Assembled sliding frame for trailer

An assembled sliding frame for trailer, comprising:

• longitudinal beams each comprising a top wall, a side wall formed by bending downward an outer edge of the top wall, and a bottom wall formed by bending inward a bottom of the side wall, with an opening formed between inner edges of the top wall and the bottom wall;
• transverse beams each comprising a top plate, two side plates extending downward from opposite sides of the top plate, a bottom plate located between bottoms of the two side plates and opposite to the top plate, and an end plate connected to ends of the top plate, the two side plates, and the bottom plate, wherein at least a part of an end of the transverse beam is inserted through the opening of the respective longitudinal beam, and the top plate is fixedly connected to the top wall by a first bolt extending traversely through the top plate and the top wall;
• and
• brackets each comprising an outer bracket arranged on an outer side of the side wall of the respective longitudinal beam, an inner bracket located on an inner side of the outer bracket and arranged opposite to the outer bracket, and a connecting base connected between the inner bracket and the outer bracket, wherein the outer bracket has a flat portion abutting against an outer surface of the side wall, the flat portion, the side wall and the end plate are fixedly connected to each other by a second bolt extending traversely through the flat portion, the side wall and the end plate;
• the inner bracket is fixedly connected with a connecting plate abutting against a lower surface of the bottom plate, and the connecting plate is fixedly connected to the bottom plate by a second bolt extending traversely through the connecting plate and the bottom plate.