EP0356819A2 - Switch apparatus, in particular a contactor - Google Patents

Switch apparatus, in particular a contactor Download PDF

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Publication number
EP0356819A2
EP0356819A2 EP89115184A EP89115184A EP0356819A2 EP 0356819 A2 EP0356819 A2 EP 0356819A2 EP 89115184 A EP89115184 A EP 89115184A EP 89115184 A EP89115184 A EP 89115184A EP 0356819 A2 EP0356819 A2 EP 0356819A2
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EP
European Patent Office
Prior art keywords
stops
contact
normally
contact parts
switching device
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
EP89115184A
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German (de)
French (fr)
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EP0356819B1 (en
EP0356819A3 (en
Inventor
Kurt Held
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
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Siemens AG
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Publication of EP0356819A2 publication Critical patent/EP0356819A2/en
Publication of EP0356819A3 publication Critical patent/EP0356819A3/en
Application granted granted Critical
Publication of EP0356819B1 publication Critical patent/EP0356819B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts

Definitions

  • the invention relates to an electromagnetic switching device with a magnet system with yoke and armature, the armature of which is connected to a displaceably guided contact carrier in the housing of the switching device, which has side-by-side switching contact parts which form make or break contacts with fixed contact parts and in the support or driving stops for the switch contact parts are provided.
  • Such a switching device is known, for example, from DE-AS 2 027 136.
  • the so-called free path is of great interest, ie the path that has to be followed from lifting the opener to hanging up the closer.
  • This path is also dependent on the tolerances of the guidance of the contact carrier in the housing of the switching device, in particular if the break contacts are arranged on the corners of the contact carrier that are furthest away from the drive magnet.
  • the invention has for its object to provide a switching device in which the free travel of such tolerances can be determined independently.
  • stops facing the housing wall are arranged to lead in the direction of movement in relation to the middle stops. If the stops are staggered leading to the direction of actuation, there is also a better adaptation of the traction force curve to the magnet demand curve, so that the magnet system can be designed to be weaker.
  • the formation of the stops can be achieved relatively easily if the stops face the window-shaped opening are in the contact carrier, in which contact bridges are arranged.
  • the fixed magnetic part 2 is designed as a yoke and surrounded by the excitation coil 3.
  • the armature 4 of the switching device is connected to the contact carrier, in the present case a contact bridge carrier 5, which has windows 6 in which the contact bridges 7 are held with the contact pressure springs 8.
  • the upper contact bridges 7 form normally closed contacts with the fixed contact parts, not shown, and the contact bridges 7 provided in the lower row with further fixed contact parts make contacts.
  • the back pressure force is increased by the amount of the contact pressure force of the break contacts because they no longer act against the force of the back pressure spring (dash-dot line 21). If, in order to achieve a larger free path, the offset of all windows over the end faces 9 were arranged in advance, a power requirement corresponding to the distance 14 would be required. Accordingly, a traction force curve 16 would be required - indicated by dashed lines - in order to lie above the diagram point corresponding to the route 14. The offset leading arrangement of the end faces 9 results in the extended course with the lines 17, 18 and 19.
  • the force 17 is present after the opening of the two outer current paths I and V, the force 18 after the opening of the current paths II and IV, the force 19 when the opener of the current path III lifts off.
  • a traction force curve 20 can be selected which runs substantially lower than the traction force curve 16, so that the magnet system can be designed to be weaker.
  • the power requirement indicated in the diagram according to FIG. 2 by the line 15 corresponds to the requirement when the make contacts close.
  • the arrangement of the stops according to the invention thus makes it possible to compensate for the loss of free travel through the different play of the contact carrier with the same traction curve without any design effort.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Tumbler Switches (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Relay Circuits (AREA)
  • Control Of Electric Motors In General (AREA)
  • Railway Tracks (AREA)
  • Push-Button Switches (AREA)
  • Contacts (AREA)

Abstract

The invention relates to an electromagnetic switch apparatus having a magnet system with yoke and armature, the armature of which has switch contact parts lying mutually adjacent transverse to the direction of actuation with a contact support guided in the casing of the switch apparatus, which switch contact parts form normally-open or normally-closed contacts with stationary contact parts, and in which support or entrainment stops are provided for the switch contact parts. <??>The contact supports are guided in the housing with play, so that tilting is possible. With respect to this tilting motion, the free path, that is to say the path which is necessary from the lifting of all normally-closed contacts to the resting of all normally-open contacts, must be set to the normally-closed contact lifting last. <??>In order to keep this free path relatively large, the stops facing the casing walls are located in advance of the middle stops in the direction of motion, so that the free path lost by the tilting is thereby gained again. In this way, the force required can be kept lower in comparison to the conventional design, since it has a favourable effect on the traction curve. <IMAGE>

Description

Die Erfindung bezieht sich auf ein elektromagnetisches Schalt­gerät mit einem Magnetsystem mit Joch und Anker, dessen Anker mit einem im Gehäuse des Schaltgerätes verschiebbar geführten Kontaktträger verbunden ist, der quer zur Betätigungsrichtung nebeneinanderliegende Schaltkontaktteile aufweist, die mit feststehenden Kontaktteilen Schließer- bzw. Öffnerkontakte bilden und in dem Abstützungs bzw. Mitnahmeanschläge für die Schaltkontaktteile vorgesehen sind.The invention relates to an electromagnetic switching device with a magnet system with yoke and armature, the armature of which is connected to a displaceably guided contact carrier in the housing of the switching device, which has side-by-side switching contact parts which form make or break contacts with fixed contact parts and in the support or driving stops for the switch contact parts are provided.

Ein derartiges Schaltgerät ist beispielsweise aus der DE-AS 2 027 136 als bekannt zu entnehmen. Bei Schaltgeräten der obengenannten Art ist der sogenannte Freiweg von großem In­teresse, d.h. derjenige Weg, der durchlaufen werden muß vom Abheben des Öffners bis zum Auflegen des Schließers. Dieser Weg ist auch von den Toleranzen der Führung des Kontaktträ­gers im Gehäuse des Schaltgerätes abhängig, insbesondere dann, wenn die Öffnerkontakte an den vom Antriebsmagneten an weitest entfernten Ecken des Kontaktträgers angeordnet sind. Hier ergibt sich ein relativ großer Freiwegverlust durch das unvermeidliche Spiel des Kontaktträgers in der Schaltkammer, das bei der Bemessung des Freiweges Berücksichtigung finden muß. Der Erfindung liegt die Aufgabe zugrunde, ein Schaltgerät zu schaffen, bei dem der Freiweg von derartigen Toleranzen un­abhängig festlegbar ist. Dies wird auf einfache Weise dadurch erreicht, daß die der Gehäusewandung zugewandten Anschläge gegenüber den mittleren Anschlägen in Bewegungsrichtung vorei­lend angeordnet sind. Werden die Anschläge quer zur Betätigungs­richtung gestaffelt voreilend angeordnet, so ergibt sich auch eine bessere Anpassung der Zugkraftkurve an die Magnetbedarfs­kurve, so daß das Magnetsystem schwächer ausgelegt werden kann. Die Ausbildung der Anschläge läßt sich relativ einfach errei­chen, wenn die Anschläge die Stirnflächen fensterförmiger Öff­ nungen im Kontaktträger sind, in denen Kontaktbrücken angeord­net sind. Hinsichtlich der Anpassung der Zugkraftkurve des Magneten an die Kraftbedarfskurve ist es weiterhin von Vorteil, wenn zwei Reihen fensterförmiger Öffnungen in Einschaltbewe­gungsrichtung hintereinander liegen und Öffner- oder Schlies­serbrücken beinhalten, wobei die Stirnflächen für die Öffner in der unteren und oberen Reihe nach außen hin voreilend ange­ordnet sind, während die Stirnflächen für die Schließerbrücken sich in einer Ebene befinden.Such a switching device is known, for example, from DE-AS 2 027 136. In switchgear of the type mentioned above, the so-called free path is of great interest, ie the path that has to be followed from lifting the opener to hanging up the closer. This path is also dependent on the tolerances of the guidance of the contact carrier in the housing of the switching device, in particular if the break contacts are arranged on the corners of the contact carrier that are furthest away from the drive magnet. Here there is a relatively large loss of free path due to the inevitable play of the contact carrier in the switching chamber, which must be taken into account when dimensioning the free path. The invention has for its object to provide a switching device in which the free travel of such tolerances can be determined independently. This is achieved in a simple manner in that the stops facing the housing wall are arranged to lead in the direction of movement in relation to the middle stops. If the stops are staggered leading to the direction of actuation, there is also a better adaptation of the traction force curve to the magnet demand curve, so that the magnet system can be designed to be weaker. The formation of the stops can be achieved relatively easily if the stops face the window-shaped opening are in the contact carrier, in which contact bridges are arranged. With regard to the adaptation of the traction force curve of the magnet to the force demand curve, it is also advantageous if two rows of window-shaped openings lie one behind the other in the direction of switch-on movement and contain opening or closing bridges, the end faces for the opening contacts in the lower and upper rows being arranged leading outward , while the end faces for the closer bridges are on one level.

Anhand der Zeichnung wird ein Ausführungsbeispiel gemäß der Erfindung beschrieben.An exemplary embodiment according to the invention is described with reference to the drawing.

Es zeigen:

  • FIG 1 den prinzipiellen Aufbau des elektromagnetischen Schalt­gerätes ohne feststehende Kontakte, zum Teil im Schnitt, und
  • FIG 2 den Verlauf des Kraftbedarfes zur Zugkraftkurve des Magneten.
Show it:
  • 1 shows the basic structure of the electromagnetic switching device without fixed contacts, partly in section, and
  • 2 shows the course of the power requirement for the traction force curve of the magnet.

In dem Gehäuse 1 des Schaltgerätes ist der feststehende Mag­netteil 2 als Joch ausgebildet und von der Erregerspule 3 um­geben. Der Anker 4 des Schaltgerätes ist mit dem Kontaktträ­ger, im vorliegenden Fall ein Kontaktbrückenträger 5, verbun­den, der Fenster 6 aufweist, in denen die Kontaktbrücken 7 mit den Kontaktdruckfedern 8 gehalten sind. Die oberen Kontaktbrük­ken 7 bilden mit den nicht näher dargestellten Festkontakttei­len Öffnerkontakte und die in der unteren Reihe vorgesehenen Kontaktbrücken 7 mit weiteren Festkontaktteilen Schließerkon­takte. Wie die FIG 1 zeigt, sind die Stirnflächen 9 der fen­sterförmigen Öffnungen 6 zum Rand des Gehäuses gegenüber den mittleren Stirnflächen in Bewegungsrichtung voreilend angeord­net, d.h. im Normalfall bei nicht kippendem Kontaktträger 5 werden die äußeren Kontaktbrücken 7 von "AUS" nach "EIN" vor den innenliegenden Kontaktbrücken von den Festkontaktteilen abgehoben, nämlich durch Anlage an den Stirnflächen 9. Der Versatz der Stirnflächen 9 der dem mittleren Fenster benach­barten Fenstern ist mit 10 bezeichnet und der der äußeren Fenster mit 11. In FIG 2 ist der Kraftbedarf 12 in Newton (N) in Abhängigkeit vom Luftspalt, d.h. dem Weg (S) des Ankers angegeben. Die Strecke 13 entspricht der Kraft in Stellung "AUS". Nach einem gewissen Hub beim Öffnen der Öffnerkontakte wird die Rückdruckkraft um den Betrag der Kontaktdruckkraft der Öffnerkontakte erhöht, weil diese nun nicht mehr gegen die Kraft der Rückdruckfeder (Strich-Punkt-Linie 21) wirken. Würde, um einen größeren Freiweg zu erzielen, der Versatz aller Fenster über die Stirnflächen 9 voreilend angeordnet, wäre ein Kraft­bedarf entsprechend der Strecke 14 erforderlich. Dementsprechend wäre eine Zugkraftkurve 16 erforderlich - gestrichelt angedeu­tet -, um über dem Diagrammpunkt entsprechend der Strecke 14 zu liegen. Durch das versetzte voreilende Anordnen der Stirnflächen 9 ergibt sich der ausgezogene Verlauf mit den Strecken 17, 18 und 19. Die Kraft 17 ist nach dem Öffnen der beiden äußeren Strombahnen I und V vorhanden, die Kraft 18 nach zusätzlichem Öffnen der Öffner der Strombahnen II und IV, die Kraft 19, wenn der Öffner der Strombahn III abhebt. Hierdurch kann eine Zugkraftkurve 20 gewählt werden, die wesentlich niedriger als die Zugkraftkurve 16 verläuft, so daß das Magnetsystem schwächer ausgelegt werden kann. Der im Diagramm nach FIG 2 mit der Strek­ke 15 angedeutete Kraftbedarf entspricht dem Bedarf beim Schließen der Schließerkontakte. Durch die erfindungsgemäße Anordnung der Anschläge ist somit ohne konstruktiven Aufwand ein Ausgleich des Freiwegverlustes durch das unterschiedliche Spiel des Kontaktträgers bei gleicher Zugkraftkurve möglich.In the housing 1 of the switching device, the fixed magnetic part 2 is designed as a yoke and surrounded by the excitation coil 3. The armature 4 of the switching device is connected to the contact carrier, in the present case a contact bridge carrier 5, which has windows 6 in which the contact bridges 7 are held with the contact pressure springs 8. The upper contact bridges 7 form normally closed contacts with the fixed contact parts, not shown, and the contact bridges 7 provided in the lower row with further fixed contact parts make contacts. 1 shows the end faces 9 of the window-shaped openings 6 leading to the edge of the housing in relation to the middle end faces in the direction of movement, ie in the normal case when the contact carrier 5 does not tilt, the outer contact bridges 7 are from "OFF" to "ON" before the internal contact bridges from the fixed contact parts lifted, namely by abutment on the end faces 9. The offset of the end faces 9 of the windows adjacent to the middle window is denoted by 10 and that of the outer windows by 11. In FIG. 2 the force requirement 12 in Newtons (N) is dependent on the air gap ie the path (S) of the anchor specified. The distance 13 corresponds to the force in the "OFF" position. After a certain stroke when opening the break contacts, the back pressure force is increased by the amount of the contact pressure force of the break contacts because they no longer act against the force of the back pressure spring (dash-dot line 21). If, in order to achieve a larger free path, the offset of all windows over the end faces 9 were arranged in advance, a power requirement corresponding to the distance 14 would be required. Accordingly, a traction force curve 16 would be required - indicated by dashed lines - in order to lie above the diagram point corresponding to the route 14. The offset leading arrangement of the end faces 9 results in the extended course with the lines 17, 18 and 19. The force 17 is present after the opening of the two outer current paths I and V, the force 18 after the opening of the current paths II and IV, the force 19 when the opener of the current path III lifts off. In this way, a traction force curve 20 can be selected which runs substantially lower than the traction force curve 16, so that the magnet system can be designed to be weaker. The power requirement indicated in the diagram according to FIG. 2 by the line 15 corresponds to the requirement when the make contacts close. The arrangement of the stops according to the invention thus makes it possible to compensate for the loss of free travel through the different play of the contact carrier with the same traction curve without any design effort.

Claims (4)

1. Elektromagnetisches Schaltgerät mit einem Magnetsystem mit Joch und Anker, dessen Anker mit einem im Gehäuse des Schalt­gerätes verschiebbar geführten Kontaktträger verbunden ist, der quer zur Betätigungsrichtung nebeneinanderliegende Schalt­kontaktteile aufweist, die mit feststehenden Kontaktteilen Schließer- bzw. Öffnerkontakte bilden und in dem Abstützungs- bzw. Mitnahmeanschläge für die Schaltkontaktteile vorgesehen sind, dadurch gekennzeichnet, daß
die der Gehäusewandung (1) zugewandten Anschläge (9) gegenüber den mittleren Anschlägen (9) in Bewegungsrichtung voreilend angeordnet sind.1.Electromagnetic switching device with a magnet system with yoke and armature, the armature of which is connected to a contact carrier which is displaceably guided in the housing of the switching device and which has switching contact parts lying next to one another transversely to the actuating direction, which form make or break contacts with fixed contact parts and in which support or Driving stops are provided for the switch contact parts, characterized in that
the stops (9) facing the housing wall (1) are arranged to lead in the direction of movement in relation to the middle stops (9). 2. Schaltgerät nach Anspruch 1, dadurch gekenn­zeichnet, daß die Anschläge (9) quer zur Betäti­gungsrichtung gestaffelt voreilend angeordnet sind.2. Switching device according to claim 1, characterized in that the stops (9) are staggered leading across the direction of actuation. 3. Schaltgerät nach Anspruch 1 oder 2, dadurch ge­kennzeichnet, daß die Anschläge die Stirnflächen (9) fensterförmiger Öffnungen (6) im Kontaktträger (5) sind, in denen Kontaktbrücken (7) angeordnet sind.3. Switching device according to claim 1 or 2, characterized in that the stops are the end faces (9) of window-shaped openings (6) in the contact carrier (5), in which contact bridges (7) are arranged. 4. Schaltgerät nach Anspruch 3, dadurch gekenn­zeichnet, daß zwei Reihen fensterförmiger Öffnungen (6) in Einschaltbewegungsrichtung hintereinander liegen die Öffner- oder Schließerbrücken (7) beinhalten, wobei die Stirn­flächen für die Öffner in der unteren und oberen Reihe nach außen hin voreilend angeordnet sind, während die Stirnflächen für die Schließerbrücken sich in einer Ebene befinden.4. Switching device according to claim 3, characterized in that two rows of window-shaped openings (6) one behind the other in the closing movement direction include the opening or closing bridges (7), the end faces for the openers in the lower and upper rows being arranged leading outwards , while the end faces for the closer bridges are on one level.
EP89115184A 1988-08-29 1989-08-17 Switch apparatus, in particular a contactor Expired - Lifetime EP0356819B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8810908U 1988-08-29
DE8810908U DE8810908U1 (en) 1988-08-29 1988-08-29 Electromagnetic switching device, in particular contactor

Publications (3)

Publication Number Publication Date
EP0356819A2 true EP0356819A2 (en) 1990-03-07
EP0356819A3 EP0356819A3 (en) 1991-11-06
EP0356819B1 EP0356819B1 (en) 1995-01-18

Family

ID=6827361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115184A Expired - Lifetime EP0356819B1 (en) 1988-08-29 1989-08-17 Switch apparatus, in particular a contactor

Country Status (5)

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US (1) US4987397A (en)
EP (1) EP0356819B1 (en)
JP (1) JP2516991Y2 (en)
AT (1) ATE117460T1 (en)
DE (2) DE8810908U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8508321B2 (en) * 2010-08-17 2013-08-13 Song Chuan Precision Co., Ltd. Relay with multiple coils
US8314668B1 (en) * 2011-08-19 2012-11-20 General Electric Company Meter disconnect relay having silver refractory materials contacts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109905A (en) * 1960-09-08 1963-11-05 Furaas Electric Company Magnetic contactor
DE1301393B (en) * 1965-04-24 1969-08-21 Starkstrom Schaltgeraetefabrik Contact bridge arrangement for electrical switchgear equipped with openers and closers
DE1490042B1 (en) * 1964-08-18 1971-03-04 Metzenauer & Jung Gmbh Contactor with switch bridge contacts that can be changed either as opener or closer
DE2027136A1 (en) * 1970-06-03 1972-04-20 Siemens Ag Electromagnetic switching device
FR2519187A1 (en) * 1981-12-30 1983-07-01 Telemecanique Electrique ELECTROMAGNETIC SWITCHING APPARATUS HAVING DIFFERENT CONFIGURATIONS OF OPEN OR CLOSED SWITCH

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166895B (en) * 1961-05-15 1964-04-02 Licentia Gmbh Schuetz as a wiper contactor
DE1239752B (en) * 1964-09-12 1967-05-03 Continental Elektro Ind Ag Detachable connection of a device unit
DE1690427A1 (en) * 1967-08-07 1971-07-15 Schaltelektronik Veb K Auxiliary switch for electromagnetic contactors
US3872952A (en) * 1973-10-09 1975-03-25 Joseph L Poggie Anti-skid apparatus
DE2948959C2 (en) * 1979-12-05 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Electromagnetic switching device
DE3105117C2 (en) * 1981-02-12 1985-10-17 Siemens AG, 1000 Berlin und 8000 München Electromagnetic switching device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109905A (en) * 1960-09-08 1963-11-05 Furaas Electric Company Magnetic contactor
DE1490042B1 (en) * 1964-08-18 1971-03-04 Metzenauer & Jung Gmbh Contactor with switch bridge contacts that can be changed either as opener or closer
DE1301393B (en) * 1965-04-24 1969-08-21 Starkstrom Schaltgeraetefabrik Contact bridge arrangement for electrical switchgear equipped with openers and closers
DE2027136A1 (en) * 1970-06-03 1972-04-20 Siemens Ag Electromagnetic switching device
FR2519187A1 (en) * 1981-12-30 1983-07-01 Telemecanique Electrique ELECTROMAGNETIC SWITCHING APPARATUS HAVING DIFFERENT CONFIGURATIONS OF OPEN OR CLOSED SWITCH

Also Published As

Publication number Publication date
EP0356819B1 (en) 1995-01-18
DE58908904D1 (en) 1995-03-02
JP2516991Y2 (en) 1996-11-13
EP0356819A3 (en) 1991-11-06
US4987397A (en) 1991-01-22
JPH0244240U (en) 1990-03-27
DE8810908U1 (en) 1988-10-13
ATE117460T1 (en) 1995-02-15

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