A yarn tensile property detection device

Abstract

The application relates to the technical field of yarn tensile property detection, and specifically discloses a yarn tensile property detection device, which comprises a base, a bearing plate fixed on the base, and a controller arranged on the bearing plate; a detection assembly comprising a tensioning plate, a fixed plate and a tensioning piece, the tensioning plate being slidingly arranged on the bearing plate, the tensioning plate being provided with a pressure sensor, the pressure sensor being electrically connected with the controller, the fixed plate being fixedly arranged on the bearing plate, the tensioning piece being arranged on the bearing plate, the tensioning plate and the fixed plate being circumferentially distributed on the bearing plate with the tensioning piece as the center, the tensioning piece being capable of driving the tensioning plate to alternately expand and contract on the bearing plate, and the expansion stroke of the tensioning plate being greater than the contraction stroke in each expansion and contraction stroke of the tensioning plate, so that the yarn is subjected to tensile property detection. The application has the effect of significantly improving the comprehensiveness and accuracy of yarn tensile property detection.

Description

Technical Field

[0001] This application relates to the field of yarn tensile property testing technology, and in particular to a yarn tensile property testing device. Background Technology

[0002] Yarn is an important raw material in the textile industry and is widely used in the production of fabrics, clothing, home textiles and other products. Among them, the strength of yarn is one of the important indicators for measuring its quality. It reflects the yarn's resistance to breakage during the stretching process and is usually expressed as tensile strength or breaking strength. In order to ensure that the strength of yarn meets the design requirements, yarn tensile performance testing devices have emerged.

[0003] Traditional methods for testing the tensile properties of yarn typically use tensile testing machines or tension testing machines. This involves drawing a section of yarn from the yarn spool, applying a uniform tensile force at a specific speed, and measuring the maximum load at which the yarn breaks to determine its strength. Most current yarn tensile testing equipment uses static or dynamic tensile testing methods. In static tensile testing, the tensile testing machine applies a constant tensile force at a linear drive, while a high-precision sensor records the load at yarn breakage. Dynamic testing equipment can simulate periodic stretching at a certain frequency to assess the fatigue strength of the yarn. Furthermore, some yarn testing equipment incorporates video monitoring or image processing technology to observe the deformation of the yarn in real time during the stretching process, providing more detailed performance data.

[0004] Although yarn tensile testing technology is widely used in the textile industry, the aforementioned testing methods mainly focus on the yarn's strength at break. However, in actual use, yarn typically does not break completely but gradually loses its performance after reaching elastic failure. Therefore, existing tensile testing methods cannot effectively reflect the true working condition and durability of yarn in certain application scenarios. Summary of the Invention

[0005] This application provides a yarn tensile property testing device. This device can not only detect the ultimate yield strength of the yarn, but also obtain the elastic failure strength of the yarn in a single test. In addition, it can change the twist of the yarn, thereby realizing the strength test of the same yarn under different twists, effectively improving the comprehensiveness and accuracy of yarn testing.

[0006] The yarn tensile properties testing device provided in this application adopts the following technical solution:

[0007] A yarn tensile property testing device, comprising:

[0008] A base, on which a support plate is fixedly mounted, and on which a controller is mounted;

[0009] The detection assembly includes a tension plate, a fixing plate, and a tensioning element. One end of the tension plate is slidably mounted on the support plate. A pressure sensor is mounted on the tension plate and electrically connected to the controller. One end of the fixing plate is fixed to the support plate. The tensioning element is mounted on the support plate. The tension plate and the fixing plate are circumferentially distributed on the support plate with the tensioning element as the center. The tensioning element can drive the tension plate to alternately expand and contract on the support plate. Within each expansion and contraction sliding stroke of the tension plate, the expansion stroke is greater than the contraction stroke, thereby realizing the tensile performance detection of the yarn.

[0010] By employing the above technical solution, the tensioning plate is alternately expanded and contracted by a tensioning element, simulating the elastic deformation behavior of yarn during actual use. Unlike traditional static tensile testing methods, which typically only test the strength of the yarn at break, this device can continuously monitor the elastic changes of the yarn after being stressed, especially its performance before elastic failure. In actual work, yarn often undergoes continuous stretching and relaxation. The expansion and contraction slip setting can realistically reproduce this process, providing test results that are closer to reality. At the same time, the pressure sensor records the mechanical response of the yarn before and after elastic failure in real time, accurately measuring the elastic strength of the yarn. This makes the test results not only limited to the breaking strength of the yarn, but also comprehensively reflect the durability and working condition of the yarn in actual use, significantly improving the accuracy, reliability, and efficiency of yarn tensile performance testing.

[0011] Optionally, the tensioning component includes a tensioning rod, a sliding block, a mounting cylinder, a first connecting rod, and a second connecting rod. One end of the tensioning rod is fixedly provided with a fixed seat, which is fixedly connected to the bearing plate. The tensioning rod is fixed to the bearing plate via the fixed seat. Multiple sets of first external threads and second external threads are alternately formed on the tensioning rod. The sliding block passes through the tensioning rod and is threadedly connected to it. The mounting cylinder is sleeved on the sliding block, and a first internal thread is formed on its inner wall. The mounting cylinder is threadedly connected to the sliding block. The pitch of the first external thread is set to P1, the pitch of the second external thread is set to P2, and the pitch of the first internal thread is set to P3. P1 and P2 are equal, and P3 is greater than P1. The first external thread and the second external thread have opposite directions of rotation, and the direction of rotation of the first external thread is the same as that of the first internal thread.

[0012] A rotating part is fixed on the first connecting rod. The first connecting rod is rotatably connected to the second connecting rod through the rotating part. The first connecting rod and the second connecting rod combine to form a shear frame structure. One end of the first connecting rod is connected to the end of the tensioning plate near the bearing plate, and the other end of the first connecting rod is rotatably connected to the mounting cylinder. One end of the second connecting rod is rotatably connected to the end of the tensioning plate away from the bearing plate, and the other end of the second connecting rod is rotatably connected to the fixed seat. When the sliding block moves on the tensioning rod, the mounting cylinder slides on the sliding block. The tensioning plate alternately expands and contracts on the bearing plate through the first connecting rod and the second connecting rod.

[0013] By adopting the above technical solution, a first external thread and a second external thread are provided on the tensioning rod. The sliding block is threadedly connected to the tensioning rod, and the mounting sleeve is sleeved on the sliding block and threadedly connected to the sliding block. First, by controlling the pitch (P1, P2, P3) and direction of rotation of the first external thread, the second external thread, and the first internal thread, the tensioning plate can perform precise expansion and contraction movements on the bearing plate. Specifically, by configuring the first and second external threads with opposite rotation directions, the sliding block will rotate alternately in two different directions when moving on the tensioning rod, thus causing the mounting sleeve to reciprocate on the sliding block. Furthermore, since the thread pitch on the mounting sleeve is greater than the thread pitch on the tensioning block, this ensures that the mounting sleeve... The displacement stroke is greater than the stroke of the sliding block on the tensioning rod, thus enabling the tensioning plate to not only generate precise and uniform tension during the stretching of the yarn, but also accurately simulate the actual stretching behavior of the yarn. This helps to better reflect the "elastic failure" stage of the yarn during use—that is, after reaching the elastic limit, the yarn does not break immediately, but gradually loses its performance. This significantly improves the comprehensiveness and accuracy of yarn tensile performance testing. In addition, the shear frame structure formed by the first and second connecting rods makes the expansion and contraction movements of the tensioning plate more stable, avoiding instability caused by excessive torque deviation or excessive vibration. This makes the entire testing device more reliable, able to meet the tensile performance testing needs of different yarns, and more adaptable.

[0014] Optionally, the mounting cylinder is provided with a connecting plate, one end of which is fixedly connected to the mounting cylinder, and the other end of which is fixedly provided with a sliding part. A sliding groove is provided on the side of the fixed plate near the tensioning rod, and the sliding part is slidably disposed in the sliding groove. The connecting plate is slidably connected to the fixed plate through the sliding part.

[0015] By adopting the above technical solution, the main function of the connecting plate is to restrict the movement of the mounting cylinder. That is, when the sliding block moves on the tensioning rod, the sliding block will rotate, and the sliding block is threadedly connected to the mounting cylinder. At this time, the connecting plate restricts the rotation of the mounting cylinder, so the mounting cylinder will move on the sliding block, thereby realizing the expansion and contraction movement of the tensioning plate.

[0016] Optionally, the connecting plate is provided with a driving assembly for driving the sliding block to move. The driving assembly includes a mounting plate, a reduction motor, a lead screw, a guide rod, and a slide block. The mounting plate is fixed to the fixed plate and is located on one side of the connecting plate. The reduction motor is fixed to the mounting plate and is electrically connected to the controller. One end of the lead screw rotatably passes through the mounting plate, and the end of the lead screw passing through the mounting plate is fixedly connected to the reduction motor. The other end of the lead screw is rotatably connected to the fixed seat. One end of the guide rod is fixedly connected to the mounting plate, and the other end of the guide rod is fixedly connected to the fixed seat. The slide block slidably passes through the guide rod and is threadedly connected to the lead screw. The slide block is connected to the sliding block. When the reduction motor drives the slide block to slide on the guide rod, the slide block can drive the sliding block to move on the tensioning rod.

[0017] By adopting the above technical solution, the movement of the sliding block on the tensioning rod can be automatically adjusted using the drive component without manual intervention. At the same time, it ensures that the expansion and contraction process of the tensioning plate on the bearing plate is more controllable. In particular, the electrical connection between the geared motor and the controller enables the entire testing device to automatically adjust the movement of the tensioning plate according to the needs. This not only improves the automation and operational efficiency of the testing process, but also significantly improves the accuracy and stability of the test. Compared with traditional yarn testing devices, it can better simulate the elastic changes of yarn in actual work, adapt to more complex testing needs, and thus provide more reliable and efficient yarn tensile performance testing.

[0018] Optionally, a traction rod is fixed on the slide block, a rotating annular groove is formed on the side of the sliding block near the traction rod, a connecting part is fixed at the end of the traction rod away from the slide block, a plurality of balls are embedded in the connecting part, the connecting part is slidably disposed in the rotating annular groove, and the traction rod is rotatably connected to the sliding block through the connecting part.

[0019] By adopting the above technical solution, the function of the traction rod is to connect the sliding block and the slide seat. At the same time, the rotating annular groove is provided on the sliding block to avoid the traction rod interfering with the rotation of the sliding block. Through the cooperation of the rotating annular groove and the ball bearing, the friction and resistance experienced by the sliding block are reduced when the traction rod pulls the sliding block to move on the tension rod, so as to avoid unnecessary jamming or instability in the rotation of the sliding block.

[0020] Optionally, the fixing plate is provided with a clamping member, which includes a clamping plate and a clamping drive member. An anti-detachment plate is fixedly provided at one end of the fixing plate away from the bearing plate. The clamping plate is slidably disposed on the fixing plate. The clamping drive member is fixedly disposed on the bearing plate. The output end of the clamping drive member is fixedly connected to the clamping plate. The clamping drive member can drive the clamping plate to abut against the anti-detachment plate, thereby clamping and fixing the yarn on the fixing plate.

[0021] By adopting the above technical solution, the clamping plate, controlled by the clamping drive, can closely cooperate with the anti-detachment plate to ensure that the yarn is fixed and does not loosen during the testing process. This avoids inaccurate measurements caused by the yarn loosening or falling off during the strength test. At the same time, the clamping drive drives the clamping plate to clamp the yarn onto the anti-detachment plate, so that both fine and coarse yarns can be accurately clamped, thereby avoiding unstable clamping due to differences in yarn characteristics and improving the versatility of the equipment.

[0022] Optionally, a hinge plate and a dovetail block are fixedly provided at one end of the tensioning plate near the bearing plate. A clearance groove is provided through the hinge plate. A connecting shaft is fixedly provided at one end of the first connecting rod away from the tensioning rod. The connecting shaft is slidably disposed in the clearance groove. A sliding groove is provided on the bearing plate. The dovetail block is slidably disposed in the sliding groove. The tensioning plate is slidably connected to the bearing plate through the dovetail block.

[0023] By adopting the above technical solution, the hinge plate and connecting shaft are designed so that the first connecting rod lifts the tensioning plate as the mounting cylinder moves. This ensures that the first and second connecting rods do not deform due to force during the testing process, thereby improving the reading accuracy of the pressure sensor during yarn testing and ensuring the reliability of the yarn tensile performance test results. The dovetail block cooperates with the groove on the support plate, which not only effectively guides the sliding of the tensioning plate and avoids offset and jamming during the sliding process, but also ensures that the tensioning plate maintains a stable motion trajectory when sliding on the support plate, avoiding offset or error caused by unstable sliding, and further optimizing the accuracy of yarn elastic strength testing.

[0024] Optionally, a winding assembly is also included, comprising a winding motor, a drive gear, a driven gear, and a deflection plate. A support plate is fixedly mounted on the base, the winding motor is fixedly mounted on the support plate, the drive gear is fixedly connected to the output end of the winding motor, a transmission shaft is coaxially fixedly mounted on the drive gear, the deflection plate is disposed on the drive gear, one end of the deflection plate is fixedly connected to the transmission shaft, a rotating shaft is fixedly mounted on the driven gear, the driven gear is rotatably disposed on the end of the deflection plate away from the drive gear via the rotating shaft, the driven gear meshes with the drive gear, and a mounting seat is provided at the end of the rotating shaft away from the driven gear, and a yarn unwinding drum is rotatably disposed on the mounting seat.

[0025] By adopting the above technical solution, the combination of the winding motor and gear transmission system can quickly and continuously provide the required length of yarn and automatically wind the yarn onto the detection component. The entire winding process is automated, reducing the tediousness and time consumption of manual operation and improving testing efficiency.

[0026] Optionally, a speed regulating component is further provided between the mounting base and the rotating shaft. The speed regulating component includes an electromagnet, a sun gear, planet gears, and an internal gear ring. A connecting seat is fixed on the side of the deflection plate opposite to the driven gear. A receiving groove is formed at the end of the connecting seat away from the deflection plate. The rotating shaft rotatably passes through the connecting seat, and the end of the rotating shaft away from the driven gear extends into the receiving groove. A insertion groove is formed at the end of the rotating shaft away from the driven gear. The electromagnet is disposed in the insertion groove and is electrically connected to the controller. The sun gear is slidably disposed in the receiving groove. A speed regulating shaft is fixedly passed through the sun gear. One end of the speed regulating shaft is slidably inserted into the insertion groove, allowing the rotating shaft to drive the speed regulating shaft to rotate. The other end of the speed regulating shaft rotatably passes through the mounting base. A limiting groove is provided on the upper part of the speed regulating shaft. A limiting part is fixedly provided at the end of the speed regulating shaft opposite to the receiving groove. The limiting part is inserted into the limiting groove. The planetary gear and the internal gear ring are both disposed between the mounting base and the connecting base. The planetary gear is rotatably disposed on the end face of the connecting base where the receiving groove is provided. The planetary gear meshes with the sun gear. One end of the internal gear ring is fixedly connected to the mounting base. A rotating part is fixedly provided at the other end of the internal gear ring. The internal gear ring is rotatably disposed on the connecting base through the rotating part. The internal gear ring meshes with the planetary gear. When the electromagnet is started, the electromagnet is attracted to one end of the speed regulating shaft, the sun gear is disengaged from the planetary gear, and the limiting part is inserted into the limiting groove. When the electromagnet is closed, the sun gear meshes with the planetary gear, and the limiting part is disengaged from the limiting groove.

[0027] By adopting the above technical solution, when the mounting base rotates along with the driven gear, if the controller starts the electromagnet, the electromagnet can engage with the end of the speed regulating shaft near the insertion slot. The sun gear is driven to move into the receiving slot, the sun gear disengages from the planet gears, and the limiting part engages with the limiting slot. At this time, the rotation speed of the mounting base is the same as the rotation speed of the driven gear, and the twist of the yarn wound on the detection component will not change significantly. However, once the controller stops the electromagnet, the sun gear engages with the planet gears, and the limiting part disengages from the limiting slot. At this time, the rotation of the mounting base is driven by the rotating shaft to rotate the sun gear, which in turn drives the internal gear ring. The rotation ultimately causes the mounting base to rotate on the connecting base. The rotation speed of the mounting base is less than that of the driven gear. When the yarn is wound on the detection component, the twist of the yarn can be directly changed by changing the direction of the yarn winding. Therefore, the most direct effect of setting the speed regulating component is to change the rotation speed of the mounting base so that it is different from the rotation speed of the driven gear. In this way, the yarn will be subjected to different tensions and rotation directions during the winding process, resulting in a change in the direction of the yarn twist. In this way, the tensile properties of a yarn under different twist conditions can be tested, providing more realistic and comprehensive test results, and more accurately evaluating the strength, elasticity and durability of the yarn.

[0028] Optionally, a guide plate is provided at the end of the drive shaft away from the drive gear. One end of the guide plate is fixedly connected to the drive shaft, and a guide component is provided at the other end of the guide plate. The guide component includes a feed wheel and a feed plate. The feed plate is provided at the end of the guide plate away from the drive shaft. Two sets of feed wheels are provided, and both sets of feed wheels are rotatably mounted on the feed plate. The two sets of feed wheels clamp the yarn.

[0029] By adopting the above technical solution, the yarn feeder can smoothly and accurately pull the yarn and take out the specified length of yarn from the yarn unwinding drum. This method can ensure the stability of yarn tension and length during the test, realize the smooth release of yarn, and avoid the phenomena of yarn knotting, loosening or unevenness during stretching and testing. In this way, the testing process is smoother and not affected by unexpected factors, thus ensuring the accuracy of the test results.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. By using a tensioning element to drive a tensioning plate to alternately expand and contract, the elastic deformation behavior of yarn during actual use is simulated. Unlike traditional static tensile testing methods, which typically only test the strength of the yarn at break, this device can continuously monitor the elastic changes of the yarn after being stressed, especially its performance before reaching elastic failure. In actual work, yarn often undergoes continuous stretching and relaxation. The expansion and contraction sliding setting can realistically reproduce this process, providing test results that are closer to reality. At the same time, the pressure sensor records the mechanical response of the yarn before and after elastic failure in real time, accurately measuring the elastic strength of the yarn. This makes the test results not only limited to the breaking strength of the yarn, but also comprehensively reflect the durability and working status of the yarn in actual use. It helps to better reflect the "elastic failure" stage of the yarn during use—that is, after reaching the elastic limit, the yarn does not break immediately, but gradually loses its performance. In this way, the comprehensiveness and accuracy of yarn tensile performance testing are significantly improved.

[0032] 2. When the mounting base rotates along with the driven gear, if the controller activates the electromagnet, the electromagnet will engage with the end of the speed-regulating shaft near the insertion slot. The sun gear will be driven to move into the receiving slot, disengaging from the planetary gears. The limiting part will then engage with the limiting slot. At this time, the rotational speed of the mounting base is the same as that of the driven gear, and the twist of the yarn wound on the detection component will not change significantly. However, once the controller deactivates the electromagnet, the sun gear engages with the planetary gears, and the limiting part disengages from the limiting slot. The rotation of the mounting base then occurs when the rotating shaft drives the sun gear, which in turn drives the internal gear ring to rotate. Ultimately... The mounting base rotates on the connecting base, with the mounting base rotating at a speed lower than that of the driven gear. When the yarn is wound on the detection component, the yarn twist can be directly changed by altering the direction of yarn winding. Therefore, the most direct effect of the speed regulating component is to change the rotation speed of the mounting base so that it differs from that of the driven gear. This causes the yarn to experience different tensions and rotation directions during winding, resulting in a change in the yarn twist direction. In this way, tensile performance testing of a yarn under different twist conditions can be achieved, providing more realistic and comprehensive test results and more accurately evaluating the yarn's strength, elasticity, and durability.

[0033] 3. The drive assembly automatically adjusts the movement of the sliding block on the tensioning rod without manual intervention. This ensures more controllable expansion and contraction of the tensioning plate on the support plate, especially with the electrical connection between the geared motor and the controller. This allows the entire testing device to automatically adjust the movement of the tensioning plate as needed, improving automation and operational efficiency during testing, as well as significantly enhancing accuracy and stability. Compared to traditional yarn testing devices, it better simulates the elastic changes of yarn in actual operation, adapting to more complex testing requirements and providing more reliable and efficient yarn tensile performance testing. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the yarn tensile performance testing device according to an embodiment of this application.

[0035] Figure 2 This is a schematic diagram of the overall structure of the winding assembly according to an embodiment of this application.

[0036] Figure 3 This is a schematic diagram of the overall structure of the detection component in an embodiment of this application.

[0037] Figure 4 This is a schematic diagram of the overall structure of the tensioning component in an embodiment of this application.

[0038] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle.

[0039] Figure 6 This is an overall schematic diagram of the winding assembly of the present application, in which the yarn is wound around the detection assembly.

[0040] Reference numerals: 1. Base; 11. Bearing plate; 111. Slide groove; 12. Support plate;

[0041] 2. Controller;

[0042] 3. Detection components; 31. Tensioning plate; 311. Hinge plate; 3111. Clearance groove; 312. Dovetail block; 32. Fixing plate; 321. Sliding groove; 322. First fixing plate; 323. Second fixing plate; 33. Tensioning component; 331. Tensioning rod; 3311. Fixing seat; 332. Sliding block; 3321. Rotating ring groove; 333. Mounting cylinder; 334. First connecting rod; 3341. Rotating part; 3342. Connecting shaft; 335. Second connecting rod; 336. Connecting plate; 3361. Sliding part; 34. Pressure sensor; 35. Anti-detachment plate; 36. Clamping component; 361. Clamping plate; 362. Clamping drive component; 37. Position sensor;

[0043] 4. Drive assembly; 41. Mounting plate; 42. Gear motor; 43. Lead screw; 44. Guide rod; 45. Slide; 451. Traction rod; 452. Connecting part;

[0044] 5. Winding assembly; 51. Winding motor; 52. Drive gear; 521. Drive shaft; 53. Driven gear; 531. Rotating shaft; 5311. Insertion slot; 54. Deflection plate; 541. Connecting seat; 5411. Receiving slot; 55. Mounting seat; 551. Limiting slot; 56. Speed ​​regulating component; 561. Electromagnet; 562. Sun gear; 5621. Speed ​​regulating shaft; 5622. Limiting part; 563. Planetary gear; 564. Internal gear ring; 5641. Rotating part; 565. Return spring; 57. Wire guide plate; 58. Wire guide component; 581. Wire feeding reel; 582. Wire feeding plate. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0046] This application discloses a yarn tensile property testing device.

[0047] Reference Figure 1 The yarn tensile performance testing device includes a base 1, a controller 2, a winding assembly 5, a testing assembly 3, and a drive assembly 4. The base 1 serves as the mounting foundation for the entire yarn tensile performance testing device. The controller 2, the winding assembly 5, and the testing assembly 3 are all mounted on the base 1. The testing assembly 3 is mounted on one side of the winding assembly 5, and the drive assembly 4 is mounted on the testing assembly 3.

[0048] The controller 2 can control all electrical components in the entire detection device; the winding assembly 5 can automatically wind the yarn to be tested onto the detection assembly 3, and when the winding assembly 5 winds the yarn onto the detection assembly 3, the winding assembly 5 can change the twist of the yarn, thereby realizing the detection of the same yarn with different twists; the detection assembly 3 can perform tensile performance testing on the yarn; the drive assembly 4 can drive the detection assembly 3 to perform tensile performance testing.

[0049] Reference Figure 1 A bearing plate 11 and a support plate 12 are fixed on the base 1 respectively. The bearing plate 11 is located on one side of the length direction of the base 1, and the support plate 12 is located on the other side of the length direction of the base 1. The controller 2 is installed on the bearing plate 11.

[0050] Reference Figure 1 and Figure 2In this embodiment of the application, the winding assembly 5 includes a winding motor 51, a driving gear 52, a driven gear 53, a deflection plate 54, a speed regulating component 56, a guide plate 57, and a guide component 58. The winding motor 51 is fixed on the support plate 12. The winding motor 51 can be configured as a servo motor. The winding motor 51 is electrically connected to the controller 2.

[0051] The drive gear 52 is disposed on the side of the support plate 12 away from the winding motor 51. The drive gear 52 is fixedly connected to the output end of the winding motor 51. A transmission shaft 521 is coaxially fixed on the side of the drive gear 52 away from the support plate 12. A deflection plate 54 is disposed on the side of the drive gear 52 away from the support plate 12. One end of the deflection plate 54 is fixedly connected to the transmission shaft 521.

[0052] Driven gear 53 is mounted on deflection plate 54. A rotating shaft 531 is coaxially fixed to driven gear 53. A connecting seat 541 is fixed to the side of deflection plate 54 opposite to driven gear 53. The connecting seat 541 is cylindrical, and a receiving groove 5411 is formed at the end of the connecting seat 541 away from deflection plate 54. The rotating shaft 531 rotatably passes through the connecting seat 541, and the end of the rotating shaft 531 away from driven gear 53 extends into the receiving groove 5411. A slot 5311 is provided at one end of the driven gear 53. The driven gear 53 is rotatably mounted on the deflection plate 54 via a rotating shaft 531. The driven gear 53 meshes with the driving gear 52. A mounting base 55 is provided at the end of the rotating shaft 531 away from the driven gear 53. The mounting base 55 can be used to mount the yarn feeder to be inspected. A speed regulating component 56 is provided between the mounting base 55 and the rotating shaft 531. The speed regulating component 56 can change the rotational speed of the mounting base 55 relative to the rotating shaft 531.

[0053] Reference Figure 2 In the embodiment of the application, the speed regulating component 56 includes an electromagnet 561, a sun gear 562, planet gears 563, an internal gear ring 564, and a return spring 565. The electromagnet 561 is fixedly mounted on the inner wall of the insertion slot 5311 and is electrically connected to the controller 2. The sun gear 562 is slidably mounted in the receiving slot 5411, and a speed regulating shaft 5621 is fixedly mounted on the sun gear 562. One end of the speed regulating shaft 5621 is configured as a hexagonal prism, and the other end is configured as a cylinder. The speed regulating shaft 5621 is configured as a hexagonal prism. The end of the rotating shaft 531 is always slidably inserted into the insertion slot 5311, so that the rotating shaft 531 can drive the speed regulating shaft 5621 to rotate synchronously. The other end of the speed regulating shaft 5621 is slidably mounted on the mounting base 55. The mounting base 55 has a limiting slot 551, which is a hexagonal slot and has a chamfer at the opening. The end of the speed regulating shaft 5621 away from the receiving slot 5411 is fixed with a limiting part 5622, which is a hexagonal block, and the limiting part 5622 is inserted into the limiting slot 551.

[0054] The planetary gears 563 are provided in three sets. All three sets of planetary gears 563 are rotatably mounted on the end face of the connecting seat 541 with the receiving groove 5411. The three sets of planetary gears 563 are circumferentially distributed around the connecting seat 541 as the axis. The planetary gears 563 mesh with the sun gear 562. One end of the internal gear ring 564 is fixedly provided with an end cap. The side of the end cap facing away from the internal gear ring 564 is fixedly connected to the mounting seat 55. The other end of the internal gear ring 564 is fixedly provided with a rotating part 5641. The internal gear ring 564 is rotatably mounted on the end face of the connecting seat 541 with the receiving groove 5411 through the rotating part 5641. The internal gear ring 564 meshes with the planetary gears 563.

[0055] The reset spring 565 is disposed in the receiving groove 5411. The reset spring 565 is sleeved on one end of the speed regulating shaft 5621 near the insertion groove 5311. One end of the reset spring 565 abuts against the sun gear 562, and the other end of the reset spring 565 is fixedly connected to the inner wall of the receiving groove 5411.

[0056] Reference Figure 1 and Figure 2 In this embodiment, the guide plate 57 is disposed at the end of the drive shaft 521 away from the drive gear 52. One end of the guide plate 57 is fixedly connected to the drive shaft 521, and the other end of the guide plate 57 is provided with a guide hole.

[0057] The wire guide 58 is mounted on the wire guide plate 57. The wire guide 58 includes a wire feeding reel 581 and a wire feeding plate 582. The wire feeding plate 582 is fixedly mounted on one end of the wire guide plate 57 away from the drive shaft 521. A rotating tube is fixedly mounted on one end of the wire feeding plate 582. The rotating tube is rotatably disposed in the wire hole. The wire feeding plate 582 is rotatably disposed on the wire guide plate 57 through the rotating tube. The wire feeding reel 581 has a wire feeding groove. There are two sets of wire feeding reels 581. Both sets of wire feeding reels 581 are rotatably disposed on the wire feeding plate 582, and the two sets of wire feeding reels 581 are arranged vertically.

[0058] More specifically, the yarn to be tested is installed on the mounting base 55, a section of yarn is pulled out and passed through the wire hole and the yarn feeding groove in sequence, and at this time, the two sets of yarn feeding wheels 581 clamp the yarn, and a section of yarn is pulled out from the yarn feeding spool; then the controller 2 controls the winding motor 51 to start, the driving gear 52 drives the driven gear 53 to rotate, the driven gear 53 drives the mounting base 55 to make a circular motion around the detection component 3, and while the mounting base 55 rotates around the detection component 3, the mounting base 55 will also rotate on its own axis, that is, when the yarn is wound on the detection component 3;

[0059] When the mounting base 55 rotates along with the driven gear 53, if the controller 2 controls the electromagnet 561 to start, the electromagnet 561 can engage with the end of the speed regulating shaft 5621 near the insertion slot 5311. The sun gear 562 is driven to move into the receiving slot 5411, the return spring 565 is compressed, the sun gear 562 disengages from the planet gear 563, and the limiting part 5622 engages with the limiting slot 551. At this time, the rotation speed of the mounting base 55 is the same as the rotation speed of the driven gear 53, and the twist of the yarn wound on the detection component 3 will not change significantly.

[0060] When the controller 2 controls the electromagnet 561 to close, the return spring 565 pushes the sun gear 562 out of the receiving groove 5411, the sun gear 562 meshes with the planet gear 563, and the limiting part 5622 disengages from the limiting groove 551. At this time, the rotation of the mounting base 55 is driven by the rotating shaft 531 to drive the speed regulating shaft 5621 to rotate, the speed regulating shaft 5621 drives the sun gear 562 to rotate, and the sun gear 562 in turn drives the internal gear ring 564 to rotate, so that the mounting base 55 rotates on the connecting base 541. The rotation speed of the mounting base 55 is less than the rotation speed of the driven gear 53. When the yarn is wound on the detection component 3, the twist of the yarn can be changed directly by changing the direction of the yarn winding.

[0061] Reference Figure 3 , Figure 4 and Figure 5 In this embodiment, the detection component 3 includes a tension plate 31, a fixing plate 32, a tensioning member 33, and a clamping member 36. The tension plate 31 is mounted on the support plate 11 and is configured as an arc-shaped plate. A hinge plate 311 and a dovetail block 312 are provided on the tension plate 31. The hinge plate 311 is fixed at one end of the tension plate 31 near the support plate 11, and the dovetail block 312 is fixed at one end of the tension plate 31 near the support plate 11. The hinge plate 311 is located on one side of the dovetail block 312. A clearance groove 3111 is provided through the hinge plate 311, and a sliding groove 111 is provided on the support plate 11. The dovetail block 312 is slidably disposed in the sliding groove 111, and the tension plate 31 is slidably disposed on the support plate 11 through the dovetail block 312. A pressure sensor 34 is provided on the tensioning plate 31. The pressure sensor 34 is located on the side of the tensioning plate 31 away from the hinge plate 311, and the pressure sensor 34 is electrically connected to the controller 2.

[0062] The fixing plate 32 is also set as an arc plate, and the arc of the fixing plate 32 is the same as the arc of the tensioning plate 31. One end of the fixing plate 32 is fixed on the bearing plate 11.

[0063] The tensioning component 33 includes a tensioning rod 331, a sliding block 332, a mounting cylinder 333, a connecting plate 336, a first connecting rod 334, and a second connecting rod 335. A fixing seat 3311 is fixedly mounted on one end of the tensioning rod 331, which is fixedly inserted onto the bearing plate 11. The tensioning rod 331 is fixed to the bearing plate 11 via the fixing seat 3311, and is coaxial with the transmission shaft 521. Multiple sets of first external threads and second external threads are alternately formed on the tensioning rod 331. It is worth noting that the pitch of the first external thread is set to P1, the pitch of the second external thread is set to P2, and the pitch of the first internal thread is set to P3. P1 and P2 are equal, and P3 is greater than P1. Simultaneously, the first external thread and the second external thread have opposite directions of rotation, while the direction of rotation of the first external thread is the same as that of the first internal thread.

[0064] In this embodiment, two sets of tension plates 31 and fixing plates 32 are provided. The two sets of tension plates 31 and the two sets of fixing plates 32 are distributed in a circle around the tension rod 331 as the axis. The two sets of tension plates 31 are symmetrically arranged around the tension rod 331 as the center. The two sets of tension plates 31 are located on both sides of the arc direction of the first set of fixing plates 32. It is worth noting that, for ease of understanding, the two sets of fixing plates 32 are respectively set as the first fixing plate 322 and the second fixing plate 323.

[0065] The sliding block 332 is cylindrical with open ends and passes through the tensioning rod 331. The sliding block 332 has a second internal thread and can be threadedly connected to the first and second external threads on the tensioning rod 331. The mounting cylinder 333 is cylindrical with open ends and is sleeved on the sliding block 332. The length of the mounting cylinder 333 is much greater than the length of the sliding block 332. The inner wall of the mounting cylinder 333 has a first internal thread and the outer peripheral wall of the sliding block 332 has a third external thread. The mounting cylinder 333 is threadedly connected to the sliding block 332. The mounting cylinder 333 is fixed with an anti-detachment ring to prevent the sliding block 332 from slipping out of the mounting cylinder 333.

[0066] A connecting plate 336 is mounted on a mounting cylinder 333. One end of the connecting plate 336 is fixedly connected to the mounting cylinder 333, and the other end of the connecting plate 336 is fixedly provided with a sliding part 3361. A sliding groove 321 is provided on the side of the second fixed plate 323 near the tension rod 331. The sliding part 3361 is slidably disposed in the sliding groove 321. The connecting plate 336 is slidably connected to the second fixed plate 323 through the sliding part 3361.

[0067] A rotating part 3341 is fixed on the first connecting rod 334, and a connecting hole is opened on the second connecting rod 335. The rotating part 3341 is rotatably disposed in the connecting hole. The first connecting rod 334 is rotatably connected to the second connecting rod 335 through the rotating part 3341. The first connecting rod 334 and the second connecting rod 335 are combined to form a shear frame structure.

[0068] Multiple sets of first hinge seats are fixed on the mounting cylinder 333. One end of the first connecting rod 334 is rotatably connected to the mounting cylinder 333 through the first hinge seat. A connecting shaft 3342 is fixed on the end of the first connecting rod 334 away from the mounting cylinder 333. The connecting shaft 3342 is slidably disposed in the relief groove 3111. The first connecting rod 334 is rotatably connected to the hinge plate 311 through the connecting shaft 3342.

[0069] A second hinge seat is fixed at the end of the tensioning plate 31 away from the bearing plate 11. Both the second hinge seat and the hinge plate 311 are located on the side of the tensioning plate 31 near the tensioning rod 331. One end of the second connecting rod 335 is rotatably connected to the second hinge seat. Multiple sets of third hinge seats are fixed on the fixed seat 3311, and the other end of the second connecting rod 335 is rotatably connected to the third hinge seat. When the sliding block 332 moves on the tensioning rod 331, the first connecting rod 334 and the second connecting rod 335 can drive the tensioning plate 31 to alternately expand and contract on the bearing plate 11.

[0070] More specifically, in the initial state, the sliding block 332 is located at one end of the mounting cylinder 333 near the bearing plate 11. The sliding block 332 is threadedly connected to the first external thread on the tensioning rod 331. When the sliding block 332 moves toward the bearing plate 11 on the tensioning rod 331, the sliding block 332 itself will rotate. The mounting cylinder 333 is threadedly connected to the sliding block 332, and the mounting cylinder 333 is limited by the connecting plate 336, so that the mounting cylinder 333 slides and extends toward the bearing plate 11 on the sliding block 332. The tensioning plate 31 slides upward in the vertical direction on the bearing plate 11 through the first connecting rod 334 and the second connecting rod 335.

[0071] When the sliding block 332 completes its first external thread stroke on the tension rod 331 and begins to connect with the second external thread, the sliding block 332 begins to reverse. The mounting cylinder 333 begins to move away from the bearing plate 11 on the sliding block 332. At this time, the sliding block 332 is moving closer to the bearing plate 11. However, because the pitch P1 of the first external thread is less than the pitch P3 of the first internal thread, the travel distance of the sliding block 332 on the tension rod 331 is less than the travel distance of the mounting cylinder 333 on the sliding block 332 for each rotation. Therefore, when the sliding block 332 completes its second external thread stroke, it begins to enter the next first... During the external thread stroke, the tensioning plate 31 will slightly retract on the bearing plate 11 relative to the previous outward expansion, so that the tensioning plate 31 alternately expands and contracts on the bearing plate 11. Since the yarn has a certain elasticity, during the detection process, when the pressure sensor 34 detects that the pressure value of the yarn reaction on the tensioning plate 31 suddenly decreases to zero during a certain contraction and sliding process of the tensioning plate 31, it means that the detected yarn has reached the elastic failure. When the pressure sensor 34 detects that the pressure value of the yarn reaction on the tensioning plate 31 suddenly decreases to zero during a certain expansion and sliding process of the tensioning plate 31, it means that the detected yarn has reached the breaking yield limit.

[0072] Reference Figure 3 and Figure 4 In this embodiment of the application, the clamping member 36 includes a clamping plate 361 and a clamping drive member 362. The end of the fixed plate 32 away from the bearing plate 11 is fixedly provided with an anti-detachment plate 35. Multiple sets of anti-detachment parts are fixedly provided on the anti-detachment plate 35. The multiple sets of anti-detachment parts are arranged at equal intervals along the length direction of the anti-detachment plate 35.

[0073] It is worth noting that the side of the anti-detachment plate 35 facing away from the fixing plate 32 is close to the side of the conductor plate 57 facing away from the deflection plate 54.

[0074] The clamping plate 361 is an arc-shaped plate, slidably mounted on the fixed plate 32. Multiple sets of anti-detachment parts are also fixed on the side of the clamping plate 361 facing the anti-detachment plate 35, arranged at equal intervals along the length of the clamping plate 361. A clamping drive component 362 is fixed on the support plate 11 and electrically connected to the controller 2. The clamping drive component 362 can be a cylinder, with its output end passing through the support plate 11 and fixedly connected to the clamping plate 361. The clamping drive component 362 can drive the clamping plate 361 to abut against the anti-detachment plate 35, thereby clamping and fixing the yarn to the fixed plate 32. A position sensor 37 is mounted on the mounting cylinder 333, and the position sensor 37 is electrically connected to the controller 2.

[0075] Since there are two sets of fixed plates 32, there are also two sets of clamping members 36 and position sensors 37. The two sets of clamping members 36 and position sensors 37 are arranged in a circle around the tension rod 331.

[0076] More specifically, the guide plate 57 rotates around the tension rod 331 as the drive gear 52 rotates. Since a section of yarn is pre-extracted, when the guide plate 57 rotates from the first fixed plate 322 to the second fixed plate 323, the guide plate 57 passes by the position sensor 37, and the pre-extracted yarn is exactly between the anti-detachment plate 35 and the clamping plate 361. The controller 2 controls the clamping drive 362 to extend, thereby fixing the yarn.

[0077] Conversely, the clamping plate 361 on the second fixed plate 323 slides towards the bearing plate 11 under the drive of the clamping drive member 362. When the guide plate 57 passes the position sensor 37 at the second fixed plate 323, the clamping plate 361 on the second fixed plate 323 clamps the yarn under the drive of the clamping drive member 362. At the same time, the clamping plate 361 on the first fixed plate 322 will release the clamping of the yarn, and so on alternately. After the yarn is wound with the corresponding number of turns according to actual needs, the controller 2 will control the clamping drive member 362 to drive the clamping plate 361 to clamp the yarn.

[0078] Because of the electrical connection between the controller 2 and the position sensor 37, the clamping component 36 can automatically complete the clamping and releasing process, reducing manual intervention. Operators no longer need to manually clamp the yarn, thus saving a lot of time and labor costs, making it suitable for batch testing and continuous production line use.

[0079] Of course, in other embodiments of this application, the clamping drive 362 may also be configured as other types of linear actuators, such as hydraulic rods or electric actuators.

[0080] Reference Figure 3 , Figure 4 and Figure 5In this embodiment, the drive assembly 4 includes a mounting plate 41, a reduction motor 42, a lead screw 43, a guide rod 44, and a slide 45. The mounting plate 41 is fixed on the first fixed plate 322, located on the side of the first fixed plate 322 near the tension plate 31, and on the side of the connecting plate 336 opposite to the bearing plate 11. The reduction motor 42 is fixed on the mounting plate 41 and electrically connected to the controller 2. One end of the lead screw 43 rotatably passes through the mounting plate 41, and the end of the lead screw 43 passing through the connecting rod is fixedly connected to the reduction motor 42. The other end of the lead screw 43 is rotatably connected to the fixed seat 3311. One end of the guide rod 44 is fixedly connected to the mounting plate 41, and the other end of the guide rod 44 is fixedly connected to the fixed seat 3311. The slide 45 slidably passes through the guide rod 44 and is threadedly connected to the lead screw 43.

[0081] A traction rod 451 is fixed on the slide block 45. A rotating ring groove 3321 is opened on the side of the sliding block 332 near the bearing plate 11. The rotating ring groove 3321 and the sliding block 332 are coaxially arranged. A connecting part 452 is fixed at the end of the traction rod 451 away from the slide block 45. The connecting part 452 is disc-shaped and has multiple sets of balls embedded on it. The connecting part 452 is slidably disposed in the rotating ring groove 3321. The traction rod 451 is rotatably connected to the sliding block 332 through the connecting part 452.

[0082] When the geared motor 42 drives the slide block 45 to slide on the guide rod 44, the traction rod 451 can drive the sliding block 332 to move on the tension rod 331, thereby realizing the sliding of the tension plate 31 on the bearing plate 11.

[0083] The implementation principle of the yarn tensile performance testing device in this embodiment is as follows: A yarn feeding spool is installed on the mounting base 55. A yarn end is pulled out from the yarn feeding spool. The yarn end is then passed through the wire guide hole and the feeding groove. The feeding wheel 581 clamps the yarn and pulls out a section of yarn. Next, the controller 2 controls the winding motor 51 to start, and the driven gear 53 drives the mounting base 55 to perform circular motion around the testing component 3. The mounting base 55 rotates on the deflection plate 54. The wire guide plate 57 passes the position sensor 37 on one side of the first fixed plate 322. The clamping plate 361 clamps the yarn, and the wire guide plate 57... When the position sensor 37 at the second fixed plate 323 passes by, the clamping plate 361 on the second fixed plate 323 clamps the yarn under the drive of the clamping drive 362. At the same time, the clamping plate 361 on the first fixed plate 322 will release the clamp on the yarn. This process is repeated alternately. The yarn is wound on the detection component 3. Then, the controller 2 controls the winding motor 51 to turn off and the reduction motor 42 to turn on. The tension plate 31 alternately expands and contracts on the support plate 11. The controller 2 detects the strength value of the yarn based on the pressure value change of the pressure sensor 34 in different strokes of the tension plate 31.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A yarn tensile property testing device, characterized in that, include: A base (1) is fixedly provided on the base (1), and a controller (2) is provided on the support plate (11). The detection component (3) includes a tension plate (31), a fixing plate (32), and a tensioning element (33). One end of the tension plate (31) is slidably disposed on the bearing plate (11). A pressure sensor (34) is disposed on the tension plate (31). The pressure sensor (34) is electrically connected to the controller (2). One end of the fixing plate (32) is fixed on the bearing plate (11). The tensioning element (33) is disposed on the bearing plate (11). The tension plate (31) and the fixing plate (32) are circumferentially distributed on the bearing plate (11) with the tensioning element (33) as the center. The tensioning element (33) can drive the tension plate (31) to alternately expand and contract on the bearing plate (11). In each expansion and contraction sliding stroke of the tension plate (31), the expansion stroke of the tension plate (31) is greater than the contraction stroke, thereby realizing the tensile performance detection of the yarn. It also includes a winding assembly (5), which includes a winding motor (51), a drive gear (52), a driven gear (53), and a deflection plate (54). A support plate (12) is fixedly mounted on the base (1). The winding motor (51) is fixedly mounted on the support plate (12). The drive gear (52) is fixedly connected to the output end of the winding motor (51). A transmission shaft (521) is coaxially fixedly mounted on the drive gear (52). The deflection plate (54) is disposed on the drive gear (52). One end of the rotating plate (54) is fixedly connected to the transmission shaft (521). A rotating shaft (531) is fixedly mounted on the driven gear (53). The driven gear (53) is rotatably mounted on the end of the deflection plate (54) away from the driving gear (52) through the rotating shaft (531). The driven gear (53) meshes with the driving gear (52). A mounting base (55) is provided at the end of the rotating shaft (531) away from the driven gear (53). The yarn unwinding drum is rotatably mounted on the mounting base (55). A speed regulating component (56) is also provided between the mounting base (55) and the rotating shaft (531). The speed regulating component (56) includes an electromagnet (561), a sun gear (562), a planetary gear (563), and an internal gear ring (564). A connecting seat (541) is fixed on the side of the deflection plate (54) away from the driven gear (53). A receiving groove (5411) is opened at the end of the connecting seat (54) away from the deflection plate (54). The rotating shaft (531) is rotatably mounted on the connecting seat (541), and the end of the rotating shaft (531) away from the driven gear (53) extends into the receiving groove (5411). A slot (5311) is provided at the end away from the driven gear (53). The electromagnet (561) is disposed in the slot (5311) and is electrically connected to the controller (2). The sun gear (562) is slidably disposed in the receiving groove (5411). A speed regulating shaft (5621) is fixedly disposed on the sun gear (562). One end of the speed regulating shaft (5621) is slidably inserted into the slot (5311). The rotating shaft (531) can drive the speed regulating shaft (5621) to rotate. The other end of the speed regulating shaft (5621) is rotatably disposed on the mounting base (55). A limited space is provided on the mounting base (55). The speed regulating shaft (5621) is fixedly provided with a limiting part (5622) at one end away from the receiving groove (5411) in the slot (551). The limiting part (5622) is inserted into the limiting groove (551). The planetary gear (563) and the internal gear ring (564) are both disposed between the mounting base (55) and the connecting base (541). The planetary gear (563) is rotatably disposed on the end face of the connecting base (5411) where the receiving groove (5411) is opened. The planetary gear (563) meshes with the sun gear (562). One end of the internal gear ring (564) is fixedly connected to the mounting base (55), and the other end of the internal gear ring (564) is fixedly provided with a limiting part (5622). The rotating part (5641) rotatably mounts the internal gear ring (564) on the connecting seat (541). The internal gear ring (564) meshes with the planetary gear (563). When the electromagnet (561) is started, the electromagnet (561) is attracted to one end of the speed regulating shaft (5621), the sun gear (562) disengages from the planetary gear (563), and the limiting part (5622) is inserted into the limiting groove (551). When the electromagnet (561) is closed, the sun gear (562) meshes with the planetary gear (563), and the limiting part (5622) disengages from the limiting groove (551).

2. The yarn tensile property testing device according to claim 1, characterized in that: The tensioning component (33) includes a tensioning rod (331), a sliding block (332), a mounting sleeve (333), a first connecting rod (334), and a second connecting rod (335). One end of the tensioning rod (331) is fixedly provided with a fixing seat (3311), which is fixedly connected to the bearing plate (11). The tensioning rod (331) is fixedly mounted on the bearing plate (11) via the fixing seat (3311). Multiple sets of first and second external threads are alternately formed on the tensioning rod (331). The sliding block (332) passes through the tensioning rod (331). On the sliding block (332), the sliding block (332) is threadedly connected to the tensioning rod (331), the mounting cylinder (333) is sleeved on the sliding block (332), the inner wall of the mounting cylinder (333) is provided with a first internal thread, the mounting cylinder (333) is threadedly connected to the sliding block (332); the pitch of the first external thread is set to P1, the pitch of the second external thread is set to P2, the pitch of the first internal thread is set to P3, P1 and P2 are equal, and P3 is greater than P1, the first external thread and the second external thread have opposite directions of rotation, and the direction of rotation of the first external thread is the same as the direction of rotation of the first internal thread; A rotating part (3341) is fixedly provided on the first connecting rod (334). The first connecting rod (334) is rotatably connected to the second connecting rod (335) through the rotating part (3341). The first connecting rod (334) and the second connecting rod (335) are combined to form a shear frame structure. One end of the first connecting rod (334) is connected to the end of the tensioning plate (31) near the bearing plate (11), and the other end of the first connecting rod (334) is rotatably connected to the mounting cylinder (333). The second connecting rod (335) is rotatably connected to the second connecting rod (335). One end of the connecting rod (335) is rotatably connected to the end of the tensioning plate (31) away from the bearing plate (11), and the other end of the second connecting rod (335) is rotatably connected to the fixed seat (3311). When the sliding block (332) moves on the tensioning rod (331), the mounting cylinder (333) slides on the sliding block (332). The tensioning plate (31) alternately expands and contracts on the bearing plate (11) through the first connecting rod (334) and the second connecting rod (335).

3. The yarn tensile property testing device according to claim 2, characterized in that: A connecting plate (336) is provided on the mounting cylinder (333). One end of the connecting plate (336) is fixedly connected to the mounting cylinder (333), and the other end of the connecting plate (336) is fixedly provided with a sliding part (3361). A sliding groove (321) is provided on the side of the fixed plate (32) near the tension rod (331). The sliding part (3361) is slidably disposed in the sliding groove (321), and the connecting plate (336) is slidably connected to the fixed plate (32) through the sliding part (3361).

4. The yarn tensile property testing device according to claim 3, characterized in that: The connecting plate (336) is provided with a driving assembly (4) for driving the sliding block (332) to move. The driving assembly (4) includes a mounting plate (41), a reduction motor (42), a lead screw (43), a guide rod (44), and a slide block (45). The mounting plate (41) is fixed on the fixed plate (32) and is located on one side of the connecting plate (336). The reduction motor (42) is fixed on the mounting plate (41) and is electrically connected to the controller (2). One end of the lead screw (43) is rotatably inserted through the mounting plate (41), and the end of the lead screw (43) passing through the mounting plate (41) is connected to the slide block (332). The geared motor (42) is fixedly connected, the other end of the lead screw (43) is rotatably connected to the fixed seat (3311), one end of the guide rod (44) is fixedly connected to the mounting plate (41), the other end of the guide rod (44) is fixedly connected to the fixed seat (3311), the slide (45) slides through the guide rod (44), the slide (45) is threadedly connected to the lead screw (43), and the slide (45) is connected to the sliding block (332). When the geared motor (42) drives the slide (45) to slide on the guide rod (44), the slide (45) can drive the sliding block (332) to move on the tension rod (331).

5. The yarn tensile property testing device according to claim 4, characterized in that: A traction rod (451) is fixedly provided on the slide block (45). A rotating annular groove (3321) is provided on the side of the sliding block (332) near the traction rod (451). A connecting part (452) is fixedly provided at the end of the traction rod (451) away from the slide block (45). Multiple sets of balls are embedded in the connecting part (452). The connecting part (452) is slidably disposed in the rotating annular groove (3321). The traction rod (451) is rotatably connected to the sliding block (332) through the connecting part (452).

6. The yarn tensile property testing device according to claim 2, characterized in that: The fixing plate (32) is provided with a clamping member (36), which includes a clamping plate (361) and a clamping drive member (362). An anti-detachment plate (35) is fixedly provided at one end of the fixing plate (32) away from the bearing plate (11). The clamping plate (361) is slidably disposed on the fixing plate (32). The clamping drive member (362) is fixedly disposed on the bearing plate (11). The output end of the clamping drive member (362) is fixedly connected to the clamping plate (361). The clamping drive member (362) can drive the clamping plate (361) to abut against the anti-detachment plate (35), thereby realizing the clamping and fixing of the yarn on the fixing plate (32).

7. The yarn tensile property testing device according to claim 6, characterized in that: The tensioning plate (31) is fixedly provided with a hinge plate (311) and a dovetail block (312) at one end near the bearing plate (11). A clearance groove (3111) is provided through the hinge plate (3111). A connecting shaft (3342) is fixedly provided at one end of the first connecting rod (334) away from the tensioning rod (331). The connecting shaft (3342) is slidably disposed in the clearance groove (3111). A sliding groove (111) is provided on the bearing plate (11). The dovetail block (312) is slidably disposed in the sliding groove (111). The tensioning plate (31) is slidably connected to the bearing plate (11) through the dovetail block (312).

8. The yarn tensile property testing device according to claim 1, characterized in that: A guide plate (57) is provided at one end of the drive shaft (521) away from the drive gear (52). One end of the guide plate (57) is fixedly connected to the drive shaft (521), and the other end of the guide plate (57) is provided with a guide member (58). The guide member (58) includes a pay-off wheel (581) and a pay-off plate (582). The pay-off plate (582) is provided at one end of the guide plate (57) away from the drive shaft (521). There are two sets of pay-off wheels (581). Both sets of pay-off wheels (581) are rotatably mounted on the pay-off plate (582). The two sets of pay-off wheels (581) can clamp the yarn.

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