High-sealing three-phase asynchronous motor

The utility model relates to the technical field of three-phase asynchronous motors, and discloses a high-sealing three-phase asynchronous motor, which comprises a three-phase asynchronous motor body, and is characterized in that the rear end face of the three-phase asynchronous motor body is movably provided with a heat dissipation rear cover in a screw-thread fit manner; the three-phase asynchronous motor body and the heat dissipation rear cover are sealed through a sealing structure which extrudes each other, and an abutting structure which extrudes the sealing structure is arranged in the three-phase asynchronous motor body. According to the utility model, the force is transmitted to the heat dissipation rear cover, so that the mutual extrusion between the screw-thread fit in the process of pushing the heat dissipation rear cover to move is tighter, the secondary locking function is realized through the feedback mode, the overall sealing performance of the three-phase asynchronous motor is improved, the l