Universal joint bearing with dustproof sealing structure

The invention relates to the technical field of bearing sealing, in particular to a universal joint bearing with a dustproof sealing structure. Wherein the dustproof cover and the shaft sleeve are both arranged on the shaft neck in a sleeving mode, and the dustproof cover, the shaft sleeve and the shaft neck jointly define a sealing cavity; the oil seal is mounted in the sealing cavity and is in interference fit with the shaft neck; an opening of the assembling groove is located in the end face of the shaft sleeve. In the direction parallel to the axis of the shaft neck, the first end of the dust cover is in interference fit with the shaft neck, and the second end of the dust cover is embedded in the assembling groove and is in interference fit with the side wall face of the assembling groove. Therefore, the problems that the matching position of the existing dust cover and the shaft sleeve is unilateral contact, the path of muddy water intruding into the bearing is simple, and the sealing reliability is low