Testing tool

Abstract

The utility model provides a test tool, relates to the technical field of sealing test, and can test the sealing performance of a sealant after stretching. The testing tool comprises a first fixing piece, a second fixing piece and a cover plate. The first fixing piece is provided with a first bonding surface. The second fixing piece is of a hollow structure, and a containing cavity is formed in the second fixing piece. And one end of the second fixing piece is a second bonding surface. The second bonding surface is used for being arranged opposite to the first bonding surface and bonded with the first bonding surface through sealant, so that the first fixing piece blocks the opening in one end of the containing cavity. The cover plate covers the side, away from the first fixing piece, of the second fixing piece and blocks the opening in the other end of the containing cavity. The cover plate is connected with the second fixing piece. The test tool can test the tensile sealing performance of the sealant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing test, in particular to a test tool. BACKGROUND

[0002] With the continuous progress of technology and the continuous improvement of living standards, cars have become the main means of transportation for daily families. Among them, electric vehicles have gradually become the mainstream choice of people due to their advantages of no pollution, low cost, beautiful appearance, and high degree of intelligence. In electric vehicles, the battery is the source of power driving, which converts electrical energy into mechanical energy to realize the driving of the vehicle.

[0003] Generally, the power battery is arranged in the battery box, and the battery box generally includes a bottom plate and a frame. The frame is arranged on one side of the bottom plate and surrounds the bottom plate. In order to ensure the sealing performance of the battery box, a sealant is generally arranged between the bottom plate and the frame to ensure the sealing performance of the connection between the bottom plate and the frame. In actual application, the bottom plate may be scratched by external objects, and relative displacement may occur between the bottom plate and the frame, so that the sealant deforms. In order to ensure the sealing performance, the sealant needs to have good sealing performance, and the sealing performance can be ensured after the sealant is stretched. However, there is no test tool for testing the sealing performance of the sealant after stretching, and the sealing performance of the sealant after stretching cannot be known. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a test tool, which can test the sealing performance of the sealant after stretching.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a test tool for testing the stretching sealing performance of the sealant. The test tool includes a first fixing part, a second fixing part and a cover plate. The first fixing part has a first bonding surface. The second fixing part is a hollow structure, and an accommodating cavity is formed inside. One end of the second fixing part is a second bonding surface. The second bonding surface is arranged opposite to the first bonding surface and is bonded by the sealant, so that the first fixing part blocks the opening at one end of the accommodating cavity. The cover plate is arranged on the side of the second fixing part away from the first fixing part, and blocks the opening at the other end of the accommodating cavity. The cover plate is connected with the second fixing part.

[0007] According to the technical means, the test tool can bond the first bonding surface and the second bonding surface to each other through the sealant. Meanwhile, the cover plate covers the opening of the other end of the accommodating cavity, and the cover plate and the first fixing member can seal the accommodating cavity. Thus, when the test tool is installed on the tensile testing machine, the tensile testing machine can be used to pull the cover plate, and the second fixing member can be pulled to move relative to the first fixing member, so that the sealant at the first bonding surface and the second bonding surface is stretched. Thus, when the sealant is stretched by the tensile testing machine, the pressure in the accommodating cavity can be measured, and the change of the pressure can be compared to determine whether the sealing effect in the accommodating cavity changes.

[0008] In a possible implementation, the second fixing member further has a venting opening in communication with the accommodating cavity. The venting opening is used to ventilate the accommodating cavity.

[0009] According to the technical means, a certain amount of gas can be introduced into the accommodating cavity through the venting opening, and the pressure in the accommodating cavity can be measured, so that the pressure in the accommodating cavity can be conveniently controlled.

[0010] In a possible implementation, the surface of the first fixing member near the second fixing member has a protruding portion. The protruding portion is annular. The surface of the protruding portion near the second fixing member is the first bonding surface.

[0011] According to the technical means, the protruding portion in the surface of the first fixing member near the second fixing member can be protruded relative to other positions, and the protruding portion can provide a bonding position for the sealant, so that the bonding position can be conveniently determined. After the bonding is completed, the excess sealant can be conveniently scraped off, and the sealant around the protruding portion can be scraped off.

[0012] In a possible implementation, the second fixing member includes a mounting portion and a main body portion. The mounting portion is annular and connected to the cover plate. The cover plate covers the inner ring of the mounting portion. The main body portion is located on the side of the mounting portion away from the cover plate and is arranged around the periphery of the inner ring of the mounting portion. The main body portion surrounds the accommodating cavity. The end face of the main body portion away from the mounting portion is the second bonding surface. The test tool further includes a plurality of limiting members. The plurality of limiting members are located around the protruding portion. The plurality of limiting members are arranged at intervals along the circumferential direction of the protruding portion. One end of each limiting member is connected to the first fixing member, and the other end of each limiting member is overlapped with the mounting portion. When the mounting portion is overlapped with the limiting members, the second bonding surface is arranged opposite to the first bonding surface.

[0013] According to the above technical means, when the second fixing member is overlapped on the limiting member, there is a gap between the first bonding surface and the second bonding surface, which can better control the compression amount of the sealant, avoid excessive compression of the sealant after bonding, and prevent the sealant from being unable to stretch normally, thereby affecting the subsequent test of the sealing performance.

[0014] In a possible implementation, the mounting portion is provided with a avoiding hole, and the peripheral wall of the limiting member forms a limiting portion. One end of the limiting member is arranged in the avoiding hole. The limiting portion is located on the side of the mounting portion close to the main body portion and abuts against the mounting portion.

[0015] According to the above technical means, the abutment between the limiting portion and the mounting portion can prevent the mounting portion from sliding along the extension direction of the limiting member, thereby achieving the limiting effect and realizing the overlapping between the second fixing member and the limiting member, which is simple and convenient.

[0016] In a possible implementation, the test tool further comprises a sealing assembly. The sealing assembly is located between the cover plate and the second fixing member and covers the opening at the other end of the containing cavity.

[0017] According to the above technical means, the sealing assembly arranged between the cover plate and the second fixing member can better seal the opening at the other end of the containing cavity, thereby ensuring the sealing performance at this position and making the test result of the sealing performance of the sealant after stretching more accurate.

[0018] In a possible implementation, the sealing assembly comprises a sealing cover. The sealing cover is located on the side of the cover plate close to the second fixing member and is connected with the cover plate. The sealing cover is used to cover the opening at the other end of the containing cavity.

[0019] According to the above technical means, the sealing cover can cover the opening at the other end of the containing cavity, so that the containing cavity is in a sealed state. At the same time, since the cover plate will be stretched under the action of the stretching testing machine, a gap may be formed between the cover plate and the second fixing member due to stretching. At this time, the sealing cover can ensure that the opening at the other end of the containing cavity is always covered when the cover plate is stretched.

[0020] In a possible implementation, the end of the second fixing member away from the first fixing member is formed with a clamping portion. The clamping portion is arranged around the periphery of the opening at the other end of the containing cavity and has a gap with the opening at the other end of the containing cavity. The sealing assembly further comprises a sealing ring. The sealing ring is arranged on the inner side of the clamping portion.

[0021] According to the above technical means, the clamping portion arranged around the periphery of the sealing ring can limit the position of the sealing ring, thereby preventing the sealing ring from moving and failing to seal. At the same time, the sealing ring can better seal the opening at the other end of the containing cavity, thereby ensuring the sealing effect.

[0022] In a possible implementation, the width of the sealing ring is less than the interval between the clamping portion and the opening of the other end of the accommodating cavity along the radial direction of the opening of the other end of the accommodating cavity. The thickness of the sealing ring is greater than the height of the clamping portion along the direction perpendicular to the plane where the opening is located.

[0023] According to the technical means, the sealing ring can be compressed when the cover plate and the sealing plate cover the second fixing member, so that the sealing ring is compressed to abut against the clamping portion, and the sealing ring in the compressed state can better play a sealing effect.

[0024] In a possible implementation, the sealing assembly further includes a fastener. The fastener penetrates the cover plate and the sealing cover in sequence and extends into the clamping portion and is threadedly connected with the clamping portion.

[0025] According to the technical means, the fastener can be arranged to connect the different components together, and the connection is more firm and reliable.

[0026] In a possible implementation, the test tool further includes a lower stretching disc. The lower stretching disc is located on the side of the first fixing member away from the second fixing member and is connected with the first fixing member.

[0027] According to the technical means, the first fixing member can be fixed to the stretching testing machine through the lower stretching disc. Meanwhile, the stretching testing machine can pull the lower stretching disc, so as to better stretch the sealant.

[0028] In a possible implementation, the cover plate can be an upper stretching disc.

[0029] According to the technical means, the second fixing member can be directly fixed to the stretching testing machine through the upper stretching disc, and the fixing is more convenient. SUMMARY

[0030] Figure 1 A structural schematic diagram of a test tool provided by an embodiment of the present application is shown in the figure;

[0031] Figure 2 An exploded view of a test tool provided by an embodiment of the present application is shown in the figure;

[0032] Figure 3 One of the exploded views of part of the structure of a test tool provided by an embodiment of the present application is shown in the figure;

[0033] Figure 4 The second exploded view of part of the structure of a test tool provided by an embodiment of the present application is shown in the figure.

[0034] Explanation of reference signs:

[0035] 100 - test tool; 10 - first fixing member; 101 - mounting hole; 11 - protruding part; 111 - first bonding surface; 12 - leg; 20 - second fixing member; 21 - mounting part; 211 - avoiding hole; 212 - clamping part; 213 - positioning column; 22 - main body part; 221 - air vent; 30 - upper stretching disc; 301 - positioning hole; 31 - upper stretching column; 40 - limiting member; 41 - limiting part; 50 - sealing assembly; 51 - sealing cover; 52 - sealing ring; 60 - lower stretching disc; 61 - lower stretching column; 200 - sealant; 300 - air nozzle. DETAILED DESCRIPTION

[0036] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.

[0037] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0038] The embodiments of the present application provide a test tool, which can be used to test the stretch sealing performance of sealant. As shown in Figure 1 Figure 1 A structural schematic diagram of a test tool 100 provided by the embodiments of the present application is shown, the sealing tool can include a first fixing member 10, a second fixing member 20 and a cover plate 30. Wherein, the cover plate 30 can be connected with a stretching testing machine, and the cover plate 30 is pulled by the stretching testing machine.

[0039] In some embodiments, the cover plate 30 can be an upper stretching disc, as shown in Figure 1 One side of the cover plate 30 can be formed with an upper stretching column 31, and the upper stretching column 31 can be used to connect with the stretching testing machine, and the stretching testing machine can pull the cover plate 30 through the upper stretching column 31.

[0040] As shown in Figure 2 Figure 2 ​​An exploded view of the test tool 100 is provided in the embodiments of the present application. The first fixing member 10 has a first bonding surface 111. The second fixing member 20 is a hollow structure, and has an accommodating cavity formed inside. One end of the second fixing member 20 is a second bonding surface (not shown in the figure). The second bonding surface is arranged opposite to the first bonding surface 111, and is bonded to the first bonding surface 111 by the sealing glue 200, so that the first fixing member 10 seals the opening at one end of the accommodating cavity.

[0041] As shown in Figure 1 and Figure 2 , the cover plate 30 is arranged on the side of the second fixing member 20 away from the first fixing member 10, and seals the opening at the other end of the accommodating cavity. The cover plate 30 is connected to the second fixing member 20. In this way, the cover plate 30 and the first fixing member 10 can seal the accommodating cavity of the second fixing member 20, and the sealing glue 200 can seal the first bonding surface 111 and the second bonding surface, so as to ensure the sealing effect of the accommodating cavity.

[0042] Therefore, the test tool 100 provided in the embodiments of the present application can bond the first bonding surface 111 and the second bonding surface to each other by the sealing glue 200. At the same time, the cover plate 30 is arranged on the side of the second fixing member 20 away from the first fixing member 10, and seals the opening at the other end of the accommodating cavity. The cover plate 30 and the first fixing member 10 can seal the accommodating cavity. In this way, when the test tool 100 is installed on the tensile testing machine, the tensile testing machine can be used to pull the cover plate 30. Since the cover plate 30 is connected to the second fixing member 20, the second fixing member 20 can be moved relative to the first fixing member 10, so that the sealing glue 200 at the first bonding surface 111 and the second bonding surface is stretched. In this way, when the sealing glue 200 is stretched by the tensile testing machine, the pressure in the accommodating cavity can be tested, and the change in the pressure can be compared to determine whether the sealing effect in the accommodating cavity changes.

[0043] It can be understood that when the sealing performance of the sealing glue 200 after stretching is good, the pressure in the accommodating cavity before and after stretching of the sealing glue 200 is approximately equal. Conversely, when the sealing performance of the sealing glue 200 after stretching is poor, there is a certain difference between the pressure in the accommodating cavity before and after stretching of the sealing glue 200.

[0044] In addition, it can be understood that a device capable of testing the change in pressure can be used to measure the pressure in the accommodating cavity. For example, an air pressure sensor can be used to test the air pressure in the accommodating cavity.

[0045] In some embodiments, as shown in Figure 2As shown, the second fixing member 20 is also provided with a vent hole 221 which is in communication with the accommodating cavity, and the vent hole 221 is used for introducing gas into the accommodating cavity. The gas nozzle 300 can be threadedly connected to the vent hole 221, and the gas can be sprayed into the vent hole 221 through the gas nozzle 300. In this way, a certain amount of gas can be introduced into the accommodating cavity through the vent hole, and the pressure in the accommodating cavity can be measured, so as to facilitate the control of the pressure in the accommodating cavity.

[0046] Of course, in other embodiments, the second fixing member 20 can also not be provided with the communication hole 221. At this time, the tensile property of the sealant 200 can be determined by directly measuring the pressure change in the accommodating cavity. At this time, the device for measuring the pressure can be arranged in the accommodating cavity, and the device can include a wireless communication module, and the pressure information can be transmitted through wireless communication.

[0047] In some embodiments, as shown in Figure 2 As shown, the surface of the first fixing member 10 close to the second fixing member 20 is provided with a protruding part 11. The protruding part 11 is annular. The surface of the protruding part 11 close to the second fixing member 20 is a first bonding surface 111. In this way, the protruding part 11 on the surface of the first fixing member 10 close to the second fixing member 20 can be protruded relative to other positions, and the protruding part 11 can provide a bonding position for the sealant 200, so as to facilitate the determination of the bonding position. Meanwhile, after the bonding is completed, the excess sealant 200 can be more conveniently scraped off, and the sealant 200 around the protruding part 11 can be scraped off.

[0048] The shape and size of the protruding part 11 can be designed according to actual conditions. For example, as shown in Figure 2 As shown, the second fixing member 20 forms a cylindrical accommodating cavity with a certain thickness. Therefore, the shape of the protruding part 11 can be annular. Meanwhile, the inner diameter of the protruding part 11 can be smaller than the diameter of the opening of the accommodating cavity formed by the second fixing member 20, and the outer diameter of the protruding part 11 can be larger than the diameter of the annular outer wall of the second fixing member. In this way, the second fixing member 20 can be better overlapped on the protruding part 11, and the protruding part 11 can cover the opening of the accommodating cavity.

[0049] Of course, in other embodiments, the surface of the first fixing member 10 close to the second fixing member 20 can also not be provided with the protruding part 11. At this time, the second fixing member 20 can be directly arranged on the surface of the first fixing member 10 close to the second fixing member 20, and the sealant 200 can also be used to achieve the bonding. Whether the protruding part 11 is arranged or not can be selected according to actual conditions.

[0050] As shown in Figure 3 As shown in Figure 3This is one of the exploded views of a portion of the structure of the test fixture 100 provided in an embodiment of this application. The second fastener 20 may include a mounting portion 21 and a main body portion 22. The mounting portion 21 is annular and connected to a cover plate 30. The cover plate 30 covers the inner ring of the mounting portion 21. The main body portion 22 is located on the side of the mounting portion 21 away from the cover plate 30 and is disposed around the periphery of the inner ring of the mounting portion 21. The main body portion 22 forms a receiving cavity. The end face of the main body portion 22 away from the mounting portion 21 is a second adhesive surface.

[0051] At the same time, such as Figure 1 and Figure 4 As shown, Figure 4 This is a second exploded view of a portion of the structure of the test fixture 100 provided in this application embodiment. The test fixture 100 also includes a plurality of limiting members 40. The plurality of limiting members 40 are located on the periphery of the protrusion 11. The plurality of limiting members 40 are spaced apart along the circumference of the protrusion 11.

[0052] One end of the limiting member 40 is connected to the first fixing member 10, and the other end overlaps with the mounting part 21. When the mounting part 21 overlaps with the limiting member 40, the second adhesive surface and the first adhesive surface 111 are spaced apart. Therefore, when the second fixing member 20 overlaps with the limiting member 40, there is a gap between the first adhesive surface 111 and the second adhesive surface, which can better control the compression of the sealant 200 and avoid excessive compression of the sealant 200 after bonding, which would prevent the sealant 200 from being stretched properly and affect the subsequent tensile sealing performance test.

[0053] It is understood that the first fixing member 10 and the limiting member 40 can be connected in different ways. For example, such as... Figure 2 As shown, the first fixing member 10 may have a mounting hole 101. The limiting member 40 may be located inside the mounting hole 101 and threadedly connected to the mounting hole 101. In this way, the limiting member 40 can be firmly connected to the first fixing member 10.

[0054] To achieve the overlap between the limiting member 40 and the second fixing member 20. In some embodiments, such as Figure 2 As shown, the mounting portion 21 has a clearance hole 211, and the peripheral wall of the limiting member 40 forms a limiting portion 41. One end of the limiting member 40 passes through the clearance hole 211. The limiting portion 41 is located on the side of the mounting portion 21 closer to the main body portion 22 and abuts against the mounting portion 21.

[0055] By abutting between the limiting part 41 and the mounting part 21, the mounting part 21 can be prevented from sliding along the extending direction of the limiting part 40, thereby playing a limiting role, realizing the lapping between the second fixing part 20 and the limiting part 40, and being simple and convenient in structure. Of course, in other embodiments, the lapping between the limiting part 40 and the second fixing part 20 can also be realized by other ways. For example, a protrusion can be arranged on the mounting part 21. Correspondingly, a groove can be formed on the limiting part 40. At this time, the lapping between the second fixing part 20 and the limiting part 40 can also be realized by the cooperation of the groove and the protrusion.

[0056] In some embodiments, as shown in Figure 2 The test tool 100 can further include a sealing assembly 50. The sealing assembly 50 is located between the cover plate 30 and the second fixing part 20, covering the opening at the other end of the accommodating cavity. Thus, by arranging the sealing assembly 50 between the cover plate 30 and the second fixing part 20, the opening at the other end of the accommodating cavity can be better sealed, ensuring the sealing performance at this position, so that the test result of the sealing performance of the sealant 200 after stretching is more accurate. Of course, in other embodiments, the cover plate 30 can also be directly arranged on the second fixing part, covering the opening at the other end of the accommodating cavity.

[0057] In some embodiments, as shown in Figure 2 The sealing assembly 50 includes a sealing cover 51. The sealing cover 51 is located on the side of the cover plate 30 close to the second fixing part 20 and is connected with the cover plate 30. The sealing cover 51 is used to cover the opening at the other end of the accommodating cavity. Thus, the sealing cover 51 can cover the opening at the other end of the accommodating cavity, so that the accommodating cavity is in a sealed state. At the same time, since the cover plate 30 will be stretched under the action of the tensile testing machine, a gap may occur between the cover plate 30 and the second fixing part 20 due to stretching. At this time, the sealing cover 51 can ensure that the opening at the other end of the accommodating cavity is always covered when the cover plate 30 is stretched.

[0058] The shape of the sealing cover 51 can be designed according to actual conditions. For example, as shown in Figure 2 The sealing cover 51 can be plate-shaped, and its shape can match the shape of the opening at the other end of the accommodating cavity, and its size can be larger than the size of the opening, so that the sealing ring 52 can better cover the opening at the other end of the accommodating cavity.

[0059] Continuing to refer to Figure 2 In some embodiments, an engaging part 212 can be formed on the end of the second fixing part 20 away from the first fixing part 10. The engaging part 212 is arranged around the periphery of the opening at the other end of the accommodating cavity and has a spacing with the opening at the other end of the accommodating cavity. The sealing assembly 50 further includes a sealing ring 52. The sealing ring 52 can be arranged on the inner side of the engaging part 212.

[0060] Thus, by arranging the clamping portion 212 on the periphery of the sealing ring 52, the position of the sealing ring 52 can be limited, so that the sealing ring 52 cannot move and cannot be sealed. At the same time, by arranging the sealing ring 52, the opening at the other end of the containing cavity can be better sealed, and the sealing effect can be ensured.

[0061] It can be understood that the material of the sealing ring 52 and the sealing plate can be selected according to actual conditions. For example, the sealing ring 52 and the sealing plate can be made of foam material.

[0062] In some embodiments, along the radial direction of the opening at the other end of the containing cavity, the width of the sealing ring 52 is less than the spacing between the clamping portion 212 and the opening at the other end of the containing cavity. Along the direction perpendicular to the plane where the opening is located, the thickness of the sealing ring 52 is greater than the height of the clamping portion 212. Thus, when the cover plate 30 and the sealing plate are covered on the second fixing member 20, the sealing ring 52 can be compressed, so that the sealing ring 52 is compressed to abut against the clamping portion 212, and the sealing ring 52 in the compressed state can better play a sealing effect.

[0063] In some embodiments, the sealing assembly 50 further comprises a fastener (not shown in the figure). The fastener penetrates the cover plate 30 and the sealing cover 51 in turn, and extends into the clamping portion 212 and is screwed with the clamping portion 212. Thus, by arranging the fastener, the above-mentioned different components can be connected together, and the connection is more firm and reliable.

[0064] In addition, as shown in Figure 3 In some embodiments, the side of the second fixing member 20 close to the cover plate 30 can be formed with a plurality of positioning columns 213. Correspondingly, the cover plate 30 can be formed with positioning holes 301. In this way, when the cover plate 30 is installed, the positioning columns 213 can be arranged in the positioning holes 301, and the cover plate 30 can be positioned, so that the subsequent installation is facilitated, and the installation is more convenient.

[0065] In some embodiments, as shown in Figure 2 The lower stretching disc 60 is located on the side of the first fixing member 10 away from the second fixing member 20 and is connected with the first fixing member 10. The lower stretching disc 60 can also be installed on the stretching testing machine. In this way, the first fixing member 10 can be fixed on the stretching testing machine through the lower stretching disc 60. At the same time, the stretching testing machine can pull the lower stretching disc 60, so that the sealant 200 can be better stretched.

[0066] Similarly, as shown in Figure 2 The side of the lower stretching disc 60 can be formed with a lower stretching column 61, which can be used to connect with the stretching testing machine, and the stretching testing machine can pull the lower stretching disc 60 through the lower stretching column 61.

[0067] In some embodiments, such as Figure 1 As shown, the first fixing member 10 has multiple legs 12 formed on the side near the lower stretching plate 60. These legs 12 are arranged around the perimeter of the lower stretching plate 60. By providing the legs 12, the first fixing member 10 can be placed more effectively, improving its stability. It is understood that, to ensure the legs 12 provide better support, their height can be greater than the overall dimension of the lower support plate along the height of the legs 12.

[0068] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A test tool for testing a stretch seal performance of a sealant, characterized by, The test tool comprises: a first fixing member having a first bonding surface; a second fixing member having a hollow structure and forming an accommodating cavity inside; one end of the second fixing member is a second bonding surface; the second bonding surface is arranged opposite to the first bonding surface and is bonded to each other by sealing glue, so that the first fixing member seals an opening at one end of the accommodating cavity; and a cover plate covering an opening at the other end of the accommodating cavity and arranged on the side of the second fixing member away from the first fixing member; the cover plate is connected with the second fixing member.

2. The test fixture of claim 1, wherein, The surface of the first fixing member near the side of the second fixing member has a protruding part; the protruding part is annular; the surface of the protruding part near the side of the second fixing member is the first bonding surface; and / or the second fixing member is further provided with a ventilation opening communicated with the accommodating cavity, and the ventilation opening is used for ventilating towards the accommodating cavity.

3. The test fixture of claim 2, wherein, The second fixing member comprises: a mounting part in the shape of a ring, connected with the cover plate, and the cover plate covers the inner ring of the mounting part; and a main body part arranged around the periphery of the inner ring of the mounting part on the side of the mounting part away from the cover plate; the main body part surrounds the accommodating cavity; and the end surface of the main body part away from the mounting part is the second bonding surface. The test tool further comprises: a plurality of limiting members arranged on the periphery of the protruding part; the plurality of limiting members are arranged at intervals along the circumference of the protruding part; wherein one end of the limiting member is connected with the first fixing member, and the other end is overlapped with the mounting part; when the mounting part is overlapped with the limiting member, the second bonding surface is arranged opposite to the first bonding surface at intervals.

4. The test fixture of claim 3, wherein, The mounting part is provided with a avoiding hole; the limiting member is provided with a limiting part on the peripheral wall; one end of the limiting member is arranged in the avoiding hole, and the limiting part is arranged on the side of the mounting part close to the main body part and abuts against the mounting part.

5. The test fixture of claim 1, wherein, The test tool further comprises: a sealing assembly arranged between the cover plate and the second fixing member and covering the opening at the other end of the accommodating cavity.

6. The test fixture of claim 5, wherein, The sealing assembly comprises: a sealing cover arranged on the side of the cover plate close to the second fixing member and connected with the cover plate; the sealing cover is used for covering the opening at the other end of the accommodating cavity.

7. The test fixture of claim 6, wherein, One end of the second fixing member away from the first fixing member is formed with a clamping part; the clamping part is arranged around the periphery of the opening at the other end of the accommodating cavity and has a spacing with the opening at the other end of the accommodating cavity; the sealing assembly further comprises: a sealing ring arranged on the inner side of the clamping part.

8. The test fixture of claim 7, wherein, Along the radial direction of the opening at the other end of the accommodating cavity, the width of the sealing ring is smaller than the spacing between the clamping part and the opening at the other end of the accommodating cavity; along the direction perpendicular to the plane where the opening is located, the thickness of the sealing ring is greater than the height of the clamping part; wherein the sealing ring is made of flexible material.

9. The test fixture of claim 7, wherein, The sealing assembly further comprises: A fastener is sequentially threaded through the cover plate and the sealing cover and extends into the clamping portion and is screwed with the clamping portion.

10. The test fixture of claim 1, wherein, The cover plate is an upper stretching disc; And / or, the test tool further comprises: A lower stretching disc is connected with the first fixing member on the side of the first fixing member away from the second fixing member.

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