EP0552416A1 - Direct current electromagnetic actuator - Google Patents

Direct current electromagnetic actuator Download PDF

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Publication number
EP0552416A1
EP0552416A1 EP92117176A EP92117176A EP0552416A1 EP 0552416 A1 EP0552416 A1 EP 0552416A1 EP 92117176 A EP92117176 A EP 92117176A EP 92117176 A EP92117176 A EP 92117176A EP 0552416 A1 EP0552416 A1 EP 0552416A1
Authority
EP
European Patent Office
Prior art keywords
tube
lifting magnet
magnet according
armature
soft
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.)
Withdrawn
Application number
EP92117176A
Other languages
German (de)
French (fr)
Inventor
Heinz Freitag
Helmut Richl
Wolfgang Ketterer
Wolfgang Knöbel
Alfred Geyer
Hans-Peter Oesterle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Binder Magnete GmbH
Original Assignee
Binder Magnete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Binder Magnete GmbH filed Critical Binder Magnete GmbH
Publication of EP0552416A1 publication Critical patent/EP0552416A1/en
Withdrawn legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16Rectilinearly-movable armatures
    • H01F7/1607Armatures entering the winding
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081Magnetic constructions
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081Magnetic constructions
    • H01F2007/085Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

Definitions

  • the invention relates to a DC solenoid according to the preamble of claim 1.
  • the soft magnetic housing that guides the magnetic flux and encloses the excitation coil is machined from pipe material. This production is complex. Furthermore, in the manufacture of the tube guiding the armature for producing the non-magnetizable separating joint which effects the armature stroke, the tube is arranged accordingly and the separating joint is poured out with the non-magnetizable material. Post-processing of the parting line is necessary. Both the pouring of the parting line and the post-processing represent a significant cost factor in the manufacture of the lifting magnet. Since lifting magnets of this type are required as actuating magnets in increasing numbers in the course of increasing automation, the market demands a high level of economy of these lifting magnets.
  • the invention is therefore based on the object of providing a lifting magnet which can be produced particularly cost-effectively.
  • the housing enclosing the excitation coil and guiding the magnetic flux is made of sheet metal.
  • a sheet metal part is punched out of this sheet and rolled into a tube.
  • flaps are provided which engage behind one another and hold the tubular rolled sheet metal part together in a form-fitting manner on the longitudinal butt joint.
  • a ring made of a non-magnetizable metal is used, which is plugged together axially with the tube in the region of the separation joint.
  • the ring already holds the two tube parts or the tube and a pole core that extends this tube in the predetermined position and it is not necessary to pour out the joint.
  • the ring is preferably soldered to connect the ring to the tube or the pole core on both sides. It is useful for this purpose at the connection points of the ring a solder paste is applied to the tube or pole core so that the connection can be made by heating. Since the ring is dimensionally stable, it is not necessary to rework the pipe in the area of the parting line.
  • the lifting magnet is preferably designed to be pressure-tight so that it can be used in hydraulics, e.g. can be used to actuate hydraulic slides.
  • the actuation system is sealed pressure-tight with the tube carrying the anchor.
  • the excitation system consisting of the excitation coil and the housing, is pushed onto the actuation system and screwed to it using a union nut. This enables the excitation system, e.g. to be removed and replaced in the event of a defect, even if the interior of the actuation system is under hydraulic pressure.
  • the DC solenoid serves as a pressure-tight actuating magnet for actuating a hydraulic slide.
  • the solenoid consists of an actuation system and a this superimposed excitation system.
  • the actuation system shown separately in FIG. 2 has a soft magnetic pole core 10, to which a soft magnetic tube 12 is axially connected.
  • a soft magnetic armature 14 is guided axially displaceably in the tube 12.
  • the pole core 10 and the tube 12 are axially separated from one another by a non-magnetizable separating joint, which is arranged in the region of the stroke of the end edge of the armature 14 and determines the magnetic force-stroke characteristic of the stroke magnet.
  • the parting line is formed by a ring 16 made of a non-magnetizable metal.
  • the ring 16 is placed on the one hand on an axially projecting collar 18 of the pole core 10 and on the other hand on a corresponding axially projecting collar of the tube 12.
  • a solder paste is applied to the contact surfaces and the pole core 10, ring 16 and tube 12 are soldered to one another by heating.
  • the pole core 10 has an external thread 20 on an extension opposite the tube 12, with which it can be screwed into the hydraulic slide or the other hydraulic system.
  • An actuating pin 22 is guided coaxially through the pole core 10 and axially displaceable therein.
  • the actuating pin 22 serves to actuate the hydraulic slide with its end led out of the pole core 10.
  • the armature 14 engages at the opposite end 24 of the actuating pin 22, which protrudes into the interior of the tube 12. This end 24 of the actuating pin 22 is deformed to expand its outer diameter, so that the actuating pin 22 is held captively in the pole core 10.
  • the actuating pin 22 has a polygonal cross-sectional profile, e.g. a hexagon profile, so that the hydraulic oil of the hydraulic system can pass between the outer circumference of the polygonal actuating pin 22 and the inner circumference of the round guide bore of the pole core 10 in the interior 26 of the tube 12.
  • the tube 12 is closed by a stop part 28 which determines the stroke end position of the armature 14.
  • An O-ring 30 inserted between the stop part 28 and the tube 12 serves for pressure-tight sealing.
  • a snap ring 32 inserted into the pipe 12 behind the stop part 28 holds the stop part 28 against the hydraulic pressure in the pipe 12.
  • the stop part 28 has an axial bore in which a bolt 34 is axially displaceable.
  • the bolt 34 carries an O-ring 78 which bears against the inner wall of the bore of the stop part 28 and seals the interior 26.
  • An inwardly drawn shoulder of the bore of the stop member 28 holds the bolt 34 against the hydraulic pressure in the interior 26.
  • the bolt 34 serves as a manual override, e.g. in the event of a power failure, for which purpose the bolt 34 is used using a suitable tool, e.g. a screwdriver is pressed inward and thereby moves the armature 14.
  • the armature 14 has on its outer circumference longitudinal grooves 36 or longitudinal bores, via which hydraulic fluid pressure compensation can take place during the lifting movement of the armature 14.
  • a non-magnetizable disk 76 is inserted into the end face of the pole core 10 facing the armature 14 in order to facilitate the separation of the pole core 10 and armature 14 during its lifting movement.
  • the excitation system has an excitation coil 38 which is wound on a coil support 40.
  • the excitation coil 38 is cast with a plastic sheathing 42, on which a plug base 44 is integrally formed.
  • contact pins are cast as a phase connection 46 and as a ground connection 48 for the excitation coil 38.
  • the excitation coil 38 with the plastic sheathing 42 is inserted coaxially into a tubular housing 50.
  • the housing 50 is punched out of a soft magnetic sheet as a sheet metal part and rolled into a tube.
  • flaps 52 which are complementary to one another are formed when punching out and engage behind one another when the edges are joined, as can be seen in FIG. 3.
  • the interlocking tabs 52 hold the rolled housing 50 together in a form-fitting manner at the longitudinal joint.
  • An axial recess 54 in the housing 50 receives the plug base 44, which projects radially outward from the plastic casing 42.
  • the housing 50 is closed at its two axial ends by soft magnetic disks 56 and 58.
  • the disks 56 and 58 are preferably also punched out of a soft magnetic sheet. So that the two disks 56 and 58 have a sufficient cross-section for guiding the magnetic flux, the disks 56 and 58 can preferably also be constructed as a package from several punched individual disks.
  • the disks 56 and 58 are pressed into the housing 50 and axially secured by deformations 60 of the inner wall of the housing 50.
  • the excitation coil 38 are elastic Sealing washers 62 are used, which prevent the penetration of moisture into the interior of the coil 40 and enable axial length compensation.
  • the excitation system consisting of the excitation coil 38 and the housing 50 is pushed axially onto the actuation system and axially secured by a plastic union nut 64 which engages over the rear end of the tube 12, is screwed onto an external thread 66 of the stop part 28 and is attached to the disks 58 of the housing 50 supports.
  • the actuating system is first screwed into the hydraulic slide by means of the external thread 20, for which purpose key surfaces 68 of the pole core 10 are used.
  • the excitation system is then pushed axially onto the actuation system, a positioning lug 70 of the excitation system fixing its position on the hydraulic slide.
  • the union nut 64 is screwed on, which presses the excitation system forward and with the washers 56 to bear against the hydraulic slide.
  • a tab 72 of the ground connection 48 caulked with the disks 56 establishes the ground connection between the hydraulic slide and the excitation system.
  • a socket not shown, is plugged onto the plug base 44 and its contact pins 46, 48 and secured by a screw which is screwed into a threaded insert 74 of the plug base 44.
  • the lifting magnet is simple and inexpensive to manufacture.
  • the housing of the excitation system consists essentially of stamped and bent parts, namely the housing 50 and the disks 56, 58.
  • the actuation system can be produced fully automatically by plugging together the pole core 10, ring 16 and tube 12 and preferably soldering them with solder paste without that subsequent processing is necessary.
  • the tube 12 and the armature 14 are made from drawn rods of a soft magnetic material.
  • the lifting magnet allows easy assembly.
  • the excitation system can also be replaced when the actuation system is pressurized.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)

Abstract

A DC lifting magnet has a soft-magnetic armature (14), a soft-magnetic tube (12) which guides the armature (14), a separating joint (16) consisting of non-magnetic material on the tube (12), an excitation coil (38), a soft-magnetic housing (50) which encloses the excitation coil (38), and an operating pin (22) which can be displaced by means of the armature (14). For cost-effective production, the housing (50) is a stamped and rolled sheet-metal part which is held together in a positively-locking manner at its longitudinal butt joint by means of flaps (52) which engage behind one another. <IMAGE>

Description

Die Erfindung betrifft einen Gleichstrom-Hubmagneten gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a DC solenoid according to the preamble of claim 1.

Bei Gleichstrom-Hubmagneten dieser Gattung wird das den Magnetfluß führende, die Erregerspule umschließende weichmagnetische Gehäuse in spanabhebender Bearbeitung aus Rohrmaterial hergestellt. Diese Herstellung ist aufwendig. Weiter wird bei der Herstellung des den Anker führenden Rohres zur Erzeugung der den Ankerhub bewirkenden nichtmagnetisierbaren Trennfuge das Rohr entsprechend angeordnet und die Trennfuge mit dem nichtmagnetisierbaren Material ausgegossen. Eine Nachbearbeitung der Trennfuge ist notwendig. Sowohl das Ausgießen der Trennfuge als auch die Nachbearbeitung stellen einen wesentlichen Kostenfaktor bei der Herstellung des Hubmagneten dar. Da Hubmagnete dieser Gattung im Zuge der zunehmenden Automatisierung in wachsenden Stückzahlen als Betätigungsmagnete benötigt werden, wird vom Markt eine hohe Wirschaftlichkeit dieser Hubmagnete gefordert.In DC solenoids of this type, the soft magnetic housing that guides the magnetic flux and encloses the excitation coil is machined from pipe material. This production is complex. Furthermore, in the manufacture of the tube guiding the armature for producing the non-magnetizable separating joint which effects the armature stroke, the tube is arranged accordingly and the separating joint is poured out with the non-magnetizable material. Post-processing of the parting line is necessary. Both the pouring of the parting line and the post-processing represent a significant cost factor in the manufacture of the lifting magnet. Since lifting magnets of this type are required as actuating magnets in increasing numbers in the course of increasing automation, the market demands a high level of economy of these lifting magnets.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Hubmagneten zur Verfügung zu stellen, der besonders kostengünstig herstellbar ist.The invention is therefore based on the object of providing a lifting magnet which can be produced particularly cost-effectively.

Diese Aufgabe wird erfindungsgemäß gelöst durch einen Gleichstrom-Hubmagneten mit den Merkmalen der Ansprüche 1 bzw. 2.This object is achieved according to the invention by a DC solenoid with the features of claims 1 and 2, respectively.

Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.

Bei dem erfindungsgemäßen Gleichstrom-Hubmagneten wird das die Erregerspule umschließende, den Magnetfluß führende Gehäuse aus Blech hergestellt. Hierzu wird aus diesem Blech ein Blechteil gestanzt und rohrförmig gerollt. An den die Längsstoßfuge bildenden Kanten des Blechteils sind dabei Lappen vorgesehen, die sich gegenseitig hintergreifen und das rohrförmig gerollte Blechteil an der Längsstoßfuge formschlüssig zusammenhalten. Die Herstellung des Gehäuses durch Stanzen und Rollen ermöglicht eine kostengünstige Produktion in großen Stückzahlen. Insbesondere entfällt eine aufwendige spanabhebende Bearbeitung.In the case of the DC solenoid according to the invention, the housing enclosing the excitation coil and guiding the magnetic flux is made of sheet metal. For this purpose, a sheet metal part is punched out of this sheet and rolled into a tube. On the edges of the sheet metal part forming the longitudinal butt joint, flaps are provided which engage behind one another and hold the tubular rolled sheet metal part together in a form-fitting manner on the longitudinal butt joint. The manufacture of the housing by punching and rolling enables inexpensive production in large quantities. In particular, there is no need for complex machining.

Um die nichtmagnetisierbare Trennfuge des den Anker führenden Rohres zu bilden, wird ein Ring aus einem nicht magnetisierbaren Metall verwendet, der in dem Bereich der Trennfuge axial mit dem Rohr zusammengesteckt wird. Der Ring hält dadurch bereits die beiden Rohrteile bzw. das Rohr und einen dieses Rohr verlängernden Polkern in der vorgegebenen Position und ein Ausgießen der Trennfuge ist nicht erforderlich. Zur beiderseitigen Verbindung des Ringes mit dem Rohr bzw. dem Polkern wird der Ring vorzugsweise verlötet. Zweckmäßigerweise wird hierzu an den Verbindungsstellen des Ringes mit dem Rohr bzw. Polkern eine Lötpaste aufgetragen, so daß die Verbindung durch Erhitzen hergestellt werden kann. Da der Ring formstabil ist, ist eine Nachbearbeitung des Rohres im Bereich der Trennfuge nicht notwendig.In order to form the non-magnetizable separation joint of the tube guiding the anchor, a ring made of a non-magnetizable metal is used, which is plugged together axially with the tube in the region of the separation joint. As a result, the ring already holds the two tube parts or the tube and a pole core that extends this tube in the predetermined position and it is not necessary to pour out the joint. The ring is preferably soldered to connect the ring to the tube or the pole core on both sides. It is useful for this purpose at the connection points of the ring a solder paste is applied to the tube or pole core so that the connection can be made by heating. Since the ring is dimensionally stable, it is not necessary to rework the pipe in the area of the parting line.

Der Hubmagnet wird vorzugsweise druckdicht ausgeführt, so daß er in der Hydraulik, z.B. zur Betätigung von Hydraulik-Schiebern eingesetzt werden kann. Hierzu wird das Betätigungssystem mit dem den Anker führenden Rohr druckfest abgedichtet. Das Erregersystem, bestehend aus der Erregerspule und dem Gehäuse, wird auf das Betätigungssystem aufgeschoben und mit diesem mittels einer Überwurfmutter verschraubt. Dadurch ist es möglich, das Erregersystem, z.B. im Falle eines Defektes abzuziehen und auszuwechseln, auch wenn der Innenraum des Betätigungssystems unter dem Hydraulikdruck steht.The lifting magnet is preferably designed to be pressure-tight so that it can be used in hydraulics, e.g. can be used to actuate hydraulic slides. For this purpose, the actuation system is sealed pressure-tight with the tube carrying the anchor. The excitation system, consisting of the excitation coil and the housing, is pushed onto the actuation system and screwed to it using a union nut. This enables the excitation system, e.g. to be removed and replaced in the event of a defect, even if the interior of the actuation system is under hydraulic pressure.

Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen

Figur 1 -
einen axialen Halbschnitt des Hubmagneten,
Figur 2 -
einen entsprechenden axialen Halbschnitt des Betätigungssystems des Hubmagneten und
Figur 3 -
eine Seitenansicht des Gehäuses des Hubmagneten.
The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing. Show it
Figure 1 -
an axial half section of the solenoid,
Figure 2 -
a corresponding axial half section of the actuating system of the solenoid and
Figure 3 -
a side view of the housing of the solenoid.

Der Gleichstrom-Hubmagnet dient als druckdichter Betätigungsmagnet zur Betätigung eines Hydraulik-Schiebers. Der Hubmagnet besteht aus einem Betätigungssystem und einem auf dieses aufgesetzten Erregersystem.The DC solenoid serves as a pressure-tight actuating magnet for actuating a hydraulic slide. The solenoid consists of an actuation system and a this superimposed excitation system.

Das in Figur 2 gesondert dargestellte Betätigungssystem weist einen weichmagnetischen Polkern 10 auf, an welchen sich axial ein weichmagnetisches Rohr 12 anschließt. In dem Rohr 12 ist axial verschiebbar ein weichmagnetischer Anker 14 geführt. Der Polkern 10 und das Rohr 12 sind durch eine nichtmagnetisierbare Trennfuge axial voneinander getrennt, die im Bereich des Hubweges der Stirnkante des Ankers 14 angeordnet ist und die Magnetkraft-Hub-Kennlinie des Hubmagneten bestimmt.The actuation system shown separately in FIG. 2 has a soft magnetic pole core 10, to which a soft magnetic tube 12 is axially connected. A soft magnetic armature 14 is guided axially displaceably in the tube 12. The pole core 10 and the tube 12 are axially separated from one another by a non-magnetizable separating joint, which is arranged in the region of the stroke of the end edge of the armature 14 and determines the magnetic force-stroke characteristic of the stroke magnet.

Die Trennfuge wird durch einen Ring 16 aus einem nichtmagnetisierbaren Metall gebildet. Der Ring 16 wird einerseits auf einen axial vorspringenden Kragen 18 des Polkerns 10 und andererseits auf einen entsprechenden axial vorspringenden Kragen des Rohres 12 aufgesteckt. Zur Verbindung des Ringes 16 mit dem Polkern 10 und dem Rohr 12 wird an den Kontaktflächen eine Lötpaste aufgetragen und Polkern 10, Ring 16 und Rohr 12 werden durch Erhitzen miteinander verlötet.The parting line is formed by a ring 16 made of a non-magnetizable metal. The ring 16 is placed on the one hand on an axially projecting collar 18 of the pole core 10 and on the other hand on a corresponding axially projecting collar of the tube 12. To connect the ring 16 to the pole core 10 and the tube 12, a solder paste is applied to the contact surfaces and the pole core 10, ring 16 and tube 12 are soldered to one another by heating.

Der Polkern 10 weist an einem dem Rohr 12 entgegengesetzten Ansatz ein Außengewinde 20 auf, mit welchem er in den Hydraulik-Schieber oder das sonstige hydraulische System eingeschraubt werden kann. Ein Betätigungsstift 22 ist koaxial durch den Polkern 10 geführt und in diesem axial verschiebbar. Der Betätigungsstift 22 dient zur Betätigung des Hydraulik-Schiebers mit seinem aus dem Polkern 10 herausgeführten Ende. An dem entgegengesetzten, in den Innenraum des Rohres 12 hineinragenden Ende 24 des Betätigungsstiftes 22 greift der Anker 14 an. Dieses Ende 24 des Betätigungsstiftes 22 ist zur Erweiterung seines Außendurchmessers verformt, so daß der Betätigungsstift 22 unverlierbar in dem Polkern 10 gehalten ist.The pole core 10 has an external thread 20 on an extension opposite the tube 12, with which it can be screwed into the hydraulic slide or the other hydraulic system. An actuating pin 22 is guided coaxially through the pole core 10 and axially displaceable therein. The actuating pin 22 serves to actuate the hydraulic slide with its end led out of the pole core 10. The armature 14 engages at the opposite end 24 of the actuating pin 22, which protrudes into the interior of the tube 12. This end 24 of the actuating pin 22 is deformed to expand its outer diameter, so that the actuating pin 22 is held captively in the pole core 10.

Der Betätigungsstift 22 weist ein mehrkantiges Querschnittsprofil, z.B. ein Sechskant-Profil, auf, so daß das Hydraulik-Öl des Hydrauliksystems zwischen dem Außenumfang des mehrkantigen Betätigungsstiftes 22 und dem Innenumfang der runden Führungsbohrung des Polkerns 10 in den Innenraum 26 des Rohres 12 hindurchtreten kann.The actuating pin 22 has a polygonal cross-sectional profile, e.g. a hexagon profile, so that the hydraulic oil of the hydraulic system can pass between the outer circumference of the polygonal actuating pin 22 and the inner circumference of the round guide bore of the pole core 10 in the interior 26 of the tube 12.

An dem dem Polkern 10 entgegengesetzten Ende ist das Rohr 12 durch ein Anschlagteil 28 verschlossen, welches die Hubendlage des Ankers 14 bestimmt. Ein zwischen das Anschlagteil 28 und das Rohr 12 eingesetzter O-Ring 30 dient zur druckfesten Abdichtung. Ein hinter dem Anschlagteil 28 in das Rohr 12 eingesetzter Sprengring 32 hält das Anschlagteil 28 gegen den Hydraulikdruck in dem Rohr 12.At the end opposite the pole core 10, the tube 12 is closed by a stop part 28 which determines the stroke end position of the armature 14. An O-ring 30 inserted between the stop part 28 and the tube 12 serves for pressure-tight sealing. A snap ring 32 inserted into the pipe 12 behind the stop part 28 holds the stop part 28 against the hydraulic pressure in the pipe 12.

Das Anschlagteil 28 weist eine axiale Bohrung auf, in welcher ein Bolzen 34 axial verschiebbar sitzt. Der Bolzen 34 trägt einen O-Ring 78, der an der Innenwandung der Bohrung des Anschlagteils 28 anliegt und den Innenraum 26 abdichtet. Eine nach innen gezogene Schulter der Bohrung des Anschlagteils 28 hält den Bolzen 34 gegen den Hydraulikdruck im Innenraum 26. Der Bolzen 34 dient als Handnotbetätigung, z.B. bei Stromausfall, wozu der Bolzen 34 mittels eines geeigneten Werkzeuges, z.B. eines Schraubendrehers nach innen gedrückt wird und dabei den Anker 14 verschiebt.The stop part 28 has an axial bore in which a bolt 34 is axially displaceable. The bolt 34 carries an O-ring 78 which bears against the inner wall of the bore of the stop part 28 and seals the interior 26. An inwardly drawn shoulder of the bore of the stop member 28 holds the bolt 34 against the hydraulic pressure in the interior 26. The bolt 34 serves as a manual override, e.g. in the event of a power failure, for which purpose the bolt 34 is used using a suitable tool, e.g. a screwdriver is pressed inward and thereby moves the armature 14.

Der Anker 14 weist an seinem Außenumfang Längsnuten 36 oder Längsbohrungen auf, über welche ein Hydraulikfluid-Druckausgleich bei der Hubbewegung des Ankers 14 erfolgen kann. Eine nichtmagnetisierbare Scheibe 76 ist in die dem Anker 14 zugewandte Stirnfläche des Polkerns 10 eingesetzt, um die Trennung von Polkern 10 und Anker 14 bei dessen Hubbewegung zu erleichtern.The armature 14 has on its outer circumference longitudinal grooves 36 or longitudinal bores, via which hydraulic fluid pressure compensation can take place during the lifting movement of the armature 14. A non-magnetizable disk 76 is inserted into the end face of the pole core 10 facing the armature 14 in order to facilitate the separation of the pole core 10 and armature 14 during its lifting movement.

Das Erregersystem weist eine Erregerspule 38 auf, die auf einen Spulenträger 40 gewickelt ist. Die Erregerspule 38 ist mit einer Kunststoff-Ummantelung 42 umgossen, an welcher einstückig ein Steckersockel 44 angeformt ist. In die Kunststoff-Ummantelung 42 und den Steckersockel 44 sind Kontaktstifte als Phasenanschluß 46 und als Masseanschluß 48 für die Erregerspule 38 eingegossen.The excitation system has an excitation coil 38 which is wound on a coil support 40. The excitation coil 38 is cast with a plastic sheathing 42, on which a plug base 44 is integrally formed. In the plastic sheathing 42 and the connector base 44, contact pins are cast as a phase connection 46 and as a ground connection 48 for the excitation coil 38.

Die Erregerspule 38 mit der Kunststoff-Ummantelung 42 ist koaxial in ein rohrförmiges Gehäuse 50 eingesetzt. Wie Figur 3 zeigt, ist das Gehäuse 50 als Blechteil aus einem weichmagnetischen Blech ausgestanzt und rohrförmig gerollt. An den beiden Kanten des Blechteils, die beim Rollen als Längsstoßfuge aneinander anliegen, sind beim Ausstanzen zueinander komplementäre Lappen 52 ausgeformt, die sich beim Zusammenfügen der Kanten gegenseitig hintergreifen, wie dies in Figur 3 zu sehen ist. Die ineinandergreifenden Lappen 52 halten das gerollte Gehäuse 50 an der Längsstoßfuge formschlüssig zusammen. Eine axiale Aussparung 54 des Gehäuses 50 nimmt den radial von der Kunststoff-Ummantelung 42 nach außen ragenden Steckersockel 44 auf.The excitation coil 38 with the plastic sheathing 42 is inserted coaxially into a tubular housing 50. As FIG. 3 shows, the housing 50 is punched out of a soft magnetic sheet as a sheet metal part and rolled into a tube. On the two edges of the sheet metal part, which abut against one another during rolling as a longitudinal butt joint, flaps 52 which are complementary to one another are formed when punching out and engage behind one another when the edges are joined, as can be seen in FIG. 3. The interlocking tabs 52 hold the rolled housing 50 together in a form-fitting manner at the longitudinal joint. An axial recess 54 in the housing 50 receives the plug base 44, which projects radially outward from the plastic casing 42.

Das Gehäuse 50 ist an seinen beiden axialen Enden durch weichmagnetische Scheiben 56 und 58 verschlossen. Die Scheiben 56 und 58 sind vorzugsweise ebenfalls aus einem weichmagnetischen Blech ausgestanzt. Damit die beiden Scheiben 56 und 58 einen ausreichenden Querschnitt zur Führung des Magnetflusses haben, können die Scheiben 56 und 58 vorzugsweise auch als Paket aus mehreren gestanzten Einzelscheiben aufgebaut sein. Die Scheiben 56 und 58 sind in das Gehäuse 50 eingepreßt und durch Verformungen 60 der Innenwandung des Gehäuses 50 axial gesichert. Zwischen die Scheiben 56 bzw. 58 und den Spulenträger 40, der Erregerspule 38 sind elastische Dichtungsscheiben 62 eingesetzt, die das Eindringen von Feuchtigkeit in das Innere der Spule 40 verhindern und einen axialen Längenausgleich ermöglichen.The housing 50 is closed at its two axial ends by soft magnetic disks 56 and 58. The disks 56 and 58 are preferably also punched out of a soft magnetic sheet. So that the two disks 56 and 58 have a sufficient cross-section for guiding the magnetic flux, the disks 56 and 58 can preferably also be constructed as a package from several punched individual disks. The disks 56 and 58 are pressed into the housing 50 and axially secured by deformations 60 of the inner wall of the housing 50. Between the disks 56 and 58 and the coil carrier 40, the excitation coil 38 are elastic Sealing washers 62 are used, which prevent the penetration of moisture into the interior of the coil 40 and enable axial length compensation.

Das aus der Erregerspule 38 und dem Gehäuse 50 bestehende Erregersystem wird axial auf das Betätigungssystem geschoben und axial durch eine Überwurfmutter 64 aus Kunststoff gesichert, die das hintere Ende des Rohres 12 übergreift, auf ein Außengewinde 66 des Anschlagteils 28 aufgeschraubt ist und sich an den Scheiben 58 des Gehäuses 50 abstützt.The excitation system consisting of the excitation coil 38 and the housing 50 is pushed axially onto the actuation system and axially secured by a plastic union nut 64 which engages over the rear end of the tube 12, is screwed onto an external thread 66 of the stop part 28 and is attached to the disks 58 of the housing 50 supports.

Zur Montage des Hubmagneten wird zunächst das Betätigungssystem mittels des Außengewindes 20 in den Hydraulik-Schieber eingeschraubt, wozu Schlüsselflächen 68 des Polkerns 10 dienen. Anschließend wird das Erregersystem axial auf das Betätigungssystem aufgeschoben, wobei eine Positioniernase 70 des Erregersystems dessen Lage an dem Hydraulik-Schieber fixiert. Anschließend wird die Überwurfmutter 64 aufgeschraubt, die das Erregersystem nach vorn und mit den Scheiben 56 zur Anlage an dem Hydraulik-Schieber drückt. Eine mit den Scheiben 56 verstemmte Lasche 72 des Masseanschlusses 48 stellt dabei die Masseverbindung zwischen Hydraulik-Schieber und Erregersystem her. Abschließend wird eine nicht dargestellte Steckerbuchse auf den Steckersockel 44 und dessen Kontaktstifte 46, 48 aufgesteckt und durch eine Schraube gesichert, die in einen Gewindeeinsatz 74 des Steckersockels 44 eingeschraubt wird.To assemble the lifting magnet, the actuating system is first screwed into the hydraulic slide by means of the external thread 20, for which purpose key surfaces 68 of the pole core 10 are used. The excitation system is then pushed axially onto the actuation system, a positioning lug 70 of the excitation system fixing its position on the hydraulic slide. Then the union nut 64 is screwed on, which presses the excitation system forward and with the washers 56 to bear against the hydraulic slide. A tab 72 of the ground connection 48 caulked with the disks 56 establishes the ground connection between the hydraulic slide and the excitation system. Finally, a socket, not shown, is plugged onto the plug base 44 and its contact pins 46, 48 and secured by a screw which is screwed into a threaded insert 74 of the plug base 44.

Der Hubmagnet ist einfach und kostengünstig herstellbar. Das Gehäuse des Erregersystems besteht im wesentlichen aus Stanz- und Biegeteilen, nämlich dem Gehäuse 50 und den Scheiben 56, 58. Das Betätigungssystem ist vollautomatisch herstellbar, indem Polkern 10, Ring 16 und Rohr 12 zusammengesteckt und vorzugsweise mit Lötpaste gelötet werden, ohne daß eine nachträgliche Bearbeitung notwendig ist. Das Rohr 12 und der Anker 14 werden aus gezogenen Stangen eines weichmagnetischen Materials hergestellt.The lifting magnet is simple and inexpensive to manufacture. The housing of the excitation system consists essentially of stamped and bent parts, namely the housing 50 and the disks 56, 58. The actuation system can be produced fully automatically by plugging together the pole core 10, ring 16 and tube 12 and preferably soldering them with solder paste without that subsequent processing is necessary. The tube 12 and the armature 14 are made from drawn rods of a soft magnetic material.

Der Hubmagnet erlaubt eine einfache Montage. Das Erregersystem kann auch bei druckbeaufschlagtem Betätigungssystem ausgewechselt werden.The lifting magnet allows easy assembly. The excitation system can also be replaced when the actuation system is pressurized.

Claims (15)

Gleichstrom-Hubmagnet mit einem weichmagnetischen Anker, mit einem den Anker führenden weichmagnetischen Rohr, mit einer Trennfuge aus nicht magnetisierbarem Material an dem Rohr, mit einer Erregerspule, mit einem die Erregerspule umschließenden weichmagnetischen Gehäuse und mit einem mittels des Ankers verschiebbaren Betätigungsstift, dadurch gekennzeichnet, daß das Gehäuse (50) ein gestanztes und gerolltes Blechteil ist, das an seiner Längsstoßfuge mit sich gegenseitig hintergreifenden Lappen (52) formschlüssig zusammengehalten ist.DC solenoid with a soft-magnetic armature, with a soft-magnetic tube guiding the armature, with a joint made of non-magnetizable material on the tube, with an excitation coil, with a soft-magnetic housing surrounding the excitation coil and with an actuating pin which can be displaced by means of the armature, characterized in that that the housing (50) is a stamped and rolled sheet metal part which is held together in a form-fitting manner on its longitudinal butt joint with mutually engaging tabs (52). Gleichstrom-Hubmagnet mit einem weichmagnetischen Anker, mit einem den Anker führenden weichmagnetischen Rohr, mit einer Trennfuge aus nicht magnetisierbarem Material an dem Rohr, mit einer Erregerspule, mit einem die Erregerspule umschließenden weichmagnetischen Gehäuse und mit einem mittels des Ankers verschiebbaren Betätigungsstift, dadurch gekennzeichnet, daß die Trennfuge durch einen metallischen Ring (16) gebildet ist, der axial mit dem Rohr (12) zusammengesteckt und mit diesem verbunden ist.DC solenoid with a soft-magnetic armature, with a soft-magnetic tube guiding the armature, with a joint made of non-magnetizable material on the tube, with an excitation coil, with a soft-magnetic housing surrounding the excitation coil and with an actuating pin which can be displaced by means of the armature, characterized in that that the parting line is formed by a metallic ring (16) which is axially connected to the tube (12) and connected to it. Hubmagnet nach Anspruch 2, dadurch gekennzeichnet, daß das Rohr (12) sich in einem weichmagnetischen Polkern (10) fortsetzt und daß der Ring (16) einerseits mit dem Rohr (12) und andererseits mit dem Polkern (10) zusammengesteckt und verbunden ist.Lifting magnet according to claim 2, characterized in that the tube (12) continues in a soft magnetic pole core (10) and that the ring (16) is connected and connected on the one hand to the tube (12) and on the other hand to the pole core (10). Hubmagnet nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Ring (16) mit dem Rohr (12) und dem Polkern (10) durch Löten verbunden ist.Lifting magnet according to claim 2 or 3, characterized in that the ring (16) is connected to the tube (12) and the pole core (10) by soldering. Hubmagnet nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in das von der Trennfuge abgewandte Ende des Rohres (12) ein Anschlagteil (28) eingesetzt und durch einen Sprengring (32) axial gesichert ist.Lifting magnet according to one of the preceding claims, characterized in that a stop part (28) is inserted into the end of the tube (12) facing away from the parting line and is axially secured by a snap ring (32). Hubmagnet nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Rohr (12) ein gezogenes Rohrstück ist.Lifting magnet according to one of the preceding claims, characterized in that the tube (12) is a drawn tube piece. Hubmagnet nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Anker (14) aus gezogenem Material hergestellt ist.Lifting magnet according to one of the preceding claims, characterized in that the armature (14) is made of drawn material. Hubmagnet nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Betätigungsstift (22) einen mehrkantigen Profilquerschnitt aufweist und in einer Bohrung des Polkerns (10) mit kreisrundem Querschnitt geführt ist.Lifting magnet according to one of the preceding claims, characterized in that the actuating pin (22) has a polygonal profile cross section and in a bore of the pole core (10) with a circular cross section is led. Hubmagnet nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Betätigungsstift (22) an seinem inneren Ende (24) über den Querschnitt der Bohrung des Polkerns (10) verformt ist.Lifting magnet according to one of the preceding claims, characterized in that the actuating pin (22) is deformed at its inner end (24) over the cross section of the bore of the pole core (10). Hubmagnet nach Anspruch 1, dadurch gekennzeichnet, daß die Erregerspule (38) von einer Kunststoff-Ummantelung (42) umschlossen ist, an welcher einstückig ein Steckersockel (44) angeformt ist.Lifting magnet according to claim 1, characterized in that the excitation coil (38) is surrounded by a plastic sheathing (42) on which a plug base (44) is integrally formed. Hubmagnet nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (50) an seinen beiden axialen Enden durch eingesetzte Scheiben (56, 58) aus weichmagnetischem Material abgeschlossen ist.Lifting magnet according to claim 1, characterized in that the housing (50) is closed at its two axial ends by inserted washers (56, 58) made of soft magnetic material. Hubmagnet nach Anspruch 11, dadurch gekennzeichnet, daß die beiden Scheiben (56, 58) durch Pakete, bestehend aus mehreren gestanzten Blechscheiben, gebildet sind.Lifting magnet according to claim 11, characterized in that the two disks (56, 58) are formed by packages consisting of a plurality of stamped sheet-metal disks. Hubmagnet nach Anspruch 12, dadurch gekennzeichnet, daß die die Scheiben (56, 58) bildenden Pakete von Blechscheiben mittels Verformungen (60) axial im Gehäuse (50) gesichert sind.Lifting magnet according to Claim 12, characterized in that the packs of sheet metal disks forming the disks (56, 58) are secured axially in the housing (50) by means of deformations (60). Hubmagnet nach Anspruch 11, dadurch gekennzeichnet, daß zum Längenausgleich und zur Abdichtung zwischen die Erregerspule (38, 40) und die Scheiben (56, 58) elastische Dichtungsscheiben (62) in das Gehäuse (50) eingesetzt sind.Lifting magnet according to Claim 11, characterized in that elastic sealing disks (62) are inserted into the housing (50) for length compensation and for sealing between the excitation coil (38, 40) and the disks (56, 58) are. Hubmagnet nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Erregersystem (Erregerspule 38, Spulenträger 40, Kunststoff-Ummantelung 42, Gehäuse 50, Scheiben 56, 58) auf das Betätigungssystem (Polkern 10, Rohr 12, Anker 14) aufschiebbar ist und durch eine Überwurfmutter (64) gehalten ist.Lifting magnet according to one of the preceding claims, characterized in that the excitation system (excitation coil 38, coil support 40, plastic casing 42, housing 50, disks 56, 58) can be pushed onto and through the actuation system (pole core 10, tube 12, armature 14) a union nut (64) is held.
EP92117176A 1992-01-18 1992-10-08 Direct current electromagnetic actuator Withdrawn EP0552416A1 (en)

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DE9200549U DE9200549U1 (en) 1992-01-18 1992-01-18 DC solenoid
DE9200549U 1992-01-18

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503057A1 (en) * 1995-02-01 1996-08-08 Binder Magnete Electromagnetic solenoid with connection socket having adaptor block
WO1999025595A1 (en) * 1997-11-19 1999-05-27 Continental Teves Ag & Co. Ohg Solenoid valve
EP2325850A1 (en) * 2008-09-11 2011-05-25 Kawasaki Jukogyo Kabushiki Kaisha Oil immersed solenoid
US8505874B2 (en) 2008-09-11 2013-08-13 Kawasaki Jukogyo Kabushiki Kaisha Adjusting screw structure of oil immersed solenoid and oil immersed solenoid including the same
CN104505213A (en) * 2013-12-25 2015-04-08 江苏鑫龙化纤机械有限公司 Efficient high-speed direct-current electromagnetic unit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19801201A1 (en) 1998-01-15 1999-07-29 Bso Steuerungstechnik Gmbh Arrangement for emergency manual operation of switching magnets whose armature is movable in a pole tube to one end position by spring force and against spring force to a second end position by magnetic field stimulation
DE19934846A1 (en) * 1999-07-24 2001-01-25 Hydraulik Ring Gmbh Electromagnet and hydraulic valve with an electromagnet
DE102006003987A1 (en) 2006-01-23 2007-08-02 Prettl, Rolf Electromagnet actuator and actuator assembly for actuating a valve assembly

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050663A (en) * 1959-12-24 1962-08-21 Walter J Zipper Solenoid construction
DE2022584A1 (en) * 1970-05-08 1971-12-16 Nass Wilhelm Elekt Fab Small magnet
DE2710645A1 (en) * 1976-03-15 1977-09-22 Jakob Rothenberger Magnet valve armature tube - has lengthways movable armature connected to piston in control block with ferromagnetic core
GB2014795A (en) * 1978-02-20 1979-08-30 Jidosha Kiki Co Electro-mechanical converters and control apparatus for power steering units utilizing the same
DE3105652A1 (en) * 1981-02-17 1982-09-16 Eks Elektromagnetik Dr. Scheuerer Kg, 7143 Vaihingen Valve magnet for direct current
US4368446A (en) * 1978-10-26 1983-01-11 Kabushiki Kaisha Fujikoshi Solenoid
DE3243999A1 (en) * 1982-11-27 1984-05-30 bso Steuerungstechnik GmbH, 6603 Sulzbach "ACTUATING MAGNET, IN PARTICULAR LIFTING MAGNET"
FR2545574A1 (en) * 1983-04-25 1984-11-09 Mesenich Gerhard ELECTRO-MAGNET FOR CONTROLLING A VALVE OR CLAMP
EP0146951A2 (en) * 1983-12-23 1985-07-03 G. W. Lisk Company, Inc. Solenoid construction and method for making the same
DE3705805A1 (en) * 1987-02-24 1988-09-01 Vdo Schindling Method for the connection of an armature to a valve needle and fuel injection valve manufactured according to this method
DE4041416A1 (en) * 1989-12-28 1991-07-04 Aisin Aw Co ELECTROMAGNETIC VALVE

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050663A (en) * 1959-12-24 1962-08-21 Walter J Zipper Solenoid construction
DE2022584A1 (en) * 1970-05-08 1971-12-16 Nass Wilhelm Elekt Fab Small magnet
DE2710645A1 (en) * 1976-03-15 1977-09-22 Jakob Rothenberger Magnet valve armature tube - has lengthways movable armature connected to piston in control block with ferromagnetic core
GB2014795A (en) * 1978-02-20 1979-08-30 Jidosha Kiki Co Electro-mechanical converters and control apparatus for power steering units utilizing the same
US4368446A (en) * 1978-10-26 1983-01-11 Kabushiki Kaisha Fujikoshi Solenoid
DE3105652A1 (en) * 1981-02-17 1982-09-16 Eks Elektromagnetik Dr. Scheuerer Kg, 7143 Vaihingen Valve magnet for direct current
DE3243999A1 (en) * 1982-11-27 1984-05-30 bso Steuerungstechnik GmbH, 6603 Sulzbach "ACTUATING MAGNET, IN PARTICULAR LIFTING MAGNET"
FR2545574A1 (en) * 1983-04-25 1984-11-09 Mesenich Gerhard ELECTRO-MAGNET FOR CONTROLLING A VALVE OR CLAMP
EP0146951A2 (en) * 1983-12-23 1985-07-03 G. W. Lisk Company, Inc. Solenoid construction and method for making the same
DE3705805A1 (en) * 1987-02-24 1988-09-01 Vdo Schindling Method for the connection of an armature to a valve needle and fuel injection valve manufactured according to this method
DE4041416A1 (en) * 1989-12-28 1991-07-04 Aisin Aw Co ELECTROMAGNETIC VALVE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503057A1 (en) * 1995-02-01 1996-08-08 Binder Magnete Electromagnetic solenoid with connection socket having adaptor block
WO1999025595A1 (en) * 1997-11-19 1999-05-27 Continental Teves Ag & Co. Ohg Solenoid valve
EP2325850A1 (en) * 2008-09-11 2011-05-25 Kawasaki Jukogyo Kabushiki Kaisha Oil immersed solenoid
EP2325850A4 (en) * 2008-09-11 2011-11-09 Kawasaki Heavy Ind Ltd Oil immersed solenoid
US8350651B2 (en) 2008-09-11 2013-01-08 Kawasaki Jukogyo Kabushiki Kaisha Oil immersed solenoid
US8505874B2 (en) 2008-09-11 2013-08-13 Kawasaki Jukogyo Kabushiki Kaisha Adjusting screw structure of oil immersed solenoid and oil immersed solenoid including the same
CN104505213A (en) * 2013-12-25 2015-04-08 江苏鑫龙化纤机械有限公司 Efficient high-speed direct-current electromagnetic unit
CN104505213B (en) * 2013-12-25 2017-01-18 江苏鑫龙化纤机械有限公司 Efficient high-speed direct-current electromagnetic unit

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