EP0559585B1 - Borne de raccordement à étrier d'épaisseur variable et à écrou serti - Google Patents

Borne de raccordement à étrier d'épaisseur variable et à écrou serti Download PDF

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Publication number
EP0559585B1
EP0559585B1 EP19930420089 EP93420089A EP0559585B1 EP 0559585 B1 EP0559585 B1 EP 0559585B1 EP 19930420089 EP19930420089 EP 19930420089 EP 93420089 A EP93420089 A EP 93420089A EP 0559585 B1 EP0559585 B1 EP 0559585B1
Authority
EP
European Patent Office
Prior art keywords
arms
thickness
nut
connection terminal
bracket
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
EP19930420089
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0559585A1 (fr
Inventor
Noel Le Corre
Jean-Jacques Nardin
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
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0559585A1 publication Critical patent/EP0559585A1/fr
Application granted granted Critical
Publication of EP0559585B1 publication Critical patent/EP0559585B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut

Definitions

  • connection terminal for electrical equipment comprising a U-shaped bracket having two rectilinear and parallel arms joined at the base by a common core constituting the semi-arched bottom of the terminal, a two-nut lateral tenons, inserted inside the U in opposite mortises made in the vicinity of the ends of the two arms, and a clamping screw housed in a tapped hole in the nut, and extending in the median plane of symmetry parallel to the two arms.
  • the phase and neutral circuits are housed in a common insulating box having a reduced width, in particular 18mm.
  • a neutral terminal and a phase terminal must be placed side by side in adjacent drums on each side connection side of the housing.
  • Each terminal must have sufficient mechanical strength to withstand the tightening torque, and oppose the pulling of the cables, and must also authorize the clamping of cables of different diameters.
  • the clamp of the terminal is generally made from a relatively thick sheet metal which limits the spacing between the arms. The connection of cables of large diameters is then impossible if one wishes to keep the overall dimensions 18 mm wide. As a result, the ratings of the unipolar and neutral circuit breakers are limited to 32A.
  • the object of the invention is to improve the structure of a connection terminal to make use of it in electrical devices of large sizes and with reduced overall dimensions.
  • the terminal according to the invention is characterized in that the half-vaulted core has a thickness substantially greater than that of each arm, said thickness being variable to constitute a beam embedded at its two ends at the base of the arms, and having a uniform mechanical resistance for a predetermined tightening torque, when the cable is wedged between the core and the underside of the contact pad, and the thickness of the half-arch is maximum in the median plane of the stirrup, and gradually decreases to the base of each arm, the pressure on the beam acting in a distribution substantially parabolic and symmetrical with respect to the median plane.
  • the assembly of the stirrup with the nut is effected by crimping the tenons in the mortises generating two mechanical interlocking connections.
  • Figure 1 is a sectional view of the connection terminal according to the invention, inserted on a contact pad.
  • Figure 2 is a plan view of Figure 1, after removal of the clamping screw.
  • Figure 3 shows a side view of Figure 1.
  • FIG. 4 represents a perspective view of the caliper and nut assembly of the terminal.
  • Figure 5 is a view of the sheet metal strip cut for the stirrup manufacturing.
  • Figure 6 shows a perspective view of the nut.
  • Figure 7 is a partial view on an enlarged scale of the stirrup.
  • a connection terminal 10 for electrical equipment comprises a U-shaped bracket 12 made of conductive metallic material from a cut sheet 13 (FIG. 5).
  • the stirrup 12 has two parallel arms 14.16 joined at the base by a common core 18 having a slightly curvilinear profile constituting the half-arched bottom of the stirrup 12.
  • a nut 20 with two opposite lateral pins 22.24 is inserted inside the U in corresponding mortises 26,28 of rectangular shapes, formed in the vicinity of the ends of the two arms 14,16.
  • the nut 20 is provided in its central zone with a tapped circular orifice 30 with internal thread intended to cooperate with the external thread of a screw 32 with clamping head 34.
  • the screwing of the clamping head 34 causes a displacement in translation of the screw 32 in an axial direction parallel to the two arms 14,16.
  • the end of the screw 32 is capable of bearing on the upper face of a fixed contact pad 36 (FIG. 1), arranged with clearance between the sides of the arms 12,14 and in electrical connection with the contact circuit of the 'equipment.
  • the cable 38 to be connected is introduced into terminal 10 between the core 18 of the stirrup 12 and the underside of the contact pad 36.
  • the relative displacement of the stirrup 12 when the screw 32 is screwed causes an effect jamming of the cable 38 between the core 18 and the fixed contact pad 36.
  • the front face of the core 18 of the stirrup 12 is provided with a flap-shaped tongue 40 folded at an angle downwards.
  • the flap 40 extends perpendicularly to the two arms 14, 16, so as to progressively close off the inactive portion of the orifice of the housing during the translational movement of the stirrup 12 in the direction of the contact pad 36.
  • the half-vault of the core 18 comprises two triangular openings 41,42 disposed in the central zone symmetrically with respect to the median plane of trace 43, and cooperating with two teeth 44,46 projecting from the lower surface of the contact pad 36, to allow the connection of cables or conductors of small diameters.
  • variable thickness of the half-vault of the core 18 is outside of its two ends 48.50 at the base of each arm 14.16 always greater than that of each arm 14.16 to support the mechanical stresses of tightening of the cable 38 by the contact pad 36 and the screw 32.
  • the tightening force F located in the median plane 43 exerts maximum pressure on the central part of the half-arch. The thickness at this point is maximum, and gradually decreases to the base of each straight arm 14,16.
  • the entire semi-vault with variable thickness constitutes a beam working at bending with embedding at its two ends 48, 50.
  • the pressure on the beam due to the tightening of the screw 32 is not punctual, but is exerted in a distribution substantially parabolic and symmetrical with respect to the median plane 43.
  • variable-thickness half-vault makes it possible to obtain a stirrup bottom 12 of equal mechanical resistance to the cable clamping pressure 38.
  • the small thickness of the sheet of each arm 14, 16 gives rise to optimum spacing between the two sides of the stirrup 12, allowing the insertion of cables 38 of large diameters.
  • the thickness of the flap 40 corresponds to the average thickness of the core 18.
  • Obtaining the sheet metal part 13 bi-thickness of Figure 5 can be achieved by different methods.
  • a first method consists in producing a profiled strip by stretching in a die.
  • a second process provides for cutting a single-thickness strip corresponding to the maximum thickness of the core 18, followed by a crushing operation at the level of the two arms 14, 16 in order to obtain the minimum thickness for these two parts of the caliper 12.
  • the thickness of the two arms 14, 16 of the stirrup 12 is of the order of 0.7mm, while that of the core 18 at the level of the median plane 43 is located in the vicinity of 1.4mm.
  • Each tenon 22,24 of the nut 20 has an upper face cut in a bevel 52 (FIG. 6) facilitating engagement in the corresponding mortise 26,28.
  • the assembly of the nut 20 and the stirrup 12 is effected by crimping of the pins 22, 24 in the mortises 26, 28, so as to obtain two mechanical connections with interlocking without play supporting the traction forces and the box effect opposing the tightening torque by screw 32.
  • the crimping operation of the studs 22,24 can be replaced or supplemented by an electrical resistance welding operation carried out on two bosses 54,56 (FIG. 3) of each arm 14,16.
  • the two bosses 54,56 are located on the outer face of the arms 14,16 at the level of the nut 20, and on either side of the corresponding mortise 26,28.
  • Terminal 10 is particularly suitable for equipping a single-pole and neutral circuit breaker with ratings up to 40A, and whose housing has a width of 18mm.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Breakers (AREA)
  • Cable Accessories (AREA)
  • Clamps And Clips (AREA)
EP19930420089 1992-03-02 1993-02-26 Borne de raccordement à étrier d'épaisseur variable et à écrou serti Expired - Lifetime EP0559585B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9202575A FR2688095B1 (fr) 1992-03-02 1992-03-02 Borne de raccordement a etrier d'epaisseur variable et a ecrou serti .
FR9202575 1992-03-02

Publications (2)

Publication Number Publication Date
EP0559585A1 EP0559585A1 (fr) 1993-09-08
EP0559585B1 true EP0559585B1 (fr) 1996-06-12

Family

ID=9427330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930420089 Expired - Lifetime EP0559585B1 (fr) 1992-03-02 1993-02-26 Borne de raccordement à étrier d'épaisseur variable et à écrou serti

Country Status (6)

Country Link
EP (1) EP0559585B1 (ru)
CN (1) CN1040485C (ru)
DE (1) DE69303065T2 (ru)
ES (1) ES2090928T3 (ru)
FR (1) FR2688095B1 (ru)
RU (1) RU2107365C1 (ru)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721142B1 (fr) * 1994-06-13 1996-07-19 Schneider Electric Sa Appareil électrique muni d'une borne à vis.
GB2305549B (en) * 1995-09-22 1998-01-14 Birkett Electric Ltd Mechanical connectors
JPH1131441A (ja) * 1997-07-11 1999-02-02 Mitsubishi Electric Corp 端子接続装置
WO2001015276A1 (en) * 1999-08-24 2001-03-01 Tappat Engineering Pty Limited Electrical cable piercing connector
AU783805B2 (en) * 1999-08-24 2005-12-08 Tappat Engineering Pty Limited Electrical cable piercing connector
JP3627629B2 (ja) * 2000-06-27 2005-03-09 松下電工株式会社 ピラー端子
AT410613B (de) * 2001-03-20 2003-06-25 Moeller Gebaeudeautomation Kg Liftklemme
ES2239884B1 (es) * 2003-10-03 2006-11-16 General Electric Company Terminal universal de interruptor.
BR112012029330B1 (pt) * 2010-05-20 2019-08-27 Siemens Ag elemento de conexão para um dispositivo de comutação
CN102253248A (zh) * 2011-06-23 2011-11-23 江苏华富控股集团有限公司 一种电池充放电测试连接夹具及其使用方法
CN104282450A (zh) * 2014-10-10 2015-01-14 潞安职业技术学院 一种防爆高开卡爪

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE732063C (de) * 1936-09-03 1943-02-20 Dipl Raufmann Alois Schiffmann Aus Leichtmetall bestehende Klemme fuer Hochspannungsleiter
FR1180292A (fr) * 1957-07-30 1959-06-03 Perfectionnements apportés aux bornes de mise à la terre, notamment pour poteaux en béton supports de lignes électriques
IT8023035V0 (it) * 1980-10-07 1980-10-07 Breter Spa Struttura di serraggio dei conduttori per spine e prese elettriche
GB2151086B (en) * 1983-11-08 1987-09-30 Hepworth Electrical Developmen Electrical cable tap connectors
DE3707780A1 (de) * 1987-03-11 1988-09-22 Schlegel Georg Fa Schraubklemme fuer elektrische leiter
US5015205A (en) * 1989-11-07 1991-05-14 Franks George J Jr Cable clamp

Also Published As

Publication number Publication date
CN1076059A (zh) 1993-09-08
CN1040485C (zh) 1998-10-28
RU2107365C1 (ru) 1998-03-20
FR2688095B1 (fr) 1996-05-24
EP0559585A1 (fr) 1993-09-08
FR2688095A1 (fr) 1993-09-03
DE69303065T2 (de) 1996-12-19
DE69303065D1 (de) 1996-07-18
ES2090928T3 (es) 1996-10-16

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