A cable detection auxiliary device and a cable detection apparatus

Abstract

This utility model discloses a cable testing auxiliary device and cable testing equipment, used in the field of cable quality testing technology. The device includes a winding mechanism and a conductive clamping mechanism. The winding mechanism includes a fixed frame, a test lead, a winding reel, a first conductive block, and a second conductive block. The fixed frame is fixedly connected to the clamping mechanism. The winding reel is rotatably mounted on the fixed frame and has a connecting through hole. One end of the connecting through hole is located at the end of the winding reel, and the other end is located on the winding wall of the winding reel. The first conductive block is rotatably engaged in the connecting through hole, located near the end of the winding reel, and connected to a connecting lead, which is electrically connected to the clamping mechanism. The second conductive block is rotatably engaged in the connecting through hole, abutting against the first conductive block, and connected to the test lead, which can be wound onto the winding reel. Both the connecting lead and the test lead can rotate independently, preventing cable entanglement.

Description

Technical Field

[0001] This utility model relates to the field of cable quality testing technology, and in particular to a cable testing auxiliary device and cable testing equipment. Background Technology

[0002] Cables are rope-like wires made of several or groups of conductors twisted together, with each group of conductors insulated from each other and twisted around a central core. The entire cable is covered with a highly insulating outer layer and is used to transmit electricity or information. It is an important component of the power grid system. Therefore, it is crucial to prevent defective cables from entering the network, and cable quality testing is of paramount importance.

[0003] In existing technologies, high-precision multi-parameter field testers for coiled cables connect to both ends of the cable via an additional test lead for cable resistance testing. However, during post-installation cable re-inspection, the cable's position is fixed, requiring a long test lead to connect both ends. To avoid inconvenience in use, organization, and storage due to excessively long leads, existing technologies have disclosed an adjustable cable fault detection clip (CN219737674U). This clip uses a take-up box and cable clamping structure for fixation. However, the take-up box and cable clamp are relatively independent, making them prone to relative rotation during use. The cable clamp is fixedly connected to one end of the test lead, while the other end is wound into the take-up box. Since one end of the test lead is fixed, the other end easily rotates during testing, causing the entire test lead to twist and tangle, affecting normal use. Utility Model Content

[0004] This utility model provides a cable testing auxiliary device and cable testing equipment, which aims to solve the problem that test wires are easily twisted and tangled in the prior art.

[0005] The first aspect of this utility model provides a cable testing auxiliary device, including a winding mechanism and a clamping mechanism;

[0006] The winding mechanism includes a fixed frame, a test lead, a winding wheel, a connecting lead, a conductive block one, and a conductive block two;

[0007] The fixing frame is fixedly connected to the clamping mechanism;

[0008] The winding wheel is rotatably mounted on the fixed frame. The winding wheel is provided with a connecting through hole. One end of the connecting through hole is located at the end of the winding wheel, and the other end of the connecting through hole is located at the winding wall of the winding wheel.

[0009] The conductive block is rotatably engaged in the connecting through hole. The conductive block is arranged near the end of the winding wheel. The conductive block is connected to the connecting wire, and the connecting wire is electrically connected to the clamping mechanism.

[0010] The second conductive block is rotatably engaged in the connecting through hole. The second conductive block abuts against the first conductive block and is connected to the test lead. The test lead can be wound onto the winding wheel.

[0011] In some embodiments of the first aspect, the connecting through hole is a straight through hole or an arc-shaped through hole.

[0012] In some embodiments of the first aspect, the connecting through hole is the arc-shaped through hole, and along the direction from the winding wall of the winding wheel to the end of the winding wheel, the connecting through hole includes a first diameter segment, a second diameter segment and a third diameter segment connected in sequence;

[0013] The axis of the first aperture segment is an arc-shaped axis, and the axes of the second aperture segment and the third aperture segment are both in the same direction as the axis of the winding wheel;

[0014] The first aperture section matches the shape of the test lead, and the first aperture section is used for the test lead to pass through;

[0015] The second aperture segment matches the shape of the second conductive block, and the second aperture segment is used for elastic insertion and engagement with the second conductive block, and allows the second conductive block to rotate around the axis of the second aperture segment;

[0016] The third aperture segment matches the shape of the first conductive block. The third aperture segment is used to engage the first conductive block and allows the first conductive block to rotate around the axis of the third aperture segment. The first conductive block is used to restrict the movement of the second conductive block in the direction of the third aperture segment, so as to engage the second conductive block in the second aperture segment.

[0017] In some embodiments of the first aspect, the aperture of the first aperture segment is smaller than the aperture of the second aperture segment, and an annular step is formed at the connection between the first aperture segment and the second aperture segment;

[0018] A compression spring is compressed between the second conductive block and the step, and the compression spring is used to keep the second conductive block moving in the direction of the first conductive block.

[0019] In some embodiments of the first aspect, the inner peripheral wall of the third aperture segment is provided with a groove, and the outer peripheral wall of the first conductive block is provided with an outer edge. The third aperture segment, the groove, the outer edge and the first conductive block are all arranged coaxially, and the outer edge is located in the groove.

[0020] In some embodiments of the first aspect, the fixing frame includes a pair of connecting ears, the connecting ears being provided with through holes;

[0021] The winding wheel is arranged between the two connecting lugs. The end of the winding wheel is an end shaft, which passes through the lug through hole. The end face of the end shaft is provided with the opening of the connecting through hole.

[0022] In some embodiments of the first aspect, the winding mechanism further includes a spring sleeved around the end shaft, one end of the spring being connected to the fixed frame and the other end being connected to the winding wheel.

[0023] In some embodiments of the first aspect, the clamping mechanism is a tiger-mouth clamp.

[0024] In some embodiments of the first aspect, a conductive sheet is fixed on the clamping surface of the thumb clamp, and the conductive sheet is electrically connected to the connecting wire.

[0025] The second aspect of this utility model provides a cable testing device, comprising: a cable testing auxiliary device as described in any one of the first aspects, wherein the cable testing auxiliary device is used to clamp the cable to be tested;

[0026] The testing device includes a cable testing auxiliary device, one pole of which is connected to the cable under test, and the other pole of which is connected to the test lead of the cable testing auxiliary device.

[0027] As can be seen from the above technical solutions, this utility model has the following advantages:

[0028] This embodiment provides a cable testing auxiliary device. Since the winding mechanism and clamping mechanism are fixedly connected and cannot rotate freely, the clamping mechanism secures the cable, while the winding mechanism allows for the winding and unwinding of the test lead. The usable length of the test lead can be adjusted to meet the testing needs of cables of different lengths in different scenarios, providing convenience for the use, organization, and storage of the test lead. Furthermore, since the connecting wire of the clamping mechanism is connected to conductive block one, and one end of the test lead is connected to conductive block two, both conductive blocks one and two can be rotatably positioned within the connecting through-hole, and conductive block one abuts against conductive block two, both the connecting wire and the test lead can rotate independently. Both ends of the test lead can rotate relative to each other, achieving electrical connection even under rotation. Even if the test lead rotates independently, cable tangling will not occur, completely solving the problem of test leads easily twisting and tangling in the prior art. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of a cable testing auxiliary device provided in the first aspect of the present invention;

[0031] Figure 2 Schematic cross-sectional structure of the winding mechanism provided in the first aspect of the present invention Figure 1 ;

[0032] Figure 3 A partial structural schematic diagram of the winding mechanism provided in the first aspect of the present utility model;

[0033] Figure 4 Schematic cross-sectional structure of the winding mechanism provided in the first aspect of the present invention Figure 2 ;

[0034] Figure 5 This is a schematic diagram of the overall structure of the cable testing equipment provided in the second aspect of the present utility model.

[0035] Figure label:

[0036] 1. Winding mechanism; 10. Fixing frame; 100. Connecting ear; 101. Housing; 102. Guide wheel; 11. Test lead; 12. Winding wheel; 120. Connecting through hole; 1200. First aperture section; 1201. Second aperture section; 1202. Third aperture section; 13. Conductive block one; 14. Conductive block two; 15. Connecting lead; 16. Compression spring; 17. Clock spring; 2. Clamping mechanism; 20. Conductive sheet; 21. First clamping body; 22. Second clamping body; 3. Detection device; 4. Cable to be tested. Detailed Implementation

[0037] This utility model provides a cable testing auxiliary device and cable testing equipment to solve the problem of test wires being easily twisted and tangled in the prior art.

[0038] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0039] Please see Figures 1 to 4 The first aspect of this utility model provides a cable testing auxiliary device, which includes a winding mechanism 1 and a conductive clamping mechanism 2.

[0040] The winding mechanism 1 includes a fixed frame 10, a test lead 11, a winding wheel 12, a first conductive block 13, and a second conductive block 14;

[0041] The fixing frame 10 is fixedly connected to the clamping mechanism 2;

[0042] The winding wheel 12 is rotatably mounted on the fixed frame 10. The winding wheel 12 is provided with a connecting through hole 120. One end of the connecting through hole 120 is located at the end of the winding wheel 12, and the other end of the connecting through hole 120 is located on the winding wall of the winding wheel 12.

[0043] The conductive block 13 is rotatably mounted in the connecting through hole 120. The conductive block 13 is arranged near the end of the winding wheel 12. The conductive block 13 is connected to the connecting wire 15, which is electrically connected to the clamping mechanism 2.

[0044] The second conductive block 14 is rotatably mounted in the connecting through hole 120. The second conductive block 14 abuts against the first conductive block 13. The second conductive block 14 is connected to the test lead 11. The test lead 11 can be wound onto the winding wheel 12.

[0045] In the operation of this embodiment, the clamping mechanism 2 clamps one end of the cable to be tested, and then the test lead 11 is pulled out from the winding wheel 12. The free end of the test lead 11 is connected to the instrument used to test the cable, so that the cable to be tested, the clamping mechanism 2, the connecting lead 15, the first conductive block 13, the second conductive block 14, the test lead 11, and the instrument form a closed loop for subsequent quality testing of the cable to be tested.

[0046] As can be seen from the above working process, during the pulling out process, since the test lead 11 is electrically connected to the conductive block 2 14 and the conductive block 13 is electrically connected to the connecting lead 15, the conductive block 13 and the conductive block 2 14 are in contact, and the conductive block 13 and the conductive block 2 14 can rotate within the connecting through hole 120, both ends of the test lead 11 can rotate. Even if it rotates arbitrarily, the test lead 11 can maintain electrical connection and will not cause cable entanglement, thus completely solving the problem of the test lead 11 being easy to twist and entangle in the prior art.

[0047] It should be noted that the detection path formed by conductive block 13 and conductive block 2 14 involves mechanical friction between them. Whether lubricating oil is applied to reduce friction or friction is carried out directly without oil, the resistance value generated by both can be measured in advance before measuring the cable under test. This value can be used as a known resistance value to avoid affecting the resistance of the cable under test when measuring it later.

[0048] Compared with the prior art, the advantages of this embodiment are as follows: First, the overall structure is well integrated. In this embodiment, the winding mechanism 1 and the clamping mechanism 2 are connected and fixed. When the whole is stored, it is not easy to loosen. In contrast, the prior art separates the winding mechanism 1 and the clamping mechanism 2 and arranges them independently. They are easy to disperse during storage, especially during storage and transportation. Due to vibration, the two parts move relative to each other, causing the connecting wires to loosen and requiring subsequent tidying. Second, the possibility of cable tangling during electrical connection is low. Since the body and both ends of the test lead 11 can rotate, and the body and both ends of the connecting lead 15 can also rotate, the test lead 11 will not tangle even if it rotates after being pulled out, ensuring the reliability and stability of the electrical connection. Third, it is convenient to use. The cable can be fixed by clamping the cable with the clamping mechanism 2, and the test lead 11 can be wound up and unwound by the winding mechanism 1. The length of the test lead 11 can be adjusted to meet the testing needs of cables of different lengths under different scenarios, providing convenience for the use, tidying and storage of the test lead 11.

[0049] In one specific embodiment, such as Figure 4As shown, a feasible structure for the winding wheel 12 is further provided. The connecting through hole 120 of the winding wheel 12 is a straight through hole or an arc-shaped through hole. That is, the entire connecting through hole 120 is inclined in a straight line or an arc in the direction from the winding wall of the winding wheel 12 to the end of the winding wheel 12. In specific implementation, the straight connecting through hole 120 can provide a regular guiding path for the test lead 11. The test lead 11 has less friction in the straight through hole and the test lead 11 has a good rotation effect. When the connecting through hole 120 is an arc-shaped through hole, the arc-shaped through hole can provide good buffer for the test lead 11, making the rotation of the arc-shaped through hole smoother and avoiding the problem of entanglement caused by excessive rotation speed.

[0050] In one embodiment, such as Figure 4 As shown, a feasible structure is further provided when the connecting through hole 120 is an arc-shaped through hole. Along the direction from the winding wall of the winding wheel 12 to the end of the winding wheel 12, the connecting through hole 120 sequentially includes a first aperture section 1200, a second aperture section 1201, and a third aperture section 1202. The first aperture section 1200 is used for the test lead 11 to pass through, that is, the test lead 11 passes through the first aperture section 1200. The second aperture section 1201 matches the shape of the conductive block 14 and is used to accommodate the conductive block 14. The conductive block 14 is elastically inserted into the second aperture section 1201 and is allowed to rotate around the axis of the second aperture section 1201, that is, the conductive block 14 can be rotatably locked within the second aperture section 1201. The third aperture section 1202... 202 is shaped to match conductive block 13. The third aperture section 1202 is used to snap conductive block 13 into place and allows conductive block 13 to rotate around the axis of the third aperture section 1202. Conductive block 13 can be rotatably snapped into the third aperture section 1202. Conductive block 13 is used to restrict the axial movement of conductive block 2 14 in the direction of the third aperture section 1202 so that conductive block 2 14 can be snapped into the second aperture section 1201. In specific assembly, the test wire 11 is first inserted into the first aperture section 1200, then conductive block 2 14 is placed in the second aperture section 1201, and finally conductive block 13 is snapped into the third aperture section 1202. With this setting method, each component can be effectively positioned, reducing the shaking of each component and improving the accuracy of device installation and the stability of use.

[0051] In this embodiment, as Figure 4As shown, in order to further avoid the test lead 11 from tangling, the axis of the first aperture section 1200 is an arc-shaped axis. The axes of the second aperture section 1201 and the third aperture section 1202 are in the same direction as the axis of the winding wheel 12. That is, the entire connecting through hole 120 is arc-shaped inclined from the winding wall of the winding wheel 12 to the end of the winding wheel 12. The arc-shaped first aperture section 1200 can smoothly transition with the straight second aperture section 1201 and the third aperture section 1202. When the test lead 11 rotates, the arc-shaped open first aperture section 1200 provides a certain amount of space for the rotation of the test lead 11. The rotation of the test lead 11 can drive the conductive block 14 to rotate, thereby realizing the arbitrary rotation of the test lead 11.

[0052] In another embodiment, a feasible structure is further provided when the connecting through hole 120 is a straight through hole. Along the direction from the winding wall of the winding wheel 12 to the end of the winding wheel 12, the connecting through hole 120 sequentially includes a first aperture segment 1200, a second aperture segment 1201, and a third aperture segment 1202. The first aperture segment 1200, the second aperture segment 1201, and the third aperture segment 1202 are all straight aperture segments. The opening of the first aperture segment 1200 is located on the winding of the winding wheel 12. On the wall, the opening of the third aperture section 1202 is located at the end of the winding wheel 12; the first aperture section 1200 is used for the test lead 11 to pass through, that is, the test lead 11 passes through the first aperture section 1200; the second aperture section 1201 matches the shape of the conductive block 2 14, and the conductive block 2 14 is rotatably locked in the second aperture section 1201; the third aperture section 1202 matches the shape of the conductive block 13, and the conductive block 13 is rotatably locked in the third aperture section 1202.

[0053] Based on the above embodiments, such as Figure 4 As shown, a snap-fit ​​method for conductive block 13 is further provided. The inner peripheral wall of the third aperture section 1202 is provided with a groove, and the outer peripheral wall of conductive block 13 is provided with an outer edge. The third aperture section 1202, the groove, the outer edge and the conductive block 13 are all arranged coaxially. The connection between the third aperture section 1202 and the conductive block 13 is configured such that the outer edge is rotatably disposed in the groove. In specific implementation, conductive block 13 can be snapped into the third aperture section 1202 of the connecting through hole 120 in a rotatable manner.

[0054] Based on the above embodiments, such as Figure 4As shown, a flexible insertion method for the conductive block 14 is further provided. The diameter of the first aperture segment 1200 is smaller than that of the second aperture segment 1201. An annular step is formed at the connection between the first aperture segment 1200 and the second aperture segment 1201. The conductive block 14 is disposed between the step and the conductive block 13. A compression spring 16 is compressed between the conductive block 14 and the step. The compression spring 16 is sleeved on the outside of the test lead 11. The compression spring 16 is used to keep the conductive block 14 moving towards the conductive block 13. In specific implementation, since the conductive block 13 is snapped into the third aperture segment 1202, the compressed compression spring 16 can make the conductive block 14 press tightly against the conductive block 13, so that the conductive block 14 can be snapped into the second aperture segment 1201 of the connecting through hole 120 in a rotatable manner.

[0055] It should be noted that a spacer is provided at the contact position between the compression spring 16 and the conductive block 14, specifically a spacer made of insulating material.

[0056] In one specific embodiment, cable materials for the test wire 11 and the connecting wire 15 are further provided. The test wire 11 is a flexible cable, which can further reduce the possibility of tangling. The portion of the flexible cable located within the connecting through hole 120 has sufficient length, while the connecting wire 15 is a rigid wire, which can achieve good contact between the clamping mechanism 2 and the conductive block 13.

[0057] In one embodiment, a conductor is fixedly connected to the free end of the test lead 11. The conductor has a sheet-like structure. When connected to the detection device, the test lead 11 is connected to the clamp of the detection device through the conductor.

[0058] In one specific embodiment, such as Figure 2 and Figure 3 As shown, a feasible structure for connecting the winding wheel 12 to the fixing frame 10 is further provided. The fixing frame 10 includes a pair of oppositely arranged connecting ears 100, each with an ear through hole. The winding wheel 12 is arranged between the two connecting ears 100. The end of the winding wheel 12 is an end shaft, which passes through the ear through hole. The end face of the end shaft has an opening of a connecting through hole 120. In specific implementation, the winding wheel 12 can rotate around the end shaft on the fixing frame 10 to wind up the test lead 11, and the connecting lead 15 can be connected to the conductive block 13 through the opening of the connecting through hole 120 on the end shaft.

[0059] In one embodiment, such as Figures 3 to 4As shown, in order to improve the winding efficiency of the winding wheel 12, the winding mechanism 1 further includes a clockwork spring 17. The clockwork spring 17 is sleeved outside the end shaft. One end of the clockwork spring 17 is connected to the fixed frame 10, and the other end of the clockwork spring 17 is connected to the winding wheel 12. In specific implementation, when paying out the wire, the test wire 11 can be paid out by pulling it; when taking in the wire, the test wire 11 is relaxed, and through the elastic force of the clockwork spring 17, the test wire 11 can be automatically wound up, thus providing convenience for the use, arrangement and storage of the test wire 11.

[0060] Based on the above embodiments, in one embodiment, as Figures 2 to 4 shown, in order to protect the test wire 11 and the connecting wire 15, the fixed frame 10 further includes a housing 101. The housing 101 is fixedly connected to the clamping mechanism 2 through a side seat. The housing 101 is fixedly connected to the connecting ear 100. The housing 101 is also provided with a plurality of through holes for the test wire 11 and the connecting wire 15 to pass through. In specific implementation, the housing 101 can protect the test wire 11 and the connecting wire 15 from the outside influence.

[0061] In this embodiment, as Figure 2 shown, a guiding column is further provided inside the housing 101, and a guide wheel 102 is provided on the guiding column. The guiding column is arranged adjacent to the through hole of the housing 101 for the test wire 11 to pass through. In specific implementation, the test wire 11 bypasses the guide wheel 102 and passes through the through hole to be connected to the outside.

[0062] In a specific embodiment, as Figure 1 shown, the realizable structure of the clamping mechanism 2 is further provided. The clamping mechanism 2 is a conductive tiger mouth clamp. In specific implementation, one end of the cable is clamped inside the tiger mouth clamp, and the other end of the cable is connected to the test wire 11 to complete the preparation for detection.

[0063] In one embodiment, as Figure 1 shown, the clamping mechanism 2 includes a first clamp body 21 and a second clamp body 22; the first clamp body 21 includes a first frame, a second frame and a third frame which are sequentially connected to form a "C"-shaped accommodating space; a screw through hole is provided on the first frame, the second frame is bolted to the housing 101, and the second clamp body 22 is screwed into the accommodating space through the screw through hole. The second clamp body 22 and the third frame form a clamping mouth for clamping the cable to be tested. In specific implementation, the cable is placed between the second clamp body 22 and the third frame, and the second clamp body 22 is rotated to clamp the cable between the second clamp body 22 and the third frame.

[0064] In this embodiment, a guide rail is further provided on the second frame, and a guide hole corresponding to the guide rail is provided on the second clamp body 22. In specific implementation, the second clamp body 22 can slide up and down along the guide rail of the second frame.

[0065] In this embodiment, the second clamp 22 includes a clamp body and a connecting rod; one end of the connecting rod passes through a screw hole into the receiving space, and the other end of the connecting rod is connected to a lever. The connecting rod is screwed into the screw hole, the clamp body is disposed in the receiving space, and the clamp body and the connecting rod are movably connected by a bearing.

[0066] Based on the above embodiments, in order to improve the cable clamping effect, a first slot is provided on the side of the clamp body adjacent to the clamping opening, and a second slot is provided on the side of the third frame adjacent to the clamping opening. When the clamping opening is closed, the first slot and the second slot together form a mounting hole that abuts against the outer wall of the first cable to be tested.

[0067] In this embodiment, as Figure 1 As shown, a conductive sheet 20 is fixed on the clamping surface of the tiger mouth clamp. The conductive sheet 20 is electrically connected to the connecting wire 15. That is, the surface of the clamping mouth is provided with a conductive sheet 20, which enables the connection of the cable, the test wire 11 and the connecting wire 15.

[0068] Please refer to Figure 5 The second aspect of this utility model provides a cable testing device, comprising:

[0069] The aforementioned cable testing auxiliary device is used to clamp the cable to be tested 4;

[0070] The testing device 3 has one pole connected to the cable under test 4 and the other pole connected to the test lead 11 of the cable testing auxiliary device.

[0071] In the operation of this embodiment, the current of the detection device 3 flows sequentially through the cable under test 4, the clamping mechanism 2 of the cable detection auxiliary device, the connecting wire 15, the first conductive block 13, the second conductive block 14, and the test wire 11 to form a closed loop. The resistance value of the entire device composed of the clamping mechanism 2, the connecting wire 15, the first conductive block 13, the second conductive block 14, and the test wire 11 is known and fixed. The detected value minus the above resistance value is the resistance value of the cable under test 4, so as to realize the detection of the cable under test 4.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

[0074] Finally, it should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A cable testing auxiliary device, comprising a winding mechanism and a conductive clamping mechanism, characterized in that: The winding mechanism includes a fixed frame, a test lead, a winding wheel, a connecting lead, a conductive block one, and a conductive block two; The fixing frame is fixedly connected to the clamping mechanism; The winding wheel is rotatably mounted on the fixed frame. The winding wheel is provided with a connecting through hole. One end of the connecting through hole is located at the end of the winding wheel, and the other end of the connecting through hole is located at the winding wall of the winding wheel. The conductive block is rotatably engaged in the connecting through hole. The conductive block is arranged near the end of the winding wheel. The conductive block is connected to the connecting wire, and the connecting wire is electrically connected to the clamping mechanism. The second conductive block is rotatably engaged in the connecting through hole. The second conductive block abuts against the first conductive block and is connected to the test lead. The test lead is wound on the winding wheel.

2. The cable testing auxiliary device according to claim 1, characterized in that, The connecting through hole can be a straight through hole or an arc-shaped through hole.

3. The cable testing auxiliary device according to claim 1, characterized in that, The connecting through hole is an arc-shaped through hole, extending along the winding wall of the winding wheel to the end of the winding wheel. The connecting through hole includes a first diameter segment, a second diameter segment, and a third diameter segment connected in sequence. The axis of the first aperture segment is an arc-shaped axis, and the axes of the second aperture segment and the third aperture segment are both in the same direction as the axis of the winding wheel; The first aperture section matches the shape of the test lead, and the first aperture section is used for the test lead to pass through; The second aperture segment matches the shape of the second conductive block, and the second aperture segment is used for elastic insertion and engagement with the second conductive block, and allows the second conductive block to rotate around the axis of the second aperture segment; The third aperture segment matches the shape of the first conductive block. The third aperture segment is used to engage the first conductive block and allows the first conductive block to rotate around the axis of the third aperture segment. The first conductive block is used to restrict the movement of the second conductive block in the direction of the third aperture segment, so as to engage the second conductive block in the second aperture segment.

4. The cable testing auxiliary device according to claim 3, characterized in that, The diameter of the first aperture segment is smaller than that of the second aperture segment, and an annular step is formed at the connection between the first aperture segment and the second aperture segment; A compression spring is compressed between the second conductive block and the step, and the compression spring is used to keep the second conductive block moving in the direction of the first conductive block.

5. The cable testing auxiliary device according to claim 3, characterized in that, The inner peripheral wall of the third aperture section is provided with a groove, and the outer peripheral wall of the first conductive block is provided with an outer edge. The third aperture section, the groove, the outer edge and the first conductive block are all arranged coaxially, and the outer edge is located in the groove.

6. The cable testing auxiliary device according to claim 1, characterized in that, The mounting bracket includes a pair of connecting ears, and the connecting ears are provided with ear through holes; The winding wheel is arranged between the two connecting lugs. The end of the winding wheel is an end shaft, which passes through the lug through hole. The end face of the end shaft is provided with the opening of the connecting through hole.

7. The cable testing auxiliary device according to claim 6, characterized in that, The winding mechanism also includes a spring, which is sleeved on the end shaft. One end of the spring is connected to the fixed frame, and the other end is connected to the winding wheel.

8. The cable testing auxiliary device according to claim 1, characterized in that, The clamping mechanism is a tiger-mouth clamp.

9. The cable testing auxiliary device according to claim 8, characterized in that, A conductive sheet is fixed on the clamping surface of the tiger's mouth clamp, and the conductive sheet is electrically connected to the connecting wire.

10. A cable testing device, characterized in that, include: The cable testing auxiliary device according to any one of claims 1 to 9, wherein the cable testing auxiliary device is used to clamp the cable to be tested; The testing device includes a cable testing auxiliary device, one pole of which is used to connect to the cable under test, and the other pole of which is used to connect to the test lead of the cable testing auxiliary device.

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