| 摘要 |
An excavator combined with a side surface grinding unit is provided to excavate a necessary portion only when excavating a tunnel. An excavator combined with a side surface grinding unit comprises a boom(20), an arm(30), a triangle clamp(200), a cylindrical grinding unit(100), and a hydraulic cylinder. The boom is movably combined with a vehicle body by a boom rotation driving pin(22). The arm is reciprocated and connected with the boom by an arm rotation driving pin(32). The triangle clamp is combined with the arm by a connecting piece. The cylindrical grinding unit is connected with an edge surface of the clamp corresponding to the connecting piece, by a hinge pin, and rotated by hydraulic pressure. The cylindrical grinding unit includes a plurality of racks rotated to form a space or a tunnel in an arc shape. The hydraulic cylinder combines the grinding unit and the clamp, and moves the grinding unit left and right about the hinge pin by reciprocating a piston rod using the hydraulic pressure. |
