FR2631746A1 - Electrical connection washer for lugs made of aluminium or other metal - Google Patents

Electrical connection washer for lugs made of aluminium or other metal Download PDF

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Publication number
FR2631746A1
FR2631746A1 FR8807045A FR8807045A FR2631746A1 FR 2631746 A1 FR2631746 A1 FR 2631746A1 FR 8807045 A FR8807045 A FR 8807045A FR 8807045 A FR8807045 A FR 8807045A FR 2631746 A1 FR2631746 A1 FR 2631746A1
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FR
France
Prior art keywords
lugs
central core
washer
metal
asperities
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
FR8807045A
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French (fr)
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8807045A priority Critical patent/FR2631746A1/en
Publication of FR2631746A1 publication Critical patent/FR2631746A1/en
Pending legal-status Critical Current

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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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
    • H01R4/2408—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation actuated by clamping screws
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member

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  • Bolts, Nuts, And Washers (AREA)

Abstract

This washer, which is intended to be interposed between the connection areas 3a, 4a of two lugs 3, 4, comprises an annular central core 2a made of electrically conducting material, at the end of each face of which there are asperities 7 capable of breaking the possibly oxidised layers of the connection areas 3a, 4a of the lugs 3, 4 and which is entirely covered by an outer case 2b made of a material which is at least slightly elastic and electrically insulating, the thickness of the case 2b covering each asperity of the central core 2a being determined so that, when clamping the washer 2 between the connection areas 3a, 4a of the lugs 3, 4, the asperities 7 of the central core 2a pass through it and penetrate, at least partially, into the connection areas 3a, 4a, the case 2b sealing the contact zones between the asperities 7 of the central core 2a and the connection areas 3a, 4a of the lugs 3, 4.

Description

"Rondelle de raccordement électrique
pour cosses en aluminium ou autre métal"
La présente invention concerne une rondelle de raccordement électrique pour cosses en aluminium ou autre métal."Electrical connection washer
for aluminum or other metal lugs "
The present invention relates to an electrical connection washer for aluminum or other metal lugs.

On sait que, lorsqu'elles sont soumises à lthumidité, les surfaces en contact de deux pièces assemblées, respectivement en aluminium et en cuivre, sont le siège d'une corrosion susceptible de s'opposer au passage du courant électrique. En conséquence, actuellement, pour raccorder des câbles en aluminium à des bornes en cuivre et lorsque la zone de raccordement est soumise aux intempéries et, notamment, à l'humidité, on soude des plages en cuivre à l'extrémité d'un fût en aluminium serti à l'extrémité de raccordement du câble. It is known that, when subjected to humidity, the contact surfaces of two assembled parts, respectively of aluminum and copper, are the seat of corrosion liable to oppose the passage of electric current. Consequently, at present, in order to connect aluminum cables to copper terminals and when the connection zone is subjected to the weather and, in particular, to humidity, copper pads are welded to the end of a barrel in aluminum crimped at the cable connection end.

Cette solution présente cependant le double inconvénient de néces situer l'application d'un vernis anti-corrosion sur la zone de soudure et de ne pas remédier à la fragilité des soudures cuivre/aluminium dont le risque de rupture est important. This solution however has the double disadvantage of néces locating the application of an anti-corrosion varnish on the weld zone and of not remedying the brittleness of copper / aluminum welds whose risk of rupture is significant.

Par ailleurs, il est reconnu que, comme toute surface de pièce en aluminium, les plages de raccordement des cosses en aluminium s'oxydent et se recouvrent d'alumine dont la conductibilité inférieure à celle de l'aluminium gêne le passage du courant électrique. Furthermore, it is recognized that, like any aluminum part surface, the connection pads of the aluminum lugs oxidize and become coated with alumina, the conductivity of which is lower than that of aluminum hinders the passage of electric current.

La présente invention vise à remédier à tous les inconvénients précités. A cet effet, elle concerne une rondelle destinée à être interposée entre les plages de raccordement de deux cosses et comprenant une âme centrale annulaire en une matière conductrice de l'éléctricité, tel qu'en métal, dont chaque face en bout présente des aspérités aptes à casser les couches éventuellement oxydées des plages de raccordement des cosses et qui est entièrement recouverte d'une enveloppe extérieure en une matière au moins légèrement élastique et électriquement isolante telle qu'une matière plastique moulable ou injectable, I'épaisseur de l'enveloppe recouvrant chaque aspérité de l'âme centrale étant déterminée en fonction de l'élasticité de sa matière constitutive, de manière que, lors du serrage de la rondelle entre les plages de raccordement des cosses, les aspérités de l'âme centrale non seulement traversent la matière isolante qui les recouvre mais aussi pénètrent, au moins partiellement, dans les plages de raccordement, I'enveloppe assurant, par suite de l'élasticité de sa matière constitutive, I'étanchéité des zones de contact entre les aspérités de l'amie centrale et les plages de raccordement des cosses.  The present invention aims to remedy all the aforementioned drawbacks. To this end, it relates to a washer intended to be interposed between the connection pads of two lugs and comprising an annular central core made of an electrically conductive material, such as metal, each end face having suitable asperities breaking the possibly oxidized layers of the connection pads of the lugs and which is entirely covered with an outer casing made of an at least slightly elastic and electrically insulating material such as a moldable or injectable plastic material, the thickness of the covering casing each roughness of the central core being determined as a function of the elasticity of its constituent material, so that, when the washer is tightened between the connection areas of the terminals, the roughness of the central core not only passes through the material insulating which covers them but also penetrates, at least partially, in the connection areas, the envelope ensuring, as a result of the elasticity of its constituent material, the sealing of the contact areas between the roughness of the central friend and the terminals of the terminals.

De toute façon, I'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, deux formes d'exécution de cette rondelle
Figure I en est une vue de face en élévation
Figure 2 en est une vue en coupe suivant ll-ll de figure I
Figure 3 montre, vu en coupe axiale, un raccordement entre deux câbles équipés d'une cosse réalisé avec interposition de larondelle de l'invention
Figure 4 est une vue similaire à figure I illustrant une variante d'exécution de cette rondelle.In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of nonlimiting examples, two embodiments of this washer
Figure I is a front view in elevation
Figure 2 is a sectional view along ll-ll of Figure I
Figure 3 shows, seen in axial section, a connection between two cables equipped with a terminal made with interposition of the washer of the invention
Figure 4 is a view similar to Figure I illustrating an alternative embodiment of this washer.

Comme le montre le dessin, la rondelle 2 selon l'invention est destinée à permettre une liaison électrique isolante et permanente entre les cosses 3 et 4 de deux câbles électriques 5 et 6. Cette rondelle comprend une âme centrale annulaire 2a en matériau dur et bon conducteur de l'électricité tel qu'en cuivre, alliage de cuivre ou autre métal approprié, recouverte d'une enveloppe extérieure 2b en matière élastique électriquement isolante, telle qu'une matière plastique moulable ou injectable. As shown in the drawing, the washer 2 according to the invention is intended to allow an insulating and permanent electrical connection between the lugs 3 and 4 of two electric cables 5 and 6. This washer comprises an annular central core 2a made of hard and good material conductor of electricity such as copper, copper alloy or other suitable metal, covered with an outer casing 2b of electrically insulating elastic material, such as a moldable or injectable plastic.

L'âme centrale annulaire 2a présente, sur chacune de ses faces, des aspérités 7 qui, dans les exemples illustrés sur le dessin, sont de section triangulaire aptes à former des sortes de couteaux. The annular central core 2a has, on each of its faces, asperities 7 which, in the examples illustrated in the drawing, are of triangular section capable of forming kinds of knives.

Dans l'exemple illustré sur les figures I à 3, les aspérités 7 sont disposées en arc de cercle, uniformément réparties autour de l'alésage central 8 de la rondelle 2, tandis que dans l'exemple illustré par la figure 4, elles sont disposées radialement par rapport à cet alésage central 8. In the example illustrated in FIGS. 1 to 3, the asperities 7 are arranged in an arc of a circle, uniformly distributed around the central bore 8 of the washer 2, while in the example illustrated in FIG. 4, they are arranged radially with respect to this central bore 8.

Comme le montre la figure 2, I'enveloppe isolante 2b présente, au-dessus de chaque aspérité 7, une épaisseur 9 dont la valeur est déterminée en fonction de l'élasticité de sa matière constitutive pour que, lors du serrage de la rondelle 2 entre les cosses 3 et 4 de deux câbles à raccorder 5 et 6, les aspérités 7 de son âme isolante 2a non seulement traversent la matière isolante de son enveloppe 2b mais, en outre, pénètrent, au moins partiellement, dans les plages de raccordement, respectivement 3a et 4a, des cosses 3 et 4, comme l'ilbJstre parfaitement la figure 3. As shown in FIG. 2, the insulating envelope 2b has, above each roughness 7, a thickness 9 whose value is determined as a function of the elasticity of its constituent material so that, when the washer 2 is tightened between the lugs 3 and 4 of two cables to be connected 5 and 6, the asperities 7 of its insulating core 2a not only pass through the insulating material of its envelope 2b but, moreover, penetrate, at least partially, into the connection areas, respectively 3a and 4a, lugs 3 and 4, as illustrated perfectly in FIG. 3.

Cette pénétration des aspérités dans les plages de raccordement 3a,4a des cosses 3 et 4 doit pouvoir se réaliser même si ces plages de raccordement sont revêtues d'une couche superficielle de métal oxydé, ce qui est le cas lorsqu'elles sont en aluminium. This penetration of the asperities in the connection areas 3a, 4a of the terminals 3 and 4 must be able to be achieved even if these connection areas are coated with a surface layer of oxidized metal, which is the case when they are made of aluminum.

Il faut noter que, lors du serrage de la rondelle 2 entre les cosses 3 et 4, I'enveloppe isolante 2b n'est perforée que dans les zones correspondant aux aspérités et qu'en dehors de ces zones, la matière plastique élastique la constituant, qui se trouve écrasée entre les plages 3a et 4a des cosses 3 et 4 et l'âme centrale 2a de la rondelle 2, assure l'étanchéité autour des zones perforées précitées. Les zones de contact, c'est-à-dire de liaison électrique entre les cosses 3 et 4 et l'âme centrale 2a de la rondelle 2, sont donc parfaitement tenues à l'abri de l'humidité et cela, de façon permanente. It should be noted that, during the tightening of the washer 2 between the lugs 3 and 4, the insulating envelope 2b is only perforated in the zones corresponding to the roughness and that outside these zones, the elastic plastic material constituting it , which is crushed between the areas 3a and 4a of the pods 3 and 4 and the central core 2a of the washer 2, provides sealing around the aforementioned perforated areas. The contact areas, that is to say the electrical connection between the lugs 3 and 4 and the central core 2a of the washer 2, are therefore perfectly protected from moisture and this, permanently .

La présence de la rondelle 2 évite donc de manière absolument sûre l'oxydation des surfaces de contact ainsi que leur corrosion éventuelle dans le cas où les cosses sont réalisées en métaux différents tels qu'en cuivre et aluminium. The presence of the washer 2 therefore absolutely prevents oxidation of the contact surfaces as well as their possible corrosion in the case where the lugs are made of different metals such as copper and aluminum.

II faut noter que, si on le désire, l'âme centrale 2a de la rondelle 2 peut être éventuellement réalisée avec un métal très dur mais mauvais conducteur de ltélectricité, recouvert d'un autre métal très bon conducteur de l'électricité. Cet autre métal peut être choisi de manière à limiter les différences de potentiel galvanique entrè les différents matériaux en présence.  It should be noted that, if desired, the central core 2a of the washer 2 can possibly be made with a very hard metal but a poor conductor of electricity, covered with another metal which is a very good conductor of electricity. This other metal can be chosen so as to limit the differences in galvanic potential between the different materials present.

Claims (2)

- REVENDICATIONS- CLAIMS 1.- Rondelle de raccordement électrique pour cosses en aluminium ou autre métal, caractérisée en ce que, destinée à être interposée entre les plages de raccordement (3a,4a) de deux cosses (3,4), elle comprend une âme centrale annulaire (2a) en une matière conductrice de l'éléctricité, tel qu'en métal, dont chaque face en bout présente des aspérités (7) aptes à casser les couches éventuellement oxydées des plages de raccordement (3a,4a) des cosses (3,4) et qui est entièrement recouverte d'une enveloppe extérieure (2b) en une matière au moins légèrement élastique et électriquement isolante telle qu'un matiere plastique moulable ou injectable, I'épaisseur de l'enveloppe (2b) recouvrant chaque aspérité de l'âme centrale (2a) étant déterminée, en fonction de l'élasticité de sa matière constitutive, de manière que, lors du serrage de la rondelle (2) entre les plages de raccordement (3a,4a) des cosses (3,4), les aspérités (7) de l'âme centrale (2a) non seulement traversent la matière isolante qui les recouvre mais aussi pénètrent, au moins partiellement, dans les plages de raccordement (3a,4a), I'enveloppe (2b) assurant, par suite de l'élasticité de sa matière constitutive, I'étanchéité des zones de contact entre les aspérités (7) de l'âme centrale (2a) et les plages de raccordement (3a,4a) des cosses (3,4). 1.- Electric connection washer for aluminum or other metal lugs, characterized in that, intended to be interposed between the connection pads (3a, 4a) of two lugs (3,4), it comprises an annular central core ( 2a) in an electrically conductive material, such as metal, each end face of which has asperities (7) capable of breaking the possibly oxidized layers of the connection pads (3a, 4a) of the terminals (3,4 ) and which is entirely covered with an outer envelope (2b) of an at least slightly elastic and electrically insulating material such as a moldable or injectable plastic, the thickness of the envelope (2b) covering each roughness of the central core (2a) being determined, as a function of the elasticity of its constituent material, so that, when the washer (2) is tightened between the connection pads (3a, 4a) of the lugs (3,4), the asperities (7) of the central core (2a) not only pass through the insulating material e which covers them but also penetrates, at least partially, into the connection areas (3a, 4a), the casing (2b) ensuring, as a result of the elasticity of its constituent material, the sealing of the contact zones between the asperities (7) of the central core (2a) and the connection areas (3a, 4a) of the lugs (3,4). 2.- Rondelle selon la revendication 1, caractérisée en ce que son âme centrale (2a) est réalisée en un métal très dur mais mauvais conducteur de l'électricité recouvert d'une couche d'un autre métal très bon conducteur de l'électricité.  2.- washer according to claim 1, characterized in that its central core (2a) is made of a very hard metal but poor conductor of electricity covered with a layer of another metal very good conductor of electricity .
FR8807045A 1988-05-17 1988-05-17 Electrical connection washer for lugs made of aluminium or other metal Pending FR2631746A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8807045A FR2631746A1 (en) 1988-05-17 1988-05-17 Electrical connection washer for lugs made of aluminium or other metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8807045A FR2631746A1 (en) 1988-05-17 1988-05-17 Electrical connection washer for lugs made of aluminium or other metal

Publications (1)

Publication Number Publication Date
FR2631746A1 true FR2631746A1 (en) 1989-11-24

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FR (1) FR2631746A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010148A1 (en) * 2011-02-02 2012-08-02 Franz Öller Electrically conductive and sealed connection structure of framed photovoltaic module, has module clamp that is screwed to substructure through anodized layer of module frame to obtain conductive connection between conductive elements
DE102014209259A1 (en) * 2014-05-15 2015-11-19 Airbus Operations Gmbh Contact gasket, electrical contact and method for contacting electrically conductive components
EP3264533A1 (en) * 2016-06-28 2018-01-03 Jean Müller GmbH Elektrotechnische Fabrik Breaker plate and its use in busbars of different materials connected with each other
CN108011250A (en) * 2017-12-10 2018-05-08 陈明山 A kind of power cable jointing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141550B1 (en) * 1971-08-19 1973-01-18 Karl Pfisterer Fabrik Elektrotechnischer Spezialartikel, 7000 Stuttgart Annular contact element
FR2369211A1 (en) * 1976-10-29 1978-05-26 Toyo Soda Mfg Co Ltd PROCESS FOR PREPARING A PHOSPHORIC ACID OF HIGH PURITY

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2141550B1 (en) * 1971-08-19 1973-01-18 Karl Pfisterer Fabrik Elektrotechnischer Spezialartikel, 7000 Stuttgart Annular contact element
FR2369211A1 (en) * 1976-10-29 1978-05-26 Toyo Soda Mfg Co Ltd PROCESS FOR PREPARING A PHOSPHORIC ACID OF HIGH PURITY

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010148A1 (en) * 2011-02-02 2012-08-02 Franz Öller Electrically conductive and sealed connection structure of framed photovoltaic module, has module clamp that is screwed to substructure through anodized layer of module frame to obtain conductive connection between conductive elements
DE102014209259A1 (en) * 2014-05-15 2015-11-19 Airbus Operations Gmbh Contact gasket, electrical contact and method for contacting electrically conductive components
EP3264533A1 (en) * 2016-06-28 2018-01-03 Jean Müller GmbH Elektrotechnische Fabrik Breaker plate and its use in busbars of different materials connected with each other
WO2018001954A1 (en) * 2016-06-28 2018-01-04 Jean Müller GmbH Elektrotechnische Fabrik Perforated disk, and use thereof in case of interconnected busbars made of different materials
CN108011250A (en) * 2017-12-10 2018-05-08 陈明山 A kind of power cable jointing

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