WO2015082729A1 - Clamping element - Google Patents

Clamping element Download PDF

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Publication number
WO2015082729A1
WO2015082729A1 PCT/ES2013/070843 ES2013070843W WO2015082729A1 WO 2015082729 A1 WO2015082729 A1 WO 2015082729A1 ES 2013070843 W ES2013070843 W ES 2013070843W WO 2015082729 A1 WO2015082729 A1 WO 2015082729A1
Authority
WO
WIPO (PCT)
Prior art keywords
tightening
mouth
connector
clamping element
head
Prior art date
Application number
PCT/ES2013/070843
Other languages
Spanish (es)
French (fr)
Inventor
Joaquim RIERA CAPELLES
Original Assignee
Niled, S.A.E.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Niled, S.A.E. filed Critical Niled, S.A.E.
Priority to PCT/ES2013/070843 priority Critical patent/WO2015082729A1/en
Priority to EP13898543.7A priority patent/EP3079206B1/en
Priority to ES13898543T priority patent/ES2798188T3/en
Publication of WO2015082729A1 publication Critical patent/WO2015082729A1/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
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the 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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5202—Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings

Definitions

  • the invention relates to a pre-assembled clamping element of those that are mounted inside a mouth or hole arranged / or transversely in a connector, said connector consisting of a connection element specially designed for the tightening of one or more electrical cables that are introduced longitudinally inside by one or more clamping elements.
  • the connectors that allow splices, derivations or terminations preferably metallic, whose body is tubular, generally cylindrical, which is affected by one or more holes or holes that cross the wall of said body in order to immobilize in its interior by means of respective clamping elements to one or more electric cables of the same or different diameter that run longitudinally inside the connector.
  • the tightening elements exert a certain tightening torque on the outside of the electrical cable to make the electrical connection with said cable.
  • the clamping elements are designed so that when the expected tightening torque is exceeded, they end up breaking when they have been provided in a throttle zone, preferably annular, which determine the force of the tightening torque to be applied against the cable inside the connector, where part of the element is broken.
  • Some clamping elements configured with the additional function of ensuring an adequate degree of tightness to prevent any fluid from entering the connector, such as water, are also known.
  • said double function of the clamping elements presents technical difficulties, since the known clamping elements are configured by a clamping screw provided with sealing means attached thereto such as an O-ring, so that when threading the tightening screw in the mouth of a connector to make an electrical contact with the electric cable, said sealing means are rubbing against the inner walls of said mouth and said frictional force causes that when trying to maximize the tightness the axial pressure on the electrical cable, so that the electrical contact with said cable is carried out in conditions of transmission of the tightening torque lower than normal.
  • the main objective of the present invention is to design a clamping element adapted to be mounted inside a mouth or hole arranged / or transversely in a connector into which one or more electric cable / s are mounted, capable of on the one hand make an optimal electrical contact of the clamping element with the electric cable and on the other make an optimal tight seal of the clamping element in the connector.
  • Another objective of the present invention is to design a clamping element that can be easily manufactured in series with low manufacturing costs, to subsequently be assembled the pre-assembled assembly into a connector.
  • Another objective of the present invention is to design a pre-assembled clamping element that is easily mountable by an operator in the mouth of a connector.
  • the present invention consists of a pre-assembled clamping element of which a mouthpiece transversely arranged in a connector is mounted inside which one or more electric cable / s is mounted, said mouthpiece being provided in its lower part of a threaded part for threaded immobilization of the clamping element.
  • the pre-assembled clamping element of the invention It is formed by a set comprising:
  • a clamping means that are configured so as to act on them a tightening torque is exerted that is transmitted axially and that at the top of said assembly by its lower end against the electric cable the applied tightening torque "Pl" achieves an optimum electrical contact with said electrical cable; and other means of tightening that are configured so that, once said optimum electrical contact has been made, when acting on them, a tightening torque is exerted that is transmitted radially against the inner walls of the mouth and that said tightening torque "P2 "is suitable for achieving an optimum tight seal of the clamping element in said connector mouth.
  • This particular configuration of the clamping element allows that once pre-assembled it is mounted in the mouth of a connector by means of two simple and consecutive mounting operations acting on the two clamping means, so that two different functions are achieved at the same time: on the one hand, an optimal electrical contact with the electric cable and on the other hand an optimal tight seal of the clamping element in the mouth.
  • the transmission of the radial tightening torque of the assembly is carried out by means of a sealing gasket.
  • the pre-assembled tightening assembly comprises:
  • tightening means formed by a tightening screw provided with a head adapted to be threaded inside the mouth until it stops at its lower end against the electric cable that runs through the inside of the connector and manages to exert on it a certain axial tightening torque "Pl" to make an optimal electrical contact with the cable, and said tightening screw being provided with fastening means of a tightening nut;
  • the axial pressure "pl" of the tightening screw against the electric cable is achieved by applying a tightening torque "Pl” on the head of the tightening screw in a first threading operation.
  • the radial pressure ⁇ ⁇ 2 "of the sealing gasket against the inner walls of the mouth is achieved by applying a tightening torque" P2 "on the head of the tightening nut in a second threading operation that is transmitted to the sealing gasket , which is supported by its lower part to the connector, so that said tightening torque axially contracts the sealing gasket and consequently generates a radial force "P2" against the inner walls of the mouthpiece achieving the tight seal.
  • the fastening means of the tightening nut provided in the tightening screw can be a threaded part provided on the outer surface of the tightening screw and the corresponding coaxial threaded part of the inner surface of the nut.
  • Both the tightening screw and the tightening nut comprise means of weakening between their body and their respective heads, so that when threading said heads until the end they are broken by said means of weakening.
  • the pre-assembled assembly can incorporate two clamping washers arranged above and below the sealing gasket, adapted to press said upper and lower ends respectively.
  • the pre-assembled assembly can also incorporate in its lower part a toe cap attached to the clamping screw and adapted to make electrical contact with the cable, said piece being able to be adapted to the material and / or the type of each conductor in order to make an optimum Metal-to-metal electrical contact, due to the wide variety of materials (for example aluminum or copper) and cable types (solid, flexible, etc.).
  • the pre-assembled assembly can optionally incorporate an O-ring into the clamping nut, to improve the tightness of the clamping assembly.
  • Figure 1 illustrates a front view of a conventional clamping element mounted transversely on a connector, specifically threaded into one of its openings until making electrical contact with an electric cable.
  • Figure 2 illustrates a side view of the clamping element (10) of the invention.
  • Figure 3 illustrates a side view sectioned by A-A 'of the clamping element (10) of the invention.
  • Figure 4 illustrates a bottom plan view of the clamping element (10) of the invention.
  • Figure 5 illustrates a top plan view of the clamping element (10) of the invention.
  • Figure 6 illustrates a front perspective view of the clamping element (10) of the invention.
  • Figure 7 illustrates the same side view of the clamping element (10) of the invention of Figure 2 but in an exploded manner.
  • Figure 8 illustrates the same sectional side view of the clamping element (10) of the invention of Figure 3 but in an exploded manner.
  • Figure 9 illustrates the same front perspective view of the clamping element (10) of the invention of Figure 6 but in an exploded manner.
  • Figure 10 illustrates a side view of two clamping elements (10) that begin to be mounted transversely in respective openings (12) of a connector (11).
  • Figure 11 illustrates a C-C sectioned front view of the two clamping elements (10) of Figure 10.
  • Figure 12 illustrates a front perspective view of the two clamping elements (10) of Figure 10.
  • FIG. 13 to 15 illustrate front elevational views of the various consecutive mounting positions of a clamping element (10, 10 ', 10'') in the mouth (12) of a connector (11). Description of a preferred embodiment of the invention:
  • FIG. 1 a known clamping element is illustrated on whose outer surface an O-ring (38) is mounted, so that when the clamping element is threaded into the mouth (12) of a connector (11) ) to make an electrical contact with one or more electric cables (13), said O-ring (38) is exerting a frictional force against the inner walls (16) of said mouth (12), thereby causing the electrical contact with said cable (13) is defective.
  • the clamping element (10) is formed by a pre-assembled assembly consisting of a clamping screw (17) mounted inside a tightening nut (19), a sealing gasket (21) mounted on the bottom of the tightening nut (19) and two washers (22) mounted above and below said sealing gasket (twenty-one) .
  • the clamping screw (17) has a head (18) for threading the same inside the mouth by its threaded portion (15) until it stops at its bottom base (35) against an electric cable (13), being provided between the body and head (18) a narrowing (39) as a weakening surface (see figures 3 and 8), so that when threading said head (18) until the end it is broken by this point, as can be seen in figure n ° 14.
  • the clamping screw (17) presents in the outer surface of its body a threaded part (25) adapted to be threaded into the corresponding threaded part (26) of the inner surface of the tightening nut (19), and thus achieve the solidarity of the tightening nut (19) in the tightening screw (17).
  • the tightening nut (19) has a head (20) for threading it against the sealing gasket (21) arranged below the lower base of the nut (19).
  • a toe cap (23) attached inferiorly to the clamping screw (17) is incorporated by means of a threaded portion (27) provided at the bottom of the clamping screw (17) that threads into a corresponding internal threaded portion of the toe ( 23), the function of the toe (23) being that of doing electrical contact with the cable (13), see figures n ° 2 to 9.
  • the toe cap (23) has an external thread (29) for threading in (15).
  • An O-ring (24) is also optionally incorporated in the clamping nut (19), to improve the tightness of the clamping element (10), see figures 2 to 9.
  • both the tightening nut (19), the sealing gasket (21), the washers (22) and the toe (23) have respective holes (30, 31, 32, 33) in the axial direction said holes (30, 31, 32) being through except the hole (33) which is blind, see figure 9.
  • FIG. 10 A possible embodiment of a connector (11) with two openings (12) on which respective clamping elements (10) begin to be mounted is illustrated in Figures 10 to 12.
  • Figure 13 shows the position of insertion of the clamping element (10) inside a mouth (12) of a connector (11) in the first assembly operation
  • Figure 14 shows the maximum threading position of the clamping element (10) inside the mouth (12) of the connector (11) at the end of the first assembly operation in which an optimal downward axial force "pl” is applied which causes the head to break ( 18) of the tightening screw
  • figure 15 shows the maximum threading position of the tightening nut (19) on the sealing gasket (21) in the second assembly operation that causes the head to break (20) of the tightening nut (19) and the generation of a Optimal radial force "p2" in both directions that makes the seal completely tight.

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  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The invention relates to a pre-mounted clamping element of the type that is mounted inside a mouth or opening arranged transversely in a connector, and especially designed for clamping at least one electric cable inserted longitudinally inside the connector. The clamping element according to the invention is designed such that once it is mounted in the connector, it establishes an optimum electrical contact with the electric cable and also forms an optimum tight seal in the connector.

Description

"ELEMENTO DE APRIETE"  "TIGHTENING ELEMENT"
- Memoria Descriptiva -  - Descriptive memory -
Campo de la invención: Field of the invention:
Más concretamente la invención se refiere a un elemento de apriete pre-montado de los que se montan en el interior de una embocadura u orificio dispuesta/o transversalmente en un conector, consistiendo el citado conector en un elemento de conexión especialmente diseñado para el apriete de uno o más cables eléctricos que se introducen longitudinalmente en su interior mediante uno o más elementos de apriete.  More specifically, the invention relates to a pre-assembled clamping element of those that are mounted inside a mouth or hole arranged / or transversely in a connector, said connector consisting of a connection element specially designed for the tightening of one or more electrical cables that are introduced longitudinally inside by one or more clamping elements.
Estado de la Técnica: State of the Art:
Son ampliamente conocidos los conectores que permiten realizar empalmes, derivaciones o terminaciones, preferentemente metálicos, cuyo cuerpo es tubular, generalmente cilindrico, el cual está afectado por uno o mas orificios o taladros que atraviesan transversalmente la pared de dicho cuerpo con el fin de inmovilizar en su interior mediante respectivos elementos de apriete a uno o más cables eléctricos de igual o distinto diámetro que discurren longitudinalmente en el interior del conector.  The connectors that allow splices, derivations or terminations, preferably metallic, whose body is tubular, generally cylindrical, which is affected by one or more holes or holes that cross the wall of said body in order to immobilize in its interior by means of respective clamping elements to one or more electric cables of the same or different diameter that run longitudinally inside the connector.
Existen en el mercado gran variedad de conectores mecánicos por tornilleria mediante muy variados tipos de tornillos de apriete del cable introducido por uno o ambos extremos del conector eléctrico, entre los cuales se encuentran, por ejemplo, las patentes españolas del mismo titular n° 200502821, 200600568, 200600954, y 200602698.  There are a wide variety of mechanical connectors on the market by means of very different types of cable tightening screws introduced by one or both ends of the electrical connector, among which are, for example, Spanish patents of the same holder n ° 200502821, 200600568, 200600954, and 200602698.
En general, se busca que los elementos de apriete ejerzan un par de apriete determinado sobre la parte exterior del cable eléctrico para hacer la conexión eléctrica con dicho cable. Para conseguir la función de conectar eléctricamente el elemento de apriete con el cable, los elementos de apriete se diseñan de manera que al superarse el par de apriete previsto, los mismos se acaban rompiendo al haber previsto en los mismos de una zona de estrangulamiento, preferentemente anular, que determinan la fuerza del par de apriete a aplicar contra el cable alojado en el interior del conector, por donde se rompe parte del elemento. In general, it is sought that the tightening elements exert a certain tightening torque on the outside of the electrical cable to make the electrical connection with said cable. In order to achieve the function of electrically connecting the clamping element with the cable, the clamping elements are designed so that when the expected tightening torque is exceeded, they end up breaking when they have been provided in a throttle zone, preferably annular, which determine the force of the tightening torque to be applied against the cable inside the connector, where part of the element is broken.
También se conocen algunos elementos de apriete configurados con la función adicional de asegurar un grado de estanqueidad adecuado para evitar que pueda penetrar cualquier fluido en el conector, tal como agua. En la actualidad, dicha doble función de los elementos de apriete presenta dificultades técnicas, puesto que los elementos de aprietes conocidos están configurados por un tornillo de apriete provisto de medios de estanqueidad sujetos al mismo tal como una junta tórica, de modo que al roscar el tornillo de apriete en la embocadura de un conector para efectuar un contacto eléctrico con el cable eléctrico, dichos medios de estanqueidad van rozando contra las paredes interiores de dicha embocadura y dicha fuerza de rozamiento provoca que al intentar maximizar la estanqueidad se disminuya la presión axial sobre el cable eléctrico, de modo que el contacto eléctrico con dicho cable se realiza en condiciones de transmisión del par de apriete inferiores a las normales.  Some clamping elements configured with the additional function of ensuring an adequate degree of tightness to prevent any fluid from entering the connector, such as water, are also known. At present, said double function of the clamping elements presents technical difficulties, since the known clamping elements are configured by a clamping screw provided with sealing means attached thereto such as an O-ring, so that when threading the tightening screw in the mouth of a connector to make an electrical contact with the electric cable, said sealing means are rubbing against the inner walls of said mouth and said frictional force causes that when trying to maximize the tightness the axial pressure on the electrical cable, so that the electrical contact with said cable is carried out in conditions of transmission of the tightening torque lower than normal.
Por lo tanto, dicha doble función del elemento de apriete no se puede lograr en condiciones óptimas con las configuraciones de elementos de aprietes conocidos hasta la fecha. Therefore, said double function of the clamping element cannot be achieved under optimal conditions with configurations of tightening elements known to date.
Objetivo de la invención: Objective of the invention:
El objetivo principal de la presente invención es diseñar un elemento de apriete adaptado para montarse en el interior una embocadura u orificio dispuesta/o transversalmente en un conector dentro del cual se monta uno o más cable/s eléctrico/s, capaz de por un lado hacer un óptimo contacto eléctrico del elemento de apriete con el cable eléctrico y por otro hacer un óptimo cierre estanco del elemento de apriete en el conector .  The main objective of the present invention is to design a clamping element adapted to be mounted inside a mouth or hole arranged / or transversely in a connector into which one or more electric cable / s are mounted, capable of on the one hand make an optimal electrical contact of the clamping element with the electric cable and on the other make an optimal tight seal of the clamping element in the connector.
Otro objetivo de la presente invención es diseñar un elemento de apriete que se pueda fabricar fácilmente en serie con unos costes de fabricación bajos, para posteriormente ser montado el conjunto pre-montado en un conector .  Another objective of the present invention is to design a clamping element that can be easily manufactured in series with low manufacturing costs, to subsequently be assembled the pre-assembled assembly into a connector.
Otro objetivo de la presente invención es diseñar un elemento de apriete pre-montado que sea fácilmente montable por un operario en la embocadura de un conector .  Another objective of the present invention is to design a pre-assembled clamping element that is easily mountable by an operator in the mouth of a connector.
Descripción de la invención : Description of the invention:
La presente invención consiste en un elemento de apriete pre-montado de los que se montan en el interior una embocadura dispuesta transversalmente en un conector dentro del cual se monta uno o más cable/s eléctrico/s, estando provista dicha embocadura en su parte inferior de una parte roscada para la inmovilización por roscado del elemento de apriete.  The present invention consists of a pre-assembled clamping element of which a mouthpiece transversely arranged in a connector is mounted inside which one or more electric cable / s is mounted, said mouthpiece being provided in its lower part of a threaded part for threaded immobilization of the clamping element.
El elemento de apriete pre-montado de la invención está formado por un conjunto que comprende: The pre-assembled clamping element of the invention It is formed by a set comprising:
unos medios de apriete que están configurados de modo al actuar sobre los mismos se ejerza un par de apriete que se transmite axialmente y que al hace tope dicho conjunto por su extremo inferior contra el cable eléctrico el par de apriete aplicado "Pl" consigue un óptimo contacto eléctrico con dicho cable eléctrico; y otros medios de apriete que están configurados de modo que, una vez efectuado dicho óptimo contacto eléctrico, al actuar sobre los mismos se ejerza un par de apriete que se transmite radialmente contra las paredes interiores de la embocadura y que dicho par de apriete "P2" sea adecuado para conseguir un óptimo cierre estanco del elemento de apriete en dicha embocadura del conector.  a clamping means that are configured so as to act on them a tightening torque is exerted that is transmitted axially and that at the top of said assembly by its lower end against the electric cable the applied tightening torque "Pl" achieves an optimum electrical contact with said electrical cable; and other means of tightening that are configured so that, once said optimum electrical contact has been made, when acting on them, a tightening torque is exerted that is transmitted radially against the inner walls of the mouth and that said tightening torque "P2 "is suitable for achieving an optimum tight seal of the clamping element in said connector mouth.
Esta particular configuración del elemento de apriete permite que una vez pre-montado se monte en la embocadura de un conector mediante dos operaciones de montaje sencillas y consecutivas actuando sobre los dos medios de apriete, de manera que se consigan dos funciones distintas a la vez: por un lado un óptimo contacto eléctrico con el cable eléctrico y por otro lado un óptimo cierre estanco del elemento de apriete en la embocadura.  This particular configuration of the clamping element allows that once pre-assembled it is mounted in the mouth of a connector by means of two simple and consecutive mounting operations acting on the two clamping means, so that two different functions are achieved at the same time: on the one hand, an optimal electrical contact with the electric cable and on the other hand an optimal tight seal of the clamping element in the mouth.
Preferentemente la transmisión del par de apriete radial del conjunto se realiza por intermedio de una junta de estanqueidad.  Preferably, the transmission of the radial tightening torque of the assembly is carried out by means of a sealing gasket.
Conforme una realización práctica preferida de la presente invención, el conjunto de apriete pre-montado comprende:  According to a preferred practical embodiment of the present invention, the pre-assembled tightening assembly comprises:
unos medios de apriete formados por un tornillo de apriete provisto de una cabeza adaptado para ser roscado en el interior de la embocadura hasta hacer tope por su extremo inferior contra el cable eléctrico que discurre por el interior del conector y logra ejercer sobre el mismo un par de apriete axial determinado "Pl" para hacer un óptimo contacto eléctrico con el cable, y estando provisto dicho tornillo de apriete de unos medios de sujeción de una tuerca de apriete; y tightening means formed by a tightening screw provided with a head adapted to be threaded inside the mouth until it stops at its lower end against the electric cable that runs through the inside of the connector and manages to exert on it a certain axial tightening torque "Pl" to make an optimal electrical contact with the cable, and said tightening screw being provided with fastening means of a tightening nut; Y
otros medios de apriete formados por una tuerca de apriete provista de una cabeza adaptada para ser roscada sobre una junta de estanqueidad hasta generar dicha junta de estanqueidad una presión radial ρ2" adecuada para hacer un cierre estanco contra las paredes interiores de la parte superior de la embocadura.  other means of tightening formed by a tightening nut provided with a head adapted to be threaded onto a sealing gasket until said sealing gasket generates a radial pressure ρ2 "suitable to make a tight seal against the inner walls of the upper part of the mouthpiece.
La presión axial "pl" del tornillo de apriete contra el cable eléctrico se consigue aplicando un par de apriete "Pl" sobre la cabeza del tornillo de apriete en una primera operación de roscado.  The axial pressure "pl" of the tightening screw against the electric cable is achieved by applying a tightening torque "Pl" on the head of the tightening screw in a first threading operation.
La presión radial λρ2" de la junta de estanqueidad contra las paredes interiores de la embocadura se consigue aplicando un par de apriete "P2" sobre la cabeza de la tuerca de apriete en una segunda operación de roscado que se transmite a la junta de estanqueidad, la cual está apoyada por su parte inferior al conector, de modo que dicho par de apriete contrae axialmente la junta de estanqueidad y consecuentemente genera una fuerza radial "P2" contra las paredes interiores de la embocadura logrando el cierre estanco. The radial pressure λ ρ2 "of the sealing gasket against the inner walls of the mouth is achieved by applying a tightening torque" P2 "on the head of the tightening nut in a second threading operation that is transmitted to the sealing gasket , which is supported by its lower part to the connector, so that said tightening torque axially contracts the sealing gasket and consequently generates a radial force "P2" against the inner walls of the mouthpiece achieving the tight seal.
Los medios de sujeción de la tuerca de apriete provistos en el tornillo de apriete pueden ser una parte roscada provista en la superficie exterior del tornillo de apriete y la correspondiente parte roscada coaxial de la superficie interior de la tuerca. Tanto el tornillo de apriete como la tuerca de apriete comprenden unos medios de debilitación entre sus cuerpo y sus respectivas cabezas, para que al roscar dichas cabezas hasta el final las mismas se rompan por dicho medios de debilitación. The fastening means of the tightening nut provided in the tightening screw can be a threaded part provided on the outer surface of the tightening screw and the corresponding coaxial threaded part of the inner surface of the nut. Both the tightening screw and the tightening nut comprise means of weakening between their body and their respective heads, so that when threading said heads until the end they are broken by said means of weakening.
Opcionalmente el conjunto pre-montado puede incorporar dos arandelas de apriete dispuestas por encima y por debajo de la junta de estanqueidad, adaptadas para presionar por sus extremos superior e inferior respectivamente dicha junta.  Optionally, the pre-assembled assembly can incorporate two clamping washers arranged above and below the sealing gasket, adapted to press said upper and lower ends respectively.
También opcionalmente el conjunto pre-montado puede incorporar en su parte inferior una puntera sujeta al tornillo de apriete y adaptada para hacer contacto eléctrico con el cable, pudiendo estar adaptada dicha pieza al material y/o a la tipoloqia de cada conductor para asi efectuar una óptimo contacto eléctrico metal contra metal, debido a la gran variedad de materiales (por ejemplo de aluminio o cobre) y tipos de cables (macizos, flexibles, etc.).  Optionally, the pre-assembled assembly can also incorporate in its lower part a toe cap attached to the clamping screw and adapted to make electrical contact with the cable, said piece being able to be adapted to the material and / or the type of each conductor in order to make an optimum Metal-to-metal electrical contact, due to the wide variety of materials (for example aluminum or copper) and cable types (solid, flexible, etc.).
También opcionalmente el conjunto pre-montado puede incorporar en la tuerca de apriete una junta tórica, para mejorar la estanqueidad del conjunto de apriete.  Also, the pre-assembled assembly can optionally incorporate an O-ring into the clamping nut, to improve the tightness of the clamping assembly.
Otros detalles y características se irán poniendo de manifiesto en el transcurso de la descripción que se da, en los que se hace referencia a los dibujos que a esta memoria se acompañan, en los que se muestra a título ilustrativo pero no limitativo una representación gráfica de la invención, teniendo en cuenta que las realizaciones de la invención podrán ser de cualquier material, en relación a la composición, así como su configuración exterior no crítica. Descripción de las figuras : Other details and features will be revealed in the course of the description given, in which reference is made to the accompanying drawings, which are shown by way of illustration but not limited to a graphic representation of the invention, taking into account that the embodiments of the invention may be of any material, in relation to the composition, as well as its non-critical exterior configuration. Description of the figures:
Sigue a continuación una relación de las distintas partes de la invención que se encuentran en los planos y que se localizan mediante los números que siguen; (10, 10', 10'') elemento de apriete, (11) conector, (12) embocadura del conector, (13) cable eléctrico, (14) elemento de apriete conocido, (15) parte roscada de la embocadura, (16) paredes interiores de la embocadura, (17) tornillo de apriete, (18) cabeza del tornillo de apriete, (19) tuerca de apriete, (20) cabeza de la tuerca de apriete, (21) junta de estanqueidad, (22) arandelas de apriete, (23) puntera, (24) junta tórica, (25) parte roscada exterior superior del tornillo de apriete, (26) parte roscada interior de la tuerca, (27) parte roscada exterior inferior del tornillo de apriete, (28) parte roscada interior de la puntera, (29) parte roscada exterior de la puntera, (30) orificio pasante de la tuerca de apriete, (31) orificio pasante de la arandela, (32) orificio pasante de la junta de estanqueidad, (33) orificio ciego de la puntera, (35) base inferior de la puntera, (36) superficie de tope de la embocadura, (37) base inferior de la arandela inferior, (38) junta tórica, (39) paredes interiores de la embocadura, (39) estrechamiento en el tornillo de apriete, (40) estrechamiento en 1 tuerca de apriete.  Following is a list of the different parts of the invention that are found in the plans and that are located by the following numbers; (10, 10 ', 10' ') clamping element, (11) connector, (12) connector mouth, (13) electrical cable, (14) known clamping element, (15) threaded part of the mouthpiece, ( 16) inner walls of the mouth, (17) tightening screw, (18) head of the tightening screw, (19) tightening nut, (20) head of the tightening nut, (21) sealing gasket, (22) ) tightening washers, (23) toe cap, (24) o-ring, (25) upper outer threaded part of the tightening screw, (26) inner threaded part of the nut, (27) lower outer threaded part of the tightening screw, (28) internal threaded part of the toe, (29) external threaded part of the toe, (30) through hole of the tightening nut, (31) through hole of the washer, (32) through hole of the sealing gasket , (33) blind hole of the toe, (35) lower base of the toe, (36) stop surface of the mouth, (37) lower base of the lower washer, (38) o-ring, (39) inner walls of the mouth, (39) narrowing in the tightening screw, (40) narrowing in 1 tightening nut.
En las figuras: In the figures:
La figura n° 1 ilustra una vista frontal de un elemento de apriete convencional montado transversalmente en un conector, concretamente roscado en una de sus embocaduras hasta hacer contacto eléctrico con un cable eléctrico.  Figure 1 illustrates a front view of a conventional clamping element mounted transversely on a connector, specifically threaded into one of its openings until making electrical contact with an electric cable.
La figura n° 2 ilustra una vista lateral del elemento de apriete (10) de la invención. Figure 2 illustrates a side view of the clamping element (10) of the invention.
La figura n° 3 ilustra una vista lateral seccionada por A-A' del elemento de apriete (10) de la invención.  Figure 3 illustrates a side view sectioned by A-A 'of the clamping element (10) of the invention.
La figura n° 4 ilustra una vista en planta inferior del elemento de apriete (10) de la invención.  Figure 4 illustrates a bottom plan view of the clamping element (10) of the invention.
La figura n° 5 ilustra una vista en planta superior del elemento de apriete (10) de la invención.  Figure 5 illustrates a top plan view of the clamping element (10) of the invention.
La figura n° 6 ilustra una vista en perspectiva frontal del elemento de apriete (10) de la invención.  Figure 6 illustrates a front perspective view of the clamping element (10) of the invention.
La figura n° 7 ilustra la misma vista lateral del elemento de apriete (10) de la invención de la figura n° 2 pero de modo explosionada.  Figure 7 illustrates the same side view of the clamping element (10) of the invention of Figure 2 but in an exploded manner.
La figura n° 8 ilustra la misma vista lateral seccionada del elemento de apriete (10) de la invención de la figura n° 3 pero de modo explosionada.  Figure 8 illustrates the same sectional side view of the clamping element (10) of the invention of Figure 3 but in an exploded manner.
La figura n° 9 ilustra la misma vista en perspectiva frontal del elemento de apriete (10) de la invención de la figura n° 6 pero de modo explosionada.  Figure 9 illustrates the same front perspective view of the clamping element (10) of the invention of Figure 6 but in an exploded manner.
La figura n° 10 ilustra una vista lateral de dos elementos de apriete (10) que se empiezan a montar transversalmente en respectivas embocaduras (12) de un conector ( 11 ) .  Figure 10 illustrates a side view of two clamping elements (10) that begin to be mounted transversely in respective openings (12) of a connector (11).
La figura n° 11 ilustra una vista frontal seccionada por C-C de los dos elementos de apriete (10) de la figura n° 10.  Figure 11 illustrates a C-C sectioned front view of the two clamping elements (10) of Figure 10.
La figura n° 12 ilustra una vista en perspectiva frontal de los dos elementos de apriete (10) de la figura n° 10.  Figure 12 illustrates a front perspective view of the two clamping elements (10) of Figure 10.
Las figuras n° 13 a 15 ilustran vistas frontales seccionadas en alzado de las diversas posiciones consecutivas de montaje de un elemento de apriete (10, 10', 10'') en la embocadura (12) de un conector (11). Descripción de una realización preferente de la invención : Figures 13 to 15 illustrate front elevational views of the various consecutive mounting positions of a clamping element (10, 10 ', 10'') in the mouth (12) of a connector (11). Description of a preferred embodiment of the invention:
En la representación de la figura n° 1, se ilustra un elemento de apriete conocido en cuya superficie exterior se monta una junta tórica (38), de modo que al roscar el elemento de apriete en la embocadura (12) de un conector (11) para efectuar un contacto eléctrico con uno o más cables eléctricos (13), dicha junta tórica (38) va efectuando una fuerza de rozamiento contra las paredes interiores (16) de dicha embocadura (12), provocando de ese modo que el contacto eléctrico con dicho cable (13) sea defectuoso.  In the representation of figure 1, a known clamping element is illustrated on whose outer surface an O-ring (38) is mounted, so that when the clamping element is threaded into the mouth (12) of a connector (11) ) to make an electrical contact with one or more electric cables (13), said O-ring (38) is exerting a frictional force against the inner walls (16) of said mouth (12), thereby causing the electrical contact with said cable (13) is defective.
En una de las realizaciones preferidas de la invención, y tal y como puede verse en las figuras adjuntas n° 2 a 9, el elemento de apriete (10) está formado por un conjunto pre-montado constituido por un tornillo de apriete (17) montado en el interior de una tuerca de apriete (19), una junta de estanqueidad (21) montada en la parte inferior de la tuerca de apriete (19) y dos arandelas (22) montada por encima y por debajo de dicha junta de estanqueidad (21) .  In one of the preferred embodiments of the invention, and as can be seen in the attached figures 2 to 9, the clamping element (10) is formed by a pre-assembled assembly consisting of a clamping screw (17) mounted inside a tightening nut (19), a sealing gasket (21) mounted on the bottom of the tightening nut (19) and two washers (22) mounted above and below said sealing gasket (twenty-one) .
El tornillo de apriete (17) presenta una cabeza (18) para el roscado del mismo en el interior de la embocadura por su porción roscada (15) hasta hacer tope por su base inferior (35) contra un cable eléctrico (13), estando provisto entre el cuerpo y cabeza (18) un estrechamiento (39) a modo de superficie de debilitación (véase figuras n° 3 y 8), para que al roscar dicha cabeza (18) hasta el final la misma se rompa por este punto, según se puede ver en la figura n° 14. Por otra parte el tornillo de apriete (17) presenta en la superficie exterior de su cuerpo una parte roscada (25) adaptada para ser roscada en la correspondiente parte roscada (26) de la superficie interior de la tuerca de apriete (19), y asi conseguir la solidarización de la tuerca de apriete (19) en el tornillo de apriete (17). The clamping screw (17) has a head (18) for threading the same inside the mouth by its threaded portion (15) until it stops at its bottom base (35) against an electric cable (13), being provided between the body and head (18) a narrowing (39) as a weakening surface (see figures 3 and 8), so that when threading said head (18) until the end it is broken by this point, as can be seen in figure n ° 14. On the other hand, the clamping screw (17) presents in the outer surface of its body a threaded part (25) adapted to be threaded into the corresponding threaded part (26) of the inner surface of the tightening nut (19), and thus achieve the solidarity of the tightening nut (19) in the tightening screw (17).
Por su parte, la tuerca de apriete (19) presenta una cabeza (20) para el roscado de la misma contra la junta de estanqueidad (21) dispuesta por debajo de la base inferior de la tuerca (19) . La junta de estanqueidad (21) junto con ambas arandelas (22), montadas por encima y por debajo de dicha junta de estanqueidad (21) , presentan un diámetro superior al diámetro de la parte inferior del tornillo de apriete (17), de modo que en la segunda operación de apriete de la cabeza (20) de la tuerca de apriete (19) la arandela inferior (20) queda apoyada por su base inferior (37) en una superficie de tope (36) de la embocadura (12) del conector (11). Por consiguiente, el par de apriete "P2" aplicado sobre la cabeza (20) al hacer tope con dicha superficie de tope (36) deforma la junta de estanqueidad (21) (haciendo disminuir su altura de "el" a "e2") y necesariamente se contrae en dirección axial y consecuentemente genera una fuerza radial xp2" contra las paredes interiores de la embocadura logrando el cierre estanco y contra la superficie exterior del cuerpo del tornillo de apriete (17), véase figura n° 15. For its part, the tightening nut (19) has a head (20) for threading it against the sealing gasket (21) arranged below the lower base of the nut (19). The sealing gasket (21) together with both washers (22), mounted above and below said sealing gasket (21), have a diameter greater than the diameter of the lower part of the clamping screw (17), so that in the second tightening operation of the head (20) of the tightening nut (19) the lower washer (20) is supported by its lower base (37) on a stop surface (36) of the mouth (12) of the connector (11). Therefore, the tightening torque "P2" applied to the head (20) when abutting said abutment surface (36) deforms the seal (21) (decreasing its height from "the" to "e2") and it necessarily contracts in an axial direction and consequently generates a radial force x p2 "against the inner walls of the mouth, achieving the tight seal and against the outer surface of the body of the clamping screw (17), see figure 15.
Se incorpora de modo opcional una puntera (23) fijada inferiormente al tornillo de apriete (17) mediante una porción roscada (27) provista en la parte inferior del tornillo de apriete (17) que rosca en una correspondiente porción roscada interior de la puntera (23), siendo la función de la puntera (23) la de hacer contacto eléctrico con el cable (13), véase figuras n° 2 a 9. La puntera (23) presenta una rosca exterior (29) para el roscado en (15) . Optionally, a toe cap (23) attached inferiorly to the clamping screw (17) is incorporated by means of a threaded portion (27) provided at the bottom of the clamping screw (17) that threads into a corresponding internal threaded portion of the toe ( 23), the function of the toe (23) being that of doing electrical contact with the cable (13), see figures n ° 2 to 9. The toe cap (23) has an external thread (29) for threading in (15).
Se incorpora también de modo opcional en la tuerca de apriete (19) una junta tórica (24), para mejorar la estanqueidad del elemento de apriete (10), véase figuras n° 2 a 9.  An O-ring (24) is also optionally incorporated in the clamping nut (19), to improve the tightness of the clamping element (10), see figures 2 to 9.
Para permitir el paso del cuerpo del tornillo de apriete (17), tanto la tuerca de apriete (19), la junta de estanqueidad (21), las arandelas (22) y la puntera (23) presentan respectivos orificios (30, 31, 32, 33) en dirección axial siendo dichos orificios (30, 31, 32) pasantes excepto el orificio (33) que es ciego, véase figura n° 9.  To allow the passage of the body of the tightening screw (17), both the tightening nut (19), the sealing gasket (21), the washers (22) and the toe (23) have respective holes (30, 31, 32, 33) in the axial direction said holes (30, 31, 32) being through except the hole (33) which is blind, see figure 9.
En las figuras n° 10 a 12 se ilustra una realización posible de un conector (11) con dos embocaduras (12) en las cuales se empiezan a montar respectivos elementos de apriete (10).  A possible embodiment of a connector (11) with two openings (12) on which respective clamping elements (10) begin to be mounted is illustrated in Figures 10 to 12.
La figura n° 13 muestra la posición de introducción del elemento de apriete (10) en el interior de una embocadura (12) de un conector (11) en la primera operación de montaje, la figura n° 14 muestra la posición de roscado máximo del elemento de apriete (10) en el interior de la embocadura (12) del conector (11) al final de la primera operación de montaje en que se aplica una fuerza axial óptima hacia abajo "pl" que provoca la rotura de la cabeza (18) del tornillo de apriete, y por último la figura n° 15 muestra la posición de roscado máximo de la tuerca de apriete (19) sobre la junta de estanqueidad (21) en la segunda operación de montaje que provoca la rotura de la cabeza (20) de la tuerca de apriete (19) y la generación de una fuerza radial óptima "p2" en los dos sentidos que efectúa el cierre totalmente estanco. Figure 13 shows the position of insertion of the clamping element (10) inside a mouth (12) of a connector (11) in the first assembly operation, Figure 14 shows the maximum threading position of the clamping element (10) inside the mouth (12) of the connector (11) at the end of the first assembly operation in which an optimal downward axial force "pl" is applied which causes the head to break ( 18) of the tightening screw, and finally figure 15 shows the maximum threading position of the tightening nut (19) on the sealing gasket (21) in the second assembly operation that causes the head to break (20) of the tightening nut (19) and the generation of a Optimal radial force "p2" in both directions that makes the seal completely tight.
Descrita suficientemente la presente invención en correspondencia con las figuras adjuntas, fácil es comprender que podrán realizarse en las mismas, cualesquiera modificaciones de detalle que se estimen convenientes, siempre y cuando no se altere la esencia de la invención, que queda resumida en las siguientes reivindicaciones .  Described sufficiently the present invention in correspondence with the attached figures, it is easy to understand that any detail modifications deemed convenient may be made therein, as long as the essence of the invention is not altered, which is summarized in the following claims. .

Claims

R E I V I N D I C A C I O N E S: R E I V I N D I C A C I O N E S:
Ia - "Elemento de apriete" de los que se montan en el interior de una embocadura dispuesta transversalmente en un conector dentro del cual se monta como mínimo un cable eléctrico, estando provista la embocadura de una parte interior roscada para el roscado del elemento de apriete, caracterizado en que está formado por un conjunto que comprende: I a - "Clamping element" of those that are mounted inside a mouth located transversely in a connector within which at least one electric cable is mounted, the mouth of a threaded inner part being provided for threading the element of tighten, characterized in that it is formed by a set comprising:
unos medios de apriete que están configurados de modo al actuar sobre los mismos se ejerza un par de apriete que se transmite axialmente y que al hace tope dicho conjunto por su extremo inferior contra el cable eléctrico el par de apriete aplicado "Pl" consigue un óptimo contacto eléctrico con dicho cable eléctrico; y otros medios de apriete que están configurados de modo que, una vez efectuado dicho óptimo contacto eléctrico, al actuar sobre los mismos se ejerza un par de apriete que se transmite radialmente contra las paredes interiores de la embocadura y que dicho par de apriete "P2" sea adecuado para conseguir un óptimo cierre estanco del elemento de apriete en dicha embocadura del conector.  a clamping means that are configured so as to act on them a tightening torque is exerted that is transmitted axially and that at the top of said assembly by its lower end against the electric cable the applied tightening torque "Pl" achieves an optimum electrical contact with said electrical cable; and other means of tightening that are configured so that, once said optimum electrical contact has been made, when acting on them, a tightening torque is exerted that is transmitted radially against the inner walls of the mouth and that said tightening torque "P2 "is suitable for achieving an optimum tight seal of the clamping element in said connector mouth.
2a - "Elemento de apriete" según la primera reivindicación, caracterizado en que la transmisión del par de apriete radial del conjunto se realiza por intermedio de una junta de estanqueidad . 2 a - "Clamping element" according to the first claim, characterized in that the transmission of the radial tightening torque of the assembly is carried out by means of a sealing gasket.
3a - "Elemento de apriete" según la primera y segunda reivindicaciones, caracterizado en que el conjunto comprende: unos medios de apriete formados por un tornillo de apriete provisto de una cabeza adaptado para ser roscado en el interior de la embocadura hasta hacer tope por su extremo inferior contra el cable eléctrico que discurre por el interior del conector y logra ejercer sobre el mismo un par de apriete axial determinado "Pl" para hacer un óptimo contacto eléctrico con dicho cable, y estando provisto dicho tornillo de apriete de unos medios de sujeción de una tuerca de apriete; y 3 a - "Clamping element" according to the first and second claims, characterized in that the assembly comprises: tightening means formed by a tightening screw provided with a head adapted to be threaded inside the mouth until it stops at its lower end against the electric cable that runs through the inside of the connector and manages to exert a pair on it of axial tightening determined "Pl" to make an optimal electrical contact with said cable, and said tightening screw being provided with fastening means of a tightening nut; Y
otros medios de apriete formados por la tuerca de apriete provista de una cabeza adaptada para ser roscada sobre una junta de estanqueidad hasta generar dicha junta de estanqueidad una presión radial "P2" adecuada para hacer un cierre estanco contra las paredes interiores de la parte superior de la embocadura.  other means of tightening formed by the tightening nut provided with a head adapted to be threaded onto a sealing gasket until said sealing gasket generates a radial pressure "P2" suitable to make a tight seal against the inner walls of the upper part of the the mouth
4a - "Elemento de apriete" según cualquiera de las reivindicaciones anteriores, caracterizado en que incorpora en su parte inferior una puntera sujeta al tornillo de apriete y adaptada para hacer contacto eléctrico con el cable eléctrico. 4 a - "Tightening element" according to any one of the preceding claims, characterized in that it incorporates in its lower part a cap attached to the tightening screw and adapted to make electrical contact with the electric cable.
5a - "Elemento de apriete" según la 3 a reivindicación, caracterizado en que los medios de sujeción de la tuerca provistos en el tornillo de apriete son una parte roscada provista en la superficie exterior del tornillo de apriete y la correspondiente parte roscada de la superficie interior de la tuerca. 5 a - "Tightening element" according to claim 3, characterized in that the nut fastening means provided in the tightening screw are a threaded part provided on the outer surface of the tightening screw and the corresponding threaded part of the inner surface of the nut.
6a - "Elemento de apriete" según cualquiera de las reivindicaciones anteriores, caracterizado en que el tornillo de apriete comprende unos medios de debilitación entre su cuerpo y su cabeza, para que al roscar dicha cabeza hasta el final la misma se rompa por dicho medios de debilitación. 7a - "Elemento de apriete" según la cualquiera de las reivindicaciones anteriores, caracterizado en que la tuerca de apriete comprende unos medios de debilitación entre su cuerpo y su cabeza, para que al roscar dicha cabeza hasta el final la misma se rompa por dicho medios de debilitación. 6 a - "Tightening element" according to any of the preceding claims, characterized in that the tightening screw comprises means of weakening between your body and your head, so that when threading said head until the end it is broken by said means of weakening. 7 a - "Tightening element" according to any one of the preceding claims, characterized in that the tightening nut comprises means of weakening between its body and its head, so that when said head is screwed until the end it is broken by said weakening means.
PCT/ES2013/070843 2013-12-04 2013-12-04 Clamping element WO2015082729A1 (en)

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EP13898543.7A EP3079206B1 (en) 2013-12-04 2013-12-04 Clamping element
ES13898543T ES2798188T3 (en) 2013-12-04 2013-12-04 Clamping element

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* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 201163, Derwent World Patents Index; Class Q61, AN 2011-L78801, XP055292384, "LOCKING SCREW FOR O-SHAPED SEALING RING OF CONNECTOR, HAS SELF LOCKING SURFACE WHOSE SELF LOCKING ANGLE IS MORE CRITICAL THAN SELF LOCKING ANGLE OF O-SHAPED LOCKING RING AND LOCKING SCREW" *

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EP3079206A1 (en) 2016-10-12
EP3079206B1 (en) 2020-04-01
ES2798188T3 (en) 2020-12-09
EP3079206A4 (en) 2017-06-07

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