A full-automatic chip mounter for circuit board

Abstract

The present application relates to the technical fields of circuit board chip mounter, and discloses a full-automatic circuit board chip mounter, which comprises a bearing frame, a suction nozzle assembly and a cleaning mechanism, the suction nozzle assembly comprises a shell frame, a piston rod and a suction nozzle head body, the suction nozzle assembly is fixedly arranged on an assembling plate, and is used for automatically adsorbing, taking and placing electronic components, the cleaning mechanism comprises a driven frame, a driving frame and a cleaning rod, the cleaning mechanism is arranged directly above the suction nozzle assembly, is used for periodically and automatically cleaning the suction nozzle assembly in normal working of the chip mounter, and is driven to move by a double-rod cylinder fixed to the bearing frame. The full-automatic circuit board chip mounter is different from the existing dismounting and cleaning working mode, can achieve the use purpose of periodically and automatically cleaning the suction nozzle in the normal working state of the chip mounter, and can achieve the use purpose of self-cleaning for the cleaning components in the mounting head mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of circuit board placement machines, specifically to a fully automatic circuit board placement machine. Background Technology

[0002] Circuit boards are electronic carriers that form precision conductive lines on an insulating substrate through etching or printing. They are used to support and connect various electronic components. As circuit boards develop towards miniaturization, high performance and high density integration, surface mount technology has become the core process of circuit board manufacturing. This process often requires the use of fully automatic chip mounters.

[0003] As an automated production equipment controlled by precision electromechanical systems, vision systems, and computers, a pick-and-place machine can pick up, accurately position, and reliably place electronic components at high speed during operation. It mainly includes a vision monitoring mechanism, a motion control mechanism, a feeding mechanism, and a placement head mechanism. As the core actuator of the pick-and-place machine, the placement head mechanism uses vacuum adsorption to pick up electronic components and perform subsequent reliable placement.

[0004] A search of the invention patent with authorization announcement number CN115334769B reveals an automatic alignment nozzle assembly for an SMT pick-and-place machine, comprising a base, a mounting body, a nozzle body, a cleaning mechanism, a collection mechanism, and a positioning mechanism. The mounting body is fixedly connected to the bottom of the base, and the nozzle body is rotatably connected to the outer wall of the mounting body via threads. The cleaning mechanism is disposed inside the nozzle body for cleaning the interior of the nozzle body, and the collection mechanism is disposed outside the nozzle body and extends to the inner wall of the base for collecting dust.

[0005] Based on the aforementioned patents, existing solutions, and practical application, the placement head mechanism in current circuit board pick-and-place machines still has some problems, such as:

[0006] The cleaning solution for the placement head mechanism in the aforementioned patent involves filtering dust from the gas being adsorbed through a filter screen during the adsorption process of the nozzle body, and then cleaning the dust on the inner wall of the filter screen with a cleaning rod to ensure the cleanliness of the gas being adsorbed and achieve the purpose of cleaning the nozzle body. However, in the aforementioned patent, the cleaning mechanism is placed inside the nozzle body, and the gas being adsorbed must pass through the nozzle before it can be filtered by the filter screen. This cleaning method cannot achieve the purpose of thoroughly cleaning the nozzle, and dust will still accumulate and adhere to the nozzle air passage. In addition, during the cleaning process of the cleaning rod cleaning the filter screen, dust will still flow back into the nozzle air passage, which also fails to achieve the purpose of thorough cleaning.

[0007] The existing cleaning solution for the placement head mechanism in a pick-and-place machine involves disassembling the nozzles in the placement head and cleaning them with specialized nozzle cleaning equipment. Compared to the aforementioned patent, although this method can achieve the goal of thoroughly cleaning the nozzles, it is more cumbersome in practice and cannot achieve the purpose of periodic automatic cleaning of the nozzles. Furthermore, it cannot perform automatic cleaning of the nozzles while the pick-and-place machine is operating normally.

[0008] Therefore, we propose a fully automatic chip mounter for circuit boards to solve the problems mentioned above. Summary of the Invention

[0009] The purpose of this invention is to provide a fully automatic chip mounter for circuit boards, so as to solve the problems mentioned in the background art, which are that the nozzle cannot be automatically cleaned under normal working conditions of the chip mounter, and the purpose of periodic automatic cleaning of the nozzle cannot be achieved, thus affecting the ease of operation.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic circuit board placement machine, comprising:

[0011] The support frame has an integrated assembly plate section evenly spaced on its lower side;

[0012] Also includes:

[0013] A suction nozzle assembly, which is fixedly mounted on the assembly plate, is used for the automatic adsorption and placement of electronic components.

[0014] The cleaning mechanism is located directly above the nozzle assembly. During normal operation of the pick-and-place machine, it is used for the periodic automatic cleaning of the nozzle assembly. The cleaning mechanism is driven by a double-rod cylinder fixed to the support frame.

[0015] Preferably, the suction nozzle assembly includes a housing frame, a piston rod, and a suction nozzle head body. The upper end of the housing frame is sealed and fixedly connected to a tube frame fixed to the assembly plate. A piston tube groove is provided on the lower side wall of the square cavity of the housing frame, and a piston rod that can slide on the housing frame is provided in the piston tube groove. A first spring is installed at the sliding connection between the piston rod and the spring frame, and the spring frame is fixedly connected to the lower end of the housing frame.

[0016] The piston rod has a removable and replaceable suction head body threadedly fixed to the lower end of the columnar rod portion. The suction port in the suction head body is sealed and connected to the rod cavity in the piston rod.

[0017] Preferably, the piston tube groove has a bottom air passage on its flat groove wall, and the bottom air passage is sealed and connected to the first auxiliary air passage opened on the assembly plate. The first auxiliary air passage is connected to the first main air passage opened in the support frame. The right opening of the first main air passage is connected to the first air supply pipe through a miniature solenoid valve.

[0018] Preferably, a side air passage is provided on the curved side wall of the piston tube groove, and the side air passage is sealed and connected to the second auxiliary air passage provided on the assembly plate. The second auxiliary air passage is connected to the second main air passage provided in the support frame. The left opening of the second main air passage is connected to the second air supply pipe through a miniature solenoid valve.

[0019] The side air passage is connected to the transverse air passage on the cylindrical head of the piston rod in a communicating manner, and the transverse air passage is connected to the rod cavity in the piston rod. A first sealing ring is provided above and below the transverse air passage and is snapped onto the cylindrical head in the piston rod.

[0020] Preferably, the cleaning mechanism includes a driven frame, an active frame, and a cleaning rod. The driven frame forms a sliding structure at the lower end of the cavity in the outer shell frame, and a tension spring is installed at the sliding connection between the two. The active frame is slidably connected to the upper end of the cavity in the outer shell frame, and a second spring is installed at the sliding connection between the two. A connecting plate for transmission is provided between the driven frame and the active frame, and the middle part of the connecting plate is rotatably connected to the cavity wall of the cavity in the outer shell frame. The left and right ends of the connecting plate are slidably connected to the pins in the driven frame and the active frame, respectively.

[0021] The active frame has a cleaning rod slidably connected inside the sleeve section, and a third spring is installed at the sliding connection between the two. The upper section of the cleaning rod is fixedly connected to the limiting end block fixed to the output end of the double-rod cylinder, and the cleaning rod and the limiting end block form a synchronous sliding structure in the circular tube cavity of the tube frame.

[0022] The middle section of the cleaning rod is fixed with a limiting ring, and the limiting ring is connected to the upper side frame wall of the active frame by pressing. The thin section of the lower part of the cleaning rod is covered with a dust-free cloth sleeve, and the cleaning rod and the dust-free cloth sleeve are connected to the rod cavity of the piston rod and the suction port of the nozzle head body by interlocking friction.

[0023] Preferably, a blocking member is flipped and connected inside the driven frame, and a torsion spring is installed at the flipped connection between the two. The baffle part of the blocking member is slidably connected to the first unlocking groove opened on the left side cavity wall of the square shell cavity in the outer shell frame, and the lower side groove wall of the first unlocking groove is set in an inclined state. A second sealing ring is fixedly connected to the round platform of the pressure plate part of the blocking member, and the round platform of the blocking member, together with the second sealing ring, is connected to the funnel-shaped opening on the piston tube groove by a sealing plug.

[0024] Preferably, a first locking member is slidably connected to the lower side frame wall of the driven frame, and a fourth spring is installed at the sliding connection between the two. The inwardly angled tongue end of the first locking member is connected to the pressure plate part of the blocking member by a snap-fit ​​method. The outward end of the first locking member is slidably connected to the second unlocking groove opened on the right side cavity wall of the square shell cavity in the outer shell frame, and the lower side groove wall of the second unlocking groove is set in an inclined state.

[0025] Preferably, a second locking member is slidably connected inside the limiting end cap of the sleeve section in the active frame, and a fifth spring is installed at the sliding connection between the two. The inward hemispherical end of the second locking member is connected to the cleaning rod by a snap-fit ​​method, and the outward hemispherical end of the second locking member is slidably connected to the third unlocking groove opened on the circular tube cavity in the tube frame. The upper side wall of the third unlocking groove is set in an inclined state.

[0026] Preferably, the thin rod body of the lower section of the cleaning rod has through openings at equal intervals that communicate with the rod cavity of the cleaning rod. The upper end of the rod cavity of the cleaning rod is connected and fixed to the lower end of the spring guide tube, and the upper end of the spring guide tube is connected and fixed to the third main air channel opened in the support frame. The left opening of the third main air channel is connected to the third air supply pipe through a micro solenoid valve, and the right opening of the third main air channel is connected to the liquid supply pipe through a micro solenoid valve.

[0027] Preferably, the thin rod of the lower section of the cleaning rod is correspondingly provided with the dust hood, and the dust hood is sealed and fixed to the dust removal port in the outer shell frame. Air is supplied to the rod cavity of the cleaning rod through the third air supply pipe, and the dust-free cloth cover is self-cleaned in conjunction with the removal of the dust hood.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the fully automatic board placement machine achieves the purpose of periodically and automatically cleaning the nozzles under normal working conditions, ensuring ease of operation; in addition, the cleaning components inside the placement head mechanism achieve self-cleaning, ensuring the cleanliness of the cleaning.

[0029] 1. After the cleaning rod is installed, it is on the same vertical central axis as the piston rod. The thin rod of the lower section of the cleaning rod is wrapped with a lint-free cloth sleeve. After the cleaning rod is driven to move, the thin rod of the lower section of the cleaning rod, together with the lint-free cloth sleeve, rubs and penetrates through the rod cavity of the piston rod and the suction port of the nozzle head body, realizing the periodic automatic cleaning of the placement head mechanism in the pick-and-place machine. In addition, through the conduction of the third main air channel and the spring guide tube, the liquid supply pipe supplies alcohol to the rod cavity of the cleaning rod, and through the through port, the alcohol fills the lint-free cloth sleeve. When the lint-free cloth sleeve rubs and penetrates through the rod cavity of the piston rod and the suction port of the nozzle head body, the alcohol filling the lint-free cloth sleeve achieves the purpose of alcohol wiping and ensures the cleanliness of the cleaning.

[0030] Furthermore, through the locking action of the second locking member, when the cleaning rod initially moves downward, it drives the active frame to move downward synchronously. Utilizing the linkage between the active frame, the connecting plate, and the driven frame, the driven frame moves upward in the opposite direction to the active frame. By utilizing the cooperation between the second unlocking slot and the first locking member, the blocking member is unlocked. Then, by utilizing the cooperation between the first unlocking slot and the blocking member, the blocking member flips and unfolds its truncated cone to release the blockage at the flared opening in the piston tube groove. Through the setting of the linkage structure, the placement head mechanism in this pick-and-place machine can freely switch from the electronic component picking working state to the automatic cleaning working state. This is different from the existing disassembly and cleaning working method. Under the normal working state of the pick-and-place machine, it achieves the purpose of periodic automatic cleaning of the nozzle, ensuring ease of operation.

[0031] 2. Through the conduction of the third main air passage and the spring guide tube, the third air supply pipe supplies air to the rod cavity of the cleaning rod, and blows the high-pressure airflow onto the cleanroom cover through the through port. The blocking part flips and closes, and the truncated cone blocks the funnel-shaped opening in the piston tube groove, so that the square shell cavity of the outer shell frame forms an independent cleaning chamber. The high-pressure airflow blows out the dust adsorbed and retained on the cleanroom cover, achieving the purpose of self-cleaning of the cleanroom cover. In conjunction with the dust suction hood, the blown-out dust is extracted and collected to avoid the adsorbed and retained dust affecting the next cleaning.

[0032] Furthermore, after removing the limiting ring through the replacement port in the outer casing, the cleaning rod can be removed from the casing by pulling it out, making it easy to replace. In addition, by unscrewing the end cap on the cleaning rod, the lint-free cloth can also be easily removed and replaced. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 This is a three-dimensional structural diagram of the disassembled side cross-section of the tube frame and assembly plate of the present invention;

[0035] Figure 3 This is a frontal cross-sectional three-dimensional structural diagram of the cleaning mechanism of the present invention;

[0036] Figure 4 This is a frontal cross-sectional three-dimensional structural diagram of the suction nozzle assembly of the present invention;

[0037] Figure 5 This is a side view cross-sectional three-dimensional structural diagram of the connection between the piston tube groove and the bottom air passage of the present invention;

[0038] Figure 6 This is a frontal cross-sectional three-dimensional structural diagram of the connection between the first auxiliary airway and the first main airway of the present invention;

[0039] Figure 7 This is a side cross-sectional three-dimensional structural diagram of the connection between the piston tube groove and the side air passage of the present invention;

[0040] Figure 8 This is a frontal cross-sectional three-dimensional structural diagram of the connection between the second auxiliary airway and the second main airway of the present invention.

[0041] Figure 9 This is a front cross-sectional three-dimensional structural diagram of the connection between the driven frame and the blocking member of the present invention;

[0042] Figure 10 This is a three-dimensional structural diagram of the blocking member and the first locking member of the present invention, viewed from below.

[0043] Figure 11 This is a frontal cross-sectional three-dimensional structural diagram of the connection between the driven frame and the active frame of the present invention;

[0044] Figure 12 This is a side cross-sectional three-dimensional structural diagram of the connection between the active frame and the cleaning rod of the present invention;

[0045] Figure 13 This is a frontal perspective three-dimensional structural diagram of the connection between the cleaning rod and the piston rod of the present invention;

[0046] Figure 14 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0047] Figure 15 This is a side cross-sectional three-dimensional structural diagram of the connection between the cleaning rod and the dust-free cloth cover of the present invention;

[0048] Figure 16 This is a frontal cross-sectional three-dimensional structural diagram of the connection between the third main air passage and the spring duct of the present invention.

[0049] In the diagram: 1. Support frame; 101. Assembly plate; 1011. First auxiliary air duct; 1012. Second auxiliary air duct; 102. First main air duct; 103. Second main air duct; 104. Third main air duct; 2. Nozzle assembly; 3. Cleaning mechanism; 4. Double-rod cylinder; 5. Outer shell frame; 501. First unlocking slot; 502. Second unlocking slot; 6. Tube shell frame; 601. Third unlocking slot; 7. Piston tube groove; 701. Bottom air duct; 702. Side air duct; 8. Piston rod; 801. Lateral air duct; 802. First sealing ring; 9. Spring frame; 10. First spring; 11. Nozzle head 12. Body; 13. Miniature solenoid valve; 14. First air supply pipe; 15. Second air supply pipe; 16. Driven frame; 17. Tension spring; 18. Active frame; 19. Second spring; 20. Linkage lever; 20. Cleaning rod; 2001. Through port; 21. Third spring; 22. Limiting end block; 23. Limiting ring; 24. Cleanroom cloth cover; 25. Blocking component; 2501. Second sealing ring; 26. Torsion spring; 27. First locking component; 28. Fourth spring; 29. ​​Second locking component; 30. Fifth spring; 31. Spring guide tube; 32. Third air supply pipe; 33. Liquid supply pipe; 34. Dust suction hood. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0051] Example 1:

[0052] This invention provides a technical solution: a fully automatic chip mounter for circuit boards, which addresses the problem that the chip mounter cannot achieve the purpose of periodically and automatically cleaning the nozzles under normal working conditions, thus affecting the ease of operation. The cleaning mechanism 3 is positioned directly above the nozzle assembly 2, and is driven by a double-rod cylinder 4 to move, thereby periodically and automatically cleaning the nozzle assembly 2.

[0053] This technical solution: Please refer to Figures 1-13 A fully automatic chip mounter for circuit boards, the fully automatic chip mounter for circuit boards mainly relates to the mounting head mechanism in the chip mounter, including a carrier frame 1, with an integrated connecting plate portion provided at both the left and right ends of the rear side of the carrier frame 1, wherein the connecting plate portion is fixedly mounted on the chip mounter by bolts, and an integrated assembly plate portion 101 is provided at equal intervals on the lower side of the carrier frame 1.

[0054] It also includes a nozzle assembly 2 and a cleaning mechanism 3. The nozzle assembly 2 is fixedly mounted on the assembly plate 101 and is arranged in a parallel state with the assembly plate 101. Each assembly plate 101 is equipped with a corresponding nozzle assembly 2. That is, the nozzle assemblies 2 are arranged vertically downwards at equal intervals on the support frame 1. The nozzle assembly 2 is used for automatic adsorption and placement of electronic components. The cleaning mechanism 3 is located directly above the nozzle assembly 2. Each nozzle assembly 2 is equipped with a corresponding cleaning mechanism 3. During normal operation of the pick-and-place machine, the cleaning mechanism 3 is used for periodic automatic cleaning of the nozzle assembly 2. The cleaning mechanism 3 is driven by a double-rod cylinder 4 fixed on the support frame 1.

[0055] Specifically, in this technical solution, the suction nozzle assembly 2 includes a housing frame 5, a piston rod 8, and a suction nozzle head body 11. The suction nozzle assembly 2 is fixedly mounted on the assembly plate 101. The suction nozzle assembly 2 performs automatic adsorption and placement operations on electronic components. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, since a sealing gasket is provided at the connection between the tube frame 6 and the outer shell frame 5, after the tube frame 6 is installed, its lower end, together with the sealing gasket, overlaps and is fixedly connected to the upper end of the outer shell frame 5 by bolts. Since the assembly plate part 101 is an integrated structure set on the lower side of the support frame 1, in a vertically downward state, after the tube frame 6 is installed, it is inserted and fixedly connected to the middle section plate of the assembly plate part 101 by bolts. Furthermore, since both the upper and lower ends of the left shell wall of the outer shell frame 5 are provided with an integrated connecting plate part, bolts are used to fix the connection between two adjacent outer shell frames 5 through the connecting plate parts, thus completing the fixed installation of the outer shell frame 5 and the tube frame 6 on the assembly plate part 101.

[0056] Since the first auxiliary air passage 1011 is located on the assembly plate 101, the middle of the support frame 1 is provided with a first main air passage 102 that communicates with the first auxiliary air passage 1011. The first main air passage 102 is used for the synchronous connection of multiple first auxiliary air passages 1011. Since the first main air passage 102 is a one-way channel with an opening on the right side, the right opening of the first main air passage 102 is connected to a first air supply pipe 13 through a miniature solenoid valve 12. The first air supply pipe 13 is connected to an air supply device that can perform air extraction or air filling (the air supply device is prior art and is not described in the attached drawings). When the miniature solenoid valve 12 on the first air supply pipe 13 is opened, the air supply device performs air extraction in the first main air passage 102 through the first air supply pipe 13, and performs air extraction in the first auxiliary air passage 1011 through the first main air passage 102.

[0057] Since the piston tube groove 7 has a groove wall consisting of curved groove walls and flat groove walls, the bottom air passage 701 is opened on the flat groove wall of the piston tube groove 7 and is symmetrically arranged about the central axis of the piston tube groove 7. The first auxiliary air passage 1011 is symmetrically arranged about the central axis of the mounting plate portion 101. The two first auxiliary air passages 1011 correspond to the two bottom air passages 701 respectively. Since the bottom air passage 701 extends from the flat groove wall of the piston tube groove 7 to the rear side wall of the outer casing frame 5, the first auxiliary air passage 1011 extends from inside the support frame 1 along the mounting plate portion 101. After passing through the assembly plate 101, it is placed at the lower end of the assembly plate 101. After the assembly plate 101 is placed, its lower end is fixedly connected to the rear side wall of the outer casing 5 by bolts. A sealing ring is provided at the joint between the first auxiliary air passage 1011 and the bottom air passage 701. The bottom air passage 701 and the first auxiliary air passage 1011 are sealed and connected. After the first auxiliary air passage 1011 is evacuated, the bottom air passage 701 is evacuated through the first auxiliary air passage 1011, and the piston tube groove 7 is evacuated through the bottom air passage 701.

[0058] Since the outer shell frame 5 is hollow and has a square shell cavity, the piston tube groove 7 is opened on the lower shell cavity wall of the square shell cavity in the outer shell frame 5. The piston tube groove 7 is provided with a piston rod 8. The piston rod 8 is composed of two parts: a cylindrical head and a square columnar rod. The cylindrical head is placed at the upper end of the square columnar rod, and the two are on the same central axis. After the piston rod 8 is installed, the cylindrical head is movably inserted into the piston tube groove 7, and the square columnar rod is movably inserted through the lower shell cavity wall of the square shell cavity in the outer shell frame 5 and extends outward. Furthermore, the middle part of the square columnar rod of the piston rod 8 is sleeved and fixedly connected to a limiting plate by bolts. Through the special structural setting of the square columnar rod of the piston rod 8 and the limiting plate in the piston rod 8, the piston rod 8 is positioned on the outer shell frame 5 in a movable state.

[0059] Because a first sealing ring 802 is fixedly snapped onto the cylindrical head of the piston rod 8, and the first sealing ring 802 is placed and adheres to the curved groove wall of the piston tube groove 7, the cylindrical head of the piston rod 8 and the piston tube groove 7 are sealed by the first sealing ring 802. Also, because a sealing ring is provided at the insertion connection between the square columnar rod part of the piston rod 8 and the outer shell frame 5, the sliding connection between the square columnar rod part of the piston rod 8 and the outer shell frame 5 is sealed, making the piston tube groove 7 a sealed chamber. After the piston tube groove 7 is evacuated, it is in a negative pressure state, which causes the cylindrical head of the piston rod 8 to slide downward in the piston tube groove 7, and the square columnar rod part to slide downward in the outer shell frame 5.

[0060] Since the lower end of the columnar rod of the piston rod 8 is threadedly fixed to a removable and replaceable nozzle head body 11, when the pick-and-place machine is in operation, the nozzle head body 11 is positioned directly above the electronic component. After the piston rod 8 is driven to slide downward, the nozzle head body 11 is docked with the electronic component.

[0061] Since the piston rod 8 is hollow, that is, a rod cavity is opened at its vertical central axis, the transverse air passage 801 is opened in the middle of the cylindrical head of the piston rod 8, its front end is connected to the rod cavity in the piston rod 8, and its rear end is open with an opening. Since the side air passage 702 is opened on the curved side wall of the piston tube groove 7, after the piston rod 8 is driven to slide downward, the distance between the transverse air passage 801 and the side air passage 702 is equal to the maximum sliding distance of the piston rod 8. The transverse air passage 801 and the side air passage 702 correspond to each other, so that the two are connected in a connected manner.

[0062] Since the transverse air passage 801 is provided with first sealing rings 802 that are snapped onto the cylindrical head of the piston rod 8 above and below, and the two first sealing rings 802 are respectively placed on the upper and lower sides of the transverse air passage 801, when the transverse air passage 801 and the side air passage 702 are connected, the two first sealing rings 802 are used to seal the connection between the transverse air passage 801 and the side air passage 702.

[0063] Since the second auxiliary air passage 1012 is located on the assembly plate 101 between the two first auxiliary air passages 1011, a second main air passage 103 connected to the second auxiliary air passage 1012 is provided at the rear end of the support frame 1. The second main air passage 103 is used for the synchronous connection of multiple second auxiliary air passages 1012. Since the second main air passage 103 is a unidirectional channel with an opening on the left side, the left opening of the second main air passage 103 is connected to a second air supply pipe 14 through a miniature solenoid valve 12. The second air supply pipe 14 is connected to the air supply. The equipment can perform air extraction or air filling (the air supply equipment is existing technology and is not described in the accompanying drawings). At this time, the micro solenoid valve 12 on the first air supply pipe 13 is closed to keep the piston groove 7 under negative pressure, that is, to keep the piston rod 8 in a downward sliding state. The micro solenoid valve 12 on the second air supply pipe 14 is opened, and the air supply equipment extracts air from the second main air passage 103 through the second air supply pipe 14, and extracts air from the second auxiliary air passage 1012 through the second main air passage 103.

[0064] Since the side air passage 702 extends from the curved side wall of the piston tube groove 7 to the rear side wall of the housing frame 5, the second auxiliary air passage 1012 extends from the inside of the support frame 1 along the mounting plate portion 101, passes through the mounting plate portion 101 and is placed at the lower end of the mounting plate portion 101. Since the lower end of the mounting plate portion 101 is fixed to the rear side wall of the housing frame 5, a sealing ring is provided at the joint between the second auxiliary air passage 1012 and the side air passage 702. The side air passage 702 and the second auxiliary air passage 1012 are sealed and connected. After the second auxiliary air passage 1012 is evacuated, the air passage 1012 evacuates the side air passage 702 and the side air passage 702 evacuates the transverse air passage 801.

[0065] Since the rod cavity in the piston rod 8 is arranged in a vertically through state, the upper end of the rod cavity is located on the upper side of the cylindrical head in the piston rod 8, and the lower end of the rod cavity is located on the lower side of the square rod in the piston rod 8. When the suction nozzle assembly 2 is in operation, the blocking member 25, together with the second sealing ring 2501, seals and plugs the flared opening of the piston tube groove 7. Through the sealing effect of the second sealing ring 2501 and the sealing effect of the first sealing ring 802, they cooperate to seal the upper end of the rod cavity in the piston rod 8, so that the rod cavity in the piston rod 8 is a one-way channel with the lower opening at this time.

[0066] Since the nozzle head body 11 is hollow and has a through-hole, after the nozzle head body 11 is installed, the suction port is sealed and connected to the rod cavity of the piston rod 8. After the transverse air passage 801 is pumped, a negative pressure cavity is formed in the rod cavity of the piston rod 8 and the suction port of the nozzle head body 11. After the nozzle head body 11 is connected to the electronic components, the automatic adsorption and pickup of the electronic components is completed through the nozzle head body 11.

[0067] Conversely, the gas supply device inflates the electronic components via the second gas supply pipe 14. After passing through the second main air channel 103, the second auxiliary air channel 1012, the side air channel 702, and the transverse air channel 801, the negative pressure cavity in the piston rod 8 is released, causing the suction head body 11 to release its suction of the electronic components. In addition, the gas supply device inflates the electronic components via the first gas supply pipe 13. After passing through the first main air channel 102, the first auxiliary air channel 1011, and the bottom air channel 701, the negative pressure cavity in the piston tube groove 7 is released, causing the piston rod 8 to slide upwards and the suction head body 11 to separate from the electronic components, thus completing the automatic release and placement of the electronic components.

[0068] Meanwhile, in the above technical solutions, according to Figure 3 and Figure 4As shown, after the spring frame 9 is installed, it is fixedly connected to the outer shell wall at the lower end of the outer shell frame 5 by bolts. The frame body and the outwardly protruding section of the square columnar rod of the piston rod 8 are movably connected together. Also, a first spring 10 is installed at the sliding connection between the piston rod 8 and the spring frame 9. After the first spring 10 is installed, it is movably sleeved on the outside of the square columnar rod of the piston rod 8. One end of the first spring 10 presses against the limiting plate in the piston rod 8, and the other end of the first spring 10 presses against the frame body in the spring frame 9. When the piston rod 8 is driven to slide downward, the first spring 10 is compressed and undergoes elastic deformation. When the piston rod 8 slides upward to reset, the elastic deformation of the first spring 10 is used to reset, assisting the piston rod 8 to slide upward to reset.

[0069] Specifically, in this technical solution, the cleaning mechanism 3 includes a driven frame 15, an active frame 17, and a cleaning rod 20. The cleaning mechanism 3 is positioned directly above the nozzle assembly 2. During normal operation of the pick-and-place machine, the cleaning mechanism 3 performs periodic automatic cleaning operations on the nozzle assembly 2. Figure 1 , Figure 3 , Figure 4 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown, the double-rod cylinder 4 synchronously drives multiple cleaning mechanisms 3 to move. After the double-rod cylinder 4 is installed, it is fixedly connected to the support frame 1 by bolts. The output end moves through the support frame 1 in a vertically downward state. Since the tube frame 6 is hollow and has a circular cavity, a sliding groove is opened on its front side to communicate with the circular cavity. Since the output end of the double-rod cylinder 4 is sleeved and fixedly connected to the connecting horizontal plate by bolts, the front side of the limiting end block 22 is provided with an integrated block. After the limiting end block 22 is installed, the front block moves through the sliding groove in the tube frame 6, and the front block is locked and fixedly connected to the connecting horizontal plate in the double-rod cylinder 4 by bolts. The double-rod cylinder 4 is started to extend and operate, pushing the limiting end block 22 to move.

[0070] Since the limiting end block 22 is installed and movably locked in the circular cavity of the tube frame 6, and it is sleeved and fixedly connected to the upper section of the cleaning rod 20 by bolts, the limiting end block 22 and the cleaning rod 20 form a synchronous movement structure. When the limiting end block 22 is driven, it slides downward in the circular cavity of the tube frame 6, and the limiting end block 22 and the cleaning rod 20 slide downward synchronously in the circular cavity of the tube frame 6.

[0071] In the initial state, the connection between the sleeve part of the active frame 17 and the cleaning rod 20 is locked together by the locking action of the second locking piece 29. When the cleaning rod 20 is driven to slide downward initially, it drives the active frame 17 to move downward synchronously.

[0072] Since the circular cavity in the tube frame 6 is connected to the square cavity in the outer shell frame 5, and since the active frame 17 is a square frame structure, an integrated sleeve is vertically and upwardly arranged in the middle of its upper frame wall. The upper end of the sleeve is fitted with and fixedly connected to a limiting end cap by bolts. After the active frame 17 is installed, it is movably locked in the upper end of the square cavity in the outer shell frame 5. The sleeve moves through the upper cavity wall of the square cavity in the outer shell frame 5, and the sleeve, together with the limiting end cap, is movably inserted into the circular cavity in the tube frame 6, so that the active frame 17 is in a movable state and positioned in the outer shell frame 5. When the active frame 17 is driven, it slides downward at the upper end of the square cavity in the outer shell frame 5.

[0073] Since a second spring 18 is installed at the sliding connection between the outer shell frame 5 and the active frame 17, the second spring 18 is movably sleeved outside the sleeve part of the active frame 17 after being installed. One end of the spring 18 presses against the limiting end cap of the sleeve part of the active frame 17, and the other end of the spring 18 presses against the cavity wall of the circular tube cavity in the shell frame 6. After the active frame 17 is driven to slide downward, the second spring 18 is squeezed and undergoes elastic deformation.

[0074] Since the driven frame 15 is set in a square frame structure, the front and rear side frame walls are respectively provided with sliding grooves that are adapted to the front and rear side frame walls of the active frame 17. After the active frame 17 is installed, the front and rear side frame walls are respectively movably inserted into the sliding grooves of the front and rear side frame walls of the driven frame 15, so that the driven frame 15 is positioned in a movable state directly below the active frame 17. Furthermore, since the connection between the front side frame wall of the active frame 17 and the front side frame wall of the driven frame 15 and the connection between the rear side frame wall of the active frame 17 and the rear side frame wall of the driven frame 15 are both provided with linkage plates 19, the active frame 17 and the driven frame 15 form a linkage structure through the transmission of the linkage plates 19.

[0075] Because the middle of the linkage plate 19 is rotatably connected to a shaft, after it is installed, the shaft is snapped and fixed to the cavity wall of the square shell cavity in the outer shell frame 5 by bolts, so that the linkage plate 19 is positioned in a movable state on the outer shell frame 5. Also, because the front and rear frame walls of the active frame 17 are vertically provided with integrated pins, the front and rear pins correspond to the front and rear linkage plates 19 respectively. The right end of the linkage plate 19 is provided with a through groove. The pin in the active frame 17 is movably inserted into the groove at the right end of the linkage plate 19. The two form a sliding structure. After the active frame 17 is driven to slide downward, the linkage plate 19 is pushed to move by the sliding action between the right end of the linkage plate 19 and the pin in the active frame 17, so that the linkage plate 19 rotates on the cavity wall of the square shell cavity in the outer shell frame 5.

[0076] Because the lower cavity wall of the square cavity of the outer shell frame 5 is provided with a spring compartment, the spring compartment is symmetrically arranged about the central axis of the piston tube groove 7. Also, because both ends of the lower frame wall of the driven frame 15 are vertically downwardly provided with an integrated guide rod part, the lower end of the guide rod part is sleeved and fixedly connected with a limit cap by bolts. After the driven frame 15 is installed, it is movably locked in the lower end of the square cavity of the outer shell frame 5. Two of the guide rod parts, together with the limit caps, are movably inserted into the two spring compartments in the outer shell frame 5, so that the driven frame 15 is positioned in a movable state in the outer shell frame 5.

[0077] Since the driven frame 15 has integrated pins vertically installed on both the front and rear frame walls, with the front and rear pins corresponding to the front and rear connecting plates 19 respectively, and since the left end of the connecting plate 19 has a through groove, the pins in the driven frame 15 are movably inserted into the groove at the left end of the connecting plate 19, forming a sliding structure. After the connecting plate 19 is pushed and rotated, the driven frame 15 is pulled upward at the lower end of the cavity in the outer shell frame 5 by the sliding action between the left end of the connecting plate 19 and the pins in the driven frame 15, and the sliding direction of the driven frame 15 is opposite to the sliding direction of the active frame 17.

[0078] Since a tension spring 16 is installed at the sliding connection between the driven frame 15 and the outer shell 5, the tension spring 16 is symmetrically arranged about the central axis of the driven frame 15. After the tension spring 16 is installed, it is movably inserted into the spring compartment in the outer shell 5. One end of the tension spring 16 is fixedly connected to the limit cap of the guide rod in the driven frame 15, and the other end is fixedly connected to the spring compartment wall in the outer shell 5 by bolts. When the driven frame 15 is driven to slide upward, the tension spring 16 is pulled and undergoes elastic deformation.

[0079] Since the positions of the first unlocking slot 501 and the second unlocking slot 502 are offset vertically, when the driven frame 15 is driven to slide upward initially, the first locking member 27 is first engaged with the second unlocking slot 502, that is, the first locking member 27 releases the locking of the blocking member 25. At this time, the blocking member 25 is still in a flipped closed state. Only after the driven frame 15 is driven to slide upward continuously will the blocking member 25 engage with the first unlocking slot 501, and the blocking member 25 can be operated to flip and unfold on the driven frame 15.

[0080] Since the end of the first locking member 27 facing the blocking member 25 is the inward end, and the end away from the blocking member 25 is the outward end, the inward end of the first locking member 27 is set with a slanted tongue end structure. Since the front and rear sides of the middle of the first locking member 27 are provided with integrated positioning blocks, after the first locking member 27 is installed, the positioning blocks therein are movably locked in the lower frame wall of the driven frame 15. The inward end of the first locking member 27 moves through the lower frame wall of the driven frame 15 and extends into the groove of the lower frame wall of the driven frame 15. The outward end of the first locking member 27 moves through the lower frame wall of the driven frame 15 and extends outward, so that the first locking member 27 is positioned on the driven frame 15 in a movable state.

[0081] Since a fourth spring 28 is installed at the sliding connection between the driven frame 15 and the first locking member 27, the fourth spring 28 is symmetrically arranged about the horizontal central axis of the first locking member 27. One end of the spring 28 presses against the positioning block in the first locking member 27, and the other end presses against the lower frame wall of the driven frame 15. Since the first locking member 27 and the blocking member 25 are locked in the initial state, the fourth spring 28 is compressed and undergoes elastic deformation.

[0082] Since the second unlocking groove 502 is opened on the right side cavity wall of the outer shell frame 5, and the width of the second unlocking groove 502 is greater than the width of the first locking member 27, when the driven frame 15 is driven to slide upward initially, the outward end of the first locking member 27 corresponds to the second unlocking groove 502. After the outward end of the first locking member 27 loses its limiting obstruction, it is reset by the elastic deformation of the fourth spring 28, so that the first locking member 27 extends and slides in the lower frame wall of the driven frame 15, and the inward oblique tongue end of the first locking member 27 loses its engagement connection with the pressure plate part of the blocking member 25, that is, the locking of the blocking member 25 on the driven frame 15 is released.

[0083] Since the lower end of the left frame wall and the lower side frame wall of the driven frame 15 are provided with through slots, and since the longitudinal section of the blocking member 25 is set in an "L" shape, divided into a transverse plate and a longitudinal plate, the longitudinal plate is a baffle part and the transverse plate is a pressure plate part, and since the corner of the blocking member 25 is inserted and rotatably connected with a shaft column, after the blocking member 25 is installed, the baffle part is movably locked in the slot of the left frame wall of the driven frame 15, and the pressure plate part is movably locked in the slot of the lower frame wall of the driven frame 15. Furthermore, the two ends of the shaft column are respectively inserted and fixedly connected to the two side slot walls of the left frame wall of the driven frame 15, so that the blocking member 25 is positioned on the driven frame 15 in a movable state.

[0084] Since the corner of the blocking member 25 is provided with a through spring groove, a torsion spring 26 is installed at the flip connection between the blocking member 25 and the driven frame 15. After the torsion spring 26 is placed in the spring groove of the blocking member 25, it is movably sleeved on the central column of the blocking member 25. One end of the spring 26 is engaged with the blocking member 25, and the other end is engaged with the driven frame 15. Since the blocking member 25 is in a closed and locked state on the driven frame 15 in the initial state, the torsion spring 26 is compressed and undergoes elastic deformation.

[0085] Since the first unlocking groove 501 is opened on the left cavity wall of the cavity of the outer shell frame 5, the width of the first unlocking groove 501 is greater than the width of the baffle part in the blocking member 25. When the driven frame 15 is driven to slide upward continuously, the baffle part in the blocking member 25 corresponds to the first unlocking groove 501. After the baffle part in the blocking member 25 loses its limiting block, it is reset by the elastic deformation of the torsion spring 26, so that the blocking member 25 is flipped and unfolded in the driven frame 15.

[0086] Since the upper end of the piston tube groove 7 is open, its upper opening is flared, and the upper opening is connected to the middle shell cavity of the outer casing 5. Since the lower side of the pressure plate of the blocking member 25 is provided with an integrated truncated cone, the size of the truncated cone is adapted to the size of the flared opening at the upper end of the piston tube groove 7. Since the second sealing ring 2501 is fixedly snapped onto the truncated cone of the pressure plate of the blocking member 25, in the initial state, the truncated cone of the pressure plate of the blocking member 25, together with the second sealing ring 2501, is connected to the flared opening on the piston tube groove 7 by a sealing plug. The second sealing ring 2501 seals the connection between the piston tube groove 7 and the middle shell cavity of the outer casing 5. When the blocking member 25 is driven to flip and unfold, the truncated cone of the blocking member 25 and the flared opening of the piston tube groove 7 lose their sealing plugging effect, that is, the obstruction of the piston tube groove 7 and the piston rod 8 is released.

[0087] Since the end of the second locking member 29 facing the cleaning rod 20 is the inward end and the end facing away from the cleaning rod 20 is the outward end, the inward end of the second locking member 29 is hemispherical. Since the middle of the second locking member 29 is provided with an integrated positioning ring, after the second locking member 29 is installed, the positioning ring is movably inserted into the limiting end cap of the sleeve part in the active frame 17. The inward end moves through the limiting end cap of the active frame 17 and extends into the ring cavity of the limiting end cap. The outward end moves through the limiting end cap of the active frame 17 and extends outward, so that the second locking member 29 is positioned on the active frame 17 in a movable state. When the cleaning rod 20 is driven to slide downward initially, through the linkage between the active frame 17 and the driven frame 15, the blocking member 25 releases the obstruction of the piston tube groove 7 and the piston rod 8. At this time, the second locking member 29 is correspondingly set with the third unlocking groove 601.

[0088] Because a fifth spring 30 is installed at the sliding connection between the limiting end cap in the active frame 17 and the second locking member 29, the fifth spring 30 is movably sleeved outside the second locking member 29 after it is installed. One end of the fifth spring 30 presses against the positioning ring in the second locking member 29, and the other end of the fifth spring 30 presses against the limiting end cap in the active frame 17. Also, in the initial state, the second locking member 29 is used for the locking function between the limiting end cap in the active frame 17 and the cleaning rod 20. At this time, the fifth spring 30 is compressed and undergoes elastic deformation.

[0089] Since the third unlocking groove 601 is located on the wall of the circular tube cavity in the tube frame 6, and the width of the third unlocking groove 601 is greater than the diameter of the second locking member 29, when the cleaning rod 20 is driven to slide downward initially, the second locking member 29 is correspondingly positioned with the third unlocking groove 601. After the outward end of the second locking member 29 loses its limiting obstruction, it is reset by the elastic deformation of the fifth spring 30, causing the second locking member 29 to extend and slide within the limiting end cap of the sleeve portion in the active frame 17, and causing the inward hemispherical end of the second locking member 29 to lose its engagement with the cleaning rod 20. Furthermore, after the cleaning rod 20 is installed, its middle section moves through the sleeve section of the active frame 17, and its upper section, along with the limiting end block 22, moves into the circular cavity of the tube frame 6 and extends outward. Its lower section moves into the square cavity of the outer shell frame 5, so that the cleaning rod 20 is positioned in a movable state within the circular cavity of the tube frame 6. When the cleaning rod 20 is driven to slide downward continuously, the active frame 17 has completed its sliding and is restricted from moving again, allowing the cleaning rod 20 to slide downward independently within the sleeve section of the active frame 17.

[0090] Because a third spring 21 is installed at the sliding connection between the cleaning rod 20 and the active frame 17, the third spring 21 is movably sleeved on the upper part of the cleaning rod 20 after it is installed. One end of the spring 21 presses against the limiting end cap in the active frame 17, and the other end presses against the limiting end block 22. When the cleaning rod 20 is driven to slide downwards alone, the third spring 21 is squeezed and undergoes elastic deformation.

[0091] Because the lower section of the cleaning rod 20 is designed as a thin rod, it is positioned on the same vertical central axis as the piston rod 8 after installation. Furthermore, because the lint-free cloth sleeve 24 is fitted over the thin rod of the lower section of the cleaning rod 20, the diameter of the lint-free cloth sleeve 24, supported by the thin rod of the lower section of the cleaning rod 20, matches the diameter of the rod cavity in the piston rod 8. Additionally, because the upper opening of the rod cavity in the piston rod 8 has a rounded chamfer, the cleaning rod 20 is driven to move independently... After sliding down, the thin rod of the lower section of the cleaning rod 20, along with the dust-free cloth sleeve 24, is connected to the rod cavity of the piston rod 8 by a frictional insertion method. The size of the rod cavity of the piston rod 8 is the same as the size of the suction port of the nozzle head body 11. After passing through the rod cavity of the piston rod 8, the thin rod of the lower section of the cleaning rod 20, along with the dust-free cloth sleeve 24, rubs through the suction port of the nozzle head body 11 and extends outward, completing the periodic automatic cleaning of dust in the rod cavity of the piston rod 8 and the suction port of the nozzle head body 11.

[0092] Meanwhile, in the above technical solutions, according to Figure 1 , Figure 3 , Figure 4 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown above, when the cleaning mechanism 3 is reset, the double-rod cylinder 4 is activated to retract and operate, causing the limiting end block 22 and the cleaning rod 20 to slide synchronously upward in the circular tube cavity of the tube frame 6. The third spring 21 provides pressure support. At this time, the active frame 17 is still restricted and cannot slide synchronously upward with the cleaning rod 20. When the cleaning rod 20 is driven to slide upward initially, the elastic deformation of the third spring 21 resets the cleaning rod 20, allowing it to slide upward independently in the sleeve section of the active frame 17. After the cleaning rod 20 is driven to slide upward initially, the thin rod body of the lower section of the cleaning rod 20, along with the dust-free cloth sleeve 24, separates from the rod cavity in the piston rod 8 and the suction port in the suction head body 11, and returns to the square cavity in the outer shell frame 5.

[0093] Because the upper wall of the third unlocking groove 601 is inclined, and the outward hemispherical end of the second locking member 29 is connected to the third unlocking groove 601 in a sliding manner, and because the outward end of the second locking member 29 is hemispherical, when the cleaning rod 20 is driven to slide upward initially, the outward hemispherical end of the second locking member 29 slides along the inclined groove wall of the third unlocking groove 601, and the outward hemispherical end of the second locking member 29 is repositioned and pressed against the cavity wall of the circular tube cavity in the tube frame 6, pushing the fifth spring 30. The elastic deformation causes the second locking member 29 to be pushed into the limiting end cover in the active frame 17 and slide in retraction, and the inward hemispherical end of the second locking member 29 to re-engage with the cleaning rod 20, thereby re-engaging and locking the sleeve part in the active frame 17 with the cleaning rod 20. When the cleaning rod 20 is driven to slide upward continuously, it drives the active frame 17 to move upward synchronously. The elastic deformation of the second spring 18 is used to reset, so that when the active frame 17 is driven, it slides upward at the upper end of the cavity in the outer shell frame 5.

[0094] Because the lower wall of the first unlocking groove 501 is inclined, and the baffle portion of the blocking member 25 is slidably connected to the first unlocking groove 501, and because the upper end of the baffle portion of the blocking member 25 is semi-circular, when the active frame 17 is driven to slide upward, it is driven by the linkage plate 19 and reset by the elastic deformation of the tension spring 16, causing the driven frame 15 to slide downward at the lower end of the cavity in the outer shell frame 5. After the driven frame 15 is initially driven to slide downward, the semi-circular end of the baffle portion of the blocking member 25 follows the first The inclined groove wall in the unlocking groove 501 slides, and the baffle part in the blocking member 25 is repositioned and pressed against the left cavity wall of the middle cavity of the outer shell frame 5, so that the blocking member 25 flips and closes in the driven frame 15, and the torsion spring 26 is compressed and undergoes elastic deformation. After the blocking member 25 flips and closes, the truncated cone of the pressure plate part, together with the second sealing rubber ring 2501, seals and plugs the flared opening of the piston tube groove 7, and performs sealing treatment at the connection between the piston tube groove 7 and the middle cavity of the outer shell frame 5, that is, the piston tube groove 7 and the piston rod 8 are re-covered.

[0095] Since the lower wall of the second unlocking groove 502 is inclined, and the outward end of the first locking member 27 is connected to the second unlocking groove 502 in a sliding manner, and since the outward end of the first locking member 27 is semi-circular, when the driven frame 15 is driven to slide downward, the outward semi-circular end of the first locking member 27 slides along the inclined groove wall in the second unlocking groove 502, and the outward semi-circular end of the first locking member 27 is repositioned and pressed against the right cavity wall of the square cavity of the outer shell frame 5, so that the first locking member 27 retracts and slides within the lower frame wall of the driven frame 15, and the fourth spring 28 is compressed and undergoes elastic deformation. After the first locking member 27 retracts and slides, its inward oblique tongue end engages with the pressure plate part of the blocking member 25, locking the blocking member 25 on the driven frame 15, and completing the reset operation of the cleaning mechanism 3.

[0096] Meanwhile, in the above technical solutions, according to Figure 3 , Figure 9 , Figure 11 and Figure 12 As shown above, since the limiting ring 23 is fitted and bolted to the middle section of the cleaning rod 20, and the limiting ring 23 is connected to the upper frame wall of the active frame 17 by pressing, when the cleaning rod 20 is driven to slide upward, the limiting ring 23 continuously pulls the active frame 17 upward, limiting the active frame 17. Furthermore, through the linkage between the active frame 17 and the driven frame 15, the driven frame 15 is driven to move downward, limiting the driven frame 15 and maintaining the sealing plug of the truncated cone in the blocking member 25 at the flared opening in the piston tube groove 7, ensuring the tightness of the plug.

[0097] Example 2:

[0098] Based on Embodiment 1, please refer to the following: Figures 14-16 The technical solution shown addresses the cleaning method of scrubbing the nozzle cavity. During the scrubbing process, dust is transferred from the nozzle cavity to the scrubbing component and adheres to it. When the scrubbing component performs a secondary scrubbing operation, it brings the retained dust back into the nozzle cavity, affecting the cleaning effect. To address the problem that existing scrubbing components cannot achieve self-cleaning after scrubbing the nozzle cavity, the third air supply pipe 32 inflates the rod cavity of the cleaning rod 20 to form a high-pressure airflow, which blows out the dust adsorbed and retained on the lint-free cloth cover 24. The dust blown out is then collected by the dust collection hood 34.

[0099] Specifically, in this technical solution, the cleanroom cloth cover 24 undergoes a self-cleaning operation, according to... Figure 14 , Figure 15 and Figure 16As shown, the sealing plug at the flared opening in the piston tube groove 7 by the truncated cone in the blocking member 25 disconnects the connection between the square cavity of the outer shell frame 5 and the piston tube groove 7, so that the square cavity of the outer shell frame 5 forms an independent cleaning chamber. After the cleaning rod 20 has cleaned the piston rod 8 and the nozzle head body 11, it is placed in the square cavity of the outer shell frame 5.

[0100] Since a through-hole is provided in the middle of the left shell wall of the outer shell frame 5, and a sealing gasket is provided at the connection between the dust hood 34 and the outer shell frame 5, after the dust hood 34 is installed, it is snapped and fixedly connected to the left shell wall of the outer shell frame 5 with the sealing gasket. After the cleaning rod 20 is placed in the middle shell cavity of the outer shell frame 5, the thin rod body of the lower section of the cleaning rod 20, together with the dust-free cloth cover 24, is set to correspond with the dust hood 34.

[0101] Because the cleaning rod 20 is hollow, with a rod cavity at its vertical central axis, the rod cavity extends from the upper section of the cleaning rod 20 to the lower thin section of the cleaning rod 20. Furthermore, the third main air passage 104 is located at the front end of the support frame 1, with branch channels connected to it arranged at equal intervals. It also has openings on both its left and right sides, forming a bidirectional channel. Additionally, a sealing gasket is provided between the lower end of the spring guide tube 31 and the rod cavity of the cleaning rod 20. After installation, the lower end of the spring guide tube 31, along with the sealing gasket, is threadedly fixed to the upper end of the rod cavity of the cleaning rod 20. A sealing gasket is also provided between the upper end of the spring guide tube 31 and the branch channel of the third main air passage 104. After installation, the upper end of the spring guide tube 31, along with the sealing gasket, is threadedly fixed to the branch channel of the third main air passage 104, thus connecting the third main air passage 104, the rod cavity of the cleaning rod 20, and the spring guide tube 31.

[0102] Since the third main air passage 104 is used for the synchronous connection of multiple spring conduits 31, the left opening of the third main air passage 104 is connected to the third air supply pipe 32 through the micro solenoid valve 12. Since the third air supply pipe 32 is connected to the air supply equipment for inflation (the air supply equipment is existing technology and is not described in the attached drawings of the specification), the micro solenoid valve 12 on the third air supply pipe 32 is opened. At this time, the micro solenoid valve 12 on the liquid supply pipe 33 is closed. The third main air passage 104 is inflated through the third air supply pipe 32. After the third main air passage 104 is inflated, the branch flow channel and spring conduit 31 in the third main air passage 104 inflate the rod cavity in the cleaning rod 20, forming a high-pressure airflow in the rod cavity in the cleaning rod 20.

[0103] Because the thin rod body of the lower section of the cleaning rod 20 has through openings 2001 at equal intervals that are connected to the rod cavity of the cleaning rod 20, and the through openings 2001 are arranged at equal intervals from top to bottom, the rod cavity of the cleaning rod 20 and the cleanroom cloth cover 24 are interconnected through the through openings 2001. The high-pressure airflow in the rod cavity of the cleaning rod 20 is discharged through the through openings 2001, impacting the cleanroom cloth cover 24 and blowing out the dust adsorbed and retained on the cleanroom cloth cover 24.

[0104] Since the cavity of the dust hood 34 is connected to the cavity of the outer shell 5, multiple dust hoods 34 are simultaneously connected to the pipes of an external air extraction device (the air extraction device is existing technology and is not described in the attached drawings of the manual). After the dust on the cleanroom cloth cover 24 is blown out, it is placed in the cavity of the outer shell 5. The air extraction device is started to operate, and the dust hood 34 extracts air from the cavity of the outer shell 5, and the blown-out dust is extracted and collected by the dust hood 34, thus completing the self-cleaning process of the cleanroom cloth cover 24.

[0105] Meanwhile, in the above technical solutions, according to Figure 14 , Figure 15 and Figure 16 As shown, since the right opening of the third main air duct 104 is connected to the external liquid supply pipe 33 through the miniature solenoid valve 12, and since the liquid supply pipe 33 is connected to the alcohol supply equipment for liquid supply (the alcohol supply equipment is prior art and is not described in the accompanying drawings), before the cleaning rod 20 performs cleaning work, it closes the miniature solenoid valve 12 on the third air supply pipe 32 and opens the miniature solenoid valve 12 on the liquid supply pipe 33, starting the operation of the alcohol supply equipment, and supplies liquid to the third main air duct through the liquid supply pipe 33. Alcohol is supplied to the third main airway 104. After the third main airway 104 is filled with alcohol, the alcohol is supplied to the rod cavity of the cleaning rod 20 through the branch flow channel and spring guide tube 31 in the third main airway 104. The alcohol is also supplied to the cleanroom cloth cover 24 through the through port 2001. After the cleanroom cloth cover 24 is filled with alcohol, the thin rod body of the lower section of the cleaning rod 20, together with the cleanroom cloth cover 24, passes through and rubs against the rod cavity of the piston rod 8 and the suction port of the nozzle head body 11 to achieve the purpose of alcohol cleaning and ensure the cleanliness.

[0106] Meanwhile, in the above technical solutions, according to Figure 14 As shown, a replacement port is provided at the upper end of the right side shell wall of the outer shell frame 5. A cover is sealed and fixed at the replacement port. After removing the cover at the replacement port, the limit ring 23 can be removed through the replacement port in the outer shell frame 5. Then, the fixing between the cleaning rod 20 and the limit end block 22 is loosened. The cleaning rod 20 can be removed from the tube shell frame 6 by pulling, so that the replacement operation can be performed.

[0107] Since the root of the thin rod at the lower section of the cleaning rod 20 is threaded with an end cap, which is used to clamp and fix the upper end of the cleanroom cloth cover 24, after removing the end cap from the cleaning rod 20, the fixed installation of the cleanroom cloth cover 24 on the cleaning rod 20 is released, and the cleanroom cloth cover 24 can be replaced.

[0108] This is the entire working process of the fully automatic chip mounter for circuit boards. Any content not described in detail in this manual is existing technology known to those skilled in the art.

[0109] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0110] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully automatic chip mounter for circuit boards, comprising: The support frame (1) has an integrated assembly plate (101) provided at equal intervals on its lower side. Its characteristic is that it further includes: The suction nozzle assembly (2) is fixedly mounted on the assembly plate (101) and is used for the automatic adsorption and placement of electronic components. The cleaning mechanism (3) is located directly above the nozzle assembly (2). During normal operation of the pick-and-place machine, it is used for the periodic automatic cleaning of the nozzle assembly (2). The cleaning mechanism (3) is driven to move by a double-rod cylinder (4) fixed on the support frame (1).

2. The fully automatic chip mounter for circuit boards according to claim 1, characterized in that: The suction nozzle assembly (2) includes a housing frame (5), a piston rod (8), and a suction nozzle head body (11). The upper end of the housing frame (5) is sealed and fixed together with a tube frame (6) fixed on the assembly plate (101). A piston tube groove (7) is provided on the lower side wall of the square cavity in the housing frame (5), and a piston rod (8) that can slide on the housing frame (5) is provided in the piston tube groove (7). A first spring (10) is installed at the sliding connection between the piston rod (8) and the spring frame (9), and the spring frame (9) is fixed to the lower end of the housing frame (5). The piston rod (8) has a removable and replaceable suction head body (11) threadedly fixed to the lower end of the columnar rod portion, and the suction port in the suction head body (11) is sealed and connected to the rod cavity in the piston rod (8).

3. The fully automatic chip mounter for circuit boards according to claim 2, characterized in that: The piston tube groove (7) has a bottom air passage (701) on its flat groove wall, and the bottom air passage (701) is sealed and connected to the first auxiliary air passage (1011) on the assembly plate (101). The first auxiliary air passage (1011) is connected to the first main air passage (102) in the support frame (1). The right opening of the first main air passage (102) is connected to the first air supply pipe (13) through the micro solenoid valve (12).

4. The fully automatic chip mounter for circuit boards according to claim 3, characterized in that: The piston tube groove (7) has a side air passage (702) on its curved side wall, and the side air passage (702) is sealed and connected to the second auxiliary air passage (1012) on the assembly plate (101). The second auxiliary air passage (1012) is connected to the second main air passage (103) in the support frame (1). The left opening of the second main air passage (103) is connected to the second air supply pipe (14) through the micro solenoid valve (12). The side air passage (702) is connected to the transverse air passage (801) opened on the cylindrical head of the piston rod (8) in a communicating manner, and the transverse air passage (801) is connected to the rod cavity in the piston rod (8). A first sealing ring (802) is provided above and below the transverse air passage (801) and is snapped onto the cylindrical head in the piston rod (8).

5. The fully automatic chip mounter for circuit boards according to claim 1, characterized in that: The cleaning mechanism (3) includes a driven frame (15), an active frame (17), and a cleaning rod (20). The driven frame (15) forms a sliding structure at the lower end of the cavity in the outer shell frame (5), and a tension spring (16) is installed at the sliding connection between the two. The active frame (17) is slidably connected to the upper end of the cavity in the outer shell frame (5), and a second spring (18) is installed at the sliding connection between the two. A connecting plate (19) for transmission is provided between the driven frame (15) and the active frame (17), and the middle part of the connecting plate (19) is rotatably connected to the cavity wall of the cavity in the outer shell frame (5). The left and right ends of the connecting plate (19) are slidably connected to the pin in the driven frame (15) and the pin in the active frame (17), respectively. In the active frame (17), a cleaning rod (20) is slidably connected inside the sleeve section, and a third spring (21) is installed at the sliding connection between the two. The upper section of the cleaning rod (20) is fixedly connected to the limiting end block (22) fixedly connected to the output end of the double rod cylinder (4), and the cleaning rod (20) together with the limiting end block (22) forms a synchronous sliding structure in the circular tube cavity of the tube frame (6). Among them, the middle section of the cleaning rod (20) is fixedly connected to a limiting ring (23), and the limiting ring (23) is connected to the upper side frame wall of the active frame (17) by pressing. The thin rod of the lower section of the cleaning rod (20) is covered with a dust-free cloth sleeve (24), and the cleaning rod (20) together with the dust-free cloth sleeve (24) is connected to the rod cavity of the piston rod (8) and the suction port of the nozzle head body (11) by interlocking friction.

6. The fully automatic chip mounter for circuit boards according to claim 5, characterized in that: The driven frame (15) is connected to a blocking member (25) by flipping, and a torsion spring (26) is installed at the flipping connection between the two. The baffle part of the blocking member (25) is connected to the first unlocking groove (501) opened on the left side cavity wall of the outer shell frame (5) by sliding. The lower side groove wall of the first unlocking groove (501) is set in an inclined state. The second sealing ring (2501) is fixed on the round platform of the pressure plate part of the blocking member (25). The round platform of the blocking member (25) along with the second sealing ring (2501) is connected to the horn-shaped opening on the piston tube groove (7) by sealing and plugging.

7. The fully automatic chip mounter for circuit boards according to claim 6, characterized in that: The driven frame (15) is slidably connected to the lower frame wall of the first locking member (27), and a fourth spring (28) is installed at the sliding connection between the two. The inward oblique tongue end of the first locking member (27) is connected to the pressure plate part of the blocking member (25) by a snap-fit ​​method. The outward end of the first locking member (27) is slidably connected to the second unlocking groove (502) opened on the right cavity wall of the square shell cavity in the outer shell frame (5), and the lower groove wall of the second unlocking groove (502) is set in an inclined state.

8. The fully automatic chip mounter for circuit boards according to claim 5, characterized in that: The active frame (17) has a second locking member (29) slidably connected inside the limiting end cap of the sleeve section, and a fifth spring (30) is installed at the sliding connection between the two. The inward hemispherical end of the second locking member (29) is connected to the cleaning rod (20) by a snap-fit ​​method, and the outward hemispherical end of the second locking member (29) is slidably connected to the third unlocking groove (601) opened on the circular tube cavity in the tube frame (6). The upper side wall of the third unlocking groove (601) is set in an inclined state.

9. A fully automatic chip mounter for circuit boards according to claim 5, characterized in that: The lower section of the cleaning rod (20) has thin rods with through openings (2001) at equal intervals that are connected to the rod cavity in the cleaning rod (20). The upper end of the rod cavity in the cleaning rod (20) is connected to the lower end of the spring guide tube (31), and the upper end of the spring guide tube (31) is connected to the third main air passage (104) opened in the support frame (1). The left opening of the third main air passage (104) is connected to the third air supply pipe (32) through the micro solenoid valve (12), and the right opening of the third main air passage (104) is connected to the liquid supply pipe (33) through the micro solenoid valve (12).

10. A fully automatic chip mounter for circuit boards according to claim 9, characterized in that: The thin rod of the lower section of the cleaning rod (20) is correspondingly set with the dust hood (34), and the dust hood (34) is sealed and fixed to the dust cleaning port in the outer shell frame (5). Air is supplied to the rod cavity of the cleaning rod (20) through the third air supply pipe (32), and the dust-free cloth cover (24) is self-cleaned in conjunction with the removal of the dust hood (34).

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