| 摘要 |
PROBLEM TO BE SOLVED: To provide a shovel the machine body of which can be prevented from being dragged in an excavation operation.SOLUTION: The shovel relating to the embodiment of the present invention carries out excavation according to an arm excavation operation including an arm closing operation, and includes: an excavation operation detection part 300 which detects that the arm excavation operation has been performed; a posture detection part 301 which detects the posture of the shovel; an allowable maximum pressure calculation part 302 which based upon the posture of the shovel, calculates as allowable maximum pressure Pthe pressure of a bottom-side oil chamber 8B of an arm cylinder 8 corresponding to excavation reaction force generated in dragging of the shovel caused by excavation reaction force; and an arm cylinder pressure control part 304 which controls the pressure of the bottom-side oil chamber 8B of the arm cylinder 8 so that the allowable maximum pressure Pis not exceeded when the arm excavation operation is carried out. |
