Sandstone transportation device

The utility model relates to the technical field of gravel transportation, in particular to a gravel transportation device which comprises two supporting frames, and the tops of the two supporting frames are jointly and fixedly connected with a U-shaped sliding rail. When materials are loaded to the tilting cart, the servo motor rotates to drive the threaded shaft to rotate, the threaded shaft rotates to drive the threaded block to move, the threaded block moves to drive the sliding plate and the box body to move, and the threaded shaft rotates to drive one threaded rod to rotate through the two bevel gears; wherein one threaded rod drives the other threaded rod to rotate through a transmission belt and two transmission wheels, and the two threaded rods rotate to drive a movable block and a rotating rod to move, so that the rotating rod moves downwards while the box body moves in the direction of the supporting frame, the part, making contact with gravel, of the conveying belt is gradually shortened, and when