EP1532362B1 - Connection piece for a fuel pump - Google Patents

Connection piece for a fuel pump Download PDF

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Publication number
EP1532362B1
EP1532362B1 EP04739063A EP04739063A EP1532362B1 EP 1532362 B1 EP1532362 B1 EP 1532362B1 EP 04739063 A EP04739063 A EP 04739063A EP 04739063 A EP04739063 A EP 04739063A EP 1532362 B1 EP1532362 B1 EP 1532362B1
Authority
EP
European Patent Office
Prior art keywords
plug
connector
connection piece
sealing lip
fuel 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 - Fee Related
Application number
EP04739063A
Other languages
German (de)
French (fr)
Other versions
EP1532362A1 (en
Inventor
Thomas Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
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Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP1532362A1 publication Critical patent/EP1532362A1/en
Application granted granted Critical
Publication of EP1532362B1 publication Critical patent/EP1532362B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M2037/082—Details of the entry of the current supply lines into the pump housing, e.g. wire connectors, grommets, plugs or sockets

Definitions

  • the invention relates to a connector for a fuel pump with a receptacle in which a plug is arranged with electrical contacts for connecting an electric motor of a fuel pump to a power grid, wherein the plug is molded with plastic.
  • Such fittings are used in fuel pumps of today's motor vehicles to complete a common housing of the electric motor and a pump stage and are known in practice (see, eg Application GB-A-2,292,267 ).
  • the electrical contacts are inserted through the openings provided in the connector.
  • a arranged in the region of the electrical contacts sealing ring prevents the escape of fuel. This makes it possible that the delivery pressure generated by the fuel pump can be held by the connector and fed to a connection piece of a supply line.
  • a disadvantage of the known connection piece the cost of the sealing ring and its installation.
  • damage to the plastic connector may occur during assembly of the connector by the electrical contacts.
  • the invention is based on the problem of designing a connector of the type mentioned above so that it is particularly easy to manufacture and assemble.
  • the plug is a one-piece molded, circumferential sealing lip be-sitting.
  • the sealing lip is manufactured with the plastic extrusion of the connector in one step.
  • connection piece according to the invention does not require a sealing ring for sealing off the plug and thus particularly few components to be mounted. An encapsulation of the plug to its seal against adjacent components of the connector according to the invention is not required.
  • the connector according to the invention can therefore be manufactured particularly easily.
  • a good seal of the plug in the connection piece is achieved if the sealing lip is arranged in the region of the passage of the electrical contacts on the plug.
  • the sealing lip has a pointing in the direction of the electrical contacts area.
  • Such an orientation of the sealing lip has the advantage that the sealing lip is deformed during assembly of the plug in the connector. An elastic deformation of the sealing lip also causes the sealing lip is in the assembled state under bias, thereby increasing the sealing effect.
  • the plug with a Transition or interference fit is arranged in a recess of the receptacle.
  • the pre-assembly of the plug in the receptacle is particularly simple according to another advantageous embodiment of the invention, when the receptacle and the plug have mutually corresponding locking means.
  • the locking means thus serve as an assembly aid for the plug.
  • the connector known from practice has an inserted bearing bush made of metal for supporting a shaft of the electric motor of the fuel pump.
  • a bearing bush made of metal for supporting a shaft of the electric motor of the fuel pump.
  • cup-shaped recess is arranged. As a result, it is no longer necessary to insert and fasten a separately manufactured bearing bush in the connecting piece according to the invention.
  • An integration of a plurality of components in the connector according to the invention can be achieved easily, if in addition to the recording two guides for connected to the plug brushes of the electric motor are arranged.
  • the connecting piece according to the invention can be produced in a particularly cost-effective manner from injection-molded plastic and can be easily demolded from the injection mold when the receptacle, the guides and the cup-shaped recess are arranged parallel to one another.
  • Corrosion of connections of electrical lines can be reliably avoided according to another advantageous embodiment of the invention, when the plug has a plastic extrusion and when the plastic encapsulation encloses connections of the electrical contacts with leading to the brush lines.
  • An electrostatic charge of the connector according to the invention can be avoided with a particularly low structural complexity when a projecting from the plug grounding conductor is led to a lower, provided for connection to a housing of the electric motor edge of the connector.
  • FIG. 1 shows a fuel pump with a driven by an electric motor 1 pumping stage 2 of a motor vehicle and with a mounted on a housing 3 connector 4.
  • the connector 4 has a connecting piece 5 for leading to an internal combustion engine of the motor vehicle flow line. Furthermore, the connector 4 has electrical contacts 6 for the electric motor 1 of the fuel pump.
  • FIG. 2 shows the connector 4 FIG. 1 in an enlarged partial section.
  • the electrical contacts 6 are arranged on a plug 7.
  • the plug 7 is molded with a plastic jacket 8, from the choke coils 9 and two brushes 10 for a collector of the electric motor 1 from FIG. 1 protrude.
  • the brushes 10 are guided in elongated guides of the connecting piece 4 and by means of a spring element in the direction of in FIG. 1 biased shown electric motor 1.
  • the plug 7 is held by latching means 11 in a receptacle 12 of the connector 4 and penetrates with an edge 13 of a recess 14 of the connector 4.
  • the connector 4 has in its center a cup-shaped recess for direct storage of a shaft of the electric motor 1.
  • a grounding conductor 16 is guided from the plug 7 to the lower edge of the fitting 4.
  • FIG. 3 shows greatly enlarged the area of the edge 13 of the plug 7 and the recess 14 of the connector 4. It can be seen that the plastic jacket 8 of the plug 7 is directly above its edge 13 with the recess 14 of the connector 4 in contact. On the plastic jacket 8 of the plug 7, a circumferential sealing lip 17 is integrally formed in the region of the electrical contacts 6. The sealing lip 17 has a region 18 which points in the direction of the electrical contacts 6, so that the sealing lip 17 is in the mounted state with the connection piece 4 in connection.
  • an overpressure which acts on the plug 7 and thus on the sealing lip 17 and thus biases the sealing lip 17 against the connector 4.
  • the edge 13 of the plug 7 and the connector 4 are made of a plastic swellable with plastic and have a transition fit or interference fit.
  • the plug 7 is inserted for mounting in the receptacle 12 of the connector 4 until the locking means 11 hold the plug 7 in position.
  • the edge 13 and the recess 14 swell and thus additionally seal the plug 7 against the connection piece 4.

Description

Die Erfindung betrifft ein Anschlussstück für eine Kraftstoffpumpe mit einer Aufnahme, in der ein Stecker mit elektrischen Kontakten zur Verbindung eines Elektromotors einer Kraftstoffpumpe mit einem Stromnetz angeordnet ist, wobei der Stecker mit Kunststoff umspritzt ist.The invention relates to a connector for a fuel pump with a receptacle in which a plug is arranged with electrical contacts for connecting an electric motor of a fuel pump to a power grid, wherein the plug is molded with plastic.

Solche Anschlussstücke werden bei Kraftstoffpumpen heutiger Kraftfahrzeuge zum Abschluss eines gemeinsamen Gehäuses des Elektromotors und einer Pumpenstufe eingesetzt und sind aus der Praxis bekannt (siehe z.B. die Anmeldung GB-A-2.292.267 ). Zur Montage werden die elektrischen Kontakte durch die im Anschlussstück vorgesehenen Öffnungen eingesetzt. Ein im Bereich der elektrischen Kontakte angeordneter Dichtring verhindert den Austritt von Kraftstoff. Damit wird ermöglicht, dass der von der Kraftstoffpumpe erzeugte Förderdruck von dem Anschlussstück gehalten und einem Anschlussstutzen einer Vorlaufleitung zugeführt werden kann. Nachteilig bei dem bekannten Anschlussstück sind die Kosten für den Dichtring und dessen Montage. Zudem kann es bei der Montage des Anschlussstücks durch die elektrischen Kontakte zu Beschädigungen des aus Kunststoff bestehenden Anschlussstückes kommen.Such fittings are used in fuel pumps of today's motor vehicles to complete a common housing of the electric motor and a pump stage and are known in practice (see, eg Application GB-A-2,292,267 ). For mounting the electrical contacts are inserted through the openings provided in the connector. A arranged in the region of the electrical contacts sealing ring prevents the escape of fuel. This makes it possible that the delivery pressure generated by the fuel pump can be held by the connector and fed to a connection piece of a supply line. A disadvantage of the known connection piece, the cost of the sealing ring and its installation. In addition, damage to the plastic connector may occur during assembly of the connector by the electrical contacts.

Weiterhin ist aus der Praxis ein Anschlussstück bekannt geworden, bei dem der Stecker von dem Kunststoff des Anschlussstücks umspritzt ist. Dies erfordert ebenfalls eine sehr aufwändige Fertigung des Anschlussstücks.Furthermore, from practice a connector has become known, in which the plug is encapsulated by the plastic of the connector. This also requires a very complex production of the connector.

Der Erfindung liegt das Problem zugrunde, ein Anschlussstück der eingangs genannten Art so zu gestalten, dass es besonders einfach zu fertigen und zu montieren ist.The invention is based on the problem of designing a connector of the type mentioned above so that it is particularly easy to manufacture and assemble.

Dieses Problem wird erfindungsgemäß dadurch gelöst, dass der Stecker eine einteilig angeformte, umlaufende Dichtlippe be-sitzt. Die Dichtlippe wird mit der Kunststoffumspritzung des Steckers in einem Arbeitsschritt gefertigt.This problem is inventively achieved in that the plug is a one-piece molded, circumferential sealing lip be-sitting. The sealing lip is manufactured with the plastic extrusion of the connector in one step.

Durch diese Gestaltung erfordert das erfindungsgemäße Anschlussstück keinen Dichtring zur Abdichtung des Steckers und damit besonders wenige zu montierende Bauteile. Eine Umspritzung des Steckers zu seiner Abdichtung gegenüber angrenzenden Bauteilen des erfindungsgemäßen Anschlussstücks ist nicht erforderlich. Das erfindungsgemäße Anschlussstück lässt sich daher besonders einfach fertigen.As a result of this design, the connection piece according to the invention does not require a sealing ring for sealing off the plug and thus particularly few components to be mounted. An encapsulation of the plug to its seal against adjacent components of the connector according to the invention is not required. The connector according to the invention can therefore be manufactured particularly easily.

Eine gute Abdichtung des Steckers im Anschlussstück wird erreicht, wenn die Dichtlippe im Bereich der Durchführung der elektrischen Kontakte am Stecker angeordnet ist.A good seal of the plug in the connection piece is achieved if the sealing lip is arranged in the region of the passage of the electrical contacts on the plug.

Zur Erhöhung der Dichtwirkung besitzt die Dichtlippe einen in Richtung der elektrischen Kontakte weisenden Bereich. Eine derartige Ausrichtung der Dichtlippe besitzt den Vorteil, dass die Dichtlippe bei der Montage des Steckers im Anschlussstück verformt wird. Eine elastische Verformung der Dichtlippe bewirkt zudem, dass die Dichtlippe im montierten Zustand unter Vorspannung steht, wodurch die Dichtwirkung erhöht.To increase the sealing effect, the sealing lip has a pointing in the direction of the electrical contacts area. Such an orientation of the sealing lip has the advantage that the sealing lip is deformed during assembly of the plug in the connector. An elastic deformation of the sealing lip also causes the sealing lip is in the assembled state under bias, thereby increasing the sealing effect.

Da im erfindungsgemäßen Anschlussstück im montierten Zustand an der Kraftstoffpumpe der Druck des Kraftstoffs ausschließlich von einer Seite auf den Stecker einwirkt, besteht ein weiterer Vorteil der Ausrichtung der Dichtlippe in Richtung der elektrischen Kontakte darin, dass der Innendruck in der Kraftstoffpumpe für die Abdichtung des Steckers genutzt wird. Diese presst die Dichtlippe aufgrund ihrer Gestaltung gegen das Anschlussstück, wobei die Anpresskraft der Dichtlippe gegen das Anschlussstück mit steigendem Druck innerhalb der Kraftstoffpumpe zunimmt.Since, in the assembled state of the fuel pump according to the invention, the pressure of the fuel acts exclusively on one side of the plug, another advantage of the alignment of the sealing lip in the direction of the electrical contacts is that the internal pressure in the fuel pump is used to seal the plug becomes. Due to its design, this presses the sealing lip against the connection piece, the contact pressure of the sealing lip against the connection piece increasing with increasing pressure within the fuel pump.

Zur weiteren Vereinfachung der Fertigung des erfindungsgemäßen Anschlussstücks trägt es bei, wenn der Stecker mit einer Übergangs- oder Presspassung in einer Ausnehmung der Aufnahme angeordnet ist.To further simplify the manufacture of the connector according to the invention, it helps if the plug with a Transition or interference fit is arranged in a recess of the receptacle.

Die Vormontage des Steckers in der Aufnahme gestaltet sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung besonders einfach, wenn die Aufnahme und der Stecker miteinander korrespondierende Rastmittel aufweisen. Die Rastmittel dienen damit als Montagehilfe für den Stecker.The pre-assembly of the plug in the receptacle is particularly simple according to another advantageous embodiment of the invention, when the receptacle and the plug have mutually corresponding locking means. The locking means thus serve as an assembly aid for the plug.

Das aus der Praxis bekannte Anschlussstück weist eine eingesetzte Lagerbuchse aus Metall zur Lagerung einer Welle des Elektromotors der Kraftstoffpumpe auf. Zur weiteren Vereinfachung der Montage des erfindungsgemäßen Anschlussstücks trägt es jedoch bei, wenn neben der Aufnahme eine als Lagerauge zur unmittelbaren Lagerung der Welle des Elektromotors ausgebildete, topfförmige Ausnehmung angeordnet ist. Hierdurch ist es nicht mehr erforderlich, in das erfindungsgemäße Anschlussstück eine separat gefertigte Lagerbuchse einzusetzen und zu befestigen.The connector known from practice has an inserted bearing bush made of metal for supporting a shaft of the electric motor of the fuel pump. To further simplify the assembly of the connector according to the invention, however, it contributes, if next to the receptacle designed as a bearing eye for direct storage of the shaft of the electric motor, cup-shaped recess is arranged. As a result, it is no longer necessary to insert and fasten a separately manufactured bearing bush in the connecting piece according to the invention.

Eine Integration einer Vielzahl von Bauteilen in dem erfindungsgemäßen Anschlussstück lässt sich einfach erreichen, wenn neben der Aufnahme zwei Führungen für mit dem Stecker verbundene Bürsten des Elektromotors angeordnet sind.An integration of a plurality of components in the connector according to the invention can be achieved easily, if in addition to the recording two guides for connected to the plug brushes of the electric motor are arranged.

Das erfindungsgemäße Anschlussstück lässt sich besonders kostengünstig aus Kunststoff im Spritzgussverfahren fertigen und aus der Spritzgussform einfach axial entformen, wenn die Aufnahme, die Führungen und die topfförmige Ausnehmung parallel zueinander angeordnet sind.The connecting piece according to the invention can be produced in a particularly cost-effective manner from injection-molded plastic and can be easily demolded from the injection mold when the receptacle, the guides and the cup-shaped recess are arranged parallel to one another.

Eine Korrosion von Verbindungen von elektrischen Leitungen lässt sich gemäß einer anderen vorteilhaften Weiterbildung der Erfindung zuverlässig vermeiden, wenn der Stecker eine Kunststoffumspritzung hat und wenn die Kunststoffumspritzung Verbindungen der elektrischen Kontakte mit zu den Bürsten führenden Leitungen umschließt.Corrosion of connections of electrical lines can be reliably avoided according to another advantageous embodiment of the invention, when the plug has a plastic extrusion and when the plastic encapsulation encloses connections of the electrical contacts with leading to the brush lines.

Eine elektrostatische Aufladung des erfindungsgemäßen Anschlussstücks lässt sich mit besonders geringem baulichen Aufwand vermeiden, wenn ein von dem Stecker abstehender Erdungsleiter bis zu einem unteren, zur Verbindung mit einem Gehäuse des Elektromotors vorgesehenen Rand des Anschlussstücks geführt ist.An electrostatic charge of the connector according to the invention can be avoided with a particularly low structural complexity when a projecting from the plug grounding conductor is led to a lower, provided for connection to a housing of the electric motor edge of the connector.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine davon in den Zeichnungen dargestellt und wird nachfolgend beschrieben. Diese zeigt in:

Figur 1:
schematisch eine Kraftstoffpumpe mit einem erfindungsgemäßen Anschlussstück,
Figur 2:
das erfindungsgemäße Anschlussstück aus Fig. 1 im Teilschnitt,
Figur 3:
eine stark vergrößerte Darstellung einer Einzelheit III des erfindungsgemäßen Anschlussstücks aus Figur 2.
The invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawings and will be described below. This shows in:
FIG. 1:
schematically a fuel pump with a connector according to the invention,
FIG. 2:
the connector of the invention Fig. 1 in partial section,
FIG. 3:
a greatly enlarged view of a detail III of the connector of the invention FIG. 2 ,

Figur 1 zeigt eine Kraftstoffpumpe mit einer von einem Elektromotor 1 angetriebenen Pumpstufe 2 eines Kraftfahrzeuges und mit einem auf einem Gehäuse 3 befestigten Anschlussstück 4. Das Anschlussstück 4 hat einen Anschlussstutzen 5 für eine zu einer Brennkraftmaschine des Kraftfahrzeuges führenden Vorlaufleitung. Weiterhin weist das Anschlussstück 4 elektrische Kontakte 6 für den Elektromotor 1 der Kraftstoffpumpe auf. FIG. 1 shows a fuel pump with a driven by an electric motor 1 pumping stage 2 of a motor vehicle and with a mounted on a housing 3 connector 4. The connector 4 has a connecting piece 5 for leading to an internal combustion engine of the motor vehicle flow line. Furthermore, the connector 4 has electrical contacts 6 for the electric motor 1 of the fuel pump.

Figur 2 zeigt das Anschlussstück 4 aus Figur 1 in einem vergrößerten Teilschnitt. Die elektrischen Kontakte 6 sind auf einem Stecker 7 angeordnet. Der Stecker 7 ist mit einem Kunststoffmantel 8 umspritzt, aus dem Drosselspulen 9 und zwei Bürsten 10 für einen Kollektor des Elektromotors 1 aus Figur 1 herausragen. Die Bürsten 10 sind in länglichen Führungen des Anschlussstücks 4 geführt und mittels eines Federelementes in Richtung des in Figur 1 dargestellten Elektromotors 1 vorgespannt. Der Stecker 7 ist von Rastmitteln 11 in eine Aufnahme 12 des Anschlussstücks 4 gehalten und durchdringt mit einem Rand 13 einer Ausnehmung 14 des Anschlussstücks 4. Weiterhin hat das Anschlussstück 4 in seinem Zentrum eine topfförmige Ausnehmung zur unmittelbaren Lagerung einer Welle des Elektromotors 1. Ein Erdungsleiter 16 ist von dem Stecker 7 bis zu dem unteren Rand des Anschlussstücks 4 geführt. FIG. 2 shows the connector 4 FIG. 1 in an enlarged partial section. The electrical contacts 6 are arranged on a plug 7. The plug 7 is molded with a plastic jacket 8, from the choke coils 9 and two brushes 10 for a collector of the electric motor 1 from FIG. 1 protrude. The brushes 10 are guided in elongated guides of the connecting piece 4 and by means of a spring element in the direction of in FIG. 1 biased shown electric motor 1. The plug 7 is held by latching means 11 in a receptacle 12 of the connector 4 and penetrates with an edge 13 of a recess 14 of the connector 4. Furthermore, the connector 4 has in its center a cup-shaped recess for direct storage of a shaft of the electric motor 1. A grounding conductor 16 is guided from the plug 7 to the lower edge of the fitting 4.

Figur 3 zeigt stark vergrößert den Bereich des Randes 13 des Steckers 7 und die Ausnehmung 14 des Anschlussstücks 4. Hierbei ist zu erkennen, dass der Kunststoffmantel 8 des Steckers 7 über seinen Rand 13 unmittelbar mit der Ausnehmung 14 des Anschlussstücks 4 in Kontakt steht. Am Kunststoffmantel 8 des Steckers 7 ist im Bereich der elektrischen Kontakte 6 eine umlaufende Dichtlippe 17 einteilig angeformt. Die Dichtlippe 17 besitzt einen Bereich 18, der in Richtung der elektrischen Kontakte 6 weist, so dass die Dichtlippe 17 im montierten Zustand mit dem Anschlussstück 4 in Verbindung steht. Bei einer Förderung von Kraftstoff durch die in Figur 1 dargestellte Kraftstoffpumpe entsteht innerhalb des Gehäuses 3 ein Überdruck, der auf den Stecker 7 und damit auf die Dichtlippe 17 einwirkt und so die Dichtlippe 17 gegen das Anschlussstück 4 vorspannt. FIG. 3 shows greatly enlarged the area of the edge 13 of the plug 7 and the recess 14 of the connector 4. It can be seen that the plastic jacket 8 of the plug 7 is directly above its edge 13 with the recess 14 of the connector 4 in contact. On the plastic jacket 8 of the plug 7, a circumferential sealing lip 17 is integrally formed in the region of the electrical contacts 6. The sealing lip 17 has a region 18 which points in the direction of the electrical contacts 6, so that the sealing lip 17 is in the mounted state with the connection piece 4 in connection. In a promotion of fuel by the in FIG. 1 illustrated fuel pump is formed within the housing 3, an overpressure, which acts on the plug 7 and thus on the sealing lip 17 and thus biases the sealing lip 17 against the connector 4.

Der Rand 13 des Steckers 7 und das Anschlussstück 4 sind aus einem mit kraftstoffquellfähigen Kunststoff gefertigt und weisen eine Übergangspassung oder Presspassung auf. Damit wird der Stecker 7 zur Montage in die Aufnahme 12 des Anschlussstücks 4 eingeführt, bis die Rastmittel 11 den Stecker 7 in seiner Lage halten. Bei einem Kontakt mit Kraftstoff quellen der Rand 13 und die Ausnehmung 14 und dichten damit zusätzlich den Stecker 7 gegen das Anschlussstück 4 ab.The edge 13 of the plug 7 and the connector 4 are made of a plastic swellable with plastic and have a transition fit or interference fit. Thus, the plug 7 is inserted for mounting in the receptacle 12 of the connector 4 until the locking means 11 hold the plug 7 in position. Upon contact with fuel, the edge 13 and the recess 14 swell and thus additionally seal the plug 7 against the connection piece 4.

Claims (4)

  1. Connection piece for a fuel pump having a receiving device in which a plug is arranged which has electrical contacts for connecting an electric motor of the fuel pump to a mains supply, the plug being extrusion-coated with plastic, characterized in that the plug (7) has an integrally formed, circumferential sealing lip (17).
  2. Connection piece according to claim 1, characterized in that the sealing lip (17) is arranged on the plug (7) in the region of the bushing (14) of the electrical contacts (6).
  3. Connection piece according to claim 1 or 2, characterized in that the sealing lip (17) has a region (18) which points in the direction of the electrical contacts (6).
  4. Connection piece according to at least one of the preceding claims, characterized in that the sealing lip (17) can be elastically deformed.
EP04739063A 2003-03-27 2004-03-11 Connection piece for a fuel pump Expired - Fee Related EP1532362B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10313985A DE10313985A1 (en) 2003-03-27 2003-03-27 Connector for a fuel pump
DE10313985 2003-03-27
PCT/EP2004/002531 WO2004085823A1 (en) 2003-03-27 2004-03-11 Connection piece for a fuel pump

Publications (2)

Publication Number Publication Date
EP1532362A1 EP1532362A1 (en) 2005-05-25
EP1532362B1 true EP1532362B1 (en) 2008-05-14

Family

ID=32946269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04739063A Expired - Fee Related EP1532362B1 (en) 2003-03-27 2004-03-11 Connection piece for a fuel pump

Country Status (7)

Country Link
US (1) US20050287023A1 (en)
EP (1) EP1532362B1 (en)
KR (1) KR100712326B1 (en)
CN (1) CN100374710C (en)
DE (2) DE10313985A1 (en)
ES (1) ES2305782T3 (en)
WO (1) WO2004085823A1 (en)

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CN108131226B (en) * 2018-01-31 2019-05-10 重庆安布伦斯科技有限公司 A kind of plug for automobile fuel pump

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Also Published As

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CN100374710C (en) 2008-03-12
DE502004007115D1 (en) 2008-06-26
US20050287023A1 (en) 2005-12-29
ES2305782T3 (en) 2008-11-01
KR20050071630A (en) 2005-07-07
KR100712326B1 (en) 2007-04-30
DE10313985A1 (en) 2004-10-07
CN1701175A (en) 2005-11-23
EP1532362A1 (en) 2005-05-25
WO2004085823A1 (en) 2004-10-07

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