A flexible cable tension performance test device

Abstract

The present application belongs to the technical field of flexible cable tension detection, and particularly relates to a flexible cable tension performance test device, which comprises a control cabinet and a rack fixedly arranged on the control cabinet, a traction mechanism arranged on the rack, two rotating mechanisms arranged on the front side of the rack, an upper rotating mechanism connected with the traction mechanism, a lower rotating mechanism fixedly connected with the rack, and a clamping mechanism arranged on the rotating mechanism. The clamping mechanism comprises a U-shaped seat connected with the rotating mechanism, and a pressing driving assembly arranged on each vertical plate of the U-shaped seat. The present application uses multiple arc-shaped pressing blocks in cooperation with a bending rod to make the cable in the clamping section present a wave-shaped bending, significantly reduce the local pressure, reduce the initial damage such as indentation and micro-cracks, reduce the risk of test data distortion caused by clamping damage, make the outer insulation sleeve and the internal core maintain a highly consistent synchronous displacement during the stretching process, promote the two to tend to break at the same time, and thus accurately reflect the overall real strength of the cable.

Description

Technical Field

[0001] This invention belongs to the field of flexible cable tensile testing technology, and particularly relates to a device for testing the tensile performance of flexible cables. Background Technology

[0002] Flexible cables are composed of an outer insulation sheath and an inner conductor. When performing tensile performance tests on a traditional tensile testing machine, due to the difference in deformation characteristics between the two materials, the inner conductor often breaks before the outer insulation sheath breaks, resulting in test results that cannot accurately reflect the overall strength of the cable and affecting the accuracy of the test.

[0003] To address the issue of asynchronous fracture between the inner and outer layers, existing technologies typically incorporate toothed or knurled structures on the contact surfaces of the clamping mechanism to increase clamping friction. This allows the outer insulation sleeve and the wire core to maintain synchronous displacement during the stretching process, thereby causing them to fracture at the same time and improving the reliability of the test data.

[0004] However, while the toothed clamping structure provides high friction, it is also prone to causing indentations, microcracks, and even damage to the internal core of the cable due to localized compressive stress concentration, creating weak points. Especially under combined tensile and torsional load testing conditions, existing damage at the clamping location will accelerate its propagation, causing the cable to break prematurely at the root of the clamp instead of effectively failing within the gauge length. This distorts the test data, making it impossible to distinguish whether the fracture originates from the material's inherent properties or from additional damage introduced by the clamping. Therefore, there is an urgent need for a flexible cable tensile performance testing device that can clamp the outer insulation sleeve and core in synchronous displacement while reducing clamping damage. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a flexible cable tensile performance testing device, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: The present invention provides a flexible cable tensile performance testing device, including a control cabinet and a frame fixedly mounted on the control cabinet. A traction mechanism is mounted on the frame, and two rotating mechanisms are located on the front side of the frame. The upper rotating mechanism is connected to the traction mechanism, and the lower rotating mechanism is fixedly connected to the frame. A clamping mechanism is mounted on each rotating mechanism. The clamping mechanism includes a U-shaped seat connected to the rotating mechanism. A pressure-applying drive assembly is mounted on each of the two vertical plates of the U-shaped seat. A clamping plate is mounted on each of the pressure-applying drive assemblies. Each clamping plate has a first fixing area and a second fixing area. Geared clamping portions are respectively provided on the two first fixing areas. A second fixed area has multiple first pressure blocks evenly distributed from top to bottom, and a second pressure block is located directly below the lowest first pressure block in the same area. Both the first and second pressure blocks have arc-shaped pressure surfaces. Another second fixed area has multiple first and second bending rods, also arc-shaped, arranged alternately from top to bottom. Each first pressure block corresponds to one of the second bending rods, with the second pressure block facing the lowest first bending rod. The second pressure block also has a limiting component to restrict cable torsion. By pushing the cable closer to the first and second bending rods with the first pressure blocks, the cable undergoes continuous bending under the combined bending guidance of the multiple first pressure blocks, first bending rods, and second bending rods, remaining centered relative to the second fixed area. Ultimately, the two ends of the cable are fixed under pressure in a centered, aligned, and wavy state.

[0007] According to an advantageous embodiment, the traction mechanism includes a traction screw rotatably mounted on a frame, a traction slider threaded onto the traction screw, the traction slider being connected to an upper rotating mechanism, two symmetrical traction guide rods fixedly mounted on the frame, the traction guide rods being slidably connected to the traction slider, and a traction drive assembly also being mounted on the frame.

[0008] According to an advantageous embodiment, the traction drive assembly is configured as a drive motor, the output shaft of which is fixedly connected to the lower end of the traction screw.

[0009] According to an advantageous embodiment, the rotating mechanism includes a mounting base, on which a rotating shaft is rotatably mounted. One end of the rotating shaft is connected to a corresponding U-shaped seat. A U-shaped frame is slidably mounted on the rotating shaft. A first spring is mounted on each of the two vertical sections of the U-shaped frame. The upper and lower ends of the first spring are fixedly connected to the lower side of the horizontal section of the U-shaped frame and the upper side surface of the corresponding mounting base, respectively. A turntable is coaxially fixedly mounted on the surface of the rotating shaft. Two limiting pins are symmetrically fixedly mounted on the horizontal section of the U-shaped frame. The lower ends of the two limiting pins are inserted into the surface of the turntable and the surface of the mounting base.

[0010] According to an advantageous embodiment, a mounting seat on one rotating mechanism is fixedly connected to a traction slider, a mounting seat on another rotating mechanism is fixedly connected to the lower end of the frame, the upper end of the lower rotating shaft is fixedly connected to a corresponding U-shaped seat, and the lower end of the upper rotating shaft is fixedly connected to a corresponding U-shaped seat via a tension sensor.

[0011] According to an advantageous embodiment, the pressure driving assembly includes a pressure screw threaded onto the side wall of the vertical section of the U-shaped seat. One end of the pressure screw is rotatably connected to a connecting block, which is connected to a clamping plate. A plurality of pressure guide rods are also slidably connected to the side wall of the vertical section of the U-shaped seat. The plurality of pressure guide rods on the same side are all fixedly connected to the connecting block. A rotating handle is fixedly provided at the other end of the pressure screw.

[0012] According to an advantageous embodiment, a T-shaped guide rail plate is fixedly provided on the back of the clamping plate, the connecting block is slidably disposed on the corresponding T-shaped guide rail plate, and a locking bolt is provided on the upper side of the connecting block. Two locking holes are evenly distributed along the length direction on the upper side of the T-shaped guide rail plate, and the lower end of the locking bolt is threadedly connected to the corresponding locking hole to fix the connecting block and the clamping plate relative to each other.

[0013] According to an advantageous embodiment, the toothed clamping part includes a conical rack that is fixedly disposed in a first fixed area and is evenly distributed from top to bottom, and the conical racks in the two first fixed areas are staggered.

[0014] According to an advantageous embodiment, a groove is provided on the innermost sidewall of the clamping plate corresponding to the second pressure block. A second spring is provided in the groove. One end of the second spring is fixedly connected to the second pressure block, and the other end is fixedly connected to the inner wall of the groove. The second pressure block is slidably disposed in the groove.

[0015] According to an advantageous embodiment, the limiting component includes two lugs respectively fixedly disposed on the two side walls of the second pressure block, a vertically rotating connecting shaft is disposed between the two corresponding lugs, and one end of the connecting shaft passes through the corresponding lug and is connected to a torsion spring, the torsion spring is sleeved on one end of the connecting shaft and fixedly connected to the corresponding lug, a limiting plate is fixedly disposed on the connecting shaft, and a guide wheel is rotatably disposed at the front end of the limiting plate.

[0016] Compared with the prior art, the flexible cable tensile performance testing device provided in this embodiment of the invention has the following beneficial effects:

[0017] In this invention, addressing the two core defects of the prior art—"localized stress concentration causing core damage" and "asynchronous fracture due to differences in deformation characteristics between inner and outer layers"—this solution employs multiple arc-shaped pressure blocks in conjunction with bending rods to create a wave-like bend in the cable during clamping. On one hand, the clamping force is dispersed and transmitted to the outer insulation and inner core through multiple arc surfaces, significantly reducing localized pressure and minimizing initial damage such as indentations and microcracks, thus reducing the risk of distorted test data due to clamping damage. On the other hand, the "climbing" geometric constraint formed by this wave path generates axial resistance far exceeding that of simple friction. Furthermore, the greater the tension, the tighter the cable is pressed against the arc surface, ensuring highly consistent synchronous displacement between the outer insulation and inner core during the stretching process, leading to simultaneous fracture and thus accurately reflecting the overall true strength of the cable. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a front sectional plan view of the present invention;

[0020] Figure 3 This is an external three-dimensional structural diagram of the rotating mechanism and the clamping mechanism in this invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the clamping mechanism in this invention;

[0022] Figure 5 This is a bottom view of the clamping mechanism in this invention.

[0023] Figure 6 This is a front sectional view of the clamping mechanism in this invention.

[0024] Figure 7 This is a three-dimensional view of the external structure of the two clamping plates in this invention;

[0025] Figure 8 This is an external three-dimensional structural diagram of the second pressure block and the limiting component in this invention.

[0026] In the attached diagram, the following are the reference numerals: 1. Control cabinet; 2. Frame; 3. Traction mechanism; 31. Traction screw; 32. Traction slider; 33. Traction drive assembly; 4. Rotation mechanism; 41. Mounting base; 42. Rotating shaft; 43. U-shaped frame; 44. First spring; 45. Turntable; 46. Limit pin; 5. Clamping mechanism; 51. U-shaped seat; 52. Pressure drive assembly; 521. Pressure screw; 522. Connecting block; 53. Clamping plate; 54. Toothed clamping part; 55. First pressure block; 56. Second pressure block; 57. First bending rod; 58. Second bending rod; 59. Limiting assembly; 591. Connecting shaft; 592. Torsion spring; 593. Limiting plate; 6. T-shaped guide plate; 7. Locking bolt; 8. Second spring; 100. Cable. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This application will be described in further detail.

[0028] Please refer to the following: Figure 1 and Figure 2 A flexible cable tensile performance testing device includes a control cabinet 1 and a frame 2 fixedly mounted on the control cabinet 1. A traction mechanism 3 is mounted on the frame 2, comprising a traction screw 31 rotatably mounted on the frame 2, and a traction slider 32 threaded onto the traction screw 31. Two symmetrical traction guide rods are also fixedly mounted on the frame 2, and the traction guide rods are slidably connected to the traction slider 32. A traction drive assembly 33 is also mounted on the frame 2. The traction drive assembly 33 is a drive motor, and the output shaft of the drive motor is fixedly connected to the lower end of the traction screw 31.

[0029] The traction screw 31 is driven to rotate by the drive motor, thereby causing the traction slider 32 to move up and down.

[0030] See Figure 2 Both the traction slider 32 and the lower end of the frame 2 are fixedly equipped with a rotating mechanism 4, and the two rotating mechanisms 4 are equipped with symmetrical clamping mechanisms 5.

[0031] In actual operation, the flexible cable 100 is fixed between the upper and lower clamping mechanisms 5, and one end of the flexible cable 100 can be rotated by any of the rotating mechanisms 4 to cause the flexible cable 100 to twist. Then, by driving the traction slider 32 to move upward, one end of the flexible cable 100 is straightened and gradually stretched to the predetermined length.

[0032] See Figure 2 and Figure 3The rotating mechanism 4 includes a mounting base 41. In the two sets of rotating mechanisms 4, the mounting base 41 on one rotating mechanism 4 is fixedly connected to the traction slider 32, and the mounting base 41 on the other rotating mechanism 4 is fixedly connected to the lower end of the frame 2. A rotating shaft 42 is rotatably mounted on the mounting base 41. The upper end of the lower rotating shaft 42 is fixedly connected to the corresponding U-shaped seat 51, and the lower end of the upper rotating shaft 42 is fixedly connected to the corresponding U-shaped seat 51 through a tension sensor. A U-shaped frame 43 is slidably mounted on the rotating shaft 42. A first spring 44 is mounted on each of the two vertical sections of the U-shaped frame 43. The upper and lower ends of the first spring 44 are fixedly connected to the lower side of the horizontal section of the U-shaped frame 43 and the upper side surface of the corresponding mounting base 41, respectively. A turntable 45 is coaxially fixedly mounted on the surface of the rotating shaft 42. Two limit pins 46 are symmetrically fixedly mounted on the horizontal section of the U-shaped frame 43. The lower ends of the two limit pins 46 are inserted into the surface of the turntable 45 and the surface of the mounting base 41.

[0033] When it is necessary to test the tensile performance of the cable 100 in a torsional state, after the upper and lower ends of the cable 100 are clamped and fixed, taking the operation of the upper rotating mechanism 4 as an example, the operator can pull the U-shaped frame 43 upward to separate the two limit pins 46 on the U-shaped frame 43 from the turntable 45 on the corresponding rotating shaft 42. Then the operator can rotate the rotating shaft 42 to drive the corresponding clamping mechanism 5 to rotate, so that the cable 100 is twisted a certain number of times. Then the limit pins 46 are aligned with the insertion holes on the turntable 45 and inserted, and the turntable 45 and the rotating shaft 42 are locked again.

[0034] See Figure 1 , Figure 4 and Figure 7 The clamping mechanism 5 includes a U-shaped seat 51 connected to the rotating mechanism 4. Both vertical plates of the U-shaped seat 51 are provided with pressure driving components 52. The pressure driving components 52 are provided with clamping plates 53. Both clamping plates 53 are provided with a first fixing area and a second fixing area.

[0035] Two first fixing areas are respectively provided with toothed clamping parts 54. The flexible cable 100 can be placed between the two first fixing areas. By the two clamping plates 53 approaching each other, the two toothed clamping parts 54 bite and fix the flexible cable 100, realizing the traditional toothed clamping fixation.

[0036] In addition, the clamping plate 53 can also provide another clamping mode. A plurality of first pressure blocks 55 are fixedly arranged from top to bottom in a second fixed area, and a second pressure block 56 is fixedly arranged directly below the bottommost first pressure block 55 in the second fixed area. The pressure surfaces of the first pressure block 55 and the second pressure block 56 are both arc-shaped. A plurality of arc-shaped first bending rods 57 and a plurality of arc-shaped second bending rods 58 are arranged in another second fixed area. The plurality of first bending rods 57 and the plurality of second bending rods 58 are staggered. The plurality of first pressure blocks 55 correspond one-to-one with the plurality of second bending rods 58. The second pressure block 56 is directly opposite the bottommost first bending rod 57, and the second pressure block 56 is also provided with a limiting component 59 for limiting the twisting of the cable 100. The second bending rod 58 is connected to the corresponding clamping plate 53 through an adjustment component.

[0037] Before clamping, the two clamping plates 53 can adjust their initial positions through their respective pressure driving components 52. When clamping the cable 100, the clamping plate 53 with the first pressure block 55 and the second pressure block 56 can be controlled to actively approach the clamping plate 53 with the first bending rod 57 and the second bending rod 58.

[0038] The upper end of the cable 100 is placed in the second fixing area of ​​the upper clamping plate 53. Then, when the first pressure block 55 and the second pressure block 56 push the cable 100 close to the first bending rod 57 and the second bending rod 58, the cable 100 is continuously bent under the joint bending guidance of multiple first pressure blocks 55, multiple first bending rods 57 and multiple second bending rods 58 and remains centered relative to the second fixing area, thus initially fixing one end of the cable 100. Then, the operator pulls the cable 100 down to keep the cable 100 as taut as possible. Then, the first pressure block 55 and the second pressure block 56 are controlled to approach the cable 100 again, so that the two ends of the cable 100 are finally fixed under pressure in a centered aligned and wavy state.

[0039] The lower cable 100 can be fixed in the same way.

[0040] Staff can select the toothed clamping part 54 in the first fixed area to clamp the cable 100 for tensile performance testing as needed. At the same time, the cable 100 can be placed in the second fixed area and fixed in a wave-shaped bend by the cooperation of the first pressure block 55, the second pressure block 56, the first bending rod 57 and the second bending rod 58. The various tensile data detected can be used as a reference for evaluating the tensile performance of the cable.

[0041] See Figure 1The pressure driving assembly 52 includes a pressure screw 521 threaded onto the side wall of the vertical section of the U-shaped seat 51. One end of the pressure screw 521 is rotatably connected to a connecting block 522, which is connected to a clamping plate 53. Multiple pressure guide rods are also slidably connected to the side wall of the vertical section of the U-shaped seat 51, and all pressure guide rods on the same side are fixedly connected to the connecting block 522. The other end of the pressure screw 521 is fixedly equipped with a rotating handle. By controlling the rotation of the rotating handle, the operator can cause the pressure screw 521 to move the connecting block 522, thereby causing the connecting block 522 to move the clamping plate 53 towards another clamping plate 53 to apply pressure.

[0042] See Figure 4 To ensure more concentrated pressure from the pressure-applying drive assembly 52, a T-shaped guide rail plate 6 is fixedly mounted on the back of the clamping plate 53. The connecting block 522 is slidably mounted on the corresponding T-shaped guide rail plate 6, and a locking bolt 7 is provided on the upper side of the connecting block 522. Two locking holes are evenly distributed along the length of the T-shaped guide rail plate 6 on its upper side. The lower end of the locking bolt 7 is threaded into the corresponding locking hole, fixing the connecting block 522 relative to the clamping plate 53. The clamping plate 53 can slide along the connecting block 522 via the T-shaped guide rail plate 6, so that the connecting block 522 faces the first or second fixing area on the clamping plate 53, and is then fixed by the locking bolt 7. This ensures that when the pressure-applying screw 521 and the connecting block 522 transmit pressure to the clamping plate 53, they can more concentratedly act on the cable 100 located in the first or second fixing area.

[0043] See Figure 7 The toothed clamping part 54 includes tapered racks fixedly disposed in the first fixing area and evenly distributed from top to bottom, and the tapered racks in the two first fixing areas are staggered. When the two clamping plates 53 are close together, the end of the cable 100 can be engaged by the tapered racks on the clamping plates 53, thereby firmly locking the end of the cable 100.

[0044] See Figures 5-7 In order to further prevent the end of the cable 100 from being excessively deformed when the cable 100 is twisted, a groove is provided on the innermost side wall of the clamping plate 53 corresponding to the second pressure block 56. A second spring 8 is provided in the groove, one end of the second spring 8 is fixedly connected to the second pressure block 56, and the second pressure block 56 is slidably disposed in the groove.

[0045] See Figure 7 and Figure 8The limiting component 59 includes two ear seats that are fixedly mounted on the two side walls of the second pressure block 56 respectively. A vertically rotating connecting shaft 591 is provided between the two corresponding ear seats. One end of the connecting shaft 591 passes through the corresponding ear seat and is connected to a torsion spring 592. The torsion spring 592 is sleeved on one end of the connecting shaft 591 and fixedly connected to the corresponding ear seat. A limiting plate 593 is fixedly mounted on the connecting shaft 591. A guide wheel is rotatably mounted at the front end of the limiting plate 593.

[0046] When the second pressure block 56 moves toward the lowermost first bending rod 57, it simultaneously drives the limiting plate 593 to move toward the first bending rod 57. The second pressure block 56 comes into contact with the surface of the cable 100, and the second pressure block 56 compresses the second spring 8 to contract. After the second spring 8 contracts to a certain extent, the second pressure block 56 pushes the cable 100 toward the first bending rod 57. The guide wheel on the limiting plate 593 first contacts the inner arc surface of the first bending rod 57. Under the guidance of the inner arc surface, the two limiting plates 593 rotate inward synchronously and come into contact with the surface of the cable 100, forming a lateral limit on the cable 100. At the same time, the second pressure block 56 comes into contact with the surface of the cable 100.

[0047] The specific working method of this plan is as follows:

[0048] When using a traditional serrated clamping method, adjust the sliding of the clamping plate 53 relative to the connecting block 522 so that the first fixing area on the clamping plate 53 is aligned with the corresponding connecting block 522, and then fix the clamping plate 53 relative to the connecting block 522. Then, place the end of the cable 100 into the first fixing area of ​​the clamping plate 53, and control the corresponding clamping plate 53 to drive the serrated clamping part to contact the end of the cable 100.

[0049] When clamping is performed using the first pressure block 55, the second pressure block 56 in conjunction with the first bending rod 57 and the second bending rod 58, the clamping plate 53 is adjusted to slide relative to the connecting block 522 so that the second fixing area on the clamping plate 53 is aligned with the corresponding connecting block 522, and then the clamping plate 53 is fixed relative to the connecting block 522. Then, the cable 100 end is placed in the second fixing area, and the corresponding clamping plate 53 is controlled to move the first pressure block 55 and the second pressure block 56 toward the first bending rod 57 and the second bending rod 58 for initial fixing. The initially fixed cable 100 end is then pulled to bring it to a taut state, and then further fixed in this state.

[0050] In summary, the cable 100 is wavy-shaped, bending between multiple arc grooves formed by the first bending rod 57 and the second bending rod 58. The clamping force is distributed to the outer insulation sheath and the inner core of the cable 100 through multiple arc surfaces. Compared to the "point contact" of toothed clamps, this design significantly reduces local pressure and the risk of clamping end breakage due to stress concentration, thus obtaining more realistic and effective test data. Furthermore, both clamping modes can be used alternately for testing, providing more reference data for evaluating the tensile performance of the cable 100.

[0051] The insulation jacket and internal core of cable 100 need to "climb" a slope in the wave path to slip off. The axial resistance caused by this geometric constraint is greater than that of simple friction. Under tension or torsion, the greater the tensile force, the tighter cable 100 is pressed against the curved surface, and the stronger the self-locking effect. Furthermore, compared to the stress damage problem exacerbated by traditional straight clamping in torsion testing, the wave path allows cable 100 to be pre-bent in the clamping section. When torsion is applied at the distal end, this bend can absorb some of the torsional deformation through slight deformation, avoiding torque concentration at the clamping starting point and reducing the risk of stress concentration damage to cable 100.

[0052] In addition, the cable 100 end can achieve a standardized "insert and clamp" operation, quickly ensuring that the upper and lower ends of the cable 100 are on the same vertical line. This can greatly improve testing efficiency and ensure that the clamping state is consistent in each test, thereby obtaining data with better repeatability.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flexible cable tensile performance testing device, comprising a control cabinet and a frame fixedly mounted on the control cabinet, wherein a traction mechanism is provided on the frame, characterized in that: Two rotating mechanisms are provided on the front side of the frame. The upper rotating mechanism is connected to the traction mechanism, and the lower rotating mechanism is fixedly connected to the frame. A clamping mechanism is provided on the rotating mechanism. The clamping mechanism includes a U-shaped seat connected to the rotating mechanism. Both vertical plates of the U-shaped seat are provided with pressure driving components. The pressure driving components are provided with clamping plates. Both clamping plates are provided with a first fixing area and a second fixing area. Each of the two first fixed areas is provided with a toothed clamping part; A second fixed area is provided with a plurality of first pressure blocks evenly distributed from top to bottom, and a second pressure block is provided directly below the bottommost first pressure block in the second fixed area. The pressure surfaces of the first and second pressure blocks are both arc-shaped. A second fixed area is provided with a plurality of first bending rods and a plurality of second bending rods, all of which are arc-shaped. The plurality of first bending rods and the plurality of second bending rods are staggered from top to bottom. The plurality of first pressure blocks correspond one-to-one with the plurality of second bending rods. The second pressure blocks are directly opposite the bottommost first bending rod, and the second pressure blocks are also provided with a limiting component for limiting cable torsion. The cable is pushed close to the first bending rod and the second bending rod by the first pressure block, so that the cable is continuously bent under the common bending guidance of multiple first pressure blocks, multiple first bending rods and multiple second bending rods and remains centered relative to the second fixed area, so that the two ends of the cable are pressed and fixed in a centered aligned and wavy state.

2. The flexible cable tensile performance testing device according to claim 1, characterized in that, The traction mechanism includes a traction screw rotatably mounted on the frame, a traction slider threaded onto the traction screw, the traction slider being connected to the upper rotating mechanism, two symmetrical traction guide rods fixedly mounted on the frame, the traction guide rods being slidably connected to the traction slider, and a traction drive assembly also mounted on the frame.

3. The flexible cable tensile performance testing device according to claim 2, characterized in that, The traction drive assembly is configured as a drive motor, and the output shaft of the drive motor is fixedly connected to the lower end of the traction screw.

4. The flexible cable tensile performance testing device according to claim 2, characterized in that, The rotating mechanism includes a mounting base, on which a rotating shaft is rotatably mounted. One end of the rotating shaft is connected to a corresponding U-shaped seat. A U-shaped frame is slidably mounted on the rotating shaft. A first spring is mounted on each of the two vertical sections of the U-shaped frame. The upper and lower ends of the first spring are fixedly connected to the lower side of the horizontal section of the U-shaped frame and the upper side of the corresponding mounting base, respectively. A turntable is coaxially fixedly mounted on the surface of the rotating shaft. Two limit pins are symmetrically fixedly mounted on the horizontal section of the U-shaped frame. The lower ends of the two limit pins are inserted into the surface of the turntable and the surface of the mounting base.

5. The flexible cable tensile performance testing device according to claim 4, characterized in that, The mounting base on one rotating mechanism is fixedly connected to the traction slider, the mounting base on the other rotating mechanism is fixedly connected to the lower end of the frame, the upper end of the lower rotating shaft is fixedly connected to the corresponding U-shaped seat, and the lower end of the upper rotating shaft is fixedly connected to the corresponding U-shaped seat through a tension sensor.

6. The flexible cable tensile performance testing device according to claim 1, characterized in that, The pressure driving assembly includes a pressure screw threaded onto the side wall of the vertical section of the U-shaped seat. One end of the pressure screw is rotatably connected to a connecting block, which is connected to a clamping plate. Multiple pressure guide rods are also slidably connected to the side wall of the vertical section of the U-shaped seat. All multiple pressure guide rods on the same side are fixedly connected to the connecting block. A rotating handle is fixedly provided at the other end of the pressure screw.

7. The flexible cable tensile performance testing device according to claim 6, characterized in that, A T-shaped guide rail plate is fixedly installed on the back of the clamping plate. The connecting block is slidably installed on the corresponding T-shaped guide rail plate, and a locking bolt is provided on the upper side of the connecting block. Two locking holes are evenly distributed along the length direction on the upper side of the T-shaped guide rail plate. The lower end of the locking bolt is threaded to the corresponding locking hole to fix the connecting block and the clamping plate relative to each other.

8. The flexible cable tensile performance testing device according to claim 1, characterized in that, The toothed clamping part includes a conical rack that is fixedly disposed in the first fixed area and evenly distributed from top to bottom, and the conical racks in the two first fixed areas are staggered.

9. The flexible cable tensile performance testing device according to claim 1, characterized in that, A groove is provided on the innermost sidewall of the clamping plate corresponding to the second pressure block. A second spring is provided in the groove. One end of the second spring is fixedly connected to the second pressure block, and the other end is fixedly connected to the inner wall of the groove. The second pressure block is slidably disposed in the groove.

10. The flexible cable tensile performance testing device according to claim 1, characterized in that, The limiting component includes two ear seats that are fixedly mounted on the two side walls of the second pressure block. A vertically rotating connecting shaft is provided between the two corresponding ear seats. One end of the connecting shaft passes through the corresponding ear seat and is connected to a torsion spring. The torsion spring is sleeved on one end of the connecting shaft and fixedly connected to the corresponding ear seat. A limiting plate is fixedly mounted on the connecting shaft, and a guide wheel is rotatably mounted on the front end of the limiting plate.

Images