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EP1193211A3 - Hydraulic lifting device - Google Patents

Hydraulic lifting device Download PDF

Info

Publication number
EP1193211A3
EP1193211A3 EP01122968A EP01122968A EP1193211A3 EP 1193211 A3 EP1193211 A3 EP 1193211A3 EP 01122968 A EP01122968 A EP 01122968A EP 01122968 A EP01122968 A EP 01122968A EP 1193211 A3 EP1193211 A3 EP 1193211A3
Authority
EP
European Patent Office
Prior art keywords
lifting device
lowering
hydraulic lifting
valve
pressurized medium
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
EP01122968A
Other languages
German (de)
French (fr)
Other versions
EP1193211A2 (en
EP1193211B1 (en
Inventor
Ralf Mebert
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
Application filed by Still Wagner GmbH and Co KG filed Critical Still Wagner GmbH and Co KG
Publication of EP1193211A2 publication Critical patent/EP1193211A2/en
Publication of EP1193211A3 publication Critical patent/EP1193211A3/en
Application granted granted Critical
Publication of EP1193211B1 publication Critical patent/EP1193211B1/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
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
    • 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
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40553—Flow control characterised by the type of flow control means or valve with pressure compensating valves
    • F15B2211/40569—Flow control characterised by the type of flow control means or valve with pressure compensating valves the pressure compensating valve arranged downstream of the flow control means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Landscapes

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

Abstract

The lifting device includes hydraulic lift cylinders (7) connected by a pressurized medium line to a hydraulic assembly. A branch line (15) branches off from the pressurized medium line (6) to a container (5). A lowering valve (16) for controlling the lowering movement in the fine control range is mounted in the branch line. the lowering valve can be a proportional valve. The electric motor can be an asynchronous motor or direct current motor.
EP01122968A 2000-09-28 2001-09-25 Hydraulic lifting device Expired - Lifetime EP1193211B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10048215 2000-09-28
DE10048215A DE10048215A1 (en) 2000-09-28 2000-09-28 Hydraulic lifting device

Publications (3)

Publication Number Publication Date
EP1193211A2 EP1193211A2 (en) 2002-04-03
EP1193211A3 true EP1193211A3 (en) 2005-12-14
EP1193211B1 EP1193211B1 (en) 2007-01-24

Family

ID=7658041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01122968A Expired - Lifetime EP1193211B1 (en) 2000-09-28 2001-09-25 Hydraulic lifting device

Country Status (3)

Country Link
EP (1) EP1193211B1 (en)
AT (1) ATE352515T1 (en)
DE (2) DE10048215A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
SE525159C2 (en) * 2002-06-05 2004-12-14 Bt Ind Ab Procedure for controlling the lowering movement of a truck's air cylinder
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
RU2016136705A (en) 2011-02-16 2018-12-11 Краун Эквайпмент Корпорейшн LOADING AND UNLOADING VEHICLE CALCULATING THE SPEED OF THE MOBILE UNIT BY THE SPEED OF THE ENGINE OF THE LIFTING MECHANISM
US9360023B2 (en) 2013-03-14 2016-06-07 The Raymond Corporation Hydraulic regeneration system and method for a material handling vehicle
JP6613233B2 (en) 2013-06-26 2019-11-27 パーカー ハニフィン マニュファクチャリング リミテッド Energy efficient electric vehicle control system
EP3178778B1 (en) 2015-12-10 2019-05-22 UniCarriers Europe AB Hydraulic system for energy regeneration and industrial truck with said hydraulic system
CA2992079A1 (en) 2017-01-17 2018-07-17 The Raymond Corporation Variable hydraulic pressure relief systems and methods for a material handling vehicle
CA2998893A1 (en) * 2017-03-23 2018-09-23 The Raymond Corporation Systems and methods for mast stabilization on a material handling vehicle
DE102019111295A1 (en) * 2019-05-02 2020-11-05 Jungheinrich Aktiengesellschaft Hydraulic arrangement for an industrial truck
JP7595636B2 (en) * 2019-07-08 2024-12-06 ダンフォス アクチ－セルスカブ Hydraulic system construction and bidirectional proportional valve usable within the system construction
CN112607673A (en) * 2020-12-24 2021-04-06 杭叉集团股份有限公司 Hydraulic oil way for lifting and potential energy recovery of portal frame of electric empty-box forklift

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018156A1 (en) * 1980-02-26 1981-09-03 Oil Drive Kogyo Ltd., Tokyo HYDRAULIC LIFTING DEVICE
EP0630853A1 (en) * 1993-05-28 1994-12-28 Jungheinrich Aktiengesellschaft Hydraulic lifting equipment for battery-propelled handling 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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018156A1 (en) * 1980-02-26 1981-09-03 Oil Drive Kogyo Ltd., Tokyo HYDRAULIC LIFTING DEVICE
EP0630853A1 (en) * 1993-05-28 1994-12-28 Jungheinrich Aktiengesellschaft Hydraulic lifting equipment for battery-propelled handling 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

Also Published As

Publication number Publication date
EP1193211A2 (en) 2002-04-03
ATE352515T1 (en) 2007-02-15
EP1193211B1 (en) 2007-01-24
DE50111941D1 (en) 2007-03-15
DE10048215A1 (en) 2002-04-11

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