EP0305306A1 - Hydraulischer Zylinder mit Vorrichtung zum Anzeigen des Kolbenhubes - Google Patents

Hydraulischer Zylinder mit Vorrichtung zum Anzeigen des Kolbenhubes Download PDF

Info

Publication number
EP0305306A1
EP0305306A1 EP88420290A EP88420290A EP0305306A1 EP 0305306 A1 EP0305306 A1 EP 0305306A1 EP 88420290 A EP88420290 A EP 88420290A EP 88420290 A EP88420290 A EP 88420290A EP 0305306 A1 EP0305306 A1 EP 0305306A1
Authority
EP
European Patent Office
Prior art keywords
piston
shaft
tie
drum
cheeks
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
EP88420290A
Other languages
English (en)
French (fr)
Other versions
EP0305306B1 (de
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.)
D'etudes Et De Montages Sdem SA Ste
Original Assignee
D'etudes Et De Montages Sdem SA Ste
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 filed Critical D'etudes Et De Montages Sdem SA Ste
Priority to AT88420290T priority Critical patent/ATE57000T1/de
Publication of EP0305306A1 publication Critical patent/EP0305306A1/de
Application granted granted Critical
Publication of EP0305306B1 publication Critical patent/EP0305306B1/de
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
    • F15B15/283—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 and it relates more particularly (because it is in this case that its application seems to be of most interest), but not exclusively, long-stroke and high-power cylinders .
  • US-A-4 121 504 had proposed having a shaft at the end of the cylinder cylinder which is oriented transversely to the longitudinal axis thereof and which carries, in addition to a spiral return spring and an absolute encoder associated with a control automaton, a central drive member controlled by a flexible link attached to the piston of the jack. It is understood that the encoder thus driven gives a perfectly precise indication of the position of the piston.
  • the main object of the present invention is to allow a cylinder of the aforementioned type to be made, the control of which remains perfectly precise whatever the stroke of the piston, even when this stroke is very long and reaches several meters.
  • the invention also relates to an actuator of the aforementioned type which is of robust and simple construction, while being able to be very easily maintained in operating condition throughout its use over time.
  • FIG. 1 shows in 1 the cylindrical body of a double-acting hydraulic cylinder, supplied by two end pipes 2 and 3.
  • the movable rod which carries the piston 5, and in 6 and 7 the two flanges terminals of which one (in the case considered that referenced 6), crossed by the rod 4, is used for fixing the assembly against a fixed support such as 8, while against the other 7 is normally applied the transverse bottom which closes the body 1 tightly.
  • this bottom is replaced by a cylindrical casing 9 oriented co-axially with the body 1, and which is provided with two end flanges, one of which 9 a is fitted against the flange 7 while that the other 9 b receives the above-mentioned fund, referenced 10.
  • the invention is of course applicable to cylinders in which the body 1 is supported, not by an end flange 6, but by pins such as those shown in 11 in FIG. 1, or by a perforated fastener of the kind shown in 11 ′ in FIG. 2, which fastener, made integral with the flange 9b of the casing 9, is then shaped to play the role of closing bottom.
  • the casing 9 contains a shaft 12 oriented transversely to the axis of the body 1 and on the central part of which is keyed a drum 13.
  • the periphery of the latter is hollowed out by a groove 13 a with helical profile for the emptying regular of a flexible link formed by an inextensible cable 14, one end of which is fixed to one of the cheeks of said drum by means of a plate 15 (fig. 4), while the opposite end is made integral with the rear face of the piston 5 by means of a fastener 16 with double articulation.
  • Fig. 5 and 6 illustrate in detail the arrangement of the fastener 16.
  • the latter comprises a lug 17 shaped to secure the free end of the cable 14; this tab 17 pivots freely on a shaft 18 oriented longitudinally relative to the piston 5 and to the body 1 and itself supported by the ear 19 has a sleeve 19, which contains two bearings 20 which ensures the free rotation of said sleeve 19 on an axis 21 inserted axially in the rear face of the piston 5.
  • the double articulation system of the fastener 16 allows the cable 14, as it is wound up and unwound on the drum 13, to always remain oriented in a plane parallel to the longitudinal axis of the jack as well as the plane passing through all of the groove bottoms 13a of the drum 13, without any length extension or contraction, whatever the winding of said cable in the groove 13a. It will further be observed that this fastening system 16 completely frees the cable 14 of a possible rotation of the piston 5 inside the body 1 of the jack.
  • the transverse shaft 12 is mounted in two bearings 22 which it passes axially to cooperate on one side with the movable part of an absolute encoder 23, on the other with a tension spring 24.
  • Each bearing 22 is supported by a sleeve 25 which is made integral with the casing 9 and which contains a sealing part 26.
  • each part 26 is equipped with two annular seals 27 which are applied against the periphery of the shaft 12 and which are separated from each other by a radial bore 26 a associated with a plug 26 b for the control of sealing.
  • An external seal 28 is opposed to any communication along the internal wall of each socket 25.
  • the input shaft of the absolute encoder 23 is connected to the end of the shaft 12 by means of a flexible anti-vibration connector 29 (fig. 3).
  • This encoder 23 is of course associated with an automaton (not shown), arranged to control the distributor which ensures the actuation of the piston 5 in either direction, this automaton itself being placed under the dependence of a computer for controlling the positioning of said piston according to the planned instruction.
  • the opposite projecting end of the shaft 12 enters an opening box 30 (fig. 7), closed by a removable cover 31.
  • the spring 24 consists of a blade wound in a spiral and held between two cheeks 32, the central part of which cooperates with bearings 33 bearing against a hub 34, which is keyed onto the considered end of the shaft 12.
  • an annular flange 36 whose outer edge is cut out with radial notches capable of being engaged on teeth 30 a provided against the internal wall of the housing 30. The cooperation of these notches and of these teeth 30 a ensures the angular immobilization of the cheeks 32 inside the housing 30.
  • the inner end of the leaf spring 24 is secured to the hub 34 integral with the shaft 12, while the outer end is fixed to a small lever 37 (fig. 8) freely pivotally engaged on a tubular spacer 38 carried by one of the bolts 39 which join the two cheeks 32 to each other.
  • the assembly formed by the spring 24, the cheeks 32 and the hub 34 constitutes a kind of cartridge capable of being very easily assembled and disassembled with a view to its replacement.
  • the constant action of the spiral spring 34 on the shaft 12 ensures the permanent tension of the cable 14 during reciprocating movements of the piston 5 of the jack, radically avoiding any drive defect of the encoder 23, which can thus ensure a perfect identification precise position of said piston.
  • the invention lends itself particularly well to equipping existing jacks since it suffices to adapt the casing 9 to the body thereof instead of the bottom which usually closes this body.

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)
EP88420290A 1987-08-27 1988-08-25 Hydraulischer Zylinder mit Vorrichtung zum Anzeigen des Kolbenhubes Expired - Lifetime EP0305306B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420290T ATE57000T1 (de) 1987-08-27 1988-08-25 Hydraulischer zylinder mit vorrichtung zum anzeigen des kolbenhubes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8712106A FR2619870B1 (fr) 1987-08-27 1987-08-27 Verin hydraulique a positionnement de tige mobile asservi
FR8712106 1987-08-27

Publications (2)

Publication Number Publication Date
EP0305306A1 true EP0305306A1 (de) 1989-03-01
EP0305306B1 EP0305306B1 (de) 1990-09-26

Family

ID=9354527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420290A Expired - Lifetime EP0305306B1 (de) 1987-08-27 1988-08-25 Hydraulischer Zylinder mit Vorrichtung zum Anzeigen des Kolbenhubes

Country Status (4)

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

Cited By (5)

* 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
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
WO2002057112A1 (en) * 2001-01-17 2002-07-25 Parkhouse Country Estates Limited PéATFORMS FOR USE IN TRANSPORTERS
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
WO2012151708A1 (de) * 2011-05-09 2012-11-15 Mueller Peter A Wirkzylindersensor

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 (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 (de) * 1981-02-19 1982-09-09 Pohle + Rehling Gmbh, 4353 Oer-Erkenschwick Verfahren zur ueberwachung der streblage und geraet zur durchfuehrung des verfahrens
DE3205773A1 (de) * 1982-02-18 1983-08-25 Vdo Adolf Schindling Ag, 6000 Frankfurt Pneumatisches stellglied
DE3229945A1 (de) * 1982-08-12 1984-02-16 Mannesmann Rexroth GmbH, 8770 Lohr Vorrichtung zur anzeige des kolbenhubes bei einem hydraulischen zylinder
DE8507512U1 (de) * 1985-03-14 1985-05-23 Knorr-Bremse GmbH, 8000 München Positionsanzeigevorrichtung für einen Kolben

Patent Citations (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 (de) * 1981-02-19 1982-09-09 Pohle + Rehling Gmbh, 4353 Oer-Erkenschwick Verfahren zur ueberwachung der streblage und geraet zur durchfuehrung des verfahrens
DE3205773A1 (de) * 1982-02-18 1983-08-25 Vdo Adolf Schindling Ag, 6000 Frankfurt Pneumatisches stellglied
DE3229945A1 (de) * 1982-08-12 1984-02-16 Mannesmann Rexroth GmbH, 8770 Lohr Vorrichtung zur anzeige des kolbenhubes bei einem hydraulischen zylinder
DE8507512U1 (de) * 1985-03-14 1985-05-23 Knorr-Bremse GmbH, 8000 München Positionsanzeigevorrichtung für einen Kolben

Cited By (5)

* 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
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
WO2002057112A1 (en) * 2001-01-17 2002-07-25 Parkhouse Country Estates Limited PéATFORMS FOR USE IN TRANSPORTERS
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
WO2012151708A1 (de) * 2011-05-09 2012-11-15 Mueller Peter A Wirkzylindersensor

Also Published As

Publication number Publication date
DE3860698D1 (de) 1990-10-31
ATE57000T1 (de) 1990-10-15
EP0305306B1 (de) 1990-09-26
FR2619870B1 (fr) 1992-11-13
FR2619870A1 (fr) 1989-03-03

Similar Documents

Publication Publication Date Title
FR2497536A1 (fr) Ensemble de fermeture de porte
EP0305306B1 (de) Hydraulischer Zylinder mit Vorrichtung zum Anzeigen des Kolbenhubes
FR2769066A1 (fr) Ensemble de soupape
EP1586801B1 (de) Verfahren und Vorrichtung zum Setzen eines Rohrabzweigstückes an eine Rohrleitung
EP2280210A1 (de) Abzweigungsvorrichtung für eine Kanalisation zum Transport von Flüssigkeiten
EP0505297A1 (de) Hydraulischer Zylinder mit Vorrichtung zum Anzeigen der Kolbenstellung
EP0403355B1 (de) Schieberventil
EP0517329A1 (de) Hohler Schneckenbohrer zur Herstellung von Ortbetonpfähler, und Bohrvorrichtung mit mindestens zwei dieser Schneckenbohrer
FR2719921A1 (fr) Dispositif de dosage de fluide, à organe d'étranglement pivotant dans un conduit.
FR2773839A1 (fr) Charniere de porte a cran de retenue, notamment pour un vehicule automobile
FR2623738A1 (fr) Dispositif de coupe, tel que cisaille, a commande hydraulique
EP1717118B1 (de) Scheibenwischer
FR2622245A1 (fr) Dispositif de fermeture d'imposte ou analogue
EP0064422A1 (de) Ferngesteuerte Einrichtung für einen Fahrzeugrückblickspiegel
EP0845332A1 (de) Vorrichtung zum Befestigen von Dichtungslippen
FR2811283A1 (fr) Dispositif d'aide au chenillage
FR2520817A1 (fr) Pince d'assemblage de profiles
FR2587929A1 (fr) Pince a commande electrique, notamment pour robot de manipulation
FR2783451A1 (fr) Robot de manipulation d'un objet
FR2691933A1 (fr) Essuie-glace à brosse, pour vitre de véhicule automobile.
FR2748223A1 (fr) Structure semi-etanche a l'eau pour assurer l'etancheite d'une plaque sur une machine d'usinage par etincelage a fil immerge
EP0873486B1 (de) Rohrförmiges verbindungselement
EP4234851A1 (de) Verriegelungsmechanismus für mindestens ein in einem ersten bereich angeordnetes bewegliches element mit einem aus einem zweiten bereich verstellbaren bauteil, luftfahrzeug, das mindestens einen solchen verriegelungsmechanismus umfasst
FR2751725A1 (fr) Dispositif d'obturation provisoire ou definitive sur une conduite de distribution d'eau en charge
EP0791548A2 (de) Vorrichtung zur Automatisierung des Öffnens und Schliessens eines Klapplagers

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: A1

Designated state(s): AT BE CH DE ES GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890428

17Q First examination report despatched

Effective date: 19891024

ITF It: translation for a ep patent filed

Owner name: FIAMMENGHI - DOMENIGHETTI

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB GR IT LI LU NL SE

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

Ref country code: SE

Effective date: 19900926

Ref country code: GR

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: 19900926

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19900926

Ref country code: AT

Effective date: 19900926

REF Corresponds to:

Ref document number: 57000

Country of ref document: AT

Date of ref document: 19901015

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3860698

Country of ref document: DE

Date of ref document: 19901031

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

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

Ref country code: LU

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

Effective date: 19910831

Ref country code: LI

Effective date: 19910831

Ref country code: CH

Effective date: 19910831

Ref country code: BE

Effective date: 19910831

26N No opposition filed
BERE Be: lapsed

Owner name: SOC. D'ETUDES ET DE MONTAGES SDEM S.A.

Effective date: 19910831

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19990826

Year of fee payment: 12

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

Ref country code: DE

Payment date: 19990911

Year of fee payment: 12

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

Ref country code: GB

Payment date: 19990921

Year of fee payment: 12

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

Ref country code: GB

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

Effective date: 20000825

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

Ref country code: NL

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

Effective date: 20010301

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

Effective date: 20000825

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20010301

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: 20010501

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: 20050825