JPS57173657A - Inertial mass driving oil pressure closed circuit - Google Patents

Inertial mass driving oil pressure closed circuit

Info

Publication number
JPS57173657A
JPS57173657A JP5702581A JP5702581A JPS57173657A JP S57173657 A JPS57173657 A JP S57173657A JP 5702581 A JP5702581 A JP 5702581A JP 5702581 A JP5702581 A JP 5702581A JP S57173657 A JPS57173657 A JP S57173657A
Authority
JP
Japan
Prior art keywords
pressure
valve
main circuit
switching
changing mechanism
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.)
Pending
Application number
JP5702581A
Other languages
Japanese (ja)
Inventor
Morio Oshina
Takashi Kanai
Masami Ochiai
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 JP5702581A priority Critical patent/JPS57173657A/en
Publication of JPS57173657A publication Critical patent/JPS57173657A/en
Pending 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

PURPOSE:To control both the speed and acceleration by controlling the operation speed of a squeeze volume changing mechanism in such a manner that the pressure of a main circuit is below a set value and retaining the position of the squeeze volume changing mechanism when an operation signal is restored to a reference level. CONSTITUTION:When an operation lever 1 is turned in the direction of A, a servo-valve 24 is located at a switching position (d), and a switching valve 34 is located at a switching position (i). Whereupon, the position of a squeeze volume changing mechanism 6 is moved to raise the pressure of a main circuit 5A. When the pressure of the main circuit 5A amounts to a set pressure of a control valve 33, the control valve 33 is transferred from a return position (l) to a switching position (m), so as to lower the pressure of the main circuit 5A. When the operation lever 1 is turned to a neutral position, oil in a left oil chamber 13A of a controlling actuator 7 is blocked by a check valve 1 located at the switching position (i) of the switching valve 34 to retain the position of the squeeze volume changing mechanism 6, whereby a hydraulic motor 2 continues to rotate at a fixed speed.
JP5702581A 1981-04-17 1981-04-17 Inertial mass driving oil pressure closed circuit Pending JPS57173657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5702581A JPS57173657A (en) 1981-04-17 1981-04-17 Inertial mass driving oil pressure closed circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5702581A JPS57173657A (en) 1981-04-17 1981-04-17 Inertial mass driving oil pressure closed circuit

Publications (1)

Publication Number Publication Date
JPS57173657A true JPS57173657A (en) 1982-10-26

Family

ID=13043885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5702581A Pending JPS57173657A (en) 1981-04-17 1981-04-17 Inertial mass driving oil pressure closed circuit

Country Status (1)

Country Link
JP (1) JPS57173657A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6215135A (en) * 1985-07-15 1987-01-23 Yanmar Diesel Engine Co Ltd Hydraulic drive tractor
JPS6215133A (en) * 1985-07-15 1987-01-23 Yanmar Diesel Engine Co Ltd Hydraulic drive tractor
JPS63214562A (en) * 1987-02-27 1988-09-07 Kayaba Ind Co Ltd Hydraulic drive circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6215135A (en) * 1985-07-15 1987-01-23 Yanmar Diesel Engine Co Ltd Hydraulic drive tractor
JPS6215133A (en) * 1985-07-15 1987-01-23 Yanmar Diesel Engine Co Ltd Hydraulic drive tractor
JPS63214562A (en) * 1987-02-27 1988-09-07 Kayaba Ind Co Ltd Hydraulic drive circuit

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