Servo motor for packaging machine

The invention relates to a servo motor for a packaging machine in the technical field of servo motors. The servo motor comprises a machine body, an output shaft, a bearing, a rotation shaft, a connecting plate, a first rotating plate and a second rotating plate, the movable assembly is used for enabling the first rotating plate and the second rotating plate to rotate and enabling the output shaft to move relative to the bearing; the machine body is started, the output shaft rotates at a high speed step by step, and under the action of centrifugal force, the second rotating plate rotates by 90 degrees, and the first rotating plate inclines, so that the output shaft moves in the direction close to the rotation shaft (the rotation shaft rotates at the original position), the positions of the bearing and the connecting plate are not changed, and the output shaft rotates stably. The connecting plate moves from one side of the movable groove to the other side of the movable groove, synchronous rotation of the outpu