EP1728759A3 - Device for determining the lifting height of a load lifting means of an industrial truck - Google Patents

Device for determining the lifting height of a load lifting means of an industrial truck Download PDF

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Publication number
EP1728759A3
EP1728759A3 EP06010638A EP06010638A EP1728759A3 EP 1728759 A3 EP1728759 A3 EP 1728759A3 EP 06010638 A EP06010638 A EP 06010638A EP 06010638 A EP06010638 A EP 06010638A EP 1728759 A3 EP1728759 A3 EP 1728759A3
Authority
EP
European Patent Office
Prior art keywords
load
lifting
determining
height
industrial truck
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
EP06010638A
Other languages
German (de)
French (fr)
Other versions
EP1728759B1 (en
EP1728759A2 (en
Inventor
Wilfried Dipl.-Ing. Korf
Piotr Dipl.-Ing. Mehloch
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.)
Jungheinrich AG
Original Assignee
Jungheinrich AG
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 Jungheinrich AG filed Critical Jungheinrich AG
Publication of EP1728759A2 publication Critical patent/EP1728759A2/en
Publication of EP1728759A3 publication Critical patent/EP1728759A3/en
Application granted granted Critical
Publication of EP1728759B1 publication Critical patent/EP1728759B1/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
    • B66F9/24—Electrical devices or systems
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2838—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT with out using position sensors, e.g. by volume flow measurement or pump speed

Landscapes

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

Abstract

Vorrichtung zur Bestimmung der Hubhöhe eines Lasttragmittels an einem Flurförderzeug, das mit Hilfe mindestens eines Freihub- (10) und mindestens eines Lasthubzylinders (12) an einem Hubgerüst angehoben oder abgesenkt werden kann, wobei in der Leitung (14) zwischen einer Hydraulikpumpe (16) und dem Freihubzylinder (10) ein Durchflußmengenmesser (16) angeordnet ist, und eine mit dem Durchflußmengenmesser (16) verbundene Auswerteeinheit (18) vorgesehen ist, die aus dem Meßsignal des Durchflußmengenmessers (16) die jeweilige Hubhöhe berechnet und eine Erfassungsvorrichtung (22) vorgesehen ist, die das Ende der Freihubbewegung bzw. den Anfang der Bewegung des Lasthubzylinders erfaßt und ein Signal auf die Auswerteeinheit (18) gibt zur Anwendung eines geänderten Faktors auf die Berechnung der Hubhöhe.

Figure imgaf001
Apparatus for determining the lifting height of a load-bearing means on an industrial truck which can be raised or lowered by means of at least one free-lift (10) and at least one load-lifting cylinder (12) on a mast, wherein in the conduit (14) between a hydraulic pump (16) and the Freihubzylinder (10) a flow meter (16) is arranged, and an evaluation unit (18) connected to the Durchflußmengenmesser (16) is provided which calculates the respective stroke height from the measured signal of the flow meter (16) and a detection device (22) is, which detects the end of Freihubbewegung or the beginning of the movement of the load lifting cylinder and a signal to the evaluation unit (18) are for applying a changed factor on the calculation of the lifting height.
Figure imgaf001
EP20060010638 2005-06-03 2006-05-24 Industrial truck with a device for determining the lifting height of a load lifting means of the industrial truck Active EP1728759B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510025507 DE102005025507A1 (en) 2005-06-03 2005-06-03 Device for determining the lifting height of a load carrier on an industrial truck

Publications (3)

Publication Number Publication Date
EP1728759A2 EP1728759A2 (en) 2006-12-06
EP1728759A3 true EP1728759A3 (en) 2008-01-23
EP1728759B1 EP1728759B1 (en) 2009-09-02

Family

ID=36940371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060010638 Active EP1728759B1 (en) 2005-06-03 2006-05-24 Industrial truck with a device for determining the lifting height of a load lifting means of the industrial truck

Country Status (2)

Country Link
EP (1) EP1728759B1 (en)
DE (2) DE102005025507A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5353371B2 (en) † 2008-05-26 2013-11-27 株式会社豊田自動織機 Multistage mast type forklift load measuring device
FR2975089B1 (en) * 2011-05-10 2013-04-26 Manitou Bf TELESCOPIC HANDLING ARRAY MEASURING DEVICE
WO2016043998A1 (en) 2014-09-15 2016-03-24 Crown Equipment Corporation Lift truck with optical load sensing structure
DE102021110349A1 (en) 2021-04-22 2022-10-27 Franz Xaver Meiller Fahrzeug- Und Maschinenfabrik - Gmbh & Co Kg Hydraulic system for a working machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220333A1 (en) * 1992-06-22 1993-12-23 Marco Systemanalyse Entw Measuring piston displacement in hydraulic working cylinder - determining flow of hydraulic medium through cylinder from pressure difference measurement across choke
DE4306680A1 (en) * 1993-03-04 1994-09-08 Jungheinrich Ag Method of determining the lifting height of a vertically adjustable load-suspension means of an industrial truck
DE19508346C1 (en) * 1995-03-09 1996-06-20 Jungheinrich Ag Height detection system for fork lift truck lifting forks

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259037A1 (en) * 2002-12-17 2004-07-08 Still Gmbh Lifting-height measuring device for warehouse truck, has flexible tube filled with fluid and attached to liftable component of truck, and connected to pressure sensor
DE202004017625U1 (en) * 2004-11-12 2005-02-10 Ziegler, Gerhard Mobile 'cherry picker' work platform has load sensor attached to hydraulic lift cylinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220333A1 (en) * 1992-06-22 1993-12-23 Marco Systemanalyse Entw Measuring piston displacement in hydraulic working cylinder - determining flow of hydraulic medium through cylinder from pressure difference measurement across choke
DE4306680A1 (en) * 1993-03-04 1994-09-08 Jungheinrich Ag Method of determining the lifting height of a vertically adjustable load-suspension means of an industrial truck
DE19508346C1 (en) * 1995-03-09 1996-06-20 Jungheinrich Ag Height detection system for fork lift truck lifting forks

Also Published As

Publication number Publication date
DE502006004707D1 (en) 2009-10-15
DE102005025507A1 (en) 2006-12-07
EP1728759B1 (en) 2009-09-02
EP1728759A2 (en) 2006-12-06

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