PCB appearance detection machine

Abstract

The utility model discloses a PCB appearance detection machine, including placing machine table, feeding mechanism, transfer mechanism and detection mechanism, and feeding mechanism sets up in one end of placing machine table top, transfer mechanism includes support part, guide portion, roof support part and transfer part, and support part fixedly connected in the top of placing machine table, and the bottom of guide portion is slidably connected with the top of support part, and transfer part is sleeved in the outer wall of guide portion, and roof support part is set between the junction of guide portion and support part, detection mechanism sets up in the top of placing machine table. The utility model PCB is transferred when in the top of transfer part, and roof support part props up guide portion and transfer part, when needing to carry out the positioning detection of PCB, roof support part no longer props up transfer part, and transfer part is hidden behind the top of detection support piece, and it no longer carries out transfer, and after PCB stops, can use detection mechanism to carry out accurate positioning scanning detection, and the precision of PCB detection is improved in this way.

Description

Technical Field

[0001] This utility model relates to the field of appearance inspection equipment, and in particular to a PCB board appearance inspection machine. Background Technology

[0002] With the rapid development of electronic technology, printed circuit boards (PCBs), as a fundamental component of electronic devices, play a crucial role. A PCB is a circuit carrier formed by printing circuit patterns onto an insulating substrate. The PCB manufacturing process includes multiple stages: design, material selection, printing, etching, drilling, coating, and assembly. Throughout this process, the quality of the PCB directly affects the performance and reliability of the final electronic product. Therefore, PCB testing and quality control are of paramount importance.

[0003] Existing PCB board appearance inspection machines combine scanning and stamping to identify and point out problems with the appearance of PCB boards. However, existing equipment uses a continuous conveyor line to transport the PCB boards during inspection. This means the PCB boards are constantly moving during the inspection process, resulting in blurred edges in the images captured during scanning. Consequently, when it is necessary to focus on inspecting areas where the PCB board has been drilled or etched, it is impossible to stop the transport of the PCB board for accurate inspection, thus affecting the accuracy of the PCB board appearance inspection. Therefore, this solution proposes a new PCB board appearance inspection machine to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a PCB board appearance inspection machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a PCB board appearance inspection machine, comprising:

[0006] Placement of the machine;

[0007] The feeding mechanism is located at one end of the top of the placement platform and is used for horizontal and vertical feeding of the PCB board to be inspected.

[0008] A transfer mechanism is used for transferring PCB boards during the inspection process. The transfer mechanism includes a support part, a guide part, a top support part, and a transfer part. The support part is fixedly connected to the top of the placement machine. The bottom of the guide part is slidably connected to the top of the support part. The transfer part is sleeved on the outer wall of the guide part. The top support part is located between the connection between the guide part and the support part.

[0009] The testing mechanism is located at the top of the placement platform and is mounted above the transfer mechanism. The testing mechanism is used for photographing and scanning PCB boards and stamping NG (Not Good) marks.

[0010] Preferably, the feeding mechanism includes:

[0011] A support frame, wherein a support leg is fixedly connected to the bottom end of the support frame, and the bottom end of the support leg is fixedly connected to the top end of the placement platform;

[0012] A drive unit, wherein the drive unit is disposed at one end of the support frame;

[0013] Conveying rollers, multiple sets of conveying rollers are arranged in a horizontal longitudinal direction on the top of the support frame, and one end of each set of conveying rollers is connected to the drive unit for transmission.

[0014] Preferably, the driving unit includes:

[0015] A drive motor is provided at the bottom of the support frame, and a drive pulley is provided at the output end of the drive motor;

[0016] Driven pulleys, with locking feet, are respectively sleeved on one end of multiple sets of conveyor rollers, and the multiple sets of driven pulleys are used for transmission with drive pulleys;

[0017] The first tensioning pulley, and multiple sets of the first tensioning pulleys are respectively disposed at the gaps of multiple sets of driven pulleys. The multiple sets of the first tensioning pulleys are used for tensioning when multiple sets of driven pulleys are driven by the drive pulleys.

[0018] Preferably, the support includes multiple support frames, which are symmetrically arranged along a horizontal longitudinal direction, and the guide is slidably connected to the top of the multiple support frames.

[0019] Preferably, the guide portion includes:

[0020] Support side frames, the bottoms of multiple support side frames are slidably connected to the tops of multiple support base frames respectively, the top support is provided at the bottom of the connection between the support side frame and the support base frame, and a detection support is provided between the opposite sides of the multiple support side frames;

[0021] The guide supports are fixedly connected to the top of the multiple support side frames, and the multiple guide supports are used for supporting and guiding the transfer part.

[0022] Preferably, the detection support includes a support platform, which is disposed between opposite sides of multiple support side frames. Multiple positioning legs are fixedly connected to the bottom end of the support platform, and the bottom of each of the multiple positioning legs is fixedly connected to the top end of the placement platform.

[0023] Preferably, the top support includes a top support cylinder unit, the side wall of which is fixedly connected to the side wall of the support base frame, and the output end of which is fixedly connected to the bottom end of the support side frame.

[0024] Preferably, the transfer unit includes:

[0025] A rotary motor is mounted on the top of the machine platform, and a first pulley is fitted onto the output end of the rotary motor.

[0026] A transmission support frame, comprising multiple transmission support frames fixedly connected to the bottom end of the machine platform along a horizontal direction, wherein each transmission support frame is provided with a transfer component at its top, and a transmission rod is interlaced between the bottom ends of the multiple transmission support frames, wherein a second pulley is fitted at one end of the transmission rod, and a first transmission belt is fitted between the outer wall of the second pulley and the first pulley, and a third pulley is fitted at the middle and the other end of the transmission rod, wherein the third pulley is used for transmission connection with the rotating component.

[0027] Preferably, the transfer component includes:

[0028] A pulley assembly, wherein pulleys are provided at both ends of the pulley assembly, and multiple pulley assemblies are respectively inserted and connected to the top of multiple transmission supports, and a second transmission belt is sleeved between one end of the pulley assembly and the third pulley;

[0029] The fourth pulley, and multiple sets of the fourth pulleys are symmetrically connected in pairs along the horizontal longitudinal direction to the top of the support side frame. A third transmission belt is sleeved between the other end of the multiple sets of the fourth pulleys and the multiple sets of pulleys. A second tensioning pulley is provided on the outer wall of the multiple sets of the third transmission belt and at the top of the transmission support frame.

[0030] Preferably, the testing organization includes:

[0031] A fixed support frame, wherein a fixed support leg is fixedly connected to the bottom end of the fixed support frame, and the bottom of the fixed support leg is fixedly connected to the top end of the machine platform.

[0032] A horizontal lateral movement module, multiple sets of which are symmetrically arranged at the top of the fixed support along the horizontal longitudinal direction;

[0033] A first horizontal longitudinal moving module, the bottom of which is fixedly connected to the output end of multiple horizontal transverse moving modules, and an image-taking unit is fixedly connected to the output end of the first horizontal longitudinal moving module. The image-taking unit is used for image scanning of the PCB board to be inspected.

[0034] The second horizontal longitudinal movement module, multiple sets of the second horizontal longitudinal movement module are fixedly connected to the output ends of multiple sets of horizontal transverse movement modules, and each output end of the multiple sets of the second horizontal longitudinal movement module is fixedly connected to a stamping unit.

[0035] The technical effects and advantages of this utility model are as follows:

[0036] This utility model features an optimized design for the transfer mechanism. First, a support unit is fixedly connected to the placement platform, forming a support connection. Then, a guide unit is slidably connected to the support unit, and a top support unit provides a movable support connection. This allows the transfer unit, mounted on the guide unit, to move vertically along with it. When the PCB board is being transferred at the top of the transfer unit, the top support unit supports both the guide unit and the transfer unit, suspending the PCB board for transfer. When PCB board positioning and detection are required, the top support unit stops supporting the transfer unit, and the transfer unit moves downwards with the guide unit. Once the transfer unit is concealed at the top of the detection support, it ceases its transfer. After the PCB board stops, the detection mechanism can perform precise positioning and scanning detection, thereby improving the accuracy of PCB board detection. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0038] Figure 2 This is a top view of the overall structure of this utility model.

[0039] Figure 3 This is a schematic diagram of the feeding mechanism of this utility model.

[0040] Figure 4 This is a schematic diagram showing the structural connection between the transfer mechanism and the testing support component of this utility model.

[0041] Figure 5 This is a side view showing the structural connection between the transfer mechanism and the detection support of this utility model.

[0042] Figure 6 This is a schematic diagram of the transfer mechanism of this utility model.

[0043] Figure 7 This is a schematic diagram of the structure of the testing mechanism of this utility model.

[0044] In the diagram: 1. Placement platform; 2. Feeding mechanism; 201. Support frame; 202. Support leg; 203. Drive motor; 204. Drive pulley; 205. Driven pulley; 206. First tension pulley; 207. Conveyor roller; 3. Transfer mechanism; 301. Support side frame; 302. Support base frame; 303. Guide support frame; 304. Rotary motor; 305. First pulley; 306. Second pulley; 307. First transmission belt; 308. Transmission support frame; 30 9. Transmission rod; 310. Third pulley; 311. Pulley assembly; 312. Second transmission belt; 313. Second tension pulley; 314. Third transmission belt; 315. Fourth pulley; 316. Top support cylinder unit; 4. Support platform; 401. Positioning leg; 5. Fixed support frame; 501. Fixed support leg; 6. Horizontal transverse movement module; 7. First horizontal longitudinal movement module; 701. Photo taking unit; 8. Second horizontal longitudinal movement module; 801. Stamping unit. Detailed Implementation

[0045] 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.

[0046] Example 1: This utility model provides the following... Figure 1 , Figure 2 and Figure 7 The PCB board appearance inspection machine shown includes:

[0047] Placement machine 1 and inspection mechanism are provided. The inspection mechanism is located at the top of placement machine 1 and is mounted above transfer mechanism 3. The inspection mechanism is used for photographing and scanning PCB boards and stamping NG (Not Found) marks.

[0048] Specifically, the testing institutions include:

[0049] A fixed support frame 5 is fixedly connected to a fixed support leg 501 at its bottom end. The bottom of the fixed support leg 501 is fixedly connected to the top of the placement platform 1. By fixing the fixed support leg 501 to the placement platform 1, a horizontal and longitudinally symmetrical placement structure is erected using the fixed support frame 5. In this scheme, two sets of fixed support frames 5 are selected.

[0050] Horizontal transverse movement module 6, multiple sets of horizontal transverse movement modules 6 are symmetrically arranged at the top of the fixed support frame 5 along the horizontal longitudinal direction. This solution adopts two sets of horizontal transverse movement modules 6, which are respectively arranged at the top of two sets of fixed support frames 5, and the two sets of horizontal transverse movement modules 6 are driven to operate synchronously.

[0051] The bottom of the first horizontal vertical movement module 7 is fixedly connected to the output end of multiple sets of horizontal horizontal movement modules 6. The output end of the first horizontal vertical movement module 7 is fixedly connected to an imaging unit 701, which is used for imaging and scanning the PCB board to be inspected. This solution sets up a first horizontal vertical movement module 7, which is driven by two sets of synchronously operating horizontal horizontal movement modules 6 to move horizontally. The imaging unit 701 consists of a vertically moving structure carrying an imaging device. The vertically moving structure adjusts the height of the imaging device from the ground to adjust the image clarity.

[0052] The second horizontal longitudinal movement module 8, multiple sets of the second horizontal longitudinal movement module 8 are fixedly connected to the output ends of multiple sets of horizontal transverse movement modules 6 respectively. Each output end of the multiple sets of the second horizontal longitudinal movement module 8 is fixedly connected to a stamping unit 801. This scheme designs two sets of the second horizontal longitudinal movement module 8, and the two sets of the second horizontal longitudinal movement module 8 are respectively connected to two sets of horizontal transverse movement modules 6, thereby driving the two sets of stamping units 801 to move respectively. The stamping unit 801 consists of a vertical movement structure carrying a stamp, and uses vertical movement to perform the stamping operation.

[0053] Example 2: This utility model provides the following... Figure 3 The feeding mechanism 2 shown is applied to a PCB board appearance inspection machine in Embodiment 1. The feeding mechanism 2 is set at one end of the top of the placement table 1 and is used for horizontal and vertical feeding of the PCB board to be inspected.

[0054] Specifically, the feeding mechanism 2 includes:

[0055] The support frame 201 has a support leg 202 fixedly connected to its bottom end, and the bottom end of the support leg 202 is fixedly connected to the top end of the placement platform 1.

[0056] A drive unit is located at one end of the support frame 201;

[0057] Conveying rollers 207, multiple sets of conveying rollers 207 are arranged in a horizontal longitudinal direction on the top of the support frame 201, and one end of each set of conveying rollers 207 is connected to the drive unit for transmission. The two ends of each set of conveying rollers 207 are respectively inserted into the two ends of the top of the support frame 201, and a bearing structure is provided at the insertion point with the support frame 201.

[0058] Furthermore, the drive unit includes:

[0059] A drive motor 203 is located at the bottom of the support frame 201, and a drive pulley 204 is provided at the output end of the drive motor 203.

[0060] Driven pulley 205 and locked driven pulley 205 are respectively sleeved on one end of multiple sets of conveying rollers 207, and multiple sets of driven pulleys 205 are used to drive the drive pulley 204.

[0061] The first tensioning pulley 206, and multiple sets of first tensioning pulleys 206 are respectively arranged at the gaps of multiple sets of driven pulleys 205. The multiple sets of first tensioning pulleys 206 are used for tensioning when multiple sets of driven pulleys 205 are driven by the drive pulley 204.

[0062] It should be noted that in the actual setup, a belt is wrapped around the drive pulley 204 and multiple driven pulleys 205, allowing the drive pulley 204 and multiple driven pulleys 205 to operate synchronously via the drive motor 203. At the same time, to ensure transmission efficiency, the belt is pressed by the first tensioner 206, making it fit more closely to the outer wall of the drive pulley 204 and multiple driven pulleys 205, ensuring transmission stability. With this structural setup, when the drive motor 203 starts, the transmission between the drive pulley 204 and driven pulleys 205 drives multiple sets of conveyor rollers 207 to rotate, thereby enabling the PCB board to operate.

[0063] Example 3: This utility model provides the following... Figure 4 - Figure 6 The transfer mechanism 3 shown is applied to a PCB board appearance inspection machine in Embodiment 1. The transfer mechanism 3 is used for the transfer of PCB boards during the inspection process. The transfer mechanism 3 includes a support part, a guide part, a top support part and a transfer part. The support part is fixedly connected to the top of the placement platform 1. The bottom of the guide part is slidably connected to the top of the support part. The transfer part is sleeved on the outer wall of the guide part. The top support part is located between the connection between the guide part and the support part.

[0064] Specifically, the support includes multiple support bases 302, which are symmetrically arranged along the horizontal longitudinal direction, and the guide is slidably connected to the top of the multiple support bases 302.

[0065] Specifically, the guidance department includes:

[0066] Support side frame 301, the bottom of multiple support side frames 301 are slidably connected to the top of multiple support base frames 302 respectively, the top support is provided at the bottom of the connection between the support side frame 301 and the support base frame 302, and a detection support is provided between the opposite sides of the multiple support side frames 301;

[0067] Guide support 303, multiple guide support 303 are fixedly connected to the top of multiple support side frames 301 respectively, and the multiple guide support 303 are used for supporting and guiding the transfer part.

[0068] It should be noted that a protruding ferrule structure is provided at the bottom of the support side frame 301, and a protruding insertion structure is provided at the top of the support base frame 302. The support side frame 301 and the support base frame 302 form a guide rail-like sliding connection through the ferrule structure and the insertion structure.

[0069] Furthermore, the testing support includes a support platform 4, which is positioned between the opposite sides of multiple support side frames 301. Multiple positioning legs 401 are fixedly connected to the bottom of the support platform 4, and the bottom of each positioning leg 401 is fixedly connected to the top of the placement platform 1. A belt groove is provided at the top of the support platform 4 to accommodate the belt, so that the PCB board to be tested can be placed on the top of the support platform 4, thereby facilitating the testing mechanism to perform testing and stamping.

[0070] Specifically, the top support includes a top support cylinder unit 316, the side wall of the top support cylinder unit 316 is fixedly connected to the side wall of the support base 302, and the output end of the top support cylinder unit 316 is fixedly connected to the bottom end of the support side frame 301.

[0071] It should be noted that the top support cylinder unit 316 consists of a top support cylinder and a connecting frame structure. The connecting frame fixes the outer wall of the top support cylinder to the side wall of the support base 302. Then, the output end of the top support cylinder is connected and fixed to the bottom end of the support side frame 301. When the top support cylinder outputs and lifts the support side frame 301, the support side frame 301 drives the transfer unit to move upward. The transfer unit can then transfer the PCB board. When the top support cylinder stops supporting the support side frame 301, the transfer unit falls to the level of the support platform 4. After the PCB board falls to the top of the support platform 4, the PCB board cannot move, thereby realizing the positioning detection of the PCB board.

[0072] Specifically, the transshipment department includes:

[0073] A rotary motor 304 is mounted on the top of the machine platform 1, and a first pulley 305 is fitted onto the output end of the rotary motor 304.

[0074] A transmission support frame 308 is fixedly connected to the bottom of the machine platform 1 along a horizontal direction. Each of the transmission support frames 308 has a transfer component at its top. Transmission rods 309 are interlaced between the bottoms of the transmission support frames 308. A second pulley 306 is sleeved on one end of the transmission rod 309. A first transmission belt 307 is sleeved between the outer wall of the second pulley 306 and the first pulley 305. A third pulley 310 is sleeved on the middle and the other end of the transmission rod 309. The third pulley 310 is used for transmission connection with the rotating component.

[0075] It should be noted that multiple transmission support frames 308 are fixedly connected to the top of the placement platform 1 at equal intervals along the horizontal direction. A bearing structure is provided between the bottom of the transmission rod 309 and the multiple transmission support frames 308 to ensure that the transmission rod 309 can rotate stably. Multiple third pulleys 310 are provided along the rod wall to the end of the transmission rod 309 that is not connected to the first pulley 305, with the same gap as the multiple transmission support frames 308. The third pulleys 310 are the same as the first pulleys 305, and they all rotate synchronously with the transmission rod 309.

[0076] Furthermore, transshipment items include:

[0077] A pulley assembly 311 is provided at both ends of the pulley assembly 311. Multiple pulley assemblies 311 are respectively inserted and connected to the top of multiple transmission supports 308. A second transmission belt 312 is sleeved between one end of the pulley assembly 311 and the third pulley 310.

[0078] The fourth pulley 315, and multiple sets of fourth pulleys 315 are symmetrically connected in pairs along the horizontal longitudinal direction to the top of the support side frame 301. A third transmission belt 314 is sleeved between the other end of the multiple sets of fourth pulleys 315 and the multiple sets of pulleys 311. A second tensioning wheel 313 is provided on the outer wall of the multiple sets of third transmission belts 314 and at the top of the transmission support frame 308.

[0079] It should be noted that the pulley assembly 311 consists of a support rod and two pulleys. The support rod rotates and intersects with the top of the transmission support 308, with its two ends located on the front and back of the top of the transmission support 308, respectively. This structure is used to synchronously transmit the rotation at the transmission rod 309 to the top, thereby driving the third transmission belt 314 to operate. The top of the third transmission belt 314 is used for the transfer of the PCB board, and the third transmission belt 314 can intersect with the belt groove opened at the support platform 4. When the third transmission belt 314 is intersected in the belt groove at the support platform 4, the PCB board contacts the top of the support platform 4, and the PCB board will not be transferred at this time. However, when the third transmission belt 314 is placed above the support platform 4, the PCB board can be transferred.

[0080] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PCB board appearance inspection machine, characterized in that, include: Placement of machine platform (1); Feeding mechanism (2), the feeding mechanism (2) is located at one end of the top of the placement platform (1), the feeding mechanism (2) is used for horizontal and vertical feeding of the PCB board to be tested; The transfer mechanism (3) is used for the transfer of PCB board during the inspection process. The transfer mechanism (3) includes a support part, a guide part, a top support part and a transfer part. The support part is fixedly connected to the top of the placement table (1). The bottom of the guide part is slidably connected to the top of the support part. The transfer part is sleeved on the outer wall of the guide part. The top support part is located between the connection between the guide part and the support part. The testing mechanism is located at the top of the placement platform (1) and is mounted above the transfer mechanism (3). The testing mechanism is used for photographing and scanning the PCB board and stamping it with NG (Not Found) stamps.

2. The PCB board appearance inspection machine according to claim 1, characterized in that, The feeding mechanism (2) includes: A support frame (201) is provided, and a support leg (202) is fixedly connected to the bottom end of the support frame (201). The bottom end of the support leg (202) is fixedly connected to the top end of the placement platform (1). A drive unit is disposed at one end of the support frame (201); Conveying rollers (207), multiple sets of conveying rollers (207) are arranged in a horizontal longitudinal direction on the top of the support frame (201), and one end of the multiple sets of conveying rollers (207) is connected to the drive unit for transmission.

3. A PCB board appearance inspection machine according to claim 2, characterized in that, The drive unit includes: A drive motor (203) is provided at the bottom of the support frame (201), and a drive pulley (204) is provided at the output end of the drive motor (203); Driven pulley (205), the driven pulley (205) is respectively sleeved on one end of a plurality of conveying rollers (207), and the plurality of driven pulleys (205) are used to drive the drive pulley (204); The first tensioning pulley (206) and multiple sets of the first tensioning pulleys (206) are respectively disposed at the gaps of multiple sets of driven pulleys (205). The multiple sets of the first tensioning pulleys (206) are used for tensioning when multiple sets of driven pulleys (205) are driven by the drive pulley (204).

4. A PCB board appearance inspection machine according to claim 1, characterized in that, The support includes multiple support bases (302), which are symmetrically arranged along the horizontal longitudinal direction. The guide is slidably connected to the top of the multiple support bases (302).

5. A PCB board appearance inspection machine according to claim 4, characterized in that, The guide section includes: Support side frame (301), the bottom of the plurality of support side frames (301) are slidably connected to the top of the plurality of support base frames (302), the top support is provided at the bottom of the connection between the support side frame (301) and the support base frame (302), and a detection support is provided between the opposite sides of the plurality of support side frames (301); Guide supports (303), a plurality of guide supports (303) are fixedly connected to the top of a plurality of support side frames (301), and the plurality of guide supports (303) are used for supporting and guiding the transfer part.

6. A PCB board appearance inspection machine according to claim 5, characterized in that, The detection support includes a support platform (4), which is located between the opposite sides of multiple support side frames (301). Multiple positioning legs (401) are fixedly connected to the bottom of the support platform (4), and the bottom of the multiple positioning legs (401) is fixedly connected to the top of the placement platform (1).

7. A PCB board appearance inspection machine according to claim 5, characterized in that, The top support includes a top support cylinder unit (316), the side wall of which is fixedly connected to the side wall of the support base frame (302), and the output end of which is fixedly connected to the bottom end of the support side frame (301).

8. A PCB board appearance inspection machine according to claim 5, characterized in that, The transfer unit includes: A rotary motor (304) is disposed at the top of the placement platform (1), and a first pulley (305) is sleeved on the output end of the rotary motor (304); A transmission support frame (308) is fixedly connected to the bottom of the placement platform (1) in a horizontal direction. A transfer component is provided on the top of each of the transmission support frames (308). A transmission rod (309) is interlaced between the bottoms of the transmission support frames (308). A second pulley (306) is sleeved on one end of the transmission rod (309). A first transmission belt (307) is sleeved between the outer wall of the second pulley (306) and the outer wall of the first pulley (305). A third pulley (310) is sleeved on the middle part and the other end of the transmission rod (309). The third pulley (310) is used for transmission connection with the rotating component.

9. A PCB board appearance inspection machine according to claim 8, characterized in that, The transfer component includes: A pulley assembly (311) is provided with pulleys at both ends. Multiple pulley assemblies (311) are respectively inserted and connected to the top of multiple transmission supports (308). A second transmission belt (312) is sleeved between one end of the pulley assembly (311) and the third pulley (310). The fourth pulley (315) is symmetrically connected in pairs along the horizontal longitudinal direction to the top of the support side frame (301). A third transmission belt (314) is sleeved between the other end of the multiple sets of fourth pulleys (315) and the multiple sets of pulley groups (311). A second tensioning pulley (313) is provided on the outer wall of the multiple sets of third transmission belts (314) and at the top of the transmission support frame (308).

10. A PCB board appearance inspection machine according to claim 1, characterized in that, The testing institutions include: A fixed support frame (5) is fixedly connected to a fixed support leg (501) at its bottom end, and the bottom of the fixed support leg (501) is fixedly connected to the top end of the placement platform (1). A horizontal lateral movement module (6), multiple sets of the horizontal lateral movement modules (6) are symmetrically arranged at the top of the fixed support frame (5) along the horizontal longitudinal direction; The first horizontal longitudinal movement module (7) is fixedly connected to the output end of multiple horizontal transverse movement modules (6) at its bottom. The output end of the first horizontal longitudinal movement module (7) is fixedly connected to a photographing unit (701), which is used for photographing and scanning the PCB board to be inspected. The second horizontal longitudinal movement module (8) is fixedly connected to the output end of the multiple sets of horizontal transverse movement modules (6), and the output end of the multiple sets of second horizontal longitudinal movement modules (8) is fixedly connected to a stamping unit (801).

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