EP0885448B1 - Electromagnetic switching device with restricted guidance - Google Patents

Electromagnetic switching device with restricted guidance Download PDF

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Publication number
EP0885448B1
EP0885448B1 EP97906135A EP97906135A EP0885448B1 EP 0885448 B1 EP0885448 B1 EP 0885448B1 EP 97906135 A EP97906135 A EP 97906135A EP 97906135 A EP97906135 A EP 97906135A EP 0885448 B1 EP0885448 B1 EP 0885448B1
Authority
EP
European Patent Office
Prior art keywords
armature
switching device
electromagnetic switching
contact support
transmission lever
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
EP97906135A
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German (de)
French (fr)
Other versions
EP0885448A1 (en
Inventor
Klaus Dieter NÜRENBERG
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
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Filing date
Publication date
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Application filed by Moeller GmbH filed Critical Moeller GmbH
Publication of EP0885448A1 publication Critical patent/EP0885448A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/645—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection
    • H01H50/646—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection intermediate part being a blade spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding

Definitions

  • the invention relates to an electromagnetic switching device Forced operation, in which the normally open contacts at a fixed Do not touch the break contact.
  • Such an electromagnetic known from DE 35 40 460 A1 Switching device contains an armature comprising Magnet system, a movable contact carrier in which with Movable contacts forming fixed contacts NC and NO contacts Contact parts are held and one by spring force effected rest position, and an additional elastic Connection between anchor and contact carrier in the form of a against the contact carrier and via a bracket against the anchor supporting spring, which ensures that when welded NC contact a further movement of the armature without actuation the NO contacts are possible (forced operation).
  • a Electromagnetic switching device according to EP 358 050 B1 is such further developed that the welded NC contact additionally elastic against the switchgear housing supporting yoke of the magnet system until the closing of the Magnet system can accommodate.
  • the disadvantage of the stand The technique is that to achieve positive control additional elastic parts are required.
  • the state of the Technology is not to be found, like the positive guidance in electromagnetic switching devices to be realized at which anchor and contact carrier are arranged in parallel planes and their directions of movement are not one after the other, but run parallel or anti-parallel, as in Small shooters are often the case, see for example DE 31 46 780 C2.
  • the object of the invention is therefore, the positive control without additional components and in the case of parallel arrangement of anchor and contact carrier.
  • the support of the Transfer lever against the switchgear housing cheap the transmission ratio of the forces to be transmitted, especially when the transmission lever with a free End coupled with the anchor, free with the other End against the housing part receiving the contact carrier supports and between the two ends with the contact carrier is coupled.
  • the electromagnetic switching device 2 is shown in FIGS. 1 and 2 surrounded by a switchgear housing 4.
  • a magnet system is arranged as a contact drive, that of a fixed magnetic part 6 and one movable anchor 8 is made.
  • linear movement of the armature 8 in the direction on the fixed magnetic part 6 is from a transmission lever 10 on a contact bridge movable parallel to the armature 8 12 transferred.
  • On the contact carrier 12 are not shown movable contact parts held with also not shown, attached to the switchgear housing 4 Form fixed contacts normally closed or normally open contacts. In 1, the break contacts are closed and the normally open contacts opened, with the armature 8 and / or the contact carrier 12, not shown in detail, act returning spring forces.
  • the transmission lever 10 is with his a free end 14 coupled to the armature 8. It supports itself with its other free end 16 against a support point 18th from that on the housing part of the switchgear housing 4 is located, in which the contact carrier 12 is mounted. Between its two ends 14 and 16 is the transmission lever coupled to the contact carrier 12 so that when de-energized or excitation of the magnet system with the movement of the armature 8 a favorable power transmission ratio in the corresponding Parallel movement of the contact carrier in the off position (Fig. 1) or in the on position (Fig. 2).
  • Fig. 3 the case is shown that at least one break contact is welded or the contact carrier 12 by a mechanical lock, not shown, is blocked.
  • a counterforce acts when the magnet system is excited F on the contact carrier 12.
  • the transmission lever 10 is advantageously more resilient Lever (snap lever) trained when exceeded gives way to a critical load by leaps and bounds.
  • the magnet system is replaced by magnetic ones Contact of the armature 8 with the fixed magnetic part 6 closed and on the other hand the counterforce F on the contact carrier 12 limited. This will both overload the Magnetic circuit as well as the closing of the normally open contacts effectively prevents, i.e. the forced control of the electromagnetic Switching device 2 is guaranteed in any case.

Abstract

PCT No. PCT/EP97/00956 Sec. 371 Date Sep. 4, 1998 Sec. 102(e) Date Sep. 4, 1998 PCT Filed Feb. 27, 1997 PCT Pub. No. WO97/33289 PCT Pub. Date Sep. 12, 1997An electromagnetic switching device (2) with restricted guidance, in which the closure contacts do not come into contact when the break contact is welded or fixed. An elastically resilient transmission lever (10) is provided to establish the effective connection between the armature (8) and the contact support (12) extending at a distance from and parallel to the armature.

Description

Die Erfindung betrifft ein elektromagnetisches Schaltgerät mit Zwangsführung, bei dem sich die Schließerkontakte bei festgelegtem Öffnerkontakt nicht berühren.The invention relates to an electromagnetic switching device Forced operation, in which the normally open contacts at a fixed Do not touch the break contact.

Stand der TechnikState of the art

Ein derartiges, aus der DE 35 40 460 A1 bekanntes elektromagnetisches Schaltgerät gemäß Oberbegriff von Patentanspruch 1 enthält ein einen Anker umfassendes Magnetsystem, einen beweglichen Kontaktträger, in dem mit Festkontakten Öffner- und Schließerkontakte bildende bewegliche Kontaktteile gehalten sind und der eine durch Federkraft bewirkte Ruhelage einnimmt, und eine zusätzliche elastische Verbindung zwischen Anker und Kontaktträger in Form einer sich gegen den Kontaktträger und über einen Bügel gegen den Anker abstützenden Feder, wodurch erreicht wird, daß bei verschweißtem Öffnerkontakt eine Weiterbewegung des Ankers ohne Betätigung der Schließerkontakte möglich ist (Zwangsführung). Ein elektromagnetisches Schaltgerät nach EP 358 050 B1 ist derart weitergebildet, daß bei verschweißtem Öffnerkontakt das zusätzlich elastisch gegen das Schaltgerätegehäuse sich abstützende Joch des Magnetsystems bis zum Schließen des Magnetsystems entgegenkommen kann. Der Nachteil des Standes der Technik besteht darin, daß zur Erzielung der Zwangsführung zusätzliche elastische Teile erforderlich sind. Dem Stand der Technik ist nicht zu entnehmen, wie die Zwangsführung bei elektromagnetischen Schaltgeräten realisiert werden soll, bei denen Anker und Kontaktträger in parallelen Ebenen angeordnet sind und deren Bewegungsrichtungen damit nicht hintereinander, sondern parallel oder antiparallel verlaufen, wie dies bei Kleinschützen häufig der Fall ist, siehe beispielsweise DE 31 46 780 C2.Such an electromagnetic known from DE 35 40 460 A1 Switching device according to the preamble of claim 1 contains an armature comprising Magnet system, a movable contact carrier in which with Movable contacts forming fixed contacts NC and NO contacts Contact parts are held and one by spring force effected rest position, and an additional elastic Connection between anchor and contact carrier in the form of a against the contact carrier and via a bracket against the anchor supporting spring, which ensures that when welded NC contact a further movement of the armature without actuation the NO contacts are possible (forced operation). A Electromagnetic switching device according to EP 358 050 B1 is such further developed that the welded NC contact additionally elastic against the switchgear housing supporting yoke of the magnet system until the closing of the Magnet system can accommodate. The disadvantage of the stand The technique is that to achieve positive control additional elastic parts are required. The state of the Technology is not to be found, like the positive guidance in electromagnetic switching devices to be realized at which anchor and contact carrier are arranged in parallel planes and their directions of movement are not one after the other, but run parallel or anti-parallel, as in Small shooters are often the case, see for example DE 31 46 780 C2.

Darstellung der ErfindungPresentation of the invention

Aufgabe der Erfindung ist es daher, die Zwangsführung ohne zusätzliche Bauteile und für den Fall der parallelen Anordnung von Anker und Kontaktträger zu erreichen.The object of the invention is therefore, the positive control without additional components and in the case of parallel arrangement of anchor and contact carrier.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Bewegung von Anker und Kontaktträger parallel beabstandet verlaufen und daß ein elastisch nachgiebiger Übertragungshebel vorgesehen ist, der die Wirkverbindung zwischen Anker und Kontaktträger herstellt. Dadurch wird ohne zusätzliche Bauteile erreicht, daß bei Festlegung von Öffnerkontakten infolge Verschweißung oder infolge einer mechanischen Verriegelung eine Weiterbewegung des Ankers ohne Betätigung eines Schließerkontaktes gewährleistet ist.This object is achieved in that the Movement of armature and contact carrier parallel spaced run and that an elastically resilient transmission lever is provided, the operative connection between the anchor and Produces contact carrier. This means no additional components achieved that when establishing NC contacts as a result Welding or due to mechanical locking a further movement of the armature without actuation of a make contact is guaranteed.

In vorteilhafter Weiterbildung wirkt sich die Abstützung des Übertragungshebels gegen das Schaltgerätegehäuse günstig auf das Übertragungsverhältnis der zu übertragenden Kräfte aus, insbesondere dann, wenn der Übertragungshebel mit einem freien Ende mit dem Anker gekoppelt ist, sich mit dem anderen freien Ende gegen den den Kontaktträger aufnehmenden Gehäuseteil abstützt und zwischen beiden Enden mit dem Kontaktträger gekoppelt ist.In an advantageous development, the support of the Transfer lever against the switchgear housing cheap the transmission ratio of the forces to be transmitted, especially when the transmission lever with a free End coupled with the anchor, free with the other End against the housing part receiving the contact carrier supports and between the two ends with the contact carrier is coupled.

Bei einer weiteren vorteilhaften Weiterbildung der Erfindung gewährleistet die Verwendung eines Übertragungshebels mit einer maximalen Übertragungskraft, insbesondere durch eine sprunghafte Nachgiebigkeit, eine sichere Schließung des Magnetsystems, obwohl der Kontaktträger infolge eines festgelegten Öffnerkontaktes nicht mehr weiterbewegt wird. Derartige sprunghaft nachgiebige Übertragungselemente sind in anderem Zusammenhang als Schnappelemente an sich bekannt, beispielsweise nach DE 39 27 219 A1.In a further advantageous development of the invention ensures the use of a transmission lever with a maximum transmission force, in particular by a erratic compliance, a safe closure of the Magnet system, although the contact carrier as a result of a fixed Normally closed contact is no longer moved. Such abruptly compliant transmission elements are in other Context known as snap elements, for example according to DE 39 27 219 A1.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung soll nachstehend an einem Ausführungsbeispiel, aus dem weitere Einzelheiten und Vorteile zu ersehen sind, näher erläutert werden. In der zugehörigen Zeichnung zeigt

Figur 1:
ein erfindungsgemäßes elektromagnetisches Schaltgerät in schematischer Darstellung in der Aus-Stellung;
Figur 2:
desgleichen in der Ein-Stellung und
Figur 3:
desgleichen bei blockierter Ein-Stellung.
The invention will be explained in more detail below using an exemplary embodiment from which further details and advantages can be seen. In the accompanying drawing shows
Figure 1:
an inventive electromagnetic switching device in a schematic representation in the off position;
Figure 2:
likewise in the on position and
Figure 3:
likewise when the on position is blocked.

Bester Weg zur Ausführung der ErfindungBest way to carry out the invention

In Fig. 1 und Fig. 2 ist das elektromagnetische Schaltgerät 2 von einem Schaltgerätegehäuse 4 umgeben. Innerhalb des Schaltgerätegehäuses 4 ist als Kontaktantrieb ein Magnetsystem angeordnet, das aus einem feststehenden Magnetteil 6 und einem beweglichen Anker 8 besteht. Die bei Erregung des Magnetsystems hervorgerufene Linearbewegung des Ankers 8 in Richtung auf das feststehende Magnetteil 6 wird von einem Übertragungshebel 10 auf eine parallel zum Anker 8 bewegliche Kontaktbrücke 12 übertragen. Auf dem Kontaktträger 12 sind nicht dargestellte bewegliche Kontaktteile gehalten, die mit ebenfalls nicht dargestellten, am Schaltgerätegehäuse 4 befestigten Festkontakten Öffner- bzw. Schließerkontakte bilden. In der Aus-Stellung nach Fig. 1 sind die Öffnerkontakte geschlossen und die Schließerkontakte geöffnet, wobei auf den Anker 8 und/oder den Kontaktträger 12 im einzelnen nicht dargestellte, rückholende Federkräfte einwirken. In der Ein-Stellung nach Fig. 2 sind die Öffnerkontakte geöffnet und die Schließerkontakte geschlossen. Der Übertragungshebel 10 ist mit seinem einem freien Ende 14 mit dem Anker 8 gekoppelt. Er stützt sich mit seinem anderen freien Ende 16 gegen eine Abstützstelle 18 ab, die sich an demjenigen Gehäuseteil des Schaltgerätegehäuses 4 befindet, in dem der Kontaktträger 12 gelagert ist. Zwischen seinen beiden Enden 14 und 16 ist der Übertragungshebel mit dem Kontaktträger 12 gekoppelt, so daß bei Entregung bzw. Erregung des Magnetsystems die Bewegung des Ankers 8 mit einem günstigen Kraftübertragungsverhältnis in die entsprechende Parallelbewegung des Kontaktträgers in die Aus-Stellung (Fig. 1) bzw. in die Ein-Stellung (Fig. 2) erfolgt.The electromagnetic switching device 2 is shown in FIGS. 1 and 2 surrounded by a switchgear housing 4. Inside the switchgear housing 4 a magnet system is arranged as a contact drive, that of a fixed magnetic part 6 and one movable anchor 8 is made. When the magnet system is excited caused linear movement of the armature 8 in the direction on the fixed magnetic part 6 is from a transmission lever 10 on a contact bridge movable parallel to the armature 8 12 transferred. On the contact carrier 12 are not shown movable contact parts held with also not shown, attached to the switchgear housing 4 Form fixed contacts normally closed or normally open contacts. In 1, the break contacts are closed and the normally open contacts opened, with the armature 8 and / or the contact carrier 12, not shown in detail, act returning spring forces. In the on position after Fig. 2, the break contacts are open and the make contacts closed. The transmission lever 10 is with his a free end 14 coupled to the armature 8. It supports itself with its other free end 16 against a support point 18th from that on the housing part of the switchgear housing 4 is located, in which the contact carrier 12 is mounted. Between its two ends 14 and 16 is the transmission lever coupled to the contact carrier 12 so that when de-energized or excitation of the magnet system with the movement of the armature 8 a favorable power transmission ratio in the corresponding Parallel movement of the contact carrier in the off position (Fig. 1) or in the on position (Fig. 2).

In Fig. 3 ist der Fall dargestellt, daß mindestens ein Öffnerkontakt verschweißt ist oder der Kontaktträger 12 durch eine nicht dargestellte mechanische Verriegelung blockiert ist. Dadurch wirkt bei Erregung des Magnetsystems eine Gegenkraft F auf den Kontaktträger 12. Üblicherweise könnte sich der Anker 8 nicht mehr auf das feststehende Magnetteil 6 zubewegen. Dies würde zu einer Überlastung des Magnetsystems, insbesondere zum Durchbrennen seiner nicht dargestellten Erregerwicklung, oder zum Verbiegen von Öffnerkontakten und in der Folge zum Schließen der Schließerkontakte führen. Der Übertragungshebel 10 ist vorteilhafterweise als elastisch nachgiebiger Hebel (Schnapphebel) ausgebildet, der beim Überschreiten einer kritischen Belastung sprunghaft nachgibt. Dadurch wird einerseits das Magnetsystem durch magnetische Kontaktgabe des Ankers 8 mit dem feststehenden Magnetteil 6 geschlossen und anderseits die Gegenkraft F auf den Kontaktträger 12 begrenzt. Damit wird sowohl die Überlastung des Magnetkreises als auch die Schließung der Schließerkontakte wirksam verhindert, d.h., die Zwangsführung des elektromagnetischen Schaltgerätes 2 ist in jedem Falle gewährleistet.In Fig. 3 the case is shown that at least one break contact is welded or the contact carrier 12 by a mechanical lock, not shown, is blocked. As a result, a counterforce acts when the magnet system is excited F on the contact carrier 12. Usually the Anchor 8 no longer move towards the fixed magnetic part 6. This would overload the magnet system, in particular to blow his excitation winding, not shown, or for bending opener contacts and in the Result in closing the normally open contacts. The transmission lever 10 is advantageously more resilient Lever (snap lever) trained when exceeded gives way to a critical load by leaps and bounds. As a result, the magnet system is replaced by magnetic ones Contact of the armature 8 with the fixed magnetic part 6 closed and on the other hand the counterforce F on the contact carrier 12 limited. This will both overload the Magnetic circuit as well as the closing of the normally open contacts effectively prevents, i.e. the forced control of the electromagnetic Switching device 2 is guaranteed in any case.

Claims (5)

  1. Electromagnetic switching device with restricted guidance, containing a magnet system comprising an armature (8), a movable contact support (12) in which movable contact pieces are held that form opening and closer contacts together with fixed contacts and which takes a rest position brought about by spring force, and an elastic link between armature (8) and contact support (12), thus allowing a further movement of the armature (8) without actuating the closer contacts in case of welded opening contacts, characterized in that the movements of armature (8) and contact support (12) are along a path running in parallel at a distance, and in that an elastic and yielding transmission lever (10) is provided and establishes co-operation between armature (8) and contact support (12).
  2. Electromagnetic switching device as claimed in claim 2, characterized in that the transmission lever (10) rests on the casing of the switching device (4).
  3. Electromagnetic switching device as claimed in claim 3, characterized in that the transmission lever (10) is coupled with a free end (14) to the armature (8), that it rests with the other free end (16) on the casing part which receives the contact support (12), and that it is coupled to the contact support (12) between the two ends (14, 16).
  4. Electromagnetic switching device as claimed in any foregoing claim, characterized in that, in case of the opening contact being welded, the counteracting force (F) acting on the contact support (12) is limited by the maximum transmission force of the yielding transmission lever (10).
  5. Electromagnetic switching device as claimed in claim 4, characterized in that the transmission lever (10) presents a spring characteristic which yields in a discontinuous way when exceeding a critical load.
EP97906135A 1996-03-05 1997-02-27 Electromagnetic switching device with restricted guidance Expired - Lifetime EP0885448B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29604046U DE29604046U1 (en) 1996-03-05 1996-03-05 Electromagnetic switching device with positive guidance
DE29604046U 1996-03-05
PCT/EP1997/000956 WO1997033289A1 (en) 1996-03-05 1997-02-27 Electromagnetic switching device with restricted guidance

Publications (2)

Publication Number Publication Date
EP0885448A1 EP0885448A1 (en) 1998-12-23
EP0885448B1 true EP0885448B1 (en) 1999-12-01

Family

ID=8020546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97906135A Expired - Lifetime EP0885448B1 (en) 1996-03-05 1997-02-27 Electromagnetic switching device with restricted guidance

Country Status (7)

Country Link
US (1) US6094117A (en)
EP (1) EP0885448B1 (en)
JP (1) JP3320738B2 (en)
CN (1) CN1078961C (en)
AT (1) ATE187275T1 (en)
DE (2) DE29604046U1 (en)
WO (1) WO1997033289A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1437396A (en) * 1963-09-28 1966-05-06 Siemens Ag Electromagnetically actuated switching device, preferably a small contactor
FR1405231A (en) * 1963-11-21 1965-07-09 Europe Mfg Trust Improvement in the control of relay type devices
DE3146780C2 (en) * 1981-11-25 1985-10-24 Siemens AG, 1000 Berlin und 8000 München Multiple contact arrangement
DE3577159D1 (en) * 1984-08-17 1990-05-17 Siemens Ag AC POWER PROTECTION.
DE3540460A1 (en) * 1985-11-14 1987-05-21 Siemens Ag ELECTROMAGNETIC SWITCHGEAR
DE8811206U1 (en) * 1988-09-05 1988-10-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
JPH0758606B2 (en) * 1989-03-24 1995-06-21 三菱電機株式会社 Electromagnetic contactor
DE3927219C2 (en) * 1989-08-17 2001-07-05 Schlegel Georg Gmbh & Co Electrical switching device with a domed snap disc

Also Published As

Publication number Publication date
CN1212783A (en) 1999-03-31
ATE187275T1 (en) 1999-12-15
US6094117A (en) 2000-07-25
JP3320738B2 (en) 2002-09-03
JPH11505064A (en) 1999-05-11
CN1078961C (en) 2002-02-06
EP0885448A1 (en) 1998-12-23
DE59700796D1 (en) 2000-01-05
DE29604046U1 (en) 1996-05-02
WO1997033289A1 (en) 1997-09-12

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