A testing device for frequency converter production

Abstract

This utility model discloses a testing device for inverter production, including a base plate. Multiple support legs are fixedly installed on the bottom side of the base plate, and two fixing plates are fixedly installed on the top side of the base plate. The top side of the two fixing plates is equipped with the same testing component. Both fixing plates have circular holes, and rotating rods are installed within each of the two circular holes. Clamping components are installed at the ends of the two rotating rods that are close to each other. In the transmission component, a second synchronous wheel on the outer side of the rotating column and a first synchronous wheel on the rotating rod are driven by a synchronous belt. Turning a handwheel drives the rotating column to rotate, causing the two rotating rods to rotate synchronously, which in turn causes the clamping plate to flip the circuit board. Two electric push rods in the clamping component push the clamping plate to clamp the circuit board. An optical inspection device in the testing component inspects the circuit board. Compared to traditional step-by-step testing devices, this device eliminates the need to remove and re-clamp the circuit board, reducing testing steps, significantly shortening testing time, and improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter manufacturing technology, and in particular to a testing device for frequency converter manufacturing. Background Technology

[0002] In inverter manufacturing, PCB (printed circuit board) is the core carrier, and the quality of its solder joints directly affects the electrical performance and reliability of the equipment. According to statistics, solder joint defects (such as cold solder joints, bridging, and component misalignment) account for 35% to 40% of the causes of early inverter failures. [According to industry report data, with the popularization of double-sided surface mount technology (SMT) in inverter PCBs (such as arranging IGBT modules on the front and integrating driver chips on the back), the demand for full inspection of solder joints on both sides of the circuit board is becoming increasingly urgent.]

[0003] Currently, most traditional testing devices employ a step-by-step operation mode when performing double-sided testing on PCB boards. After completing the front-side testing, the original clamping structure needs to be removed manually or mechanically, the PCB board needs to be flipped over, and then clamped and fixed again using a fixture before the back-side testing can be carried out. However, multiple disassembly and reassembly and repeated clamping significantly prolong the testing time, and frequent disassembly and reassembly can easily lead to a decrease in the repeatability accuracy of the PCB board due to human operation errors or mechanical positioning deviations. Therefore, a testing device for inverter production is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a testing device for inverter production, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A testing device for inverter production includes a base plate with multiple support legs fixedly installed on its bottom side and two fixing plates fixedly installed on its top side. The top sides of the two fixing plates are equipped with the same testing component. Both fixing plates have circular holes, and rotating rods are installed within each hole. Clamping components are installed at the ends of the two rotating rods that are close to each other, and first synchronous pulleys are fixedly sleeved at the ends that are far apart from each other. Two mounting plates are fixedly installed on the bottom side of the base plate, and a transmission component is installed between the two mounting plates. A positioning component is installed on one side of the right fixing plate.

[0007] Preferably, the detection assembly includes two fixed plates with the same top plate fixedly connected to their top sides. The top plate is U-shaped, and an optical detection device is fixedly connected to its bottom side.

[0008] Preferably, the clamping assembly includes two rotating rods, each with a connecting box fixedly connected to one end of each rod close to the other. An electric push rod is fixedly installed on the inner wall of one side of each connecting box close to the other. The output ends of the two electric push rods pass through the connecting box and are fixedly connected to clamping plates. The opposite surfaces of the two clamping plates are fixedly connected to the same protective pad.

[0009] Preferably, the transmission assembly includes a circular hole in the right mounting plate, a rotating column disposed in the circular hole, one end of the rotating column being rotatably connected to one side of the left mounting plate, two second synchronous pulleys being fixedly sleeved on the outer side of the rotating column, the second synchronous pulleys sharing the same synchronous belt with the first synchronous pulley, a handwheel being fixedly connected to the other end of the rotating column, a threaded hole and multiple threaded grooves being respectively opened on one side of the handwheel and one side of the right mounting plate, a threaded column being threadedly installed in one threaded hole, and the other end of the threaded column being threadedly installed into a threaded groove aligned with one of the threaded holes.

[0010] Preferably, a set of limiting rings is fixedly sleeved on the outer side of each of the two rotating rods, with two limiting rings in each set, and the side of each set of limiting rings that is close to each other is respectively attached to the two sides of the fixed plate.

[0011] Preferably, the positioning component includes an angle disk fixedly connected to one side of the right fixed plate, and a pointer fixedly sleeved on the outside of the right rotating rod, with the pointer pointing to the angle disk.

[0012] Preferably, a controller is fixedly installed on the top side of the base plate, and the controller is electrically connected to the optical detection equipment and the electric push rod respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In the transmission assembly, the second synchronous pulley on the outer side of the rotating column and the first synchronous pulley on the rotating rod are driven by a synchronous belt. Turning the handwheel can drive the rotating column to rotate, causing the two rotating rods to rotate synchronously, which drives the clamping plate to flip the circuit board. In the clamping assembly, two electric push rods push the clamping plate to clamp the circuit board. The optical inspection equipment in the inspection assembly inspects the circuit board. Compared with the traditional step-by-step inspection device, this device does not require the removal and re-clamping of the circuit board, reducing the inspection steps, greatly shortening the inspection time, and improving the inspection efficiency.

[0015] 2. The positioning component includes an angle dial and a pointer. When the circuit board is flipped, the pointer moves on the angle dial to accurately adjust the flipping angle. When the pointer rotates to the 180-degree mark, the circuit board completes a precise flip. The limiting rings on the outer sides of the two rotating rods limit the rotation, ensuring that they can only rotate and not shift left or right. This ensures stable synchronous belt drive and avoids the positioning deviation problem caused by multiple disassemblies and reassemblies in traditional detection devices, thus ensuring the consistency and accuracy of double-sided circuit board detection. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 The structure of this utility model Figure 1 Partial schematic diagram of section A;

[0018] Figure 3 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the rotating column part of the structure of this utility model.

[0020] In the diagram: 1. Base plate; 2. Fixing plate; 3. Top plate; 4. Optical inspection equipment; 5. Rotating rod; 6. Connecting box; 7. Electric push rod; 8. Clamping plate; 9. First synchronous pulley; 10. Mounting plate; 11. Rotating column; 12. Second synchronous pulley; 13. Synchronous belt; 14. Handwheel; 15. Threaded column; 16. Limit ring; 17. Angle plate; 18. Pointer; 19. Controller; 20. Support leg. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figure 1-4A testing device for inverter production includes a base plate 1. Multiple support legs 20 are fixedly mounted on the bottom side of the base plate 1. Two fixing plates 2 are fixedly mounted on the top side of the base plate 1. A common testing component is disposed on the top side of the two fixing plates 2. Both fixing plates 2 have circular holes, and rotating rods 5 are disposed within each of the two circular holes. Clamping components are disposed at the ends of the two rotating rods 5 that are close to each other, and first synchronous pulleys 9 are fixedly sleeved at the ends of the two rotating rods 5 that are far apart from each other. Two mounting plates 10 are fixedly mounted on the bottom side of the base plate 1. A transmission component is disposed between the two mounting plates 10. A positioning component is disposed on one side of the right fixing plate 2. The transmission component includes a circular hole in the right mounting plate 10, within which a rotating column 11 is disposed. One end of the rotating column 11 is rotatably connected to one side of the left mounting plate 10. Two second synchronous pulleys 12 are fixedly sleeved on the outside of the rotating column 11. The second synchronous pulleys 12 and the first synchronous pulleys 9 share the same synchronous belt 13. Two second synchronous pulleys 12 are fixedly sleeved on the outside of the rotating column 11. A synchronous belt 13 is provided between each of the two second synchronous pulleys 12 and the two first synchronous pulleys 9. Therefore, under the meshing rotation of the two synchronous belts 13, the two first synchronous pulleys 9 will drive the rotating rods 5 connected to them to rotate. This causes the two rotating rods 5 to synchronously drive the clamping plate 8 on one side of the connecting box 6 to rotate synchronously, thereby realizing the clamping and flipping of the circuit board. Then, the solder joint defects, component misalignment, solder paste defects, etc. on the back of the circuit board can be detected.

[0023] Specifically, the inspection assembly includes two fixed plates 2 with a single top plate 3 fixedly connected to their top sides. The top plate 3 is U-shaped, and an optical inspection device 4 is fixedly connected to its bottom side. The clamping assembly includes two rotating rods 5 with connecting boxes 6 fixedly connected to their adjacent ends. Electric push rods 7 are fixedly installed on the inner walls of the adjacent sides of the two connecting boxes 6. The output ends of the two electric push rods 7 pass through the connecting boxes 6 and are fixedly connected to clamping plates 8. The opposite surfaces of the two clamping plates 8 are fixedly connected to the same protective pad. By setting two clamping plates 8, when it is necessary to inspect both sides of the circuit board, the circuit board to be inspected is placed between the two clamping plates 8. Then, the two electric push rods 7 are started simultaneously to bring the two clamping plates 8 closer together, thereby completing the stable clamping of the circuit board. Since the opposite surfaces of the two clamping plates 8 are fixedly connected to the protective pad, the two protective pads can prevent the clamping plates 8 from directly contacting the circuit board and causing damage to the circuit board. After clamping, the optical inspection device 4 can be started to inspect one side of the circuit board for issues such as solder joint defects, component misalignment, and solder paste defects.

[0024] Specifically, a handwheel 14 is fixedly connected to the other end of the rotating column 11. A threaded hole and multiple threaded grooves are respectively opened on one side of the handwheel 14 and the right mounting plate 10. A threaded column 15 is threadedly installed in one of the threaded holes. The other end of the threaded column 15 is threaded into the threaded groove that is aligned with the threaded hole. By setting the threaded column 15, after the angle is adjusted, the threaded column 15 is threaded into the threaded hole opened in the handwheel 14. Then, by continuing to rotate the threaded column 15, the other end of the threaded column 15 can be threaded into the threaded groove that is aligned with the threaded hole, thereby realizing the fixed connection between the handwheel 14 and the right mounting plate 2. This avoids the two rotating rods 5 from rotating on their own during the testing process, which would lead to inaccurate test results.

[0025] Specifically, a set of limiting rings 16 are fixedly sleeved on the outer side of each of the two rotating rods 5. There are two limiting rings 16 in each set. The side of each limiting ring 16 that is close to each other is respectively attached to the two sides of the fixed plate 2. By setting two sets of limiting rings 16, the two sets of limiting rings 16 play a limiting role on the two rotating rods 5, so that they can only rotate and will not deviate to the left or right, thereby ensuring that the transmission of the synchronous belt 13 remains stable.

[0026] Specifically, the positioning component includes an angle disk 17 fixedly connected to one side of the right fixed plate 2, and a pointer 18 fixedly sleeved on the outside of the right rotating rod 5. The pointer 18 points to the angle disk 17. By setting the angle disk 17, during the flipping process, the pointer 18 fixedly sleeved on the outside of the rotating rod 5 will also move synchronously on the angle disk 17. Personnel can adjust the position by pointing to the angle disk 17 to ensure that subsequent detection will not be erroneous due to tilt.

[0027] Specifically, a controller 19 is fixedly installed on the top side of the base plate 1. The controller 19 is electrically connected to the optical inspection equipment 4 and the electric push rod 7 respectively. By setting up the controller 19, and because the controller 19 is electrically connected to the optical inspection equipment 4 and the electric push rod 7, the operation of the optical inspection equipment 4 and the synchronous operation of the two electric push rods 7 can be controlled by the controller 19.

[0028] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be any conventional known device, such as a computer, that can control the operation of the electrical components mentioned in the article.

[0029] In use: Place the circuit board to be inspected horizontally in the gap between the two clamping plates 8. Then, simultaneously activate the two electric push rods 7. The telescopic rods of the electric push rods 7 extend smoothly, pushing the two clamping plates 8 closer together along the guide rail until the circuit board is securely clamped. Since the opposing surfaces of the two clamping plates 8 are fixedly connected with elastic protective pads made of soft silicone, the protective pads provide sufficient friction to prevent the circuit board from sliding and prevent the clamping plates 8 from directly contacting the circuit board surface, effectively preventing component damage or PCB scratches during clamping. After clamping and fixing, activate the optical inspection device 4. This device is equipped with a high-resolution industrial camera and a ring shadowless light source, which can perform an all-round scan of the top side of the circuit board to accurately detect problems such as cold solder joints, component misalignment, and solder paste defects. When it is necessary to inspect the other side of the circuit board, the operator... The operator holds the handwheel 14 and rotates it clockwise, causing the rotating column 11, which is fixedly connected to it, to rotate synchronously. The two second synchronous wheels 12, which are fixedly sleeved on the outside of the rotating column 11, rotate accordingly. Through the meshing transmission of the synchronous belt 13, the rotational power is transmitted to the two first synchronous wheels 9. The first synchronous wheels 9 drive the rotating rod 5 to rotate smoothly in the bearing seat of the connecting box 6, thereby driving the clamping plates 8 on both sides to rotate synchronously. During the rotation process, the pointer 18, which is fixedly sleeved on the rotating rod 5, always corresponds to the angle disk 17. When the pointer 18 rotates to the 180° scale line, the circuit board has just completed a 180-degree rotation, ensuring that its back is facing up and remains in a horizontal state. At this time, the optical inspection equipment 4 is started again to perform the same standard inspection on the back of the circuit board, ensuring the consistency and accuracy of double-sided inspection and avoiding inspection errors caused by the deviation of the rotation angle.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection device for frequency converter production, comprising a base plate (1), characterized in that, Multiple support legs (20) are fixedly installed on the bottom side of the base plate (1). Two fixing plates (2) are fixedly installed on the top side of the base plate (1). The same detection component is provided on the top side of the two fixing plates (2). Both fixing plates (2) have round holes. Rotating rods (5) are provided in both round holes. Clamping components are provided at the ends of the two rotating rods (5) that are close to each other. First synchronous wheels (9) are fixedly sleeved at the ends of the two rotating rods (5) that are far apart from each other. Two mounting plates (10) are fixedly installed on the bottom side of the base plate (1). A transmission component is provided between the two mounting plates (10). A positioning component is provided on one side of the right fixing plate (2).

2. The detection device for frequency converter production according to claim 1, characterized in that, The detection assembly includes two fixed plates (2) with the same top plate (3) fixedly connected to their top sides. The top plate (3) is U-shaped and an optical detection device (4) is fixedly connected to its bottom side.

3. The detection device for frequency converter production according to claim 1, characterized in that, The clamping assembly includes two rotating rods (5) with one end of each rod fixedly connected to a connecting box (6). Electric push rods (7) are fixedly installed on the inner walls of the two connecting boxes (6) with one end of each rod close to the other. The output ends of the two electric push rods (7) pass through the connecting box (6) and are fixedly connected to clamping plates (8). The opposite surfaces of the two clamping plates (8) are fixedly connected to the same protective pad.

4. The detection device for frequency converter production according to claim 1, characterized in that, The transmission assembly includes a right mounting plate (10) with a circular hole, a rotating column (11) inside the circular hole, one end of the rotating column (11) being rotatably connected to one side of the left mounting plate (10), two second synchronous pulleys (12) being fixedly sleeved on the outside of the rotating column (11), the second synchronous pulleys (12) and the first synchronous pulley (9) sharing the same synchronous belt (13), and a handwheel (14) being fixedly connected to the other end of the rotating column (11), a threaded hole and multiple threaded grooves being respectively opened on one side of the handwheel (14) and one side of the right mounting plate (10), a threaded column (15) being threadedly installed in one threaded hole, and the other end of the threaded column (15) being threadedly installed into the threaded groove aligned with one threaded hole.

5. The detection device for frequency converter production according to claim 1, characterized in that, Two sets of limiting rings (16) are fixedly sleeved on the outer sides of the two rotating rods (5). There are two sets of limiting rings (16) in each set. The side of each set of limiting rings (16) that is close to each other is attached to the two sides of the fixed plate (2).

6. The detection device for frequency converter production according to claim 1, characterized in that, The positioning assembly includes an angle disk (17) fixedly connected to one side of the right fixed plate (2), and a pointer (18) fixedly sleeved on the outside of the right rotating rod (5), with the pointer (18) pointing to the angle disk (17).

7. The detection device for frequency converter production according to claim 1, characterized in that, A controller (19) is fixedly installed on the top side of the base plate (1). The controller (19) is electrically connected to the optical detection equipment (4) and the electric push rod (7).

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