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EP0447401B1 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
EP0447401B1
EP0447401B1 EP89909153A EP89909153A EP0447401B1 EP 0447401 B1 EP0447401 B1 EP 0447401B1 EP 89909153 A EP89909153 A EP 89909153A EP 89909153 A EP89909153 A EP 89909153A EP 0447401 B1 EP0447401 B1 EP 0447401B1
Authority
EP
European Patent Office
Prior art keywords
contact
main
yoke
connecting webs
preliminary
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
EP89909153A
Other languages
German (de)
French (fr)
Other versions
EP0447401A1 (en
Inventor
Hans-Dieter Schmid
Anton Frenznick
Dieter Mach
Karl Brandsch
Volker Busch
Manfred Mitsch
Theodor Sturm
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP0447401A1 publication Critical patent/EP0447401A1/en
Application granted granted Critical
Publication of EP0447401B1 publication Critical patent/EP0447401B1/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
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/34—Contacts characterised by the manner in which co-operating contacts engage by abutting with provision for adjusting position of contact relative to its co-operating contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H2011/0075—Apparatus or processes specially adapted for the manufacture of electric switches calibrating mechanical switching properties, e.g. "snap or switch moment", by mechanically deforming a part of the switch, e.g. elongating a blade spring by puncturing it with a laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • the invention relates to an electromagnetic relay according to the preamble of claim 1.
  • the switching contact of the relay is set by a squeezing process on a central leg of the contact carrier, at the angled free end of which the relay contact is fastened.
  • the pinch is carried out in a stretching zone of the leg, which is arranged between connecting webs projecting symmetrically on both sides to adjacent legs and a yoke of the contact carrier connecting the three legs.
  • the aim is to set the main and pre-contact of power relays as simply, accurately, reliably and independently of each other as possible at low cost with as little effort as possible.
  • the relay according to the invention with the characterizing features of claim 1 has the advantage that, independently of one another, the advance of the pre-contact to the main contact, ie the contact sequence and the contact pressure and, as a result, the so-called erosion reserve can be set very precisely, quickly and reliably without the can subsequently change the set values, such as B. by elastic deformations during a bending adjustment of the contact carrier.
  • Another advantage is that the contact carrier can be produced from a single stamped part without great effort, which is to be anchored together with the magnetic yoke of the relay in a base plate.
  • a plane-parallel, angular extension of the main and pre-contact is ensured by the connecting webs projecting symmetrically on both sides from the center leg of the main and the pre-contact.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the figure shows a power relay for motor vehicles with a pre and main contact.
  • a power relay 10 for electrical direct current consumers with a high starting current is shown, as used in particular in motor vehicles for switching on and off electromagnetic valves and electric motors.
  • the relay is with a base plate 11 made of insulating material in which a plurality of connection parts 12 are fastened, which protrude downward from the base plate 11.
  • the base plate 11 also carries an L-shaped magnetic yoke 13 which is anchored on one end face with fastening tongues in corresponding pockets of the base plate 11.
  • a relay winding 14 is arranged on a coil core 15 which is riveted with its rear end to the magnetic yoke 13.
  • a hinged armature 16 In front of the free end of the coil core 15, a hinged armature 16 is arranged, which is pivotally mounted with its rear end on the magnetic yoke 13.
  • a leaf spring 17 is riveted to the hinged armature 16, the front end of which projects beyond the hinged armature 16 and carries two switching contacts 18 and 19 which are spaced apart from one another, of which only the regions riveted to the leaf spring 17 are visible.
  • the other end of the leaf spring 17 is guided around the bearing point of the hinged armature 16 on the magnetic yoke 13 and fastened to the rear of the magnetic yoke 13 with a corresponding preload in order to achieve a restoring force for the hinged armature 16.
  • the leaf spring 17 also serves the switching contacts 18, 19 for power supply.
  • the restoring force for the hinged armature 16 can alternatively also be generated by a helical tension spring which is suspended from a respective not recognizable projection of the hinged armature 16 and the magnetic yoke 13.
  • the shortened rear end of the leaf spring 17 is connected to one of the connecting parts 12 via a welded-on copper wire.
  • the switch contact 18 on the leaf spring 17 of the hinged armature 16 interacts with a fixed pre-contact 20 and the switch contact 19 with a fixed main contact 21, which forms the normally open contact of the relay.
  • the pre-contact 20 and the switching contact 18 cooperating therewith are made of a burn-off-resistant material for absorbing the high inrush current surge, whereas the main contact 21 and the switching contact 19 interacting therewith consists of a silver-nickel alloy with low contact resistance for absorbing the continuous current.
  • Pre-contact 20 and main contact 21 are attached to a common contact carrier 22, which is also attached to the base plate 11 and is firmly connected to one of the connecting parts 12.
  • the contact carrier 22 is provided in a region running in the direction of movement of the hinged armature 16 with a plurality of legs 23 to 27 which run at a distance from one another and which start from a common yoke 28.
  • the second leg 24 carries the main contact 21 at its angled free end 24a and the fourth leg 26 carries the pre-contact 20 at the free angled end 26a.
  • the leg 24 with the main contact 21 is connected to the adjacent legs 23 and 25 by connecting webs 29 projecting symmetrically on both sides connected, which prevent an inclination of the contact when adjusting the main contact 21.
  • the leg 26 is connected to the pre-contact 21 by means of connecting webs 30 projecting symmetrically on both sides with the adjacent legs 25 and 27.
  • a stretching zone 31 and 32 is provided on the legs 24 and 26 carrying the main contact 21 and the pre-contact 20, respectively.
  • the embossing pliers then crimp the leg 26 carrying the pre-contact 20 in its stretching zone 32 and raise the angled end 26a to such an extent that the pre-contact 20 leads the main contact 21 by a desired amount of approximately 0.1 mm when the relay contacts close .
  • This advance can expediently be specified by a correspondingly thicker pre-contact 20 with respect to the main contact 21, so that the leg ends 26a and 24a can be angled at the same height during the manufacture of the contact carrier 22. In addition, this prevents excessive squeezing in the stretching zone 32 of the leg 26.
  • all the legs 23 to 27 of the contact carrier 22 are rigidly connected to one another at their ends facing away from the main contact 21 and pre-contact 20 via the common yoke 28, this yoke 28 being so stably fastened on the base plate 11 via a base plate 33 of the contact carrier 22 that the yoke 28 does not yield during the adjustment process.
  • the lower leg 23 is kept relatively short.
  • the contact carrier 22 can also with another area, for. B. the yoke area on the base plate 11 or other supporting parts of the relay.
  • the main and pre-contact can be adjusted independently of one another through the extension zones 31 and 32 of the legs 24, 26 carrying them, the lateral connecting webs 29, 30 serving for lateral guidance and partly also for power conduction.
  • the connecting webs 29, 30 located between the legs 24 and 26 with the main contact 21 and the pre-contact 20 are expediently connected to a common adjacent leg 25.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

An electromagnetic relay for consumers with a high switch-on current surge is proposed which has a main contact (21) and a preliminary contact (20). Both main (21) and preliminary (20) contacts are fitted at a squared-off end (24a, 26a) of each of several spaced tags (23 to 27) arranged side by side and proceeding from a common yoke (28) of a terminal support (22). The tags (24, 26) bearing the main and preliminary contacts (21, 20) are each connected on each side to a neighbouring tag (23, 25, 27) via connecting webs (29, 30). Between the yoke (28) and the connecting webs (29, 30), the tags (24, 26) bearing the main and preliminary contacts (21, 20) each have an extension zone (31, 32) where the main and preliminary contacts (21, 20) may be independently adjusted by compressing the material.

Description

Die Erfindung geht aus von einem elektromagnetischen Relais nach der Gattung des Patentanspruchs 1.The invention relates to an electromagnetic relay according to the preamble of claim 1.

Bei einem solchen, aus der DE-PS 36 40 997 bekannten Relais wird der Schaltkontakt des Relais durch einen Quetschvorgang an einem mittleren Schenkel des Kontaktträgers eingestellt, an dessen abgewinkeltem freien Ende der Relaiskontakt befestigt ist. Die Quetschung wird in einer Streckzone des Schenkels vorgenommen, die zwischen beidseitig symmetrisch abstehenden Verbindungsstegen zu benachbarten Schenkeln und einem die drei Schenkel verbindenden Joch des Kontaktträgers angeordnet ist.In such a relay known from DE-PS 36 40 997, the switching contact of the relay is set by a squeezing process on a central leg of the contact carrier, at the angled free end of which the relay contact is fastened. The pinch is carried out in a stretching zone of the leg, which is arranged between connecting webs projecting symmetrically on both sides to adjacent legs and a yoke of the contact carrier connecting the three legs.

Die Verwendung derartiger Relais zum Einschalten von elektromagnetischen Verbrauchern wie Elektromotoren, Magnetventilen und dergleichen ist jedoch wegen den dabei auftretenden hohen Einschaltströmen nur begrenzt möglich, da die Silber-Nickel-Legierung der Relaiskontakte zwar einen relativ kleinen Übergangswiderstand bewirkt, bei hoher Strombelastung jedoch zu einer schnellen Abnutzung der Kontakte führt. Bei größeren Verbrauchern bzw.However, the use of such relays for switching on electromagnetic consumers such as electric motors, solenoid valves and the like is only possible to a limited extent because of the high inrush currents that occur, since the silver-nickel alloy of the relay contacts causes a relatively low contact resistance, but at high current loads leads to a rapid one Wear of the contacts leads. For larger consumers or

Verbrauchern mit hohen Einschaltstromstärken ist es daher in Kraftfahrzeugen bekannt, Relais mit einem Haupt- und Vorkontakt zu verwenden gemäß DE-OS 30 08 089), wobei der Vorkontakt zur Aufnahme des hohen Einschaltstromes aus einem abbrandfesten Material, z. B. Wolfram, hergestellt ist, das jedoch einen erheblich höheren Übergangswiderstand als das Material des Hauptkontaktes aufweist. Bei derartigen Relais muß die Voreilung des Vorkontaktes sowie die Abbrandreserve und der Kontaktdruck von Vor- und Hauptkontakt unabhängig voneinander einjustiert werden. Üblicherweise werden dazu bislang Justierschrauben am Relais angebracht, die eine aufwendige Herstellung, Montage und Einjustierung erfordern und die außerdem nach dem Justiervorgang durch Kleber oder durch eine Schweißung gesichert werden müssen. Bekannt ist ferner, Haupt- und Vorkontakt solcher Relais unabhängig voneinander an jeweils einem Kontaktträger durch eine Präge- bzw. Kerbjustierung einzustellen, wie sie aus der DE-OS 30 12 354 (R. 6210) bekannt ist. Hierbei ist jedoch nachteilig, daß durch den Kerb- bzw. Prägevorgang die Kontakte durch ungleichmäßiges Materialgefüge des Kontaktträgers schräg oder schief gestellt werden, was zu einem erhöhten Kontaktabbrand führen kann.Consumers with high inrush currents, it is therefore known in motor vehicles to use relays with a main and pre-contact according to DE-OS 30 08 089), the pre-contact for receiving the high inrush current from a burn-resistant material, for. B. tungsten, is produced, but which has a considerably higher contact resistance than the material of the main contact. With such relays, the advance of the pre-contact and the erosion reserve and the contact pressure of the pre-contact and main contact must be adjusted independently of one another. Usually, adjustment screws have hitherto been attached to the relay, which require complex manufacture, assembly and adjustment, and which also have to be secured by adhesive or by welding after the adjustment process. It is also known to set the main and pre-contact of such relays independently of one another on a contact carrier by means of an embossing or notch adjustment, as is known from DE-OS 30 12 354 (R. 6210). However, this has the disadvantage that the notches or embossing process cause the contacts to be inclined or crooked due to the uneven material structure of the contact carrier, which can lead to increased contact erosion.

Vorteile der ErfindungAdvantages of the invention

Mit der vorliegenden Lösung wird angestrebt, den Haupt- und Vorkontakt von Leistungsrelais möglichst einfach, genau, zuverlässig und unabhängig voneinander mit möglichst geringem Aufwand kostengünstig einzustellen.With the present solution, the aim is to set the main and pre-contact of power relays as simply, accurately, reliably and independently of each other as possible at low cost with as little effort as possible.

Das erfindungsgemäße Relais mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat den Vorteil, daß unabhängig voneinander die Voreilung des Vorkontaktes zum Hauptkontakt, d. h. die Kontaktfolge sowie der Kontaktdruck und infolge dessen die sogenannte Abbrandreserve sehr exakt, schnell und zuverlässig eingestellt werden kann, ohne daß sich die eingestellten Werte nachträglich verändern können, wie z. B. durch elastische Verformungen bei einer Biegejustierung des Kontaktträgers. Ein weiterer Vorteil besteht darin, daß sich der Kontaktträger ohne größeren Aufwand aus einem einzigen Stanzteil herstellen läßt, das gemeinsam mit dem Magnetjoch des Relais in einer Grundplatte zu verankern ist. Außerdem wird eine planparallele, winkelhaltige Streckung des Haupt- und Vorkontaktes durch die jeweils vom Mittelschenkel des Haupt- und des Vorkontaktes beidseitig symmetrisch abstehenden Verbindungsstege gewährleistet.The relay according to the invention with the characterizing features of claim 1 has the advantage that, independently of one another, the advance of the pre-contact to the main contact, ie the contact sequence and the contact pressure and, as a result, the so-called erosion reserve can be set very precisely, quickly and reliably without the can subsequently change the set values, such as B. by elastic deformations during a bending adjustment of the contact carrier. Another advantage is that the contact carrier can be produced from a single stamped part without great effort, which is to be anchored together with the magnetic yoke of the relay in a base plate. In addition, a plane-parallel, angular extension of the main and pre-contact is ensured by the connecting webs projecting symmetrically on both sides from the center leg of the main and the pre-contact.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Patentanspruch 1 angegebenen Merkmale möglich. Dabei ist es zur Erhöhung der Stabilität des Kontaktträgers vorteilhaft, wenn alle Schenkel des Kontaktträgers an ihrem den Haupt- und Vorkontakt abgewandten Ende über ein gemeinsames Joch miteinander starr verbunden sind. Außerdem ist es zweckmäßig, zwischen den Schenkeln mit dem Hauptkontakt und dem Nebenkontakt nur einen weiteren Schenkel anzuordnen, mit dem die zwischen den Schenkeln des Haupt- und des Nebenkontaktes liegenden Verbindungsstege verbunden sind.The measures listed in the subclaims allow advantageous developments and improvements of the features specified in claim 1. To increase the stability of the contact carrier, it is advantageous if all the legs of the contact carrier are rigidly connected to one another at their end facing away from the main and pre-contact by means of a common yoke. In addition, it is expedient to arrange only one further leg between the legs with the main contact and the secondary contact, with which the connecting webs lying between the legs of the main and the secondary contact are connected.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläuert. Die Figur zeigt ein Leistungsrelais für Kraftfahrzeuge mit einem Vor- und Hauptkontakt.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The figure shows a power relay for motor vehicles with a pre and main contact.

Beschreibung des AusführungsbeispielesDescription of the embodiment

In der Zeichnung ist ein Leistungsrelais 10 für elektrische Gleichstromverbraucher mit hohem Anlaufstrom dargestellt, wie sie insbesondere in Kraftfahrzeugen zum Ein- und Ausschalten von elektromagnetischen Ventilen und Elektromotoren z. B. für Pumpen sowie von Glühkerzen benötigt werden. Das Relais ist mit einer Grundplatte 11 aus Isolierstoff versehen, in der mehrere Anschlußteile 12 befestigt sind, die nach unten aus der Grundplatte 11 herausragen. Die Grundplatte 11 trägt ferner ein L-förmiges Magnetjoch 13, das an einer Stirnseite mit Befestigungszungen in entsprechende Taschen der Grundplatte 11 verankert ist. Eine Relaiswicklung 14 ist auf einem Spulenkern 15 angeordnet, der mit seinem hinteren Ende am Magnetjoch 13 festgenietet ist. Vor dem freien Ende des Spulenkernes 15 ist ein Klappanker 16 angeordnet, der mit seinem hinteren Ende am Magnetjoch 13 schwenkbar gelagert ist. Auf dem Klappanker 16 ist eine Blattfeder 17 festgenietet, deren vorderes, über den Klappanker 16 hinausragende Ende zwei mit Abstand nebeneinander liegende Schaltkontakte 18 und 19 trägt, von denen nur die mit der Blattfeder 17 vernieteten Bereiche erkennbar sind. Das andere Ende der Blattfeder 17 ist um die Lagerstelle des Klappankers 16 am Magnetjoch 13 herumgeführt und zur Erzielung einer Rückstellkraft für den Klappanker 16 mit entsprechender Vorspannung an der Rückseite des Magnetjochs 13 befestigt. Die Blattfeder 17 dient ferner den Schaltkontakten 18, 19 zur Stromzuführung. Die Rückstellkraft für den Klappanker 16 kann alternativ auch durch eine Schraubenzugfeder erzeugt werden, die an jeweils einem nicht erkennbaren Vorsprung des Klappankers 16 und des Magnetjochs 13 eingehängt wird. In diesem Fall wird das verkürzte hintere Ende der Blattfeder 17 über eine angeschweißte Kupferlitze mit einem der Anschlußteile 12 verbunden.In the drawing, a power relay 10 for electrical direct current consumers with a high starting current is shown, as used in particular in motor vehicles for switching on and off electromagnetic valves and electric motors. B. for pumps and glow plugs. The relay is with a base plate 11 made of insulating material in which a plurality of connection parts 12 are fastened, which protrude downward from the base plate 11. The base plate 11 also carries an L-shaped magnetic yoke 13 which is anchored on one end face with fastening tongues in corresponding pockets of the base plate 11. A relay winding 14 is arranged on a coil core 15 which is riveted with its rear end to the magnetic yoke 13. In front of the free end of the coil core 15, a hinged armature 16 is arranged, which is pivotally mounted with its rear end on the magnetic yoke 13. A leaf spring 17 is riveted to the hinged armature 16, the front end of which projects beyond the hinged armature 16 and carries two switching contacts 18 and 19 which are spaced apart from one another, of which only the regions riveted to the leaf spring 17 are visible. The other end of the leaf spring 17 is guided around the bearing point of the hinged armature 16 on the magnetic yoke 13 and fastened to the rear of the magnetic yoke 13 with a corresponding preload in order to achieve a restoring force for the hinged armature 16. The leaf spring 17 also serves the switching contacts 18, 19 for power supply. The restoring force for the hinged armature 16 can alternatively also be generated by a helical tension spring which is suspended from a respective not recognizable projection of the hinged armature 16 and the magnetic yoke 13. In this case, the shortened rear end of the leaf spring 17 is connected to one of the connecting parts 12 via a welded-on copper wire.

Der Schaltkontakt 18 an der Blattfeder 17 des Klappankers 16 wirkt mit einem feststehenden Vorkontakt 20 und der Schaltkontakt 19 mit einem feststehenden Hauptkontakt 21 zusammen, der den Arbeitskontakt des Relais bildet. Der Vorkontakt 20 und der damit zusammenwirkende Schaltkontakt 18 ist aus einem abbrandfesten Material zur Aufnahme des hohen Einschaltstromstoßes hergestellt, wogegen der Hauptkontakt 21 und der damit zusammenwirkende Schaltkontakt 19 aus einer Silber-Nickel-Legierung mit geringem Übergangswiderstand zur Aufnahme des Dauerstromes besteht. Beim Einschalten des Relais 10 wird der Klappanker 16 durch das Magnetfeld der Relaiswicklung 14 auf den Spulenkern 15 gezogen, wobei Vorkontakt 20 und Hauptkontakt 21 nacheinander geschlossen werden. Beim Schließen dieser Kontakte muß der Vorkontakt 20 dem Hauptkontakt 21 soweit vorauseilen, daß der Einschaltstromstoß in ausreichendem Maße vom Vorkontakt 20 übernommen wird. Außerdem muß für die sogenannte Abbrandreserve der Kontaktdruck am Hauptkontakt 21 einjustiert werden. Vorkontakt 20 und Hauptkontakt 21 sind dabei an einem gemeinsamen Kontaktträger 22 angebracht, der ebenfalls auf der Grundplatte 11 befestigt und mit einem der Anschlußteile 12 fest verbunden ist.The switch contact 18 on the leaf spring 17 of the hinged armature 16 interacts with a fixed pre-contact 20 and the switch contact 19 with a fixed main contact 21, which forms the normally open contact of the relay. The pre-contact 20 and the switching contact 18 cooperating therewith are made of a burn-off-resistant material for absorbing the high inrush current surge, whereas the main contact 21 and the switching contact 19 interacting therewith consists of a silver-nickel alloy with low contact resistance for absorbing the continuous current. When the relay 10 is turned on the hinged armature 16 is pulled through the magnetic field of the relay winding 14 onto the coil core 15, the pre-contact 20 and the main contact 21 being closed in succession. When these contacts close, the pre-contact 20 must lead the main contact 21 so far that the inrush current is taken over by the pre-contact 20 to a sufficient extent. In addition, the contact pressure at the main contact 21 must be adjusted for the so-called erosion reserve. Pre-contact 20 and main contact 21 are attached to a common contact carrier 22, which is also attached to the base plate 11 and is firmly connected to one of the connecting parts 12.

Zur Einjustierung des Hauptkontaktes 21 und des Vorkontaktes 20 unabhängig voneinander ist der Kontaktträger 22 in einem in Bewegungsrichtung des Klappankers 16 verlaufenden Bereich mit mehreren, mit Abstand nebeneinander verlaufenden Schenkeln 23 bis 27 versehen, die von einem gemeinsamen Joch 28 ausgehen. Der zweite Schenkel 24 trägt an seinem abgewinkelten freien Ende 24a den Hauptkontakt 21 und der vierte Schenkel 26 trägt am freien abgewinkelten Ende 26a den Vorkontakt 20. Der Schenkel 24 mit dem Hauptkontakt 21 ist durch beidseitig symmetrisch abstehende Verbindungsstege 29 mit den benachbarten Schenkeln 23 und 25 verbunden, die bei der Einjustierung des Hauptkontaktes 21 eine Schrägstellung des Kontaktes verhindern. In gleicher Weise ist der Schenkel 26 mit dem Vorkontakt 21 durch beidseitig symmetrisch abstehende Verbindungsstege 30 mit den benachbarten Schenkeln 25 und 27 verbunden. Zwischen den Verbindungsstegen 29 und 30 sowie dem Joch 28 des Kontaktträgers 22 ist an den den Hauptkontakt 21 bzw. den Vorkontakt 20 tragenden Schenkeln 24 bzw. 26 jeweils eine Streckzone 31 bzw. 32 vorgesehen. Bei der Kontaktjustierung des Relais 10 wird zunächst mit einer Prägezange der den Hauptkontakt 21 tragende Schenkel 24 in seiner Streckzone 31 gequetscht, so daß das abgewinkelte Ende 24a des Schenkels 24 durch die Verbindungsstege 21 exakt geführt sowie angehoben wird, bis bei angezogenem Klappanker 16 der erforderliche Kontaktdruck bzw. die erforderliche Abbrandreserve eingestellt ist. Durch die bleibende Verformung in der Streckzone 31 erfolgt somit eine schnelle, genaue und dauerhafte Kontaktjustierung. Unabhängig davon wird dann mit der Prägezange der den Vorkontakt 20 tragende Schenkel 26 in seiner Streckzone 32 gequetscht und das abgewinkelte Ende 26a so weit angehoben, daß der Vorkontakt 20 den Hauptkontakt 21 beim Schließen der Relaiskontakte um einen gewünschten Betrag von etwa 0,1 mm vorauseilt. Diese Voreilung läßt sich zweckmäßigerweise durch einen entsprechend dickeren Vorkontakt 20 gegenüber dem Hauptkontakt 21 vorgeben, so daß bei der Herstellung des Kontaktträgers 22 die Schenkelenden 26a und 24a auf gleicher Höhe abgewinkelt werden können. Außerdem wird dadurch eine zu starke Quetschung in der Streckzone 32 des Schenkels 26 vermieden.In order to adjust the main contact 21 and the pre-contact 20 independently of one another, the contact carrier 22 is provided in a region running in the direction of movement of the hinged armature 16 with a plurality of legs 23 to 27 which run at a distance from one another and which start from a common yoke 28. The second leg 24 carries the main contact 21 at its angled free end 24a and the fourth leg 26 carries the pre-contact 20 at the free angled end 26a. The leg 24 with the main contact 21 is connected to the adjacent legs 23 and 25 by connecting webs 29 projecting symmetrically on both sides connected, which prevent an inclination of the contact when adjusting the main contact 21. In the same way, the leg 26 is connected to the pre-contact 21 by means of connecting webs 30 projecting symmetrically on both sides with the adjacent legs 25 and 27. Between the connecting webs 29 and 30 and the yoke 28 of the contact carrier 22, a stretching zone 31 and 32, respectively, is provided on the legs 24 and 26 carrying the main contact 21 and the pre-contact 20, respectively. When adjusting the contact of the relay 10, the leg 24 carrying the main contact 21 is first squeezed in its extension zone 31 with an embossing pliers, so that the angled end 24a of the leg 24 is guided and raised exactly by the connecting webs 21 until the required when the hinged anchor 16 is tightened Contact pressure or the required burn-up reserve is set. Due to the permanent deformation in the stretching zone 31, a quick, accurate and permanent contact adjustment takes place. Regardless of this, the embossing pliers then crimp the leg 26 carrying the pre-contact 20 in its stretching zone 32 and raise the angled end 26a to such an extent that the pre-contact 20 leads the main contact 21 by a desired amount of approximately 0.1 mm when the relay contacts close . This advance can expediently be specified by a correspondingly thicker pre-contact 20 with respect to the main contact 21, so that the leg ends 26a and 24a can be angled at the same height during the manufacture of the contact carrier 22. In addition, this prevents excessive squeezing in the stretching zone 32 of the leg 26.

Bei dem Ausführungsbeispiel sind alle Schenkel 23 bis 27 des Kontaktträgers 22 an ihren dem Hauptkontakt 21 und Vorkontakt 20 abgewandten Enden über das gemeinsame Joch 28 miteinander starr verbunden, wobei dieses Joch 28 über eine Fußplatte 33 des Kontaktträgers 22 auf der Grundplatte 11 so stabil befestigt ist, daß beim Justiervorgang das Joch 28 nicht nachgibt. Der untere Schenkel 23 ist dabei relativ kurz gehalten. Je nach Anordnung des Klappankers 16 kann der Kontaktträger 22 auch mit einem anderen Bereich, z. B. dem Jochbereich an der Grundplatte 11 oder an anderen tragenden Teilen des Relais befestigt werden. Wesentlich ist dabei lediglich, daß Haupt- und Vorkontakt unabhängig voneinander durch die Streckzonen 31 und 32 der sie tragenden Schenkel 24, 26 justierbar sind, wobei die seitlichen Verbindungsstege 29, 30 zur seitlichen Führung sowie teilweise auch zur Stromleitung dienen. Zweckmäßigerweise sind dabei die zwischen den Schenkeln 24 und 26 mit dem Hauptkontakt 21 und dem Vorkontakt 20 liegenden Verbindungsstege 29, 30 mit einem gemeinsamen benachbarten Schenkel 25 verbunden.In the exemplary embodiment, all the legs 23 to 27 of the contact carrier 22 are rigidly connected to one another at their ends facing away from the main contact 21 and pre-contact 20 via the common yoke 28, this yoke 28 being so stably fastened on the base plate 11 via a base plate 33 of the contact carrier 22 that the yoke 28 does not yield during the adjustment process. The lower leg 23 is kept relatively short. Depending on the arrangement of the hinged anchor 16, the contact carrier 22 can also with another area, for. B. the yoke area on the base plate 11 or other supporting parts of the relay. It is only essential that the main and pre-contact can be adjusted independently of one another through the extension zones 31 and 32 of the legs 24, 26 carrying them, the lateral connecting webs 29, 30 serving for lateral guidance and partly also for power conduction. The connecting webs 29, 30 located between the legs 24 and 26 with the main contact 21 and the pre-contact 20 are expediently connected to a common adjacent leg 25.

Claims (2)

  1. Electromagnetic relay having a base plate and contact parts and connecting parts mounted thereon, and having a magnet yoke which supports a coil core, for holding a relay winding, and a hinged armature which is supported on the end of the coil core such that it can pivot and is provided with at least one switching contact which interacts with a stationary normally-open contact of a contact support which is mounted on the base plate, the contact support having at least three limbs, which run side by side spaced apart and originate from a common yoke, in a region which runs in the movement direction of the hinged armature, of which limbs the centre limb supports the normally-open contact at its bent end and is connected to the adjacent limbs by means of connecting webs which project symmetrically on both sides, and the centre limb having an extension zone between the yoke and the connecting webs, for adjustment of the normally-open contact, characterised in that, in addition to the normally-open contact (21) which is used as the main contact, a preliminary contact (20), which interacts with a second switching contact (18) of the hinged armature (16) is arranged on the same contact support (22), on the bent end (26a) of a further centre limb (26) which is connected to in each case one adjacent limb (25, 27) of the common contact support (22) via further connecting webs (30) which project symmetrically on both sides, all the limbs (23 to 27) of the common contact support (22) being rigidly connected to one another at their end facing away from the main contact (21) and the preliminary contact (20), via a common yoke (28).
  2. Electromagnetic relay according to Claim 1, characterised in that the connecting webs (29, 30) which are located between the limbs (24, 26) having the main contact (21) and having the preliminary contact (20) are connected to a common, adjacent limb (25).
EP89909153A 1988-12-10 1989-08-16 Electromagnetic relay Expired - Lifetime EP0447401B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3841667 1988-10-12
DE3841667A DE3841667C1 (en) 1988-12-10 1988-12-10

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EP0447401A1 EP0447401A1 (en) 1991-09-25
EP0447401B1 true EP0447401B1 (en) 1993-11-18

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EP89909153A Expired - Lifetime EP0447401B1 (en) 1988-12-10 1989-08-16 Electromagnetic relay

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US (1) US5155459A (en)
EP (1) EP0447401B1 (en)
JP (1) JPH04502227A (en)
DE (2) DE3841667C1 (en)
WO (1) WO1990006588A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243841C1 (en) * 1992-12-23 1994-01-27 Hella Kg Hueck & Co Electromagnetic relay
DE19522931A1 (en) * 1995-06-23 1997-01-02 Siemens Ag Relays for high switching capacities
DE19544626C2 (en) * 1995-11-30 2002-10-02 Hella Kg Hueck & Co Electromagnetic relay and method for adjusting the pull voltage of the electromagnetic relay
US6229417B1 (en) * 1999-02-23 2001-05-08 Rockwell Technologies, Llc Operator for an electromagnetic switching device
US6771154B1 (en) * 1999-11-12 2004-08-03 Taiko Device, Ltd. Electromagnetic relay
FR2849713B1 (en) 2003-01-06 2006-02-17 Schneider Electric Ind Sas SWITCHING POLE FOR ELECTROMAGNETIC APPARATUS
JP4042784B2 (en) * 2003-02-28 2008-02-06 松下電工株式会社 Contact device
EP1962316A1 (en) * 2007-02-21 2008-08-27 Good Sky Electric Co., Ltd. Electromagnetic relay
JP2012198999A (en) * 2011-03-18 2012-10-18 Fujitsu Component Ltd Composite electromagnetic relay
CN103094008A (en) * 2013-01-25 2013-05-08 浙江兆正机电有限公司 Contact plate of contactor
JP6115198B2 (en) * 2013-03-08 2017-04-19 オムロン株式会社 Electromagnetic relay and manufacturing method thereof

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US3068335A (en) * 1960-06-21 1962-12-11 Litton Systems Inc Dry circuit switch
DE8005773U1 (en) * 1980-03-03 1982-12-02 Robert Bosch Gmbh, 7000 Stuttgart Electrical switching element, preferably electromagnetic switch
DE3012354A1 (en) * 1980-03-29 1981-10-08 Robert Bosch Gmbh, 7000 Stuttgart ELECTRICAL SWITCHING ELEMENT, PREFERABLY ELECTROMAGNETIC SWITCH
DE3640997C1 (en) * 1986-12-01 1987-12-10 Bosch Gmbh Robert Electromagnetic relay
DE3836096C2 (en) * 1988-10-22 1997-06-12 Bosch Gmbh Robert Electromagnetic relay

Also Published As

Publication number Publication date
EP0447401A1 (en) 1991-09-25
JPH04502227A (en) 1992-04-16
DE3841667C1 (en) 1990-02-01
DE58906221D1 (en) 1993-12-23
US5155459A (en) 1992-10-13
WO1990006588A1 (en) 1990-06-14

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