Tension test fixture

Abstract

The utility model belongs to battery technical field discloses a kind of tension test tool, for being installed on tension machine clamping piece to be tested, including first clamping pedestal and the second clamping pedestal corresponding arrangement with first clamping pedestal;First clamping pedestal includes first bearing fixed component and first clamping main body detachably connected on it, both corresponding arrangement forms the first clamping area for clamping the end of piece to be tested;Second clamping pedestal includes second bearing fixed component and second clamping main body detachably connected on it, both corresponding arrangement forms the second clamping area for clamping the other end of piece to be tested, and the clamping plane of first clamping area and second clamping area is perpendicular to each other, two perpendicular edges of L-shaped test piece can be accurately adapted to clamping, solve the problem that existing tension machine fixture cannot fix L-shaped test piece due to clamping plane parallel, ensure that tension direction accurately acts on lithium battery module shell welding position, improve test accuracy and strength verification demand.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a tensile testing fixture. Background Technology

[0002] In the field of new energy lithium battery manufacturing, the structural strength of the module shell is crucial to battery safety. The welding point between the side plate and the end plate is a key stress point, and its mechanical strength needs to be verified through tensile testing. Currently, the tensile testing equipment commonly used in the industry generally has a clamping structure designed to be adapted to straight materials. The two clamping planes formed by the two clamps at both ends are parallel to each other and located on the same plane, which means that only flat or straight test pieces can be effectively fixed.

[0003] However, the welding area between the side plate and the end plate of the lithium battery module shell needs to be cut into L-shaped test pieces for targeted testing. Since the existing fixtures lack a clamping structure that is compatible with the two vertical sides of the L-shaped test piece, the test piece cannot be stably fixed, which makes it difficult for the tensile testing machine to accurately perform strength testing on the L-shaped welded parts, making it difficult to meet the production quality verification requirements. Utility Model Content

[0004] The main purpose of this utility model is to provide a tensile testing fixture, which aims to solve the technical problem that the existing tensile testing machine's built-in clamps are only suitable for straight materials, and the clamping planes at both ends are parallel and located on the same plane, which cannot stably fix the L-shaped test piece, resulting in the inability to accurately test the strength of the welded parts of the lithium battery module shell.

[0005] In order to achieve the above-mentioned utility model objectives, this utility model proposes a tensile testing fixture for clamping the test piece on a tensile testing machine, including a first clamping base and a second clamping base arranged corresponding to the first clamping base; The first clamping base includes a first bearing fixing component and a first clamping body detachably connected to the first bearing fixing component. The first clamping body is arranged correspondingly to the first bearing fixing component to form a first clamping area for clamping one end of the test piece. The second clamping base includes a second bearing fixing component and a second clamping body detachably connected to the second bearing fixing component. The second clamping body is arranged correspondingly to the second bearing fixing component to form a second clamping area for clamping the other end of the test piece. The clamping plane of the first clamping area is perpendicular to the clamping plane of the second clamping area.

[0006] Furthermore, the first load-bearing fixing component includes a first support and a first fixing component. The first support has a first receiving chamber, the first clamping body is located in the first receiving chamber, and the first fixing component is movably connected to the first support and detachably connected to the first clamping body.

[0007] Furthermore, a first clamping surface is provided on the side of the first clamping body away from the first fixing component, and a second clamping surface is provided on the inner wall of the first accommodating cavity. The first clamping area is formed by the first clamping surface and the second clamping surface being arranged opposite to each other.

[0008] Furthermore, the first fixing component includes a first limiting pull member and a plurality of first tightening members arranged at intervals from the first limiting pull member. The first tightening members pass through the first support and abut against the first clamping body, and the first limiting pull member passes through the first support and is movably connected within the first clamping body.

[0009] Furthermore, the second load-bearing fixing component includes a second support and a second fixing component. The second support has a second receiving chamber, the second clamping body is located in the second receiving chamber, and the second fixing component is movably connected to the second support and detachably connected to the second clamping body.

[0010] Furthermore, a third clamping surface is provided on the side of the second clamping body away from the second fixing component, a support portion is provided on the inner wall of the second accommodating chamber near the third clamping surface, and a fourth clamping surface is provided on the side of the support portion near the third clamping surface. The second clamping area is formed by the relative arrangement of the third clamping surface and the fourth clamping surface.

[0011] Furthermore, the second fixing component includes a second limiting pull member and a plurality of second tightening members arranged at intervals from the second limiting pull member. The second tightening members pass through the second support and abut against the second clamping body, and the second limiting pull member passes through the second support and is movably connected within the second clamping body.

[0012] Furthermore, the first support is provided with a first clearance groove, which is located on the side of the first support away from the second clamping surface.

[0013] Furthermore, the second clamping body is provided with a second clearance groove, which is located on the side of the second clamping body away from the third clamping surface.

[0014] Furthermore, the first clamping base also includes a first connecting shaft, and the second clamping base also includes a second connecting shaft. The first connecting shaft is disposed at the end of the first bearing fixing component away from the first clamping body, and the second connecting shaft is disposed at the end of the second bearing fixing component away from the second clamping body. The first connecting shaft and the second connecting shaft are located on the same straight line.

[0015] Beneficial effects: This utility model discloses a tensile testing fixture for clamping a test piece on a tensile testing machine. It includes a first clamping base and a second clamping base corresponding to the first clamping base. The first clamping base includes a first load-bearing fixing component and a first clamping body detachably connected to the first load-bearing fixing component. The first clamping body and the first load-bearing fixing component are arranged correspondingly to form a first clamping area for clamping one end of the test piece. The second clamping base includes a second load-bearing fixing component and a second clamping body detachably connected to the second load-bearing fixing component. The second clamping body and the second load-bearing fixing component are arranged correspondingly to form a second clamping area for clamping the other end of the test piece. The clamping plane of the first clamping area and the clamping plane of the second clamping area are perpendicular to each other, allowing for precise adaptation to the two vertical sides of an L-shaped test piece, achieving stable clamping. This solves the problem of existing tensile testing machine fixtures being unable to fix L-shaped test pieces due to parallel clamping planes, ensuring that the direction of force during tensile testing is accurately applied to the welding part of the lithium battery module casing, improving testing accuracy and meeting its strength verification requirements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a tensile testing fixture according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a tensile testing fixture according to an embodiment of the present invention; Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged view of point A.

[0017] in: 1. First clamping base; 2. Second clamping base; 3. Test piece; 10. First load-bearing fixing component; 11. First clamping body; 12. First clamping area; 13. First connecting shaft; 14. First locking nut; 20. Second load-bearing fixing component; 21. Second clamping body; 22. Second clamping area; 23. Second connecting shaft; 24. Second locking nut; 100. First support; 101. First fixing component; 102. First accommodating chamber; 103. First clamping surface; 104. Second clamping surface; 105. First clearance groove; 1010, First limiting pull member; 1011, First clamping member; 201. Second support; 202. Second fixing component; 203. Second accommodating chamber; 204. Third clamping surface; 205. Support part; 206. Fourth clamping surface; 207. Second clearance groove; 2020, Second limit pull component; 2021, Second tightening component.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Reference Figures 1-3 This embodiment provides a tensile testing fixture for clamping the test piece 3 on a tensile testing machine, including a first clamping base 1 and a second clamping base 2 arranged corresponding to the first clamping base 1; The first clamping base 1 includes a first bearing fixing component 10 and a first clamping body 11 detachably connected to the first bearing fixing component 10. The first clamping body 11 is arranged correspondingly to the first bearing fixing component 10 to form a first clamping area 12 for clamping one end of the test piece 3. The second clamping base 2 includes a second bearing fixing component 20 and a second clamping body 21 detachably connected to the second bearing fixing component 20. The second clamping body 21 is arranged correspondingly to the second bearing fixing component 20 to form a second clamping area 22 for clamping the other end of the test piece 3. The clamping plane of the first clamping area 12 is perpendicular to the clamping plane of the second clamping area 22.

[0024] In the above embodiment, the tensile testing fixture is used to clamp the test piece 3 on the tensile testing machine. The test piece 3 is an L-shaped specimen. Its core structure includes a first clamping base 1 and a second clamping base 2, which are used to clamp the two vertical arms of the L-shaped test piece 3, respectively. The first clamping base 1 is a clamping unit installed on the upper part of the tensile testing machine and is used to fix one end of the L-shaped specimen. The second clamping base 2 is a clamping unit installed on the lower part of the tensile testing machine and is used to fix the other end of the L-shaped specimen. The two clamping bases are arranged vertically in the space along the tensile direction of the tensile testing machine. Each clamping base consists of a load-bearing fixing component and a detachably connected clamping body: the first clamping base 1 includes a first load-bearing fixing component 10 and a first clamping body 11, which together form a first clamping area 12; the second clamping base 2 includes a second load-bearing fixing component 20 and a second clamping body 21, which together form a second clamping area 22; the first clamping area 12 is used to clamp one vertical arm of the L-shaped specimen, and the second clamping area 22 is used to clamp the other vertical arm orthogonal to it; the clamping plane of the first clamping area 12 and the clamping plane of the second clamping area 22 are perpendicular to each other in space, and this perpendicular spatial relationship perfectly matches the geometric features of the L-shaped specimen, so that the two clamping areas can stably clamp the two vertical sides of the specimen respectively; After the L-shaped test piece is inserted into the two clamping areas, the two ends of the test piece can be firmly clamped by adjusting and locking the relative position between the clamping body and the supporting fixing component. Therefore, this fixture, by making the clamping planes of the first and second clamping areas 22 perpendicular to each other, can precisely fit the two vertical sides of the L-shaped test piece, achieving stable clamping. This solves the problem of existing tensile testing machine fixtures being unable to fix L-shaped test pieces due to parallel clamping planes, ensuring that the force direction is accurately applied to the welded parts of the lithium battery module casing during tensile testing, improving testing accuracy, and meeting its strength verification requirements.

[0025] Reference Figures 1-3 In one embodiment, the first bearing fixing component 10 includes a first support 100 and a first fixing component 101. The first support 100 has a first receiving chamber 102. The first clamping body 11 is located in the first receiving chamber 102. The first fixing component 101 is movably connected to the first support 100 and is detachably connected to the first clamping body 11.

[0026] In the above embodiment, the first bearing fixing component 10 includes a first support 100 and a first fixing component 101. The first support 100 has a first receiving chamber 102 inside, which is a recessed space for accommodating and positioning the first clamping body 11. The first clamping body 11 is a detachable metal component placed in the first receiving chamber 102, forming a clamping surface together with the inner wall of the chamber, for clamping one end of the L-shaped test piece 3. The first fixing component 101 is movably connected to the first support 100, usually by a threaded connection (such as a bolt or screw), and is further detachably connected to the first clamping body 11. The first fixing component 101 penetrates the side wall of the first support 100 and extends into the receiving chamber. Its end is connected to or abuts against the first clamping body 11. By rotating the first fixing component 101, its rotation in or out movement on the first support 100 can be realized, thereby adjusting the force on the first clamping body 11. When the first fixing component 101 is screwed in, it pushes the first clamping body 11 toward the inner wall of the accommodating chamber, and clamps the L-shaped test piece with the inner wall. When it is screwed out, the clamping force is released, which facilitates the insertion or removal of the test piece. This structure realizes the detachable installation of the first clamping body 11 in the first support 100, which makes it easy to replace the clamping body of different specifications to adapt to the test pieces of different thicknesses or materials. Furthermore, the thread adjustment of the first fixing component 101 enables precise control of the clamping force, ensuring that the test piece does not slip or loosen during the tensile test, thus ensuring the accuracy of the test results.

[0027] Reference Figures 1-3 In one embodiment, the first clamping body 11 has a first clamping surface 103 on the side away from the first fixing component 101, and a second clamping surface 104 is provided on the inner wall of the first accommodating chamber 102. The first clamping area 12 is formed by the first clamping surface 103 and the second clamping surface 104 being arranged opposite to each other.

[0028] In the above embodiment, the first clamping body 11 is a metal component that can be detachably installed in the first support 100. It has an overall L-shaped structure, including a short side and a long side. The first accommodating chamber 102 is located inside the first support 100 and is also designed as an L-shaped structure, including a horizontal accommodating groove and a vertical accommodating groove, which are used to accommodate the short side and the long side of the first clamping body 11, respectively. A first clamping surface 103 is provided on the side of the first clamping body 11 away from the first fixing component 101 (i.e., the outer side of its long side), and a second clamping surface 104 is provided on the inner wall of the vertical accommodating groove of the first accommodating chamber 102. The two clamping surfaces are arranged opposite to each other and together form a first clamping area 12, which is used to clamp one end of the vertical arm of the L-shaped test piece. Both the first clamping surface 103 and the second clamping surface 104 adopt a serrated structure, which can significantly increase the friction with the surface of the test piece and prevent slippage during the tensile test. When the first fixing component 101 pushes the first clamping body 11 inward, the distance between the first clamping surface 103 and the second clamping surface 104 decreases, thereby clamping the test piece placed therein. The clamping plane of the entire clamping area is located between the first clamping surface 103 and the second clamping surface 104, and this plane is parallel to the direction of the tensile force applied by the tensile testing machine, ensuring accurate force transmission direction, avoiding off-center loading, and improving the reliability of test data.

[0029] Reference Figures 1-3In one embodiment, the first fixing component 101 includes a first limiting pull member 1010 and a plurality of first tightening members 1011 arranged at intervals from the first limiting pull member 1010. The first tightening members 1011 pass through the first support 100 and abut against the first clamping body 11. The first limiting pull member 1010 passes through the first support 100 and is movably connected within the first clamping body 11.

[0030] In the above embodiment, the first fixing component 101 includes a first limiting pull member 1010 and a plurality of first tightening members 1011. A plurality of threaded holes are provided on one side of the first support 100 (i.e., the side without the second clamping surface 104), for respectively installing the first limiting pull member 1010 and the plurality of first tightening members 1011. The first limiting pull member 1010 is a pull ring bolt, penetrating one side of the first support 100 and extending into the first accommodating chamber 102. Its end is threadedly connected to the interior of the first clamping body 11. It provides positioning and pre-tightening functions, while the pull ring structure at its head facilitates manual operation and identification. The first tightening member 1011 consists of multiple tightening bolts, which are arranged at intervals on the same side wall of the first support 100 as the first limiting pull member 1010. They are also connected by threads through the side wall of the first support 100 and extend into the first accommodating chamber 102. Their ends abut against the surface of the first clamping body 11 on the side where the first clamping surface 103 is not provided. The clamping force is precisely controlled by adjusting the screw-in depth of the tightening bolts to avoid uneven loading or deformation caused by single-point force.

[0031] Reference Figures 1-3 In one embodiment, the second bearing fixing component 20 includes a second support 201 and a second fixing component 202. The second support 201 has a second accommodating chamber 203. The second clamping body 21 is located in the second accommodating chamber 203. The second fixing component 202 is movably connected to the second support 201 and is detachably connected to the second clamping body 21.

[0032] In the above embodiment, the second bearing fixing component 20 includes a second support 201 and a second fixing component 202. The second accommodating chamber 203 is disposed inside the second support 201. The second clamping body 21 is a detachable metal component placed inside the second accommodating chamber 203 and forms a clamping surface with the inner wall of the chamber for clamping the other vertical arm of the L-shaped test piece 3. The second fixing component 202 is movably connected to the second support 201, specifically through one side of the second support 201 by a threaded connection, and is detachably connected to the second clamping body 21. By rotating the second fixing component 202, it can be screwed in or out on the second support 201, thereby pushing or releasing the second clamping body 21 to clamp or release the test piece. The second support 201 is designed with a U-shaped structure, which is formed by two opposing bottom surfaces and sides. The side closer to the first support 100 (i.e., the upper clamping base) is shorter, while the opposite side is longer, providing installation clearance space for the upper first support 100 and avoiding interference between the upper and lower structures during installation. The entire structure achieves precise control of the second clamping body 21 through the threaded adjustment of the second fixing component 202, ensuring the reliability of clamping and the convenience of operation.

[0033] Reference Figures 1-3 In one embodiment, the second clamping body 21 has a third clamping surface 204 on the side away from the second fixing component 202, and a support portion 205 is provided on the inner wall of the second accommodating chamber 203 near the third clamping surface 204. The support portion 205 has a fourth clamping surface 206 on the side near the third clamping surface 204. The second clamping area 22 is formed by the relative arrangement of the third clamping surface 204 and the fourth clamping surface 206.

[0034] In the above embodiment, the second clamping body 21 is an L-shaped metal part that can be detachably installed in the second support 201, including a short arm and a long arm. A third clamping surface 204 is provided on the side away from the second fixing component 202. The second accommodating chamber 203 is located inside the second support 201 and is also designed as an L-shaped structure, including a vertical groove and a horizontal groove, which are used to accommodate the short arm and the long arm of the second clamping body 21, respectively. The support part 205 is an integral structure that protrudes inward from the inner wall of the second accommodating chamber 203 and is located on the inner side of the longer side of the bottom of the second support 201. A fourth clamping surface 206 is provided on its top. The third clamping surface 204 and the fourth clamping surface 206 are arranged opposite to each other, and a second clamping area 22 is formed between them for clamping one end of the vertical arm of the L-shaped test piece. Both clamping surfaces are designed with a serrated structure to enhance friction and prevent the specimen from slipping. The outer side of the support 205, the free end of the long side of the second clamping body 21, and the second clamping surface 104 are located on the same plane. The clamping plane of the second clamping area 22 is located between the third and fourth clamping surfaces 206, and this plane is perpendicular to the tensile force direction of the tensile testing machine, forming a spatial orthogonal layout with the upper clamping area. This adapts to the geometric characteristics of the L-shaped specimen, ensuring that the tensile force is accurately applied to the weld area and improving the accuracy of the test.

[0035] Reference Figures 1-3In one embodiment, the second fixing component 202 includes a second limiting pull member 2020 and a plurality of second tightening members 2021 arranged at intervals from the second limiting pull member 2020. The second tightening members 2021 pass through the second support 201 and abut against the second clamping body 21. The second limiting pull member 2020 passes through the second support 201 and is movably connected within the second clamping body 21.

[0036] In the above embodiment, the second fixing component 202 includes a second limiting pull member 2020 and a plurality of second tightening members 2021. The second limiting pull member 2020 is a pull ring bolt that penetrates one side of the second support 201 and extends into the second accommodating cavity 203. Its end is threadedly connected to the interior of the second clamping body 21, achieving detachable fixing. This pull ring bolt not only serves a connecting function but also axially limits and guides the second clamping body 21 during adjustment, preventing it from shifting or rotating within the cavity. The second tightening members 2021 are a plurality of tightening bolts, located on the same side wall of the second support 201 as the second limiting pull member 2020. Arranged at intervals, both are threaded through the side of the second support 201 (i.e., the side of the second accommodating chamber 203 without the fourth clamping surface 206) and extend into the chamber. The end of the second clamping member 2021 in the chamber abuts against the surface of the second clamping body 21 without the third clamping surface 204. By tightening, a top pressure can be applied, pushing the second clamping body 21 towards the support 205, thereby clamping the L-shaped test piece placed between the third clamping surface 204 and the fourth clamping surface 206. The arrangement of multiple clamping members achieves uniform force application at multiple points, avoiding uneven clamping or deformation of the clamping body due to single-point force, and preventing slippage or loosening.

[0037] Reference Figures 1-3 In one embodiment, the first support 100 is provided with a first clearance groove 105, which is located on the side of the first support 100 away from the second clamping surface 104.

[0038] In the above embodiment, a first clearance groove 105 is provided on the first support 100. The first clearance groove 105 is a recessed structure provided on the first support 100, specifically located on the outer surface of the first support 100 away from the second clamping surface 104. The main function of the first clearance groove 105 is to provide assembly clearance space for the top of the second support 201. During the overall installation of the tooling, the first support 100 is usually fixed to the upper chuck of the tensile testing machine, and the second support 201 is fixed to the lower chuck. The two are arranged opposite each other in the vertical direction. Since the second support 201 is a U-shaped structure, its top edge may interfere with the bottom area of ​​the first support 100 in space. The setting of the first clearance groove 105 forms a recessed area at the corresponding position of the first support 100, so that the top of the second support 201 can avoid installation difficulties or equipment damage caused by structural conflict during installation, which significantly improves installation efficiency and ease of operation.

[0039] Reference Figures 1-3 In one embodiment, the second clamping body 21 is provided with a second clearance groove 207, which is located on the side of the second clamping body 21 away from the third clamping surface 204.

[0040] In the above embodiment, a second clearance groove 207 is provided on the second clamping body 21. The second clearance groove 207 is a partial recessed structure provided on the second clamping body 21, specifically located on the side surface of the clamping body away from the third clamping surface 204, that is, the back area that does not directly participate in the clamping action. That is, the clearance groove is opened at the end of the long side of the second clamping body 21 or near the free end. The main function of the second clearance groove 207 is to provide assembly clearance space for the bottom of the first support 100. During the overall assembly of the tooling, the first support 100, as the main body of the upper clamping base, may have spatial interference with the top area of ​​the second clamping body 21 in the vertical direction, especially when the upper and lower clamping areas are close. The provision of the second clearance groove 207 at the corresponding position of the second clamping body 21 forms a receiving space, so that the bottom edge of the first support 100 can avoid physical collision between the two during installation or testing, and prevent installation difficulties or component damage caused by collision.

[0041] Reference Figures 1-3 In one embodiment, the first clamping base 1 further includes a first connecting shaft 13, and the second clamping base 2 further includes a second connecting shaft 23. The first connecting shaft 13 is disposed at the end of the first bearing fixing component 10 away from the first clamping body 11, and the second connecting shaft 23 is disposed at the end of the second bearing fixing component 20 away from the second clamping body 21. The first connecting shaft 13 and the second connecting shaft 23 are located on the same straight line.

[0042] In the above embodiments, the first clamping base 1 further includes a first connecting shaft 13, and the second clamping base 2 further includes a second connecting shaft 23. The first connecting shaft 13 is disposed on the top of the first clamping base 1, specifically at the end of the first bearing fixing component 10 away from the first clamping body 11, i.e., the top region of the first support 100. The first support 100 is connected to the upper part of the tensile testing machine by a first locking nut 14 on the first connecting shaft 13. The connecting shaft is usually a cylindrical rod-shaped structure with its axis parallel to the tensile force direction, used to detachably connect the first support 100 to the upper chuck or mounting interface of the tensile testing machine. The second connecting shaft 23 is disposed at the bottom of the second clamping base 2. Located at the end of the second bearing fixing component 20 away from the second clamping body 21, i.e. the bottom area of ​​the second support 201, its structure is similar to that of the first connecting shaft 13. The second support 201 is connected to the lower part of the tensile testing machine by the first locking nut 24 on the second connecting shaft 23, which is used to connect the second support 201 to the lower clamp or fixed platform of the tensile testing machine. The central axes of the first connecting shaft 13 and the second connecting shaft 23 are on the same straight line, and this straight line is consistent with the direction of the tensile force applied by the tensile testing machine. This ensures that the tensile force can be uniformly transmitted along the predetermined axis during the test, avoiding uneven stress on the sample, bending moment, or test data distortion caused by eccentric loading.

[0043] In use, hold the first limiting pull member 1010 and the second limiting pull member 2020 to move the first clamping base 1 and the second clamping base 2. Install the first clamping base 1 on the upper part of the tensile testing machine through the first connecting shaft 13, and install the second clamping base 2 on the lower part of the tensile testing machine through the second connecting shaft 23. Rotate the locking nut to fix the first connecting shaft 13 and the second connecting shaft 23 on the tensile testing machine respectively. During the experiment, an L-shaped test piece cut from the welding area between the side plate and end plate of the new energy lithium battery module shell is taken out. One end of the vertical arm is placed between the inner wall of the first accommodating chamber 102 of the first clamping body 11 and the first support 100, and the other end of the vertical arm is placed between the support part 205 of the second clamping body 21 and the inner wall of the second accommodating chamber 203 of the second support 201. Then, the first clamping member 1011 in the first fixing member 101 and the second clamping member 2021 in the second fixing member 202 are rotated so that the first clamping body 11 and the inner wall of the first accommodating chamber 102 jointly clamp one end of the test piece, and the second clamping body 21 and the support part 205 jointly clamp the other end of the test piece. After both ends of the L-shaped test piece are firmly clamped, the tensile testing machine can be started to conduct a tensile test.

[0044] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A tensile testing fixture, characterized in that, For mounting on a tensile testing machine to clamp the test piece, including a first clamping base and a second clamping base arranged corresponding to the first clamping base; The first clamping base includes a first bearing fixing component and a first clamping body detachably connected to the first bearing fixing component. The first clamping body is arranged correspondingly to the first bearing fixing component to form a first clamping area for clamping one end of the test piece. The second clamping base includes a second bearing fixing component and a second clamping body detachably connected to the second bearing fixing component. The second clamping body is arranged correspondingly to the second bearing fixing component to form a second clamping area for clamping the other end of the test piece. The clamping plane of the first clamping area is perpendicular to the clamping plane of the second clamping area.

2. The tensile testing fixture according to claim 1, characterized in that, The first load-bearing fixing component includes a first support and a first fixing component. The first support has a first receiving chamber, the first clamping body is located in the first receiving chamber, and the first fixing component is movably connected to the first support and detachably connected to the first clamping body.

3. The tensile testing fixture according to claim 2, characterized in that, The first clamping body has a first clamping surface on the side away from the first fixing component, and a second clamping surface is provided on the inner wall of the first accommodating chamber. The first clamping area is formed by the first clamping surface and the second clamping surface being arranged opposite to each other.

4. The tensile testing fixture according to claim 2, characterized in that, The first fixing component includes a first limiting pull member and a plurality of first tightening members arranged at intervals from the first limiting pull member. The first tightening members pass through the first support and abut against the first clamping body. The first limiting pull member passes through the first support and is movably connected within the first clamping body.

5. The tensile testing fixture according to claim 1, characterized in that, The second load-bearing fixing component includes a second support and a second fixing component. The second support has a second receiving chamber, the second clamping body is located in the second receiving chamber, and the second fixing component is movably connected to the second support and detachably connected to the second clamping body.

6. The tensile testing fixture according to claim 5, characterized in that, The second clamping body has a third clamping surface on the side away from the second fixing component. A support portion is provided on the inner wall of the second accommodating chamber near the third clamping surface. A fourth clamping surface is provided on the side of the support portion near the third clamping surface. The second clamping area is formed by the relative arrangement of the third clamping surface and the fourth clamping surface.

7. The tensile testing fixture according to claim 5, characterized in that, The second fixing component includes a second limiting pull member and a plurality of second tightening members arranged at intervals from the second limiting pull member. The second tightening members pass through the second support and abut against the second clamping body. The second limiting pull member passes through the second support and is movably connected within the second clamping body.

8. The tensile testing fixture according to claim 3, characterized in that, The first support is provided with a first clearance groove, which is located on the side of the first support away from the second clamping surface.

9. The tensile testing fixture according to claim 6, characterized in that, The second clamping body is provided with a second clearance groove, which is located on the side of the second clamping body away from the third clamping surface.

10. The tensile testing fixture according to claim 1, characterized in that, The first clamping base further includes a first connecting shaft, and the second clamping base further includes a second connecting shaft. The first connecting shaft is disposed at the end of the first bearing fixing component away from the first clamping body, and the second connecting shaft is disposed at the end of the second bearing fixing component away from the second clamping body. The first connecting shaft and the second connecting shaft are located on the same straight line.

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