A contact resistance testing device

Abstract

The utility model discloses a contact resistance testing arrangement relates to resistance test technical field, include: test subassembly, test subassembly is used for testing connector cable, support avoidance mechanism, support avoidance mechanism is used for guiding connector cable fixing mechanism in the testing process, and connector cable fixing mechanism, connector cable fixing mechanism includes the fixed frame of fixed setting in the top of base, the fixed frame top fixed setting has electric push rod and is used for controlling electric push rod output shaft telescopic control switch, the output shaft of electric push rod is along vertical direction and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with fixed plate and is fixedly connected with

Description

Technical Field

[0001] This utility model relates to the field of resistance testing technology, and in particular to a contact resistance testing device. Background Technology

[0002] When testing and screening connectors for external cables, it is necessary to first use wire strippers to peel off the cable sheath or use a piercing tool to puncture the cable sheath before placing the connector on the testing device for testing. This process is inefficient, and the stripped area is prone to oxidation after the cable sheath is peeled off, which in turn affects the use of the connector.

[0003] To avoid the above situation, the prior art utility model patent with authorization announcement number CN221485528U discloses a contact resistance testing device that can directly test the contact resistance of the connector without having to use wire strippers to peel off the cable sheath or use a piercing tool to pierce the cable sheath beforehand.

[0004] However, the above solution still has some drawbacks. For example, after placing the two connector cables to be tested into the corresponding crimping slots, in order to prevent the connector cables from falling out of the crimping slots, the operator needs to continuously use both hands to pick up the connector cables until the crimping protrusions descend to fix the connector cables. However, the descent of the crimping protrusions requires the tester to manually operate the manual reversing valve. This causes the connector cables to easily fall out of the corresponding crimping slots when the tester operates the manual reversing valve, thus affecting the normal progress of the test process. This makes the above test device inconvenient in actual use.

[0005] Therefore, it is necessary to invent a contact resistance testing device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a contact resistance testing device that can quickly fix connector cables of different specifications through friction. It is applicable to the testing of connector cables of different specifications and can also prevent the connector cables under test from falling off. It is more convenient to use in practice and solves the problem mentioned in the background art that when the tester operates the manual reversing valve, the connector cable is easy to fall out of the corresponding pressure groove, which affects the normal progress of the test process and makes the above-mentioned testing device inconvenient to use in practice.

[0007] According to one aspect of this disclosure, the following technical solution is provided: a contact resistance testing device, comprising:

[0008] A test assembly for testing connector cables;

[0009] A support and avoidance mechanism, used to guide the connector cable fixing mechanism during testing; and

[0010] A connector cable fixing mechanism includes a fixing frame fixedly mounted on the top of a base. An electric push rod and a control switch for controlling the extension and retraction of the electric push rod's output shaft are fixedly mounted on the top of the fixing frame. The output shaft of the electric push rod passes vertically through the fixing frame and is fixedly connected to a fixing plate. Multiple parallel fixing channels are provided on both sides of the fixing plate to accommodate connector cables of different specifications. A rough surface is provided on the inner side of each fixing channel to increase friction with the outer wall of the connector cable. Multiple clearance holes are provided at the bottom of each fixing channel to avoid test probes. Guide grooves are provided at the four corners of the top of each fixing channel to match adjacent guide posts.

[0011] According to at least one embodiment of the contact resistance testing apparatus of the present disclosure, the testing component includes a base, and a resistance tester is fixedly disposed on the rear top side of the base.

[0012] According to at least one embodiment of the contact resistance testing device of the present disclosure, a PCB circuit board connected to a resistance tester is fixedly disposed on the front top of the base, and a plurality of test probes are soldered onto the top of the PCB circuit board.

[0013] According to at least one embodiment of the contact resistance testing device of this disclosure, the support clearance mechanism includes a positioning frame fixedly disposed on the front side of the top of the base, and multiple clearance slots corresponding to adjacent fixed channels are opened on the top of both sides of the positioning frame, and wiring slots are opened on the bottom of both sides of the positioning frame, with the PCB circuit board located between two wiring slots.

[0014] According to at least one embodiment of the contact resistance testing device of this disclosure, a support base is fixedly disposed in the middle of the inner side of the positioning frame, the support base is slidably sleeved on the outside of a plurality of test probes, and guide posts are fixedly disposed at the four corners of the top of the support base and slidably disposed in the inner side of adjacent guide grooves in the vertical direction. A plurality of reset springs are uniformly fixedly disposed on the top of the support base.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] This invention features a connector cable fixing mechanism, allowing for manual insertion of the connector cable into the corresponding fixing channel during testing. The connector cable is then fixed in place by friction. A control switch activates an electric push rod, extending its output shaft. This causes the fixing plate to continuously lower the connector cable. As the cable descends, the corresponding test probe passes through the clearance hole and enters the fixing channel, then inserts into the connector cable under test, contacting the internal wire core to complete the testing process. Compared to existing technologies, this invention uses friction to quickly fix connector cables of different specifications, making it suitable for testing various connector cable sizes and preventing the cable from falling out, thus offering greater convenience in practical use. Attached Figure Description

[0017] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0018] Figure 1 This is a schematic diagram of the overall structure of a contact resistance testing device according to one embodiment of the present disclosure.

[0019] Figure 2 This is a schematic diagram of the test component structure of a contact resistance testing apparatus according to one embodiment of the present disclosure.

[0020] Figure 3 This is a schematic diagram of the support and clearance mechanism and connector cable fixing mechanism of a contact resistance testing device according to one embodiment of the present disclosure.

[0021] The specific labels in the attached figures are as follows:

[0022] 1. Test components; 11. Base; 12. Resistance tester; 13. PCB circuit board; 14. Test probes;

[0023] 2. Support and clearance mechanism; 21. Positioning frame; 22. Clearance groove; 23. Wiring groove; 24. Support base; 25. Guide post; 26. Return spring;

[0024] 3. Connector cable fixing mechanism; 31. Fixing frame; 32. Electric push rod; 33. Fixing plate; 34. Fixing channel; 35. Guide groove. Detailed Implementation

[0025] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” other components or features would subsequently be positioned “above” said other components or features. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0026] Figure 1 This is a schematic diagram of the overall structure of a contact resistance testing device according to one embodiment of the present disclosure.

[0027] Figure 2 This is a schematic diagram of the test component 1 of a contact resistance testing apparatus according to one embodiment of the present disclosure.

[0028] Figure 3 This is a schematic diagram of the support and clearance mechanism 2 and the connector cable fixing mechanism 3 of a contact resistance testing device according to one embodiment of the present disclosure.

[0029] like Figures 1-3 As shown, the contact resistance testing device disclosed herein mainly consists of three parts: a testing component 1, a support and clearance mechanism 2, and a connector cable fixing mechanism 3. The three parts work together to achieve efficient and stable testing of the contact resistance of the connector cable.

[0030] like Figure 2As shown in this disclosure, the test component 1 includes a base 11 made of high-strength insulating material, serving as the mounting base for the entire device. Anti-slip pads are provided at the bottom to ensure the device remains stable and does not wobble during testing. A resistance tester 12 is fixedly mounted on the rear top of the base 11. A high-precision digital resistance tester is selected, capable of displaying test data in real time and supporting data storage for easy subsequent traceability. A PCB circuit board 13, connected to the resistance tester 12, is fixedly mounted on the front top of the base 11. It is electrically connected to the resistance tester 12 via a shielded cable, serving as an intermediate carrier for test signal transmission. Its surface is covered with an anti-oxidation coating to extend its service life. Multiple test probes 14 are soldered to the top of the PCB circuit board 13. These probes are made of tungsten alloy (high hardness and good conductivity), and their tips are specially polished (tip diameter 0.1-0.3mm) to accurately pierce the cable sheath and contact the wire core, avoiding excessive damage. The aforementioned test component 1 is prior art, and therefore will not be described further in this application.

[0031] like Figure 3 As shown, in a preferred embodiment, the support and avoidance mechanism 2 includes a positioning frame 21 fixedly disposed on the front side of the top of the base 11. The frame is made of transparent insulating acrylic sheet, which facilitates observation of the testing process and prevents external dust and impurities from contaminating the probes. It also avoids the risk of electric shock caused by operators accidentally touching the probes. Multiple avoidance grooves 22 corresponding to adjacent fixed channels 34 are opened on the top of both sides of the positioning frame 21. Wiring grooves 23 are opened on the bottom of both sides of the positioning frame 21. The PCB circuit board 13 is located between two wiring grooves 23. A support base 24 made of lightweight aluminum alloy is fixedly disposed in the middle of the inner side of the positioning frame 21. The support base 24 is slidably sleeved on the outside of multiple test probes 14 to provide auxiliary support for the test probes 14 and prevent the test probes 14 from bending and deforming due to excessive force. Guide posts 25 are fixedly disposed at the four corners of the top of the support base 24 and are slidably disposed in the inner side of adjacent guide grooves 35 in the vertical direction. Multiple return springs 26 are evenly fixedly disposed on the top of the support base 24.

[0032] Therefore, the positioning frame 21 can be used to shield and protect the PCB circuit board 13 and the test probe 14. The clearance groove 22 can be set to avoid the connector cable when the fixed plate 33 drives the connector cable to descend for testing. The wiring groove 23 can avoid the connecting wires between the base 11 and the PCB circuit board 13. The guide post 25 can guide the fixed plate 33 during the lifting and lowering process.

[0033] like Figure 3As shown in this disclosure, the connector cable fixing mechanism 3 includes a fixing frame 31 fixedly mounted on the top of the base 11, which is spliced ​​from metal profiles (such as aluminum profiles). An electric push rod 32 and a control switch for controlling the extension and retraction of the output shaft of the electric push rod 32 are fixedly mounted on the top of the fixing frame 31. The electric push rod 32 is a DC electric push rod (rated voltage 24V, thrust 50-100N, stroke 50-80mm). The control switch adopts a dual-button design ("down" and "up"), and the button surface has anti-slip texture, supporting inching control (press to activate, release to stop), ensuring that the operator can interrupt the operation at any time, improving safety. The electric push rod 32... The output shaft passes vertically through the fixing frame 31 and is fixedly connected to the fixing plate 33, which is made of insulating phenolic resin board. The fixing plate 33 has multiple parallel fixing channels 34 on both sides to adapt to different specifications of connector cables. Each fixing channel 34 has a rough surface on its inner side to increase the friction between the cable and the outer wall of the connector cable. By increasing the friction with the outer wall of the cable, the cable is pre-fixed to prevent it from slipping during lifting. Each fixing channel 34 has multiple clearance holes at its bottom to avoid the test probe 14. Each fixing channel 34 has guide grooves 35 at its top four corners to match the adjacent guide post 25.

[0034] Therefore, during actual testing, the connector cable is manually inserted into the corresponding fixed channel 34. At this time, the connector cable is fixed inside the fixed channel 34 by friction. Then, the electric push rod 32 is driven by the control switch to extend its output shaft, which in turn causes the fixed plate 33 to continuously move the connector cable downward. During this process, the guide post 25 and the guide groove 35 guide the fixed plate 33. As the connector cable moves downward, the corresponding test probe 14 passes through the clearance hole and enters the corresponding fixed channel 34. Then, it is inserted into the inside of the connector cable to be tested and contacts the wire core inside the connector cable, thus completing the testing process. After the test is completed, the electric push rod 32 is driven by the control switch to move its output shaft upward to reset. Compared with the existing technology, the friction can quickly fix connector cables of different specifications, which is applicable to the testing operation of connector cables of different specifications. At the same time, it can also prevent the connector cable under test from falling out, making it more convenient in actual use.

[0035] It should also be noted that any content not described in detail in this specification is prior art known to those skilled in the art.

[0036] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A contact resistance testing device, characterized in that, include: A test component for testing connector cables; A support and avoidance mechanism is provided to guide the connector cable fixing mechanism during testing. as well as A connector cable fixing mechanism includes a fixing frame fixedly mounted on the top of a base. An electric push rod and a control switch for controlling the extension and retraction of the electric push rod's output shaft are fixedly mounted on the top of the fixing frame. The output shaft of the electric push rod passes vertically through the fixing frame and is fixedly connected to a fixing plate. Multiple parallel fixing channels are provided on both sides of the fixing plate to accommodate connector cables of different specifications. A rough surface is provided on the inner side of each fixing channel to increase friction with the outer wall of the connector cable. Multiple clearance holes are provided at the bottom of each fixing channel to avoid test probes. Guide grooves are provided at the four corners of the top of each fixing channel to match adjacent guide posts.

2. The contact resistance testing device according to claim 1, characterized in that: The test assembly includes a base, and a resistance tester is fixedly mounted on the top rear side of the base.

3. The contact resistance testing device according to claim 2, characterized in that: A PCB circuit board connected to a resistance tester is fixedly installed on the front top of the base, and multiple test probes are soldered onto the top of the PCB circuit board.

4. The contact resistance testing device according to claim 3, characterized in that: The support and avoidance mechanism includes a positioning frame fixedly installed on the front side of the top of the base. Multiple avoidance slots corresponding to adjacent fixed channels are opened on the top of both sides of the positioning frame. Wiring slots are opened on the bottom of both sides of the positioning frame. The PCB circuit board is located between two wiring slots.

5. The contact resistance testing device according to claim 4, characterized in that: A support base is fixedly installed in the middle of the inner side of the positioning frame. The support base is slidably sleeved on the outside of multiple test probes. Guide posts are fixedly installed at the four corners of the top of the support base and slidably installed in the inner side of adjacent guide grooves in the vertical direction. Multiple reset springs are evenly fixedly installed on the top of the support base.

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