EP0505297A1 - Hydraulischer Zylinder mit Vorrichtung zum Anzeigen der Kolbenstellung - Google Patents

Hydraulischer Zylinder mit Vorrichtung zum Anzeigen der Kolbenstellung Download PDF

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Publication number
EP0505297A1
EP0505297A1 EP92420084A EP92420084A EP0505297A1 EP 0505297 A1 EP0505297 A1 EP 0505297A1 EP 92420084 A EP92420084 A EP 92420084A EP 92420084 A EP92420084 A EP 92420084A EP 0505297 A1 EP0505297 A1 EP 0505297A1
Authority
EP
European Patent Office
Prior art keywords
drum
shaft
encoder
spring
housing
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
EP92420084A
Other languages
English (en)
French (fr)
Other versions
EP0505297B1 (de
Inventor
Jean-Paul Auvergne
Pierre Clavel
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.)
GEC Alsthom Societe DEtudes et de Montages SA
Original Assignee
D'etudes Et De Montages Sdem SA Ste
SDEM SOC ET MONTAGES
GEC Alsthom Societe DEtudes et de Montages SA
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 D'etudes Et De Montages Sdem SA Ste, SDEM SOC ET MONTAGES, GEC Alsthom Societe DEtudes et de Montages SA filed Critical D'etudes Et De Montages Sdem SA Ste
Publication of EP0505297A1 publication Critical patent/EP0505297A1/de
Application granted granted Critical
Publication of EP0505297B1 publication Critical patent/EP0505297B1/de
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
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/283—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using a cable wrapped on a drum and attached to the piston

Definitions

  • the present invention relates to double-acting hydraulic cylinders which are fitted with a servo system capable of imposing on their movable rod a succession of displacements in accordance with a programmable setpoint of extensions and contractions.
  • FIG. 1 of the drawing appended hereto The general arrangement of this type of jack has been schematically recalled in FIG. 1 of the drawing appended hereto.
  • the reference 1 designates the end of the fixed cylinder inside which the piston slides axially, the rear face of the latter being made integral with a flexible link 2 through a double articulated fastener.
  • the opposite end of this link 2 is wound in a helical groove made in the wall of a drive drum 3.
  • the latter is wedged on a transverse shaft 4 which, on either side of said drum, carries an absolute encoder 5 connected to an electronic management unit, and a spiral spring 6 for keeping the link 22 constant under tension, which spring is housed in a housing 7 fixed laterally to the casing 8 which supports the shaft 4.
  • the invention essentially consists in producing the drive drum in the form of a hollow cylindrical wall provided with a single transverse flange which is offset in the direction of one of the ends of said wall, so as to define in said drum a free space capable of forming housing for at least one of the two driven elements associated with it.
  • fig. 1 is an axial section recalling the general arrangement of a slave rod cylinder produced in accordance with the prior art.
  • Fig. 2 is a perspective view showing the drive drum of a jack established in accordance with the present invention.
  • Fig. 3, 4 and 5 are axial sections illustrating three different embodiments of the invention.
  • This drum 10 comprises a hollow cylindrical wall 10 a whose outer surface is hollowed out by a groove 10 b with a helical profile, while its inner surface is connected to a transverse flange 10 c pierced axially at 10 d . It is essential to observe that this flange 10 c is offset with respect to the median plane of the cylindrical wall 10 a , so as to be in fact disposed at one of the edges thereof.
  • this drum 10 is fixed, inside a casing 11, on a shaft 12 introduced through its axial opening 10 d .
  • the cylindrical wall 10 a cooperates with two bearings 13 held inside the aforementioned casing; a reinforcement bearing 14 has also been provided interposed between a shoulder of the cover 11b of the casing 11 and the end of a socket 15 keyed onto the shaft 12.
  • a longitudinal bore capable of receiving a pin 16 forming a mooring point for one of the ends of a spiral spring 17, the opposite end thereof being made integral with a pin 18 retained in a housing formed in an annular partition of the cover 11 c .
  • the shaft 12 crosses the bottom 11 a of the casing 11 by means of a seal 19 and, beyond this bottom, is joined by a flexible anti-vibration connection 20 to the shaft of an absolute encoder 21 mounted in an extension of the aforementioned background.
  • Fig. 4 illustrates a variant embodiment of the invention wherein it is the encoder 21 which is accommodated inside the drum 10, while the spring 17 is placed in a housing 22 reported laterally against the bottom 11a of the casing 11.
  • the mounting of this spring 17 is carried out in the same manner as in FIG. 3, in the sense that one of its ends is attached to a pin 16 secured to a socket 15 ca lé on the shaft 12, while the pin 18 on which the opposite end moored is retained in the periphery of the housing 22.
  • the shaft 12 is supported by a bearing 11 d and a bearing 14, both mounted in the bottom 11 a of the housing 11.
  • the drum 10 which contains the encoder 21, linked by a flexible connector 20 to said shaft 12, is supported by two bearings 13 interposed between its inner face and the wall of a fixed bell or envelope 23 fixed to the cover 11b of the casing 11.
  • the encoder 21 is here effectively protected from the external environment by virtue of its accommodation in the drum 10.
  • the drum 10, supported in rotation by two outer bearings 13, contains both the encoder 21 and the spring 17, arranged concentrically with respect to each other.
  • the shaft common to the drum 10, the spring 17 and the encoder 21 is constituted by a hollow cylindrical piece 12 'which, supported in rotation by the bottom 11 a and the cover 11 b of the casing 11 by means of a bearing 14, defines with the wall 10 a of the drum an outer annular space containing the spring 17. It is in the interior space of this part 12 ′ that the encoder 21 is engaged, the shaft of which is joined to said part by a flexible connector 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
EP19920420084 1991-03-22 1992-03-20 Hydraulischer Zylinder mit Vorrichtung zum Anzeigen der Kolbenstellung Expired - Lifetime EP0505297B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103747A FR2674294B1 (fr) 1991-03-22 1991-03-22 Verin hydraulique a positionnement de tige mobile asservi.
FR9103747 1991-03-22

Publications (2)

Publication Number Publication Date
EP0505297A1 true EP0505297A1 (de) 1992-09-23
EP0505297B1 EP0505297B1 (de) 1995-05-10

Family

ID=9411202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920420084 Expired - Lifetime EP0505297B1 (de) 1991-03-22 1992-03-20 Hydraulischer Zylinder mit Vorrichtung zum Anzeigen der Kolbenstellung

Country Status (4)

Country Link
EP (1) EP0505297B1 (de)
DE (1) DE69202375T2 (de)
ES (1) ES2072120T3 (de)
FR (1) FR2674294B1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741400A1 (fr) * 1995-11-22 1997-05-23 Valeo Verin hydraulique muni de moyens de detection de la position axiale de son piston
WO2000023717A1 (en) * 1998-10-20 2000-04-27 Control Products, Inc. Precision sensor for a hydraulic cylinder
FR2794196A1 (fr) 1999-05-31 2000-12-01 Pierre Clavel Dispositif de mesure et affichage continu de la position ou controle de position d'une tige de verin
US6694861B2 (en) 1998-10-19 2004-02-24 Control Products Inc. Precision sensor for a hydraulic cylinder
EP1443218A3 (de) * 1998-10-20 2004-11-17 Control Products Inc. Präzisionssensor eines hydraulischen Stellgliedes
US6866545B2 (en) 2003-03-10 2005-03-15 Control Products, Inc., (Us) Electrical cordset with integral signal conditioning circuitry
US7093361B2 (en) 2002-01-23 2006-08-22 Control Products, Inc. Method of assembling an actuator with an internal sensor
US7197974B2 (en) 2004-01-15 2007-04-03 Control Products Inc. Position sensor
CN100359190C (zh) * 2003-08-07 2008-01-02 北京欧特科新技术有限公司 一种内置式液压油缸位移传感器
US7609055B2 (en) 2004-07-21 2009-10-27 Control Products, Inc. Position sensing device and method
EP1793478A3 (de) * 2005-12-05 2010-06-02 SICK STEGMANN GmbH Stellvorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107218267B (zh) * 2017-06-01 2019-06-21 武汉船用机械有限责任公司 一种用于检测液压油缸位移的装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121504A (en) * 1977-01-21 1978-10-24 Inovec, Inc. Cylinder positioning systems
US4286386A (en) * 1977-09-06 1981-09-01 Long Irvin E Electro-mechanical displacement measuring device
DE3106156A1 (de) * 1981-02-19 1982-09-09 Pohle + Rehling Gmbh, 4353 Oer-Erkenschwick Verfahren zur ueberwachung der streblage und geraet zur durchfuehrung des verfahrens
DE3229945A1 (de) * 1982-08-12 1984-02-16 Mannesmann Rexroth GmbH, 8770 Lohr Vorrichtung zur anzeige des kolbenhubes bei einem hydraulischen zylinder
US4969274A (en) * 1988-10-11 1990-11-13 Chang Fu Rong Displacement measuring and remote control apparatus with a sheave and a flexible belt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121504A (en) * 1977-01-21 1978-10-24 Inovec, Inc. Cylinder positioning systems
US4286386A (en) * 1977-09-06 1981-09-01 Long Irvin E Electro-mechanical displacement measuring device
DE3106156A1 (de) * 1981-02-19 1982-09-09 Pohle + Rehling Gmbh, 4353 Oer-Erkenschwick Verfahren zur ueberwachung der streblage und geraet zur durchfuehrung des verfahrens
DE3229945A1 (de) * 1982-08-12 1984-02-16 Mannesmann Rexroth GmbH, 8770 Lohr Vorrichtung zur anzeige des kolbenhubes bei einem hydraulischen zylinder
US4969274A (en) * 1988-10-11 1990-11-13 Chang Fu Rong Displacement measuring and remote control apparatus with a sheave and a flexible belt

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741400A1 (fr) * 1995-11-22 1997-05-23 Valeo Verin hydraulique muni de moyens de detection de la position axiale de son piston
US6694861B2 (en) 1998-10-19 2004-02-24 Control Products Inc. Precision sensor for a hydraulic cylinder
WO2000023717A1 (en) * 1998-10-20 2000-04-27 Control Products, Inc. Precision sensor for a hydraulic cylinder
US6234061B1 (en) 1998-10-20 2001-05-22 Control Products, Inc. Precision sensor for a hydraulic cylinder
EP1443218A3 (de) * 1998-10-20 2004-11-17 Control Products Inc. Präzisionssensor eines hydraulischen Stellgliedes
FR2794196A1 (fr) 1999-05-31 2000-12-01 Pierre Clavel Dispositif de mesure et affichage continu de la position ou controle de position d'une tige de verin
US7093361B2 (en) 2002-01-23 2006-08-22 Control Products, Inc. Method of assembling an actuator with an internal sensor
US6866545B2 (en) 2003-03-10 2005-03-15 Control Products, Inc., (Us) Electrical cordset with integral signal conditioning circuitry
CN100359190C (zh) * 2003-08-07 2008-01-02 北京欧特科新技术有限公司 一种内置式液压油缸位移传感器
US7197974B2 (en) 2004-01-15 2007-04-03 Control Products Inc. Position sensor
US7609055B2 (en) 2004-07-21 2009-10-27 Control Products, Inc. Position sensing device and method
EP1793478A3 (de) * 2005-12-05 2010-06-02 SICK STEGMANN GmbH Stellvorrichtung

Also Published As

Publication number Publication date
FR2674294B1 (fr) 1993-12-17
FR2674294A1 (fr) 1992-09-25
ES2072120T3 (es) 1995-07-01
DE69202375D1 (de) 1995-06-14
DE69202375T2 (de) 1995-10-05
EP0505297B1 (de) 1995-05-10

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