A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HYDRAULIC SYSTEM OF WORKING MACHINE AND CONTROL VALVE
To easily operate a plurality of control valves (hydraulic actuators) in a series circuit.SOLUTION: A hydraulic system of a working machine comprises: a hydraulic pump for discharging a working fluid; a first hydraulic apparatus operated by the working fluid; a second hydraulic apparatus operated by the working fluid, and different from the first hydraulic apparatus; a first control valve for controlling the first hydraulic apparatus; a second control valve arranged at a downstream side of the first control valve, and controlling the second hydraulic apparatus; a communication passage for connecting the first hydraulic apparatus and the first control valve to each other, and making return oil being the working fluid which returns to the first control valve from the first hydraulic apparatus flow; a supply oil passage for connecting the first control valve and the second control valve to each other, and supplying the return oil to the second control valve; a connection oil passage formed at the first control valve, and connecting the communication passage and the supply oil passage; a discharge oil passage connected to the first control valve; a setting part arranged at the discharge oil passage, and boosting the pressure of the discharge oil passage; a branch flow passage branched from the connection oil passage, and connected to the discharge oil passage; and a throttle part arranged at the branch flow passage.SELECTED DRAWING: Figure 1
【課題】シリーズ回路において、複数の制御弁（油圧アクチュエータ）を容易に作動させることができる。【解決手段】作業機の油圧システムは、作動油を吐出する油圧ポンプと、作動油によって作動する第１油圧機器と、作動油によって作動し且つ第１油圧機器と異なる第２油圧機器と、第１油圧機器を制御する第１制御弁と、第１制御弁の下流側に設けられ且つ第２油圧機器を制御する第２制御弁と、第１油圧機器と第１制御弁を接続し且つ第１油圧機器から第１制御弁に戻る作動油である戻り油を流す連通路と、第１制御弁と第２制御弁を接続し且つ戻り油を第２制御弁に供給する供給油路と、第１制御弁に設けられ且つ連通路と供給油路とを接続する接続油路と、第１制御弁と接続されている排出油路と、排出油路に設けられ且つ排出油路の圧力を上昇させる設定部と、接続油路から分岐し且つ排出油路に接続された分岐流路と、分岐流路に設けられた絞り部と、を備えている。【選択図】図１
HYDRAULIC SYSTEM OF WORKING MACHINE AND CONTROL VALVE
To easily operate a plurality of control valves (hydraulic actuators) in a series circuit.SOLUTION: A hydraulic system of a working machine comprises: a hydraulic pump for discharging a working fluid; a first hydraulic apparatus operated by the working fluid; a second hydraulic apparatus operated by the working fluid, and different from the first hydraulic apparatus; a first control valve for controlling the first hydraulic apparatus; a second control valve arranged at a downstream side of the first control valve, and controlling the second hydraulic apparatus; a communication passage for connecting the first hydraulic apparatus and the first control valve to each other, and making return oil being the working fluid which returns to the first control valve from the first hydraulic apparatus flow; a supply oil passage for connecting the first control valve and the second control valve to each other, and supplying the return oil to the second control valve; a connection oil passage formed at the first control valve, and connecting the communication passage and the supply oil passage; a discharge oil passage connected to the first control valve; a setting part arranged at the discharge oil passage, and boosting the pressure of the discharge oil passage; a branch flow passage branched from the connection oil passage, and connected to the discharge oil passage; and a throttle part arranged at the branch flow passage.SELECTED DRAWING: Figure 1
【課題】シリーズ回路において、複数の制御弁（油圧アクチュエータ）を容易に作動させることができる。【解決手段】作業機の油圧システムは、作動油を吐出する油圧ポンプと、作動油によって作動する第１油圧機器と、作動油によって作動し且つ第１油圧機器と異なる第２油圧機器と、第１油圧機器を制御する第１制御弁と、第１制御弁の下流側に設けられ且つ第２油圧機器を制御する第２制御弁と、第１油圧機器と第１制御弁を接続し且つ第１油圧機器から第１制御弁に戻る作動油である戻り油を流す連通路と、第１制御弁と第２制御弁を接続し且つ戻り油を第２制御弁に供給する供給油路と、第１制御弁に設けられ且つ連通路と供給油路とを接続する接続油路と、第１制御弁と接続されている排出油路と、排出油路に設けられ且つ排出油路の圧力を上昇させる設定部と、接続油路から分岐し且つ排出油路に接続された分岐流路と、分岐流路に設けられた絞り部と、を備えている。【選択図】図１
HYDRAULIC SYSTEM OF WORKING MACHINE AND CONTROL VALVE
作業機の油圧システム及び制御弁
FUKUDA YUJI (author) / HONDA KEIGO (author)
2018-12-06
Patent
Electronic Resource
Japanese