Sliding pair anti-falling and oil sealing structure and transmission shaft applying same

The utility model relates to an anti-falling and oil seal structure of a sliding pair and a transmission shaft applying the same. The anti-falling and oil seal structure comprises a spline shaft fork, a spline housing, a flange nut and an oil seal, the spline sleeve comprises a connecting part and a locking part, the connecting part is installed on the spline shaft yoke, and an oil seal groove is formed in the inner side wall of the connecting part at the joint of the connecting part and the locking part and used for installing the oil seal; the oil seal sleeves the spline shaft yoke and is in interference fit with the spline shaft yoke; and in the locking part, the flange nut is in threaded connection with the tail end of the spline shaft yoke. The anti-falling purpose is achieved through matching of the flange nut and the oil seal, and the oil sealing purpose is achieved through interference fit of the oil seal and the spline shaft yoke. 本实用新型涉及一种滑动副防脱和油封结构以及应用此结构的传动轴，所述防脱和油封结构包括花键轴叉、花键套、法兰螺母和油封；所述花键套包括连接部和