JPS6421127A - Control on speed for front member of hydraulic shovel - Google Patents

Control on speed for front member of hydraulic shovel

Info

Publication number
JPS6421127A
JPS6421127A JP13123387A JP13123387A JPS6421127A JP S6421127 A JPS6421127 A JP S6421127A JP 13123387 A JP13123387 A JP 13123387A JP 13123387 A JP13123387 A JP 13123387A JP S6421127 A JPS6421127 A JP S6421127A
Authority
JP
Japan
Prior art keywords
controller
control
signal
speed
arm
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
JP13123387A
Other languages
Japanese (ja)
Other versions
JPH036286B2 (en
Inventor
Eiki Izumi
Katsuro Abe
Hiroshi Watanabe
Yukio Aoyanagi
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP13123387A priority Critical patent/JPS6421127A/en
Publication of JPS6421127A publication Critical patent/JPS6421127A/en
Publication of JPH036286B2 publication Critical patent/JPH036286B2/ja
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

PURPOSE:To prevent the occurrence of collision with the stroke end by a method in which a conversion signal obtained from conversion with a function becoming zero when arm angle signal is max. or min. is multiplied with output signal of an operating lever to obtain a control signal to control the flow rate of pressure oil. CONSTITUTION:A speed controller for a front member consists of a variable discharge pump 10, the discharge controller 17 of a pump 10, an angle sensor 18 of arm 3, an arm operating lever 19, and a controller 20. For the controller 20, a function generator to convert arm angle signals by a function of becoming zero when arm angle signal is max. or min. is provided. A control signal is obtained from the product of output signal of the function generator and the output signal of the lever 19 to control the controller 17. On the stroke end of the hydraulic cylinder, the speed of the hydraulic cylinder is zeroed to prevent the occurrence of collision with the stroke end of the hydraulic cylinder.
JP13123387A 1987-05-29 1987-05-29 Control on speed for front member of hydraulic shovel Granted JPS6421127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13123387A JPS6421127A (en) 1987-05-29 1987-05-29 Control on speed for front member of hydraulic shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13123387A JPS6421127A (en) 1987-05-29 1987-05-29 Control on speed for front member of hydraulic shovel

Publications (2)

Publication Number Publication Date
JPS6421127A true JPS6421127A (en) 1989-01-24
JPH036286B2 JPH036286B2 (en) 1991-01-29

Family

ID=15053126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13123387A Granted JPS6421127A (en) 1987-05-29 1987-05-29 Control on speed for front member of hydraulic shovel

Country Status (1)

Country Link
JP (1) JPS6421127A (en)

Also Published As

Publication number Publication date
JPH036286B2 (en) 1991-01-29

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