EP0230884A3 - Hydraulic lifting device - Google Patents

Hydraulic lifting device Download PDF

Info

Publication number
EP0230884A3
EP0230884A3 EP87100211A EP87100211A EP0230884A3 EP 0230884 A3 EP0230884 A3 EP 0230884A3 EP 87100211 A EP87100211 A EP 87100211A EP 87100211 A EP87100211 A EP 87100211A EP 0230884 A3 EP0230884 A3 EP 0230884A3
Authority
EP
European Patent Office
Prior art keywords
operational mode
generator
load
lifting
hydraulic
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
EP87100211A
Other languages
German (de)
Other versions
EP0230884B1 (en
EP0230884A2 (en
Inventor
Martin Schmid
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.)
STEINBOCK BOSS GMBH
Original Assignee
Steinbock 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 Steinbock GmbH filed Critical Steinbock GmbH
Priority to AT87100211T priority Critical patent/ATE94149T1/en
Publication of EP0230884A2 publication Critical patent/EP0230884A2/en
Publication of EP0230884A3 publication Critical patent/EP0230884A3/en
Application granted granted Critical
Publication of EP0230884B1 publication Critical patent/EP0230884B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Geology (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Control Of Direct Current Motors (AREA)
  • Lubricants (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

A hydraulic lifting mechanism, particularly suitable for a battery-powered industrial truck, including a hydraulic lifting cylinder, a hydraulic unit, operating as a pump in the load lifting operational mode, and supplying the lifting cylinder with pressure medium, and operating as a motor in the load lowering operational mode during which mode it is actuated by the pressure medium exiting from the lifting cylinder, and a DC generator coupled with the hydraulic unit operating as an electromotor in the load lifting operational mode and as a generator in the load lowering operational mode. A control valve arrangement is provided at the halfway point in the pressure path between the hydraulic cylinder and the hydraulic unit, which is controlled by a lifting mechanism control. In addition, the lifting mechanism control controls a regenerative brake circuit supplied by the DC generator in the load lowering operational mode. The control valve arrangement includes a proportional valve which is opened by the lifting mechanism control in the load lowering operational mode in accordance with a ramp-like function. The regenerative brake circuit is switched on depending on the output current of the DC generator working as a generator, if the generator output current exceeds a predetermined value. Undesirable dropping of the load in the lowering operational mode is hereby prevented during transition to regenerative braking.
EP87100211A 1986-01-28 1987-01-09 Hydraulic lifting device Expired - Lifetime EP0230884B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100211T ATE94149T1 (en) 1986-01-28 1987-01-09 HYDRAULIC LIFT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3602510 1986-01-28
DE19863602510 DE3602510A1 (en) 1986-01-28 1986-01-28 HYDRAULIC LIFTING

Publications (3)

Publication Number Publication Date
EP0230884A2 EP0230884A2 (en) 1987-08-05
EP0230884A3 true EP0230884A3 (en) 1990-05-16
EP0230884B1 EP0230884B1 (en) 1993-09-08

Family

ID=6292792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100211A Expired - Lifetime EP0230884B1 (en) 1986-01-28 1987-01-09 Hydraulic lifting device

Country Status (4)

Country Link
US (1) US4723107A (en)
EP (1) EP0230884B1 (en)
AT (1) ATE94149T1 (en)
DE (2) DE3602510A1 (en)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63230497A (en) * 1987-03-20 1988-09-26 日産自動車株式会社 Cargo gear for industrial car
SE461391B (en) * 1987-10-28 1990-02-12 Bt Ind Ab HYDRAULIC LIFTING DEVICE
US5117166A (en) * 1991-03-28 1992-05-26 General Electric Company Chopper circuit for dynamic braking in an electric power conversion system
IT1254284B (en) * 1992-03-13 1995-09-14 Guido Palleggi ELECTRIC TRACTION SYSTEM IN FORKLIFTS
DE4317782C2 (en) * 1993-05-28 1996-01-18 Jungheinrich Ag Hydraulic lifting device for battery-powered industrial trucks or the like
DE4333706C1 (en) * 1993-10-02 1995-04-13 Jungheinrich Ag Hydraulic lifting appliance for battery-operated industrial trucks
IT1269440B (en) * 1994-01-19 1997-04-01 Fita Om Carrelli Elevatori S P ELECTRIC MOTORIZED FORKLIFT
DE4402653C2 (en) * 1994-01-29 1997-01-30 Jungheinrich Ag Hydraulic lifting device for battery-powered industrial trucks
GB9422561D0 (en) * 1994-11-09 1995-01-04 Funnell Nicholas J Variable speed electro/hydraulic drive system for animal exercises
AU2070797A (en) * 1996-03-08 1997-09-22 P And S Bolcerek's, Incorporated Efficient energy recapture system
JP3220637B2 (en) * 1996-03-21 2001-10-22 日興電機工業株式会社 Hydraulic power unit device
IT1283752B1 (en) * 1996-04-19 1998-04-30 Fiat Om Carrelli Elevatori LIFTING AND LOWERING SYSTEM OF THE LOAD SUPPORT OF AN ELECTRIC FORKLIFT.
JPH101978A (en) * 1996-06-13 1998-01-06 Yutani Heavy Ind Ltd Battery-driven working machine
DE69731256T2 (en) * 1996-06-19 2006-03-02 Kabushiki Kaisha Kobe Seiko Sho Also Known As Kobe Steel Ltd. Battery operated construction machine
IT1288416B1 (en) * 1996-09-13 1998-09-22 Fidimult Bv COMMAND AND CONTROL DEVICE, IN ENERGY RECOVERY, FOR THE DESCENT PHASE OF LIFTS OPERATING ELECTROHYDRAULIC OPERATION
JPH10152865A (en) * 1996-11-22 1998-06-09 Yutani Heavy Ind Ltd Battery driven working machine
DE19744429A1 (en) * 1997-10-08 1999-04-22 Still Wagner Gmbh & Co Kg Industrial truck with a load suspension device and method for lowering the load suspension device
JP3152200B2 (en) 1998-02-06 2001-04-03 株式会社豊田自動織機製作所 Solenoid valve control device for industrial vehicles
US6064162A (en) * 1998-04-27 2000-05-16 Square D Company Circuit for automatic operation of a series brake upon power loss during a regenerative braking period
DE19844795A1 (en) * 1998-09-30 2000-04-13 Bosch Gmbh Robert Electro-hydraulic device for speed control of a hydraulic lifting cylinder
JP2000136806A (en) * 1998-11-04 2000-05-16 Komatsu Ltd Pressure oil energy recovery equipment and pressure oil energy recovery/regeneration equipment
JP3782251B2 (en) * 1999-03-31 2006-06-07 株式会社神戸製鋼所 Work machine with battery
JP2001220099A (en) * 2000-02-08 2001-08-14 Mitsubishi Heavy Ind Ltd Vehicle having traveling mechanism and cargo handling mechanism
DE10005779B4 (en) * 2000-02-10 2007-06-14 Robert Bosch Gmbh Method for improving the start-up behavior of a device during the transition from pump to motor operation
DE10010670C2 (en) * 2000-03-04 2003-11-06 Jungheinrich Ag Hydraulic lifting device for battery-operated industrial trucks
US6860068B2 (en) * 2001-06-26 2005-03-01 John J. Halloran Potential energy storage system
DE10342436B3 (en) * 2003-09-11 2005-03-17 Jungheinrich Ag Pump unit for manual fork lift truck has three-stage control valve with three no-return valves and switching valve
US8083499B1 (en) * 2003-12-01 2011-12-27 QuaLift Corporation Regenerative hydraulic lift system
US7249457B2 (en) * 2005-02-18 2007-07-31 Timberjack Inc. Hydraulic gravitational load energy recuperation
US7770696B2 (en) * 2005-02-25 2010-08-10 Mitsubishi Heavy Industries, Ltd. Energy recovering system of hydraulic lift device for battery operated industrial trucks
EP1852387B1 (en) * 2005-02-25 2013-04-03 Mitsubishi Heavy Industries, Ltd. Load handling regeneration method and load handling regeneration system of battery type industrial vehicle
NL1031744C2 (en) * 2006-05-03 2007-11-06 Stertil Bv Lifting system.
DE102006029623A1 (en) * 2006-06-28 2008-01-03 Robert Bosch Gmbh Electrohydraulic system, as well as apparatus and method for actuating such
US7980073B2 (en) * 2008-05-08 2011-07-19 Caterpillar Inc. Hybrid system for a powertrain and hydraulic system
US8362629B2 (en) * 2010-03-23 2013-01-29 Bucyrus International Inc. Energy management system for heavy equipment
DE102010021822B3 (en) * 2010-05-28 2011-07-21 Kapelski, Rainer, 24401 Completely autonomous lashing platform
CN102108948B (en) * 2010-12-28 2012-11-28 山河智能装备股份有限公司 Renewable energy power generating system applicable to electrocar for loading, unloading and transporting
CN102603060B (en) * 2011-01-21 2013-07-03 孙建 Aeration boat
US11305972B1 (en) * 2011-11-11 2022-04-19 Vehcile Service Group, Llc Vehicle lift with locally stored energy source
JP5352663B2 (en) * 2011-12-26 2013-11-27 株式会社豊田自動織機 Hydraulic control device for forklift
EP2844506B1 (en) * 2012-05-01 2021-03-31 Carrier Corporation Transport refrigeration system having electric fans
JP5835249B2 (en) * 2013-02-27 2015-12-24 株式会社豊田自動織機 Hydraulic control device for forklift
CN104141644B (en) * 2013-05-10 2017-12-15 博世力士乐（常州）有限公司 The power unit of hydraulic oil pumping unit and corresponding hydraulic oil pumping unit
US10800275B2 (en) * 2018-01-12 2020-10-13 Ford Global Technologies, Llc Hybrid vehicle system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2014605A1 (en) * 1969-03-31 1971-03-04 Asea Ab Lifting device for forklifts
US3947744A (en) * 1974-10-21 1976-03-30 Allis-Chalmers Corporation Electric truck having elevated load potential energy recovery with means to adjust rate of carriage descent
DE2724383A1 (en) * 1977-05-28 1978-11-30 Jungheinrich Kg Forklift truck hydraulic lift operating system - uses fluid released on lowering to drive generator for power recovery
DE3018156A1 (en) * 1980-02-26 1981-09-03 Oil Drive Kogyo Ltd., Tokyo HYDRAULIC LIFTING DEVICE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512072A (en) * 1967-11-13 1970-05-12 Allis Chalmers Mfg Co Elevated load potential energy recovery in an electric truck
DE3048999A1 (en) * 1980-12-24 1982-07-15 Robert Bosch Gmbh, 7000 Stuttgart CIRCUIT ARRANGEMENT FOR ENERGY RECOVERY IN CHOPPER-CONTROLLED SERIES
DE3104549C2 (en) * 1981-02-10 1986-07-10 Jungheinrich Unternehmensverwaltung Kg, 2000 Hamburg Lifting device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2014605A1 (en) * 1969-03-31 1971-03-04 Asea Ab Lifting device for forklifts
US3947744A (en) * 1974-10-21 1976-03-30 Allis-Chalmers Corporation Electric truck having elevated load potential energy recovery with means to adjust rate of carriage descent
DE2724383A1 (en) * 1977-05-28 1978-11-30 Jungheinrich Kg Forklift truck hydraulic lift operating system - uses fluid released on lowering to drive generator for power recovery
DE3018156A1 (en) * 1980-02-26 1981-09-03 Oil Drive Kogyo Ltd., Tokyo HYDRAULIC LIFTING DEVICE

Also Published As

Publication number Publication date
DE3602510A1 (en) 1987-07-30
DE3602510C2 (en) 1989-03-02
DE3787292D1 (en) 1993-10-14
EP0230884B1 (en) 1993-09-08
ATE94149T1 (en) 1993-09-15
US4723107A (en) 1988-02-02
EP0230884A2 (en) 1987-08-05

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