A through-hole device

Abstract

The utility model discloses a through-hole device, comprising: a top plate, the top plate is provided with a first mounting hole; a bottom plate, the top plate is provided with a second mounting hole and a first avoidance groove, the first avoidance groove is connected with the first mounting hole and extends to the edge of the bottom plate; an elastic body, the elastic body is clamped between the top plate and the bottom plate, the elastic body is provided with a wire-passing hole, and the elastic body is provided with a second avoidance groove, the second avoidance groove is connected with the wire-passing hole and extends to the edge of the elastic body; wherein the axis of the first mounting hole, the axis of the second mounting hole and the axis of the wire-passing hole coincide, and the first avoidance groove and the second avoidance groove are directly opposite; a pressing device, the pressing device comprises a first end and a second end, the top plate and the bottom plate are located between the first end and the second end, and the distance between the first end and the second end is adjustable, so that the top plate and the bottom plate press the elastic body, so that the elastic body is deformed, so that the peripheral wall of the wire-passing hole hugs the wire harness. The device presses the elastic body through the pressing device, so that the peripheral wall of the elastic body hugs the wire harness, thereby realizing the sealing of the line through-hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing wire through holes of a temperature box and a charge and discharge test cabinet, and in particular relates to a through hole device. Background Art

[0002] In the prior art, the through-hole devices at the wire holes are usually relatively complex, and most of them can only seal the corresponding single-size through-holes, and the complex structure makes the subsequent maintenance and replacement of the device inconvenient. Some through-hole devices with relatively simple structures can also achieve simple sealing functions, but they cannot adapt to through-holes of different sizes, and when the user adjusts the number and position of the wire harness, the entire through-hole device must be disassembled to achieve the adjustment. Therefore, the steps for using and replacing the device are relatively cumbersome, which is not conducive to subsequent maintenance and replacement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a via device.

[0004] According to the embodiment of the utility model, the through-hole device includes: a top plate, the top plate is provided with a first mounting hole; a bottom plate, the bottom plate is provided with a second mounting hole and a first avoidance groove, the first avoidance groove is connected with the first mounting hole and extends to the edge of the bottom plate; an elastomer, the elastomer is clamped between the top plate and the bottom plate, the elastomer is provided with a wire-passing hole, and the elastomer is provided with a second avoidance groove, the second avoidance groove is connected with the wire-passing hole and extends to the edge of the elastomer; wherein the axis of the first mounting hole, the axis of the second mounting hole and the axis of the wire-passing hole coincide; a clamping device, the clamping device includes a first end and a second end, the top plate and the bottom plate are located between the first end and the second end, and the distance between the first end and the second end is adjustable so that the top plate and the bottom plate press the elastomer to deform the elastomer so that the surrounding wall of the wire-passing hole hugs the wiring harness.

[0005] According to the through-hole device of the embodiment of the utility model, the distance between the top plate and the bottom plate is adjusted by setting a clamping device, and the elastomer set between the top plate and the bottom plate is deformed as the distance is adjusted. When the distance is reduced, the top plate and the bottom plate squeeze the elastomer from the upper and lower directions of the elastomer, and the elastomer is deformed and expanded until the elastomer and the through-hole of the device sealed by the through-hole device are tightly fitted, thereby achieving a sealing effect. At the same time, a wire hole is provided inside the elastomer, and the wire harness can pass through the wire hole. When the elastomer is deformed and expanded, the peripheral wall of the wire hole fits with the outer wall of the wire harness to tightly hold the wire harness, thereby achieving sealing at the wire hole and preventing moisture from leaking from the wire hole and causing short circuit damage to the internal electrical components of the device. The bottom plate and the elastomer are also provided with avoidance grooves for the wire harness to be installed and disassembled from the avoidance grooves, thereby facilitating the replacement of the wire harness. The through-hole device can achieve the sealing of the through-hole and the disassembly of the through-hole device by operating the clamping device, and its operation is simple and easy to use.

[0006] According to some embodiments of the present invention, the first mounting hole, the second mounting hole and the wire passing hole are opposite to each other to form a through hole, and there are multiple through holes.

[0007] According to some embodiments of the present invention, the through hole includes a first through hole and a second through hole, and the first through hole and the second through hole have different apertures.

[0008] According to some embodiments of the present invention, the first avoidance groove and the second avoidance groove are connected to form a through groove, and the first through hole and the second through hole are both connected to the through groove.

[0009] According to some embodiments of the present utility model, the clamping device includes a screw rod and a nut, and the screw rod and the nut are threadably matched so that the top plate and the bottom plate are clamped between the head of the screw rod and the nut.

[0010] According to some embodiments of the utility model, the head of the screw is fixedly connected to the bottom plate, the screw passes through the elastomer and the top plate in sequence from the bottom plate, and the nut is threadedly connected to the protruding end of the screw.

[0011] According to some embodiments of the present invention, the bottom plate includes a plurality of sub-bottom plates, the plurality of sub-bottom plates together constitute the bottom plate, and the joint between two adjacent sub-bottom plates forms the first avoidance groove.

[0012] According to some embodiments of the present invention, a notch is provided on the edge of at least one of the sub-base plates and is open toward another of the sub-base plates, so as to form the second mounting hole at the joint of two adjacent sub-base plates.

[0013] According to some embodiments of the utility model, there are a plurality of the clamping devices, and the plurality of the clamping devices are evenly spaced along the circumference of the through-hole device, and a plurality of the screw rods are arranged on each of the sub-base plates.

[0014] According to some embodiments of the utility model, a sealing ring is further provided, which is sleeved on the screw and located between the nut and the top plate.

[0015] Compared with the via devices in the prior art that have a complex structure and are not suitable for sealing holes of different diameters, the present application provides a via device, which specifically includes: an elastomer is arranged between the top plate and the bottom plate, and a clamping device is arranged at both ends of the top plate and the bottom plate to shorten the distance between the top plate and the bottom plate, so that the top plate and the bottom plate clamp the elastomer, and the elastomer is deformed under pressure so that its outer side fits the via of the sealed device, and the peripheral wall of the wire hole arranged inside the elastomer surrounds the wire harness to achieve the sealing of the via and the wire hole. The avoidance grooves arranged on the bottom plate and the elastomer facilitate the disassembly and installation of the wire harness. The via device of the present application can realize the disassembly of the via device by adjusting the distance between the top plate and the bottom plate through the clamping device, and the replacement of the wire harness is facilitated by the avoidance groove. It has a simple structure, is easy to operate, and has a good sealing effect.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is an overall schematic diagram of a via device according to some embodiments of the utility model;

[0019] Figure 2 is a schematic diagram of the structure of a via device according to some embodiments of the utility model;

[0020] Figure 3 is a top view of a via device according to some embodiments of the utility model;

[0021] Figure 4 is a top view of a via device after being compressed according to some embodiments of the utility model;

[0022] Figure 5 is a front view of a via device according to some embodiments of the utility model;

[0023] Figure 6 It is a front view of the via device after being compressed according to some embodiments of the utility model.

[0024] Reference numerals:

[0025] Via device 100;

[0026] Top plate 1; first mounting hole 10; bottom plate 2; second mounting hole 20; first avoidance groove 21; elastic body 3; wire hole 30; second avoidance groove 31; clamping device 4; screw rod 41; nut 42;

[0027] Through hole 5; through groove 6; sub-base plate 7; notch 70; sealing ring 8. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] Reference below Figure 1-Figure 6 A via device 100 according to an embodiment of the present invention is described.

[0030] like Figure 1 and Figure 5 As shown, the through-hole device 100 according to the embodiment of the utility model comprises: a top plate 1, a bottom plate 2, an elastic body 3 and a clamping device 4. Among them, the top plate 1 is provided with a first mounting hole 10, and the wiring harness can pass through the first mounting hole 10. The bottom plate 2 is provided with a second mounting hole 20 and a first avoidance groove 21, the first avoidance groove 21 is connected with the first mounting hole 10 and extends to the edge of the bottom plate 2, the wiring harness can be installed into the second mounting hole 20 along the radial direction of the second mounting hole 20 through the first avoidance groove 21, and the wiring harness can pass through the second mounting hole 20.

[0031] like Figure 1 and Figure 2 As shown, the elastomer 3 is clamped between the top plate 1 and the bottom plate 2, the elastomer 3 is provided with a wire hole 30, and the elastomer 3 is provided with a second avoidance groove 31, the second avoidance groove 31 is connected with the wire hole 30 and extends to the edge of the elastomer 3; wherein, the axis of the first mounting hole 10, the axis of the second mounting hole 20 and the axis of the wire hole 30 coincide.

[0032] It can be seen that the first mounting hole 10, the second mounting hole 20 and the wire-passing hole 30 are directly connected to allow the wiring harness to pass from the bottom plate 2 to one end of the top plate 1, and the first avoidance groove 21 and the second avoidance groove 31 located on the bottom plate 2 and the elastomer 3 are respectively connected to the second mounting hole 20 and the wire-passing hole 30. The wiring harness can be moved into the wire-passing hole 30 through the first avoidance groove 21 and the second avoidance groove 31 and be wrapped by the elastomer 3 without having to pass through the first mounting hole 10, the wire-passing hole 30 and the second mounting hole 20 to realize the wiring harness. This simplifies the installation steps of the wiring harness and reduces the use cost of the through-hole device 100.

[0033] like Figure 1 and Figure 2 As shown, the pressing device 4 includes a first end and a second end, the top plate 1 and the bottom plate 2 are located between the first end and the second end, and the distance between the first end and the second end is adjustable so that the top plate 1 and the bottom plate 2 press the elastic body 3, as shown in FIG. Figure 4 and Figure 6 As shown, the elastic body 3 is deformed under pressure and expands outward, fitting the inner wall of the through hole of the device sealed by the through hole device 100, and at the same time, the peripheral wall of the through hole 30 inside the elastic body 3 holds the wire harness tightly. Thus, the through hole device 100 seals the through hole of the device and the through hole 30 for the wire harness to pass through, and has a good sealing effect.

[0034] According to some embodiments of the present invention, the first mounting hole 10 , the second mounting hole 20 and the wire-passing hole 30 are opposite to each other to form a through hole 5 , and there are multiple through holes 5 .

[0035] According to some embodiments of the present invention, Figure 1 As shown, the number of through holes 5 is set to three, and the three through holes 5 are evenly spaced along the circumference of the through hole device 100. Therefore, through the above arrangement, when the elastic body 3 is pressed by the top plate 1 and the side plate, the same or similar deformation amount is generated at each through hole 5, so that the sealing effect of each through hole 5 is consistent, and it is avoided that the sealing effect of different through holes 5 is too different due to the inconsistent deformation of each through hole 5 of the elastic body 3 due to pressure, so that some through holes 5 cannot fit the outer wall of the wiring harness due to too small deformation of the elastic body 3, resulting in gaps, affecting the sealing effect.

[0036] According to some embodiments of the present invention, Figure 1 As shown, the through hole 5 includes a first through hole and a second through hole, and the apertures of the first through hole and the second through hole are different. Through holes 5 with different apertures can be applied to wire harnesses with different radii. At the same time, by setting through holes 5 with different apertures, the classification of wire harnesses can also be achieved, which is convenient for operators to identify the types of wire harnesses. For example, the positive and negative poles of the high-voltage wire pass through the larger through hole 5, and the positive and negative poles of the low-voltage wire pass through the smaller through hole 5. In this way, the risk of errors when disassembling and replacing the wire harness is reduced.

[0037] According to some embodiments of the present invention, Figure 2 and Figure 4 As shown, the first avoidance groove 21 and the second avoidance groove 31 are connected to each other to form a through groove 6, and the through groove 6 is connected to each through hole 5 on the through hole device 100. When the user needs to change the number, size or position of the wiring harness, the wiring harness can be changed without disassembling the through hole device 100 through the through groove 6 connected to each through hole 5. For example, a new wiring harness can be added to the through hole 5 or the original wiring harness in the through hole 5 can be taken out through the through groove 6, and the position of the wiring harness between the through holes 5 can also be changed through the through groove 6, so that the later replacement and maintenance operation of the through hole device 100 is more convenient.

[0038] According to some embodiments of the present invention, Figure 2 As shown, the clamping device 4 includes a screw rod 41 and a nut 42, and the screw rod 41 and the nut 42 are threadedly matched so that the top plate 1 and the bottom plate 2 are clamped between the head of the screw rod 41 and the nut 42. The nut 42 is screwed to move the nut 42 along the axial direction of the screw rod 41, thereby shortening the distance between the top plate 1 and the bottom plate 2, so that the elastic body 3 is compressed and deformed to fit the outer wall of the wiring harness and the peripheral wall of the through hole to achieve sealing.

[0039] According to some embodiments of the present invention, Figure 2 As shown, the head of the screw 41 is fixedly connected to the bottom plate 2, the screw 41 passes through the elastic body 3 and the top plate 1 in sequence from the bottom plate 2, and the nut 42 is threadedly connected to the extended end of the screw 41. In this way, the composition of the through-hole device 100 is simplified, the screw 41 passing through the elastic body 3 can support the elastic body 3 and limit the displacement of the elastic body 3 along the radial direction of the through-hole device 100, and the extended screw 41 facilitates the matching and positioning of the top plate 1 and the bottom plate 2.

[0040] It should be noted that, in some embodiments of the present invention, the bottom plate 2 and the screw rod 41 are welded.

[0041] According to some embodiments of the utility model, the bottom plate 2 includes multiple sub-bottom plates 7, and the multiple sub-bottom plates 7 together constitute the bottom plate 2. The size and shape of the sub-bottom plates 7 can be set by themselves, so that the multiple sub-bottom plates 7 can be spliced ​​into a complete bottom plate 2 corresponding to the top plate 1.

[0042] In some specific examples of the present invention, Figure 2 As shown, the bottom plate 2 is composed of three fan-shaped sub-bottom plates 7. The sub-bottom plates 7 can share the pressure of the threaded connection and enhance the structural stability of the through-hole device 100. The joint of two adjacent sub-bottom plates 7 forms a first avoidance groove 21, which is convenient for removing the wire harness from the bottom plate 2.

[0043] According to some embodiments of the present invention, Figure 2As shown, a notch 70 is provided on the edge of at least one sub-base plate 7 and is open toward another sub-base plate 7, so as to form a second mounting hole 20 at the joint of two adjacent sub-base plates 7. The wiring harness is placed in the second mounting hole 20, and when the through-hole device 100 is disassembled, only one sub-base plate 7 needs to be disassembled, and the wiring harness can be easily taken out from the base plate 2, so that the wiring harness can be replaced.

[0044] In some specific examples of the present invention, Figure 2 As shown, the arc edges of the three fan-shaped sub-bottom plates 7 are all provided with semicircular notches 70, and at the joint of the adjacent sub-bottom plates 7, two semicircular notches 70 form the second mounting hole 20 on the bottom plate 2. It should be noted that, in some embodiments, the size of the notch 70 of the sub-bottom plate 7 can be set as long as it can form the second mounting hole 20 at the joint of the notches 70 of multiple sub-bottom plates 7.

[0045] According to some embodiments of the present invention, there are multiple clamping devices 4, and the multiple clamping devices 4 are evenly spaced along the circumference of the through-hole device 100, and each sub-base plate 7 is provided with multiple screws 41. Figure 1 As shown, by providing a plurality of clamping devices 4, the total pressure on the elastic body 3 is increased, so that the elastic body 3 produces a greater deformation, so that the through-hole device 100 is suitable for sealing through-holes with a larger size range. The plurality of clamping devices 4 are evenly spaced along the circumference of the through-hole device 100 to balance the deformation of the elastic body 3 at various locations, ensure that the deformation of the elastic body 3 along its radial direction is evenly distributed, and avoid the uneven deformation of the elastic body 3 at various locations due to uneven pressure, which affects the sealing effect of the through-hole device 100.

[0046] In some embodiments of the utility model, the bottom plate 2 of the through-hole device 100 is composed of three fan-shaped sub-bottom plates 7 of the same structure, and three studs are arranged on each fan-shaped sub-bottom plate 7, that is, nine studs are arranged on the entire bottom plate 2. Therefore, the through-hole device 100 of this embodiment is provided with nine clamping devices 4, and the nine clamping devices 4 are evenly arranged along the circumferential direction, and are symmetrical about the central axis of the through-hole device 100 passing through the center point of the through-hole 5, so that the pressure at each through-hole 5 and the deformation of the elastic body 3 at the through-hole 5 are also symmetrical along the above central axis, ensuring the consistency of the sealing at each through-hole 5.

[0047] According to some embodiments of the utility model, the through-hole device 100 is further provided with a sealing ring 8, which is sleeved on the screw 41 and located between the nut 42 and the top plate 1. The sealing ring 8 is suitable for withstanding the extrusion of the nut 42 and the top plate 1, thereby sealing the opening through which the screw 41 passes, isolating it from the external environment, and further enhancing the sealing effect of the through-hole device 100.

[0048] It should be noted that the elastic body 3 of the via device 100 is a compressible insulating fireproof material, such as fluororubber, to achieve a better sealing effect, avoid the heating of the wiring harness causing the via device 100 to catch fire at high temperature, and reduce safety risks.

[0049] It should be noted that the via device 100 of the utility model can be widely used in various types of equipment that require via sealing, such as temperature boxes and high-voltage electrical cabinets. The via device 100 can seal the external vias of the temperature box and the high-voltage electrical cabinet and seal the wiring harness connecting the inside and outside of the equipment through the vias, preventing external moisture from entering the equipment and ensuring the stability of the internal test environment of the equipment. Improve the accuracy of the test results; when the circuit in the equipment is short-circuited, the wiring harness will heat up and cause high temperature at the via hole. The elastomer 3 made of insulating fireproof material can effectively reduce the risk of fire.

[0050] The through-hole device 100 of the utility model adjusts the distance between the top plate 1 and the bottom plate 2 by the pressing device 4. When the nut 42 is tightened, the pressing device 4 applies pressure to the top plate 1 and the bottom plate 2, so that the top plate 1 and the bottom plate 2 are suitable for squeezing the elastic body 3. The elastic body 3 is made of a compressible material and deforms when it is pressed. Figure 4 and Figure 6 As shown, the elastic body 3 is caused to expand outward, and the elastic body 3 expands to the outer wall of the external device via hole and is squeezed and fitted therewith, thereby achieving sealing of the external device via hole.

[0051] The top plate 1, the bottom plate 2 and the elastic body 3 of the through-hole device 100 of the present invention are respectively provided with a first mounting hole 10, a second mounting hole 20 and a through-hole 30. The axis of the first mounting hole 10, the axis of the second mounting hole 20 and the axis of the through-hole 30 are aligned to form a through-hole 5. The wiring harness passes through the through-hole 5 from the inside of the device to contact the external environment. Figure 3 and Figure 4 As shown, when the elastic body 3 of the through-hole device 100 is pressurized, the through-hole 30 is deformed by the elastic body 3 so that the peripheral wall of the through-hole 30 fits with the outer wall of the wire harness until the wire harness is tightly embraced. In this way, the through-hole device 100 seals the through-hole 5.

[0052] Taking into account that during the actual use of the through-hole device 100, the size, quantity and position of the wiring harness may be adjusted and replaced according to the needs of the user, in order to facilitate the adjustment and replacement of the wiring harness, the base plate 2 of the through-hole device 100 of the utility model is composed of multiple identical fan-shaped sub-base plates 7, and the joints of adjacent sub-base plates 7 form a first avoidance groove 21, which is connected to the second mounting hole 20 and extends to the edge of the sub-base plate 7. In addition, a second avoidance groove 31 is opened on the elastomer 3, and the second avoidance groove 31 is connected to the wire hole 30 and extends to the edge of the elastomer 3. When the user of the through-hole device 100 needs to adjust the wiring harness or disassemble the through-hole device 100, he only needs to adjust the clamping device 4 to loosen the connection of the screw 41, and the elastomer 3 will automatically restore its original shape. At this time, the through-hole device 100 is taken out from the through-hole, and the user can directly take out the wiring harness for replacement through the first avoidance groove 21 connected to the second mounting hole 20 and the second avoidance groove 31 connected to the wire hole 30, eliminating the existing cumbersome steps of disassembling the through-hole device 100 before replacing the wiring harness and reinstalling it.

[0053] Thus, the through-hole device 100 of the utility model can be suitable for sealing through-holes with different apertures within a certain range through the compression deformation of the elastic body 3. At the same time, the through-hole device 100 not only seals the through-holes of external devices, but also seals the through-holes 30, and has a good sealing effect. In addition, a plurality of through-holes 30 with different apertures can be provided on the elastic body 3, and the wiring harness can be classified according to the aperture size of the through-holes through which the wiring harness passes, which facilitates the user to identify the type of wiring harness, and increases the safety of the use of the through-hole device 100.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A via device, characterized in that: include: A top plate, wherein the top plate is provided with a first mounting hole; A bottom plate, wherein the bottom plate is provided with a second mounting hole and a first avoidance groove, wherein the first avoidance groove is communicated with the first mounting hole and extends to an edge of the bottom plate; An elastic body, the elastic body is clamped between the top plate and the bottom plate, the elastic body is provided with a wire passing hole, and the elastic body is provided with a second avoidance groove, the second avoidance groove is communicated with the wire passing hole and extends to the edge of the elastic body; Wherein, the axis of the first mounting hole, the axis of the second mounting hole and the axis of the wire passing hole coincide with each other; A clamping device, the clamping device includes a first end and a second end, the top plate and the bottom plate are located between the first end and the second end, and the distance between the first end and the second end is adjustable so that the top plate and the bottom plate can clamp the elastomer to deform the elastomer so that the surrounding wall of the wire hole can hold the wire harness tightly.

2. The via device according to claim 1, characterized in that: The first mounting hole, the second mounting hole and the wire passing hole are opposite to each other to form a through hole, and there are multiple through holes.

3. The via device according to claim 2, characterized in that: The through holes include a first through hole and a second through hole, and the first through hole and the second through hole have different hole diameters.

4. The via device according to claim 3, characterized in that: The first avoidance groove and the second avoidance groove are communicated with each other to form a passing groove, and the first through hole and the second through hole are both communicated with the passing groove.

5. The via device according to claim 1, characterized in that: The pressing device comprises a screw rod and a nut, wherein the screw rod and the nut are threadably matched so that the top plate and the bottom plate are clamped between the head of the screw rod and the nut.

6. The via device according to claim 5, characterized in that: The head of the screw is fixedly connected to the bottom plate, the screw passes through the elastic body and the top plate in sequence from the bottom plate, and the nut is threadedly connected to the protruding end of the screw.

7. The via device according to claim 6, characterized in that: The bottom plate includes a plurality of sub-bottom plates, and the plurality of sub-bottom plates together constitute the bottom plate, and the joint of two adjacent sub-bottom plates forms the first avoidance groove.

8. The via device according to claim 7, characterized in that: A notch is provided on the edge of at least one of the sub-base plates and is open toward the other sub-base plate, so as to form the second mounting hole at the joint of two adjacent sub-base plates.

9. The via device according to claim 7, characterized in that: There are a plurality of the clamping devices, and the plurality of the clamping devices are evenly spaced along the circumference of the through-hole device, and a plurality of the screw rods are arranged on each of the sub-base plates.

10. The via device according to claim 6, characterized in that: A sealing ring is also provided, which is sleeved on the screw and located between the nut and the top plate.

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