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PROBLEM TO BE SOLVED: To lower costs by decreasing the number of components although individually and precisely performing supply flow rate control and discharge flow rate control in performing oil supply control over a hydraulic actuator.SOLUTION: A hydraulic actuator control circuit is provided with: flow control valves 25-32 which control supply flow rates from hydraulic pumps 1, 2 to hydraulic actuators 6-10; direction selector valves 33-37 which are arranged downstream from the flow control valves 25-32, and change feed/discharge directions of working oils to the hydraulic actuators 6-10 and also control discharge flow rates from the hydraulic actuators 6-10; and bypass valves 47, 48 which control bypass flow rates of flows from the hydraulic pumps 1, 2 to an oil tank 3. Further, the hydraulic actuator control circuit is provided with a controller which controls operations of the flow control valves 25-32, direction selector valves 33-37 and bypass valves 47, 48.SELECTED DRAWING: Figure 1
【課題】油圧アクチュエータに対する油給排制御を行うにあたり、供給流量制御と排出流量制御とを個別に精度よく行えるようにしたものでありながら、部品点数を削減してコストダウンを図る。【解決手段】油圧ポンプ１，２から油圧アクチュエータ６〜１０への供給流量を制御する流量制御弁２５〜３２と、該流量制御弁２５〜３２の下流側に配され、油圧アクチュエータ６〜１０に対する作動油の給排方向を切換えるとともに油圧アクチュエータ６〜１０からの排出流量を制御する方向切換弁３３〜３７と、油圧ポンプ１、２から油タンク３に流れるバイパス流量を制御するバイパス弁４７，４８を設けるとともに、前記流量制御弁２５〜３２、方向切換弁３３〜３７およびバイパス弁４７，４８の作動を制御するコントローラを設けた。【選択図】図１
PROBLEM TO BE SOLVED: To lower costs by decreasing the number of components although individually and precisely performing supply flow rate control and discharge flow rate control in performing oil supply control over a hydraulic actuator.SOLUTION: A hydraulic actuator control circuit is provided with: flow control valves 25-32 which control supply flow rates from hydraulic pumps 1, 2 to hydraulic actuators 6-10; direction selector valves 33-37 which are arranged downstream from the flow control valves 25-32, and change feed/discharge directions of working oils to the hydraulic actuators 6-10 and also control discharge flow rates from the hydraulic actuators 6-10; and bypass valves 47, 48 which control bypass flow rates of flows from the hydraulic pumps 1, 2 to an oil tank 3. Further, the hydraulic actuator control circuit is provided with a controller which controls operations of the flow control valves 25-32, direction selector valves 33-37 and bypass valves 47, 48.SELECTED DRAWING: Figure 1
【課題】油圧アクチュエータに対する油給排制御を行うにあたり、供給流量制御と排出流量制御とを個別に精度よく行えるようにしたものでありながら、部品点数を削減してコストダウンを図る。【解決手段】油圧ポンプ１，２から油圧アクチュエータ６〜１０への供給流量を制御する流量制御弁２５〜３２と、該流量制御弁２５〜３２の下流側に配され、油圧アクチュエータ６〜１０に対する作動油の給排方向を切換えるとともに油圧アクチュエータ６〜１０からの排出流量を制御する方向切換弁３３〜３７と、油圧ポンプ１、２から油タンク３に流れるバイパス流量を制御するバイパス弁４７，４８を設けるとともに、前記流量制御弁２５〜３２、方向切換弁３３〜３７およびバイパス弁４７，４８の作動を制御するコントローラを設けた。【選択図】図１
HYDRAULIC ACTUATOR CONTROL CIRCUIT
油圧アクチュエータ制御回路
NAKAJIMA HIDEKI (author)
2017-01-26
Patent
Electronic Resource
Japanese
ELECTRO-HYDRAULIC CONTROL CIRCUIT OF A HYDRAULIC ACTUATOR FOR AN ELECTRIFIED WORK VEHICLE
| European Patent Office | 2024