EP1897847B1 - Appareil de chargement - Google Patents

Appareil de chargement Download PDF

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Publication number
EP1897847B1
EP1897847B1 EP07115448A EP07115448A EP1897847B1 EP 1897847 B1 EP1897847 B1 EP 1897847B1 EP 07115448 A EP07115448 A EP 07115448A EP 07115448 A EP07115448 A EP 07115448A EP 1897847 B1 EP1897847 B1 EP 1897847B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
loader
hydraulic cylinder
supply line
sensor
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.)
Not-in-force
Application number
EP07115448A
Other languages
German (de)
English (en)
Other versions
EP1897847A2 (fr
EP1897847A3 (fr
Inventor
Marcus Bitter
Richard Tudor
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP1897847A2 publication Critical patent/EP1897847A2/fr
Publication of EP1897847A3 publication Critical patent/EP1897847A3/fr
Application granted granted Critical
Publication of EP1897847B1 publication Critical patent/EP1897847B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/24—Safety devices, e.g. for preventing overload
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • 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
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure

Definitions

  • the invention relates to a charger with a hydraulically actuatable boom, a sensor for monitoring the load condition on the charger and a hydraulic arrangement for actuating the boom and / or a tool mounted on the boom, wherein the hydraulic arrangement comprises at least one hydraulic cylinder with a rod-side and a piston-side supply line , at least one mechanically switchable control unit for controlling the at least one hydraulic cylinder, a hydraulic source, a hydraulic tank and an electronic control unit, wherein between the control unit and the hydraulic cylinder volume flow limiting means are provided, which in response to a sensor signal supplied by the sensor, a volume flow in at least one of the rod-side or piston-side supply lines of the hydraulic cylinder can be limited.
  • the WO 2004/007339 A1 discloses such a system.
  • a tilting moment acting on the vehicle is detected by sensors and fed to an electronic control.
  • several hydraulic cylinders for lifting, lowering and telescoping a telescopic boom and an electro-hydraulic control of the hydraulic cylinder are provided.
  • the system provides that, when approaching a predetermined threshold for the stalling torque, the hydraulic functions to operate the hydraulic cylinders are slowed down before the complete stoppage of the hydraulic cylinders occurs.
  • the load signal is further processed electronically and the operating possibilities are reduced by the operator or the actuation is prevented.
  • the more mature the technique is, for. B. by electronic control units, the easier is the intervention by the electronics.
  • valve spools of the control unit are controlled by hoists or levers
  • WO 2004/007339 A1 disclosed doctrine not applicable, since not controlled in such a simple manner in the mechanically performed by the operator functions can be intervened as a suitable electronics is missing.
  • the EP 0 580 007 A discloses a controller for pivoting one with a lifting device Horizontal axis erectable and adjustable in its effective length boom. Sensors are provided which on the one hand generate a force signal acting on the lifting device and, on the other hand, generate an angle signal taking into account the effective lever on the boom, wherein the signals are fed to an electronic control for determining a load moment of the boom about the horizontal axis. It should be prevented that a permissible load torque is exceeded.
  • the proposed control is intended to prevent overturning of a scaffold intended for the boom, chassis or the like, it being assumed that a substantially stationary operation of the boom, even if the application is proposed here on chassis.
  • the application of the control disclosed here for vehicles seems unsuitable, since in particular dynamic aspects of a mobile frame or chassis are not taken into account.
  • the object underlying the invention is seen to provide a charger of the type mentioned, by which the aforementioned disadvantages are overcome.
  • a charger of the type mentioned above is formed such that the sensor is designed and arranged such that a critical load condition on the charger is detectable and that the sensor is arranged on a vehicle axle of the charger.
  • the sensor is therefore arranged on an axis of the vehicle and signals at correspondingly high, one-sided load a critical state of charge.
  • strain gauges or force sensors can be used. It is also conceivable to position the sensor at another suitable location and, for example, to define the inclination of a vehicle frame relative to the vehicle axle as a critical state of charge state.
  • volume flow varying means the operability of the controlled via a mechanically controlled control unit hydraulic cylinder is influenced such that a volume flow of the hydraulic fluid flowing into one of the two chambers of the hydraulic cylinder is limited or reduced, so that the speed at which a certain amount of Hydraulic fluid flows into one of the chambers flows limited or reduced and ultimately thereby the movement of the hydraulic cylinder and the piston is slowed down.
  • the volume flow of the hydraulic fluid flowing into the chamber of the hydraulic cylinder is thereby reduced more strongly, the closer one approaches a critical value for the load state, which is predetermined by the electronic control unit.
  • the functions of the hydraulic cylinder are first slowed down and then finally completely prevented.
  • the volume flow limiting means comprise at least one controllable by the electronic control unit electro-hydraulic pressure relief valve and are arranged in a connecting line extending between the rod-side and piston-side supply line.
  • the electrohydraulic pressure relief valve can be increasingly opened depending on the load signal or overload signal supplied by the sensor. The further you go that is, the preset threshold approaches, the greater the risk that the vehicle tilts, and the lower the pressure relief valves are set or the more the relief valves are opened.
  • more and more volume of hydraulic fluid can flow away from one connecting line into the other connecting line. Due to the resulting decreasing volume flow for the affected, connected to the rod-side or piston-side supply line chamber, the piston of the hydraulic cylinder is moved less quickly or is slowing down to a standstill.
  • a check valve is provided in the connection line, so that the hydraulic fluid can flow only in one direction through the pressure relief valve from the rod-side supply line into the piston-side supply line, or vice versa.
  • a check valve is already integrated in the pressure relief valve.
  • the hydraulic cylinder can be operated in the opposite direction of movement as usual.
  • a plurality of hydraulic cylinders are arranged in the hydraulic arrangement and thus a plurality of control devices for controlling the hydraulic cylinders can be used.
  • a plurality of electro-hydraulic pressure relief valves can be used correspondingly, which are adjusted by the electronic control unit in response to the sensor signal.
  • the volume flow limiting means also comprise at least one controllable by the electronic control unit electro-hydraulic pressure relief valve, but they are arranged in a branching from the rod side or piston side supply line to the hydraulic tank discharge line.
  • the branched off via the pressure relief valve from the rod side or piston-side supply line hydraulic fluid is fed directly into the hydraulic tank and not in the piston-side or rod-side supply line.
  • the pressure acting in the previous exemplary embodiment connecting line
  • a pressure relief valve which is arranged in a directly leading into the hydraulic tank drain line, this is not the case.
  • the charger is preferably designed as a telescopic loader, wherein the boom via a first hydraulic cylinder in its angle and a second hydraulic cylinder in its length is variable and wherein a third hydraulic cylinder may be provided with which a tool arranged on the boom is pivotable.
  • a third hydraulic cylinder may be provided with which a tool arranged on the boom is pivotable.
  • the charger comprises a front loader, wherein the boom is designed as a rocker of a front loader, which is variable in its angle of attack via a first or a first and a second hydraulic cylinder.
  • a third hydraulic cylinder may be provided, with which a tool provided on the boom, for example a loading shovel or a loading fork, can be pivoted.
  • FIG. 1 a charger 10 is shown in the form of a telescopic loader.
  • the telescopic loader has a frame 12, on which a boom 14 is articulated.
  • the frame is supported by a front axle 16 and a rear axle 18 with respective front and rear wheels 20, 22.
  • the boom 14 is formed as a telescopic boom and is articulated via a hydraulic cylinder 24 in its angle relative to the frame 12 adjustable.
  • a second hydraulic cylinder is arranged inside the boom 14 (not shown) and allows the extension and retraction (telescoping) of the boom.
  • a third hydraulic cylinder is disposed at the free end of the boom 14 in the interior and allows the pivoting or tilting of a loading tool 26th
  • the charger 10 has a hydraulic source 28 and a hydraulic tank 30, which are arranged below the vehicle body and serve to supply the hydraulic components.
  • the hydraulic components are essentially in FIG. 2 shown.
  • the hydraulic arrangement 36 comprises the hydraulic cylinder 24, and optionally the hydraulic cylinder (not shown) for telescoping the boom and tilting the loading tool.
  • the hydraulic cylinder 24 is connected via a first and second hydraulic supply line 38, 40 with a mechanically controllable control unit 42, via which the connection of the supply lines 38, 40 with the hydraulic pump 28 and the hydraulic tank 30 can be produced.
  • the control unit 42 is mechanically connected to the operating device 34, for example via building trains, so that a displacement of the control device 42 or of the valve slide of the control unit 42 can take place by adjusting the operating device 34.
  • a load-holding valve 44 is arranged in the hub Leten chamber of the hydraulic cylinder 24 associated supply line 40.
  • the load holding valve comprises a pressure relief valve 46 which can be opened in the direction of the control unit 42, which is arranged in the supply line 40 and can be opened via control pressure lines 48, 50, which are connected to both supply lines 38, 40, and in the direction of the hydraulic cylinder, arranged in a bypass line 24 opens check valve 52.
  • the load-holding valve 44 serves to ensure that in the event of a pipe break on the lift side of the hydraulic cylinder 24, no hydraulic fluid can escape and the hydraulic cylinder 24 maintains its position.
  • the control unit 42 comprises three slide positions, one for lifting, one for lowering and another for holding the hydraulic cylinder.
  • the control unit 42 is formed as a mechanically switchable or mechanically controllable proportional valve and can be mechanically controlled or adjusted via an actuating device 54, wherein the actuating device 54 is mechanically coupled to the operating device 34.
  • the mechanically actuatable control device 42 establishes a connection or disconnection of the hydraulic pump 28 with the supply lines 38, 40.
  • an operating lever located on the operating device 34 is pushed forward, whereby the operation of the control unit 42 takes place and this is shifted to its lifting position and the hydraulic cylinder 24 is filled with hydraulic fluid on the stroke side, that is extended.
  • a corresponding opposite actuation of the actuating lever would cause a displacement of the control unit 42 in the lowering position, whereupon the hydraulic cylinder 24 would be drained.
  • a connecting line 56 is provided, which extends between the two supply lines 38, 40.
  • a check valve 58 closing in the direction of the rod-side supply line 38 is arranged, which prevents hydraulic fluid from flowing from the piston-side supply line 40 into the rod-side supply line 38.
  • an electro-hydraulic pressure relief valve 62 is arranged in the connecting line 56.
  • the pressure relief valve 62 is arranged such that hydraulic fluid can flow out of the rod-side supply line 38 in the direction of the piston-side supply line 40.
  • the electro-hydraulic pressure relief valve 62 is connected to an electronic control unit 64.
  • the overpressure valve 62 opens hydraulic fluid into the piston-side supply line and into the piston Hydraulic tank 30 drains, resulting in that the adjustment speed of the hydraulic cylinder 24 is reduced, since the volume flow of the located in the rod-side supply line hydraulic fluid is reduced. That is, the amount of hydraulic fluid flowing into the rod-side chamber of the hydraulic cylinder decreases and thus the operation of the hydraulic cylinder 24, in this case the lowering of the hydraulic cylinder 24, is slowed down.
  • the arrangement of the check valve 58 and the electro-hydraulic pressure relief valve 62 can be made opposite, so that hydraulic fluid from the piston-side supply line 40 can flow into the rod-side supply line 38. In this case, then the lifting of the hydraulic cylinder 24 would be slowed down.
  • the control of the pressure relief valve 62 is performed by the electronic control unit 64, which in turn receives control signals from a load sensor 66. Depending on the load condition, the sensor 66 signals a more or less critical load condition. If one approaches the critical load state, the control signal emitted by the electronic control unit 64 also amplifies to adjust the overpressure valve 62, which is then opened further, so that the outflowing volume flow increases.
  • the adjustment or the gain of the control signal is preferably proportional to the signal supplied by the sensor.
  • the sensor is preferably arranged on the rear axle 18 of the charger 10.
  • the sensor 66 is designed as a strain gauge and registers or detects the deflection of the rear axle 18. From the signal values for the deflection can then be closed to the loading or unloading of the rear axle 18. If the load on the rear axle 18 decreases progressively, this may indicate a critical load condition, namely at the latest when no load on the rear axle 18 is detected or signaled. In this case, the charger 10 begins to tip over. The same is also conceivable for the front axle 16.
  • FIG. 3 an alternative embodiment for a hydraulic arrangement 56 'is shown in which instead of the connecting line 56 from FIG. 2 a drain line 56 'is arranged, in which the electro-hydraulic pressure relief valve 62 is arranged.
  • the drain line 56 ' branches off from the rod-side supply line 38 and leads into the hydraulic tank 30.
  • hydraulic fluid can flow directly into the hydraulic tank 30.
  • the control of the pressure relief valve is analogous to that in FIG. 2 illustrated embodiment.
  • hydraulic assembly 36 ' is not provided a check valve 58, since no connection of the piston-side supply line 40 to the drain line 56' is made.
  • Analogous to the in FIG. 2 illustrated embodiment is shown in FIG.
  • control pressure line 56 with the lifting position of the control unit 42 and thus the lifting of the hydraulic cylinder 24 can be controlled, provided with an electro-hydraulic pressure relief valve 62 and connected.
  • the piston-side supply line 40 would be connected to a corresponding discharge line 56 'with electro-hydraulic overpressure valve 62.
  • FIG. 4 shows as a further embodiment, a charger 10 in the form of a tractor 68 with front loader 70, wherein the same reference numerals apply to the same components of the charger 10, such as frame 12, front axle 16, rear axle 16, wheels 20, 22, loading tool 26 and cabin 32.
  • the rockers 70 the two sides of the tractor 68th are arranged, a boom, by its operation in certain situations and overloads critical load conditions of the charger 10 can be caused.
  • the arranged to operate the rocker arms 70 hydraulic cylinder 74 and arranged to operate the loader tool 26 hydraulic cylinder 76 are analogous to those in the Figures 2 and 3 operated hydraulic arrangements 36, 36 'operated.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mining & Mineral Resources (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Component Parts Of Construction Machinery (AREA)

Claims (6)

  1. Appareil de chargement comprenant un bras à commande hydraulique (14, 72), un capteur (66) pour contrôler l'état de charge au niveau de l'appareil de chargement (10) et un agencement hydraulique (36, 36') pour actionner le bras (14, 72) et/ou un outil (26) fixé au bras (14, 72), l'agencement hydraulique (36, 36') présentant au moins un vérin hydraulique (24) avec une conduite d'alimentation (38, 40) respective côté tige et côté piston, au moins un appareil de commande (42) pouvant être commuté mécaniquement pour la commande de l'au moins un vérin hydraulique (24), une source de fluide hydraulique (28), un réservoir de fluide hydraulique (30) et une unité de commande électronique (64), des moyens (62) limitant le débit volumique étant prévus entre l'appareil de commande (42) et le vérin hydraulique (24), ces moyens permettant, en fonction d'un signal de capteur fourni par le capteur (66), de limiter un débit volumique dans au moins l'une des conduites d'alimentation (38, 40) respectives côté tige ou côté piston du vérin hydraulique (24), caractérisé en ce que le capteur (66) est réalisé et disposé de telle sorte qu'un état de charge critique au niveau de l'appareil de chargement (10) puisse être détecté et en ce que le capteur (66) est disposé sur un essieu de véhicule (16, 18) de l'appareil de chargement (10).
  2. Appareil de chargement selon la revendication 1, caractérisé en ce que les moyens (62) limitant le débit volumique comprennent au moins une soupape de surpression électrohydraulique pouvant être commandée par l'unité de commande électronique (64), et sont disposés dans une conduite de liaison (56) s'étendant entre les conduites d'alimentation (38, 40) côté tige et côté piston.
  3. Appareil de chargement selon la revendication 2, caractérisé en ce que la conduite de liaison (56) présente un clapet anti-retour (58) qui bloque un débit volumique dans une direction d'écoulement.
  4. Appareil de chargement selon la revendication 1, caractérisé en ce que les moyens (62) limitant le débit volumique comprennent au moins une soupape de surpression électrohydraulique pouvant être commandée par l'unité de commande électronique (64), et sont disposés dans une conduite d'évacuation (56') partant de la conduite d'alimentation (38, 40) côté tige ou côté piston vers le réservoir de fluide hydraulique (30).
  5. Appareil de chargement selon l'une quelconque des revendications précédentes, caractérisé en ce que l'appareil de chargement (10) est réalisé sous forme de chargeur télescopique et l'angle d'inclinaison du bras (14) peut être modifié par le biais d'un premier vérin hydraulique (24), et la longueur du bras peut être modifiée par le biais d'un deuxième vérin hydraulique, un troisième vérin hydraulique pouvant être prévu, lequel permet de faire pivoter un outil (26) prévu sur le bras (14).
  6. Appareil de chargement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'appareil de chargement (10) comprend un chargeur frontal (70) et le bras est réalisé sous forme de bielle oscillante (72) d'un chargeur frontal (70), dont l'angle d'inclinaison peut être modifié par le biais d'un premier ou d'un premier et d'un deuxième vérin hydraulique (24), un troisième vérin hydraulique (24) pouvant être prévu pour faire pivoter un outil (26) prévu sur la bielle oscillante (72).
EP07115448A 2006-09-08 2007-08-31 Appareil de chargement Not-in-force EP1897847B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006042372A DE102006042372A1 (de) 2006-09-08 2006-09-08 Ladegerät

Publications (3)

Publication Number Publication Date
EP1897847A2 EP1897847A2 (fr) 2008-03-12
EP1897847A3 EP1897847A3 (fr) 2009-06-17
EP1897847B1 true EP1897847B1 (fr) 2012-06-06

Family

ID=38683486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07115448A Not-in-force EP1897847B1 (fr) 2006-09-08 2007-08-31 Appareil de chargement

Country Status (5)

Country Link
US (1) US7845896B2 (fr)
EP (1) EP1897847B1 (fr)
JP (1) JP5503103B2 (fr)
DE (1) DE102006042372A1 (fr)
ES (1) ES2389136T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016205582A1 (de) * 2016-04-05 2017-10-05 Robert Bosch Gmbh Hydraulische Antriebsvorrichtung mit Regenerationsbetrieb
USD832551S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Loader
USD832552S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Lift arm for loader
US10626576B2 (en) 2016-12-16 2020-04-21 Clark Equipment Company Loader with telescopic lift arm

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IT1402191B1 (it) * 2010-09-23 2013-08-28 Merlo Project Srl Veicolo sollevatore.
CA2815333C (fr) * 2010-11-12 2015-05-19 Jlg Industries, Inc. Systeme de surveillance de stabilite longitudinale
ITTO20110399A1 (it) * 2011-05-06 2012-11-07 Merlo Project Srl Veicolo sollevatore
DE102011101553A1 (de) * 2011-05-14 2012-11-15 Robert Bosch Gmbh Hubwerk
JP6177562B2 (ja) * 2013-03-28 2017-08-09 三菱日立パワーシステムズ株式会社 油圧装置及び原動装置
EP2829504A1 (fr) * 2013-07-23 2015-01-28 Palfinger Platforms GmbH Procédé de commande d'une machine de travail et système hydraulique pour une plate-forme élévatrice
EP3181763A1 (fr) * 2015-12-15 2017-06-21 Caterpillar Global Mining LLC Bloc de vanne à actionneur double hydraulique
IT201700047745A1 (it) * 2017-05-03 2018-11-03 Cnh Ind Italia Spa Veicolo provvisto di un braccio comprendente un circuito di controllo idraulico avente una valvola di controllo di carico
CN108455487A (zh) * 2018-03-16 2018-08-28 王静 一种手扶液压搬运装置及其使用方法
FR3083536B1 (fr) * 2018-07-05 2021-06-11 Guima Palfinger Dispositif de levage comprenant un circuit hydraulique perfectionne pour autoriser une phase de retour bennage rapide

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DE4223695C2 (de) 1992-07-21 1994-12-08 Weber Anlagenbau Gmbh & Co Kg Steuerung für das Verschwenken eines in seiner effektiven Länge veränderlichen Auslegers
JPH10310394A (ja) * 1997-05-15 1998-11-24 Toyota Autom Loom Works Ltd フォークリフトのティルト制御装置
DE19853523C1 (de) * 1998-11-20 2000-03-09 Schaeff Karl Gmbh & Co Fahrbarer Schaufellader
JP2001226096A (ja) * 2000-02-15 2001-08-21 Komatsu Forklift Co Ltd 産業車両の転倒警報装置及び転倒防止装置
GB2390595B (en) * 2002-07-12 2005-08-24 Bamford Excavators Ltd Control system for a machine
EP1496009B1 (fr) * 2003-07-05 2007-09-05 Deere & Company Suspension hydraulique
DE102004031248A1 (de) * 2004-06-29 2006-02-09 Plustech Oy Ladegerät
US7204084B2 (en) * 2004-10-29 2007-04-17 Caterpillar Inc Hydraulic system having a pressure compensator
DE102005043447A1 (de) * 2005-09-13 2007-03-15 Deere & Company, Moline Ladegerät sowie Verfahren für ein Ladegerät
SE531309C2 (sv) * 2006-01-16 2009-02-17 Volvo Constr Equip Ab Styrsystem för en arbetsmaskin och förfarande för styrning av en hydraulcylinder hos en arbetsmaskin

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016205582A1 (de) * 2016-04-05 2017-10-05 Robert Bosch Gmbh Hydraulische Antriebsvorrichtung mit Regenerationsbetrieb
US10626576B2 (en) 2016-12-16 2020-04-21 Clark Equipment Company Loader with telescopic lift arm
USD832551S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Loader
USD832552S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Lift arm for loader

Also Published As

Publication number Publication date
EP1897847A2 (fr) 2008-03-12
US7845896B2 (en) 2010-12-07
JP5503103B2 (ja) 2014-05-28
US20080073155A1 (en) 2008-03-27
JP2008063142A (ja) 2008-03-21
DE102006042372A1 (de) 2008-03-27
EP1897847A3 (fr) 2009-06-17
ES2389136T3 (es) 2012-10-23

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