Test tooling

Abstract

The utility model provides a test fixture, which is used for clamping a tested piece, wherein the tested piece comprises a first part and a second part fixedly connected to the first part, and the test fixture cooperates with a tensile testing machine to test the shear force and peeling force between the first part and the second part, and the test fixture comprises a first clamping mechanism and a second clamping mechanism; the first clamping mechanism is configured to clamp the first part and fix the tested piece in a first posture; the second clamping mechanism is connected to the first clamping mechanism, and is configured to clamp the first part and fix the tested piece in a second posture; wherein the first posture and the second posture are perpendicular to each other; the technical problem of high equipment cost and space cost when performing shear force and peeling force tests on the tested piece can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a test tooling. Background Art

[0002] The tensile testing machine is a widely used mechanical testing equipment, mainly used for mechanical performance tests such as static load, stretching, compression, bending, shearing, tearing, peeling, etc. on various materials. It can perform mechanical performance tests and analysis on various metals, non-metals and composite materials.

[0003] Conventional tensile testing machines can usually only provide tensile force in one direction, that is, the force perpendicular to the workbench and moving away from the workbench. However, in some usage scenarios, there are situations where multiple mechanical properties need to be tested. For example, the cylindrical batteries and tabs welded together in the battery pack need to be tested for shear force and peel force. This requires two tensile testing machines to conduct separate tests, which increases both the cost of the equipment and the space cost. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the utility model provides a test fixture to improve the technical problem of high equipment cost and space cost when performing shear force and peel force tests on the tested parts.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a test fixture for clamping a test piece, the test piece includes a first part and a second part fixedly connected to the first part, the test fixture cooperates with a tensile testing machine to test the shear force and peel force between the first part and the second part, the test fixture includes a first clamping mechanism and a second clamping mechanism; the first clamping mechanism is configured to clamp the first part and fix the test piece in a first posture; the second clamping mechanism is connected to the first clamping mechanism, and is configured to clamp the first part and fix the test piece in a second posture; wherein the first posture and the second posture are perpendicular to each other.

[0006] In the above technical scheme, there are a first clamping mechanism for fixing the inspected piece in a first posture and a second clamping mechanism for fixing the inspected piece in a second posture, and the first posture and the second posture are perpendicular to each other. In the test, the test tool is first installed on the workbench. Since the peeling force mainly focuses on the tensile strength of the second part perpendicular to the surface direction of the first part material, and the shear force mainly focuses on the shear strength of the second part parallel to the surface direction of the first part material, if the inspected piece is clamped to the first clamping mechanism or the second clamping mechanism to be able to perform a peeling force test, then when the inspected piece is clamped to another clamping mechanism, the shear force test can be realized, that is, only the first part needs to be switched between the two clamping positions of the first clamping mechanism and the second clamping mechanism to achieve the effect of changing the force direction of the second part, and the corresponding shear force test or peeling force test can be performed on the same testing machine. Through the application of the test tool, the equipment cost is reduced, and the space cost is also reduced.

[0007] In an example of the test tooling of the utility model, the first clamping mechanism includes a first mounting body and a first fixing device, the first mounting body includes a first accommodating cavity for accommodating the first part, the first accommodating cavity is a cavity adapted for the cylindrical battery, the axis of the first accommodating cavity is parallel to the first direction, and the first fixing device is detachably connected to the first end face of the first mounting body, and the first end face is an end close to the second part during the test.

[0008] In the above technical scheme, by setting a first accommodating cavity for accommodating the first part on the first mounting body, and the first accommodating cavity is a cavity compatible with the cylindrical battery, it is possible to load the cylindrical battery to be tested as a whole into the first accommodating cavity and clamp the first part, which changes the test method in the prior art that requires cutting off one end of the welding connecting bar of the cylindrical battery and then clamping it. This technical scheme does not require destroying the cylindrical battery, which is beneficial to reducing safety hazards and reducing environmental pollution.

[0009] In an example of the test tooling of the utility model, the second clamping mechanism includes a second mounting body and a second fixing device, the second mounting body includes a second accommodating cavity for accommodating the first part, the second accommodating cavity is a cavity adapted for the cylindrical battery, the axis of the second accommodating cavity is parallel to the second direction, the first direction is perpendicular to the second direction, and the second fixing device is detachably connected to the second end face of the second accommodating cavity, and the second end face is an end close to the second part during testing.

[0010] In the above technical scheme, by providing a second accommodating cavity for accommodating the first part on the second mounting body, and the second accommodating cavity is a cavity compatible with the cylindrical battery, it is possible to load the cylindrical battery to be tested as a whole into the second accommodating cavity and clamp the first part, which changes the test method in the prior art that requires cutting off one end of the welding connecting bar of the cylindrical battery and then clamping it. This technical scheme does not require destroying the cylindrical battery, which is beneficial to reducing safety hazards and reducing environmental pollution.

[0011] In an example of the test tooling of the utility model, the first mounting body has a rectangular shape, the first accommodating cavity is arranged on the first mounting body and extends along the length direction of the first mounting body, the first mounting body includes a first structure body and a second structure body that are at least partially separated and arranged along the circumference of the first accommodating cavity, and a detachable connecting device is arranged on the first structure body and / or the second structure body to lock or unlock the first structure body and the second structure body.

[0012] In the above technical solution, the appearance of the first mounting body is set to be a rectangular parallelepiped, which is convenient for processing and has better installation stability with the second clamping mechanism. The first mounting body is divided into a first structure body and a second structure body that are at least partially separated along the circumference of the first accommodating cavity. This can increase the radial size of the first accommodating cavity. Even when the first structure body and the second structure body are completely separated, the first accommodating cavity can be divided into two parts along its circumference. This setting can facilitate the removal of the first part that has completed the test and improve the clamping efficiency of the inspected part.

[0013] In an example of the test tooling of the present utility model, the first structure and the second structure are split structures, the connecting device includes a first connector, a second connector and a connector, the first connector is arranged on both sides of the third end face of the first structure facing the second structure, the second connector is arranged on both sides of the fourth end face of the second structure facing the first structure, and the first connector and / or the second connector are provided with a connector.

[0014] In the above technical solution, the first structure and the second structure are arranged as split structures, and the first accommodating cavity can be divided into two parts along its circumference. This arrangement can facilitate the removal of the first part that has completed the test on the one hand, and on the other hand, it can achieve the clamping of the first part without disassembling the first fixing device, thereby further improving the clamping efficiency of the inspected part.

[0015] In one example of the test tooling of the utility model, the outer shape of the second mounting body is a rectangular parallelepiped, the second accommodating cavity is arranged on the second mounting body and penetrates the second mounting body along the length direction of the second mounting body, one end of the second mounting body in the length direction is connected to the side of the second structure body away from the first structure body, and a through hole is arranged at the position where the first mounting body and the second mounting body are connected, and the through hole connects the second accommodating cavity with the first accommodating cavity.

[0016] In the above technical solution, the outer shape of the second mounting body is set to be a rectangular parallelepiped, which is convenient for processing and has better installation stability with the first mounting body. The first accommodating cavity and the second accommodating cavity are set to be connected, so that the inner side of the first accommodating cavity can give a thrust to the first part to facilitate its removal, thereby improving the clamping efficiency of the inspected part.

[0017] In one example of the test tooling of the utility model, the first fixing device and / or the second fixing device includes a plurality of pressure blocks, the pressure blocks include a mounting portion and a crimping portion, the mounting portion is detachably connected to the first end face and / or the second end face, the crimping portion is connected to the mounting portion, and the crimping portion has a first state of stopping the first part and a second state of avoiding the first part.

[0018] In the above technical scheme, a pressure block is arranged on the first end face, and when the crimping portion enters the first accommodating chamber along the axial projection thereof, it can be achieved that when the tensile head of the tensile testing machine acts on the second part, the movement of the first part is stopped, and when the test is completed, the crimping portion is separated from the first accommodating chamber along the axial projection thereof, so as to avoid the first part and facilitate the removal of the first part. Similarly, a pressure block is arranged on the second end face, and when the crimping portion enters the second accommodating chamber along the axial projection thereof, it can be achieved that when the tensile head of the tensile testing machine acts on the second part, the movement of the first part is stopped, and when the test is completed, the crimping portion is separated from the second accommodating chamber along the axial projection thereof, so as to avoid the first part and facilitate the removal of the first part. This arrangement has the advantages of simple structure and obvious effect.

[0019] In one example of the test tooling of the utility model, the first fixing device and / or the second fixing device each include four pressure blocks, and the four pressure blocks are arranged in pairs on both sides of the first accommodating cavity and / or the second accommodating cavity, and an avoidance structure is provided between the two mounting parts on the same side, so that the crimping part can rotate around the mounting part.

[0020] In the above technical scheme, pressure blocks opposing each other are respectively arranged on the first end face, which can achieve a more stable fixing effect on the first part, and it is convenient to avoid the second part to prevent affecting the test results. The setting of the avoidance structure can achieve that only the mounting part is slightly loosened, and the crimping part can be rotated around the mounting part to make the crimping part avoid the first part, so as to take the first part out of the first accommodating cavity without removing all the pressure blocks. Similarly, pressure blocks opposing each other are respectively arranged on the second end face, which can achieve a more stable fixing effect on the first part, and it is convenient to avoid the second part to prevent affecting the test results. The setting of the avoidance structure can achieve that only the mounting part is slightly loosened, and the crimping part can be rotated around the second mounting part to make the crimping part avoid the first part, so as to take the first part out of the second accommodating cavity without removing all the pressure blocks. This setting improves the clamping efficiency of the inspected part.

[0021] In one example of the test fixture of the utility model, the test fixture also includes a sliding mechanism that slides in cooperation with the workbench of the tensile testing machine. The sliding mechanism is connected to the first clamping mechanism and / or the second clamping mechanism on the side close to the workbench to drive the test fixture to slide along the first direction or the second direction.

[0022] In the above technical solution, the switch between the two test stations can be realized through the sliding connection between the sliding mechanism and the workbench. The setting structure is simple and easy to operate.

[0023] In an example of the test fixture of the present utility model, the sliding mechanism includes a plurality of moving blocks, and the moving blocks include a moving block mounting portion connected to the first clamping mechanism and / or the second clamping mechanism and a T-shaped portion that can be slidably connected to the workbench.

[0024] In the above technical solution, the T-shaped portion is arranged in the movable block, which can not only realize the sliding connection with the workbench, but also limit the movement of the test fixture away from the workbench when subjected to the tensile force of the tensile testing machine. The structure is simple and the effect is obvious.

[0025] The utility model test fixture comprises a first clamping mechanism for fixing the tested piece in a first posture and a second clamping mechanism for fixing the tested piece in a second posture, and the first posture and the second posture are perpendicular to each other. In the test, the test fixture is first installed on the workbench. Since the peeling force mainly focuses on the tensile strength of the second part perpendicular to the surface direction of the first part material, and the shear force mainly focuses on the shear strength of the second part parallel to the surface direction of the first part material, if the tested piece is clamped to the first clamping mechanism or the second clamping mechanism to be able to perform a peeling force test, then when the tested piece is clamped to another clamping mechanism, a shear force test can be achieved, that is, only the first part needs to be switched between the two clamping positions of the first clamping mechanism and the second clamping mechanism to achieve the effect of changing the force direction of the second part, and the corresponding shear force test or peeling force test can be performed on the same testing machine. Through the application of the test fixture, the equipment cost is reduced, and the space cost is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the working state of an embodiment of the test tool of the utility model;

[0028] Figure 2 This is a schematic diagram of a tested part in an embodiment of the test tool of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of an embodiment of the test tool of the utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the first mounting body and the second mounting body in an embodiment of the test fixture of the utility model;

[0031] Figure 5 It is a structural schematic diagram from another angle of an embodiment of the test tool of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the first moving block in an embodiment of the test fixture of the utility model;

[0033] Figure 7 It is a schematic structural diagram of the second moving block in an embodiment of the test tooling of the utility model.

[0034] Component number description

[0035] 100, first clamping mechanism; 110, first mounting body; 111, first accommodating cavity; 112, first end face; 113, first structural body; 114, second structural body; 115, connecting device; 1151, first connecting body; 1152, second connecting body; 120, first fixing device; 121, first pressing block; 1211, first mounting part; 1212, first crimping part; 1213, first avoidance structure; 200, second clamping mechanism; 210, second mounting body; 211, second accommodating cavity; 212, second end face ; 220, second fixing device; 221, second pressing block; 2211, second mounting portion; 2212, second crimping portion; 2213, second avoidance structure; 300, sliding mechanism; 310, moving block; 311, first moving block; 3111, first moving block mounting portion; 3112, first T-shaped portion; 312, second moving block; 3121, second moving block mounting portion; 3122, second T-shaped portion; 400, detected part; 410, first part; 411, cylindrical battery; 420, second part; 421, bar sheet. DETAILED DESCRIPTION

[0036] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0037] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any method, device and material of the prior art similar or equivalent to the method, device and material in the embodiments of the present invention can also be used to implement the present invention.

[0038] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0039] In the embodiments of the present application, the mentioned tested part can belong to any field, and there is no limitation on its shape and material. The tested part includes a first part and a second part fixedly connected, and is intended to detect the mechanical properties of shear force and peel force of the connection between the first part and the second part.

[0040] In this embodiment, the welding connection between the cylindrical battery and the tab in the battery pack is taken as an example, but it should be noted that the technical solution of the present utility model is not limited to this.

[0041] Cylindrical batteries have the advantages of mature production technology, high output yield, low processing cost, good safety performance and heat dissipation performance. Multiple cylindrical batteries are then connected through components such as bars to form a battery pack, which is widely used in various industries.

[0042] As the connector between cylindrical batteries, the tabs need to ensure a stable connection between cylindrical batteries and reasonably distribute current and voltage, playing a key role in the battery pack. The shear force and peel force test of the tabs is an indispensable part of battery module design and production, and is of great significance to ensure the safety and reliability of the battery pack.

[0043] The peel force mainly describes the force required to overcome the adhesion between materials or structures during the peeling process, and focuses on the tensile strength perpendicular to the material surface. The shear force is the force that causes an object to deform under the action of force, and focuses on the shear strength parallel to the material surface. Since the direction of the tensile force on the sheet is different during the shear force and peel force tests, two different testing machines are usually required to test the shear force and peel force of the sheet, which has high equipment and space costs.

[0044] In view of this, the utility model provides a technical solution, a test tool, including two clamping positions, a first clamping mechanism and a second clamping mechanism. It is only necessary to switch the first part between the two clamping positions of the first clamping mechanism and the second clamping mechanism to achieve the effect of changing the force direction of the second part, and the corresponding shear force test or peel force test can be performed on the same testing machine. Through the application of the test tool, the equipment cost is reduced, and the space cost is also reduced.

[0045] See also Figures 1 to 7 , further describing the structure of the test fixture, the test fixture is used to clamp the test piece 400, the test piece 400 includes a first part 410 and a second part 420 fixedly connected to the first part 410, the test fixture cooperates with the tensile testing machine to test the shear force and peeling force between the first part 410 and the second part 420, the test piece 400 can belong to any field, and there is no limitation on its shape and material, the test piece 400 includes a first part 410 and a second part 420 fixedly connected, and is intended to detect the mechanical properties of the shear force and peeling force of the connection between the first part 410 and the second part 420. It should be noted that this test fixture is a fixture that can exist independently of the tensile testing machine, and does not necessarily include the tensile testing machine, as long as it can maintain a certain connection relationship with the tensile testing machine when used in the tensile testing machine.

[0046] See also Figure 1 , Figure 3 and Figure 5The test tooling includes a first clamping mechanism 100 and a second clamping mechanism 200; the first clamping mechanism 100 is configured to clamp the first part 410 and fix the detected part 400 in a first posture. The form of the first clamping mechanism 100 is not limited, and it can be any structure that can clamp the first part 410, for example, including a structure provided with a accommodating cavity designed to conform to the first part 410, a V-shaped clamping mechanism, a clamping block, a clamping mechanism such as a claw, a fixing ring, etc., as long as the first part 410 can be fixedly clamped and the detected part 400 can be fixed in the first posture, the first clamping mechanism 100 can be used to detect peeling force or shear force. Specifically, when the direction of the tension applied to the second part 420 is perpendicular to the connecting surface of the first part 410 and the second part 420, the peeling force is detected, and when the direction of the tension applied to the second part 420 is parallel to the connecting surface of the first part 410 and the second part 420, the shear force is detected.

[0047] See also Figure 1 , Figure 3 and Figure 5 The second clamping mechanism 200 is connected to the first clamping mechanism 100. The connection method of the second clamping mechanism 200 to the first clamping mechanism 100 is not limited, including fixed connection, detachable connection or connection through other adapters. The second clamping mechanism 200 is configured to clamp the first part 410 and fix the detected part 400 to the second posture. The form of the second clamping mechanism 200 is not limited, and it can be any structure that can clamp the first part 410, such as a structure with a accommodating cavity designed to conform to the first part 410, a V-shaped clamping mechanism, a clamping block, a claw, a fixing ring and other clamping mechanisms, as long as it can achieve the fixed clamping of the first part 410 and fix the detected part 400 to the second posture, wherein the first posture The second posture is perpendicular to each other. The second clamping mechanism 200 of the arrangement can be used to detect peeling force or shear force. Specifically, when the direction of the tension on the second part 420 clamped in the first clamping mechanism 100 is perpendicular to the connecting surface of the first part 410 and the second part 420, the peeling force is detected. Since the first posture and the second posture are perpendicular to each other, when the first part 410 is clamped in the second clamping mechanism 200, the direction of the tension on the second part 420 can be parallel to the connecting surface of the first part 410 and the second part 420, and the shear force is detected. Conversely, when the detected piece 400 is clamped in the first clamping mechanism 100 to detect shear force, the detected piece 400 is clamped in the second clamping mechanism 200 to detect peeling force, which will not be repeated here.

[0048] Please note that Figure 3The X direction shown in the figure is parallel to the tensile direction of the tensile testing machine. The first posture of the test piece 400 in the first clamping mechanism 100 is parallel to the X direction. In this embodiment, there are countless planes passing through the X axis, which can all be defined as vertical planes. The first clamping mechanism 100 can be rotated 90° in any of the above vertical planes to obtain a second clamping mechanism 200 that meets the requirements.

[0049] By adopting the above technical solution, it is only necessary to switch the first part 410 between the two clamping positions of the first clamping mechanism 100 and the second clamping mechanism 200 to achieve the effect of changing the force direction of the second part 420, and to perform the corresponding shear force test or peel force test on the same testing machine. Through the application of the test tooling, the equipment cost is reduced, and the space cost is also reduced.

[0050] See also Figure 3 and Figure 5 In an example of the test tooling of the utility model, the first clamping mechanism 100 includes a first mounting body 110 and a first fixing device 120. The first mounting body 110 includes a first accommodating cavity 111 for accommodating the first part 410. The structural form of the first mounting body 110 is not limited, and it can be a rectangular parallelepiped, a cube, a cylinder, a prism or other irregular structures. It can be set as an integral structure, or it can be composed of multiple structures continuously or in segments. As long as the first accommodating cavity 111 can be set on the first mounting body 110, the first accommodating cavity 111 can be a continuous integral cavity, or it can be composed of multiple discontinuous cavities. There is no limitation on this, as long as it can accommodate the first part 410.

[0051] See also Figure 1 and Figure 2 In this embodiment, a cylindrical battery 411 and a tab 421 are used as examples for description. The cylindrical battery 411 is the first part 410, and the tab 421 is the second part 420. Further, the first accommodating cavity 111 is a cavity adapted to the cylindrical battery. It should be noted that the cylindrical battery includes a battery with a cylindrical shape or a battery with a prismatic shape, etc. The structure of the first accommodating cavity 111 depends on the shape of the prismatic battery. Further, the axis of the first accommodating cavity 111 is parallel to the first direction, and the first direction is as follows. Figure 3 The X direction shown, i.e., the axial direction of the first accommodating cavity 111 is parallel to the axis of the cylindrical battery 411. Since the tab 421 is fixedly connected to the end wall of the cylindrical battery 411, when the cylindrical battery 411 is clamped in the first accommodating cavity 111, it is used to detect the peeling force between the tab 421 and the cylindrical battery 411.

[0052] See also Figure 3 and Figure 5The first fixing device 120 is detachably connected to the first end face 112 of the first mounting body 110. The structure and fixing form of the first fixing device 120 are not limited. For example, it can be a clamping type fixation, a pressure type fixation, a threaded type fixation or a magnetic fixation, as long as it can limit the movement of the first part 410 in the force direction during the test. In this embodiment, the first fixing device 120 and the first end face 112 are configured to be detachably connected. On the one hand, it is convenient to remove the first part 410 from the first accommodating cavity 111 by disassembling the first fixing device 120. On the other hand, since the first end face 112 is the end close to the second part 420 during the test, it is closer to the force point and has a better fixing effect.

[0053] In the above technical solution, by setting the first accommodating cavity 111 for accommodating the first part 410 on the first mounting body 110, and the first accommodating cavity 111 is a cavity compatible with the cylindrical battery, the cylindrical battery to be tested can be completely loaded into the first accommodating cavity 111, and the first part 410 can be clamped, which changes the test method in the prior art that requires cutting off one end of the welding connecting bar 421 of the cylindrical battery and then clamping it. This technical solution does not need to destroy the cylindrical battery, which is beneficial to reducing safety hazards and reducing environmental pollution.

[0054] See also Figure 3 and Figure 5 In an example of the test tooling of the utility model, the second clamping mechanism 200 includes a second mounting body 210 and a second fixing device 220. The second mounting body 210 includes a second accommodating cavity 211 for accommodating the first part 410. The structural form of the second mounting body 210 is not limited, and it can be a rectangular parallelepiped, a cube, a cylinder, a prism or other irregular structures. It can be set as an integral structure, or it can be composed of multiple structures continuously or in segments. As long as the second accommodating cavity 211 can be set on the second mounting body 210, the second accommodating cavity 211 can be a continuous integral cavity, or it can be composed of multiple discontinuous cavities. There is no limitation on this, as long as it can accommodate the first part 410.

[0055] See also Figure 3 and Figure 5 The second accommodating cavity 211 is a cavity adapted to a cylindrical battery. It should be noted that a cylindrical battery includes a battery with a cylindrical shape or a battery with a prismatic shape, etc. The structure of the second accommodating cavity 211 depends on the shape of the prismatic battery. Furthermore, the axis of the second accommodating cavity 211 is parallel to the second direction, and the second direction is as follows: Figure 3The Y direction shown, that is, the axial direction of the second accommodating cavity 211 is parallel to the axis of the cylindrical battery 411. Since the tab 421 is fixedly connected to the end wall of the cylindrical battery 411, when the cylindrical battery 411 is clamped in the second accommodating cavity 211, it is used to detect the shear force of the tab 421 and the cylindrical battery 411.

[0056] See also Figure 3 and Figure 5 The second fixing device 220 is detachably connected to the second end face 212 of the second accommodating cavity 211. The structure and fixing form of the second fixing device 220 are not limited. For example, it can be a clamping type fixation, a pressure type fixation, a threaded type fixation or a magnetic fixation, as long as it can limit the movement of the first part 410 in the force direction during the test. In this embodiment, the second fixing device 220 and the second end face 212 are configured to be detachably connected. On the one hand, it is convenient to remove the first part 410 from the second accommodating cavity 211 by disassembling the second fixing device 220. On the other hand, since the second end face 212 is the end close to the second part 420 during the test, it is closer to the force point and has a better fixing effect.

[0057] In the above technical solution, by providing a second accommodating cavity 211 for accommodating the first part 410 on the second mounting body 210, and the second accommodating cavity 211 is a cavity compatible with the cylindrical battery, the cylindrical battery to be tested can be completely loaded into the second accommodating cavity 211, and the first part 410 can be clamped, which changes the test method in the prior art that requires cutting off one end of the welding connecting bar 421 of the cylindrical battery and then clamping it. This technical solution does not need to destroy the cylindrical battery, which is beneficial to reducing safety hazards and reducing environmental pollution.

[0058] See also Figure 3 and Figure 5In an example of the test tooling of the utility model, the first mounting body 110 has a rectangular shape, which is easy to process and has better installation stability with the second clamping mechanism 200. The first accommodating cavity 111 is provided on the first mounting body 110 and extends along the length direction of the first mounting body 110. The first mounting body 110 includes a first structure 113 and a second structure 114 which are at least partially separated and arranged along the circumference of the first accommodating cavity 111. The first structure 113 and the second structure 114 are formed by completely cutting off or partially cutting off along the length direction of the first mounting body 110. The first structure 113 and the second structure 114 are formed by completely cutting off or partially cutting off along the length direction of the first mounting body 110. The cut surface between the structures 114 is not limited and can be a plane, a step surface, an arc surface or other irregular shaped cross-sections. In one embodiment, the first structure 113 and the second structure 114 are completely separated, which can facilitate the removal of the detected component 400 when the two are separated, so as to improve the clamping efficiency of the detected component 400. In another embodiment, the first structure 113 and the second structure 114 are partially separated, and the end away from the first end face 112 is partially connected. This arrangement can still achieve the effect of increasing the first accommodating cavity 111, and it is more convenient to install when one end is connected and the other end is separated.

[0059] For further information, see Figure 3 and Figure 5 In order to enable the first structure 113 and the second structure 114 to lock the first part 410 in the first accommodating cavity 111, a detachable connecting device 115 is provided on the first structure 113 and / or the second structure 114. The connecting device 115 can be in various forms, which are not limited to, such as threaded connection, riveting, pin connection, or a method in which one side is hinged and the other side is detachably connected. The connecting device 115 can lock or unlock the first structure 113 and the second structure 114. When unlocked, it is convenient to take out the test piece 400, and when locked, testing can be carried out.

[0060] See also Figure 3 and Figure 5In an example of the test tooling of the utility model, the first structure 113 and the second structure 114 are split structures, and the connecting device 115 includes a first connecting body 1151, a second connecting body 1152 and a connecting piece. The first connecting body 1151 is arranged on both sides of the third end surface of the first structure 113 facing the second structure 114, and the second connecting body 1152 is arranged on both sides of the fourth end surface of the second structure 114 facing the first structure 113. The shapes of the first connecting body 1151 and the second connecting body 1152 can be various forms. There is no limitation on this, for example, it can be an arc-shaped protrusion, a rectangular strip-shaped protrusion, or a mounting hole can be set on the first structure 113 or the second structure 114, and the first connecting body 1151 and / or the second connecting body 1152 are provided with connecting parts, and the connecting parts can be in various forms, such as screws, pins or buckles. In this embodiment, the first connecting body 1151 and the second connecting body 1152 both adopt rectangular strip-shaped protrusions, and the connecting parts are connected by screws (only the position of the mounting holes is shown in the figure, and the screws are not shown).

[0061] In the above technical solution, the first structure 113 and the second structure 114 are arranged as a split structure, and the first accommodating cavity 111 can be divided into two parts along its circumference. On the one hand, this arrangement can facilitate the removal of the first part 410 that has completed the test, and on the other hand, it can achieve the clamping of the first part 410 without disassembling the first fixing device 120, further improving the clamping efficiency of the test piece 400.

[0062] See also Figure 4 In an example of the test tooling of the utility model, the second mounting body 210 has an outer shape of a rectangular parallelepiped, which is easy to process and has better installation stability with the first mounting body 110. The second accommodating cavity 211 is arranged on the second mounting body 210 and penetrates the second mounting body 210 along the length direction of the second mounting body 210. One end of the second mounting body 210 in the length direction is connected to the side of the second structure 114 away from the first structure 113. A through hole is arranged at the position where the first mounting body 110 and the second mounting body 210 are connected. The through hole connects the second accommodating cavity 211 with the first accommodating cavity 111. The first accommodating cavity 111 and the second accommodating cavity 211 are arranged to be connected, so that the inner side of the first accommodating cavity 111 can give a thrust to the first part 410 to facilitate its removal, thereby improving the clamping efficiency of the detected part 400.

[0063] In an example of the test fixture of the utility model, the first fixture 120 and / or the second fixture 220 include a plurality of pressing blocks, that is, a plurality of pressing blocks may be arranged only on the first fixture 120, or a plurality of pressing blocks may be arranged only on the second fixture 220, or pressing blocks may be arranged on both the first fixture 120 and / or the second fixture 220, and the pressing blocks include a mounting portion and a crimping portion, and the mounting portion is detachably connected to the first end face 112 and / or the second end face 212, that is, the mounting portion of the pressing block arranged on the first fixture 120 is connected to the first end face 112, and the mounting portion of the pressing block arranged on the second fixture 220 is connected to the second end face 212, and the crimping portion is connected to the mounting portion, and the crimping portion has a first state of stopping at the first part 410 and a second state of avoiding the first part 410. For the convenience of distinction, the pressing block arranged on the first fixture 120 is named as the first pressing block 121, and the pressing block arranged on the second fixture 220 is named as the second pressing block 221.

[0064] See also Figure 3 and Figure 5 In an example of the test tooling of the utility model, the first fixing device 120 includes a plurality of first pressing blocks 121, the first pressing block 121 includes a first mounting portion 1211 and a first crimping portion 1212, the first mounting portion 1211 is detachably connected to the first end face 112, the first crimping portion 1212 is connected to the first mounting portion 1211, the first crimping portion 1212 has a first state of stopping the first part 410 and a second state of avoiding the first part 410, specifically, when the first crimping portion 1212 falls into the axial projection of the first accommodating cavity 111, it can be achieved that when the tensile head of the tensile testing machine acts on the second part 420, the movement of the first part 410 is stopped, when the test is completed, the first crimping portion 1212 is moved away from the axial projection of the first accommodating cavity 111, so as to avoid the first part 410 and facilitate the removal of the first part 410.

[0065] See also Figure 3 and Figure 5The second fixing device 220 includes a plurality of second pressing blocks 221, and the second pressing block 221 includes a second mounting portion 2211 and a second crimping portion 2212. The second mounting portion 2211 is detachably connected to the second end face 212, and the second crimping portion 2212 is connected to the second mounting portion 2211. The second crimping portion 2212 has a first state of stopping the first part 410 and a second state of avoiding the first part 410. Specifically, when the second crimping portion 2212 falls into the axial projection of the second accommodating cavity 211, it can be achieved that when the tensile head of the tensile testing machine acts on the second part 420, the movement of the first part 410 is stopped. When the test is completed, the second crimping portion 2212 is removed from the axial projection of the second accommodating cavity 211, so as to avoid the first part 410 and facilitate the removal of the first part 410. This arrangement has the advantages of simple structure and obvious effect.

[0066] Furthermore, in an example of the test tooling of the present invention, the first fixing device 120 and / or the second fixing device 220 each include four pressure blocks, that is, four pressure blocks can be arranged only on the first fixing device 120, or pressure blocks can be arranged only on the second fixing device 220, or pressure blocks can be arranged on both the first fixing device 120 and the second fixing device 220, and the four pressure blocks are arranged in pairs on both sides of the first accommodating cavity 111 and / or the second accommodating cavity 211, the four pressure blocks arranged on the first fixing device 120 are arranged in pairs on both sides of the first accommodating cavity 111, and the four pressure blocks arranged on the second fixing device 220 are arranged in pairs on the second accommodating cavity 211, and an avoidance structure is provided between the two mounting portions on the same side, so that the crimping portion can rotate around the mounting portion.

[0067] See also Figure 3 and Figure 5 In an example of the test fixture of the utility model, the first fixing device 120 includes four first pressing blocks 121, and the four first pressing blocks 121 are arranged opposite to each other on both sides of the first accommodating cavity 111. The first pressing blocks 121 are arranged opposite to each other on the first end surface 112, respectively, so as to achieve a relatively stable fixing effect on the first part 410 and facilitate avoiding the second part 420 to prevent affecting the test results. Furthermore, there is a first avoidance structure 1213 between the two first mounting parts 1211 on the same side, which can enable the first crimping part 1212 to rotate around the first mounting part 1211. The setting of the first avoidance structure 1213 can achieve that only the first mounting part 1211 is slightly loosened, and the first crimping part 1212 can rotate around the first mounting part 1211 to avoid the first part 410, so as to remove the first part 410 from the first accommodating cavity 111, without removing all the first pressing blocks 121. This setting improves the clamping efficiency of the tested part 400.

[0068] Please continue reading Figure 3 and Figure 5 The second fixing device 220 includes four second pressing blocks 221, which are arranged opposite to each other on both sides of the second accommodating cavity 211 in pairs, and a second avoidance structure 2213 is provided between the two second mounting portions 2211 on the same side, which enables the second crimping portion 2212 to rotate around the second mounting portion 2211. Similarly, by arranging the second pressing blocks 221 opposite to each other in pairs on the second end surface 212, a relatively stable fixing effect on the first part 410 can be achieved, and it is convenient to avoid the second part 420 to prevent affecting the test results. The second avoidance structure 2213 can be set so that the second mounting portion 2211 is slightly loosened, and the second crimping portion 2212 can be rotated around the second mounting portion 2211 to avoid the first part 410, so as to take the first part 410 out of the second accommodating cavity 211 without removing all the second pressing blocks 221. This arrangement improves the clamping efficiency of the detected component 400.

[0069] See also Figure 1 , Figure 3 and Figure 5 In an example of the test fixture of the utility model, the test fixture also includes a sliding mechanism 300 that slides in cooperation with the workbench of the tensile testing machine. The sliding mechanism 300 includes various forms, such as a threaded screw pair, a gear rack structure, a guide rail structure, a bearing roller structure, a cylinder, a hydraulic cylinder or a linear motor, etc., which can be adaptively selected according to different working scenes, and there is no limitation on this. The sliding mechanism 300 is connected to the side of the first clamping mechanism 100 and / or the second clamping mechanism 200 close to the workbench, that is, the sliding mechanism 300 can be connected only to the first clamping mechanism 100, or only to the second clamping mechanism 200, or to both at the same time, as long as it can achieve the driving of the test fixture to slide along the first direction or the second direction. Through the sliding connection between the sliding mechanism 300 and the workbench, switching between two test stations can be achieved. The setting has a simple structure and is easy to operate, which is conducive to improving the test efficiency.

[0070] See also Figure 1 , Figure 3 and Figures 5 to 7In an example of the test fixture of the utility model, the sliding mechanism 300 includes a plurality of moving blocks 310, and the moving block 310 includes a moving block 310 mounting portion connected to the first clamping mechanism 100 and / or the second clamping mechanism 200 and a T-shaped portion that can be slidably connected to the workbench. The shape of the moving block 310 mounting portion and the method of connecting to the first clamping mechanism 100 and / or the second clamping mechanism 200 are not limited, and can be a rectangular parallelepiped, a polygonal body or other irregular shapes. The connection method can be welding, threaded connection or pin connection, etc. The moving block 310 mounting portion can be connected only to the first clamping mechanism 100, or only to the second clamping mechanism 200, or to both at the same time, as long as a stable connection with the test fixture can be achieved. The T-block is in the shape of a T, which can not only achieve the T-block to be adapted to and slidably connected to the T-slot set on the workbench, but also achieve the effect of limiting the test fixture from moving away from the workbench when subjected to the tensile force of the tensile tester. The structure is simple and the effect is obvious.

[0071] See also Figure 1 , Figure 3 and Figures 5 to 7 In this embodiment, the sliding mechanism 300 includes three moving blocks 310, which are named as the first moving block 311 and the second moving block 312 according to their shapes for the sake of distinction. The first moving block 311 includes a first moving block mounting portion 3111 and a first T-shaped portion 3112. There are two first moving blocks 311, which are respectively mounted on two opposite sides of the first structure 113 and the second structure 114, and the first moving block 311 connected to the second structure 114 is located on the same side as the second mounting body 210. The second moving block 312 includes a second moving block mounting portion 3121 and a second T-shaped portion 3122. The first moving mounting portion is connected to the side of the second mounting body 210 close to the workbench. The first T-shaped portion 3112 and the second T-shaped portion 3122 are arranged in a colinear or parallel manner, and are both adapted to the T-shaped slot of the workbench and can slide along it. The structure of this arrangement is simple and the movement is reliable.

[0072] The test fixture of the utility model has two clamping positions of a first clamping mechanism and a second clamping mechanism. In the test, the test fixture is first installed on the workbench. It only needs to switch the first part between the first clamping mechanism and the second clamping mechanism to achieve the effect of changing the force direction of the second part, and the corresponding shear force test or peeling force test can be carried out on the same test machine. Through the application of the test fixture, the equipment cost is reduced, and the space cost is also reduced. Therefore, the utility model effectively overcomes some practical problems in the prior art and has a high utilization value and use significance. The above embodiments are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A test tool, characterized in that: Used to clamp the tested piece, the tested piece includes a first part and a second part fixedly connected to the first part, the test fixture cooperates with the tensile testing machine to test the shear force and peeling force between the first part and the second part, and the test fixture includes: A first clamping mechanism, configured to clamp the first portion and fix the detected object in a first posture; a second clamping mechanism connected to the first clamping mechanism and configured to clamp the first portion and fix the detected part in a second posture; The first posture and the second posture are perpendicular to each other.

2. The test tool according to claim 1, characterized in that: The first clamping mechanism includes a first mounting body and a first fixing device, the first mounting body includes a first accommodating cavity for accommodating the first part, the shape of the first accommodating cavity is adapted to the cylindrical battery, the axis of the first accommodating cavity is parallel to the first direction, and the first fixing device is detachably connected to the first end face of the first mounting body, and the first end face is an end close to the second part during testing.

3. The test tool according to claim 2, characterized in that: The second clamping mechanism includes a second mounting body and a second fixing device, the second mounting body includes a second accommodating cavity for accommodating the first part, the shape of the second accommodating cavity is adapted to the cylindrical battery, the axis of the second accommodating cavity is parallel to the second direction, the second direction is perpendicular to the first direction, and the second fixing device is detachably connected to the second end face of the second accommodating cavity, and the second end face is an end close to the second part during testing.

4. The test tool according to claim 3, characterized in that: The first mounting body has a rectangular shape, the first accommodating cavity is arranged on the first mounting body and extends along the length direction of the first mounting body, the first mounting body includes a first structure body and a second structure body that are at least partially separated and arranged along the circumference of the first accommodating cavity, and a detachable connecting device is arranged on the first structure body and / or the second structure body to lock or unlock the first structure body and the second structure body.

5. The test tool according to claim 4, characterized in that: The first structure and the second structure are separate structures, and the connecting device includes a first connector, a second connector and a connector. The first connector is arranged on both sides of the third end surface of the first structure facing the second structure, and the second connector is arranged on both sides of the fourth end surface of the second structure facing the first structure. The connector is arranged on the first connector and / or the second connector.

6. The test fixture according to claim 4, characterized in that: The outer shape of the second mounting body is a rectangular parallelepiped, the second accommodating cavity is arranged on the second mounting body and penetrates the second mounting body along the length direction of the second mounting body, one end of the second mounting body in the length direction is connected to the side of the second structure away from the first structure, and a through hole is arranged at the position where the first mounting body and the second mounting body are connected, and the through hole connects the second accommodating cavity with the first accommodating cavity.

7. The test tool according to claim 3, characterized in that: The first fixing device and / or the second fixing device include a plurality of pressing blocks, each of which includes a mounting portion and a crimping portion, wherein the mounting portion is detachably connected to the first end face and / or the second end face, and the crimping portion is connected to the mounting portion, and the crimping portion has a first state of stopping the first part and a second state of avoiding the first part.

8. The test fixture according to claim 7, characterized in that: The first fixing device and / or the second fixing device each include four pressing blocks, which are arranged in pairs on both sides of the first accommodating cavity and / or the second accommodating cavity, and an avoidance structure is provided between the two mounting portions on the same side, so that the crimping portion can rotate around the mounting portion.

9. The test tool according to any one of claims 3 to 7, characterized in that: The test fixture also includes a sliding mechanism that slides in cooperation with the workbench of the tensile testing machine. The sliding mechanism is connected to the first clamping mechanism and / or the second clamping mechanism on one side close to the workbench to drive the test fixture to slide along the first direction or the second direction.

10. The test fixture according to claim 9, characterized in that: The sliding mechanism includes a plurality of moving blocks, and the moving blocks include a moving block mounting portion connected to the first clamping mechanism and / or the second clamping mechanism and a T-shaped portion that can be slidably connected to the workbench.

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