Electrical connection cable length measuring device

Abstract

The application discloses an electric connection cable length measuring device, which comprises a support, a linear track, a driving device, a support shaft, a first fixed end and a second fixed end, wherein the linear track and the driving device are directly or indirectly fixed on the support, the first fixed end and / or the second fixed end are arranged on the support or the support shaft, a plurality of support shafts are directly or indirectly installed on the linear track so that the support shafts can move linearly along the linear track, the driving device can drive the support shafts to move along the linear track, the driving device or the linear track is provided with a position sensor or an angle sensor which can directly monitor the moving distance of the support shafts or calculate the moving distance of the support shafts through sensor data to further calculate the length of the measured electric connection cable, or a scale is arranged on the support to directly display the length of the measured electric connection cable when the support shaft is at a corresponding position. The length of the cable can be directly determined according to the position of the support shaft, the calculation precision is high, and the measurement is convenient.

Description

Technical Field

[0001] This application relates to the field of cable technology, and more particularly to equipment for measuring the length of electrical connection cables. Background Technology

[0002] Grounding wires are one of the most common electrical connection cables. Compared to other electrical connection cables, they are relatively short and require evaluation and testing before leaving the factory. Resistance is an important indicator for evaluating electrical connection cables, but measuring resistance requires measuring the length of the electrical connection cable. Especially for longer electrical connection cables, manual measurement will have errors. If equipment is used for measurement, it may require a longer piece of equipment and occupy a longer distance. Measuring by winding will also have some errors. In addition, the length of the electrical connection cable can be estimated based on its weight, but this will also have some errors.

[0003] Chinese patent application CN115164675B discloses a cable winding length measuring device, comprising: a main body, a winding assembly, a transmission assembly, a cable clamp, and a calculation assembly; the winding assembly includes: a winding drum, a transmission shaft, and a winding motor; the transmission assembly includes: a first gear, a second gear, a third gear, a connecting rod, and a connecting plate; the cable clamp includes: two clamping wheels and a sliding plate; the calculation assembly includes: a processor and a first counter; the first counter is used to calculate the number of rotations of the clamping wheels; the processor is used to calculate the length of the cable passing through the clamping wheels based on the number of rotations. The cable clamp can clamp the cable for cable winding; the winding assembly can wind the cable; the transmission assembly can synchronously drive the sliding plate to slide along the winding direction when the winding drum rotates; the calculation assembly can calculate the cable length based on the number of rotations of the clamping wheels during cable winding. Compared with manual cable length measurement, this method can effectively improve work efficiency, but the tightness of the winding will affect the accuracy of the length measurement, meaning that multiple measurements will yield different results, making it impossible to determine an accurate value. Utility Model Content

[0004] This application provides an electrical connection cable length measuring device to at least solve the technical problem of low accuracy in measuring the length of electrical connection cables in the prior art.

[0005] According to this application, an electrical connection cable length measuring device is provided, including a bracket, a linear track, a drive device, a support shaft, a first fixed end, and a second fixed end. The linear track and the drive device are directly or indirectly fixed on the bracket. The first fixed end and / or the second fixed end are disposed on the bracket or on the support shaft. Multiple support shafts are directly or indirectly installed on the linear track so that the support shafts can move linearly along the linear track. The drive device can drive the support shafts to move along the linear track. The drive device or the linear track is provided with a position sensor or an angle sensor that can directly monitor the movement distance of the support shaft or calculate the movement distance of the support shaft through sensor data to further calculate the length of the electrical connection cable to be measured. Alternatively, a scale or grating ruler can be set on the bracket to directly display the length of the electrical connection cable to be measured when the support shaft is in the corresponding position.

[0006] Compared with existing technologies, the electrical connection cable length measuring device of this application has the following advantages: When measuring the length of grounding wires or other electrical connection cables, the two ends of the grounding wire or other electrical connection cable are fixed to the first fixed end and the second fixed end, respectively. The middle section of the cable is then passed around each support shaft in sequence. The support shafts are moved by a drive device to straighten the grounding wire or other electrical connection cable. At this time, the length of the grounding wire or other electrical connection cable is distributed in a straight section and a semi-circular section. The length of the straight section can be determined according to the distance between the support shafts and the distance between the support shaft and the first fixed end or the second fixed end. The length of the semi-circular section is determined by the bending radius. For cables of the same model, this is a fixed value. Therefore, the length of the cable can be determined directly according to the position of the support shaft. This calculation method has high accuracy and is convenient for measurement.

[0007] In one embodiment, multiple support shafts are fixed on the same connecting slider, and a fixed shaft is set at one end of the bracket. The electrical connection cable to be tested is wrapped around one support shaft and then around one fixed shaft. By wrapping back and forth in this way, a longer electrical connection cable can be wrapped around a smaller device, so as to achieve accurate measurement of length.

[0008] In one embodiment, part of the support shaft is fixed on the first slider and part of the support shaft is fixed on the second slider. The first slider and the second slider are symmetrically arranged on a linear track. Under the action of the driving device, the first slider and the second slider move relative to each other or move away from each other along a straight line. This allows for bidirectional movement and stretching of the electrical connection cable, and the movement speed is faster than that of a single slider.

[0009] In one embodiment, the support shaft and the fixed shaft are provided with rollers, and the outer periphery of the rollers is provided with grooves, which can reduce the resistance to stretching the electrical connection cable and make the cable length measurement more accurate.

[0010] In one embodiment, an anti-detachment disc is provided on the front side of the roller, and the maximum outer diameter of the anti-detachment disc is larger than the maximum outer diameter of the roller, so as to prevent the cable from detaching from the roller.

[0011] In one embodiment, the linear track is arranged in a horizontal direction, and a panel is provided on the front side of the linear track. Rollers are located on the front side of the panel, and the first slider and the second slider are located on the rear side of the panel. The panel is provided with a groove corresponding to the support shaft, so that the support shaft can move linearly in the groove. The panel can isolate the electrical connection cable being tested, and prevent the electrical connection cable from being pulled and wrapped around other structures, thus affecting the length test.

[0012] In one embodiment, the first fixed end and the second fixed end are located on the front side of the panel. The height of the first fixed end in the horizontal direction is higher than the height of the uppermost support shaft, and the height of the second fixed end is lower than the height of the lowermost support shaft. The height difference between the center of the first fixed end and the center of the support shaft is the sum of the diameter of the roller and the diameter of the electrical connection cable. The height difference between the center of the second fixed end and the center of the support shaft is the sum of the diameter of the roller and the diameter of the electrical connection cable. The height difference between the centers of adjacent support shafts on the same side is the sum of the diameters of the two rollers and the diameters of the two electrical connection cables.

[0013] In one embodiment, the linear track includes an upper track and a lower track. The upper track is located at the top of the panel, and the lower track is located at the bottom of the panel. Both ends are equipped with stabilized sliders to prevent test deviations caused by asynchronous movement of the sliders.

[0014] In one embodiment, a first threaded sleeve is provided at the center of the first slider, and a first lead screw is provided inside the first threaded sleeve. A second threaded sleeve is provided at the center of the second slider, and a second lead screw is provided inside the second threaded sleeve. The first lead screw and the second lead screw are coaxially arranged and connected by a connecting shaft, so that synchronous rotation can be achieved and the length can be accurately calculated.

[0015] In one embodiment, the drive device is equipped with a geared motor, which drives the connecting shaft through a synchronous toothed belt, chain, or gear meshing. This enables synchronous rotation and avoids positional errors caused by transmission, which could lead to errors in length measurement.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 This application illustrates the structural composition of the electrical connection cable length measuring device according to Embodiment 1. Figure 1 ; Figure 2 This application illustrates the structural composition of the electrical connection cable length measuring device according to Embodiment 1. Figure 2 ; Figure 3 A schematic diagram of the support shaft of the electrical connection cable length measuring device according to Embodiment 1 of this application is shown; Figure 4 This paper shows a schematic diagram of the support shaft installation of the electrical connection cable length measuring device according to Embodiment 1 of this application; Figure 5 A schematic diagram of the composition structure of the electrical connection cable length measuring device according to Embodiment 2 of this application is shown; Figure 6 It shows Figure 5 Enlarged view of point A in the middle; Figure 7 A schematic diagram of the composition structure of the electrical connection cable length measuring device of Embodiment 3 of this application is shown.

[0019] Explanation of the labels in the diagram: 1. Bracket; 2. Linear rail; 3. Drive unit; 4. Support shaft; 5. First fixed end; 6. Second fixed end; 7. Scale; 8. Pointer; 9. Electrical connection cable; 10. Roller; 11. Panel; 12. Display screen; 13. Control button; 14. Slide groove; 15. Cable post; 16. Fixed shaft; 20. Connecting slider; 21. First slider; 22. Second slider; 23. Upper rail; 24. Lower rail; 25. First threaded sleeve; 26. Second threaded sleeve; 27. First lead screw; 28. Second lead screw; 29. ​​Connecting shaft; 30. Gear motor; 31. Synchronous toothed belt; 40. Roller; 41. Anti-detachment disc; 42. Cable groove; 43. Nut; 44. Ball bearing. Detailed Implementation

[0020] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Example 1: like Figure 1 and Figure 2 As shown, the electrical connection cable length measuring device includes a bracket 1, a linear track 2, a drive device 3, a support shaft 4, a first fixed end 5, and a second fixed end 6. The linear track 2 and the drive device 3 are directly or indirectly fixed to the bracket 1. The first fixed end 5 and the second fixed end 6 are mounted on the bracket 1. In some embodiments, the first fixed end 5 and the second fixed end 6 can be mounted on the support shaft 4, but the support shaft 4 requires a fixed structure, which is more complex and is usually not used. For grounding wires, screws can be used for fixing, which is more troublesome than a handle-type fastening method. Multiple support shafts 4 are directly or indirectly mounted on the linear track 2, allowing the support shafts 4 to move linearly along the linear track 2. The drive device 3 can drive the support shafts 4 to move along the linear track 2. The drive device 3 or the linear track 2 is equipped with a position sensor or an angle sensor to directly monitor the movement distance of the support shaft 4 or calculate the movement distance of the support shaft 4 through sensor data to further calculate the length of the electrical connection cable 9 being measured. The winding method of the electrical connection cable 9 is as follows. Figure 1 As shown, it is necessary to start from the first fixed end 5 and sequentially bypass each support shaft 4 to reach the second fixed end.

[0022] The bracket 1 can be constructed from sheet metal or tubing. Roller wheels 10 are provided at the bottom of the bracket 1 for easy movement. Since it is for length measurement, the bracket 1 can be placed horizontally, vertically, or upside down without affecting the length measurement. This embodiment is described using the direction indicated in the figure. The linear track 2 can be a linear guide rail, which will be matched with a corresponding slider. However, each slider can only mount one support shaft 4. Multiple support shafts 4 require multiple sliders, thus necessitating the installation of numerous drive devices 3. To simplify the setup, a first slider 21 and a second slider 22 can be designed to fix multiple support shafts 4. Threaded holes are provided in the first slider 21 and the second slider 22 so that the support shafts 4 are fixed to the first slider 21 and the second slider 22 by nuts 43.

[0023] In one embodiment, the linear track 2 is provided with a first slider 21 and a second slider 22. A portion of the support shaft 4 is fixed to the first slider 21, and another portion is fixed to the second slider 22. The first slider 21 and the second slider 22 are symmetrically arranged on the linear track 2, and under the action of the driving device 3, the first slider 21 and the second slider 22 move relative to each other or move away from each other along a straight line. Figure 1 In the middle, six support shafts 4 on the right side are fixed on the first slider 21, and seven support shafts 4 on the left side are fixed on the second slider 22. When the first fixed end 5 and the second fixed end 6 are set on the left and right sides of the panel 11, the number of support shafts 4 on the left and right sides is the same.

[0024] like Figure 3As shown, in one embodiment, the support shaft 4 and the fixed shaft are provided with rollers 40. The outer periphery of the rollers 40 is provided with concave grooves 42. In order to accommodate the length measurement of electrical connection cables 9 with different radii, the concave grooves 42 can be formed by two conical surfaces. The rollers 40 are provided with ball bearings 44 to reduce the rolling resistance of the rollers 40. The support shaft 4 is installed on the first slider 21 or the second slider 22 by a nut 43.

[0025] like Figure 3 As shown, in one embodiment, an anti-detachment disc 41 is provided on the front side of the roller 40, and the maximum outer diameter of the anti-detachment disc 41 is greater than the maximum outer diameter of the roller 40.

[0026] like Figure 1 and Figure 2 As shown, in one embodiment, the linear track 2 is arranged horizontally, and a panel 11 is provided on the front side of the linear track 2. Rollers 40 are located on the front side of the panel 11, and a first slider 21 and a second slider 22 are located on the rear side of the panel 11. The panel 11 is provided with a groove 14 corresponding to the support shaft 4, allowing the support shaft 4 to move linearly within the groove 14. A cable post 15 is provided at the center of the panel 11, which can initially limit the cable when measuring the winding cable.

[0027] like Figure 1 and Figure 2 As shown, in one embodiment, the first fixed end 5 and the second fixed end 6 are located on the front side of the panel 11. The horizontal height of the first fixed end 5 is higher than the height of the uppermost support shaft 4, and the height of the second fixed end 6 is lower than the height of the lowermost support shaft 4. The height difference between the center of the first fixed end 5 and the center of the support shaft 4 is the sum of the diameter of the roller 40 and the diameter of the electrical connection cable 9. The height difference between the center of the second fixed end 6 and the center of the support shaft 4 is the sum of the diameter of the roller 40 and the diameter of the electrical connection cable 9. The height difference between the centers of adjacent support shafts 4 on the same side is the sum of the diameters of the two rollers 40 and the diameters of the two electrical connection cables 9. When measuring electrical connection cables 9 of different diameters, there will be some error. Embodiment 2 provides a more accurate calculation method for electrical connection cables 9 of different diameters.

[0028] like Figure 2 and Figure 4 As shown, in one possible embodiment, the linear track 2 includes an upper track 23 and a lower track 24. The upper track 23 is disposed at the upper end of the panel 11, and the lower track 24 is disposed at the lower end of the panel 11. The linear track 2 can be purchased directly according to its size and model. Two upper tracks 23 and two lower tracks 24 can be provided, distributed on the left and right sides.

[0029] In one embodiment, a first threaded sleeve 25 is provided at the center of the first slider 21, and a first lead screw 27 is provided inside the first threaded sleeve 25. A second threaded sleeve 26 is provided at the center of the second slider 22, and a second lead screw 28 is provided inside the second threaded sleeve 26. The first lead screw 27 and the second lead screw 28 are coaxially arranged and connected by a connecting shaft 29. The connecting shaft 29 is connected to the first lead screw 27 and the second lead screw 28 through a coupling. Alternatively, the connecting shaft 29, the first lead screw 27, and the second lead screw 28 can be integrally machined from the same blank, but the assembly requires the use of larger bearings.

[0030] In one embodiment, the drive device 3 is equipped with a geared motor 30, which can be directly purchased, i.e., it includes a motor and a reduction gear set. The geared motor 30 is mounted on the bracket 1, and the geared motor 30 and the connecting shaft 29 are driven by a synchronous toothed belt 31, a chain or gear meshing.

[0031] Example 2: like Figure 5 As shown, a scale 7 or grating ruler is set on the bracket 1 to directly display the length of the electrical connection cable 9 being measured when the support shaft 4 is in the corresponding position. A pointer 8 is set on the support shaft 4, which can be read manually without complex calculations. However, this method is only applicable to specific models of electrical connection cables 9. If the diameter of the electrical connection cable 9 is different, a simple calculation using the Pythagorean theorem is required. Therefore, for applications requiring higher precision, a display screen 12, control buttons 13, and a processor can be set on the panel 11. The control buttons 13 can input the length of the electrical connection cable 9, and the processor can obtain data from the position sensor or angle sensor and use this data to confirm the horizontal distance L of the support shaft 4 on the left and right sides. The horizontal distances from the first fixed end 5 and the second fixed end 6 to the support shaft 4 on the farthest side are L1 and L2, respectively. The radius of the roller 40 is R. The standard electrical connection cable 9 has a radius of R1. When testing the standard electrical connection cable 9, it is horizontal directly on each support shaft 4. The actual radius of the electrical connection cable 9 is R2. When R1 ≠ R2, there will be a certain tilt angle when measuring the actual electrical connection cable 9. The number of support shafts 4 is N. When measuring the length of the electrical connection cable 9, inputting R2 will allow you to use the Pythagorean theorem to obtain the length C of the electrical connection cable 9. The specific calculation is as follows: C= + +(N-1)× +Nπ(R+R2), where R, N, and R1 are constant values, and L, L1, and L2 can be obtained directly from the sensor or through calculation.

[0032] Example 3: like Figure 6As shown, in one embodiment, multiple support shafts 4 are fixed on the same connecting slider 20, and multiple fixed shafts 16 are provided at one end of the bracket 1. During measurement, the electrical connection cable 9 passes around the fixed shaft 16 from the first fixed end 5 and then passes around the support shaft 4, that is, passes around different shafts in sequence to reach the second fixed end 6. The electrical connection cable 9 can also pass around the support shaft 4 from the first fixed end 5 and then pass around the fixed shaft 16, that is, passes around different shafts in sequence to reach the second fixed end 6.

[0033] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electrical connection cable length measuring device, characterized by: The system includes a bracket (1), a linear track (2), a drive device (3), a support shaft (4), a first fixed end (5), and a second fixed end (6). The linear track (2) and the drive device (3) are directly or indirectly fixed to the bracket (1). The first fixed end (5) and / or the second fixed end (6) are disposed on the bracket (1); or the first fixed end (5) and / or the second fixed end (6) are disposed on the support shaft (4). Multiple support shafts (4) are directly or indirectly installed on the linear track (2) so that the support shaft (4) can move along the linear track (2) in a straight line. The drive device (3) can drive the support shaft (4) to move along the straight track (2). The drive device (3) or the straight track (2) is equipped with a position sensor that can directly monitor the moving distance of the support shaft (4); or, the drive device (3) or the straight track (2) is equipped with an angle sensor, and the moving distance of the support shaft (4) is calculated through the sensor data to further calculate the length of the electrical connection cable (9) to be measured; or a scale (7) or grating ruler is set on the bracket (1) to directly display the length of the electrical connection cable (9) to be measured when the support shaft (4) is in the corresponding position.

2. The electrical connection cable length measuring device of claim 1, wherein: Multiple support shafts (4) are fixed on the same connecting slider (20), and a fixed shaft (16) is provided at one end of the bracket (1).

3. The electrical connection cable length measuring apparatus of claim 1, wherein: Part of the support shaft (4) is fixed on the first slider (21), and part of the support shaft (4) is fixed on the second slider (22). The first slider (21) and the second slider (22) are symmetrically arranged on the linear track (2), and the first slider (21) and the second slider (22) move relative to each other or move away from each other along a straight line under the action of the driving device (3).

4. The electrical connection cable length measuring apparatus of claim 3, wherein: The first slider (21) has a first threaded sleeve (25) at its center, and a first lead screw (27) is provided inside the first threaded sleeve (25). The second slider (22) has a second threaded sleeve (26) at its center, and a second lead screw (28) is provided inside the second threaded sleeve (26). The first lead screw (27) and the second lead screw (28) are coaxially arranged and connected by a connecting shaft (29).

5. The electrical connection cable length measuring apparatus of claim 4, wherein: The support shaft (4) and the fixed shaft (16) are provided with rollers (40), and the outer periphery of the rollers (40) is provided with grooves (42).

6. The electrical connection cable length measuring apparatus of claim 5, wherein: The roller (40) is provided with an anti-detachment disc (41) on its front side, and the maximum outer diameter of the anti-detachment disc (41) is greater than the maximum outer diameter of the roller (40).

7. The electrical connection cable length measuring apparatus of claim 6, wherein: The linear track (2) is arranged in a horizontal direction. A panel (11) is provided on the front side of the linear track (2). The roller (40) is located on the front side of the panel (11). The first slider (21) and the second slider (22) are located on the rear side of the panel (11). The panel (11) is provided with a groove (14) corresponding to the support shaft (4) so ​​that the support shaft (4) can move linearly in the groove (14).

8. The electrical connection cable length measuring apparatus of claim 7, wherein: The first fixed end (5) and the second fixed end (6) are located on the front side of the panel (11). The height of the first fixed end (5) in the horizontal direction is higher than the height of the uppermost support shaft (4), and the height of the second fixed end (6) is lower than the height of the lowermost support shaft (4). The height difference between the center of the first fixed end (5) and the center of the support shaft (4) is the sum of the diameter of the roller (40) and the diameter of the electrical connection cable (9). The height difference between the center of the second fixed end (6) and the center of the support shaft (4) is the sum of the diameter of the roller (40) and the diameter of the electrical connection cable (9). The height difference between the centers of adjacent support shafts (4) on the same side is the sum of the diameters of the two rollers (40) and the diameters of the two electrical connection cables (9).

9. The electrical connection cable length measuring device according to any one of claims 7 or 8, characterized in that: The linear track (2) includes an upper track (23) and a lower track (24). The upper track (23) is located at the upper end of the panel (11), and the lower track (24) is located at the lower end of the panel (11).

10. The electrical connection cable length measuring apparatus of claim 9, wherein: The drive device (3) is equipped with a geared motor (30), and the geared motor (30) and the connecting shaft (29) are driven by a synchronous toothed belt (31), chain or gear meshing.

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