Blocking end cap for a rolling bearing and supporting device for a railway axle equipped therewith
AssigneeAktiebolaget Skf
InventorMarco Giovanni Francesco Capozzi
Life of this patent
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Abstract
A blocking end cap for a rolling bearing in a railway axle box of a supporting device for a railway axle is provided. The cap is shaped as a concave disc delimited by an annular side wall having a symmetry axis (A), a bottom wall arranged transversely to the symmetry axis (A), and an elbow-shaped, annular joining portion, connecting the bottom wall to the side wall. The thickness of the bottom wall measured in a direction parallel to the symmetry axis (A) is continuously variable in the radial direction between a maximum (S1) situated at the symmetry axis (A) and a minimum (S2) arranged at a radially outer edge of the cap defined by the side wall.
Claims11
A blocking end cap for a rolling bearing for installation in a railway axle box of a supporting device for a railway axle, the cap being shaped as a concave disc delimited by an annular side wall having a symmetry axis (A) coaxial, to a symmetry axis (B) of the bearing, by a bottom wall arranged transversely to the symmetry axis (A), and by an elbow-shaped, annular joining portion, connecting the bottom wall to the side wall;
- the bottom wall being provided with a plurality of through holes for respective screws for fastening, the cap to the axle, and the side wall further comprises a frontal annular surface that faces away from the bottom wall and toward the rolling bearing, the frontal annular surface being spaced from the bottom wall, the frontal annular surface further adapted to abut against a ring of the bearing;
- wherein
- i) the thickness of the bottom wall measured in a direction parallel to the symmetry axis (A) is continuously variable in the radial direction between a maximum (S1) situated at the symmetry axis (A) and a minimum (S2) arranged at a radially outer edge of the cap defined by the side wall;
- ii) flat bulges are obtained on the bottom wall, only at the through holes thereof, and on an outer frontal surface thereof, which bulges provide thickenings of the cap adapted to receive respective heads of the fastening screws in abutting manner.
A supporting device of a railway axle comprising at least one railway axle box comprising, in turn, a rolling bearing fitted on a smaller diameter end or axle journal of the axle, the inner ring of the rolling bearing being fitted axially blocked on the axle journal of the axle between a shoulder integrally carried by the axle and a blocking end cap shaped as a concave disc delimited by an annular side wall having a symmetry axis (A) coaxial to a symmetry axis (B) of the bearing, by a bottom wall arranged transversely to the symmetry axis, and by an elbow-shaped annular joining portion connecting the bottom wall to the side wall;
- the bottom wall being provided with a plurality of through holes for respective screws for fastening the cap to the axle, and the side wall further comprises a frontal annular surface that faces away from the bottom wall and toward the rolling bearing, the frontal annular surface being spaced from the bottom wall, the frontal annular surface further cooperates in abutment against an inner ring of the bearing;
- characterized in that the thickness of the bottom wall of the cap, measured in a direction parallel to the symmetry axis (A), is continuously variable in the radial direction between a maximum (S1) situated at the symmetry axis and a minimum (S2) arranged at a radially outer edge of the cap defined by the side wall.
Dependencies are inferred from the claim text.