EP3358678A1 - Seal for a crimped contact - Google Patents

Seal for a crimped contact Download PDF

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Publication number
EP3358678A1
EP3358678A1 EP17305139.2A EP17305139A EP3358678A1 EP 3358678 A1 EP3358678 A1 EP 3358678A1 EP 17305139 A EP17305139 A EP 17305139A EP 3358678 A1 EP3358678 A1 EP 3358678A1
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EP
European Patent Office
Prior art keywords
sealing
conductor
sleeve
insulation
crimping
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
EP17305139.2A
Other languages
German (de)
French (fr)
Other versions
EP3358678B1 (en
Inventor
Gerhard Lindner
Christian Wittmann
Hermann Teicher
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.)
Nexans SA
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Nexans SA
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Publication date
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Priority to EP17305139.2A priority Critical patent/EP3358678B1/en
Publication of EP3358678A1 publication Critical patent/EP3358678A1/en
Application granted granted Critical
Publication of EP3358678B1 publication Critical patent/EP3358678B1/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
    • H01R4/184—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 comprising a U-shaped wire-receiving portion
    • H01R4/185—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 comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • 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

Definitions

  • the invention relates to an arrangement for sealing an electrically conductive connection between an electrical conductor surrounded by an insulation and a crimp having electrical contact element, in which at a freed from the insulation end of the conductor, the electrical contact element is fixed by crimping, and on a method for producing such an arrangement.
  • electrical conductors such as stranded conductors
  • contact elements made of electrically conductive material used. Electrical connections must be made between the voltage source, such as a battery, and actuators, sensors, controls, etc.
  • the voltage source such as a battery
  • 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 conductor and the contact element are non-positively and / or materially connected to each other.
  • connection point around the end of the insulation and the contact element must therefore be sealed medium-tight.
  • a shrink tube is often placed around the joint, as for example in the DE 33 19880 A1 is described.
  • the shrink tube is provided on its inside, for example, with a hot melt adhesive and then contracts by heating around the junction together.
  • shrink tubing and adhesive are not optimally resistant to strong temperature fluctuations, which may be exposed to the conductors and contact elements.
  • the shrink tube method also has the disadvantage that it is relatively time-consuming and costly, since the sealing of the joint initially the shrink tube with the adhesive are applied and then a heating step must take place. The heating can also cause the problem that the adhesive runs and gets into areas that are outside the shrink tube.
  • the invention has for its object to make the above-described arrangement and the method for their preparation so that a perfect seal of the crimping exists, which can be produced in a few simple steps.
  • an initially flowable and subsequently solidified sealing material is advantageously applied to the area around the crimp contact.
  • the V-shaped joint which is produced during crimping in the crimp area, is completely filled by the sealing material.
  • the crimping area forms a homogeneous, smooth, cylindrical sealing surface.
  • an elastic sealing sleeve is fixed on the sealing surface. The sealing sleeve extends beyond the insulation at the end of the conductor. Due to the solidified sealing material, a homogeneous sealing surface is available for the sealing sleeve, on which the sealing sleeve bears against the media all around under tension, without enclosing air chambers or free spaces, for example.
  • the arrangement according to the invention may additionally comprise a second crimping sleeve.
  • This second crimp sleeve can additionally be crimped around the sealing sleeve. By the second crimp sleeve of the contact pressure in the sealing area is further increased.
  • the flowable sealing material is preferably an adhesive. This can be applied in a flowable state to the crimp and then solidified by curing.
  • the object of the invention is further achieved by a method for sealing such an electrically conductive connection.
  • a flowable sealing material is applied and solidified, so that a homogeneous, cylindrical surface is formed.
  • An elastic sealing sleeve is then pushed onto the cylindrical surface, so that the sealing sleeve extends over the cylindrical surface and the insulation of the conductor.
  • the method according to the invention can advantageously be carried out in a few simple processing steps.
  • the contact element and the seal can be mounted during the cutting or abutting of the electrical conductor.
  • the sealing material is applied in a defined amount.
  • the sealing sleeve has a length which is just sufficient to cover the crimping area and a small part of the insulation at the conductor end.
  • the arrangement 1 according to the invention will be described with reference to FIGS Fig. 1 and 2 explained with reference to a cable lug 6 and a stranded conductor 2.
  • the arrangement may also comprise other types of electrical conductors, for example single conductors or cables with shielding, such as coaxial cables, or optical waveguides.
  • the stranded conductor 2 consists of a plurality of individual electrical conductors 3 and is surrounded by an insulation 4.
  • the individual conductors 3 are made of, for example, aluminum or an alloy containing the same.
  • the insulation consists for example of silicone or polyvinyl chloride.
  • the stranded conductor 2 is stripped at its end 5.
  • the cable lug 6 is crimped to the end of the stranded conductor 2.
  • the crimps 8, 9 are crimped around the electrical conductors 3, while the crimp ring 10 is crimped around the end of the conductor insulation 4.
  • the crimp ring 10 thus provides a strain relief and a bend protection of the electrical conductor 3.
  • the cable lug 6 is made for example of copper.
  • the crimping area resulting from the crimping is provided with a sealing material 7.
  • the sealing material is applied in a flowable state, then solidifying material.
  • the sealing material 7 is located mainly in the region in which the two crimp wings 8, 9 of the cable lug 6 in the crimped state form an approximately V-shaped joint. The joint is completely filled by the sealing material 7.
  • the sealing material 7 may also be applied at other locations or around the entire circumference of the crimping area, if necessary, to obtain the tubular smooth surface.
  • the sealing material 7 is advantageously an adhesive. This may be, for example, a hot melt adhesive, an ultraviolet (UV) light curing adhesive, or a two-component adhesive. This is applied in the desired quantity to the crimp area in the flowable state.
  • the sealing material may also be another first flowable and then curing material, for example epoxy or silicone.
  • the tubular crimping area is provided with an elastic sealing sleeve 10.
  • the sealing sleeve 11 covers the entire crimping area beyond the insulation 4 of the electrical conductor 2.
  • the elastic sealing sleeve 11 thus provides for the sealing between the line insulation 4 and the crimping region of the contact element 6.
  • the sealing sleeve 11 has a tubular shape 11.
  • the elastic material is for example silicone.
  • the sealing sleeve 11 is dimensioned such that it rests under tension on the crimping area.
  • the sealing sleeve 11 may have sealing lips, which are arranged around their inner diameter (not shown). By the sealing lips, the contact force and the maintenance of the sealing sleeve 11 can be further increased on the crimping.
  • an additional crimp sleeve 12 is further shown.
  • This crimping sleeve 12 is crimped around the sealing sleeve 11.
  • the additional crimp barrel 12 has an interrupted ring shape, wherein the interruption after crimping is closed or almost closed.
  • the additional crimping sleeve 12 and the sealing sleeve 11 may form a one-piece element, in which the crimping sleeve is integrated into the sealing sleeve.
  • the crimp sleeve 12 may be embedded in the plastic material of the sealing sleeve.
  • the additional crimp sleeve 12 is advantageously made of metal.
  • the inventive method for producing the above-described arrangement for sealing the connection between the contact element and the electrical conductor can be carried out, for example, as follows.
  • the sealing sleeve 11 is pushed onto the insulated conductor 2.
  • the end 5 of the electrical conductor 2 is stripped and then connected by crimping frictionally with the cable lug 6.
  • the flowable sealing material for example an adhesive, is then applied to the crimp area and in particular into the V-shaped joint which has been formed by the crimping.
  • the sealing material is metered to apply only the amount necessary to provide a tubular smooth surface around the crimping area when the sealing material is cured.
  • the sealing sleeve 11 is pushed onto the thus smoothed crimp area, so that the sealing sleeve 11 covers the entire crimping area beyond the conductor insulation.
  • the hardening or hardening of the sealing material can be done by air drying, UV light or cooling before or during the assembly of the sealing sleeve 11.
  • the additional crimp sleeve 12 can then be crimped around the sealing sleeve 11.
  • the additional crimp sleeve 12 can be pushed onto the sealing sleeve 11 after completion of the above-mentioned steps and on this be crimped.
  • the crimp sleeve 12 can be brought together with the sealing sleeve 11 on the connection point, for example, when the crimp sleeve 12 is already integrated into the sealing sleeve.

Abstract

Es wird eine Anordnung (1) zur Abdichtung einer elektrisch leitenden Verbindung zwischen einem von einer Isolierung (4) umgebenen elektrischen Leiter (2) und einem einen Crimp aufweisenden elektrischen Kontaktelement (6) angegeben. An einem von der Isolierung (4) befreiten Ende des Leiters (2) ist das elektrische Kontaktelement (6) durch Crimpen befestigt. Um den Crimpbereich besteht eine homogene, zylinderförmige Fläche mittels eines verfestigten, im fließfähigen Zustand aufgebrachten Dichtmaterials (7). Auf der zylinderförmigen Fläche ist eine elastische Dichthülse (11) festgelegt, welche sich bis über die Isolierung (4) des Leiters erstreckt.

Figure imgaf001
The invention relates to an arrangement (1) for sealing an electrically conductive connection between an electrical conductor (2) surrounded by an insulation (4) and an electrical contact element (6) having a crimp. At one of the insulation (4) freed end of the conductor (2), the electrical contact element (6) is fixed by crimping. There is a homogeneous, cylindrical surface around the crimping area by means of a solidified sealing material (7) applied in the flowable state. On the cylindrical surface, an elastic sealing sleeve (11) is fixed, which extends over the insulation (4) of the conductor.
Figure imgaf001

Description

Die Erfindung bezieht sich auf eine Anordnung zur Abdichtung einer elektrisch leitenden Verbindung zwischen einem von einer Isolierung umgebenen elektrischen Leiter und einem einen Crimp aufweisenden elektrischen Kontaktelement, bei welcher an einem von der Isolierung befreiten Ende des Leiters das elektrische Kontaktelement durch Crimpen befestigt ist, sowie auf ein Verfahren zur Herstellung einer solchen Anordnung.The invention relates to an arrangement for sealing an electrically conductive connection between an electrical conductor surrounded by an insulation and a crimp having electrical contact element, in which at a freed from the insulation end of the conductor, the electrical contact element is fixed by crimping, and on a method for producing such an arrangement.

Insbesondere in der Automobilelektronik kommt eine Vielzahl von elektrischen Leitern, beispielsweise Litzenleitern, und mit diesen verbundenen Kontaktelementen aus elektrisch leitendem Material zum Einsatz. Elektrische Verbindungen müssen zwischen der Spannungsquelle, beispielsweise einer Batterie, und Aktuatoren, Sensoren, Steuerelementen usw. hergestellt werden. 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 Leiter und das Kontaktelement werden dabei kraft- und/oder stoffschlüssig miteinander verbunden.In particular, in the automotive electronics is a variety of electrical conductors, such as stranded conductors, and connected to these contact elements made of electrically conductive material used. Electrical connections must be made between the voltage source, such as a battery, and actuators, sensors, controls, etc. For example, in vehicles with electric drive or hybrid drive, there is 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 conductor and the contact element are 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. Dadurch können beispielsweise Sauerstoff oder Feuchtigkeit an den Leiter gelangen und zu Korrosion an demselben führen. Ebenso kann es bei Feuchtigkeitseinwirkung zu Kontaktkorrosion kommen, wenn Kontaktelement und Leiter aus unterschiedlichen Metallen (beispielsweise Aluminium und Kupfer) bestehen. 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 durch den Spalt zwischen dem Leiter und der Isolierung aufgrund von Kapillarwirkung in Leitungsrichtung vordringt.At the junction between the conductor insulation and the contact element connected to the stripped conductor end, there may be a gap caused, inter alia, by the crimping process, through which the metallic connection of the conductor contact element lies open. As a result, for example, oxygen or moisture can reach the conductor and lead to corrosion on the same. Likewise, contact with moisture may occur if the contact element and conductor consist of different metals (for example aluminum and copper). Corrosion results in increased contact resistance between the conductor and the contact element and can increase the strength of the metallic connection affect. Furthermore, it is possible that moisture penetrates through the gap between the conductor and the insulation due to capillary action in the line direction.

Die Verbindungsstelle um das Ende der Isolierung und das Kontaktelement muss deshalb mediendicht abgedichtet werden.The connection point around the end of the insulation and the contact element must therefore be sealed medium-tight.

Insbesondere bei gecrimpten Kabelschuhen wird oft ein Schrumpfschlauch um die Verbindungsstelle gebracht, wie es beispielsweise in der DE 33 19880 A1 beschrieben ist. Der Schrumpfschlauch wird dabei an seiner Innenseite beispielsweise mit einem Heißklebstoff versehen und zieht sich anschließend durch Erhitzen um die Verbindungsstelle zusammen.Especially with crimped cable lugs, a shrink tube is often placed around the joint, as for example in the DE 33 19880 A1 is described. The shrink tube is provided on its inside, for example, with a hot melt adhesive and then contracts by heating around the junction together.

Die Materialverbindung von Schrumpfschlauch und Klebstoff ist jedoch gegenüber starken Temperaturschwankungen, denen die Leiter und Kontaktelemente ausgesetzt sein können, nicht optimal beständig. Das Schrumpfschlauchverfahren hat außerdem den Nachteil, daß es relativ zeitaufwendig und kostspielig, da die für die Abdichtung der Verbindungsstelle zunächst der Schrumpfschlauch mit dem Klebstoff aufgebracht werden und anschließend ein Erhitzungsschritt stattfinden muß. Durch das Erhitzen kann außerdem das Problem entstehen, daß der Klebstoff verläuft und in Bereiche gerät, die sich außerhalb des Schrumpfschlauchs befinden.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. The shrink tube method also has the disadvantage that it is relatively time-consuming and costly, since the sealing of the joint initially the shrink tube with the adhesive are applied and then a heating step must take place. The heating can also cause the problem that the adhesive runs and gets into areas that are outside the shrink tube.

Der Erfindung liegt die Aufgabe zugrunde, die oben geschilderte Anordnung und das Verfahren zu deren Herstellung so zu gestalten, daß eine einwandfreie Abdichtung des Crimpbereichs besteht, welche in wenigen einfachen Arbeitsschritten hergestellt werden kann.The invention has for its object to make the above-described arrangement and the method for their preparation so that a perfect seal of the crimping exists, which can be produced in a few simple steps.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß

  • um den Crimpbereich eine homogene, zylinderförmige Fläche mittels eines verfestigten, im fließfähigen Zustand aufgebrachten Dichtmaterials besteht, und
  • auf der zylinderförmigen Fläche eine elastische Dichthülse festgelegt ist, welche sich bis über die Isolierung des Leiters erstreckt.
This object is achieved according to the invention in that
  • around the crimp a homogeneous, cylindrical surface by means of a solidified, applied in the flowable state sealing material, and
  • on the cylindrical surface an elastic sealing sleeve is fixed, which extends beyond the insulation of the conductor.

Bei der erfindungsgemäßen Anordnung ist mit Vorteil auf dem Bereich um den Crimpkontakt ein zunächst fließfähiges und anschließend verfestigtes Dichtmaterial aufgebracht. Insbesondere die V-förmige Fuge, die beim Crimpen im Crimpbereich entsteht, ist von dem Dichtmaterial vollständig ausgefüllt. Mit dem verfestigten Dichtmaterial bildet der Crimpbereich eine homogene, glatte, zylinderförmige Dichtfläche. Auf der Dichtfläche ist eine elastische Dichthülse festgelegt. Die Dichthülse erstreckt sich bis über die Isolierung am Leiterende. Durch das verfestigte Dichtmaterial steht für die Dichthülse eine homogene Dichtfläche zur Verfügung, auf welcher die Dichthülse unter Spannung rundum mediendicht anliegt, ohne beispielsweise Luftkammern oder Freiräume einzuschließen.In the arrangement according to the invention, an initially flowable and subsequently solidified sealing material is advantageously applied to the area around the crimp contact. In particular, the V-shaped joint, which is produced during crimping in the crimp area, is completely filled by the sealing material. With the solidified sealing material, the crimping area forms a homogeneous, smooth, cylindrical sealing surface. On the sealing surface an elastic sealing sleeve is fixed. The sealing sleeve extends beyond the insulation at the end of the conductor. Due to the solidified sealing material, a homogeneous sealing surface is available for the sealing sleeve, on which the sealing sleeve bears against the media all around under tension, without enclosing air chambers or free spaces, for example.

Nach einer besonders bevorzugten Ausführungsform kann die erfindungsgemäße Anordung zusätzlich eine zweite Crimphülse aufweisen. Diese zweite Crimphülse kann zusätzlich um die Dichthülse gecrimpt sein. Durch die zweite Crimphülse wird der Anpressdruck im Dichtbereich weiter erhöht.According to a particularly preferred embodiment, the arrangement according to the invention may additionally comprise a second crimping sleeve. This second crimp sleeve can additionally be crimped around the sealing sleeve. By the second crimp sleeve of the contact pressure in the sealing area is further increased.

Das fließfähige Dichtmaterial ist vorzugsweise ein Klebstoff. Dieser kann in fließfähigem Zustand um den Crimpbereich aufgetragen und anschliessend durch Aushärten verfestigt werden.The flowable sealing material is preferably an adhesive. This can be applied in a flowable state to the crimp and then solidified by curing.

Die Aufgabe der Erfindung wird weiterhin durch ein Verfahren zur Abdichtung einer solchen elektrisch leitenden Verbindung gelöst. Um den Crimpbereich wird ein fließfähiges Dichtmaterial aufgetragen und verfestigt, sodaß eine homogene, zylinderförmige Fläche entsteht. Eine elastische Dichthülse wird anschließend auf die zylinderförmige Fläche aufgeschoben, sodaß sich die Dichthülse über die zylinderförmige Fläche und die Isolierung des Leiters erstreckt.The object of the invention is further achieved by a method for sealing such an electrically conductive connection. Around the crimp area, a flowable sealing material is applied and solidified, so that a homogeneous, cylindrical surface is formed. An elastic sealing sleeve is then pushed onto the cylindrical surface, so that the sealing sleeve extends over the cylindrical surface and the insulation of the conductor.

Das erfindungsgemäße Verfahren ist mit Vorteil in wenigen einfachen Bearbeitungsschritten durchführbar. Insbesondere können das Kontaktelement und die Abdichtung während des Ablängens oder Anschlagens des elektrischen Leiters montiert werden. Das Dichtmaterial wird in einer definierten Menge aufgetragen. Somit besteht nicht das Risiko, daß Dichtmaterial außerhalb der gewünschten Bereiche fließt. Es ist ebenfalls kein separater, späterer Prozeßschritt zum Verfestigen des Dichtmaterials notwendig. Die Dichthülse hat eine Länge, welche gerade ausreichend ist, um den Crimpbereich und einen kleinen Teil der Isolierung am Leiterende abzudecken.The method according to the invention can advantageously be carried out in a few simple processing steps. In particular, the contact element and the seal can be mounted during the cutting or abutting of the electrical conductor. The sealing material is applied in a defined amount. Thus, there is no risk that sealing material outside the desired areas flows. It is also not necessary a separate, later process step for solidifying the sealing material. The sealing sleeve has a length which is just sufficient to cover the crimping area and a small part of the insulation at the conductor end.

Ausführungsbeispiele des Erfindungsgegenstandes sind in den Zeichnungen dargestellt. Es zeigen:

  • Fig. 1 eine erfindungsgemässe Anordnung zur Abdichtung der Verbindungsstelle zwischen einem abisolierten Leiterende und einem Kabelschuh, und
  • Fig. 2 die Einzelelemente der Anordnung nach Fig. 1.
Embodiments of the subject invention are illustrated in the drawings. Show it:
  • Fig. 1 an inventive arrangement for sealing the connection point between a stripped conductor end and a cable lug, and
  • Fig. 2 the individual elements of the arrangement Fig. 1 ,

In den Zeichnungen beziehen sich gleiche Bezugszeichen auf gleiche technische Merkmale.In the drawings, like reference numerals refer to like technical features.

Die erfindungsgemäße Anordnung 1 wird mit Bezug auf die Fig. 1 und 2 anhand eines Kabelschuhs 6 und eines Litzenleiters 2 erläutert. Die Anordnung kann allerdings auch andere Arten von elektrischen Leitern, beispielsweise Einzelleiter oder Leitungen mit Schirmung, wie Koaxialleitungen, oder Lichtwellenleiter aufweisen.The arrangement 1 according to the invention will be described with reference to FIGS Fig. 1 and 2 explained with reference to a cable lug 6 and a stranded conductor 2. However, the arrangement may also comprise other types of electrical conductors, for example single conductors or cables with shielding, such as coaxial cables, or optical waveguides.

Der Litzenleiter 2 besteht aus einer Vielzahl von elektrischen Einzelleitern 3 und ist von einer Isolierung 4 umgeben. Die Einzelleiter 3 bestehen beispielsweise aus Aluminium oder einer dasselbe enthaltenden Legierung. Die Isolierung besteht beispielsweise aus Silikon oder Polyvinylchlorid. Der Litzenleiter 2 ist an seinem Ende 5 abisoliert.The stranded conductor 2 consists of a plurality of individual electrical conductors 3 and is surrounded by an insulation 4. The individual conductors 3 are made of, for example, aluminum or an alloy containing the same. The insulation consists for example of silicone or polyvinyl chloride. The stranded conductor 2 is stripped at its end 5.

Der Kabelschuh 6 ist an das Ende des Litzenleiters 2 angecrimpt. Die Crimpflügel 8, 9 sind um die elektrischen Leiter 3 gecrimpt, während der Crimpring 10 um das Ende der Leiterisolierung 4 gecrimpt ist. Der Crimpring 10 sorgt somit für eine Zugentlastung und einen Knickschutz der elektrischen Leiter 3. Der Kabelschuh 6 besteht beispielsweise aus Kupfer. Der durch das Crimpen entstandene Crimpbereich ist mit einem Dichtmaterial 7 versehen. Das Dichtmaterial ist ein in fließfähigem Zustand aufgebrachtes, sich anschließend verfestigendes Material. In dem dargestellten Beispiel befindet sich das Dichtmaterial 7 hauptsächlich in dem Bereich, in welchem die beiden Crimpflügel 8, 9 des Kabelschuhs 6 in gecrimptem Zustand eine etwa V-förmige Fuge bilden. Die Fuge wird von dem Dichtmaterial 7 vollständig ausgefüllt. Dadurch entsteht eine zylinder- oder rohrförmige, rundum glatte und homogene Fläche um den Crimpbereich. Gleichzeitig wird der Crimpbereich durch das Dichtmaterial abgedichtet. Das Dichtmaterial 7 kann auch an anderen Stellen oder um den gesamten Umfang des Crimpbereichs herum aufgetragen sein, falls dies erforderlich ist, um die rohrförmige glatte Fläche zu erhalten.The cable lug 6 is crimped to the end of the stranded conductor 2. The crimps 8, 9 are crimped around the electrical conductors 3, while the crimp ring 10 is crimped around the end of the conductor insulation 4. The crimp ring 10 thus provides a strain relief and a bend protection of the electrical conductor 3. The cable lug 6 is made for example of copper. The crimping area resulting from the crimping is provided with a sealing material 7. The sealing material is applied in a flowable state, then solidifying material. In the illustrated example, the sealing material 7 is located mainly in the region in which the two crimp wings 8, 9 of the cable lug 6 in the crimped state form an approximately V-shaped joint. The joint is completely filled by the sealing material 7. This creates a cylindrical or tubular, completely smooth and homogeneous surface around the crimping area. At the same time, the crimping area is sealed by the sealing material. The sealing material 7 may also be applied at other locations or around the entire circumference of the crimping area, if necessary, to obtain the tubular smooth surface.

Das Dichtmaterial 7 ist mit Vorteil ein Klebstoff. Dies kann beispielsweise ein Heißklebstoff, ein durch ultraviolettes (UV) Licht härtender Klebstoff oder ein Zweikomponentenklebstoff sein. Dieser wird im fließfähigen Zustand in der gewünschten Menge auf den Crimpbereich aufgetragen. Das Dichtmaterial kann auch ein anderes zunächst fließfähiges und anschließend aushärtendes Material sein, beispielsweise Epoxidharz oder Silikon.The sealing material 7 is advantageously an adhesive. This may be, for example, a hot melt adhesive, an ultraviolet (UV) light curing adhesive, or a two-component adhesive. This is applied in the desired quantity to the crimp area in the flowable state. The sealing material may also be another first flowable and then curing material, for example epoxy or silicone.

Der rohrförmige Crimpbereich ist mit einer elastischen Dichthülse 10 versehen. Die Dichthülse 11 deckt den gesamten Crimpbereich bis über die Isolierung 4 des elektrischen Leiters 2 ab. Die elastische Dichthülse 11 sorgt somit für die Abdichtung zwischen der Leitungsisolierung 4 und dem Crimpbereich des Kontaktelements 6. Die Dichthülse 11 hat eine rohrartige Form 11. Das elastische Material ist beispielsweise Silikon. Die Dichthülse 11 ist derart dimensioniert, daß sie unter Spannung an dem Crimpbereich anliegt. Weiterhin kann die Dichthülse 11 Dichtlippen aufweisen, die um ihren Innendurchmesser angeordnet sind (nicht dargestellt). Durch die Dichtlippen können die Anlagekraft und der Halt der Dichthülse 11 auf dem Crimpbereich weiter erhöht werden.The tubular crimping area is provided with an elastic sealing sleeve 10. The sealing sleeve 11 covers the entire crimping area beyond the insulation 4 of the electrical conductor 2. The elastic sealing sleeve 11 thus provides for the sealing between the line insulation 4 and the crimping region of the contact element 6. The sealing sleeve 11 has a tubular shape 11. The elastic material is for example silicone. The sealing sleeve 11 is dimensioned such that it rests under tension on the crimping area. Furthermore, the sealing sleeve 11 may have sealing lips, which are arranged around their inner diameter (not shown). By the sealing lips, the contact force and the maintenance of the sealing sleeve 11 can be further increased on the crimping.

In dem dargestellten Ausführungsbeispiel ist weiterhin eine zusätzliche Crimphülse 12 gezeigt. Diese Crimphülse 12 ist um die Dichthülse 11 gecrimpt. Dadurch wird die Anlagekraft der Dichthülse 11 auf dem Crimpbereich zwischen Kontaktelement und elektrischem Leiter weiter erhöht und die Dichthülse besser auf ihrer gewünschten Position festzulegen. Die Verbindung ist dadurch besonders mechanisch robust. Die zusätzliche Crimphülse 12 hat eine unterbrochene Ringform, wobei die Unterbrechung nach dem Crimpen geschlossen bzw. nahezu geschlossen ist. Nach einer Variante können die zusätzliche Crimphülse 12 und die Dichthülse 11 ein einteiliges Element bilden, bei welchem die Crimphülse in die Dichthülse integriert ist. Beispielsweise kann die Crimphülse 12 in das Kunststoffmaterial der Dichthülse eingebettet sein. Die zusätzliche Crimphülse 12 besteht mit Vorteil aus Metall.In the illustrated embodiment, an additional crimp sleeve 12 is further shown. This crimping sleeve 12 is crimped around the sealing sleeve 11. As a result, the contact force of the sealing sleeve 11 is further increased on the crimp between contact element and electrical conductor and better secure the sealing sleeve in its desired position. The connection is therefore particularly mechanically robust. The additional crimp barrel 12 has an interrupted ring shape, wherein the interruption after crimping is closed or almost closed. According to a variant, the additional crimping sleeve 12 and the sealing sleeve 11 may form a one-piece element, in which the crimping sleeve is integrated into the sealing sleeve. For example, the crimp sleeve 12 may be embedded in the plastic material of the sealing sleeve. The additional crimp sleeve 12 is advantageously made of metal.

Das erfindungsgemäße Verfahren zur Herstellung der oben dargestellten Anordnung zur Abdichtung der Verbindung zwischen dem Kontaktelement und dem elektrischen Leiter kann beispielsweise wie folgt durchgeführt werden.The inventive method for producing the above-described arrangement for sealing the connection between the contact element and the electrical conductor can be carried out, for example, as follows.

Zunächst wird die Dichthülse 11 auf den isolierten Leiter 2 aufgeschoben. Das Ende 5 des elektrischen Leiters 2 wird abisoliert und dann durch Crimpen kraftschlüssig mit dem Kabelschuh 6 verbunden. Auf den Crimpbereich und insbesondere in die V-förmige Fuge, die durch das Crimpen entstanden ist, wird anschließend das fließfähige Dichtmaterial, beispielsweise ein Klebstoff, aufgetragen. Das Dichtmaterial wird so dosiert, daß nur die Menge aufgetragen wird, die notwendig ist, um eine rohrförmige, glatte Fläche um den Crimpbereich zu schaffen, wenn das Dichtmaterial ausgehärtet bzw. verfestigt ist. Abschließend wird die Dichthülse 11 auf den so geglätteten Crimpbereich geschoben, so daß die Dichthülse 11 den gesamten Crimpbereich bis über die Leiterisolierung abdeckt.First, the sealing sleeve 11 is pushed onto the insulated conductor 2. The end 5 of the electrical conductor 2 is stripped and then connected by crimping frictionally with the cable lug 6. The flowable sealing material, for example an adhesive, is then applied to the crimp area and in particular into the V-shaped joint which has been formed by the crimping. The sealing material is metered to apply only the amount necessary to provide a tubular smooth surface around the crimping area when the sealing material is cured. Finally, the sealing sleeve 11 is pushed onto the thus smoothed crimp area, so that the sealing sleeve 11 covers the entire crimping area beyond the conductor insulation.

Das Aushärten bzw. Verfestigen des Dichtmaterials kann durch Lufttrocknen, UV-Licht oder Abkühlen vor oder während der Montage der Dichthülse 11 geschehen.The hardening or hardening of the sealing material can be done by air drying, UV light or cooling before or during the assembly of the sealing sleeve 11.

Nach einer besonders vorteilhaften Ausführungsform kann danach die zusätzliche Crimphülse 12 um die Dichthülse 11 gecrimpt werden. Die zusätzliche Crimphülse 12 kann dabei nach dem Fertigstellen der oben aufgeführten Arbeitsschritte auf die Dichthülse 11 geschoben und auf dieser gecrimpt werden. Alternativ kann die Crimphülse 12 gemeinsam mit der Dichthülse 11 auf die Verbindungsstelle gebracht werden, beispielsweise wenn die Crimphülse 12 bereits in die Dichthülse integriert ist.According to a particularly advantageous embodiment, the additional crimp sleeve 12 can then be crimped around the sealing sleeve 11. The additional crimp sleeve 12 can be pushed onto the sealing sleeve 11 after completion of the above-mentioned steps and on this be crimped. Alternatively, the crimp sleeve 12 can be brought together with the sealing sleeve 11 on the connection point, for example, when the crimp sleeve 12 is already integrated into the sealing sleeve.

Claims (7)

Anordnung (1) zur Abdichtung einer elektrisch leitenden Verbindung zwischen einem von einer Isolierung (4) umgebenen elektrischen Leiter (2) und einem einen Crimp aufweisenden elektrischen Kontaktelement (6), bei welcher an einem von der Isolierung (4) befreiten Ende (5) des Leiters (2) das elektrische Kontaktelement (6) durch Crimpen befestigt ist, dadurch gekennzeichnet, daß - um den Crimpbereich eine homogene, zylinderförmige Fläche mittels eines verfestigten, im fließfähigen Zustand aufgebrachten Dichtmaterials (7) besteht, und - auf der zylinderförmigen Fläche eine elastische Dichthülse (10) festgelegt ist, welche sich bis über die Isolierung (4) des Leiters (2) erstreckt. Arrangement (1) for sealing an electrically conductive connection between an electrical conductor (2) surrounded by an insulation (4) and an electrical contact element (6) having a crimp, in which an end (5) is removed from the insulation (4) the conductor (2) the electrical contact element (6) is fixed by crimping, characterized in that - To the crimp a homogeneous, cylindrical surface by means of a solidified, applied in the flowable state sealing material (7), and - On the cylindrical surface, an elastic sealing sleeve (10) is fixed, which extends beyond the insulation (4) of the conductor (2). Anordnung (1) nach Anspruch 1, dadurch gekennzeichnet, daß eine zusätzliche Crimphülse (11) um die Dichthülse (11) gecrimpt ist.Arrangement (1) according to claim 1, characterized in that an additional crimping sleeve (11) is crimped around the sealing sleeve (11). Anordnung (1) nach Anspruch 2, dadurch gekennzeichnet, daß die zusätzliche Crimphülse (11) in die Dichthülse (10) integriert ist.Arrangement (1) according to claim 2, characterized in that the additional crimping sleeve (11) is integrated in the sealing sleeve (10). Anordnung (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Dichtmaterial (7) ein Klebstoff ist.Arrangement (1) according to one of the preceding claims, characterized in that the sealing material (7) is an adhesive. Anordnung (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Dichthülse (10) radial um ihren Innendurchmesser angeordnete Dichtlippen aufweist.Arrangement (1) according to one of the preceding claims, characterized in that the sealing sleeve (10) has radially arranged around its inner diameter sealing lips. Verfahren zur Abdichtung einer elektrisch leitenden Verbindung zwischen einem von einer Isolierung (4) umgebenen elektrischen Leiter (2) und einem einen Crimp aufweisenden elektrischen Kontaktelement (6), mit welchem das Ende (5) des Leiters (2) von seiner Isolierung (4) befreit wird, und mit welchem am Ende (5) des Leiters (2) das elektrische Kontaktelement (6) durch Crimpen befestigt wird, dadurch gekennzeichnet, daß - um den Crimpbereich ein fließfähiges Dichtmaterial (7) aufgetragen und verfestigt wird, sodass eine homogene, zylinderförmige Fläche entsteht, und - eine elastische Dichthülse (10) auf die zylinderförmige Fläche aufgeschoben wird, sodaß sich die Dichthülse (10) über die zylinderförmige Fläche und die Isolierung (4) des Leiters (2) erstreckt. Method for sealing an electrically conductive connection between an electrical conductor (2) surrounded by an insulation (4) and a crimp having electrical contact element (6), with which the end (5) of the conductor (2) of its insulation (4) is freed, and with which at the end (5) of the conductor (2), the electrical contact element (6) is fixed by crimping, characterized in that - applied to the crimp a flowable sealing material (7) and solidified, so that a homogeneous, cylindrical surface is formed, and - An elastic sealing sleeve (10) is pushed onto the cylindrical surface, so that the sealing sleeve (10) extends over the cylindrical surface and the insulation (4) of the conductor (2). Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß eine zusätzliche Crimphülse (11) um die Dichthülse (10) gecrimpt wird.Method according to claim 6, characterized in that an additional crimping sleeve (11) is crimped around the sealing sleeve (10).
EP17305139.2A 2017-02-07 2017-02-07 Method for sealing an electrically conductive connection Active EP3358678B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1001393A (en) * 1963-10-14 1965-08-18 Amp Inc Improvements in electrical connectors, electrical connections and methods of making electrical connections
DE3319880A1 (en) 1983-06-01 1984-12-06 Compakta Werke Baustoff-GmbH, 8225 Traunreut Elastic, liquid-tight connection of metal cable insulation to the metallic connecting clamp
WO2010134450A1 (en) * 2009-05-22 2010-11-25 Yazaki Corporation Water seal plug and connector with the water seal plug
EP2793326A1 (en) * 2013-04-16 2014-10-22 Delphi International Operations Luxembourg S.à r.l. Insulation or sealing crimp die
US9287655B2 (en) * 2012-07-31 2016-03-15 Yazaki Corporation Crimped terminal attached aluminum electric wire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1001393A (en) * 1963-10-14 1965-08-18 Amp Inc Improvements in electrical connectors, electrical connections and methods of making electrical connections
DE3319880A1 (en) 1983-06-01 1984-12-06 Compakta Werke Baustoff-GmbH, 8225 Traunreut Elastic, liquid-tight connection of metal cable insulation to the metallic connecting clamp
WO2010134450A1 (en) * 2009-05-22 2010-11-25 Yazaki Corporation Water seal plug and connector with the water seal plug
US9287655B2 (en) * 2012-07-31 2016-03-15 Yazaki Corporation Crimped terminal attached aluminum electric wire
EP2793326A1 (en) * 2013-04-16 2014-10-22 Delphi International Operations Luxembourg S.à r.l. Insulation or sealing crimp die

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