Multi-lip hub unit with high-sealing-performance sealing ring

Abstract

The utility model relates to a multi-lip hub unit with a high-sealing-performance sealing ring, which belongs to the technical field of hub bearing structures and comprises a hub flange plate, a plurality of assembly bolts inserted with the hub flange plate are arranged on the hub flange plate, an outer ring flange sleeved with the hub flange plate is arranged on the hub flange plate, and the outer ring flange is connected with the hub flange plate. An inner ring nested with the hub flange plate in a clamping groove mode is arranged between the rear end of the outer ring flange and the hub flange plate, retainers are arranged between the outer ring flange and the inner ring and between the front end of the outer ring flange and the hub flange plate, a plurality of annularly-distributed balls are arranged on the retainers, and a multi-lip sealing piece is arranged between the front end of the outer ring flange and the hub flange plate. A magnetic sealing piece is arranged between the rear end of the outer ring flange and the inner ring, and steel belt rings nested with the inner ring in a clamping groove mode are arranged between the multi-lip sealing piece and the inner ring and between the magnetic sealing piece and the inner ring. The sealing device has the characteristics of simple structure, good sealing effect and long service life. The problems of insufficient lubricating oil and accelerated abrasion caused by entering of impurities due to poor sealing are solved.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub bearing structure technology, specifically to a wheel hub unit with a multi-lipped sealing ring and high sealing performance. Background Technology

[0002] The wheel hub unit, also known as the wheel hub bearing, is one of the key components of an automobile. Its main function is to bear the weight and provide precise guidance for the rotation of the wheel hub, which requires it to withstand not only axial loads but also radial loads.

[0003] Traditional automotive wheel bearings consist of two sets of tapered roller bearings or ball bearings. The installation, lubrication, sealing, and clearance adjustment of the bearings are all carried out on the automotive production line. This structure makes assembly difficult, costly, and unreliable at the automotive manufacturing plant. Furthermore, the bearings need to be cleaned, lubricated, and adjusted during vehicle maintenance at repair shops.

[0004] With the development of science and technology, wheel hub units are now widely used in automobiles. The application and usage of wheel hub bearing units are increasing daily, and they have now evolved to the third generation. The first generation consisted of double-row angular contact bearings, while the second generation had a flange on the outer raceway for securing the bearing, allowing for simple mounting of the bearing onto the axle and securing it with a nut, thus simplifying automobile maintenance. However, the sealing structure of the wheel hub bearing unit directly affects its service life. Summary of the Invention

[0005] This invention primarily addresses the shortcomings of existing technologies by providing a multi-lip hub unit with a high-performance sealing ring. It features a simple structure, excellent sealing effect, and long service life. It also solves the problem of insufficient lubrication and impurities leading to accelerated wear due to poor sealing.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:

[0007] A multi-lipped wheel hub unit with a high-sealing-performance sealing ring includes a wheel hub flange. The wheel hub flange has several mounting bolts that insert into it. The wheel hub flange has an outer ring flange that fits into it. An inner ring, nested in a groove-like manner between the rear end of the outer ring flange and the wheel hub flange, is provided. A retainer is provided between the outer ring flange and the inner ring, and between the front end of the outer ring flange and the wheel hub flange. The retainer has several annularly distributed balls that are movably fitted into it. A multi-lipped seal is provided between the front end of the outer ring flange and the wheel hub flange. A magnetic seal is provided between the rear end of the outer ring flange and the inner ring. A steel strip ring, nested in a groove-like manner between the multi-lipped seal and the inner ring, and between the magnetic seal and the inner ring, is provided.

[0008] Because the length of the assembly bolts is greater than the distance between the outer flange and the wheel hub flange, the assembly bolts need to be installed before installing the outer flange. Since the lifespan of the assembly bolts is longer than that of other components, the non-removable structure of the assembly bolts prevents the assembly bolts from being lost during wheel hub disassembly.

[0009] Preferably, the multi-lip seal includes a multi-bend support frame nested with the inner wall and end face of the outer flange. The multi-bend support frame is provided with a sealing layer that is snap-fitted and fixedly connected with the multi-bend support frame. The sealing layer and the hub flange are provided with a plurality of sealing lips that are integrated with the sealing layer.

[0010] Preferably, the magnetic seal includes a magnetic ring, and an L-shaped multi-lip skeleton sealing ring is provided between the magnetic ring and the outer flange.

[0011] Preferably, a plurality of elastic fasteners arranged in a ring are provided between the magnetic ring and the inner ring. The elastic fasteners include springs that are inserted into the inner ring, and steel balls are provided between the springs and the magnetic ring.

[0012] This invention can achieve the following effects:

[0013] This invention provides a multi-lip hub unit with a high-sealing-performance sealing ring, which, compared with existing technologies, features a simple structure, good sealing effect, and long service life. It solves the problem of insufficient lubrication and impurities causing accelerated wear due to poor sealing. Attached Figure Description

[0014] Figure 1 This is a structural cross-sectional view of the present invention.

[0015] Figure 2 This is a schematic diagram of the connection structure of the multi-lip seal in this utility model.

[0016] Figure 3 This is a schematic diagram of the connection structure of the magnetic sealing element in this utility model.

[0017] In the diagram: 1. Outer flange; 2. Mounting bolts; 3. Hub flange; 4. Multi-lip seal; 5. Spline mounting hole; 6. Cage; 7. Steel band ring; 8. Ball bearing; 9. Magnetic seal; 10. Inner ring; 11. Elastic fastener; 12. Sealing layer; 13. Sealing lip; 14. Multi-bend support frame; 15. L-shaped multi-lip frame sealing ring; 16. Steel ball; 17. Spring; 18. Magnetic ring. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] Example: Figure 1 , Figure 2 and Figure 3 As shown, a multi-lip wheel hub unit with a high-sealing-performance sealing ring includes a wheel hub flange 3. The wheel hub flange 3 has five mounting bolts 2 that insert into it. The wheel hub flange 3 also has an outer flange 1 that fits into it. An inner ring 10, which is nested between the rear end of the outer flange 1 and the wheel hub flange 3, is provided in a slotted manner. A retainer 6 is provided between the outer flange 1 and the inner ring 10, and between the front end of the outer flange 1 and the wheel hub flange 3, to retain... The cage 6 has 12 ring-shaped balls 8 that are movably fitted with the cage 6. A multi-lip seal 4 is provided between the front end of the outer flange 1 and the hub flange 3. The multi-lip seal 4 includes a multi-bend support frame 14 nested within the inner wall and end face of the outer flange 1. A sealing layer 12 is provided on the multi-bend support frame 14 and is fixedly fitted with it. Several sealing lips 13, integrated with the sealing layer 12, are provided between the sealing layer 12 and the hub flange 3. A magnetic seal 9 is provided between the rear end of the outer flange 1 and the inner ring 10. The magnetic seal 9 includes a magnetic ring 18. An L-shaped multi-lip skeleton sealing ring 15 is provided between the magnetic ring 18 and the outer flange 1. Three ring-shaped elastic fasteners 11 are provided between the magnetic ring 18 and the inner ring 10. Each elastic fastener 11 includes a spring 17 that inserts into the inner ring 10. A steel ball 16 is provided between the spring 17 and the magnetic ring 18. A steel strip ring 7 is provided between the multi-lip seal 4 and the inner ring 10, and between the magnetic seal 9 and the inner ring 10, which is nested in a groove with the inner ring 10.

[0020] In summary, this multi-lip hub unit with a high-performance sealing ring features a simple structure, excellent sealing effect, and long service life. It solves the problem of insufficient lubrication and impurities causing accelerated wear due to poor sealing.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A multi-lip wheel hub unit with a high-sealing-performance sealing ring, characterized in that: The system includes a hub flange (3), which has several mounting bolts (2) that are inserted into it. The hub flange (3) also has an outer ring flange (1) that fits into it. An inner ring (10) is nested between the rear end of the outer ring flange (1) and the hub flange (3) and is grooved to fit into the hub flange (3). A retaining device is provided between the outer ring flange (1) and the inner ring (10), and between the front end of the outer ring flange (1) and the hub flange (3). The retainer (6) is provided with a number of balls (8) arranged in a ring and movably connected with the retainer (6). A multi-lip seal (4) is provided between the front end of the outer flange (1) and the hub flange (3). A magnetic seal (9) is provided between the rear end of the outer flange (1) and the inner ring (10). A steel strip ring (7) is provided between the multi-lip seal (4) and the inner ring (10) and between the magnetic seal (9) and the inner ring (10) and is nested in a groove with the inner ring (10).

2. The hub unit with multi-lipped, high-sealing-performance sealing ring according to claim 1, characterized in that: The multi-lip seal (4) includes a multi-bend support frame (14) nested with the inner wall and end face of the outer ring flange (1). The multi-bend support frame (14) is provided with a sealing layer (12) that is snapped and fixedly connected with the multi-bend support frame (14). The sealing layer (12) and the hub flange (3) are provided with several sealing lips (13) that are integrated with the sealing layer (12).

3. The hub unit with multi-lipped, high-sealing-performance sealing ring according to claim 1, characterized in that: The magnetic seal (9) includes a magnetic ring (18), and an L-shaped multi-lip skeleton seal ring (15) is provided between the magnetic ring (18) and the outer flange (1).

4. The hub unit with multi-lipped, high-sealing-performance sealing ring according to claim 3, characterized in that: The magnetic ring (18) and the inner ring (10) are provided with a plurality of elastic fasteners (11) arranged in a ring. The elastic fasteners (11) include springs (17) that are inserted into the inner ring (10). A steel ball (16) is provided between the springs (17) and the magnetic ring (18).

Images