EP0541459B1 - Schraubklemme für elektrisches Gerät mit gegossenem Isoliergehäuse - Google Patents

Schraubklemme für elektrisches Gerät mit gegossenem Isoliergehäuse Download PDF

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Publication number
EP0541459B1
EP0541459B1 EP92420386A EP92420386A EP0541459B1 EP 0541459 B1 EP0541459 B1 EP 0541459B1 EP 92420386 A EP92420386 A EP 92420386A EP 92420386 A EP92420386 A EP 92420386A EP 0541459 B1 EP0541459 B1 EP 0541459B1
Authority
EP
European Patent Office
Prior art keywords
cage
screw
tooth
terminal according
tunnel cage
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.)
Expired - Lifetime
Application number
EP92420386A
Other languages
English (en)
French (fr)
Other versions
EP0541459A1 (de
Inventor
Noel Lecorre
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 SE
Original Assignee
Merlin Gerin SA
Schneider Electric SE
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 Merlin Gerin SA, Schneider Electric SE filed Critical Merlin Gerin SA
Publication of EP0541459A1 publication Critical patent/EP0541459A1/de
Application granted granted Critical
Publication of EP0541459B1 publication Critical patent/EP0541459B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • 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

Definitions

  • the torque resulting from the tightening of the screw causes a slight rotational movement of the cage in the cell.
  • the resulting reaction forces can cause deformation of the housing by spreading the two shells.
  • the risk of damage to the housing depends on the extent of the deformation, and also depends on the nature of the insulating molding material.
  • the object of the invention is to provide a cage terminal causing no significant deformation of the housing during the connection operation.
  • the terminal according to the invention is characterized in that the cage is equipped with centering means cooperating with the walls delimiting the cell to derive from the tightening and / or loosening torque of the screw, a movement of approach of the two shells of the housing.
  • the cage centering means comprise a pair of first and second teeth projecting from the two opposite edges on the lateral wings of the cage, each tooth having an anchoring edge intended to become embedded in the plastic of the shell. when tightening the screw.
  • Each tooth has an inclined face for connection between the anchoring edge and the internal surface of the corresponding wing, the slope of said inclined face being arranged to apply a reaction force directed towards the inside of the shell. of the housing.
  • the presence of the gripping teeth makes it possible to obtain a first effect of bringing the two shells together, and a second effect of blocking the rotation of the terminal by embedding the teeth in the plastic material of the alveolus.
  • the combination of these two effects contributes to ensuring effective clamping of the conductor without deformation of the insulating housing.
  • the centering of the terminal is also ensured during the loosening of the screw, by providing at least a third projecting tooth, opposite the first tooth.
  • Figure 1 is a schematic perspective view of the terminal according to the invention, one of the shells of the housing not being shown.
  • Figure 2 shows an elevational view of the terminal of Figure 1, in the lowered mounting position in the housing.
  • Figure 3 shows the cell of the housing after removal of the terminal.
  • Figure 4 is an identical view to Figure 2, in the raised position of the terminal after maximum screwing of the screw.
  • Figure 5 is a section along line 5-5 of Figure 4.
  • FIG. 6 illustrates the diagrams of variation of the deformation of the housing as a function of the value of the tightening torque, respectively for a terminal according to the prior art (curve D1), and for a terminal according to the invention, (curve D2) .
  • Figure 7 shows a view identical to Figure 5, of an alternative embodiment.
  • a screw connection terminal 10 12 is positioned with play in a cell 14 of a housing 16 containing a modular electrical device, in particular a circuit breaker.
  • the housing 16 is made of molded insulating material, by assembling two shells 18,20 having conjugate shapes coming into engagement along a junction line 22. The fixing of the two shells 18,20 takes place after mounting of the mechanism , by means of rivets (not shown) in metallic or plastic material.
  • Terminal 10 comprises a cage 24 made of conductive metallic material engaged on a fixed contact pad 26 electrically connected with the separable contacts of the device.
  • the cage 24 is shaped according to a closed frame of substantially rectangular section.
  • the upper face of the cage 24 is provided with a collar 28 with circular threaded hole 30, forming a nut 31 for receiving the clamping screw 12.
  • the bottom 32 of the cage 24 is arranged opposite the hole 30 of the nut, and is connected to the upper face by two lateral wings 34, 36 extending parallel to the axis of the screw 12.
  • Each narrow lateral face of the housing 16 has an orifice 38 for the introduction of a cable 40 for connection into the space provided between the contact pad 26 and the bottom 32 of the cage 24.
  • the cage 24 is equipped at its lower part with a flap 42 in the form of a flap fixed at right angles to the bottom 32, to partially obstruct the orifice 38 when the cage 24 slides upward, when the screw is tightened 12.
  • the cage 24 is produced by folding a strip of sheet metal, the opposite ends of which are connected to one another by a stapling system 44.
  • the cage 24 comprises centering means intended to become embedded in the plastic material of the housing 16, when the screw 12 is tightened, so as to block the rotation of the cage 24 inside. of the cell 14, without causing deformation by separation of the two shells 18,20.
  • the centering means of the cage 24 are formed by a pair of first and second teeth 46,48 projecting slightly from the two opposite edges of the lateral wings 34,36.
  • the teeth 46,48 are arranged at substantially the same level located between the upper face of the cage 24 and the stapling system 44.
  • the edge 50 for anchoring each tooth 46,48 extends along a vertical line parallel to the axis of the screw 12.
  • An inclined face 52 connects each edge 50 to the rectilinear internal surface 53 of the corresponding wing 34, 36.
  • the orientation of the slope of the two teeth 46, 48 generates two longitudinal shearing components F1C and F2C parallel to the junction line 22 and in opposite directions, and two transverse components F1R and F2R, perpendicular to the junction line 22, and opposite directions.
  • the shear components F1C and F2C of the two shells 18,20 are collected in a conventional manner by the fixing rivets of the housing 16.
  • the two other transverse components F1R and F2R tend to bring the two shells 18,20 closer together when tightening the cable 40 by the screwing action of screw 12.
  • the cage 24 is locked in rotation, and slides upwards by bringing the bottom 32 closer to the contact pad 26 with jamming of the cable 40.
  • the 'inlay of the teeth 46,48 causes the formation of two grooves 54 in the plastic material of the housing 16. The effect of bringing the two shells 18,20 together is maintained during the sliding phase of the cage 24 and teeth inlay 46.48.
  • FIG. 6 illustrates two curves D1 and D2 representative of the deformation E of the insulating housing as a function of the value of the torque C for tightening.
  • the curve D1 corresponds to the use of a terminal of the prior art, which causes a progressive separation of the two shells of the housing as soon as a tightening torque is applied when the cable is connected.
  • the value A represents the initial width of the housing after fixing the assembly rivets.
  • Curve D2 shows the variation of the width of the housing with the use of a terminal according to Figures 1 to 5.
  • the width remains substantially constant until a tightening torque of 3N-n.
  • Such a limit torque is rarely reached with miniature circuit breakers of 18mm pitch.
  • FIGS. 2 and 3 a longitudinal offset is provided between the lower part constituting a first compartment 56 and the upper part constituting the second compartment 58 of the cell 14 for housing the terminal 10. This results in the presence of a clearance J between the cage 24 and the internal wall of the lower part 56, authorizing the mounting of the terminal 10 during the assembly of the circuit breaker.
  • the teeth 46,48 do not come into engagement with the wall of the upper part 58. The inlaying of the teeth 46,48 takes place from the start of the sliding stroke of the cage 24 up.
  • the first effect of bringing together the two shells 18, 20 is independent of the presence of the clearance J.
  • the narrowing of the upper section 58 of the cell makes it possible to obtain a second effect of blocking in rotation of the terminal during the sliding of the cage 24 upwards.
  • the combination of the two effects contributes to preserving any deformation of the housing 16 by the tightening action of the screw 12.
  • the cage 24 additionally comprises a third tooth 60, arranged on the wing 34 opposite the first tooth 46.
  • the orientation of the slope of the third tooth 60 is reversed with respect to that of the first tooth 46.
  • the screw 12 is loosened (indicated by arrow D)
  • the projecting edge 62 of the third tooth 60 becomes embedded in the plastic wall by exerting an oblique reaction force F3 on the shell 20.
  • This force F3 is substantially perpendicular to the slope of the tooth 60, and is broken down into two components F3R and F3C.
  • the transverse component F3R urges the shell 20 towards the other shell 18, that is to say in the direction of approximation.
  • a single tooth 60 is sufficient in the direction D of loosening. It is clear that a fourth tooth (not shown) can be provided on the wing 36 opposite the second tooth 48 to balance the forces on the two shells 18,20 when the screw 12 is loosened.
  • the cage 24 of the terminal 10 can be fixed inside the cell 14. The same effects of bringing the shells 18, 20 closer together and of encrusting the teeth 46, 48, 60 are preserved during the tightening and / or loosening of the screw 12.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Breakers (AREA)

Claims (9)

  1. Klemme zum Anschluß eines Leiters (40) an ein Schaltgerät in einem Isolierstoffgehäuse (16), das aus zwei Halbschalen (18, 20) zusammengefügt ist, die entlang einer Verbindungslinie (22) aneinanderstoßen, wobei die genannte Klemme (10) in einer Ausnehmung (14) des Gehäuses (16) montiert ist und
    - einem rahmenförmigen, der Ausnehmung (14) angepaßten und aus einem leitenden metallischen Werkstoff bestehenden Käfig (24) zur Aufnahme des durch eine Öffnung (38) im Gehäuse (16) eingeführten Leiters (40)
    - sowie eine Klemmschraube (12) zum Festziehen und Lösen des Leiters (40) im Käfig (24) umfaßt,
    dadurch gekennzeichnet, daß der Käfig (24) mit Zentriermitteln ausgestattet ist, die mit den die Ausnehmung (14) begrenzenden Wandungen derart zusammenwirken, daß das beim Anziehen und/oder Lösen der Klemmschraube (12) ausgeübte Drehmoment zur Erzeugung einer relativen Annäherungsbewegung der beiden Halbschalen (18, 20) des Gehäuses (16) genutzt wird.
  2. Anschlußklemme nach Anspruch 1, dadurch gekennzeichnet, daß die Zentriermittel des Käfigs (24) eine erste und eine zweite Nase (46, 48) umfassen, die aus den sich gegenüberliegenden Kanten der Seitenteile (34, 36) des Käfigs (24) hervorstehen, wobei jede Nase (46, 48) eine Krallkante (50) aufweist, die sich beim Anziehen der Schraube (12) in den Kunststoff der entsprechenden Gehäuseschale (20, 18) einpreßt.
  3. Anschlußklemme nach Anspruch 2, dadurch gekennzeichnet, daß jede Nase (46, 48) zwischen der Krallkante (50) und der Innenfläche (53) des entsprechenden Seitenteils (34, 36) eine Schräge (52) aufweist, deren die Neigung so ausgebildet ist, daß eine ins Innere des Gehäuses (16) gerichtete Reaktionskraft (F1, F2) auf die Halbschale (20, 18) ausgeübt wird.
  4. Anschlußklemme nach Anspruch 3, dadurch gekennzeichnet, daß die Innenfläche (53) jedes Seitenteils (34, 36) des Käfigs (24) parallel zur Verbindungslinie (22) der beiden Halbschalen (18, 20) verläuft, und daß die Schräge jeder Nase (46, 48) einen spitzen Winkel mit der genannten Verbindungslinie (22) bildet.
  5. Anschlußklemme nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Käfig (24) beim Drehen der Schraube (12) im Innern der Ausnehmung (14) gleitend verschoben wird, und daß sich durch die Einpreßwirkung beider Nasen (46, 48) entlang des Verschiebewegs des genannten Käfigs (24) jeweils eine Nut (54) bildet.
  6. Anschlußklemme nach Anspruch 5, dadurch gekennzeichnet, daß der Käfig (24) der Klemme (10) bei der Montage des Schaltgeräts mit Spiel in ein erstes Abteil (56) der Ausnehmung (14) eingesetzt wird, und daß die Einpreßwirkung der Nasen (46, 48) zu Beginn des Verschiebewegs in einem zweiten Abteil (58) der Ausnehmung (14) einsetzt, wobei das genannte zweite Abteil (58) einen gegenüber dem ersten Abteil (56) verringerten Querschnitt hat, so daß der Käfigs (24) in Drehrichtung blockiert wird.
  7. Anschlußklemme nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Käfig (24) fest im Innern der Ausnehmung (14) montiert wird.
  8. Anschlußklemme nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Zentriermittel des Käfigs (24) mindestens eine dritte vorstehende Nase (60) umfassen, die auf demselben Seitenteil (34) gegenüber der ersten Nase (46) angeordnet ist und eine entgegengesetzte Neigung zur Ausübung einer Reaktionskraft (F3) aufweist, die beim Lösen der Schraube (12) die Annäherung der beiden Halbschalen (18, 20) bewirkt.
  9. Anschlußklemme nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß die Schraube (12) in eine an der Oberseite des Käfigs (24) ausgebildete kreisrunde Gewindebohrung (30) eingesetzt ist, und daß die Nasen (46, 48, 60) in der Nähe der genannten Oberseite annähernd in derselben Höhe des Käfigs (24) angeordnet sind.
EP92420386A 1991-11-07 1992-10-28 Schraubklemme für elektrisches Gerät mit gegossenem Isoliergehäuse Expired - Lifetime EP0541459B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9113858 1991-11-07
FR9113858A FR2683680B1 (fr) 1991-11-07 1991-11-07 Borne a vis pour un appareil electrique a boitier isolant moule.

Publications (2)

Publication Number Publication Date
EP0541459A1 EP0541459A1 (de) 1993-05-12
EP0541459B1 true EP0541459B1 (de) 1995-04-12

Family

ID=9418796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92420386A Expired - Lifetime EP0541459B1 (de) 1991-11-07 1992-10-28 Schraubklemme für elektrisches Gerät mit gegossenem Isoliergehäuse

Country Status (7)

Country Link
EP (1) EP0541459B1 (de)
JP (1) JP3293900B2 (de)
KR (1) KR100256632B1 (de)
CN (1) CN1035852C (de)
DE (1) DE69202037T2 (de)
ES (1) ES2074855T3 (de)
FR (1) FR2683680B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69602758T2 (de) 1996-11-29 2000-03-02 Hager Electro S.A., Obernai Leiteranschlussklemme eines modularen elektrischen Gerätes
DE102007006367A1 (de) 2007-02-08 2008-08-21 Siemens Ag Leitungsschutzschalter mit Klemme
DE102007035016A1 (de) 2007-07-26 2009-01-29 Abb Ag Schraubanschlussklemme und Verfahren zu deren Herstellung
DE102011087584A1 (de) * 2011-12-01 2013-06-06 Siemens Aktiengesellschaft Kabelschuh
CN108429020B (zh) * 2017-04-19 2020-02-14 深圳市富兴易翔机电设备有限公司 强电单级连接器结构
CN108761140B (zh) * 2018-08-28 2022-04-15 深圳市开步电子有限公司 分流器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1790153A1 (de) * 1967-09-29 1972-01-20 Telemeccanica Elettrica Ohg Ri Klemme fuer den Anschluss elektrischer Leiter
DE3727357A1 (de) * 1987-08-17 1989-03-02 Asea Brown Boveri Verankerung von einbauteilen in elektrischen schaltgeraeten
EP0334975B1 (de) * 1988-03-26 1992-05-13 Weidmüller Interface GmbH & Co. Leiteranschluss

Also Published As

Publication number Publication date
FR2683680B1 (fr) 1993-12-31
JPH05217453A (ja) 1993-08-27
KR930011332A (ko) 1993-06-24
JP3293900B2 (ja) 2002-06-17
ES2074855T3 (es) 1995-09-16
FR2683680A1 (fr) 1993-05-14
KR100256632B1 (ko) 2000-05-15
CN1035852C (zh) 1997-09-10
DE69202037D1 (de) 1995-05-18
EP0541459A1 (de) 1993-05-12
CN1072291A (zh) 1993-05-19
DE69202037T2 (de) 1995-10-26

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