Sealing structure

Abstract

The sealing structure comprises a solid regular-shape sealing ring and a second sealing ring, the second sealing ring is provided with an outer side surface, an inner side surface and a side surface between the inner side surface and the outer side surface, and the inner side surface is provided with a solid regular-shape sealing ring installation groove. An annular protrusion is arranged on the outer side surface and is in sealing fit with the sealing fit face, the side surface and an installation groove of the sealing structure are in anti-disengagement fit, in the free state, the solid regular-shape sealing ring protrudes out of the solid regular-shape sealing ring installation groove, and the solid regular-shape sealing ring is softer than the second sealing ring. The utility model has the advantages that: 1, the sealing structure can be used in both hydraulic pressure and pneumatic pressure; 2, the sealing performance is good under low pressure or high pressure, and the sealing structure cannot be separated from the mounting groove; 3, the friction is low, the starting resistance is small, and the movement is stable; 4, bidirectional sealing; and 5, the installation is convenient.

Description

Technical Field

[0001] The utility model relates to a sealing structure. Background Art

[0002] At present, the sealing structure of the oil cylinder generally adopts a solution of using only an O-ring or a double O-ring, etc. For this sealing solution, if better sealing performance is to be achieved, excessive friction will be generated, which will easily cause the O-ring to fall out of the installation groove, resulting in sealing failure. Utility Model Content

[0003] The purpose of the utility model is to provide a sealing structure that can be applied to an oil cylinder, which can not only improve the sealing performance, but also prevent the O-ring from falling out of the installation groove and avoid sealing failure. To this end, the utility model adopts the following technical solutions:

[0004] A sealing structure, characterized in that it includes a solid regularly shaped sealing ring and a second sealing ring, the second sealing ring is provided with an outer surface, an inner surface and a side surface between the inner surface and the outer surface, the inner surface is provided with a solid regularly shaped sealing ring mounting groove, the outer surface is provided with an annular protrusion to form a sealing fit with the sealing mating surface, the side surface forms an anti-escape fit with the mounting groove of the sealing structure, in a free state, the solid regularly shaped sealing ring protrudes from the solid regularly shaped sealing ring mounting groove, and the solid regularly shaped sealing ring is softer than the second sealing ring.

[0005] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions at the same time, or use these further technical solutions in combination:

[0006] The installation groove of the sealing structure is a groove with a rectangular cross section.

[0007] The main body of the second sealing ring is a rectangle in cross section, the annular protrusion is arranged on its outer contour, the solid regular-shaped sealing ring installation groove is arranged on its inner contour, and the right-angled sides on both sides form an anti-slip fit with the installation groove with a rectangular cross section.

[0008] An annular shallow groove is arranged on the surface of the annular protrusion.

[0009] The sealing structure is a sealing structure of a rotary oil cylinder, and the location where the sealing structure is arranged includes at least one of the following locations:

[0010] (1) It is arranged between the outer wall of the front end of the piston and the inner wall of the front end of the cylinder;

[0011] (2) It is arranged between the outer wall of the piston disc and the inner wall of the rear end of the cylinder body;

[0012] (3) It is arranged between the outer wall at the rear end of the piston and the inner wall at the rear end of the cylinder head.

[0013] The sealing structure is arranged in an annular groove on the inner side of the component or in an annular groove on the outer periphery.

[0014] The cross-section of the solid regular-shaped sealing ring is O-shaped or rectangular.

[0015] The solid regular-shaped sealing ring forms a sealing fit with the groove bottom of the sealing structure installation groove.

[0016] The side surface of the second sealing ring forms a sealing fit with the groove wall of the sealing structure installation groove.

[0017] Due to the adoption of the technical solution of the utility model, the utility model has the following advantages:

[0018] 1. The sealing structure of the utility model can be used in both hydraulic and pneumatic applications; 2. It has good sealing properties under low or high pressure, and the sealing structure will not fall out of the installation groove; 3. It has low friction, small starting resistance, and smooth movement; 4. It has two-way sealing; 5. It is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the implementation structure of the utility model when it is applied to a rotary cylinder.

[0020] Figure 2 It is a schematic diagram of the free state when the utility model is installed on the hole wall.

[0021] Figure 3 It is a schematic diagram of the free state when the utility model is installed on the shaft. DETAILED DESCRIPTION

[0022] Referring to the accompanying drawings. The present invention provides a sealing structure, comprising a solid regular shape sealing ring 1 and a second sealing ring 2, wherein the second sealing ring 2 is provided with an outer surface 21, an inner surface 22 and side surfaces 23 and 24 between the inner surface and the outer surface, wherein the inner surface is provided with a solid regular shape sealing ring installation groove 221, and the outer surface 21 is provided with an annular protrusion 211 to form a sealing fit with the sealing mating surface, wherein the side surfaces 23 and 24 form an anti-slip fit with the installation groove 100 of the sealing structure, in a free state, the solid regular shape sealing ring 1 protrudes from the solid regular shape sealing ring installation groove 221, and the solid regular shape sealing ring 1 is softer than the second sealing ring 2, and during installation, the sealing structure is squeezed between the hole and the shaft mainly by the deformation of the solid regular shape sealing ring 1, and the friction between the M sealing structure and the sealing mating surface is reduced, and when the sealing structure is installed on the shaft, the sealing mating surface may be the hole wall, and when the sealing structure is installed on the hole wall, the sealing mating surface may be the shaft surface. The second sealing ring 2 is larger than the solid regular-shaped sealing ring 1 and will not fall out of the installation groove 100, while the solid regular-shaped sealing ring 1 is hidden between the second sealing ring 2 and the bottom of the installation groove 100 and will not fall out, and the solid regular-shaped sealing ring 1 forms a sealing match with the bottom of the sealing structure installation groove 100. Furthermore, the side surfaces 23 and 24 of the second sealing ring 2 form a sealing match with the groove wall of the sealing structure installation groove 100.

[0023] The material of the solid regular-shaped sealing ring 1 can be: NBR (nitrile rubber), FKM (fluororubber); the material of the second sealing ring 2 can be: PTFE (polytetrafluoroethylene), UPE (ultra-high molecular weight polyethylene).

[0024] like Figure 1 As shown, in this embodiment, the sealing structure is a sealing structure of a rotary cylinder, and the locations where it is set include the following locations:

[0025] (1) It is arranged between the outer wall of the piston front end 101 and the inner wall of the cylinder front end 102. Figure 1 In the figure, this position is labeled A;

[0026] (2) It is arranged between the outer wall of the piston disc body 103 and the inner wall of the rear end 104 of the cylinder body. Figure 1 In the figure, this position is labeled B;

[0027] (3) is arranged between the outer wall of the rear end 105 of the piston and the inner wall of the rear end 106 of the cylinder head. Figure 1 This position is labeled C.

[0028] The installation groove 100 of the sealing structure is preferably a groove with a rectangular cross section. The second sealing ring 2 is preferably a rectangular cross section, with the annular protrusion 211 arranged on its outer contour, and the solid regular shape sealing ring installation groove 221 arranged on its inner contour, and the right angles on both sides of the second sealing ring 2 are anti-slipping fit with the installation groove with a rectangular cross section.

[0029] The surface of the annular protrusion 211 is provided with an annular shallow groove 212 which can play the role of oil storage.

[0030] The cross-sectional shape of the solid regular-shaped sealing ring 1 is O-shaped or rectangular.

[0031] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the protection scope of the present invention.

[0032] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are also used only for the simplicity of description, and do not indicate or imply relative importance.

Claims

1. A sealing structure, characterized in that: It includes a solid regularly shaped sealing ring and a second sealing ring, wherein the second sealing ring is provided with an outer surface, an inner surface and a side surface between the inner surface and the outer surface, wherein the inner surface is provided with a solid regularly shaped sealing ring mounting groove, and the outer surface is provided with an annular protrusion to form a sealing fit with the sealing fitting surface, and the side surface forms an anti-escape fit with the mounting groove of the sealing structure, and in a free state, the solid regularly shaped sealing ring protrudes from the solid regularly shaped sealing ring mounting groove, and the solid regularly shaped sealing ring is softer than the second sealing ring.

2. A sealing structure as claimed in claim 1, characterized in that The installation groove of the sealing structure is a groove with a rectangular cross section.

3. A sealing structure as claimed in claim 2, characterized in that The main body of the second sealing ring is a rectangle in cross section, the annular protrusion is arranged on its outer contour, the solid regular-shaped sealing ring installation groove is arranged on its inner contour, and the right-angled sides on both sides form an anti-slip fit with the installation groove with a rectangular cross section.

4. A sealing structure as claimed in claim 1, characterized in that An annular shallow groove is arranged on the surface of the annular protrusion.

5. A sealing structure as claimed in claim 1, characterized in that The sealing structure is a sealing structure of a rotary oil cylinder, and the location where the sealing structure is arranged includes at least one of the following locations: (1) It is arranged between the outer wall of the front end of the piston and the inner wall of the front end of the cylinder; (2) It is arranged between the outer wall of the piston disc and the inner wall of the rear end of the cylinder body; (3) It is arranged between the outer wall at the rear end of the piston and the inner wall at the rear end of the cylinder head.

6. A sealing structure as claimed in claim 1, characterized in that The sealing structure is arranged in an annular groove on the inner side of the component or in an annular groove on the outer periphery.

7. A sealing structure as claimed in claim 1, characterized in that The cross-section of the solid regular-shaped sealing ring is O-shaped or rectangular.

8. A sealing structure as claimed in claim 1, 2, 3, 4, 5, 6 or 7, characterized in that The solid regular-shaped sealing ring forms a sealing fit with the groove bottom of the sealing structure installation groove.

9. A sealing structure as claimed in claim 8, characterized in that The side surface of the second sealing ring forms a sealing fit with the groove wall of the sealing structure installation groove.

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