EP0463590B1 - Actuator for adjusting two self-holding positions - Google Patents

Actuator for adjusting two self-holding positions Download PDF

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Publication number
EP0463590B1
EP0463590B1 EP91110334A EP91110334A EP0463590B1 EP 0463590 B1 EP0463590 B1 EP 0463590B1 EP 91110334 A EP91110334 A EP 91110334A EP 91110334 A EP91110334 A EP 91110334A EP 0463590 B1 EP0463590 B1 EP 0463590B1
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EP
European Patent Office
Prior art keywords
permanent magnet
coil
magnetic
arrangement
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91110334A
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German (de)
French (fr)
Other versions
EP0463590A2 (en
EP0463590A3 (en
Inventor
Franz Dipl.-Ing. Bierbrauer
Horst Dipl.-Ing. Landau
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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Filing date
Publication date
Priority claimed from DE19904020275 external-priority patent/DE4020275C2/en
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of EP0463590A2 publication Critical patent/EP0463590A2/en
Publication of EP0463590A3 publication Critical patent/EP0463590A3/en
Application granted granted Critical
Publication of EP0463590B1 publication Critical patent/EP0463590B1/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
    • H01F7/14—Pivoting armatures

Definitions

  • the invention relates to an actuator for setting two self-holding positions, which can be adjusted in one or the other direction of current supply by electrical energization of an electromagnet arrangement which can be reversed and has a cylindrical magnet coil, two magnetically opposite poles of the magnet coil and at least one pole of a magnet coil movable relative to the magnet coil
  • the permanent magnet arrangement cooperate with one another and, depending on the direction of electrical current flow to the magnetic coil, one or the other position seeks to take up a position relative to one another, and the poles of the magnetic coil are designed as holding elements made of magnetizable material or are provided with holding elements and said pole of the permanent magnet arrangement is in each of the two self-holding layers approximates to one of the holding elements.
  • the electromagnet arrangement has a cylindrical coil in which an armature is displaceably arranged in the manner of a piston. By means of a spring, this armature is pushed into an end position in which the armature protrudes somewhat from the coil. This end position can thus be held in the currentless state of the coil by the force of the spring mentioned. In the other end position, the armature is held by a stationary holding magnet, against which the armature rests in this position. In order to adjust the armature, the coil is connected to an electrical voltage source in one or the other current direction. This allows the armature to be pushed from one end position against the force of the spring into the other end position by the magnetic forces generated by the coil. Now the coil is in the opposite direction electrically energized, the magnetic field generated by it counteracts the magnetic field of the holding magnet, so that the spring is able to return the armature to one end position.
  • the linear movement of the armature can, if appropriate, be converted into a rotary movement by corresponding gear elements, for example by a toothed rack which interacts with a pinion and is connected to the armature.
  • an actuator is also known in which two magnetically opposite poles of an electromagnet arrangement and at least one pole of a permanent magnet arrangement movable relative to the electromagnet arrangement cooperate with one another and, depending on the direction of electrical current supply to the magnet coil, seek to assume one or the other position relative to one another .
  • the poles of the magnetic coil are designed as a holding element made of magnetizable material, the pole of the permanent magnet arrangement in each of the two self-holding layers approaching at most one of the holding elements.
  • the object of the invention is to provide a structurally particularly simple actuator, and larger actuating forces should also be achievable.
  • the permanent magnet arrangement is arranged within the magnetic field which can be generated by the magnetic coil and is rotatably adjustable between the two self-holding positions and the magnetic north-south axis of the permanent magnet extends transversely to the axis of rotation and in all positions of the permanent magnet has a directional component transverse to the direction of the magnetic field of the magnetic coil, and that the magnetic coil is axially penetrated by a soft magnetic rod and the rod protrudes from one end of the magnetic coil or connects there to a soft magnetic extension and at the other end of the Solenoid is firmly connected to a housing wall made of soft magnetic material of a housing, the housing wall with a wall area or extension protruding beyond the one end of the magnet coil and the permanent magnet at this front end of the magnet coil between the rod or the rod-side extension and the wall area or the housing-side extension is arranged.
  • the magnetic north-south axis of the permanent magnet extends transversely to the axis of rotation and in all positions of the permanent magnet has a directional component transverse to the direction of the magnetic field of the magnet coil, the magnetic field that can be generated by the electromagnet arrangement with both poles of the permanent magnet can generate high actuating forces cooperate because there is a strong concentration of the magnetic flux between the poles of the electromagnet arrangement and the permanent magnet.
  • the layers to be set can be designed to be self-retaining in a particularly simple manner.
  • the poles of the permanent magnet approach each other relatively strongly to the poles of the electromagnet arrangement. If the electromagnet arrangement now has soft-magnetic pole parts or pieces, the poles of the permanent magnet seek to magnetically attract these parts or pieces even when the electromagnet arrangement is kept electrically currentless.
  • the holding forces are greater the closer the poles of the permanent magnet can approach the pole parts or pieces mentioned.
  • the end of the soft magnetic rod protruding from one end of the coil or the extension continuing the rod on the one hand and the extension of the housing wall on the other hand form the pole parts or pieces of the electromagnet arrangement. This enables a particularly compact structural unit to be achieved.
  • the housing can be essentially closed and cylindrical, in which case one end wall of the housing forms the housing wall fixedly connected to the rod and the other end wall forms the wall area projecting beyond the one end of the magnet coil.
  • a plurality, for example two or three, of the housing wall protruding extensions of the housing wall can be arranged on the wall of the cup-shaped housing, these wall extensions in the Usually distributed uniformly over the circumference of the housing. In this way, several pole parts or pieces of the same name are formed on the housing. This makes it possible to arrange several separate permanent magnets each between an extension of the wall of the housing and the free end of the rod or the extension adjoining the rod.
  • the multiple arrangement of the permanent magnets can be advantageous if the actuator is to be used for handling devices with a gripper function.
  • Each permanent magnet can be drive-coupled with a separate gripper element.
  • poles of the electromagnet arrangement or their pole parts or pieces cooperate only with one pole or several poles of the same name of the permanent magnet arrangement.
  • the permanent magnet arrangement can be designed as an eccentric, on which the pole or poles of one magnetic polarity are arranged eccentrically to the axis of rotation, in such a way that they can interact with the poles or pulse shoes or pieces of the electromagnet arrangement ,
  • the poles or the pole pieces or pieces of the electromagnet arrangement in turn consist of soft magnetic material so that they are able to interact magnetically with the permanent magnet arrangement to secure the positions to be set.
  • the actuator shown in Figures 1 and 2 has a cylindrical magnetic coil 1, preferably with a relatively short axial length and a comparatively large diameter.
  • the windings of the magnet coil 1 are arranged on a plastic support part 2, on one end of which a base 3 is formed, which on the one hand for fastening the magnet coil 1 on a mounting surface 4 and on the other hand for holding the electrical connections 5 of the magnet coil 1 embedded in it serves.
  • the magnet coil 1 is axially penetrated by a soft magnetic rod 6, which protrudes at one end from the magnet coil 1 with an extension 7, which is arranged eccentrically and has a flattened upper side.
  • the rod 6 is fixed, for example by riveting, to the bottom of a cup-shaped housing 8 which surrounds the magnet coil 1 and is made of soft magnetic material.
  • the peripheral wall of the housing 8 protrudes on the one end face of the housing 8 which is not covered Magnetic coil 1 with an extension 9, which has approximately the same width and length as the extension 7 of the rod 6, beyond the left end face of the magnetic coil 1 in FIG. 1.
  • the extensions 7 and 9 form magnetically opposite pole parts or pieces, between which a comparatively strong magnetic field extends, in particular if the distance between the extensions 7 and 9 is small.
  • a double-armed lever 10 made of non-magnetizable material, preferably plastic, is rotatably arranged on an axis 11 which is parallel to the coil axis but is eccentric to the coil axis and which connects the lever 10 to a part to be driven, for example a roller 12, in terms of drive.
  • a permanent magnet 13 is embedded or held in the lever 10 within the magnetic field that can be generated between the extensions 7 and 9 or held in place by clamping.
  • the magnetic north-south axis of the permanent magnet 13 lies approximately in the example shown in a central position of the lever 10 transverse to the direction of the magnetic field that can be generated between the extensions 7 and 9.
  • the actuator shown works as follows:
  • This magnetic field interacts with the permanent magnet 13, a torque being exerted on the permanent magnet 13, which attempts to adjust the permanent magnet 13 such that its magnetic north-south direction is antiparallel to the magnetic north-south direction of the between the extensions 7 and 9 generated magnetic field.
  • the lever arms of the lever 10 cooperate abutly with the extension 7 of the rod 6 - for this purpose the lever arms have corresponding abutment surfaces 10 '- an exactly antiparallel orientation of the magnetic north-south direction of the permanent magnet 13 relative to the magnetic north-south Prevents the direction of the magnetic field generated between the extensions 7 and 9, ie in both reachable end positions of the lever 10 these north-south directions form an angle of for example 45 o in front view of the magnet coil 1.
  • both end positions are automatically held because the poles of the permanent magnet 13 seek to magnetically attract the respectively adjacent extensions 7 and 9 and because the respective distances in the end positions of the lever 10 reach a (relative) minimum.
  • the lever 10 or a instead arranged support part for the permanent magnet 13 should be designed so that direct contact between the permanent magnet 13 and the extension 7 and / or 9 is prevented.
  • the magnetic holding forces acting in the end positions of the lever 10, which are generated by the interaction of the permanent magnet 13 with the extensions 7 and 9, are reduced, with the result that it is sufficient to apply relatively weak electrical currents to the magnet coil 1 to enable switching of the lever 10 between the two end positions.
  • the extensions 7 and 9 should face each other with relatively large areas, so that the magnetic field between the extensions 7 and 9 "envelops" the permanent magnet 13.
  • the permanent magnet should have the largest possible cross section transverse to its magnetic north-south axis, the diameter of the cross section possibly being greater than the length of the permanent magnet in the direction of its magnetic axis.
  • the permanent magnet 13 has a rectangular or - preferably a square cross section and is arranged such that the axis of rotation 11 is aligned parallel to two sides of the rectangle or square.
  • the lever 10 or a corresponding support part for the permanent magnet 13 can also have a different shape.
  • the abutment surfaces 10 'with a different V-shape can be arranged relative to one another in order to enable a rotational stroke between the end positions which is greater or less than 90 °.
  • lever 10 can also cooperate abruptly with parts separated from the extensions 7 and 9.
  • levers 10 and the associated permanent magnets 13 are also possible.
  • a plurality of extensions 9 of the peripheral wall of the housing 8 are arranged, in which case a lever 10 with a permanent magnet 13 can then be arranged between each extension 9 and the extension 7 in the manner shown in FIGS. 1 and 2.
  • the solenoid 1 is energized, a corresponding number of levers 10 are then adjusted simultaneously.
  • the magnet coil 1 is accommodated in a practically completely closed housing 8, the cylindrical circumferential wall of which encloses the coil 1 practically without a gap.
  • One end wall 8 'of the housing 8 is arranged directly next to the facing end of the coil 1 and is fixedly connected to a rod 6 which passes axially through the coil 1 and which, like the housing 8, is made of soft magnetic material.
  • the rod 6 extends up to the top end face of the coil 1 in FIG. 3.
  • the other end wall 8 ′′ of the housing 8 is arranged at a distance from the facing end face of the coil 8 and the facing end of the rod 6.
  • an extension projecting toward the rod 6 can be arranged on the end wall 8 ', deviating from the illustration in FIG. 3, the cross section of which can correspond to the cross section of the rod 6.
  • the end wall 8 ′′ or the extension arranged thereon on the one hand and the end of the rod 6 facing the end wall 8 ′′ on the other hand form the poles or pole pieces of the electromagnet arrangement, i.e. A magnetic field is generated between the rod 6 and the end wall 8 ′′ or the extension arranged thereon, the strength of which is dependent on the strength of the electrical current passing through the magnet coil 1.
  • an axis 11 with this axis 11 is located by means of the axis 11, which is rotatably mounted in openings in the peripheral wall of the housing 8
  • Rotationally connected double-armed lever 10 made of non-magnetizable material, for example plastic, is arranged.
  • the arms of the lever 10 are dimensioned such that they interact with the housing end wall 8 '' or with the rod 6 in such a way that the lever 10 can assume two end positions in which the magnetic north-south direction of the permanent magnet 13 is inclined is aligned with the axis of the magnetic coil 1.
  • the permanent magnet 13 and thus the lever 10 then seek to assume one or the other end position. Even when the coil is switched off, the end positions are automatically held due to the magnetic attraction forces which are active between the poles of the permanent magnet 13 and the housing end wall 8 ′′ or the rod 6.
  • the actuator shown in FIGS. 5 and 6 has a cylindrical magnetic coil 1 with a core 20 made of soft magnetic material.
  • the magnet coil 1 can be connected to a DC voltage source, not shown, in a manner which can be reversed, so that the coil 1 can be supplied with current in two opposite directions.
  • the magnetic north-south direction of the core 20 in FIG. 1 then points from right to left or from left to right.
  • Each end of the core 20 is connected to a holding element 23 'or 23' 'which, like the core 20, is made of soft magnetic material.
  • the holding elements 23 'and 23'' are designed as sheet metal parts, which essentially consist of a plate arranged at the front end of the magnet coil 1 with a plate plane radial to the coil axis.
  • the holding elements 23 'and 23'' have at their lower edges in FIG. 5 angled flanges for fastening on an assembly level.
  • tabs 24' and 24 '' which are directed towards one another are arranged in a common plane and which can be offset to the side relative to the axis of the magnetic coil 1 according to FIG. 6.
  • the eccentric part 25 consists of non-magnetizable material, for example plastic.
  • the eccentric part 25 has a segment 25 'in the form of a segment of a circle, by means of which the possible rotational stroke of the eccentric part 25 in cooperation with the tabs 24' and 24 '' is limited, i.e. In one end position of the eccentric part 25, the tab 24 'acts as a stop, while the eccentric part 25 strikes the tab 24' 'in its other end position.
  • section 25 'of the eccentric part 25 two rod-shaped permanent magnets 27' and 27 '' are embedded, in such a way that on the radial end faces of the section 25 'of the eccentric part 25 poles of the same magnetic polarity - in the example of FIG. 5, the magnetic N -Pole - are arranged.
  • poles of the opposite magnetic polarity of the permanent magnets 27 'and 27' ' can abut one another approximately in the radial central plane of the section 25' of the eccentric part 25.
  • the eccentric part 25 is connected in a rotationally fixed manner to an organ to be driven, in the example of FIGS. 5 and 6 to a segment roller 12 of a display panel, a shaft bearing 29 common to both parts being arranged axially between the segment roller 12 and the eccentric part 25 .
  • the possible end positions of the eccentric part 25 are secured when the magnet coil 1 is de-energized by the permanent magnets 27 ′ or 27 ′′ interacting with the tabs 24 ′ or 24 ′′.
  • the end position shown in FIG. 5 is held by the permanent magnet 27 ', which with its one pole (N pole) faces the tab 24' and tries to attract it. Since the distance between the tab 24 'and the facing pole of the permanent magnet 27' is significantly smaller than the corresponding distance between the tab 24 '' and the facing pole of the permanent magnet 27 ", those between the permanent magnet 27 'and the tab 24' acting magnetic forces significantly larger than those between the permanent magnet 27 "and the tab 24".
  • the tabs 24 ′ and 24 ′′ form magnetic poles of opposite magnetic polarity, since the holding elements 23 ′ and 23 ′′ consist of magnetizable material and are in a magnetically conductive connection with the core 20 of the magnet coil 1.
  • the two end positions of the eccentric part 25 can be set by appropriate electrical polarity of the electrical connections of the magnetic coil 1 with the DC voltage source.
  • the solenoid 1 can be switched off.
  • the permanent magnets 27 'and 27' ' can also be embedded in section 25' of the eccentric part 25 in such a way that they are in the end positions of the eccentric part 25 on the tabs 24 'and 24, respectively '' lie on. As a result, the holding forces securing the end positions of the eccentric part 25 can be increased.
  • FIG. 7 differs from the embodiment of FIGS. 5 and 6 only in that the eccentric part 25 is designed as a permanent magnet, the section 25 ′ being the pole of one polarity (N pole) and that of the shaft 26 adjacent area forms the pole of opposite magnetic polarity.
  • the holding elements 23 'and 23 "or tabs 24' and 24" formed on them cooperate with the eccentric part 25 or the slide 30 in the manner of stops.
  • stops which are connected to the organ driven by the actuator e.g. interact with the segment roller 12.
  • the holding elements 23 'and 23' 'or the tabs 24' and 24 '' are not required as mechanical stops.
  • Hall generators or other sensors can be arranged which respond to the magnetic field of the permanent magnets in these positions.
  • the positions to be set can be maintained with great force even when the electromagnet is de-energized, a greatly increased holding force possibly being possible by energizing the electromagnet, specifically in both positions.
  • a short current surge is sufficient to switch between the two positions, i.e. the energy consumption is low.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)
  • Seal Device For Vehicle (AREA)
  • Vehicle Body Suspensions (AREA)
  • Particle Accelerators (AREA)
  • Fluid-Damping Devices (AREA)
  • Prostheses (AREA)

Abstract

A permanent magnet arrangement (13), movable, for example rotatable, between two limit positions, is arranged inside a magnetic field, which can be generated between pole pieces (7, 9), of an electromagnetic arrangement (1). When current flows through the electromagnetic arrangement (1), the permanent magnet arrangement (13) is forced into the one limit position or the other, depending on the direction of the electric current. <IMAGE>

Description

Die Erfindung betrifft einen Stellantrieb zur Einstellung von zwei selbsthaltenden Lagen, welche durch elektrische Bestromung einer elektrisch umpolbaren und eine zylindrische Magnetspule aufweisenden Elektromagnetenanordnung in der einen oder anderen Bestromungsrichtung einstellbar sind, wobei zwei magnetisch entgegengesetzte Pole der Magnetspule sowie zumindest ein Pol einer relativ zur Magnetspule beweglichen Permanentmagnetanordnung miteinander zusammenwirken und je nach elektrischer Bestromungsrichtung der Magnetspule die eine oder andere Lage relativ zueinander einzunehmen suchen, und die Pole der Magnetspule als Halteelemente aus magnetisierbarem Material ausgebildet bzw. mit Halteelementen versehen sind und sich der genannte Pol der Permanentmagnetanordnung in jeder der beiden selbsthaltenden Lagen maximal an eines der Halteelemente annähert.The invention relates to an actuator for setting two self-holding positions, which can be adjusted in one or the other direction of current supply by electrical energization of an electromagnet arrangement which can be reversed and has a cylindrical magnet coil, two magnetically opposite poles of the magnet coil and at least one pole of a magnet coil movable relative to the magnet coil The permanent magnet arrangement cooperate with one another and, depending on the direction of electrical current flow to the magnetic coil, one or the other position seeks to take up a position relative to one another, and the poles of the magnetic coil are designed as holding elements made of magnetizable material or are provided with holding elements and said pole of the permanent magnet arrangement is in each of the two self-holding layers approximates to one of the holding elements.

Bei einem auf dem Markt erhältlichen Stellantrieb besitzt die Elektromagnetanordnung eine zylinderförmige Spule, in der ein Anker nach Art eines Kolbens verschiebbar angeordnet ist. Mittels einer Feder wird dieser Anker in eine Endlage gedrängt, in der der Anker etwas aus der Spule herausragt. Somit kann diese Endlage im stromlosen Zustand der Spule durch die Kraft der genannten Feder gehalten werden. In der anderen Endlage wird der Anker durch einen stationären Haftmagneten gehalten, an dem der Anker in dieser Stellung anliegt. Zur Verstellung des Ankers wird die Spule jeweils in der einen oder anderen Stromrichtung mit einer elektrischen Spannungsquelle verbunden. Damit läßt sich der Anker aus der einen Endlage gegen die Kraft der Feder durch die von der Spule erzeugten magnetischen Kräfte in die andere Endlage schieben. Wird nun die Spule in entgegengesetzter Richtung elektrisch bestromt, so wirkt das von ihr erzeugte Magnetfeld dem Magnetfeld des Haftmagneten entgegen, so daß die Feder den Anker wieder in die eine Endlage zurückzustellen vermag.In an actuator available on the market, the electromagnet arrangement has a cylindrical coil in which an armature is displaceably arranged in the manner of a piston. By means of a spring, this armature is pushed into an end position in which the armature protrudes somewhat from the coil. This end position can thus be held in the currentless state of the coil by the force of the spring mentioned. In the other end position, the armature is held by a stationary holding magnet, against which the armature rests in this position. In order to adjust the armature, the coil is connected to an electrical voltage source in one or the other current direction. This allows the armature to be pushed from one end position against the force of the spring into the other end position by the magnetic forces generated by the coil. Now the coil is in the opposite direction electrically energized, the magnetic field generated by it counteracts the magnetic field of the holding magnet, so that the spring is able to return the armature to one end position.

Die Linearbewegung des Ankers kann gegebenenfalls durch entsprechende Getriebelemente, beispielsweise durch eine mit einem Zahnritzel zusammenwirkende und mit dem Anker verbundene Zahnstange, in eine Drehbewegung umgesetzt werden.The linear movement of the armature can, if appropriate, be converted into a rotary movement by corresponding gear elements, for example by a toothed rack which interacts with a pinion and is connected to the armature.

Dieser bekannte Stellantrieb ist trotz seiner prinzipiell einfachen Konstruktion herstellungsmäßig recht aufwendig.In spite of its basically simple construction, this known actuator is quite complex to manufacture.

Aus der AU-PS 1 155 866 ist weiterhin ein Stellantrieb bekannt, bei dem zwei magnetisch entgegengesetzte Pole einer Elektromagnetanordnung sowie mindestens ein Pol einer relativ zur Elektromagnetanordnung beweglichen Permanentmagnetanordnung miteinander zusammenwirken und je nach elektrischer Bestromungsrichtung der Magnetspule die eine oder andere Lage relativ zueinander einzunehmen suchen. Dabei sind die Pole der Magnetspule als Halteelement aus magnetisierbarem Material ausgebildet, wobei sich der Pol der Permanentmagnetanordnung in jeder der beiden selbsthaltenden Lagen maximal an eines der Halteelemente annähert.From AU-PS 1 155 866 an actuator is also known in which two magnetically opposite poles of an electromagnet arrangement and at least one pole of a permanent magnet arrangement movable relative to the electromagnet arrangement cooperate with one another and, depending on the direction of electrical current supply to the magnet coil, seek to assume one or the other position relative to one another . The poles of the magnetic coil are designed as a holding element made of magnetizable material, the pole of the permanent magnet arrangement in each of the two self-holding layers approaching at most one of the holding elements.

Aufgabe der Erfindung ist es, einen konstruktiv besonders einfachen Stellantrieb zu schaffen, wobei auch größere Stellkräfte erreichbar sein sollten.The object of the invention is to provide a structurally particularly simple actuator, and larger actuating forces should also be achievable.

Diese Aufgabe wird bei einem Stellantrieb der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß der Permanentmagnetanordnung innerhalb des von der Magnetspule erzeugbaren Magnetfeldes angeordnet und zwischen den beiden selbsthaltenden Lagen drehverstellbar ist und die magnetische Nord-Süd-Achse des Permanentmagneten quer zur Drehachse verläuft und in allen Stellungen des Permanentmagneten eine Richtungskomponente quer zur Richtung des Magnetfeldes der Magnetspule hat, und daß die Magnetspule axial von einem weichmagnetischen Stab durchsetzt ist und der Stab aus einem Stirnende der Magnetspule heraussteht bzw. dort an einen weichmagnetischen Fortsatz anschließt und am anderen Stirnende der Magnetspule mit einer aus weichmagnetischem Material bestehenden Gehäusewandung eines Gehäuses fest verbunden ist, wobei die Gehäusewandung mit einem Wandungsbereich bzw. Fortsatz über das eine Stirnende der Magnetspule hinausragt und der Permanentmagnet an diesem Stirnende der Magnetspule zwischen dem Stab bzw. dem stabseitigen Fortsatz und dem Wandungsbereich bzw. dem gehäuseseitigen Fortsatz angeordnet ist.This object is achieved according to the invention in an actuator of the type mentioned at the outset in that the permanent magnet arrangement is arranged within the magnetic field which can be generated by the magnetic coil and is rotatably adjustable between the two self-holding positions and the magnetic north-south axis of the permanent magnet extends transversely to the axis of rotation and in all positions of the permanent magnet has a directional component transverse to the direction of the magnetic field of the magnetic coil, and that the magnetic coil is axially penetrated by a soft magnetic rod and the rod protrudes from one end of the magnetic coil or connects there to a soft magnetic extension and at the other end of the Solenoid is firmly connected to a housing wall made of soft magnetic material of a housing, the housing wall with a wall area or extension protruding beyond the one end of the magnet coil and the permanent magnet at this front end of the magnet coil between the rod or the rod-side extension and the wall area or the housing-side extension is arranged.

Dadurch, daß die magnetische Nord-Süd-Achse des Permanentmagneten quer zur Drehachse verläuft und in allen Stellungen des Permanentmagneten eine Richtungskomponente quer zur Richtung des Magnetfeldes der Magnetspule hat, kann das von der Elektromagnetanordnung erzeugbare magnetische Feld mit beiden Polen des Permanentmagneten zur Erzeugung hoher Stellkräfte zusammenwirken, weil sich eine starke Bündelung des magnetischen Flusses zwischen den Polen der Elektromagnetanordnung und des Permanentmagneten ergibt.Characterized in that the magnetic north-south axis of the permanent magnet extends transversely to the axis of rotation and in all positions of the permanent magnet has a directional component transverse to the direction of the magnetic field of the magnet coil, the magnetic field that can be generated by the electromagnet arrangement with both poles of the permanent magnet can generate high actuating forces cooperate because there is a strong concentration of the magnetic flux between the poles of the electromagnet arrangement and the permanent magnet.

Weiterhin ist vorteilhaft, daß die einzustellenden Lagen in besonders einfacher Weise selbsthaltend ausgebildet sein können. In beiden einzustellenden Lagen nähern sich nämlich die Pole des Permanentmagneten jeweils relativ stark an die Pole der Elektromagnetanordnung an. Wenn nun die Elektromagnetanordnung weichmagnetische Polteile bzw. -stücke besitzt, so suchen die Pole des Permanentmagneten diese Teile bzw. Stücke auch dann magnetisch anzuziehen, wenn die Elektromagnetanordnung elektrisch stromlos gehalten wird.It is also advantageous that the layers to be set can be designed to be self-retaining in a particularly simple manner. In both positions to be set, the poles of the permanent magnet approach each other relatively strongly to the poles of the electromagnet arrangement. If the electromagnet arrangement now has soft-magnetic pole parts or pieces, the poles of the permanent magnet seek to magnetically attract these parts or pieces even when the electromagnet arrangement is kept electrically currentless.

Dabei sind die Haltekräfte um so größer, je mehr sich die Pole des Permanentmagneten an die genannten Polteile bzw. -stücke annähern können.The holding forces are greater the closer the poles of the permanent magnet can approach the pole parts or pieces mentioned.

In aller Regel wird jedoch - beispielsweise durch eine Kunststoffabdeckung der Pole des Permanentmagneten - eine unmittelbare Berührung zwischen den Polteilen bzw. -stücken der Elektromagnetanordnung und den Polen des Permanentmagneten verhindert, d.h. es verbleibt immer ein kleiner Luftspalt bzw. ein mit nichtmagnetisierbarem Material ausgefüllter Abstandsraum. Dadurch wird gewährleistet, daß die Elektromagnetanordnung den Permanentmagneten bereits bei Beaufschlagung mit relativ geringen elektrischen Strömen in der einen oder anderen Richtung aus der einen in die andere Endlage umzuschalten vermag.As a rule, however, direct contact between the pole parts or pieces of the electromagnet arrangement and the poles of the permanent magnet is prevented, for example by a plastic covering of the poles of the permanent magnet, i.e. there is always a small air gap or a space filled with non-magnetizable material. This ensures that the electromagnet arrangement is able to switch the permanent magnet from one end position to the other end position even when it is subjected to relatively low electrical currents in one direction or the other.

Im übrigen bilden bei dem erfindungsgemäßen Stellantrieb das aus dem einen Stirnende der Spule herausragende Ende des weichmagnetischen Stabes bzw. den Stab fortsetzenden Fortsatz einerseits und der Fortsatz der Gehäusewandung andererseits die Polteile bzw. -stücke der Elektromagnetanordnung. Hierdurch kann eine besonders kompakte Baueinheit erzielt werden.Moreover, in the actuator according to the invention the end of the soft magnetic rod protruding from one end of the coil or the extension continuing the rod on the one hand and the extension of the housing wall on the other hand form the pole parts or pieces of the electromagnet arrangement. This enables a particularly compact structural unit to be achieved.

Gemäß einer bevorzugten Ausführungsform kann das Gehäuse im wesentlichen geschlossen und zylinderförmig ausgebildet sein, wobei dann eine Stirnwand des Gehäuses die mit dem Stab fest verbundene Gehäusewandung bildet und die andere Stirnwand den über das eine Stirnende der Magnetspule hinausragenden Wandungsbereich bildet.According to a preferred embodiment, the housing can be essentially closed and cylindrical, in which case one end wall of the housing forms the housing wall fixedly connected to the rod and the other end wall forms the wall area projecting beyond the one end of the magnet coil.

Gegebenenfalls können an der Wandung des becherförmigen Gehäuses auch mehrere, beispielsweise zwei oder drei, die eine Stirnseite der Spule überragende Fortsätze der Gehäusewandung angeordnet sein, wobei diese Wandungsfortsätze in der Regel über den Umfang des Gehäuses gleichförmig verteilt sind. Auf diese Weise werden am Gehäuse mehrere gleichnamige Polteile bzw. -stücke gebildet. Damit besteht die Möglichkeit, mehrere separate Permanentmagneten jeweils zwischen einem Fortsatz der Wandung des Gehäuses und dem freien Ende des Stabes bzw. dem an den Stab anschließenden Fortsatz anzuordnen.If necessary, a plurality, for example two or three, of the housing wall protruding extensions of the housing wall can be arranged on the wall of the cup-shaped housing, these wall extensions in the Usually distributed uniformly over the circumference of the housing. In this way, several pole parts or pieces of the same name are formed on the housing. This makes it possible to arrange several separate permanent magnets each between an extension of the wall of the housing and the free end of the rod or the extension adjoining the rod.

Die Mehrfachanordnung der Permanentmagneten kann vorteilhaft sein, wenn der Stellantrieb für Handhabungsgeräte mit Greiferfunktion verwendet werden soll. Hierbei kann jeder Permanentmagnet mit je einem separaten Greiferelement antriebsgekoppelt sein.The multiple arrangement of the permanent magnets can be advantageous if the actuator is to be used for handling devices with a gripper function. Each permanent magnet can be drive-coupled with a separate gripper element.

Bei einer anderen vorteilhaften Ausführungsform der Erfindung ist vorgesehen, daß die Pole der Elektromagnetanordnung bzw. deren Polteile oder -stücke nur mit einem Pol bzw. mehreren gleichnamigen Polen der Permanentmagnetanordnung zusammenwirken.In another advantageous embodiment of the invention it is provided that the poles of the electromagnet arrangement or their pole parts or pieces cooperate only with one pole or several poles of the same name of the permanent magnet arrangement.

In diesem Falle kann bei einem Drehantrieb beispielsweise die Permanentmagnetanordnung als Exzenter ausgebildet sein, an dem der Pol bzw. die Pole der einen magnetischen Polarität exzentrisch zur Drehachse angeordnet sind, derart, daß sie mit den Polen oder Pulschuhen bzw. -stücken der Elektromagnetanordnung zusammenwirken können, wobei die Pole bzw. die Polschuhe oder -stücke der Elektromagnetanordnung wiederum aus weichmagnetischem Material bestehen, so daß sie mit der Permanentmagnetanordnung zur Sicherung der einzustellenden Lagen magnetisch zusammenwirken vermögen.In this case, with a rotary drive, for example, the permanent magnet arrangement can be designed as an eccentric, on which the pole or poles of one magnetic polarity are arranged eccentrically to the axis of rotation, in such a way that they can interact with the poles or pulse shoes or pieces of the electromagnet arrangement , The poles or the pole pieces or pieces of the electromagnet arrangement in turn consist of soft magnetic material so that they are able to interact magnetically with the permanent magnet arrangement to secure the positions to be set.

Im übrigen wird hinsichtlich vorteilhafter Merkmale der Erfindung auf die Ansprüche sowie die nachfolgende Erläuterung besonders bevorzugter Ausführungsformen verwiesen, die in der Zeichnung dargestellt sind.Otherwise, with regard to advantageous features of the invention, reference is made to the claims and the following explanation of particularly preferred embodiments, which are shown in the drawing.

Dabei zeigt

Fig. 1
eine geschnittene Seitenansicht einer ersten Ausführungsform des erfindungsgemäßen Stellantriebes,
Fig. 2
ein Schnittbild entsprechend der Schnittebene II-II in Fig. 1,
Fig. 3
eine geschnittene Seitenansicht einer zweiten Ausführungsform des erfindungsgemäßen Stellantriebes,
Fig. 4
ein Schnittbild entsprechend der Schnittebene IV-IV in Fig. 3,
Fig. 5
eine Achsansicht eines weiteren, als Drehantrieb ausgebildeten Stellantriebes,
Fig. 6
eine Seitenansicht entsprechend dem Pfeil VI in Fig. 5,
Fig. 7
eine der Fig. 5 entsprechende Ansicht einer Variante zur Ausführungsform der Fig. 5 und
It shows
Fig. 1
2 shows a sectional side view of a first embodiment of the actuator according to the invention,
Fig. 2
2 shows a sectional view corresponding to the sectional plane II-II in FIG. 1,
Fig. 3
2 shows a sectional side view of a second embodiment of the actuator according to the invention,
Fig. 4
3 shows a sectional view corresponding to the sectional plane IV-IV in FIG. 3,
Fig. 5
1 shows an axial view of a further actuator designed as a rotary drive,
Fig. 6
a side view corresponding to the arrow VI in Fig. 5,
Fig. 7
a view corresponding to FIG. 5 of a variant of the embodiment of FIGS. 5 and

Der in den Figuren 1 und 2 dargestellte Stellantrieb besitzt eine zylinderförmige Magnetspule 1, vorzugsweise mit relativ kurzer axialer Länge und vergleichsweise großem Durchmesser. Die Wicklungen der Magnetspule 1 sind auf einem Kunststoff-Tragteil 2 angeordnet, an dessen einer Stirnseite ein Sockel 3 angeformt ist, welcher einerseits zur Befestigung der Magnetspule 1 auf einer Montagefläche 4 und andererseits auch zur Halterung der in ihn eingebetteten elektrischen Anschlüsse 5 der Magnetspule 1 dient.The actuator shown in Figures 1 and 2 has a cylindrical magnetic coil 1, preferably with a relatively short axial length and a comparatively large diameter. The windings of the magnet coil 1 are arranged on a plastic support part 2, on one end of which a base 3 is formed, which on the one hand for fastening the magnet coil 1 on a mounting surface 4 and on the other hand for holding the electrical connections 5 of the magnet coil 1 embedded in it serves.

Die Magnetspule 1 wird axial durchsetzt von einem weichmagnetischen Stab 6, welcher am einen Stirnende aus der Magnetspule 1 mit einem Fortsatz 7 herausragt, der exzentrisch angeordnet ist und eine abgeplattete obere Seite besitzt. Mit seinem anderen Ende ist der Stab 6 fest, beispielsweise durch Nietung, mit dem Boden eines die Magnetspule 1 umschließenden becherförmigen Gehäuse 8 aus weichmagnetischem Material verbunden. Die Umfangswandung des Gehäuses 8 ragt auf der vom Gehäuse 8 nicht abgedeckten einen Stirnseite der Magnetspule 1 mit einem Fortsatz 9, welcher etwa gleiche Breite und Länge wie der Fortsatz 7 des Stabes 6 aufweist, über die in Fig. 1 linke Stirnseite der Magnetspule 1 hinaus. Bei Bestromung der Magnetspule 1 bilden die Fortsätze 7 und 9 magnetisch entgegengesetzte Polteile bzw. -stücke, zwischen denen sich ein vergleichsweise starkes Magnetfeld erstreckt, insbesondere, wenn der Abstand zwischen den Fortsätzen 7 und 9 gering ist.The magnet coil 1 is axially penetrated by a soft magnetic rod 6, which protrudes at one end from the magnet coil 1 with an extension 7, which is arranged eccentrically and has a flattened upper side. At its other end, the rod 6 is fixed, for example by riveting, to the bottom of a cup-shaped housing 8 which surrounds the magnet coil 1 and is made of soft magnetic material. The peripheral wall of the housing 8 protrudes on the one end face of the housing 8 which is not covered Magnetic coil 1 with an extension 9, which has approximately the same width and length as the extension 7 of the rod 6, beyond the left end face of the magnetic coil 1 in FIG. 1. When the magnet coil 1 is energized, the extensions 7 and 9 form magnetically opposite pole parts or pieces, between which a comparatively strong magnetic field extends, in particular if the distance between the extensions 7 and 9 is small.

Zwischen den Fortsätzen 7 und 8 ist ein doppelarmiger Hebel 10 aus nichtmagnetisierbarem Material, vorzugsweise Kunststoff, an einer zur Spulenachse parallelen, jedoch zur Spulenachse exzentrischen Achse 11 drehbar angeordnet, welche den Hebel 10 mit einem anzutreibenden Teil, beispielsweise einer Walze 12, antriebsmäßig verbindet.Between the extensions 7 and 8, a double-armed lever 10 made of non-magnetizable material, preferably plastic, is rotatably arranged on an axis 11 which is parallel to the coil axis but is eccentric to the coil axis and which connects the lever 10 to a part to be driven, for example a roller 12, in terms of drive.

Im Hebel 10 ist innerhalb des zwischen den Fortsätzen 7 und 9 erzeugbaren Magnetfeldes ein Permanentmagnet 13 eingebettet bzw. durch Klemmung festgehalten. Die magnetische Nord-Süd-Achse des Permanentmagneten 13 liegt etwa im dargestellten Beispiel in einer Mittellage des Hebels 10 quer zur Richtung des zwischen den Fortsätzen 7 und 9 erzeugbaren Magnetfeldes.A permanent magnet 13 is embedded or held in the lever 10 within the magnetic field that can be generated between the extensions 7 and 9 or held in place by clamping. The magnetic north-south axis of the permanent magnet 13 lies approximately in the example shown in a central position of the lever 10 transverse to the direction of the magnetic field that can be generated between the extensions 7 and 9.

Der dargestellte Stellantrieb funktioniert wie folgt:The actuator shown works as follows:

Wird die Magnetspule 1 in der einen oder anderen Richtung elektrisch bestromt, so wird zwischen den Fortsätzen 7 und 9 jeweils ein in der einen oder anderen Richtung polarisiertes Magnetfeld erzeugt.If the magnetic coil 1 is energized electrically in one direction or the other, a magnetic field polarized in one direction or the other is generated between the extensions 7 and 9.

Dieses Magnetfeld tritt in Wechselwirkung mit dem Permanentmagneten 13, wobei auf den Permanentmagneten 13 ein Drehmoment ausgeübt wird, welches den Permanentmagneten 13 so zu verstellen sucht, daß dessen magnetische Nord-Süd-Richtung antiparallel zur magnetischen Nord-Süd-Richtung des zwischen den Fortsätzen 7 und 9 erzeugten Magnetfeldes steht.This magnetic field interacts with the permanent magnet 13, a torque being exerted on the permanent magnet 13, which attempts to adjust the permanent magnet 13 such that its magnetic north-south direction is antiparallel to the magnetic north-south direction of the between the extensions 7 and 9 generated magnetic field.

Da die Arme des Hebels 10 anschlagartig mit dem Fortsatz 7 des Stabes 6 zusammenwirken - zu diesem Zweck besitzen die Hebelarme entsprechende Anschlagflächen 10' -, wird eine exakt antiparallele Ausrichtung der magnetischen Nord-Süd-Richtung des Permanentmagneten 13 relativ zur magnetischen Nord-Süd-Richtung des zwischen den Fortsätzen 7 und 9 erzeugten magnetischen Feldes verhindert, d.h. in beiden erreichbaren Endlagen des Hebels 10 bilden diese Nord-Süd-Richtungen in Stirnansicht der Magnetspule 1 einen Winkel von beispielsweise 45o.Since the arms of the lever 10 cooperate abutly with the extension 7 of the rod 6 - for this purpose the lever arms have corresponding abutment surfaces 10 '- an exactly antiparallel orientation of the magnetic north-south direction of the permanent magnet 13 relative to the magnetic north-south Prevents the direction of the magnetic field generated between the extensions 7 and 9, ie in both reachable end positions of the lever 10 these north-south directions form an angle of for example 45 o in front view of the magnet coil 1.

Damit ist gewährleistet, daß der Hebel 10 je nach elektrischer Polung der Magnetspule 1 in die eine oder andere Endlage gedrängt wird bzw. von jeweils einer Endlage in die andere Endlage umgeschaltet werden kann.This ensures that depending on the electrical polarity of the magnetic coil 1, the lever 10 is pushed into one or the other end position or can be switched from one end position to the other end position.

Auch bei stromloser Magnetspule 1 werden beide Endlagen selbsttätig gehalten, weil die Pole des Permanentmagneten 13 die jeweils benachbarten Fortsätze 7 und 9 magnetisch anzuziehen suchen und weil die jeweiligen Abstände in den Endlagen des Hebels 10 ein (relatives) Minimum erreichen.Even when the magnet coil 1 is de-energized, both end positions are automatically held because the poles of the permanent magnet 13 seek to magnetically attract the respectively adjacent extensions 7 and 9 and because the respective distances in the end positions of the lever 10 reach a (relative) minimum.

In der Regel soll der Hebel 10 bzw. ein stattdessen angeordnetes Tragteil für den Permanentmagneten 13 so ausgebildet sein, daß eine unmittelbare Berührung zwischen dem Permanentmagneten 13 und dem Fortsatz 7 und/oder 9 verhindert wird. Dadurch werden die in den Endlagen des Hebels 10 wirkenden magnetischen Haltekräfte, welche durch Zusammenwirken des Permanentmagneten 13 mit den Fortsätzen 7 und 9 erzeugt werden, verringert, mit der Folge, daß es genügt, die Magnetspule 1 mit relativ schwachen elektrischen Strömen zu beaufschlagen, um ein Umschalten des Hebels 10 zwischen den beiden Endlagen zu ermöglichen.As a rule, the lever 10 or a instead arranged support part for the permanent magnet 13 should be designed so that direct contact between the permanent magnet 13 and the extension 7 and / or 9 is prevented. As a result, the magnetic holding forces acting in the end positions of the lever 10, which are generated by the interaction of the permanent magnet 13 with the extensions 7 and 9, are reduced, with the result that it is sufficient to apply relatively weak electrical currents to the magnet coil 1 to enable switching of the lever 10 between the two end positions.

Um hohe Drehmomente erreichen zu können, sollen die Fortsätze 7 und 9 mit relativ großen Flächen einander zugewandt sein, so daß das Magnetfeld zwischen den Fortsätzen 7 und 9 den Permanentmagneten 13 "einhüllt". Gleichzeitig soll der Permanentmagnet quer zu seiner magnetischen Nord-Süd-Achse einen möglichst großen Querschnitt aufweisen, wobei der Durchmesser des Querschnittes gegebenenfalls größer sein kann als die Länge des Permanentmagneten in Richtung seiner magnetischen Achse.In order to be able to achieve high torques, the extensions 7 and 9 should face each other with relatively large areas, so that the magnetic field between the extensions 7 and 9 "envelops" the permanent magnet 13. At the same time, the permanent magnet should have the largest possible cross section transverse to its magnetic north-south axis, the diameter of the cross section possibly being greater than the length of the permanent magnet in the direction of its magnetic axis.

Besonders große Drehmomente lassen sich erzielen, wenn der Permanentmagnet 13 einen rechteckigen bzw. - vorzugsweise einen quadratischen Querschnitt aufweist und derart angeordnet ist, daß die Drehachse 11 parallel zu zwei Seiten des Rechteckes bzw. Quadrates ausgerichtet ist.Particularly large torques can be achieved if the permanent magnet 13 has a rectangular or - preferably a square cross section and is arranged such that the axis of rotation 11 is aligned parallel to two sides of the rectangle or square.

Abweichend von der dargestellten Ausführungsform kann der Hebel 10 bzw. ein entsprechendes Tragteil für den Permanentmagneten 13 auch eine andere Form haben. Beispielsweise können die Anschlagflächen 10' mit anderer V-Form relativ zueinander angeordnet sein, um zwischen den Endlagen einen Drehhub zu ermöglichen, welcher größer oder kleiner als 90° ist.Deviating from the illustrated embodiment, the lever 10 or a corresponding support part for the permanent magnet 13 can also have a different shape. For example, the abutment surfaces 10 'with a different V-shape can be arranged relative to one another in order to enable a rotational stroke between the end positions which is greater or less than 90 °.

Darüber hinaus kann der Hebel 10 auch mit von den Fortsätzen 7 und 9 getrennten Teilen anschlagartig zusammenwirken.In addition, the lever 10 can also cooperate abruptly with parts separated from the extensions 7 and 9.

Gegebenenfalls ist auch eine Mehrfachanordnung der Hebel 10 sowie der zugeordneten Permanentmagneten 13 möglich. In diesem Falle sind mehrere Fortsätze 9 der Umfangswandung des Gehäuses 8 angeordnet, wobei dann zwischen je einem Fortsatz 9 und dem Fortsatz 7 je ein Hebel 10 mit Permanentmagnet 13 in der in den Figuren 1 und 2 dargestellten Weise angeordnet werden kann. Bei Bestromung der Magnetspule 1 werden dann entsprechend viele Hebel 10 simultan verstellt.If necessary, a multiple arrangement of the levers 10 and the associated permanent magnets 13 is also possible. In this case, a plurality of extensions 9 of the peripheral wall of the housing 8 are arranged, in which case a lever 10 with a permanent magnet 13 can then be arranged between each extension 9 and the extension 7 in the manner shown in FIGS. 1 and 2. When the solenoid 1 is energized, a corresponding number of levers 10 are then adjusted simultaneously.

Bei der in den Figuren 3 und 4 dargestellten Ausführungsform ist die Magnetspule 1 in einem praktisch völlig geschlossenen Gehäuse 8 untergebracht, dessen zylindrische Umfangswand die Spule 1 praktisch ohne Abstand umschließt. Die eine Stirnwand 8' des Gehäuses 8 ist unmittelbar neben dem zugewandten Stirnende der Spule 1 angeordnet und mit einem die Spule 1 axial durchsetzenden Stab 6 fest verbunden, welcher ebenso wie das Gehäuse 8 aus weichmagnetischem Material besteht. Der Stab 6 erstreckt sich bis zu der in Fig. 3 oberen Stirnseite der Spule 1.In the embodiment shown in FIGS. 3 and 4, the magnet coil 1 is accommodated in a practically completely closed housing 8, the cylindrical circumferential wall of which encloses the coil 1 practically without a gap. One end wall 8 'of the housing 8 is arranged directly next to the facing end of the coil 1 and is fixedly connected to a rod 6 which passes axially through the coil 1 and which, like the housing 8, is made of soft magnetic material. The rod 6 extends up to the top end face of the coil 1 in FIG. 3.

Die andere Stirnwand 8'' des Gehäuses 8 ist mit Abstand von der zugewandten Stirnseite der Spule 8 sowie dem zugewandten Ende des Stabes 6 angeordnet. Gegebenenfalls kann an der Stirnwand 8', abweichend von der Darstellung in Fig. 3, auf der Gehäuseinnenseite ein zum Stab 6 hin vorspringender Fortsatz angeordnet sein, dessen Querschnitt dem Querschnitt des Stabes 6 entsprechen kann.The other end wall 8 ″ of the housing 8 is arranged at a distance from the facing end face of the coil 8 and the facing end of the rod 6. Optionally, on the inside of the housing, an extension projecting toward the rod 6 can be arranged on the end wall 8 ', deviating from the illustration in FIG. 3, the cross section of which can correspond to the cross section of the rod 6.

Bei Bestromung der Magnetspule 1 bilden die Stirnwand 8'' bzw. der daran angeordnete Fortsatz einerseits und das der Stirnwand 8'' zugewandte Ende des Stabes 6 andererseits die Pole bzw. Polstücke der Elektromagnetanordnung, d.h. zwischen dem Stab 6 und der Stirnwand 8'' bzw. dem daran angeordneten Fortsatz wird ein Magnetfeld erzeugt, dessen Stärke abhängig ist von der Stärke des die Magnetspule 1 durchsetzenden elektrischen Stromes.When the magnet coil 1 is energized, the end wall 8 ″ or the extension arranged thereon on the one hand and the end of the rod 6 facing the end wall 8 ″ on the other hand form the poles or pole pieces of the electromagnet arrangement, i.e. A magnetic field is generated between the rod 6 and the end wall 8 ″ or the extension arranged thereon, the strength of which is dependent on the strength of the electrical current passing through the magnet coil 1.

Im Abstandsraum zwischen dem Stab 6 und der Stirnwand 8'' ist mittels der Achse 11, die in Öffnungen der Umfangswand des Gehäuses 8 drehbar gelagert ist, ein mit dieser Achse 11 drehfest verbundener doppelarmiger Hebel 10 aus nichtmagnetisierbarem Material, beispielsweise Kunststoff, angeordnet. Innerhalb dieses Hebels 10 ist der Permanentmagnet 13 eingebettet, dessen magnetische Nord-Süd-Achse in Längsrichtung der Arme des Hebels 10 ausgerichtet ist.In the space between the rod 6 and the end wall 8 ″, an axis 11 with this axis 11 is located by means of the axis 11, which is rotatably mounted in openings in the peripheral wall of the housing 8 Rotationally connected double-armed lever 10 made of non-magnetizable material, for example plastic, is arranged. The permanent magnet 13, whose magnetic north-south axis is aligned in the longitudinal direction of the arms of the lever 10, is embedded within this lever 10.

Die Arme des Hebels 10 sind so bemessen, daß sie mit der Gehäusestirnwand 8'' bzw. mit dem Stab 6 anschlagartig zusammenwirken, derart, daß der Hebel 10 zwei Endlagen einzunehmen vermag, in denen die magnetische Nord-Süd-Richtung des Permanentmagneten 13 schräg zur Achse der Magnetspule 1 ausgerichtet ist.The arms of the lever 10 are dimensioned such that they interact with the housing end wall 8 '' or with the rod 6 in such a way that the lever 10 can assume two end positions in which the magnetic north-south direction of the permanent magnet 13 is inclined is aligned with the axis of the magnetic coil 1.

Je nach Richtung des die Magnetspule 1 beaufschlagenden elektrischen Stromes sucht dann der Permanentmagnet 13 und damit der Hebel 10 die eine oder andere Endlage einzunehmen. Auch bei stromlos geschalteter Spule werden die Endlagen aufgrund der magnetischen Anziehungskräfte selbsttätig gehalten, welche zwischen den Polen des Permanentmagneten 13 und der Gehäusestirnwand 8'' bzw. dem Stab 6 wirksam sind.Depending on the direction of the electric current acting on the magnetic coil 1, the permanent magnet 13 and thus the lever 10 then seek to assume one or the other end position. Even when the coil is switched off, the end positions are automatically held due to the magnetic attraction forces which are active between the poles of the permanent magnet 13 and the housing end wall 8 ″ or the rod 6.

Aufgrund des praktisch völlig geschlossenen Gehäuses 8 aus weichmagnetischem Material können sowohl von der Magnetspule 1 als auch vom Permanentmagneten 13 außerhalb des Gehäuses 8 praktisch keinerlei magnetische Streufelder erzeugt werden.Due to the practically completely closed housing 8 made of soft magnetic material, virtually no magnetic stray fields can be generated either by the magnet coil 1 or by the permanent magnet 13 outside the housing 8.

Auch bei der in den Fig. 3 und 4 dargestellten Ausführungsform soll in der Regel in den beiden Endlagen des Hebels 10 keine unmittelbare Berührung zwischen dem Permanentmagneten 13 und dem Stab 6 bzw. dem Gehäuseboden 8'' auftreten. Außerdem soll der Querschnitt des Permanentmagneten 13 quer zu dessen magnetischer Achse wiederum möglichst groß sein, um hohe Drehmomente erzeugen zu können.Even in the embodiment shown in FIGS. 3 and 4, there should generally be no direct contact between the permanent magnet 13 and the rod 6 or the housing base 8 ″ in the two end positions of the lever 10. In addition, the cross section of the permanent magnet 13 should again be as large as possible transversely to its magnetic axis in order to be able to generate high torques.

Der in den Fig. 5 und 6 dargestellte Stellantrieb besitzt eine zylinderförmige Magnetspule 1 mit einem Kern 20 aus weichmagnetischem Material. Die Magnetspule 1 läßt sich mit einer nicht dargestellten Gleichspannungsquelle in umpolbarer Weise verbinden, so daß die Spule 1 in zwei entgegengesetzten Richtungen mit Strom beaufschlagt werden kann. Je nach elektrischer Stromrichtung weist dann die magnetische Nord-Süd-Richtung des Kernes 20 in Fig. 1 von rechts nach links bzw. von links nach rechts.The actuator shown in FIGS. 5 and 6 has a cylindrical magnetic coil 1 with a core 20 made of soft magnetic material. The magnet coil 1 can be connected to a DC voltage source, not shown, in a manner which can be reversed, so that the coil 1 can be supplied with current in two opposite directions. Depending on the electrical current direction, the magnetic north-south direction of the core 20 in FIG. 1 then points from right to left or from left to right.

Jedes Ende des Kernes 20 ist jeweils mit einem Halteelement 23' bzw. 23'' verbunden, welches ebenso wie der Kern 20 aus weichmagnetischem Material besteht.Each end of the core 20 is connected to a holding element 23 'or 23' 'which, like the core 20, is made of soft magnetic material.

Im dargestellten Beispiel sind die Halteelemente 23' und 23'' als Blechteile ausgebildet, welche im wesentlichen aus jeweils einer am Stirnende der Magnetspule 1 angeordneten Platte mit zur Spulenachse radialer Plattenebene bestehen. Die Halteelemente 23' und 23'' besitzen an ihren in Fig. 5 unteren Rändern nach außen abgewinkelte Flansche zur Befestigung auf einer Montageebene. An den in Fig. 5 oberen Enden der Halteelemente 23' und 23'' sind in einer gemeinsamen Ebene gegeneinander gerichtete Lappen 24' und 24'' angeordnet, welche relativ zur Achse der Magnetspule 1 gemäß Fig. 6 zur Seite versetzt sein können.In the example shown, the holding elements 23 'and 23''are designed as sheet metal parts, which essentially consist of a plate arranged at the front end of the magnet coil 1 with a plate plane radial to the coil axis. The holding elements 23 'and 23''have at their lower edges in FIG. 5 angled flanges for fastening on an assembly level. At the upper ends of the holding elements 23 'and 23''in FIG. 5, tabs 24' and 24 '' which are directed towards one another are arranged in a common plane and which can be offset to the side relative to the axis of the magnetic coil 1 according to FIG. 6.

Zwischen den einander zugewandten freien Enden der Lappen 24' und 24'' verbleibt ein Abstandsraum für ein Exzenterteil 25, welches drehfest auf einer Welle 26 angeordnet ist, deren Achse etwa in der Ebene der Lappen 24' und 24'' quer zur Achse der Magnetspule 1 verläuft.Between the mutually facing free ends of the tabs 24 'and 24' 'there remains a space for an eccentric part 25 which is arranged in a rotationally fixed manner on a shaft 26, the axis of which is approximately in the plane of the tabs 24' and 24 '' transverse to the axis of the magnetic coil 1 runs.

In dem Beispiel der Fig. 5 und 6 besteht das Exzenterteil 25 aus nichtmagnetisierbarem Material, beispielsweise Kunststoff.In the example of FIGS. 5 and 6, the eccentric part 25 consists of non-magnetizable material, for example plastic.

Das Exzenterteil 25 besitzt einen kreissegmentförmigen Abschnitt 25', durch den der mögliche Drehhub des Exzenterteiles 25 im Zusammenwirken mit den Lappen 24' und 24'' begrenzt wird, d.h. in der einen Endlage des Exzenterteiles 25 wirkt der Lappen 24' als Anschlag, während der Exzenterteil 25 in seiner anderen Endlage am Lappen 24'' anschlägt.The eccentric part 25 has a segment 25 'in the form of a segment of a circle, by means of which the possible rotational stroke of the eccentric part 25 in cooperation with the tabs 24' and 24 '' is limited, i.e. In one end position of the eccentric part 25, the tab 24 'acts as a stop, while the eccentric part 25 strikes the tab 24' 'in its other end position.

Im Abschnitt 25' des Exzenterteiles 25 sind zwei stabförmige Permanentmagneten 27' und 27'' eingebettet, und zwar derart, daß an den radialen Endflächen des Abschnittes 25' des Exzenterteiles 25 jeweils Pole gleicher magnetischer Polarität - im Beispiel der Fig. 5 die magnetischen N-Pole - angeordnet sind.In section 25 'of the eccentric part 25, two rod-shaped permanent magnets 27' and 27 '' are embedded, in such a way that on the radial end faces of the section 25 'of the eccentric part 25 poles of the same magnetic polarity - in the example of FIG. 5, the magnetic N -Pole - are arranged.

Die Pole der entgegengesetzten magnetischen Polarität der Permanentmagnete 27' und 27'' können, wie es in Fig. 5 dargestellt ist, etwa in der radialen Mittelebene des Abschnittes 25' des Exzenterteiles 25 aneinanderstoßen.The poles of the opposite magnetic polarity of the permanent magnets 27 'and 27' ', as shown in FIG. 5, can abut one another approximately in the radial central plane of the section 25' of the eccentric part 25.

Mittels der Welle 26 ist das Exzenterteil 25 drehfest mit einem anzutreibenden Organ, im Beispiel der Fig. 5 und 6 mit einer Segmentwalze 12 einer Anzeigetafel, verbunden, wobei axial zwischen der Segmentwalze 12 und dem Exzenterteil 25 ein für beide Teile gemeinsames Wellenlager 29 angeordnet ist.By means of the shaft 26, the eccentric part 25 is connected in a rotationally fixed manner to an organ to be driven, in the example of FIGS. 5 and 6 to a segment roller 12 of a display panel, a shaft bearing 29 common to both parts being arranged axially between the segment roller 12 and the eccentric part 25 .

Der in den Fig. 5 und 6 dargestellte Stellantrieb funktioniert wie folgt:The actuator shown in Figures 5 and 6 works as follows:

Die möglichen Endlagen des Exzenterteiles 25 werden bei stromloser Magnetspule 1 durch Zusammenwirken der Permanentmagnete 27' bzw. 27'' mit dem Lappen 24' bzw. 24'' gesichert. Die in Fig. 5 gezeigte Endlage wird durch den Permanentmagneten 27' gehalten, der mit seinem einen Pol (N-Pol) dem Lappen 24' zugewandt ist und denselben anzuziehen sucht. Da der Abstand zwischen dem Lappen 24' und dem zugewandten Pol des Permanentmagneten 27' wesentlich geringer ist als der entsprechende Abstand zwischen dem Lappen 24'' und dem zugewandten Pol des Permanentmagneten 27", sind die zwischen dem Permanentmagneten 27' und dem Lappen 24' wirkenden anziehenden magnetischen Kräfte deutlich größer als diejenigen zwischen dem Permanentmagneten 27'' und dem Lappen 24".The possible end positions of the eccentric part 25 are secured when the magnet coil 1 is de-energized by the permanent magnets 27 ′ or 27 ″ interacting with the tabs 24 ′ or 24 ″. The end position shown in FIG. 5 is held by the permanent magnet 27 ', which with its one pole (N pole) faces the tab 24' and tries to attract it. Since the distance between the tab 24 'and the facing pole of the permanent magnet 27' is significantly smaller than the corresponding distance between the tab 24 '' and the facing pole of the permanent magnet 27 ", those between the permanent magnet 27 'and the tab 24' acting magnetic forces significantly larger than those between the permanent magnet 27 "and the tab 24".

Entsprechend umgekehrt sind die Verhältnisse in der anderen Endlage des Exzenterteiles 25.The conditions in the other end position of the eccentric part 25 are correspondingly reversed.

Wird nun die Magnetspule 1 bestromt, so bilden die Lappen 24' und 24'' Magnetpole entgegengesetzter magnetischer Polarität, da die Halteelemente 23' und 23'' aus magnetisierbarem Material bestehen und in magnetisch leitender Verbindung mit dem Kern 20 der Magnetspule 1 stehen.If the magnet coil 1 is now energized, the tabs 24 ′ and 24 ″ form magnetic poles of opposite magnetic polarity, since the holding elements 23 ′ and 23 ″ consist of magnetizable material and are in a magnetically conductive connection with the core 20 of the magnet coil 1.

Wenn nun die Richtung der elektrischen Bestromung der Magnetspule 1 so gewählt wird, daß der Lappen 24' einen magnetischen Südpol bildet, so sucht dieser den zugewandten magnetischen Nordpol des Permanentmagneten 27' anzuziehen, während der Lappen 24", welcher bei der angegebenen Bestromungsrichtung der Magnetspule 1 einen magnetischen Nordpol bildet, den zugewandten Nordpol des Permanentmagneten 27'' abstößt. Damit wird ein auf das Exzenterteil 25 einwirkendes Drehmoment in Richtung der in Fig. 5 dargestellten Endlage bewirkt.If the direction of the electrical current supply to the magnet coil 1 is selected so that the tab 24 'forms a magnetic south pole, then this seeks to attract the magnetic north pole facing the permanent magnet 27', while the tab 24 ", which in the specified direction of current supply to the magnet coil 1 a magnetic north pole forms, the facing north pole of the permanent magnet 27 '' repels. This causes a torque acting on the eccentric part 25 in the direction of the end position shown in FIG. 5.

Entsprechend Umgekehrtes gilt in der entgegengesetzten Bestromungsrichtung der Magnetspule 1.The reverse applies accordingly in the opposite direction of current supply to the magnet coil 1.

Somit können die beiden Endlagen des Exzenterteiles 25 durch entsprechende elektrische Polung der elektrischen Verbindungen der Magnetspule 1 mit der Gleichspannungsquelle eingestellt werden.Thus, the two end positions of the eccentric part 25 can be set by appropriate electrical polarity of the electrical connections of the magnetic coil 1 with the DC voltage source.

Sobald die Endlagen erreicht sind, kann die Magnetspule 1 stromlos geschaltet werden.As soon as the end positions are reached, the solenoid 1 can be switched off.

Abweichend von der in den Fig. 5 und 6 dargestellten Ausführungsform können die Permanentmagnete 27' und 27'' auch so im Abschnitt 25' des Exzenterteiles 25 eingebettet sein, daß sie in den Endlagen des Exzenterteiles 25 jeweils auf dem Lappen 24' bzw. 24'' aufliegen. Dadurch können die die Endlagen des Exzenterteiles 25 sichernden Haltekräfte vergrößert werden.5 and 6, the permanent magnets 27 'and 27' 'can also be embedded in section 25' of the eccentric part 25 in such a way that they are in the end positions of the eccentric part 25 on the tabs 24 'and 24, respectively '' lie on. As a result, the holding forces securing the end positions of the eccentric part 25 can be increased.

Die in Fig. 5 dargestellte Ausführungsform, bei der zwischen den Lappen 24' und 24'' sowie den Permanentmagneten 27' und 27'' in den Endlagen des Exzenterteiles 25 jeweils ein geringer Abstand verbleibt, verhindert, daß die Permanentmagnete 27' und 27'' "hart" auf die Lappen 24' bzw. 24'' aufschlagen können, wodurch die permanente Magnetisierung der Permanentmagnete 27' und 27'' tendenziell geschwächt werden kann.The embodiment shown in FIG. 5, in which there is a small distance between the tabs 24 'and 24''and the permanent magnets 27' and 27 '' in the end positions of the eccentric part 25, prevents the permanent magnets 27 'and 27' from can hit "hard" on the tabs 24 'or 24 ", whereby the permanent magnetization of the permanent magnets 27' and 27" can tend to be weakened.

Die in Fig. 7 dargestellte Ausführungsform unterscheidet sich von der Ausführungsform der Fig. 5 und 6 lediglich dadurch, daß das Exzenterteil 25 als Permanentmagnet ausgebildet ist, wobei der Abschnitt 25' den Pol der einen Polarität (N-Pol) und der der Welle 26 benachbarte Bereich den Pol der entgegengesetzten magnetischen Polarität bildet.The embodiment shown in FIG. 7 differs from the embodiment of FIGS. 5 and 6 only in that the eccentric part 25 is designed as a permanent magnet, the section 25 ′ being the pole of one polarity (N pole) and that of the shaft 26 adjacent area forms the pole of opposite magnetic polarity.

Die Funktion dieser Ausführungsform entspricht derjenigen der Fig. 5 und 6.The function of this embodiment corresponds to that of FIGS. 5 and 6.

Bei den Ausführungsformen der Fig. 5 bis 7 wirken die Halteelemente 23' und 23" bzw. an ihnen angeformte Lappen 24' und 24" mit dem Exzenterteil 25 bzw. dem Schieber 30 nach Art von Anschlägen zusammen.In the embodiments of FIGS. 5 to 7, the holding elements 23 'and 23 "or tabs 24' and 24" formed on them cooperate with the eccentric part 25 or the slide 30 in the manner of stops.

Grundsätzlich ist es jedoch auch möglich, Anschläge anzuordnen, die mit dem jeweils vom Stellantrieb angetriebenen Organ, z.B. mit der Segmentwalze 12, zusammenwirken. In diesem Falle werden die Halteelemente 23' und 23'' bzw. die Lappen 24' und 24'' nicht als mechanische Anschläge benötigt.In principle, however, it is also possible to arrange stops which are connected to the organ driven by the actuator, e.g. interact with the segment roller 12. In this case, the holding elements 23 'and 23' 'or the tabs 24' and 24 '' are not required as mechanical stops.

Im übrigen ist es grundsätzlich auch möglich, auf mechanische Anschläge völlig zu verzichten und allein magnetische Kräfte zwischen den Halteelementen 23' und 23'' bzw. damit verbundenen Teilen und relativ dazu beweglichen Permanentmagneten, die als zur Magnetspule 1 bewegliches Teil oder als Elemente desselben angeordnet sind, zur anschlagartigen Sicherung der einzustellenden Lagen auszunutzen.For the rest, it is also possible in principle to completely dispense with mechanical stops and only magnetic forces between the holding elements 23 'and 23' 'or parts connected thereto and permanent magnets movable relative thereto, which are arranged as a part movable as a magnet coil 1 or as elements thereof are to be used for the stop-like securing of the positions to be set.

Um gegebenenfalls ein Signal erzeugen zu können, welches anzeigt, daß die eine oder andere Lage des Exzenters 25 bzw. des Schiebers 30 erreicht ist, können Hallgeneratoren oder sonstige Sensoren angeordnet sein, die in diesen Lagen auf das Magnetfeld der Permanentmagneten ansprechen.In order to be able to generate a signal which indicates that one or the other position of the eccentric 25 or the slide 30 has been reached, Hall generators or other sensors can be arranged which respond to the magnetic field of the permanent magnets in these positions.

Bei der Erfindung ist besonders vorteilhaft, daß die einzustellenden Lagen auch bei stromlosen Elektromagneten mit großer Kraft eingehalten werden können, wobei gegebenenfalls durch Bestromung des Elektromagneten eine stark erhöhte Haltekraft möglich ist, und zwar bei beiden Lagen.In the case of the invention, it is particularly advantageous that the positions to be set can be maintained with great force even when the electromagnet is de-energized, a greatly increased holding force possibly being possible by energizing the electromagnet, specifically in both positions.

Zur Umschaltung zwischen den beiden Lagen genügt ein kurzer Stromstoß, d.h. der Energieaufwand ist gering.A short current surge is sufficient to switch between the two positions, i.e. the energy consumption is low.

Claims (10)

  1. Positioning drive for the setting of two self-holding positions which can be selected by the flow of electrical current in the one or other current flow direction in an electromagnet arrangement of which the polarity can be changed and which has a cylindrical magnet coil (1), wherein two magnetically opposite poles (7, 9, 24', 24") of the magnet coil (1) and also at least one pole of a permanent magnet arrangement (13, 25, 27', 27") movable relative to the magnet coil (1) cooperate together and attempt to adopt the one or other position relative to one another, depending on the direction of electrical current flow in the magnet coil (1), and wherein the poles (7, 9, 24', 24") of the magnet coil (2) are formed as holding elements of magnetisable material, or are provided with holding elements, and the said pole of the permanent magnet arrangement (13, 25, 27', 27") approaches one of the holding elements in each of the two self-holding positions by a maximum amount, characterised in that the permanent magnet arrangement (13) is arranged within the magnetic field, which can be generated by the magnet coil (1) and is rotationally adjustable between the two self-holding positions; in that the magnetic north-south axis of the permanent magnet (13) extends transversely to the axis of rotation (11) and has in all positions of the permanent magnet (13) a directional component transverse to the direction of the magnetic field of the magnetic coil (1); and in that the magnetic coil (1) is axially permeated by a soft magnetic bar (6), and the bar (6) projects out of one end of the magnetic coil (1), or is joined there to a soft magnetic projection (7), and is fixedly connected at the other end face of the magnetic coil (1) to a housing wall of the housing (8) consisting of soft magnetic material, wherein the housing wall has a wall region or projection (9) which projects beyond the end face of the magnetic coil (1) and the permanent magnet (13) is arranged at this end face of the magnetic coil (1) between the bar (6), or the bar-like projection (7), and the wall region, or the housing side projection (9).
  2. Positioning drive in accordance with claim 1, characterised in that the housing (8) is substantially closed and of cylinder like shape; and in that one end wall (8') of the housing forms the housing wall which is fixedly connected to the bar (6) and the other end wall (8") forms the wall region which projects beyond the one end face of the magnetic coil (1).
  3. Positioning drive in accordance with claim 1 or claim 2, characterised in that the magnetic coil (1) has a relatively short axial length and a comparatively large diameter.
  4. Positioning drive in accordance with one of the claims 1 to 3, characterised in that the permanent magnet (13) is mounted or embedded in plastic parts (lever 10) which cooperates in abutment-like manner in both positions with pole parts or pole pieces (7, 9; 6, 8") of the electromagnet arrangement (1).
  5. Positioning drive in accordance with claim 2, characterised in that the peripheral wall of the housing (8) surrounds the magnetic coil (1) without or almost without clearance and the one end wall (8') of the housing (8) is arranged directly alongside the neighbouring end face of the magnetic coil (1).
  6. Positioning drive in accordance with claim 1, characterised in that the permanent magnet arrangement (25; 27', 27") is formed as an eccentric arrangement, or as a part of the latter, with two permanent magnets (27', 27") being embedded or arranged in an eccentric section (25') of the eccentric arrangement, with the poles of the permanent magnets of the one magnetic polarity being respectively mounted on radial end regions of the section (25') which face away from each other in the peripheral direction of the eccentric arrangement.
  7. Positioning drive in accordance with claim 1, characterised in that the permanent magnet arrangement (25) is formed as an eccentric arrangement, or as a part of the latter, with the eccentric arrangement being designed as a permanent magnet, and an eccentric region (25') forming the pole of the one magnetic polarity.
  8. Positioning drive in accordance with one of the preceding claims, characterised in that the holding elements cooperate with the permanent magnet arrangement (13; 25; 27', 27") as mechanical abutments.
  9. Positioning drive in accordance with one of the preceding claims, characterised in that at least one pole of the permanent magnet arrangement (13; 25; 27', 27") approaches in its two positions in each case the soft magnetic pole parts or pieces (6, 8"; 7, 9; 23', 23"; 24', 24") of the electromagnet arrangement (1) by a maximum amount, i.e. has a maximum spacing from these parts in a central position.
  10. Positioning drive in accordance with claim 9, characterised in that a direct contact between the pole parts or pole pieces (6, 8"; 7, 9; 23', 23"; 24', 24") of the electromagnet arrangement (1) and of the permanent magnet arrangement (13; 25; 27', 27") is prevented - for example by means of abutments (lever 10).
EP91110334A 1990-06-26 1991-06-22 Actuator for adjusting two self-holding positions Expired - Lifetime EP0463590B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4020275 1990-06-26
DE19904020275 DE4020275C2 (en) 1990-06-26 1990-06-26 Actuator for setting two self-holding positions
DE4027366A DE4027366A1 (en) 1990-06-26 1990-08-30 ACTUATOR FOR ADJUSTING TWO LAYERS
DE4027366 1990-08-30

Publications (3)

Publication Number Publication Date
EP0463590A2 EP0463590A2 (en) 1992-01-02
EP0463590A3 EP0463590A3 (en) 1993-02-24
EP0463590B1 true EP0463590B1 (en) 1997-08-20

Family

ID=25894459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110334A Expired - Lifetime EP0463590B1 (en) 1990-06-26 1991-06-22 Actuator for adjusting two self-holding positions

Country Status (4)

Country Link
EP (1) EP0463590B1 (en)
AT (1) ATE157195T1 (en)
DE (2) DE4027366A1 (en)
ES (1) ES2106745T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717947B1 (en) * 1994-03-25 1996-05-31 Sagem Rotary electromagnetic actuator with limited angular travel.
CN112967861B (en) * 2021-03-02 2022-09-16 东莞市粤海磁电科技有限公司 Automatic multi-pole magnetizing equipment for magnet magnetizing

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632072A (en) * 1950-03-20 1953-03-17 Floyd L Zellner Low voltage switch
DE1292244B (en) * 1963-01-31 1969-04-10 Siemens Ag Electrical switchgear
AU1155866A (en) * 1967-06-22 1969-01-09 Telephone & Electrical Industries Pty. Ltd Electromechanical bi-stable motive unit
CA1132646A (en) * 1979-06-05 1982-09-28 Christian C. Petersen Linear motor
DE3520773C1 (en) * 1985-05-29 1989-07-20 SDS-Relais AG, 8024 Deisenhofen Electromagnetic relay
DE3640188C2 (en) * 1986-11-25 1995-03-23 Deutsche Aerospace Actuator
DE3843646C2 (en) * 1988-12-23 1994-05-26 Spinner Georg Electromagnetic switch drive

Also Published As

Publication number Publication date
DE4027366A1 (en) 1992-03-19
EP0463590A2 (en) 1992-01-02
ATE157195T1 (en) 1997-09-15
EP0463590A3 (en) 1993-02-24
ES2106745T3 (en) 1997-11-16
DE59108827D1 (en) 1997-09-25

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