EP0131297B1 - Appareil de commutation électromagnétique - Google Patents

Appareil de commutation électromagnétique Download PDF

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Publication number
EP0131297B1
EP0131297B1 EP84107977A EP84107977A EP0131297B1 EP 0131297 B1 EP0131297 B1 EP 0131297B1 EP 84107977 A EP84107977 A EP 84107977A EP 84107977 A EP84107977 A EP 84107977A EP 0131297 B1 EP0131297 B1 EP 0131297B1
Authority
EP
European Patent Office
Prior art keywords
switching device
magnet
leaf springs
spring
arms
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
Application number
EP84107977A
Other languages
German (de)
English (en)
Other versions
EP0131297A2 (fr
EP0131297A3 (en
Inventor
Sven Dipl.-Ing. Bachler
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of EP0131297A2 publication Critical patent/EP0131297A2/fr
Publication of EP0131297A3 publication Critical patent/EP0131297A3/de
Application granted granted Critical
Publication of EP0131297B1 publication Critical patent/EP0131297B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
    • H01H50/22—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil wherein the magnetic circuit is substantially closed

Definitions

  • the present invention relates to an electromagnetic switching device according to the preamble of claim 1.
  • the electromagnetic switching device can be, for example, a contactor.
  • Such a switching device is known from DE-U-1 914 697.
  • the magnetic cores are guided in grooves which are arranged in the switchgear housing.
  • Such a guide is associated with high friction and wear, since the magnetic cores have a relatively high weight. The consequence of this is that only a small part of the mechanical lifespan of 10 to 30 million scarf cycles required for certain contactors can be achieved. Even in a construction in which the magnetic cores are suspended by means of rotatable joints, the service life is relatively short because the bearings of the joints wear out prematurely.
  • a switching magnet arrangement for switching devices is known from AT-A-187 967, in which the magnetic core is fixedly arranged and a relatively easy moving magnet armature is provided.
  • This anchor is supported at its ends by a leaf spring, which is attached to the stationary magnetic core. Between its two end positions, the armature is only held by the springs. It can be pivoted to a limited extent about its longitudinal axis and its transverse axis, so that good contact systems result.
  • the springs also provide the restoring force when the switch is open.
  • the invention has for its object to develop an electromagnetic sound device of the type mentioned, which while maintaining the above-mentioned advantages of the known construction, in which two relatively heavy magnetic cores have to be moved, has a considerably longer mechanical life than the known construction.
  • an electromagnetic switching device according to the preamble of claim 1 is equipped according to the invention with the features of the characterizing part of the claim.
  • the invention achieves a practically friction-free resilient suspension of the two magnetic cores and thus the entire magnet system.
  • the leaf springs are also used as switch-off springs, so that separate switch-off springs are no longer required.
  • the articulated arms can also be fastened to the magnetic cores and the contact bridge support with the aid of leaf springs, as a result of which a bearingless and thus extraordinarily wear-resistant construction is obtained.
  • the contactor shown in FIGS. 1 to 3 can be designed for a nominal voltage of, for example, 660 V and have a multi-pole contact system, of which only one pole is shown.
  • the contactor is built on a central tripod plate, with the magnetic system of the contactor on one side and the contact system of the contactor on the other side of the tripod plate.
  • the magnet system is accommodated in a magnet housing 2, the lower wall of which forms a base plate 3 for mounting the contactor on a base.
  • the stand plate 1 and the magnet housing 2 can be made of plastic or light metal.
  • the contact system is surrounded by an arc shield 4 made of plastic, which is provided with quenching plates 5.
  • the contact system contains two switching points electrically connected in series per pole, each of which is arranged in its associated switching chamber 6, 7 formed in the arc shield. Each switching point has a fixed contact 8 or 9, which is attached to a connection 10 or 11.
  • the fixed contacts are fastened in the closed contact position by a contact bridge support 13 connected to the magnet system.
  • a contact pressure spring (not shown) is arranged in the contact bridge support and acts on the bridge contact 12 via a bracket 14 and a leaf spring 15.
  • the magnet system contains a coil 16 fixedly arranged on the stand plate 1 and a magnetic core system which consists of two identical E-shaped magnetic cores 17 and 18.
  • the magnetic cores move along a straight line perpendicular to the contact movement, towards each other when switching on and away from each other when switching off.
  • Each magnetic core is suspended from the tripod plate with the aid of three elongated leaf springs 19-21 and 22-24.
  • the leaf springs are fixed at one end to the associated magnetic core and at the other end to the tripod plate 1.
  • fastening angles 25, 26 are provided on the one hand on the outer legs of the magnetic cores and, on the other hand, projecting U-shaped brackets 27, 28 which are fastened in the middle of the yoke of their associated magnetic core.
  • the leaf springs are fixed with the aid of screws.
  • the attachment can also be done in other ways, for. B. by pouring or by clamping with spring clips on the mounting pins that are present on the magnetic cores or on the tripod plate.
  • the force exerted by the magnetic cores 17, 18 and their movements are transmitted to the contact bridges 13 via pivoted articulated arms 29, 30.
  • springs which constantly apply to the magnetic cores in the switch-off direction.
  • These springs can be designed in many different ways, for example as compression springs which are clamped directly between spring stops which are attached to the magnetic cores.
  • compression springs which are attached to the bearings of the articulated arms 29, 30 in the contact bridges 13.
  • elongated leaf springs which are directed essentially perpendicular to the direction of movement of the magnetic cores, are fixed at their center to the brackets 27, 28 at the same point at which the leaf springs 19, 22 are fixed, and with their Butt ends against support lugs fixedly arranged in the contactor housing.
  • FIG. 4 schematically shows an embodiment in which the bearing pins 31, 32 of the articulated arms 29, 30 running through the contact bridge support 13 are guided in guide grooves 33 which are present in two guide plates 34 arranged on each side of the articulated arms, which are fixed to the tripod plate 1 are attached.
  • the guide grooves 33 are L-shaped, so that the bearing pins must move perpendicular to the direction of movement of the contacts at the start of a switch-on process. This further improves shock resistance when the contactor is in the shutdown position.
  • shutdown springs 35, 36 are also shown, which in the exemplary embodiment are designed as wire springs that are fixedly mounted on the base plate 3.
  • FIG. 5 shows an embodiment of this type, in which the leaf springs 19-24 also serve as cut-off springs for suspending the magnetic cores 17, 18.
  • the leaf springs are designed to be considerably stronger than in the embodiment according to FIG. 1, and they are clamped at an angle so that they exert a permanent force in the switch-off direction.
  • the springs are attached to the magnetic cores with the aid of spring fastening members 37, 38, in which the springs are fixed with the aid of their own spring force.
  • FIGS. 6 and 7 show how the leaf spring 20 is fastened by means of a spring fastening element 37 in a dovetail groove 39 in the magnetic core 17.
  • the spring fastener 37 which is shown separately in Figures 8-10, is made by stamping and bending sheet metal.
  • the Fastening member 37 has a central part 40 protruding from the magnetic core and two feet 41, 42 directed in the opposite direction, which lie in a plane perpendicular to the central part and lie in the dovetail groove.
  • the feet are provided with hook-shaped end sections 43, 44 which grip around the lateral edges of the magnetic core and fix the leaf spring in the longitudinal direction of the groove.
  • the central part 40 is provided with two embossed (recessed) sections 46, 47 lying on one side of a slot 45, directed in the opposite direction and adapted to the spring 20.
  • the end section of the spring as can be seen from FIG. 11, is provided with a hole 48 which is adapted to a projection 49 embossed on the section 47 of the spring fastening.
  • the spring is fixed to the spring fastener 37 by inserting the end portion of the spring through the slot 45 between the portions 46 and 47 and into position such that the projection 49 of the spring fastener snaps into the hole 48 in the spring 20.
  • the spring fastening member After mounting in the contactor ( Figure 6), the spring fastening member is constantly acted upon by a clockwise torque exerted by the spring, which on the one hand fixes the leaf spring in the dovetail groove and on the other hand holds the spring in its position in the leaf spring.
  • FIG. 12 shows an embodiment with articulated arms fastened without bearings between the magnetic cores and the contact bridge support.
  • the articulated arms are fastened here with the aid of leaf springs 50 and 51.
  • FIGS. 13 to 18 show how the articulated arm 29 and the suspension and switch-off spring 19 are fastened to the magnetic core 17 with the aid of an essentially U-shaped fastening member 52 made of sheet metal.
  • One leg of the fastening member is fastened in a dovetail groove in the yoke of the magnetic core 17.
  • the other leg is provided with two sections 53 and 54, which are embossed in the opposite direction and lie on one side of a transverse slot 55.
  • the section 54 closest to the bottom part of the fastening member has an outwardly directed projection 56 which projects into a hole in the end section of the spring 19, the spring being fixed to the fastening member by its own force (see FIGS. 13, 16 and 17 ).
  • the articulated arm 29 is provided with a foot 57 which is attached to the articulated arm, for example by welding.
  • the foot is rotatably fixed to the bottom part of the fastening member 52 by means of the leaf spring 50.
  • the foot has a slot 58 for the spring and an extruded end portion 59 lying outside the slot with two embossed, upward projections 60 which fit into holes in one end portion of the spring 50.
  • the other end section of the spring is also provided with holes, into which embossed projections 61 on the bottom part of the fastening member 52 protrude (cf. FIGS. 13, 14, 15 and 18).
  • the articulated arm 29 is fastened to the contact bridge support 13 in the same way by means of the leaf spring 51.
  • the fastening springs 50, 51 for the articulated arm 29 and the corresponding springs for the articulated arm 30 must be kept stretched with a certain small straightening force in order to ensure safe functioning. In the embodiment according to FIG. 12, this is achieved with a spring 62 arranged between the arms 29 and 30, which acts on the arms 29 and 30 with a torque directed clockwise or counterclockwise.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Tumbler Switches (AREA)
  • Magnetic Treatment Devices (AREA)

Claims (9)

1. Appareil de commutation électromagnétique, en particulier contacteur, pourvu d'un boîtier et comportant au moins un pont de contact mobile (12) qui est fixé à un support de pont de contact (13) qui est relié, par l'intermédiaire de deux bras articulés (29, 30), à deux noyaux magnétiques (17, 18), de préférence réalisés de façon identique, d'un électroaimant de commutation, et qui sont montés de façon à pouvoir se déplacer, en sens contraire l'un de l'autre, le long d'une droite qui s'étend sensiblement perpendiculairement à la direction du déplacement du support de pont de contact, caractérisé par le fait que les deux noyaux magnétiques (17, 18) sont suspendus au boîtier (1) de l'appareil de commutation à l'aide de ressorts à lam-es (19 - 24) qui sont ancrés par l'une de leurs extrémités au boîtier (1) de l'appareil de commutation et par l'autre extrémité au noyau magnétique (17, 18) associé, la réalisation étant telle que les ressorts à lames s'étendent sensiblement perpendiculairement à la direction du déplacement des noyaux magnétiques (17, 18) et déterminent de ce fait, la trajectoire des noyaux magnétiques.
2. Appareil de commutation selon la revendication 1, caractérisé par le fait que les ressorts à lames (19 - 24) chargent les noyaux magnétiques (17,18) en permanence avec une force de rappel qui agit à l'encontre de la force d'attraction de l'électroaimant de commutation.
3. Appareil de commutation selon l'une des revendications précédentes, caractérisé par le fait que chaque noyau magnétique (17, 18) est suspendu en trois points, à l'aide des ressorts à lames susmentionnés (19 - 24).
4. Appareil de commutation électromagnétique selon l'une des revendications précédentes, caractérisé par le fait que lesdits ressorts à lames (19 - 24) sont ancrés au noyaux magnétiques (17, 18) associés, à l'aide d'éléments de fixation (37, 52), lesquels éléments de fixation sont fixés dans le noyau magnétique à l'aide de gorges en queue d'aronde (39).
5. Appareil de commutation selon la revendication 4, caractérisé par le fait que les extrémités des ressorts à lames (19 - 24), après leur insertion dans les éléments élastiques de fixation (37, 52), y sont maintenues par la force propre du ressort considéré.
6. Appareil de commutation selon la revendication 5, caractérisé par le fait que les éléments de fixation (37, 52) sont réalisés avec une tôle, et possèdent une fente (45, 55) ainsi qu'une section enfoncée (47, 54) et réalisée sur un côté de la fente, section enfoncée dans laquelle est réalisé par matriçage, un appendice de fixation (49, 56) qui s'adapte dans un trou (48) ménagé dans la section d'extrémité du ressort à lame, qui est insérée dans la fente.
7. Appareil de commutation selon l'une des revendications précédentes, caractérisé par le fait que les bras articulés (29, 30) sont montés sur le support de pont de contact (13), à l'aide de tourillons de montage (31, 32) qui sont guidés dans des gorges de guidage (33) d'un élément fixe (34) de l'appareil de commutation, lesdites gorges de guidage étant disposées de telle façon que les tourillons de montage (31, 32) exécutent, au début d'un mouvement de fermeture, un mouvement qui possède une composante qui est perpendiculaire à la direction du déplacement des contacts.
8. Appareil de commutation selon l'une des revendications 1 à 6, caractérisé par le fait que pour relier les bras articulés (29, 30) avec les noyaux magnétiques (17, 18) et/ou avec le support de pont de contact (13), des ressorts à lames supplémentaires (50, 51) sont prévus.
9. Appareil de commutation selon la revendication 8, caractérisé par le fait que chaque bras articulé (29, 30) est attaqué par un ressort supplémentaire (62) chargeant les bras articulés (29, 30) avec un couple qui a pour conséquence un allongement permanent des ressorts supplémentaires (50, 51).
EP84107977A 1983-07-11 1984-07-07 Appareil de commutation électromagnétique Expired EP0131297B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8303929A SE437312B (sv) 1983-07-11 1983-07-11 Elektromagnetiskt manovrerad elkopplare, exempelvis kontaktor
SE8303929 1983-07-11

Publications (3)

Publication Number Publication Date
EP0131297A2 EP0131297A2 (fr) 1985-01-16
EP0131297A3 EP0131297A3 (en) 1985-08-14
EP0131297B1 true EP0131297B1 (fr) 1989-01-04

Family

ID=20351944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107977A Expired EP0131297B1 (fr) 1983-07-11 1984-07-07 Appareil de commutation électromagnétique

Country Status (5)

Country Link
US (1) US4562418A (fr)
EP (1) EP0131297B1 (fr)
JP (1) JPS6074226A (fr)
DE (1) DE3475984D1 (fr)
SE (1) SE437312B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5844457A (en) * 1996-11-25 1998-12-01 Eaton Corporation Electromagnetically operated electric switching apparatus
US20110037543A1 (en) * 2007-10-11 2011-02-17 Dale Walter Lange Electrical switching device
US8130064B2 (en) * 2008-08-01 2012-03-06 Tyco Electronics Corporation Switching device
US8203403B2 (en) * 2009-08-27 2012-06-19 Tyco Electronics Corporation Electrical switching devices having moveable terminals
CN101976636B (zh) * 2010-11-24 2013-01-02 沈阳工业大学 一种接触器触头系统
US8564386B2 (en) 2011-01-18 2013-10-22 Tyco Electronics Corporation Electrical switching device
US8222981B1 (en) 2011-01-18 2012-07-17 Tyco Electronics Corporation Electrical switching device
US8368492B1 (en) * 2012-08-24 2013-02-05 Eaton Corporation Bidirectional direct current electrical switching apparatus
CN103617695B (zh) * 2013-11-12 2015-11-18 国家电网公司 电力架空线路过路弹簧式警示装置
DE102016011341A1 (de) 2016-09-21 2017-03-30 Daimler Ag Hochvoltschaltschützanordnung für ein Kraftfahrzeug und Verfahren zum Überführen einer Hochvoltschaltschützanordnung zwischen einem geöffneten und einem geschlossenen Zustand

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45153C (de) * W. D. SANDWELL in London Dynamo-elektrische oder elektrodynamische Maschine mit einem Feldmagnetensatz und zwei Armaturen
DE655812C (de) * 1938-01-24 Kloeckner Kom Ges F Elektrisches Schuetz
US789457A (en) * 1900-08-23 1905-05-09 Gen Electric Electrically-operated switch for controlling circuits, &c.
US1561263A (en) * 1921-09-23 1925-11-10 Westinghouse Electric & Mfg Co Voltage regulator
US2853577A (en) * 1954-05-19 1958-09-23 Ward Electric Company Electromagnetic switch
AT187967B (de) * 1955-03-16 1956-12-10 Elektro Werkstaetten Benedikt Lagerung des Ankers eines Elektromagneten, insbesonders für elektromagnetisch betätigte Schaltgeräte (Schütze)
CH349324A (de) * 1956-02-18 1960-10-15 Bohuslav Dr Novotny Elektromagnet an elektrischen Schaltgeräten
DE1203359B (de) * 1958-06-06 1965-10-21 Hellmuth Kuhnke U-foermiger Schaltmagnet mit einem parallel zu seinen Polflaechen translatorisch bewegten Anker
FR1335804A (fr) * 1961-11-22 1963-08-23 Pirelli Circuit magnétique pour télérupteurs
DE1914697A1 (de) * 1968-04-02 1969-11-13 Dunlop Co Ltd Rohrleitung mit Rohrverbindung
FR1585198A (fr) * 1968-05-31 1970-01-09
US3708769A (en) * 1970-10-22 1973-01-02 Ghisalba Spa Electromagnetic contactor
DE3211685C2 (de) * 1982-03-30 1984-02-09 Mannesmann AG, 4000 Düsseldorf Schütze zur Steuerung von Elektromotoren

Also Published As

Publication number Publication date
US4562418A (en) 1985-12-31
EP0131297A2 (fr) 1985-01-16
DE3475984D1 (en) 1989-02-09
SE8303929D0 (sv) 1983-07-11
JPS6074226A (ja) 1985-04-26
SE437312B (sv) 1985-02-18
SE8303929L (sv) 1985-01-12
EP0131297A3 (en) 1985-08-14

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