Low friction long durable cartridge oil seal

Abstract

This utility model discloses a low-friction, long-durability box-type oil seal, relating to the field of box-type oil seal technology. It includes: a skeleton assembly comprising an outer skeleton and an inner skeleton located inside the outer skeleton, the outer and inner skeletons being concentrically distributed; and a sealing assembly comprising an outer sealing ring fixedly fitted onto the outside of the outer skeleton, the outer sealing ring having four protrusions extending from the side near the inner skeleton. These four protrusions, from left to right, form a first sealing groove, a second sealing groove, a third sealing groove, and a fourth sealing groove between themselves and the inner skeleton. All four sealing grooves are filled with oil. Compared to existing single-layer or double-layer mud-water resistant mechanisms, this utility model offers better mud-water resistant performance, preventing seal failure even after prolonged immersion in muddy or water-rich environments.

Description

Technical Field

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

[0002] A box-type oil seal is a combined sealing element used for rotating shaft sealing. Its core function is to prevent the leakage of lubricating oil inside the equipment, while blocking the intrusion of external mud, water and dust. Of the 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] Research indicates that most existing box-type oil seals only have a single or double-layer mud and water resistant structure. When applied to environments with abundant mud and water, they often fail to seal due to prolonged immersion time, and their actual sealing performance still needs improvement.

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

[0005] The purpose of this invention is to provide a low-friction, long-durability box-type oil seal that offers better mud and water protection compared to existing single- or double-layer mud and water protection mechanisms. Even after prolonged immersion in muddy or water-rich environments, it will not fail to seal. This addresses the problem mentioned in the background art that most existing box-type oil seals only have single- or double-layer mud and water protection structures, which often lead to seal failure due to prolonged immersion in muddy or water-rich environments, and the actual sealing performance still needs improvement.

[0006] According to one aspect of this disclosure, the following technical solution is provided: a low-friction, long-durability cartridge oil seal, 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, comprising an outer sealing ring fixedly fitted onto the outside of an outer frame, the outer sealing ring having four protrusions extending from the side near the inner frame, the four protrusions forming, from left to right, a first sealing groove, a second sealing groove, a third sealing groove, and a fourth sealing groove between the four protrusions and the inner frame, the first sealing groove, the second sealing groove, the third sealing groove, and the fourth sealing groove being filled with oil; and

[0009] A clamping assembly is used to locally clamp the skeleton assembly.

[0010] According to at least one embodiment of the low-friction, long-durability box-type oil seal of the present disclosure, a protective frame is fixed to the top of the outer side of the inner frame, and a bending portion is provided at the top of the inner frame, the bending portion cooperating with the inner frame to clamp and fix the protective frame.

[0011] According to at least one embodiment of the present disclosure, a low-friction, long-durability box-type oil seal has a plurality of outer annular protrusions uniformly arranged from top to bottom on the outer side of the outer sealing ring. The plurality of outer annular protrusions are integrally formed with the outer sealing ring and are all made of rubber.

[0012] According to at least one embodiment of the low-friction, long-durability cartridge oil seal of the present disclosure, the sealing assembly further includes an inner sealing ring fixedly nested inside the inner skeleton, the inner sealing ring being located inside the outer sealing ring and concentrically distributed with the outer sealing ring.

[0013] According to at least one embodiment of the present disclosure, a low-friction, long-durability box-type oil seal has a plurality of inner annular protrusions uniformly arranged from top to bottom on the inner side of the inner sealing ring. The plurality of inner annular protrusions are integrally formed with the inner sealing ring and are all made of rubber.

[0014] According to at least one embodiment of the present disclosure, a low-friction, long-durability cartridge oil seal includes a pressing assembly comprising an annular groove formed at the top of the inner side of an outer sealing ring, wherein an oil seal spring is sleeved and fixed inside the annular groove to press against the outer sealing ring through the inner wall of the annular groove.

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

[0016] This utility model incorporates a sealing component, which utilizes the cooperation between the outer sealing ring and the inner skeleton to form a first sealing groove, a second sealing groove, a third sealing groove, and a fourth sealing groove that can be filled with oil. This results in a four-layer structure with anti-mud and water function. Compared with existing single-layer or double-layer anti-mud and water mechanisms, it has a better anti-mud and water effect, and will not fail to seal even when immersed for a long time in a muddy and water-rich environment.

[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 and inner annular protrusions 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 shield the inner end of the outer sealing ring, preventing damage to the inner end of the outer sealing ring caused by the internal mechanism of the axle. At the same time, it allows for relatively convenient fixing of the protective frame, 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 low-friction, long-durability box-type oil seal according to one embodiment of the present disclosure.

[0021] Figure 2 This is a partial structural schematic diagram of a sealing assembly for a low-friction, long-durability cartridge oil seal according to one embodiment of the present disclosure.

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

[0023] 1. Skeleton assembly; 11. Outer skeleton; 12. Inner skeleton; 13. Protective skeleton;

[0024] 2. Sealing assembly; 21. Outer sealing ring; 22. First sealing groove; 23. Second sealing groove; 24. Third sealing groove; 25. Fourth sealing groove; 26. Outer annular protrusion; 27. Inner sealing ring; 28. Inner annular protrusion;

[0025] 3. Clamping assembly; 31. Annular pressure groove; 32. Oil seal spring. 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 low-friction, long-durability box-type oil seal according to one embodiment of the present disclosure.

[0028] Figure 2This is a partial structural schematic diagram of the sealing assembly 2 of a low-friction, long-durability box-type oil seal according to one embodiment of the present disclosure.

[0029] like Figures 1-2 As shown, the low-friction, long-durability cartridge oil seal disclosed herein may include components such as a skeleton assembly 1, a sealing assembly 2, and a clamping assembly 3.

[0030] like Figure 1 As shown in this disclosure, the skeleton assembly 1 includes an outer skeleton 11 and an inner skeleton 12 located inside the outer skeleton 11. The outer skeleton 11 and the inner skeleton 12 are arranged in concentric circles. A protective skeleton 13 is fixed to the top of the outer side of the inner skeleton 12. A bending part is provided at the top of the inner skeleton 12. The bending part cooperates with the inner skeleton 12 to clamp and fix the protective skeleton 13. The outer skeleton 11, the inner skeleton 12 and the protective skeleton 13 are all made of carbon steel.

[0031] Therefore, the protective frame 13 can be used to shield the inner end of the outer sealing ring 21, preventing damage to the inner end of the outer sealing ring 21 caused by the internal mechanism of the axle. At the same time, the protective frame 13 can be fixed relatively easily, thereby reducing production difficulty and production cost.

[0032] like Figure 1 and Figure 2 As 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. The outer sealing ring 21 has four protrusions extending from the side near the inner frame 12. The four protrusions and the inner frame 12 form a first sealing groove 22, a second sealing groove 23, a third sealing groove 24, and a fourth sealing groove 25 from left to right. The first sealing groove 22, the second sealing groove 23, the third sealing groove 24, and the fourth sealing groove 25 are all filled with oil, so that the cooperation between the outer sealing ring 21 and the inner frame 12 can form the first sealing groove 22, the second sealing groove 23, the third sealing groove 24, and the fourth sealing groove 25 that can be filled with oil, thereby forming a four-layer structure with anti-mud and water function. Compared with the existing single-layer or double-layer anti-mud and water mechanism, the anti-mud and water effect is better, and the sealing will not fail even if it is immersed for a long time in a muddy and water-rich environment.

[0033] like Figure 1As shown, the outer sealing ring 21 has multiple outer annular protrusions 26 evenly arranged from top to bottom on its outer side. The multiple outer annular protrusions 26 are integrally formed with the outer sealing ring 21 and are all made of rubber. The sealing assembly 2 also includes an inner sealing ring 27 fixedly nested inside the inner skeleton 12. The inner sealing ring 27 is located inside the outer sealing ring 21 and is concentrically distributed with the outer sealing ring 21. The inner side of the inner sealing ring 27 has multiple inner annular protrusions 28 evenly arranged from top to bottom on its inner side. The multiple inner annular protrusions 28 are integrally formed with the inner sealing ring 27 and are all made of rubber. This allows the multiple outer annular protrusions 26 and the multiple inner annular protrusions 28 to form a wave structure, thereby achieving an interference fit between the outer sealing ring 21 and the inner sealing ring 27 and the installation part, and preventing the leakage of lubricating oil during use.

[0034] like Figure 2 As shown in this disclosure, the pressing assembly 3 includes an annular pressing groove 31 opened on the top of the inner side of the outer sealing ring 21, and an oil seal spring 32 is sleeved and fixed inside the annular pressing groove 31 to press the outer sealing ring 21 through the inner wall of the annular pressing groove 31.

[0035] Therefore, the oil seal spring 32 inside the annular groove 31 can be used to press the inner end of the outer sealing ring 21, thereby making the inner end of the outer sealing ring 21 tightly fit against the outer surface of the inner skeleton 12 and ensuring the sealing effect.

[0036] 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.

[0037] 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 low-friction, long-durability box-type oil seal, characterized in that, 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, comprising an outer sealing ring fixedly fitted onto the outside of an outer frame, the outer sealing ring having four protrusions extending from the side near the inner frame, the four protrusions forming, from left to right, a first sealing groove, a second sealing groove, a third sealing groove, and a fourth sealing groove between the four protrusions and the inner frame, the first sealing groove, the second sealing groove, the third sealing groove, and the fourth sealing groove being filled with oil; and A clamping assembly is used to locally clamp the skeleton assembly.

2. The low-friction, long-durability cartridge oil seal according to claim 1, characterized in that: A protective frame is fixed to the top of the outer side of the inner frame, and a bending part is provided at the top of the inner frame. The bending part works with the inner frame to clamp and fix the protective frame.

3. The low-friction, long-durability cartridge oil seal according to claim 2, characterized in that: The outer sealing ring has multiple annular protrusions evenly arranged from top to bottom on its outer side. The multiple annular protrusions are integrally formed with the outer sealing ring and are all made of rubber.

4. The low-friction, long-durability cartridge oil seal according to claim 3, characterized in that: The sealing assembly also includes an inner sealing ring that is fixedly nested inside the inner frame. The inner sealing ring is located inside the outer sealing ring and is concentrically distributed with the outer sealing ring.

5. The low-friction, long-durability cartridge oil seal according to claim 4, characterized in that: The inner sealing ring has multiple inner annular protrusions evenly arranged from top to bottom on its inner side. The multiple inner annular protrusions are integrally formed with the inner sealing ring and are all made of rubber.

6. The low-friction, long-durability cartridge oil seal according to claim 5, characterized in that: The clamping assembly includes an annular groove formed on the top of the inner side of the outer sealing ring, and an oil seal spring that clamps the outer sealing ring through the inner wall of the annular groove is sleeved and fixed inside the annular groove.

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