Chassis component of railway vehicle, and railway vehicle

A chassis component of a railway vehicle, comprising two lower boundary beams provided at an interval and a sleeper beam provided between the two lower boundary beams, the sleeper beam comprising:

• a web structure;
• a center pin, connected with a bogie of a railway vehicle;
• and
• a mounting frame, connected with the web structure, the center pin being provided on the mounting frame, the mounting frame comprising a plurality of vertical plates, and the plurality of vertical plates being provided at an interval along an outer wall surface of the center pin;
• the chassis component further comprises:
• a plurality of cross beam components provided between the two lower boundary beams, the plurality of cross beam components being provided at an interval along a length direction of each of the two lower boundary beams, at least one of the two lower boundary beams being provided with a connecting seat, and at least one end of each of the plurality of cross beam components being connected with a corresponding lower boundary beam in the two lower boundary beams through the connecting seat;
• wherein each of the two lower boundary beams comprises a first flat plate, a vertical plate and a second flat plate connected in sequence, a width size L1 of the first flat plate is greater than a width size L2 of the second flat plate, and the connecting seat comprises:
• a first connecting plate, connected with the vertical plate;
• a second connecting plate, forming an included angle with the first connecting plate, the second connecting plate being connected with a corresponding cross beam component in the plurality of cross beam components;
• and
• a third connecting plate, forming an included angle with the first connecting plate and the second connecting plate respectively, the third connecting plate being connected with the first flat plate or the second flat plate.