EP1462662B1 - Hydraulisches Stellglied mit leckagefreien pneumatischen Mitteln zur Positionsermittlung - Google Patents

Hydraulisches Stellglied mit leckagefreien pneumatischen Mitteln zur Positionsermittlung Download PDF

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Publication number
EP1462662B1
EP1462662B1 EP20040360025 EP04360025A EP1462662B1 EP 1462662 B1 EP1462662 B1 EP 1462662B1 EP 20040360025 EP20040360025 EP 20040360025 EP 04360025 A EP04360025 A EP 04360025A EP 1462662 B1 EP1462662 B1 EP 1462662B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic cylinder
piston
rod
detection means
orifice
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
EP20040360025
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English (en)
French (fr)
Other versions
EP1462662A1 (de
Inventor
Gérard Ripp
Gilbert Sprauel
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.)
Usines Quiri & Cie Sa Ste
Original Assignee
Usines Quiri & Cie Sa Ste
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Filing date
Publication date
Application filed by Usines Quiri & Cie Sa Ste filed Critical Usines Quiri & Cie Sa Ste
Publication of EP1462662A1 publication Critical patent/EP1462662A1/de
Application granted granted Critical
Publication of EP1462662B1 publication Critical patent/EP1462662B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • 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
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches

Definitions

  • the present invention relates to the field of fastening and positioning of parts on machine tools, in particular working at high speed, in particular the clamping and the abutment of parts by means of hydraulic displacement control devices provided with means of pneumatic position detection and relates to such a device provided with displacement position control means.
  • the means for clamping and abutting parts, as well as other abutment devices, for example anti-vibration devices, are generally in the form of hydraulic cylinders with double effect, linear displacement and / or rotary and allow effective clamping or precise positioning of workpieces or others.
  • position detectors which often consist of pneumatic assemblies cooperating alternately in the two positions of the cylinders with a closing means circuits these sets.
  • the pneumatic assemblies are in the form of independent pneumatic circuits fed alternately by a power plant and each opening at one end of a chamber extending in extension of the hydraulic cylinder.
  • This hydraulic jack is connected in said chamber to a slide movable in common with said hydraulic cylinder, so that said slide is positioned in each position of the cylinder in front of a corresponding orifice of one of the pneumatic circuits.
  • the power plant automatically delivers compressed air into the pneumatic circuit corresponding to the end of the chamber concerned and the presence of the drawer in front of the orifice of the corresponding pneumatic duct causes a rise in pressure in the pneumatic circuit, this pressure elevation being verified by means of a pressure switch which delivers an authorization signal for the next machining or handling operation.
  • the object of the present invention is to overcome these drawbacks by proposing a hydraulic displacement control device provided with pneumatic means for detecting the positions of the jack enabling more precise control of the displacement positions and operation without noise, without air leakage and perfectly clean.
  • the pneumatic detection means of the cylinder positions which are in the form of two pneumatic circuits each opening by an outlet orifice at one end of a pneumatic chamber in axial extension of a hydraulic cylinder parallel to the longitudinal axis of said chamber, each cooperate, in a position of the hydraulic cylinder, with a common device for sealing, by controlled pressure, the corresponding outlet orifice, connected in displacement with the piston of the hydraulic cylinder.
  • FIG. 1 of the accompanying drawings represents, by way of example, a hydraulic displacement control device in the form of a hydraulic cylinder 1, provided with means 2, 2 'for detecting the positions of the cylinder, which are in the form of two pneumatic circuits. each opening through an outlet at one end of a pneumatic chamber 3 in axial extension of the hydraulic cylinder 1.
  • the means 2, 2 'for detecting the positions of the cylinder open into the pneumatic chamber 3 following a axis parallel to the longitudinal axis of said chamber 3 and each cooperate, in a position of the hydraulic cylinder, with a common device 4 for sealing, by controlled pressure, the corresponding outlet orifice, connected in displacement with the piston of the hydraulic cylinder 1.
  • the common device 4 for sealing by controlled pressure is advantageously in the form of a member provided on two opposite faces with support means 5 and 6 intended to provide a pressure-tight seal against pressure.
  • output port of the pneumatic circuit 2, 2 ' corresponding in each position of the cylinder.
  • one, 5, support means forming the common sealing device 4, cooperating with the means 2, is in the form of a tight annular piece on the end of a rod 7 secured to the piston of the hydraulic cylinder 1 and having a resilient deformation capacity
  • the other support means 6 is constituted by a pusher mounted in the rod 7 of the piston of the hydraulic cylinder 1 with the possibility of displacement against a return spring 8 and closing, by a portion 6 'projecting from said rod 7, in the corresponding position of the piston of the hydraulic cylinder 1, the outlet of the corresponding means 2'.
  • the support means 5 is pressed on the outlet orifice of the pneumatic circuit forming the detection means 2 and closes this circuit in a perfectly sealed manner, so that pressurization of this circuit can be carried out very quickly and can be detected by the corresponding control pressure switch. The latter can then deliver a certification signal of the corresponding extreme position of the piston.
  • the orifice of the detection means 2 'cooperating with the portion 6' of the pusher forming the support means 6 may be, as shown by the Figures 1 and 2 of the accompanying drawings, in the form of a non-return valve provided with a guide rod 9 on which rests, in the corresponding extreme position of the piston of the hydraulic cylinder 1, the portion 6 'projecting from said rod 7 of the 6.
  • the support means 6 is in contact with the rod 9 of the non-return valve, so that the body of the latter closes completely and of sealing the corresponding outlet port of the pneumatic circuit 2 '.
  • Hydraulic displacement control devices of this type are generally constructed such that in one of the positions of the piston of the hydraulic cylinder, the corresponding limit switch is in the actuating position, the other position sensor of end of stroke being adjustable so as to take into account the useful stroke of the piston of the hydraulic cylinder.
  • the check valve forming the orifice of the detection means 2 'cooperating with the part 6' of the pusher forming the support means 6 can advantageously be mounted in the corresponding end of the pneumatic chamber 3 in a manner that can be adjusted position.
  • by this same adjustment and taking into account the length of the projecting portion 6 'it will be possible to take into account the overtravel of the cylinder in the absence of a normally foreseen obstacle such as a part, so that the protection of the cylinder and in particular the support means 6 and the corresponding detection means 2 'remains assured.
  • the return spring 8 acting on the support means 6 is calibrated at a force greater than that of detachment of the non-return valve under the maximum pressure available in the pneumatic circuit of the means 2 '.
  • the support means 6 may also be provided, on its portion 6 'projecting from the rod 7 connected to the piston of the hydraulic cylinder 1 of a device sealing by pressure of the outlet of the corresponding detection means 2 '.
  • This sealing device may, for example, be in the form of a membrane or a valve bearing directly on the outlet of the detection means 2 'and cooperating with this orifice by slight elastic deformation or by form.
  • each detection means 2, 2 'in the pneumatic chamber 3 of a non-return valve actuated in the position corresponding by an elastically deformable device preload could be in the form of a leaf spring fixed on a rod connected to the piston of the hydraulic cylinder and supported by its free end on the guide rod of the non-return valves.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)

Claims (10)

  1. Steuervorrichtung zum hydraulischen Bewegen in Form eines hydraulischen Zylinders (1), der mit Mitteln (2, 2') zum Erkennen der Position des Zylinders versehen ist, wobei die Mittel in Form von zwei Pneumatikkreisen vorliegen, die jeweils über eine Ausgangsöffnung an einem äußeren Ende einer Pneumatikkammer (3) in einer axialen Verlängerung des Hydraulikzylinders einmünden, dadurch gekennzeichnet, dass die Mittel (2, 2') zum Erkennen der Position des Zylinders in der Pneumatikkammer (3) entlang einer zur Längsachse der Kammer (3) parallelen Achse einmünden und jeweils in einer Position des Hydraulikzylinders mit einer gemeinsamen Vorrichtung (4) zum leckdichten Verschließen der entsprechenden Ausgangsöffnung durch einen kontrollierten Druck zusammenwirken, wobei die Vorrichtung bei der Bewegung mit dem Kolben des Hydraulikzylinders verbunden ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die gemeinsame Vorrichtung (4) zum leckdichten Verschließen durch kontrollierten Druck in Form eines Elementes vorliegt, das auf zwei sich gegenüber liegenden Flächen mit Auflagemitteln (5 und 6) versehen ist, die dafür vorgesehen ist, in jeder Position des Zylinders ein leckdichtes Verschließen durch den Druck der Ausgangsöffnung des entsprechenden Pneumatikkreises zu erzielen.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass eines (5) der die gemeinsame Vorrichtung (4) zum leckdichten Verschließen bildenden Auflagemittel mit dem Erkennungsmittel (2) zusammenwirkt und in Form eines ringförmigen, am äußersten Ende eines Schaftes (7) aufgepressten Elements vorliegt, das mit dem Kolben des Hydraulikzylinders (1) fest verbunden ist und die Möglichkeit einer elastischen Verformung bietet, während das andere Auflagemittel (6) aus einem im Schaft (7) des Kolbens des Hydraulikzylinders (1) eingebauten Stößel besteht und die Möglichkeit hat, sich gegen eine Rückholfeder (8) zu bewegen und durch ein aus dem Schaft (7) ragenden Teil (6') die Ausgangsöffnung des entsprechenden Erkennungsmittel (2') in der entsprechenden Position des Hydraulikzylinders (1) zu verschließen.
  4. Vorrichtung nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass die Öffnung des Erkennungsmittels (2'), welches mit dem Teil (6') des das Auflagemittel (6) bildenden Stößels zusammenwirkt, in Form eines Rückschlagventils vorliegt, das mit einem Führungsstab (9) versehen ist, auf dem in der entsprechenden Position des Kolbens des Hydraulikzylinders (1) das aus dem Schaft (7) des Auflagemittels (6) herausragende Teil (6') aufliegt.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Rückschlagventil, das die Öffnung des Erkennungsmittels (2') bildet und mit seinem Teil (6') des das Auflagemittel (6) bildenden Stößels in dem der Pneumatikkammer (3) entsprechenden äußeren Ende in einer Weise angebracht ist, die die Einstellung der Position erlaubt.
  6. Vorrichtung nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, dass die auf das Auflagemittel (6) wirkende Rückholfeder (8) auf eine Kraft eingestellt wird, die größer als die Ablösekraft des Rückschlagventils unter dem maximalen in dem Pneumatikkreis des Erkennungsmittels (2') auftretenden Druck ist.
  7. Vorrichtung nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass das Auflagemittel (6) auf seinem aus dem Schaft (7) herausragenden Teil (6'), das mit dem Kolben des Hydraulikzylinders (1) verbunden ist, mit einer Vorrichtung zum leckdichten Verschließen durch Druck der Ausgangsöffnung des entsprechenden Erkennungsmittels (2') versehen ist.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Vorrichtung zum leckdichten Verschließen in Form einer Membran oder eines Ventils vorliegt, die bzw. das direkt auf der Ausgangsöffnung des Erkennungsmittels (2') aufliegt und mit dieser Ausgangsöffnung durch eine geringfügige elastische Verformung oder formschlüssig zusammenwirkt.
  9. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Öffnung jedes Erkennungsmittels (2, 2') in der Pneumatikkammer (3) mit einem Rückschlagventil versehen ist, das in der entsprechenden Position durch eine elastisch verformbare, vorgespannte Vorrichtung betätigt wird.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die elastisch verformbare Vorrichtung in Form eines Federblattes vorliegt, das an einem Schaft befestigt ist, der mit dem Kolben des Hydraulikzylinders verbunden ist und mit seinem äußeren freien Ende auf dem Führungsstab der Rückschlagventile aufliegt.
EP20040360025 2003-03-24 2004-03-09 Hydraulisches Stellglied mit leckagefreien pneumatischen Mitteln zur Positionsermittlung Expired - Fee Related EP1462662B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0303561A FR2852873B1 (fr) 2003-03-24 2003-03-24 Dispositif a commande de deplacement hydraulique muni de moyens de detection pneumatique sans fuite des positions
FR0303561 2003-03-24

Publications (2)

Publication Number Publication Date
EP1462662A1 EP1462662A1 (de) 2004-09-29
EP1462662B1 true EP1462662B1 (de) 2008-02-27

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EP (1) EP1462662B1 (de)
DE (1) DE602004012011T2 (de)
FR (1) FR2852873B1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111351523B (zh) * 2019-12-04 2022-06-28 福建工程学院 一种单泵开式系统的液压缸位移和速度软测量方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555966A (en) * 1969-12-08 1971-01-19 Mead Specialties Co Inc Air cylinder with pilot valve in head
DD101469A1 (de) * 1972-12-21 1973-11-12
FR2288895A1 (fr) * 1974-08-30 1976-05-21 Geoffray Jean Pierre Verin a mecanisme detecteur de fins de course incorpore
FR2289781A1 (fr) * 1974-10-29 1976-05-28 Jouvenel & Cordier Dispositif de controle de fin de course de verins
DE19616441C1 (de) * 1996-04-25 1997-06-26 Tuenkers Maschinenbau Gmbh Kniehebelspannvorrichtung für den Karosseriebau

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Publication number Publication date
DE602004012011T2 (de) 2009-06-25
DE602004012011D1 (de) 2008-04-10
FR2852873A1 (fr) 2004-10-01
EP1462662A1 (de) 2004-09-29
FR2852873B1 (fr) 2005-05-27

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