WO2011128459A1 - Appareil de levage mobile à entraînement électrohydraulique - Google Patents

Appareil de levage mobile à entraînement électrohydraulique Download PDF

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Publication number
WO2011128459A1
WO2011128459A1 PCT/EP2011/056170 EP2011056170W WO2011128459A1 WO 2011128459 A1 WO2011128459 A1 WO 2011128459A1 EP 2011056170 W EP2011056170 W EP 2011056170W WO 2011128459 A1 WO2011128459 A1 WO 2011128459A1
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WO
WIPO (PCT)
Prior art keywords
hydraulic cylinder
lifting
lifting device
hydraulic
load
Prior art date
Application number
PCT/EP2011/056170
Other languages
German (de)
English (en)
Inventor
Andreas Hauck
Original Assignee
Georg Kramp Gmbh & Co. Kg
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 Georg Kramp Gmbh & Co. Kg filed Critical Georg Kramp Gmbh & Co. Kg
Publication of WO2011128459A1 publication Critical patent/WO2011128459A1/fr

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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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
    • B62B3/0618—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground using fluid lifting mechanisms

Definitions

  • this load can be raised by operating the manual hydraulic pump.
  • several such lifting devices must be used if the load is to be raised evenly at all points or the lifting capacity of a lifting device is insufficient.
  • the invention has for its object to improve such a lifting device in terms of manageability, applicability and safety even further.
  • This object is achieved in that the hydraulic pump is driven by an electric motor. This makes it possible to lift the load regardless of the physical strength of the operator. At the same time, it can be ensured that, by means of a suitable torque limitation of the electric motor or via hydraulic pressure limiting valves, no loads that are too heavy are lifted by a lifting device. Thus, in a simple manner, the usability, but also the reliability of the mobile lifting device has been significantly improved.
  • means are provided for detecting a position of the hydraulic cylinder.
  • These means for detecting the position of the hydraulic cylinder may be formed as a rotation angle sensor or as a magnetic system for detecting the revolutions, which detect the rotation angle or the number of revolutions of a positive displacement hydraulic pump or the electric motor.
  • the position of the hydraulic cylinder is detected directly, for example via inductive or magneto-inductive distance or displacement sensors or a cable pull sensor.
  • the hydraulic cylinder is designed as a double-acting hydraulic cylinder. This makes it possible to actively control the lifting and lowering of the load for each of the lifting devices used. As a result, it is ensured even when lowering the load that the load does not tip, but is lowered evenly. Furthermore, a better load distribution is achieved within the various lifting devices.
  • the electric motor is supplied with electrical energy by a rechargeable accumulator, preferably a lithium-ion accumulator. This eliminates the need for a power supply to the mobile lifting equipment and the lifting equipment can be operated anywhere, regardless of a power grid.
  • a control device which controls the electric motor in response to the signals of a remote control and / or the output signals of the means for detecting a position of the hydraulic cylinder.
  • a frequently occurring situation in practice is characterized in that the force application points of the lever ashtrays on a machine to be lifted are of different heights.
  • the lever ashes are initially driven with a very small force from below to the load to be lifted.
  • the individual positions of the hydraulic cylinders or the associated lifting lugs are stored as the zero point of the lifting operation in the control units of the lifting devices. This process of starting is done with such a low hydraulic pressure that the load is not raised thereby.
  • This process of starting an individual zero point of the lever ashes of all involved lifting equipment is referred to as synchronizing before the start of the lifting process.
  • a further synchronization is made so that all lifters execute the same stroke. This synchronization takes place during the actual stroke and also when reaching the end position of the hydraulic cylinder when the load has been fully raised.
  • the lifting devices can also communicate with each other wirelessly or by wire. This communication can be done during synchronization or during the lifting process. So when lifting the situation may occur that a single lifter is overloaded and as a result, the pressure in the hydraulic cylinder is reduced. This has the consequence that at least one adjacent lifting device is additionally loaded. If now also this neighboring lifter should be overloaded, it could come to an unwanted chain reaction. This can be prevented by a communication of the lifting devices with each other, for example, by all lifting equipment even settle the load to be lifted again.
  • the object underlying the invention is also achieved by a method for lifting heavy loads by means of at least two mobile lifting devices, wherein the mobile lifting devices are each equipped with a hydraulic cylinder, a hydraulic pump and means for detecting a position of the hydraulic cylinder.
  • the hydraulic pump or the electric motor which drives the hydraulic pump in response to the signals of a remote control and / or the output signals of the means for detecting a position of the hydraulic cylinder is driven.
  • a load-independent and synchronous lifting of a load can be achieved according to the invention in that the number of revolutions of the electric motor or the number of pump strokes is the same for all lifting devices. This can be achieved by communication between the lifting devices with each other and / or with the remote control. For example, a further pump stroke can not be released until all lifting devices have communicated the execution of a pump stroke to the other lifting devices and / or the remote control. This makes it possible to uniformly and safely lift a load with unequal weight distribution.
  • the lifting operation can be controlled away and / or force controlled.
  • a force control it is possible to distribute the load on the various lifting devices so that none of the lifting devices is overloaded.
  • FIG. 1 shows an isometric illustration of an exemplary embodiment of a lifting device according to the invention with a wired remote control
  • FIG. 2 shows a longitudinal section through the exemplary embodiment according to FIG. 1,
  • FIGS. 3 to 5 show different configurations of a plurality of lifting devices according to the invention used to lift a load
  • Figure 6 is a hydraulic diagram of a lifting device according to the invention.
  • the lifter 1 shows a first embodiment of a lifting device 1 according to the invention with a wired remote control 3 is shown isometrically.
  • the lifter 1 comprises a frame 5, a hydraulic cylinder 7 and a lever ashtray 9 fastened to the hydraulic cylinder 7.
  • the lever tab 9 can be fixed in different positions on the hydraulic cylinder 7, depending on the height at which the load application points on the load to be lifted (not shown) ) available.
  • a hydraulic unit, a control unit and a power supply in the form of an accumulator 13 are arranged.
  • the hydraulic power unit comprising two electrically driven positive displacement pumps, a reservoir and various switching valves, and the control unit are covered in Figure 1 by a cover 15.
  • the accumulator 13 can be designed as a commercially available lithium-ion accumulator with an operating voltage of 14.4 V and a storage capacity of, for example, 2.2 ampere hours, as are known from cordless screwdrivers or other hand tools.
  • a charging station for the accumulator 13 is not shown in FIG.
  • the work with the lifting device 1 according to the invention is very simple.
  • the lever tab 9 In order to lift a load, the lever tab 9 is positioned below a suitable point of application of force against the load to be lifted. Subsequently, the hydraulic cylinder 7 is slightly extended via the remote control 3, so that the lever tab 9 comes from below in contact with the intended force application point on the load to be lifted. Subsequently, the actual lifting operation begins by the hydraulic cylinder 7 is extended via the remote control 3 so far until the load was raised by the desired stroke.
  • FIG. 2 shows the lifting device 1 according to FIG. 1 in longitudinal section.
  • the same components are provided with the same reference numerals, and the same applies with regard to FIG. 1.
  • the hydraulic cylinder 7 is designed as a double-acting hydraulic cylinder.
  • the first working space 41 which is increased in volume for lifting the load, is not visible in FIG. 2, since it is formed between the upper end of a fixedly installed piston rod 17 and a top plate 19. In the lowest position of the hydraulic cylinder shown in Figure 2, the top plate 19 sits on the upper end of the fixed piston rod 17, so that the volume of the first working chamber 41 is zero in this position.
  • a first delivery line via which the first working space 41c is supplied with hydraulic oil is provided with the reference number 21 in FIG.
  • a second working space 23 of the double-acting hydraulic cylinder 7 is supplied with hydraulic oil via a second delivery line 25.
  • the second working space 23 is limited in the radial direction on the outside by a cylinder tube 27 and internally by the piston rod 17. Since double-acting hydraulic cylinders 7 have long been part of the prior art, a detailed structural description of the hydraulic cylinder 7 is omitted here.
  • lever ashtray 11 is arranged only indirectly on the hydraulic cylinder 7 and a linear guide between the frame 5 and the movable part of the hydraulic cylinder 7 is provided, so that the hydraulic cylinder 7 no lateral forces resulting from the load to be lifted , must record.
  • a reservoir 29 for the hydraulic fluid and various valves are arranged on the left of the hydraulic cylinder 7. Furthermore, an electric motor 31, which is preferably designed as an electronically or mechanically commutated DC motor, a transmission 33 and a hydraulic pump 35 are shown.
  • the various main components, namely the hydraulic cylinder 7, the reservoir 29, and the hydraulic pumps 35 are connected to each other via a so-called valve plate 38, in which various valves are arranged.
  • control unit 37 is still visible in Figure 2, which evaluates the output signals of the means, not shown, for detecting the position of the hydraulic cylinder and the electric motor 31 drives.
  • the electric motor 31 may be formed, for example, as an electronically commutated DC motor.
  • a rotation angle sensor is present anyway in the electric motor 31, which according to the invention can also be used to detect the position of the hydraulic cylinder 7.
  • the hydraulic pump 35 is designed as a positive displacement pump, so that the volume of the first working space 41 and / or the second working space 23 of the hydraulic cylinder 7 can be determined depending on the number of revolutions which the electric motor 31 has performed.
  • the position of the hydraulic cylinder 7 or the lever ashtray 9 can then also be determined.
  • a roller 39 is provided, which make it possible to roll the lifting device 1 according to the invention to the place of use.
  • the electrohydraulic drive of the lifting devices 1 according to the invention and the position regulation of the lifting devices according to the invention make it possible to control a plurality of lifting devices with a remote control 3 and at the same time to ensure that the load to be lifted is lifted uniformly by the lifting devices 1 used.
  • FIG. 3 shows a first configuration in which two identical lifting devices 1 are controlled via a common remote control.
  • the data exchange between the remote control 3 and the lifting devices 1 is wired via lines.
  • a bus system such as a CAN bus to communicate information and communicate with the device. This bus system can work wired or wireless.
  • the load to be lifted can be doubled by inserting two structurally identical lifting devices 1. At the same time it is ensured that both lifting devices perform an equal stroke and thus the load to be lifted (not shown) is raised evenly.
  • FIGS. 4 and 5 show further configurations with three or four lifting devices 1 and one remote control 3, respectively.
  • the circuit diagram shown in Figure 6 showed a variant in the first working space 41 and the second working space 23 of the double-acting hydraulic cylinder 7 are each connected to its own hydraulic pump 35.1 and 35.2.
  • the suction sides of the hydraulic pumps 35.1 and 35.2 are connected via suction lines 43.1 and 43.2 to the storage containers Via conveying lines 21 and 25, the hydraulic pumps 35.1 and 35.2 convey hydraulic fluid into the working spaces 41 or 23.
  • Relief lines 45 branch off from the conveying lines 21, 25 with a controllable pressure limiting valve 47. When the pressure relief valve 47 is open, the hydraulic fluid delivered by the hydraulic pump 35 is returned to the reservoir 29.
  • check valves 49 are provided, whose function is apparent from the circuit diagram.
  • the check valve 49.6 can be unlocked by a connected to the feed line 21 auxiliary line 51, so that whenever there is a high pressure in the feed line 21, the check valve 49.6 is unlocked and consequently the second working space 23 is depressurized.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

L'invention concerne un appareil de levage (1) présentant un entraînement électrohydraulique et une régulation de position du cylindre hydraulique (7) permettant une utilisation simplifiée et moins dangereuse lors du levage de lourdes charges. De plus, il est possible de commander de manière synchronisée, via une télécommande, plusieurs appareils de levage (1), et de garantir, grâce à la régulation de position prévue pour chaque appareil de levage, que la charge est soulevée uniformément par tous les appareils de levage (1).
PCT/EP2011/056170 2010-04-16 2011-04-18 Appareil de levage mobile à entraînement électrohydraulique WO2011128459A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010015115.7 2010-04-16
DE201010015115 DE102010015115A1 (de) 2010-04-16 2010-04-16 Mobiles Hebegerät mit elektro-hydraulischem Antrieb

Publications (1)

Publication Number Publication Date
WO2011128459A1 true WO2011128459A1 (fr) 2011-10-20

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PCT/EP2011/056170 WO2011128459A1 (fr) 2010-04-16 2011-04-18 Appareil de levage mobile à entraînement électrohydraulique

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DE (1) DE102010015115A1 (fr)
WO (1) WO2011128459A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108146481A (zh) * 2018-01-24 2018-06-12 共同科技开发有限公司 一种方便上下料的水利工程用管道转运装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103318799A (zh) * 2012-03-23 2013-09-25 程曼华 矮型机械锁紧式液压千斤顶
NL2009949C2 (en) 2012-12-10 2014-06-11 Stertil Bv Lifting column for lifting a load, lifting system provided therewith and method for measuring a load.
NL2010365C2 (en) * 2013-02-26 2014-08-27 Stertil Bv Lifting column, lifting system and method for lifting a vehicle such as a rail-car.
CN104310266B (zh) * 2014-11-19 2017-07-14 杭州富阳泳富机械有限公司 一种新型液压爪式千斤顶
DE102015104349A1 (de) * 2015-03-24 2016-09-29 Asstec Assembly Technology Gmbh & Co. Kg Hebevorrichtung
DE202017107244U1 (de) 2017-11-29 2018-01-17 Udo Idler Hebeeinrichtung
DE202019101761U1 (de) 2019-03-28 2019-04-29 Udo Idler Rotationsschwerlastfahrwerk
WO2023018993A1 (fr) * 2021-08-12 2023-02-16 Enerpac Tool Group Corp. Ensemble vérin hydraulique

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE2012773A1 (de) * 1970-03-18 1971-10-07 Kramp, Georg Markus, 7000 Stuttgart Hebegerat
US5419533A (en) * 1993-07-20 1995-05-30 Bfj Company Lifting device
US20050045429A1 (en) * 2003-08-01 2005-03-03 Baker William J. Coordinated lift system with user selectable RF channels
DE102006004336A1 (de) * 2006-01-31 2007-08-09 Still Wagner Gmbh & Co Kg Niederhubwagen mit einer Hubeinrichtung

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DE4437080A1 (de) * 1994-10-17 1996-04-18 Hofmann Gmbh & Co Kg Maschinen Verfahren und Vorrichtung zur Positionsregelung der antreibbaren Hubwagen an einer Doppelsäulen-Hebebühne
DE19851377A1 (de) * 1998-11-07 2000-05-25 Pacoma Gmbh An einem Flurfördergerät anbaubare Hebevorrichtung
DE10122346A1 (de) * 2001-05-09 2002-11-14 Herbert Kuebler Hydraulik-Pumpeinheit für einen Heber zum Anheben einer Last sowie damit ausgestatteter Heber
DE10361807A1 (de) * 2003-12-30 2005-07-28 Herbert Kallenberger Hubsystem zum Anheben und Absenken und/oder Verschieben grosser Lasten
DE102004016183A1 (de) * 2004-03-30 2005-10-20 Reinhold Rachinger Lastaufnahmevorrichtung
DE202005005598U1 (de) * 2005-04-08 2005-06-09 Atrium Enterprises Gmbh Hubeinheit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2012773A1 (de) * 1970-03-18 1971-10-07 Kramp, Georg Markus, 7000 Stuttgart Hebegerat
US5419533A (en) * 1993-07-20 1995-05-30 Bfj Company Lifting device
US20050045429A1 (en) * 2003-08-01 2005-03-03 Baker William J. Coordinated lift system with user selectable RF channels
DE102006004336A1 (de) * 2006-01-31 2007-08-09 Still Wagner Gmbh & Co Kg Niederhubwagen mit einer Hubeinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108146481A (zh) * 2018-01-24 2018-06-12 共同科技开发有限公司 一种方便上下料的水利工程用管道转运装置

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Publication number Publication date
DE102010015115A1 (de) 2011-10-20

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