Rolling knock out pin structure of oil transport pump of large power high speed diesel engine

The utility model relates to an ejector rod of an oil transfer pump, particularly an ejector rod of an oil transfer pump of a high-power high-speed diesel engine. The utility model comprises a roller carrier, a roller, a guide block and a pin shaft, wherein, one side surface of the roller is also provided with a recess, one end of the pin shaft is provided with a shaft groove, and the shaft groove is sheathed with a spring check ring. The spring check ring is positioned in a roller recess between the bottom surface of the recess of the roller and the corresponding inner side of a roller carrier, the material and the processing accuracy of the ejector rod of the oil transfer pump are reduced, and the cost is reduced.