Railway vehicle bogie, associated vehicle and axle installation method

Abstract

A bogie for a railway vehicle includes a frame, at least one axle, at least one axle box internally receiving the at least one axle, and a suspension of each axle box on the frame. The suspension includes an arm supporting the axle box and at least one elastic member interposed between the arm and the frame. The frame includes a cavity for receiving each elastic member. The cavity includes an opening and a bottom. An upper end of the elastic member is engaged in the cavity through the opening and bears on the bottom.

What is claimed is: 
     
         1 . A bogie for a railway vehicle, comprising:
 a frame;   at least one axle;   at least one axle box, internally receiving the at least one axle;   a suspension of the or each axle box on the frame;   the suspension comprising:   an arm supporting the axle box; and   at least one elastic member interposed between the arm and the frame;   
       wherein, 
       the frame comprises, for the or each elastic member, a cavity for receiving said elastic member, the cavity comprising an opening and a bottom, an upper end of the elastic member being engaged in the cavity through the opening and bearing on the bottom, and wherein 
       the bogie comprises two elastic members, a first elastic member bearing on a bearing region offset longitudinally forwards with respect to the axle, and a second elastic member bearing on a bearing region offset rearwards with respect to the axle. 
     
     
         2 . A bogie for a railway vehicle according to  claim 1 , wherein the arm comprises at least one bearing region offset longitudinally forwards or rearwards relative to the axle, the at least one elastic member having a lower end bearing on the at least one bearing region. 
     
     
         3 . A bogie for a railway vehicle according to  claim 2 , wherein the bearing region extends vertically between a central axis of the axle and a vertex of the axle box. 
     
     
         4 . A bogie for a railway vehicle according to  claim 1 , wherein the bogie comprises a joint connecting the arm to the frame. 
     
     
         5 . A bogie for a railway vehicle according to  claim 4 , wherein the arm is rotatable relative to the frame about the joint. 
     
     
         6 . A bogie for a railway vehicle according to  claim 1 , wherein the axle box comprises an upper body and a lower body removably connected to the upper body. 
     
     
         7 . A bogie for a railway vehicle according to  claim 6 , wherein the arm defines the upper body. 
     
     
         8 . A bogie for a railway vehicle according to  claim 1 , wherein the frame comprises a hollow spar bounded by a lower wall and an upper wall, the opening being formed in the lower wall and the cavity extending into the hollow spar. 
     
     
         9 . A bogie for a railway vehicle according to  claim 8 , wherein the bottom is vertically upwardly offset from the opening, the bottom being defined by the upper wall. 
     
     
         10 . A railway vehicle comprising at least one bogie according to  claim 1 .