| 摘要 |
The purpose of the present invention is to provide a hydraulic shovel: with which pressure interference during combined operation of a boom cylinder, an arm cylinder and a bucket cylinder can be avoided; which improves usability; and which can reduce horsepower loss. The hydraulic apparatus is set so that the ratio of the pressure-receiving area (B) of the respective bottom oil chambers (35) of the boom cylinder (16), the arm cylinder (17) and the bucket cylinder (18) to the pressure-receiving area (R) of the respective rod oil chambers (36) matches the ratio of the extruded volume drawn into or discharged from the bottom oil chambers (35) per single rotation by the respective extrusion members of the first hydraulic pump motor (30), the second hydraulic pump motor (31) and the third hydraulic pump motor (32) to the volume discharged from or drawn into the rod oil chambers (36). |
