Cross shaft universal joint shaft sleeve with closed oil way structure

The utility model relates to a cross shaft universal joint shaft sleeve with a closed oil way structure in the technical field of automobile accessories, which comprises a cross shaft center, shaft heads are fixedly connected to the periphery of the cross shaft center, a shaft sleeve is arranged on the outer surface of each shaft head, an oil injection mechanism is arranged on the inner side of each shaft sleeve, and an auxiliary mechanism is arranged on the inner side of each shaft sleeve. By arranging the oil injection mechanism, in the using process, when the interiors of the shaft sleeve and the shaft head need to be lubricated, a handle is pulled rightwards, the handle moves rightwards to drive a sealing plate to move rightwards through a fixing block, at the moment, oil in an oil cavity enters an oil injection hole through a through hole and then enters the interior of the shaft sleeve through the oil injection hole, and the oil injection mechanism is simple in structure and convenient to use. The unive