As the core component of modern automotive chassis, the third-generation wheel hub bearings have achieved technological breakthroughs in load-bearing, transmission, guidance, and intelligent integration. Their functions can be summarized into the following four dimensions:
1. Core load-bearing and mechanical support
Dynamic load bearing
The third-generation wheel hub bearing unit can withstand a maximum dynamic load of 2.5 tons, while also dealing with the vertical weight (radial load) and lateral force (axial load) generated by steering/tilting of the vehicle. For example, during high-speed driving, bearings need to stably support the weight of the vehicle and withstand the lateral friction between the tires and the ground during sharp turns to prevent wheel hub displacement or deformation.
Structural Strength Optimization
By integrating the installation core shaft with the inner ring of the bearing and assembling it with the outer flange into a compact unit, the strength of the third-generation bearing has been significantly improved.
. Its multi-layer sealing structure can prevent sediment and moisture from entering, ensuring reliability in extreme road conditions such as wading and muddy roads, and extending its service life to over 100000 kilometers.II. Efficient Transmission and Energy Transfer
Non destructive Power Transmission
The third-generation bearings connect the drive shaft and wheels to achieve efficient power transmission.
. Models equipped with fourth generation self-lubricating bearings can improve transmission efficiency by 0.8% -1.2%, especially in new energy vehicles. This optimization can directly reduce power consumption and extend driving range.Low friction design
Adopting precision machined raceway and cage system (tolerance controlled within 0.005mm), combined with new materials such as ceramic ball bearings, the rolling resistance is reduced by 18% compared to traditional steel bearings.
. This not only reduces energy loss, but also improves tire ground stability and enhances handling.III. Precise Guidance and Motion Control
Steering Accuracy Guarantee
The third-generation bearings are manufactured with high precision (wheel hub steering accuracy ± 0.1 °) to ensure that the vehicle runs along the predetermined trajectory during steering, avoiding deviation or abnormal tire wear.
. For example, precise guidance control can improve vehicle stability and reduce the risk of rollover during high-speed driving. Vibration and noise suppressionBy optimizing the sealing structure and materials (such as polytetrafluoroethylene low friction layer), the operating noise of the bearing is reduced to below 40dB, and the vibration acceleration is ≤ 2.5m/s ², significantly improving driving comfort.
.Fourth, intelligent integration and safety upgrade
Deep integration of ABS system
The third generation bearings generally integrate speed sensors, with a digital signal sampling rate of 1000Hz, ensuring that the anti lock braking system (ABS) can complete braking intervention within 2ms.
. When the bearing wear reaches 0.3mm, the system can generate a characteristic abnormal noise of 400-1200Hz, warning the fault 2000 kilometers in advance, which is 70% more efficient than traditional detection methods.Easy installation and reduced maintenance costs
The integrated design reduces the number of assembly components, shortens installation time by 30%, and lowers the skill requirements for installation personnel.
. At the same time, sealed bearings can be preloaded with lubricating grease, achieving maintenance free operation and reducing full lifecycle costs.