EP0713973A1 - Pompe à huile - Google Patents

Pompe à huile Download PDF

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Publication number
EP0713973A1
EP0713973A1 EP95117994A EP95117994A EP0713973A1 EP 0713973 A1 EP0713973 A1 EP 0713973A1 EP 95117994 A EP95117994 A EP 95117994A EP 95117994 A EP95117994 A EP 95117994A EP 0713973 A1 EP0713973 A1 EP 0713973A1
Authority
EP
European Patent Office
Prior art keywords
lubricant
drive wheel
pump
outer rotor
rotor
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
EP95117994A
Other languages
German (de)
English (en)
Other versions
EP0713973B1 (fr
Inventor
Kurt Hoffmann
Franz Maucher
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.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
Schwaebische Huettenwerke Automotive GmbH
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 Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Publication of EP0713973A1 publication Critical patent/EP0713973A1/fr
Application granted granted Critical
Publication of EP0713973B1 publication Critical patent/EP0713973B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes

Definitions

  • the invention relates to a lubricant pump driven on the outer rotor of the type described in the preamble of claim 1.
  • Such lubricant pumps are known and generally contain a housing which, as a fixed component, has devices for supplying and removing lubricant and, together with a cover which is placed on the side of a drive wheel, closes off the pump on all sides to the outside.
  • a housing which, as a fixed component, has devices for supplying and removing lubricant and, together with a cover which is placed on the side of a drive wheel, closes off the pump on all sides to the outside.
  • Such pumps have a relatively high weight, which can hardly be reconciled with the lightweight construction for motor vehicles that is sought today.
  • Another disadvantage of generic pumps is the fact that it is often unavoidable that rotating components of the pump have to be stored in the housing, as a result of which friction and thus energy or fuel consumption increase.
  • An internal rotor gear oil pump for motor vehicle internal combustion engines is also known from German Offenlegungsschrift No. 32 43 067 A1, which has a heavy housing that completely encloses the two rotors.
  • German published patent application DE 41 23 190 A1 describes a pump driven on the outer rotor, which is arranged in a drive wheel or in a deflection roller of the internal combustion engine; the outer rotor is driven by the drive wheel or the deflection roller.
  • the disadvantage of the pump described here is that the outer rotor is completely surrounded by the drive wheel, wherein it is mounted on a fixed part by means of a rotating seal, a construction which in turn entails high weight and great friction losses.
  • the outer rotor forms the lubricant pump according to the invention together with the drive wheel the outer end of the pump-side part of the lubricant pump.
  • This construction makes the formation of a housing completely surrounding the pump or a cup-shaped drive wheel accommodating the outer rotor unnecessary, since the outer rotor, which is fixedly connected to the drive wheel, limits the pump itself to the outside and thus, in an essential property, the function of the housing itself takes over.
  • the drive wheel advantageously only has to be designed so large and complex that it forms a tight outer seal of the pump together with the outer rotor, which results in a noticeable weight saving for the pump.
  • the generic pump-closing housing can be reduced to a lubricant guide part that slidably seals with the outer rotor, which in turn saves weight.
  • the drive wheel and the outer rotor can be formed in one piece.
  • the drive wheel and the outer rotor can be mounted in a press fit with its outer surface in an inner shoulder of the drive wheel.
  • Welded connection as well as pin or bolt connections between the drive wheel and the outer rotor are conceivable.
  • connection of the outer rotor to the outer wall of the lubricant guide part can advantageously be realized in that the outer rotor, with its end face facing away from the drive wheel, rests against the end face facing the drive wheel on the outer wall of the lubricant guide part and thus slidably seals both the lubricant supply space and the lubricant discharge space to the outside .
  • the friction between the end faces can be kept low by suitable design of the surfaces, the tightness on these surfaces being sufficient for pumps which e.g. are arranged in an oil pan.
  • a pressure relief valve on the lubricant guiding part of the pump according to the invention can avoid operational disturbances due to excessive pressure.
  • the drive wheel can be centered by means of a fastening screw on the shaft supporting the drive wheel in the carrier section, which is an easily removable overall mounting of the pump if the shaft, as will preferably be the case, faces away from the drive wheel Side of the support part is supported on this.
  • the shaft which is preferably slidably mounted on two outer running surfaces in the carrier part, provides these offset plain bearings by means of the design and the axial dimensions the axial play of the pump part. Disks can also be used for fine adjustment or readjustment. There are also other possibilities known to the person skilled in the art for the rotationally fixed, frictional or form-fitting mounting and centering of the drive wheel on the shaft.
  • the lubricant pump according to the present invention can be constructed from a metallic material, in particular aluminum.
  • the extremely low friction occurring in a lubricant pump designed according to the invention preferably also allows the lubricant guide part to be constructed from a plastic, in particular a thermoplastic.
  • the pump part also consists of a plastic, in particular a thermoset.
  • the single figure shows an embodiment of a lubricant pump according to the invention arranged in an oil pan 40 with a lubricant guide part 10 and a pump part 20.
  • the pump pumps lubricant through an intake port 11 into a lubricant supply chamber 12 and by means of the rotor set 22, 23 into a lubricant discharge chamber 16 and from there an outlet port 14 to the place of use.
  • the stationary lubricant guide part 10 essentially has a support section 13 and an outer end forming outer wall 12.
  • a lubricant supply space 15 is formed between the outer wall 12 and the carrier section 13, into which the lubricant is sucked in via the intake port 11.
  • a lubricant discharge chamber 16, essentially radially opposite the lubricant supply chamber 15, is also delimited by the outer wall 12 and the carrier section 13. The lubricant under pressure will be pumped out of the lubricant discharge space 16 into the outlet connection 14.
  • the carrier section 13 has a central bore through which a shaft 30 (from the right in the drawing) can be inserted until an end shoulder 32 of the shaft 30 bears against the carrier section 13.
  • the shaft 30 has two stepped sliding seats with which it is centered in the central bore of the carrier section 13.
  • a drive wheel 21 provided with a central bore can be placed on the resulting seat of the shaft 30 after the inner rotor 23 has been loosely placed on a drive wheel-side collar of the carrier section 13, which forms its bearing point.
  • the outer rotor 22 is fastened to an inner shoulder of the drive wheel 21.
  • This attachment can, for example, as shown in the figure, take place by means of a press fit, but can also be realized by other frictional or positive connection methods.
  • the axial play of the rotor set 22, 23 can be adjusted in this construction by a suitable choice of the axial lengths of the shaft shoulders.
  • a circumferential seal 24 is inserted between the end faces of the outer rotor 22 and the outer wall 12 of the lubricant guide part 10, which serves on the supply side to prevent air from being sucked into the lubricant supply space 15 between the abutting end faces.
  • the circulation seal 24 prevents leakage of the lubricant under pressure on this side.
  • the inner rotor 23 has one tooth less on the outside than the inner toothing of the outer rotor 22, and when the drive wheel 21 rotates, a negative pressure is generated in the lubricant supply space 15 via the conventional gear pump technology, as a result of which lubricant is sucked into the suction nozzle 11 therein.
  • This lubricant is pumped under increasing pressure during the rolling process of the inner and outer rotors 23, 22 into the lubricant discharge space 16, from which it can be fed to its destination via the outlet connection 14.
  • a pressure relief valve 18 protects the pump against excessive internal pressures and can thus e.g. counteract destruction of the seal 24.
  • Metallic materials in particular aluminum, are suitable as preferred materials for the lubricant guide part 10 and the pump part 20.
  • a plastic in particular a thermoplastic such as PA 4.6, PPS or PA 6.6 GF 30.
  • the pump part 20 can also be made of a plastic, in particular a thermoset. Examples of preferred materials for this purpose are RX 655 from Vyncolit or Ridurit from Ringsdorf.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP95117994A 1994-11-22 1995-11-15 Pompe à huile Expired - Lifetime EP0713973B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4441522A DE4441522A1 (de) 1994-11-22 1994-11-22 Schmiermittelpumpe
DE4441522 1994-11-22

Publications (2)

Publication Number Publication Date
EP0713973A1 true EP0713973A1 (fr) 1996-05-29
EP0713973B1 EP0713973B1 (fr) 1998-05-27

Family

ID=6533848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117994A Expired - Lifetime EP0713973B1 (fr) 1994-11-22 1995-11-15 Pompe à huile

Country Status (4)

Country Link
US (1) US5823750A (fr)
EP (1) EP0713973B1 (fr)
JP (1) JP3643156B2 (fr)
DE (2) DE4441522A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7137789B2 (en) * 1997-07-18 2006-11-21 Rpm Industries, Inc. Vent for reducing seal pressure in pump assembly
US6461118B1 (en) * 1997-07-18 2002-10-08 Rpm Industries, Inc. Oil pump by-pass valve for an internal combustion engine
US7150286B2 (en) * 1997-10-30 2006-12-19 Rpm Industries, Inc. Methods and systems for performing, monitoring and analyzing multiple machine fluid processes
US9062575B2 (en) * 1997-10-30 2015-06-23 RPM Industries, LLC Methods and systems for performing, monitoring and analyzing multiple machine fluid processes
US6708710B1 (en) * 1997-10-30 2004-03-23 Rpm Industries, Inc. Vehicle fluid change apparatus and method
US6988506B1 (en) 1997-10-30 2006-01-24 Rpm Industries, Inc. Fluid transfer system
US6853954B2 (en) * 2002-09-24 2005-02-08 John K. Apostolides Methods and systems for collecting and processing data in association with machine operation and maintenance
DE102004048138A1 (de) * 2004-07-14 2006-02-02 Daimlerchrysler Ag Ölfördersystem für eine Brennkraftmaschine
DE102005030251B4 (de) * 2005-06-29 2017-03-23 Bayerische Motoren Werke Aktiengesellschaft Zahnradpumpe, insbesondere Zahnradölpumpe für Fahrzeuge
DE102006006555B4 (de) * 2006-02-13 2008-03-06 Siemens Ag Hochdruckpumpe
DE102006008757A1 (de) * 2006-02-24 2007-08-30 Daimlerchrysler Ag Förderpumpe in einem Kraftfahrzeug
US20160223068A1 (en) * 2015-02-02 2016-08-04 Caterpillar Inc. Modularized Idler Shaft
CN105387324A (zh) * 2015-12-14 2016-03-09 中国航空工业集团公司金城南京机电液压工程研究中心 一种供油装置
CN107339595A (zh) * 2017-07-25 2017-11-10 力帆实业(集团)股份有限公司 摩托车发动机机油泵总成
CN107725208B (zh) * 2017-09-22 2024-02-27 力帆实业(集团)股份有限公司 摩托车水冷发动机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243067A1 (de) 1982-11-22 1984-05-24 Schwäbische Hüttenwerke GmbH, 7080 Aalen Innenlaeuferzahnradoelpumpe fuer kraftfahrzeugverbrennungsmotoren
DE3603773A1 (de) 1986-01-03 1987-07-09 Schwaebische Huettenwerke Gmbh Zahnradmaschine
DE4123190A1 (de) 1991-06-07 1992-12-10 Schwaebische Huettenwerke Gmbh Zahnradpumpe fuer oel fuer einen verbrennungsmotor, insbesondere fuer kraftfahrzeuge

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792788A (en) * 1957-05-21 eames
US3407741A (en) * 1966-09-15 1968-10-29 Caterpillar Tractor Co Compact oil pump for internal combustion engines
US4185717A (en) * 1978-05-08 1980-01-29 General Motors Corporation Engine lubricating oil pump
DE3026222A1 (de) * 1980-07-10 1982-02-04 Siegfried Alexander Dipl.-Ing. 7960 Aulendorf Eisenmann Zahnringpumpe
JPS57183583A (en) * 1981-05-08 1982-11-11 Suzuki Motor Co Ltd Trochoid pump
GB8822696D0 (en) * 1988-09-28 1988-11-02 Concentric Pumps Ltd Improvements relating to gerotor pumps
ATE120257T1 (de) * 1990-05-12 1995-04-15 Concentric Pumps Ltd Gerotorpumpen.
DE4214752C2 (de) * 1992-05-04 1994-04-07 Alexander Maute Ölpumpe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243067A1 (de) 1982-11-22 1984-05-24 Schwäbische Hüttenwerke GmbH, 7080 Aalen Innenlaeuferzahnradoelpumpe fuer kraftfahrzeugverbrennungsmotoren
DE3603773A1 (de) 1986-01-03 1987-07-09 Schwaebische Huettenwerke Gmbh Zahnradmaschine
DE4123190A1 (de) 1991-06-07 1992-12-10 Schwaebische Huettenwerke Gmbh Zahnradpumpe fuer oel fuer einen verbrennungsmotor, insbesondere fuer kraftfahrzeuge

Also Published As

Publication number Publication date
US5823750A (en) 1998-10-20
JPH08240297A (ja) 1996-09-17
JP3643156B2 (ja) 2005-04-27
DE59502328D1 (de) 1998-07-02
EP0713973B1 (fr) 1998-05-27
DE4441522A1 (de) 1996-05-23

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