FR2619870B1 - HYDRAULIC CYLINDER WITH MOVABLE ROD POSITIONING - Google Patents

HYDRAULIC CYLINDER WITH MOVABLE ROD POSITIONING

Info

Publication number
FR2619870B1
FR2619870B1 FR8712106A FR8712106A FR2619870B1 FR 2619870 B1 FR2619870 B1 FR 2619870B1 FR 8712106 A FR8712106 A FR 8712106A FR 8712106 A FR8712106 A FR 8712106A FR 2619870 B1 FR2619870 B1 FR 2619870B1
Authority
FR
France
Prior art keywords
tie
drum
piston
groove
oriented
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.)
Expired - Fee Related
Application number
FR8712106A
Other languages
French (fr)
Other versions
FR2619870A1 (en
Inventor
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.)
MONTAGES ET
Original Assignee
MONTAGES ET
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 MONTAGES ET filed Critical MONTAGES ET
Priority to FR8712106A priority Critical patent/FR2619870B1/en
Priority to EP88420290A priority patent/EP0305306B1/en
Priority to DE8888420290T priority patent/DE3860698D1/en
Priority to AT88420290T priority patent/ATE57000T1/en
Publication of FR2619870A1 publication Critical patent/FR2619870A1/en
Application granted granted Critical
Publication of FR2619870B1 publication Critical patent/FR2619870B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

1. Hydraulic jack with servo-controlled rodpositioning, of the type comprising a shaft (12) which is oriented transversely to the longitudinal axis of the body (1) and which bears, besides a spiral return spring (24) and an absolute encoder (23) associated with a control automat, a central drive drum (13) controlled by a supple tie (14) which is attached to the piston (5) and which winds in a helicoidal groove (13a) made in the wall of said drum, characterized in that the free end of the tie (14) is rendered fast with the rear face of the piston (5) by means of a fastener (16) comprising a tab (17) which is shaped to ensure fixation of the free end of the tie and which pivots freely on a shaft (18) oriented longitudinally with respect to said piston and supported by an ear (19_a) of a sleeve (19) which itself pivots freely on a pin (21) axially plugged in the rear face mentioned above, this double-articulation system enabling the tie, as it winds and unwinds on the drum, always to remain oriented in a plane parallel to the axis of the body of the jack as well as to the plane passing through all the groove bottoms (13_a) of the drum, without any extension or contraction of the length, whatever the winding of this tie in said groove.
FR8712106A 1987-08-27 1987-08-27 HYDRAULIC CYLINDER WITH MOVABLE ROD POSITIONING Expired - Fee Related FR2619870B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8712106A FR2619870B1 (en) 1987-08-27 1987-08-27 HYDRAULIC CYLINDER WITH MOVABLE ROD POSITIONING
EP88420290A EP0305306B1 (en) 1987-08-27 1988-08-25 Hydraulic actuator with piston rod positioning means
DE8888420290T DE3860698D1 (en) 1987-08-27 1988-08-25 HYDRAULIC CYLINDER WITH DEVICE FOR INDICATING PISTON LIFT.
AT88420290T ATE57000T1 (en) 1987-08-27 1988-08-25 HYDRAULIC CYLINDER WITH PISTON TRAVEL INDICATOR DEVICE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8712106A FR2619870B1 (en) 1987-08-27 1987-08-27 HYDRAULIC CYLINDER WITH MOVABLE ROD POSITIONING

Publications (2)

Publication Number Publication Date
FR2619870A1 FR2619870A1 (en) 1989-03-03
FR2619870B1 true FR2619870B1 (en) 1992-11-13

Family

ID=9354527

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8712106A Expired - Fee Related FR2619870B1 (en) 1987-08-27 1987-08-27 HYDRAULIC CYLINDER WITH MOVABLE ROD POSITIONING

Country Status (4)

Country Link
EP (1) EP0305306B1 (en)
AT (1) ATE57000T1 (en)
DE (1) DE3860698D1 (en)
FR (1) FR2619870B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741400B1 (en) * 1995-11-22 1998-01-09 Valeo HYDRAULIC CYLINDER PROVIDED WITH MEANS FOR DETECTING THE AXIAL POSITION OF ITS PISTON
FR2794196B1 (en) 1999-05-31 2002-04-26 Pierre Clavel DEVICE FOR MEASURING AND CONTINUOUSLY DISPLAYING THE POSITION OR POSITION CONTROL OF A CYLINDER ROD
GB0101180D0 (en) * 2001-01-17 2001-02-28 Parkhouse Country Estates Ltd Platforms for use in transporters
CN100359190C (en) * 2003-08-07 2008-01-02 北京欧特科新技术有限公司 Built-in hydraulic oil-cylinder displacement sensor
CH704909A2 (en) * 2011-05-09 2012-11-15 Peter A Mueller Knitting cylinders with sensor.
CN107218267B (en) * 2017-06-01 2019-06-21 武汉船用机械有限责任公司 It is a kind of for detecting the device of hydraulic cylinder displacement

Family Cites Families (6)

* 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 (en) * 1981-02-19 1982-09-09 Pohle + Rehling Gmbh, 4353 Oer-Erkenschwick Method of monitoring the face position and device for carrying out the method
DE3205773A1 (en) * 1982-02-18 1983-08-25 Vdo Adolf Schindling Ag, 6000 Frankfurt Pneumatic actuator
DE3229945C2 (en) * 1982-08-12 1986-06-05 Mannesmann Rexroth GmbH, 8770 Lohr Device for displaying the piston stroke in a hydraulic cylinder
DE8507512U1 (en) * 1985-03-14 1985-05-23 Knorr-Bremse GmbH, 8000 München Position indicator for a piston

Also Published As

Publication number Publication date
ATE57000T1 (en) 1990-10-15
FR2619870A1 (en) 1989-03-03
DE3860698D1 (en) 1990-10-31
EP0305306A1 (en) 1989-03-01
EP0305306B1 (en) 1990-09-26

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Legal Events

Date Code Title Description
CA Change of address
CD Change of name or company name
TP Transmission of property
ST Notification of lapse