High-pressure PTFE hub oil seal

Abstract

The utility model discloses a high-pressure PTFE hub oil seal which comprises a PTFE outer lip, the bottom of the PTFE outer lip is fixedly connected with a PTFE bottom shell, the inner wall of the PTFE outer lip is fixedly connected with a metal framework, the top of the PTFE bottom shell is fixedly connected with an annular compression-resistant pad, and the outer side of the annular compression-resistant pad is fixedly connected with the inner wall of the PTFE outer lip. The PTFE bottom shell is arranged to integrate the bottoms of all components of the oil seal so that the bottoms can not fall off easily, the sealing performance and the high-pressure-resistant effect of the bottoms of the oil seal are improved, the metal framework and the PTFE outer lip are arranged so that the outer contour of the oil seal can be kept round, deformation of the oil seal is avoided, and the service life of the oil seal is prolonged. The pressure of vibration on the oil seal can be effectively reduced through the memory metal ring and the cushioning energy-absorbing ring, the pressure resistance of the oil seal is improved, grease in the oil seal can be sucked into the oil seal by arranging the oil suction bag pipe when the oil seal is extruded, grease leakage is avoided, and the sealing performance of the oil seal is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to a high-pressure PTFE wheel hub oil seal. Background Art

[0002] Oil seal is a common name for general seals, which simply means the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and also refers to general liquid substances). It isolates the parts that need lubrication from the output parts in the transmission parts to prevent the lubricating oil from leaking. The seals used for static seals and dynamic seals (generally reciprocating motion) are called oil seals.

[0003] After searching, the Chinese patent application No. 202320556013.1 discloses an automobile wheel hub oil seal, including an oil seal skeleton mechanism and an anti-skid mechanism, and the anti-skid mechanism is installed on the oil seal skeleton mechanism; the oil seal skeleton mechanism includes an outer shell, a first metal skeleton, and a second metal skeleton, and the oil seal skeleton mechanism includes an outer shell, a first metal skeleton, a second metal skeleton, a third metal skeleton, a rubber shell and a rubber ring, the outer shell is an annular shell, the first metal skeleton is installed inside the outer shell, the second metal skeleton is installed on the outer shell, the third metal skeleton is bonded to the inner side wall of the outer shell, the rubber shell is bonded to the third metal skeleton, and the rubber ring is integrally formed on the rubber shell. The second metal frame of the patent is connected to the first metal frame, and the top side of the second metal frame is clamped in the outer shell, and the bottom is clamped on the rubber shell, so that the cross-section of the second metal frame, the third metal frame, the first metal frame and the rubber shell constitute an annular structure, making the utility model more stable as a whole. Although the second metal frame, the third metal frame and the first metal frame rigid structure are set in the outer shell of the present application, a rubber shell is also set to play a supporting role, which will not excessively affect the elastic function of the outer shell and will not affect the essential function of the wheel hub oil seal, thereby increasing its stability.

[0004] Although the above patent increases the stability of the wheel hub oil seal without affecting its essential function, in actual use, the oil seal will be subjected to great pressure when used for a long time. Simply relying on the metal frame cannot withstand the pressure when the oil seal is in use. Under high pressure, the metal frame is prone to deformation, resulting in the oil seal not being sealed tightly and oil leakage, which reduces the service life of the oil seal and brings inconvenience to users.

[0005] Therefore, it is necessary to carry out transformation to improve the oil seal's ability to withstand high pressure, avoid deformation of the oil seal after long-term use, resulting in poor sealing and oil leakage, increase the service life of the oil seal, and facilitate user use. Utility Model Content

[0006] In order to solve the problems raised in the above-mentioned background technology, the purpose of the utility model is to provide a high-pressure PTFE wheel hub oil seal, which has the advantages of improving the high-pressure resistance of the oil seal, avoiding deformation of the oil seal due to long-term use, increasing the service life of the oil seal, and facilitating the use of users. It solves the problem that the oil seal is easily deformed under high pressure, resulting in oil leakage due to loose sealing of the oil seal, reducing the service life of the oil seal, and causing inconvenience to users.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pressure PTFE wheel hub oil seal, comprising a PTFE outer lip, the bottom of the PTFE outer lip is fixedly connected to a PTFE bottom shell, the inner wall of the PTFE outer lip is fixedly connected to a metal skeleton, the top of the PTFE bottom shell is fixedly connected to an annular pressure-resistant pad, the outer side of the annular pressure-resistant pad is fixedly connected to the inner wall of the PTFE outer lip, the top of the PTFE bottom shell is fixedly connected to a memory metal ring located on the inner side of the annular pressure-resistant pad, the outer side of the memory metal ring is fixedly connected to the inner side of the annular pressure-resistant pad, and the memory metal ring is fixedly connected to the inner side of the annular pressure-resistant pad. A shock-absorbing ring is fixedly connected to the top of the metal ring, the outer side of the shock-absorbing ring is fixedly connected to the inner side of the annular pressure-resistant pad, the top of the PTFE bottom shell is fixedly connected to a PTFE inner lip located on the inner side of the memory metal ring and the shock-absorbing ring, the outer sides of the memory metal ring and the shock-absorbing ring are fixedly connected to the outer side of the PTFE inner lip, a number of evenly distributed oil absorption bag tubes are fixedly connected above the outer side of the PTFE inner lip, one end of the oil absorption bag tube away from the PTFE inner lip is fixedly connected to the inner side of the PTFE outer lip, and a number of oil absorption holes are opened on the top of the oil absorption bag tube.

[0008] As a preferred embodiment of the utility model, a steel wire rope is arranged inside the oil absorption bag tube, and two ends of the steel wire rope are respectively fixedly connected to the inner side of the PTFE outer lip and the outer side of the PTFE inner lip.

[0009] As a preferred embodiment of the present invention, a sealing ring is fixedly connected to the top of the shock-absorbing and energy-absorbing ring, and the inner side of the sealing ring is fixedly connected to the outer side of the PTFE inner lip.

[0010] As a preferred embodiment of the present invention, the inner surface of the PTFE inner lip is provided with an anti-skid layer, and the inner surface of the anti-skid layer is provided with anti-skid patterns.

[0011] As a preferred embodiment of the present invention, the number of the oil suction bag tubes is eight, and the number of the oil suction holes is three.

[0012] As a preferred embodiment of the present invention, a PTFE anti-seepage ring is fixedly connected to the upper part of the outer side of the PTFE inner lip.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model integrates the bottoms of various components of the oil seal by arranging a PTFE bottom shell so that it is not easy to fall off, thereby improving the sealing performance and high-pressure resistance of the bottom of the oil seal. By arranging a metal skeleton and a PTFE outer lip, the outer contour of the oil seal can be kept circular to avoid deformation of the oil seal. The memory metal ring and the shock-absorbing energy-absorbing ring can effectively reduce the pressure on the oil seal caused by vibration, thereby improving the pressure resistance of the oil seal. By arranging an oil suction bag tube, the grease inside the oil seal can be sucked into the inside when the oil seal is squeezed, thereby avoiding grease leakage and improving the sealing performance of the oil seal.

[0015] 2. The utility model strengthens the connection between the PTFE outer lip and the PTFE inner lip by setting a steel wire rope, so that the PTFE outer lip and the PTFE inner lip can stretch each other, so that they can maintain a parallel state when under pressure, avoiding the increase in the distance between the PTFE outer lip and the PTFE inner lip, which causes the oil seal to deform and leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0018] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the utility model;

[0019] Figure 4 For this utility model Figure 1 A is a schematic diagram of the enlarged structure.

[0020] In the figure: 1. PTFE outer lip; 2. PTFE bottom shell; 3. Metal frame; 4. Annular pressure pad; 5. Memory metal ring; 6. Shock-absorbing energy-absorbing ring; 7. PTFE inner lip; 8. Oil suction bag tube; 9. Oil suction hole; 10. Steel wire rope; 11. Sealing ring; 12. Anti-slip layer; 13. PTFE anti-seepage ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figures 1 to 4As shown, the utility model provides a high-pressure PTFE wheel hub oil seal, comprising a PTFE outer lip 1, the bottom of the PTFE outer lip 1 is fixedly connected to a PTFE bottom shell 2, the inner wall of the PTFE outer lip 1 is fixedly connected to a metal skeleton 3, the top of the PTFE bottom shell 2 is fixedly connected to an annular pressure-resistant pad 4, the outer side of the annular pressure-resistant pad 4 is fixedly connected to the inner wall of the PTFE outer lip 1, the top of the PTFE bottom shell 2 is fixedly connected to a memory metal ring 5 located inside the annular pressure-resistant pad 4, the outer side of the memory metal ring 5 is fixedly connected to the inner side of the annular pressure-resistant pad 4, and the top of the memory metal ring 5 is fixedly connected to A shock-absorbing and energy-absorbing ring 6 is connected, the outer side of the shock-absorbing and energy-absorbing ring 6 is fixedly connected to the inner side of the annular pressure-resistant pad 4, the top of the PTFE bottom shell 2 is fixedly connected to a PTFE inner lip 7 located on the inner side of the memory metal ring 5 and the shock-absorbing and energy-absorbing ring 6, the outer sides of the memory metal ring 5 and the shock-absorbing and energy-absorbing ring 6 are both fixedly connected to the outer side of the PTFE inner lip 7, a number of evenly distributed oil absorption bag tubes 8 are fixedly connected to the upper side of the outer side of the PTFE inner lip 7, the end of the oil absorption bag tube 8 away from the PTFE inner lip 7 is fixedly connected to the inner side of the PTFE outer lip 1, and a number of oil absorption holes 9 are opened on the top of the oil absorption bag tube 8.

[0023] refer to Figure 3 A steel wire rope 10 is arranged inside the oil suction bag tube 8, and two ends of the steel wire rope 10 are fixedly connected to the inner side of the PTFE outer lip 1 and the outer side of the PTFE inner lip 7 respectively.

[0024] As a technical optimization scheme of the utility model, the connection between the PTFE outer lip 1 and the PTFE inner lip 7 is strengthened by setting a steel wire rope 10, so that the PTFE outer lip 1 and the PTFE inner lip 7 can stretch each other and maintain a parallel state when under pressure, thereby avoiding the situation where the distance between the PTFE outer lip 1 and the PTFE inner lip 7 becomes larger, causing the oil seal to deform and leak oil.

[0025] refer to Figure 1 A sealing ring 11 is fixedly connected to the top of the shock-absorbing ring 6 , and the inner side of the sealing ring 11 is fixedly connected to the outer side of the PTFE inner lip 7 .

[0026] As a technical optimization solution of the utility model, by providing a sealing ring 11, the sealing effect of the oil seal is further enhanced, thereby preventing the grease inside the oil seal from being subjected to high pressure and being immersed in the gap between the PTFE inner lip 7 and the shock-absorbing energy-absorbing ring 6, causing oil leakage from the oil seal.

[0027] refer to Figure 1 The inner surface of the PTFE inner lip 7 is provided with an anti-skid layer 12, and the inner surface of the anti-skid layer 12 is provided with anti-skid patterns.

[0028] As a technical optimization solution of the utility model, the anti-skid layer 12 is provided to increase the friction between the inner surface of the oil seal and the surface of the shaft when the oil seal is installed, thereby preventing the oil seal from slipping and rotating during use, which affects normal use.

[0029] refer to Figure 1 The number of the oil suction bag tubes 8 is eight, and the number of the oil suction holes 9 is three.

[0030] As a technical optimization scheme of the utility model, by setting eight oil suction bag tubes 8, the grease inside the oil seal can be fully sucked in and the pressure can be relieved, thereby improving the high-pressure resistance of the oil seal. By setting three oil suction holes 9, the grease can be sucked into the oil suction bag tube 8 more quickly.

[0031] refer to Figure 1 A PTFE anti-seepage ring 13 is fixedly connected to the upper part of the outer side of the PTFE inner lip 7.

[0032] As a technical optimization solution of the utility model, by setting the PTFE anti-seepage ring 13, the grease on the top of the oil seal is blocked, thereby preventing the grease from seeping out from the top of the PTFE inner lip 7 when the oil seal is in use and affecting the normal use, thereby further improving the sealing effect of the oil seal.

[0033] The working principle and use process of the utility model are as follows: by setting the PTFE bottom shell 2, the bottoms of various components of the oil seal are integrated to prevent them from falling off, thereby improving the sealing and high-pressure resistance of the bottom of the oil seal; by setting the metal skeleton 3 and the PTFE outer lip 1, the outer contour of the oil seal can be kept circular to avoid deformation of the oil seal; by using the memory metal ring 5 and the shock-absorbing energy-absorbing ring 6, the pressure on the oil seal caused by vibration can be effectively reduced to improve the pressure resistance of the oil seal; by setting the oil suction bag tube 8, the grease inside the oil seal can be sucked into the inside when the oil seal is squeezed to avoid grease leakage, thereby improving the sealing of the oil seal.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure PTFE wheel hub oil seal, comprising a PTFE outer lip (1), characterized in that: The bottom of the PTFE outer lip (1) is fixedly connected to a PTFE bottom shell (2), the inner wall of the PTFE outer lip (1) is fixedly connected to a metal frame (3), the top of the PTFE bottom shell (2) is fixedly connected to an annular pressure-resistant pad (4), the outer side of the annular pressure-resistant pad (4) is fixedly connected to the inner wall of the PTFE outer lip (1), the top of the PTFE bottom shell (2) is fixedly connected to a memory metal ring (5) located inside the annular pressure-resistant pad (4), the outer side of the memory metal ring (5) is fixedly connected to the inner side of the annular pressure-resistant pad (4), the top of the memory metal ring (5) is fixedly connected to a shock-absorbing energy-absorbing ring (6), and the shock-absorbing energy-absorbing ring ( The outer side of the PTFE bottom shell (2) is fixedly connected to the inner side of the annular pressure-resistant pad (4); the top of the PTFE bottom shell (2) is fixedly connected to a PTFE inner lip (7) located on the inner side of the memory metal ring (5) and the shock-absorbing energy-absorbing ring (6); the outer sides of the memory metal ring (5) and the shock-absorbing energy-absorbing ring (6) are fixedly connected to the outer side of the PTFE inner lip (7); a number of uniformly distributed oil absorption bag tubes (8) are fixedly connected above the outer side of the PTFE inner lip (7); one end of the oil absorption bag tube (8) away from the PTFE inner lip (7) is fixedly connected to the inner side of the PTFE outer lip (1); and a number of oil absorption holes (9) are opened on the top of the oil absorption bag tube (8).

2. A high-pressure PTFE wheel hub oil seal according to claim 1, characterized in that: A steel wire rope (10) is arranged inside the oil absorption bag tube (8), and two ends of the steel wire rope (10) are respectively fixedly connected to the inner side of the PTFE outer lip (1) and the outer side of the PTFE inner lip (7).

3. A high-pressure PTFE wheel hub oil seal according to claim 1, characterized in that: A sealing ring (11) is fixedly connected to the top of the shock-absorbing energy-absorbing ring (6), and the inner side of the sealing ring (11) is fixedly connected to the outer side of the PTFE inner lip (7).

4. A high-pressure PTFE wheel hub oil seal according to claim 1, characterized in that: The inner surface of the PTFE inner lip (7) is provided with an anti-skid layer (12), and the inner surface of the anti-skid layer (12) is provided with anti-skid patterns.

5. The high-pressure PTFE wheel hub oil seal according to claim 1, characterized in that: The number of the oil suction bag tubes (8) is eight, and the number of the oil suction holes (9) is three.

6. A high-pressure PTFE wheel hub oil seal according to claim 1, characterized in that: A PTFE anti-seepage ring (13) is fixedly connected to the upper part of the outer side of the PTFE inner lip (7).

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