Bearing unit for use on driving shaft of railway vehicle wheel, has movable functional interaction body engaging with fixed functional interaction body to form functional clearance to restrict passage of lubricating and outer material

摘要

The bearing unit (10) has a sealing unit (22) comprising a movable sealing element (26) maintained against a movable rotating ring (16RoT). The sealing element includes a movable functional interaction body (36) secured to a spacer (28) and an elastic sealing ring (34). The interaction body engages with a fixed functional interaction body (38) of a fixed sealing element (24) so as to form a functional clearance (44) to restrict a passage of lubricating material and outer material between the movable and fixed sealing elements.