Novel vacuum pump permanent magnet motor rotor structure

The utility model belongs to the technical field of vacuum pumps, and particularly relates to a novel vacuum pump permanent magnet motor rotor structure. The novel vacuum pump permanent magnet motor rotor structure provided by the utility model is good in use effect. The rotor comprises a rotor magnet yoke 1, the rotor magnet yoke 1 comprises a front narrow-diameter part 5 and a rear wide-diameter part, the narrow-diameter part 5 and the rear wide-diameter part are in arc transition, the front outer wall of the narrow-diameter part 5 is provided with a first circular-ring-shaped protrusion 7, the front outer wall of the wide-diameter part is provided with a second circular-ring-shaped protrusion 18, and the rear outer wall of the wide-diameter part is provided with an annular groove 19. The motor is characterized in that a permanent magnet ring 2 is sleeved on the outer wall of a wide-diameter part between the rear end of the second annular bulge and the front end of the annular groove. 一种新型真空泵永磁电机转子结构属于真空泵技术