Exchange asynchronous inner rotor motor

The utility model relates to an exchange asynchronous inner rotor motor, including casing, stator, rotor and motor end cover, the stator is fixed to be set up in the casing, and the rotor rotates and sets up in the stator, the fixed motor end cover that is equipped with in the both ends of casing, it distributes along its axis circumference equidistance more than two to be equipped with on the stator core's of stator the face of cylinder just follows its axis extend's tangent plane, arc cylinder between tangent plane and the tangent plane expands and presses on the casing inner wall, be equipped with coaxial location block group on motor end cover and the casing complex terminal surface, coaxial location block group includes more than two with one heart with stator core's arc cylinder, and the arc locating piece that distributes with rotor rotation axis circumference equidistance, the quantity of arc locating piece equals with the quantity of arc cylinder, the arc locating piece be located the motor end cover the edge and with the cooperation of the oral area of casing, arc locating piece and arc cylinder one -to -one. The utility model discloses an axiality is good, and can effectively solve the phenomenon of blocking when the ripple gasket is installed.