| 摘要 |
<p>An excavator combined with a lateral surface cutter is provided. Specially, a tunnel can be excavated in the form of a half moon or arc. The excavator can perform an advancing excavation and a lateral excavation in order to surface-cut a lateral surface at right angle and at horizon. The excavator includes: a boom rotatably combined with a car body by a boom rotating pin; an arm reciprocally combined with the boom by an arm rotating pin; a triangular clamp detachably combined with the arm using connectors; a cylindrical surface cutter which is combined with the corner of the clamp facing the connectors; and a hydraulic cylinder which enables a piston rod is reciprocated using the hydraulic pressure and the surface cutter to move to the left and right around the hinge pins.</p> |
