Self-lubricating gear blank

According to the self-lubricating gear blank, when a gear stops working, residual lubricating oil in the oil groove cannot be discharged, and waste of the lubricating oil is avoided; comprising a gear body, an annular oil groove is formed in the gear body, a plurality of liquid adding openings communicated with the annular oil groove are formed in the side wall of the gear body, the liquid adding openings are in threaded connection with blocking caps, and a plurality of liquid outlet oil channels are evenly distributed in the outer wall of the annular oil groove and comprise oil inlet cavities, connecting cavities and oil outlet cavities which are sequentially connected; a sliding cavity is formed in the end, away from the annular oil groove, of the oil inlet cavity, the side wall of the sliding cavity protrudes inwards to be provided with a limiting table, a sealing plug is slidably connected into the oil inlet cavity and used for sealing the oil inlet, a connecting rod is arranged at the end, away from the