PCB (printed circuit board) test board for locomotive electronic product

Abstract

The invention discloses a PCB (printed circuit board) test board for locomotive electronic products, which belongs to the field of PCB testing and comprises a protective shell, a test board component for moving a PCB is mounted in the middle of the inside of the protective shell, and a needle bed component for detecting the PCB is mounted in the protective shell. The side, adjacent to the needle bed component, of the interior of the protection shell is provided with a material returning component used for moving out the PCB needing to be detected again, and the side, opposite to the needle bed component, of the interior of the protection shell is provided with a first rotating wheel used for discharging the qualified PCB. A second rotating wheel for unloading unqualified PCBs is installed on the side, opposite to the material returning component, of the interior of the protection shell, the PCBs with different detection results can be classified through the arrangement of the test board component, the situation that multiple PCBs are stacked together, and consequently manual classification is needed in the later period is avoided, and the detection efficiency is improved. The influence of unqualified products on qualified products can be prevented, the automation of the device is further improved, and the qualified products can be protected.

Description

Technical Field

[0001] This invention relates to the field of PCB board testing, and more specifically, to a PCB board testing bench for locomotive electronic products. Background Technology

[0002] PCB board inspection refers to the process of checking the electrical performance, physical structure, soldering quality, and functional integrity of printed circuit boards (PCBs) through a series of testing methods and techniques to ensure that they meet design specifications and quality standards. It is a critical step in the electronics manufacturing process, directly impacting product reliability, performance, and yield.

[0003] The patent with announcement number CN118707163B provides a flying probe tester for PCB circuit boards, including a flying probe test table, a support frame, a robotic arm, and test probes. The lower part of the flying probe test table is equipped with support frames on both sides, and robotic arms are installed on both sides of the support frames. Test probes are installed on the robotic arms. The tester also includes a test bracket, a storage component, and a positioning component. The test bracket is connected to the middle of the bottom of the flying probe test table. The device adds circuit boards by controlling the push block with an electric guide rail. After the boards are added, they can be positioned by the positioning block. When additional boards need to be added, the push block only needs to be moved repeatedly once by controlling the electric guide rail. This makes the operation more convenient and allows the device to automatically load and unload materials.

[0004] However, the above solution has the following shortcomings: after the test is completed, all qualified and unqualified products are stacked together, which requires manual sorting later. This still requires manual operation, resulting in low overall testing efficiency and low ability to resist unstable factors.

[0005] In view of this, and to address the aforementioned shortcomings, this invention develops a PCB board testing platform for locomotive electronic products. Summary of the Invention

[0006] To address the problems existing in the prior art, the purpose of this invention is to provide a PCB board testing platform for locomotive electronic products, which can automatically classify and store qualified products, unqualified products, and falsely tested products, and automatically perform secondary testing on falsely tested products.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A PCB board testing platform for locomotive electronic products includes a protective housing. A testing platform component for moving PCB boards is installed in the middle of the interior of the protective housing. A bed of needles component for testing the PCB boards is also installed inside the protective housing. A return component for removing PCB boards that need to be retested is installed on the side of the interior of the protective housing adjacent to the bed of needles component. A first roller for unloading qualified PCB boards is installed on the side of the interior of the protective housing opposite to the bed of needles component. A second roller for unloading unqualified PCB boards is installed on the side of the interior of the protective housing opposite to the return component. A feeding component for returning materials is provided on one side of the return component. The test bench component includes a support, a support shaft rotatably mounted in the middle of the support, a rotating plate fixedly mounted on the upper end of the support shaft, U-shaped clamps at each of the four quadrant points of the rotating plate, a plurality of first spring telescopic rods fixedly connected between the U-shaped clamps and the rotating plate, an annular frame for changing the position of the U-shaped clamps is provided below the rotating plate, the annular frame is fixedly mounted inside the protective shell, a sleeve is rotatably sleeved on the support shaft, and a first incomplete gear, a second incomplete gear and a third incomplete gear are fixedly mounted on the outside of the sleeve from top to bottom.

[0009] Furthermore, multiple evenly distributed first ratchet teeth are fixedly installed at the positions corresponding to the support shaft and the sleeve. The sleeve is fixedly installed with mating ratchet teeth that cooperate with the first ratchet teeth. A torsion spring for resetting is fixedly connected between the sleeve and the support. Multiple sliders are slidably engaged inside the lower end of the support shaft. A pressure spring is fixedly connected between the sliders and the support shaft. Multiple slots for cooperating with the sliders are opened inside the support.

[0010] Furthermore, a sliding bracket is provided above the annular frame, and a first V-shaped frame is slidably installed on the annular frame at the position corresponding to the return material component. A first arc-shaped frame is fixedly installed above the first V-shaped frame, and a second arc-shaped frame is fixedly installed below the first V-shaped frame. A second V-shaped frame is slidably installed on the annular frame at the position corresponding to the first rotating wheel, and a third arc-shaped frame is fixedly installed below the second V-shaped frame. A fourth arc-shaped frame is fixedly installed below the third arc-shaped frame. A third V-shaped frame is provided on the annular frame at the position corresponding to the needle bed component. Both the first V-shaped frame and the second V-shaped frame are fixedly installed on the sliding bracket. The annular frame is fixedly installed inside the protective shell through the first bracket, and the sliding bracket is slidably connected to the first bracket through a sliding rod.

[0011] Furthermore, a Z-shaped plate is fixedly installed below the U-shaped clamp, a sliding rod is fixedly installed below the Z-shaped plate, a drive motor is fixedly installed on the outside of the support, and a transmission gear is slidably installed on the drive end of the drive motor. The number of teeth of the first incomplete gear is half the number of teeth of the transmission gear, the number of teeth of the second incomplete gear is one-quarter the number of teeth of the transmission gear, and the number of teeth of the third incomplete gear is half the number of teeth of the transmission gear.

[0012] Furthermore, the support has two first electric lifting rods diagonally distributed on its exterior, and two second electric lifting rods diagonally distributed on its exterior. The two first electric lifting rods and the two second electric lifting rods are evenly distributed on the exterior of the support. The support shaft has a lifting frame on its exterior, which is rotatably mounted on a transmission gear. The telescopic ends of the first and second electric lifting rods are fixedly mounted on the lifting frame. A connecting spring is fixedly mounted on the lifting frame, and the end of the connecting spring away from the lifting frame is fixedly mounted on a sliding bracket.

[0013] Furthermore, the material return component includes a U-shaped frame, on which multiple evenly distributed unloading baffles are fixedly installed. Dyed cotton for marking the PCB is fixedly installed on the U-shaped frame. Two rotating arms are rotatably installed on one side of the U-shaped frame, and synchronous gears are fixedly installed at the ends of the two rotating arms. The two synchronous gears are driven by a chain. A second bracket is fixedly installed on the outside of the protective shell, and the two synchronous gears are rotatably installed on the second bracket. A first motor for driving the synchronous gears to rotate is fixedly installed on the second bracket.

[0014] Furthermore, the feeding component includes a transmission bracket, a first conveyor belt is installed inside the transmission bracket, a storage frame is provided above the transmission bracket, the storage frame is fixedly installed outside the protective shell, a plurality of evenly distributed first protrusions are fixedly installed on the first conveyor belt, side plates are fixedly installed on both sides of the upper end of the transmission bracket, a fixed frame is provided below the transmission bracket, a servo motor is fixedly installed above the fixed frame, a rotating frame is rotatably installed at the top of the fixed frame, and the rotating frame is fixedly installed at the bottom end of the transmission bracket.

[0015] Furthermore, a material-picking bracket is fixedly installed on the outside of the protective shell at a position corresponding to the material return component. Multiple evenly distributed support rods are fixedly installed on the upper end of the material-picking bracket, and the height of the multiple support rods gradually decreases. A second conveyor belt is provided on the side of the transmission bracket near the protective shell. Multiple evenly distributed second protrusions are fixedly installed on the second conveyor belt. The second conveyor belt extends to one side of the needle bed component and is fixedly installed on the protective shell.

[0016] Furthermore, the needle bed component includes a support frame, with multiple evenly distributed hydraulic cylinders fixedly installed above the support frame, a movable frame below the support frame, a rotating plate rotatably installed in the middle of the movable frame, a first needle bed detachably installed above the rotating plate, a second needle bed detachably installed below the support frame, a ratchet rotatably installed on one side of the movable frame, the ratchet being fixedly connected to the rotating plate via a rotating shaft, a ratchet plate cooperating with the ratchet being fixedly installed inside the protective housing, and a support platform below the movable frame, the support platform being fixedly installed inside the protective housing.

[0017] Furthermore, both the first and second rotating wheels are fixedly connected to the inside of the protective housing via a second spring telescopic rod. The first rotating wheel is located above the U-shaped clamp, and the second rotating wheel is located below the U-shaped clamp. A first storage box is fixedly installed inside the protective housing at a position corresponding to the first rotating wheel, and a second storage box is fixedly installed outside the protective housing at a position corresponding to the second rotating wheel. The protective housing has a slot for ejecting the PCB board, and a second motor is installed on both the first and second rotating wheels to provide their rotation.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This solution, by setting up a test bench component, can classify PCBs with different test results, avoiding the need for manual classification later due to multiple PCBs being stacked together. It can also prevent defective products from affecting qualified products, further improving the automation of the device and protecting qualified products.

[0019] 2. This solution uses a ring frame to transport incompletely qualified products to the feeding component for re-inspection when the first and second electric lifting rods change position. This prevents inaccurate test results due to unstable external factors and reduces the false test rate.

[0020] 3. This solution sets up a return component, a first rotating wheel, and a second rotating wheel. When multiple incompletely qualified products are repeatedly circulated inside the return component, it indicates that some components in the 3 support shafts and 3 rotating plates are damaged, resulting in multiple PCB boards being falsely tested. If there are a large number of marked PCB boards mixed in with qualified or unqualified products, it indicates that the external unstable factors are too high, leading to an increased false test rate. The device needs to be repaired so that it can indirectly show whether each component is working properly, further reducing the false test rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first-view perspective; Figure 2This is a schematic diagram of the overall structure of the invention from a second perspective; Figure 3 This is a schematic diagram of the overall structure of the invention from a third-person perspective; Figure 4 This is a schematic diagram of the test bench component in this invention; Figure 5 This is a schematic diagram of the U-shaped clamp in this invention; Figure 6 This is a schematic diagram of the sleeve structure in this invention; Figure 7 This is a schematic diagram of the ring frame structure in this invention; Figure 8 This is a cross-sectional view of the support shaft in this invention; Figure 9 This is a schematic diagram of the support structure in this invention; Figure 10 This is a schematic diagram of the material recycling component in this invention; Figure 11 This is a schematic diagram of the feeding component in this invention; Figure 12 This is a schematic diagram of the needle bed component in this invention.

[0022] Explanation of the labels in the diagram: 1. Protective outer shell; 2. Test bench component; 3. Needle bed component; 4. Return component; 5. Material pick-up bracket; 6. Feeding component; 7. First rotating wheel; 8. Second rotating wheel; 21. Support; 22. Support shaft; 23. Rotating plate; 24. Ring frame; 25. Drive motor; 26. First electric lifting rod; 31. Support frame; 32. Hydraulic cylinder; 33. Moving frame; 34. Ratchet; 35. Ratchet plate; 36. Support platform; 41. U-shaped frame; 42. Rotating arm; 51. Support rod; 61. Transmission bracket; 62. First conveyor belt; 63. Fixed frame; 64. Storage frame; 65. Second conveyor belt; 71. First storage box; 81. Second storage box; 221. Sleeve; 222. First incomplete gear; 223. Second incomplete gear; 224. Third incomplete gear; 225. Torsion spring; 226. First ratchet; 227. Slider; 228. Compression spring; 231. U-shaped clamp; 232. First spring telescopic rod; 233. Z-shaped plate; 234. Sliding rod; 241. Sliding bracket; 242. First V-shaped frame; 243. First arc-shaped frame; 244. Second arc-shaped frame; 245. Second V-shaped frame; 246. Third arc-shaped frame; 247. Fourth arc-shaped frame; 248. Third V-shaped frame; 251. Transmission gear; 261. Second electric lifting rod; 262. Lifting frame; 263. Connecting spring; 331. Rotating plate; 332. First needle bed; 333. Second needle bed; 411. Unloading stop bar; 412. Dyed cotton; 421. Synchronizing gear; 611. Side plate; 621. First convex plate; 631. Servo motor; 632. Rotating frame; 651. Second convex plate. Detailed Implementation

[0023] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 12A PCB board testing platform for locomotive electronic products includes a protective housing 1. A testing platform component 2 for moving PCB boards is installed in the middle of the interior of the protective housing 1. A needle bed component 3 for testing PCB boards is installed inside the protective housing 1. A return component 4 for removing PCB boards that need to be retested is installed on the side of the interior of the protective housing 1 adjacent to the needle bed component 3. A material picking bracket 5 is fixedly installed on the exterior of the protective housing 1 at a position corresponding to the return component 4. Multiple evenly distributed support rods 51 are fixedly installed at the upper end of the material picking bracket 5, with the height of the support rods 51 gradually decreasing. A first rotating wheel 7 for unloading qualified PCB boards is installed on the side of the interior of the protective housing 1 opposite to the needle bed component 3. A second rotating wheel 8 for unloading unqualified PCB boards is installed on the side of the interior of the protective housing 1 opposite to the return component 4. A feeding component 6 for returning materials is provided on one side of the return component 4.

[0025] In actual use, the feeding component 6 transports the untested PCB board to the needle bed component 3. At this time, the needle bed component 3 performs multiple tests on the PCB board. After the test is completed, there will be qualified, unqualified, and partially qualified products. The reason for the incomplete qualified products is due to environmental temperature and humidity, or probe deviation, probe oxidation, etc. This may lead to inaccurate detection in multiple tests, and there may be a situation where one is qualified and one is unqualified. When an incomplete qualified product is found, the return component 4 can move the incomplete qualified product from the test table component 2 to the pick-up bracket 5. The pick-up bracket 5 can transport it back to the feeding component 6 for re-inspection, which increases the detection frequency and reduces the detection error caused by unstable elements. In addition, the return component 4 can mark the partially qualified products during transportation. Qualified products are unloaded by the first rotary wheel 7, while unqualified products are unloaded by the second rotary wheel 8. This realizes the method of classifying and unloading PCB boards with different test results, and prevents qualified and unqualified products from piling up together.

[0026] Furthermore, when a marked incompletely qualified product passes the second inspection, it will be either unloaded as a qualified product by the first rotary wheel 7 or rejected as a defective product by the second rotary wheel 8. After all PCB boards in the same batch have been inspected, if there are too many incompletely qualified products mixed in with the qualified and unqualified products, it indicates that the needle bed component 3 is malfunctioning, resulting in inaccurate detection, and the machine needs to be calibrated. If there are a lot of incompletely qualified products piled up in the return component 4, it indicates that there is a problem in one of the inspection links during multiple inspections, which will result in all PCB boards being half-qualified products. This device can not only classify qualified and unqualified products, but also detect the accuracy of the device and whether it is damaged from the side, preventing false detections.

[0027] The test bench component 2 includes a support 21. A drive motor 25 is fixedly mounted on the outside of the support 21. A transmission gear 251 is slidably mounted on the drive end of the drive motor 25. A support shaft 22 is rotatably mounted in the middle of the support 21. A rotating plate 23 is fixedly mounted on the upper end of the support shaft 22. U-shaped clamps 231 are provided at each of the four quadrant points of the rotating plate 23. Multiple first spring telescopic rods 232 are fixedly connected between the U-shaped clamps 231 and the rotating plate 23. A ring frame 24 for changing the position of the U-shaped clamps 231 is provided below the rotating plate 23. The ring frame 24 is fixedly mounted inside the protective shell 1. A sleeve 221 is rotatably sleeved on the support shaft 22. A first incomplete gear 222, a second incomplete gear 223, and a third incomplete gear are fixedly mounted on the outside of the sleeve 221 from top to bottom. 224, the number of teeth of the first incomplete gear 222 is half the number of teeth of the transmission gear 251, the number of teeth of the second incomplete gear 223 is one-quarter the number of teeth of the transmission gear 251, and the number of teeth of the third incomplete gear 224 is half the number of teeth of the transmission gear 251. Multiple evenly distributed first ratchet teeth 226 are fixedly installed at the corresponding positions of the support shaft 22 and the sleeve 221. The sleeve 221 is fixedly installed with mating ratchet teeth that cooperate with the first ratchet teeth 226. A torsion spring 225 for resetting is fixedly connected between the sleeve 221 and the support 21. Multiple sliders 227 are slidably engaged inside the lower end of the support shaft 22. A pressure spring 228 is fixedly connected between the sliders 227 and the support shaft 22. Multiple slots for cooperating with the sliders 227 are opened inside the support 21.

[0028] During testing, the feeding component 6 conveys the PCB board to be tested into the U-shaped clamp 231 corresponding to the needle bed component 3. The needle bed component 3 then performs testing on the PCB board. After testing, the device adjusts the position of the transmission gear 251 based on the PCB board's test results. When the PCB board is qualified, the transmission gear 251 rises two units to engage with the first incomplete gear 222. When the PCB board is partially qualified, the transmission gear 251 remains stationary and engages with the second incomplete gear 223. When the PCB board is unqualified, the transmission gear 251 descends two units to engage with the second incomplete gear 223. The initial tooth positions of the first incomplete gear 222, the second incomplete gear 223, and the third incomplete gear 224 are all located on the same vertical line, ensuring that the transmission gear 251 can accurately engage the corresponding teeth during vertical movement. After testing, the drive... The motor 25 drives the transmission gear 251 to rotate. Since the number of teeth of the first incomplete gear 222 is three-quarters of the number of teeth of the transmission gear 251, the number of teeth of the second incomplete gear 223 is one-quarter of the number of teeth of the transmission gear 251, and the number of teeth of the third incomplete gear 224 is half the number of teeth of the transmission gear 251, when the transmission gear 251 meshes with the first incomplete gear 222, the drive motor 25 will drive the first incomplete gear 222, the sleeve 221, and the support shaft 22 to rotate 270°. When the transmission gear 251 meshes with the second incomplete gear 223, the transmission gear 251 will drive the second incomplete gear 223, the sleeve 221, and the support shaft 22 to rotate 90°. When the transmission gear 251 meshes with the third incomplete gear 224, it will drive the support shaft 22 to rotate 180°. This allows PCBs with different test results to be rotated to different positions respectively, ensuring accurate classification and improving production efficiency.

[0029] After the test is completed, the transmission gear 251 returns to its initial position and engages with the second incomplete gear 223. Because the internal ratchet of the sleeve 221 precisely engages with the first ratchet 226, the sleeve 221 rotates forward, driving the support shaft 22 to rotate. At this time, the torsion spring 225 is twisted. After the test is completed, the drive motor 25 stops working, and the torsion spring 225 drives the sleeve 221 to reverse and reset. Due to the action of the ratchet and the first ratchet 226, the sleeve 221 cannot drive the support shaft 22 in reverse. Under the push of the pressure spring 228, the slider 227 can ensure the stable position of the support shaft 22, so that the U-shaped clamp 231 can be accurately aligned with each component. On the other hand, it can increase the resistance to the rotation of the support shaft 22, ensuring that the support shaft 22 will not be displaced by the reverse force of the sleeve 221 during the reset process. This ensures that after each test, each component of the device can be accurately reset, providing a stable and reliable initial state for the next test, and further improving the accuracy and efficiency of the overall test process.

[0030] A sliding bracket 241 is provided above the annular frame 24. A first V-shaped frame 242 is slidably installed on the annular frame 24 at the position corresponding to the return material component 4. A first arc-shaped frame 243 is fixedly installed above the first V-shaped frame 242. A second arc-shaped frame 244 is fixedly installed below the first V-shaped frame 242. A second V-shaped frame 245 is slidably installed on the annular frame 24 at the position corresponding to the first rotating wheel 7. A third arc-shaped frame 246 is fixedly installed below the second V-shaped frame 245. A fourth arc-shaped frame 247 is fixedly installed below the third arc-shaped frame 246. A third V-shaped frame 248 is provided on the annular frame 24 at the position corresponding to the needle bed component 3. The first V-shaped frame 242 and the second V-shaped frame 245 are both fixedly installed on the sliding bracket 241. The annular frame 24 is fixedly installed inside the protective shell 1 by the first bracket. The sliding bracket 241 is connected by a sliding rod. A Z-shaped plate 233 is fixedly installed below the U-shaped clamp 231, which is slidably connected to the first bracket. A sliding rod 234 is fixedly installed below the Z-shaped plate 233. Two first electric lifting rods 26 and two second electric lifting rods 261 are diagonally distributed on the outside of the support 21. The two first electric lifting rods 26 and two second electric lifting rods 261 are evenly distributed on the outside of the support 21. A lifting frame 262 is provided on the outside of the support shaft 22. The lifting frame 262 is rotatably mounted on the transmission gear 251. The telescopic ends of the first electric lifting rods 26 and the second electric lifting rods 261 are fixedly mounted on the lifting frame 262. A connecting spring 263 is fixedly installed on the lifting frame 262. The end of the connecting spring 263 away from the lifting frame 262 is fixedly mounted on the sliding bracket 241.

[0031] During testing, if the first test is successful, the first electric lifting rod 26 will descend one unit; if it fails, it will rise one unit. During the first test, the second electric lifting rod 261 is not working and will rise one unit driven by the second electric lifting rod 261 and the lifting frame 262. During the second test, the second electric lifting rod 261 starts working. If successful, the second electric lifting rod 261 drives the lifting frame 262 to descend one unit; if it fails, the second electric lifting rod 261 drives the lifting frame 262 to rise one unit again. If both results are successful, the lifting frame 262 and the transmission gear 251 are driven to descend two units. The transmission gear 251 meshes with the third incomplete gear 224, thereby driving the motor 25 to rotate the third incomplete gear 224, the sleeve 221, and the support shaft 22 180°, conveying the successful product to the position of the first rotating wheel 7 for removal. If the first test fails, the first electric lifting rod 26 rises one unit. The second electric lifting rod 261 remains stationary, awaiting the second inspection. If the second inspection still fails, the second electric lifting rod 261 rises one unit again, causing the lifting frame 262 to rise two units. At this time, the transmission gear 251 meshes with the first incomplete gear 222. The transmission gear 251 drives the first incomplete gear 222, sleeve 221, and support shaft 22 to rotate 180°, conveying the defective product to the position of the second rotating wheel 8 for removal. When the first inspection is qualified and the second inspection is unqualified, or when the first inspection is unqualified and the second inspection is qualified, the first electric lifting rod 26 and the second electric lifting rod 261 will return to the initial position in the middle due to one rise and one fall. At this time, the transmission gear 251 meshes with the second incomplete gear 223, and the drive motor 25 drives the second incomplete gear 223, sleeve 221, and support shaft 22 to rotate 90°, sending the product to be re-inspected to the position of the feeding component 6 for re-inspection, ensuring that each step is accurate and error-free.

[0032] In the initial position, one of the sliding rods 234 is located inside the first V-shaped frame 242, and the first arc-shaped frame 243 and the second arc-shaped frame 244 are located on its upper and lower sides, respectively. When the lifting frame 262 rises, it compresses the connecting spring 263, which applies a reverse force to the sliding bracket 241, causing the sliding bracket 241 to generate an upward thrust. At this time, the second arc-shaped frame 244 is blocked by the sliding rod 234, preventing it from moving. At this time, the drive motor 25 drives the support shaft 22 and multiple U-shaped clamps 231 and Z-shaped clamps. When the plate 233 and sliding rod 234 rotate, the sliding rod 234 will gradually move into the interior of the ring frame 24 due to the action of the first V-shaped frame 242. When all the sliding rods 234 have entered the interior of the ring frame 24, the second arc frame 244 loses contact with the sliding rod 234. Under the action of the connecting spring 263, the sliding bracket 241 drives the second arc frame 244 to rise. At this time, the fourth arc frame 247 will also rise to replace the position of the third arc frame 246, thereby enabling the defective products to be transported to the position of the second rotating wheel 8.

[0033] When the inspection is qualified, the sliding bracket 241 will drive the first arc frame 243 to descend and replace the position of the first V-shaped frame 242, and the second V-shaped frame 245 to descend and replace the position of the third arc frame 246, so that the qualified product can be smoothly transported to the position of the first rotating wheel 7. When there is an incomplete qualified product, the device is in the initial position and the sliding rod 234 will enter the interior of the first V-shaped frame 242, so that the incomplete qualified product can be transported to the position of the return material component 4 for re-inspection, ensuring that each link is accurate and error-free.

[0034] The return material component 4 includes a U-shaped frame 41, on which multiple evenly distributed unloading baffles 411 are fixedly installed. Dyed cotton 412 for marking PCBs is fixedly installed on the U-shaped frame 41. Two rotating arms 42 are rotatably installed on one side of the U-shaped frame 41. Synchronous gears 421 are fixedly installed at the ends of the two rotating arms 42. The two synchronous gears 421 are driven by a chain. A second bracket is fixedly installed on the outside of the protective shell 1. The two synchronous gears 421 are rotatably installed on the second bracket. A first motor for driving the synchronous gears 421 to rotate is fixedly installed on the second bracket.

[0035] When the incompletely qualified product is conveyed to the return component 4, the first motor drives the two rotating arms 42 to rotate synchronously. The two synchronous gears 421 drive the U-shaped frame 41 to be conveyed horizontally through chain transmission, thereby smoothly lifting the incompletely qualified product on the U-shaped clamp 231 onto the unloading stop bar 411. The dyed cotton 412 can accurately mark the incompletely qualified product to ensure that there is a basis for subsequent re-inspection. When the unloading stop bar 411 is driven to rotate 90°, the unloading stop bar 411 will pass through the support rod 51. At this time, the incompletely qualified product slides down to the feeding component 6 under the action of gravity. The feeding component 6 sends it to the re-inspection area for re-inspection.

[0036] The feeding component 6 includes a transmission bracket 61, inside which a first conveyor belt 62 is installed. A storage frame 64 is provided above the transmission bracket 61 and is fixedly installed on the outside of the protective shell 1. Multiple evenly distributed first protrusions 621 are fixedly installed on the first conveyor belt 62. Side plates 611 are fixedly installed on both sides of the upper end of the transmission bracket 61. A fixing frame 63 is provided below the transmission bracket 61. A servo motor 631 is fixedly installed above the fixing frame 63. A rotating frame 632 is rotatably installed on the top of the fixing frame 63 and is fixedly installed on the bottom end of the transmission bracket 61. A second conveyor belt 65 is provided on the side of the transmission bracket 61 near the protective shell 1. Multiple evenly distributed second protrusions 651 are fixedly installed on the second conveyor belt 65. The second conveyor belt 65 extends to one side of the needle bed component 3 and is fixedly installed on the protective shell 1.

[0037] Defective products slide down the support rod 51 into the storage box 64 and stack with the PCBs to be inspected. Initially, the first conveyor belt 62 is parallel to the storage box 64. At this time, the PCBs inside the storage box 64 fall between the two side plates 611 due to gravity. When feeding is required, the servo motor 631 rotates, driving the transmission bracket 61 and the first conveyor belt 62 to rotate. The first conveyor belt 62 then rotates to a position perpendicular to the storage box 64. Under the continuous conveying of the first conveyor belt 62 and the first protruding plate 621, the PCBs are collected... The bottom PCB board inside the frame 64 is conveyed to the second conveyor belt 65. The second conveyor belt 65 continuously conveys the PCB board to the position of the needle bed component 3 for inspection. After the feeding is completed, the servo motor 631 drives the transmission bracket 61 and the first conveyor belt 62 to return to the initial parallel state, ensuring that the next PCB board falls smoothly between the two side plates 611. The precise control of the servo motor 631 ensures the orderly conveying of the PCB board, while avoiding the accumulation and misalignment of the PCB board, improving the inspection efficiency, and the whole process is highly automated.

[0038] The needle bed component 3 includes a support frame 31. Multiple evenly distributed hydraulic cylinders 32 are fixedly installed on the upper part of the support frame 31. A movable frame 33 is provided below the support frame 31. A rotating plate 331 is rotatably installed in the middle of the movable frame 33. A first needle bed 332 is detachably installed above the rotating plate 331. A second needle bed 333 is detachably installed below the support frame 31. A ratchet 34 is rotatably installed on one side of the movable frame 33. The ratchet 34 is fixedly connected to the rotating plate 331 through a rotating shaft. A ratchet plate 35 that cooperates with the ratchet 34 is fixedly installed inside the protective shell 1. A support platform 36 is provided below the movable frame 33. The support platform 36 is fixedly installed inside the protective shell 1.

[0039] When the hydraulic cylinder 32 drives the moving frame 33, rotating plate 331, first needle bed 332, and second needle bed 333 to descend synchronously, the ratchet 34 cannot be driven to rotate by the ratchet plate 35. As a result, the second needle bed 333 will be continuously pressed down and make close contact with the PCB board to be tested for the first test. When the hydraulic cylinder 32 drives the moving frame 33, rotating plate 331, first needle bed 332, and second needle bed 333 to rise synchronously, the ratchet plate 35 contacts the ratchet 34 and drives it to rotate, so that the first needle bed 332 is rotated to the position of the second needle bed 333. Then, the first needle bed 332 will be used to perform a second test on the PCB board for the second time. The rotating plate 331 is provided with protrusions, and the moving frame 33 is provided with slots, so that the first needle bed 332 and the second needle bed 333 can remain horizontal after each position change. The support platform 36 is used to support the pressure brought by the hydraulic cylinder 32 to ensure the stability of the testing process.

[0040] The first rotating wheel 7 and the second rotating wheel 8 are both fixedly connected to the inside of the protective shell 1 by the second spring telescopic rod. The first rotating wheel 7 is located above the U-shaped clamp 231, and the second rotating wheel 8 is located below the U-shaped clamp 231. The first storage box 71 is fixedly installed inside the protective shell 1 at the position corresponding to the first rotating wheel 7, and the second storage box 81 is fixedly installed outside the protective shell 1 at the position corresponding to the second rotating wheel 8. The protective shell 1 has a slot for ejecting the PCB board. The first rotating wheel 7 and the second rotating wheel 8 are both equipped with a second motor for providing their rotation.

[0041] When the PCB board is conveyed to the area below the first rotating wheel 7, the first rotating wheel 7 descends via the second spring telescopic rod, precisely pressing against the PCB board. The second motor continues to rotate, conveying qualified PCB boards into the interior of the first storage box 71 for storage. When the PCB board is conveyed to the area above the second rotating wheel 8, the second rotating wheel 8 rises via the second spring telescopic rod, adhering to the lower surface of the PCB board. Driven by the second motor, the second rotating wheel 8 continues to rotate, conveying defective products into the interior of the second storage box 81 for storage.

[0042] 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 PCB board test bench for locomotive electronic products, comprising a protective shell (1), characterized in that: The protective housing (1) has a test bench component (2) for moving PCB boards installed in the middle of its interior. The protective housing (1) also has a needle bed component (3) for testing PCB boards installed inside its interior. The protective housing (1) has a return component (4) for removing PCB boards that need to be retested installed on the side adjacent to the needle bed component (3) inside its interior. The protective housing (1) has a first roller (7) for unloading qualified PCB boards installed on the side opposite to the needle bed component (3) inside its interior. The protective housing (1) has a second roller (8) for unloading unqualified PCB boards installed on the side opposite to the return component (4) inside its interior. The return component (4) has a feeding component (6) for returning materials on one side. The test bench component (2) includes a support (21), a support shaft (22) is rotatably mounted in the middle of the support (21), a rotating plate (23) is fixedly mounted on the upper end of the support shaft (22), and a U-shaped clamp (231) is provided at each of the four quadrant points of the rotating plate (23). A plurality of first spring telescopic rods (232) are fixedly connected between the U-shaped clamp (231) and the rotating plate (23). A ring frame (24) for changing the position of the U-shaped clamp (231) is provided below the rotating plate (23). A sleeve (221) is rotatably sleeved on the support shaft (22), and a first incomplete gear (222), a second incomplete gear (223) and a third incomplete gear (224) are fixedly mounted on the outside of the sleeve (221) from top to bottom.

2. The PCB board test bench for locomotive electronic products according to claim 1, characterized in that: The ring frame (24) is fixedly installed inside the protective shell (1). The support shaft (22) and the sleeve (221) are fixedly installed with a plurality of evenly distributed first ratchet teeth (226). The sleeve (221) is fixedly installed with a mating ratchet tooth that cooperates with the first ratchet teeth (226). The sleeve (221) and the support (21) are fixedly connected with a torsion spring (225) for resetting. The lower end of the support shaft (22) is slidably fitted with a plurality of sliders (227). The sliders (227) and the support shaft (22) are fixedly connected with a pressure spring (228). The support (21) is provided with a plurality of slots that cooperate with the sliders (227).

3. The PCB board test bench for locomotive electronic products according to claim 2, characterized in that: A sliding bracket (241) is provided above the annular frame (24). A first V-shaped frame (242) is slidably installed on the annular frame (24) at the position corresponding to the return material component (4). A first arc-shaped frame (243) is fixedly installed above the first V-shaped frame (242). A second arc-shaped frame (244) is fixedly installed below the first V-shaped frame (242). A second V-shaped frame (245) is slidably installed on the annular frame (24) at the position corresponding to the first rotating wheel (7). The second V-shaped frame (245) is located below... A third arc-shaped frame (246) is fixedly installed on the square, and a fourth arc-shaped frame (247) is fixedly installed below the third arc-shaped frame (246). The ring frame (24) has a third V-shaped frame (248) at the position corresponding to the needle bed component (3). The first V-shaped frame (242) and the second V-shaped frame (245) are both fixedly installed on the sliding bracket (241). The ring frame (24) is fixedly installed inside the protective shell (1) through the first bracket. The sliding bracket (241) is slidably connected to the first bracket through the slide rod.

4. The PCB board test bench for locomotive electronic products according to claim 3, characterized in that: A Z-shaped plate (233) is fixedly installed below the U-shaped clamp (231), and a sliding rod (234) is fixedly installed below the Z-shaped plate (233). A drive motor (25) is fixedly installed on the outside of the support (21). A transmission gear (251) is slidably installed on the drive end of the drive motor (25). The number of teeth of the first incomplete gear (222) is half the number of teeth of the transmission gear (251), the number of teeth of the second incomplete gear (223) is one-quarter the number of teeth of the transmission gear (251), and the number of teeth of the third incomplete gear (224) is half the number of teeth of the transmission gear (251).

5. The PCB board test bench for locomotive electronic products according to claim 4, characterized in that: The support (21) is provided with two first electric lifting rods (26) arranged diagonally on the outside, and two second electric lifting rods (261) arranged diagonally on the outside. The two first electric lifting rods (26) and the two second electric lifting rods (261) are evenly distributed on the outside of the support (21). The support shaft (22) is provided with a lifting frame (262) on the outside. The lifting frame (262) is rotatably mounted on the transmission gear (251). The telescopic ends of the first electric lifting rods (26) and the second electric lifting rods (261) are fixedly mounted on the lifting frame (262). A connecting spring (263) is fixedly mounted on the lifting frame (262). The end of the connecting spring (263) away from the lifting frame (262) is fixedly mounted on the sliding bracket (241).

6. The PCB board test bench for locomotive electronic products according to claim 5, characterized in that: The return material component (4) includes a U-shaped frame (41), on which a plurality of evenly distributed unloading baffles (411) are fixedly installed. Dyed cotton (412) for marking PCBs is fixedly installed on the U-shaped frame (41). Two rotating arms (42) are rotatably installed on one side of the U-shaped frame (41). Synchronous gears (421) are fixedly installed at the ends of the two rotating arms (42). The two synchronous gears (421) are driven by a chain. A second bracket is fixedly installed on the outside of the protective shell (1). The two synchronous gears (421) are rotatably installed on the second bracket. A first motor for driving the synchronous gears (421) to rotate is fixedly installed on the second bracket.

7. A PCB board test bench for locomotive electronic products according to claim 6, characterized in that: The feeding component (6) includes a transmission bracket (61), a first conveyor belt (62) is installed inside the transmission bracket (61), a storage frame (64) is provided above the transmission bracket (61), the storage frame (64) is fixedly installed outside the protective shell (1), a plurality of evenly distributed first protrusions (621) are fixedly installed on the first conveyor belt (62), side plates (611) are fixedly installed on both sides of the upper end of the transmission bracket (61), a fixed frame (63) is provided below the transmission bracket (61), a servo motor (631) is fixedly installed above the fixed frame (63), a rotating frame (632) is rotatably installed at the top of the fixed frame (63), and the rotating frame (632) is fixedly installed at the bottom end of the transmission bracket (61).

8. The PCB board test bench for locomotive electronic products according to claim 7, characterized in that: A material pick-up bracket (5) is fixedly installed on the outside of the protective shell (1) at the position corresponding to the return material component (4). Multiple evenly distributed support rods (51) are fixedly installed on the upper end of the material pick-up bracket (5). The height of the multiple support rods (51) gradually decreases. A second conveyor belt (65) is provided on the side of the transmission bracket (61) close to the protective shell (1). Multiple evenly distributed second protrusions (651) are fixedly installed on the second conveyor belt (65). The second conveyor belt (65) extends to one side of the needle bed component (3). The second conveyor belt (65) is fixedly installed on the protective shell (1).

9. A PCB board test bench for locomotive electronic products according to claim 8, characterized in that: The needle bed component (3) includes a support frame (31), a plurality of evenly distributed hydraulic cylinders (32) are fixedly installed on the upper part of the support frame (31), a movable frame (33) is provided below the support frame (31), a rotating plate (331) is rotatably installed in the middle of the movable frame (33), a first needle bed (332) is detachably installed above the rotating plate (331), a second needle bed (333) is detachably installed below the support frame (31), a ratchet (34) is rotatably installed on one side of the movable frame (33), the ratchet (34) is fixedly connected to the rotating plate (331) through a rotating shaft, a ratchet plate (35) that cooperates with the ratchet (34) is fixedly installed inside the protective shell (1), and a support platform (36) is provided below the movable frame (33), the support platform (36) is fixedly installed inside the protective shell (1).

10. A PCB board test bench for locomotive electronic products according to claim 9, characterized in that: The first rotating wheel (7) and the second rotating wheel (8) are both fixedly connected to the inside of the protective shell (1) by the second spring telescopic rod. The first rotating wheel (7) is located above the U-shaped clamp (231), and the second rotating wheel (8) is located below the U-shaped clamp (231). The first storage box (71) is fixedly installed inside the protective shell (1) at the position corresponding to the first rotating wheel (7). The second storage box (81) is fixedly installed outside the protective shell (1) at the position corresponding to the second rotating wheel (8). The protective shell (1) has a slot for ejecting the PCB board. The first rotating wheel (7) and the second rotating wheel (8) are both equipped with a second motor for providing their rotation.

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