35 results about "Irregular teeth" patented technology

The invention discloses an automatic door closing device comprising boxes. Vertically-symmetric sliding cavities are fixedly arranged in the boxes, driving motors are fixedly arranged in the lower endwalls of the sliding cavities, upper and lower output shafts of the driving motors are connected with the end walls of the sliding cavities in a rotating fit mode, and threads are fixedly arranged onthe outer surfaces of output shafts of the driving motors; sliding blocks are arranged in matched connection with the threads of the output shafts of the driving motors, rotating cavities with openings facing the centerlines of the boxes are fixedly arranged in the sliding blocks, and a plurality of connecting rods are connected to the upper and lower end walls of each rotating cavity in a rotating fit mode; and main gears and worm gears are fixedly arranged on the outer surfaces of the connecting rods, rotating motors are fixedly arranged on the rear end walls of the rotating cavities, and worms connected with the front end walls of the rotating cavities in a rotating fit mode are fixedly arranged on the front end faces of output shafts of the rotating motors. The automatic door closingdevice is simple in structure and convenient to use; and the automatic door closing device achieves the efficient and automatic differential door opening and closing function through the worm gears, the worms and an irregular tooth type mechanism, and the using convenience and pleasure degree of users are improved.