A combination oil seal

Abstract

This utility model provides a combined oil seal, including an outer oil seal and an inner oil seal. A washer is provided on one side of the inner oil seal, and several grooves are arranged in a circular array on the side of the washer. A buckle corresponding to the grooves is arranged in an array on the side of the inner oil seal. The inner oil seal is connected to the grooves of the washer via the buckle. The outer oil seal includes an outer frame and a covering sleeve disposed on the outer periphery of the outer frame. The covering sleeve includes a first sealing lip disposed on the inner side of the outer frame and a second sealing lip disposed on the outer side of the outer frame. The first sealing lip is provided with a spring for pressing the inner oil seal. The combined oil seal provided by this utility model, through the contact between the inner ring of the bearing and the washer, plays a corrective role in the assembly of the inner oil seal, preventing the oil seal from easily deviating and improving its durability during use. Due to the first boss, when the inner and outer oil seals rotate relative to each other, the contact area between the inner and outer oil seals is smaller, resulting in less friction when the inner and outer oil seals are in close contact, lower oil seal temperature rise, and increased oil seal durability.

Description

Technical Field

[0001] This utility model relates to the field of oil seal technology, specifically to a combined oil seal. Background Technology

[0002] Wheel hub oil seals are a common type of sealing component used in commercial vehicle axles. They mainly consist of two parts: a sealing lip and a metal skeleton. The sealing lip is typically made of rubber and its function is to contact the shaft or bore wall to form a seal. The metal skeleton, made of steel, provides support and fixation for the sealing lip. It is suitable for sealing requirements under complex operating conditions such as high speed, high temperature, and high pressure. Furthermore, wheel hub oil seals can be designed and selected according to different working conditions and media requirements to achieve better sealing performance.

[0003] However, traditional oil seals are prone to skew after long-term use, which leads to a decrease in the sealing and dustproof effect of the oil seal and poor durability. This solution addresses this technical problem. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a combined oil seal. By having the inner ring of the bearing abut against the washer, the assembly of the inner oil seal is corrected, making the oil seal less prone to misalignment and thus improving its durability during use. With the addition of the boss, when the inner and outer oil seals rotate relative to each other, the contact area between the inner and outer oil seals is smaller, resulting in less friction when they are tightly fitted, lower oil seal temperature rise, and increased oil seal durability.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a combined oil seal, comprising an outer oil seal and an inner oil seal, wherein a gasket is provided on one side of the inner oil seal, and a plurality of slots are arranged in a circular array on the side of the gasket, and buckles corresponding to the slots are arranged in an array on the side of the inner oil seal, and the inner oil seal is connected to the slots of the gasket through the buckles; the outer oil seal comprises an outer skeleton and a covering sleeve disposed on the outer periphery of the outer skeleton, the covering sleeve comprising a sealing lip one disposed on the inner side of the outer skeleton and a sealing lip two disposed on the outer side of the outer skeleton, and the sealing lip one being provided with a spring for pressing the inner oil seal.

[0006] The inner oil seal includes an inner skeleton, a dustproof lip disposed on the outer edge of the inner skeleton, and a sealing sleeve disposed on the inner side of the inner skeleton. The dustproof lip is tightly fitted to the inner side of the outer skeleton, and the buckle array is disposed on the inner skeleton.

[0007] The inner side of the sealing lip is provided with a groove for accommodating the spring, and the spring is sleeved in the groove of the sealing lip. The outer side of the sealing lip is provided with a main lip and a secondary lip that fit closely with the inner skeleton.

[0008] The dustproof lip has several protrusions arranged in a ring array on its side, and the protrusions are in close contact with the side of the outer frame.

[0009] The side array of the sealing lip is provided with a plurality of protrusions, and the cross-section of the plurality of protrusions is trapezoidal.

[0010] The inner side of the sealing sleeve is provided with a corrugated part, and the edge of the sealing sleeve is provided with a snap-fit ​​groove.

[0011] The side array of the sealing sleeve is provided with several rectangular grooves.

[0012] The side array of the covering sleeve is provided with several rectangular grooves.

[0013] The outer side of the washer is provided with an arc-shaped opening.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) By abutting the inner ring of the bearing with the washer, the assembly of the inner oil seal is corrected, the oil seal is not easy to deviate, thus improving the durability of the oil seal during use. With the setting of boss one, when the inner oil seal and the outer oil seal rotate relative to each other, the contact area between the inner oil seal and the outer oil seal is smaller, the friction is smaller when the inner oil seal and the outer oil seal are tightly attached, the oil seal temperature rise is lower, and the durability of the oil seal is increased.

[0016] (2) The dustproof lip faces the mud and water side, which is conducive to the oil seal protecting the mud and water. The sealing lip is equipped with a main lip and a secondary lip, which simultaneously contact the inner skeleton of the inner oil seal to perform multiple seals, thereby improving the sealing effect of the oil seal. Attached Figure Description

[0017] Figure 1 This is a partial cross-sectional structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the external oil seal of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal oil seal of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the washer of this utility model;

[0021] Figure 5 This is a schematic diagram of the assembly structure of this utility model.

[0022] In the diagram: 1. Outer oil seal; 11. Outer skeleton; 12. Sealing lip one; 121. Main lip; 122. Secondary lip; 13. Sealing lip two; 14. Rectangular groove two; 15. Boss two; 2. Inner oil seal; 21. Inner skeleton; 211. Snap-fit; 22. Dustproof lip; 221. Boss one; 23. Sealing sleeve; 231. Corrugated part; 232. Snap-fit ​​groove; 233. Rectangular groove one; 3. Washer; 31. Snap-fit ​​groove; 32. Arc-shaped opening; 4. Spring; 5. Oil seal seat ring. Detailed Implementation

[0023] To more clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0024] See Figures 1-5 A combined oil seal includes an outer oil seal 1 and an inner oil seal 2. A washer 3 is provided on one side of the inner oil seal 2. The side of the washer 3 is provided with a plurality of slots 31 arranged in a ring array. The side of the inner oil seal 2 is provided with buckles 211 corresponding to the slots 31. The inner oil seal 2 is connected to the slots 31 of the washer 3 through the buckles 211. The outer oil seal 1 includes an outer frame 11 and a covering sleeve provided on the outer periphery of the outer frame 11. The covering sleeve includes a sealing lip 12 provided on the inner side of the outer frame 11 and a sealing lip 23 provided on the outer side of the outer frame 11. The sealing lip 23 is toothed. The sealing lip 12 is provided with a spring 4 for pressing the inner oil seal 2.

[0025] The inner oil seal 2 includes an inner skeleton 21, a dustproof lip 22 disposed on the outer edge of the inner skeleton 21, and a sealing sleeve 23 disposed on the inner side of the inner skeleton 21. The dustproof lip 22 is tightly attached to the inner side of the outer skeleton 11, and the buckles 211 are arranged in an array on the inner skeleton 21.

[0026] The inner side of the sealing lip 12 is provided with a groove for accommodating the spring 4. The spring 4 is sleeved in the groove of the sealing lip 12. The outer side of the sealing lip 12 is provided with a main lip 121 and a secondary lip 122 that are in close contact with the inner skeleton 21.

[0027] The side of the dustproof lip 22 is provided with a number of protrusions 221 arranged in a ring array, and the protrusions 221 are closely attached to the side of the outer frame 11.

[0028] The side array of the sealing lip 2 13 is provided with a number of bosses 2 15, and the cross-section of the bosses 2 15 is trapezoidal.

[0029] The inner side of the sealing sleeve 23 is provided with a corrugated part 231, and the edge of the sealing sleeve 23 is provided with a snap-fit ​​groove 232.

[0030] The side of the sealing sleeve 23 is provided with several rectangular grooves 233.

[0031] The side array of the covering sleeve is provided with several rectangular slots 14.

[0032] The outer side of the washer 3 is provided with an arc-shaped opening 32.

[0033] The specific working process of this utility model:

[0034] During assembly, the oil seal is first installed on the oil seal seat 5. Specifically, the corrugated part 231 of the sealing sleeve 23 is made to fit against the outer surface of the oil seal seat 5. Then, the bearing is installed so that the inner ring of the bearing rests on the washer 3. The washer 3 is tightly connected to the snap 211 of the inner oil seal 2 through the groove 31. The contact between the inner ring of the bearing and the washer 3 plays a corrective role in the assembly of the inner oil seal 2, making the oil seal less prone to misalignment, thereby improving the durability of the oil seal during use. Due to the setting of the boss 221, when the inner oil seal 2 and the outer oil seal 1 rotate relative to each other, the contact area between the inner oil seal 2 and the outer oil seal 1 is smaller, and the inner oil seal 2 and the outer oil seal 1 are more likely to rotate. When the outer oil seal 1 is tightly sealed, the friction is smaller and the oil seal temperature rise is lower, which increases the durability of the oil seal. The dustproof lip 22 faces the mud and water side, which helps the oil seal protect against mud and water. The sealing lip 12 is provided with a main lip 121 and a secondary lip 122, which simultaneously contact the inner skeleton 21 of the inner oil seal 2 to perform multiple seals, which improves the sealing effect of the oil seal. The sealing lip 23 is toothed and seals through multiple toothed rings, which further improves the sealing effect. When the oil seal is disassembled, the inner oil seal 2 is pulled out of the oil seal seat ring 5 by the washer 3, and the inner oil seal 2 is pulled out of the outer oil seal 1 by the spring 4, which improves the convenience of disassembly.

[0035] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A combined oil seal comprising an outer oil seal (1) and an inner oil seal (2), characterized in that, The inner oil seal (2) is provided with a washer (3) on one side. The side of the washer (3) is provided with a plurality of slots (31) in a ring array. The side of the inner oil seal (2) is provided with buckles (211) corresponding to the slots (31). The inner oil seal (2) is connected to the slots (31) of the washer (3) through the buckles (211). The outer oil seal (1) includes an outer skeleton (11) and a cover sleeve provided on the outer periphery of the outer skeleton (11). The cover sleeve includes a sealing lip one (12) provided on the inner side of the outer skeleton (11) and a sealing lip two (13) provided on the outer side of the outer skeleton (11). The sealing lip one (12) is provided with a spring (4) for pressing the inner oil seal (2).

2. A combination oil seal as claimed in claim 1, wherein, The inner oil seal (2) includes an inner skeleton (21), a dustproof lip (22) disposed on the outer edge of the inner skeleton (21), and a sealing sleeve (23) disposed on the inner side of the inner skeleton (21). The dustproof lip (22) is tightly attached to the inner side of the outer skeleton (11), and the buckle (211) array is disposed on the inner skeleton (21).

3. A combination oil seal as claimed in claim 2, wherein, The inner side of the sealing lip (12) is provided with a groove for accommodating the spring (4), and the spring (4) is sleeved in the groove of the sealing lip (12). The outer side of the sealing lip (12) is provided with a main lip (121) and a secondary lip (122) that are in close contact with the inner skeleton (21).

4. A combination oil seal as claimed in claim 2, wherein, The dustproof lip (22) has a number of protrusions (221) arranged in a ring array on its side, and the protrusions (221) are closely attached to the side of the outer frame (11).

5. A combination oil seal as claimed in claim 1, wherein, The side array of the sealing lip (13) is provided with a plurality of bosses (15), and the cross-section of the plurality of bosses (15) is trapezoidal.

6. A combined oil seal as described in claim 2, characterized in that, The inner side of the sealing sleeve (23) is provided with a corrugated part (231), and the edge of the sealing sleeve (23) is provided with a snap-fit ​​groove (232).

7. A combined oil seal as described in claim 6, characterized in that, The side array of the sealing sleeve (23) is provided with several rectangular grooves (233).

8. A combined oil seal as described in claim 1, characterized in that, The side array of the covering sleeve is provided with several rectangular slots (14).

9. A combined oil seal as described in claim 1, characterized in that, The outer side of the washer (3) is provided with an arc-shaped opening (32).

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