Driving mechanism for semi-automatic threading machine

The utility model discloses a driving mechanism for a semi-automatic threading machine, which comprises a machine table, a fixed plate transversely arranged in the machine table, a pneumatic telescopic cylinder arranged on the upper surface of the fixed plate, a telescopic rod arranged on the pneumatic telescopic cylinder and penetrating through the surface of the machine table, a pull ring arranged at the top of the telescopic rod, and side point positioning rods arranged on the upper surface of the machine table and positioned on two sides of the telescopic rod. The side point positioning rods are arranged on the two sides of the telescopic rod in a left-right sliding mode and provided with fixing bolts used for being fixed to the machine table, the portion, located at the rear end of the telescopic rod, of the upper surface of the machine table is provided with a vertex positioning rod, the vertex positioning rod is arranged on the upper portion of the workbench in a front-back sliding mode, and the vertex