EP3711116B1 - Dispositif de contact adapté pour faciliter la reparation des connexions électriques boulonnées - Google Patents

Dispositif de contact adapté pour faciliter la reparation des connexions électriques boulonnées Download PDF

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Publication number
EP3711116B1
EP3711116B1 EP18811882.2A EP18811882A EP3711116B1 EP 3711116 B1 EP3711116 B1 EP 3711116B1 EP 18811882 A EP18811882 A EP 18811882A EP 3711116 B1 EP3711116 B1 EP 3711116B1
Authority
EP
European Patent Office
Prior art keywords
cut
foam plate
contact device
contact
foam
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
EP18811882.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3711116C0 (fr
EP3711116A1 (fr
Inventor
Michel Pillet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMC SARL
Original Assignee
AMC SARL
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Filing date
Publication date
Application filed by AMC SARL filed Critical AMC SARL
Publication of EP3711116A1 publication Critical patent/EP3711116A1/fr
Application granted granted Critical
Publication of EP3711116C0 publication Critical patent/EP3711116C0/fr
Publication of EP3711116B1 publication Critical patent/EP3711116B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/621—Bolt, set screw or screw clamp
    • 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
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
    • B22F7/004—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
    • B22F7/006—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part the porous part being obtained by foaming
    • 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
    • H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact

Definitions

  • the present invention relates to the technical field of electrical connections and devices which make it possible to improve electrical conductivity through these connections and in particular relates to a contact device adapted to facilitate the repair of bolted electrical connections.
  • the aim of the invention is to provide a contact device for improving bolted electrical connections and lowering their temperature and whose installation does not require complete disassembly of the contact.
  • the object of the invention is therefore a contact device adapted to be inserted between the two contact surfaces of two conductors of an electrical connection provided with at least one bolt, the device consisting of a metal foam plate of high porosity and deformability in order to reduce the electrical resistance of the connection, the surface of the metal foam plate being at least equal to the contact surface of the two conductors.
  • the metal foam plate comprises at least one circular opening intended to contain the bolt and at least a first pre-cut located between the opening and an outer edge of the contact device, the pre-cut being made by cutting the foam plate over part of its thickness so as to weaken it and make it easily breakable along the pre-cut, the pre-cut allowing the passage of the bolt during the installation of the contact device between the two surfaces of contact of the two conductors, the contact device comprising a gripping means located outside of the surface of the foam plate intended to come into contact with the contact surfaces of the two conductors.
  • the device according to the invention is a contact device 10 consisting of a metal foam plate 11 known under the name ECOCONTACT (registered trademark), circular in shape.
  • the metal foam plate 11 comprises an opening 12 and at least one first pre-cut 18.
  • the pre-cut 18 forms a straight segment whose first end is located on the edge of the opening 12 and whose second end is located on the edge lower exterior of the foam plate 11.
  • a gripping means 21 located outside the circular surface and along the outer edge of the foam plate 11 allows the element 10 to be held in the hand.
  • the device according to the invention is a contact device 20 consisting of a metal foam plate 11 of rectangular shape.
  • the metal foam plate 11 comprises a circular opening 12, a first pre-cut 28 and a second pre-cut 29.
  • the two pre-cuts 28 and 29 form two segments whose first ends are located on the edge of the opening 12 and whose second ends are located on the lower outer edge of the foam plate 11.
  • the precuts 28 and 29 are parallel and spaced apart by a width preferably equal to the diameter of the opening 12.
  • a gripping means 21 located outside the rectangular surface and along the upper edge of the foam plate 11 allows the element 20 to be held in the hand.
  • making a pre-cut consists of cutting the foam over part of its thickness so as to weaken it and make it easily breakable along the pre-cut.
  • the pre-cuts are made by laser, by pressing, by punching or by any other means.
  • the part of the foam plate delimited by the two precuts 28 and 29, through part of the edge of the opening 12 and through part of the lower edge of the foam plate forms a piece of detachable foam 23.
  • the contact device 20 is designed to be interposed between two conductors 32 and 34 electrically connected by tight contact thanks to a clamping means such as a clamping bolt 37 passing through the two conductors as well as the foam plate 11 by the opening 12.
  • the shape of the foam plate corresponds to the shape of the contacting surfaces of the two conductors.
  • the gripping means 21 is of any shape provided that it protrudes from the electrical connection when the contact device is inserted between the contact surfaces of the electrical connection. Therefore for all the embodiments described, the gripping means is located outside the surface of the foam plate 11 intended to come into contact with the contact surfaces of the two conductors of the electrical connection.
  • the bolt was loosened in order to separate the conductors by a distance at least equal to the thickness of the foam and the detachable piece 23 of foam was removed from the foam plate 11.
  • the operator holds it by his gripping device 21 and inserts the contact device 20 astride the bolt 37 until the bolt is placed in the location of the opening 12.
  • the operator can also insert the piece 23 in the space left free between the precuts 28 and 29 and tighten the bolt 37.
  • the device according to the invention is a contact device 30 consisting of a metal foam plate 11 of rectangular shape.
  • the metal foam plate 11 has three openings 12 and at least one first pre-cut 18 per opening.
  • Each pre-cut 18 is a straight segment whose first end is located on the edge of one of the openings 12 and whose second end is located on the outer edge of the foam plate 11.
  • a pre-cut 18 is connected to each opening.
  • a gripping element 21 located outside the rectangular surface of the foam plate 11 allows the element 30 to be held in the hand.
  • the foam plate can also include two rounded corners as shown on the Figure 5 .
  • the device according to the invention is a contact device 40 consisting of a metal foam plate 11 of rectangular shape.
  • the metal foam plate 11 has three circular openings 12 and at least one first pre-cut 28 and a second pre-cut 29 per opening 12.
  • the two pre-cuts 28 and 29 are straight segments, a first end of which is located on the edge of the opening 12 and the second end of which is located on the lower edge of the foam plate 11.
  • the precuts 28 and 29 are parallel and spaced apart by a width preferably equal to the diameter of the opening 12.
  • the contact device 40 also includes a gripping element 21.
  • FIG. 7 represents the installation of the device according to the invention in a three-bolt electrical connection according to the embodiment shown on the Figure 5 .
  • the contact device 30 is inserted between the two conductors 32 and 34.
  • the bolts 37, 38 and 39 have been loosened in order to separate the conductors by a distance at least equal to the thickness of the foam and the foam plate has been cut over its entire thickness along each pre-cut 18.
  • the operator spreads and slightly bends the two parts of foam on either side of each old pre-cut 18 so as to separate their edges so that a bolt can pass between them.
  • the operator holds the contact device 30 by its gripping device 21 and inserts it between the two conductive elements 32 and 34, each opening 12 straddling the bolts 37, 38 and 39.
  • the contact device is placed in place when each bolt is placed in an opening 12.
  • the operator then serves the bolts and when the two contact surfaces of the conductors 32 and 34 are brought together, the foam plate 11 is flattened and the edges slightly bent of the part parts and other of each old pre-cut 18 also flatten and cover the entire contact surface of the connection.
  • the contact device 50 consists of a metal foam plate 11 of rectangular shape.
  • the metal foam plate 11 has an opening 12, a first pre-cut 18 and a second pre-cut 19.
  • the pre-cut 18 is a straight segment whose first end is located on the edge of the opening 12 and whose second end is located on the outer and lower edge of the foam plate 11.
  • the pre-cut 19 is located in the extension of the pre-cut 18.
  • the pre-cut 19 is a straight segment whose first end is located on the edge of the opening 12 and whose second end is located on the outer and upper edge of the foam plate 11.
  • An element gripping means 31 located outside the rectangular surface of the foam plate 11 allows the element 50 to be gripped.
  • the gripping means 31 is located on the upper outer edge of the contact device 50 and maintains the foam plate even when it is cut over the entire length of the pre-cuts 18 and 19.
  • the foam plate can also include an additional pre-cut 16 parallel to the edge carrying the gripping means 31 and close to it. This precut 16 is preferably perpendicular to the precut 19.
  • the contact device 50 is inserted between the two conductors 32 and 34.
  • the bolt 37 has been loosened in order to separate the conductors by a distance at least equal to the thickness of the foam.
  • the foam plate 11 has been cut over its entire thickness along the pre-cuts 18 and 19 and comprises two parts of foam 111 and 112 held together by the gripping means 31.
  • the gripping means 31 is also a means of articulating the two parts of foam 111 and 112 between them and to move them apart from each other to insert them between the conductors and astride the bolt 37.
  • This embodiment is particularly suitable and advantageous when the spacing between the two surfaces of the electrical connection cannot be made greater than the thickness of the foam without risk of loss of nut.
  • the gripping means has the role of a joint and is made of an elastic and preferably electrically non-conductive material such as rubber. If necessary, the foam plate can also be cut along its additional pre-cut 16 so as to further facilitate the insertion of the foam plate between the two contact surfaces of the two conductors.
  • the gripping means 21 and 31 protrude from the electrical connection when the contact device is inserted between the contact surfaces of the electrical connection.
  • the gripping means 21 and 31 are a means for visually identifying the electrical connections equipped with metal foam.
  • the gripping means 21 and 31 can be used as a referencing means by entering a batch number, a date or a reference to other data.
  • the gripping means 21, 31 can also be equipped with a temperature indicator so as to provide an indication of the temperature reached in the electrical connection and in particular when the maximum temperature supported is reached in the electrical connection.
  • the temperature indicator may be a strip that changes color depending on the temperature.
  • the metal foam of contact devices 10, 20, 30, 40 and 50 is an open cell foam composed of a metal foam skeleton selected from the group consisting of iron, cobalt, nickel and their alloys covered directly with least a metallic coating such as a coating of tin, indium or one of their alloys.
  • the foam is obtained according to the production processes described in the application WO2012007701 .
  • the structure of the foam 10 thus obtained is alveolar and its physical properties are mainly high porosity and deformability, which has the effect of reducing the electrical resistance of the connection, as well as a low density of around 400 g/m 2 .
  • the thickness of the metal foam plates of the devices according to the invention is of the order of 1 to 2 mm.
  • One of the advantages of the device according to the invention is to permanently lower the temperature of the electrical connections. The result is improved electrical efficiency, less rapid degradation of electrical circuits and increased safety.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Multi-Conductor Connections (AREA)
EP18811882.2A 2017-11-13 2018-11-13 Dispositif de contact adapté pour faciliter la reparation des connexions électriques boulonnées Active EP3711116B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1771210A FR3073677B1 (fr) 2017-11-13 2017-11-13 Dispositif de contact adapte pour faciliter la reparation des connexions electriques boulonnees
PCT/FR2018/000249 WO2019092330A1 (fr) 2017-11-13 2018-11-13 Dispositif de contact adapte pour faciliter la reparation des connexions electriques boulonnees

Publications (3)

Publication Number Publication Date
EP3711116A1 EP3711116A1 (fr) 2020-09-23
EP3711116C0 EP3711116C0 (fr) 2023-12-20
EP3711116B1 true EP3711116B1 (fr) 2023-12-20

Family

ID=61873506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18811882.2A Active EP3711116B1 (fr) 2017-11-13 2018-11-13 Dispositif de contact adapté pour faciliter la reparation des connexions électriques boulonnées

Country Status (9)

Country Link
US (1) US11075485B2 (ko)
EP (1) EP3711116B1 (ko)
JP (1) JP7330991B2 (ko)
KR (1) KR20200085288A (ko)
CN (1) CN111448714B (ko)
AU (1) AU2018363235B2 (ko)
CA (1) CA3081396A1 (ko)
FR (1) FR3073677B1 (ko)
WO (1) WO2019092330A1 (ko)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136211A3 (fr) * 1983-08-04 1985-07-24 Jean-Paul Begouen Rondelles antifriction pour charnières d'ouvrants et dispositif de pose de celles-ci
JPS62104371U (ko) * 1985-12-23 1987-07-03
ATE141717T1 (de) * 1992-05-08 1996-09-15 Multi Contact Ag Kontaktvorrichtung
JP2910663B2 (ja) * 1996-03-22 1999-06-23 日本電気株式会社 先端丸形圧着端子
JP3892672B2 (ja) * 2001-01-26 2007-03-14 株式会社オートネットワーク技術研究所 ワイヤーハーネス用アース端子構造
JP3875547B2 (ja) * 2001-12-11 2007-01-31 株式会社オートネットワーク技術研究所 アース端子
FR2847391A1 (fr) 2002-11-20 2004-05-21 A M C Dispositif de contact pour ameliorer la duree de vie des connexions electriques
JP4537321B2 (ja) * 2006-01-10 2010-09-01 矢崎総業株式会社 ボルト締め用端子
US7547228B1 (en) * 2008-07-10 2009-06-16 Honeywell International Inc. Joining means for device components
FR2962856B1 (fr) * 2010-07-16 2012-08-17 Amc Holding Dispositif de connexion electrique a conductance amelioree
FR2996348B1 (fr) 2012-10-03 2015-05-15 Amc Holding Poudre et pate pour ameliorer la conductance des connexions electriques
FR2997788B1 (fr) 2012-11-05 2016-01-22 Amc Etec Dispositif de sectionnement d'une ligne d'alimentation electrique a courant de haute intensite
CN204130709U (zh) * 2014-08-27 2015-01-28 成都福凌云科技有限公司 用于改善电路连接的导电装置

Also Published As

Publication number Publication date
FR3073677A1 (fr) 2019-05-17
JP2021502686A (ja) 2021-01-28
CN111448714A (zh) 2020-07-24
AU2018363235B2 (en) 2024-01-18
AU2018363235A1 (en) 2020-05-21
FR3073677B1 (fr) 2019-10-11
JP7330991B2 (ja) 2023-08-22
WO2019092330A1 (fr) 2019-05-16
US20200350727A1 (en) 2020-11-05
EP3711116C0 (fr) 2023-12-20
EP3711116A1 (fr) 2020-09-23
US11075485B2 (en) 2021-07-27
CN111448714B (zh) 2022-07-29
CA3081396A1 (fr) 2019-05-16
KR20200085288A (ko) 2020-07-14

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