Oil seal structure for hub bearing of truck

Abstract

The utility model discloses an oil seal structure for a truck hub bearing, and relates to the technical field of oil seals. Comprising an inner oil seal and an outer oil seal, the inner oil seal comprises an inner framework and a first sealing piece wrapping the outer side of the inner framework, a limiting groove is formed in one side of the sealing piece, an inner ring of the first sealing piece extends to the inner side of the inner framework and is provided with a main sealing lip, and a plurality of outer sealing lips are arranged on an outer ring of the first sealing piece. The inner framework and the outer framework are both formed through extrusion, the surface roughness and hardness can be improved, the service life of the oil seal is prolonged, the inner side of the outer framework is matched with the limiting part to effectively store grease, the inner oil seal and the outer oil seal rotate more flexibly relative to a piece, abrasion is improved, extrusion forming is adopted, the turning procedure is omitted, the procedures are reduced, and meanwhile the machining efficiency is improved. The turnover frequency and the storage time are reduced, the production cycle of the whole product is shortened, economic benefits are improved, and the waterproof and dustproof effects of the product are guaranteed through the arrangement of the dustproof lip, the first auxiliary sealing lip and the second auxiliary sealing lip.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to an oil seal structure for a truck hub bearing. Background Technique

[0002] An oil seal is the customary name for a general seal. Simply put, it is the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system and also generally refers to general liquid substances). It isolates the components that need to be lubricated in the transmission components from the output components, so as to prevent the lubricating oil from leaking. The seals used for static seals and dynamic seals are called oil seals, which are mostly used in automobiles and agricultural machinery. Different machines require different types of oil seals.

[0003] The oil seal of the truck hub bearing is relatively large in size. On the market, the surface profile of the oil seal bushing is mostly changed; while reducing the manufacturing process, shortening the production cycle, and reducing costs. The service life of the oil seal and the processing difficulty are improved. Content of the Utility Model

[0004] The utility model provides an oil seal structure for a truck hub bearing to solve the problems in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An oil seal structure for a truck hub bearing, including an inner oil seal and an outer oil seal. The inner oil seal includes an inner skeleton and a seal member one coated on the outer side of the inner skeleton. A limiting groove is arranged on one side of the seal member. The inner circle of the seal member one extends to the inner side of the inner skeleton and is provided with a main sealing lip. A plurality of outer sealing lips are arranged on the outer circle of the seal member one;

[0006] The outer oil seal includes an outer skeleton and a seal member two coated on the outer side of the outer skeleton. The outer circles of the outer skeleton and the inner skeleton are both movably sleeved inside the limiting groove. A plurality of inner sealing lips are arranged on the inner circle of the seal member two.

[0007] Further, the inner circle of the outer skeleton extends to one side of the main sealing lip and is provided with a limiting part.

[0008] Further, it also includes a spring. The spring is movably sleeved on the seal member one. The spring is located outside the main sealing lip.

[0009] Further, a plurality of dust-proof lips are arranged on one side of the seal member one.

[0010] Further, a first secondary sealing lip is arranged on one side of the seal member one outside the dust-proof lip. The number of the first secondary sealing lips is not less than one.

[0011] Further, a plurality of second secondary sealing lips are arranged on one side of the inner wall of the limiting groove.

[0012] Further, it further includes a positioning member, the positioning member is arranged between two adjacent inner sealing lips, and the number of the positioning members is not less than one.

[0013] Further, the surface roughness of the inner skeleton and the outer skeleton is 0.2Ra - 0.8Ra.

[0014] Further, both the inner skeleton and the outer skeleton are formed by extrusion.

[0015] Compared with the prior art, the present utility model provides an oil seal structure for a truck hub bearing, having the following beneficial effects:

[0016] For the oil seal structure for the truck hub bearing, both the inner skeleton and the outer skeleton are formed by extrusion, which can improve the surface roughness and hardness, and prolong the service life of the oil seal. The inner side of the outer skeleton is matched with the limiting part, which can effectively store grease. The relative rotation of the inner oil seal and the outer oil seal is more flexible, improving wear. And by adopting extrusion molding, the turning process is removed, reducing the number of processes, turnover times and storage time. The production cycle of the whole product is shortened, improving economic benefits. The settings of the dust-proof lip, the first secondary sealing lip and the second secondary sealing lip ensure the waterproof and dust-proof effects of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of the present utility model;

[0018] Figure 2 is a side view of the structure of the present utility model;

[0019] Figure 3 is a sectional view of the structure of the present utility model.

[0020] In the figure: 1, inner oil seal; 11, inner skeleton; 12, seal member one; 13, main sealing lip; 14, limiting groove; 15, dust-proof lip; 16, first secondary sealing lip; 17, second secondary sealing lip; 18, outer sealing lip; 19, spring; 2, outer oil seal; 21, outer skeleton; 22, seal member two; 23, limiting part; 24, inner sealing lip; 25, positioning member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 3, the present utility model discloses an oil seal structure for a truck hub bearing, which includes an inner oil seal 1 and an outer oil seal 2. The inner oil seal 1 includes an inner skeleton 11 and a first sealing member 12 covering the outside of the inner skeleton 11. A limiting groove 14 is provided on one side of the sealing member. The inner ring of the first sealing member 12 extends to the inside of the inner skeleton 11 and is provided with a main sealing lip 13. A plurality of outer sealing lips 18 are provided on the outer ring of the first sealing member 12.

[0023] The outer oil seal 2 includes an outer skeleton 21 and a second sealing member 22 covering the outside of the outer skeleton 21. The outer rings of both the outer skeleton 21 and the inner skeleton 11 are movably sleeved inside the limiting groove 14. A plurality of inner sealing lips 24 are provided on the inner ring of the second sealing member 22.

[0024] Specifically, the inner ring of the outer skeleton 21 extends to one side of the main sealing lip 13 and is provided with a limiting portion 23. The setting of the limiting portion 23 can limit one side of the main sealing lip 13 and reduce the leakage of lubricating grease at the same time.

[0025] Specifically, it further includes a spring 19. The spring 19 is movably sleeved on the first sealing member 12 and is located outside the main sealing lip 13.

[0026] Specifically, a plurality of dust-proof lips 15 are provided on one side of the first sealing member 12. The setting of multiple dust-proof lips 15 ensures the sealing performance of the product.

[0027] Specifically, a first secondary sealing lip 16 is provided on one side of the first sealing member 12 outside the dust-proof lips 15. The number of the first secondary sealing lips 16 is not less than one. A plurality of second secondary sealing lips 17 are provided on one side of the inner wall of the limiting groove 14. Lubricating grease is filled between the main sealing lip 13 and the first secondary sealing lip 16 on its one side, making the relative sliding between the inner oil seal 1 and the outer oil seal 2 more smooth.

[0028] Specifically, it further includes a positioning member 25. The positioning member 25 is arranged between two adjacent inner sealing lips 24. The number of the positioning members 25 is not less than one. The setting of the positioning member 25 can assist in controlling the distance between two adjacent inner sealing lips 24 and ensure the stability and sealing performance of the contact surface between the inner sealing lips 24 and the shaft.

[0029] Specifically, the surface roughness of the inner skeleton 11 and the outer skeleton 21 is 0.2Ra - 0.8Ra. Both the inner skeleton 11 and the outer skeleton 21 are formed by extrusion. This can improve the surface roughness and hardness, reduce wear, and increase the service life of the oil seal. The pits on the surface can effectively store grease and reduce wear. Moreover, by using extrusion molding, the turning process is removed, reducing the number of processes, turnover times, and storage time. The production cycle of the entire product is shortened, and economic benefits are improved.

[0030] In summary, for the oil seal structure used in the truck hub bearing, the inner skeleton 11 and the outer skeleton 21 are both formed by extrusion, which can improve the surface roughness and hardness, and extend the service life of the oil seal. The inner side of the outer skeleton 21 is provided with a limiting part 23, which can effectively store grease. The relative rotation between the inner oil seal 1 and the outer oil seal 2 is more flexible, improving wear. Moreover, by using extrusion molding, the turning process is eliminated, reducing the number of processes, turnover times and storage time. The production cycle of the whole product is shortened, improving economic efficiency. The settings of the dust-proof lip 15, the first secondary seal lip 16 and the second secondary seal lip 17 ensure the waterproof and dust-proof effects of the product.

[0031] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil seal structure for a truck hub bearing, comprising an inner oil seal (1) and an outer oil seal (2), characterized in that: The inner oil seal (1) includes an inner skeleton (11) and a first seal member (12) covering the outside of the inner skeleton (11). A limiting groove (14) is provided on one side of the seal member. The inner ring of the first seal member (12) extends to the inside of the inner skeleton (11) and is provided with a main seal lip (13). A plurality of outer seal lips (18) are provided on the outer ring of the first seal member (12). The outer oil seal (2) includes an outer skeleton (21) and a second seal member (22) covering the outside of the outer skeleton (21). The outer rings of the outer skeleton (21) and the inner skeleton (11) are both movably sleeved inside the limiting groove (14). A plurality of inner seal lips (24) are provided on the inner ring of the second seal member (22).

2. The oil seal structure for a truck hub bearing according to claim 1, characterized in that: The inner ring of the outer skeleton (21) extends to one side of the main seal lip (13) and is provided with a limiting portion (23).

3. The oil seal structure for a truck wheel hub bearing according to claim 1, characterized in that: It further includes a spring (19). The spring (19) is movably sleeved on the first seal member (12). The spring (19) is located outside the main seal lip (13).

4. A lip seal structure for a truck hub bearing according to claim 1, characterized in that: A plurality of dust-proof lips (15) are provided on one side of the first seal member (12).

5. The oil seal structure for a truck wheel hub bearing according to claim 1, characterized in that: A first secondary seal lip (16) is provided on one side of the first seal member (12) and is located outside the dust-proof lips (15). The number of the first secondary seal lips (16) is not less than one.

6. The oil seal structure for a truck wheel hub bearing according to claim 1, wherein: A plurality of second secondary seal lips (17) are provided on one side of the inner wall of the limiting groove (14).

7. The oil seal structure for a truck wheel hub bearing according to claim 1, characterized in that: It further includes a positioning member (25). The positioning member (25) is arranged between two adjacent inner seal lips (24). The number of the positioning members (25) is not less than one.

8. The oil seal structure for a truck hub bearing according to claim 1, characterized in that: The surface roughness of the inner skeleton (11) and the outer skeleton (21) is 0.2Ra - 0.8Ra.

9. The oil seal structure for a truck hub bearing according to claim 1, characterized in that: The inner skeleton (11) and the outer skeleton (21) are both formed by extrusion.

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