EP1004542A1 - Hydraulische Anlage insbesondere für ein Flurförderzeug - Google Patents
Hydraulische Anlage insbesondere für ein Flurförderzeug Download PDFInfo
- Publication number
- EP1004542A1 EP1004542A1 EP99123341A EP99123341A EP1004542A1 EP 1004542 A1 EP1004542 A1 EP 1004542A1 EP 99123341 A EP99123341 A EP 99123341A EP 99123341 A EP99123341 A EP 99123341A EP 1004542 A1 EP1004542 A1 EP 1004542A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- hydraulic
- working machine
- machine according
- hydraulic pump
- 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
Images
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
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
- F04B23/023—Pumping installations or systems having reservoirs the pump being immersed in the reservoir only the pump-part being immersed, the driving-part being outside the reservoir
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
Definitions
- the invention relates to a work machine, in particular industrial truck, with a hydraulic system that has at least one tank for hydraulic fluid and at least has a hydraulic pump.
- Working machines are often equipped with a hydraulic system, via which, depending on the construction of the machine, drives different Functions of the working machine is carried out. This is the case with industrial trucks usually about lifting and tilting a load, about steering the Industrial truck and possibly additional functions for handling Loads.
- the hydraulic system usually has a tank, from which a Pump hydraulic fluid is sucked in.
- the pump is switched on Priority valve, which preferably has a hydraulic steering device Hydraulic fluid supplied.
- hydraulic fluid becomes over arbitrary controllable directional valves available to other hydraulic consumers posed. These are usually hydraulic cylinders with which to Lifting, tilting or handling a load required forces are generated.
- the steering device and the other hydraulic consumers are still connected to the tank via return lines, with in the return lines if necessary, a lowering brake to reduce the flow rate Hydraulic fluid, or a bias valve to maintain a predetermined Pressure levels can be arranged in the corresponding return line.
- hydraulic components mentioned are in the state of the art technology usually separated from each other on a frame of Work machine attached and with each other via hose or pipes connected. It is also known to different hydraulic components Summarize assemblies and together on the framework of the Attach work machine. In any case, known hydraulic systems however, a number of parting lines and junctions with seals various types are sealed against the leakage of hydraulic fluid.
- the present invention has for its object a generic To provide work machine at which the risk of leakage from Hydraulic fluid is reduced with simple means.
- the hydraulic pump is arranged inside the tank. If there is a leak in the housing Hydraulic pump or its hydraulic connections flows the escaping Hydraulic oil directly into the tank. This will contaminate the Machine and the environment safely prevented. Sealing this up leaks are only in the case of gross damage to the sealing elements required if the escaping hydraulic fluid causes a loss of performance hydraulic system leads. Minor leaks can occur regularly maintenance work that is taking place must be remedied since it Work machine pose no danger to operational safety and the environment. On Another advantage of the arrangement of the pump in the tank is that in the event of leaks Places in a suction area of the pump, for example on an intake pipe or on a filter, entry of air into the hydraulic pump and thus one Damage due to cavitation is avoided.
- an electric drive motor Hydraulic pump is arranged inside the tank. It is not a mechanical one Rotary feedthrough through a wall of the tank required. That in the tank hydraulic fluid is also used as a coolant for the electrical Drive motor.
- the arrangement of the electric drive motor inside the tank lends itself particularly well when a maintenance-free three-phase motor is used.
- a further improvement with regard to the leakage of hydraulic fluid results if a priority valve is located inside the tank.
- the priority valve provides sure that a steering device of the working machine is always sufficient Hydraulic fluid is supplied. Leaks in the area of the priority valve, for example at the hydraulic connection points, lead with this arrangement not to pollute the environment with hydraulic fluid. Instead it will the leaking hydraulic fluid is caught in the tank.
- Hydraulic pump and priority valve can be pre-assembled Unit to be installed in the tank.
- At least one directional control valve is located inside the tank is arranged.
- the supply of hydraulic fluid is blocked by means of the directional control valves different hydraulic consumers depending on one of one Operator generated signal controlled. Leakages of these are usually proportional controllable directional valves, which can also be designed as slide valves, are caught by the tank.
- slide valves the devices in the State of the art required complex tank return due to the design resulting leakage oil can be dispensed with. It is even possible on the usual used seals against contamination of the slide valves, because due to the arrangement in the tank, they are not exposed to external influences.
- the directional control valve is electrically controllable.
- the directional control valves can thus be spatially be arranged independently of the respectively assigned control lever.
- directional control valves are provided, one Form directional valve block.
- the directional valve block can be pre-assembled in the tank become.
- the priority valve is a component of the directional valve block with particular advantage. There is therefore no need for hydraulic lines to connect the priority valve connect with the directional valve block.
- the steering valve can also be designed as part of the directional valve block his.
- Additional advantages result if additional hydraulic components, for example one or more preload valves and / or a lowering brake valve, are arranged inside the tank.
- Preload valve and lowering brake valve are in arranged the return lines of hydraulic consumers. This too Components can be arranged according to the invention within the tank.
- the figure shows a tank 1 of a hydraulic system of a work machine.
- the Tank 1 is sealed with a tank hood 2.
- a number of components of the hydraulic system are arranged.
- An electric drive motor 3 designed as a three-phase motor is located below the fill line 4 of the tank 1 and is thus from the surrounding Hydraulic fluid cooled.
- a hydraulic pump is flanged to the drive motor 3 5, which is driven by the drive motor 3.
- the hydraulic pump 5 sucks a suction filter 6, which is arranged in a suction pipe 7, hydraulic fluid from the Tank 1 on.
- the hydraulic pump 5 is connected to the hydraulic pump 5 in the area of an outlet opening a directional valve block 8 flanged, which in this embodiment Priority valve 8a, a steering valve 8b and two directional control valves 8c, 8d. Of the The steering valve 8b and the directional control valves 8c, 8d run over a flange plate 10 hydraulic pressure lines 9 to the respective hydraulic consumers.
- the tank hood 2 there is also a bushing for electrical lines arranged.
- a control and supply line 11 for the electrical Drive motor 3 and signal lines 12 to the steering valve 8b and Directional control valves 8c, 8d are provided.
- the signal lines are with the corresponding ones Control levers or a steering sensor connected to which electrical Control signals are generated.
- FIG. 1 Also shown are two return lines 13 through which hydraulic fluid from flows back to the various hydraulic consumers in tank 1.
- the Return lines 13 are via a flange plate 14 through the tank hood 2 in led the tank 1.
- a lowering brake valve 15 In the right return line in the drawing, which with a lifting cylinder, not shown, of the working machine is connected there is a lowering brake valve 15.
- the lowering brake valve 15 prevents a too fast Outflow of hydraulic oil into the tank 1 and is therefore suitable, for example the Braking lowering movement of a load suspension device.
- left return line is a bias valve 16, with a certain predetermined pressure is maintained in the return line.
- the directional valve block 8 the Lowering brake valve 15 and the preload valve 16 are arranged inside the tank 1. Leaks at these hydraulic components or at their connection points therefore do not lead to contamination of the working machine and its Environment with hydraulic fluid. Instead, the unintentionally emerging Hydraulic fluid caught in the tank.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims (12)
- Arbeitsmaschine, insbesondere Flurförderzeug, mit einer hydraulischen Anlage, die mindestens einen Tank (1) für Hydraulikfluid und mindestens eine Hydraulikpumpe (5) aufweist, dadurch gekennzeichnet, daß die Hydraulikpumpe (5) innerhalb des Tanks (1) angeordnet ist.
- Arbeitsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß ein elektrischer Antriebsmotor (3) der Hydraulikpumpe (5) innerhalb des Tanks (1) angeordnet ist.
- Arbeitsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß ein elektrischer Antriebsmotor (3) der Hydraulikpumpe (5) außerhalb des Tanks (1) angeordnet ist, wobei eine den elektrischen Antriebsmotor (3) mit der Hydraulikpumpe (5) verbindende Welle gegenüber dem Tank (1) mit einem Wellendichtring abgedichtet ist.
- Arbeitsmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß ein Prioritätsventil (8a) innerhalb des Tanks (1) angeordnet ist.
- Arbeitsmaschine nach Anspruch 4, dadurch gekennzeichnet, daß das Prioritätsventil (8a) mittels einer Flanschverbindung an der Hydraulikpumpe (5) befestigt ist.
- Arbeitsmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß mindestens ein Wegeventil (8c, 8d) innerhalb des Tanks (1) angeordnet ist.
- Arbeitsmaschine nach Anspruch 6, dadurch gekennzeichnet, daß das Wegeventil (8c, 8d) elektrisch ansteuerbar ausgeführt ist.
- Arbeitsmaschine nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß mehrere Wegeventile (8c, 8d) vorgesehen sind, die einen Wegeventilblock (8) bilden.
- Arbeitsmaschine nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß das Prioritätsventil (8a) ein Bestandteil des Wegeventilblocks (8) ist.
- Arbeitsmaschine nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß ein Lenkventil (8b) innerhalb des Tanks (1) angeordnet ist.
- Arbeitsmaschine nach Anspruch 10, dadurch gekennzeichnet, daß das Lenkventil (8b) ein Bestandteil des Wegeventilblocks (8) ist.
- Arbeitsmaschine nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß weitere hydraulische Bauelemente, beispielsweise ein oder mehrere Vorspannventile (16) und/oder ein Senkbremsventil (15), innerhalb des Tanks (1) angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19854417 | 1998-11-25 | ||
DE19854417A DE19854417A1 (de) | 1998-11-25 | 1998-11-25 | Arbeitsmaschine, insbesondere Flurförderzeug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1004542A1 true EP1004542A1 (de) | 2000-05-31 |
EP1004542B1 EP1004542B1 (de) | 2006-01-25 |
Family
ID=7889004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99123341A Expired - Lifetime EP1004542B1 (de) | 1998-11-25 | 1999-11-23 | Hydraulische Anlage insbesondere für ein Flurförderzeug |
Country Status (3)
Country | Link |
---|---|
US (1) | US6290474B1 (de) |
EP (1) | EP1004542B1 (de) |
DE (2) | DE19854417A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1612418A1 (de) * | 2004-07-03 | 2006-01-04 | Jungheinrich Aktiengesellschaft | Hydraulikaggregat für Flurförderzeuge |
WO2009030793A1 (es) * | 2007-08-27 | 2009-03-12 | Romeral Cabeza, Angel | Mecanismo multiplicador de presion |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPP786598A0 (en) * | 1998-12-23 | 1999-01-21 | Jaden Charters Pty Ltd | Improved skid-steer vehicle |
DE20205936U1 (de) * | 2002-04-16 | 2002-08-22 | TRW Fahrwerksysteme GmbH & Co. KG, 40547 Düsseldorf | Hydraulikpumpe, insbesondere für ein Servolenksystem |
FR2843601B1 (fr) * | 2002-08-13 | 2005-03-04 | Rouby Ind | Dispositif de manoeuvre de mecanismes associes aux ecluses et de regulation de flux de rivieres |
US7185449B2 (en) * | 2004-03-16 | 2007-03-06 | Kime James A | System for controlling the hydraulic actuated components of a truck |
US8806862B2 (en) * | 2007-12-20 | 2014-08-19 | Parker-Hannifin Corporation | Smart flow sharing system |
TWI407019B (zh) * | 2010-07-30 | 2013-09-01 | Wen Kwo Tien | 具有自動封閉功能的油壓管路模組 |
US20150247493A1 (en) * | 2014-02-28 | 2015-09-03 | Schlumberger Technology Corporation | High pressure transfer motor-pump |
US11339772B2 (en) * | 2019-12-13 | 2022-05-24 | Kti Hydraulics Inc. | Hydraulic power units with submerged motors |
WO2021118607A1 (en) * | 2019-12-14 | 2021-06-17 | Kti Hydraulics Inc. | Hydraulic power units with submerged motors |
EP4239195A1 (de) * | 2022-03-01 | 2023-09-06 | Mathieu | Wasserkraftwerk |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1586186A (de) * | 1968-09-06 | 1970-02-13 | ||
US4904162A (en) * | 1986-01-17 | 1990-02-27 | Mitsubishi Denki Kabushiki Kaisha | Fuel supplying pump |
DE19612582A1 (de) * | 1996-03-29 | 1997-10-02 | Miag Fahrzeugbau Gmbh | Antriebseinheit für ein Fahrzeug |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754394A (en) * | 1971-12-02 | 1973-08-28 | Hyster Co | Hydraulic control system for electric lift truck |
DE2337276A1 (de) * | 1973-07-23 | 1975-02-06 | Karl Hehl | Maschinenfuss einer spritzgiessmaschine |
US3918683A (en) * | 1974-01-09 | 1975-11-11 | Daniel J Millar | Electro-hydraulic jack |
US4005636A (en) * | 1975-02-13 | 1977-02-01 | J. I. Case Company | Hydraulic system for a working machine |
US3988089A (en) * | 1975-09-10 | 1976-10-26 | The Goodyear Tire & Rubber Company | Apparatus for manufacturing curved bodies of fiber reinforced plastic |
DE2653102B1 (de) * | 1976-11-23 | 1978-09-07 | Hatlapa Uetersener Maschf | Hydraulische Winde |
US4551973A (en) * | 1982-10-28 | 1985-11-12 | Syntex (U.S.A.) Inc. | Hydraulic power source and valve therefor |
DE3310702A1 (de) * | 1983-03-24 | 1984-09-27 | Allweiler Ag, 7760 Radolfzell | Verfahren und vorrichtung zum betreiben eines hydraulischen aufzugs |
US4773494A (en) * | 1985-10-07 | 1988-09-27 | Gene Anderson | Hydraulically drive wheelchair |
US4844197A (en) * | 1986-07-14 | 1989-07-04 | Western Atlas International, Inc. | Hydraulic release system for use in a borehole apparatus |
US5144801A (en) * | 1989-04-28 | 1992-09-08 | Parker Hannifin Corporation | Electro-hydraulic actuator system |
US5497621A (en) * | 1994-11-10 | 1996-03-12 | Fenner Fluid Power, A Division Of Fenner, Inc. | Plastic reservoir |
-
1998
- 1998-11-25 DE DE19854417A patent/DE19854417A1/de not_active Withdrawn
-
1999
- 1999-11-23 EP EP99123341A patent/EP1004542B1/de not_active Expired - Lifetime
- 1999-11-23 DE DE59913077T patent/DE59913077D1/de not_active Expired - Fee Related
- 1999-11-24 US US09/449,304 patent/US6290474B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1586186A (de) * | 1968-09-06 | 1970-02-13 | ||
US4904162A (en) * | 1986-01-17 | 1990-02-27 | Mitsubishi Denki Kabushiki Kaisha | Fuel supplying pump |
DE19612582A1 (de) * | 1996-03-29 | 1997-10-02 | Miag Fahrzeugbau Gmbh | Antriebseinheit für ein Fahrzeug |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1612418A1 (de) * | 2004-07-03 | 2006-01-04 | Jungheinrich Aktiengesellschaft | Hydraulikaggregat für Flurförderzeuge |
CN100343536C (zh) * | 2004-07-03 | 2007-10-17 | 容海因里希股份公司 | 工业卡车的液压装置 |
WO2009030793A1 (es) * | 2007-08-27 | 2009-03-12 | Romeral Cabeza, Angel | Mecanismo multiplicador de presion |
Also Published As
Publication number | Publication date |
---|---|
DE59913077D1 (de) | 2006-04-13 |
EP1004542B1 (de) | 2006-01-25 |
US6290474B1 (en) | 2001-09-18 |
DE19854417A1 (de) | 2000-05-31 |
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