JPS5757903A - Fluid circuit - Google Patents

Fluid circuit

Info

Publication number
JPS5757903A
JPS5757903A JP55131895A JP13189580A JPS5757903A JP S5757903 A JPS5757903 A JP S5757903A JP 55131895 A JP55131895 A JP 55131895A JP 13189580 A JP13189580 A JP 13189580A JP S5757903 A JPS5757903 A JP S5757903A
Authority
JP
Japan
Prior art keywords
flow direction
load pressure
actuators
pressure
control valves
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
JP55131895A
Other languages
Japanese (ja)
Other versions
JPS642801B2 (en
Inventor
Kenji Masuda
Toshio Ikeda
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Daikin Kogyo 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 Daikin Industries Ltd, Daikin Kogyo Co Ltd filed Critical Daikin Industries Ltd
Priority to JP55131895A priority Critical patent/JPS5757903A/en
Publication of JPS5757903A publication Critical patent/JPS5757903A/en
Publication of JPS642801B2 publication Critical patent/JPS642801B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To operate a machine in its optimum state used in a cargo-handling machine of oil hydraulic shovel and crane or the like, by correctly performing speed control for a plurality of actuators without being affected by other load pressure.
CONSTITUTION: A spring chamber of a pressure reducing pressure compensating valve 36 and load pressure sensing port of the second flow direction control valves 38a, 38b are connected to a spring chamber of a power match valve 81a through a shuttle valve 52. In this way, when load pressure of the second flow direction contr ol valves 37a, 37b is higher than load pressure of the second flow direction control valves 38a, 38b, a large amount of fluid to the second actuators 25, 26 and small amount of fluid to the first actuators 28, 30 are supplied, while in a reverse case, the first and second flow direction control valves 37a, 37b, 38, 38b are pressure compensated altogether, thus workability and safety can be improved.
COPYRIGHT: (C)1982,JPO&Japio
JP55131895A 1980-09-22 1980-09-22 Fluid circuit Granted JPS5757903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55131895A JPS5757903A (en) 1980-09-22 1980-09-22 Fluid circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55131895A JPS5757903A (en) 1980-09-22 1980-09-22 Fluid circuit

Publications (2)

Publication Number Publication Date
JPS5757903A true JPS5757903A (en) 1982-04-07
JPS642801B2 JPS642801B2 (en) 1989-01-18

Family

ID=15068659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55131895A Granted JPS5757903A (en) 1980-09-22 1980-09-22 Fluid circuit

Country Status (1)

Country Link
JP (1) JPS5757903A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013217A1 (en) * 1990-02-28 1991-09-05 Hitachi Construction Machinery Co., Ltd. Hydraulic drive system in construction machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5257478A (en) * 1975-11-05 1977-05-11 Daikin Ind Ltd Fluid equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5257478A (en) * 1975-11-05 1977-05-11 Daikin Ind Ltd Fluid equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013217A1 (en) * 1990-02-28 1991-09-05 Hitachi Construction Machinery Co., Ltd. Hydraulic drive system in construction machine

Also Published As

Publication number Publication date
JPS642801B2 (en) 1989-01-18

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