Seal assembly for hub bearing unit

Abstract

The invention discloses a seal assembly for a hub bearing unit. The seal assembly for the hub bearing unit mainly comprises a static framework arranged on an outer ring and a rotating framework arranged on a flange plate, a roller path is formed between the outer ring and the flange plate, and a cavity is formed in the outer side of the roller path. The seal assembly has the following beneficial effects that only two lips of the static framework make contact with the rotating framework, and large friction torque is avoided; meanwhile, a large gap is formed between the rotating framework and aflange, muddy water is prevented from directly entering a sealing cavity, and it is ensured that a large amount of muddy water can be accumulated and discharged in time through centrifugation and gravity; through additionally arranging a lip D, the purposes of protecting the matching surface of the rotating framework and the flange and preventing a metal framework at the position from being corroded to generate matching failure can be achieved; and according to the internal structure design of the seal assembly, the difficulty of the muddy water invading a path is increased through the labyrinth effect, non-contact lips are added, muddy water is prevented from invading the sealing cavity, and efficient dynamic sealing is generated through combined action.

Description

Technical field [0001] The invention relates to the field of wheel hub bearings, in particular to a sealing assembly for a wheel hub bearing unit. Background technique [0002] In the prior art solution, more lips are provided in contact with the rotating skeleton, which is likely to cause a larger frictional moment. At the same time, there is a risk that muddy water penetrates into the raceway through the gap between the rotating frame and the flange, causing grease pollution and grease spillage. Summary of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a sealing assembly for a wheel hub bearing unit, which reduces the friction torque under the premise of ensuring the sealing performance; at the same time, through the structural design, the The gap between the flanges penetrates into the raceway and causes the risk of grease pollution and grease spillage, which improves the sealing performance. [0004] Th...

AI Technical Summary

Problems solved by technology

[0002] In the existing technical scheme, there are more contacts between the lips and the rotating frame, which easily causes a large frictional moment

At the same time, there is a risk of muddy water seeping into the raceway through the gap between the rotating frame and the flange, causing grease pollution and grease spillage

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