Dynamic resistance tester chuck
By setting insulating plates and conductive sheets on the clamps of the dynamic resistance tester, the problem of poor conductivity in the prior art is solved, and efficient and accurate resistance testing is achieved.
Patent Information
- Application Number
- CN202520136860.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing dynamic resistance tester clamps have poor conductivity due to the clamping surface being made of insulating material, requiring additional conductive material to be wrapped around them, which affects the accuracy and convenience of the test results.
A dynamic resistance tester clamp was designed, which uses an insulating clamp plate with conductive sheets and lugs for multimeter probes, so as to directly clamp the sample to be tested and avoid contact resistance.
It simplifies the testing process, improves detection efficiency and accuracy, is applicable to samples of different types and shapes, and expands the scope of application.
Smart Images
Figure CN223870703U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of magnetic core manufacturing, and specifically relates to a chuck for a dynamic resistance tester. Background Technology
[0002] Dynamic resistance testers are used to test the resistance of conductive textiles and other items. Existing dynamic resistance testers require clamps to hold both ends of the textile being tested, but this has the following drawbacks:
[0003] Because the existing clamps have insulating surfaces, which are not conducive to conductivity, a conductive material with good ductility is needed when testing the sample. This material must be cut to the required shape, wrapped around the sample, and then clamped. Furthermore, since the existing clamps lack a connection to the multimeter probes, the multimeter probes must be clamped to the sample or connected to the conductive material covering the sample. This can easily lead to contact resistance, affecting the accuracy of the final test results.
[0004] To address the above shortcomings, a dynamic resistance tester clamp is needed to improve the convenience and accuracy of testing. Utility Model Content
[0005] The purpose of this invention is to provide a chuck for a dynamic resistance tester, which can improve the convenience and accuracy of testing.
[0006] This utility model provides the following technical solution:
[0007] A dynamic resistance tester clamp includes two clamps symmetrically arranged on the left and right sides, a base, and a connecting beam; the lower ends of the clamps are connected to the base via the connecting beam.
[0008] The chuck includes an upper pressure plate, a lower pressure plate, a rotating bolt, and a top plate and a bottom plate arranged in parallel, with the sides of the top plate and the bottom plate connected by a support beam;
[0009] The lower pressure plate is set on the base plate, and the upper pressure plate is set above the upper pressure plate. A rotating bolt passes through the top plate and is rotatably connected to the upper pressure plate. The base plate is connected to the base via a connecting beam.
[0010] Its characteristic is that: the upper pressure plate and the lower pressure plate are respectively provided with a first clamping plate and a second clamping plate with a right-angled cross-section;
[0011] The first clamping plate and the second clamping plate are respectively clamped onto the upper pressure plate and the lower pressure plate, and the fastening bolts penetrate horizontally through the horizontal base surface of the first clamping plate and the second clamping plate to fasten the first clamping plate and the second clamping plate together.
[0012] Both the first and second clamping plates are made of insulating material; the surface of the first clamping plate on the lower pressure plate is provided with a first conductive sheet, and the first conductive sheet is provided with a lug for holding the multimeter probes; the surface of the first clamping plate on the upper pressure plate is provided with a second conductive sheet.
[0013] Preferably, the first conductive sheet and the second conductive sheet are made of one of the following materials: 304 stainless steel, silver, or copper.
[0014] Preferably, the thickness of the first conductive sheet and the second conductive sheet is 1-2 mm.
[0015] Preferably, the surfaces of the first conductive sheet and the second conductive sheet are provided with anti-slip textures.
[0016] Preferably, the first conductive sheet and the second conductive sheet are bonded to the surface of the first clamping plate.
[0017] Preferably, the screw holes on the first clamping plate are threaded, while the second clamping plate has holes without threads.
[0018] Preferably, the fastening bolts are provided with several length specifications.
[0019] Preferably, a pair of guide rods are provided on the side of the upper pressure plate. The guide rods pass through the upper pressure plate and are connected to the top plate and the bottom plate at both ends respectively. They are located between the upper pressure plate and the bottom plate, and a spring is provided on the guide rod.
[0020] The beneficial effects of this utility model are:
[0021] 1. This device eliminates the need to cut the corresponding conductive wrapping material each time, and can directly clamp and fix the sample to be tested, simplifying the testing steps and greatly improving the detection efficiency.
[0022] 2. This device uses the metal plates on the first and second conductive plates on the first clamp to closely fit the sample to be tested, and clamps the multimeter probes for testing resistance on the lugs. In the circuit formed by this, the effective resistance is the part of the sample between the two clamps, and the contact resistance can be ignored, which greatly improves the accuracy of the test.
[0023] 3. This device has a high capacity for testing samples and can test samples of different types and shapes, such as yarns and fabrics, thus improving its applicability. Attached Figure Description
[0024] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0025] Figure 1 This is a schematic diagram of the overall structure;
[0026] Figure 2 This is a schematic diagram of a partial structure;
[0027] Figure 3 A schematic diagram of the first and second clamping plates;
[0028] Figure 4 This is a schematic diagram of the structure of the first and second conductive sheets.
[0029] The following are marked in the diagram: 1. Base; 2. Connecting beam; 3. Top plate; 4. Bottom plate; 5. Upper pressure plate; 6. Lower pressure plate; 7. Guide rod; 8. Spring; 9. First clamping plate; 10. Second clamping plate; 11. First conductive sheet; 12. Second conductive sheet; 13. Lug; 14. Fastening bolt; 15. Rotating bolt; 16. Support beam. Detailed Implementation
[0030] like Figures 1 to 4 A dynamic resistance tester clamp includes two clamps symmetrically arranged on the left and right, a base 1, and a connecting beam 2. The lower end of the clamp 1 is connected to the base 1 via the connecting beam 2. The two clamps clamp the two ends of the textile to be tested. To achieve the clamping function, the clamp 1 includes an upper pressure plate 5, a lower pressure plate 6, a rotating bolt 15, and a top plate 3 and a bottom plate 4 arranged in parallel. The sides of the top plate 3 and the bottom plate 4 are connected by a support beam 16. The lower pressure plate 6 is set on the bottom plate 4, and the upper pressure plate 5 is set above the upper pressure plate 6. The rotating bolt 15 passes through the top plate 3 and is rotatably connected to the upper pressure plate 5. The rotatable connection can adopt a traditional structure, such as an enlarged structure at the lower part of the rotating bolt 15, and the upper pressure plate 5 has a hole that matches the enlarged structure. In short, as long as the rotatable connection can be achieved, it is acceptable.
[0031] Rotating the screw 15 causes it to move up and down, which in turn drives the upper pressure plate 5 to move up and down reciprocally, thus achieving the clamping function. The base plate 4 is connected to the base 1 via the connecting beam 2, thus connecting the entire clamp to the base 1. To improve the stability of the upper pressure plate 9's displacement, a pair of guide rods 7 are provided on the side of the upper pressure plate 9 for guiding. The guide rods 7 pass through the upper pressure plate 9, and their two ends are connected to the top plate 3 and the bottom plate 4, respectively. A spring 8 is provided on the guide rod 7 between the upper pressure plate 9 and the bottom plate 4 to provide up and down elastic force. In practical applications, as shown in the attached... Figure 1 The connecting beam 2 can achieve lateral, longitudinal and circumferential displacement through a mechanical structure. Such transmission and testing structures are known technologies, and the specific structures will not be described in detail.
[0032] The main innovation of this technical solution lies in the fact that the upper pressure plate 5 and the lower pressure plate 6 are respectively provided with a first clamping plate 9 and a second clamping plate 10 with a right-angled cross-section; the first clamping plate 9 and the second clamping plate 10 are respectively engaged with the upper pressure plate 5 and the lower pressure plate 6, and the fastening bolt 14 passes through the horizontal base surface of the first clamping plate 9 and the second clamping plate 10 laterally, fastening the first clamping plate 9 and the second clamping plate 10 together; for the specific engaging and fastening method, please refer to the appendix. Figure 1 The results are shown below;
[0033] Both the first clamping plate 9 and the second clamping plate 10 are made of insulating material, such as polytetrafluoroethylene. Of course, in order to improve the reliability of the engagement, the engagement contact surfaces of the first clamping plate 9 and the second clamping plate 10 can be sanded to increase friction, or an insulating rubber layer can be adhered to the engagement contact surfaces.
[0034] The surface of the first clamping plate 9 on the lower pressure plate 6 is provided with a first conductive sheet 11, and the first conductive sheet 11 is provided with a lug 13 for holding the multimeter probes. The lug 13 should be exposed on the side. See Appendix 1 and Appendix 2 for details. Figure 3 This facilitates the clamping of the multimeter probes. The multimeter probes are clamped using traditional clips, such as alligator clips. The surface of the first clamping plate 9 on the upper pressure plate 5 is provided with a second conductive sheet 12.
[0035] The first conductive sheet 11 and the second conductive sheet 12 are made of one of the following materials: 304 stainless steel, silver, and copper; preferably 304 stainless steel. The metal sheets on the first conductive sheet 11 and the second conductive sheet 12 on the first clamp are in close contact with the sample to be tested. The multimeter probes for testing resistance are clamped on the lug 13. In the circuit formed by this, the effective resistance is the part of the sample between the two clamps. The contact resistance can be ignored, which greatly improves the accuracy of the test.
[0036] The thickness of the first conductive sheet 11 and the second conductive sheet 12 is 1-2 mm, preferably 1 mm. The surfaces of the first conductive sheet 11 and the second conductive sheet 12 are provided with anti-slip textures to increase friction and prevent relative slippage of the sample during clamping. The first conductive sheet 11 and the second conductive sheet 12 are bonded to the surface of the first clamping plate 9, and the bonding can be epoxy glue or other insulating adhesive. The screw holes on the first clamping plate 9 are threaded, while the second clamping plate 10 has threadless holes, facilitating the penetration of the second clamping plate 10 and the tightening operation of the bolt 14.
[0037] The fastening bolt 14 has several length specifications to accommodate upper pressure plate 5 or lower pressure plate 6 of different sizes, and can also improve the capacity to accommodate samples to be tested. It can test samples of different types and shapes such as yarn and fabric. The preferred length of the fastening bolt 14 is 15mm, 20mm, or 25mm. At the same time, the surface size of the lug is 5mm×10mm, the upper surface size of the first clamping plate is 15mm×30mm, and the thickness is 5mm; the upper surface size of the second clamping plate is 5mm×30mm, and the thickness is 5mm.
[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A dynamic resistance tester clamp, comprising two clamps symmetrically arranged on the left and right sides, a base, and a connecting beam; the lower ends of the clamps are connected to the base via the connecting beam; The chuck includes an upper pressure plate, a lower pressure plate, a rotating bolt, and a top plate and a bottom plate arranged in parallel, with the sides of the top plate and the bottom plate connected by a support beam; The lower pressure plate is set on the base plate, and the upper pressure plate is set above the upper pressure plate. A rotating bolt passes through the top plate and is rotatably connected to the upper pressure plate. The base plate is connected to the base via a connecting beam. Its features are: The upper and lower pressure plates are respectively provided with a first clamping plate and a second clamping plate with a right-angled cross-section; The first clamping plate and the second clamping plate are respectively clamped onto the upper pressure plate and the lower pressure plate, and the fastening bolts penetrate horizontally through the horizontal base surface of the first clamping plate and the second clamping plate to fasten the first clamping plate and the second clamping plate together. Both the first and second clamping plates are made of insulating material; the surface of the first clamping plate on the lower pressure plate is provided with a first conductive sheet, and the first conductive sheet is provided with a lug for holding the multimeter probes; the surface of the first clamping plate on the upper pressure plate is provided with a second conductive sheet.
2. The dynamic resistance tester clamp according to claim 1, characterized in that: The first and second conductive sheets are made of one of the following materials: 304 stainless steel, silver, or copper.
3. The dynamic resistance tester clamp according to claim 2, characterized in that: The thickness of the first and second conductive sheets is 1-2 mm.
4. The dynamic resistance tester clamp according to claim 3, characterized in that: The surfaces of the first and second conductive sheets are provided with anti-slip textures.
5. The dynamic resistance tester clamp according to claim 4, characterized in that: The first conductive sheet and the second conductive sheet are respectively bonded to the surface of the first clamping plate.
6. The dynamic resistance tester clamp according to claim 1, characterized in that: The screw holes on the first clamping plate are threaded, while the second clamping plate has holes without threads.
7. The dynamic resistance tester clamp according to claim 1, characterized in that: Fastening bolts are available in several length specifications.
8. The dynamic resistance tester clamp according to claim 1, characterized in that: A pair of guide rods are provided on the side of the upper pressure plate. The guide rods pass through the upper pressure plate and are connected to the top plate and the bottom plate at both ends respectively. They are located between the upper pressure plate and the bottom plate and are equipped with springs.