BEARING DEVICE FOR AXLE OF RAILWAY VEHICLE

摘要

An axle bearing device (1) includes: an inner ring (4) fixed to an axle (2) of a railway vehicle; an outer ring (5) fixed to a journal box of the railway vehicle; and double row tapered rollers (6) arranged between raceway surfaces (4a) of the inner ring (4) and raceway surfaces (5a) of the outer ring (5). An opening portion between the inner ring (4) and the outer ring (5) is sealed by a labyrinth seal (Ls) including at least one axial labyrinth extending in an axial direction and at least one radial labyrinth extending in a radial direction. At least one of the at least one axial labyrinth and the at least one radial labyrinth which form the labyrinth seal Ls is formed between an outer-ring-side sealing member mounted to the outer ring (5) and the inner ring (4) or between the outer-ring-side sealing member mounted to the outer ring (5) and an inner-ring-side sealing member mounted to the inner ring (4).