The invention provides a hub bearing unit of a low-torque sealing structure, and relates to the technical field of hub bearing units. The hub bearing unit comprises an inner framework, a dust cover and a sealing block, wherein the section of the dust cover is C-shaped; the sealing block is fixedly connected with the inner framework, and a gap is formed between the sealing block and the outer peripheral wall of the dust cover; a first lip, a second lip and a third lip are arranged on the sealing block, and a non-contact labyrinth channel is formed between the first lip and the outer peripheral wall of the dust cover; and the end of the second lip is in contact with the end face of the dust cover, and the end of the third lip is in contact with the inner peripheral wall of the dust cover. The problems that in the prior art, lots of lips of dustproof sealing rings are arranged, and the risk of interference exists among the lips; once one lip is damaged, the adjacent lips are prone to being damaged; and lots of contact lips are arranged, and the friction torque is large are solved.
本发明提出了一种低力矩密封结构的轮毂轴承单元,涉及轮毂轴承单元的技术领域,包括内骨架、防尘盖和密封块,所述防尘盖的断面形状呈C型,所述密封块与内骨架固定连接,在密封块与防尘盖的外侧周壁之间形成间隙,在密封块上设有第一唇口、第二唇口和第三唇口,在第一唇口与防尘盖的外侧周壁之间形成非接触式迷宫通道,第二唇口的端部与防尘盖的端面接触,第三唇口的端部与防尘盖的内侧周壁接触。解决了现有技术中的防尘密封圈唇口布置较多,相互之间有干扰的风险,一旦一个唇口损坏很容易连带相邻唇口损坏,且接触唇口多,摩擦力矩较大的问题。
Hub bearing unit of low-torque sealing structure
一种低力矩密封结构的轮毂轴承单元
2022-01-14
Patent
Electronic Resource
Chinese
Diversion type hub bearing unit with high-airtightness and low-torque sealing structure
European Patent Office | 2020
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