| 摘要 |
A construction machine comprising two hydraulic pumps; right and left traveling motors for causing the construction machine to travel; work machine actuators for actuating a work machine of the construction machine; a control valve which makes control so that a hydraulic oil discharged from the two hydraulic pumps is fed to at least either the right and left traveling motors or the work machine actuators and so that when both traveling operation and work machine operation are performed simultaneously, the hydraulic oil discharged from one of the two hydraulic pumps is fed to the traveling motors and the hydraulic oil from the other hydraulic pump is fed to the work machine actuators, the control valve providing communication between the two hydraulic pumps through a pump communication path; a drive signal detecting device which detects drive signals with respect to the two hydraulic pumps when the traveling operation and the work machine operation are performed simultaneously; and a controller which controls the controls valve so as to throttle or close the pump communication path in accordance with the drive signals detected by the drive signal detecting device. According to this construction machine, pressure interference is not likely to occur between the two hydraulic pumps, nor is it likely that oil may flow from a high pressure side to a low pressure side, causing the high pressure side to become inoperative and the low pressure side to become accelerated.
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