Bearing transportation protection and online replacement type traction motor and electric locomotive

The invention discloses a bearing transportation protection and online replacement type traction motor, and relates to the technical field of rail trains, bearings are arranged at the transmission end and the non-transmission end of a rotating shaft respectively, and the bearings support the two ends of the rotating shaft; the end cover and/or the rotating shaft are/is provided with a cone-frustum-shaped contact inclined plane, and the rotating shaft and/or the end cover are/is provided with an elastic supporting ring; when the two ends of the rotating shaft are supported by the bearings, the elastic supporting ring does not provide support, and the rotating shaft is supported by the bearings and rotates; when the rotating shaft moves towards any end in the axial direction, one of the two elastic supporting rings can make contact with the contact inclined face so as to replace one bearing to provide support, at the moment, the bearing corresponding to the end supported by the elastic supporting rings can be d