Full-rubber-coated framework oil seal

Abstract

The utility model relates to a fully-encapsulated framework oil seal which comprises a fully-encapsulated framework with an inner cavity as the periphery, a first inner hole is formed in the bottom face of the fully-encapsulated framework, a dustproof rubber pad is placed at the bottom of the cavity of the fully-encapsulated framework, a second inner hole is formed in the middle of the dustproof rubber pad, and the second inner hole is communicated with the first inner hole. A dustproof rubber pad is arranged on the upper surface of the full-wrapping framework, a sealing support is arranged on the dustproof rubber pad, the sealing support is integrally formed by a supporting base, a supporting waist part and a sealing lip part, a supporting frame is arranged on the sealing support, the supporting frame is tightly pressed by an eave type folding edge of the full-wrapping framework, the sealing support is made of PTFE materials, and the full-wrapping framework is made of aluminum. Due to the fact that the sealing support is made of PTFE (polytetrafluoroethylene) materials, the sealing support has the advantages of being resistant to high temperature and corrosion, low in friction coefficient and high in abrasion resistance, and the fully-wrapped framework is made of aluminum, so that the strength of the whole framework oil seal is improved, and using requirements in different working environments can be met.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a fully encapsulated rubber skeleton oil seal. Background Technology

[0002] A skeleton oil seal is a sealing component for the rotating shaft of a mechanism. Its function is to prevent liquid from leaking outward along the rotating shaft and to prevent external debris from entering the machine body. Skeleton oil seals are simple in structure, easy to install, inexpensive, and widely used.

[0003] Traditional skeleton oil seals are generally composed of rubber or other polymer materials and a metal skeleton. In the free state, the inner diameter of the skeleton oil seal is smaller than the shaft diameter, which means it has a certain "interference fit". When paired with shaft parts, it generates a certain radial tightening force on the shaft. In addition, the spring can compensate for the self-tightening force of the oil seal at any time, which can basically meet the basic requirements under normal working conditions.

[0004] In some high-temperature and high-pressure working environments, or in some harsh sealing working environments with corrosive chemical oils, such as hydraulic systems, fuel systems and other critical components in aerospace and shipbuilding industries, the rubber material of this traditional skeleton oil seal is not resistant to high temperature and high pressure, nor is it resistant to corrosion, and its service life will be greatly reduced. Therefore, it needs to be improved to meet the usage requirements in different working environments. Summary of the Invention

[0005] The purpose of this invention is to provide a fully encapsulated rubber skeleton oil seal to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical measures: a fully enclosed skeleton oil seal, characterized in that: it includes a fully enclosed skeleton with an inner cavity as the outer periphery, a first inner hole is provided on the bottom surface of the fully enclosed skeleton, a dustproof rubber pad is placed at the bottom of the cavity of the fully enclosed skeleton, a second inner hole is provided in the middle of the dustproof rubber pad, a sealing bracket is placed on the dustproof rubber pad, the sealing bracket is integrally composed of a support base, a support waist and a sealing lip, a support frame is placed on the sealing bracket, the support frame is pressed by the eaves-type folded edge of the fully enclosed skeleton, the material of the sealing bracket is PTFE material, and the material of the fully enclosed skeleton is aluminum.

[0007] Compared with existing technologies, the advantages of this invention are as follows: The sealing bracket is made of PTFE (polytetrafluoroethylene), which is resistant to high temperatures and corrosion, and has a low coefficient of friction and strong wear resistance. The fully enclosed skeleton is made of aluminum, increasing the overall strength of the oil seal. This novel fully enclosed rubber-coated skeleton oil seal can meet the requirements of different working environments.

[0008] As an improvement to this utility model, the diameter of the second inner hole is C, and the diameter of the first inner hole is D, wherein C is greater than D. The purpose of this design is to allow the second inner hole of the dustproof rubber pad to wrap around the shaft body, thus providing dust protection, while preventing the first inner hole of the full-coverage frame from directly wrapping around the shaft body, since the material of the full-coverage frame is aluminum.

[0009] As an improvement to this utility model, the outer diameter of the support base is B, and the inner diameter of the cavity of the fully enclosed skeleton is A, wherein B is greater than A. The purpose of this design is to ensure an interference fit between the sealing bracket and the fully enclosed skeleton, preventing the sealing bracket from moving slightly to the left or right and affecting the sealing performance.

[0010] As an improvement to this invention, the wall thickness of the lumbar support is E, and its thickness decreases from bottom to top. The purpose of this design is to enhance the support capacity of the lumbar support.

[0011] As an improvement to this utility model, the wall thickness of the sealing lip is F, where F is less than E. The purpose of this design is to achieve an aesthetically pleasing overall appearance.

[0012] As an improvement to this utility model, the support frame is made of aluminum. The purpose of choosing this design is that aluminum has a certain strength, which can compress the dustproof rubber and improve the rigidity of the entire skeleton oil seal. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0014] In the attached diagram:

[0015] Figure 1 This is an exploded view of the fully encapsulated rubber skeleton oil seal described in this utility model.

[0016] Figure 2 This is a cross-sectional view of the fully encapsulated rubber skeleton oil seal described in this utility model.

[0017] Figure 3 This is a perspective view of the sealing bracket described in this utility model.

[0018] Figure 4 This is a cross-sectional view of the sealing bracket described in this utility model.

[0019] Figure 5 This is a perspective view of another embodiment of the sealing bracket described in this utility model.

[0020] Figure 6This is a perspective view of the fully enclosed skeleton described in this utility model.

[0021] Figure 7 This is a perspective view of the dustproof rubber pad described in this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Full-coverage frame; 2. First inner hole; 3. Dustproof rubber pad; 4. Second inner hole; 5. Sealing bracket; 6. Support base; 7. Support waist; 8. Sealing lip; 9. Support frame; 10. Eaves-style folded edge. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] Example 1

[0025] Please refer to Figure 1 -7.

[0026] This embodiment provides a fully encapsulated skeleton oil seal, comprising a fully encapsulated skeleton 1 with an inner cavity as the outer periphery. A first inner hole 2 is provided on the bottom surface of the fully encapsulated skeleton 1. A dustproof rubber pad 3 is placed at the bottom of the cavity of the fully encapsulated skeleton 1. A second inner hole 4 is provided in the middle of the dustproof rubber pad 3. A sealing bracket 5 is placed on top of the dustproof rubber pad 3. The sealing bracket 5 is integrally composed of a support base 6, a support waist 7, and a sealing lip 8. A support frame 9 is placed on top of the sealing bracket 5. The support frame 9 is pressed by the eaves-type folded edge of the fully encapsulated skeleton 1. The sealing bracket 5 is made of PTFE material, and the fully encapsulated skeleton 1 is made of aluminum.

[0027] In the embodiments of this utility model application, please refer to Figure 6 and Figure 7 The diameter of the second inner hole 4 is C, and the diameter of the first inner hole 2 is D, where C is greater than D. The second inner hole 4 of the dustproof rubber pad 3 is designed to enclose the shaft body to provide dust protection. The first inner hole 2 of the full-coverage frame 1 should not directly enclose the shaft body, as the material of the full-coverage frame 1 is aluminum, which is less flexible than rubber, resulting in inferior sealing performance.

[0028] In the embodiments of this utility model application, please refer to Figure 3 and Figure 6 The outer diameter of the support base 6 is B, and the inner diameter of the cavity of the full-enclosure frame 1 is A, where B is greater than A. The sealing bracket 5 and the full-enclosure frame 1 are designed to form an interference fit, preventing the sealing bracket 5 from moving slightly left or right and thus maintaining sealing performance.

[0029] In the embodiments of this utility model application, please refer to Figure 4 The wall thickness of the supporting waist 7 is E, and its thickness decreases from bottom to top. This structure makes the supporting force of the supporting waist 7 stronger towards the bottom.

[0030] Furthermore, the wall thickness of the sealing lip 8 is F, where F is less than E, making the overall shape aesthetically pleasing.

[0031] Furthermore, the support frame 9 is made of aluminum. Because aluminum has a certain strength, it can compress the dustproof rubber and improve the rigidity of the entire oil seal skeleton.

[0032] In the embodiments of this utility model application, please refer to Figure 5 As another embodiment of the sealing bracket 5, its supporting waist 7 and sealing lip 8 can be designed as a continuous integral part, with no visible dividing line between them. This can reduce manufacturing processes and lower production costs.

[0033] This embodiment provides a fully encapsulated skeleton oil seal, which is connected as follows: the sealing bracket 5 and the fully encapsulated skeleton 1 are interference fit, the support frame 9 is placed on the dustproof rubber pad 3, and then the upper edge of the fully encapsulated skeleton 1 is bent to form an eave-like folded edge 10, which tightly presses against the support frame 9, so that the entire skeleton oil seal forms a rigid whole.

[0034] The beneficial effects of this utility model are as follows: Because the sealing bracket 5 is made of PTFE (polytetrafluoroethylene), which has high temperature resistance and corrosion resistance, and also has a low coefficient of friction and strong wear resistance, and the entire skeleton 1 is made of aluminum, the strength of the entire skeleton oil seal is increased. This novel structure can meet the usage requirements under different working environments.

[0035] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A full bootback oil seal characterized by: The application relates to a full-enclosing frame (1) with an in-band cavity as a periphery, wherein a first inner hole (2) is arranged on the bottom surface of the full-enclosing frame (1), a dustproof rubber pad (3) is arranged on the cavity bottom of the full-enclosing frame (1), a second inner hole (4) is arranged in the middle of the dustproof rubber pad (3), a sealing support (5) is arranged on the upper surface of the dustproof rubber pad (3), the sealing support (5) is composed of a supporting base (6), a supporting waist (7) and a sealing lip (8), a supporting frame (9) is arranged on the upper surface of the sealing support (5), the supporting frame (9) is compressed by a eave-shaped folded edge (10) of the full-enclosing frame (1), the material of the sealing support (5) is PTFE material, and the material of the full-enclosing frame (1) is aluminum.

2. The full bootback oil seal of claim 1 wherein: The aperture size of the second inner hole (4) is C, and the aperture size of the first inner hole (2) is D, wherein C is greater than D.

3. The full boot oil seal of claim 1 wherein: The outer diameter size of the supporting base (6) is B, and the inner diameter size of the cavity of the full-enclosing frame (1) is A, wherein B is greater than A.

4. The full boot oil seal of claim 1 wherein: The wall thickness of the supporting waist (7) is E, and the thickness decreases from bottom to top.

5. The full-bore skeleton oil seal of claim 1 wherein: The wall thickness of the sealing lip (8) is F, wherein F is less than E.

6. The full boot oil seal of claim 1 wherein: The material of the supporting frame (9) is metal aluminum.

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