Composite type automobile hub bearing unit

Abstract

The invention discloses a composite type automobile hub bearing unit which comprises a flange large inner ring, a small inner ring and an outer ring, wherein the end part of the flange large inner ring is provided with a turned edge; the neck part of the flange large inner ring is provided with a step; the small inner ring is fixed on a shaft neck between the turned edge and the step by the turned edge; the step on the neck part of the flange large inner ring is provided with a conical outer roller path; the small inner ring is provided with a spherical outer channel; the inner side of the outer ring is provided with a conical inner roller path and a spherical inner channel; a tapered roller is arranged between the conical outer roller path and the conical inner roller path; and a ball roller is arranged between the spherical outer channel and the spherical inner channel. In the technical scheme of the invention, a bearing with greater stress at the inner side is designed into a tapered roller type, a bearing with smaller stress at the outer side is designed into an angular-contact ball bearing structure, so that the hub bearing unit hardly has early failure, simultaneously the quality risk brought about by the complex manufacturing can be reduced, and the reliability of a unit assembly can be improved better.

Description

technical field [0001] The invention relates to an automobile chassis component, in particular to a composite automobile hub bearing unit. Background technique [0002] Most of the slewing bearings of modern automobile hubs adopt the bearing unit assembly structure. Generally, small passenger cars adopt the double-row angular contact ball hub bearing unit assembly, while commercial vehicles, off-road vehicles and (cargo) commercial vehicles Due to the high load carrying capacity required, conical hub bearing unit assemblies are mostly used. However, the friction torque of tapered bearings is large during startup and operation, and the temperature rise is high. At the same time, the processing technology is complicated, and the processing difficulty is significantly higher than that of ball bearings. In practical applications, the stress conditions of tapered roller bearings are very complicated. Combining these factors, the probability of early failure of the conical hub be...

AI Technical Summary

Problems solved by technology

However, the friction torque of tapered bearings is large during startup and operation, and the temperature rise is high. At the same time, the processing technology is complicated, and the processing difficulty is significantly higher than that of ball bearings. In practical applications, the stress conditions of tapered roller bearings are very complicated. Combining these factors, the probability of early failure of the conical hub bearing unit is significantly higher than that of the hub bearing unit with angular contact ball structure

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