Joint bearing sealing structure

The utility model relates to a knuckle bearing sealing structure. The sealing structure comprises a bearing outer ring and a bearing inner ring, a sealing ring is located between the bearing outer ring and the bearing inner ring, the sealing ring is an elastic nonmetal circular ring sheet, a sealing groove corresponding to the sealing ring is formed in the inner side of the bearing outer ring, theouter edge of the sealing ring is embedded into the sealing groove, and the inner edge of the sealing ring is in spherical elastic contact with the inner ring. According to the utility model, along with the rotation of the bearing, the sealing ring slides relative to the spherical surface of the inner ring to generate abrasion, the contact area of the sealing ring and the spherical surface of theinner ring is continuously increased, and the sealing effect is gradually optimal; and meanwhile, the sealing ring is firmly fixed in the sealing groove, so that the sealing structure is simple and compact, the sealing ring i