A sealing mechanism with upper and lower parts

Abstract

The present invention discloses a top-to-bottom sealing mechanism comprising an upper sealing assembly and a lower sealing assembly disposed in an opposed relationship. The upper sealing assembly comprises: an upper sealing mounting plate having a clearance groove extending through its upper and lower surfaces, thereby forming an annular structure; an upper sealing frame and an upper sealing ring embedded in the lower surface of the upper sealing mounting plate and arranged around the edge of the clearance groove; and the lower sealing assembly comprises: a lower sealing mounting plate having a central portion formed thereon and lateral positioning grooves arranged around the central portion; and a plurality of lateral positioning assemblies disposed in the lateral positioning grooves. According to the present invention, the sealing success rate and sealing effect are improved, facilitating the smooth execution of subsequent airtightness testing operations.

Description

Technical Field

[0001] The present invention relates to the field of non-standard automation, and in particular to a sealing mechanism with upper and lower parts matching each other. Background Art

[0002] In the process of airtightness testing in the field of non-standard automation, it is well known that sealing mechanisms of different structures are used to achieve sealing on the workpiece surface. In the process of studying and implementing sealing on the workpiece surface, researchers found that the sealing mechanisms in the existing technology have at least the following problems:

[0003] The complex structure leads to cumbersome steps in workpiece loading, positioning, sealing and airtightness testing. The cumbersome operation steps easily lead to poor sealing effect on the workpiece surface or low sealing success rate, which ultimately reduces the efficiency of airtightness testing.

[0004] In view of this, it is necessary to develop a sealing mechanism that matches the upper and lower parts to solve the above problems. Summary of the Invention

[0005] In order to overcome the problems existing in the above-mentioned sealing mechanism, the technical problem to be solved by the present invention is to provide an upper and lower matching sealing mechanism that can simplify the loading-positioning-sealing-detection steps, which improves the sealing success rate and sealing effect, and is conducive to the smooth progress of subsequent airtightness detection operations.

[0006] As for the upper and lower combined sealing mechanism, the present invention solves the above-mentioned technical problems by comprising an upper sealing assembly and a lower sealing assembly arranged opposite to each other in the upper and lower directions, wherein the upper sealing assembly comprises:

[0007] An upper sealing mounting plate, wherein a clearance groove is formed through the upper and lower surfaces thereof so that the upper sealing mounting plate has an annular structure; and

[0008] An upper sealing frame and an upper sealing ring embedded in the lower surface of the upper sealing mounting plate and arranged around the edge of the clearance groove;

[0009] The lower sealing assembly comprises:

[0010] a lower sealing mounting plate having a central portion proximate to a central area and lateral positioning grooves arranged around the central portion;

[0011] a plurality of lateral positioning assemblies arranged in the lateral positioning slots, the lateral positioning assemblies being arranged to consist of at least two lateral positioning subsets, each lateral positioning subset including a pair of lateral positioning assemblies arranged opposite to each other, and a corresponding pair of lateral positioning assemblies in each lateral positioning subset being arranged opposite to each other;

[0012] at least three positioning nozzles arranged in the central portion; and

[0013] a first sealing ring, which is arranged at the edge of the central portion and surrounds the positioning nozzle therein;

[0014] When a workpiece is placed in the area surrounded by the lateral positioning assembly, the workpiece is positioned to a preset position under the lateral positioning action of the lateral positioning assembly. The positioning nozzle then suctions and positions the lower surface of the workpiece, and the first sealing ring forms a seal on the lower surface of the workpiece. The upper sealing assembly is then pressed downward onto the workpiece, causing the upper sealing ring to seal the outer periphery of the upper surface of the workpiece. The downward pressure provided by the upper sealing assembly can also further improve the sealing performance of the first sealing ring on the lower surface of the workpiece.

[0015] Optionally, the lower surface of the upper seal mounting plate is provided with an upper seal mounting groove arranged around the edge of the clearance groove, the upper seal frame is removably mounted in the upper seal mounting groove, and the upper seal ring covers the upper seal frame and is arranged concentrically with the upper seal frame so that when the upper seal ring is in the upper seal mounting groove, the upper seal ring is located between the upper seal frame and the upper seal mounting plate. When the upper seal ring is worn or needs to be replaced with a corresponding seal ring, the upper seal frame can be removed from the upper seal mounting groove, the original upper seal ring can be removed from the upper seal frame, and then replaced with a new upper seal ring.

[0016] Optionally, the upper surface of the upper sealing frame is arranged with at least three connecting columns arranged around its through holes, and the upper sealing frame is detachably connected to the upper sealing mounting plate through the connecting columns, wherein when the upper sealing ring covers the upper sealing frame, the corresponding part of the upper sealing ring is sleeved on the connecting columns.

[0017] Optionally, a connecting through hole extending along the axial direction thereof is provided in the connecting column, and a connecting component is fitted in the connecting through hole to achieve a detachable connection with the upper sealing mounting plate.

[0018] Optionally, a guide cut surface is formed on the inner side of the upper surface of the upper sealing frame, surrounding its through hole. The upper sealing ring comprises a connecting section, a transition section, an overhanging section, and a sealing section, sequentially connected from the outside to the inside. When the upper sealing ring is covered on the upper sealing frame, the connecting section is sleeved onto the connecting post, and the transition section mates with the guide cut surface. The transition section allows for a tangential transition to the overhanging section. This prevents premature damage to the connection between the overhanging section and the connecting section due to stress concentration during prolonged sealing operations, and allows for a tighter clamping between the upper sealing frame and the upper sealing mounting plate.

[0019] Optionally, the overhanging section overhangs downward from the bottom of the transition section, and the sealing section radially extends from the inner side of the bottom of the overhanging section toward the inner side of the through hole of the upper sealing frame, so that the lower surface of the sealing section is lower than the lower surface of the upper sealing frame. This ensures that when the upper sealing frame is pressed down to seal, it will not contact the sealing surface.

[0020] Optionally, the lateral positioning assembly includes:

[0021] A side limit stop bar fixedly arranged in the side positioning groove is provided with positioning through holes penetrating the upper and lower surfaces thereof;

[0022] a positioning stopper slidably disposed in the positioning through hole along a vertical direction; and

[0023] a positioning and resetting component elastically supported on the lower surface of the positioning stopper;

[0024] Wherein, a lateral positioning groove connected to the positioning through hole is provided on the side surface thereof, so that when the positioning block is installed in the lateral positioning groove, at least the corresponding side surface of the positioning block is exposed outward from the lateral positioning groove and protrudes from the corresponding side surface of the positioning block.

[0025] Optionally, the positioning block includes:

[0026] A positioning body slidably connected to the positioning through hole;

[0027] a blocking portion integrally formed on a side surface of the positioning body, the blocking portion being exposed outward through the lateral positioning groove; and

[0028] a limiting portion fixedly connected to the bottom of the positioning body and extending horizontally outward along the X-axis direction;

[0029] Among them, the X-axial width of the lateral positioning groove is smaller than the X-axial width of the positioning body, and the X-axial width of the positioning body is larger than the X-axial width of the lateral positioning groove, so that the positioning body cannot be displaced sideways through the lateral positioning groove.

[0030] Optionally, a guide curved surface is formed on the top of the blocking portion, which smoothly transitions toward the inner side of the positioning through hole, so that the thickness of the guide curved surface in the Y-axis direction gradually expands from top to bottom. This allows the guide curved surface to adaptively position workpieces within a set size range during positioning, thereby improving positioning convenience.

[0031] Optionally, the top of the positioning body is at least partially raised upward to form a limiting portion.

[0032] One of the above technical solutions has the following advantages or beneficial effects: it improves the sealing success rate and sealing effect, and is conducive to the smooth progress of subsequent air tightness testing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0034] Figure 1 A three-dimensional diagram of a top-bottom matching sealing mechanism according to one embodiment of the present invention;

[0035] Figure 2 A longitudinal cross-sectional view of an upper and lower combined sealing mechanism according to one embodiment of the present invention;

[0036] Figure 3 An exploded view of an upper sealing assembly in an upper and lower combined sealing mechanism according to one embodiment of the present invention;

[0037] Figure 4 A cross-sectional view of an upper sealing assembly in an upper and lower combined sealing mechanism according to one embodiment of the present invention;

[0038] Figure 5 A longitudinal cross-sectional view of the upper sealing frame and the upper sealing ring in the upper and lower combined sealing mechanism according to one embodiment of the present invention;

[0039] Figure 6 A perspective view of a lower sealing carrier according to one embodiment of the present invention;

[0040] Figure 7 A top view of a lower sealing carrier according to one embodiment of the present invention;

[0041] Figure 8 for Figure 7 Cross-sectional view along EE direction;

[0042] Figure 9 A perspective view of a lateral positioning assembly in a lower sealing carrier according to one embodiment of the present invention;

[0043] Figure 10 A front view of a lateral positioning assembly in a lower sealing carrier according to one embodiment of the present invention;

[0044] Figure 11 An exploded view of a lateral positioning assembly in a lower sealing carrier according to one embodiment of the present invention;

[0045] Figure 12This is a schematic diagram of a combination of multiple lateral positioning assemblies proposed in one embodiment of the present invention for lateral positioning of a workpiece. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.

[0048] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The words "first", "second" and similar terms used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] In the following description, words such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined relative to the structure shown in the drawings. In particular, "height" is equivalent to the dimension from top to bottom, "width" is equivalent to the dimension from left to right, and "depth" is equivalent to the dimension from front to back. They are relative concepts and may therefore change accordingly depending on their different positions and different usage states. Therefore, these or other directions should not be interpreted as restrictive terms.

[0050] Terms referring to attachment, coupling, and the like (eg, "connected" and "attached") refer to structures being fixed or attached to one another, directly or indirectly, through intermediate structures, as well as movable or rigid attachments or relationships, unless expressly stated otherwise.

[0051] Example 1

[0052] Figures 1 to 4 Shows embodiment 1 of the present invention, combined with Figures 1 and 2 As shown in FIG. 1 , it can be seen that the upper and lower combined sealing mechanism 62 includes an upper sealing component and a lower sealing component arranged opposite to each other, and the upper sealing component includes:

[0053] An upper sealing mounting plate 621 having a clearance groove 6211 extending through the upper and lower surfaces thereof so that the upper sealing mounting plate 621 has an annular structure; and

[0054] An upper sealing frame 623 and an upper sealing ring 622 are embedded in the lower surface of the upper sealing mounting plate 621 and arranged around the edge of the clearance groove 6211;

[0055] The lower sealing assembly comprises:

[0056] A lower sealing mounting plate 624 is formed with a central portion 6241 near the center area and lateral positioning grooves 6242 arranged around the central portion 6241;

[0057] a plurality of lateral positioning assemblies 66 disposed in the lateral positioning slots 6242, wherein the lateral positioning assemblies 66 are arranged to be composed of at least two lateral positioning subsets, each lateral positioning subset including a pair of lateral positioning assemblies 66 disposed opposite to each other, and the corresponding pair of lateral positioning assemblies 66 in each lateral positioning subset are disposed opposite to each other;

[0058] at least three positioning nozzles 627 arranged in the central portion 6241; and

[0059] a first sealing ring 628 , which is arranged at the edge of the central portion 6241 and surrounds the positioning nozzle 627 therein;

[0060] When a workpiece is placed in the area surrounded by the lateral positioning assembly 66, the workpiece is positioned to a predetermined position under the lateral positioning action of the lateral positioning assembly 66. The positioning nozzle 627 then suctions and positions the lower surface of the workpiece, and the first sealing ring 628 forms a seal on the lower surface of the workpiece. The upper sealing assembly is then pressed downward onto the workpiece, causing the upper sealing ring 622 to seal the outer periphery of the upper surface of the workpiece. The downward pressure provided by the upper sealing assembly can also further improve the sealing performance of the first sealing ring 628 on the lower surface of the workpiece.

[0061] Reference Figure 3 and Figure 4The lower surface of the upper seal mounting plate 621 is provided with an upper seal mounting groove 6212 arranged around the edge of the clearance groove 6211. The upper seal frame 623 is detachably mounted in the upper seal mounting groove 6212. The upper seal ring 622 covers the upper seal frame 623 and is arranged concentrically with the upper seal frame 623 so that when the upper seal ring 622 is in the upper seal mounting groove 6212, it is located between the upper seal frame 623 and the upper seal mounting plate 621. When the upper seal ring 622 becomes worn or needs to be replaced with a corresponding seal ring, the upper seal frame 623 can be removed from the upper seal mounting groove 6212, the original upper seal ring 622 can be removed from the upper seal frame 623, and then replaced with a new upper seal ring 622.

[0062] As a further improvement, the upper surface of the upper sealing skeleton 623 is arranged with at least three connecting columns 6231 arranged around its through holes, and the upper sealing skeleton 623 is detachably connected to the upper sealing mounting plate 621 through the connecting columns 6231, wherein when the upper sealing ring 622 is covered on the upper sealing skeleton 623, the corresponding part of the upper sealing ring 622 is sleeved on the connecting columns 6231.

[0063] As a further improvement, a connecting through hole 6233 extending along the axial direction is provided in the connecting column 6231 , and a connecting component is fitted in the connecting through hole 6233 to achieve a detachable connection with the upper sealing mounting plate 621 .

[0064] As a further improvement, a guide cut surface 6232 is formed on the inner side of the upper surface of the upper sealing skeleton 623 and is arranged around its through hole. The upper sealing ring 622 includes a connecting section 6221, a transition section 6223, an overhanging section 6222 and a sealing section 6224 that are connected in sequence from the outside to the inside. When the upper sealing ring 622 is covered on the upper sealing skeleton 623, the connecting section 6221 is sleeved on the connecting column 6231, and the transition section 6223 is in contact with the guide cut surface 6232.

[0065] The transition section 6223 can make the overhang section 6222 transition tangentially. On the one hand, it can prevent the connection between the overhang section 6222 and the connecting section 6221 from being prematurely damaged due to stress concentration during long-term sealing operations. On the other hand, it can be clamped more tightly by the upper sealing frame 623 and the upper sealing mounting plate 621 to increase the contact area.

[0066] As a further improvement, the overhang section 6222 hangs downward from the bottom of the transition section 6223, and the sealing section 6224 extends radially from the inner side of the bottom of the overhang section 6222 toward the inner side of the through hole of the upper sealing skeleton 623, so that the lower surface of the sealing section 6224 is lower than the lower surface of the upper sealing skeleton 623.

[0067] Therefore, when pressing down to seal, the upper sealing frame 623 will not contact the sealing surface.

[0068] As a further improvement, the guide cut surface 6232 forms an angle α with the vertical direction, and the angle α is 30° to 60°.

[0069] As a further improvement, at least three downward pressure guide pillars 6212 arranged around the upper sealing frame 623 and the upper sealing ring 622 are fixed to the lower surface of the upper sealing mounting plate 621 .

[0070] As a further improvement, the upper sealing frame 623 is at least partially made of a rigid and / or hard material, which enables the upper sealing frame 623 to provide stable support for the upper sealing ring 622 .

[0071] As a further improvement, the upper sealing ring 622 is at least partially made of a soft and / or flexible material. This allows the upper sealing ring 622 to deform adaptively according to the local size of the sealing surface when it is attached to the sealing surface, thereby providing better sealing performance.

[0072] Optionally, a lower sealing area 6281 adapted to the workpiece opening is formed on the first sealing ring 628 , and an air tightness detection air path 6243 leading to the top of the lower sealing area 6281 is opened in the lower sealing mounting plate 624 .

[0073] Optionally, a vacuum air passage 6244 leading to the positioning suction nozzle 627 is opened in the lower sealing mounting plate 624 .

[0074] Reference Figures 9 to 12 , the lateral positioning assembly 66 includes:

[0075] A side limit stop bar 661 fixedly disposed in the side positioning groove 6242 is provided with positioning through holes 662 penetrating the upper and lower surfaces thereof;

[0076] a positioning stopper 663 slidably disposed in the positioning through hole 662 along a vertical direction; and

[0077] a positioning reset component 664 elastically supported on the lower surface of the positioning stopper 663;

[0078] In which, a lateral positioning groove 6621 is opened on the side of the positioning through hole 662 and is connected to it, so that when the positioning block 663 is installed in the lateral positioning groove 6621, at least the corresponding side of the positioning block 663 is exposed outward from the lateral positioning groove 6621 and protrudes from the corresponding side of the positioning block 663.

[0079] Furthermore, the positioning block 663 includes:

[0080] A positioning body 6631 slidably connected to the positioning through hole 662;

[0081] a blocking portion 6633 integrally formed on a side surface of the positioning body 6631 , the blocking portion 6633 being exposed outward through the lateral positioning slot 6621 ; and

[0082] a limiting portion 6632 fixed to the bottom of the positioning body 6631 and extending horizontally outward along the X-axis direction;

[0083] Among them, the X-axial width of the lateral positioning groove 6621 is smaller than the X-axial width of the positioning body 6631, and the X-axial width of the positioning body 6631 is larger than the X-axial width of the lateral positioning groove 6621, so that the positioning body 6631 cannot be displaced to the side through the lateral positioning groove 6621.

[0084] Optionally, a curved guide surface 6633' is formed on the top of the blocking portion 6633, smoothly transitioning toward the inner side of the positioning hole 662. This allows the thickness of the curved guide surface 6633' in the Y-axis direction to gradually expand from top to bottom. This allows the curved guide surface 6633' to adaptively position workpieces within a set size range during positioning, improving positioning convenience.

[0085] Furthermore, at least a portion of the top of the positioning body 6631 protrudes upward to form a limiting portion 6634 .

[0086] Furthermore, at least two longitudinally extending ridges 6635 are formed on the side of the positioning body 6631 opposite to the lateral positioning groove 6621 , thereby reducing the friction between the positioning body 6631 and the positioning through hole 662 .

[0087] Furthermore, a clearance space 6622 is formed on the side limit stop bar 661, located directly below the positioning hole 662. The X-axis dimension of the clearance space 6622 is larger than the X-axis dimension of the positioning hole 662. The clearance space 6622 is used to provide accommodation space for the limiting portion 6632 when the positioning reset member 664 is retracted.

[0088] Furthermore, a second sealing ring 625 arranged around the lateral positioning assembly 66 is provided on the lower sealing mounting plate 624 .

[0089] Furthermore, the blocking portion 6633 is at least partially made of a soft and / or flexible material to prevent damage to the workpiece after collision with the blocking portion 6633.

[0090] The number of devices and processing scales described herein are intended to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be readily apparent to those skilled in the art.

[0091] The components of the various embodiments described herein may be combined to form other embodiments not specifically described above. Components may be removed from the structures described herein without adversely affecting their operation. Additionally, various individual components may be combined into one or more individual components to perform the functions described herein.

[0092] In addition, although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A sealing mechanism with upper and lower parts, characterized in that: It includes an upper sealing component and a lower sealing component that are arranged opposite to each other, and the upper sealing component includes: An upper sealing mounting plate (621), wherein a through groove (6211) is provided which passes through the upper and lower surfaces thereof so that the upper sealing mounting plate (621) has an annular structure; and An upper sealing frame (623) and an upper sealing ring (622) embedded in the lower surface of the upper sealing mounting plate (621) and arranged around the edge of the clearance groove (6211); The lower sealing assembly comprises: A lower sealing mounting plate (624) having a central portion (6241) near the central area and lateral positioning grooves (6242) arranged around the central portion (6241); a plurality of lateral positioning assemblies (66) arranged in the lateral positioning slots (6242), the lateral positioning assemblies (66) being arranged to be composed of at least two lateral positioning subsets, each lateral positioning subset including a pair of lateral positioning assemblies (66) arranged opposite to each other, and the corresponding pair of lateral positioning assemblies (66) in each lateral positioning subset being arranged opposite to each other; at least three positioning nozzles (627) arranged in the central portion (6241); and a first sealing ring (628) arranged at the edge of the central portion (6241) and surrounding the positioning nozzle (627); When the workpiece is placed in the area surrounded by the lateral positioning assembly (66), the workpiece is positioned to a preset position under the lateral positioning action of the lateral positioning assembly (66), and then the positioning nozzle (627) adsorbs and positions the lower surface of the workpiece, and the first sealing ring (628) forms a seal on the lower surface of the workpiece, and then the upper sealing assembly is pressed down on the workpiece, so that the upper sealing ring (622) seals the outer periphery of the upper surface of the workpiece; The upper surface of the upper sealing frame (623) is provided with at least three connecting columns (6231) arranged around its through holes. The upper sealing frame (623) is detachably connected to the upper sealing mounting plate (621) through the connecting columns (6231). The inner side of the upper surface of the upper sealing frame (623) is formed with a guide cut surface (6232) arranged around its through hole. The upper sealing ring (622) includes a connecting section (6221), a transition section (6223), an overhanging section (6222) and a sealing section (6224) connected in sequence from the outside to the inside. When the upper sealing ring (622) is covered on the upper sealing frame (623), the connecting section (6221) is sleeved on the connecting column (6231), and the transition section (6223) is in contact with the guide cut surface (6232).

2. The upper and lower combined sealing mechanism according to claim 1, characterized in that: The lower surface of the upper sealing mounting plate (621) is provided with an upper sealing mounting groove (6212) arranged around the edge of the clearance groove (6211); the upper sealing frame (623) is detachably mounted in the upper sealing mounting groove (6212); the upper sealing ring (622) covers the upper sealing frame (623) and is arranged concentrically with the upper sealing frame (623) so that when the upper sealing ring (622) is in the upper sealing mounting groove (6212), the upper sealing ring (622) is located between the upper sealing frame (623) and the upper sealing mounting plate (621).

3. The upper and lower combined sealing mechanism according to claim 1, characterized in that: The connecting column (6231) is provided with a connecting through hole (6233) extending along its axial direction, and a detachable connection with the upper sealing mounting plate (621) is achieved by fitting a connecting component in the connecting through hole (6233).

4. The upper and lower combined sealing mechanism according to claim 3, characterized in that: The overhanging section (6222) hangs downward from the bottom of the transition section (6223), and the sealing section (6224) extends radially from the inner side of the bottom of the overhanging section (6222) toward the inner side of the through hole of the upper sealing skeleton (623), so that the lower surface of the sealing section (6224) is lower than the lower surface of the upper sealing skeleton (623).

5. The upper and lower combined sealing mechanism according to claim 1, characterized in that: The lateral positioning assembly (66) includes: A side limit stop bar (661) fixedly disposed in the lateral positioning groove (6242), with positioning through holes (662) extending through the upper and lower surfaces thereof; a positioning stopper (663) slidably disposed in the positioning through hole (662) along a vertical direction; and a positioning reset component (664) elastically supported on the lower surface of the positioning stopper (663); The side surface of the positioning through hole (662) is provided with a lateral limiting groove (6621) connected thereto, so that when the positioning stopper (663) is installed in the lateral limiting groove (6621), at least the corresponding side surface of the positioning stopper (663) is exposed outward from the lateral limiting groove (6621) and protrudes from the corresponding side surface of the positioning stopper (663).

6. The upper and lower combined sealing mechanism according to claim 5, characterized in that: The positioning block (663) comprises: A positioning body (6631) slidably connected to the positioning through hole (662); a blocking portion (6633) integrally formed on the side of the positioning body (6631), the blocking portion (6633) being exposed outwardly through the lateral limiting groove (6621); and A limiting portion (6632) fixedly connected to the bottom of the positioning body (6631) and extending horizontally outward along the X-axis direction; Among them, the X-axial width of the lateral limit groove (6621) is smaller than the X-axial width of the positioning body (6631), and the X-axial width of the positioning body (6631) is larger than the X-axial width of the lateral limit groove (6621), so that the positioning body (6631) cannot be displaced to the side through the lateral limit groove (6621).

7. The upper and lower combined sealing mechanism according to claim 6, characterized in that: The top of the blocking portion (6633) is formed with a guide curved surface (6633') that smoothly transitions to the inner side of the positioning through hole (662), so that the Y-axis thickness of the guide curved surface (6633') gradually expands from top to bottom.

8. The upper and lower combined sealing mechanism according to claim 6, characterized in that: The top of the positioning body (6631) is at least partially protruded upward to form a limiting portion (6634).

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