The invention provides a downhole breaking rock-entering
drill of a hydraulic slewing drilling
machine and relates to a
rock breaking device applicable to a power head type full hydraulic slewing drilling
machine. The problems that in the drilling process, once an existing power head type full hydraulic slewing drilling
machine encounters a rock stratum, a
drill bit cannot enter the rock easily, the drilling efficiency is low, one-time
impact holing of a large-
diameter pile hole cannot be achieved, continuous hole bottom
slag discharge cannot be achieved, the rock entering speed is slow, the
drill bit is severely abraded, and the cost is high are solved. An oil circuit rotating connector
assembly is additionally arranged on a drill rod of the slewing drilling machine. A central shaft of the rotating connector
assembly is connected with the drill rod through a
flange. The lower end of the rotating connector
assembly is connected with a gas lifting hard rock
drill bit through a vibrator. In the drilling and rock entering processes, percussive drilling is adopted, the rock entering and drilling efficiency is improved, continuous gas lifting
slag discharge of the drilling machine is not changed while the vibrator conducts vibrating striking to cooperate with drilling of a
drill bit, and the functions of striking and drilling of the power head type full hydraulic slewing drilling machine are achieved.