FIELD: railway transport. SUBSTANCE: proposed invention is aimed at provision of possibility of rolling stock running along different gauge tracks. Bogie has two frames, toothed extensible axle arranged between each pair of units of running gear, transfer device with driving gear and toothed rim installed on bogie frame for transmitting traction moment to extensible axle. EFFECT: provision of automatic self-alignment of railway vehicle wheel unit on rail track, reduced wear of wheel flanges. 4 cl, 5 dwg
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