Detection device for testing voltage resistance of cable

Abstract

The invention relates to the technical field of cable detection, and belongs to a detection device for testing the voltage resistance of a cable. Comprising a detection table, the detection table is fixedly connected with a fixed support, the fixed support is slidably connected with a sliding support, the fixed support is fixedly connected with a hydraulic push rod, the telescopic end of the hydraulic push rod is fixedly connected with a pressing block, the pressing block is located above the fixed support, the detection table is provided with a tooth-missing ring, and the tooth-missing ring is provided with a tooth-missing groove. The tooth-missing ring is fixedly connected with two connecting plates which are symmetrically distributed, and the two connecting plates are jointly and rotationally connected with a swing support. According to the invention, the state of the cable under composite mechanical stress is simulated by using the swing of the swing support in two directions and the extrusion of the pressure block on the cable, and the result obtained by carrying out a voltage withstanding test on the cable under the state can reflect the insulation performance evolution of the cable under the action of dynamic mechanical stress. Therefore, reference value and data with high reliability are provided for development of novel cables applied to joints of industrial robots.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to a detection device for testing the voltage resistance performance of a cable. Background Art

[0002] The withstand voltage test simulates the overvoltage conditions that the cable may encounter in actual operation by applying a test voltage much higher than the rated working voltage of the cable for a certain period of time. The purpose is to actively expose potential defects in the cable insulation. These defects may be caused by the manufacturing process (such as impurities, air gaps, uneven insulation thickness), or damage caused by transportation, laying, and installation (such as damage to the outer sheath causing moisture in the insulation, mechanical damage). If the insulation is broken down or flashed under the test voltage, it means that its insulation strength is not enough to withstand the possible overvoltage. The cable is no longer used, thus avoiding catastrophic failure of the cable after it is put into operation.

[0003] However, during the actual use of the cable, deformation caused by external forces such as torsion and extrusion will cause fatigue, microcracks, deformation and even local damage to the insulation material. These damages caused by mechanical stress will significantly reduce the actual insulation strength of the cable, thereby causing unexpected cable failures. In particular, cables used in robot joints will be subjected to the combined forces of bending, torsion and extrusion during use, which will cause their actual insulation strength to be significantly reduced. The existing standard withstand voltage test is only conducted when the cable is in a static state and not subjected to operating stress (such as leaving the factory, after laying and installation, and before commissioning). The test results mainly reflect the insulation integrity of the cable in the "initial static state", and cannot evaluate the evolution of its insulation performance under dynamic mechanical stress. For the development of new cables for use in harsh dynamic environments such as industrial robot joints, relying solely on standard withstand voltage test data for design and verification has poor reference value and reliability. Summary of the Invention

[0004] The present invention provides a detection device for testing the withstand voltage performance of a cable, so as to overcome the shortcomings of poor reference value and reliability of data provided by the existing standard withstand voltage test for cables for the development of new cables.

[0005] The technical solution is: a detection device for testing the pressure resistance performance of a cable, comprising: a detection platform, the detection platform is fixedly connected to a fixed support, the fixed support is slidably connected to a sliding support, the fixed support is fixedly connected to a hydraulic push rod, the telescopic end of the hydraulic push rod is fixedly connected to a pressure block, and the pressure block is located above the fixed support. The detection platform is provided with a toothed ring, the toothed ring is fixedly connected to two symmetrically distributed connecting plates, and the two connecting plates are jointly rotatably connected to a swing support, the swing support is located on a side of the sliding support away from the fixed support, the fixed support, the sliding support and the upper side of the swing support are jointly used to place the cable to be tested, the rotation axis of the toothed ring is perpendicular to the rotation axis of the swing support, so that the swing support can swing in two directions, a high voltage generator is provided on the detection platform, and a power component for driving the toothed ring and the swing support to rotate is provided on the detection platform.

[0006] Furthermore, the sliding support is in contact with the swing support, and a spring is fixedly connected between the fixed support and the sliding support, and the spring is used to maintain the contact state between the sliding support and the swing support.

[0007] Furthermore, the power assembly includes: two rollers, a torsion motor, a first gear, a missing gear, a bending motor and a second gear, the roller is rotatably connected to the detection platform, the outer peripheral side of the missing gear ring is provided with an arc groove, the roller slides in the arc groove, the torsion motor is fixed to the detection platform, the first gear is fixed to the output shaft of the torsion motor and meshes with the missing gear ring, the first gear and the roller are respectively located on the inner and outer sides of the missing gear ring and limit the missing gear ring, the missing gear is fixed to the swing support, the rotation axis of the missing gear is collinear with the rotation axis of the swing support, the bending motor is fixed to the missing gear ring, and the second gear is fixed to the output shaft of the bending motor and meshes with the missing gear.

[0008] Furthermore, the rotation axis of the toothless ring intersects with the rotation axis of the swing support, and the intersection of the two is located on the upper side of the swing support.

[0009] Furthermore, it also includes: a flexible fixing component arranged on a side of the swing support away from the fixed support and used to provide fixation for the free end of the cable; the flexible fixing component includes: two symmetrically distributed mounting brackets, an adjusting screw and a plurality of fastening straps, the mounting bracket is slidingly connected to the swing support, the mounting bracket is threadedly connected to the adjusting screw, the number of the fastening straps is even and is divided into two groups, and the two groups of the fastening straps are in opposite directions and staggered, all the fastening straps in the same group of the fastening straps are equally spaced, and both ends of the fastening straps are fixed to adjacent mounting brackets.

[0010] Furthermore, a rubber layer is provided on the inner side of the fastening belt.

[0011] Furthermore, in the vertical direction, the distance between the two ends of the fastening belt is smaller than the maximum distance between the upper and lower sides thereof.

[0012] Furthermore, all the fastening straps in the same group of the fastening straps are fixedly connected to a supporting member, and the supporting member is slidably connected to the adjacent mounting brackets.

[0013] Furthermore, it also includes: a rotation-limiting fixing assembly arranged on a side of the fixed support away from the swing support and used to provide a fixed terminal of the cable; the rotation-limiting fixing assembly includes: two symmetrically distributed mounting rings, a plurality of fastening rods, a flexible sleeve and a fastening motor, the two mounting rings are rotatably connected to the fixed support, all the fastening rods are divided into two groups, the two groups of fastening rods are respectively fixed to the opposite sides of the two mounting rings, the two groups of fastening rods are staggered, the flexible sleeve is arranged on all the fastening rods, the flexible sleeve is provided with an annularly distributed accommodating portion and an annularly distributed wrapping portion, the number of the fastening rods in a group is the same as the number of the accommodating portion and the wrapping portion, three the accommodating portions and three the wrapping portions are staggered, the three fastening rods in the same group are respectively located in the three wrapping portions, the fastening motor is fixed to the fixed support, the two mounting rings and the output shaft of the fastening motor are driven by a bevel gear set to make the two mounting rings rotate in opposite directions.

[0014] Furthermore, it also includes: a regulating component arranged on the swing support and used to adjust the bending amplitude of the cable; the regulating component includes: a mounting member, a connecting rod, a limiting plate and an extrusion block, the mounting member is rotatably connected to the swing support, and a torsion spring is fixed between the mounting member and the swing support, the connecting rod is slidably connected to the mounting member, the side of the connecting rod away from the mounting member is fixed to the limiting plate, the limiting plate is in contact with the swing support, and the contact surfaces of the above two are both provided with equidistantly distributed limiting teeth, the limiting teeth are used to limit the limiting plate, the extrusion block is fixed to the limiting plate, and the extrusion block is used to fix the cable.

[0015] Compared with the existing technology, the present invention has the following advantages: the present invention utilizes the swing of the swing support in two directions and the squeezing of the cable by the pressure block to simulate the state of the cable under composite mechanical stress. The result of the voltage withstand test on the cable under this state can reflect the evolution of the insulation performance of the cable under dynamic mechanical stress, thereby providing reference value and highly reliable data for the development of new cables used in the joints of industrial robots.

[0016] By maintaining the intersection of the rotation axes of the swing support in two directions on the upper side of the swing support, the total length of the two fixed points of the cable on the fixed support and the upper side of the swing support remains unchanged, preventing the swing of the swing support from causing additional tensile or compressive stress on the cable, and maintaining the reliability of the test results.

[0017] The cable is fixed with a flexible fastening belt so that the extrusion force of the fastening belt on the cable is consistent, which reduces the probability of stress concentration at the cable fixing position, thereby reducing the probability of deformation at the cable fixing position and reducing the impact on the cable insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the fixed support and the swing support of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the missing gear ring and the missing gear of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the swing support and the missing gear of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the mounting bracket and the adjusting screw of the present invention; Figure 6 An exploded view of the mounting bracket, fastening strap and support member of the present invention; Figure 7 This is a sectional view of the three-dimensional structure of the fixed support and the flexible sleeve of the present invention; Figure 8 An exploded view of the mounting ring, the fastening rod and the flexible sleeve of the present invention; Figure 9 It is a schematic diagram of the three-dimensional structure of the fastening belt and the mounting piece of the present invention.

[0019] The markings of the components in the accompanying drawings are as follows: 1-testing table, 2-fixed support, 3-sliding support, 4-hydraulic push rod, 5-pressure block, 6-missing gear ring, 601-arc groove, 7-connecting plate, 8-swing support, 9-roller, 10-torsion motor, 11-first gear, 12-missing gear, 13-bending motor, 14-second gear, 15-mounting frame, 16-adjusting screw, 17-fastening belt, 18-support member, 19-mounting ring, 20-fastening rod, 21-flexible sleeve, 211-accommodating portion, 212-wrapping portion, 22-fastening motor, 23-mounting member, 24-connecting rod, 25-limiting plate, 251-limiting tooth, 26-extrusion block. DETAILED DESCRIPTION

[0020] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings.

[0021] Example 1

[0022] This embodiment provides a detection device for testing the voltage withstand performance of a cable to simulate the state of the cable during actual operation, and conducts a voltage withstand test on this basis, providing reference value and highly reliable data for the development of new cables.

[0023] See also Figures 1 to 4 , a detection device for testing the pressure resistance performance of cables, comprising: a detection platform 1, the detection platform 1 is fixedly connected to a fixed support 2, the left side of the fixed support 2 is slidably connected to a sliding support 3, the fixed support 2 is fixedly connected to a hydraulic push rod 4 through a bracket, the telescopic end of the hydraulic push rod 4 is fixedly connected to a pressure block 5, the pressure block 5 is located above the fixed support 2, and the pressure block 5 is used to squeeze the cable to apply an extrusion force to the cable; the detection platform 1 is provided with a toothed ring 6, the toothed ring 6 is fixedly connected to two symmetrically distributed connecting plates 7, the two connecting plates 7 are connected to a swing support 8 that rotates together, and the swing support 8 is located at the sliding end. The left side of the support 3 is in contact with the sliding support 3, and the upper sides of the fixed support 2, the sliding support 3 and the swing support 8 are jointly used to place the cable to be tested. The rotation axis of the toothed ring 6 is perpendicular to the rotation axis of the swing support 8, so that the swing support 8 can swing in two directions. A high-voltage generator is provided on the test platform 1, and the output end of the high-voltage generator is electrically connected to the right end of the battery cell to be tested in the cable, the left end of the battery cell to be tested is suspended, and the remaining battery cells in the cable are all in a grounded state; a power component for driving the toothed ring 6 and the swing support 8 to rotate is provided on the test platform 1.

[0024] The above arrangement can simulate the state of the cable under composite mechanical stress by utilizing the swing of the swing support 8 in two directions and the squeezing of the cable by the pressure block 5. The result of the voltage withstand test on the cable under this state can reflect the evolution of the insulation performance of the cable under dynamic mechanical stress, thereby providing reference value and highly reliable data for the development of new cables used in the joints of industrial robots.

[0025] It should be noted that the bolts in this article are for illustration only and the threads thereon are not specifically shown; in this embodiment, the two ends of the cable are fixed to the fixed support 2 and the swing support 8 respectively by existing fixing methods (such as cable clamps, cable ties, clamps, etc.).

[0026] See also Figure 4A spring that always stores force is fixedly connected between the fixed support 2 and the sliding support 3. The spring is used to maintain the contact state between the sliding support 3 and the swing support 8, preventing the middle part of the cable from being suspended in the air, providing sufficient support for the middle part of the cable, and allowing the cable to deform according to its own laws, thereby improving the reliability and reference value of the test results.

[0027] See also Figures 2 to 4 The power assembly includes: two rollers 9, a twisting motor 10, a first gear 11, a missing gear 12, a bending motor 13 and a second gear 14, (see Figure 3 ) A bracket is provided on the detection platform 1, and two rollers 9 are rotatably connected to the bracket on the detection platform 1. An arc groove 601 is provided on the outer circumference of the missing tooth ring 6. The rollers 9 slide in the arc groove 601, and the length of the rollers 9 is equal to the width of the arc groove 601 in the left and right directions, limiting the axial movement of the missing tooth ring 6; the torsion motor 10 is fixed to the detection platform 1 through the bracket, and the first gear 11 is fixed to the output shaft of the torsion motor 10 and meshes with the missing tooth ring 6. The first gear 11 and the rollers 9 are respectively located inside the missing tooth ring 6. The outer two sides limit the missing gear ring 6, and the first gear 11 and the two rollers 9 jointly provide three-point support for the missing gear ring 6; the missing gear 12 is fixed to the right part of the lower side of the swing support 8, and the rotation axis of the missing gear 12 is collinear with the rotation axis of the swing support 8. The bending motor 13 is fixed to the missing gear ring 6 through the bracket, and the second gear 14 is fixed to the output shaft of the bending motor 13 and meshes with the missing gear 12; the rotation axis of the missing gear ring 6 intersects with the rotation axis of the swing support 8 and the intersection of the two is located on the upper side of the swing support 8.

[0028] The above arrangement can be achieved by maintaining the intersection of the rotation axes of the swing support 8 in two directions on the upper side of the swing support 8, so that the total length of the two fixed points of the cable on the fixed support 2 and the upper side of the swing support 8 remains unchanged, thereby preventing the swing of the swing support 8 from causing additional tensile or compressive stress on the cable and maintaining the reliability of the test results.

[0029] The process after adopting the above settings is: pass the cable to be tested through the bracket for installing the hydraulic push rod 4 and place it in the middle of the upper side of the fixed support 2, the sliding support 3 and the swing support 8, respectively fix the left and right ends of the cable on the swing support 8 and the fixed support 2, and keep the cable in a straight state; electrically connect the output end of the high-voltage generator to the right end of the battery cell to be tested in the cable, and ground the remaining battery cells in the cable. Then, set the swing angle of the swing support 8 in two directions and the squeezing force of the pressure block 5 on the cable according to the moving state of the industrial robot joint.

[0030] Start the high-voltage generator, turn on the bending motor 13 and the torsion motor 10, the output shaft of the bending motor 13 drives the left end of the swing support 8 to swing upward through the second gear 14 and the missing gear 12, the output shaft of the torsion motor 10 drives the missing gear ring 6 to rotate through the first gear 11, and the missing gear ring 6 drives the left end of the swing support 8 to swing forward through the connecting plate 7. During the swing support 8 swinging in two directions at the same time, an angle is formed between the swing support 8 and the sliding support 3, and the cable is bent and twisted under the influence of its own structure. After the swing support 8 swings to the set angle, the bending motor 13 and the torsion motor 10 both rotate in the opposite direction until the swing support 8 is reset and drives the cable thereon to restore its shape.

[0031] Turn on the hydraulic push rod 4, the telescopic end of the hydraulic push rod 4 extends and drives the pressure block 5 to move downward, so that the pressure block 5 contacts the cable and applies a downward extrusion force to the cable until the extrusion force on the cable reaches the set value. The telescopic end of the hydraulic push rod 4 contracts and drives the pressure block 5 to move upward, so that the pressure block 5 releases the extrusion of the cable; the hydraulic push rod 4, the torsion motor 10 and the bending motor 13 are all started until they are finally reset and recorded as a cycle. The opening and closing order of the hydraulic push rod 4, the torsion motor 10 and the bending motor 13 is determined according to the action order of the industrial robot joints.

[0032] Repeat the above steps of bending, twisting and squeezing the cable until the cable has insulation breakdown or flashover. At this time, stop the high-voltage generator, hydraulic push rod 4, torsion motor 10 and bending motor 13, and record the number of cycles of the hydraulic push rod 4, torsion motor 10 and bending motor 13. Then, release the fixation of both ends of the cable, replace the remaining cables and re-test to evaluate the pressure resistance performance of cables of different types or materials when used in the joints of industrial robots. This test data can be used as a reference for the development of new cables with higher reference value and reliability.

[0033] Example 2

[0034] This embodiment is based on the first embodiment and aims to provide a new cable fixing method to address the problem of local stress concentration in the cable caused by the traditional cable fixing method and reduce the impact of the fixing method on the insulation performance of the cable.

[0035] See also Figure 2 、 Figure 5 、 Figure 6 and Figure 9, also includes: a flexible fixing component arranged on the left side of the swing support 8 and used to fix the free end of the cable, the flexible fixing component includes: two symmetrically distributed mounting brackets 15, an adjusting screw 16 and six tightening straps 17, the material of the tightening strap 17 has the characteristics of low yield strength, low bending strength and high tensile strength, so that after the tightening strap 17 is bent and fitted around the cable, the elastic force accumulated by the tightening strap 17 itself due to deformation is small, thereby making the extrusion force provided to the cable by each position where the tightening strap 17 fits the cable tend to be consistent, and low carbon steel that has been annealed is used here; the two mounting brackets 15 are respectively slidably connected to the front and rear sides of the swing support 8, and the adjusting screw 16 is provided with two symmetrically distributed sets of threads, and the two mounting brackets 15 are respectively threadedly connected to the adjusting screw 16 through the two sets of threads on the adjusting screw 16, and the spacing between the two mounting brackets 15 is controlled to become larger or smaller by adjusting the screw 16; the number of tightening straps 17 The width of a single tightening band 17 in the left and right directions can be determined according to the roughness of the cable surface and the hardness of the cable. If the cable surface is smooth, the number of tightening bands 17 should be appropriately increased. Vice versa, if the cable hardness is small, the width of the tightening band 17 in the left and right directions should be reduced to make the force on the contact position between the tightening band 17 and the cable more uniform; the tightening bands 17 are divided into two groups, and the two groups of tightening bands 17 are in opposite directions and staggered, so that the two adjacent tightening bands 17 provide opposite extrusion pressure for the cable; all the tightening bands 17 in the same group of tightening bands 17 are distributed at equal intervals, and the mounting frame 15 is provided with two pressure plates symmetrically distributed up and down, and the mounting frame 15 is fixed to the two ends of the tightening band 17 through the two pressure plates thereon; a rubber layer is provided on the inner side of the tightening band 17 to increase the friction coefficient between the tightening band 17 and the cable, thereby increasing the friction between the tightening band 17 and the cable, and improving the stability of the cable during bending.

[0036] The above arrangement enables the cable to be fixed using the flexible fastening belt 17, so that the squeezing force of the fastening belt 17 on the cable tends to be consistent, thereby reducing the probability of stress concentration at the cable fixing position, thereby reducing the probability of deformation at the cable fixing position and reducing the impact on the insulation performance of the cable.

[0037] See also Figure 5 and Figure 6 All the fastening belts 17 in the same group of fastening belts 17 are fixed with a support member 18, and the support member 18 is slidably connected to the adjacent mounting frame 15. The deformation force of the fastening belt 17 is greater than the sliding force of the support member 18 in the mounting frame 15. Under the premise that the support member 18 can be reset, the bending strength of the material of the fastening belt 17 is reduced, thereby making the force dispersed to the side of the cable more even after the fastening belt 17 wraps the cable.

[0038] The above arrangement can achieve the goal of using the support member 18 to limit the position of the middle part of the fastening belt 17, so that all the fastening belts 17 are at the same height, reducing the influence of the fastening belt 17's own gravity on its position, and dividing the fastening belt 17 into two parts, the upper and lower parts, so that the fastening belt 17 naturally relaxes as the mounting bracket 15 moves, making it easier to insert the cable into the fastening belt 17.

[0039] See also Figure 6 In the vertical direction, the distance between the two ends of the fastening belt 17 is smaller than the maximum distance between the upper and lower sides thereof, thereby increasing the range of the fastening belt 17 wrapping the cable.

[0040] The above-mentioned process of fixing the cable is as follows: after placing the cable on the swing support 8, the left end of the cable is passed through all the fastening belts 17, and then the adjusting screw 16 is rotated. The adjusting screw 16 drives the two mounting brackets 15 to move, so that the distance between the two mounting brackets 15 is increased (the following description will take the movement of the front mounting bracket 15 and the fastening belt 17 fixed thereto as an example). The mounting bracket 15 drives the three adjacent fastening belts 17 to move forward, and the three fastening belts 17 drive the support member 18 to move forward together, and the distance between the inner side of the fastening belt 17 and the cable is gradually reduced. The tightening force of the tightening belt 17 on the cable is increased, and the fixing force of the cable is appropriate (appropriate here means that the cable will not slide relative to the tightening belt 17 during bending and torsion), and the adjusting screw 16 is stopped.

[0041] After the single cable inspection is completed, the adjusting screw 16 is rotated in the opposite direction so that the adjusting screw 16 drives the mounting bracket 15 to move backward, and the mounting bracket 15 drives the end of the fastening belt 17 to move backward. The three fastening belts 17 jointly drive the support member 18 to move backward until the support member 18 is reset. As the mounting bracket 15 continues to move backward, the support member 18 limits the position of the middle part of the fastening belt 17, so that the part of the fastening belt 17 above the support member 18 arches upward, and the part of the fastening belt 17 below the support member 18 is recessed downward, so that the fastening belt 17 is "relaxed", the distance between the upper and lower sides of the fastening belt 17 is expanded, and it is convenient to insert the cable into the fastening belt 17 later.

[0042] It should be noted that, in this embodiment, the cable to be detected is a three-core cable.

[0043] See also Figure 2 、 Figure 7 and Figure 8, also includes: a rotation-limiting fixing component provided on the right side of the fixed support 2 and used to provide a fixed terminal for the cable, the rotation-limiting fixing component includes: two symmetrically distributed mounting rings 19, six fastening rods 20, a flexible sleeve 21 and a fastening motor 22, a bracket is provided on the fixed support 2, the bracket is rotatably connected to the two mounting rings 19, the six fastening rods 20 are divided into two groups, the two groups of fastening rods 20 are respectively fixed to the opposite sides of the two mounting rings 19, the two groups of fastening rods 20 are staggered, the flexible sleeve 21 is provided on all the fastening rods 20, and the flexible sleeve 21 is provided with three accommodating portions distributed in an annular manner 211 and three wrapping parts 212 distributed in a ring shape, the three accommodating parts 211 and the three wrapping parts 212 are staggered, the accommodating parts 211 are used to accommodate the battery core of the cable, and the wrapping parts 212 are used to deform to both sides and wrap adjacent battery cores; the three fastening rods 20 in the same group of fastening rods 20 are respectively located in the three wrapping parts 212, the fastening motor 22 is fixed to the fixed support 2 through the bracket, and the two mounting rings 19 and the output shaft of the fastening motor 22 are driven by a bevel gear set (the bevel gear set is an existing structure and is not specifically shown in the drawings), which is used to make the two mounting rings 19 rotate in opposite directions.

[0044] The above arrangement can be achieved by using the flexible sleeve 21 to separate the three battery cells inside the cable, and fixing the cable by wrapping the battery cells with the flexible sleeve 21. At the same time, the flexible sleeve 21 is stretched by the tightening rod 20 to clamp the three battery cells to prevent the cable from rotating. In this way, the cable is not fixed by relying solely on the extrusion force, which reduces the probability of stress concentration at the cable fixing position, thereby reducing the impact of the cable fixing position on its overall insulation strength.

[0045] The above-mentioned process for fixing the cable is as follows: separate the three battery cells at the right end of the cable, insert the three battery cells into the adjacent accommodating portions 211 respectively, and push the cable as a whole to the right, so that the flexible sleeve 21 moves to the left relative to the battery cells of the cable, and the flexible sleeve 21 is stuck in the gap between the three battery cells until the cable can no longer move to the right, and then stop pushing the cable; start the tightening motor 22, and the tightening motor 22 drives the two mounting rings 19 to rotate in opposite directions through the bevel gear set, and the mounting ring 19 drives the three tightening rods 20 thereon to rotate, and the two tightening rods 20 in the same wrapping portion 212 move in opposite directions and gradually stretch the wrapping portion 212, so that the wrapping portion 212 gradually wraps toward the sides of the two adjacent battery cells, until the wrapping portion 212 can no longer be deformed, and then stop tightening the motor 22, thereby completing the fixation of the right end of the cable.

[0046] After the single cable test is completed, the tightening motor 22 is started in reverse to release the squeezing of the tightening rod 20 on the flexible sleeve 21 . The flexible sleeve 21 recovers its shape under its own elasticity, and the battery cell is pulled out of the accommodating portion 211 .

[0047] Example 3

[0048] This embodiment is used to simulate the fixed position of the cable at the joint of the industrial robot and test the influence of different bending radii on the pressure resistance performance.

[0049] See also Figures 1 to 4 and Figure 9 , also includes: a regulating component arranged on the swing support 8 and used to adjust the bending amplitude of the cable, the regulating component includes: a mounting member 23, a connecting rod 24, a limiting plate 25 and an extrusion block 26, the swing support 8 is fixedly connected to a bracket, the bracket is rotatably connected to the mounting member 23, and a torsion spring is fixedly connected between the mounting member 23 and its bracket, the connecting rod 24 is slidably connected to the mounting member 23, and the right side of the connecting rod 24 is fixed to the limiting plate 25, the mounting member 23, the connecting rod 24 and the limiting plate 25 are all symmetrically distributed front and back, so that the force of the extrusion block 26 is more uniform; the limiting plate 25 contacts the swing support 8, and the contact surfaces of the above two are provided with equidistantly distributed limiting teeth 251, the limiting teeth 251 are used to limit the limiting plate 25, limit the movement of the limiting plate 25 in the left and right directions, the extrusion block 26 is fixed to the limiting plate 25, and the extrusion block 26 is used to fix the cable.

[0050] The above arrangement enables the use of the extrusion block 26 to limit the position of the cable, thereby changing the bending radius of the cable and testing the influence of different bending radii on the pressure resistance performance of the cable.

[0051] The process of adjusting the position of the extrusion block 26 to change the bending radius of the cable is as follows: the extrusion block 26 is pulled upward so that the extrusion block 26 drives the connecting rod 24 and the limit plate 25 to swing, and the limit plate 25 loses contact with the limit tooth 251 on the swing support 8. The connecting rod 24 drives the mounting part 23 to rotate and twists the torsion spring of the mounting part 23, and then moves the extrusion block 26 to the predetermined position. The extrusion block 26 is then moved downward so that the limit plate 25 re-contacts the limit tooth 251 on the swing support 8, and the extrusion block 26 is limited in the left and right directions. During the movement of the extrusion block 26, the extrusion block 26 drives the connecting rod 24 to slide in the mounting part 23 through the limit plate 25, thereby changing the relative position of the extrusion block 26 on the swing support 8, and then changing the maximum bending radius of the cable when bending.

[0052] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A detection device for testing the voltage resistance of a cable, characterized in that: include: The detection platform (1) is fixedly connected to a fixed support (2), the fixed support (2) is slidably connected to a sliding support (3), the fixed support (2) is fixedly connected to a hydraulic push rod (4), the telescopic end of the hydraulic push rod (4) is fixedly connected to a pressure block (5), the pressure block (5) is located above the fixed support (2), the detection platform (1) is provided with a toothed ring (6), the toothed ring (6) is fixedly connected to two symmetrically distributed connecting plates (7), the two connecting plates (7) are rotatably connected to a swing support (8), the swing support (8) is located on a side of the sliding support (3) away from the fixed support (2), and the upper sides of the fixed support (2), the sliding support (3) and the swing support (8) are used to place the cable to be tested. The rotation axis of the toothless ring (6) is perpendicular to the rotation axis of the swing support (8), so that the swing support (8) can swing in two directions. A high-voltage generator is provided on the test platform (1), and a power component for driving the toothless ring (6) and the swing support (8) to rotate is provided on the test platform (1).

2. A detection device for testing the voltage resistance performance of a cable according to claim 1, characterized in that: The sliding support (3) is in contact with the swing support (8), and a spring is fixedly connected between the fixed support (2) and the sliding support (3), and the spring is used to maintain the contact state between the sliding support (3) and the swing support (8).

3. A detection device for testing the voltage resistance performance of a cable according to claim 2, characterized in that: The power assembly includes: Two rollers (9), a torsion motor (10), a first gear (11), a missing gear (12), a bending motor (13) and a second gear (14), wherein the roller (9) is rotatably connected to the detection platform (1), an arc groove (601) is provided on the outer peripheral side of the missing gear ring (6), and the roller (9) slides in the arc groove (601), the torsion motor (10) is fixedly connected to the detection platform (1), the first gear (11) is fixedly connected to the output shaft of the torsion motor (10) and is connected to the missing gear ring (6). The gear ring (6) is meshed, the first gear (11) and the roller (9) are respectively located on the inner and outer sides of the missing gear ring (6) and limit the missing gear ring (6), the missing gear (12) is fixedly connected to the swing support (8), the rotation axis of the missing gear (12) is collinear with the rotation axis of the swing support (8), the bending motor (13) is fixedly connected to the missing gear ring (6), and the second gear (14) is fixedly connected to the output shaft of the bending motor (13) and meshed with the missing gear (12).

4. A detection device for testing the voltage resistance of a cable according to claim 3, characterized in that: The rotation axis of the toothless ring (6) intersects with the rotation axis of the swing support (8), and the intersection of the two is located on the upper side of the swing support (8).

5. The detection device for testing the voltage resistance of a cable according to claim 3, characterized in that: Also includes: A flexible fixing component provided on a side of the swing support (8) away from the fixed support (2) and used to fix the free end of the cable; The flexible fixing component comprises: two symmetrically distributed mounting frames (15), an adjusting screw (16) and a plurality of fastening belts (17); the mounting frames (15) are slidably connected to the swing support (8); the mounting frames (15) are threadedly connected to the adjusting screw (16); the number of the fastening belts (17) is even and is divided into two groups; the directions of the two groups of fastening belts (17) are opposite and staggered; all the fastening belts (17) in the same group of fastening belts (17) are evenly spaced; both ends of the fastening belts (17) are fixedly connected to the adjacent mounting frames (15).

6. A detection device for testing the voltage withstand performance of a cable according to claim 5, characterized in that: A rubber layer is provided on the inner side of the fastening belt (17).

7. The detection device for testing the voltage resistance of a cable according to claim 5, characterized in that: In the vertical direction, the distance between the two ends of the fastening belt (17) is smaller than the maximum distance between the upper and lower sides thereof.

8. The detection device for testing the voltage withstand performance of a cable according to claim 5, characterized in that: All the fastening belts (17) in the same group of the fastening belts (17) are fixedly connected to a supporting member (18) in common, and the supporting member (18) is slidably connected to the adjacent mounting frame (15).

9. The detection device for testing the voltage resistance performance of a cable according to claim 5, characterized in that: Also includes: A rotation-limiting fixing component provided on a side of the fixed support (2) away from the swing support (8) and used to provide a fixed connection terminal of the cable; The rotation-limiting fixing assembly comprises: two symmetrically distributed mounting rings (19), a plurality of fastening rods (20), a flexible sleeve (21) and a fastening motor (22), the two mounting rings (19) are rotatably connected to the fixed support (2), all the fastening rods (20) are divided into two groups, the two groups of fastening rods (20) are respectively fixed to the opposite sides of the two mounting rings (19), the two groups of fastening rods (20) are staggered, the flexible sleeve (21) is sleeved on all the fastening rods (20), and the flexible sleeve (21) is provided with an annularly distributed accommodating portion (211) and an annular The number of the fastening rods (20) in a group of the fastening rods (20) is the same as the number of the accommodating portions (211) and the wrapping portions (212), the three accommodating portions (211) and the three wrapping portions (212) are staggered, the three fastening rods (20) in the same group are respectively located in the three wrapping portions (212), the fastening motor (22) is fixedly connected to the fixed support (2), and the two mounting rings (19) and the output shaft of the fastening motor (22) are driven by a bevel gear set to make the two mounting rings (19) rotate in opposite directions.

10. The detection device for testing the voltage withstand performance of a cable according to claim 9, characterized in that: Also includes: A regulating component disposed on the swing support (8) and used to adjust the bending amplitude of the cable; The regulating component comprises: a mounting member (23), a connecting rod (24), a limiting plate (25) and an extrusion block (26); the mounting member (23) is rotatably connected to the swing support (8), and a torsion spring is fixed between the mounting member (23) and the swing support (8); the connecting rod (24) is slidably connected to the mounting member (23); the side of the connecting rod (24) away from the mounting member (23) is fixed to the limiting plate (25); the limiting plate (25) contacts the swing support (8), and the contact surfaces of the above two are both provided with equidistantly distributed limiting teeth (251); the limiting teeth (251) are used to limit the limiting plate (25); the extrusion block (26) is fixed to the limiting plate (25); and the extrusion block (26) is used to fix the cable.

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