JPS54129271A - Hydraulic circuit - Google Patents

Hydraulic circuit

Info

Publication number
JPS54129271A
JPS54129271A JP3542278A JP3542278A JPS54129271A JP S54129271 A JPS54129271 A JP S54129271A JP 3542278 A JP3542278 A JP 3542278A JP 3542278 A JP3542278 A JP 3542278A JP S54129271 A JPS54129271 A JP S54129271A
Authority
JP
Japan
Prior art keywords
hydraulic
actuator
hydraulic motor
pressure
circuit
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
JP3542278A
Other languages
Japanese (ja)
Other versions
JPS5831484B2 (en
Inventor
Shuichi Ichiyama
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 JP3542278A priority Critical patent/JPS5831484B2/en
Publication of JPS54129271A publication Critical patent/JPS54129271A/en
Publication of JPS5831484B2 publication Critical patent/JPS5831484B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To attain smoothed simultaneous operations of a hydraulic motor and other actuators in a hydraulic circuit by constituting the hydraulic circuit such that hydraulic cylinders adapted to raise and reduce the hydraulic pressure are provided between a direction change-over valve of a hydraulic motor circuit and other actuators.
CONSTITUTION: If a switch 22 is closed, pressure on the head side of an actuator 9 is raised. Then, if another switch 21 is closed, change-over valves 15, 16 are changed over to their left position. At this time, a hydraulic motor 8 and the actuator 9 effects a composite operation. When a change-over valve 13b is restored to its neutral position to brake the hydraulic motor 8, if the pressure of the actuator 9 is lower than the brake pressure of the hydraulic motor 8, pressure oil discharged from the hydraulic motor 8 flows into a rod chamber of a hydraulic cylinder 7 to actuate the rod to thereby supply pressure oil in the hydraulic cylinder into the actuator by way of a check valve 19. Thus, the amount of actuation of the actuator 8 is increased and besides there is not loss of energy.
COPYRIGHT: (C)1979,JPO&Japio
JP3542278A 1978-03-29 1978-03-29 hydraulic circuit Expired JPS5831484B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3542278A JPS5831484B2 (en) 1978-03-29 1978-03-29 hydraulic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3542278A JPS5831484B2 (en) 1978-03-29 1978-03-29 hydraulic circuit

Publications (2)

Publication Number Publication Date
JPS54129271A true JPS54129271A (en) 1979-10-06
JPS5831484B2 JPS5831484B2 (en) 1983-07-06

Family

ID=12441428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3542278A Expired JPS5831484B2 (en) 1978-03-29 1978-03-29 hydraulic circuit

Country Status (1)

Country Link
JP (1) JPS5831484B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103711737A (en) * 2013-12-17 2014-04-09 天津大学 Structure for controlling hydraulic lift shifting process and state of large-scale structures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103711737A (en) * 2013-12-17 2014-04-09 天津大学 Structure for controlling hydraulic lift shifting process and state of large-scale structures

Also Published As

Publication number Publication date
JPS5831484B2 (en) 1983-07-06

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