Low voltage cable tensile testing device

Abstract

The application relates to the technical field of cable tensile test, and discloses a low-voltage cable tensile test device, which comprises a main body and further comprises a clamping mechanism, a clamping mechanism is installed on the top of the main body, when the device is used, the clamping mechanism can be used to clamp the cable when the cable is detected, an auxiliary mechanism is installed in the inside of the clamping mechanism, and is used to prevent the cable from falling off again after the working movement of the clamping mechanism is completed. The simultaneous movement of the two recovery blocks outside the cable can make the cable be subjected to a larger extrusion force, the cable provides traction to make the recovery block movement provide extrusion force for the cable, because the recovery block is eccentric movement, the greater the traction provided by the cable, the greater the extrusion force provided by the recovery block for the cable, so that the falling off of the cable is limited, and the stability and efficiency during the cable test are improved.

Description

Technical Field

[0001] This invention relates to the field of cable tensile testing technology, specifically to a low-voltage cable tensile testing device. Background Technology

[0002] Cables are key components used in power, communication and data transmission. Cables often need to operate under various environmental and stress conditions, so the tensile performance test of cables is very important. The tensile performance test parameters of cables directly reflect the cable's load-bearing capacity, breaking strength and elongation. During use, the operator first places both ends of the cable into the designated clamps. The movement of the motor drives one side of the clamps to perform a tensile test on the cable. When the cable is stretched and the portion of the cable end located in the clamps is subjected to excessive tension, the sheath outside the clamped portion of the cable is prone to breakage. This can easily cause the cable to shift or fall off during clamping, affecting the accuracy of the data during the cable tensile test, as well as the stability of the cable and the efficiency of subsequent measurements. Summary of the Invention

[0003] The purpose of this invention is to provide a low-voltage cable tensile testing device to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a low-voltage cable tensile testing device, comprising a main body and further comprising; The clamping mechanism is installed on the top of the main body and is used to clamp the cable when the equipment is to be used for testing. The auxiliary mechanism is installed inside the clamping mechanism to prevent the cable from falling off again after the clamping mechanism has completed its working movement.

[0005] Furthermore, the main body also includes: Motion components are mounted on the top of the main body; The clamping assembly is mounted on the top of the main body.

[0006] Furthermore, the clamping mechanism includes two movable blocks mounted inside the clamping assembly, and also includes: Startup component, startup component installation settings are located inside the moving block; Anti-detachment component, which is installed on top of the start-up component; The pullback assembly is installed inside the moving block. The side wall of the movable block is fixedly connected with teeth.

[0007] Furthermore, the auxiliary mechanisms include: The recovery component is installed inside the anti-detachment component; Auxiliary components are installed on top of the anti-detachment components; The prevention component is installed on top of the moving block.

[0008] Furthermore, the motion component includes two motors fixedly connected inside the main body. The two motors are symmetrically distributed with the middle of the main body as the center. The output ends of the motors are fixedly connected to threaded rods, and the outer surfaces of the two threaded rods are threadedly connected to motion plates. An outer cover is slidably connected to the side wall of the moving plate on the outer surface of the threaded rod, and the bottom of the outer cover is fixedly connected to the top of the main body.

[0009] Furthermore, the clamping assembly includes two fixed bases disposed on the top of the main body, the two fixed bases being symmetrically arranged, the bottom fixed base being fixedly connected to the top of the main body, and the top fixed base being fixedly connected to the bottom of the motion plate; clamping blocks are fixedly connected to the side walls of the fixed bases. The left side of the clamping block is threaded with a clamping rod, and the gripping rod is slidably connected inside the clamping rod.

[0010] Furthermore, one of the moving blocks is rotatably connected to the clamping rod, and the other moving block is fixedly connected to the side wall of the clamping block; The starting component includes a starting slider that is slidably connected inside the moving block, and a number of return springs are fixedly connected to the top of the starting slider; The top of the starting slider is fixedly connected to four support blocks, which are arranged in pairs and symmetrically distributed around the center of the starting slider. The top of the support blocks is rotatably connected to a limiting rod. The middle part of the limiting rod is rotatably connected inside the moving block.

[0011] Furthermore, the anti-detachment component includes an anti-detachment block rotatably connected inside the movable block. The front and back of the anti-detachment block are rotatably connected to rotating shafts, which are rotatably connected inside the movable block. The rotating shafts and the anti-detachment block are eccentrically positioned. The anti-detachment block has two connecting grooves on its side wall, and a fixing rod is fixedly connected inside the connecting groove; The pullback assembly includes a pullback slider that is slidably connected inside the moving block, and two connecting rods are rotatably connected inside the pullback slider; The side of the connecting rod away from the pull-back slider is rotatably connected to the outer surface of the fixed rod; Several return springs are fixedly connected to the bottom of the pull-back slider, and the ends of the return springs away from the pull-back slider are fixedly connected to the moving block. The side wall of the pull-back slider is fixedly connected with tooth 2, and the length of tooth 2 on the pull-back slider is longer than that of tooth 1 on the moving block.

[0012] Furthermore, the restoration component is fixedly connected to the driving rod on the side of the connecting rod near the second tooth, and a sliding block is rotatably connected to the bottom of the driving rod; The bottom of the two sliding blocks is slidably connected to a recovery block; The bottom of the restoration block is fixedly connected to several reset springs, which are arranged at equal intervals. Tooth 3 is fixedly connected to the side of the restoration block near tooth 2, and the length of tooth 3 is the same as that of tooth 2.

[0013] Furthermore, the auxiliary component includes an auxiliary block inside the sliding connection start slider, and two reset springs are fixedly connected to the bottom of the auxiliary block. The two reset springs are symmetrically distributed with the middle of the auxiliary block as the center. A tooth four is fixedly connected to the side of the auxiliary block near tooth three, and tooth four is the same length as tooth three; The prevention component includes a trapezoidal block fixedly connected to the top of the movable block, the sidewalls of which are inclined. The trapezoidal block has two linkage rods on its side wall. The bottom of the two linkage rods is fixedly connected to the top of the pull-back slider, and crescent blocks are slidably connected to the outer surfaces of the two linkage rods.

[0014] The present invention has the following beneficial effects: 1. In this invention, when the cable moves upward, the recovery block and the anti-detachment block can make eccentric movements around the rotation axis. Due to the eccentric movement of the recovery block, the end of the recovery block away from the rotation axis can move a greater distance towards the cable. The simultaneous movement of the two recovery blocks on the outside of the cable will cause the cable to be subjected to a large compressive force. The cable provides traction, which causes the recovery block to move and provide compressive force to the cable. Since the recovery block moves eccentrically, the greater the traction force provided by the cable, the greater the compressive force provided by the recovery block on the cable, thereby limiting the cable from falling off and improving the stability and efficiency of cable testing.

[0015] 2. In this invention, when the fixed rod moves diagonally downward, it will drive the pull-back slider to move downward through the traction of the connecting rod. The pull-back slider is provided with two teeth. Since the second tooth is longer than the first tooth on the moving block, when the pull-back slider moves downward, the two pull-back sliders on the outside of the cable squeeze the cable and provide a downward pulling force to the cable through the downward movement of the pull-back slider, thereby reducing the loss of tension caused by the upward movement of the cable during testing and improving the accuracy of the test data of the cable during testing.

[0016] 3. In this invention, when the cable is straightened between the pull-back slider and the recovery block, the auxiliary block clamping part will cause the auxiliary blocks on both sides of the cable to move synchronously with the cable due to the downward movement of the cable. The auxiliary blocks will slide downward inside the starting slider, so that the cable returns to the state before the cable outer sheath fracture displacement, further increasing the stability and efficiency of the cable tensile test.

[0017] 4. In this invention, the crescent block will be subjected to a downward pulling force from the linkage rod. Since the side of the crescent block that connects with the trapezoidal block is also inclined, the inclined surface of the trapezoidal block will cause the crescent block to gradually move towards the cable along the inclined surface of the trapezoidal block when it moves downward under the pulling force of the linkage rod. The crescent blocks on both sides of the cable will simultaneously move closer to the cable until they are clamped, thus fixing the cable and preventing secondary movement of the cable during testing. This enhances the stability of the cable when it is clamped and improves the testing efficiency during cable testing.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the low-voltage cable tensile testing device of the present invention; Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the clamping component structure of the present invention; Figure 4 This is a schematic diagram of the moving block structure of the present invention; Figure 5 This is a partial cross-sectional schematic diagram of the clamping mechanism of the present invention; Figure 6 This is a schematic diagram of the moving block of the present invention; Figure 7 This is a schematic diagram of the anti-detachment component structure of the present invention; Figure 8 This is a partial cross-sectional schematic diagram of the pull-back assembly of the present invention; Figure 9 This is a partial cross-sectional schematic diagram of the restoration component of the present invention; Figure 10 This is a schematic diagram of the structure of the prevention component of the present invention; Figure 11 For the present invention Figure 9 A magnified view of part A in the image.

[0021] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Main body; 11. Motion component; 111. Motor; 112. Threaded rod; 113. Motion plate; 114. Outer cover; 12. Clamping component; 121. Fixed base; 122. Clamping block; 123. Clamping rod; 124. Grip rod; 2. Clamping mechanism; 201. Moving block; 21. Starting component; 211. Starting slider; 212. Return spring one; 213. Support block; 214. Limiting rod; 22. Anti-detachment component; 221. Anti-detachment block; 222. 1. Rotating shaft; 223. Connecting groove; 224. Fixing rod; 23. Pull-back assembly; 231. Pull-back slider; 232. Connecting rod; 233. Reset spring II; 3. Auxiliary mechanism; 31. Restoration assembly; 311. Driving rod; 312. Sliding block; 313. Restoration block; 314. Reset spring III; 32. Auxiliary assembly; 321. Reset spring IV; 322. Auxiliary block; 33. Prevention assembly; 331. Trapezoidal block; 332. Linkage rod; 333. Crescent block. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 - Figure 11 As shown, the present invention is a low-voltage cable tensile testing device, including a main body 1, and further comprising; Clamping mechanism 2 is installed on the top of the main body 1. When the equipment is to be used, clamping mechanism 2 is used to clamp the cable when testing the cable. Auxiliary mechanism 3 is installed inside clamping mechanism 2 to prevent the cable from falling off again after the clamping mechanism 2 has completed its working movement.

[0024] Entity 1 also includes: Motion component 11 is mounted on the top of the main body 1; Clamping assembly 12 is mounted on the top of the main body 1.

[0025] The clamping mechanism 2 includes two movable blocks 201 installed inside the clamping assembly 12, and also includes: Startup component 21 is installed inside the movable block 201; Anti-detachment component 22 is installed on top of the starting component 21; Pull-back assembly 23 is installed inside the movable block 201; The side wall of the movable block 201 is fixedly connected with a toothed connection.

[0026] Auxiliary mechanism 3 includes: The recovery component 31 is installed inside the anti-detachment component 22; Auxiliary component 32 is installed on top of anti-detachment component 22; Prevention component 33 is installed on top of the movable block 201.

[0027] The motion component 11 includes two motors 111 fixedly connected inside the main body 1. The two motors 111 are symmetrically distributed with the middle of the main body 1 as the center. The output end of the motors 111 is fixedly connected to a threaded rod 112. The outer surfaces of the two threaded rods 112 are threadedly connected to a motion plate 113. An outer cover 114 is slidably connected to the side wall of the moving plate 113 on the outer surface of the threaded rod 112. The bottom of the outer cover 114 is fixedly connected to the top of the main body 1. The moving plate 113 has threads inside, so that when the threaded rod 112 rotates, it drives the moving plate 113 to move up and down. When the moving plate 113 moves upward, the moving plate 113 moves synchronously with the clamping assembly 12 connected to the bottom, thereby generating an upward pulling force on the cable. A tensile tester is set at the bottom of the fixed base 121. When the cable is subjected to tensile force, the tensile performance and maximum bearing capacity of the cable are tested, thereby completing the purpose of tensile testing of the cable.

[0028] The clamping assembly 12 includes two fixed bases 121 disposed on the top of the main body 1. The two fixed bases 121 are symmetrically arranged. The bottom fixed base 121 is fixedly connected to the top of the main body 1, and the top fixed base 121 is fixedly connected to the bottom of the moving plate 113. A clamping block 122 is fixedly connected to the side wall of the fixed base 121. A clamping rod 123 is threadedly connected to the left side of the clamping block 122. A gripping rod 124 is slidably connected inside the clamping rod 123. Rotating the gripping rod 124 causes the clamping rod 123 to rotate. The rotation of the clamping rod 123 causes the movable block 201 connected to it to slide. The movement of the movable block 201 causes the cable to be squeezed by the outer movable block 201, thereby fixing the cable.

[0029] One of the movable blocks 201 is rotatably connected to the clamping rod 123, and the other movable block 201 is fixedly connected to the side wall of the clamping block 122; The starting component 21 includes a starting slider 211 that is slidably connected inside the moving block 201, and a plurality of return springs 212 are fixedly connected to the top of the starting slider 211. The top of the starting slider 211 is fixedly connected to four support blocks 213. The four support blocks 213 are arranged in pairs and symmetrically distributed with the middle of the starting slider 211 as the center. The top of the support blocks 213 is rotatably connected to a limiting rod 214. The middle part of the limiting rod 214 is rotatably connected to the inside of the moving block 201. When the cable moves inside the moving block 201, the starting slider 211 and its outer auxiliary block 322 inside the moving block 201 are moved by the cable, causing the starting slider 211, the auxiliary block 322 and the cable to move synchronously. This causes the four support blocks 213 at the top of the starting slider 211 to move upward, which drives the limiting rod 214 connected to the top of the support block 213 to rotate around its own central fixed axis.

[0030] The anti-detachment component 22 includes an anti-detachment block 221 rotatably connected inside the movable block 201. The front and back sides of the anti-detachment block 221 are rotatably connected to a rotating shaft 222, which is rotatably connected inside the movable block 201. The rotating shaft 222 and the anti-detachment block 221 are eccentrically arranged. The anti-detachment block 221 has two connecting grooves 223 on its side wall, and a fixing rod 224 is fixedly connected inside the connecting groove 223; The pullback assembly 23 includes a pullback slider 231 that is slidably connected inside the moving block 201, and two connecting rods 232 are rotatably connected inside the pullback slider 231; The side of the connecting rod 232 away from the pull-back slider 231 is rotatably connected to the outer surface of the fixed rod 224; Several return springs 233 are fixedly connected to the bottom of the pull-back slider 231, and the ends of the return springs 233 away from the pull-back slider 231 are fixedly connected to the moving block 201. The side wall of the pull-back slider 231 is fixedly connected with a second tooth. The second tooth on the pull-back slider 231 is longer than the first tooth on the moving block 201. Since the second tooth is longer than the first tooth on the moving block 201, when the pull-back slider 231 moves downward, the two pull-back sliders 231 on the outside of the cable squeeze the cable and provide a downward pulling force to the cable through the downward movement of the pull-back slider 231. This reduces the loss of pulling force caused by the upward movement of the cable during the test and improves the accuracy of the test data of the cable during the test.

[0031] The restoration component 31 is fixedly connected to the driving rod 311 on the side of the connecting rod 232 near the second tooth, and the bottom of the driving rod 311 is rotatably connected to the sliding block 312; The bottom of the two sliding blocks 312 is slidably connected to the restoring block 313; The bottom of the restoration block 313 is fixedly connected with several reset springs 314, which are arranged at equal intervals. The side of the restoration block 313 closest to the tooth 2 is fixedly connected to the tooth 3. The length of the tooth 3 is the same as that of the tooth 2. Due to the eccentric movement of the restoration block 313, the end of the restoration block 313 away from the rotating shaft 222 can move a greater distance toward the cable. The simultaneous movement of the two restoration blocks 313 on the outside of the cable will cause the cable to be subjected to a large compressive force. The cable provides traction, which causes the restoration blocks 313 to move and provide compressive force to the cable.

[0032] The auxiliary component 32 includes an auxiliary block 322 that is slidably connected to the inside of the start slider 211. Two reset springs 321 are fixedly connected to the bottom of the auxiliary block 322. The two reset springs 321 are symmetrically distributed with the middle of the auxiliary block 322 as the center. A tooth four is fixedly connected to the side of auxiliary block 322 near tooth three, and tooth four is the same length as tooth three; The prevention component 33 includes a trapezoidal block 331 fixedly connected to the top of the movable block 201, and the sidewall of the trapezoidal block 331 is inclined. The trapezoidal block 331 has two linkage rods 332 on its side wall. The bottom of the two linkage rods 332 is fixedly connected to the top of the pull-back slider 231. The outer surfaces of the two linkage rods 332 are slidably connected to crescent blocks 333. The crescent blocks 333 on both sides of the cable move closer to the cable until they are clamped, so that the cable is fixed to prevent the cable from moving again during the test. This enhances the stability of the cable when it is clamped and improves the detection efficiency of the cable.

[0033] In use, the operator first places both ends of the cable between the two moving blocks 201 in the two sets of clamping components 12. Then, the operator rotates the gripping rod 124 to make the clamping rod 123 rotate. The rotation of the clamping rod 123 causes the moving block 201 connected to it to slide. The movement of the moving block 201 causes the cable to be squeezed by the outer moving block 201, thus fixing the cable. Then, the operator installs the tension sensor at the bottom of the two fixed bases 121. At this time, the two motors are started by the start / stop button, so that the motor drives the threaded rod 112 to rotate through the transmission shaft. The moving plate 113 has threads inside, so that when the threaded rod 112 rotates, it drives the moving plate 113 to move up and down. When the moving plate 113 moves upward, the moving plate 113 moves synchronously with the clamping components 12 connected to the bottom, thereby generating an upward tension on the cable. A tension tester is set at the bottom of the fixed base 121. When the cable is subjected to tension, the tensile performance and maximum bearing capacity of the cable are detected, thus completing the purpose of the cable tensile test.

[0034] When the moving block 201 approaches the cable and applies pressure, the cable is subjected to opposing thrusts from the two outer moving blocks 201, forming a squeezing force that clamps the cable. When the tension on the cable clamped between the two moving blocks 201 is too great, the outer sheath of the cable in contact with the recovery block 313 may break, causing the cable to move in the direction of the tension. When the cable moves within the moving block 201, the starting slider 211 and its outer auxiliary block 322, which are located inside the moving block 201, are moved synchronously by the cable movement. This causes the four support blocks 213 at the top of the starting slider 211 to move upward, which in turn causes the limiting rod 214 connected to the top of the support block 213 to rotate around its central fixed axis. This causes the end of the limiting rod 214 away from the support block 213 to move downward, causing a portion of the limiting rod 214 embedded inside the anti-detachment block 221 to detach from the anti-detachment block 221. Due to the rotation shaft 222 being set... Inside the moving block 201, the anti-detachment block 221 can rotate eccentrically around the rotating shaft 222 when it rotates. When the anti-detachment block 221 rotates, it will drive the outer recovery block 313 to move synchronously. Since the recovery block 313 is provided with teeth and the separation of the limiting rod 214 can make the teeth on the recovery block 313 subject to the upward traction force of the cable. When the cable moves upward, the recovery block 313 and the anti-detachment block 221 can move eccentrically around the rotating shaft 222. Due to the eccentric movement of the recovery block 313, the end of the recovery block 313 away from the rotating shaft 222 can move a greater distance towards the cable. The simultaneous movement of the two recovery blocks 313 on the outside of the cable will make the cable subject to a large compressive force. The cable provides traction, which causes the recovery block 313 to move and provide compressive force to the cable. Since the recovery block 313 moves eccentrically, the greater the traction force provided by the cable, the greater the compressive force provided by the recovery block 313 to the cable, thereby limiting the cable from falling off and improving the stability and efficiency of cable testing.

[0035] When the cable moves within the starting assembly 21, the anti-detachment block 221 moves eccentrically around the rotating shaft 222. The fixing rod 224 inside the anti-detachment block 221 moves synchronously with the anti-detachment block 221. When the fixing rod 224 moves, the connecting rod 232 connected to the fixing rod 224 also moves with it. Since the anti-detachment block 221 moves eccentrically around the rotating shaft 222, the movement trajectory of the fixing rod 224 is opposite to the direction of the tension and moves obliquely downward. When the fixing rod 224 moves obliquely downward, it will drive the pull-back slider 231 to move downward through the traction of the connecting rod 232. The pull-back slider 231 is provided with teeth two. Since teeth two is longer than teeth one on the moving block 201, when the pull-back slider 231 moves downward, the two pull-back sliders 231 on the outside of the cable squeeze the cable and provide a downward tension to the cable through the downward movement of the pull-back slider 231, thereby reducing the tension loss caused by the upward movement of the cable during testing and improving the accuracy of the test data of the cable during testing.

[0036] Because the pull-back slider 231 pulls the cable located inside the two moving blocks 201 downwards, when the cable is pulled downwards by the pull-back slider 231, the connecting rod 232 moves synchronously with the pull-back slider 231. When the pull-back slider 231 moves, it drives the rod 311 to move synchronously with it. Since the fixed rod 224 moves diagonally downwards, the connecting rod 232 will move closer to the anti-detachment block 221 according to the diagonal downward movement of the fixed rod 224. Also, because the anti-detachment block 221 is making eccentric movements, the end away from the rotating shaft 222 will make circular motion with the rotating shaft 222 as the center. Therefore, when the anti-detachment block 221 moves, it will cause the driving rod 311 to move downwards inside the anti-detachment block 221. When the driving rod 311 moves downwards inside the anti-detachment block 221, the driving rod 311 will drive the cable to move downwards. The sliding block 312 slides within the groove inside the recovery block 313, causing the recovery block 313 to move downwards as it moves. The cable pulled back by the pullback slider 231 is moved downwards by the two recovery blocks 313 on the outside of the cable, moving synchronously with the recovery block 313. This allows the cable pulled back by the pullback slider 231 to be straightened between the two recovery blocks 313. Once the cable between the pullback slider 231 and the recovery block 313 is straightened, the clamping part of the auxiliary block 322 will move synchronously with the cable due to the downward movement of the cable. The auxiliary blocks 322 will slide downwards inside the starting slider 211, restoring the cable to its state before the cable's outer sheath fracture displacement, further increasing the stability and efficiency of the cable tensile test.

[0037] Since the outer side of the trapezoidal block 331 is an inclined surface, when the linkage rod 332 moves synchronously with the pull-back slider 231 below, the crescent block 333 will be pulled downward by the linkage rod 332. Since the side of the crescent block 333 that connects with the trapezoidal block 331 is also an inclined surface, the inclined surface of the trapezoidal block 331 will cause the crescent block 333 to move downward by the pull of the linkage rod 332 and gradually move towards the cable along the inclined surface of the trapezoidal block 331. The crescent blocks 333 on both sides of the cable move closer to the cable until they are clamped, thus fixing the cable and preventing secondary movement of the cable during testing. This enhances the stability of the cable when it is clamped and improves the testing efficiency of the cable.

[0038] When the cable tensile test is completed and the cable is removed from the clamping assembly 12, the tension on the internal parts of the clamping mechanism 2 and the auxiliary mechanism 3 disappears. The second return spring 233 located below the pull-back slider 231 restores its elasticity and pushes the pull-back slider 231 back to its original position. The pull-back slider 231 drives the anti-detachment block 221 to move upward through the connecting rod 232, causing the anti-detachment block 221 to return to its original position. The first return spring 212 pushes the starting slider 211 downward. When the starting slider 211 moves downward, the support block 213 moves synchronously with it. The limiting rod 214 at the top of the support block 213, through its fixed shaft in the middle, causes the side of the limiting rod 214 near the anti-detachment block 221 to re-embed into the anti-detachment block 221, preventing the anti-detachment block 221 from moving again, thus facilitating the next test of the cable.

[0039] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-voltage cable tensile testing device, comprising a main body (1), characterized in that, Also includes; Clamping mechanism (2), which is installed on the top of the main body (1), is used to clamp the cable when the device is to be used; The auxiliary mechanism (3) is installed inside the clamping mechanism (2) to prevent the cable from falling off again after the clamping mechanism (2) has finished its working movement.

2. The low-voltage cable tensile testing device according to claim 1, characterized in that: The main body (1) also includes: A motion component (11) is mounted on the top of the main body (1); A clamping assembly (12) is mounted on the top of the main body (1).

3. The low-voltage cable tensile testing device according to claim 2, characterized in that: The clamping mechanism (2) includes two movable blocks (201) installed inside the clamping assembly (12), and also includes: A startup component (21) is installed inside the movable block (201); Anti-detachment component (22), which is installed on top of the starting component (21); A pullback assembly (23) is installed inside the movable block (201); The side wall of the movable block (201) is fixedly connected with a tooth.

4. The low-voltage cable tensile testing device according to claim 3, characterized in that: The auxiliary mechanism (3) includes: The recovery component (31) is installed inside the anti-detachment component (22); An auxiliary component (32) is mounted on top of the anti-detachment component (22); A prevention component (33) is mounted on top of the movable block (201).

5. The low-voltage cable tensile testing device according to claim 4, characterized in that: The motion component (11) includes two motors (111) fixedly connected inside the main body (1). The two motors (111) are symmetrically distributed with the middle part of the main body (1) as the center. The output end of the motors (111) is fixedly connected to a threaded rod (112). The outer surfaces of the two threaded rods (112) are threadedly connected to a motion plate (113). An outer cover (114) is slidably connected to the side wall of the moving plate (113) located on the outer surface of the threaded rod (112), and the bottom of the outer cover (114) is fixedly connected to the top of the main body (1).

6. The low-voltage cable tensile testing device according to claim 5, characterized in that: The clamping assembly (12) includes two fixed bases (121) disposed on the top of the main body (1). The two fixed bases (121) are symmetrically arranged. The bottom fixed base (121) is fixedly connected to the top of the main body (1), and the top fixed base (121) is fixedly connected to the bottom of the moving plate (113). A clamping block (122) is fixedly connected to the side wall of the fixed base (121). The clamping block (122) is threadedly connected to a clamping rod (123) on its left side, and a gripping rod (124) is slidably connected inside the clamping rod (123).

7. The low-voltage cable tensile testing device according to claim 6, characterized in that: One of the movable blocks (201) is rotatably connected to the clamping rod (123), and the other movable block (201) is fixedly connected to the side wall of the clamping block (122); The starting component (21) includes a starting slider (211) slidably connected inside the moving block (201), and a plurality of return springs (212) are fixedly connected to the top of the starting slider (211). The top of the starting slider (211) is fixedly connected to four support blocks (213). The four support blocks (213) are arranged in pairs and symmetrically distributed with the middle of the starting slider (211) as the center. The top of the support blocks (213) is rotatably connected to a limiting rod (214). The middle part of the limiting rod (214) is rotatably connected to the inside of the moving block (201).

8. The low-voltage cable tensile testing device according to claim 7, characterized in that: The anti-detachment component (22) includes an anti-detachment block (221) rotatably connected inside the movable block (201). The anti-detachment block (221) has a rotating shaft (222) rotatably connected to both its front and back sides. The rotating shaft (222) is rotatably connected inside the movable block (201), and the rotating shaft (222) and the anti-detachment block (221) are eccentrically positioned. The anti-detachment block (221) has two connecting grooves (223) on its side wall, and a fixing rod (224) is fixedly connected inside the connecting groove (223). The pullback assembly (23) includes a pullback slider (231) slidably connected inside the movable block (201), and two connecting rods (232) are rotatably connected inside the pullback slider (231). The connecting rod (232) is rotatably connected to the outer surface of the fixed rod (224) on the side away from the pull-back slider (231); The bottom of the pull-back slider (231) is fixedly connected to a plurality of reset springs (233), and the ends of the plurality of reset springs (233) away from the pull-back slider (231) are fixedly connected to the moving block (201); The side wall of the pull-back slider (231) is fixedly connected with a second tooth, and the second tooth on the pull-back slider (231) is longer than the first tooth on the moving block (201).

9. A low-voltage cable tensile testing device according to claim 8, characterized in that: The restoration component (31) is fixedly connected to the driving rod (311) on the side of the connecting rod (232) near the second tooth, and the bottom of the driving rod (311) is rotatably connected to the sliding block (312). The bottom of the two sliding blocks (312) are slidably connected to a restoration block (313); The bottom of the restoration block (313) is fixedly connected to a plurality of reset springs (314), and the plurality of reset springs (314) are arranged at equal distances. The restoration block (313) has a tooth three fixedly connected to the side of the tooth two, and the length of the tooth three is the same as that of the tooth two.

10. A low-voltage cable tensile testing device according to claim 9, characterized in that: The auxiliary component (32) includes an auxiliary block (322) inside the sliding connection start slider (211). The bottom of the auxiliary block (322) is fixedly connected to two reset springs (321), which are symmetrically distributed with the middle of the auxiliary block (322) as the center. The auxiliary block (322) is fixedly connected to a fourth tooth on the side near the third tooth, and the fourth tooth is equal in length to the third tooth; The prevention component (33) includes a trapezoidal block (331) fixedly connected to the top of the movable block (201), the sidewall of the trapezoidal block (331) being inclined. The trapezoidal block (331) has two linkage rods (332) on its side wall. The bottom of the two linkage rods (332) is fixedly connected to the top of the pull-back slider (231). The outer surfaces of the two linkage rods (332) are slidably connected to crescent blocks (333).

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