Dispensing device for PCB (Printed Circuit Board) processing

Abstract

The invention belongs to the technical field of circuit board processing, and discloses a dispensing device for PCB processing. Comprising a processing table, a mechanical moving arm is mounted at the top end of the processing table, an air cylinder is mounted at the top end of the mechanical moving arm, a dispensing head is mounted at the output end of the air cylinder, the concave plate is fixedly connected to the outer side of the dispensing head, a dripping box is arranged at the bottom end of the concave plate, and a belt is arranged in the dripping box. According to the device, through the structural design of the traction mechanism, the pressurizing mechanism and the belt, in the moving and resetting process of the dispensing head, dust on the surface of a circuit board is effectively removed through the pressurizing mechanism, the dispensing quality is improved, the traction mechanism drives the belt to be attached to and separated from the dispensing head, a glue outlet of the dispensing head is accurately controlled, and the dispensing quality is improved. And the dripping of glue is avoided, so that the cleanliness of the circuit board and the dispensing accuracy are ensured, and the production efficiency and the product quality are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board processing, and more specifically, to a glue dispensing device for PCB circuit board processing. Background Art

[0002] PCB, also known as printed circuit board, is an indispensable and important component in modern electronic devices. It is the carrier and support for the electrical connection of electronic components. The dispensing device used in PCB circuit board processing is an important equipment in the electronic manufacturing process. The dispensing device is a key link to ensure the quality of electronic component pasting and connection. Its accuracy and stability directly affect the overall performance and reliability of electronic products.

[0003] The existing dispensing devices are mostly composed of a processing table, a dispensing head, a guide rail, a mechanical motion arm and a cylinder, and their working principle is as follows: first, the circuit board to be dispensed is placed on the processing table, and then the mechanical motion arm drives the cylinder and the dispensing head to move along the guide rail. When the dispensing head moves to the dispensing position, the mechanical motion arm stops running. At this time, the cylinder controls the dispensing head to move down close to the dispensing position to prevent the dispensing head from being too high and causing glue splashing. The dispensing head then runs and evenly drips the glue inside it onto the circuit board. Then, the cylinder drives the dispensing head to move up and reset, making it convenient for the staff to observe the dispensing situation. Then, the above operation is repeated until the surface of the circuit board to be dispensed is evenly dotted with glue. Finally, the circuit board is removed to complete the dispensing operation.

[0004] The existing dispensing head moves up and resets after each dispensing, and moves to the next dispensing position. This process takes a certain amount of time. During this time, some glue at the bottom of the dispensing head may drip under the gravity and the potential energy of movement. This causes the position of the circuit board that should not be glued to be contaminated by glue, affecting its performance. Secondly, when there is dust on the surface of the circuit board, the glue will also be affected by the dust, resulting in unsatisfactory dispensing effect, thereby affecting product quality. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention proposes a glue dispensing device for PCB circuit board processing.

[0006] To achieve the above object, the present invention provides the following technical solution: a dispensing device for PCB circuit board processing, comprising a processing table, a mechanical motion arm is installed on the top of the processing table, a cylinder is installed on the top of the mechanical motion arm, and a dispensing head is installed on the output end of the cylinder, and further comprising: A concave plate, which is fixedly connected to the outside of the dispensing head, a drip box is arranged at the bottom end of the concave plate, a belt is arranged inside the drip box, and a traction mechanism for moving the drip box is arranged on the periphery of the concave plate; The bottom box is fixedly connected to the bottom end of the drip box, three groups of air outlet pipes are fixedly connected inside the bottom box, and a booster mechanism for increasing the air pressure inside the air outlet pipe is arranged on the periphery of the drip box.

[0007] Further, the traction mechanism includes a pair of limit rods, a connecting plate, a pair of springs, a traction rope, a fixed plate and a guide wheel, the pair of limit rods are fixedly connected to the outer side of the concave plate, the connecting plate is slidably connected to the outer side of the pair of limit rods, the connecting plate is fixedly connected to the drip box, the two ends of a pair of springs are respectively fixedly connected to the concave plate and the connecting plate, the traction rope is fixedly connected to the outer side of the drip box, the end of the traction rope away from the drip box is fixedly connected to the bottom end of the fixed plate, the fixed plate is fixed to the outer side of the mechanical motion arm, the guide wheel is fixedly connected to the bottom end of the fixed plate, and the guide wheel is in contact with the traction rope.

[0008] Furthermore, the boosting mechanism includes a pair of piston rods, a piston plate, a compression tube, an air transfer tube and a connecting frame, the pair of piston rods are fixedly connected to the bottom end of the bottom box, the piston plates are respectively fixedly connected to the ends of the pair of piston rods away from the bottom box, the compression tube is arranged on the outside of the piston plate, and the inside of the compression tube is adapted to the size of the piston plate, the air transfer tube is fixedly connected to the end of the compression tube away from the piston plate, and the end of the air transfer tube away from the compression tube is fixedly connected to the inside of the bottom box, the connecting frame is fixedly connected to the outside of the compression tube, and the end of the connecting frame away from the compression tube is fixedly connected to the outside of the drip box.

[0009] Furthermore, a pair of pulleys are meshed inside the belt, and both ends of the pair of pulleys are rotatably connected to the inner wall of the drip box. A connecting rod is fixedly connected to one end of the pulley, and the connecting rod passes through the drip box. A spur gear is fixedly connected to the outer side of the connecting rod, and a rack is meshed on the outer side of the spur gear. A moving mechanism for supporting and lifting the rack is provided on the periphery of the rack.

[0010] Further, the moving mechanism includes a pair of guide rods, a pair of guide frames, a diamond block, square plate one, an L plate and square plate two, the pair of guide rods are fixedly connected to the top of the rack, the pair of guide frames are respectively sleeved on the outside of the pair of guide rods, the pair of guide frames are fixedly connected to the concave plate, the diamond block is fixedly connected to the top of the guide rod, the square plate one is arranged on the outside of the diamond block, and the square plate one is in contact with the diamond block, the L plate is fixedly connected to the inner side of the concave plate, and the square plate two is fixedly connected to the side of the L plate away from the dispensing head.

[0011] Furthermore, the outer sides of the guide rod and the guide frame are respectively fixedly connected with magnetic suction cups, and a pair of the magnetic suction cups attract each other with opposite polarities.

[0012] Furthermore, a scraper is fixedly connected to the inner wall of the drip box, the scraper is in contact with the outer side of the belt, and a pull plate is slidably connected to the inside of the drip box.

[0013] The technical effects and advantages of the glue dispensing device for PCB circuit board processing of the present invention are as follows: (1) The present invention realizes that during the movement and resetting of the dispensing head, the booster mechanism effectively removes dust on the surface of the circuit board and improves the dispensing quality through the structural design of the traction mechanism, the booster mechanism and the belt, and the traction mechanism drives the belt and the dispensing head to fit and separate, accurately controls the glue outlet of the dispensing head, and avoids glue dripping, thereby ensuring the cleanliness of the circuit board and the accuracy of dispensing, greatly improving production efficiency and product quality.

[0014] (2) The present invention realizes dynamic adjustment of the contact point between the belt and the dispensing head through the structural design of the spur gear, the rack and the moving mechanism. When the drip box and the belt move, the spur gear moves and rotates along the outer side of the rack, and then drives the belt to rotate through the pulley to adjust the contact point between the belt and the dispensing head. When the rack moves to the limit distance, the rack is driven upward by the moving mechanism to disengage it from the meshing with the spur gear, ensuring that the belt will not rotate when resetting, thereby changing the contact position with the dispensing head. This design not only reduces the wear and failure rate of the belt, but also ensures the stability and consistency of the dispensing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the local structure in the present invention.

[0017] Figure 3 It is a schematic diagram of the fixed plate structure in the present invention.

[0018] Figure 4 It is a cross-sectional schematic diagram of the drip box in the present invention.

[0019] Figure 5 It is a schematic cross-sectional view of the compression tube in the present invention.

[0020] Figure 6 It is a cross-sectional schematic diagram of the bottom box in the present invention.

[0021] Figure 7 It is a schematic diagram of the connecting rod and spur gear structure in the present invention.

[0022] Figure 8 It is a schematic diagram of the structure of square plate 1 and square plate 2 in the present invention.

[0023] Fig. 9 It is a schematic diagram of the scraper and pull plate structure in the present invention.

[0024] In the figure: 1. Processing table; 2. Mechanical motion arm; 3. Cylinder; 4. Dispensing head; 5. Concave plate; 6. Drip box; 7. Belt; 8. Limit rod; 9. Connecting plate; 10. Spring; 11. Traction rope; 12. Fixed plate; 13. Guide wheel; 14. Bottom box; 15. Air outlet pipe; 16. Piston rod; 17. Piston plate; 18. Compression pipe; 19. Air transmission pipe; 20. Connecting frame; 21. Pulley; 22. Connecting rod; 23. Spur gear; 24. Rack; 25. Guide rod; 26. Guide frame; 27. Diamond block; 28. Square plate one; 29. ​​L plate; 30. Square plate two; 31. Magnetic suction cup; 32. Scraper; 33. Pull plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 - Figure 6 As shown, a glue dispensing device for PCB circuit board processing includes a processing table 1, a mechanical motion arm 2 is installed on the top of the processing table 1, a cylinder 3 is installed on the top of the mechanical motion arm 2, and a glue dispensing head 4 is installed at the output end of the cylinder 3, and also includes: The concave plate 5 is fixedly connected to the outer side of the dispensing head 4. A drip box 6 is arranged at the bottom end of the concave plate 5. A belt 7 is arranged inside the drip box 6. A traction mechanism for moving the drip box 6 is arranged at the periphery of the concave plate 5. The bottom box 14 is fixedly connected to the bottom end of the drip box 6 . Three groups of air outlet pipes 15 are fixedly connected inside the bottom box 14 . A booster mechanism for increasing the air pressure inside the air outlet pipes 15 is arranged on the periphery of the drip box 6 .

[0027] The existing glue dispensing head 4 moves up and resets after each glue dispensing is completed, and moves to the next glue dispensing position. This process requires a certain amount of time. During this time, some glue may drip from the bottom of the glue dispensing head 4 under the force of gravity and the potential energy of movement. This causes the position of the circuit board that should not be glued to be contaminated by glue, affecting its performance. Secondly, when there is dust on the surface of the circuit board, the glue will also be affected by the dust, resulting in unsatisfactory glue dispensing effect, thereby affecting product quality. When the embodiment of the present invention is used, the circuit board to be glued is first placed on the top of the processing table 1, and then the mechanical motion arm 2 drives the cylinder 3 and the glue dispensing head 4 to move to the specified position. Then, the cylinder 3 drives the glue dispensing head 4 to move downward, and when the glue dispensing head 4 moves downward, the glue dispensing head 4 will also drive the traction mechanism to operate through the concave plate 5, and the operation of the traction mechanism will drive the drip box 6 and the belt 7 to move horizontally. During the lateral movement of the drip box 6, the drip box 6 will drive the booster mechanism to operate. The pressure mechanism will increase the internal air pressure of the bottom box 14, and blow the internal air of the bottom box 14 to the surface of the circuit board through the three sets of air outlet pipes 15, so as to blow away the dust on the surface of the circuit board and improve the quality of glue dispensing. It should be noted that the air outlet pipe 15 is made of flexible material and can be swung to adjust to a suitable angle. The lateral movement of the belt 7 will break away from the fit with the bottom end of the glue dispensing head 4, and the glue dispensing head 4 can normally perform glue dispensing on the circuit board. When the glue dispensing head 4 finishes dispensing glue at a position on the circuit board, the cylinder 3 drives the glue dispensing head 4 to move upward, and the traction mechanism drives the drip box 6 and the belt 7 to move horizontally and reset. At this time, the belt 7 is again fitted to the bottom end of the glue dispensing head 4 to close the glue outlet of the glue dispensing head 4, thereby avoiding the glue at the bottom end of the glue dispensing head 4 from dripping. Through the above-mentioned structural design, not only the function of cleaning the dust on the surface of the circuit board is realized, but also the problem of random dripping of glue at the bottom end of the glue dispensing head 4 is solved.

[0028] like Figure 3 and Figure 4 As shown, the traction mechanism includes a pair of limit rods 8, a connecting plate 9, a pair of springs 10, a traction rope 11, a fixed plate 12 and a guide wheel 13. The pair of limit rods 8 are fixedly connected to the outer side of the concave plate 5, the connecting plate 9 is slidably connected to the outer side of the pair of limit rods 8, the connecting plate 9 is fixedly connected to the drip box 6, the two ends of the pair of springs 10 are respectively fixedly connected to the concave plate 5 and the connecting plate 9, the traction rope 11 is fixedly connected to the outer side of the drip box 6, the end of the traction rope 11 away from the drip box 6 is fixedly connected to the bottom end of the fixed plate 12, the fixed plate 12 is fixedly connected to the outer side of the mechanical motion arm 2, the guide wheel 13 is fixedly connected to the bottom end of the fixed plate 12, and the guide wheel 13 is in contact with the traction rope 11.

[0029] When the glue dispensing head 4 and the concave plate 5 move down, the drip box 6 will move down synchronously. At this time, the drip box 6 will pull the traction rope 11. Since the distance of the traction rope 11 is limited, the drip box 6 will move laterally with the downward distance. At this time, the drip box 6 will drive the connecting plate 9 to move along the outer side of the limit rod 8. The connecting plate 9 moves and then pulls a pair of springs 10, causing the springs 10 to deform and generate elastic potential energy. When the drip box 6 moves, it will also drive the belt 7 to move. The belt 7 will break away from the seal on the bottom end of the glue dispensing head 4, allowing the glue dispensing head 4 to operate normally. The guide wheel 13 guides the traction rope 11. When the glue dispensing head 4 and the concave plate 5 move up, the drip box 6 will gradually stop pulling the traction rope 11. The spring 10 will release its elastic potential energy at this time, and pull the drip box 6 to move horizontally and reset through the connecting plate 9. The lateral reset of the drip box 6 will drive the belt 7 to seal the bottom end of the glue dispensing head 4 again.

[0030] like Figure 5 and Figure 6 As shown, the boosting mechanism includes a pair of piston rods 16, a piston plate 17, a compression tube 18, an air transfer tube 19 and a connecting frame 20. The pair of piston rods 16 are fixedly connected to the bottom end of the bottom box 14, and the piston plates 17 are respectively fixedly connected to the ends of the pair of piston rods 16 away from the bottom box 14. The compression tube 18 is arranged on the outside of the piston plate 17, and the inside of the compression tube 18 is adapted to the size of the piston plate 17. The air transfer tube 19 is fixedly connected to the end of the compression tube 18 away from the piston plate 17, and the end of the air transfer tube 19 away from the compression tube 18 is fixedly connected to the inside of the bottom box 14. The connecting frame 20 is fixedly connected to the outside of the compression tube 18, and the end of the connecting frame 20 away from the compression tube 18 is fixedly connected to the outside of the drip box 6.

[0031] When the drip box 6 moves laterally, the drip box 6 will synchronously drive the bottom box 14 and the air outlet pipe 15 to move. When the bottom box 14 moves, the bottom box 14 will drive the piston plate 17 through the piston rod 16 to squeeze the internal air of the compression tube 18. When the internal air of the compression tube 18 is compressed, it will be transmitted to the inside of the bottom box 14 through the air transmission pipe 19. The bottom box 14 then transmits the internal air through three sets of air outlet pipes 15 and blows it toward the surface of the circuit board.

[0032] like Figure 7 and Figure 8 As shown, a pair of pulleys 21 are meshed inside the belt 7, and both ends of the pair of pulleys 21 are rotatably connected to the inner wall of the drip box 6. A connecting rod 22 is fixedly connected to one end of the pulley 21, and the connecting rod 22 passes through the drip box 6. A spur gear 23 is fixedly connected to the outer side of the connecting rod 22, and a rack 24 is meshed on the outer side of the spur gear 23. A moving mechanism for supporting and lifting the rack 24 is provided on the periphery of the rack 24.

[0033] Since the bottom end of the glue dispensing head 4 contacts the same position of the belt 7 each time, the belt 7 is subjected to too much glue, resulting in large friction and load. When the embodiment of the present invention is in use, each time the drip box 6 and the belt 7 move, the belt 7 will drive the spur gear 23 to move synchronously through the connecting rod 22, and the movement of the spur gear 23 will move along the outer side of the rack 24. As the spur gear 23 moves, when the spur gear 23 contacts the rack 24, the spur gear 23 will rotate, and the rotation of the spur gear 23 will drive the pulley 21 to rotate through the connecting rod 22, and the rotation of the pulley 21 will drive the belt 7 to rotate, thereby adjusting the belt 7 and the glue dispensing head 4. Contact point, when the rack 24 moves horizontally to the limit distance, the rack 24 just drives the rack 24 upward through the moving mechanism, so that the rack 24 is out of engagement with the spur gear 23. At this time, when the drip box 6 and the belt 7 are reset horizontally, the belt 7 will not rotate, thereby ensuring that the belt 7 changes the contact position with the dispensing head 4 after the reset. When the rack 24 is reset horizontally to the initial point, the rack 24 just drives the rack 24 downward through the moving mechanism, so that the rack 24 is engaged with the spur gear 23 again, ensuring that the next time the belt 7 moves horizontally, the above operation can be repeated to change the contact position between the belt 7 and the dispensing head 4.

[0034] like Figure 7 and Figure 8 As shown, the moving mechanism includes a pair of guide rods 25, a pair of guide frames 26, a diamond block 27, a square plate 1 28, an L plate 29 and a square plate 2 30. The pair of guide rods 25 are fixedly connected to the top of the rack 24, the pair of guide frames 26 are respectively sleeved on the outside of the pair of guide rods 25, the pair of guide frames 26 are fixedly connected to the concave plate 5, the diamond block 27 is fixedly connected to the top of the guide rod 25, the square plate 1 28 is arranged on the outside of the diamond block 27, and the square plate 1 28 is in contact with the diamond block 27, the L plate 29 is fixedly connected to the inner side of the concave plate 5, and the square plate 2 30 is fixedly connected to the side of the L plate 29 away from the dispensing head 4.

[0035] In the initial state, the spur gear 23 and the rack 24 are in meshing state, and the belt 7 will rotate along with the rotation of the spur gear 23. During the horizontal movement of the rack 24, the rack 24 will drive the lower half of the diamond block 27 to contact the square plate 2 30 through the guide rod 25. The diamond block 27 will move upward due to the squeezing of the square plate 2 30. When the diamond block 27 moves upward, it will drive the rack 24 to move upward through the guide rod 25, so that the rack 24 is out of mesh with the spur gear 23. At this time, the spur gear 23 will not drive the belt 7 during the horizontal resetting process. The belt 7 rotates to ensure that the belt 7 is in a stationary state. When the rack 24 moves horizontally to reset, the rack 24 will drive the upper part of the diamond block 27 to contact the square plate 28 through the guide rod 25. The diamond block 27 is squeezed by the square plate 28 and moves down to reset. When the diamond block 27 moves down, it will drive the rack 24 to mesh with the spur gear 23 again through the guide rod 25. It should be noted that the friction between the guide rod 25 and the guide frame 26 is sufficient to support the gravity of the rack 24, the guide rod 25 and the diamond block 27 after the rack 24 moves up.

[0036] like Figure 8 As shown, the outer sides of the guide rod 25 and the guide frame 26 are respectively fixedly connected to magnetic suction cups 31, and a pair of the magnetic suction cups 31 attract each other with opposite sexes.

[0037] A magnetic suction cup 31 is installed on the outer side of the guide frame 26 and the guide rod 25, which can be used in conjunction with the friction between the guide rod 25 and the guide frame 26. At this time, when the guide rod 25 moves upward, the pair of magnetic suction cups 31 are adsorbed against each other, which can further improve the stability of the guide rod 25 after it rises and avoid the guide rod 25 from falling.

[0038] like Figure 8 and Fig. 9 As shown, a scraper 32 is fixedly connected to the inner wall of the drip box 6 , and the scraper 32 is in contact with the outer side of the belt 7 . A pull plate 33 is slidably connected to the inside of the drip box 6 .

[0039] When the belt 7 rotates, the outer side of the belt 7 is in contact with the scraper 32. At this time, after the glue attached to the outer side of the belt 7 solidifies, it will be blocked by the scraper 32 and will be scraped off by the scraper 32. The scraped solidified glue will fall into the inside of the pull plate 33 under the action of gravity. The pull plate 33 is slidably connected to the inside of the drip box 6, which can facilitate the cleaning of the pull plate 33.

[0040] Working principle: First, place the circuit board to be glued on the top of the processing table 1, then, the mechanical motion arm 2 drives the cylinder 3 and the glue head 4 to move to the specified position, then, the cylinder 3 drives the glue head 4 to move downward, and when the glue head 4 moves downward, the glue head 4 will also drive the traction mechanism to operate through the concave plate 5, and the operation of the traction mechanism will drive the drip box 6 and the belt 7 to move horizontally. During the lateral movement of the drip box 6, the drip box 6 will drive the booster mechanism to operate, and the booster mechanism will increase the internal air pressure of the bottom box 14, and blow the internal air of the bottom box 14 to the surface of the circuit board through three sets of air outlet pipes 15, so as to blow away the dust on the surface of the circuit board and improve the quality of glue dispensing. It should be noted that the air outlet pipe 15 is flexible The material, the air outlet duct 15 can be swung to adjust to a suitable angle, and the belt 7 will be separated from the fit with the bottom end of the dispensing head 4 when it moves horizontally, and the dispensing head 4 can normally perform dispensing operations on the circuit board. When the dispensing head 4 finishes dispensing glue at a position on the circuit board, the cylinder 3 drives the dispensing head 4 to move up, and the dispensing head 4 moves up, and the traction mechanism drives the drip box 6 and the belt 7 to move horizontally to reset. At this time, the belt 7 is again fitted to the bottom end of the dispensing head 4, and the glue outlet of the dispensing head 4 is closed, thereby avoiding the glue at the bottom end of the dispensing head 4 from dripping. Through the above-mentioned structural design, not only the function of cleaning the dust on the surface of the circuit board is realized, but also the problem of random dripping of glue at the bottom end of the dispensing head 4 is solved; When the glue dispensing head 4 and the concave plate 5 move down, the drip box 6 will move down synchronously. At this time, the drip box 6 will pull the traction rope 11. Since the distance of the traction rope 11 is limited, the drip box 6 will move laterally with the downward distance. At this time, the drip box 6 will drive the connecting plate 9 to move along the outer side of the limit rod 8. The connecting plate 9 moves and then pulls a pair of springs 10, so that the springs 10 are deformed and generate elastic potential energy. When the drip box 6 moves, it will also drive the belt 7 to move. The belt 7 will break away from the seal on the bottom end of the glue dispensing head 4, so that the glue dispensing head 4 can operate normally. The guide wheel 13 guides the traction rope 11. When the glue dispensing head 4 and the concave plate 5 move up, the drip box 6 will gradually stop pulling the traction rope 11. The spring 10 will release the elastic potential energy at this time, and pull the drip box 6 to move horizontally and reset through the connecting plate 9. The lateral reset of the drip box 6 will drive the belt 7 to seal the bottom end of the glue dispensing head 4 again. When the drip box 6 moves horizontally, the drip box 6 will synchronously drive the bottom box 14 and the air outlet pipe 15 to move. When the bottom box 14 moves, the bottom box 14 will drive the piston plate 17 to squeeze the internal air of the compression pipe 18 through the piston rod 16. When the internal air of the compression pipe 18 is compressed, it will be transmitted to the inside of the bottom box 14 through the air transmission pipe 19. The bottom box 14 then transmits the internal air through the three sets of air outlet pipes 15 and blows it to the surface of the circuit board. Each time the drip box 6 and the belt 7 move, the belt 7 will drive the spur gear 23 to move synchronously through the connecting rod 22, and the spur gear 23 will move along the outside of the rack 24. As the spur gear 23 moves, the spur gear 23 will rotate when it contacts the rack 24. The rotation of the spur gear 23 will drive the pulley 21 to rotate through the connecting rod 22. The rotation of the pulley 21 will drive the belt 7 to rotate, thereby adjusting the contact point between the belt 7 and the dispensing head 4. When the rack 24 moves horizontally to the limit distance, the rack 24 just passes through the shift The moving mechanism drives the rack 24 to move upward, so that the rack 24 is out of mesh with the spur gear 23. At this time, when the drip box 6 and the belt 7 are reset horizontally, the belt 7 will not rotate, thereby ensuring that the contact position of the belt 7 with the dispensing head 4 is changed after the reset. When the rack 24 is reset horizontally to the initial point, the rack 24 just drives the rack 24 to move downward and reset through the moving mechanism, so that the rack 24 is meshed with the spur gear 23 again, ensuring that the next time the belt 7 moves horizontally, the above operation can be repeated to change the contact position of the belt 7 with the dispensing head 4. In the initial state, the spur gear 23 and the rack 24 are in meshing state, and the belt 7 will rotate along with the rotation of the spur gear 23. During the horizontal movement of the rack 24, the rack 24 will drive the lower half of the diamond block 27 to contact the square plate 2 30 through the guide rod 25. The diamond block 27 will move upward due to the squeezing of the square plate 2 30. When the diamond block 27 moves upward, it will drive the rack 24 to move upward through the guide rod 25, so that the rack 24 is out of mesh with the spur gear 23. At this time, the spur gear 23 will not drive the belt 7 during the horizontal resetting process. The belt 7 rotates to ensure that the belt 7 is in a stationary state. When the rack 24 moves horizontally to reset, the rack 24 will drive the upper half of the diamond block 27 to contact the square plate 1 28 through the guide rod 25. The diamond block 27 is squeezed by the square plate 1 28 and moves down to reset. The diamond block 27 moves down and drives the rack 24 to mesh with the spur gear 23 again through the guide rod 25. It should be noted that the friction between the guide rod 25 and the guide frame 26 is sufficient to support the gravity of the rack 24, the guide rod 25 and the diamond block 27 after the rack 24 moves up. A magnetic chuck 31 is installed on the outer side of the guide frame 26 and the guide rod 25, which can be used in conjunction with the friction between the guide rod 25 and the guide frame 26. At this time, when the guide rod 25 moves upward, the pair of magnetic chucks 31 are adsorbed, which can further improve the stability of the guide rod 25 after it rises, and prevent the guide rod 25 from falling. When the belt 7 rotates, the outer side of the belt 7 is in contact with the scraper 32. At this time, after the glue attached to the outer side of the belt 7 solidifies, it will be blocked by the scraper 32 and will be scraped off by the scraper 32. The scraped solidified glue will fall into the inside of the pull plate 33 under the action of gravity. The pull plate 33 is slidably connected to the inside of the drip box 6, which can facilitate the cleaning of the pull plate 33.

[0041] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A glue dispensing device for PCB circuit board processing, comprising a processing table (1), a mechanical motion arm (2) is installed on the top of the processing table (1), a cylinder (3) is installed on the top of the mechanical motion arm (2), and a glue dispensing head (4) is installed on the output end of the cylinder (3), characterized in that: Also includes: A concave plate (5), the concave plate (5) being fixedly connected to the outer side of the dispensing head (4), a dripping box (6) being arranged at the bottom end of the concave plate (5), a belt (7) being arranged inside the dripping box (6), and a traction mechanism for moving the dripping box (6) being arranged at the periphery of the concave plate (5); A bottom box (14), the bottom box (14) being fixedly connected to the bottom end of the drip box (6), three groups of air outlet pipes (15) being fixedly connected inside the bottom box (14), and a pressurizing mechanism for increasing the internal air pressure of the air outlet pipes (15) being arranged on the periphery of the drip box (6); A pair of pulleys (21) are meshed inside the belt (7), and both ends of the pair of pulleys (21) are rotatably connected to the inner wall of the drip box (6). A connecting rod (22) is fixedly connected to one end of the pulley (21), and the connecting rod (22) passes through the drip box (6). A spur gear (23) is fixedly connected to the outer side of the connecting rod (22), and a rack (24) is meshed on the outer side of the spur gear (23). A moving mechanism for supporting and lifting the rack (24) is arranged on the periphery of the rack (24).

2. The glue dispensing device for PCB circuit board processing according to claim 1, characterized in that: The traction mechanism comprises a pair of limit rods (8), a connecting plate (9), a pair of springs (10), a traction rope (11), a fixed plate (12) and a guide wheel (13). The pair of limit rods (8) are both fixedly connected to the outer side of the concave plate (5). The connecting plate (9) is slidably connected to the outer side of the pair of limit rods (8). The connecting plate (9) is fixedly connected to the drip box (6). The two ends of the pair of springs (10) are respectively fixedly connected to the concave plate (5) and the connecting plate (9). The traction rope (11) is fixedly connected to the outer side of the drip box (6). One end of the traction rope (11) away from the drip box (6) is fixedly connected to the bottom end of the fixed plate (12). The fixed plate (12) is fixedly connected to the outer side of the mechanical moving arm (2). The guide wheel (13) is fixedly connected to the bottom end of the fixed plate (12), and the guide wheel (13) is in close contact with the traction rope (11).

3. The glue dispensing device for PCB circuit board processing according to claim 2, characterized in that: The boosting mechanism comprises a pair of piston rods (16), a piston plate (17), a compression tube (18), an air transfer tube (19) and a connecting frame (20). The pair of piston rods (16) are fixedly connected to the bottom end of the bottom box (14). The piston plates (17) are respectively fixedly connected to the ends of the pair of piston rods (16) away from the bottom box (14). The compression tube (18) is arranged on the outside of the piston plate (17), and the inside of the compression tube (18) is adapted to the size of the piston plate (17). The air transfer tube (19) is fixedly connected to the end of the compression tube (18) away from the piston plate (17). The end of the air transfer tube (19) away from the compression tube (18) is fixedly connected to the inside of the bottom box (14). The connecting frame (20) is fixedly connected to the outside of the compression tube (18). The end of the connecting frame (20) away from the compression tube (18) is fixedly connected to the outside of the drip box (6).

4. The glue dispensing device for PCB circuit board processing according to claim 3 is characterized in that: The moving mechanism comprises a pair of guide rods (25), a pair of guide frames (26), a diamond block (27), a square plate 1 (28), an L plate (29) and a square plate 2 (30). The pair of guide rods (25) are fixedly connected to the top of the rack (24). The pair of guide frames (26) are respectively sleeved on the outside of the pair of guide rods (25). The pair of guide frames (26) are fixedly connected to the concave plate (5). The diamond block (27) is fixedly connected to the top of the guide rod (25). The square plate 1 (28) is arranged on the outside of the diamond block (27), and the square plate 1 (28) is in contact with the diamond block (27). The L plate (29) is fixedly connected to the inside of the concave plate (5). The square plate 2 (30) is fixedly connected to the side of the L plate (29) away from the dispensing head (4).

5. The glue dispensing device for PCB circuit board processing according to claim 4, characterized in that: The outer sides of the guide rod (25) and the guide frame (26) are respectively fixedly connected to magnetic suction cups (31), and the pair of magnetic suction cups (31) attract each other with opposite polarities.

6. The glue dispensing device for PCB circuit board processing according to claim 5, characterized in that: A scraper (32) is fixedly connected to the inner wall of the drip box (6), the scraper (32) is in contact with the outer side of the belt (7), and a pull plate (33) is slidably connected to the inside of the drip box (6).

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