Drilling mechanism of single-arm drilling machine

The utility model belongs to the technical field of rock drilling machinery, and particularly relates to a drilling mechanism of a single-arm drilling machine, which comprises a drilling arm, the drilling arm is provided with a driving mechanism, the driving mechanism is used for driving a precession motor to do linear motion, the drilling arm is provided with a mounting component along the length direction of the drilling arm, and the mounting component is used for fixing a drill rod. A plurality of drill rods are fixed through the mounting assembly, the drill rods are grabbed and moved to designated positions through the grabbing assembly, the driving mechanism drives the screw-in motor to move downwards, the screw-in motor is started, the drill rods are driven by the driving mechanism to move downwards, the drill rods are driven to move downwards, and the drill rods are fixed through the fixing assembly. The output end of the screw-in motor is in threaded connection with the top end of the drill rod, the d