The invention discloses a
carriage for a dump
truck or a dump semitrailer, which comprises a bottom plate, side plates, a front plate and a rear plate, and is characterized in that the bottom plate isprovided with a sinking part, and the sinking part is positioned on the median line of the bottom plate and extends along the length direction of the bottom plate;
hooking and folding parts are arranged on the lower sides of the side plates, and after the bottom plate and the side plates are welded, the
hooking and folding parts are closed by the bottom plate to form a hollow beam so as to reinforce and protect a
welding part. The sinking part is designed, so that loaded materials automatically move towards the middle, and the purposes of automatically centering and lowering the
gravity center are achieved; and after the side plates and the bottom plate are welded and fixed, the
hooking parts and the bottom plate form hollow longitudinal beams, so that the overall structural strength of the
carriage is improved, particularly, the
welding positions of the bottom plate and the side plates are reinforced and protected, the situation that the
welding positions are broken is reduced, and the anti-
swelling capacity of the side plates can be improved to a certain extent.