Oil seepage prevention hub bearing

Abstract

The utility model discloses an oil seepage prevention hub bearing which comprises a bearing body, an inner side flange is fixedly installed on the outer wall of one end of the bearing body, an outer side flange is fixedly installed on the outer wall of the other end of the bearing body, a first threaded hole is formed in the outer wall of the inner side flange, and a second threaded hole is formed in the outer wall of the outer side flange. A wheel bolt penetrates through the second threaded hole, a first pre-tightening structure is arranged at the lower end of the first threaded hole and comprises a protective cover, a first compression spring and a limiting block, and a second pre-tightening structure is arranged at the upper end of the second threaded hole. According to the oil seepage prevention hub bearing, the stability of the inner side flange after being connected with an external steering knuckle is improved conveniently through the arranged first pre-tightening structure, and the stability of the outer side flange after being connected with a brake disc (brake disc) and a wheel is improved conveniently through the arranged second pre-tightening structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, in particular to an anti -seepage hub bearing. BACKGROUND

[0002] The hub bearing is a key component of a vehicle, and its performance directly affects driving safety and stability. A threaded hole is formed in the inner flange of the bearing body. The inner flange is connected to the steering knuckle. The threaded hole in the inner flange is threaded with the steering knuckle and the bolt. After the wheel bolt penetrates the outer flange, it is connected to the brake disc and the wheel.

[0003] There are many mature solutions for the anti-seepage technology of hub bearings. For example, the sealing structure disclosed in the utility model patent with publication number CN218760965U forms multiple sealing interfaces by setting double inner ring sealing lips on the outer end of the inner ring bearing and cooperating with the outer ring sealing lips. The elastic sealing lips compensate for the sealing auxiliary ring, effectively reducing the bearing seepage problem and prolonging the service life. This kind of anti-seepage design based on contact sealing lips has become a typical representative of existing technology.

[0004] However, the structural gap caused by loose bolt connection has not been solved, which may damage the integrity of the sealing interface. During driving, the bolt connection may gradually loosen due to vibration, impact or temperature change, resulting in a decrease in pre-tightening force, which affects the stability of the hub bearing and even causes safety hazards. The traditional structure cannot provide continuous pre-tightening force after bolt connection. After long-term use, the connection part may have a gap, which may increase the risk of loosening.

[0005] Therefore, we propose an anti-seepage hub bearing. CONTENT OF THE UTILITY MODEL

[0006] (I) Technical problems solved

[0007] In view of the shortcomings of the prior art, the utility model provides an anti-seepage hub bearing, which can provide continuous pre-tightening force after bolt connection, has the function of preventing loosening, improves the stability after installation, and can effectively solve the problems in the background technology.

[0008] (II) Technical scheme

[0009] To achieve the above object, the utility model takes the technical scheme for: an anti-seepage oil wheel hub bearing, including bearing body, the outer wall fixed mounting of bearing body one end has the inside flange, the outer wall fixed mounting of bearing body other end has the outside flange, the outer wall of inside flange is equipped with first threaded hole, the outer wall of outside flange is equipped with second threaded hole, the wheel bolt is penetrated in second threaded hole, the lower end of first threaded hole is provided with first pre-tightening structure, first pre-tightening structure includes protective cover, first compression spring and limit block, the upper end of second threaded hole is provided with second pre-tightening structure, second pre-tightening structure includes fixed ring, limit ring, second compression spring and movable ring, and the wheel bolt penetrates movable ring, second compression spring and limit ring.

[0010] Preferably, the protective cover is located in the lower part of the first threaded hole, and the upper end outer surface of the protective cover is fixedly connected with the lower end outer surface of the inside flange.

[0011] Preferably, the first compression spring and the limit block are located inside the protective cover, the first compression spring is fixedly installed between one end of the inner cavity of the protective cover and the outer surface of one side of the limit block, the outer wall of the limit block and the inner wall of the protective cover are in sliding connection, and the lower end outer surface of the limit block is elastically connected with the bottom of the inner cavity of the protective cover through the first compression spring.

[0012] Preferably, the fixed ring is fixedly installed on the upper end outer surface of the outside flange, and the limit ring is fixedly installed on the bottom of the inner cavity of the fixed ring.

[0013] Preferably, the second compression spring is located inside the fixed ring, and the second compression spring is fixedly installed between the upper end outer surface of the limit ring and the lower end outer surface of the movable ring.

[0014] Preferably, the outer wall of the movable ring and the inner wall of the fixed ring are in sliding connection, and the lower end outer surface of the movable ring is elastically connected with the upper end outer surface of the limit ring through the second compression spring.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides an anti-seepage oil wheel hub bearing, which has the following beneficial effects:

[0017] 1、This anti-seepage oil wheel hub bearing, set up first pre-tightening structure, convenient for improving the stability after inside flange and outside steering knuckle connect.

[0018] 2、This anti-seepage oil wheel hub bearing, through setting up second pre-tightening structure, convenient for increasing the stability after outside flange and brake disc (brake disc) and wheel connect. DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an oil-proof wheel hub bearing according to the present invention.

[0020] Figure 2 This is a partial structural schematic diagram of an oil-proof wheel hub bearing according to the present invention.

[0021] Figure 3 This is a side cross-sectional view of the inner flange and the first pre-tightening structure in an oil-proof wheel hub bearing of this utility model.

[0022] Figure 4 This is a side cross-sectional view of the second preload structure in an oil-proof wheel hub bearing of this utility model.

[0023] In the diagram: 1. Bearing body; 2. Inner flange; 3. First threaded hole; 4. First preload structure; 5. Outer flange; 6. Wheel bolt; 7. Second preload structure; 8. Second threaded hole; 9. Protective cover; 10. First compression spring; 11. Limiting block; 12. Fixed ring; 13. Limiting ring; 14. Second compression spring; 15. Movable ring. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] This embodiment is an oil-proof wheel hub bearing.

[0026] like Figures 1-4 As shown, the bearing includes a bearing body 1. An inner flange 2 is fixedly installed on the outer wall of one end of the bearing body 1, and an outer flange 5 is fixedly installed on the outer wall of the other end of the bearing body 1. A first threaded hole 3 is opened on the outer wall of the inner flange 2, and a second threaded hole 8 is opened on the outer wall of the outer flange 5. A wheel bolt 6 passes through the second threaded hole 8. A first pre-tightening structure 4 is provided at the lower end of the first threaded hole 3. The first pre-tightening structure 4 includes a protective cover 9, a first compression spring 10, and a limiting block 11. A second pre-tightening structure 7 is provided at the upper end of the second threaded hole 8. The second pre-tightening structure 7 includes a fixed ring 12, a limiting ring 13, a second compression spring 14, and a movable ring 15, and the wheel bolt 6 passes through the movable ring 15, the second compression spring 14, and the limiting ring 13.

[0027] The protective cover 9 is located at the lower part of the first threaded hole 3, and the upper end outer surface of the protective cover 9 is fixedly connected with the lower end outer surface of the inner flange 2; the first compression spring 10 and the limiting block 11 are located in the interior of the protective cover 9, the first compression spring 10 is fixedly installed between one end of the interior cavity of the protective cover 9 and the outer surface of one side of the limiting block 11, the outer wall of the limiting block 11 is in sliding connection with the inner wall of the protective cover 9, and the lower end outer surface of the limiting block 11 is elastically connected with the bottom of the interior cavity of the protective cover 9 through the first compression spring 10; the fixed ring 12 is fixedly installed on the upper end outer surface of the outer flange 5, the limiting ring 13 is fixedly installed on the bottom of the interior cavity of the fixed ring 12; the second compression spring 14 is located in the interior of the fixed ring 12, and the second compression spring 14 is fixedly installed between the upper end outer surface of the limiting ring 13 and the lower end outer surface of the movable ring 15; the outer wall of the movable ring 15 is in sliding connection with the inner wall of the fixed ring 12, and the lower end outer surface of the movable ring 15 is elastically connected with the upper end outer surface of the limiting ring 13 through the second compression spring 14.

[0028] It should be noted that the utility model is a kind of anti-seepage oil hub bearing, and the first pre-tightening structure 4 is provided, when the inner flange 2 in the bearing body 1 is connected with the steering knuckle of outside, bolt is screwed with first threaded hole 3 by penetrating steering knuckle, bolt extrudes limiting block 11 in first pre-tightening structure 4, limiting block 11 moves along the inner wall of protective cover 9, limiting block 11 extrudes first compression spring 10, then outer flange 5 is connected with brake disc (brake disc) and wheel by wheel bolt 6, wheel bolt 6 extrudes movable ring 15 in second pre-tightening structure 7, movable ring 15 slides along the inner wall of fixed ring 12, movable ring 15 extrudes second compression spring 14 on one side of limiting ring 13, when bearing body 1 is installed, first compression spring 10 and second compression spring 14 are all in compressed state, using the reaction force of first compression spring 10 and second compression spring 14, can provide sustained pre-tightening force, improve the stability after threaded connection.

[0029] It should be noted that in the prior art, the anti-seepage design of the hub bearing is relatively mature, as shown in the patent CN218760965U, the sealing effect is improved by setting the cooperation structure of the inner and outer ring sealing lips, this typical design utilizes the elastic deformation of the sealing lip to form multiple sealing interfaces, which can effectively prevent the leakage of lubricating oil, however, this traditional anti-seepage structure still has certain limitations: the anti-seepage effect depends on the integrity of the sealing element and the stability of the connection part, when the bearing is loose due to vibration, gaps may occur in the sealing interface, thereby reducing the anti-seepage performance, the utility model innovatively adds a pre-tightening device on the basis of retaining the existing sealing structure, fundamentally solves the problem of sealing failure caused by loose connection, and realizes more reliable anti-seepage effect.

[0030] It is to be noted that, in this document, the terms such as first and second, etc. are used merely to distinguish one entity or action from another, and do not necessarily require or imply any such actual relationship or order between such entities or actions. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the stated element.

[0031] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. An oil-proof wheel hub bearing, comprising a bearing body (1), wherein an inner flange (2) is fixedly installed on the outer wall of one end of the bearing body (1), and an outer flange (5) is fixedly installed on the outer wall of the other end of the bearing body (1), wherein a first threaded hole (3) is provided on the outer wall of the inner flange (2), and a second threaded hole (8) is provided on the outer wall of the outer flange (5), wherein a wheel bolt (6) passes through the second threaded hole (8), characterized in that: The lower end of the first threaded hole (3) is provided with a first pre-tightening structure (4), the first pre-tightening structure (4) comprises a protective cover (9), a first compression spring (10) and a limiting block (11), the upper end of the second threaded hole (8) is provided with a second pre-tightening structure (7), the second pre-tightening structure (7) comprises a fixed ring (12), a limiting ring (13), a second compression spring (14) and a movable ring (15), and the wheel bolt (6) penetrates the movable ring (15), the second compression spring (14) and the limiting ring (13).

2. A containment oil hub bearing according to claim 1 wherein: The protective cover (9) is located at the lower part of the first threaded hole (3), and the upper end outer surface of the protective cover (9) is fixedly connected with the lower end outer surface of the inner flange (2).

3. A containment oil hub bearing according to claim 2, wherein: The first compression spring (10) and the limiting block (11) are both located in the interior of the protective cover (9), the first compression spring (10) is fixedly installed between one end of the inner cavity of the protective cover (9) and the outer surface of one side of the limiting block (11), the outer wall of the limiting block (11) and the inner wall of the protective cover (9) are in sliding connection, and the lower end outer surface of the limiting block (11) is elastically connected with the bottom of the inner cavity of the protective cover (9) through the first compression spring (10).

4. A containment oil hub bearing according to claim 3 wherein: The fixed ring (12) is fixedly installed on the upper end outer surface of the outer flange (5), and the limiting ring (13) is fixedly installed on the bottom of the inner cavity of the fixed ring (12).

5. A containment oil hub bearing according to claim 4 wherein: The second compression spring (14) is located in the interior of the fixed ring (12), and the second compression spring (14) is fixedly installed between the upper end outer surface of the limiting ring (13) and the lower end outer surface of the movable ring (15).

6. A containment oil hub bearing according to claim 5 wherein: The outer wall of the movable ring (15) and the inner wall of the fixed ring (12) are in sliding connection, and the lower end outer surface of the movable ring (15) is elastically connected with the upper end outer surface of the limiting ring (13) through the second compression spring (14).

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