EP0465813A1 - Actuator unit - Google Patents

Actuator unit Download PDF

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Publication number
EP0465813A1
EP0465813A1 EP19910108620 EP91108620A EP0465813A1 EP 0465813 A1 EP0465813 A1 EP 0465813A1 EP 19910108620 EP19910108620 EP 19910108620 EP 91108620 A EP91108620 A EP 91108620A EP 0465813 A1 EP0465813 A1 EP 0465813A1
Authority
EP
European Patent Office
Prior art keywords
bore
armature
cylinder
magnetic
actuating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19910108620
Other languages
German (de)
French (fr)
Other versions
EP0465813B1 (en
Inventor
Jörg Dipl.-Ing. Siebert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0465813A1 publication Critical patent/EP0465813A1/en
Application granted granted Critical
Publication of EP0465813B1 publication Critical patent/EP0465813B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • 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
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

Definitions

  • the invention relates to an actuating device according to the type of the main claim.
  • Such a known actuating device according to DE-OS 33 00 437 has the disadvantage that the magnetic resistance is high when the magnetic flux passes from the pressure pipe to the armature, and therefore the magnetic force is often not sufficient for a given magnetic flow. An increase in the magnetic force can only be achieved with these adjusting devices by increasing the magnetic flow.
  • the actuating device according to the invention with the characterizing features of the main claim has the advantage that the described overall design of the armature significantly reduces the total magnetic resistance when the magnetic flux from the pressure pipe to the armature is transferred. As a result, the magnetic force is higher for a given magnetic flood. At the same time, the anchor mass to be moved is significantly reduced, which contributes to an increase in the actuating speed. With pulling magnets, the in Hollow-drilled armature arranged soft magnetic cylinders can be used to guide and support the plunger.
  • a magnet coil 16 is arranged in the bore 14, the outer diameter of which corresponds to the bore 14 and the inner diameter of the bore 13. The coil 16 is shorter than the bore 14.
  • a pressure tube 18 projects through the coil 16 from the open side of the housing 11 into the bore 13 without reaching the end plate 10.
  • the pressure tube 18 is designed such that its end opposite the end plate 10 fixes the position of the coil 16 on the one hand and on the other hand serves as a connection to a valve (not shown) to be controlled.
  • the pressure tube 18 is composed of three tube parts 20, 21, 22, of which the tube parts 20 and 22 are made of magnetic material and the tube part 21 is made of non-magnetic material.
  • a continuous, axial bore 24 is formed in the pressure tube parts 20, 21 and continues in the tube part 22 as a bore 25 of small diameter.
  • the end of the bore facing the connection plate 10 is designed as a threaded bore 25A.
  • a cylindrical armature 27 which has an axial blind bore 28 extending from the valve side.
  • An axial blind bore 29 is also formed in the armature end facing the connecting plate 10, in which a compression spring 30 is supported. It rests with its opposite end on an adjusting screw 32 located in the bore 25, 25A, which closes the pressure pipe 18 in a pressure-tight manner with a sealing ring 34 located in an annular groove 33.
  • a cylinder 36 made of soft magnetic material projects into the blind bore 28 of the armature 27 and is supported with a flange-like edge 37 in a corresponding recess 38 of the pressure tube part 20.
  • the cylinder 36 has a continuous axial bore 39, which serves to receive and guide a plunger 40 loosely attached in the armature, with the z.
  • the valve spool of a directional control valve can be actuated.
  • a bore 43 is formed in the armature 27, which connects the blind bores 28 and 29 to one another. Together with a bore 42 in the flange plate 37, which is connected to the valve in a suitable manner, it serves to equalize the pressure in the switching unit.
  • the magnetic flux is not only introduced into the armature 27 via the outer circumference, the pressure tube 18, as is customary.
  • the magnetic flux can enter the armature from the inside through the cylinder 36 located centrally in the pressure tube. This significantly reduces the magnetic resistance when the magnetic flux enters the armature. The magnetic force is thus increased while the flow remains constant. At the same time, the anchor mass to be moved is significantly reduced.

Abstract

In order to reduce the magnetic resistance, the armature (27) of an electromagnet is provided with a hole (28) into which a soft-magnetic cylinder (36) projects. In consequence, the magnetic flux can enter the armature from the outside and the inside. The cylinder (36) has a continuous hole (28) through which a plunger (40) which is arranged on the piston can project in order to operate a valve body. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Stelleinrichtung nach der Gattung des Hauptanspruchs. Eine derartige bekannte Stelleinrichtung nach der DE-OS 33 00 437 hat den Nachteil, daß der magnetische Widerstand bei Übertritt des magnetischen Flusses vom Druckrohr zum Anker hoch ist, und daß daher die Magnetkraft bei gegebener magnetischer Durchflutung oftmals nicht ausreicht. Eine Erhöhung der Magnetkraft kann bei diesen Stelleinrichtungen nur durch Vergrößerung der magnetischen Durchflutung erreicht werden.The invention relates to an actuating device according to the type of the main claim. Such a known actuating device according to DE-OS 33 00 437 has the disadvantage that the magnetic resistance is high when the magnetic flux passes from the pressure pipe to the armature, and therefore the magnetic force is often not sufficient for a given magnetic flow. An increase in the magnetic force can only be achieved with these adjusting devices by increasing the magnetic flow.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Stelleinrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß durch die beschriebene Ausbildung des Ankers der magnetische Gesamtwiderstand bei Übertritt des magnetischen Flusses vom Druckrohr zum Anker deutlich reduziert wird. Dadurch ist die Magnetkraft bei gegebener magnetischer Durchflutung höher. Gleichzeitig wird die zu bewegende Ankermasse deutlich reduziert, was zu einer Erhöhung der Stellgeschwindigkeit beiträgt. Bei ziehend wirkenden Magneten kann der im hohlgebohrten Anker angeordnete weichmagnetische Zylinder zur Führung und Lagerung des Stößels genutzt werden.The actuating device according to the invention with the characterizing features of the main claim has the advantage that the described overall design of the armature significantly reduces the total magnetic resistance when the magnetic flux from the pressure pipe to the armature is transferred. As a result, the magnetic force is higher for a given magnetic flood. At the same time, the anchor mass to be moved is significantly reduced, which contributes to an increase in the actuating speed. With pulling magnets, the in Hollow-drilled armature arranged soft magnetic cylinders can be used to guide and support the plunger.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung näher erläutert. Letztere zeigt einen Längsschnitt durch einen Proportionalmagneten.An embodiment of the invention is explained in more detail in the following description and drawing. The latter shows a longitudinal section through a proportional magnet.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein mit einer Abschlußplatte 10 einseitig verschlossenes, etwa becherförmiges Gehäuse 11 eines Proportionalmagneten 12 weist eine von der Abschlußplatte 10 ausgehende mittige Bohrung 13 auf, die in eine achsgleich verlaufende Bohrung 14 größeren Durchmessers übergeht. In der Bohrung 14 ist eine Magnetspule 16 angeordnet, deren Außendurchmesser der Bohrung 14 und deren Innendurchmesser der Bohrung 13 entspricht. Die Spule 16 ist kürzer als die Bohrung 14.An approximately cup-shaped housing 11 of a proportional magnet 12, which is closed on one side with an end plate 10, has a central bore 13 extending from the end plate 10, which merges into a bore 14 of larger diameter that runs in the same axis. A magnet coil 16 is arranged in the bore 14, the outer diameter of which corresponds to the bore 14 and the inner diameter of the bore 13. The coil 16 is shorter than the bore 14.

Durch die Spule 16 hindurch ragt von der offenen Seite des Gehäuses 11 her ein Druckrohr 18 in die Bohrung 13, ohne die Abschlußplatte 10 zu erreichen. Das Druckrohr 18 ist so ausgebildet, daß sein der Abschlußplatte 10 gegenüberliegendes Ende einerseits die Spule 16 in ihrer Lage fixiert und andererseits als Anschluß an ein nicht dargestelltes, zu steuerndes Ventil dient. Das Druckrohr 18 setzt sich aus drei Rohrteilen 20, 21, 22 zusammen, von denen die Rohrteile 20 und 22 aus magnetischem Werkstoff und das Rohrteil 21 aus unmagnetischem Werkstoff bestehen.A pressure tube 18 projects through the coil 16 from the open side of the housing 11 into the bore 13 without reaching the end plate 10. The pressure tube 18 is designed such that its end opposite the end plate 10 fixes the position of the coil 16 on the one hand and on the other hand serves as a connection to a valve (not shown) to be controlled. The pressure tube 18 is composed of three tube parts 20, 21, 22, of which the tube parts 20 and 22 are made of magnetic material and the tube part 21 is made of non-magnetic material.

In den Druckrohrteilen 20, 21 ist eine durchgehende, axiale Bohrung 24 ausgebildet, die sich im Rohrteil 22 als Bohrung 25 geringen Durchmessers fortsetzt. Das der Anschlußplatte 10 zugewandte Ende der Bohrung ist als Gewindebohrung 25A ausgeführt. In der Bohrung 24 ist mit Spiel ein zylindrischer Anker 27 geführt, der eine von der Ventilseite ausgehende axiale Sackbohrung 28 aufweist. In dem zur Anschlußplatte 10 weisenden Ankerende ist ebenfalls eine axiale Sackbohrung 29 ausgebildet, in der sich eine Druckfeder 30 abstützt. Sie liegt mit ihrem entgegengesetzten Ende an einer in der Bohrung 25, 25A befindlichen Einstellschraube 32 an, die mit einem in einer Ringnut 33 befindlichen Dichtring 34 das Druckrohr 18 druckdicht verschließt.A continuous, axial bore 24 is formed in the pressure tube parts 20, 21 and continues in the tube part 22 as a bore 25 of small diameter. The end of the bore facing the connection plate 10 is designed as a threaded bore 25A. In hole 24 is guided with play a cylindrical armature 27 which has an axial blind bore 28 extending from the valve side. An axial blind bore 29 is also formed in the armature end facing the connecting plate 10, in which a compression spring 30 is supported. It rests with its opposite end on an adjusting screw 32 located in the bore 25, 25A, which closes the pressure pipe 18 in a pressure-tight manner with a sealing ring 34 located in an annular groove 33.

In die Sackbohrung 28 des Ankers 27 ragt ein aus weichmagnetischem Werkstoff bestehender Zylinder 36, der sich mit einem flanschartigen Rand 37 in einer entsprechenden Aussparung 38 des Druckrohrteiles 20 abstützt. Der Zylinder 36 weist eine durchgehende axiale Bohrung 39 auf, die zur Aufnahme und Führung eines im Anker lose angebrachten Stößels 40 dient, mit dem z. B. der Ventilschieber eines Wegeventils betätigbar ist.A cylinder 36 made of soft magnetic material projects into the blind bore 28 of the armature 27 and is supported with a flange-like edge 37 in a corresponding recess 38 of the pressure tube part 20. The cylinder 36 has a continuous axial bore 39, which serves to receive and guide a plunger 40 loosely attached in the armature, with the z. B. the valve spool of a directional control valve can be actuated.

Im Anker 27 ist eine Bohrung 43 ausgebildet, die die Sackbohrungen 28 und 29 miteinander verbindet. Zusammen mit einer in der Flanschplatte 37 befindlichen Bohrung 42, die mit dem Ventil in geeigneter Weise in Verbindung steht, dient sie dem Druckausgleich in der Schalteinheit.A bore 43 is formed in the armature 27, which connects the blind bores 28 and 29 to one another. Together with a bore 42 in the flange plate 37, which is connected to the valve in a suitable manner, it serves to equalize the pressure in the switching unit.

Durch den in den hohlgebohrten Anker 27 ragenden weichmagnetischen Zylinder 36 wird der magnetische Fluß nicht nur wie üblich über den äußeren Umfang, das Druckrohr 18, in den Anker 27 eingeleitet. Zusätzlich zum äußeren Magnetfluß kann durch den zentral im Druckrohr liegenden Zylinder 36 der Magnetfluß von innen in den Anker eintreten. Damit wird der magnetische Widerstand bei Übertritt des Magnetflusses in den Anker deutlich reduziert. Die Magnetkraft ist somit bei gleichbleibender Durchflutung erhöht. Gleichzeitig ist die zu bewegende Ankermasse deutlich reduziert.Due to the soft magnetic cylinder 36 protruding into the hollow drilled armature 27, the magnetic flux is not only introduced into the armature 27 via the outer circumference, the pressure tube 18, as is customary. In addition to the external magnetic flux, the magnetic flux can enter the armature from the inside through the cylinder 36 located centrally in the pressure tube. This significantly reduces the magnetic resistance when the magnetic flux enters the armature. The magnetic force is thus increased while the flow remains constant. At the same time, the anchor mass to be moved is significantly reduced.

Claims (4)

Elektromagnetische Stelleinrichtung, in deren Gehäuse (11) ein einen Anker (27) eines Elektromagneten aufnehmendes Druckrohr (18) angeordnet ist, der beispielsweise den Steuerschieber eines Wegeventils betätigt, dadurch gekennzeichnet, daß der Anker (27) eine in seiner Längsachse verlaufende Bohrung (28) aufweist, in die ein Zylinder (36) aus weichmagnetischem Material ragt, daß der Zylinder (36) axial durchbohrt ist, und daß durch die Bohrung (39) ein mit dem Anker (27) zusammenwirkender Stößel (40) ragt.Electromagnetic actuating device, in the housing (11) of which an armature (27) of an electromagnet receiving pressure tube (18) is arranged, which actuates, for example, the control slide of a directional control valve, characterized in that the armature (27) has a bore (28 ) into which a cylinder (36) made of soft magnetic material protrudes, that the cylinder (36) is axially pierced, and that a plunger (40) cooperating with the armature (27) projects through the bore (39). Elektromagnetische Stelleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Zylinder (36) einen flanschartigen Rand (37) aufweist, der passend in einer Bohrung (38) liegt, welche im Druckrohr (18) ausgebildet ist.Electromagnetic actuating device according to claim 1, characterized in that the cylinder (36) has a flange-like edge (37) which fits in a bore (38) which is formed in the pressure tube (18). Elektromagnetische Stelleinrichtung nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß in dem Flansch (37) eine diesen durchdringende Bohrung (42) angeordnet ist.Electromagnetic actuating device according to claim 1 and / or 2, characterized in that a bore (42) penetrating the flange (37) is arranged in the flange (37). Elektromagnetische Stelleinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Anker (27) eine Bohrung (43) aufweist, die seine beiden Stirnflächen miteinander verbindet.Electromagnetic actuating device according to one of claims 1 to 3, characterized in that the armature (27) has a bore (43) which connects its two end faces to one another.
EP91108620A 1990-07-06 1991-05-28 Actuator unit Expired - Lifetime EP0465813B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021623 1990-07-06
DE4021623A DE4021623A1 (en) 1990-07-06 1990-07-06 ACTUATOR

Publications (2)

Publication Number Publication Date
EP0465813A1 true EP0465813A1 (en) 1992-01-15
EP0465813B1 EP0465813B1 (en) 1994-09-21

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EP91108620A Expired - Lifetime EP0465813B1 (en) 1990-07-06 1991-05-28 Actuator unit

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EP (1) EP0465813B1 (en)
DE (2) DE4021623A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1855296A2 (en) * 2006-05-11 2007-11-14 Robert Bosch GmbH Electromagnet
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
CN105575587A (en) * 2014-10-15 2016-05-11 上海超诚电子科技有限公司 Novel electromagnet and electromagnet drive device for fire extinguishing system
EP3651167A1 (en) * 2018-11-09 2020-05-13 SVM Schultz Verwaltungs-GmbH & Co. KG Electromagnetic actuator with bearing element

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014002523A1 (en) * 2014-02-22 2015-08-27 Hydac Electronic Gmbh Electromagnetic actuator
DE102021112642A1 (en) * 2021-05-17 2022-11-17 Svm Schultz Verwaltungs-Gmbh & Co. Kg Electromagnetic actuator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300437A1 (en) * 1982-11-10 1984-05-10 Robert Bosch Gmbh, 7000 Stuttgart Actuating device
DE3437106A1 (en) * 1983-10-14 1985-05-02 Equipements Automobiles Marchal S.A., Issy-les-Moulineaux ELECTROMAGNETIC ACTUATOR
DE3829676A1 (en) * 1988-09-01 1990-03-15 Olympia Aeg SUBMERSIBLE MAGNET, AND THE USE THEREOF AS A PRINTING HAMMER IN A PRINTING HAMMER DEVICE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300437A1 (en) * 1982-11-10 1984-05-10 Robert Bosch Gmbh, 7000 Stuttgart Actuating device
DE3437106A1 (en) * 1983-10-14 1985-05-02 Equipements Automobiles Marchal S.A., Issy-les-Moulineaux ELECTROMAGNETIC ACTUATOR
DE3829676A1 (en) * 1988-09-01 1990-03-15 Olympia Aeg SUBMERSIBLE MAGNET, AND THE USE THEREOF AS A PRINTING HAMMER IN A PRINTING HAMMER DEVICE

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1855296A2 (en) * 2006-05-11 2007-11-14 Robert Bosch GmbH Electromagnet
EP1855296A3 (en) * 2006-05-11 2009-03-04 Robert Bosch GmbH Electromagnet
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
CN105575587A (en) * 2014-10-15 2016-05-11 上海超诚电子科技有限公司 Novel electromagnet and electromagnet drive device for fire extinguishing system
CN105575587B (en) * 2014-10-15 2018-10-19 上海超诚电子科技有限公司 New electromagnet and fire extinguishing system electromagnetic actuator device
EP3651167A1 (en) * 2018-11-09 2020-05-13 SVM Schultz Verwaltungs-GmbH & Co. KG Electromagnetic actuator with bearing element
US11371626B2 (en) 2018-11-09 2022-06-28 Svm Schultz Verwaltungs-Gmbh & Co. Kg Electromagnetic actuator with bearing element

Also Published As

Publication number Publication date
EP0465813B1 (en) 1994-09-21
DE59103014D1 (en) 1994-10-27
DE4021623A1 (en) 1992-01-09

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