Bearing inner ring diameter detection mechanism and detection method thereof

The invention discloses a bearing inner ring diameter detection mechanism and a detection method thereof, and belongs to the technical field of bearing inner ring detection. The bearing inner ring diameter detection mechanism comprises an operating desk, a lifting component and a detection component, wherein the detection component is fixedly mounted below the lifting component; the operating desk is connected with the lifting component and the detection component respectively through signal lines; the detection component comprises an X-direction detection component and a Y-direction detection component; the X-direction detection component and the Y-direction detection component comprise displacement sensors, measuring frames, actuating air cylinders and measuring claws; the measuring claws are mounted below the measuring frames; the displacement sensors and the actuating air cylinders are mounted in the middles of the measuring frames; the actuating air cylinders act on elastic blocks of the measuring frames to control opening and closing of the measuring claws; and the displacement sensors measure deformation and displacement of the elastic blocks of the measuring frames in real time. The detection mechanism adopts inductive measurement, and is not interfered by an external environment easily, and the diameter size, the roundness and the taper of bearing inner rings can be measured quickly and accurately.