JPS6455402A - Shock preventer for hydraulic motor drive circuit having counter balance valve - Google Patents

Shock preventer for hydraulic motor drive circuit having counter balance valve

Info

Publication number
JPS6455402A
JPS6455402A JP20954487A JP20954487A JPS6455402A JP S6455402 A JPS6455402 A JP S6455402A JP 20954487 A JP20954487 A JP 20954487A JP 20954487 A JP20954487 A JP 20954487A JP S6455402 A JPS6455402 A JP S6455402A
Authority
JP
Japan
Prior art keywords
valve
counter balance
balance valve
pressure
bleed
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
JP20954487A
Other languages
Japanese (ja)
Inventor
Takeaki Nozaki
Tokuichi Umemoto
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.)
Yanmar Co Ltd
Original Assignee
Yanmar Diesel Engine 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 Yanmar Diesel Engine Co Ltd filed Critical Yanmar Diesel Engine Co Ltd
Priority to JP20954487A priority Critical patent/JPS6455402A/en
Publication of JPS6455402A publication Critical patent/JPS6455402A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To reduce starting and stopping shock by coupling both main paths through a bleed-off valve which employs hydraulic pressure in main path as pilot pressure. CONSTITUTION:Main paths 1, 2 for communicating a counter balance valve 13 and a changeover valve 5 are coupled through a bleed-off valve 21 which employs hydraulic pressure in the main paths 1, 2 as pilot pressure and supplies pressure oil from feeding side to return side under neutral state. Consequently, upon switching of the changeover valve 5, pressure oil flows from feeding side main path 1 or 2 through the bleed off valve 21 to return,side main path 2 or 1 so as to suppress abrupt pressure rise in the main paths 1, 2 and switch the counter balance valve 13 slowly, thus preventing starting and stopping shock.
JP20954487A 1987-08-24 1987-08-24 Shock preventer for hydraulic motor drive circuit having counter balance valve Pending JPS6455402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20954487A JPS6455402A (en) 1987-08-24 1987-08-24 Shock preventer for hydraulic motor drive circuit having counter balance valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20954487A JPS6455402A (en) 1987-08-24 1987-08-24 Shock preventer for hydraulic motor drive circuit having counter balance valve

Publications (1)

Publication Number Publication Date
JPS6455402A true JPS6455402A (en) 1989-03-02

Family

ID=16574564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20954487A Pending JPS6455402A (en) 1987-08-24 1987-08-24 Shock preventer for hydraulic motor drive circuit having counter balance valve

Country Status (1)

Country Link
JP (1) JPS6455402A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009281460A (en) * 2008-05-21 2009-12-03 Bosch Rexroth Corp Hydraulic closed circuit for rotating work tool
JP2017145950A (en) * 2016-02-19 2017-08-24 日立建機株式会社 Hydraulic drive device of hydraulic motor and construction vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009281460A (en) * 2008-05-21 2009-12-03 Bosch Rexroth Corp Hydraulic closed circuit for rotating work tool
JP2017145950A (en) * 2016-02-19 2017-08-24 日立建機株式会社 Hydraulic drive device of hydraulic motor and construction vehicle

Similar Documents

Publication Publication Date Title
EP0364603A4 (en) Hydraulic pilot valve.
GB8804944D0 (en) Stepped piston for balanced pilot operated safety relief valve
DE3366068D1 (en) Hydraulic valve with dual feedback control
IT1175755B (en) PILOT SAFETY VALVE OPERATED BY MODULATION PRESSURE
GB2204652B (en) Fluid pressure control circuit for working vehicle having transmission operable by fluid pressure
ATE126325T1 (en) POSITION-CONTROLLED PROPORTIONAL WAY VALVE.
JPS6455402A (en) Shock preventer for hydraulic motor drive circuit having counter balance valve
EP0372081A4 (en)
CA2133267A1 (en) Valve Control Unit for Hydraulic Actuator
JPS57120704A (en) Confluent composite control valve
JPS5747003A (en) Control circuit for hydraulically operated elevator
AU1582983A (en) Pilot operated, flow feedback controlled hydraulic valve
JPS5715157A (en) Brake valve
JPS5490465A (en) Joining hydraulic circuit
JPS6414434A (en) Fluid pressure circuit for back hoe
JPS55135205A (en) Driving device for hydraulic actuator
JPS548272A (en) Fluidic pressure drive circuit
JPS6430904A (en) Shock preventing device for oil hydraulic motor driving circuit having counterbalance valve
JPS6479402A (en) Change-over valve unit for hydraulic-control circuit
JPS57102579A (en) Control circuit of concrete transporting pump
JPS5514361A (en) Proportional control type remote directional control valve device
JPS56101467A (en) Multiply connected hydraulic control valve
JPS5715170A (en) Automatic and manual switching over control unit
JPS6487927A (en) Clutch change-over controller
JPS5770761A (en) Controller for operation of mechanical brake of oil pressure motor