Cable mechanical property testing device and testing method

Abstract

The invention discloses a cable mechanical property testing device and method, and relates to the technical field of cable detection.The cable mechanical property testing device comprises a clamping mechanism, a tension applying mechanism, a torsion applying mechanism and a bending mechanism, the pulling force applying mechanism comprises two force applying moving frames and a pulling force driving assembly; the torsion applying mechanism comprises two torsion driving assemblies installed on the two swing seats correspondingly, and the two torsion driving assemblies are used for driving the two clamps to rotate correspondingly. The bending mechanism comprises a bending abutting assembly located between the two clamps and a bending driving assembly in transmission connection with the bending abutting assembly. The tensile property test, the distortion resistance test and the bending resistance test can be continuously completed through one-time clamping of the cable, different actual installation and use scenes of the cable can be simulated, and the accuracy of tensile property, distortion resistance and bending resistance test results of the cable is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and particularly relates to a cable mechanical property testing device and a testing method. Background Art

[0002] A cable is a conductor combination used for power transmission and electrical signal transmission, and is widely used in power systems, buildings, transportation, communications, and various industrial and civil fields; before a cable is put into use after production, various mechanical properties need to be detected to show that the produced cable meets the quality standards.

[0003] Among them, the cable mechanical property testing includes tensile resistance performance testing, torsional resistance performance testing, and bending resistance performance testing. The current testing equipment can only perform one or two of these tests separately, and cannot meet the requirement of performing three tests simultaneously. It is necessary to re-clamp the cable, which reduces the cable production efficiency and damages the cable during multiple clamping processes, affecting the accuracy of the test. In addition, currently, the cable is stretched and twisted by linear stretching and linear twisting methods, and cannot simulate the tensile resistance performance and torsional resistance performance of the cable under different bending degrees during actual installation and use; and currently, only one direction of the outer circumference of the cable can be bent separately, and the mechanical properties of the cable when bent in different directions during actual installation and use cannot be simulated, thereby affecting the accuracy of the test results of the cable's tensile resistance, torsional resistance, and bending resistance. Summary of the Invention The purpose of the present invention is to provide a cable mechanical property testing device and a testing method to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or creation condition.

[0004] The technical solutions adopted to solve the above technical problems are as follows: The present invention provides a cable mechanical property testing device, including: A clamping mechanism, including two clamps, and the two clamps are used for clamping both ends of the cable; A tensile force applying mechanism, including two force-applying moving frames and a tensile force driving component. Both of the two force-applying moving frames are provided with swing seats, and the two clamps are respectively arranged on the two swing seats. The swing seats are swingably arranged relative to the force-applying moving frames around a swing axis extending along a second direction, so that the two clamps respectively follow the axial directions of both ends of the cable around the swing axis, and the clamps are rotatably arranged relative to the swing seats around the axis of the cable. The tensile force driving component is used to drive the two force-applying moving frames to approach and move away from each other along a first direction, so as to adjust the distance between the two clamps and apply an axial tensile force to the cable; The torque applying mechanism comprises two torque driving assemblies respectively mounted on the two swing seats, the two torque driving assemblies respectively driving the two clamps to rotate, so as to drive the cable to rotate around its own axis and apply torque to the cable; The bending mechanism comprises a bending resistance component located between the two clamps, and a bending drive component drivingly connected to the bending resistance component, wherein the bending resistance component is used for slidingly abutting against the outer peripheral wall of the cable, and the bending drive component is used for driving the bending resistance component to move along a third direction to promote the bending of the cable, and the bending resistance component comprises a plurality of resistance members slidingly abutting against the outer peripheral wall of the cable, and the plurality of resistance members are arranged in an annular manner to form a channel for the cable to pass through, and the axial direction of the channel extends along the first direction, and the bending resistance component also comprises a plurality of resistance drive members drivingly connected to the plurality of resistance members one by one, and the plurality of resistance drive members are respectively used for driving the plurality of resistance members to move along the radial direction of the channel to change the caliber size of the channel and the center position of the channel; Wherein, the first direction, the second direction and the third direction are arranged perpendicular to each other.

[0005] The cable mechanical properties testing device of the present invention has the following beneficial effects: In use, it is clamped to both ends of the cable by two clamps, and the bending contact assembly is controlled to slide and abut against the outer peripheral wall of the cable. When performing the anti-bending performance test, the bending driving assembly drives the bending contact assembly to move along the third direction to push the cable to bend, so that the included angle between the cables on both sides of the bending contact assembly reaches the set bending degree. At this time, the two clamps are driven by the tension driving assembly to move following the distance between the two ends of the cable, and at the same time, the two clamps respectively rotate axially following the two ends of the cable, so that the whole cable maintains the set bending degree for the set time. When performing the anti-tensile performance test and the anti-twist performance test, the cable is bent to the set bending degree to simulate different bending degrees of the cable during actual installation and use. The tension driving assembly drives the two force-applying moving frames to move away from each other along the first direction to apply an axial tensile force to the cable to complete the anti-tensile performance test at a specific bending degree. The two torque driving assemblies drive the two clamps to rotate in opposite directions respectively to apply torque to the cable to complete the anti-twist performance test at a specific bending degree. In addition, between two adjacent anti-bending performance tests, between two adjacent anti-tensile performance tests, and between two adjacent anti-twist performance tests, the two torque driving assemblies drive the two clamps to rotate in the same direction according to the preset rotation angle interval to control the cable to rotate around its own axis, so that different positions on the outer periphery of the cable move towards the moving direction of the bending contact assembly, to simulate the cable bending in different directions during actual installation and use. The present invention can continuously complete the anti-tensile performance test, the anti-twist performance test, and the anti-bending performance test by clamping the cable once, and can simulate different actual installation and use scenarios of the cable, improving the accuracy of the test results of the anti-tensile, anti-twist, and anti-bending properties of the cable.

[0006] In addition, the present invention uses multiple contact members to slide and abut against the outer peripheral wall of the cable to achieve better limiting abutment of the cable, so that the cable is bent on the set vertical plane, avoiding cable deviation and affecting the test accuracy, and also meeting cables of different sizes, as well as adjusting the distance in the front-rear direction between the cable bending position and the two ends of the cable.

[0007] As a further improvement of the above technical solution, the bending mechanism further includes a rotation driving assembly. The rotation driving assembly includes a rotation ring with an axis extending along the first direction and a rotation driving structure drivingly connected to the rotation ring in a transmission manner. A plurality of the contact members are arranged on the rotation ring at annular intervals with the axis of the rotation ring as the center. The rotation driving structure is used to drive the rotation ring to rotate around its own axis, and synchronously drive the plurality of contact driving members to drive the contact members to move radially, so that the central position of the channel is eccentric to the rotation center of the rotation ring to drive the cable to shake.

[0008] As a further improvement of the above technical solution, the contact member is a universal wheel, and the outer peripheral wheel wall of the universal wheel abuts against the outer peripheral wall of the cable.

[0009] As a further improvement of the above technical solution, the bending mechanism also includes a transverse driving assembly, which is used to drive the bending resistance assembly to move along the first direction so that the bending resistance assembly abuts against the cable at different positions in the axial direction.

[0010] As a further improvement of the above technical solution, the clamp includes a clamp seat, the clamp seat is provided with a conical clamp hole extending along the first direction, the two ends of the conical clamp hole are divided into a large end and a small end, the small ends on the two clamps are arranged opposite to each other, the conical clamp hole is provided with at least two clamps, and at least two of the clamps are arranged at intervals along the circumference of the conical clamp hole to form a conical tube combination structure that clamps the cable.

[0011] As a further improvement of the above technical solution, the large-mouthed end is sleeved with a locking sleeve that is adjustable in the axial direction, and a compression elastic member is provided between the locking sleeve and the tapered tube structure, and the compression elastic member pushes at least two of the clips in the axial direction from the large-mouthed end to the small-mouthed end, so that the tapered tube combined structure contracts to clamp the cable; The inner peripheral wall of the tapered clamping hole is provided with at least two position-limiting sliding parts extending in the axial direction, and the at least two clamping pieces are respectively slidably matched with the at least two position-limiting sliding parts in the axial direction.

[0012] The present invention also provides a cable mechanical properties testing method, which is applicable to the cable mechanical properties testing device. The cable mechanical properties testing method includes: Passing the cable to be tested through the bending resistance component; Clamping the two ends of the cable to be tested to the two clamps respectively; Controlling the bending abutment component to abut against the outer peripheral wall of the cable; Controlling the bending resistance component to move to a first preset position along a third direction according to a first preset bending degree, and controlling the distance between the two clamps to a first preset value, so that the cable is tightened and maintained for a first preset time period, so as to complete a bending resistance test; Controlling the bending resistance component to move to a second preset position along a third direction according to a second preset curvature, and controlling the distance between the two clamps to a second preset value, applying a preset tensile force to the cable and maintaining it for a second preset time period, so as to complete a tensile resistance test; Control the bending resistance component to move to a third preset position along a third direction according to a third preset curvature, control the distance between the two clamps to a third preset value, control the two clamps to rotate in opposite directions, apply a preset torque to the cable and maintain it for a third preset time period, so as to complete an anti-twisting performance test; Control the execution of the anti-bending performance test, the anti-tensile performance test, and the anti-twisting performance test continuously for multiple times respectively. Between adjacent anti-bending performance tests, between adjacent anti-tensile performance tests, and between adjacent anti-twisting performance tests, control the cable to rotate around its own axis according to a preset rotation angle spacing, so that different positions on the outer circumference of the cable face the direction in which the bending contact component moves.

[0013] As a further improvement of the above technical solution, the cable mechanical property test method further includes: During each anti-tensile performance test, the anti-tensile performance test, and the anti-twisting performance test, control the central position of the channel to be eccentrically arranged with respect to the axis of the rotating ring according to a preset eccentric distance, and then control the rotating ring to rotate around its own axis according to a preset rotation speed; Between adjacent anti-bending performance tests, between adjacent anti-tensile performance tests, and between adjacent anti-twisting performance tests, control the bending contact component to move along the first direction to a preset moving position, so that the bending contact component abuts against different positions on the axial direction of the cable.

[0014] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the present invention in conjunction with the drawings and embodiments; Figure 1 is a schematic structural diagram of an embodiment of the cable mechanical property test device provided by the present invention; Figure 2 is a schematic diagram of an embodiment of the cable mechanical property test device provided by the present invention for performing an anti-bending performance test on a cable; Figure 3 is a schematic diagram of an embodiment of the cable mechanical property test device provided by the present invention for performing an anti-tensile performance test on a cable; Figure 4 is a schematic diagram of an embodiment of the cable mechanical property test device provided by the present invention for performing an anti-twisting performance test on a cable; Figure 5 is Figure 1 a partial enlarged view of part A in Figure 6 is Figure 1 a partial enlarged view of part B in Figure 7 is an axial schematic diagram when the channel of an embodiment of the bending contact component provided by the present invention is eccentric with the rotating ring; Figure 8 is a sectional view of a fixture provided by the present invention, showing one embodiment thereof; Figure 9 is a flowchart of a method for testing the mechanical properties of a cable provided by the present invention, showing one embodiment thereof; Figure 10 is a control flowchart for simulating the scenario where a cable sways under external influence; Figure 11 is a control flowchart for simulating the scenario where a cable bends at different axial positions; Reference numerals in the attached drawings: Fixture 100; Clamping seat 110; Tapered clamping hole 111; Large-mouth end 112; Small-mouth end 113; Limit sliding part 114; Clamping piece 120; Sliding boss 121; Locking sleeve 130; Compressing elastic member 140; Tensile force applying mechanism 200; Force-applying moving frame 210; Swing seat 211; Tensile force driving assembly 220; Tensile force driving motor 221; Bi-directional lead screw 222; Base 230; First chute 231; Torque driving assembly 300; Rotating disk 310; First gear ring 320; First driving gear 330; Torque driving motor 340; Bending mechanism 400; Bending contact assembly 410; Contact member 411; Channel 412; Contact driving member 413; Bending driving assembly 420; Lifting seat 421; Lifting driving structure 422; Lifting motor 4221; Lifting lead screw 4222; Frame 4223; Rotating driving assembly 430; Rotating ring 431; Rotating driving structure 432; Second gear ring 4321; Second driving gear 4322; Rotating driving motor 4323; Transverse movement driving assembly 440; Transverse movement motor 441; Transverse movement lead screw 442; Cable 500. Detailed implementation manners

[0016] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as a limitation to the present invention.

[0017] In the description of the present invention, it should be understood that for the orientation descriptions, such as up, down, etc., the orientation or positional relationships indicated are based on the orientation or positional relationships shown in the accompanying drawings. They are only for facilitating the description of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0018] In the description of the present invention, "a plurality of" refers to more than two. If the first and second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0019] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0020] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the following described embodiments are part of the embodiments of the present invention, not all embodiments.

[0021] The mechanical property tests of the cable mainly include tensile property test, torsion property test and bending property test. However, the current test equipment can only perform one or two of these tests separately, and cannot meet the requirement of performing three tests simultaneously. The cable 500 needs to be re-clamped, and in addition, different scenarios during the actual installation and use of the cable 500 cannot be simulated, which affects the accuracy of the test results of the tensile, torsion and bending properties of the cable 500.

[0022] The present invention provides a cable mechanical property test device, which can continuously complete the tensile property test, torsion property test and bending property test of the cable 500 through one-time clamping of the cable 500, and can simulate different actual installation and use scenarios of the cable 500, improving the accuracy and efficiency of the test results of the tensile, torsion and bending properties of the cable 500.

[0023] As Figure 1 shown, the cable mechanical property test device of the embodiment of the present invention includes: a clamping mechanism, a tensile force applying mechanism 200, a torsion applying mechanism and a bending mechanism 400.

[0024] Among them, the clamping mechanism of this embodiment includes two clamps 100, and the two clamps 100 are used to clamp both ends of the cable 500.

[0025] The tensile force applying mechanism 200 includes two force-applying moving frames 210 and a tensile force driving component 220. The two force-applying moving frames 210 are arranged at intervals along the first direction. In this embodiment, the first direction is defined as the left-right direction. In some other embodiments, the first direction can be the front-back direction or the up-down direction, etc. As Figure 1 shown, the two force-applying moving frames 210 of this embodiment are arranged left and right.

[0026] The two force-applying movable frames 210 are both provided with a swing seat 211, and the two clamps 100 are respectively arranged on the two swing seats 211, wherein the swing seat 211 is freely swingable relative to the force-applying movable frame 210 around a swing axis extending along the second direction, so that the two clamps 100 can respectively follow the axial swing of the two ends of the cable 500, wherein the second direction of this embodiment is arranged perpendicular to the first direction, and this embodiment defines the second direction as the front-to-back direction. It can be understood that when the two ends of the cable 500 are axially tilted, the clamp 100 also tilts along with the end of the cable 500.

[0027] The tension driving assembly 220 of this embodiment is used to drive the two force-applying movable frames 210 to move closer to and away from each other along a first direction to adjust the distance between the two clamps 100 and apply an axial tensile force to the cable 500. It can be understood that when the two ends of the cable 500 are tilted, the tension driving assembly 220 applies an axial component of force to the cable 500, and when the cable 500 extends along the first direction, the tension driving assembly 220 applies a tensile force to the cable 500 along the first direction.

[0028] The torque applying mechanism of this embodiment includes two torque driving components 300 respectively installed on two swing seats 211. The clamp 100 of this embodiment is arranged to rotate around the axis of the cable 500 relative to the swing seat 211. The two torque driving components 300 are respectively used to drive the two clamps 100 to rotate relative to the two swing seats 211, so as to drive the cable 500 to rotate around its own axis and apply torque to the cable 500. Since this embodiment needs to limit the clamp 100 to be able to follow the axial swing of the two ends of the cable 500, and in order to ensure that the torque applied to the cable 500 is around the axis of the cable 500 itself, and to facilitate the debugging of the equipment, during the design, it is only necessary to ensure that the rotation axis of the clamp 100 driven by the torque driving component 300 is concentric with the axis of the clamp 100 itself.

[0029] The bending mechanism 400 of this embodiment includes a bending resistance component 410 located between the two clamps 100 and a bending drive component 420 that is transmission-connected to the bending resistance component 410, wherein the bending resistance component 410 is used to slide and abut against the outer peripheral wall of the cable 500, and the bending drive component 420 is used to drive the bending resistance component 410 to move along a third direction to push the cable 500 to bend. This embodiment defines the third direction as the up and down direction. When the bending resistance component 410 pushes the cable 500 to bend in the up and down directions, it can drive the two clamps 100 to swing at the same time. In this way, there is no bending deformation between the cable 500 and the clamp 100, and secondly, it also ensures that the axes at both ends of the cable 500 are concentric with the rotation axis of the clamp 100.

[0030] like Figure 1As shown, before the test, both ends of the cable 500 are clamped by two fixtures 100, and the bending contact assembly 410 is controlled to slide and abut against the outer peripheral wall of the cable 500.

[0031] As Figure 2 shown, when performing the anti-bending performance test, the bending contact assembly 410 is driven by the bending drive assembly 420 to move upward along, so as to push the cable 500 to bend, and the included angle between the cables 500 on both sides of the bending contact assembly 410 is made to reach the set bending degree. At this time, the two fixtures 100 are driven by the tension drive assembly 220 to move following the change in the distance between the two ends of the cable 500. At the same time, the two fixtures 100 respectively follow the axial swing of the two ends of the cable 500, so that the entire cable 500 maintains the set time at the set bending degree.

[0032] As Figure 3 and Figure 4 shown, before performing the anti-tensile performance test and the anti-twisting performance test, the cable 500 is bent to a specific bending degree to simulate different bending degrees of the cable 500 during actual installation and use.

[0033] As Figure 3 shown, when performing the anti-tensile performance test, the tension drive assembly 220 drives the two force-applying moving frames 210 to move away from each other in the left-right direction, applying an axial tensile force to the cable 500 to complete the anti-tensile performance test at a specific bending degree.

[0034] As Figure 4 shown, when performing the anti-twisting performance test, the two torque drive assemblies 300 respectively drive the two fixtures 100 to rotate in opposite directions, applying a torque to the cable 500 to complete the anti-twisting performance test at a specific bending degree.

[0035] The present invention takes into account that the cable 500 will bend in different directions during actual installation and use. Therefore, when performing the anti-tensile, anti-twisting and anti-bending tests, for the situation where the cable 500 bends in different directions, multiple anti-tensile, anti-twisting and anti-bending tests need to be carried out. And in each test, the cable 500 needs to bend in different directions. Specifically: between adjacent two anti-bending performance tests, between adjacent two anti-tensile performance tests, between adjacent two anti-twisting performance tests, according to the preset rotation angle interval, the two torque drive assemblies 300 respectively drive the two fixtures 100 to rotate in the same direction to control the cable 500 to rotate around its own axis, so that different positions on the outer periphery of the cable 500 face the direction in which the bending contact assembly 410 pushes the cable 500 to bend. In this way, the bending contact assembly 410 abuts against different positions on the outer periphery of the cable 500. At this time, the bending contact assembly 410 only needs to move in one direction, which can simulate the scenario where the cable 500 bends in different directions during actual installation and use.

[0036] As Figure 1 shown, for the specific structure of the tensile force applying mechanism 200 of this embodiment, the tensile force applying mechanism 200 of this embodiment further includes a base 230. A first sliding groove 231 extending in the left - right direction is provided at the top of the base 230. The lower parts of the two force - applying moving frames 210 are slidably connected to the first sliding groove 231. The tensile force driving assembly 220 includes a tensile force driving motor 221 and a bidirectional lead screw 222 that are in transmission connection with each other. The bidirectional lead screw 222 is in threaded transmission connection with the two force - applying moving frames 210 respectively. By driving the bidirectional lead screw 222 to rotate through the tensile force driving motor 221, the two force - applying moving frames 210 are driven to approach and move away from each other.

[0037] In some other embodiments, one of the two force - applying moving frames 210 is fixed and the other is movable. The tensile force driving assembly 220 drives one of the force - applying moving frames 210 to move; or the tensile force driving assembly 220 uses two tensile force driving members to drive the two force - applying moving frames 210 to move separately.

[0038] The swing seat 211 is installed on the upper part of the force - applying moving frame 210 through a swing shaft rod extending in the front - rear direction.

[0039] As Figure 5 shown, for the specific structure of the torque driving assembly 300 of this embodiment, the torque driving assembly 300 of this embodiment includes a rotating disk 310 rotatably installed on the swing seat 211, a first gear ring 320 fixedly sleeved on the rotating disk 310, a first driving gear 330 meshing with the first gear ring 320, and a torque driving motor 340 in transmission connection with the first driving gear 330. The clamp 100 is coaxially installed on the rotating disk 310. By driving the first driving gear 330 to rotate through the torque driving motor 340, the rotating disk 310 is driven to rotate, and the clamp 100 is synchronously driven to rotate around its own axis.

[0040] For force balance, the rotation axis of the rotating disk 310 of this embodiment is arranged to intersect with the swing axis of the swing seat 211. When stretching the cable 500, the swing seat 211 will not shake.

[0041] As Figure 6 and Figure 7As shown, with regard to the structure of the bending resistance component 410, the bending resistance component 410 of this embodiment includes a plurality of resistance members 411 that are slidably abutted against the outer peripheral wall of the cable 500, and the plurality of resistance members 411 are arranged in a ring-shaped interval to form a channel 412 for the cable 500 to pass through, and the axial direction of the channel 412 extends along the left-right direction. In this embodiment, a plurality of resistance members 411 are slidably abutted against the outer peripheral wall of the cable 500 to achieve better limiting abutment of the cable 500, so that the cable 500 remains bent on a set vertical plane, thereby preventing the cable 500 from deviating and affecting the accuracy of the test.

[0042] In order to meet the needs of cables 500 of different sizes and to adjust the distance between the bending position of the cable 500 and the two ends of the cable 500 in the front-to-back direction, the bending resistance assembly 410 also includes a plurality of resistance driving members 413 which are connected to the plurality of resistance members 411 in a one-to-one transmission manner. The plurality of resistance driving members 413 are respectively used to drive the plurality of resistance members 411 to move radially along the channel 412 to change the caliber size and the center position of the channel 412. If the outer diameter of the cable 500 increases, the caliber of the channel 412 surrounded by the plurality of resistance members 411 is expanded; if the outer diameter of the cable 500 decreases, the caliber of the channel 412 is reduced; at the same time, according to the requirements of the test simulation scenario, the positions of the plurality of resistance members 411 are adjusted by controlling the driving stroke of the plurality of resistance driving members 413 to change the center position of the channel 412. If the test is performed in a static state, the displacement of the center position of the channel 412 in the front-to-back direction is adjusted. In the initial state, the center position of the channel 412 is located on the same vertical plane as the axes of the two clamps 100.

[0043] In addition, the present invention also takes into account the need to simulate the mechanical properties of the cable 500 when the cable 500 is shaken by external influences, such as Figure 1 and Figure 6As shown, the bending mechanism 400 of this embodiment further includes a rotation driving assembly 430. The rotation driving assembly 430 includes a rotating ring 431 whose axis extends along a first direction, and a rotation driving structure 432 for driving the rotating ring 431 to rotate around its own axis. A plurality of abutting members 411 are arranged at intervals in a ring shape with respect to the axis of the rotating ring 431. When it is necessary to test the cable 500 in a shaking state, the bending degree, tensile force or torsion of the cable 500 is adjusted to a set value to change the central position of the channel 412, so that the central position of the channel 412 is eccentrically arranged with respect to the central position of the rotating ring 431 at a set distance. It can be understood that the axis of the cable 500 is eccentrically arranged with respect to the central position of the rotating ring 431, and then the rotating ring 431 is driven by the rotation driving structure 432 to rotate at a set speed to drive the bent part of the cable 500 to shake. At the same time, the rotation driving structure 432 can also be controlled to drive the rotating ring 431 to rotate reciprocally at a set amplitude and frequency to simulate the swinging of the cable 500 and perform a dynamic test on the cable 500.

[0044] As Figure 1 shown, in the specific structures of the rotation driving structure 432 and the bending driving assembly 420 in some embodiments, the bending driving assembly 420 includes a lifting seat 421 and a lifting driving structure 422 for driving the lifting seat 421 to move in the up and down direction. The lifting driving structure 422 of this embodiment adopts a motor and lead screw method. Specifically, the lifting driving structure 422 includes a lifting motor 4221, a lifting lead screw 4222, and a frame 4223. The lifting lead screw 4222 is vertically rotatably installed on the frame 4223. The lifting motor 4221 is in transmission connection with the lifting lead screw 4222, and the lifting lead screw 4222 is in threaded transmission connection with the lifting seat 421. In some other embodiments, the bending driving assembly 420 can adopt other linear driving structures.

[0045] As Figure 6 shown, the rotation driving structure 432 includes a second gear ring 4321 coaxially fixed to the rotating ring 431, a second driving gear 4322 meshing with the second gear ring 4321, and a rotation driving motor 4323 in transmission connection with the second driving gear 4322. In this embodiment, the rotating ring 431 is rotatably installed on the side surface of the lifting seat 421. The lifting seat 421 of this embodiment is a sleeve structure, and a rotation chute is provided on the side surface of the lifting seat 421. The rotating ring 431 is slidably matched with the rotation chute through a slider. In some other embodiments, the rotation driving structure 432 can adopt other driving structures.

[0046] And a plurality of abutting driving members 413 are radially installed in a ring shape on the rotating ring 431. The telescopic driving end of the abutting driving member 413 is connected to the abutting member 411. The abutting driving member 413 can adopt structures such as electric poles, cylinders, and hydraulic cylinders.

[0047] In order to reduce damage to the surface of the cable 500, the abutment member 411 of this embodiment is a universal wheel, the outer peripheral wheel wall of the universal wheel abuts against the outer peripheral wall of the cable 500, when the cable 500 moves relatively along the axial direction of the channel 412, such as Figure 6 As shown, at this time, the universal wheel rotates to a state where its axis is perpendicular to the axis of the channel 412, and the cable 500 is guided by rolling, so that the tensile strength test and the bending strength test can be adapted. If the cable 500 rotates relative to the channel 412, as shown in FIG. Figure 7 As shown, the universal wheel is now rotated to a state parallel to the axis of the channel 412, so that the universal wheel can roll along the circumference of the cable 500, which is suitable for anti-twisting performance testing, and is also suitable for various tests of the cable 500 under dynamic conditions.

[0048] In some other embodiments, the resistance member 411 may be in the form of a ball, or directly in the form of a slider structure.

[0049] Since the cable 500 may bend and deform at different axial positions during actual use, in order to simulate the bending scenarios of the cable 500 at different axial positions, the bending mechanism 400 of this embodiment also includes a transverse driving assembly 440. The transverse driving assembly 440 is used to drive the bending resistance assembly 410 to move in the left and right directions, so that the bending resistance assembly 410 abuts against the cable 500 at different axial positions, thereby driving the cable 500 to bend at different axial positions to complete various mechanical performance tests.

[0050] Specifically, the transverse driving assembly 440 of this embodiment also adopts a motor and a screw rod method. The frame 4223 is slidably installed on the base 230 along the left and right directions, and the transverse driving assembly 440 includes a transverse motor 441 and a transverse screw rod 442 that are mutually transmission-connected. The transverse screw rod 442 is threadedly transmission-connected to the frame 4223.

[0051] Meanwhile, for the connection between the fixture 100 and the cable 500, it is necessary to ensure the coaxiality and firmness of the end of the cable 500 and the fixture 100. The fixture 100 of this embodiment includes a clamp base 110, wherein the clamp base 110 is provided with a tapered clamping hole 111. The two ends of the tapered clamping hole 111 are respectively a large-mouth end 112 and a small-mouth end 113. The small-mouth ends 113 on the two fixtures 100 are arranged facing each other. The tapered clamping hole 111 is provided with at least two clamping pieces 120. The at least two clamping pieces 120 are annularly spaced to form a tapered cylinder combination structure for clamping the cable 500. During use, the cable 500 passes through the tapered cylinder combination structure, driving the fixture 100 to move towards the large-mouth end 112 side to tension the cable 500. At this time, the cable 500 moves towards the small-mouth end 113 side relative to the tapered clamping hole 111. Under the action of friction, the cable 500 pulls the tapered cylinder combination structure towards the small-mouth end 113 side. Under the guidance of the tapered surface of the tapered clamping hole 111, the clamping pieces 120 clamp the cable 500 to achieve locking of the cable 500. In this way, on the one hand, the coaxiality of the cable 500 and the tapered clamping hole 111 is ensured, and on the other hand, the firmness of locking the cable 500 is improved. During the stretching process, the harder the cable 500 is pulled, the tighter the clamping pieces 120 clamp the cable 500.

[0052] Further, in order to prevent the tapered cylinder combination structure from loosening when the two fixtures 100 approach each other, as Figure 8 shown, in this embodiment, a locking sleeve 130 that is axially adjustable is sleeved on the large-mouth end 112. A pressing elastic member 140 is provided between the locking sleeve 130 and the tapered cylinder combination structure. The pressing elastic member 140 axially pushes at least two clamping pieces 120 to move from the large-mouth end 112 towards the small-mouth end 113, causing the tapered cylinder combination structure to contract to clamp the cable 500. When clamping the cable 500, first control the locking sleeve 130 to move from the small-mouth end 113 towards the large-mouth end 112, reducing the elastic force provided by the pressing elastic member 140 to the tapered cylinder combination structure, so that the cable 500 can be sleeved into the tapered cylinder combination structure. Then control the locking sleeve 130 to move from the large-mouth end 112 towards the small-mouth end 113, squeezing the pressing elastic member 140, increasing the elastic force provided by the pressing elastic member 140 to the tapered cylinder combination structure, and pushing the tapered cylinder combination structure to move from the large-mouth end 112 towards the small-mouth end 113. Under the guidance of the tapered surface of the tapered clamping hole 111, the clamping pieces 120 clamp the cable 500 to pre-tighten the cable 500.

[0053] The locking sleeve 130 of this embodiment is threadedly connected to the large-mouth end 112, and the axial movement adjustment and self-locking are achieved through the threaded connection method, while the pressing elastic member 140 adopts a spring structure.

[0054] When performing the anti-twisting test, a torque is generated between the fixture 100 and the cable 500. To prevent the clamping piece 120 from rotating within the conical clamping hole 111, at least two limiting sliding portions 114 extending axially are provided on the inner peripheral wall of the conical clamping hole 111 in this embodiment. At least two clamping pieces 120 are respectively in axial sliding fit with at least two limiting sliding portions 114 to limit the rotation of the clamping piece 120 without interfering with the axial movement of the clamping piece 120. The limiting sliding portion 114 in this embodiment is of a groove structure, and a sliding boss 121 that is in sliding fit with the groove structure is provided on the outer wall of the clamping piece 120.

[0055] A friction structure that is in frictional contact with the cable 500 is provided on the inner peripheral surface of the clamping piece 120 in this embodiment to increase the frictional force between the clamping piece 120 and the cable 500, thereby improving the stability of clamping the cable 500.

[0056] As Figure 9 shown, the present invention also proposes a method for testing the mechanical properties of a cable 500, which is applicable to the above-mentioned cable mechanical property testing device. The method for testing the mechanical properties of the cable 500 includes: Step S100: Thread the cable 500 to be tested through the bending contact assembly 410; Step S200: Clamp the two ends of the cable 500 to be tested to two fixtures 100 respectively; Step S300: Control the bending contact assembly 410 to abut against the outer peripheral wall of the cable 500; Step S400: Control the bending contact assembly 410 to move along the third direction to a first preset position according to a first preset bending degree, and control the distance between the two fixtures 100 to a first preset value, so that the cable 500 is tightened and maintained for a first preset time period to complete a bending resistance performance test; Step S500: Control the bending contact assembly 410 to move along the third direction to a second preset position according to a second preset bending degree, and control the distance between the two fixtures 100 to a second preset value, apply a preset tensile force to the cable 500 and maintain it for a second preset time period to complete a tensile resistance performance test; Step S600: Control the bending contact assembly 410 to move along the third direction to a third preset position according to a third preset bending degree, and control the distance between the two fixtures 100 to a third preset value, control the two fixtures 100 to rotate in opposite directions, apply a preset torsion force to the cable 500 and maintain it for a third preset time period to complete a anti-twisting performance test; Step S700: Control to execute multiple consecutive anti-bending performance tests, multiple consecutive anti-tensile performance tests and multiple consecutive anti-twisting performance tests respectively, and between two adjacent anti-bending performance tests, between two adjacent anti-tensile performance tests and between two adjacent anti-twisting performance tests, control the cable 500 to rotate around its own axis according to a preset rotation angle interval, so that different positions on the periphery of the cable 500 face the direction of movement of the bending resistance component 410.

[0057] In step S100 and step S200, the cable 500 is passed through the channel 412 formed between the multiple resistance members 411, and then the two ends of the cable 500 are clamped. First, the locking sleeve 130 is loosened to reduce the elastic force provided by the compression elastic member 140 to the conical tube combination structure, so that the cable 500 is inserted into the conical tube combination structure. Then, the locking sleeve 130 is tightened to squeeze the compression elastic member 140, increase the elastic force provided by the compression elastic member 140 to the conical tube combination structure, and push the conical tube combination structure from the large-mouth end 112 to the small-mouth end 113. Under the guidance of the conical surface of the conical clamping hole 111, the clamping piece 120 hugs the cable 500 to achieve locking of the cable 500.

[0058] In step S300 , the plurality of resisting members 411 are driven by the plurality of resisting driving components 413 to move radially along the channel 412 to change the diameter of the channel 412 so that the plurality of resisting members 411 are in contact with the outer peripheral wall of the cable 500 .

[0059] In step S400, Figure 2 As shown, the bending drive component 420 drives the bending resistance component 410 to move in the up and down direction to the first preset position, that is, drives the middle part of the cable 500 to move upward to push the two ends of the cable 500 to bend downward, so that the angle between the cables 500 on both sides of the bending resistance component 410 is at a first preset curvature, and at the same time, the two clamps 100, driven by the tension drive component 220, move following the distance between the two ends of the cable 500, wherein the clamps 100 are consistent with the axes of the two ends of the cable 500, and the distance between the two clamps 100 is at a first preset value, so that the entire cable 500 maintains a first preset time period at the first preset curvature, wherein the first preset time period and the first preset curvature are determined according to the requirements of the bending resistance performance test, and the first preset value and the first preset position are determined according to the length of the cable 500.

[0060] In step S500, Figure 3As shown, the bending driving component 420 drives the bending contact component 410 to move in the up and down direction to the second preset position, so as to push the cable 500 to bend, making the included angle between the cables 500 on both sides of the bending contact component 410 reach the second preset bending degree. At the same time, the two clamps 100 are driven by the tension driving component 220 to move following the distance between the two ends of the cable 500. The clamps 100 are aligned with the axis of the two ends of the cable 500, and the tension driving component 220 drives the two force-applying moving frames 210 to move away from each other in the first direction, so as to drive the two clamps 100 to move away from each other in the left and right directions, controlling the distance between the two clamps 100 to the second preset value, applying a preset tensile force to the cable 500 and maintaining it for the second preset time period. Among them, the second preset time period, the second preset bending degree and the second preset value are determined according to the requirements of the tensile resistance performance test, and the second preset position is determined according to the length of the cable 500.

[0061] In step S600, as Figure 4 shown, the bending driving component 420 drives the bending contact component 410 to move in the third direction to the third preset position, so as to push the cable 500 to bend, making the included angle between the cables 500 on both sides of the bending contact component 410 reach the third preset bending degree. At the same time, the two clamps 100 are driven by the tension driving component 220 to move following the distance between the two ends of the cable 500. The clamps 100 are aligned with the axis of the two ends of the cable 500, and the distance between the two clamps 100 is made to reach the third preset value. Then, the two torque driving components 300 drive the two clamps 100 to rotate in opposite directions respectively, applying a preset torque to the cable 500. Among them, the third preset time period and the third preset bending degree are determined according to the requirements of the anti-twisting performance test, and the third preset value and the third preset position are determined according to the length of the cable 500.

[0062] In step S700, the two torque driving components 300 drive the two clamps 100 to rotate in the same direction by a preset rotation angle interval respectively, so as to control the cable 500 to rotate around its own axis, making different positions on the outer periphery of the cable 500 face the direction in which the bending contact component 410 moves in the up and down direction. In this way, the bending contact component 410 can push different positions on the outer periphery of the cable 500 to bend. At this time, the bending contact component 410 only needs to move in one direction, so as to simulate the situation where the cable 500 bends in different directions during actual installation and use.

[0063] If the preset rotation angle interval is set to 60 degrees, then the cable 500 needs to be subjected to 6 times of anti-bending performance tests, tensile resistance performance tests and anti-twisting performance tests respectively.

[0064] As Figure 10The control flow chart of the simulated cable 500 shown when it is shaken under external influence. The mechanical property test method of the cable 500 in this embodiment further includes step S800: Step S800, during each tensile resistance test, tensile resistance test, and torsional resistance test, control the center position of the channel 412 to be eccentrically arranged with the axis of the rotating ring 431 according to a preset eccentric distance, and then control the rotating ring 431 to rotate around its own axis according to a preset rotation speed.

[0065] Specifically, when it is necessary to test the cable 500 in a shaken state, adjust the bending degree, tensile force, or torsion of the cable 500 to a set value, and adjust the positions of the plurality of abutting members 411 by controlling the driving strokes of the plurality of abutting driving members 413, so as to change the center position of the channel 412, and make the center position of the channel 412 eccentrically arranged with the center position of the rotating ring 431 according to a set distance. It can be understood that the axis of the cable 500 is eccentrically arranged with the center position of the rotating ring 431, and then drive the rotating ring 431 to rotate through the rotation driving structure 432, so as to drive the bent part of the cable 500 to shake. At the same time, it is also possible to control the rotation driving structure 432 to drive the rotating ring 431 to rotate reciprocally according to a set amplitude and frequency, so as to simulate the swing of the cable 500 and perform dynamic testing on the cable 500.

[0066] As Figure 11 The control flow chart of the simulated cable 500 shown when it is bent at different axial positions. The mechanical property test method of the cable 500 in this embodiment further includes step S900: In step S900, between two adjacent bending resistance tests, between two adjacent tensile resistance tests, and between two adjacent torsional resistance tests, control the bending abutting assembly 410 to move along the first direction to a preset moving position, so that the bending abutting assembly 410 abuts against different positions in the axial direction of the cable 500.

[0067] Specifically, drive the frame 4223 to move in the left - right direction through the lateral movement driving assembly 440, so as to drive the bending abutting assembly 410 to move in the left - right direction to a preset moving position, and make the bending abutting assembly 410 abut against different positions in the axial direction of the cable 500, thereby driving the cable 500 to bend at different positions in the axial direction to complete various mechanical property tests.

[0068] In some embodiments, two angle sensors, two tension sensors, two torque sensors, and multiple displacement sensors are also provided. The two angle sensors are respectively installed between the two force-applying moving frames 210 and the two swing seats 211. The two tension sensors are respectively installed on the two clamps 100. The two torque sensors are respectively installed between the two rotating disks 310 and the two swing seats 211. The multiple displacement sensors are respectively installed on the two force-applying moving frames 210, the frame 4223, and the base 230. Among them, the angle sensors are used to detect the swing angle of the clamp 100, and the bending degree of the cable 500 is calculated based on the swing angles of the two clamps 100 and the distance between the two clamps 100. The tension sensors are used to detect the axial force between the clamp 100 and the cable 500 to detect the tensile force applied to the cable 500. The torque sensors are used to detect the torque between the clamp 100 and the cable 500 to detect the torque applied to the cable 500. The displacement sensors are used to detect the moving positions of the bending contact assembly 410 and the force-applying moving frame 210.

[0069] Through one-time clamping of the cable 500, the present invention can continuously complete the tensile resistance performance test, the anti-twisting performance test, and the anti-bending performance test of the cable 500, and can simulate different actual installation and use scenarios of the cable 500, improving the accuracy of the test results of the tensile resistance, anti-twisting, and anti-bending properties of the cable 500.

[0070] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A cable mechanical property testing device, characterized in that, include: A clamping mechanism, comprising two clamps, wherein the two clamps are used to clamp two ends of the cable; The tension applying mechanism comprises two force applying mobile frames and a tension driving assembly, wherein the two force applying mobile frames are both provided with a swing seat, and the two clamps are respectively arranged on the two swing seats, and the swing seats are swingingly arranged relative to the force applying mobile frames around a swing axis extending along a second direction, so that the two clamps respectively swing around the swing axis following the axial direction of the two ends of the cable, and the clamps are rotatably arranged relative to the swing seats around the axis of the cable, and the tension driving assembly is used to drive the two force applying mobile frames to move closer to and away from each other along the first direction, so as to adjust the distance between the two clamps and apply axial tensile force to the cable; The torque applying mechanism comprises two torque driving assemblies respectively mounted on the two swing seats, the two torque driving assemblies respectively driving the two clamps to rotate, so as to drive the cable to rotate around its own axis and apply torque to the cable; The bending mechanism comprises a bending resistance component located between the two clamps, and a bending drive component drivingly connected to the bending resistance component, wherein the bending resistance component is used for slidingly abutting against the outer peripheral wall of the cable, and the bending drive component is used for driving the bending resistance component to move along a third direction to promote the bending of the cable, and the bending resistance component comprises a plurality of resistance members slidingly abutting against the outer peripheral wall of the cable, and the plurality of resistance members are arranged in an annular manner to form a channel for the cable to pass through, and the axial direction of the channel extends along the first direction, and the bending resistance component also comprises a plurality of resistance drive members drivingly connected to the plurality of resistance members one by one, and the plurality of resistance drive members are respectively used for driving the plurality of resistance members to move along the radial direction of the channel to change the caliber size of the channel and the center position of the channel; Wherein, the first direction, the second direction and the third direction are arranged perpendicular to each other.

2. The cable mechanical properties testing device according to claim 1, characterized in that: The bending mechanism also includes a rotation drive component, which includes a rotating ring extending axially along the first direction, a rotation drive structure connected to the rotating ring transmission, and a plurality of the interference members are arranged on the rotating ring in a ring-shaped interval with the axis of the rotating ring. The rotation drive structure is used to drive the rotating ring to rotate around its own axis, and the plurality of interference drive components synchronously drive the interference members to move radially, so that the center position of the channel is eccentric to the rotation center of the rotating ring, so as to drive the cable to shake.

3. The cable mechanical properties testing device according to claim 2, characterized in that: The abutment member is a universal wheel, and the outer peripheral wheel wall of the universal wheel abuts against the outer peripheral wall of the cable.

4. The cable mechanical properties testing device according to claim 1, characterized in that: The bending mechanism further comprises a transverse driving assembly, and the transverse driving assembly is used for driving the bending abutment assembly to move along the first direction so that the bending abutment assembly abuts against the cable at different positions in the axial direction.

5. The cable mechanical property testing device according to claim 1, wherein: The fixture includes a clamping seat, the clamping seat is provided with a tapered clamping hole extending along the first direction, two ends of the tapered clamping hole are respectively a large-mouth end and a small-mouth end, the small-mouth ends on the two fixtures are arranged facing each other, and the tapered clamping hole is provided with at least two clamping pieces, and at least two clamping pieces are arranged at intervals along the circumferential direction of the tapered clamping hole to form a tapered cylinder combined structure for clamping the cable.

6. The cable mechanical property testing device according to claim 5, wherein: A lock sleeve adjustable axially is sleeved on the large-mouth end, and a pressing elastic member is arranged between the lock sleeve and the tapered cylinder structure. The pressing elastic member axially pushes at least two clamping pieces to move from the large-mouth end to the small-mouth end, so that the tapered cylinder combined structure shrinks to clamp the cable; At least two limiting sliding parts extending axially are arranged on the inner peripheral wall of the tapered clamping hole, and at least two clamping pieces are respectively in axial sliding fit with at least two limiting sliding parts.

7. A method for testing the mechanical properties of a cable, characterized in that: Applicable to the cable mechanical property testing device according to any one of claims 1 to 6, the cable mechanical property testing method includes: Threading the cable to be tested through the bending contact assembly; Clamping two ends of the cable to be tested on the two fixtures respectively; Controlling the bending contact assembly to abut against the outer peripheral wall of the cable; Controlling the bending contact assembly to move to a first preset position along the third direction according to a first preset bending degree, and controlling the distance between the two fixtures to a first preset value, so that the cable is tightened and maintained for a first preset time period to complete a bending resistance performance test; Controlling the bending contact assembly to move to a second preset position along the third direction according to a second preset bending degree, and controlling the distance between the two fixtures to a second preset value, applying a preset tensile force to the cable and maintaining for a second preset time period to complete a tensile resistance performance test; Controlling the bending contact assembly to move to a third preset position along the third direction according to a third preset bending degree, and controlling the distance between the two fixtures to a third preset value, controlling the two fixtures to rotate in opposite directions, applying a preset torsion force to the cable and maintaining for a third preset time period to complete a torsion resistance performance test; Controlling to respectively perform a plurality of consecutive bending resistance performance tests, a plurality of consecutive tensile resistance performance tests and a plurality of consecutive torsion resistance performance tests, and controlling the cable to rotate around its own axis according to a preset rotation angle interval between two adjacent bending resistance performance tests, between two adjacent tensile resistance performance tests, and between two adjacent torsion resistance performance tests, so that different positions on the outer periphery of the cable face the moving direction of the bending contact assembly.

8. The cable mechanical property testing method according to claim 7, wherein: The bending mechanism further includes a rotation driving assembly and a transverse movement driving assembly. The rotation driving assembly includes a rotating ring with an axis extending along the first direction and a rotation driving structure for driving the rotating ring to rotate about its own axis. A plurality of the abutting members are arranged at the rotating ring at annular intervals with the axis of the rotating ring as the center. The transverse movement driving assembly is used for driving the bending abutting assembly to move along the first direction; The cable mechanical property testing method further includes: During each of the tensile property test, the tensile property test, and the torsional property test, the central position of the channel is controlled to be eccentrically arranged with respect to the axis of the rotating ring according to a preset eccentric distance, and then the rotating ring is controlled to rotate about its own axis according to a preset rotation speed; Between two adjacent bending property tests, between two adjacent tensile property tests, and between two adjacent torsional property tests, the bending abutting assembly is controlled to move along the first direction to a preset moving position so that the bending abutting assembly abuts against different positions in the axial direction of the cable.

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