Transmission device of movable guide sleeve of numerical control longitudinal cutting lathe

The utility model discloses a transmission device of a movable guide sleeve of a numerical control longitudinal cutting lathe, which comprises a main shaft, one end of the main shaft is provided with a connecting rod, the surface of the connecting rod is sleeved with a guide sleeve, the side surface of the guide sleeve is provided with a positioning structure, one side of the positioning structure is connected with an adjusting structure, the positioning structure comprises a limiting plane and a limiting block, and the limiting plane is connected with the adjusting structure. The limiting plane is located on the surface of the connecting rod, the limiting block is connected to the surface of the limiting plane in a pressing mode, an avoiding groove is formed in the guide sleeve, the surface of the limiting block is sleeved with the avoiding groove, the three positioning structures are connected to the surface of the connecting rod at equal angles, and by arranging the avoiding groove, shrinkage avoiding can