Gearbox system with air pressure seal

The utility model discloses a gear box system with air pressure seal, which comprises a left side support shaft, a right side support shaft and a gear box body, a driving shaft bearing is embedded at the joint of the gear box body and the left side support shaft, and an input shaft is connected in the driving shaft bearing in a matching way. One end of the input shaft extends into the gear box body and is fixedly connected with a small bevel gear, a gas inlet hole is formed in the surface of the left side supporting shaft, the surface of the small bevel gear is in meshed connection with a large bevel gear, and one end of the large bevel gear is fixedly connected with an output shaft; by means of the driven shaft oil seal, the gear box cover, the driving shaft sealing ring and the gas inlet hole, the problem that a gear box sealing system is prone to breaking down in the low-temperature environment can be solved, the maintenance cost of equipment is reduced, the service life of the equipment is prolonged, and