Automatic cleaning mechanism for PCB (Printed Circuit Board)

Abstract

The utility model relates to the field of PCB circuit board cleaning, and discloses a PCB circuit board automatic cleaning mechanism which comprises an installation shell, a cleaning shell is fixedly installed on the top face of the installation shell in an embedded mode, a protective cover plate is fixedly installed at the position, above the cleaning shell, of the top face of the installation shell, a conveying chain is arranged in the cleaning shell, and the conveying chain is connected with the cleaning shell. A chain wheel driving mechanism connected with the conveying chain is arranged in the cleaning shell, a limiting and fixing assembly is arranged on the outer surface of the conveying chain, and the limiting and fixing assembly comprises a first mounting support, side limiting wheels, a second mounting support, bottom limiting wheels, limiting grooves and a PCB body; according to the device, through cooperation of side limiting wheels, bottom limiting wheels, limiting grooves and rubber rings, stable limiting of the PCB can be achieved, and the cleaning efficiency and the cleaning effect of the PCB are remarkably improved in cooperation with the multi-nozzle double-face cleaning function of the automatic cleaning mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of PCB circuit board cleaning technology, specifically an automatic PCB circuit board cleaning mechanism. Background Technology

[0002] A PCB (Printed Circuit Board) is a provider of electrical connections for electronic components. It consists of an insulating board as a substrate, on which copper is deposited and complex conductive lines are etched using specific processes. It also includes pads, vias, and other structures for mounting electronic components. Widely used in various electronic products, PCBs often retain impurities such as flux, solder dross, oil, and dust during manufacturing. These residues can affect the electrical performance of the PCB, leading to short circuits and poor contact. They can also corrode the PCB over long-term use, reducing its lifespan. Furthermore, these residues do not meet the quality and reliability requirements of electronic products. Therefore, PCBs need to be cleaned to ensure their performance, quality, and lifespan.

[0003] For example, utility model patent CN221010417U discloses a PCB circuit board cleaning machine, including a cleaning box with a cleaning channel. The cleaning channel has a conveying mechanism, a high-pressure nozzle, and a drainage channel inside. The conveying mechanism is connected to a drive motor for linkage. The conveying mechanism includes several conveying shafts and several adjusting shafts, which are arranged alternately along the conveying direction of the conveying mechanism. The adjusting shafts are connected to several reset blocks, and there are rinsing stations between the reset blocks. The position of the reset blocks corresponds to the adjustment interval, and the top surface of the reset blocks narrows to form a conical structure. This achieves the function of supporting wheels to support the PCB board for conveying, and the reset blocks to move the PCB board affected by the water flow, guiding the PCB board back to the rinsing station, so that the solvent on the PCB board can be completely cleaned, ensuring the efficiency of subsequent processing.

[0004] However, in actual use, it was found that the device reduces movement by using anti-slip protrusions on the surface of the support wheel to engage with the edge of the through hole on the PCB board.

[0005] However, because the anti-slip bumps of this device are only raised structures on the surface of the support wheel, the contact area with the edge of the PCB circuit board's through hole is small, making it difficult to resist the impact of high-pressure water flow. This causes the circuit board to easily shift, resulting in incomplete cleaning. At the same time, abnormal movement of the circuit board can easily interfere with the conveying mechanism, causing jamming and blockage, reducing production efficiency. Furthermore, its single-sided cleaning function cannot meet the needs of double-sided cleaning, limiting the application range and processing capacity of the equipment. Therefore, an automatic PCB circuit board cleaning mechanism is provided. Utility Model Content

[0006] The purpose of this invention is to provide an automatic cleaning mechanism for PCB circuit boards in order to solve the problems mentioned above.

[0007] The technical solution adopted by this utility model is as follows: an automatic cleaning mechanism for PCB circuit boards includes a mounting housing, a cleaning housing is fixedly installed on the top surface of the mounting housing, a protective cover is fixedly installed on the top surface of the mounting housing above the cleaning housing, a conveyor chain is provided inside the cleaning housing, a sprocket drive mechanism connected to the conveyor chain is provided inside the cleaning housing, and a limit fixing component is provided on the outer surface of the conveyor chain.

[0008] The limiting and fixing assembly includes a first mounting bracket, a side limiting wheel, a second mounting bracket, a bottom limiting wheel, a limiting groove, and a PCB circuit board body. Multiple first mounting brackets are evenly spaced and arrayed on the outer surface of the conveyor chain, and each of the first mounting brackets has a side limiting wheel rotatably connected inside. Multiple second mounting brackets are fixedly mounted on the outer surface of the conveyor chain on the side of the first mounting bracket, and each of the second mounting brackets has a bottom limiting wheel fixedly mounted inside. Limiting grooves are formed on the outer surfaces of both the side and bottom limiting wheels, and a PCB circuit board body is inserted into the limiting groove. An automatic cleaning mechanism for rinsing the PCB circuit board body is provided inside the protective cover.

[0009] In a preferred embodiment, the automatic cleaning mechanism includes a nozzle supply pipe, a cleaning nozzle, a connecting pipe, a delivery pipe, a storage tank, a high-pressure pump, and a supply pipeline. Multiple nozzle supply pipes are evenly spaced and arrayed inside the protective cover, with a cleaning nozzle fixedly installed at one end of each nozzle supply pipe that is close to the others. A connecting pipe is fixedly installed on the outer surface of each nozzle supply pipe, with one end extending to the outside of the protective cover. A delivery pipe is fixedly installed at the end of the connecting pipe extending to the outside of the protective cover. A storage tank is provided inside the mounting housing, and a high-pressure pump is provided on one side of the mounting housing. The inlet end of the high-pressure pump extends into the mounting housing and is welded to one side of the storage tank. A supply pipeline is fixedly installed at the outlet end of the high-pressure pump, with one end of the supply pipeline welded to the outer surface of the delivery pipe.

[0010] In a preferred embodiment, a U-shaped air supply pipe is fixedly installed inside the protective cover. Multiple air jet holes are symmetrically opened on the outer surface of the U-shaped air supply pipe. An air supply connection pipe is fixedly installed near the top outer surface of the U-shaped air supply pipe. One end of the air supply connection pipe extends to the outside of the protective cover and is connected to an external air pump.

[0011] In a preferred embodiment, a recovery drain pipe is fixedly installed on the bottom surface of the cleaning housing, and one end of the recovery drain pipe extends to the outside of the housing and is connected to an external waste liquid recovery tank.

[0012] In a preferred embodiment, a rubber ring is fixedly installed inside the limiting groove.

[0013] In a preferred embodiment, a lockable movable wheel is rotatably connected to the bottom surface of the mounting housing near the corner, and an adjustable support foot is provided on the bottom surface of the mounting housing on the side of the lockable movable wheel.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] 1. In this utility model, due to the adoption of the above-mentioned solution, the operator first inserts the bottom of the PCB circuit board body into the limiting groove of the limiting and fixing component. At this time, the side limiting wheel and the bottom limiting wheel are precisely matched with the limiting groove, and the circuit board is fixed from the side and bottom by the friction provided by the internal rubber ring, ensuring its stability when installed vertically. Subsequently, the sprocket drive mechanism drives the conveyor chain to rotate, and smoothly sends the circuit board into the protective cover for automatic cleaning. This device can achieve stable positioning of the PCB circuit board by the cooperation of the side limiting wheel, the bottom limiting wheel, the limiting groove and the rubber ring. Combined with the multi-nozzle double-sided cleaning function of the automatic cleaning mechanism, it significantly improves the cleaning efficiency and cleaning effect of the PCB circuit board. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a side sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the side limiting wheel structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the nozzle supply pipe of this utility model before installation.

[0020] The diagram shows the following components: 1. Mounting housing; 2. Cleaning housing; 3. Protective cover; 4. Conveyor chain; 5. Sprocket drive mechanism; 6. Limiting and fixing assembly; 601. Mounting bracket one; 602. Side limiting wheel; 603. Mounting bracket two; 604. Bottom limiting wheel; 605. Limiting groove; 606. PCB circuit board body; 7. U-shaped air supply pipe; 8. Air jet hole; 9. Air supply connection pipe; 10. Automatic cleaning mechanism; 101. Nozzle liquid supply pipe; 102. Cleaning nozzle; 103. Connecting pipe; 104. Conveying pipe; 105. Liquid storage tank; 106. High-pressure liquid pump; 107. Liquid supply pipeline; 11. Recovery drain pipe; 12. Rubber ring; 13. Adjustable support foot. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] refer to Figures 1-4 As shown, an automatic PCB circuit board cleaning mechanism includes a mounting housing 1. Lockable casters are rotatably connected to the bottom surface of the mounting housing 1 near its corners. Adjustable feet 13 are provided on the bottom surface of the mounting housing 1, located on the side of the lockable casters. The lockable casters facilitate the overall movement of the cleaning mechanism, allowing the equipment to be flexibly moved between different working areas, thus improving its usability. The adjustable feet 13 allow for fine-tuning of the horizontal position of the mounting housing 1, ensuring the equipment remains stable during use and preventing uneven ground from affecting the cleaning effect, thereby enhancing the stability and applicability of the equipment.

[0023] refer to Figures 1-4As shown, a cleaning housing 2 is fixedly installed on the top surface of the mounting housing 1. A protective cover 3 is fixedly installed on the top surface of the mounting housing 1 above the cleaning housing 2. A conveyor chain 4 is installed inside the cleaning housing 2, and a sprocket drive mechanism 5 connected to the conveyor chain 4 is installed inside the cleaning housing 2. A limit fixing component 6 is installed on the outer surface of the conveyor chain 4. The cleaning housing 2 and the protective cover 3 provide a closed working space for cleaning PCB circuit boards, preventing wastewater from splashing during the cleaning process and keeping the working environment clean. The protective cover 3 further protects the internal cleaning area. The components prevent external debris from entering and also provide a certain degree of safety protection for operators. The sprocket drive mechanism 5 consists of two sprockets: one is a motor-driven active sprocket, and the other is a driven sprocket that rotates through a bearing. Both the active and driven sprockets are meshed with the conveyor chain 4, which facilitates the stable operation of the conveyor chain 4 and realizes the automatic conveying of PCB circuit boards, improving cleaning efficiency. The setting of the limit fixing component 6 limits and fixes the PCB circuit boards to ensure that the circuit boards will not be displaced during the cleaning process, ensuring the uniformity and thoroughness of cleaning.

[0024] refer to Figures 1-4 As shown, the limiting and fixing assembly 6 includes a first mounting bracket 601, a side limiting wheel 602, a second mounting bracket 603, a bottom limiting wheel 604, a limiting groove 605, and a PCB circuit board body 606. Multiple first mounting brackets 601 are evenly spaced and arrayed on the outer surface of the conveyor chain 4, and the side limiting wheels 602 are rotatably connected inside each of the multiple first mounting brackets 601. The first mounting bracket 601 and the second mounting bracket 603 provide a stable mounting base for the side limiting wheels 602 and the bottom limiting wheels 604. The side limiting wheels 602 can limit the sides of the PCB circuit board to prevent the circuit board from shifting laterally during the conveying process. Together with the bottom limiting wheels 604, the circuit board is fixed from multiple directions, effectively enhancing the limiting and fixing effect.

[0025] refer to Figures 1-4As shown, multiple mounting brackets 603 are fixedly installed on the outer surface of the conveyor chain 4 on the side of the mounting bracket 601. Bottom limiting wheels 604 are fixedly installed inside each of the mounting brackets 603. Limiting grooves 605 are formed on the outer surfaces of both the side limiting wheels 602 and the bottom limiting wheels 604. Rubber rings 12 are fixedly installed inside the limiting grooves 605. A PCB circuit board body 606 is inserted into the limiting groove 605. An automatic cleaning mechanism 10 for rinsing the PCB circuit board body 606 is provided inside the protective cover plate 3. The side limiting wheels 602 can rotate, thus facilitating the insertion of the PCB circuit board body 606 into the limiting grooves 605. Inside the 05, the bottom limiting wheel 604 is fixedly installed to provide stable support for the PCB circuit board body 606. Through the combined action of the bottom limiting wheel 604 and the side limiting wheel 602, the PCB circuit board can be fixed in all directions to ensure its stable position during cleaning. The limiting groove 605 is adapted to the PCB circuit board body 606 to further improve the limiting accuracy. The rubber ring 12 can increase the friction between the limiting groove 605 and the circuit board, and at the same time play a buffering role to avoid damage to the circuit board. The automatic cleaning mechanism 10 can automatically rinse the PCB circuit board without manual intervention, which improves the automation level and work efficiency of cleaning.

[0026] refer to Figures 1-4 As shown, the automatic cleaning mechanism 10 includes a nozzle supply pipe 101, a cleaning nozzle 102, a connecting pipe 103, a delivery pipe 104, a storage tank 105, a high-pressure pump 106, and a supply pipe 107. Multiple nozzle supply pipes 101 are installed in an equally spaced array inside the protective cover plate 3, and cleaning nozzles 102 are fixedly installed at the ends of the multiple nozzle supply pipes 101 that are close to each other. Through the equally spaced array distribution of the multiple cleaning nozzles 102, the PCB circuit board body 606 can be rinsed from multiple angles, ensuring that the cleaning fluid can evenly cover the surface of the circuit board without leaving any blind spots, thus improving the cleaning effect and quality. The nozzle supply pipe 101, connecting pipe 103, delivery pipe 104, storage tank 105, high-pressure pump 106, and supply pipe 107 form a complete supply system, which can stably provide cleaning fluid to the cleaning nozzles 102, ensuring the continuous operation of the cleaning work.

[0027] refer to Figures 1-4As shown, a connecting pipe 103 is fixedly installed on the outer surface of the nozzle supply pipe 101. One end of the connecting pipe 103 extends to the outside of the protective cover plate 3, and a delivery pipe 104 is fixedly installed at the other end of the connecting pipe 103 extending to the outside of the protective cover plate 3. A liquid storage tank 105 is provided inside the mounting housing 1. A high-pressure liquid pump 106 is provided on one side of the mounting housing 1. The inlet end of the high-pressure liquid pump 106 extends into the inside of the mounting housing 1 and is welded to one side of the liquid storage tank 105. The outlet end of the high-pressure liquid pump 106 is fixedly installed... The system is equipped with a liquid supply pipe 107, one end of which is welded to the outer surface of the delivery pipe 104. The high-pressure liquid pump 106 provides sufficient pressure to spray the cleaning fluid at high pressure, enhancing the cleaning fluid's ability to flush away stains on the circuit board surface and improving cleaning efficiency. The storage tank 105 can store a large amount of cleaning fluid, reducing the frequency of adding cleaning fluid and ensuring the continuity of cleaning work. The connection pipe 103, delivery pipe 104, and liquid supply pipe 107 ensure smooth delivery of the cleaning fluid.

[0028] refer to Figures 1-4 As shown, a U-shaped air supply pipe 7 is fixedly installed inside the protective cover plate 3. Multiple air jet holes 8 are symmetrically opened on the outer surface of the U-shaped air supply pipe 7. An air supply connection pipe 9 is fixedly installed near the top outer surface of the U-shaped air supply pipe 7. One end of the air supply connection pipe 9 extends to the outside of the protective cover plate 3 and is connected to an external air pump. With the setting of the U-shaped air supply pipe 7 and the air jet holes 8, air can be sprayed onto the surface of the PCB circuit board after cleaning to quickly dry the residual moisture on the surface of the circuit board, preventing the circuit board from rusting or short circuits due to moisture residue, thus ensuring the quality and performance of the circuit board. The air supply connection pipe 9 connected to the external air pump can stably supply air, ensuring a stable and reliable air spraying effect.

[0029] refer to Figures 1-4 As shown, a recovery drain pipe 11 is fixedly installed on the bottom surface of the cleaning housing 2. One end of the recovery drain pipe 11 extends to the outside of the housing 1 and connects to the external waste liquid recovery tank. Through the recovery drain pipe 11, the wastewater generated during the cleaning process can be discharged in a timely manner, keeping the inside of the cleaning housing 2 clean and preventing wastewater accumulation from affecting the cleaning effect. The wastewater is discharged into the external waste liquid recovery tank, which facilitates centralized treatment of the wastewater, meets environmental protection requirements, and reduces pollution to the environment.

[0030] The implementation principle of this utility model's automatic PCB circuit board cleaning mechanism is as follows: The user inserts the bottom of the PCB circuit board body 606 into the limiting groove 605 of the limiting and fixing assembly 6. At this time, the side limiting wheel 602 and the bottom limiting wheel 604 precisely engage with the limiting groove 605, and the circuit board is fixed from the side and bottom by the friction provided by the internal rubber ring 12, ensuring its stability during vertical installation. Subsequently, the active sprocket of the sprocket drive mechanism 5 rotates under the drive of the motor, which in turn drives the driven sprocket to rotate the conveyor chain 4, smoothly feeding the circuit board into the protective cover plate 3. At this time, the high-pressure liquid pump 106 draws cleaning fluid from the storage tank 105, and delivers it through the liquid supply pipe 107, the conveying pipe 104, and the connecting... Pipe 103 and nozzle supply pipe 101 deliver the cleaning nozzle 102. Multiple cleaning nozzles 102 spray high-pressure cleaning fluid to achieve efficient double-sided cleaning of the circuit board. The wastewater generated during cleaning is discharged into an external waste liquid recovery tank through the recovery drain pipe 11. After cleaning, an external air pump supplies air to the U-shaped air supply pipe 7 through the air supply connection pipe 9. The air jet hole 8 sprays air to quickly dry the surface moisture of the circuit board. Finally, the circuit board is sent out of the cleaning mechanism by the conveyor chain 4, completing the fully automated cleaning process. The device is stably limited by the side limit wheel 602, the bottom limit wheel 604, the limit groove 605 and the rubber ring 12, and combined with the multi-nozzle double-sided cleaning function of the automatic cleaning mechanism 10, which significantly improves the cleaning efficiency and cleaning effect of the PCB circuit board.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic cleaning mechanism for PCB circuit boards, comprising a mounting housing (1), characterized in that: A cleaning housing (2) is embedded and fixedly installed on the top surface of the mounting housing (1). A protective cover plate (3) is fixedly installed on the top surface of the mounting housing (1) above the cleaning housing (2). A conveying chain (4) is provided inside the cleaning housing (2). A sprocket drive mechanism (5) connected to the conveying chain (4) is provided inside the cleaning housing (2). A limit fixing component (6) is provided on the outer surface of the conveying chain (4). The limiting and fixing assembly (6) includes a first mounting bracket (601), a side limiting wheel (602), a second mounting bracket (603), a bottom limiting wheel (604), a limiting groove (605), and a PCB circuit board body (606). Multiple first mounting brackets (601) are evenly spaced and arrayed on the outer surface of the conveyor chain (4), and each of the multiple first mounting brackets (601) is rotatably connected to a side limiting wheel (602). The outer surface of the conveyor chain (4) is located within the first mounting bracket (601). Multiple mounting brackets (603) are fixedly installed on the side of the PCB circuit board, and bottom limiting wheels (604) are fixedly installed inside the multiple mounting brackets (603). Limiting grooves (605) are opened on the outer surfaces of the side limiting wheels (602) and the bottom limiting wheels (604). The PCB circuit board body (606) is inserted into the limiting groove (605). An automatic cleaning mechanism (10) for rinsing the PCB circuit board body (606) is provided inside the protective cover (3).

2. The PCB circuit board automatic cleaning mechanism as described in claim 1, characterized in that: The automatic cleaning mechanism (10) includes a nozzle supply pipe (101), a cleaning nozzle (102), a connecting pipe (103), a delivery pipe (104), a storage tank (105), a high-pressure pump (106), and a supply pipeline (107). Multiple nozzle supply pipes (101) are arranged in an equally spaced array inside the protective cover (3), and a cleaning nozzle (102) is fixedly installed at one end of each nozzle supply pipe (101) that is close to the others. A connecting pipe (103) is fixedly installed on the outer surface of each nozzle supply pipe (101), and one end of the connecting pipe (103) extends to the protective cover. Outside the cover plate (3), a conveying pipe (104) is fixedly installed at one end of the connecting pipe (103) extending to the outside of the protective cover plate (3). A liquid storage tank (105) is provided inside the mounting housing (1). A high-pressure liquid pump (106) is provided on one side of the mounting housing (1). The inlet end of the high-pressure liquid pump (106) extends into the inside of the mounting housing (1) and is welded to one side of the liquid storage tank (105). A liquid supply pipe (107) is fixedly installed at the outlet end of the high-pressure liquid pump (106). One end of the liquid supply pipe (107) is welded to the outer surface of the conveying pipe (104).

3. The automatic PCB cleaning mechanism as described in claim 1, characterized in that: A U-shaped air supply pipe (7) is fixedly installed inside the protective cover (3). Multiple air jet holes (8) are symmetrically opened on the outer surface of the U-shaped air supply pipe (7). An air supply connection pipe (9) is fixedly installed near the top outer surface of the U-shaped air supply pipe (7). One end of the air supply connection pipe (9) extends to the outside of the protective cover (3) and is connected to an external air pump.

4. The automatic PCB cleaning mechanism as described in claim 1, characterized in that: A recovery drain pipe (11) is fixedly installed on the bottom surface of the cleaning housing (2). One end of the recovery drain pipe (11) extends to the outside of the housing (1) and is connected to the external waste liquid recovery tank.

5. The automatic PCB cleaning mechanism as described in claim 1, characterized in that: A rubber ring (12) is fixedly installed inside the limiting groove (605).

6. The automatic PCB cleaning mechanism as described in claim 1, characterized in that: The bottom surface of the mounting housing (1) is rotatably connected to a lockable movable wheel near the corner, and the bottom surface of the mounting housing (1) is provided with an adjustable support foot (13) on the side of the lockable movable wheel.

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