Gearbox with bearing configuration for rail vehicle

A gearbox for a rail vehicle, comprising a driving shaft, a driven shaft, a first bearing seat for mounting and fixing the driving shaft, and a second bearing seat for mounting and fixing the driven shaft, the driving shaft drives the driven shaft to rotate through gear transmission;

• characterized in that, the gearbox further comprises:
• a first roller bearing, a ball bearing, a bearing inner retaining ring and a bearing outer retaining ring for drainage, which are arranged between the first bearing seat and the driving shaft;
• wherein, the bearing inner retaining ring and the bearing outer retaining ring are provided between the first roller bearing and the ball bearing along an axial direction of the driving shaft, and a first drainage channel is provided on the bearing outer retaining ring, a second drainage channel is provided on the first bearing seat;
• wherein, lubricating oil can be guided into the first roller bearing and the ball bearing from the outside of the first bearing seat through the second drainage channel and the first drainage channel in sequence;
• wherein the first drainage channel of the bearing outer retaining ring comprises a plurality of drainage holes;
• a shunt groove is also provided on the bearing outer retaining ring, the shunt groove is used to divide the lubricating oil flowing from the second drainage channel into the plurality of drainage holes substantially evenly;
• and
• wherein a third drainage channel is provided on the first bearing seat and extends from an outer ring of the ball bearing, such that the lubricating oil in the first roller bearing and the ball bearing is discharged into the gearbox through the third drainage channel.