Automobile and hub bearing unit thereof

Abstract

The invention discloses a hub bearing unit which comprises a hub, an outer bearing and an inner bearing. The outer bearing and the inner bearing are installed in an inner cavity of the hub. The innercavity of the hub is provided with a blocking table, the outer ring of the outer bearing and the outer ring of the inner bearing are located on the two sides of the blocking table correspondingly, theleft end of the inner ring of the inner bearing abuts against the right end of the inner ring of the outer bearing, the distance between the outer ring of the outer bearing and the outer ring of theinner bearing is larger than the width of the blocking table, the stepped shaft face of an axle housing spindle nose is sleeved with the hub through the outer bearing and the inner bearing, the rightend of the inner ring of the inner bearing abuts against the stepped end face of the axle housing spindle nose, the left end of the axle housing spindle nose is provided with a spindle nose nut, the spindle nose nut is screwed to tightly press the left end of the inner ring of the outer bearing, and therefore the hub bearing unit is fixed. In this way, the bearing clearance is always in the best state designed in advance, control can be achieved without adjustment, the bearing service life can be prolonged, the maintenance-free state in the guarantee period is achieved, and the automobile repair and maintenance cost is reduced. The invention further discloses an automobile comprising the hub bearing unit.

Description

technical field [0001] The invention relates to the technical field of automobile structures, in particular to an automobile hub bearing unit. Furthermore, the present invention also relates to an automobile comprising the above wheel hub bearing unit. Background technique [0002] Automobile hub bearing is one of the key parts of the automobile, it is mainly used to carry weight and provide precise guidance for the rotation of the hub. [0003] Generally, the wheel hub is fixed on the axle tube of the axle housing through two inner and outer wheel hub bearings. The clearance of the wheel hub bearings must be in the best state to ensure the life of the wheel hub bearings. The clearance of the traditional hub bearing is adjusted manually. Firstly, the shaft nut is tightened so that there is no clearance in the hub bearing, and then the shaft nut is rotated at a certain angle to ensure the clearance of the hub bearing; but when the worker rotates the shaft nut, it cannot be v...

AI Technical Summary

Problems solved by technology

The clearance of the traditional hub bearing is adjusted manually. Firstly, the shaft nut is tightened so that there is no clearance in the hub bearing, and then the shaft nut is rotated at a certain angle to ensure the clearance of the hub bearing; but when the worker rotates the shaft nut, it cannot be very fast For good control, if there are too many rotations, the clearance will be large, and the hub bearing will shake and become unstable, which will affect the life of the bearing. If there is less rotation, the clearance will be small, the friction force of the hub bearing will be large, the wear will be serious, and the bearing life will be reduced.

In addition, the existing automobile wheel bearings need to be disassembled and maintained within a certain period, which is costly and affects the attendance rate

[0004] Therefore, how to solve the problem that the clearance of the automobile hub bearing unit is difficult to adjust and control, and affects the bearing life is a technical problem that those skilled in the art need to solve at present.

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