The third-generation automotive wheel hub bearings are an important breakthrough in automotive wheel hub bearing technology, characterized by four aspects: structural integration, easy installation, performance optimization, and functional expansion. Specifically, they are as follows:.
Optimization of flange design
The outer flange and inner flange are respectively fixed on the steering knuckle and wheel rim, and are connected by bolts to form a whole, avoiding the complex process of second-generation bearings being pressed into the steering knuckle and reducing the requirements for assembly accuracy.
.Lightweight and miniaturization
Through integrated design, the weight of the third generation bearings is reduced by about 120g compared to the second generation, and the radial cross-sectional thickness is reduced, which reduces the non spring bearing weight and helps improve vehicle handling and fuel economy.
.2. Convenient installation: Simplify the process and reduce costs
Bolt fixed installation
The third-generation bearings adopt bolt connection method, without the need to press the wheel hub or adjust the clearance, and the installation time is shortened by more than 50% compared to traditional bearings, significantly reducing the difficulty of assembly and labor costs on the production line.
.Maintenance free design
The bearing components are pre sealed, pre lubricated, and pre-set with clearance, without the need for additional adjustments on the automotive production line, reducing the risk of grease leakage and contamination and extending maintenance cycles.
.Universalization of Drive and Non Drive Designs
By optimizing wheel hub forming technology, the third-generation bearings have achieved the universalization of drive and non drive wheel designs, further reducing component types and inventory costs.
.III. Performance Optimization: High Stiffness and Low Friction
High Stiffness Design
The integrated raceway and hub increase stiffness by 30% compared to traditional systems, eliminating raceway discontinuities between bearings and hubs, and improving braking performance and steering stability.
.Low friction technology
Steel ball surface treatment: Precision surface treatment technology is used to reduce friction losses during operation.
. Low friction grease formula: Combined with proprietary grease, it ensures that bearings remain stable and reliable even under long-term high-intensity use.Dynamic load capacity improvement: By increasing the number of steel balls in the inner ring, optimizing the distribution of contact stress, the bearing life has been extended.
.Enhanced anti-corrosion performance
Special coating treatment is applied to the flange area to effectively resist corrosion in harsh environments, suitable for various climates and road conditions.
.4. Function Expansion: Integrated sensors to enhance safety
ABS sensor integration
The third-generation bearings are equipped with high-sensitivity sensors that can monitor wheel speed in real time and transmit signals to the anti lock braking system (ABS) and vehicle dynamics control system, improving braking safety and stability.
.Sensor protection design
Internal installation: The wheel speed sensor is installed internally, effectively preventing road hazards, impurities, and possible damage.
. Sealing structure: The sensor part is sealed to improve reliability and ensure stable signal output during low-speed rotation.Optimization of Pre tightening Device
The combination of precise pre tightening device and improved sealing design further enhances the dynamic performance and service life of the bearing.
.V. Application Scenarios and Advantages Summary
The third-generation automotive wheel hub bearings have been widely used in mid to high end vehicle models, with core advantages including:
Improved installation efficiency: The bolt fixing method reduces assembly time by more than 50% and lowers production line costs.
.Comprehensive performance improvement: The high stiffness, low friction, and long-life design meet the strict requirements of modern automobiles for safety and reliability.
.Integration of functions: The integration of ABS sensors realizes the coordinated optimization of vehicle dynamics control and braking system.
. Significant economic benefits: Lightweight design reduces fuel consumption, and maintenance free features reduce total lifecycle costs.