EP0310134A2 - Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile - Google Patents

Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile Download PDF

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Publication number
EP0310134A2
EP0310134A2 EP88116284A EP88116284A EP0310134A2 EP 0310134 A2 EP0310134 A2 EP 0310134A2 EP 88116284 A EP88116284 A EP 88116284A EP 88116284 A EP88116284 A EP 88116284A EP 0310134 A2 EP0310134 A2 EP 0310134A2
Authority
EP
European Patent Office
Prior art keywords
pressure
control
line
switch
way valve
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
EP88116284A
Other languages
German (de)
English (en)
Other versions
EP0310134B1 (fr
EP0310134A3 (en
Inventor
Heribert Dipl.-Landw. 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
Priority to AT88116284T priority Critical patent/ATE79664T1/de
Publication of EP0310134A2 publication Critical patent/EP0310134A2/fr
Publication of EP0310134A3 publication Critical patent/EP0310134A3/de
Application granted granted Critical
Publication of EP0310134B1 publication Critical patent/EP0310134B1/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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30585—Assemblies of multiple valves having a single valve for multiple output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3138—Directional control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/322—Directional control characterised by the type of actuation mechanically actuated by biasing means, e.g. spring-actuated
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/355—Pilot pressure control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Definitions

  • the invention relates to a hydraulic control device for the working hydraulics of a vehicle which can be used, in particular, in agriculture and construction, preferably for a constant current system with at least one control slide which can be fixed by a spring-loaded catch and can be hydraulically disengaged by the pressure in a control line and which, after being released, by means of a restoring force is automatically reset to its neutral position, the unlatching of the control spool is triggered when the operating pressure is reached at the switched-on consumer and is delayed by means of a delay device in the control line, which in turn is connected to the pump pressure line in the flow direction in front of the control spool in order to apply control pressure to the pump pressure line is.
  • each of the catches acting on the control valves is designed as part of a piston guided in a cylinder, which is operated by spring force in the blocking direction and by pressure fluid in the Unlocking sense is applied.
  • the hydraulic spaces of the catches are connected to one another by a control line, which is connected directly to the pump pressure line via a hydraulic delay device for supplying hydraulic fluid.
  • the delay device consists exclusively of hydraulic components, which, however, at least partially require special manufacture due to their mode of operation. A device made of such components is quite expensive.
  • the invention has for its object to provide a delay device for a hydraulic control device of the type outlined at the outset, which can be produced inexpensively without custom-made components using commercially available simple means.
  • control line for the detent behind the bias valve a pressure cell for actuating a switch and parallel to it via a throttle and a check valve parallel to the detent, an electromagnetically or spring-actuated two-way valve is connected, which in the open position Control line connects to the line leading from the control slide to another downstream control unit and that the switch of the pressure cell forms an electrical circuit with the electromagnetic actuator of the two-way valve in connection with a current source, which is controlled by a delay relay.
  • the electromagnetic two-way valve is loaded by a spring in the closing direction and that the switch of the pressure cell is in its unstressed state in the closed position and comes into the open position when the pressure in the pressure cell increases.
  • the electromagnetic two-way valve is loaded by a spring in the opening direction and that the switch of the pressure cell is in its open state in the open position and comes into the closed position when the pressure in the pressure cell rises.
  • the circuit formed from the electromagnetic actuator of the two-way valve, the switch of the pressure cell and the relay can be connected to the positive pole of a power source via a switch arranged in the ignition lock of the vehicle.
  • a control slide 1 designed as a multi-way valve is provided, which is used to actuate, for example, an actuating cylinder (not shown).
  • This hydraulic consumer is connected to lines 2, 3.
  • Springs 4 and 5 acting on both sides of the control slide 1 ensure the centering of the movable slide part in the neutral position shown.
  • the control slide 1 has a detent 6 which is effective in several switching positions and can be mechanically engaged by spring force and hydraulically disengaged.
  • the catch 6 has a plunger 8 which is loaded by the force of a spring 7 and which, depending on the switching position of the control slide 1, engages in one of a plurality of recesses 9 in a slide part 10.
  • the detent 6 For hydraulic actuation of the detent 6, it has a hydraulic actuator 11 which acts against the force of the spring 7 and which is coupled to a two-way valve 12.
  • a control line 14 provided for supplying the detent 6 with pressure fluid is connected to the actuator 11 by a line 15 and to the two-way valve 12 by a line 16 branching off the line 15.
  • the line 16 In the open position of the two-way valve 12 shown, which is caused by the spring 7, the line 16 is connected to the collecting container for pressure fluid by a throttle 17 arranged in the spool of the two-way valve 12 by a line 18 connected to the outlet side thereof.
  • the control slide 1 has on the output side through a line 27 a connection to the line 18, which in turn is connected via a line 28 to the collecting container 19.
  • a biasing valve 29 is used to supply the control line 14 with pressure fluid, which is connected on the input side to the pressure line 22 and on the output side through a line 30 to a pressure cell 31.
  • the control line 14 is connected to the line 30 by switching on a throttle 32 and a check valve 33.
  • the hydraulic system has an electrical delay device 35 for the hydraulic actuation of the catch 6.
  • the delay device 35 has a two-way valve 37 which is acted upon by the force of a spring 36 in the closing direction and which is actuated by an electromagnetic actuator 38 in the opening direction.
  • the two-way valve 3 is connected on the input side to the control line 14 and on the output side by a line 39 to the line 23 leading from the control slide 1 to the control unit 24.
  • a switch 40 actuated by the latter, which is closed when the pressure cell 31 is unloaded and is connected on the one hand via ground to the negative pole of a power source and on the other hand via a line 41 to the electromagnetic actuator 38 of the two-way valve 37.
  • the actuator 38 is also by a Line 42 and a fuse 43 are connected to the positive pole of a power source via a switch 44 operating in the ignition lock of the vehicle.
  • a relay 45 is used as the delay element, which is connected to ground at the negative pole of the current source with a connection 46. There are also connections of the delay relay 45 through a line 47 to line 42 and by a line 48 to line 41.
  • the switch 44 When starting the engine of the vehicle, the switch 44 is actuated in the closing direction, so that a circuit is closed by the line 42, the actuator 38, line 41 and the switch 40 in the closed position. As a result, the two-way valve 37 comes into the open position, so that the lines 14 and 39 come into connection with one another.
  • the hydraulic pump 20, which is constantly driven by the internal combustion engine, conveys hydraulic fluid through the pressure line 22 to the hydraulic system, so that when the control spool 1 is in neutral position, a circulating pressure is built up by the control unit 24 arranged at the end of the line 23, which pressure is then present in all lines connected directly to it.
  • control spool 1 If control spool 1 is now shifted from the neutral position shown into an adjacent working position, then the consumer connected to lines 2, 3 is pressurized with pressurized liquid, while at the same time the inflow of pressurized liquid to line 23 or to control controller 24 is interrupted. The line 23 is therefore depressurized. If the control slide 1 reaches the desired working position during its displacement, then the plunger 8 of the catch 6 engages in the corresponding recess 9 on the slide part 10 by the force of the spring 7. When supplying the on the spool 1 closed consumer, for example an actuating cylinder, the pressure in line 22 rises when the piston is in the final position in the actuating cylinder, so that finally the preload valve 29 connected to line 22 opens at a predetermined pressure and releases pressure fluid into control line 30.
  • a pressure is built up in the control line 30 so that hydraulic fluid passes through the throttle 32 and the check valve 33 into the control line 14.
  • No significant pressure can initially build up in the control line 14, since pressure fluid can continuously flow from the control line 14 through the open two-way valve 37 to line 23 and through lines 15, 16 and the throttle 17 in the two-way valve 16 to the return.
  • the switch 40 Due to the pressure increase in the control line 30, the switch 40 is opened via the pressure cell 31, so that the circuit closed via this is interrupted.
  • the delay relay 45 keeps the circuit closed for a time via the electromagnetic actuator 38, so that the two-way valve 37 initially remains in the open position.
  • the pressure reduction leads to the opening of the switch 40 via the pressure cell 31, so that the two-way valve 37 opens and releases the direct paths from the control line 14 to the lines 39 and 23 pressurized with circulating pressure.
  • the hydraulic system is now back in the starting position and a new switching operation can take place on the control slide 1.
  • FIG. 2 shows a delay device 50, the structure of which essentially corresponds to that of the delay device 35 in FIG. 1.
  • the delay device 50 uses a delay relay 51 which closes a circuit with a delay when its excitation current is switched on.
  • a two-way valve 52 is provided, which is actuated by the force of a spring 53 in the opening direction and by an electromagnetic actuator 54 in the closing direction.
  • On the pressure cell 55 of this device there is a switch 56 which is in the starting position, i.e. with the pressurized can 55 in the open position.
  • the operation of this delay device 50 is such that the switch 56 closes at a certain pressure in the pressure cell 55, so that the delay relay 51 moves the two-way valve 52 against the force of the spring 53 with a delay in the closing direction against the force of the spring 53.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Vehicle Body Suspensions (AREA)
EP88116284A 1987-10-02 1988-10-01 Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile Expired - Lifetime EP0310134B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88116284T ATE79664T1 (de) 1987-10-02 1988-10-01 Hydraulische steuereinrichtung fuer die arbeitshydraulik eines land- und bauwirtschaftlich nutzbaren fahrzeugs.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3733371 1987-10-02
DE19873733371 DE3733371A1 (de) 1987-10-02 1987-10-02 Hydraulische steuereinrichtung fuer die arbeitshydraulik eines land- und bauwirtschaftlich nutzbaren fahrzeugs

Publications (3)

Publication Number Publication Date
EP0310134A2 true EP0310134A2 (fr) 1989-04-05
EP0310134A3 EP0310134A3 (en) 1990-04-25
EP0310134B1 EP0310134B1 (fr) 1992-08-19

Family

ID=6337498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116284A Expired - Lifetime EP0310134B1 (fr) 1987-10-02 1988-10-01 Système de commande hydraulique pour véhicules utilisés dans l'agriculture et la construction civile

Country Status (3)

Country Link
EP (1) EP0310134B1 (fr)
AT (1) ATE79664T1 (fr)
DE (2) DE3733371A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2169273A1 (fr) * 2008-09-26 2010-03-31 Zf Friedrichshafen Ag Dispositif d'arrêt pour un coulisseau de soupape
CN101660551B (zh) * 2009-09-25 2011-08-24 中国北方车辆研究所 油气悬挂液压闭锁装置
CN103352889B (zh) * 2013-07-08 2015-07-01 太原理工大学 一种扒渣机液压系统冲击的缓冲方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2440949A (en) 2006-08-15 2008-02-20 Agco Gmbh Spool valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646968A (en) * 1970-09-30 1972-03-07 Sperry Rand Corp Power transmission valve with detent
US3716075A (en) * 1971-10-12 1973-02-13 Parker Hannifin Corp Power assist mechanism for fluid control valves
US4195551A (en) * 1977-06-23 1980-04-01 Gresen Manufacturing Company Hydraulic control valve including electromagnetic detent
DE3125482A1 (de) * 1981-06-29 1983-01-13 Günter Till Präzisionsmechanik, 3330 Helmstedt "steuerschieber"

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3203465A1 (de) * 1982-02-03 1983-08-11 Klöckner-Humboldt-Deutz AG, 5000 Köln Druckmittelkreislauf, insbesondere fuer ein maehwerk
DE8311270U1 (de) * 1982-04-16 1983-11-17 Steyr-Daimler-Puch AG, 1011 Wien Vorrichtung zum Betätigen des hydraulischen Kolbentriebes eines Zusatzgerätes, insbesondere für Ackerschlepper
DE3334253A1 (de) * 1983-09-22 1985-04-04 Klöckner-Humboldt-Deutz AG, 5000 Köln Hydraulische steuereinrichtung fuer die arbeitshydraulik von traktoren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646968A (en) * 1970-09-30 1972-03-07 Sperry Rand Corp Power transmission valve with detent
US3716075A (en) * 1971-10-12 1973-02-13 Parker Hannifin Corp Power assist mechanism for fluid control valves
US4195551A (en) * 1977-06-23 1980-04-01 Gresen Manufacturing Company Hydraulic control valve including electromagnetic detent
DE3125482A1 (de) * 1981-06-29 1983-01-13 Günter Till Präzisionsmechanik, 3330 Helmstedt "steuerschieber"

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
\lhydraulik und Pneumatik, Band 22, Nr. 9 1978, Mainz Seiten 511-514 H. Harms, B. Scheuffler: "Zur Entwicklung der Hydrostatik in Landmaschinen und Ackerschleppern" *
\lhydraulik und Pneumatik, Band 28, Nr. 5 1984, Mainz W. Kötter "Anforderungen an hydraulische Zusatzventile für Ackerschlepper" Seiten 325-329 *
\lhydraulik und Pneumatik, Band 30, Nr. 11 1986, Mainz, Seiten 815-820 H. Garbers "Belastungsgrössen und Leistungsbilanzen von Schlepperhydraulik-Systemen" *
Landtechnik, Band 38, Nr. 6 1983, Hannover W. Kötter "Anforderungen an hydraulische Zusatzventile für Ackerschlepper" Seiten 238-242 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2169273A1 (fr) * 2008-09-26 2010-03-31 Zf Friedrichshafen Ag Dispositif d'arrêt pour un coulisseau de soupape
CN101660551B (zh) * 2009-09-25 2011-08-24 中国北方车辆研究所 油气悬挂液压闭锁装置
CN103352889B (zh) * 2013-07-08 2015-07-01 太原理工大学 一种扒渣机液压系统冲击的缓冲方法

Also Published As

Publication number Publication date
EP0310134B1 (fr) 1992-08-19
ATE79664T1 (de) 1992-09-15
EP0310134A3 (en) 1990-04-25
DE3733371A1 (de) 1989-04-13
DE3873868D1 (de) 1992-09-24

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