Mechanical lifting device

The utility model discloses a mechanical lifting device, and relates to the technical field of mechanical lifting. A rotating rod is rotatably connected between the left inner wall and the right inner wall of the base, a driving motor is fixedly connected to the side wall of the base, the output end of the rotating rod is fixedly connected with the output end of the driving motor through a coupler, the outer surface of the rotating rod is fixedly sleeved with a driving gear, and a threaded rod is rotatably connected to the inner bottom wall of the base. One end of the threaded rod penetrates through the upper inner wall of the base and extends out of the base, the threaded rod is located in the base and fixedly sleeved with a driven gear on the outer surface, the driving gear is meshed with the driven gear, the outer surface, extending out of the base, of the threaded rod is in threaded connection with a lifting plate, a sliding rod is fixedly connected to the upper surface of the base, and the lifting plate