PTFE lip low friction long life cartridge oil seal

Abstract

The utility model discloses a kind of PTFE lip low-friction long durable box type oil seal, it is related to box type oil seal technical field, comprising: framework assembly, the framework assembly includes outer framework and the inner framework located outer framework inboard, the outer framework and inner framework are concentrically distributed;Sealing assembly, the sealing assembly is used to carry out the sealing of rotating shaft;And double-lip protection assembly, the double-lip protection assembly is sequentially attached from top to bottom by PTFE upper lip, PTFE lower lip and rubber gasket, the inner end of the PTFE upper lip and PTFE lower lip is tightly attached to inner framework outboard, first protection groove is formed between the PTFE upper lip, PTFE lower lip and inner framework.The utility model compared with conventional only has the product with the structure of both sides of first sealing groove and second sealing groove, sealing effect is better, applicable to long time use in mud-rich environment.

Description

Technical Field

[0001] This utility model relates to the field of box-type oil seal technology, and in particular to a PTFE lip-type oil seal with low friction and long durability. Background Technology

[0002] Box-type oil seals are combined sealing elements used for rotating shaft sealing. Their main function is to prevent external mud, water, and dust from entering, while also preventing leakage of lubricating oil inside the equipment. Of these two functions, the mud and water prevention function is extremely important. If the mud and water prevention function fails and mud and water enter the oil seal, the lubricating oil sealing structure will also fail, leading to the failure of the overall function of the oil seal.

[0003] Most existing box-type oil seals only have a single or double layer of mud and water resistant structure. When immersed in an environment rich in mud and water for a long time, they often fail to seal. The actual sealing performance still needs to be improved.

[0004] Therefore, it is necessary to invent a PTFE lip-type low-friction, long-durability box seal to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a PTFE lip-type oil seal with low friction and long durability. Compared with conventional products that only have the structure on both sides of the first and second sealing grooves, it has a better sealing effect and is suitable for long-term use in muddy and watery environments. This solves the problem mentioned in the background art that most existing lip-type oil seals only have single or double-layer mud and water-proof structures, which often fail to seal when immersed in muddy and watery environments for a long time, and the actual sealing performance still needs to be improved.

[0006] According to one aspect of this disclosure, the following technical solution is provided: a PTFE lip-type oil seal with low friction and long durability, comprising:

[0007] A skeleton assembly, comprising an outer skeleton and an inner skeleton located inside the outer skeleton, wherein the outer skeleton and the inner skeleton are arranged in concentric circles;

[0008] A sealing assembly for sealing a rotating shaft; and

[0009] A double-lip protection assembly, comprising a PTFE upper lip, a PTFE lower lip, and a rubber gasket sequentially bonded from top to bottom. The inner ends of the PTFE upper lip and the PTFE lower lip are tightly bonded to the outer side of the inner skeleton. A first protective groove is formed between the PTFE upper lip, the PTFE lower lip, and the inner skeleton. A second protective groove is formed between the PTFE lower lip, the outer skeleton, and the inner skeleton. Both the first and second protective grooves are filled with oil.

[0010] According to at least one embodiment of the PTFE lip low-friction long-durability box-type oil seal of the present disclosure, the skeleton assembly further includes a pressing skeleton, the outer skeleton and the pressing skeleton are concentrically distributed, the rubber gasket is tightly fitted to the top of the outer skeleton, and the pressing skeleton is pressed against the top of the PTFE upper lip.

[0011] According to at least one embodiment of the PTFE lip low-friction long-durability box-type oil seal of the present disclosure, the skeleton assembly further includes a protective skeleton, the top of the inner skeleton is provided with a bending portion, the bending portion cooperates with the inner skeleton to clamp and fix the protective skeleton.

[0012] According to at least one embodiment of the present disclosure, a PTFE lip low-friction long-durability box-type oil seal includes an outer sealing ring fixedly fitted to the outside of an outer skeleton, and a plurality of integrally formed outer annular protrusions are evenly arranged from top to bottom on the outer side of the outer sealing ring.

[0013] According to at least one embodiment of the PTFE lip low-friction long-durability box-type oil seal of the present disclosure, the sealing assembly further includes an inner sealing ring fixedly nested inside the inner skeleton, and the inner side of the inner sealing ring is provided with a plurality of integrally formed inner annular protrusions from top to bottom.

[0014] According to at least one embodiment of the present disclosure, a PTFE lip low-friction long-durability box-type oil seal is provided, wherein both the outer sealing ring and the inner sealing ring are made of rubber, and a first sealing groove and a second sealing groove are formed sequentially from the inside to the outside between the inner sealing ring and the outer skeleton, and both the first sealing groove and the second sealing groove are filled with oil.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] This invention features a double-lip protection assembly, which utilizes a PTFE upper lip, a PTFE lower lip, and a rubber gasket in conjunction with an outer skeleton and an inner skeleton to form a first and second protective groove for oil filling. This further creates two layers of mud- and water-resistant structures inside the first and second sealing grooves. Compared to conventional products that only have structures on both sides of the first and second sealing grooves, this design provides a better sealing effect and is suitable for long-term use in muddy and water-rich environments.

[0017] This invention provides multiple outer annular protrusions on the outer side of the outer sealing ring and an inner annular protrusion on the inner side of the inner sealing ring. This allows the multiple outer annular protrusions and the multiple outer sealing rings to form a wave structure, thereby achieving an interference fit between the outer and inner sealing rings and the installation location, and preventing lubricant leakage during use.

[0018] This utility model provides a protective frame on the outside of the inner frame, and uses the inner frame and the bending part to fix the protective frame. This allows the protective frame to cover the inner end of the PTFE upper lip, preventing damage to the inner end of the PTFE upper lip from the internal mechanism of the axle. At the same time, the protective frame can be fixed relatively easily, thereby reducing production difficulty and production cost. Attached Figure Description

[0019] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0020] Figure 1 This is a schematic diagram of the overall structure of a PTFE lip low-friction long-durability box-type oil seal according to one embodiment of the present disclosure.

[0021] Figure 2 This is a schematic diagram of a double-lip protection assembly for a PTFE lip low-friction, long-durability box-type oil seal according to one embodiment of the present disclosure.

[0022] The specific labels in the attached figures are as follows:

[0023] 1. Frame assembly; 11. Outer frame; 12. Compression frame; 13. Inner frame; 14. Protective frame;

[0024] 2. Sealing assembly; 21. Outer sealing ring; 22. Inner sealing ring; 23. First sealing groove; 24. Second sealing groove; 25. Outer annular protrusion; 26. Inner annular protrusion;

[0025] 3. Double-lip protective assembly; 31. PTFE upper lip; 32. PTFE lower lip; 33. Rubber gasket; 34. First protective groove; 35. Second protective groove. Detailed Implementation

[0026] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” other components or features would subsequently be positioned “above” said other components or features. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0027] Figure 1 This is a schematic diagram of the overall structure of a PTFE lip low-friction long-durability box-type oil seal according to one embodiment of the present disclosure.

[0028] Figure 2 This is a schematic diagram of the structure of a double-lip protection assembly 3 for a PTFE lip low-friction, long-durability box-type oil seal according to one embodiment of the present disclosure.

[0029] like Figures 1-2 As shown, the PTFE lip low-friction long-durability box-type oil seal disclosed herein may include components such as: skeleton assembly 1, sealing assembly 2, and double lip protection assembly 3.

[0030] like Figure 1 As shown in this disclosure, the skeleton assembly 1 includes an outer skeleton 11 and an inner skeleton 13 located inside the outer skeleton 11. The outer skeleton 11 and the inner skeleton 13 are arranged in concentric circles. The skeleton assembly 1 also includes a clamping skeleton 12. The outer skeleton 11 and the clamping skeleton 12 are arranged in concentric circles. The rubber gasket 33 is tightly attached to the top of the outer skeleton 11. The clamping skeleton 12 is pressed against the top of the PTFE upper lip 31. The skeleton assembly 1 also includes a protective skeleton 14. The top of the inner skeleton 13 is provided with a bending part. The bending part cooperates with the inner skeleton 13 to clamp and fix the protective skeleton 14. The outer skeleton 11, the clamping skeleton 12, the inner skeleton 13 and the protective skeleton 14 are all made of carbon steel.

[0031] Therefore, the protective frame 14 can be used to shield the inner end of the PTFE upper lip 31, preventing damage to the inner end of the PTFE upper lip 31 by the internal mechanism of the axle. At the same time, the protective frame 14 can be fixed relatively easily, thereby reducing production difficulty and production cost.

[0032] like Figure 1As shown, in a preferred embodiment, the sealing assembly 2 includes an outer sealing ring 21 fixedly sleeved on the outside of the outer frame 11. Multiple integrally formed outer annular protrusions 25 are evenly arranged from top to bottom on the outer side of the outer sealing ring 21. The sealing assembly 2 also includes an inner sealing ring 22 fixedly nested inside the inner frame 13. Multiple integrally formed inner annular protrusions 26 are arranged from top to bottom on the inner side of the inner sealing ring 22, so as to form a wave structure using the multiple outer annular protrusions 25 and the multiple outer sealing rings 21, thereby achieving an interference fit between the outer sealing ring 21 and the inner sealing ring 22 and the installation location, preventing lubricant leakage during use. Both the outer sealing ring 21 and the inner sealing ring 22 are made of rubber. A first sealing groove 23 and a second sealing groove 24 are formed sequentially from the inside to the outside between the inner sealing ring 22 and the outer frame 11. Both the first sealing groove 23 and the second sealing groove 24 are filled with oil, so as to form a two-layer structure with anti-mud and water function using the first sealing groove 23 and the second sealing groove 24.

[0033] like Figure 2 As shown in this disclosure, the double-lip protective assembly 3 consists of a PTFE upper lip 31, a PTFE lower lip 32, and a rubber gasket 33, which are sequentially attached from top to bottom. The inner ends of the PTFE upper lip 31 and the PTFE lower lip 32 are tightly attached to the outer side of the inner skeleton 13. A first protective groove 34 is formed between the PTFE upper lip 31, the PTFE lower lip 32, and the inner skeleton 13. A second protective groove 35 is formed between the PTFE lower lip 32, the outer skeleton 11, and the inner skeleton 13. Both the first protective groove 34 and the second protective groove 35 are filled with oil. In addition, compared with conventional rubber lips, the PTFE upper lip 31 and the PTFE lower lip 32 have better high and low temperature resistance, are compatible with most lubricants, and have lower torque and friction coefficient while also having better wear resistance.

[0034] Therefore, by using the PTFE upper lip 31, PTFE lower lip 32 and rubber gasket 33 in conjunction with the outer skeleton 11 and inner skeleton 13 to form the first protective groove 34 and the second protective groove 35 for oil filling, two layers of structure with anti-mud and water function are formed again inside the first sealing groove 23 and the second sealing groove 24. Compared with conventional products that only have structures on both sides of the first sealing groove 23 and the second sealing groove 24, the sealing effect is better and it is suitable for long-term use in muddy and water-rich environments.

[0035] It should also be noted that any content not described in detail in this specification is prior art known to those skilled in the art.

[0036] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A PTFE lip low friction long durable cartridge oil seal characterized by, include: A skeleton assembly, comprising an outer skeleton and an inner skeleton located inside the outer skeleton, wherein the outer skeleton and the inner skeleton are arranged in concentric circles; A sealing assembly for sealing a rotating shaft; and A double-lip protection assembly, comprising a PTFE upper lip, a PTFE lower lip, and a rubber gasket sequentially bonded from top to bottom. The inner ends of the PTFE upper lip and the PTFE lower lip are tightly bonded to the outer side of the inner skeleton. A first protective groove is formed between the PTFE upper lip, the PTFE lower lip, and the inner skeleton. A second protective groove is formed between the PTFE lower lip, the outer skeleton, and the inner skeleton. Both the first and second protective grooves are filled with oil.

2. The PTFE lip low friction long durable cartridge oil seal of claim 1, wherein: The skeleton assembly also includes a compression skeleton, the outer skeleton and the compression skeleton are concentrically distributed, the rubber gasket is tightly fitted to the top of the outer skeleton, and the compression skeleton is pressed against the top of the PTFE upper lip.

3. The PTFE lip low friction long durable cartridge oil seal of claim 2, wherein: The frame assembly also includes a protective frame, and the top of the inner frame is provided with a bending part, which works with the inner frame to clamp and fix the protective frame.

4. The PTFE lip low friction long durable cartridge oil seal of claim 3, wherein: The sealing assembly includes an outer sealing ring that is fixedly sleeved on the outside of the outer frame, and multiple integrally formed outer annular protrusions are evenly arranged on the outside of the outer sealing ring from top to bottom.

5. The PTFE lip low friction long durable cartridge oil seal of claim 4, wherein: The sealing assembly also includes an inner sealing ring that is fixedly nested inside the inner skeleton, and the inner sealing ring has multiple integrally formed inner annular protrusions arranged from top to bottom on its inner side.

6. The PTFE lip low friction long durable cartridge oil seal of claim 5, wherein: Both the outer and inner sealing rings are made of rubber. The inner sealing ring and the outer frame form a first sealing groove and a second sealing groove from the inside out. Both the first and second sealing grooves are filled with oil.

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