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EP2518831B1 - Connecting sleeve for electrical cables - Google Patents

Connecting sleeve for electrical cables Download PDF

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Publication number
EP2518831B1
EP2518831B1 EP12165368.7A EP12165368A EP2518831B1 EP 2518831 B1 EP2518831 B1 EP 2518831B1 EP 12165368 A EP12165368 A EP 12165368A EP 2518831 B1 EP2518831 B1 EP 2518831B1
Authority
EP
European Patent Office
Prior art keywords
groove
anchoring
blade
sleeve
sleeve according
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
EP12165368.7A
Other languages
German (de)
French (fr)
Other versions
EP2518831A1 (en
Inventor
Xavier Joseph Souche
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.)
Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
Original Assignee
Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
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.)
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Publication date
Application filed by Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS filed Critical Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
Publication of EP2518831A1 publication Critical patent/EP2518831A1/en
Application granted granted Critical
Publication of EP2518831B1 publication Critical patent/EP2518831B1/en
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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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw
    • 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
    • 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
    • H01R4/26—Connections in which at least one of the connecting parts has projections which bite into or engage the other connecting part in order to improve the contact

Definitions

  • the invention relates to connection sleeves for electric cables.
  • the invention aims to provide a similar connecting sleeve that is simple, convenient and economical.
  • the sleeve according to the invention offers excellent mechanical strength of the cables, including during the temperature changes thereof. .
  • the diameter of the internal cavity is greater than that of the cable, at least the height of the teeth, which leaves a relatively large place.
  • the sleeve according to the invention offers excellent quality of electrical connection and mechanical connection.
  • the grooves of the sleeve body according to the invention having a single section, the sleeve according to the invention, although it comprises more blades than the aforementioned sleeve, is simple, convenient and economical to manufacture.
  • connection sleeve 1 comprising a body 2 and four clamping screws 5.
  • the sleeve 1 is traversed by a longitudinal bore 3 extending from a first orifice 11a to a second orifice 11b.
  • Four threads 4 open radially on the one hand in this longitudinal bore 3 on the inner surface 9 of the sleeve body 2, on the other hand on the outer surface 10. These threads 4 are parallel to each other in a direction 6.
  • the four screws 5 are each engaged in a respective tapping 4.
  • three longitudinal grooves 12 of rectangular section are formed in the sleeve body 2. They open into the longitudinal bore 3, facing the clamping screws 5.
  • Each of the grooves 12 houses an anchor blade 14.
  • the three anchor blades 14 are identical.
  • Each blade 14 is of length slightly less than the length of the sleeve body 2.
  • the body 2 is rigid in the vicinity of the grooves.
  • each anchoring blade 14 comprises a sill 7.
  • the section of the sill 7 is rectangular and complementary to the section of the groove 12 corresponding.
  • Protruding from one side 15 of the sill 7, visible at the top of the anchoring blades 14 on the Figures 2 to 7 are anchoring teeth 16.
  • These anchor teeth 16 are oriented transversely to the longitudinal direction 8, are of triangular section and here all have the same height.
  • the anchoring blades 14 comprise in their middle part two lugs 17, here of rectangular section.
  • a partition 13 is housed therebetween.
  • the partition 13 is in the form of a slab of small height and section slightly smaller than that of the section of the longitudinal bore 3.
  • the longitudinal bore 3 is thus separated into two cavities 3a, 3b.
  • a first face 13a of the partition 13 forms the bottom of the first cavity 3a, the second face 13b forming the bottom of the second cavity 3b.
  • two of the four threads 4 open into the first cavity 3a, the other two threads 4 open into the second cavity 3b.
  • the figure 6 shows in detail the geometry of the part of the sleeve 1 in which are the anchoring blades 14.
  • the grooves 12 are parallel to each other.
  • the anchoring blades 14 are therefore also parallel to each other.
  • the anchoring blade 14 located in the center is directly aligned with the threads 4.
  • the outer anchor blades 14 are disposed on both sides and at equal distance from the anchoring blade 14 located in the center.
  • This crimping operation is carried out using a punch with tapered end. Punching is done on the end portion of the sleeve body 2 located between the anchoring blades 14, and on both sides external anchor blades 14. The material tongues 19 thus formed hold the anchor blades 14 in place.
  • the material languages 19 as well as the marks 20 left by the punch marks are represented at the figure 7 (not shown in the other figures for the sake of simplicity).
  • the electrical cables 30 to be connected are of the type comprising a conductor core formed of strands. If they have a coating of insulating material, the electrical cables 30 are stripped on their portion to be inserted into the sleeve 1. For simplicity, the strands are not shown in the drawings.
  • first electrical cable 30 is inserted into the first cavity 3a and one end of a second electrical cable 30 into the second cavity 3b.
  • the electric cables 30 are pressed against the anchoring teeth 16. These then penetrate between the strands of the conductive core.
  • the clamping screws 5 are of the self-breaking type, that is to say that the head of these clamping screws 5 breaks automatically when a predetermined tightening torque is reached. This makes it possible at the same time to avoid tightening too tightly the cables to be connected, such as the cables 30, and to make the connection between the cables 30 operated by the sleeve 1 inviolable.
  • the anchoring blades 14 serve both to electrically connect the two cables 30 inserted in the connecting sleeve 1 and to immobilize them mechanically.
  • transverse orientation of the teeth offers excellent resistance to pull-out, which makes it possible to use the sleeve 1 at a time to make an electrical connection and a mechanical connection, for example for overhead or underground cables. a distribution network of electricity.
  • the anchoring teeth 16 have a height of between 0.3 and 1.5 mm; and preferably between 0.6 and 0.8 mm because this last range corresponds to about 1/3 to 2/3 of the diameter of the strands of the electric cables conventionally used in the electricity distribution networks.
  • the electrical cables 30 allowed in the sleeve 1 may have a diameter less than or equal to the diameter of a circle 31, visible at the figure 6 passing through the top of the anchoring teeth 16. After tightening, an electric cable 30 of the maximum permissible diameter will be pressed against the inner surface 9 and will marry the contour.
  • the crimping operation aims to keep the anchoring blades 14 in the sleeve body 2 essentially during transport and handling. Once the electrical cables 30 are mounted, it is the tightening by the screws 5 which operates the anchoring of the electric cables 30 in the sleeve 1.
  • the sleeve body 2 having the bore 3 and the grooves 12 is firstly drawn by spinning.
  • the threads 4 are machined in a second step.
  • the sleeve 1 is made of aluminum.
  • the anchoring blades 14 are sheared in a brass strip a few millimeters thick.
  • the variant of the sleeve 1 illustrated on the figure 8 is identical to the embodiment illustrated on the Figures 1 to 7 except that the outer grooves 12 are oriented towards the center of the longitudinal bore 3 at an angle to the centrally located groove 12.
  • the inclination of the outer blades 14 makes it possible to orient the edge of the teeth 16 of these outer blades 14 along the circle 31.
  • the variant of the sleeve 1 illustrated on the figure 9 is identical to the embodiment illustrated on the Figures 1 to 7 except that the centrally located blade 14 is removed.
  • the two remaining blades 14 are evenly distributed on either side of the screws 5.
  • the distance from the top of the teeth 16 to the screws 5 is identical for each of the This is favorable to a balanced cooperation of the cables 30 with the blades 14.
  • the sleeve comprises another pair of blades 14, also arranged in a balanced manner, that is to say that each blade 14 of this additional torque is disposed in the body 2 in mirror image of the other blade 14 of this pair.
  • anchor blades there are two or four anchor blades arranged homogeneously but, instead of being arranged in the same orientation as the screws 5, the anchoring blades are arranged inclined as the outer blades of the variant illustrated on the figure 8 .
  • the anchor blades are in number greater than four, for example five or six; and / or the screws such that there are no more than four numbers, for example two or six.
  • the body 2 is in another metallic material, for example steel; or in plastic, in which case the body is obtained by molding, with for example the anchoring blades which are retained at the ends of the grooves by latching lugs.
  • the anchor blades are made of another electrically conductive material (the electrical connection between the cables within the sleeve is essentially by the anchor blades), for example copper hard, hard aluminum or steel.
  • the partition such as 13 is integral with at least one of the blades such as 14.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Description

L'invention a trait aux manchons de raccordement pour câbles électriques.The invention relates to connection sleeves for electric cables.

On connaît déjà, notamment par le brevet américain 4,269,465, un tel manchon pour joindre bout à bout des câbles électriques semblables d'un réseau de distribution de l'électricité, c'est-à-dire typiquement des câbles formés par un assemblage de brins, un tel manchon opérant à la fois un raccordement électrique et un raccordement mécanique des deux câbles.US Pat. No. 4,269,465 already known from such a sleeve to join end-to-end similar electric cables of an electricity distribution network, that is to say typically cables formed by an assembly of strands. such a sleeve operating both an electrical connection and a mechanical connection of the two cables.

Le manchon décrit par ce document comporte :

  • un corps dans lequel est ménagé un alésage longitudinal s'étendant d'un premier orifice à un second orifice opposé au premier orifice, suivant une direction longitudinale, lequel alésage est délimité par une surface interne, ledit corps présentant des taraudages débouchant radialement dans l'alésage longitudinal, ledit corps comportant une rainure à section en croix dont l'une des branches est orientée radialement et l'autre branche orientée circonférentiellement, ladite rainure étant orientée suivant la direction longitudinale,
  • une lame d'ancrage en matériau conducteur, logée dans la portion de la rainure orientée radialement, comportant une longrine engagée dans la rainure et, émergeant de la longrine vers l'intérieur de l'alésage longitudinal, des dents d'ancrages orientées transversalement à la direction longitudinale, et
  • des vis de serrage chacune engagée dans un taraudage respectif,
ledit alésage longitudinal étant configuré pour recevoir une extrémité d'un premier câble électrique et une extrémité d'un second câble électrique à raccorder comportant chacun une âme conductrice,
ledit taraudage étant configuré pour que les vis de serrage pressent les extrémités de câbles sur les dents d'ancrage, lesdites dents d'ancrage étant configurées pour pénétrer dans l'âme conductrice des câbles électriques, et
la portion orientée circonférentiellement de la rainure délimitant de part et d'autre de la lame d'ancrage des portions du corps en porte-à-faux capables de fléchir pour absorber les variations dimensionnelles des câbles électriques lorsqu'ils changent de température.The sleeve described by this document comprises:
  • a body in which is formed a longitudinal bore extending from a first orifice to a second orifice opposite to the first orifice, in a longitudinal direction, which bore is delimited by an internal surface, said body having threads opening radially into the longitudinal bore, said body having a cross-section groove one of which is oriented radially and the other branch circumferentially oriented, said groove being oriented in the longitudinal direction,
  • an anchor blade of conductive material, housed in the portion of the groove radially oriented, having a sill engaged in the groove and, emerging from the sill towards the inside of the longitudinal bore, anchoring teeth oriented transversely to the longitudinal direction, and
  • clamping screws each engaged in a respective thread,
said longitudinal bore being configured to receive an end of a first electrical cable and an end of a second electrical cable to be connected each having a conductive core,
said tapping being configured so that the clamping screws press the cable ends onto the anchor teeth, said anchor teeth being configured to penetrate the conductive core of the electrical cables, and
the circumferentially oriented portion of the groove delimiting on both sides of the anchor blade portions of the cantilevered body capable of flexing to absorb the dimensional changes of the electric cables when they change temperature.

L'invention vise à fournir un manchon de raccordement semblable qui soit simple, commode et économique.The invention aims to provide a similar connecting sleeve that is simple, convenient and economical.

L'invention propose à cet effet un manchon de raccordement pour câbles électriques comportant :

  • un corps dans lequel est ménagé un alésage longitudinal s'étendant d'un premier orifice à un second orifice opposé au premier orifice, suivant une direction longitudinale, délimité par une surface interne, ledit corps comportant des taraudages débouchant radialement dans ledit alésage longitudinal, ledit corps comportant une rainure en retrait par rapport à la surface interne de l'alésage longitudinal, ladite rainure étant orientée selon la direction longitudinale,
  • une lame d'ancrage en matériau conducteur, logée dans ladite rainure, comportant une longrine et, émergeant de la longrine vers l'intérieur de l'alésage longitudinal, des dents d'ancrage orientées transversalement à ladite direction longitudinale, et
  • des vis de serrage chacune engagée dans un taraudage respectif,
ledit alésage longitudinal étant configuré pour recevoir une extrémité d'un premier câble électrique et une extrémité d'un second câble électrique à raccorder comportant chacun une âme conductrice,
lesdits taraudages étant configurés pour que les vis de serrage pressent les extrémités de câbles sur les dents d'ancrage, lesdites dents d'ancrage étant configurées pour pénétrer dans l'âme conductrice desdits câbles électriques,
caractérisé en ce que ledit corps comporte en outre de ladite rainure, appelée première rainure, une deuxième rainure semblable à la première rainure, et en ce que le manchon comporte en outre de ladite lame d'ancrage, appelée première lame d'ancrage, une deuxième lame d'ancrage en matériau conducteur semblable à la première lame d'ancrage, ladite deuxième lame d'ancrage étant logée dans la deuxième rainure, ledit corps étant rigide au voisinage desdites rainures.The invention proposes for this purpose a connection sleeve for electric cables comprising:
  • a body in which is formed a longitudinal bore extending from a first orifice to a second orifice opposite to the first orifice, in a longitudinal direction, delimited by an internal surface, said body having threads opening radially in said longitudinal bore, said body having a groove set back from the inner surface of the longitudinal bore, said groove being oriented in the longitudinal direction,
  • an anchoring blade of conductive material, housed in said groove, comprising a sill and, emerging from the sill towards the inside of the longitudinal bore, anchoring teeth oriented transversely to said longitudinal direction, and
  • clamping screws each engaged in a respective thread,
said longitudinal bore being configured to receive an end of a first electrical cable and an end of a second electrical cable to be connected each having a conductive core,
said threads being configured so that the clamping screws press the ends of the cables onto the anchor teeth, said anchor teeth being configured to penetrate into the conductive core of said electrical cables,
characterized in that said body further comprises said groove, called first groove, a second groove similar to the first groove, and in that the sleeve further comprises said anchor blade, referred to as the first anchor blade, a second anchor blade of conductive material similar to the first anchor blade, said second blade anchor being housed in the second groove, said body being rigid in the vicinity of said grooves.

Bien que cela soit surprenant en raison de la rigidité du corps de manchon au voisinage de chaque rainure logeant une lame d'ancrage, le manchon selon l'invention offre une excellente tenue mécanique des câbles, y compris lors des changements de température de ces derniers.Although it is surprising because of the rigidity of the sleeve body in the vicinity of each groove housing an anchoring blade, the sleeve according to the invention offers excellent mechanical strength of the cables, including during the temperature changes thereof. .

Il semblerait que cela soit dû au fait qu'il y a suffisamment de place entre les vis de fixation pour permettre la contraction et la dilation des câbles. En effet, pour permettre l'introduction du câble dans le manchon, le diamètre de la cavité interne est plus grand que celui du câble, d'au moins la hauteur des dents, ce qui laisse une place relativement importante.This seems to be due to the fact that there is enough space between the fixing screws to allow the contraction and expansion of the cables. Indeed, to allow the introduction of the cable into the sleeve, the diameter of the internal cavity is greater than that of the cable, at least the height of the teeth, which leaves a relatively large place.

Du fait qu'il y ait davantage de points de contact entre les lames d'ancrage et les câbles, le manchon selon l'invention offre une excellente qualité de liaison électrique et de liaison mécanique.Because there are more points of contact between the anchor blades and the cables, the sleeve according to the invention offers excellent quality of electrical connection and mechanical connection.

Les rainures du corps de manchon selon l'invention ayant une section simple, le manchon selon l'invention, bien qu'il comporte davantage de lames que le manchon susmentionné, est simple, commode et économique à fabriquer.The grooves of the sleeve body according to the invention having a single section, the sleeve according to the invention, although it comprises more blades than the aforementioned sleeve, is simple, convenient and economical to manufacture.

Selon des caractéristiques préférées:

  • chaque rainure a une section rectangulaire et chaque lame d'ancrage comporte une longrine de section rectangulaire et complémentaire de la section de la rainure respective ;
  • ledit corps comporte une troisième rainure semblable à la première rainure, et que le manchon comporte une troisième lame d'ancrage semblable aux deux premières lames d'ancrage, ladite troisième lame d'ancrage étant logée dans la troisième rainure ;
  • la première rainure est alignée avec les taraudages tandis que la deuxième rainure et la troisième rainure sont situées de part et d'autre à distance égale de la première rainure et sont parallèles à la première rainure ;
  • la première rainure est alignée avec les taraudages tandis que la deuxième rainure et la troisième rainure sont situées de part et d'autre à distance égale de la première rainure et sont orientées à un angle en direction des vis de serrage ;
  • le manchon comporte un nombre pair de rainures tandis que lesdites rainures sont réparties de manière uniforme de part et d'autre des vis de serrage, chaque dite rainure accueillant une lame d'ancrage respective ;
  • une cloison est portée par une des dites lames d'ancrage ;
  • une des lames d'ancrage comporte deux pattes, saillant de la première surface de la longrine, la cloison étant un élément rapporté et monté entre les deux dites pattes ;
  • le corps comporte des éléments de retenue configurés pour bloquer les lames d'ancrage en translation ;
  • chaque longrine s'étend respectivement d'une première extrémité de lame d'ancrage à une seconde extrémité de lame d'ancrage opposée à la première extrémité de lame d'ancrage, le corps comporte des langues de matière de part et d'autre de chaque première extrémité de lame d'ancrage et de chaque deuxième extrémité de lame d'ancrage, lesdites langues de matière étant configurées pour bloquer chaque lame d'ancrage en translation sur ledit corps ; et/ou
  • lesdites dents d'ancrage sont de hauteur comprise entre 0,3 mm et 1,5 mm ; et de préférence sont de hauteur comprise entre 0,6 mm et 0,8 mm.
According to preferred characteristics:
  • each groove has a rectangular section and each anchor blade has a longitudinal section of rectangular section and complementary to the section of the respective groove;
  • said body has a third groove similar to the first groove, and the sleeve has a third anchor blade similar to the first two anchor blades, said third anchor blade being housed in the third groove;
  • the first groove is aligned with the threads while the second groove and the third groove are located on either side at equal distance from the first groove and are parallel to the first groove;
  • the first groove is aligned with the threads while the second groove and the third groove are located on either side at equal distance from the first groove and are oriented at an angle towards the clamping screws;
  • the sleeve comprises an even number of grooves while said grooves are uniformly distributed on either side of the clamping screws, each said groove receiving a respective anchor blade;
  • a partition is carried by one of said anchor blades;
  • one of the anchoring blades comprises two tabs protruding from the first surface of the sill, the partition being an insert and mounted between the two said tabs;
  • the body comprises retaining elements configured to block the anchoring blades in translation;
  • each sill extends respectively from a first anchor blade end to a second anchor blade end opposite the first anchor blade end, the body has material tongues on either side of the anchor blade end; each first anchor blade end and each second anchor blade end, said material tongues being configured to lock each anchor blade in translation on said body; and or
  • said anchor teeth have a height of between 0.3 mm and 1.5 mm; and preferably have a height of between 0.6 mm and 0.8 mm.

On va maintenant poursuivre l'exposé de l'invention par la description détaillée d'exemples de réalisation, donnée ci-après à titre illustratif et non limitatif, en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue en plan d'un manchon de raccordement selon l'invention et de deux câbles électriques raccordés par ce manchon ;
  • la figure 2 est la vue en coupe repérée par II-II sur la figure 1, pour le seul manchon ;
  • la figure 3 est une vue de côté du manchon;
  • les figures 4 et 5 sont des vues en élévation respectivement de face et de côté d'une des lames d'ancrage que comporte le manchon ;
  • la figure 6 est un agrandissement de la partie basse de la figure 3;
  • la figure 7 est un agrandissement d'une portion de la partie basse de la figure 6 ;
  • la figure 8 est une vue semblable à la figure 6 pour une variante de réalisation ; et
  • la figure 9 est une vue semblable à la figure 6 pour une autre variante de réalisation.
We will now continue the description of the invention by the detailed description of embodiments, given below by way of illustration and not limitation, with reference to the accompanying drawings, in which:
  • the figure 1 is a plan view of a connection sleeve according to the invention and two electrical cables connected by this sleeve;
  • the figure 2 is the sectional view marked by II-II on the figure 1 , for the single sleeve;
  • the figure 3 is a side view of the sleeve;
  • the Figures 4 and 5 are elevational views respectively front and side of one of the anchoring blades that includes the sleeve;
  • the figure 6 is an enlargement of the lower part of the figure 3 ;
  • the figure 7 is an enlargement of a portion of the lower part of the figure 6 ;
  • the figure 8 is a view similar to the figure 6 for a variant embodiment; and
  • the figure 9 is a view similar to the figure 6 for another variant embodiment.

La figure 1 illustre un manchon de raccordement 1 comportant un corps 2 et quatre vis de serrage 5.The figure 1 illustrates a connection sleeve 1 comprising a body 2 and four clamping screws 5.

Comme il est visible à la figure 2, le manchon 1 est traversé par un alésage longitudinal 3 s'étendant d'un premier orifice 11a à un second orifice 11 b. Quatre taraudages 4 débouchent radialement d'une part dans cet alésage longitudinal 3 sur la surface interne 9 du corps 2 de manchon, d'autre part sur la surface extérieure 10. Ces taraudages 4 sont parallèles entre eux selon une direction 6. Les quatre vis de serrage 5 sont chacune engagées dans un taraudage 4 respectif.As it is visible to the figure 2 , the sleeve 1 is traversed by a longitudinal bore 3 extending from a first orifice 11a to a second orifice 11b. Four threads 4 open radially on the one hand in this longitudinal bore 3 on the inner surface 9 of the sleeve body 2, on the other hand on the outer surface 10. These threads 4 are parallel to each other in a direction 6. The four screws 5 are each engaged in a respective tapping 4.

Ainsi que visible sur les figures 3 et 6, trois rainures 12 longitudinales et de section rectangulaire sont ménagées dans le corps de manchon 2. Elles débouchent dans l'alésage longitudinal 3, en regard des vis de serrage 5.As visible on the figures 3 and 6 , three longitudinal grooves 12 of rectangular section are formed in the sleeve body 2. They open into the longitudinal bore 3, facing the clamping screws 5.

Chacune des rainures 12 loge une lame d'ancrage 14. Les trois lames d'ancrage 14 sont identiques. Chaque lame 14 est de longueur légèrement inférieure à la longueur du corps 2 de manchon. Le corps 2 est rigide au voisinage des rainures.Each of the grooves 12 houses an anchor blade 14. The three anchor blades 14 are identical. Each blade 14 is of length slightly less than the length of the sleeve body 2. The body 2 is rigid in the vicinity of the grooves.

Comme on le voit sur les figures 4 et 5, chaque lame d'ancrage 14 comporte une longrine 7. La section de la longrine 7 est rectangulaire et complémentaire de la section de la rainure 12 correspondante. Saillant d'une face 15 de la longrine 7, visible en haut des lames d'ancrage 14 sur les figures 2 à 7, se trouvent des dents d'ancrage 16. Ces dents d'ancrage 16 sont orientées transversalement à la direction longitudinale 8, sont de section triangulaire et ont ici toutes la même hauteur.As we see on the Figures 4 and 5 each anchoring blade 14 comprises a sill 7. The section of the sill 7 is rectangular and complementary to the section of the groove 12 corresponding. Protruding from one side 15 of the sill 7, visible at the top of the anchoring blades 14 on the Figures 2 to 7 are anchoring teeth 16. These anchor teeth 16 are oriented transversely to the longitudinal direction 8, are of triangular section and here all have the same height.

Les lames d'ancrage 14 comportent dans leur partie médiane deux pattes 17, ici de section rectangulaire. Une cloison 13 est logée entre celles-ci. Ici, la cloison 13 se présente sous forme d'une galette de petite hauteur et de section légèrement inférieure à celle de la section de l'alésage longitudinal 3. L'alésage longitudinal 3 est ainsi séparé en deux cavités 3a, 3b. Une première face 13a de la cloison 13 forme le fond de la première cavité 3a, la seconde face 13b formant le fond de 1a seconde cavité 3b. Comme il est visible à la figure 2, deux des quatre taraudages 4 débouchent dans la première cavité 3a, les deux autres taraudages 4 débouchent dans la seconde cavité 3b.The anchoring blades 14 comprise in their middle part two lugs 17, here of rectangular section. A partition 13 is housed therebetween. Here, the partition 13 is in the form of a slab of small height and section slightly smaller than that of the section of the longitudinal bore 3. The longitudinal bore 3 is thus separated into two cavities 3a, 3b. A first face 13a of the partition 13 forms the bottom of the first cavity 3a, the second face 13b forming the bottom of the second cavity 3b. As it is visible to the figure 2 two of the four threads 4 open into the first cavity 3a, the other two threads 4 open into the second cavity 3b.

La figure 6 montre en détail la géométrie de la partie du manchon 1 dans laquelle se trouvent les lames d'ancrage 14. Ici, les rainures 12 sont parallèles entre elles. Les lames d'ancrage 14 sont donc aussi parallèles entre elles. La lame d'ancrage 14 située au centre se trouve directement alignée avec les taraudages 4. Les lames d'ancrage 14 externes sont disposées de part et d'autre et à distance égale de la lame d'ancrage 14 située au centre.The figure 6 shows in detail the geometry of the part of the sleeve 1 in which are the anchoring blades 14. Here, the grooves 12 are parallel to each other. The anchoring blades 14 are therefore also parallel to each other. The anchoring blade 14 located in the center is directly aligned with the threads 4. The outer anchor blades 14 are disposed on both sides and at equal distance from the anchoring blade 14 located in the center.

L'assemblage du manchon 1 se fait à l'aide d'un dispositif de montage non représenté. Le dispositif de montage comporte une surface plane surmontée d'un ergot dont la face supérieure est parallèle à la surface plane. Dans l'ordre :

  • on place le corps 2 sur la surface plane du dispositif de montage avec l'ergot logé dans l'alésage longitudinal 3,
  • les lames d'ancrage 14 sont insérées dans le manchon 1 sur une première portion de leur longueur de façon à laisser dépasser les pattes 17,
  • la cloison 13 est insérée entre les pattes 17,
  • on achève alors d'introduire les lames dans le manchon 1 jusqu'à ce que la cloison 13 vienne en butée contre la face supérieure de l'ergot du dispositif de montage ; la longrine 7 de chaque lame d'ancrage 14 est alors recouverte sur trois de ses faces dans les rainures 12 ; la face supérieure 15 de chaque longrine 7 fait alors face à l'alésage longitudinal 3 dans lequel les dents d'ancrage 16 saillent;
  • on fixe enfin les lames d'ancrage 14 au corps de manchon 2 par une opération de sertissage.
The assembly of the sleeve 1 is done using a not shown mounting device. The mounting device comprises a flat surface surmounted by a lug whose upper face is parallel to the flat surface. In order :
  • the body 2 is placed on the flat surface of the mounting device with the lug housed in the longitudinal bore 3,
  • the anchoring blades 14 are inserted into the sleeve 1 over a first portion of their length so as to allow the tabs 17 to protrude,
  • the partition 13 is inserted between the legs 17,
  • it is then complete to introduce the blades in the sleeve 1 until the partition 13 abuts against the upper face of the lug of the mounting device; the sill 7 of each anchor blade 14 is then covered on three of its faces in the grooves 12; the upper face 15 of each sill 7 then faces the longitudinal bore 3 in which the anchor teeth 16 protrude;
  • the anchoring blades 14 are finally fixed to the sleeve body 2 by a crimping operation.

Cette opération de sertissage s'effectue à l'aide d'un poinçon à extrémité effilée. On donne un coup de poinçon sur la portion d'extrémité du corps 2 de manchon située entre les lames d'ancrage 14, et de part et d'autre des lames d'ancrage 14 externes. Les langues de matière 19 ainsi formées maintiennent les lames d'ancrage 14 en place. Les langues de matières 19 ainsi que les marques 20 laissées par les coups de poinçon sont représentées à la figure 7 (non représentées sur les autres figures par souci de simplicité).This crimping operation is carried out using a punch with tapered end. Punching is done on the end portion of the sleeve body 2 located between the anchoring blades 14, and on both sides external anchor blades 14. The material tongues 19 thus formed hold the anchor blades 14 in place. The material languages 19 as well as the marks 20 left by the punch marks are represented at the figure 7 (not shown in the other figures for the sake of simplicity).

Les câbles électriques 30 à raccorder sont du type comportant une âme conductrice formée de brins. S'ils ont un revêtement en matière isolante, les câbles électriques 30 sont dénudés sur leur portion à insérer dans le manchon 1. Par souci de simplicité, les brins ne sont pas représentés sur les dessins.The electrical cables 30 to be connected are of the type comprising a conductor core formed of strands. If they have a coating of insulating material, the electrical cables 30 are stripped on their portion to be inserted into the sleeve 1. For simplicity, the strands are not shown in the drawings.

On insère une extrémité d'un premier câble électrique 30 dans la première cavité 3a et une extrémité d'un deuxième câble électrique 30 dans la seconde cavité 3b. Lors du serrage des vis 5, les câbles électriques 30 sont pressés contre les dents d'ancrage 16. Celles-ci pénètrent alors entre les brins de l'âme conductrice.One end of a first electrical cable 30 is inserted into the first cavity 3a and one end of a second electrical cable 30 into the second cavity 3b. When tightening the screws 5, the electric cables 30 are pressed against the anchoring teeth 16. These then penetrate between the strands of the conductive core.

Les vis de serrage 5 sont du type auto-sécable, c'est-à-dire que la tête de ces vis de serrage 5 rompt automatiquement lorsqu'un couple prédéterminé de serrage est atteint. Cela permet tout à la fois d'éviter de serrer trop fortement les câbles à raccorder, tels que les câbles 30, et de rendre inviolable le raccordement entre les câbles 30 opéré par le manchon 1.The clamping screws 5 are of the self-breaking type, that is to say that the head of these clamping screws 5 breaks automatically when a predetermined tightening torque is reached. This makes it possible at the same time to avoid tightening too tightly the cables to be connected, such as the cables 30, and to make the connection between the cables 30 operated by the sleeve 1 inviolable.

Les lames d'ancrage 14 servent tout à la fois à relier électriquement entre eux les deux câbles 30 insérés dans le manchon de raccordement 1 et à les immobiliser mécaniquement.The anchoring blades 14 serve both to electrically connect the two cables 30 inserted in the connecting sleeve 1 and to immobilize them mechanically.

On notera que l'orientation transversale des dents offre une excellente tenue à l'arrachement, ce qui permet d'utiliser le manchon 1 à la fois pour opérer un raccordement électrique et un raccordement mécanique, par exemple pour des câbles 30 aériens ou souterrains d'un réseau de distribution de l'électricité.It should be noted that the transverse orientation of the teeth offers excellent resistance to pull-out, which makes it possible to use the sleeve 1 at a time to make an electrical connection and a mechanical connection, for example for overhead or underground cables. a distribution network of electricity.

Ici, où le manchon 1 est prévu pour de tels câbles, les dents d'ancrage 16 ont une hauteur comprise entre 0,3 et 1,5 mm ; et de préférence entre 0,6 et 0,8 mm car cette dernière plage correspond à environ 1/3 à 2/3 du diamètre des brins des câbles électriques utilisés classiquement dans les réseaux de distribution de l'électricité.Here, where the sleeve 1 is provided for such cables, the anchoring teeth 16 have a height of between 0.3 and 1.5 mm; and preferably between 0.6 and 0.8 mm because this last range corresponds to about 1/3 to 2/3 of the diameter of the strands of the electric cables conventionally used in the electricity distribution networks.

Les câbles électriques 30 admissibles dans le manchon 1 peuvent avoir un diamètre inférieur ou égal au diamètre d'un cercle 31, visible à la figure 6, passant par le sommet des dents d'ancrage 16. Après serrage, un câble électrique 30 du diamètre maximal admissible se trouvera plaqué contre la surface interne 9 et en épousera le contour.The electrical cables 30 allowed in the sleeve 1 may have a diameter less than or equal to the diameter of a circle 31, visible at the figure 6 passing through the top of the anchoring teeth 16. After tightening, an electric cable 30 of the maximum permissible diameter will be pressed against the inner surface 9 and will marry the contour.

Il est par ailleurs à noter que l'opération de sertissage vise à maintenir les lames d'ancrage 14 dans le corps 2 de manchon essentiellement pendant le transport et les manipulations. Une fois les câbles électriques 30 montés, c'est le serrage par les vis 5 qui opère l'ancrage des câbles électriques 30 dans le manchon 1.It should also be noted that the crimping operation aims to keep the anchoring blades 14 in the sleeve body 2 essentially during transport and handling. Once the electrical cables 30 are mounted, it is the tightening by the screws 5 which operates the anchoring of the electric cables 30 in the sleeve 1.

Pour ce qui est de la fabrication, on obtient tout d'abord par filage le corps 2 de manchon comportant l'alésage 3 et les rainures 12. Les taraudages 4 sont usinés dans un second temps. Dans les exemples illustrés, le manchon 1 est en aluminium.As regards the manufacture, the sleeve body 2 having the bore 3 and the grooves 12 is firstly drawn by spinning. The threads 4 are machined in a second step. In the examples illustrated, the sleeve 1 is made of aluminum.

Les lames d'ancrage 14 sont cisaillées dans une bande de laiton de quelques millimètres d'épaisseur.The anchoring blades 14 are sheared in a brass strip a few millimeters thick.

La variante du manchon 1 illustrée sur la figure 8 est identique au mode de réalisation illustré sur les figures 1 à 7 si ce n'est que les rainures 12 externes sont orientées vers le centre de l'alésage longitudinal 3 à un angle par rapport à la rainure 12 située au centre.The variant of the sleeve 1 illustrated on the figure 8 is identical to the embodiment illustrated on the Figures 1 to 7 except that the outer grooves 12 are oriented towards the center of the longitudinal bore 3 at an angle to the centrally located groove 12.

L'inclinaison des lames externes 14 permet d'orienter l'arête des dents 16 de ces lames externes 14 suivant le cercle 31.The inclination of the outer blades 14 makes it possible to orient the edge of the teeth 16 of these outer blades 14 along the circle 31.

La variante du manchon 1 illustrée sur la figure 9 est identique au mode de réalisation illustré sur les figures 1 à 7 si ce n'est que la lame 14 située au centre est supprimée.The variant of the sleeve 1 illustrated on the figure 9 is identical to the embodiment illustrated on the Figures 1 to 7 except that the centrally located blade 14 is removed.

En l'absence de la lame 14 centrale, les deux lames 14 restantes sont réparties de façon homogène de part et d'autre des vis 5. En particulier, la distance du sommet des dents 16 par rapport aux vis 5 est identique pour chacune des lames 14. Cela est favorable à une coopération équilibrée des câbles 30 avec les lames 14.In the absence of the central blade 14, the two remaining blades 14 are evenly distributed on either side of the screws 5. In particular, the distance from the top of the teeth 16 to the screws 5 is identical for each of the This is favorable to a balanced cooperation of the cables 30 with the blades 14.

Dans une variante non représentée, le manchon comporte un autre couple de lames 14, également disposées de façon équilibrée, c'est-à-dire que chaque lame 14 de ce couple supplémentaire est disposée dans le corps 2 en image miroir de l'autre lame 14 de ce couple.In a variant not shown, the sleeve comprises another pair of blades 14, also arranged in a balanced manner, that is to say that each blade 14 of this additional torque is disposed in the body 2 in mirror image of the other blade 14 of this pair.

Ainsi, l'on a également dans cette variante une coopération équilibrée des câbles 30 avec les lames d'ancrage 14.Thus, in this variant, there is also a balanced co-operation of the cables 30 with the anchoring blades 14.

Dans d'autres variantes non illustrées, il y a deux ou quatre lames d'ancrage disposées de façon homogène mais, au lieu d'être disposées dans la même orientation que les vis 5, les lames d'ancrage sont disposées de façon inclinées comme les lames externes de la variante illustrée sur la figure 8.In other variants not shown, there are two or four anchor blades arranged homogeneously but, instead of being arranged in the same orientation as the screws 5, the anchoring blades are arranged inclined as the outer blades of the variant illustrated on the figure 8 .

Dans d'autres variantes, les lames d'ancrages sont en nombre supérieur à quatre, par exemple cinq ou six ; et/ou les vis telles que 5 sont en nombre différent de quatre, par exemple deux ou six.In other variants, the anchor blades are in number greater than four, for example five or six; and / or the screws such that there are no more than four numbers, for example two or six.

Dans des variantes non représentées, le corps 2 est dans une autre matière métallique, par exemple en acier ; ou alors en matière plastique, auquel cas le corps est obtenu par moulage, avec par exemple les lames d'ancrage qui sont retenues aux extrémités des rainures par des pattes d'encliquetage.In variants not shown, the body 2 is in another metallic material, for example steel; or in plastic, in which case the body is obtained by molding, with for example the anchoring blades which are retained at the ends of the grooves by latching lugs.

Dans d'autres variantes non représentées, les lames d'ancrage sont réalisées dans une autre matière conductrice de l'électricité (la liaison électrique entre les câbles au sein du manchon se fait essentiellement par les lames d'ancrage), par exemple en cuivre dur, en aluminium dur ou en acier.In other variants not shown, the anchor blades are made of another electrically conductive material (the electrical connection between the cables within the sleeve is essentially by the anchor blades), for example copper hard, hard aluminum or steel.

Dans d'autres variantes non représentées, la cloison telle que 13 est venue de matière avec au moins l'une des lames telles que 14.In other variants not shown, the partition such as 13 is integral with at least one of the blades such as 14.

Claims (12)

  1. Connecting sleeve for electric cables, comprising:
    - a body (2) in which a longitudinal bore (3) is provided, extending from a first orifice (11a) to a second orifice (11b) opposite to the first orifice (11a), in a longitudinal direction (8), delimited by an internal surface (9), said body (2) comprising threaded holes (4) emerging radially in said longitudinal bore (3), said body (2) comprising a groove (12) recessed with respect to the internal surface (9) of the longitudinal bore (3), said groove (12) being oriented in the longitudinal direction (8),
    - a anchoring blade (14) made from conductive material, housed in said groove (12), comprising a longitudinal bar (7) and, emerging from the longitudinal bar (7) towards the inside of the longitudinal bore (3), anchoring teeth (16) oriented transversely to said longitudinal direction (8), and
    - clamping screws (5) each engaged in a respective threaded hole (4),
    said longitudinal bore (3) being configured so as to receive an end of a first electric cable (30) and an end of a second electric cable (30) to be connected, each comprising a conductive core,
    said threaded holes (4) being configured so that the clamping screws (5) press the cable ends (30) onto the anchoring teeth (16), said anchoring teeth (16) being configured so as to penetrate the conductive core of said electric cables (30),
    characterized in that said body (2) comprises, in addition to said groove (12), referred to as the first groove, a second groove (12) similar to the first groove, and in that the sleeve (1) comprises, in addition to said anchoring blade (14), referred to as the first anchoring blade (14), a second anchoring blade (14) made from conductive material similar to the first anchoring blade (14), said second anchoring blade (14) being housed in the second groove (12), said body (2) being rigid in the vicinity of said grooves (12).
  2. Sleeve according to claim 1, characterized in that each groove (12) has a rectangular cross section and each anchoring blade (14) comprises a longitudinal bar (7) with a rectangular cross section complementary to the cross section of the respective groove (12).
  3. Sleeve according to one of claims 1 and 2, characterized in that said body (2) comprises a third groove (12) similar to the first groove (12), and in that the sleeve comprises a third anchoring blade (14) similar to the first two anchoring blades (14), said third anchoring blade (14) being housed in the third groove (12).
  4. Sleeve according to claim 3, characterized in that the first groove (12) is aligned with the threaded holes (4) while the second groove (12) and the third groove (12) are situated on either side at equal distances from the first groove (12) and are parallel to the first groove (12).
  5. Sleeve according to claim 3, characterized in that the first groove (12) is aligned with the threaded holes (4) while the second groove (12) and the third groove (12) are situated on either side at equal distances from the first groove (12) and are oriented at an angle in the direction of the clamping screws (5).
  6. Sleeve according to one of claims 1 and 2, characterized in that the sleeve (1) comprises an even number of grooves (12) while said grooves are distributed uniformly on either side of the clamping screws (5), each said groove (12) accepting a respective anchoring blade (14).
  7. Sleeve according to any one of claims 1 to 6, characterized in that a partition (13) is carried by one of said anchoring blades (14).
  8. Sleeve according to claim 7, characterized in that one of the anchoring blades (14) comprises two lugs (17), projecting from the first surface (15) of the longitudinal bar (7), the partition (13) being an attached element mounted between the two said lugs (17).
  9. Sleeve according to any one of claims 1 to 8, characterized in that the body (2) comprises holding elements (19) configured so as to lock the anchoring blades (14) with respect to translation.
  10. Sleeve according to claim 9, characterized in that each longitudinal bar (7) extends respectively from a first anchoring-blade end (14) to a second anchoring-blade end (14) opposite to the first anchoring-blade end (14), the body (2) comprises tongues of material (19) on either side of each first anchoring-blade end (14) and each second anchoring-blade end (14), said tongues of material (19) being configured so as to lock each anchoring blade (14) with respect to translation on said body (2).
  11. Sleeve according to any one of claims 1 to 10, characterized in that said anchoring teeth (16) have a height of between 0.3 mm and 1.5 mm.
  12. Sleeve according to claim 11, characterized in that said anchoring teeth (16) have a height of between 0.6 mm and 0.8 mm.
EP12165368.7A 2011-04-26 2012-04-24 Connecting sleeve for electrical cables Active EP2518831B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1153576A FR2974676B1 (en) 2011-04-26 2011-04-26 CONNECTING SLEEVE FOR ELECTRIC CABLES

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EP2518831A1 EP2518831A1 (en) 2012-10-31
EP2518831B1 true EP2518831B1 (en) 2015-06-10

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EP (1) EP2518831B1 (en)
FR (1) FR2974676B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104377461B (en) * 2013-08-14 2017-02-15 江苏嘉盟电力设备有限公司 Underground insulated cable piercing cable clamp
US9692196B2 (en) * 2015-02-24 2017-06-27 Thomas & Betts International Llc Cable wire brushing connector
US10446953B1 (en) 2018-06-07 2019-10-15 RabyConnectInc. Electrical connector

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Publication number Priority date Publication date Assignee Title
US4269465A (en) * 1979-12-26 1981-05-26 Amp Incorporated Splice connector for aluminum wire
US4352537A (en) * 1980-06-11 1982-10-05 Bell Telephone Laboratories, Incorporated Cord adapter

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EP2518831A1 (en) 2012-10-31
FR2974676A1 (en) 2012-11-02
FR2974676B1 (en) 2013-06-07

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