The invention discloses a box type outer sealing structure of a hub bearing unit, and relates to the field of hub bearings. The box type outer sealing structure comprises an inner framework and an outer framework, the inner framework is tightly attached to the outer diameter of an outer ring and the end face of the outer ring, the outer framework is provided with a bottom face which is tightly attached to the outer diameter of a flange and a straight face which is tightly attached to the end face of the flange, the bottom face and the straight face are perpendicular to each other and are in arc transition, the straight face extends upwards in the direction of the end face of the flange, the top of the straight face inclines towards the inner framework to form a slope, the top of the slopeextends upwards to form an upward fold, the top of the inner framework is folded upwards to form an inwards-folded structure, an inner fold extends towards the flange side in the axis direction of theouter ring, an inner rubber wraps the periphery of the inner framework and is adhered into a whole through glue joint, and at most two contact type lips are arranged on the inner rubber and used forbeing matched with the outer framework. The box type outer sealing structure of the hub bearing unit has high sealing performance, invasion resistance of external muddy water under various working conditions is met, the anti-leakage capability on lubricating grease in the interior of a bearing is high, and a two-lip contact type structure is adopted, so that the friction level of the bearing is greatly reduced.
本发明公开了一种盒式轮毂轴承单元外密封结构,涉及轮毂轴承领域,包括内骨架和外骨架,内骨架与外圈外径及外圈端面紧贴,外骨架具有与法兰外径紧贴的底面及与法兰端面紧贴的直面,底面与直面相互垂直并通过圆弧过渡,直面沿法兰端面的方向向上延伸,直面顶部向内骨架倾斜形成斜坡,斜坡顶部向上延伸形成上折;内骨架顶部向上折叠形成内折结构,内折沿外圈的轴线方向朝法兰侧延伸;内橡胶包覆在内骨架外周并通过胶接粘附为一体,内橡胶上设有至多两个接触式唇口用于配合外骨架。本发明具有高密封性能,满足各种工况下对外界泥水的侵入抵御;对轴承内部润滑油脂的抗泄漏能力强;采用两唇接触式结构,大幅降低轴承摩擦水平。
Box type outer sealing structure of hub bearing unit
一种盒式轮毂轴承单元外密封结构
2021-01-08
Patent
Elektronische Ressource
Chinesisch
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