JPS57110859A - Controller of oil hydraulic system - Google Patents

Controller of oil hydraulic system

Info

Publication number
JPS57110859A
JPS57110859A JP18713480A JP18713480A JPS57110859A JP S57110859 A JPS57110859 A JP S57110859A JP 18713480 A JP18713480 A JP 18713480A JP 18713480 A JP18713480 A JP 18713480A JP S57110859 A JPS57110859 A JP S57110859A
Authority
JP
Japan
Prior art keywords
oil hydraulic
neutral position
valve
servo valve
servo
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
JP18713480A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6255024B2 (enrdf_load_stackoverflow
Inventor
Takeshi Yamaguchi
Sotaro Tanaka
Eiki Izumi
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 JP18713480A priority Critical patent/JPS57110859A/ja
Priority to EP19810110687 priority patent/EP0056865B1/en
Priority to US06/333,555 priority patent/US4571941A/en
Priority to DE8181110687T priority patent/DE3171629D1/de
Publication of JPS57110859A publication Critical patent/JPS57110859A/ja
Publication of JPS6255024B2 publication Critical patent/JPS6255024B2/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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/128—Braking systems
    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/123—Drives or control devices specially adapted therefor
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)
JP18713480A 1980-12-27 1980-12-27 Controller of oil hydraulic system Granted JPS57110859A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP18713480A JPS57110859A (en) 1980-12-27 1980-12-27 Controller of oil hydraulic system
EP19810110687 EP0056865B1 (en) 1980-12-27 1981-12-22 Hydraulic power system
US06/333,555 US4571941A (en) 1980-12-27 1981-12-22 Hydraulic power system
DE8181110687T DE3171629D1 (en) 1980-12-27 1981-12-22 Hydraulic power system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18713480A JPS57110859A (en) 1980-12-27 1980-12-27 Controller of oil hydraulic system

Publications (2)

Publication Number Publication Date
JPS57110859A true JPS57110859A (en) 1982-07-09
JPS6255024B2 JPS6255024B2 (enrdf_load_stackoverflow) 1987-11-18

Family

ID=16200710

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18713480A Granted JPS57110859A (en) 1980-12-27 1980-12-27 Controller of oil hydraulic system

Country Status (1)

Country Link
JP (1) JPS57110859A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01255702A (ja) * 1988-04-01 1989-10-12 Hitachi Constr Mach Co Ltd 油圧モータのブレーキ回路
JP2019007586A (ja) * 2017-06-27 2019-01-17 川崎重工業株式会社 油圧駆動システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01255702A (ja) * 1988-04-01 1989-10-12 Hitachi Constr Mach Co Ltd 油圧モータのブレーキ回路
JP2019007586A (ja) * 2017-06-27 2019-01-17 川崎重工業株式会社 油圧駆動システム

Also Published As

Publication number Publication date
JPS6255024B2 (enrdf_load_stackoverflow) 1987-11-18

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