Loop resistance test clamp test device

Abstract

The utility model discloses a loop resistance test clamp test device, which relates to the technical field of resistance test, and comprises a test clamp main body, a middle shaft is arranged on one side of the test clamp main body, symmetrical contact arms are sleeved outside the middle shaft, and a guide limiting mechanism is arranged between the middle shaft and the contact arms. The guiding and limiting mechanism comprises a limiting block, the limiting block is connected to the outer portion of the middle shaft in a sleeving mode, a limiting groove is formed in one side of the limiting block, a telescopic rod is inserted into the limiting groove, one end of the telescopic rod is fixedly connected to one side of the contact arm, and a spring is movably connected to the outer portion of the telescopic rod. One end of the spring is fixedly connected to one side of the contact arm, connection with a tested object is realized through the external expansion wire clamp, a normal test function is realized, the external expansion wire clamp belongs to an external expansion state in a normal state, and the external expansion wire clamp contracts inwards in use, is placed in the contact hole and then returns to the normal state to be connected with the tested object after the test wire clamp is released. Therefore, the practicability and the flexibility of the device in use are improved.

Description

Technical Field

[0001] This utility model relates to the field of resistance testing technology, specifically a circuit resistance test clamp test device. Background Technology

[0002] Loop resistance test clamps are important circuit testing tools that help ensure circuit safety and stability. During use, operating procedures should be strictly followed, and relevant safety precautions should be observed.

[0003] Existing clamps used in loop resistance tests are typically inward-clamping clamps. However, in actual field tests, loop resistance is often measured at the connection cable ends, making traditional clamps unsuitable and failing to meet field requirements. Therefore, developing outward-expanding clamps is imperative.

[0004] Therefore, those skilled in the art have provided a loop resistance test clamp testing device to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a circuit resistance test clamp device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A loop resistance test clamp device includes a test clamp body. A central shaft is provided on one side of the test clamp body. Symmetrical contact arms are sleeved on the outside of the central shaft. A guide limiting mechanism is provided between the central shaft and the contact arms. The guide limiting mechanism includes a limiting block, which is sleeved on the outside of the central shaft. A limiting groove is formed on one side of the limiting block. A telescopic rod is inserted into the limiting groove. One end of the telescopic rod is fixedly connected to one side of the contact arm. A spring is movably connected to the outside of the telescopic rod. One end of the spring is fixedly connected to one side of the contact arm. The device is equipped with a guide groove, one end of which is adjacent to the central shaft, and the other end is close to one side of the contact arm. The test sample is connected through an expansion clamp to achieve normal testing function. The expansion clamp has contact arms at both ends and is connected to the central shaft in the middle. The central shaft has a spring connection inside, which can make the two contact arms expand outward. Under normal conditions, it is in an outward expansion state. When in use, it retracts inward and is placed in the contact hole. After the test clamp is released, it returns to the normal state to connect the test sample. This allows the device to be flexibly used for contact holes of different sizes, thereby improving the practicality and flexibility of the device in use.

[0008] As a further embodiment of this utility model: a mounting block is fixedly connected to one side of the contact arm, a fixing ring is inserted into one side of the mounting block, and a connecting block is fixedly connected to the other side of the contact arm. Threaded holes are provided on one side of both the connecting block and the fixing ring. Fasteners are threaded into the internal threads of the threaded holes. The fasteners securely fix the contact arm, mounting block, fixing ring, and connecting block together through the threaded connection, forming a stable and reliable overall structure. After the contact arm contacts the contact hole, the hole outside the fixing ring can be moved to overlap with the threaded hole, and then fixed by the fasteners, thereby fixing the contact arm and preventing it from shifting due to the elastic operation of the spring, thus ensuring the stability and safety of the measurement.

[0009] As a further embodiment of this utility model: a connecting connector is fixedly connected to one side of the test clamp body, a cable is inserted into the inside of the connecting connector, and an insulating sleeve is fitted over the outside of the cable. The cable is connected to the test clamp body through the connecting connector to form a complete current and voltage signal transmission channel. The insulating sleeve protects the cable and prevents it from making electrical contact with the external environment during transmission.

[0010] As a further improvement of this utility model: a conductive contact is provided on one side of the contact arm, and an indicator is provided on the top of the contact arm. As a visual aid, the indicator can remind the operator to pay attention to key steps in a complex measurement environment, reduce measurement errors caused by negligence, and thus help the operator avoid operational errors and improve the safety of use.

[0011] As a further embodiment of this utility model: a fixing block is fixedly connected to the bottom of the contact arm, a bracket is sleeved on the outside of the fixing block, a locking block is fixedly connected to one side of the fixing block, and the bracket is locked inside the locking block. The fixing block, the bracket, and the locking block together constitute the support and positioning structure of the circuit resistance test clamp test device, which ensures the positional stability of the contact arm during the measurement process and prevents the contact arm from shaking or shifting due to external force.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The test sample is connected via an external expansion clamp to achieve normal testing function. The external expansion clamp has contact arms at both ends and a central shaft in the middle. The central shaft has a spring connection inside, which can make the contact arms on both sides expand outward. Under normal conditions, it is in an outward expansion state. When in use, it retracts inward and is placed in the contact hole. After the test clamp is released, it returns to the normal state to connect the test sample. This allows the device to be flexibly used for contact holes of different sizes, thereby improving the practicality and flexibility of the device in use.

[0014] 2. Fasteners securely fasten the contact arm, mounting block, retaining ring, and connecting block together via threaded connections, forming a robust and reliable integrated structure. After the contact arm contacts the contact hole, the hole on the outside of the retaining ring can be moved to overlap with the threaded hole, and then fasteners can be used to fix it, thereby fixing the contact arm and preventing it from shifting due to the elasticity of the spring, thus ensuring the stability and safety of the measurement. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a loop resistance test clamp device. Figure 1 .

[0016] Figure 2 A schematic diagram of the three-dimensional structure of a loop resistance test clamp device. Figure 2 .

[0017] Figure 3 This is a partial three-dimensional enlarged structural diagram of a loop resistance test clamp test device.

[0018] Figure 4 A schematic diagram of the three-dimensional structure of a loop resistance test clamp device. Figure 3 .

[0019] In the diagram: 1. Test clamp body; 2. Central shaft; 3. Contact arm; 4. Guide and limiting mechanism; 5. Mounting block; 6. Fixing ring; 7. Connecting block; 8. Threaded hole; 9. Fastener; 10. Connecting joint; 11. Cable; 12. Insulating sleeve; 13. Conductive contact; 14. Indicator mark; 15. Fixing block; 16. Bracket; 17. Locking block; 401. Limiting block; 402. Limiting groove; 403. Telescopic rod; 404. Spring; 405. Guide groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Reference Figures 1-4This embodiment provides a loop resistance test clamp device, including a test clamp body 1. A central shaft 2 is provided on one side of the test clamp body 1. Symmetrical contact arms 3 are sleeved on the outside of the central shaft 2. A guide limiting mechanism 4 is provided at the middle of the central shaft 2 and the contact arms 3. The guide limiting mechanism 4 includes a limiting block 401, which is sleeved on the outside of the central shaft 2. A limiting groove 402 is formed on one side of the limiting block 401. A telescopic rod 403 is inserted into the limiting groove 402. One end of the telescopic rod 403 is fixedly connected to one side of the contact arm 3. A spring 40 is movably connected to the outside of the telescopic rod 403. 4. One end of the spring 404 is fixedly connected to one side of the contact arm 3. A guide groove 405 is provided on one side of the limiting block 401. One end of the guide groove 405 is adjacent to the central shaft 2, and the other end is close to one side of the contact arm 3. A mounting block 5 is fixedly connected to one side of the contact arm 3. A fixing ring 6 is inserted into one side of the mounting block 5. A connecting block 7 is fixedly connected to the other side of the contact arm 3. A threaded hole 8 is provided on one side of both the connecting block 7 and the fixing ring 6. A fastener 9 is threaded into the threaded hole 8. In use, the contact arm 3 is sleeved on the outside of the central shaft 2 and is symmetrically arranged. Its rotation range is limited by the guide limiting mechanism 4. The spring 404 is compressed, providing a restoring force for the contact arm 3. The fastener 9 secures the fixing ring 6 and connecting block 7 to the contact arm 3 via the threaded hole 8, ensuring the stability of the contact arm 3. When it is necessary to bring the test clamp into contact with the two ends of the resistor being measured, the contact arm 3 is manually squeezed. During the squeezing process, the telescopic rod 403 slides within the limiting groove 402, further compressing the spring 404. When the contact arm 3 is squeezed to the appropriate position, it contacts the two ends of the resistor being measured. The elasticity of the spring 404 ensures a tight contact between the contact arm 3 and the resistor being measured, improving measurement accuracy. After holding the resistor to be measured, apply current through an external testing instrument (such as a loop resistance tester). When the current passes through the resistor, a voltage drop will be generated. The external testing instrument collects the analog signal of the voltage drop through the sampling circuit. After being amplified by a preamplifier and converted into a digital signal by an A / D converter, the data is processed and analyzed to obtain the resistance value of the resistor to be measured. After the measurement is completed, manually rotate the fastener 9 to move the fixing ring 6 out of the threaded hole 8 and untie the contact arm 3. Under the action of the reset force, the spring 404 pushes the contact arm 3 back to the initial position for easy use next time.

[0023] Example 2

[0024] Reference Figures 1-4This embodiment is based on the previous embodiment, but differs in that a connecting connector 10 is fixedly connected to one side of the test clamp body 1. A cable 11 is inserted into the connecting connector 10, and an insulating sleeve 12 is fitted over the cable 11. A conductive contact 13 is provided on one side of the contact arm 3, an indicator mark 14 is provided on the top of the contact arm 3, a fixing block 15 is fixedly connected to the bottom of the contact arm 3, a bracket 16 is fitted over the fixing block 15, and a locking block 17 is fixedly connected to one side of the fixing block 15. The bracket 16 is locked inside the locking block 17. Through the connecting connector 10, the cable 11 is connected to the test clamp body 1, forming a complete current and voltage signal transmission channel. The insulating sleeve 12 protects the cable 11 from... To prevent electrical contact with the external environment during transmission, when it is necessary to measure the circuit resistance, manually squeeze the contact arm 3 to make the conductive contact 13 make tight contact with the two ends of the resistor being measured. The indicator 14 helps the operator to better understand the specific information of the contact arm 3. The external testing instrument applies current to the resistor being measured through the cable 11 and measures the resulting voltage drop. At the same time, the fixing block 15 and the bracket 16 provide support for the contact arm 3 during use. After the measurement is completed, manually rotate the fastener 9 to move the fixing ring 6 out of the threaded hole 8 and untie the contact arm 3. Under the action of the reset force, the spring 404 pushes the contact arm 3 back to the initial position, so that the conductive contact 13 is separated from the resistor being measured for easy use next time.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 circuit resistance test clip testing device comprising a test clip main body (1), characterized in that, The side of the test clamp body (1) is provided with a middle shaft (2), the outside of the middle shaft (2) is sleeved with symmetrical touch arms (3), the middle part of the middle shaft (2) and the touch arms (3) is provided with a guide limiting mechanism (4), the guide limiting mechanism (4) comprises a limiting block (401), the limiting block (401) is sleeved outside the middle shaft (2), one side of the limiting block (401) is provided with a limiting groove (402), the inside of the limiting groove (402) is inserted with a telescopic rod (403), one end of the telescopic rod (403) is fixedly connected on one side of the touch arm (3), the outside of the telescopic rod (403) is movably connected with a spring (404), one end of the spring (404) is fixedly connected on one side of the touch arm (3), one side of the limiting block (401) is provided with a guide groove (405), one end of the guide groove (405) is adjacent to the middle shaft (2), and the other end is close to one side of the touch arm (3).

2. A loop resistance test clip testing device according to claim 1, wherein, The side of the touch arm (3) is fixedly connected with a mounting block (5), one side of the mounting block (5) is inserted with a fixed ring (6), the other side of the touch arm (3) is fixedly connected with a connecting block (7), the side of the connecting block (7) and the fixed ring (6) is provided with a threaded hole (8), and the inside of the threaded hole (8) is screwed with a fastener (9).

3. A circuit resistance test clip testing device according to claim 1, wherein The side of the test clamp body (1) is fixedly connected with a connecting joint (10), the inside of the connecting joint (10) is inserted with a cable (11), and the outside of the cable (11) is sleeved with an insulating sleeve (12).

4. The circuit resistance test clip testing apparatus of claim 1, wherein, The side of the touch arm (3) is provided with a conductive contact (13), and the top of the touch arm (3) is provided with an indication mark (14).

5. The circuit resistance test clip testing apparatus of claim 1, wherein, The bottom of the touch arm (3) is fixedly connected with a fixed block (15), the outside of the fixed block (15) is sleeved with a support (16), one side of the fixed block (15) is fixedly connected with a clamping block (17), and the support (16) is clamped in the inside of the clamping block (17).

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