EP1150014A2 - Internal gear oil pump - Google Patents

Internal gear oil pump Download PDF

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Publication number
EP1150014A2
EP1150014A2 EP01102016A EP01102016A EP1150014A2 EP 1150014 A2 EP1150014 A2 EP 1150014A2 EP 01102016 A EP01102016 A EP 01102016A EP 01102016 A EP01102016 A EP 01102016A EP 1150014 A2 EP1150014 A2 EP 1150014A2
Authority
EP
European Patent Office
Prior art keywords
rotor
outer rotor
oil pump
internal
toothing
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.)
Withdrawn
Application number
EP01102016A
Other languages
German (de)
French (fr)
Other versions
EP1150014A3 (en
Inventor
Heribert Dipl.-Ing. Möller
Norbert Schatz
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge 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 MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP1150014A2 publication Critical patent/EP1150014A2/en
Publication of EP1150014A3 publication Critical patent/EP1150014A3/en
Withdrawn legal-status Critical Current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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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 an oil pump according to the preamble of the claim 1.
  • positive displacement pumps which essentially consist of an inner rotor with external teeth and an external rotor, the internal teeth meshes with the external toothing of the internal rotor.
  • the center of the inner rotor is toothed by a certain eccentricity with respect to the center of the outer rotor.
  • the two rotors are sealed on the front sides by a housing.
  • the inner rotor is rotatably mounted in the housing by means of a shaft and is supported by a Gear rotatably connected to the shaft.
  • the storage of the outer rotor takes place directly over its outer peripheral surface in the housing.
  • the invention has for its object to shorten the length of the pump and make it easier to assemble.
  • the gear wheel for driving the inner rotor saved.
  • the inner rotor is freely rotatable in the housing by means of a shaft.
  • Figure 1 shows the front view of the inner rotor 1 and outer rotor 2.
  • the inner rotor 1 is with a wave-shaped external toothing 3 and the outer rotor 2 with a also wave-shaped internal toothing 4 which mesh with each other.
  • the center points of the outer rotor 2 and inner rotor 1 are offset by the eccentricity e.
  • the pump is driven directly via the outer rotor 2.
  • the inner rotor 1 is freely rotatably mounted in the housing 6 by means of a shaft 5 (Fig. 2).
  • the entrainment of the inner rotor 1 takes place via its external toothing 3 and the internal toothing 4 of the outer rotor 2.
  • the outer rotor 2 can be driven by a ring gear 7 on the outer circumference of the outer rotor 2 is arranged.
  • the ring gear 7 is in engagement with a pinion 7a, which is mounted in the housing 6 and which is from the internal combustion engine is driven.
  • a pinion 7a which is mounted in the housing 6 and which is from the internal combustion engine is driven.
  • the ring gear 7 is arranged on one side.
  • the storage of the outer rotor 2 takes place on the remaining width, which is designed as a bearing surface 8.
  • the inner rotor 1 is mounted by means of the shaft 5 in the housing 6, which seals the rotors 1, 2 surrounds.
  • FIG. 3 shows another drive option.
  • the ring gear 7 is arranged in the center.
  • the remaining width of the outer rotor 2 is designed as a bearing surface 8a, 8b.
  • FIG. 4 Another efficient drive and storage option is shown in FIG. 4.
  • the Surfaces 9, which form the tip circle of the ring gear 7, serve directly the Storage in the surrounding housing 6. Special storage areas can be omitted because the entire width of the outer rotor 2 is used.

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

Abstract

A compact oil pump for an IC engine has the ring gear (2) with inner gear teeth which mesh with a freely running inner gear wheel (1) and outer gear teeth (7) which are driven by a pinion driven by the engine. The two gears have axes eccentrically offset. The end faces of the pump are closed and fitted with oil ducts. The outer drive gear extends for part of the thickness of the ring gear and does not increase the axial size of the pump.

Description

Die Erfindung bezieht sich auf eine Ölpumpe gemäß dem Gattungsbegriff des Patentanspruches 1.The invention relates to an oil pump according to the preamble of the claim 1.

Für die Umwälzung des Öls bei der Umlaufschmierung von Brennkraftmaschinen ist es bekannt Verdrängerpumpen anzuwenden, welche im wesentlichen aus einem Innenrotor mit Außenverzahnung und einem Außenrotor bestehen, dessen Innenverzahnung mit der Außenverzahnung des Innenrotors kämmt. Der Mittelpunkt des Innenrotors ist um eine gewisse Exzentrizität gegenüber dem Mittelpunkt des Außenrotors verzahnt.For the circulation of the oil in the circulation lubrication of internal combustion engines it is known to use positive displacement pumps, which essentially consist of an inner rotor with external teeth and an external rotor, the internal teeth meshes with the external toothing of the internal rotor. The center of the inner rotor is toothed by a certain eccentricity with respect to the center of the outer rotor.

Die beiden Rotoren werden an den Stirnseiten dichtend von einem Gehäuse umgeben. Der Innenrotor ist mittels einer Welle im Gehäuse drehbar gelagert und wird durch ein drehfest mit der Welle verbundenen Zahnrad angetrieben. Die Lagerung des Außenrotors erfolgt direkt über seine äußere Umfangsfläche im Gehäuse. Ein Nachteil dieser Anordnung ist darin zu sehen, daß die Pumpe durch das Zahnrad länger baut und daß das Zahnrad ein zusätzliches Bauteil darstellt, welches in Fertigung und Montage zusätzliche Kosten verursacht.The two rotors are sealed on the front sides by a housing. The inner rotor is rotatably mounted in the housing by means of a shaft and is supported by a Gear rotatably connected to the shaft. The storage of the outer rotor takes place directly over its outer peripheral surface in the housing. One disadvantage of this Arrangement can be seen in the fact that the pump builds longer through the gear and that the gear represents an additional component, which in manufacturing and assembly additional Costs.

Der Erfindung liegt die Aufgabe zugrunde, die Pumpe in der Länge gesehen zu verkürzen und montagefreundlicher zu gestalten. The invention has for its object to shorten the length of the pump and make it easier to assemble.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruches 1.This object is achieved by the characterizing features of the claim 1.

Durch den Antrieb des Außenrotors wird das Zahnrad für den Antrieb des Innenrotors eingespart. Der Innenrotor ist mittels Welle frei drehbar im Gehäuse gelagert. Durch den Wegfall des Zahnrades für den Antrieb des Innenrotors wird die Baulänge der Pumpe um die Breite des Zahnrades verkürzt und die Montage wesentlich freundlicher gestaltet.By driving the outer rotor, the gear wheel for driving the inner rotor saved. The inner rotor is freely rotatable in the housing by means of a shaft. By the elimination of the gear wheel for driving the inner rotor becomes the overall length of the Pump shortened by the width of the gear wheel and assembly much friendlier designed.

Vorteilhafte Ausbildungen des Antriebs und der Lagerung des Außenrotors sind den Ansprüchen 2 bis 5 zu entnehmen.Advantageous designs of the drive and the bearing of the outer rotor are the Claims 2 to 5.

Ausführungsbeispiele des Antriebes der Ölpumpe sind in Zeichnungen dargestellt. Es zeigt:

Fig. 1
eine stirnseitige Ansicht von Innen- und Außenrotor mit Ver- zahnung zum Antrieb des Außenrotors
Fig. 2
einen Halbschnitt II-II mit einseitigem Zahnkranz
Fig. 3
einen Halbschnitt II-II mit mittigem Zahnkranz
Fig. 4
einen Ausschnitt des Zahnkranzes bei dem die Flächen am Kopfkreis die Lagerflächen bilden
Embodiments of the drive of the oil pump are shown in drawings. It shows:
Fig. 1
an end view of the inner and outer rotor with teeth for driving the outer rotor
Fig. 2
a half-cut II-II with one-sided ring gear
Fig. 3
a half-cut II-II with a central ring gear
Fig. 4
a section of the ring gear in which the surfaces at the tip circle form the bearing surfaces

Figur 1 zeigt die stirnseitige Ansicht von Innenrotor 1 und Außenrotor 2. Der Innenrotor 1 ist mit einer wellenförmigen Außenverzahnung 3 und der Außenrotor 2 mit einer ebenfalls wellenförmigen Innenverzahnung 4 versehen, welche miteinander kämmen.Figure 1 shows the front view of the inner rotor 1 and outer rotor 2. The inner rotor 1 is with a wave-shaped external toothing 3 and the outer rotor 2 with a also wave-shaped internal toothing 4 which mesh with each other.

Die Mittelpunkte von Außenrotor 2 und Innenrotor 1 sind um die Exzentrizität e versetzt.The center points of the outer rotor 2 and inner rotor 1 are offset by the eccentricity e.

Der Antrieb der Pumpe erfolgt erfindungsgemäß unmittelbarüber den Außenrotor 2. Der Innenrotor 1 ist dabei mittels einer Welle 5 frei drehbar im Gehäuse 6 gelagert ( Fig. 2 ). Die Mitnahme des Innenrotors 1 erfolgt über dessen Außenverzahnung 3 und die Innenverzahnung 4 des Außenrotors 2.According to the invention, the pump is driven directly via the outer rotor 2. The inner rotor 1 is freely rotatably mounted in the housing 6 by means of a shaft 5 (Fig. 2). The entrainment of the inner rotor 1 takes place via its external toothing 3 and the internal toothing 4 of the outer rotor 2.

Der Antrieb des Außenrotors 2 kann durch einen Zahnkranz 7 erfolgen der auf dem äußeren Umfang des Außenrotors 2 angeordnet ist. Der Zahnkranz 7 steht im Eingriff mit einem Ritzel 7a, welches im Gehäuse 6 gelagert ist und welches von der Brennkraftmaschine angetrieben wird. Beim Antrieb des Zahnkranzes 7 wird der Innenrotor über die Innen- und Außenverzahnung 4, 3 mitgenommen. Durch die Vergrößerung und Verkleinerung der Zahnlücken wird die erwünschte Saug- bzw. Pumpwirkung hervorgerufen.The outer rotor 2 can be driven by a ring gear 7 on the outer circumference of the outer rotor 2 is arranged. The ring gear 7 is in engagement with a pinion 7a, which is mounted in the housing 6 and which is from the internal combustion engine is driven. When driving the ring gear 7, the inner rotor taken along the internal and external teeth 4, 3. By enlarging and reduction of the tooth gaps the desired suction or pumping action is brought about.

Nach Figur 2 ist der Zahnkranz 7 einseitig angeordnet. Die Lagerung des Außenrotors 2 erfolgt auf der Restbreite, welche als Lagerfläche 8 ausgebildet ist. Der Innenrotor 1 wird mittels der Welle 5 im Gehäuse 6 gelagert, welches die Rotoren 1, 2 dichtend umgibt.According to Figure 2, the ring gear 7 is arranged on one side. The storage of the outer rotor 2 takes place on the remaining width, which is designed as a bearing surface 8. The inner rotor 1 is mounted by means of the shaft 5 in the housing 6, which seals the rotors 1, 2 surrounds.

Eine weitere Antriebsmöglichkeit zeigt Fig. 3. Der Zahnkranz 7 ist mittig angeordnet. Die restliche Breite des Außenrotors 2 ist als Lagerfläche 8a, 8b ausgebildet.FIG. 3 shows another drive option. The ring gear 7 is arranged in the center. The remaining width of the outer rotor 2 is designed as a bearing surface 8a, 8b.

Eine weitere rationelle Antriebs- und Lagermöglichkeit ist in Figur 4 dargestellt. Die Flächen 9, welche den Kopfkreis des Zahnkranzes 7 bilden, dienen unmittelbar der Lagerung im umgebenden Gehäuse 6. Besondere Lagerflächen können entfallen, da die gesamte Breite des Außenrotors 2 genützt wird.Another efficient drive and storage option is shown in FIG. 4. The Surfaces 9, which form the tip circle of the ring gear 7, serve directly the Storage in the surrounding housing 6. Special storage areas can be omitted because the entire width of the outer rotor 2 is used.

Durch den direkten Antrieb des Außenrotors 2 entfällt das Zahnrad für den Antrieb des Innenrotors 1 ersatzlos. Die gesamte Pumpe baut folglich um die erforderliche Breite dieses Zahnrades kürzer. Zudem entfällt die Befestigung dieses Zahnrades auf der Welle 5 des Innenrotors, wodurch die Montage rationalisiert wird.The direct drive of the outer rotor 2 eliminates the gearwheel for driving the Inner rotor 1 without replacement. The entire pump consequently builds the required width of this gear shorter. In addition, the attachment of this gear on the Inner rotor shaft 5, which rationalizes assembly.

Claims (5)

Ölpumpe für Umlaufschmierung von Brennkraftmaschinen, bestehend im wesentlichen aus einem Innenrotor mit wellenförmiger Außenverzahnung und einem Außenrotor, dessen wellenförmige Innenverzahnung mit der Außenverzahnung des Innenrotors kämmt, wobei die Mittelpunkte von Innen- und Außenrotor um eine gewisse Exzentrizität versetzt sind und bei dem Innen- und Außenrotor stirnseitig dichtend vom Gehäuse umgeben sind, sowie die Lagerung des Außenrotors über seine Umfangsfläche unmittelbar im Gehäuse erfolgt, dadurch gekennzeichnet, daß der Antrieb über den Außenrotor (23) erfolgt und daß der Innenrotor (1) mittels einer Welle (5) frei drehbar im Gehäuse (6) gelagert ist.Oil pump for circulating lubrication of internal combustion engines, consisting essentially of an inner rotor with wave-shaped external toothing and an outer rotor, the wave-shaped internal toothing of which meshes with the external toothing of the internal rotor, the centers of the internal and external rotor being offset by a certain amount of eccentricity and for the internal and external rotor are sealingly surrounded on the end face by the housing, and the outer rotor is mounted directly in the housing via its peripheral surface, characterized in that the drive is effected via the outer rotor (23) and that the inner rotor (1) is freely rotatable in the housing by means of a shaft (5) (6) is stored. Ölpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Außenrotor (2) auf einem Teil seines äußeren Umfangs eine Verzahnung (7) aufweist und der restliche Teil der Umfangsfläche als Lagerfläche (8) ausgebildet ist.Oil pump according to claim 1, characterized in that the outer rotor (2) has a toothing (7) on part of its outer circumference and the remaining part of the circumferential surface is designed as a bearing surface (8). Ölpumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Verzahnung (7) auf dem Umfang des Außenrotors (2) mittig angeordnet ist und die Lagerflächen (8a, 8b) zu beiden Seiten des Zahnkranzes (7) vorgesehen sind.Oil pump according to claim 2, characterized in that the toothing (7) is arranged centrally on the circumference of the outer rotor (2) and the bearing surfaces (8a, 8b) are provided on both sides of the ring gear (7). Ölpumpe nach Anspruch 2, dadurch gekennzeichnet, daß der Zahnkranz (7) auf dem Umfang des Außenrotors (2) einseitig angeordnet ist und die Lagerfläche (8) die restliche Breite des Außenrotors (2) umfaßt. Oil pump according to Claim 2, characterized in that the toothed ring (7) is arranged on one side on the circumference of the outer rotor (2) and the bearing surface (8) comprises the remaining width of the outer rotor (2). Ölpumpe nach Anspruch 2, dadurch gekennzeichnet, daß der Zahnkranz (7) die gesamte Breite des Außenrotors (2) umfaßt und daß dabei die Flächen (9), welche die Zähne am Kopfkreis des Zahnkranzes (7) bilden als Lagerfläche dient.Oil pump according to claim 2, characterized in that the ring gear (7) covers the entire width of the outer rotor (2) and that the surfaces (9) which form the teeth on the tip circle of the ring gear (7) serve as a bearing surface.
EP01102016A 2000-04-27 2001-01-30 Internal gear oil pump Withdrawn EP1150014A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10020568 2000-04-27
DE2000120568 DE10020568A1 (en) 2000-04-27 2000-04-27 Oil pump for circulation lubrication of internal combustion engines

Publications (2)

Publication Number Publication Date
EP1150014A2 true EP1150014A2 (en) 2001-10-31
EP1150014A3 EP1150014A3 (en) 2002-09-25

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ID=7640064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01102016A Withdrawn EP1150014A3 (en) 2000-04-27 2001-01-30 Internal gear oil pump

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EP (1) EP1150014A3 (en)
DE (1) DE10020568A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006134337A1 (en) * 2005-06-11 2006-12-21 Concentric Vfp Ltd A variable output pump
WO2007128257A1 (en) * 2006-05-06 2007-11-15 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Delivery device for a fluid

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE669696C (en) * 1939-01-02 Ludwig Geb Gear pump with internal meshing of the teeth
US3407741A (en) * 1966-09-15 1968-10-29 Caterpillar Tractor Co Compact oil pump for internal combustion engines
DE2547994A1 (en) * 1975-10-27 1977-05-05 Sperry Rand Corp GEAR PUMP OR MOTOR
JPS57183583A (en) * 1981-05-08 1982-11-11 Suzuki Motor Co Ltd Trochoid pump
EP0457490A1 (en) * 1990-05-12 1991-11-21 Concentric Pumps Limited Gerotor pumps
DE29710407U1 (en) * 1996-11-12 1997-07-31 Voith Turbo GmbH & Co. KG, 89522 Heidenheim Internal gear pump with drive via the ring gear

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE669696C (en) * 1939-01-02 Ludwig Geb Gear pump with internal meshing of the teeth
US3407741A (en) * 1966-09-15 1968-10-29 Caterpillar Tractor Co Compact oil pump for internal combustion engines
DE2547994A1 (en) * 1975-10-27 1977-05-05 Sperry Rand Corp GEAR PUMP OR MOTOR
JPS57183583A (en) * 1981-05-08 1982-11-11 Suzuki Motor Co Ltd Trochoid pump
EP0457490A1 (en) * 1990-05-12 1991-11-21 Concentric Pumps Limited Gerotor pumps
DE29710407U1 (en) * 1996-11-12 1997-07-31 Voith Turbo GmbH & Co. KG, 89522 Heidenheim Internal gear pump with drive via the ring gear

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 029 (M-191), 5. Februar 1983 (1983-02-05) -& JP 57 183583 A (SUZUKI JIDOSHA KOGYO KK), 11. November 1982 (1982-11-11) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006134337A1 (en) * 2005-06-11 2006-12-21 Concentric Vfp Ltd A variable output pump
GB2430237A (en) * 2005-06-11 2007-03-21 Concentric Pumps Ltd Variable output internal gear pump
WO2007128257A1 (en) * 2006-05-06 2007-11-15 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Delivery device for a fluid

Also Published As

Publication number Publication date
DE10020568A1 (en) 2001-10-31
EP1150014A3 (en) 2002-09-25

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