| 摘要 |
Disclosed is an articulated apparatus for positioning a rock drill comprising a self-propelled vehicle having a chassis propelled by endless tracks, a carriage for carrying an engine for driving the tracks, and a rotary drive for power actuated rotation of the carriage relative to said chassis through a full 360 DEG about an upright first axis. A boom is mounted with one end at the carriage for power actuated pivoting thereon about a second axis perpendicular to the upright first axis. An arm is carried by another end of the boom for power actuated pivoting thereon about a third axis parallel with the second axis. A feedshell is provided for guiding and reciprocating a rock drill toward and away from a drill point entry location adjacent to one end of the feedshell. The feedshell is mounted at the distal end of the arm by a feedshell pivot member for power actuated pivoting of the feedshell about a fourth axis parallel with the second and third axes, and for power actuated pivoting of the feedshell about a fifth axis to tilt the feedshell in a plane perpendicular to a plane defined by articulation of the boom and the arm, the fifth axis being perpendicular to the second, third and fourth axes.
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