EP0735275B1 - Dispositif à crans - Google Patents

Dispositif à crans Download PDF

Info

Publication number
EP0735275B1
EP0735275B1 EP96100338A EP96100338A EP0735275B1 EP 0735275 B1 EP0735275 B1 EP 0735275B1 EP 96100338 A EP96100338 A EP 96100338A EP 96100338 A EP96100338 A EP 96100338A EP 0735275 B1 EP0735275 B1 EP 0735275B1
Authority
EP
European Patent Office
Prior art keywords
valve
unblockable
return valve
switching device
line
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
EP96100338A
Other languages
German (de)
English (en)
Other versions
EP0735275A2 (fr
EP0735275A3 (fr
Inventor
Rüdiger Dipl.-Ing. Jung
Harald Dipl.-Ing. Bär
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.)
Hydac Fluidtechnik GmbH
Original Assignee
Hydac Fluidtechnik 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
Application filed by Hydac Fluidtechnik GmbH filed Critical Hydac Fluidtechnik GmbH
Publication of EP0735275A2 publication Critical patent/EP0735275A2/fr
Publication of EP0735275A3 publication Critical patent/EP0735275A3/fr
Application granted granted Critical
Publication of EP0735275B1 publication Critical patent/EP0735275B1/fr
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
    • 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 switching device for driving at least a hydraulic actuator with two counter-acting Check valves in an inlet and outlet line connected to the respective actuator and are connected to a switching valve.
  • comparable Switching devices as known from DE-A-35 24 759 are used, for example, provided that it is in the actuator is a hydraulic cylinder, the piston rod of the hydraulic cylinder to retract and extend for an actuation process. In doing so alternately the two counteracting for a movement cycle Check valves opened once for the flow of the fluid.
  • Unlockable check valves which hydraulically a control line can be unlocked and for example for prevention of creeping movements on controlled by slide valves, under Loaded cylinders are used or to shut off under System parts under pressure, such as press cylinders, as well as to avoid them of uncontrolled movements of consumers under load, for example in the event of a pipe break or pump failure.
  • Related areas of application can be found among other things in injection molding machines, aerial work platforms, Support cylinders, in mobile and clamping hydraulics as well as at Handling equipment.
  • a hydraulic actuating device for a movement in different Not only to head for directions, but with changing ones Actuator under load this within a predetermined
  • a tillage implement such as a plow
  • a tillage implement is engaged under load stay with the soil to be worked and do not lift off from it should, even if the tillage device due to the type of Soil or the course of the soil itself experiences a retroactive force that in the case of other constructions, immediately for at least a short lift-off of the tillage implement.
  • the object of the invention based on a switching device for controlling at least one hydraulic Actuator with which it is possible to create the above mentioned float position for relevant actuators To achieve inexpensive and reliable with few components.
  • a switching device with the features solves this problem of claim 1.
  • Soil cultivation device is an interfering force, which in itself is to be lifted off forces from the ground, is due to the floating position of the respective actuator achieves that a corresponding force in the sense of a Compensation is included and the tillage implement in its editing position remains.
  • the two check valves 30 and 32 are hydraulically unlocked and between the first check valve 20 and the switching valve 28 opens Control line 38 of the second unlockable check valve 32 into the feed line 24.
  • the lock port 40 of the first unlockable check valve 30 in turn opens in the fluid direction behind the first check valve 20 into the feed line 24 to the hydraulic cylinder 10.
  • the flow connection 42 of the first unlockable check valve 30 is in the drain line 26 the flow connection 44 of the second check valve 22 connected and drain line 26 is unlockable to flow port 46 of the second Check valve 32 connected.
  • the switching valve 28 If the switching valve 28 is in its right or second seen in FIG. brought another switching position, the drain line 26 with the hydraulic pump P connected fluid-carrying. Exceeds that which can be generated by the hydraulic pump P. Pressure in the drain line 26 a predetermined threshold, for example > 10 bar, the second unlockable via the flow connection 46 Check valve 32 opened and then in the blocking port 36 and Fluid pressure present in the control line 34 also becomes the first unlockable Check valve 30 opened. This opening process also happens when there is no pressure in the control line 38. By the same current pressure of the hydraulic pump P at the second check valve 22 the drain line 26, this check valve remains closed and the two Working spaces 16 and 18 of the actuating device are open first unlockable check valve 30 fluid-carrying and pressure-equalizing connected.
  • a predetermined threshold for example > 10 bar
  • FIG. 2 shows a hydraulically unlockable check valve, such as it is preferably used in the switching device according to Fig.1.
  • Check valves 30, 32 that can be unlocked are directly controlled Ball seat valves with a closing ball 48 for oil-hydraulic systems. she allow in the flow direction from the respective flow connection 42, 46 to the blocking connection 36 or 40 free flow. In the opposite direction the closing ball 48 by the closing spring 50 and by the pressure on the respective Locking connection 36.40 pressed on the valve seat and locks the addressed Flow direction free of oil leaks.
  • By initiating a sufficient high control pressure on the respective control line 34, 38 then becomes the Control piston 52 moved and the closing ball 48 pressed from its valve seat.
  • the valve is then hydraulically unlocked and can be used by the respective Flow connection 36.40 to the associated flow connection 42 or 46 flows become.
  • the return spring used under the control piston 52 enables Pressure relief on the respective control line 34, 38 a delay-free Downshifting.
  • the switching device described can be particularly advantageous in agricultural Use machines where a work tool, such as a plow or tedder, in constant engagement or in contact with the floor to be worked on.
  • a work tool such as a plow or tedder
  • With the switching device also several, for example connected in series and in parallel related actuators for a floating Control storage of work equipment. Further areas of application of the Switching device in road construction or in street sweepers and at Transport vehicles are possible.

Claims (8)

  1. Dispositif de commutation pour amorcer au moins un système de commande hydraulique avec deux clapets antiretour à effet opposé (20, 22) dans une conduite d'arrivée (24) et de décharge (26) qui est branchée au système de commande respectif ainsi qu'à un relais capteur (28), caractérisé en ce que
    deux clapets antiretour pilotés (30, 32) sont présents,
    le deuxième clapet antiretour piloté (32) est monté en parallèle au deuxième clapet antiretour (22), et
    le branchement de passage (42) du premier clapet antiretour piloté (30) dans la conduite de décharge (26) est branché au branchement de passage (44) du deuxième clapet antiretour (22), et
    la conduite de pilotage (34) du premier clapet antiretour piloté (30) est branchée au branchement de retenue (36) du deuxième clapet antiretour piloté (32).
  2. Dispositif de commutation selon la revendication 1, caractérisé en ce que chaque système de commande hydraulique est un cylindre hydraulique à double effet (10), en ce qu'entre le premier clapet antiretour (20) et le relais capteur (28), la conduite de commande (38) du deuxième clapet antiretour piloté (32) donne sur la conduite d'arrivée (24), et en ce que le branchement de retenue (40) du premier clapet antiretour piloté (30), dans la direction du fluide, derrière le premier clapet antiretour (20), donne sur la conduite d'arrivée (24) menant au cylindre hydraulique (10).
  3. Dispositif de commutation selon la revendication 2, caractérisé en ce que la conduite de décharge (26) est branchée au branchement de passage (46) du deuxième clapet antiretour piloté (32).
  4. Dispositif de commutation selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le relais capteur (28) est une vanne à 4/3 voies, en particulier une vanne à passage direct, dans la position de commutation centrale de laquelle, la conduite d'arrivée (24) et la conduite de décharge (26) sont séparées d'une pompe hydraulique (P) et d'un réservoir (T).
  5. Dispositif de commutation selon la revendication 4, caractérisé en ce que dans l'une des positions de commutation du relais capteur (28) pour soulever et maintenir la tige de piston (14) du cylindre hydraulique, on commande l'ouverture du deuxième clapet antiretour piloté (32) et le premier clapet antiretour piloté (30) reste fermé, et en ce que dans l'autre position de commutation, et ensuite dans la position de commutation centrale, à une pression de service pouvant être prédéterminée, les deux clapets antiretour pilotés (30, 32) sont ouverts de telle sorte que les deux espaces de travail (16, 17) du cylindre hydraulique (10) sont reliés ensemble en conduisant le fluide.
  6. Dispositif de commutation selon la revendication 5, caractérisé en ce que la pression de service est supérieure à 10 bars et en ce que la position de commutation centrale du clapet antiretour (28) se règle automatiquement si celui-ci n'est pas actionné.
  7. Dispositif de commutation selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le clapet antiretour piloté (30, 32) respectif peut être piloté hydrauliquement et présente à son piston pilote (52) au moins un point d'étanchéité (54) qui sépare au moins la conduite de pilotage (34, 38) du branchement de passage (42, 46) sans huile de fuite.
  8. Utilisation du dispositif de commutation selon l'une quelconque des revendications 1 à 7 sur des outils-machines agricoles, dans lesquels un outillage doit rester en prise continue ou en contact avec le sol à travailler.
EP96100338A 1995-03-29 1996-01-11 Dispositif à crans Expired - Lifetime EP0735275B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511522 1995-03-29
DE19511522A DE19511522C1 (de) 1995-03-29 1995-03-29 Rastschaltvorrichtung

Publications (3)

Publication Number Publication Date
EP0735275A2 EP0735275A2 (fr) 1996-10-02
EP0735275A3 EP0735275A3 (fr) 1998-04-22
EP0735275B1 true EP0735275B1 (fr) 2002-09-18

Family

ID=7758059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100338A Expired - Lifetime EP0735275B1 (fr) 1995-03-29 1996-01-11 Dispositif à crans

Country Status (5)

Country Link
US (1) US5699714A (fr)
EP (1) EP0735275B1 (fr)
JP (1) JPH08320001A (fr)
AT (1) ATE224510T1 (fr)
DE (2) DE19511522C1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10149787B4 (de) * 2000-10-23 2012-06-06 Linde Material Handling Gmbh Ventilanordnung mit Schwimmstellung
US8469677B1 (en) * 2007-10-01 2013-06-25 Sauer-Danfoss Inc. Check valve pump with electric bypass valve
DE102008036876A1 (de) * 2008-08-07 2010-04-15 Schaeffler Kg Nockenwellenverstellvorrichtung für eine Brennkraftmaschine
CN103697315A (zh) * 2013-12-12 2014-04-02 广西壮族自治区特种设备监督检验院 游乐设施用肩式安全压杠锁紧机构
DE102015216833A1 (de) * 2015-09-03 2017-03-09 Robert Bosch Gmbh Entsperrbares Rückschlagventil für ein Schieberventil, Verfahren zum Ansteuern des entsperrbaren Rückschlagventils und Schieberventil mit dem entsperrbaren Rückschlagventil
DE102016214767A1 (de) * 2016-02-16 2017-08-17 Sms Group Gmbh Gleichgangzylinder für Strangpressanlagen
CN114135532A (zh) * 2021-10-11 2022-03-04 烟台艾迪精密机械股份有限公司 一种并联集成式多级单向阀

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3463187A (en) * 1968-02-07 1969-08-26 Gen Signal Corp Hydraulically operated power steering circuit
US4169490A (en) * 1977-06-03 1979-10-02 Taplin John F Pilot operated four way valve
JPS5670105A (en) * 1979-11-13 1981-06-11 Mitsuwa Seiki Co Ltd Oil jack
US4362018A (en) * 1980-06-12 1982-12-07 Kobe Steel, Ltd. Hydraulic rotation control circuit
DE3524759A1 (de) * 1985-07-11 1987-01-22 Bosch Gmbh Robert Wegeventil
JPH0452087Y2 (fr) * 1988-11-14 1992-12-08
DE4105459A1 (de) * 1991-02-21 1992-08-27 Heilmeier & Weinlein Hydraulische steuervorrichtung
US5351601A (en) * 1992-05-04 1994-10-04 Control Concepts, Inc. Hydraulic control system

Also Published As

Publication number Publication date
JPH08320001A (ja) 1996-12-03
US5699714A (en) 1997-12-23
EP0735275A2 (fr) 1996-10-02
ATE224510T1 (de) 2002-10-15
EP0735275A3 (fr) 1998-04-22
DE59609666D1 (de) 2002-10-24
DE19511522C1 (de) 1996-07-18

Similar Documents

Publication Publication Date Title
EP1915538B1 (fr) Montage pour commander un cylindre d'entrainement hydraulique a double effet
DE10216958B3 (de) Hydraulische Steuerung
DE102004050294B3 (de) Hydraulische Ventilanordnung
AT503811B1 (de) Hydraulische schaltungsanordnung zur betätigung eines hydraulischen arbeitszylinders
EP0759109B1 (fr) Systeme hydraulique pour engin de chantier mobile, notamment un chargeur a roues
EP1450048A1 (fr) Agencement de vanne
EP1781952B1 (fr) Ensemble de commande hydraulique
EP1574474A2 (fr) Agencement hydraulique
EP0789816B1 (fr) Dispositif de recuperation d'energie
DE2335704A1 (de) Hydraulikanlage
DE4342642C2 (de) Elektro-hydraulische Schnellfallschaltung
EP3527833B1 (fr) Circuit d'alimentation à commande à pression réglable
EP0735275B1 (fr) Dispositif à crans
DE4028887C2 (de) Hydraulische Steuereinrichtung
DE19653810A1 (de) Hydraulische Einrichtung zur Steuerung des Druckmittelflusses
DE19548943B4 (de) Ventilanordnung
DE19608801A1 (de) Hydraulisches Lasthalte- bzw. Senkbremsventil
DE2718190C2 (de) Hydraulische Kolben-Zylinder-Anordnung zum Kippen des Fahrerhauses eines Lastkraftwagens
EP2466154B1 (fr) Dispositif de commande hydroélectrique
EP2157320B1 (fr) Commande hydraulique pour un moteur hydraulique
DE2816212A1 (de) Steuergeraet fuer ein hydraulisches arbeitsgeraet
DE10321914A1 (de) Hydraulische Steueranordnung
EP2985470B1 (fr) Dispositif de commande pour un cylindre de travail actionné par un fluide ayant au moins une fonction de levage et d'abaissement
EP2157319A1 (fr) Commande hydraulique pour un moteur hydraulique
DE2307294A1 (de) Kolbenschieberanordnung

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: A2

Designated state(s): AT CH DE FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19980514

17Q First examination report despatched

Effective date: 20000712

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HYDAC FLUIDTECHNIK GMBH

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI SE

REF Corresponds to:

Ref document number: 224510

Country of ref document: AT

Date of ref document: 20021015

Kind code of ref document: T

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ISLER & PEDRAZZINI AG

Ref country code: CH

Ref legal event code: EP

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

Effective date: 20020918

REF Corresponds to:

Ref document number: 59609666

Country of ref document: DE

Date of ref document: 20021024

ET Fr: translation filed
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

26N No opposition filed

Effective date: 20030619

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

Ref country code: GB

Payment date: 20041216

Year of fee payment: 10

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

Ref country code: SE

Payment date: 20050114

Year of fee payment: 10

Ref country code: DE

Payment date: 20050114

Year of fee payment: 10

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

Ref country code: CH

Payment date: 20050117

Year of fee payment: 10

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

Ref country code: AT

Payment date: 20050127

Year of fee payment: 10

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

Ref country code: FR

Payment date: 20050131

Year of fee payment: 10

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: 20060111

Ref country code: AT

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

Effective date: 20060111

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

Ref country code: SE

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

Effective date: 20060112

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

Ref country code: LI

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

Effective date: 20060131

Ref country code: FR

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

Effective date: 20060131

Ref country code: CH

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

Effective date: 20060131

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

Ref country code: IT

Payment date: 20060131

Year of fee payment: 11

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: 20060801

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060111

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060929

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: 20070111