Power-assisted lifting device in limited space

The utility model aims to provide a power-assisted lifting device in a limited space. The power-assisted lifting device comprises a cotter pin, a base, a bearing plate, a pin, a pull rod, a pressing ring and a locking nut. The base is of a stepped annular structure, and a groove is formed in the bottom face of the base in the diameter direction. The bearing plate is placed in the groove, a through hole I is formed in the center of the bottom face of the bearing plate, and a pin hole is formed in the center of the side face. The pull rod is a cylindrical rod, the flat end of the pull rod penetrates through the through hole I to be assembled with the bearing plate through a pin and a cotter pin, and the threaded end of the pull rod is assembled with the pressing ring through a locking nut. During use, the mold is placed on the top surface of the base, and the pull rod penetrates through the interior of the mold. The device can assist in realizing the carrying, mounting and dismounting requirements of the annula