Patent ID: 8864383

Claim:
An axle box for a railway vehicle bogie having a rolling bearing providing an outer ring element, an inner ring element, rolling elements mounted therebetween such that the inner ring element supports at least one of the rolling elements thereon to allow rolling contact therebetween, and a seal element, the seal element directly contacting the inner ring element, the inner ring element being adapted to be secured by screw bolts to an axial end of bogie axle, the axle box comprising: an end cap having a flange with an inner face and an outer face, a first annular radial surface portion of the inner face being so defined that the first annular radial surface portion is able to lean against and directly contact an axial end of the inner ring element of the rolling bearing to enable direct heat conduction between the inner ring element that supports the at least one of the rolling elements thereon and the end cap, the inner ring element having an outer axially extending surface oriented to face the outer ring element wherein the end cap does not contact the seal element and does not contact the outer axially extending radial surface of the inner ring element, the flange provides a central part traversed by screw bores, wherein the flange has a first inner annular axial ridge running alongside the outer circumference of the cap, extending towards the rolling bearing all around the flange, axially at least as far as the first radial surface portion extends, so as to leave an axial gap between the first inner axial ridge and the outer seal bearing ring of the rolling bearing, the gap is less than or equal to 5 mm.