Cap screwing device

The utility model relates to the technical field of pharmaceutical equipment, in particular to a cap screwing device which comprises a rack, a conveying motor is fixed to the rack, a rotating shaft is further arranged on the rack, the rotating shaft is connected with the output end of the conveying motor, a cam is further fixed to the rotating shaft, and a mounting plate is further fixed to the rack. A cap screwing supporting plate is arranged above the mounting plate, a cap screwing motor is fixed to the cap screwing supporting plate, a cap screwing head is fixed to the output end of the cap screwing motor, a plurality of cap screwing supporting rods are fixed to the cap screwing supporting plate, and the cap screwing supporting rods penetrate through the mounting plate and are in sliding connection with the mounting plate. A connecting rod rotationally connected with the rack is further arranged on the rack, and rolling wheels are arranged on the connecting rod. The rotating shaft is supported through the r