Efficient water leakage prevention device for gear box

The utility model discloses an efficient leakproof device for a gear box, which comprises a gear box body and a rotating shaft inserted at one end of the gear box body, a sealing cover is sleeved on the rotating shaft, the sealing cover is fixedly connected with the gear box body, an oil seal I is arranged between the sealing cover and the rotating shaft, and the oil seal I is fixedly connected with the sealing cover. Half cylinders for protection are symmetrically arranged at one end of the sealing cover, the two half cylinders are fixedly connected, limiting blocks are symmetrically arranged at one end of the sealing cover, the limiting blocks are fixedly connected with the corresponding half cylinders respectively, inclined grooves are symmetrically formed in the sealing cover, corresponding inclined blocks are arranged in the inclined grooves in a sliding mode, and the inclined blocks are fixedly connected with the corresponding half cylinders. The sealing structure of the gearbox is reasonable in structu