Sealing assembly for wheel hub bearing unit

Abstract

The invention relates to a novel sealing assembly for a wheel hub bearing unit. The sealing assembly comprises a rubber protrusion, a stainless steel frame, a first lip, a second lip, a third lip and a fourth lip which are attached to a framework; the rubber protrusion, the stainless steel frame, the first lip, the second lip, the third lip and the fourth lip are of an integrated single-piece structure attached to the framework; the framework is installed on an outer circle of a wheel hub; the stainless steel frame is installed on a wheel hub flange; and a gap is formed between the first lip and the stainless steel frame when the first lip is in a natural state. Through the novel sealing assembly for the wheel hub bearing unit, the probability that muddy water directly flows into the wheel hub bearing unit is further decreased, the sealing performance during large loads is improved by additionally providing one lip, and the torque is not increased during small loads.

Description

technical field [0001] The invention relates to the field of automobile hubs, in particular to a novel sealing assembly for a hub bearing unit. Background technique [0002] Since the wheel hub bearings of automobiles have high requirements for durability and high reliability, in addition to avoiding raceway fatigue failure of automobile bearings, the failure of wheel hub bearing seals is also a relatively common failure mode, which often leads to external sediment and dust. Pollutants such as water vapor and water vapor intrude into the bearing, causing abnormal noise in the bearing, accelerating the wear of the groove and the steel ball, causing fatigue and peeling of the surface of the steel ball and groove, and internal grease leaking to the outside, resulting in poor lubrication and affecting the product life. If the grease leaks to the brake disc or brake drum, it will cause its braking ability to decrease and fail, and the consequences will be very serious. [0003] ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the skeleton structure of the hub bearing seal in the prior art is relatively simple, water will still flow into the lip along the gap, causing abnormal noise in the bearing, accelerating the wear of the groove and the steel ball, and causing fatigue and peeling of the surface of the steel ball and groove The lips are always in contact, and the torque is consistent when the side load is relatively small and when the side load is large. When the side load is large, the sealing performance is poor and other defects. The invention provides a hub bearing unit Using a sealing assembly, the sealing assembly includes rubber protrusions attached to the skeleton, a stainless steel skeleton, lip one, lip two, lip three, and lip four;

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