Low-torque self-adjusting sealing assembly and hub bearing thereof

Abstract

The low-torque self-adjusting sealing assembly comprises a framework I, a framework II and a framework III, the framework I and the framework II are arranged on a hub outer ring, the framework III is arranged on a flange plate, a roller path is formed between the hub outer ring and the flange plate, and a cavity and a gap are formed in the outer side of the roller path. The framework I, the framework II and the framework III are located in a cavity on the outer side of the roller path, the framework I is wrapped with water swelling rubber, the framework II is wrapped with wrapping rubber, and protrusions of the wrapping rubber are matched with the framework III. The sealing structure has the beneficial effects that the long and narrow sealing channel is additionally arranged, the labyrinth effect is generated, the length of a muddy water invasion path is increased, then the difficulty that external muddy water and dust invade a bearing raceway is increased, and damage of dust particles and impurities in muddy water to the sealing lip is reduced. Contact lips are reduced, water absorption rubber is additionally arranged, low torque is achieved while high sealing performance is guaranteed, and the purpose of self-adjustment of the sealing performance is achieved.

Description

technical field [0001] The invention relates to a hub bearing structure, in particular to a low-torque self-adjusting sealing assembly and the hub bearing thereof. Background technique [0002] The existing wheel hub bearing adopts traditional sealing components. The muddy water intrusion channel of the sealed structure is relatively open, the muddy water intrusion path is relatively simple, and there are many contact lips. It cannot meet the low torque requirement while improving the sealing performance. Moreover, the traditional sealing component structure cannot be adjusted according to the wading situation. Therefore, during use, splashed muddy water and impurity particles in it can easily enter into contact with the sealing lip. During the long-term rotation and loading process, muddy water and impurity particles will accelerate the wear of the sealing lip, easily accelerate the failure of the seal, and cause muddy water intrusion Risk of raceway failure, grease contam...

AI Technical Summary

Problems solved by technology

[0002]The existing wheel hub bearing adopts traditional sealing components, the mud water intrusion channel of the sealing structure is relatively open, the mud water intrusion path is relatively simple, and there are many contact lips, which can improve the sealing performance. At the same time, it cannot meet the requirements of low torque

Moreover, the structure of traditional sealing components cannot be adjusted according to the wading situation

Therefore, during use, splashed muddy water and impurity particles in it can easily enter into contact with the sealing lip. During the long-term rotation and loading process, muddy water and impurity particles will accelerate the wear of the sealing lip, easily accelerate the failure of the seal, and cause muddy water intrusion Risk of raceway failure, grease contamination and grease spillage

More contact lips can not meet the requirements of low torque while improving sealing

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