EP1532362A1 - Connection piece for a fuel pump - Google Patents

Connection piece for a fuel pump

Info

Publication number
EP1532362A1
EP1532362A1 EP04739063A EP04739063A EP1532362A1 EP 1532362 A1 EP1532362 A1 EP 1532362A1 EP 04739063 A EP04739063 A EP 04739063A EP 04739063 A EP04739063 A EP 04739063A EP 1532362 A1 EP1532362 A1 EP 1532362A1
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.)
Granted
Application number
EP04739063A
Other languages
German (de)
French (fr)
Other versions
EP1532362B1 (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
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
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

Links

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 with electrical contacts for connecting an electric motor of a fuel pump to a power supply is arranged, the plug being extrusion-coated with plastic.
  • Such connectors are used in fuel pumps of today's motor vehicles to terminate a common housing of the electric motor and a pump stage and are known from practice.
  • the electrical contacts are inserted through the openings provided in the connector for installation.
  • a sealing ring arranged in the area of the electrical contacts prevents fuel from escaping. This makes it possible for the delivery pressure generated by the fuel to be held by the connection piece and to be fed to a connection piece of a flow line.
  • a disadvantage of the known connector is the cost of the sealing ring and its assembly.
  • the electrical contacts may damage the plastic connector when the connector is installed.
  • the invention is based on the problem of designing a connector of the type mentioned at the outset in such a way that it is particularly simple to manufacture and assemble.
  • the plug has a one-piece, circumferential sealing lip sitting.
  • the sealing lip is manufactured in one step with the plastic encapsulation of the connector.
  • connection piece according to the invention does not require a sealing ring for sealing the plug and therefore particularly few components to be assembled. It is not necessary to overmold the plug to seal it against adjacent components of the connecting piece according to the invention.
  • the connector according to the invention is therefore particularly easy to manufacture.
  • a good seal of the plug in the connection piece is achieved if the sealing lip is arranged in the area of the passage of the electrical contacts on the plug.
  • the sealing lip has an area pointing in the direction of the electrical contacts.
  • Such an alignment of the sealing lip has the advantage that the sealing lip is deformed when the plug is installed in the connector.
  • An elastic deformation of the sealing lip also causes the sealing lip to be under tension in the assembled state, which increases the sealing effect.
  • the preassembly of the plug in the receptacle is particularly simple if the receptacle and the plug have corresponding locking means.
  • the locking means thus serve as an assembly aid for the connector.
  • the connector known from practice has an inserted metal bearing bush for mounting a shaft of the electric motor of the fuel pump.
  • a cup-shaped recess designed as a bearing eye for direct mounting of the shaft of the electric motor 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 large number of components in the connector according to the invention can be achieved easily if two guides for brushes of the electric motor connected to the plug are arranged next to the receptacle.
  • the connecting piece according to the invention can be manufactured particularly inexpensively from plastic in the injection molding process and simply axially removed from the injection mold if the receptacle, the guides and the cup-shaped recess are arranged parallel to one another.
  • connection piece according to the invention can be avoided with particularly little construction effort if an earth conductor protruding from the plug is led to a lower edge of the connection piece provided for connection to a housing of the electric motor.
  • FIG. 1 schematically a fuel pump with a connection piece according to the invention
  • FIG. 2 the connector according to the invention
  • FIG. 3 a greatly enlarged illustration of a detail III of the connecting piece according to the invention from FIG. 2.
  • FIG. 1 shows a fuel pump with a pump stage 2 of a motor vehicle driven by an electric motor 1 and with a connecting piece 4 fastened on a housing 3.
  • connection piece 4 has a connection piece 5 for a flow line leading to an internal combustion engine of the motor vehicle. Furthermore, the connector 4 has electrical contacts 6 for the electric motor 1 of the fuel pump.
  • FIG. 2 shows the connector 4 of Figure 1 in an enlarged partial section.
  • the electrical contacts 6 are arranged on a plug 7.
  • the plug 7 is extrusion-coated with a plastic jacket 8, from which 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 connector 4 and by means of a spring element biased in the direction of the electric motor 1 shown in Figure 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 a pot-shaped recess in its center for direct mounting of a shaft of the electric motor 1.
  • An earth conductor 16 is guided from the plug 7 to the lower edge of the connector 4.
  • FIG. 3 shows the area of the edge 13 of the plug 7 and the recess 14 of the connector 4 in a greatly enlarged manner. It can be seen here that the plastic jacket 8 of the connector 7 is in direct contact with the recess 14 of the connector 4 via its edge 13. A circumferential sealing lip 17 is integrally formed on the plastic jacket 8 of the plug 7 in the area 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 connected to the connecting piece 4 in the assembled state.
  • an overpressure arises within the housing 3, which acts on the plug 7 and thus on the sealing lip 17 and thus prestresses the sealing lip 17 against the connector 4.
  • the edge 13 of the plug 7 and the connecting piece 4 are made of a plastic which is capable of swelling in fuel and have a transition fit or press fit.
  • the plug 7 is thus inserted into the receptacle 12 of the connector 4 for assembly until the latching means 11 hold the plug 7 in position.
  • the edge 13 and the recess 14 swell and thus additionally seal the connector 7 against the connector 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Disclosed is a fuel pump in which a plug (7) used for mounting electrical contacts (6) is extrusion-coated with a plastic coat and is inserted into a receiving device (12) of a connection piece (4). The plug (7) comprises a circumferential sealing lip (17) which is molded on as a single piece and seals the plug (7) from the connection piece (4). The connection piece (4) thus requires a particularly low number of parts and can be produced in an inexpensive manner.

Description

Beschreibungdescription
Anschlussstück für eine KraftstoffpumpeConnector for a fuel pump
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 with electrical contacts for connecting an electric motor of a fuel pump to a power supply is arranged, the plug being extrusion-coated 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 . 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 Kraftstoff umpe 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 Anschluss- stückes kommen.Such connectors are used in fuel pumps of today's motor vehicles to terminate a common housing of the electric motor and a pump stage and are known from practice. The electrical contacts are inserted through the openings provided in the connector for installation. A sealing ring arranged in the area of the electrical contacts prevents fuel from escaping. This makes it possible for the delivery pressure generated by the fuel to be held by the connection piece and to be fed to a connection piece of a flow line. A disadvantage of the known connector is the cost of the sealing ring and its assembly. In addition, the electrical contacts may damage the plastic connector when the connector is installed.
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, a connector has become known in practice, in which the plug is encapsulated by the plastic of the connector. This also requires a very complex manufacture 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 at the outset in such a way that it is particularly simple 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.According to the invention, this problem is solved in that the plug has a one-piece, circumferential sealing lip sitting. The sealing lip is manufactured in one step with the plastic encapsulation of the connector.
Durch diese Gestaltung erfordert das erfindungsgemäße An- schlussstück keinen Dichtring zur Abdichtung des Steckers und damit besonders wenige zu montierende Bauteile. Eine Umsprit- zung des Steckers zu seiner Abdichtung gegenüber angrenzenden Bauteilen des erfindungsgemäßen Anschlussstücks ist nicht erforderlich. Das erfindungsgemäße Anschlussstück lässt sich daher besonders einfach fertigen.Due to this design, the connection piece according to the invention does not require a sealing ring for sealing the plug and therefore particularly few components to be assembled. It is not necessary to overmold the plug to seal it against adjacent components of the connecting piece according to the invention. The connector according to the invention is therefore particularly easy to manufacture.
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 area 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 An- schlussstück 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 an area pointing in the direction of the electrical contacts. Such an alignment of the sealing lip has the advantage that the sealing lip is deformed when the plug is installed in the connector. An elastic deformation of the sealing lip also causes the sealing lip to be under tension in the assembled state, which increases 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 connector according to the invention the pressure of the fuel acts on the connector from one side only on the fuel pump, a further 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 connector becomes. Due to its design, this presses the sealing lip against the connecting piece, the contact pressure of the sealing lip against the connecting 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 connector with a Transitional or press 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.According to another advantageous development of the invention, the preassembly of the plug in the receptacle is particularly simple if the receptacle and the plug have corresponding locking means. The locking means thus serve as an assembly aid for the connector.
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 metal bearing bush for mounting a shaft of the electric motor of the fuel pump. To further simplify the assembly of the connecting piece according to the invention, however, it is helpful if, in addition to the receptacle, a cup-shaped recess designed as a bearing eye for direct mounting of the shaft of the electric motor 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 large number of components in the connector according to the invention can be achieved easily if two guides for brushes of the electric motor connected to the plug are arranged next to the receptacle.
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 manufactured particularly inexpensively from plastic in the injection molding process and simply axially removed from the injection mold if 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. 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 Anschluss- stücks geführt ist.According to another advantageous development of the invention, corrosion of connections of electrical lines can be reliably avoided if the plug has a plastic coating and if the plastic coating encloses connections of the electrical contacts with lines leading to the brushes. Electrostatic charging of the connection piece according to the invention can be avoided with particularly little construction effort if an earth conductor protruding from the plug is led to a lower edge of the connection piece provided for connection to a housing of the electric motor.
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:The invention permits numerous embodiments. To further clarify its basic principle, one of these is shown in the drawings and is described below. This shows in:
Figur 1: schematisch eine Kraftstoffpumpe mit einem erfindungsgemäßen Anschlussstück,FIG. 1: schematically a fuel pump with a connection piece according to the invention,
Figur 2 : das erfindungsgemäße Anschlussstück ausFigure 2: the connector according to the invention
Fig. 1 im Teilschnitt,1 in partial section,
Figur 3 : eine stark vergrößerte Darstellung einer Einzelheit III des erfindungsgemäßen Anschluss- stücks aus Figur 2.FIG. 3: a greatly enlarged illustration of a detail III of the connecting piece according to the invention from 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.FIG. 1 shows a fuel pump with a pump stage 2 of a motor vehicle driven by an electric motor 1 and with a connecting piece 4 fastened on a housing 3.
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.The connection piece 4 has a connection piece 5 for a flow line leading to an internal combustion engine of the motor vehicle. 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 Feder- elementes 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 .Figure 2 shows the connector 4 of Figure 1 in an enlarged partial section. The electrical contacts 6 are arranged on a plug 7. The plug 7 is extrusion-coated with a plastic jacket 8, from which 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 connector 4 and by means of a spring element biased in the direction of the electric motor 1 shown in Figure 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 a pot-shaped recess in its center for direct mounting of a shaft of the electric motor 1. An earth conductor 16 is guided from the plug 7 to the lower edge of the connector 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 Zu- stand mit dem Anschlussstück 4 in Verbindung ste t. 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 the area of the edge 13 of the plug 7 and the recess 14 of the connector 4 in a greatly enlarged manner. It can be seen here that the plastic jacket 8 of the connector 7 is in direct contact with the recess 14 of the connector 4 via its edge 13. A circumferential sealing lip 17 is integrally formed on the plastic jacket 8 of the plug 7 in the area 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 connected to the connecting piece 4 in the assembled state. When fuel is conveyed by the fuel pump shown in FIG. 1, an overpressure arises within the housing 3, which acts on the plug 7 and thus on the sealing lip 17 and thus prestresses 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 connecting piece 4 are made of a plastic which is capable of swelling in fuel and have a transition fit or press fit. The plug 7 is thus inserted into the receptacle 12 of the connector 4 for assembly until the latching 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 connector 7 against the connector 4.

Claims

Patentansprüche claims
1. Anschlussstück für eine Kraftstoffpumpe mit einer Aufnahme, in der ein Stecker mit elektrischem Kontakten zur Verbindung eines Elektromotors der Kraftstoffpumpe mit einem Stromnetz angeordnet ist, wobei der Stecker mit Kunststoff umspritzt ist, dadurch gekenn z e i chne t , dass der Stecker (7) eine einteilig angeformte, umlaufende Dichtlippe (17) besitzt.1.Connection piece for a fuel pump with a receptacle in which a plug with electrical contacts for connecting an electric motor of the fuel pump to a power supply is arranged, the plug being extrusion-coated with plastic, characterized in that the plug (7) is a has one-piece, circumferential sealing lip (17).
2. Anschlussstück nach Anspruch 1, da durch ge kenn z e i chne t , dass die Dichtlippe (17) im Bereich der Durchführung (14) der elektrischen Kontakte (6) am Stecker (7) angeordnet ist.2. Connection piece according to claim 1, since by ge z e i chne t that the sealing lip (17) in the region of the implementation (14) of the electrical contacts (6) is arranged on the plug (7).
3. Anschlussstück nach Anspruch 1 oder 2, dadurch gekenn z e i chne t , dass die Dichtlippe (17) einen in Richtung der elektrischen Kontakte (6) weisenden Bereich (18) besitzt.3. Connector according to claim 1 or 2, characterized in that the sealing lip (17) has a region (18) pointing in the direction of the electrical contacts (6).
4. Anschlussstück nach zumindest einem der vorhergehenden Ansprüche, da durch gekennz e i chne t , dass die Dichtlippe (17) elastisch verformbar ist. 4. Connection piece according to at least one of the preceding claims, since by gekennz e i chne t that the sealing lip (17) is elastically deformable.
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
DE10313985 2003-03-27
DE10313985A DE10313985A1 (en) 2003-03-27 2003-03-27 Connector for a fuel pump
PCT/EP2004/002531 WO2004085823A1 (en) 2003-03-27 2004-03-11 Connection piece for a fuel pump

Publications (2)

Publication Number Publication Date
EP1532362A1 true EP1532362A1 (en) 2005-05-25
EP1532362B1 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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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10213995C1 (en) * 2002-03-27 2003-09-25 Siemens Ag Connection fitting for automobile engine fuel pump, has socket for reception of plug provided with electrical contacts for supplying current to pump motor
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EP1532362B1 (en) 2008-05-14
CN1701175A (en) 2005-11-23
ES2305782T3 (en) 2008-11-01
WO2004085823A1 (en) 2004-10-07
KR20050071630A (en) 2005-07-07
US20050287023A1 (en) 2005-12-29
DE502004007115D1 (en) 2008-06-26
DE10313985A1 (en) 2004-10-07
CN100374710C (en) 2008-03-12
KR100712326B1 (en) 2007-04-30

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