JPS57134064A - Controller for hydraulic system - Google Patents

Controller for hydraulic system

Info

Publication number
JPS57134064A
JPS57134064A JP1906781A JP1906781A JPS57134064A JP S57134064 A JPS57134064 A JP S57134064A JP 1906781 A JP1906781 A JP 1906781A JP 1906781 A JP1906781 A JP 1906781A JP S57134064 A JPS57134064 A JP S57134064A
Authority
JP
Japan
Prior art keywords
neutral
valve
side pressure
servo valve
output side
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
JP1906781A
Other languages
Japanese (ja)
Other versions
JPS6151701B2 (en
Inventor
Yukio Aoyanagi
Eiki Izumi
Sotaro Tanaka
Takeshi Yamaguchi
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 JP1906781A priority Critical patent/JPS57134064A/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 JPS57134064A publication Critical patent/JPS57134064A/en
Publication of JPS6151701B2 publication Critical patent/JPS6151701B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4157—Control of braking, e.g. preventing pump over-speeding when motor acts as a pump
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements

Abstract

PURPOSE:To make a motor stopper work as soon as a hydraulic motor is stopped by leading output side pressure of a hydraulic servomechanism, which is provided with a reaction generation mechanism (a spring) of which load is lowered close to neutral, to the motor stopper. CONSTITUTION:When a control lever of a servo valve 10 is returned to neutral, suction side pressure of a hydraulic pump 1 quickly rises to work a control valve 11, so that the servo valve 10 stays in a switching condition since it cannot immediately follow the control lever returning to neutral condition. Therefore, output side pressure of the servo valve 10 is taken out by a shuttle valve 22 to operate a switching valve 14. And, when the hydraulic pump 1 is in neutral and a hydraulic motor 2 is practically stopped, the load given by a reaction generation mechanism (a spring) is lowered to bring down the output side pressure of the servo valve 10 and the switching valve 14 returns to the neutral condition and operates a brake 20.
JP1906781A 1980-12-27 1981-02-13 Controller for hydraulic system Granted JPS57134064A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1906781A JPS57134064A (en) 1981-02-13 1981-02-13 Controller for hydraulic system
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
JP1906781A JPS57134064A (en) 1981-02-13 1981-02-13 Controller for hydraulic system

Publications (2)

Publication Number Publication Date
JPS57134064A true JPS57134064A (en) 1982-08-19
JPS6151701B2 JPS6151701B2 (en) 1986-11-10

Family

ID=11989078

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1906781A Granted JPS57134064A (en) 1980-12-27 1981-02-13 Controller for hydraulic system

Country Status (1)

Country Link
JP (1) JPS57134064A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419132A (en) * 1992-07-14 1995-05-30 Hitachi Construction Machinery Co., Ltd. Inertial body drive mechanism
US5862665A (en) * 1994-12-08 1999-01-26 Komatsu Ltd. Apparatus for preventing reverse rotation for hydraulic actuator
US5938224A (en) * 1996-04-08 1999-08-17 Brackett; Douglas C. Hydraulic bicycle with conjugate drive motors and variable stroke crankshaft

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016231A (en) * 1973-06-20 1975-02-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5016231A (en) * 1973-06-20 1975-02-20

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419132A (en) * 1992-07-14 1995-05-30 Hitachi Construction Machinery Co., Ltd. Inertial body drive mechanism
US5862665A (en) * 1994-12-08 1999-01-26 Komatsu Ltd. Apparatus for preventing reverse rotation for hydraulic actuator
US5938224A (en) * 1996-04-08 1999-08-17 Brackett; Douglas C. Hydraulic bicycle with conjugate drive motors and variable stroke crankshaft

Also Published As

Publication number Publication date
JPS6151701B2 (en) 1986-11-10

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