Skip coal car: tipping bucket coal car, also known as rollover tub, ore bucket, bucket-type tub. By V-shaped or U-shaped tub cabin design, the tub can be in the car frame, flexible fixed and flipped change. The tipping bucket tub filled with material, so long as human open the stopper plate, it is possible to easily remove the material. Skip coal car common volume between 0.5 ~ 1m3, deadweight of about 1 ~ 2.5t.