In the past, most of the wheel hub bearings of cars used single row tapered roller or ball bearings in pairs. With the development of technology, car wheel hub units have been widely used in cars. The range and usage of wheel hub bearing units are increasing day by day, and have now developed to the third generation:
The first generation consisted of double row angular contact bearings.
The second generation has a flange on the outer raceway for fixing the bearing, and the bearing can be simply sleeved on the axle and fixed with a nut. Makes car maintenance easier.
The third-generation wheel hub bearing unit is a combination of the bearing unit and the anti-lock brake system ABS. The hub unit is designed with an inner flange and an outer flange, the inner flange is bolted to the drive shaft, and the outer flange mounts the entire bearing together.
Fourth generation wheel bearing
The fourth-generation wheel hub bearing unit integrates the constant velocity universal joint and the bearing into a whole, which solves the disadvantage of increasing the weight of the wheel hub due to the integrated structure of the wheel hub and the constant velocity universal joint in the prior art. The development of the fourth-generation wheel hub bearing unit has been successful, and it is believed that it will be applied to various types of vehicles on a large scale in the near future. The features of these unit products are: there is no need to adjust the bearing assembly clearance, the bearing assembly process is more reasonable, the weight is reduced and the volume is reduced, and it can be used almost permanently after one-time grease filling, which reduces the overall production cost and is more conducive to large-scale popularization.