This invention relates to the field of drilling equipment technology, and more particularly to a mobile drilling device suitable for
mineral exploration engineering. It includes a drilling rig body, a fixed base mounted on the drilling rig body, a lifting base movably mounted on the fixed base, a movable base slidably connected to the lifting base, a rotating cylinder rotatably connected to the movable base, a
drill bit rotatably mounted at the bottom of the rotating cylinder, a drive
assembly on the lifting base, and an auxiliary
assembly inside the
drill bit. This invention uses the drive
assembly to drive the
drill bit and the rotating cylinder to rotate in opposite directions at a differential speed. First, it causes the rotating cylinder to synchronously and intermittently lift, enabling
impact crushing of the bottom of the borehole to improve drilling efficiency. Then, combined with the rotation of the rotating cylinder, it drives multiple auxiliary crushing discs within the auxiliary assembly to revolve around the
drill bit while simultaneously rotating rapidly on their own axis. These auxiliary crushing discs thoroughly crush the area around the bottom of the
drill bit, assisting in the overall crushing effect after the
drill bit descends, further improving drilling efficiency.