EP0630517B1 - Safety relay with guided contact set and monostable drive - Google Patents

Safety relay with guided contact set and monostable drive Download PDF

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Publication number
EP0630517B1
EP0630517B1 EP94905055A EP94905055A EP0630517B1 EP 0630517 B1 EP0630517 B1 EP 0630517B1 EP 94905055 A EP94905055 A EP 94905055A EP 94905055 A EP94905055 A EP 94905055A EP 0630517 B1 EP0630517 B1 EP 0630517B1
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EP
European Patent Office
Prior art keywords
armature
contact set
longitudinal axis
relay
drive
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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
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EP94905055A
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German (de)
French (fr)
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EP0630517A1 (en
Inventor
Eberhard Kirsch
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Hengstler GmbH
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Hengstler Bauelemente GmbH
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Publication of EP0630517A1 publication Critical patent/EP0630517A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2227—Polarised relays in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion

Definitions

  • the present invention relates to a safety relay according to the preamble of claim 1, as known from EP-A-0 168 058.
  • a forced operation of this contact set means in a manner known per se that the actuator detects all switching springs and either brings them into one position or the other.
  • Such a safety relay has proven itself on a large scale, but it is desirable that the drive is assigned a smaller power consumption and that the known relay is miniaturized overall.
  • the invention is therefore based on the object of developing a safety relay of the type mentioned at the outset so that the entire relay is miniaturized with lower power consumption.
  • the invention is characterized by the technical teaching of claim 1.
  • An essential feature of the invention is that the drive system known per se with a hinged armature is replaced according to the invention by a drive system with an asymmetrically acting H-armature, and that this H-armature with its longitudinal axis is approximately parallel to the longitudinal axis of the drive coil is arranged and that the axis of rotation of this H-armature is arranged perpendicular to the longitudinal axis of the drive coil, and that furthermore the H-armature is magnetically asymmetrical.
  • An H-armature allows a large stroke, which - if the H-armature is magnetically symmetrical - acts symmetrically.
  • a monostable behavior of the relay can be achieved with a magnetically asymmetrical H-armature.
  • a non-polarized relay with a hinged armature does not have this characteristic, because with a hinged armature the initial force is reduced with increasing stroke, i.e. the initial force depends on the stroke, whereas this is not the case with an H anchor.
  • the initial force is the force that is required to bring the contacts of the contact set out of their rest position.
  • the entire components of this relay are first of all built smaller, which, however, with the
  • the disadvantage is that the contact distances between the individual springs also become relatively small, as a result of which the prescribed minimum distances between the contact springs are undershot.
  • Symmetrical H-anchors offer the possibility of achieving long travel distances, but at the same time they cause the drive to behave in a bistable manner. In order to achieve a monostable behavior, the magnetic effect of the H-armature is therefore shifted towards mechanical symmetry. The final forces of the drive become asymmetrical, which results in monostable behavior.
  • Definition of a monostable behavior is that after the drive excitation is omitted, the contact set moves automatically from its working position to its rest position.
  • the essence of the invention is therefore that, with a smaller volume of a safety relay of the type mentioned at the outset, the same contact distances are achieved as are present with a much larger safety relay.
  • the necessary increase in stroke is made possible by using an H-anchor.
  • the relay has a hood 1, which engages over a contact set carrier 2, which accommodates a number of components of the relay as a plastic part made of one piece of material.
  • the complete drive of the relay is latched as a latching part, the drive coil 3 with the yoke legs 4, 5 and the H armature 6 as assembled part can be snapped into the contact set carrier.
  • the yoke legs 4, 5 engage with lateral projections in assigned recesses 13 on the contact set carrier 2 and are locked there.
  • the H-armature has in its axis of rotation 11 a bearing journal, not shown, which also engages in an associated recess in the contact set carrier.
  • part of the contact set carrier 2 is an approximately U-shaped free bearing piece 10, which defines a central recess through which the bearing pin of the H-armature passes and is rotatably supported there.
  • the two yoke legs 4, 5 are bent approximately in a U-shape and lie against one another in the region of the inner coil tube 30, the two end sides of each yoke leg 4, 5 protruding on opposite sides of the drive coil 3.
  • the yoke legs 4, 5 engage in the space between the approximately H-shaped H armature, the H armature consisting essentially of two armature plates 7, 8 arranged parallel to one another, between which a permanent magnet 9 is arranged.
  • the permanent magnet 9 is overmolded together with the armature plates 7, 8, the armature plates being made of a ferromagnetic material.
  • recesses 40, 41 arranged next to the yoke legs 4.5 are arranged in the parts of the armature plates 7, 8 diagonally opposite one another with respect to the axis of rotation , which are filled with a dia- or paramagnetic material 43.
  • This material can e.g. B. be a plastic material or the like.
  • the H-anchor assumes a monostable position, because it pivots in the direction of arrow 31 in the counterclockwise direction about its axis of rotation 11 and engages with the parts of anchor plates 7, 8 opposite the recesses 40, 41 the associated yoke legs 4.5.
  • the resulting curve 36 then intersects the abscissa at position 37, the distance between position 37 and position 33 corresponding to half the difference 44.
  • this curve 36 intersects the straight line 34.
  • the stroke of the H-armature (ie the swivel angle) is now mechanically limited. This limits the high final force at item 45; the curve is broken off at the intersection 38 with the straight line 34 and the drive system has only the residual force 39.
  • This residual force 38 causes that when the H-armature 6 is in the Direction of arrow 31 opposite pivot position that this residual magnetic force 39 acts and this must be overcome by the contact set to reach the rest position.
  • the electromagnetic action of the coil 3 is superimposed on this force-stroke curve of the curve 36.
  • the curve 46 in FIG. 4 shows the resulting force-stroke curve, which acts on the contact set.
  • a final force is also achieved at item 47, which acts on the contact set.
  • the force-stroke curve of the contact set must run in the area between position 37 and curve 46 in order to achieve a monostable behavior of the relay. If the force-stroke curve of the contact set is outside, i.e. within the triangle delimited by pos. 37,38,48, then the behavior of the relay becomes bistable.
  • a plurality of contacts are each arranged in individual chambers that are chambered from one another, the individual chambers being chambered by chamber walls 14 (in the direction of the drive) and by further chamber walls 21, 22, 23.
  • the external limitation is made by the Front wall 24, on the outside of which a restoring spring 17 rests, the spring force of which can be changed with an adjusting screw 18 and which rests on the outside of the actuator 20 with its free, pivotable end.
  • Part of the contact set carrier 2 is a plastic body 15, which covers the yoke legs in the direction of the base plate 25.
  • the contacts 16 are guided in the form of connecting pins 19 through the base plate 25, the base plate 25 being integrally connected to the contact set carrier 2. It is important here that a large creepage distance between the individual adjacent pins 19 according to FIG. 2 is achieved. It is known per se to store the connecting pins in slots, these slots being formed going inwards from the outside of the base plate. This enables simple mounting of the connecting pins 19 in these slots.
  • Coil connections 29 are also arranged on the front side of the contact set carrier 2.
  • a safety relay with a positively driven contact set is thus ensured, in which it is now possible for the first time to still ensure high contact distances with relatively small overall dimensions of the relay, because with the use of the asymmetrically acting H armature, a large stroke of the actuator 20 is achieved and thus large contact distances are made possible.
  • the asymmetrical effect of the H-armature has the advantage that the contacts of the contact set are held in a defined position in the rest position, without the armature reacting on the contact set.
  • Another advantage of the invention is that the use of an asymmetrically acting H-armature 6 does not lead to undesired entrainment of welded contacts, even if the current through the coil 3 of the drive system is increased significantly. This is because even with a substantial increase in the current flow through the coil, the H-armature is only pivoted due to the difference in magnetic fluxes between the opposing armature plates 4, 5. This means that even when high currents are introduced into the coil of the drive system, the drive force on the contacts of the contact set remains limited to a certain value and there is therefore no risk that normally open contacts can also be closed in a welded opener because the drive force is not is sufficient to deform or bend the contact set in such a way that this impermissible state is reached. This is a major advantage of the asymmetrically acting H-anchor, which in conjunction with the described safety concept (positively driven contact set) leads to the success according to the invention.
  • the H-armature 6 has an overhead actuator plate 49, which is connected to the upper anchor plate 7 and against which the actuator 20 rests.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Fluid-Damping Devices (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Relay Circuits (AREA)
  • Push-Button Switches (AREA)
  • Cookers (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Knitting Machines (AREA)
  • Control Of Combustion (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Abstract

A safety relay has a guided contact set and a monostable drive with a H-armature. The individual contacts of the set of contacts are located in separate chambers and are actuated by a common armature. In order to miniaturize the relay while having a low power consumption, a mechanically symmetrical H-armature with an asymmetrical magnetic effect is provided to ensure the monostable drive. The longitudinal axis of the H-armature is approximately parallel to the longitudinal axis of the driving coil and the axis of rotation of the H-armature is perpendicular to the longitudinal axis of the driving coil. The actuator is actuated by an actuating plate which prolongs the H-armature.

Description

Gegenstand der vorliegenden Erfindung ist ein Sicherheitsrelais nach dem Oberbegriff des Patentanspruches 1, wie aus EP-A- 0 168 058 bekannt.The present invention relates to a safety relay according to the preamble of claim 1, as known from EP-A-0 168 058.

Ein derartiges Sicherheitsrelais ist mit mehreren Patenten der Anmelderin bekannt geworden, wobei der Kontaktsatz zwangsgeführt ist und die einzelnen Kontakte gegeneinander abgekammert sind, so daß beim Bruch einer Kontaktfeder es vermieden wird, daß diese Kontaktfeder in die Kammer der benachbarten Kontaktfeder hinein gerät.Such a safety relay has become known with several patents by the applicant, the contact set being positively guided and the individual contacts being locked against one another, so that if a contact spring breaks, it is avoided that this contact spring gets into the chamber of the adjacent contact spring.

Eine Zwangsführung dieses Kontaktsatzes bedeutet in an sich bekannter Weise, daß der Betätiger alle Schaltfedern erfaßt und diese entweder in die eine oder die andere Lage bringt.A forced operation of this contact set means in a manner known per se that the actuator detects all switching springs and either brings them into one position or the other.

Ein derartiges Sicherheitsrelais hat sich in großem Umfang bewährt, es ist aber wünschenswert, daß dem Antrieb eine kleinere Leistungsaufnahme zugeordnet wird und daß insgesamt das bekannte Relais miniaturisiert wird.Such a safety relay has proven itself on a large scale, but it is desirable that the drive is assigned a smaller power consumption and that the known relay is miniaturized overall.

Der Erfindung liegt deshalb die Aufgabe zugrunde, ein Sicherheitsrelais der eingangs genannten Art so weiterzubilden, daß bei kleinerer Leistungsaufnahme eine Miniaturisierung des gesamten Relais gegeben ist.The invention is therefore based on the object of developing a safety relay of the type mentioned at the outset so that the entire relay is miniaturized with lower power consumption.

Zur Lösung der gestellten Aufgabe ist die Erfindung durch die technische Lehre des Anspruches 1 gekennzeichnet.To achieve the object, the invention is characterized by the technical teaching of claim 1.

Wesentliches Merkmal der Erfindung ist, daß nun das an sich bekannte Antriebssystem mit einem Klappanker erfindungsgemäß ersetzt wird durch ein Antriebssystem mit einem asymmetrisch wirkenden H-Anker, und daß dieser H-Anker mit seiner Längsachse etwa parallel zur Längsachse der Antriebsspule angeordnet ist und daß die Drehachse dieses H-Ankers senkrecht zur Längsachse der Antriebsspule angeordnet ist, und daß ferner der H-Anker magnetisch asymmetrisch ausgebildet ist.An essential feature of the invention is that the drive system known per se with a hinged armature is replaced according to the invention by a drive system with an asymmetrically acting H-armature, and that this H-armature with its longitudinal axis is approximately parallel to the longitudinal axis of the drive coil is arranged and that the axis of rotation of this H-armature is arranged perpendicular to the longitudinal axis of the drive coil, and that furthermore the H-armature is magnetically asymmetrical.

Mit der gegebenen technische Lehre ergibt sich nun der wesentliche Vorteil, daß mit einem Relais mit zwangsgeführtem Kontaktsatz, welches wegen der Zwangsführung der Kontakte relativ große Kontaktabstände benötigt und deshalb einen relativ großen Hub des Antriebssystems voraussetzt, diese Voraussetzungen nun durch einen magnetisch asymmetrisch wirkenden H-Anker gewährleistet werden.With the given technical teaching, there is the essential advantage that with a relay with a positively driven contact set, which requires relatively large contact spacings due to the forced guidance of the contacts and therefore requires a relatively large stroke of the drive system, these requirements are now achieved by a magnetically asymmetrically acting H- Anchors are guaranteed.

Ein H-Anker gestattet einen großen Hub, der - sofern der H-Anker magnetisch symmetrisch wirkend ausgebildet ist - symmetrisch wirkt.An H-armature allows a large stroke, which - if the H-armature is magnetically symmetrical - acts symmetrically.

Mit einem magnetisch asymmetrisch wirkenden H-Anker kann ein monostabiles Verhalten des Relais bewirkt werden.A monostable behavior of the relay can be achieved with a magnetically asymmetrical H-armature.

Mit der Verwendung eines H-Ankers besteht der Vorteil, daß eine Kraft-Hub-Kurve erreicht wird, deren Endkräfte unabhängig vom Hub sind.With the use of an H-anchor there is the advantage that a force-stroke curve is achieved, the final forces of which are independent of the stroke.

Ein nicht gepoltes Relais mit einem Klappanker hat diese Charakteristik nicht, denn bei einem Klappanker reduziert sich die Anfangskraft mit größer werdendem Hub, d.h. die Anfangskraft ist von dem Hub abhängig, während dies bei einem H-Anker nicht der Fall ist.A non-polarized relay with a hinged armature does not have this characteristic, because with a hinged armature the initial force is reduced with increasing stroke, i.e. the initial force depends on the stroke, whereas this is not the case with an H anchor.

Die Anfangskraft ist hierbei die Kraft, die benötigt wird, die Kontakte des Kontaktsatzes aus ihrer Ruhelage zu bringen. Um ein derartiges Relais in seinem Gesamtvolumen miniaturisieren zu können werden zunächst einmal die gesamten Komponenten dieses Relais kleiner gebaut, was allerdings mit dem Nachteil verbunden ist, daß auch die Kontaktabstände zwischen den einzelnen Federn relativ klein werden, wodurch die vorgeschriebenen Mindestabstände zwischen den Kontaktfedern unterschritten werden. Hier ist es aber Voraussetzung, daß man einen großen Kontaktabstand einhält, was einen großen Hub vom Antriebssystem verlangt.The initial force is the force that is required to bring the contacts of the contact set out of their rest position. In order to be able to miniaturize such a relay in its total volume, the entire components of this relay are first of all built smaller, which, however, with the The disadvantage is that the contact distances between the individual springs also become relatively small, as a result of which the prescribed minimum distances between the contact springs are undershot. Here, however, it is a prerequisite that one maintains a large contact distance, which requires a large stroke from the drive system.

Symmetrische H-Anker bieten die Möglichkeit große Hubwege zu erreichen, sie bewirken aber gleichzeitig ein bistabiles Verhalten des Antriebes. Um ein monostabiles Verhalten zu erreichen, wird deshalb erfindungsgemäß der H-Anker in seiner magnetischen Wirkung zur mechanischen Symmetrie verschoben. Die Endkräfte des Antriebes werden damit asymmetrisch, wodurch ein monostabiles Verhalten erreicht wird.Symmetrical H-anchors offer the possibility of achieving long travel distances, but at the same time they cause the drive to behave in a bistable manner. In order to achieve a monostable behavior, the magnetic effect of the H-armature is therefore shifted towards mechanical symmetry. The final forces of the drive become asymmetrical, which results in monostable behavior.

Definition eines monostabilen Verhaltens ist, daß nach Weglassen der Antriebserregung der Kontaktsatz sich selbsttätig aus der Arbeitslage in seine Ruhelage bewegt.Definition of a monostable behavior is that after the drive excitation is omitted, the contact set moves automatically from its working position to its rest position.

Das Wesen der Erfindung liegt also darin, daß man bei einem kleineren Volumen eines Sicherheitsrelais der eingangs genannten Art trotzdem die gleichen Kontaktabstände erreicht, wie sie bei einem wesentlich größeren Sicherheitsrelais vorhanden sind. Die damit notwendige Vergrößerung des Hubes wird durch die Verwendung eines H-Ankers ermöglicht.The essence of the invention is therefore that, with a smaller volume of a safety relay of the type mentioned at the outset, the same contact distances are achieved as are present with a much larger safety relay. The necessary increase in stroke is made possible by using an H-anchor.

Im folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellenden Zeichnungen näher erläutert. Hierbei gehen aus den Zeichnungen und ihrer Beschreibung weitere erfindungswesentliche Merkmale und Vorteile der Erfindung hervor.The invention is explained in more detail below with the aid of drawings which illustrate only one embodiment. Here, from the drawings and their description, further features and advantages of the invention that are essential to the invention emerge.

Es zeigen:

Figur 1:
schematisiert einen Schnitt durch ein Relais nach der Erfindung;
Figur 2:
die Draufsicht auf die Bodenplatte des Relais;
Figur 3:
schematisiert eine Draufsicht auf den H-Anker;
Figur 4:
das Antriebskraft-Hub-Diagramm für verschiedene H-Anker-Ausführungen.
Show it:
Figure 1:
schematized a section through a relay according to the invention;
Figure 2:
the top view of the base plate of the relay;
Figure 3:
schematized a top view of the H-anchor;
Figure 4:
the driving force-stroke diagram for different H-anchor designs.

Bezüglich der Erläuterung der Funktions eines Sicherheitsrelais nach der Erfindung wird auf die älteren Patente des gleichen Anmelders hingewiesen. Die dortige Offenbarung soll vollinhaltlich von der vorliegenden Offenbarung umfaßt sein.With regard to the explanation of the function of a safety relay according to the invention, reference is made to the older patents of the same applicant. The disclosure there is intended to be fully encompassed by the present disclosure.

Das Relais weist eine Haube 1 auf, die einen Kontaktsatzträger 2 übergreift, der als werkstoffeinstückiges Kunststoffteil eine Reihe von Komponenten des Relais aufnimmt.The relay has a hood 1, which engages over a contact set carrier 2, which accommodates a number of components of the relay as a plastic part made of one piece of material.

In den Kontaktsatzträger 2 wird der komplette Antrieb des Relais als Rastteil eingerastet, wobei die Antriebsspule 3 mit den Jochschenkeln 4,5 und dem H-Anker 6 als zusammengesetztes Teil in den Kontaktsatzträger eingerastet werden. Hierbei greifen die Jochschenkel 4,5 mit seitlichen Ansätzen in zugeordnete Ausnehmungen 13 am Kontaktsatzträger 2 ein und sind dort verrastet.In the contact set carrier 2, the complete drive of the relay is latched as a latching part, the drive coil 3 with the yoke legs 4, 5 and the H armature 6 as assembled part can be snapped into the contact set carrier. In this case, the yoke legs 4, 5 engage with lateral projections in assigned recesses 13 on the contact set carrier 2 and are locked there.

Der H-Anker hat in seiner Drehachse 11 einen nicht näher dargestellten Lagerzapfen, welcher ebenfalls in eine zugeordnete Ausnehmung im Kontaktsatzträger eingreift. Hierbei ist Teil des Kontaktsatzträgers 2 ein etwa U-förmig freigestelltes Lagerstück 10, welches eine mittlere Ausnehmung definiert, durch welche der Lagerzapfen des H-Ankers hindurchgreift und dort drehbar gelagert ist.The H-armature has in its axis of rotation 11 a bearing journal, not shown, which also engages in an associated recess in the contact set carrier. Here, part of the contact set carrier 2 is an approximately U-shaped free bearing piece 10, which defines a central recess through which the bearing pin of the H-armature passes and is rotatably supported there.

Die beiden Jochschenkel 4,5 sind etwa U-förmig gebogen und liegen aneinander im Bereich des Spuleninnenrohres 30 an, wobei die beiden Endseiten jedes Jochschenkels 4,5 an einander gegenüberliegenden Seiten der Antriebsspule 3 herausragen.The two yoke legs 4, 5 are bent approximately in a U-shape and lie against one another in the region of the inner coil tube 30, the two end sides of each yoke leg 4, 5 protruding on opposite sides of the drive coil 3.

Gemäß der Figur 3 greifen die Jochschenkel 4,5 in den Zwischenraum des etwa H-förmig profilierten H-Ankers ein, wobei der H-Anker im wesentlichen aus zwei parallel zueinander angeordneten Ankerplatten 7,8 besteht, zwischen denen ein Permanentmagnet 9 angeordnet ist. Der Permanentmagnet 9 ist zusammen mit den Ankerplatten 7,8 umspritzt, wobei die Ankerplatten aus einem ferromagnetischen Material bestehen.According to FIG. 3, the yoke legs 4, 5 engage in the space between the approximately H-shaped H armature, the H armature consisting essentially of two armature plates 7, 8 arranged parallel to one another, between which a permanent magnet 9 is arranged. The permanent magnet 9 is overmolded together with the armature plates 7, 8, the armature plates being made of a ferromagnetic material.

Die Kraft-Hub-Kennlinie eines symmetrischen H-Ankers ist mit der Kurve 32 in dem Diagramm nach Fig. 4 dargestellt. Hierbei ergibt sich, daß in den Endlagen die erreichbaren Endkräfte gleich groß und maximal sind, wobei der Gesamthub des H-Ankers durch die Ordinate des Diagramms einerseits und durch die Gerade 34 andererseits definiert ist.The force-stroke characteristic of a symmetrical H-armature is shown by curve 32 in the diagram according to FIG. 4. The result is that in the end positions the achievable end forces are of the same size and maximum, the total stroke of the H-armature being defined on the one hand by the ordinate of the diagram and by the straight line 34 on the other hand.

Bei Pos. 33 erfolgt der Schnittpunkt mit der Abzisse. In diesem Punkt ist die Antriebskraft gleich Null.At pos. 33 there is the intersection with the abscissa. In at this point the driving force is zero.

Um nun den an sich symmetrisch wirkenden H-Anker 6 unter Beibehaltung seiner mechanischen Symmetrie asymmetrisch wirken zu lassen, werden erfindungsgemäß in die diagonal bezüglich der Drehachse einander gegenüberliegenden Teile der Ankerplatten 7,8 nächst den Jochschenkeln 4,5 angeordnete Ausnehmungen 40,41 angeordnet sind, die mit einem dia- oder paramagnetischen Werkstoff 43 gefüllt sind. Dieser Werkstoff kann z. B. ein Kunststoffmaterial oder dgl. sein. Aufgrund dieser Asymmetrie diagonal einander gegenüberliegender Ankerplatten 7,8 nimmt der H-Anker eine monostabile Lage ein, denn er verschwenkt in Pfeilrichtung 31 im Gegenuhrzeigersinn um seine Drehachse 11 und legt sich mit den den Ausnehmungen 40,41 gegenüberliegenden Teilen der Ankerplatten 7,8 an den zugeordneten Jochschenkeln 4,5 an.In order to have the symmetrical-acting H-armature 6 appear asymmetrical while maintaining its mechanical symmetry, recesses 40, 41 arranged next to the yoke legs 4.5 are arranged in the parts of the armature plates 7, 8 diagonally opposite one another with respect to the axis of rotation , which are filled with a dia- or paramagnetic material 43. This material can e.g. B. be a plastic material or the like. Because of this asymmetry of diagonally opposite anchor plates 7, 8, the H-anchor assumes a monostable position, because it pivots in the direction of arrow 31 in the counterclockwise direction about its axis of rotation 11 and engages with the parts of anchor plates 7, 8 opposite the recesses 40, 41 the associated yoke legs 4.5.

Im Diagramm der Figur 4 bedeutet dies, daß aufgrund der Asymmetrie nach Figur 3 der Hub des Antriebssystems um die Differenz 44 zwischen den Geraden 34,35 magnetisch verlängert wird.In the diagram in FIG. 4, this means that, due to the asymmetry according to FIG. 3, the stroke of the drive system is magnetically extended by the difference 44 between the straight lines 34, 35.

Die sich dadurch ergebende Kurve 36 schneidet dann bei Pos. 37 die Abzisse, wobei der Abstand zwischen der Pos. 37 und der Pos. 33 der Hälfte der Differenz 44 entspricht.The resulting curve 36 then intersects the abscissa at position 37, the distance between position 37 and position 33 corresponding to half the difference 44.

Im Schnittpunkt 38 schneidet diese Kurve 36 die Gerade 34.At the intersection 38, this curve 36 intersects the straight line 34.

Erfindungsgemäß wird nun der Hub des H-Ankers (d.h. der Schwenkwinkel) mechanisch begrenzt. Damit wird die an sich vorhandene hohe Endkraft bei Pos. 45 begrenzt; die Kurve wird im Schnittpunkt 38 mit der Geraden 34 abgebrochen und das Antriebssystem hat nur noch die Restkraft 39. Diese Restkraft 38 bewirkt, daß, wenn man den H-Anker 6 in der der Pfeilrichtung 31 entgegen gesetzten Schwenklage bringt, daß diese magnetische Restkraft 39 wirkt und muß diese vom Kontaktsatz zum Erreichen der Ruhelage überwunden werden.According to the invention, the stroke of the H-armature (ie the swivel angle) is now mechanically limited. This limits the high final force at item 45; the curve is broken off at the intersection 38 with the straight line 34 and the drive system has only the residual force 39. This residual force 38 causes that when the H-armature 6 is in the Direction of arrow 31 opposite pivot position that this residual magnetic force 39 acts and this must be overcome by the contact set to reach the rest position.

Wenn man das Relais also in die Arbeitslage entgegen der Pfeilrichtung 31 bringen will, verbleibt eine Restkraft 39, welche versucht, diese Arbeitslage aufrechtzuerhalten und deshalb vom Kontaktsatz überwunden werden muß. Wenn diese Kraft zu groß werden würde, wäre das Relais bistabil. Man versucht, diese Restkraft 39 klein zu machen, bekommt sie jedoch nicht auf Null, weil andernfalls der Hub u.a. zu stark reduziert würde.If you want to bring the relay into the working position against the direction of arrow 31, there remains a residual force 39 which tries to maintain this working position and must therefore be overcome by the contact set. If this force were to become too great, the relay would be bistable. You try to make this residual force 39 small, but you don't get it to zero, because otherwise the stroke, etc. would be reduced too much.

Diesem Kraft-Hub-Verlauf der Kurve 36 wird die elektromagnetische Wirkung der Spule 3 überlagert. Die Kurve 46 in Fig. 4 zeigt den resultierenden Kraft-Hub-Verlauf, welcher auf den Kontaktsatz wirkt. Bei Pos. 47 wird ebenfalls eine Endkraft erreicht, die auf den Kontaktsatz wirkt. Der Kraft-Hub-Verlauf des Kontaktsatzes muß im Bereich zwischen der Position 37 und der Kurve 46 verlaufen, um ein monostabiles Verhalten des Relais zu erreichen. Liegt der Kraft-Hub-Verlauf des Kontaktsatzes außerhalb, d.h. innerhalb des durch die Pos. 37,38,48 begrenzten Dreieckes, dann wird das Verhalten des Relais bistabil.The electromagnetic action of the coil 3 is superimposed on this force-stroke curve of the curve 36. The curve 46 in FIG. 4 shows the resulting force-stroke curve, which acts on the contact set. A final force is also achieved at item 47, which acts on the contact set. The force-stroke curve of the contact set must run in the area between position 37 and curve 46 in order to achieve a monostable behavior of the relay. If the force-stroke curve of the contact set is outside, i.e. within the triangle delimited by pos. 37,38,48, then the behavior of the relay becomes bistable.

Beim Verschwenken des H-Ankers aus seiner Ruhelage in die vom Antriebssystem bewirkte Arbeitslage wird somit der Betätiger 20 in Figur 1 nach oben bewegt und schaltet die einzelnen Kontakte des Kontaktsatzes 16.When the H-armature is pivoted out of its rest position into the working position brought about by the drive system, the actuator 20 is thus moved upward in FIG. 1 and switches the individual contacts of the contact set 16.

Hierbei sind mehrere Kontakte jeweils in einzelnen, voneinander abgekammerten Kammern angeordnet, wobei die einzelnen Kammern durch Kammerwände 14 (in Richtung zum Antrieb) und durch weitere Kammerwände 21,22,23 abgekammert sind. Die äußere Begrenzung erfolgt durch die Stirnwand 24, an deren Außenseite eine Rückstellfeder 17 anliegt, die mit einer Justierschraube 18 in ihrer Federkraft verändert werden kann und die mit ihrem freien, schwenkbaren Ende an der Außenseite des Betätigers 20 anliegt.In this case, a plurality of contacts are each arranged in individual chambers that are chambered from one another, the individual chambers being chambered by chamber walls 14 (in the direction of the drive) and by further chamber walls 21, 22, 23. The external limitation is made by the Front wall 24, on the outside of which a restoring spring 17 rests, the spring force of which can be changed with an adjusting screw 18 and which rests on the outside of the actuator 20 with its free, pivotable end.

Bestandteil des Kontaktsatzträgers 2 ist im übrigen ein Kunststoffkörper 15, der die Jochschenkel in Richtung zur Bodenplatte 25 abdeckt.Part of the contact set carrier 2 is a plastic body 15, which covers the yoke legs in the direction of the base plate 25.

Die Kontakte 16 sind in Form von Anschlußstiften 19 durch die Bodenplatte 25 hindurchgeführt, wobei die Bodenplatte 25 werkstoffeinstückig mit dem Kontaktsatzträger 2 verbunden ist. Wichtig hierbei ist, daß eine große Kriechstrecke zwischen den einzelnen nebeneinanderliegenden Anschlußstiften 19 gemäß Figur 2 erreicht wird. Hierbei ist es an sich bekannt, die Anschlußstifte in Schlitzen zu lagern, wobei diese Schlitze von der Außenseite der Bodenplatte nach innen gehend ausgebildet sind. Dies ermöglicht eine einfache Montage der Anschlußstifte 19 in diesen Schlitzen.The contacts 16 are guided in the form of connecting pins 19 through the base plate 25, the base plate 25 being integrally connected to the contact set carrier 2. It is important here that a large creepage distance between the individual adjacent pins 19 according to FIG. 2 is achieved. It is known per se to store the connecting pins in slots, these slots being formed going inwards from the outside of the base plate. This enables simple mounting of the connecting pins 19 in these slots.

An der vorderen Seite des Kontaktsatzträgers 2 sind im übrigen noch Spulenanschlüsse 29 angeordnet.Coil connections 29 are also arranged on the front side of the contact set carrier 2.

Mit der erfindungssgemäßen technischen Lehre wird also ein Sicherheitsrelais mit zwangsgeführtem Kontaktsatz gewährleistet, bei dem es nun erstmals möglich ist, mit relativ kleinen Gesamtabmessungen des Relais trotzdem hohe Kontaktabstände zu gewährleisten, weil mit der Verwendung des asymmetrisch wirkenden H-Ankers ein großer Hub des Betätigers 20 erzielt wird und dadurch große Kontaktabstände ermöglichst werden. Die asymmetrische Wirkung des H-Ankers hat den Vorteil, daß in der Ruhelage die Kontakte des Kontaktsatzes in einer definierten Stellung gehalten werden, ohne Rückwirkungen des Ankers auf den Kontaktsatz.With the technical teaching according to the invention, a safety relay with a positively driven contact set is thus ensured, in which it is now possible for the first time to still ensure high contact distances with relatively small overall dimensions of the relay, because with the use of the asymmetrically acting H armature, a large stroke of the actuator 20 is achieved and thus large contact distances are made possible. The asymmetrical effect of the H-armature has the advantage that the contacts of the contact set are held in a defined position in the rest position, without the armature reacting on the contact set.

Ein weiterer Vorteil der Erfindung liegt darin, daß durch die Verwendung eines asymmetrisch wirkenden H-Ankers 6 es nicht zu einer unerwünschten Mitnahme von verschweißten Kontakten kommt, auch wenn der Strom durch die Spule 3 des Antriebssystems wesentlich erhöht wird. Dies liegt daran, daß auch bei wesentlicher Steigerung des Stromflußes durch die Spule der H-Anker nur verschwenkt wird aufgrund der Differenz der Magnetflüsse zwischen den einander gegenüberliegenden Ankerplatten 4,5. Das führt dazu, daß auch bei Einleitung hoher Ströme in die Spule des Antriebssystems die Antriebskraft auf die Kontakte des Kontaktsatzes auf einen bestimmten Wert begrenzt bleibt und damit nicht die Gefahr besteht, daß bei einem verschweißten Öffner auch Schließer geschlossen werden können, weil die Antriebskraft nicht ausreicht, den Kontaktsatz in sich so zu deformieren oder zu verbiegen, daß dieser unzulässige Zustand erreicht wird. Dies ist ein wesentlicher Vorteil des asymmetrisch wirkenden H-Ankers, der in Verbindung mit dem beschriebenen Sicherheitskonzept (zwangsgeführter Kontaktsatz) zu dem erfindungsgemäßen Erfolg führt.Another advantage of the invention is that the use of an asymmetrically acting H-armature 6 does not lead to undesired entrainment of welded contacts, even if the current through the coil 3 of the drive system is increased significantly. This is because even with a substantial increase in the current flow through the coil, the H-armature is only pivoted due to the difference in magnetic fluxes between the opposing armature plates 4, 5. This means that even when high currents are introduced into the coil of the drive system, the drive force on the contacts of the contact set remains limited to a certain value and there is therefore no risk that normally open contacts can also be closed in a welded opener because the drive force is not is sufficient to deform or bend the contact set in such a way that this impermissible state is reached. This is a major advantage of the asymmetrically acting H-anchor, which in conjunction with the described safety concept (positively driven contact set) leads to the success according to the invention.

Im übrigen weist der H-Anker 6 eine oben liegende Betätigerplatte 49 auf, die mit der oberen Ankerplatte 7 verbunden ist und an welcher der Betätiger 20 anliegt.For the rest, the H-armature 6 has an overhead actuator plate 49, which is connected to the upper anchor plate 7 and against which the actuator 20 rests.

ZEICHNUNGS-LEGENDEDRAWING LEGEND

11
HaubeHood
22nd
KontaktsatzträgerContact set carrier
33rd
AntriebsspuleDrive coil
44th
JochschenkelYoke leg
55
JochschenkelYoke leg
66
H-AnkerH anchor
77
AnkerplatteAnchor plate
88th
AnkerplatteAnchor plate
99
PermanentmagnetPermanent magnet
1010th
LagerstückStock
1111
DrehachseAxis of rotation
1313
AusnehmungRecess
1414
KammerwandChamber wall
1515
KunststoffkörperPlastic body
1616
KontaktsatzContact set
1717th
RückstellfederReturn spring
1818th
JustierschraubeAdjusting screw
1919th
AnschlußstiftConnector pin
2020th
BetätigerActuator
2121
KammerwandChamber wall
2222
KammerwandChamber wall
2323
KammerwandChamber wall
2424th
StirnwandFront wall
2525th
BodenplatteBase plate
2828
geschlossene Schlitzabdeckungclosed slot cover
2929
SpulenanschlußCoil connection
3030th
SpuleninnenrohrCoil inner tube
3131
PfeilrichtungArrow direction
3232
KurveCurve
3333
Positionposition
3434
GeradeJust
3535
GeradeJust
3636
KurveCurve
3737
Positionposition
3838
SchnittpunktIntersection
3939
RestkraftResidual force
4040
AusnehmungRecess
4141
AusnehmungRecess
4343
Werkstoffmaterial
4444
Differenzdifference
4545
Positionposition
4646
KurveCurve
4747
Positionposition
4848
Positionposition
4949
BetätigerplatteActuator plate

Claims (1)

  1. A safety relay with an automatically guided contact set and poled monostable drive, in which the individual contact spring sets (16) are compartmentalized with respect to each other, and an H-armature (6) is provided for driving, which is arranged with its longitudinal axis approximately parallel to the longitudinal axis of the drive coil (4) and the rotation axis (11) of which is perpendicular to the longitudinal axis of the drive coil (3), characterised in that the H-armature (6) is constructed so as to be mechanically symmetrical through two armature plates (7, 8) arranged parallel to each other, between which yoke shanks (4,5) engage, and so as to be magnetically asymmetrical through arrangement of a permanent magnet (9) between the armature plates (7,8), and the H-armature is mounted rotatably in an approximately U-shaped bearing piece (10) defined by the contact set carrier (2) and asymmetrically, in diagonally opposite parts of the armature plates (7, 8) recesses (40, 41) are provided, which have a dia- or paramagnetic material, in which the actuator (20) is moved by an actuator plate (49) arranged in an extension of the H-armature (6) and actuates the contact spring sets (16) jointly.
EP94905055A 1993-01-13 1994-01-13 Safety relay with guided contact set and monostable drive Expired - Lifetime EP0630517B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4300594 1993-01-13
DE4300594A DE4300594A1 (en) 1993-01-13 1993-01-13 Safety relay with positively driven contact set and monostable drive
PCT/EP1994/000089 WO1994016456A1 (en) 1993-01-13 1994-01-13 Safety relay with guided contact set and monostable drive

Publications (2)

Publication Number Publication Date
EP0630517A1 EP0630517A1 (en) 1994-12-28
EP0630517B1 true EP0630517B1 (en) 1997-07-16

Family

ID=6478035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94905055A Expired - Lifetime EP0630517B1 (en) 1993-01-13 1994-01-13 Safety relay with guided contact set and monostable drive

Country Status (8)

Country Link
US (1) US5568108A (en)
EP (1) EP0630517B1 (en)
JP (1) JP3388473B2 (en)
AT (1) ATE155609T1 (en)
CA (1) CA2131889A1 (en)
DE (2) DE4300594A1 (en)
DK (1) DK0630517T3 (en)
WO (1) WO1994016456A1 (en)

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DE19847831C2 (en) * 1998-10-16 2002-11-21 Tyco Electronics Austria Gmbh safety relay
EP1120806B1 (en) 2000-01-28 2013-11-13 ELESTA relays GmbH Safety relay, the use of such a relay and switching device with it
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EP1284492A3 (en) * 2001-08-16 2004-11-24 Tyco Electronics AMP GmbH Electromagnetic relay and method for accurate positioning of its magnetic coil
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Also Published As

Publication number Publication date
DE4300594A1 (en) 1994-07-14
JP3388473B2 (en) 2003-03-24
DE59403362D1 (en) 1997-08-21
WO1994016456A1 (en) 1994-07-21
DK0630517T3 (en) 1998-02-09
JPH07504780A (en) 1995-05-25
ATE155609T1 (en) 1997-08-15
CA2131889A1 (en) 1994-07-21
EP0630517A1 (en) 1994-12-28
US5568108A (en) 1996-10-22

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