AOI (Automatic Optic Inspection) equipment for conveying and detecting conformal coating of circuit board through board turnover system

Abstract

The invention discloses AOI equipment for conveying and detecting three-proofing paint of a circuit board through a plate turnover system, and relates to the field of AOI equipment, the AOI equipment comprises a base frame, a conveying part is arranged on the base frame, the conveying part is composed of a conveying mechanism and a supporting frame, the conveying mechanism comprises a tooth-shaped belt and a driving assembly, the tooth-shaped belt is installed on the driving assembly in a matched mode, and the supporting frame is arranged on the driving assembly. The driving assembly comprises a first transmission wheel and a second transmission wheel, and the first transmission wheel and the second transmission wheel are rotationally connected to the supporting frame. The plate turnover mechanism is composed of a transmission assembly, a turnover rod piece and a vacuum adsorption piece; a movable limiting mechanism; when the conveying mechanism runs, the transmission shaft is driven by the second transmission wheel to enable the transmission assembly to run, the turnover rod piece is driven by the transmission assembly to rotate intermittently, the turnover rod piece drives the vacuum adsorption piece to complete turnover operation on the circuit board, the configuration number of power sources is reduced by sharing one power source, and the circuit board turnover efficiency is improved. Therefore, the use energy consumption of equipment is reduced, and the processing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field related to AOI equipment, and in particular to AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system. Background Art

[0002] In industrial environments, such as chemical exposure, vibration, high dust levels, salt spray, humidity, and high temperatures, circuit boards can corrode, soften, deform, and mildew, leading to circuit failure. Conformal coating is a specially formulated transparent coating that forms a protective film on the surface of circuit boards that resists moisture, salt spray, and mildew, thereby improving the reliability and safety of the circuit boards and extending their service life.

[0003] Currently, the quality inspection of conformal coating on circuit boards is primarily performed through manual observation under UV light or automated inspection using automated inspection (AOI) equipment. Using AOI equipment to inspect conformal coating on circuit boards saves time and manpower, speeds up production, and has gradually replaced manual inspection. Existing AOI equipment not only includes a conveyor line to transport circuit boards to the inspection area, but also a flip mechanism that flips the boards for double-sided inspection. However, in actual use, these systems still have the following drawbacks: the conveyor line and flip mechanism are powered by independent power sources, which increases energy consumption and leads to higher processing costs. Summary of the Invention

[0004] In order to solve the defects of the prior art, the present invention provides an AOI device that transports and inspects the conformal coating of a circuit board through a flipping system.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention provides an AOI device for conveying and inspecting conformal coating of circuit boards through a flap system, comprising a base frame, a conveying portion provided on the base frame, the conveying portion comprising a conveying mechanism and a support frame, the conveying mechanism comprising a toothed belt and a drive assembly, the toothed belt being cooperatively mounted on the drive assembly, the drive assembly comprising a first transmission wheel and a second transmission wheel, the first transmission wheel and the second transmission wheel being rotatably connected to the support frame; The flip mechanism is composed of a transmission assembly, a flip lever and a vacuum suction member. The transmission assembly includes a transmission shaft, which is mounted on the second transmission wheel. The flip lever drives the vacuum suction member to flip the circuit board. The movable limiting mechanism is used to limit the circuit board.

[0006] As a preferred technical solution of the present invention, the flip rod includes a flip cylinder, a partition plate, a sealing plate, a connecting cylinder and a fixed end cover. The flip cylinder is sleeved on the outside of the connecting cylinder. A number of partition strips are provided between the flip cylinder and the connecting cylinder. The two ends of the partition strips are respectively connected to the partition plate and the sealing plate. The space formed by the flip cylinder, the connecting cylinder, the partition plate and the sealing plate is divided into a number of air cavities by the partition strips. The partition plate is provided with air holes connected to the air cavities, and the flip cylinder is provided with a connecting interface connected to the air cavity. The connecting interface is connected to the vacuum adsorption component through a support tube.

[0007] As a preferred technical solution of the present invention, the fixed end cover includes a fixed cylinder and an annular fixed cover that can rotate with the connecting cylinder. The fixed cylinder is connected to the annular fixed cover, and an annular plate that can rotate with the connecting cylinder is installed in the fixed cylinder. At least two fixing bars are provided on one side of the annular plate, and an installation space for accommodating the insertion of the flip cylinder is formed between the fixing bar and the inner wall of the fixed cylinder. The space formed by the fixed cylinder, the annular plate, the flip cylinder and the connecting cylinder is divided into at least two control chambers connected to the air hole through the fixing bar, and a control tube is provided through the outer wall of the fixed cylinder, and one end of the control tube is connected to the annular plate and connected to the control chamber.

[0008] As a preferred technical solution of the present invention, the transmission assembly also includes a transmission gear, a sector gear meshing with the transmission gear, and a mounting bracket. The transmission gear is sleeved and fixed to the outside of the flip cylinder, the sector gear is sleeved and fixed on the transmission shaft, the mounting bracket is detachably mounted on the support frame, and the transmission shaft and the connecting cylinder are both rotatably connected to the mounting bracket, and the annular fixing cover is detachably mounted on the mounting bracket.

[0009] As a preferred technical solution of the present invention, the drive assembly also includes a drive shaft one, a drive shaft two and a reduction motor, and the drive shaft one and the drive shaft two are both sleeved and fixed with a drive wheel, the drive shaft one is connected to the drive shaft two through a transmission belt, the output end of the reduction motor is connected to the drive shaft one through a belt transmission structure, and two tensioning wheels are provided outside the drive wheel and the drive wheel two, and the drive shaft one, the drive shaft two and the tensioning wheel are all rotatably connected to the support frame.

[0010] As a preferred technical solution of the present invention, the driving wheel, transmission wheel 1 and transmission wheel 2 are all composed of two limiting ring plates and an intermediate gear that can engage with the toothed belt, and the intermediate gear is installed between the two limiting ring plates.

[0011] As a preferred technical solution of the present invention, the movable limiting mechanism includes an L-shaped limiting frame, a transmission bracket and a bidirectional module. The transmission bracket is installed on the movable seat of the bidirectional module, and the L-shaped limiting frame is installed on the transmission bracket.

[0012] As a preferred technical solution of the present invention, it also includes two detection parts arranged above the conveying part, which are used to detect the conformal coating of the circuit board. The detection parts are composed of an adjustment mechanism and a detection component. The detection component is installed at the moving end of the adjustment mechanism. The detection component is composed of a lighting component and a detection camera.

[0013] As a preferred technical solution of the present invention, a cover is provided on the top of the base frame, a supporting frame is provided in the cover, and the bidirectional module and the adjustment mechanism are both installed on the supporting frame, and the bidirectional module is located between the two adjustment mechanisms.

[0014] As a preferred technical solution of the present invention, the support frame is detachably mounted on the base frame, and a notch is provided on the support frame, and the notch matches the L-shaped limiting frame.

[0015] The beneficial effects of the present invention are: 1. This AOI equipment uses a flipping system to transport conformal coating on PCBs for inspection. When the conveying mechanism is in operation, the second drive wheel drives the drive shaft, causing the transmission assembly to operate. The transmission assembly drives the flipping lever to rotate intermittently. The flipping lever drives the vacuum suction element to complete the flipping operation of the PCB. By sharing a single power source, the number of power sources required is reduced, thereby reducing equipment energy consumption and lowering processing costs.

[0016] 2. This type of AOI equipment uses a flip-panel system to transport conformal coating on PCBs for inspection. There is no relative slip between the toothed belt and the drive pulley, drive pulley 1, and drive pulley 2, enabling more accurate transport of PCBs to the testing area.

[0017] 3. This type of AOI equipment, which uses a flip-panel system to transport conformal coating on PCBs for inspection, uses a divided control chamber to achieve zoned or individual control of the vacuum suction components. Zoned control can reduce the number of solenoid valves used and the complexity of the piping system, while individual control is more precise.

[0018] 4. This AOI equipment, which uses a flipping system to transport conformal coating on PCBs for inspection, uses a bidirectional module to control the movement of a transmission bracket away from the support frame. This transmission bracket drives the L-shaped limit bracket away from the support frame, ensuring that the L-shaped limit bracket does not hinder the flipping of the PCB.

[0019] 5. This type of AOI equipment uses a flip system to transport and inspect circuit boards with conformal coating. It uses two inspection sections to inspect the front and back of the circuit board respectively, which helps to improve the inspection speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the AOI equipment for transporting and inspecting conformal coating of circuit boards through a flip-plate system; Figure 2 This is a schematic diagram of the internal structure of the housing of the AOI equipment for transporting and inspecting conformal coating of circuit boards through a flip-plate system of the present invention; Figure 3 This is a schematic diagram of the base frame, conveying part and flipping mechanism of the AOI equipment for conveying and inspecting conformal coating of circuit boards through a flipping system of the present invention; Figure 4 This is a schematic structural diagram of the conveying part and the flipping mechanism of the AOI equipment for conveying and inspecting conformal coating of circuit boards through the flipping system of the present invention from a first perspective; Figure 5 This is a schematic structural diagram of the conveying part and the flipping mechanism of the AOI equipment for conveying and inspecting conformal coating of circuit boards through the flipping system of the present invention from a second perspective; Figure 6 This is a schematic diagram of the connection structure between the conveying part and the flipping mechanism of the AOI equipment for conveying and inspecting the conformal coating of the circuit board through the flipping system of the present invention; Figure 7 This is a schematic structural diagram of the second transmission wheel of the AOI equipment for transporting conformal coating of the circuit board for inspection through the flipping system of the present invention; Figure 8 This is an exploded view of the flip rod of the AOI equipment that transports and inspects conformal coating of circuit boards through a flip system of the present invention; Figure 9 This is a schematic diagram of the connection structure of the turning cylinder, partition plate and connecting cylinder of the AOI equipment for transporting and inspecting the conformal coating of the circuit board through the turning system of the present invention; Figure 10 This is a three-dimensional cross-sectional view of the turning cylinder and connecting cylinder of the AOI equipment for transporting and inspecting the conformal coating of the circuit board through the turning system of the present invention; Figure 11 This is a schematic diagram of the fixed end cover structure of the AOI equipment that transports and inspects conformal coating of circuit boards through a flip-plate system according to the present invention; Figure 12 The present invention is a schematic diagram of the fixed cylinder and annular fixed cover structure of the AOI equipment for conveying and inspecting the conformal coating of the circuit board through the flip system.

[0021] In the figure: 1. Base frame; 2. Cover; 3. Conveying mechanism; 31. Driving shaft 1; 32. Driving wheel; 33. Toothed belt; 34. Transmission wheel 1; 35. Driving shaft 2; 36. Reducer motor; 37. Tensioner; 38. Transmission wheel 2; 381. Limiting ring plate; 382. Intermediate gear; 39. Belt transmission structure; 4. Support frame; 5. Movable limiting mechanism; 51. L-shaped limiting frame; 52. Transmission bracket; 53. Bidirectional module; 6. Adjustment 7. Detection assembly; 8. Transmission assembly; 81. Transmission shaft; 82. Transmission gear; 83. Fan gear; 84. Mounting bracket; 9. Flip rod; 91. Flip cylinder; 92. Partition plate; 921. Air hole; 93. Sealing plate; 94. Connecting cylinder; 95. Partition strip; 96. Air cavity; 97. Fixing cylinder; 98. Annular fixing cover; 99. Annular plate; 991. Fixing strip; 992. Control tube; 10. Vacuum adsorption component. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] Example: Figures 1-6 As shown, the present invention uses a flip-plate system to transport and inspect the conformal coating of circuit boards. The AOI equipment includes a base frame 1, on which a conveying portion is provided. The conveying portion is composed of a conveying mechanism 3 and a support frame 4. The conveying mechanism 3 includes a toothed belt 33 and a drive assembly. The toothed belt 33 is mounted on the drive assembly. The drive assembly includes a first transmission wheel 34 and a second transmission wheel 38. The first transmission wheel 34 and the second transmission wheel 38 are rotatably connected to the support frame 4. The flip mechanism is composed of a transmission assembly 8, a flip lever 9 and a vacuum suction member 10. The transmission assembly 8 includes a transmission shaft 81, which is mounted on the second transmission wheel 38. The flip lever 9 drives the vacuum suction member 10 to flip the circuit board. The movable limiting mechanism 5 is used to limit the circuit board.

[0024] In this embodiment, two detection units are further provided above the conveying unit for detecting the conformal coating of the circuit board. The detection units are composed of an adjustment mechanism 6 and a detection assembly 7. The detection assembly 7 is mounted at the moving end of the adjustment mechanism 6. The detection assembly 7 is composed of a lighting assembly and a detection camera. The lighting assembly can be a UV lamp. The UV lamp illuminates the circuit board, the detection camera takes a picture, and the analysis system analyzes the image to automatically complete the detection of the conformal coating quality of the circuit board.

[0025] Among them, such as Figures 8-10As shown, the flip rod 9 includes a flip cylinder 91, a partition plate 92, a blocking plate 93, a connecting cylinder 94 and a fixed end cap. The flip cylinder 91 is sleeved outside the connecting cylinder 94. A plurality of partition bars 95 are provided between the flip cylinder 91 and the connecting cylinder 94. The two ends of the partition bar 95 are respectively connected to the partition plate 92 and the blocking plate 93. The space formed by the flip cylinder 91, the connecting cylinder 94, the partition plate 92 and the blocking plate 93 is divided into a plurality of air cavities 96 by the partition bar 95. The partition plate 92 is provided with a plurality of air cavities 96. 6, and a connecting interface connected to the air cavity 96 is provided on the turning cylinder 91. The connecting interface is connected to the vacuum adsorbent 10 through a supporting tube, and the vacuum adsorbent 10 is supported by the supporting tube. When the turning cylinder 91 rotates, the air holes 921 in the exhaust cavity area will move to the inflation cavity area, thereby releasing the circuit board. Similarly, the air holes 921 in the inflation cavity area will move to the exhaust cavity area, so that negative pressure is generated in the vacuum adsorbent 10, so that the vacuum adsorbent 10 is adsorbed on the circuit board.

[0026] Among them, such as Figure 11 and Figure 12 As shown, the fixed end cover includes a fixed cylinder 97 and an annular fixed cover 98 that can rotate with the connecting cylinder 94. The fixed cylinder 97 is connected to the annular fixed cover 98. An annular plate 99 that rotates with the connecting cylinder 94 is installed in the fixed cylinder 97. At least two fixing strips 991 are provided on one side of the annular plate 99. An installation space that can accommodate the insertion of the flip cylinder 91 is formed between the fixing strips 991 and the inner wall of the fixed cylinder 97. The space formed by the fixed cylinder 97, the annular plate 99, the flip cylinder 91 and the connecting cylinder 94 is divided into at least two control chambers connected to the air hole 921 by the fixing strips 991. A control pipe 992 is provided on the outer wall of the fixed cylinder 97. The control pipe 992 One end of 92 is connected to the annular plate 99 and communicated with the control chamber. The control tube 992 can be connected to the vacuum generating system through the pipeline system, and can also be connected to the inflation system through the pipeline system. The control chamber is communicated with the air chamber 96 through the air hole 921, and the control tube 992 is communicated with the control chamber. Therefore, after the vacuum generating system is connected to the control tube 992 through the pipeline system, the vacuum adsorption component 10 can be evacuated to form a negative pressure in the vacuum adsorption component 10, so that it can be adsorbed on the circuit board. By inflating through the inflation system, the vacuum adsorption component 10 can restore the positive pressure and release the circuit board. The fixed end cover is fixedly mounted on the mounting bracket 84 to avoid pipeline entanglement caused by rotation.

[0027] Embodiment 1: There are two control chambers, one of which is used as an air extraction chamber and the other as an air filling chamber. The vacuum adsorption element 10 is controlled in different areas, which can reduce the complexity of the piping system and the difficulty of installation. Embodiment 2: If there are several air cavities 96, several control cavities are divided to control each vacuum adsorption element 10 individually, which can achieve more precise control.

[0028] It should be noted that a sealing ring may be provided between the connecting cylinder 94 and the annular fixed cover 98 and the annular plate 99 to improve the sealing performance; a sealing ring may also be provided between the fixed cylinder 97 and the flip cylinder 91 to improve the sealing performance.

[0029] Among them, such as Figure 6 As shown, the transmission assembly 8 also includes a transmission gear 82, a sector gear 83 meshing with the transmission gear 82, and a mounting bracket 84. The transmission gear 82 is sleeved and fixed on the outside of the flip cylinder 91, and the sector gear 83 is sleeved and fixed on the transmission shaft 81. The mounting bracket 84 is detachably mounted on the support frame 4, and the transmission shaft 81 and the connecting cylinder 94 are both rotatably connected to the mounting bracket 84. The annular fixing cover 98 is detachably mounted on the mounting bracket 84.

[0030] When the conveying mechanism 3 is in operation, the toothed belt 33 is meshed with the transmission wheel 2 38 to rotate the transmission shaft 81, and the transmission shaft 81 drives the sector gear 83 to mesh with the transmission gear 82, so that the transmission gear 82 drives the flip cylinder 91 to rotate a certain angle. The flip cylinder 91 drives the vacuum suction component 10 with the help of the support tube, so that the circuit board sucked by the vacuum suction component 10 can be turned over.

[0031] Among them, such as Figure 4-Figure 6 As shown, the drive assembly also includes a drive shaft 1 31, a drive shaft 2 35 and a reduction motor 36. The drive shaft 1 31 and the drive shaft 2 35 are both sleeved and fixed with a drive wheel 32. The drive shaft 1 31 is connected to the drive shaft 2 35 through a transmission belt. The output end of the reduction motor 36 is connected to the drive shaft 1 31 through a belt transmission structure 39, and two tensioning wheels 37 are provided outside the drive wheel 32 and the drive wheel 2 38. The drive shaft 1 31, the drive shaft 2 35 and the tensioning wheel 37 are all rotatably connected to the support frame 4. The reduction motor 36 is installed in the base frame 1 and supported by the base frame 1. The provided tensioning wheel 37 serves to tension the toothed belt 33.

[0032] The reduction motor 36 drives the drive shaft 1 31 to rotate through the belt transmission structure 39. The drive shaft 1 31 causes the drive shaft 2 35 to rotate synchronously through the transmission belt, thereby driving the drive wheel 32 to rotate. The toothed belt 33 is driven to move through the meshing transmission between the drive wheel 32 and the toothed belt 33. The toothed belt 33 is driven to rotate through the meshing transmission between the toothed belt 33 and the transmission wheel 1 34 and the transmission wheel 2 38, thereby driving the transmission wheel 1 34 and the transmission wheel 2 38 to rotate, thereby realizing the transportation of the circuit board. There is no relative sliding between the toothed belt 33 and the drive wheel 32, the transmission wheel 1 34 and the transmission wheel 2 38, so that the circuit board can be more accurately transported to the test area.

[0033] In this embodiment, the belt drive structure 39 includes two double-grooved transmission wheels, which are respectively sleeved and fixed on the drive shaft 31 and the output shaft of the reduction motor 36. The two double-grooved transmission wheels are connected by a transmission belt, so that the reduction motor 36 can drive the drive shaft 31 to rotate. This is one of the implementation methods of the belt drive structure 39. Depending on the specific situation, other implementation methods can also be used to achieve the purpose of driving the drive shaft 31 to rotate by the reduction motor 36.

[0034] Among them, such as Figure 7 As shown, the driving wheel 32, transmission wheel 1 34 and transmission wheel 2 38 are all composed of two limiting ring plates 381 and an intermediate gear 382 that can engage with the toothed belt 33. The intermediate gear 382 is installed between the two limiting ring plates 381. The setting of the limiting ring plates 381 can reduce the probability of the toothed belt 33 being separated from the intermediate gear 382.

[0035] Among them, such as Figure 2 As shown, the movable limiting mechanism 5 includes an L-shaped limiting frame 51, a transmission bracket 52 and a bidirectional module 53. The transmission bracket 52 is installed on the movable seat of the bidirectional module 53, and the L-shaped limiting frame 51 is installed on the transmission bracket 52. When the circuit board needs to be flipped, the bidirectional module 53 is started, and the transmission bracket 52 is controlled by the bidirectional module 53 to move to the side away from the support frame 4. The L-shaped limiting frame 51 is driven to separate from the support frame 4 through the transmission bracket 52, so that the L-shaped limiting frame 51 will not hinder the flipping of the circuit board.

[0036] Specifically, the support frame 4 can be detachably mounted on the base frame 1, and a notch is provided on the support frame 4, which matches the L-shaped limit frame 51, and the L-shaped limit frame 51 slides with the notch. When conveying the circuit board, the support frame 4 and the L-shaped limit frame 51 are used in conjunction with each other to limit the circuit board.

[0037] Among them, such as Figure 1 and Figure 2As shown, a cover body 2 is provided on the top of the base frame 1, a supporting frame is provided inside the cover body 2, and the bidirectional module 53 and the adjustment mechanism 6 are both installed on the supporting frame. The bidirectional module 53 is located between the two adjustment mechanisms 6, and the supporting frame provides support for the bidirectional module 53 and the adjustment mechanism 6.

[0038] During operation, the reduction motor 36 drives the drive shaft 1 31 to rotate through the belt transmission structure 39, and the drive shaft 1 31 causes the drive shaft 2 35 to rotate synchronously through the transmission belt, thereby driving the drive wheel 32 to rotate, and the toothed belt 33 is driven to move by the meshing transmission between the drive wheel 32 and the toothed belt 33 to transport the circuit board. When the circuit board arrives at the first detection area, the front side of the circuit board is detected by the detection part located in the first detection area. After the detection is completed, the transmission bracket 52 is controlled by the bidirectional module 53 to move to the side away from the support frame 4, and the L-shaped limit frame 51 is driven to separate from the support frame 4 by the transmission bracket 52. After the circuit board enters the flipping area, the vacuum suction component 10 sucks the circuit board, and the toothed belt 33 is engaged with the transmission wheel 2 38 to rotate the transmission shaft 81. The transmission shaft 81 drives the sector gear 83 to engage with the transmission gear 82, so that the transmission gear 82 drives the flipping cylinder 91 to rotate a certain angle. The flipping cylinder 91 drives the vacuum suction component 10 with the help of the support tube to flip the circuit board. When the flipping is completed, the circuit board is released. When the circuit board reaches the second inspection area, the back of the circuit board is inspected by the inspection part located in the second inspection area, and then the circuit board is sent out of the inspection equipment through the conveying mechanism 3.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. The AOI equipment for testing the conformal coating of circuit boards is transported through a flipping system, which is characterized by: include: A base frame (1), wherein a conveying portion is provided on the base frame (1), wherein the conveying portion is composed of a conveying mechanism (3) and a support frame (4), wherein the conveying mechanism (3) includes a toothed belt (33) and a driving assembly, wherein the toothed belt (33) is mounted on the driving assembly, wherein the driving assembly includes a first transmission wheel (34) and a second transmission wheel (38), wherein the first transmission wheel (34) and the second transmission wheel (38) are rotatably connected to the support frame (4); The flip mechanism is composed of a transmission assembly (8), a flip rod (9) and a vacuum adsorption member (10), wherein the transmission assembly (8) includes a transmission shaft (81), the transmission shaft (81) is mounted on a second transmission wheel (38), and the flip rod (9) drives the vacuum adsorption member (10) to flip the circuit board; The movable limiting mechanism (5) is used to limit the circuit board.

2. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 1, characterized in that: The flip rod (9) comprises a flip cylinder (91), a partition plate (92), a blocking plate (93), a connecting cylinder (94) and a fixed end cap. The flip cylinder (91) is sleeved outside the connecting cylinder (94). A plurality of partition bars (95) are provided between the flip cylinder (91) and the connecting cylinder (94). The two ends of the partition bars (95) are respectively connected to the partition plate (92) and the blocking plate (93). The space formed by the flip cylinder (91), the connecting cylinder (94), the partition plate (92) and the blocking plate (93) is divided into a plurality of air cavities (96) by the partition bars (95). The partition plate (92) is provided with an air hole (921) communicating with the air cavity (96). The flip cylinder (91) is provided with a connection interface communicating with the air cavity (96). The connection interface is connected to the vacuum adsorption component (10) through a support tube.

3. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 2, characterized in that: The fixed end cover comprises a fixed cylinder (97) and an annular fixed cover (98) capable of rotating with the connecting cylinder (94). The fixed cylinder (97) is connected to the annular fixed cover (98). An annular plate (99) capable of rotating with the connecting cylinder (94) is installed in the fixed cylinder (97). At least two fixing bars (991) are provided on one side of the annular plate (99). An installation space capable of accommodating the insertion of the flip cylinder (91) is formed between the fixing bars (991) and the inner wall of the fixed cylinder (97). The space formed by the fixed cylinder (97), the annular plate (99), the flip cylinder (91) and the connecting cylinder (94) is divided into at least two control chambers connected to the air hole (921) by the fixing bars (991). A control tube (992) is provided through the outer wall of the fixed cylinder (97). One end of the control tube (992) is connected to the annular plate (99) and is connected to the control chamber.

4. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 3, characterized in that: The transmission assembly (8) further comprises a transmission gear (82), a sector gear (83) meshing with the transmission gear (82), and a mounting bracket (84), wherein the transmission gear (82) is sleeved and fixed on the outside of the flip cylinder (91), the sector gear (83) is sleeved and fixed on the transmission shaft (81), the mounting bracket (84) is detachably mounted on the support frame (4), and the transmission shaft (81) and the connecting cylinder (94) are both rotatably connected to the mounting bracket (84), and the annular fixing cover (98) is detachably mounted on the mounting bracket (84).

5. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 1, characterized in that: The driving assembly further comprises a driving shaft 1 (31), a driving shaft 2 (35) and a reduction motor (36), wherein the driving shaft 1 (31) and the driving shaft 2 (35) are both sleeved and fixed with a driving wheel (32), the driving shaft 1 (31) is connected to the driving shaft 2 (35) through a transmission belt, the output end of the reduction motor (36) is connected to the driving shaft 1 (31) through a belt transmission structure (39), and two tensioning wheels (37) are provided outside the driving wheel (32) and the driving wheel 2 (38), and the driving shaft 1 (31), the driving shaft 2 (35) and the tensioning wheel (37) are all rotatably connected to the support frame (4).

6. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 5, characterized in that: The driving wheel (32), transmission wheel 1 (34) and transmission wheel 2 (38) are each composed of two limiting ring plates (381) and an intermediate gear (382) capable of meshing with the toothed belt (33), and the intermediate gear (382) is installed between the two limiting ring plates (381).

7. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 1, characterized in that: The movable limiting mechanism (5) comprises an L-shaped limiting frame (51), a transmission bracket (52) and a bidirectional module (53); the transmission bracket (52) is mounted on a movable seat of the bidirectional module (53); and the L-shaped limiting frame (51) is mounted on the transmission bracket (52).

8. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 7, characterized in that: The invention also includes two detection parts arranged above the conveying part, which are used to detect the conformal coating of the circuit board. The detection parts are composed of an adjustment mechanism (6) and a detection component (7). The detection component (7) is installed at the moving end of the adjustment mechanism (6). The detection component (7) is composed of a lighting component and a detection camera.

9. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 8, characterized in that: A cover body (2) is provided on the top of the base frame (1), a supporting frame is provided inside the cover body (2), and the bidirectional module (53) and the adjustment mechanism (6) are both installed on the supporting frame, and the bidirectional module (53) is located between the two adjustment mechanisms (6).

10. The AOI equipment for transporting and inspecting conformal coating of circuit boards through a flipping system according to claim 7, characterized in that: The support frame (4) is detachably mounted on the base frame (1), and a notch is provided on the support frame (4), and the notch matches the L-shaped limiting frame (51).

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