# US 9,434,394 B2 · Axlebox assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,434,394 B2 - Document ID: US9434394B2 - Status: Granted - Kind: B2 - Application number: 14/244,453 - Filed: 2014-04-03 - Published: 2015-10-08 - Granted: 2016-09-06 - Earliest claimed: 2013-04-03 - Assignees: Aktiebolaget Skf - Applicants: Thierry Le Moigne; Arnaud Turmeau - Inventors: Thierry Le Moigne; Arnaud Turmeau - Web page: https://patentgrep.com/patent/US9434394B2 ## CPC - B61F 5/28: Axle-boxes integral with, or directly secured to, vehicle or bogie underframes - B61F 15/20: Details - B61F 15/22: Sealing means preventing entrance of dust or leakage of oil - F16C 35/063: Fixing them on the shaft (with interposition of an element F16C35/07) - F16C 2326/10: Railway vehicles - B61F: RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES (for vehicles in general B60; axles or wheels B60B; vehicle tyres B60C) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract An axlebox assembly having at least one rolling bearing designed to be mounted on an axle, and a cover designed to be fastened with the axle such as to axially maintain the at least one rolling bearing between the cover and an abutment of the axle is provided. A backing ring is mounted on the axle between the at least one rolling bearing and the abutment. The backing ring includes a deformable portion so as to substantially fit the shape of the abutment of the axle. ## Claims ### Claim 1 An axlebox assembly comprising: at least one rolling bearing designed to be mounted on an axle, a cover designed to be fastened with the axle such as to axially maintain the at least one rolling bearing between the cover and an abutment of the axle, and a backing ring mounted on the axle between the at least one rolling bearing and the abutment, wherein the backing ring provides a deformable portion including an annular groove that fits the shape of the abutment of the axle. ### Claim 2 (depends on 1) The axlebox assembly according to claim 1, wherein the deformable portion of the backing ring is made of an elastic material. ### Claim 3 (depends on 2) The axlebox assembly according to claim 2, wherein the backing ring further comprises a main body made of a metallic material and the deformable portion made of an elastic material and fastened to the said main body. ### Claim 4 (depends on 1) The axlebox assembly according to claim 1, wherein the deformable portion further comprises a rim radially inwardly extending and in contact with the abutment of the axle. ### Claim 5 (depends on 1) The axlebox assembly according to claim 1, wherein the annular groove of the deformable portion defines the rim in contact with the abutment of the axle. ### Claim 6 (depends on 5) The axlebox assembly according to claim 5, wherein the rim of the deformable portion extends radially in its free state. ### Claim 7 (depends on 6) The axlebox assembly according to claim 6, wherein an annular elastic ring is inserted in the annular groove of the deformable portion. ### Claim 8 (depends on 7) The axlebox assembly according to claim 7, wherein the inner diameter of the bottom of the annular groove of the deformable portion is strictly smaller than the outer diameter of the abutment of the axle. ### Claim 9 (depends on 8) The axlebox assembly according to claim 8, wherein the main body and the deformable portion of the backing ring are both in contact with the abutment of the axle. ### Claim 10 (depends on 8) The axlebox assembly according to claim 8, wherein the deformable portion is the only component of the backing ring to be in contact with the abutment of the axle. ### Claim 11 (depends on 10) The axlebox assembly according to claim 10, wherein the abutment of the axle is positioned in a shoulder between an axle end having a smaller outer diameter than the adjacent axle portion, the shoulder comprising a radial surface bearing against the backing ring, the radial surface extending radially with a groove of rounded shape on the axle end on which the deformable portion of the backing ring substantially fits. ### Claim 12 (depends on 11) The axlebox assembly according to claim 11, wherein the inner diameter of the bottom of the annular groove of the deformable portion is closer to the diameter of the junction between the radial surface and the groove of the shoulder of the axle than the outer diameter of the shoulder of the axle. ### Claim 13 A railway bogie comprising: an axle, and an axlebox assembly having; at least one rolling bearing designed to be mounted on an axle, a cover designed to be fastened with the axle such as to axially maintain the at least one rolling bearing between the cover and an abutment of the axle, and a backing ring mounted on the axle between the at least one rolling bearing and the abutment, wherein the backing ring provides a deformable portion including an annular groove that fits the shape of the abutment of the axle. ### Claim 14 (depends on 13) The railway bogie of claim 13, wherein the annular groove of the deformable portion defines a rim in contact with the abutment of the axle in a mounted state.