EP1067296A1 - Elektrohydraulischer Hubmodul - Google Patents
Elektrohydraulischer Hubmodul Download PDFInfo
- Publication number
- EP1067296A1 EP1067296A1 EP00112802A EP00112802A EP1067296A1 EP 1067296 A1 EP1067296 A1 EP 1067296A1 EP 00112802 A EP00112802 A EP 00112802A EP 00112802 A EP00112802 A EP 00112802A EP 1067296 A1 EP1067296 A1 EP 1067296A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- consumer
- function
- control valve
- proportional
- 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
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Classifications
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- 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
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- 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
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
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- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
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- 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
- F15B2211/30505—Non-return valves, i.e. check valves
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- 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
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
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- 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
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- 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
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- 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
- F15B2211/40576—Assemblies of multiple valves
- F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
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- 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
- F15B2211/4159—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source, an output member and a return line
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- 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
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- 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
- F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
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- 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
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- 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
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
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- 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
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
- F15B2211/50527—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves using cross-pressure relief valves
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- 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
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
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- 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
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
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- 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
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve
- F15B2211/5154—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an output member
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- 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
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5158—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and an output member
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- 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
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
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- 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
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves
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- 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
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
Definitions
- the invention relates to an electro-hydraulic lifting module in the preamble of Claim 1 specified type.
- This type of lifting module is a second supply pump for actuation provided by the consumer of the secondary function.
- This additional supply pump is expensive.
- In order to be able to control the secondary function there is also the hydraulic one Control circuit complex. This is a disadvantage due to energy recovery or the saving is not outweighed.
- an electrohydraulic lifting module known from EP 0 669 281 A for a Industrial truck with a mast is provided a single pump, which in the Lowering operation of the main consumer in a monitored by a pressure compensator Secondary line drives a generator.
- a single pump which in the Lowering operation of the main consumer in a monitored by a pressure compensator Secondary line drives a generator.
- a pilot operated bypass valve between a return connection to the pump and the tank provided to prevent depending on the lowering pressure when lowering displaced pressure medium is pressed again by the pump.
- a lifting module according to GB 13 65 511, the main consumer is in lowering mode with energy recovery no secondary consumers with the displaced Pressure medium supplied.
- the invention has for its object an electro-hydraulic lifting module type mentioned with an efficient energy saving mode of the supply pump to accomplish.
- the supply pump intervenes. Is not a consumer of a secondary function to press, then the total pressure difference between the pressure level of the consumer of the main lifting function and the tank pressure level for energy recovery used.
- Only a single supply pump enables a relative simple hydraulic control circuit with a special connection anyway for the functions of the necessary components and thus a structurally simple electrohydraulic Lifting module, which is particularly useful for reach trucks is.
- the electric motor of the only supply pump is in its energy saving mode used on the control side so that it either supplies electricity as a generator or additionally draws electricity.
- the control valve component is the lifting process of the consumer controlled the main lifting function when the supply pump is driven, in energy saving mode the supply pump divides the three-way proportional current control device to the consumer of the secondary function the required amount too.
- the first and second control pressures for the pressure compensator the current control device from the pressure supply line for the consumer tapped the secondary function, so that here the pressure conditions in the direct connection to the tank, in which direct connection the control valve component to lift the consumer of the main lifting function, have no influence. This allows smooth transitions between the energy saving mode and control the supply mode.
- this control valve component is a simple 2/2-way or directional control valve or, if appropriate, a 2/2 proportional control valve.
- this control valve component can provide the main lifting function for a clean ramp control of the consumer the speed control of the supply pump can be used.
- the second case can control a clean ramp function via the proportional directional control valve without the supply pump having to make any significant contribution.
- the crossing point is located in the direct connection to the tank Control valve component, it should be expediently structurally simple 3/2-way control valve in black / white design (two switch positions: for Tank open or open to the consumer) or a one that controls a ramp function 3/2 proportional directional control valve.
- control valve component should be able to control a clean ramp function be a 2/2 proportional directional control valve in the secondary line.
- a simple 2/2-black / white control valve is sufficient, because the flow control device may be necessary and / or the control valve component in the direct connection at Participate in sinks.
- the system pressure is - as usual - through a pressure relief valve on the pressure side of the supply pump.
- a pressure protection provided, namely by a second either between the pressure supply line intended for the consumer of the secondary function and the tank, then set lower pressure relief valve, or one in the control line for the first control pressure of the pressure compensator positioned pressure relief valve.
- the three-way proportional flow control device when not operated of the consumer of the secondary function reliably blocks the second Pressure relief valve through a relief line containing a throttle bypassed the first control pressure.
- the throttle in the discharge line is dimensioned that even the pilot valve's first control pressure is low is reported.
- the Consumer VH is, for example, the lifting cylinder, while the consumer.
- VN e.g. is the so-called initial lift cylinder.
- It is a single supply pump P provided for lifting control by a speed-controllable electric motor M is driven. This supply pump P is in addition to the supply mode for energy recovery (electrical energy) or energy saving in one Energy saving mode operable.
- a line 1 leads in the lifting module core area HM (dash-dotted line) from the pressure side of the supply pump P to the input of a three-way proportional flow control device SR adjustable by a proportional magnet m1p is.
- the system pressure is indicated by a Pressure relief valve 3 monitored.
- a pressure supply line 5 is connected to the consumer VH, in which is arranged in the backflow direction blocking check valve 6.
- a control valve component 10 arranged for lifting control of the consumer VH, which in the Embodiment of FIG. 1 designed as a 2/2-way directional control valve 30 and is equipped with a proportional magnet m3p for adjustment.
- a return line 11 to the tank T.
- the second pressure relief valve 3a is bypassed by a control line loop 13, in which a throttle point 14 is provided is.
- the second pressure relief valve 3a and the control line 12 are shown here as Appropriate option provided.
- the consumer VH for the main lifting function is by a so-called lowering brake B monitors that also for a limitation of the maximum outflow at Lowering is responsible.
- a further control valve component 9 for the Lowering control is included, namely a 2/2 proportional directional control valve with a Proportional magnets m2p.
- the secondary line 8 leads between one in the direction to the tank T blocking check valve R and the supply pump P to Suction side of the supply pump 3.
- Each directional control valve W (in FIG. 1 a simple directional or directional control valve) of a consumer VN for the secondary function is to the pressure supply line 15 connected to a pressure line 16, and to the return line 11 with a Return line 17.
- the consumer VH In the basic position shown in FIG. 1, the consumer VH is against the load F. lift without actuating a consumer VN, then when the supply pump is driven P the control valve component 10 for lifting from the open position adjusted in the direction of the shut-off position (by means of the proportional magnet m3p), so that 5 pressure builds up in the pressure supply line.
- the current control device SR only directs the pressure and the quantity to crossing point 4.
- the Control valve component 9 remains in the shut-off position shown.
- the lowering brake B is bypassed by the opening check valve; the consumer VH extends in the lifting direction.
- the control takes place depending on the current supply of the proportional magnet m3p; if necessary, the speed of the electric motor M used to control a clean ramp function and the desired one Speed. If a secondary function is controlled at the same time, then the necessary pressure medium in the pressure supply line 15 through Energizing the proportional magnet m1p provided, where appropriate then the speed of the electric motor M is increased.
- control valve component 10 moves in the direction again adjusted to the open position and, if no secondary function can be controlled the electric motor M must also be switched off. Is still a secondary function too control, this can be done by controlling the speed of the supply pump P and The proportional magnet m1p is energized. If necessary, it will also held the control valve component 10 in the shut-off position.
- the electric motor M remains switched off, opens the Flow control device SR only at crossing point 4, the control valve component 10 held in the open position, and becomes the control valve component 9 from the shut-off position shown in the direction of the passage position adjusted, using the proportional magnet m2p. Because the check valve R then blocks, the pressure medium displaced by the secondary line 8 pressed by the supply pump P, which acts as the hydraulic motor, the electric motor M drives as a generator for energy recovery.
- the supply pump P passing pressure medium flows through line 1, the flow control device SR and the direct connection 2 via the control valve component 10 to the tank T.
- the supply pump P is also during this energy recovery mode to control a secondary function, the proportional magnet m1p becomes corresponding energized to lead the required amount into the pressure supply line 15, from which the consumer VN via his directional or directional control valve W is operated. Pressure medium displaced from a consumer VN flows over the Return line 17 and the return line 11 directly to the tank. With this control the Secondary function, it is not necessary to drive the supply pump P as long the pressure potential in the displaced pressure medium is sufficient. If not If so, the supply pump P intervenes.
- FIG. 2 differs from that of FIG. 1 in that the control valve component 10 for the lifting control is a simple 2/2-way control valve 31 with a simple switching magnet m3. To still be one clean lifting control of the consumer VH (appropriate ramp function) achieve, the speed control of the electric motor M is used. The further construction is equal to.
- the three-way proportional current control device is different from the illustration in FIG. 1 SR shown in detail, with a pressure compensator D and one downstream of the pressure compensator D in the pressure supply line 15 the proportional magnet m1p adjustable measuring aperture MB.
- the one on the orifice plate MB set pressure difference holding pressure compensator D is from first and second control pressures and a control spring 20 set and holds the set Pressure difference even with pressure fluctuations in line 1 and / or 15.
- the first Control pressure acts together with the control spring 20 in the opening direction of the pressure compensator D from line 1 to pressure supply line 15.
- the first control pressure comes from a control line 12a, which from the at the intersection 18 of the Pressure supply line 15 branching control line 12 with the second pressure relief valve 3a branches.
- the crossing point 18 is located downstream of the Measuring aperture MB.
- the second control pressure is upstream at a crossing point 21 the measuring orifice MB tapped in the pressure supply line 15 via a control line 22 transferred to the other side of the pressure compensator D and acts on it in the opening direction from the pressure line 1 to the direct connection 2 to the tank T.
- the first and second control pressures can only be tapped in the circle of the secondary function, have the pressure ratios in lines 1, 2 or in the pressure supply line 5 to the consumer VH has no influence on the control intervention of the current control device SR.
- control valve component 10 for lifting control the crossing point 4 'between the direct connection 2 and the pressure supply line 5 contains and for this purpose as a 3/2-way control valve 32 without a proportional function and is formed with a switching magnet m3.
- the check valve 6 replaced by the seat valve function 6 '.
- the directional and directional control valves W of the consumer VN for the secondary functions are simple directional control valves without proportional function, each Consumer VN via working lines 23, 24 to the directional or directional control valve W is connected.
- FIG. 4 corresponds functionally to the embodiment of FIG. 2 with the control valve component designed as a simple 2/2-way control valve 31 10, which is adjustable by means of a switching magnet m3.
- the orifice plate required for the pressure compensator D. not included in the pressure supply line 15, but will be proportional adjustable orifice plate with a directional or directional control valve WP for the Consumer VN formed the secondary function, which is a proportional control valve with the Proportional magnet m1p (and, if necessary, a feed regulator, not shown).
- control valve component 10 is for the lift control 3/2-way control valve of simple design with a solenoid m3. Indeed it is not a poppet valve, but a slide valve in which the crossing point 4 'to the pressure supply line 5 is also included.
- control valve component 9 could be in the secondary line 8 a simple 2/2 black and white directional control valve with a simple one Switch solenoids (without proportional function).
- control valve component 10 for lifting control is a 3/2 proportional directional control valve 34 with at least one proportional magnet m3p in slide construction and with a control function (indicated by the parallel lines).
Abstract
Description
- Fig. 1
- ein Blockdiagramm einer ersten Ausführungsform eines Hubmoduls in drucklosem Zustand,
- Fig. 2
- ein Blockdiagramm einer weiteren Ausführungsform, wobei in Fig. 2 die in Fig. 1 nur symbolisch dargestellte Dreiwege-Proportional-Stromregeleinrichtung im Detail angedeutet ist,
- Fig. 3
- ein Blockschaltbild einer weiteren Ausführungsform eines Hubmoduls,
- Fig. 4
- eins Blockdiagramm einer weiteren Ausführungsform eines Hubmoduls,
- Fig. 5
- einen Teil einer weiteren Ausführungsform, und
- Fig. 6
- einen Teil einer noch weiteren Ausführungsform eines solchen Hubmoduls.
Claims (14)
- Elektrohydraulischer Hubmodul (S), insbesondere für ein Flurförderfahrzeug wie einen Schubmaststapler, mit einer durch einen Elektromotor (M) antreibbaren Versorgungspumpe (P), die in einem Versorgungsmodus und in einem Energiespar-Modus betreibbar ist, und an die wahlweise Druckversorgungsleitungen (5, 15) wenigstens eines Verbrauchers (VH) einer Haupthebefunktion und wenigstens eines Verbrauchers (VN) einer Nebenfunktion anschließbar sind, mit einem in Rückströmrichtung zum Tank blockierten Nebenstrang (8) vom Verbraucher (VH) der Haupthebefunktion über die Versorgungspumpe (P) zu einer Direktverbindung (2) zum Tank, wobei der Verbraucher (VN) der Nebenfunktion auch im Energiespar-Modus der Versorgungspumpe (P) betätigbar ist, dadurch gekennzeichnet, dass nur eine einzige Versorgungspumpe (P) vorgesehen ist, und dass der Verbraucher (VN) der Nebenfunktion im Energiespar-Modus der Versorgungspumpe (P) zumindest anteilig mit aus dem Verbraucher (VH) der Haupthebefunktion mit Druck über den Nebenstrang (8) und durch die Versorgungspumpe (P) verdrängtem Druckmittel betätigbar ist.
- Hubmodul nach Anspruch 1, dadurch gekennzeichnet, dass an der Druckseite der Versorgungspumpe (P) eine Dreiwege-Proportional-Stromregeleinnchtung (SR) vorgesehen ist, an die abströmseitig die Druckversorgungsleitungen (5, 15) aller Verbraucher (VH, VN) und die Direktverbindung (2) zum Tank (T) angeschlossen sind, und dass eine die Direktverbindung (2) zum Tank überwachende, in Strömungsrichtung im Nebenstrang stromab der Dreiwege-Proportional-Stromregeleinrichtung (SR) angeordnete Steuerventil-Komponente (10) zur Hebesteuerung der Haupthebefunktion vorgesehen ist.
- Hubmodul nach Anspruch 2, dadurch gekennzeichnet, dass die Dreiwege-Proportional-Stromregeleinrichtung (SR) eine Druckwaage (D) und eine Proportional-Messblende (MB) aufweist, dass die Druckwaage in Öffnungsrichtung zur Druckversorgungsleitung (15) des Verbrauchers (VN) der Nebenfunktion von einer Regelfeder (20) und einem ersten Steuerdruck stromab der Proportional-Messblende (MB) und in Öffnungsrichtung zur Druckversorgungsleitung (5) des Verbrauchers (VH) der Haupthebefunktion mit einem zweiten Steuerdruck stromauf der Proportional-Messblende (MB) beaufschlagt ist.
- Hubmodul nach Anspruch 3, dadurch gekennzeichnet, dass die Proportional-Messblende (MB) in der Druckversorgungsleitung (15) des Verbrauchers (VN) der Nebenfunktion angeordnet ist, und dass für den Verbraucher (VN) ein einfaches Richtungssteuerventil (W) vorgesehen ist.
- Hubmodul nach den Ansprüchen 1 und 3, dadurch gekennzeichnet, dass für den Verbraucher (VN) der Nebenfunktion ein Proportional-Wegesteuerventil (WP) vorgesehen ist, und dass der erste Steuerdruck der Lastdruck des Verbrauchers (VN) stromab des Proportional-Wegesteuerventils (WP) ist.
- Hubmodul nach Anspruch 1, dadurch gekennzeichnet, dass eine Steuerventil-Komponente (10) des Verbrauchers (VH) der Haupthebefunktion in der Direktverbindung (2) zum Tank stromab eines Kreuzungspunktes (4) vorgesehen ist, von dem die Druckversorgungsleitung (5) zum Verbraucher (VH) der Haupthebefunktion führt.
- Hubmodul nach Anspruch 1, dadurch gekennzeichnet, dass eine Steuerventil-Komponente (10) des Verbrauchers (VH) der Haupthebefunktion in der Direktverbindung (2) zum Tank vorgesehen ist und einen Kreuzungspunkt (4') enthält, von dem die Druckversorgungsleitung (5) zum Verbraucher (VH) der Haupthebefunktion führt.
- Hubmodul nach Anspruch 6, dadurch gekennzeichnet, dass die Steuerventil-Komponente (10) ein 2/2-Schwarz/Weiß-Richtungssteuerventil (31) oder ein 2/2-Proportional-Richtungssteuerventil (30) ist.
- Hubmodul nach Anspruch 7, dadurch gekennzeichnet, dass die Steuerventil-Komponente (10) ein 3/2-Schwarz/Weiß-Richtungssteuerventil (33) oder ein 3/2-Proportional-Richtungssteuerventil (34) ist.
- Hubmodul nach Anspruch 1, dadurch gekennzeichnet, dass der Verbraucher (VH) der Haupthebefunktion durch ein die maximale Einfahrgeschwindigkeit unter Last begrenzendes Senkbremsventil (B) abgesichert ist.
- Hubmodul nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zur Senksteuerung des Verbrauches (VN) im Nebenstrang (8) ein 2/2-Proportional-Richtungssteuerventil (9) oder ein 2/2-Schwarz/Weiß-Richtungssteuerventil vorgesehen ist.
- Hubmodul nach Anspruch 1, dadurch gekennzeichnet, dass zusätzlich zu einem auf Druckniveau des Verbrauchers (VH) der Haupthebefunktion abgestimmten Druckbegrenzungsventil (3) stromab der Proportional-Stromregeleinnchtung (SR) ein zweites, auf das ggfs. niedrigere Druckniveau des Verbrauchers (VN) für die Nebenfunktion abgestimmtes Druckbegrenzungsventil (3a) vorgesehen ist.
- Hubmodul nach Anspruch 13, dadurch gekennzeichnet, dass das zweite Druckbegrenzungsventil (3a) zwischen der Druckversorgungsleitung (15) des Verbrauchers (VN) für die Nebenfunktion und dem Tank (T) vorgesehen oder in einer Steuerleitung (12, 12a) für den ersten Steuerdruck angeordnet ist.
- Hubmodul nach den Ansprüchen 12 oder 13, dadurch gekennzeichnet, dass das zweite Druckbegrenzungsventil (3a) zum Tank (T) durch eine eine Drosselstelle (14) enthaltende Entlastungsleitung (13) für den ersten Steuerdruck umgangen wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE29911686U | 1999-07-06 | ||
DE29911686U DE29911686U1 (de) | 1999-07-06 | 1999-07-06 | Elektrohydraulischer Hubmodul |
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EP1067296A1 true EP1067296A1 (de) | 2001-01-10 |
EP1067296B1 EP1067296B1 (de) | 2004-12-29 |
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EP00112802A Expired - Lifetime EP1067296B1 (de) | 1999-07-06 | 2000-06-16 | Elektrohydraulischer Hubmodul |
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DE (2) | DE29911686U1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1967485A1 (de) * | 2007-03-06 | 2008-09-10 | Jungheinrich Aktiengesellschaft | Flurförderzeug |
EP2058270A1 (de) | 2007-11-06 | 2009-05-13 | HAWE Hydraulik SE | Elektrohydraulische Hubvorrichtung |
EP2062848A1 (de) | 2007-11-21 | 2009-05-27 | HAWE Hydraulik SE | Elektrohydraulischer Hubmodul |
DE102018112835A1 (de) | 2018-05-29 | 2019-12-05 | Fsp Fluid Systems Partner Holding Ag | Hydrauliksystem, Hydraulikeinheit, Fahrzeug, Verfahren und Verwendung |
WO2020011959A1 (en) * | 2018-07-11 | 2020-01-16 | Parker Hannifin Emea S.À.R.L. | A hydraulic system for a load handling vehicle |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10010670C2 (de) * | 2000-03-04 | 2003-11-06 | Jungheinrich Ag | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
DE10224731B4 (de) * | 2001-06-29 | 2012-09-20 | Linde Material Handling Gmbh | Hydrostatisches Antriebssystem |
DE102004011913B4 (de) * | 2004-03-11 | 2005-12-29 | Jungheinrich Ag | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
DE102006003414B3 (de) * | 2006-01-24 | 2007-08-02 | Sauer-Danfoss Gmbh & Co Ohg | Hydraulische Schaltungsanordnung |
EP3171039A1 (de) * | 2015-11-18 | 2017-05-24 | HAWE Hydraulik SE | Hydraulisches hubmodul mit hebe- und senkfunktion |
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GB1365511A (en) | 1972-05-04 | 1974-09-04 | Conveyancer Ltd | Energy recovery systems |
JPS6434627A (en) | 1987-07-30 | 1989-02-06 | Tsudakoma Ind Co Ltd | Pallet clamp equipment of machine tool |
JPH02215700A (ja) | 1989-02-14 | 1990-08-28 | Toyota Autom Loom Works Ltd | バッテリ式産業車両における油圧装置 |
DE9218483U1 (de) | 1992-11-06 | 1994-04-28 | Honeywell Ag | Hub- und Senkeinrichtung |
EP0669281A1 (de) | 1994-01-29 | 1995-08-30 | Jungheinrich Aktiengesellschaft | Hydraulische Hubvorrichtung für batteriegetriebene Flurförderzeuge |
EP0908413A2 (de) | 1997-10-08 | 1999-04-14 | Still Wagner GmbH & Co. KG | Fluförderzeug mit einer Lastaufnahmevorrichtung und Verfahren zum Absenken der Lastaufnahmevorrichtung |
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- 1999-07-06 DE DE29911686U patent/DE29911686U1/de not_active Expired - Lifetime
-
2000
- 2000-06-16 EP EP00112802A patent/EP1067296B1/de not_active Expired - Lifetime
- 2000-06-16 DE DE50009076T patent/DE50009076D1/de not_active Expired - Lifetime
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GB1365511A (en) | 1972-05-04 | 1974-09-04 | Conveyancer Ltd | Energy recovery systems |
JPS6434627A (en) | 1987-07-30 | 1989-02-06 | Tsudakoma Ind Co Ltd | Pallet clamp equipment of machine tool |
JPH02215700A (ja) | 1989-02-14 | 1990-08-28 | Toyota Autom Loom Works Ltd | バッテリ式産業車両における油圧装置 |
DE9218483U1 (de) | 1992-11-06 | 1994-04-28 | Honeywell Ag | Hub- und Senkeinrichtung |
EP0669281A1 (de) | 1994-01-29 | 1995-08-30 | Jungheinrich Aktiengesellschaft | Hydraulische Hubvorrichtung für batteriegetriebene Flurförderzeuge |
EP0908413A2 (de) | 1997-10-08 | 1999-04-14 | Still Wagner GmbH & Co. KG | Fluförderzeug mit einer Lastaufnahmevorrichtung und Verfahren zum Absenken der Lastaufnahmevorrichtung |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1967485A1 (de) * | 2007-03-06 | 2008-09-10 | Jungheinrich Aktiengesellschaft | Flurförderzeug |
EP2058270A1 (de) | 2007-11-06 | 2009-05-13 | HAWE Hydraulik SE | Elektrohydraulische Hubvorrichtung |
EP2062848A1 (de) | 2007-11-21 | 2009-05-27 | HAWE Hydraulik SE | Elektrohydraulischer Hubmodul |
DE102018112835A1 (de) | 2018-05-29 | 2019-12-05 | Fsp Fluid Systems Partner Holding Ag | Hydrauliksystem, Hydraulikeinheit, Fahrzeug, Verfahren und Verwendung |
WO2019229068A1 (de) | 2018-05-29 | 2019-12-05 | Fsp Fluid Systems Partners Holding Ag | Hydrauliksystem, hydraulikeinheit, fahrzeug, verfahren und verwendung |
US11312202B2 (en) | 2018-05-29 | 2022-04-26 | Argo-Hytos Group Ag | Hydraulic system, hydraulic unit, vehicle, method and use |
WO2020011959A1 (en) * | 2018-07-11 | 2020-01-16 | Parker Hannifin Emea S.À.R.L. | A hydraulic system for a load handling vehicle |
Also Published As
Publication number | Publication date |
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DE50009076D1 (de) | 2005-02-03 |
EP1067296B1 (de) | 2004-12-29 |
DE29911686U1 (de) | 1999-09-16 |
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