Bottom plate unit, compartment bottom plate and vehicle

The utility model discloses a base plate unit, carriage base plate and vehicle, wherein the base plate unit comprises a bearing plate and a bearing piece, the two sides of the bearing plate are provided with splicing structures, the bearing plate comprises an upper layer plate and a lower layer plate which are connected, and a supporting structure, the supporting structure is arranged between the upper-layer plate and the lower-layer plate and is connected with the upper-layer plate and the lower-layer plate; the bearing parts are arranged on the edges of the two sides of the bearing plate and located below the splicing structure, and the bearing parts are used for being connected with longitudinal beams of a carriage body and supporting the bearing plate. According to the technical scheme, the bottom plate unit is light in weight and easy to maintain and replace, and production procedures and cost of the bottom plate unit can be reduced. 本实用新型公开一种底板单元、车厢底板和车辆，其中，底板单元包括承载板和承载件，所述承载板的两侧边设有拼接结构，所述承载板包括相连接的上层板和下