Carrying mechanism and corresponding PCB appearance inspection machine

Abstract

The utility model provides a transport mechanism and a PCB appearance inspection machine. The transport mechanism includes a transport platform, a glass table and a plurality of vacuum adsorption components. A plurality of positioning holes are provided on both longitudinal sides of the transport platform, and a plurality of vacuum adsorption components are arranged in two groups on both longitudinal sides of the transport platform. The vacuum adsorption component includes a positioning sleeve, a joint, a suction rod and a compression spring. The positioning sleeve is arranged in the positioning hole. The suction rod includes a main body and a convex part, the main body is vertically movable and inserted into the positioning sleeve, and the convex part is connected to the top of the main body. The joint is connected to the bottom end of the main body, and the compression spring is sleeved on the main body, and its two ends are respectively abutted against the convex part and the positioning sleeve. The PCB appearance inspection machine includes a base, an upper and lower plate mechanism, a scanning mechanism, an inspection mechanism and the above-mentioned transport mechanism. The transport mechanism and the PCB appearance inspection machine of the utility model can prevent the glass pressing plate from shifting and can avoid the glass pressing plate from crushing the PCB.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a transport mechanism and a corresponding PCB appearance detection machine. Background Art

[0002] The PCB appearance inspection machine is mainly used to inspect whether the appearance of the holes on the PCB meets the design standards. The PCB appearance inspection machine needs to go through a series of actions such as PCB loading, placing the glass pressing plate, PCB scanning, PCB inspection, taking the glass pressing plate and PCB unloading. In the existing carrier mechanism and PCB appearance inspection machine, when the glass pressing plate is placed on the PCB on the carrier mechanism, the glass pressing plate is prone to shifting, and when the glass pressing plate is placed, the glass pressing plate is easy to crush the PCB due to its heavy weight.

[0003] Therefore, it is necessary to provide a transport mechanism and a corresponding PCB appearance inspection machine to solve the above technical problems. Utility Model Content

[0004] The utility model provides a transport mechanism and a corresponding PCB appearance inspection machine, which can prevent a glass pressing plate from shifting and can avoid the glass pressing plate from damaging a PCB.

[0005] The technical solution of the utility model is:

[0006] A transport mechanism, comprising:

[0007] A carrying platform is arranged to slide in a transverse direction, a through groove is arranged on the carrying platform, and a plurality of positioning holes are arranged on both longitudinal sides of the carrying platform, and the plurality of positioning holes on each side are arranged at intervals in the transverse direction;

[0008] A glass table, which is connected to the carrying platform and covers the through slot and is used to carry the PCB; and

[0009] A plurality of vacuum adsorption components are divided into two groups and arranged on both sides of the carrying platform in the longitudinal direction, each group includes a plurality of the vacuum adsorption components, and the plurality of vacuum adsorption components in each group are arranged at intervals in the transverse direction; the vacuum adsorption components include a positioning sleeve, a joint, a suction rod and a compression spring; the positioning sleeve is arranged in the positioning hole, and a protruding limiting edge is provided at the top end of the positioning sleeve, and the limiting edge abuts against the top surface of the carrying platform; both ends of the suction rod pass through, and it includes a main body and a convex part, the main body is movably arranged in the positioning sleeve along the vertical direction, the convex part is connected to the top end of the main body, and a suction hole is provided in the center of the convex part for adsorbing the glass pressure plate; the joint is connected to the bottom end of the main body, and the compression spring is sleeved on the main body, and its two ends abut against the convex part and the positioning sleeve respectively, and the compression spring is used to provide elastic force so that the convex part has a tendency to move upward.

[0010] In the transport mechanism described in the utility model, the vacuum adsorption assembly further comprises a rubber gasket, which is arranged on the inner side of the adsorption hole, and the rubber gasket protrudes from the top surface of the convex part.

[0011] In the transport mechanism of the utility model, the bottom end of the positioning sleeve is in a frustum shape.

[0012] In the transport mechanism described in the utility model, the transport mechanism also includes two lifting components, which are arranged on both longitudinal sides of the transport platform, and the lifting components include a lift rod and a lift drive component; the lift rod is movably arranged vertically in the transport platform, and the lift drive component is connected to the lift rod and is used to drive the lift rod to move vertically to lift the glass pressure plate so that the glass pressure plate is clearance-matched with the transport platform.

[0013] Another technical solution of the utility model is:

[0014] A PCB appearance inspection machine, comprising:

[0015] A base, whose two lateral ends are respectively a first end and a second end;

[0016] The above-mentioned carrying mechanism, the carrying platform is connected to the base in a lateral sliding manner, and the carrying platform includes upper and lower material positions, an inspection position, a scanning position, and upper and lower plate positions arranged in sequence in its sliding direction. When the carrying platform is located at the upper and lower material positions and the upper and lower plate positions, the carrying platform is located at the first end and the second end respectively;

[0017] The upper and lower plate mechanism comprises a glass pressing plate, an upper and lower plate assembly and an upper and lower plate Z-direction driving assembly; the upper and lower plate assembly is movably arranged at the upper and lower plate position in the vertical direction, and is used to press the glass pressing plate on the PCB board or remove it from the PCB board; the upper and lower plate Z-direction driving assembly is connected to the base and the upper and lower plate assembly, and is used to drive the upper and lower plate assembly to move vertically;

[0018] The scanning mechanism comprises a bottom light source, a scanning camera and a scanning driving component; the scanning camera is movably arranged at the scanning position along the longitudinal direction and the vertical direction; the scanning driving component is connected to the base and the scanning camera, and is used to drive the scanning camera to move along the longitudinal direction and the vertical direction; the bottom light source is a bar, which is connected to the base, arranged along the longitudinal direction, and is located directly below the scanning camera. When the carrying platform is located at the scanning position, the bottom light source is located below the glass table; and,

[0019] The maintenance mechanism comprises a maintenance camera and a maintenance drive assembly; the maintenance camera is movably arranged at the maintenance position along the longitudinal and vertical directions; the maintenance drive assembly is connected to the base and the maintenance camera, and is used to drive the maintenance camera to move longitudinally and vertically.

[0020] In the PCB appearance inspection machine described in the utility model, the scanning mechanism also includes a scanning connection frame, which is located on a side of the inspection mechanism close to the second end, and the scanning connection frame includes two scanning columns, a scanning top plate and a connecting beam; the two scanning columns are connected to the base, and are arranged in the longitudinal direction and are spaced apart; the scanning top plate and the connecting beam are both connected between the two scanning columns, and the scanning top plate is located above the connecting beam;

[0021] The scanning drive assembly includes a scanning Y-direction moving module and a scanning Z-direction moving module; the scanning Z-direction moving module is connected to the scanning camera and is used to drive the scanning camera to move vertically; the scanning Y-direction moving module is a linear motor, which is connected to the side of the scanning top plate facing the inspection mechanism, and the moving slider of the scanning Y-direction moving module is connected to the scanning Z-direction moving module, which is used to drive the scanning Z-direction moving module and the scanning camera to move longitudinally; the scanning camera is located on the side of the scanning connecting frame facing the inspection mechanism;

[0022] The upper and lower plate Z-direction driving assembly is connected to a side of the connecting beam facing away from the maintenance mechanism.

[0023] In the PCB appearance inspection machine described in the utility model, the upper and lower plate components include a longitudinal plate and two clamping components; the longitudinal plate is connected to the upper and lower plate Z-direction driving components and is arranged in the longitudinal direction; the clamping component includes a transverse plate and two clamping structures; the transverse plate is arranged in the transverse direction and is located below the connecting beam, and the middle parts of the transverse plates of the two clamping components are respectively connected to the two ends of the longitudinal plate; in each of the clamping components, one of the clamping structures is located on the side of the scanning connecting frame close to the second end, and the other clamping structure is located directly below the scanning top plate; the clamping structure includes a clamping cylinder and a bearing plate, and in each of the clamping components, the clamping cylinders of the two clamping structures are respectively connected to the upper surfaces of the two ends of the transverse plate, and the clamping cylinders are connected to the bearing plate for driving the bearing plate to move in the longitudinal direction, and the bearing plates of the two clamping components cooperate to clamp the two longitudinal sides of the glass pressing plate, and the bottom end of the bearing plate is an L-shape bent inward.

[0024] In the PCB appearance inspection machine described in the utility model, the PCB appearance inspection machine also includes two whole plate mechanisms, which are disposed on the lateral sides of the scanning connecting frame, and the two clamping assemblies are located between the two whole plate mechanisms; the whole plate mechanism includes a connecting plate and two whole plate assemblies, the connecting plate is arranged in the longitudinal direction, and both ends of the connecting plate are connected to the base, the whole plate assembly includes a whole plate cylinder and a whole plate block, the whole plate cylinder is connected to the top of the connecting plate and to the whole plate block, and is used to drive the whole plate block to move in the lateral direction, and the whole plate block extends downward to the bottom of the connecting plate, and when the glass pressing plate is lifted to a high position, the whole plate blocks of the two groups of the whole plate mechanisms are used to limit the lateral sides of the glass pressing plate.

[0025] In the PCB appearance inspection machine described in the utility model, the upper and lower plate components also include four limit plates, two of which are connected to the two ends of the connecting plates of one group of the whole plate mechanism, and the other two are connected to the two ends of the connecting plates of another group of the whole plate mechanism, the limit plates extend laterally and protrude from the connecting plates, and the four limit plates are respectively located on the inner sides of the four supporting plates, and are used to limit the longitudinal movement of the four supporting plates.

[0026] In the PCB appearance inspection machine described in the utility model, the inspection mechanism also includes an inspection connection frame, the inspection connection frame is close to the first end relative to the scanning connection frame, the inspection camera is located on the side of the inspection connection frame close to the first end, and the inspection connection frame includes two inspection columns and an inspection top plate; the two inspection columns are connected to the base, arranged longitudinally, and arranged at intervals; the inspection top plate is connected between the two inspection columns; the inspection drive assembly includes an inspection Y-direction moving module and an inspection Z-direction moving module Moving module; the maintenance Z-direction moving module is connected to the maintenance camera, and is used to drive the maintenance camera to move vertically; the maintenance Y-direction moving module is a linear motor, which is arranged along the longitudinal direction and connected to the side of the maintenance top plate facing the first end, and the moving slider of the maintenance Y-direction moving module is connected to the maintenance Z-direction moving module, and is used to drive the maintenance Z-direction moving module and the maintenance camera to move longitudinally; when the carrying platform is located at the upper and lower material positions, the maintenance camera is located at the edge of the carrying platform.

[0027] Compared with the prior art, the utility model has the following beneficial effects: the carrying mechanism and PCB appearance inspection machine of the utility model, the carrying platform of which is firstly in the upper and lower material positions, the PCB is placed on the glass table, and then the carrying platform moves horizontally to the upper and lower plate positions, the upper and lower plate Z-direction driving components drive the upper and lower plate components located in the high position to move downward, and the glass pressing plate is placed on the PCB, and the upper and lower plate components return to the high position again, and then the carrying platform moves to the scanning position, the bottom light source is irradiated to the PCB, and after the scanning camera is adjusted to a suitable position vertically, the PCB is scanned longitudinally, after the scanning of the entire PCB is completed, the carrying platform moves to the inspection position, and after the inspection camera is adjusted to a suitable position vertically, the PCB is inspected longitudinally, after the inspection of the PCB is completed, the carrying platform returns to the upper and lower plate positions again, the upper and lower plate components move downward to remove the glass pressing plate from the PCB, and then rise, and finally the carrying platform returns to the upper and lower material positions again, and the PCB that has been inspected can be unloaded.

[0028] The carrying mechanism and PCB appearance inspection machine of the utility model can place the glass pressing plate on the convex part of the suction rod, and the glass pressing plate is sucked by the suction rod to prevent the glass pressing plate from shifting. When the glass pressing plate is not placed on the suction rod, the elastic force of the compression spring pushes the suction rod upward. When the glass pressing plate is placed on the suction rod, the glass pressing plate presses the suction rod downward, and the compression spring makes the glass pressing plate slowly move downward and elastically press on the PCB, so as to avoid the glass pressing plate colliding with the PCB and causing damage to the PCB; at the same time, it is convenient for the L-shaped carrying plate to be moved out from under the glass pressing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0030] Figure 1 This is a schematic diagram of the overall structure of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0031] Figure 2 A schematic structural diagram of the upper and lower plate mechanisms, scanning mechanism and whole board mechanism of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0032] Figure 3 A structural schematic diagram from another angle of the upper and lower plate mechanisms, scanning mechanisms and whole board mechanisms of the PCB appearance inspection machine provided in the preferred embodiment of the utility model.

[0033] Figure 4 A schematic diagram of the top view of the upper and lower plate mechanisms and the whole board mechanism of the PCB appearance inspection machine provided in the preferred embodiment of the utility model.

[0034] Figure 5A schematic structural diagram of a clamping assembly of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0035] Figure 6 A schematic structural diagram of the whole board mechanism of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0036] Figure 7 A schematic structural diagram of a maintenance mechanism of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0037] Figure 8 A schematic structural diagram of a base and a carrying mechanism of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0038] Fig. 9 A schematic structural diagram of a base of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0039] Fig.10 A schematic structural diagram of a transport mechanism of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0040] Fig.11 A schematic structural diagram of a carrying platform of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0041] Fig.12 A schematic structural diagram of a vacuum adsorption assembly of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0042] Fig.13 A schematic structural diagram of a lifting assembly of a PCB appearance inspection machine provided in a preferred embodiment of the utility model.

[0043] in,

[0044] 1. base, 11. first end, 12. second end, 13. groove,

[0045] 2. Carrying mechanism,

[0046] 21. Carrying platform, 211. Groove, 212. Positioning hole,

[0047] 22. Glass table top,

[0048] 23. Vacuum adsorption assembly, 231. Positioning sleeve, 2311. Limiting edge, 232. Joint, 233. Suction rod, 2331. Main body, 2332. Protrusion, 234. Compression spring, 235. Rubber gasket,

[0049] 24. Lifting assembly, 241. Lifting rod, 242. Lifting drive assembly,

[0050] 25. Linear slides,

[0051] 26. Drag chain,

[0052] 3. Upper and lower plate mechanism,

[0053] 31. Glass platen,

[0054] 32. Upper and lower plate assembly, 321. longitudinal plate, 322. clamping assembly, 3221. transverse plate, 3222. clamping structure, 32221. clamping cylinder, 32222. bearing plate,

[0055] 33. Z-direction drive assembly of upper and lower plates,

[0056] 34. Limiting piece,

[0057] 4. Scanning mechanism,

[0058] 41. Bottom light source,

[0059] 42. Scanning camera,

[0060] 43. Scanning drive assembly, 431. Scanning Y-direction moving module, 432. Scanning Z-direction moving module,

[0061] 44. Scanning connecting frame, 441. Scanning column, 442. Scanning top plate, 443. Connecting beam,

[0062] 5. Maintenance organization,

[0063] 51. Repair the camera.

[0064] 52. Repair the drive assembly, 521. Repair the Y-axis moving module, 522. Repair the Z-axis moving module, 53. Repair the connecting frame, 531. Repair the column, 532. Repair the top plate,

[0065] 6. whole plate mechanism, 61. connecting plate, 62. whole plate assembly, 621. whole plate cylinder, 622. whole plate.

[0066] In the figures, structurally similar elements are denoted by the same reference numerals. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0068] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0069] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] The PCB appearance inspection machine in the prior art has a straight-line process and performs various actions in the same direction, which results in a bulky structure of the PCB appearance inspection machine and occupies a large space.

[0072] The following is a preferred embodiment of a PCB appearance inspection machine and a PCB appearance inspection method provided by the utility model that can solve the above technical problems.

[0073] Please refer to Figure 1 and Fig.11 The preferred embodiment of the utility model provides a PCB appearance inspection machine, which includes a base 1, a carrying mechanism 2, an upper and lower plate mechanism 3, a scanning mechanism 4 and an inspection mechanism 5. The two lateral ends of the base 1 are respectively a first end 11 and a second end 12. The carrying mechanism 2 includes a carrying platform 21 and a glass table 22. The carrying platform 21 is connected to the base 1 in a lateral sliding manner, and a through slot 211 is provided on the carrying platform 21. The carrying platform 21 includes upper and lower material positions, an inspection position, a scanning position and upper and lower plate positions arranged in sequence in its sliding direction. When the carrying platform 21 is located at the upper and lower material positions and the upper and lower plate positions, the carrying platform 21 is located at the first end 11 and the second end 12 respectively. The glass table 22 is connected to the carrying platform 21 and covers the through slot 211, and is used to carry the PCB.

[0074] Please refer to Figure 2 and Figure 3The upper and lower plate mechanism 3 includes a glass pressing plate 31, an upper and lower plate assembly 32 and an upper and lower plate Z-direction driving assembly 33. The upper and lower plate assembly 32 is movably arranged at the upper and lower plate position along the vertical direction, and is used to press the glass pressing plate 31 on the PCB board or remove it from the PCB board. The upper and lower plate Z-direction driving assembly 33 is connected to the base 1 and the upper and lower plate assembly 32, and is used to drive the upper and lower plate assembly 32 to move vertically.

[0075] Please refer to Figure 1 and Fig. 9 The scanning mechanism 4 includes a bottom light source 41, a scanning camera 42 and a scanning drive assembly 43. The scanning camera 42 is movably arranged at the scanning position along the longitudinal and vertical directions. The scanning drive assembly 43 is connected to the base 1 and the scanning camera 42, and is used to drive the scanning camera 42 to move along the longitudinal and vertical directions. The bottom light source 41 is a bar, which is connected to the base 1, arranged along the longitudinal direction, and is located directly below the scanning camera 42. When the carrying platform 21 is located at the scanning position, the bottom light source 41 is located below the glass table 22. The bottom light source 41 can shine through the glass table 22 to the hole of the PCB, so that the scanning camera 42 can take clearer pictures.

[0076] Please refer to Figure 1 The inspection mechanism 5 includes an inspection camera 51 and an inspection drive assembly 52. ​​The inspection camera 51 is arranged at the inspection position along the longitudinal and vertical directions. The inspection drive assembly 52 is connected to the base 1 and the inspection camera 51, and is used to drive the inspection camera 51 to move longitudinally and vertically.

[0077] Please refer to Fig.10 , Fig.11 and Fig.12, a plurality of positioning holes 212 are provided on both longitudinal sides of the carrying platform 21, and the plurality of positioning holes 212 on each side are arranged at intervals in the transverse direction. The carrying mechanism 2 also includes a plurality of vacuum adsorption components 23, which are arranged on both longitudinal sides of the carrying platform 21 in two groups, each group includes a plurality of vacuum adsorption components 23, and the plurality of vacuum adsorption components 23 in each group are arranged at intervals in the transverse direction. The vacuum adsorption component 23 includes a positioning sleeve 231, a joint 232, a suction rod 233 and a compression spring 234. The positioning sleeve 231 is provided in the positioning hole 212, and a protruding limiting edge 2311 is provided at the top end of the positioning sleeve 231, and the limiting edge 2311 abuts against the top surface of the carrying platform 21, so as to facilitate the positioning sleeve 231 to be placed at a designated position in the positioning hole 212. The suction rod 233 has two ends that penetrate, and includes a main body 2331 and a convex part 2332. The main body 2331 is vertically movable and penetrates the positioning sleeve 231. The convex part 2332 is connected to the top of the main body 2331. The center of the convex part 2332 is provided with an adsorption hole for adsorbing the glass pressing plate 31. The joint 232 is connected to the bottom end of the main body 2331. The compression spring 234 is sleeved on the main body 2331. The two ends thereof are respectively in contact with the convex part 2332 and the positioning sleeve 231. The compression spring 234 is used to provide elastic force so that the convex part 2332 has a tendency to move upward.

[0078] The carrying mechanism 2 and the PCB appearance inspection machine of the utility model, the carrying platform 21 is firstly in the upper and lower material positions, the PCB is placed on the glass table 22, and then the carrying platform 21 moves horizontally to the upper and lower plate positions, the upper and lower plate Z-direction driving assembly 33 drives the upper and lower plate assembly 32 located in the high position to move downward, and the glass pressing plate 31 is placed on the PCB, and the upper and lower plate assembly 32 returns to the high position again, and then the carrying platform 21 moves to the scanning position, the bottom light source 41 shines on the PCB, and the scanning camera 42 is adjusted to a suitable position along the vertical direction, and the PCB is scanned along the longitudinal direction. After the scanning of the entire PCB is completed, the carrying platform 21 moves to the inspection position, and the inspection camera 51 is adjusted to a suitable position along the vertical direction, and the PCB is inspected along the longitudinal direction. After the inspection of the PCB is completed, the carrying platform 21 returns to the upper and lower plate positions again, the upper and lower plate assembly 32 moves downward to remove the glass pressing plate 31 from the PCB, and then rises, and finally the carrying platform 21 returns to the upper and lower material positions again, and the PCB that has been inspected can be unloaded.

[0079] The carrying mechanism 2 and the PCB appearance inspection machine of the utility model can place the glass pressing plate 31 on the convex part 2332 of the suction rod 233, and the glass pressing plate 31 is sucked by the suction rod 233 to prevent the glass pressing plate 31 from shifting. When the glass pressing plate 31 is not placed on the suction rod 233, the elastic force of the compression spring 234 pushes the suction rod 233 upward. When the glass pressing plate 31 is placed on the suction rod 233, the glass pressing plate 31 presses the suction rod 233 downward, and the compression spring 234 makes the glass pressing plate 31 slowly move downward and elastically press on the PCB, so as to prevent the glass pressing plate 31 from colliding with the PCB and causing damage to the PCB; at the same time, it is convenient for the L-shaped carrying plate 32222 to be moved out from under the glass pressing plate 31.

[0080] The PCB appearance inspection machine of the utility model is provided with a carrier platform 21 slidingly disposed on a base 1 in a transverse direction, and the upper and lower plate mechanisms 3, the scanning mechanism 4 and the inspection mechanism 5 are all arranged in a transverse direction on the base 1, so that the carrier platform 21 can carry the PCB to reciprocate, and complete a series of actions such as PCB loading, placing the glass pressing plate 31, PCB scanning, PCB inspection, taking out the glass pressing plate 31 and PCB unloading, wherein PCB loading and PCB unloading are at the same position, and placing the glass pressing plate 31 and taking out the glass pressing plate 31 are at the same position, so that the size of the base 1 in the transverse direction is relatively small, and the occupied space is saved.

[0081] A rubber gasket 235 is disposed inside the adsorption hole. The rubber gasket 235 protrudes from the top surface of the protrusion 2332 and is used to contact and tightly connect with the glass pressing plate 31 to enhance the vacuum adsorption force.

[0082] The bottom end of the positioning sleeve 231 is in a frustum shape, which has a guiding function and facilitates the positioning sleeve 231 to be placed into the positioning hole 212 .

[0083] Please refer to Fig.10 and Fig.13 The transport mechanism 2 further includes two lifting assemblies 24, which are disposed on both sides of the transport platform 21 in the longitudinal direction. The lifting assemblies 24 include a lift rod 241 and a lift drive assembly 242. The lift rod 241 is vertically movable and penetrates the transport platform 21. The lift drive assembly 242 is connected to the lift rod 241 and is used to drive the lift rod 241 to move vertically to lift the glass platen 31 so that the glass platen 31 and the transport platform 21 have a clearance fit. In the above structure, the lift drive assembly 242 lifts the lift rod 241 to lift the glass platen 31, thereby creating a gap between the glass platen 31 and the transport platform 21, so that the bottom of the four carrier plates 32222 can extend under the glass platen 31 to lift it. When the push rod 241 pushes the glass pressing plate 31, the vacuum adsorption assembly 23 maintains the adsorption state, so that the suction rod 233 is fixedly connected to the glass pressing plate 31. Combined with the vertical guiding function of the main body 2331 and the positioning sleeve 231, only two lifting assemblies 24 are needed to smoothly lift the glass pressing plate 31.

[0084] Please refer to Figure 2 and Figure 3 The scanning mechanism 4 further includes a scanning connection frame 44, which is located on one side of the inspection mechanism 5 close to the second end 12. The scanning connection frame 44 includes two scanning columns 441, a scanning top plate 442 and a connecting beam 443. The two scanning columns 441 are connected to the base 1, and are arranged in the longitudinal direction and are spaced apart. The scanning top plate 442 and the connecting beam 443 are both connected between the two scanning columns 441, and the scanning top plate 442 is located above the connecting beam 443.

[0085] Please refer to Figure 1 and Figure 2 The scanning drive assembly 43 includes a scanning Y-direction moving module 431 and a scanning Z-direction moving module 432. The scanning Z-direction moving module 432 is connected to the scanning camera 42, and is used to drive the scanning camera 42 to move vertically. The scanning Y-direction moving module 431 is a linear motor, which is connected to the side of the scanning top plate 442 facing the maintenance mechanism 5, and the moving slider of the scanning Y-direction moving module 431 is connected to the scanning Z-direction moving module 432, and is used to drive the scanning Z-direction moving module 432 and the scanning camera 42 to move longitudinally. The scanning camera 42 is located on the side of the scanning connecting frame 44 facing the maintenance mechanism 5. The upper and lower plate Z-direction driving assembly 33 is connected to the side of the connecting beam 443 facing away from the maintenance mechanism 5.

[0086] In the above structure, the scanning drive assembly 43 is arranged on the scanning top plate 442, the upper and lower plate Z-direction driving assembly 33 is arranged on the connecting beam 443, and the two scanning columns 441 support the scanning top plate 442 and the connecting beam 443 to a higher position, thereby supporting the scanning drive assembly 43 and the upper and lower plate Z-direction driving assembly 33 to a higher position, so as to facilitate the carrier platform 21 to pass under the two, and the two scanning columns 441 are respectively located at the longitudinal sides of the carrier platform 21, and will not interfere with the movement of the carrier platform 21. The upper and lower plate assembly 32 and the scanning camera 42 are both connected to the scanning connecting frame 44, which can make the structure of the entire PCB appearance inspection machine compact. The scanning camera 42 is located on the side of the scanning connecting frame 44 facing the inspection mechanism 5, and the upper and lower plate Z-direction driving assembly 33 is connected to the side of the connecting beam 443 facing away from the inspection mechanism 5, so that the vertical movement of the scanning camera 42 is not interfered by the upper and lower plate Z-direction driving assembly 33.

[0087] Please refer to Figure 3 , Figure 4 and Figure 5, the upper and lower plate assembly 32 includes a longitudinal plate 321 and two clamping assemblies 322. The longitudinal plate 321 is connected to the upper and lower plate Z-direction driving assembly 33 and is arranged in the longitudinal direction. The clamping assembly 322 includes a transverse plate 3221 and two clamping structures 3222. The transverse plate 3221 is arranged in the transverse direction and is located below the connecting beam 443. The middle parts of the transverse plates 3221 of the two clamping assemblies 322 are respectively connected to the two ends of the longitudinal plate 321. In each clamping assembly 322, one of the clamping structures 3222 is located on the side of the scanning connecting frame 44 close to the second end 12, and the other clamping structure 3222 is located directly below the scanning top plate 442. The clamping structure 3222 includes a clamping cylinder 32221 and a bearing plate 32222. In each clamping assembly 322, the clamping cylinders 32221 of the two clamping structures 3222 are respectively connected to the upper surfaces of both ends of the horizontal plate 3221. The clamping cylinders 32221 are connected to the bearing plate 32222 to drive the bearing plate 32222 to move longitudinally. The bearing plates 32222 of the two clamping assemblies 322 cooperate to clamp the two longitudinal sides of the glass pressing plate 31. The bottom end of the bearing plate 32222 is an L-shape bent inward. In the above structure, the clamping cylinder 32221 is connected to the upper surface of the horizontal plate 3221, so that the clamping cylinder 32221 is fixed and stable, and will not touch the glass pressing plate 31. By using the L-shaped supporting plate 32222, the bottom end of the supporting plate 32222 can be extended to the bottom of the horizontal plate 3221 and the glass pressing plate 31, so as to facilitate the clamping and lifting of the glass pressing plate 31, and to position the entire glass pressing plate 31 in the longitudinal direction. The four clamping cylinders 32221 respectively drive the four supporting plates 32222 to move inward, and the two sides of the longitudinal direction of the glass pressing plate 31 can be clamped by the L-shaped bottom ends of the four supporting plates 32222. The four clamping cylinders 32221 respectively drive the four supporting plates 32222 to move outward, so that the four supporting plates 32222 can release the glass pressing plate 31. Through the above structure, the glass pressing plate 31 can be lifted or lowered flexibly, and the process is stable.

[0088] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 6The PCB appearance inspection machine also includes two whole-board mechanisms 6, which are disposed on both lateral sides of the scanning connection frame 44, and the two clamping assemblies 322 are located between the two whole-board mechanisms 6. The whole-board mechanism 6 includes a connecting plate 61 and two whole-board assemblies 62. The connecting plate 61 is arranged in the longitudinal direction, and both ends thereof are connected to the base 1. The whole-board assembly 62 includes a whole-board cylinder 621 and a whole-board plate 622. The whole-board cylinder 621 is connected to the top of the connecting plate 61 and to the whole-board plate 622, and is used to drive the whole-board plate 622 to move in the lateral direction. The whole-board plate 622 extends downward to the bottom of the connecting plate 61. When the glass pressing plate 31 is lifted to a high position, the whole-board plates 622 of the two sets of whole-board mechanisms 6 are used to limit the lateral sides of the glass pressing plate 31. When the four bearing plates 32222 lift the glass pressing plate 31, the four whole plate cylinders 621 drive the four whole plate blocks 622 to move inwards and close to each other, adjust the horizontal position of the glass pressing plate 31, and adjust the vertical position of the glass pressing plate 31 in combination with the two clamping assemblies 322, so that the position of the glass pressing plate 31 pressed on the PCB is accurate. The two clamping assemblies 322 are located between the two whole plate mechanisms 6, so that the movement of the two clamping assemblies 322 is not interfered by the two whole plate mechanisms 6. The whole plate cylinder 621 is connected to the top of the connecting plate 61, so that the whole plate cylinder 621 is fixed and stable.

[0089] Please refer to Figure 3 and Figure 6 The upper and lower plate assembly 32 further includes four limiting pieces 34, two of which are connected to the two ends of the connecting plate 61 of one set of the whole plate mechanism 6, and the other two limiting pieces 34 are connected to the two ends of the connecting plate 61 of the other set of the whole plate mechanism 6. The limiting pieces 34 extend in the transverse direction and protrude from the connecting plate 61. The four limiting pieces 34 are respectively located at the inner sides of the four bearing plates 32222, and are used to limit the longitudinal movement of the four bearing plates 32222. When the four bearing plates 32222 move inward, the four limiting pieces 34 can respectively limit the longitudinal movement of the four bearing plates 32222, so that the position of the glass pressing plate 31 pressed on the PCB is accurate.

[0090] Please refer to Figure 7The maintenance mechanism 5 also includes a maintenance connecting frame 53, and the maintenance connecting frame 53 is close to the first end 11 relative to the scanning connecting frame 44. The maintenance camera 51 is located on the side of the maintenance connecting frame 53 close to the first end 11, and the maintenance connecting frame 53 includes two maintenance columns 531 and a maintenance top plate 532. The two maintenance columns 531 are connected to the base 1, and are arranged longitudinally and spaced apart. The maintenance top plate 532 is connected between the two maintenance columns 531. The maintenance drive assembly 52 includes a maintenance Y-direction moving module 521 and a maintenance Z-direction moving module 522. The maintenance Z-direction moving module 522 is connected to the maintenance camera 51, and is used to drive the maintenance camera 51 to move vertically. The maintenance Y-direction moving module 521 is a linear motor, which is arranged in the longitudinal direction and connected to the side of the maintenance top plate 532 facing the first end 11. The movable slider of the maintenance Y-direction moving module 521 is connected to the maintenance Z-direction moving module 522, and is used to drive the maintenance Z-direction moving module 522 and the maintenance camera 51 to move in the longitudinal direction. When the carrying platform 21 is located at the upper and lower material positions, the maintenance camera 51 is located at the edge of the carrying platform 21.

[0091] In the above structure, the maintenance drive assembly 52 is connected to the maintenance top plate 532, and the two maintenance columns 531 support the maintenance top plate 532 to a higher position, thereby supporting the maintenance drive assembly 52 to a higher position. When the carrying platform 21 moves in the horizontal direction, the maintenance drive assembly 52 will not interfere with the movement of the carrying platform 21, and the two maintenance columns 531 are located on both sides of the longitudinal direction of the carrying platform 21, and will not interfere with the movement of the carrying platform 21. The maintenance camera 51 is located on the side of the maintenance connection frame 53 close to the first end 11, so that the movement of the maintenance camera 51 and the scanning camera 42 does not interfere with each other, so that the scanning mechanism 4 and the maintenance mechanism 5 are closer, so that the structure of the PCB appearance inspection machine is more compact. When the carrying platform 21 is located at the upper and lower material positions, the maintenance camera 51 is located at the edge of the carrying platform 21, so that the maintenance camera 51 is closer to the upper and lower material positions, and the maintenance camera 51 does not interfere with the loading and unloading of the PCB, so that the structure of the PCB appearance inspection machine is more compact.

[0092] Please refer to Figure 8 and Fig. 9The base 1 is provided with a groove 13 extending in the transverse direction, the bottom light source 41 is arranged in the groove 13, the vertical projections of the through groove 211 and the vacuum adsorption assembly 23 on the base 1 are located in the groove 13, the joint 232 extends into the groove 13, and the jacking drive assembly 242 is located in the groove 13. The transport mechanism 2 also includes a plurality of linear slides 25 and two drag chains 26, the linear slides 25 are arranged in the transverse direction, and the plurality of linear slides 25 are arranged in two groups on the longitudinal sides outside the groove 13, the linear slides 25 connect the transport platform 21 and the base 1, the drag chains 26 are arranged in the transverse direction, and the two drag chains 26 are arranged on the longitudinal sides inside the groove 13, and the bottom light source 41 is located between the two drag chains 26. In the above structure, the bottom light source 41 is arranged in the groove 13, which can reduce the vertical height of the PCB appearance inspection machine and make the structure compact. The vertical projection of the through groove 211 on the base 1 is located in the groove 13, so that the PCB located at the through groove 211 can be irradiated by the bottom light source 41. The connector 232 extends into the groove 13, which facilitates the connector 232 to connect to the vacuum pump, so that the pipe connected to the vacuum pump moves smoothly. The jacking drive assembly 242 is located in the groove 13, and the two drag chains 26 are located in the groove 13, which can effectively save vertical space and make the structure compact. The drag chain 26 can be provided with a vacuum adsorption tube, an electrical connection line of the jacking drive assembly 242, and other structures.

[0093] The base 1 is made of marble and has good stability. The groove 13 runs through both ends of the base 1 horizontally, which is convenient for processing and forming.

[0094] The preferred embodiment of the utility model further provides a PCB appearance detection method, using the above-mentioned PCB appearance detection machine to detect the PCB, the PCB appearance detection method comprises:

[0095] S11, sliding the carrying platform to the upper and lower material positions, and placing the PCB on the glass table;

[0096] In this step, when the PCB appearance inspection machine is in the initial state, the carrying platform 21 is located at the upper and lower material positions, and the PCB is placed on the glass table 22 manually or by a robot; at this time, the elastic force of the compression spring 234 makes the suction rod 233 in a higher position;

[0097] S12, slide the carrying platform 21 to the upper and lower plate positions, and place the glass pressing plate 31 on the PCB through the upper and lower plate assemblies 32;

[0098] In this step, the carrying platform 21 moves horizontally to the upper and lower plate positions. At this time, the vacuum adsorption assembly 23 is in an adsorption state, and the four supporting plates 32222 are in a high position and lift the longitudinal sides of the glass pressing plate 31. The longitudinal movement of the four supporting plates 32222 is limited by four limiting pieces 34 respectively to adjust the longitudinal position of the glass pressing plate 31. The four whole plates 622 move inwardly toward each other horizontally to adjust the lateral position of the glass pressing plate 31. After the adjustment is completed, the four whole plates 622 move outwardly away from each other to stay away from the glass pressing plate 31. The upper and lower plate Z-direction driving assembly 33 drives the four supporting plates 32222 to move downward to place the glass pressing plate 31 on the vacuum adsorption assembly 23. When the glass pressing plate 31 contacts the top of the vacuum adsorption assembly 23, the suction rod 233 sucks the glass pressing plate 31, and the compression spring 234 provides elastic force, so that the glass pressing plate 31 slows down and moves downward, and the four supporting plates 32222 continue to move downward, and their downward movement speed is greater than the downward movement speed of the glass pressing plate 31, so that the bottom of the supporting plate 32222 is separated from the lower surface of the glass pressing plate 31, and then the four supporting plates 32222 move outward away from each other; when the bottom of the supporting plate 32222 moves out from under the glass pressing plate 31, the upper and lower plate Z-direction driving assembly 33 drives the supporting plate 32222 to move upward back to a high position, and the glass pressing plate 31 continues to move downward until it is elastically pressed on the PCB;

[0099] S13, slide the carrying platform 21 to the scanning position, and scan the PCB through the scanning camera 42;

[0100] In this step, the carrying platform 21 moves to the scanning position, and the light from the bottom light source 41 shines on the PCB through the glass table 22 and passes through the hole of the PCB to illuminate the shape and appearance characteristics of the hole. After the scanning camera 42 is adjusted to a suitable position in the vertical direction, the scanning camera 42 moves in the longitudinal direction and the carrying platform 21 moves in the transverse direction to scan the entire surface of the PCB;

[0101] S14, slide the carrying platform 21 to the maintenance position, and inspect the PCB through the maintenance camera 51;

[0102] In this step, the carrying platform 21 moves to the inspection position, and after the inspection camera 51 is adjusted to a suitable position along the vertical direction, the inspection camera 51 moves longitudinally and the carrying platform 21 moves laterally at the same time, until the inspection camera 51 moves to the top of the hole to be inspected, and the hole to be inspected is inspected;

[0103] S15, slide the carrying platform 21 to the upper and lower plate positions, and remove the glass pressing plate 31 through the upper and lower plate assemblies 32;

[0104] In this step, the carrying platform 21 returns to the upper and lower plate positions again. At this time, the vacuum adsorption assembly 23 maintains the adsorption state, so that the suction rod 233 is fixedly connected to the glass pressing plate 31, and the sliding fit between the suction rod 233 and the positioning sleeve 231 guides the upward movement of the glass pressing plate 31; the lifting drive assembly 242 drives the push rod 241 to rise, and lifts the glass pressing plate 31, so that there is a gap between the glass pressing plate 31 and the carrying platform 21, and the four bearing plates 32222 descend. When the bottom of the bearing plate 32222 is lower than the lower surface of the glass pressing plate 31, the four bearing plates 32222 move inward, and the bottom of the bearing plate 32222 moves to the bottom of the glass pressing plate 31. The vacuum adsorption assembly 23 releases the adsorption force, and the bearing plate 32222 moves up to lift the glass pressing plate 31. When the four bearing plates 32222 move inward, they can be limited by four limit plates 34. After the glass pressing plate 31 is lifted, the push rod 241 descends and returns to the low position;

[0105] S16, slide the carrying platform 21 to the upper and lower material positions, and take away the PCB;

[0106] In this step, the carrying platform 21 returns to the loading and unloading position again, and the PCB that has completed the inspection is unloaded manually or by a robot, and the PCB appearance inspection machine returns to the initial state, waiting to enter the inspection of the next PCB.

[0107] The utility model discloses a PCB appearance inspection machine and a PCB appearance inspection method, wherein the carrying platform is firstly in the upper and lower material positions, the PCB is placed on the glass table, and then the carrying platform moves horizontally to the upper and lower plate positions, the upper and lower plate Z-direction driving components drive the upper and lower plate components located at the high position to move downward, the glass pressing plate is placed on the PCB, the upper and lower plate components return to the high position again, then the carrying platform moves to the scanning position, the bottom light source is irradiated to the PCB, the scanning camera is adjusted to a suitable position along the vertical direction, the PCB is scanned along the longitudinal direction, after the scanning of the entire PCB is completed, the carrying platform moves to the inspection position, the inspection camera is adjusted to a suitable position along the vertical direction, the PCB is inspected along the longitudinal direction, after the inspection of the PCB is completed, the carrying platform returns to the upper and lower plate positions again, the upper and lower plate components move downward to remove the glass pressing plate from the PCB, and then rise, and finally the carrying platform returns to the upper and lower material positions again, and the PCB that has been inspected can be unloaded. The utility model discloses a PCB appearance inspection method for a PCB appearance inspection machine, which sets a carrying platform on a base in a lateral sliding manner, and an upper and lower plate mechanism, a scanning mechanism and an inspection mechanism are arranged on the base in a lateral manner, so that the carrying platform can carry the PCB for reciprocating motion, and complete a series of actions such as PCB loading, placing a glass pressing plate, PCB scanning, PCB inspection, taking out the glass pressing plate and PCB unloading, wherein PCB loading and PCB unloading are at the same position, and placing the glass pressing plate and taking out the glass pressing plate are at the same position, so that the lateral size of the base is relatively small, and the occupied space is saved.

[0108] The carrying mechanism and PCB appearance inspection machine of the utility model can place the glass pressing plate on the convex part of the suction rod, and the glass pressing plate is sucked by the suction rod to prevent the glass pressing plate from shifting. When the glass pressing plate is not placed on the suction rod, the elastic force of the compression spring pushes the suction rod upward. When the glass pressing plate is placed on the suction rod, the glass pressing plate presses the suction rod downward, and the compression spring makes the glass pressing plate slowly move downward and elastically press on the PCB, so as to avoid the glass pressing plate colliding with the PCB and causing damage to the PCB; at the same time, it is convenient for the L-shaped carrying plate to be moved out from under the glass pressing plate.

[0109] To sum up, although the present invention has been disclosed as above in the form of preferred embodiments, the protection scope of the present invention is not limited thereto, and any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the concept of the technical solution of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A transport mechanism, characterized in that: include: A carrying platform is arranged to slide in a transverse direction, a through groove is arranged on the carrying platform, and a plurality of positioning holes are arranged on both longitudinal sides of the carrying platform, and the plurality of positioning holes on each side are arranged at intervals in the transverse direction; A glass table, which is connected to the carrying platform and covers the through slot and is used to carry the PCB; and A plurality of vacuum adsorption components are divided into two groups and arranged on both sides of the carrying platform in the longitudinal direction, each group includes a plurality of the vacuum adsorption components, and the plurality of vacuum adsorption components in each group are arranged at intervals in the transverse direction; the vacuum adsorption components include a positioning sleeve, a joint, a suction rod and a compression spring; the positioning sleeve is arranged in the positioning hole, and a protruding limiting edge is provided at the top end of the positioning sleeve, and the limiting edge abuts against the top surface of the carrying platform; both ends of the suction rod pass through, and it includes a main body and a convex part, the main body is movably arranged in the positioning sleeve along the vertical direction, the convex part is connected to the top end of the main body, and a suction hole is provided in the center of the convex part for adsorbing the glass pressure plate; the joint is connected to the bottom end of the main body, and the compression spring is sleeved on the main body, and its two ends abut against the convex part and the positioning sleeve respectively, and the compression spring is used to provide elastic force so that the convex part has a tendency to move upward.

2. The transport mechanism according to claim 1, characterized in that: The vacuum adsorption assembly further comprises a rubber gasket which is arranged at the inner side of the adsorption hole, and the rubber gasket protrudes from the top surface of the convex part.

3. The carrying mechanism according to claim 1, characterized in that: The bottom end of the positioning sleeve is in a frustum shape.

4. The carrying mechanism according to claim 1, characterized in that: The transport mechanism also includes two lifting assemblies, which are disposed on both longitudinal sides of the transport platform. The lifting assemblies include a lift rod and a lift drive assembly. The lift rod is movably arranged vertically in the transport platform. The lift drive assembly is connected to the lift rod and is used to drive the lift rod to move vertically to lift the glass pressure plate so that the glass pressure plate is clearance-matched with the transport platform.

5. A PCB appearance inspection machine, characterized in that: include: A base, whose two lateral ends are respectively a first end and a second end; The carrying mechanism according to any one of claims 1 to 4, wherein the carrying platform is connected to the base in a transverse sliding manner, and the carrying platform includes upper and lower material positions, an inspection position, a scanning position, and upper and lower plate positions arranged in sequence in its sliding direction, and when the carrying platform is located at the upper and lower material positions and the upper and lower plate positions, the carrying platform is located at the first end and the second end respectively; The upper and lower plate mechanism comprises a glass pressing plate, an upper and lower plate assembly and an upper and lower plate Z-direction driving assembly; the upper and lower plate assembly is movably arranged at the upper and lower plate position in the vertical direction, and is used to press the glass pressing plate on the PCB board or remove it from the PCB board; the upper and lower plate Z-direction driving assembly is connected to the base and the upper and lower plate assembly, and is used to drive the upper and lower plate assembly to move vertically; The scanning mechanism comprises a bottom light source, a scanning camera and a scanning driving component; the scanning camera is movably arranged at the scanning position along the longitudinal direction and the vertical direction; the scanning driving component is connected to the base and the scanning camera, and is used to drive the scanning camera to move along the longitudinal direction and the vertical direction; the bottom light source is a bar, which is connected to the base, arranged along the longitudinal direction, and is located directly below the scanning camera. When the carrying platform is located at the scanning position, the bottom light source is located below the glass table; as well as, An inspection mechanism, which includes an inspection camera and an inspection drive assembly; The inspection camera is movably arranged at the inspection position along the longitudinal and vertical directions; the inspection drive component is connected to the base and the inspection camera, and is used to drive the inspection camera to move longitudinally and vertically.

6. The PCB appearance inspection machine according to claim 5, characterized in that: The scanning mechanism further includes a scanning connection frame, which is located on one side of the inspection mechanism close to the second end, and the scanning connection frame includes two scanning columns, a scanning top plate and a connecting beam; the two scanning columns are connected to the base, and are arranged in the longitudinal direction and are spaced apart; the scanning top plate and the connecting beam are both connected between the two scanning columns, and the scanning top plate is located above the connecting beam; The scanning drive assembly includes a scanning Y-direction moving module and a scanning Z-direction moving module; the scanning Z-direction moving module is connected to the scanning camera and is used to drive the scanning camera to move vertically; the scanning Y-direction moving module is a linear motor, which is connected to the side of the scanning top plate facing the inspection mechanism, and the moving slider of the scanning Y-direction moving module is connected to the scanning Z-direction moving module, which is used to drive the scanning Z-direction moving module and the scanning camera to move longitudinally; the scanning camera is located on the side of the scanning connecting frame facing the inspection mechanism; The upper and lower plate Z-direction driving assembly is connected to a side of the connecting beam facing away from the maintenance mechanism.

7. The PCB appearance inspection machine according to claim 6, characterized in that: The upper and lower plate components include a longitudinal plate and two clamping components; the longitudinal plate is connected to the Z-direction driving components of the upper and lower plates and is arranged in the longitudinal direction; the clamping component includes a transverse plate and two clamping structures; the transverse plate is arranged in the transverse direction and is located below the connecting beam, and the middle parts of the transverse plates of the two clamping components are respectively connected to the two ends of the longitudinal plate; in each of the clamping components, one of the clamping structures is located on the side of the scanning connecting frame close to the second end, and the other clamping structure is located directly below the scanning top plate; the clamping structure includes a clamping cylinder and a bearing plate, and in each of the clamping components, the clamping cylinders of the two clamping structures are respectively connected to the upper surfaces of the two ends of the transverse plate, and the clamping cylinders are connected to the bearing plate for driving the bearing plate to move in the longitudinal direction, and the bearing plates of the two clamping components cooperate to clamp the two sides of the glass pressure plate in the longitudinal direction, and the bottom end of the bearing plate is an L-shape bent inward.

8. The PCB appearance inspection machine according to claim 7, characterized in that: The PCB appearance inspection machine also includes two whole-board mechanisms, which are disposed on both lateral sides of the scanning connecting frame, and the two clamping assemblies are located between the two whole-board mechanisms; the whole-board mechanism includes a connecting plate and two whole-board assemblies, the connecting plate is arranged in the longitudinal direction, and both ends of the connecting plate are connected to the base, the whole-board assembly includes a whole-board cylinder and a whole-board plate, the whole-board cylinder is connected to the top of the connecting plate and to the whole-board plate, and is used to drive the whole-board plate to move in the lateral direction, and the whole-board plate extends downward to the bottom of the connecting plate, and when the glass pressing plate is lifted to a high position, the whole-board plates of the two groups of the whole-board mechanisms are used to limit the lateral sides of the glass pressing plate.

9. The PCB appearance inspection machine according to claim 8, characterized in that: The upper and lower plate assemblies also include four limit plates, two of which are connected to the two ends of the connecting plates of one group of the whole plate mechanism, and the other two are connected to the two ends of the connecting plates of another group of the whole plate mechanism. The limit plates extend laterally and protrude from the connecting plates. The four limit plates are respectively located on the inner sides of the four supporting plates and are used to limit the longitudinal movement of the four supporting plates.

10. The PCB appearance inspection machine according to claim 6, characterized in that: The maintenance mechanism also includes a maintenance connecting frame, which is close to the first end relative to the scanning connecting frame, and the maintenance camera is located on a side of the maintenance connecting frame close to the first end, and the maintenance connecting frame includes two maintenance columns and a maintenance top plate; the two maintenance columns are connected to the base, arranged in the longitudinal direction, and arranged at intervals; the maintenance top plate is connected between the two maintenance columns; the maintenance drive assembly includes a maintenance Y-direction moving module and a maintenance Z-direction moving module; the maintenance Z-direction moving module is connected to the maintenance camera, and is used to drive the maintenance camera to move vertically; the maintenance Y-direction moving module is a linear motor, which is arranged in the longitudinal direction and connected to the side of the maintenance top plate facing the first end, and the moving slider of the maintenance Y-direction moving module is connected to the maintenance Z-direction moving module, and is used to drive the maintenance Z-direction moving module and the maintenance camera to move longitudinally; when the carrying platform is located at the upper and lower material positions, the maintenance camera is located at the edge of the carrying platform.

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