EP1650831B1 - Cable lug for an electrical connection comprising a reduced section - Google Patents

Cable lug for an electrical connection comprising a reduced section Download PDF

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Publication number
EP1650831B1
EP1650831B1 EP20050292060 EP05292060A EP1650831B1 EP 1650831 B1 EP1650831 B1 EP 1650831B1 EP 20050292060 EP20050292060 EP 20050292060 EP 05292060 A EP05292060 A EP 05292060A EP 1650831 B1 EP1650831 B1 EP 1650831B1
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EP
European Patent Office
Prior art keywords
piece
lug
section
lug according
flat portion
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.)
Not-in-force
Application number
EP20050292060
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German (de)
French (fr)
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EP1650831A1 (en
Inventor
Patrick Rivière
Alain Lascaux
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.)
Mecatraction SAS
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Mecatraction SAS
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Filing date
Publication date
Application filed by Mecatraction SAS filed Critical Mecatraction SAS
Publication of EP1650831A1 publication Critical patent/EP1650831A1/en
Application granted granted Critical
Publication of EP1650831B1 publication Critical patent/EP1650831B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H01R4/183—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

Definitions

  • the invention relates to the general field of electrical connection.
  • a lug for electrical connection comprising a tubular portion, a flat portion and a transition portion disposed between the flat portion and the tubular portion, the flat portion having a through hole for the rod of a terminal with which said lug is adapted to cooperate, said tubular portion being adapted to receive, in its hollow, the end of an electric cable.
  • This type of lug is common in many electrical applications, for example to connect a cable to a metal mass, the flat portion of the lug being screwed to a projecting terminal of this metal mass.
  • Such pods are known to be made from a metal tube, one end of which is flattened by a press.
  • the flattened end of this lug has a contact pad function whose thickness is formed by the assembly of two layers of metal foils pressed against each other by the press.
  • These two metal layers are formed from the wall of the metal tube which has been plastically deformed.
  • the passage hole for the rod of a terminal is practiced through this double metal layer.
  • the object of the invention is to improve this type of pod.
  • the terminal for electrical connection comprising a tubular portion, a flat portion and a transition portion disposed between the flat portion and the tubular portion, the flat portion having a passage hole for the stem of a terminal with which said lug is adapted to cooperate, said tubular portion being adapted to receive, in its hollow, the end of an electric cable, this lug being characterized in that said flat portion comprises a first section in which said hole is formed and a second section located between the first section and the portion of transition, with the second section being narrower and thicker than the first section.
  • Such a lug thus has, at the level of the first section, a contact area connected to the second section, itself connected to the transition portion which has a section allowing the passage from the flat shape of the second section to the circular section a crimping portion formed by the tubular portion of the pod.
  • This second section hereinafter referred to as "thinned section” has a flattened shape, as the contact area, but is not used for the electrical connection.
  • This pod thus has a section providing an additional function with respect to the crimping portion and the contact pad, this thinned section being nevertheless formed in the same way as the contact pad, by crushing.
  • the thinned section can be made by the same flattening process as for the contact area, the only difference being that at the level of the thinned section, the crushing is less important to simultaneously confer a greater thickness and a smaller width. relative to the contact area.
  • the thinned section may furthermore provide other additional functions, such as for example receiving a marking of the terminal.
  • the thinned section can indeed be engraved, printed or receive an adhesive marking or mechanically maintained, while not disturbing the electrical contact at the contact area.
  • the pod represented on the Figures 1 to 3 comprises a crimping portion 1 connected by a transition portion 2 to a flat portion 3.
  • the crimping portion 1 is tubular in shape and comprises a first cylindrical sealing section 4 and a second cylindrical connecting section 5 that is coaxial and of a diameter smaller than the sealing section 4.
  • the tubular wall forming the sealing section 4 has a thickness less than that of the branch section 5.
  • the crimping portion 1 thus has a cylindrical hollow whose shape reproduces the external shape of the crimping portion 1.
  • the flat portion 3 is formed of a first flat section forming a contact pad 6 and a second flat section forming a thinner section 7 in the width direction and having a thickness greater than the thickness of the contact area 6.
  • the transition portion 2 has a characteristic shape for connecting the flat shape of the thinned portion 7 to the cylindrical shape of the connecting portion 5 of the crimping portion 1.
  • the crimping portion 1 is thus adapted to receive a stripped electrical cable whose bare end of the conductor is inserted into the branch section 5 while the rest of the cable, provided with its insulator, extends into the sealing section 4.
  • the stretch of branch 5 is compressed on the conductor to allow electrical contact while the sealing section 4 is compressed on the cable insulation so that the assembly of the sealing section 4 and the cable is sealed.
  • the sealing section 4 can receive an O-ring disposed on its inner wall so as to enhance the sealing of the assembly of the sealing section 4 and the electrical cable connected to the lug.
  • the flat portion 3 As regards the flat portion 3, it consists of two layers of material pressed against each other. At the level of the contact area 6, the two layers of material are compressed more strongly than at the level of the thinned section 7, which explains the difference in thickness between these two sections 5, 7.
  • the pod of Figures 1 to 3 can be made from a metal tube whose cylindrical wall has a diameter and a thickness corresponding to the branch section 5 visible on the figure 2 .
  • This metal tube is first of all plastically deformed at one of its ends by means of a pin inserted in the tube, which makes it possible to form the sealing section 4 which has a greater diameter than the connection section 5.
  • the crimping portion 1 is thus made.
  • the terminal is then placed in a press and a die flatten the area of the metal cylinder which corresponds to the flat portion 3.
  • the matrix used for this purpose comprises two jaws adapted to simultaneously crush the metal tube so that the flat portion 3 is arranged along the longitudinal axis of the crimping portion 1 so that the terminal is symmetrical with respect to the plane in which the flat portion 3 extends (see figure 2 ).
  • the two jaws of the matrix are shaped so as to have a first planar surface intended to form the contact pad 6 and to have a second planar surface set back from the previous one, that is to say a vertical drop is present between these two planar surfaces of each jaw of the matrix, to form the thinned section 7.
  • An additional operation may be to coat the entire lug, or just the contact pad 6, with a conductive coating, for example copper or tin plating.
  • the thinned section 7 can also receive a marking (not shown) to identify the lug (not shown), this marking does not interfere with the contact pad 6.
  • FIGS. 4 and 5 illustrate an example of a pod mounting environment previously described.
  • the figure 4 is a view of the lug threaded on the threaded rod 11 of an electrical connection terminal. This figure shows the cooperation of the terminal with arms 8 ensuring its maintenance in rotation.
  • the figure 5 is a longitudinal sectional view of the assembly of the figure 4 after a nut 10 has been screwed onto the threaded rod 11 and tightened on the contact pad 6.
  • the threaded rod 11 belongs to a connection terminal 12 provided with a support flange 13 adapted to receive the lower face of the contact pad 6.
  • the contact pad 6 can thus be clamped between the support flange 13 and the nut 10 so that the electrical contact is ensured between the terminal 12 and the lug.
  • the figure 5 also shows the arrangement of an anti-rotation ring 9 made of an insulating material.
  • the arms 8 protrude vertically from this ring 9.
  • This arrangement makes it possible to prevent the rotation of the terminal around the threaded rod 11 during the tightening of the nut 10.
  • This rotational stop is ensured by the arms 8 which are separated by a distance substantially corresponding to the width of the section thinned 7, that is to say a distance less than the width of the contact pad 6.
  • the arrangement of the flat portion 3 with respect to the crimping portion 1 may be different, for example asymmetrical.
  • the flat portion 3 can be made from processes other than that described, for example by molding, stamping, spinning or sintering.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Description

L'invention a trait au domaine général de la connectique électrique.The invention relates to the general field of electrical connection.

Elle concerne plus particulièrement une cosse pour connexion électrique, comportant une portion tubulaire, une portion plate et une portion de transition disposée entre la portion plate et la portion tubulaire, la portion plate présentant un trou de passage pour la tige d'une borne avec laquelle ladite cosse est adaptée à coopérer, ladite portion tubulaire étant prévue pour recevoir, dans son creux, l'extrémité d'un câble électrique.It relates more particularly to a lug for electrical connection, comprising a tubular portion, a flat portion and a transition portion disposed between the flat portion and the tubular portion, the flat portion having a through hole for the rod of a terminal with which said lug is adapted to cooperate, said tubular portion being adapted to receive, in its hollow, the end of an electric cable.

Ce type de cosse est courant dans de nombreuses applications électriques, par exemple pour connecter un câble à une masse métallique, la portion plate de la cosse étant vissée sur une borne saillante de cette masse métallique.This type of lug is common in many electrical applications, for example to connect a cable to a metal mass, the flat portion of the lug being screwed to a projecting terminal of this metal mass.

On connaît de telles cosses réalisées à partir d'un tube métallique dont une extrémité est aplatie par une presse.Such pods are known to be made from a metal tube, one end of which is flattened by a press.

L'extrémité aplatie de cette cosse a une fonction de plage de contact dont l'épaisseur est formée par l'assemblage de deux couches de feuilles métalliques pressées l'une contre l'autre par la presse.The flattened end of this lug has a contact pad function whose thickness is formed by the assembly of two layers of metal foils pressed against each other by the press.

Ces deux couches métalliques sont formées de la paroi du tube métallique qui a été plastiquement déformée. Le trou de passage pour la tige d'une borne est pratiqué à travers cette double couche métallique.These two metal layers are formed from the wall of the metal tube which has been plastically deformed. The passage hole for the rod of a terminal is practiced through this double metal layer.

Par ailleurs, le document FR 2044903 décrit une cosse pour connexion électrique selon le préambule de la revendication 1.In addition, the document FR 2044903 discloses a terminal for electrical connection according to the preamble of claim 1.

Le but de l'invention est d'améliorer ce type de cosse.The object of the invention is to improve this type of pod.

A cet effet, la cosse pour connexion électrique, comportant une portion tubulaire, une portion plate et une portion de transition disposée entre la portion plate et la portion tubulaire, la portion plate présentant un trou de passage pour la tige d'une borne avec laquelle ladite cosse est adaptée à coopérer, ladite portion tubulaire étant prévue pour recevoir, dans son creux, l'extrémité d'un câble électrique ;cette cosse étant caractérisée en ce que ladite portion plate comporte un premier tronçon dans lequel est ménagé ledit trou et un deuxième tronçon disposé entre le premier tronçon et la portion de transition, avec le deuxième tronçon qui est moins large et plus épais que le premier tronçon.For this purpose, the terminal for electrical connection, comprising a tubular portion, a flat portion and a transition portion disposed between the flat portion and the tubular portion, the flat portion having a passage hole for the stem of a terminal with which said lug is adapted to cooperate, said tubular portion being adapted to receive, in its hollow, the end of an electric cable, this lug being characterized in that said flat portion comprises a first section in which said hole is formed and a second section located between the first section and the portion of transition, with the second section being narrower and thicker than the first section.

Une telle cosse présente donc, au niveau du premier tronçon, une plage de contact reliée au deuxième tronçon, lui-même relié à la portion de transition qui présente une section permettant le passage de la forme plate du deuxième tronçon à la forme à section circulaire d'une portion de sertissage formée par la portion tubulaire de la cosse.Such a lug thus has, at the level of the first section, a contact area connected to the second section, itself connected to the transition portion which has a section allowing the passage from the flat shape of the second section to the circular section a crimping portion formed by the tubular portion of the pod.

Ce deuxième tronçon, ci-après dénommé "tronçon aminci" présente une forme aplatie, comme la plage de contact, mais n'est pas employé pour la connexion électrique.This second section, hereinafter referred to as "thinned section" has a flattened shape, as the contact area, but is not used for the electrical connection.

Cette cosse dispose ainsi d'un tronçon assurant une fonction supplémentaire par rapport à la portion de sertissage et à la plage de contact, ce tronçon aminci étant néanmoins formé de la même manière que la plage de contact, par écrasement.This pod thus has a section providing an additional function with respect to the crimping portion and the contact pad, this thinned section being nevertheless formed in the same way as the contact pad, by crushing.

Dans de nombreuses applications mettant en jeu des cosses, il est nécessaire de bloquer la rotation de la cosse lors du serrage d'un écrou sur la tige filetée d'une borne qui traverse le trou de passage de la plage de contact. Le frottement de l'écrou sur la plage de contact selon un mouvement circulaire a tendance à faire pivoter la cosse autour de la tige de la borne. Le tronçon aminci peut alors être mis à profit en coopération avec des organes de blocage latéraux écartés d'une distance inférieure à la largeur de la plage de contact et entre lesquels peut être insérée la cosse au niveau de ce tronçon aminci. Il est en effet courant, pour des raisons d'encombrement latéral notamment lorsque plusieurs cosses sont disposées en étoile sur une même borne, que l'espace disponible sur les côtés de la cosse ne permette l'agencement que de tels organes de blocage latéraux à l'écartement inférieur à la plage de contact.In many applications involving lugs, it is necessary to block the rotation of the lug when tightening a nut on the threaded rod of a terminal which passes through the hole of passage of the contact pad. The friction of the nut on the contact pad in a circular motion tends to rotate the pod around the terminal rod. The thinned section can then be used in cooperation with lateral locking members spaced apart by a distance less than the width of the contact area and between which can be inserted the terminal at this thinned section. It is indeed common, for reasons of lateral space in particular when several lugs are arranged in a star on the same terminal, that the space available on the sides of the lug allows the arrangement that such lateral locking members to the distance below the contact area.

Le tronçon aminci peut être réalisé par le même procédé d'aplatissement que pour la plage de contact, la seule différence étant qu'au niveau du tronçon aminci, l'écrasement est moins important pour conférer simultanément une épaisseur plus importante et une largeur moins importante par rapport à la plage de contact.The thinned section can be made by the same flattening process as for the contact area, the only difference being that at the level of the thinned section, the crushing is less important to simultaneously confer a greater thickness and a smaller width. relative to the contact area.

Le coût d'obtention d'une telle cosse est par conséquent sensiblement le même que celui d'une cosse de l'art antérieur, bien qu'elle présente une fonctionnalité supplémentaire.The cost of obtaining such a pod is therefore substantially the same as that of a pod of the prior art, although it has an additional functionality.

Le tronçon aminci peut de plus assurer d'autres fonctions supplémentaires, comme par exemple recevoir un marquage de la cosse. Le tronçon aminci peut en effet être gravé, imprimé ou encore recevoir un marquage adhésif ou mécaniquement maintenu, tout en ne perturbant pas le contact électrique au niveau de la plage de contact.The thinned section may furthermore provide other additional functions, such as for example receiving a marking of the terminal. The thinned section can indeed be engraved, printed or receive an adhesive marking or mechanically maintained, while not disturbing the electrical contact at the contact area.

La cosse selon l'invention peut en outre comporter les caractéristiques préférées suivantes, seules ou en combinaison :

  • les valeurs des sections respectives du premier tronçon et du deuxième tronçon sont sensiblement égales ;
  • le premier tronçon et le deuxième tronçon sont formés de deux couches de matériau conducteur pressées l'une contre l'autre ;
  • le premier tronçon et le deuxième tronçon sont dans le prolongement l'un de l'autre ;
  • la cosse est symétrique par rapport au plan dans lequel s'étendent le premier tronçon et le deuxième tronçon ;
  • les tranches latérales du deuxième tronçon présentent chacune une surface sensiblement plane ;
  • l'épaisseur du deuxième tronçon est inférieure au double de l'épaisseur de la paroi cylindrique formant ladite portion tubulaire ;
  • le deuxième tronçon présente sur sa surface un marquage d'identification ;
  • la cosse comporte un tronçon d'étanchéité tubulaire rattaché à la portion tubulaire et s'étendant le long du même axe longitudinal, dans la direction opposée à la portion plate, le tronçon d'étanchéité ayant un diamètre supérieur à la portion tubulaire ;
  • le tronçon d'étanchéité comporte un joint d'étanchéité sur la surface interne de sa paroi cylindrique ;
  • la cosse comporte un revêtement conducteur sur au moins une partie de sa surface.
The terminal according to the invention may further comprise the following preferred features, alone or in combination:
  • the values of the respective sections of the first section and the second section are substantially equal;
  • the first section and the second section are formed of two layers of conductive material pressed against each other;
  • the first section and the second section are in line with one another;
  • the pod is symmetrical with respect to the plane in which extend the first section and the second section;
  • the lateral edges of the second section each have a substantially flat surface;
  • the thickness of the second section is less than twice the thickness of the cylindrical wall forming said tubular portion;
  • the second section has on its surface an identification marking;
  • the lug comprises a tubular sealing section attached to the tubular portion and extending along the same longitudinal axis, in the opposite direction to the flat portion, the sealing section having a diameter greater than the tubular portion;
  • the sealing section comprises a seal on the inner surface of its cylindrical wall;
  • the lug has a conductive coating on at least a portion of its surface.

D'autres caractéristiques et avantages de l'invention apparaissent à la lumière de la description qui va suivre d'un mode de réalisation préféré donné à titre d'exemple non limitatif, description faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue de dessus d'une cosse selon l'invention ;
  • la figure 2 est une vue selon la coupe II-II de la figure 1;
  • la figure 3 est une vue en perspective de la cosse de la figure 1 ;
  • la figure 4 est une vue partielle de dessus de la cosse de la figure 1 mise en position dans un dispositif anti-rotation ;
  • la figure 5 est une vue en coupe longitudinale du montage de la figure 4, la cosse étant connectée à une borne.
Other features and advantages of the invention appear in the light of the description which follows of a preferred embodiment given by way of non-limiting example, description made with reference to the accompanying drawings in which:
  • the figure 1 is a top view of a terminal according to the invention;
  • the figure 2 is a view according to section II-II of the figure 1 ;
  • the figure 3 is a perspective view of the pod of the figure 1 ;
  • the figure 4 is a partial view from above of the pod of the figure 1 positioning in an anti-rotation device;
  • the figure 5 is a longitudinal sectional view of the assembly of the figure 4 , the pod being connected to a terminal.

La cosse représentée sur les figures 1 à 3 comporte une portion de sertissage 1 reliée par une portion de transition 2 à une portion plate 3.The pod represented on the Figures 1 to 3 comprises a crimping portion 1 connected by a transition portion 2 to a flat portion 3.

La portion de sertissage 1 est de forme tubulaire et comporte un premier tronçon cylindrique 4 d'étanchéité ainsi qu'un deuxième tronçon cylindrique de branchement 5 coaxial et d'un diamètre inférieur au tronçon d'étanchéité 4.The crimping portion 1 is tubular in shape and comprises a first cylindrical sealing section 4 and a second cylindrical connecting section 5 that is coaxial and of a diameter smaller than the sealing section 4.

La paroi tubulaire formant le tronçon d'étanchéité 4 a une épaisseur inférieure à celle du tronçon de branchement 5. La portion de sertissage 1 présente ainsi un creux cylindrique dont la forme reproduit la forme externe de la portion de sertissage 1.The tubular wall forming the sealing section 4 has a thickness less than that of the branch section 5. The crimping portion 1 thus has a cylindrical hollow whose shape reproduces the external shape of the crimping portion 1.

La portion plate 3 est quant à elle formée d'un premier tronçon plat formant une plage de contact 6 et d'un deuxième tronçon plat formant un tronçon aminci 7 dans le sens de la largeur et présentant une épaisseur supérieure à l'épaisseur de la plage de contact 6.The flat portion 3 is formed of a first flat section forming a contact pad 6 and a second flat section forming a thinner section 7 in the width direction and having a thickness greater than the thickness of the contact area 6.

La portion de transition 2 a une forme caractéristique permettant de relier la forme plate du tronçon aminci 7 à la forme cylindrique du tronçon de branchement 5 de la portion de sertissage 1.The transition portion 2 has a characteristic shape for connecting the flat shape of the thinned portion 7 to the cylindrical shape of the connecting portion 5 of the crimping portion 1.

La portion de sertissage 1 est ainsi adaptée à recevoir un câble électrique dénudé dont l'extrémité nue du conducteur est insérée dans le tronçon de branchement 5 tandis que le reste du câble, muni de son isolant, s'étend dans le tronçon d'étanchéité 4. Lors du sertissage, le tronçon de branchement 5 est comprimé sur le conducteur pour permettre le contact électrique tandis que le tronçon d'étanchéité 4 est comprimé sur l'isolant du câble de manière que l'assemblage du tronçon d'étanchéité 4 et du câble soit étanche.The crimping portion 1 is thus adapted to receive a stripped electrical cable whose bare end of the conductor is inserted into the branch section 5 while the rest of the cable, provided with its insulator, extends into the sealing section 4. When crimping, the stretch of branch 5 is compressed on the conductor to allow electrical contact while the sealing section 4 is compressed on the cable insulation so that the assembly of the sealing section 4 and the cable is sealed.

En variante, le tronçon d'étanchéité 4 peut recevoir un joint torique disposé sur sa paroi interne de sorte à renforcer l'étanchéité de l'assemblage du tronçon d'étanchéité 4 et du câble électrique connecté à la cosse.Alternatively, the sealing section 4 can receive an O-ring disposed on its inner wall so as to enhance the sealing of the assembly of the sealing section 4 and the electrical cable connected to the lug.

En ce qui concerne la portion plate 3, celle-ci est constituée de deux couches de matériau pressées l'une contre l'autre. Au niveau de la plage de contact 6, les deux couches de matériau sont comprimées plus fortement qu'au niveau du tronçon aminci 7, ce qui explique la différence d'épaisseur entre ces deux tronçons 5, 7.As regards the flat portion 3, it consists of two layers of material pressed against each other. At the level of the contact area 6, the two layers of material are compressed more strongly than at the level of the thinned section 7, which explains the difference in thickness between these two sections 5, 7.

La cosse des figures 1 à 3 peut être réalisée à partir d'un tube métallique dont la paroi cylindrique a un diamètre et une épaisseur correspondant au tronçon de branchement 5 visible sur la figure 2.The pod of Figures 1 to 3 can be made from a metal tube whose cylindrical wall has a diameter and a thickness corresponding to the branch section 5 visible on the figure 2 .

Ce tube métallique est tout d'abord déformé plastiquement à l'une de ses extrémités à l'aide d'une broche insérée dans le tube, ce qui permet de former le tronçon d'étanchéité 4 qui présente un diamètre supérieur au tronçon de branchement 5. La portion de sertissage 1 est ainsi dès lors réalisée.This metal tube is first of all plastically deformed at one of its ends by means of a pin inserted in the tube, which makes it possible to form the sealing section 4 which has a greater diameter than the connection section 5. The crimping portion 1 is thus made.

La cosse est ensuite disposée dans une presse et une matrice vient aplatir la zone du cylindre métallique qui correspond à la portion plate 3. La matrice employée à cet effet comporte deux mâchoires adaptées à écraser simultanément le tube métallique pour que la portion plate 3 soit disposée le long de l'axe longitudinal de la portion de sertissage 1 de manière que la cosse soit symétrique par rapport au plan dans lequel s'étend la portion plate 3 (voir figure 2).The terminal is then placed in a press and a die flatten the area of the metal cylinder which corresponds to the flat portion 3. The matrix used for this purpose comprises two jaws adapted to simultaneously crush the metal tube so that the flat portion 3 is arranged along the longitudinal axis of the crimping portion 1 so that the terminal is symmetrical with respect to the plane in which the flat portion 3 extends (see figure 2 ).

Les deux mâchoires de la matrice sont conformées de manière à présenter une première surface plane destinée à former la plage de contact 6 et à présenter une deuxième surface plane en retrait par rapport à la précédente, c'est-à-dire qu'un dénivelé est présent entre ces deux surfaces planes de chaque mâchoire de la matrice, pour former le tronçon aminci 7.The two jaws of the matrix are shaped so as to have a first planar surface intended to form the contact pad 6 and to have a second planar surface set back from the previous one, that is to say a vertical drop is present between these two planar surfaces of each jaw of the matrix, to form the thinned section 7.

Lors de l'écrasement de cette portion du tube métallique initial, le tronçon correspondant à la plage de contact 6 subit de ce fait un aplatissement plus important que le tronçon aminci 7, ce qui conduit à une plage de contact 6 plus fine mais plus large que le tronçon aminci 7.During the crushing of this portion of the initial metal tube, the portion corresponding to the contact pad 6 thereby undergoes a greater flattening than the thinned section 7, which leads to a contact area 6 thinner but wider that the thinned section 7.

Une opération supplémentaire peut consister à revêtir l'ensemble de la cosse, ou juste la plage de contact 6, d'un revêtement conducteur, par exemple un placage de cuivre ou d'étain.An additional operation may be to coat the entire lug, or just the contact pad 6, with a conductive coating, for example copper or tin plating.

Le tronçon aminci 7 peut de plus recevoir un marquage (non représenté) permettant d'identifier la cosse (non représentée), ce marquage n'interférant pas avec la plage de contact 6.The thinned section 7 can also receive a marking (not shown) to identify the lug (not shown), this marking does not interfere with the contact pad 6.

Les figures 4 et 5 illustrent un exemple d'environnement de montage de la cosse précédemment décrite.The Figures 4 and 5 illustrate an example of a pod mounting environment previously described.

La figure 4 est une vue dessus de la cosse enfilée sur la tige filetée 11 d'une borne de connexion électrique. Cette figure montre la coopération de la cosse avec des bras 8 assurant son maintien en rotation.The figure 4 is a view of the lug threaded on the threaded rod 11 of an electrical connection terminal. This figure shows the cooperation of the terminal with arms 8 ensuring its maintenance in rotation.

La figure 5 est une vue en coupe longitudinale du montage de la figure 4 après qu'un écrou 10 ait été vissé sur la tige filetée 11 et serré sur la plage de contact 6.The figure 5 is a longitudinal sectional view of the assembly of the figure 4 after a nut 10 has been screwed onto the threaded rod 11 and tightened on the contact pad 6.

La tige filetée 11 appartient à une borne de connexion 12 munie d'une collerette de support 13 adaptée à recevoir la face inférieure de la plage de contact 6.The threaded rod 11 belongs to a connection terminal 12 provided with a support flange 13 adapted to receive the lower face of the contact pad 6.

La plage de contact 6 peut ainsi être serrée entre la collerette de support 13 et l'écrou 10 de manière que le contact électrique soit assuré entre la borne 12 et la cosse.The contact pad 6 can thus be clamped between the support flange 13 and the nut 10 so that the electrical contact is ensured between the terminal 12 and the lug.

La figure 5 montre également la disposition d'une couronne anti-rotation 9 constituée d'un matériau isolant. Les bras 8 sont saillants verticalement de cette couronne 9.The figure 5 also shows the arrangement of an anti-rotation ring 9 made of an insulating material. The arms 8 protrude vertically from this ring 9.

Ce montage permet d'empêcher la rotation de la cosse autour de la tige filetée 11 lors du serrage de l'écrou 10. Cet arrêt en rotation est assuré par les bras 8 qui sont séparés d'une distance correspondant sensiblement à la largeur du tronçon aminci 7, c'est-à-dire une distance inférieure à la largeur de la plage de contact 6.This arrangement makes it possible to prevent the rotation of the terminal around the threaded rod 11 during the tightening of the nut 10. This rotational stop is ensured by the arms 8 which are separated by a distance substantially corresponding to the width of the section thinned 7, that is to say a distance less than the width of the contact pad 6.

Des variantes de réalisation du dispositif peuvent être envisagées sans pour autant sortir du cadre de l'invention. Notamment, l'agencement de la portion plate 3 par rapport à la portion de sertissage 1 peut être différent, par exemple asymétrique.Alternative embodiments of the device can be envisaged without departing from the scope of the invention. In particular, the arrangement of the flat portion 3 with respect to the crimping portion 1 may be different, for example asymmetrical.

Par ailleurs, la portion plate 3 peut être réalisée à partir de procédés autres que celui décrit, par exemple par moulage, matriçage, filage ou frittage.Furthermore, the flat portion 3 can be made from processes other than that described, for example by molding, stamping, spinning or sintering.

Claims (12)

  1. A lug for electrical connection, comprising a tubular portion (5), a flat portion (3) and a transition portion (2) arranged between the flat portion (3) and the tubular portion (5), the flat portion (3) having a passage hole for the post (11) of a terminal (12) with which said lug is suitable for cooperating, said tubular portion (5) being provided to receive the end of an electrical cable in its cavity; said lug being characterised in that said flat portion (3) comprises a first piece (6) in which said hole is formed and a second piece (7) arranged between the first piece (6) and the transition portion (2), with the second piece (7) being less wide and thicker than the first piece (6).
  2. A lug according to claim 1, characterised in that the values of the respective cross-sections of the first piece (6) and of the second piece (7) are substantially equal.
  3. A lug according to one of claims 1 and 2, characterised in that the first piece (6) and the second piece (7) are formed of two layers of conductive material pressed one against the other.
  4. A lug according to one of claims 1 to 3, characterised in that the first piece (6) and the second piece (7) are an extension one of the other.
  5. A lug according to claim 4, characterised in that it is symmetrical relative to the plane in which extend the first piece (6) and the second piece (7).
  6. A lug according to one of claims 1 to 5, characterised in that the side edges of the second piece (7) each have a substantially planar surface.
  7. A lug according to one of claims 1 to 6, characterised in that the thickness of the second piece (7) is less than double the thickness of the cylindrical wall forming said tubular portion (5).
  8. A lug according to one of claims 1 to 7, characterised in that the second piece (7) has identification marking on its surface.
  9. A lug according to one of claims 1 to 8, characterised in that it comprises a tubular sealing piece (4) attached to the tubular portion (5) and extending along the same longitudinal axis, in the opposite direction from the flat portion (3), the sealing piece having a diameter greater than the tubular portion (5).
  10. A lug according to claim 9, characterised in that the sealing piece (4) comprises a gasket on the inner surface of its cylindrical wall.
  11. A lug according to one of claims 1 to 10, characterised in that it comprises a conductive coating on at least part of its surface.
  12. A lug according to one of claims 1 to 11, characterised in that it is suitable for being made from a metal tube, one end portion of which is flattened by a press to form said flat portion (3).
EP20050292060 2004-10-22 2005-10-04 Cable lug for an electrical connection comprising a reduced section Not-in-force EP1650831B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0411318A FR2877149B1 (en) 2004-10-22 2004-10-22 TERMINAL FOR ELECTRICAL CONNECTION COMPRISING AN AMINCI STRING

Publications (2)

Publication Number Publication Date
EP1650831A1 EP1650831A1 (en) 2006-04-26
EP1650831B1 true EP1650831B1 (en) 2013-08-21

Family

ID=34950414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050292060 Not-in-force EP1650831B1 (en) 2004-10-22 2005-10-04 Cable lug for an electrical connection comprising a reduced section

Country Status (3)

Country Link
EP (1) EP1650831B1 (en)
ES (1) ES2434392T3 (en)
FR (1) FR2877149B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2995458B1 (en) * 2012-09-07 2014-10-10 Mecatraction METHOD FOR MANUFACTURING A CONNECTING DEVICE FOR CRIMPING ON A TERMINAL STRIP DENUDE OF ELECTRIC CABLE AND SUCH DEVICE FOR CONNECTING
CN108808349B (en) * 2017-05-04 2023-12-22 江苏嘉盟电力设备有限公司 Oil blocking power connector and manufacturing method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2044903A5 (en) * 1969-05-16 1971-02-26 Francelco Sa
GB1566554A (en) * 1976-10-07 1980-05-08 Post Office Electrical connectors
US4947568A (en) * 1988-12-14 1990-08-14 Alfredo De Barbieri Wire identification device
US5167066A (en) * 1991-08-08 1992-12-01 Mize & Co., Inc. Method for producing an insulated electrical connector
GB9918991D0 (en) * 1999-08-12 1999-10-13 Apw Electronics Ltd Electrical conductivity connectors
FR2858121B1 (en) * 2003-05-28 2006-01-27 Valeo Equip Electr Moteur ARRANGEMENT FOR FASTENING A CONNECTING TERMINAL TO A CURRENT SOCKET TERMINAL ATTACHED TO THE RECTIFIER DEVICE OF A ROTATING ELECTRIC MACHINE

Also Published As

Publication number Publication date
EP1650831A1 (en) 2006-04-26
FR2877149A1 (en) 2006-04-28
ES2434392T3 (en) 2013-12-16
FR2877149B1 (en) 2013-01-11

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