Circuit board dedusting and cleaning mechanism for SMT patch production

Abstract

The utility model discloses a circuit board dedusting and cleaning mechanism for SMT patch production, which comprises a cleaning table, two frame plates are symmetrically mounted at the top of the cleaning table, two cleaning frames are mounted at the tops of the frame plates, and a row of brush cylinders are mounted on the inner sides of the cleaning frames. Through the design of the overturning assembly, after one side of a circuit board is cleaned and moved to the tail ends of the conveying belts, one section of a suspended part at one end of the circuit board is inserted into a notch in one side of a U-shaped plate, then a motor is started, a notch of an overturning shaft drives the U-shaped plate to rotate by 180 degrees, and at the moment, the circuit board is overturned and lapped on the surfaces of the two conveying belts at the other end; the L-shaped baffle can be used for limiting, the circuit board is prevented from falling off in the overturning process, after the circuit board is driven to move out of the notch of the U-shaped board within several seconds, the U-shaped board automatically rotates reversely and resets, and the overturned circuit board is conveyed to the inner side of the cleaning frame at the second position on the conveying belt at the other end to be cleaned and then taken out, so that double-sided automatic cleaning is achieved, manual overturning is not needed, and the working efficiency is improved. And the working efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit board cleaning technical field, concretely is a circuit board dust cleaning mechanism for SMT patch production. BACKGROUND

[0002] SMT patch, full name surface mounted technology (Surface Mounted Technology) patch, is a very popular technology and process in electronic assembly industry, which mainly relates to mounting pinless or short lead surface mounted components (abbreviated as SMC / SMD, Chinese called sheet component) on the surface of printed circuit board (PCB) or other substrate surface, and through reflow soldering or immersion soldering method to be welded and assembled circuit connection technology, and in SMT patch production, it is necessary to remove dust, fibers, hair, skin debris and metal small particles and other foreign matters that may be contaminated in the production process of circuit board (such as PCB board) to ensure the cleanliness of the surface of the circuit board and improve the stability of the subsequent production link and product quality.

[0003] The existing cleaning structure mostly places the circuit board on the conveying belt, and cleans by rotating the brush cylinder, for example, the patent number CN210614455U announces a kind of surface fast cleaning equipment for circuit board production and processing, this cleaning mode is higher in efficiency, can be automated transportation and automatic cleaning.

[0004] However, actual investigation finds that the above scheme still has certain deficiencies, first, after the circuit board passes through the brush cylinder, the bottom surface cannot contact the brush, so that only the top surface of the circuit board can be cleaned, after cleaning, the staff needs to transport the cleaned circuit board again, and clean it again, which leads to low work efficiency, cannot meet the use requirement, and the above-mentioned filter screen is used to collect floating dust, so that the filter screen needs to be removed and cleaned frequently, and small dust can easily extrude through the filter screen and damage the fan.

[0005] Therefore, in view of the above problems, the applicant proposes a kind of circuit board dust cleaning mechanism for SMT patch production to solve the above problems. INVENTION CONTENTS

[0006] The utility model aims at providing a kind of circuit board dust cleaning mechanism for SMT patch production to solve the problem of inconvenient turning and low efficiency and poor dust collection effect in the above background technology.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: A circuit board dust removal and cleaning mechanism for SMT patch production, including the cleaning table, two frame plates are symmetrically installed on the top of the cleaning table, two cleaning frames are installed on the top of the frame plate, a row of brush barrels is installed on the inner side of the cleaning frame, four rotating rollers are rotatably installed between the frame plates, the cam of two adjacent rotating rollers on the same side is connected with a conveying belt, and the two conveying belts jointly convey the circuit board, a turnover assembly is installed between the middle two rotating rollers between the frame plates, and a dust removal assembly is installed on the top of the cleaning table;

[0008] The turnover assembly comprises a motor fixed to the side wall of the frame plate, a motor shaft is connected with a turnover shaft rotatably installed between the two frame plates, a U-shaped plate is fixedly connected to the turnover shaft, L-shaped baffle plates are installed on the two sides of the U-shaped plate, the U-shaped plate is located between the two conveying belts on one side when being horizontal, and the L-shaped baffle plates are attached to the surface of the conveying belts on the same side.

[0009] Preferably, protective strip plates are fixed to the inner walls of the two frame plates above the conveying belts, the bottom surfaces of the protective strip plates are close to the top surfaces of the conveying belts, the circuit board is close to the side surfaces of the protective strip plates when being conveyed on the two conveying belts, the spacing between the two protective strip plates is the same as the spacing between the inner sides of the two L-shaped baffle plates, and one end of the L-shaped baffle plate is close to one end of the protective strip plate when being horizontal.

[0010] Preferably, one end of the U-shaped plate is provided with a clamping groove, the clamping groove is clamped with a square fixed to the outer wall of the turnover shaft and is fixed by using a screw.

[0011] Preferably, the dust removal assembly comprises two water tanks fixed to the top of the cleaning table, the water tanks are located on one side of the two cleaning frames and contain clean water in the interiors, a negative pressure fan is installed at the air outlet of the outer wall of one side of the water tank, a dust suction pipe at the top of the water tank penetrates through the cleaning frame and is connected with a dust suction cover, and the bottom of the dust suction pipe is close to the water surface.

[0012] Preferably, a dustproof cover is fixed to the top of the water tank, a bevel gear A and a bevel gear B are rotatably installed on the inner side and the bottom of the dustproof cover respectively and are meshed with each other, the rotating shaft of the bevel gear A penetrates through the rotating shaft of one brush barrel, and the rotating shaft of the bevel gear B penetrates through the water tank and is connected with a stirrer, and the stirrer is located on one side of the dust suction pipe.

[0013] Preferably, a dustproof shell is installed at the air outlet of the inner side of the water tank, one side of the dustproof shell is designed as an open inclined surface, and a filter screen is installed on the outer wall of the inclined opening.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a turnover assembly is designed, and after one side cleaning of circuit board is completed and is moved to the end of conveyer belt, the section of one end overhanging part will be inserted in the recess of one side of U -shaped board, then starts motor, and the recess of turnover shaft drives U -shaped board to rotate one hundred and eighty degrees, at this moment, the circuit board will also turn over and be supported on the surface of two conveyer belts of another end, and L -shaped baffle can be limited, avoids the circuit board from falling in the turnover process, and after a few seconds, the circuit board is driven and removes the recess of U -shaped board, and U -shaped board automatically reverses rotation and resets, and the circuit board after turning over is transported to the inside cleaning of second place cleaning frame on another end conveyer belt and is taken out again, like this, realize double -sided automatic cleaning, do not need manual turn over, effectively improve work efficiency.

[0016] The utility model discloses a dust removal subassembly design, when working, negative pressure fan continues to start, and the water tank inside produces negative pressure, and the inside cleaning of cleaning frame because of cleaning floating dust is inhaled through dust absorption cover and dust absorption pipe, because dust absorption pipe bottom pipe mouth is close to water surface, and the position of negative pressure fan is located the pipe mouth top, and most dust will first contact water surface after blowing out instead of ascending along with airflow, thereby dissolving in water, then need not be collected through filter screen, and collection is more efficient, and wind machine is not easy to damage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is whole three -dimensional structure schematic of the utility model Figure 1 ;

[0018] Figure 2 It is whole three -dimensional structure schematic of the utility model Figure 2 And one cleaning frame and water tank are sectional view;

[0019] Figure 3 It is whole three -dimensional structure schematic of the utility model Figure 3 And one cleaning frame is sectional view;

[0020] Figure 4 It is the whole three -dimensional structure schematic of the utility model Figure 2 In A place enlarged structure schematic diagram;

[0021] Figure 5 It is the whole three -dimensional structure schematic of the utility model Figure 3 In B place enlarged structure schematic diagram;

[0022] Figure 6 It is turnover assembly three -dimensional structure schematic of the utility model;

[0023] Figure 7 It is dust removal subassembly front view sectional structure schematic of the utility model;

[0024] Figure 8 It is turnover assembly three -dimensional structure schematic of the utility model's dust removal subassembly.

[0025] In the diagram: 1. Cleaning table; 11. Shelf; 12. Cleaning rack; 13. Brush tube; 14. Rotary roller; 15. Conveyor belt; 16. Protective strip; 2. Tilting assembly; 21. Motor; 22. Tilting shaft; 23. U-shaped plate; 24. L-shaped baffle; 25. Slot; 26. Cube; 3. Dust removal assembly; 30. Negative pressure fan; 31. Water tank; 32. Dust suction hood; 33. Dust cover; 34. Conical tooth A; 35. Conical tooth B; 36. Agitator; 37. Dustproof shell; 4. Circuit board. Detailed Implementation

[0026] 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.

[0027] like Figures 1-8 As shown, a dust removal and cleaning mechanism for circuit boards used in SMT assembly production includes a cleaning table 1. Two racks 11 are symmetrically installed on the top of the cleaning table 1. Two cleaning racks 12 are installed on the top of the racks 11. A row of brush cylinders 13 is installed on the inner side of the cleaning racks 12. Four rotating rollers 14 are rotatably installed between the racks 11. A conveyor belt 15 is connected to the cams of two adjacent rotating rollers 14 on the same side. The two conveyor belts 15 together transport the circuit board 4. A flipping assembly 2 is installed between the racks 11 at the position between the two middle rotating rollers 14. A dust removal assembly 3 is installed on the top of the cleaning table 1. The flipping assembly 2 includes a motor 21 fixed to the side wall of the rack 11. The motor shaft of the motor 21 is connected to a flipping shaft 22 rotatably installed between the two racks 11. A U-shaped plate 23 is fixedly connected to the flipping shaft 22. L-shaped baffles 24 are installed on both sides of the U-shaped plate 23. When the U-shaped plate 23 is horizontal, it is located between the two conveyor belts 15 on one side, and the L-shaped baffles 24 are in contact with the surface of the conveyor belt 15 on the same side.

[0028] By designing the turnover assembly 2, in operation, the conveying belt 15 and the brush cylinder 13 are started together, a circuit board 4 is placed between the two conveying belts 15 at the a end, at this time the middle part of the circuit board 4 is suspended, then the conveying belt 15 operates slowly and uniformly, the circuit board 4 is transported to the inside of the first cleaning frame 12 and is located below the brush cylinder 13 and is in contact with the brush, and after a period of time through the cleaning frame 12, a row of brush cylinders 13 completes the single-sided cleaning, and at the same time during the cleaning process, another circuit board 4 can be placed between the conveying belts 15 at the a end, which can be uniformly placed by the existing mechanical hand, so that continuous feeding can be realized, and after the initial cleaning is completed, the circuit board 4 is immediately transported out of the cleaning frame 12 and moves to the end of the conveying belt 15, because at this time the U-shaped plate 23 faces the conveying belt on the a side and is in a horizontal position, and the two L-shaped baffles 24 on the sides are attached to the surface of the conveying belt 15 on the same side, so that after the circuit board 4 moves to the end, the suspended part of one end of the circuit board 4 is inserted into the notch on one side of the U-shaped plate 23, and the circuit board 4 is located between the two L-shaped baffles 24 on the sides and is close, at this time the circuit board 4 is not in contact with the upper and lower ends inside the U-shaped plate 23, but is very close, then the motor 21 is started, the notch of the turnover shaft 22 drives the U-shaped plate 23 to rotate one hundred and eighty degrees, the L-shaped baffle 24 also rotates and is attached to the surface of the two conveying belts 15 on the other side, at this time the circuit board 4 is also turned over and is placed on the surface of the two conveying belts 15 on the other end, and the L-shaped baffle 24 can be limited to prevent the circuit board 4 from falling during the turnover process, and at the same time during the turnover, the circuit board 4 will be slightly inclined in the notch of the U-shaped plate 23, which will not affect it, and after a few seconds, the circuit board 4 is automatically reversed and rotated to reset after being driven out of the notch of the U-shaped plate 23 by the conveying belt 15, and after the turned-over circuit board 4 is transported to the inside of the second cleaning frame 12 on the conveying belt 15 on the other end and is cleaned, it is taken out, so that double-sided automatic cleaning is realized without manual turnover, which effectively improves the work efficiency, it is noted that the motor 21 is also automatically started periodically, so the turnover shaft 22 also rotates back and forth periodically, and through the mechanical hand for distance and timing feeding, combined with the slow operation of the conveying belt 15, continuous automatic double-sided cleaning is realized, which is very efficient, it is noted that the conveying belt 15 and the brush cylinder 13 are driven by electricity, and the motor 21 is automatically started periodically and the mechanical hand is fed, which are existing design means, and will not be described here, and the conveying belt 15 has a certain friction, and the brush is soft, so that the circuit board will not be damaged during cleaning.

[0029] The inner walls of the two frame plates 11 are fixed with protective strip plates 16 above the conveying belt 15, the bottom surface of the protective strip plate 16 is attached to the top surface of the conveying belt 15, and the circuit board 4 is attached to the side surface of the protective strip plate 16 when being transported on the two conveying belts 15, and the distance between the two protective strip plates 16 is the same as the distance between the two L-shaped baffles 24 inside, and one end of the L-shaped baffle 24 is attached to one end of the protective strip plate 16 when it is horizontal.

[0030] Furthermore, the protective strip 16 is close to the L-shaped baffle 24, forming a long protective strip. When placed, the road slab 4 is on the two conveyor belts 15 and located between the protective strip 16, thus maintaining straight transport and smoothly transporting it to the U-shaped plate 23 notch and between the two L-shaped baffles 24 for easy flipping. After flipping, it will also be transported between the two protective strips 16 on the other side, which is very stable.

[0031] One end of the U-shaped plate 23 is provided with a slot 25, which is engaged with the block 26 fixed to the outer wall of the flip shaft 22 and fixed with screws.

[0032] Furthermore, the slot 25 and the square 26 facilitate the replacement and maintenance of the U-shaped plate 23, which is very practical.

[0033] like Figures 1-6 As shown, the dust removal assembly 3 includes two water tanks 31 fixed on the top of the cleaning table 1. The water tanks 31 are located on one side of the two cleaning racks 12 and are filled with clean water. A negative pressure fan 30 is installed on the outer wall of one side of the water tank 31 at the air outlet. The top of the suction pipe on the top of the water tank 31 passes through the cleaning rack 12 and connects to the suction hood 32, and the bottom of the suction pipe is close to the water surface.

[0034] With the dust removal component 3, the negative pressure fan 30 is continuously running during operation, generating negative pressure inside the water tank 31. The dust is sucked into the cleaning rack 12 by the dust suction hood 32 and the suction pipe. Since the bottom of the suction pipe is close to the water surface, and the negative pressure fan 30 is located above the pipe opening, most of the dust will first come into contact with the water surface after being blown out, rather than rising with the airflow, and thus dissolve in the water. Therefore, it does not need to be collected by the filter screen, making collection more efficient and less likely to damage the fan.

[0035] A dust cover 33 is fixed to the top of the water tank 31. Inside the dust cover 33, on one side and at the bottom, bevel teeth A34 and B35 are respectively rotatably installed. The rotating shaft of bevel tooth A34 passes through the cleaning frame 12 and connects to the rotating shaft of a brush cylinder 13. The rotating shaft of bevel tooth B35 passes through the water tank 31 and connects to an agitator 36. The agitator 36 is located on one side of the suction pipe.

[0036] Furthermore, during operation, the rotating shaft at the other end of the output end of the brush cylinder 13 will drive the bevel teeth A34 and B35 to rotate synchronously. Through meshing connection, the stirrer 36 will rotate, causing the water at the bottom of the suction pipe to be stirred and creating eddies on the water surface. This will cause the dust falling into the water to quickly settle to the bottom and not accumulate, further improving the collection efficiency.

[0037] A dust cover 37 is installed inside the water tank 31 at the air outlet. One side of the dust cover 37 has an inclined opening design, and a filter screen is installed on the outer wall of the inclined opening.

[0038] Further, a small amount of dust will float to the air outlet, at this time through the filter screen of dustproof shell 37 one side can be intercepted, and the negative pressure fan 30 can be closed once again start for a period of time, the process dust can slide down to the water through the slope, very practical.

[0039] Embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A circuit board dust cleaning mechanism for SMT patch production, comprising a cleaning table (1), two frame plates (11) are symmetrically installed on the top of the cleaning table (1), two cleaning frames (12) are installed on the top of the frame plate (11), a row of brush barrels (13) are installed on the inner side of the cleaning frame (12), characterized in that, Four rotating rollers (14) are rotatably arranged between the frame plates (11), and the cams of two adjacent rotating rollers (14) on the same side are connected with a conveying belt (15). The two conveying belts (15) jointly convey the circuit board (4). A turnover assembly (2) is arranged between the two rotating rollers (14) in the middle of the frame plates (11). A dust removal assembly (3) is arranged on the top of the cleaning table (1). The turnover assembly (2) comprises a motor (21) fixed to the side wall of the frame plate (11), a motor shaft of the motor (21) is connected with a turnover shaft (22) rotatably arranged between the two frame plates (11), a U-shaped plate (23) is fixedly connected to the turnover shaft (22), L-shaped baffles (24) are arranged on the two sides of the U-shaped plate (23), and the U-shaped plate (23) is located between the two conveying belts (15) on one side when the U-shaped plate (23) is horizontal, and the L-shaped baffles (24) are attached to the surface of the conveying belts (15) on the same side.

2. The circuit board dust cleaning mechanism for SMT patch production according to claim 1, characterized in that, The inner walls of the two frame plates (11) are fixed with protective strip plates (16) above the conveying belts (15), the bottom surfaces of the protective strip plates (16) are attached to the top surfaces of the conveying belts (15), and the circuit board (4) is attached to the side surfaces of the protective strip plates (16) when the circuit board (4) is conveyed on the two conveying belts (15).

3. The circuit board dust cleaning mechanism for SMT patch production according to claim 2, characterized in that, The distance between the two protective strip plates (16) is the same as the distance between the inner sides of the two L-shaped baffles (24), and one end of the L-shaped baffle (24) is attached to one end of the protective strip plate (16) when the L-shaped baffle (24) is horizontal.

4. The circuit board dust cleaning mechanism for SMT patch production according to claim 1, characterized in that, One end of the U-shaped plate (23) is provided with a clamping groove (25), the clamping groove (25) is clamped with a square block (26) fixed to the outer wall of the turnover shaft (22), and a screw is used for fixation.

5. The circuit board dust cleaning mechanism for SMT patch production according to claim 1, characterized in that, The dust removal assembly (3) comprises two water tanks (31) fixed to the top of the cleaning table (1), the water tanks (31) are located on one side of the two cleaning frames (12) and contain clean water, a negative pressure fan (30) is arranged on the outer wall of one side of the water tank (31) at an air outlet, a dust suction pipe at the top of the water tank (31) penetrates through the cleaning frame (12) and is connected with a dust suction cover (32), and the bottom of the dust suction pipe is attached to the water surface.

6. The circuit board dust cleaning mechanism for SMT patch production according to claim 5, characterized in that, A dustproof cover (33) is fixed to the top of the water tank (31), a bevel gear A (34) and a bevel gear B (35) are rotatably arranged on one side and the bottom of the dustproof cover (33) respectively, the rotating shaft of the bevel gear A (34) penetrates through the cleaning frame (12) and is connected with the rotating shaft of a brush cylinder (13), the rotating shaft of the bevel gear B (35) penetrates through the water tank (31) and is connected with a stirrer (36), and the stirrer (36) is located on one side of the dust suction pipe.

7. The circuit board dust cleaning mechanism for SMT patch production according to claim 5, characterized in that, A dustproof shell (37) is arranged on the inner side of the water tank (31) at the air outlet, one side of the dustproof shell (37) is designed as an open inclined surface, and a filter screen is arranged on the inclined outer wall of the open end.

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