Backing ring assembly for railway axles
AssigneeAktiebolaget Skf
InventorsAndrea Long, Giorgia D'Amico, Giuseppe Guala
Life of this patent
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Abstract
A support ring assembly for a railway axle having a support ring configured to be inserted between a rolling bearing and a collar of the railway axle, the support ring having an annular seat, a surface of a radially inner side wall fitted with a radial clearance over the collar and an end wall that abuts against the collar, an annular insert fitted into the seat by means of an annular shield and having an elastomeric annular element having at least two annular protuberances that engage with the collar, the annular element configured to engage with the collar so as to occupy the radial clearance.
Claims20
A support ring assembly for a railway axle configured to be coupled, during use, on a shaft end of the railway axle and to act as a shoulder for a rolling bearing mounted on the shaft end, the support ring assembly comprising:
- a support ring configured to be coupled, during use, in an axially abutting manner between the rolling bearing and a collar of the railway axle, the support ring comprising:
- a first axial end provided radially on an inside of a first annular cup-shaped seat,
- wherein, the first annular cup-shaped seat is defined by a side wall surface of the support ring facing radially inward and by a flat annular end wall,
- wherein, the side wall surface and the collar define between them a radial clearance (G) when fitted during use, and
- wherein, the annular end wall is configured to come into axial abutment with the collar during use;
- an annular insert interference-fitted into the first seat, the annular insert comprising:
- a substantially rigid annular shield engaged integrally inside the first seat in contact with the support ring and configured to remain out of contact with the collar;
- and
- an annular element made of an elastomeric material configured to be mounted integrally as one piece on the annular shield at least partially radially on an inside of the annular shield,
- wherein, the annular element is configured to be interposed during use between the annular shield and a radially external side surface of the collar and to engage with the collar, so as to occupy the radial clearance (G), and
- wherein, the annular element provides a static hydraulic sealing action to the support ring assembly.
A support ring assembly for a railway axle configured to be coupled, during use, on a shaft end of the railway axle and to act as a shoulder for a rolling bearing mounted on the shaft end, the support ring assembly comprising:
- a support ring configured to be coupled, during use, in an axially abutting manner between the rolling bearing and a collar of the railway axle, the support ring comprising:
- a first axial end provided radially on an inside of a first annular cup-shaped seat,
- wherein, the first annular cup-shaped seat is defined by a side wall surface of the support ring facing radially inward and by a flat annular end wall,
- wherein, the side wall surface and the collar define between them a radial clearance (G) when fitted during use, and
- wherein, the annular end wall is configured to come into axial abutment with the collar during use;
- an annular insert interference-fitted into the first seat, the annular insert comprising:
- a substantially rigid annular shield engaged integrally inside the first seat;
- and
- an annular element made of an elastomeric material configured to be mounted integrally as one piece on the annular shield at least partially radially on an inside of the annular shield,
- wherein, the annular element is configured to be interposed during use between the annular shield and a radially external side surface of the collar and to engage with the collar, so as to occupy the radial clearance (G), and
- wherein, the annular element provides a static hydraulic sealing action to the support ring assembly,
- wherein the annular shield is made of a metal sheet and comprises:
- a sleeve portion force fitted inside the first seat and engaged in contact with the side wall surface of the first seat;
- and
- a flange portion extending radially in a cantilever fashion and an outside of the sleeve portion at a first end of the support ring,
- wherein the flange portion is engaged in axial abutment against a first axial face of the first end of the support ring.
A support ring assembly for a railway axle configured to be coupled, during use, on a shaft end of the railway axle and to act as a shoulder for a rolling bearing mounted on the shaft end, the support ring assembly comprising:
- a support ring configured to be coupled, during use, in an axially abutting manner between the rolling bearing and a collar of the railway axle, the support ring comprising:
- a first axial end provided radially on an inside of a first annular cup-shaped seat,
- wherein, the first annular cup-shaped seat is defined by a side wall surface of the support ring facing radially inward and by a flat annular end wall,
- wherein, the side wall surface and the collar define between them a radial clearance (G) when fitted during use, and
- wherein, the annular end wall is configured to come into axial abutment with the collar during use;
- an annular insert interference-fitted into the first seat, the annular insert comprising:
- a substantially rigid annular shield engaged integrally inside the first seat;
- and
- an annular element made of an elastomeric material configured to be mounted integrally as one piece on the annular shield at least partially radially on an inside of the annular shield,
- wherein, the annular element is configured to be interposed during use between the annular shield and a radially external side surface of the collar and to engage with the collar, so as to occupy the radial clearance (G), and
- wherein, the annular element provides a static hydraulic sealing action to the support ring assembly,
- wherein the support ring further comprises:
- a flanged second axial end axially opposite the first end, extending radially on an outside of a radially outer side surface of the first axial end, the second axial end comprising:
- a second annular seat defined by an annular front groove;
- and
- an annular spacer made of a synthetic plastic material having a substantially Z-shaped radial cross-section and a radially outer edge,
- wherein the radially outer edge snap engages inside the second annular seat and is configured to remain interposed between the support ring and the rolling bearing.
Dependencies are inferred from the claim text.