EP3079206B1 - Élément de serrage - Google Patents

Élément de serrage Download PDF

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Publication number
EP3079206B1
EP3079206B1 EP13898543.7A EP13898543A EP3079206B1 EP 3079206 B1 EP3079206 B1 EP 3079206B1 EP 13898543 A EP13898543 A EP 13898543A EP 3079206 B1 EP3079206 B1 EP 3079206B1
Authority
EP
European Patent Office
Prior art keywords
tightening
head
screw
connector
nut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13898543.7A
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German (de)
English (en)
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EP3079206A1 (fr
EP3079206A4 (fr
Inventor
Joaquim RIERA CAPELLES
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Niled SAE
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Niled SAE
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Publication of EP3079206A4 publication Critical patent/EP3079206A4/fr
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Publication of EP3079206B1 publication Critical patent/EP3079206B1/fr
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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 refers to a pre-mounted tightening elements of the kind that are placed inside an opening or hole placed crosswise in a connector, said connector consisting of a connecting element especially designed for tightening element one or more electrical wires that are entered lengthwise into it by way of one or more tightening elements.
  • Connectors that allow splices, shunts, or terminations, preferably of metal, with a body that is tubular, generally cylindrical, are well-known. Usually they have one or more holes or bores that cross through the wall of said body in order to hold one or more electrical wires of the same or different diameters running lengthwise inside the connector still in the interior of the connector by way of their respective tightening elements.
  • the tightening elements are intended to maintain a certain torque on the exterior part of the electrical wire in order to make an electrical connection with said wire.
  • the tightening elements are designed so that when the foreseen torque is surpassed, they end up breaking, as there is a choking area, which is preferably ring-shaped, inside them that determines the torque force to be applied to the wire in the interior of the connector, where part of the element breaks.
  • tightening elements configured with the additional function of ensuring a degree of waterproofing that is suitable for keeping fluids, such as water, from getting into the connector.
  • This double function of the Tightening elements currently presents technical difficulties, as known tightening elements are made up of a waterproof tightening screw held into the element like an 0-ring, so that when the tightening screw is screwed into the transverse opening of a connector to make an electrical contact with the electrical wire, the waterproofing rubs against the inner walls of the transverse opening and this rubbing force means that when one tries to maximise the waterproofing, the axial pressure on the electrical wiring decreases, so that the electrical contact with said wire is made under conditions of less-than-normal torque transmission.
  • EP 1 918 595 A1 discloses a controlled shear bolt assembly (1), comprising: a bolt body (10) having, at a free end, a threaded portion from which protrudes a central shank; a head (30) designed to be able to cooperate with a rotary drive tool so that rotary motion is transmitted to the bolt body shank and, consequently, to the threaded portion; and a ring (20) designed to be disposed on the central shank and suitable for ensuring continuity of the male thread with the threaded portion once disposed on the shank; wherein the bolt body presents a single controlled shear zone ensuring the junction of the shank and the threaded portion, with rotation locking means being provided on each ring and the threaded portion to ensure rotation locking of each ring in relation to the threaded portion of the bolt body.
  • EP 2 375 502 A1 refers to a clamping device with divisible head for an electric connection sleeve.
  • the device (4) has a socket (3) opened at two ends and provided with an external thread and an internal thread, and a screw (2) including a body with a partially threaded lower portion to connect with the internal thread of the socket.
  • the screw body comprises a divisible ring (28) defining an external shoulder and a divisible area (26) separating a body of a screw head.
  • the shoulder is connected with the socket to allow screwing of the socket by an action on the screw head.
  • US 4 734 061 A deals with a telecommunications terminal block, that provides service wire terminations within cells that are electrically and physically isolated from other cells in the block, and from the environment, thereby effectively preventing corrosion and shorting by eliminating electrical bridging between tip and ring service wire circuits.
  • EP 1833 117 A2 discloses a screw for electric connectors, the screw being fit to be threadingly engaged into a radial bore of the connector in order to thus clamp and fasten the cable being arranged in the connector, between the head and the threaded portion said screw having an intermediary portion and being thereat provided with an annular necked-down portion and stop next to the head and with an annular necked-down portion next to the threaded portion, said necked-down portions being designed for a clamping torque being predetermined in correspondence with the diameter of the lead for the breakage of the screw in the bore of the connector.
  • the screw has another annular stop next to the necked-down portion being adjacent to the threaded portion, and the screw being provided with two necked-down portion and annular stop pairs incorporates in combination with it an internally and externally threaded bushing, the bushing being thus in a position to have its external thread screwed into the bore of the connector, and the screw being thus in a position to be screwed into the inside of the bushing.
  • the main aim of the present invention is to design a tightening element adapted to be mounted inside a opening or hole placed transverse in a connector, within which one or more electrical wires are placed, which on one hand makes optimal electrical contact between the tightening element and the electrical wire, and on the other hand, allows optimal waterproof tightening of the tightening element in the connector.
  • Another aim of the present invention is to design a tightening elements element that can easily be mass produced with low manufacturing costs, so that later the system can be pre-mounted in a connector.
  • Another aim of the present invention is to design a pre-mounted tightening element that can easily be assembled by a factory worker inside the transverse opening of a connector.
  • the present invention consists of a pre-mounted tightening element of the kind placed inside of an opening placed transverse in a connector, as described in claim 1, inside of which one or more electrical wire(s) are placed, this opening having a threaded part at the bottom for the threading to hold the tightening elements still.
  • the pre-mounted tightening element of the invention is made up of an assembly that comprises: A means of tightening that is assembly up in such a way that when you act on it, it exercises a torque that is transmitted axially, and when this assembly comes up against the electrical wiring at its lower end, the torque applied, "PI,” achieves an optimal electrical contact with said electrical wire; and
  • This particular configuration of the tightening element means that once it is pre-mounted, it can be placed in the opening of a connector by way of two simple, consecutive actions, so that two different functions are fulfilled at the same time: on one hand there is an optimal electrical contact with the electrical wire, and on the other hand, there is optimal waterproof closing of the tightening elements in the opening.
  • the transmission of the radial torque of the assembly is made by way of a waterproof joint.
  • the pre-mounted tightening assembly comprises:
  • the axial pressure, "p1" of the tightening screw against the electrical wire is achieved by applying a "P1" torque on the head of the tightening screw in a first screwing operation.
  • the "p2" radial pressure of the waterproofing joint against the inner walls of the opening is achieved by applying a "P2" torque on the head of the tightening nut in a second screwing operation that is transmitted to the waterproofing joint, the lower part of which rests on the connector, so that said torque contracts the waterproof joint axially and thus generates a radial force "P2" against the inner walls of the opening, making a waterproof seal.
  • the means of holding the tightening nut on the tightening screw can be a threaded part foreseen on the exterior surface of the tightening screw and the corresponding coaxial threaded part of the interior surface of the nut.
  • Both the tightening screw and the tightening nut include a means of weakening between their respective bodies and heads, so that when the aforementioned heads are screwed all the way in, they break by way of said weakening mechanism.
  • the pre-mounted assembly can include two tightening washers placed above and below the waterproofing joint, made to press on the joint above and below said joint, respectively.
  • the lower part of the pre-mounted assembly may optionally include an end piece attached to the tightening screw and adapted to make an electrical contact with the wire, this piece being adapted to the material and/or type of each conductor so as to make an optimal electrical contact of metal against metal, due to the great variety of materials (for example, aluminium or copper) and types of wires (solid, flexible, etc.).
  • the pre-mounted assembly may optionally include an 0-ring in the tightening nut, in order to improve the waterproofing of the tightening assembly.
  • Figure no. 1 shows a known tightening element with an 0-ring (38) mounted on the outer surface, so that when the tightening element is screwed into the opening (12) of a connector (11) to make an electrical contact with one or more electrical wires (13), this 0-ring (38) rubs against the inner walls (16) of said opening (12), thus making the electrical contact with said wire (13) faulty.
  • the tightening element (10) is made up of a pre-mounted assembly comprising a tightening screw (17) mounted inside a tightening nut (19), a waterproofing joint (21) mounted in the lower part of the tightening nut (19), and two washers (22) mounted above and below the aforementioned waterproofing joint (21).
  • the tightening screw (17) has a head (18) for the screwing of the same inside the opening by the threaded part (15) until its lower base (35) butts up against an electrical wire(13), having a narrowing (39) between the body and the head (18) as a weakening surface (see figures no. 3 and 8), so that when this head (18) is screwed all the way in, it breaks at this point, as can be seen in figure no. 14.
  • the tightening screw (17) has a screwing part (25) on the outer surface of its body intended to be screwed into the corresponding threaded part (26) of the inside surface of the tightening nut (19), thus joining the tightening nut (19) to the tightening screw (17).
  • the tightening nut (19) has a head (20) to screw it against the waterproofing joint (21) placed under the lower base of the nut (19).
  • the torque "P2" applied to the head (20) deforms the waterproofing joint (21) (making its height decrease from “e1” to “e2”) when it butts against said surface (36), and it necessarily contracts axially and consequently generates a radial force "p2" against the inner walls of the opening, thus achieving a waterproof seal against the outside surface of the body of the tightening screw (17), see figure no. 15.
  • end piece (23) can optionally have a end piece (23) attached below to the tightening screw (17) by way of a threaded portion (27) on the lower part of the tightening screw (17) that screws into a corresponding interior threaded portion of the end piece (23), the end piece (23) having the function of making an electrical contact with the wire (13), see figures no. 2 to 9.
  • the end piece (23) has outside threading (29) for screwing in (15).
  • the tightening nut (19), the waterproofing joint (21), the washers (22) and the end piece (23) have their respective through-holes (30, 31, 32, 33) in an axial direction, (30, 31, 32), except hole (33), which is blind, see figure no. 9.
  • Figures no. 10 to 12 show a possible version of a connector (11) with two openings (12) in which the respective tightening elements (10) are starting to be mounted.
  • Figure no. 13 shows the position of the introduction of the tightening element (10) into a opening (12) of a connector (11) in the first assembly operation
  • figure no. 14 shows the maximum screwing-in position of the tightening element (10) inside the opening (12) of the connector (11) at the end of the first assembly operation in which an optimal axial force is applied downwards, "p1” causing the breaking of the head (18) of the tightening screw
  • figure no. 15 shows the maximum screwing-in position of the tightening nut (19) on the waterproofing joint (21) in the second assembly operation, causing the breaking of the head (20) of the tightening nut (19) and the generation of an optimal radial force, "p2" in the two directions that makes the closure totally waterproof.

Landscapes

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

Claims (5)

  1. Élément de serrage (10, 10' 10") destiné à tenir un ou plusieurs câbles électriques (13) afin de réaliser une connexion électrique avec lesdits câbles (13), l'élément de serrage étant monté à l'intérieur d'une ouverture transversale (12) placée dans un connecteur (11), le connecteur (11) présentant également une ouverture longitudinale à l'intérieur de laquelle un câble électrique (13) au moins est disposé dans le sens de la longueur, l'ouverture transversale (12) présente une partie intérieure filetée (16) destinée à être vissée dans l'élément de serrage (10, 10' 10"), l'élément de serrage (10, 10' 10") se compose d'un ensemble préalablement monté comprenant :
    - une vis de serrage (17) présentant une tête (18) destinée à visser la vis de serrage (17) et un corps, et comprenant une zone d'affaiblissement entre son corps et sa tête (18), et le corps de ladite vis de serrage (17) comprenant une partie filetée (25) destinée à tenir à l'extérieur un écrou de serrage (19), la tête (18) est brisée dans la zone d'affaiblissement quand elle est vissée au cours d'une première opération de vissage à l'intérieur de l'ouverture transversale (12), jusqu'à ce que l'extrémité inférieure vienne en butée contre le câble électrique ;
    caractérisé en ce que :
    - l'écrou de serrage (19) présentant une tête (20) destinée à visser l'écrou de serrage (19), et comprenant une zone d'affaiblissement (40) entre son corps et sa tête (20), la tête (20) est brisée dans la zone d'affaiblissement quand elle est vissée au cours d'une seconde opération de vissage sur un joint d'étanchéité (21) jusqu'à ce que la partie inférieure du joint (21) vienne en butée contre une paroi intérieure de l'ouverture transversale (12), et l'écrou de serrage (19) présentant une partie filetée (26) disposée sur sa surface intérieure ; et
    - le joint d'étanchéité (21) étant destiné, une fois déformé, à réaliser un joint d'étanchéité contre les parois intérieures de l'ouverture (12), le joint d'étanchéité (21) est monté dans la partie inférieure de l'écrou de serrage (19), et est contracté axialement quand un couple est appliqué à la tête (20) de l'écrou de serrage (19).
  2. Élément de serrage selon la revendication 1, caractérisé en ce qu'il présente une partie extrémité (23) dans la partie inférieure, fixée sous la vis de serrage (17), et établissant un contact électrique avec le câble électrique.
  3. Élément de serrage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend deux rondelles de serrage (22) placés au-dessus et au-dessous du joint d'étanchéité (21).
  4. Élément de serrage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un joint torique (24) dans l'écrou de serrage (19).
  5. Élément de serrage selon la revendication 3, caractérisé en ce que le joint d'étanchéité (21) et les deux rondelles de serrage (22) présentent un diamètre supérieur plus grand que le diamètre de la partie inférieure de la vis de serrage (17).
EP13898543.7A 2013-12-04 2013-12-04 Élément de serrage Active EP3079206B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2013/070843 WO2015082729A1 (fr) 2013-12-04 2013-12-04 Élément de serrage

Publications (3)

Publication Number Publication Date
EP3079206A1 EP3079206A1 (fr) 2016-10-12
EP3079206A4 EP3079206A4 (fr) 2017-06-07
EP3079206B1 true EP3079206B1 (fr) 2020-04-01

Family

ID=53272933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13898543.7A Active EP3079206B1 (fr) 2013-12-04 2013-12-04 Élément de serrage

Country Status (3)

Country Link
EP (1) EP3079206B1 (fr)
ES (1) ES2798188T3 (fr)
WO (1) WO2015082729A1 (fr)

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US4734061A (en) * 1986-12-31 1988-03-29 Bell Communications Research, Inc. Telecommunications terminal block
EP1099892A1 (fr) * 1999-11-09 2001-05-16 Witzenmann GmbH Metallschlauch-Fabrik Pforzheim Dispositvf d'etanchéite entre deux éléments de sections axis-symétriques, co axiales entre - elles
ES2300169B1 (es) 2005-11-17 2009-03-01 Ridelin, S.L. Sistema de aislamiento para los extremos de cables electricos.
CA2532289C (fr) * 2006-01-06 2009-10-27 Thomas & Betts International, Inc. Ensemble de connexion etanche isole comprenant une cle de commande de vis de calage
ES2283219B1 (es) 2006-04-12 2008-09-16 Ridelin S.L. Tornillo para conectores electricos.
BRPI0703433B1 (pt) * 2006-03-08 2018-05-08 Ridelin Sl parafusos para conectores elétricos
ES2281291B1 (es) 2006-03-08 2008-06-01 Ridelin S.L. Tornillo perfeccionado para conectores electricos.
GB2443001A (en) * 2006-10-21 2008-04-23 Tyco Electronics Ltd Uk Bolt having extending contact tip
ES2318998B1 (es) 2006-10-24 2009-12-17 Ridelin S.L. Conector mecanico con centrador de cable incorporado.
FR2907859B1 (fr) * 2006-10-30 2008-12-19 Tyco Electronics Simel Soc Par Ensemble a vis a rupture programmee
AU2009200994B2 (en) * 2008-04-29 2014-11-06 Tyco Electronics Energy Pty Ltd Installation Monitoring for Connectors
FR2958459B1 (fr) * 2010-04-06 2012-10-12 Soreca Dispositif de serrage a tete secable pour manchon de raccord electrique
EP2381535B1 (fr) * 2010-04-26 2015-03-04 Nexans Dispositif de fixation d'un conducteur électrique dans une pince
CN102163777A (zh) * 2010-11-22 2011-08-24 苏州华旃航天电器有限公司 一种连接器o型密封圈锁紧螺钉
EP2498338B1 (fr) * 2011-03-11 2013-12-18 Nexans Ensemble avec une borne constitué d'un elément tubulaire à métal et au moins une vis de serrage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2798188T3 (es) 2020-12-09
EP3079206A1 (fr) 2016-10-12
EP3079206A4 (fr) 2017-06-07
WO2015082729A1 (fr) 2015-06-11

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