Piston rod sealing structural member

Abstract

The utility model relates to a piston rod sealing structural member which is characterized in that one side of a sealing member body sequentially comprises an upper sealing lip body and a lower sealing lip body from top to bottom, and a V-shaped groove is formed in the inner side between the upper sealing lip body and the lower sealing lip body; the top and the bottom of the side, away from the upper sealing lip body and the lower sealing lip body, of the sealing piece body are each provided with a first sliding notch, and the side, away from the sealing piece body, of the upper sealing lip body and the side, away from the sealing piece body, of the lower sealing lip body are each provided with a second sliding notch. And a pressure-bearing structure is arranged in the V-shaped groove between the upper sealing lip body and the lower sealing lip body. Due to the fact that the pressure bearing structure is arranged in the V-shaped groove between the upper sealing lip body and the lower sealing lip body and comprises the upper lip body pressure bearing protruding block and the lower lip body pressure bearing protruding block, on one hand, the upper lip body and the lower lip body can be subjected to pressure bearing treatment, and on the other hand, the risk that an O-shaped ring falls off does not need to be worried about.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rod sealing, in particular to a piston rod sealing structure part. Background Technique

[0002] Construction machinery oil cylinders and filling machinery hydraulic cylinders work in harsh working conditions for a long time. Therefore, a dust ring is arranged outside the hydraulic cylinder to prevent foreign impurities, ash layers, moisture, etc. from entering the system and damaging the hydraulic cylinder and the sealing system. A piston rod seal is also required to play a main sealing role.

[0003] After a large amount of retrieval, it is found that the Chinese patent publication number is CN221075229U, which discloses a wear-resistant seal for a single-acting piston rod, including a seal body. The inner side of the seal body successively includes an upper seal lip and a lower seal lip from top to bottom. A V-shaped groove is arranged on the inner side between the upper seal lip and the lower seal lip; an arc-shaped groove is arranged on the inner side of the V-shaped groove, and an O-ring is installed in the arc-shaped groove. Blocks are arranged at the top and bottom of the V-shaped groove outside the O-ring; convex joints are arranged at the top of the upper seal lip and at the bottom of the lower seal lip, and a convex structure is arranged on the convex joints. In the utility model, an O-ring is installed in the V-shaped groove, thereby reducing the probability of failure of the upper seal lip and the lower seal lip of the seal, and the O-ring can be effectively prevented from falling off by the blocks.

[0004] To sum up, in the existing piston rod seals, the first lip and the second lip may fail during long-term use. A common existing method is to place an O-ring between the first lip and the second lip. However, in order to prevent the O-ring from falling off, an anti-falling-off mechanism needs to be arranged outside the O-ring. However, since the anti-falling-off mechanism is designed outside the dynamic mating surface, there is still a risk of wear during long-term use.

[0005] In view of the above defects, the designer actively conducts research and innovation in order to create a piston rod sealing structure part, making it more valuable in industry. Content of the Utility Model

[0006] In order to solve any one of the above technical problems, the purpose of the utility model is to provide a piston rod sealing structure part.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A piston rod sealing structure part includes a seal body. One side of the seal body successively includes an upper seal lip and a lower seal lip from top to bottom. A V-shaped groove is arranged on the inner side between the upper seal lip and the lower seal lip;

[0009] On both the top and bottom of the side of the seal body away from the upper sealing lip and the lower sealing lip, first sliding notches are provided, and on the side of the upper sealing lip and the lower sealing lip away from the seal body, second sliding notches are provided;

[0010] An arc-shaped groove is provided inside the V-shaped groove;

[0011] A pressure-bearing structure is provided in the V-shaped groove between the upper sealing lip and the lower sealing lip.

[0012] As a further improvement of the present invention, the pressure-bearing structure successively includes an upper lip pressure-bearing convex block and a lower lip pressure-bearing convex block from top to bottom. The upper lip pressure-bearing convex block is located in the V-shaped groove inside the bottom of the upper sealing lip, and the lower lip pressure-bearing convex block is located in the V-shaped groove inside the top of the lower sealing lip.

[0013] As a further improvement of the present invention, an upward-facing upper pressure-bearing protrusion is provided at the bottom of the upper lip pressure-bearing convex block, and a downward-facing lower pressure-bearing protrusion is provided at the top of the lower lip pressure-bearing convex block.

[0014] As a further improvement of the present invention, an upward-facing upper pressure-bearing protrusion is provided at the bottom of the upper lip pressure-bearing convex block, and a downward-facing lower pressure-bearing depression is provided at the top of the lower lip pressure-bearing convex block.

[0015] As a further improvement of the present invention, an upward-facing upper pressure-bearing depression is provided at the bottom of the upper lip pressure-bearing convex block, and an upward-facing lower pressure-bearing protrusion is provided at the top of the lower lip pressure-bearing convex block.

[0016] As a further improvement of the present invention, a raised contact end is provided at the top of the seal body.

[0017] As a further improvement of the present invention, the raised contact end is composed of a plurality of serrated raised structures.

[0018] As a further improvement of the present invention, the raised contact end is composed of a plurality of arc-shaped raised structures.

[0019] By means of the above solution, the present invention has at least the following advantages:

[0020] In the present invention, through the pressure-bearing structure provided in the V-shaped groove between the upper sealing lip and the lower sealing lip, and the structural arrangement of the upper lip pressure-bearing convex block and the lower lip pressure-bearing convex block in the pressure-bearing structure, on the one hand, the upper and lower lips can be subjected to pressure-bearing treatment, and on the other hand, there is no need to worry about the risk of the O-ring falling off;

[0021] In the present invention, through the first sliding notch on the seal body, it has good pump back-suction performance, and through the second sliding notch on the lip and the interference fit with the seal cavity, it has good static sealing performance.

[0022] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model and implement it according to the content of the description, the following will describe in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of the first embodiment of the present utility model;

[0025] Figure 2 is a schematic structural diagram of the second embodiment of the present utility model;

[0026] Figure 3 is a schematic structural diagram of the third embodiment of the present utility model.

[0027] Among them, the meanings of the reference numerals in the drawings are as follows.

[0028] Seal body 1, upper seal lip 2, lower seal lip 3, first sliding notch 4, V-shaped groove 5, arc groove 6, second sliding notch 7, upper lip pressure-bearing convex block 8, lower lip pressure-bearing convex block 9, convex contact end 10. Detailed Description of the Embodiments

[0029] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model but not to limit the scope of the present utility model.

[0030] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the 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 of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0031] Embodiment

[0032] As Figures 1 to 3 shown

[0033] A piston rod sealing structure member includes a sealing member body 1. One side of the sealing member body 1 includes an upper sealing lip 2 and a lower sealing lip 3 in sequence from top to bottom. An inner V-shaped groove 5 is arranged between the upper sealing lip 2 and the lower sealing lip 3, and an arc-shaped groove 6 is arranged inside the V-shaped groove 5. Through the structural settings of the V-shaped groove 5 and the arc-shaped groove 6, it is convenient for relative displacement to occur between the two lips.

[0034] At the top and bottom of the side of the sealing member body 1 far from the upper sealing lip 2 and the lower sealing lip 3, first sliding notches 4 are arranged, which have better pump back suction performance. On the side of the upper sealing lip 2 and the lower sealing lip 3 far from the sealing member body 1, second sliding notches 7 are arranged, and the second sliding notches are in interference fit with the sealing cavity, which has better static sealing performance.

[0035] A pressure-bearing structure is arranged in the V-shaped groove 5 between the upper sealing lip 2 and the lower sealing lip 3. The pressure-bearing structure includes an upper lip pressure-bearing convex block 8 and a lower lip pressure-bearing convex block 9 in sequence from top to bottom. The upper lip pressure-bearing convex block 8 is located in the V-shaped groove 5 on the inner side of the bottom of the upper sealing lip 2, and the lower lip pressure-bearing convex block 9 is located in the V-shaped groove 5 on the inner side of the top of the lower sealing lip 3.

[0036] 1. At the bottom of the upper lip pressure-bearing convex block 8, an upper pressure-bearing convex part facing downward is arranged, and at the top of the lower lip pressure-bearing convex block 9, a lower pressure-bearing convex part facing upward is arranged.

[0037] 2. At the bottom of the upper lip pressure-bearing convex block 8, an upper pressure-bearing convex part facing downward is arranged, and at the top of the lower lip pressure-bearing convex block 9, a lower pressure-bearing concave part facing downward is arranged.

[0038] 3. At the bottom of the upper lip pressure-bearing convex block 8, an upper pressure-bearing concave part facing upward is arranged, and at the top of the lower lip pressure-bearing convex block 9, a lower pressure-bearing convex part facing upward is arranged.

[0039] A convex contact end 10 is arranged at the top of the sealing member body 1, and the rest of the sealing member body 1 is a smooth surface structure.

[0040] 1. The convex contact end 10 is composed of a plurality of serrated convex structures.

[0041] 2. The convex contact end 10 is composed of a plurality of arc-shaped convex structures.

[0042] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0043] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium; it may 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 through specific circumstances.

[0044] The above description is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A piston rod sealing structure, comprising a sealing body (1), one side of the sealing body (1) comprising an upper sealing lip body (2) and a lower sealing lip body (3) in order from top to bottom, and a V-shaped groove (5) is provided on the inner side between the upper sealing lip body (2) and the lower sealing lip body (3); Features: A first sliding notch (4) is provided at the top and bottom of the sealing body (1) on a side away from the upper sealing lip body (2) and the lower sealing lip body (3), and a second sliding notch (7) is provided on the upper sealing lip body (2) and the lower sealing lip body (3) on a side away from the sealing body (1); An arc groove (6) is provided on the inner side of the V-shaped groove (5); A pressure-bearing structure is provided in the V-shaped groove (5) between the upper sealing lip body (2) and the lower sealing lip body (3).

2. A piston rod sealing structural component according to claim 1, characterized in that: The pressure-bearing structure comprises, from top to bottom, an upper lip pressure-bearing protrusion (8) and a lower lip pressure-bearing protrusion (9), wherein the upper lip pressure-bearing protrusion (8) is located in a V-shaped groove (5) on the inner side of the bottom of the upper sealing lip (2), and the lower lip pressure-bearing protrusion (9) is located in a V-shaped groove (5) on the inner side of the top of the lower sealing lip (3).

3. A piston rod sealing structural component according to claim 2, characterized in that: An upper pressure-bearing protrusion facing downward is arranged at the bottom of the upper lip pressure-bearing protrusion (8), and a lower pressure-bearing protrusion facing upward is arranged at the top of the lower lip pressure-bearing protrusion (9).

4. A piston rod sealing structural component according to claim 2, characterized in that: An upper pressure-bearing protrusion facing downward is arranged at the bottom of the upper lip pressure-bearing protrusion (8), and a lower pressure-bearing concave portion facing downward is arranged at the top of the lower lip pressure-bearing protrusion (9).

5. A piston rod sealing structural component according to claim 2, characterized in that: An upper pressure-bearing recessed portion facing upward is arranged at the bottom of the upper lip pressure-bearing protrusion (8), and a lower pressure-bearing protrusion facing upward is arranged at the top of the lower lip pressure-bearing protrusion (9).

6. A piston rod sealing structural component according to claim 1, characterized in that: A raised contact end (10) is provided on the top of the seal body (1).

7. A piston rod sealing structural component according to claim 6, characterized in that: The raised contact end (10) is composed of a plurality of sawtooth raised structures.

8. A piston rod sealing structural component according to claim 6, characterized in that: The raised contact end (10) is composed of a plurality of arc-shaped raised structures.

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