Tooth cutting device of plate toothing machine

The invention provides a tooth cutting device of a plate toothing machine. The tooth cutting device comprises a rack, a fixed shear knife with a tooth-shaped blade is arranged below the rack, a hydraulic cylinder is arranged above the rack in the transverse direction, a rocker is rotatably arranged on a piston rod of the hydraulic cylinder, the other end of the rocker is rotatably connected to a knife rest, a movable shear knife which is provided with a tooth-shaped blade and is matched with the fixed shear knife is arranged at the bottom of the knife rest, a guide column is arranged on the rack in the longitudinal direction, and the knife rest is arranged on the guide column in a sliding and sleeving manner. According to the tooth cutting device, the rocker and the guide column are matched with each other, and transverse movement of the knife rest is converted into vertical movement, so that the movable shear knife and the fixed shear knife are matched with each other to achieve tooth cutting machining, over