Sorting trolley for double-layer linear sorting machine

The utility model discloses a sorting trolley for a double-layer linear sorting machine. The straight-rail road wheel comprises a frame, two straight-rail road wheels and two composite outer wheels, and the two straight rail travelling wheels are respectively arranged at a group of diagonal positions of the frame. And for the composite outer wheel and the straight rail walking wheel on the same side of the frame, the composite outer wheel is arranged close to the outside relative to the straight rail walking wheel. The composite outer wheels and the straight rail walking wheels are respectively arranged at the two groups of diagonal positions of the sorting trolley, and the composite outer wheels and the straight rail walking wheels on the same side are staggered, so that when the sorting trolley enters a matched bent rail, the straight rail walking wheels can be naturally separated from the rail inwards or outwards. In addition, the composite inner wheel and the composite outer wheel are respectively matched