Combined sealing ring for light-torque automobile hub bearing

Abstract

The utility model discloses a combined sealing ring for a light-torque automobile hub bearing, which belongs to the technical field of sealing rings and comprises a first sealing portion and a second sealing portion, and the first sealing portion covers the upper end of the second sealing portion. The first sealing part comprises a first sealing framework and a first sealing rubber body; the second sealing part comprises a second sealing framework and a second sealing rubber body, the second sealing framework is fixed in the second sealing rubber body, and the radial outer side of the second sealing rubber body is sequentially provided with a third silt blocking lip, a second silt blocking lip and a first silt blocking lip in an outward protruding mode; the thicknesses of the third silt blocking lip, the second silt blocking lip and the first silt blocking lip are gradually reduced from the roots to the lip ends, a clear water blocking lip is arranged on the inner circumferential surface of the second sealing rubber body in an inward protruding mode, and a protection lip is arranged at the bottom of the second sealing rubber body. The three silt blocking lips are sequentially arranged from outside to inside to form multi-stage blocking, the clear water blocking lip further enhances the waterproof performance, and the bottom protection lip bears stacking pressure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing ring, especially to a light torque automobile wheel hub bearing combined sealing ring. BACKGROUND

[0002] With the development of automobile industry, the wheel hub bearing sealing ring needs to block the invasion of external sand and water at the same time, but the existing sealing ring structure often only adopts two sealing lips, which is difficult to meet the above requirements at the same time, in addition, the sealing lip end is easy to be extruded and deformed when the wheel hub bearing sealing ring is stacked and stored, which leads to the failure and even damage of the lip.

[0003] Therefore, a wheel hub bearing sealing ring with a more perfect structure is needed to enhance the protection effect and protect the lip from damage, and for this purpose, we propose a light torque automobile wheel hub bearing combined sealing ring. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a light torque automobile wheel hub bearing combined sealing ring, three mud blocking lips are arranged from outside to inside to form multi-stage blocking, the water blocking lip further enhances the waterproof performance, the bottom protection lip will bear the stacking pressure, ensure that the lip end is not extruded and contacted, and prolong the reliability of the product during transportation and storage.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A light torque automobile wheel hub bearing combined sealing ring, comprising a first sealing part and a second sealing part, the first sealing part covers the upper end of the second sealing part;

[0007] The first sealing part comprises a first sealing skeleton and a first sealing rubber body;

[0008] The second sealing part comprises a second sealing skeleton and a second sealing rubber body, the second sealing skeleton is fixed inside the second sealing rubber body, a third mud blocking lip, a second mud blocking lip and a first mud blocking lip are sequentially outwardly protruding on the radial outer side of the second sealing rubber body, the thickness of the third mud blocking lip, the second mud blocking lip and the first mud blocking lip gradually narrows from the root to the lip end, a water blocking lip is inwardly protruding on the inner circumferential surface of the second sealing rubber body, and a protection lip is arranged at the bottom of the second sealing rubber body.

[0009] As a preferred scheme of the light torque automobile wheel hub bearing combined sealing ring, the first sealing rubber body is attached to the outer circumferential surface of the first sealing skeleton, and the first sealing rubber body covers the upper and lower end angles of the outer circumferential surface of the first sealing skeleton.

[0010] As a preferred scheme of the light torque automobile wheel hub bearing combined seal ring, the second sealing rubber body is annular structure, the lip end of the third mud and sand blocking lip, the second mud and sand blocking lip and the first mud and sand blocking lip all extend outward along the axial direction.

[0011] As a preferred scheme of the light torque automobile wheel hub bearing combined seal ring, the thickness of the water blocking lip gradually decreases from the root to the lip end, and a gap is arranged between the water blocking lip and the third mud and sand blocking lip.

[0012] As a preferred scheme of the light torque automobile wheel hub bearing combined seal ring, the inclination direction of the water blocking lip is opposite to the inclination direction of the third mud and sand blocking lip, and the inclination angle is smaller than the inclination angle of the third mud and sand blocking lip.

[0013] As a preferred scheme of the light torque automobile wheel hub bearing combined seal ring, the protective lip is composed of a plurality of bosses arranged at intervals in the circumferential direction, and each boss protrudes outward from the bottom of the second sealing rubber body.

[0014] Compared with the prior art, the light torque automobile wheel hub bearing combined seal ring has the following beneficial effects:

[0015] The three mud and sand blocking lips can form multiple blocking channels on the radial outer side, the water blocking lip can further provide waterproof protection, the bottom protective lip can bear pressure when stacked and stored, and direct extrusion to the lip edge is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structure schematic view of a light torque automobile wheel hub bearing combined seal ring.

[0017] Fig. 2 It is a first sealing part schematic view of a light torque automobile wheel hub bearing combined seal ring.

[0018] Fig. 3 It is a second sealing part schematic view of a light torque automobile wheel hub bearing combined seal ring.

[0019] Fig. 4 It is a second sealing rubber body schematic view of a light torque automobile wheel hub bearing combined seal ring.

[0020] Wherein: 1, the first sealing part; 2, the second sealing part; 3, the first sealing framework; 4, the first sealing rubber body; 5, the second sealing framework; 6, the second sealing rubber body; 7, the first mud sand lip; 8, the second mud sand lip; 9, the third mud sand lip; 10, the water blocking lip; 11, the protective lip. DETAILED DESCRIPTION

[0021] In order to make the above objectives, features and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings.

[0022] In the following description, a lot of specific details are set forth in order to facilitate a full and complete understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0023] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0024] Embodiments

[0025] Please refer to Figs. 1 to 4 The present application provides a light torque automobile hub bearing combined sealing ring, which comprises a first sealing part 1 and a second sealing part 2, the first sealing part 1 covers the upper end of the second sealing part 2, the first sealing part 1 comprises a first sealing framework 3 and a first sealing rubber body 4, the first sealing rubber body 4 is attached to the outer circumferential surface of the first sealing framework 3, and the first sealing rubber body 4 covers the upper and lower end angles of the outer circumferential surface of the first sealing framework 3.

[0026] The second sealing part 2 comprises a second sealing skeleton 5 and a second sealing rubber body 6, the second sealing skeleton 5 is fixed inside the second sealing rubber body 6, the radially outer side of the second sealing rubber body 6 is outwardly provided with a third mud and sand blocking lip 9, a second mud and sand blocking lip 8 and a first mud and sand blocking lip 7 in sequence, the thickness of the third mud and sand blocking lip 9, the second mud and sand blocking lip 8 and the first mud and sand blocking lip 7 gradually narrows from the root to the lip end, the inner circumferential surface of the second sealing rubber body 6 is inwardly provided with a clear water blocking lip 10, and the bottom of the second sealing rubber body 6 is provided with a protection lip 11; the three mud and sand blocking lips of the first mud and sand blocking lip 7, the second mud and sand blocking lip 8 and the third mud and sand blocking lip 9 can form multiple blocking channels on the radially outer side; the clear water blocking lip 10 further provides waterproof protection; the bottom protection lip 11 can bear pressure when stacked and stored, so that direct extrusion to the lip edge is avoided, and the reliability of the product during transportation and storage is prolonged;

[0027] The first mud and sand blocking lip 7 is located at the outermost side of the second sealing rubber body 6, the second mud and sand blocking lip 8 is located at the inner side of the first mud and sand blocking lip 7, the third mud and sand blocking lip 9 is located at the inner side of the second mud and sand blocking lip 8, the second sealing rubber body 6 has an annular structure, the lip ends of the third mud and sand blocking lip 9, the second mud and sand blocking lip 8 and the first mud and sand blocking lip 7 extend outward along the axial direction, the outer edge of the first mud and sand blocking lip 7 can be a sharp corner or a circular arc shape, so as to further reduce the contact area with the environment, the protection lip 11 is composed of a plurality of bosses which are arranged at intervals in the circumferential direction, each boss protrudes outward from the bottom of the second sealing rubber body 6, the four lip structures of the first mud and sand blocking lip 7, the second mud and sand blocking lip 8, the third mud and sand blocking lip 9 and the clear water blocking lip 10 are arranged in the same plane and are spaced apart from each other along the axial direction; the protection lip 11 protrudes outward from the bottom of the second sealing rubber body 6 by a certain height, and the height is preferably slightly higher than the height of the sealing lip, so that the protection lip 11 can be in contact with the lower sealing rubber body when the sealing rings are stacked, thereby playing a supporting and protecting role;

[0028] The thickness of the clear water blocking lip 10 gradually decreases from the root to the lip end, a gap is arranged between the clear water blocking lip 10 and the third mud and sand blocking lip 9, and the two are kept apart from each other to form a buffer area of the sealing path, the clear water blocking lip 10 has a small inclination angle, so as to provide an additional water blocking path in structure, the inclination direction of the clear water blocking lip 10 is opposite to that of the third mud and sand blocking lip 9, and the inclination angle is smaller than that of the third mud and sand blocking lip 9.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art can understand that the embodiments can be variously changed, modified, replaced and modified without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A lightweight automotive wheel hub bearing composite sealing ring, characterized in that: It includes a first sealing part (1) and a second sealing part (2), the first sealing part (1) covers the upper end of the second sealing part (2), the first sealing part (1) includes a first sealing skeleton (3) and a first sealing rubber body (4), and the second sealing part (2) includes a second sealing skeleton (5) and a second sealing rubber body (6). The second sealing skeleton (5) is fixed inside the second sealing rubber body (6). The second sealing rubber body (6) is provided with a third mud-blocking lip (9), a second mud-blocking lip (8) and a first mud-blocking lip (7) protruding outward in sequence on the radial outer side. The thickness of the third mud-blocking lip (9), the second mud-blocking lip (8) and the first mud-blocking lip (7) gradually narrows from the root to the lip end. The inner circumference of the second sealing rubber body (6) is provided with a water-blocking lip (10). The bottom of the second sealing rubber body (6) is provided with a protective lip (11).

2. The combined sealing ring for a light-torque automotive wheel hub bearing according to claim 1, characterized in that: The first sealing rubber body (4) is attached to the outer circumferential surface of the first sealing frame (3), and the first sealing rubber body (4) covers the upper and lower corners of the outer circumferential surface of the first sealing frame (3).

3. The combined sealing ring for a light-torque automotive wheel hub bearing according to claim 1, characterized in that: The second sealing rubber body (6) has an annular structure, and the lips of the third mudguard lip (9), the second mudguard lip (8) and the first mudguard lip (7) all extend outward along the axial direction.

4. The combined sealing ring for a light-torque automotive wheel hub bearing according to claim 1, characterized in that: The thickness of the water-blocking lip (10) gradually decreases from the root to the lip tip, and there is a gap between the water-blocking lip (10) and the third mud-blocking lip (9).

5. The lightweight automotive wheel hub bearing combination seal ring according to claim 1, characterized in that: The tilting direction of the water-blocking lip (10) is opposite to that of the tilting direction of the third mud-blocking lip (9), and the tilting angle is smaller than that of the third mud-blocking lip (9).

6. The combined sealing ring for a light-torque automotive wheel hub bearing according to claim 1, characterized in that: The protective lip (11) is composed of multiple protrusions spaced apart along the circumferential direction, each protruding outward from the bottom of the second sealing rubber body (6).

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