Deflection testing device and testing method thereof

Abstract

The invention relates to a deflection testing device and a testing method thereof, and relates to the technical field of cable physical property testing. The flexing mechanism is arranged on the rack; the deflection mechanism comprises a driving assembly, a bending assembly, a clamping assembly and a torsion assembly. Wherein the bending assembly is used for driving a cable to bend in a reciprocating manner; the clamping assembly is used for clamping the cable; the twisting assembly is used for driving the clamping assembly and the cable to twist back and forth; the driving assembly is used for driving the bending assembly and the twisting assembly to operate synchronously. And the monitoring mechanism is arranged on the rack and is used for monitoring the change of the electrical performance of the cable in the testing process in real time. The device has the effects that the operation convenience of workers is improved, the number of power sources needed during equipment operation is reduced, and the equipment maintenance difficulty is lowered.

Description

Technical Field

[0001] This application relates to the technical field of cable physical property testing, and particularly to a flexure testing device and a testing method thereof. Background Art

[0002] As an important carrier for power transmission and signal transmission, cables play an irreplaceable role in fields such as electricity, communication, and transportation. With the development of technology, the application scenarios of cables are becoming increasingly diverse, and their performance requirements are also constantly improving. To ensure the reliability of cables under complex working conditions, flexure testing has become an important part of cable quality inspection. By simulating the mechanical stress state in actual use, flexure testing can evaluate the durability and electrical performance stability of cables, providing an important basis for cable design optimization and quality control.

[0003] In response to the need for cable flexure testing, various solutions are commonly used in the industry. A common method is to use a reciprocating bending mechanism to perform uniaxial bending tests on cables. This mechanism drives the cable to perform periodic bending movements through a driving wheel or a swing arm. Another method is to use a torsion device to separately test the anti-torsion performance of cables, applying torque through a rotating fixture to simulate torsional stress. In addition, there are also some testing devices that incorporate a tensile function, simulating the performance of cables in a stressed environment by increasing the tensile force. However, these methods usually only focus on single or limited stress types and are difficult to comprehensively simulate complex usage scenarios. Moreover, in dynamic application scenarios, cables need to withstand multiple composite stresses.

[0004] Currently, in order to accurately simulate this complex stress state and improve the accuracy and reliability of testing, existing flexure testing devices with corresponding composite functions such as bending, torsion, and stretching have emerged. Among them, the mechanism that uses a reciprocating bending mechanism to perform bending tests on cables usually has an independent power source, driving the cable to perform periodic bending movements through a driving wheel or a swing arm. Using a torsion device to test the anti-torsion performance of cables, applying torque through a rotating fixture to simulate torsional stress, also requires an independent power source. By driving the bending and torsion mechanisms respectively through multiple power sources to achieve complex motion patterns, although it can meet the testing requirements to a certain extent, it also results in a complex device structure, high cost, and the device must rely on the coordinated work of multiple power sources, increasing the energy consumption and maintenance difficulty of the device, and being inconvenient to operate, affecting the testing efficiency and economy. Summary of the Invention

[0005] In order to improve the convenience of operation for staff, reduce the number of power sources required during equipment operation, and reduce the equipment maintenance difficulty, this application provides a flexure testing device and a testing method thereof.

[0006] In a first aspect, a flexure testing device provided by this application adopts the following technical solution: A flexure test device, comprising: A frame; A flexure mechanism disposed on the frame; the flexure mechanism includes a driving assembly, a bending assembly, a clamping assembly, and a torsion assembly; wherein the bending assembly is used to drive the cable to bend back and forth; the clamping assembly is used to clamp the cable; the torsion assembly is used to drive the clamping assembly and the cable to twist back and forth; the driving assembly is used to drive the bending assembly and the torsion assembly to operate synchronously; A monitoring mechanism disposed on the frame for real-time monitoring of changes in the electrical performance of the cable during the test.

[0007] By adopting the above technical solution, when testing the cable, first fix the cable to the clamping assembly and the bending assembly, and connect the two ends of the cable to the monitoring mechanism. Then start the driving assembly, and the driving assembly drives the bending assembly and the torsion assembly to operate synchronously, so that the cable simultaneously performs reciprocating bending and torsion movements, simulating the complex stress state of the cable in actual use. The monitoring mechanism real-time monitors the changes in the electrical performance of the cable during the test. When the preset test times / preset test time is reached or the cable is damaged, the driving assembly stops operating. Subsequently, the tester removes the cable and analyzes the data. Among them, through the coordinated cooperation of the driving assembly, the bending assembly and the torsion assembly, the reciprocating bending and torsion movements of the cable can be realized simultaneously, more realistically simulating the mechanical stress borne by the cable in dynamic application scenarios such as mobile devices, robots, and automotive wiring harnesses, improving the accuracy and reliability of the test results. The monitoring mechanism can real-time monitor the changes in the electrical performance of the cable. If the cable is damaged in advance before reaching the preset test times or preset test time, the flexure test device will stop operating in advance, thereby reducing the subsequent ineffective operation time and improving the test efficiency. In addition, the operation of the device only requires one driving assembly to drive the bending assembly and the torsion assembly to operate synchronously, reducing the number of power sources required for the equipment, avoiding the complexity brought by the need for multiple power sources to work together, improving the convenience of operation for the staff, and reducing the equipment maintenance difficulty.

[0008] Optionally, the driving assembly includes: A moving seat slidably connected to the frame; A reciprocating lead screw rotatably connected to the frame, the reciprocating lead screw is threadedly connected to the moving seat, and a driving motor is provided between one end of the reciprocating lead screw and the frame; A transmission disposed between the driving motor and the reciprocating lead screw.

[0009] By adopting the above technical solution, after the driving motor starts, the power is transmitted to the reciprocating lead screw through the transmission, driving the reciprocating lead screw to rotate. Since the moving seat is threadedly connected to the reciprocating lead screw and slidably connected to the frame, the rotation of the reciprocating lead screw is converted into a linear reciprocating motion of the moving seat along the frame. Among them, the transmission can flexibly adjust the moving speed of the moving seat according to actual test requirements, so as to adapt to the test requirements of different specifications of cables and enhance the applicability of the test device.

[0010] Optionally, the torsion assembly includes: A rotating shaft, rotatably connected to the frame. A wire threading through hole is provided along the length direction of the rotating shaft. The cable can be threaded through the wire threading through hole, and the clamping assembly is arranged at one end of the rotating shaft; A winding cylinder, fixedly sleeved outside the rotating shaft; A traction rope, one end of which is wound around the outside of the winding cylinder and the other end is connected to the moving seat; A reset rope, one end of which is wound around the outside of the winding cylinder and the other end is connected to the moving seat, and the winding directions of the traction rope and the reset rope are opposite; Wherein, tensioning devices are respectively arranged between the traction rope and the reset rope and the frame.

[0011] By adopting the above technical solution, when the driving assembly drives the moving seat to reciprocate along the frame, the traction rope and the reset rope move synchronously. When the moving seat moves in one direction, the traction rope pulls the winding cylinder to rotate, so that the rotating shaft drives the cable to twist forward; when the moving seat moves in the reverse direction, the reset rope pulls the winding cylinder to rotate in the reverse direction, and the rotating shaft drives the cable to twist in the reverse direction. The tensioning device ensures that the traction rope and the reset rope always maintain appropriate tension, avoiding slack or jamming phenomena, and ensuring the smoothness and reliability of the twisting action. Among them, the torsion assembly can realize the reciprocating twisting motion of the cable during the test, simulating the complex torsional stress that the cable may bear in actual use. At the same time, through the cooperation of the traction rope and the reset rope, the forward and reverse two-way twisting can be completed without additionally setting up an independent power source, simplifying the overall structure of the flexing mechanism.

[0012] Optionally, the clamping assembly includes: A clamping frame, fixedly arranged at one end of the rotating shaft; Clamping plates, two in number. The two clamping plates are symmetrically and slidably connected to the clamping frame. Clamping grooves are provided on the sides of the two clamping plates close to each other, and the outside of the cable abuts against the inner walls of the clamping grooves. A plurality of telescopic guide rods are arranged between each clamping plate and the clamping frame, and one end of the telescopic guide rod is fixedly connected to the clamping plate; Clamping springs, sleeved outside the telescopic guide rods, and applying a force to the clamping plate to make it approach the other clamping plate; The pull rod is fixedly arranged on the clamping plate, and a linkage component for synchronously driving the two pull rods to separate from each other is arranged between the pull rods on the two clamping plates and the clamping frame.

[0013] By adopting the above technical solution, when clamping the cable through the clamping assembly, first insert the cable into the clamping groove between the two clamping plates. Then, since the clamping spring is sleeved outside the telescopic guide rod and gives the clamping plates a force to approach each other, the two clamping plates can closely fit the outer side of the cable, so as to realize the stable clamping of the cable. When it is necessary to adjust or replace the cable, the two pull rods can be synchronously driven to separate from each other through the linkage component, and then the two clamping plates overcome the acting force of the clamping spring and open, which is convenient for quickly completing the clamping or disassembling operation of the cable. Among them, through the cooperation of the clamping spring, the telescopic guide rod and the linkage component, the synchronous opening and closing of the two clamping plates can be realized, which not only makes the clamping or disassembling operation of the cable simple and fast, but also enables the clamping assembly to have good adaptability and can be applicable to the clamping of cables with different diameters.

[0014] Optionally, the linkage component includes: A button, slidably connected to the clamping frame; A synchronous block, fixedly arranged on the button, and two guiding inclined surfaces are arranged at one end of the synchronous block far away from the button. Two synchronous rods are symmetrically and slidably connected in the clamping frame. Sliding inclined surfaces corresponding to the two guiding inclined surfaces are arranged on one side of the two synchronous rods close to each other. The guiding inclined surfaces and the corresponding sliding inclined surfaces have the same inclination angle and are in contact with each other. The two synchronous rods are in one-to-one correspondence with the two pull rods and are fixedly connected; A return spring, fixedly arranged between the synchronous block and the clamping frame.

[0015] By adopting the above technical solution, when it is necessary to clamp the cable, press the button. The button drives the synchronous block to move. The two synchronous rods on the synchronous block slide along the inclined direction of the guiding inclined surface of the synchronous block and move away from each other. Then the synchronous rods push the pull rods to drive the two clamping plates to separate from each other, so as to open the clamping groove for placing the cable. After releasing the button, under the action of the return spring, the synchronous block returns to its original position, and the synchronous rods drive the pull rods and the clamping plates to approach each other. The clamping spring further enhances the clamping force of the clamping plates on the cable to ensure the stable clamping of the cable. Among them, through the cooperation of the button, the synchronous block and the synchronous rods, etc., the rapid opening and closing of the clamping plates are realized. At the same time, the setting of the return spring enables the whole linkage process to automatically reset without additional operation, improving the use convenience of the device.

[0016] Optionally, a plurality of guide holes corresponding to the plurality of telescopic guide rods are formed in the clamping frame. The telescopic guide rods and the clamping springs are both located in the corresponding guide holes. An adjusting plug is threadedly connected in each guide hole, and one end of the clamping spring abuts against the adjusting plug.

[0017] By adopting the above technical solutions, the telescopic guide rods and the clamping springs in the clamping assembly are limited in the guide holes of the clamping frame, which can effectively improve the structural stability of the clamping assembly and prevent the clamping plate from shifting due to external vibration or torsional force during the cable test. At the same time, by adjusting the cooperation between the plug and the clamping spring, the pre-tightening force of the clamping spring can be conveniently adjusted to adapt to the clamping requirements of cables with different diameters or materials, improving the applicability of the device. In addition, when the clamping spring ages or is damaged, the clamping spring can be quickly replaced through the adjusting plug, extending the service life of the clamping assembly.

[0018] Optionally, the bending assembly includes two flexing wheels rotatably connected to the moving seat and a hanging code tied to one end of the cable away from the clamping assembly. The two flexing wheels are staggeredly distributed along the height direction of the moving seat. The flexing wheel is provided with a receiving groove along its circumferential direction, and the cable abuts against the receiving groove.

[0019] By adopting the above technical solutions, when the driving assembly drives the moving seat to slide along the frame, the two flexing wheels on the moving seat move synchronously. Since the two flexing wheels are staggeredly distributed in the height direction, the cable will form a certain bending angle when passing through the two flexing wheels. With the reciprocating movement of the moving seat, the cable is bent back and forth between the two flexing wheels, simulating the bending stress state of the cable in actual use. In addition, the hanging code tied to one end of the cable provides a certain tensile force for the cable.

[0020] Optionally, an anti-detachment baffle is slidably inserted along the circumferential outer side of the flexing wheel. A snap ring is fixed on the anti-detachment baffle, and a spring pin is fixed on the flexing wheel. The plug end of the spring pin can be inserted into the snap ring.

[0021] By adopting the above technical solutions, the anti-detachment baffle can prevent the cable from slipping out of the receiving groove of the flexing wheel during the bending process, improving the stability of the test process. The anti-detachment baffle realizes the detachable connection of the cable through the cooperation of the snap ring and the spring pin, facilitating the installation and replacement of the cable, and ensuring that the anti-detachment baffle will not accidentally fall off during the test.

[0022] Optionally, the monitoring mechanism includes: A resistance tester, arranged on the frame, for sending out a resistance detection signal; A signal indicator, arranged on the frame; A controller, connected to the signal indicator, the resistance tester, and the drive motor, is configured to receive the resistance detection signal to obtain the resistance of the cable. When the resistance of the cable is greater than a preset resistance value, the controller issues a control signal to the signal indicator and the drive motor, causing the signal indicator to operate and the drive motor to stop operating.

[0023] By adopting the above technical solution, the monitoring mechanism can achieve real-time monitoring of the electrical performance of the cable. During the test, the resistance tester continuously emits a resistance detection signal to detect the resistance value of the cable and transmits the detection result to the controller. When the resistance value of the cable exceeds the preset resistance value, the controller determines that the cable is damaged and immediately issues a control signal. On the one hand, the control signal causes the signal indicator to operate, prompting the operator that the state of the cable has changed. On the other hand, the control signal causes the drive motor to stop operating, thereby terminating the further test operation on the cable. Among them, through real-time monitoring and an automatic shutdown mechanism, the monitoring mechanism can effectively prevent the cable from continuing to bear mechanical stress after being damaged, prevent unnecessary overtesting. At the same time, through the prompting function of the signal indicator, the test personnel can timely learn about the state change of the cable, improving the test efficiency.

[0024] In a second aspect, a test method for a flexure test device provided by the present application is applicable to a flexure test device as described above, and its test steps are as follows: S1. Fix the cable to the clamping assembly and the bending assembly; S2. Connect both ends of the cable to the monitoring mechanism and start the drive assembly; S3. The drive assembly drives the bending assembly and the torsion assembly to operate synchronously, causing the cable to perform reciprocating bending and torsion movements simultaneously; S4. The monitoring mechanism monitors the change in the electrical performance of the cable during the test in real time. When the preset number of test times or preset test time is reached, or when the cable is damaged, the drive assembly stops operating; S5. Remove the cable and analyze the test data.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The operation of the device only requires one drive assembly to drive the bending assembly and the torsion assembly to operate synchronously, reducing the number of power sources required for the device, avoiding the complexity brought by the need for multiple power sources to work together, improving the convenience of operation for the staff, and reducing the difficulty of equipment maintenance; 2. The torsion assembly can achieve the reciprocating torsional movement of the cable during the test, simulating the complex torsional stress that the cable may bear in actual use. At the same time, through the cooperation of the traction rope and the reset rope, the forward and reverse bidirectional torsion can be completed without setting up an additional independent power source, simplifying the overall structure of the flexure mechanism; 3. In the clamping assembly, through the cooperation of the clamping spring, the telescopic guide rod and the linkage components, the synchronous opening and closing of the two clamping plates can be achieved. This not only makes the clamping or disassembling operation of the cable simple and fast, but also enables the clamping assembly to have good adaptability and be applicable to the clamping of cables with different diameters. Moreover, the telescopic guide rod and the clamping spring in the clamping assembly are limited in the guide holes of the clamping frame, which can effectively improve the structural stability of the clamping assembly and prevent the clamping plates from shifting due to external vibration or torsional force during the cable test. At the same time, by adjusting the cooperation between the plug and the clamping spring, the pre-tightening force of the clamping spring can be conveniently adjusted to adapt to the clamping requirements of cables with different diameters or materials, improving the applicability of the device. In addition, when the clamping spring ages or is damaged, the clamping spring can be quickly replaced by adjusting the plug, extending the service life of the clamping assembly; 4. In the linkage components, through the cooperation of the button, the synchronous block and the synchronous rod, etc., the quick opening and closing of the clamping plates are realized. At the same time, the setting of the reset spring enables the entire linkage process to automatically reset without additional operation, improving the convenience of use of the device; 5. In the bending assembly, the anti-detachment baffle can prevent the cable from disengaging from the receiving groove of the flexure wheel during the bending process, improving the stability of the test process. The anti-detachment baffle realizes the detachable connection of the cable through the cooperation of the snap ring and the spring pin, facilitating the installation and replacement of the cable, and ensuring that the anti-detachment baffle will not accidentally fall off during the test; 6. The monitoring mechanism can effectively avoid the cable from continuing to bear mechanical stress after being damaged through real-time monitoring and the automatic shutdown mechanism, preventing unnecessary overtesting. At the same time, through the prompting function of the signal indicator, the test personnel can timely know the state change of the cable, improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the flexure test device of the present application; Figure 2 is a schematic diagram of the partial structure of the flexure test device; Figure 3 is showing Figure 2 a partial enlarged structural diagram of part A in; Figure 4 is a schematic structural diagram of the torsion assembly; Figure 5 is a schematic structural diagram of the clamping assembly; Figure 6 is a partial cross-sectional view of the clamping assembly.

[0027] Description of reference numerals: 1. Frame; 2. Flexure mechanism; 21. Driving assembly; 211. Moving seat; 212. Reciprocating lead screw; 213. Driving motor; 214. Guide rail; 22. Bending assembly; 221. Flexure wheel; 2211. Accommodating groove; 222. Suspension code; 223. Anti-disengagement baffle; 224. Snap ring; 225. Spring pin; 23. Clamping assembly; 231. Clamping frame; 2311. Guide hole; 232. Clamping plate; 2321. Clamping groove; 233. Clamping spring; 234. Pull rod; 235. Linkage component; 2351. Button; 2352. Synchronization block; 2353. Synchronization rod; 2354. Return spring; 236. Telescopic guide rod; 237. Adjusting plug; 24. Torsion assembly; 241. Rotating shaft; 242. Winding drum; 243. Traction rope; 244. Return rope; 245. Tensioning device; 246. Ball bearing; 3. Monitoring mechanism; 31. Resistance tester; 32. Signal indicator. Detailed implementation manners

[0028] The following is a further detailed description of the present application in conjunction with the attached Figures 1-6 drawings.

[0029] After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the Patent Law.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts fall within the scope of protection of the present application.

[0031] The embodiments of the present application disclose a flexure test device. Referring to Figure 1 and Figure 2 , the flexure test device includes a frame 1, a flexure mechanism 2 disposed on the frame 1, and a monitoring mechanism 3. Among them, the flexure mechanism 2 includes a driving assembly 21, a bending assembly 22, a clamping assembly 23, and a torsion assembly 24. Each component cooperates with each other to achieve synchronous bending and torsion of the cable. Specifically, the driving assembly 21 is used to drive the bending assembly 22 and the torsion assembly 24 to operate synchronously. The clamping assembly 23 is used to clamp the cable. The bending assembly 22 is responsible for reciprocating bending of the cable. The torsion assembly 24 is responsible for driving the clamping assembly 23 and the cable to perform reciprocating torsion. The monitoring mechanism 3 is used to monitor the change of the electrical performance of the cable in real time during the test.

[0032] When testing a cable, first fix the cable to the clamping assembly 23 and the bending assembly 22, and connect both ends of the cable to the monitoring mechanism 3. Then start the driving assembly 21. The driving assembly 21 drives the bending assembly 22 and the twisting assembly 24 to operate synchronously, causing the cable to perform reciprocating bending and twisting movements simultaneously, simulating the complex stress state of the cable during actual use. The monitoring mechanism 3 monitors the changes in the electrical performance of the cable in real time during the test. When the preset number of test times / preset test time is reached or the cable is damaged, the driving assembly 21 stops operating. Subsequently, the tester removes the cable and analyzes the data. The operation of the device only requires one driving assembly 21 to drive the bending assembly 22 and the twisting assembly 24 to operate synchronously, reducing the number of power sources required for the device, avoiding the complexity brought by the need for multiple power sources to work together, and improving the convenience of operation for the staff.

[0033] Specifically, referring to Figure 2 , the driving assembly 21 includes a moving seat 211, a reciprocating lead screw 212, a driving motor 213 and a transmission. A guide rail 214 is fixedly provided on the frame 1. The moving seat 211 is slidably connected to the frame 1 through the guide rail 214. The reciprocating lead screw 212 is rotatably connected to the frame 1 and is threadedly connected to the moving seat 211. The driving motor 213 is disposed between one end of the reciprocating lead screw 212 and the frame 1. The input end of the transmission is connected to the driving motor 213, and the output end is connected to the reciprocating lead screw 212. Here, the driving motor 213 can be a stepper motor or a servo motor to ensure precise control of the rotation speed and torque. The transmission can be a planetary gear reducer or a worm and worm gear reducer according to actual needs to achieve adjustment of different speed ranges.

[0034] After the driving motor 213 is started, the power is transmitted to the reciprocating lead screw 212 through the transmission, driving the reciprocating lead screw 212 to rotate. Since the moving seat 211 is threadedly connected to the reciprocating lead screw 212 and is slidably connected to the frame 1, the rotation of the reciprocating lead screw 212 is converted into a linear reciprocating movement of the moving seat 211 along the frame 1.

[0035] Referring to Figures 1-3 , the bending assembly 22 includes two flexing wheels 221 and a hanging weight 222. The two flexing wheels 221 are rotatably connected to the moving seat 211 and are distributed at a dislocation in the height direction. Each flexing wheel 221 is provided with a receiving groove 2211 along its circumferential direction, and the cable can abut against the inside of the receiving groove 2211. The hanging weight 222 is tied to one end of the cable away from the clamping assembly 23. Since the twisting and bending amplitudes of the cable between the two flexing wheels 221 are relatively large, in order to prevent the cable from falling off during the twisting and bending process, an anti-drop baffle 223 is slidably inserted outside the flexing wheel 221. A snap ring 224 is provided on the anti-drop baffle 223, and a spring pin 225 is provided on the flexing wheel 221. One end of the pin of the spring pin 225 can be inserted into the snap ring 224 for fixation.

[0036] When the driving component 21 drives the moving seat 211 to slide along the frame 1, the two flexure wheels 221 on the moving seat 211 move synchronously. Since the two flexure wheels 221 are staggeredly distributed in the height direction, the cable will form a certain bending angle when passing through the two flexure wheels 221. With the reciprocating movement of the moving seat 211, the cable is repeatedly bent between the two flexure wheels 221, simulating the bending stress state of the cable in actual use.

[0037] Refer to Figure 4 and Figure 5 As shown in FIGS.

[0038] When the driving component 21 drives the moving seat 211 to reciprocate along the frame 1, since one end of the traction rope 243 and one end of the reset rope 244 are respectively fixedly connected to both sides of the moving seat 211 along its moving direction, and a cyclic closed loop is formed among the traction rope 243, the moving seat 211, the reset rope 244 and the winding drum 242. When the moving seat 211 moves, it will drive one end of the traction rope 243 and the reset rope 244 to move, while the other ends of the traction rope 243 and the reset rope 244 will move synchronously and in the opposite direction, that is, the total exposed length of the traction rope 243 and the reset rope 244 remains unchanged. Therefore, when the moving seat 211 moves in one direction, the traction rope 243 will pull the winding drum 242 to rotate, so that the exposed part of the traction rope 243 elongates and the exposed part of the reset rope 244 shortens. At this time, the rotating shaft 241 drives the cable to twist forward. When the moving seat 211 moves in the reverse direction, the reset rope 244 will pull the winding drum 242 to rotate in the reverse direction, so that the exposed part of the reset rope 244 elongates and the exposed part of the traction rope 243 shortens. At this time, the rotating shaft 241 drives the cable to twist in the reverse direction. The tensioning device 245 ensures that the traction rope 243 and the reset rope 244 always maintain appropriate tension, avoiding slack or jamming phenomena, and ensuring the smoothness and reliability of the twisting action.

[0039] Referring to Figure 5 and Figure 6 , the clamping assembly 23 includes a clamping frame 231, clamping plates 232, clamping springs 233, pull rods 234 and a linkage member 235. The clamping frame 231 is fixedly provided at one end of the rotating shaft 241. Two clamping plates 232 are symmetrically and slidably connected to the clamping frame 231. A clamping groove 2321 is formed on one side of each clamping plate 232 close to each other, and the outer side of the cable abuts against the inner wall of the clamping groove 2321. A plurality of telescopic guide rods 236 are provided between each clamping plate 232 and the clamping frame 231. One end of the telescopic guide rod 236 is fixedly connected to the clamping plate 232; the clamping spring 233 is sleeved outside the telescopic guide rod 236 and gives the clamping plate 232 a force to approach the other clamping plate 232. A plurality of guide holes 2311 corresponding to the plurality of telescopic guide rods 236 one by one are formed in the clamping frame 231, and the telescopic guide rods 236 and the clamping springs 233 are both located in the corresponding guide holes 2311. In order to facilitate the adjustment of the clamping force, an adjusting plug 237 is threadedly connected in each guide hole 2311, and one end of the clamping spring 233 abuts against the adjusting plug 237. The pull rod 234 is fixedly connected to the clamping plate 232; and the linkage member 235 is arranged between the pull rods 234 on the two clamping plates 232 and the clamping frame 231 for synchronously driving the pull rods 234 on the two clamping plates 232 to separate from each other.

[0040] When clamping the cable by the clamping assembly 23, first insert the cable into the clamping groove 2321 between the two clamping plates 232. Then, since the clamping spring 233 is sleeved outside the telescopic guide rod 236 and gives the clamping plates 232 a force to approach each other, the two clamping plates 232 can closely fit the outer side of the cable, thus realizing the stable clamping of the cable. When it is necessary to adjust or replace the cable, the two pull rods 234 can be synchronously driven to separate from each other through the linkage member 235, and then the two clamping plates 232 overcome the acting force of the clamping spring 233 and open, facilitating the quick completion of the clamping or disassembly operation of the cable. In addition, by adjusting the cooperation between the plug 237 and the clamping spring 233, the pre-tightening force of the clamping spring 233 can be conveniently adjusted, so as to adapt to the clamping requirements of cables with different diameters or materials and improve the applicability of the device; when the clamping spring 233 is aged or damaged, the clamping spring 233 can be quickly replaced by adjusting the plug 237, improving the service life of the clamping assembly 23.

[0041] Referring to Figure 5 and Figure 6 , the linkage member 235 includes a button 2351, a synchronous block 2352, a synchronous rod 2353 and a return spring 2354. The button 2351 is slidably connected to the clamping frame 231. The synchronous block 2352 is fixedly arranged on the button 2351, and two guiding inclined surfaces are arranged at one end of the synchronous block 2352 far away from the button 2351. Two synchronous rods 2353 are symmetrically and slidably connected in the clamping frame 231. Sliding inclined surfaces corresponding to the two guiding inclined surfaces are arranged on one side of the two synchronous rods 2353 close to each other. The guiding inclined surface and the corresponding sliding inclined surface have the same inclination angle and are in mutual contact. The two synchronous rods 2353 are in one-to-one correspondence with the two pull rods 234 and are fixedly connected. The return spring 2354 is fixedly arranged between the synchronous block 2352 and the clamping frame 231 for reset operation.

[0042] When it is necessary to clamp the cable, press the button 2351. The button 2351 drives the synchronous block 2352 to move. The two synchronous rods 2353 on the synchronous block 2352 slide along the inclination direction of the guiding inclined surface of the synchronous block 2352, and the two synchronous rods 2353 move away from each other. Then the synchronous rod 2353 pushes the pull rod 234 to drive the two clamping plates 232 to separate from each other, so as to open the clamping groove 2321 for placing the cable. After releasing the button 2351, under the action of the return spring 2354, the synchronous block 2352 returns to its original position, and the synchronous rod 2353 drives the pull rod 234 and the clamping plate 232 to approach each other. The clamping spring 233 further enhances the clamping force of the clamping plate 232 on the cable, ensuring the stable clamping of the cable.

[0043] Referring to Figure 1 and Figure 2, the monitoring mechanism 3 includes a resistance tester 31, a signal indicator 32 and a controller. The resistance tester 31 and the signal indicator 32 are both arranged on the frame 1, and the controller is connected to the signal indicator 32, the resistance tester 31 and the drive motor 213. The resistance tester 31 is used to send out a resistance detection signal. When the cable breaks due to repeated twisting and bending during the test, the cable forms an open circuit and its resistance value will be infinite. Therefore, when the resistance of the cable is greater than the preset resistance value, it means that the cable has broken. At this time, the controller sends a control signal to the signal indicator 32 and the drive motor 213, causing the signal indicator 32 to operate and stopping the operation of the drive motor 213. The signal indicator 32 can be a signal lamp or a buzzer.

[0044] The monitoring mechanism 3 can realize the real-time monitoring of the electrical performance of the cable. During the test, the resistance tester 31 continuously sends out a resistance detection signal to detect the resistance value of the cable and transmits the detection result to the controller. When the cable breaks due to repeated twisting and bending during the test and forms an open circuit, its resistance value will be infinite. Therefore, when the resistance value of the cable exceeds the preset resistance value, the controller determines that the cable is damaged and will immediately send a control signal. On the one hand, the control signal causes the signal indicator 32 to operate, prompting the operator that the state of the cable has changed. On the other hand, the control signal causes the drive motor 213 to stop operating, thereby terminating the further test operation of the cable.

[0045] This embodiment also discloses a flexing test device and its test method, which is applicable to the flexing test device in the above embodiment. The test steps are as follows: S1. Fix the cable to the clamping assembly 23 and the bending assembly 22; S2. Connect the two ends of the cable to the monitoring mechanism 3 and start the drive assembly 21; S3. The drive assembly 21 drives the bending assembly 22 and the torsion assembly 24 to operate synchronously, so that the cable performs reciprocating bending and torsion movements at the same time; S4. The monitoring mechanism 3 monitors the change of the electrical performance of the cable in real time during the test. When the preset test times or preset test time is reached or the cable is damaged, the drive assembly 21 stops operating; S5. Remove the cable and analyze the test data.

[0046] The implementation principle of a flexure test device and its test method in an embodiment of the present application is as follows: Through the coordinated cooperation of the driving component 21, the bending component 22, and the torsion component 24, the reciprocating bending and torsion movements of the cable can be achieved simultaneously, more realistically simulating the mechanical stress endured by the cable in dynamic application scenarios such as mobile devices, robots, and automotive wire harnesses, improving the accuracy and reliability of the test results. In addition, the monitoring mechanism 3 can monitor the change in the electrical performance of the cable in real time. If the cable is damaged prematurely before reaching the preset number of test times or the preset test time, the flexure test device will stop operating prematurely, thereby reducing the subsequent ineffective operating time and improving the test efficiency.

[0047] The above are all preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A flexure test device, characterized in that, Comprising: A frame (1); A flexing mechanism (2), arranged on the frame (1); the flexing mechanism (2) includes a driving assembly (21), a bending assembly (22), a clamping assembly (23), and a torsion assembly (24); wherein the bending assembly (22) is used to drive the cable to bend back and forth; the clamping assembly (23) is used to clamp the cable; the torsion assembly (24) is used to drive the clamping assembly (23) and the cable to twist back and forth; the driving assembly (21) is used to drive the bending assembly (22) and the torsion assembly (24) to operate synchronously; A monitoring mechanism (3), arranged on the frame (1), for real-time monitoring of the change in the electrical performance of the cable during the test.

2. The flexure test device according to claim 1, characterized in that, The driving assembly (21) includes: A moving seat (211), slidably connected to the frame (1); A reciprocating lead screw (212), rotatably connected to the frame (1), the reciprocating lead screw (212) is threadedly connected to the moving seat (211), and a driving motor (213) is arranged between one end of the reciprocating lead screw (212) and the frame (1); A transmission, arranged between the driving motor (213) and the reciprocating lead screw (212).

3. The flexure test device according to claim 2, wherein, The torsion assembly (24) includes: A rotating shaft (241), rotatably connected to the frame (1), a threading through hole is provided along the length direction of the rotating shaft (241), the cable can be threaded through the threading through hole, and the clamping assembly (23) is arranged at one end of the rotating shaft (241); A winding cylinder (242), fixedly sleeved outside the rotating shaft (241); A traction rope (243), one end is wound around the outside of the winding cylinder (242), and the other end is connected to the moving seat (211); A reset rope (244), one end is wound around the outside of the winding cylinder (242), and the other end is connected to the moving seat (211), and the winding directions of the traction rope (243) and the reset rope (244) are opposite; Wherein, a tensioning device (245) is arranged between the traction rope (243) and the reset rope (244) and the frame (1) respectively.

4. The flexing test device according to claim 3, characterized in that, The clamping assembly (23) includes: A clamping frame (231), fixedly arranged at one end of the rotating shaft (241); Clamping plates (232), two in number, the two clamping plates (232) are symmetrically slidably connected to the clamping frame (231), clamping grooves (2321) are provided on the sides of the two clamping plates (232) close to each other, and the outside of the cable abuts against the inner walls of the clamping grooves (2321); a plurality of telescopic guide rods (236) are arranged between each clamping plate (232) and the clamping frame (231), and one end of the telescopic guide rod (236) is fixedly connected to the clamping plate (232); A clamping spring (233), sleeved outside the telescopic guide rod (236), and applying a force to the clamping plate (232) to make it approach the other clamping plate (232). The pull rod (234) is fixedly arranged on the clamping plate (232), and a linkage component (235) for synchronously driving the two pull rods (234) to separate from each other is arranged between the pull rods (234) on the two clamping plates (232) and the clamping frame (231).

5. The flexure test device according to claim 4, characterized in that, The linkage component (235) includes: A button (2351) slidably connected to the clamping frame (231); A synchronous block (2352) fixedly arranged on the button (2351), and two guiding inclined surfaces are arranged at one end of the synchronous block (2352) away from the button (2351). Two synchronous rods (2353) are symmetrically and slidably connected in the clamping frame (231). Sliding inclined surfaces corresponding to the two guiding inclined surfaces are arranged on one side of the two synchronous rods (2353) close to each other. The guiding inclined surfaces and the corresponding sliding inclined surfaces have the same inclination angle and are in contact with each other. The two synchronous rods (2353) correspond to the two pull rods (234) one by one and are fixedly connected; A return spring (2354) fixedly arranged between the synchronous block (2352) and the clamping frame (231).

6. The flexing test device according to claim 4, characterized in that, A plurality of guiding holes (2311) corresponding to the plurality of telescopic guiding rods (236) one by one are formed in the clamping frame (231). The telescopic guiding rods (236) and the clamping springs (233) are both located in the corresponding guiding holes (2311). An adjusting plug (237) is threadedly connected in each guiding hole (2311), and one end of the clamping spring (233) abuts against the adjusting plug (237).

7. A flexure test device according to claim 2, wherein The bending assembly (22) includes two flexure wheels (221) rotatably connected to the moving seat (211), and a hanging code (222) tied to one end of the cable away from the clamping assembly (23); The two flexure wheels (221) are arranged in a staggered manner along the height direction of the moving seat (211). An accommodating groove (2211) is formed in the circumferential direction of the flexure wheel (221), and the cable abuts against the inside of the accommodating groove (2211).

8. The flexing test device according to claim 7, wherein, An anti - detachment baffle (223) is slidably inserted in the circumferential outer side of the flexure wheel (221). A snap ring (224) is fixedly arranged on the anti - detachment baffle (223), and a spring pin (225) is fixedly arranged on the flexure wheel (221). The inserted pin end of the spring pin (225) can be inserted into the snap ring (224).

9. A flexure test device according to any one of claims 2-8, characterized in that, The monitoring mechanism (3) includes: A resistance tester (31) arranged on the frame (1) for sending out a resistance detection signal; A signal indicator (32) arranged on the frame (1); A controller is connected to the signal indicator (32), the resistance tester (31), and the drive motor (213) for receiving the resistance detection signal to know the resistance of the cable. When the resistance of the cable is greater than a preset resistance value, the controller sends a control signal to the signal indicator (32) and the drive motor (213) to make the signal indicator (32) operate and the drive motor (213) stop operating.

10. A testing method for a flexure testing device, characterized in that, A flexure test device applicable to any one of the above-mentioned claims 1-9, and its test steps are as follows: S1. Fix the cable to the clamping assembly (23) and the bending assembly (22); S2. Connect both ends of the cable to the monitoring mechanism (3), and start the driving assembly (21); S3. The driving assembly (21) drives the bending assembly (22) and the torsion assembly (24) to operate synchronously, so that the cable performs reciprocating bending and torsion movements simultaneously; S4. The monitoring mechanism (3) monitors the change of the electrical performance of the cable in real time during the test. When the preset test times or the preset test time is reached, or the cable is damaged, the driving assembly (21) stops operating; S5. Remove the cable and analyze the test data.

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