EP0073887A2 - Dispositif de commande hydraulique - Google Patents

Dispositif de commande hydraulique Download PDF

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Publication number
EP0073887A2
EP0073887A2 EP82105496A EP82105496A EP0073887A2 EP 0073887 A2 EP0073887 A2 EP 0073887A2 EP 82105496 A EP82105496 A EP 82105496A EP 82105496 A EP82105496 A EP 82105496A EP 0073887 A2 EP0073887 A2 EP 0073887A2
Authority
EP
European Patent Office
Prior art keywords
control
valve
plunger
detent
loaded
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
EP82105496A
Other languages
German (de)
English (en)
Other versions
EP0073887B1 (fr
EP0073887A3 (en
Inventor
Heribert Dipl.-Landwirt Adams
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0073887A2 publication Critical patent/EP0073887A2/fr
Publication of EP0073887A3 publication Critical patent/EP0073887A3/de
Application granted granted Critical
Publication of EP0073887B1 publication Critical patent/EP0073887B1/fr
Expired 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
    • F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve

Definitions

  • the invention relates to a hydraulic control unit, which has a control slide, which can be moved axially into a plurality of switching positions and can be fixed by an essentially radially arranged spring-loaded catch, in particular for supplying a lifting cylinder with pressure fluid.
  • -Return opens or blocks, a seat valve spring-loaded by the cylinder pressure and by a spring force in the closing direction serving for the pressure-side cylinder connection, which is arranged axially to the catch and can be actuated by the opening direction.
  • a control unit of the type described has become known, which is used in hydraulic lifting devices, in particular agricultural machines.
  • the poppet valve and the catch are combined to form a unit and both have a common spring acting on the poppet valve in the closing direction.
  • the cylinder pressure in the closing direction also acts on the seat valve, which on the one hand has a positive effect on the sealing effect of the valve.
  • the opening movement is made more difficult by the load on the seat valve, so that the desired slight actuation of the control slide for the fine control is not always given.
  • a check valve has become known from DE-OS 21 30 656, which is designed as a double valve.
  • a closing body of a relief valve which is spring-loaded in the same closing direction is arranged.
  • a plunger which is guided in the closing body of the check valve in a central longitudinal bore, engages on an actuating member at the other end.
  • the plunger is designed and arranged so that when it is actuated it first opens the relief valve, which has a much smaller opening cross-section, before it actuates its closing body in the opening direction after pressure equalization between the spaces in front of and behind the check valve.
  • control device axially to the detent or to the adjoining seat valve is a hydraulically connected in parallel to this and spring-loaded in the closing direction Relief valve having a much smaller opening cross-section, which can be actuated in the opening direction by the control slide in front of the seat valve.
  • the relief valve is opened first with each opening movement of the tappet starting from the control slide and subsequently the seat valve, which has already been relieved, so that an easy and thus sensitive actuation of the control slide is possible.
  • the combination of the seat and relief valve as well as the catch and the axial arrangement of these elements result in an extremely space-saving design.
  • the relief valve has a spherical closing body, which, including its loading spring, is arranged in a sleeve-shaped extension on the closing body of the seat valve.
  • a plunger engaging the closing body and the control slide and axially displaceable through the catch is provided for actuating the seat and relief valve. It is useful if the plunger rests with its end faces on the closing body of the Ent relief valve and the control slide and has a collar or the like for the actuation of the seat valve, which in the closed position of both valves related to the direction of movement at a distance in front of the closing body of the seat valve is arranged.
  • the control slide has a control groove which runs in the longitudinal direction in a radial plane in an arc-shaped manner in order to generate the axial movements of the tappet.
  • control slide 1 shows part of a control slide 1, which is arranged in a control unit (not shown) for supplying a hydraulic lifting cylinder 2 with hydraulic fluid and is axially displaceable for setting different switching stages.
  • a housing part 3 of the control unit sits in a stepped bore 4/5 running radially to the control slide 1 with two different radii a notch 6 designed as a hollow stepped piston, the two diameters of which are adapted to those of the stepped bore 4/5.
  • the catch 6 is axially displaceably mounted in the stepped bore 4/5 and is supported by a cylindrical one
  • the catch 6 is prism-shaped on its part 11 protruding from the bore 4 and here has two bores 12 for relieving pressure from its interior.
  • the control groove 16 is arcuate in radial extension, so that there are 1 axial movements of the plunger 14 with axial movement of the control slide.
  • the control slide 1 also has a recess 18 and a projection 19 for engaging or engaging the detent for the different switching position.
  • An annular space 20 enveloping the catch 6 is connected via a spring-loaded check valve 21 to a channel 22 in the housing part 3 of the control unit.
  • the plunger 14 has a collar 24 below the cover 9, which merges into a pin 25 at its lower end.
  • a space 27 in the housing part 3 which is connected to a working space 30 of the lifting cylinder 2 by a channel 28 and by a line 29 connected to it.
  • a seat valve 31 controlling its connection, the closing body 32 of which is pressed against its seat 34 in the closing direction by the force of a spring 33 acting thereon and by the cylinder pressure prevailing in the space 27.
  • the closing body 32 has one sleeve-shaped extension 36, which is partially enveloped by the spring 33.
  • a relief valve having a spherical closing body 37 and a spring 38 loading it in the closing direction is accommodated within the sleeve-shaped extension 36 of the closing body 32.
  • the closing body 32 of the seat valve 31 there is a central bore 39 through which the pin 25 of the plunger 14 projects with play and is supported on the spherical closing body 37.
  • a slot-shaped recess 40 extending in the image plane is provided in the closing body 32 on the upper side facing the collar 24 of the ram.
  • a plurality of radial bores 41 are arranged on the side of the spherical closing body 37.
  • the plunger 14 presses with its pin 25 against the spherical closing body 37 and brings it towards it the force of the spring 38 in the open position shown in FIG. 2.
  • the channel 22 is initially blocked by the control slide 1 against the further return to the reservoir for pressure fluid in a manner not shown, so that by opening the relief valve 37, 38th A pressure equalization takes place between the space 27 and the channel 22.
  • the control slide 1 is shifted further to the right into the switching position according to FIG. 3, the seat valve 31 is also opened by the collar 24 of the plunger, which is now supported on its closing body 32.
  • the control slide 1 can be actuated relatively sensitively, since after the pressure has been equalized on the closing body 32 in order to open the seat valve 31, only the force of the spring 33 has to be overcome.
  • the control slide 1 is moved to the left in a manner not shown until the catch 6 engages with its part 11 at 18.
  • the channel 22 is connected to a pressure fluid source via the control slide 1, the inlet cross section of the control slide increasing from the start of opening in the switch position 18 with its displacement to the left.
  • the pressure fluid passes through the seat valve 31, which is now hydraulically pushed open, into the space 27 and further via the line 29 into the working cylinder 2.
  • the valve 21 opens, so that the catch 6 is moved in the direction of the tongue 8 by acting in the area of the annular groove 20.
  • the Detent 6 thus releases from the engagement 18 and releases the control slide 1 so that it can be returned to its starting or return position by a return spring (not shown). 1 is reset.
  • the control slide 1 can also at any time by hand from the rest position 18 in the exit or. Neutral position can be reset.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Vehicle Body Suspensions (AREA)
EP82105496A 1981-09-05 1982-06-23 Dispositif de commande hydraulique Expired EP0073887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813135273 DE3135273A1 (de) 1981-09-05 1981-09-05 Hydraulisches steuergeraet
DE3135273 1981-09-05

Publications (3)

Publication Number Publication Date
EP0073887A2 true EP0073887A2 (fr) 1983-03-16
EP0073887A3 EP0073887A3 (en) 1984-06-13
EP0073887B1 EP0073887B1 (fr) 1987-02-04

Family

ID=6140999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105496A Expired EP0073887B1 (fr) 1981-09-05 1982-06-23 Dispositif de commande hydraulique

Country Status (2)

Country Link
EP (1) EP0073887B1 (fr)
DE (2) DE3135273A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181656A (en) * 1985-09-18 1987-04-29 Nils T Ottestad Exhaust & demand valves
EP0384157A2 (fr) * 1989-02-18 1990-08-29 Robert Bosch Gmbh Soupape à deux voies à commande pilotée hydrauliquement en manière à siège
CN113776600A (zh) * 2021-10-07 2021-12-10 长江水利委员会长江科学院 一种智能化水利工程结构安全监测系统及监测方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679263A (en) * 1950-02-28 1954-05-25 Case Co J I Hydraulic control valve
DE2849704A1 (de) * 1978-11-16 1980-05-29 Kloeckner Humboldt Deutz Ag Hydraulisches steuergeraet
FR2484029A1 (fr) * 1980-06-04 1981-12-11 Rexroth Sigma Perfectionnements apportes aux distributeurs a double effet.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644429A (en) * 1948-01-26 1953-07-07 Waterman Hydraulic control device
DE1119622B (de) * 1956-01-18 1961-12-14 Jean Louis Gratzmuller Hydraulische Anlage fuer den Antrieb von durch Fluessigkeitsdruck betaetigten Vorrichtungen, wie z.B. Fluessigkeitsmotoren
DE1186747B (de) * 1960-01-14 1965-02-04 Teves Kg Alfred Steuereinrichtung fuer Servomotoren mit Druckmittelversorgung durch Pumpe und Speicher

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679263A (en) * 1950-02-28 1954-05-25 Case Co J I Hydraulic control valve
DE2849704A1 (de) * 1978-11-16 1980-05-29 Kloeckner Humboldt Deutz Ag Hydraulisches steuergeraet
FR2484029A1 (fr) * 1980-06-04 1981-12-11 Rexroth Sigma Perfectionnements apportes aux distributeurs a double effet.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181656A (en) * 1985-09-18 1987-04-29 Nils T Ottestad Exhaust & demand valves
US4711263A (en) * 1985-09-18 1987-12-08 Nils T. Ottestad Double-acting valve system for underwater breathing or the like
GB2181656B (en) * 1985-09-18 1989-08-23 Nils T Ottestad Double-acting valve device
EP0384157A2 (fr) * 1989-02-18 1990-08-29 Robert Bosch Gmbh Soupape à deux voies à commande pilotée hydrauliquement en manière à siège
EP0384157A3 (fr) * 1989-02-18 1991-04-17 Robert Bosch Gmbh Soupape à deux voies à commande pilotée hydrauliquement en manière à siège
CN113776600A (zh) * 2021-10-07 2021-12-10 长江水利委员会长江科学院 一种智能化水利工程结构安全监测系统及监测方法
CN113776600B (zh) * 2021-10-07 2023-12-29 湖南巴陵水利水电建筑工程有限公司 一种智能化水利工程结构安全监测系统及监测方法

Also Published As

Publication number Publication date
DE3135273A1 (de) 1983-03-24
EP0073887B1 (fr) 1987-02-04
DE3275399D1 (en) 1987-03-12
EP0073887A3 (en) 1984-06-13

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