Self-lubricating oil seal metal skeleton

Abstract

This utility model discloses a self-lubricating oil seal metal skeleton, including a metal outer skeleton, a sealing lip connected to one side of the metal outer skeleton, a dustproof lip connected to one side of the sealing lip, and a lubrication mechanism provided inside the metal outer skeleton. The lubrication mechanism includes an oil storage ring located inside the metal outer skeleton, an oil outlet on one side of the oil storage ring, and an oil guide channel on the sealing lip, with the oil outlet communicating with the oil guide channel. This utility model forms a complete built-in lubrication system by setting an oil storage ring inside the metal outer skeleton and providing an oil guide channel communicating with it on the sealing lip. The oil storage ring can pre-store an appropriate amount of lubricating oil. During equipment operation, the lubricating oil is slowly released through the oil outlet and continuously transported to the friction interface between the sealing lip and the shaft through the oil guide channel, effectively establishing and maintaining a lubricating oil film. This design significantly reduces dry friction during startup and low-speed operation, lowers the coefficient of friction, and avoids lip wear caused by insufficient lubrication.

Description

Technical Field

[0001] This utility model relates to the field of oil seal technology, and more specifically, to a self-lubricating oil seal metal skeleton. Background Technology

[0002] Oil seals, as a crucial sealing element, are widely used in rotary shaft sealing systems in automobiles, construction machinery, motors, aerospace, and other fields. They are primarily used to prevent lubricating oil leakage and to prevent external contaminants such as dust and moisture from entering the equipment. Traditional oil seal structures typically consist of a metal skeleton, a rubber sealing body, a sealing lip, and a spring. The metal skeleton provides structural support, while the rubber portion performs the sealing function. The sealing lip is the key component of the rubber sealing body, designed as a blade-like structure that fits tightly against the surface of the rotating shaft. Under the preload of the spring, it maintains constant contact pressure on the shaft, forming a dynamic sealing interface. The spring is installed at the root or outside of the sealing lip to compensate for the elastic decay of the lip over long-term use and for shaft runout or eccentricity, ensuring a consistently stable sealing pressure.

[0003] However, in actual operation, especially under conditions of frequent start-stop, high-speed operation, or poor lubrication, traditional oil seals are prone to problems such as dry friction during startup, increased lip wear, and excessive temperature rise, leading to decreased sealing performance and even premature failure. In addition, oil seals also face challenges during installation. Because the metal skeleton and the housing are interference fit, misalignment can easily occur during installation, resulting in scratches on the sealing lip or deformation of the skeleton. Utility Model Content

[0004] In view of the problems in the related technologies, this utility model proposes a self-lubricating oil seal metal skeleton to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A self-lubricating oil seal metal skeleton includes a metal outer skeleton, a sealing lip connected to one side of the metal outer skeleton, a dustproof lip connected to one side of the sealing lip, a lubrication mechanism provided inside the metal outer skeleton, the lubrication mechanism including an oil storage ring provided inside the metal outer skeleton, an oil outlet provided on one side of the oil storage ring, an oil guide channel provided on the sealing lip, and the oil outlet communicating with the oil guide channel.

[0007] Furthermore, to facilitate the addition of lubricating oil into the oil reservoir ring, an oil filling port is provided at the top of the oil reservoir ring, and a sealing cap is connected inside the oil filling port.

[0008] Furthermore, the oil storage ring is connected to the metal outer skeleton.

[0009] Furthermore, a guide sleeve is provided on the outside of the metal outer frame, and a fixing ring is connected to the outside of the guide sleeve.

[0010] Furthermore, two elastic buckles are symmetrically connected to the outer side of the metal outer frame, and the fixing ring is provided with a slot, with the elastic buckles matching the slot.

[0011] Furthermore, one end of the elastic buckle passes through the slot and abuts against the retaining ring.

[0012] Furthermore, an oil seal spring is connected to the outer side of the sealing lip.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) A complete built-in lubrication system is formed by setting an oil reservoir ring inside the metal outer frame and setting an oil guide channel communicating with it at the sealing lip. The oil reservoir ring can store an appropriate amount of lubricating oil in advance. During the operation of the equipment, the lubricating oil is slowly released through the oil outlet and continuously transported to the friction interface between the sealing lip and the shaft through the oil guide channel, effectively establishing and maintaining the lubricating oil film. This design significantly reduces dry friction during startup and low-speed operation, reduces the coefficient of friction and temperature rise, and avoids lip wear, carbonization or premature failure caused by insufficient lubrication.

[0015] (2) By setting a guide sleeve on the outside of the metal outer frame, the oil seal can be guided smoothly into the housing hole during installation, effectively preventing scratches on the sealing lip or deformation of the frame caused by skew or jamming. The guide sleeve is connected to a fixing ring on the outside, which further enhances the integrity and stability of the guide structure, ensuring smooth installation and accurate positioning. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of a self-lubricating oil seal metal skeleton according to an embodiment of the present utility model;

[0018] Figure 2 This is a rear view of a self-lubricating oil seal metal frame according to an embodiment of the present utility model;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a structural diagram of a self-lubricating oil seal metal skeleton according to an embodiment of the present utility model;

[0021] Figure 5 yes Figure 3 Enlarged diagram of point B in the middle.

[0022] In the picture:

[0023] 1. Metal outer frame; 2. Sealing lip; 3. Dustproof lip; 4. Lubrication mechanism; 401. Oil reservoir ring; 402. Oil outlet; 403. Oil guide channel; 5. Oil filling port; 6. Sealing cap; 7. Guide sleeve; 8. Fixing ring; 9. Elastic buckle; 10. Slot; 11. Oil seal spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] According to an embodiment of the present invention, a self-lubricating oil seal metal skeleton is provided.

[0026] like Figures 1-5As shown, the self-lubricating oil seal metal skeleton according to an embodiment of the present invention includes a metal outer skeleton 1. The metal outer skeleton 1 serves as the main structural support for the entire oil seal. It is made of high-strength low-carbon steel or stainless steel and is precision stamped, possessing good rigidity and dimensional stability. This ensures that the oil seal does not deform during the pressing process and is firmly fixed in the mounting hole of the equipment housing. A sealing lip 2 is connected to one side of the metal outer skeleton 1. The free end of the sealing lip 2 has a blade-like structure, which can closely fit the surface of the rotating shaft to form a dynamic sealing interface, effectively preventing leakage of lubricating oil inside the equipment. A dustproof lip 3 is connected to one side of the sealing lip 2. The dustproof lip 3 and the sealing lip 2 are arranged coaxially to form a double-lip sealing structure. The main function of the dustproof lip 3 is to prevent dust, moisture, mud, particulate pollutants and other contaminants from the external environment from entering the equipment. An oil seal spring 11 is connected to the outside of the sealing lip 2. This spring is usually a helical or wave-shaped metal spring, which is arranged around the outer edge of the sealing lip 2. A lubrication mechanism 4 is provided inside the metal outer frame 1. The lubrication mechanism 4 includes an oil storage ring 401 located inside the metal outer frame 1. The oil storage ring 401 is connected to the metal outer frame 1. An oil outlet 402 is provided on one side of the oil storage ring 401. An oil guide channel 403 is provided on the sealing lip 2. The oil outlet 402 is connected to the oil guide channel 403. The inside of the oil storage ring 401 forms a closed oil storage cavity, which can be used to store an appropriate amount of lubricating oil. During equipment operation, lubricating oil can slowly flow out from the oil outlet 402 through capillary action and be continuously and evenly transported to the contact area between the sealing lip 2 and the shaft through the oil guide channel 403, forming a stable lubricating film. This significantly reduces dry friction wear during startup and low-speed operation, reduces frictional heat generation, and extends the service life of the oil seal. The top of the oil reservoir ring 401 is provided with an oil filling port 5 for adding lubricating oil into the oil reservoir ring 401. A sealing cap 6 is connected inside the oil filling port 5 to ensure the sealing of the oil reservoir ring 401 after adding lubricating oil.

[0027] like Figures 1-3 As shown, a guide sleeve 7 is provided on the outer side of the metal outer frame 1. The guide sleeve 7 has a ring structure with a guide cone surface at its front end. The size of the inner ring is consistent with that of the mounting shaft. This allows the oil seal to be smoothly guided into the housing mounting hole during the press-fitting process, avoiding scratches on the sealing lip 2 due to skewness or jamming. A fixing ring 8 is connected to the outer side of the guide sleeve 7. Two elastic buckles 9 are symmetrically arranged on the outer side of the metal outer frame 1. The elastic buckles 9 are made of metal or engineering plastic with a certain degree of elasticity and have a cantilever structure. A corresponding groove 10 is provided on the fixing ring 8. The elastic buckle 9 can elastically deform and pass through the groove 10 to abut against the end face of the fixing ring 8, forming a mechanical limit, thereby firmly fixing the guide sleeve 7 and the fixing ring 8 to the metal outer frame 1. This connection method requires no additional fasteners, is quick to install and easy to disassemble, and is suitable for automated assembly processes. Moreover, the symmetrically arranged double buckle structure distributes the force evenly, effectively improving the connection reliability and vibration resistance of the guide assembly.

[0028] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0029] When the equipment is in the start-up or low-speed operation state, the lubricating oil in the oil storage ring 401 is slowly released to the contact area between the sealing lip 2 and the rotating shaft through the oil outlet 402 and the oil guide channel 403 via mechanisms such as capillary action, thermal expansion effect or micro vibration. This stable lubricating film significantly reduces the coefficient of friction during initial startup, minimizes wear risk, and prevents overheating caused by dry friction, thereby extending the service life of the oil seal. During oil seal installation, the guide cone surface at the front end of the guide sleeve 7 plays a crucial role. The inner diameter of the guide sleeve 7 is precisely designed to be slightly larger than the outer diameter of the rotating shaft, ensuring a good fit clearance between the two. This allows for smooth sliding while preventing shaking or eccentricity during installation. By fitting the oil seal and guide sleeve 7 onto the rotating shaft, the inner end face of the guide sleeve 7 maintains stable contact with the surface of the rotating shaft during the pushing process, forming a reliable axial support and guiding reference. This ensures that the oil seal is smoothly pushed to the predetermined position along the correct path. After the oil seal is fully pressed into the predetermined position of the housing, the elastic buckles 9 on both sides of the metal outer frame 1 can be pressed symmetrically by hand or with a simple tool to cause elastic deformation and disengage from the slots 10 on the fixing ring 8, thereby allowing the guide sleeve 7 to be disassembled. After disassembly, the oil seal body returns to its standard working state without affecting the assembly and operation of subsequent equipment.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-lubricating oil seal metal skeleton, characterized by, The device includes a metal outer frame (1), a sealing lip (2) connected to one side of the metal outer frame (1), a dustproof lip (3) connected to one side of the sealing lip (2), a lubrication mechanism (4) provided inside the metal outer frame (1), the lubrication mechanism (4) including an oil storage ring (401) provided inside the metal outer frame (1), an oil outlet (402) provided on one side of the oil storage ring (401), an oil guide channel (403) provided on the sealing lip (2), and the oil outlet (402) connected to the oil guide channel (403).

2. A self-lubricating oil seal metal cage according to claim 1, wherein, The top of the oil storage ring (401) is provided with an oil filling port (5), and the inside of the oil filling port (5) is connected with a sealing cap (6).

3. A self-lubricating oil seal metal cage according to claim 1, wherein The oil reservoir ring (401) is connected to the metal outer skeleton (1).

4. The self-lubricating oil seal metal skeleton according to claim 1, characterized in that, The outer side of the metal outer frame (1) is provided with a guide sleeve (7), and a fixing ring (8) is connected to the outer side of the guide sleeve (7).

5. The self-lubricating oil seal metal skeleton according to claim 1, characterized in that, The metal outer frame (1) has two elastic buckles (9) symmetrically connected on the outside. The fixing ring (8) has a slot (10) and the elastic buckle (9) matches the slot (10).

6. The self-lubricating oil seal metal skeleton according to claim 1, characterized in that, One end of the elastic buckle (9) passes through the slot (10) and abuts against the fixing ring (8).

7. The self-lubricating oil seal metal skeleton according to claim 1, characterized in that, An oil seal spring (11) is connected to the outside of the sealing lip (2).

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