EP0278227B1 - Actuating device for a hydraulic, electrically controlled proportional valve - Google Patents
Actuating device for a hydraulic, electrically controlled proportional valve Download PDFInfo
- Publication number
- EP0278227B1 EP0278227B1 EP88100238A EP88100238A EP0278227B1 EP 0278227 B1 EP0278227 B1 EP 0278227B1 EP 88100238 A EP88100238 A EP 88100238A EP 88100238 A EP88100238 A EP 88100238A EP 0278227 B1 EP0278227 B1 EP 0278227B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- actuating device
- housing
- valve
- displacement sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1607—Armatures entering the winding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/081—Magnetic constructions
- H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material
-
- 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
- H01F2007/1684—Armature position measurement using coils
Definitions
- the invention relates to an actuator for a hydraulic, electrically controllable proportional valve according to the preamble of the main claim.
- an actuating device is already known from DE-AS 29 20 670, which has a common housing for a proportional magnet and a displacement sensor. A hollow bore is provided in the housing from one end face to the other end face, which is offset several times in such a way that its section lies with the greatest internal width on the valve-side end face.
- This actuating device has the disadvantage that all components of the permanent magnet and the displacement transducer, which are designed here in a so-called wet design, are mounted in the housing from the valve-side end.
- the pressure pipe arranged in the hollow bore is designed in a one-piece construction, individual, plugged components of the pressure pipe being sealed with the aid of O-rings.
- the for Actuating device provided electronics unit is mounted in the longitudinal direction on the end of the housing facing away from the valve. This not only leads to a relatively large axial overall length, but also to a small amount of space for arranging the electronic unit and also to relatively long cable connections due to the relatively small end face. Furthermore, means for adjusting the displacement sensor are also missing in this actuating device.
- the actuating device according to the invention for a hydraulic, electrically controllable proportional valve with the characterizing features of the main claim has the advantage that it results in a compact and easy to manufacture unit.
- the actuating device is also easy to install, since the individual components of the proportional magnet and the displacement sensor are installed in the housing from opposite end faces. Thanks to the one-piece pressure tube, the sealing problems can be easily mastered even with wet construction and the center offset of the armature of the proportional magnet to the transducer core in the displacement transducer.
- the actuating device also enables a short axial length and short cable connections to an associated electronics unit.
- FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
- the single figure shows a longitudinal section through the actuating device with an attached electronic unit.
- the actuating device 10 consists essentially of a proportional magnet 11, a displacement sensor 12 and an associated electronics unit 13.
- the proportional magnet 11 and the displacement sensor 12 are arranged in a common housing 14 made of magnetically conductive material, on the valve-side end face 15 of which is known per se Proportional valve 16, not shown, is attached.
- a continuous hollow bore 17 extends in the longitudinal direction from the valve-side end face 15 to an opposite, valve-facing, second end face 18.
- This hollow bore 17 is stepped several times and forms a first section 19 with a larger diameter, which is open towards the valve-side end face 15 essentially receives a magnetic coil 21 of the proportional magnet 11.
- the first section 19 is followed by a second section 22 with a smaller diameter, in which a pressure tube 23 of the actuating device 10 is guided and supported.
- the second section 22 in the hollow bore 17 merges into a third section 24 with a larger diameter, which is open to the second end face 18.
- the pressure pipe 23 inserted into the recessed hollow bore 17 consists of several individual parts which are put together soldered and then processed so that the pressure tube 23 results in an integral structure after its processing.
- the one-piece pressure tube 23 essentially consists of an anchor tube 25, which forms a longitudinal section with a larger diameter, and a transducer tube 26, which is firmly connected thereto, and which forms a second longitudinal section, which adjoins the first longitudinal section, and has a smaller diameter.
- an annular flange 27 is fastened, with which the pressure tube 23 is guided in the first section 19 of the housing 14.
- At the other end of the anchor tube 25 there is a reinforced inner collar 28, in which the receiver tube 26 is brazed with its open end.
- the pressure tube 23 is mounted with its first longitudinal section 25 in the second section 22 with a smaller diameter of the hollow bore 17 and protrudes somewhat into the third section 24, so that the inner collar 28 comes to lie at a distance from the second section 22 with a smaller diameter.
- the pressure tube 23 thus projects freely into the third section 24 with its pick-up tube 26.
- an armature 31 of the proportional magnet 11 is guided so that it can move longitudinally in its internal displacement 29.
- the armature 31 is rigidly connected to a transducer core 33, which is guided in the transducer tube 26, via a mechanical coupling member 32.
- the movement of the armature 31 is transmitted to the outside or to the proportional valve 16 via a lifting rod 34 which penetrates a magnetic core 35.
- a helical spring 36 supported on the inner collar 28 presses the armature 31 with little force in the direction of the end face 15 on the valve side.
- the measuring coils 37 of the displacement transducer 12 are guided to be longitudinally displaceable with the aid of an associated coil carrier 38 made of plastic.
- An anti-rotation device 39 of the coil carrier 38 in the housing 14 is achieved with a conventional pin-slot connection.
- the coil support 38 is supported by a Spring 41 on the reinforced inner collar 28 of the pressure tube 23, so that there is an air gap 42 between the measuring coils 37 and the inner collar 28 to shield disturbing lines of magnetic flux.
- the anchor tube 25 has at its closed end an external thread 43 on which an associated threaded nut 44 is seated, whereby adjustment means are provided for the longitudinal adjustment of the measuring coils 37.
- the third section 24 of the hollow bore 17 which is open towards the second end face 18 is closed to the outside by a protective cap 45. On the threaded nut 44 there is also a protective disk 46 against magnetic field interference.
- the housing 14 of the actuating device 10 is essentially square in cross section and forms a flat mounting surface 47 on its upper longitudinal side, which extends between the two end faces 15 and 18. From the first section 19 of the hollow bore 17, two recesses 48, 49 lead into this mounting surface 47, through which the connecting cables of the magnetic coil 21 are passed. Furthermore, a recess 51 leads from the third section 24 of the hollow bore 17 into the mounting surface 47, through which the electrical connection cables are guided by the displacement sensor 12. All recesses 48, 49, 51 in the mounting surface 47 are covered by a hat-shaped housing cover 52, on the inside of which the entire electronics unit 13 is attached. Only the plug connections 53 and 54 for the proportional magnet 11 and the displacement sensor 12 lead to the outside of the housing cover 52.
- the assembly of the actuating device 10 is particularly simple and time-saving.
- the pressure tube 23 and the magnet coil 21 can be installed from the valve-side end face 15, while the measuring coils 37 and the anti-rotation device 39 can then be installed from the other, second end face 18.
- the one-piece pressure tube 23 can be easily sealed off from the proportional valve 16, the displacement 29 of which is filled with pressure medium in the proportional valve 16 in hydraulic connection. Due to the joint machining of the anchor tube 25 and the transducer tube 26, which is firmly connected therewith, there is no center offset, so that the bores leading the anchor 31 and the transducer core 33 lie exactly coaxially with one another.
- the measuring coils 37 can be adjusted in a simple and easily accessible manner relative to the sensor core 33.
- the inner collar 28 located at a distance from the second section 22 and the additional air gap 42 prevent magnetic field lines of the proportional magnet 11 from interfering with the inductively operating displacement sensor 12. Due to the large mounting surface 47, which extends over the entire length of the housing 14 and thus over the area of the proportional magnet 11 and the displacement sensor 12, the housing cover 52 can be built relatively flat and yet accommodate the entire electronics unit 13 in an easily accessible form.
- the actuating device 10 thus enables a compact overall design, in particular, seen in the longitudinal direction, short.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Servomotors (AREA)
Description
Die Erfindung geht aus von einer Stelleinrichtung für ein hydraulisches, elektrisch steuerbares Proportionalventil nach der Gattung des Hauptanspruchs. Es ist schon eine solche Stelleinrichtung aus der DE-AS 29 20 670 bekannt, die ein gemeinsames Gehäuse für einen Proportionalmagneten und einen Wegaufnehmer aufweist. Im Gehäuse ist eine von einer Stirnseite zur anderen Stirnseite durchgehende Hohlbohrung vorgesehen, die mehrfach in einer Weise so abgesetzt ist, daß deren Abschnitt mit größter lichter Weite an der ventilseitigen Stirnseite liegt. Diese Stelleinrichtung hat den Nachteil, daß bei ihr sämtliche Bauelemente des Permanentmagneten und des Wegaufnehmers, die hier in einer sogenannten nassen Bauweise ausgeführt sind, von der ventilseitigen Stirnseite im Gehäuse montiert werden. Dabei ist das in der Hohlbohrung angeordnete Druckrohr in einer einstückigen Bauweise ausgeführt, wobei einzelne, zusammengesteckte Bauelemente des Druckrohres mit Hilfe von O-Ringen abgedichtet werden. Dies führt zu einer aufwendigen Bauweise und zu einer relativ schwierigen Montage, bei der zudem Dichtheits- und Mittenversatz-Probleme entstehen. Ferner ist hierbei von Nachteil, daß die für die Stelleinrichtung vorgesehene Elektronikeinheit in Längsrichtung an der ventilabgewandten Stirnseite des Gehäuses angebaut wird. Dies führt nicht nur zu einer relativ großen axialen Baulänge, sondern durch die verhältnismäßig kleine Stirnfläche auch zu einem geringen Platzangebot zum Anordnen der Elektronikeinheit und weiterhin zu relativ langen Kabelverbindungen. Ferner fehlen bei dieser Stelleinrichtung auch Mittel zum Justieren des Wegaufnehmers.The invention relates to an actuator for a hydraulic, electrically controllable proportional valve according to the preamble of the main claim. Such an actuating device is already known from DE-AS 29 20 670, which has a common housing for a proportional magnet and a displacement sensor. A hollow bore is provided in the housing from one end face to the other end face, which is offset several times in such a way that its section lies with the greatest internal width on the valve-side end face. This actuating device has the disadvantage that all components of the permanent magnet and the displacement transducer, which are designed here in a so-called wet design, are mounted in the housing from the valve-side end. The pressure pipe arranged in the hollow bore is designed in a one-piece construction, individual, plugged components of the pressure pipe being sealed with the aid of O-rings. This leads to a complex construction and to a relatively difficult assembly, which also creates tightness and center offset problems. It is also a disadvantage that the for Actuating device provided electronics unit is mounted in the longitudinal direction on the end of the housing facing away from the valve. This not only leads to a relatively large axial overall length, but also to a small amount of space for arranging the electronic unit and also to relatively long cable connections due to the relatively small end face. Furthermore, means for adjusting the displacement sensor are also missing in this actuating device.
Die erfindungsgemäße Stelleinrichtung für ein hydraulisches, elektrisch steuerbares Proportionalventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß sie eine kompakte und einfach herstellbare Baueinheit ergibt. Die Stelleinrichtung ist fernerhin leicht montierbar, da die einzelnen Bauelemente des Proportionalmagneten und des Wegaufnehmers von entgegengesetzten Stirnseiten her im Gehäuse eingebaut sind. Durch das einstückige Druckrohr sind die Probleme der Abdichtung auch bei nasser Bauweise und des Mittenversatzes von Anker des Proportionalmagneten zum Aufnehmerkern im Wegaufnehmer leicht beherrschbar. Die Stelleinrichtung ermöglicht ferner eine kurze axiale Baulänge und kurze Kabelverbindungen zu einer zu- gehörigen Elektronikeinheit.The actuating device according to the invention for a hydraulic, electrically controllable proportional valve with the characterizing features of the main claim has the advantage that it results in a compact and easy to manufacture unit. The actuating device is also easy to install, since the individual components of the proportional magnet and the displacement sensor are installed in the housing from opposite end faces. Thanks to the one-piece pressure tube, the sealing problems can be easily mastered even with wet construction and the center offset of the armature of the proportional magnet to the transducer core in the displacement transducer. The actuating device also enables a short axial length and short cable connections to an associated electronics unit.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Stelleinrichtung möglich. Besonders vorteilhaft ist eine Ausbildung nach Anspruch 2, da die Stelleinrichtung eine große, ebene Anbaufläche für die Elektronikeinheit ermöglicht, so daß ein größeres Platzangebot bei axialem Anbau zur Verfügung steht. Weitere zweckmäßige Ausgestaltungen ergeben sich aus den übrigen Ansprüchen, die besonders eine platzsparende und kostengünstige Bauweise sowie eine leichte Handhabung und Montage unterstützen.The measures listed in the subclaims permit advantageous developments and improvements of the actuating device specified in the main claim. An embodiment according to claim 2 is particularly advantageous since the actuating device enables a large, flat mounting surface for the electronics unit, so that a larger space is available with axial mounting. Further expedient configurations result from the remaining claims, which particularly support a space-saving and inexpensive construction as well as easy handling and assembly.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Die einzige Figur zeigt einen Längsschnitt durch die Stelleinrichtung mit angebauter Elektronikeinheit.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The single figure shows a longitudinal section through the actuating device with an attached electronic unit.
Die Stelleinrichtung 10 besteht im wesentlichen aus einem Proportionalmagneten 11, einem Wegaufnehmer 12 sowie einer zugehörigen Elektronikeinheit 13. Der Proportionalmagnet 11 und der Wegaufnehmer 12 sind in einem gemeinsamen Gehäuse 14 aus magnetisch leitendem Material angeordnet, an dessen ventilseitiger Stirnfläche 15 in an sich bekannter Weise ein nicht näher gezeichnetes Proportionalventil 16 angebaut wird.The
Im Gehäuse 14 verläuft in Längsrichtung von der ventilseitigen Stirnfläche 15 eine durchgehende Hohlbohrung 17 zu einer entgegengesetzt liegenden, ventilabgewandten, zweiten Stirnfläche 18. Diese Hohlbohrung 17 ist mehrfach abgesetzt und bildet einen zur ventilseitigen Stirnfläche 15 hin offenen, ersten Abschnitt 19 mit größerem Durchmesser, welcher im wesentlichen eine Magnetspule 21 des Proportionalmagneten 11 aufnimmt. An den ersten Abschnitt 19 schließt sich ein zweiter Abschnitt 22 mit kleinerem Durchmesser an, in dem ein Druckrohr 23 der Stelleinrichtung 10 geführt und gelagert ist. Der zweite Abschnitt 22 in der Hohlbohrung 17 geht in einen dritten Abschnitt 24 mit größerem Durchmesser über, der zur zweiten Stirnfläche 18 hin offen ist.In the
Das in die abgesetzte Hohlbohrung 17 eingeführte Druckrohr 23 besteht aus mehreren Einzelteilen, die zusammengesteckt sind, miteinander verlötet und anschließend bearbeitet werden, so daß das Druckrohr 23 nach seiner Bearbeitung ein einstückiges Gebilde ergibt. Das einstückige Druckrohr 23 besteht im wesentlichen aus einem Ankerrohr 25, das einen Längsabschnitt mit größerem Durchmesser bildet und einem damit fest verbundenen Aufnehmerrohr 26, das einen an den ersten Längsabschnitt anschließenden zweiten Längsabschnitt mit kleinerem Durchmesser bildet. Am offenen Ende des Ankerrohrs 25 ist ein ringförmiger Flansch 27 befestigt, mit dem das Druckrohr 23 im ersten Abschnitt 19 des Gehäuses 14 geführt ist. Am anderen Ende des Ankerrohres 25 geht es in einen verstärkten Innenbund 28 über, in dem das Aufnehmerrohr 26 mit seinem offenen Ende hart verlötet ist. Das Druckrohr 23 ist mit seinem ersten Längsabschnitt 25 im zweiten Abschnitt 22 mit kleinerem Durchmesser der Hohlbohrung 17 gelagert und ragt noch etwas in den dritten Abschnitt 24 hinein, so daß der Innenbund 28 im Abstand vom zweiten Abschnitt 22 mit kleinerem Durchmesser zu liegen kommt. Das Druckrohr 23 ragt mit seinem Aufnehmerrohr 26 somit frei in den dritten Abschnitt 24 hinein.The
Im Bereich des Ankerrohres 25 ist in dessem innenliegenden Hubraum 29 ein Anker 31 des Proportionalmagneten 11 längsbeweglich geführt. Über ein mechanisches Koppelglied 32 ist der Anker 31 starr mit einem Aufnehmerkern 33 verbunden, der im Aufnehmerrohr 26 geführt ist. Die Bewegung des Ankers 31 wird über eine Hubstange 34, welche einen Magnetkern 35 durchdringt, nach außen bzw. zum Proportionalventil 16 hin übertragen. Eine am Innenbund 28 sich abstützende Schraubenfeder 36 drückt den Anker 31 mit geringer Kraft in Richtung der ventilseitigen Stirnfläche 15.In the area of the
Am Außenumfang des Aufnehmerrohres 26 sind die Meßspulen 37 des Wegaufnehmers 12 mit Hilfe eines zugeordneten Spulenträgers 38 aus Kunststoff längsverschiebbar geführt. Mit einer üblichen Stift-Schlitz-Verbindung wird eine Verdrehsicherung 39 des Spulenträgers 38 im Gehäuse 14 erreicht. Der Spulenträger 38 stützt sich über eine Feder 41 am verstärkten Innenbund 28 des Druckrohres 23 ab, so daß zwischen den Meßspulen 37 und dem Innenbund 28 zur Abschirmung von störenden Magnetflußlinien ein Luftspalt 42 besteht. Das Ankerrohr 25 trägt an seinem geschlossenen Ende ein Außengewinde 43, auf dem eine zugeordnete Gewindemutter 44 sitzt, wodurch Justiermittel zur Längsverstellung der Meßspulen 37 vorgesehen sind. Der zur zweiten Stirnfläche 18 hin offene dritte Abschnitt 24 der Hohlbohrung 17 ist nach außen hin durch eine Schutzkappe 45 verschlossen. An der Gewindemutter 44 ist zusätzlich noch eine Schutzscheibe 46 gegen Magnetfeldbeeinflussung angeordnet.On the outer circumference of the
Das Gehäuse 14 der Stelleinrichtung 10 ist im Querschnitt im wesentlichen quadratisch und bildet an seiner oberen Längsseite eine ebene Montagefläche 47, die sich zwischen beiden Stirnflächen 15 und 18 erstreckt. Von dem ersten Abschnitt 19 der Hohlbohrung 17 führen zwei Ausnehmungen 48, 49 in diese Montagefläche 47, durch welche die Anschlußkabel der Magnetspule 21 hindurchgeführt werden. Ferner führt vom dritten Abschnitt 24 der Hohlbohrung 17 eine Ausnehmung 51 in die Montagefläche 47, durch welche die elektrischen Anschlußkabel von dem Wegaufnehmer 12 hindurchgeführt sind. Sämtliche Ausnehmungen 48, 49, 51 in der Montagefläche 47 werden von einem hutförmigen Gehäusedeckel 52 überdeckt, an dessen Innenseite die gesamte Elektronikeinheit 13 angebracht ist. Auf die Außenseite des Gehäusedeckels 52 führen lediglich die Steckanschlüsse 53 bzw. 54 für den Proportionalmagneten 11 bzw, den Wegaufnehmer 12. Für die Anordnung der Regelelektronik 13 steht somit im Gehäusedeckel 52 ein großes Platzangebot zur Verfügung, wobei zudem die Elektronikeinheit 13 nach außen hin mit Hilfe der ebenen Montagefläche 47 leicht abzudichten und zu schützen ist. Zudem ergeben sich hierbei kurze Kabelverbindungen zwischen den elektrischen Bauelementen, was einer kostengünstigen Bauweise und einer genauen Arbeitsweise förderlich ist.The
Die Montage der Stelleinrichtung 10 gestaltet sich besonders einfach und zeitsparend. So kann das Druckrohr 23 und die Magnetspule 21 von der ventilseitigen Stirnseite 15 her eingebaut werden, während anschließend die Meßspulen 37 und die Verdrehsicherung 39 von der anderen, zweiten Stirnfläche 18 her einbaubar ist. Die Montage gestaltet sich dadurch einfacher und übersichtlicher. Das einstückige Druckrohr 23 läßt sich leicht zum Proportionalventil 16 hin abdichten, wobei dessen Hubraum 29 mit Druckmittel gefüllten Räumen im Proportionalventil 16 in hydraulischer Verbindung steht. Durch die gemeinsame Bearbeitung von Ankerrohr 25 und dem damit fest verbundenen Aufnehmerrohr 26 entfällt ein Mittenversatz, so daß die den Anker 31 und den Aufnehmerkern 33 führenden Bohrungen genau koaxial zueinander liegen. Mit Hilfe der Justiereinrichtung 43, 44 sind die Meßspulen 37 in einfacher und leicht zugänglicher Weise relativ zum Aufnehmerkern 33 einstellbar. Durch den im Abstand vom zweiten Abschnitt 22 liegenden Innenbund 28 und durch den zusätzlichen Luftspalt 42 wird verhindert, daß magnetische Feldlinien des Proportionalmagneten 11 störend auf den induktiv arbeitenden Wegaufnehmer 12 einwirken. Durch die große Montagefläche 47, die sich über die gesamte Länge des Gehäuses 14 und somit über den Bereich des Proportionalmagneten 11 und des Wegaufnehmers 12 erstreckt, kann der Gehäusedeckel 52 relativ flach bauen und doch die gesamte Elektronikeinheit 13 in leicht zugänglicher Form aufnehmen. Die Stelleinrichtung 10 ermöglicht somit insgesamt eine kompakte, insbesondere in Längsrichtung gesehen, kurze Bauform.The assembly of the actuating
Claims (11)
- Actuating device for a hydraulic, electrically controllable proportional valve (16) having a housing (14) of magnetically conducting material in which are arranged a proportional magnet (11) and an inductively operating displacement sensor (12) arranged coaxially to the latter, which are in operative connection with a common electronic unit (13), and in which the proportional magnet (11) and the displacement sensor (12) have a common pressure tube (23), of which at least one longitudinal section (25) of larger diameter accommodates the armature (31) and at least one longitudinal section (26) of smaller diameter accommodates a sensor core (33), the armature and the core being coupled to one another mechanically, and in which the pressure tube (23) passes through a hollow bore (17) of the housing (14) which has a plurality of sections (19, 22, 24) of different diameters and in which a displacement space (29) of the pressure tube (23) is hydraulically connected to the hydraulic spaces of the proportional valve (16), a first section (19) of large diameter accommodating the coil (21) of the proportional magnet (11), being open to an end (15) on the valve side and adjoining an inner, second section (22) of smaller diameter in which the pressure tube (23) is guided by its longitudinal section (25) of larger diameter, the second section (22) adjoining a third section (24) which accommodates the coil (37) of the displacement sensor (12), characterised in that the third section (24) has a larger diameter than the inner, central section (22) and is open towards the other end (18) of the housing (14), which faces away from the valve, in that the pressure tube (23) is of integral construction and in that the coil (37) for the displacement sensor (12) is installed in the third section (24) of larger diameter from the other end (18), which faces away from the valve.
- Actuating device according to Claim 1, characterised in that the housing (14) has a mounting surface (47) which spans the proportional magnet (11) and the displacement sensor (12), which forms one longitudinal side of the housing and on which the electronic unit (13) is mounted.
- Actuating device according to Claim 2, characterised in that the mounting surface (47) is of flat design and, in particular, extends between both end faces (15, 18).
- Actuating device according to Claim 2 or 3, characterised in that leading from the two sections (19, 24) of larger diameter into the mounting surface (47) there is in each case at least one cutout (49, 51).
- Actuating device according to one or more of Claims 2 to 4, characterised in that mounted on the mounting surface (47) is an essentially hat-shaped housing cover (52), to the inside of which the electronic unit (13) is attached and the outside of which has the plug-in connections (53, 54) for the proportional magnet (11) and the displacement sensor (12).
- Actuating device according to one or more of Claims 1 to 5, characterised in that the measuring coils (37) of the displacement sensor (12) are secured against rotation relative to the housing (14), are guided in longitudinally displaceable fashion on the pressure tube (23) and are adjustable via adjusting means (43, 44) accessible from the end (18) facing away from the valve.
- Actuating device according to one or more of Claims 1 to 6, characterised in that, in the hollow bore (17), the section (22) of smaller diameter is arranged approximately centrally in the housing (14).
- Actuating device according to one or more of Claims 1 to 7, characterised in that, at its open end, the pressure tube (23) has an annular flange (27) by which it is guided near to the end (15) on the valve side in the section (19) of large diameter of the hollow bore (17).
- Actuating device according to one or more of Claims 1 to 8, having an armature tube, forming the longitudinal section of larger diameter, and a sensor tube firmly connected to the latter and forming the longitudinal section of smaller diameter, characterised in that, for the purpose of fixing the sensor tube (26), the armature tube (25) has a reinforced internal collar (28) which lies at a distance from the section (22) of small diameter in the hollow bore (17) and projects into the section (24) of larger diameter which faces away from the valve.
- Actuating device according to Claim 9, characterised in that an air gap (42), in which, in particular, a spring (41) is assigned to the adjusting means (43, 44) and loading the coil support (38) is arranged, is formed between the internal collar (28) and the sensor coils (37).
- Actuating device according to one or more of Claims 1 to 10, characterised in that, in the section (24) of larger diameter, the coil (37) of the displacement sensor (12) is shielded against disturbing magnetic field influences by a protective disc (46).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3704189 | 1987-02-11 | ||
| DE19873704189 DE3704189A1 (en) | 1987-02-11 | 1987-02-11 | CONTROL DEVICE FOR A HYDRAULIC, ELECTRICALLY CONTROLLABLE PROPORTIONAL VALVE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0278227A2 EP0278227A2 (en) | 1988-08-17 |
| EP0278227A3 EP0278227A3 (en) | 1989-12-13 |
| EP0278227B1 true EP0278227B1 (en) | 1992-10-21 |
Family
ID=6320730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88100238A Expired - Lifetime EP0278227B1 (en) | 1987-02-11 | 1988-01-11 | Actuating device for a hydraulic, electrically controlled proportional valve |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0278227B1 (en) |
| JP (1) | JP2640484B2 (en) |
| DE (2) | DE3704189A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707587B4 (en) * | 1997-02-26 | 2005-12-22 | Robert Bosch Gmbh | Electromagnetic actuator |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142996A1 (en) * | 1991-12-24 | 1993-07-01 | Bosch Gmbh Robert | METHOD FOR MEASURING THE MECHANICAL MOVEMENT OF A SOLENOID VALVE ARMOR, ESPECIALLY ELECTRICALLY CONTROLLED INJECTION SYSTEMS |
| DE19530935C2 (en) * | 1995-08-23 | 1999-06-17 | Mannesmann Rexroth Ag | Electrical control unit |
| DE19724076B4 (en) * | 1997-06-07 | 2005-05-04 | Robert Bosch Gmbh | Electromagnetic actuator |
| DE10121770A1 (en) * | 2001-05-04 | 2002-11-07 | Bosch Gmbh Robert | Electromagnetic actuator |
| DE102006014020A1 (en) * | 2006-01-17 | 2007-07-19 | Robert Bosch Gmbh | pole tube |
| DE102009058835A1 (en) | 2009-12-18 | 2011-06-22 | Robert Bosch GmbH, 70469 | Sensor coil e.g. linear variable differential transformer, for determining degree of opening of electromagnetically controllable proportional valve of hydraulic/pneumatic system, has conductive strips formed on coil carrier geometry |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54139185U (en) * | 1978-03-17 | 1979-09-27 | ||
| JPS57129909A (en) * | 1981-01-31 | 1982-08-12 | Robaato W Burandeeji | Fluid pressure apparatus |
| JPS57163782A (en) * | 1981-04-01 | 1982-10-08 | Hitachi Constr Mach Co Ltd | Solenoid valve |
| DE3113116A1 (en) * | 1981-04-01 | 1982-10-21 | Robert Bosch Gmbh, 7000 Stuttgart | "METHOD FOR COMPENSATING THE FLOW FORCE IN A FLAT VALVE VALVE AND FLAT VALVE VALVE WORKING THIS METHOD" |
| DE3132212C2 (en) * | 1981-08-14 | 1985-07-25 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | magnetic valve |
| JPS5940612U (en) * | 1982-09-10 | 1984-03-15 | ミサワホ−ム株式会社 | Cosmetic cap for fasteners |
| DE3241521A1 (en) * | 1982-11-10 | 1984-05-10 | Robert Bosch Gmbh, 7000 Stuttgart | Proportional magnet |
| JPS60231081A (en) * | 1984-04-30 | 1985-11-16 | Sanmei Denki Kk | Solenoid valve |
| DE3506053A1 (en) * | 1985-02-21 | 1986-08-21 | Mannesmann Rexroth GmbH, 8770 Lohr | Switching magnet for direct current for driving a valve element |
-
1987
- 1987-02-11 DE DE19873704189 patent/DE3704189A1/en not_active Withdrawn
-
1988
- 1988-01-11 DE DE8888100238T patent/DE3875351D1/en not_active Expired - Lifetime
- 1988-01-11 EP EP88100238A patent/EP0278227B1/en not_active Expired - Lifetime
- 1988-01-29 JP JP63017527A patent/JP2640484B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707587B4 (en) * | 1997-02-26 | 2005-12-22 | Robert Bosch Gmbh | Electromagnetic actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0278227A3 (en) | 1989-12-13 |
| DE3875351D1 (en) | 1992-11-26 |
| JPS63199903A (en) | 1988-08-18 |
| JP2640484B2 (en) | 1997-08-13 |
| DE3704189A1 (en) | 1988-08-25 |
| EP0278227A2 (en) | 1988-08-17 |
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