Fecha de publicación: 29/07/2022 Fuente: Wipo Tobacco Agriculture The invention discloses a grading machine which is mainly applied to the technical field of tobacco grading and comprises a framework, a skin, a control room, a motor, a cross commutator, a transmission shaft, a right-angle commutator, a ball screw and a lifting table, the framework is arranged in the skin and connected with the skin to form a grading machine shell, and the control room is arranged in front of the grading machine. The motor is installed on the top of the framework and connected with the cross commutator, the cross commutator is connected with the transmission shaft, the tail end of the transmission shaft is connected with the right-angle commutator, and the right-angle commutator is connected with the ball screw. By applying the grading machine, imaging errors caused by inconsistent distances between the camera and the tobacco leaves in different tobacco frames and between the light source and the tobacco leaves in the different tobacco frames are eliminated, the grading machine is reasonable in structural design, safe and reliable in operation, stable in illumination environment and extremely convenient to install, use, debug and maintain, grading accuracy and grading efficiency are improved, and grading work can be completed in batches.