Improved outer spherical roller bearing

The utility model provides an improved roller bearing with an outer spherical surface, which belongs to the technical field of bearings and aims to solve the problem that normal operation of the bearing is easily affected by position change of a dustproof cover when the outer side of the dustproof cover in the conventional roller bearing is wound by foreign matters or impacted by larger external force. The bearing inner ring is rotationally connected to the inner side of the bearing outer ring; the plurality of rollers are symmetrically and uniformly arranged front and back and are rotationally connected to the inner sides of the bearing outer ring and the bearing inner ring; the two retainers are symmetrically arranged on the outer sides of the rollers front and back; the mounting auxiliary structure is arranged on the outer side of the inner end of the bearing inner ring; the dustproof auxiliary structures are arranged on the front and rear sides of the bearing outer ring and the bearing inner ring; the fir