Novel framework oil seal for mechanical rotating structure

Abstract

A novel framework oil seal for a mechanical rotating structure comprises a transition ring and an oil seal body, the transition ring comprises a transition ring framework made of high-abrasion-resistance materials and a transition ring rubber layer attached to the outer surface of the transition ring framework, and the oil seal body is formed by a main body and an auxiliary body in an interference fit mode. The main body comprises a main framework and a main framework rubber layer attached to the outer portion of the main framework, the auxiliary body comprises an auxiliary framework and an auxiliary framework rubber layer attached to the outer portion of the auxiliary framework, the main framework rubber layer is provided with a first lip edge attached to the surface of the transition ring framework, and the auxiliary framework rubber layer is provided with a second lip edge attached to the surface of the transition ring framework. A lubricating oil chamber is formed while the first lip edge and the second lip edge are tightly attached to the surface of the transition ring framework; the high-abrasion-resistance transition ring framework is arranged on the main shaft and moves synchronously with the main shaft, contact sealing is achieved between the transition ring framework and the first lip edge and between the transition ring framework and the second lip edge, the service life of the framework oil seal is greatly prolonged, and the original toughness of the main shaft is kept.

Description

Technical Field

[0001] This utility model relates to a novel skeleton oil seal for use in mechanical rotating structures. Background Technology

[0002] In mechanical rotating structures, skeleton oil seals are often used to achieve waterproofing and dustproofing, thereby ensuring the long-term sealing performance of the rotating parts. For example, a skeleton oil seal is used between the motor shaft and the wheel hub in electric vehicles. In existing mechanical rotating structures, the sealing lip of the skeleton oil seal is generally in direct contact with the outer surface of the main shaft. During relative rotation, the rubber on the outer surface of the skeleton oil seal is not easily worn. However, with the increase of operating time, the outer surface of the main shaft often experiences a certain degree of wear, forming gaps, which in turn leads to seal failure. To improve the wear resistance of the main shaft, high-hardness materials or process optimization methods are required. However, while increasing the hardness of the main shaft, its toughness will decrease, making it more prone to local cracking, main shaft breakage, and other failures.

[0003] In addition, traditional skeleton oil seals have an open structure and cannot form an independent and sealed oil reservoir. Therefore, only a small amount of grease can be applied to the lip that contacts the shaft for lubrication and sealing. However, grease lubrication and sealing not only result in high sliding resistance, but the grease also dries or solidifies quickly, leading to a decrease in sealing performance or even failure. Summary of the Invention

[0004] To address the shortcomings mentioned above, this utility model provides a novel skeleton oil seal for use in mechanical rotating structures.

[0005] To achieve the above objectives, this utility model provides a novel skeleton oil seal for use in mechanical rotating structures, comprising a transition ring and an oil seal body. The transition ring includes a transition ring skeleton made of a high wear-resistant material and a transition ring rubber layer attached to the outer surface of the transition ring skeleton. The transition ring can be mounted on a spindle via the attached transition ring rubber layer and moves synchronously with the spindle. The oil seal body moves relative to the spindle. The oil seal body is formed by interference fit of a main body and a sub-body. The main body includes a main skeleton and a main skeleton rubber layer attached to the outside of the main skeleton. The sub-body includes a sub-skeleton and a sub-skeleton rubber layer attached to the outside of the sub-skeleton. The main skeleton rubber layer has a first lip that is in close contact with the surface of the transition ring skeleton, and the sub-skeleton rubber layer has a second lip that is in close contact with the surface of the transition ring skeleton. The first lip and the second lip, while in close contact with the surface of the transition ring skeleton, form a lubricating oil chamber.

[0006] Furthermore, the transition ring skeleton is in the shape of a flat pad, and the flat pad is formed with a flange by a flanging process. The transition ring rubber layer is attached to the flange, and the first lip, the second lip and the two sides of the flat pad are in contact and sealed.

[0007] Furthermore, a third lip is formed on the main skeleton rubber layer, which is close to the outer circumferential surface of the main shaft but does not contact the main shaft.

[0008] Furthermore, the transition ring skeleton is cylindrical, the transition ring rubber layer is attached to the inner wall of the cylindrical transition ring skeleton, the outer wall of the cylindrical transition ring skeleton is in contact with the first lip and the second lip, and the cylindrical length of the transition ring skeleton is greater than the distance between the first lip and the second lip.

[0009] Furthermore, a third lip is formed on the main skeleton rubber layer, the third lip is in contact with and sealed to the outer wall of the flange, and a lubricating oil chamber I is formed between the first lip, the third lip and the transition ring skeleton.

[0010] The advantages of this utility model over the prior art are as follows:

[0011] By configuring a highly wear-resistant transition ring skeleton on the spindle and moving synchronously with it, and achieving contact sealing between the transition ring skeleton and the first and second lips, the lifespan of this skeleton oil seal is significantly extended, while the spindle maintains its original toughness. The new skeleton oil seal, due to the use of a transition ring and the formation of an independent and sealed lubricating oil chamber inside, can inject highly fluid lubricating oil, which not only significantly reduces sliding friction and energy consumption but also greatly extends its service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a novel skeleton oil seal for use in mechanical rotating structures (Example 1).

[0013] Figure 2 This is a schematic diagram of a novel skeleton oil seal for use in mechanical rotating structures (Example 2).

[0014] Figure 3 This is a schematic diagram of a novel skeleton oil seal for use in mechanical rotating structures (Example 3).

[0015] In the figure: 1. Main shaft; 2. Transition ring; 21. Transition ring skeleton; 211. Flange; 22. Transition ring rubber layer; 3. Oil seal body; 31. Main body; 311. Main skeleton; 312. Main skeleton rubber layer; 3121. First lip; 3122. Third lip; 32. Sub-body; 321. Sub-skeleton; 322. Sub-skeleton rubber layer; 3221. Second lip; 4. Lubricating oil chamber; 5. Lubricating oil chamber I. Detailed Implementation

[0016] Example 1: As Figure 1 As shown in the figure, a novel skeleton oil seal for a mechanical rotating structure according to an embodiment of the present invention includes a transition ring 2 and an oil seal body 3. The transition ring 2 includes a transition ring skeleton 21 made of a high wear-resistant material and a transition ring rubber layer 22 attached to the outer surface of the transition ring skeleton 21. The transition ring 2 can be mounted on a main shaft 1 through the attached transition ring rubber layer 22 and moves synchronously with the main shaft 1. The oil seal body 3 moves relative to the main shaft 1. The oil seal body 3 is formed by an interference fit of a main body 31 and a secondary body 32. The main body 31 includes a main skeleton 311 and a main skeleton rubber layer 312 attached to the outside of the main skeleton 311. The secondary body 32 includes a secondary skeleton 321 and a secondary skeleton rubber layer 322 attached to the outside of the secondary skeleton 321. The main skeleton rubber layer 312 has a... The transition ring skeleton 21 has a first lip 3121 that is tightly attached to the surface, and the secondary skeleton rubber layer 322 has a second lip 3221 that is tightly attached to the surface of the transition ring skeleton 21. The first lip 3121 and the second lip 3221 are tightly attached to the surface of the transition ring skeleton 21 to form a lubricating oil chamber 4. The transition ring skeleton 21 is in the shape of a flat pad, and the flat pad has a flange 211 formed by a hole-making process. The transition ring rubber layer 22 is attached to the flange 211, and the first lip 3121 and the second lip 3221 are in contact with the two sides of the flat pad to achieve a seal. The main skeleton rubber layer 312 also has a third lip 3122 formed on it. The third lip 3122 is close to the outer circumferential surface of the main shaft 1 but does not contact the main shaft 1. The third lip 3122 serves to block water and dust.

[0017] Example 2: As Figure 2As shown in the figure, a novel skeleton oil seal for a mechanical rotating structure according to an embodiment of the present invention includes a transition ring 2 and an oil seal body 3. The transition ring 2 includes a transition ring skeleton 21 made of a high wear-resistant material and a transition ring rubber layer 22 attached to the outer surface of the transition ring skeleton 21. The transition ring 2 can be mounted on a main shaft 1 through the attached transition ring rubber layer 22 and moves synchronously with the main shaft 1. The oil seal body 3 moves relative to the main shaft 1. The oil seal body 3 is formed by an interference fit of a main body 31 and a secondary body 32. The main body 31 includes a main skeleton 311 and a main skeleton rubber layer 312 attached to the outside of the main skeleton 311. The secondary body 32 includes a secondary skeleton 321 and a secondary skeleton rubber layer 322 attached to the outside of the secondary skeleton 321. The main skeleton rubber layer 312 has... The transition ring skeleton 21 has a first lip 3121 that is in close contact with the surface of the transition ring skeleton 21, and a second lip 3221 that is in close contact with the surface of the transition ring skeleton 21 on the secondary skeleton rubber layer 322. The first lip 3121 and the second lip 3221 form a lubricating oil chamber 4 while being in close contact with the surface of the transition ring skeleton 21. The transition ring skeleton 21 is cylindrical, and the transition ring rubber layer 22 is attached to the inner wall of the cylindrical transition ring skeleton 21. The outer wall of the cylindrical transition ring skeleton 21 is in contact with the first lip 3121 and the second lip 3221 to achieve a seal. The cylindrical length of the transition ring skeleton 21 is greater than the distance between the first lip 3121 and the second lip 3221. In this way, when the mechanical rotating structure undergoes a certain range of axial movement, the new skeleton oil seal can still maintain a seal.

[0018] Example 3: As Figure 3As shown in the figure, a novel skeleton oil seal for a mechanical rotating structure according to an embodiment of the present invention includes a transition ring 2 and an oil seal body 3. The transition ring 2 includes a transition ring skeleton 21 made of a high wear-resistant material and a transition ring rubber layer 22 attached to the outer surface of the transition ring skeleton 21. The transition ring 2 can be mounted on a spindle 1 through the attached transition ring rubber layer 22 and moves synchronously with the spindle 1. The oil seal body 3 moves relative to the spindle 1. The oil seal body 3 is formed by an interference fit of a main body 31 and a secondary body 32. The main body 31 includes a main skeleton 311 and a main skeleton rubber layer 312 attached to the outside of the main skeleton 311. The secondary body 32 includes a secondary skeleton 321 and a secondary skeleton rubber layer 322 attached to the outside of the secondary skeleton 321. The main skeleton rubber layer 312 has a first lip 3 that is in close contact with the surface of the transition ring skeleton 21. 121, the secondary skeleton rubber layer 322 has a second lip 3221 that is in close contact with the surface of the transition ring skeleton 21. The first lip 3121 and the second lip 3221 are in close contact with the surface of the transition ring skeleton 21 to form a lubricating oil chamber 4. The transition ring skeleton 21 is in the shape of a flat pad. The flat pad is formed with a flange 211 by a flanging process. The transition ring rubber layer 22 is attached to the flange 211. The first lip 3121 and the second lip 3221 are in contact with the two sides of the flat pad to achieve a seal. The main skeleton rubber layer 312 also has a third lip 3122. The third lip 3122 is in contact with the outer wall of the flange 211 to achieve a seal. A lubricating oil chamber I5 is formed between the first lip 3121, the third lip 3122 and the transition ring skeleton 21. The setting of the lubricating oil chamber I5 makes the sealing performance of the new skeleton oil seal better.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 novel skeleton oil seal for mechanical rotating structures, characterized by: The system includes a transition ring (2) and an oil seal body (3). The transition ring (2) includes a transition ring skeleton (21) made of a high wear-resistant material and a transition ring rubber layer (22) attached to the outer surface of the transition ring skeleton (21). The transition ring (2) can be mounted on the main shaft (1) through the attached transition ring rubber layer (22) and moves synchronously with the main shaft (1). The oil seal body (3) moves relative to the main shaft (1). The oil seal body (3) is formed by interference fit of a main body (31) and a secondary body (32). The main body (31) includes a main skeleton (311) and a secondary body (32) attached to the main skeleton (311). 311) External main skeleton rubber layer (312), the sub-body (32) includes a sub-skeleton (321) and a sub-skeleton rubber layer (322) attached to the outside of the sub-skeleton (321). The main skeleton rubber layer (312) has a first lip (3121) that is in close contact with the surface of the transition ring skeleton (21). The sub-skeleton rubber layer (322) has a second lip (3221) that is in close contact with the surface of the transition ring skeleton (21). The first lip (3121) and the second lip (3221) are in close contact with the surface of the transition ring skeleton (21) to form a lubricating oil chamber (4).

2. A novel skeleton oil seal for mechanical rotating structures as claimed in claim 1, wherein: The transition ring skeleton (21) is in the shape of a flat pad. The flat pad is formed with a flange (211) by a hole-making process. The transition ring rubber layer (22) is attached to the flange (211). The first lip (3121), the second lip (3221) and the two sides of the flat pad are in contact and sealed.

3. A novel skeleton oil seal for mechanical rotating structures as claimed in claim 2, wherein: A third lip (3122) is also formed on the main skeleton rubber layer (312), which is close to the outer circumferential surface of the main shaft (1) but does not contact the main shaft (1).

4. A novel skeleton oil seal for mechanical rotating structures as claimed in claim 1, wherein: The transition ring skeleton (21) is cylindrical, and the transition ring rubber layer (22) is attached to the inner wall of the cylindrical transition ring skeleton (21). The outer wall of the cylindrical transition ring skeleton (21) is in contact with the first lip (3121) and the second lip (3221) to achieve a seal. The cylindrical length of the transition ring skeleton (21) is greater than the distance between the first lip (3121) and the second lip (3221).

5. A novel skeleton oil seal for mechanical rotating structures as claimed in claim 2, wherein: A third lip (3122) is also formed on the main skeleton rubber layer (312), the third lip (3122) is in contact with and sealed to the outer wall of the flange (211), and a lubricating oil chamber I (5) is formed between the first lip (3121), the third lip (3122) and the transition ring skeleton (21).

Images