EP0185262A1 - Lifting magnet - Google Patents

Lifting magnet Download PDF

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Publication number
EP0185262A1
EP0185262A1 EP19850115476 EP85115476A EP0185262A1 EP 0185262 A1 EP0185262 A1 EP 0185262A1 EP 19850115476 EP19850115476 EP 19850115476 EP 85115476 A EP85115476 A EP 85115476A EP 0185262 A1 EP0185262 A1 EP 0185262A1
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EP
European Patent Office
Prior art keywords
armature
frame
winding
yoke
magnetic frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19850115476
Other languages
German (de)
French (fr)
Other versions
EP0185262B1 (en
Inventor
Dietmar Dipl.-Kfm. Harting
Hans Dipl.-Ing. Nagel
Günther Rose
Ernst-Heinrich Dipl.-Ing. Harting
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Harting Electronics GmbH and Co KG
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Harting Electronics GmbH and Co KG
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Publication date
Application filed by Harting Electronics GmbH and Co KG filed Critical Harting Electronics GmbH and Co KG
Priority to AT85115476T priority Critical patent/ATE44188T1/en
Publication of EP0185262A1 publication Critical patent/EP0185262A1/en
Application granted granted Critical
Publication of EP0185262B1 publication Critical patent/EP0185262B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions

Definitions

  • the invention relates to a lifting magnet with a frame-shaped yoke that forms the magnetic yoke to the armature, and a winding support, which carries the excitation winding and is inserted into the yoke, in which the axially displaceable armature is guided, and an armature counter-pole arranged at the bottom of the yoke part is partially dipped into the winding carrier, and a method for producing such a solenoid.
  • Such solenoids are used to drive mechanical actuators, the armature being pulled out of an initial position against the armature counter-pole when the excitation winding of the solenoid is energized and thereby actuating the actuator.
  • the armature in the initial position is generally done by a spring force when the excitation current is switched off.
  • Lifting magnets of the type described in the introduction are generally known.
  • a U-shaped yoke is provided, a pole core (armature opposite pole) being riveted into the yoke bottom.
  • the pole core also serves to centrally hold and guide the winding support.
  • the winding support is inserted into the U-shaped yoke and a cover plate is provided which is provided with a central bore, pushed over a collar of the winding support and connected / riveted to the ends of the yoke side parts.
  • the cover plate is oriented towards the yoke via recesses on the yoke side parts, the depth of which corresponds to the thickness of the cover plate.
  • the invention is based on the object, while avoiding the disadvantages explained above, of creating a lifting magnet which consists of only a few details, can be produced more cost-effectively and largely corresponds to the known designs and sizes in terms of achievable lifting work and characteristic curve.
  • the yoke is designed as a one-piece magnetic frame and is formed as a stamped and bent part from a sheet metal blank. Further advantageous embodiments of the invention are explained in more detail in claims 2 to 7.
  • Another object of the invention is to address a method by means of which such a lifting magnet can be manufactured inexpensively.
  • This object is achieved in that a magnetic frame is used, the upper ends of which are bent at right angles to the side parts (yoke legs) and the side parts are pre-bent to such an extent that the winding support can still be inserted into the frame such that the magnetic frame with the inserted winding support is in one Mounting device is used that the side parts are bent into their final, right-angled position the free ends of the magnetic frame with semicircular recesses provided for this purpose encompass the upper collar of the winding support and thereby come into mutual contact, and that the ends of the magnetic frame are connected to one another by a welding process (arc, laser welding, etc.). Further advantageous embodiments of a manufacturing method are explained in more detail in claims 9 and 10.
  • the advantages achieved by the invention are, in particular, that when the "active" iron circle of the lifting magnet is designed as a one-piece magnetic frame, the joining gaps that were always present in the previously used riveted cover plates are completely eliminated.
  • the anchor opposite pole is shaped as a dome or passage stamped out of the material of the yoke base, the riveting of the core pole piece is also omitted, whereby joining gaps are also completely avoided here.
  • the one-piece design of the magnetic frame and the armature counterpole always ensures the exact central position of the armature counterpole and is no longer dependent on the manufacturing-related center deviations of the core attachment or riveting accuracy. Manufacturing-related misalignments with the eccentric position of the rivet attachment of the armature counterpole, as well as with oblique riveting of the armature counterpole, are completely eliminated.
  • the lifting magnet according to the invention can be designed completely in accordance with the designs used to date and has the same characteristic operating data (interchangeability) - but can be produced much more cost-effectively.
  • the operating characteristics can be maintained much more uniformly, without having to use complex assembly and control devices.
  • the specified manufacturing process reduces the manufacturing process to just a few operations can also be carried out without complex assembly gauges etc.
  • the lifting magnet essentially consists of a U-shaped yoke 1 with a pole core 3 riveted into the yoke base 2.
  • the pole core is here, for example, provided with a conical recess 4 into which the likewise conical end 5 of the magnet armature 6 is immersed in the armature end position.
  • the winding carrier 8 provided with the excitation winding 7 is inserted into the U-shaped yoke, the latter being pushed over the pole core 3 at its lower end ben and is guided and held centrally here.
  • the winding support is provided with a round, central through opening in which the axially displaceable armature 6 is also arranged and guided.
  • a flange 9 is provided, which is provided with a collar 10.
  • a metallic cover plate 11 is provided, in the central opening of which the collar is immersed.
  • the cover plate is connected to the yoke legs 12 by riveting 13.
  • the cover plate is oriented towards the yoke via recesses in the yoke, the depth of which corresponds to the thickness of the cover plate.
  • FIGS. 1A, B a lifting magnet according to the invention is shown.
  • magnetic frame 14 simultaneously fulfills the functions of yoke 1, cover plate 11 and pole core 3 of the known type according to FIG. 1.
  • FIGS. 1A, B are entered here, but are provided with an index.
  • the one-piece holding frame 14 is bent around the winding support 8, the pole core 3 'being immersed at the lower end of the winding support and holding it centrally here.
  • the pole core is designed as a cylindrical sheet metal passage stamped out of the material of the holding frame.
  • the angled ends 15 of the holding frame engage over the flange 9 of the winding support.
  • the ends are provided with semicircular recesses 16 and encompass the collar 10 of the winding support.
  • locking hooks 17 are formed on the ends of the holding frame, which in locking recesses 18 in Engage the flange of the winding carrier and prevent the holding frame from springing back after bending over the winding carrier.
  • the pole core 3 'shown in FIG. 2 is designed as an open passage in the form of a hollow cylinder into which the armature 6 is immersed with its stepped conical end 5'.
  • the characteristic of the magnet system is determined by the cone angle ⁇ . With this pair of poles, primarily lifting force characteristic curves with a high initial force are generated, the characteristic curve shape being able to be varied within a wide range by changing the cone angle d.
  • FIG. 6.7 Another design of the pole core 3 "is shown in the sheet metal blank according to FIG. 6.7.
  • a round dome 19 with a flat, closed surface 20 is stamped out of the material of the magnetic frame.
  • an anchor with a flat pole end it points such a magnet system has an increasing lifting force characteristic with high final forces.
  • pole core 3 "' is shown in the sheet metal blank according to FIGS. 8, 9.
  • the pole core 3"' is conical.
  • the pole core is formed from the material of the yoke base 2 'by an embossing process.
  • the conical pole core is provided with an annular step 26. The surface of the step formed in this way serves as a stop surface for the front annular surface 27 of the magnet armature 6 'shown in FIG.
  • the conical pole core 3 "' being immersed in the corresponding conical recess 28 when the armature is supported on this step
  • the cone of the armature and the pole core, and the arrangement of the step, are matched to one another in such a way that a small air gap remains between the cone surfaces
  • the part 29 of the pole core cone located below the step serves to center the winding carrier when it is inserted into the holding frame and ensures it a central position of the winding support and thus a central run of the armature to the core.
  • the magnetic frame 14 is made from a sheet metal blank, the shape of which is shown in FIGS. 4, 5; 6,7 and 8, 9 can be seen. It is preferably provided to create the magnetic frame as a stamped and bent part. 4 to 9, the sheet metal blank is punched out and the locking hooks 17 are cut out and bent out of the plane.
  • the pole core 3 ', 3 ", 3"' is either as an open, cylindrical sheet metal passage (Fig. 4, 5), as a closed, cylindrical dome 19 (Fig. 6, 7) or as a conical Embossing (Fig. 8, 9).
  • the bending lines 21 for the subsequent bending and shaping of the final holding frame are also indicated by dash-dotted lines.
  • Recesses 22 are provided, which are arranged so that gripping arms (claws) of the mounting device explained in more detail below can engage in them. These recesses are so arranged on the bending edges between the yoke base and yoke legs that the recesses are located in the yoke legs (side parts) after bending the holding frame and the gripping devices (kiauen) can act directly on the yoke base.
  • a magnetic frame 14 is provided, the upper ends 15 of which are already bent at right angles with respect to the side legs (yoke legs 12), while the side legs are only pre-bent with respect to the yoke base 2 'or the axis of the magnet system so that straight it is also possible to plug the winding carrier 8 onto the pole core 3 ', 3 "or 3"'.
  • the lifting magnet which has been prefabricated so far is inserted into an assembly device, the magnetic frame 14 then being located in a die 23 with the contour 24 indicated by dash-dotted lines.
  • Two claws 25 then engage in the recesses 22 of the holding frame and pull / push it with the forces F into the die.
  • the recesses in the yoke legs are arranged so that the claws act directly on the yoke base 2 '.
  • the yoke legs are then pivoted inward (direction of arrow a) and their angled ends 15 pass over the upper flange 9 of the winding support.
  • the semicircular recesses 16 encompass the collar 10 of the winding carrier and at the same time the latching hooks 17 of the holding frame come into engagement with the latching recesses 18 of the winding carrier flange 9. A firm bond is thus produced between the magnetic frame and the winding carrier.
  • the magnet system thus completed is then removed from the assembly tool and the magnet armature inserted.

Abstract

1. Lifting magnet (solenoid mechanism) with a frame-shaped yoke (1') forming the magnetic return to the armature and a winding carrier (8) incorporated within the yoke (1') and carrying the exciter winding (7), in which winding carrier (8) is located the axially movable armature (6), wherein an armature antipole (3) arranged at the bottom (2') of the yoke element (1') partially engages in the winding carrier (8), said yoke (1') being designed as a single-piece magnet frame (14) and formed as a punched and bent element from a plate blank, the angled ends (15) of which magnet frame (14) are provided with semi-circular recesses (16) which engage around the collar (10) of the winding carrier (8), characterized in that on the inward faces of the angled ends (15) of the magnetic frame (14) are located retaining lugs (17) which engage with corresponding recesses (18) formed in the top flange (9) of the winding carrier (8) when the side portions of the magnet frame are bent over the previously inserted winding carrier (8).

Description

Die Erfindung betrifft einen Hubmagneten mit einem, den magnetischen Rückschluß zum Anker bildenden, rahmenförmigen Joch, sowie einem in das Joch eingefügten, die Erregerwicklung tragenden Wicklungsträger, in dem der axial verschiebbare Anker geführt ist und wobei ein am Boden des Jochteiles angeordneter Anker-Gegenpol teilweise in den Wicklungsträger eintaucht, sowie ein Verfahren zur Herstellung eines derartigen Hubmagneten.The invention relates to a lifting magnet with a frame-shaped yoke that forms the magnetic yoke to the armature, and a winding support, which carries the excitation winding and is inserted into the yoke, in which the axially displaceable armature is guided, and an armature counter-pole arranged at the bottom of the yoke part is partially dipped into the winding carrier, and a method for producing such a solenoid.

Derartige Hubmagnete dienen zum Antrieb mechanischer Stellglieder, wobei bei der Bestromung der Erregerwicklung des Hubmagneten der Anker aus einer Anfangslage heraus gegen den Anker-Gegenpol gezogen wird und dabei die Betätigung des Stellgliedes bewirkt. Die Rückkehr..des Ankers in die Anfangslage erfolgt dabei im allgemeinen durch eine Federkraft bei Abschaltung der Erreger-Bestromung.Such solenoids are used to drive mechanical actuators, the armature being pulled out of an initial position against the armature counter-pole when the excitation winding of the solenoid is energized and thereby actuating the actuator. The return . .The armature in the initial position is generally done by a spring force when the excitation current is switched off.

Hubmagnete der eingangs erläuterten Art sind allgemein bekannt. Hierbei ist ein U-förmiges Joch vorgesehen, wobei in den Jochboden ein Pol-Kern (Anker-Gegenpol) eingenietet ist. Außer der Leitung des Magnetflusses dient der Polkern dabei zur zentrischen Aufnahme und Führung des Wicklungsträgers. In das U-förmige Joch ist dabei der Wicklungsträger eingesetzt und es ist eine Deckplatte vorgesehen, die mit einer zentrischen Bohrung versehen, über einen Kragen des Wicklungsträgers geschoben und mit den Enden der Jochseitenteile verbunden/vernietet ist. Die Ausrichtung der Deckplatte zum Joch hin erfolgt über Ausnehmungen an den Jochseitenteilen, deren Tiefe der Dicke der Deckplatte entspricht. Für eine optimale Funktion des Hubmagneten ist es dabei erforderlich, daß die Achsen des Polkernes sowie des im Wicklungsträger geführten Ankers genau fluchten.Lifting magnets of the type described in the introduction are generally known. In this case, a U-shaped yoke is provided, a pole core (armature opposite pole) being riveted into the yoke bottom. In addition to directing the magnetic flux, the pole core also serves to centrally hold and guide the winding support. The winding support is inserted into the U-shaped yoke and a cover plate is provided which is provided with a central bore, pushed over a collar of the winding support and connected / riveted to the ends of the yoke side parts. The cover plate is oriented towards the yoke via recesses on the yoke side parts, the depth of which corresponds to the thickness of the cover plate. For the solenoid to function optimally, it is necessary that the axes of the pole core and the armature guided in the winding carrier are exactly aligned.

Bei der Herstellung derartiger Hubmagnete entstehen jedoch häufig Fluchtungsfehler durch Rundlaufungenauigkeiten des Nietzapfens des Polkernes, schiefes Einnieten des Kernes, Mittenversatz der Deckplattenbohrung, sowie Fügespalte zwischen Joch und Deckplatte und zwischen Joch und Kernnietzapfen.In the manufacture of such lifting magnets, however, misalignments often occur due to inaccuracy of the rivet pin of the pole core, oblique riveting of the core, center offset of the cover plate bore, and joint gaps between the yoke and cover plate and between the yoke and the core rivet.

Außerdem tritt durch die unvermeidbaren Fügespalte eine Erhöhung des magnetischen Widerstandes des Eisenkreises auf, der eine erhöhte elektrische Erregerleistung erfordert. Weiterhin sind aufwendige Vorkehrungen erforderlich, um eine Verformung der Jochschenkel beim Nieten der Deckplatte zu vermeiden.In addition, the unavoidable joining gaps result in an increase in the magnetic resistance of the iron circuit, which requires an increased electrical excitation power. Furthermore, expensive precautions are necessary to avoid deformation of the yoke legs when riveting the cover plate.

Der Erfindung liegt nunmehr die Aufgabe zugrunde, unter Vermeidung der vorstehend erläuterten Nachteile, einen Hubmagneten zu schaffen, der aus nur wenigen Einzelheiten besteht, kostengünstiger herstellbar ist und dabei in bezug auf erzielbare Hubarbeit sowie Kennlinienverlauf weitestgehend den bekannten Bauformen und -größen entspricht.The invention is based on the object, while avoiding the disadvantages explained above, of creating a lifting magnet which consists of only a few details, can be produced more cost-effectively and largely corresponds to the known designs and sizes in terms of achievable lifting work and characteristic curve.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Joch als einstückiger Magnetrahmen ausgebildet und als Stanz-Biegeteil aus einem Blechzuschnitt geformt ist. Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Ansprüchen 2 bis 7-näher erläutert.This object is achieved in that the yoke is designed as a one-piece magnetic frame and is formed as a stamped and bent part from a sheet metal blank. Further advantageous embodiments of the invention are explained in more detail in claims 2 to 7.

.Eine weitere Aufgabe der Erfindung besteht darin, ein Verfahren anzugehen, mittels dem ein derartig gestalteter Hubmagnet kostengünstig hergestellt werden kann. Diese Aufgabe wird dadurch gelöst, daß ein Magnetrahmen verwendet wird, dessen obere Enden rechtwinklig zu den Seitenteilen (Jochschenkel) abgebogen sind und dessen Seitenteile soweit vorgebogen sind, daß der Wicklungsträger noch in den Rahmen einfügbar ist, daß der Magnetrahmen mit dem eingefügten Wicklungsträger in eine Montagevorrichtung eingesetzt wird, daß darin die Seitenteile in ihre endgültige, rechtwinklige Lage gebogen werden, wobei die freien Enden des Magnetrahmens mit hierzu vorgesehenen halbkreisförmigen Ausnehmungen den oberen Kragen des Wicklungsträgers umgreifen und dabei zur gegenseitigen Anlage gelangen, und daß die Enden des Magnetrahmens durch einen Schweißvorgang (Lichtbogen-, Laserschweißung u.ä.) miteinander verbunden werden. Weitere vorteilhafte Ausgestaltungen eines Herstellungsverfahrens sind in den Ansprüchen 9 und 10 näher erläutert.Another object of the invention is to address a method by means of which such a lifting magnet can be manufactured inexpensively. This object is achieved in that a magnetic frame is used, the upper ends of which are bent at right angles to the side parts (yoke legs) and the side parts are pre-bent to such an extent that the winding support can still be inserted into the frame such that the magnetic frame with the inserted winding support is in one Mounting device is used that the side parts are bent into their final, right-angled position the free ends of the magnetic frame with semicircular recesses provided for this purpose encompass the upper collar of the winding support and thereby come into mutual contact, and that the ends of the magnetic frame are connected to one another by a welding process (arc, laser welding, etc.). Further advantageous embodiments of a manufacturing method are explained in more detail in claims 9 and 10.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß bei der Ausbildung des "aktiven" Eisenkreises des Hubmagneten als einstückiger Magnetrahmen, die Fügespalte, die bei den bislang verwendeten, eingeniete-ten Deckplatten immer vorhanden waren, vollständig entfallen. Bei Formung des Anker-Gegenpoles als aus dem Material des Jochbodens herausgeprägten Dom bzw. Durchzug entfällt weiterhin das Einnieten des Kern-Polstückes, wobei auch hier Fügespalte- vollständig vermieden werden.The advantages achieved by the invention are, in particular, that when the "active" iron circle of the lifting magnet is designed as a one-piece magnetic frame, the joining gaps that were always present in the previously used riveted cover plates are completely eliminated. When the anchor opposite pole is shaped as a dome or passage stamped out of the material of the yoke base, the riveting of the core pole piece is also omitted, whereby joining gaps are also completely avoided here.

Dabei ist durch die einstückige Ausbildung des Magnetrahmens und des Anker-Gegenpoles stets die genau zentrische Lage des Anker-Gegenpoles gewährleistet und nicht mehr von herstellungsbedingten Mittenabweichungen des Kernansatzes bzw. Einnietgenauigkeiten abhängig. Herstellungsbedingte Fluchtungsfehler bei exzentrischer Lage des Nietansatzes des Anker-Gegenpoles, sowie bei schiefem Einnieten des Anker-Gegenpoles entfallen vollständig.The one-piece design of the magnetic frame and the armature counterpole always ensures the exact central position of the armature counterpole and is no longer dependent on the manufacturing-related center deviations of the core attachment or riveting accuracy. Manufacturing-related misalignments with the eccentric position of the rivet attachment of the armature counterpole, as well as with oblique riveting of the armature counterpole, are completely eliminated.

Der erfindungsgemäße Hubmagnet kann in seinen äußeren geometrischen Abmessungen vollständig entsprechend den bislang verwendeten Ausführungen ausgebildet sein und weist dabei die gleichen charakteristischen Betriebsdaten auf (Austauschbarkeit) - ist jedoch wesentlich kostengünstiger herstellbar. Darüber hinaus können die Betriebskenndaten wesentlich gleichmäßiger eingehalten werden, ohne daß aufwendige Montage- und Kontrollvorrichtungen verwendet werden müssen. Durch das angegebene Herstellungsverfahren wird der Fertigungsablauf auf wenige Arbeitsgänge reduziert, die darüber hinaus ohne aufwendige Montagelehren etc. durchgeführt werden können.In terms of its outer geometric dimensions, the lifting magnet according to the invention can be designed completely in accordance with the designs used to date and has the same characteristic operating data (interchangeability) - but can be produced much more cost-effectively. In addition, the operating characteristics can be maintained much more uniformly, without having to use complex assembly and control devices. The specified manufacturing process reduces the manufacturing process to just a few operations can also be carried out without complex assembly gauges etc.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.An embodiment of the invention is shown in the drawing and is explained in more detail below.

Es zeigen

  • Fig. 1 A, B die Ansichten eines Hubmagneten bekannter Bauart,
  • Fig. 2 die Ansicht des erfindungsgemäßen Hubmagneten im Halbschnitt,
  • Fig. 3 die Draufsicht auf den Magneten gemäß Fig. 2,
  • Fig. 4 die Ansicht eines Blechzuschnittes für den Magnetrahmen des Hubmagneten,
  • Fig. 5 die Ansicht des Blechzuschnittes gemäß Fig.4 im Schnitt,
  • Fig. 6 die Ansicht eines modifizierten Blechzuschnittes für den Magnetrahmen,
  • Fig. 7 die Ansicht des Blechzuschnittes gemäß Fig.6 im Schnitt,
  • Fig. 8 die Ansicht eines weiteren modifizierten Blechzuschnittes für den Magnetrahmen,
  • Fig. 9 die Ansicht des Blechzuschnittes gemäß Fig.8 im Schnitt,
  • Fig.10 die Ansicht des unteren Endes eines Magnetankers, und
  • Fig.11 die Ansicht eines Montagewerkzeuges mit eingebrachtem Hubmagneten im Teilschnitt.
Show it
  • 1A, B are views of a lifting magnet of known type,
  • 2 the view of the lifting magnet according to the invention in half section,
  • 3 shows the top view of the magnet according to FIG. 2,
  • 4 shows the view of a sheet metal blank for the magnetic frame of the lifting magnet,
  • 5 is a sectional view of the sheet metal blank according to FIG. 4,
  • 6 is a view of a modified sheet metal blank for the magnetic frame,
  • 7 is a sectional view of the sheet metal blank according to FIG. 6,
  • 8 is the view of a further modified sheet metal blank for the magnetic frame,
  • 9 is a sectional view of the sheet metal blank according to FIG. 8,
  • 10 shows the view of the lower end of a magnet armature, and
  • 11 shows the view of an assembly tool with an inserted solenoid in partial section.

In den Fig. 1 A und 1 B ist ein Hubmagnet bekannter Bauart dargestellt. Der Hubmagnet besteht im wesentlichen aus einem U-förmigen Joch 1 mit einem in den Jochboden 2 eingenieteten Polkern 3. Zur Anpassung und Ausbildung einer bestimmten Arbeits-Kennlinie ist der Polkern hier beispielsweise mit einer konischen Ausnehmung 4 versehen, in die das gleichfalls konische Ende 5 des Magnetankers 6 in Anker-Endstellung eintaucht. In das U-förmige Joch ist der mit der Erregerwicklung 7 versehene Wicklungsträger 8 eingefügt, wobei dieser an seinem unteren Ende über den Polkern 3 geschoben ist und hier zentrisch geführt und gehalten ist. Der Wicklungsträger ist dabei mit einer runden, zentrischen Durchgangsöffnung versehen, in der auch der axial verschiebbare Anker 6 angeordnet und geführt ist. Am oberen Ende des Wicklungsträgers ist ein Flansch 9 vorgesehen, der mit einem Kragen 10 versehen ist. Zur Zentrierung der Halterung in diesem Bereich und eine metallische Deckplatte 11 vorgesehen, in deren zentrische Öffnung der Kragen eintaucht. Die Deckplatte ist mit den Jochschenkeln 12 durch Nietung 13 verbunden. Die Ausrichtung der Deckplatte zum Joch hin erfolgt über Ausnehmungen im Joch, deren Tiefe der Dicke der Deckplatte entspricht. Bei Bestromung der Erregerwicklung erfolgt der magnetische Fluß über den Polkern, das Joch (Jochboden, Jochschenkel), die Deckplatte und den Anker. Durch unvermeidbare Fügespalte an den Nietstellen (Polkern, Deckplatte) treten hier oftmals erhöhte magnetische Widerstände im Flußverlauf auf.1 A and 1 B, a lifting magnet of a known type is shown. The lifting magnet essentially consists of a U-shaped yoke 1 with a pole core 3 riveted into the yoke base 2. In order to adapt and form a specific working characteristic curve, the pole core is here, for example, provided with a conical recess 4 into which the likewise conical end 5 of the magnet armature 6 is immersed in the armature end position. The winding carrier 8 provided with the excitation winding 7 is inserted into the U-shaped yoke, the latter being pushed over the pole core 3 at its lower end ben and is guided and held centrally here. The winding support is provided with a round, central through opening in which the axially displaceable armature 6 is also arranged and guided. At the upper end of the winding support, a flange 9 is provided, which is provided with a collar 10. To center the holder in this area and a metallic cover plate 11 is provided, in the central opening of which the collar is immersed. The cover plate is connected to the yoke legs 12 by riveting 13. The cover plate is oriented towards the yoke via recesses in the yoke, the depth of which corresponds to the thickness of the cover plate. When the excitation winding is energized, the magnetic flux takes place via the pole core, the yoke (yoke base, yoke leg), the cover plate and the armature. Due to unavoidable joining gaps at the rivet points (pole core, cover plate), increased magnetic resistances in the course of the flow often occur here.

In den Fig. 2 und 3 ist ein erfindungsgemäßer Hubmagnet dargestellt. Abweichend von der bislang bekannten Bauart ist hier für den magnetischen Rückschluß zum Anker nur ein Teil vorgesehen. Dieses Teil, im folgenden als Magnetrahmen 14 bezeichnet, erfüllt gleichzeitig die Funktionen von Joch 1, Deckplatte 11 und Polkern 3 der bekannten Bauart gemäß Fig.1. Zur Verdeutlichung sind die entsprechenden Bezugszeichen der Fig. 1 A, B hier eingetragen, jedoch mit einem Index versehen.2 and 3, a lifting magnet according to the invention is shown. Deviating from the previously known design, only a part is provided for the magnetic yoke to the armature. This part, hereinafter referred to as magnetic frame 14, simultaneously fulfills the functions of yoke 1, cover plate 11 and pole core 3 of the known type according to FIG. 1. For the sake of clarity, the corresponding reference numerals of FIGS. 1A, B are entered here, but are provided with an index.

Der einstückige Halterahmen 14 ist um den Wicklungsträger 8 herumgebogen, wobei der Polkern 3' am unteren Ende des Wicklungsträgers eintaucht und diesen hier zentrisch hält. Der Polkern ist dabei als aus dem Material des Halterahmens herausgeprägter, zylinderförmiger Blechdurchzug ausgebildet. Am anderen Ende des Wicklungsträgers greifen die abgewinkelten Enden 15 des Halterahmens über den Flansch 9 des Wicklungsträgers. Dabei sind die Enden mit halbkreisförmigen Ausnehmungen 16 versehen und umgreifen den Kragen 10 des Wicklungsträgers. Weiterhin sind an den Enden des Halterahmens Rasthaken 17 angeformt, die in Rastausnehmungen 18 im Flansch des Wicklungsträgers eingreifen und ein Zurückfedern des Halterahmens nach dem Biegen über den Wicklungsträger verhindern.The one-piece holding frame 14 is bent around the winding support 8, the pole core 3 'being immersed at the lower end of the winding support and holding it centrally here. The pole core is designed as a cylindrical sheet metal passage stamped out of the material of the holding frame. At the other end of the winding support, the angled ends 15 of the holding frame engage over the flange 9 of the winding support. The ends are provided with semicircular recesses 16 and encompass the collar 10 of the winding support. Furthermore, locking hooks 17 are formed on the ends of the holding frame, which in locking recesses 18 in Engage the flange of the winding carrier and prevent the holding frame from springing back after bending over the winding carrier.

Der in der Fig.2 dargestellte Polkern 3' ist als offener Durchzug in Form eines Hohlzylinders ausgebildet, in den der Anker 6 mit seinem abgesetzten konusförmigen Ende 5' eintaucht. Die Kennlinie des Magnetsystems wird dabei durch den Konuswinkel<< bestimmt. Mit dieser Polpaarung werden vorwiegend Hubkraftkennlinien mit hoher Anfangskraft erzeugt, wobei die Kennlinienform durch Veränderung des Konuswinkels d in einem weiten Bereich variiert werden kann.The pole core 3 'shown in FIG. 2 is designed as an open passage in the form of a hollow cylinder into which the armature 6 is immersed with its stepped conical end 5'. The characteristic of the magnet system is determined by the cone angle <<. With this pair of poles, primarily lifting force characteristic curves with a high initial force are generated, the characteristic curve shape being able to be varied within a wide range by changing the cone angle d.

Eine andere Ausbildung des Polkernes 3" zeigt der Blechzuschnitt gem. Fig. 6,7. Hier ist anstelle des offenen Blechdurchzuges ein runder Dom 19 mit planer, geschlossener Oberfläche 20 aus dem Material des Magnetrahmens herausgeprägt. In Zusammenwirkung mit einem Anker mit planem Polende weist ein derartiges Magnetsystem eine steigende Hubkraft-Kennlinie mit hohen Endkräften auf.Another design of the pole core 3 "is shown in the sheet metal blank according to FIG. 6.7. Here, instead of the open sheet metal passage, a round dome 19 with a flat, closed surface 20 is stamped out of the material of the magnetic frame. In cooperation with an anchor with a flat pole end, it points such a magnet system has an increasing lifting force characteristic with high final forces.

Eine weitere Ausführungsform des Polkernes 3"' zeigt der Blechzuschnitt gem. Fig. 8, 9. Hier ist vorgesehen, daß der Polkern 3"' kegelförmig gestaltet ist. Auch hierbei ist der Polkern durch einen Prägevorgang aus dem Material des Jochbodens 2' geformt. Dabei ist der kegelförmige Polkern mit einer ringförmigen Stufe 26 versehen. Die hierbei ausgebildete Fläche der Stufe dient als Anschlagfläche für die vordere Ringfläche 27 des in der Fig. 10 dargestellten Magnetankers 6', wobei bei Auflage des Ankers auf dieser Stufe der kegelförmige Polkern 3"' in die entsprechend kegelförmige Ausnehmung 28 eintaucht. Maßlich sind die Kegel von Anker und Polkern, sowie die Anordnung der Stufe so aufeinander abgestimmt, daß dabei ein geringer Luftspalt zwischen den Kegelflächen bestehen bleibt. Der unterhalb der Stufe befindliche Teil 29 des Polkern-Kegels dient zur Zentrierung des Wicklungsträgers bei dessen Einfügen in den Halterahmen und gewährleistet eine zentrische Lage des Wicklungsträgers und somit zentrischen Lauf des Ankers zum Kern.Another embodiment of the pole core 3 "'is shown in the sheet metal blank according to FIGS. 8, 9. Here it is provided that the pole core 3"' is conical. Here, too, the pole core is formed from the material of the yoke base 2 'by an embossing process. The conical pole core is provided with an annular step 26. The surface of the step formed in this way serves as a stop surface for the front annular surface 27 of the magnet armature 6 'shown in FIG. 10, the conical pole core 3 "' being immersed in the corresponding conical recess 28 when the armature is supported on this step The cone of the armature and the pole core, and the arrangement of the step, are matched to one another in such a way that a small air gap remains between the cone surfaces The part 29 of the pole core cone located below the step serves to center the winding carrier when it is inserted into the holding frame and ensures it a central position of the winding support and thus a central run of the armature to the core.

Der Magnetrahmen 14 ist aus einem Blechzuschnitt hergestellt, dessen Formgebung in den Fig.4, 5; 6,7 und 8, 9 zu erkennen ist. Vorzugsweise ist vorgesehen, den Magnetrahmen als Stanz-Biegeteil zu erstellen. Im Fertigungszustand gemäß Fig.4 bis 9 ist der Blechzuschnitt ausgestanzt und es sind die Rasthaken 17 ausgeschnitten und aus der Ebene herausgebogen. Wie in den Fig. zu erkennen, ist der Polkern 3', 3", 3"' entweder als offener, zylindrischer Blechdurchzug (Fig.4, 5), als geschlossener, zylindrischer Dom 19 (Fig.6, 7) oder als kegelförmige Prägung (Fig.8, 9) ausgebildet. In den Fig. sind weiterhin die Biegelinien 21 für das spätere Biegen und Formen des endgültigen Halterahmens strichpunktiert angedeutet. Es sind Ausnehmungen 22 vorgesehen, die so angeordnet sind, daß Greifarme (Klauen) der weiter unter näher erläuterten Montagevorrichtung in diese eingreifen können. Dabei sind diese Ausnehmungen so an den Biegekanten zwischen Jochboden und Jochschenkeln angeordnet, daß die Ausnehmungen sich nach dem Biegen des Halterahmens in den Jochschenkeln (Seitenteilen) befinden und die Greifeinrichtungen (Kiauen) direkt auf den Jochboden wirken können.The magnetic frame 14 is made from a sheet metal blank, the shape of which is shown in FIGS. 4, 5; 6,7 and 8, 9 can be seen. It is preferably provided to create the magnetic frame as a stamped and bent part. 4 to 9, the sheet metal blank is punched out and the locking hooks 17 are cut out and bent out of the plane. As can be seen in the figures, the pole core 3 ', 3 ", 3"' is either as an open, cylindrical sheet metal passage (Fig. 4, 5), as a closed, cylindrical dome 19 (Fig. 6, 7) or as a conical Embossing (Fig. 8, 9). In the figures, the bending lines 21 for the subsequent bending and shaping of the final holding frame are also indicated by dash-dotted lines. Recesses 22 are provided, which are arranged so that gripping arms (claws) of the mounting device explained in more detail below can engage in them. These recesses are so arranged on the bending edges between the yoke base and yoke legs that the recesses are located in the yoke legs (side parts) after bending the holding frame and the gripping devices (kiauen) can act directly on the yoke base.

Aufgrund der Ausbildung des erfindungsgemäßen Hubmagneten, bzw. des Magnetrahmens ist ein besonderes Montageverfahren vorgesehen, welches anhand von Fig. 11 näher erläutert wird. Es ist ein Magnetrahmen 14 vorgesehen, dessen oberen Enden 15 bereits rechtwinklig zu in bezug auf die Seitenschenkel (Jochschenkel 12) abgebogen sind, während die Seitenschenkel in bezug auf den Jochboden 2', bzw. die Achse des Magnetsystems nur soweit vorgebogen sind, daß gerade noch das Aufstecken des Wicklungsträgers 8 auf den Polkern 3', 3" bzw. 3"' möglich ist. Nach dem Einfügen des Wicklungsträgers wird der soweit vorgefertigte Hubmagnet in eine Montagevorrichtung eingesetzt, wobei sich dann der Magnetrahmen 14 in einer Matrize 23 mit der strichpunktiert angedeuteten Kontur 24 befindet. Zwei Klauen 25 greifen sodann in die Ausnehmungen 22 des Halterahmens und ziehen/ drücken ihn mit den KräftenF in die Matrize hinein. Dabei sind die Ausnehmungen in den Jochschenkeln so angeordnet, daß die Klauen direkt auf den Jochboden 2' wirken. Beim Eindrücken des Halterahmens in die Matrize werden dann die Jochschenkel nach innen geschwenkt (Pfeilrichtung a) und gelangen mit ihren abgewinkelten Enden 15 über den oberen Flansch 9 des Wicklungsträgers. Die halbkreisförmigen Ausnehmungen 16 umgreifen dabei den Kragen 10 des Wicklungsträgers und gleichzeitig gelangen die Rasthaken 17 des Halterahmens in Eingriff mit den Rastausnehmungen 18 des Wicklungsträgerflansches 9. Es wird somit ein fester Verbund zwischen Magnetrahmen und Wicklungsträger hergestellt. Anschließend wird das so fertiggestellte Magnetsystem aus dem Montagewerkzeug entfernt und der Magnetanker eingefügt.Due to the design of the lifting magnet according to the invention or the magnetic frame, a special assembly method is provided, which is explained in more detail with reference to FIG. 11. A magnetic frame 14 is provided, the upper ends 15 of which are already bent at right angles with respect to the side legs (yoke legs 12), while the side legs are only pre-bent with respect to the yoke base 2 'or the axis of the magnet system so that straight it is also possible to plug the winding carrier 8 onto the pole core 3 ', 3 "or 3"'. After the winding support has been inserted, the lifting magnet which has been prefabricated so far is inserted into an assembly device, the magnetic frame 14 then being located in a die 23 with the contour 24 indicated by dash-dotted lines. Two claws 25 then engage in the recesses 22 of the holding frame and pull / push it with the forces F into the die. The recesses in the yoke legs are arranged so that the claws act directly on the yoke base 2 '. When the holding frame is pressed into the die, the yoke legs are then pivoted inward (direction of arrow a) and their angled ends 15 pass over the upper flange 9 of the winding support. The semicircular recesses 16 encompass the collar 10 of the winding carrier and at the same time the latching hooks 17 of the holding frame come into engagement with the latching recesses 18 of the winding carrier flange 9. A firm bond is thus produced between the magnetic frame and the winding carrier. The magnet system thus completed is then removed from the assembly tool and the magnet armature inserted.

In Abwandlung des Herstellungsverfahrens kann auch vorgesehen sein, daß nach dem Biegen des Magnetrahmens in seine endgültige Form, die dann zusammenstoßenden Enden 15 miteinander verschweißt werden, um ein Auffedern des Halterahmens zu vermeiden.As a modification of the manufacturing process, it can also be provided that after the magnetic frame has been bent into its final shape, the ends 15 which then collide are welded to one another in order to prevent the holding frame from springing open.

Claims (10)

1. Hubmagnet mit einem, den magnetischen Rückschluß zum Anker bildenden, rahmenförmigen Joch, sowie einem in das Joch eingefügten, die Erregerwicklung tragenden Wicklungsträger, in dem der axial verschiebbare Anker geführt ist und wobei ein am Boden des Jochteiles angeordneter Anker-Gegenpol teilweise in den Wicklungsträger eintaucht, dadurch gekennzeichnet,
daß das Joch (1') als einstückiger Magnetrahmen (14) ausgebildet und als Stanz-Biegeteil aus einem Blechzuschnitt geformt ist.1. solenoid with a, the magnetic yoke to the armature forming, frame-shaped yoke, and an inserted in the yoke, the excitation winding carrying winding in which the axially displaceable armature is guided and wherein an armature pole arranged at the bottom of the yoke part partially in the Immersed winding carrier, characterized,
that the yoke (1 ') is designed as a one-piece magnetic frame (14) and is formed as a stamped and bent part from a sheet metal blank. 2. Hubmagnet nach Anspruch 1, dadurch gekennzeichnet, daß der Anker-Gegenpol (Polkern 3") durch einen aus dem Boden des Magnetrahmens herausgeprägten zylinderförmigen Dom (19) mit geschlossener, plan und parallel zum Boden des Magnetrahmens verlaufender oberer Fläche (20) gebildet ist, wobei nach dem Einfügen des Wicklungsträgers (8) in den Magnetrahmen (14) der Dom in den Innenraum des Wicklungsträgers eintaucht und eine Zentrierung des Wicklungsträgers über die äußeren Flächen des Domes erfolgt.2. Lifting magnet according to claim 1, characterized in that the armature counter pole (pole core 3 ") formed by a stamped out of the bottom of the magnetic frame cylindrical dome (19) with a closed, flat and parallel to the bottom of the magnetic frame extending upper surface (20) Is, after inserting the winding carrier (8) into the magnetic frame (14), the dome dips into the interior of the winding carrier and the winding carrier is centered over the outer surfaces of the dome. 3. Hubmagnet nach Anspruch 1, dadurch gekennzeichnet, daß der Anker-Gegenpol (Polkern 3') durch einen aus dem Boden des Magnetrahmens herausgeprägten, hohlzylindrischen Durchzug gebildet ist, wobei nach dem Einfügen des Wicklungsträgers (8) in den Magnetrahmen (14) der Durchzug in den Innenraum des Wicklungsträgers eintaucht und eine Zentrierung des Wicklungsträgers über die äußeren Flächen des Durchzuges erfolgt, und daß ein endseitiger, gegebenenfalls konischer Ansatz (5') des Ankers (6) beim Anzug (in der Anker-Endlage) in den hohlzylindrischen Durchzug eintaucht.3. solenoid according to claim 1, characterized in that the armature counter-pole (pole core 3 ') is formed by a stamped out of the bottom of the magnetic frame, hollow cylindrical passage, wherein after inserting the winding support (8) in the magnetic frame (14) Dive into the interior of the winding support and centering of the winding support over the outer surfaces of the passage, and that an end, possibly conical approach (5 ') of the armature (6) when tightening (in the armature end position) in the hollow cylindrical passage immersed. 4. Hubmagnet nach Anspruch 1, dadurch gekennzeichnet, daß der Anker-Gegenpol (Polkern 3'") durch eine kegelförmige Ausprägung im Bodenteil (2') des Magnetrahmens (14) gebildet ist.4. Lifting magnet according to claim 1, characterized in that the armature counter pole (pole core 3 '") is formed by a conical shape in the bottom part (2') of the magnetic frame (14). 5. Hubmagnet nach Anspruch 4, dadurch gekennzeichnet, daß die kegelförmige Ausprägung mit einer ringförmigen Stufe (26) versehen ist,
daß nach dem Einfügen des Wicklungsträgers (8) in den Magnetrahmen (14) die Ausprägung in den Wicklungsträger eintaucht und eine Zentrierung des Wicklungsträgers über den unteren Teil (29) des Kegelstumpfes erfolgt.5. solenoid according to claim 4, characterized in that the conical shape is provided with an annular step (26),
that after inserting the winding carrier (8) into the magnetic frame (14), the shape is immersed in the winding carrier and the winding carrier is centered over the lower part (29) of the truncated cone. 6. Hubmagnet nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der Anker (6') mit einer dem Polkern (3"') entsprechenden kegelförmigen Ausnehmung (28) versehen ist, wobei bei Anzug des Ankers der kegelförmige Polkern in die Ausnehmung eintaucht, und daß in der Anker-Endlage (Anzugsstellung) eine vordere Ringfläche (27) des Ankers auf der Stufe (26) des Pol- kernes zur Auflage gelangt.6. Lifting magnet according to claim 4 or 5, characterized in that the armature (6 ') is provided with a conical recess (28) corresponding to the pole core (3 "'), the conical pole core being immersed in the recess when the armature is tightened, and in that the armature end position (starting position) comprises a front annular surface (27) of the anchor on the step (26) of the pole - enters the core to the support. 7. Hubmagnet nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß an den oberen Enden (15) des Halterahmens (14), an deren nach innen weisenden Flächen Haltenasen (17) ausgebildet sind, die nach dem Zusammenbiegen der Seitenteile des Halterahmens über den zuvor eingefügten Wicklungsträger (8) in an dessen oberem Flansch (9) eingeformte Ausnehmungen (18) eingreifen.7. Lifting magnet according to one of the preceding claims, characterized in that at the upper ends (15) of the holding frame (14), on the inwardly facing surfaces of which retaining lugs (17) are formed, which after bending the side parts of the holding frame over the previously inserted winding carrier (8) engage in recesses (18) formed in its upper flange (9). 8. Verfahren zur Herstellung eines Hubmagneten nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß ein Magnetrahmen (14) verwendet wird, dessen obere Enden (15) rechtwinklig zu den Seitenteilen (Jochschenkel 12) abgebogen sind und dessen Seitenteile soweit vorgebogen sind, daß der Wicklungsträger (8) noch in den Rahmen einfügbar ist, daß der Halterahmen mit dem eingefügten Wicklungsträger in eine Montagevorrichtung eingesetzt wird, daß darin die Seitenteile in ihre endgültige, rechtwinkelige Lage gebogen werden, wobei die freien Enden (15) des Magnetrahmens (14) mit hierzu vorgesehenen halbkreisförmigen Ausnehmungen (16) den oberen Kragen (10) des Wicklungsträgers (8) umgreifen und dabei zur gegenseitigen Anlage gelangen, und daß die Enden (15) des Magnetrahmens durch einen Schweißvorgang (Lichtbogen-, Laserschweißung o.ä.) miteinander verbunden werden. 8. A method for producing a lifting magnet according to one of claims 1-6, characterized in that that a magnetic frame (14) is used, the upper ends (15) of which are bent at right angles to the side parts (yoke legs 12) and the side parts are bent so far that the winding support (8) can still be inserted into the frame, that the holding frame with the inserted winding carrier is inserted into an assembly device, that the side parts are bent into their final, right-angled position, the free ends (15) of the magnetic frame (14) with semicircular recesses (16) provided for this purpose engaging around the upper collar (10) of the winding support (8) and thereby for mutual contact arrive, and that the ends (15) of the magnetic frame are connected to one another by a welding process (arc welding, laser welding or the like). 9. Verfahren zur Herstellung eines Hubmagneten nach Anspruch 7, dadurch gekennzeichnet, daß ein Magnetrahmen (14) verwendet wird, dessen obere Enden (15) rechtwinklig zu den"Seitenteilen (Jochschenkel 12) abgebogen sind und dessen Seitenteile soweit vorgebogen sind, daß der Wicklungsträger (8) noch in den Rahmen einfügbar ist, daß der Magnetrahmen mit dem eingefügten Wicklungsträger in eine Montagevorrichtung eingesetzt wird, und daß darin die Seitenteile in ihre endgültige, rechtwinklige Lage gebogen werden, wobei die freien Enden (15) des Magnetrahmens (14) mit hierzu vorgesehenen halbkreisförmigen Ausnehmungen (16) den oberen Kragen (10) des Wicklungsträgers (8) umgreifen und an der Innenseite des Halterahmens angeformte Rasthaken (17) in entsprechende, im Flansch (9) des Wicklungsträgers (8) vorgesehene Ausnehmungen (18) einrasten. 9. A method for producing a lifting magnet according to claim 7, characterized in that that a magnetic frame (14) is used, the upper ends (15) of which are bent at right angles to the " side parts (yoke legs 12) and the side parts are bent so far that the winding support (8) can still be inserted into the frame, that the magnetic frame with the inserted winding carrier is inserted into a mounting device, and that the side parts are bent into their final, right-angled position therein, the free ends (15) of the magnetic frame (14) with semicircular recesses (16) provided for this purpose the upper collar (10) of the winding support (8) and snap-in hooks (17) formed on the inside of the holding frame into corresponding recesses (18) provided in the flange (9) of the winding support (8). 10. Verfahren zur Herstellung eines Hubmagneten nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß der Halterahmen (14) in seinem unteren Bereich mit Ausnehmungen (22) in den Seitenteilen versehen ist, und daß beim Montagevorgang Klauen (25) des Montagewerkzeuges in diese Ausnehmungen eingreifen und den Halterahmen in eine entsprechend der endgültigen Form des Halterahmens ausgebildete Matrize (23) ziehen, wobei der Halterahmen seine Restabwinkelung erfährt. 10. A method for producing a lifting magnet according to claim 8 or 9, characterized in that that the holding frame (14) is provided in its lower region with recesses (22) in the side parts, and that claws (25) of the assembly tool engage in these recesses during the assembly process and pull the holding frame into a die (23) designed in accordance with the final shape of the holding frame, the holding frame undergoing its remaining bending.
EP85115476A 1984-12-17 1985-12-05 Lifting magnet Expired EP0185262B1 (en)

Priority Applications (1)

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AT85115476T ATE44188T1 (en) 1984-12-17 1985-12-05 LIFTING MAGNET.

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DE3445917 1984-12-17
DE19843445917 DE3445917A1 (en) 1984-12-17 1984-12-17 LIFT MAGNET

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EP0185262A1 true EP0185262A1 (en) 1986-06-25
EP0185262B1 EP0185262B1 (en) 1989-06-21

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DE3047712A1 (en) * 1980-12-18 1982-07-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart DC solenoid with armature guided along non-magnetic pin - has stroke limiting stop with compression spring between armature and pole piece
US4419642A (en) * 1982-01-28 1983-12-06 Deere & Company Solenoid with saturable element
US4438418A (en) * 1982-07-19 1984-03-20 Mac Valves, Inc. Low-wattage solenoid

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664087A1 (en) * 1990-05-17 1992-01-03 Stiatti Vittorio Electromagnet for electromagnetic valves
GR910100210A (en) * 1990-05-17 1992-07-30 Vittorio Stiatti Electric magnet for electromagnetic valves
WO2000070628A1 (en) * 1999-05-14 2000-11-23 Continental Teves Ag & Co. Ohg Electromagnet
EP1722380A3 (en) * 2005-05-11 2009-03-18 Elbi International SPA Direct current electric actuator, for domestic appliances in particular
WO2008080860A1 (en) * 2007-01-05 2008-07-10 Robert Bosch Gmbh Magnet coil and method for its production

Also Published As

Publication number Publication date
DE3445917A1 (en) 1986-06-19
JPS61228603A (en) 1986-10-11
EP0185262B1 (en) 1989-06-21
JPH0528886B2 (en) 1993-04-27
ATE44188T1 (en) 1989-07-15
DE3571170D1 (en) 1989-07-27

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