Framework oil seal sealing ring structure

Abstract

The utility model discloses a framework oil seal sealing ring structure which comprises a main body, a sealing ring and a sealing ring, the main body comprises an outer ring and an inner ring, and the axial size of the inner ring is larger than that of the outer ring; the main body is of an annular structure made of a rubber material; the outer ring and the inner ring are of an integrally-formed structure. An annular dustproof lip is arranged on the inner side of the inner ring and located at the end, located in the range of the outer ring, of the inner ring. An annular sealing lip is arranged at one end, far away from the dustproof lip, of the inner side of the inner ring; an annular spring is arranged at the position, corresponding to the sealing lip, of the outer side of the inner ring, and the spring is embedded in the outer side of the inner ring. As the distance between the sealing lip and the outer ring and the framework is increased, the spring can better drive the sealing lip to contract inwards, the sealing effect of the sealing ring can be guaranteed all the time, and therefore the service life of the sealing ring can be prolonged.

Description

Technical Field

[0001] This application relates to the field of sealing technology, and particularly to a structure of a skeleton oil seal ring. Background Art

[0002] A skeleton oil seal is a sealing element. The function of the oil seal is to isolate the components that need lubrication in the transmission components from the external environment, prevent the leakage of lubricating oil inside the components, and prevent substances such as dust from entering. The skeleton is like the steel bars in a concrete component, playing a strengthening role and enabling the oil seal to maintain its shape and tension. Skeleton oil seals can be classified into single-lip skeleton oil seals and double-lip skeleton oil seals according to their structural forms. Among them, the secondary lip of the double-lip skeleton oil seal plays a dust-proof role, preventing external dust, impurities, etc. from entering the machine interior.

[0003] In the existing technology, the inner ring height of the skeleton oil seal ring does not exceed the outer ring height (the axial dimension of the inner ring cantilever is smaller than the axial dimension of the outer ring rubber body). The inner ring is tightened by a spring, and automatic compensation can be achieved after the radial sealing lip wears; however, in the existing technology of skeleton oil seals, due to the smaller axial dimension of the inner ring, the inner ring cantilever is greatly affected by the outer ring and the skeleton, resulting in a smaller reaction force of the inner ring; therefore, after the sealing lip wears, the sealing performance of the existing skeleton oil seal will rapidly decline, resulting in a shorter service life. Utility Model Content

[0004] The main purpose of this application is to propose a structure of a skeleton oil seal ring, aiming to solve the problem that the sealing performance of the existing skeleton oil seal rapidly declines after the sealing lip wears.

[0005] To achieve the above object, the structure of the skeleton oil seal ring proposed in this application includes: a main body, the main body includes an outer ring and an inner ring, and is characterized in that the axial dimension of the inner ring is greater than the axial dimension of the outer ring, and a sealing lip is provided at one end of the inner ring that extends beyond the outer ring range on the inner side.

[0006] Optionally, the main body is a circular ring structure made of rubber material.

[0007] Optionally, the outer ring and the inner ring are integrally formed structures.

[0008] Optionally, an annular dust-proof lip is provided on the inner side of the inner ring, and the dust-proof lip is located at one end of the inner ring within the outer ring range.

[0009] Optionally, the sealing lip is a first sealing lip, and the first sealing lip is provided at one end of the inner ring that extends beyond the outer ring range on the inner side.

[0010] Optionally, a circular first spring is provided on the outer side of the inner ring corresponding to the first sealing lip, and the first spring is a circular spring, and the first spring is embedded on the outer side of the inner ring.

[0011] Optionally, the sealing lip is two second sealing lips, and the two second sealing lips are located at one end of the inner ring extending out of the outer ring range on the inner side of the inner ring.

[0012] Optionally, a ring-shaped second spring is arranged on the outer side of the inner ring corresponding to the two second sealing lips. The second spring is a square spring and is embedded on the outer side of the inner ring.

[0013] Optionally, an annular skeleton is arranged inside the outer ring. The cross-section of the skeleton is an L-shaped structure, and the skeleton is used to support the main body.

[0014] By increasing the axial dimension of the inner ring in the technical solution of the present application, the sealing lip and the spring are separated from the outer ring and the skeleton, reducing the influence of the supporting force of the outer ring and the skeleton on the sealing lip, enabling the sealing lip to closely adhere to the intermediate component under the action of the spring, thereby enhancing the sealing effect of the sealing ring. When the sealing lip is worn, due to the increased distance between the sealing lip and the outer ring and the skeleton, the spring can better drive the sealing lip to contract inward, always ensuring the sealing effect of the sealing ring, and thus extending the service life of the sealing ring. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0016] Figure 1 It is a schematic structural diagram of a skeleton oil seal ring in the prior art;

[0017] Figure 2 It is a three-dimensional structural diagram of the skeleton oil seal ring structure of the present application;

[0018] Figure 3 It is a cross-sectional structural diagram of the first embodiment of the skeleton oil seal ring structure of the present application;

[0019] Figure 4 It is a cross-sectional structural diagram of the second embodiment of the skeleton oil seal ring structure of the present application.

[0020] Explanation of the reference numerals in the drawings:

[0021] 1. Main body; 110. Outer ring; 120. Inner ring; 121. Dust-proof lip; 122. First sealing lip; 123. Second sealing lip; 2. Skeleton; 3. First spring; 4. Second spring.

[0022] The realization, functional features, and advantages of the present application will be further described in conjunction with embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly disposed on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0025] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0027] It should be noted that the structures, ratios, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of this application. Therefore, they do not have any technical substance. Any modification of the structure, change of the ratio relationship, or adjustment of the size, without affecting the efficacy that this application can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover.

[0028] Reference Figure 1 , in the prior art, the height of the inner ring 520 of the skeleton oil seal ring does not exceed the height of the outer ring 510. The inner ring 520 is tightened by a spring 7, and automatic compensation can be achieved after the radial sealing lip wears; however, in the prior art, for the skeleton oil seal, due to the smaller axial dimension of the inner ring 520, the inner ring 520 is greatly affected by the outer ring 510 and the skeleton 6, resulting in a smaller reaction force of the inner ring 520; therefore, after the sealing lip 522 wears, the sealing performance of the existing skeleton oil seal will rapidly decline, resulting in a shorter service life.

[0029] In view of this, the present application proposes a structure of a skeleton oil seal ring, including: a main body 1, the main body 1 includes an outer ring 110 and an inner ring 120, and is characterized in that the axial dimension of the inner ring 120 is greater than the axial dimension of the outer ring 110.

[0030] The first embodiment of the structure of a skeleton 2 oil seal ring in the present application:

[0031] In the present application, reference Figures 2 to 3 , is the first embodiment in the present application, including: a main body 1, the main body 1 is a circular ring structure made of rubber material. The main body 1 made of rubber material has a certain elasticity, can better fit on the surface of the parts, has good sealing performance, and has good wear resistance; the main body 1 includes an outer ring 110 and an inner ring 120, the inner ring 120 is located inside the outer ring 110, and the axial dimension of the inner ring 120 is greater than the axial dimension of the outer ring 110. As Figure 3 shown, that is, the lower end of the inner ring 120 extends out of the outer ring 110, which can reduce the influence of the supporting force of the outer ring 110 on one end of the inner ring 120 extending out of the outer ring 110. The outer ring 110 and the inner ring 120 are integrally formed structures, making the structure of the main body 1 more stable, and can be formed by injection molding at one time, reducing the processing cost.

[0032] Reference Figure 3 , inside the outer ring 110, there is a circular skeleton 2 arranged. The cross-section of the skeleton 2 is an L-shaped structure. The skeleton 2 is a structure made of metal material. The skeleton 2 is used to support the main body 1 and can play a role in strengthening the overall structure of the seal ring.

[0033] Reference Figure 3, a ring-shaped dust-proof lip 121 is provided on the inner side of the inner ring 120. The dust-proof lip 121 is located at one end of the inner ring 120 within the range of the outer ring 110. When the sealing ring is installed, the inner end of the dust-proof lip 121 will abut against the surface of the component, which can prevent external dust and impurities from entering the machine interior.

[0034] Reference Figure 3 , a ring-shaped first sealing lip 122 is provided at one end of the inner side of the inner ring 120 away from the dust-proof lip 121. When the sealing ring is installed, the first sealing lip 122 will abut against the surface of the component. The cross-section of the first sealing lip 122 is a rectangular structure, which can increase the contact area between the first sealing lip 122 and the surface of the component, so that the first sealing lip 122 can better prevent the lubricating oil inside the machine from flowing out.

[0035] Reference Figure 3 , a ring-shaped first spring 3 is provided on the outer side of the inner ring 120 corresponding to the first sealing lip 122. The first spring 3 is a circular spring, that is, the cross-section of the first spring 3 is a circular structure. The first spring 3 is embedded on the outer side of the inner ring 120. The first spring 3 can tighten the inner ring 120 inward. When the first sealing lip 122 is worn, under the action of the first spring 3, the first sealing lip 122 can be tightened inward, so that the worn first sealing lip 122 continues to closely adhere to the component in the middle.

[0036] The second embodiment of a skeleton 2 oil seal sealing ring structure of the present application:

[0037] Reference Figure 4 , compared with the first embodiment, the difference in this embodiment is that: two ring-shaped second sealing lips 123 are provided at one end of the inner side of the inner ring 120 away from the dust-proof lip 121. The cross-section of the second sealing lip 123 is circular. After the sealing ring is installed, both second sealing rings are in contact with the surface of the mechanical component, which can play a dual sealing role for the internal lubricating oil, improve the sealing performance of the sealing ring, and reduce the possibility of lubricating oil leakage caused by wear of the sealing lip.

[0038] Reference Figure 4 , a ring-shaped second spring 4 is provided on the outer side of the inner ring 120 corresponding to the second sealing lip 123. The second spring 4 is a square spring, that is, the cross-section of the second spring 4 is a square structure. Setting a square spring at the same position can increase the tightening area. The second spring 4 is embedded on the outer side of the inner ring 120. The second spring 4 can tighten the inner ring 120 inward, and the second spring 4 can simultaneously tighten the two second sealing lips 123 inward, so that the worn two second sealing lips 123 continue to closely adhere to the component in the middle.

[0039] The technical solution of this application increases the axial dimension of the inner ring, making the sealing lip and the spring away from the outer ring and the skeleton, reducing the influence of the supporting force of the outer ring and the skeleton on the sealing lip, enabling the sealing lip to closely adhere to the middle component under the action of the spring, thereby enhancing the sealing effect of the sealing ring. When the sealing lip is worn, due to the increased distance between the sealing lip and the outer ring and the skeleton, the spring can better drive the sealing lip to contract inward, always ensuring the sealing effect of the sealing ring, and thus extending the service life of the sealing ring.

[0040] The above are only alternative embodiments of this application, and do not limit the patent scope of this application. Any equivalent structural transformation made under the inventive concept of this application by using the content of the specification and drawings of this application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of this application.

Claims

1. A structure of a skeleton oil seal ring, comprising: The main body, the main body includes an outer ring and an inner ring, characterized in that the axial dimension of the inner ring is greater than the axial dimension of the outer ring, and a sealing lip is provided at one end of the inner ring extending out of the range of the outer ring, the sealing lip is an annular structure, and the cross-section of the sealing lip is a rectangular structure or a circular structure.

2. The structure of the skeleton oil seal ring according to claim 1, characterized in that, The main body is a circular ring structure made of rubber material.

3. The structure of the skeleton oil seal ring according to claim 1, characterized in that, The outer ring and the inner ring are integrally formed structures.

4. The structure of the skeleton oil seal ring according to claim 1, wherein, An annular dust-proof lip is provided on the inner side of the inner ring, and the dust-proof lip is located at one end of the inner ring within the range of the outer ring.

5. The structure of the skeleton oil seal ring according to claim 1, characterized in that, The sealing lip is a first sealing lip, the first sealing lip is provided at one end of the inner ring extending out of the range of the outer ring, and the cross-section of the first sealing lip is a rectangular structure.

6. The structure of the skeleton oil seal ring according to claim 5, characterized in that, A circular first spring is provided on the outer side of the inner ring corresponding to the first sealing lip, and the first spring is embedded on the outer side of the inner ring.

7. The structure of the skeleton oil seal ring according to claim 1, wherein The sealing lip is two second sealing lips, the two second sealing lips are located at one end of the inner ring extending out of the range of the outer ring, and the cross-section of the second sealing lip is a circular structure.

8. The structure of the skeleton oil seal ring according to claim 7, characterized in that, A square second spring is provided on the outer side of the inner ring corresponding to the two second sealing lips, and the second spring is embedded on the outer side of the inner ring.

9. The structure of the skeleton oil seal ring according to claim 1, characterized in that, An annular skeleton is provided inside the outer ring, the cross-section of the skeleton is an L-shaped structure, and the skeleton is used to support the main body.

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