The working principle of third-generation automotive wheel hub bearings is mainly based on their highly integrated design and optimized structure. The following is a detailed explanation of its working principle:
1、 Structural characteristics
The third-generation wheel hub bearings consist of an outer ring with flanges connected to the suspension and an inner ring with flanges connected to the brake disc and steel ring. Its structural features include:
Double row angular contact ball bearings: The main structure of the product is two double row angular contact ball bearings with flange structures, which enable the bearings to withstand large radial and axial loads.
Flange connection: One flange is connected to the car wheel hub, and the other flange is connected to the suspension. This connection method simplifies the assembly process and improves assembly accuracy.
High performance sensors: The bearing unit is equipped with a synchronous speed disc and high-performance sensors, which are the signal acquisition units of the car ABS system, improving the safety and stability of the vehicle.
2、 Working principle
Bearing radial and axial loads:
Radial load: During the driving process of a car, the wheels will be subjected to radial forces from the road surface, such as uneven road surfaces, centrifugal forces during turning, etc. The double row angular contact ball bearings in the third-generation wheel hub bearings can effectively withstand these radial loads, ensuring stable rotation of the wheels.
Axial load: During acceleration, braking, or turning, the wheels are also subjected to axial forces. The design of the third-generation wheel hub bearings enables them to withstand both radial and axial loads simultaneously, ensuring stable rotation of the wheels under various working conditions.
Lubrication and sealing:
Lubrication: The third-generation wheel hub bearings are designed with a lubrication system inside, which reduces friction and wear inside the bearings through the circulation of lubricating oil, and improves the service life of the bearings.
Sealing: The sealing system of the bearing can effectively prevent impurities such as dust and moisture from entering the interior of the bearing, thereby avoiding damage and failure of the bearing.
ABS signal acquisition:
The high-performance sensors in the third-generation wheel hub bearing unit can collect real-time wheel speed information and transmit this information to the ABS system. The ABS system controls the braking force of the wheels based on this information, thereby preventing the wheels from locking or slipping during the braking process, improving the safety and stability of the vehicle.
3、 Performance advantages
Simplified assembly: The third-generation wheel hub bearings simplify the assembly process through flange connections, avoiding installation errors and reducing costs.
Improved performance: Due to precise control of all dimensions by the supplier, the performance of the third-generation wheel hub bearings has been significantly improved.
Optimize structure: The design of the third-generation wheel hub bearings makes their structure more compact and lightweight, which helps reduce the weight and volume of the car and improve fuel economy.
In summary, the third-generation automotive wheel hub bearings have achieved effective bearing of radial and axial loads, good lubrication and sealing, and accurate acquisition of ABS signals through their highly integrated design and optimized structure. These characteristics have made the third-generation wheel hub bearings widely used in the automotive industry and favored by mainstream car manufacturers.