Automobile Hub Bearing

Hub bearing unit ball bearing is developed on the basis of standard angular contact ball bearings and tapered roller bearings, it will be two sets of bearings as one, with good assembly performance, can be omitted clearance adjustment, light weight, compact structure, large load capacity, for sealing bearings can be loaded in advance grease, omit the external hub seal and free from maintenance and other advantages, has been widely used in cars, There is also a trend of gradual expansion of applications in heavy-duty vehicles.

1. Fold high-performance sealing ring

Because the hub bearing is very close to the ground and the high-temperature brake disc and other parts, it is necessary to adapt to various complex road conditions and harsh driving environment. Therefore, the bearing sealing ring must have good anti-leakage performance, and it must also have good heat resistance, mud resistance and sewage performance.

2. Folding and rolling technology

The third generation of hub bearings generally use rolling rolling technology to self-lock the half inner ring. When the rolling rolling technology is used, the axial load causes plastic deformation of the hub spindle end, so that the hub spindle and the half inner ring are connected as one. Compared with the traditional nut fastening, the third generation of wheel bearings using rolling technology helps to reduce the volume and weight, while reducing the cost and improving the reliability of wheel bearings. At the same time, the step of adjusting the position of internal components is eliminated when assembling the car.

3. Light folding and miniaturization

The second and third generation of wheel bearing structure design should be carried out finite element analysis, in order to ensure that the flange has enough rigidity while reducing its volume and weight as much as possible, of which the rigidity of the third generation of wheel bearing is the inclination Angle of the wheel flange relative to the outer ring flange. Through integrated and miniaturized design to reduce the weight of the axle, the second generation of hub bearings has reduced the weight of the first generation by 180g, while the third generation of hub bearings has further reduced the weight of 120g.

4. Fold low friction torque

The important measure to reduce automobile fuel consumption is to design low friction torque hub bearings, and the main factors affecting the bearing friction torque is the type of bearing and preload, and the bearing seal accounted for a large proportion of the friction torque components. Therefore, improving the seal design to reduce the friction torque can significantly improve the performance of hub bearings. Hub bearings have been developed from the first generation to the latest fourth generation, and the friction torque has been gradually reduced.

5. Folding ABS technology

ABS is a kind of automobile safety control device with the advantages of anti-skid and anti-lock, which can automatically adjust the braking force to prevent wheel lock and shorten the braking distance by detecting the wheel speed during emergency braking. The speed is detected by magnetic sensors mounted on parts that rotate with the wheel and nearby fixed to the body of the car. The hub unit with ABS sensor is divided into two cases: one is placed inside the hub, and the sensor is installed on other parts; The other is placed inside the hub together with the sensor (called the hub unit with sensor).