EP1351879A2 - Control device for a working device connected to a hydraulic circuit - Google Patents
Control device for a working device connected to a hydraulic circuitInfo
- Publication number
- EP1351879A2 EP1351879A2 EP02708269A EP02708269A EP1351879A2 EP 1351879 A2 EP1351879 A2 EP 1351879A2 EP 02708269 A EP02708269 A EP 02708269A EP 02708269 A EP02708269 A EP 02708269A EP 1351879 A2 EP1351879 A2 EP 1351879A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- pressure
- valve
- hydraulic circuit
- pilot
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- 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
- F15B11/003—Systems with load-holding valves
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/41—Flow control characterised by the positions of the valve element
- F15B2211/413—Flow control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
-
- 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41581—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a return line
-
- 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
-
- 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow control characterised by the type of actuation actuated by fluid 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
- F15B2211/40—Flow control
- F15B2211/455—Control of flow in the feed line, i.e. meter-in 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
- F15B2211/40—Flow control
- F15B2211/46—Control of flow in the return line, i.e. meter-out 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
- F15B2211/50—Pressure control
- F15B2211/575—Pilot pressure control
- F15B2211/5756—Pilot pressure control for opening a valve
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7052—Single-acting output members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S91/00—Motors: expansible chamber type
- Y10S91/02—Exhaust throttled motor control
Definitions
- This force booster 56 is necessary in order to achieve a complete opening of the control valve 28 and thus the lowest possible flow resistance when lowering the load without loading (load pressures under ⁇ 8 bar under certain circumstances). This takes into account the requirement that the load reduction function must function without a running pump, ie the primary pressure supply of the proportional pressure reducer 36 can only be done by means of The load pressure is tapped. Therefore, when lowering without loading, the pilot pressure can never be higher than the current load pressure.
- the piston side of the force converter 58 is connected to the pilot circuit 40 in a fluid-carrying manner and the rod side is connected to the tank in a fluid-carrying manner. Furthermore, the force transmission piston 58 is operatively connected to the other switching parts of the seat valve via its control rod.
- a corresponding orifice or throttle with an adjustable cross-section can be used, which supplies the required control pressure difference for the pressure compensator 26.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10102409 | 2001-01-15 | ||
DE10102409A DE10102409A1 (en) | 2001-01-15 | 2001-01-15 | Control device for a working device connected to a hydraulic circuit |
PCT/EP2002/000155 WO2002055426A2 (en) | 2001-01-15 | 2002-01-10 | Control device for a working device connected to a hydraulic circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1351879A2 true EP1351879A2 (en) | 2003-10-15 |
EP1351879B1 EP1351879B1 (en) | 2006-11-29 |
Family
ID=7671147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02708269A Expired - Lifetime EP1351879B1 (en) | 2001-01-15 | 2002-01-10 | Fork lift with control device |
Country Status (6)
Country | Link |
---|---|
US (1) | US7040215B2 (en) |
EP (1) | EP1351879B1 (en) |
JP (1) | JP4094954B2 (en) |
AT (1) | ATE346819T1 (en) |
DE (2) | DE10102409A1 (en) |
WO (1) | WO2002055426A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10235982B3 (en) * | 2002-08-06 | 2004-01-22 | Weiler Werkzeugmaschinen Gmbh | Drive for linearly movable components of a machine tool |
DE10253492A1 (en) * | 2002-11-16 | 2004-05-27 | Zf Friedrichshafen Ag | Car clutch hydraulic actuator operational readiness preparation unit, has hydraulic pistons with valve controlled fluid link impedance and flow |
FR2902684B1 (en) * | 2006-06-27 | 2010-02-26 | Montabert Roger | METHOD FOR SWITCHING THE STROKE STROKE OF A MU-PERCUSSION APPARATUS BY AN INCOMPRESSIBLE FLUID UNDER PRESSURE, AND APPARATUS FOR CARRYING OUT SAID METHOD |
DE102012010522A1 (en) * | 2012-05-25 | 2013-11-28 | Hydac Fluidtechnik Gmbh | Valve for valve arrangement |
DE102012015354A1 (en) | 2012-08-03 | 2014-05-15 | Hydac Fluidtechnik Gmbh | Valve, in particular pilot-operated proportional directional seat valve |
DE102012015356A1 (en) | 2012-08-03 | 2014-05-15 | Hydac Fluidtechnik Gmbh | Valve, in particular pilot-operated proportional directional seat valve |
DE102013206977A1 (en) * | 2013-04-18 | 2014-11-06 | Robert Bosch Gmbh | Flow control valve assembly |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3126031A (en) * | 1964-03-24 | hayner | ||
US4250794A (en) * | 1978-03-31 | 1981-02-17 | Caterpillar Tractor Co. | High pressure hydraulic system |
DE3708143C1 (en) * | 1987-03-13 | 1988-09-01 | Rexroth Mannesmann Gmbh | Safety circuit for the control circuit of a power lift |
DE4239321C2 (en) * | 1992-11-23 | 1995-11-09 | Heilmeier & Weinlein | Electro-hydraulic lifting module |
DE29508392U1 (en) | 1995-05-19 | 1995-08-10 | Heilmeier & Weinlein | Electro-hydraulic lifting module |
-
2001
- 2001-01-15 DE DE10102409A patent/DE10102409A1/en not_active Withdrawn
-
2002
- 2002-01-10 WO PCT/EP2002/000155 patent/WO2002055426A2/en active IP Right Grant
- 2002-01-10 US US10/466,301 patent/US7040215B2/en not_active Expired - Lifetime
- 2002-01-10 JP JP2002556114A patent/JP4094954B2/en not_active Expired - Fee Related
- 2002-01-10 AT AT02708269T patent/ATE346819T1/en active
- 2002-01-10 DE DE50208840T patent/DE50208840D1/en not_active Expired - Lifetime
- 2002-01-10 EP EP02708269A patent/EP1351879B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02055426A2 * |
Also Published As
Publication number | Publication date |
---|---|
US7040215B2 (en) | 2006-05-09 |
US20040065081A1 (en) | 2004-04-08 |
ATE346819T1 (en) | 2006-12-15 |
EP1351879B1 (en) | 2006-11-29 |
JP2004517016A (en) | 2004-06-10 |
WO2002055426A2 (en) | 2002-07-18 |
WO2002055426A3 (en) | 2002-09-19 |
DE50208840D1 (en) | 2007-01-11 |
JP4094954B2 (en) | 2008-06-04 |
DE10102409A1 (en) | 2002-07-25 |
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