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EP1444703A1 - Flexible electrical line - Google Patents

Flexible electrical line

Info

Publication number
EP1444703A1
EP1444703A1 EP02803030A EP02803030A EP1444703A1 EP 1444703 A1 EP1444703 A1 EP 1444703A1 EP 02803030 A EP02803030 A EP 02803030A EP 02803030 A EP02803030 A EP 02803030A EP 1444703 A1 EP1444703 A1 EP 1444703A1
Authority
EP
European Patent Office
Prior art keywords
conductor
tensile
section
cross
metallic
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
EP02803030A
Other languages
German (de)
French (fr)
Other versions
EP1444703B1 (en
Inventor
Thomas Hochleithner
Thomas Noetzel
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.)
Gebauer and Griller Kabelwerke GmbH
Nexans SA
Original Assignee
Gebauer and Griller Kabelwerke GmbH
Nexans SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7964096&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1444703(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Gebauer and Griller Kabelwerke GmbH, Nexans SA filed Critical Gebauer and Griller Kabelwerke GmbH
Publication of EP1444703A1 publication Critical patent/EP1444703A1/en
Application granted granted Critical
Publication of EP1444703B1 publication Critical patent/EP1444703B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores

Definitions

  • the invention relates to a flexible electrical line, which has at least one electrical conductor, which consists of a tensile, non-metallic element and a plurality of metallic wires arranged around the same and made of electrically highly conductive material (DE-OS 25 19 687).
  • Such lines are used for example in motor vehicles. They have to be very flexible and tensile and also have to be able to withstand high mechanical loads. This already applies to their assembly, further processing and laying, but especially in operation.
  • the cables in the vehicle are constantly exposed to vibrations and stone chips.
  • EP 1 089 299 A2 shows a tensile conductor in which a plurality of wires made of electrically highly conductive material are stranded around a central tensile wire. A common insulation is attached over the electrically good conductive wires.
  • the tensile wire consists of several tensile threads of suitable material, which are stranded together and are embedded in metallic base material. The base material fills all the free spaces between the threads and surrounds them as a whole.
  • Such a tensile wire is not only complex to manufacture, but relatively stiff and does not yield in the radial direction. This is noticeable when contact elements are to be attached to a conductor equipped with them by crimping.
  • the invention has for its object to design the above-described line so that it can meet all requirements for flexibility, tensile strength, contactability and fatigue strength without restriction.
  • the tensile element is a loose composite of a large number of aramid thread, the cross section of which corresponds to the cross section of a single metallic wire, and
  • This cable is highly flexible and tensile. It is also characterized by high flexural fatigue strength, since its tensile element is very easy to deform in the radial direction and is very flexible overall. The tensile element does not thereby hinder the deformation of the conductor required when connecting contact parts by crimping. The individual wires of the conductor should be deformed in a honeycomb shape in a crimp connection. The cable or its conductor thus meet all existing regulations for a permanently effective crimp connection. Nevertheless, the tensile strength required when assembling and laying the cable is guaranteed.
  • each conductor consisting of a large number of wires can be reduced to the electrically required value.
  • This advantageous construction of the conductor applies to a wide temperature range from approximately +160 ° C. to -70 ° C. Since aramid is also neither melting nor promoting combustion, even short-term, higher temperatures of more than 300 ° C have hardly any disturbing effects.
  • the cable can be used with particular advantage where it is continuously exposed to strong vibrations, for example in vehicle construction. An embodiment of the object of the invention is shown in the drawings.
  • Fig. 1 is a side view of a line consisting of an insulated conductor according to the
  • Fig. 2 shows a section through Fig. 1 along the line II - II in an enlarged view ..
  • the electrical line L according to FIGS. 1 and 2 has a conductor 1, which consists of a large number of metallic wires 2 made of electrically highly conductive material and a tensile element 3.
  • the wires 2 are preferably copper wires.
  • the tensile element 3 is a loose composite of very thin but tensile aramid thread 4.
  • a suitable material has become known under the trade name "Kevlar”. This loose composite is soft and yielding in the radial direction, so that the element 3 is highly flexible Insulation 5 is attached to conductor 1. It consists, for example, of polyurethane.
  • the conductor 1 has a large number of metallic wires 2, which are combined with the tensile element 3, the cross-section of which corresponds overall to that of an individual wire 2, to form the unit of the conductor 1. This can be done in any way. Suitable procedures are called stranding, stranding or gagging. After its production, the conductor 1 should have an approximately circular cross section before the insulation 5 is applied, for example by means of an extruder.
  • the conductor 1 has a total cross section of 0.5 mm 2 , for example. It can consist of 61 wires 2, each with a diameter of 0.1 mm.
  • the element 3 consisting of aramid thread 4 can also have a diameter of 0.1 mm.
  • the aramid thread 4 of the tensile element 4 can be coated with a moisture-repellent material to protect against moisture that may have penetrated into the conductor 1.
  • a moisture-repellent material are, for example, resins or wax.
  • a line L according to the invention can consist of only one insulated conductor 1. However, it can also have two or more such conductors, which are then expediently stranded with one another and, for example, surrounded by a common sheath consisting of polyurethane.

Landscapes

  • Insulated Conductors (AREA)
  • Non-Insulated Conductors (AREA)
  • Ropes Or Cables (AREA)

Abstract

The invention relates to a flexible electrical line (L) having at least one electrical conductor (1). The conductor (1) is comprised of a non-metallic element, which is resistant to tensile forces, and of a multitude of metallic wires (2), which are arranged around the same and made of a material that conducts electricity well. In order to obtain the flexibility and to prevent ruptures, particularly in the event of intense vibrations, a loose combination consisting of a large number of aramide fibers (4) is used as the element (3) that is resistant to tensile forces. The cross-section of the loose combination corresponds to the cross-section of a single metallic wire (2). In addition, the conductor (1) is surrounded by an insulation.

Description

Flexible elektrische LeitungFlexible electrical wire
Beschreibungdescription
Die Erfindung bezieht sich auf eine flexible elektrische Leitung, die mindestens einen elektrischen Leiter aufweist, der aus einem zugfesten, nicht metallischen Element und einer Vielzahl von um dasselbe herum angeordneten metallischen Drähten aus elektrisch gut leitendem Material besteht (DE-OS 25 19 687).The invention relates to a flexible electrical line, which has at least one electrical conductor, which consists of a tensile, non-metallic element and a plurality of metallic wires arranged around the same and made of electrically highly conductive material (DE-OS 25 19 687).
Derartige Leitungen werden beispielsweise in Kraftfahrzeugen eingesetzt. Sie müssen sehr gut biegbar und zugfest sein und außerdem hohe mechanische Belastungen aushalten können. Das gilt bereits für ihre Konfektionierung, weitere Verarbeitung und Verlegung, besonders aber im Betrieb. Die Leitungen sind im Fahrzeug dauernd Schwingungen und auch Steinschlag ausgesetzt.Such lines are used for example in motor vehicles. They have to be very flexible and tensile and also have to be able to withstand high mechanical loads. This already applies to their assembly, further processing and laying, but especially in operation. The cables in the vehicle are constantly exposed to vibrations and stone chips.
Die EP 1 089 299 A2 zeigt einen zugfesten Leiter, bei dem mehrere Drähte aus elektrisch gut leitendem Material um einen zentralen, zugfesten Draht herumverseilt sind. Über den elektrisch gut leitenden Drähten ist eine gemeinsame Isolierung angebracht. Der zugfeste Draht besteht aus mehreren, miteinander verseilten zugfesten Fäden aus geeignetem Material, die in metallisches Grundmaterial eingebettet sind. Das Grundmaterial füllt alle freien Räume zwischen den Fäden aus und umgibt dieselben insgesamt. Ein solcher zugfester Draht ist nicht nur aufwendig herzustellen, sondern relativ steif und in radialer Richtung nicht nachgebend. Das macht sich störend bemerkbar, wenn an einem damit ausgerüsteten Leiter Kontaktelemente durch Crimpen befestigt werden sollen. Ein solcher Leiter ist außerdem in seiner Biegbarkeit eingeschränkt und er hat eine verminderte Biegewechselfestigkeit. Die eingangs erwähnte DE-OS 25 1 9 687 beschreibt eine Leitung, bei der eine große Anzahl von Kupferdrähten um einen Faden aus Glasseidenzwirn angeordnet ist. Ein solcher Faden ist durch das Zwirnen immer noch relativ steif und in radialer Richtung nicht nachgebend. Es ergeben sich daher die gleichen Probleme wie bei dem Leiter nach der EP 1 089 299 A2.EP 1 089 299 A2 shows a tensile conductor in which a plurality of wires made of electrically highly conductive material are stranded around a central tensile wire. A common insulation is attached over the electrically good conductive wires. The tensile wire consists of several tensile threads of suitable material, which are stranded together and are embedded in metallic base material. The base material fills all the free spaces between the threads and surrounds them as a whole. Such a tensile wire is not only complex to manufacture, but relatively stiff and does not yield in the radial direction. This is noticeable when contact elements are to be attached to a conductor equipped with them by crimping. Such a conductor is also restricted in its bendability and it has a reduced flexural fatigue strength. The aforementioned DE-OS 25 1 9 687 describes a line in which a large number of copper wires are arranged around a thread made of glass fiber thread. Such a thread is still relatively stiff due to the twisting and does not yield in the radial direction. The same problems therefore arise as with the conductor according to EP 1 089 299 A2.
Der Erfindung liegt die Aufgabe zugrunde, die eingangs geschilderte Leitung so zu gestalten, daß sie alle Forderungen für Biegsamkeit, Zugfestigkeit, Kontakttierbarkeit und Biegewechselfestigkeit ohne Einschränkung erfüllen kann.The invention has for its object to design the above-described line so that it can meet all requirements for flexibility, tensile strength, contactability and fatigue strength without restriction.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst,According to the invention, this object is achieved by
— daß das zugfeste Element ein loser Verbund aus einer großen Anzahl von Aramidfaden ist, dessen Querschnitt dem Querschnitt eines einzelnen metallischen Drahtes entspricht, und- That the tensile element is a loose composite of a large number of aramid thread, the cross section of which corresponds to the cross section of a single metallic wire, and
— daß der Leiter von einer Isolierung umgeben ist.- That the conductor is surrounded by insulation.
Diese Leitung ist hoch flexibel und zugfest. Sie zeichnet sich außerdem durch große Biegewechselfestigkeit aus, da ihr zugfestes Element in radialer Richtung sehr leicht verformbar und insgesamt sehr flexibel ist. Das zugfeste Element behindert dadurch auch nicht die beim Anschließen von Kontaktteilen durch Crimpen erforderliche Verformung des Leiters. Die einzelnen Drähte des Leiters sollen in einer Crimpverbindung etwa wabenförmig verformt sein. Die Leitung bzw. deren Leiter erfüllen somit alle für einen dauerhaft wirksamen Crimpanschluß bestehenden Vorschriften. Trotzdem ist die beim Konfektionieren und Verlegen der Leitung erforderliche Zugfestigkeit gewährleistet. Da das aus den Aramidfaden bestehende Element alle auftretenden Zugbelastungen aufnimmt, kann der leitende Querschnitt eines jeden, aus einer Vielzahl von Drähten bestehenden Leiters auf den elektrisch erforderlichen Wert reduziert werden. Dieser vorteilhafte Aufbau des Leiters gilt für einen weiten Temperaturbereich von etwa + 1 60 °C bis - 70 °C. Da Aramid außerdem weder schmilzt noch verbrennungsfördernd ist, wirken sich auch kurzzeitig auftretende, höhere Temperaturen von mehr als 300 °C kaum störend aus. Die Leitung kann mit besonderem Vorteil dort verwendet werden, wo sie dauernd starken Schwingungen ausgesetzt ist, beispielsweise im Fahrzeugbau. Ein Ausführungsbeispiel des Erfindungsgegenstαndes ist in den Zeichnungen dargestellt.This cable is highly flexible and tensile. It is also characterized by high flexural fatigue strength, since its tensile element is very easy to deform in the radial direction and is very flexible overall. The tensile element does not thereby hinder the deformation of the conductor required when connecting contact parts by crimping. The individual wires of the conductor should be deformed in a honeycomb shape in a crimp connection. The cable or its conductor thus meet all existing regulations for a permanently effective crimp connection. Nevertheless, the tensile strength required when assembling and laying the cable is guaranteed. Since the element consisting of the aramid thread absorbs all the tensile loads that occur, the conductive cross section of each conductor consisting of a large number of wires can be reduced to the electrically required value. This advantageous construction of the conductor applies to a wide temperature range from approximately +160 ° C. to -70 ° C. Since aramid is also neither melting nor promoting combustion, even short-term, higher temperatures of more than 300 ° C have hardly any disturbing effects. The cable can be used with particular advantage where it is continuously exposed to strong vibrations, for example in vehicle construction. An embodiment of the object of the invention is shown in the drawings.
Es zeigen:Show it:
Fig. 1 eine Seitenansicht einer aus einem isolierten Leiter bestehenden Leitung nach derFig. 1 is a side view of a line consisting of an insulated conductor according to the
Erfindung.Invention.
Fig. 2 einen Schnitt durch Fig. 1 längs der Linie II - II in vergrößerter Darstellung..Fig. 2 shows a section through Fig. 1 along the line II - II in an enlarged view ..
Die elektrische Leitung L nach den Fig. 1 und 2 hat einen Leiter 1 , der aus einer Vielzahl von metallischen Drähten 2 aus elektrisch gut leitendem Material und einem zugfesten Element 3 besteht. Die Drähte 2 sind vorzugsweise Kupferdrähte. Das zugfeste Element 3 ist ein loser Verbund von sehr dünnen, aber zugfesten Aramidfaden 4. Ein geeignetes Material ist unter dem Handelsnamen „Kevlar" bekannt geworden. Dieser lose Verbund ist in radialer Richtung weich und nachgebend, so daß das Element 3 hochflexibel ist. Über dem Leiter 1 ist eine Isolierung 5 angebracht. Sie besteht beispielsweise aus Polyurethan.The electrical line L according to FIGS. 1 and 2 has a conductor 1, which consists of a large number of metallic wires 2 made of electrically highly conductive material and a tensile element 3. The wires 2 are preferably copper wires. The tensile element 3 is a loose composite of very thin but tensile aramid thread 4. A suitable material has become known under the trade name "Kevlar". This loose composite is soft and yielding in the radial direction, so that the element 3 is highly flexible Insulation 5 is attached to conductor 1. It consists, for example, of polyurethane.
Der Leiter 1 hat eine große Anzahl von metallischen Drähten 2, die mit dem zugfesten Element 3, dessen Querschnitt insgesamt dem eines einzelnen Drahtes 2 entspricht, zur Einheit des Leiters 1 zusammengefaßt sind. Das kann an sich beliebig durchgeführt werden. Geeignete Verfahren werden mit Verseilen, Verlitzen oder Verwürgen bezeichnet. Der Leiter 1 soll nach seiner Herstellung einen etwa kreisrunden Querschnitt haben, bevor die Isolierung 5 beispielsweise mittels eines Extruders aufgebracht wird.The conductor 1 has a large number of metallic wires 2, which are combined with the tensile element 3, the cross-section of which corresponds overall to that of an individual wire 2, to form the unit of the conductor 1. This can be done in any way. Suitable procedures are called stranding, stranding or gagging. After its production, the conductor 1 should have an approximately circular cross section before the insulation 5 is applied, for example by means of an extruder.
Der Leiter 1 hat beispielsweise einen Gesamtquerschnitt von 0,5 mm2. Er kann dabei aus 61 Drähten 2 bestehen, die jeder einen Durchmesser von 0,1 mm haben. Das aus Aramidfaden 4 bestehende Element 3 kann einen Durchmesser von ebenfalls 0,1 mm aufweisen.The conductor 1 has a total cross section of 0.5 mm 2 , for example. It can consist of 61 wires 2, each with a diameter of 0.1 mm. The element 3 consisting of aramid thread 4 can also have a diameter of 0.1 mm.
Die Aramidfaden 4 des zugfesten Elements 4 können zum Schutz gegen möglicherweise in den Leiter 1 eingedrungene Feuchtigkeit mit einem feuchtigkeitsabweisenden Material beschichtet sein. Solche Materialien sind beispielsweise Harze oder Wachs. Eine Leitung L nach der Erfindung kann entsprechend dem dargestellten Ausführungsbeispiel aus nur einem isolierten Leiter 1 bestehen. Sie kann aber auch zwei oder mehr derartige Leiter aufweisen, die dann zweckmäßig miteinander verseilt und beispielsweise von einem gemeinsamen, aus Polyurethan bestehenden Mantel umgeben sind. The aramid thread 4 of the tensile element 4 can be coated with a moisture-repellent material to protect against moisture that may have penetrated into the conductor 1. Such materials are, for example, resins or wax. According to the exemplary embodiment shown, a line L according to the invention can consist of only one insulated conductor 1. However, it can also have two or more such conductors, which are then expediently stranded with one another and, for example, surrounded by a common sheath consisting of polyurethane.

Claims

Schutzαnsprüche Schutzαnsprüche
1 . Flexible elektrische Leitung, die mindestens einen elektrischen Leiter aufweist, der aus einem zugfesten, nicht metallischen Element und einer Vielzahl von um dasselbe herum angeordneten metallischen Drähten aus elektrisch gut leitendem Material besteht, dadurch gekennzeichnet,1 . Flexible electrical line, which has at least one electrical conductor, which consists of a tensile, non-metallic element and a plurality of metallic wires arranged around the same and made of electrically highly conductive material, characterized in that
— daß das zugfeste Element (3) ein loser Verbund aus einer großen Anzahl von Aramidfaden (4) ist, dessen Querschnitt dem Querschnitt eines einzelnen metallischen Drahtes (2) entspricht, und- That the tensile element (3) is a loose composite of a large number of aramid thread (4), the cross section of which corresponds to the cross section of a single metallic wire (2), and
— daß der Leiter (1 ) von einer Isolierung (5) umgeben ist.- That the conductor (1) is surrounded by insulation (5).
2. Leitung nach Anspruch 1 , dadurch gekennzeichnet, daß die Aramidfaden (4) mit feuchtigkeitsabweisendem Material, wie einem Harz oder Wachs, beschichtet sind.2. Line according to claim 1, characterized in that the aramid thread (4) are coated with moisture-repellent material, such as a resin or wax.
3. Leitung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Drähte (2) aus Kupfer bestehen. 3. Line according to claim 1 or 2, characterized in that the wires (2) consist of copper.
EP02803030A 2001-11-16 2002-11-15 Flexible electrical line Revoked EP1444703B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20118713U DE20118713U1 (en) 2001-11-16 2001-11-16 Flexible electrical wire
DE20118713U 2001-11-16
PCT/EP2002/012796 WO2003043030A1 (en) 2001-11-16 2002-11-15 Flexible electrical line

Publications (2)

Publication Number Publication Date
EP1444703A1 true EP1444703A1 (en) 2004-08-11
EP1444703B1 EP1444703B1 (en) 2006-12-27

Family

ID=7964096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02803030A Revoked EP1444703B1 (en) 2001-11-16 2002-11-15 Flexible electrical line

Country Status (7)

Country Link
US (1) US7145082B2 (en)
EP (1) EP1444703B1 (en)
JP (1) JP4597516B2 (en)
CN (1) CN1290122C (en)
AT (1) ATE349759T1 (en)
DE (2) DE20118713U1 (en)
WO (1) WO2003043030A1 (en)

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Also Published As

Publication number Publication date
US20050000724A1 (en) 2005-01-06
EP1444703B1 (en) 2006-12-27
JP2005510010A (en) 2005-04-14
CN1572003A (en) 2005-01-26
WO2003043030A1 (en) 2003-05-22
DE50209106D1 (en) 2007-02-08
ATE349759T1 (en) 2007-01-15
JP4597516B2 (en) 2010-12-15
CN1290122C (en) 2006-12-13
US7145082B2 (en) 2006-12-05
DE20118713U1 (en) 2002-01-17

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