Integrated shaft system of photoelectric encoder

The invention relates to the technical field of encoder shaft systems, in particular to an integrated shaft system of a photoelectric encoder, which comprises a main shaft, an integrated bearing shell, a rolling body and a bearing inner ring, and is characterized in that the outer surface of the integrated bearing shell plays a role of a photoelectric encoder shell, and the inner surface of the integrated bearing shell is provided with an inward bulge; the upper surface of the protrusion is used for fixing an assembly which does not rotate along with the main shaft in the photoelectric encoder, the side face of the protrusion abuts against one side of the rolling body, and the other side of the rolling body abuts against the bearing inner ring. The bearing outer ring, the supporting ring and the shell are integrated into a single part, so that the number of parts is effectively reduced, the influence caused by machining error accumulation of a plurality of independent parts is reduced, the requirement for con