To be capable of dealing with a machine body lifting operation or a sudden operation, while improving energy efficiency, during a boom-lowering operation, and achieving the reduction of the number of parts, in a construction machine equipped with a boom. It is configured such that a first region Y1 at which a recovery valve passage 16e is opened and a supply valve passage 16f is closed and a second region Y2 at which the recovery valve passage 16e and the supply valve passage 16f are opened, are provided at an operating position of a first boom control valve 16 during the boom lowering operation, and the first boom control valve 16 is positioned at the first region Y1 when neither a machine body lifting operation nor the sudden operation is performed during the boom-lowering operation, and at the region Y2 when the machine body lifting operation or the sudden operation is performed.

A system and method are provided for evenly distributing the loading of material in a loading container of a transport vehicle (e.g., articulated dump truck) by a work machine (e.g., excavator). At least one sensor mounted on the work machine generates data corresponding to at least a portion of the loading container. The captured data is processed to determine a current profile of material loaded in the loading container, wherein output signals are generated corresponding to a difference between the current profile and a predetermined target profile for the material loaded in the loading container. In certain embodiments, the output signals are used to assist an operator of the work machine with manual loading via an onboard display unit and superposed images associated with the current and/or target profiles. In other embodiments, the output signals automatically control at least part of the loading process.

A hydraulic system includes a first supply line connecting a boom control valve and a bottom side of a boom cylinder, a second supply line connecting the boom control valve and a rod side of the boom cylinder, a leveling switch valve having: a first operating position allowing a leveling operation of a working tool; and a first stopping position allowing the leveling operation to stop, a ride controller including: a ride-control switch valve connected to a branched fluid line branched from the first supply line; and an accumulator configured to perform an anti-vibrating operation for suppressing a pressure fluctuation of the boom cylinder, and a drain fluid line to discharge operation fluid in a downstream section extending from the leveling switch valve to the rod side of the boom cylinder in the second supply line when the leveling switch valve is switched to the first stopping position.

A shovel includes a lower traveling body, an upper turning body mounted on the lower traveling body; and a receiver, a direction detecting device, a controller, and a display device mounted on the upper turning body, wherein the receiver is configured to receive an image captured by a camera-mounted autonomous aerial vehicle, the direction detecting device is configured to detect a direction of the shovel, the controller is configured to generate information related to a target rotation angle of the camera-mounted autonomous aerial vehicle based on the direction of the shovel, and the display device is configured to display the captured image in a same direction as a direction of an image that is captured when the camera-mounted autonomous aerial vehicle rotates by the target rotation angle.

A shovel includes a lower traveling body, an upper turning body mounted on the lower traveling body; and a receiver, a direction detecting device, a controller, and a display device mounted on the upper turning body, wherein the receiver is configured to receive an image captured by a camera-mounted autonomous aerial vehicle, the direction detecting device is configured to detect a direction of the shovel, the controller is configured to generate information related to a target rotation angle of the camera-mounted autonomous aerial vehicle based on the direction of the shovel, and the display device is configured to display the captured image in a same direction as a direction of an image that is captured when the camera-mounted autonomous aerial vehicle rotates by the target rotation angle.

A shovel includes a lower traveling body, an upper turning body, an attachment including a boom, an arm, and an end attachment, a boom state detector configured to detect the state of the boom, an arm state detector configured to detect the state of the arm, an end attachment state detector configured to detect the state of the end attachment, and a hardware processor. The hardware processor is configured to obtain information on the position of the end attachment based on the respective outputs of the detectors, correlate the information on the position of the end attachment with information on the position of an underground object obtained based on the output of an underground object detector, and calculate the distance between the end attachment and the underground object. The hardware processor is further configured to control the shovel such that the distance is prevented from falling below a predetermined value.

A shovel includes a lower traveling body, an upper turning body mounted on the lower traveling body, an excavation attachment attached to the upper turning body, a posture detecting device configured to detect the posture of the excavation attachment, an instability detecting device configured to detect information on the instability of the upper turning body due to an excavation load, and a processor configured to correct the posture of the excavation attachment. The processor is configured to open an arm or a bucket of the excavation attachment in response to determining, based on the outputs of the posture detecting device and the instability detecting device, that the excavation load during deep excavation is more than or equal to a predetermined value.

Provided is a construction machine capable of improving the accuracy of load weight measurement without reducing the operational efficiency of a working device. A wheel loader 1 as a construction machine comprises a hydraulically driven working device 2 and a controller 5,5A for measuring the weight of a load, wherein the wheel loader 1 includes a changeover switch 121 as a changeover device for switching whether to measure the weight of the load, and in a case where an attitude of the working device 2 satisfies a predetermined load measurement condition, the changeover switch 121 is valid, and pistons 222, 242 are positioned in a first area provided on one end side or in a second area provided on the other end side, the controller 5, 5A limits the command current to be output to lift arm solenoid proportional valves 45 and the bucket solenoid proportional valves 46.

Provided is a construction machine capable of improving the accuracy of load weight measurement without reducing the operational efficiency of a working device. A wheel loader 1 as a construction machine comprises a hydraulically driven working device 2 and a controller 5,5A for measuring the weight of a load, wherein the wheel loader 1 includes a changeover switch 121 as a changeover device for switching whether to measure the weight of the load, and in a case where an attitude of the working device 2 satisfies a predetermined load measurement condition, the changeover switch 121 is valid, and pistons 222, 242 are positioned in a first area provided on one end side or in a second area provided on the other end side, the controller 5, 5A limits the command current to be output to lift arm solenoid proportional valves 45 and the bucket solenoid proportional valves 46.

A machine includes a frame, a plurality of traction devices supporting the frame, an engine and an operator cab mounted to the frame, an implement system configured to move the work tool to a desired position, position sensors, a tilt-rotate system to move the work tool to a desired orientation, orientation sensors, an operator interface, and a control module. The control module is configured to receive a model of the work tool, receive boundary inputs defining a virtual boundary, receive signals from the position sensors and the orientation sensors, receive implement control inputs from the operator interface, determine a position and orientation of the work tool based on the signals and the model, determine whether the work tool is approaching the virtual boundary based on the position and orientation, the boundary inputs, and the implement control inputs, and automatically prevent the work tool from crossing the virtual boundary.