Multi-lip inner wrapping framework sealing structure

Abstract

The utility model belongs to the technical field of axial sealing rubber parts, and discloses a multi-lip inner wrapping framework sealing structure which comprises a sealing part installed in a part and used for sealing, and an outer wrapping part wraps the sealing part. The outer wrapping part is of a multi-lip sealing structure and comprises an outer wrapping framework part, an inner double-lip end and an outer attaching end which are integrally arranged, the outer wrapping framework part wraps the sealing part from the lower portion, the inner double-lip end is formed at the end, facing the inner side, of the outer wrapping framework part, and the outer attaching end is formed at the end, facing the outer side, of the outer wrapping framework part. By means of the three-lip sealing structure with the inner double lips and the outer single lip, sufficient interference magnitude is achieved, the sealing performance is better, the axial occupied size is small, the installation size reserved for a sealed workpiece is smaller, space and materials can be structurally saved, and in the same way, due to the fact that the axial thickness is small, compared with a traditional sealing piece, the sealing performance is better. And raw materials of the rubber part in the production process can be greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial sealing rubber parts, and more specifically, to a multi-lip inner-skeleton sealing structure. Background Technique

[0002] Existing axial sealing rubber parts are usually in the form of skeleton oil seals or O-rings. They are convenient and quick to install and can quickly seal the enclosed space of the box body. The rotary shaft lip seal (commonly called skeleton oil seal in the industry) has the following disadvantages: 1. The axial thickness is generally 15-25 mm, occupying a large axial space; 2. At the same time, due to the irregular shapes of the inner and outer lips, the overall production technology requirements are high, and the die structure for manufacturing is complex; 3. Most are single-sided single-lip designs, and the sealing performance is still lacking. In view of this, we propose a multi-lip inner-skeleton sealing structure. Content of the Utility Model

[0003] 1. Technical Problems to be Solved

[0004] The purpose of the utility model is to provide a multi-lip inner-skeleton sealing structure to solve the problems raised in the above background technique through the multi-lip sealing structure.

[0005] 2. Technical Solution

[0006] A multi-lip inner-skeleton sealing structure includes a sealing member for sealing installed in a part, and an outer wrapping member wrapped around the sealing member;

[0007] The outer wrapping member adopts a multi-lip sealing structure, including an integrally arranged outer-skeleton member, an inner double-lip end, and an outer fitting end. The outer-skeleton member wraps the sealing member from below. One end of the outer-skeleton member facing the inside forms the inner double-lip end, and one end of the outer-skeleton member facing the outside forms the outer fitting end.

[0008] In a preferred embodiment, the sealing member is a component made of cold-rolled carbon steel.

[0009] In a preferred embodiment, the outer wrapping member is a component made of rubber.

[0010] In a preferred embodiment, the inner double-lip end includes a first sealing lip, a second sealing lip, and a limiting protrusion. The positions of the inner double-lip end facing the inside protrude outward in a vertical distribution. The upper protruding position forms the first sealing lip, and the lower protruding position forms the second sealing lip. A limiting protrusion is formed at the upward protruding position on one side of the first sealing lip.

[0011] In a preferred embodiment, the inner double-lip end further includes a first sealing groove and a second sealing groove. A first sealing groove is formed between the first sealing lip and the second sealing lip, and a second sealing groove is formed between the first sealing lip and the limiting protrusion.

[0012] In a preferred embodiment, the outer fitting end is disposed on the outer fitting mounting surface and protrudes outward to form a sealing lip three for sealing.

[0013] 3. Advantageous Effects

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] 1. The present utility model has a three-lip sealing structure with inner double lips and outer single lip, having sufficient interference amount, better sealing performance. Compared with the rotary shaft lip seal structure in the prior art, it occupies a smaller volume axially and requires a smaller installation dimension reserved for the sealed workpiece, so it can save space and materials in terms of structure. Similarly, because of its small axial thickness, the raw materials for the rubber part can be greatly saved during the production process compared with traditional seals.

[0016] 2. The present utility model adopts the form of an outer rubber-coated skeleton. Not only is it very thin, without the protruding structure like a skeleton oil seal, but it can also replace different materials during the production process according to the use of the product in different environments. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the embodiment in the present utility model;

[0018] Figure 2 For the present utility model Figure 1 A cross-sectional view taken along line A-A in it;

[0019] Figure 3 It is a schematic diagram of the structure of the seal and the outer package of Embodiment 1 of the present utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the seal and the outer package of the present utility model from a top view perspective;

[0021] Figure 5 It is a schematic diagram of the structure of the seal and the outer package of the present utility model from a bottom view perspective;

[0022] Figure 6 It is a schematic diagram of the overall structure of the comparative example in the present utility model.

[0023] Explanation of the reference numerals in the figures: 1. Part; 2. Seal; 3. Outer package;

[0024] 31. Outer skeleton part; 32. Inner double-lip end; 33. Outer fitting end;

[0025] 321. Sealing lip one; 322. Sealing lip two; 323. Limiting protrusion; 324. Sealing groove one; 325. Sealing groove two;

[0026] 331. Sealing lip three. Detailed implementation manner

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It 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 cannot be understood as a limitation to the present utility model.

[0028] In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically and clearly defined.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" 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 communication inside 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 according to specific situations.

[0030] Embodiment

[0031] Please refer to Figures 1-5 , the present utility model provides a multi-lip inner package skeleton sealing structure, which includes a sealing member 2 installed in part 1 for sealing. Part 1 is a rotary solar tracking speed reducer, and an outer package member 3 made of rubber is wrapped outside the sealing member 2 made of cold-rolled carbon steel. In this embodiment, the outer package member 3 takes rubber as an example, and different materials can be replaced with rubber according to the actual use environment of the product during the production process. The outer package member 3 adopts a multi-lip sealing structure, which can be a three-lip sealing structure, a four-lip sealing structure, or other multi-lip sealing structures. In this embodiment, the three-lip sealing structure is taken as an example for illustration;

[0032] Please refer to the attached drawings of the specification Figure 3, a specific description of the triple-lip seal structure in this embodiment is given. The triple-lip seal structure includes an integrally provided outer wrapping skeleton member 31, an inner double-lip end 32, and an outer fitting end 33. Its axial thickness is only 2 - 3.5 mm, occupying extremely little space. On the premise of ensuring sealing performance, it is convenient for mold demolding during the manufacturing process. The outer wrapping skeleton member 31 wraps the seal 2 from below. One end of the outer wrapping skeleton member 31 facing the inner side forms the inner double-lip end 32, and the inner side of the inner double-lip end 32 fits the rotating surface of the workpiece. One end of the outer wrapping skeleton member 31 facing the outer side forms the outer fitting end 33, and the outer side fits the installation surface of the workpiece. Since the axial occupied volume is small, the installation dimension reserved for the sealed workpiece is also smaller. Therefore, space and materials can be saved in terms of structure. When using this product, the material on the structural part can be reduced by 80% - 86.6%. Specifically, the material reduction amount = 1 - (axial thickness of this product / thickness of traditional axial seal).

[0033] Continue to refer to the attached drawings of the specification Figure 3 , for a further description of the triple-lip seal structure in this embodiment, the inner double-lip end 32 includes a first sealing lip 321, a second sealing lip 322, and a limiting protrusion 323. The positions of the inner double-lip end 32 facing the inner side protrude outward in a vertically distributed form. The upper protruding position forms the first sealing lip 321, and the lower protruding position forms the second sealing lip 322. The inner double-lip end 32 also includes a first sealing groove 324 and a second sealing groove 325. A first sealing groove 324 is formed between the first sealing lip 321 and the second sealing lip 322, and a second sealing groove 325 is formed between the first sealing lip 321 and the limiting protrusion 323. The outer fitting end 33 is arranged with its outer side fitting the installation surface and protrudes outward on the outer side to form a third sealing lip 331 for sealing. The first sealing lip 321, the second sealing lip 322, and the limiting protrusion 323 form a triple-lip seal structure. Adopting an internal and external multi-lip seal structure, the sealing effect is better, and it is convenient for mold demolding during the manufacturing process;

[0034] Because of the small axial thickness, since the thickness of the triple-lip seal structure is very thin and there is no protruding structure like that of traditional skeleton oil seals, compared with traditional seals, the raw materials for the rubber part can be saved by 40% - 70% during the production process. And because of the inner double-lip and outer single-lip structure, there is sufficient interference amount, and the sealing performance is better.

[0035] Comparative example

[0036] Please refer to the attached drawings of the specification Figure 6 , the present utility model provides a skeleton oil seal. The inner and outer sides of the skeleton oil seal protrude upward to form a sealing structure, and the axial thickness is generally 15 - 25 mm.

[0037] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-lip inner frame sealing structure, characterized in that: It comprises a sealing member (2) installed in a part (1) for sealing, wherein the sealing member (2) is surrounded by an outer member (3); The outer casing (3) adopts a multi-lip sealing structure, comprising an outer casing frame member (31), an inner double-lip end (32) and an outer fitting end (33) which are integrally arranged. The outer casing frame member (31) wraps the sealing member (2) from below, and an end of the outer casing frame member (31) facing inward forms the inner double-lip end (32), and an end of the outer casing frame member (31) facing outward forms the outer fitting end (33).

2. A multi-lip inner frame sealing structure according to claim 1, characterized in that: The sealing component (2) is a component made of cold-rolled carbon steel.

3. The multi-lip inner frame sealing structure according to claim 1, characterized in that: The outer packaging component (3) is a component made of rubber material.

4. The multi-lip inner frame sealing structure according to claim 1, characterized in that: The inner double lip end (32) comprises a sealing lip edge 1 (321), a sealing lip edge 2 (322) and a limiting protrusion (323); the inner double lip end (32) protrudes outwards in an upwardly distributed manner toward the inner side, the upper protruding position forms the sealing lip edge 1 (321), the lower protruding position forms the sealing lip edge 2 (322), and the upwardly protruding position on one side of the sealing lip edge 1 (321) forms the limiting protrusion (323).

5. A multi-lip inner frame sealing structure according to claim 4, characterized in that: The inner double lip end (32) further comprises a sealing groove 1 (324) and a sealing groove 2 (325); the sealing groove 1 (324) is formed between the sealing lip edge 1 (321) and the sealing lip edge 2 (322); and the sealing groove 2 (325) is formed between the sealing lip edge 1 (321) and the limiting protrusion (323).

6. A multi-lip inner frame sealing structure according to claim 5, characterized in that: The outer side of the outer fitting end (33) is fitted with the mounting surface and protrudes outwards on the outer side to form a sealing lip edge three (331) for sealing.

Images