Clamping structure of direct current resistance tester

Abstract

The utility model provides a clamping structure of a direct current resistance tester, which comprises a protection box, the middle part of the front end of the protection box is movably connected with a box door through a hinge, a tester body is placed on the lower box wall of the protection box, and the middle part of the upper box wall of the protection box is movably connected with a pressing mechanism in a penetrating manner. A storage box is fixedly connected to the lower portion of the right end of the protection box, inlets and outlets are formed in the middle of the front box wall and the middle of the rear box wall of the storage box, four test wires are movably connected into the two inlets and outlets in a penetrating mode, and the ends, away from the storage box, of the four test wires are clamped to the tester body; the four corners of the lower end of the protection box are fixedly connected with anti-skid foot pads. According to the clamping structure of the direct-current resistance tester, the clamping frame and the pressing mechanism are arranged, the clamping and fixing effect on the tester is enhanced, the application range is expanded, the storage box and the limiting strip are arranged, a test wire is convenient to store, and the length of the test wire can be flexibly adjusted.

Description

Technical Field

[0001] The utility model relates to a clamping structure of a DC resistance tester, belonging to the field of resistance testers. Background Technique

[0002] The measurement of DC resistance is a necessary test item for semi-finished products, finished products, factory tests, installation, handover tests and preventive tests of power departments in the manufacture of inductive coils such as transformers, current transformers, reactors, and electromagnetic operating mechanisms. It can effectively detect manufacturing defects such as material selection, welding, loose connection parts, missing strands, and broken wires of inductive coils and potential hazards existing after operation;

[0003] In the Chinese patent with the publication number CN210347774U, a DC resistance tester for high-speed sorting is mentioned. The clamping structure is provided with a clamping rod, a positioning cylinder, a pressing piece and a composite spring. Through the elastic action of the composite spring, the pressing piece moves inside the positioning cylinder, and the clamping rod drives the rubber clamping strip to move synchronously, so as to clamp the tester body and prevent it from shaking, thereby improving the stability of the resistance tester during use; however, in the prior art, only the elasticity of the composite spring is used to clamp the tester, resulting in poor clamping effect of the clamping structure on the tester, making the tester not clamped firmly and stably, and the telescopic range of the composite spring is small, resulting in the clamping structure being inconvenient to clamp testers of different sizes, reducing the applicable range and also reducing the practicability. Therefore, we introduce a clamping structure of a DC resistance tester. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a clamping structure of a DC resistance tester to solve the problems raised in the above background technique. The clamping structure of the utility model has strong clamping effect, wide application range, can accommodate wires, and has good practicability.

[0005] In order to achieve the above purpose, the utility model is realized by the following technical solutions:

[0006] A clamping structure of a DC resistance tester, including a protective box. The middle part of the front end of the protective box is movably connected with a box door through a hinge. A tester body is placed on the lower box wall of the protective box. The middle part of the upper box wall of the protective box is inserted and movably connected with a pressing mechanism. The lower right part of the protective box is fixedly connected with a storage box. Import and export openings are respectively arranged in the middle of the front box wall and the middle of the rear box wall of the storage box. Four test wires are inserted and movably connected in both of the import and export openings. The ends of the four test wires far away from the storage box are clamped with the tester body. Anti-slip foot pads are fixedly connected to the four corners of the lower end of the protective box. A positive and reverse screw rod is inserted and movably connected between the upper part of the left box wall and the middle part of the right box wall of the protective box through bearings. The middle part of the right end of the positive and reverse screw rod is fixedly connected with an adjusting handle. Clamping brackets are threadedly connected to the left part and the right part of the outer surface of the positive and reverse screw rod. Avoidance grooves are respectively arranged on the upper parts of the opposite surfaces of the two clamping brackets.

[0007] Further, the pressing mechanism includes a moving plate. The middle part of the upper end of the moving plate is threadedly connected with an adjusting screw rod. The lower end of the adjusting screw rod is inserted and movably connected with the upper end of the protective box through a bearing. The upper end of the adjusting screw rod is fixedly connected with an adjusting block. Pressing rods are fixedly connected to the four corners of the lower end of the moving plate. The lower ends of the four pressing rods all penetrate through the upper box wall of the protective box and are jointly fixedly connected with a pressing plate.

[0008] Further, the distance between the opposite surfaces of the two left pressing rods is larger than the length between the positive and reverse screw rods. The outer surface of the pressing plate is slidably connected with the groove wall of the avoidance groove, and a plurality of anti-slip lines are engraved on the lower end of the pressing plate.

[0009] Further, both of the clamping brackets are arranged in an F-shaped structure, and the lengths of the two clamping brackets are both the same as the height inside the protective box.

[0010] Further, a winding shaft is inserted and movably connected between the left box wall and the right box wall of the storage box through bearings. A gear is inserted and fixedly connected to the right end of the winding shaft. A fixed block is fixedly connected to the lower right part of the storage box. A limiting frame is inserted and movably connected to the middle part of the upper end of the fixed block. A limiting strip is fixedly connected to the upper end of the limiting frame. A spring is sleeved on the upper part of the outer surface of the limiting frame.

[0011] Further, the limiting frame is arranged in a T-shaped structure. The limiting strip is clamped with the gear. All four test wires are wound on the outer surface of the winding shaft.

[0012] The beneficial effects of the present utility model:

[0013] 1. By setting the clamping frame and the pressing mechanism, rotating the positive and negative screw rod drives the two clamping frames to move towards the middle, so that the tester can be clamped from both the left and right sides. Then, by rotating the adjusting screw rod to push the pressing plate downwards, the tester can be clamped from both the upper and lower sides, which can strengthen the clamping and fixing effect of the tester, and also make the clamping structure convenient for clamping testers of different sizes, thus expanding the scope of application.

[0014] 2. By setting the storage box and the limiting strip, pulling the limiting frame to contract the spring can cancel the limiting and fixing of the limiting strip on the gear. Then, holding the gear and rotating the winding shaft, the test wire can be wound around the winding shaft and stored in the storage box, which is convenient for storing the test wire, and the length of the test wire can be flexibly adjusted by rotating the winding shaft forward and backward. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects, and advantages of the present utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 It is a schematic structural diagram of a clamping structure of a DC resistance tester of the present utility model;

[0017] Figure 2 It is a schematic connection diagram of a clamping component and a pressing mechanism in a clamping structure of a DC resistance tester of the present utility model;

[0018] Figure 3 It is a schematic diagram of a pressing mechanism in a clamping structure of a DC resistance tester of the present utility model;

[0019] Figure 4 In a clamping structure of a DC resistance tester of the present utility model Figure 1 The enlarged view of A;

[0020] In the figure: 1. Protective box; 2. Box door; 3. Tester body; 4. Pressing mechanism; 5. Storage box; 6. Import and export; 7. Test wire; 8. Anti-slip foot pad; 9. Positive and negative screw rod; 10. Adjusting handle; 11. Clamping frame; 12. Avoidance groove; 41. Moving plate; 42. Adjusting screw rod; 43. Adjusting block; 44. Pressing rod; 45. Pressing plate; 51. Winding shaft; 52. Gear; 53. Fixed block; 54. Limiting frame; 55. Limiting strip; 56. Spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical means, creative features, achieved purposes, and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please refer to Figures 1 to 3 , the present utility model provides a technical solution:

[0023] It includes a protective box 1. The middle of the front end of the protective box 1 is movably connected with a box door 2 through a hinge. A tester body 3 is placed on the lower box wall of the protective box 1. The middle of the upper box wall of the protective box 1 is inserted and movably connected with a pressing mechanism 4. The lower right end of the protective box 1 is fixedly connected with a storage box 5. Import and export openings 6 are provided in the middle of the front box wall and the middle of the rear box wall of the storage box 5. Four test wires 7 are inserted and movably connected in both of the two import and export openings 6. The ends of the four test wires 7 far away from the storage box 5 are clamped with the tester body 3. Anti-slip foot pads 8 are fixedly connected to the four corners of the lower end of the protective box 1. A positive and reverse lead screw 9 is inserted and movably connected between the upper part of the left box wall and the middle of the right box wall of the protective box 1 through bearings. A regulating handle 10 is fixedly connected to the middle of the right end of the positive and reverse lead screw 9. Clamping brackets 11 are threadedly connected to the left part and the right part of the outer surface of the positive and reverse lead screw 9. Avoidance grooves 12 are provided in the upper parts of the opposite surfaces of the two clamping brackets 11; The pressing mechanism 4 includes a moving plate 41. A regulating screw 42 is threadedly connected to the middle of the upper end of the moving plate 41. The lower end of the regulating screw 42 is inserted and movably connected with the upper end of the protective box 1 through a bearing. A regulating block 43 is fixedly connected to the upper end of the regulating screw 42. Pressing rods 44 are fixedly connected to the four corners of the lower end of the moving plate 41. The lower ends of the four pressing rods 44 all penetrate through the upper box wall of the protective box 1 and are jointly fixedly connected with a pressing plate 45; The distance between the opposite surfaces of the two left pressing rods 44 is larger than the length between the positive and reverse lead screws 9. The outer surface of the pressing plate 45 is slidably connected with the groove wall of the avoidance groove 12. The avoidance groove 12 does not affect the up and down movement of the pressing plate 45, nor does it affect the left and right movement of the clamping bracket 11. A number of anti-slip lines are engraved on the lower end of the pressing plate 45, which can increase the friction between the pressing plate 45 and the tester body 3 and strengthen the pressing and fixing effect; Both of the two clamping brackets 11 are arranged in an F-shaped structure, which can strengthen the clamping and fixing effect of the clamping brackets 11 on the tester body 3. The lengths of the two clamping brackets 11 are both the same as the height inside the protective box 1, so that the protective box 1 plays a limiting role on the clamping brackets 11 and improves the stability of the clamping brackets 11.

[0024] Specific implementation manner: First, open the box door 2, and then place the tester body 3 on the lower box wall of the protective box 1. At this time, rotate the adjusting handle 10 to drive the positive and negative screw rod 9 to rotate, which can drive the two clamping brackets 11 to move towards the middle and clamp and fix the tester body 3 together, so as to clamp the tester body 3 from the left and right sides. Then, rotate the adjusting block 43 to drive the adjusting screw rod 42 to rotate, so that the moving plate 41 drives the four pressing rods 44 to move downward, and the pressing plate 45 can press and fix the tester body 3 from above, so as to clamp the tester body 3 from the upper and lower sides, thereby strengthening the clamping and fixing effect on the tester body 3, and also clamping the tester body 3 more firmly and stably. Moreover, by rotating the positive and negative screw rod 9 and the adjusting screw rod 42 forward or backward, the adjustment range of the clamping structure is relatively large, so it is also convenient for the clamping structure to clamp and fix the tester body 3 of different sizes, expanding the applicable range of the clamping structure and improving the practicality of the clamping structure.

[0025] Please refer to Figure 1 and Figure 4 , a winding shaft 51 is inserted and movably connected between the left box wall and the right box wall of the storage box 5 through bearings. The right end of the winding shaft 51 is inserted and fixedly connected with a gear 52. The lower part of the right end of the storage box 5 is fixedly connected with a fixed block 53. The middle part of the upper end of the fixed block 53 is inserted and movably connected with a limiting frame 54. The upper end of the limiting frame 54 is fixedly connected with a limiting strip 55. A spring 56 is sleeved on the upper part of the outer surface of the limiting frame 54; the limiting frame 54 is arranged in a T-shaped structure, which is convenient for pulling the limiting frame 54. The limiting strip 55 is clamped with the gear 52, so that the limiting strip 55 can play a limiting role on the gear 52 to realize the positioning of the winding shaft 51. The four test leads 7 are all wound on the outer surface of the winding shaft 51, and the test leads 7 can be wound and unwound by rotating the winding shaft 51.

[0026] Specific implementation manner: Before the tester body 3 detects an item, the limiting frame 54 can be pulled first to make the spring 56 contract, and also make the limiting strip 55 move downward to cancel the limiting and fixing of the gear 52. Then hold the gear 52 and rotate it to rotate the winding shaft 51 to wind or unwind the test leads 7, and the length of the test leads 7 can be flexibly adjusted according to the use requirements. Then connect one end of the test leads 7 to the tester body 3. When the tester body 3 is not in use, the test leads 7 can be wound on the winding shaft 51 and the test leads 7 can be stored in the storage box 5, so as to facilitate the storage of the test leads 7 and improve the practical performance.

[0027] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clamping structure of a DC resistance tester, comprising a protective box (1), characterized in that: In the middle of the front end of the protective box (1), a box door (2) is movably connected through a hinge. A tester body (3) is placed on the lower box wall of the protective box (1). In the middle of the upper box wall of the protective box (1), a pressing mechanism (4) is inserted and movably connected. At the lower right end of the protective box (1), a storage box (5) is fixedly connected. In the middle of the front box wall and the middle of the rear box wall of the storage box (5), an inlet and outlet (6) are respectively provided. Four test leads (7) are inserted and movably connected in each of the two inlets and outlets (6). And the ends of the four test leads (7) far away from the storage box (5) are clamped with the tester body (3). Anti-slip foot pads (8) are fixedly connected to the four corners of the lower end of the protective box (1). Between the upper part of the left box wall and the middle of the right box wall of the protective box (1), a positive and reverse lead screw (9) is inserted and movably connected through a bearing. In the middle of the right end of the positive and reverse lead screw (9), an adjusting handle (10) is fixedly connected. On the left part of the outer surface and the right part of the outer surface of the positive and reverse lead screw (9), a clamping bracket (11) is threadedly connected. On the opposite surfaces of the two clamping brackets (11), a relief groove (12) is provided at the upper part.

2. The clamping structure of the DC resistance tester according to claim 1, wherein: The pressing mechanism (4) includes a moving plate (41). In the middle of the upper end of the moving plate (41), an adjusting screw (42) is threadedly connected. And the lower end of the adjusting screw (42) is inserted and movably connected to the upper end of the protective box (1) through a bearing. At the upper end of the adjusting screw (42), an adjusting block (43) is fixedly connected. At the four corners of the lower end of the moving plate (41), a pressing rod (44) is fixedly connected. The lower ends of the four pressing rods (44) all penetrate through the upper box wall of the protective box (1) and are jointly fixedly connected to a pressing plate (45).

3. The clamping structure of the DC resistance tester according to claim 2, characterized in that: The distance between the opposite surfaces of the two left pressing rods (44) is larger than the length between the positive and reverse lead screws (9). The outer surface of the pressing plate (45) is slidably connected to the groove wall of the relief groove (12). And a plurality of anti-slip lines are engraved on the lower end of the pressing plate (45).

4. The clamping structure of the DC resistance tester according to claim 1, wherein: Both of the two clamping brackets (11) are arranged in an F-shaped structure. And the lengths of the two clamping brackets (11) are the same as the height inside the protective box (1).

5. The clamping structure of the DC resistance tester according to claim 1, wherein: Between the left box wall and the right box wall of the storage box (5), a winding shaft (51) is inserted and movably connected through a bearing. At the right end of the winding shaft (51), a gear (52) is inserted and fixedly connected. At the lower right end of the storage box (5), a fixed block (53) is fixedly connected. In the middle of the upper end of the fixed block (53), a limiting frame (54) is inserted and movably connected. At the upper end of the limiting frame (54), a limiting strip (55) is fixedly connected. On the upper part of the outer surface of the limiting frame (54), a spring (56) is sleeved.

6. The clamping structure of the DC resistance tester according to claim 5, wherein: The limiting frame (54) is arranged in a T-shaped structure. The limiting strip (55) is clamped with the gear (52). The four test leads (7) are all wound on the outer surface of the winding shaft (51).

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