Wire harness on-off tester

Abstract

The invention discloses a wire harness on-off tester, and relates to the technical field of electrical detection, the wire harness on-off tester comprises an instrument main body, a test point electrically connected with the instrument main body, and a test mechanism arranged on the front surface of the instrument main body and comprising a plurality of guide rods inserted at the lower end of the front surface of the instrument main body, the front ends of the multiple guide rods are fixedly connected with a test platform, the test point is fixedly connected with the front end of the test platform, two guide frames are inserted into the rear end of the test platform, a rotating plate is rotationally connected between the two guide frames, and the two ends of the front surface of the rotating plate are fixedly connected with covering frames; the front ends of the two covering frames are fixedly connected with a transverse plate, and a plurality of lower pressing blocks are inserted into the transverse plate in a sliding mode, so that the problems that a large amount of manpower and time need to be consumed for wire harness testing, mistakes and omissions are likely to occur due to the large number, and the wire harness testing result is affected are solved.

Description

Technical Field

[0001] This invention relates to the field of electrical testing technology, and more specifically, to a wire harness continuity tester. Background Technology

[0002] A wire harness continuity tester is a specialized device used to test the quality of electrical connections in wire harnesses. Its core function is to determine whether there are faults such as open circuits, short circuits, incorrect connections, or poor contacts in the wire harness by applying voltage and measuring the resistance value.

[0003] Wire harnesses consist of multiple wires. Therefore, when testing a wire harness continuity tester, one end of the wire harness needs to be connected to the tester's interface, and then the other end of the wire harness, with its multiple exposed wires, needs to be brought into contact with the test points in sequence. However, since a wire harness consists of a large number of wires, testing them one by one manually would consume a significant amount of manpower and time, and the large number of wires could easily lead to errors or omissions, affecting the test results. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a wire harness continuity tester to solve the problems that wire harness testing requires a lot of manpower and time, and that large quantities are prone to errors and omissions, which affect the test results.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A wire harness continuity tester includes an instrument body and test points, the test points being electrically connected to the instrument body, and a test mechanism disposed on the front surface of the instrument body. The test mechanism includes multiple guide rods inserted into the lower end of the front surface of the instrument body, a test platform fixedly connected to the front end of the multiple guide rods, the test points being fixedly connected to the front end of the test platform, two guide frames inserted into the rear end of the test platform, a rotating plate rotatably connected between the two guide frames, a cover frame fixedly connected to both ends of the front surface of the rotating plate, a horizontal plate fixedly connected to the front end of the two cover frames, multiple pressing blocks slidably inserted inside the horizontal plate, a motor fixedly connected to the upper left surface of the horizontal plate, a lead screw fixedly connected to the output shaft of the motor, a moving block threaded onto the surface of the lead screw, and a pressure roller rotatably connected to the front surface of the moving block.

[0007] Furthermore, a groove is formed on the upper surface of the horizontal plate, and the moving block is slidably connected to the inside of the groove.

[0008] Furthermore, a plurality of side blocks are fixedly connected to the front surface of the horizontal plate, a side plate is fixedly connected to the front surface of the lower pressing block, and a spring is fixedly connected between the side plate and the side blocks.

[0009] Furthermore, a combing strip is fixedly connected to the lower surface of the horizontal plate, and a plurality of grooves for cooperating with the wires are opened on the lower surface of the combing strip. A support plate is inserted inside the combing strip, and a handle is fixedly connected to the right end of the support plate.

[0010] Furthermore, an end-processing mechanism is provided, which is disposed on the front surface of the horizontal plate. The end-processing mechanism includes multiple mounting brackets fixedly connected to the front surface of the horizontal plate. The multiple mounting brackets are arranged in pairs. A movable bracket is provided at the transverse arm end of the mounting bracket. A strip-shaped through hole is opened through the surface of the movable bracket. A telescopic section is sleeved at the transverse arm end of the mounting bracket. The telescopic section is slidably inserted into the interior of the strip-shaped through hole. A clamping block is fixedly connected to the bottom end of the movable bracket.

[0011] Furthermore, a transverse slide rod is fixedly connected to the top of each of the two mounting brackets, a movable plate is slidably fitted onto the surface of the transverse slide rod, two longitudinal slide rods are inserted into the lower surface of the movable plate, a closing plate is fixedly connected to the lower end of the two longitudinal slide rods, a V-shaped groove is formed on the lower surface of the closing plate, and a connecting crossbar is fixedly connected to the front surface of the plurality of closing plates.

[0012] Furthermore, the upper and lower surfaces of the clamping block are both fixedly connected to a bracket, the surface of the bracket is fixedly connected to an airbag, and the arc surface of the airbag is fixedly connected to sandpaper.

[0013] Furthermore, an air guide hose is fixedly inserted inside the mobile frame, and the air guide hose is connected to multiple airbags.

[0014] Furthermore, an air pump is fixedly connected to the right end of the upper surface of the horizontal plate, and the air outlet of the air pump is connected to the right end of the air guide hose.

[0015] Furthermore, the left end of the air-conducting hose is designed with an open vent.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) This solution utilizes the orderly operation of the moving block pressure rollers, which sequentially press over each lower pressure block. During this process, the lower pressure blocks move downwards sequentially, thereby generating a downward pushing force on the wires and causing them to bend downwards in sequence. Through this operation method, multiple wires in the wire harness can be tested sequentially, completely eliminating the cumbersome mode of relying on manual testing one by one, and significantly reducing the manpower and time costs required during the testing process.

[0018] (2) During the implementation of this solution, since there are gaps at the roots of the exposed parts of the wires, the lower end of the combing strip can be inserted into the gaps between the exposed roots of multiple wires. At the same time, the cable will be embedded in the corresponding groove on the combing strip. Then the operator pushes the combing strip forward, and the originally scattered and disordered wires will be separated in an orderly manner, which can effectively prevent multiple wires from crossing and tangling with each other, thereby significantly reducing the adverse effects on the wire testing efficiency caused by the messy wires.

[0019] (3) This solution uses two clamps to hold the exposed wires on the wire, and then pulls the clamps forward. Since each clamp only forms two contact points with the exposed wires on the wire, the clamps can gradually straighten the exposed metal wires that may be bent, messy and short as they move along the surface of the exposed wires, and restore them to a flat and straight state. This avoids the wires from accidentally contacting the test points due to bending, thereby preventing abnormal situations such as interference signals or short circuits, and ensuring the accuracy of the test results of the wire harness.

[0020] (4) This solution uses an air pump to inject air into the airbag. The airbag gradually expands to cover the exposed wire. Sandpaper can be used to cover the exposed wire. By moving the airbag containing the sandpaper, the sandpaper can slide on the surface of the exposed wire. The sandpaper, with its rough surface, makes full contact with the wire and generates friction, thereby finely polishing the surface of the wire. This can remove some of the oxide film formed on the surface of the wire due to long-term exposure and the influence of the storage environment, avoiding problems such as increased contact resistance and abnormal signal transmission caused by excessive oxide layer on the surface of the wire. This ensures that the test results of the wire harness are accurate and reliable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the main body of the instrument of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the test points and test platform of the present invention;

[0024] Figure 4 This is a schematic diagram of the test platform portion of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a schematic diagram of the structure of the combing strip and the support plate of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the lower pressure block portion of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the connecting crossbar and the closing plate of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the connection between the horizontal plate and the mounting bracket of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the closing plate and the movable frame of the present invention;

[0031] Figure 11 This is a schematic diagram of the mounting bracket portion of the present invention.

[0032] Explanation of the labels in the diagram:

[0033] 1. Instrument body; 2. Test points;

[0034] 301. Test platform; 302. Guide rod; 303. Guide frame; 304. Rotating plate; 305. Cover frame; 306. Lead screw; 307. Motor; 308. Handle; 309. Horizontal plate; 310. Lower pressure block; 311. Moving block; 312. Pressure roller; 313. Support plate; 314. Combing strip; 315. Slide groove; 316. Side block; 317. Spring; 318. Side plate;

[0035] 401. Mounting bracket; 402. Lateral slide bar; 403. Moving plate; 404. Longitudinal slide bar; 405. Closing plate; 406. Moving frame; 407. Air guide hose; 408. Clamping block; 409. Bracket; 410. Sandpaper; 411. Connecting crossbar; 412. Air pump; 413. Airbag; 414. Telescopic section. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-7A wire harness continuity tester includes an instrument body 1 and test points 2, the test points 2 being electrically connected to the instrument body 1. A testing mechanism is disposed on the front surface of the instrument body 1. The testing mechanism includes multiple guide rods 302 inserted into the lower end of the front surface of the instrument body 1. A test platform 301 is fixedly connected to the front end of the multiple guide rods 302. The test points 2 are fixedly connected to the front end of the test platform 301. Two guide frames 303 are inserted into the rear end of the test platform 301. A rotating plate 304 is rotatably connected between the two guide frames 303. Cover frames 305 are fixedly connected to both ends of the front surface of the rotating plate 304. A horizontal plate 309 is fixedly connected to the front end of the two cover frames 305. A sliding component is inserted inside the horizontal plate 309. Multiple pressing blocks 310, when moving downwards, can push the wires downwards sequentially until they contact the test point 2. A motor 307 is fixedly connected to the upper left end of the horizontal plate 309. The motor 307, as a power source, can drive the lead screw 306 to rotate. The output shaft of the motor 307 is fixedly connected to the lead screw 306. When the lead screw 306 rotates, it can drive the moving block 311 to move along the slide groove 315. The surface of the lead screw 306 is threaded with the moving block 311. The front surface of the moving block 311 is rotatably connected to the pressure roller 312. When the pressure roller 312 presses down on the pressing blocks 310 sequentially, the pressing blocks 310 can move downwards sequentially. The upper surface of the horizontal plate 309 is provided with a slide groove 315. The moving block 311 is slidably connected to the inside of the slide groove 315.

[0038] The horizontal plate 309 has multiple side blocks 316 fixedly connected to its front surface, and the lower pressure block 310 has a side plate 318 fixedly connected to its front surface. A spring 317 is fixedly connected between the side plate 318 and the side blocks 316. The lower pressure block 310 that is not pressed by the pressure roller 312 is pushed upward by the spring 317, and the wire springs back upward, ensuring that only one wire is always in contact with the test point 2. A combing strip 314 is fixedly connected to the lower surface of the horizontal plate 309. The lower surface of the combing strip 314 has multiple grooves that cooperate with the wires. Moving the combing strip 314 forward can arrange the scattered wires. A support plate 313 is inserted inside the combing strip 314. The support plate 313 can support the wires and prevent the exposed part of the wire from being too long and causing the wire to droop naturally and contact the test point 2. A handle 308 is fixedly connected to the right end of the support plate 313.

[0039] By adopting the above technical solution, when testing the wire harness with the tester, the wire harness terminals are inserted into the interface of the instrument body 1. Then, the test platform 301 is moved so that the guide rod 302 is pulled out from the inside of the instrument body 1, and the moving length of the test platform 301 corresponds to the length of the wire harness. The exposed end of the wire on the wire harness is exactly above the test point 2. Then, the cover frame 305 is rotated and the guide frame 303 is extended or inserted from the test platform 301 so that the cover frame 305 is located at the root of the exposed wire of the wire harness. Since there are gaps between the roots of the exposed wires, the lower end of the combing bar 314 can be inserted between the roots of multiple exposed wires, so that the cable is located in the corresponding groove. Then, the combing bar 314 is moved forward to arrange the scattered wires.

[0040] Next, the combing bar 314 moves back to the root of the exposed wire. At this time, the motor 307 drives the lead screw 306 to rotate. The rotating lead screw 306 drives the moving block 311 to move along the slide groove 315. When the moving block 311 drives the pressure roller 312 to press down on the lower pressure block 310 in sequence, the lower pressure block 310 moves downward in sequence. At this time, the spring 317 is in a stretched state. When the lower pressure block 310 moves downward, it can push the wire to bend downward in sequence. The lower pressure block 310 that is not pressed by the pressure roller 312 is pushed upward by the spring 317, and the wire springs upward, so that the wire does not contact the test point 2. In this way, only one wire is always in contact with the test point 2. Multiple wires in the wire harness can be tested in sequence without the need for manual testing one by one. This reduces the manpower and time requirements in the testing process. Furthermore, combing the exposed cables in the wire harness can reduce the occurrence of errors and omissions in subsequent testing. When the wire is located in the groove on the comb bar 314, the support plate 313 is inserted into the comb bar 314. The support plate 313 can lift the wire and prevent the exposed part of the wire from being too long, causing the wire conductor to droop naturally and contact the test point 2, which would affect the test of the wire harness.

[0041] like Figures 8-11As shown, an end-cutting mechanism is disposed on the front surface of a horizontal plate 309. The end-cutting mechanism includes multiple mounting brackets 401 fixedly connected to the front surface of the horizontal plate 309. The mounting brackets 401 are arranged in pairs. A movable bracket 406 is provided at the lateral arm end of each mounting bracket 401. A strip-shaped through hole is formed on the surface of the movable bracket 406. A telescopic section 414 is fitted onto the lateral arm end of each mounting bracket 401. The telescopic section 414 is slidably inserted into the inside of the strip-shaped through hole. A clamping block 408 is fixedly connected to the bottom end of the movable bracket 406. The two clamping blocks 408 clamp the exposed wires on the wire and move them forward, straightening the exposed wire portion and preventing the wire from... The two mounting brackets 401 are bent and in contact with test point 2. The top ends of the two mounting brackets 401 are fixedly connected to the transverse slide rods 402. The surface of the transverse slide rods 402 is slidably fitted with a moving plate 403. The lower surface of the moving plate 403 is inserted with two longitudinal slide rods 404. The lower ends of the two longitudinal slide rods 404 are fixedly connected to a closing plate 405. The lower surface of the closing plate 405 is provided with a V-shaped groove, so that the V-shaped groove on the closing plate 405 is pressed against the inclined surface on the moving bracket 406, which can make the two moving brackets 406 move towards each other. The front surfaces of the multiple closing plates 405 are fixedly connected to a connecting crossbar 411, which can drive the multiple closing plates 405 to move simultaneously.

[0042] The clamping block 408 has a bracket 409 fixedly connected to both its upper and lower surfaces. An airbag 413 is fixedly connected to the surface of the bracket 409. When the airbag 413 expands, sandpaper 410 can wrap around the exposed wire. Sandpaper 410 is fixedly connected to the arc surface of the airbag 413. The surface of the wire can be polished by the sandpaper 410 to remove part of the oxide film. A ducted air hose 407 is fixedly inserted inside the movable frame 406. The ducted air hose 407 is connected to multiple airbags 413. An air pump 412 is fixedly connected to the right end of the upper surface of the horizontal plate 309. Air can enter the airbag 413 through the air pump 412. The air outlet of the air pump 412 is connected to the right end of the ducted air hose 407. The left end of the ducted air hose 407 is designed to be open for ventilation. When the air pump 412 stops supplying air, the air in the airbag 413 can be discharged without wrapping the wire.

[0043] By adopting the above technical solution, after combing the wires on the wire harness, hold the handle on the connecting crossbar 411 and press down on the connecting crossbar 411. This will simultaneously drive multiple closing plates 405 to move downwards, causing the V-groove on the closing plate 405 to press against the inclined surface on the moving frame 406. This will cause the two moving frames 406 to move closer to each other, thereby causing the two clamping blocks 408 to move closer to each other. This will allow the two clamping blocks 408 to clamp the exposed wires on the wires. Then, pull the moving frame 406 forward. Since the closing plate 405 and the moving frame 406 are in close contact, the friction between the closing plate 405 and the moving frame 406 will drive the moving frame 406 to move forward synchronously. Furthermore, since each clamping block 408 has only two contact points with the exposed wires on the wire, when the clamping block 408 moves on the surface of the exposed wires, it can straighten the exposed wires, thereby preventing the wires from bending and contacting the test point 2, which would affect the test results of the wire harness.

[0044] After the exposed wire portion is straightened and clamped by two clamping blocks 408, air is introduced into the air hose 407 through the air pump 412, which inflates the airbag 413 to cover the exposed wire portion. This allows the sandpaper 410 to wrap around the exposed wire. As the clamping blocks 408 move, the sandpaper 410 moves across the surface of the exposed wire, polishing the surface of the wire to remove some of the oxide film. This prevents the wire from being exposed for a long time and developing a large oxide layer due to the storage environment, which would affect the test results of the wire harness.

[0045] How to use:

[0046] First, plug the wiring harness terminals into the interface of the instrument body 1;

[0047] Next, the test platform 301 is moved so that the guide rod 302 is pulled out from inside the instrument body 1;

[0048] Next, the cover 305 is rotated and the guide 303 is extended or inserted from the test platform 301 to position the cover 305 at the root of the exposed wires of the wire harness.

[0049] At the same time, the lower end of the combing strip 314 is inserted between the roots of multiple exposed wires, so that the cable is located in the corresponding groove;

[0050] Next, move the comb bar 314 forward to arrange the loose wires;

[0051] Next, move strip 314 back to the exposed root of the wire;

[0052] Then, grasp the handle on the connecting crossbar 411 and press down on the connecting crossbar 411 so that the two clamps 408 can clamp the exposed wires on the wire.

[0053] At the same time, air is introduced into the airbag 413 by the air pump 412.

[0054] Next, pull the movable frame 406 forward to straighten the exposed wires and clean the oxide layer;

[0055] Finally, the motor 307 and the lead screw 306 drive the moving block 311 and the pressure roller 312 to press down on the lower pressure block 310 in sequence, so that the lower pressure block 310 can push the wire downwards in sequence until it contacts the test point 2 for testing.

[0056] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A wire harness continuity tester, comprising an instrument body (1) and test points (2), wherein the test points (2) are electrically connected to the instrument body (1), characterized in that: The testing mechanism is located on the front surface of the instrument body (1). The testing mechanism includes multiple guide rods (302) inserted into the lower end of the front surface of the instrument body (1). A testing platform (301) is fixedly connected to the front end of each guide rod (302). The test point (2) is fixedly connected to the front end of the testing platform (301). Two guide frames (303) are inserted into the rear end of the testing platform (301). A rotating plate (304) is rotatably connected between the two guide frames (303). Both ends of the front surface are fixedly connected to a cover frame (305), and the front ends of the two cover frames (305) are fixedly connected to a horizontal plate (309). Multiple pressing blocks (310) are slidably inserted inside the horizontal plate (309). A motor (307) is fixedly connected to the upper surface of the left end of the horizontal plate (309). A lead screw (306) is fixedly connected to the output shaft of the motor (307). A moving block (311) is threaded on the surface of the lead screw (306). A pressure roller (312) is rotatably connected to the front surface of the moving block (311).

2. The wire harness continuity tester according to claim 1, characterized in that: The upper surface of the horizontal plate (309) is provided with a sliding groove (315), and the moving block (311) is slidably connected to the inside of the sliding groove (315).

3. The wire harness continuity tester according to claim 1, characterized in that: The front surface of the horizontal plate (309) is fixedly connected to a plurality of side blocks (316), the front surface of the pressing block (310) is fixedly connected to a side plate (318), and a spring (317) is fixedly connected between the side plate (318) and the side blocks (316).

4. The wire harness continuity tester according to claim 1, characterized in that: A combing strip (314) is fixedly connected to the lower surface of the horizontal plate (309). The lower surface of the combing strip (314) has multiple grooves that cooperate with the wires. A support plate (313) is inserted inside the combing strip (314). A handle (308) is fixedly connected to the right end of the support plate (313).

5. A wire harness continuity tester according to claim 1, characterized in that: An end-processing mechanism is provided on the front surface of the horizontal plate (309). The end-processing mechanism includes multiple mounting brackets (401) fixedly connected to the front surface of the horizontal plate (309). The multiple mounting brackets (401) are arranged in pairs. A movable bracket (406) is provided at the transverse arm end of the mounting bracket (401). A strip-shaped through hole is opened through the surface of the movable bracket (406). A telescopic section (414) is sleeved at the transverse arm end of the mounting bracket (401). The telescopic section (414) is slidably inserted into the interior of the strip-shaped through hole. A clamping block (408) is fixedly connected to the bottom end of the movable bracket (406).

6. A wire harness continuity tester according to claim 5, characterized in that: The top ends of the two mounting brackets (401) are fixedly connected to a transverse slide rod (402). A movable plate (403) is slidably sleeved on the surface of the transverse slide rod (402). Two longitudinal slide rods (404) are inserted into the lower surface of the movable plate (403). The lower ends of the two longitudinal slide rods (404) are fixedly connected to a closing plate (405). A V-shaped groove is opened on the lower surface of the closing plate (405). A connecting crossbar (411) is fixedly connected to the front surface of the multiple closing plates (405).

7. A wire harness continuity tester according to claim 5, characterized in that: The upper and lower surfaces of the clamping block (408) are both fixedly connected to a bracket (409), and an airbag (413) is fixedly connected to the surface of the bracket (409). Sandpaper (410) is fixedly connected to the arc surface of the airbag (413).

8. A wire harness continuity tester according to claim 7, characterized in that: An air guide hose (407) is fixedly inserted inside the movable frame (406), and the air guide hose (407) is connected to a plurality of airbags (413).

9. A wire harness continuity tester according to claim 8, characterized in that: An air pump (412) is fixedly connected to the right end of the upper surface of the horizontal plate (309), and the air outlet of the air pump (412) is connected to the right end of the air guide hose (407).

10. A wire harness continuity tester according to claim 9, characterized in that: The left end of the air guide hose (407) is designed for open ventilation.

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