EP0358051B1 - Electromagnetic switch gear - Google Patents

Electromagnetic switch gear Download PDF

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Publication number
EP0358051B1
EP0358051B1 EP89115583A EP89115583A EP0358051B1 EP 0358051 B1 EP0358051 B1 EP 0358051B1 EP 89115583 A EP89115583 A EP 89115583A EP 89115583 A EP89115583 A EP 89115583A EP 0358051 B1 EP0358051 B1 EP 0358051B1
Authority
EP
European Patent Office
Prior art keywords
contact
magnetic part
projections
armature
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.)
Expired - Lifetime
Application number
EP89115583A
Other languages
German (de)
French (fr)
Other versions
EP0358051A2 (en
EP0358051A3 (en
Inventor
Georg Streich
Günter Gnahn
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
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 EP0358051A2 publication Critical patent/EP0358051A2/en
Publication of EP0358051A3 publication Critical patent/EP0358051A3/en
Application granted granted Critical
Publication of EP0358051B1 publication Critical patent/EP0358051B1/en
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
    • 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
    • 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
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H01H50/305—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature damping vibration due to functional movement of armature

Definitions

  • the invention relates to an electromagnetic switching device with a movable magnetic part guided in a housing, which is coupled to a contact bridge support and in which stops in the form of projections for the movable magnetic part are provided on the housing.
  • the armature is firmly connected via a plunger to the contact piece of a contact bridge which works as a make contact.
  • the armature return spring engages on the tappet.
  • a second armature, which interacts with the coil of the magnet system, is provided with pins on which springs are attached which press the armature against the housing in the rest position. Since both anchors go through a movement when the magnet system is switched on, the springs acting on the pins become contact pressure springs.
  • the aim of the construction shown here is to prevent bruises during the switch-on process, so that the stops on which the first anchor rests in the idle state do not make any contribution to freedom from bouncing, especially since only make contacts are provided.
  • the invention has for its object to improve the bounce freedom when switching off. Such bruises occur particularly when the stops of the movable magnetic part carrying the contact bridges are provided on the plastic contact bridge support, as is the case, for example, with the switching device according to DE-A-23 60 907.
  • the object of the invention is achieved in a simple manner in that the projections are unevenly high in the direction of movement of the movable magnetic part and can be passed through openings in the contact bridge carrier encompassing the movable magnetic part for engagement with the magnetic part are.
  • the frictional relationships between plastic and iron are exploited and, on the other hand, the successive energy dissipation due to the offset projections is used.
  • the contact set to be attached can be designed equally for AC and DC contactors - it is advantageous if the movable magnet part is the hinged armature of a DC magnet system for the switching device and the coupling between the armature and the contact bridge support takes place via a connecting arm which is penetrated by the cross bar, which bears with its free ends in recesses in the contact bridge support and that a leaf spring is present, the ends of which lie in front of the openings for the projections in the contact bridge support, the leaf spring being in the center abuts the crossbar and in the end regions on the edges of the openings. It is advantageous here if the cross bar is designed for the optional holding of a movable AC magnetic part.
  • the movable magnetic part 1 shown in the drawing, FIG. 1, is the armature of an AC magnet, which is connected to the plastic contact bridge support 2 via a crossbar 3 connected is.
  • the crossbar 3 penetrates the armature 1 and its ends are held in recesses in the contact bridge support 2.
  • the contact bridge support is - as shown in FIG 2 - trough-shaped, with a tower-like extension 4 for holding the contact bridges, not shown, which can make make and break contacts with the fixed contact parts, and has openings 5 through which projections 6 and 7 can protrude .
  • the projections 6 and 7 are integrally formed on the housing of the switching device, not shown, wherein, for example, the projection 6 is somewhat longer than the projection 7, so that it comes into contact with the armature 1 when the armature 1 is switched off. This state is shown in FIGS. 1 and 3. After further movement, the projection 7 comes into contact with the armature 1 even with a slight tilting movement, so that two successive stops are present. The restoring movement of the contact bridge support 2 takes place via compression springs, not shown, which engage the contact bridge support 2.
  • a hinged armature 8 is provided, which is connected via a connecting arm 9 to the pivot pin 10 via the crossbar 3 to the contact bridge carrier 2.
  • the cross bar 3 penetrates the connecting arm in an opening 11 and is held with the free ends in the same recesses in the contact bridge support as in the AC armature version.
  • a leaf spring 12 is provided, which is supported with its central part on the cross bar 3 and with the free ends 13 and 14 on edges 15 such that they are on the projections 6 and 7 in the openings 5 lie on.
  • the mode of operation of the projections 6 and 7 when the switching device is switched off is therefore in accordance with the embodiment according to FIG. 1.
  • the design according to the invention means that the upper part of the switching device can be used both for AC and for DC magnet systems.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Breakers (AREA)
  • Vehicle Body Suspensions (AREA)
  • Electronic Switches (AREA)
  • Burglar Alarm Systems (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

The invention relates to an electromagnetic switchgear, in particular circuit-breaker. <??>With electromagnetic switchgear, in particular contact breakers, there is a significant requirement for constructing the circuit-breakers to be bounce-free. Due to the striking of the contact bridge support at the end of the switch-off process on the housing, particularly when plastics such as thermoplasts are used for the contact bridge support, rebouncing phenomena have been almost unavoidable. The present invention is intended to reduce these rebouncing phenomena substantially. <??>This is done by providing projections on the housing which are of unequal height in the movement direction of the armature, and which can project through openings of the contact bridge support so that the projections can come into contact with a metal part, preferably the armature itself, during switching off. <??>Electromagnetic switchgear with alternating current and also direct current magnet system. <IMAGE>

Description

Die Erfindung bezieht sich auf ein elektromagnetisches Schaltgerät mit einem in einem Gehäuse geführten beweglichen Magnetteil, der mit einem Kontaktbrückenträger gekoppelt ist und bei dem am Gehäuse Anschläge in Form von Vorsprüngen für den beweglichen Magnetteil vorgesehen sind.The invention relates to an electromagnetic switching device with a movable magnetic part guided in a housing, which is coupled to a contact bridge support and in which stops in the form of projections for the movable magnetic part are provided on the housing.

Bei einem bekannten Schaltgerät der obengenannten Art (DE-AS 1 151 302) ist der Anker über einen Stößel mit dem als Schliesser arbeitenden Schaltstück einer Kontaktbrücke fest verbunden. An dem Stößel greift die Ankerrückzugfeder an. Ein zweiter Anker, der mit der Spule des Magnetsystems zusammenwirkt, ist mit Zapfen versehen, auf denen Federn angebracht sind, die den Anker in der Ruhestellung gegen das Gehäuse drücken. Da hier beide Anker beim Einschalten des Magnetsystems eine Bewegung durchlaufen, werden die auf den Zapfen einwirkenden Federn zu Kontaktdruckfedern. Die hier dargestellte Konstruktion hat zum Ziel, Prellungen im Einschaltvorgang zu verhindern, so daß die Anschläge, an denen der erste Anker im Ruhezustand anliegt, keinen Beitrag zur Prellfreiheit liefern, zumal lediglich Schließerkontakte vorgesehen sind.In a known switching device of the type mentioned above (DE-AS 1 151 302), the armature is firmly connected via a plunger to the contact piece of a contact bridge which works as a make contact. The armature return spring engages on the tappet. A second armature, which interacts with the coil of the magnet system, is provided with pins on which springs are attached which press the armature against the housing in the rest position. Since both anchors go through a movement when the magnet system is switched on, the springs acting on the pins become contact pressure springs. The aim of the construction shown here is to prevent bruises during the switch-on process, so that the stops on which the first anchor rests in the idle state do not make any contribution to freedom from bouncing, especially since only make contacts are provided.

Der Erfindung liegt die Aufgabe zugrunde, die Prellfreiheit beim Ausschaltvorgang zu verbessern. Derartige Ausschaltprellungen treten besonders dann auf, wenn die Anschläge des beweglichen, die Kontaktbrücken tragenden Magnetteil am aus Kunststoff bestehenden Kontaktbrückenträger vorgesehen sind, wie dies beispielsweise beim Schaltgerät nach DE-A-23 60 907 der Fall ist. Die erfindungsgemäße Aufgabe wird auf einfache Weise dadurch gelöst, daß die Vorsprünge in Bewegungsrichtung des beweglichen Magnetteils ungleich hoch sind und durch Öffnungen des den beweglichen Magnetteil umgreifenden Kontaktbrückenträgers zum Eingriff mit dem Magnetteil hindurchführbar sind. Hier sind einerseits die Reibverhältnisse zwischen Kunststoff und Eisen ausgenutzt und zum anderen die zeitlich nacheinander folgende Energievernichtung infolge der versetzten Vorsprünge. Um auch die bei Wechselstrommagneten üblichen Kontaktbrückenträger, die den Wechselstrommagneten umgreifen, bei Gleichstromantrieben zu verwenden - d.h. der aufzusetzende Kontaktsatz kann bei Wechselstrom- und Gleichstromschützen gleich ausgeführt werden-,ist es vorteilhaft, wenn der bewegliche Magnetteil der Klappanker eines Gleichstrommagnetsystems für das Schaltgerät ist und die Kupplung zwischen Anker und Kontaktbrückenträger über einen Verbindungsarm erfolgt, der vom Querriegel durchdrungen ist, der mit seinen freien Enden in Ausnehmungen des Kontaktbrückenträgers anliegt und daß eine Blattfeder vorhanden ist, deren Enden vor den Öffnungen für die Vorsprünge im Kontaktbrückenträger liegen, wobei die Blattfeder mittig an dem Querriegel und in den Endbereichen an den Kanten der Öffnungen anliegt. Vorteilhaft ist es hierbei, wenn der Querriegel für die wahlweise Halterung eines beweglichen Wechselstrommagnetteils ausgebildet ist.The invention has for its object to improve the bounce freedom when switching off. Such bruises occur particularly when the stops of the movable magnetic part carrying the contact bridges are provided on the plastic contact bridge support, as is the case, for example, with the switching device according to DE-A-23 60 907. The object of the invention is achieved in a simple manner in that the projections are unevenly high in the direction of movement of the movable magnetic part and can be passed through openings in the contact bridge carrier encompassing the movable magnetic part for engagement with the magnetic part are. Here, on the one hand, the frictional relationships between plastic and iron are exploited and, on the other hand, the successive energy dissipation due to the offset projections is used. In order to also use the contact bridge carriers that are common with AC magnets, which encompass the AC magnet, for DC drives - i.e. the contact set to be attached can be designed equally for AC and DC contactors - it is advantageous if the movable magnet part is the hinged armature of a DC magnet system for the switching device and the coupling between the armature and the contact bridge support takes place via a connecting arm which is penetrated by the cross bar, which bears with its free ends in recesses in the contact bridge support and that a leaf spring is present, the ends of which lie in front of the openings for the projections in the contact bridge support, the leaf spring being in the center abuts the crossbar and in the end regions on the edges of the openings. It is advantageous here if the cross bar is designed for the optional holding of a movable AC magnetic part.

Anhand der Zeichnung werden Ausführungsbeispiele gemäß der Erfindung beschrieben.Exemplary embodiments according to the invention are described with the aid of the drawing.

Es zeigen:

FIG 1
Teile eines elektromagnetischen Schaltgerätes mit einem für Wechselstrom geeigneten Anker in Seitenansicht, zum Teil im Schnitt, mit Teilen des Gehäuses,
FIG 2
die Draufsicht auf den Kontaktbrückenträger,
FIG 3
die Anordnung nach FIG 1 unter Verwendung eines Klappankers für ein Gleichstrommagnetsystem in Seitenansicht.
Show it:
FIG. 1
Parts of an electromagnetic switching device with an armature suitable for alternating current in side view, partly in section, with parts of the housing,
FIG 2
the top view of the contact bridge support,
FIG 3
the arrangement of Figure 1 using a hinged armature for a DC magnet system in side view.

Das in der Zeichnung, FIG 1, dargestellte bewegliche Magnetteil 1 ist der Anker eines Wechselstrommagneten, der mit dem Kontaktbrückenträger 2 aus Kunststoff über einen Querriegel 3 verbunden ist. Der Querriegel 3 durchdringt den Anker 1 und ist mit seinen Enden in Ausnehmungen des Kontaktbrückenträgers 2 gehalten. Der Kontaktbrückenträger ist - wie die FIG 2 zeigt - wannenförmig ausgebildet, mit einem turmartigen Ansatz 4 zur Halterung der nicht dargestellten Kontaktbrücken, die Schließer- und Öffnerkontakte mit den feststehenden Kontaktteilen bilden können, und hat Öffnungen 5, durch die Vorsprünge 6 und 7 hindurchragen können. Die Vorsprünge 6 und 7 sind am nicht näher dargestellten Gehäuse des Schaltgerätes angeformt, wobei z.B. der Vorsprung 6 etwas länger ist als der Vorsprung 7, so daß dieser bei der Ausschaltbewegung des Ankers 1 zuerst mit diesem in Berührung kommt. Dieser Zustand ist in FIG 1 und FIG 3 dargestellt. Nach weiterer Bewegung kommt auch bei leichter Kippbewegung der Vorsprung 7 mit dem Anker 1 in Berührung, so daß zwei zeitlich aufeinanderfolgende Anschläge vorhanden sind. Die Rückstellbewegung des Kontaktbrückenträgers 2 erfolgt über nicht dargestellte Druckfedern, die am Kontaktbrückenträger 2 angreifen.The movable magnetic part 1 shown in the drawing, FIG. 1, is the armature of an AC magnet, which is connected to the plastic contact bridge support 2 via a crossbar 3 connected is. The crossbar 3 penetrates the armature 1 and its ends are held in recesses in the contact bridge support 2. The contact bridge support is - as shown in FIG 2 - trough-shaped, with a tower-like extension 4 for holding the contact bridges, not shown, which can make make and break contacts with the fixed contact parts, and has openings 5 through which projections 6 and 7 can protrude . The projections 6 and 7 are integrally formed on the housing of the switching device, not shown, wherein, for example, the projection 6 is somewhat longer than the projection 7, so that it comes into contact with the armature 1 when the armature 1 is switched off. This state is shown in FIGS. 1 and 3. After further movement, the projection 7 comes into contact with the armature 1 even with a slight tilting movement, so that two successive stops are present. The restoring movement of the contact bridge support 2 takes place via compression springs, not shown, which engage the contact bridge support 2.

Im Ausführungsbeispiel nach FIG 3 ist anstelle des Wechselstromankers 1 ein Klappanker 8 vorgesehen, der über einen Verbindungsarm 9 mit dem Drehzapfen 10 über den Querriegel 3 mit dem Kontaktbrückenträger 2 verbunden ist. Der Querriegel 3 durchdringt den Verbindungsarm in einer Öffnung 11 und ist mit den freien Enden in denselben Ausnehmungen des Kontaktbrückenträgers gehalten, wie bei der Wechselstromankerausführung. Um auch für diese Anordnung die Anschläge zu schaffen, ist eine Blattfeder 12 vorgesehen, die sich mit ihrem Mittelteil am Querriegel 3 abstützt und mit den freien Enden 13 und 14 an Kanten 15 derart anliegt, daß sie auf den Vorsprüngen 6 und 7 in den Öffnungen 5 aufliegen. Die Wirkungsweise der Vorsprünge 6 und 7 beim Ausschalten des Schaltgerätes ist somit entsprechend der Ausführung nach FIG 1. Durch die erfindungsgemäße Ausbildung kann somit das Oberteil des Schaltgerätes sowohl für Wechsel- als auch für Gleichstrommagnetsysteme verwandt werden.In the exemplary embodiment according to FIG. 3, instead of the alternating current armature 1, a hinged armature 8 is provided, which is connected via a connecting arm 9 to the pivot pin 10 via the crossbar 3 to the contact bridge carrier 2. The cross bar 3 penetrates the connecting arm in an opening 11 and is held with the free ends in the same recesses in the contact bridge support as in the AC armature version. In order to create the stops for this arrangement, a leaf spring 12 is provided, which is supported with its central part on the cross bar 3 and with the free ends 13 and 14 on edges 15 such that they are on the projections 6 and 7 in the openings 5 lie on. The mode of operation of the projections 6 and 7 when the switching device is switched off is therefore in accordance with the embodiment according to FIG. 1. The design according to the invention means that the upper part of the switching device can be used both for AC and for DC magnet systems.

Claims (3)

  1. Electromagnetic switching device having a movable magnetic part which is guided in a housing and which is coupled to a contact bridge carrier, and in which stops in the form of projections are provided for the movable magnetic part on the housing, characterized in that the projections (6, 7) are of unequal height in the direction of movement of the movable magnetic part (1) and can be passed through openings (5) in the contact bridge carrier (2) engaging round the movable magnetic part (1) for the purpose of engagement with the magnetic part (1).
  2. Switching device according to Claim 1, characterized in that the movable magnetic part is the clapper-type armature (8) of a direct-current magnet system for the switching device and the coupling between armature (8) and contact-bridge carrier (2) takes place via a linking arm (9) which has, passing through it, a cross bracket (3) whose free ends rest in the recesses in the contact-bridge carrier (2), and in that a leaf spring (12) is present whose ends (13, 14) are situated in front of the openings (5) for the projections (6, 7) in the contact-bridge carrier (2), the leaf spring (12) resting centrally on the cross bracket (3) and on the edges (15) of the openings (5) in the end regions.
  3. Switching device according to Claim 2, characterized in that the cross bracket (3) is designed for the optional mounting of a movable alternating-current magnetic part (1).
EP89115583A 1988-09-05 1989-08-23 Electromagnetic switch gear Expired - Lifetime EP0358051B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8811207U 1988-09-05
DE8811207U DE8811207U1 (en) 1988-09-05 1988-09-05 Electromagnetic switching device

Publications (3)

Publication Number Publication Date
EP0358051A2 EP0358051A2 (en) 1990-03-14
EP0358051A3 EP0358051A3 (en) 1991-07-31
EP0358051B1 true EP0358051B1 (en) 1994-11-02

Family

ID=6827579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115583A Expired - Lifetime EP0358051B1 (en) 1988-09-05 1989-08-23 Electromagnetic switch gear

Country Status (4)

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US (1) US5038124A (en)
EP (1) EP0358051B1 (en)
AT (1) ATE113753T1 (en)
DE (2) DE8811207U1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110037543A1 (en) * 2007-10-11 2011-02-17 Dale Walter Lange Electrical switching device
JP5776449B2 (en) * 2011-08-30 2015-09-09 株式会社デンソー Electromagnetic switch
DE102018207468B3 (en) * 2018-05-15 2019-08-29 Siemens Aktiengesellschaft Switching device with a reduced mechanical impact load when the operating mode changes to the switched-off state
EP4131782A1 (en) * 2021-08-04 2023-02-08 Schneider Electric Industries SAS Electrical contactless switch

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151302B (en) * 1958-12-31 1963-07-11 Continental Elektro Ind Ag Electromagnetic contactor with two armatures moving in opposite directions
ES259619A1 (en) * 1959-07-17 1960-12-01 Normacen Sa Improvements in or relating to electromagnetic contactors
DE7235951U (en) * 1972-09-29 1976-04-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Electromagnetic switching device
GB1416652A (en) * 1973-04-26 1975-12-03 Siemens Ag Switching devices
DE2360907B2 (en) * 1973-12-06 1981-02-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Arrangement for holding springs
DE3335731A1 (en) * 1983-10-01 1985-04-11 Brown, Boveri & Cie Ag, 6800 Mannheim Device for resetting the contact carrier of an electromagnetic switching apparatus, especially of a contactor
DE3439788A1 (en) * 1984-10-31 1986-04-30 Brown, Boveri & Cie Ag, 6800 Mannheim Device for connecting a magnetic armature of an electromagnetic contactor to the contact carrier
US4616202A (en) * 1984-11-20 1986-10-07 Mitsubishi Denki Kabushiki Kaisha Electromagnetic contactor

Also Published As

Publication number Publication date
DE8811207U1 (en) 1988-10-27
US5038124A (en) 1991-08-06
EP0358051A2 (en) 1990-03-14
ATE113753T1 (en) 1994-11-15
EP0358051A3 (en) 1991-07-31
DE58908584D1 (en) 1994-12-08

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