Hollow permanent magnet motor shaft structure

The utility model discloses a hollow permanent magnet motor shaft structure, a motor shaft body is a hollow structure, the hollow permanent magnet motor shaft structure comprises a motor shaft body, a first spring playing an elastic reset role is fixedly installed in the motor shaft body, and the tail end of the first spring is fixedly connected with a clamping block. The clamping blocks are symmetrically distributed about the center of the motor shaft body; and the movable blocks are in one-to-one correspondence with the clamping blocks. According to the hollow permanent magnet motor shaft structure, when a motor shaft body is inserted into a lap joint column, the motor shaft body pushes a bearing plate downwards, at the moment, the bearing plate enables an elastic rope to be in a stretched state, meanwhile, an inclined face of a clamping block is extruded, the clamping block moves towards the interior of the motor shaft body, and a first spring is in a compressed state; when the clamping block and the clamp