Crankshaft with self-lubricating structure

The crankshaft with the self-lubricating structure comprises a crankshaft body, the crankshaft body comprises a left connecting rod shaft and a right connecting rod shaft, crank plates are fixedly arranged at the two ends of each connecting rod shaft, the corresponding crank plates of the left connecting rod shaft and the right connecting rod shaft are fixedly connected through a main shaft, a left end shaft is fixedly arranged on the left side of the leftmost crank plate, and a right end shaft is fixedly arranged on the right side of the leftmost crank plate. Balancing weights are arranged at the ends, away from the connecting rod shaft, of the leftmost crank plate, the left crank plate and the right crank plate correspondingly, oil injection holes are formed in the inner sides of the left end shaft and the right end shaft correspondingly, and the oil injection holes communicate with oil guide grooves in the crank plates; an oil distribution hole communicated with the oil guide groove is formed in the center