EP0866306A1 - Capteur de déplacement pour un assemblage de cylindre-piston - Google Patents

Capteur de déplacement pour un assemblage de cylindre-piston Download PDF

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Publication number
EP0866306A1
EP0866306A1 EP98102493A EP98102493A EP0866306A1 EP 0866306 A1 EP0866306 A1 EP 0866306A1 EP 98102493 A EP98102493 A EP 98102493A EP 98102493 A EP98102493 A EP 98102493A EP 0866306 A1 EP0866306 A1 EP 0866306A1
Authority
EP
European Patent Office
Prior art keywords
friction wheel
piston rod
measuring system
housing
cylinder
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
EP98102493A
Other languages
German (de)
English (en)
Other versions
EP0866306B1 (fr
Inventor
Hans Dipl.-Ing. Nussbaum
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.)
Otto Nussbaum GmbH and Co KG
Original Assignee
Otto Nussbaum GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otto Nussbaum GmbH and Co KG filed Critical Otto Nussbaum GmbH and Co KG
Publication of EP0866306A1 publication Critical patent/EP0866306A1/fr
Application granted granted Critical
Publication of EP0866306B1 publication Critical patent/EP0866306B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a position measuring system for cylinder-piston units by means of a friction wheel that rolls on the piston rod and whose rotation is detected by a sensor and as a measure for the path or position of the piston rod is passed on.
  • Such measuring systems allow the adjustment path in a simple manner of cylinder-piston units and thus, for example, the Height of a lifting platform. the angle of inclination of a tilting device or the like to determine
  • the friction wheel is in contact with the piston rod, so that a translatory movement of the piston rod is converted into a rotary of the friction wheel.
  • This object is achieved in that the friction wheel is arranged in a chamber by on the piston rod adjacent seals are sealed from the environment.
  • one of the seals on the piston rods prevents Impurities that are on the piston rod into the Chamber can penetrate.
  • one of the seals can be the friction wheel and the sensitive one Isolate the sensor against the excess pressure in the cylinder space, so that no additional and usually unreliable sealing the filigree elements of the measuring system is necessary.
  • Chamber of the displacement measuring system expediently at least partially arranged at one end of a plug-in or screw-in housing is.
  • the measuring system can then be used with this housing Simply attach to the cylinder-piston unit. This gives easy maintenance of the measuring system.
  • the housing should achieve sufficient contact pressure continue to a pressure device for pressing the friction wheel have the piston rod.
  • This can advantageously be realized in this way be that the friction wheel is mounted in a piston which is radial to Piston rod slidably guided in the housing and through a Spring element is acted upon.
  • the housing continues the electronics for the from the transmitter contains emitted signals, forms the measuring system a compact, clear, easy to use and easy to use waiting complete unit. Recommended for an even more compact design it is, in addition, the sensor inside the friction wheel to arrange and train it as an incremental measuring system.
  • the cheapest place for positioning the friction wheel has been one Guide bushing for the piston rod, especially the one already there end guide bushing of the cylinder proved that existing seals can be used here and at the same time a reduction in the piston stroke is avoided.
  • To the Connection of the measuring system then has a guide bush corresponding, preferably radially extending bore.
  • cylinder-piston units are used simultaneously for one stroke or Tilting device used, it is recommended on more than one or all of these units an inventive measuring system use, so that there is an overall system that is redundant is or for synchronization, especially for synchronization control, the cylinder-piston units can be used.
  • the cylinder-piston unit shown in Figure 1 has a cylinder 1 on at one end by means of a base plate 2 a support frame not shown can be hinged. On the the bottom plate 2 opposite side of the cylinder 1 protrudes him a piston rod 3 which can be moved in a straight line. At the end of the piston rod 3 located outside the cylinder 1 there is a head part 4, via which the piston rod 3 to be moved Act elements of a lifting or swiveling device can. At the outlet end of the piston rod 3, the cylinder 1 is through a guide bush 5 completed.
  • friction wheel 7 carries.
  • This friction wheel is in one from areas of a housing 8 of the displacement measuring system 6 and the guide bush 5 chamber formed.
  • the chamber is through cylinder side Seals 5a, 5b of the guide bush 5 against the excess pressure sealed in cylinder 1.
  • On the head part 4 facing The end of the guide bush 5 is the chamber by another Seal 5c against the ingress of contaminants from protected outside.
  • the measuring system 6 according to FIG. 1 is partially cut open.
  • the parts of the displacement measuring system 6 are located in the screw-in housing 8 or are held together by this.
  • the Screw-in housing 8 has on its piston rod 3 facing Page a thread 9 with which it is in a corresponding counter thread is screwed into the guide bush 5.
  • the intrusion of pollution from the environment prevents it from entering the Groove 10 O-ring to be inserted.
  • After screwing in the housing 8 it is secured by a lock nut 11 in the guide bush 5.
  • the housing 8 is approximately L-shaped, with one leg the friction wheel 7, a sensor 12 and a friction wheel and sensor bearing 13 are arranged. This leg is right-angled the second part of the housing 8, in the interior 14th there is space for evaluation electronics (not shown). An outside wall this interior 14 forms a liner Seal 15 a cover 16th
  • the friction wheel 7, which partially comes out of the housing 8, is now essential protrudes.
  • the ratio between located in the housing 8 and protruding portion of the friction wheel 7 arises by shifting of the friction wheel according to the distance between the housing 8 and the piston rod 3, so that the friction wheel 7 is always tight enough bears against the piston rod 3 by a sufficient for its rotation To achieve rolling friction.
  • Moving is done by that the friction wheel 7 is mounted on the friction wheel bearing 13, which in turn is pushed forward in the housing 8 by a compression spring 17
  • the compression spring 17 runs perpendicular to the piston rod 3 and is between the outer wall furthest from the piston rod 3 of the housing 8 and friction wheel bearing 13 braced.
  • the friction wheel bearing 13 acts as a piston in the rear area the corresponding cylindrical housing 8, while in the front area a recess for receiving the friction wheel 7 Has.
  • the friction wheel 7 has a flat tread and one in the direction of Axis of rotation adjacent to it, approximately hemispherical area, which forms the flying storage of the friction wheel.
  • the sensor 12 Inside the Friction wheels 7 is the sensor 12, the rotation of the friction wheel and as a measure of the path or the position of the Piston rod to be installed in a channel 19 of the friction wheel bearing 13 Cable to the evaluation electronics to be accommodated in the interior 14 forwards.
  • FIG. 3 corresponds the one previously described except for the fact that the interior for the evaluation electronics 14 'here not perpendicular to the rest of the housing 8 'is arranged, but in its extension This results in a longer and narrower design of the Position measuring system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
EP98102493A 1997-03-19 1998-02-13 Capteur de déplacement pour un assemblage de cylindre-piston Expired - Lifetime EP0866306B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29704877U 1997-03-19
DE29704877U DE29704877U1 (de) 1997-03-19 1997-03-19 Wegmeßsystem für Zylinderkolbenaggregate

Publications (2)

Publication Number Publication Date
EP0866306A1 true EP0866306A1 (fr) 1998-09-23
EP0866306B1 EP0866306B1 (fr) 2004-04-28

Family

ID=8037647

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98102493A Expired - Lifetime EP0866306B1 (fr) 1997-03-19 1998-02-13 Capteur de déplacement pour un assemblage de cylindre-piston

Country Status (4)

Country Link
EP (1) EP0866306B1 (fr)
AT (1) ATE265669T1 (fr)
DE (2) DE29704877U1 (fr)
ES (1) ES2218722T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19823529A1 (de) * 1998-05-26 1999-12-09 Mannesmann Rexroth Ag Wegbestimmungssystem
EP1398292A1 (fr) * 2002-09-13 2004-03-17 MAHA Maschinenbau Haldenwang GmbH & Co. KG Dispositif de commande pour plates-formes de levage
DE102010005336A1 (de) 2010-01-21 2011-07-28 SITEMA GmbH & Co. KG, 76135 Vorrichtung und Verfahren zum Erfassen einer Bewegungsgröße eines magnetisierbaren Objekts
EP3301230A1 (fr) * 2016-09-30 2018-04-04 Caterpillar Inc. Agencement d'actionneur hydraulique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29715008U1 (de) 1997-08-22 1997-10-02 Otto Nussbaum GmbH & Co. KG, 77694 Kehl Transport- und Lagereinrichtung, insbesondere für Kraftfahrzeuge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217942A1 (de) * 1981-05-21 1982-12-09 Nippon Joucomatic Co., Ltd., Tokyo Stellungsfuehler fuer einen zylindrischen stab
DE3119829A1 (de) * 1981-05-19 1982-12-16 H. Kuhnke Gmbh Kg, 2427 Malente Messsystem zum erfassen von positionen der kolbenstange einer kolben-zylinder-einheit
US4646011A (en) * 1983-12-17 1987-02-24 Vdo Adolf Schindling Ag Electronic angular position transmitter with toroidal core and rotatable magnet
JPH05149734A (ja) * 1991-11-28 1993-06-15 Mitsui Eng & Shipbuild Co Ltd 表面粗さ計測センサの取付け構造
US5488860A (en) * 1993-12-29 1996-02-06 E-Systems, Inc. Apparatus for determining the position of a piston in a fluidic actuator
DE4445122A1 (de) * 1994-12-17 1996-06-20 Kemptener Gmbh Maschf Kolben-Zylinder-Einheit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3119829A1 (de) * 1981-05-19 1982-12-16 H. Kuhnke Gmbh Kg, 2427 Malente Messsystem zum erfassen von positionen der kolbenstange einer kolben-zylinder-einheit
DE3217942A1 (de) * 1981-05-21 1982-12-09 Nippon Joucomatic Co., Ltd., Tokyo Stellungsfuehler fuer einen zylindrischen stab
US4646011A (en) * 1983-12-17 1987-02-24 Vdo Adolf Schindling Ag Electronic angular position transmitter with toroidal core and rotatable magnet
JPH05149734A (ja) * 1991-11-28 1993-06-15 Mitsui Eng & Shipbuild Co Ltd 表面粗さ計測センサの取付け構造
US5488860A (en) * 1993-12-29 1996-02-06 E-Systems, Inc. Apparatus for determining the position of a piston in a fluidic actuator
DE4445122A1 (de) * 1994-12-17 1996-06-20 Kemptener Gmbh Maschf Kolben-Zylinder-Einheit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 536 (P - 1620) 27 September 1993 (1993-09-27) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19823529A1 (de) * 1998-05-26 1999-12-09 Mannesmann Rexroth Ag Wegbestimmungssystem
EP1398292A1 (fr) * 2002-09-13 2004-03-17 MAHA Maschinenbau Haldenwang GmbH & Co. KG Dispositif de commande pour plates-formes de levage
DE102010005336A1 (de) 2010-01-21 2011-07-28 SITEMA GmbH & Co. KG, 76135 Vorrichtung und Verfahren zum Erfassen einer Bewegungsgröße eines magnetisierbaren Objekts
EP3301230A1 (fr) * 2016-09-30 2018-04-04 Caterpillar Inc. Agencement d'actionneur hydraulique
US10724210B2 (en) 2016-09-30 2020-07-28 Caterpillar Inc. Hydraulic actuator arrangement

Also Published As

Publication number Publication date
EP0866306B1 (fr) 2004-04-28
ES2218722T3 (es) 2004-11-16
ATE265669T1 (de) 2004-05-15
DE29704877U1 (de) 1997-04-30
DE59811255D1 (de) 2004-06-03

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