Combined oil seal with stable outer diameter structure

Abstract

The utility model relates to the technical field of combined oil seals, and discloses a combined oil seal with a stable outer diameter structure, which comprises an oil seal assembly, the oil seal assembly comprises a mounting outer ring, a lip sealing ring A is fixedly connected to the inner side surface of the mounting outer ring, a spring is fixedly connected to one side of the lip sealing ring A, a supporting steel frame A is fixedly connected to one side of the lip sealing ring A, and a supporting steel frame B is fixedly connected to the other side of the lip sealing ring A; the supporting steel frame A is arranged in the mounting outer ring, the protective sleeve is arranged on the surface of the outer side of the mounting outer ring, the supporting steel frame B is arranged in the mounting outer ring, one end of the supporting steel frame B is fixedly connected with the lip sealing ring B, and the mounting inner ring is fixedly connected to the surface of the outer side of the lip sealing ring B. Through the arrangement of the oil seal assembly, the oil seal assembly can seal the oil seal. The protective sleeve is of a rubber half-wrapping design, the sealing performance of the protective sleeve is guaranteed, the better stable and accurate assembling characteristic is achieved, the combined part oil seal can effectively block impurities in sealing media, and therefore the service life of the oil seal is prolonged while the effect of protecting the main lip opening is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of combined oil seals, in particular to a combined oil seal with a stable outer diameter structure. Background Art

[0002] An oil seal is the customary name for a general seal. Simply put, it is 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 generally refers to any liquid substance). It isolates the parts that need lubrication in the transmission components from the output components, so as to prevent the leakage of lubricating oil. Seals used for static and dynamic seals (generally reciprocating motion) are called oil seals.

[0003] Chinese patent document CN214248295U discloses a combined PTFE skeleton oil seal, which includes an outer skeleton, an inner skeleton and a sealing lip; the cross-sections of the outer skeleton and the inner skeleton are both L-shaped structures; the sealing lip includes a fixed end and a free end, the fixed end is linear, and the free end is arc-shaped; the end of the fixed end of the sealing lip is attached to the inner ring surface of the outer skeleton, and the radial end of the inner skeleton is attached to the fixed end of the sealing lip; a rubber gasket is arranged between the fixed end of the sealing lip and the radial end of the outer skeleton. The combined PTFE skeleton oil seal provided by the utility model has enhanced rigidity with the inner and outer combined skeletons, so that the oil seal will not easily deform. The inner skeleton can also block part of the pressure of the sealing medium on the oil seal, thereby reducing the deformation degree of the sealing lip. However, this combined oil seal does not have precise assembly characteristics and cannot effectively block impurities in the sealing medium, which not only causes certain damage to the main lip but also affects the service life of the oil seal. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems that the existing combined oil seals do not have precise assembly characteristics and cannot effectively block impurities in the sealing medium, which not only cause certain damage to the main lip but also affect the service life of the oil seal, and to propose a combined oil seal with a stable outer diameter structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a combined oil seal with a stable outer diameter structure, including an oil seal assembly, the oil seal assembly includes an installation outer ring, a lip seal ring A is fixedly connected to the inner surface of the installation outer ring, a spring is fixedly connected to one side of the lip seal ring A, the spring is arranged inside the installation outer ring, a support steel frame A is fixedly connected to one side of the lip seal ring A, the support steel frame A is arranged inside the installation outer ring, a protective sleeve is arranged on the outer surface of the installation outer ring, a support steel frame B is arranged inside the installation outer ring, one end of the support steel frame B is fixedly connected to a lip seal ring B, and an installation inner ring is fixedly connected to the outer surface of the lip seal ring B.

[0006] Preferably, both the lip seal ring A and the lip seal ring B are dynamic sealing surfaces, and both the lip seal ring A and the lip seal ring B are components made of rubber;

[0007] It is used not only to have elastic properties but also to have a quite good sealing effect on the shaft.

[0008] Preferably, two groups of springs are provided, and the springs are components made of carbon steel;

[0009] It is used to provide a certain binding force to the lip of the oil seal while also extending the service life of the oil seal.

[0010] Preferably, a protrusion is provided on the support steel frame A;

[0011] It is used to increase the contact area between the support steel frame A and the installation outer ring and increase the connectivity between the support steel frame A and the installation outer ring.

[0012] Preferably, the support steel frame B is designed in an L shape;

[0013] It is used to increase the stability and precise assembly characteristics of the support steel frame B.

[0014] Preferably, a spring groove is provided on the installation inner ring, and an installation groove is provided on the upper surface of the installation inner ring;

[0015] It is used to prevent the spring from shifting during operation while facilitating the installation of the installation inner ring to a specified position.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. A combined oil seal with a stable outer diameter structure proposed by the utility model, by setting an oil seal assembly, the protective sleeve is a semi-rubber design, ensuring that the sealing performance of the protective sleeve has better stability and precise assembly characteristics. At the same time, a lip seal ring A and a lip seal ring B are installed on the combined oil seal, so that the main lip is wrapped, avoiding direct contact between impurities in the sealing medium and the main lip and causing wear, thereby playing a role in protecting the main lip and extending the service life of the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a combined oil seal with a stable outer diameter structure proposed by the utility model;

[0019] Figure 2 It is a top view schematic diagram of a combined oil seal with a stable outer diameter structure proposed by the utility model;

[0020] Figure 3 It is a cross-sectional view schematic diagram of a combined oil seal with a stable outer diameter structure proposed by the utility model;

[0021] Figure 4 A cross-sectional view of the installation outer ring of a combined oil seal with a stable outer diameter structure proposed by the present utility model;

[0022] Legend:

[0023] 1. Oil seal assembly; 11. Installation outer ring; 12. Lip seal ring A; 13. Spring; 14. Support steel frame A; 141. Protrusion; 15. Protective sleeve; 16. Support steel frame B; 17. Lip seal; 18. Installation inner ring; 181. Spring groove; 182. Installation groove. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in specific situations.

[0026] Refer to Figures 1-4, An embodiment provided by the present utility model: A combined oil seal with a stable outer diameter structure, including an oil seal assembly 1. The oil seal assembly 1 includes an installation outer ring 11. A lip seal ring A 12 is fixedly connected to the inner surface of the installation outer ring 11 to increase the sealing performance between the lip seal ring A 12 and the shaft. A spring 13 is fixedly connected to one side of the lip seal ring A 12, providing a certain binding force while extending the service life of the oil seal. The spring 13 is arranged inside the installation outer ring 11. A support steel frame A 14 is fixedly connected to one side of the lip seal ring A 12 to increase the stability and precise assembly characteristics of the entire device. The support steel frame A 14 is arranged inside the installation outer ring 11. A protective sleeve 15 is arranged on the outer surface of the installation outer ring 11. A support steel frame B 16 is arranged inside the installation outer ring 11 to increase the rigidity so that the oil seal will not deform easily. One end of the support steel frame B 16 is fixedly connected to a lip seal ring B 17. An installation inner ring 18 is fixedly connected to the outer surface of the lip seal ring B 17.

[0027] Both the lip seal ring A 12 and the lip seal ring B 17 are dynamic sealing surfaces, and both the lip seal ring A 12 and the lip seal ring B 17 are components made of rubber. While making the lip seal ring A 12 and the lip seal ring B 17 have a certain elasticity, it increases the sealing performance between them and the shaft. There are two groups of springs 13, and the springs 13 are components made of carbon steel. While providing a certain binding force to the oil seal, it increases the service life of the oil seal. There are protrusions 141 on the support steel frame A 14 to increase the contact area between the support steel frame A 14 and the installation outer ring 11. The support steel frame B 16 is designed in an L shape to increase the rigidity of the support steel frame B 16 so that the oil seal will not deform easily. A spring groove 181 is opened on the installation inner ring 18 to prevent the oil seal from shifting during operation, thereby affecting the overall sealing effect of the oil seal. And an installation groove 182 is opened on the upper surface of the installation inner ring 18 to facilitate the installation of the oil seal.

[0028] Working principle: First, install the oil seal assembly 1 in a suitable position. Then, wrap the main lip through the installation groove 182 opened on the installation inner ring 18 to block the impurities in the sealing medium from wearing the main lip. At the same time, the support steel frame A 14 and the support steel frame B 16 increase the overall rigidity of the oil seal device, making it not easy to deform during operation. Under the action of the spring 13, it provides a part of the binding force to strengthen the sealing performance between the oil seal assembly 1 and the docking lip, thereby extending the service life of the oil seal assembly 1.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A combined oil seal with a stable outer diameter structure, comprising an oil seal assembly (1), characterized in that: The oil seal assembly (1) comprises an installation outer ring (11), the inner surface of the installation outer ring (11) is fixedly connected to a lip seal ring A (12), one side of the lip seal ring A (12) is fixedly connected to a spring (13), the spring (13) is arranged inside the installation outer ring (11), one side of the lip seal ring A (12) is fixedly connected to a support steel frame A (14), the support steel frame A (14) is arranged inside the installation outer ring (11), a protective sleeve (15) is arranged on the outer surface of the installation outer ring (11), a support steel frame B (16) is arranged inside the installation outer ring (11), one end of the support steel frame B (16) is fixedly connected to a lip seal ring B (17), and the outer surface of the lip seal ring B (17) is fixedly connected to an installation inner ring (18).

2. A combined oil seal with a stable outer diameter structure according to claim 1, characterized in that: The lip seal ring A (12) and the lip seal ring B (17) are both dynamic sealing surfaces, and the lip seal ring A (12) and the lip seal ring B (17) are both components made of rubber.

3. The combined oil seal with a stable outer diameter structure according to claim 1, characterized in that: The spring (13) is provided in two groups, and the spring (13) is a component made of carbon steel.

4. The combined oil seal with a stable outer diameter structure according to claim 1, characterized in that: The supporting steel frame A (14) is provided with a protrusion (141).

5. The combined oil seal with a stable outer diameter structure according to claim 1, characterized in that: The supporting steel frame B (16) is designed to be L-shaped.

6. The combined oil seal with a stable outer diameter structure according to claim 1, characterized in that: The installation inner ring (18) is provided with a spring groove (181), and the upper surface of the installation inner ring (18) is provided with an installation groove (182).

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