Bearing ring inner diameter measuring mechanism

The utility model discloses a mechanism for measuring the inner diameter of a bearing ring, and relates to the technical field of bearing production. The bearing comprises a bearing body, an inner diameter dial indicator is arranged on the inner side of the bearing body, a positioning assembly is arranged outside the bearing body, and an installation assembly is arranged on the outer side of the positioning assembly. Concentric-square-shaped pipes are fixed to the four side walls of the inner side of the positioning box, elastic pieces are arranged outside the concentric-square-shaped pipes, rectangular blocks are arranged inside the concentric-square-shaped pipes, and positioning plates are fixed to the inner ends of the rectangular blocks; a second electric push rod is fixed to the right wall of the mounting block, and a first electric push rod is fixed to the upper wall of the mounting block. The bearing body can be mounted by operating the bearing body to be positioned among the four positioning plates an