EP1593645A3 - Hydraulic lifting device for a telescopically extendable fork lift truck mast - Google Patents

Hydraulic lifting device for a telescopically extendable fork lift truck mast Download PDF

Info

Publication number
EP1593645A3
EP1593645A3 EP05445026A EP05445026A EP1593645A3 EP 1593645 A3 EP1593645 A3 EP 1593645A3 EP 05445026 A EP05445026 A EP 05445026A EP 05445026 A EP05445026 A EP 05445026A EP 1593645 A3 EP1593645 A3 EP 1593645A3
Authority
EP
European Patent Office
Prior art keywords
movement
lifting
telescopically extendable
mast
lifting device
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
Application number
EP05445026A
Other languages
German (de)
French (fr)
Other versions
EP1593645A2 (en
EP1593645B1 (en
Inventor
Joakim Bärnström
Jimmy Holler
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.)
Toyota Material Handling Europe AB
Original Assignee
BT Industries AB
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 BT Industries AB filed Critical BT Industries AB
Publication of EP1593645A2 publication Critical patent/EP1593645A2/en
Publication of EP1593645A3 publication Critical patent/EP1593645A3/en
Application granted granted Critical
Publication of EP1593645B1 publication Critical patent/EP1593645B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • B66F9/08—Masts; Guides; Chains
    • 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
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent actuator

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Combustion & Propulsion (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

Device at fork truck where in a telescopically extendable mast in the outermost or uppermost mast section is arranged a movement journaling of movement of the forks over the major part of the height of the uppermost mast section, and where lifting movements are achieved hydraulically by means of one or several hydraulic pistons (4) for the lifting of the mast sections and one or several other hydraulic pistons (3) for the lifting of the forks (8) in relation to the uppermost mast section (5). In the feed conduits to the hydraulic cylinders proportional valves 1, 2 are arranged in order to, at the transition shift between low lift movement and high lift movement and vice versa successively control the oil flow to and from the cylinders of the different systems respectively so that an unnoticeable transition and constant speed is obtained.
EP20050445026 2004-05-03 2005-05-01 Hydraulic lifting device for a telescopically extendable fork lift truck mast Active EP1593645B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0401169 2004-05-03
SE0401169A SE529748C2 (en) 2004-05-03 2004-05-03 Device for forklift

Publications (3)

Publication Number Publication Date
EP1593645A2 EP1593645A2 (en) 2005-11-09
EP1593645A3 true EP1593645A3 (en) 2007-05-02
EP1593645B1 EP1593645B1 (en) 2012-08-08

Family

ID=32466217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050445026 Active EP1593645B1 (en) 2004-05-03 2005-05-01 Hydraulic lifting device for a telescopically extendable fork lift truck mast

Country Status (2)

Country Link
EP (1) EP1593645B1 (en)
SE (1) SE529748C2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2123594A1 (en) * 2008-05-23 2009-11-25 BT Products AB Industrial lift truck with speed control
EP2159186B1 (en) * 2008-08-27 2016-11-23 Toyota Material Handling Manufacturing Sweden AB Double stacker industrial truck with a hydraulic system
DE102009011865B4 (en) 2009-03-05 2021-11-18 Jungheinrich Aktiengesellschaft Lifting device for an industrial truck
DE102011016542A1 (en) * 2011-04-08 2012-10-11 Jungheinrich Aktiengesellschaft Industrial truck, in particular reach truck with a mast
DE102012101949A1 (en) * 2012-03-08 2013-09-12 Linde Material Handling Gmbh Lifting device of a truck
WO2014207474A2 (en) 2013-06-26 2014-12-31 Parker Hannifin Manufacturing Limited Energy efficient electric vehicle control system
US9932213B2 (en) 2014-09-15 2018-04-03 Crown Equipment Corporation Lift truck with optical load sensing structure
DE102016124504A1 (en) 2016-12-15 2018-06-21 Jungheinrich Aktiengesellschaft Lifting device for an industrial truck and such a truck
AU2018202033B2 (en) * 2017-03-23 2023-06-01 The Raymond Corporation Systems and methods for mast stabilization on a material handling vehicle
DE102017121818A1 (en) 2017-09-20 2019-03-21 Jungheinrich Ag Industrial truck, hydraulic system for an industrial truck and method for operating a hydraulic system
DE102018108946A1 (en) * 2018-04-16 2019-10-17 Linde Material Handling Gmbh Truck with a lifting device
DE102018117391A1 (en) * 2018-07-18 2020-01-23 Jungheinrich Ag Industrial truck with a hydraulic system and method for operating a hydraulic system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016194B (en) * 1953-08-07 1957-09-19 Hans Still Ag Hydraulic lifting device for stacking devices with telescopically extendable mast
DE4423644A1 (en) * 1994-07-06 1996-01-11 Buchholz Hydraulik Hydraulic control device for fork lift truck
DE4425455A1 (en) * 1994-07-19 1996-01-25 Bosch Gmbh Robert Hydraulic control unit for at least one double acting hydraulic cylinder for crane
JPH08188398A (en) * 1994-12-28 1996-07-23 Nissan Motor Co Ltd Control method and control circuit for hydraulic cylinder in forklift
DE19710556A1 (en) * 1997-03-14 1998-09-17 Jungheinrich Ag Extendable mast construction for a pallet truck
DE19831828A1 (en) * 1998-07-15 2000-01-20 Linde Ag Hydraulic system for fork lift truck or similar, with first pump serving lifting cylinder and auxiliary consumer, and second one serving lifting cylinder and electric motor
EP1136433A2 (en) * 2000-03-22 2001-09-26 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Industrial vehicle with a device for measuring load weight moment and a method therefor
DE10033094A1 (en) * 2000-07-07 2002-01-17 Buchholz Hydraulik Control module comprises sliding valve, in duct leading from pump, with reflux, stop and throttle valves, and pressure balance
DE10047631A1 (en) * 2000-09-26 2002-04-11 Linde Ag Hydraulic system for battery-operated electric load conveying vehicle has hydraulic unit acting as pump and motor coupled to electrical unit acting as motor and generator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016194B (en) * 1953-08-07 1957-09-19 Hans Still Ag Hydraulic lifting device for stacking devices with telescopically extendable mast
DE4423644A1 (en) * 1994-07-06 1996-01-11 Buchholz Hydraulik Hydraulic control device for fork lift truck
DE4425455A1 (en) * 1994-07-19 1996-01-25 Bosch Gmbh Robert Hydraulic control unit for at least one double acting hydraulic cylinder for crane
JPH08188398A (en) * 1994-12-28 1996-07-23 Nissan Motor Co Ltd Control method and control circuit for hydraulic cylinder in forklift
DE19710556A1 (en) * 1997-03-14 1998-09-17 Jungheinrich Ag Extendable mast construction for a pallet truck
DE19831828A1 (en) * 1998-07-15 2000-01-20 Linde Ag Hydraulic system for fork lift truck or similar, with first pump serving lifting cylinder and auxiliary consumer, and second one serving lifting cylinder and electric motor
EP1136433A2 (en) * 2000-03-22 2001-09-26 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Industrial vehicle with a device for measuring load weight moment and a method therefor
DE10033094A1 (en) * 2000-07-07 2002-01-17 Buchholz Hydraulik Control module comprises sliding valve, in duct leading from pump, with reflux, stop and throttle valves, and pressure balance
DE10047631A1 (en) * 2000-09-26 2002-04-11 Linde Ag Hydraulic system for battery-operated electric load conveying vehicle has hydraulic unit acting as pump and motor coupled to electrical unit acting as motor and generator

Also Published As

Publication number Publication date
SE529748C2 (en) 2007-11-13
SE0401169D0 (en) 2004-05-03
EP1593645A2 (en) 2005-11-09
SE0401169L (en) 2005-11-04
EP1593645B1 (en) 2012-08-08

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