Equipment for horizontal non-contact production of circuit board

Abstract

The invention relates to the technical field of circuit board processing equipment, in particular to equipment for horizontally producing a circuit board in a non-contact mode. The equipment aims at solving the technical problems that existing circuit board processing equipment adopting a vertical carrier for conveying is low in production efficiency, high in equipment cost and difficult to be compatible with a mainstream horizontal production line. According to the technical scheme, the machine comprises a machine body, a spraying mechanism and a driving mechanism; the circuit board conveying device is characterized in that the driving mechanism is arranged along two sides or a central area of a horizontal conveying path defined in the machine body and comprises at least two rows of conveying wheel sets composed of upper conveying wheels and lower conveying wheels, and the conveying wheel sets only clamp process edges of a circuit board and drive the circuit board to move along the horizontal path. Through a horizontal non-contact conveying mode of only clamping the process edge, a carrier does not need to be used, the production efficiency is improved, the conveying speed is increased, and the equipment cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of circuit board processing equipment technology, specifically to a horizontal non-contact circuit board production equipment. Background Technology

[0002] As electronic products become increasingly dense and thinner, higher demands are placed on the manufacturing processes of high-precision circuit boards. To avoid damage to delicate circuits or the appearance of the board surface due to physical contact during wet processing, non-contact processing has become a key technology.

[0003] Existing technologies generally employ vertical conveying solutions, which involve using a dedicated frame carrier to hold the circuit board and move it vertically within the processing equipment. While this solution achieves contactless processing, it has significant inherent drawbacks: First, the loading and unloading process of the circuit board on the carrier is cumbersome and time-consuming; second, the conveying speed is severely limited, resulting in low overall production efficiency; furthermore, the cyclical use and reciprocating transport of the carrier not only increases the manufacturing cost and structural complexity of the equipment but also makes it difficult to seamlessly integrate with the industry's mainstream horizontal production lines, thus limiting its widespread application.

[0004] Based on the above, this application proposes a horizontal non-contact production equipment for circuit boards, which can effectively solve the above problems. Summary of the Invention

[0005] To address the problems of low efficiency, high cost, and incompatibility with horizontal production lines in existing vertical conveying solutions, this application proposes a device for horizontal non-contact production of circuit boards.

[0006] A horizontal, non-contact circuit board manufacturing apparatus, comprising: The body, the interior of which defines a horizontal transport path; A spraying mechanism, disposed within the machine body, is used to spray liquid chemicals onto the circuit board moving along the horizontal conveying path; and A drive mechanism is disposed within the machine body and arranged along both sides or the central area of ​​the horizontal conveying path. The drive mechanism includes at least two sets of conveying wheels, each set of conveying wheels including an upper conveying wheel and a lower conveying wheel, for clamping the process edge of the circuit board and driving the circuit board to move along the horizontal conveying path.

[0007] This solution achieves contactless wet processing of circuit boards in the horizontal direction by setting up a horizontal drive mechanism that only clamps the process edge, combined with a spraying mechanism. Compared with the traditional vertical conveying, this horizontal conveying mode helps to improve conveying speed and production efficiency, and can simplify the equipment structure to a certain extent.

[0008] In one embodiment, the driving mechanism further includes a lower drive shaft, an upper drive shaft, and a gear transmission structure. The rotation axis of the lower drive shaft is perpendicular to the extension direction of the horizontal conveying path, and multiple lower conveying wheels are fixedly mounted thereon at intervals. The rotation axis of the upper drive shaft is parallel to the lower drive shaft, and multiple upper conveying wheels are fixedly mounted thereon at intervals. The gear transmission structure is meshed between the lower drive shaft and the upper drive shaft to drive them to rotate synchronously. This solution, by driving the upper and lower conveying wheels to rotate synchronously in opposite directions through the gear transmission structure, helps to achieve stable clamping and conveying of the circuit board's process edges, thereby suppressing circuit board misalignment or damage that may be caused by speed differences.

[0009] In one embodiment, the spraying mechanism includes an upper spray pipe and a lower spray pipe, which are located above and below the horizontal conveying path, respectively, and are used to spray chemical solution onto the upper and lower surfaces of the circuit board. This design, by setting spray pipes on both the upper and lower sides, allows for simultaneous chemical treatment of the two main working surfaces of the circuit board, which is beneficial for achieving a more uniform processing effect and improving processing efficiency.

[0010] In one embodiment, a liquid circulation system connected to the spraying mechanism is also included. The liquid circulation system includes a water pump and a filter. The water pump is connected to the upper end of the filter, and one end of the lower part of the filter is connected to the spraying mechanism, while the other end connects to a chemical tank located at the lower part of the machine body. This solution achieves the recycling of the chemical solution by constructing a liquid circulation system, saving chemical costs. Simultaneously, the filter removes impurities from the chemical solution, helping to maintain the cleanliness of the sprayed solution and reducing the possibility of impurities clogging nozzles or contaminating circuit boards, thereby improving production stability and product yield.

[0011] In one embodiment, one row of conveyor wheels of the drive mechanism is positioned on the geometric center line of the horizontal conveying path to clamp and support a central process edge of the circuit board. This design is particularly suitable for circuit boards that are large or thin. By adding a support point in the center, it helps to suppress the deflection deformation of the circuit board during conveying due to its own weight or the impact of the spray, thereby improving the conveying stability and processing accuracy of such circuit boards.

[0012] In one embodiment, the system further includes multiple sets of self-cleaning components. Each set of self-cleaning components includes a main body and a brush head connected to the main body. The working edge of the brush head abuts against the outer peripheral surface of the upper or lower conveyor wheel to scrape off dirt adhering thereto by means of the rotation of the conveyor wheel itself. This solution, by incorporating self-cleaning components, can remove accumulated drug crystals or dirt from the conveyor wheels online, helping to maintain the cleanliness and friction of the conveyor wheel surface, thereby improving clamping reliability and extending equipment maintenance cycles to some extent.

[0013] In one embodiment, the brush head includes an upper scraper and a lower scraper, which respectively conform to the outer peripheral surfaces of the upper and lower conveyor wheels. Both the upper and lower scrapers have grooves inside that serve as drainage channels. They extend downwards and converge to form the main body, with their ends aligned with the medicine tank. This design refines the structure of the self-cleaning component. Both the upper and lower scrapers have grooves inside that provide drainage channels, and they converge downwards to form the main body. This efficiently drains and collects the dirt scraped off by the upper and lower conveyor wheels, resulting in a more compact structure and a more direct and reliable drainage effect.

[0014] In one embodiment, drainage grooves are provided on the outer peripheral surface of the lower conveyor wheel. These grooves are symmetrically arranged on both sides of the outer peripheral surface of the lower conveyor wheel and are arranged at an angle. This design, by providing symmetrically arranged inclined drainage grooves on the lower conveyor wheel, utilizes its rotation to actively drain the accumulated liquid from the center to both sides, effectively reducing the possibility of the liquid being carried into the clamping interface. This enhances the friction and reliability of the clamping, and helps reduce the soaking of the circuit board process edges by excessive liquid.

[0015] In one embodiment, the drive mechanism further includes a floating component comprising a floating lever arm and an elastic element. One end of the floating lever arm is sleeved on the upper drive shaft, and the other end is connected to the upper conveyor wheel. One end of the elastic element is connected to the upper surface of the floating lever arm, and the other end is connected to a stationary position on the machine body to apply an elastic downward pressure to the floating lever arm, allowing the upper conveyor wheel to float up and down relative to the lower conveyor wheel to adapt to circuit boards of different thicknesses. This solution, by introducing a floating component, enables the upper conveyor wheel to have adaptive floating capabilities, improving the versatility and ease of operation of the equipment. Simultaneously, the downward pressure applied by the elastic element helps maintain a stable clamping force on the circuit board.

[0016] In one embodiment, the floating assembly further includes a driving gear fixed to the upper drive shaft, a driven gear fixed to the axle of the upper conveyor wheel, and an idler wheel mounted on the floating lever arm. The idler wheel is positioned between the driving gear and the driven gear and meshes with both simultaneously to transmit the rotation of the upper drive shaft to the upper conveyor wheel in the same direction. This design, by establishing a transmission chain consisting of the driving gear, idler wheel, and driven gear, ensures that the idler wheel effectively bridges the driving gear and driven gear while the upper conveyor wheel floats up and down, thus transmitting the rotation of the upper drive shaft to the upper conveyor wheel in the same direction and maintaining the continuity and stability of the conveying process.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up an upper and lower conveyor wheel drive mechanism that is arranged along both sides or the center of the horizontal conveying path and only clamps the process edge of the circuit board, horizontal contactless conveying of the circuit board is realized. Compared with the traditional vertical conveying method, it helps to improve production efficiency and improves compatibility with existing horizontal production lines.

[0018] 2. By setting up a drive system that includes upper and lower drive shafts and gear transmission structure, the synchronous rotation of the upper and lower conveyor wheels is realized, providing technical support for the stable conveying of circuit boards.

[0019] 3. By setting up a set of conveyor wheels to support the central process edge of thin or large boards, it helps to suppress the deflection and deformation of the boards during the conveying process, thereby expanding the applicability of the equipment to circuit boards of different specifications.

[0020] 4. By setting up a floating assembly that includes a floating lever arm, elastic element and idler gear drive chain, the equipment can automatically adapt to circuit boards of different thicknesses, simplifying operation and improving production flexibility and equipment versatility.

[0021] 5. By setting up a self-cleaning component consisting of hollow upper and lower scrapers that converge together and a conveyor wheel with symmetrical inclined drainage grooves, the equipment achieves online self-cleaning and active drainage functions, which helps reduce downtime maintenance needs, improves the reliability of conveying and clamping, and helps improve the cleanliness of the production process. Attached Figure Description

[0022] Figure 1 A side sectional view of Embodiment 1 of a horizontal non-contact circuit board production device provided in this application.

[0023] Figure 2 A front view of Embodiment 1 of a horizontal non-contact circuit board production device provided in this application.

[0024] Figure 3A side view of Embodiment 1 of a horizontal non-contact circuit board production device provided in this application.

[0025] Figure 4 A cross-sectional schematic diagram of Embodiment 1 of a horizontal non-contact circuit board production device provided in this application.

[0026] Figure 5 An exploded view of Embodiment 1 of a horizontal non-contact circuit board production device provided in this application.

[0027] Figure 6 This is a schematic diagram of the drive mechanism and the circuit board in Embodiment 1 of a horizontal non-contact circuit board production device provided in this application.

[0028] Figure 7 for Figure 6 Enlarged diagram of point A in the middle.

[0029] Figure 8 This is a schematic diagram of the spraying mechanism in Embodiment 1 of a horizontal non-contact circuit board production equipment provided in this application.

[0030] Figure 9 This is a schematic diagram of the drive mechanism and the circuit board in Embodiment 2 of a horizontal non-contact circuit board production device provided in this application.

[0031] Figure 10 This is a schematic diagram of the drive mechanism and the circuit board in Embodiment 3 of a horizontal non-contact circuit board production device provided in this application.

[0032] Figure 11 for Figure 10 Enlarged diagram of point B in the middle.

[0033] Figure 12 This is a schematic diagram of the floating component in Embodiment 3 of a horizontal non-contact circuit board production device provided in this application.

[0034] Figure 13 for Figure 12 Enlarged diagram of point C in the middle.

[0035] Figure 14 This is a schematic diagram of the self-cleaning component at a first angle in Embodiment 4 of a horizontal non-contact circuit board production device provided in this application.

[0036] Figure 15 This is a schematic diagram of the self-cleaning component at a second angle in Embodiment 4 of a horizontal non-contact circuit board production device provided in this application.

[0037] Figure 16This is a schematic diagram of the lower conveyor wheel in Embodiment 4 of a horizontal non-contact circuit board production device provided in this application.

[0038] Figure 17 The diagram shows the structure of the limiting plate in Embodiments 3 and 4 of the equipment for producing horizontal non-contact circuit boards provided in this application.

[0039] Explanation of reference numerals in the attached figures: 1. Machine body; 11. Horizontal conveying path; 12. Medicine tank; 13. Lifting door; 14. Support legs; 2. Spraying mechanism; 21. Upper spray pipe; 22. Lower spray pipe; 23. Upper main pipe; 24. Lower main pipe; 25. Main conveying pipe; 3. Drive mechanism; 31. Conveying wheel assembly; 311. Upper conveying wheel; 312. Lower conveying wheel; 3121. Drainage trough; 32. Lower drive shaft; 33. Upper drive shaft; 34. Gear transmission structure; 341. Spur gear-bevel gear assembly; 342. Transmission spur gear; 35. Floating component; 351. Floating lever arm; 352. Elastic component; 353. Driving gear; 354. Driven gear; 355. Idler gear; 356. Limiting plate; 36. Support frame; 361. Support plate; 362. Extension plate; 37. Motor mounting bracket; 371. Main drive motor; 372. Motor shaft; 373. Drive bevel gear; 38. Limiting wheel; 4. Circuit board; 41. Process edge; 5. Liquid circulation system; 51. Water pump; 52. Filter; 6. Self-cleaning component; 61. Main body; 62. Brush head; 621. Upper scraper; 622. Lower scraper; 623. Drainage channel. Detailed Implementation

[0040] This application provides a horizontal non-contact circuit board production device. In this embodiment, "non-contact" means that the circuit board production device has no physical contact with the "effective circuit area of ​​the circuit board." The following description, in conjunction with the appendix... Figure 1-17 This application will be described in further detail.

[0041] Example 1 Reference Figure 1-8 A horizontal non-contact circuit board production device includes a body 1, a spraying mechanism 2 and a drive mechanism 3. The structural design of this embodiment is mainly suitable for conveying thick circuit boards with a certain rigidity.

[0042] In this embodiment, the body 1 is an integral box-shaped structure, usually made of chemically resistant materials. In this embodiment, stainless steel is preferred to ensure that the structure remains stable even in long-term contact with chemical solutions.

[0043] Specifically, the internal space of the body 1 is functionally divided into an upper region and a lower region. The upper region is the core functional area for conveying and spraying the circuit board 4 along a horizontal conveying path 11, while the lower region mainly constitutes a large-capacity chemical tank 12 for storing and circulating chemical solutions.

[0044] More specifically, to facilitate operators in replenishing or maintaining the medicine tank 12, a sliding door 13 is provided on one outer wall of the machine body 1. This sliding door 13 is equipped with a handle for easy gripping; operators can pull the handle upwards to open the door 13, thereby exposing the interior of the medicine tank 12. For convenient collection of the medicine, the bottom plate of the medicine tank 12 is designed with an inclined structure at a certain angle, with its higher side tightly abutting against the bottom edge of the sliding door 13, while the lower side forms a collection area.

[0045] Furthermore, the entire body 1 is securely supported on the ground by a plurality of support feet 14 located at its bottom to ensure the levelness and stability of the equipment during operation. In this embodiment, four support feet are preferred.

[0046] Specifically, the spraying mechanism 2 includes multiple upper spray pipes 21 and multiple lower spray pipes 22. The direction of these spray pipes is perpendicular to the extension direction of the horizontal conveying path 11. The multiple upper spray pipes 21 and multiple lower spray pipes 22 are arranged in an array along the extension direction of the horizontal conveying path 11, forming two spraying matrices covering the entire processing area. Each upper spray pipe 21 has multiple downward-facing, slightly angled nozzles to evenly spray the liquid onto the upper surface of the circuit board 4; correspondingly, each lower spray pipe 22 also has multiple upward-facing, slightly angled nozzles to spray the liquid onto the circuit board 4.

[0047] More specifically, the multiple upper nozzles 21 arranged in the array are sealed at the end near the lifting door 13, while the other end away from the lifting door 13 is connected to an upper main pipe 23 through a pipe; the multiple lower nozzles 22 are also connected to a lower main pipe 24 in the same way. The upper main pipe 23 and the lower main pipe 24 then merge into a main delivery pipe 25.

[0048] In this embodiment, the device includes a complete closed-loop liquid circulation system 5, comprising a water pump 51 located outside the main body 1 and a filter 52 connected to the water pump 51. The water pump 51 is connected to the top of the filter 52, and the bottom of the filter 52 is provided with an inlet and an outlet. The inlet of the filter 52 extends into the collection area of ​​the medicine tank 12 through another pipe, and the outlet of the filter 52 is connected to the main delivery pipe 25. When the water pump 51 is started, the medicine is drawn from the medicine tank 12, forced to pass through the filter 52 to remove impurities such as solid particles and chemical crystals, and then pressurized and transported to the main delivery pipe 25. It is then evenly distributed to the upper main pipe 23 and the lower main pipe 24, until it is transported to each upper spray pipe 21 and lower spray pipe 22, and finally sprayed out at high speed through the nozzles. The sprayed medicine will drip naturally and be collected back into the medicine tank 12 below, forming a highly efficient, energy-saving, and environmentally friendly closed-loop circulation.

[0049] In this embodiment, the drive mechanism 3 is the core component for performing the conveying function, and includes multiple sets of conveyor wheel sets 31 distributed along the horizontal conveying path 11. Each conveyor wheel set 31 includes an upper conveyor wheel 311 located above the circuit board 4 and a lower conveyor wheel 312 located below it, which correspond precisely and are located together on the process edges 41 on both sides of the circuit board 4. In this embodiment, the conveyor wheel sets 31 are preferably two sets, and are respectively arranged on both sides of the horizontal conveying path 11.

[0050] Specifically, multiple lower conveyor wheels 312 are securely mounted at equal intervals on a lower drive shaft 32, and correspondingly, multiple upper conveyor wheels 311 are mounted on an upper drive shaft 33 parallel to the lower drive shaft 32. To enable the upper drive shaft 33 and the lower drive shaft 32 to rotate synchronously and in opposite directions to stably propel the circuit board 4 forward, the drive mechanism 3 employs a gear transmission structure 34. This gear transmission structure 34 mainly consists of several spur-bevel gear assemblies 341 and meshing spur gears 342. The lower drive shaft 32 is coaxially connected to the spur gear portion of the spur-bevel gear assembly 341, while the upper drive shaft 33 is coaxially connected to the spur gear 342. Because the spur gear 342 meshes with the spur gear portion of the assembly 341, synchronous and opposite movements of the upper and lower drive shafts are achieved.

[0051] More specifically, two support frames 36 are spaced apart on the inner bottom plate of the medicine tank 12 along a direction perpendicular to the horizontal conveying path 11. Each support frame 36 has a precision-machined support plate 361 horizontally fixed to its top. The support plate 361 provides bearing mounting positions for the upper drive shaft 33, the lower drive shaft 32, and the gear transmission structure 34.

[0052] More specifically, a motor mounting bracket 37 is provided on the support plate 361 near the lifting door 13. The motor mounting bracket 37 is perpendicular to the support plate 361, and a main drive motor 371 is mounted on the motor mounting bracket 37. The motor shaft 372 output by the main drive motor 371 extends along the direction of the horizontal conveying path 11, and multiple drive bevel gears 373 are sleeved and fixed on it. The drive bevel gears 373 mesh with the bevel gear portion of the aforementioned spur-bevel gear assembly 341, thereby transmitting the rotational power of the main drive motor 371 to the gear transmission structure 34, and finally driving all the conveying wheel sets 31 to work synchronously through the upper drive shaft 33 and the lower drive shaft 32, clamping and driving the circuit board 4 to move along the preset horizontal conveying path 11 at a stable linear speed.

[0053] In this embodiment, to further improve the lateral stability of the circuit board 4 during transport and prevent it from deviating, a limiting wheel 38 is coaxially sleeved and fixed on the lower drive shaft 32 on the side of each lower conveyor wheel 312 near the support plate 361. The diameter of the limiting wheel 38 is slightly larger than that of the lower conveyor wheel 312, and its overall height is designed so that its top surface is slightly lower than the upper surface of the process edge 41 of the circuit board 4, which is 0.1-0.2 mm lower in this embodiment, thereby avoiding interference with the upper conveyor wheel 311. Since the limiting wheel 38 is fixedly connected to the lower drive shaft 32, it rotates synchronously with the lower conveyor wheel 312. When the circuit board 4 moves laterally and contacts the limiting wheel 38, rolling friction is formed between the two, and the limiting wheel 38 can provide a soft and effective lateral support force, constraining the circuit board 4 in a predetermined lateral position without scratching its side edges.

[0054] The working principle of the horizontal non-contact circuit board production equipment provided in this embodiment is as follows: After the equipment is started, the main drive motor 371 and the water pump 51 in the liquid circulation system 5 start working synchronously. On one side of the drive mechanism 3, the rotational power of the main drive motor 371 is output through the drive bevel gear 373 on its motor shaft 372 and transmitted to the spur-bevel gear assembly 341 in the gear transmission structure 34 that meshes with it. This assembly converts the rotational motion parallel to the horizontal conveying path 11 into rotation perpendicular to the horizontal conveying path 11 and directly drives the lower drive shaft 32, which is coaxially connected to it, to rotate. At the same time, the spur gear part of the spur-bevel gear assembly 341 drives the transmission spur gear 342 that meshes with it to rotate, thereby driving the upper drive shaft 33 to rotate synchronously with the lower drive shaft 32 at the same speed but in the opposite direction. As a result, all the upper conveying wheels 311 and lower conveying wheels 312 fixed on the upper drive shaft 33 and lower drive shaft 32 are driven into the standby working state.

[0055] The circuit board 4 to be processed is fed into the equipment inlet, and its two process edges 41 are clamped by the first pair of synchronously rotating upper conveyor wheels 311 and lower conveyor wheels 312. Under the coordinated action of the two sets of conveyor wheels 31, the circuit board 4 is stably pushed forward along the horizontal conveying path 11.

[0056] Meanwhile, on one side of the liquid circulation system 5, the water pump 51 draws chemical solution from the collection area of ​​the medicine tank 12 at the bottom of the body 1, pressurizes it, and forces it through the filter 52 for filtration, effectively removing impurities such as solid particles and chemical crystals. The cleaned solution is distributed to the upper main pipe 23 and the lower main pipe 24 via the main delivery pipe 25, and further evenly delivered to the arrayed upper spray pipe 21 and lower spray pipe 22. Finally, the solution is evenly sprayed onto the upper and lower surfaces of the circuit board 4, which is moving forward, through the nozzles on each spray pipe. After spraying, the solution drips naturally under gravity and is collected back into the medicine tank 12 below, realizing closed-loop recycling of the solution.

[0057] Example 2 Reference Figure 9 Because the thin circuit board 4 itself lacks rigidity, if it is only held by clamping from both sides, the central area is very prone to sagging due to its own weight or the impact force of the sprayed liquid, which seriously affects the processing quality. Therefore, this embodiment is basically the same as embodiment 1, except that this embodiment provides a device solution suitable for conveying the thin circuit board 4.

[0058] In this embodiment, in addition to reserving process edges 41 on the left and right sides, the thin circuit board 4 also has a process edge 41 located in the center along the length direction on its geometric center line.

[0059] In this embodiment, the number of conveyor wheel sets 31 is preferably three sets, with two sets located on both sides of the horizontal conveying path 11 and the third set located in the middle of the horizontal conveying path 11. The three sets of conveyor wheel sets 31 share a lower drive shaft 32 and an upper drive shaft 33. The third set of conveyor wheel sets 31 also includes multiple upper conveyor wheels 311 and lower conveyor wheels 312, used to clamp the process edge 41 located in the center of the thin circuit board 4. The third set of conveyor wheel sets 31 provides a key intermediate support point for the thin circuit board 4, forming a stable multi-point support system, which physically suppresses the bending deformation of the board and ensures that even ultra-thin or large-sized circuit boards 4 can maintain ideal flatness under high-speed conveying and strong spraying conditions.

[0060] Specifically, similar to Embodiment 1, each conveying wheel group 31 in this embodiment may also be equipped with the aforementioned limiting wheel 38 to further enhance the reliability of the three-point support system in lateral positioning.

[0061] The working principle of the horizontal non-contact production circuit board equipment provided in this embodiment is basically the same as that in Embodiment 1, except that a new set of conveyor wheels 31 is added to clamp the process edge in the center of the circuit board 4.

[0062] Example 3 like Figure 10-13 as well as Figure 17 Based on the structure of Embodiment 1 or Embodiment 2, this embodiment has made adaptive optimization to the conveyor wheel group 31 located on both sides of the conveying path, that is, the floating component 35 is introduced, so that the equipment can automatically adapt to circuit boards 4 with different thicknesses or with slight thickness tolerances.

[0063] In this embodiment, the lower conveyor wheel 312 is installed in the same way as in the previous embodiment, that is, it is fixed on the lower drive shaft 32 as a reference. However, each upper conveyor wheel 311 in the two side conveyor wheel sets 31 is no longer directly fixed on the upper drive shaft 33, but is connected and driven by an independent floating component 35.

[0064] Specifically, the floating assembly 35 includes a floating lever arm 351, an elastic element 352, and a transmission chain consisting of a driving gear 353, an idler gear 355, and a driven gear 354. One end of the floating lever arm 351 has a shaft hole, through which the floating lever arm 351 is rotatably mounted on the upper drive shaft 33, allowing it to swing up and down at a small angle with the upper drive shaft 33 as the fulcrum. The other end is preferably a U-shaped structure, with symmetrical through holes on the side wall of the U-shaped structure. The upper conveying wheel 311 passes through the through holes via its own axle and is rotatably mounted inside the U-shaped structure of the floating lever arm 351. An elastic element 352 is disposed above the floating lever arm 351, with one end connected to the floating lever arm 351 and the other end connected to an extension plate 362 disposed on the top of the support plate 361. One end of the extension plate 362 is fixedly connected to the top of the support plate, and the other end is located in the area above the floating lever arm 351. Thus, the elastic element 352 can apply a continuous and adjustable elastic downward pressure to the floating lever arm 351. In this embodiment, the elastic element 352 is preferably a compression spring.

[0065] More specifically, to maintain stable power transmission during the floating process, a drive gear 353 is fixedly mounted on the upper drive shaft 33, and the drive gear 353 is located on the side of the upper conveyor wheel 311 near the support plate 361. A driven gear 354 is fixedly mounted on the axle of the upper conveyor wheel 311. An idler gear 355 is rotatably mounted on the floating lever arm 351, between the drive gear 353 and the driven gear 354. This idler gear 355 engages with both the drive gear 353 and the driven gear 354. When a circuit board 4 enters between the upper conveyor wheel 311 and the lower conveyor wheel 312, its thickness forces the upper conveyor wheel 311 to lift upwards, causing the floating lever arm 351 to swing upwards around the upper drive shaft 33 and compress the elastic element 352. During this process, the idler gear 355 moves with the swing of the lever arm 351, but it always acts as a power bridge connecting the drive gear 353 and the driven gear 354. In this way, the rotational power of the upper drive shaft 33 can be stably transmitted to the upper conveyor wheel 311 through this transmission chain, ensuring that the transmission of driving torque is never interrupted while adapting to different thicknesses.

[0066] In this embodiment, to achieve lateral positioning of the circuit board 4 while adapting to different board thicknesses during floating, a downwardly extending limiting plate 356 is integrally formed on one side wall of the floating lever arm 351 near the support plate 361. The inner side wall of the limiting plate 356 serves as a functional stop, arranged parallel to the side wall of the process edge 41 of the circuit board 4, maintaining a small working gap with it. The bottom edge height of the limiting plate 356 is designed to be lower than the upper surface of the process edge 41, but higher than the outer periphery of the lower conveyor wheel 312, to ensure that it does not interfere with the lower conveyor wheel 312 in any floating position. When the circuit board 4 shifts laterally, the side wall of its process edge 41 contacts the inner side wall of the limiting plate 356, thereby being blocked and corrected, ensuring that it travels along the correct path. To reduce friction, the inner side wall of the limiting plate 356 is preferably a smooth surface with low friction characteristics, preferably made of polytetrafluoroethylene or surface-coated.

[0067] Example 4 like Figure 14-17 This embodiment, based on embodiment 3, further adds online self-maintenance and optimization functions to ensure that the equipment maintains optimal working condition and high cleanliness during long-term, continuous production. The structure of this embodiment can be built on the basis of embodiment 3, that is, while including the floating component 35 and the limiting plate 356, it further integrates online self-maintenance functions.

[0068] In this embodiment, multiple self-cleaning components 6 are added to the inner walls of the side support plates 361, that is, at the position immediately adjacent to each conveyor wheel assembly 31. Each self-cleaning component 6 is responsible for cleaning a pair of upper conveyor wheels 311 and lower conveyor wheels 312 in real time.

[0069] Specifically, each self-cleaning component 6 is an integral structure, including a main body 61 and a brush head 62 connected to the main body. The brush head 61 is divided into an upper scraper 621 and a lower scraper 622, which are preferably made of wear-resistant and corrosion-resistant polytetrafluoroethylene. Both the upper scraper 621 and the lower scraper 622 are hollow, groove-shaped structures, and their internal channels constitute the drainage channels 623. To accommodate the opposite rotation directions of the upper conveyor wheel 311 and the lower conveyor wheel 312, the working edges of the upper scraper 621 and the lower scraper 622 are both located on the side where the conveyor wheel rotates and scrapes away dirt. That is, if the upper scraper 621 is attached to the left side of the outer circumference of the upper conveyor wheel 311, then the corresponding lower scraper 622 is attached to the right side of the outer circumference of the lower conveyor wheel 312, so as to ensure that both can effectively perform the scraping action.

[0070] More specifically, the upper scraper 621 and lower scraper 622 extend downwards and smoothly converge into a single main body 61, with the internal drainage channels 623 also merging accordingly. The outlet end of the main body 61 is bent to align with the medicine tank 12 below. The sidewalls of the main body 61 are fixedly connected to the support plate 361 to provide stable support. During equipment operation, as the upper conveyor wheel 311 and lower conveyor wheel 312 rotate, the upper scraper 621 and lower scraper 622 continuously scrape the medicine crystals and other dirt adhering to the wheel surface into their respective drainage channels 623. The dirt flows downwards along the channels, merges within the main body 61, and is ultimately guided back to the medicine tank 12.

[0071] Furthermore, in order to enhance the drainage capacity of the lower conveying wheel 312 and prevent excessive accumulation of the liquid medicine at the clamping interface, multiple drainage grooves 3121 are provided on the outer peripheral surface of the lower conveying wheel 312. The two sets of drainage grooves (3121) are inclined in opposite directions, forming a V-shaped arrangement, so as to generate centrifugal force discharged from the middle of the wheel body to both sides when rotating.

[0072] Specifically, these drainage grooves 3121 are symmetrically distributed on both sides of the outer peripheral surface of the lower conveyor wheel 312. The extension direction of the drainage grooves 3121 is set at an acute angle to the wheel axis, and the projections of the drainage grooves 3121 on the circumference of the wheel overlap each other to ensure that the circuit board 4 maintains continuous contact with the outer peripheral surface of the lower conveyor wheel 312 during the conveying process.

[0073] More specifically, an inclined drainage groove 3121 at an acute angle to the axis is formed on the outer circumferential surface of the lower conveyor wheel 312, and the projections of the grooves on the circumference are defined to overlap. Structurally, the inclined design ensures that the linear contact area between the circuit board 4 and the lower conveyor wheel 312 is always intersecting with the direction of the groove rather than parallel. Combined with the limitation of the overlapping projections, it ensures that at any instant of the wheel's rotation, the bottom surface of the circuit board 4 is always continuously supported by the solid part of the outer circumference of the wheel. This structure utilizes the inclined angle of the drainage groove 3121 to generate a centrifugal guiding effect during rotation, quickly discharging the accumulated liquid from the center of the contact surface to both sides of the axial direction to prevent slippage. It also eliminates the "suspended-impact" high-frequency vibration that may be caused by the straight groove through continuous solid support, thereby evenly dispersing the contact stress. While ensuring efficient drainage, it avoids indentations or mechanical damage to the surface of the circuit board 4 caused by stress concentration.

[0074] The working principle of the horizontal non-contact circuit board production equipment provided in this embodiment is as follows: When performing the basic workflow of conveying and spraying circuit board 4, the equipment's added online self-maintenance and optimization functions are mainly achieved through the synergistic action of the self-cleaning component 6 and the drainage trough 3121.

[0075] When the equipment operates continuously for extended periods, the sprayed chemical solution may adhere to the surfaces of the continuously rotating upper conveyor wheel 311 and lower conveyor wheel 312, potentially forming crystals or accumulating dirt. At this time, the self-cleaning component 6, which is in close contact with the upper conveyor wheel 311 and lower conveyor wheel 312, begins to function.

[0076] As the upper conveyor wheel 311 and the lower conveyor wheel 312 rotate, their outer circumferential surfaces sweep across the cutting edges of the upper scraper 621 and the lower scraper 622, continuously scraping away the drug crystals and dirt adhering to the wheel surfaces. The scraped solid and liquid waste directly enters the drainage channels 623 inside the upper scraper 621 and the lower scraper 622, and flows downward along the channels under the action of gravity. After converging in the integrated main body 61, it is uniformly discharged into the drug tank 12 below.

[0077] Meanwhile, the drainage grooves 3121 on the lower conveyor wheel 312 play an active role in drainage. When the lower conveyor wheel 312 rotates, the inclined grooves symmetrically arranged on its surface will actively discharge excess liquid near the clamping interface from the middle to both sides of the axial direction of the lower conveyor wheel 312.

[0078] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A horizontal, non-contact production equipment for circuit boards, characterized in that, include: Body (1), the interior of which defines a horizontal transport path (11); A spraying mechanism (2), disposed within the body (1), is used to spray liquid medicine onto the circuit board (4) moving along the horizontal conveying path (11); and A drive mechanism (3) is disposed inside the body (1) and arranged along both sides or the central area of ​​the horizontal conveying path (11). The drive mechanism (3) includes at least two sets of conveying wheels (31). Each set of conveying wheels (31) includes an upper conveying wheel (311) and a lower conveying wheel (312) for clamping the process edge (41) of the circuit board (4) and driving the circuit board (4) to move along the horizontal conveying path (11).

2. The equipment for horizontal non-contact production of circuit boards according to claim 1, characterized in that, The drive mechanism (3) further includes a lower drive shaft (32), an upper drive shaft (33), and a gear transmission structure (34). The rotation axis of the lower drive shaft (32) is perpendicular to the extension direction of the horizontal conveying path (11), and a plurality of lower conveying wheels (312) are fixedly mounted thereon at intervals. The rotation axis of the upper drive shaft (33) is parallel to the lower drive shaft (32), and a plurality of upper conveying wheels (311) are fixedly mounted thereon at intervals. The gear transmission structure (34) is meshed between the lower drive shaft (32) and the upper drive shaft (33) to drive them to rotate synchronously.

3. The equipment for horizontal non-contact production of circuit boards according to claim 1, characterized in that, The spraying mechanism (2) includes an upper spray pipe (21) and a lower spray pipe (22), which are located above and below the horizontal conveying path (11) respectively, and are used to spray liquid medicine onto the upper and lower surfaces of the circuit board (4) respectively.

4. The equipment for horizontal non-contact production of circuit boards according to claim 3, characterized in that, It also includes a liquid circulation system (5) connected to the spraying mechanism (2). The liquid circulation system (5) includes a water pump (51) and a filter (52). The water pump (51) is connected to the upper end of the filter (52). One end of the lower part of the filter (52) is connected to the spraying mechanism (2), and the other end is connected to the medicine tank (12) located at the lower part of the machine body (1).

5. The equipment for horizontal non-contact production of circuit boards according to claim 1, characterized in that, One of the conveyor wheel sets (31) of the drive mechanism (3) is set on the geometric center line of the horizontal conveying path (11) to clamp and support a process edge (41) in the center of the circuit board (4).

6. The equipment for horizontal non-contact production of circuit boards according to claim 1, characterized in that, It also includes multiple sets of self-cleaning components (6), each set of self-cleaning components (6) includes a main body (61) and a brush head (62) connected to the main body (61). The working edge of the brush head (62) abuts against the outer peripheral surface of the upper conveyor wheel (311) or the lower conveyor wheel (312) to scrape off the dirt attached thereto by means of the rotation of the conveyor wheel itself.

7. The equipment for horizontal non-contact production of circuit boards according to claim 6, characterized in that, The brush head (62) includes an upper scraper (621) and a lower scraper (622), which respectively fit against the outer peripheral surfaces of the upper conveyor wheel (311) and the lower conveyor wheel (312). The upper scraper (621) and the lower scraper (622) are provided with a flow channel (623) inside. The upper scraper (621) and the lower scraper (622) extend downward and converge to form the main body (61). The end of the main body (61) is aligned with the medicine tank (12).

8. The equipment for horizontal non-contact production of circuit boards according to claim 1, characterized in that, A drainage groove (3121) is provided on the outer peripheral surface of the lower conveyor wheel (312). The drainage groove (3121) is symmetrically arranged on both sides of the outer peripheral surface of the lower conveyor wheel (312) and is arranged at an inclination so that when the lower conveyor wheel (312) rotates, the liquid medicine attached to it will be actively discharged from the middle to both sides.

9. The equipment for horizontal non-contact production of circuit boards according to claim 2, characterized in that, The drive mechanism (3) further includes a floating component (35), which includes a floating lever arm (351) and an elastic element (352). One end of the floating lever arm (351) is sleeved on the upper drive shaft (33), and the other end is connected to the upper conveyor wheel (311). One end of the elastic element (352) is connected to the upper surface of the floating lever arm (351), and the other end is connected to a stationary position of the machine body (1) to apply an elastic downward pressure to the floating lever arm (351), so that the upper conveyor wheel (311) can float up and down relative to the lower conveyor wheel (312) to adapt to circuit boards (4) of different thicknesses.

10. The equipment for horizontal non-contact production of circuit boards according to claim 9, characterized in that, The floating assembly (35) further includes a drive gear (353) fixed on the upper drive shaft (33), a driven gear (354) fixed on the axle of the upper conveyor wheel (311), and an idler wheel (355) mounted on the floating lever arm (351). The idler wheel (355) is located between the drive gear (353) and the driven gear (354) and meshes with both of them simultaneously, thereby transmitting the rotation of the upper drive shaft (33) to the upper conveyor wheel (311) in the same direction.

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