FR2521355A1 - Electrical connection for joining copper and aluminium conductors - has copper washers and an interconnecting sleeve which are crushed onto an aluminium terminal lug - Google Patents

Electrical connection for joining copper and aluminium conductors - has copper washers and an interconnecting sleeve which are crushed onto an aluminium terminal lug Download PDF

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Publication number
FR2521355A1
FR2521355A1 FR8201966A FR8201966A FR2521355A1 FR 2521355 A1 FR2521355 A1 FR 2521355A1 FR 8201966 A FR8201966 A FR 8201966A FR 8201966 A FR8201966 A FR 8201966A FR 2521355 A1 FR2521355 A1 FR 2521355A1
Authority
FR
France
Prior art keywords
washers
copper
aluminium
terminal
aluminum
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.)
Pending
Application number
FR8201966A
Other languages
French (fr)
Inventor
Andre Georges Beaurain
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.)
VERLANT ET BEAURAIN
Original Assignee
VERLANT ET BEAURAIN
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
Application filed by VERLANT ET BEAURAIN filed Critical VERLANT ET BEAURAIN
Priority to FR8201966A priority Critical patent/FR2521355A1/en
Publication of FR2521355A1 publication Critical patent/FR2521355A1/en
Pending legal-status Critical Current

Links

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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact
    • 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
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Abstract

The device has a cable termination piece (10), made of aluminium, with its end shaped into a flat tongue (10') with a circular hole. The surface of the tongue has grooves cut either circumferentially or radially cut into it. Two copper washers (20,20') are positioned either side of the tongue and a short copper sleeve (28) fits inside the rim of the hole and connects the two washers electrically. The assembly is bolted tightly together, compressing the copper contact to be connected against one of the washers. The force of the tightened bolt encrusts the aluminium with deformed copper and the sleeve is crushed into good mechanical and electrical contact with the washers. The grooves in the aluminium also help to stabilise a protective film of varnish which can be applied to the assembly.

Description

L'invention est relative à des perfectionnements apportés aux raccords bi-métalliques à usage électrique. The invention relates to improvements made to bi-metallic fittings for electrical use.

On sait que de tels raccords comportent un moyen assurant la liaison de la partie aluminium avec la partie cuivre d'un raccord électrique conçu de façon à connecter un conducteur en aluminium sur une borne en cuivre d'un appareillage électrique. We know that such connections include means ensuring the connection of the aluminum part with the copper part of an electrical connector designed so as to connect an aluminum conductor to a copper terminal of an electrical appliance.

On connatt diverses solutions permettant de réaliser cette liaison. Ces solutions posent des problèmes de fiabilité lors de la fabrication et également lors de l'utilisation. Various solutions are known for making this connection. These solutions pose reliability problems during manufacture and also during use.

Pour illustrer l'état de la technique en ce domaine on se reportera aux figures 1 à 3 qui illustrent en des vues en élévation latérale, avec éventuellement coupe et arrachement partiels, trois solutions bien connues. To illustrate the state of the art in this field, reference is made to FIGS. 1 to 3 which illustrate in side elevation views, with possible partial cut and cutaway, three well known solutions.

La figure 1 représente une liaison mécanique entre un conducteur en aluminium Il et une borne en cuivre d'un appareillage 12.  FIG. 1 represents a mechanical connection between an aluminum conductor II and a copper terminal of an apparatus 12.

Cette liaison est obtenue par l'intermédiaire d'une cosse en cuivre 14 vissée à l'extrémité en aluminium 10 et serrée par un boulon sur la borne 12. Dans une telle liaison la qualité électrique et mécanique de la liaison dépend en particulier de la précision des usinages et de l'assemblage. Lors de l'utilisation, ce type de liaison est fragile en regard des différentes contraintes auxquelles il est soumis telles que notamment : flexion, traction, vibrations, dilatation etc...This connection is obtained by means of a copper lug 14 screwed to the aluminum end 10 and tightened by a bolt on the terminal 12. In such a connection the electrical and mechanical quality of the connection depends in particular on the precision of machining and assembly. During use, this type of connection is fragile with regard to the various constraints to which it is subjected such as in particular: bending, traction, vibrations, expansion, etc.

La figure 2 représente une liaison par sertissage d'une bague en cuivre 16 sur la partie en aluminium 10. Dans une telle réalisation, la qualité électrique et mécanique dO la liaison dépend d'un bon sertissage de la partie en cuivre 16 sur ltex- trémité 10 en aluminium. il s'avère à l'usage, que ce type de liaison est techniquement meilleur que la liaison mécanique représentée sur la figure 1, cependant, les contraintes à l'utilisation sont également néfastes à la tenue du sertissage aluminium-cuivre. FIG. 2 represents a connection by crimping a copper ring 16 on the aluminum part 10. In such an embodiment, the electrical and mechanical quality of the connection depends on a good crimping of the copper part 16 on ltex- aluminum end 10. it turns out in use, that this type of connection is technically better than the mechanical connection shown in FIG. 1, however, the constraints in use are also harmful to the strength of the aluminum-copper crimping.

Sur la figure 3 on a représenté une liaison réalisée par soudure 18. il s'agit de la technique la plus couramment utilisée car elle permet d'obtenir de trds bons résultats électriques et mécaniques. Malheureusement, malgré les contrôles sévères effectués en cours de fabrication, il arrive que des raccords de ce type cassent à l'utilisation ou que la liaison cède partiellement à l'endroit de la soudure ce qui se traduit par une détérioration rapide du raccord. In Figure 3 there is shown a connection made by welding 18. this is the most commonly used technique because it provides very good electrical and mechanical results. Unfortunately, despite the strict controls carried out during manufacturing, it happens that fittings of this type break during use or that the connection partially gives way at the place of the weld, which results in rapid deterioration of the fitting.

La présente invention se propose d'apporter une solution nouvelle en remplaçant la liaison problématique par soudure et en écartant les autres solutions qui se sont avérées électriquement peu satisfaisantes. L'idée à la base de la présente invention est d'utiliser la pression importante du boulon lors du montage de la cosse sur l'appareillage, afin d'obtenir un excellent contact électrique. The present invention proposes to provide a new solution by replacing the problematic connection by welding and by discarding the other solutions which have been found to be electrically unsatisfactory. The idea behind the present invention is to use the high pressure of the bolt when mounting the terminal on the apparatus, in order to obtain excellent electrical contact.

L'invention concerne donc un raccord bi-métallique à usage électrique, caractérisé en ce qu'il comporte deux rondelles crantées en cuivre, incrustées de part et 8'autre de la cosse prévue A l'extrémité de la partie en aluminium 10 raccordée au conducteur 11, des moyens étant par ailleurs prévus pour solidariser les deux rondelles, le serrage de la cosse sur la borne de l'appareillage à raccorder s'effectuant par un boulon ou similaire qui exerce un effet direct sur les deux rondelles qu'il comprime fortement sur 1'aluminium.  The invention therefore relates to a bi-metallic connector for electrical use, characterized in that it comprises two notched copper washers, inlaid on either side of the terminal provided at the end of the aluminum part 10 connected to the conductor 11, means being also provided for securing the two washers, the clamping of the terminal on the terminal of the equipment to be connected being effected by a bolt or the like which has a direct effect on the two washers which it compresses strongly on aluminum.

Selon l'invention les deux rondelles sont rendues solidaires & l'aide d'un tube mince, serti sur l'alésage desdites rondelles. According to the invention, the two washers are made integral with the aid of a thin tube, crimped onto the bore of said washers.

On peut également réaliser cette solidarisation en prévoyant une rondelle maie et une rondelle femelle.We can also achieve this by providing a washer and a female washer.

D'autres caractéristiques et avantages de cette invention ressortiront de la description faite ci-aprés en référence aux dessins qui en illustrent un exemple dé réalisation dépourvu de tout caractère limitatif. Sur les dessins
- les figures 1 à 3 illustrent l'état antérieur de la technique
discuté ci-dessus
- la figure 4 est une vue en élévation latérale d'un raccord
pour conducteur en aluminium muni de rondelles crantées selon
l'invention, et
- la figure 5 est une vue à échelle agrandie, en coupe partielle
d'une liaison selon l'invention.Other characteristics and advantages of this invention will emerge from the description given below with reference to the drawings which illustrate an example of it devoid of any limiting character. On the drawings
- Figures 1 to 3 illustrate the prior art
discussed above
- Figure 4 is a side elevational view of a connector
for aluminum conductor with notched washers according to
the invention, and
- Figure 5 is an enlarged view, in partial section
of a connection according to the invention.

Selon l'invention la plage du raccord est constituée par deux rondelles en cuivre 20, 20', ancrées dans la cosse 101.prévue à l'extrémité de la partie en aluminium 10. Ces rondelles 20, 20' sont munies de stries ou de rainures circulaires 24 et/ou radiales (non visibles sur le dessin) afin de réaliser l'étanchéité et la surface de contact maximale de la liaison cosse 10'-rondelles et d'obtenir une incrustation par sertissage des rondelles dans la cosse en aluminium 10'. En outre les zones telles que 26 peuvent être revêtues d'un vernis protecteur. According to the invention, the range of the connection is constituted by two copper washers 20, 20 ', anchored in the terminal 101. Provided at the end of the aluminum part 10. These washers 20, 20' are provided with grooves or circular and / or radial grooves 24 (not visible in the drawing) in order to achieve the seal and the maximum contact surface of the lug 10'-washer connection and to obtain an inlay by crimping the washers in the aluminum lug 10 '. In addition, areas such as 26 can be coated with a protective varnish.

Toujours selon l'invention on prévoit des moyens pour solidariser ces deux rondelles crantées en cuivre 20-20'. Dans cet exemple de réalisation ces- moyens consistent en un tube mince 28, introduit dans l'alésage des deux rondelles et serti sur ces deux rondelles. Still according to the invention, means are provided for securing these two notched 20-20 'copper washers. In this exemplary embodiment, these means consist of a thin tube 28, introduced into the bore of the two washers and crimped onto these two washers.

Lors du serrage du boulon 22 on exerce une action directe sur les deux rondelles qui se trouvent ainsi fortement comprimées sur l'aluminium. When tightening the bolt 22 there is a direct action on the two washers which are thus strongly compressed on the aluminum.

L'invention permet donc d'obtenir un raccord bi-métallique garantissant un excellent contact électrique, résistant bien aux différentes contraintes telles que notamment flexion, traction, vibration;, dilatation etc... et présentant par ailleurs d'excellentes propriétés mécaniques. The invention therefore makes it possible to obtain a bi-metallic connection guaranteeing excellent electrical contact, well resistant to various stresses such as in particular bending, traction, vibration;, expansion, etc., and moreover having excellent mechanical properties.

Il demeure bien entendu que cette invention n'est pas limitée à l'exemple de réalisation décrit et représenté, mais qu'elle en englobe toutes les variantes. C'est ainsi notamment que la solidarisation des deux rondelles en cuivre 20-20' peut être réalisée par tout autre moyen que le tube 28, par exemple en prévoyant des rondelles respectivement male et femelle.  It remains to be understood that this invention is not limited to the embodiment described and shown, but that it encompasses all variants thereof. Thus, in particular, the joining of the two copper washers 20-20 ′ can be achieved by any other means than the tube 28, for example by providing washers respectively male and female.

Claims (4)

REVENDICATIONS 1.- Raccord bi-métallique à usage électrique pour relier un conducteur en aluminium à la borne en cuivre d'un appareillage électrique, caractérisé en ce qu'il comporte deux rondelles crantées en cuivre (20-20'), incrustées de part et d'autre de la cosse (10') prévue à l'extrémité de la partie en aluminium (10), raccordée au conducteur 11, des moyens étant en outre prévus pour solidariser lesdites rondelles, le serrage de la cosse (10') sur la borne (12) de l'appareillage å raccorder s'effectuant à l'aide de boulons (22) qui exercent un effet direct sur les deux rondelles qui sont ainsi fortement comprimées sur l'aluminium. 1.- Bi-metallic connection for electrical use to connect an aluminum conductor to the copper terminal of an electrical appliance, characterized in that it comprises two notched copper washers (20-20 '), inlaid on the side and on the other side of the terminal (10 ') provided at the end of the aluminum part (10), connected to the conductor 11, means being furthermore provided for securing said washers, the clamping of the terminal (10') on the terminal (12) of the switchgear to be connected using bolts (22) which have a direct effect on the two washers which are thus strongly compressed on the aluminum. 2.- Raccord selon la revendication 1, caractérisé en ce que les moyens solidarisant les deux rondelles sont constitués par un tube mince (28), introduit dans l'alésage desdites rondelles et serti sur ces dernières. 2.- A connector according to claim 1, characterized in that the means securing the two washers consist of a thin tube (28), introduced into the bore of said washers and crimped thereon. 3.- Raccord selon la revendication 1, caractérisé en ce que la solidarisation des deux rondelles (20-20') est réalisée en prévoyant respectivement une rondelle mâle et une rondelle femelle. 3.- Connection according to claim 1, characterized in that the joining of the two washers (20-20 ') is carried out by providing respectively a male washer and a female washer. 4.- Raccord selon l'une quelconque des revendications précédentes, caractérisé en ce que les rondelles sont munies de stries radiales et circulaires (24).  4.- A connector according to any one of the preceding claims, characterized in that the washers are provided with radial and circular grooves (24).
FR8201966A 1982-02-08 1982-02-08 Electrical connection for joining copper and aluminium conductors - has copper washers and an interconnecting sleeve which are crushed onto an aluminium terminal lug Pending FR2521355A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8201966A FR2521355A1 (en) 1982-02-08 1982-02-08 Electrical connection for joining copper and aluminium conductors - has copper washers and an interconnecting sleeve which are crushed onto an aluminium terminal lug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8201966A FR2521355A1 (en) 1982-02-08 1982-02-08 Electrical connection for joining copper and aluminium conductors - has copper washers and an interconnecting sleeve which are crushed onto an aluminium terminal lug

Publications (1)

Publication Number Publication Date
FR2521355A1 true FR2521355A1 (en) 1983-08-12

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013653A1 (en) * 2000-03-18 2001-10-04 Mannesmann Sachs Ag Electrical connecting element for connection of electrical components to electrical power source e.g. for automobile industry, part of the contact zone is designed as resistance zone forming integral charging resistor
GB2397953A (en) * 2003-01-31 2004-08-04 Ten47 Ltd Electrical cable jointing apparatus
FR2925774A1 (en) * 2007-12-21 2009-06-26 Valeo Systemes De Liaison Sa Bimaterial terminal i.e. bimetallic terminal, for battery of motor vehicle rod, whose projected part is cooperated with nut to ensure stability of electrical connection between flange and plug and fixation to partition crossed by terminal
DE102014000231A1 (en) * 2014-01-09 2015-07-09 Sfs Intec Holding Ag Clip nut, mounting arrangement and method for producing a clip nut

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10013653A1 (en) * 2000-03-18 2001-10-04 Mannesmann Sachs Ag Electrical connecting element for connection of electrical components to electrical power source e.g. for automobile industry, part of the contact zone is designed as resistance zone forming integral charging resistor
GB2397953A (en) * 2003-01-31 2004-08-04 Ten47 Ltd Electrical cable jointing apparatus
FR2925774A1 (en) * 2007-12-21 2009-06-26 Valeo Systemes De Liaison Sa Bimaterial terminal i.e. bimetallic terminal, for battery of motor vehicle rod, whose projected part is cooperated with nut to ensure stability of electrical connection between flange and plug and fixation to partition crossed by terminal
DE102014000231A1 (en) * 2014-01-09 2015-07-09 Sfs Intec Holding Ag Clip nut, mounting arrangement and method for producing a clip nut

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