EP0505349B2 - Vérin hydraulique - Google Patents

Vérin hydraulique Download PDF

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Publication number
EP0505349B2
EP0505349B2 EP92890058A EP92890058A EP0505349B2 EP 0505349 B2 EP0505349 B2 EP 0505349B2 EP 92890058 A EP92890058 A EP 92890058A EP 92890058 A EP92890058 A EP 92890058A EP 0505349 B2 EP0505349 B2 EP 0505349B2
Authority
EP
European Patent Office
Prior art keywords
piston
pressure
cylinder
arrangement
hydraulic
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 - Lifetime
Application number
EP92890058A
Other languages
German (de)
English (en)
Other versions
EP0505349B1 (fr
EP0505349A3 (en
EP0505349A2 (fr
Inventor
Gerhard Dipl.-Ing. Huber (Fh)
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.)
Hoerbiger GmbH
Original Assignee
Hoerbiger GmbH
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
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Application filed by Hoerbiger GmbH filed Critical Hoerbiger GmbH
Publication of EP0505349A2 publication Critical patent/EP0505349A2/fr
Publication of EP0505349A3 publication Critical patent/EP0505349A3/de
Publication of EP0505349B1 publication Critical patent/EP0505349B1/fr
Application granted granted Critical
Publication of EP0505349B2 publication Critical patent/EP0505349B2/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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices

Definitions

  • the invention relates to a hydraulic cylinder / piston arrangement according to the preamble of claim 1.
  • Hydraulically operated working cylinders are in the most varied nowadays Connections for the movement or adjustment of device and machine parts or the like in use.
  • the main advantages are Simplicity and operational safety of these components as well as the circumstance call that any sub or translation of Let speed and lifting power be achieved.
  • the opening device has one hydraulically opposite each other Working space in the cylinder connected cylinder / piston adjustment arrangement whose pistons are spring-loaded when pressurized Valve element in the connecting line of the pressure limiting member assigned Keep workspace open.
  • this adjustment arrangement can easily open an opening be ensured at the normal working pressure of the overall arrangement.
  • the for Adjustment of the working piston in the direction of a reduction of the Pressure limiting member assigned to the work area in the opposite Hydraulic medium pressure acting on the work area also serves at the same time to keep the valve element open, which bypasses the pressure limiting element a largely unimpeded outflow of the hydraulic medium from the shrinking work space, so that the normal hydraulic actuation of the working piston is not significantly hindered and no separate pressure connections or the like for this actuation of the Valve element are required.
  • the object of the present invention is to arrange the arrangement to improve the type mentioned so that in particular a simple and compact Structure of the locking device is made possible.
  • Training is provided that pressure limiting member, opening device and valve element arranged in a bore of the housing of the cylinder which is closed to the outside and the hydraulic connection of the cylinder connects to the work area.
  • a further embodiment of the invention is advantageous for some cases, according to which a throttle point is also provided in the bore. This acts as a so-called flow restrictor, which prevents the jerky retraction Working piston prevented by a low back pressure in the piston chamber remains.
  • the hydraulic cylinder / piston arrangement shown consists in essentially from a housing 1 that receives a cylinder 2, the Both sides of a 2 adjustable piston in this cylinder 3 working spaces 4, 5, each via connecting lines 6, 7 for hydraulic medium are connected to the outside to hydraulic connections 8.
  • the one about a seal 10 piston 3 sealed in cylinder 2 is connected to a piston rod 9, which protrudes from the housing 1 at the upper end thereof in the illustration and for actuating a device or machine part, not shown serves.
  • a Receiving part 11 is provided with a connection bore 12, by means of which the entire arrangement for example on a machine bed or the like fixed or rotatable can.
  • an insert part 13 is provided, a seal via seals 14, 15 against the piston rod 9 on the one hand and the Receiving hole 16 in the housing 1 on the other hand ensures and the piston rod 9 on a guide sleeve 17 centered.
  • This insert part 13 is via a locking ring arranged in a groove 19 18 held in the receiving bore 16.
  • a mechanical one End position damping for the upper setting shown of the piston 3 provided which Discs 20, 21 and 22 with intermediate ones Damping elements 23 exists.
  • stepped bore 24 of the housing 1 which with a circlip 25 held cover 26 completed to the outside and the lower hydraulic connection in the illustration 8 of the cylinder 2 with the working space 4 connects, are a pressure relief member 27, a Valve element 28, a throttle point 29 and one Opening device 30 for the valve element 28 arranged.
  • the closing ball 31 of the valve element 28 is together with a via a spring 32 in the representation, the load body pushed up 33 of the top in the illustration Side in a stepped bore 34 of the cover 26 used. From the bottom is the throttle point 29 in a likewise graduated further bore 35 used, which in turn with a screw plug sealed by a seal 36 37 is completed.
  • the pressure limiting member 27 has a a spring 38 against one on a sealing ring 39 at the upper end of the bore 34 in the illustration sealing surface formed in the cover 26
  • Closing element 41 which is a central Connection bore 42 for the from the work space 4th to the hydraulic connection 8 through connection line 7 has.
  • This connecting bore 42 acts at its lower end in the illustration with the Closing ball 31 of the valve element 28 together and is in the depressurized state of the arrangement completed.
  • the closing element 41 laterally perpendicular to the connecting hole 42 provided with a bore 43 which is essentially with the leading to the hydraulic connection 8 Bore 44 in the housing 1 is aligned.
  • the opening device 30 is arranged, which one with the opposite Working area 5 hydraulically connected cylinder / piston adjustment arrangement 45, whose Piston 46 when pressurized via the connecting line 47 the valve element 28 or its Closing ball 31 via an actuating pin 48 keeps open.
  • the arrangement shown makes it possible to determine the piston rod 9 or the piston 3 in any position against a defined counterforce F L. This is done in the following way:
  • the counterforce F L acts in the direction of force.
  • a pressure which corresponds to the load F L arises in the piston-side working chamber 5, the hydraulic medium being closed in this working chamber 5.
  • the closing ball 31 of the valve element 28 seals at the lower end of the connecting bore 42 in the illustration, and the closing element 41 of the pressure limiting member 27 is pressed onto the sealing ring 39 by the prestressing of the spring 38 and also seals there.
  • the closing element 41 opens on the sealing surface 40 and allows hydraulic medium to flow out of the working space 4 to the associated hydraulic connection 8.
  • the hydraulic medium takes the path via the lateral bore 49 at the lower end of the working space 4 in the illustration, the connecting bores 50 in the cover 26, the throttle point 29, the outer diameter of the load body 33, the outer diameter of the closing ball 31, the opened sealing surface 40 the area of bore 24 receiving spring 38 and bore 44 for hydraulic connection 8.
  • the throttle point 29 is a so-called discharge throttle provided a jerky retraction the piston 3 prevented by a low back pressure remains in the work room 4.
  • the Washer 51 on the top in the illustration Side of the piston 46 has only one function Spacer.
  • the screw plug 37 allows a simple replacement of the throttle point 29, so that the suitable nozzle diameter for the respective load case can be selected. At an optimized nozzle diameter could of course the screw plug 31 is also omitted and the cover 26 is not drilled out at this point be.
  • the throttling effect could also by designing the holes accordingly 50 are met, which then also directly in the installation space for the spring 32 could open.
  • the piston 3 can be differential or simple be extended.
  • the hydraulic medium flows from the lower hydraulic connection 8 via the Hole 43 and the play between the connecting hole 42 and actuating pin 48, opens the Closing ball 31 against the only slightly biased Spring 32 and continues to flow over the throttle point 29, the holes 50 and the bore 49 in the Working space 4, with which the piston 3 together with the piston rod 9 extends.
  • differential extension the pressure in the work area 5 supports opening the closing ball 31 in already described above Wise.

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

Claims (3)

  1. Agencement à piston-et-cylindre hydraulique, comportant un cylindre (2) qui présente, du moins sur un côté d'un piston mobile (3) qui s'y déplace, une chambre de travail (4, 5) reliée vers l'extérieur via une conduite de raccordement (6, 7) pour le fluide hydraulique, et comportant en outre un un dispositif de verrouillage pour le blocage du piston (3) lors d'une défaillance de la pression du fluide hydraulique, le dispositif de verouillage présentant un organe limiteur de pression (27) qui présente un élément de fermeture (41) qui referme de manière étanche la conduite de raccordement (7) au niveau d'une surface d'étanchéité fixe (40) et qui s'ouvre à partir d'une sollicitation sous pression déterminée du fluide hydraulique qui se trouve dans la chambre de travail (4) associée en raison d'une force (FZ) appliquée via le piston (3), un dispositif d'ouverture (30) étant prévu qui contourne l'organe limiteur de pression (27) lors d'un actionnement hydraulique du piston (3) et qui fait cesser ce contournement lorsque les raccordements (8) sont exempts de pression, ce dispositif d'ouverture (30) présentant un agencement de déplacement à piston-et-cylindre (45) relié hydrauliquement respectivement à la chambre de travail (5) opposée dans le cylindre (2), dont le piston (46) tient ouverte, lors d'une sollicitation sous pression, un élément de soupape (28) chargé par ressort dans la conduite de raccordement (7) de la chambre de travail (4) associée à l'organe limiteur de pression (27), caractérisé en ce que l'élément de fermeture (41) de l'organe limiteur de pression (27) présente un perçage de liaison central (42) pour la conduite de raccordement (7), qui coopère avec l'élément de soupape (28) et qui reçoit avec jeu un tenon d'actionnement (48) relié au piston (46) de l'agencement de déplacement à piston-et-cylindre (45).
  2. Agencement selon la revendication 1, caractérisé en ce que l'organe limiteur de pression (27), le dispositif d'ouverture (30) et l'élément de soupape (28) sont agencés dans un perçage (24) du boítier (1) de cylindre (2), ledit perçage étant refermé vers l'éxterieur et reliant le raccordement hydraulique (8) du cylindre (1) à la chambre de travail (4).
  3. Agencement selon la revendication 1 ou 2, caractérisé en ce que dans le perçage (24) est prévu en outre un étranglement (29).
EP92890058A 1991-03-20 1992-03-17 Vérin hydraulique Expired - Lifetime EP0505349B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT619/91 1991-03-20
AT0061991A AT402334B (de) 1991-03-20 1991-03-20 Hydraulische zylinder/kolben-anordnung

Publications (4)

Publication Number Publication Date
EP0505349A2 EP0505349A2 (fr) 1992-09-23
EP0505349A3 EP0505349A3 (en) 1993-03-03
EP0505349B1 EP0505349B1 (fr) 1995-05-24
EP0505349B2 true EP0505349B2 (fr) 1998-05-27

Family

ID=3495386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92890058A Expired - Lifetime EP0505349B2 (fr) 1991-03-20 1992-03-17 Vérin hydraulique

Country Status (4)

Country Link
US (1) US5235896A (fr)
EP (1) EP0505349B2 (fr)
AT (1) AT402334B (fr)
DE (1) DE59202285D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10142884A1 (de) * 2001-09-03 2003-03-27 Stabilus Gmbh Auslöseeinrichtung für ein blockierbares Kolben-Zylinderaggregat

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5490443A (en) * 1988-04-13 1996-02-13 Atsuta; Yuzuru Pressure-discharged type retaining system
US5402866A (en) * 1993-01-08 1995-04-04 International Transouip Industries, Inc. Brake assembly with new locking mechanism
US5400694A (en) * 1994-03-04 1995-03-28 Mcneilus Truck And Manufacturing, Inc. Hydraulic cylinder with internal safety valve
DE29916002U1 (de) * 1999-09-13 2001-02-08 Wilhelm Karmann GmbH, 49084 Osnabrück Cabriolet-Fahrzeug
US8444128B2 (en) * 2008-09-04 2013-05-21 Vektek, Inc. Double acting work support with internal sequence control
CN111432985B (zh) * 2017-12-07 2021-11-09 麦克赛尔泉株式会社 电动工具
JP7320924B2 (ja) * 2018-05-22 2023-08-04 ナブテスコ株式会社 流体圧バルブ

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
US2633871A (en) * 1949-08-02 1953-04-07 John B Parsons Electromagnetic control valve device for fluid pressure systems or the like
GB734434A (en) * 1953-01-24 1955-08-03 Carbodies Ltd Means for operating a drop-head of a motor-car body
US3274902A (en) * 1965-10-22 1966-09-27 Deere & Co Hydraulic control system
US3392633A (en) * 1966-10-21 1968-07-16 Caterpillar Tractor Co Overridable check valve mechanism
US3747351A (en) * 1971-10-22 1973-07-24 Bertea Corp Hydraulic system
US3908515A (en) * 1973-09-10 1975-09-30 Caterpillar Tractor Co Hydraulic circuit with selectively actuatable float control
US3933167A (en) * 1974-02-20 1976-01-20 Tomco, Inc. Pilot operated check valve
US3943968A (en) * 1975-01-06 1976-03-16 Parker-Hannifin Corporation Combination lock and relief valve for hydraulic systems
FR2427499A1 (fr) * 1978-06-01 1979-12-28 Sarrazin Applic Hydr Dispositif de commande integre pour circuit de fluide, et ses applications
SU724805A1 (ru) * 1978-09-01 1980-03-30 Проектно-Конструкторский И Технологический Институт Кузробот Односторонний гидравлический замок гидроцилиндра
US4244275A (en) * 1979-01-15 1981-01-13 Abex Corporation Counterbalance valve
DE2946765C2 (de) * 1979-11-20 1986-04-30 Thyssen Industrie Ag, 4300 Essen Entsperrbares Rückschlagventil
SU885644A1 (ru) * 1979-12-13 1981-11-30 Предприятие П/Я В-8664 Гидросистема управлени
SU879065A1 (ru) * 1980-01-14 1981-11-07 Тульский Проектно-Конструкторский Технологический Институт Комбайностроения "Проектин" Гидропривод
GB2073564B (en) * 1980-04-15 1983-06-08 Thomas K H Plough turn-over mechanism
JPS5765403A (en) * 1980-10-07 1982-04-21 Mitsuwa Seiki Co Ltd Lifter for cab
DE3042277A1 (de) * 1980-11-08 1982-06-03 Robert Bosch Gmbh, 7000 Stuttgart Steuervorrichtung fuer einen hydraulischen arbeitszylinder
JPS57107405A (en) * 1980-12-24 1982-07-03 O G Giken Kk Hydraulic operating device
US4429529A (en) * 1981-11-20 1984-02-07 Applied Power Inc. Hydraulic control system having reciprocating pump and handle operated rotating valve
EP0163771A2 (fr) * 1984-05-10 1985-12-11 KLB Hydrosystem GmbH Soupape de verrouillage pour frein de descente
US4667570A (en) * 1984-12-21 1987-05-26 The Boeing Company Integral hydraulic blocking and relief valve
US5081904A (en) * 1989-08-30 1992-01-21 Aladdin Engineering & Mfg., Inc. Locking valve and flow control valve assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10142884A1 (de) * 2001-09-03 2003-03-27 Stabilus Gmbh Auslöseeinrichtung für ein blockierbares Kolben-Zylinderaggregat
US6886450B2 (en) 2001-09-03 2005-05-03 Stabilus Gmbh Activation device for a piston/cylinder unit which can be inhibited

Also Published As

Publication number Publication date
ATA61991A (de) 1996-08-15
EP0505349B1 (fr) 1995-05-24
US5235896A (en) 1993-08-17
EP0505349A3 (en) 1993-03-03
AT402334B (de) 1997-04-25
DE59202285D1 (de) 1995-06-29
EP0505349A2 (fr) 1992-09-23

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