EP0908413A3 - Lift truck with a load grasping device and method for descending the load grasping device - Google Patents

Lift truck with a load grasping device and method for descending the load grasping device Download PDF

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Publication number
EP0908413A3
EP0908413A3 EP98118873A EP98118873A EP0908413A3 EP 0908413 A3 EP0908413 A3 EP 0908413A3 EP 98118873 A EP98118873 A EP 98118873A EP 98118873 A EP98118873 A EP 98118873A EP 0908413 A3 EP0908413 A3 EP 0908413A3
Authority
EP
European Patent Office
Prior art keywords
grasping device
lift truck
load grasping
hydraulic pump
suspension 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
EP98118873A
Other languages
German (de)
French (fr)
Other versions
EP0908413A2 (en
EP0908413B1 (en
Inventor
Hartmut Nedele
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.)
Still Wagner GmbH and Co KG
Original Assignee
Still Wagner GmbH and Co KG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7844933&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0908413(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Still Wagner GmbH and Co KG filed Critical Still Wagner GmbH and Co KG
Publication of EP0908413A2 publication Critical patent/EP0908413A2/en
Publication of EP0908413A3 publication Critical patent/EP0908413A3/en
Application granted granted Critical
Publication of EP0908413B1 publication Critical patent/EP0908413B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14—Energy-recuperation means

Landscapes

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

Abstract

Gegenstand der Erfindung ist ein Flurförderzeug mit einer vertikal beweglichen Lastaufnahmevorrichtung. Eine Vorrichtung zum vertikalen Bewegen der Lastaufnahmevorrichtung weist mindestens einen Hydraulikzylinder (5) und mindestens eine mittels eines Elektromotors (1, 1a) antreibbare Hydraulikpumpe (2, 2a) auf. Die angetriebene Hydraulikpumpe (2, 2a) weist eine Druckseite und eine Saugseite auf. Erfindungsgemäß ist die Saugseite der angetriebenen Hydraulikpumpe (2, 2a) mit dem Hydraulikzylinder (5) verbindbar. Zur Steuerung des Anhebens und/oder des Absenkens der Lastaufnahmevorrichtung ist mindestens ein stufenlos betätigbares elektrisches Schaltelement vorgesehen, das mit der elektrischen Impulssteuereinheit in Wirkverbindung steht. Besondere Vorteile ergeben sich, wenn das Flurförderzeug als Hochhubwagen, vorzugsweise als deichselgeführter Hochhubwagen ausgeführt ist.

Figure 00000001
The invention relates to an industrial truck with a vertically movable load suspension device. A device for moving the load suspension device vertically has at least one hydraulic cylinder (5) and at least one hydraulic pump (2, 2a) which can be driven by means of an electric motor (1, 1a). The driven hydraulic pump (2, 2a) has a pressure side and a suction side. According to the invention, the suction side of the driven hydraulic pump (2, 2a) can be connected to the hydraulic cylinder (5). To control the raising and / or lowering of the load suspension device, at least one continuously actuable electrical switching element is provided, which is operatively connected to the electrical pulse control unit. There are particular advantages if the industrial truck is designed as a high-lift truck, preferably as a pedestrian-controlled high-lift truck.
Figure 00000001
EP98118873A 1997-10-08 1998-10-06 Lift truck with a load grasping device Expired - Lifetime EP0908413B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19744429A DE19744429A1 (en) 1997-10-08 1997-10-08 Industrial truck with a load suspension device and method for lowering the load suspension device
DE19744429 1997-10-08

Publications (3)

Publication Number Publication Date
EP0908413A2 EP0908413A2 (en) 1999-04-14
EP0908413A3 true EP0908413A3 (en) 2001-08-08
EP0908413B1 EP0908413B1 (en) 2005-12-21

Family

ID=7844933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98118873A Expired - Lifetime EP0908413B1 (en) 1997-10-08 1998-10-06 Lift truck with a load grasping device

Country Status (2)

Country Link
EP (1) EP0908413B1 (en)
DE (2) DE19744429A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921629B4 (en) * 1999-05-10 2005-05-25 Dambach Lagersysteme Gmbh Hydraulic lifting device
DE29911686U1 (en) 1999-07-06 1999-09-16 Heilmeier & Weinlein Electro-hydraulic lifting module
WO2001081027A1 (en) * 2000-04-20 2001-11-01 Procontrol Ag Method and drive system for the control/regulation of linear pressure/cast movement
DE10033094B4 (en) * 2000-07-07 2005-12-08 Buchholz Hydraulik Gmbh control device
DE10048215A1 (en) * 2000-09-28 2002-04-11 Still Wagner Gmbh & Co Kg 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
DE20212459U1 (en) * 2002-08-13 2003-12-24 Hawe Hydraulik Gmbh & Co. Kg Electro-hydraulic brake module
JP4796350B2 (en) * 2005-07-29 2011-10-19 カヤバ工業株式会社 Fluid pressure control circuit with regenerative function
NL1031744C2 (en) * 2006-05-03 2007-11-06 Stertil Bv Lifting system.
FI123664B (en) * 2008-02-29 2013-09-13 Metso Paper Inc Hydraulic system for a load cylinder for an apparatus used in a paper or cardboard machine and a method for pressure regulating a load cylinder in a hydraulic system
DE102009053618A1 (en) * 2009-11-17 2011-05-19 Robert Bosch Gmbh Hydraulic drive with energy recovery
US8966891B2 (en) 2011-09-30 2015-03-03 Caterpillar Inc. Meterless hydraulic system having pump protection
DE102012024647A1 (en) * 2012-12-17 2014-06-18 Jungheinrich Aktiengesellschaft Hydraulic lifting device for a battery-operated industrial truck
US9360023B2 (en) * 2013-03-14 2016-06-07 The Raymond Corporation Hydraulic regeneration system and method for a material handling vehicle
US10844880B2 (en) 2017-01-17 2020-11-24 The Raymond Corporation Variable hydraulic pressure relief systems and methods for a material handling vehicle
WO2021004657A1 (en) * 2019-07-08 2021-01-14 Eaton Intelligent Power Limited Hydraulic system architectures and bidirectional proportional valves usable in the system architectures

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3507231A1 (en) * 1985-03-01 1986-09-04 Messerschmitt-Bölkow-Blohm GmbH, 2800 Bremen Arrangement for the uniform hydraulic lifting and lowering of platforms
DE3602510A1 (en) * 1986-01-28 1987-07-30 Steinbock Gmbh HYDRAULIC LIFTING
DE4140408A1 (en) * 1991-12-07 1993-06-09 Robert Bosch Gmbh, 7000 Stuttgart, De Electrohydraulic control of linear hydraulic actuator - has proportional flow control valve responding to pressure feedback to provide load compensating action
DE4219787C1 (en) * 1992-06-17 1994-01-05 Jungheinrich Ag Vehicle with a battery-electric drive, especially a rear loader
DE4402653A1 (en) * 1994-01-29 1995-08-03 Jungheinrich Ag Hydraulic lifting device via rotating industrial trucks
JPH0826697A (en) * 1994-07-19 1996-01-30 Meikikou:Kk Hydraulic table lift device and control method for ascending and descending speed of table in this device
EP0777055A2 (en) * 1995-11-02 1997-06-04 SME Elettronica S.p.A. A power unit for the supply of hydraulic actuators

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3507231A1 (en) * 1985-03-01 1986-09-04 Messerschmitt-Bölkow-Blohm GmbH, 2800 Bremen Arrangement for the uniform hydraulic lifting and lowering of platforms
DE3602510A1 (en) * 1986-01-28 1987-07-30 Steinbock Gmbh HYDRAULIC LIFTING
DE4140408A1 (en) * 1991-12-07 1993-06-09 Robert Bosch Gmbh, 7000 Stuttgart, De Electrohydraulic control of linear hydraulic actuator - has proportional flow control valve responding to pressure feedback to provide load compensating action
DE4219787C1 (en) * 1992-06-17 1994-01-05 Jungheinrich Ag Vehicle with a battery-electric drive, especially a rear loader
DE4402653A1 (en) * 1994-01-29 1995-08-03 Jungheinrich Ag Hydraulic lifting device via rotating industrial trucks
JPH0826697A (en) * 1994-07-19 1996-01-30 Meikikou:Kk Hydraulic table lift device and control method for ascending and descending speed of table in this device
EP0777055A2 (en) * 1995-11-02 1997-06-04 SME Elettronica S.p.A. A power unit for the supply of hydraulic actuators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *

Also Published As

Publication number Publication date
DE59813292D1 (en) 2006-01-26
EP0908413A2 (en) 1999-04-14
EP0908413B1 (en) 2005-12-21
DE19744429A1 (en) 1999-04-22

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