Cutting torch lifting mechanism of cutting machine

The invention relates to a cutting torch lifting mechanism of a cutting machine. The cutting torch lifting mechanism comprises a frame, a connecting plate, a screw rod, a speed reducer, a linear guide rail, a telescopic dustproof cover, a transitional rod and a cutting torch, wherein the parts are not connected with the frame; the upper end of the screw rod is mounted with a gasket; the lower end of the screw rod penetrates through the frame and is suspended on the frame; the driving device is connected to the screw rod; one end of the connecting plate is connected with the driving device; the other end of the connecting plate is connected with the upper end of the linear guide rail; the lower end of the guide rail penetrates through the bottom of the frame; a guide rail slide bock is mounted at the bottom of the longitudinal inner wall of the frame; the lower end of the guide rail is connected with one end of the transitional rod; the other end of the transitional rod is connected with the cutting torch; the telescopic dustproof cover is sleeved outside the linear guide rail outside the frame; and travel limiters are arranged at upper and lower ends of the longitudinal inner wall of the frame. The cutting torch lifting mechanism of the cutting machine, provided by the invention, has the advantages of small structure, low cost, anti-collision performance, convenience in operation and greater safety and reliability in use and can be manually adjusted; a cutting nozzle and other parts of the cutting torch can be protected; the cutting quality is improved; and the lifting precision and stability are guaranteed.