hub bearing unit

Abstract

The invention discloses a wheel hub bearing unit and belongs to the field of automobile accessories. The wheel hub bearing unit comprises a wheel hub, an outer ring flange, a bell-shaped housing, a long-end shaft neck, balls and a ventilated disc, wherein the wheel hub and the ventilated disc form an integrated structure; the bell-shaped housing and the long-end shaft neck form an integrated structure; a handle part of the long-end shaft neck and an inner circle of the wheel hub are matched by a spline; a step is arranged on the long-end shaft neck; a ferrule is fixed on the step; a first inner raceway is arranged on the ferrule; a second inner raceway is arranged on the long-end shaft neck; two outer raceways which respectively correspond to the first inner raceway and the second inner raceway in position are arranged on the inner circle of the outer ring flange; the balls are arranged between each inner raceway and the corresponding outer raceway; one end of the ferrule is tightly attached to the step; the other end of the ferrule is tightly attached to the wheel hub; the bell-shaped housing and the long-end shaft neck are integrated, and the ventilated disc and the wheel hub are integrated, so that the number of parts of the wheel hub bearing unit is greatly reduced, the structure is more compact, and the integral weight of the wheel hub bearing unit is reduced; the integrated degree of the parts is high, so that the reliability of the system is improved, and mounting is more convenient and efficient.

Description

technical field [0001] The invention relates to a hub bearing unit, in particular to a hub bearing unit with a compact structure, which belongs to the field of auto parts. Background technique [0002] As an important part of the car, the hub bearing unit is mainly used to bear weight and provide precise guidance for the rotation of the hub bearing. At present, the constant velocity universal joint and the third-generation hub bearing unit are generally used in cars. The hub bearing unit is connected with the wheel, and the constant velocity universal joint is matched with the inner flange by splines. This structure has many parts and complex assembly. The car has a small turning radius. With the further development of science and technology, people's requirements for the integration and compactness of car parts have been further improved. [0003] On January 17, 2010, the Chinese invention patent application CN101633292 disclosed a constant velocity universal joint with a...

AI Technical Summary

Problems solved by technology

[0003] On January 17, 2010, the Chinese invention patent application CN101633292 disclosed a constant velocity universal joint with a hub bearing unit. The outer circle of the adjacent hub and the outer circle of the fixed end universal joint are jointly used as the inner ring of the bearing unit. A first ring of raceways is formed on the outer circle of the hub for one row of rolling elements to roll, and a second ring of raceways is formed on the outer circle of the fixed end universal joint for the other row of rolling elements to roll, and the two rows of raceways are not on the same Individually, when mating with the raceway of the outer ring of the flange, it is more complicated and difficult to install the ball

In this structure, the inner ring and the bell-shaped housing are set separately, and there are many parts, the structure is complicated, and it is difficult to process and install.

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