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US 10,604,167 B2Granted
Axlebox for a railway vehicle bogie and railway bogie equipped with such an axlebox
AssigneeAktiebolaget Skf
InventorsLudovic Fenayon, Thierry Le Moigne
Life of this patent
Estimating the term…
Abstract
An axlebox of railway vehicle bogie comprising a housing, a front cover fixed to a front side of the housing, a rear cover fixed to a rear side of the housing, a cylindrical roller bearing unit, an end cap and a backing ring. A rear chamber and a front chamber on both axial sides of the sealed bearing unit are in fluidic connection through a bypass system.
Claims12
An axlebox of railway vehicle bogie comprising:
- a housing;
- a cylindrical roller bearing unit having a stationary outer ring mounted in a bore of the housing, a rotating inner ring dedicated to be fixed to an axial end of a rotating bogie axle, an annular rolling chamber radially defined between the inner ring and the outer ring, the rolling chamber being axially closed by sealing arrangement, and at least one row of cylindrical rollers mounted in the rolling chamber radially between the inner ring and the outer ring and axially between a front sealing arrangement and a rear sealing arrangement, the inner ring comprising two steps able to axially block the rollers, such as the axial length between the two steps is larger than the rollers axial length to allow relative axial displacement of the rollers with respect to the inner ring;
- an end cap fixed to the rotating bogie axle and having a radial flange defined to axially contact a front end of the inner ring of the bearing unit;
- an annular backing ring axially mounted between a step of the bogie axle and a rear end of the inner ring of the bearing unit;
- a front cover fixed to a front side of the housing and comprising a cover portion with an annular axial flange defined to axially contact a front end of the outer ring of the bearing unit, the axial flange being mounted in the bore of the housing;
- a rear cover fixed to a rear side of the housing and comprising an annular axial flange defined to axially contact a rear end of the outer ring of the bearing unit, the axial flange being mounted in the bore of the housing;
- an annular front chamber defined between the bearing unit, a portion of the radial flange of the end cap, and the axial flange of the front cover, the front chamber being able to receive a portion of the bearing unit, in case of relative axial displacement between the bogie axle and the housing in a first axial direction;
- an annular rear chamber defined between the bearing unit, a radial portion of the backing ring, and the axial flange of the rear cover, the rear chamber being able to receive a portion of the bearing unit, in case of relative axial displacement between the bogie axle and the housing in a second axial direction;
- the housing comprises at least one through channel with a first opening in the bore of housing beyond a front end of the outer ring and a second opening in the bore of housing beyond a rear end of the outer ring;
- at least one radial through hole extending through the axial flange of the front cover;
- and
- at least one radial through hole extending through the axial flange of the rear cover,
- wherein the rear chamber and the front chamber are in fluidic connection through the at least one radial through hole of the rear cover, the at least one channel of the housing, and the at least one radial through hole of the front cover.
10 more elements
A Railway bogie comprising:
- a bogie frame;
- a wheel set having rotatable bogie axles;
- and
- at least one axlebox, each axlebox comprising:
- a housing;
- a cylindrical roller bearing unit having a stationary outer ring mounted in a bore of the housing, a rotating inner ring dedicated to be fixed to an axial end of a rotating bogie axle, an annular rolling chamber radially defined between the inner ring and the outer ring, the rolling chamber being axially closed by sealing arrangement, and at least one row of cylindrical rollers mounted in the rolling chamber radially between the inner ring and the outer ring and axially between a front sealing arrangement and a rear sealing arrangement, the inner ring comprising two steps able to axially block the rollers, such as the axial length between the two steps is larger than the rollers axial length to allow relative axial displacement of the rollers with respect to the inner ring;
- an end cap fixed to the rotating bogie axle and having a radial flange defined to axially contact a front end of the inner ring of the bearing unit,
- an annular backing ring axially mounted between a step of the bogie axle and a rear end of the inner ring of the bearing unit;
- a front cover fixed to a front side of the housing and comprising a cover portion with an annular axial flange defined to axially contact a front end of the outer ring of the bearing unit, the axial flange being mounted in the bore of the housing;
- a rear cover fixed to a rear side of the housing and comprising an annular axial flange defined to axially contact a rear end of the outer ring of the bearing unit, the axial flange being mounted in the bore of the housing;
- an annular front chamber defined between the bearing unit, a portion of the radial flange of the end cap, and the axial flange of the front cover, the front chamber being able to receive a portion of the bearing unit, in case of relative axial displacement between the bogie axle and the housing in a first axial direction;
- an annular rear chamber defined between the bearing unit, a radial portion of the backing ring, and the axial flange of the rear cover, the rear chamber being able to receive a portion of the bearing unit, in case of relative axial displacement between the bogie axle and the housing in a second axial direction;
- the housing comprises at least one through channel with a first opening in the bore of housing beyond a front end of the outer ring and a second opening in the bore of housing beyond a rear end of the outer ring;
- at least one radial through hole extending through the axial flange of the front cover;
- and
- at least one radial through hole extending through the axial flange of the rear cover,
- wherein the rear chamber and the front chamber are in fluidic connection through the at least one radial through hole of the rear cover, the at least one channel of the housing, and the at least one radial through hole of the front cover,
- the at least one axlebox supporting, in rotation, an axial end of at least one of the bogie axles;
- and
- at least one suspension mounted between the axlebox and the bogie frame.
17 more elements
Dependencies are inferred from the claim text.