High-precision tension and torsion testing device for power line

Abstract

The utility model discloses a high-precision tension and torsion testing device for a power line, and relates to the technical field of tension and torsion testing, the high-precision tension and torsion testing device comprises a test bed, an electric cabinet and a fixing assembly, the electric cabinet and the fixing assembly are arranged at the top of the test bed, a connecting groove is formed in the right side of the top of the test bed, and a lead screw is rotatably connected in the connecting groove; the surface of the lead screw is in threaded connection with a sliding block, the top of the sliding block is fixedly connected with a connecting plate, a stepping motor is arranged on the right side of the connecting plate, the output end of the stepping motor is fixedly connected with a planetary gear reducer, and the output end of the planetary gear reducer is fixedly connected with a rotating shaft of the rotating clamping cylinder. According to the scheme, the planetary gear reducer is additionally arranged between the output shaft of the stepping motor and the rotary clamping cylinder, so that the stepping angle of the stepping motor can be further subdivided, the output rotating speed and torque of the stepping motor are within the range where the electric cabinet is easier to accurately regulate and control, the control precision of the rotary clamping cylinder is improved, and the working efficiency is improved. And the influence of the accumulated error of the step angle on the test result is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tensile and torsional force testing technology, specifically to a high-precision tensile and torsional force testing device for power cords. Background Technology

[0002] A power cord is a conductor that connects an appliance to a power outlet and transmits electrical energy. It generally consists of a conductor, an insulation layer, and a sheath. Safety testing standards for electrical products include push-pull-torque tests for power cords. These tests apply specific values ​​of push, pull, and torque to the power cord of the appliance, and the degree of damage to the appliance must meet the required standards.

[0003] However, existing tensile and torsion testing devices have some problems in use: the power cords equipped with various products differ in size and specifications, so when fixing different power cords, it is necessary to change the appropriate fixing equipment, which is time-consuming and laborious; in the actual tensile and torsion testing process, existing devices cannot achieve accurate readings, nor can they accurately control the degree of tension and the number of torsion turns, thus failing to obtain accurate parameters of the power cord's tension and torsion. Therefore, to solve the above problems, a high-precision tensile and torsion testing device for power cords is proposed. Utility Model Content

[0004] To solve the above-mentioned technical problems, a high-precision tensile and torsional force testing device for power cords is provided. This technical solution solves the problems mentioned in the background art, such as the need to change the appropriate fixing equipment when fixing power cords of different sizes and specifications, which is time-consuming and laborious; the inability to achieve accurate readings; and the difficulty in accurately controlling the degree of tension and the number of torsion turns, thus making it impossible to obtain accurate parameters of the tension and torsion of the power cord.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-precision tensile and torsional force testing device for power cords includes a test bench, an electrical control box, and a fixing component. The electrical control box and the fixing component are located on the top of the test bench. A support base is fixedly installed on the top left side of the test bench. A first fixing block is fixedly connected to the right side of the support base. A fixing component is fixedly connected to the right side of the first fixing block. A connection groove is provided on the top right side of the test bench.

[0007] The fixing component includes a base, the left side of which is fixedly connected to the right side of the first fixing block, a sleeve is fixedly installed on the right side of the base, a tightening port is fixedly connected to the front end of the sleeve, and a tightening nut is threadedly connected to the outer surface of the sleeve.

[0008] A scale plate is fixedly installed on both sides of the connecting groove, and a scale strip is provided on the opposite side of the scale plate. A lead screw is rotatably connected inside the connecting groove, and a sliding block is threadedly connected to the surface of the lead screw. A connecting plate is fixedly connected to the top of the sliding block.

[0009] A second fixing block is fixedly connected to the left side of the connecting plate, a stepper motor is provided on the right side of the connecting plate, and a rotating clamping cylinder is provided on the left side of the second fixing block.

[0010] Preferably, a rotary motor is provided on the right side of the test bench, and the output end of the rotary motor is fixedly connected to one end of the lead screw.

[0011] Preferably, a sliding groove is provided on the opposite side of the two scale plates, and limit blocks are provided on the front and rear sides of the connecting plate. The connecting plate is slidably connected to the sliding groove through the limit blocks on both sides.

[0012] Preferably, sensors are provided on opposite sides of both the first fixing block and the second fixing block.

[0013] Preferably, the rotating clamping cylinder has an arc-shaped clamp inside, and the rotating clamping cylinder has wire clamp knobs symmetrically arranged along the rotation axis. One end of the wire clamp knob is fixedly connected to the back of the arc-shaped clamp.

[0014] Preferably, the output end of the stepper motor is fixedly connected to a planetary gear reducer, and the output end of the planetary gear reducer is fixedly connected to the rotation shaft of the rotating clamping cylinder.

[0015] Preferably, the electrical control box is electrically connected to the stepper motor and the rotary motor, and the electrical control box also includes a control panel and a power switch.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model solution uses a nut sleeve type fixing component, combined with a clamping plate type holding cylinder, to fix power cables of different sizes and specifications under test. It is simple to operate and reduces the cost of the device.

[0018] This utility model solution adds an electrical control box, which outputs pulse signals and direction signals, and connects directly to the control terminal of the stepper motor via signal lines. The pulse signals control the step angle and number of steps of the stepper motor, and the direction signals control the rotation direction of the stepper motor, thereby precisely controlling the rotation angle and direction of the stepper motor.

[0019] This invention adds a planetary gear reducer between the stepper motor output shaft and the clamping component, which can further refine the step angle of the stepper motor, making its output speed and torque more easily and precisely controlled by the control box. This improves the control accuracy of the rotating clamping cylinder and reduces the impact of cumulative step angle error on the test results. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;

[0022] Figure 3 This is a schematic diagram of the front view of this utility model.

[0023] The numbers on the map are:

[0024] 1. Test bench; 2. Electrical control box; 3. Support base; 4. First fixing block;

[0025] 5. Fixing component; 51. Base; 52. Sleeve; 53. Tightening port; 54. Tightening nut;

[0026] 6. Connecting groove; 61. Scale plate; 62. Scale strip; 63. Lead screw; 64. Sliding block; 65. Rotary motor; 66. Slide groove;

[0027] 7. Connecting plate; 71. Second fixing block; 72. Rotary clamping cylinder; 73. Arc-shaped clamping plate; 74. Wire clamp knob; 75. Stepper motor; 76. Planetary gear reducer. Detailed Implementation

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] Please see Figure 1-3 As shown, a high-precision tensile and torsional force testing device for power cords includes a test bench 1, an electrical control box 2, and a fixing component 5. The electrical control box 2 and the fixing component 5 are located on the top of the test bench 1. A support base 3 is fixedly installed on the top left side of the test bench 1, and a first fixing block 4 is fixedly connected to the right side of the support base 3.

[0030] Specifically, a fixing component 5 is fixedly connected to the right side of the first fixing block 4. The fixing component 5 includes a base 51, the left side of which is fixedly connected to the right side of the first fixing block 4. A sleeve 52 is fixedly installed on the right side of the base 51, and a tightening port 53 is fixedly connected to the front end of the sleeve 52. A tightening nut 54 is threadedly connected to the outer surface of the sleeve 52. The nut-sleeve type fixing component 5 is suitable for power cords of different sizes and specifications. By rotating the tightening nut 54 on the outer surface of the sleeve 52 toward the tightening port 53, the power cord to be tested can be clamped.

[0031] Please see Figure 2As shown, a connecting groove 6 is provided on the top right side of the test bench 1. Scale plates 61 are fixedly installed on both sides of the connecting groove 6. Scale strips 62 are provided on opposite sides of the scale plates 61. The scale strips 62 on the scale plates 61 can be directly read, making the tensile force and torque visible and improving the accuracy of the experimental data. A lead screw 63 is rotatably connected inside the connecting groove 6. The pitch of the lead screw 63 is fixed and precise. Each rotation moves the sliding block 64 a fixed and precise distance. The rotary motor 65 drives the lead screw 63 to rotate, enabling the sliding block 64 to move left and right on the lead screw 63 with high precision. A rotary motor 65 is installed on the right side of the test bench 1. The output end of the rotary motor 65 is fixedly connected to one end of a lead screw 63. A sliding block 64 is threaded onto the surface of the lead screw 63. A connecting plate 7 is fixedly connected to the top of the sliding block 64. A groove 66 is formed on the opposite side of the two scale plates 61. Limit blocks are set on the front and rear sides of the connecting plate 7. The connecting plate 7 is slidably connected to the groove 66 through the limit blocks on both sides. The output end of the rotary motor 65 drives the lead screw 63 to rotate, causing the sliding block 64 to move the connecting plate 7 horizontally along the groove 66 through the limit blocks, thereby causing the power cord to perform a stretching motion. At the same time, the sensor set on the second fixed block 71 on the left side of the connecting plate 7 moves accordingly and works with the scale plate 61 to effectively monitor the stretching distance of the power cord. The second fixed block 71 is fixedly connected to the left side of the connecting plate 7. Sensors are set on the opposite side of the first fixed block 4 and the second fixed block 71. A rotating clamping cylinder 72 is located on the left side of the second fixing block 71. Inside the rotating clamping cylinder 72 is an arc-shaped clamping piece 73. A wire clamp knob 74 is symmetrically arranged along the rotation axis of the rotating clamping cylinder 72, with one end of the knob fixedly connected to the back of the arc-shaped clamping piece 73. Rotating the knob causes the arc-shaped clamping piece 73 to clamp the power cable, ensuring the power cable is securely fixed on the rotation axis of the rotating clamping cylinder 72. A stepper motor 75 is located on the right side of the connecting plate 7. A planetary gear reducer 76 is fixedly connected to the output end of the stepper motor 75. The planetary gear reducer 76 can further refine the step angle of the stepper motor 75, making the output speed and torque more easily and precisely controlled within the range of the control box 2, improving the control accuracy of the rotating clamping cylinder 72 and reducing the impact of accumulated step angle errors on the test results. The output end of the planetary gear reducer 76 is fixedly connected to the rotation axis of the rotating clamping cylinder 72. The power generated by the stepper motor 75 is transmitted to the planetary gear reducer 76 connected to it. The planetary gear reducer 76 uses its unique gear structure to reduce the original high speed of the stepper motor 75 by a certain proportion. At the same time, after adjusting the torque accordingly, it drives the rotating clamping cylinder 72 to rotate around the axis, thereby performing torque testing on the power cord.

[0032] Furthermore, in the above technical solution, the electrical control box 2 is electrically connected to the stepper motor 75 and the rotary motor 65. The electrical control box 2 also includes a control panel and a power switch. The electrical control box 2 outputs pulse signals and direction signals, and directly connects to the control terminal of the stepper motor 75 via signal lines. The pulse signals control the step angle and number of steps of the stepper motor 75, and the direction signals control the rotation direction of the stepper motor 75, thereby precisely controlling the rotation angle and direction of the stepper motor 75.

[0033] Working Principle: In use, one end of the power cable to be tested is first passed through the fixing assembly 5 and into the rotating clamping cylinder 72. The clamp knob 74 is rotated to clamp the power cable with the arc-shaped clamping plate 73. Next, the tightening nut 54 on the outer surface of the sleeve 52 is rotated towards the tightening opening 53, engaging with the rotating clamping cylinder 72 to clamp and fix the power cable. Then, the power is turned on through the control box 2, and the rotating motor 65 is started. The output of the rotating motor 65 drives the lead screw 63 to rotate, causing the sliding block 64 to move the connecting plate 7 horizontally along the slide groove 66 via the limit block, thereby causing the power cable to undergo tensile motion. Simultaneously, the sensor on the second fixing block 71 on the left side of the connecting plate 7 moves accordingly, effectively monitoring the distance of the power cable's stretch in conjunction with the scale plate 61, thus achieving the tensile test of the power cable. The stepper motor 75 is started by the control box 2. The power generated by the stepper motor 75 is transmitted to the planetary gear reducer 76 connected to it. The planetary gear reducer 76 uses its unique gear structure to reduce the original high speed of the stepper motor 75 by a certain proportion. At the same time, after adjusting the torque accordingly, it drives the rotating clamping cylinder 72 to rotate around the axis. Since the two ends of the power cord are firmly clamped, the power cord bears the corresponding torque as the rotating clamping cylinder 72 rotates, thereby realizing the torque test of the power cord and effectively evaluating the performance of the power cord under tensile and torque conditions.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision tensile and torsional force testing device for power cords, comprising a test bench (1), an electrical control box (2), and a fixing assembly (5), characterized in that: The electrical control box (2) and the fixing component (5) are set on the top of the test bench (1). A support base (3) is fixedly installed on the left side of the top of the test bench (1). A first fixing block (4) is fixedly connected to the right side of the support base (3). A fixing component (5) is fixedly connected to the right side of the first fixing block (4). A connecting groove (6) is opened on the right side of the top of the test bench (1). The fixing component (5) includes a base (51), the left side of the base (51) is fixedly connected to the right side of the first fixing block (4), a sleeve (52) is fixedly installed on the right side of the base (51), a tightening port (53) is fixedly connected to the front end of the sleeve (52), and a tightening nut (54) is threadedly connected to the outer surface of the sleeve (52). A scale plate (61) is fixedly installed on both sides of the connecting groove (6), and a scale strip (62) is provided on the opposite side of the scale plate (61). A lead screw (63) is rotatably connected inside the connecting groove (6), and a sliding block (64) is threadedly connected to the surface of the lead screw (63). A connecting plate (7) is fixedly connected to the top of the sliding block (64). A second fixing block (71) is fixedly connected to the left side of the connecting plate (7), a stepper motor (75) is provided on the right side of the connecting plate (7), and a rotating clamping cylinder (72) is provided on the left side of the second fixing block (71).

2. The high-precision tensile and torsional force testing device for power cords according to claim 1, characterized in that: A rotary motor (65) is provided on the right side of the test bench (1), and the output end of the rotary motor (65) is fixedly connected to one end of the lead screw (63).

3. The high-precision tensile and torsional force testing device for power cords according to claim 1, characterized in that: The two scale plates (61) have a sliding groove (66) on their opposite sides, and the connecting plate (7) has limit blocks on its front and rear sides. The connecting plate (7) is slidably connected to the sliding groove (66) through the limit blocks on both sides.

4. The high-precision tensile and torsional force testing device for power cords according to claim 1, characterized in that: Sensors are provided on opposite sides of the first fixing block (4) and the second fixing block (71).

5. The high-precision tensile and torsional force testing device for power cords according to claim 1, characterized in that: The rotating clamping cylinder (72) is provided with an arc-shaped clamping piece (73) inside. The rotating clamping cylinder (72) is symmetrically provided with a wire clamping knob (74) along the rotation axis. One end of the wire clamping knob (74) is fixedly connected to the back of the arc-shaped clamping piece (73).

6. The high-precision tensile and torsional force testing device for power cords according to claim 1, characterized in that: The output end of the stepper motor (75) is fixedly connected to a planetary gear reducer (76), and the output end of the planetary gear reducer (76) is fixedly connected to the rotation shaft of the rotating clamping cylinder (72).

7. The high-precision tensile and torsional force testing device for power cords according to claim 1, characterized in that: The electrical control box (2) is electrically connected to the stepper motor (75) and the rotary motor (65), and the electrical control box (2) also includes a control panel and a power switch.

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