EP1052215A3 - Hydraulic lifting device - Google Patents

Hydraulic lifting device Download PDF

Info

Publication number
EP1052215A3
EP1052215A3 EP00108142A EP00108142A EP1052215A3 EP 1052215 A3 EP1052215 A3 EP 1052215A3 EP 00108142 A EP00108142 A EP 00108142A EP 00108142 A EP00108142 A EP 00108142A EP 1052215 A3 EP1052215 A3 EP 1052215A3
Authority
EP
European Patent Office
Prior art keywords
lifting
speed
lifting cylinder
hydraulic
hydraulic oil
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
EP00108142A
Other languages
German (de)
French (fr)
Other versions
EP1052215A2 (en
EP1052215B1 (en
Inventor
Octavian Mare
Hans-Peter Schrad
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.)
Dambach Lagersysteme GmbH
Original Assignee
Dambach Lagersysteme GmbH
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 Dambach Lagersysteme GmbH filed Critical Dambach Lagersysteme GmbH
Publication of EP1052215A2 publication Critical patent/EP1052215A2/en
Publication of EP1052215A3 publication Critical patent/EP1052215A3/en
Application granted granted Critical
Publication of EP1052215B1 publication Critical patent/EP1052215B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Eine hydraulische Hubvorrichtung insbesondere für batteriegetriebene Flurförderzeuge umfaßt eine von einem Elektromotor (M) antreibbare Pumpe (P), mittels der im Lasthebebetrieb zumindest einem hydraulischen Hubzylinder (13) Hydrauliköl aus einem Vorratsbehälter (11) über eine Zuführleitung (L1,L4.1,L4.2) zuführbar ist, wobei das Hydrauliköl im Lastsenkbetrieb von dem Hubzylinder (13) über eine Rückführleitung (L4.1,L4.2,L1.3,L2,L1.1,L1.2,L6,L7,L5) unter Durchströmen eines den als Generator arbeitenden Elektromotor (M) antreibenden Hydromotors (P) in den Vorratsbehälter (11) zurückgefördert werden kann, und eine Steuervorrichtung zur Änderung der Hub- bzw. Senkgeschwindigkeit des Hubzylinders (13). Dabei ist vorgesehen, daß die Steuervorrichtung eine Maß-Sensorvorrichtung (20) zur Erfassung der Hub- bzw. Senkgeschwindigkeit des Hubzylinders (13) aufweist, wobei die Geschwindigkeit des Hubzylinders (13) mittels der Drehzahl des Motors (M) regelbar ist, wenn die erfaßte Hubgeschwindigkeit einen ersten Grenzwert (vHG) bzw. die erfaßte Senkgeschwindigkeit einen zweiten Grenzwert (vSG) überschreitet, und wobei die Geschwindigkeit des Hubzylinders (13) bei Unterschreiten der Grenzwerte mittels des Hydrauliköl-Volumenstroms in der Zuführ- bzw. Rückführleitung regelbar ist.

Figure 00000001
A hydraulic lifting device, in particular for battery-powered industrial trucks, comprises a pump (P) which can be driven by an electric motor (M) by means of at least one hydraulic lifting cylinder (13) in the lifting operation. Hydraulic oil from a reservoir (11) via a supply line (L1, L4.1, L4 .2) can be supplied, wherein the hydraulic oil in the load lowering operation of the lifting cylinder (13) via a return line (L4.1, L4.2, L1.3, L2, L1.1, L1.2, L6, L7, L5) under Flowing through a working as a generator electric motor (M) driving hydraulic motor (P) in the reservoir (11) can be fed back, and a control device for changing the lifting or lowering speed of the lifting cylinder (13). It is provided that the control device has a Maß-sensor device (20) for detecting the lifting or lowering speed of the lifting cylinder (13), wherein the speed of the lifting cylinder (13) by means of the rotational speed of the motor (M) is controllable when the detected lifting speed a first limit (v HG ) or the detected lowering speed exceeds a second threshold (v SG ), and wherein the speed of the lifting cylinder (13) is below the limit values by means of the hydraulic oil volume flow in the supply and return line regulated ,
Figure 00000001
EP20000108142 1999-05-10 2000-04-13 Hydraulic lifting device Expired - Lifetime EP1052215B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999121629 DE19921629B4 (en) 1999-05-10 1999-05-10 Hydraulic lifting device
DE19921629 1999-05-10

Publications (3)

Publication Number Publication Date
EP1052215A2 EP1052215A2 (en) 2000-11-15
EP1052215A3 true EP1052215A3 (en) 2005-09-21
EP1052215B1 EP1052215B1 (en) 2012-02-15

Family

ID=7907668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000108142 Expired - Lifetime EP1052215B1 (en) 1999-05-10 2000-04-13 Hydraulic lifting device

Country Status (2)

Country Link
EP (1) EP1052215B1 (en)
DE (1) DE19921629B4 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1188709B1 (en) * 2000-09-18 2006-11-02 Still Gmbh Lifting device
DE10110764A1 (en) * 2001-03-07 2002-09-19 Dambach Lagersysteme Gmbh & Co Hydraulic lifting device
DE10154449A1 (en) * 2001-11-06 2003-05-15 Dambach Lagersysteme Gmbh & Co Hydraulic lifting device, in particular for battery-powered industrial trucks, and method for controlling it
DE102004039848A1 (en) 2004-08-17 2006-03-09 Jungheinrich Ag Fluid circuit and truck with fluid circuit
EP2123594A1 (en) * 2008-05-23 2009-11-25 BT Products AB Industrial lift truck with speed control
US8196464B2 (en) * 2010-01-05 2012-06-12 The Raymond Corporation Apparatus and method for monitoring a hydraulic pump on a material handling vehicle
DE102011016542A1 (en) * 2011-04-08 2012-10-11 Jungheinrich Aktiengesellschaft Industrial truck, in particular reach truck with a mast
GB2575480A (en) * 2018-07-11 2020-01-15 Parker Hannifin Emea Sarl A control valve assembly for a load handling vehicle
US20220314848A1 (en) * 2021-04-02 2022-10-06 Mubeen Aziz Elevated Vehicle System

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548296A (en) * 1980-02-26 1985-10-22 Oil Drive Kogyo, Ltd. Hydraulic elevator
DE4416173A1 (en) * 1994-05-06 1995-11-09 Jungheinrich Ag Hydraulic lifting system for battery operated ground conveyor vehicle
DE4317782C2 (en) * 1993-05-28 1996-01-18 Jungheinrich Ag Hydraulic lifting device for battery-powered industrial trucks or the like
EP0908413A2 (en) * 1997-10-08 1999-04-14 Still Wagner GmbH & Co. KG Lift truck with a load grasping device and method for descending the load grasping device
DE19748782A1 (en) * 1997-11-05 1999-05-06 Clark Material Handling Gmbh Hydraulic lifting arrangement for battery-powered fork-lift truck or similar

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2095861B (en) * 1981-03-31 1985-01-03 Toyoda Automatic Loom Works Fork lift control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548296A (en) * 1980-02-26 1985-10-22 Oil Drive Kogyo, Ltd. Hydraulic elevator
DE4317782C2 (en) * 1993-05-28 1996-01-18 Jungheinrich Ag Hydraulic lifting device for battery-powered industrial trucks or the like
DE4416173A1 (en) * 1994-05-06 1995-11-09 Jungheinrich Ag Hydraulic lifting system for battery operated ground conveyor vehicle
EP0908413A2 (en) * 1997-10-08 1999-04-14 Still Wagner GmbH & Co. KG Lift truck with a load grasping device and method for descending the load grasping device
DE19748782A1 (en) * 1997-11-05 1999-05-06 Clark Material Handling Gmbh Hydraulic lifting arrangement for battery-powered fork-lift truck or similar

Also Published As

Publication number Publication date
EP1052215A2 (en) 2000-11-15
DE19921629B4 (en) 2005-05-25
EP1052215B1 (en) 2012-02-15
DE19921629A1 (en) 2000-11-16

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