EP2304848B1 - Electric terminal with a screw, terminal board including such an electric terminal, and electric appliance including such a terminal board - Google Patents

Electric terminal with a screw, terminal board including such an electric terminal, and electric appliance including such a terminal board Download PDF

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Publication number
EP2304848B1
EP2304848B1 EP09793999.5A EP09793999A EP2304848B1 EP 2304848 B1 EP2304848 B1 EP 2304848B1 EP 09793999 A EP09793999 A EP 09793999A EP 2304848 B1 EP2304848 B1 EP 2304848B1
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EP
European Patent Office
Prior art keywords
terminal
screw
section
intended
external
Prior art date
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Application number
EP09793999.5A
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German (de)
French (fr)
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EP2304848A1 (en
Inventor
Jean-Marie Trico
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP2304848A1 publication Critical patent/EP2304848A1/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
    • H01R4/307—Clamped connections, spring connections utilising a screw or nut clamping member characterised by the thread of the screw or nut
    • 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
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks

Definitions

  • the invention relates to an electric screw terminal comprising a metal cage through which an elongated passage for receiving a connection pad of an electrical apparatus.
  • the cage comprises a threaded orifice passing through a wall of said cage.
  • a telescopic screw passing through the threaded orifice comprises an operating head intended to be actuated to control said screw and comprises a clamping head for clamping an electrical conductor and the connection pad.
  • the telescopic screw comprises at least a first cylindrical section having an external thread intended to collaborate with the threaded orifice and having an internal thread designed to collaborate with an external thread of at least a second cylindrical section.
  • the invention also relates to a terminal block comprising such a screw terminal and an electrical device comprising such a terminal.
  • the applicant's solution described in the document FR2777703 and represented at figure 1 comprises a screw terminal 1 intended to be mounted in a housing 2 provided in the rear part of an electrical appliance, in particular a cut-off device 3 for making the connection of an electrical conductor 6 to the connection pad 4 of the device.
  • This terminal is formed mainly by a cage 5 formed of a metal block of substantially parallelepipedal shape having an elongate opening 5b for receiving the aforementioned range 4.
  • the cage 5 can also be formed by a portion of metal strip cut and folded to curl into a substantially rectangular ring.
  • Said range is intended to be engaged transversely in the elongated opening 5b, for example substantially rectangular, of the cage 5.
  • Said cage 5 comprises in its upper part, a tapped hole in which is screwed a screw 7 said terminal screw, adapted to effect the tightening of the conductor 6 on the range 4.
  • the terminal screw 7 comprises an actuating head, a threaded rod and a neck connecting the threaded rod to the head.
  • the threaded rod, or a non-threaded extension of this rod ends at its free end by a bearing such as a shoe 8.
  • the pad is located inside the terminal 5 and is intended to cooperate with the range 4
  • the terminal screw 7 is preferably accessible from the upper part of the cut-off device 3.
  • the length of the screw is directly proportional to the clamping capacity of the screw terminal.
  • the greater the clamping capacity in other words the greater the diameter of the conductors to be clamped or the more conductors to be clamped, then the longer the elongated opening and the longer the terminal screw. This implies greater congestion of the screw terminal when said terminal is not used waiting clamping.
  • each section of the screw has its own training profile.
  • Each training profile being independent, the user must operate all drive profiles to ensure effective clamping.
  • the drive order of the different sections is also essential to ensure effective clamping.
  • several separate tools must be used to maneuver the training profiles respectively.
  • the invention therefore aims to overcome the disadvantages of the state of the art, so as to provide a screw terminal having a large clamping capacity and having reduced dimensions.
  • It comprises an operating head having a single drive profile intended to collaborate with an external tool to drive together in rotation said at least first and at least second sections of the telescopic screw via drive means.
  • said drive profile is positioned at a first end of said at least one second cylindrical section and the clamping head is positioned at a second end of said at least one second cylindrical section.
  • the drive means comprise at least one elastic deformable means interposed between said at least one first section and said at least one second section and being adapted to deform to secure said sections.
  • said at least one elastic deformable means comprises a split ring interposed between the inner wall of said at least one first section and the outer wall of said at least one second segment, said ring having an outer cylindrical surface bearing against the inner wall of one of said at least one first section.
  • said at least one first section comprises a conical inner wall on which the outer cylindrical surface of said ring bears
  • said at least one second section comprises holding means causing said split ring in translation.
  • the displacement of the second section causes the displacement of the outer cylindrical surface of the split ring on the slope of the cone to wedge said ring between the inner wall of said at least one first section and the outer wall of said at least one second section.
  • the drive means comprise at least one friction surface between an inner surface of said at least one first section and an outer surface of said at least one second section, said friction surface allowing the locking in rotation of one section relative to the other.
  • the drive means comprise a male / female cone system, a female part being formed by the inner surface of the first section and a male part being formed by the outer surface of the second section, the said at least one friction surface being located in the area of contact between the male and female parts.
  • the drive means are intended to drive simultaneously or successively in rotation all the threaded sections of the telescopic terminal screw.
  • the telescopic screw comprises two sections, one of the sections having a thread with a step to the right and the other section having a thread with a step to the left.
  • a bomier according to the invention comprises at least one electrical screw terminal as defined above.
  • the bomier comprises at least one internal volume comprising means for positioning said at least one screw terminal in a first position.
  • the positioning means are retractable to allow the movement of said at least one electrical terminal in the internal volume of the bomier, moving the first position to a second position.
  • the bomier comprises several internal volumes separated from each other by insulating separation cheeks.
  • An electrical apparatus comprises a bomier as defined above.
  • the terminal block has an internal volume comprising positioning means for holding said at least one screw terminal in a first position.
  • the electrical screw terminal 1 comprises a metal cage 5 through an elongated passage for receiving a connection pad 4 of an electrical apparatus.
  • the electrical screw terminal 1 is particularly intended to connect electrical switching devices, including circuit breakers to electrical conductors.
  • the cage 5 comprises a threaded orifice passing through a wall of said cage.
  • the cage 5 is made from a flat metal folded in the form of a U. The two ends of the branches of the U are connected by a metal cross in which is made the orifice tapped.
  • the electrical screw terminal 1 comprises a telescopic screw 7 for clamping an electrical conductor 6 and the connection pad.
  • the telescopic screw 7 comprises at least a first cylindrical section 7A having an external thread intended to collaborate with the threaded orifice. Said section also comprises an internal thread intended to collaborate with an external thread of at least a second cylindrical section 7B.
  • the cylindrical sections are coaxial and concentric.
  • the telescopic screw 7 comprises an operating head 9 intended to be actuated for the screwing of said screw.
  • the telescopic screw 7 further comprises a clamping head 8 for applying a clamping force to the connection pad 4 and the electrical conductor.
  • the clamping head 8 of the telescopic screw 7 has a clamping profile 8A intended to collaborate with the electrical conductor 6 to be clamped on the connection pad 4.
  • the clamping profile 8A is preferably positioned at a second end of said at least one second section 7B cylindrical.
  • the operating head 9 of the telescopic screw 7 comprises a single drive profile 9A.
  • Said training profile 9A is intended to collaborate with an external tool such as a key used by an installer.
  • the single drive profile 9A is preferably positioned at a first end of said at least one second cylindrical section 7B.
  • the drive profile 9A is hollow and has a hexagonal shape.
  • the operating head 9 comprises drive means 9B for driving together in rotation all the sections 7A, 7B of the telescopic screw 7 by the drive profile 9A.
  • the tightening of the electrical conductor 6 and the connection pad 4 is always achieved by said at least second section 7B via the clamping profile 8A.
  • the telescopic screw 7 comprises two cylindrical sections 7A, 7B.
  • the drive means 9B of the actuating head 9 comprise a deformable elastic means interposed between said at least first section 7A and said at least second section 7B.
  • Said resilient means is adapted to deform to secure said sections.
  • the deformation of said at least one elastic means is generated by the displacement of one of the two sections 7B.
  • said deformable elastic means comprises a split ring interposed between the inner wall of said at least one first section 7A and the outer wall of said at least one second section 7B.
  • Said ring has an outer cylindrical surface bearing against the inner wall of one of said at least one first section 7A.
  • Said at least one first section 7A preferably comprises a conical inner wall on which the external cylindrical surface of said ring rests.
  • Said at least one second section 7B comprises holding means driving said split ring in translation.
  • the outer wall of said at least second section 7B comprises at least one shoulder for axially securing the split ring to said section.
  • the ring split is preferably positioned in a groove placed on the outer perimeter of said at least second section 7B. Said groove allows expansion of the ring during displacement of the second section 7B relative to the first.
  • the method of clamping an electrical conductor 6 with the connection pad 4 is as follows.
  • the displacement of each section is between two travel stops.
  • a first stop corresponds to a position of the section in the released position.
  • a second stop corresponds to a position of the section when the latter has moved over the entire length of its external thread from a loosened position to a locked position.
  • the displacement stops of said at least first section 7A cooperate with the cage 5 of the electrical screw terminal.
  • the displacement stops of said at least second section 7B preferably collaborate with said at least first section 7A.
  • the displacement of said at least second section 7B, via the drive profile 9A, causes the displacement of the outer cylindrical surface of the split ring on the slope of the cone to wedge said ring between the inner wall of said at least first section 7A and the outer wall of said at least second section 7B.
  • the jamming of said ring between the two walls of the two sections 7A, 7B makes it possible to secure said two sections so that the rotation drive of the second section 7B rotates the first section 7A.
  • the screwing of the first section 7A is via the actuation of the drive profile 9A placed at the end of the second section 7B cylindrical.
  • the displacement of the telescopic screw 7 via the actuating head 9 causes the movement of all the sections thanks to the presence of the drive means 9B and the drive profile 9A.
  • the telescopic screw 7 does not deploy, said at least first section 7A moves between its first and second displacement stops, said at least second section 7B does not move relative to said at least a first section 7A . If the first section 7A reaches the second displacement stop and the clamping between the range 4 and the conductor 6 is not achieved, the tightening torque applied to the operating head 9 will cause the deployment of the second section 7B which will in turn move between its first and second displacement stop.
  • the dimensions of the cage 5 and the length of the telescopic screw 7 are made such that the second stop of the second section 7B is not reached before the clamping is performed.
  • the drive means comprise at least one friction surface between an inner surface of said at least one first section 7A and an outer surface of said at least one second section 7B. Said friction surface allows blocking in rotation of one section relative to the other.
  • the drive means thus comprise a male / female cone system. A female part is formed by an inner face of the first section 7A and a male part is formed by the outer face of the second section 7B. Said at least one friction surface is then located at the contact zone between the male and female parts.
  • the sections can be linked together by applying a torque in the loosening direction via the drive profile 9A.
  • the friction surface then plays a role similar to that of said at least one deformable elastic means described above.
  • this tightening order is imposed by the use of a single drive profile 9A and the presence of the drive means 9B. This ensures effective clamping of the conductor 6 regardless of its diameter.
  • the telescopic screw 7 has three cylindrical sections.
  • the operation for a telescopic screw 7 with three sections is similar to that of a telescopic screw 7 with two sections.
  • the second end of said at least second section 7B preferably comprises a clamping V.
  • the clamping V positioned substantially perpendicular to the cylindrical section allows a better distribution of the clamping force on the electrical conductor.
  • the clamping V can be connected to the second end of the second section 7B via a ball joint.
  • the drive means 9B are intended to simultaneously drive in rotation all the threaded sections of the telescopic terminal screw.
  • the drive means 9B are intended to drive successively in rotation all the sections of the telescopic terminal screw.
  • said at least one first section 7A has an internal thread different from the external thread.
  • the relative displacement of the first section 7A in the threaded orifice is then carried out at a speed different from the relative displacement of the at least one second section 7B relative to the first.
  • said at least one first section 7A comprises an internal thread having a right pitch and an external thread having a pitch on the left.
  • the invention relates to a door 2 comprising at least one electrical screw terminal 1 as defined below.
  • the substantially parallelepiped shaped bomier is preferably made of molded plastic material.
  • Said door 2 comprises a wall 20 delimiting at least one internal volume 21.
  • the bomier comprises positioning means 22 of the electrical screw terminal 1 in a first position.
  • the terminal block is three-phase and comprises three internal volumes 21 respectively comprising a screw terminal 1.
  • the internal volumes 21 are separated from each other by separation cheeks 23 of insulating material.
  • the positioning means 22 are preferably retractable to allow the positioning of said at least one electrical screw terminal 1 in a second position.
  • the positioning means 22 comprise small protuberances molded in the wall of the bomier.
  • each volume internal 21 has four protuberances in the form of half-column placed on two walls of each internal volume 21.
  • each electrical screw terminal 1 is placed in the first position when clamping is to be achieved between a fixed connection area 4 of an electrical apparatus and a single electrical conductor 6.
  • each electrical screw terminal 1 is placed in the second position when clamping is to be achieved between a fixed connection area 4 of an electrical apparatus and two electrical conductors 6.
  • the user To move from the first position to the second position the user must unscrew the telescopic screw 7 with a tool.
  • said screw moves and comes to rest on the wall 20 of the block 2.
  • the metal cage 5 In a second step, the screw can no longer move, the metal cage 5 then moves in the opposite direction matting the positioning means 22.
  • the positioning means 22 crash and allow the displacement of the cage 5 which reaches the second position.
  • the clamping capacity of the terminal is then maximum.
  • the invention relates to an electrical apparatus, in particular an electric switching device such as a contactor, circuit breaker or switch.
  • Said apparatus comprises at least one bomier 2 as defined below.
  • Said door 2 has an internal volume comprising positioning means 22 for holding said at least one screw terminal 1 in a first position.
  • said apparatus comprises attachment means allowing a removable attachment of the terminal block 2 on said apparatus.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention est relative à une borne électrique à vis comportant une cage métallique traversée par un passage allongé destiné à recevoir une plage de connexion d'un appareil électrique. La cage comporte un orifice taraudé traversant une paroi de ladite cage. Une vis télescopique traversant l'orifice taraudé comporte une tête de manoeuvre destinée à être actionnée pour commander ladite vis et comporte une tête de serrage destinée à serrer un conducteur électrique et la plage de connexion. La vis télescopique comporte au moins un premier tronçon cylindrique ayant un filetage externe destiné à collaborer avec l'orifice taraudé et ayant un filetage interne destiné à collaborer avec un filetage externe d'au moins un second tronçon cylindrique.The invention relates to an electric screw terminal comprising a metal cage through which an elongated passage for receiving a connection pad of an electrical apparatus. The cage comprises a threaded orifice passing through a wall of said cage. A telescopic screw passing through the threaded orifice comprises an operating head intended to be actuated to control said screw and comprises a clamping head for clamping an electrical conductor and the connection pad. The telescopic screw comprises at least a first cylindrical section having an external thread intended to collaborate with the threaded orifice and having an internal thread designed to collaborate with an external thread of at least a second cylindrical section.

L'invention est aussi relative à une bornier comportant une telle borne à vis et un appareil électrique comportant un tel bomier.The invention also relates to a terminal block comprising such a screw terminal and an electrical device comprising such a terminal.

ETAT DE LA TECHNIQUE ANTERIEURESTATE OF THE PRIOR ART

De nombreux brevets EP0896387B1 , EP0758804B1 , EP0687032B1 , FR2777703 décrivent des bornes à vis destinées à des appareillages électriques.Many patents EP0896387B1 , EP0758804B1 , EP0687032B1 , FR2777703 describe screw terminals for electrical equipment.

Parmi ces solutions existantes, la solution de la demanderesse décrite dans le document FR2777703 et représentée à la figure 1, comporte une borne à vis 1 destinée à être montée dans un logement 2 prévu dans la partie arrière d'un appareil électrique notamment d'un dispositif de coupure 3 pour effectuer le raccordement d'un conducteur électrique 6 sur la plage de connexion 4 du dispositif. Cette borne est formée principalement par une cage 5 formée d'un bloc métallique de forme sensiblement parallélépipédique comportant une ouverture allongé 5b destiné à recevoir la plage précitée 4. La cage 5 peut aussi être formée par une portion de bande métallique découpée et pliée pour se boucler en anneau sensiblement rectangulaire.Among these existing solutions, the applicant's solution described in the document FR2777703 and represented at figure 1 , comprises a screw terminal 1 intended to be mounted in a housing 2 provided in the rear part of an electrical appliance, in particular a cut-off device 3 for making the connection of an electrical conductor 6 to the connection pad 4 of the device. This terminal is formed mainly by a cage 5 formed of a metal block of substantially parallelepipedal shape having an elongate opening 5b for receiving the aforementioned range 4. The cage 5 can also be formed by a portion of metal strip cut and folded to curl into a substantially rectangular ring.

Ladite plage est destinée à être engagée transversalement dans l'ouverture allongée 5b, par exemple sensiblement rectangulaire, de la cage 5.Said range is intended to be engaged transversely in the elongated opening 5b, for example substantially rectangular, of the cage 5.

Ladite cage 5 comporte dans sa partie supérieure, un orifice taraudé dans lequel est vissée une vis 7 dite vis de borne, apte à effectuer le serrage du conducteur 6 sur la plage 4.Said cage 5 comprises in its upper part, a tapped hole in which is screwed a screw 7 said terminal screw, adapted to effect the tightening of the conductor 6 on the range 4.

La vis de borne 7 comprend une tête de manoeuvre, une tige filetée et un col reliant la tige filetée à la tête. La tige filetée, ou un prolongement non fileté de cette tige, se termine à son extrémité libre par une portée tel qu'un patin 8. Le patin est situé à l'intérieur de la borne 5 et est destiné à coopérer avec la plage 4The terminal screw 7 comprises an actuating head, a threaded rod and a neck connecting the threaded rod to the head. The threaded rod, or a non-threaded extension of this rod, ends at its free end by a bearing such as a shoe 8. The pad is located inside the terminal 5 and is intended to cooperate with the range 4

La vis de borne 7 est de préférence accessible à partir de la partie supérieure du dispositif de coupure 3.The terminal screw 7 is preferably accessible from the upper part of the cut-off device 3.

La longueur de la vis est directement proportionnelle à la capacité de serrage de la borne à vis. Plus la capacité de serrage est importante, autrement dit plus le diamètre des conducteurs à serrer est grand ou plus il y a de conducteurs à serrer, alors plus l'ouverture allongé est importante et plus la vis de borne est longue. Ceci implique un encombrement plus important de la borne à vis lorsque ladite borne n'est pas utilisée en attente de serrage.The length of the screw is directly proportional to the clamping capacity of the screw terminal. The greater the clamping capacity, in other words the greater the diameter of the conductors to be clamped or the more conductors to be clamped, then the longer the elongated opening and the longer the terminal screw. This implies greater congestion of the screw terminal when said terminal is not used waiting clamping.

La solution telle que décrite dans le document US6280264B1 résout certains des problèmes soulevés ci-dessus en proposant une vis de serrage télescopique. La vis de serrage télescopique réalisée en deux tronçons de même longueur permet ainsi de réduire l'encombrement de la borne à vis pour une capacité de serrage relativement grande. Selon cet exemple de réalisation, la hauteur de la vis est sensiblement réduite par deux ce qui permet de réduire la hauteur totale de la borne desserrée d'un tiers.The solution as described in the document US6280264B1 solves some of the problems raised above by proposing a telescopic clamping screw. The telescopic clamping screw made in two sections of the same length thus reduces the size of the screw terminal for a relatively large clamping capacity. According to this embodiment, the height of the screw is substantially reduced by two which reduces the total height of the terminal loosened by a third.

Cependant, ce type de vis télescopique présente un certain nombre d'inconvénients. En effet, chaque tronçon de la vis comporte son propre profil d'entrainement. Chaque profil d'entrainement étant indépendant, l'utilisateur doit actionner tous les profils d'entrainements pour garantir un serrage efficace. L'ordre d'entrainement des différents tronçons est aussi primordial pour garantir un serrage efficace. En outre, plusieurs outils distincts doivent être utilisés pour manoeuvrer respectivement les profils d'entrainements.However, this type of telescopic screw has a number of disadvantages. Indeed, each section of the screw has its own training profile. Each training profile being independent, the user must operate all drive profiles to ensure effective clamping. The drive order of the different sections is also essential to ensure effective clamping. In addition, several separate tools must be used to maneuver the training profiles respectively.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention vise donc à remédier aux inconvénients de l'état de la technique, de manière à proposer une borne à vis ayant une grande capacité de serrage et ayant des dimensions réduites.The invention therefore aims to overcome the disadvantages of the state of the art, so as to provide a screw terminal having a large clamping capacity and having reduced dimensions.

Une borne électrique à vis selon l'invention est définie dans les revendications.An electrical screw terminal according to the invention is defined in the claims.

Elle comprend une tête de manoeuvre ayant un unique profil d'entrainement destiné à collaborer avec un outil externe pour entrainer ensemble en rotation lesdits au moins premier et au moins second tronçons de la vis télescopique via des moyens d'entrainement. De préférence, ledit profil d'entrainement est positionné à une première extrémité dudit au moins un second tronçon cylindrique et la tête de serrage est positionnée à une seconde extrémité dudit au moins un second tronçon cylindrique.It comprises an operating head having a single drive profile intended to collaborate with an external tool to drive together in rotation said at least first and at least second sections of the telescopic screw via drive means. Preferably, said drive profile is positioned at a first end of said at least one second cylindrical section and the clamping head is positioned at a second end of said at least one second cylindrical section.

Les moyens d'entrainement comportent au moins un moyen élastique déformable interposé entre ledit au moins un premier tronçon et ledit au moins un second tronçon et étant apte à se déformer pour solidariser lesdits tronçons.The drive means comprise at least one elastic deformable means interposed between said at least one first section and said at least one second section and being adapted to deform to secure said sections.

Avantageusement, ledit au moins un moyen élastique déformable comprend un anneau fendu interposé entre la paroi interne dudit au moins un premier tronçon et la paroi externe dudit au moins un second tronçon, ledit anneau présentant une surface cylindrique externe en appui contre la paroi interne d'un dudit au moins un premier tronçon.Advantageously, said at least one elastic deformable means comprises a split ring interposed between the inner wall of said at least one first section and the outer wall of said at least one second segment, said ring having an outer cylindrical surface bearing against the inner wall of one of said at least one first section.

Avantageusement, ledit au moins un premier tronçon comporte une paroi interne conique sur laquelle est en appui la surface cylindrique externe dudit anneau, et ledit au moins un second tronçon comporte des moyens de maintien entrainant ledit anneau fendu en translation. Le déplacement du second tronçon entraine le déplacement de la surface cylindrique externe de l'anneau fendu sur la pente du cône pour coincer ledit anneau entre la paroi interne dudit au moins un premier tronçon et la paroi externe dudit au moins un second tronçon.Advantageously, said at least one first section comprises a conical inner wall on which the outer cylindrical surface of said ring bears, and said at least one second section comprises holding means causing said split ring in translation. The displacement of the second section causes the displacement of the outer cylindrical surface of the split ring on the slope of the cone to wedge said ring between the inner wall of said at least one first section and the outer wall of said at least one second section.

Selon un mode particulier de développement, les moyens d'entrainement comportent au moins une surface de frottement entre une surface interne dudit au moins un premier tronçon et une surface externe dudit au moins un second tronçon, ladite surface de frottement autorisant le blocage en rotation d'un tronçon par rapport à l'autre.According to a particular mode of development, the drive means comprise at least one friction surface between an inner surface of said at least one first section and an outer surface of said at least one second section, said friction surface allowing the locking in rotation of one section relative to the other.

Avantageusement, les moyens d'entrainement comportent un système de cône mâle/femelle, une partie femelle étant formée par la surface interne du premier tronçon et une partie male étant formée par la surface externe du second tronçon, ladite au moins une surface de frottement étant située au niveau de la zone de contact entre les parties male et femelle.Advantageously, the drive means comprise a male / female cone system, a female part being formed by the inner surface of the first section and a male part being formed by the outer surface of the second section, the said at least one friction surface being located in the area of contact between the male and female parts.

Avantageusement, les moyens d'entrainement sont destinés à entraîner simultanément ou successivement en rotation l'ensemble des tronçons filetés de la vis de borne télescopique.Advantageously, the drive means are intended to drive simultaneously or successively in rotation all the threaded sections of the telescopic terminal screw.

Selon un mode particulier de réalisation, la vis télescopique comporte deux tronçons, un des tronçons comportant un filetage avec un pas à droite et l'autre tronçon comportant un filetage avec un pas à gauche.According to a particular embodiment, the telescopic screw comprises two sections, one of the sections having a thread with a step to the right and the other section having a thread with a step to the left.

Un bomier selon l'invention comporte au moins une borne électrique à vis telle que définie ci-dessus. Le bomier comporte au moins un volume interne comprenant des moyens de positionnement de la dite au moins une borne à vis dans une première position.A bomier according to the invention comprises at least one electrical screw terminal as defined above. The bomier comprises at least one internal volume comprising means for positioning said at least one screw terminal in a first position.

Avantageusement, les moyens de positionnement sont escamotables pour autoriser le déplacement de ladite au moins une borne électrique dans le volume interne du bomier, déplacement de la première position à une seconde position.Advantageously, the positioning means are retractable to allow the movement of said at least one electrical terminal in the internal volume of the bomier, moving the first position to a second position.

Avantageusement, le bomier comporte plusieurs volumes internes séparés les uns des autres par des joues de séparation isolante.Advantageously, the bomier comprises several internal volumes separated from each other by insulating separation cheeks.

Un appareil électrique selon l'invention comporte un bomier tel que défini ci-dessus. Le bornier comporte un volume interne comprenant des moyens de positionnement destiné à maintenir ladite au moins une borne à vis dans une première position.An electrical apparatus according to the invention comprises a bomier as defined above. The terminal block has an internal volume comprising positioning means for holding said at least one screw terminal in a first position.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et représentés aux dessins annexés sur lesquels :

  • la figure 1 représente, une vue en perspective, d'une borne à vis suivant un mode connu de réalisation ;
  • les figures 2A à 2C représentent, en coupe axiale, d'une borne à vis suivant un mode de réalisation de l'invention dans différentes positions de serrage ;
  • les figures 3A et 3B représentent, en coupe axiale, des vues de détail des moyens d'entrainement de la borne à vis respectivement suivant les figures 2A et 2B ;
  • la figure 4 représente, une vue en perspective, d'une borne à vis suivant un mode de réalisation de l'invention ;
  • les figures 5A et 5B représentent, en coupe axiale, une variante de réalisation d'une borne à vis suivant un mode de réalisation de l'invention dans différentes positions de serrage ;
  • la figure 6 représente, en coupe axiale, un bomier triphasé suivant un mode de réalisation de l'invention ;
  • la figure 7 représente, une vue de détail d'un bornier suivant la figure 6 ;
  • la figure 8 représente, en coupe axiale, un bomier suivant un autre mode de réalisation de l'invention.
Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention, given by way of non-limiting examples, and represented in the accompanying drawings in which:
  • the figure 1 is a perspective view of a screw terminal according to a known embodiment;
  • the FIGS. 2A to 2C represent, in axial section, a screw terminal according to one embodiment of the invention in different clamping positions;
  • the Figures 3A and 3B represent, in axial section, detailed views of the driving means of the screw terminal respectively according to the Figures 2A and 2B ;
  • the figure 4 is a perspective view of a screw terminal according to an embodiment of the invention;
  • the Figures 5A and 5B represent, in axial section, an alternative embodiment of a screw terminal according to one embodiment of the invention in different clamping positions;
  • the figure 6 represents, in axial section, a three-phase bomier according to one embodiment of the invention;
  • the figure 7 represents a detailed view of a terminal block following the figure 6 ;
  • the figure 8 represents, in axial section, a bomier according to another embodiment of the invention.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

En référence aux figures 2A, 2B et 2C, selon un mode préférentiel de réalisation, la borne électrique à vis 1 comporte une cage 5 métallique traversée par un passage allongé destiné à recevoir une plage de connexion 4 d'un appareil électrique. La borne électrique à vis 1 est notamment destinée à relier des appareils électriques de coupure, notamment des disjoncteurs à des conducteurs électriques.With reference to FIGS. 2A, 2B and 2C , according to a preferred embodiment, the electrical screw terminal 1 comprises a metal cage 5 through an elongated passage for receiving a connection pad 4 of an electrical apparatus. The electrical screw terminal 1 is particularly intended to connect electrical switching devices, including circuit breakers to electrical conductors.

La cage 5 comporte un orifice taraudé traversant une paroi de ladite cage. A titre d'exemple de réalisation, la cage 5 est réalisée à partir d'un plat en métal plié sous la forme d'un U. Les deux extrémités des branches du U sont reliées par une traverse métallique dans laquelle est pratiqué l'orifice taraudé.The cage 5 comprises a threaded orifice passing through a wall of said cage. As an exemplary embodiment, the cage 5 is made from a flat metal folded in the form of a U. The two ends of the branches of the U are connected by a metal cross in which is made the orifice tapped.

La borne électrique à vis 1 comporte une vis télescopique 7 destinée à serrer un conducteur électrique 6 et la plage de connexion. La vis télescopique 7 comporte au moins un premier tronçon 7A cylindrique ayant un filetage externe destiné à collaborer avec l'orifice taraudé. Ledit tronçon comporte aussi un filetage interne destiné à collaborer avec un filetage externe d'au moins un second tronçon 7B cylindrique. Les tronçons cylindriques sont coaxiaux et concentriques.The electrical screw terminal 1 comprises a telescopic screw 7 for clamping an electrical conductor 6 and the connection pad. The telescopic screw 7 comprises at least a first cylindrical section 7A having an external thread intended to collaborate with the threaded orifice. Said section also comprises an internal thread intended to collaborate with an external thread of at least a second cylindrical section 7B. The cylindrical sections are coaxial and concentric.

La vis télescopique 7 comporte une tête de manoeuvre 9 destinée à être actionnée pour le vissage de ladite vis.The telescopic screw 7 comprises an operating head 9 intended to be actuated for the screwing of said screw.

La vis télescopique 7 comporte en outre une tête de serrage 8 destinée à appliquer un effort de serrage sur la plage de connexion 4 et le conducteur électrique. La tête de serrage 8 de la vis télescopique 7 comporte un profil de serrage 8A destiné à collaborer avec le conducteur électrique 6 à serrer sur la plage de connexion 4. Le profil de serrage 8A est de préférence positionné à une seconde extrémité dudit au moins un second tronçon 7B cylindrique.The telescopic screw 7 further comprises a clamping head 8 for applying a clamping force to the connection pad 4 and the electrical conductor. The clamping head 8 of the telescopic screw 7 has a clamping profile 8A intended to collaborate with the electrical conductor 6 to be clamped on the connection pad 4. The clamping profile 8A is preferably positioned at a second end of said at least one second section 7B cylindrical.

Selon le mode préférentiel de réalisation, la tête de manoeuvre 9 de la vis télescopique 7 comporte un unique profil d'entrainement 9A. Ledit profil d'entrainement 9A est destiné à collaborer avec un outil externe telle qu'une clef utilisée par un installateur. L'unique profil d'entrainement 9A est de préférence positionné à une première extrémité dudit au moins un second tronçon 7B cylindrique. A titre d'exemple de réalisation représenté sur la figure 4, le profil d'entrainement 9A est creux et a une forme hexagonale.According to the preferred embodiment, the operating head 9 of the telescopic screw 7 comprises a single drive profile 9A. Said training profile 9A is intended to collaborate with an external tool such as a key used by an installer. The single drive profile 9A is preferably positioned at a first end of said at least one second cylindrical section 7B. As an exemplary embodiment shown on the figure 4 , the drive profile 9A is hollow and has a hexagonal shape.

En outre, la tête de manoeuvre 9 comprend des moyens d'entrainement 9B destinés à entrainer ensemble en rotation tous les tronçons 7A, 7B de la vis télescopique 7 par le profil d'entrainement 9A.In addition, the operating head 9 comprises drive means 9B for driving together in rotation all the sections 7A, 7B of the telescopic screw 7 by the drive profile 9A.

Selon ce mode de réalisation, le serrage du conducteur électrique 6 et de la plage de connexion 4 est toujours réalisé par ledit au moins second tronçon 7B via le profil de serrage 8A.According to this embodiment, the tightening of the electrical conductor 6 and the connection pad 4 is always achieved by said at least second section 7B via the clamping profile 8A.

A titre d'exemple de réalisation tel que représenté sur les figures 2A, 2B et 2C" la vis télescopique 7 comporte deux tronçons cylindriques 7A, 7B.By way of example of embodiment as represented on the FIGS. 2A, 2B and 2C "The telescopic screw 7 comprises two cylindrical sections 7A, 7B.

Selon un premier mode particulier développement de l'invention, les moyens d'entrainement 9B de la tête de manoeuvre 9 comportent un moyen élastique déformable interposé entre ledit au moins premier tronçon 7A et ledit au moins second tronçon 7B. Ledit moyen élastique est apte à se déformer pour solidariser lesdits tronçons. La déformation dudit au moins un moyen élastique est générée par le déplacement d'un des deux tronçons 7B. A titre d'exemple de réalisation tel que représenté sur les figures 3A et 3B, ledit moyen élastique déformable comprend un anneau fendu interposé entre la paroi interne dudit au moins un premier tronçon 7A et la paroi externe dudit au moins un second tronçon 7B.According to a first particular embodiment of the invention, the drive means 9B of the actuating head 9 comprise a deformable elastic means interposed between said at least first section 7A and said at least second section 7B. Said resilient means is adapted to deform to secure said sections. The deformation of said at least one elastic means is generated by the displacement of one of the two sections 7B. By way of example of embodiment as represented on the Figures 3A and 3B said deformable elastic means comprises a split ring interposed between the inner wall of said at least one first section 7A and the outer wall of said at least one second section 7B.

Ledit anneau présente une surface cylindrique externe en appui contre la paroi interne d'un dudit au moins un premier tronçon 7A. Ledit au moins un premier tronçon 7A comporte de préférence une paroi interne conique sur laquelle est en appui la surface cylindrique externe dudit anneau.Said ring has an outer cylindrical surface bearing against the inner wall of one of said at least one first section 7A. Said at least one first section 7A preferably comprises a conical inner wall on which the external cylindrical surface of said ring rests.

Ledit au moins un second tronçon 7B comporte des moyens de maintien entraînant ledit anneau fendu en translation. A titre d'exemple de réalisation, la paroi externe dudit au moins second tronçon 7B comporte au moins un épaulement pour solidariser axialement l'anneau fendu audit tronçon. L'anneau fendu est de préférence positionné dans une gorge placée sur le périmètre extérieur dudit au moins second tronçon 7B. Ladite gorge permet l'expansion de l'anneau lors déplacement du second tronçon 7B par rapport au premier.Said at least one second section 7B comprises holding means driving said split ring in translation. As an exemplary embodiment, the outer wall of said at least second section 7B comprises at least one shoulder for axially securing the split ring to said section. The ring split is preferably positioned in a groove placed on the outer perimeter of said at least second section 7B. Said groove allows expansion of the ring during displacement of the second section 7B relative to the first.

Le procédé de serrage d'un conducteur électrique 6 avec la plage de connexion 4 est le suivant. Le déplacement de chaque tronçon se fait entre deux butées de déplacement. Une première butée correspond à une position du tronçon en position desserrée. Une seconde butée correspond à une position du tronçon lorsque ce dernier s'est déplacé sur toute la longueur de son filetage externe d'une position desserrée à une position bloquée. Les butées de déplacement dudit au moins premier tronçon 7A collaborent avec la cage 5 de la borne électrique à vis. Les butées de déplacement dudit au moins second tronçon 7B collaborent de préférence avec ledit au moins premier tronçon 7A.The method of clamping an electrical conductor 6 with the connection pad 4 is as follows. The displacement of each section is between two travel stops. A first stop corresponds to a position of the section in the released position. A second stop corresponds to a position of the section when the latter has moved over the entire length of its external thread from a loosened position to a locked position. The displacement stops of said at least first section 7A cooperate with the cage 5 of the electrical screw terminal. The displacement stops of said at least second section 7B preferably collaborate with said at least first section 7A.

Le déplacement dudit au moins second tronçon 7B, via le profil d'entrainement 9A, entraine le déplacement de la surface cylindrique externe de l'anneau fendu sur la pente du cône pour coincer ledit anneau entre la paroi interne dudit au moins premier tronçon 7A et la paroi externe dudit au moins second tronçon 7B. Le coincement dudit anneau entre les deux parois des deux tronçons 7A, 7B permet de solidariser lesdits deux tronçons de manière à ce que l'entrainement en rotation du second tronçon 7B entraine en rotation le premier tronçon 7A. Autrement dit, le vissage du premier tronçon 7A se fait par l'intermédiaire de l'actionnement du profil d'entrainement 9A placé à l'extrémité du second tronçon 7B cylindrique.The displacement of said at least second section 7B, via the drive profile 9A, causes the displacement of the outer cylindrical surface of the split ring on the slope of the cone to wedge said ring between the inner wall of said at least first section 7A and the outer wall of said at least second section 7B. The jamming of said ring between the two walls of the two sections 7A, 7B makes it possible to secure said two sections so that the rotation drive of the second section 7B rotates the first section 7A. In other words, the screwing of the first section 7A is via the actuation of the drive profile 9A placed at the end of the second section 7B cylindrical.

Le déplacement de la vis télescopique 7 via la tête de manoeuvre 9 entraine le déplacement de tous les tronçons grâce à la présence des moyens d'entrainement 9B et du profil d'entrainement 9A. Dans une première étape, la vis télescopique 7 ne se déploie pas, ledit au moins premier tronçon 7A se déplace entre sa première et seconde butée de déplacement, ledit au moins second tronçon 7B ne se déplaçant pas par rapport audit au moins un premier tronçon 7A. Si le premier tronçon 7A atteint la seconde butée de déplacement et que le serrage entre la plage 4 et le conducteur 6 n'est pas réalisé, le couple de serrage appliqué sur la tête de manoeuvre 9 va entrainer le déploiement du second tronçon 7B qui va à son tour se déplacer entre sa première et seconde butée de déplacement. Les dimensionnements de la cage 5 et de la longueur de la vis télescopique 7 sont réalisés de telle manière que la seconde butée du second tronçon 7B ne soit pas atteinte avant que le serrage soit réalisé.The displacement of the telescopic screw 7 via the actuating head 9 causes the movement of all the sections thanks to the presence of the drive means 9B and the drive profile 9A. In a first step, the telescopic screw 7 does not deploy, said at least first section 7A moves between its first and second displacement stops, said at least second section 7B does not move relative to said at least a first section 7A . If the first section 7A reaches the second displacement stop and the clamping between the range 4 and the conductor 6 is not achieved, the tightening torque applied to the operating head 9 will cause the deployment of the second section 7B which will in turn move between its first and second displacement stop. The dimensions of the cage 5 and the length of the telescopic screw 7 are made such that the second stop of the second section 7B is not reached before the clamping is performed.

Selon un second mode particulier développement de l'invention, les moyens d'entrainement comportent au moins une surface de frottement entre une surface interne dudit au moins un premier tronçon 7A et une surface externe dudit au moins un second tronçon 7B. Ladite surface de frottement autorise le blocage en rotation d'un tronçon par rapport à l'autre. Les moyens d'entrainement comportent ainsi un système de cône mâle/femelle. Une partie femelle est formée par une face interne du premier tronçon 7A et une partie male est formée par la face externe du second tronçon 7B. Ladite au moins une surface de frottement est alors située au niveau de la zone de contact entre les parties male et femelle. Avant utilisation, les tronçons peuvent être liés entre eux en appliquant un couple dans le sens du desserrage via le profil d'entrainement 9A. La surface de frottement joue alors un rôle similaire à celui dudit au moins un moyen élastique déformable décrit ci-dessus.According to a second particular embodiment of the invention, the drive means comprise at least one friction surface between an inner surface of said at least one first section 7A and an outer surface of said at least one second section 7B. Said friction surface allows blocking in rotation of one section relative to the other. The drive means thus comprise a male / female cone system. A female part is formed by an inner face of the first section 7A and a male part is formed by the outer face of the second section 7B. Said at least one friction surface is then located at the contact zone between the male and female parts. Before use, the sections can be linked together by applying a torque in the loosening direction via the drive profile 9A. The friction surface then plays a role similar to that of said at least one deformable elastic means described above.

Ainsi, contrairement aux solutions de l'état de la technique, cet ordre de serrage est imposé par l'utilisation d'un unique profil d'entrainement 9A et la présence des moyens d'entrainement 9B. Cela garantit un serrage effectif du conducteur 6 quelque soit son diamètre.Thus, unlike the solutions of the state of the art, this tightening order is imposed by the use of a single drive profile 9A and the presence of the drive means 9B. This ensures effective clamping of the conductor 6 regardless of its diameter.

Selon une première variante des modes de réalisation de l'invention tel que représenté sur les figures 5A et 5B, la vis télescopique 7 comporte trois tronçons cylindriques. Le fonctionnement pour une vis télescopique 7 à trois tronçons est similaire à celui d'une vis télescopique 7 à deux tronçons.According to a first variant of the embodiments of the invention as represented on the Figures 5A and 5B the telescopic screw 7 has three cylindrical sections. The operation for a telescopic screw 7 with three sections is similar to that of a telescopic screw 7 with two sections.

Selon une autre variante de réalisation, la seconde extrémité dudit au moins second tronçon 7B comporte de préférence un V de serrage. Le V de serrage positionné sensiblement de façon perpendiculaire au tronçon cylindrique permet une meilleure répartition de l'effort de serrage sur le conducteur électrique. Le V de serrage peut être relié à la seconde extrémité du second tronçon 7B via une liaison rotule.According to another embodiment, the second end of said at least second section 7B preferably comprises a clamping V. The clamping V positioned substantially perpendicular to the cylindrical section allows a better distribution of the clamping force on the electrical conductor. The clamping V can be connected to the second end of the second section 7B via a ball joint.

Selon une variante de réalisation, les moyens d'entrainement 9B sont destinés à entrainer simultanément en rotation l'ensemble des tronçons filetés de la vis de borne télescopique.According to an alternative embodiment, the drive means 9B are intended to simultaneously drive in rotation all the threaded sections of the telescopic terminal screw.

Selon une variante de réalisation, les moyens d'entrainement 9B sont destinés à entrainer successivement en rotation l'ensemble des tronçons de la vis de borne télescopique.According to an alternative embodiment, the drive means 9B are intended to drive successively in rotation all the sections of the telescopic terminal screw.

Selon une variante de réalisation, ledit au moins un premier tronçon 7A comporte un filetage interne différent du filetage externe. Le déplacement relatif du premier tronçon 7A dans l'orifice taraudé est alors réalisé à une vitesse différente du déplacement relatif dudit au moins un second tronçon 7B par rapport au premier.According to an alternative embodiment, said at least one first section 7A has an internal thread different from the external thread. The relative displacement of the first section 7A in the threaded orifice is then carried out at a speed different from the relative displacement of the at least one second section 7B relative to the first.

Selon une variante de réalisation, ledit au moins un premier tronçon 7A comporte un filetage interne ayant un pas à droite et un filetage externe ayant un pas à gauche.According to an alternative embodiment, said at least one first section 7A comprises an internal thread having a right pitch and an external thread having a pitch on the left.

Comme représenté sur les figures 6 et 8, l'invention concerne un bomier 2 comportant au moins une borne électrique à vis 1 telle que définie ci-dessous. Le bomier de forme sensiblement parallélépipédique est de préférence réalisé en matériau plastique moulé. Ledit bomier 2 comprend une paroi 20 délimitant au moins un volume interne 21. A l'intérieur du volume interne 21, le bomier comprend des moyens de positionnement 22 de la borne électrique à vis 1 dans une première position. Comme représenté sur les figures 6 à 8, à titre d'exemple de réalisation, le bornier est triphasé et comprend trois volumes internes 21 comprenant respectivement une borne à vis 1. Les volumes internes 21 sont séparés les uns des autres par des joues de séparation 23 en matériau isolant.As shown on figures 6 and 8 the invention relates to a door 2 comprising at least one electrical screw terminal 1 as defined below. The substantially parallelepiped shaped bomier is preferably made of molded plastic material. Said door 2 comprises a wall 20 delimiting at least one internal volume 21. Inside the internal volume 21, the bomier comprises positioning means 22 of the electrical screw terminal 1 in a first position. As shown on Figures 6 to 8 by way of example of embodiment, the terminal block is three-phase and comprises three internal volumes 21 respectively comprising a screw terminal 1. The internal volumes 21 are separated from each other by separation cheeks 23 of insulating material.

Les moyens de positionnement 22 sont de préférence escamotables pour autoriser le positionnement de ladite au moins une borne électrique à vis 1 dans une seconde position. Selon le mode de développement, les moyens de positionnement 22 comportent des petites protubérances moulées dans la paroi du bomier. A titre d'exemple, comme représenté sur la figure 7, chaque volume interne 21 comporte quatre protubérances ayant la forme de demi-colonne placée sur deux parois de chaque volume interne 21.The positioning means 22 are preferably retractable to allow the positioning of said at least one electrical screw terminal 1 in a second position. According to the mode of development, the positioning means 22 comprise small protuberances molded in the wall of the bomier. For example, as shown on the figure 7 , each volume internal 21 has four protuberances in the form of half-column placed on two walls of each internal volume 21.

Comme représenté sur la figure 6, chaque borne électrique à vis 1 est placée dans la première position lorsque le serrage doit être réalisé entre une plage de connexion 4 fixe d'un appareil électrique et un seul conducteur électrique 6.As shown on the figure 6 each electrical screw terminal 1 is placed in the first position when clamping is to be achieved between a fixed connection area 4 of an electrical apparatus and a single electrical conductor 6.

Comme représenté sur la figure 8, chaque borne électrique à vis 1 est placée dans la seconde position lorsque le serrage doit être réalisé entre une plage de connexion 4 fixe d'un appareil électrique et deux conducteurs électriques 6.As shown on the figure 8 each electrical screw terminal 1 is placed in the second position when clamping is to be achieved between a fixed connection area 4 of an electrical apparatus and two electrical conductors 6.

Pour passer de la première position à la seconde position l'utilisateur doit dévisser la vis télescopique 7 à l'aide d'un outil. Dans un premier temps, ladite vis se déplace et vient en appui sur la paroi 20 du bomier 2. Dans un second temps, la vis ne pouvant plus se déplacer, la cage métallique 5 se déplace alors dans la direction opposée matant les moyens de positionnement 22. Les moyens de positionnement 22 s'écrasent et autorisent le déplacement de la cage 5 qui atteint la seconde position. La capacité de serrage de la borne est alors maximum.To move from the first position to the second position the user must unscrew the telescopic screw 7 with a tool. In a first step, said screw moves and comes to rest on the wall 20 of the block 2. In a second step, the screw can no longer move, the metal cage 5 then moves in the opposite direction matting the positioning means 22. The positioning means 22 crash and allow the displacement of the cage 5 which reaches the second position. The clamping capacity of the terminal is then maximum.

L'invention concerne un appareil électrique, notamment un appareil électrique de coupure tel qu'un contacteur, disjoncteur ou interrupteur. Ledit appareil comporte au moins un bomier 2 tel que défini ci-dessous. Ledit bomier 2 a un volume interne comprenant des moyens de positionnement 22 destinés à maintenir ladite au moins une borne à vis 1 dans une première position. En outre, ledit appareil comporte des moyens d'accroche autorisant une fixation amovible du bornier 2 sur ledit appareil.The invention relates to an electrical apparatus, in particular an electric switching device such as a contactor, circuit breaker or switch. Said apparatus comprises at least one bomier 2 as defined below. Said door 2 has an internal volume comprising positioning means 22 for holding said at least one screw terminal 1 in a first position. In addition, said apparatus comprises attachment means allowing a removable attachment of the terminal block 2 on said apparatus.

Claims (11)

  1. Electric screw terminal (1) comprising:
    - a metal cage (5) through which there passes an elongate passage intended to accept a connection lug (4) of an electrical device and comprising a tapped orifice passing through a wall of the said cage, and
    - a telescopic screw (7) passing through the tapped orifice and comprising:
    - at least a first cylindrical portion (7A) having an external screwthread intended to engage with the tapped orifice and having an internal screwthread intended to engage with an external screwthread of at least a second cylindrical portion (7B),
    - an operating head (9) comprising a drive profile (9A) intended to engage with an external tool for operating the telescopic screw (7),
    - a clamping head (8) intended to clamp an electrical conductor (6) and the connection lug (4),
    characterized in that the operating head (9) comprises a single drive profile (9A) positioned at a first end of the said at least one second cylindrical portion (7B), the said drive profile being intended to engage with an external tool so as to drive together in rotation the said at least first and second portions (7A, 7B) via drive means (9B), the said drive means (9B) comprising a deformable elastic means interposed between the said at least one first portion (7A) and the said at least one second portion (7B) and being able to deform so as to secure the said portions together, the clamping head (8) being positioned at a second end of the said at least one second cylindrical portion (7B).
  2. Electric screw terminal according to Claim 1, characterized in that the said deformable elastic means comprises a split ring interposed between the internal wall of the said at least one first portion (7A) and the external wall of the said at least one second portion (7B), the said ring having an external cylindrical surface pressing against the internal wall of one of the said at least one first portion.
  3. Electric screw terminal according to Claim 2, characterized in that:
    - the said at least one first portion (7A) comprises a tapering internal wall against which the external cylindrical surface of the said ring presses, and
    - the said at least one second portion (7B) comprises retaining means that drive the said split ring in translation,
    the movement of the second portion (7B) causing the movement of the external cylindrical surface of the split ring along the slope of the taper so as to wedge the said ring between the internal wall of the said at least one first portion (7A) and the external wall of the said at least one second portion (7B).
  4. Electric screw terminal according to Claim 1, characterized in that the drive means (9B) comprise at least one friction surface for friction between an internal surface the said at least one first portion (7A) and an external surface the said at least one second portion (7B), the said friction surface allowing one portion to be prevented from rotating relative to the other.
  5. Electric screw terminal according to Claim 4, characterized in that the drive means comprise a male/female taper system, a female part being formed by the internal surface of the first portion (7A) and a male part being formed by the external surface of the second portion (7B), the said at least one friction surface being situated at the region of contact between the male and female parts.
  6. Electric screw terminal according to any one of the preceding claims, characterized in that the drive means (9B) are intended to drive simultaneously or successively in rotation the assembly of the threaded portions of the telescopic terminal screw.
  7. Electric screw terminal according to any one of the preceding claims, characterized in that the telescopic screw comprises two portions (7A, 7B), one of the portions comprising a right-hand thread and the other portion comprising a left-hand thread.
  8. Terminal block comprising at least one electric screw terminal (1) according to Claims 1 to 7, characterized in that it comprises at least one internal volume (21) comprising positioning means (22) for positioning the said at least one screw terminal (1) in a first position.
  9. Terminal block according to Claim 8, characterized in that the positioning means (22) are retractable so as to allow said at least one electrical terminal (1) to move in the internal volume (21), the movement being from the first position into a second position.
  10. Terminal block according to Claim 8 or 9, characterized in that it comprises several internal volumes (21) separated from one another by insulating dividing flanges (23).
  11. Electrical device comprising at least one terminal block according to Claims 8 to 10, characterized in that the terminal block (2) has an internal volume (21) comprising positioning means (22) intended to keep the said at least one screw terminal (1) in a first position.
EP09793999.5A 2008-06-30 2009-05-18 Electric terminal with a screw, terminal board including such an electric terminal, and electric appliance including such a terminal board Active EP2304848B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0803646A FR2933242B1 (en) 2008-06-30 2008-06-30 ELECTRICAL SCREW TERMINAL, TERMINAL COMPRISING SUCH AN ELECTRICAL TERMINAL AND ELECTRICAL DEVICE COMPRISING SUCH A TERMINAL TERMINAL
PCT/FR2009/000587 WO2010004100A1 (en) 2008-06-30 2009-05-18 Electric terminal with a screw, terminal board including such an electric terminal, and electric appliance including such a terminal board

Publications (2)

Publication Number Publication Date
EP2304848A1 EP2304848A1 (en) 2011-04-06
EP2304848B1 true EP2304848B1 (en) 2016-03-30

Family

ID=40326331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09793999.5A Active EP2304848B1 (en) 2008-06-30 2009-05-18 Electric terminal with a screw, terminal board including such an electric terminal, and electric appliance including such a terminal board

Country Status (6)

Country Link
US (1) US8157603B2 (en)
EP (1) EP2304848B1 (en)
CN (1) CN102138254B (en)
ES (1) ES2569106T3 (en)
FR (1) FR2933242B1 (en)
WO (1) WO2010004100A1 (en)

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FR3035272B1 (en) * 2015-04-15 2019-03-22 Airbus CONNECTING PIECE FOR AN ELECTRICAL CONNECTION
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Also Published As

Publication number Publication date
CN102138254B (en) 2013-12-18
FR2933242B1 (en) 2010-08-27
EP2304848A1 (en) 2011-04-06
WO2010004100A1 (en) 2010-01-14
US20110159749A1 (en) 2011-06-30
US8157603B2 (en) 2012-04-17
ES2569106T3 (en) 2016-05-06
CN102138254A (en) 2011-07-27
FR2933242A1 (en) 2010-01-01

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