JPS57110857A - Controller of oil hydraulic device - Google Patents

Controller of oil hydraulic device

Info

Publication number
JPS57110857A
JPS57110857A JP18713280A JP18713280A JPS57110857A JP S57110857 A JPS57110857 A JP S57110857A JP 18713280 A JP18713280 A JP 18713280A JP 18713280 A JP18713280 A JP 18713280A JP S57110857 A JPS57110857 A JP S57110857A
Authority
JP
Japan
Prior art keywords
valve
oil hydraulic
servo
servo valve
neutral
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
JP18713280A
Other languages
Japanese (ja)
Other versions
JPS6314231B2 (en
Inventor
Yukio Aoyanagi
Eiki Izumi
Takeshi Yamaguchi
Sotaro Tanaka
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 JP18713280A priority Critical patent/JPS57110857A/en
Priority to DE8181110687T priority patent/DE3171629D1/en
Priority to EP19810110687 priority patent/EP0056865B1/en
Priority to US06/333,555 priority patent/US4571941A/en
Publication of JPS57110857A publication Critical patent/JPS57110857A/en
Publication of JPS6314231B2 publication Critical patent/JPS6314231B2/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°
    • E02F9/123—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
    • E02F9/08—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
    • E02F9/20—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)

Abstract

PURPOSE: To rapidly operate motor stopping means, by providing pressure transmitting means for controlling the motor stopping means respectively in accordance with output side pressureof a servo valve and in relation to operation of input means of an oil hydraulic servo mechanism.
CONSTITUTION: When a control lever of a servo valve 10 is returned to its neutral position, a selector valve 13, operated interlocking to the servo valve, is also returned to its neutral position, and a pipe line to a brake device 20 is communicated to a tank. However, at this time pressure at the suction side of an oil hydraulic pump 1 rapidly rises to operate a control valve 11, then the servo valve 10 can not be reset immediately to its neutral state and remains in a state of selecting position. Here output side pressure of the servo valve 10 is taken out from a shuttle valve 22, and this causes a selector valve 14 to operate. Accordingly, when an oil hydraulic motor 2 is substantially in a stopping state, the selector valve 14 is reset to the neutral, and the selector valve 13 is also in neutral position, thus the brake device 20 can be operated.
COPYRIGHT: (C)1982,JPO&Japio
JP18713280A 1980-12-27 1980-12-27 Controller of oil hydraulic device Granted JPS57110857A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP18713280A JPS57110857A (en) 1980-12-27 1980-12-27 Controller of oil hydraulic device
DE8181110687T DE3171629D1 (en) 1980-12-27 1981-12-22 Hydraulic power 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

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18713280A JPS57110857A (en) 1980-12-27 1980-12-27 Controller of oil hydraulic device

Publications (2)

Publication Number Publication Date
JPS57110857A true JPS57110857A (en) 1982-07-09
JPS6314231B2 JPS6314231B2 (en) 1988-03-30

Family

ID=16200678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18713280A Granted JPS57110857A (en) 1980-12-27 1980-12-27 Controller of oil hydraulic device

Country Status (1)

Country Link
JP (1) JPS57110857A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6050091A (en) * 1996-03-27 2000-04-18 Komatsu Ltd. Brake device for oil hydraulic motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6050091A (en) * 1996-03-27 2000-04-18 Komatsu Ltd. Brake device for oil hydraulic motor

Also Published As

Publication number Publication date
JPS6314231B2 (en) 1988-03-30

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