EP3530817B1 - Machine de travail avec un dispositif de modification de la distribution de la pression au sol de la machine de travail - Google Patents

Machine de travail avec un dispositif de modification de la distribution de la pression au sol de la machine de travail Download PDF

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Publication number
EP3530817B1
EP3530817B1 EP19150164.2A EP19150164A EP3530817B1 EP 3530817 B1 EP3530817 B1 EP 3530817B1 EP 19150164 A EP19150164 A EP 19150164A EP 3530817 B1 EP3530817 B1 EP 3530817B1
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EP
European Patent Office
Prior art keywords
work machine
support
pressure distribution
ground pressure
support cylinder
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.)
Active
Application number
EP19150164.2A
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German (de)
English (en)
Other versions
EP3530817A2 (fr
EP3530817A3 (fr
Inventor
Dennis Zimmermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Nenzing GmbH
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Liebherr Werk Nenzing GmbH
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Application filed by Liebherr Werk Nenzing GmbH filed Critical Liebherr Werk Nenzing GmbH
Publication of EP3530817A2 publication Critical patent/EP3530817A2/fr
Publication of EP3530817A3 publication Critical patent/EP3530817A3/fr
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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/02Travelling-gear, e.g. associated with slewing gears
    • E02F9/028Travelling-gear, e.g. associated with slewing gears with arrangements for levelling the machine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/72Counterweights or supports for balancing lifting couples
    • B66C23/78Supports, e.g. outriggers, for mobile cranes
    • B66C23/80Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88Safety gear
    • B66C23/90Devices for indicating or limiting lifting moment
    • B66C23/905Devices for indicating or limiting lifting moment electrical
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2257Vehicle levelling or suspension systems

Definitions

  • the invention relates to a work machine with a device for changing the ground pressure distribution with at least one support plate for supporting the work machine against its ground and at least one support cylinder for adjusting the support plate relative to the rest of the structure of the work machine, comprising at least one pressure measuring device for measuring the pressure in the support cylinder, wherein the device is set up to change the soil pressure distribution by regulating / controlling the pressure in the support cylinder.
  • ground pressure distribution When using work machines such as excavators or cranes, for example, it is known to keep the ground pressure below the work machine as low or even as possible.
  • additional devices such as support plates on the work machine, which can be provided, for example, next to the work machine or between caterpillar carriers of the work machine.
  • the support plates By means of the support plates, the support surface of the work machine can be enlarged and thus the weight of the work machine transmitted via the support surface can be introduced more evenly into the subsurface of the work machine.
  • This is synonymous with the ground pressure distribution to make it more even.
  • the ground pressure distribution obviously results from the forces introduced into the ground over all corresponding contact surfaces of the working machine.
  • the contact surfaces can be the support plate, the wheel chassis, the crawler chassis and / or other components of the work machine that are in contact with the ground.
  • the document JPH09110383 discloses a work machine with a crawler track and an additional support cylinder with a support plate for changing the ground pressure distribution, the corresponding support cylinder being fully extended or retracted as required.
  • the work machine according to the invention can comprise its own regulating / control device which is set up to evaluate the pressure measuring device.
  • a hydraulic supply to the support cylinder for changing the pressure in the support cylinder can also be controlled by means of the regulating / control device.
  • the regulating / control device can also be part of a regulation / control device already provided on the work machine, for example an on-board computer.
  • a variable distribution of the ground pressure can be set, both between the base of the machine, which can be defined, for example, by the caterpillars or wheels of the work machine, and the support plate or the support plates of the work machine. Not only can the distribution of the force or pressure between the caterpillars or wheels on the one hand and the support plate on the other hand be optimized, but the ground pressure distribution within, for example, only the caterpillars or caterpillar surfaces can be changed by shifting the resulting center of gravity of the work machine to a favorable position will.
  • the at least one support cylinder can be a hydraulic cylinder-piston device known per se.
  • the device is set up to change the soil pressure distribution in order to minimize the soil pressure.
  • tables and / or functions can be stored in the regulating / control device, on the basis of which the soil pressure distribution can be derived from the pressure conditions determined in the support cylinder and / or can be calculated taking into account further parameters.
  • the device can thus also comprise further measuring devices which are taken into account when changing the soil pressure distribution. This can be, for example, a position measuring device by means of which the position or the state of the support cylinder can be measured. It is also conceivable that detection devices are provided for detecting the set-up status of the work machine.
  • the set-up state of the work machine can optionally be variable and thereby have different effects on the ground pressure distribution of the work machine. If this is the case, the set-up state of the working machine can be taken into account with a corresponding detection device when the ground pressure distribution changes.
  • the at least one support plate can be adjusted relative to the rest of the structure of the work machine by means of at least two support cylinders.
  • the different support cylinders can, for example, be moved or extended and retracted to different degrees, so that a corresponding relative movement between the support plate and the rest of the structure of the work machine is also possible.
  • the ground pressure distribution can be set finer or more differentiated than would be possible by means of a single support cylinder.
  • At least two support plates are provided.
  • more than two support plates can also be provided.
  • the support plates can be arranged symmetrically, for example in pairs, on the work machine.
  • the at least two support plates are arranged on the same and / or on opposite and / or adjacent sides of the work machine.
  • these can thus be arranged, for example, on a front side and a rear side of the work machine and / or also be moved or pivoted independently of one another relative to the rest of the structure of the work machine.
  • the work machine is set up to change the soil pressure distribution automatically and / or manually. It is thus conceivable that the ground pressure distribution is changed or not changed as a function of a parameter of the working machine. It is conceivable, for example, that a working state of the working machine is automatically or manually differentiated from a moving state of the working machine and the ground pressure distribution is optionally automatically changed or adapted in a working state alone, with the working machine being stationary and set up to carry out work in the working state. It is also conceivable that an automatic ground pressure distribution can be carried out in response to a signal entered manually or by an operator.
  • the work machine comprises at least one output device for outputting at least one signal related to the soil pressure distribution.
  • the signal can be, for example, a warning signal that indicates that the ground pressure distribution falls below or exceeds a certain value.
  • an input device is provided, by means of which the changing of the soil pressure distribution can be controlled manually.
  • the control of the device can be limited to the fact that the change of the ground pressure distribution is released by an operator, which is otherwise carried out automatically.
  • the input device can be used to transmit control signals to a hydraulic device of the device or the working machine, which changes the filling or the pressure in the support cylinder on the basis of the received signals.
  • the pressure measuring device is provided in the area of the support cylinder.
  • the pressure measuring device is provided at a distance from the support cylinder and, for example, in the area of a hydraulic supply device.
  • This hydraulic supply device can be at a distance from the support cylinder and can be located, for example, in an engine compartment or equipment compartment of the work machine, where it can be better protected against external influences.
  • the present assistance system can set the pressure here so that the ground pressure under the support plate is only as great as necessary to protect the machine from tipping over or tipping over. At the same time, the pressure can be kept at least as high as the pressure under the bead.
  • the device generates the lowest possible ground pressure that is physically possible.
  • the lower ground pressure leads to simpler and / or more cost-effective possible uses of corresponding work machines, since the preparation of the subsurface by using additional machines and applying the time required for this is omitted or at least optimized.
  • Figure 1 shows a schematic view of a work machine known from the prior art. This is operated without support or without activated support plate and with the maximum possible load.
  • the track width is here as well in the following Figures 4 , 70m indicated.
  • the width of the caterpillars is given as 0.90m.
  • the length of the caterpillars is given as 4.95m.
  • the center of gravity 10 is indicated by the corresponding symbol. The loads result from the figures given in the respective figures.
  • Figure 2 shows a schematic representation of an inventive work machine with activated support, maximum possible load and activated device for changing the ground pressure distribution.
  • the maximum occurring ground pressure was around 65kN / m 2 compared to that in Figure 1 shown situation lowered and with a support force of 61.8kN on the support cylinder.
  • Figure 3 shows a schematic representation of an inventive work machine with support, maximum possible load and maximum cylinder pressure of approx. 890 kN / m 2 .
  • Figure 4 shows a schematic representation of an inventive work machine with support, maximum possible load and activated device for changing the soil pressure distribution.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Soil Working Implements (AREA)
  • Operation Control Of Excavators (AREA)
  • Agricultural Machines (AREA)

Claims (8)

  1. Engin de travail avec au moins une plaque de soutien pour soutenir l'engin de travail contre son support et au moins un cylindre de soutien pour ajuster la plaque de soutien par rapport à la structure restante de l'engin de travail ainsi qu'un dispositif de modification de la distribution de pression au sol de l'engin de travail, dans lequel le dispositif comprend au moins un système de mesure de pression pour mesurer la pression dans le cylindre de soutien et dans lequel le dispositif est mis au point pour modifier la distribution de pression au sol par la régulation/la commande de la pression dans le cylindre de soutien, dans lequel la pression est réglée dans le cylindre de soutien de telle manière que la pression au sol sous la plaque de soutien est égale à la pression nécessaire pour protéger l'engin de travail contre un basculement, correspond dans le même temps toutefois au moins à la pression au sol sous une chenille ou un châssis de l'engin de travail.
  2. Engin de travail selon la revendication 1, caractérisé en ce que l'au moins une plaque de soutien peut être ajustée par l'intermédiaire d'au moins deux cylindres de soutien par rapport à la structure restante de l'engin de travail.
  3. Engin de travail selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins deux plaques de soutien sont prévues.
  4. Engin de travail selon la revendication 3, caractérisé en ce que les au moins deux plaques de soutien sont disposées sur les mêmes côtés et/ou sur des côtés se faisant face les uns les autres de l'engin de travail.
  5. Engin de travail selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif est mis au point pour modifier automatiquement et/ou manuellement la distribution de pression au sol.
  6. Engin de travail selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif comprend au moins un système d'envoi pour envoyer au moins un signal se rapportant à la distribution de pression au sol.
  7. Engin de travail selon l'une quelconque des revendications précédentes, caractérisé en ce qu'est prévu un système de saisie, au moyen duquel la modification de la distribution de pression au sol peut être commandée manuellement.
  8. Engin de travail selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de mesure de pression est prévu dans la zone du cylindre de soutien.
EP19150164.2A 2018-02-22 2019-01-03 Machine de travail avec un dispositif de modification de la distribution de la pression au sol de la machine de travail Active EP3530817B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018104041.5A DE102018104041A1 (de) 2018-02-22 2018-02-22 Vorrichtung zur Veränderung der Bodendruckverteilung einer Arbeitsmaschine und entsprechende Arbeitsmaschine

Publications (3)

Publication Number Publication Date
EP3530817A2 EP3530817A2 (fr) 2019-08-28
EP3530817A3 EP3530817A3 (fr) 2020-01-08
EP3530817B1 true EP3530817B1 (fr) 2021-12-22

Family

ID=64949182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19150164.2A Active EP3530817B1 (fr) 2018-02-22 2019-01-03 Machine de travail avec un dispositif de modification de la distribution de la pression au sol de la machine de travail

Country Status (2)

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EP (1) EP3530817B1 (fr)
DE (1) DE102018104041A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200009161A1 (it) * 2022-05-05 2023-11-05 Casagrande Spa Macchina operatrice e procedimento per farla lavorare in sicurezza

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07137614A (ja) 1993-09-22 1995-05-30 Komatsu Mec Corp アウトリガを有する作業車の車体水平設置装置
JPH09110383A (ja) 1995-10-16 1997-04-28 Sumitomo Constr Mach Co Ltd アウトリガ装置を備えたクロ−ラクレ−ン
DE10320382A1 (de) 2003-05-06 2004-12-23 Universität Stuttgart vertreten durch das Institut für Geotechnik Mobile Arbeitsmaschine mit Stützauslegern
DE202006017724U1 (de) 2006-11-21 2008-04-03 Liebherr-Werk Ehingen Gmbh Mobilkran
JP2008280097A (ja) 2007-05-08 2008-11-20 Furukawa Unic Corp アウトリガ張出し状態調整装置
CN103663210A (zh) 2013-12-13 2014-03-26 中联重科股份有限公司 履带式机械安全控制方法、设备、系统、以及工程机械
DE102013007869A1 (de) 2013-05-08 2014-11-13 Schwing Gmbh Vorrichtung zum Abstützen einer mobilen Vorrichtung am Boden
US9381844B2 (en) 2012-02-06 2016-07-05 Hunan Sany Intelligent Control Equipment Co., Ltd Pump truck stability control system, control method, and pump truck

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20116231U1 (de) * 2001-10-02 2002-02-21 Klaas Theodor Gmbh & Co Selbstaufbauendes Arbeitsgerät
DE102015003177A1 (de) * 2015-03-12 2016-09-15 Liebherr-Werk Nenzing Gmbh Verfahren zum Betrieb einer mobilen Arbeitsmaschine mit Bodendruckbegrenzung
DE202016004687U1 (de) * 2016-07-29 2017-11-02 Liebherr-Werk Nenzing Gmbh Mobile Arbeitsmaschine
DE102017003479A1 (de) * 2017-04-10 2018-10-11 Liebherr-Werk Nenzing Gmbh Vorrichtung zur Überwachung und/oder Veränderung der Bodendruckverteilung einer Baumaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07137614A (ja) 1993-09-22 1995-05-30 Komatsu Mec Corp アウトリガを有する作業車の車体水平設置装置
JPH09110383A (ja) 1995-10-16 1997-04-28 Sumitomo Constr Mach Co Ltd アウトリガ装置を備えたクロ−ラクレ−ン
DE10320382A1 (de) 2003-05-06 2004-12-23 Universität Stuttgart vertreten durch das Institut für Geotechnik Mobile Arbeitsmaschine mit Stützauslegern
DE202006017724U1 (de) 2006-11-21 2008-04-03 Liebherr-Werk Ehingen Gmbh Mobilkran
JP2008280097A (ja) 2007-05-08 2008-11-20 Furukawa Unic Corp アウトリガ張出し状態調整装置
US9381844B2 (en) 2012-02-06 2016-07-05 Hunan Sany Intelligent Control Equipment Co., Ltd Pump truck stability control system, control method, and pump truck
DE102013007869A1 (de) 2013-05-08 2014-11-13 Schwing Gmbh Vorrichtung zum Abstützen einer mobilen Vorrichtung am Boden
CN103663210A (zh) 2013-12-13 2014-03-26 中联重科股份有限公司 履带式机械安全控制方法、设备、系统、以及工程机械

Also Published As

Publication number Publication date
DE102018104041A1 (de) 2019-08-22
EP3530817A2 (fr) 2019-08-28
EP3530817A3 (fr) 2020-01-08

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