Vibration tool and test equipment

Abstract

The embodiment of the utility model provides a vibration tool and test equipment, and the vibration tool comprises a supporting assembly which is provided with a supporting surface; the fixing assembly comprises a fixing structure and an adjusting structure, the fixing structure is connected with the supporting surface so as to form a gap with the supporting assembly, the adjusting structure is connected with the fixing structure so as to define a testing cavity, and at least part of the structure of the adjusting structure is configured to move relative to the fixing structure so as to adjust the area of the testing cavity, wherein the test cavity is configured to be used for accommodating a to-be-tested piece, and the fixing structure and / or the adjusting structure are / is configured to be used for supporting the to-be-tested piece. The actual situation can be simulated, the effectiveness of the vibration test result is improved, and the safety and reliability of the to-be-tested piece are ensured.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a vibration fixture and testing equipment. Background Technology

[0002] During the development of battery cells, to ensure their safety and reliability, mechanical shock tests and random vibration tests are typically conducted. Mechanical shock tests evaluate the mechanical structural strength of the cell under conditions such as acceleration, deceleration, and wheels skimming over potholes or rocky surfaces. Random vibration tests simulate the fatigue life under load conditions caused by random vibrations from uneven road surfaces during vehicle operation. Therefore, the closer the vibration and shock test conditions are to the actual usage conditions of the battery cell, the better the test results match real-world usage.

[0003] In related technologies, there is currently no dedicated device for vibration and shock testing of prismatic battery cells, and the vibration and shock testing process cannot simulate the actual use of battery cells, which greatly reduces the practical applicability of the battery cell vibration and shock test data and makes the test data unconvincing. Therefore, it is necessary to design a vibration fixture. Utility Model Content

[0004] The purpose of this application is to provide a vibration fixture and testing equipment that can simulate actual conditions, improve the effectiveness of vibration test results, and thus ensure the safety and reliability of the test piece.

[0005] In a first aspect, embodiments of this application provide a vibration fixture, comprising: a support assembly having a support surface; and a fixing assembly including a fixing structure and an adjusting structure, wherein the fixing structure is connected to the support surface to form a gap with the support assembly, and the adjusting structure is connected to the fixing structure to enclose and form a test cavity, wherein at least a portion of the adjusting structure is configured to move relative to the fixing structure to adjust the area of ​​the test cavity, wherein the test cavity is configured to accommodate a test piece, and the fixing structure and / or the adjusting structure is configured to support the test piece.

[0006] In the above implementation process, the fixing component is connected to the support surface of the support component, and the fixing structure is connected to the adjustment structure. When the test piece is placed in the test cavity formed by the fixing structure and the adjustment structure, the adjustment structure can adjust the area of ​​the test cavity according to the size of the test piece. At the same time, the fixing structure and / or the adjustment structure can support the test piece, thereby simulating the test piece in actual application, improving the effectiveness of the vibration test results, and ensuring the safety and reliability of the test piece.

[0007] In some embodiments, the adjustment structure includes a first adjustment beam and a second adjustment beam, the first adjustment beam and the second adjustment beam being disposed on opposite sides of the fixed structure, and the first adjustment beam and / or the second adjustment beam being movable relative to the fixed structure.

[0008] In the above implementation process, after the first adjustment beam and the second adjustment beam are connected and fixed respectively, the first adjustment beam and / or the second adjustment beam can move according to the area of ​​the test piece, so as to adapt to the test piece and more closely resemble the actual assembly state of the test piece. This allows for a quick exploration of the safety boundary state of the test piece, shortens the development and verification cycle of the test piece, and truly improves the reliability of the product.

[0009] In some embodiments, the bottom of the first adjusting beam is provided with a first adapter portion, which is configured to contact the fixed structure.

[0010] In the above process, the first adapter comes into contact with the fixed structure, making the first adjusting beam fit the fixed structure more closely. This helps to approach the actual assembly state of the test piece, allowing for a quick exploration of the safety boundary state of the test piece, shortening the development and verification cycle of the test piece, and truly improving the reliability of the product.

[0011] In some embodiments, the bottom of the second adjusting beam is provided with a second adapter portion, which is configured to contact the fixed structure.

[0012] In the above implementation process, the second adapter comes into contact with the fixed structure, making the second adjusting beam fit the fixed structure more closely. This helps to approach the actual assembly state of the test piece, allowing for a quick exploration of the safety boundary state of the test piece, shortening the development and verification cycle of the test piece, and truly improving the reliability of the product.

[0013] In some embodiments, the fixing structure includes a first fixing beam, a second fixing beam, and a base plate. The first fixing beam and the second fixing beam are spaced apart, and the first fixing beam and the second fixing beam are respectively connected to the base plate. The base plate is disposed at the bottom of the test piece.

[0014] In the above process, after the first fixed beam and the second fixed beam are connected to the base plate, they can form a test cavity with the adjustment structure. At the same time, the base plate can provide support for the test piece, which is closer to the actual assembly state of the test piece and meets the ground clearance requirements. It can simulate vibration tests under various working conditions and quickly explore the safety boundary state of the test piece, shortening the development and verification cycle of the test piece and truly improving the reliability of the product.

[0015] In some embodiments, a first extension is provided on the side of the first fixed beam opposite to the second fixed beam, and the first extension is connected to the support assembly. The first extension enables the first fixed beam to be fixed to the support assembly, ensuring the stability of the test piece during vibration testing, improving the accuracy of test results, quickly determining the safety boundary state of the test piece, and shortening the product development and verification cycle.

[0016] In some embodiments, the second fixed beam has a second extension on the side opposite to the first fixed beam, and the second extension is connected to the support assembly. The second extension enables the second fixed beam to be fixed to the support assembly, ensuring the stability of the test piece during vibration testing, improving the accuracy of test results, quickly determining the safety boundary state of the test piece, and shortening the product development and verification cycle.

[0017] In some embodiments, the adjustment structure connects the first fixed beam and the second fixed beam. With the cooperation of the first fixed beam, the second fixed beam, the base plate, and the adjustment structure, the environment in which the test piece is actually assembled in the housing can be simulated, which helps improve the accuracy of the test results, allows for rapid exploration of the safety boundary state of the test piece, and shortens the product development and verification cycle.

[0018] In some embodiments, the support assembly includes a support plate and a support block, the support block being connected to the support plate, and the side of the support block facing away from the support plate being connected to the fixing assembly. This not only provides support for the test piece but also meets the ground clearance requirements of the vehicle, thereby simulating vibration tests under various tooling conditions.

[0019] Secondly, this application also provides a testing device, including the vibration fixture as described in any of the above claims.

[0020] Since the testing equipment provided in the second aspect includes vibration fixtures, the testing equipment has all the technical effects of vibration fixtures, which will not be elaborated here.

[0021] Other features and advantages of this disclosure will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.

[0022] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the vibration fixture provided in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the vibration fixture that accommodates the test piece provided in the embodiments of this application;

[0026] Figure Labels

[0027] 100, Support assembly; 101, Support plate; 102, Support block; 200, Fixing assembly; 201, First adjusting beam; 2011, First adapter; 202, Second adjusting beam; 2021, Second adapter; 203, First fixing beam; 2031, First extension; 204, Second fixing beam; 2041, Second extension; 205, Base plate; 300, Test piece. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0033] Example

[0034] To adapt to the continuous improvement of battery cell energy density, the thickness of the mainstream battery cell casing has been reduced from 1.0mm to 0.5mm, and is still developing towards thinner thicknesses (0.35mm, 0.3mm), collectively referred to as thin-walled cells. Besides increasing cell energy density, thin-walled cells also offer a simpler layout and better thermal management. This is because the tabs of thin-walled cells are located on the side, allowing for compatibility with two-layer water-cooling systems. Based on these three factors, the thin-walled cell + CTP (Cell to Pack) structure is the future industry trend and is gradually being adopted by mainstream new energy vehicles both domestically and internationally.

[0035] Thin-walled, long aluminum-cased battery cells have three advantages, specifically:

[0036] ① High platform integration and high space utilization: The cell height is between 80mm and 110mm, which can effectively accommodate the space height requirements of different platforms (A / B / C) of vehicles. It is easy to adapt to different requirements of battery pack layout and vehicle ground clearance indicators. The space volume utilization rate is as high as 80%, making it easier to achieve a higher energy-to-weight ratio.

[0037] ② High production efficiency and low cost: The traditional tab connection method involves pre-welding the cell tabs together ultrasonically, then ultrasonically welding the tabs to a connecting piece, and finally laser welding the connecting piece to the terminal post on the top cover of the cell. This connection method requires two ultrasonic welding processes and one laser welding process. The second ultrasonic welding process has high power and high cost, and it also requires an additional connecting piece. This not only complicates the process but also increases production costs. The thin-walled long aluminum shell cell adopts a tab-less connection technology, which improves production efficiency and reduces production costs.

[0038] ③ Vertical cell layout with high efficiency of double-sided thermal management: The harmonica tube liquid cooling plate can be arranged on both sides of the large surface of the cell, or on the top and bottom of the cell, which can realize double-sided cooling of the cell, increase the contact area of ​​the liquid cooling plate, and improve the heat exchange capacity of the cell. When encountering superimposed conditions such as high-speed climbing and high-power fast charging, the temperature difference is 3-5℃, which greatly improves the competitiveness of the product.

[0039] During the design process, the inventors discovered that to ensure the safety and reliability of battery cells, mechanical shock tests and random vibration tests are typically conducted. Mechanical shock tests evaluate the mechanical structural strength of the battery cell under conditions such as acceleration, deceleration, and wheels skimming over potholes or rocky surfaces. Random vibration tests primarily simulate the fatigue life under the load conditions caused by random vibrations from uneven road surfaces during vehicle operation. Therefore, the closer the vibration and shock test conditions are to the actual usage conditions of the battery cell, the better the test results match real-world usage.

[0040] Random vibration and mechanical shock tests are used to test the reliability and durability of batteries. If the battery does not leak or fail after being vibrated for a period of time according to certain standards, it can be determined that the battery's fatigue strength meets the requirements.

[0041] Vibration fixtures for battery cells play an indispensable role in cell vibration testing. The main approaches are as follows: 1. Vertical cell placement with large-area clamping: The vibration impact fixture uses a cell fixing device to vertically compress the cell, resulting in more accurate test data and better performance during vibration impact testing. 2. Horizontal cell placement with large-area clamping: The clamping fixture more closely approximates the actual installation state of the cell within the battery, thus improving the accuracy of test results. 3. Vertical cell placement with large-area clamping: The fixture has a hollowed-out center, connected to both sides of the cell's width by two support plates. Two connecting plates on both sides of the cell's thickness connect between the two support plates, creating a gap between the plate and the cell. This ensures the cell's state within the fixture matches its state within the battery pack, improving testing accuracy. Furthermore, this simple fixture structure reduces production costs.

[0042] The technical disadvantages of the above solution are:

[0043] (1) The designed cell vibration test fixture has certain limitations and fails to simulate the stress and vibration characteristics of the cells under the actual assembly state of the battery pack, resulting in distorted test results:

[0044] The above solutions simply clamp the battery cell with two steel plates and then fix the entire assembly on a vibration table. They completely fail to consider the multi-dimensional stress differences experienced by the battery cell in its assembled state, such as the relatively low frictional force due to compression under the cushioning of fireproof and heat-insulating cotton. Furthermore, they do not account for the influence of the structural thermally conductive adhesive applied to the bottom of the cell in a CTP (Cell-to-Pack) structure, and the varying amounts of this adhesive. This leads to distorted test results. It is common to encounter situations where the battery cell passes the vibration fatigue test, but the module or battery pack fails.

[0045] (2) The cell test conditions are only one of many states and cannot simulate or cover the extreme conditions of the cells under the battery pack conditions, resulting in distorted test results:

[0046] In the initial development stage, vibration fatigue tests are conducted on battery cells according to certain standards (such as national standards) to verify whether the design structure of the battery cells is reasonable. However, the vibration spectrum of the battery cell test is only one of many states and cannot simulate or cover the extreme working conditions of the battery cell under the battery pack state, which leads to the distortion of the test results. That is, the vibration fatigue test results of a single battery cell cannot be equivalent to the test results of the battery. It is impossible to judge in advance whether the designed battery pack has sufficient fatigue strength by the vibration results of the battery cell. Therefore, it is impossible to realize risk prevention and is not conducive to the design and development of batteries.

[0047] In view of this, such as Figures 1-2 As shown, in a first aspect, embodiments of this application provide a vibration fixture, including: a support assembly 100 having a support surface; and a fixing assembly 200 including a fixing structure and an adjusting structure. The fixing structure is connected to the support surface to form a gap with the support assembly 100 (i.e., similar to the ground clearance of the test piece after actual assembly). The adjusting structure is connected to the fixing structure to enclose and form a test cavity. At least a portion of the adjusting structure is configured to move relative to the fixing structure to adjust the area of ​​the test cavity. The test cavity is configured to accommodate the test piece 300, and the fixing structure and / or the adjusting structure is configured to support the test piece 300.

[0048] For example, the support component 100 and the fixing component 200 can be fixed by riveting or FSW welding, and the fixing structure and the adjusting structure can be fixed by riveting or FSW welding to form a box structure for accommodating the test piece 300, wherein the test piece 300 can be a number of battery cells or a battery module.

[0049] In the above implementation process, the fixing component 200 is connected to the support surface of the support component 100, and the fixing structure is connected to the adjustment structure. When the test piece is placed in the test cavity formed by the fixing structure and the adjustment structure, the adjustment structure can adjust the area of ​​the test cavity according to the size of the test piece. At the same time, the fixing structure and / or the adjustment structure can support the test piece, thereby simulating the situation of the test piece in actual application, improving the effectiveness of the vibration test results, and ensuring the safety and reliability of the test piece.

[0050] like Figures 1-2 As shown, the adjustment structure includes a first adjustment beam 201 and a second adjustment beam 202, which are disposed on opposite sides of the fixed structure, and the first adjustment beam 201 and / or the second adjustment beam 202 are movable relative to the fixed structure.

[0051] For example, the structures of the first adjusting beam 201 and the second adjusting beam 202 can be configured to be identical, with the first adjusting beam 201 and the second adjusting beam 202 distributed in parallel, and the distribution directions of the first adjusting beam 201 and the second adjusting beam 202 being consistent with the distribution direction of the test piece. In one embodiment, the first adjusting beam 201 is fixedly connected to the fixed structure, and the second adjusting beam 202 can move along a direction close to or away from the first adjusting beam 201.

[0052] In the above implementation process, after the first adjusting beam 201 and the second adjusting beam 202 are respectively connected and fixed, the first adjusting beam 201 and / or the second adjusting beam 202 can move according to the area of ​​the test piece, so as to adapt to the test piece and get closer to the actual assembly state of the test piece. This allows for a quick exploration of the safety boundary state of the test piece, shortens the development and verification cycle of the test piece, and truly improves the reliability of the product.

[0053] like Figure 1 As shown, the bottom of the first adjusting beam 201 is provided with a first adapter 2011. The first adapter 2011 includes, but is not limited to, an inclined shape. Correspondingly, the first fixing beam 203 and the second fixing beam 204 of the fixing structure are respectively set to be inclined for fitting with the first adapter 2011. The first adapter 2011 is configured to contact the fixing structure.

[0054] In the above implementation process, the first adapter 2011 contacts the fixed structure, making the first adjusting beam 201 fit the fixed structure more closely. This is beneficial to approach the actual assembly state of the test piece, allowing for a quick exploration of the safety boundary state of the test piece, shortening the development and verification cycle of the test piece, and truly improving the reliability of the product.

[0055] Please refer to again Figure 1 The bottom of the second adjusting beam 202 is provided with a second adapter 2021. The first adapter 2011 includes, but is not limited to, an inclined shape. Correspondingly, the first fixing beam 203 and the second fixing beam 204 of the fixing structure are respectively set to be inclined for fitting with the first adapter 2011. The second adapter 2021 is configured to contact the fixing structure.

[0056] In the above implementation process, the second adapter 2021 contacts the fixed structure, making the second adjusting beam 202 fit the fixed structure more closely. This is beneficial to approach the actual assembly state of the test piece, allowing for a quick exploration of the safety boundary state of the test piece, shortening the development and verification cycle of the test piece, and truly improving the reliability of the product.

[0057] In some embodiments, the fixing structure includes a first fixing beam 203, a second fixing beam 204, and a base plate 205. The first fixing beam 203 and the second fixing beam 204 are spaced apart, and the first fixing beam 203 and the second fixing beam 204 are respectively connected to the base plate 205. The base plate 205 is disposed at the bottom of the test piece.

[0058] For example, the first fixed beam 203, the second fixed beam 204 and the base plate 205 can be fixed together by FSW welding or riveting. After the base plate 205 is connected to the support block 102 of the support structure, the base plate 205 and the support plate 101 of the support structure form a ground clearance, which meets the clearance requirement (≥150mm).

[0059] Taking the test piece as a battery cell as an example, the first fixing beam 203, the second fixing beam 204, the base plate 205, the first adjusting beam 201, and the second adjusting beam 202 are firmly connected to the support assembly 100 by bolt tightening. After the fixing structure and the adjusting structure are combined, the result more closely resembles the actual state of the battery pack. Both the fixing structure and the adjusting structure utilize components from the battery pack itself, fulfilling the actual assembly characteristics of the battery pack, such as the contact area between the battery cell and the base plate 205, the arrangement of the battery cells, and the battery... The distance between the individual cells and various peripheral components such as the first fixed beam 203 and the second fixed beam 204, as well as the control of the amount of adhesive applied between the individual cells and the base plate 205, can simulate the vibration of each individual cell in an actual battery pack of approximately 150 individual cells. This allows for the identification of the cell most prone to failure under the overall battery pack structure. It can also simulate the failure state of individual cells under extreme operating conditions. The modal deviation between the tooling structure and the actual battery pack does not exceed 3Hz. The structure is simple and easy to disassemble and assemble. The second adjusting beam 202 can be fixed with bolts, enabling vibration and shock tests at the cell and module levels.

[0060] In the above process, after the first fixed beam 203 and the second fixed beam 204 are connected to the base plate 205, they can form a test cavity with the adjustment structure. At the same time, the base plate 205 can provide support for the test piece, which is closer to the actual assembly state of the test piece and meets the ground clearance requirements. It can simulate vibration tests under various working conditions and quickly explore the safety boundary state of the test piece, shortening the development and verification cycle of the test piece and truly improving the reliability of the product.

[0061] In some embodiments, the first fixed beam 203 has a first extension 2031 on the side opposite to the second fixed beam 204, and the first extension 2031 is connected to the support assembly 100. The first extension 2031 enables the first fixed beam 203 to be fixed to the support assembly 100, ensuring the stability of the test piece during vibration testing, improving the accuracy of test results, quickly determining the safety boundary state of the test piece, and shortening the product development and verification cycle.

[0062] like Figures 1-2As shown, the second fixed beam 204 has a second extension 2041 on the side opposite to the first fixed beam 203, and the second extension 2041 is connected to the support assembly 100. The second extension 2041 enables the second fixed beam 204 to be fixed to the support assembly 100, ensuring the stability of the test piece during vibration testing, improving the accuracy of test results, quickly determining the safety boundary state of the test piece, and shortening the product development and verification cycle.

[0063] In some embodiments, the adjustment structure connects the first fixed beam 203 and the second fixed beam 204. With the cooperation of the first fixed beam 203, the second fixed beam 204, the base plate 205, and the adjustment structure, the environment in which the test piece is actually assembled in the housing can be simulated, which helps improve the accuracy of the test results, allows for rapid exploration of the safety boundary state of the test piece 300, and shortens the product development and verification cycle.

[0064] In some embodiments, the support assembly 100 includes a support plate 101 and a support block 102. The support block 102 is connected to the support plate 101. Two support blocks 102 may be provided, and the side of the support block 102 facing away from the support plate 101 is connected to the fixing assembly 200. This not only provides support for the test piece but also meets the ground clearance requirements of the vehicle, thereby simulating vibration tests under various tooling conditions.

[0065] Secondly, this application also provides a testing device, including the vibration fixture described above.

[0066] Since the testing equipment provided in the second aspect includes vibration fixtures, the testing equipment has all the technical effects of vibration fixtures, which will not be elaborated here.

[0067] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0068] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0069] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0070] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology 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 protection of the claims.

Claims

1. A vibration fixture, characterized in that, include: Support components, which are equipped with support surfaces; A fixing component includes a fixing structure and an adjusting structure. The fixing structure is connected to the support surface to form a gap with the support component. The adjusting structure is connected to the fixing structure to enclose and form a test cavity. At least a portion of the adjusting structure is configured to move relative to the fixing structure to adjust the area of ​​the test cavity. The test cavity is configured to accommodate a test piece, and the fixing structure and / or the adjusting structure is configured to support the test piece.

2. The vibration fixture according to claim 1, characterized in that, The adjustment structure includes a first adjustment beam and a second adjustment beam, which are disposed on opposite sides of the fixed structure, and the first adjustment beam and / or the second adjustment beam are movable relative to the fixed structure.

3. The vibration fixture according to claim 2, characterized in that, The bottom of the first adjusting beam is provided with a first adapter, which is configured to contact the fixed structure.

4. The vibration fixture according to claim 2 or 3, characterized in that, The bottom of the second adjusting beam is provided with a second adapter, which is configured to contact the fixed structure.

5. The vibration fixture according to claim 1, characterized in that, The fixing structure includes a first fixing beam, a second fixing beam, and a base plate. The first fixing beam and the second fixing beam are spaced apart, and the first fixing beam and the second fixing beam are respectively connected to the base plate. The base plate is disposed at the bottom of the test piece.

6. The vibration fixture according to claim 5, characterized in that, The first fixed beam has a first extension on the side opposite to the second fixed beam, and the first extension is connected to the support assembly.

7. The vibration fixture according to claim 5 or 6, characterized in that, The second fixed beam has a second extension on the side opposite to the first fixed beam, and the second extension is connected to the support assembly.

8. The vibration fixture according to claim 5, characterized in that, The adjustment structure connects the first fixed beam and the second fixed beam.

9. The vibration fixture according to claim 1, characterized in that, The support assembly includes a support plate and a support block. The support block is connected to the support plate, and the side of the support block facing away from the support plate is connected to the fixing assembly.

10. A testing device, characterized in that, Including the vibration fixture as described in any one of claims 1-9.

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