Axle box for a railway vehicle

Abstract

An axle box for a railway vehicle including a casing provided with a through-bore extending along a median axis, a journal unit accommodated in the bore, a front cover, and a rear cover. At least one part of the front and rear cylindrical parts of the front and rear covers, respectively, having a threaded exterior surface screwed into a tapped portion of the central bore of the casing.

1 . An axle box for a railway vehicle comprising:
 a casing provided with a through-bore extending along a median axis,   a journal unit accommodated in the bore,   a front cover having a front cylindrical part extending axially in the bore of the casing on the median axis and immobilizing the journal unit in a first axial direction, and a front annular flange extending radially outwards and fastened securely to a front surface of the casing, and   a rear cover having a rear cylindrical part extending axially in the bore of the casing on the median axis and immobilizing the journal unit in a second axial direction, wherein   at least one part of the front and rear cylindrical parts of the front and rear covers, respectively, comprises a threaded exterior surface screwed into a tapped portion of the central bore of the casing.   
     
     
         2 . The axle box according to  claim 1 , wherein the rear cover comprises a rear annular flange distinct from the rear cylindrical part. 
     
     
         3 . The axle box according to  claim 1 , wherein the front cylindrical part of the front cover is distinct from the front annular flange. 
     
     
         4 . The axle box according to  claim 3 , wherein the front annular flange comprises an annular groove that receives the front cylindrical part. 
     
     
         5 . The axle box according to  claim 1 , wherein the cover with a screwed cylindrical part comprises a means for interaction with a tool so that it can be screwed into the casing. 
     
     
         6 . The axle box according to  claim 5 , wherein the means for interaction comprises at least one hollowed zone provided on the screwed part. 
     
     
         7 . The axle box according to  claim 1 , wherein the cover with the screwed cylindrical part comprises at least one through-opening axially receiving a fastening stud, the fastening stud having its end projecting and being received in a corresponding hollowed zone provided on the casing. 
     
     
         8 . The axle box according to  claim 7 , wherein the fastening stud has a threaded exterior surface and is screwed into an inside thread provided on an interior surface of the through-opening of the screwed part. 
     
     
         9 . The axle box according to  claim 7 , wherein the end of the fastening stud received in the hollowed zone of the casing has a conical form. 
     
     
         10 . The axle box according to  claim 7 , wherein the end of the fastening stud has a radial length strictly greater than the radial length of the hollowed zone of the casing in which it is received.