Cap screwing device

The invention discloses a cap screwing device which comprises a stand column, a mounting plate, motors, a rotating wheel, a rail, sliding rails, cap screwing mounting plates and cap screwing wheels. The mounting plate is vertically mounted at the upper end of the stand column; one motor is mounted in the middle of the upper end of the mounting plate; the rotating wheel is connected to the lower part of the motor and located on the lower end face of the mounting plate; the rail is mounted on one side of the lower end of the mounting plate; the two sliding rails are connected onto the rail in a sliding mode; one cap screwing mounting plate is mounted on the lower end face of each sliding rail; one end of each cap screwing mounting plate extends out of the side face of the mounting plate; the motors are mounted on the two cap screwing mounting plates respectively; the lower parts of the motors are connected with the two cap screwing wheels through two parallel rotating shafts respectively; and one sides, facing the bottom part of the mounting plate, of the cap screwing mounting plates are fixedly connected with the rotating wheel. According to the cap screwing device provided by the invention, the distance between the cap screwing wheels can be adjusted, the rotating force of the cap screwing wheels can also be adjusted, the cap screwing device is wide in adaptability to bottle caps, and adjustment is simpler and more convenient after the specifications of the bottle caps are replaced.