What are car front wheel bearings
automobile front wheel bearing is a very important part of the automobile front wheel, its main role is to carry the weight of the front of the vehicle, and provide accurate guidance for the smooth rotation of the front wheel hub. This means that it has to bear both the radial load from the vertical direction of the road when the vehicle is running, and the axial load caused by steering .
Structure and working principle
Early automobile front wheel bearings usually consist of two single-row tapered bearings, which is difficult to assemble in automobile production line, high cost and poor reliability. Modern automobile front wheel bearings have been developed to a better performance stage, such as the use of double row tapered roller bearings or double row angular contact ball bearings, and the development of hub bearing units with bearings as the core. Hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings, it integrates two sets of bearings into a whole, with good assembly performance, can be omitted clearance adjustment, light weight, compact structure, large load capacity .
Installation and maintenance
In terms of installation, the front wheel bearings are usually cylindrical ball bearings, which need to be pressed into the front wheel steering knuckle when installed, and the hub head is pressed into it, and the contact transmission is made by the hub spline and the drive shaft. The specific installation steps include stably lifting the vehicle, removing the front tire, removing the brake disc and brake caliper, removing the bearing dust cover and large nut, and removing the brake caliper .
Fault performance and maintenance methods
If the front wheel bearing of the car fails, it may show symptoms such as loud driving noise, unstable vehicle control, and steering wheel shaking. During maintenance, you need to clean the shaft holes, install new bearings, and install dust cover .
The main functions of automobile front wheel bearings include support, shock absorption, sealing and guiding . To be specific:
support : The front wheel bearings support the weight of the axle and ensure that the axle is not damaged by excessive pressure when the wheel is rotating .
shock absorber : bearing internal grease or other shock absorber materials, can effectively absorb the impact of road on the axle, reduce the impact of vibration on passengers .
seal : bearings are usually equipped with sealing rings to prevent moisture and other impurities from entering the bearing interior and extend its service life .
guide : there is a ball or roller group in the bearing, which rolls inside the bearing and guides the direction of movement of the axle so that the wheel can rotate smoothly .
In addition, the damage of the front wheel bearing usually leads to abnormal vibration, noise and other problems during the running of the vehicle, and may even lead to the loss of control of the vehicle in serious cases. Therefore, it is very important to regularly check the working condition of the front wheel bearing and timely replace the seriously worn bearing .
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