Sealing structure and workpiece

Abstract

The utility model relates to the technical field of sealing of parts, and discloses a sealing structure and a workpiece, the sealing structure is applied to a first workpiece and a second workpiece which are matched in a sealing mode, the sealing structure specifically comprises a sealing groove suitable for being formed in the matching face of the first workpiece and the second workpiece, and the sealing groove is provided with a groove top close to a groove opening and a groove bottom far away from the groove opening; the setting size of the groove top is smaller than that of the groove bottom; and the sealing piece comprises an inner side and an outer side, the inner side of the sealing piece is embedded in the sealing groove, the setting size of the inner side is larger than that of the groove top, and at least part of the structure of the outer side is located outside the sealing groove. According to the sealing structure and the workpiece, the sealing piece can be prevented from being separated from the sealing groove, and the sealing effect and the service life of the sealing piece can be guaranteed conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing parts and components, in particular to a sealing structure and a workpiece. Background Art

[0002] In the existing sealing structure, a sealing member with a rectangular or O-shaped cross section is usually used, which is installed in a rectangular groove of a first workpiece to achieve sealing between the first workpiece and the second workpiece. However, when the first workpiece and the second workpiece frequently move axially or need to be frequently disassembled, the sealing member is easily displaced or even falls off from the first workpiece, which not only seriously affects the sealing effect of the workpiece, but also reduces the service life of the sealing member. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that the seal is easily displaced or even falls off on the workpiece, seriously affecting the sealing effect of the workpiece and reducing the service life of the seal, thereby providing a sealing structure and workpiece.

[0004] In the first aspect, the utility model provides a sealing structure, which is applied to a first workpiece and a second workpiece that are sealed together, comprising: a sealing groove, which is suitable for being opened on the mating surfaces of the first workpiece and the second workpiece, the sealing groove having a groove top close to the groove opening and a groove bottom away from the groove opening, and the setting size of the groove top is smaller than the setting size of the groove bottom; a sealing member, comprising an inner side and an outer side, the inner side of the sealing member is embedded in the sealing groove, the setting size of the inner side is larger than the setting size of the groove top, and at least part of the structure of the outer side is located outside the sealing groove.

[0005] Optionally, the cross-sectional size of the sealing groove gradually decreases from the bottom of the groove to the top of the groove.

[0006] Optionally, the cross-sectional size of the seal gradually decreases from the inside to the outside.

[0007] Optionally, the sealing member is provided with an avoidance groove, and the avoidance groove is extended on the inner end surface opposite to the groove bottom.

[0008] Optionally, the avoidance groove is constructed as an arc-shaped groove structure.

[0009] Optionally, the avoidance groove is arranged in the middle of the inner end surface.

[0010] Optionally, the sealing groove and the sealing element are both configured as an annular structure.

[0011] Optionally, the radial dimension of the sealing member is larger than the radial dimension of the sealing groove, and two axial side surfaces of the sealing member are respectively in contact with groove side walls on both sides of the sealing groove.

[0012] In a second aspect, the utility model provides a workpiece, including: a first workpiece and a second workpiece, wherein a mating surface is formed between the first workpiece and the second workpiece; as in the above-mentioned sealing structure, the first workpiece and the second workpiece are suitable for sealed mating through the sealing structure.

[0013] Optionally, the sealing groove is formed on a side of the first workpiece facing the second workpiece; or, the sealing groove is formed on a side of the second workpiece facing the first workpiece.

[0014] By using the technical solution of the utility model, the bottom size of the sealing groove is larger, the top size is smaller, and the inner side of the sealing member matched with the sealing groove is set larger than the top size of the groove, so the sealing member cannot be separated from the sealing groove through the notch at the top of the groove, and at least part of the structure on the outer side of the sealing member is located outside the sealing groove, so that the sealing member can form a close contact between the matching surfaces of the first workpiece and the second workpiece to ensure the sealing effect. Even if there is frequent axial movement or frequent disassembly and assembly between the first workpiece and the second workpiece, the sealing member will not be separated from the sealing groove, so the sealing member will not be displaced relative to the workpiece or fall off from the workpiece, and will not affect the sealing effect of the workpiece or reduce the service life of the sealing member, and the sealing reliability is higher.

[0015] The utility model has at least the following advantages:

[0016] 1. Affected by the force of the workpiece or the viscosity of the material, the seal is not easy to separate from the sealing groove, which is convenient for ensuring the sealing effect and the service life of the seal, and the reliability of the seal is high.

[0017] 2. An avoidance groove is set on the inner side of the seal to provide a buffer for the stress deformation of the seal, further ensuring the service life of the seal.

[0018] 3. The overall structure is simple, easy to process and manufacture, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic cross-sectional view of a sealing structure and a workpiece to which the sealing structure is applied according to an embodiment of the utility model;

[0021] Figure 2 A schematic cross-sectional view of a sealing groove according to an embodiment of the utility model;

[0022] Figure 3 A cross-sectional schematic diagram of a sealing member according to an embodiment of the utility model;

[0023] Figure 4 for Figure 1 A partial enlarged view of .

[0024] Description of reference numerals:

[0025] 1. First workpiece; 11. First mating surface; 2. Second workpiece; 21. Second mating surface; 3. Sealing structure; 31. Sealing groove; 311. Groove bottom; 312. Groove top; 32. Sealing member; 321. Inside; 322. Outside; 323. Avoidance groove; 324. First side; 325. Second side. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] In the existing sealing structure, a sealing member with a rectangular or O-shaped cross section is usually used, which is installed in a rectangular groove of a first workpiece to achieve sealing between the first workpiece and the second workpiece. However, when the first workpiece and the second workpiece frequently move axially or need to be frequently disassembled, the sealing member is easily displaced or even falls off from the first workpiece.

[0028] For example, the first workpiece and the second workpiece are a cylinder and a piston respectively, and the seal is set in a rectangular groove of the outer wall of the piston between the inner wall of the cylinder and the outer wall of the piston. During the working process of the cylinder and the piston, the two slide relative to each other along the axial direction. Under the influence of friction, material adhesion or other impact forces, the seal is easily displaced outside the rectangular groove, so that it is squeezed and deformed in the working state of the cylinder and the piston, which not only seriously affects the sealing effect of the workpiece, but also reduces the service life of the seal.

[0029] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that the seal is easily displaced or even falls off on the workpiece, seriously affecting the sealing effect of the workpiece and reducing the service life of the seal, thereby providing a sealing structure and workpiece.

[0030] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0031] According to an embodiment of the utility model, on the one hand, a sealing structure 3 is provided, which is applied to the first workpiece 1 and the second workpiece 2 for sealing matching, that is, the first workpiece 1 and the second workpiece 2 are sealed and matched through the sealing structure 3. Specifically, the sealing structure 3 includes a sealing groove 31 and a sealing member 32. The sealing groove 31 is suitable for being opened on the matching surface of the first workpiece 1 and the second workpiece 2, and the sealing groove 31 has a groove top 312 close to the groove and a groove bottom 311 away from the groove, and the setting size of the groove top 312 is smaller than the setting size of the groove bottom 311. The sealing member 32 includes an inner side 321 and an outer side 322. The inner side 321 of the sealing member 32 is embedded in the sealing groove 31, the setting size of the inner side 321 is larger than the setting size of the groove top 312, and at least part of the structure of the outer side 322 is located outside the sealing groove 31.

[0032] In this embodiment, the bottom 311 of the sealing groove 31 is relatively large, the top 312 is relatively small, and the inner side 321 of the sealing member 32 matched with the sealing groove 31 is set larger than the top 312 of the groove, so the sealing member 32 cannot be separated from the sealing groove 31 through the notch of the top 312 of the groove, and at least part of the structure of the outer side 322 of the sealing member 32 is located outside the sealing groove 31, so that the sealing member 32 can form a close contact between the mating surfaces of the first workpiece 1 and the second workpiece 2 to ensure the sealing effect. Even if there is frequent axial movement or frequent disassembly and assembly between the first workpiece 1 and the second workpiece 2, the sealing member 32 will not be separated from the sealing groove 31, so the sealing member 32 will not be displaced relative to the workpiece or fall off from the workpiece, and will not affect the sealing effect of the workpiece or reduce the service life of the sealing member 32, and the sealing reliability is higher.

[0033] It can be understood that the inner side 321 of the sealing member 32 is embedded in the sealing groove 31 , so the setting size of the inner side 321 is smaller than the setting size of the groove bottom 311 .

[0034] Furthermore, at least part of the structure of the outer side 322 of the sealing member 32 is located outside the sealing groove 31 , and the size of the part of the structure located outside the sealing groove 31 is larger than the size of the groove top 312 to further ensure the sealing effect.

[0035] It should be noted that the sealing groove 31 is an integrally formed arrangement, the groove bottom 311 refers to the portion of the sealing groove 31 close to the groove bottom wall, which can be understood as the groove bottom 311 including the groove bottom wall; the groove top 312 refers to the portion of the sealing groove 31 close to the groove opening, which can be understood as the groove opening being formed at the groove top 312. In this embodiment, the arrangement dimensions of the groove bottom 311 and the groove top 312 can be understood as the cross-sectional dimensions in the direction from the groove bottom 311 to the groove top 312.

[0036] It should be noted that the seal 32 is integrally formed, the inner side 321 refers to the side of the seal 32 facing the groove bottom 311, and the outer side 322 refers to the side of the seal 32 away from the groove bottom 311. In this embodiment, the setting dimensions of the inner side 321 and the outer side 322 can be understood as the cross-sectional dimensions in the direction from the inner side 321 to the outer side 322.

[0037] by Figure 1 As shown in the figure, in this embodiment, the direction from the bottom 311 of the groove to the top 312 of the groove and the direction from the inner side 321 to the outer side 322 are both horizontal. In the horizontal direction, the thickness of the sealing member 32 is greater than or slightly greater than the groove depth of the sealing groove 31, so that it can be in close contact with the first workpiece 1 and the second workpiece 2 when squeezed, ensuring the reliability of the seal.

[0038] Furthermore, in this embodiment, if Figure 2 As shown, the cross-sectional size of the sealing groove 31 gradually decreases from the groove bottom 311 to the groove top 312, so as to facilitate the processing of the sealing groove 31. Exemplarily, the sealing groove 31 can be a trapezoidal groove.

[0039] Furthermore, in this embodiment, if Figure 3 As shown, the cross-sectional dimensions of the seal 32 gradually decrease from the inner side 321 to the outer side 322, so as to match the set dimensions of the sealing groove 31 and achieve a close fit with the sealing groove 31. Exemplarily, the cross-sectional shape of the seal 32 can also be roughly configured as a trapezoid.

[0040] It should be noted that the size of the bottom 311 of the sealing groove 31 is close to the size of the inner side 321 of the sealing member 32, and the size of the bottom 311 is slightly larger than the size of the inner side 321, and the size of the top 312 is smaller than the size of the outer side 322. Figure 4 As shown, when the first workpiece 1 and the second workpiece 2 are sealed together, the seal 32 is deformed by the extrusion force, and the first side surface 324 and the second side surface 325 on both sides of the seal 32 can be in close contact with the groove side walls on both sides of the sealing groove 31 to further ensure the sealing effect.

[0041] For example, Figure 4 As shown, in this embodiment, the first side surface 324 and the second side surface 325 of the sealing member 32 are both inclined surfaces, the outer side 322 of the sealing member 32 is an arc surface, and the connection between the first side surface 324 and the inner side 321 and the connection between the second side surface 325 and the inner side 321 are both chamfered. Correspondingly, the groove sidewalls of the sealing groove 31 are also inclined surfaces, and the connection between the groove sidewalls on both sides and the groove bottom wall is also chamfered.

[0042] Furthermore, in this embodiment, if Figure 3 and Figure 4As shown, the seal 32 is provided with an avoidance groove 323, which is extended to the end surface of the inner side 321 opposite to the groove bottom 311. When the seal 32 is under pressure, the avoidance groove 323 can provide a buffer for the deformation of the seal 32, prevent the seal 32 from being over-pressurized, and thereby ensure the service life of the seal 32.

[0043] Preferably, the avoidance groove 323 is constructed as an arc-shaped groove structure, and the avoidance groove 323 is arranged in the middle of the end surface of the inner side 321 to improve the uniformity of the compression deformation of the seal 32. The uniform deformation of the seal 32 is not only beneficial to ensuring the sealing effect, but also beneficial to ensuring the service life of the seal 32.

[0044] It can be understood that, in this embodiment, the end surface of the inner side 321 refers to the surface in contact with the bottom wall of the groove.

[0045] Exemplarily, there may be one sealing groove 31 or multiple sealing grooves 31 may be arranged side by side, as long as the deformation effect of the buffer seal 32 can be achieved.

[0046] Further, in this embodiment, the sealing groove 31 and the sealing member 32 are both configured as an annular structure, and the sealing member 32 is disposed throughout the entire circumference of the sealing groove 31. Exemplarily, the radial dimension of the sealing member 32 (i.e., the thickness dimension of the sealing member 32 mentioned above) is greater than or slightly greater than the radial dimension of the sealing groove 31 (i.e., the groove depth of the sealing groove 31 mentioned above), and the two axial side surfaces of the sealing member 32 (i.e., the first side surface 324 and the second side surface 325 mentioned above) are respectively in contact with the groove side walls on both sides of the sealing groove 31 to ensure the reliability of the seal.

[0047] In this embodiment, the avoidance groove 323 is extended along the entire circumference on the end surface of the inner side 321 of the sealing member 32 .

[0048] It should be noted that, in the present embodiment, the sealing groove 31 and the sealing member 32 may be constructed as circular, square or other annular structures, as long as the structures of the two are the same and can cooperate with each other.

[0049] It can be understood that, in this embodiment, the sealing member 32 is made of elastic material.

[0050] In some embodiments not shown in the figures, the sealing groove 31 is constructed as an annular structure, and the sealing member 32 may also be constructed as a strip structure; or, both the sealing groove 31 and the sealing member 32 may be constructed as strip structures. The present application does not make any specific limitation on this, as long as the function of preventing the sealing member 32 from detaching from the sealing groove 31 can be achieved.

[0051] In some embodiments not shown in the figures, the sealing groove 31 may also be configured as an arc groove, and specifically, its cross section may be a major arc with an opening, so that the setting size of the groove top 312 is smaller than the setting size of the groove bottom 311. Accordingly, the outer contour of the sealing member 32 matching the sealing groove 31 is also configured as an arc surface.

[0052] Alternatively, in some embodiments not shown in the figures, the sealing groove 31 can be constructed as a rectangular groove, and a convex edge is provided at the groove opening of the rectangular groove so that the setting size of the groove top 312 is smaller than the setting size of the groove bottom 311.

[0053] According to an embodiment of the utility model, on the other hand, a workpiece is further provided, comprising a first workpiece 1, a second workpiece 2 and a sealing structure 3 disposed therebetween, wherein the first workpiece 1 and the second workpiece 2 are adapted to be sealed and matched through the sealing structure 3. Specifically, a mating surface is formed between the first workpiece 1 and the second workpiece 2, a sealing groove 31 of the sealing structure 3 is provided on the mating surface between the first workpiece 1 and the second workpiece 2, and a sealing member 32 is disposed in the sealing groove 31. It can be understood that the sealing structure 3 in this embodiment can be the sealing structure 3 described in any of the above embodiments.

[0054] Specifically, the sealing groove 31 has a groove top 312 close to the groove opening and a groove bottom 311 away from the groove opening, and the setting size of the groove top 312 is smaller than the setting size of the groove bottom 311. The sealing member 32 includes an inner side 321 and an outer side 322, and the inner side 321 of the sealing member 32 is embedded in the sealing groove 31, and the setting size of the inner side 321 is larger than the setting size of the groove top 312, and at least part of the structure of the outer side 322 is located outside the sealing groove 31.

[0055] In this embodiment, the bottom 311 of the sealing groove 31 is relatively large, the top 312 is relatively small, and the inner side 321 of the sealing member 32 matched with the sealing groove 31 is set larger than the top 312 of the groove, so the sealing member 32 cannot be separated from the sealing groove 31 through the notch of the top 312 of the groove, and at least part of the structure of the outer side 322 of the sealing member 32 is located outside the sealing groove 31, so that the sealing member 32 can form a close contact between the mating surfaces of the first workpiece 1 and the second workpiece 2 to ensure the sealing effect. Even if there is frequent axial movement or frequent disassembly and assembly between the first workpiece 1 and the second workpiece 2, the sealing member 32 will not be separated from the sealing groove 31, so the sealing member 32 will not be displaced relative to the workpiece or fall off from the workpiece, and will not affect the sealing effect of the workpiece or reduce the service life of the sealing member 32, and the sealing reliability is higher.

[0056] It can be understood that the inner side 321 of the sealing member 32 is embedded in the sealing groove 31 , so the setting size of the inner side 321 is smaller than the setting size of the groove bottom 311 .

[0057] Furthermore, at least part of the structure of the outer side 322 of the sealing member 32 is located outside the sealing groove 31 , and the size of the part of the structure located outside the sealing groove 31 is larger than the size of the groove top 312 to further ensure the sealing effect.

[0058] Furthermore, the above-mentioned mating surface includes a first mating surface 11 and a second mating surface 21, wherein the first mating surface 11 refers to the side of the first workpiece 1 facing the second workpiece 2, and the second mating surface 21 refers to the side of the second workpiece 2 facing the first workpiece 1. Figure 4 As shown, the sealing groove 31 can be opened on the second mating surface 21, that is, on the side of the second workpiece 2 facing the first workpiece 1; or, in some embodiments not shown in the figures, the sealing groove 31 can also be opened on the first mating surface 11, that is, on the side of the first workpiece 1 facing the second workpiece 2, and the setting method is flexible.

[0059] It should be noted that the present invention does not limit the specific arrangement of the first workpiece 1 and the second workpiece 2, as long as the sealing structure 3 of the present invention can achieve the sealing cooperation between the two. Figure 1 As shown, the first workpiece 1 is coaxially sleeved on the outer side 322 of the second workpiece 2. Alternatively, in some embodiments not shown in the figures, the first workpiece 1 can be matched with the top, bottom or side of the second workpiece 2.

[0060] Furthermore, the present invention does not specifically limit the number of sealing structures 3 provided between the first workpiece 1 and the second workpiece 2. For example, Figure 1 As shown, a sealing structure 3 may be provided between the first workpiece 1 and the second workpiece 2. Alternatively, in some embodiments not shown in the figures, a plurality of sealing structures 3 may be provided between the first workpiece 1 and the second workpiece 2, and the plurality of sealing structures 3 are distributed along the axial direction of the first workpiece 1 and the second workpiece 2 at intervals.

[0061] According to the above content, the utility model application has at least the following advantages:

[0062] 1. Affected by the force of the workpiece or the viscosity of the material, the seal 32 is not easy to separate from the sealing groove 31, which is convenient for ensuring the sealing effect and the service life of the seal 32, and the reliability of the seal is high.

[0063] 2. An avoidance groove 323 is provided on the inner side 321 of the sealing member 32 to provide a buffer for the stress deformation of the sealing member 32 and further ensure the service life of the sealing member 32 .

[0064] 3. The overall structure is simple, easy to process and manufacture, and the production cost is low.

[0065] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A sealing structure, applied to a first workpiece (1) and a second workpiece (2) for sealing, characterized in that: include: A sealing groove (31) adapted to be provided on the mating surfaces of the first workpiece (1) and the second workpiece (2); The sealing groove (31) has a groove top (312) close to the groove opening and a groove bottom (311) away from the groove opening, and the setting size of the groove top (312) is smaller than the setting size of the groove bottom (311); A sealing member (32) comprises an inner side (321) and an outer side (322), wherein the inner side (321) of the sealing member (32) is embedded in the sealing groove (31), the setting size of the inner side (321) is larger than the setting size of the groove top (312), and at least the structure of the outer side (322) is located outside the sealing groove (31).

2. The sealing structure according to claim 1, characterized in that: From the groove bottom (311) to the groove top (312), the cross-sectional size of the sealing groove (31) gradually decreases.

3. The sealing structure according to claim 2, characterized in that: From the inner side (321) to the outer side (322), the cross-sectional size of the sealing element (32) gradually decreases.

4. The sealing structure according to claim 3, characterized in that: The sealing member (32) is provided with an avoidance groove (323), and the avoidance groove (323) is extended and arranged on the end surface of the inner side (321) opposite to the groove bottom (311).

5. The sealing structure according to claim 4, characterized in that: The avoidance groove (323) is constructed as an arc-shaped groove structure.

6. The sealing structure according to claim 5, characterized in that: The avoidance groove (323) is arranged at the middle portion of the end surface of the inner side (321).

7. The sealing structure according to any one of claims 1 to 6, characterized in that: The sealing groove (31) and the sealing element (32) are both configured as an annular structure.

8. The sealing structure according to claim 7, characterized in that: The radial dimension of the sealing member (32) is greater than the radial dimension of the sealing groove (31), and the two axial side surfaces of the sealing member (32) are respectively in contact with the groove side walls on both sides of the sealing groove (31).

9. A workpiece, characterized in that: include: A first workpiece (1) and a second workpiece (2), wherein a mating surface is formed between the first workpiece (1) and the second workpiece (2); The sealing structure (3) according to any one of claims 1 to 8, wherein the first workpiece (1) and the The second workpiece (2) is adapted to be sealingly fitted via the sealing structure (3).

10. The workpiece according to claim 9, characterized in that include: The sealing groove (31) is formed on the side of the first workpiece (1) facing the second workpiece (2); Alternatively, the sealing groove (31) is provided on the side surface of the second workpiece (2) facing the first workpiece (1).

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