Test clamp structure for resistance tester

Abstract

The utility model relates to the technical field of test pliers, in particular to a test pliers structure for a resistance tester, which comprises a first clamping arm, a second clamping arm, a turntable and a tightness adjusting assembly. A first disc is arranged on the first clamping arm; a second disc is arranged on the second clamping arm, the second disc is rotationally connected with the first disc, and metal conductive blocks are arranged on the first clamping arm and the second clamping arm; the turntable is coaxially and rotatably connected with the first disc and the second disc, a guide frame is arranged on the turntable, a first sliding block is slidably arranged on the guide frame, two groups of connecting rods are symmetrically arranged on the first sliding block and rotatably connected with the first clamping arm and the second clamping arm respectively, and a spring for pushing the first sliding block is arranged on the guide frame; the tightness adjusting assembly is arranged on the guide frame and adjusts the tension degree of the spring in the working state. According to the utility model, the clamping force can be rapidly adjusted through the tightness adjusting assembly, and the whole test clamp is simple and convenient to assemble.

Description

Technical Field

[0001] This utility model relates to the field of test clamp technology, specifically to a test clamp structure for a resistance tester. Background Technology

[0002] When measuring a transformer, a resistance tester is usually required. In actual operation, the test clamps at the ends of the test leads are clamped to both ends of the winding of the transformer under test, and the DC resistance value of the winding ends is measured.

[0003] However, existing test clamps generally have simple structures, and almost all of them achieve elastic reset of the test clamps through torsion springs. The structure of such torsion springs is fixed, and after frequent use, the torsion springs will gradually weaken, thereby causing the clamping force between the test clamps and the clamped parts to gradually decrease until it disappears. Therefore, it is necessary to improve the existing test clamp structure. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a test clamp structure for a resistance tester.

[0005] The technical solution of this utility model is: a test clamp structure for a resistance tester, including a first clamping arm and a first disk disposed on the first clamping arm;

[0006] The second clamping arm has a second disk on it, which is coaxially rotatably connected to the first disk. The first and second clamping arms each have a metal conductive block on their clamping parts.

[0007] A turntable is coaxially rotatably connected to both the first and second discs. A guide frame is provided on the turntable, located between the gripping parts of the first and second clamping arms. A first slider is slidably provided on the guide frame. Two sets of connecting rods are symmetrically and rotatably provided on the first slider. The gripping parts of the first and second clamping arms are rotatably connected to the connecting rods on the corresponding sides, and a spring for pushing the first slider is provided on the guide frame.

[0008] And a tension adjustment component, which is mounted on the guide frame, and adjusts the tension of the spring during operation.

[0009] Preferably, a slot is provided on the gripping part of the first clamping arm and the second clamping arm respectively, and a locking block is provided in each slot. Each connecting rod is rotatably connected to the locking block on the corresponding side.

[0010] Preferably, it further includes a first bolt, a slot is provided on the clamping part of the first clamping arm and the second clamping arm respectively, an insert plate is provided on the metal conductive block, the insert plate is inserted into the slot and slidably connected to its inner wall, and each insert plate is connected to the first clamping arm and the second clamping arm respectively by the first bolt.

[0011] Preferably, it also includes a limiting component, which includes a pin and a second bolt. A rotating shaft is provided on the first disc, and the second disc and the turntable are coaxially connected to the rotating shaft. A non-cylindrical through hole coaxial with the rotating shaft is provided on the rotating shaft. One end of the pin is inserted into the through hole and slidably connected to its inner wall. The thread of the second bolt is inserted into the pin and helically connected to it, and the end cap of the second bolt is rotatably connected to the turntable.

[0012] Preferably, the guide frame is provided with several parallel sliding rods, which pass through the first slider and are slidably connected to it, and springs are sleeved on the sliding rods.

[0013] Preferably, the tension adjustment assembly includes a second slider and a lead screw. The second slider is movably mounted on the guide frame and slidably connected to the slide rod. The two ends of the spring abut against the first slider and the second slider, respectively. The lead screw is rotatably mounted on the guide frame. The first slider is slidably connected to the lead screw, and the second slider is helically connected to the lead screw. A knob is provided at one end of the lead screw that extends out of the guide frame.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0015] By incorporating a detachable metal conductive block, when the surface of the metal conductive block becomes excessively worn, only the metal conductive block needs to be replaced, making the operation simple and convenient. Furthermore, by setting up a turntable that rotates coaxially with the first and second discs, a guide frame is mounted on the turntable, and a first slider, a second slider, a spring, and a tension adjustment assembly are installed on the guide frame. The second slider is connected to the first and second clamping arms via a connecting rod and a locking block. The locking block is connected to the first and second clamping arms by inserting it into a slot on the clamping arm, simplifying the operation. The tension of the two clamping arms can be adjusted using the tension adjustment assembly. This structure also improves the assembly efficiency of workers during actual production. Attached Figure Description

[0016] Figure 1 This is a perspective view of one embodiment of the present invention.

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 A schematic diagram of the connection structure of the various components on the turntable;

[0019] Figure 4 This is a schematic diagram of the limit component.

[0020] Reference numerals: 1. First clamping arm; 2. First disc; 3. Rotating shaft; 301. Through hole; 4. Second clamping arm; 5. Second disc; 6. Slot; 7. Slot; 8. Metal conductive block; 9. Insert plate; 10. First bolt; 11. Turntable; 12. Limiting assembly; 121. Pin; 122. Second bolt; 13. Guide frame; 14. Slide rod; 15. First slider; 16. Second slider; 17. Spring; 18. Connecting rod; 19. Locking block; 20. Lead screw; 21. Knob. Detailed Implementation

[0021] Example 1

[0022] like Figure 1-4 As shown, the present invention proposes a test clamp structure for a resistance tester, comprising a first clamping arm 1, a second clamping arm 4, a turntable 11, and a tension adjustment assembly. A first disc 2 is mounted on the first clamping arm 1. A second disc 5 is mounted on the second clamping arm 4, and the second disc 5 is coaxially rotatably connected to the first disc 2. A metal conductive block 8 is respectively mounted on the clamping portion of the first clamping arm 1 and the second clamping arm 4. A slot 6 is respectively provided on the gripping portion of the first clamping arm 1 and the second clamping arm 4, and a locking block 19 is respectively provided in each slot 6. The turntable 11 is coaxially rotatably connected to both the first disc 2 and the second disc 5. A guide frame 13 is mounted on the turntable 11, located between the gripping portions of the first clamping arm 1 and the second clamping arm 4. A first slider 15 is slidably mounted on the guide frame 13, and two sets of connecting rods 18 are symmetrically and rotatably mounted on the first slider 15. Each connecting rod 18 is rotatably connected to the locking block 19 on the corresponding side, and a spring 17 for pushing the first slider 15 is provided on the guide frame 13. A plurality of parallel slide rods 14 are provided on the guide frame 13. The slide rods 14 pass through the first slider 15 and are slidably connected to it. A spring 17 is sleeved on the slide rod 14. A tension adjustment assembly is provided on the guide frame 13. The tension adjustment assembly includes a second slider 16 and a lead screw 20. The second slider 16 is movably mounted on the guide frame 13 and is slidably connected to the slide rods 14. The two ends of the spring 17 abut against the first slider 15 and the second slider 16, respectively. The lead screw 20 is rotatably mounted on the guide frame 13. The first slider 15 is slidably connected to the lead screw 20, and the second slider 16 is helically connected to the lead screw 20. A knob 21 is provided at the end of the lead screw 20 that extends out of the guide frame 13. The tension adjustment assembly adjusts the tension of the spring 17 in the working state.

[0023] In this invention, when connecting the turntable 11, as the turntable 11 approaches the second disc 5, the turntable 11 and the end shaft on the second disc 5 are coaxially rotated and connected, respectively inserting the two sets of locking blocks 19 into the corresponding slots 6. Pressing down on the locking blocks 19 makes them lock into place, thus completing the connection between the tensioning mechanism and the test clamp. When it is necessary to adjust the clamping force of the clamping part of the test clamp, the screw 20 is driven to rotate by the knob 21. The screw 20 drives the second slider 16 to slide while rotating. The second slider 16 slides and squeezes the spring 17. The spring 17 contracts, and its pushing force on the first slider 15 increases, thereby increasing the clamping force between the metal conductive blocks 8.

[0024] Example 2

[0025] like Figure 1-2 As shown, the present invention proposes a test clamp structure for a resistance tester. Compared with Embodiment 1, this embodiment further includes a first bolt 10, a slot 7 is provided on the clamping part of the first clamping arm 1 and the second clamping arm 4 respectively, an insert plate 9 is provided on the metal conductive block 8, the insert plate 9 is inserted into the slot 7 and slidably connected to its inner wall, each insert plate 9 is connected to the first clamping arm 1 and the second clamping arm 4 respectively by the first bolt 10, and anti-slip teeth are provided on the metal conductive block 8.

[0026] In this embodiment, the anti-slip teeth are easily worn structures. When the anti-slip teeth are severely worn, the test clamp may fall off the clamping point of the device under test. At this time, the first bolt 10 can be rotated and pulled out. Then, the metal conductive block 8 can be pulled out of the slot 7, which makes it easier to replace the metal conductive plate 8.

[0027] Example 3

[0028] like Figure 1 . Figure 2 and Figure 4 As shown, the present invention proposes a test clamp structure for a resistance tester. Compared with Embodiment 1 or Embodiment 2, this embodiment further includes a limiting component 12. The limiting component 12 includes a pin 121 and a second bolt 122. A rotating shaft 3 is provided on the first disc 2. The second disc 5 and the turntable 11 are both coaxially connected to the rotating shaft 3. A non-cylindrical through hole 301 coaxial with the rotating shaft 3 is provided on the rotating shaft 3. One end of the pin 121 is inserted into the through hole 301 and slidably connected to its inner wall. The thread of the second bolt 122 is inserted into the pin 121 and helically connected to it. The end cap of the second bolt 122 is rotatably connected to the turntable 11.

[0029] In this embodiment, the non-cylindrical through-hole 301 structure facilitates the anti-rotation locking of the pin after it is inserted, thereby facilitating the screwing of the second bolt 122 into the pin. This structure is easy to disassemble and assemble, and can facilitate the assembly of the entire test clamp during the production process.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A test clamp structure for a resistance tester, characterized in that, include: A first clamping arm (1) is provided with a first disc (2); The second clamping arm (4) is provided with a second disk (5), which is coaxially rotatably connected to the first disk (2). The first clamping arm (1) and the second clamping arm (4) are respectively provided with a metal conductive block (8) on the clamping part. Turntable (11) is coaxially rotatably connected to the first disc (2) and the second disc (5). A guide frame (13) is provided on the turntable (11). The guide frame (13) is located between the gripping parts of the first clamping arm (1) and the second clamping arm (4). A first slider (15) is slidably provided on the guide frame (13). Two sets of connecting rods (18) are symmetrically and rotatably provided on the first slider (15). The gripping parts of the first clamping arm (1) and the second clamping arm (4) are rotatably connected to the connecting rods (18) on the corresponding sides. A spring (17) for pushing the first slider (15) is provided on the guide frame (13). And a tension adjustment component, which is set on the guide frame (13) and adjusts the tension of the spring (17) in the working state.

2. The test clamp structure for a resistance tester according to claim 1, characterized in that, A slot (6) is provided on the gripping part of the first clamping arm (1) and the second clamping arm (4), and a block (19) is provided in each slot (6). Each connecting rod (18) is rotatably connected to the block (19) on the corresponding side.

3. The test clamp structure for a resistance tester according to claim 1, characterized in that, It also includes a first bolt (10), a slot (7) is provided on the clamping part of the first clamping arm (1) and the second clamping arm (4), and a plug plate (9) is provided on the metal conductive block (8). The plug plate (9) is inserted into the slot (7) and slidably connected to its inner wall. Each plug plate (9) is connected to the first clamping arm (1) and the second clamping arm (4) respectively through the first bolt (10).

4. The test clamp structure for a resistance tester according to claim 1, characterized in that, It also includes a limiting component (12), which includes a pin (121) and a second bolt (122). A rotating shaft (3) is provided on the first disc (2). The second disc (5) and the turntable (11) are both coaxially connected to the rotating shaft (3). A non-cylindrical through hole (301) coaxial with the rotating shaft (3) is provided on the rotating shaft (3). One end of the pin (121) is inserted into the through hole (301) and slidably connected to its inner wall. The thread of the second bolt (122) is inserted into the pin (121) and helically connected to it. The end cap of the second bolt (122) is rotatably connected to the turntable (11).

5. The test clamp structure for a resistance tester according to claim 1, characterized in that, A number of parallel slide rods (14) are provided on the guide frame (13). The slide rods (14) pass through the first slider (15) and are slidably connected to it. The spring (17) is sleeved on the slide rods (14).

6. The test clamp structure for a resistance tester according to claim 5, characterized in that, The tension adjustment assembly includes a second slider (16) and a lead screw (20). The second slider (16) is movably mounted on the guide frame (13) and slidably connected to the slide rod (14). The two ends of the spring (17) abut against the first slider (15) and the second slider (16) respectively. The lead screw (20) is rotatably mounted on the guide frame (13). The first slider (15) is slidably connected to the lead screw (20), and the second slider (16) is helically connected to the lead screw (20). A knob (21) is provided at one end of the lead screw (20) that extends out of the guide frame (13).

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