Hydraulic driving system
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorMasahiro MATSUO
Life of this patent
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Abstract
In a hydraulic driving system, a plurality of loading-line driving devices adjust a flow rate of an operating liquid flowing from a loading-line pump to a loading-line actuator, and a steering-line driving device adjusts a flow rate of the operating liquid flowing from the steering-line pump to the steering actuator. When one of a plurality of loading-line actuators is driving, a switching valve device connects a loading-side passage and a steering-side passage. When any of the plurality of loading-line actuators is not driving, the switching valve device disconnects the loading-side passage and the steering-side passage.
Claims7
A hydraulic driving system comprising:
- a loading-line pump device configured to discharge an operating liquid at a flow rate corresponding to a first load sensing pressure signal input to the loading-line pump device;
- a loading-line driving device connected to one loading-line actuator or a plurality of loading-line actuators and also connected to the loading-line pump device through a loading-side passage, the loading-line driving device being configured to adjust a flow rate of the operating liquid flowing from the loading-line pump device to the one loading-line actuator or the plurality of loading-line actuators;
- a steering-line pump device configured to discharge the operating liquid at a flow rate corresponding to a second load sensing pressure signal input to the steering-line pump device;
- a steering-line driving device connected to a steering actuator and also connected to the steering-line pump device through a steering-side passage, the steering-line driving device being configured to adjust a flow rate of the operating liquid flowing from the steering-line pump device to the steering actuator;
- and
- a switching valve device configured to (i) connect the loading-side passage and the steering-side passage in a loading-line actuator operating state in which the one loading-line actuator operates or at least one of the plurality of loading-line actuators operates and (ii) disconnect the loading-side passage and the steering-side passage in a loading-line actuator stop state in which the one loading-line actuator does not operate or any of the plurality of loading-line actuators does not operate.
Dependencies are inferred from the claim text.