Laser precision SMT online coding device

Abstract

The invention belongs to the technical field of laser coding, and particularly relates to a laser precision SMT online coding device which comprises a base, a mounting table is fixedly connected to one side of the upper end face of the base, a laser coding machine body is arranged at the upper end of the mounting table, a second rack is fixedly connected to one side of the upper end face of the base, and a first conveying belt is arranged on the second rack. The base is further provided with a PCB feeding assembly. The PCB feeding assembly comprises a first rack fixedly connected to one side of the upper end face of the base. The PCB feeding assembly is utilized, automatic feeding and code printing of PCBs are achieved, the manual feeding process of workers is omitted, the labor intensity of the workers is reduced, in addition, before the clamping jaw air cylinder clamps the PCBs, the PCBs are changed from disordered stacking to linear arrangement, the clamping jaw air cylinder can accurately clamp the PCBs only by moving according to the preset track, and the working efficiency is improved. And the problems that the clamping difficulty is greatly increased and the clamping error rate is increased due to the fact that the poses of the PCBs are disordered and the PCBs cover each other are solved.

Description

Technical Field

[0001] This invention belongs to the field of laser marking technology, specifically a laser precision SMT online marking device. Background Technology

[0002] Laser precision SMT online marking device is a highly automated and high-precision marking device designed specifically for surface mount technology production lines. It uses a laser beam to make non-contact, permanent marks on PCB boards, component housings, or specific labels.

[0003] Patent CN221389341U discloses a laser precision SMT online coding device, including a coding machine body. A dust cover is fixedly installed on the top of the coding machine body, and a slide rail is fixedly installed on the top of the coding machine body, with the slide rail located inside the dust cover. A slide groove is opened on the top of the slide rail, and a slider is slidably connected inside the slide groove. A support block is fixedly installed on the top of the slider, and a dust collection hopper is fixedly installed on the top of the support block. A first motor is fixedly installed on one side of the slide rail, and the drive shaft of the first motor is rotatably connected to one side of the slide rail. A first reciprocating screw is fixedly installed on the drive shaft of the first motor. The beneficial effect of this patent is that the drive shaft of the first motor drives the first reciprocating screw to rotate, thereby driving the slider to reciprocate, which in turn drives the dust collection hopper to reciprocate, thereby increasing the adsorption range of the dust collection hopper and improving the adsorption efficiency of dust inside the dust cover.

[0004] However, the above technical solutions still have the following shortcomings in practical applications: When laser marking PCBs, workers manually load the PCBs to the marking station and then move the laser device to the designated position to complete the marking. This method significantly increases worker workload due to frequent manual loading when dealing with large batches of PCBs. To reduce this workload, robotic arms equipped with vision positioning systems are commonly used to automatically grip the PCBs. To ensure visual recognition accuracy and reduce the failure rate, multiple PCBs to be gripped must be neatly arranged, which helps improve the success rate of the robotic arm. However, in actual production, batches of PCBs after the previous process are often randomly stacked in material frames or containers. In this state, if the robotic arm directly grasps them sequentially, the chaotic PCB positions and overlapping of the boards greatly increase the difficulty of gripping, raise the error rate, and ultimately affect the continuity and production efficiency of the entire marking process. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve at least one of the technical problems mentioned in the background art, the present invention proposes a laser precision SMT online marking device.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a laser precision SMT online marking device, including a base, a mounting platform fixedly connected to one side of the upper end face of the base, a laser marking machine body set on the upper end of the mounting platform, a frame two fixedly connected to one side of the upper end face of the base, a conveyor belt one set on the frame two, and a PCB board loading assembly set on the base. The PCB board loading assembly includes a frame one fixedly connected to one side of the upper surface of the base. A conveyor belt two is provided on the frame one. A limit frame is fixedly connected to one side of the upper end of the frame one. Multiple width adjustment plates are distributed laterally at equal intervals in the sliding groove of the limit frame. The frontmost width adjustment plate is fixedly connected to the limit frame, and the remaining width adjustment plates are slidably connected to the limit frame. The bottom of the width adjustment plate is in contact with the surface of the conveyor belt two. A limit plate is fixedly connected to one side of the upper end of the last width adjustment plate. A baffle is slidably connected to one side of the limit frame. A stop bar is fixedly connected to one side of the upper end of the frame one. The end of the width adjustment plate is in contact with one end face of the stop bar. A transverse frame is slidably arranged on one side of the upper surface of the base via an X-axis guide rail. A lifting frame is slidably arranged on the transverse frame via a Z-axis guide rail. A slider is slidably arranged on one side of the lifting frame via a Y-axis guide rail. A flipping block is rotatably arranged on one side of the bottom of the slider. A gripper cylinder is rotatably arranged on one side of the lower end of the flipping block.

[0007] Preferably, one end of the frontmost and rearmost width adjustment plates is rotatably provided with a second connecting rod, and one end of the other width adjustment plates is rotatably provided with a first connecting rod. One end of the second connecting rod is rotatably connected to one end of the first connecting rod, and the ends of two adjacent connecting rods are rotatably connected.

[0008] Preferably, an electric push rod two is fixedly connected to one side of the limiting frame, and the piston end of the electric push rod two is fixedly connected to one end of the last side width adjustment plate.

[0009] Preferably, an electric actuator is fixedly connected to one side of the limiting frame, and the piston end of the electric actuator is fixedly connected to one end of the baffle.

[0010] Preferably, a vision sensor is fixedly installed on one side of the slider, and a motor is fixedly connected to one side of the slider. The output end of the motor is fixedly connected to one end of the flipping block.

[0011] Preferably, a second motor is fixedly connected to one side of the upper end face of the flipping block, and the output end of the second motor is fixedly connected to one end of the gripper cylinder.

[0012] Preferably, it also includes a drop-promoting component; The drop-promoting component includes friction rollers rotatably disposed at both ends of the upper side of the width-adjusting plate, and a lifting plate is inserted into and slidably connected to one side of the upper side of the width-adjusting plate.

[0013] Preferably, a worm gear is fixedly connected to one end of the friction roller, a worm is rotatably provided on one end of the width adjustment plate, and the ends of two adjacent worms are inserted and slidably connected through keyways. The worm and the worm gear mesh with each other. A motor is fixedly connected to one end of the width adjustment plate, and the output end of the motor is fixedly connected to one end of the worm.

[0014] Preferably, a transmission rod is rotatably provided on one side of the width adjustment plate, and an eccentric wheel is fixedly sleeved on one side of the transmission rod. The eccentric wheel is in contact with the bottom of the lifting plate, and the ends of two adjacent transmission rods are inserted and slidably connected.

[0015] Preferably, one end of the width adjustment plate on one side is fixedly connected to a motor three, and the output end of the motor three is fixedly connected to one end of the transmission rod.

[0016] The beneficial effects of this invention are as follows: 1. The laser precision SMT online marking device of this invention utilizes a PCB board loading assembly to achieve automatic PCB loading and marking, eliminating the need for manual loading by workers and reducing their labor intensity. Furthermore, before gripping the PCB boards, the gripper cylinder transforms the PCB boards from a disordered stack to a linear arrangement. The gripper cylinder moves only along a preset trajectory to accurately grasp the PCB boards, avoiding the increased difficulty and error rate caused by disordered PCB board positioning and mutual obstruction. In addition, since the PCB boards do not obstruct each other, the vision sensor can easily identify the orientation of the PCB boards and adjust their posture to ensure they are correctly positioned on the conveyor belt, thereby guaranteeing marking accuracy.

[0017] 2. The laser precision SMT online marking device of this invention utilizes a drop-promoting component. When multiple PCB boards are placed in the limiting frame, multiple lifting plates alternately push the PCB boards, causing their posture to continuously change until they can smoothly slide into the limiting channel. Furthermore, since multiple limiting channels are provided, the probability of the PCB board falling into the limiting channel increases, which helps ensure continuous and stable loading. In addition, after the PCB board is placed above the width adjustment plate, the friction between the PCB board and multiple friction rollers disperses the PCB board within the limiting frame cavity, reducing the PCB board stacking height. This facilitates the PCB board entering the limiting channel from multiple directions, improving the utilization rate of the multiple limiting channels and further enhancing loading efficiency. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure at the limiting frame; Figure 3 This is a schematic diagram of a three-dimensional structure of a conveyor belt; Figure 4 This is a schematic diagram of a three-dimensional structure of the rack; Figure 5 This is a schematic diagram of the three-dimensional structure at the transverse sliding frame; Figure 6 This is a schematic diagram of the three-dimensional structure at the slider. Figure 7 This is a schematic diagram of the internal three-dimensional structure of the limiting frame; Figure 8 This is a schematic diagram of the three-dimensional structure of link one and link two; Figure 9 This is a schematic diagram of the three-dimensional structure at the width adjustment plate. Figure 10 yes Figure 9 Enlarged structural diagram of section A; Figure 11 This is a schematic diagram of the three-dimensional structure at the lifting plate. Figure 12 This is a three-dimensional structural diagram of one part of the rack from another perspective; Figure 13 yes Figure 12 Enlarged structural diagram of section B; Figure 14 yes Figure 12 Enlarged structural diagram of section C.

[0020] In the diagram: 1. Base; 2. Limiting frame; 3. Conveyor belt 1; 4. Horizontal transfer frame; 5. X-axis guide rail 1; 6. Frame 1; 7. Motor 4; 8. Limiting plate; 9. Baffle; 10. Width adjustment plate; 11. Electric push rod 1; 12. Lifting frame; 13. Z-axis guide rail 1; 14. Y-axis guide rail 1; 15. Slider; 16. Vision sensor; 17. Motor 1; 18. Grip cylinder; 19. Tilting block; 20. Motor 2; 21. Stop bar; 22. Electric push rod 2; 23. Connecting rod 1; 24. Conveyor belt 2; 25. Frame 2; 26. Mounting platform; 27. Laser marking machine body; 28. Transmission rod; 29. ​​Worm gear; 30. Worm wheel; 31. Eccentric wheel; 32. Connecting rod 2; 33. Lifting plate; 34. Friction roller; 35. Motor 3. Detailed Implementation

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

[0022] Please refer to Figures 1-14The present invention provides a technical solution: a laser precision SMT online marking device, including a base 1, a mounting platform 26 fixedly connected to one side of the upper end face of the base 1, a laser marking machine body 27 set on the upper end of the mounting platform 26, a frame 25 fixedly connected to one side of the upper end face of the base 1, a conveyor belt 3 set on the frame 25, and a PCB board loading assembly set on the base 1. The PCB board loading assembly includes a frame 6 fixedly connected to one side of the upper surface of the base 1. A conveyor belt 24 is mounted on the frame 6. A limit frame 2 is fixedly connected to one side of the upper end of the frame 6. Multiple width-adjusting plates 10 are equidistantly distributed laterally in the sliding groove of the limit frame 2. The foremost width-adjusting plate 10 is fixedly connected to the limit frame 2, while the remaining width-adjusting plates 10 are slidably connected to the limit frame 2. The bottom of each width-adjusting plate 10 is in contact with the surface of the conveyor belt 24. A limit plate 8 is fixedly connected to one side of the upper end of the last width-adjusting plate 10. A baffle 9 is slidably connected to one side, and a baffle 21 is fixedly connected to one side of the upper end of the frame 6. The end of the width adjustment plate 10 is in contact with one side of the baffle 21. A transverse frame 4 is slidably set on one side of the upper end of the base 1 via the X-axis guide rail 5. A lifting frame 12 is slidably set on the transverse frame 4 via the Z-axis guide rail 13. A slider 15 is slidably set on one side of the lifting frame 12 via the Y-axis guide rail 14. A flip block 19 is rotatably set on one side of the bottom of the slider 15. A gripper cylinder 18 is rotatably set on one side of the lower end of the flip block 19.

[0023] In this embodiment, as Figures 2-8 , Figure 12 , Figure 13 As shown, the frontmost and rearmost width adjustment plates 10 are rotatably equipped with connecting rod 22 at one end, and the other width adjustment plates 10 are rotatably equipped with connecting rod 13 at one end. One end of connecting rod 22 is rotatably connected to one end of connecting rod 13, and the ends of two adjacent connecting rods 13 are rotatably connected.

[0024] An electric actuator 22 is fixedly connected to one side of the limiting frame 2, and the piston end of the electric actuator 22 is fixedly connected to one end of the last side width adjustment plate 10.

[0025] An electric actuator 11 is fixedly connected to one side of the limiting frame 2, and the piston end of the electric actuator 11 is fixedly connected to one end of the baffle 9.

[0026] A vision sensor 16 is fixedly installed on one side of the slider 15, and a motor 17 is fixedly connected to one side of the slider 15. The output end of the motor 17 is fixedly connected to one end of the flip block 19.

[0027] A motor 20 is fixedly connected to one side of the upper end face of the flipping block 19, and the output end of the motor 20 is fixedly connected to one end of the gripper cylinder 18.

[0028] Specifically, in existing technologies, laser marking on PCBs typically requires workers to manually load the PCBs to the marking station and then move the laser device to the designated position to complete the marking. This method significantly increases worker workload due to frequent manual loading when dealing with large batches of PCBs. To reduce this workload, robotic arms equipped with vision positioning systems are commonly used to automatically grip PCBs. To ensure visual recognition accuracy and reduce the failure rate, multiple PCBs to be gripped must be neatly arranged, which helps improve the success rate of the robotic arm. However, in actual production, batches of PCBs after the previous process are often randomly stacked in material frames or containers. In this state, if the robotic arm directly grasps them sequentially, the chaotic PCB positions and overlapping of the boards greatly increase the difficulty of gripping, raise the error rate, and ultimately affect the continuity and production efficiency of the entire marking process.

[0029] Therefore, to avoid the above problems, the working principle of this embodiment is as follows: This solution is applied to marking bare boards within the same batch of circular PCBs of identical specifications. A bare board is a finished substrate that has not yet been fitted with any electronic components, and in most cases, the diameter of the PCB is greater than its thickness.

[0030] First, based on the thickness of the PCB board, the electric actuator 22 drives one of the width adjustment plates 10 to slide at the groove of the limiting frame 2. Through the transmission cooperation of connecting rod 23 and connecting rod 32, multiple width adjustment plates 10 slide simultaneously, changing the distance between adjacent width adjustment plates 10 until this distance equals the thickness of the PCB board. The electric actuator 11 drives the baffle 9 to rise and fall, adjusting the distance between the bottom of the baffle 9 and the surface of the conveyor belt 24, making this distance equal to the diameter of the PCB board. Furthermore, the gap between two adjacent width adjustment plates 10 serves as a limiting channel. Multiple PCB boards in the material frame or container are poured into the limiting frame 2. Since the width of the limiting channel is equal to the thickness of the PCB board, when the PCB board is upright and its two side ends are parallel to the two side ends of the limiting channel, the PCB board will randomly fall into each limiting channel. The PCB boards will not be arranged side by side in the limiting channel. Then, the second conveyor belt 24 will rotate, moving the PCB board and causing it to move out from the bottom of the limiting frame 2. Due to the obstruction of the baffle 9, the PCB boards moving out from the bottom of the limiting frame 2 will not overlap. Through the above operation, multiple PCB boards can be arranged horizontally in the limiting channel. As the second conveyor belt 24 rotates, the PCB boards will be blocked by the baffle 21. Since the vision sensor 16 is initially positioned above the end of the second conveyor belt 24, it can detect the arrangement of PCB boards in each limiting channel. When the vision sensor 16 detects that a PCB board is blocked by the stop bar 21, the position of the gripper cylinder 18 in the X, Y, and Z axes can be adjusted via the X-axis guide rail 5, Y-axis guide rail 14, and Z-axis guide rail 13. The gripper cylinder 18 then clamps the PCB board and removes it from the limiting channel. Subsequently, the motor 17 drives the flipping block 19 to rotate 90 degrees. Then, based on the visually recognized front and back information of the PCB board, the motor 20 drives the PCB board to rotate, making the surface to be marked face up. The gripper cylinder 18 then places the PCB board on the first conveyor belt 3, which transports it to the laser marking machine body 27. The laser marking machine body 27 then marks the surface of the PCB board. The operator can place a container below the end of the first conveyor belt 3, and the marked PCB board can fall into the container along the first conveyor belt 3 for collection. By repeating the above operation, the PCB board can be taken out from each limit channel in sequence by the gripper cylinder 18 and its angle can be adjusted. Then it can be placed on the conveyor belt 3 for coding, which saves the workers from the manual loading process and reduces the labor intensity of the workers. In addition, before the gripper cylinder 18 grips the PCB board, the PCB board will be transformed from a messy stack to a linear arrangement. The gripper cylinder 18 can accurately grip the PCB board by moving only according to the preset trajectory, avoiding the problem of increased gripping difficulty and increased gripping error rate caused by the chaotic position and mutual obstruction of the PCB board.Furthermore, since the PCBs do not overlap, the vision sensor 16 can easily identify the orientation of the PCBs and adjust their posture so that they are placed on the conveyor belt 3 in the correct orientation, thereby ensuring the accuracy of the coding.

[0031] In this embodiment, as Figure 7 , Figures 9-14 As shown, it also includes a drop-promoting component; The drop-promoting component includes friction rollers 34 rotatably disposed at both ends of the upper side of the width adjustment plate 10, and a lifting plate 33 is inserted into and slidably connected to one side of the upper end of the width adjustment plate 10.

[0032] One end of the friction roller 34 is fixedly connected to a worm gear 30, and one end of the width adjustment plate 10 is rotatably provided with a worm 29. The ends of two adjacent worms 29 are inserted and slidably connected through keyways. The worm 29 and the worm gear 30 mesh with each other. One end of the width adjustment plate 10 is fixedly connected to a motor 4 7, and the output end of the motor 4 7 is fixedly connected to one end of the worm 29.

[0033] A transmission rod 28 is rotatably mounted on one side of the width adjustment plate 10. An eccentric wheel 31 is fixedly sleeved on one side of the transmission rod 28. The eccentric wheel 31 is in contact with the bottom of the lifting plate 33, and the ends of two adjacent transmission rods 28 are inserted and slidably connected.

[0034] One end of the width adjustment plate 10 is fixedly connected to a motor 35, and the output end of the motor 35 is fixedly connected to one end of the transmission rod 28.

[0035] Specifically, in the above embodiments, although the gap between the width adjustment plates 10 and the way the PCB board falls under the action of gravity can be used to arrange the PCB board in the limiting channel so that the gripper cylinder 18 can grip it, this requires the PCB board to fall into the limiting channel in a fixed posture. When the PCB board is placed on the width adjustment plate 10 in a flat state, since the PCB board is no longer subjected to any external force, the PCB board cannot fall into the limiting channel, resulting in the interruption of the feeding operation.

[0036] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows: After multiple PCB boards are placed in the limiting frame 2, the motor 35 drives the transmission rod 28 on one side to rotate. Since the multiple transmission rods 28 are connected by keyways, even if the spacing between adjacent width adjustment plates 10 changes, the multiple transmission rods 28 remain connected and can rotate synchronously. When the multiple transmission rods 28 rotate synchronously, multiple eccentric wheels 31 also rotate synchronously. When the distal end of the eccentric wheel 31 contacts the bottom of the lifting plate 33, it will lift the lifting plate 33. When the proximal end of the eccentric wheel 31 contacts the bottom of the lifting plate 33, the lifting plate 33 will fall under the action of gravity. This forms the up-and-down reciprocating motion of the lifting plate 33. The lifting plate 33 continuously pushes the PCB board, causing the PCB board's posture to change continuously until it can smoothly slide into the limiting channel. Furthermore, since there are multiple limiting channels, the probability of the PCB board falling into the limiting channel will also increase, which helps to ensure the continuous and stable progress of the loading operation. Furthermore, since the adjacent eccentric wheels 31 have different angles, the two adjacent lifting plates 33 will not rise and fall synchronously, thus avoiding the situation where the PCB board remains balanced and cannot be changed in orientation because the two lifting plates 33 lift the flat PCB board at the same time.

[0037] Although the above method allows the PCB board's posture to be continuously changed until it falls into the limiting channel, if the PCB boards are concentrated in a localized area within the limiting frame 2, they will only fall into a limited range of limiting channels. Simultaneously, if the bottom PCB board has not yet fallen into the limiting channel in a suitable posture, the upper PCB board will also be unable to enter due to the jamming below, thus affecting loading efficiency. Therefore, to solve this problem, when the spacing of the width adjustment plate 10 changes, the adjacent worm gears 29 remain in an inserted state and can rotate synchronously. After the PCB board is placed above the width adjustment plate 10, the motor 4 drives one side of the worm gear 29 to rotate, causing multiple worm gears 29 to rotate synchronously. This causes the worm wheel 30 and friction roller 34 to rotate synchronously. The friction between the friction roller 34 and the PCB board disperses the PCB board within the limiting frame 2, reducing the PCB board stacking height. This facilitates the PCB board entering the limiting channel from multiple directions, improving the utilization rate of multiple limiting channels and further enhancing loading efficiency.

[0038] Working principle: First, based on the thickness of the PCB board, the electric actuator 22 drives one side of the width adjustment plate 10 to slide at the groove of the limiting frame 2. Under the transmission cooperation of connecting rod 23 and connecting rod 32, multiple width adjustment plates 10 slide simultaneously, changing the distance between adjacent width adjustment plates 10 until this distance equals the thickness of the PCB board. The electric actuator 11 drives the baffle 9 to rise and fall, adjusting the distance between the bottom of the baffle 9 and the surface of the conveyor belt 24, making this distance equal to the diameter of the PCB board. Furthermore, the gap between two adjacent width adjustment plates 10 serves as a limiting channel. Multiple PCB boards in the material frame or container are poured into the limiting frame 2. Since the width of the limiting channel is equal to the thickness of the PCB board, when the PCB board is upright and its two side ends are parallel to the two side ends of the limiting channel, the PCB board will randomly fall into each limiting channel. The PCB boards will not be arranged side by side in the limiting channel. Then, the second conveyor belt 24 will rotate, moving the PCB board and causing it to move out from the bottom of the limiting frame 2. Due to the obstruction of the baffle 9, the PCB boards moving out from the bottom of the limiting frame 2 will not overlap. Through the above operation, multiple PCB boards can be arranged horizontally in the limiting channel. As the second conveyor belt 24 rotates, the PCB boards will be blocked by the baffle 21. Since the vision sensor 16 is initially positioned above the end of the second conveyor belt 24, it can detect the arrangement of PCB boards in each limiting channel. When the vision sensor 16 detects that a PCB board is blocked by the stop bar 21, the position of the gripper cylinder 18 in the X, Y, and Z axes can be adjusted via the X-axis guide rail 5, Y-axis guide rail 14, and Z-axis guide rail 13. The gripper cylinder 18 then clamps the PCB board and removes it from the limiting channel. Subsequently, the motor 17 drives the flipping block 19 to rotate 90 degrees. Then, based on the visually recognized front and back information of the PCB board, the motor 20 drives the PCB board to rotate, making the surface to be marked face up. The gripper cylinder 18 then places the PCB board on the first conveyor belt 3, which transports it to the laser marking machine body 27. The laser marking machine body 27 then marks the surface of the PCB board. The operator can place a container below the end of the first conveyor belt 3, and the marked PCB board can fall into the container along the first conveyor belt 3 for collection. By repeating the above operation, the PCB board can be taken out from each limit channel in sequence by the gripper cylinder 18 and its angle can be adjusted. Then it can be placed on the conveyor belt 3 for coding, which saves the workers from the manual loading process and reduces the labor intensity of the workers. In addition, before the gripper cylinder 18 grips the PCB board, the PCB board will be transformed from a messy stack to a linear arrangement. The gripper cylinder 18 can accurately grip the PCB board by moving only according to the preset trajectory, avoiding the problem of increased gripping difficulty and increased gripping error rate caused by the chaotic position and mutual obstruction of the PCB board.Furthermore, since the PCBs do not overlap, the vision sensor 16 can easily identify the orientation of the PCBs and adjust their posture to ensure they are placed correctly on the conveyor belt 3, thus guaranteeing the accuracy of the marking. After multiple PCBs are placed in the limiting frame 2, the motor 35 drives the transmission rod 28 on one side to rotate. Since the multiple transmission rods 28 are connected by keyways, even if the spacing between adjacent width adjustment plates 10 changes, the multiple transmission rods 28 remain connected and can rotate synchronously. When multiple transmission rods 28 rotate synchronously, multiple eccentric wheels 31 also rotate synchronously. When the distal end of the eccentric wheel 31 contacts the bottom of the lifting plate 33, it lifts the lifting plate 33. When the proximal end of the eccentric wheel 31 contacts the bottom of the lifting plate 33, the lifting plate 33 falls under the action of gravity. This creates a reciprocating up-and-down motion of the lifting plate 33, continuously pushing the PCB board and changing its posture until it can smoothly slide into the limiting channel. Furthermore, since there are multiple limiting channels, the probability of the PCB board falling into the limiting channel is increased, which helps to ensure the continuous and stable operation of the loading process. In addition, because adjacent eccentric wheels 31 have different angles, adjacent lifting plates 33 will not rise and fall synchronously. This avoids the situation where two lifting plates 33 simultaneously lift the flat PCB board, causing the PCB board to remain balanced and unable to change its orientation. Although the above method allows the PCB board's posture to be continuously changed until it falls into the limiting channel, if the PCB boards are concentrated in a localized area within the limiting frame 2, they will only fall into a limited range of limiting channels. Simultaneously, if the bottom PCB board has not yet fallen into the limiting channel in a suitable posture, the upper PCB board will also be unable to enter due to the jamming below, thus affecting loading efficiency. Therefore, to solve this problem, when the spacing of the width adjustment plate 10 changes, the adjacent worm gears 29 remain in an inserted state and can rotate synchronously. After the PCB board is placed above the width adjustment plate 10, the motor 4 drives one side of the worm gear 29 to rotate, causing multiple worm gears 29 to rotate synchronously. This causes the worm wheel 30 and friction roller 34 to rotate synchronously. The friction between the friction roller 34 and the PCB board disperses the PCB board within the limiting frame 2, reducing the PCB board stacking height. This facilitates the PCB board entering the limiting channel from multiple directions, improving the utilization rate of multiple limiting channels and further enhancing loading efficiency.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser precision SMT online marking device, comprising a base (1), characterized in that: A mounting platform (26) is fixedly connected to one side of the upper surface of the base (1). A laser marking machine body (27) is provided on the upper end of the mounting platform (26). A frame two (25) is fixedly connected to one side of the upper surface of the base (1). A conveyor belt one (3) is provided on the frame two (25). A PCB board loading assembly is also provided on the base (1). The PCB board loading assembly includes a frame (6) fixedly connected to one side of the upper surface of the base (1). A conveyor belt (24) is provided on the frame (6). A limit frame (2) is fixedly connected to one side of the upper end of the frame (6). Multiple width adjustment plates (10) are distributed horizontally and equidistantly at the sliding groove of the limit frame (2). The frontmost width adjustment plate (10) is fixedly connected to the limit frame (2), and the remaining width adjustment plates (10) are slidably connected to the limit frame (2). The bottom of the width adjustment plate (10) is in contact with the surface of the conveyor belt (24). A limit plate (8) is fixedly connected to one side of the upper end of the last width adjustment plate (10). A baffle (9) is slidably connected to the side. A baffle (21) is fixedly connected to one side of the upper end of the frame (6). The end of the width adjustment plate (10) is in contact with one side of the baffle (21). A transverse frame (4) is slidably set on one side of the upper end of the base (1) via an X-axis guide rail (5). A lifting frame (12) is slidably set on the transverse frame (4) via a Z-axis guide rail (13). A slider (15) is slidably set on one side of the lifting frame (12) via a Y-axis guide rail (14). A flip block (19) is rotatably set on one side of the bottom of the slider (15). A gripper cylinder (18) is rotatably set on one side of the lower end of the flip block (19).

2. The laser precision SMT online marking device according to claim 1, characterized in that: One end of the frontmost and rearmost width adjustment plates (10) is rotatably provided with a second connecting rod (32), and the other ends of the width adjustment plates (10) are rotatably provided with a first connecting rod (23). One end of the second connecting rod (32) is rotatably connected to one end of the first connecting rod (23), and the ends of two adjacent first connecting rods (23) are rotatably connected.

3. The laser precision SMT online marking device according to claim 2, characterized in that: The limiting frame (2) is fixedly connected to one side of an electric push rod (22), and the piston end of the electric push rod (22) is fixedly connected to one end of the last side width adjustment plate (10).

4. The laser precision SMT online marking device according to claim 1, characterized in that: An electric push rod (11) is fixedly connected to one side of the limiting frame (2), and the piston end of the electric push rod (11) is fixedly connected to one end of the baffle (9).

5. The laser precision SMT online marking device according to claim 1, characterized in that: A vision sensor (16) is fixedly installed on one side of the slider (15), and a motor (17) is fixedly connected to one side of the slider (15). The output end of the motor (17) is fixedly connected to one end of the flip block (19).

6. The laser precision SMT online marking device according to claim 1, characterized in that: The upper side of the flipping block (19) is fixedly connected to a motor (20), and the output end of the motor (20) is fixedly connected to one end of the gripper cylinder (18).

7. The laser precision SMT online marking device according to claim 1, characterized in that: It also includes drop-promoting components; The drop-promoting component includes friction rollers (34) rotatably disposed at both ends of the upper side of the width adjustment plate (10), and a lifting plate (33) is inserted into and slidably connected to one side of the upper end of the width adjustment plate (10).

8. The laser precision SMT online marking device according to claim 7, characterized in that: One end of the friction roller (34) is fixedly connected to a worm gear (30), and one end of the width adjustment plate (10) is rotatably provided with a worm (29). The ends of two adjacent worms (29) are inserted and slidably connected through keyways. The worm (29) and the worm gear (30) mesh with each other. One end of the width adjustment plate (10) is fixedly connected to a motor (7), and the output end of the motor (7) is fixedly connected to one end of the worm (29).

9. The laser precision SMT online marking device according to claim 7, characterized in that: A transmission rod (28) is rotatably provided on one side of the width adjustment plate (10), and an eccentric wheel (31) is fixedly sleeved on one side of the transmission rod (28). The eccentric wheel (31) is in contact with the bottom of the lifting plate (33), and the ends of two adjacent transmission rods (28) are inserted and slidably connected.

10. A laser precision SMT online marking device according to claim 9, characterized in that: One end of the width adjustment plate (10) on one side is fixedly connected to a motor three (35), and the output end of the motor three (35) is fixedly connected to one end of the transmission rod (28).

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