial piston pump and anti-lock braking system with the eccentric drive |
DE102007015687B4 (en) * | 2007-03-31 | 2020-02-20 | Schaeffler Technologies AG & Co. KG | Anti-lock braking system with a radial piston pump with an eccentric drive with a radial roller bearing |
DE102016202276B3 (en) * | 2016-02-15 | 2017-04-06 | Schaeffler Technologies AG & Co. KG | Eccentric arrangement in particular for a pump of an ABS system and pump for the ABS system |
US20190234454A1 (en) * | 2016-10-12 | 2019-08-01 | Hitachi Automotive Systems, Ltd. | Pump Apparatus and Brake Apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER KG, 91074 HERZOGENAURACH, DE |
|
8110 | Request for examination paragraph 44 | ||
8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 H, DE |
|
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |
Effective date: 20120621 |