Comprehensive testing device for bending, curling and twisting performance of flexible device

Abstract

The utility model provides a flexible device bending, curling and twisting performance comprehensive test device, which comprises a flat plate, a first clamp and a second clamp, and is characterized in that the first clamp and the second clamp are oppositely arranged on the flat plate; wherein the second clamp is movably arranged on the flat plate and is configured to be far away from or close to the first clamp; the first clamp is rotatably arranged on the flat plate, and the axial direction of the first clamp is parallel to the moving direction of the second clamp; the rotating shaft is used for rolling the flexible device; the rotating shaft is rotatably arranged on the flat plate, and the axial direction of the rotating shaft is perpendicular to the moving direction of the second clamp.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible device testing, and specifically to the performance of flexible devices. Background Art

[0002] Flexible electronic devices have good flexibility, stretchability and bendability, and are widely used in wearable devices, electronic skin and other fields. However, during use, flexible electronic devices are usually bent or curled to varying degrees. In order to confirm whether they can still have good performance after multiple uses, they need to be tested in advance. Therefore, simulating the multiple twisting, bending and curling of flexible electronic devices is a necessary part of their reliability experiments.

[0003] However, the experimental devices in existing research can only simulate one situation of flexible electronic devices, and cannot achieve curling, twisting and bending on one device. Therefore, an experimental device is needed to provide working conditions that are closer to actual scenarios and easy to adjust, so as to test the performance of flexible electronic devices after bending, twisting and curling. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the present application proposes a comprehensive testing device for the bending, curling and twisting performance of flexible devices.

[0005] The embodiment of the present application provides a comprehensive testing device for bending, curling and twisting performance of a flexible device, including:

[0006] flat,

[0007] A first clamp and a second clamp, wherein the first clamp and the second clamp are arranged on the flat plate relative to each other; wherein the second clamp is movably arranged on the flat plate and is configured to be away from or close to the first clamp; the first clamp is rotatably arranged on the flat plate, and its axial direction is arranged parallel to the moving direction of the second clamp; and

[0008] A rotating shaft, the rotating shaft is used to roll the flexible device; the rotating shaft is rotatably arranged on the flat plate, and the axial direction of the rotating shaft and the moving direction of the second clamp are perpendicular to each other.

[0009] Optionally, the testing device further comprises:

[0010] A first driving mechanism, the first driving mechanism is disposed on the flat plate and is used to drive the second clamp to move;

[0011] a second driving mechanism, wherein the first driving mechanism is disposed on the flat plate and is used to drive the rotating shaft to rotate;

[0012] A third driving mechanism is disposed on the flat plate and is used to drive the first clamp to rotate.

[0013] Optionally, the first driving mechanism includes a first motor, a screw and a baffle; the screw is rotatably connected to the baffle; the first motor is transmission-connected to the screw; the baffle is fixedly connected to the flat plate;

[0014] The testing device further comprises a first slider and a second slider, wherein the first slider is configured to rotate relative to the baffle, and the second slider is spirally engaged with the lead screw;

[0015] The first clamp is fixedly arranged on the first sliding block, and the second clamp is detachably arranged on the second sliding block.

[0016] Optionally, the first driving mechanism further includes a slide; the slide is fixed on the flat plate; the baffle and the first motor are fixed at opposite ends of the slide.

[0017] Optionally, the testing device further comprises a first platform and a second platform, wherein the first platform and the second platform are arranged on the flat plate and located on both sides of the first driving mechanism;

[0018] The second driving mechanism includes a second motor, a first bracket and a second bracket, the first bracket is arranged on the first platform, and the second bracket is arranged on the second platform;

[0019] The rotating shaft is rotatably connected to the first bracket and the second bracket; the second motor is fixed on the first bracket and connected to the rotating shaft.

[0020] Optionally, the second driving mechanism further comprises a fixing plate and a connecting shaft, wherein the connecting shaft is detachably connected to the fixing plate; and the fixing plate is detachably connected to the second bracket;

[0021] The rotating shaft and the sleeve are arranged on the connecting shaft.

[0022] Optionally, the rotating shaft has a first center hole at its first end, and a second center hole and a third center hole at its second end that are sequentially distributed along its axial direction;

[0023] The first center hole cooperates with the output shaft of the second motor;

[0024] The second center hole cooperates with the connecting shaft, the third center hole cooperates with the outer ring of the bearing, and the inner ring of the bearing cooperates with the connecting shaft.

[0025] Optionally, the first platform and the second platform are lifting platforms.

[0026] Optionally, the rotating shaft is a stepped shaft.

[0027] Optionally, the rotation axis is located on a side of the second clamp facing away from the first clamp, and the second clamp is configured to be able to adjust its opening direction.

[0028] The flexible device bending, curling and twisting performance comprehensive test device of the embodiment of the present application can perform bending, twisting and curling tests on flexible devices. During the bending test, the two ends of the flexible device are clamped between the first clamp and the second clamp respectively; then the second clamp is moved so that the second clamp is away from or close to the first clamp, thereby bending the flexible device. During the twisting test, the two ends of the flexible device are clamped between the first clamp and the second clamp respectively, and then the first clamp is rotated. Since the axial direction of the first clamp is parallel to the moving direction of the second clamp (the relative direction of the first clamp and the second clamp), the flexible device is twisted. During the curling test, one end of the flexible device is clamped on the second clamp, and then the other end is fixed on the rotating shaft, and then the rotating shaft is rotated and the second clamp is moved. Since the axial direction of the rotating shaft is perpendicular to the moving direction of the second clamp (the relative direction of the first clamp and the second clamp), the flexible device is curled. Therefore, the technical solution of the embodiment of the present application can perform twisting, bending and curling tests on the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the comprehensive testing device proposed in the embodiment of the present application;

[0030] Figure 2 is a structural schematic diagram of a first fixture of the comprehensive testing device proposed in an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the structure of a torsion shaft proposed in an embodiment of the present application.

[0032] Reference numerals list

[0033]

[0034] DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Figure 1 and Figure 2As shown, the embodiment of the present application proposes a comprehensive testing device for bending, curling and twisting performance of a flexible device, comprising:

[0037] Tablet 110,

[0038] a first clamp 120 and a second clamp 130, wherein the first clamp 120 and the second clamp 130 are disposed on the flat plate 110 in a relative manner; wherein the second clamp 130 is movably disposed on the flat plate 110 and is configured to be away from or close to the first clamp 120; the first clamp 120 is rotatably disposed on the flat plate 110, and its axial direction is parallel to the moving direction of the second clamp 130; and

[0039] The rotating shaft 140 is used to roll the flexible device; the rotating shaft 140 is rotatably disposed on the flat plate 110 , and the axial direction of the rotating shaft 140 and the moving direction of the second clamp 130 are perpendicular to each other.

[0040] The flexible device bending, curling and twisting performance comprehensive testing device of the embodiment of the present application can perform bending, twisting and curling tests on flexible devices. During the bending test, the two ends of the flexible device are clamped between the first clamp 120 and the second clamp 130 respectively; then the second clamp 130 is moved so that the second clamp 130 is away from or close to the first clamp 120, thereby bending the flexible device. During the twisting test, the two ends of the flexible device are clamped between the first clamp 120 and the second clamp 130 respectively, and then the first clamp 120 is rotated. Since the axial direction of the first clamp 120 is parallel to the moving direction of the second clamp 130 (the relative direction of the first clamp 120 and the second clamp 130), the flexible device is twisted. During the curling test, one end of the flexible device is clamped on the second fixture 130, and the other end is fixed on the rotating shaft 140. Then the rotating shaft 140 is rotated and the second fixture 130 is moved. Since the axial direction of the rotating shaft 140 is perpendicular to the moving direction of the second fixture 130 (the relative direction of the first fixture 120 and the second fixture 130), the flexible device is curled. Therefore, the technical solution of the embodiment of the present application can perform twisting, bending and curling tests on the test device.

[0041] In some embodiments, the present application can also perform a comprehensive test of bending and twisting. During the test, the first fixture 120 is rotated and the second fixture 130 is moved at the same time, so that the flexible device is both bent and twisted, thereby completing the comprehensive test of bending and twisting. That is, using the test device proposed in the embodiment of the present application, a single load test can be completed, and a complex or compound load test can be completed, which can improve the utilization value of the test device and reduce the test efficiency.

[0042] In an embodiment, the test device also includes a test component, which is used to test the electrical properties or mechanical properties of the flexible device. For example, the test component includes a multimeter, which is electrically connected to the flexible device. During the twisting, bending or curling, and bending-torsion integrated test, the electrical properties of the flexible device are tested by the multimeter. For another example, the test component includes a strain gauge, which is provided at different positions of the flexible device. During the twisting, bending or curling, and bending-torsion integrated test, the mechanical properties of the flexible device are tested by the strain gauge. During the test, the multimeter or the strain gauge can be electrically connected to the PC to collect test data in real time, and then collect the change characteristics and maximum change amount of the test parameters (such as resistance value, current value, voltage value, strain value) during the test process.

[0043] In an embodiment, the first clamp 120 and the second clamp 130 may be pneumatically driven, hydraulically driven, or mechanically driven.

[0044] In an embodiment, the testing device also includes: a first driving mechanism 160, the first driving mechanism 160 is arranged on the flat plate 110, and is used to drive the second clamp 130 to move; a second driving mechanism 170, the first driving mechanism 160 is arranged on the flat plate 110, and is used to drive the rotating shaft 140 to rotate; a third driving mechanism 150, the third driving mechanism 150 is arranged on the flat plate 110, and is used to drive the first clamp 120 to rotate.

[0045] In the embodiment, the first driving mechanism 160 includes a first motor 161, a screw rod 162 and a baffle 163; the screw rod 162 is rotatably connected to the baffle 163; the first motor 161 is in transmission connection with the screw rod 162; the baffle 163 is fixedly connected to the flat plate 110; the testing device also includes a first slider 191 and a second slider 192, the first slider 191 is configured to rotate relative to the baffle 163, and the second slider 192 is screw-matched with the screw rod 162; the first fixture 120 is fixedly arranged on the first slider 191, and the second fixture 130 is detachably arranged on the second slider 192. In the embodiment, when the first motor 161 is driven, the flexible device is bent by the cooperation between the screw rod 162 and the second slider 192.

[0046] In the embodiment, the third driving mechanism 150 includes a third motor, which is disposed next to the baffle 163. The driving shaft of the third motor is connected to the first slider 191, so that the first slider 191 can rotate relative to the baffle 163, driving the first fixture 120 to rotate, thereby achieving the twisting of the flexible device.

[0047] In an embodiment, the first driving mechanism 160 further includes a slide 164. The slide 164 is fixed on the flat plate 110, for example, by a screw. The baffle 163 and the first motor 161 are fixed to opposite ends of the slide 164. In some embodiments, the testing device includes an adapter plate, the adapter plate is fixed on the flat plate 110; the slide 164 is fixed to the adapter plate.

[0048] In an embodiment, the testing device further includes a first platform 181 and a second platform 182, the first platform 181 and the second platform 182 are arranged on the flat plate 110 and are located on both sides of the first driving mechanism 160; the second driving mechanism 170 includes a second motor 171, a first bracket 172 and a second bracket 173, the first bracket 172 is arranged on the first platform 181, and the second bracket 173 is arranged on the second platform 182; the rotating shaft 140 is rotatably connected to the first bracket 172 and the second bracket 173; the second motor 171 is fixed to the first bracket 172 and connected to the rotating shaft 140. In an embodiment, both brackets are L-shaped, and the horizontal parts of the first bracket 172 and the second bracket 173 can be connected to the first platform 181 and the second platform 182 respectively by bolts, and the vertical parts can be connected to the second motor 171 and the fixing plate 174 respectively by bolts.

[0049] In an embodiment, the second driving mechanism 170 further includes a fixing plate 174 and a connecting shaft, wherein the connecting shaft is detachably connected to the fixing plate 174; the fixing plate 174 is detachably connected to the second bracket 173; and the rotating shaft 140 is sleeved on the connecting shaft. In an embodiment, the connecting shaft is removed from the fixing plate 174, and the rotating shaft 140 can be replaced to achieve testing of different curling radii.

[0050] In an embodiment, Figure 3 As shown, the rotating shaft 140 has a first center hole 141 at its first end and a second center hole 143 and a third center hole located at its second end and distributed along its axial direction in sequence; the first center hole 141 cooperates with the output shaft of the second motor 171; the second center hole 143 cooperates with the connecting shaft, the third center hole cooperates with the outer ring of the bearing, and the inner ring of the bearing cooperates with the connecting shaft.

[0051] The rotating shaft 140 is a stepped shaft, and the material can be 40Cr. A first center hole 141 is opened at one end, which matches with the extended end of the second motor 171 shaft, and a second center hole 143 and a third center hole are opened at the other end. The second center hole 143 matches with the connecting shaft, and the third center hole is used for the installation of the bearing. The center opening of the fixing plate 174 matches with the connecting shaft, and the top opening can be a threaded hole, so that the connecting shaft and the rotating shaft position can be fixed by screws, and the movement and disassembly of the rotating shaft are convenient. In a further preferred embodiment, the bearing can be an angular contact ball bearing, the inner ring of the bearing matches with the connecting shaft, and the outer ring of the bearing matches with the third center hole.

[0052] In an embodiment, the first platform 181 and the second platform 182 are lifting platforms. In some embodiments, the first platform 181 and the second platform 182 can also be platforms with suitable heights.

[0053] In an embodiment, the rotating shaft 140 is a stepped shaft; the stepped shaft is used because when the curling radius is small, the shaft diameter of the middle shaft end is small, and the shaft diameter needs to be larger because of the center hole at both ends. In some embodiments, when the bending radius is large, the stepped shaft may not be needed.

[0054] In an embodiment, the rotation axis 140 is located on a side of the second fixture 130 away from the first fixture 120, and the second fixture 130 is configured to adjust its opening direction. In an embodiment, when performing a twisting and / or bending test, the opening direction of the second fixture 130 is toward the first fixture 120; when performing a curling test, the opening direction of the second fixture 130 is toward the rotation axis 140. In an embodiment, the second fixture 130 can be configured to be detachable from the second slider 192 to adjust its opening direction. In some embodiments, a fourth motor can be provided on the second slider 192, and the fourth motor drives the second fixture 130 to adjust its opening direction.

[0055] Using the test device of the embodiment of the present application, when performing a bending test;

[0056] 1. By adjusting the position of the second slider 192 through the first driving mechanism 160, the bending radius of the flexible device can be controlled, and the static performance of the flexible device at different bending radii can be measured; 2. The online real-time monitoring function can also be used to measure the dynamic response of the performance of the flexible device during the bending process; 3. The first driving mechanism 160 can also be used to control the movement rate of the second slider 192 to adjust the bending rate of the flexible device, and then explore the influence of different bending rates on the performance of the flexible device; 4. The automatic cyclic bending of the device can be achieved by controlling the first driving mechanism 160 through the controller to control the second slider 192 to perform cyclic reciprocating motion. The bending radius of the device can be controlled by setting the size of the reciprocating motion displacement. The number of bending times of the device can be controlled by setting the number of cycles to measure the flexible device, and then the intelligent test of fatigue characteristics at different bending radii and after different bending times can be achieved; therefore, the automation of the bending test can be achieved by simply setting the relevant motion parameters of the controller.

[0057] During the curling test function: 1. Since the rotating shaft 140 is detachable, the static performance of the flexible device under different curling radii can be measured by changing the radius of the rotating shaft 140; 2. The dynamic response of the performance of the flexible device during the curling process is measured by using the real-time online monitoring function; 3. The curling rate of the device is changed by controlling the rotation speed of the rotating shaft 140 through the second driving mechanism 170 and the moving speed of the second slider 192 through the first driving mechanism 160, and the influence of different curling rates on the performance of the flexible device is explored; 4. The fatigue characteristics of the flexible device under different curling radii and after different curling times are measured. The realization of intelligent testing is to stick one end of the flexible device to be tested to the middle shaft end of the rotating shaft, and the other end is clamped on the second fixture 130. The controller controls the reciprocating rotation of the rotating shaft 140 and the reciprocating motion of the second slider 192 respectively, so that the rotating shaft performs a cyclic reciprocating forward and reverse rotation, and the slider performs a cyclic reciprocating motion, so as to ensure that the linear velocity of the outer surface of the middle shaft end of the rotating shaft is always consistent with the movement speed of the second slider 192, so as to realize the automatic cyclic curling of the device, and the number of cycles can be set to control the number of bending times of the device. Therefore, the automation of curling test can be realized by only setting the relevant motion parameters of the controller.

[0058] During the twist test: 1. Change the rotation angle of the first fixture 120 by the third driving mechanism 150 to measure the static performance of the flexible device at different twist angles; 2. Use the online real-time monitoring function to measure the dynamic response of the performance of the flexible device during the twisting process; 3. Change the torsion speed of the device by changing the rotation speed of the first fixture 120 by changing the third driving mechanism 150 to explore the influence of different torsion rates on the performance of the flexible device; 4. Measure the fatigue characteristics of the flexible device at different torsion angles and after different twist times. The realization of intelligent testing. One end of the device to be tested is fixed by the first fixture 120 and the other end is fixed by the twisting fixture. The third motor of the third driving mechanism 150 is controlled by the controller to deflect the first fixture 120 so that the device to be tested is twisted; the first fixture 120 is made to realize the cyclic torsion of the device by reciprocating forward and reverse rotation. The torsion angle of the flexible device can be controlled by setting the rotation angle of the first fixture 120, and the torsion number of the flexible device can be controlled by setting the number of cycles. Therefore, the automation of the twist test can be realized by setting the relevant motion parameters of the controller.

[0059] When performing a comprehensive bending and twisting test, the first driving mechanism 160 can drive the second fixture 130 to move a certain distance, and then pre-bend the flexible device to have a certain bending radius before performing a twisting test; the third driving mechanism 150 can also drive the first fixture 120 to rotate a certain angle, and then pre-twist the flexible device to have a certain twisting angle before performing a bending test. Complex comprehensive bending and twisting tests can also be performed, such as setting the bending rate and twisting rate to perform comprehensive tests on flexible devices, etc.

[0060] In the technical solution of the present application, the testing device also includes a first controller, a second controller and a third controller, which can be a MYSMC01 motor controller. The first controller is used to control the first motor 161, thereby controlling the movement of the second slider 192, and the second controller is used to control the second motor 171, thereby controlling the movement of the rotating shaft 140; the third controller is used to control the third motor, thereby controlling the rotation of the first fixture 120.

[0061] In a further preferred solution, the device further includes a first driver, a second driver, and a third driver, which are connected to the first controller, the second controller, and the third controller, respectively, and can be DM542 drivers, the first driver is used to drive the first motor 161, the second driver is used to drive the second motor 171, and the third driver is used to drive the third motor. In a further preferred solution, the device further includes a power supply for supplying power to the first driver, the first controller, the second driver, the second controller, the third controller, and the third driver.

[0062] The method for conducting a bending performance test experiment of a flexible electronic device using the experimental device in the utility model is as follows:

[0063] S1: Install the first clamp 120 and the second clamp 130 on the first slider 191 and the second slider 192 respectively, adjust the directions of the two clamps so that their openings face each other, and adjust the second slider 192 to a suitable position (such as Figure 1 It should be noted that the two second clamps on the screw rod are for illustrating the position and direction of the second clamp in different test items)

[0064] S2: Clamp the two ends of the flexible electronic device to be tested on the first clamp 120 and the second clamp 130 respectively to ensure that the two ends of the device will not be loose;

[0065] S3: adjusting the position of the second slider 192 and determining the left stop point of the second slider 192 according to the bending degree of the flexible electronic device to be tested required by the experiment;

[0066] S4: Adjust the position of the second slider 192 to pre-bend the flexible electronic device to be tested, and determine the right stop point of the movement of the second slider 192 to ensure that the bending direction of the device to be tested is consistent each time; in addition, the flexible electronic device can also be flattened before starting the test

[0067] S5: Programming the second slider 192 through the first controller according to the set motion trajectory, motion speed and number of cycles;

[0068] S6: After reaching a preset number of cycles, the performance of the flexible electronic device to be tested is detected.

[0069] The method for conducting a curling performance test experiment of a flexible electronic device using the experimental device in the utility model is as follows:

[0070] S1: Install the second fixture 130 on the second slider 192 and make its opening face the rotating shaft 140; (eg Figure 1 It should be noted that the two second clamps on the screw rod are to illustrate the position and direction of the second clamp in different test items)

[0071] S2: Adjust the first platform 181 and the second platform 182 to the same appropriate height so that the rotating shaft 140 is at a suitable position;

[0072] S3: glue one end of the flexible electronic device to be tested to the middle shaft end of the rotating shaft, and clamp the other end to the second fixture 130 to ensure that both ends of the device will not loosen;

[0073] S4: adjusting the position of the second slider 192 to flatten the flexible electronic device to be tested, and determining the left stop point of the movement of the second slider 192;

[0074] S5: adjusting the position of the second slider 192 so that the flexible electronic device to be tested can be completely curled on the rotating shaft, and determining it as the right stop point of the movement of the second slider 192;

[0075] S6: Programming the motion trajectory, motion speed and number of cycles of the second slider 192 through the first controller, and setting the motion parameters of the rotating shaft through the second controller to ensure that the outermost linear speed of the intermediate shaft end of the rotating shaft is always consistent with the motion speed of the second slider 192;

[0076] S7: Start the first controller and the second controller simultaneously, and after reaching a preset number of cycles, detect the performance of the flexible electronic device to be tested.

[0077] The method for conducting a flexible electronic device distortion performance test experiment using the experimental device in the utility model is as follows:

[0078] S1: Install the first clamp 120 and the second clamp 130 on the first slider 191 and the second slider 192 respectively, adjust the directions of the two clamps so that their openings face each other, and adjust the second slider 192 to a suitable position; (e.g. Figure 1 It should be noted that the two second clamps on the screw rod are for illustrating the position and direction of the second clamp in different test items)

[0079] S2: Clamp the two ends of the flexible electronic device to be tested on the first clamp 120 and the second clamp 130 respectively to ensure that the two ends of the device will not be loose;

[0080] S3: According to the test requirements, the position of the second slider 192 is adjusted (the bending radius is set to 0, that is, the second slider 192 is located at the far end of the first fixture 120), and the reverse rotation stop point of the first fixture 120 is determined according to the torque degree of the flexible electronic device to be tested required by the experiment;

[0081] S4: adjusting the rotation angle of the first fixture 120 to rotate the flexible electronic device to be tested, and determining the forward rotation stop point of the first fixture 120;

[0082] S5: programming the third controller to control the third motor to rotate between the reverse rotation stop point and the forward rotation stop point according to the set rotation speed and number of cycles;

[0083] S6: After reaching a preset number of cycles, the performance of the flexible electronic device to be tested is detected.

[0084] In an embodiment, the device also includes a test component, which includes a test element (such as a multimeter, a strain gauge, etc.) and a test analysis device (such as a PC). The PC collects test data of the test element in real time to analyze the test data in real time.

[0085] In actual use, the screw rod 162 slide 164 of the utility model adopts a single-line ball screw rod 162 slide 164, and the first platform 181 and the second platform 182 are lifting platforms, and high-precision lifting platforms are adopted.

[0086] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A comprehensive testing device for the bending, curling and twisting performance of flexible devices, characterized in that: include: flat, A first clamp and a second clamp, wherein the first clamp and the second clamp are arranged on the flat plate relative to each other; wherein the second clamp is movably arranged on the flat plate and is configured to be away from or close to the first clamp; the first clamp is rotatably arranged on the flat plate, and its axial direction is arranged parallel to the moving direction of the second clamp; as well as A rotating shaft, the rotating shaft is used to roll the flexible device; the rotating shaft is rotatably arranged on the flat plate, and the axial direction of the rotating shaft and the moving direction of the second clamp are perpendicular to each other.

2. The testing device according to claim 1, characterized in that: The testing device also includes: A first driving mechanism, the first driving mechanism is disposed on the flat plate and is used to drive the second clamp to move; a second driving mechanism, wherein the first driving mechanism is disposed on the flat plate and is used to drive the rotating shaft to rotate; A third driving mechanism is disposed on the flat plate and is used to drive the first clamp to rotate.

3. The testing device according to claim 2, characterized in that: The first driving mechanism comprises a first motor, a screw and a baffle; the screw is rotatably connected to the baffle; the first motor is transmission-connected to the screw; the baffle is fixedly connected to the flat plate; The testing device further comprises a first slider and a second slider, wherein the first slider is configured to rotate relative to the baffle, and the second slider is spirally engaged with the lead screw; The first clamp is fixedly arranged on the first sliding block, and the second clamp is detachably arranged on the second sliding block.

4. The testing device according to claim 3, characterized in that: The first driving mechanism further includes a slide table, the slide table is fixed on the flat plate, and the baffle plate and the first motor are fixed at opposite ends of the slide table.

5. The testing device according to claim 2, characterized in that: The testing device further comprises a first platform and a second platform, wherein the first platform and the second platform are arranged on the flat plate and are located on both sides of the first driving mechanism; The second driving mechanism includes a second motor, a first bracket and a second bracket, the first bracket is arranged on the first platform, and the second bracket is arranged on the second platform; The rotating shaft is rotatably connected to the first bracket and the second bracket; the second motor is fixed on the first bracket and connected to the rotating shaft.

6. The testing device according to claim 5, characterized in that: The second driving mechanism further comprises a fixing plate and a connecting shaft, wherein the connecting shaft is detachably connected to the fixing plate; and the fixing plate is detachably connected to the second bracket; The rotating shaft is sleeved on the connecting shaft.

7. The testing device according to claim 6, characterized in that: The rotating shaft has a first center hole at its first end, and a second center hole and a third center hole at its second end that are sequentially distributed along its axial direction; The first center hole cooperates with the output shaft of the second motor; The second center hole cooperates with the connecting shaft, the third center hole cooperates with the outer ring of the bearing, and the inner ring of the bearing cooperates with the connecting shaft.

8. The testing device according to claim 5, characterized in that: The first platform and the second platform are lifting platforms.

9. The testing device according to claim 1, characterized in that: The rotating shaft is a stepped shaft.

10. The testing device according to claim 1, characterized in that: The rotation axis is located at a side of the second clamp facing away from the first clamp, and the second clamp is configured to be able to adjust its opening direction.

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