Test board for cable resistance

Abstract

The utility model provides a cable resistance test bench, comprising an expansion mechanism and two wire clamping mechanisms installed on the expansion mechanism, the expansion mechanism comprises a pedestal, a chute, a screw rod, a slide block and a support block; the two ends of a cable are respectively arranged between the toothed plates, the lead screw is rotated to drive the two toothed plates to move relatively, the clamping pieces are driven to move relatively, the clamping pieces clamp the two ends of the cable, the copper sheets on the clamping pieces make contact with the cable, the copper sheets are loosened by rotating the bolts, the resistance detection head is placed between the copper sheets and the clamping pieces, and the copper sheets are fixed by screwing the bolts. The resistance detection head is clamped to prevent the resistance detection head from falling off, firstly, one end of a cable is clamped through the cable clamping mechanism, after the other end of the cable is clamped, the screw rod is rotated to drive the sliding block to move, then the supporting block and the cable clamping mechanism are driven to pull the cable, and compared with manual cable pulling, the cable length measuring device can straighten the cable, so that the length of the cable is accurately measured; and the resistance detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection, in particular to a test bench for measuring the resistance of a cable. Background Technique

[0002] A cable is a form of conductor material for transmitting electricity or signals. It consists of one or more electric wires, which are usually made of copper or aluminum and are wrapped by an insulating layer, a protective layer, and possibly a sheath. Cables are widely used in power transmission, communication, construction, and various industrial applications. Cable resistance detection is a commonly used technique for evaluating the performance of cables, and an ohmmeter is often used to directly measure the resistance of the cable.

[0003] During measurement, the cable needs to be suspended to prevent it from touching other objects. At the same time, both ends of the cable need to be fixed and the cable needs to be straightened. In this process, if the length of the cable to be measured is long, due to the decomposition of force, it is difficult to manually straighten and tighten it, resulting in inaccurate measurement of the cable length, thus affecting the accuracy of resistance measurement. Content of the Utility Model

[0004] The purpose of the utility model is to provide a test bench for measuring the resistance of a cable to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A test bench for measuring the resistance of a cable includes an expansion mechanism and two wire clamping mechanisms installed on the expansion mechanism. The expansion mechanism includes a base, a chute, a screw rod, a slider, and a support block. The chute is opened at the center of the top of the base. The screw rod is rotatably connected to the inner bottom wall of the base. The slider is threadedly connected to the screw rod. The support block is fixedly connected to the slider through a connecting block;

[0007] The wire clamping mechanism includes a bracket, a toothed plate, a lead screw, a clamping piece, and a copper sheet. The four brackets are all fixedly connected to the expansion mechanism. The toothed plate is fixedly connected to the bracket. The lead screw is rotatably connected between the brackets. The lead screw is threadedly connected to the toothed plate. The clamping piece is welded to one side of the toothed plate. The copper sheet is arranged on the clamping piece. The clamping piece and the copper sheet are fixedly connected by bolts.

[0008] In one embodiment, two of the brackets are fixedly connected to the base, and the other two brackets are fixedly connected to the support block.

[0009] In one embodiment, the toothed plate is provided with a serrated notch.

[0010] In one embodiment, the lead screw is provided with two sets of external threads with opposite spiral directions.

[0011] In one embodiment, equidistantly distributed convex columns are fixedly connected to two of the clamping pieces, and arc-shaped grooves matching the convex columns are formed in the other two clamping pieces.

[0012] In one embodiment, a knob is fixedly connected to one end of the screw rod.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, both ends of the cable are respectively arranged between the toothed plates. By rotating the lead screw, the two toothed plates move relatively, driving the clamping pieces to move relatively. The clamping pieces clamp both ends of the cable, and the copper sheets thereon contact the cable. By rotating the bolt, the copper sheets are loosened, and the resistance detection head is placed between the copper sheets and the clamping pieces. Then the bolt is tightened to fix the copper sheets and clamp the resistance detection head to prevent it from falling off. First, one end of the cable is clamped by the wire clamping mechanism. After the other end is clamped, the screw rod is rotated to drive the slider to move, and then drive the supporting block and the wire clamping mechanism to pull the cable. Compared with manually pulling the cable, the present utility model can straighten the cable, thereby accurately measuring the length of the cable and improving the accuracy of resistance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is one of the three-dimensional views of the present utility model;

[0016] Figure 2 is the second three-dimensional view of the present utility model;

[0017] Figure 3 is the present utility model Figure 1 Schematic enlarged view of the structure of area A in.

[0018] In the figure: 11, base; 12, chute; 13, screw rod; 14, slider; 15, knob; 16, supporting block; 21, bracket; 22, toothed plate; 23, lead screw; 24, clamping piece; 25, copper sheet; 26, convex column; 27, arc-shaped groove; 28, bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment:

[0021] Please refer to Figures 1 to 3 , the present utility model provides a technical solution:

[0022] A test bench for cable resistance includes an expansion mechanism and two wire clamping mechanisms mounted on the expansion mechanism. One of the wire clamping mechanisms is fixedly installed on the base 11 for fixing one end of the cable, and the other wire clamping mechanism is installed on the sliding support block 16 for clamping and pulling the other end of the cable.

[0023] The expansion mechanism includes a base 11, a chute 12, a screw 13, a slider 14 and a support block 16. The chute 12 is opened at the center of the top of the base 11. The chute 12 is a square groove. The screw 13 is arranged parallel to the chute 12. The screw 13 is rotatably connected to the inner side wall of the bottom of the base 11. The slider 14 is threadedly connected to the screw 13. The support block 16 is fixedly connected to the slider 14 through a connecting block. The connecting block slides on the chute 12. When in use, first clamp one end of the cable through the wire clamping mechanism. After the other end is clamped, rotate the screw 13 to drive the slider 14 to move, and then drive the support block 16 and the wire clamping mechanism to pull the cable. The two wire clamping mechanisms straighten the cable, so that the length of the cable can be accurately measured, and the accuracy of resistance detection can be improved.

[0024] The wire clamping mechanism includes a bracket 21, a toothed plate 22, a lead screw 23, a clamping piece 24 and a copper sheet 25. The four brackets 21 are all fixedly connected to the expansion mechanism. The toothed plate 22 is fixedly connected to the bracket 21. The lead screw 23 is rotatably connected between the brackets 21. The lead screw 23 is threadedly connected to the toothed plate 22. There are two sets of external threads with opposite spiral directions on the lead screw 23. When the lead screw 23 rotates, the two toothed plates 22 on it will move relatively, thereby driving the clamping pieces 24 to move relatively. The clamping pieces 24 are welded to one side of the toothed plate 22. The copper sheet 25 is arranged on the clamping piece 24. The clamping piece 24 and the copper sheet 25 are fixedly connected by a bolt 28. The end of the bolt 28 is a plastic part. When in use, place the two ends of the cable between the toothed plates 22 respectively. Rotate the lead screw 23 to drive the two toothed plates 22 to move relatively, drive the clamping pieces 24 to move relatively, and the clamping pieces 24 clamp the two ends of the cable. The copper sheet 25 on it contacts the cable. Loosen the copper sheet 25 by rotating the bolt 28, place the resistance detection head between the copper sheet 25 and the clamping piece 24, and tighten the bolt 28 to fix the copper sheet 25 and clamp the resistance detection head to prevent it from falling off. Scale lines are set on the base 11 to facilitate reading the length of the cable. Since the two toothed plates 22 move relatively and the moving distances are the same, the cable is always at the center of the base 11, which is convenient for measurement.

[0025] Further, two of the brackets 21 are fixedly connected to the base 11, and the other two brackets 21 are fixedly connected to the support block 16. One of the wire clamping mechanisms is fixedly installed on the base 11 for fixing one end of the cable, and the other wire clamping mechanism is installed on the sliding support block 16 for clamping and pulling the other end of the cable.

[0026] Further, the tooth plate 22 is provided with serrated notches. When the two tooth plates 22 move relative to each other, their notches are inserted into each other in a staggered manner, enhancing the stability of the contact of the tooth plate 22. At the same time, it can also guide the movement of the tooth plate 22 and prevent the tooth plate 22 from being displaced.

[0027] Further, equidistantly distributed convex columns 26 are fixedly connected to two of the clamping pieces 24, and arc-shaped grooves 27 matching the convex columns 26 are provided on the other two clamping pieces 24. The convex column 26 is an arc-shaped semi-cylinder, which matches the arc-shaped groove 27. When the clamping pieces 24 move relatively close to each other, the notches are inserted into each other in a fitting manner, clamping the cable tightly between the two clamping pieces 24, enhancing the contact area between the cable and the clamping pieces 24, improving the stability of clamping the cable, and preventing the cable from falling off.

[0028] Further, a knob 15 is fixedly connected to one end of the screw rod 13. Rotating the knob 15 drives the screw rod 13 to rotate.

[0029] The working principle of the present utility model: During use, both ends of the cable are respectively arranged between the tooth plates 22. By rotating the lead screw 23, the two tooth plates 22 move relative to each other, driving the clamping pieces 24 to move relatively. The clamping pieces 24 clamp both ends of the cable, and the copper sheets 25 thereon contact the cable. By rotating the bolt 28, the copper sheet 25 is loosened, and the resistance detection head is placed between the copper sheet 25 and the clamping piece 24. The bolt 28 is tightened to fix the copper sheet 25 and clamp the resistance detection head to prevent it from falling off. First, one end of the cable is clamped by the wire clamping mechanism. After the other end is clamped, by rotating the screw rod 13, the slider 14 is driven to move, and then the supporting block 16 and the wire clamping mechanism are driven to pull the cable. The two wire clamping mechanisms straighten the cable, so that the length of the cable can be accurately measured, and the accuracy of resistance detection can be improved.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A cable resistance test bench, comprising an expansion mechanism and two clamping mechanisms mounted on the expansion mechanism, characterized in that: The expansion mechanism comprises a base (11), a slide groove (12), a screw rod (13), a slider (14) and a support block (16); the slide groove (12) is opened at the top center of the base (11); the screw rod (13) is rotatably connected to the bottom inner wall of the base (11); the slider (14) is threadedly connected to the screw rod (13); and the support block (16) is fixedly connected to the slider (14) via a connecting block; The wire clamping mechanism comprises a bracket (21), a tooth plate (22), a screw rod (23), a clamping piece (24) and a copper sheet (25); the four brackets (21) are all fixedly connected to the expansion mechanism; the tooth plate (22) is fixedly connected to the bracket (21); the screw rod (23) is rotatably connected between the brackets (21); the screw rod (23) is threadedly connected to the tooth plate (22); the clamping piece (24) is welded to one side of the tooth plate (22); the copper sheet (25) is arranged on the clamping piece (24); and the clamping piece (24) and the copper sheet (25) are fixedly connected by bolts (28).

2. A cable resistance test bench according to claim 1, characterized in that: Two of the brackets (21) are fixedly connected to the base (11), and the other two of the brackets (21) are fixedly connected to the support block (16).

3. A cable resistance test bench according to claim 1, characterized in that: The tooth plate (22) is provided with a sawtooth-shaped notch.

4. A cable resistance test bench according to claim 1, characterized in that: The screw rod (23) is provided with two groups of external threads with spiral directions opposite to each other.

5. The cable resistance test bench according to claim 1, characterized in that: Two of the clips (24) are fixedly connected with equidistantly distributed protruding columns (26), and the other two clips (24) are provided with arc-shaped grooves (27) matching the protruding columns (26).

6. A cable resistance test bench according to claim 1, characterized in that: One end of the screw rod (13) is fixedly connected to a knob (15).

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