The main function of a hub bearing is to bear weight and provide precise guidance for the rotation of the hub. It bears both axial and radial loads and is a very important component. Traditional automotive wheel bearings are composed of two sets of tapered roller bearings or ball bearings. The installation, oiling, sealing, and adjustment of clearance of the bearings are all carried out on the automotive production line. This structure makes it difficult to assemble in automotive production plants, costly, and has poor reliability. Moreover, when the car is maintained at a repair point, the bearings need to be cleaned, oiled, and adjusted. The hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings. It integrates two sets of bearings into one, with good assembly performance, omitting clearance adjustment, light weight, compact structure, large load capacity, and pre-installed sealed bearings
