Self-closing type reverse anti-leakage oil seal structure

Abstract

The utility model discloses a self-closing type reverse anti-leakage oil seal structure which comprises an upper oil seal seat, a lower oil seal seat attached to the lower portion of the upper oil seal seat and a connecting shaft penetrating through the inner sides of the middles of the upper oil seal seat and the lower oil seal seat. The self-closing type reverse anti-leakage oil seal structure used for being connected with a shaft is arranged in the oil seal upper base and the oil seal lower base, and an anti-disengaging structure is arranged above the self-closing type reverse anti-leakage oil seal structure. The upper side of the outer end of the oil seal lower seat is fixedly connected with limiting rods which are arranged in a central symmetry mode. The self-closing type reverse anti-leakage oil seal structure comprises a sealing lip, a framework sleeve, a limiting plate, a PTFE lip piece, a functional groove, a first tension spring and a second tension spring. According to the self-closing type reverse anti-leakage oil seal structure, the oil seal structure can be conveniently connected and assembled, good stability and reliability are achieved, self-closing type reverse anti-leakage of the oil seal structure is facilitated, and pollutants can be effectively prevented from entering the oil seal.

Description

Technical Field

[0001] This utility model relates to the field of oil seal structure technology, specifically a self-closing reverse anti-leakage oil seal structure. Background Technology

[0002] Oil seals are widely used in machinery, industrial equipment, and the automotive industry, such as in engines, transmissions, and hydraulic presses, to maintain lubrication, prevent contaminants from entering, and improve efficiency and performance.

[0003] For example, Chinese utility model patent CN217234334U discloses an oil seal structure, relating to the field of oil seal technology. It includes a fixed ring and a rotating ring, which do not directly abut against each other and form an oil-blocking gap. The oil-blocking gap extends circumferentially around the axis of the fixed ring and is annular. Oil sealing is achieved through the oil-blocking gap. Since the fixed ring and rotating ring do not abut against each other, wear is reduced, resulting in a less prone-to-damage effect. This makes the oil seal structure more durable and stable. Furthermore, it reduces energy loss caused by friction, leading to better energy utilization.

[0004] For example, Chinese utility model patent CN219413525U discloses an oil seal structure, including a sealing body, a skeleton, a spring, and a PTFE sheet; the sealing body is sleeved on the outer side of the skeleton, and a contact ring is provided on the inner side of the skeleton. The contact ring has a spring cavity for accommodating the spring and a contact cavity for accommodating the PTFE sheet; this solution places the PTFE sheet on the inner side of the contact ring, which will make surface contact with the main lip. In the prior art, such as... Figure 1 As shown, the actual function of the oil seal relies on the contact between the main lip of the oil seal and the shaft for oil sealing. The problem is that the rubber has a high coefficient of friction. Under harsh conditions such as high temperature and high speed, the temperature of the main lip rises significantly, the wear width increases, and the oil seal is prone to failure, eventually leading to oil leakage. In contrast, this solution uses surface contact, which greatly increases the area of ​​the oil seal, ensuring the sealing effect of the oil seal under conditions such as high temperature and high speed, and avoiding oil leakage.

[0005] However, existing oil seal structures still have some problems during use. For example, it is generally inconvenient to connect and assemble the oil seal structure, making it difficult to achieve good stability and reliability. Furthermore, it is not convenient to make the oil seal structure self-closing and reverse leak-proof, leaving the possibility of contaminants entering the oil seal. Therefore, we propose a self-closing reverse leak-proof oil seal structure to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a self-closing reverse anti-leakage oil seal structure to solve the problems that still exist in the existing oil seal structure mentioned in the background art during use, such as the inconvenience of connecting and assembling the oil seal structure, the difficulty in making it have good stability and reliability, and the inconvenience of making the oil seal structure self-closing reverse anti-leakage, which may lead to the problem of contaminants entering the oil seal.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a self-closing reverse anti-leakage oil seal structure, including an upper oil seal seat, a lower oil seal seat fitted below the upper oil seal seat, and a connecting shaft penetrating the inner side of the middle of the upper oil seal seat and the lower oil seal seat;

[0008] Also includes:

[0009] The upper and lower oil seal seats are equipped with a self-closing reverse anti-leakage oil seal structure for connecting the shaft, and an anti-detachment structure is provided above the self-closing reverse anti-leakage oil seal structure.

[0010] Preferably, a limiting rod is fixedly connected to the upper outer end of the lower oil seal seat, and the limiting rod is nested and fitted to the inner outer end of the upper oil seal seat.

[0011] Preferably, the self-closing reverse leak-proof oil seal structure includes a sealing lip, a skeleton sleeve, a limiting plate, a PTFE lip, a functional groove, a first tension spring, and a second tension spring. The upper oil seal seat is nested with a sealing lip that fits and connects to the lower oil seal seat. The sealing lip is surrounded by a skeleton sleeve and a limiting plate for limiting. The middle part of the sealing lip is surrounded by a PTFE lip, a functional groove, a first tension spring, and a second tension spring for sealing.

[0012] Preferably, the outer end of the sealing lip is snapped and fitted with a skeleton sleeve, and the skeleton sleeve is nested and fitted inside the upper oil seal seat and the lower oil seal seat. A limiting plate that fits and is fitted to the upper oil seal seat and the sealing lip is symmetrically arranged in the center of the skeleton sleeve.

[0013] Preferably, the PTFE lip is glued and fixedly connected to the inner side of the upper end of the sealing lip, and the PTFE lip is fitted to the connecting shaft. Functional grooves are evenly spaced inside the PTFE lip, and a first tension spring and a second tension spring are nested and fitted to the outer sides of the upper and lower ends of the sealing lip, respectively.

[0014] Preferably, the anti-detachment structure includes a limiting plate and a pressure spring, with the limiting plate nested and attached to the outside of the connecting shaft, and the pressure springs are fixedly attached to the limiting plate and arranged symmetrically in the center, and the pressure springs are located on the inner side of the upper end of the oil seal seat.

[0015] Preferably, the limiting plate is located on the inner side of the upper end of the skeleton sleeve, and the limiting plate is snapped and attached to the outside of the limiting plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the self-closing reverse anti-leakage oil seal structure is convenient for connecting and assembling the oil seal structure, and has good stability and reliability. It is convenient for the oil seal structure to perform self-closing reverse anti-leakage, and can effectively prevent contaminants from entering the oil seal.

[0017] 1. The system is equipped with an upper oil seal seat, a lower oil seal seat, a limiting rod, and a connecting shaft. The lower oil seal seat is fitted under the upper oil seal seat, and a limiting rod is symmetrically fixed to the center of the lower oil seal seat, nesting and fitting with it. A connecting shaft with an outer nested and fitted sealing lip passes through the upper and lower oil seal seats. A skeleton sleeve with a nested and fitted outer snap-fit ​​is attached to the outer edge of the sealing lip, and a limiting plate with a nested and fitted outer edge is symmetrically arranged on the upper middle part of the outer end of the skeleton sleeve, nesting and fitting with the upper oil seal seat and the sealing lip. A limiting plate with a nested and fitted outer edge is attached to the connecting shaft. Therefore, the oil seal structure is easy to connect and assemble, and has good stability and reliability.

[0018] 2. The seal is equipped with a sealing lip, a limiting plate, a PTFE lip piece, and functional grooves. The upper inner side of the sealing lip is fixedly attached to a PTFE lip piece that fits into the connecting shaft. Functional grooves are evenly spaced inside the PTFE lip piece. The upper and lower outer sides of the sealing lip are respectively snapped with a first tension spring and a second tension spring. A limiting plate is attached to the sealing lip and nested with the connecting shaft and the limiting plate. A pressure spring is fixedly connected to the limiting plate and arranged symmetrically in the center. Therefore, the oil seal structure can perform self-closing reverse leakage prevention and can effectively prevent contaminants from entering the oil seal. Attached Figure Description

[0019] Figure 1 This is a frontal cross-sectional view of the present invention.

[0020] Figure 2 This is a top view of the structure of this utility model;

[0021] Figure 3 This is a top view cross-sectional three-dimensional structural diagram of the present invention;

[0022] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0023] Figure 5 This is a top-view three-dimensional structural diagram of the connection between the lower oil seal seat and the limiting rod of this utility model.

[0024] In the diagram: 1. Upper oil seal seat; 2. Lower oil seal seat; 3. Limiting rod; 4. Connecting shaft; 5. Sealing lip; 6. Skeleton sleeve; 7. Limiting plate; 8. PTFE lip; 9. Functional groove; 10. First tension spring; 11. Second tension spring; 12. Limiting plate; 13. Pressure spring. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-5 This utility model provides a technical solution: a self-closing reverse anti-leakage oil seal structure, including an upper oil seal seat 1, a lower oil seal seat 2, a limiting rod 3, a connecting shaft 4, a sealing lip 5, a skeleton sleeve 6, a limiting plate 7, a PTFE lip 8, a functional groove 9, a first tension spring 10, a second tension spring 11, a limiting plate 12, and a pressure spring 13. The lower oil seal seat 2 is fitted under the upper oil seal seat 1, and the connecting shaft 4 penetrates the inner side of the middle of the upper oil seal seat 1 and the lower oil seal seat 2. The upper oil seal seat 1 and the lower oil seal seat 2 are equipped with... The self-closing reverse anti-leakage oil seal structure for connecting shaft 4 includes a sealing lip 5, a skeleton sleeve 6, a limiting plate 7, a PTFE lip 8, a functional groove 9, a first tension spring 10, and a second tension spring 11. The sealing lip 5 is nested inside the upper oil seal seat 1 and is fitted and connected to the lower oil seal seat 2. An anti-detachment structure is provided above the self-closing reverse anti-leakage oil seal structure. The anti-detachment structure includes a limiting plate 12 and a pressure spring 13. The limiting plate 12 is nested and fitted to the outside of the connecting shaft 4.

[0027] To address the problems in existing technologies, such as the inconvenience of connecting and assembling oil seal structures, the difficulty in achieving good stability and reliability, the lack of self-sealing reverse leakage prevention, and the potential for contaminants to enter the oil seal, this embodiment employs the following technical solution: Figure 1 , Figure 2 , Figure 3 and Figure 5First, the lower oil seal seat 2 can be nested on the outside of the connecting shaft 4. Then, the sealing lip 5, which has the skeleton sleeve 6, the first tension spring 10, and the second tension spring 11 attached to the outside of the connecting shaft 4, can be nested and attached to the outside of the connecting shaft 4, so that the outer sides of the sealing lip 5, the sealing lip 5, and the second tension spring 11 are attached to the lower oil seal seat 2. Next, the upper oil seal seat 1 can be nested and attached to the outside of the skeleton sleeve 6, so that the lower end of the upper oil seal seat 1 is nested and attached to the outside of the limiting rod 3 that is centrally fixed on the lower oil seal seat 2. Then, the limiting plate 7 can be centrally and symmetrically arranged inside the skeleton sleeve 6, so that the upper and lower ends of the skeleton sleeve 6 are attached to the upper oil seal seat 1 and the sealing lip 5 respectively. Then, the limiting plate 12, which has the pressure spring 13 centrally and symmetrically fixed on the outside, can be nested inside the upper end of the skeleton sleeve 6, so that the limiting plate 12 is attached to the limiting plate 7, so as to complete the connection and assembly of the oil seal structure.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4 During the use of this oil seal structure, the sealing lip 5 is fitted and limited by the lower oil seal seat 2, the skeleton sleeve 6, and the limiting plate 7. The upper oil seal seat 1 fits and limits the skeleton sleeve 6 and the limiting plate 7. A limiting plate 12, which is nested and fitted with the connecting shaft 4, is snapped and fitted on the outside of the limiting plate 7. This facilitates good stability and reliability of the oil seal. A PTFE lip 8, which is fitted with the connecting shaft 4, is pasted and fixed to the inner side of the upper end of the sealing lip 5. A first tension spring 10 is snapped and fitted to the inner side of the upper outer end of the sealing lip 5, and a second tension spring 11 is snapped and fitted to the inner side of the lower outer end of the sealing lip 5. This facilitates a tight fit between the sealing lip 5 and the PTFE lip 8 and the connecting shaft 4. Furthermore, the PTFE lip 8 has equally spaced functional grooves 9, which facilitates a self-closing reverse anti-leakage structure, thereby effectively preventing contaminants from entering the oil seal. All the electrical components mentioned above are existing technologies and will not be described in detail here.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art. All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-closing reverse anti-leakage oil seal structure, comprising an upper oil seal seat (1), a lower oil seal seat (2) fitted below the upper oil seal seat (1), and a connecting shaft (4) penetrating the inner side of the middle of the upper oil seal seat (1) and the lower oil seal seat (2); Its features are, Also includes: The upper oil seal seat (1) and the lower oil seal seat (2) are provided with a self-closing reverse anti-leakage oil seal structure for connecting the shaft (4), and an anti-detachment structure is provided above the self-closing reverse anti-leakage oil seal structure.

2. The self-closing reverse leak-proof oil seal structure according to claim 1, characterized in that: The lower oil seal seat (2) is fixedly connected to a centrally symmetrically arranged limiting rod (3) on the upper side of its outer end, and the limiting rod (3) is nested and fitted to the inner side of the upper oil seal seat (1).

3. The self-closing reverse leak-proof oil seal structure according to claim 1, characterized in that: The self-closing reverse anti-leakage oil seal structure includes a sealing lip (5), a skeleton sleeve (6), a limiting plate (7), a PTFE lip (8), a functional groove (9), a first tension spring (10), and a second tension spring (11). The upper oil seal seat (1) is nested with a sealing lip (5) that fits and connects to the lower oil seal seat (2). The outer side of the sealing lip (5) is provided with a skeleton sleeve (6) and a limiting plate (7) that serve as limiting elements. The middle part of the sealing lip (5) is provided with a PTFE lip (8), a functional groove (9), a first tension spring (10), and a second tension spring (11) that serve as sealing elements.

4. The self-closing reverse leak-proof oil seal structure according to claim 3, characterized in that: The inner side of the outer end of the sealing lip (5) is snapped and connected to the skeleton sleeve (6), and the skeleton sleeve (6) is nested and fitted inside the upper oil seal seat (1) and the lower oil seal seat (2). A limiting plate (7) is symmetrically arranged in the center of the skeleton sleeve (6) and is fitted and connected to the upper oil seal seat (1) and the sealing lip (5).

5. The self-closing reverse leak-proof oil seal structure according to claim 3, characterized in that: The PTFE lip (8) is glued and fixedly connected to the inner side of the upper end of the sealing lip (5), and the PTFE lip (8) is fitted to the connecting shaft (4). Functional grooves (9) are opened at equal intervals inside the PTFE lip (8), and the upper and lower ends of the sealing lip (5) are respectively nested and fitted with a first tension spring (10) and a second tension spring (11) that are snapped together.

6. The self-closing reverse leak-proof oil seal structure according to claim 1, characterized in that: The anti-detachment structure includes a limiting plate (12) and a pressure spring (13). The limiting plate (12) is nested and attached to the outside of the connecting shaft (4). The pressure spring (13) is fixedly attached to the limiting plate (12) and is arranged symmetrically in the center. The pressure spring (13) is located on the inner side of the upper end of the oil seal seat (1).

7. The self-closing reverse leak-proof oil seal structure according to claim 6, characterized in that: The limiting plate (12) is located on the inner side of the upper end of the skeleton sleeve (6), and the limiting plate (12) is snapped and attached to the outside of the limiting plate (7).

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