Engine end cover integrated oil pump assembly

An engine end cover integrated oil pump assembly, comprising an engine end cover and an oil pump, the oil pump comprising a pump body, an oil pump shaft and an oil pump driving gear, the pump body being integrated with the engine end cover, the oil pump driving gear being connected to the oil pump shaft, and the engine end cover being provided with an end cover through-hole allowing an engine crankshaft to penetrate through, wherein the engine end cover integrated oil pump assembly comprises a crankshaft driving gear and a crankshaft driving gear retaining structure;

• the crankshaft driving gear is rotatably arranged on the engine end cover and externally meshes with the oil pump driving gear;
• the crankshaft driving gear is provided with a shaft hole allowing the engine crankshaft to penetrate through, the shaft hole exactly faces the end cover through-hole, and the crankshaft driving gear is provided with a shaft connection structure, which is used for connecting the engine crankshaft to enable the crankshaft driving gear to rotate synchronously with the engine crankshaft;
• the crankshaft driving gear retaining structure is used for retaining the crankshaft driving gear on the engine end cover to prevent the crankshaft driving gear from falling off from the engine end cover.