The multi-motor oil-free dry frame head and frame tail drafting drive system for ring spinning frame includes front roller motor, front roller gear box, middle and rear roller motor, middle and rear roller gear box, and three roller trains. The front roller motor is connected via a synchronizing belt to the front roller gear box, and the two output shafts of the front roller gear box are connected via synchronizing belts to the right and left front rollers separately. The middle and rear roller motor is connected via a synchronizing belt to the middle and rear roller gear box, and the four output shafts of the middle and rear roller gear box are connected via synchronizing belts to the right and left middle rollers and right and left rear rollers separately. The present invention adopts triphase permanent magnetic sync motor for driving and open-loop control, and has simple structure, smooth driving, high precision, easy regulation in spinning process and expanded technological application range. |