EP2874234B1 - Method for sealing a joint between a conductor and a contact element - Google Patents

Method for sealing a joint between a conductor and a contact element Download PDF

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Publication number
EP2874234B1
EP2874234B1 EP13306568.0A EP13306568A EP2874234B1 EP 2874234 B1 EP2874234 B1 EP 2874234B1 EP 13306568 A EP13306568 A EP 13306568A EP 2874234 B1 EP2874234 B1 EP 2874234B1
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EP
European Patent Office
Prior art keywords
conductor
contact element
insulation
tube
piece
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EP13306568.0A
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German (de)
French (fr)
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EP2874234A1 (en
Inventor
Helmut Steinberg
Gerhard Lindner
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Nexans SA
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Nexans SA
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    • 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
    • H01R4/70—Insulation of connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/005—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing

Definitions

  • the invention relates to a method for sealing the connection point between an electrical conductor and an electrical contact element according to the preamble of patent claim 1.
  • At the junction between the conductor insulation and connected to the stripped conductor end contact element may be a conditional, inter alia, by the crimp gap exist, through which the metallic compound conductor contact element is exposed and exposed to environmental influences.
  • oxygen or moisture can reach the individual conductor and lead to corrosion on the same.
  • contact element and conductors made of different metals for example, aluminum and copper
  • Corrosion results in increased contact resistance between the conductor and the contact element and may affect the strength of the metallic connection.
  • moisture and in particular water penetrates through the gap between the conductor and the insulation in the line direction, which can lead to a short circuit between attached to the other end of the conductor contact elements.
  • the gap at the junction between the insulation and the contact element must be sealed media-tight.
  • shrink tube which is provided on its inside with a hot melt adhesive and contracts when heated around the junction.
  • the material connection of shrink tubing and adhesive is not optimally resistant to strong temperature fluctuations, which may be exposed to the conductors and contact elements.
  • the joint can also be overmolded directly with a plastic in a special injection molding process to form an insulating body around the joint.
  • the Schrumpfschlauch- and overmolding have the disadvantage that they are relatively time consuming, costly and not optimally suitable for single conductors.
  • a single-wire seal near the stripped conductor end may be crimped around the conductor insulation, for example by means of a cable lug.
  • the contacted individual conductor can then be inserted into the opening of a housing, that the connection point is within the housing. However, it is not the junction itself sealed between stripped conductor end and cable lug.
  • From the EP 2 624 395 A1 shows a method by which a connected to a wire made of aluminum wire contact element is covered by a corrosion-resistant tube.
  • the corrosion-resistant hose is initially positioned as a winding on the wire. It surrounds the contact element in its mounting position and protrudes from the wire at one end to a serving as a water barrier wall at the other end on which it rests.
  • the FR 2 503 476 A describes a method by which the connection point between the electrical conductor of an electric cable and a contact element is covered by a tube using a tubular mandrel.
  • the cable has an insulation surrounding the conductor, which is surrounded by a screen.
  • Above the screen is a metallic reinforcement, which is surrounded by an outer jacket.
  • the hose is first applied to its mounting on the cable end at a great length on the mandrel.
  • the mandrel is then broken in its central region and the broken end is pulled out of the tube.
  • the thereby freed end of the tube is wound up and positioned as a roll over the end of the remaining mandrel.
  • This part of the mandrel is then placed on the stripped conductor of the cable to the abutment against the beveled insulation of the conductor. Thereafter, the winding of the hose located on the mandrel is unwound until it covers the insulation of the conductor, the screen, the reinforcement and the jacket. The end remote from this end of the tube is then unwound from the mandrel and positioned as a wrap over the insulation of the conductor of the cable. The mandrel is then removed and a contact element is connected to the conductor. Finally, the on the insulation located winding of the hose unwound over the contact element.
  • the invention has for its object to provide an improved method by which the metallic compound single-conductor contact element can be securely sealed against moisture and other media.
  • This method allows the sealing of the junction between an electrical conductor and a contact element connected to the same in simple steps, and cost and in a well-suited for single conductor manner. Due to the elasticity of the piece of hose this is pressed under tension by its elastic forces firmly to the insulation of the conductor on the one hand and the tubular contact element on the other hand to seal the connection point media-tight.
  • the method is preferably carried out fully automatically. It is particularly suitable for serial production. As a result, it is particularly advantageous if a large number of individual conductors are provided with contact elements in a media-tight manner, quickly and easily.
  • Fig. 1 shows an electrical conductor 1, which is surrounded by an insulation 2.
  • the conductor 1 is for example a solid conductor or a stranded conductor and is preferably made of aluminum. At its end, the conductor 1 is freed from its insulation 2 in order to be electrically connected to a contact element.
  • An electrical contact element 3 is in Fig. 2 shown schematically.
  • the contact element 3 is preferably made of copper or a copper alloy and is to be connected for example by crimping or pressing with the conductor 1.
  • the contact element 3 has at the end 4, in which the stripped conductor end is to be inserted, a tubular cross-section 5. It is also possible to weld the contact element 3 to the conductor end.
  • the other, flat end 7 of the contact element 3 is connected to further electrical conductors, for which the flat end 7 may have a hole 6, for example.
  • FIG Fig. 3 A piece of tubing used in the method is shown in FIG Fig. 3 shown in a preferred embodiment.
  • the hose piece 8 consists of a permanently elastic insulating material, for example, neoprene from DuPont.
  • the hose piece 8 has a tubular cross-section. In addition, it may have one or more circumferentially disposed ribs 12. These cause an even firmer fit of the tube piece 8 on the insulation 2 of the conductor 1, since they are slightly pressed into the surface of the insulation 2.
  • the conductor 1 is stripped off at its end.
  • the elastic piece of hose 8 is applied to the insulation 2 of the conductor 1 that a first end 9 of the hose piece 8 rests firmly on the insulation 2, wherein a second end 10 of the hose piece 8 is bent over the first end 9.
  • Fig. 4A shown schematically.
  • the contact element 3 is then plugged onto the stripped conductor end and electrically conductively connected thereto.
  • the tubular cross-section of the contact element 3 is pressed in its central region to abut firmly on the stripped conductor end and to be materially and / or non-positively connected thereto.
  • the contact element 3 is connected to the conductor 1 so that its circular-cylindrical outer surface is maintained in the region adjacent to the insulation 2 of the conductor 1. Finally, the bent-over second end 10 of the hose piece 8 is bent back over the contact element 3 under firm contact therewith. How out Fig. 4B can be seen, the hose piece 8 extends over a portion of the insulation 2 of the conductor 1 and over the first, tubular end 4 of the contact element. 3
  • the second end 10 of the tube piece 8 is first bent, as in Fig. 5 shown.
  • the tube piece 8 is then expanded in a bent form mechanically, pneumatically or hydraulically in order to be able to apply it to the insulation 2 of the conductor 1.
  • the connection point between the conductor 1 and contact element 3 and in particular the possibly existing gap 13 is sealed completely media-tight between the contact element 3 and the insulation 2 of the conductor 1.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Abdichten der Verbindungsstelle zwischen einem elektrischen Leiter und einem elektrischen Kontaktelement gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for sealing the connection point between an electrical conductor and an electrical contact element according to the preamble of patent claim 1.

In der Elektrotechnik und insbesondere in der Automobilelektronik kommt eine Vielzahl von elektrischen Einzelleitern und mit diesen verbundenen Kontaktelementen aus elektrisch leitendem Material zum Einsatz, um elektrische Verbindungen zu Aktuatoren, Sensoren, Steuerelementen, Batterien usw. herzustellen. Beispielsweise in Fahrzeugen mit elektrischem Antrieb oder Hybridantrieb gibt es eine zunehmende Anzahl von Kontaktelementen, an welche elektrische Leiter angeschlossen werden müssen. In den meisten Fällen handelt es sich dabei um flexible isolierte Litzenleiter. Die Kontaktelemente sind Elemente aus Metall, beispielsweise Kabelschuhe, welche so beschaffen sind, daß sie an ein abisoliertes Leiterende gecrimpt oder mit diesem verschweißt werden können. Der Einzelleiter und das Kontaktelement werden dabei kraft- und/oder stoffschlüssig miteinander verbunden.In electrical engineering, and in particular in automotive electronics, a large number of individual electrical conductors and contact elements made of electrically conductive material are used in order to produce electrical connections to actuators, sensors, control elements, batteries, etc. For example, in vehicles with electric drive or hybrid drive, there are an increasing number of contact elements to which electrical conductors must be connected. In most cases these are flexible insulated stranded conductors. The contact elements are elements of metal, such as lugs, which are such that they can be crimped or welded to a stripped conductor end. The single conductor and the contact element are thereby non-positively and / or materially connected to each other.

An der Verbindungsstelle zwischen der Leiterisolierung und dem mit dem abisolierten Leiterende verbundenen Kontaktelement kann ein unter anderem durch den Crimpvorgang bedingter Spalt bestehen, durch welchen die metallische Verbindung Leiter-Kontaktelement offen liegt und Umwelteinflüssen ausgesetzt ist. Dadurch kann beispielsweise Sauerstoff oder Feuchtigkeit an den Einzelleiter gelangen und zu Korrosion an demselben führen. Bestehen, wie in den meisten Fällen, Kontaktelement und Leiter aus unterschiedlichen Metallen (beispielsweise Aluminium und Kupfer), so kann es bei einwirkender Feuchtigkeit aufgrund der unterschiedlichen elektrochemischen Standardpotentiale der Metalle zu Kontaktkorrosion kommen. Korrosion hat einen erhöhten Übergangswiderstand zwischen Leiter und Kontaktelement zur Folge und kann die Festigkeit der metallischen Verbindung beeinträchtigen. Weiterhin ist es möglich, daß Feuchtigkeit und insbesondere Wasser durch den Spalt zwischen dem Leiter und der Isolierung in Leitungsrichtung vordringt, was zu einem Kurzschluß zwischen am anderen Leiterende angebrachten Kontaktelementen führen kann.At the junction between the conductor insulation and connected to the stripped conductor end contact element may be a conditional, inter alia, by the crimp gap exist, through which the metallic compound conductor contact element is exposed and exposed to environmental influences. As a result, for example, oxygen or moisture can reach the individual conductor and lead to corrosion on the same. Consisting, as in most cases, contact element and conductors made of different metals (for example, aluminum and copper), so it can be exposed to moisture due to the different electrochemical standard potentials of the metals come to contact corrosion. Corrosion results in increased contact resistance between the conductor and the contact element and may affect the strength of the metallic connection. Furthermore, it is possible that moisture and in particular water penetrates through the gap between the conductor and the insulation in the line direction, which can lead to a short circuit between attached to the other end of the conductor contact elements.

Um derartige Funktionsstörungen zu vermeiden, muß der Spalt an der Verbindungsstelle zwischen der Isolierung und dem Kontaktelement mediendicht abgedichtet werden.In order to avoid such malfunctions, the gap at the junction between the insulation and the contact element must be sealed media-tight.

Beispielsweise kann um die Verbindungsstelle ein Schrumpfschlauch gebracht werden, welcher auf seiner Innenseite mit einem Heißklebstoff versehen ist und sich beim Erhitzen um die Verbindungsstelle zusammenzieht. Die Materialverbindung von Schrumpfschlauch und Klebstoff ist jedoch gegenüber starken Temperaturschwankungen, denen die Leiter und Kontaktelemente ausgesetzt sein können, nicht optimal beständig.For example, can be brought to the junction a shrink tube, which is provided on its inside with a hot melt adhesive and contracts when heated around the junction. However, the material connection of shrink tubing and adhesive is not optimally resistant to strong temperature fluctuations, which may be exposed to the conductors and contact elements.

Die Verbindungsstelle kann auch direkt in einem speziellen Spritzgießverfahren mit einem Kunststoff umspritzt werden, um einen isolierenden Körper um die Verbindungsstelle zu formen.The joint can also be overmolded directly with a plastic in a special injection molding process to form an insulating body around the joint.

Die Schrumpfschlauch- und Umspritzverfahren haben den Nachteil, daß sie relativ zeitaufwendig, kostspielig und nicht optimal für Einzelleiter geeignet sind.The Schrumpfschlauch- and overmolding have the disadvantage that they are relatively time consuming, costly and not optimally suitable for single conductors.

Alternativ kann eine Einzeladerdichtung in der Nähe des abisolierten Leiterendes, beispielsweise mittels eines Kabelschuhs, um die Leiterisolierung gecrimpt werden. Der kontaktierte Einzelleiter kann dann so in die Öffnung eines Gehäuses gesteckt werden, daß die Verbindungsstelle innerhalb des Gehäuses liegt. Dabei wird allerdings nicht die Verbindungsstelle selbst zwischen abisoliertem Leiterende und Kabelschuh abgedichtet.Alternatively, a single-wire seal near the stripped conductor end may be crimped around the conductor insulation, for example by means of a cable lug. The contacted individual conductor can then be inserted into the opening of a housing, that the connection point is within the housing. However, it is not the junction itself sealed between stripped conductor end and cable lug.

Allen genannten Methoden ist gemein, daß die Abdichtung der Verbindungsstelle gegenüber Feuchtigkeit und anderen Umwelteinflüssen nicht in jedem Fall ausreichend und zufriedenstellend ist.All these methods have in common that the sealing of the joint against moisture and other environmental influences is not always sufficient and satisfactory.

Aus der EP 2 624 395 A1 geht ein Verfahren hervor, mit dem ein an einen aus Aluminium bestehenden Draht angeschlossenes Kontaktelement durch einen korrosionsbeständigen Schlauch abgedeckt wird. Der korrosionsbeständige Schlauch ist zunächst als Wickel auf dem Draht positioniert. Er umgibt in seiner Montageposition das Kontaktelement und ragt vom Draht an seinem einen Ende bis zu einer als Wassersperre dienenden Wand am anderen Ende, auf welcher er aufliegt.From the EP 2 624 395 A1 shows a method by which a connected to a wire made of aluminum wire contact element is covered by a corrosion-resistant tube. The corrosion-resistant hose is initially positioned as a winding on the wire. It surrounds the contact element in its mounting position and protrudes from the wire at one end to a serving as a water barrier wall at the other end on which it rests.

Die FR 2 503 476 A beschreibt ein Verfahren, mit dem unter Einsatz eines rohrförmigen Dorns die Verbindungsstelle zwischen dem elektrischen Leiter eines elektrischen Kabels und einem Kontaktelement durch einen Schlauch abgedeckt wird. Das Kabel hat eine den Leiter umgebende Isolierung, die von einem Schirm umgeben ist. Über dem Schirm ist eine metallische Bewehrung angeordnet, die von einem äußeren Mantel umgeben ist. Der Schlauch wird zu seiner Montage auf dem Kabelende zunächst in großer Länge auf den Dorn aufgebracht. Der Dorn wird dann in seinem mittleren Bereich zerbrochen und das abgebrochene Ende wird aus dem Schlauch herausgezogen. Das dabei frei gewordene Ende des Schlauchs wird aufgewickelt und als Wickel über dem Ende des verbliebenen Dorns positioniert. Dieser Teil des Dorns wird danach auf den abisolierten Leiter des Kabels bis zur Anlage an der abgeschrägten Isolierung des Leiters gesteckt. Daraufhin wird der auf dem Dorn befindliche Wickel des Schlauchs abgewickelt, bis er die Isolierung des Leiters, den Schirm, die Bewehrung und den Mantel abdeckt. Das von diesem Ende des Schlauchs abgewandte Ende desselben wird dann vom Dorn abgewickelt und als Wickel über der Isolierung des Leiters des Kabels positioniert. Der Dorn wird danach entfernt und ein Kontaktelement wird an den Leiter angeschlossen. Abschließend wird der auf der Isolierung befindliche Wickel des Schlauchs bis über das Kontaktelement abgewickelt.The FR 2 503 476 A describes a method by which the connection point between the electrical conductor of an electric cable and a contact element is covered by a tube using a tubular mandrel. The cable has an insulation surrounding the conductor, which is surrounded by a screen. Above the screen is a metallic reinforcement, which is surrounded by an outer jacket. The hose is first applied to its mounting on the cable end at a great length on the mandrel. The mandrel is then broken in its central region and the broken end is pulled out of the tube. The thereby freed end of the tube is wound up and positioned as a roll over the end of the remaining mandrel. This part of the mandrel is then placed on the stripped conductor of the cable to the abutment against the beveled insulation of the conductor. Thereafter, the winding of the hose located on the mandrel is unwound until it covers the insulation of the conductor, the screen, the reinforcement and the jacket. The end remote from this end of the tube is then unwound from the mandrel and positioned as a wrap over the insulation of the conductor of the cable. The mandrel is then removed and a contact element is connected to the conductor. Finally, the on the insulation located winding of the hose unwound over the contact element.

Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Verfahren bereitzustellen, durch welches die metallische Verbindung Einzelleiter-Kontaktelement sicher gegen Feuchtigkeit und andere Medien abgedichtet werden kann.The invention has for its object to provide an improved method by which the metallic compound single-conductor contact element can be securely sealed against moisture and other media.

Diese Aufgabe wird entsprechend den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst.This object is achieved according to the characterizing features of claim 1.

Dieses Verfahren erlaubt das Abdichten der Verbindungsstelle zwischen einem elektrischen Leiter und einem an denselben angeschlossenen Kontaktelement in einfachen Arbeitsschritten, und zwar kostengünstig und in gut für Einzelleiter geeigneter Art und Weise. Durch die Elastizität des Schlauchstücks wird dieses unter Spannung durch seine elastischen Kräfte fest an die Isolierung des Leiters einerseits und das rohrförmige Kontaktelement andererseits angedrückt, um die Verbindungsstelle mediendicht abzudichten. Das Verfahren wird vorzugsweise vollautomatisch durchgeführt. Es eignet sich besonders für die serienmäßige Produktion. Dadurch kann mit besonderem Vorteil eine große Anzahl an Einzelleitern schnell und einfach mediendicht mit Kontaktelementen versehen werden.This method allows the sealing of the junction between an electrical conductor and a contact element connected to the same in simple steps, and cost and in a well-suited for single conductor manner. Due to the elasticity of the piece of hose this is pressed under tension by its elastic forces firmly to the insulation of the conductor on the one hand and the tubular contact element on the other hand to seal the connection point media-tight. The method is preferably carried out fully automatically. It is particularly suitable for serial production. As a result, it is particularly advantageous if a large number of individual conductors are provided with contact elements in a media-tight manner, quickly and easily.

Ausführungsbeispiele des Erfindungsgegenstandes sind in den Zeichnungen dargestellt.Embodiments of the subject invention are illustrated in the drawings.

Es zeigen:

  • Fig. 1 das Ende eines abisolierten elektrischen Leiters.
  • Fig. 2 Längs- und Querschnitte eines elektrischen Kontaktelements.
  • Fig. 3 einen Längsschnitt eines elastischen Schlauchstücks.
  • Fig. 4A und 4B, in Längsschnitten, ein mit dem Leiterende verbundenes Kontaktelement und ein aufgebrachtes Schlauchstück nach erfindungsgemäßen Verfahrensschritten.
  • Fig. 5 ein umgebogenes Schlauchstück im Längsschnitt.
Show it:
  • Fig. 1 the end of a stripped electrical conductor.
  • Fig. 2 Longitudinal and cross sections of an electrical contact element.
  • Fig. 3 a longitudinal section of an elastic hose piece.
  • FIGS. 4A and 4B in longitudinal sections, a contact element connected to the conductor end and an applied tube piece according to the method steps according to the invention.
  • Fig. 5 a bent piece of tubing in longitudinal section.

In den Fig. 1 bis 3 sind die Elemente schematisch dargestellt, welche mit dem Verfahren nach der Erfindung miteinander verbunden und zum Abdichten der Verbindungsstelle verwendet werden sollen. Fig. 1 zeigt einen elektrischen Leiter 1, der von einer Isolierung 2 umgeben ist. Der Leiter 1 ist beispielsweise ein massiver Leiter oder ein Litzenleiter und besteht vorzugsweise aus Aluminium. An seinem Ende ist der Leiter 1 von seiner Isolierung 2 befreit, um elektrisch mit einem Kontaktelement verbunden werden zu können.In the Fig. 1 to 3 the elements are shown schematically, which are connected to each other by the method according to the invention and used to seal the joint. Fig. 1 shows an electrical conductor 1, which is surrounded by an insulation 2. The conductor 1 is for example a solid conductor or a stranded conductor and is preferably made of aluminum. At its end, the conductor 1 is freed from its insulation 2 in order to be electrically connected to a contact element.

Ein elektrisches Kontaktelement 3 ist in Fig. 2 schematisch dargestellt. Das Kontaktelement 3 besteht vorzugsweise aus Kupfer oder aus einer Kupferlegierung und soll beispielsweise durch Crimpen oder Eindrücken mit dem Leiter 1 verbunden werden. Das Kontaktelement 3 hat an dem Ende 4, in welches das abisolierte Leiterende gesteckt werden soll, einen rohrförmigen Querschnitt 5. Es ist ebenfalls möglich, das Kontaktelement 3 mit dem Leiterende zu verschweißen. Das andere, flache Ende 7 des Kontaktelements 3 wird mit weiterführenden elektrischen Leitern verbunden, wofür das flache Ende 7 beispielsweise ein Loch 6 aufweisen kann.An electrical contact element 3 is in Fig. 2 shown schematically. The contact element 3 is preferably made of copper or a copper alloy and is to be connected for example by crimping or pressing with the conductor 1. The contact element 3 has at the end 4, in which the stripped conductor end is to be inserted, a tubular cross-section 5. It is also possible to weld the contact element 3 to the conductor end. The other, flat end 7 of the contact element 3 is connected to further electrical conductors, for which the flat end 7 may have a hole 6, for example.

Ein bei dem Verfahren verwendetes Schlauchstück ist in Fig. 3 in bevorzugter Ausführungsform gezeigt. Das Schlauchstück 8 besteht aus einem dauerelastischen Isoliermaterial, beispielsweise aus Neopren der Firma DuPont. Das Schlauchstück 8 hat einen rohrförmigen Querschnitt. Außerdem kann es eine oder mehrere um den inneren Umfang liegende Rippen 12 aufweisen. Diese bewirken einen noch festeren Sitz des Schlauchstücks 8 auf der Isolierung 2 des Leiters 1, da sie geringfügig in die Oberfläche der Isolierung 2 eingedrückt werden.A piece of tubing used in the method is shown in FIG Fig. 3 shown in a preferred embodiment. The hose piece 8 consists of a permanently elastic insulating material, for example, neoprene from DuPont. The hose piece 8 has a tubular cross-section. In addition, it may have one or more circumferentially disposed ribs 12. These cause an even firmer fit of the tube piece 8 on the insulation 2 of the conductor 1, since they are slightly pressed into the surface of the insulation 2.

Zur Durchführung des erfindungsgemäßen Verfahrens wird zunächst der Leiter 1 an seinem Ende abisoliert. Anschließend wird das elastische Schlauchstück 8 so auf die Isolierung 2 des Leiters 1 aufgebracht, daß ein erstes Ende 9 des Schlauchstücks 8 fest auf der Isolierung 2 aufliegt, wobei ein zweites Ende 10 des Schlauchstücks 8 bis über das erste Ende 9 umgebogen ist. Dies ist in Fig. 4A schematisch dargestellt. Das Kontaktelement 3 wird dann auf das abisolierte Leiterende aufgesteckt und elektrisch leitend mit diesem verbunden. Wie ebenfalls in Fig. 4A angedeutet, ist der rohrförmige Querschnitt des Kontaktelements 3 in seinem mittleren Bereich eingedrückt, um fest am abisolierten Leiterende anzuliegen und stoff- und/oder kraftschlüssig mit diesem verbunden zu sein. Das Kontaktelement 3 wird so mit dem Leiter 1 verbunden, daß seine kreiszylindrische äußere Oberfläche in dem an die Isolierung 2 des Leiters 1 angrenzenden Bereich beibehalten wird. Abschließend wird das umgebogene zweite Ende 10 des Schlauchstücks 8 bis über das Kontaktelement 3 unter fester Anlage an demselben zurückgebogen. Wie aus Fig. 4B ersichtlich, erstreckt sich das Schlauchstück 8 über einen Teil der Isolierung 2 des Leiters 1 sowie über das erste, rohrförmige Ende 4 des Kontaktelements 3.To carry out the method according to the invention, first the conductor 1 is stripped off at its end. Subsequently, the elastic piece of hose 8 is applied to the insulation 2 of the conductor 1 that a first end 9 of the hose piece 8 rests firmly on the insulation 2, wherein a second end 10 of the hose piece 8 is bent over the first end 9. This is in Fig. 4A shown schematically. The contact element 3 is then plugged onto the stripped conductor end and electrically conductively connected thereto. Like also in Fig. 4A indicated, the tubular cross-section of the contact element 3 is pressed in its central region to abut firmly on the stripped conductor end and to be materially and / or non-positively connected thereto. The contact element 3 is connected to the conductor 1 so that its circular-cylindrical outer surface is maintained in the region adjacent to the insulation 2 of the conductor 1. Finally, the bent-over second end 10 of the hose piece 8 is bent back over the contact element 3 under firm contact therewith. How out Fig. 4B can be seen, the hose piece 8 extends over a portion of the insulation 2 of the conductor 1 and over the first, tubular end 4 of the contact element. 3

Zum Aufbringen des Schlauchstücks 8 auf die Isolierung 2 des Leiters 1 wird zunächst das zweite Ende 10 des Schlauchstücks 8 umgebogen, wie in Fig. 5 dargestellt. Das Schlauchstück 8 wird dann in umgebogener Form mechanisch, pneumatisch oder hydraulisch aufgeweitet, um es auf die Isolierung 2 des Leiters 1 aufbringen zu können. Nach der Entlastung des Schlauchstücks 8 wird dasselbe in gewünschter Position dank seiner elastischen Kräfte fest an die Isolierung 2 des Leiters 1 und nach dem Zurückbiegen des umgebogenen Endes auch an das Kontaktelement 3 gedrückt. Dabei wird die Verbindungsstelle zwischen Leiter 1 und Kontaktelement 3 und insbesondere der eventuell vorhandene Spalt 13 (s. Fig. 4B) zwischen dem Kontaktelement 3 und der Isolierung 2 des Leiters 1 vollständig mediendicht abgedichtet.For applying the tube piece 8 to the insulation 2 of the conductor 1, the second end 10 of the tube piece 8 is first bent, as in Fig. 5 shown. The tube piece 8 is then expanded in a bent form mechanically, pneumatically or hydraulically in order to be able to apply it to the insulation 2 of the conductor 1. After the discharge of the hose piece 8 the same is pressed in the desired position thanks to its elastic forces firmly to the insulation 2 of the conductor 1 and after the bending back of the bent end and the contact element 3. In this case, the connection point between the conductor 1 and contact element 3 and in particular the possibly existing gap 13 (s. Fig. 4B ) is sealed completely media-tight between the contact element 3 and the insulation 2 of the conductor 1.

Claims (4)

  1. A method for sealing the connecting point between an electrical conductor (1) surrounded by insulation (2) and a tubular electrical contact element (3) connected with the conductor (1), with which initially the conductor (1) is released at its end from the insulation (2) and then the contact element (3) is attached to the conductor (1) and is connected electro-conductively with the same, characterized in
    - that before the attachment of the contact element (3) to the conductor (1) initially a piece of tube (8) made of permanently elastic insulating material in a form, in which its second end (10) up to its first end (9) is bent, is applied with its first end (9) firmly attached to the insulation (2) of the conductor (1),
    - that then the tubular electrical contact element (3) while retaining its tube form with a circular cylindrical surface is attached to the conductor (1) and in the area adjacent to the insulation (2) of the conductor (1) is electro-conductively connected with the same and
    - that finally the bent second end (10) of the piece of tube (8) under media-tight sealing of the connecting point between the insulation (2) of the conductor (1) and the contact element (3) is bent back until over the contact element (3) firmly attached to the same.
  2. A method according to Claim 1, characterized in that the tube piece (8) is mechanically widened before the application to the insulated conductor (1).
  3. A method according to Claim 1, characterized in that the tube piece (8) is pneumatically widened before the application to the insulated conductor (1).
  4. A method according to Claim 1, characterized in that the tube piece (8) is hydraulically widened before the application to the insulated conductor (1).
EP13306568.0A 2013-11-15 2013-11-15 Method for sealing a joint between a conductor and a contact element Active EP2874234B1 (en)

Priority Applications (1)

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EP13306568.0A EP2874234B1 (en) 2013-11-15 2013-11-15 Method for sealing a joint between a conductor and a contact element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13306568.0A EP2874234B1 (en) 2013-11-15 2013-11-15 Method for sealing a joint between a conductor and a contact element

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EP2874234B1 true EP2874234B1 (en) 2016-09-14

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Publication number Priority date Publication date Assignee Title
DE102016119656A1 (en) * 2016-10-14 2018-05-03 Bremi Fahrzeug-Elektrik Gmbh + Co. Kg Method for producing a cable lug and cable lug for electrically connecting a cable to a current-carrying element

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770876A (en) * 1972-05-08 1973-11-06 Goodyear Tire & Rubber Elastic cover and method of applying said cover
FR2503476B1 (en) * 1981-04-01 1986-05-02 Fabrication Cables Elect Cie G METHOD FOR DEPOSITING A PROTECTIVE SHEATH ON THE END OF AN ELECTRIC CABLE AND DEVICE FOR IMPLEMENTING SAME
JPH01283778A (en) * 1988-05-11 1989-11-15 Toshin Denki Kk Electric wire connecting tool
DE10316603B3 (en) * 2003-04-11 2004-11-04 Harting Automotive Gmbh & Co. Kg Water-tight crimp connection between tubular cable shoe and electrical filament cable has cable insulation fitted over bead at tubular terminal end of cable shoe
JP5621471B2 (en) * 2010-09-28 2014-11-12 住友電装株式会社 Electric wire with terminal, manufacturing method of electric wire with terminal and anticorrosive member

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