EP2874234B1 - Procédé d'isolation étanche d'un point de connexion entre un conducteur et un élément de contact - Google Patents

Procédé d'isolation étanche d'un point de connexion entre un conducteur et un élément de contact 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
Authority
EP
European Patent Office
Prior art keywords
conductor
contact element
insulation
tube
piece
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.)
Active
Application number
EP13306568.0A
Other languages
German (de)
English (en)
Other versions
EP2874234A1 (fr
Inventor
Helmut Steinberg
Gerhard Lindner
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
Original Assignee
Nexans SA
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Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP13306568.0A priority Critical patent/EP2874234B1/fr
Publication of EP2874234A1 publication Critical patent/EP2874234A1/fr
Application granted granted Critical
Publication of EP2874234B1 publication Critical patent/EP2874234B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Processing Of Terminals (AREA)

Claims (4)

  1. Procédé d'étanchéification du point de liaison entre un conducteur (1) électrique entouré d'une isolation (2) et un élément de contact (3) électrique tubulaire raccordé au conducteur (1) avec lequel de conducteur (1) est d'abord dégagé de l'isolation (2) à son extrémité, puis l'élément de contact (3) est enfiché sur le conducteur (1) et raccordé à celui-ci de façon électriquement conductrice, caractérisé en ce que
    - avant l'enfichage de l'élément de contact (3) sur le conducteur (1), un tronçon de tuyau flexible (8) en matériau isolant durablement élastique est d'abord, dans une forme dans laquelle sa deuxième extrémité (10) est courbée jusqu'à sa première extrémité (9), mis en place avec sa première extrémité (9) de façon fixement adjacente à l'isolation (2) du conducteur (1),
    - l'élément de contact (3) électrique tubulaire est ensuite enfiché sur l'isolation (2) tout en conservant sa forme tubulaire avec une surface en forme de cylindre droit, et raccordé de façon électriquement conductrice au conducteur (1) dans la zone limitrophe de l'isolation (2) du conducteur (1), et
    - pour finir, la deuxième extrémité (10) courbée du tronçon de tuyau flexible (8) est recourbée en réalisant une étanchéité étanche aux fluides du point de liaison entre l'isolation (2) du conducteur (1) et l'élément de contact (3) jusque sur l'élément de contact (3) avec un appui fixe sur celui-ci.
  2. Procédé selon la revendication 1, caractérisé en ce que, avant la mise en place sur le conducteur (1) isolé, le tronçon de tuyau flexible (8) est évasé mécaniquement.
  3. Procédé selon la revendication 1, caractérisé en ce que, avant la mise en place sur le conducteur (1) isolé, le tronçon de tuyau flexible (8) est évasé pneumatiquement.
  4. Procédé selon la revendication 1, caractérisé en ce que, avant la mise en place sur le conducteur (1) isolé, le tronçon de tuyau flexible (8) est évasé hydrauliquement.
EP13306568.0A 2013-11-15 2013-11-15 Procédé d'isolation étanche d'un point de connexion entre un conducteur et un élément de contact Active EP2874234B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13306568.0A EP2874234B1 (fr) 2013-11-15 2013-11-15 Procédé d'isolation étanche d'un point de connexion entre un conducteur et un élément de contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13306568.0A EP2874234B1 (fr) 2013-11-15 2013-11-15 Procédé d'isolation étanche d'un point de connexion entre un conducteur et un élément de contact

Publications (2)

Publication Number Publication Date
EP2874234A1 EP2874234A1 (fr) 2015-05-20
EP2874234B1 true EP2874234B1 (fr) 2016-09-14

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EP13306568.0A Active EP2874234B1 (fr) 2013-11-15 2013-11-15 Procédé d'isolation étanche d'un point de connexion entre un conducteur et un élément de contact

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EP (1) EP2874234B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016119656A1 (de) * 2016-10-14 2018-05-03 Bremi Fahrzeug-Elektrik Gmbh + Co. Kg Verfahren zum Herstellen eines Kabelschuhs und Kabelschuh zum elektrischen Verbinden eines Kabels mit einem stromführenden Element

Family Cites Families (5)

* 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 (fr) * 1981-04-01 1986-05-02 Fabrication Cables Elect Cie G Procede de depose d'une gaine protectrice sur l'extremite d'un cable electrique et dispositif pour la mise en oeuvre de celui-ci
JPH01283778A (ja) * 1988-05-11 1989-11-15 Toshin Denki Kk 電線接続具
DE10316603B3 (de) * 2003-04-11 2004-11-04 Harting Automotive Gmbh & Co. Kg Wasserdichte Quetschanschlussverbindung sowie Verfahren zur Herstellung einer wasserdichten Quetschverbindung
JP5621471B2 (ja) * 2010-09-28 2014-11-12 住友電装株式会社 端子付き電線、端子付き電線の製造方法及び防食部材

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