PCB board single-sided non-contact cleaning equipment

Abstract

The utility model relates to PCB board manufacturing technical field discloses a kind of PCB board single-sided contactless cleaning equipment, including cleaning shell and connecting air pipe;The inner wall of the cleaning shell is rotatably connected with air knife, the front end outer wall of the cleaning shell is rotatably connected with rotating shaft, the outer wall of the cleaning shell is slidably connected with sliding plate, the outer wall of the rotating shaft is connected with sliding plate by linkage assembly one, the bottom side of the cleaning shell is equipped with conveyer, the drive shaft of the conveyer is connected with rotating shaft by linkage assembly two, the top side of the sliding plate is connected with the one end of air knife by gear set, the outer wall of the cleaning shell is fixedly connected with shell, in the utility model, conveyer uniform speed transports PCB board, reciprocating sliding is driven by sprocket drive sliding plate, both driving air knife reciprocating swing to realize clean airflow full coverage, switch two kinds of gas alternative injection, cooperate closed loop airflow to prevent secondary pollution, contactless cleaning can give consideration to comprehensiveness and refinement, improve cleaning quality stability.

Description

Technical Field

[0001] This utility model relates to the field of PCB board manufacturing technology, and in particular to a single-sided non-contact cleaning device for PCB boards. Background Technology

[0002] In the electronics manufacturing industry, PCB boards are the core carrier components of electronic devices, and their surface cleanliness directly affects the soldering reliability of electronic components and the overall operational stability of the equipment. As electronic devices develop towards higher precision and higher density, the requirements for the precision and non-destructive nature of single-sided PCB cleaning are becoming increasingly stringent. It is necessary to efficiently remove surface dust, minute residual impurities, and other contaminants, while avoiding physical damage or secondary contamination to the PCB board during the cleaning process.

[0003] Existing PCB single-sided cleaning equipment mostly uses a fixed-angle air knife to spray a single gas for sweeping. Its power transmission structure is prone to transmission instability, resulting in the inability to flexibly adjust the air knife spray angle, making it difficult to achieve full coverage cleaning of one side of the PCB. It is also prone to incomplete cleaning due to missed areas. Moreover, a single cleaning gas cannot meet the dual requirements of efficient removal of floating dust and fine removal of tiny residual impurities. At the same time, there is a lack of an effective impurity recovery mechanism, and the impurities generated during sweeping can easily cause secondary pollution. In addition, some equipment uses a contact cleaning method, which may cause scratch damage to the circuit on the surface of the PCB, failing to meet the cleaning requirements of high-precision PCBs. In order to address these technical problems, this application proposes a non-contact single-sided PCB cleaning equipment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a single-sided non-contact cleaning device for PCB boards. The device uses a conveyor to uniformly transport PCB boards, and a sprocket drive to drive a sliding plate to slide back and forth. This drives the air knife to swing back and forth to achieve full coverage of the cleaning airflow, while also switching between two types of gas for alternating spraying. Combined with a closed-loop airflow, it prevents secondary pollution. This non-contact cleaning method can balance comprehensiveness and precision, improving the stability of cleaning quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A single-sided non-contact cleaning device for PCB boards includes a cleaning shell and a connecting air tube;

[0007] The inner wall of the cleaning shell is rotatably connected to an air knife, the front outer wall of the cleaning shell is rotatably connected to a rotating shaft, the outer wall of the cleaning shell is slidably connected to a sliding plate, the outer wall of the rotating shaft is connected to the sliding plate through a linkage component one, a conveyor is installed on the bottom side of the cleaning shell, the drive shaft of the conveyor is connected to the rotating shaft through a linkage component two, the top side of the sliding plate is connected to one end of the air knife through a gear set, and an outer shell is fixedly connected to the outer wall of the cleaning shell.

[0008] The connecting air tube is located on the outer wall of the cleaning shell, and the rear end of the slide plate is connected to the inner wall of the connecting air tube through a blocking component.

[0009] Furthermore, the linkage component includes a rotating disk fixedly connected to the outer wall of the rotating shaft, and a connecting shaft is rotatably connected to the outer wall of the rotating disk, with the rear end of the connecting shaft rotatably connected to the outer wall of the slide plate.

[0010] Furthermore, the second linkage component includes a sprocket one fixedly connected to the outer wall of the conveyor drive shaft, a sprocket two fixedly connected to the middle end of the rotating shaft, and a chain connecting the sprocket one and the sprocket two.

[0011] Furthermore, the gear set includes a toothed plate fixedly connected to the top side of the slide plate, a fixed tube fixedly connected to the outer wall of one end of the air knife, a driven gear fixedly connected to the outer wall of the fixed tube, and the toothed plate and the driven gear are meshed together.

[0012] Furthermore, the blocking assembly includes a shaft-shaped plug disposed inside the connecting air tube, and an L-shaped connecting rod is fixedly connected to the rear end of the slide plate, the rear end of the L-shaped connecting rod being connected to the shaft-shaped plug.

[0013] Furthermore, the air knife is connected to a connecting hose and a connecting air pipe, and an air duct is fixedly connected to the top side of the cleaning shell, with the connecting hose located inside the fixed pipe.

[0014] Furthermore, an air inlet pipe is fixedly connected to the top rear end of the connecting air pipe, and an air inlet pipe is fixedly connected to the bottom rear end of the connecting air pipe.

[0015] Furthermore, sealing gaskets are provided at both the front and rear ends of the shaft-shaped plug, and a sealing ring is fixedly connected to the rear end of the connecting air pipe.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, the equipment uses a conveyor to drive the PCB board to be transported at a constant speed, ensuring the orderly progress of the cleaning process; at the same time, it uses sprocket one, chain, and sprocket two to achieve stable power transmission, driving the rotating shaft, rotating disk, and linkage, thereby driving the slide plate to slide back and forth along a preset trajectory; when the slide plate slides, its top side toothed plate meshes with the driven gear of the air knife, causing the air knife to swing back and forth, realizing continuous adjustment of the spray angle, so that the cleaning airflow can fully cover one side of the PCB board, effectively avoiding the problem of local cleaning omissions caused by a fixed spray angle.

[0018] 2. In this invention, the reciprocating sliding motion of the sliding plate drives the shaft-shaped plug to switch the connection between air inlet pipe one and air inlet pipe two, achieving alternating spraying of high-pressure dry air and inert cleaning gas. Combined with the full-coverage blowing effect of the reciprocating rotation of the air knife, the high-pressure air first efficiently removes floating dust, and then the inert gas meticulously removes tiny residual impurities, resulting in a synergistic dual cleaning effect. Simultaneously, the "jet-adsorption" closed-loop airflow path avoids secondary contamination by impurities, and the non-contact cleaning method protects the PCB board from damage, significantly improving cleaning quality and stability, and meeting the high-precision cleaning requirements of PCB boards. Attached Figure Description

[0019] Figure 1 This is a perspective view of a single-sided non-contact cleaning device for PCB boards proposed in this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0021] Figure 3 This is a schematic diagram of the air duct structure of a single-sided non-contact cleaning device for PCB boards proposed in this utility model;

[0022] Figure 4 This utility model proposes a schematic diagram of the cleaning shell structure of a single-sided non-contact cleaning device for PCB boards.

[0023] Figure 5 for Figure 4 Enlarged view of point B in the image;

[0024] Figure 6 for Figure 4 Enlarged view of point C in the image;

[0025] Figure 7 This utility model proposes a schematic diagram of the air knife structure of a single-sided non-contact cleaning device for PCB boards;

[0026] Figure 8 for Figure 7 Enlarged view of point D in the image;

[0027] Figure 9 This utility model proposes a flowchart of a single-sided non-contact cleaning device for PCB boards.

[0028] Legend:

[0029] 1. Outer shell; 2. Cleaning shell; 3. Conveyor; 4. Air knife; 5. Connecting air pipe; 6. Rotary disc; 7. Coupling; 8. Air duct; 9. Inlet pipe one; 10. Inlet pipe two; 11. Shaft plug; 12. L-shaped connecting rod; 13. Slide plate; 14. Driven gear; 15. Sprocket one; 16. Chain; 17. Connecting hose; 18. Sprocket two. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 5 The present invention provides an embodiment of a single-sided non-contact cleaning device for PCB boards, comprising a cleaning shell 2 and a connecting air pipe 5;

[0032] The inner wall of the cleaning shell 2 is rotatably connected to an air knife 4. The front outer wall of the cleaning shell 2 is rotatably connected to a rotating shaft. The outer wall of the cleaning shell 2 is slidably connected to a slide plate 13. A rotating disk 6 is fixedly connected to the outer wall of the rotating shaft. A connecting shaft 7 is rotatably connected to the outer wall of the rotating disk 6. The rear end of the connecting shaft 7 is rotatably connected to the outer wall of the slide plate 13. A conveyor 3 is installed on the bottom side of the cleaning shell 2. A sprocket 15 is fixedly connected to the outer wall of the drive shaft of the conveyor 3. A sprocket 2 18 is fixedly connected to the middle end of the rotating shaft. A chain 16 connects the sprocket 15 and the sprocket 2 18. A toothed plate is fixedly connected to the top side of the slide plate 13. A fixed tube is fixedly connected to the outer wall of one end of the air knife 4. A driven gear 14 is fixedly connected to the outer wall of the fixed tube. The toothed plate and the driven gear 14 are meshed. An outer shell 1 is fixedly connected to the outer wall of the cleaning shell 2.

[0033] Specifically, the core load-bearing structure consists of a cleaning shell 2 and an outer shell 1. The outer shell 1 is bolted to the outer wall of the cleaning shell 2, forming a double-layer protective structure. This structure prevents impurities carried by airflow during cleaning from leaking out and also provides dust protection for the internal transmission components. (Refer to...) Figure 7 and Figure 8The cleaning shell 2 is made of stainless steel, with symmetrical bearing mounting holes on both sides of its inner wall. The two ends of the air knife 4 are rotatably connected to these mounting holes via deep groove ball bearings. The nozzle of the air knife 4 has a flat design, with a width adapted to the cleaning area of ​​a common PCB board, ensuring precise airflow coverage. Two sets of symmetrical bearing seats are welded to the front outer wall of the cleaning shell 2. The rotating shaft is rotatably supported within the bearing seats via tapered roller bearings. Both ends of the rotating shaft extend out of the bearing seats and are fixedly connected to the rotating disk 6 via flat keys. The diameter of the rotating disk 6 is determined according to the preset sliding stroke of the slide plate 13, ensuring that the connecting shaft 7 can drive the slide plate 13 to achieve stable reciprocating motion. The inner side of the slide plate 13 has a groove adapted to the outer wall of the cleaning shell 2, with wear-resistant copper sleeves embedded in the groove to reduce frictional resistance during sliding. The two ends of the connecting shaft 7 are rotatably connected to the rotating disk 6 and the slide plate 13 respectively via spherical bearings, avoiding transmission jamming due to installation errors. A conveyor 3 is fixedly mounted on the bottom side of the cleaning shell 2 via a bracket. The conveyor 3 adopts a belt conveyor structure, and the surface of the conveyor belt is covered with an anti-static coating to prevent the PCB board from attracting impurities due to static electricity during transportation. One end of the drive shaft of the conveyor 3 is fixedly connected to sprocket 15 via a tension sleeve, and the middle end of the rotating shaft is also fixedly connected to sprocket 28 via a tension sleeve. The tooth ratio of sprocket 15 to sprocket 2 is set to 3:1 to ensure that they rotate synchronously. The chain 16 adopts a roller chain structure and is equipped with a chain guard on the outside to prevent foreign objects from being drawn in and affecting the transmission stability. A toothed plate is fixed to the top side of the slide plate 13 by welding. The module of the toothed plate matches that of the driven gear 14. The driven gear 14 is fixed to the outer wall of the fixed tube at one end of the air knife 4 by a set screw. The fixed tube and the air knife 4 are integrally formed to ensure no relative shaking during transmission. When the slide plate 13 slides back and forth, the meshing transmission between the toothed plate and the driven gear 14 can be accurately converted into the reciprocating rotation of the air knife 4, realizing continuous adjustment of the spray angle.

[0034] Reference Figure 3 , Figure 4 and Figure 6 The connecting air pipe 5 is located on the outer wall of the cleaning shell 2. An air inlet pipe 9 is fixedly connected to the top rear end of the connecting air pipe 5, and an air inlet pipe 10 is fixedly connected to the bottom rear end of the connecting air pipe 5. A shaft-shaped plug 11 is located inside the connecting air pipe 5. An L-shaped connecting rod 12 is fixedly connected to the rear end of the slide plate 13. The rear end of the L-shaped connecting rod 12 is connected to the shaft-shaped plug 11. The air knife 4 is connected to the connecting air pipe 5 through a connecting hose 17. An air duct 8 is fixedly connected to the top side of the cleaning shell 2. The connecting hose 17 is located inside the fixed pipe. Sealing gaskets are provided at both the front and rear ends of the shaft-shaped plug 11. A sealing ring is fixedly connected to the rear end of the connecting air pipe 5.

[0035] Specifically, the connecting air pipe 5 is made of seamless steel pipe and is fixed to the outer wall of the cleaning shell 2 by pipe clamps. The inner diameter of the connecting air pipe 5 is determined according to the maximum air intake of the air knife 4 to ensure that there is no significant pressure drop during airflow. In order to realize the real-time recovery of the ejected gas and impurities, a negative pressure suction port is connected to the middle side wall of the connecting air pipe 5 through a branch pipe. The negative pressure suction port is connected to an external negative pressure fan through a pipe, and a flow regulating valve is installed on the branch pipe to adjust the suction negative pressure according to the cleaning needs (usually set to -0.02 to -0.05 MPa). Meanwhile, a strip-shaped suction groove is provided on the inner wall of the cleaning shell 2 below the spray area of ​​the air knife 4. The strip-shaped suction groove is connected to the negative pressure suction port of the connecting air pipe 5 through the airflow channel inside the cleaning shell 2, forming a "jet-adsorption" closed-loop airflow path. When the air knife 4 sprays cleaning airflow onto one side of the PCB board, the airflow carries surface impurities away from the PCB board and is then sucked in by the strip-shaped suction groove. It then enters the connecting air pipe 5 through the airflow channel and the negative pressure suction port, and is then transported by the connecting air pipe 5 to an external impurity filtration device (such as a bag filter) to achieve gas purification and impurity collection, preventing impurities from secondary contaminating the PCB board or spreading to the surrounding environment. The upper rear end of the connecting air pipe 5 is fixedly connected to the first air inlet pipe 9, and the lower rear end is also fixedly connected to the second air inlet pipe 10. Both the first air inlet pipe 9 and the second air inlet pipe 10 are equipped with shut-off valves and pressure gauges on their outer walls. The shut-off valves are used to control the airflow, and the pressure gauges allow operators to monitor the airflow pressure in real time to ensure stable pressure during the cleaning process. The shaft-shaped plug 11 is made of rubber, and its outer wall is wrapped with a wear-resistant sealing layer. The thickness of the sealing layer is designed according to the inner diameter of the connecting air pipe 5, which can ensure smooth sliding of the shaft-shaped plug 11 and reliable sealing of the air inlet interface. An L-shaped connecting rod 12 is welded to the rear end of the slide plate 13. The horizontal section of the L-shaped connecting rod 12 passes through a guide hole opened in the side wall of the connecting air pipe 5. A sealing ring is installed in the guide hole to prevent airflow leakage from the guide hole. The L-shaped connecting rod 12 and the shaft-shaped plug 11 are fixedly connected by threads, which facilitates later maintenance and replacement. The air knife 4 and the connecting air pipe 5 are connected by a connecting hose 17. The connecting hose 17 is made of high-pressure resistant polytetrafluoroethylene, which has good flexibility and corrosion resistance and can adapt to the angle changes when the air knife 4 reciprocates. Both ends of the connecting hose 17 are sealed to the air inlet of the air knife 4 and the air outlet of the connecting air pipe 5 by clamps to ensure no airflow leakage. The top side of the cleaning shell 2 is fixedly connected to the air duct 8 by bolts. The air duct 8 is made of plastic and has a partition groove inside. The connecting hose 17 is inserted into the partition groove to avoid multiple sets of connecting hoses 17 from getting tangled or rubbing against other parts and being damaged. Dustproof nets are also installed at both ends of the air duct 8 to prevent external dust from entering the air duct 8 and contaminating the connecting hose 17.

[0036] Reference Figure 9 A method for non-contact cleaning of one side of a PCB board, comprising:

[0037] Step 1: Place the PCB board to be cleaned on the conveyor surface of the conveyor 3, and start the conveyor 3 to transport the PCB board into the cleaning shell 2;

[0038] Step 2: The drive shaft of the conveyor 3 rotates by driving the rotating shaft, which in turn drives the slide plate 13 to slide back and forth along the outer wall of the cleaning shell 2.

[0039] Step two, the sliding of skateboard 13, includes:

[0040] S1. When the drive shaft of the conveyor 3 rotates, it drives the coaxially fixed sprocket 15 to rotate.

[0041] S2. Sprocket 15 drives sprocket 2 18 on the rotating shaft to rotate via chain 16;

[0042] Step two involves the air knife 4 reciprocating within the cleaning housing 2, including:

[0043] S1. The slide plate 13 is driven by the driven gear 14 on the outer wall of the fixed tube of the air knife 4 through the meshing of the top side tooth plate. When the slide plate 13 slides back and forth, it drives the driven gear 14 to rotate in the forward and reverse directions, thereby driving the air knife 4 to swing back and forth around the rotation connection point of the inner wall of the cleaning shell 2.

[0044] S2. The spray angle of the air knife 4 is continuously adjusted according to the sliding trajectory of the slide plate 13 to achieve full coverage airflow purging of one side of the PCB board.

[0045] Step two involves adjusting the opening of the airflow channel inside the connecting air pipe 5 using the shaft-shaped plug 11, including:

[0046] S1. When the slide plate 13 slides back and forth, it drives the L-shaped connecting rod 12 at the rear end to move synchronously. The L-shaped connecting rod 12 drives the shaft plug 11 to move back and forth inside the connecting air pipe 5.

[0047] S2. By changing the connection between the connecting air pipe 5 and the first air inlet pipe 9 and the second air inlet pipe 10 through the shaft-shaped plug 11, the cleaning gas can be switched to perform alternating cleaning of the PCB board.

[0048] Step 3: When the slide plate 13 slides, it drives the air knife 4 to rotate back and forth on the inner wall of the cleaning shell 2. At the same time, the switching of the gas inside the connecting air pipe 5 is adjusted through the shaft plug 11.

[0049] Step 4: Introduce clean airflow into the connecting air pipe 5 through the first air inlet pipe 9 or the second air inlet pipe 10. The airflow is then delivered to the air knife 4 via the connecting hose 17. During the reciprocating rotation of the air knife 4, airflow is sprayed onto one side of the PCB board to achieve non-contact cleaning.

[0050] Specifically, first, prepare the PCB board to be cleaned, ensuring its surface is free of large areas of adhering impurities. Place the PCB board stably on the conveyor surface of conveyor 3, with the side to be cleaned facing upwards and the edge of the PCB board parallel to the conveying direction of conveyor 3. Start the drive motor of conveyor 3, setting the conveying speed to 0.5 m / s. Conveyor 3 drives the PCB board to be conveyed into the cleaning shell 2 at a uniform speed. When the drive motor of conveyor 3 is running, its output shaft drives the coaxially fixed sprocket 15 to rotate synchronously. Sprocket 15 drives sprocket 18 and the rotating shaft to rotate synchronously via chain 16. When the rotating shaft rotates, it drives the rotating disks 6 at both ends to perform circular motion. The rotating disks 6 pull the slide plate 13 along the slide rail on the outer wall of the cleaning shell 2 through the connecting shaft 7, and the sliding stroke is set to 15-20 cm according to the width of the PCB board. The sliding frequency matches the conveying speed of conveyor 3. During the reciprocating sliding of the slide plate 13, the toothed plate on its top side continuously meshes with the driven gear 14 on the fixed tube of the air knife 4. When the slide plate 13 slides forward, the toothed plate drives the driven gear 14 to rotate clockwise, thereby driving the air knife 4 to swing downward around the rotation connection point on the inner wall of the cleaning shell 2. When the slide plate 13 slides backward, the toothed plate drives the driven gear 14 to rotate counterclockwise, and the air knife 4 swings upward, realizing the reciprocating swing of the air knife 4 within the range of 60°-120°, ensuring that the jet airflow can cover the entire area of ​​one side of the PCB board. Simultaneously, the slide plate 13 drives the shaft-shaped plug 11 to reciprocate synchronously inside the connecting air pipe 5 via the L-shaped connecting rod 12. When the slide plate 13 slides forward, the shaft-shaped plug 11 blocks the interface of the second air inlet pipe 10, and the first air inlet pipe 9 connects to the connecting air pipe 5, introducing high-pressure dry air at a pressure of 0.6MPa into the first air inlet pipe 9. The airflow is then delivered to the air knife 4 via the connecting air pipe 5 and the connecting hose 17. During its swing, the air knife 4 sprays airflow onto one side of the PCB board, blowing away surface dust. When the slide plate 13 slides backward, the shaft-shaped plug 11 blocks the interface of the first air inlet pipe 9, and the second air inlet pipe 10 connects to the connecting air pipe 5, introducing inert cleaning gas into the second air inlet pipe 10 to perform a secondary fine cleaning on one side of the PCB board, removing residual micro-impurities. The cleaned PCB board is then conveyed out of the cleaning shell 2 by the conveyor 3, completing the entire non-contact cleaning process.

[0051] Working principle: The PCB board to be cleaned is placed on the conveyor surface of the conveyor 3. The conveyor 3 is started, and its drive shaft drives the coaxial sprocket 15 to rotate. The sprocket 15 drives the sprocket 2 18 on the rotating shaft to rotate synchronously through the chain 16, so that the rotating shaft rotates in the bearing seat on the outer wall of the front end of the cleaning shell 2. When the rotating shaft rotates, it drives the rotating disks 6 at both ends to make circular motion. The rotating disks 6 pull the slide plate 13 along the slide groove on the outer wall of the cleaning shell 2 through the connecting shaft 7 on the edge. The toothed plate on the top side of the slide plate 13 meshes with the driven gear 14 on the outer wall of the fixed tube of the air knife 4, thereby driving the air knife 4 to swing back and forth around the bearing mounting hole on the inner wall of the cleaning shell 2, so as to realize the continuous adjustment of the spray angle of the air knife 4. At the same time, the L-shaped connecting rod 12 at the rear end of the slide plate 13 drives the shaft plug 11 to move back and forth synchronously inside the connecting air pipe 5. When the shaft plug 11 seals... When the second air inlet pipe 10 is blocked, the first air inlet pipe 9 introduces clean airflow into the connecting air pipe 5. The airflow is then delivered to the air knife 4 via the connecting hose 17. The air knife 4 sprays airflow onto one side of the PCB board to sweep away impurities. When the shaft plug 11 blocks the first air inlet pipe 9, the second air inlet pipe 10 switches to supply clean airflow, continuously cleaning one side of the PCB board. During this process, the negative pressure suction port of the middle branch pipe of the connecting air pipe 5 is connected to an external negative pressure fan to generate negative pressure. The strip-shaped suction groove on the inner wall of the cleaning shell 2, corresponding to the area below the air knife 4's spray zone, draws the waste gas carrying impurities into the connecting air pipe 5 through the airflow channel inside the cleaning shell 2. The air is then delivered to the external filter device for purification. At the same time, the outer shell 1 protects the cleaning shell 2 and its internal components, and the air duct 8 protects the connecting hose 17, ultimately completing the non-contact cleaning operation of one side of the PCB board.

[0052] It is worth noting that the circuits and protection systems in the PCB board cleaning equipment involved in the above embodiments are based on the corresponding existing technologies according to the actual situation, and therefore will not be described in detail in the embodiments of this application.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A single-sided non-contact cleaning device for PCB boards, characterized in that, Includes a cleaning shell (2) and a connecting air tube (5); The inner wall of the cleaning shell (2) is rotatably connected to an air knife (4), the front outer wall of the cleaning shell (2) is rotatably connected to a rotating shaft, the outer wall of the cleaning shell (2) is slidably connected to a sliding plate (13), the outer wall of the rotating shaft is connected to the sliding plate (13) through a linkage component one, a conveyor (3) is installed on the bottom side of the cleaning shell (2), the drive shaft of the conveyor (3) is connected to the rotating shaft through a linkage component two, the top side of the sliding plate (13) is connected to one end of the air knife (4) through a gear set, and the outer wall of the cleaning shell (2) is fixedly connected to an outer shell (1). The connecting air pipe (5) is disposed on the outer wall of the cleaning shell (2), and the rear end of the slide plate (13) is connected to the inner wall of the connecting air pipe (5) through a blocking component.

2. The PCB board single-sided non-contact cleaning device according to claim 1, characterized in that: The linkage component includes a rotating disk (6) fixedly connected to the outer wall of the rotating shaft. The outer wall of the rotating disk (6) is rotatably connected to a connecting shaft (7), and the rear end of the connecting shaft (7) is rotatably connected to the outer wall of the sliding plate (13).

3. The PCB board single-sided non-contact cleaning device according to claim 1, characterized in that: The second linkage component includes a sprocket (15) fixedly connected to the outer wall of the drive shaft of the conveyor (3), and a sprocket (18) fixedly connected to the middle end of the rotating shaft. The sprocket (15) and the sprocket (18) are connected by a chain (16).

4. The PCB board single-sided non-contact cleaning device according to claim 1, characterized in that: The gear set includes a toothed plate fixedly connected to the top side of the slide plate (13), a fixed tube fixedly connected to the outer wall of one end of the air knife (4), a driven gear (14) fixedly connected to the outer wall of the fixed tube, and the toothed plate and the driven gear (14) are meshed.

5. The PCB board single-sided non-contact cleaning device according to claim 1, characterized in that: The blocking assembly includes a shaft-shaped plug (11) disposed inside the connecting air pipe (5), and an L-shaped connecting rod (12) is fixedly connected to the rear end of the slide plate (13), the rear end of the L-shaped connecting rod (12) being connected to the shaft-shaped plug (11).

6. The PCB board single-sided non-contact cleaning device according to claim 4, characterized in that: The air knife (4) is connected to the connecting hose (17) and the connecting air pipe (5) through the connecting hose (17). The top side of the cleaning shell (2) is fixedly connected to the air duct (8), and the connecting hose (17) is set inside the fixed pipe.

7. The PCB board single-sided non-contact cleaning device according to claim 1, characterized in that: An air inlet pipe (9) is fixedly connected to the top rear end of the connecting air pipe (5), and an air inlet pipe (10) is fixedly connected to the bottom rear end of the connecting air pipe (5).

8. A single-sided non-contact cleaning device for PCB boards according to claim 5, characterized in that: Both ends of the shaft plug (11) are provided with sealing gaskets, and the rear end of the connecting air pipe (5) is fixedly connected with a sealing ring.

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