The first generation of automotive wheel hub bearings mainly consisted of inner and outer rings, rolling elements (such as steel balls or rollers), retainers, seals, and high-temperature lubricating grease. The following is a detailed description of each component:
Inner ring: usually cooperates with the shaft and rotates together with the shaft. The design of the inner ring ensures a tight connection with the shaft, usually using an interference fit to prevent loosening during high-speed rotation.
Outer ring: It matches with the bearing seat hole to provide support.
. The design of the outer ring considers the compatibility with the bearing seat hole to ensure the stability and reliability of the bearing during operation.Rolling elements: They are evenly arranged between the inner and outer rings with the help of a cage, playing a rolling role.
. Rolling elements generally use steel balls or rollers to reduce friction through rolling friction, allowing the wheels to rotate more freely.Cage: Separate a set of rolling elements in the bearing at equal distances to ensure even force distribution on the rolling elements.
. The design of the cage ensures the uniform distribution of rolling elements during operation, thereby extending the service life of the bearing. Sealing element: It plays a role in preventing grease leakage and dust. The design of the sealing element effectively prevents the leakage of lubricating grease and the intrusion of dust, maintains the cleanliness of the bearing interior, and ensures the durability of the bearing.High temperature lubricating grease: Special high-temperature lubricating grease is used to ensure that the bearing can still work stably in high temperature environments.
. The selection of lubricating grease takes into account the temperature changes of the bearing during operation to ensure that the bearing can maintain good lubrication performance under various working conditions.