Driving part of rock-socketed drilling machine

The utility model provides a driving part of a rock-socketed drilling machine. Wherein the two variable-frequency motor sets are symmetrically arranged, the thrust bearing box is in transmission connection with the variable-frequency motor, and the driving part shell is used for installing the variable-frequency motor sets and the thrust bearing box. Each variable-frequency motor set comprises a plurality of variable-frequency motors, a planetary gear box which is in transmission connection with the variable-frequency motors and is fixedly installed on the driving part shell, and a small gearshaft assembly which is fixedly connected with an output shaft of the planetary gear box and is arranged in the driving part shell. The driving part is driven by a variable frequency motor, the speedchange range is wide, the output energy efficiency is high, the output torque is large, forward and reverse rotation and stepless speed change can be achieved, and very large axial loads can also be borne. Two thrust spherical