SE9901408L - Apparatus for, and method of, movement of load carriers of industrial trucks - Google Patents

Apparatus for, and method of, movement of load carriers of industrial trucks

Info

Publication number
SE9901408L
SE9901408L SE9901408A SE9901408A SE9901408L SE 9901408 L SE9901408 L SE 9901408L SE 9901408 A SE9901408 A SE 9901408A SE 9901408 A SE9901408 A SE 9901408A SE 9901408 L SE9901408 L SE 9901408L
Authority
SE
Sweden
Prior art keywords
movement
pivot
proportional
valve
controlled
Prior art date
Application number
SE9901408A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9901408D0 (en
SE512652C2 (en
Inventor
Bengt Joelsson
Original Assignee
Bt Ind Ab
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 Bt Ind Ab filed Critical Bt Ind Ab
Priority to SE9901408A priority Critical patent/SE9901408L/en
Publication of SE9901408D0 publication Critical patent/SE9901408D0/en
Publication of SE512652C2 publication Critical patent/SE512652C2/en
Publication of SE9901408L publication Critical patent/SE9901408L/en
Priority to EP00850068A priority patent/EP1046610A3/en

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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure

Landscapes

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

Abstract

Device and method for movement of load carrying means of an industrial truck, in particular the pivot and lateral movement of a swing reach fork means. Hydraulic consumers (30, 32) provide the movements. A proportional valve (38, 40) is arranged in front each hydraulic consumer. The proportional flow valve (40) of the pivot movement has its inlet (58) connected to the outlet (56) of the other. At lateral movement the motor speed is controlled and the proportional flow valve (38) is held open. At pivot movement or simultaneous movement of both the motor speed is set so that the total flow somewhat surpasses a maximum value at the same time as the proportional flow valves (38, 40) are controlled to desired primary flow. <IMAGE>
SE9901408A 1999-04-20 1999-04-20 Apparatus for, and method of, movement of load carriers of industrial trucks SE9901408L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9901408A SE9901408L (en) 1999-04-20 1999-04-20 Apparatus for, and method of, movement of load carriers of industrial trucks
EP00850068A EP1046610A3 (en) 1999-04-20 2000-04-18 Device and method for movement of a load carrier at an industrial truck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9901408A SE9901408L (en) 1999-04-20 1999-04-20 Apparatus for, and method of, movement of load carriers of industrial trucks

Publications (3)

Publication Number Publication Date
SE9901408D0 SE9901408D0 (en) 1999-04-20
SE512652C2 SE512652C2 (en) 2000-04-17
SE9901408L true SE9901408L (en) 2000-04-17

Family

ID=20415284

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9901408A SE9901408L (en) 1999-04-20 1999-04-20 Apparatus for, and method of, movement of load carriers of industrial trucks

Country Status (2)

Country Link
EP (1) EP1046610A3 (en)
SE (1) SE9901408L (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042881A1 (en) * 2004-09-04 2006-03-09 Jungheinrich Aktiengesellschaft Device for emergency lowering of a load-bearing means in a forklift
JP5352663B2 (en) * 2011-12-26 2013-11-27 株式会社豊田自動織機 Hydraulic control device for forklift
AT514115B1 (en) * 2013-04-09 2015-05-15 Ttcontrol Gmbh Electrohydraulic control circuit
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
EP2829504A1 (en) * 2013-07-23 2015-01-28 Palfinger Platforms GmbH Method for controlling a working machine and hydraulic system for a lifting work platform

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911942A (en) * 1974-03-28 1975-10-14 Gen Signal Corp Compensated multifunction hydraulic system
DE3145525A1 (en) * 1981-11-17 1983-05-26 Robert Bosch Gmbh, 7000 Stuttgart PRESSURE CONTROL DEVICE
DE29802498U1 (en) * 1998-02-13 1998-04-16 Heilmeier & Weinlein Forklift control

Also Published As

Publication number Publication date
SE9901408D0 (en) 1999-04-20
SE512652C2 (en) 2000-04-17
EP1046610A3 (en) 2005-11-30
EP1046610A2 (en) 2000-10-25

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Legal Events

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