EP0268030A2 - Potentiomètre respectivement résistance variable - Google Patents

Potentiomètre respectivement résistance variable Download PDF

Info

Publication number
EP0268030A2
EP0268030A2 EP87112533A EP87112533A EP0268030A2 EP 0268030 A2 EP0268030 A2 EP 0268030A2 EP 87112533 A EP87112533 A EP 87112533A EP 87112533 A EP87112533 A EP 87112533A EP 0268030 A2 EP0268030 A2 EP 0268030A2
Authority
EP
European Patent Office
Prior art keywords
piston
contact member
potentiometer
actuator
resistance track
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
EP87112533A
Other languages
German (de)
English (en)
Other versions
EP0268030B1 (fr
EP0268030A3 (en
Inventor
Helmut Göttling
Ralf Kook
Rudolf Ing. grad. Möller
Peter Müller
Gerhard Ing. Grad. Scharnowski
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.)
Aventics GmbH
Original Assignee
Mannesmann Rexroth Pneumatik GmbH
Wabco Westinghouse Steuerungstechnik and Co 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 Mannesmann Rexroth Pneumatik GmbH, Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Mannesmann Rexroth Pneumatik GmbH
Priority to AT87112533T priority Critical patent/ATE77711T1/de
Publication of EP0268030A2 publication Critical patent/EP0268030A2/fr
Publication of EP0268030A3 publication Critical patent/EP0268030A3/de
Application granted granted Critical
Publication of EP0268030B1 publication Critical patent/EP0268030B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2853—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using potentiometers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/14—Adjustable resistors adjustable by auxiliary driving means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path

Definitions

  • the invention relates to a potentiometer or variable resistance, in particular for detecting the position of the piston of a pressure-actuated working cylinder, according to the preamble of claim 1.
  • a potentiometer is known from DE 35 20 199 A1, which consists of a resistance track and a contact link that can be guided along the resistance track by means of an actuating member.
  • the actuator consists of a rod-shaped body.
  • the resistance track and the contact member connected to the rod-shaped body are arranged in a housing in order to protect the resistance track and the contact member from dust and moisture.
  • the actuator which is designed as a rod-shaped body, is led out of the housing in a sealed manner through an opening provided in the housing. If the potentiometer is used, for example, to detect the position of the piston of a working cylinder, it is necessary to arrange the part carrying the resistance track on the cylinder and to connect the actuator to the piston or to the piston rod of the working cylinder.
  • the contact member in a rotationally fixed manner with respect to the resistance track with respect to an axis intended in the direction of movement of the contact member.
  • the invention has for its object to provide a potentiometer or a variable resistor of the type mentioned, in which a relative movement (rotation) between the contact member and fastening member is made possible.
  • the invention offers in particular the advantage of obtaining a potentiometer or a variable resistor with an actuating element for the contact element which operates in a contactless manner with respect to the contact element.
  • the contact element in the potentiometer or variable resistor according to the invention is designed in such a way that it contains the permanent magnet
  • the potentiometer or the variable resistor for determining the position of the piston of a working cylinder can also be arranged retrospectively on each working cylinder, the piston of which is at least partially made of a ferromagnetic Material exists. It is no longer necessary to establish a mechanical connection between the piston rod and the actuating element in order to actuate the potentiometer or the variable resistance.
  • Fig. 1 shows a working cylinder (1) in which a piston (8) connected to a piston rod (4) is arranged displaceably and sealed.
  • the piston (8) divides the working cylinder (1) into a first pressure medium chamber (3) on the piston rod side and a second pressure medium chamber (12) opposite the first pressure medium chamber (3) on the other side of the piston (8).
  • the two pressure medium chambers (3, 12) can each be connected to a pressure medium source via a pressure medium connection (2) or (11) and a valve device (not shown).
  • the piston rod (4) has a preferably cylindrical recess (5) running in the direction of its longitudinal axis, which begins at the end of the piston rod (4) that extends into the cylinder (1) and moves in the manner of a blind bore in the direction of the through a recess (24) provided in the cylinder bottom extends from the end region of the piston rod (4) which is led out of the working cylinder (1).
  • the piston (8) and the piston rod (4) are designed and connected to one another in such a way that the end of the piston rod (4) inside the working cylinder (1) is guided centrally through the piston (8).
  • a tubular body (6) made of a non-magnetizable material, such as. As aluminum or plastic, arranged in a fixed position, which is inserted into the recess (5) of the piston rod (4).
  • the tubular body (6) is closed at its free end in the recess (5) of the piston rod (4) by a base (23), so that the interior of the tubular body (6) is closed off from the second pressure medium chamber (12) .
  • a permanent magnet (10) which serves as an actuating element and is mounted in a groove (9) of the piston rod (4) facing the tubular body (6), surrounds the tubular body (6) in a ring-like manner.
  • a carrier (19) preferably made of plastic, for a resistance track (13) and a conductor (18) is arranged in the tubular body (6).
  • the carrier (19) can consist of two identical parts (19a) and (19b) which are symmetrically arranged with respect to one another.
  • the outer contour of the carrier (19) is adapted to the inner wall of the tubular body (6).
  • Grooves (26, 27) are provided in the support (19) in the direction of the longitudinal axis of the support (19) and are used to guide a contact member.
  • the contact member is composed of a sliding piece (22) made of a ferromagnetic material and two sliding contacts (15, 16).
  • the resistance track (13) and the conductor (18) are inserted parallel to the longitudinal axis of the slide (22) in corresponding grooves of the parts (19a, 19b) and arranged to the slide (22) so that the resistance track (13) with the sliding contact (15) and the conductor (18) cooperates with the sliding contact (16).
  • the slide (22) for the sliding contacts (15, 16) has, as shown in Fig. 2, an approximately cruciform profile and has a stepped part in its free end region for fastening the resilient to the resistance track (13) and the conductor (18th ) adjacent sliding contacts (15, 16).
  • Electrical lines (7, 17, 14) are connected to the resistance track (13) and the conductor (18) and lead to a plug (21) arranged on the working cylinder (1).
  • Fig. 3 shows a working cylinder with an integrated potentiometer, wherein the actuator consists of a ferromagnetic material and is arranged in the piston of the working cylinder.
  • the actuator consists of a ferromagnetic material and is arranged in the piston of the working cylinder.
  • a piston (8) connected to a piston rod (4) is arranged displaceably and sealed in a working cylinder (1).
  • the piston (8) divides the working cylinder (1) into a pressure medium chamber (3) on the piston rod side and a second pressure medium chamber (12) opposite the first pressure medium chamber (3) on the other side of the piston (8).
  • the two pressure medium chambers (3, 12) can each be connected to a pressure medium source via a pressure medium connection (2) or (11) and a valve device (not shown).
  • the piston rod (4) has a preferably cylindrical recess (5) running in the direction of its longitudinal axis, which begins at the end of the piston rod (4) extending into the cylinder (1) and moves in the manner of a blind bore in the direction of the through a recess (24) provided in the cylinder bottom extends from the end region of the piston rod (4) which is led out of the working cylinder (1).
  • the piston (8) and the piston rod (4) are designed and connected to one another in such a way that the end of the piston rod (4) inside the working cylinder (1) is guided centrally through the piston (8) and ends with the side of the piston (8) delimiting the second pressure medium chamber (12).
  • a tubular body (6) made of a non-magnetizable material, for. As aluminum or plastic, arranged in a fixed position, which is inserted into the recess (5) of the piston rod (4).
  • the tubular body (6) is closed at its free end in the recess (5) of the piston rod (4) by a base (23), so that the interior of the tubular body (6) is sealed off from the second pressure medium chamber (12) .
  • a carrier (19), preferably made of plastic, for a resistance track (13) and a conductor (18) is arranged in the tubular body (6).
  • the outer contour of the carrier (19) is adapted to the inner wall of the tubular body (6).
  • the carrier (19) is additionally designed as a guide device (25) for a contact member.
  • the guide device which serves as a guide means for guiding the contact element, which is driven by an actuating element in a contactless manner under the influence of magnetic forces, is thus arranged in a stationary manner with respect to the resistance track. For this purpose, it has grooves running in the direction of its longitudinal axis.
  • the contact member is composed of a permanent magnet (22) designed as a slider and two sliding contacts (15, 16) arranged thereon.
  • the piston (8) has a disk-shaped body (9) which serves as an actuating element and is made of a ferromagnetic material.
  • a separate disk-shaped body as an actuator on the piston if the piston itself is made of a disk-shaped carrier made of a ferromagnetic material, such as, for. B. steel, and a ring-shaped sealing element surrounding the carrier.
  • the actuating member consists of a ferromagnetic material or contains a ferromagnetic material
  • the contact member consists of a magnetic material or contains a magnetic material
  • Fig. 4 shows a part of a working cylinder, which is composed of a cylinder (39), a bottom (33), a cover (25) and a piston (40) with a piston rod (43) which is sealed in the cylinder (39).
  • the base (33) and the cover (25) are arranged on the two opposite ends of the cylinder (39) and are clamped to the cylinder (39) by means of tie rods connecting the base (33) and the cover (25).
  • tie rod (27) is on the one hand through a bore (36) running parallel to the longitudinal axis of the cylinder (39), which is arranged in a part of the base (33) protruding beyond the cylinder jacket, and on the other hand through a bore parallel to the longitudinal axis of the cylinder (39 ) extending bore (26) in a part of the cover (25) protruding beyond the cylinder jacket.
  • Nuts (38, 44) the bottom (33) and the cover (25) are held on the end faces of the cylinder (39).
  • the tie rod (27) has a recess (29) running in the direction of its longitudinal axis, in which a potentiometer consisting of a resistance track (28), feedback (31) and contact element (30) is arranged.
  • the housing of the potentiometer is formed by the tie rod (27).
  • the contact member (30) designed as a sliding contact consists of a ferromagnetic material. Permanent magnets (41, 42) arranged on the piston (40) serve as the actuating element for the contact element (30).
  • the resistance track (28) and the feedback (31) of the potentiometer are connected via connecting wires (34, 35) to a plug (32) which is arranged on the bottom (33) of the working cylinder.
  • the invention naturally extends not only to the exemplary embodiments described, but also permits a large number of variants.
  • the contact member and the actuating member with at least one permanent magnet each.
  • the contact member can be self-supporting, so that a support for the sliding contacts can be dispensed with.
  • the contacts (such as sliding contacts) either consist of a ferromagnetic material or made of a magnetic material and are shaped in such a way that they can be guided along the resistance track in a manner such that they cannot twist and tip over.
  • the invention can be applied both to a potentiometer and to a variable resistor.
  • the individual components of the potentiometer or the variable resistor can be arranged in a housing, so that an independent device is created which can be attached to or installed in devices and devices for a wide variety of purposes.
  • the resistance track and the contact member-containing housing slidably an annular body containing a permanent magnet or a ferromagnetic part, may be arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Actuator (AREA)
  • Adjustable Resistors (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Control Of Eletrric Generators (AREA)
EP87112533A 1986-11-15 1987-08-28 Potentiomètre respectivement résistance variable Expired - Lifetime EP0268030B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112533T ATE77711T1 (de) 1986-11-15 1987-08-28 Potentiometer bzw. veraenderbarer widerstand.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863639150 DE3639150A1 (de) 1986-11-15 1986-11-15 Potentiometer bzw. veraenderbarer widerstand
DE3639150 1986-11-15

Publications (3)

Publication Number Publication Date
EP0268030A2 true EP0268030A2 (fr) 1988-05-25
EP0268030A3 EP0268030A3 (en) 1989-11-29
EP0268030B1 EP0268030B1 (fr) 1992-06-24

Family

ID=6314078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112533A Expired - Lifetime EP0268030B1 (fr) 1986-11-15 1987-08-28 Potentiomètre respectivement résistance variable

Country Status (4)

Country Link
US (1) US4910491A (fr)
EP (1) EP0268030B1 (fr)
AT (1) ATE77711T1 (fr)
DE (2) DE3639150A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253062A (en) * 1991-02-21 1992-08-26 Mannesmann Ag Potentiometer apparatus for measuring the displacement of a piston in a cylinder
WO2009043637A1 (fr) * 2007-09-27 2009-04-09 Deere & Company Appareil et procédé de mesure pour vérin à fluide sous pression

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4015720A1 (de) * 1990-05-16 1992-04-09 Helag Electronic Gmbh Elektrischer weg- oder winkelsensor
DE4105702A1 (de) * 1991-02-21 1992-09-03 Mannesmann Ag Linearer wegaufnehmer
DE4141739A1 (de) * 1991-12-13 1993-06-17 Mannesmann Ag Verfahren zum betrieb einer resistiven wegmesseinheit
US5589664A (en) * 1993-09-21 1996-12-31 Temper Corporation Apparatus for containing electrical components for sensing or measuring magnetic fields
DE19606609A1 (de) * 1996-02-22 1997-08-28 Claas Ohg Hydraulische Lenkvorrichtung für selbstfahrende Arbeitsmaschinen
DE60140295D1 (de) * 2001-06-07 2009-12-10 Gefran Spa Anordnung eines Positionssensors in einer Kolben-Zylinder-Einheit
US11248427B2 (en) 2018-08-06 2022-02-15 Schlumberger Technology Corporation Systems and methods for manipulating wellbore completion products
CN115917115A (zh) * 2020-05-02 2023-04-04 斯伦贝谢技术有限公司 用于定位移位轮廓几何的系统和方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821126Y2 (ja) * 1976-08-06 1983-05-04 電気音響株式会社 ポテンシヨメ−タ
US4125821A (en) * 1977-08-05 1978-11-14 Denki Onkyo Company, Limited Potentiometer providing a non-linear output
JPS5487561A (en) * 1977-12-23 1979-07-12 Aisin Seiki Oil level detector
JPS57162405A (en) * 1981-03-31 1982-10-06 Kogyo Gijutsuin Noncontact potentiometer
DE3149516A1 (de) * 1981-12-14 1983-07-07 Wabco Steuerungstechnik GmbH & Co, 3000 Hannover Einrichtung zum erfassen der kolbenstellung eines zylinders
DE3241525A1 (de) * 1982-11-10 1984-05-10 Wabco Westinghouse Steuerungstechnik GmbH & Co, 3000 Hannover Einrichtung zum erfassen der position oder/und der geschwindigkeit des kolbens eines arbeitszylinders
US4479107A (en) * 1982-11-24 1984-10-23 Cts Corporation Precision linear potentiometer sensor
SE436072B (sv) * 1983-03-22 1984-11-05 Hara Ab Potentiometeranordning for legesbestemning av hydraulkolvar och liknande
DE3325400C2 (de) * 1983-07-14 1986-04-10 Integral Hydraulik & Co, 4000 Düsseldorf Hydraulik-Zylinder mit innenliegender Wegumformung
JPS6160135U (fr) * 1984-09-27 1986-04-23
DE3520199A1 (de) * 1984-10-05 1986-04-10 Wabco Westinghouse Steuerungstechnik GmbH & Co, 3000 Hannover Potentiometer
DE3442879C2 (de) * 1984-11-24 1994-09-01 Wabco Vermoegensverwaltung Einrichtung zum Erfassen der relativen Position von zwei relativ zueinander bewegbaren Teilen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253062A (en) * 1991-02-21 1992-08-26 Mannesmann Ag Potentiometer apparatus for measuring the displacement of a piston in a cylinder
WO2009043637A1 (fr) * 2007-09-27 2009-04-09 Deere & Company Appareil et procédé de mesure pour vérin à fluide sous pression

Also Published As

Publication number Publication date
EP0268030B1 (fr) 1992-06-24
DE3780001D1 (de) 1992-07-30
US4910491A (en) 1990-03-20
DE3639150A1 (de) 1988-05-19
ATE77711T1 (de) 1992-07-15
EP0268030A3 (en) 1989-11-29

Similar Documents

Publication Publication Date Title
EP0177693A2 (fr) Potentiomètre
EP1862767A2 (fr) Capteur de position de sécurité pour cylindre, cylindre doté d'un tel capteur de position
EP0268030A2 (fr) Potentiomètre respectivement résistance variable
EP3683479A1 (fr) Système de réglage pour une soupape
EP0775835B1 (fr) Appareil de détection de position
DE3405315C2 (fr)
EP0207270B1 (fr) Dispositif de commutation fonctionnant sans contact par détecteur de proximité
EP0591614B1 (fr) Vérin
EP0398012A2 (fr) Cylindre de travail avec un capteur pour la détermination de la position du piston
AT394273B (de) Wegmesseinrichtung fuer ein in einem gehaeuse bewegbares bauelement
DE3524414C2 (de) Linearantrieb
DE20106298U1 (de) Linearantrieb
DE29713825U1 (de) Fluidbetätigter Arbeitszylinder
DE4328366C2 (de) Näherungsschalter
DE19545923A1 (de) Einrichtung mit einem Zylinder, einem in diesem verschiebbaren Kolben und einem im Zylinder angeordneten, induktiven Meßwandler
DE3532988C2 (de) Elektrohydraulische Schaltvorrichtung
DE3217954C2 (fr)
DE2734853C2 (de) Filter zur Reinigung von Flüssigkeiten
EP1691165B1 (fr) Dispositif destiné à la vérification des tolérances de dimension, de forme et de position d'une pièce mécanique
DE19846418A1 (de) Hydraulikventil mit Sensor
DE10329045B4 (de) Einrichtung zur Ermittlung mindestens einer Endlagenposition eines Antriebsgliedes, insbesondere eines druckmittelbetriebenen Linear- oder Drehantriebes
DE102016207982A1 (de) Stellvorrichtung
EP0840333B1 (fr) Dispositif de commutation avec capteur de déplacement
DE10108536A1 (de) Pneumatikventil mit Mitteln zur elektrischen Erfassung der Endposition eines innenliegenden Schaltelements
DE19653396B4 (de) Einrichtung mit einem Ventil und einem Wegsensor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE ES FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19891020

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MANNESMANN REXROTH PNEUMATIK GMBH

17Q First examination report despatched

Effective date: 19910124

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920624

REF Corresponds to:

Ref document number: 77711

Country of ref document: AT

Date of ref document: 19920715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3780001

Country of ref document: DE

Date of ref document: 19920730

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920828

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920831

Ref country code: CH

Effective date: 19920831

ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19921005

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930714

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930720

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940828

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940828

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950428

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010816

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050828