DE3242537A1 - Electromagnetic actuating device - Google Patents

Electromagnetic actuating device

Info

Publication number
DE3242537A1
DE3242537A1 DE19823242537 DE3242537A DE3242537A1 DE 3242537 A1 DE3242537 A1 DE 3242537A1 DE 19823242537 DE19823242537 DE 19823242537 DE 3242537 A DE3242537 A DE 3242537A DE 3242537 A1 DE3242537 A1 DE 3242537A1
Authority
DE
Germany
Prior art keywords
bobbin
pressure tube
core
screw
armature
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
DE19823242537
Other languages
German (de)
Other versions
DE3242537C2 (en
Inventor
Roland 7143 Vaihingen Schempp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19823242537 priority Critical patent/DE3242537A1/en
Publication of DE3242537A1 publication Critical patent/DE3242537A1/en
Application granted granted Critical
Publication of DE3242537C2 publication Critical patent/DE3242537C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2013—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core

Abstract

An inductive displacement sensor (11) is proposed which has a coil former (16) which is partially closely slidingly carried in the elongated ferritic pressure tube (14) of a solenoid (13). Sealing is effected by a sealing ring (29) which is located in front of the sensor coils (22, 23). A fine or readjustment of the coil former (16) with respect to the core (32) is possible at any time by means of a screw (40) which can be adjusted from the outside. <IMAGE>

Description

Elektromagnetische StelleinrichtungElectromagnetic actuator

Stand der Technik Die Erfindung geht aus von einer elektromagnetischen Stelleinrichtung nach der Gattung des Hauptanspruchs. Eine derartige, bekannte Stelleinrichtung hat den Nachteil, daß der induktive Wegaufnehmer separat an die Stelleinrichtung angebaut ird. Dieser muß über ein Zentralgewinde oder eine Flanschverbindung an den Magneten angeordnet werden Dadurch ergeben sich Druck- und Dichtigkeitsprobleme.PRIOR ART The invention is based on an electromagnetic one Adjusting device according to the genre of the main claim. Such a known adjusting device has the disadvantage that the inductive displacement transducer is attached separately to the actuating device cultivated. This must have a central thread or a flange connection The magnets are arranged.This results in pressure and tightness problems.

Vorteile der Erfindung Die erfindungsgemäße Stelleinrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß der Kernraum des Wegaufnehmers zu den Magnetspulen und zur Atmosphäre hin durch den einteiligen Spulenkörper selbst abgedichtet ist. Das verlängerte, ferritische Druckrohr des Magneten erhöht dessen Empfindlichkeit und gleicht somit eine Verminderung durch den Spulenkörper wieder aus. Der Wegaufnehme-r kann mittels einer Schraube einfach von außen her ajustiert werden. Der Aufbau des Wegaufnehmers ist somit einfach und billig.Advantages of the Invention The adjusting device according to the invention with the characterizing features of the main claim has the advantage that the Core space of the displacement transducer to the magnet coils and to the atmosphere through the one-piece bobbin itself is sealed. The elongated, ferritic pressure pipe of the magnet increases its sensitivity and thus compensates for a reduction the bobbin off again. The Wegaufnahme-r can easily with a screw from the outside can be adjusted. The structure of the transducer is thus easy and cheap.

Zeichnung Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigt Figur 1 einen Längsschnitt durch einen induktiven Wegaufnehmer und Figur 2 einen Längs schnitt durch einen einteiligen Spulenkörper.Drawing An embodiment of the invention is shown in the drawing shown and explained in more detail in the following description. It shows figure 1 shows a longitudinal section through an inductive displacement transducer and FIG. 2 shows a longitudinal section cut through a one-piece bobbin.

Beschreibung des Ausführungsbeispiels Ein topfförmiges Gehäuse 10 eines induktiven Wegaufnehmers 11 ist mittels zweier Schrauben 12, 12' an einem nicht näher dargestellten Magneten 13 befestigt. In das Innere des Gehäuses 10 ragt ein verlängertes, ferritisches Druckrohr 14 des Magneten 13. Im Endteil des Druckrohrs 14 ist teilweise ein einteiliger Spulenkörper 16 aus unmagnetischem Werkstoff dicht gleitend geführt. Das zylindrische Längsteil 17 des Spulenkörpers 16 gleitet im Druckrohr 14, während sein flanschartiger Bund 18 mit größerem Durchmesser als der des Druckrohrs 14 sich außerhalb desselben befindet. Am Längsteil 17 des Spulenkörpers 18 sind zwei Ringnuten 19, 20 ausgebildet, deren jede eine Sensorspule 22, 23 aufnimmt-.Description of the exemplary embodiment A pot-shaped housing 10 an inductive displacement transducer 11 is by means of two screws 12, 12 'on one Magnet 13, not shown in detail, attached. In the interior of the housing 10 protrudes an elongated, ferritic pressure tube 14 of the magnet 13. In the end part of the pressure tube 14 is partially a one-piece bobbin 16 made of non-magnetic material tight slidingly guided. The cylindrical longitudinal part 17 of the bobbin 16 slides in Pressure pipe 14, while its flange-like collar 18 with a larger diameter than the of the pressure pipe 14 is located outside the same. On the longitudinal part 17 of the bobbin 18, two annular grooves 19, 20 are formed, each of which receives a sensor coil 22, 23.

Ausgehend von der Ringnut 19 befindet sich am Außenumfang des Spulenkörpers 16 eine bis zum Beginn des Bundes 18 verlaufende Längsnut 24. Diese reduziert in ihrem Bereich die Wirbelströme, welche kreisförmig um die Achse des Spulenkörpers 16 in diesem fließen. In der Längsnut 24 sind Verbindungsdrähte 5 und Zuleitungen 26 der beiden Sensorspulen 22, 23 angeordnet. An dem dem Magneten 13 zugewandten Ende ist im Spulenkörper 16 eine Ringnut 28 ausgebildet, in der ein Dichtring ^t) angeordnet ist. Dieser dichtet die Sensorspulen 22, 23 zum Ankerraum 30 hin ab.Starting from the annular groove 19 is located on the outer circumference of the coil body 16 a longitudinal groove 24 extending to the beginning of the collar 18. This reduces in their area the eddy currents, which are circular around the axis of the bobbin 16 in this flow. In the longitudinal groove 24 there are connecting wires 5 and leads 26 of the two sensor coils 22, 23 are arranged. On the magnet 13 facing At the end, an annular groove 28 is formed in the bobbin 16, in which a sealing ring ^ t) is arranged. This seals the sensor coils 22, 23 to the anchor room 30 down.

Im Spulenkörper 16 ist eine mittige Sackbohrung 31 ausgebildet, in der ein rohrförmiger Kern 32 angeordnet ist. Er ist durch eine Schraube 33 gegebenenfalls unter Zwischenschalten einer Distanzhülse 34 mit dem Anker 35 des Magneten 13 verbunden. Der Kern 32 und die Sensorspulen 22, 23 stehen miteinander in Wirkverbindung und bilden den Wegaufnehmer.A central blind hole 31 is formed in the bobbin 16, in which a tubular core 32 is arranged. He is by a screw 33 if necessary connected to the armature 35 of the magnet 13 with the interposition of a spacer sleeve 34. The core 32 and the sensor coils 22, 23 are in operative connection with one another and form the displacement transducer.

Der Anker 35 ist im Druckrohr 14 mit Spiel geführt und betätigt mittels eines Stößels 37 ein nicht dargestelltes Ventil. Eine Druckfeder 38 liegt mit ihrem einen Ende am Bund 18, mit ihrem anderen Ende am Magneten 13 an; geführt wird sie vom Druckrohr 14.The armature 35 is guided in the pressure pipe 14 with play and operated by means of of a tappet 37 is a valve, not shown. A compression spring 38 lies with her one end to the collar 18, with its other end to the magnet 13; it is led from pressure pipe 14.

Im Boden des Gehäuses 10 befindet sich eine mittige Bohrung 39, in die eine in das Gehäuse ragende Schraube 40 eingeschraubt ist. Sie bildet ein Widerlager für den Spulenkörper 16, dessen Bund 18 an ihr unter der Wirkung der Druckfeder 38 anliegt. Außerhalb des Gehäuses 10 wird die Schraube 40 von einer Mutter 41 gesichert.In the bottom of the housing 10 there is a central bore 39, in the one screw 40 protruding into the housing is screwed. It forms an abutment for the bobbin 16, the collar 18 of which on her under the action of the compression spring 38 is present. Outside the housing 10, the screw 40 is secured by a nut 41.

Durch die Distanzhülse 34 wird eine Grobjustierung des Kerns 32 gegenüber den Sensorspulen 22, 23 erreicht. Der Spulenkörper 16 kann jederzeit von außen her feinjustiert werden, in dem mittels der Schraube 40 der Spulenkörper 16 relativ zu den Sensorspulen 22, 23 verschoben wird, wobei die Druckfeder 38 die entsprechende Gegenkraft bildet.The spacer sleeve 34 enables a rough adjustment of the core 32 in relation to it the sensor coils 22, 23 reached. The bobbin 16 can at any time from the outside be finely adjusted by means of the screw 40 of the coil body 16 relative to the sensor coils 22, 23 is shifted, the compression spring 38 the corresponding Counterforce forms.

Wird die Lage des Ankers 35 verändert, so bewegt sich synchron mit ihm der Kern 32 im magnetischen Feld, das von den Strom durchflossenen Sensorspulen 22, 23 hervorgerufen wird Über die Induktivitässtromänderung kann die Positionsänderung des Kerns 36 bestimmt werden. Der Ankerraum 30 sowie die Sackbohrung 31 stehen unter Druck. Durch den an dem Druckrohr 14 anliegenden Spulenkörper 16 und den Dichtring 29 sind die Sensorspulen 22, 23 dicht abgeschlossen.If the position of the armature 35 is changed, it moves synchronously with it him the core 32 in the magnetic field generated by the Electricity flowing through it Sensor coils 22, 23 is caused. Via the change in inductivity, the Change in position of the core 36 can be determined. The anchor space 30 and the blind hole 31 are under pressure. Through the coil body 16 resting on the pressure pipe 14 and the sealing ring 29, the sensor coils 22, 23 are sealed off.

LeerseiteBlank page

Claims (3)

Ansprüche Elektromagnetische Stelleinrichtung mit einem induktiven Wegaufnehmer, bestehend aus in einem Druckrohr angeordneter, außenliegender Spule und innenliegendem Kern, der mit einem in einem Druckrohr der Stelleinrichtung gleitend geführten Anker der Stelleinrichtung fest verbunden ist, dadurch gekennzeichnet, daß das Druckrohr (14) der Stelleinrichtung verlängert ist, daß in diesem ein einteiliger Spulenkörper (16) mit mindestens einer Sensorspule dicht gleitend geführt ist, und daß sich der Spulenkörper (16) an einem einstellbaren Widerlager abstützt. Claims Electromagnetic control device with an inductive Displacement transducer, consisting of an external coil arranged in a pressure tube and internal core that slides with one in a pressure tube of the actuator guided armature is firmly connected to the actuating device, characterized in that that the pressure tube (14) of the adjusting device is extended, that in this a one-piece Bobbin (16) is guided with at least one sensor coil so as to slide tightly, and that the bobbin (16) is supported on an adjustable abutment. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß dr Spulenkörper (16) durch eine Druckfeder (38) an dem als Justierschraube ausgebildeten Widerlager anliegt. 2. Device according to claim 1, characterized in that dr bobbin (16) by a compression spring (38) on the abutment designed as an adjusting screw is present. 3. Einrichtung nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß der Kern (32) mittels einer eingeklebten Schraube (33), gegebenenfalls unter Zwischenschaltung einer Distanzhülse (34), am Anker (35) befestigt ist. 3. Device according to claim 1 and / or 2, characterized in that that the core (32) by means of a glued-in screw (33), optionally under Interposition of a spacer sleeve (34) attached to the armature (35).
DE19823242537 1982-11-18 1982-11-18 Electromagnetic actuating device Granted DE3242537A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823242537 DE3242537A1 (en) 1982-11-18 1982-11-18 Electromagnetic actuating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823242537 DE3242537A1 (en) 1982-11-18 1982-11-18 Electromagnetic actuating device

Publications (2)

Publication Number Publication Date
DE3242537A1 true DE3242537A1 (en) 1984-05-24
DE3242537C2 DE3242537C2 (en) 1991-11-21

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ID=6178373

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823242537 Granted DE3242537A1 (en) 1982-11-18 1982-11-18 Electromagnetic actuating device

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DE (1) DE3242537A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296782A2 (en) * 1987-06-20 1988-12-28 LUCAS INDUSTRIES public limited company Linear inductive transducer
DE4017950A1 (en) * 1990-06-05 1991-12-12 Wabco Westinghouse Fahrzeug Vehicle brake operating device - uses detected play for adjustment of brake operating shaft relative to brake lever
US5325734A (en) * 1990-10-24 1994-07-05 Lucas Industries Public Limited Company Device for positioning a sensor
DE19624233C1 (en) * 1996-06-18 1997-10-09 A B Elektronik Gmbh Linear displacement detection device
WO2001040039A1 (en) * 1999-12-03 2001-06-07 Methode Electronics Malta Ltd. Pedal system for a motor vehicle comprising a displacement sensor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4323752C2 (en) * 1993-07-15 1995-05-18 Grau Gmbh Displacement sensor
DE19653396B4 (en) * 1996-12-20 2005-10-06 Wabco Gmbh & Co.Ohg Device with a valve and a displacement sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564221A (en) * 1948-01-22 1951-08-14 Bailey Meter Co Electromagnetic motion responsive device
DE1944321A1 (en) * 1968-10-10 1970-04-16 Starrfraesmaschinen Ag Mechanical-electrical transducer, especially for a sequential control device
DE2631846B1 (en) * 1976-07-15 1977-12-08 Rexroth Gmbh G L Inductive displacement generator for hydraulic units - has screw-on plug connector and lock nut to set datum position
DE2914195C2 (en) * 1979-04-07 1987-07-09 Mannesmann Rexroth Gmbh, 8770 Lohr, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564221A (en) * 1948-01-22 1951-08-14 Bailey Meter Co Electromagnetic motion responsive device
DE1944321A1 (en) * 1968-10-10 1970-04-16 Starrfraesmaschinen Ag Mechanical-electrical transducer, especially for a sequential control device
DE2631846B1 (en) * 1976-07-15 1977-12-08 Rexroth Gmbh G L Inductive displacement generator for hydraulic units - has screw-on plug connector and lock nut to set datum position
DE2914195C2 (en) * 1979-04-07 1987-07-09 Mannesmann Rexroth Gmbh, 8770 Lohr, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z.: Technische Rundschauz Sulzer 1/1978, S. 17-22 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296782A2 (en) * 1987-06-20 1988-12-28 LUCAS INDUSTRIES public limited company Linear inductive transducer
EP0296782A3 (en) * 1987-06-20 1990-03-14 LUCAS INDUSTRIES public limited company Linear inductive transducer
DE4017950A1 (en) * 1990-06-05 1991-12-12 Wabco Westinghouse Fahrzeug Vehicle brake operating device - uses detected play for adjustment of brake operating shaft relative to brake lever
US5325734A (en) * 1990-10-24 1994-07-05 Lucas Industries Public Limited Company Device for positioning a sensor
DE19624233C1 (en) * 1996-06-18 1997-10-09 A B Elektronik Gmbh Linear displacement detection device
WO2001040039A1 (en) * 1999-12-03 2001-06-07 Methode Electronics Malta Ltd. Pedal system for a motor vehicle comprising a displacement sensor

Also Published As

Publication number Publication date
DE3242537C2 (en) 1991-11-21

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8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee