Bearing inner sleeve dismounting device

The utility model belongs to the technical field of maintenance tools, and particularly relates to a bearing inner sleeve dismounting device, a worker can hold a limiting bolt by hand to screw two groups of chucks through a thread groove, and the limiting bolt can adjust the size of the two groups of chucks after combination so as to adapt to a bearing inner sleeve. The bearing inner sleeve on the inner side can be clamped and fixed under the clamping of the chuck, so that the subsequent heating and dismounting operation is facilitated; in the heating process, the heating ring is attached to the surface of the chuck, so that the chuck and the bearing inner sleeve on the inner side are fully heated, through interference fit between the bearing inner sleeve and the shaft, the bearing inner sleeve is fully heated and expanded, the bearing inner sleeve is fully embedded into a clamping groove of the chuck, and after the set heating temperature is reached and the temperature is reduced, the limiting bolt is disass