EP1474611B1 - Liquid pump - Google Patents

Liquid pump Download PDF

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Publication number
EP1474611B1
EP1474611B1 EP02781135A EP02781135A EP1474611B1 EP 1474611 B1 EP1474611 B1 EP 1474611B1 EP 02781135 A EP02781135 A EP 02781135A EP 02781135 A EP02781135 A EP 02781135A EP 1474611 B1 EP1474611 B1 EP 1474611B1
Authority
EP
European Patent Office
Prior art keywords
housing
pump
pot
housing upper
web
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
EP02781135A
Other languages
German (de)
French (fr)
Other versions
EP1474611A1 (en
Inventor
Johannes Pfetzer
Bernhard Krause
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1474611A1 publication Critical patent/EP1474611A1/en
Application granted granted Critical
Publication of EP1474611B1 publication Critical patent/EP1474611B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/33—Retaining components in desired mutual position with a bayonet coupling

Definitions

  • the invention relates to a liquid pump, in particular a water pump, according to the preamble of claim 1.
  • a housing for motor pumps which is detachably mounted on a motor flange attached to the drive motor and carries both the axially arranged suction nozzle and the tangentially directed discharge nozzle.
  • the motor flange facing the edge of the housing and the motor flange have closure cams, which overlap after a be carried out with the housing rotational movement in the manner of a bayonet closure, wherein the housing is supported on a equipped with an elastic seal, the housing to the drive motor final seal carrier, the is arranged on one side sliding between him and the motor flange.
  • the FR 2185129 A also shows a motor pump, in which two housing half shells each having a circular groove, wherein the grooves of the two housing halves together form a pressure spiral within which rotates a pump.
  • the liquid pump according to the invention with the features of claim 1 has the advantage that only one seal is required to seal the pump housing and the motor housing and the contact pressure is generated on the seal without additional fastening means.
  • a single sealing ring takes over both functions, so the sealing of the pump housing against liquid leakage and the sealing of the motor housing against ingress of liquid from the outside.
  • the assembly and disassembly of the pump is extremely simple and can significantly reduce the costs for production and repair. Since no separate fasteners are required, the logistics of the assembly line can be simplified and assembly tools can be saved, which additionally contributes to reducing the cost price of the pump.
  • a relative rotation between the housing pot and the housing upper part brings them into engagement with each other, with increasing relative rotation uses an axial displacement movement, which causes a frictional compression of the sealing ring, and wherein the housing upper part and the lower housing part by means of a Positive locking connection positioned in the correct position and are fixed to each other non-rotatably.
  • This preferably made by a tongue and groove connection of housing lower and upper housing part serves on the one hand for mounting coding and on the other hand forms an anti-rotation during assembly, which ensures proper allocation of stator, motor housing and pump housing.
  • connection between the upper and lower housing part and the stator of the electric motor and the lower housing part of the pump housing are non-rotatably fixed to each other, wherein also here preferably a tongue and groove connection is provided, the same advantages as the tongue and groove connection between the housing upper and lower part offers.
  • the latching between the housing pot and the housing upper part of the pump housing according to Art a Boyonettver becomes formed and has on the housing upper part projecting, over the circumference of the housing upper part equidistantly arranged holding webs and formed on the pot edge of the housing pot undercuts, which can be brought together by positive rotation of the housing pot and housing shell in non-positive and positive engagement.
  • the housing upper part preferably arranged on a holding web, at least one axially projecting stop on which abuts one of the undercuts at the end of the required relative to the locking relative rotation of the housing pot and pump housing.
  • an anti-rotation device is provided between the housing pot and the housing upper part, which is effective after production of the latching with the application of an undercut to the stop of the housing upper part and connects housing pot and pump housing non-rotatable. This rotation ensures that even in rough operation, the connection between the housing upper part and the housing pot does not accidentally dissolves.
  • the pot bottom of the housing pot is provided with a circumferentially extending slot through which the winding terminals of the stator are passed.
  • This slot allows the relative rotation between the housing pot and the rotatably connected to the pump housing stator of the electric motor, which is required for locking of the housing pot and housing upper part of the pump housing.
  • the slot is from a Covered electronics housing, in which the control electronics for the electric motor is integrated.
  • Fig. 1 shown in perspective water pump as an exemplary embodiment of a general liquid pump is preferably used in automotive engineering in the cooling circuit of the internal combustion engine or in the heating circuit of the heating system. It has a two-part pump housing 11, which is composed of a housing lower part 12 and a housing upper part 13 pushed thereon.
  • the housing lower part 12 bears at the edge a radially outwardly projecting annular web 14, which abut as the system for the annular front end of the housing upper part 13 and a between the annular web 14 and the front end of the housing upper part 13, on the jacket of the housing lower part 12 pushed-sealing ring 15 is used.
  • an inlet opening 161 enclosing, axial intake manifold 16 and an outlet opening 171 enclosing, tangentially wegstrebender outlet 17 is formed on the upper housing part 13.
  • a spiral groove 181, 182 is formed in each of the two housing parts 12, 13, a spiral groove 181, 182 is formed.
  • the on top of the housing lower part 12 slid housing upper part 13 congruent superimposed two grooves 181, 182 form a opening into the intake manifold 16 pressure spiral 18 (FIG. Fig. 5 ).
  • Fig. 4 only the groove 181 of the pressure spiral 18 formed in the lower housing part 12 can be seen, which is covered by the groove 182 of the pressure spiral 18, which is formed identically in the housing upper part 13, whereby the pressure-side outlet nozzle 17 projects over the one half of the outlet opening 171 forming mouth edge of the lower groove 181 of the pressure coil 18 pushes.
  • an impeller 19 is arranged, the non-rotatably mounted on a coaxially projecting into the pump housing 11 output shaft 20 of an electric motor 21 sits.
  • the rotating impeller 19 draws on the intake manifold 16 axially water and promotes this in the pressure coil 18, from which the water flows through the outlet port 17 with delivery pressure.
  • the electric motor 21 consists in a known manner of a stator 22 (FIG. Fig. 4 ) and a rotor, not shown here, which is annularly enclosed by the stator 22.
  • the stator 22 carries a stator winding 23, which has winding connections 24, 25 (FIG. Fig. 2 ) can be energized.
  • the electric motor 21 is accommodated in a housing pot 26 which engages over the annular web 14 on the housing lower part 12, the sealing ring 15 and partially the housing upper part 13 and with the housing upper part 13 to produce an axial clamping force between the housing upper part 12 and the housing pot 26 is locked.
  • an annular support shoulder 27 (FIG. Fig.
  • the housing pot 26 has in its pot bottom 262 ( Fig. 2 ) extending in the circumferential direction slot 29 through which the winding terminals 24, 25 of the stator winding 23 are passed.
  • an electronics housing is placed on the bottom of the pot 261, which covers the slot 29 and contains the Anberichtelektronik to be connected to the Wicklungsanschlüsssen 24, 25, for example, for the speed control for the electric motor 21.
  • the latching between the housing cup 26 and housing upper part 13 is formed in the manner of a bayonet closure and has on the housing upper part 13 on the circumference of equidistantly arranged holding webs 30 and formed on the overlap edge 28 undercuts 31.
  • Holding webs 30 and undercuts 31 are brought together by relative rotation of the housing pot 26 and housing upper part 13 of the pump housing 11 in engagement, with increasing relative rotation of an axial Displacement movement of the two components used, which causes a frictional compression of the ring web 14 and the front end of the housing upper part 13 inserted sealing ring 15.
  • the twisting movement is controlled by a stop 32 (FIG. Fig. 1 and 3 ), which is formed on one of the retaining webs 30 and protrudes axially into the twist path of the undercuts 31.
  • the latching of the housing pot 26 and the housing upper part 13 of the pump housing 11 produced is ensured by an anti-rotation 33 ( Fig. 1 . 3 and 6 ).
  • the anti-rotation device 33 has a housing on the upper part 13 outwardly projecting axially elastically deformable web 34 which is disposed between two successive support webs 30 so that it when sliding the housing pot 36 on the housing upper part 13 by one of the undercuts 31 elastic is deflected.
  • the installation of the water pump is carried out as follows:
  • Fig. 4 illustrated pre-assembly, consisting of the lower housing part 12, the electric motor 21 with stator 22, rotor and output shaft 20 of the trained as an O-ring sealing ring 15 is mounted by this on the jacket of the housing base 12 until it rests against the annular web 14 of the Housing base 12 is pushed with slight elongation.
  • the stator 22 and the housing lower part 12 are secured by a groove / spring connection 35 against relative rotation to each other.
  • Groove / spring connection 35 serves as a mounting coding for the correct rotational position assignment of stator 22 and lower housing part 12th
  • the housing upper part 13 is pushed ( Fig. 3 ).
  • the housing lower part 12 and the housing upper part 13 are non-rotatably fixed to each other by a tongue and groove connection 36, which simultaneously serves as a mounting coding for the correct positioning of the housing upper part 13 and the housing lower part 12 during pushing. From the tongue and groove connection 36 is in Fig. 4 only to see the axially extending groove in the housing base 12.
  • the housing pot 26 is pushed onto the stator 22 ( Fig. 3 ), wherein the overlapping edge 28 on the pot opening 261 increasingly engages over the annular web 14, the sealing ring 15 and the housing upper part 13 and the undercuts 31 at the overlapping edge 28 push through between the holding webs 30 on the housing upper part 13.
  • the winding terminals 24, 25 of the stator winding 23 pass through the slot 29.
  • the sliding of the housing pot 26 is completed when the housing pot 27 and the housing base 12 abut against the support shoulder 27. Now, by a rotational movement of the housing pot 26, the undercuts 31 are rotated in front of the holding webs 30, wherein the rotational movement is limited by the stop 32.
  • the sealing ring 15 is axially compressed and reliably seals both the pump housing 11 against water leakage and the housing pot 26 against ingress of water. Strikes an undercut 31 in the twisting movement of the housing pot 26 to the stop 32, the rotational movement of the housing pot 26 is blocked and the elastically deflected by an undercut 31 web 34 of rotation 33 is released from the undercut 31 again, so that the web 34th spring back to its original position and by grasping behind the Undercut 31 in the circumferential direction prevents rotation of the housing pot 26 ( Fig. 1 and 6 ).
  • a bayonet connection is characterized in that the holding webs 30 and / or the undercuts 31 have an axial depth increasing in the direction of rotation in order to generate an axial clamping force and thus a contact pressure on the sealing ring 15 when the two parts to be joined together are rotated ,
  • the locking can also be carried out with retaining webs and undercuts having a constant axial width or thickness.
  • the axial assignment of the holding webs 30 on the housing upper part 13 and the undercuts 31 on the housing pot 26 must be made so that during assembly before and during rotation of the housing pot 26 and pump housing 11, a sealing ring 15 compressive force must be applied so that the undercuts 31 on the housing pot 26 can be rotated in front of the retaining webs 30 on the housing upper part 13.

Abstract

The invention relates to a liquid pump, especially a water pump, comprising a pump housing (11) surrounding a pump wheel and an engine housing connected thereto, wherein an electric motor (21) driving the pump wheel is arranged with a stator (22) and a rotor. The pump housing (11) comprises a lower part (12) with an annular flange (14) extending radially in an outward direction, and an upper part (13) which is arranged on the lower part (12) in order to seal the pump against leaks of liquid and to seal the motor housing against liquid penetration and to enable the sealing and mounting of the liquid pump without the addition of connecting elements. A sealing ring (15) is arranged between the free, annular-shaped face end of the upper part of the housing (13) and the annular flange (14). Said motor housing is embodied in the form of a cup (26), which overlaps the edge (28) of the annular flange (14), the sealing ring (15) and partially the upper part of the housing (13) and engages with the upper part of the housing (13), whereby an axial tensing force is produced.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Flüssigkeitspumpe, insbesondere einer Wasserpumpe, nach dem Oberbegriff des Anspruchs 1.The invention relates to a liquid pump, in particular a water pump, according to the preamble of claim 1.

Bei solchen Flüssigkeitspumpen besteht die Notwendigkeit der Abdichtung des Pumpengehäuses gegen Austritt von Flüssigkeit und das Abdichten des Motorgehäuses gegen Eindringen von Flüssigkeit, z. B. Spritzwasser, von außen. Hierzu ist es bekannt, das Motorgehäuse nach Montage des Elektromotors mit einer Gehäusekappe spritzwasserdicht zu verschließen und das Pumpengehäuse mittels eines Deckelflansches und einer Dichtungseinlage gegen Flüssigkeitsaustritt dicht abzudecken. Die für die Dichtverbindung erforderliche Druckkraft zwischen Deckelflansch und Pumpengehäuse wird durch Schraubverbindungen hergestellt, die um gleiche Umfangswinkel gegeneinander versetzt angeordnet sind. Das Motorgehäuse ist an dem Deckelflansch befestigt und die Abtriebswelle des Elektromotors ist abgedichtet durch den Deckelflansch hindurchgeführt und nimmt im Innern des Pumpengehäuses das Pumpenrad drehfest auf.In such liquid pumps, there is a need to seal the pump housing against leakage of liquid and the sealing of the motor housing against ingress of liquid, eg. B. splash, from the outside. For this purpose, it is known to seal the motor housing splash-proof after installation of the electric motor with a housing cap and tightly cover the pump housing by means of a cover flange and a gasket against liquid leakage. The pressure force required between the cover flange and the pump housing for the sealing connection is produced by screw connections which are offset from one another by equal circumferential angles. The motor housing is attached to the cover flange and the output shaft of the electric motor is sealed passed through the cover flange and rotatably receives the impeller inside the pump housing.

Aus der DE-A-1959 087 ist weiterhin ein Gehäuse für Motorpumpen bekannt, das an einem am Antriebsmotor befestigten Motorflansch lösbar aufgesetzt ist und sowohl den axial angeordneten Saugstutzen als auch den tangential gerichteten Druckstutzen trägt. Der dem Motorflansch zugekehrte Rand des Gehäuses sowie der Motorflansch besitzen Verschlussnocken, die nach einer mit dem Gehäuse vorzunehmenden Drehbewegung in der Art eines Bajonettverschlusses übereinandergreifen, wobei sich das Gehäuse auf einem mit einer elastischen Dichtung ausgestatteten, das Gehäuse zum Antriebsmotor hin abschließenden Dichtungsträger abstützt, der zwischen ihm und dem Motorflansch einseitig gleitend angeordnet ist.From the DE-A-1959 087 Furthermore, a housing for motor pumps is known, which is detachably mounted on a motor flange attached to the drive motor and carries both the axially arranged suction nozzle and the tangentially directed discharge nozzle. The motor flange facing the edge of the housing and the motor flange have closure cams, which overlap after a be carried out with the housing rotational movement in the manner of a bayonet closure, wherein the housing is supported on a equipped with an elastic seal, the housing to the drive motor final seal carrier, the is arranged on one side sliding between him and the motor flange.

Die FR 2185129 A zeigt zudem eine Motorpumpe, bei der zwei Gehäusehalbschalen jeweils eine zirkulare Rille aufweisen, wobei die Rillen der beiden Gehäusehalbschalen zusammen eine Druckspirale bilden, innerhalb der ein Pumpenrad rotiert.The FR 2185129 A also shows a motor pump, in which two housing half shells each having a circular groove, wherein the grooves of the two housing halves together form a pressure spiral within which rotates a pump.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Flüssigkeitspumpe mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass zum Abdichten des Pumpengehäuses und des Motorgehäuses nur eine Dichtung erforderlich ist und die Anpresskraft auf die Dichtung ohne zusätzliche Befestigungsmittel erzeugt wird. Ein einziger Dichtungsring übernimmt beide Funktionen, also das Abdichten des Pumpengehäuses gegen Flüssigkeitsaustritt und das Abdichten des Motorgehäuses gegen Eindringen von Flüssigkeit von außen. Die Montage und Demontage der Pumpe ist extrem einfach und lässt die Kosten für Fertigung und Reparatur deutlich sinken. Da keine separaten Befestigungsmittel erforderlich sind, können die Logistik der Montagestraße vereinfacht und Montagewerkzeuge eingespart werden, was zusätzlich zur Senkung der Gestehungskosten der Pumpe beiträgt.The liquid pump according to the invention with the features of claim 1 has the advantage that only one seal is required to seal the pump housing and the motor housing and the contact pressure is generated on the seal without additional fastening means. A single sealing ring takes over both functions, so the sealing of the pump housing against liquid leakage and the sealing of the motor housing against ingress of liquid from the outside. The assembly and disassembly of the pump is extremely simple and can significantly reduce the costs for production and repair. Since no separate fasteners are required, the logistics of the assembly line can be simplified and assembly tools can be saved, which additionally contributes to reducing the cost price of the pump.

Erfindungsgemäß ist weiterhin vorgesehen, dass eine Relativverdrehung zwischen Gehäusetopf und Gehäuse-Oberteil diese miteinander in Eingriff bringt, wobei mit zunehmender Relativverdrehung eine axiale Verschiebebewegung einsetzt, die eine kraftschlüssige Pressung des Dichtungsrings bewirkt, und wobei das Gehäuse-Oberteil und das Gehäuse-Unterteil mittels einer Formschlussverbindung zueinander lagerichtig positioniert und aneinander undrehbar festgelegt sind. Diese vorzugsweise durch eine Nut/Feder-Verbindung vorgenommene Verbindung von Gehäuse-Unter- und Gehäuse-Oberteil dient einerseits zur Montagecodierung und bildet andererseits eine Verdrehsicherung bei der Montage, die eine richtige Zuordnung von Stator, Motorgehäuse und Pumpengehäuse gewährleistet.According to the invention it is further provided that a relative rotation between the housing pot and the housing upper part brings them into engagement with each other, with increasing relative rotation uses an axial displacement movement, which causes a frictional compression of the sealing ring, and wherein the housing upper part and the lower housing part by means of a Positive locking connection positioned in the correct position and are fixed to each other non-rotatably. This preferably made by a tongue and groove connection of housing lower and upper housing part serves on the one hand for mounting coding and on the other hand forms an anti-rotation during assembly, which ensures proper allocation of stator, motor housing and pump housing.

Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Pumpe möglich.The measures listed in the further claims advantageous refinements and improvements of the claim 1 pump are possible.

So sind gemäß einer vorteilhaften Ausführungsform der Erfindung entsprechend der Verbindung zwischen Gehäuse-Ober- und Unterteil auch der Stator des Elektromotors und das Gehäuse-Unterteil des Pumpengehäuses undrehbar aneinander festgelegt, wobei auch hier vorzugsweise eine Nut/Feder-Verbindung vorgesehen ist, die dieselben Vorteile wie die Nut/Feder-Verbindung zwischen Gehäuse-Ober- und Unterteil bietet.Thus, according to an advantageous embodiment of the invention corresponding to the connection between the upper and lower housing part and the stator of the electric motor and the lower housing part of the pump housing are non-rotatably fixed to each other, wherein also here preferably a tongue and groove connection is provided, the same advantages as the tongue and groove connection between the housing upper and lower part offers.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist die Verrastung zwischen Gehäusetopf und Gehäuse-Oberteil des Pumpengehäuses nach Art eines Boyonettverschlüsses ausgebildet und weist am Gehäuse-Oberteil abstehende, über den Umfang des Gehäuse-Oberteils äquidistant angeordnete Haltestege und am Topfrand des Gehäusetopfs ausgebildete Hinterschnitte auf, die durch Relativverdrehung von Gehäusetopf und Gehäuse-Oberteil miteinander in kraft- und formschlüssigen Eingriff bringbar sind.According to an advantageous embodiment of the invention, the latching between the housing pot and the housing upper part of the pump housing according to Art a Boyonettverschlüsses formed and has on the housing upper part projecting, over the circumference of the housing upper part equidistantly arranged holding webs and formed on the pot edge of the housing pot undercuts, which can be brought together by positive rotation of the housing pot and housing shell in non-positive and positive engagement.

Dabei ist gemäß einer vorteilhaften Ausführungsform der Erfindung am Gehäuse-Oberteil, vorzugsweise an einem Haltesteg, mindestens ein axial abstehender Anschlag angeordnet, an dem einer der Hinterschnitte am Ende der zur Verrastung erforderlichen Relativverdrehung von Gehäusetopf und Pumpengehäuse anschlägt. Diese Begrenzung der relativen Drehbewegung zwischen Gehäusetopf und Pumpengehäuse ist wichtig, damit das Motorgehäuse immer eine bestimmte Position zum Stator hat und die spätere Montage der Ansteuerelektronik für den Motor am Motorgehäuse problemlos vorgenommen werden kann.In this case, according to an advantageous embodiment of the invention on the housing upper part, preferably arranged on a holding web, at least one axially projecting stop on which abuts one of the undercuts at the end of the required relative to the locking relative rotation of the housing pot and pump housing. This limitation of the relative rotational movement between the housing pot and pump housing is important so that the motor housing always has a specific position to the stator and the later mounting of the drive electronics for the motor can be easily made on the motor housing.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist zwischen Gehäusetopf und Gehäuse-Oberteil eine Verdrehsicherung vorgesehen, die nach Herstellung der Verrastung mit Anlegen eines Hinterschnitts an den Anschlag des Gehäuse-Oberteils wirksam ist und Gehäusetopf und Pumpengehäuse undrehbar miteinander verbindet. Durch diese Verdrehsicherung ist gewährleistet, daß sich auch bei rauher Betriebsweise die Verbindung zwischen Gehäuse-Oberteil und Gehäusetopf nicht unbeabsichtigt löst.According to an advantageous embodiment of the invention, an anti-rotation device is provided between the housing pot and the housing upper part, which is effective after production of the latching with the application of an undercut to the stop of the housing upper part and connects housing pot and pump housing non-rotatable. This rotation ensures that even in rough operation, the connection between the housing upper part and the housing pot does not accidentally dissolves.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der Topfboden des Gehäusetopfes mit einem in Umfangsrichtung sich erstreckenden Langloch versehen, durch das die Wicklungsanschlüsse des Stators hindurchgeführt sind. Dieses Langloch ermöglicht die Relativverdrehung zwischen dem Gehäusetopf und dem mit dem Pumpengehäuse drehfest verbundenen Stator des Elektromotors, die zur Verrastung von Gehäusetopf und Gehäuse-Oberteil des Pumpengehäuses erforderlich ist. Das Langloch wird von einem Elektronikgehäuse überdeckt, in dem die Ansteuerelektronik für den Elektromotor integriert ist.According to an advantageous embodiment of the invention, the pot bottom of the housing pot is provided with a circumferentially extending slot through which the winding terminals of the stator are passed. This slot allows the relative rotation between the housing pot and the rotatably connected to the pump housing stator of the electric motor, which is required for locking of the housing pot and housing upper part of the pump housing. The slot is from a Covered electronics housing, in which the control electronics for the electric motor is integrated.

Zeichnungdrawing

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert. Es zeigen.

Fig. 1
eine perspektivische Ansicht einer Wasserpumpe,
Fig. 2
eine Rückansicht der Wasserpumpe in Richtung Pfeil II in Fig. 1,
Fig. 3
die Wasserpumpe gemäß Fig. 1 mit teilweise abgezogenem Gehäusetopf,
Fig. 4
eine perspektivische Ansicht des Gehäuse-Unterteils des Pumpengehäuses mit Pumpenrad und das Pumpenrad antreibendem Elektromotor der Wasserpumpe in Fig. 1,
Fig. 5
auszugsweise einen Schnitt längs der Linie V - V in Fig. 1 bei noch nicht hergestellter Verrastung zwischen Pumpengehäuse und Gehäusetopf,
Fig. 6
ausschnittweise einen Schnitt des Gehäusetopfs längs der Linie VI - VI in Fig. 1 mit an dem Gehäusetopf verrastetem Pumpengehäuse (nicht geschnitten).
The invention is explained in more detail in the following description with reference to an embodiment shown in the drawing. Show it.
Fig. 1
a perspective view of a water pump,
Fig. 2
a rear view of the water pump in the direction of arrow II in Fig. 1 .
Fig. 3
according to the water pump Fig. 1 with partially withdrawn housing pot,
Fig. 4
a perspective view of the housing lower part of the pump housing with impeller and the impeller driving electric motor of the water pump in Fig. 1 .
Fig. 5
excerpts a section along the line V - V in Fig. 1 with not yet established locking between pump housing and housing pot,
Fig. 6
a section of the housing pot along the line VI - VI in Fig. 1 with pump housing latched to the housing pot (not cut).

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die in Fig. 1 perspektivisch dargestellte Wasserpumpe als Ausführungsbeispiel für eine allgemeine Flüssigkeitspumpe wird vorzugsweise im Kraftfahrzeugbau im Kühlkreislauf der Brennkraftmaschine oder im Heizkreislauf des Heizungssystems eingesetzt. Sie weist ein zweiteiliges Pumpengehäuse 11 auf, das aus einem Gehäuse-Unterteil 12 und einem darauf aufgeschobenen Gehäuse-Oberteil 13 zusammengesetzt ist. Das Gehäuse-Unterteil 12 trägt randseitig einen radial nach außen abstehenden Ringsteg 14, der als Anlage für das ringförmige Stirnende des Gehäuse-Oberteils 13 und einen zwischen dem Ringsteg 14 und dem Stirnende des Gehäuse-Oberteils 13 einliegenden, auf den Mantel des Gehäuse-Unterteils 12 aufgeschobenen Dichtungsring 15 dient. An dem Gehäuse-Oberteil 13 ist ein eine Einlaßöffnung 161 umschließende, axialer Ansaugstutzen 16 und ein eine Auslaßöffnung 171 umschließender, tangential wegstrebender Auslaßstutzen 17 angeformt. In jedem der beiden Gehäuseteile 12, 13 ist eine spiralförmige Rinne 181, 182 eingeformt. Die bei auf das Gehäuse-Unterteil 12 aufgeschobenem Gehäuse-Oberteil 13 deckungsgleich aufeinanderliegenden beiden Rinnen 181, 182 bilden eine in dem Ansaugstutzen 16 mündende Druckspirale 18 (Fig. 5).In the Fig. 1 shown in perspective water pump as an exemplary embodiment of a general liquid pump is preferably used in automotive engineering in the cooling circuit of the internal combustion engine or in the heating circuit of the heating system. It has a two-part pump housing 11, which is composed of a housing lower part 12 and a housing upper part 13 pushed thereon. The housing lower part 12 bears at the edge a radially outwardly projecting annular web 14, which abut as the system for the annular front end of the housing upper part 13 and a between the annular web 14 and the front end of the housing upper part 13, on the jacket of the housing lower part 12 pushed-sealing ring 15 is used. On the upper housing part 13, an inlet opening 161 enclosing, axial intake manifold 16 and an outlet opening 171 enclosing, tangentially wegstrebender outlet 17 is formed. In each of the two housing parts 12, 13, a spiral groove 181, 182 is formed. The on top of the housing lower part 12 slid housing upper part 13 congruent superimposed two grooves 181, 182 form a opening into the intake manifold 16 pressure spiral 18 (FIG. Fig. 5 ).

In Fig. 4 ist nur die in dem Gehäuse-Unterteil 12 ausgebildete Rinne 181 der Druckspirale 18 zu sehen, die von der im Gehäuse-Oberteil 13 gleich ausgebildeten Rinne 182 der Druckspirale 18 überdeckt wird, wobei sich der druckseitige Auslaßstutzen 17 über den die eine Hälfte der Auslaßöffnung 171 bildenden Mündungsrand der unteren Rinne 181 der Druckspirale 18 schiebt. Koaxial mit der Achse des Pumpengehäuses 11 ist ein Pumpenrad 19 angeordnet, das drehfest auf einer in das Pumpengehäuse 11 koaxial hineinragenden Abtriebswelle 20 eines Elektromotors 21 sitzt. Das rotierende Pumpenrad 19 saugt über den Ansaugstutzen 16 axial Wasser an und fördert dies in die Druckspirale 18, aus der das Wasser über den Auslaßstutzen 17 mit Förderdruck ausströmt.In Fig. 4 only the groove 181 of the pressure spiral 18 formed in the lower housing part 12 can be seen, which is covered by the groove 182 of the pressure spiral 18, which is formed identically in the housing upper part 13, whereby the pressure-side outlet nozzle 17 projects over the one half of the outlet opening 171 forming mouth edge of the lower groove 181 of the pressure coil 18 pushes. Coaxially with the axis of the pump housing 11, an impeller 19 is arranged, the non-rotatably mounted on a coaxially projecting into the pump housing 11 output shaft 20 of an electric motor 21 sits. The rotating impeller 19 draws on the intake manifold 16 axially water and promotes this in the pressure coil 18, from which the water flows through the outlet port 17 with delivery pressure.

Der Elektromotor 21 besteht in bekannter Weise aus einem Stator 22 (Fig. 4) und einem hier nicht weiter dargestellten Rotor, der von dem Stator 22 ringförmig umschlossen ist. Der Stator 22 trägt eine Statorwicklung 23, die über Wicklungsanschlüsse 24, 25 (Fig. 2) bestromt werden kann. Der Elektromotor 21 ist in einem Gehäusetopf 26 aufgenommen, der den Ringsteg 14 am Gehäuse-Unterteil 12, den Dichtungsring 15 und teilweise das Gehäuse-Oberteil 13 übergreift und mit dem Gehäuse-Oberteil 13 unter Herstellung einer axialen Spannkraft zwischen Gehäuse-Oberteil 12 und Gehäusetopf 26 verrastet ist. Hierzu ist an der Topföffnung 261 des Gehäusetopfs 26 eine ringförmige Abstützschulter 27 (Fig. 5) für den Ringsteg 14 am Gehäuse-Unterteil 12 und ein über die Abstützschulter 27 axial überstehender Übergreifrand 28 ausgebildet, der sich beim Ansetzen des Gehäusetopfs 26 an das Pumpengehäuse 11 mit seiner Innenfläche 281 über den Ringsteg 14, den Dichtring 15 und einen Randanschnitt des Gehäuse-Oberteils 13 schiebt, bis der Ringsteg 14 an der Abstützschulter 27 anschlägt.The electric motor 21 consists in a known manner of a stator 22 (FIG. Fig. 4 ) and a rotor, not shown here, which is annularly enclosed by the stator 22. The stator 22 carries a stator winding 23, which has winding connections 24, 25 (FIG. Fig. 2 ) can be energized. The electric motor 21 is accommodated in a housing pot 26 which engages over the annular web 14 on the housing lower part 12, the sealing ring 15 and partially the housing upper part 13 and with the housing upper part 13 to produce an axial clamping force between the housing upper part 12 and the housing pot 26 is locked. For this purpose, at the pot opening 261 of the housing pot 26, an annular support shoulder 27 (FIG. Fig. 5 ) formed for the annular web 14 on the housing base 12 and an over the support shoulder 27 axially projecting Übergreifrand 28, which is when attaching the housing pot 26 to the pump housing 11 with its inner surface 281 via the annular web 14, the sealing ring 15 and a peripheral portion of the housing Upper part 13 pushes until the annular web 14 abuts the support shoulder 27.

Der Gehäusetopf 26 weist in seinem Topfboden 262 (Fig. 2) ein in Umfangsrichtung sich erstreckendes Langloch 29 auf, durch das die Wicklungsanschlüsse 24, 25 der Statorwicklung 23 hindurchgeführt sind. Wie hier nicht weiter dargestellt ist, wird auf den Topfboden 261 ein Elektronikgehäuse aufgesetzt, das das Langloch 29 überdeckt und die mit den Wicklungsanschlüsssen 24, 25 zu verbindende Ansteuerelektronik, z.B. für die Drehzahlregelung, für den Elektromotor 21 enthält.The housing pot 26 has in its pot bottom 262 ( Fig. 2 ) extending in the circumferential direction slot 29 through which the winding terminals 24, 25 of the stator winding 23 are passed. As is not shown here, an electronics housing is placed on the bottom of the pot 261, which covers the slot 29 and contains the Ansteuerelektronik to be connected to the Wicklungsanschlüsssen 24, 25, for example, for the speed control for the electric motor 21.

Wie in Fig. 1, 3, 5 und 6 zu sehen ist, ist die Verrastung zwischen Gehäusetopf 26 und Gehäuse-Oberteil 13 nach Art eines Bayonettverschlusses ausgebildet und weist am Gehäuse-Oberteil 13 über den Umfang äquidistant angeordnete Haltestege 30 und am Übergreifungsrand 28 ausgebildete Hinterschnitte 31 auf. Haltestege 30 und Hinterschnitte 31 werden durch Relativverdrehung von Gehäusetopf 26 und Gehäuse-Oberteil 13 des Pumpengehäuses 11 miteinander in Eingriff gebracht, wobei mit zunehmender Relativverdrehung eine axiale Verschiebebewegung der beiden genannten Bauelemente einsetzt, die eine kraftschlüssige Pressung des zwischen Ringsteg 14 und Stirnende des Gehäuse-Oberteils 13 einliegenden Dichtungsrings 15 bewirkt.As in Fig. 1 . 3 . 5 and 6 can be seen, the latching between the housing cup 26 and housing upper part 13 is formed in the manner of a bayonet closure and has on the housing upper part 13 on the circumference of equidistantly arranged holding webs 30 and formed on the overlap edge 28 undercuts 31. Holding webs 30 and undercuts 31 are brought together by relative rotation of the housing pot 26 and housing upper part 13 of the pump housing 11 in engagement, with increasing relative rotation of an axial Displacement movement of the two components used, which causes a frictional compression of the ring web 14 and the front end of the housing upper part 13 inserted sealing ring 15.

Die Verdrehbewegung wird durch einen Anschlag 32 (Fig. 1 und 3) begrenzt, der an einem der Haltestege 30 ausgebildet ist und axial in die Verdrehbahn der Hinterschnitte 31 hineinragt. Die hergestellte Verrastung von Gehäusetopf 26 und Gehäuse-Oberteil 13 des Pumpengehäuses 11 ist durch eine Verdrehsicherung 33 gewährleistet (Fig. 1, 3 und 6). Die Verdrehsicherung 33 weist einen am Gehäuse-Oberteil 13 nach außen abstehenden, axial elastisch verformbaren Steg 34 auf, der zwischen zwei aufeinanderfolgenden Haltestegen 30 so angeordnet ist, daß er beim Aufschieben des Gehäusetopfes 36 auf das Gehäuse-Oberteil 13 durch einen der Hinterschnitte 31 elastisch ausgelenkt wird. Ist dieser Hinterschnitt 31 vor den zugeordneten Haltesteg 30 gedreht, so federt der Steg 34 wieder zurück und legt sich an die in Umfangsrichtung weisende Stirnkante des Hinterschnitts 31, so daß ein Rückdrehen des Gehäusetopfs 26 verhindert wird. Eine Demontage vom Pumpengehäuse 11 und Gehäusetopf 26 kann durch eine gegensinnige, relative Drehbewegung nur dann erfolgen, wenn der elastische Steg 34 mit einem Hilfswerkzeug aus der Verdrehbahn der Hinterschnitte 31 ausgehoben wird.The twisting movement is controlled by a stop 32 (FIG. Fig. 1 and 3 ), which is formed on one of the retaining webs 30 and protrudes axially into the twist path of the undercuts 31. The latching of the housing pot 26 and the housing upper part 13 of the pump housing 11 produced is ensured by an anti-rotation 33 ( Fig. 1 . 3 and 6 ). The anti-rotation device 33 has a housing on the upper part 13 outwardly projecting axially elastically deformable web 34 which is disposed between two successive support webs 30 so that it when sliding the housing pot 36 on the housing upper part 13 by one of the undercuts 31 elastic is deflected. If this undercut 31 is rotated in front of the associated holding web 30, then the web 34 springs back and lies against the circumferentially oriented end edge of the undercut 31, so that a reverse rotation of the housing pot 26 is prevented. A disassembly of the pump housing 11 and housing pot 26 can only take place by an opposite, relative rotational movement when the elastic web 34 is excavated with an auxiliary tool from the Verdrehbahn the undercuts 31.

Die Montage der Wasserpumpe wird wie folgt durchgeführt:The installation of the water pump is carried out as follows:

Auf die in Fig. 4 dargestellte Vormontageeinheit, bestehend aus dem Gehäuse-Unterteil 12, dem Elektromotor 21 mit Stator 22, Rotor und Abtriebswelle 20 wird der als O-Ring ausgebildete Dichtungsring 15 montiert, indem dieser auf den Mantel des Gehäuse-Unterteils 12 bis zur Anlage am Ringsteg 14 des Gehäuse-Unterteils 12 mit leichter Dehnung aufgeschoben wird. Wie die Schnittdarstellung in Fig. 5 zeigt, sind der Stator 22 und das Gehäuse-Unterteil 12 durch eine Nut/Feder-Verbindung 35 gegen Relativverdrehung zueinander gesichert. Diese Nut/Feder-Verbindung 35 dient gleichzeitig als Montagecodierung für die richtige Drehstellungszuordnung von Stator 22 und Gehäuse-Unterteil 12.On the in Fig. 4 illustrated pre-assembly, consisting of the lower housing part 12, the electric motor 21 with stator 22, rotor and output shaft 20 of the trained as an O-ring sealing ring 15 is mounted by this on the jacket of the housing base 12 until it rests against the annular web 14 of the Housing base 12 is pushed with slight elongation. Like the sectional view in Fig. 5 shows, the stator 22 and the housing lower part 12 are secured by a groove / spring connection 35 against relative rotation to each other. These Groove / spring connection 35 serves as a mounting coding for the correct rotational position assignment of stator 22 and lower housing part 12th

Über die Vormontageeinheit mit Dichtungsring 15 wird das Gehäuse-Oberteil 13 geschoben (Fig. 3). Das Gehäuse-Unterteil 12 und das Gehäuse-Oberteil 13 sind durch eine Nut/Feder-Verbindung 36 aneinander undrehbar festgelegt, die gleichzeitig als Montagecodierung für die richtige Positionierung von Gehäuse-Oberteil 13 und Gehäuse-Unterteil 12 beim Aufschieben dient. Von der Nut/Feder-Verbindung 36 ist in Fig. 4 lediglich die axial verlaufende Nut im Gehäuse-Unterteil 12 zu sehen.About the pre-assembly with sealing ring 15, the housing upper part 13 is pushed ( Fig. 3 ). The housing lower part 12 and the housing upper part 13 are non-rotatably fixed to each other by a tongue and groove connection 36, which simultaneously serves as a mounting coding for the correct positioning of the housing upper part 13 and the housing lower part 12 during pushing. From the tongue and groove connection 36 is in Fig. 4 only to see the axially extending groove in the housing base 12.

Nach der Zusammensetzung des Pumpengehäuses 11 wird der Gehäusetopf 26 auf den Stator 22 aufgeschoben (Fig. 3), wobei der Übergreifungsrand 28 an der Topföffnung 261 den Ringsteg 14, den Dichtungsring 15 und das Gehäuse-Oberteil 13 zunehmend übergreift und die Hinterschnitte 31 am Übergreifungsrand 28 sich zwischen die Haltestege 30 auf dem Gehäuse-Oberteil 13 hindurchschieben. Dabei treten die Wicklungsanschlüsse 24, 25 der Statorwicklung 23 durch das Langloch 29 hindurch. Das Aufschieben des Gehäusetopfs 26 ist abgeschlossen, wenn der Gehäusetopf 27 und das Gehäuse-Unterteil 12 an der Abstützschulter 27 aneinanderstoßen. Nunmehr werden durch eine Drehbewegung des Gehäusetopfs 26 die Hinterschnitte 31 vor die Haltestege 30 gedreht, wobei die Drehbewegung durch den Anschlag 32 begrenzt wird. Nach der Drehbewegung des Gehäusetopfes 26 ist der Dichtungsring 15 axial komprimiert und dichtet zuverlässig sowohl das Pumpengehäuse 11 gegen Wasseraustritt als auch den Gehäusetopf 26 gegen Eindringen von Wasser ab. Schlägt ein Hinterschnitt 31 bei der Verdrehbewegung des Gehäusetopfs 26 an dem Anschlag 32 an, so ist die Drehbewegung des Gehäusetopfs 26 blockiert und der von einem Hinterschnitt 31 elastisch ausgelenkte Steg 34 der Verdrehsicherung 33 ist von dem Hinterschnitt 31 wieder freigegeben, so daß der Steg 34 in seine ursprüngliche Lage zurückfedert und durch Hintergreifen des Hinterschnitts 31 in Umfangsrichtung ein Rückdrehen des Gehäusetopfs 26 verhindert (Fig. 1 und 6).After the composition of the pump housing 11, the housing pot 26 is pushed onto the stator 22 ( Fig. 3 ), wherein the overlapping edge 28 on the pot opening 261 increasingly engages over the annular web 14, the sealing ring 15 and the housing upper part 13 and the undercuts 31 at the overlapping edge 28 push through between the holding webs 30 on the housing upper part 13. In this case, the winding terminals 24, 25 of the stator winding 23 pass through the slot 29. The sliding of the housing pot 26 is completed when the housing pot 27 and the housing base 12 abut against the support shoulder 27. Now, by a rotational movement of the housing pot 26, the undercuts 31 are rotated in front of the holding webs 30, wherein the rotational movement is limited by the stop 32. After the rotational movement of the housing pot 26, the sealing ring 15 is axially compressed and reliably seals both the pump housing 11 against water leakage and the housing pot 26 against ingress of water. Strikes an undercut 31 in the twisting movement of the housing pot 26 to the stop 32, the rotational movement of the housing pot 26 is blocked and the elastically deflected by an undercut 31 web 34 of rotation 33 is released from the undercut 31 again, so that the web 34th spring back to its original position and by grasping behind the Undercut 31 in the circumferential direction prevents rotation of the housing pot 26 ( Fig. 1 and 6 ).

Eine Bayonett-Verbindung zeichnet sich dadurch aus, daß die Haltestege 30 und/oder die Hinterschnitte 31 eine in Drehrichtung zunehmende, axiale Tiefe aufweisen, um beim Verdrehen der beiden miteinander zu verbindenden Teile eine axiale Spannkraft und damit eine Anpreßkraft auf den Dichtungsring 15 zu erzeugen. Anstelle mit einer solchen Bayonett-Verbindung kann die Verrastung auch mit solchen Haltestegen und Hinterschnitten ausgeführt werden, die eine konstante axiale Breite oder Dicke aufweisen. In diesem Fall muß die axiale Zuordnung der Haltestege 30 am Gehäuse-Oberteil 13 und der Hinterschnitte 31 am Gehäusetopf 26 so vorgenommen werden, daß bei der Montage vor und während des Verdrehens von Gehäusetopf 26 und Pumpengehäuse 11 eine den Dichtungsring 15 zusammenpressende Druckkraft aufgebracht werden muß, damit sich die Hinterschnitte 31 am Gehäusetopf 26 vor die Haltestege 30 am Gehäuse-Oberteil 13 drehen lassen.A bayonet connection is characterized in that the holding webs 30 and / or the undercuts 31 have an axial depth increasing in the direction of rotation in order to generate an axial clamping force and thus a contact pressure on the sealing ring 15 when the two parts to be joined together are rotated , Instead of having such a bayonet connection, the locking can also be carried out with retaining webs and undercuts having a constant axial width or thickness. In this case, the axial assignment of the holding webs 30 on the housing upper part 13 and the undercuts 31 on the housing pot 26 must be made so that during assembly before and during rotation of the housing pot 26 and pump housing 11, a sealing ring 15 compressive force must be applied so that the undercuts 31 on the housing pot 26 can be rotated in front of the retaining webs 30 on the housing upper part 13.

Claims (11)

  1. Liquid pump, in particular a water pump, having a pump housing (11) accommodating a pump wheel (19), and having a motor housing connected to the pump housing (11) and accommodating an electric motor (21) which drives the pump wheel (19) and has a stator (22) and rotor, the pump housing (11) having a housing lower part (12) with a radially outwardly projecting annular web (14) and having a housing upper part (13) which is pushed onto the housing lower part (12), a seal ring (15) being arranged between the free annular face end of the housing upper part (13) and the annular web (14), and the motor housing being designed as a housing pot (26) which overlaps the annular web (14), the seal ring (15) and partially the housing upper part (13) and which is latched to the housing upper part (13) so as to impart an axial clamping force, a relative rotation between the housing pot (26) and housing upper part (13) bringing these into engagement with one another, characterized in that, with progressive relative rotation, an axial displacement movement takes place which causes the seal ring (15) to be non-positively compressed, and in that the housing upper part (13) and the housing lower part (12) are positioned correctly relative to one another, and are non-rotatably fixed to one another, by means of a positively locking connection (36).
  2. Pump according to Claim 1, characterized in that an annular support shoulder (27) for the annular web (14) on the housing lower part (12) and an overlapping edge (28) which projects beyond the support shoulder (27) are formed on the pot opening (161) of the housing pot (26), which overlapping edge (28) slides with the inner surface (281) thereof over the annular web (14), the seal ring (15) and a section of the housing upper part (13).
  3. Pump according to Claim 1 or 2, characterized in that the stator (22) and the housing lower part (12) are positioned correctly relative to one another and are non-rotatably fixed to one another preferably by means of a positively locking connection (35).
  4. Pump according to one of Claims 1-3, characterized in that the latching arrangement between the housing pot (26) and housing upper part (13) has retaining webs (30), which project from the housing upper part (13) and which are arranged equidistantly over the circumference of the housing upper part (13), and undercuts (31) which are formed on the overlapping edge (28) and which, by means of a relative rotation of the housing pot (26) and housing upper part (13), can be placed in engagement in the manner of a bayonet connection.
  5. Pump according to Claim 4, characterized in that an axially projecting stop (32) is arranged on the housing upper part (13), preferably on the end of a retaining web (30), against which stop (32) one of the undercuts (31) on the overlapping edge (28) abuts at the end of the relative rotation, which is required for the latching action, of housing pot (26) and pump housing (11).
  6. Pump according to Claim 4 or 5, characterized in that an anti-twist facility (33) is provided between the housing pot (26) and the housing upper part (13), which anti-twist facility (33) takes effect after the latching action has been produced.
  7. Pump according to Claim 6, characterized in that the anti-twist facility (33) has at least one axially elastically deformable web (34) which projects from the housing upper part (13) and which is arranged such that, when the housing pot (26) is pushed onto the housing upper part (13), said web (34) can be deflected by an undercut (31) pushing through between the retaining webs (30), and after the rotation of the undercut (31), said web (34) springs back in front of the associated retaining web (30) and bears against that end surface which points in the circumferential direction of the undercut (30).
  8. Pump according to one of Claims 1-7, characterized in that the stator (22) has coil terminals (24, 25) for the electrical contacting of a stator coil (23), and the housing pot (26) has, in the pot base (262), a slot (29) which extends in the circumferential direction and through which the coil terminals (24, 25) protrude out of the housing pot (26).
  9. Pump according to Claim 8, characterized in that the slot (29) has a length, measured in the circumferential direction, which is greater than the rotational travel of the housing pot (26) relative to the pump housing (11) connected to the stator (22) for conjoint rotation therewith.
  10. Pump according to one of Claims 1 - 9, characterized in that the pump housing (11) has, at the suction side, an inlet opening (161) coaxial to the pump wheel (19), and at the pressure side, an outlet opening (171) tangential to the pump wheel (19), in which outlet opening (171) a pressure spiral (18) which surrounds the pump wheel (19) opens out, and in that the pressure spiral (18) is formed by two channels (181, 182) which are situated one on top of the other and of which in each case one is formed in the housing lower part (12) and in the housing upper part (13) of the pump housing (11).
  11. Pump according to Claim 10, characterized in that the inlet and outlet openings (161, 171) are surrounded in each case by one of two connecting pieces (16, 17) integrally formed on the housing upper part (13).
EP02781135A 2002-02-05 2002-10-14 Liquid pump Expired - Lifetime EP1474611B1 (en)

Applications Claiming Priority (3)

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DE10204459A DE10204459A1 (en) 2002-02-05 2002-02-05 liquid pump
DE10204459 2002-02-05
PCT/DE2002/003878 WO2003067094A1 (en) 2002-02-05 2002-10-14 Liquid pump

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EP1474611A1 EP1474611A1 (en) 2004-11-10
EP1474611B1 true EP1474611B1 (en) 2011-06-08

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JP (1) JP4317028B2 (en)
KR (1) KR20040077930A (en)
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WO (1) WO2003067094A1 (en)

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DE10204459A1 (en) 2003-08-07
JP2005517126A (en) 2005-06-09
US20040071573A1 (en) 2004-04-15
US7137794B2 (en) 2006-11-21
WO2003067094A1 (en) 2003-08-14
EP1474611A1 (en) 2004-11-10
JP4317028B2 (en) 2009-08-19
KR20040077930A (en) 2004-09-07

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