Abstract: An electrical component housing device is provided with a housing box 21 formed with a maintenance opening 21a, a partition board 24 disposed in the housing box 21 and for separating the inside of the housing box 21, and an electrical component 25 attached to an electrical component attachment surface 24c as one of both surfaces of the partition board 24. The partition board 24 is pivotally supported by the housing box 21 around a pivot shaft 27 between a separation position where the inside of the housing box 21 is separated into an electrical component housing space S3 and a machine tool housing space S4 to face the electrical component attachment surface 24c to the electrical component housing space S3, and a maintenance position to face the electrical component attachment surface 24c to the maintenance opening 21a.

Abstract: An electrical component housing device is provided with a housing box 21 formed with a maintenance opening 21a, a partition board 24 disposed in the housing box 21 and for separating the inside of the housing box 21, and an electrical component 25 attached to an electrical component attachment surface 24c as one of both surfaces of the partition board 24. The partition board 24 is pivotally supported by the housing box 21 around a pivot shaft 27 between a separation position where the inside of the housing box 21 is separated into an electrical component housing space S3 and a machine tool housing space S4 to face the electrical component attachment surface 24c to the electrical component housing space S3, and a maintenance position to face the electrical component attachment surface 24c to the maintenance opening 21a.

Abstract: In a hydraulic excavator wherein a control valve unit having a plurality of control valves in a united form and an operation pattern switching valve for switching from one to another among combined patterns of operating valves and control valves are disposed side by side in front and rear positions respectively within a valve accommodating space formed between an upper frame base plate and a floor plate in an upper rotating body, the operation pattern switching valve is inclined forwardly downward in a state in which its upper surface side including an operating lever thereof faces an operation port being formed to the floor plate.

Abstract: In a hydraulic excavator wherein a control valve unit having a plurality of control valves in a united form and an operation pattern switching valve for switching from one to another among combined patterns of operating valves and control valves are disposed side by side in front and rear positions respectively within a valve accommodating space formed between an upper frame base plate and a floor plate in an upper rotating body, the operation pattern switching valve is inclined forwardly downward in a state in which its upper surface side including an operating lever thereof faces an operation port being formed to the floor plate.