Sealing unit for rolling-element bearings

摘要

Sealing unit adapted to be coupled to a rolling-element bearing to seal off the annular space between an inner ring and an outer ring of the bearing, the sealing unit having a stiffening core, and an elastomeric annular element that is rigidly secured to the stiffening core and provided with a sealing lip and a root portion, which is positioned radially on the opposite side of the sealing lip, and which can be snap-fitted into a groove of the outer ring in order to abut the root portion on a front wall of the groove with the core facing toward the outside of bearing.

主权项

1. A sealing unit for rolling-element bearings comprising:
an inner ring and an outer ring, the outer ring having at least one groove formed on an inside surface with a front wall that is inclined with respect to an axis of rotation of the unit, which sealing unit can be coupled to the rolling-element bearing to seal off an annular space provided between the inner ring and the outer ring and comprises a stiffening core and an elastomeric annular element that is rigidly secured to the stiffening core and that in turn comprises: a sealing lip extending radially outwards from the stiffening core towards the axis so as to be in frictional contact with the inner ring; and a root portion, positioned radially on the opposite side to the sealing lip, which can be snap-fitted into the groove; wherein, when the sealing unit is coupled to the bearing, the root portion is in a position axially internal to the stiffening core and can press directly against the front wall of the groove, and wherein the root portion is axially delimited by a large front surface that is inclined with respect to the axis, the large front surface being in direct contact in use with the front wall of the groove, and the root portion further comprising an annular groove made in the large front surface.