EP1581744A1 - Pompe a pistons radiaux - Google Patents

Pompe a pistons radiaux

Info

Publication number
EP1581744A1
EP1581744A1 EP03785522A EP03785522A EP1581744A1 EP 1581744 A1 EP1581744 A1 EP 1581744A1 EP 03785522 A EP03785522 A EP 03785522A EP 03785522 A EP03785522 A EP 03785522A EP 1581744 A1 EP1581744 A1 EP 1581744A1
Authority
EP
European Patent Office
Prior art keywords
piston
sliding block
pump
support
slide shoe
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.)
Granted
Application number
EP03785522A
Other languages
German (de)
English (en)
Other versions
EP1581744B8 (fr
EP1581744B1 (fr
Inventor
Uwe Nigrin
Hanz-Joachim Salzinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1581744A1 publication Critical patent/EP1581744A1/fr
Application granted granted Critical
Publication of EP1581744B1 publication Critical patent/EP1581744B1/fr
Publication of EP1581744B8 publication Critical patent/EP1581744B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam

Definitions

  • the present invention relates to a radial piston pump with a plurality of pump units, according to the preamble of patent claim 1.
  • Such a radial piston pump is already known from DE 100 39 210 AI.
  • the radial piston pump has one
  • each pump unit has a pump piston which is guided radially longitudinally in the pump housing.
  • the pump piston rests on a sliding block that is supported on the cam ring.
  • the cam ring has a number of flats corresponding to the number of pump pistons.
  • each pump unit has a slide shoe arrangement with a return spring and a support piston. The return spring is supported with one end on the pump cylinder and the other end on the support piston. Preloading the support spring ensures that the slide shoe remains in constant contact with the cam ring.
  • FIG. 6 A sliding shoe arrangement known from DE 100 39 210 AI is shown in FIG. 6.
  • the support piston is designed as a stepped sleeve 6.
  • the sleeve 6 lies against the cylinder 4 and is thus guided during the up and down movement of the cylinder.
  • the widening of the diameter of the sleeve in the lower area serves to receive the slide shoe 8.
  • the slide shoe 8 is essentially cylindrical, with a narrow collar 17 on its side upper end. The diameter of the collar 17 corresponds approximately to the inner diameter of the sleeve in the area of the slide shoe holder.
  • the sliding shoe is pushed into the receptacle of the sleeve and then secured with the snap ring 12, so that both components are firmly connected to one another.
  • the diameter of the slide shoe is always smaller than the snap ring or the inner diameter of the sleeve 6 in the area of the slide shoe receptacle. This limits the contact area of the slide shoe on the lifting ring. Due to the ever increasing requirements regarding maximum pressure generation, the surface pressure between the slide shoe and the cam ring continues to increase, which leads to increased wear of the two components. In addition, when fastening with a snap ring, an additional check must always be carried out to ensure that the snap ring is correctly installed.
  • the object of the invention is therefore to enable safe and simple assembly of the slide shoe arrangement and to reduce the surface pressure on the contact area between the slide shoe and the cam ring.
  • the invention is characterized in that the connection between the sliding shoe and the support piston is directly positive, the positive connection being effected by a snap-in connection.
  • the form-fit by means of a snap-in connection ensures particularly easy installation. An additional securing with a snap ring is not necessary. By eliminating an additional component, the material costs are also reduced. After they have snapped into place, the two components have a play to one another, as a result of which an axial offset between the sliding shoe and the support piston is compensated for can and a full-surface contact between the shoe and the cam ring is guaranteed.
  • a particularly advantageous embodiment of the invention provides for the slide shoe to be in the form of a stamp, the end face with the larger cross-sectional area resting on the cam ring. In this way, a particularly large contact surface on the cam ring can be achieved, whereby the surface pressure can be significantly reduced compared to the prior art.
  • FIG. 1 shows a longitudinal section through the radial piston pump
  • Figure 2 shows a simplified cross section through the, in Figure
  • Figure 3 is a detailed view of a pump unit of the figure
  • Figure 4a is a detailed view of the support piston with mounted slide shoe
  • Figure 4b shows a detail section of the locking connection between
  • Support piston and slide shoe and Figure 5 shows another embodiment of a slide shoe.
  • FIG. 1 shows a longitudinal section through the radial piston pump 1.
  • the radial piston pump 1 has a pump housing in which an eccentric shaft 2 is mounted.
  • a movable cam ring 9 is arranged, in which a slide ring 10 is secured against rotation.
  • the lifting ring 9 has, as can be seen in particular in FIG. 2, three flattenings, on each of which a sliding block 8 of an associated pump unit 13 is supported.
  • the sliding block 8 is pressed against the lifting ring 9 by a support piston 6, so that the lifting ring 9 is fixed in such a way that it cannot freely follow the rotational movement of the eccentric shaft 2, but merely performs a wobble movement.
  • the individual pistons of the radial piston pump are loaded by this wobble movement. moved.
  • the slide shoe 8 is connected to the support piston 6 by a snap connection.
  • the snap-in connection forms a positive connection between the two components and, on the other hand, it ensures a certain amount of play between the support piston 6 and the slide shoe 8. Through the play, it is possible to compensate for a possible axial misalignment between the support piston 6 and the slide shoe 8 and thus to Ensure that the sliding block 8 is always in full contact with the cam ring 9.
  • FIG. 3 shows a detailed view of a pump unit as used in the radial piston pump 1 according to FIGS. 1 and 2.
  • the pump unit 13 consists of a piston 3, a cylinder 4, a return spring 5, a support piston 6, a return element 7 and a sliding block 8.
  • the piston 3 is guided in the cylinder 4 in an axially freely movable manner.
  • the sliding block 8 in turn is supported on the cam ring 9.
  • the pump unit 13 has a support piston 6, a return element 7 and a return spring 5.
  • the support piston 6 is guided in the area of the outer circumference of the cylinder 4.
  • the return spring 5 is supported with one end on the cylinder 4 and on the other end on the support piston 6.
  • the sliding block 8 and the support piston 6 are designed in such a way that an outer circumferential region of the sliding block 8 is engaged in the assembled state in the inner circumferential region of the support piston 6 and thus produces a positive connection between the two components.
  • a reset element 7 is additionally fastened to the piston 3, which is supported on a shoulder region of the support piston 6 and ensures that the piston 3 is returned from its upper end point position to its lower end point position and is constantly in contact with the sliding block 8.
  • FIGS. 4a and 4b show a detailed view of the slide shoe arrangement.
  • the slide shoe 8 and the support piston ⁇ are positively connected to one another by a snap connection.
  • An outer area of the sliding block 8 snaps into an inner area of the support piston 6.
  • the support piston 6 is essentially designed as a step-shaped, cylindrical sleeve.
  • the sliding block 8 is pushed into the widened end of the support piston 6 and lies against a first collar 15, which forms the transition from the larger to the smaller inside diameter of the support piston 6.
  • the snap-in connection is made by a narrow second collar 14 in the edge region of the widened end of the support piston 6.
  • the support piston 6 has an inner diameter D1 which is slightly smaller than the outer region of the sliding block 8 provided for positive locking. which has the diameter D3.
  • the widened end of the support piston 6 has an inner diameter D2 which is somewhat larger than the diameter D3 of the sliding block 8.
  • the sliding block 8 must first be through the second collar 14 overcome the narrowed area of the support piston 6.
  • the sliding block 8 must be pressed into the supporting piston 6 with a corresponding force. Pressing can be done with a hammer or a small press, for example. Once the sliding block 8 has overcome the second collar 14, it snaps into the supporting piston 6 and thereby forms a positive connection with the supporting piston 6.
  • FIG. 5 shows a further, particularly advantageous, exemplary embodiment of the sliding shoe connection.
  • the latching connection is identical to that shown in Figure 4.
  • the slide shoe 8 is designed in the shape of a stem, the end face with the larger cross-sectional area abutting the cam ring 9. Due to the latching connection, by means of which the securing by means of a snap ring is omitted, it is possible to design the sliding block 8 in such a way that the end face of the sliding block 8, which rests on the lifting ring 9, has a larger circumference than the maximum circumference of the support piston 6. This reduces the same load on the piston, the surface pressure between the sliding block 8 and the cam ring 9, which leads to an increased service life of the components.
  • the invention is not limited to the snap-in connection shown in the exemplary embodiments, but includes all snap-in connections known to the person skilled in the art.
  • locking connections are also included in which the support piston is enclosed by the sliding shoe and engages in it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe à pistons radiaux (1) comportant un arbre d'excentrique (2) pour entraîner plusieurs unités de pompe logées dans un carter de pompe. Lesdites unités de pompe présentent dans chaque cas un piston (3), un cylindre (4), un ressort de rappel (5), un piston d'appui (6), un élément de rappel (7) et un patin de guidage (8). Le piston (3) s'appuie sur le patin de guidage (8), qui s'appuie, quant à lui sur l'arbre d'excentrique (2), par l'intermédiaire d'une bague de levage (9) et d'une bague de glissement (10). Le patin de guidage (8) est solidarisé directement par liaison de forme avec le piston d'appui (6), l'assemblage par liaison de forme s'effectuant par encliquetage.
EP03785522A 2003-01-07 2003-11-17 Pompe a pistons radiaux Expired - Lifetime EP1581744B8 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2003100144 DE10300144B3 (de) 2003-01-07 2003-01-07 Radialkolbenpumpe
DE10300144 2003-01-07
PCT/DE2003/003795 WO2004061303A1 (fr) 2003-01-07 2003-11-17 Pompe a pistons radiaux

Publications (3)

Publication Number Publication Date
EP1581744A1 true EP1581744A1 (fr) 2005-10-05
EP1581744B1 EP1581744B1 (fr) 2007-09-05
EP1581744B8 EP1581744B8 (fr) 2008-01-02

Family

ID=32115599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03785522A Expired - Lifetime EP1581744B8 (fr) 2003-01-07 2003-11-17 Pompe a pistons radiaux

Country Status (3)

Country Link
EP (1) EP1581744B8 (fr)
DE (2) DE10300144B3 (fr)
WO (1) WO2004061303A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004035251B4 (de) * 2004-07-21 2006-06-14 Siemens Ag Radikalkolbenpumpe
DE102004050886A1 (de) * 2004-10-19 2006-04-20 Siemens Ag Radialkolbenpumpe mit Wellenabdichtung
DE102005007839B3 (de) * 2005-02-21 2006-05-18 Siemens Ag Radialkolbenpumpe mit Spülleitung
DE102011087501A1 (de) * 2010-12-23 2012-06-28 Schaeffler Technologies Gmbh & Co. Kg Radialkolbenpumpe
CN103758721B (zh) * 2013-10-18 2016-02-24 西安交通大学 一种轴配流式双列径向柱塞液压泵

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4216877C2 (de) * 1991-08-12 1996-08-29 Elasis Sistema Ricerca Fiat Radialkolbenpumpe
EP0816675B1 (fr) * 1996-07-01 2002-04-10 Mannesmann Rexroth AG Dispositif pour la stabilisation de l'anneau excentrique d'une pompe à pistons radiaux
DE19943160A1 (de) * 1998-09-10 2000-03-16 Denso Corp Kraftstoffeinspritzpumpe
DE19902324A1 (de) * 1999-01-21 2000-07-27 Mannesmann Rexroth Ag Hochdruckpumpe
DE10039210A1 (de) * 2000-08-10 2002-02-28 Siemens Ag Radialkolbenpumpe mit zweiteiligem Federträger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004061303A1 *

Also Published As

Publication number Publication date
EP1581744B8 (fr) 2008-01-02
EP1581744B1 (fr) 2007-09-05
WO2004061303A1 (fr) 2004-07-22
DE10300144B3 (de) 2004-05-19
DE50308141D1 (de) 2007-10-18

Similar Documents

Publication Publication Date Title
EP1797320B1 (fr) Pompe a pistons radiaux comprenant un poussoir a galet
WO2003058064A1 (fr) Pompe a carburant destinee a un moteur a combustion interne
DE10212492B4 (de) Kolbenpumpe
EP1769176B1 (fr) Ensemble d'etancheite
DE102006042677A1 (de) Axialkolbenmaschine mit einer Ansatzscheibe an einer Rückhaltescheibe, entsprechende Rückhaltescheibe und entsprechende Ansatzscheibe
AT519652B1 (de) Dichtungsvorrichtung und Hydraulikkolben mit Dichtungsvorrichtung
WO2010086134A1 (fr) Dispositif de réglage d'une machine hydrostatique
EP1581744B1 (fr) Pompe a pistons radiaux
EP1430224B1 (fr) Element d'assemblage pour assembler un piston et un element de rappel
EP2761178A1 (fr) Ensemble poussoir pour une pompe à haute pression de carburant ainsi que pompe à haute pression de carburant
WO2006037676A1 (fr) Pompe a piston radial et poussoir a galet
DE102004013662B4 (de) Hauptbremszylinder mit integrierter Transportsicherung
DE202012012656U1 (de) Pumpeneinheit mit rollendem Abgriff
EP2567114A1 (fr) Palier excentrique
DE202018102291U1 (de) Dichtungseinheit
EP3324064A1 (fr) Servocommande pour un embrayage à friction
EP3211203A1 (fr) Piston pour un moteur à combustion interne
WO1999035397A1 (fr) Appareil de nettoyage haute pression
DE102009008814B3 (de) Trennboden zur gas- oder flüssigkeitsdichten Trennung von Zylinderräumen
WO2008128866A1 (fr) Agencement d'une rondelle belleville dans un piston d'un élément de commutation
DE102012013122A1 (de) Hydrostatische Axialkolbenmaschine
DE102018203417A1 (de) Kolbenanordnung einer Brennkraftmaschine
DE102004026584A1 (de) Kolbenpumpe mit verringertem Verschleiß
DE102006043187B3 (de) Fluidpumpe, insbesondere Hochdruck-Kraftstoffpumpe für Einspritzsysteme von Brennkraftmaschinen
DE19509651C2 (de) Zylinder-Kolben-Anordnung für Hubkolbenmaschinen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050519

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20060629

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50308141

Country of ref document: DE

Date of ref document: 20071018

Kind code of ref document: P

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: SIEMENS VDO AUTOMOTIVE AG

ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: VDO AUTOMOTIVE AG

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070905

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: CONTINENTAL AUTOMOTIVE GMBH

26N No opposition filed

Effective date: 20080606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071130

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 50308141

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50308141

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20201130

Year of fee payment: 18

Ref country code: FR

Payment date: 20201120

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50308141

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: VITESCO TECHNOLOGIES GMBH, 30165 HANNOVER, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50308141

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211130