Patent ID: 8327772

Claim:
A low-floor railway vehicle bogie comprising: a bogie frame configured to support a car body of a railway vehicle through air springs, the car body having a space including, a passenger cabin and a driver cabin; a main axle and a sub-axle which are disposed at front and rear sides of the bogie frame in a driving direction, respectively such that the main axle and the sub-axle extend in a rightward and leftward direction; wheels attached to right and left sides of each of the main axle and the sub-axle; axle boxes which are respectively mounted to right and left sides of each of the main axle and the sub-axle and are configured to support the main axle and the sub-axle; and axle box suspensions which are configured to elastically couple the axle boxes to the bogie frame to support the axle boxes, respectively; wherein the wheels attached to the main axle are large-diameter wheels and the wheels attached to the sub-axle are small-diameter wheels which have a smaller outer diameter than the large-diameter wheels; wherein an upper end of each of the small-diameter wheels is set lower than a rotational center of each of the large-diameter wheels; and wherein the small-diameter wheels are positioned under the passenger cabin, and the large-diameter wheels and the air springs are positioned under the driver cabin.