A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PRESSURE CONTROL VALVE AND WORKING MACHINE
PROBLEM TO BE SOLVED: To provide a pressure control valve capable of performing more proper make-up control while realizing miniaturization, and a working machine with the same.SOLUTION: The pressure control valve comprises: a main poppet 51 for communicating an actuator port 48 with a tank port 49 when working oil pressure of the actuator port 48 is higher than that of a back pressure chamber 60; a pilot poppet 55 for communicating the back pressure chamber 60 with the tank port 49 when woking oil pressure of the back pressure chamber 60 is higher than that of the tank port 49; and a check valve 59 for communicating a make-up port 50 with the back pressure chamber 60 when working oil pressure Pm of the make-up port 50 is higher than working oil pressure P1 of the back pressure chamber 60. The main poppet 51 has a throttle flow passage 64 for communicating the back pressure chamber 60 with the actuator port 48.
【課題】小型化を実現しつつ、より適切なメイクアップ制御を可能とする圧力制御弁およびそれを備えた作業機械の提供。【解決手段】アクチュエータポート４８の作動油圧が背圧室６０の作動油圧より高い場合に、アクチュエータポート４８をタンクポート４９に連通させるメインポペット５１と、背圧室６０の作動油圧がタンクポート４９側の作動油圧より高い場合に、背圧室６０をタンクポート４９に連通させるパイロットポペット５５と、メイクアップポート５０の作動油圧Ｐｍが背圧室６０の作動油圧Ｐ１より高い場合に、メイクアップポート５０を背圧室６０に連通させるチェック弁５９とを備え、メインポペット５１は、背圧室６０をアクチュエータポート４８に連通させる絞り流路６４を有している。【選択図】図３
PRESSURE CONTROL VALVE AND WORKING MACHINE
PROBLEM TO BE SOLVED: To provide a pressure control valve capable of performing more proper make-up control while realizing miniaturization, and a working machine with the same.SOLUTION: The pressure control valve comprises: a main poppet 51 for communicating an actuator port 48 with a tank port 49 when working oil pressure of the actuator port 48 is higher than that of a back pressure chamber 60; a pilot poppet 55 for communicating the back pressure chamber 60 with the tank port 49 when woking oil pressure of the back pressure chamber 60 is higher than that of the tank port 49; and a check valve 59 for communicating a make-up port 50 with the back pressure chamber 60 when working oil pressure Pm of the make-up port 50 is higher than working oil pressure P1 of the back pressure chamber 60. The main poppet 51 has a throttle flow passage 64 for communicating the back pressure chamber 60 with the actuator port 48.
【課題】小型化を実現しつつ、より適切なメイクアップ制御を可能とする圧力制御弁およびそれを備えた作業機械の提供。【解決手段】アクチュエータポート４８の作動油圧が背圧室６０の作動油圧より高い場合に、アクチュエータポート４８をタンクポート４９に連通させるメインポペット５１と、背圧室６０の作動油圧がタンクポート４９側の作動油圧より高い場合に、背圧室６０をタンクポート４９に連通させるパイロットポペット５５と、メイクアップポート５０の作動油圧Ｐｍが背圧室６０の作動油圧Ｐ１より高い場合に、メイクアップポート５０を背圧室６０に連通させるチェック弁５９とを備え、メインポペット５１は、背圧室６０をアクチュエータポート４８に連通させる絞り流路６４を有している。【選択図】図３
PRESSURE CONTROL VALVE AND WORKING MACHINE
圧力制御弁および作業機械
KUMAGAI KENTO (author) / RYU SHOHEI (author)
2015-12-03
Patent
Electronic Resource
Japanese
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