EP1193395B1 - Internal gear pump - Google Patents

Internal gear pump Download PDF

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Publication number
EP1193395B1
EP1193395B1 EP01120451A EP01120451A EP1193395B1 EP 1193395 B1 EP1193395 B1 EP 1193395B1 EP 01120451 A EP01120451 A EP 01120451A EP 01120451 A EP01120451 A EP 01120451A EP 1193395 B1 EP1193395 B1 EP 1193395B1
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EP
European Patent Office
Prior art keywords
housing
bearing ring
adjusting
internal
gear pump
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
Application number
EP01120451A
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German (de)
French (fr)
Other versions
EP1193395A3 (en
EP1193395A2 (en
Inventor
Matthias Schmidl
Bernhard Rettenbacher
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1193395A2 publication Critical patent/EP1193395A2/en
Publication of EP1193395A3 publication Critical patent/EP1193395A3/en
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Publication of EP1193395B1 publication Critical patent/EP1193395B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/102Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10Outer members for co-operation with rotary pistons; Casings
    • F01C21/102Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086Carter
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00Manufacture
    • F04C2230/60Assembly methods
    • F04C2230/602Gap; Clearance

Definitions

  • the invention is based on an internal gear pump according to the Genus of claim 1.
  • Such an internal gear pump is known from DE 38 27 573 known.
  • This internal gear pump has a housing, in to a toothed ring provided with an internal toothing a bearing ring is rotatably mounted about an axis. It is also provided with an external toothing, with the Toothed ring meshing pinion provided around an axis is rotatably mounted. The axis of rotation of the pinion is to Spindle of the toothed ring offset. The toothed ring or the Pinion is driven in rotation. Between the Pinion and the ring gear is in the radial direction with respect to the axes of rotation of the pinion and the toothed ring Consider a certain amount of play required to clamp to avoid.
  • the internal gear pump according to the invention with the features according to claim 1 has the advantage that by the Adjustment device a much finer radial play setting between the toothed ring and pinion is enabled. This allows the manufacture of the internal gear pump with larger tolerances and thus lower costs.
  • FIG. 1 shows an internal gear pump in one Cross-section along line I-I in Figure 2 and Figure 2 the Internal gear pump in a cross section along line II-II in FIG. 1
  • An illustrated in Figures 1 and 2 internal gear pump is preferably for conveying fuel from a Reservoir to a high-pressure fuel pump or a Fuel injection pump of a fuel injection system an internal combustion engine.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and the is funded by the internal gear pump fuel Diesel fuel.
  • the internal gear pump has a For example, two-piece housing with a housing part 10th and one connected thereto by means of screws 12 Cover part 14 on.
  • the housing part 10 and the cover part 14 For example, metal, such as steel or aluminum exist and be designed as a casting.
  • the housing part 10 has on its side facing the cover part 14 a side Recess 16, which in cross section at least approximately is circular.
  • the lid part 14 has at its the housing part 10 side facing also a Well 20, which at least approximately congruent arranged with the recess 16 of the housing part 10 and is trained. Through the housing part 10 and the cover part 14 is with their recesses 16 and 20 in the housing a Chamber limited.
  • the cover part 14 has a pin 18 of the housing part 10 coaxial opening 22. By the Opening 22 of the cover part 14 protrudes a drive shaft 24 of outside into the housing, with its end in a bore 26 is mounted in the pin 18.
  • a pinion 30th On the pin 18 of the housing part 10 is a pinion 30th about an axis 32 rotatably mounted, with a External teeth is provided.
  • the pinion 30 is over at least one coupling element 34 rotationally with the Drive shaft 24 connected.
  • the pinion 30 is surrounding a toothed ring 36 is arranged, which with an internal toothing is provided with the external teeth of the pinion 30th combs.
  • the external teeth of the pinion 30 has a Tooth less on than the internal toothing of the toothed ring 36th
  • the toothed ring 36 has on its outer periphery a circular cross section and is above this in one Bore 38 of the toothed ring 36 surrounding bearing ring 40 to an axle 42 rotatably mounted.
  • the axis of rotation 42 of Tooth ring 36 is parallel to the axis of rotation 32 of the Zahnritzels 30, but this is by a distance a added.
  • the bore 38 is eccentric in the bearing ring 40 to whose circular outer cross section is formed.
  • the Pinion 30 and the toothed ring 36 are in the recesses 16,20 between the housing part 10 and the cover part 14 in Direction of its axis of rotation 32 and 42 with little play arranged.
  • the pinion 30, the toothed ring 36 and the Bearing ring 40 are preferably made of steel, for example Sintered steel.
  • the bearing ring 40 faces the depressions 16 and 20 the housing part 10 and the cover part 14 a something smaller cross-section on.
  • the bearing ring 40 has in his Outer jacket two axially staggered annular grooves 44th on, in each of which an elastic ring 46 is inserted.
  • the bearing ring 40 rests on the rings 46, which over the Outer shell of the bearing ring 40 protrude to the Inner lateral surfaces of the recesses 16 and 20 from.
  • the Rings 46 are between the outer shell of the bearing ring 40 and the Inner edges of the recesses 16,20 clamped.
  • the Pinion 30 is about the drive shaft 24 about the axis 32nd driven in rotation.
  • the Suction side 48 is from the pressure side 49 through the on each other sliding teeth of the pinion 30 and of the toothed ring 36 separately. It is therefore necessary that between the teeth of the pinion 30 and the Tooth ring 36 the lowest possible radial clearance b is present and the axis of rotation 32 of the pinion 30 and the axis of rotation 42 of the toothed ring 36 in the radial direction the axes of rotation 32,42 are aligned exactly to each other.
  • the bearing ring 40 is a Adjusting device 50 assigned by means of the bearing ring 40 and thus the mounted in this toothed ring 36 in one radial direction with respect to the axes of rotation 32,42 to a Adjustment movable and in a set position is blockable.
  • the direction in which the bearing ring 40 is movable by means of the adjusting device is in Figure 2 illustrated by the double arrow 52.
  • the adjustment 52 is both to the axis of rotation 42 of the toothed ring 36 and the Rotary axis 32 of the pinion 30 radially.
  • the Adjustment device 50 is on the axis of rotation 42 of the Tooth ring 36 opposite side of the axis of rotation 32 of the Zahnritzels 30 arranged.
  • the adjusting device 50 has a with the bearing ring 40th firmly connected adjusting 54 on.
  • the adjusting element For example, with one of these protruding Bolt 56 in a bore 58 in the outer casing of the bearing ring 40 screwed between the two annular grooves 44 or pressed.
  • the adjusting element 54 has a with the Bolt 56 preferably integral slide-shaped Section 60 on.
  • In the housing part 10 and the cover part 14th is in each case a laxative of their depression 16 and 20 respectively Groove 62 formed, wherein the depth of the grooves 62 in the direction the axes of rotation 32,42 is less than the depth of Depressions 16,20.
  • the grooves 62 have starting from the Edge of the recesses 16,20 first a portion 62a with a small width and then with an area 62b larger width.
  • the slider portion 60 of the adjustment 54 is slidable between the grooves 62 in their areas 62b guided.
  • the width of the slider portion 60 is little smaller than the width of the portions 62b of the grooves 62, so that the slider portion 60 is guided with little play.
  • In the adjustment 52 is the length of the areas 62 b of Grooves 62 greater than the length of the slide portion 60, so that this in the adjustment direction 52 in the areas 62b can be moved.
  • the areas 62b of the grooves 62 and the slide portion 60 of the adjusting 54 can in Cross section as shown in Figure 2, for example, approximately be formed rectangular, the corners rounded are.
  • the bolt 56 of the adjusting element 54 passes through the Areas 62 a of the grooves 62 therethrough.
  • the adjusting element 54 has in its slide portion 60th a recess 64, for example in the form of an opening or a hole.
  • the recess 64 extends in Direction of the axes of rotation 32,42.
  • a fixing element 66 which may be used as an in a threaded bore 68 in the housing part 10 screwed Adjusting screw is formed.
  • the adjusting screw 66 protrudes on the outside of the housing part 10 and is there accessible, so that at this by means of a tool attacked and this can be twisted.
  • the Adjusting screw 66 may at her from the housing part 10th projecting end, for example, a cross or Phillips in which a corresponding blade of a Screwdrivers can be introduced.
  • the adjusting screw 66 due to Threaded connection with the housing part 10 in the direction of her Longitudinal axis 67 moves.
  • the adjusting screw 66 can self-locking thread to ensure that not inadvertently, for example as a result of occurring during operation of the internal gear pump Shaking, can twist what an adjustment of the radial play would result.
  • the Adjusting screw 66 also by means of a on the Housing part 10 projecting end portion screwed Locknut to be secured against rotation.
  • the recess 64 has a radial direction to the Rotary axes 32,42 side facing surface 70, at the the screw 66 with her in the recess 64th engaging end portion is applied.
  • the side surface 70 of Recess 64 is to the longitudinal axis 67 of the screw 66th arranged inclined so that the side surface 70 for Lid 14 towards the longitudinal axis 67 approaches.
  • the Recess 64 of the adjustment 54 for example as an at least approximately conical bore be formed, whereby the inclined arrangement of Side surface 70 is reached. It can also be provided that only the side surface 70 of the recess 64 through appropriate processing by means of a grinding or Milling tool is arranged inclined.
  • the side surface 70 the recess 64 may also be formed as an inclined plane be.
  • Adjusting screw 66 By rotation of the Adjusting screw 66 can thus from outside the housing and after complete assembly of internal gear pump the radial clearance between the toothed ring 36 and the pinion 30th be set to the required value.
  • a restoring force the bearing ring 40 is replaced by the elastically deformed rings 46 generated so that when unscrewing the screw 66, the side surface 70 of the recess 64 of the adjusting 54 remains in contact with the adjusting screw 66, since the Adjustment element 54 via the bearing ring 40 to the rotation axis 42nd of the toothed ring 36 is pressed.
  • unscrewing the adjusting screw 66 thus becomes the bearing ring 40 in FIG. 2 moves to the right and increases the radial clearance b.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Innenzahnradpumpe nach der Gattung des Anspruchs 1.The invention is based on an internal gear pump according to the Genus of claim 1.

Eine solche Innenzahnradpumpe ist durch die DE 38 27 573 bekannt. Diese Innenzahnradpumpe weist ein Gehäuse auf, in dem ein mit einer Innenverzahnung versehener Zahnring über einen Lagerring um eine Achse drehbar gelagert ist. Es ist außerdem ein mit einer Außenverzahnung versehenes, mit dem Zahnring kämmendes Zahnritzel vorgesehen, das um eine Achse drehbar gelagert ist. Die Drehachse des Zahnritzels ist zur Drehachse des Zahnrings versetzt. Der Zahnring oder das Zahnritzel wird rotierend angetrieben. Zwischen dem Zahnritzel und dem Zahnring ist in radialer Richtung bezüglich der Drehachsen des Zahnritzels und des Zahnrings betrachtet ein gewisses Spiel erforderlich, um ein Klemmen zu vermeiden. Andererseits sollte dieses radiale Spiel nicht zu groß sein, da dadurch zwischen dem Zahnritzel und dem Zahnring Spalte entstehen, durch die von der Innenzahnradpumpe zu förderndes Medium hindurchtritt, wodurch der Wirkungsgrad der Innenzahnradpumpe verschlechtert wird. Für die Herstellung der Innenzahnradpumpe sind daher enge Toleranzen der verschiedenen Bauteile vorgeschrieben, um das radiale Spiel in einem vorgegebenen Bereich zu halten, was zu einer aufwendigen und teuren Herstellung und Montage der Innenzahnradpumpe führt.Such an internal gear pump is known from DE 38 27 573 known. This internal gear pump has a housing, in to a toothed ring provided with an internal toothing a bearing ring is rotatably mounted about an axis. It is also provided with an external toothing, with the Toothed ring meshing pinion provided around an axis is rotatably mounted. The axis of rotation of the pinion is to Spindle of the toothed ring offset. The toothed ring or the Pinion is driven in rotation. Between the Pinion and the ring gear is in the radial direction with respect to the axes of rotation of the pinion and the toothed ring Consider a certain amount of play required to clamp to avoid. On the other hand, this radial play should not To be too large, since between the pinion and the Tooth ring column arise through the from the Internal gear pump to be conveyed medium passes, whereby the efficiency of the internal gear pump is worsened. For the production of Internal gear pump are therefore close tolerances of various components prescribed to the radial play to keep in a given area, resulting in one costly and expensive manufacture and assembly of Internal gear pump leads.

Die Druckschrift US 2 792 788 offenbart eine Innenzahnradpumpe, bei der das radiale Spiel zwischen Zahnring und Zahnritzel durch Drehung des Lagenrings stufenweise möglicht ist.The document US 2 792 788 discloses an internal gear pump in which the radial play between the toothed ring and the pinion By rotation of the layer ring is gradually possible.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Innenzahnradpumpe mit den Merkmalen ist gemäß Anspruch 1 hat demgegenüber den Vorteil, daß durch die Verstellvorrichtung eine viel feinere Einstellung des radialen Spiels zwischen Zahnring und Zahnritzel ermöglicht ist. Dies ermöglicht die Herstellung der Innenzahnradpumpe mit größeren Toleranzen und damit geringeren Kosten.The internal gear pump according to the invention with the features according to claim 1 has the advantage that by the Adjustment device a much finer radial play setting between the toothed ring and pinion is enabled. This allows the manufacture of the internal gear pump with larger tolerances and thus lower costs.

In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Innenzahnradpumpe angegeben. In den Ansprüchen 2 und 3 sind einfache Ausführungen der Verstellvorrichtung angegeben. Im Anspruch 5 ist eine einfache Ausführung des Fixierelements angegeben. Die Merkmale gemäß Anspruch 6 ermöglichen auf einfache Weise die Erzeugung einer der durch die Verstellvorrichtung erzeugten Verstellkraft entgegen wirkenden Rückstellkraft.In the dependent claims are advantageous Embodiments and developments of the invention Internal gear pump specified. In claims 2 and 3 are simple versions of the adjustment specified. in the Claim 5 is a simple embodiment of the fixing element specified. The features of claim 6 allow on easy way of generating one of the Adjusting device generated adjusting acting restoring force.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine Innenzahnradpumpe in einem Querschnitt entlang Linie I-I in Figur 2 und Figur 2 die Innenzahnradpumpe in einem Querschnitt entlang Linie II-II in Figur 1.An embodiment of the invention is in the drawing shown and in the following description in more detail explained. 1 shows an internal gear pump in one Cross-section along line I-I in Figure 2 and Figure 2 the Internal gear pump in a cross section along line II-II in FIG. 1

Beschreibung des AusführungsbeispielsDescription of the embodiment

Eine in den Figuren 1 und 2 dargestellte Innenzahnradpumpe dient vorzugsweise zum Fördern von Kraftstoff aus einem Vorratsbehälter zu einer Kraftstoffhochdruckpumpe oder einer Kraftstoffeinspritzpumpe eines Kraftstoffeinspritzsystems einer Brennkraftmaschine. Die Brennkraftmaschine ist vorzugsweise eine selbstzündende Brennkraftmaschine und der von der Innenzahnradpumpe geförderte Kraftstoff ist Dieselkraftstoff. Die Innenzahnradpumpe weist ein beispielsweise zweiteiliges Gehäuse mit einem Gehäuseteil 10 und einem mit diesem mittels Schrauben 12 verbundenen Deckelteil 14 auf. Das Gehäuseteil 10 und das Deckelteil 14 können beispielsweise aus Metall, wie Stahl oder Aluminium bestehen und als Gußteil ausgebildet sein. Das Gehäuseteil 10 weist an seiner dem Deckelteil 14 zugewandten Seite eine Vertiefung 16 auf, die im Querschnitt zumindest annähernd kreisförmig ausgebildet ist. Vom Boden der Vertiefung 16 steht am Gehäuseteil 10 einstückig zumindest annähernd zentral ein Zapfen 18 ab. Das Deckelteil 14 weist an seiner dem Gehäuseteil 10 zugewandten Seite ebenfalls eine Vertiefung 20 auf, die zumindest annähernd deckungsgleich mit der Vertiefung 16 des Gehäuseteils 10 angeordnet und ausgebildet ist. Durch das Gehäuseteil 10 und das Deckelteil 14 wird mit deren Vertiefungen 16 und 20 im Gehäuse eine Kammer begrenzt. Das Deckelteil 14 weist eine zum Zapfen 18 des Gehäuseteils 10 koaxiale Öffnung 22 auf. Durch die Öffnung 22 des Deckelteils 14 ragt eine Antriebswelle 24 von außen in das Gehäuse hinein, die mit ihrem Endbereich in einer Bohrung 26 im Zapfen 18 gelagert ist.An illustrated in Figures 1 and 2 internal gear pump is preferably for conveying fuel from a Reservoir to a high-pressure fuel pump or a Fuel injection pump of a fuel injection system an internal combustion engine. The internal combustion engine is preferably a self-igniting internal combustion engine and the is funded by the internal gear pump fuel Diesel fuel. The internal gear pump has a For example, two-piece housing with a housing part 10th and one connected thereto by means of screws 12 Cover part 14 on. The housing part 10 and the cover part 14 For example, metal, such as steel or aluminum exist and be designed as a casting. The housing part 10 has on its side facing the cover part 14 a side Recess 16, which in cross section at least approximately is circular. From the bottom of the recess 16 is on the housing part 10 in one piece at least approximately centrally a pin 18 from. The lid part 14 has at its the housing part 10 side facing also a Well 20, which at least approximately congruent arranged with the recess 16 of the housing part 10 and is trained. Through the housing part 10 and the cover part 14 is with their recesses 16 and 20 in the housing a Chamber limited. The cover part 14 has a pin 18 of the housing part 10 coaxial opening 22. By the Opening 22 of the cover part 14 protrudes a drive shaft 24 of outside into the housing, with its end in a bore 26 is mounted in the pin 18.

Auf dem Zapfen 18 des Gehäuseteils 10 ist ein Zahnritzel 30 um eine Achse 32 drehbar gelagert, das mit einer Außenverzahnung versehen ist. Das Zahnritzel 30 ist über wenigstens ein Kopplungselement 34 drehschlüssig mit der Antriebswelle 24 verbunden. Das Zahnritzel 30 umgebend ist ein Zahnring 36 angeordnet, der mit einer Innenverzahnung versehen ist, die mit der Außenverzahnung des Zahnritzels 30 kämmt. Die Außenverzahnung des Zahnritzels 30 weist einen Zahn weniger auf als die Innenverzahnung des Zahnrings 36. Der Zahnring 36 weist an seinem Außenumfang einen kreisförmigen Querschnitt auf und ist über diesen in einer Bohrung 38 eines den Zahnring 36 umgebenden Lagerrings 40 um eine Achse 42 drehbar gelagert. Die Drehachse 42 des Zahnrings 36 verläuft parallel zur Drehachse 32 des Zahnritzels 30, ist zu dieser jedoch um einen Abstand a versetzt. Die Bohrung 38 ist im Lagerring 40 exzentrisch zu dessen kreisförmigem Außenquerschnitt ausgebildet. Das Zahnritzel 30 und der Zahnring 36 sind in den Vertiefungen 16,20 zwischen dem Gehäuseteil 10 und dem Deckelteil 14 in Richtung ihrer Drehachse 32 bzw. 42 mit geringem Spiel angeordnet. Das Zahnritzel 30, der Zahnring 36 und der Lagerring 40 bestehen vorzugsweise aus Stahl, beispielsweise Sinterstahl.On the pin 18 of the housing part 10 is a pinion 30th about an axis 32 rotatably mounted, with a External teeth is provided. The pinion 30 is over at least one coupling element 34 rotationally with the Drive shaft 24 connected. The pinion 30 is surrounding a toothed ring 36 is arranged, which with an internal toothing is provided with the external teeth of the pinion 30th combs. The external teeth of the pinion 30 has a Tooth less on than the internal toothing of the toothed ring 36th The toothed ring 36 has on its outer periphery a circular cross section and is above this in one Bore 38 of the toothed ring 36 surrounding bearing ring 40 to an axle 42 rotatably mounted. The axis of rotation 42 of Tooth ring 36 is parallel to the axis of rotation 32 of the Zahnritzels 30, but this is by a distance a added. The bore 38 is eccentric in the bearing ring 40 to whose circular outer cross section is formed. The Pinion 30 and the toothed ring 36 are in the recesses 16,20 between the housing part 10 and the cover part 14 in Direction of its axis of rotation 32 and 42 with little play arranged. The pinion 30, the toothed ring 36 and the Bearing ring 40 are preferably made of steel, for example Sintered steel.

Der Lagerring 40 weist gegenüber den Vertiefungen 16 und 20 des Gehäuseteils 10 und des Deckelteils 14 einen etwas kleineren Querschnitt auf. Der Lagerring 40 weist in seinem Außenmantel zwei axial zueinander versetzte Ringnuten 44 auf, in die jeweils ein elastischer Ring 46 eingelegt ist. Der Lagerring 40 stützt sich über die Ringe 46, die über den Außenmantel des Lagerrings 40 hinausragen, an den Innenmantelflächen der Vertiefungen 16 und 20 ab. Die Ringe 46 sind zwischen dem Außenmantel des Lagerrings 40 und den Innenrändernd der Vertiefungen 16,20 eingespannt. Das Zahnritzel 30 wird über die Antriebswelle 24 um die Achse 32 rotierend angetrieben. Durch den Zahneingriff des Zahnritzels 30 mit dem Zahnring 36 wird dieser ebenfalls um seine Achse 42 rotierend angetrieben. Durch die versetzte Lage der Drehachse 42 des Zahnrings 36 zur Drehachse 32 des Zahnritzels 30 ergeben sich zwischen den Verzahnungen sich periodisch vergrößernde und verkleinernde Kammern, wodurch durch das Zahnritzel 30 und den Zahnring 36 Kraftstoff von einer Saugseite 48 zu einer Druckseite 49 gefördert wird. The bearing ring 40 faces the depressions 16 and 20 the housing part 10 and the cover part 14 a something smaller cross-section on. The bearing ring 40 has in his Outer jacket two axially staggered annular grooves 44th on, in each of which an elastic ring 46 is inserted. The bearing ring 40 rests on the rings 46, which over the Outer shell of the bearing ring 40 protrude to the Inner lateral surfaces of the recesses 16 and 20 from. The Rings 46 are between the outer shell of the bearing ring 40 and the Inner edges of the recesses 16,20 clamped. The Pinion 30 is about the drive shaft 24 about the axis 32nd driven in rotation. By the tooth engagement of the Zahnritzels 30 with the toothed ring 36 this is also around its axis 42 driven in rotation. By the staggered Position of the axis of rotation 42 of the toothed ring 36 to the axis of rotation 32 of the Zahnritzels 30 arise between the teeth themselves periodically increasing and decreasing chambers, thereby by the pinion 30 and the toothed ring 36 fuel from a suction side 48 is conveyed to a pressure side 49.

Eine Abdichtung der Kammer zwischen dem Gehäuseteil 10 und dem Deckelteil 14, in der das Zahnritzel 30 und der Zahnring 36 angeordnet sind, wird durch die Ringe 46 erreicht. Die Saugseite 48 wird von der Druckseite 49 durch die aufeinander gleitenden Verzahnungen des Zahnritzels 30 und des Zahnrings 36 getrennt. Es ist daher erforderlich, daß zwischen den Verzahnungen der Zahnritzels 30 und des Zahnrings 36 ein möglichst geringes radiales Spiel b vorhanden ist und die Drehachse 32 des Zahnritzels 30 und die Drehachse 42 des Zahnrings 36 in radialer Richtung zu den Drehachsen 32,42 genau zueinander ausgerichtet sind.A seal of the chamber between the housing part 10 and the lid part 14, in which the pinion 30 and the toothed ring 36 are arranged, is achieved by the rings 46. The Suction side 48 is from the pressure side 49 through the on each other sliding teeth of the pinion 30 and of the toothed ring 36 separately. It is therefore necessary that between the teeth of the pinion 30 and the Tooth ring 36 the lowest possible radial clearance b is present and the axis of rotation 32 of the pinion 30 and the axis of rotation 42 of the toothed ring 36 in the radial direction the axes of rotation 32,42 are aligned exactly to each other.

Erfindungsgemäß ist dem Lagerring 40 eine Verstellvorrichtung 50 zugeordnet, mittels der der Lagerring 40 und damit der in diesem gelagerte Zahnring 36 in einer radialen Richtung bezüglich der Drehachsen 32,42 zu einer Verstellung bewegbar und in einer eingestellten Lage blockierbar ist. Die Richtung, in der der Lagerring 40 mittels der Verstellvorrichtung bewegbar ist, ist in Figur 2 mit dem Doppelpfeil 52 verdeutlicht. Die Verstellrichtung 52 ist sowohl zur Drehachse 42 des Zahnrings 36 als auch zur Drehachse 32 des Zahnritzels 30 radial. Die Verstellvorrichtung 50 ist auf der der Drehachse 42 des Zahnrings 36 gegenüberliegenden Seite der Drehachse 32 des Zahnritzels 30 angeordnet.According to the bearing ring 40 is a Adjusting device 50 assigned by means of the bearing ring 40 and thus the mounted in this toothed ring 36 in one radial direction with respect to the axes of rotation 32,42 to a Adjustment movable and in a set position is blockable. The direction in which the bearing ring 40 is movable by means of the adjusting device is in Figure 2 illustrated by the double arrow 52. The adjustment 52 is both to the axis of rotation 42 of the toothed ring 36 and the Rotary axis 32 of the pinion 30 radially. The Adjustment device 50 is on the axis of rotation 42 of the Tooth ring 36 opposite side of the axis of rotation 32 of the Zahnritzels 30 arranged.

Die Verstellvorrichtung 50 weist ein mit dem Lagerring 40 fest verbundenes Verstellelement 54 auf. Das Verstellelement 54 ist beispielsweise mit einem von diesem abstehenden Bolzen 56 in eine Bohrung 58 im Außenmantel des Lagerrings 40 zwischen den beiden Ringnuten 44 eingeschraubt oder eingepresst. Das Verstellelement 54 weist einen mit dem Bolzen 56 vorzugsweise einstückigen schieberförmigen Abschnitt 60 auf. Im Gehäuseteil 10 und dem Deckelteil 14 ist jeweils eine von deren Vertiefung 16 bzw. 20 abführende Nut 62 ausgebildet, wobei die Tiefe der Nuten 62 in Richtung der Drehachsen 32,42 geringer ist als die Tiefe der Vertiefungen 16,20. Die Nuten 62 weisen ausgehend von den Rändern der Vertiefungen 16,20 zunächst einen Bereich 62a mit geringer Breite und anschließend einen Bereich 62b mit größerer Breite auf.The adjusting device 50 has a with the bearing ring 40th firmly connected adjusting 54 on. The adjusting element For example, with one of these protruding Bolt 56 in a bore 58 in the outer casing of the bearing ring 40 screwed between the two annular grooves 44 or pressed. The adjusting element 54 has a with the Bolt 56 preferably integral slide-shaped Section 60 on. In the housing part 10 and the cover part 14th is in each case a laxative of their depression 16 and 20 respectively Groove 62 formed, wherein the depth of the grooves 62 in the direction the axes of rotation 32,42 is less than the depth of Depressions 16,20. The grooves 62 have starting from the Edge of the recesses 16,20 first a portion 62a with a small width and then with an area 62b larger width.

Der Schieberabschnitt 60 des Verstellelements 54 ist zwischen den Nuten 62 in deren Bereichen 62b verschiebbar geführt. Die Breite des Schieberabschnitts 60 ist nur wenig kleiner als die Breite der Bereiche 62b der Nuten 62, so daß der Schieberabschnitt 60 mit geringem Spiel geführt ist. In der Verstellrichtung 52 ist die Länge der Bereiche 62b der Nuten 62 größer als die Länge des Schieberabschnitts 60, so daß dieser in der Verstellrichtung 52 in den Bereichen 62b verschoben werden kann. Die Bereiche 62b der Nuten 62 und der Schieberabschnitt 60 des Verstellelements 54 können im Querschnitt wie in Figur 2 dargestellt beispielsweise etwa rechteckförmig ausgebildet sein, wobei die Ecken gerundet sind. Der Bolzen 56 des Verstellelements 54 tritt durch die Bereiche 62a der Nuten 62 hindurch.The slider portion 60 of the adjustment 54 is slidable between the grooves 62 in their areas 62b guided. The width of the slider portion 60 is little smaller than the width of the portions 62b of the grooves 62, so that the slider portion 60 is guided with little play. In the adjustment 52 is the length of the areas 62 b of Grooves 62 greater than the length of the slide portion 60, so that this in the adjustment direction 52 in the areas 62b can be moved. The areas 62b of the grooves 62 and the slide portion 60 of the adjusting 54 can in Cross section as shown in Figure 2, for example, approximately be formed rectangular, the corners rounded are. The bolt 56 of the adjusting element 54 passes through the Areas 62 a of the grooves 62 therethrough.

Das Verstellelement 54 weist in seinem Schieberabschnitt 60 eine Ausnehmung 64 beispielsweise in Form eines Durchbruchs oder einer Bohrung auf. Die Ausnehmung 64 erstreckt sich in Richtung der Drehachsen 32,42. In die Ausnehmung 64 greift ein Fixierelement 66 ein, das beispielsweise als eine in einer Gewindebohrung 68 im Gehäuseteil 10 eingeschraubte Stellschraube ausgebildet ist. Die Stellschraube 66 ragt bis auf die Außenseite des Gehäuseteils 10 und ist dort zugänglich, so daß an dieser mittels eines Werkzeugs angegriffen und diese verdreht werden kann. Die Stellschraube 66 kann an ihrem aus dem Gehäuseteil 10 ragenden Ende beispielsweise einen Quer- oder Kreuzschlitz aufweisen, in den eine entsprechende Klinge eines Schraubendrehers eingeführt werden kann. Bei einer Verdrehung wird die Stellschraube 66 infolge der Gewindeverbindung mit dem Gehäuseteil 10 in Richtung ihrer Längsachse 67 bewegt. Die Stellschraube 66 kann ein selbstsicherndes Gewinde aufweisen, um sicherzustellen, daß diese nicht unbeabsichtigt, beispielsweise infolge von während des Betriebs der Innenzahnradpumpe auftretenden Erschütterungen, verdrehen kann, was eine Verstellung des radialen Spiels zu Folge hätte. Alternativ kann die Stellschraube 66 auch mittels einer auf deren aus dem Gehäuseteil 10 ragenden Endbereich aufgeschraubten Sicherungsmutter gegen Verdrehen gesichert werden.The adjusting element 54 has in its slide portion 60th a recess 64, for example in the form of an opening or a hole. The recess 64 extends in Direction of the axes of rotation 32,42. In the recess 64 engages a fixing element 66, which may be used as an in a threaded bore 68 in the housing part 10 screwed Adjusting screw is formed. The adjusting screw 66 protrudes on the outside of the housing part 10 and is there accessible, so that at this by means of a tool attacked and this can be twisted. The Adjusting screw 66 may at her from the housing part 10th projecting end, for example, a cross or Phillips in which a corresponding blade of a Screwdrivers can be introduced. At a Twist is the adjusting screw 66 due to Threaded connection with the housing part 10 in the direction of her Longitudinal axis 67 moves. The adjusting screw 66 can self-locking thread to ensure that not inadvertently, for example as a result of occurring during operation of the internal gear pump Shaking, can twist what an adjustment of the radial play would result. Alternatively, the Adjusting screw 66 also by means of a on the Housing part 10 projecting end portion screwed Locknut to be secured against rotation.

Die Ausnehmung 64 weist eine in radialer Richtung zu den Drehachsen 32,42 hin weisende Seitenfläche 70 auf, an der die Stellschraube 66 mit ihrem in die Ausnehmung 64 eingreifenden Endbereich anliegt. Die Seitenfläche 70 der Ausnehmung 64 ist zur Längsachse 67 der Stellschraube 66 derart geneigt angeordnet, daß die Seitenfläche 70 zum Deckelteil 14 hin sich der Längsachse 67 annähert. Die Ausnehmung 64 des Verstellelements 54 kann beispielsweise als eine zumindest annähernd kegelförmige Bohrung ausgebildet sein, wodurch die geneigte Anordnung der Seitenfläche 70 erreicht wird. Es kann auch vorgesehen sein, daß nur die Seitenfläche 70 der Ausnehmung 64 durch entsprechende Bearbeitung mittels eines Schleif- oder Fräswerkzeugs geneigt angeordnet ist. Die Seitenfläche 70 der Ausnehmung 64 kann auch als schiefe Ebene ausgebildet sein. Durch die an der Seitenfläche 70 anliegende Stellschraube 66 wird das Verstellelement 54 gegen eine durch die elastischen Ringe 46 bewirkte Rückstellkraft in einer definierten Lage im Gehäuse blockiert. Wenn die Stellschraube 66 mittels einer Verdrehung in Richtung ihrer Längsachse 67 bewegt wird, so taucht diese unterschiedlich weit in die Ausnehmung 64 ein, wobei durch die geneigte Seitenfläche 70 das Verstellelement 54 durch seinen Schieberabschnitt 60 in den Bereichen 62b der Nuten 62 geführt in Verstellrichtung 52 bewegt wird. Hierdurch erfolgt eine Verschiebung der Drehachse 42 des Zahnrings 36 und damit eine Einstellung des radialen Spiels zwischen dem Zahnring 36 und dem Zahnritzel 30. Durch Verdrehung der Stellschraube 66 kann somit von außerhalb des Gehäuses und nach dem kompletten Zusammenbau der Innenzahnradpumpe das radiale Spiel zwischen dem Zahnring 36 und dem Zahnritzel 30 auf den erforderlichen Wert eingestellt werden. Je weiter die Stellschraube 66 hinheingedreht wird, desto weiter wird das Verstellelement 54 von der Drehachse 42 des Zahnrings 36 weggezogen, dies ist in Figur 2 nach links, und desto kleiner wird das radiale Spiel b. Eine Rückstellkraft auf den Lagerring 40 wird durch die elastisch verformten Ringe 46 erzeugt, so daß bei einem Herausdrehen der Stellschraube 66 die Seitenfläche 70 der Ausnehmung 64 des Verstellements 54 in Anlage an der Stellschraube 66 bleibt, da das Verstellelement 54 über den Lagerring 40 zur Drehachse 42 des Zahnrings 36 hin gedrückt wird. Bei einem Herausdrehen der Stellschraube 66 wird somit der Lagerring 40 in Figur 2 nach rechts bewegt und das radiale Spiel b vergrößert.The recess 64 has a radial direction to the Rotary axes 32,42 side facing surface 70, at the the screw 66 with her in the recess 64th engaging end portion is applied. The side surface 70 of Recess 64 is to the longitudinal axis 67 of the screw 66th arranged inclined so that the side surface 70 for Lid 14 towards the longitudinal axis 67 approaches. The Recess 64 of the adjustment 54, for example as an at least approximately conical bore be formed, whereby the inclined arrangement of Side surface 70 is reached. It can also be provided that only the side surface 70 of the recess 64 through appropriate processing by means of a grinding or Milling tool is arranged inclined. The side surface 70 the recess 64 may also be formed as an inclined plane be. By the voltage applied to the side surface 70 Adjusting screw 66, the adjusting element 54 against a by the elastic rings 46 caused restoring force in blocked in a defined position in the housing. If the Adjusting screw 66 by means of a rotation in the direction of her Longitudinal axis 67 is moved, so this emerges differently far into the recess 64, wherein by the inclined Side surface 70, the adjusting element 54 through his Slider portion 60 in the areas 62 b of the grooves 62 guided in adjustment 52 is moved. hereby there is a displacement of the axis of rotation 42 of the toothed ring 36th and thus an adjustment of the radial clearance between the Tooth ring 36 and the pinion 30. By rotation of the Adjusting screw 66 can thus from outside the housing and after complete assembly of internal gear pump the radial clearance between the toothed ring 36 and the pinion 30th be set to the required value. The farther the set screw 66 is screwed in, the farther it gets the adjusting element 54 from the axis of rotation 42 of the toothed ring 36th pulled away, this is in Figure 2 to the left, and the more smaller is the radial play b. A restoring force the bearing ring 40 is replaced by the elastically deformed rings 46 generated so that when unscrewing the screw 66, the side surface 70 of the recess 64 of the adjusting 54 remains in contact with the adjusting screw 66, since the Adjustment element 54 via the bearing ring 40 to the rotation axis 42nd of the toothed ring 36 is pressed. When unscrewing the adjusting screw 66 thus becomes the bearing ring 40 in FIG. 2 moves to the right and increases the radial clearance b.

Bei der Orientierung der Seitenfläche 70 der Ausnehmung 64, an der die Stellschraube 66 anliegt, hin zu den Drehachsen 32,42 von Zahnritzel 30 und Zahnring 36 wird der Lagerring 40 durch die Stellschraube 66 gegen die Rückstellkraft der Ringe 46 in eine definierte Lage gezogen. Alternativ hierzu kann auch vorgesehen sein, daß die Stellschraube 66 an der gegenüberliegenden und von den Drehachsen 32,42 wegweisenden Seitenfläche der Ausnehmung 64 anliegt, die entsprechend geneigt zu der Längsachse 67 der Stellschraube 66 angeordnet ist. In diesem Fall wird der Lagerring 40 durch die Stellschraube 66 gegen die Rückstellkraft der Ringe 46 in eine definierte Lage gedrückt.In the orientation of the side surface 70 of the recess 64, at the the adjusting screw 66 is applied, towards the axes of rotation 32,42 of pinion 30 and ring gear 36 is the bearing ring 40 by the screw 66 against the restoring force of Pulled rings 46 in a defined position. Alternatively to this can also be provided that the screw 66 at the opposite and pointing away from the axes of rotation 32,42 Side surface of the recess 64 abuts, the corresponding inclined to the longitudinal axis 67 of the adjusting screw 66 is arranged is. In this case, the bearing ring 40 through the Adjusting screw 66 against the restoring force of the rings 46 in pressed a defined position.

Claims (8)

  1. Internal-gear pump having a housing (10, 14), having an annular gear (36) which is provided with internal toothing and is mounted in the housing (10, 14) via a bearing ring (40) so as to rotate about an axis (42), and having a gear wheel (30) which meshes with the annular gear (36), is provided with external toothing and is mounted in the housing (10, 14) so as to rotate about an axis (32), the gear wheel (30) or the annular gear (36) being driven in rotation and the rotational axis (42) of the annular gear (36) extending offset with respect to the rotational axis (32) of the gear wheel (30), characterized in that the bearing ring (40) is assigned an adjusting apparatus (50), by means of which it is possible to move the bearing ring (40) in the housing (10, 14) in a radial direction (52) with respect to the rotational axis (42) of the annular gear (36) for adjustment and to lock the said bearing ring (40) in a set position.
  2. Internal-gear pump according to Claim 1, characterized in that the adjusting apparatus (50) has an adjusting element (54) which is connected to the bearing ring (40), is guided in the housing (10, 14) so as to be displaceable in the radial direction (52) and on which a fixing element (66) acts which is connected to the housing (10), is accessible from the outer side of the housing (10) and by means of which it is possible to displace the adjusting element (54) in the radial direction (52) and to lock the said adjusting element (54) in the set position.
  3. Internal-gear pump according to Claim 2, characterized in that the adjusting element (54) has a recess (64) into which the fixing element (66) engages transversely with respect to the radial direction (52), in that the fixing element (66) rests on a lateral face (70) of the recess (64), which lateral face (70) points radially towards the rotational axis (42) of the annular gear (36) or points away from the latter, in that the fixing element (66) is connected to the housing (10) so as to be able to move in the direction of its longitudinal axis (67), and in that the lateral face (70) of the recess (64) extends inclined with respect to the longitudinal axis (67) of the fixing element (66), with the result that, when the fixing element (66) is moved in the direction of its longitudinal axis (67), a movement of the adjusting element (54) is brought about in the radial direction (52) via the inclined lateral face (70) of the recess (64).
  4. Internal-gear pump according to Claim 3, characterized in that the recess (64) of the adjusting element (54) is configured to be at least approximately conical.
  5. Internal-gear pump according to Claim 3 or 4, characterized in that the fixing element (66) is configured as an adjusting screw which is screwed into a threaded bore (68) of the housing (10) and, during a rotational movement, performs an adjusting movement in the direction of its longitudinal axis (67).
  6. Internal-gear pump according to one of the preceding claims, characterized in that the bearing ring (40) is mounted by at least one elastic ring (46) which is clamped in between the outer casing of the said bearing ring (40) and the housing (10, 14) and produces a restoring force on the bearing ring (40), which restoring force acts counter to the adjusting force produced on the bearing ring (40) by the adjusting apparatus (50).
  7. Internal-gear pump according to Claim 6, characterized in that the at least one ring (46) serves as a sealing element for sealing the housing (10, 14).
  8. Internal-gear pump according to one of the preceding claims, characterized in that the direction (52) in which it is possible to move the bearing ring (40) by means of the adjusting apparatus (50) is radial both with respect to the rotational axis (42) of the annular gear (36) and with respect to the rotational axis (32) of the gear wheel (30).
EP01120451A 2000-09-27 2001-08-28 Internal gear pump Expired - Lifetime EP1193395B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10047738 2000-09-27
DE10047738A DE10047738A1 (en) 2000-09-27 2000-09-27 Internal gear pump

Publications (3)

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EP1193395A2 EP1193395A2 (en) 2002-04-03
EP1193395A3 EP1193395A3 (en) 2003-05-07
EP1193395B1 true EP1193395B1 (en) 2004-11-03

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EP01120451A Expired - Lifetime EP1193395B1 (en) 2000-09-27 2001-08-28 Internal gear pump

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US (1) US6568930B2 (en)
EP (1) EP1193395B1 (en)
JP (1) JP4843168B2 (en)
DE (2) DE10047738A1 (en)

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KR100662806B1 (en) 2005-09-30 2006-12-28 현담산업 주식회사 Automobile fuel pump driven by motor
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JP4966638B2 (en) 2006-12-18 2012-07-04 日立オートモティブシステムズ株式会社 Oil pump and oil pump assembly method
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Also Published As

Publication number Publication date
JP4843168B2 (en) 2011-12-21
EP1193395A3 (en) 2003-05-07
EP1193395A2 (en) 2002-04-03
DE50104369D1 (en) 2004-12-09
JP2002155872A (en) 2002-05-31
US20020110468A1 (en) 2002-08-15
DE10047738A1 (en) 2002-04-11
US6568930B2 (en) 2003-05-27

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