Assembly-type car body and rail vehicle

A splicing-type vehicle body, comprising a roof, a underframe, side roofs and side walls located on two sides, wherein an upper edge of each side roof is connected to an edge of the roof, an upper edge of each side wall is connected to a lower edge of the side roof, a lower edge of each side wall is connected to an edge of the underframe;

• the roof, the underframe, the side roofs and the side walls are respectively formed by splicing double-layer pultruded profiles, each double-layer pultruded profile comprises an outer plate, an inner plate and chambers in an interlayer between the outer plate and the inner plate and separated by rib plates, wherein the upper edge and the lower edge of each side roof are respectively connected to the edge of the roof and the upper edge of the side wall through lapping joints, the lower edge of each side wall is connected to the edge of the underframe through a side wall connector;
• the side wall connector is a single double-layer pultruded profile, an upper edge of the side wall connector is connected to the lower edge of the side wall through a plug joint, and a lower edge of the side wall connector is connected to the edge of the underframe through a push-on joint,
• wherein each push-on joint comprises a push-on slot formed on an upper surface of the edge of the underframe and a push-on connector formed on the lower edge of the side wall connector;
• the push-on slot comprises a first push-on plate and a second push-on plate, the first push-on plate is located on an outer side, the second push-on plate is located on an inner side, and a distance between the first push-on plate and the second push-on plate gradually increases from top to bottom, and a trapezoidal push-on slot is formed between the first push-on plate and the second push-on plate;
• the push-on connector of the side wall connector has a trapezoidal cross section so as to be pushed into the push-on slot from an end.