EP2401479B1 - Electromagnetic actuating device - Google Patents

Electromagnetic actuating device Download PDF

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Publication number
EP2401479B1
EP2401479B1 EP10705325.8A EP10705325A EP2401479B1 EP 2401479 B1 EP2401479 B1 EP 2401479B1 EP 10705325 A EP10705325 A EP 10705325A EP 2401479 B1 EP2401479 B1 EP 2401479B1
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EP
European Patent Office
Prior art keywords
pins
actuator
actuating device
pin
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.)
Not-in-force
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EP10705325.8A
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German (de)
French (fr)
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EP2401479A1 (en
Inventor
Andreas Nendel
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of EP2401479A1 publication Critical patent/EP2401479A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
    • 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
    • H01F7/1638—Armatures not entering the winding
    • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/031—Electromagnets

Definitions

  • the invention relates to an electromagnetic actuator having a housing and two actuator pins, which are mounted independently movable between a retracted into the housing operating position and a retracted from the housing working position in the housing and force acted upon by spring means in the extension, and locking pins, the actuator pins by means Hold detents in the rest position and in the direction of movement of the actuator pins relative to these are displaced.
  • the locking pins of other spring means in the extension direction are subjected to force and electromagnetically kraftbeaufschlagt relocated to release the detents in the retraction direction.
  • Such a control device is particularly suitable for adjusting hubvariabler valve drives of internal combustion engines, whose basic operation, for example, from DE 10 2004 021 376 A1 evident.
  • the stroke variability of this valve train is based on a cam piece with two cams arranged directly adjacent thereto, the different opening characteristics of which are selectively transferred to a gas exchange valve by means of a conventionally rigid cam follower.
  • the cam piece is non-rotatable, however arranged longitudinally displaceable on a support shaft and has two spiral and oppositely extending sliding grooves, in which the end portions of the actuator pins of two actuating devices (with only one Aktuatorux) are alternately coupled.
  • the electromagnetic force is applied to the locking pins by means of magnetic anchors attached thereto, each of which forms a Elektrohubmagneten associated with magnetic coils.
  • two such Elektrohubmagneten are required at a correspondingly high cost of manufacture and installation of the actuator.
  • the present invention is therefore the object of an adjusting device of the type mentioned in such a way that the adjusting device not only takes up the smallest possible space and has a small distance of the actuator pins, but also as little as possible manufacturable and mountable.
  • the adjusting device has a locking pins together associated electromagnet with reversible direction of the magnetic field and the actuator pins facing away from end portions of the locking pins are provided with two pole magnetized permanent magnets, which are oppositely poled in the direction of travel to each other.
  • the permanent magnets are intended to extend at a distance from the core of the electromagnet to the core area when the end sections of the locking pins facing away from the actuator pins bear against one another.
  • the core region forms a planar contact surface for the locking pins, wherein the end portions of the locking pins facing away from the actuator pins are raised in relation to the permanent magnets.
  • the one or more locking bodies are preferably formed as balls, as they are removable as an extremely cost-effective mass product of a rolling element. In this case, three balls and three evenly distributed over the circumference of the actuator pin transverse bores may be provided.
  • This arrangement is advantageous over only one detent body insofar as greater holding forces can be generated either with identical dimensioning of the detent body or with smaller dimensions of the detent body - corresponding to a further reduced space requirement of the detent - the possibly already sufficient holding force of only one detent body can be generated.
  • the arrangement of circumferentially distributed by 120 ° balls leads to a mechanically favorable, centered support of the locking pin in the longitudinal bore of the actuator pin. Nevertheless, of course, arrangements with only one, two, four or more balls are possible.
  • the balls may be self-locking clamped between the support surfaces, wherein the support surfaces have a constant or a decreasing in the retraction distance from each other.
  • the second support surface may be parallel to the direction of travel of the actuator pin and be part of a production-wise continuous cylindrical guide for the Aktuatorux.
  • both the forces of the spring means and the friction conditions on the ball-support surface contacts are taken into account, so that the required for proper function of the detent region of self-locking is not left at these contacts.
  • the first support surface on the locking pin in the extension direction radially tapers and that the support surfaces are parallel to each other.
  • the support surfaces are formed Vietnameseflgelstumpfförmig. This embodiment allows a particularly low-wear sliding or rolling contact between the balls and the support surfaces when the actuator pin leaves the rest position and reached again.
  • the figure discloses an adjusting device 1, which is used to control a lift-variable valve drive described above with sliding cam pieces (see DE 196 11 641 C1 ).
  • the adjusting device 1 is an assembly which can be mounted in the cylinder head of the internal combustion engine and has a housing 2 and two hollow cylindrical actuator pins 3 and 4.
  • the actuator pins 3, 4 designed as identical parts are mounted in longitudinal guides 5 of the housing 2 and can be mounted moved independently between a retracted into the housing 2 rest position (as shown) and an extended from the housing 2 working position back and forth. As explained above, in the working position (not shown), the actuator pins 3, 4 are engaged with an associated slide groove to displace the cam piece.
  • the spring pins - here helical compression springs 6 - in the extension direction kraftbeaufschlagten actuator pins 3, 4 are held by detents in the rest position. A release of the detents is effected by controllable locking pins 7 and 8, which are also formed as identical parts and relative to the actuator pins 3, 4 are displaced in the direction of travel.
  • the mutually identical detents are each by a running in the actuator pin 3, 4 longitudinal bore 9 and these intersecting transverse bores 10, a formed on the locking pin 7, 8 first support surface 11 and formed in a housing 2 second support surface 12 and three locking bodies in the form of balls 13 are formed.
  • the spherically arranged in the evenly on the circumference of the actuator pin 3, 4 transverse bores 10 balls 13 are clamped in the rest position of the actuator pin 3, 4 between the support surfaces 11 and 12.
  • the extending in the longitudinal bore 9 end portion 14 of the locking pin 7, 8 tapers conically in the extension direction of the Aktuatorlixs 3, 4, so that the first support surface 11 forms the outer circumferential surface of a circular truncated cone.
  • the second support surface 12 in the housing 2 extends at a constant distance thereto and thus forms the inner circumferential surface of a circular truncated cone.
  • the locking pins 7, 8 are each acted upon by a further spring means - here a helical compression spring 15 - also in the extension direction.
  • the angle of inclination of the support surfaces 11, 12 relative to the direction of movement of the actuator pin 3, 4 is chosen taking into account the force acting on the locking pin 7, 8 and the actuator pin 3, 4 spring forces and the friction conditions on the ball-support surface contacts that the balls 13th self-locking between the support surfaces 11, 12 are clamped and so fix the actuator pin 3, 4 securely in the rest position.
  • the inclination angle is presently about 5 °.
  • the concentric helical compression springs 6, 15 are based, on the one hand, on bushings 16 pressed into the housing 2 and, on the other hand, on annular end faces 17 and 18 of the actuator pins 3, 4 or the locking pins 7, 8.
  • the locking pins 7, 8 are electromagnetically kraftbeaufschlagt for releasing the detents in the retraction of the actuator pins 3, 4 and are provided for this purpose at their the actuator pins 3, 4 opposite end portions 19 with permanent magnets 20 and 21 attached thereto.
  • these two-pole magnets are axially magnetized, aligned in the direction of travel of the actuator pins 3, 4 with respect to their north and south poles designated N and S, and exposed to the magnetic field of a single electromagnet 22.
  • the solenoid 22 includes as essential components a magnetic coil 23, a stationary core portion 24 and a 2-pin connector 25 as a DC terminal for the magnetic coil 23.
  • the coaxially extending in the magnetic coil 23 core portion 24 has on the part of the permanent magnets 20, 21 a shoulder, the a flat contact surface 26 for the locking pins 7, 8 forms.
  • a strongly adhering contact of the permanent magnets 20, 21 on the abutment surface 26 is avoided in that the end portions 19 of the locking pins 7, 8 are raised with respect to the permanent magnets 20, 21 and they always have a corresponding minimum distance to the abutment surface 26.
  • the operation of the adjusting device 1 is as follows: applied to the electromagnet 22 voltage with a first polarity (+/-), the resulting magnetic field attracts a permanent magnet 20 or 21 and abuts the other permanent magnet 21 or 20 due to its reverse polarity from. While the repelled permanent magnet 21 or 20, the associated locking pin 8 or 7 and consequently also the associated actuator pin 4 or 3 remain at rest due to the associated non-dissolved detent, with the one permanent magnet 20 or 21 attracted locking pin 7 or 8 to the contact surface 26 shifted in the retraction direction. In this case, the associated detent detaches by the clamping action of the balls 13 relative to the support surfaces 11, 12 is released.
  • the actuator pin 3 or 4 is driven by the force of the helical compression spring 6 in its working position.
  • the solenoid 22 is then de-energized, so that the attracted locking pin 7 or 8 returns by the force of the helical compression spring 15 to its original position.
  • the engaged actuator pin 3 or 4 is pushed by the radially rising outlet region of the sliding groove back into its rest position and locked there again. This is done by the balls 13 the inclined course of the first support surface 11 on Follow locking pin 7 or 8, move radially outward in the transverse bores 10 and are clamped under self-locking between the support surfaces 11, 12.
  • the actuation of the other actuator pin 4 or 3 is initiated by applying voltage to the electromagnet 22 with the second polarity (- / +) reversed to the first polarity (+/-) becomes.
  • the reverse effective direction of the magnetic field now arising repels the one permanent magnet 20 or 21 and attracts the other permanent magnet 21 or 20 at.
  • the further control curve of the other actuator pin 4 or 3 takes place in an identical manner as explained above.

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft eine elektromagnetische Stellvorrichtung mit einem Gehäuse und zwei Aktuatorstiften, die zwischen einer in das Gehäuse eingefahrenen Ruheposition und einer aus dem Gehäuse ausgefahrenen Arbeitsposition unabhängig voneinander verfahrbar im Gehäuse gelagert und von Federmitteln in die Ausfahrrichtung kraftbeaufschlagt sind, sowie Sperrstiften, die die Aktuatorstifte mittels Rastierungen in der Ruheposition halten und in Verfahrrichtung der Aktuatorstifte relativ zu diesen verlagerbar sind. Dabei sind die Sperrstifte von weiteren Federmitteln in die Ausfahrrichtung kraftbeaufschlagt und werden zum Lösen der Rastierungen elektromagnetisch kraftbeaufschlagt in die Einfahrrichtung verlagert.The invention relates to an electromagnetic actuator having a housing and two actuator pins, which are mounted independently movable between a retracted into the housing operating position and a retracted from the housing working position in the housing and force acted upon by spring means in the extension, and locking pins, the actuator pins by means Hold detents in the rest position and in the direction of movement of the actuator pins relative to these are displaced. The locking pins of other spring means in the extension direction are subjected to force and electromagnetically kraftbeaufschlagt relocated to release the detents in the retraction direction.

Hintergrund der ErfindungBackground of the invention

Eine derartige Stellvorrichtung eignet sich in besonderem Maße zur Verstellung hubvariabler Ventiltriebe von Brennkraftmaschinen, deren prinzipielle Funktionsweise beispielsweise aus der DE 10 2004 021 376 A1 hervorgeht. Die Hubvariabilität dieses Ventiltriebs basiert auf einem Nockenstück mit zwei darauf unmittelbar benachbart angeordneten Nocken, deren unterschiedliche Öffnungsverläufe mittels eines konventionell starr ausgebildeten Nockenfolgers selektiv auf ein Gaswechselventil übertragen werden. Zur betriebspunktabhängigen Einstellung dieser Öffnungsverläufe ist das Nockenstück drehfest, jedoch längsverschieblich auf einer Trägerwelle angeordnet und weist zwei spiralförmig und gegensinnig verlaufende Verschiebenuten auf, in welche die Endabschnitte der Aktuatorstifte zweier Stellvorrichtungen (mit lediglich einem Aktuatorstift) wechselweise eingekoppelt werden. Während der axiale Verlauf der sich jeweils mit dem zugehörigen Aktuatorstift in Eingriff befindlichen Verschiebenut dazu führt, dass sich das Nockenstück selbststeuernd und nockenwellenwinkeltreu von der einen in die andere Nockenposition verschiebt, ist der radiale Verlauf jeder Verschiebenut so gestaltet, dass diese gegen Ende des Verschiebevorgangs zunehmend flacher wird und den momentan in Eingriff befindlichen Aktuatorstift aus seiner Arbeitsposition zurück in die Ruheposition verlagert.Such a control device is particularly suitable for adjusting hubvariabler valve drives of internal combustion engines, whose basic operation, for example, from DE 10 2004 021 376 A1 evident. The stroke variability of this valve train is based on a cam piece with two cams arranged directly adjacent thereto, the different opening characteristics of which are selectively transferred to a gas exchange valve by means of a conventionally rigid cam follower. For operating point-dependent adjustment of these opening courses, the cam piece is non-rotatable, however arranged longitudinally displaceable on a support shaft and has two spiral and oppositely extending sliding grooves, in which the end portions of the actuator pins of two actuating devices (with only one Aktuatorstift) are alternately coupled. While the axial course of the sliding groove engaged with the associated actuator pin causes the cam piece to move from one cam position to the other camshaft in self-control and camshaft angle, the radial course of each slide groove is designed to increase towards the end of the shifting operation flatten and the currently engaged actuator pin from its working position shifted back to the rest position.

Im Falle des in der DE 196 11 641 C1 vorgeschlagenen Ventiltriebs mit drei benachbarten Nocken und zwei mit geringem Abstand angeordneten Aktuatorstiften erscheint es zweckmäßig, die Aktuatorstifte in einem gemeinsamen Gehäuse zu integrieren.In case of in the DE 196 11 641 C1 proposed valve train with three adjacent cams and two arranged at a small distance actuator pins, it seems appropriate to integrate the actuator pins in a common housing.

Eine Stellvorrichtung mit einer Gruppe unabhängig voneinander verfahrbarer Aktuatorstifte, die in einem gemeinsamen Gehäuse gelagert sind und mit elektromagnetisch kraftbeaufschlagten Sperrstiften in der oben genannten Weise zusammenwirken, geht aus der als gattungsbildend betrachteten DE 10 2006 051 809 A1 hervor. Die elektromagnetische Kraftbeaufschlagung der Sperrstifte erfolgt mittels daran befestigten Magnetankern, die mit zugehörigen Magnetspulen jeweils einen Elektrohubmagneten bilden. Im Falle von zwei Aktuatorstiften sind somit auch zwei derartige Elektrohubmagneten bei entsprechend hohem Aufwand für Herstellung und Montage der Stellvorrichtung erforderlich.An actuator with a group of independently movable actuator pins, which are mounted in a common housing and cooperate with electromagnetically kraftbeaufschlagten locking pins in the above manner, goes from the considered generic DE 10 2006 051 809 A1 out. The electromagnetic force is applied to the locking pins by means of magnetic anchors attached thereto, each of which forms a Elektrohubmagneten associated with magnetic coils. In the case of two actuator pins thus two such Elektrohubmagneten are required at a correspondingly high cost of manufacture and installation of the actuator.

Diese Betrachtung trifft in gleicher Weise für eine Stellvorrichtung gemäß der DE 10 2007 024 598 A1 zu, falls eine Gruppe von Aktuatorstiften in einem gemeinsamen Gehäuse zusammengefasst werden soll.This consideration applies equally to an actuator according to the DE 10 2007 024 598 A1 to, if a group of actuator pins in a common housing to be summarized.

In der WO 03/021612 A1 ist eine Stellvorrichtung vorgeschlagen, deren Betätigung auf dem Zusammenspiel eines Elektromagneten mit einem am Aktuatorstift befestigten Permanentmagneten basiert. Aufgrund dessen magnetischer Anziehungskraft haftet der in Ausfahrrichtung federkraftbeaufschlagte Aktuatorstift am unbestromten Elektromagneten. Zum Lösen des Aktuatorstifts aus dieser Ruheposition ist lediglich eine impulsförmige Strombeaufschlagung des Elektromagneten zur Überwindung der magnetischen Anziehungskraft des Permanentmagneten erforderlich, wobei der Aktuatorstift nicht nur durch die Kraft des Federmittels sondern auch durch die Kraft eines magnetischen Abstoßungseffekts zwischen dem Permanentmagneten und dem bestromten Elektromagneten in Richtung der Arbeitsposition beschleunigt wird.In the WO 03/021612 A1 is proposed an actuating device whose operation on the interaction of an electromagnet with a on Aktuatorstift fixed permanent magnets based. Due to its magnetic attraction of the spring-loaded in the extension direction actuator pin adheres to the de-energized electromagnet. To release the actuator pin from this rest position, only a pulse-shaped current loading of the electromagnet is required to overcome the magnetic attraction of the permanent magnet, the Aktuatorstift not only by the force of the spring means but also by the force of a magnetic repulsion effect between the permanent magnet and the energized electromagnet in the direction the working position is accelerated.

Eine konstruktive Weiterentwicklung dieses Funktionsprinzips ist in der DE 20 2008 008 142 U1 offenbart. Der Aktuatorstift wird dort lediglich durch die magnetische Anziehungskraft an einem Permanentmagneten gehalten, so dass durch gegenseitig exzentrische Anordnung von Aktuatorstiften und Permanentmagneten/Elektromagneten eine kompakte Bauweise der Stellvorrichtung mit zwei oder drei Aktuatorstiften in einem gemeinsamen Gehäuse ermöglicht wird.A constructive development of this functional principle is in the DE 20 2008 008 142 U1 disclosed. The actuator pin is held there only by the magnetic attraction force on a permanent magnet, so that a mutually eccentric arrangement of actuator pins and permanent magnets / electromagnets a compact design of the actuator with two or three actuator pins in a common housing is made possible.

Abgesehen von dem gemeinsamen Gehäuse erfordern alle genannten Stellvorrichtungen mit mehreren Aktuatorstiften einen erheblichen Herstell- und Montageaufwand, da sich kostenseitige Synergieeffekte hauptsächlich nur durch das gemeinsame Gehäuse ergeben.Apart from the common housing, all mentioned actuators with multiple actuator pins require a considerable manufacturing and assembly effort, since cost-side synergy effects arise mainly only through the common housing.

Aufgabe der ErfindungObject of the invention

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Stellvorrichtung der eingangs genannten Art so fortzubilden, dass die Stellvorrichtung nicht nur einen möglichst geringen Bauraum beansprucht und einen geringen Abstand der Aktuatorstifte aufweist, sondern auch möglichst aufwandsarm herstell- und montierbar ist.The present invention is therefore the object of an adjusting device of the type mentioned in such a way that the adjusting device not only takes up the smallest possible space and has a small distance of the actuator pins, but also as little as possible manufacturable and mountable.

Zusammenfassung der ErfindungSummary of the invention

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Anspruchs 1, während vorteilhafte Weiterbildungen und Ausgestaltungen den Unteransprüchen entnehmbar sind. Demnach wird die Aufgabe dadurch gelöst, dass die Stellvorrichtung einen den Sperrstiften gemeinsam zugeordneten Elektromagneten mit umkehrbarer Richtung des Magnetfelds aufweist und den Aktuatorstiften abgewandte Endabschnitte der Sperrstifte mit zweipolig magnetisierten Permanentmagneten versehen sind, die in die Verfahrrichtung entgegengesetzt gepolt zueinander ausgerichtet sind.The solution to this problem arises from the features of claim 1, while advantageous developments and refinements the dependent claims are removed. Accordingly, the object is achieved in that the adjusting device has a locking pins together associated electromagnet with reversible direction of the magnetic field and the actuator pins facing away from end portions of the locking pins are provided with two pole magnetized permanent magnets, which are oppositely poled in the direction of travel to each other.

Infolgedessen ist lediglich ein mit umkehrbarer Polung bestromter Elektromagnet für zwei unabhängig voneinander verfahrbare Aktuatorstifte erforderlich.As a result, only one energized with reversible polarity solenoid for two independently movable actuator pins is required.

Die entgegengesetzte Ausrichtung der Permanentmagnetpole führt dazu, dass bei Bestromung des Elektromagneten dasselbe Magnetfeld den ersten Permanentmagneten anzieht und den zweiten Permanentmagneten abstößt. Hierbei verlagert sich der mit dem ersten Permanentmagneten verbundene Sperrstift entgegen der Kraft des weiteren Federmittels in Richtung des Elektromagneten, d.h. in Einfahrrichtung des zugehörigen ersten Aktuatorstifts, der sich bei jetzt gelöster Rastierung in dessen Arbeitsposition verlagert. Demgegenüber verbleiben der mit dem zweiten Permanentmagneten verbundene Sperrstift und der zugehörige zweite Aktuatorstift in Ruhe.The opposite orientation of the permanent magnet poles leads to the same magnetic field attracting the first permanent magnet and repelling the second permanent magnet when the electromagnet is energized. In this case, the locking pin connected to the first permanent magnet displaces against the force of the further spring means in the direction of the electromagnet, i. in the retraction of the associated first Aktuatorstifts that moves in now released detent in its working position. In contrast, the locking pin connected to the second permanent magnet and the associated second actuator pin remain at rest.

Bei entgegengesetzt gepolter Bestromung des Elektromagneten kehrt sich die Wirkung des Magnetfelds um, so dass nunmehr der zweite Permanentmagnet angezogen wird, während der erste Permanentmagnet abgestoßen wird. Ausgangspunkt hierfür ist wiederum der Zustand, dass beide Aktuatorstifte mittels der Rastierungen in deren Ruhepositionen gehalten sind. In analoger Weise verlagert sich nun der zweite Aktuatorstift in dessen Arbeitsposition, während der erste Aktuatorstift in seiner Ruheposition verharrt.With opposite polarity current supply of the electromagnet, the effect of the magnetic field reverses, so that now the second permanent magnet is attracted while the first permanent magnet is repelled. The starting point for this, in turn, is the condition that both actuator pins are held in their rest positions by means of the detents. In an analogous manner, the second actuator pin now shifts into its working position, while the first actuator pin remains in its rest position.

In Weiterbildung der Erfindung sollen die Permanentmagnete bei Anlage der den Aktuatorstiften abgewandten Endabschnitte der Sperrstifte an einem stationären Kernbereich des Elektromagneten zu dem Kernbereich beabstandet verlaufen. Durch diese Maßnahme kann die im Nahbereich zum Elektromagneten exponentiell ansteigende Kraftwirkung der Permanentmagneten auf ein solches Maß begrenzt werden, dass bei stromlosem Elektromagneten eine ausreichende, die Sperrstifte rückstellende Kraftwirkung der weiteren Federmittel verbleibt.In a further development of the invention, the permanent magnets are intended to extend at a distance from the core of the electromagnet to the core area when the end sections of the locking pins facing away from the actuator pins bear against one another. As a result of this measure, the force effect of the permanent magnets, which increases exponentially in the vicinity of the electromagnet, can be limited to such a degree that, when the electromagnet is de-energized, a sufficient force effect of the further spring means resetting the blocking pins remains.

In konstruktiv zweckmäßiger Weise bildet dabei der Kernbereich eine ebene Anlagefläche für die Sperrstifte, wobei die den Aktuatorstiften abgewandten Endabschnitte der Sperrstifte gegenüber den Permanentmagneten erhaben verlaufen.In a constructively expedient manner, the core region forms a planar contact surface for the locking pins, wherein the end portions of the locking pins facing away from the actuator pins are raised in relation to the permanent magnets.

In bevorzugter Ausgestaltung sollen die Rastierungen jeweils durch folgende Merkmale gebildet sein:

  • ▪ eine im Aktuatorstift verlaufende Längsbohrung zur Aufnahme des Sperrstifts und eine oder mehrere die Längsbohrung schneidende Querbohrungen,
  • ▪ eine am Sperrstift ausgebildete erste Stützfläche und eine im Gehäuse ausgebildete zweite Stützfläche, wobei zumindest eine der Stützflächen gegenüber der Verfahrrichtung geneigt verläuft,
  • ▪ und Rastkörper, die in den Querbohrungen beweglich angeordnet und in der Ruheposition zwischen den Stützflächen eingespannt sind.
In a preferred embodiment, the detents should each be formed by the following features:
  • A longitudinal bore extending in the actuator pin for receiving the locking pin and one or more transverse bores cutting the longitudinal bore,
  • A first support surface formed on the locking pin and a second support surface formed in the housing, wherein at least one of the support surfaces is inclined with respect to the direction of travel,
  • ▪ and locking bodies, which are arranged movably in the transverse bores and clamped in the rest position between the support surfaces.

Bei einer solchen, auf Form- oder Reibschluss basierenden Rastierung sind nur kleine Wirkflächen erforderlich, um den zugehörigen Aktuatorstift entgegen der Kraft des Federmittels sicher in dessen Ruheposition zu halten. Im Gegensatz zu den so erzeugbaren Haltekräften sind die erforderlichen Kräfte zum Lösen der Rastierung um ein Vielfaches geringer, da neben der Kraft des den Sperrstift beaufschlagenden weiteren Federmittels lediglich die zwischen den Rastkörpern und den Stützflächen wirkenden Reibkräfte zu überwinden sind. Der bzw. die Rastkörper sind bevorzugt als Kugeln ausgebildet, wie sie als extrem kostengünstiges Massenprodukt einer Wälzkörperfertigung entnehmbar sind. Dabei können drei Kugeln und drei gleichmäßig über den Umfang des Aktuatorstifts verteilte Querbohrungen vorgesehen sein. Diese Anordnung ist gegenüber lediglich einem Rastkörper insoweit vorteilhaft, als entweder bei identischer Dimensionierung der Rastkörper größere Haltekräfte erzeugbar sind oder bei kleinerer Dimensionierung der Rastkörper - entsprechend einem weiterhin reduzierten Bauraumbedarf der Rastierung - die gegebenenfalls bereits ausreichende Haltekraft nur eines Rastkörpers erzeugbar ist. Zum anderen führt die Anordnung der um 120° umfangsverteilten Kugeln zu einer mechanisch günstigen, zentrierten Abstützung des Sperrstifts in der Längsbohrung des Aktuatorstifts. Dennoch sind selbstverständlich auch Anordnungen mit lediglich einer, zwei, vier oder mehr Kugeln möglich.In such, based on form or frictional engagement detent only small effective areas are required to keep the associated actuator pin against the force of the spring means safely in its rest position. In contrast to the holding forces which can be generated in this way, the forces required to release the detent are many times lower, since in addition to the force of the further spring means acting on the detent pin, only the frictional forces acting between the detent bodies and the support surfaces have to be overcome. The one or more locking bodies are preferably formed as balls, as they are removable as an extremely cost-effective mass product of a rolling element. In this case, three balls and three evenly distributed over the circumference of the actuator pin transverse bores may be provided. This arrangement is advantageous over only one detent body insofar as greater holding forces can be generated either with identical dimensioning of the detent body or with smaller dimensions of the detent body - corresponding to a further reduced space requirement of the detent - the possibly already sufficient holding force of only one detent body can be generated. On the other hand, the arrangement of circumferentially distributed by 120 ° balls leads to a mechanically favorable, centered support of the locking pin in the longitudinal bore of the actuator pin. Nevertheless, of course, arrangements with only one, two, four or more balls are possible.

Außerdem können die Kugeln selbsthemmend zwischen den Stützflächen eingespannt sein, wobei die Stützflächen einen konstanten oder einen sich in die Einfahrrichtung verkleinernden Abstand zueinander aufweisen. Beispielsweise kann die zweite Stützfläche parallel zur Verfahrrichtung des Aktuatorstifts verlaufen und Teil einer fertigungsgünstig durchgehend zylindrischen Längsführung für den Aktuatorstift sein. Bei der konstruktiven Auslegung der Stützflächen sind selbstverständlich sowohl die Kräfte der Federmittel als auch die Reibungsverhältnisse an den Kugel-Stützflächen-Kontakten zu berücksichtigen, so dass der für eine einwandfreie Funktion der Rastierung erforderliche Bereich der Selbsthemmung an diesen Kontakten nicht verlassen wird.In addition, the balls may be self-locking clamped between the support surfaces, wherein the support surfaces have a constant or a decreasing in the retraction distance from each other. For example, the second support surface may be parallel to the direction of travel of the actuator pin and be part of a production-wise continuous cylindrical guide for the Aktuatorstift. In the structural design of the support surfaces, of course, both the forces of the spring means and the friction conditions on the ball-support surface contacts are taken into account, so that the required for proper function of the detent region of self-locking is not left at these contacts.

Dabei ist es zweckmäßig, dass sich die erste Stützfläche am Sperrstift in die Ausfahrrichtung radial verjüngt und dass die Stützflächen parallel zueinander verlaufen. Im Falle rotationssymmetrischer Stützflächen sind dann die Stützflächen kreiskegelstumpfförmig ausgebildet. Diese Ausgestaltung ermöglicht einen besonders verschleißarmen Gleit- oder Wälzkontakt zwischen den Kugeln und den Stützflächen, wenn der Aktuatorstift die Ruheposition verlässt und wieder erreicht.It is expedient that the first support surface on the locking pin in the extension direction radially tapers and that the support surfaces are parallel to each other. In the case of rotationally symmetrical support surfaces then the support surfaces are formed kreisflgelstumpfförmig. This embodiment allows a particularly low-wear sliding or rolling contact between the balls and the support surfaces when the actuator pin leaves the rest position and reached again.

Kurze Beschreibung der ZeichnungShort description of the drawing

Weitere Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung und aus der einzigen Figur, in der ein Ausführungsbeispiel einer erfindungsgemäßen elektromagnetischen Stellvorrichtung im Längsschnitt dargestellt ist.Further features of the invention will become apparent from the following description and from the single figure, in which an embodiment of an electromagnetic actuator according to the invention is shown in longitudinal section.

Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

Die Figur offenbart eine Stellvorrichtung 1, die zur Ansteuerung eines eingangs erläuterten hubvariablen Ventiltriebs mit verschiebbaren Nockenstücken dient (siehe DE 196 11 641 C1 ). Bei der Stellvorrichtung 1 handelt es sich um eine in den Zylinderkopf der Brennkraftmaschine montierbare Baueinheit mit einem Gehäuse 2 und zwei darin angeordneten, hohlzylindrisch ausgebildeten Aktuatorstiften 3 und 4. Die als Gleichteile ausgebildeten Aktuatorstift 3, 4 sind in Längsführungen 5 des Gehäuses 2 gelagert und können unabhängig voneinander zwischen einer in das Gehäuse 2 eingefahrenen Ruheposition (wie dargestellt) und einer aus dem Gehäuse 2 ausgefahrenen Arbeitsposition hin und her verfahren. Wie vorstehend erläutert, sind die Aktuatorstifte 3, 4 in der (nicht dargestellten) Arbeitsposition mit einer zugehörigen Verschiebenut in Eingriff, um das Nockenstück zu verschieben.The figure discloses an adjusting device 1, which is used to control a lift-variable valve drive described above with sliding cam pieces (see DE 196 11 641 C1 ). The adjusting device 1 is an assembly which can be mounted in the cylinder head of the internal combustion engine and has a housing 2 and two hollow cylindrical actuator pins 3 and 4. The actuator pins 3, 4 designed as identical parts are mounted in longitudinal guides 5 of the housing 2 and can be mounted moved independently between a retracted into the housing 2 rest position (as shown) and an extended from the housing 2 working position back and forth. As explained above, in the working position (not shown), the actuator pins 3, 4 are engaged with an associated slide groove to displace the cam piece.

Die von Federmitteln - hier Schraubendruckfedern 6 - in die Ausfahrrichtung kraftbeaufschlagten Aktuatorstifte 3, 4 werden von Rastierungen in der Ruheposition gehalten. Ein Lösen der Rastierungen erfolgt durch ansteuerbare Sperrstifte 7 und 8, die ebenfalls als Gleichteile ausgebildet und relativ zu den Aktuatorstiften 3, 4 in deren Verfahrrichtung verlagerbar sind.The spring pins - here helical compression springs 6 - in the extension direction kraftbeaufschlagten actuator pins 3, 4 are held by detents in the rest position. A release of the detents is effected by controllable locking pins 7 and 8, which are also formed as identical parts and relative to the actuator pins 3, 4 are displaced in the direction of travel.

Die miteinander identischen Rastierungen sind jeweils durch eine im Aktuatorstift 3, 4 verlaufende Längsbohrung 9 und diese schneidende Querbohrungen 10, eine am Sperrstift 7, 8 ausgebildete erste Stützfläche 11 und eine im Gehäuse 2 ausgebildete zweite Stützfläche 12 sowie drei Rastkörpern in Form von Kugeln 13 gebildet. Die in den gleichmäßig am Umfang des Aktuatorstifts 3, 4 verteilten Querbohrungen 10 beweglich angeordneten Kugeln 13 sind in der Ruheposition des Aktuatorstifts 3, 4 zwischen den Stützflächen 11 und 12 eingespannt. Hierzu verjüngt sich der in der Längsbohrung 9 verlaufende Endabschnitt 14 des Sperrstifts 7, 8 konisch in Ausfahrrichtung des Aktuatorstifts 3, 4, so dass die erste Stützfläche 11 die Außenmantelfläche eines Kreiskegelstumpfs bildet. Die zweite Stützfläche 12 im Gehäuse 2 verläuft mit konstantem Abstand dazu und bildet folglich die Innenmantelfläche eines Kreiskegelstumpfs.The mutually identical detents are each by a running in the actuator pin 3, 4 longitudinal bore 9 and these intersecting transverse bores 10, a formed on the locking pin 7, 8 first support surface 11 and formed in a housing 2 second support surface 12 and three locking bodies in the form of balls 13 are formed. The spherically arranged in the evenly on the circumference of the actuator pin 3, 4 transverse bores 10 balls 13 are clamped in the rest position of the actuator pin 3, 4 between the support surfaces 11 and 12. For this purpose, the extending in the longitudinal bore 9 end portion 14 of the locking pin 7, 8 tapers conically in the extension direction of the Aktuatorstifts 3, 4, so that the first support surface 11 forms the outer circumferential surface of a circular truncated cone. The second support surface 12 in the housing 2 extends at a constant distance thereto and thus forms the inner circumferential surface of a circular truncated cone.

Die Sperrstifte 7, 8 sind jeweils durch ein weiteres Federmittel - hier eine Schraubendruckfeder 15 - ebenfalls in die Ausfahrrichtung kraftbeaufschlagt. Der Neigungswinkel der Stützflächen 11, 12 gegenüber der Verfahrrichtung des Aktuatorstifts 3, 4 ist unter Berücksichtigung der auf den Sperrstift 7, 8 und den Aktuatorstift 3, 4 wirkenden Federkräfte sowie der Reibungsverhältnisse an den Kugel-Stützflächen-Kontakten so gewählt, dass die Kugeln 13 selbsthemmend zwischen den Stützflächen 11, 12 eingespannt sind und so den Aktuatorstift 3, 4 sicher in der Ruheposition fixieren. Der Neigungswinkel beträgt vorliegend etwa 5°.The locking pins 7, 8 are each acted upon by a further spring means - here a helical compression spring 15 - also in the extension direction. The angle of inclination of the support surfaces 11, 12 relative to the direction of movement of the actuator pin 3, 4 is chosen taking into account the force acting on the locking pin 7, 8 and the actuator pin 3, 4 spring forces and the friction conditions on the ball-support surface contacts that the balls 13th self-locking between the support surfaces 11, 12 are clamped and so fix the actuator pin 3, 4 securely in the rest position. The inclination angle is presently about 5 °.

Die konzentrischen Schraubendruckfedern 6, 15 stützen sich einerseits an im Gehäuse 2 eingepressten Buchsen 16 und andererseits an kreisringförmigen Stirnflächen 17 und 18 der Aktuatorstifte 3, 4 bzw. der Sperrstifte 7, 8 ab. Die Sperrstifte 7, 8 werden zum Lösen der Rastierungen elektromagnetisch kraftbeaufschlagt in die Einfahrrichtung der Aktuatorstifte 3, 4 verlagert und sind zu diesem Zweck an ihren den Aktuatorstiften 3, 4 abgewandten Endabschnitten 19 mit daran befestigten Permanentmagneten 20 bzw. 21 versehen. Erfindungsgemäß sind diese zweipolig axial magnetisiert, in Verfahrrichtung der Aktuatorstifte 3, 4 bezüglich ihrer mit N und S bezeichneten Nord- und Südpole entgegengesetzt zueinander ausgerichtet und dem Magnetfeld eines einzigen Elektromagneten 22 ausgesetzt.The concentric helical compression springs 6, 15 are based, on the one hand, on bushings 16 pressed into the housing 2 and, on the other hand, on annular end faces 17 and 18 of the actuator pins 3, 4 or the locking pins 7, 8. The locking pins 7, 8 are electromagnetically kraftbeaufschlagt for releasing the detents in the retraction of the actuator pins 3, 4 and are provided for this purpose at their the actuator pins 3, 4 opposite end portions 19 with permanent magnets 20 and 21 attached thereto. According to the invention, these two-pole magnets are axially magnetized, aligned in the direction of travel of the actuator pins 3, 4 with respect to their north and south poles designated N and S, and exposed to the magnetic field of a single electromagnet 22.

Der Elektromagnet 22 umfasst als wesentliche Bauteile eine Magnetspule 23, einen stationären Kernbereich 24 und einen 2-poligen Steckverbinder 25 als Gleichstromanschluss für die Magnetspule 23. Der koaxial in der Magnetspule 23 verlaufende Kernbereich 24 weist seitens der Permanentmagnete 20, 21 eine Schulter auf, die eine ebene Anlagefläche 26 für die Sperrstifte 7, 8 bildet. Eine stark haftende Anlage der Permanentmagnete 20, 21 an der Anlagefläche 26 wird dadurch vermieden, dass die Endabschnitte 19 der Sperrstifte 7, 8 gegenüber den Permanentmagneten 20, 21 erhaben verlaufen und diese stets einen entsprechenden Mindestabstand zur Anlagefläche 26 aufweisen.The solenoid 22 includes as essential components a magnetic coil 23, a stationary core portion 24 and a 2-pin connector 25 as a DC terminal for the magnetic coil 23. The coaxially extending in the magnetic coil 23 core portion 24 has on the part of the permanent magnets 20, 21 a shoulder, the a flat contact surface 26 for the locking pins 7, 8 forms. A strongly adhering contact of the permanent magnets 20, 21 on the abutment surface 26 is avoided in that the end portions 19 of the locking pins 7, 8 are raised with respect to the permanent magnets 20, 21 and they always have a corresponding minimum distance to the abutment surface 26.

Die Funktionsweise der Stellvorrichtung 1 ist wie folgt: wird an den Elektromagneten 22 Stromspannung mit einer ersten Polung (+/-) angelegt, so zieht das dabei entstehende Magnetfeld einen Permanentmagneten 20 oder 21 an und stößt den anderen Permanentmagneten 21 oder 20 infolge seiner umgekehrten Polung ab. Während der abgestoßene Permanentmagnet 21 oder 20, der zugehörige Sperrstift 8 oder 7 und folglich auch der zugehörige Aktuatorstift 4 oder 3 aufgrund der zugehörigen nicht gelösten Rastierung in Ruhe verbleiben, wird der mit dem einen Permanentmagneten 20 oder 21 angezogene Sperrstift 7 oder 8 bis zur Anlagefläche 26 in Einfahrrichtung verlagert. Dabei löst sich die zugehörige Rastierung, indem die Klemmwirkung der Kugeln 13 gegenüber den Stützflächen 11, 12 aufgehoben wird. Während die Kugeln 13 der Neigung der zweiten Stützfläche 12 im Gehäuse 2 folgen und sich radial einwärts in den Querbohrungen 10 verlagern, wird der Aktuatorstift 3 oder 4 durch die Kraft der Schraubendruckfeder 6 in seine Arbeitsposition getrieben. Der Elektromagnet 22 wird daraufhin stromlos geschaltet, so dass der angezogene Sperrstift 7 oder 8 durch die Kraft der Schraubendruckfeder 15 in seine Ausgangslage zurückkehrt.The operation of the adjusting device 1 is as follows: applied to the electromagnet 22 voltage with a first polarity (+/-), the resulting magnetic field attracts a permanent magnet 20 or 21 and abuts the other permanent magnet 21 or 20 due to its reverse polarity from. While the repelled permanent magnet 21 or 20, the associated locking pin 8 or 7 and consequently also the associated actuator pin 4 or 3 remain at rest due to the associated non-dissolved detent, with the one permanent magnet 20 or 21 attracted locking pin 7 or 8 to the contact surface 26 shifted in the retraction direction. In this case, the associated detent detaches by the clamping action of the balls 13 relative to the support surfaces 11, 12 is released. While the balls 13 follow the inclination of the second support surface 12 in the housing 2 and move radially inwardly in the transverse bores 10, the actuator pin 3 or 4 is driven by the force of the helical compression spring 6 in its working position. The solenoid 22 is then de-energized, so that the attracted locking pin 7 or 8 returns by the force of the helical compression spring 15 to its original position.

Wie eingangs erwähnt, wird der in Eingriff befindliche Aktuatorstift 3 oder 4 durch den sich radial erhebenden Auslaufbereich der Verschiebenut zurück in dessen Ruheposition geschoben und dort wieder verrastet. Dies erfolgt dadurch, dass die Kugeln 13 dem geneigten Verlauf der ersten Stützfläche 11 am Sperrstift 7 oder 8 folgen, sich radial auswärts in den Querbohrungen 10 verlagern und unter Selbsthemmung zwischen den Stützflächen 11, 12 eingespannt werden.As mentioned above, the engaged actuator pin 3 or 4 is pushed by the radially rising outlet region of the sliding groove back into its rest position and locked there again. This is done by the balls 13 the inclined course of the first support surface 11 on Follow locking pin 7 or 8, move radially outward in the transverse bores 10 and are clamped under self-locking between the support surfaces 11, 12.

Während der Aktuatorstift 3 oder 4 nachfolgend in dessen verrasteter Ruheposition verbleibt, wird die Betätigung des anderen Aktuatorstifts 4 oder 3 dadurch eingeleitet, dass an den Elektromagneten 22 nunmehr Stromspannung mit zur ersten Polung (+/-) umgekehrter zweiter Polung (-/+) angelegt wird. Die umgekehrte Wirkrichtung des jetzt entstehenden Magnetfelds stößt den einen Permanentmagneten 20 oder 21 ab und zieht den anderen Permanentmagneten 21 oder 20 an. Der weitere Stellverlauf des anderen Aktuatorstifts 4 oder 3 erfolgt in identischer Weise wie vorstehend erläutert.While the actuator pin 3 or 4 subsequently remains in its latched rest position, the actuation of the other actuator pin 4 or 3 is initiated by applying voltage to the electromagnet 22 with the second polarity (- / +) reversed to the first polarity (+/-) becomes. The reverse effective direction of the magnetic field now arising repels the one permanent magnet 20 or 21 and attracts the other permanent magnet 21 or 20 at. The further control curve of the other actuator pin 4 or 3 takes place in an identical manner as explained above.

Liste der BezugszahlenList of reference numbers

11
Stellvorrichtunglocking device
22
Gehäusecasing
33
Aktuatorstiftactuator pin
44
Aktuatorstiftactuator pin
55
Längsführunglongitudinal guide
66
SchraubendruckfederHelical compression spring
77
Sperrstiftlocking pin
88th
Sperrstiftlocking pin
99
Längsbohrunglongitudinal bore
1010
Querbohrungcross hole
1111
erste Stützflächefirst support surface
1212
zweite Stützflächesecond support surface
1313
KugelBullet
1414
Endabschnitt des SperrstiftsEnd portion of the locking pin
1515
SchraubendruckfederHelical compression spring
1616
BuchseRifle
1717
Stirnfläche am AktuatorstiftFace on Aktuatorstift
1818
Stirnfläche am SperrstiftEnd face on the locking pin
1919
Endabschnitt des SperrstiftsEnd portion of the locking pin
2020
Permanentmagnetpermanent magnet
2121
Permanentmagnetpermanent magnet
2222
Elektromagnetelectromagnet
2323
Magnetspulesolenoid
2424
stationärer Kernbereichstationary core area
2525
SteckverbinderConnectors
2626
Anlagefläche am KernbereichContact surface at the core area

Claims (9)

  1. Electromagnetic actuating device (1) having a housing (2) and two actuator pins (3, 4) which are mounted in the housing (2) such that they can move independently of one another between a rest position, in which they are retracted into the housing (2), and a working position, in which they are deployed out of the housing (2), said actuator pins being loaded with force in the deployment direction by a spring means (6), and blocking pins (7, 8) which hold the actuator pins (3, 4) in the rest position by detent means and are displaceable relative to the actuator pins (3, 4) in the movement direction of the latter, wherein the blocking pins (7, 8) are loaded with force in the deployment direction by further spring means (15) and, in order to release the detent means, are displaced in the retraction direction under the action of electromagnetic force, and wherein the actuating device (1) has an electromagnet (22) which is assigned to the blocking pins (7, 8) jointly and which has a reversible direction of the magnetic field, and those end sections (19) of the blocking pins (7, 8) which face away from the actuator pins (3, 4) are provided with permanent magnets (20, 21) with bipolar magnetization, said permanent magnets being oriented with opposite polarity with respect to one another in the movement direction.
  2. Actuating device (1) according to Claim 1, characterized in that, in the event of abutment of those end sections (19) of the blocking pins (7, 8) which face away from the actuator pins (3, 4) against a static core region (24) of the electromagnet (22), the permanent magnets (20, 21) run spaced apart from the core region (24).
  3. Actuating device (1) according to Claim 2, characterized in that the core region (24) forms a planar abutment surface (26) for the blocking pins (7, 8), wherein those end sections (19) of the blocking pins (7, 8) which face away from the actuator pins (3, 4) run in an elevated manner with respect to the permanent magnets (20, 21).
  4. Actuating device (1) according to Claim 1, characterized in that the detent means are formed in each case by the following features:
    - a longitudinal bore (9), which runs in the actuator pin (3, 4), for receiving the blocking pin (7, 8), and one or more transverse bores (10) which intersect the longitudinal bore (9),
    - a first support surface (11) formed on the blocking pin (7, 8) and a second support surface (12) formed in the housing (2), wherein at least one of the support surfaces (11, 12) runs obliquely with respect to the movement direction,
    - and detent bodies (13) which are arranged in a movable manner in the transverse bores (10) and which, in the rest position, are clamped between the support surfaces (11, 12).
  5. Actuating device (1) according to Claim 4, characterized in that the detent bodies (13) are formed as balls.
  6. Actuating device (1) according to Claim 5, characterized in that three balls (13) and three transverse bores (10) distributed uniformly over the circumference of the actuator pin (3, 4), are provided.
  7. Actuating device (1) according to Claim 5, characterized in that the balls (13) are clamped in a self-impeding manner between the support surfaces (11, 12), wherein the support surfaces (11, 12) have a spacing to one another which is constant or which decreases in size in the retraction direction.
  8. Actuating device (1) according to Claim 7, characterized in that the first support surface (11) tapers radially in the deployment direction and in that the support surfaces (11, 12) run parallel to one another.
  9. Actuating device (1) according to Claim 8, characterized in that the support surfaces (11, 12) are of circular frustoconical form.
EP10705325.8A 2009-02-27 2010-02-11 Electromagnetic actuating device Not-in-force EP2401479B1 (en)

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DE102009010949A DE102009010949A1 (en) 2009-02-27 2009-02-27 Electromagnetic actuator
PCT/EP2010/051715 WO2010097298A1 (en) 2009-02-27 2010-02-11 Electromagnetic actuating device

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EP (1) EP2401479B1 (en)
CN (1) CN102333936B (en)
DE (2) DE102009010949A1 (en)
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DE202009015466U1 (en) 2010-03-18
EP2401479A1 (en) 2012-01-04
DE102009010949A1 (en) 2010-09-02
US8339225B2 (en) 2012-12-25
WO2010097298A1 (en) 2010-09-02
CN102333936A (en) 2012-01-25
CN102333936B (en) 2013-11-27
US20110240892A1 (en) 2011-10-06

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