EP0133871A2 - Dispositif pour détecter la position d'un deuxième point variable par rapport à un premier point - Google Patents

Dispositif pour détecter la position d'un deuxième point variable par rapport à un premier point Download PDF

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Publication number
EP0133871A2
EP0133871A2 EP84105776A EP84105776A EP0133871A2 EP 0133871 A2 EP0133871 A2 EP 0133871A2 EP 84105776 A EP84105776 A EP 84105776A EP 84105776 A EP84105776 A EP 84105776A EP 0133871 A2 EP0133871 A2 EP 0133871A2
Authority
EP
European Patent Office
Prior art keywords
elastic element
cylinder
housing
displacement sensor
point
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
EP84105776A
Other languages
German (de)
English (en)
Other versions
EP0133871B1 (fr
EP0133871A3 (en
Inventor
Helmut Göttling
Rudolf Möller
Walter Brausfeld
Peter Müller
Gerhard 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.)
Wabco Westinghouse Steuerungstechnik and Co GmbH
Original Assignee
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 Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Wabco Westinghouse Steuerungstechnik and Co GmbH
Priority to AT84105776T priority Critical patent/ATE36039T1/de
Publication of EP0133871A2 publication Critical patent/EP0133871A2/fr
Publication of EP0133871A3 publication Critical patent/EP0133871A3/de
Application granted granted Critical
Publication of EP0133871B1 publication Critical patent/EP0133871B1/fr
Expired legal-status Critical Current

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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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S33/00—Geometrical instruments
    • Y10S33/15—Piston position indicator

Definitions

  • the invention relates to a device for detecting the position of a second point that can be changed relative to a first point according to the preamble of patent claim 1.
  • Such devices find e.g. Use as a positioning device on working cylinders to determine the respective piston position or to be able to precisely control the piston stroke as a function of predeterminable values.
  • the invention has for its object to provide a device of the type mentioned, which can be manufactured with simple means and with only a small amount of components.
  • the device according to the invention has the particular advantage of being universally applicable. Since only one with one is used to detect the position of the second part, which is movable relative to a first part Elastic element interacting with the displacement transducer is required, the elongation of which is measured in a predeterminable range (travel reduction - long piston travel, short measuring distance -), this device can be used to measure not only a straight travel but also a curved travel in a simple manner.
  • the device can be arranged both in the cylinder and on the cylinder housing. It is thus possible to retrofit any working cylinder with such a device in a simple manner.
  • Short-stroke electro-mechanical displacement transducers can advantageously be used.
  • the figure shows a working cylinder in which the device according to the invention is attached to the outside of the cylinder.
  • the device is connected to the piston rod via a driver attached to the piston rod.
  • the working cylinder shown in the figure consists essentially of a cylinder tube 4, a cylinder base 7, a cylinder cover 1 and a working piston guided in the cylinder tube 4, which is connected to a piston rod 36.
  • the cylinder cover 1 and the cylinder base 7 are clamped to the cylinder tube 4 via tie rods 5, 6 and nuts 2, 3.
  • a housing 8 is fastened to the circumference of the cylinder bottom and carries a tubular extension 28 on its side facing the cylinder cover 1.
  • a lever which is provided with a bearing eye and serves as a catch 35, is pushed onto the free end of the piston rod 36 and fixed on the piston rod 36 by means of a screw 37.
  • the driver 35 carries at its free end a tube 31 which runs parallel to the longitudinal axis of the cylinder and extends telescopically into the tubular extension 28 of the housing 8.
  • a screw 34 is screwed into the driver 35 in such a way that its free end region projects into the tube 31.
  • the eyelet-shaped end 32 of a tension spring 29 serving as an elastic element is suspended in a recess 33 of the screw 34.
  • a cylindrical holder 17, 20 is screwed into the other end of the tension spring 29 with its stepped region 20.
  • the holder 17, 20 has a guide ring 18 running in the circumferential direction and is arranged displaceably in a bore 21 of the housing 8 running parallel to the longitudinal axis of the cylinder.
  • the other end of the tension spring 29 is fixed by means of an adjusting screw 12, which is held in a cover 15 which closes the bore 21 at the end and is screwed into the holder 17, 20.
  • At least two pins 11, 14 are provided on the cover 15, which engage in corresponding recesses in the holder 17, 20, so that when the adjusting screw 12 is rotated, only a displacement movement of the holder 17, 20 in Longitudinal direction takes place.
  • a cap 10 is over the Cover 15 put over and fastened to the housing 8 by means of screws 9, 16, so that unintentional loosening of the cover 15 or unintentional adjustment of the adjusting screws 12, 13 is excluded.
  • a displacement transducer 22 On the side facing away from the spring chamber 21 of a wall 23 dividing the housing 8 there is a displacement transducer 22 which e.g. can be designed as a slide potentiometer, attached.
  • the displacement sensor 22 has an actuator 24, 26 which has a projection 26 which extends through a recess provided in the wall 23 in the direction of the tension spring 29.
  • the projection 26 bears on a turn of the tension spring 29 and is held on the turn by means of a relatively weak compression spring 25, which is supported on the housing of the displacement sensor 22 and acts on the actuator 24, 26 in the tensioning direction of the tension spring 29.
  • the housing 8 is closed by a cover 27.
  • An evaluation and control circuit (not shown) is provided, which is electrically connected on the one hand via a cable guide 19 to the displacement transducer 22 and on the other hand to a solenoid valve device (not shown) for ventilating the cylinder.
  • a wiper ring 30 is arranged on the free end of the tubular extension 28 of the housing 8, which abuts the tube 31.
  • the total travel of the tension spring 29 is equal to the distance traveled by the piston rod 36.
  • the actuator 24, 26 of the displacement transducer 22 has its tap not at the end of the tension spring 29 on the piston rod side, but is tapped at a turn near the holder 17, 20, the actuator 24, 26 travels a path which is equal to the reduced spring travel the tension spring 29. That is, the path covered by the actuator 26, 24 is reduced compared to the path covered by the piston rod 36.
  • a voltage is applied to the evaluation and control circuit, the size of which represents the distance traveled by the actuator 24, 26, which is reduced compared to the piston rod travel and proportional to the piston rod travel. This actual value is compared with the target value.
  • the solenoid valve device shuts off the working chamber of the working cylinder from the pressure medium source.
  • any piston position can be used determine or predetermine.
  • any other elastic element can of course be used instead of a tension spring.
  • the application of the device described above is not tied to the exemplary embodiment but can be used wherever the position of two parts which can be moved relative to one another is to be determined or predetermined.
  • the already existing spring can be taken in working cylinders that can be pressurized on one side or, in the case of valves, the valve spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Numerical Control (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
EP84105776A 1983-09-02 1984-05-21 Dispositif pour détecter la position d'un deuxième point variable par rapport à un premier point Expired EP0133871B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84105776T ATE36039T1 (de) 1983-09-02 1984-05-21 Einrichtung zur erfassung der relativ zu einem ersten punkt veraenderbaren position eines zweiten punktes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3331720A DE3331720A1 (de) 1983-09-02 1983-09-02 Einrichtung zur erfassung der relativ zu einem ersten punkt veraenderbaren position eines zweiten punktes
DE3331720 1983-09-02

Publications (3)

Publication Number Publication Date
EP0133871A2 true EP0133871A2 (fr) 1985-03-13
EP0133871A3 EP0133871A3 (en) 1986-03-26
EP0133871B1 EP0133871B1 (fr) 1988-07-27

Family

ID=6208103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105776A Expired EP0133871B1 (fr) 1983-09-02 1984-05-21 Dispositif pour détecter la position d'un deuxième point variable par rapport à un premier point

Country Status (5)

Country Link
US (1) US4566196A (fr)
EP (1) EP0133871B1 (fr)
JP (1) JPS6066101A (fr)
AT (1) ATE36039T1 (fr)
DE (2) DE3331720A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3640511A1 (de) * 1986-03-10 1987-09-24 Knaebel Horst Verfahren und vorrichtung zur ueberpruefung und/oder erfassung der masse, massaenderungen, positionen oder positionsaenderungen von werkstuecken, stellgliedern oder dgl.
DE3800887A1 (de) * 1987-02-05 1988-08-18 Kohn Dietmar Einrichtung zur messung der lageveraenderung eines elements
JPH0734321Y2 (ja) * 1987-05-27 1995-08-02 小松フォ−クリフト株式会社 シリンダにおけるセンサ−取付装置
DE4132114A1 (de) * 1991-09-26 1993-04-01 Siemens Ag Messaufnehmer fuer laengen- oder abstandsaenderungen
DE4240599B4 (de) * 1992-12-03 2006-06-14 Wabco Gmbh & Co.Ohg Einrichtung zum Erfassen von Relativbewegungen
DE19823529A1 (de) * 1998-05-26 1999-12-09 Mannesmann Rexroth Ag Wegbestimmungssystem
DE19910003A1 (de) * 1999-03-08 2000-09-14 Hbm Waegetechnik Gmbh Überlastsicherung für Aufnehmer mit Dehnungsmeßstreifen
DE102010014668A1 (de) 2010-04-12 2011-10-13 Samson Aktiengesellschaft Stellantrieb zum Stellen eines Stellglieds und Verfahren zum Erfassen der Stellung des Stellglieds

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR409047A (fr) * 1909-02-08 1910-04-11 Paul Louis Maurice Caron Méthodes et appareils pour déterminer et mesurer le jeu pris par les pièces mécaniques, bielles, pistons, vilebrequins, arbres, etc.
DE1000158B (de) * 1955-07-01 1957-01-03 Guenther Budnick Dipl Ing Einrichtung zur selbsttaetigen Messung von Laengen, insbesondere von Verformungen elastischer Koerper
NL254747A (fr) * 1959-08-10
US3160836A (en) * 1960-07-01 1964-12-08 Guerin Engineering Inc Electrohydraulic actuator
US3131608A (en) * 1961-10-25 1964-05-05 Yando Stephen Servomechanism
DE1601716A1 (de) * 1967-07-13 1971-01-14 Eckardt Ag J Pneumatisches Schubantriebselement
FR2216467A1 (fr) * 1973-10-09 1974-08-30 Poclain Sa
US3921302A (en) * 1974-06-26 1975-11-25 Edward D Wilkerson Brake pedal caliper
FR2410156A1 (fr) * 1977-11-29 1979-06-22 Seguy Claude Procede et dispositif de positionnement automatique d'un element mobile entre deux positions limites
US4195411A (en) * 1978-04-25 1980-04-01 Westinghouse Electric Corp. Remote gaging apparatus
DE3036485A1 (de) * 1980-09-27 1982-05-19 Bergwerksverband Gmbh, 4300 Essen Hydraulischer arbeitszylinder

Also Published As

Publication number Publication date
DE3473009D1 (en) 1988-09-01
ATE36039T1 (de) 1988-08-15
US4566196A (en) 1986-01-28
EP0133871B1 (fr) 1988-07-27
JPS6066101A (ja) 1985-04-16
DE3331720A1 (de) 1985-03-21
EP0133871A3 (en) 1986-03-26

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