JPS5487355A - Method of controlling variable capacity oil hydraulic motor in service machine - Google Patents

Method of controlling variable capacity oil hydraulic motor in service machine

Info

Publication number
JPS5487355A
JPS5487355A JP15452477A JP15452477A JPS5487355A JP S5487355 A JPS5487355 A JP S5487355A JP 15452477 A JP15452477 A JP 15452477A JP 15452477 A JP15452477 A JP 15452477A JP S5487355 A JPS5487355 A JP S5487355A
Authority
JP
Japan
Prior art keywords
oil hydraulic
piston
capacity oil
spring
pump
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
JP15452477A
Other languages
Japanese (ja)
Other versions
JPS6038586B2 (en
Inventor
Makoto Ishii
Takafumi Inoue
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.)
Ebara Corp
Original Assignee
Ebara Corp
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 Ebara Corp filed Critical Ebara Corp
Priority to JP52154524A priority Critical patent/JPS6038586B2/en
Publication of JPS5487355A publication Critical patent/JPS5487355A/en
Publication of JPS6038586B2 publication Critical patent/JPS6038586B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

PURPOSE: To prevent overloading of the service machine with the input horsepowder to all oil hydraulic motors made constant by causing the operating force of a constant capacity oil hydraulic motor to act upon a piston section and reducing the average value of the operating pressures of variable capacity oil hydraulic motors.
CONSTITUTION: A servo-valve 8 is provided with a first chamber 12 for receiving the discharge pressure of a pump P1 and a second chamber 13 for receiving the discharge pressure of a pump P2, and the return pressure of the pump P3 is coupled through a line 11 to a chamber 18 between lands 15 and 16 of a piston 14, with lines 6 and 7 opened and closed by the respective lands 15 and 16. On the left side of the piston 14 a spring support 19 is provided to support a spring 21, with the other end thereof supported by a spring support 20 interlocked to the piston. Thus, a piston 22 assumes a position determined by a spring 23 and the discharge pressure from a pump P3, and the set pressure of the spring 21 is changed by the operating pressure of a constant capacity oil hydraulic motor C3 to vary angles of variable capacity oil hydraulic motors V1 and V2 with a servo-valve 3.
COPYRIGHT: (C)1979,JPO&Japio
JP52154524A 1977-12-23 1977-12-23 Control method for variable displacement hydraulic motor in work equipment Expired JPS6038586B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52154524A JPS6038586B2 (en) 1977-12-23 1977-12-23 Control method for variable displacement hydraulic motor in work equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52154524A JPS6038586B2 (en) 1977-12-23 1977-12-23 Control method for variable displacement hydraulic motor in work equipment

Publications (2)

Publication Number Publication Date
JPS5487355A true JPS5487355A (en) 1979-07-11
JPS6038586B2 JPS6038586B2 (en) 1985-09-02

Family

ID=15586133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52154524A Expired JPS6038586B2 (en) 1977-12-23 1977-12-23 Control method for variable displacement hydraulic motor in work equipment

Country Status (1)

Country Link
JP (1) JPS6038586B2 (en)

Also Published As

Publication number Publication date
JPS6038586B2 (en) 1985-09-02

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