Composite oil seal

Abstract

The utility model discloses a composite oil seal, which relates to the field of oil seals, and comprises a protective iron shell arranged on the outer side of an oil seal body, the protective iron shell is clamped with the top of the oil seal body through a clamping piece, a hollow cavity is formed in the oil seal body, and a framework is arranged in the hollow cavity; spring grooves are formed in the two sides of the oil seal body, springs are arranged in the spring grooves, a waist part is arranged on one side of the oil seal body, a sealing lip and a dustproof lip are arranged at the top end and the bottom end of the waist part respectively, and a limiting inner ring and a limiting outer ring which are matched with the protective iron shell are sequentially arranged at the two ends of the outer side of the oil seal body from inside to outside; a plurality of limiting holes matched with the clamping pieces are evenly formed between the limiting inner ring and the limiting outer ring, and fillets are arranged at the ends of the limiting holes. The wear resistance of the oil seal in a severe environment is improved, so that the service lives of the oil seal and equipment are prolonged; and the difficulty in the assembly and maintenance process is also reduced.

Description

Technical Field

[0001] The utility model relates to the field of oil seals, and more specifically, to a composite oil seal. Background Technique

[0002] An oil seal, also known as a sealing ring or grease seal, is a sealing device used in mechanical equipment to prevent the leakage of lubricating oil or grease and to prevent the entry of external dirt, dust, etc. Generally, an oil seal consists of a metal skeleton on the periphery and a rubber material inside.

[0003] In the mechanical field, sometimes it is necessary to design an oil seal product, with one side for sealing oil and the other side for sealing sediment and water. To achieve this effect, the following methods are usually adopted in actual assembly:

[0004] 1) Conventional oil seal installation in reverse: By installing the conventional oil seal in reverse, the function of sealing oil on one side and sealing sediment on the other side can be achieved. However, this assembly method will increase the design space and assembly difficulty of the machine. In addition, the oil seal on the side of sealing sediment has a short service life in a harsh environment, which easily increases the risk of machine failure.

[0005] 2) Application of iron shell oil seal: In a relatively good working environment, the iron shell oil seal can usually meet the usage requirements of customers. However, in a relatively harsh working condition and with low equipment precision, the secondary lip of the iron shell oil seal has poor followability due to the absence of a spring. When the equipment has shaft movement or the machine vibrates, the secondary lip is difficult to fit tightly, which easily allows sediment to enter the equipment interior, thus reducing the sealing effect.

[0006] Regarding the problems in the related technology, no effective solution has been proposed yet. Content of the Utility Model

[0007] Regarding the problems in the related technology, the utility model proposes a composite oil seal to overcome the above-mentioned technical problems existing in the existing related technology.

[0008] For this reason, the specific technical solution adopted by the utility model is as follows:

[0009] A composite oil seal includes an oil seal body. A protective iron shell is arranged on the outer side of the oil seal body. The protective iron shell and the top of the oil seal body are clamped through a clamping member. A hollow cavity is arranged inside the oil seal body, and a skeleton is arranged inside the hollow cavity. Spring grooves are arranged on both sides of the oil seal body, and springs are arranged inside the spring grooves. A waist is arranged on one side of the oil seal body, and a sealing lip and a dust-proof lip are respectively arranged at the top and bottom of the waist. Limiting inner rings and limiting outer rings that cooperate with the protective iron shell are sequentially arranged from inside to outside at both ends of the outer side of the oil seal body. A number of limiting holes that cooperate with the clamping member are evenly arranged between the limiting inner ring and the limiting outer ring, and rounded corners are arranged at the ends of the limiting holes.

[0010] Furthermore, in order to enhance the anti-wear property of the oil seal under the protection of the multi-level protection structure in harsh environments, thereby extending the service life of the oil seal and the equipment, limiting grooves that cooperate with the inner limiting ring and the outer limiting ring are sequentially arranged at both inner ends of the protective iron shell from the inside to the outside; an installation groove that cooperates with the clamping member is provided in the middle of the protective iron shell, and an annular hole that cooperates with the clamping member is provided in the middle of the installation groove.

[0011] Furthermore, in order to ensure not only the stable installation of the oil seal body and the protective iron shell under the action of the clamping member, but also reduce the difficulty for customers during assembly and maintenance, making the product easier to use, the clamping member includes an installation ring provided at the top end of the installation groove. An annular convex block that cooperates with the annular hole is provided at the bottom end of the installation ring. A number of limiting blocks that cooperate with the limiting holes are evenly provided at the bottom end of the annular convex block, and an arc-shaped clamping block is provided at the bottom end of the limiting block.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. Through the design of the skeleton and spring inside the oil seal body of the present utility model, the sealing performance is greatly enhanced. Especially during the dynamic operation of the equipment, it can effectively avoid oil leakage and improve the stability of the sealing performance; the addition of the protective iron shell provides additional external protection, which can effectively prevent sediment, dust, etc. from entering the inside of the oil seal and further ensure the normal operation of the equipment.

[0014] 2. The multi-level protection structure not only improves the sealing performance, but also increases the anti-wear property of the oil seal in harsh environments, thereby extending the service life of the oil seal and the equipment; under the action of the clamping member, it not only ensures the stable installation of the oil seal body and the protective iron shell, but also reduces the difficulty for customers during assembly and maintenance, making the product easier to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic structural diagram of a composite oil seal according to an embodiment of the present utility model;

[0017] Figure 2 is a cross-sectional view of a composite oil seal according to an embodiment of the present utility model;

[0018] Figure 3 is Figure 2 a partial enlarged view of part A in

[0019] Figure 4 is a three-dimensional cross-sectional view of a composite oil seal according to an embodiment of the present invention;

[0020] Figure 5 is Figure 4 a partial enlarged view of part B in

[0021] In the figure:

[0022] 1. Oil seal body; 2. Protective iron shell; 3. Clamping part; 301. Installation ring; 302. Annular convex block; 303. Limiting block; 304. Arc clamping block; 4. Skeleton; 5. Spring groove; 6. Spring; 7. Waist; 8. Sealing lip; 9. Dust-proof lip; 10. Limiting inner ring; 11. Limiting outer ring; 12. Limiting hole; 13. Rounded corner; 14. Limiting card slot; 15. Installation groove; 16. Annular hole. Specific embodiments

[0023] To further illustrate the embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0024] According to an embodiment of the present invention, a composite oil seal is provided.

[0025] Now, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments. As Figures 1-5 shown, the composite oil seal according to an embodiment of the present invention includes an oil seal body 1. A protective iron shell 2 is arranged outside the oil seal body 1. The protective iron shell 2 is clamped with the top of the oil seal body 1 through a clamping part 3. A hollow cavity is opened inside the oil seal body 1, and a skeleton 4 is arranged inside the hollow cavity; Spring grooves 5 are opened on both sides of the oil seal body 1, and springs 6 are arranged inside the spring grooves 5. A waist 7 is opened on one side of the oil seal body 1, and a sealing lip 8 and a dust-proof lip 9 are respectively arranged at the top and bottom of the waist 7. Limiting inner rings 10 and limiting outer rings 11 that cooperate with the protective iron shell 2 are sequentially arranged from the inside to the outside at both ends of the outer side of the oil seal body 1; A plurality of limiting holes 12 that cooperate with the clamping part 3 are evenly opened between the limiting inner ring 10 and the limiting outer ring 11. Rounded corners 13 are arranged at the ends of the limiting holes 12. Limiting card slots 14 that cooperate with the limiting inner ring 10 and the limiting outer ring 11 are sequentially arranged from the inside to the outside at both ends of the inner side of the protective iron shell 2; An installation groove 15 that cooperates with the clamping part 3 is opened in the middle of the protective iron shell 2, and an annular hole 16 that cooperates with the clamping part 3 is opened in the middle of the installation groove 15.

[0026] With the above technical solution, the utility model greatly enhances the sealing performance through the design of the skeleton 4 and the spring 6 inside the oil seal body 1. Especially in the case of the dynamic operation of the equipment, it can effectively avoid oil leakage and improve the stability of the sealing performance. The addition of the protective iron shell 2 provides additional external protection, which can effectively prevent sediment, dust, etc. from entering the inside of the oil seal, further ensuring the normal operation of the equipment. The multi-level protection structure not only improves the sealing performance but also increases the abrasion resistance of the oil seal in harsh environments, thereby extending the service life of the oil seal and the equipment. Under the action of the clamping member 3, it not only ensures the stable installation of the oil seal body 1 and the protective iron shell 2 but also reduces the difficulty for customers in the assembly and maintenance processes, making the product easier to use.

[0027] In one embodiment, for the above clamping member 3, the clamping member 3 includes an installation ring 301 provided at the top end of the installation groove 15. A ring-shaped convex block 302 that cooperates with the annular hole 16 is provided at the bottom end of the installation ring 301. A plurality of limiting blocks 303 that cooperate with the limiting holes 12 are evenly provided at the bottom end of the ring-shaped convex block 302. An arc-shaped clamping block 304 is provided at the bottom end of the limiting block 303. The arc-shaped clamping block 304 is made of flexible rubber material. Thus, under the action of the clamping member 3, it not only ensures the stable installation of the oil seal body 1 and the protective iron shell 2 but also reduces the difficulty for customers in the assembly and maintenance processes, making the product easier to use.

[0028] The working principle of the clamping member 3 is as follows:

[0029] First, the operator aligns the arc-shaped clamping block 304 with the rounded corner 13 of the limiting hole 12 and squeezes the arc-shaped clamping block 304 made of flexible rubber material, so that the arc-shaped clamping block 304 passes through the limiting hole 12 and is clamped in the rounded corner 13. Then, the installation ring 301 is pressed to make the installation ring 301 fit on the surface of the installation groove 15. At the same time, the ring-shaped convex block 302 is aligned with the annular hole 16, and the clamping of the protective iron shell 2 and the oil seal body 1 is completed.

[0030] To facilitate the understanding of the above technical solution of the utility model, the working principle or operation method of the utility model in the actual process will be described in detail below.

[0031] In actual application, through the cooperation of the skeleton 4 and the spring 6 inside the oil seal body 1, the sealing performance is improved during the dynamic operation of the equipment, effectively preventing oil leakage. The protective iron shell 2 and the oil seal body 1 are firmly clamped through the clamping member 3 to achieve stable installation. At the same time, the protective iron shell provides external protection for the oil seal to prevent sediment and dust from entering the inside of the oil seal, ensuring the normal operation of the equipment. With the cooperation of the connecting member and the limiting hole 12, the arc-shaped clamping block 304 passes through the limiting hole 12 and is clamped in the rounded corner 13, realizing flexible connection and stable fixation, making the assembly of the entire oil seal more convenient and the maintenance easier, and improving the overall sealing performance and service life of the oil seal.

[0032] The working principle of the snap-in part 3 is as shown above.

[0033] To sum up, by means of the above technical solution of the present utility model, through the design of the skeleton 4 and the spring 6 inside the oil seal body 1, the sealing performance is greatly enhanced. Especially under the condition of the dynamic operation of the equipment, it can effectively avoid oil leakage and improve the stability of the sealing performance; the addition of the protective iron shell 2 provides additional external protection, which can effectively prevent sand, dust, etc. from entering the inside of the oil seal, further ensuring the normal operation of the equipment; the multi-level protection structure not only improves the sealing performance, but also increases the abrasion resistance of the oil seal in harsh environments, thereby extending the service life of the oil seal and the equipment; under the action of the snap-in part 3, it not only ensures the stable installation of the oil seal body 1 and the protective iron shell 2, but also reduces the difficulty for customers in the assembly and maintenance process, making the product easier to use.

[0034] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. 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 composite oil seal, comprising an oil seal body (1), characterized in that, A protective iron shell (2) is provided on the outer side of the oil seal body (1). The protective iron shell (2) is clamped with the top of the oil seal body (1) through a clamping member (3). A hollow cavity is formed inside the oil seal body (1), and a skeleton (4) is arranged inside the hollow cavity; Spring grooves (5) are formed on both sides of the oil seal body (1), and springs (6) are arranged inside the spring grooves (5).

2. The composite oil seal according to claim 1, wherein A waist portion (7) is formed on one side of the oil seal body (1), and a sealing lip (8) and a dust-proof lip (9) are respectively arranged at the top end and the bottom end of the waist portion (7).

3. A composite oil seal according to claim 1, characterized in that, Limiting inner rings (10) and limiting outer rings (11) which are matched with the protective iron shell (2) are sequentially arranged from the inside to the outside at both ends of the outer side of the oil seal body (1); A number of limiting holes (12) which are matched with the clamping member (3) are evenly formed between the limiting inner ring (10) and the limiting outer ring (11).

4. The composite oil seal according to claim 3, characterized in that, Rounded corners (13) are arranged at the ends of the limiting holes (12).

5. The composite oil seal according to claim 4, wherein Limiting clamping grooves (14) which are matched with the limiting inner ring (10) and the limiting outer ring (11) are sequentially arranged from the inside to the outside at both ends of the inner side of the protective iron shell (2); An installation groove (15) which is matched with the clamping member (3) is formed in the middle of the protective iron shell (2), and an annular hole (16) which is matched with the clamping member (3) is formed in the middle of the installation groove (15).

6. The composite oil seal according to claim 5, wherein, The clamping member (3) includes an installation ring (301) arranged at the top end of the installation groove (15). An annular convex block (302) which is matched with the annular hole (16) is arranged at the bottom end of the installation ring (301). A number of limiting blocks (303) which are matched with the limiting holes (12) are evenly arranged at the bottom end of the annular convex block (302). An arc-shaped clamping block (304) is arranged at the bottom end of the limiting block (303).

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