Hitachi Construction Machinery Patente

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An inspection workflow management system includes: a server that manages an inspection workflow for an instruction of an inspection procedure of a work machine; and a terminal connected to the server via a network, in which the terminal includes a communication section that is connected to the work machine as an inspection target and acquires identification information of the work machine, a display section that displays the inspection workflow including an instruction to acquire moving image data of an inspection target part of the work machine, an operation section that inputs inspection-related information corresponding to the inspection workflow, and an image capturing section that acquires the moving image data of the inspection target part, the server includes a storage section that stores machine attribute information of the work machine, which has been associated with the identification information, and stores the moving image data of the inspection target part, which has been acquired by the terminal, the terminal associates the identification information and the inspection-related information with the moving image data of the inspection target part, which has been acquired by the image capturing section, the server stores the machine attribute information in further association with the associated moving image data of the inspection target part, to the storage section, and the terminal or the server further includes a retrieval section that extracts the moving image data of the inspection target part associated with at least one of the identification information input to the terminal, the inspection-related information, and the machine attribute information.

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A controller calculates, on the basis of map data and a loading amount of a vehicle, a return power amount that is a power amount required to travel from each point on a travelling route to a charging point that is a point provided with a power supply, before the vehicle starts to travel on the travelling route from the charging point to a predetermined destination, calculates a predicted power amount serving as a battery remaining amount of the power storage device at each point on the travelling route from a current position of the vehicle to the predetermined destination, while the vehicle is travelling along the travelling route toward the predetermined destination, and changes the destination of the vehicle from the predetermined destination to another destination when there is a point where the predicted power amount falls below the return power amount among points on the travelling route from the current position to the predetermined destination.

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The work machine such as the electric excavator 100 of the present invention includes a vehicle body with a working device, an AC/DC converter 111 installed on the vehicle body to receive power from the grid power supply 400, and a high voltage battery 112 attached to the vehicle body, and operates by power received from the grid power supply 400 and the high voltage battery 112 through the AC/DC converter 111. Furthermore, the work machine includes a first data transmission/reception 125 that receives information output by an external device, the server 500, and a vehicle controller 120 that sets the power received from the grid power supply 400 based on the information received by the first data transmission/reception 125. This provides a work machine, electric power control method, and electric power control system that can more appropriately distribute the power obtained from the grid power supply to the work machine, achieving both a reduction in the load on the grid power supply and improved work efficiency at the work site.

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The work machine includes a vehicle body, a camera for capturing the surroundings of the vehicle body, a monitor for displaying the camera image photographed by the camera, a monitor operation device for instructing changes in the display magnification of the camera image displayed on the monitor, and a controller for controlling the display of the monitor in response to the operation of the monitor operation device. The controller notifies the operator of caution or disables the change in display magnification instructed by the monitor operation device when the display magnification instructed by the monitor operation device is outside the predetermined magnification range and predetermined operating conditions are met before the operation of the vehicle body. This suppresses the deficiency of the area displayed on the monitor relative to the proper display target area during operation.

A construction machine includes a machine body, a cabin provided on the machine body and occupied by an operator, a surroundings detecting device for detecting an obstacle in the surroundings of the machine body, a warning device provided in the cabin, and a controller that controls the warning device to attract attention when the surroundings detecting device detects an obstacle in a detection range set in advance, in which the construction machine includes a work state switching device that switches the construction machine between a workable state and an unworkable state, and the controller sets a first range predefined in the surroundings of the machine body as the detection range when the work state switching device has switched to the workable state, and sets a second range, as the detection range, having at least a portion defined as being smaller than the first range when the work state switching device has switched to the unworkable state.Thus, it is possible to report the presence of an obstacle in the surroundings to the operator while restraining unnecessary warnings in the unworkable state.

A power control system 1 is provided, which includes: a surrounding camera 510 for detecting an object in a periphery of a power cable 200 which supplies electric power to an electric shovel 100 operated by the electric power and an object detection computation-unit 520 which limits the electric power to be supplied to the electric shovel 100, when a distance between the object detected by the surrounding camera 510 and the power cable 200 falls within a range determined in advance. As a result, a power control system and a power control method which can suppress contact of the object with the power cable and allow the working machine to be operated more safely can be provided.

Provided is an electrically driven work machine including a battery, an electrically driven motor that uses electric power of the battery as a driving source, a hydraulic pump that is driven by the electrically driven motor and that pumps a hydraulic operating fluid into a hydraulic actuator, a hydraulic operating fluid cooling circuit having an oil cooler that cools the hydraulic operating fluid, a cooling refrigerant circuit that circulates a cooling refrigerant, and a battery temperature adjusting circuit that circulates a heat medium that adjusts a temperature of the battery, the battery temperature adjusting circuit having an electric heater that heats the heat medium, a battery cooling heat exchanger that cools the heat medium by making the heat medium exchange heat with the cooling refrigerant circulating through the cooling refrigerant circuit, and a battery warming-up heat exchanger that heats the heat medium by making the heat medium exchange heat with the hydraulic operating fluid flowing through the hydraulic operating fluid cooling circuit.

The construction machine includes a flow control valve as a hydraulic equipment that adjusts the flow rate supplied to the hydraulic cylinder for driving the work implement, and a controller that controls the hydraulic cylinder to meet the condition that the work tool does not move beyond the target surface. The controller calculates the target speed of the hydraulic cylinder such that the work tool meets the condition, based on the detection information of the detection device that detects the posture of the work implement and the information of the target surface. Then, if the target value of the hydraulic equipment corresponding to the calculated target speed is smaller than the lower limit value that can ensure the accuracy of flow rate control, the controller recalculates the target speed of the hydraulic cylinder such that the work tool meets the condition based on the limit speed of the hydraulic cylinder obtained from the lower limit value, and controls the hydraulic equipment by the target value corresponding to the recalculated target speed.

When the control lever is not operated, the discharge pressure of the main pump can be maintained at a pressure above a predetermined minimum pressure. Additionally, when the control lever is operated, it ensures that sufficient flow rate of pressure oil is supplied to the hydraulic actuator of the directional control valve, which is tandem-connected downstream of the bypass cut valve placed in the middle of the center bypass oil passage. Therefore, a bypass cut valve is placed between the first directional control valve and the second directional control valve in the center bypass oil passage. The controller maintains the opening area of the bypass cut valve at a predetermined minimum opening area when all the directional control valves are in the neutral position, and controls the discharge flow rate of the main pump such that the discharge pressure of the main pump is at a pressure equal to or greater than a predetermined minimum discharge pressure. Then, when the second directional control valve, located downstream of the bypass cut-off valve, is operated, the controller controls the increase in the opening area of the bypass cut-off valve as the spool stroke amount of the second directional control valve increases.

Provided is a work machine capable of achieving significant increases and decreases in engine rotational speed and easy fine adjustment thereof. The work machine includes: a power device that drives rotation; a work device that operates using the power device as a power source; and an instruction device that instructs an increase and a decrease in rotational speed of the power device. The instruction device includes a first instruction device and a second instruction device. A minimum change unit of the rotational speed of the power device that can be instructed by the first instruction device is different from a minimum change unit of the rotational speed of the power device that can be instructed by the second instruction device.

Provided are an operation device and a work machine provided with the same, the operation device being capable of instantly adjusting an audio player sound volume even when the audio player sound volume sounds quite or loud as a result of adjusting an engine speed during audio playback, or capable of instantly adjusting an air conditioner air volume even when it is desired to suppress engine power loss or to improve fuel efficiency by reducing an air volume of an air conditioner as a result of adjusting an engine speed during operation of the air conditioner. In the operation device in which an engine speed adjustment function and an audio player sound volume adjustment function are exclusively assigned to a rotation operation of a dial, in a state in which the engine speed adjustment function is assigned to the rotation operation of the dial, the assignment of the rotation operation of the dial is switched to the audio player sound volume adjustment function by tilting the dial in one direction. In a state where the audio player sound volume adjustment function is assigned to the rotation operation of the dial, the assignment of the rotation operation of the dial is switched to the engine speed adjustment function by tilting the dial in a direction opposite to that when the assignment of the rotation operation of the dial is switched from the engine speed adjustment function to the audio player sound volume adjustment function.