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ELECTROMAGNETIC PROPORTIONAL VALVE, HYDRAULIC CONTROL UNIT USING THE SAME, AND WORKING VEHICLE INCLUDING ELECTROMAGNETIC PROPORTIONAL VALVE AND HYDRAULIC CONTROL UNIT
To provide an electromagnetic proportional valve which enables simplification of an oil path system utilizing a pilot pressure.SOLUTION: An electromagnetic proportional valve includes: an electromagnetic solenoid 53; a pressure control spool 56 which operates in response to an electric current supplied to the electromagnetic solenoid 53; a first control port Ax which outputs a pilot pressure to be exerted on an operation control valve; and a second control port Bx which outputs a pilot pressure to be exerted on an operation mode setting valve. The pilot pressure of the first control port Ax is increased in conjunction with increase of the electric current supplied to the electromagnetic solenoid 53, and the pilot pressure of the second control port Bx is maintained to a value needed for operating the operation mode setting valve.SELECTED DRAWING: Figure 9
【課題】パイロット圧を利用する油路系の単純化を可能にする電磁比例弁を構成する。【解決手段】電磁ソレノイド５３と、電磁ソレノイド５３に供給される電流に対応して作動する圧力制御スプール５６と、作動制御弁に作用させるパイロット圧を出力する第１制御ポートＡｘと、作動モード設定弁に作用させるパイロット圧を出力する第２制御ポートＢｘとを備え、電磁ソレノイド５３に供給される電流の上昇に伴い第１制御ポートＡｘのパイロット圧を上昇させ、第２制御ポートＢｘのパイロット圧を作動モード設定弁の操作に必要な値に維持する。【選択図】図９
ELECTROMAGNETIC PROPORTIONAL VALVE, HYDRAULIC CONTROL UNIT USING THE SAME, AND WORKING VEHICLE INCLUDING ELECTROMAGNETIC PROPORTIONAL VALVE AND HYDRAULIC CONTROL UNIT
To provide an electromagnetic proportional valve which enables simplification of an oil path system utilizing a pilot pressure.SOLUTION: An electromagnetic proportional valve includes: an electromagnetic solenoid 53; a pressure control spool 56 which operates in response to an electric current supplied to the electromagnetic solenoid 53; a first control port Ax which outputs a pilot pressure to be exerted on an operation control valve; and a second control port Bx which outputs a pilot pressure to be exerted on an operation mode setting valve. The pilot pressure of the first control port Ax is increased in conjunction with increase of the electric current supplied to the electromagnetic solenoid 53, and the pilot pressure of the second control port Bx is maintained to a value needed for operating the operation mode setting valve.SELECTED DRAWING: Figure 9
【課題】パイロット圧を利用する油路系の単純化を可能にする電磁比例弁を構成する。【解決手段】電磁ソレノイド５３と、電磁ソレノイド５３に供給される電流に対応して作動する圧力制御スプール５６と、作動制御弁に作用させるパイロット圧を出力する第１制御ポートＡｘと、作動モード設定弁に作用させるパイロット圧を出力する第２制御ポートＢｘとを備え、電磁ソレノイド５３に供給される電流の上昇に伴い第１制御ポートＡｘのパイロット圧を上昇させ、第２制御ポートＢｘのパイロット圧を作動モード設定弁の操作に必要な値に維持する。【選択図】図９
ELECTROMAGNETIC PROPORTIONAL VALVE, HYDRAULIC CONTROL UNIT USING THE SAME, AND WORKING VEHICLE INCLUDING ELECTROMAGNETIC PROPORTIONAL VALVE AND HYDRAULIC CONTROL UNIT
電磁比例弁、電磁比例弁を用いた油圧制御ユニット及びこれらを備えている作業車
NISHIKAWA MASAAKI (author) / OYANAGI RYOSUKE (author)
2023-06-16
Patent
Electronic Resource
Japanese
Electromagnetic proportional valve and construction machine
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