A hub bearing unit with a low-friction and high-sealing structure

Abstract

A wheel hub bearing unit with a low-friction, high-sealing structure is disclosed. This invention primarily addresses the problem of easy wear and aging of the sealing structure in traditional wheel hub bearing units. The sealing assembly comprises: a lower frame (7) mounted on the outer ring, the lower frame having a fourth lip (71) for sealing with the flange; and an upper frame (6) mounted on the outer ring, the upper frame having a first lip (61) for sealing with the upper end face of the outer ring, a second lip (62) for sealing with the lower end face of the outer ring, and several third lips (63) for sealing with the lower frame. This invention provides a wheel hub bearing unit with a low-friction, high-sealing structure, forming a multi-layered sealing protection mechanism and significantly improving the reliability of the sealing system.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a wheel hub bearing unit with a low-friction, high-sealing structure. Background Technology

[0002] Traditional wheel hub bearing units employ a double-lip seal design, relying solely on the rubber sealing lip to directly contact the bearing race and form a single anti-contamination barrier. Under harsh conditions such as high-speed rotation, mud and water splashing, or salt spray corrosion, the sealing lip is prone to wear and aging, leading to contaminant intrusion and grease leakage, causing abnormal bearing noise or even premature failure. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a wheel hub bearing unit with a low-friction and high-sealing structure, which mainly solves the problem of easy wear and aging of the sealing structure of traditional wheel hub bearing units.

[0004] The technical solution of this utility model is as follows:

[0005] A hub bearing unit with a low-friction, high-sealing structure includes an inner ring and an outer ring. A flange is provided on the inner ring. A cage is provided between the inner ring and the outer ring. A plurality of balls are provided on the cage. A sealing assembly is provided on one side of the cage. The sealing assembly includes…

[0006] The lower frame is installed on the outer ring, and the lower frame is provided with a fourth lip that seals with the flange.

[0007] An upper frame is installed on the outer ring. The upper frame is provided with a first lip that seals with the upper end face of the outer ring, a second lip that seals with the lower end face of the outer ring, and several third lips that seal with the lower frame.

[0008] The adjacent third lip and the lower skeleton surround to form a cavity, which is filled with grease.

[0009] The lower frame includes an L-shaped plate, which comprises a straight plate and a horizontal plate, and there is a gap between the straight plate and the first lip at the tail end.

[0010] The upper frame is also provided with a guide lip, one end of which extends upward toward the horizontal plate and there is a second gap between the guide lip and the horizontal plate.

[0011] The horizontal plate is positioned above the guide lip.

[0012] The rolling ball is a steel ball.

[0013] A flow channel is formed between the lower frame and the upper frame, and the flow channel passes through a gap and a second gap.

[0014] The beneficial effects of this utility model are: This utility model provides a hub bearing unit with a low-friction and high-sealing structure, forming a multi-layer sealing protection mechanism, which significantly improves the reliability of the sealing system. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0016] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0017] Figure 3 This is a schematic diagram of existing technology. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. A hub bearing unit with a low-friction, high-sealing structure includes an inner ring 1 and an outer ring 2. A flange 3 is provided on the inner ring. A cage 4 is provided between the inner ring and the outer ring. A plurality of balls 41 are provided on the cage. A sealing assembly 5 is provided on one side of the cage. The sealing assembly includes a lower skeleton 7, which is mounted on the outer ring and has a fourth lip 71 that seals with the flange. An upper skeleton 6 is mounted on the outer ring and has a first lip 61 that seals with the upper end face of the outer ring, a second lip 62 that seals with the lower end face of the outer ring, and a plurality of third lips 63 that seal with the lower skeleton. Multiple seals are provided on the upper and lower skeletons to increase the sealing effect and significantly improve the reliability of the sealing system.

[0019] In this embodiment, as shown in the figure, the adjacent third lip and the lower skeleton surround to form a cavity 68, which is filled with grease to enhance the sealing effect.

[0020] In this embodiment, as shown in the figure, the lower frame includes an L-shaped plate 64, which comprises a straight plate 641 and a horizontal plate 642. A gap 643 exists between the straight plate and the first lip at the tail end. This low-torque design reduces frictional resistance.

[0021] In this embodiment, as shown in the figure, the upper frame is also provided with a guide lip 65, one end of which extends upward toward the horizontal plate and has a second gap 651 between it and the horizontal plate. This low-torque design reduces frictional resistance.

[0022] In this embodiment, as shown in the figure, the horizontal plate is positioned above the guide lip.

[0023] In this embodiment, as shown in the figure, the rolling ball is a steel ball.

[0024] In this embodiment, as shown in the figure, a flow channel 8 is formed between the lower frame and the upper frame, and the flow channel passes through a gap and a second gap. This allows water to be discharged in the opposite direction during rotation.

[0025] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A hub bearing unit with a low-friction, high-sealing structure, comprising an inner ring (1) and an outer ring (2), wherein a flange (3) is provided on the inner ring, a cage (4) is provided between the inner ring and the outer ring, a plurality of balls (41) are provided on the cage, and a sealing assembly (5) is provided on one side of the cage, characterized in that: The sealing assembly includes The lower frame (7) is installed on the outer ring, and the lower frame is provided with a fourth lip (71) that seals with the flange. The upper frame (6) is installed on the outer ring. The upper frame is provided with a first lip (61) that seals with the upper end face of the outer ring, a second lip (62) that seals with the lower end face of the outer ring, and several third lips (63) that seal with the lower frame.

2. A hub bearing unit with a low-friction, high-sealing structure according to claim 1, characterized in that: The adjacent third lip and the lower skeleton surround to form a cavity (68), which is filled with grease.

3. A hub bearing unit with a low-friction, high-sealing structure according to claim 1, characterized in that: The lower frame includes an L-shaped plate (64), which includes a straight plate (641) and a horizontal plate (642), and there is a gap (643) between the straight plate and the first lip at the tail end.

4. A hub bearing unit with a low-friction, high-sealing structure according to claim 3, characterized in that: The upper frame is also provided with a guide lip (65), one end of which extends upward toward the horizontal plate and there is a second gap (651) between the guide lip and the horizontal plate.

5. A hub bearing unit with a low-friction, high-sealing structure according to claim 4, characterized in that: The horizontal plate is positioned above the guide lip.

6. A hub bearing unit with a low-friction, high-sealing structure according to any one of claims 1-5, characterized in that: The rolling ball is a steel ball.

7. A hub bearing unit with a low-friction, high-sealing structure according to claim 4, characterized in that: A flow channel (8) is formed between the lower skeleton and the upper skeleton, and the flow channel passes through the gap and the second gap.

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