Modular quick-release hub oil seal

Abstract

The application discloses a modular quick-release hub oil seal, which comprises an oil seal sleeve, a first framework arranged in the oil seal sleeve, a first fastening ring arranged on one side of the oil seal sleeve and threadedly connected with the first framework, a first movable groove formed on the side of the oil seal sleeve facing the first fastening ring, a first ring spring arranged in the first movable groove, a first main lip arranged on the circumferential inner wall of the oil seal sleeve and communicated with the first movable groove, and a first limiting ring integrally arranged on the side of the first fastening ring facing the oil seal sleeve, wherein the first limiting ring is inserted into the first movable groove along the slotting direction of the first movable groove and abuts against the first ring spring and is tightly arranged in the first main lip. When the first fastening ring is screwed, the first limiting ring directly abuts against the first ring spring, so that the first main lip can obtain stable and uniform radial holding force, a reliable sealing interface is formed on the rotating shaft, the first main lip and the ring spring can be quickly disassembled and replaced as a module, and the whole oil seal does not need to be pried out like a traditional oil seal, so that the maintenance efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of wheel hub oil seals, and in particular to a modular quick-release wheel hub oil seal. Background Technology

[0002] Wheel hub oil seals are key sealing components of vehicles, installed between the wheel hub and the axle. Their main function is to prevent lubricating grease from leaking from the wheel hub cavity, while also blocking external contaminants such as dust and mud from entering, ensuring the normal operation of the bearing and driving safety. Traditional wheel hub oil seals are usually an integrated structure, consisting of a metal skeleton, spring, and rubber sealing lip vulcanized into shape.

[0003] When the sealing lip of an oil seal wears or ages due to long-term use, or when performing wheel hub maintenance, the entire oil seal must be forcibly pried out and pressed out of the wheel hub seat. This process is not only cumbersome, time-consuming, and labor-intensive, but it is also very easy to damage the sealing lip or outer edge of a new oil seal due to uneven force or improper operation when installing it, leading to the risk of secondary leakage.

[0004] In the existing technology, some attempts have been made to improve the oil seal structure through split design; however, most of these designs have significant defects: some use simple plug-in mating, which has poor connection reliability and is prone to loosening under high-frequency vibration and impact loads during vehicle operation, leading to seal failure; some have locking structures such as snap-fit ​​or threads, but often have insufficient locking force and poor vibration resistance, failing to truly achieve a balance between quick release and reliability. Summary of the Invention

[0005] To improve the ease of maintenance of wheel hub oil seals, a modular quick-release wheel hub oil seal is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution: A modular quick-release wheel hub oil seal includes an oil seal sleeve, a first skeleton inside the oil seal sleeve, a first fastening ring threadedly connected to the first skeleton on one side of the oil seal sleeve, a first movable groove on the side of the oil seal sleeve facing the first fastening ring, a first ring spring inside the first movable groove, a first main lip communicating with the first movable groove on the circumferential inner wall of the oil seal sleeve, and a first limiting ring integrally formed on the side of the first fastening ring facing the oil seal sleeve, wherein the first limiting ring is inserted into the first movable groove along the slotting direction of the first movable groove and presses against the first ring spring and is pressed against the first main lip.

[0007] By adopting the above technical solution, the first limiting ring can be inserted into or removed from the first movable groove by screwing on the first fastening ring, thereby completing the compression or release of the first main lip and its internal first ring spring. The first limiting ring directly and precisely presses against the first ring spring, ensuring that the first main lip can obtain a stable and uniform radial clamping force, thereby forming a reliable sealing interface on the rotating shaft. This allows the first main lip and the ring spring to be quickly disassembled and replaced as a module, without having to be pried out as a whole like traditional oil seals, greatly improving maintenance efficiency and avoiding damage to the sealing lip during installation.

[0008] Preferably, a locking ring protrusion is integrally formed on the circumferential outer wall of the oil seal sleeve, a locking ring is integrally formed on the side of the first fastening ring facing the oil seal sleeve, a locking ring groove for the locking ring to be inserted is opened on the side of the oil seal sleeve facing the first fastening ring, and a protrusion embedded in the locking ring protrusion is provided on the outer wall of the locking ring.

[0009] By adopting the above technical solution, when the first fastening ring is tightened, the locking ring is inserted into the locking ring groove, and the convex ring is tightly embedded in the locking ring convex part of the outer wall of the oil seal sleeve. This increases the radial pressure and static friction between the circumferential outer wall of the oil seal sleeve and the hub mounting hole, thereby greatly improving the overall stability and anti-creep and anti-rotation capabilities of the oil seal sleeve in its installation position.

[0010] Preferably, the oil seal sleeve is symmetrically provided with a second skeleton along a line perpendicular to its own axis, and the side of the oil seal sleeve facing away from the first fastening ring is provided with a second fastening ring that is threadedly connected to the second skeleton.

[0011] By adopting the above technical solution, both sides are supported and locked by metal frames and fastening rings, forming a robust frame structure, which significantly improves the rigidity and stability of the oil seal assembly in the wheel hub, making it more able to withstand various loads under complex working conditions.

[0012] Preferably, the oil seal sleeve has a second movable groove on the side facing the second fastening ring, and a second ring spring is provided in the second movable groove. The inner circumferential wall of the oil seal sleeve has a second main lip that communicates with the second movable groove. The second fastening ring is integrally formed with a second limiting ring on the side facing the oil seal sleeve. The second limiting ring is inserted into the second movable groove along the groove opening direction of the second movable groove and presses against the second ring spring, pressing it tightly against the second main lip.

[0013] By adopting the above technical solution, and by setting a first main lip and a second main lip, two independent and cooperative main sealing defense lines are formed. This layout greatly enhances the overall reliability of the sealing system. When one main lip temporarily reduces its sealing performance or fails partially due to extreme working conditions or long-term wear, the other main lip can still provide effective sealing protection, thereby significantly reducing the risk of leakage. It is particularly suitable for wheel hub systems with extremely high sealing requirements under heavy load, high speed or harsh environments.

[0014] Preferably, the ends of the first and second limiting rings inserted into the oil seal sleeve are both tapered.

[0015] By adopting the above technical solution, the conical structure plays a good guiding role, enabling the limiting ring to automatically center when inserted into the movable slot. The conical transition can achieve a smoother and more gradual compression of the ring spring, avoiding interference or jamming with the slot, and making the installation smoother.

[0016] Preferably, the oil seal sleeve is further provided with support rings that are perpendicularly connected to the first skeleton and the second skeleton.

[0017] By adopting the above technical solution, a contact area and support area far greater than that of conventional planar skeletons are provided. When it is encased in the oil seal sleeve and combined with the fastening ring, it can form a strong anchoring effect, which greatly enhances the structural rigidity and integrity of the entire oil seal module. It can effectively resist deformation caused by pressure and vibration during the press-fitting process and under complex working conditions, and ensure the stability of the sealing lip.

[0018] Preferably, the inner circumferential wall of the oil seal sleeve is provided with an outwardly inclined dustproof lip on the side of the first main lip away from the second main lip.

[0019] By adopting the above technical solution, the dustproof lip acts as an additional barrier, mainly used to block large pollutants such as dust and mud from the outside, protect the main lip inside from wear and corrosion by foreign objects, extend the service life of the main lip, and improve the overall environmental adaptability and durability of the oil seal.

[0020] Preferably, a metal strip is embedded inside the dustproof lip, and the end extension length of the dustproof lip is less than the end extension length of the first main lip.

[0021] By adopting the above technical solution, the angle of the dustproof lip can be adjusted by setting a metal strip inside the dustproof lip, and the dustproof lip does not contact the surface of the rotating shaft. On the one hand, it can prevent dust or large particles of foreign matter from entering the oil seal, and on the other hand, it avoids contact with the rotating shaft to avoid generating resistance.

[0022] Preferably, the first fastening ring has an adjusting ring integrally formed on the side facing away from the oil seal sleeve, and the inner wall of the adjusting ring is flush with the inner wall of the first fastening ring.

[0023] By adopting the above technical solution, the adjusting ring provides a point of leverage for standard wrenches, sockets and other tools, making it easier and more convenient to tighten or loosen the first fastening ring, and greatly improving the efficiency of on-site disassembly and assembly.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. A novel modular sealing structure is constructed through the synergistic mechanical action of the threaded drive and the axial pressing of the limiting ring. By tightening the fastening ring, the pressing and releasing of the limiting ring on the sealing main lip and its ring spring can be precisely controlled, enabling the core sealing module to be quickly and independently disassembled and assembled. This eliminates the outdated operation method of traditional integral oil seals that must be pried out and pressed in by force, greatly improving maintenance efficiency. 2. By setting up a double-sided main lip with ring springs, two independent and mutually backup main sealing defense lines are formed, which significantly improves the redundancy and reliability of the sealing system. At the same time, the outer side is provided with a non-contact dustproof lip containing a metal strip, which serves as a front barrier to effectively block external pollutants and protect the main sealing surface, achieving functional separation and synergistic protection of dust prevention and sealing. 3. An innovative auxiliary radial locking mechanism is designed, consisting of a locking ring, a convex ring, and a locking ring convex meshing with each other. This increases the friction and anti-rotation capability between the oil seal sleeve and the wheel hub mounting hole. Together with the main thread pair, it forms a double locking guarantee, effectively resisting high-frequency vibrations during vehicle operation, preventing the entire oil seal from loosening or creeping, and ensuring ultra-high reliability of the connection. Attached image description: Figure 1 This is a schematic diagram of the structure of a wheel hub oil seal; Figure 2 This is an exploded diagram of a wheel hub oil seal. Figure 3 for Figure 2 A sectional view; Figure 4 for Figure 1 A sectional view.

[0025] Reference numerals: 1. Oil seal sleeve; 11. First skeleton; 12. Second skeleton; 13. Support ring plate; 14. First movable groove; 15. Second movable groove; 16. First main lip; 17. Second main lip; 18. Locking ring protrusion; 19. Locking ring groove; 2. First fastening ring; 21. First limiting ring; 22. Adjusting ring; 23. Locking ring; 231. Protruding ring; 3. Second fastening ring; 31. Second limiting ring; 4. Connecting threaded ring; 5. First ring spring; 6. Second ring spring; 7. Dustproof lip; 71. Metal strip. Detailed implementation method: The following section provides a more detailed description, in conjunction with the accompanying diagrams: As attached Figure 1 and attached Figure 2 As shown, a modular quick-release wheel hub oil seal includes an oil seal sleeve 1, a first fastening ring 2, and a second fastening ring 3. The oil seal sleeve 1 is the main structure of the entire wheel hub oil seal. The material of the oil seal sleeve 1 can be a rubber material with certain strength and corrosion resistance, or a composite material of metal and rubber.

[0026] As attached Figure 2 and attached Figure 3 As shown, the oil seal sleeve 1 has a ring-shaped structure. The first skeleton 11 and the second skeleton 12 are embedded in the two sides of the oil seal sleeve 1 respectively. The first skeleton 11 and the second skeleton 12 are both ring-shaped sheet structures. The first skeleton 11 and the second skeleton 12 can be made of rigid material to ensure that the first skeleton 11 and the second skeleton 12 maintain high strength and do not deform inside the oil seal sleeve 1. The first skeleton 11 and the second skeleton 12 are coaxially arranged with the oil seal sleeve 1.

[0027] The oil seal sleeve 1 is also provided with two support rings 13. The support rings 13 are coaxially arranged with the oil seal sleeve 1. The two support rings 13 are respectively perpendicularly fixedly connected to the first skeleton 11 and the second skeleton 12. The end of the first skeleton 11 and the second skeleton 12 away from the support rings 13 is flush with the surface of the oil seal sleeve 1, and the interior of this end is integrally formed with internal threads.

[0028] As attached Figure 3 and attached Figure 4 As shown, both the first fastening ring 2 and the second fastening ring 3 are made of rigid material and are both annular structures. The first fastening ring 2 and the second fastening ring 3 are located on both sides of the oil seal sleeve 1. The first fastening ring 2 and the second fastening ring 3 are coaxially arranged with the oil seal sleeve 1. The circumferential inner walls of the first fastening ring 2 and the second fastening ring 3 are flush with the inner wall of the oil seal sleeve 1, and the circumferential outer walls of the first fastening ring 2 and the second fastening ring 3 are flush with the outer wall of the oil seal sleeve 1. The side of the first fastening ring 2 and the second fastening ring 3 facing the oil seal sleeve 1 is integrally formed with an external connecting threaded ring 4. The connecting threaded ring 4 of the first fastening ring 2 is connected to the internal thread of the first skeleton 11, and the connecting threaded ring 4 of the second fastening ring 3 is connected to the internal thread of the second skeleton 12.

[0029] The oil seal sleeve 1 has a first movable groove 14 along its own axis on the side facing the first fastening ring 2, and a second movable groove 15 along its own axis on the side facing the second fastening ring 3. The first movable groove 14 and the second movable groove 15 are symmetrically arranged on the axis perpendicular to the oil seal sleeve 1, and both the first movable groove 14 and the second movable groove 15 are annular grooves.

[0030] The oil seal sleeve 1 has a first main lip 16 and a second main lip 17 integrally formed on its circumferential inner wall. Both the first main lip 16 and the second main lip 17 are annular protrusion structures. The internal cavity of the first main lip 16 is connected to the bottom of the first movable groove 14, and the internal cavity of the second main lip 17 is connected to the bottom of the second movable groove 15. The first movable groove 14 and the second movable groove 15 are respectively provided with a first ring spring 5 and a second ring spring 6. The internal cavity of the first main lip 16 can be partially embedded in the first ring spring 5, and the internal cavity of the second main lip 17 can be partially embedded in the second ring spring 6. The first ring spring 5 and the second ring spring 6 are both made of spring steel and have good elasticity and toughness. The function of the first ring spring 5 and the second ring spring 6 is to provide elastic force to make the seal tighter.

[0031] The inner wall of the oil seal sleeve is provided with an outwardly inclined dustproof lip 7 on the side of the first main lip 16 away from the second main lip 17. The dustproof lip 7 is made of rubber and has a metal strip 71 embedded inside. The metal strip 71 can enhance the rigidity of the dustproof lip 7 and make it better maintain its shape. The end extension length of the dustproof lip 7 is less than the end extension length of the first main lip 16. In this way, it can block external dust and debris without affecting the sealing effect of the first main lip 16.

[0032] The first fastening ring 2 is integrally formed with a first limiting ring 21 on the side facing the oil seal sleeve 1. The first limiting ring 21 is inserted into the first movable groove 14 along the slotting direction of the first movable groove 14. When the first limiting ring 21 is inserted into the first movable groove 14 and presses against the first ring spring 5, the first ring spring 5 will be pressed and embedded in the internal cavity of the first main lip 16. The first ring spring 5 will produce elastic deformation and transmit the force to the first main lip 16, so that the first main lip 16 is tightly fitted with the surface of the wheel hub or axle, thereby achieving a sealing effect.

[0033] The second fastening ring 3 is integrally formed with a second limiting ring 31 on the side facing the oil seal sleeve 1. The second limiting ring 31 is inserted into the second movable groove 15 along the slotting direction of the second movable groove 15. When the second limiting ring 31 is inserted into the second movable groove 15 and presses against the second ring spring 6, the second ring spring 6 will be pressed and embedded in the internal cavity of the second main lip 17. The second ring spring 6 will produce elastic deformation and transmit the force to the second main lip 17, so that the second main lip 17 is tightly fitted with the surface of the wheel hub or axle, thereby achieving a sealing effect.

[0034] The end of the first limiting ring 21 inserted into the first movable groove 14 and the end of the second limiting ring 31 inserted into the second movable groove 15 are both tapered. The tapered structure plays a good guiding role, so that the first limiting ring 21 can be automatically aligned when inserted into the first movable groove 14 and the second limiting ring 31 can be inserted into the second movable groove 15. The tapered transition can achieve a more stable and gradual compression of the ring spring.

[0035] An adjusting ring 22 is integrally formed on the side of the first fastening ring 2 facing away from the oil seal sleeve 1. The adjusting ring 22 is coaxially arranged with the first fastening ring 2. The circumferential inner wall of the adjusting ring 22 is flush with the circumferential inner wall of the first fastening ring 2. The adjusting ring 22 provides a point of leverage, which makes it convenient for operators to install and remove the first fastening ring 2, increasing the convenience of operation.

[0036] The oil seal sleeve 1 is integrally formed with a locking ring protrusion 18 on its circumferential outer wall. The first fastening ring 2 is integrally formed with a locking ring 23 on the side facing the oil seal sleeve 1. The locking ring 23 is a ring-shaped plate structure, and a protruding ring 231 is integrally formed on the outer wall of the bottom end of the locking ring 23. The oil seal sleeve 1 has a locking ring groove 19 on the side facing the first fastening ring 2 for the locking ring 23 to be inserted. The bottom of the locking ring groove 19 is connected to the internal cavity of the locking ring protrusion 18. When the first fastening ring 2 is tightened, the locking ring 23 is slowly inserted into the locking ring groove 19. The protruding ring 231 on the locking ring 23 will be tightly embedded in the locking ring protrusion 18 on the outer wall of the oil seal sleeve 1, which increases the radial pressure and static friction between the circumferential outer wall of the oil seal sleeve 1 and the hub mounting hole, thereby greatly improving the overall stability and anti-creep and anti-rotation capabilities of the oil seal sleeve 1 in its installation position.

[0037] The implementation principle of this embodiment is as follows: By screwing in the first fastening ring 2 and the second fastening ring 3 with a tool, the first limiting ring 21 and the second limiting ring 31 move axially and are inserted into the first movable groove 14 and the second movable groove 15 on the oil seal sleeve 1, respectively. The conical structure at the front end of the limiting ring plays a guiding and centering role, allowing it to be smoothly inserted and begin to press against the first ring spring 5 and the second ring spring 6 in the groove. The ring springs generate radial expansion elastic force under pressure, which is accurately transmitted to the first main lip 16 and the second main lip 17 that are connected to the movable groove, forcing the main lip to undergo radial deformation, thereby forming a tight and uniform pressing contact with the surface of the rotating shaft and establishing the main sealing defense line. When replacement is needed, simply loosen the first fastening ring 2 in the reverse direction. The first limiting ring 21 will then exit from the first movable groove 14, and the first ring spring 5 and the first main lip 16 will reset. Then, loosen the oil seal sleeve 1 in the reverse direction to disassemble the oil seal sleeve 1 from the second fastening ring 3. The oil seal sleeve 1 can be removed separately, thus achieving the effects of convenient maintenance, avoiding damage, and ensuring the accuracy of repeated installation.

[0038] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A modular quick-release wheel hub oil seal, comprising an oil seal sleeve (1), characterized in that, The oil seal sleeve (1) is provided with a first skeleton (11). One side of the oil seal sleeve (1) is provided with a first fastening ring (2) that is threadedly connected to the first skeleton (11). The oil seal sleeve (1) has a first movable groove (14) on the side facing the first fastening ring (2). A first ring spring (5) is provided in the first movable groove (14). The inner wall of the oil seal sleeve (1) is provided with a first main lip (16) that communicates with the first movable groove (14). The first fastening ring (2) is integrally formed with a first limiting ring (21) on the side facing the oil seal sleeve (1). The first limiting ring (21) is inserted into the first movable groove (14) along the slotting direction of the first movable groove (14) and presses against the first ring spring (5) and is pressed against the first main lip (16).

2. The modular quick-release wheel hub oil seal according to claim 1, characterized in that, The oil seal sleeve (1) has an integrally formed locking ring protrusion (18) on its circumferential outer wall. The first fastening ring (2) has an integrally formed locking ring (23) on the side facing the oil seal sleeve (1). The oil seal sleeve (1) has a locking ring groove (19) on the side facing the first fastening ring (2) for the locking ring (23) to be inserted. The outer wall of the locking ring (23) has a protrusion (231) embedded in the locking ring protrusion (18).

3. The modular quick-release wheel hub oil seal according to claim 1, characterized in that, The oil seal sleeve (1) is symmetrically provided with a second skeleton (12) along a direction perpendicular to its own axis. The oil seal sleeve (1) is provided with a second fastening ring (3) that is threadedly connected to the second skeleton (12) on the side opposite to the first fastening ring (2).

4. A modular quick-release wheel hub oil seal according to claim 3, characterized in that, The oil seal sleeve (1) has a second movable groove (15) on the side facing the second fastening ring (3). A second ring spring (6) is provided in the second movable groove (15). A second main lip (17) communicating with the second movable groove (15) is provided on the inner wall of the oil seal sleeve (1) in the circumferential direction. A second limiting ring (31) is integrally formed on the side facing the oil seal sleeve (1). The second limiting ring (31) is inserted into the second movable groove (15) along the groove opening direction of the second movable groove (15) and presses against the second ring spring (6) and is pressed against the second main lip (17).

5. A modular quick-release wheel hub oil seal according to claim 4, characterized in that, The first limiting ring (21) and the second limiting ring (31) are both tapered at the end that is inserted into the oil seal sleeve (1).

6. A modular quick-release wheel hub oil seal according to claim 4, characterized in that, The oil seal sleeve (1) is also provided with a support ring (13) that is perpendicularly connected to the first skeleton (11) and the second skeleton (12).

7. A modular quick-release wheel hub oil seal according to claim 1, characterized in that, The oil seal sleeve (1) has an outwardly inclined dustproof lip (7) on the side of the first main lip (16) away from the second main lip (17) on its circumferential inner wall.

8. A modular quick-release wheel hub oil seal according to claim 7, characterized in that, The dustproof lip (7) has a metal strip (71) embedded inside, and the end extension length of the dustproof lip (7) is less than the end extension length of the first main lip (16).

9. A modular quick-release wheel hub oil seal according to claim 1, characterized in that, The first fastening ring (2) has an integrally formed adjusting ring (22) on the side facing away from the oil seal sleeve (1), and the inner wall of the adjusting ring (22) is flush with the inner wall of the first fastening ring (2).

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