| 摘要 |
PROBLEM TO BE SOLVED: To provide a working machine improved in operability when changing a tilting direction of a hydraulic pump and having high reliability.SOLUTION: The working machine includes: a pump cylinder 16 having a servo piston 16a for adjusting a tilting angle of an inclined plate 12a of a main pump 12, a forwarding control pressure chamber 16b making a braking pressure act in a forward direction of the servo piston 16a, and a backward control pressure chamber 16c making the braking pressure act in the backward direction of the servo piston 16a. The working machine controls either of forward and backward electromagnetic proportional valves 17a, 17b which control the pressure in either of the forward and backward control pressure chambers 16a, 16c connected to a side where the volume of the main pump 12 is increased, when the tilting direction of the inclined plate 12a of the main pump 12 is changed, and the working machine sets the volume of the main pump 12 and also controls the other of the forward and backward electromagnetic proportional valves 17a, 17b so as to adjust the tilting rate of the inclined plate 12a of the main pump 12. |
