Power line testing device and testing method

Abstract

The present invention relates to the field of power line testing technology, and discloses a power line testing device and a testing method, including a chassis, a clamping mechanism and a counterweight mechanism, the chassis is a concave-shaped structure, the clamping mechanism includes a pair of turntables and a plurality of groups of eccentric rubber cylinders, the end faces of a pair of turntables that are away from each other are fixedly connected with a rotating shaft, the rotating shaft is rotatably installed between the inner walls of the two sides of the chassis, and a plurality of groups of eccentric rubber cylinders are arranged between the pair of turntables, and the counterweight mechanism includes a supporting plate and a plurality of pairs of eccentric wheels, the supporting plate is fixedly installed at the bottom of the inner wall of the chassis, and a plurality of pairs of eccentric wheels are evenly arranged on the top of the supporting plate. When the present invention is clamped, the power line connector is directly pressed between the eccentric rubber cylinders to achieve clamping, and when disassembled, the eccentric rubber cylinder can be driven to rotate and reset only by the friction between the power line connector and the eccentric rubber cylinder, and the clamping and disassembly are extremely convenient, avoiding the need to manually clamp the power line connectors one by one, and the cumbersome clamping operation.

Description

Technical Field

[0001] The present invention relates to the technical field of power line testing, in particular to a power line testing device and a testing method. Background Art

[0002] The power cord usually includes a cable and a plug and terminal connected to both ends of the cable. Before it is put into use, it must undergo a series of tests in accordance with national standards. Specifically, the cable needs to be subjected to a bending and swing test to verify the fastening method of the power cord DC head and the number of folding times, thereby ensuring the quality of the cable products.

[0003] The bending and swing test is to repeatedly bend and swing the power cord to simulate the bending conditions that may occur in actual use, so as to evaluate its durability and fatigue resistance. In the prior art, the bending and swing test generally requires a bending and swing tester. In the prior art, the power cords are generally placed inside the swing device one by one, and then multiple sets of screws are used to clamp the power cord connectors one by one before the test can be carried out. The operation is cumbersome and the test efficiency is low. Summary of the invention

[0004] The object of the present invention is to provide a power line testing device and a testing method to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a power line testing device and a testing method, comprising a chassis, the chassis is a concave-shaped structure;

[0007] The clamping mechanism includes a pair of rotating disks and a plurality of eccentric rubber tubes. The end surfaces of the pair of rotating disks that are away from each other are fixedly connected with rotating shafts. The rotating shafts are rotatably mounted between the inner walls of the two sides of the chassis. The plurality of eccentric rubber tubes are arranged between the pair of rotating disks.

[0008] The counterweight mechanism comprises a supporting plate and a plurality of pairs of eccentric wheels. The supporting plate is fixedly mounted on the bottom of the inner wall of the chassis, and the plurality of pairs of eccentric wheels are evenly arranged on the top of the supporting plate.

[0009] Furthermore, a driving disk is fixedly installed on one end of the rotating shaft away from the turntable, a first sliding groove is opened on the side of the driving disk away from the rotating shaft, a servo motor is arranged on the side of the driving disk away from the rotating shaft, the servo motor is fixedly installed on the inner wall of the chassis, and an output end of the servo motor is fixedly connected to an eccentric shaft, and the eccentric shaft is slidably arranged inside the first sliding groove.

[0010] Furthermore, a fixed block is fixedly installed on one side of the two turntables close to each other, a first horizontal plate and a second horizontal plate are symmetrically fixedly installed between the two fixed blocks, a number of jacks are evenly opened on the first horizontal plate, a number of pairs of mounting holes are fixedly connected on the inner walls of the first horizontal plate and the second horizontal plate, and a number of openings are evenly opened on the second horizontal plate.

[0011] Furthermore, an operating rod is rotatably installed inside the fixed block, one end of the operating rod is provided with a transmission thread, and a movable column is slidably installed inside the socket, one end of the movable column is fixedly installed with a push plate, and the push plate is located between the first horizontal plate and the second horizontal plate. A connecting plate is fixedly installed at one end of several movable columns away from the push plate, and screw barrels are fixedly installed at both ends of the connecting plate, and the transmission thread is threadedly connected to the screw barrel.

[0012] Furthermore, each group of eccentric rubber tubes includes two symmetrically arranged eccentric rubber tubes, both ends of which are fixedly connected to mounting columns, the mounting columns on each pair of eccentric rubber tubes are rotatably installed inside a group of mounting holes, a pressure plate is fixedly connected to the bottom of the side close to each other between each group of eccentric rubber tubes, each group of eccentric rubber tubes is arranged between a pair of L-shaped plates, and a pair of blocks are fixedly connected to the inner wall of the side close to each other between each pair of L-shaped plates.

[0013] Furthermore, a telescopic rod is fixedly installed on the mounting column, and circular plates are fixedly connected to both ends of the telescopic rod. A spring is installed between each pair of circular plates, and the spring is sleeved on the telescopic rod. A roller is rotatably installed on the end of the telescopic rod away from the mounting column, and the roller slides along the inner wall of the L-shaped plate between each pair of blocks.

[0014] Furthermore, a plurality of sleeves are fixedly mounted on the upper surface of the support plate, sliders are slidably mounted inside the sleeves, support plates are fixedly mounted on the top of the sliders, a second slide groove is opened in the center of the bottom of the support plate, springs are installed between the sliders and the inner wall of the bottom of the sleeves, and screws are fixedly mounted on the sides of every two adjacent support plates close to each other.

[0015] Furthermore, the eccentric wheels are rotatably mounted on the threaded sleeve, and the end of the threaded sleeve away from the eccentric wheel is fixedly connected with an anti-skid disk, and the anti-skid disk is threadedly connected to the corresponding screw rod, and an eccentric clamping disk is rotatably mounted on the side close to each other of each pair of eccentric wheels, and an arc-shaped opening is opened on the edge of the eccentric wheel, and an installation channel is formed together by the arc-shaped openings on several pairs of eccentric wheels, and a pressure rod is slidably installed inside the installation channel formed by the several arc-shaped openings, and the pressure rod is slidably arranged inside the second slide groove, and pressurized cylinders are fixedly mounted on both ends of the pressure rod, and the pressurized cylinders are fixedly mounted on the side walls of the chassis.

[0016] A power line testing device and a testing method, comprising the following steps:

[0017] Step 1: Pass the end of the handheld power cord through the opening and place it between a pair of eccentric rubber cylinders. Pull the power cord downward to drive the eccentric rubber cylinder to rotate by squeezing the pressing plate, and fix the pair of eccentric rubber cylinders with the telescopic rod and spring to clamp the power cord connector.

[0018] Step 2: Straighten the wire harness of the power cord and place it between a pair of clamping plates, rotate the anti-slip plate to control a pair of threaded sleeves and an eccentric wheel to approach each other, and clamp the wire harness of the power cord with the clamping plates;

[0019] Step three, controlling the pressurized cylinder to push the pressure rod downward, pushing several groups of eccentric wheels to move downward synchronously, thereby applying a controllable counterweight force to the power line harness;

[0020] Step 4: Start the servo motor, and the eccentric shaft slides inside the slide slot, which in turn drives the turntable and the drive disc to swing back and forth, and performs a bending and swinging test. At the same time, the power cord harness can pull several groups of eccentric wheels to swing synchronously, simulating the free swinging action of the harness due to the gravity of the counterweight.

[0021] The present invention has the following beneficial effects:

[0022] (1) When the present invention clamps the power cord, the power cord connector is directly pressed between a pair of eccentric rubber tubes, and the pair of eccentric rubber tubes are fixed by using a telescopic rod and a spring, so that the power cord connector is clamped. When disassembling, the eccentric rubber tube can be driven to rotate and reset only by the friction between the power cord connector and the eccentric rubber tube. The clamping and disassembly is extremely convenient, avoiding the need to manually clamp the power cord connectors one by one, and the cumbersome clamping operation.

[0023] (2) When necessary, the present invention can control the movement of the connecting plate through the fixed block, and the movable column can move synchronously, thereby controlling the position of the push plate between the first horizontal plate and the second horizontal plate, thereby pushing the power cord connector to slide between the eccentric rubber cylinder to adjust the position of the power cord connector and ensure that the center of the power cord connector is located on the central axis of the turntable, thereby avoiding the influence of external factors on the test results. By controlling the setting of the push plate, the device can be suitable for testing power cords of various sizes.

[0024] (3) The present invention can clamp the power cord harness and apply a counterweight force by setting a counterweight mechanism, thereby avoiding the need to bind weights to the power cord harness before testing. When performing a bending and swing test, the power cord harness can pull several groups of eccentric wheels to swing synchronously, simulating the free swinging action of the harness due to the gravity of the counterweight, thereby increasing the accuracy of the experiment.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the clamping structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 A is a partial enlarged schematic diagram;

[0030] Figure 4 This is a schematic diagram of the first horizontal plate structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the second horizontal plate of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the movable column of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the eccentric rubber cylinder of the present invention;

[0034] Figure 8 It is a schematic diagram of the counterweight mechanism of the present invention;

[0035] Fig. 9 This is a schematic diagram of the support plate structure of the present invention;

[0036] Fig.10 This is a schematic diagram of the eccentric wheel structure of the present invention;

[0037] Fig.11 It is a schematic diagram of the compression rod structure of the present invention;

[0038] Fig.12 It is a schematic diagram of the working process of the present invention.

[0039] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0040] In the figure: 1, chassis; 2, turntable; 21, shaft; 211, drive plate; 212, first slide; 22, servo motor; 221, eccentric shaft; 23, fixed block; 231, operating rod; 232, transmission thread; 24, first horizontal plate; 241, jack; 242, mounting hole; 25, second horizontal plate; 251, opening; 26, movable column; 261, push plate; 27, connecting plate; 271, screw barrel; 3, eccentric rubber barrel; 3 01. Mounting column; 302. Pressure plate; 31. L-shaped plate; 311. Stopper; 32. Telescopic rod; 321. Round plate; 33. Spring 1; 34. Roller; 4. Support plate; 41. Sleeve; 42. Slider; 43. Support plate; 431. Second slide groove; 44. Spring 2; 45. Screw; 5. Eccentric wheel; 51. Threaded sleeve; 511. Anti-slip disc; 52. Clamping disc; 53. Arc-shaped mouth; 54. Pressure rod; 55. Pressurized cylinder. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 - Fig.11 As shown, the present invention is a power line testing device and a testing method, comprising a chassis 1, the chassis 1 is a concave structure;

[0043] The clamping mechanism includes a pair of rotating disks 2 and a plurality of eccentric rubber tubes 3. The end surfaces of the pair of rotating disks 2 that are away from each other are fixedly connected with a rotating shaft 21. The rotating shaft 21 is rotatably mounted between the inner walls of the two sides of the chassis 1. The plurality of eccentric rubber tubes 3 are arranged between the pair of rotating disks 2.

[0044] The counterweight mechanism includes a support plate 4 and a plurality of pairs of eccentric wheels 5 . The support plate 4 is fixedly mounted on the bottom of the inner wall of the chassis 1 , and the plurality of pairs of eccentric wheels 5 are evenly arranged on the top of the support plate 4 .

[0045] A driving disk 211 is fixedly installed on one end of the rotating shaft 21 away from the turntable 2, a first sliding groove 212 is opened on the side of the driving disk 211 away from the rotating shaft 21, a servo motor 22 is arranged on the side of the driving disk 211 away from the rotating shaft 21, the servo motor 22 is fixedly installed on the inner wall of the chassis 1, and an eccentric shaft 221 is fixedly connected to the output end of the servo motor 22, and the eccentric shaft 221 is slidably arranged inside the first sliding groove 212.

[0046] A fixing block 23 is fixedly installed on the side where the two turntables 2 are close to each other, and a first transverse plate 24 and a second transverse plate 25 are symmetrically fixedly installed between the two fixing blocks 23. A plurality of jacks 241 are evenly opened on the first transverse plate 24, and a plurality of pairs of mounting holes 242 are fixedly connected on the inner walls of the first transverse plate 24 and the second transverse plate 25, and a plurality of openings 251 are evenly opened on the second transverse plate 25.

[0047] An operating rod 231 is rotatably installed inside the fixed block 23, and a transmission thread 232 is provided at one end of the operating rod 231. A movable column 26 is slidably installed inside the jack 241, and a push plate 261 is fixedly installed at one end of the movable column 26. The push plate 261 is located between the first horizontal plate 24 and the second horizontal plate 25. A connecting plate 27 is fixedly installed at one end of several movable columns 26 away from the push plate 261. Screw barrels 271 are fixedly installed at both ends of the connecting plate 27, and the transmission thread 232 is threadedly connected to the screw barrel 271.

[0048] Each group of eccentric rubber tubes 3 includes two symmetrically arranged eccentric rubber tubes 3, both ends of the eccentric rubber tubes 3 are fixedly connected with mounting columns 301, the mounting columns 301 on each pair of eccentric rubber tubes 3 are rotatably installed inside a group of mounting holes 242, a pressure plate 302 is fixedly connected to the bottom of one side close to each other between each group of eccentric rubber tubes 3, each group of eccentric rubber tubes 3 is arranged between a pair of L-shaped plates 31, and a pair of stoppers 311 are fixedly connected to the inner walls of one side close to each other between each pair of L-shaped plates 31.

[0049] A telescopic rod 32 is fixedly installed on the mounting column 301, and circular plates 321 are fixedly connected to both ends of the telescopic rod 32. A spring 33 is installed between each pair of circular plates 321, and the spring 33 is sleeved on the telescopic rod 32. A roller 34 is rotatably installed on the end of the telescopic rod 32 away from the mounting column 301, and the roller 34 slides along the inner wall of the L-shaped plate 31 between each pair of stoppers 311.

[0050] A plurality of sleeves 41 are fixedly mounted on the upper surface of the support plate 4, and sliders 42 are slidably mounted inside the sleeves 41. A support plate 43 is fixedly mounted on the top of the sliders 42. A second slide groove 431 is provided at the bottom center of the support plate 43. A spring 44 is installed between the sliders 42 and the inner wall of the bottom of the sleeve 41, and a screw 45 is fixedly mounted on the side where each two adjacent support plates 43 are close to each other.

[0051] The eccentric wheels 5 are all rotatably installed on the threaded sleeve 51, and the end of the threaded sleeve 51 away from the eccentric wheel 5 is fixedly connected with an anti-skid plate 511, and the anti-skid plate 511 is threadedly connected to the corresponding screw 45. An eccentric clamping plate 52 is rotatably installed on the side close to each other of each pair of eccentric wheels 5. An arc-shaped opening 53 is opened on the edge of the eccentric wheel 5, and a mounting channel is formed between the arc-shaped openings 53 on several pairs of eccentric wheels 5. A pressure rod 54 is slidably installed inside the mounting channel formed by several arc-shaped openings 53. The pressure rod 54 is slidably set inside the second slide groove 431, and pressurized cylinders 55 are fixedly installed at both ends of the pressure rod 54. The pressurized cylinder 55 is fixedly installed on the side wall of the chassis 1.

[0052] When in use, the end of the handheld power cord passes through the opening 251 and is placed between a pair of eccentric rubber tubes 3. The power cord is pulled downward to drive the eccentric rubber tube 3 to rotate by squeezing the pressing plate 302, and the eccentric rubber tube 3 is fixed with the telescopic rod 32 and the spring 33 to clamp the power cord connector;

[0053] Among them, the telescopic rod 32 and the spring 1 33 are first telescoped and then extended. After the power cord connector is clamped, the elastic force applied by the spring 1 33 can ensure the stability of the clamping;

[0054] In addition, when necessary, the connecting plate 27 can be controlled to move through the fixed block 23, and the movable column 26 can move synchronously, so that the position of the push plate 261 between the first horizontal plate 24 and the second horizontal plate 25 can be controlled, so that the power cord connector can be pushed to slide between the eccentric rubber cylinder 3 to adjust the position of the power cord connector, so as to ensure that the center of the power cord connector is located on the central axis of the turntable 2, thereby avoiding the influence of external factors on the test results, and by controlling the setting of the push plate 261, the device can be suitable for testing power cords of various sizes;

[0055] Afterwards, the power line harness is straightened and placed between a pair of clamping plates 52, and the anti-slip plate 511 is rotated to control the pair of threaded sleeves 51 and the eccentric wheel 5 to approach each other, and the power line harness is clamped with the clamping plates 52;

[0056] The pressurized cylinder 55 is controlled to work to push the pressure rod 54 downward, and pushes a plurality of eccentric wheels 5 to move downward synchronously, thereby applying a controllable counterweight force to the power line harness;

[0057] The servo motor 22 is started, and the eccentric shaft 221 slides inside the first slide slot 212, thereby driving the turntable 2 and the driving disk 211 to swing back and forth, and a bending and swinging test is performed. At the same time, the power line harness can pull several groups of eccentric wheels 5 to swing synchronously, simulating the free swinging action of the harness due to the gravity of the counterweight, thereby increasing the accuracy of the experiment;

[0058] After the test is completed, the anti-skid disk 511 is rotated in the opposite direction to control the clamping disk 52 to open, and the power cord connector is pulled upward. The friction between the power cord connector and the eccentric rubber tube 3 can drive the eccentric rubber tube 3 to rotate and reset. The clamping and disassembly is extremely convenient, avoiding the need to manually clamp the power cord connectors one by one, and the cumbersome clamping operation. Example 2

[0059] like Fig.12 As shown, a power line testing device and a testing method include the following steps:

[0060] Step 1: Pass the end of the handheld power cord through the opening 251 and place it between a pair of eccentric rubber tubes 3. Pull the power cord downward to drive the eccentric rubber tube 3 to rotate by squeezing the pressing plate 302, and fix the eccentric rubber tube 3 with the telescopic rod 32 and the spring 33 to clamp the power cord connector.

[0061] Step 2: Straighten the wire harness of the power cord and place it between a pair of chucks 52, rotate the anti-slip disc 511 to control the pair of threaded sleeves 51 and the eccentric wheel 5 to approach each other, and cooperate with the chuck 52 to clamp the wire harness of the power cord;

[0062] Step 3, control the pressurized cylinder 55 to work and push the pressure rod 54 downward, pushing the plurality of eccentric wheels 5 to move downward synchronously, thereby applying a controllable counterweight force to the power line harness;

[0063] Step 4, start the servo motor 22, the eccentric shaft 221 slides inside the first slide groove 212, and then drives the turntable 2 and the driving disk 211 to swing back and forth, and perform a bending and swinging test. At the same time, the power cord harness can pull several groups of eccentric wheels 5 to swing synchronously, simulating the action of the harness swinging freely due to the gravity of the counterweight.

[0064] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A power line testing device, comprising a chassis (1), wherein the chassis (1) is a concave-shaped structure. It is characterized in that Also includes: A clamping mechanism, the clamping mechanism comprising a pair of rotating disks (2) and a plurality of groups of eccentric rubber tubes (3), the end surfaces of the pair of rotating disks (2) being away from each other are both fixedly connected with a rotating shaft (21), the rotating shaft (21) being rotatably mounted between the inner walls of both sides of the chassis (1), and the plurality of groups of eccentric rubber tubes (3) being arranged between the pair of rotating disks (2); A counterweight mechanism, the counterweight mechanism comprising a support plate (4) and a plurality of pairs of eccentric wheels (5), the support plate (4) being fixedly mounted on the bottom of the inner wall of the chassis (1), and the plurality of pairs of eccentric wheels (5) being evenly arranged on the top of the support plate (4); A fixing block (23) is fixedly installed on one side of the two rotating disks (2) close to each other, a first transverse plate (24) and a second transverse plate (25) are symmetrically fixedly installed between the two fixing blocks (23), a plurality of insertion holes (241) are evenly opened on the first transverse plate (24), a plurality of pairs of mounting holes (242) are fixedly connected on the inner walls of the first transverse plate (24) and the second transverse plate (25), and a plurality of openings (251) are evenly opened on the second transverse plate (25); An operating rod (231) is rotatably mounted inside the fixed block (23), one end of the operating rod (231) is provided with a transmission thread (232), a movable column (26) is slidably mounted inside the insertion hole (241), one end of the movable column (26) is fixedly mounted with a push plate (261), the push plate (261) is located between the first horizontal plate (24) and the second horizontal plate (25), a connecting plate (27) is fixedly mounted on one end of a plurality of the movable columns (26) away from the push plate (261), both ends of the connecting plate (27) are fixedly mounted with a screw barrel (271), and the transmission thread (232) is threadedly connected to the screw barrel (271); Each group of the eccentric rubber tubes (3) comprises two symmetrically arranged eccentric rubber tubes (3), both ends of the eccentric rubber tubes (3) are fixedly connected with mounting columns (301), the mounting columns (301) on each pair of the eccentric rubber tubes (3) are rotatably mounted inside a group of mounting holes (242), a pressing plate (302) is fixedly connected to the bottom of a side close to each other between each group of the eccentric rubber tubes (3), each group of the eccentric rubber tubes (3) is arranged between a pair of L-shaped plates (31), and a pair of stoppers (311) are fixedly connected to the inner walls of a side close to each other between each pair of the L-shaped plates (31); A telescopic rod (32) is fixedly mounted on the mounting column (301), and both ends of the telescopic rod (32) are fixedly connected to circular plates (321). A spring (33) is mounted between each pair of circular plates (321), and the spring (33) is sleeved on the telescopic rod (32). A roller (34) is rotatably mounted on one end of the telescopic rod (32) away from the mounting column (301), and the roller (34) slides along the inner wall of the L-shaped plate (31) between each pair of stoppers (311).

2. A power line testing device according to claim 1, Features: A driving disk (211) is fixedly mounted on one end of the rotating shaft (21) away from the rotating disk (2); a first sliding groove (212) is provided on the side of the driving disk (211) away from the rotating shaft (21); a servo motor (22) is provided on the side of the driving disk (211) away from the rotating shaft (21); the servo motor (22) is fixedly mounted on the inner wall of the chassis (1); an eccentric shaft (221) is fixedly connected to the output end of the servo motor (22); and the eccentric shaft (221) is slidably arranged inside the first sliding groove (212).

3. A power line testing device according to claim 1, Features: A plurality of sleeves (41) are fixedly mounted on the upper surface of the support plate (4), a slider (42) is slidably mounted inside each sleeve (41), a support plate (43) is fixedly mounted on the top of each slider (42), a second slide groove (431) is provided at the center of the bottom of each support plate (43), a second spring (44) is mounted between each slider (42) and the inner wall of the bottom of the sleeve (41), and a screw rod (45) is fixedly mounted on the side close to each other of each two adjacent support plates (43).

4. A power line testing device according to claim 3, Features: The eccentric wheels (5) are all rotatably mounted on the threaded sleeve (51), and an anti-skid plate (511) is fixedly connected to one end of the threaded sleeve (51) away from the eccentric wheel (5), and the anti-skid plate (511) is threadedly connected to the corresponding screw rod (45). An eccentric clamping plate (52) is rotatably mounted on the side close to each other of each pair of eccentric wheels (5). The edges of the eccentric wheels (5) are each provided with an arc-shaped opening (53), and a mounting channel is formed between a plurality of pairs of arc-shaped openings (53). A pressure rod (54) is slidably mounted inside the mounting channel formed by the plurality of arc-shaped openings (53), and the pressure rod (54) is slidably arranged inside the second slide groove (431). A pressurizing cylinder (55) is fixedly mounted on both ends of the pressure rod (54), and the pressurizing cylinder (55) is fixedly mounted on the side wall of the chassis (1).

5. A method for testing a power line testing device according to any one of claims 1 to 4, It is characterized in that The steps include: Step 1: pass the end of the handheld power cord through the opening (251) and place it between a pair of eccentric rubber cylinders (3), pull the power cord downward, drive the eccentric rubber cylinder (3) to rotate by squeezing the pressing plate (302), and fix the eccentric rubber cylinder (3) with the telescopic rod (32) and spring 1 (33), so as to clamp the power cord connector; Step 2, straighten the wire harness of the power cord and place it between a pair of clamping plates (52), rotate the anti-slip plate (511) to control the pair of threaded sleeves (51) and the eccentric wheel (5) to approach each other, and cooperate with the clamping plates (52) to clamp the wire harness of the power cord; Step three, controlling the pressurized cylinder (55) to work and push the pressure rod (54) downward, pushing the plurality of eccentric wheels (5) to move downward synchronously, thereby applying a controllable counterweight force to the power line harness; Step 4: Start the servo motor (22), and the eccentric shaft (221) slides inside the first slide groove (212), thereby driving the turntable (2) and the drive disk (211) to swing back and forth, and perform a bending and swinging test. At the same time, the power line harness can pull a plurality of groups of eccentric wheels (5) to swing synchronously, simulating the free swinging action of the harness due to the gravity of the counterweight.

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