A device and method for detecting the wear resistance of wire and cable

Abstract

The present application relates to a wear resistance detection device for wire and cable, belonging to the technical field of cable performance detection tests. It includes a base, on which a bracket is fixedly arranged, and on the bracket, an arc-shaped working ring is fixedly arranged. On both ends of the working ring on the base, guide rails are fixedly arranged. Inside the guide rails, a driving seat is slidably arranged along the length direction of the guide rails. A clamping assembly is arranged on the driving seat, and a driving mechanism for driving the two driving seats to slide is arranged on the base. A friction assembly for grinding the cable located on the working ring is arranged on the base. During operation, the cable is wound around the working ring, and the two ends of the cable are clamped by the clamping assembly. Then, the two ends of the cable are driven by the driving mechanism to perform reciprocating linear motion along the guide rails, while at the same time, the cable moves on the arc surface of the working ring, so that the cable makes relative motion with respect to the friction assembly, realizing the friction test on the cable in a bent state and improving the accuracy of detecting the wear resistance of the cable.

Description

Technical Field

[0001] This application relates to the technical field of cable performance detection tests, and particularly relates to a wear resistance detection device and detection method for wires and cables. Background Art

[0002] A cable includes an internal conductor and an outer wrapped insulating layer, and is usually used for power or signal transmission. During the use of the cable, it is inevitable to have relative friction with external substances. In order to ensure the service life of the cable, it is necessary to conduct a wear resistance test on the insulating layer of the cable after production. Currently, the conventional method is to conduct a reciprocating sliding friction test on the insulating layer through a friction member.

[0003] Chinese patent document with application publication number CN114034546A discloses a wear resistance detection device for wires and cables, including a mounting base. Two support frames are symmetrically arranged on the upper surface of the mounting base. A limiting groove is formed on the opposite side of the support frames and a first sliding block is slidably connected through the limiting groove. A friction mechanism for repeatedly testing the wear resistance of the cable is arranged on the first sliding block. A first clamp is fixedly installed on one side of the upper surfaces of the two support frames, and a second clamp is arranged on the side of the two support frames far from the first clamp.

[0004] In view of the above related technologies, in the actual working environment, the cable includes various complex working states such as straight sections and bent sections. Usually, the cable in the bent state has more serious fatigue wear after being rubbed; the friction test of the existing wear resistance detection device is difficult to accurately reflect the wear resistance of the cable, and there is an urgent need for improvement. Summary of the Invention

[0005] On the one hand, in order to more accurately detect the wear resistance of the cable, this application provides a wear resistance detection device for wires and cables.

[0006] A wear resistance detection device for wires and cables provided by this application adopts the following technical solutions:

[0007] A wear resistance detection device for wires and cables includes a base. A bracket is fixedly arranged on the base. An arc-shaped working ring is fixedly arranged on the bracket. The arc-shaped surface of the working ring is used to abut against the cable. Guide rails are fixedly arranged at both ends of the working ring on the base. A driving seat is slidably arranged in the guide rail along the length direction of the guide rail. A clamping assembly for clamping the cable is arranged on the driving seat. A driving mechanism for driving the two driving seats to slide is arranged on the base. A friction assembly for grinding the cable located on the working ring is arranged on the base.

[0008] By adopting the above technical solution, during operation, the cable is wound around the working ring, and both ends of the cable are clamped by the clamping assembly. Then, the driving mechanism drives both ends of the cable to perform reciprocating linear motion along the guide rail, and at the same time, the cable moves on the arc surface of the working ring, so that the cable makes relative motion relative to the friction assembly, realizing the friction test on the cable in a bent state and improving the accuracy of detecting the wear resistance of the cable.

[0009] Optionally, the friction assembly includes a bottom plate, a lifting plate, a friction member and a power member. The friction member is arranged on the side wall of the lifting plate close to the working ring. The lifting plate is slidably arranged on the base in the vertical direction. The power member is arranged on the bottom plate and is used to drive the lifting plate to move up and down.

[0010] By adopting the above technical solution, during operation, the power member drives the lifting plate to move up and down, and the lifting plate drives the friction member to move, so that the cable is subjected to the friction force brought by the relative motion perpendicular to the length direction of the cable, realizing the simulation of the scenario where the cable is subjected to multi-angle acting forces under complex working conditions and improving the accuracy of the test results.

[0011] Optionally, the friction member is detachably arranged on the lifting plate, and the friction member includes a first friction plate and a second friction plate with different friction coefficients.

[0012] By adopting the above technical solution, the first friction plate and the second friction plate with different friction coefficients are arranged on the lifting plate, realizing the simulation of the scenario where the cable is subjected to changing acting forces under complex working conditions and improving the accuracy of the test results.

[0013] Optionally, a column is fixedly arranged on the base, an adjusting seat is fixedly arranged on the column, the bottom plate is slidably arranged on the adjusting seat in a direction close to or away from the working ring, and an adjusting assembly for adjusting the position of the bottom plate is arranged on the adjusting seat.

[0014] By adopting the above technical solution, the position of the bottom plate on the adjusting seat is adjusted by the adjusting assembly, realizing the adjustment of the distance between the friction member and the working ring to adapt to cables of different sizes and increasing the applicability.

[0015] Optionally, an adjusting groove is formed in the adjusting seat, a slider is slidably arranged in the adjusting groove, the bottom plate is fixedly arranged on the slider, the adjusting assembly includes an adjusting screw and an elastic member, the adjusting screw is threadedly penetrated through the adjusting seat along the length direction of the adjusting groove, one end of the adjusting screw is used for abutting against the slider, and the elastic member is arranged in the adjusting groove for driving the slider to abut against the adjusting screw.

[0016] By adopting the above technical solution, when the size of the cable is large, the adjusting screw is rotated, and the adjusting screw moves in the direction away from the working ring, and the elastic member pushes the slider to abut against the adjusting screw, so that the slider moves away from the working ring, thereby achieving the purpose of increasing the distance between the friction member and the working ring, and the operation is simple and convenient.

[0017] Optionally, the driving mechanism includes a driving shaft, a driving block and a driving assembly, the two guide rails are coaxially arranged, and the driving shaft is slidably arranged on the base along a length direction parallel to the guide rails; the bottom wall of the guide rail is provided with a strip hole along its own length direction, the driving block is fixedly arranged on the driving shaft, the driving block is slidably passed through the strip hole and is fixedly connected to the driving seat, and the driving assembly is arranged on the base to drive the driving shaft to perform reciprocating linear motion.

[0018] By adopting the above technical solution, the driving assembly drives the driving shaft to rotate, the driving shaft drives the two driving blocks to move synchronously, and the two driving blocks drive the two driving seats to perform reciprocating linear motion, thereby achieving the purpose of driving the cable to move.

[0019] Optionally, the driving assembly includes a driving frame, a rack, an incomplete gear and a driving motor, one end of the driving frame is fixedly connected to one end of the driving shaft, the driving motor is fixedly set on the base, the incomplete gear is fixedly set on the output shaft of the driving motor, two racks are set opposite each other, the rack is fixedly set in the driving frame, and the incomplete gear is used to engage with the two racks.

[0020] By adopting the above technical solution, the drive motor is started, the drive motor drives the incomplete gear to rotate, the incomplete gear drives the rack and the drive frame to move, the drive frame drives the drive shaft to move, and the purpose of driving the two drive seats to reciprocate synchronously is achieved.

[0021] Optionally, the side wall of the working ring for abutting the cable is provided with a limiting groove along the circumference of the working ring, the bottom wall of the limiting groove is provided with a plurality of openings, and a plurality of rollers are rotatably provided on the side of the working ring away from the cable, and the rollers are embedded in the openings for rolling contact with the cable.

[0022] By adopting the above technical solution, the limit groove guides and limits the cable to prevent the cable from escaping from the working ring, while the roller passes through the opening and contacts the cable surface; since cable damage affects the structural strength of the entire cable, reducing the friction resistance of the cable during movement can reduce the impact of cable damage on the accuracy of the test results.

[0023] Optionally, the clamping assembly includes a clamping block and a clamping cylinder. A clamping groove is formed in the side wall of the driving seat. The clamping block is hinged to the driving seat. One end of the clamping block is provided with a clamping head for abutting against the cable. The clamping cylinder is hinged to the driving seat and is used to drive the clamping block to deflect so that the clamping head abuts tightly against the cable.

[0024] By adopting the above technical solution, during the test, after the cable is placed in the clamping groove, the clamping cylinder is started. The clamping cylinder drives the clamping block to deflect, so that the clamping head gradually abuts against the cable, achieving the purpose of limiting the position of the cable, and the operation is convenient.

[0025] On the other hand, in order to more accurately detect the wear resistance of the cable, the present application provides a method for detecting the wear resistance of wire and cable.

[0026] A method for detecting the wear resistance of wire and cable includes the following steps:

[0027] S1. Wind the cable to be detected around the working ring, place the two ends of the cable on the driving seats of the two guide rails respectively, and then clamp the cable through the clamping assembly;

[0028] S2. Start the driving mechanism, and drive the cable to reciprocate along the working ring through the driving mechanism. The friction assembly performs a friction test on the cable in a bent state on the working ring.

[0029] By adopting the above technical solution, during the test, the cable is wound around the working ring, the driving mechanism drives the cable to reciprocate, and the friction assembly performs a friction test on the cable in a bent state on the working ring, improving the accuracy of detecting the wear resistance of the cable.

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

[0031] 1. During work, wind the cable around the working ring, clamp the two ends of the cable through the clamping assembly, and then drive the two ends of the cable to perform reciprocating linear motion along the guide rail through the driving mechanism, while making the cable move on the arc surface of the working ring, so that the cable moves relative to the friction assembly, realizing a friction test on the cable in a bent state, and improving the accuracy of detecting the wear resistance of the cable;

[0032] 2. During work, drive the lifting plate to move up and down through the power member, and the lifting plate drives the friction member to move, so that the cable is subjected to the friction force brought by the relative motion perpendicular to the length direction of the cable, realizing the simulation of the scenario where the cable is subjected to multi-angle acting forces under complex working conditions, and improving the accuracy of the test results. Description of the Drawings

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0034] Figure 2 It is a schematic structural diagram mainly showing the guide rail and the clamping assembly in the embodiment of the present application;

[0035] Figure 3 It is a schematic structural diagram mainly showing the guide rail in the embodiment of the present application;

[0036] Figure 4 It is a schematic structural diagram mainly showing the friction assembly in the embodiment of the present application.

[0037] Explanation of reference numerals: 1, base; 11, bracket; 12, support rod; 13, column; 2, working ring; 21, limiting groove; 211, opening; 22, roller; 221, screw; 2211, nut; 23, ear plate; 231, mounting groove; 24, support plate; 25, guide wheel; 3, guide rail; 31, strip hole; 4, driving seat; 41, groove; 42, clamping groove; 5, clamping assembly; 51, clamping block; 511, clamping head; 52, clamping cylinder; 61, driving shaft; 62, driving block; 63, driving assembly; 631, driving frame; 632, rack; 633, incomplete gear; 634, driving motor; 7, friction assembly; 71, bottom plate; 72, lifting plate; 721, dovetail groove; 722, dovetail block; 723, bonding plate; 73, friction member; 731, first friction plate; 732, second friction plate; 74, power member; 8, adjusting seat; 81, adjusting groove; 811, slider; 9, adjusting assembly; 91, adjusting screw; 92, elastic member. Detailed implementation manners

[0038] The following will Figures 1-4 further describe the present application in detail with reference to the attached

[0039] The embodiment of the present application discloses a device for detecting the wear resistance of wire and cable.

[0040] Referring to Figure 1 , a device for detecting the wear resistance of wire and cable includes a base 1, a bracket 11 is fixedly arranged on the base 1, an arc-shaped working ring 2 is fixedly arranged on the bracket 11, the working ring 2 is of a semi-circular structure as a whole, and the arc surface of the working ring 2 is used for abutting against the cable.

[0041] Referring to Figure 1 and Figure 2 , guide rails 3 are fixedly arranged at both ends of the working ring 2 on the base 1, a support rod 12 is fixedly arranged on the base 1, the guide rails 3 are fixedly arranged on the support rod 12, the two guide rails 3 are on the same straight line, and strip holes 31 are formed in the bottom wall of the guide rail 3 along the length direction of the guide rail 3. A driving seat 4 is slidably arranged in the guide rail 3 along the length direction of the guide rail 3, the driving seat 4 is adapted to the guide rail 3, and a groove 41 is formed in the top wall of the driving groove, and the cable is placed in the groove 41.

[0042] Reference Figure 2 , a clamping assembly 5 for clamping the cable is provided on the driving seat 4, and the clamping assembly 5 includes a clamping block 51 and a clamping cylinder 52. A clamping groove 42 is formed on the side wall of the driving seat 4. The clamping block 51 is hinged in the clamping groove 42 of the driving seat 4. One end of the clamping block 51 is provided with a clamping head 511 for abutting against the cable, and the side wall of the clamping head 511 in contact with the cable is an arc surface. The clamping cylinder 52 is hinged on the driving seat 4 to drive the clamping block 51 to deflect so that the clamping head 511 abuts tightly against the cable.

[0043] Reference Figure 1 and Figure 2 , a driving mechanism for driving the two driving seats 4 to slide is provided on the base 1, and the driving mechanism includes a driving shaft 61, a driving block 62 and a driving assembly 63. The driving shaft 61 is slidably arranged on the base 1 along the length direction parallel to the guide rail 3. The driving block 62 is fixedly arranged on the driving shaft 61. The driving block 62 slidably penetrates through the strip-shaped hole 31 and is fixedly connected to the driving seat 4.

[0044] Reference Figure 1 , the driving assembly 63 is arranged on the base 1 to drive the driving shaft 61 to perform a reciprocating linear motion. The driving assembly 63 includes a driving frame 631, a rack 632, an incomplete gear 633 and a driving motor 634. One end of the driving frame 631 is fixedly connected to one end of the driving shaft 61. The driving motor 634 is fixedly arranged on the base 1. The incomplete gear 633 is fixedly arranged on the output shaft of the driving motor 634. Two racks 632 are arranged opposite to each other. The racks 632 are fixedly arranged in the driving frame 631. The incomplete gear 633 is used to mesh with the two racks 632.

[0045] Among them, reference Figure 1 and Figure 3 , a limiting groove 21 is formed in the circumferential direction of the side wall of the working ring 2 for abutting against the cable. A plurality of through holes 211 are formed in the bottom wall of the limiting groove 21. A plurality of rollers 22 are rotatably arranged on the side of the working ring 2 away from the cable. The rollers 22 are embedded in the through holes 211 for rolling contact with the cable. Ear plates 23 are fixedly arranged on both the top wall and the bottom wall of the working ring 2, and the ear plates 23 are arranged along the length direction of the working ring 2. An installation groove 231 is formed in the radial direction of the ear plate 23 away from the limiting groove 21. Screws 221 are coaxially rotatably arranged at both ends of the roller 22. The screws 221 penetrate through the installation groove 231 in the vertical direction. A nut 2211 is threadedly connected to the screw 221, and the nut 2211 abuts tightly against the ear plate 23. Support plates 24 are fixedly arranged at both ends of the working ring 2. Guide wheels 25 are vertically rotatably arranged on the support plates 24 for guiding and limiting the cable.

[0046] The limiting groove 21 guides and positions the cable, preventing the cable from detaching from the working ring 2, and the roller 22 passes through the opening 211 and contacts the surface of the cable; since cable damage affects the structural strength of the entire cable and reduces the frictional resistance of the cable during movement, cable damage can be reduced to affect the accuracy of the test results.

[0047] Referring to Figure 1 and Figure 4 As shown in, a friction assembly 7 for polishing the cable on the working ring 2 is provided on the base 1. The friction assembly 7 includes a base plate 71, a lifting plate 72, a friction member 73 and a power member 74. A column 13 is fixedly provided on the base 1, and an adjusting seat 8 is fixedly provided on the column 13. The base plate 71 is slidably arranged on the adjusting seat 8 in a direction close to or away from the working ring 2. An adjusting groove 81 is formed in the adjusting seat 8, and a slider 811 is slidably arranged in the adjusting groove 81.

[0048] Referring to Figure 4 As shown in, the lifting plate 72 is slidably arranged on the base 1 in the vertical direction. The base plate 71 is fixedly arranged on the slider 811. The power member 74 is arranged on the base plate 71 to drive the lifting plate 72 to move up and down. The power member 74 is set as a cylinder, and the cylinder is vertically and fixedly arranged on the base plate 71. The piston rod of the cylinder is fixedly connected to the lifting plate 72.

[0049] Referring to Figure 4 As shown in, the friction member 73 is arranged on the side wall of the lifting plate 72 close to the working ring 2. The friction member 73 is detachably arranged on the lifting plate 72, and the friction member 73 includes a first friction plate 731 and a second friction plate 732 with different friction coefficients. The first friction plate 731 and the second friction plate 732 can be made of fabric. Specifically, a dovetail groove 721 is formed in the side wall of the lifting plate 72 close to the working ring 2, and a dovetail block 722 is slidably arranged in the dovetail groove 721. A bonding plate 723 is fixedly arranged on the dovetail block 722. There are two bonding plates 723, and the first friction plate 731 and the second friction plate 732 are respectively fixedly arranged on the bonding plates 723. In this embodiment, the first friction plate 731 and the second friction plate 732 are bonded to the bonding plates 723. By arranging the first friction plate 731 and the second friction plate 732 with different friction coefficients on the lifting plate 72, the scenario of the cable being subjected to changing acting forces under complex working conditions is simulated, and the accuracy of the test results is improved.

[0050] Among them, referring to Figure 4, an adjustment assembly 9 for adjusting the position of the bottom plate 71 is provided on the adjustment seat 8. The adjustment assembly 9 includes an adjustment screw 91 and an elastic member 92. The adjustment screw 91 is threadedly disposed on the adjustment seat 8 along the length direction of the adjustment groove 81, and one end of the adjustment screw 91 is used to abut against the slider 811. The elastic member 92 is disposed in the adjustment groove 81 for driving the slider 811 to abut against the adjustment screw 91. The elastic member 92 is set as a compression spring. One end of the compression spring abuts against one end of the adjustment groove 81 close to the working ring 2, and the other end abuts against the slider 811.

[0051] When the size of the cable is large, rotate the adjustment screw 91. The adjustment screw 91 moves in a direction away from the working ring 2, and the elastic member 92 pushes the slider 811 to abut against the adjustment screw 91, so that the slider 811 moves away from the working ring 2, achieving the purpose of increasing the distance between the friction member 73 and the working ring 2, and the operation is simple and convenient.

[0052] The implementation principle of the embodiment of the present application is as follows: During work, wind the cable around the working ring 2, and clamp both ends of the cable through the clamping assembly 5; start the driving motor 634, the driving motor 634 drives the incomplete gear 633 to rotate, the incomplete gear 633 drives the rack 632 and the driving frame 631 to move, the driving frame 631 drives the driving shaft 61 to move, the driving shaft 61 drives the two driving blocks 62 to move synchronously, and the two driving blocks 62 drive the two driving seats 4 to perform reciprocating linear motion. At the same time, the cable moves on the arc surface of the working ring 2, so that the cable moves relative to the friction assembly 7, realizing the friction test on the cable in a bent state and improving the accuracy of detecting the wear resistance of the cable.

[0053] The embodiment of the present application also discloses a method for detecting the wear resistance of wire and cable.

[0054] A method for detecting the wear resistance of wire and cable includes the following steps:

[0055] S1. Wind the cable to be detected around the working ring 2, place both ends of the cable on the driving seats 4 of the two guide rails 3 respectively, and then clamp the cable through the clamping assembly 5.

[0056] S2. Start the driving mechanism, and drive the cable to reciprocate along the working ring 2 through the driving mechanism, and the friction assembly 7 performs a friction test on the cable in a bent state on the working ring 2.

[0057] During the test, the cable is wound around the working ring 2, the driving mechanism drives the cable to reciprocate, and the friction assembly 7 performs a friction test on the cable in a bent state on the working ring 2, improving the accuracy of detecting the wear resistance of the cable.

[0058] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A device for detecting the abrasion resistance of wire and cable, including a base (1), characterized in that: A bracket (11) is fixedly arranged on the base (1), an arc-shaped working ring (2) is fixedly arranged on the bracket (11), the arc-shaped surface of the working ring (2) is used for abutting against a cable, guide rails (3) are fixedly arranged at both ends of the working ring (2) on the base (1), a driving seat (4) is slidably arranged in the guide rail (3) along the length direction of the guide rail (3), a clamping assembly (5) for clamping the cable is arranged on the driving seat (4), a driving mechanism for driving the two driving seats (4) to slide is arranged on the base (1), and a friction assembly (7) for polishing the cable located on the working ring (2) is arranged on the base (1); The driving mechanism includes a driving shaft (61), a driving block (62) and a driving assembly (63). The two guide rails (3) are coaxially arranged, and the driving shaft (61) is slidably arranged on the base (1) along the length direction parallel to the guide rail (3); a strip-shaped hole (31) is formed in the bottom wall of the guide rail (3) along its length direction, the driving block (62) is fixedly arranged on the driving shaft (61), the driving block (62) slidably penetrates through the strip-shaped hole (31) and is fixedly connected with the driving seat (4), and the driving assembly (63) is arranged on the base (1) for driving the driving shaft (61) to perform a reciprocating linear motion; The driving assembly (63) includes a driving frame (631), a rack (632), an incomplete gear (633) and a driving motor (634). One end of the driving frame (631) is fixedly connected with one end of the driving shaft (61), the driving motor (634) is fixedly arranged on the base (1), the incomplete gear (633) is fixedly arranged on the output shaft of the driving motor (634), two racks (632) are arranged opposite to each other, the racks (632) are fixedly arranged in the driving frame (631), and the incomplete gear (633) is used for meshing with the two racks (632); A limiting groove (21) is formed in the side wall of the working ring (2) for abutting against the cable along the circumferential direction of the working ring (2), a plurality of through holes (211) are formed in the bottom wall of the limiting groove (21), a plurality of roller shafts (22) are rotatably arranged on the working ring (2), and the roller shafts (22) are embedded in the through holes (211) for rolling contact with the cable; The clamping assembly (5) includes a clamping block (51) and a clamping cylinder (52). A clamping groove (42) is formed in the side wall of the driving seat (4), the clamping block (51) is hinged to the driving seat (4), one end of the clamping block (51) is provided with a clamping head (511) for abutting against the cable, and the clamping cylinder (52) is hinged to the driving seat (4) for driving the clamping block (51) to deflect so that the clamping head (511) abuts tightly against the cable.

2. The wire and cable abrasion resistance detection device according to claim 1, characterized in that: The friction assembly (7) includes a bottom plate (71), a lifting plate (72), a friction member (73) and a power member (74). The friction member (73) is disposed on the side wall of the lifting plate (72) close to the working ring (2). The lifting plate (72) is slidably disposed on the base (1) in the vertical direction. The power member (74) is disposed on the bottom plate (71) and is used to drive the lifting plate (72) to move up and down.

3. The abrasion resistance testing device for wire and cable according to claim 2, wherein: The friction member (73) is detachably disposed on the lifting plate (72), and the friction member (73) includes a first friction plate (731) and a second friction plate (732) with different friction coefficients.

4. An apparatus for detecting the abrasion resistance of wire and cable according to claim 3, characterized in that: A column (13) is fixedly disposed on the base (1), and an adjusting seat (8) is fixedly disposed on the column (13). The bottom plate (71) is slidably disposed on the adjusting seat (8) in a direction close to or away from the working ring (2). An adjusting assembly (9) for adjusting the position of the bottom plate (71) is disposed on the adjusting seat (8).

5. The wire and cable abrasion resistance detection device according to claim 4, characterized in that: An adjusting groove (81) is formed on the adjusting seat (8), and a slider (811) is slidably disposed in the adjusting groove (81). The bottom plate (71) is fixedly disposed on the slider (811). The adjusting assembly (9) includes an adjusting screw (91) and an elastic member (92). The adjusting screw (91) is threadedly disposed through the adjusting seat (8) along the length direction of the adjusting groove (81). One end of the adjusting screw (91) is used to abut against the slider (811). The elastic member (92) is disposed in the adjusting groove (81) and is used to urge the slider (811) to abut against the adjusting screw (91).

6. A detection method for a wire and cable abrasion resistance performance detection device according to any one of claims 1-5, characterized in that: It includes the following steps: S1. Wind the cable to be detected around the working ring (2), place the two ends of the cable on the driving seats (4) of the two guide rails (3) respectively, and then clamp the cable through the clamping assembly (5). S2. Start the driving mechanism, drive the cable to reciprocate along the working ring (2) through the driving mechanism, and the friction assembly (7) performs a friction test on the cable in a bent state on the working ring (2).

Images