Large opening type loop resistance test clamp
By designing a large-opening circuit resistance test clip, the C-type main frame and adjustment components increase the opening of the voltage clip, the problem of insufficient opening size in the prior art is solved, and effective clamping of leads or cables with thick diameters is achieved. Persist and test.
Patent Information
- Application Number
- CN202422775034.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-11-14
AI Technical Summary
The opening size of the existing loop resistance test clip is insufficient, making it difficult to apply to lead wires or cable lap surfaces with thick diameters, resulting in difficult testing.
A large-opening circuit resistance test clip is designed, using C-type main frame, voltage clip, insulating clip, movable slider and adjustment component. The movable slider is driven to move through the adjustment component, and the voltage clip and main frame are increased. The opening between the two is suitable for thick-diameter leads or cable lap surfaces, and is connected to the loop resistance tester through wiring components.
It realizes effective clamping and testing of leads or cables with thick diameters, which is easy to use and increases the scope of application of test clips.
Smart Images
Figure CN222212838U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical measurement, in particular to a large-opening loop resistance testing clamp. Background Art
[0002] Whether it is a circuit breaker or a switch cabinet, loop resistance testing is an indispensable item in factory testing. The loop resistance tester made using the principle of the Kelvin four-wire detection method has a test clamp connected to the wire whose internal resistance will not affect the resistance value of the measured loop resistance, and is widely used by domestic switch manufacturers. This type of loop resistance tester has two current supply wires and two voltage detection wires, and the ends of the wires are connected to test clamps. For example, a loop resistance test clamp proposed by prior art announcement number CN216526036U includes: a clamp head, a screw and an insulating shell, the clamp head is connected to the insulating shell and the voltage detection wire by a screw, and another set of clamp heads, screws and insulating shells are connected to the current supply wires in the same way. The middle sections of the two insulating shells are connected by a pin shaft, and a through hole is set at the front end. The insulating pin shaft passes through the through hole, and the outer diameter of both ends is larger than the inner diameter of the through hole. The spring is nested in the insulating pin shaft and is located between the two shells. During the test, it is necessary to face various test objects for clamping and passing the current. However, the opening size of the conventional loop resistance test clamp is limited and is suitable for general test objects. Some special test items, such as leads with large diameters or cable overlaps, need to be clamped using a fixture with a particularly large opening, so it is necessary to design a large-opening loop resistance test clamp. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a large-opening loop resistance test clamp which can be applied to the overlapping surface of leads or cables with large diameters and is easy to use.
[0004] The utility model discloses a large-opening loop resistance test clamp, comprising a main frame, a voltage clamp, an insulating sheet, a movable slider, an adjustment component and a wiring component. The main frame is set to a C shape, the movable slider slides inside the main frame, a central circular hole is opened at the bottom of the movable slider, threaded through holes are opened on the left and right sides of the central circular hole, two stepped holes are opened on the top of the insulating sheet, and the stepped holes are aligned with the two threaded through holes of the movable slider, an arc-shaped clamping groove is set at the opposite end of the top of the main frame and the top of the voltage clamp, two through holes are opened on the left and right sides of the top of the voltage clamp, and the edges of the through holes are chamfered to be inserted Countersunk screws, two blind holes with threads are set on the upper surface of the insulating sheet, the blind holes are aligned with the through holes of the voltage clamp, the voltage clamp, the insulating sheet and the movable slider are fixedly connected by screws, and the voltage clamp and the movable slider are insulated; the C-shaped main frame can enlarge the opening between the voltage clamps, and the product to be tested can be clamped in, which is suitable for the overlapped surface of leads or cables with large diameters, and is easy to use. The movable slider is pushed to move by adjusting the component, and the opening between the voltage clamp and the main frame is adjusted so that the product to be tested is clamped between the main frame and the voltage clamp, and connected to the loop resistance tester through the wiring component.
[0005] Preferably, the adjusting component includes a spring, a butterfly nut and a lead screw, a limited through hole is provided in the top of the lead screw and the center circular hole of the movable slider, the top of the lead screw is inserted into the center circular hole of the movable slider, a through hole is provided at the bottom end of the main frame, the lead screw passes through the through hole, a groove is provided on the right side wall of the movable slider, a raised slide rail is provided at the central part of the main frame, the groove of the movable slider is slidably embedded in the raised slide rail of the main frame, the spring is sleeved on the outer wall of the lead screw, the top of the spring contacts the bottom of the movable slider, the bottom end of the spring contacts the bottom of the main frame, and the lead screw is threaded with a butterfly nut at the lower part of the through hole of the main frame; the top of the lead screw is inserted into the center circular hole of the movable slider so that the limited through hole of the lead screw is aligned with the limited through hole in the center circular hole of the movable slider, a screw is inserted from the outside and tightened with the nut to fix the lead screw and the movable slider together, and the distance between the voltage clip and the upper part of the main frame can be adjusted by rotating the adjusting butterfly nut.
[0006] Preferably, the wiring assembly includes a voltage line nose and a current line nose, the voltage clip has a through hole on the outside, which is fixed to the voltage line nose by screws, and the upper outside of the main frame has a through hole, which is fixed to the current line nose by screws; the voltage line nose is connected to the voltage line of the loop resistance tester, and the current line nose is connected to the current line of the loop resistance tester.
[0007] Preferably, the main frame, the voltage clamp and the movable slider are conductors; the main frame, the voltage clamp and the movable slider may be made of brass or aluminum alloy.
[0008] Preferably, the insulating sheet is an insulator; the insulating sheet may be made of nylon or Teflon material.
[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: the C-shaped main frame can enlarge the opening between the voltage clamps, so that the product to be tested can be clamped in. It is suitable for the overlapped surfaces of leads or cables with large diameters, and is easy to use. The movable slider is pushed to move by adjusting the assembly to adjust the opening between the voltage clamp and the main frame, so that the product to be tested is clamped between the main frame and the voltage clamp, and connected to the loop resistance tester through the wiring assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of the utility model;
[0011] Figure 2 It is a front cross-sectional structural schematic diagram of the utility model;
[0012] Figure 3 It is a schematic diagram of the connection between the movable slider and the lead screw of the utility model.
[0013] Markings in the attached figure: 1. main frame; 2. voltage clamp; 3. insulating sheet; 4. movable slider; 5. spring; 6. butterfly nut; 7. lead screw; 8. voltage line nose; 9. current line nose. DETAILED DESCRIPTION
[0014] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.
[0015] like Figures 1 to 3As shown, the main frame 1 is set to be C-shaped, and the movable slider 4 is slidably located inside the main frame 1. A central circular hole is provided at the bottom of the movable slider 4, and threaded through holes are provided on the left and right sides of the central circular hole. Two stepped holes are provided on the top of the insulating sheet 3, and the stepped holes are aligned with the two threaded through holes of the movable slider 4. An arc-shaped clamping groove is provided at the end opposite to the top of the main frame 1 and the top of the voltage clamp 2. Two through holes are provided on the left and right sides of the top of the voltage clamp 2. The edges of the through holes are chamfered and countersunk screws can be inserted. Two blind holes with threads are provided on the upper surface of the insulating sheet 3, and the blind holes are aligned with the through holes of the voltage clamp 2. The voltage clamp 2, the insulating sheet 3 and the movable slider 4 are fixedly connected by screws, and the voltage clamp 2 and the movable slider 4 are insulated. A limiting through hole is provided, the top of the lead screw 7 is inserted into the central circular hole of the movable slider 4, a through hole is provided at the bottom end of the main frame 1, the lead screw 7 passes through the through hole, a groove is provided on the right side wall of the movable slider 4, a raised slide rail is provided at the central part of the main frame 1, the groove of the movable slider 4 is slidably embedded in the raised slide rail of the main frame 1, a spring 5 is sleeved on the outer wall of the lead screw 7, the top of the spring 5 contacts the bottom of the movable slider 4, the bottom of the spring 5 contacts the bottom of the main frame 1, the lead screw 7 is screwed with a butterfly nut 6 at the lower part of the through hole of the main frame 1, a through hole is provided on the outer side of the voltage clip 2, and is fixed to the voltage line nose 8 by screws, a through hole is provided on the outer side of the upper part of the main frame 1, and is fixed to the current line nose 9 by screws, the main frame 1, the voltage clip 2 and the movable slider 4 are conductors, and the insulating sheet 3 is an insulator;
[0016] The C-shaped main frame 1 can enlarge the opening between the voltage clips 2, so that the product to be tested can be clamped in. It is suitable for the overlapped surface of leads or cables with large diameters and is easy to use. The top of the lead screw 7 is inserted into the central circular hole of the movable slider 4, so that the limit through hole of the lead screw 7 is aligned with the limit through hole in the central circular hole of the movable slider 4. The screw is inserted from the outside and tightened with the nut to fix the lead screw 7 and the movable slider 4 together. The distance between the voltage clip 2 and the upper part of the main frame 1 can be adjusted by rotating the adjusting butterfly nut 6. The voltage line nose 8 is connected to the voltage line of the loop resistance tester, and the current line nose 9 is connected to the current line of the loop resistance tester. The main frame 1, the voltage clip 2 and the movable slider 4 can be made of brass or aluminum alloy materials, and the insulating sheet 3 can be made of nylon or Teflon material.
[0017] like Figures 1 to 3 As shown, the utility model is a large-opening loop resistance test clamp. When it is working, the voltage line nose 8 is connected to the voltage line of the loop resistance tester, the current line nose 9 is connected to the current line of the loop resistance tester, the top of the lead screw 7 is inserted into the central circular hole of the movable slider 4, the limit through hole of the lead screw 7 is aligned with the limit through hole in the central circular hole of the movable slider 4, the screw is inserted from the outside, and the nut is tightened to fix the lead screw 7 and the movable slider 4 together, the butterfly nut 6 is rotated to adjust the distance between the voltage clamp 2 and the upper part of the main frame 1, and the product to be tested is clamped in.
[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A large opening type loop resistance test clip, It is characterized in that The invention comprises a main frame (1), a voltage clamp (2), an insulating sheet (3), a movable slider (4), an adjustment component and a wiring component. The main frame (1) is set to be C-shaped. The movable slider (4) is slidably located inside the main frame (1). A central circular hole is opened at the bottom of the movable slider (4). Threaded through holes are opened on the left and right sides of the central circular hole. Two stepped holes are opened at the top of the insulating sheet (3). The stepped holes are aligned with the two threaded through holes of the movable slider (4). An arc-shaped clamping groove is set at the opposite end of the top of the main frame (1) and the top of the voltage clamp (2). Two through holes are opened on the left and right sides of the top of the voltage clamp (2). The edges of the through holes are chamfered and countersunk screws can be inserted. Two blind holes with threads are opened on the upper surface of the insulating sheet (3). The blind holes are aligned with the through holes of the voltage clamp (2). The voltage clamp (2), the insulating sheet (3) and the movable slider (4) are fixedly connected by screws. The voltage clamp (2) and the movable slider (4) are insulated.
2. A large opening type loop resistance test clamp as claimed in claim 1, It is characterized in that The adjustment component comprises a spring (5), a butterfly nut (6) and a lead screw (7). A limit through hole is provided at the top of the lead screw (7) and in the central circular hole of the movable slider (4). The top of the lead screw (7) is inserted into the central circular hole of the movable slider (4). A through hole is provided at the bottom of the main frame (1). The lead screw (7) passes through the through hole. A groove is provided on the right side wall of the movable slider (4). A raised slide rail is provided at the central part of the main frame (1). The groove of the movable slider (4) is slidably embedded in the raised slide rail of the main frame (1). The spring (5) is sleeved on the outer wall of the lead screw (7). The top of the spring (5) contacts the bottom of the movable slider (4). The bottom of the spring (5) contacts the bottom of the main frame (1). The lead screw (7) is threaded with a butterfly nut (6) at the lower part of the through hole of the main frame (1).
3. A large opening type loop resistance test clip as claimed in claim 1, It is characterized in that The wiring assembly comprises a voltage line nose (8) and a current line nose (9), the voltage clip (2) has a through hole on the outside and is fixed to the voltage line nose (8) by screws, and the upper part of the main frame (1) has a through hole on the outside and is fixed to the current line nose (9) by screws.
4. A large opening type loop resistance test clip as claimed in claim 1, It is characterized in that The main frame (1), the voltage clamp (2) and the movable slider (4) are electrical conductors.
5. A large opening type loop resistance test clamp as claimed in claim 1, It is characterized in that The insulating sheet (3) is an insulator.