Bearing mounting structure

The bearing mounting structure comprises a seat body and a thrust structure, a mounting hole extending in the vertical direction is formed in the upper end face of the seat body and used for mounting a bearing, a containing groove is formed in the inner wall face of the mounting hole in a concave mode, and the upper side wall face of the containing groove penetrates through the upper end face of the seat body to form an insertion opening; the thrust structure comprises a thrust part and a pressing part, the lower end of the thrust part penetrates through the inserting opening to extend into the containing groove and is used for abutting against the upper end of the bearing outer ring, the upper end of the thrust part is located in the inserting opening and is flush with the upper end face of the base body, and the pressing part is located on the peripheral side of the mounting hole and covers the inserting opening. And a limiting member which can abut against the upper end of the thrust part and limits the po