| 摘要 |
PROBLEM TO BE SOLVED: To improve workability in assembly and disassembly of a revolving superstructure.SOLUTION: A revolving superstructure 1 comprises a revolving frame 10 which has a length direction, side frames 30R and 30L which are mounted to right and left sides of the revolving frame 10 in a freely removable manner, engines 52R and 52L and hydraulic pumps 54R and 54L which are installed on the right and left side frames 30R and 30L, a plurality of actuators 20 installed in the revolving frame 10 and connected to the hydraulic pumps 54R and 54L, and a plurality of valve units 70 which control the flow rate of a hydraulic fluid supplied from the hydraulic pumps 54R and 54L to the actuators 20. The plurality of valve unit 70 are disposed between the hydraulic pumps 54R and 54L and the actuators 20 in a width direction (lateral direction Y) of the revolving frame 10 and are arranged side by side in the length direction (longitudinal direction X) of the revolving frame 10. |
