Hub oil seal structure

Abstract

A hub oil seal structure comprises a supporting framework, an inner oil seal and an outer oil seal, the inner oil seal is arranged on the inner side of the supporting framework, the outer oil seal is arranged on the outer side of the supporting framework, the lower end of the outer oil seal is movably connected with a main lip, the lower end of the main lip is fixedly connected with a first auxiliary lip, the lowermost end of the main lip is fixedly connected with a second auxiliary lip, and the second auxiliary lip is fixedly connected with the second auxiliary lip. And a fitting groove is fixedly formed in the front end of the second auxiliary lip. According to the hub oil seal structure, the second auxiliary lip is additionally arranged on the original basis, the annular grooves are reserved in the second auxiliary lip, the lubricating grease is injected into the lubricating cavity between the first auxiliary lip and the second auxiliary lip, the second auxiliary lip and the shaft of the hub are in an interference state, lubrication between the rubber main lip and the shaft is guaranteed through the lubricating grease, and the service life of the hub is prolonged. After the outermost annular groove is worn after being used for a period of time, the other rear annular grooves can be sequentially attached to the shaft to be closely attached to the shaft all the time, so that the protection performance of the oil seal is greatly enhanced, and the service life of the oil seal is prolonged by times.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil seal structure technical field especially relates to a wheel hub oil seal structure. BACKGROUND

[0002] Oil seal is the customary appellation of general seal, simply say is the seal of lubricating oil, it is the mechanical element for sealing grease (oil is the most common liquid substance in transmission system, also refers to the general liquid substance), it separates the part needing lubrication in transmission part and the output part, so as to prevent lubricating oil from leaking, and the seal for static seal and dynamic seal is called oil seal.

[0003] For example, the wheel hub oil seal structure with the authorization announcement number CN215720832U locks the oil seal body, the oil seal body will not deform greatly, the first spring can ensure the sealing property of the oil seal body during use, can be used with the object, and improves the use performance of the oil seal.

[0004] However, the wheel hub oil seal structure still has some problems during use, for example, the service life of the existing oil seal structure is short when used in the mine wheel hub oil seal, and the main reason for the short service life is that the service condition of the mine oil seal is very poor, there are a lot of mud and dust from the outside, which easily invades the oil seal and causes serious wear to the oil seal lip, resulting in oil leakage. The original wheel hub oil seal structure is usually in the form of an inner and outer oil seal combination, and the outer oil seal has a certain blocking effect on foreign matter and impurities from the outside. When the outer protective lip is worn, the use performance of the inner oil seal oil seal lip will be affected, causing the risk of oil leakage. SUMMARY

[0005] The utility model solves the above-mentioned problems existing in the prior art and provides a wheel hub oil seal structure that can improve the service life.

[0006] The utility model solves the technical scheme adopted by the technical problem:

[0007] A wheel hub oil seal structure is designed, which comprises a support framework, an inner oil seal and an outer oil seal. The inner oil seal is arranged on the inner side of the support framework, and the outer oil seal is arranged on the outer side of the support framework. The lower end of the outer oil seal is movably connected with a main lip, the lower end of the main lip is fixedly connected with a first auxiliary lip, the lowermost end of the main lip is fixedly connected with a second auxiliary lip, and a fitting groove is fixedly arranged at the front end of the second auxiliary lip.

[0008] Further improvement, the inner side of the fitting groove is movably connected with an annular groove, the front end of the first auxiliary lip is movably connected with a sealing groove, and a lubricating cavity is fixedly arranged between the first auxiliary lip and the second auxiliary lip.

[0009] Further improvement, the inside of the lubricating cavity is provided with lubricating grease.

[0010] Further improvement, the other side of the main lip is fixedly provided with a spring slot, and a spring is movably arranged in the inner side of the spring slot.

[0011] Further improvement, the inner side of the outer oil seal is movably connected with an oil baffle, and the inner side of the oil baffle is fixedly connected with the lower end of the support framework.

[0012] Further improvement, the end of the outer oil seal is movably connected with the inner side of the main lip, and the inner side of the outer oil seal is fixedly provided with a sealing cavity.

[0013] The novel oil seal structure of the utility model has the beneficial effects that: the novel oil seal structure of the utility model increases a second secondary lip on the basis of the original structure, and a plurality of annular grooves are reserved on the second secondary lip, grease is injected in the lubricating cavity between the first secondary lip and the second secondary lip, the second secondary lip is in an interference state with the shaft of the wheel hub, the grease ensures the lubrication between the rubber main lip and the shaft, reduces abrasion and heating, when the outermost annular groove is abraded after being used for a period of time, the annular grooves on the rear side will be sequentially attached to the shaft, so that the annular grooves are always closely attached to the shaft, thereby greatly enhancing the protection performance of the oil seal, and the service life of the oil seal is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an internal structure sectional view of the utility model;

[0015] Figure 2 It is an A part enlarged schematic view of Figure 1

[0016] Figure 3 It is a B part enlarged schematic view of Figure 1

[0017] Reference signs in the drawing: 1, support framework, 2, inner oil seal, 3, outer oil seal, 4, spring, 5, grease, 6, spring slot, 7, main lip, 8, first secondary lip, 9, sealing groove, 10, second secondary lip, 11, attachment groove, 12, annular groove, 13, lubricating cavity, 14, oil baffle, 15, sealing cavity. DETAILED DESCRIPTION

[0018] The utility model will be further described in connection with the drawings:

[0019] Refer to the attached Figures 1-3 ​​In this embodiment, a hub oil seal structure includes a support framework 1, an inner oil seal 2 and an outer oil seal 3. The inner oil seal 2 is arranged on the inner side of the support framework 1, and the purpose of the inner oil seal 2 is to seal the lubricating oil in the cavity. The support framework 1 is made of aluminum alloy material, which has strong strength and toughness. The outer oil seal 3 is arranged on the outer side of the support framework 1, and the purpose of the outer oil seal 3 is to seal the impurities such as dust and water outside the cavity. The lower end of the outer oil seal 3 is movably connected with a main lip 7. The lower end of the main lip 7 is fixedly connected with a first secondary lip 8. The lowermost end of the main lip 7 is fixedly connected with a second secondary lip 10. The front end of the second secondary lip 10 is fixedly provided with a fitting groove 11.

[0020] The new oil seal structure increases a second secondary lip 10 on the basis of the original structure. A plurality of annular grooves 12 are arranged on the second secondary lip 10. Grease 5 is injected into a lubricating cavity 13 between the first secondary lip 8 and the second secondary lip 10. The second secondary lip 10 is in an interference state with the shaft of the hub. The grease 5 ensures the lubrication between the rubber main lip 7 and the shaft, reduces wear and heat generation. When the outermost annular groove 12 is worn after a period of use, the other rear annular grooves 12 will be sequentially fitted on the shaft, so that they are always closely fitted together with the shaft, thereby greatly enhancing the protection performance of the oil seal and greatly improving the service life of the oil seal.

[0021] The inner side of the plurality of fitting grooves 11 is movably connected with the annular grooves 12. The front end of the first secondary lip 8 is movably connected with a sealing groove 9. The first secondary lip 8 and the second secondary lip 10 are fixedly provided with the lubricating cavity 13. The lubricating cavity 13 is provided with the grease 5.

[0022] The other side of the main lip 7 is fixedly provided with a spring groove 6. The inner side of the spring groove 6 is movably provided with a spring 4. The spring 4 is arranged in the spring groove 6. The spring 4 is made of stainless steel material and has good elasticity. The spring 4 can provide necessary compensation during use of the oil seal, enhance the radial force of the oil seal, and ensure that the oil seal can maintain good sealing effect under various working conditions. At the same time, the spring 4 clamps the oil seal on the shaft, ensuring that the oil seal will not loosen, thereby improving the sealing performance of the component.

[0023] This fixing action helps to prevent the leakage of oil, water or chemical liquid, and the invasion of external dust and sand. Over time, the rubber part of the oil seal may be subject to fatigue loss, affecting the sealing effect. The clamping force of the spring 4 can compensate for this fatigue loss, ensuring that the sealing member continuously maintains a sealed state, prolonging the use time. The inner side of the outer oil seal 3 is movably connected with an oil baffle 14. The inner side of the oil baffle 14 is fixedly connected with the lower end of the support framework 1. The end of the outer oil seal 3 is movably connected with the inner side of the main lip 7. The inner side of the outer oil seal 3 is fixedly provided with a sealing cavity 15. The sealing cavity 15 stores lubricating oil.

[0024] Working principle:

[0025] The hub oil seal plays a vital role in automobile maintenance, its main function is to prevent the leakage of lubricating oil and dust intrusion, so as to ensure the lubrication state of the friction parts, prolong its service life. The oil seal is widely used in various key parts of the automobile, such as the front and rear oil seals of the crankshaft of the engine, the valve oil seal, the camshaft oil seal and the front and rear oil seals of the transmission

[0026] The new oil seal structure increases a second secondary lip 10 on the basis, and a plurality of annular grooves 12 are left on the second secondary lip 10, grease 5 is injected in the lubricating cavity 13 between the first secondary lip 8 and the second secondary lip 10, the second secondary lip 10 is in an interference state with the shaft of the hub, the grease 5 ensures the lubrication between the rubber main lip 7 and the shaft, less wear and heat, when the outermost annular groove 12 is worn after a period of use, the other annular grooves 12 on the rear side will be in turn attached to the shaft, so that it is always closely attached to the shaft together, thereby greatly enhancing the protection performance of the oil seal, and the service life of the oil seal is multiplied;

[0027] The spring 4 is arranged in the spring groove 6, the spring 4 is made of stainless steel metal material, has good elasticity, and can provide necessary compensation through the spring 4 during use of the oil seal, enhance the radial force of the oil seal, ensure that the oil seal can maintain good sealing effect under various working conditions, meanwhile, the spring 4 clamps the oil seal on the shaft, ensures that the oil seal will not be loose, thereby improving the sealing performance of the component, the fixing effect is helpful to prevent the outflow of oil, water or chemical liquid, and the intrusion of external dust and sand, with the elapse of time, the rubber part of the oil seal may be subject to fatigue loss, affect the sealing effect, the clamping force of the spring 4 can compensate the fatigue loss, ensure that the sealing member continuously maintains the sealing state, prolongs the use time;

[0028] The new structure oil seal has the unique performance of preventing dust and sand, not only improves the oil sealing and protection ability of the product itself, but also improves the running safety guarantee of the whole vehicle, reduces the maintenance and maintenance cost of the whole vehicle.

[0029] Although the utility model has been illustrated and described by referring to the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details can be made within the scope of the claims.

Claims

1. A hub oil seal structure, comprising a support frame (1), an inner oil seal (2), and an outer oil seal (3), wherein the inner oil seal (2) is disposed on the inner side of the support frame (1), and the outer oil seal (3) is disposed on the outer side of the support frame (1), characterized in that: The lower end of the outer oil seal (3) is movably connected to a main lip (7), the lower end of the main lip (7) is fixedly connected to a first secondary lip (8), the lowermost end of the main lip (7) is fixedly connected to a second secondary lip (10), and the front end of the second secondary lip (10) is fixedly provided with a fitting groove (11).

2. The hub oil seal structure according to claim 1, characterized in that: The inner sides of the plurality of fitting grooves (11) are movably connected to an annular groove (12), the front end of the first secondary lip (8) is movably connected to a sealing groove (9), and a lubrication cavity (13) is fixedly opened between the first secondary lip (8) and the second secondary lip (10).

3. The hub oil seal structure according to claim 2, characterized in that: The lubrication cavity (13) is provided with grease (5).

4. The hub oil seal structure according to claim 1, characterized in that: A spring groove (6) is fixedly provided on the other side of the main lip (7), and a spring (4) is movably provided on the inner side of the spring groove (6).

5. The hub oil seal structure according to claim 1, characterized in that: An oil baffle (14) is movably connected to the inner side of the outer oil seal (3), and the interior of the oil baffle (14) is fixedly connected to the lower end of the support frame (1).

6. The hub oil seal structure according to claim 1, characterized in that: The end of the outer oil seal (3) is movably connected to the inner side of the main lip (7), and a sealing cavity (15) is fixedly opened inside the outer oil seal (3).

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