Position degree detection mechanism for inner hole

The utility model discloses a position degree detection mechanism for an inner hole, and relates to the field of inner hole position degree measurement, the position degree detection mechanism comprises a core expansion mechanism, a rotating mechanism, a conduction mechanism and a measurement mechanism, the core expansion mechanism is coaxially arranged in an inner hole of a workpiece to be measured, the rotating mechanism is rotatably connected with the core expansion mechanism, and the rotating mechanism is used for driving the core expansion mechanism to rotate; the conduction mechanism is rotationally connected with the core expansion mechanism, and the measuring mechanism is used for measuring the displacement conducted by the conduction mechanism. Adjustment can be achieved according to inner holes with different hole diameters through the core expanding mechanism, the core expanding mechanism abuts against the surface of the inner hole, the core expanding mechanism can be suitable for the inner holes w