EP1463153B1 - Method for grounding a coated metallic pipe and coated metallic pipe - Google Patents

Method for grounding a coated metallic pipe and coated metallic pipe Download PDF

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Publication number
EP1463153B1
EP1463153B1 EP20040006168 EP04006168A EP1463153B1 EP 1463153 B1 EP1463153 B1 EP 1463153B1 EP 20040006168 EP20040006168 EP 20040006168 EP 04006168 A EP04006168 A EP 04006168A EP 1463153 B1 EP1463153 B1 EP 1463153B1
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EP
European Patent Office
Prior art keywords
metal pipe
connection point
electrically conductive
cover
vehicle
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
EP20040006168
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German (de)
French (fr)
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EP1463153A1 (en
Inventor
Andreas Sausner
Georg Weick
David Poirier
Delbert L. Adkins
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TI Automotive Heidelberg GmbH
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TI Automotive Heidelberg GmbH
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Filing date
Publication date
Priority claimed from DE10313242A external-priority patent/DE10313242A1/en
Application filed by TI Automotive Heidelberg GmbH filed Critical TI Automotive Heidelberg GmbH
Publication of EP1463153A1 publication Critical patent/EP1463153A1/en
Application granted granted Critical
Publication of EP1463153B1 publication Critical patent/EP1463153B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/643—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for rigid cylindrical bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • H01R4/726—Making a non-soldered electrical connection simultaneously with the heat shrinking

Definitions

  • the invention relates to a method for grounding a sheathed with an electrically non-conductive plastic layer, for transporting liquid or gaseous media, in particular fuels, used in a motor vehicle metal pipe to a metallic automotive part, in particular the chassis of the motor vehicle, wherein the plastic layer of the metal tube to a Connection is completely removed and then the junction is electrically connected to the motor vehicle part.
  • the metal pipe preferably consists of a single-layer welded or multi-layer soldered steel pipe which is externally provided with a base metal layer (eg of Al, Zn or Galfan) as a corrosion protection layer.
  • a base metal layer eg of Al, Zn or Galfan
  • US-A-4 612 423 discloses a metal tube sheathed with an electrically non-conductive plastic layer for transporting liquid or gaseous media, wherein the plastic layer of the metal tube is completely removed at a connection point and this connection point is electrically conductively connectable to a metallic part is applied to the metal tube, the junction point covering all sides cover member and at least at its ends along at least part of the circumference is pressed gap-free on the metal tube, and wherein the cover member is electrically conductively connected to the part.
  • the junction is electrically connected directly to the motor vehicle part. Due to the partially missing plastic layer in the region of the joint, unfortunately, the corrosion and abrasion resistance of the metal pipe deteriorates.
  • the invention relates to a jacketed metal tube according to claims 8 and 9 and a method according to claims 1 and 4.
  • the invention has for its object to achieve a perfect electrical connection between metal pipe and the other motor vehicle part, such as chassis, without affecting the corrosion and abrasion resistance in the context of the aforementioned measures.
  • the present invention teaches that first pushed onto the metal tube covering the joint on all sides or preferably more than covering the cover and then at least at its ends under at least part of the circumference applied radial pressure is pressed gap-free on the metal tube and that finally the Cover part is electrically connected to the motor vehicle part.
  • the cover member is pressed at least at its ends under the entire circumference applied radial pressure without gaps on the metal tube.
  • it is a cylindrical cover.
  • the invention is based on the consideration that the problem of the lack of corrosion and abrasion resistance of the metal tube can be eliminated by providing an additional covering a sealing of the exposed metal surface can be ensured, so that the product against external environmental influences, such as splash water contact, and the associated corrosion effects is protected.
  • the metal pipe is in particular a steel pipe.
  • an electrically conductive corrosion protection layer which consists of a base metal, for example of zinc or aluminum, is expediently located on the metal tube. It is within the scope of the invention that the corrosion protection layer is arranged between the metal tube and the plastic layer.
  • the plastic layer is removed at a certain point of the tube to a certain width.
  • the plastic layer can be mechanically removed, for example peeled off.
  • the plastic layer can also be removed by means of a laser treatment. The removal of the plastic layer can take place either over the entire circumference of the tube (360 °) or over a partial area of the circumference (for example 90 °).
  • the depth to which the plastic layer is removed in the radial direction of the tube extends either to the metal tube surface or to the electrically conductive corrosion protection layer.
  • the cover member is formed closed in the circumferential direction of the metal tube.
  • the cover consists of a metal ferrule, in particular of aluminum or stainless steel. It is recommended to press this ferrule mechanically.
  • the cover consists of a shrink tube section of electrically conductive or made conductive by additives plastic.
  • This shrink tube section is advantageously shrunk onto the metal tube by means of a temperature treatment.
  • this heat-shrinkable tube section is also provided on the inside with an electrically conductive adhesive coating.
  • a bead extending over the circumference of the tube is first produced on the tube.
  • the bead protrudes radially out of the tube surface. It is particularly within the scope of the invention to produce such a bead at an end portion of the tube.
  • at least the bead covering plastic layer is removed, and preferably over the entire circumference of the bead.
  • This exposed metallic surface of the bead then forms the junction of the metal tube. Due to the larger outer circumference of the bead, the connection point on such a bead has the advantage that the exposed metallic surface is larger than a corresponding connection point of the same width in another tube region.
  • a shrink tube section of electrically conductive plastic is applied / pushed onto the metal tube or on the bead.
  • This shrink tubing section is subsequently Shrunk by a temperature treatment on the metal tube or on the bead.
  • the shrink tube section can be provided on the inside with an electrically conductive adhesive coating.
  • a sheathed with an electrically non-conductive plastic layer 1 for transporting liquid or gaseous media, such as fuels used in a motor vehicle metal tube 2 on a metallic motor vehicle, such as the chassis of the motor vehicle, first the plastic layer 1 of the metal tube 2 at a Joint 3 completely removed over the entire circumference. Subsequently, a closed in the circumferential direction of the metal tube 2, the joint 3 on all sides more than covering cylindrical cover 4 is pushed onto the metal tube 2 and then pressed at least at its ends under the entire circumference applied radial pressure gap-free on the metal tube 2. Finally, the cover is electrically connected to the motor vehicle part, which is not shown in detail.
  • the cover 4 consists of a metallic ferrule made of aluminum or stainless steel. This ferrule 4 is mechanically pressed so that the ferrule 4 over its entire length and thus also in the exposed part 3 of the metal tube 2 has contact.
  • the cover part 4 consists of a heat-shrinkable tube section made of electrically conductive plastic or, as is known, made conductive by additives.
  • This shrink tubing section 4 has been shrunk onto the metal tube 2 by a temperature treatment, wherein the shrink tubing section 4 may have previously been provided with an electrically conductive adhesive coating on the inside.
  • the pressing-on of the cover part under radial pressure is thus realized by shrinking.
  • the cover part 4 consists of a heat-shrinkable tube section of electrically conductive plastic.
  • a bead 5 which circulates over the circumference of the tube was first produced on the tube.
  • the bead 5 covering plastic layer 1 has been removed and obtained in this way the joint 3 at the bead 5.
  • the heat shrink tubing section 4 has been shrunk onto the metal tube 2 or onto the bead 5 by means of a temperature treatment.
  • the shrink tube section 4 is provided on the inside with an electrically conductive adhesive coating 6.

Landscapes

  • Rigid Pipes And Flexible Pipes (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Details Of Indoor Wiring (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Erden eines mit einer elektrisch nicht leitenden Kunststoffschicht ummantelten, zum Transport von flüssigen oder gasförmigen Medien, insbesondere Kraftstoffen, in einem Kraftfahrzeug eingesetzten Metallrohres an einem metallischen Kraftfahrzeugteil, insbesondere dem Chassis des Kraftfahrzeuges, wobei die Kunststoffschicht des Metallrohres an einer Verbindungsstelle vollständig entfernt wird und anschließend die Verbindungsstelle elektrisch leitend mit dem Kraftfahrzeugteil verbunden wird.The invention relates to a method for grounding a sheathed with an electrically non-conductive plastic layer, for transporting liquid or gaseous media, in particular fuels, used in a motor vehicle metal pipe to a metallic automotive part, in particular the chassis of the motor vehicle, wherein the plastic layer of the metal tube to a Connection is completely removed and then the junction is electrically connected to the motor vehicle part.

Im Rahmen der Erfindung besteht das Metallrohr vorzugsweise aus einem einlagig geschweißten oder mehrlagig verlöteten Stahlrohr, das außen mit einer unedlen Metallschicht (z. B. aus Al, Zn oder Galfan) als Korrosionsschutzschicht versehen ist.In the context of the invention, the metal pipe preferably consists of a single-layer welded or multi-layer soldered steel pipe which is externally provided with a base metal layer (eg of Al, Zn or Galfan) as a corrosion protection layer.

Dokument US-A-4 612 423 ofenbart ein mit einer elektrisch nicht leitenden Kunststoffschicht ummanteltes Metallrohr zum Transport von flüssigen oder gasförmigen Medien, wobei die Kunststoffschicht des Metallrohres an einer Verbindungsstelle vollständig entfernt ist und diese Verbindungsstelle elektrisch leitend mit einem metallischen Teil verbindbar ist, wobei auf das Metallrohr ein die Verbindungsstelle allseitig abdeckendes Abdeckteil aufgebracht ist und zumindest an seinen Enden längs zumindest eines Teils des Umfangs spaltfrei auf das Metallrohr aufgepresst ist, und wobei das Abdeckteil elektrisch leitend mit dem Teil verbindbar ist.US-A-4 612 423 discloses a metal tube sheathed with an electrically non-conductive plastic layer for transporting liquid or gaseous media, wherein the plastic layer of the metal tube is completely removed at a connection point and this connection point is electrically conductively connectable to a metallic part is applied to the metal tube, the junction point covering all sides cover member and at least at its ends along at least part of the circumference is pressed gap-free on the metal tube, and wherein the cover member is electrically conductively connected to the part.

Bei einem aus der Praxis bekannten, druckschriftlich nicht näher belegten Verfahren der genannten Art wird die Verbindungsstelle unmittelbar elektrisch leitend mit dem Kraftfahrzeugteil verbunden. Aufgrund der teilweise fehlenden Kunststoffschicht im Bereich der Verbindungsstelle verschlechtert sich leider die Korrosions- und Abrasionsbeständigkeit des Metallrohres.In a well-known from the printed art, unspecified method of the type mentioned, the junction is electrically connected directly to the motor vehicle part. Due to the partially missing plastic layer in the region of the joint, unfortunately, the corrosion and abrasion resistance of the metal pipe deteriorates.

Gegenstand der Erfindung ist ein ummanteltes Metallrohr nach Ansprüchen 8 und 9 und ein Verfahren nach Ansprüchen 1 und 4.The invention relates to a jacketed metal tube according to claims 8 and 9 and a method according to claims 1 and 4.

Der Erfindung liegt die Aufgabe zugrunde, im Rahmen der eingangs genannten Maßnahmen eine einwandfreie elektrische Verbindung zwischen Metallrohr und dem anderen Kraftfahrzeugteil, wie Chassis, ohne Beeinträchtigung der Korrosions- und Abrasionsbeständigkeit zu erreichen.The invention has for its object to achieve a perfect electrical connection between metal pipe and the other motor vehicle part, such as chassis, without affecting the corrosion and abrasion resistance in the context of the aforementioned measures.

Hierzu lehrt die vorliegende Erfindung, dass auf das Metallrohr zunächst ein die Verbindungsstelle allseitig abdeckendes bzw. bevorzugt mehr als abdeckendes Abdeckteil aufgeschoben und anschließend zumindest an seinen Enden unter längs zumindest eines Teils des Umfanges aufgebrachtem radialen Druck spaltfrei auf das Metallrohr aufgepresst wird und dass abschließend das Abdeckteil elektrisch leitend mit dem Kraftfahrzeugteil verbunden wird. Das Abdeckteil ist zumindest an seinen Enden unter längs des gesamten Umfanges aufgebrachtem radialen Druck spaltfrei auf das Metallrohr aufgepresst werden. Zweckmäßigerweise handelt es sich um ein zylindrisches Abdeckteil.For this purpose, the present invention teaches that first pushed onto the metal tube covering the joint on all sides or preferably more than covering the cover and then at least at its ends under at least part of the circumference applied radial pressure is pressed gap-free on the metal tube and that finally the Cover part is electrically connected to the motor vehicle part. The cover member is pressed at least at its ends under the entire circumference applied radial pressure without gaps on the metal tube. Appropriately, it is a cylindrical cover.

Die Erfindung geht hierbei von der Überlegung aus, dass das Problem der mangelnden Korrosions- und Abrasionsbeständigkeit des Metallrohres dadurch beseitigt werden kann, dass über ein zusätzliches Abdeckteil eine Versiegelung der freigelegten Metalloberfläche gewährleistet werden kann, so dass das Produkt vor externen Umwelteinflüssen, wie Spritzwasserkontakt, und den damit verbundenen Korrosionseffekten geschützt ist.The invention is based on the consideration that the problem of the lack of corrosion and abrasion resistance of the metal tube can be eliminated by providing an additional covering a sealing of the exposed metal surface can be ensured, so that the product against external environmental influences, such as splash water contact, and the associated corrosion effects is protected.

Bei dem Metallrohr handelt es sich insbesondere um ein Stahlrohr. Wie eingangs bereits dargelegt, befindet sich auf dem Metallrohr zweckmäßigerweise eine elektrisch leitfähige Korrosionsschutzschicht, die aus einem unedlen Metall, beispielsweise aus Zink oder Aluminium besteht. Es liegt im Rahmen der Erfindung, dass die Korrosionsschutzschicht zwischen dem Metallrohr und der Kunststoffschicht angeordnet ist.The metal pipe is in particular a steel pipe. As already explained, an electrically conductive corrosion protection layer, which consists of a base metal, for example of zinc or aluminum, is expediently located on the metal tube. It is within the scope of the invention that the corrosion protection layer is arranged between the metal tube and the plastic layer.

Die Kunststoffschicht wird an einer bestimmten Stelle des Rohres auf einer bestimmten Breite entfernt. Dabei kann die Kunststoffschicht nach einer Ausführungsform mechanisch entfernt werden, beispielsweise abgeschält werden. Nach einer anderen Ausführungsform der Erfindung kann die Kunststoffschicht aber auch mit Hilfe einer Laserbehandlung entfernt werden. Die Entfernung der Kunststoffschicht kann entweder über den gesamten Umfang des Rohres (360°) oder über einen Teilbereich des Umfanges (beispielsweise 90°) stattfinden. Die Tiefe, bis zu der die Kunststoffschicht in radialer Richtung des Rohres entfernt wird, reicht entweder bis zur Metallrohroberfläche oder bis zu der elektrisch leitfähigen Korrosionsschutzschicht.The plastic layer is removed at a certain point of the tube to a certain width. In this case, according to one embodiment, the plastic layer can be mechanically removed, for example peeled off. According to another embodiment of the invention, however, the plastic layer can also be removed by means of a laser treatment. The removal of the plastic layer can take place either over the entire circumference of the tube (360 °) or over a partial area of the circumference (for example 90 °). The depth to which the plastic layer is removed in the radial direction of the tube extends either to the metal tube surface or to the electrically conductive corrosion protection layer.

Für die Ausgestaltung des Abdeckteils bzw. des elektrisch leitfähigen Abdeckteils bestehen im Rahmen der Erfindung mehrere Möglichkeiten. Nach einer Ausführungsform ist das Abdeckteil in Umfangsrichtung des Metallrohres geschlossen ausgebildet. Gemäß einer ersten bevorzugten Ausführungsform besteht das Abdeckteil aus einer metallischen Quetschhülse, insbesondere aus Aluminium oder Edelstahl. Es empfiehlt sich, diese Quetschhülse mechanisch aufzupressen.For the embodiment of the cover or of the electrically conductive cover there are several possibilities within the scope of the invention. According to one embodiment, the cover member is formed closed in the circumferential direction of the metal tube. According to a first preferred embodiment, the cover consists of a metal ferrule, in particular of aluminum or stainless steel. It is recommended to press this ferrule mechanically.

Bei einer zweiten sehr bevorzugten Ausführungsform besteht das Abdeckteil aus einem Schrumpfschlauchabschnitt aus elektrisch leitfähigem bzw. durch Zusätze leitfähig gemachtem Kunststoff. Dieser Schrumpfschlauchabschnitt wird vorteilhafterweise durch eine Temperaturbehandlung auf das Metallrohr aufgeschrumpft. Dabei ist dieser Schrumpfschlauchabschnitt nach einer Ausführungsform innenseitig auch noch mit einer elektrisch leitfähigen Klebebeschichtung versehen.In a second very preferred embodiment, the cover consists of a shrink tube section of electrically conductive or made conductive by additives plastic. This shrink tube section is advantageously shrunk onto the metal tube by means of a temperature treatment. In this case, according to one embodiment, this heat-shrinkable tube section is also provided on the inside with an electrically conductive adhesive coating.

Nach einer besonderen Ausführungsform der Erfindung wird an dem Rohr zunächst ein über den Umfang des Rohres umlaufender Wulst erzeugt. Der Wulst ragt aus der Rohroberfläche radial heraus. Es liegt insbesondere im Rahmen der Erfindung, einen solchen Wulst an einem Endabschnitt des Rohres zu erzeugen. Zweckmäßigerweise wird zumindest die den Wulst bedeckende Kunststoffschicht entfernt und zwar vorzugsweise über den gesamten Umfang des Wulstes. Diese freigelegte metallische Oberfläche des Wulstes bildet dann die Verbindungsstelle des Metallrohres. Die Verbindungsstelle an einem solchen Wulst hat aufgrund des größeren Außenumfanges des Wulstes den Vorteil, dass die freigelegte metallische Oberfläche größer ist als eine entsprechende Verbindungsstelle gleicher Breite in einem sonstigen Rohrbereich. - Erfindungsgemäß wird dann ein Schrumpfschlauchabschnitt aus elektrisch leitfähigem Kunststoff auf das Metallrohr bzw. auf den Wulst aufgebracht/aufgeschoben. Dieser Schrumpfschlauchabschnitt wird anschließend durch eine Temperaturbehandlung auf das Metallrohr bzw. auf den Wulst aufgeschrumpft. Der Schrumpfschlauchabschnitt kann dabei innenseitig mit einer elektrisch leitfähigen Klebebeschichtung versehen sein.According to a particular embodiment of the invention, a bead extending over the circumference of the tube is first produced on the tube. The bead protrudes radially out of the tube surface. It is particularly within the scope of the invention to produce such a bead at an end portion of the tube. Conveniently, at least the bead covering plastic layer is removed, and preferably over the entire circumference of the bead. This exposed metallic surface of the bead then forms the junction of the metal tube. Due to the larger outer circumference of the bead, the connection point on such a bead has the advantage that the exposed metallic surface is larger than a corresponding connection point of the same width in another tube region. - According to the invention then a shrink tube section of electrically conductive plastic is applied / pushed onto the metal tube or on the bead. This shrink tubing section is subsequently Shrunk by a temperature treatment on the metal tube or on the bead. The shrink tube section can be provided on the inside with an electrically conductive adhesive coating.

Im Folgenden wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen

Fig. 1
einen Querschnitt durch eine elektrisch leitende Verbindung eines Metallrohres mit einem Kraftfahrzeugteil,
Fig. 2
eine zweite Ausführungsform einer solchen Verbindung und
Fig. 3
eine dritte Ausführungsform des Gegenstandes nach Fig. 1.
In the following the invention will be explained in more detail with reference to a drawing illustrating an embodiment. Show it
Fig. 1
a cross section through an electrically conductive connection of a metal tube with a motor vehicle part,
Fig. 2
a second embodiment of such a compound and
Fig. 3
A third embodiment of the article according to FIG. 1.

Zum Erden eines mit einer elektrisch nicht leitenden Kunststoffschicht 1 ummantelten, zum Transport von flüssigen oder gasförmigen Medien, wie Kraftstoffen, in einem Kraftfahrzeug eingesetzten Metallrohres 2 an einem metallischen Kraftfahrzeug, wie dem Chassis des Kraftfahrzeuges, wird zunächst die Kunststoffschicht 1 des Metallrohres 2 an einer Verbindungsstelle 3 über den gesamten Umfang vollständig entfernt. Anschließend wird auf das Metallrohr 2 ein in Umfangsrichtung des Metallrohres 2 geschlossenes, die Verbindungsstelle 3 allseitig mehr als abdeckendes zylindrisches Abdeckteil 4 aufgeschoben und anschließend zumindest an seinen Enden unter längs des gesamten Umfanges aufgebrachtem radialen Druck spaltfrei auf das Metallrohr 2 aufgepresst. Abschließend wird das Abdeckteil elektrisch leitend mit dem Kraftfahrzeugteil verbunden, was im Einzelnen nicht mehr dargestellt ist.For grounding a sheathed with an electrically non-conductive plastic layer 1, for transporting liquid or gaseous media, such as fuels used in a motor vehicle metal tube 2 on a metallic motor vehicle, such as the chassis of the motor vehicle, first the plastic layer 1 of the metal tube 2 at a Joint 3 completely removed over the entire circumference. Subsequently, a closed in the circumferential direction of the metal tube 2, the joint 3 on all sides more than covering cylindrical cover 4 is pushed onto the metal tube 2 and then pressed at least at its ends under the entire circumference applied radial pressure gap-free on the metal tube 2. Finally, the cover is electrically connected to the motor vehicle part, which is not shown in detail.

Bei der Ausführungsform nach Fig. 1 besteht das Abdeckteil 4 aus einer metallischen Quetschhülse aus Aluminium oder Edelstahl. Diese Quetschhülse 4 wird mechanisch so aufgepresst, dass die Quetschhülse 4 über ihre gesamte Länge und damit auch im freigelegten Teil 3 des Metallrohres 2 Kontakt hat.In the embodiment of Fig. 1, the cover 4 consists of a metallic ferrule made of aluminum or stainless steel. This ferrule 4 is mechanically pressed so that the ferrule 4 over its entire length and thus also in the exposed part 3 of the metal tube 2 has contact.

Bei der Ausführungsform nach Fig. 2 besteht das Abdeckteil 4 aus einem Schrumpfschlauchabschnitt aus elektrisch leitfähigem bzw. wie bekannt durch Zusätze leitfähig gemachtem Kunststoff. Dieser Schrumpfschlauchabschnitt 4 ist durch eine Temperaturbehandlung auf das Metallrohr 2 aufgeschrumpft worden, wobei der Schrumpfschlauchabschnitt 4 innenseitig zuvor noch mit einer elektrisch leitfähigen Klebebeschichtung versehen worden sein kann. Bei dieser Ausführungsform und bei der nachfolgend erläuterten in Fig. 3 dargestellten Ausführungsform wird also das Aufpressen des Abdeckteils unter radialem Druck durch ein Aufschrumpfen verwirklicht.In the embodiment according to FIG. 2, the cover part 4 consists of a heat-shrinkable tube section made of electrically conductive plastic or, as is known, made conductive by additives. This shrink tubing section 4 has been shrunk onto the metal tube 2 by a temperature treatment, wherein the shrink tubing section 4 may have previously been provided with an electrically conductive adhesive coating on the inside. In this embodiment and in the embodiment illustrated in FIG. 3, the pressing-on of the cover part under radial pressure is thus realized by shrinking.

Auch bei der Ausführungsform gemäß Fig. 3 besteht das Abdeckteil 4 aus einem Schrumpfschlauchabschnitt aus elektrisch leitfähigem Kunststoff. Bei dieser Ausführungsform wurde an dem Rohr zunächst ein über den Umfang des Rohres umlaufender Wulst 5 erzeugt. Die den Wulst 5 bedeckende Kunststoffschicht 1 wurde entfernt und auf diese Weise die Verbindungsstelle 3 an dem Wulst 5 erhalten. Der Schrumpfschlauchabschnitt 4 ist durch eine Temperaturbehandlung auf das Metallrohr 2 bzw. auf den Wulst 5 aufgeschrumpft worden. Auch bei dieser Ausführungsform ist der Schrumpfschlauchabschnitt 4 innenseitig mit einer elektrisch leitfähigen Klebebeschichtung 6 versehen.Also in the embodiment according to FIG. 3, the cover part 4 consists of a heat-shrinkable tube section of electrically conductive plastic. In this embodiment, a bead 5 which circulates over the circumference of the tube was first produced on the tube. The bead 5 covering plastic layer 1 has been removed and obtained in this way the joint 3 at the bead 5. The heat shrink tubing section 4 has been shrunk onto the metal tube 2 or onto the bead 5 by means of a temperature treatment. Also in this embodiment, the shrink tube section 4 is provided on the inside with an electrically conductive adhesive coating 6.

Claims (10)

  1. Process of grounding a metal pipe (2) sheathed with electrically non-conductive plastic coating (1), said metal pipe (2) meant for transporting liquid or gaseous media, in particular fuels, said metal pipe (2) used on a metallic vehicle part, in particular on the chassis of the vehicle, wherein the plastic coating (1) on said metal pipe (2) is fully stripped at a connection point (3) and thereafter the connection point (3) is connected with the electrically conductive vehicle part, wherein on said metal pipe (2) first a cover (4) that conceals the connection point (3) on all sides or on more than all sides in the form of a metallic ferrule is pushed over said pipe and thereafter under longitudinally applied radial force, at least on its ends, a part of the circumference is tightly squeezed onto the metal pipe (2), and wherein the cover (4) is then connected with the electrically conductive vehicle part.
  2. Process according to claim 1, wherein the ferrule (4) is made of aluminium or stainless steel.
  3. Process according to one of claims 1 or 2, wherein the ferrule (4) is mechanically pressed on.
  4. Process of grounding a metal pipe (2) sheathed with electrically non-conductive plastic coating (1), said metal pipe (2) for transporting liquid or gaseous media, in particular fuels, is used on a metallic vehicle part, in particular on the chassis of the vehicle, wherein the plastic coating (1) on said metal pipe (2) is fully stripped at a connection point (3) and thereafter the connection point (3) is connected with the electrically conductive vehicle part, wherein on said metal pipe (2) first a cover (4) that conceals the connection point (3) on all sides or on more than all sides in the form of a heat-shrinking sleeve section consisting of an electrically conductive plastic is pushed over said pipe and thereafter, at least under longitudinally applied radial force on its ends, a part of the circumference is tightly squeezed onto the metal pipe (2), in that the heat-shrinking sleeve section is shrunk on said metal pipe by means of heat treatment, and wherein the cover (4) is finally connected with the electrically conductive vehicle part.
  5. Process according to claim 4, wherein on the metal pipe (2) at least a surrounding collar (5) is formed along the circumference of the metal pipe (2) and wherein the plastic coating (1) covering the collar (5) is stripped at least over a part of the collar circumference, preferably over the entire collar circumference and wherein the heat-shrinking sleeve section (4) consisting of electrically conductive plastic is pushed on the connection point (3) onto the collar (5).
  6. Process according one of claims 4 or 5, wherein the internal side of the heat-shrinking sleeve section (4) is provided with an electrically conductive adhesive coating.
  7. Process according one of claims 1 to 6, characterised in that the cover (4) in the circumferential direction of the metal pipe (2) is formed in a closed manner.
  8. A metal pipe (2) sheathed with an electrically non-conductive plastic coating (1) on said metal pipe (2) for transporting liquid or gaseous media, in particular fuels in a vehicle, wherein the plastic coating (1) of said metal pipe (2) is fully stripped at a connection point (3) and thereafter said connection point (3) is connectable with an electrically conductive vehicle part, in particular with the chassis of the vehicle, wherein on said metal pipe (2) a cover (4) that conceals the connection point (3) on all sides or on more than all sides, in the form of a metallic ferrule, is pushed over said pipe and at least along at least a part of the circumference is tightly squeezed onto the metal pipe (2), and wherein the electrically conductive cover (4) is connectable with the vehicle part.
  9. A metal pipe (2) sheathed with an electrically non-conductive plastic coating (1), said metal pipe (2) meant for transporting liquid or gaseous media, in particular fuels in a vehicle, wherein the plastic coating (1) of said metal pipe (2) is fully stripped at a connection point (3) and this connection point (3) is connectable with an electrically conductive vehicle part, in particular with the chassis of the vehicle, wherein on said metal pipe (2) a cover (4) that conceals the connection point (3) on all sides is pushed over said pipe and at least along at least a part of the circumference on its ends is tightly squeezed onto the metal pipe (2), wherein this cover (4) is electrically conductive plastic, and wherein the electrically conductive cover (4) is connectable with the vehicle part.
  10. Sheathed metal pipe according to claim 9, wherein the metal pipe (2) features a radially protruding collar (5) at the connection point (3), whereby the collar (5) is in contact with the cover (4).
EP20040006168 2003-03-25 2004-03-16 Method for grounding a coated metallic pipe and coated metallic pipe Expired - Lifetime EP1463153B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10313242 2003-03-25
DE10313242A DE10313242A1 (en) 2003-03-25 2003-03-25 Method of earthing a jacketed metal pipe
US796934 2004-03-09
US10/796,934 US7308758B2 (en) 2003-03-25 2004-03-09 Method for making sheathed metal tube

Publications (2)

Publication Number Publication Date
EP1463153A1 EP1463153A1 (en) 2004-09-29
EP1463153B1 true EP1463153B1 (en) 2006-11-29

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Application Number Title Priority Date Filing Date
EP20040006168 Expired - Lifetime EP1463153B1 (en) 2003-03-25 2004-03-16 Method for grounding a coated metallic pipe and coated metallic pipe

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EP (1) EP1463153B1 (en)
JP (1) JP4043449B2 (en)
DE (1) DE502004002134D1 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584845A (en) * 1944-04-10 1947-01-23 Tinnerman Products Inc Improvements relating to earthing clamps for conduits and similar members
FR1361621A (en) * 1963-05-08 1964-05-22 Amp Inc Electrical connector
IT1130318B (en) * 1979-03-09 1986-06-11 Raychem Pontoise Sa HEAT RECOVERABLE ELEMENT
DE3311651A1 (en) * 1983-03-30 1984-10-04 Siemens AG, 1000 Berlin und 8000 München Device for making electrical contact with a cable screen
CA1314375C (en) * 1987-09-09 1993-03-16 Raychem A/S Heat recoverable article
FR2683679B1 (en) * 1991-11-12 1994-02-04 Aerospatiale Ste Nationale Indle METHOD FOR CONNECTING THE SHIELDING OF AT LEAST ONE SHIELDED ELECTRICAL CABLE TO AN ELECTRICAL CONNECTION CONDUCTOR, AND CONNECTION OBTAINED BY CARRYING OUT SAID METHOD.
EP0744788B1 (en) * 1995-05-20 1999-07-21 Alcatel Device for electrically contacting a metallic pipe
EP0779692A1 (en) * 1995-12-13 1997-06-18 Studer Draht-und Kabelwerk AG Process for earthing a screen of an electrical cable and electrical cable
US6202300B1 (en) * 1998-06-05 2001-03-20 Chrysler Corporation Method for electrical grounding of vehicular components
DE19841199A1 (en) * 1998-08-24 2000-03-02 Daume Karin Device for electrically contacting an electrically conductive part of an in particular elongated, for example essentially cylindrical body, for example a pipe or a cable
US6976510B2 (en) * 2000-01-19 2005-12-20 Itt Manufacturing Enterprises, Inc. Corrosion resistant metal tube and process for making the same
ES2382996T3 (en) * 2002-07-30 2012-06-15 TI Automotive (Fuldabrück) GmbH Grounding procedure of a lined metal tube and clamp to implement the procedure

Also Published As

Publication number Publication date
JP4043449B2 (en) 2008-02-06
EP1463153A1 (en) 2004-09-29
DE502004002134D1 (en) 2007-01-11
JP2004291959A (en) 2004-10-21

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