Material returning sleeve with adjusting effect

The utility model relates to the technical field of sleeves, and discloses a material returning sleeve with an adjusting effect, which comprises a box body and a locking mechanism arranged in the box body, and the locking mechanism comprises a worm, a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft, the worm gear is fixedly connected to the first rotating shaft, the two ends of the second rotating shaft are rotationally connected to the two sides of an inner cavity of the box through bearings, the first bevel gear is fixedly connected to the first rotating shaft, the second bevel gear is meshed with the first bevel gear, the first gear is fixedly connected to the second rotating shaft, and one end of the clamp is fixedly connected to the outer wall of one side of the box. According to the material returning sleeve with the adjusting effect, by arranging the locking mechanism, openings of the two locking arms can be adjusted by rotating a rotating handle, so th