BOGIE AND RAIL VEHICLE

A bogie and a rail vehicle. The bogie comprises: an axle (1), wherein the middle of the axle (1) is downwardly recessed to form an accommodation space, and two ends of the axle (1) are symmetrically provided with journals (11); wheels (2) connected to the journals (11) by means of a bearing (4); and a buffer device (3) located in the accommodation space; wherein the buffer device (3) comprises: a primary spring assembly provided on the axle (1); a secondary spring assembly provided on the top of the primary spring assembly; and a slewing ring (35) provided on the top of the secondary spring assembly and used for connected to a vehicle body (7) to transmit a traction or brake force to the vehicle body (7). The flexibility of a vehicle in a turning process can be improved by means of the accommodation space.