Hub bearing structure

Abstract

The invention discloses a hub bearing structure which comprises a flange outer ring, a flange inner ring and rolling bodies located between the flange outer ring and the flange inner ring, and the rolling bodies in each row are evenly separated through retainers. The inner ring is composed of three bearing rings, the rolling bodies are divided into a row of steel balls and a row of cylindrical rollers, the steel balls are arranged between a channel in the inner ring and a channel in the flange outer ring, and the cylindrical rollers are arranged between a raceway in the inner ring and a raceway in the flange outer ring. The steel balls are in four-point contact with the inner ring and the outer ring of the outer flange, and the cylindrical rollers are in linear contact with the inner ring and the outer ring of the outer flange.

Description

technical field [0001] The invention relates to a wheel hub bearing structure. Background technique [0002] Wheel hub bearing is a component used at the axle of the car to bear the load and provide precise guidance for the transmission of the wheel hub. During the driving process of the car, the wheel hub bearing must bear not only the axial force, the radial force but also the bending formed when the car turns. Moment action, moment rigidity significantly affects the driving comfort and steering stability of the car, and low torque performance can also significantly reduce energy consumption. For large vehicles, high load-bearing capacity is particularly important, and moment rigidity cannot be ignored. [0003] The existing wheel hub bearing structure has a paired angular contact ball bearing and a paired double-row tapered cylindrical roller bearing. The paired double-row angular contact ball bearing has a certain limit in the moment rigidity within a certain support spa...

AI Technical Summary

Problems solved by technology

[0003] The existing hub bearing structure has paired angular contact ball bearings and paired double-row tapered cylindrical roller bearings. The paired double-row angular contact ball bearings have certain restrictions on the moment rigidity within a certain support span range, and The bearing capacity is not as strong as that of cylindrical roller bearings. Although double-row tapered cylindrical roller bearings installed in pairs have high rigidity and high load capacity, the friction loss is relatively large, which is not conducive to reducing the torque.

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