Taper roller bearing, particularly for railway use
AssigneeRIV-SKF Officine di Villar Perosa S.p.A.
InventorsFranco Colanzi, Bruno Pizzi
Life of this patent
Estimating the term…
Abstract
A taper roller bearing is described which has the particular feature of having the track of the inner ring capable of being inspected, such characteristic is obtained by means of a spacer cage the bridges of which extend both above and below the roller pitch circle identified by the axes of the rollers in such a way as to retain these latter in the pockets of the cage both on the outer ring side and on the inner ring side of the bearing; the cage in the pockets of which the rollers are snap-engageable, is removable together with the rollers of the track of the inner ring, being axially fixed to this latter by snap-engagement.
Claims6
A rolling element bearing (1,40) of a taper roller type, particularly for railway use, comprising:
- an outer ring (2) having an associated inner conical track, an inner ring (4) having an associated outer conical track, a plurality of taper rollers (6) freely disposed between said inner and outer rings and guided between said tracks, and a spacer cage (9) interposed between said inner and outer rings, the spacer cage having a pair of end rings (11, 12) respectively being a larger ring (11) and a smaller ring (12), and a plurality of rectilinear bridges (15) connecting said end rings together and being disposed equidistantly and adjacent along generatrices of a conical surface in such a way as to define, with said end rings, respective pockets (10) for freely housing said taper rollers, and operable to maintain the taper rollers separated from one another and their axes of rotation disposed in a ring along a circumference, said bridges (15) extending both above said circumference in such a way as to retain said rollers (6) in the pockets (10) on a side of the bearing toward the outer ring (2), and beneath said circumference, in such a way as to retain said rollers (6) in the pockets on a side of the bearing toward the inner ring (4) also, and said pockets (10) being adapted to receive and snap-engage said rollers, wherein said cage (9) is made of resiliently deformable synthetic plastic material and wherein said inner ring (4) of the bearing is provided with a conventional shoulder (18) for said rollers (6) on a side adjacent said larger end ring (11) of the cage and with means (21, 41) for axially snap-engaging said cage (9) with the rollers (6) therein to said inner ring (4) on a side adjacent said smaller end ring (12) of the cage, said smaller end ring (12) being provided with respective frontal cavities (25) formed in correspondence with each said pocket (10) on a base of said smaller end ring (12) opposite that directed towards each said roller (6) and said larger end ring (11) being of smaller thickness than the smaller ring (12) so that said cage (9) is made resiliently deformable in a circumferential sense.
Dependencies are inferred from the claim text.