EP2725660A1 - Elastisches Gehäuse für Anschlussklemme - Google Patents

Elastisches Gehäuse für Anschlussklemme Download PDF

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Publication number
EP2725660A1
EP2725660A1 EP13174844.4A EP13174844A EP2725660A1 EP 2725660 A1 EP2725660 A1 EP 2725660A1 EP 13174844 A EP13174844 A EP 13174844A EP 2725660 A1 EP2725660 A1 EP 2725660A1
Authority
EP
European Patent Office
Prior art keywords
cage
elastic
branch
deformation
screw
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.)
Granted
Application number
EP13174844.4A
Other languages
English (en)
French (fr)
Other versions
EP2725660B1 (de
Inventor
Daniel Vanzetto
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Priority to PL13174844T priority Critical patent/PL2725660T3/pl
Publication of EP2725660A1 publication Critical patent/EP2725660A1/de
Application granted granted Critical
Publication of EP2725660B1 publication Critical patent/EP2725660B1/de
Active legal-status Critical Current
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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—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
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks

Definitions

  • the invention relates to an elastic cage for connection terminal, said cage being made by cutting and folding a metal strip to form an elastic frame delimiting an opening of quadrangular section for the insertion of a cable to be connected. Said opening is delimited by a first and second lateral branches developing parallel to one another from a bottom. The first branch is extended by an upper branch closing the one-piece structure of the cage being separated from the second branch by at least a first axial play extending in the direction of movement of the screw.
  • the invention also relates to a connection terminal comprising an elastic cage.
  • the cage terminals of the kind mentioned generate significant pressure forces when tightening the cable to be connected. These forces in the terminal can reach 600 daN, while values ten times smaller would be sufficient to ensure a suitable electrical contact pressure for the passage of the current.
  • a high initial force value has the advantage of causing the shaping of the conductors of the cable, but this effort can decrease as the creep and the deformation of the metal of the conductors over time. This results in a loosening effect of the terminals, resulting in risk of overheating at the contact area.
  • the document EP 336251 discloses a screw terminal having a clamping frame and a fixing bracket arranged perpendicularly, and allowing a double connection of a contact pad and a wire or cable. An interval is provided between the ends of the open frame.
  • connection terminal adapted to undergo a controlled deformation during the clamping of a cable with a connection range of a cut-off device.
  • This elastic deformation having the advantage of providing some clamping compensation in case of creep of the cable.
  • this deformation of the clamping terminal causes some axial misalignment of the clamping screw. It follows from this drawback that the tightening becomes less effective.
  • the object of the invention is to provide an elastic cage connection terminal permanently ensuring a good electrical contact with the cable without using additional spring inside the cage.
  • the upper branch intended to be traversed perpendicularly by the clamping screw forms a first angle of deformation with a longitudinal axis of the parallel cage at the first and second lateral branches.
  • the bottom forms a second angle of deformation with the longitudinal axis of the cage.
  • the first angle of deformation is greater than 90 ° and the second angle is preferably less than 90 °.
  • the two deformation angles are substantially equal to 90 °.
  • the second lateral branch has an end projecting from the upper branch supporting the screw, and comprises a rectangular orifice in which engages an extension of said upper branch.
  • the terminal extension is supported on the lower edge of the rectangular orifice being separated from the upper edge by the first axial clearance when the terminal is in the loosened state.
  • the second transverse clearance is provided between the inner face of the second lateral branch and the base of the extension.
  • the terminal extension of the upper branch takes the form of tenon having an end developing substantially parallel to the second lateral branch.
  • the end of the leg comprises a deformation extending closer to the clamping screw, said deformation to prevent slippage of the end on an outer radius of the extension at the end of tightening.
  • connection terminal comprises a clamping screw housed in a threaded hole formed in the upper branch of the elastic cage, said screw has a longitudinal axis perpendicular to said branch and is intended to clamp a cable between a clamping shoe integral with said screw and a connection pad.
  • the clamping shoe secured to one end of the clamping screw is secured to a movable screen, a movable member formed by said pad and said screen tending to approach the bottom of the cage at the time of the tightening phase.
  • the mobile screen is positioned parallel to one of the two access faces of the cage and is able to partially obscure the opening of the cage.
  • a connection terminal comprises a cage 12, a clamping screw 14.
  • the connection terminal is intended to make the electrical connection between a connection pad 46, in particular of a switchgear and an electric cable 36.
  • the cage 12 has a one-piece structure made by cutting and folding a conductive metal strip, so as to form a frame of substantially quadrangular section.
  • the inside of the cage 12 has an opening 18 opening on two access faces to said cage.
  • the opening is delimited by a bottom 20.
  • From the bottom 20 are developed two lateral branches 22, 24 extending parallel to one another.
  • the two branches develop substantially parallel to a longitudinal axis Y of the cage 12.
  • a first branch 24 is extended by an upper branch 26 traversed by the clamping screw 14.
  • the clamping screw 14 is developed perpendicularly to the upper branch 26.
  • the clamping screw 14 has a longitudinal axis Z.
  • a branch 26 positioned opposite the bottom 20 tends to close the monobloc structure of the cage12.
  • the second lateral branch 22 is provided at the top with an orifice 28 in which an end extension 30 of the upper branch 26 engages.
  • the orifice is preferably rectangular.
  • the terminal extension of the upper branch 26 takes the form of tenon According to a particular embodiment, said tenon has the particularity of having an end 37 developing substantially parallel to the lateral branch 22.
  • the screw 14 is housed in a tapped hole 32 formed in a collar 34 of the upper branch 26.
  • the clamping screw 14 has a first end placed outside the cage and having a cavity 17 designed to collaborate with a tool. Tightening.
  • the clamping screw 14 has a second end placed inside the cage 12.
  • a clamping pad 16 is fixed on the second end of the clamping screw 14.
  • the connection pad 46 is positioned against the bottom 20 of the elastic cage 12.
  • the metal clamping shoe 16 is housed in the opening 18 of the cage 12 extending parallel to the branch 26, and is intended to clamp the cable 36 against the connection pad 46 when the screw 14 is tightened.
  • clamping shoe 16 is made of copper or preferably of steel.
  • the clamping shoe 16 secured to the end of the threaded rod of the screw 14 moves in translation in the opening 18 during the rotation of the 14.
  • the clamping pad 16 approaches the fixed connection area 46 and the bottom 20 causing the tightening of the cable 36 against the latter.
  • the cage 12 has two extreme operating positions.
  • the cage 12 is in a first operating position, first said loosened position.
  • This first loosened position is defined when the clamping screw 14 applies no tightening torque on an electric wire 36.
  • the cage 12 is in a second operating position, second so-called tight position.
  • This second tight position is defined when the clamping screw 14 applies a tightening torque nominal on the electrical wire 36.
  • the electric cage 12 has the particular feature of being deformed elastically between these two operating positions.
  • the longitudinal axis Z of the clamping screw 14 is not aligned with the longitudinal axis Y of the cage 12 defined by the first and second lateral branches 22, 24 parallel.
  • the upper branch 26 is not perpendicular to the first and second lateral branches 22, 24.
  • the upper branch 26 forms a first angle of deformation ⁇ 1 with the longitudinal axis of the cage 12.
  • the bottom 20 forms a second angle of deformation ⁇ 2 with the longitudinal axis of the cage 12.
  • the first deformation angle ⁇ 1 is preferably greater than 90 ° and the second angle ⁇ 2 is preferably less than 90 °.
  • the longitudinal axis Z of the clamping screw 14 is aligned with the longitudinal axis Y of the cage 12 defined by the first and second lateral branches 22, 24 parallel.
  • the upper branch 26 is perpendicular to the lateral branches 22, 24.
  • the first deformation angle ⁇ 1 is then equal to 90 °.
  • the bottom 20 is also perpendicular to the first and second lateral branches 22, 24.
  • the second angle of deformation ⁇ 2 is also equal to 90 °.
  • the end of the second lateral branch 22 has an end 23 projecting from the upper branch 26.
  • the terminal extension of the upper branch 26 bears on the lower edge of the rectangular orifice 28 being separated from the upper edge by a first axial clearance J1 when the terminal 10 is in the loosened state ( figure 1 ).
  • a second transverse clearance J2 is provided between the inner face of the second branch 22 and the base of the extension 30, so as to allow the elastic deformation of the cage 12 during the tightening of the screw 14.
  • the end 23 of the second branch 22 comprises a deformation 27 extending as close as possible to the clamping screw 14. This deformation 27 makes it possible to prevent the end 23 from sliding on the outer radius of the extension 30 end tightening when the clamping forces applied to the cage 12 are very important.
  • the actuation of the screw 14 causes at the start of clamping an elastic deformation of the cage 12 following the lifting of the end extension indicated by the arrow F1.
  • This lifting movement is possible thanks to the presence of the games J1 and J2, and stops as soon as the terminal extension abuts against the upper edge of the rectangular orifice 28.
  • the axial clamping force in the cage 12 is relatively moderate during the elastic deformation, and is located in the vicinity of a first clamping threshold in the range of 10 to 60 daN.
  • the first tightening threshold S1 is reached when the relative displacement of the screw 14 with respect to the tapping of the hole 32 corresponds to the dimension of the first set J1.
  • the first set J1 is preferably of the order of 1.6 mm. This first tightening threshold S1 is entirely adapted to the passage of current between the connection pad 46 and the cable 36.
  • the deformation of the cage 12 during this second clamping phase is less than the elastic deformation generated during the catching of the first set J1. According to this embodiment, the deformation is very small or nonexistent.
  • the cage is deformed so that the longitudinal axis Z of the clamping screw 14 merges with the longitudinal axis Y of the cage 12.
  • An axial deformation angle ⁇ between the two longitudinal axes Y and Z tends to disappear.
  • Connecting points between the bottom 20 and the first and second lateral branches 22, 24 deform of so that the bottom 20 is finally perpendicular to the two branches.
  • the conductive connection pad 46 sandwiched between the bottom 20 and the electric cable 36 is then positioned on a plane support. This support ensures a good heat exchange between the cable 36 and the connection pad 46 positioned against the bottom 20 of the cage 12. This support thus reduces the heating due to the passage of the current.
  • the cage 12 also undergoes deformation at the points of connection between the upper branch 26 and the two lateral branches 22, 24. Said upper branch 26 is finally perpendicular to the two branches.
  • the cage thus has a substantially rectangular profile.
  • the first axial clearance J1 adapted to the elastic deformation of the cages 12 extends in the direction of movement of the screw 14.
  • the clamping shoe 16 associated with the clamping screw 14 is secured to a movable screen 47.
  • a movable assembly formed by said pad and said screen tends to approach the bottom 20 at the time of the clamping phase.
  • the mobile screen 47 positioned parallel to one of the two access faces of the cage 12 is thus able to partially obscure the opening 18 of the cage 12. In other words, the access to the cable 36 is thus minimized by the presence of the mobile screen 47 in front of an access face of the cage 12.

Landscapes

  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Cable Accessories (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Clamps And Clips (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP13174844.4A 2012-10-23 2013-07-03 Elastisches Gehäuse für Anschlussklemme Active EP2725660B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13174844T PL2725660T3 (pl) 2012-10-23 2013-07-03 Osłona sprężysta do zacisku przyłączeniowego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1260074A FR2997237B1 (fr) 2012-10-23 2012-10-23 Cage elastique pour borne de raccordement et borne comportant une telle cage

Publications (2)

Publication Number Publication Date
EP2725660A1 true EP2725660A1 (de) 2014-04-30
EP2725660B1 EP2725660B1 (de) 2017-08-16

Family

ID=47429921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13174844.4A Active EP2725660B1 (de) 2012-10-23 2013-07-03 Elastisches Gehäuse für Anschlussklemme

Country Status (14)

Country Link
US (1) US9153881B2 (de)
EP (1) EP2725660B1 (de)
CN (1) CN103779676B (de)
AR (1) AR093104A1 (de)
BR (1) BR102013027276B1 (de)
ES (1) ES2646588T3 (de)
FR (1) FR2997237B1 (de)
MA (1) MA35087B1 (de)
MX (1) MX368282B (de)
PE (1) PE20141714A1 (de)
PL (1) PL2725660T3 (de)
RU (1) RU2619072C2 (de)
TW (1) TWI590546B (de)
UA (1) UA118329C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3624270A1 (de) * 2018-09-13 2020-03-18 Schneider Electric Industries SAS Anschlussklemme eines elektrischen leiters an der klemmenleiste eines elektrischen geräts, und elektrisches schutzgerät, das eine solche klemme umfasst

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2541685B1 (de) * 2011-06-30 2013-12-25 Siemens Aktiengesellschaft Schirmanschlussklemme
US11493998B2 (en) 2012-01-17 2022-11-08 Ultrahaptics IP Two Limited Systems and methods for machine control
US9696867B2 (en) 2013-01-15 2017-07-04 Leap Motion, Inc. Dynamic user interactions for display control and identifying dominant gestures
US10620709B2 (en) 2013-04-05 2020-04-14 Ultrahaptics IP Two Limited Customized gesture interpretation
US9747696B2 (en) 2013-05-17 2017-08-29 Leap Motion, Inc. Systems and methods for providing normalized parameters of motions of objects in three-dimensional space
DE102014221347A1 (de) * 2014-10-21 2016-04-21 Te Connectivity Germany Gmbh Anordnung zur Verbindung zweier elektrischer Leiter
CN104347962B (zh) * 2014-11-08 2016-08-24 钟明华 坐柱式多向电线集揽器
USD796455S1 (en) * 2016-06-15 2017-09-05 Eaton Corporation Electrical terminal
US11875012B2 (en) 2018-05-25 2024-01-16 Ultrahaptics IP Two Limited Throwable interface for augmented reality and virtual reality environments
US10446953B1 (en) * 2018-06-07 2019-10-15 RabyConnectInc. Electrical connector

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DD221883A1 (de) * 1983-11-24 1985-05-02 Dresden Elektroschaltgeraete Spannstueck
FR2565039A1 (fr) * 1984-05-28 1985-11-29 Morizet Jacques Perfectionnement aux serre-fils pour borne de connexion
EP0336251A2 (de) 1988-03-31 1989-10-11 Asea Brown Boveri Aktiengesellschaft Schraubklemme
JPH0415164U (de) * 1990-05-29 1992-02-06
EP0481309A2 (de) * 1990-10-13 1992-04-22 ABBPATENT GmbH Klemme für ein Schaltgerät
FR2696584A1 (fr) 1992-10-05 1994-04-08 Merlin Gerin Borne de raccordement pour appareillage électrique de puissance.
DE19513281A1 (de) 1995-04-07 1996-10-10 Kopp Heinrich Ag Kombianschlußklemme
EP1085601A1 (de) 1999-09-15 2001-03-21 Schneider Electric Industries SA Elastische Käfigklemme
US20020081914A1 (en) * 2000-12-22 2002-06-27 Kouetsu Takaya Terminal device of electric apparatus

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FR2894722B1 (fr) * 2005-12-09 2009-05-22 Schneider Electric Ind Sas Borne de connexion electrique et appareil electrique de coupure comportant une telle borne
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213669A (en) * 1978-09-11 1980-07-22 Gte Sylvania Wiring Devices Incorporated Terminal collar
DD221883A1 (de) * 1983-11-24 1985-05-02 Dresden Elektroschaltgeraete Spannstueck
FR2565039A1 (fr) * 1984-05-28 1985-11-29 Morizet Jacques Perfectionnement aux serre-fils pour borne de connexion
EP0336251A2 (de) 1988-03-31 1989-10-11 Asea Brown Boveri Aktiengesellschaft Schraubklemme
JPH0415164U (de) * 1990-05-29 1992-02-06
EP0481309A2 (de) * 1990-10-13 1992-04-22 ABBPATENT GmbH Klemme für ein Schaltgerät
FR2696584A1 (fr) 1992-10-05 1994-04-08 Merlin Gerin Borne de raccordement pour appareillage électrique de puissance.
DE19513281A1 (de) 1995-04-07 1996-10-10 Kopp Heinrich Ag Kombianschlußklemme
EP1085601A1 (de) 1999-09-15 2001-03-21 Schneider Electric Industries SA Elastische Käfigklemme
US20020081914A1 (en) * 2000-12-22 2002-06-27 Kouetsu Takaya Terminal device of electric apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3624270A1 (de) * 2018-09-13 2020-03-18 Schneider Electric Industries SAS Anschlussklemme eines elektrischen leiters an der klemmenleiste eines elektrischen geräts, und elektrisches schutzgerät, das eine solche klemme umfasst
FR3086114A1 (fr) * 2018-09-13 2020-03-20 Schneider Electric Industries Sas Borne de raccordement d'un conducteur electrique a la plage de raccordement d'un appareil electrique, et appareil de protection electrique comportant une telle borne
US10833430B2 (en) 2018-09-13 2020-11-10 Schneider Electric Industries Sas Terminal for connecting an electrical conductor to the connection pad of an electrical device, and electrical protection device including such a terminal

Also Published As

Publication number Publication date
AR093104A1 (es) 2015-05-20
BR102013027276A2 (pt) 2014-10-21
FR2997237A1 (fr) 2014-04-25
US9153881B2 (en) 2015-10-06
CN103779676B (zh) 2018-05-11
PL2725660T3 (pl) 2018-01-31
FR2997237B1 (fr) 2014-11-21
RU2619072C2 (ru) 2017-05-11
UA118329C2 (uk) 2019-01-10
BR102013027276B1 (pt) 2021-02-09
MA35087B1 (fr) 2014-05-02
EP2725660B1 (de) 2017-08-16
US20140113507A1 (en) 2014-04-24
RU2013144919A (ru) 2015-04-20
MX368282B (es) 2019-09-27
TWI590546B (zh) 2017-07-01
ES2646588T3 (es) 2017-12-14
PE20141714A1 (es) 2014-12-06
MX2013010317A (es) 2014-04-24
TW201417423A (zh) 2014-05-01
CN103779676A (zh) 2014-05-07

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