JPS56109904A - Hydraulic control circuit for hydraulic cylinder - Google Patents

Hydraulic control circuit for hydraulic cylinder

Info

Publication number
JPS56109904A
JPS56109904A JP938180A JP938180A JPS56109904A JP S56109904 A JPS56109904 A JP S56109904A JP 938180 A JP938180 A JP 938180A JP 938180 A JP938180 A JP 938180A JP S56109904 A JPS56109904 A JP S56109904A
Authority
JP
Japan
Prior art keywords
valve
direction control
oil
flow distributing
branched pipes
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
JP938180A
Other languages
Japanese (ja)
Inventor
Yoshio Shimizu
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 JP938180A priority Critical patent/JPS56109904A/en
Publication of JPS56109904A publication Critical patent/JPS56109904A/en
Pending legal-status Critical Current

Links

Landscapes

  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To control the extending and retraction of at least four hydraulic cylinders accurately in synchronization without relation to the change in load pressure and the oil temperature in the apparatus for hoisting and lowering the heavy materials such as a turning body and the like of a crane truck by controlling the extension and retraction of said hydraulic cylinders.
CONSTITUTION: Between a main direction control valve 8 in an extending-side driving circuit 11 for four jack cylinders 6aW6d and the first and second direction control valves 14 and 15, is provided the first flow distributing and collecting valve 21 which combines the returning oil from front and rear pipes 12 and 13 to the driving circuit 11. Between said valve 21 and the first direction control valve 14, is provided the second flow distributing and combining valve 22 which distributes the oil in the front pipe 12 to branched pipes 12a and 12b are combines the returning oil from the branched pipes 12a and 12b to the front pipe 12. Furthermore, between the valve 21 and the second direction control valve 15, is provided the third flow distributing and combining valve 23 for branched pipes 13c and 13d for the similar function.
COPYRIGHT: (C)1981,JPO&Japio
JP938180A 1980-01-31 1980-01-31 Hydraulic control circuit for hydraulic cylinder Pending JPS56109904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP938180A JPS56109904A (en) 1980-01-31 1980-01-31 Hydraulic control circuit for hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP938180A JPS56109904A (en) 1980-01-31 1980-01-31 Hydraulic control circuit for hydraulic cylinder

Publications (1)

Publication Number Publication Date
JPS56109904A true JPS56109904A (en) 1981-08-31

Family

ID=11718868

Family Applications (1)

Application Number Title Priority Date Filing Date
JP938180A Pending JPS56109904A (en) 1980-01-31 1980-01-31 Hydraulic control circuit for hydraulic cylinder

Country Status (1)

Country Link
JP (1) JPS56109904A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61103003A (en) * 1984-10-24 1986-05-21 Hitachi Constr Mach Co Ltd Control circuit of hydraulic cylinder
CN102287411A (en) * 2011-09-23 2011-12-21 徐州重型机械有限公司 Hydraulic control valve, dual-cylinder stretching system and high-altitude job engineering machine
CN102518837A (en) * 2012-01-06 2012-06-27 徐州重型机械有限公司 High-precision flow distributing and collecting valve and crane
CN102582425A (en) * 2011-12-20 2012-07-18 徐州重型机械有限公司 Walking hydraulic control system and self-walking type engineering machinery utilizing same
CN104500465A (en) * 2014-11-28 2015-04-08 宁波中意液压马达有限公司 Hydraulic chassis driving system of multifunctional agricultural locomotive

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61103003A (en) * 1984-10-24 1986-05-21 Hitachi Constr Mach Co Ltd Control circuit of hydraulic cylinder
CN102287411A (en) * 2011-09-23 2011-12-21 徐州重型机械有限公司 Hydraulic control valve, dual-cylinder stretching system and high-altitude job engineering machine
CN102582425A (en) * 2011-12-20 2012-07-18 徐州重型机械有限公司 Walking hydraulic control system and self-walking type engineering machinery utilizing same
CN102582425B (en) * 2011-12-20 2015-06-17 徐州重型机械有限公司 Walking hydraulic control system and self-walking type engineering machinery utilizing same
CN102518837A (en) * 2012-01-06 2012-06-27 徐州重型机械有限公司 High-precision flow distributing and collecting valve and crane
CN104500465A (en) * 2014-11-28 2015-04-08 宁波中意液压马达有限公司 Hydraulic chassis driving system of multifunctional agricultural locomotive
CN104500465B (en) * 2014-11-28 2017-01-04 宁波中意液压马达有限公司 Multifunctional agricultural locomotive fluid pressure underpan drive system

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