EP0222685A1 - Montage de contacts avec des leviers de contact montés pivotant l'un par rapport à l'autre dans un support - Google Patents

Montage de contacts avec des leviers de contact montés pivotant l'un par rapport à l'autre dans un support Download PDF

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Publication number
EP0222685A1
EP0222685A1 EP86730162A EP86730162A EP0222685A1 EP 0222685 A1 EP0222685 A1 EP 0222685A1 EP 86730162 A EP86730162 A EP 86730162A EP 86730162 A EP86730162 A EP 86730162A EP 0222685 A1 EP0222685 A1 EP 0222685A1
Authority
EP
European Patent Office
Prior art keywords
holder
contact
contact arrangement
arrangement according
bearing 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.)
Granted
Application number
EP86730162A
Other languages
German (de)
English (en)
Other versions
EP0222685B1 (fr
Inventor
Joachim Dipl.-Ing. Grad. Kroll
Reinhard Dipl.-Ing. Kugler
Bernd Dipl.-Phys. Rambotzki
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0222685A1 publication Critical patent/EP0222685A1/fr
Application granted granted Critical
Publication of EP0222685B1 publication Critical patent/EP0222685B1/fr
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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars

Definitions

  • the invention relates to a contact arrangement with a plurality of contact levers which are pivotally mounted in a holder relative to one another, the holder in turn being movable about a fixed bearing for switching on and off.
  • a contact arrangement of this type is known, for example, from US-A-3 402 274.
  • attractive forces act between adjacent contact levers and therefore current flows through them in the same direction, while the entire movable part of the contact arrangement can be exposed to lateral magnetic forces.
  • these influences lead to a relative displacement of the contact piece supports, which not only causes wear due to friction of the contact surfaces relative to one another, but also leads to scratches and erosion.
  • the invention has for its object to increase the performance of multi-unit contact arrangement in that, despite the series production of such contact arrangements, the bearing tolerance of the movable part of the contact arrangement is reduced as much as possible.
  • the bearing is designed as a bearing bracket encompassing the holder, which is composed of parts connected to one another in an adapted and unchangeable distance to the holder.
  • the bearing bracket receives its final dimensions only when it is assembled with the holder of the contact lever. Regardless of the width of the holder, which can fluctuate due to the tolerance of the semi-finished products used and the tolerance of surface layers as well as of insert parts and similar influences, the same bearing tolerance is always achieved within the bracket.
  • Such a bearing bracket can advantageously have two mirror-inverted angles, one leg of which is arranged parallel to the side walls of the holder and the other legs of which are arranged one above the other, the further legs being connected at the correct distance by overlying connecting straps.
  • This makes it possible to assemble the bearing bracket from different materials in order to achieve desired properties, particularly in magnetic terms. If, for example, connecting lugs made of a non-magnetic steel or another non-magnetic material are selected, the formation of a magnetic enclosure of the contact levers is avoided.
  • connection of the parts of the bearing bracket at an unchangeable distance can be brought about in that the connecting straps are provided with openings for use as a die, into which material from the further legs of the angle can be pressed by a plastic deformation.
  • a connection of the parts of the bearing bracket is achieved, which can absorb considerable shear forces and which also ensures the cohesion of the parts of the bearing bracket within the scope of a normal, workshop-like handling, up to the matrix connection other Lanyards are attached, e.g. B. rivets, screws or a connection method, such as. B. spot welding has been applied.
  • the additional fastening means only have to absorb forces which act in the direction of lifting the parts apart, since the shear forces acting perpendicularly to them are absorbed by the die connection.
  • the angle 1 shown in FIGS. 1, 2 and 3 is used to produce a bearing bracket, as shown in FIGS. 4 and 5.
  • the angle 1 has a leg 2 which is provided with a through opening 3 for a bearing pin.
  • Another leg 4 standing at right angles to leg 2 likewise contains a through opening 5 which is provided for receiving a screw to be used in the course of the manufacture of the bearing bracket.
  • An extension 6, which also has a through opening 7, is bent out of the plane of the leg 4.
  • the part of the leg 4 located below the extension 6 has a laterally open recess 10 which is used for fastening when the finished bearing bracket is installed in a switching device.
  • a complete bearing bracket 11, as shown in Figures 4 and 5, consists of an angle 1 according to Figures 1, 2 and 3 and a further, completely mirror image of this angle 1 '; Furthermore, connecting straps 12 in the form of rectangular pieces of sheet metal are required. These parts, ie the angles 1 and 1 'and the connecting straps 12 are connected such that the distance between the legs 2 and 2' of the angles 1 and 1 'with as much as possible corresponds to the small tolerance of the width d of a holder 12 used to hold contact levers. To position the parts an engaging in side walls 13 of the holder 12 bearing pin 14 can be used, the later Be the pivotal movement of the holder 12 is provided for switching the contact arrangement on and off.
  • the legs 4 and 4 ' are the angles 1 and 1' with a distance to each other.
  • the extensions 6 and 6 ' are in the same position.
  • connecting tabs 15 in the form of rectangular pieces of sheet metal made of a non-magnetic material are used, which are each provided with two through openings 16 and two further, outer, larger through openings 17. Due to a plastic deformation of the material of the legs 4 and extensions 6, material is now pressed into the openings 16 of the connecting straps 15, as a result of which a positive connection between the angles 2 and the connecting straps 15 is created. This process can be carried out in different ways, since both hand tools and machine devices can be used.
  • the result of the plastic deformation is a protruding into the openings 16 pin of the legs 4 and 4 'and the extensions 6 and 6', which fix the angles 1 and 1 'at a correct distance.
  • suitable dimensioning of the openings 16 and the degree of plastic deformation it can be achieved that the pegs formed can completely absorb the shear forces which occur in the later operation of the contact arrangement.
  • the through openings 17 of the connecting straps 15 are aligned with the through openings 5 of the legs 4 and 4 'and the through openings 7 of the extensions 6 and 6'.
  • screws By inserting screws into these aligned openings the parts of the bearing bracket 11 are permanently connected, the screws merely ensuring the cohesion of the parts, but not taking over the shear forces that occur or determining the dimensional accuracy of the bearing bracket 11.
  • other fasteners e.g. B. rivets, or spot welding or a similar method can be used.
  • screws have the advantage that the bearing bracket can be dismantled, since the die connection can also be separated by suitable tools.
  • connecting lugs can be used without die extinguisher, and through holes can be made in the correctly positioned position of the parts, into which suitable connecting means, e.g. B. Grooved pins can be inserted.
  • suitable connecting means e.g. B. Grooved pins
  • rivets can be used to create both the temporary and shear link as well as a permanent and permanent connection. In this case, as well as when the parts are welded locally, there is no possibility of disassembling the bearing bracket if this occurs immediately after the initial connection or later, e.g. B. at a repair of a circuit breaker is desired.
  • a contact arrangement 20 for a low-voltage circuit breaker which comprises a fixed part 21 and a movable part 22.
  • the movable part 21 has an insulating block 23, which has an upper connecting bar 24 and a lower forked to closing rail 25 carries.
  • a stationary contact body 26 with a contact piece support 27 and a burn-off contact body 31 with a further contact piece support 32 and an arcing horn 33 are connected in a conductive connection to the lower connecting bar 25 Guide the burnout contact lever 36.
  • the two outer contact levers 35 have contact piece supports 37, while the middle contact lever 36 has a movable burn-off contact body 40 with a contact piece support 41.
  • An arcing horn 42 is also connected to the burn-off contact body 40.
  • the contact lever 35 and 36 are pivotable about a hinge pin 43 and are under the influence of compression springs, which are arranged in a known manner between the legs of the current strips 34.
  • the contact levers 35 and 36 are located in a holder 44, which corresponds in its construction to the holder 13 in FIGS. 4 and 5, but has a somewhat different shape of its side parts 45.
  • the side parts 45 receive a bearing pin 46 and a coupling pin 47.
  • the bearing pin 46 serves as a pivot bearing of the movable part 22 of the contact arrangement 1 around a bearing bracket 50, which corresponds in principle to the bearing bracket 11 in FIGS. 5 and 6 and which is fastened to the insulating block 23.
  • Insulating coupling members 51 which are connected to a suitable drive device of the circuit breaker, engage on the coupling bolt 47.
  • the side walls 45 of the holder 44 are held in the distance caused by the contact levers 35 and 36 and between the intermediate layers 52 located between them by two or more bolts 53. Based on the known influences, the width of the holder can therefore be different. At this width dimension, the bracket is adapted in the manner described, so that even with standard Production of contact arrangements, individual dimensional deviations are always taken into account. all contact arrangements thus have a practically achievable lowest possible lateral guiding tolerance.
  • support brackets 54 for the current strips 34 engage between the side walls 45 of the holder 44 and the bearing bracket.
  • these angles have no influence on the interaction of the bearing bracket 50 with the holder 44, since these parts are provided with facing impressions 55 and 56, which serve as guide surfaces. Due to the impressions 55 and 56, there is a distance between the side walls 45 of the holder 44 and the bearing bracket 50, which is in any case greater than the thickness of the support bracket 54.

Landscapes

  • Breakers (AREA)
  • Manufacture Of Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP86730162A 1985-11-07 1986-10-20 Montage de contacts avec des leviers de contact montés pivotant l'un par rapport à l'autre dans un support Expired - Lifetime EP0222685B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853539786 DE3539786A1 (de) 1985-11-07 1985-11-07 Kontaktanordnung mit in einem halter relativ zueinander schwenkbar gelagerten kontakthebeln
DE3539786 1985-11-07

Publications (2)

Publication Number Publication Date
EP0222685A1 true EP0222685A1 (fr) 1987-05-20
EP0222685B1 EP0222685B1 (fr) 1990-02-07

Family

ID=6285559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730162A Expired - Lifetime EP0222685B1 (fr) 1985-11-07 1986-10-20 Montage de contacts avec des leviers de contact montés pivotant l'un par rapport à l'autre dans un support

Country Status (4)

Country Link
US (1) US4719325A (fr)
EP (1) EP0222685B1 (fr)
JP (1) JPH0746543B2 (fr)
DE (2) DE3539786A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998009306A1 (fr) * 1996-08-28 1998-03-05 Siemens Aktiengesellschaft Dispositif de contact de commutation mobile a support logeant des leviers de contact

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005206A (en) * 1998-05-07 1999-12-21 Eaton Corporation Electrical switching apparatus with improved contact arm carrier arrangement
US6072136A (en) * 1998-05-07 2000-06-06 Eaton Corporation Electrical switching apparatus with modular operating mechanism for mounting and controlling large compression close spring
DE10012605A1 (de) 2000-03-09 2001-09-13 Siemens Ag Schaltpol für Niederspannungs-Schaltgeräte mit linear bewegbarem Kontaktträger
DE10062761A1 (de) * 2000-12-13 2002-06-20 Siemens Ag Bewegbarer Kontaktträger zur Aufnahme von Kontakthebeln für Niederspannungs-Leistungsschalter
US7368677B2 (en) * 2005-12-14 2008-05-06 Eaton Corporation Reverse bias hatchet reset spring

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402274A (en) * 1965-10-01 1968-09-17 Square D Co Contact structure for a power circuit breaker
US3770922A (en) * 1972-07-27 1973-11-06 Ite Imperial Corp Circuit breaker contact structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5820442B2 (ja) * 1976-12-30 1983-04-23 ウエスチングハウス エレクトリック コ−ポレ−ション しや断器
JPS576140U (fr) * 1980-06-10 1982-01-13
JPS58165961U (ja) * 1982-04-30 1983-11-05 富士電機株式会社 回路しや断器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402274A (en) * 1965-10-01 1968-09-17 Square D Co Contact structure for a power circuit breaker
US3770922A (en) * 1972-07-27 1973-11-06 Ite Imperial Corp Circuit breaker contact structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998009306A1 (fr) * 1996-08-28 1998-03-05 Siemens Aktiengesellschaft Dispositif de contact de commutation mobile a support logeant des leviers de contact
US6225585B1 (en) 1996-08-28 2001-05-01 Siemens Ag Movable switch contact arrangement having a contact lever holder with a contact lever

Also Published As

Publication number Publication date
JPS62110209A (ja) 1987-05-21
JPH0746543B2 (ja) 1995-05-17
US4719325A (en) 1988-01-12
DE3669010D1 (de) 1990-03-15
EP0222685B1 (fr) 1990-02-07
DE3539786A1 (de) 1987-05-14

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