EP2370675A1 - Electromagnetic actuating unit for a hydraulic directional control valve and method for the assembly thereof - Google Patents

Electromagnetic actuating unit for a hydraulic directional control valve and method for the assembly thereof

Info

Publication number
EP2370675A1
EP2370675A1 EP09736418A EP09736418A EP2370675A1 EP 2370675 A1 EP2370675 A1 EP 2370675A1 EP 09736418 A EP09736418 A EP 09736418A EP 09736418 A EP09736418 A EP 09736418A EP 2370675 A1 EP2370675 A1 EP 2370675A1
Authority
EP
European Patent Office
Prior art keywords
unit
yoke
pole core
armature
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09736418A
Other languages
German (de)
French (fr)
Other versions
EP2370675B1 (en
Inventor
Jens Hoppe
Stefan Konias
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2370675A1 publication Critical patent/EP2370675A1/en
Application granted granted Critical
Publication of EP2370675B1 publication Critical patent/EP2370675B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/3443—Solenoid driven oil control valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F2007/163—Armatures entering the winding with axial bearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making

Definitions

  • the invention relates to an electromagnetic actuator for a hydraulic directional control valve according to the preamble of claim 1 and a method for its assembly.
  • Such directional control valves are used for example in internal combustion engines for controlling hydraulic camshaft adjusters.
  • the proportional solenoid valve has a valve housing in which a piston is displaceable and which has a plurality of connections, via which a hydraulic oil can be supplied.
  • the proportional solenoid valve further comprises a solenoid part, with which can be adjusted via a plunger of the piston.
  • the plunger is mounted in an axial bore in a housing of the solenoid part, whereby it is axially displaceable.
  • DE 102 11 467 A1 shows a camshaft adjuster with an electromagnet, which is designed as a pushing proportional solenoid.
  • the proportional magnet has a magnet armature which sits firmly on an armature tappet, which is guided through a pole core and rests with a free end face on a control piston or on a fixedly connected to this part.
  • DE 101 53 019 A1 shows an electromagnet, which is particularly suitable as a proportional magnet for actuating a hydraulic valve.
  • the electromagnet comprises a hollow cylindrical bobbin, which is bounded by an upper pole piece and a lower pole piece.
  • the electric motor is enclosed by a magnet housing.
  • the bobbin magnetically acts on a magnetic armature, which forwards the magnetic force via a push rod for actuating the hydraulic valve.
  • the push rod is mounted in an axial bore in the lower pole piece, whereby it is axially displaceable.
  • DE 10 2004 057 873 A1 relates to a seat valve with a line system for passing an inflowing medium.
  • the seat valve has a seat and an adjustable closing element in the piping system.
  • the adjustable closure element is actuated by means of an electromagnetic actuator.
  • the electromagnetic setting device comprises an armature housing, in which an armature is arranged adjustable in the direction of a coil axis.
  • the armature is connected to an actuating element which actuates the closing element.
  • the actuator is mounted in an axial bore in the housing of the electromagnetic actuator, whereby it is axially displaceable.
  • the electromagnetic actuator comprises an armature, which is arranged axially displaceably within an armature space, and a pole core, which is arranged in a receptacle and limits the armature space in a direction of movement of the armature. Furthermore, the electromagnetic actuator comprises a coil, which is preferably encapsulated with a non-magnetizable material, so that a bobbin is formed.
  • the anchor is mounted in a sliding sleeve, whereby it is axially displaceable friction.
  • JP 2005-188630 A shows a hydraulic directional valve with an electromagnetic actuator.
  • the electromagnetic actuator comprises a coil for generating a magnetic field which is applied to an axially slidable anchor acts.
  • the armature comprises an actuating element which actuates the hydraulic directional control valve.
  • the actuator is mounted in an axial bore in the housing of the electromagnetic actuator, whereby it is axially displaceable.
  • Fig. 1 shows a further electromagnetic actuator unit according to the prior art in a longitudinal sectional view.
  • This electromagnetic actuating unit is designed for the provision of a hydraulic directional control valve designed as a central valve, which is arranged radially inside an inner rotor of a device for variably setting the control times of an internal combustion engine.
  • the electromagnetic actuator initially comprises a coil 01, which is electrically powered via a plug contact 02.
  • the coil 01 is disposed within a bobbin 03, which is made by a Umsphtzen the coil 01 with a plastic.
  • the magnetic field which can be generated by the coil 01 is transmitted via a soft iron circle, which consists of a yoke 04, a yoke plate 06, a pole core 07 and a housing 08, to an axially mounted magnet armature 09.
  • the magnetic field exerts a magnetic force on the magnet armature 09 via an air gap between the pole core 07 and the magnet armature 09.
  • This magnetic force is transmitted via a pressure pin 11 of the magnet armature 09 to a piston of the central valve (not shown).
  • the electromagnetic actuator is attached via a flange 12 of the housing 08 to the central valve or to a housing surrounding the central valve.
  • the magnetic field which can be generated by the coil 01 does not act completely in the displacement direction of the magnet armature 09, which is caused by an eccentricity of the magnet armature 09.
  • This eccentricity is due on the one hand by a game of magnet armature 09 and the pressure pin 11 in the storage.
  • the eccentricity is a consequence of a deviation from the coaxiality between an armature bearing 13 and a pole core bearing 14. This deviation may be quite large depending on the assembly concept and the tolerances of the components of the electromagnetic actuator. Due to the eccentricity of the magnet armature 09, parts of the magnetic field which can be generated by the coil 01 act laterally on the magnet armature 09, whereby the magnet armature is laterally exposed 09 acting forces are generated.
  • the object of the present invention starting from the electromagnetic actuator shown in Fig. 1 is to provide an improved electromagnetic actuator, which is due to greater possible tolerances of the individual components on the one hand particularly inexpensive to produce, on the other hand has a good durability by good concentricity of the bearings.
  • the object is achieved by an electromagnetic actuator with the features of claim 1 and by a method for their assembly with the features of the method claim 8.
  • the electromagnetic actuator serves to adjust a hydraulic directional control valve, for example for the variable adjustment of the timing of an internal combustion engine.
  • the electromagnetic actuator comprises first in a known manner a coil with which a magnetic field can be generated.
  • the actuating unit further comprises an anchor unit with an armature and a pressure pin.
  • the pressure pin forms an actuator of the electromagnetic actuator. With the help of the pressure pin can be acted on the hydraulic directional control valve to adjust this.
  • the armature unit is slidably mounted in two bearings along its axis.
  • This axis is usually formed by an axis of symmetry of the armature unit, which in a typical ideal construction of electromagnetic actuators is identical to the axis of symmetry of the armature and / or the coil.
  • the anchor acts on the pressure pin, which dictates the axial displacement movement.
  • the armature and the pressure pin execute the axial displacement movement together.
  • the armature is located in the magnetic field of the coil, whereby a magnetic force acts on it, which causes the displacement movement.
  • the pressure pin follows the axial displacement movement of the armature due to the fixed connection with this.
  • the anchor unit is stored in two storage locations.
  • a first bearing point is provided in a yoke unit, in which the armature is mounted axially displaceable.
  • a second, provided in a Polkerntician storage serves as storage for the firmly connected to the anchor pressure pin. Through this second bearing point of the pressure pin is passed.
  • the storage allows axial displacement movement of the pressure pin, d. H. a movement in the direction of its longitudinal axis.
  • the pressure pin is mounted in both bearings and passed through a central bore of the armature and fixed in this, so that the armature is mounted firmly on the pressure pin.
  • the method according to the invention can be used particularly advantageously, because the pressure pin itself forms the longitudinal axis of the anchor unit and at least the anchor does not contribute to the storage as a tolerance-related part.
  • At least one of the two bearing points is radially exposed during assembly, ie "floating".
  • the fixation can be done for example by gluing, soldering, welding, embossing, flanging or clamping.
  • the orientation of the bearings is realized in a preferred embodiment of the invention by a centering, which is introduced as a centering aid in the coil and in which the bearings are aligned coaxially with the longitudinal axis of the anchor unit.
  • a centering which is introduced as a centering aid in the coil and in which the bearings are aligned coaxially with the longitudinal axis of the anchor unit.
  • the coil is preferably arranged within a bobbin and has a hollow cylindrical basic shape.
  • the armature, a yoke unit with yoke and cover, and a pole core unit with a pole core and a magnet housing are preferably arranged in the hollow hollow cylindrical basic shape of the bobbin.
  • the armature, the yoke and the pole core are rotationally symmetrical, wherein the axes of rotation of the hollow cylindrical basic shape of the bobbin, the armature, the yoke and the pole core coincide. These axes of rotation form the axis of the electromagnetic actuator, in which the armature moves translationally with the pressure pin.
  • the bobbin is preferably received positively with its lateral surface and a base surface of the housing. As a result, a secure assembly of the bobbin is ensured with respect to the hydraulic directional control valve, so that large forces for the adjustment of the hydraulic directional control valve are transferable.
  • the electromagnetic actuator according to the invention is particularly suitable for providing a designed as a central valve hydraulic directional control valve.
  • the central valve is arranged radially inside an inner rotor of a device for variably setting the control times of an internal combustion engine. Such actuators are also referred to as central magnet.
  • the electromagnetic actuator according to the invention is also suitable for adjusting other hydraulic directional valves, for example, in applications outside of internal combustion engines.
  • Fig. 1 an electromagnetic actuator for a hydraulic directional control valve according to the prior art
  • FIG. 3 shows a second embodiment of the invention with two splices
  • FIG. 5 shows a fourth embodiment of the invention with a splice between the yoke unit and the pole core unit;
  • FIG. 6 shows a fifth embodiment of the invention with a solder joint between yoke unit and pole core unit; 7 shows two illustrations of a sixth embodiment of the invention with a crimping point between the yoke unit and the pole core unit;
  • Fig. 8 two illustrations of a seventh embodiment of the invention with retaining lugs
  • Fig. 10 two illustrations of a ninth embodiment of the invention with a splice between pole core and housing.
  • FIG. 1 shows an electromagnetic setting unit for a hydraulic directional valve for variably setting the control times of an internal combustion engine, as is known from the prior art and has already been explained in the introduction to the description.
  • the several embodiments of the electromagnetic actuator according to the invention which are described in FIGS. 2 to 11, initially (as well as the setting unit shown in FIG. 1 according to the prior art) have a coil 01, a plug contact 02, a bobbin 03rd , a yoke 04, a yoke plate 06, a pole core 07, a housing 08, a magnet armature 09 and a pressure pin 11.
  • the functional relationship of said components is similar to the functional relationship of the components of the electromagnetic actuator shown in FIG. 1 according to the prior art ,
  • Anchor 09 and push pin 11 form an anchor unit.
  • the anchor unit can also be made in one piece in modifications.
  • the yoke 04 and the yoke plate 06 form a yoke unit, which is preferably preassembled.
  • the pole core 07 and the housing 08 form a pole core unit.
  • the constructional difference to the embodiment according to the prior art shown in Fig. 1 is in all subsequent figures such that the armature 09 has a central bore 18 through which the pressure pin 11 is passed and axially fixed.
  • the pressure pin 11 is in a first bearing 16, which is located in the yoke 04 and in a second bearing 17, which is provided in the pole core 07, stored.
  • a centering sleeve 19 is provided, through which a centering of the yoke unit and Polkernech and thereby a coaxial alignment of the bearings 16, 17 takes place during assembly.
  • the yoke unit with yoke 04 and yoke plate 06 and the pole core unit with Polkern 07 and housing 08 are mounted floating, aligned during assembly on the centering sleeve 19 and axially by pressing the yoke unit and the Polkernech in the centering fixed.
  • the yoke unit is fixed to a fixing point 21, the pole core unit to a fixing point 22 by press-fitting.
  • a second preferred embodiment of the invention is shown.
  • the coaxial alignment of the bearing points 16, 17 again takes place via the centering sleeve 19.
  • a fixing takes place by gluing the coil 01 into the pole core unit at a gluing point 23 and by gluing the yoke unit onto the coil 01 at a gluing point 24.
  • the yoke unit with yoke 04 and yoke plate 06 is mounted floating.
  • a fixation of the bearings 16, 17 takes place by gluing the yoke unit on the pole core unit at a splice 26.
  • the splice between yoke unit and Polkernech could lie in a modified embodiment, also within the housing 08 by the yoke plate 06 with its front side in a peripheral extension 27 of Housing is glued (Fig. 5).
  • the fixing point is a solder joint 28.
  • the pole core unit and the yoke unit are fixed by transverse force-free round flanging of the edge extension 27 via the yoke unit.
  • Fig. B) shows the detail of the fixation site.
  • FIG. 8 Another preferred embodiment is shown in FIG. 8, in which retaining lugs 29 are formed on the edge extension 27. A fixation of the pole core unit and the yoke unit takes place in this embodiment by transverse force-free folding of the retaining lugs 29 via the yoke unit.
  • Fig. B) shows the actuator in a spatial view.
  • the yoke 04 is floatingly mounted during assembly and aligned over the centering sleeve 19. Subsequently, the axial fixation by means of a yoke plate, which is designed as a lid 31.
  • the lid 31 spans the entire yoke 04 and is caulked at a fixing point 32 with the housing 08.
  • FIG. 10 Another possibility of assembly is the floating mounting of the pole core 07 during assembly, as shown in Fig. 10.
  • Figure b) shows the detail of the fixation site.
  • the yoke unit is connected to the housing 08, for example by caulking.
  • the pole core 07 is mounted floating in a clearance 33 and is glued after alignment either in the clearance fit 33 or glued or soldered to a fixing point 34.

Abstract

The invention relates to an electromagnetic actuating unit for a hydraulic directional control valve and to a method for the assembly thereof. The actuating unit comprises a coil (01) for generating a magnetic field; a yoke unit having a yoke (04) and a yoke plate (06, 31), and a pole core unit having a pole core (07) and a housing (08) for conducting a magnetic flux; and an armature unit which is arranged in the magnetic field of the coil (01) and has an armature (09) and a pressure pin (11) as an actuator. The armature unit can be displaced in the direction of the longitudinal axis thereof in a first bearing point (16) in the yoke unit and in a second bearing point (17) in the pole core unit. According to the invention, at least one of the bearing points (16, 17) can be displaced in the radial direction during assembly of the actuating unit and can be fixed after a coaxial orientation of both bearing points.

Description

Bezeichnung der Erfindung Name of the invention
Elektromagnetische Stelleinheit für ein hydraulisches Wegeventil und Verfahren zu dessen MontageElectromagnetic actuator for a hydraulic directional control valve and method for its assembly
Beschreibungdescription
Gebiet der ErfindungField of the invention
Die Erfindung betrifft eine elektromagnetische Stelleinheit für ein hydraulisches Wegeventil gemäß dem Oberbegriff des Anspruchs 1 und ein Verfahren zu dessen Montage.The invention relates to an electromagnetic actuator for a hydraulic directional control valve according to the preamble of claim 1 and a method for its assembly.
Derartige Wegeventile werden beispielsweise in Brennkraftmaschinen zur Ansteuerung von hydraulischen Nockenwellenverstellern verwendet.Such directional control valves are used for example in internal combustion engines for controlling hydraulic camshaft adjusters.
Aus der DE 103 00 974 A1 ist ein Proportionalmagnetventil einer Nockenwel- lenverstelleinrichtung für Kraftfahrzeuge bekannt. Das Proportionalmagnetven- til weist ein Ventilgehäuse auf, in welchem ein Kolben verschiebbar ist und welches über mehrere Anschlüsse verfügt, über die ein Hydrauliköl zuführbar ist. Das Proportionalmagnetventil umfasst weiterhin einen Elektromagnetteil, mit welchem sich über einen Stößel der Kolben verstellen lässt. Der Stößel wird in einer Axialbohrung in einem Gehäuse des Elektromagnetteiles gelagert, wodurch er axial verschiebbar ist.From DE 103 00 974 A1 a proportional solenoid valve of a camshaft lenverstelleinrichtung for motor vehicles is known. The proportional solenoid valve has a valve housing in which a piston is displaceable and which has a plurality of connections, via which a hydraulic oil can be supplied. The proportional solenoid valve further comprises a solenoid part, with which can be adjusted via a plunger of the piston. The plunger is mounted in an axial bore in a housing of the solenoid part, whereby it is axially displaceable.
Die DE 102 11 467 A1 zeigt einen Nockenwellenversteller mit einem Elektromagneten, der als drückender Proportionalmagnet ausgeführt ist. Der Proportionalmagnet weist einen Magnetanker auf, der fest auf einem Ankerstößel sitzt, der durch einen Polkern hindurchgeführt ist und mit einer freien Stirnfläche an einem Steuerkolben oder an einem mit diesem fest verbundenen Teil anliegt. Die DE 101 53 019 A1 zeigt einen Elektromagneten, der insbesondere als Pro- portionalmagnet zur Betätigung eines hydraulischen Ventils geeignet ist. Der Elektromagnet umfasst einen hohlzylindrischen Spulenkörper, der von einem oberen Polschuh und einem unteren Polschuh begrenzt wird. Der Elektromag- net wird von einem Magnetgehäuse umschlossen. Der Spulenkörper wirkt magnetisch auf einen Magnetanker, der die Magnetkraft über eine Stößelstange zur Betätigung des hydraulischen Ventils weiterleitet. Die Stößelstange wird in einer Axialbohrung im unteren Polschuh gelagert, wodurch sie axial verschiebbar ist.DE 102 11 467 A1 shows a camshaft adjuster with an electromagnet, which is designed as a pushing proportional solenoid. The proportional magnet has a magnet armature which sits firmly on an armature tappet, which is guided through a pole core and rests with a free end face on a control piston or on a fixedly connected to this part. DE 101 53 019 A1 shows an electromagnet, which is particularly suitable as a proportional magnet for actuating a hydraulic valve. The electromagnet comprises a hollow cylindrical bobbin, which is bounded by an upper pole piece and a lower pole piece. The electric motor is enclosed by a magnet housing. The bobbin magnetically acts on a magnetic armature, which forwards the magnetic force via a push rod for actuating the hydraulic valve. The push rod is mounted in an axial bore in the lower pole piece, whereby it is axially displaceable.
Die DE 10 2004 057 873 A1 betrifft ein Sitzventil mit einem Leitungssystem zum Hindurchleiten eines zufließenden Mediums. Das Sitzventil weist einen Sitz und ein verstellbares Schließelement im Leitungssystem auf. Das verstellbare Schließelement wird mithilfe einer elektromagnetischen Stelleinrichtung betätigt. Die elektromagnetische Stelleinrichtung umfasst ein Ankergehäuse, in welchem ein Anker in Richtung einer Spulenachse verstellbar angeordnet ist. Der Anker ist mit einem Stellelement verbunden, welches das Schließelement betätigt. Das Stellelement wird in einer axialen Bohrung im Gehäuse der elektromagnetischen Stelleinrichtung gelagert, wodurch es axial verschiebbar ist.DE 10 2004 057 873 A1 relates to a seat valve with a line system for passing an inflowing medium. The seat valve has a seat and an adjustable closing element in the piping system. The adjustable closure element is actuated by means of an electromagnetic actuator. The electromagnetic setting device comprises an armature housing, in which an armature is arranged adjustable in the direction of a coil axis. The armature is connected to an actuating element which actuates the closing element. The actuator is mounted in an axial bore in the housing of the electromagnetic actuator, whereby it is axially displaceable.
Die DE 10 2005 048 732 A1 betrifft eine elektromagnetische Stelleinheit eines hydraulischen Wegeventils. Die elektromagnetische Stelleinheit umfasst einen Anker, der innerhalb eines Ankerraums axial verschiebbar angeordnet ist, und einen Polkern, der in einer Aufnahme angeordnet ist und den Ankerraum in einer Bewegungsrichtung des Ankers begrenzt. Weiterhin umfasst die elektromagnetische Stelleinheit eine Spule, die bevorzugt mit einem nicht magneti- sierbaren Material umspritzt ist, sodass ein Spulenkörper ausgebildet ist. Der Anker wird in einer Gleithülse gelagert, wodurch er reibungsarm axial verschiebbar ist.DE 10 2005 048 732 A1 relates to an electromagnetic actuating unit of a hydraulic directional control valve. The electromagnetic actuator comprises an armature, which is arranged axially displaceably within an armature space, and a pole core, which is arranged in a receptacle and limits the armature space in a direction of movement of the armature. Furthermore, the electromagnetic actuator comprises a coil, which is preferably encapsulated with a non-magnetizable material, so that a bobbin is formed. The anchor is mounted in a sliding sleeve, whereby it is axially displaceable friction.
Die JP 2005-188630 A zeigt ein hydraulisches Wegeventil mit einer elektromagnetischen Stelleinheit. Die elektromagnetische Stelleinheit umfasst eine Spule zur Erzeugung eines magnetischen Feldes, welches auf einen axial ver- schiebbaren Anker einwirkt. Der Anker umfasst ein Stellelement, welches das hydraulische Wegeventil betätigt. Das Stellelement wird in einer axialen Bohrung im Gehäuse der elektromagnetischen Stelleinrichtung gelagert, wodurch es axial verschiebbar ist.JP 2005-188630 A shows a hydraulic directional valve with an electromagnetic actuator. The electromagnetic actuator comprises a coil for generating a magnetic field which is applied to an axially slidable anchor acts. The armature comprises an actuating element which actuates the hydraulic directional control valve. The actuator is mounted in an axial bore in the housing of the electromagnetic actuator, whereby it is axially displaceable.
Fig. 1 zeigt eine weitere elektromagnetische Stelleinheit gemäß dem Stand der Technik in einer Längsschnittsdarstellung. Diese elektromagnetische Stelleinheit ist für das Stellen eines als Zentralventil ausgebildeten hydraulischen We- geventiles ausgeführt, welches radial innerhalb eines Innenrotors einer Vor- richtung zur variablen Einstellung der Steuerzeiten einer Brennkraftmaschine angeordnet ist. Die elektromagnetische Stelleinheit umfasst zunächst eine Spule 01 , die über einen Steckkontakt 02 elektrisch gespeist wird. Die Spule 01 ist innerhalb eines Spulenkörpers 03 angeordnet, der durch ein Umsphtzen der Spule 01 mit einem Kunststoff gefertigt wird. Das mit der Spule 01 erzeugbare magnetische Feld wird über einen Weicheisenkreis, der aus einem Joch 04, einer Jochplatte 06, einem Polkern 07 und einem Gehäuse 08 besteht, auf einen axial beweglich gelagerten Magnetanker 09 übertragen. Das magnetische Feld übt über einen Luftspalt zwischen dem Polkern 07 und dem Magnetanker 09 eine magnetische Kraft auf den Magnetanker 09 aus. Diese magnetische Kraft wird über einen Druckstift 11 des Magnetankers 09 auf einen Kolben des Zentralventils (nicht gezeigt) übertragen. Die elektromagnetische Stelleinheit wird über einen Flansch 12 des Gehäuses 08 am Zentralventil oder an einem das Zentralventil umgebenden Gehäuse befestigt. Das mit der Spule 01 erzeugbare magnetische Feld wirkt nicht vollständig in die Verschieberichtung des Magnetankers 09, was durch eine Exzentrizität des Magnetankers 09 bedingt ist. Diese Exzentrizität ist zum einen durch ein Spiel des Magnetankers 09 und des Druckstiftes 11 in deren Lagerung bedingt. Zum anderen ist die Exzentrizität eine Folge einer Abweichung von der Koaxialität zwischen einem Ankerlager 13 und einem Polkernlager 14. Diese Abweichung kann abhängig vom Montagekonzept und von den Toleranzen der Komponenten der elektromagnetischen Stelleinheit recht groß sein. Aufgrund der Exzentrizität des Magnetankers 09 wirken Teile des mit der Spule 01 erzeugbaren magnetischen Feldes seitlich auf den Magnetanker 09, wodurch seitlich auf den Magnetanker 09 einwirkende Kräfte erzeugt werden. Diese seitlich wirkenden Kräfte sind proportional zur Exzentrizität des Magnetankers 09 oder sogar proportional zum Quadrat der Exzentrizität des Magnetankers 09. Die aus der Abweichung der Koaxialität zwischen dem Ankerlager 13 und dem Polkernlager 14 resultie- renden Fluchtungsfehler führen zu einem Verkippen des Magnetankers 09 in dessen Ankerlager 13. Infolge dieser Verkippung gleitet der Druckstift 11 nicht mehr auf der gesamten Lagerfläche des Polkernlagers 14, insbesondere kann es dazu kommen, dass der Druckstift 11 lediglich auf den Kanten des Polkernlagers 14 gelagert wird. Dies führt zu einer eingeschränkten Funktion der elekt- romagnetischen Stelleinheit und zu einem erhöhten Verschleiß des Druckstiftes 11 und des Polkernlagers 14. Im Weiteren führt der erhöhte Verschleiß zu einer zunehmenden Exzentrizität des Magnetankers 09, wodurch sich die seitlich auf den Magnetanker 09 einwirkenden Kräfte nochmals erhöhen. In der Folge zeigt der Verschleiß einen progressiven Verlauf. Schließlich kommt es zum Ausfall der Vorrichtung zur variablen Einstellung der Steuerzeiten der Brennkraftmaschine, insbesondere dadurch, dass die Einstellungen der Steuerzeiten der Brennkraftmaschine nicht mehr innerhalb der dafür zulässigen Verstellzeiten erfolgen kann.Fig. 1 shows a further electromagnetic actuator unit according to the prior art in a longitudinal sectional view. This electromagnetic actuating unit is designed for the provision of a hydraulic directional control valve designed as a central valve, which is arranged radially inside an inner rotor of a device for variably setting the control times of an internal combustion engine. The electromagnetic actuator initially comprises a coil 01, which is electrically powered via a plug contact 02. The coil 01 is disposed within a bobbin 03, which is made by a Umsphtzen the coil 01 with a plastic. The magnetic field which can be generated by the coil 01 is transmitted via a soft iron circle, which consists of a yoke 04, a yoke plate 06, a pole core 07 and a housing 08, to an axially mounted magnet armature 09. The magnetic field exerts a magnetic force on the magnet armature 09 via an air gap between the pole core 07 and the magnet armature 09. This magnetic force is transmitted via a pressure pin 11 of the magnet armature 09 to a piston of the central valve (not shown). The electromagnetic actuator is attached via a flange 12 of the housing 08 to the central valve or to a housing surrounding the central valve. The magnetic field which can be generated by the coil 01 does not act completely in the displacement direction of the magnet armature 09, which is caused by an eccentricity of the magnet armature 09. This eccentricity is due on the one hand by a game of magnet armature 09 and the pressure pin 11 in the storage. On the other hand, the eccentricity is a consequence of a deviation from the coaxiality between an armature bearing 13 and a pole core bearing 14. This deviation may be quite large depending on the assembly concept and the tolerances of the components of the electromagnetic actuator. Due to the eccentricity of the magnet armature 09, parts of the magnetic field which can be generated by the coil 01 act laterally on the magnet armature 09, whereby the magnet armature is laterally exposed 09 acting forces are generated. These laterally acting forces are proportional to the eccentricity of the magnet armature 09 or even proportional to the square of the eccentricity of the magnet armature 09. The alignment errors resulting from the deviation of the coaxiality between the armature bearing 13 and the pole core bearing 14 lead to a tilting of the armature 09 in its armature bearing 13. As a result of this tilting of the pressure pin 11 no longer slides on the entire bearing surface of the Polkernlagers 14, in particular it may happen that the pressure pin 11 is supported only on the edges of the Polkernlagers 14. This leads to a limited function of the electromagnetic actuator and to increased wear of the pressure pin 11 and the pole core bearing 14. Furthermore, the increased wear leads to an increasing eccentricity of the magnet armature 09, whereby the forces acting laterally on the magnet armature 09 increase again , As a result, the wear shows a progressive course. Finally, there is the failure of the device for variable adjustment of the timing of the internal combustion engine, in particular by the fact that the settings of the timing of the engine can not be done within the allowable adjustment times.
Die Aufgabe der vorliegenden Erfindung besteht ausgehend von der in Fig. 1 gezeigten elektromagnetischen Stelleinheit darin, eine verbesserte elektromagnetische Stelleinheit bereitzustellen, die aufgrund größerer möglicher Toleranzen der Einzelbauteile einerseits besonders kostengünstig herstellbar ist, andererseits durch eine gute Konzentrizität der Lagerstellen eine hohe Lebensdauer hat.The object of the present invention, starting from the electromagnetic actuator shown in Fig. 1 is to provide an improved electromagnetic actuator, which is due to greater possible tolerances of the individual components on the one hand particularly inexpensive to produce, on the other hand has a good durability by good concentricity of the bearings.
Die Aufgabe wird durch eine elektromagnetische Stelleinheit mit den Merkmalen des Anspruchs 1 und durch ein Verfahren zu deren Montage mit den Merkmalen des Verfahrensanspruchs 8 gelöst.The object is achieved by an electromagnetic actuator with the features of claim 1 and by a method for their assembly with the features of the method claim 8.
Die erfindungsgemäße elektromagnetische Stelleinheit dient der Verstellung eines hydraulischen Wegeventils, beispielsweise zur variablen Einstellung der Steuerzeiten einer Brennkraftmaschine. Die elektromagnetische Stelleinheit umfasst zunächst in bekannter Weise eine Spule, mit welcher ein magnetisches Feld erzeugt werden kann. Die Stelleinheit umfasst weiterhin eine Ankereinheit mit einem Anker und einem Druckstift. Der Druckstift bildet einen Aktuator der elektromagnetischen Stelleinheit. Mit Hilfe des Druckstiftes kann auf das hydraulische Wegeventil eingewirkt werden, um dieses zu verstellen. Hierfür ist die Ankereinheit entlang ihrer Achse verschiebbar in zwei Lagerstellen gelagert.The electromagnetic actuator according to the invention serves to adjust a hydraulic directional control valve, for example for the variable adjustment of the timing of an internal combustion engine. The electromagnetic actuator comprises first in a known manner a coil with which a magnetic field can be generated. The actuating unit further comprises an anchor unit with an armature and a pressure pin. The pressure pin forms an actuator of the electromagnetic actuator. With the help of the pressure pin can be acted on the hydraulic directional control valve to adjust this. For this purpose, the armature unit is slidably mounted in two bearings along its axis.
Diese Achse ist üblicherweise durch eine Symmetrieachse der Ankereinheit gebildet, die bei einer typischen idealen Konstruktion von elektromagnetischen Stelleinheiten mit der Symmetrieachse des Ankers und/oder der Spule identisch ist. Um den Druckstift axial zu verschieben, wirkt der Anker auf den Druckstift ein, welcher die axiale Verschiebebewegung vorgibt. Der Anker und der Druckstift führen die axiale Verschiebebewegung gemeinsam aus. Der An- ker befindet sich im magnetischen Feld der Spule, wodurch eine Magnetkraft auf ihn einwirkt, welche die Verschiebebewegung verursacht. Der Druckstift folgt der axialen Verschiebebewegung des Ankers aufgrund der festen Verbindung mit diesem.This axis is usually formed by an axis of symmetry of the armature unit, which in a typical ideal construction of electromagnetic actuators is identical to the axis of symmetry of the armature and / or the coil. To move the pressure pin axially, the anchor acts on the pressure pin, which dictates the axial displacement movement. The armature and the pressure pin execute the axial displacement movement together. The armature is located in the magnetic field of the coil, whereby a magnetic force acts on it, which causes the displacement movement. The pressure pin follows the axial displacement movement of the armature due to the fixed connection with this.
Die Ankereinheit ist in zwei Lagerstellen gelagert. Dabei ist eine erste Lagerstelle in einer Jocheinheit vorgesehen, in welcher der Anker axial verschiebbar gelagert ist. Eine zweite, in einer Polkerneinheit vorgesehene Lagerstelle dient als Lagerung für den mit dem Anker fest verbundenen Druckstift. Durch diese zweite Lagerstelle ist der Druckstift hindurchgeführt. Die Lagerung ermöglicht eine axiale Verschiebebewegung des Druckstiftes, d. h. eine Bewegung in Richtung seiner Längsachse.The anchor unit is stored in two storage locations. In this case, a first bearing point is provided in a yoke unit, in which the armature is mounted axially displaceable. A second, provided in a Polkerneinheit storage serves as storage for the firmly connected to the anchor pressure pin. Through this second bearing point of the pressure pin is passed. The storage allows axial displacement movement of the pressure pin, d. H. a movement in the direction of its longitudinal axis.
In einer anderen Ausführungsform ist der Druckstift in beiden Lagerstellen gelagert und durch eine Zentralbohrung des Ankers hindurchgeführt und in dieser fixiert, so dass der Anker fest auf dem Druckstift gelagert ist. Bei dieser Ausführungsform lässt sich das erfindungsgemäße Verfahren besonders vorteilhaft anwenden, weil der Druckstift selbst die Längsachse der Ankereinheit bildet und zumindest der Anker als toleranzbehaftetes Teil nicht zur Lagerung beiträgt.In another embodiment, the pressure pin is mounted in both bearings and passed through a central bore of the armature and fixed in this, so that the armature is mounted firmly on the pressure pin. In this embodiment, the method according to the invention can be used particularly advantageously, because the pressure pin itself forms the longitudinal axis of the anchor unit and at least the anchor does not contribute to the storage as a tolerance-related part.
Erfindungsgemäß ist mindestens eine der beiden Lagerstellen während der Montage radial freigestellt, also "schwimmend". Während der Montage erfolgt die koaxiale Ausrichtung der beiden Lagerstellen zueinander und anschließend eine Fixierung der freigestellten Lagerstelle. Die Fixierung kann beispielsweise durch Kleben, Löten, Schweißen, Verprägen, Bördeln oder Klemmen erfolgen.According to the invention, at least one of the two bearing points is radially exposed during assembly, ie "floating". During assembly, the coaxial alignment of the two bearing points to each other and then fixation of the exempted bearing point. The fixation can be done for example by gluing, soldering, welding, embossing, flanging or clamping.
Die Ausrichtung der Lagerstellen wird in einer bevorzugten Ausführungsform der Erfindung durch eine Zentrierhülse realisiert, die als Zentrierhilfe in die Spule eingebracht wird und in welcher die Lagerstellen koaxial mit der Längsachse der Ankereinheit ausgerichtet werden. Es ist aber ebenso möglich, die Ausrichtung der Lagerstellen über eine Montagevorrichtung zu realisieren, wel- che die Ausrichtung übernimmt.The orientation of the bearings is realized in a preferred embodiment of the invention by a centering, which is introduced as a centering aid in the coil and in which the bearings are aligned coaxially with the longitudinal axis of the anchor unit. However, it is also possible to realize the alignment of the bearing points via a mounting device, which takes over the alignment.
Die Spule ist bevorzugt innerhalb eines Spulenkörpers angeordnet und weist eine hohlzylindrische Grundform auf. Der Anker, eine Jocheinheit mit Joch und Deckel, und eine Polkerneinheit mit einem Polkern und einem Magnetgehäuse sind bevorzugt im Hohlraum der hohlzylindrischen Grundform des Spulenkörpers angeordnet. Hierdurch ist eine effiziente Funktion, kompakte Bauweise und kostengünstige Montage der elektromagnetischen Stelleinheit gewährleistet. Hierbei sind der Anker, das Joch und der Polkern rotationssymmetrisch ausgeführt, wobei die Rotationsachsen der hohlzylindrischen Grundform des Spulenkörpers, des Ankers, des Jochs und des Polkernes zusammenfallen. Diese Rotationsachsen bilden die Achse der elektromagnetischen Stelleinheit, in welcher sich der Anker mit dem Druckstift translatorisch bewegt.The coil is preferably arranged within a bobbin and has a hollow cylindrical basic shape. The armature, a yoke unit with yoke and cover, and a pole core unit with a pole core and a magnet housing are preferably arranged in the hollow hollow cylindrical basic shape of the bobbin. As a result, an efficient function, compact design and cost-effective installation of the electromagnetic actuator is guaranteed. Here, the armature, the yoke and the pole core are rotationally symmetrical, wherein the axes of rotation of the hollow cylindrical basic shape of the bobbin, the armature, the yoke and the pole core coincide. These axes of rotation form the axis of the electromagnetic actuator, in which the armature moves translationally with the pressure pin.
Der Spulenkörper wird bevorzugt mit seiner Mantelfläche und einer Grundflä- che formschlüssig vom Gehäuse aufgenommen. Hierdurch ist eine sichere Montage des Spulenkörpers gegenüber dem hydraulischen Wegeventil gewährleistet, sodass große Kräfte zur Verstellung des hydraulischen Wegeventils übertragbar sind. Die erfindungsgemäße elektromagnetische Stelleinheit ist besonders für das Stellen eines als Zentralventil ausgebildeten hydraulischen Wegeventils geeignet. Das Zentralventil ist radial innerhalb eines Innenrotors einer Vorrichtung zur variablen Einstellung der Steuerzeiten einer Brennkraftmaschine angeordnet. Derartige Stelleinheiten werden auch als Zentralmagnet bezeichnet. Die erfindungsgemäße elektromagnetische Stelleinheit ist aber auch zum Verstellen anderer hydraulischer Wegeventile geeignet, beispielsweise auch bei Anwendungen außerhalb von Brenn- kraftmaschinen.The bobbin is preferably received positively with its lateral surface and a base surface of the housing. As a result, a secure assembly of the bobbin is ensured with respect to the hydraulic directional control valve, so that large forces for the adjustment of the hydraulic directional control valve are transferable. The electromagnetic actuator according to the invention is particularly suitable for providing a designed as a central valve hydraulic directional control valve. The central valve is arranged radially inside an inner rotor of a device for variably setting the control times of an internal combustion engine. Such actuators are also referred to as central magnet. However, the electromagnetic actuator according to the invention is also suitable for adjusting other hydraulic directional valves, for example, in applications outside of internal combustion engines.
Weitere Vorteile, Einzelheiten und Weiterbildungen der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsformen, unter Bezugnahme auf die Zeichnung.Further advantages, details and developments of the present invention will become apparent from the following description of preferred embodiments, with reference to the drawings.
Es zeigen:Show it:
Fig. 1 : eine elektromagnetische Stelleinheit für ein hydraulisches Wegeventil gemäß dem Stand der Technik;Fig. 1: an electromagnetic actuator for a hydraulic directional control valve according to the prior art;
Fig. 2: eine erste Ausführungsform der Erfindung mit verpressten Komponenten;2 shows a first embodiment of the invention with compressed components;
Fig. 3: eine zweite Ausführungsform der Erfindung mit zwei Klebestellen;3 shows a second embodiment of the invention with two splices;
Fig. 4: eine dritte Ausführungsform der Erfindung mit verklebten Komponenten;4 shows a third embodiment of the invention with bonded components;
Fig. 5: eine vierte Ausführungsform der Erfindung mit einer Klebestelle zwischen Jocheinheit und Polkerneinheit;5 shows a fourth embodiment of the invention with a splice between the yoke unit and the pole core unit;
Fig. 6: eine fünfte Ausführungsform der Erfindung mit einer Lötstelle zwischen Jocheinheit und Polkerneinheit; Fig. 7: zwei Abbildungen einer sechsten Ausführungsform der Erfindung mit einer Bördelstelle zwischen Jocheinheit und Polkerneinheit;6 shows a fifth embodiment of the invention with a solder joint between yoke unit and pole core unit; 7 shows two illustrations of a sixth embodiment of the invention with a crimping point between the yoke unit and the pole core unit;
Fig. 8: zwei Abbildungen einer siebten Ausführungsform der Erfindung mit Haltenasen;Fig. 8: two illustrations of a seventh embodiment of the invention with retaining lugs;
Fig. 9: eine achte Ausführungsform der Erfindung mit verpressten Komponenten;9 shows an eighth embodiment of the invention with compressed components;
Fig. 10: zwei Abbildungen einer neunten Ausführungsform der Erfindung mit einer Klebestelle zwischen Polkern und Gehäuse.Fig. 10: two illustrations of a ninth embodiment of the invention with a splice between pole core and housing.
Fig. 1 zeigt eine elektromagnetische Stelleinheit für ein hydraulisches Wegeventil zur variablen Einstellung der Steuerzeiten einer Brennkraftmaschine, wie sie aus dem Stand der Technik bekannt ist und bereits in der Beschreibungseinleitung erläutert wurde.1 shows an electromagnetic setting unit for a hydraulic directional valve for variably setting the control times of an internal combustion engine, as is known from the prior art and has already been explained in the introduction to the description.
Die mehreren Ausführungsformen der erfindungsgemäßen elektromagnetischen Stelleinheit, die in den Fig. 2 bis 11 beschrieben werden, besitzen zu- nächst (ebenso wie die in Fig. 1 gezeigte Stelleinheit gemäß dem Stand der Technik) eine Spule 01 , einen Steckkontakt 02, einen Spulenkörper 03, ein Joch 04, eine Jochplatte 06, einen Polkern 07, ein Gehäuse 08, einen Magnetanker 09 und einen Druckstift 11. Der funktionelle Zusammenhang der genannten Komponenten gleicht dem funktionellen Zusammenhang der Komponenten der in Fig. 1 gezeigten elektromagnetischen Stelleinheit gemäß dem Stand der Technik.The several embodiments of the electromagnetic actuator according to the invention, which are described in FIGS. 2 to 11, initially (as well as the setting unit shown in FIG. 1 according to the prior art) have a coil 01, a plug contact 02, a bobbin 03rd , a yoke 04, a yoke plate 06, a pole core 07, a housing 08, a magnet armature 09 and a pressure pin 11. The functional relationship of said components is similar to the functional relationship of the components of the electromagnetic actuator shown in FIG. 1 according to the prior art ,
Anker 09 und Druckstift 11 bilden eine Ankereinheit. Die Ankereinheit kann in Abwandlungen auch einstückig ausgeführt sein. Das Joch 04 und die Jochplat- te 06 bilden eine Jocheinheit, welche vorzugsweise vormontiert ist. Der Polkern 07 und das Gehäuse 08 bilden eine Polkerneinheit. Der bauliche Unterschied zu der in Fig. 1 dargestellten Ausführungsform gemäß dem Stand der Technik ist in allen nachfolgenden Figuren derart, dass der Anker 09 eine Zentralbohrung 18 aufweist, durch die der Druckstift 11 hindurchgeführt und axial fixiert ist. Der Druckstift 11 ist in einer ersten Lagerstelle 16, welche sich im Joch 04 befindet und in einer zweiten Lagerstelle 17, welche im Polkern 07 vorgesehen ist, gelagert. Innerhalb der Spule 08 ist eine Zentrierhülse 19 vorgesehen, durch welche bei der Montage eine Zentrierung von Jocheinheit und Polkerneinheit und dadurch eine koaxiale Ausrichtung der Lagerstellen 16, 17 erfolgt.Anchor 09 and push pin 11 form an anchor unit. The anchor unit can also be made in one piece in modifications. The yoke 04 and the yoke plate 06 form a yoke unit, which is preferably preassembled. The pole core 07 and the housing 08 form a pole core unit. The constructional difference to the embodiment according to the prior art shown in Fig. 1 is in all subsequent figures such that the armature 09 has a central bore 18 through which the pressure pin 11 is passed and axially fixed. The pressure pin 11 is in a first bearing 16, which is located in the yoke 04 and in a second bearing 17, which is provided in the pole core 07, stored. Within the coil 08, a centering sleeve 19 is provided, through which a centering of the yoke unit and Polkerneinheit and thereby a coaxial alignment of the bearings 16, 17 takes place during assembly.
In der in Fig. 2 dargestellten Ausführungsform werden die Jocheinheit mit Joch 04 und Jochplatte 06 sowie die Polkerneinheit mit Polkern 07 und Gehäuse 08 schwimmend gelagert montiert, bei der Montage über die Zentrierhülse 19 ausgerichtet und durch Einpressen der Jocheinheit und der Polkerneinheit in die Zentrierhülse axial fixiert. Die Jocheinheit ist an einer Fixierstelle 21 , die Polkerneinheit an einer Fixierstelle 22 durch Presssitz fixiert.In the embodiment shown in Fig. 2, the yoke unit with yoke 04 and yoke plate 06 and the pole core unit with Polkern 07 and housing 08 are mounted floating, aligned during assembly on the centering sleeve 19 and axially by pressing the yoke unit and the Polkerneinheit in the centering fixed. The yoke unit is fixed to a fixing point 21, the pole core unit to a fixing point 22 by press-fitting.
In Fig. 3 ist eine zweite bevorzugte Ausführungsform der Erfindung gezeigt. Die koaxiale Ausrichtung der Lagerstellen 16, 17 erfolgt wiederum über die Zent- rierhülse 19. Anschließend erfolgt eine Fixierung durch Kleben der Spule 01 in die Polkerneinheit an einer Klebestelle 23 und durch Kleben der Jocheinheit auf die Spule 01 an einer Klebestelle 24.In Fig. 3, a second preferred embodiment of the invention is shown. The coaxial alignment of the bearing points 16, 17 again takes place via the centering sleeve 19. Subsequently, a fixing takes place by gluing the coil 01 into the pole core unit at a gluing point 23 and by gluing the yoke unit onto the coil 01 at a gluing point 24.
Bei der in Fig. 4 dargestellten Ausführungsform wird die Jocheinheit mit Joch 04 und Jochplatte 06 schwimmend gelagert montiert. Eine Fixierung der Lagerstellen 16, 17 erfolgt durch Kleben der Jocheinheit auf die Polkerneinheit an einer Klebestelle 26. Die Klebestelle zwischen Jocheinheit und Polkerneinheit könnte in einer abgewandelten Ausführungsform auch innerhalb des Gehäuses 08 liegen, indem die Jochplatte 06 mit ihrer Stirnseite in einen Randfortsatz 27 des Gehäuses eingeklebt wird (Fig. 5).In the embodiment shown in Fig. 4, the yoke unit with yoke 04 and yoke plate 06 is mounted floating. A fixation of the bearings 16, 17 takes place by gluing the yoke unit on the pole core unit at a splice 26. The splice between yoke unit and Polkerneinheit could lie in a modified embodiment, also within the housing 08 by the yoke plate 06 with its front side in a peripheral extension 27 of Housing is glued (Fig. 5).
In der in Fig. 6 dargestellten Ausführungsform ist abweichend zu der in Fig. 4 beschriebenen Bauform die Fixierstelle eine Lötstelle 28. Gemäß der Darstellung in Fig. 7 erfolgt die Fixierung der Polkerneinheit und der Jocheinheit durch querkraftfreies Rundbördeln des Randfortsatzes 27 über die Jocheinheit. Abb. b) zeigt das Detail der Fixierstelle.In the embodiment shown in FIG. 6, in contrast to the design described in FIG. 4, the fixing point is a solder joint 28. According to the illustration in FIG. 7, the pole core unit and the yoke unit are fixed by transverse force-free round flanging of the edge extension 27 via the yoke unit. Fig. B) shows the detail of the fixation site.
Eine andere bevorzugte Ausführungsform zeigt Fig. 8, bei der am Randfortsatz 27 Haltenasen 29 ausgebildet sind. Eine Fixierung der Polkerneinheit und der Jocheinheit erfolgt bei dieser Ausführungsform durch querkraftfreies Umlegen der Haltenasen 29 über die Jocheinheit. Abb. b) zeigt die Stelleinheit in räumli- eher Ansicht.Another preferred embodiment is shown in FIG. 8, in which retaining lugs 29 are formed on the edge extension 27. A fixation of the pole core unit and the yoke unit takes place in this embodiment by transverse force-free folding of the retaining lugs 29 via the yoke unit. Fig. B) shows the actuator in a spatial view.
Bei der in Fig. 9 dargestellten Ausführungsform wird bei der Montage das Joch 04 schwimmend gelagert und über die Zentrierhülse 19 ausgerichtet. Anschließend erfolgt die axiale Fixierung mittels einer Jochplatte, welche als Deckel 31 ausgeführt ist. Der Deckel 31 überspannt das gesamte Joch 04 und wird an einer Fixierstelle 32 mit dem Gehäuse 08 verstemmt.In the embodiment shown in Fig. 9, the yoke 04 is floatingly mounted during assembly and aligned over the centering sleeve 19. Subsequently, the axial fixation by means of a yoke plate, which is designed as a lid 31. The lid 31 spans the entire yoke 04 and is caulked at a fixing point 32 with the housing 08.
Eine weitere Möglichkeit der Montage ist die schwimmende Lagerung des Polkerns 07 bei der Montage, wie dies in Fig. 10 gezeigt ist. In der Abbildung b) ist das Detail der Fixierstelle gezeigt. Bei diesen Ausführungsformen ist die Jocheinheit mit dem Gehäuse 08 verbunden, z.B. durch verstemmen. Der Polkern 07 ist in einer Spielpassung 33 schwimmend gelagert und wird nach dem Ausrichten entweder in der Spielpassung 33 verklebt oder an einer Fixierstelle 34 geklebt oder gelötet. Another possibility of assembly is the floating mounting of the pole core 07 during assembly, as shown in Fig. 10. Figure b) shows the detail of the fixation site. In these embodiments, the yoke unit is connected to the housing 08, for example by caulking. The pole core 07 is mounted floating in a clearance 33 and is glued after alignment either in the clearance fit 33 or glued or soldered to a fixing point 34.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
01 Spule01 coil
02 Steckkontakt02 plug contact
03 Spulenkörper03 bobbin
04 Joch04 yoke
05 —05 -
06 Jochplatte06 yoke plate
07 Pol kern07 pole core
08 Gehäuse08 housing
09 Magnetanker09 magnet armature
10 —10 -
11 Druckstift11 push pin
12 Flansch12 flange
13 Ankerlager13 anchor bearings
14 Polkernlager14 pole core bearings
15 —15 -
16 Lagerstelle, erste16 storage place, first
17 Lagerstelle, zweite17 storage place, second
18 Zentralbohrung18 central drilling
19 Zentrierhülse19 centering sleeve
20 —20 -
21 Fixierstelle21 fixation site
22 Fixierstelle22 fixation site
23 Klebestelle23 splice
24 Klebstelle24 adhesive point
25 —25 -
26 Klebestelle26 splice
27 Randfortsatz27 marginal extension
28 Lötstelle28 solder joint
29 Haltenase29 holding nose
30 —30 -
31 Deckel31 lids
32 Fixierstelle32 fixation site
33 Spielpassung33 clearance
34 Fixierstelle 34 fixation site

Claims

Patentansprüche claims
1. Elektromagnetische Stelleinheit für ein hydraulisches Wegeventil, um- fassend: eine Spule (01 ) zur Erzeugung eines Magnetfeldes; eine Jocheinheit mit einem Joch (04) und einer Jochplatte (06, 31 ) sowie eine Polkerneinheit mit einem Polkern (07) und einem Gehäuse (08) zur Leitung eines magnetischen Flusses; - eine im Magnetfeld der Spule (01 ) angeordnete Ankereinheit mit einem Anker (09) und einem Druckstift (11 ) als Aktuator, wobei die Ankereinheit in Richtung ihrer Längsachse verschiebbar in einer ersten Lagerstelle (16) in der Jocheinheit und in einer zweiten Lagerstelle (17) in der Polkerneinheit gelagert ist; dadurch gekennzeichnet, dass mindestens eine der Lagerstellen (16,1. An electromagnetic actuator for a hydraulic directional control valve, comprising: a coil (01) for generating a magnetic field; a yoke unit having a yoke (04) and a yoke plate (06, 31) and a pole core unit having a pole core (07) and a housing (08) for conducting a magnetic flux; an armature unit arranged in the magnetic field of the coil (01) with an armature (09) and a pressure pin (11) as an actuator, the armature unit being displaceable in the direction of its longitudinal axis in a first bearing point (16) in the yoke unit and in a second bearing point ( 17) is mounted in the pole core unit; characterized in that at least one of the bearing points (16,
17) während der Montage der Stelleinheit in radialer Richtung verlagerbar und nach einer koaxialen Ausrichtung beider Lagerstellen fixierbar ist.17) during assembly of the actuator in the radial direction and displaceable according to a coaxial alignment of both bearings is fixed.
2. Stelleinheit nach Anspruch 1 , dadurch gekennzeichnet, dass in der Spule (01 ) eine Zentrierhülse (19) angeordnet ist, welche der radialen Ausrichtung der Lagerstellen (16, 17) während der Montage dient.2. Actuator according to claim 1, characterized in that in the coil (01) a centering sleeve (19) is arranged, which serves the radial alignment of the bearing points (16, 17) during assembly.
3. Stelleinheit nach Anspruch 2, dadurch gekennzeichnet, dass die Zent- rierhülse (19) der axialen und/oder radialen Positionsbestimmung der3. Actuator according to Claim 2, characterized in that the centering sleeve (19) of the axial and / or radial position determination of
Lagerstellen (16, 17) dient.Bearing points (16, 17) is used.
4. Stelleinheit nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Druckstift (11 ) an seinen beiden Enden in jeweils einer der Lagerstellen (16, 17) gelagert ist, und dass der Anker (09) eine Zentralbohrung (18) aufweist, durch die der Druckstift (11 ) hindurchgeführt und axial fixiert ist. 4. Actuator according to one of claims 1 to 3, characterized in that the pressure pin (11) is mounted at its two ends in each case one of the bearing points (16, 17), and that the armature (09) has a central bore (18) through which the pressure pin (11) is passed and axially fixed.
5. Stelleinheit nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass eine Fixierstelle zwischen der Jochplatte (06) und dem Gehäuse (08) vorgesehen ist.5. Setting unit according to one of claims 1 to 4, characterized in that a fixing point between the yoke plate (06) and the housing (08) is provided.
6. Stelleinheit nach Anspruch 5, dadurch gekennzeichnet, dass die Fixierstelle durch eine Klebstelle (26), eine Lötstelle (28), eine Schweißnaht, eine Bördelung oder durch umgelegte Haltenasen (29) gebildet ist.6. Actuator according to claim 5, characterized in that the fixing point by a bonding point (26), a solder joint (28), a weld, a flange or by folded retaining lugs (29) is formed.
7. Stelleinheit nach einem der Ansprüche 1 bis 4, dadurch gekennzeich- net, dass eine Spielpassung (33) und eine Fixierstelle (34) zwischen dem Polkern (09) und dem Gehäuse (08) vorgesehen ist, wobei die Fixierstelle (34) durch eine Klebestelle in der Spielpassung (33) oder eine Lötstelle oder eine Schweißnaht gebildet ist.7. Actuating unit according to one of claims 1 to 4, characterized marked, that a clearance fit (33) and a fixing point (34) between the pole core (09) and the housing (08) is provided, wherein the fixing point (34) a splice in the clearance (33) or a solder joint or a weld is formed.
8. Verfahren zur Montage einer elektromagnetischen Stelleinheit für ein hydraulisches Wegeventil, folgende Schritte umfassend: a. Montage einer Jocheinheit, einer Ankereinheit, einer Polkerneinheit und einer Spule (01 ) mit schwimmender Lagerung mindestens einer von zwei Lagerstellen (16, 17) in der Jocheinheit oder in der Polkerneinheit; b. koaxiale Ausrichtung der zwei Lagerstellen (16, 17) c. Fixierung der schwimmend gelagerten Lagerstelle.8. A method of assembling an electromagnetic actuator for a hydraulic directional control valve, comprising the steps of: a. Mounting a yoke unit, an anchor unit, a pole core unit and a coil (01) with floating mounting of at least one of two bearing points (16, 17) in the yoke unit or in the pole core unit; b. coaxial alignment of the two bearings (16, 17) c. Fixation of the floating bearing.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass die koaxia- Ie Ausrichtung der Lagerstellen durch Einschieben der Jocheinheit und der Polkerneinheit in eine im Inneren der Spule angeordnete Zentrierhülse (19) erfolgt.9. The method according to claim 8, characterized in that the koaxia- Ie alignment of the bearings takes place by inserting the yoke unit and the pole core unit in a arranged inside the coil centering sleeve (19).
10. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Fixierung durch Einpressen, Kleben, Löten, Schweißen, Bördeln oder10. The method according to claim 8 or 9, characterized in that the fixation by pressing, gluing, soldering, welding, flanging or
Klemmen oder eine Kombination dieser Verbindungen erfolgt. Terminals or a combination of these compounds takes place.
11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass die Fixierung durch Kleben der Spule in die Polkerneinheit und Kleben der Jocheinheit auf die Spule erfolgt.11. The method according to claim 10, characterized in that the fixing takes place by gluing the coil in the pole core unit and gluing the yoke unit on the spool.
12. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass die Fixierung durch Kleben oder Löten oder Schweißen der Jocheinheit auf die Polkerneinheit erfolgt.12. The method according to claim 10, characterized in that the fixing takes place by gluing or soldering or welding the yoke unit to the pole core unit.
13. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass die Fixie- rung durch Kleben oder Löten oder Schweißen des Polkerns auf dem13. The method according to claim 10, characterized in that the fixing tion by gluing or soldering or welding the pole core on the
Magnetgehäuse erfolgt. Magnetic housing takes place.
EP09736418.6A 2008-11-26 2009-10-19 Electromagnetic actuating unit for a hydraulic directional control valve and method for the assembly thereof Active EP2370675B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008059012A DE102008059012A1 (en) 2008-11-26 2008-11-26 Electromagnetic actuator for a hydraulic directional control valve and method for its assembly
PCT/EP2009/063646 WO2010060690A1 (en) 2008-11-26 2009-10-19 Electromagnetic actuating unit for a hydraulic directional control valve and method for the assembly thereof

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EP2370675A1 true EP2370675A1 (en) 2011-10-05
EP2370675B1 EP2370675B1 (en) 2014-12-10

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EP (1) EP2370675B1 (en)
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WO2010060690A1 (en) 2010-06-03
US20110220826A1 (en) 2011-09-15
US8350652B2 (en) 2013-01-08
EP2370675B1 (en) 2014-12-10

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