Circuit board surface dust removal device

Abstract

The utility model belongs to the technical field of dust removal, and relates to a circuit board surface dust removal device. The substrate conveying unit is connected to the rack; the roller cleaning unit is connected to the rack; the roller cleaning unit is located above the base plate conveying unit. The brush cleaning unit is connected to the rack; the brush cleaning unit is located at an inlet of the base plate conveying unit. After the structure is adopted, the device has the beneficial effects that the brush cleaning unit is additionally arranged at an inlet when the device is used for cleaning a product, the roller cleaning unit is additionally arranged in the device, and the feeding height can be adjusted by the roller cleaning unit, so that residual tiny dust on the dedusted product is effectively reduced; the cleaning effect of the product is remarkably improved, operation is very convenient, the device can adapt to more different products, the production efficiency of the device is improved, and the market requirement is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal equipment, and specifically relates to a dust removal device for the surface of a circuit board. Background Art

[0002] The substrate is the basic material for manufacturing a PCB. The performance, quality, processability during manufacturing, manufacturing cost, manufacturing level, etc. of the printed circuit board largely depend on the substrate material. And the PCB substrate is prone to adsorbing dust due to static electricity during the production process. Therefore, it is necessary to remove dust from the substrate through a PCB substrate dust removal device and ensure that the further processing of the PCB substrate in a high-grade clean room is not affected by dust.

[0003] Currently, the commonly used PCB substrate dust removal equipment uses a commercially available dust collector to remove dust during the feeding process of the substrate. However, the cleaning power of the dust collector is insufficient and secondary cleaning is still required, which affects the cleaning efficiency. Therefore, it is necessary to make improvements. Summary of the Utility Model

[0004] In order to solve the above problems of the prior art, the utility model provides a dust removal device for the surface of a circuit board, which has high cleaning efficiency.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] As one aspect of the utility model, a dust removal device for the surface of a circuit board is provided, which includes: a frame;

[0007] A substrate conveying unit, connected to the frame;

[0008] A roller cleaning unit, connected to the frame; the roller cleaning unit is located above the substrate conveying unit;

[0009] A brush cleaning unit, connected to the frame; the brush cleaning unit is located at the entrance of the substrate conveying unit.

[0010] Optionally, the substrate conveying unit includes a hexagonal shaft rotatably connected to the frame. A first conveying side plate and a second conveying side plate are respectively connected to the hexagonal shaft at intervals through transmission wheels; a conveying channel for the circuit board is formed between the first conveying side plate and the second conveying side plate; the shaft hole of the transmission wheel is connected to the hexagonal shaft, and the hexagonal shaft can drive the transmission wheel to rotate. At the same time, the transmission wheel can move axially on the hexagonal shaft; a plurality of belt transmission wheels are respectively arranged on the inner sides of the first conveying side plate and the second conveying side plate, and the plurality of belt transmission wheels are connected to the corresponding transmission wheels through transmission belts; one end of the hexagonal shaft is connected to a first driving part arranged on the frame.

[0011] Optionally, it further includes a threaded rod rotatably connected to the frame. A first screw block is provided on the first conveying side plate, and a second screw block is provided on the second conveying side plate. The first screw block and the second screw block are respectively threadedly connected to the threaded rod. Under the action of the threaded rod, the first conveying side plate and the second conveying side plate move towards or away from each other.

[0012] Optionally, one end of the threaded rod is connected with an adjustment knob and / or a numerical display.

[0013] Optionally, a first slider is provided on the first conveying side plate, and a second slider is provided on the second conveying side plate. The first slider and the second slider are respectively slidably connected to a guide shaft provided on the frame.

[0014] Optionally, the roller cleaning unit includes a dust removal rubber roller rotatably connected to the frame. One end of the dust removal rubber roller is connected to the output end of the first driving part through an intermediate transmission part, and the intermediate transmission part is a gear transmission assembly;

[0015] It further includes a height adjustment mechanism. The dust removal rubber roller is connected to the frame through the height adjustment mechanism; a sticky dust paper fixing shaft is connected to the lifting end of the height adjustment mechanism. A sticky dust paper fixing block is rotatably connected to the sticky dust paper fixing shaft, and a drum-shaped sticky dust paper is connected to the sticky dust paper fixing block. The drum-shaped sticky dust paper cooperates with the dust removal rubber roller.

[0016] Optionally, the brush cleaning unit includes a first cleaning unit provided above the conveying channel and a second dust suction unit provided below the conveying channel;

[0017] The first cleaning unit includes a fixing part provided on the frame, and a lifting power part is connected to the fixing part; there are two lifting power parts, and the two lifting power parts are respectively located on the left and right sides of the fixing part; the movable end of the lifting power part is connected to a brush fixing part, and a brush is rotatably connected to the brush fixing part; both ends of the brush are rotatably connected to the brush fixing part through bearings. The brush has a preset interval from the conveying surface of the conveying channel, and this preset interval is adapted to the thickness of the dust removal product; one end of the brush is connected to a second driven gear,

[0018] It further includes a second driving part, and the second driving part is provided on the side of the conveying channel; the output end of the second driving part is connected to a second driving gear through a gear connecting shaft, and the second driving gear meshes with the second driven gear.

[0019] Optionally, it further includes a connecting component. One end of the brush is connected to the second driven gear through the connecting component. The connecting component includes a connecting shaft rod, and a rotating part is connected to the connecting shaft rod. The rotating part is connected to the brush fixing part. The connecting shaft rod can rotate relative to the brush fixing part through the rotating part. At this time, one end of the brush and the connecting shaft rod share the same rotating part. One end of the brush is detachably connected to one end of the connecting shaft rod. The second driven gear is connected to the other end of the connecting shaft rod.

[0020] Optionally, the first cleaning unit further includes a first dust suction housing connected to the brush fixing part. The first dust suction housing has a first dust suction inlet and a first dust suction outlet, and the first dust suction inlet and the first dust suction outlet are connected. The first dust suction inlet is located above the brush. The first dust suction outlet is connected to the dust suction port of the dust collector. The first dust suction outlet and the dust suction port of the dust collector are connected by a first dust suction pipe. The first dust suction pipe and the first dust suction outlet are connected by a telescopic hose.

[0021] The second dust suction unit includes a second dust suction housing provided below the conveying channel. The second dust suction housing has a second dust suction inlet and a second dust suction outlet. The second dust suction inlet and the second dust suction outlet are connected. The second dust suction outlet is connected to the dust suction port of the dust collector.

[0022] Optionally, the bottom of the frame is provided with moving wheels and / or feet.

[0023] For the dust removal device on the surface of the circuit board of the present utility model, its beneficial effects are specifically reflected in: adding a brush cleaning unit at the entrance when the device cleans the product, and adding a roller cleaning unit inside the device. The roller cleaning unit can adjust the feeding height. With this design, the fine dust remaining on the product after dust removal is effectively reduced, enabling the cleaned product to meet the established cleanliness requirements, significantly improving the cleaning effect of the product, and the operation is also very convenient. The device can adapt to more different products, improving the production efficiency of the device and meeting the market demand. Description of the Drawings

[0024] The schematic diagrams in the specification that form a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0025] Figure 1 It is a three-dimensional structure diagram of the dust removal device on the surface of the circuit board of the present utility model;

[0026] Figure 2 It is a front view of the substrate conveying unit and the roller cleaning unit of the present utility model;

[0027] Figure 3The main structural view of the substrate conveying unit and the roller cleaning unit of the present utility model;

[0028] Figure 4 The side structural view of the substrate conveying unit and the roller cleaning unit of the present utility model;

[0029] Figure 5 The bottom structural view of the substrate conveying unit and the roller cleaning unit of the present utility model;

[0030] Figure 6 The three-dimensional structural view of the brush cleaning unit of the present utility model;

[0031] Figure 7 is Figure 6 The partial schematic view at position A in Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the specific embodiments and corresponding drawings of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] A dust removal device for the surface of a circuit board according to an embodiment of the present application, as Figures 1 - 5 shown, which includes: a frame 1 for supporting; a moving wheel 11 for facilitating movement is provided at the bottom of the frame 1; a foot cup 12 is provided at the bottom of the frame 1. During the movement, the foot cup 12 is in a retracted state, and when the movement is in place, the foot cup 12 is in a supporting and limiting state. The structures of the moving wheel 11 and the foot cup 12 are both prior arts and will not be elaborated here;

[0034] A substrate conveying unit 2, connected to the frame 1;

[0035] A roller cleaning unit 3, connected to the frame 1; the roller cleaning unit 3 is located above the substrate conveying unit 2;

[0036] A brush cleaning unit 4, connected to the frame 1; the brush cleaning unit 4 is located at the entrance of the substrate conveying unit 2.

[0037] In one embodiment, as Figures 2 - 5As shown in the figure, the substrate conveying unit 2 includes a hexagonal shaft 21 rotatably connected to the frame 1. The first conveying side plate 22 and the second conveying side plate 23 are respectively connected to the hexagonal shaft 21 at intervals through transmission wheels 24. A conveying channel for the circuit board is formed between the first conveying side plate 22 and the second conveying side plate 23. The shaft hole of the transmission wheel 24 is connected to the hexagonal shaft 21. When the hexagonal shaft 21 rotates, it can drive the transmission wheel 24 to rotate. At the same time, the transmission wheel 24 can move axially on the hexagonal shaft 21, so that the distance between the first conveying side plate 22 and the second conveying side plate 23 can be adjusted. A plurality of belt pulleys 25 are respectively arranged on the inner sides of the first conveying side plate 22 and the second conveying side plate 23. The plurality of belt pulleys 25 are connected to the corresponding transmission wheels 24 through transmission belts 26. The circuit board is conveyed under the two transmission belts 24. It should be noted that the positions and connection methods of the plurality of belt pulleys 25 and the corresponding transmission wheels 24 are prior arts. For example, a PCB substrate conveying device that is easy to replace, disclosed in the publication number CN217457499U, will not be elaborated here. One end of the hexagonal shaft 21 is connected to a first driving part 211 arranged on the frame 1. The first driving part 211 is a rotary motor, which is a prior art and its structure will not be elaborated. When the first driving part 211 works, it drives the transmission belt 24 to work, thereby realizing the conveying of the circuit board.

[0038] It further includes a threaded rod 26 rotatably connected to the frame 1. A first screw block is arranged on the first conveying side plate 22, and a second screw block is arranged on the second conveying side plate 23. The first screw block and the second screw block are respectively threadedly connected to the threaded rod 26. Under the action of the threaded rod 26, the first conveying side plate 22 and the second conveying side plate 23 move in opposite or opposite directions, thereby realizing the decrease or increase of the distance between the first conveying side plate 22 and the second conveying side plate 23 to adapt to the dust removal work of circuit boards with different widths. It should be noted that the distance between the first conveying side plate 22 and the second conveying side plate 23 is within the range of the frame 1. One end of the threaded rod 26 is connected with an adjustment knob 27 and / or a numerical display 28. The structure of the numerical display 28 is a prior art and will not be elaborated here. The numerical display 28 is used to display the adjusted value.

[0039] In one embodiment, as Figure 2 shown, in order to make the first conveying side plate 22 and the second conveying side plate 23 more stable during the adjustment process, a first slider 29 is arranged on the first conveying side plate 22, and a second slider 210 is arranged on the second conveying side plate 23. The first slider 29 and the second slider 210 are respectively slidably connected to a guide shaft 211 arranged on the frame 1.

[0040] In one embodiment, as Figures 2 - 5As shown, the roller cleaning unit 3 includes a dust removal rubber roller 31 rotatably connected to the frame 1. When there are two or more dust removal rubber rollers 31, adjacent dust removal rubber rollers 31 are linked through gear meshing. One end of the dust removal rubber roller 31 is connected to the output end of the first driving part 212 through an intermediate transmission part. The intermediate transmission part is a gear transmission assembly, which is prior art. For example, a first driving gear is connected to the output end of the first driving part 212, and a second driven gear meshing with the first driving gear is connected to one end of the dust removal rubber roller 31, which will not be elaborated here.

[0041] It further includes a height adjustment mechanism 32. The dust removal rubber roller 31 is connected to the frame 1 through the height adjustment mechanism. The structure of the height adjustment mechanism 32 is prior art. Refer to a substrate gap adjustment device for a roller-type dust removal device disclosed in the publication number CN220574235U, which will not be elaborated here. It should be noted that based on the relatively small relative change in the thickness of different circuit boards, the adjustment space for the gap between the dust removal rubber roller 31 and the conveying plane of the conveying channel is relatively small, and the influence on the intermediate transmission part is relatively small. That is, under the fine adjustment state, the intermediate transmission part can achieve transmission, which will not be elaborated here.

[0042] A sticky dust paper fixing shaft 33 is connected to the lifting end of the height adjustment mechanism 32. A sticky dust paper fixing block 34 is rotatably connected to the sticky dust paper fixing shaft 33. A drum-type sticky dust paper 35 is connected to the sticky dust paper fixing block 34. The drum-type sticky dust paper 35 cooperates with the dust removal rubber roller 31. The drum-type sticky dust paper 35 presses on the dust removal rubber roller 31. The dust removal rubber roller 31 rolls in contact with the circuit board for conveying, realizing the adhesion of foreign matters on the surface of the circuit board to the surface of the dust removal rubber roller 31, and then the adhesion of the foreign matters on the surface of the dust removal rubber roller 31 to the drum-type sticky dust paper 35 with higher viscosity, thus realizing the dust removal work.

[0043] In an embodiment, as Figures 6 - 7 shown, the brush cleaning unit 4 includes a first cleaning unit 41 arranged above the conveying channel and a second dust suction unit 42 arranged below the conveying channel.

[0044] The first cleaning unit 41 includes a fixing member 411 provided on the frame 1. The fixing member 411 is a fixing plate. A lifting power unit 412 is connected to the fixing member 411. The lifting power unit 412 is a cylinder, which is a prior art and will not be elaborated here. There are two lifting power units 412, and the two lifting power units 412 are respectively located on the left and right sides of the fixing member 411. The movable end of the lifting power unit 412 is connected to a brush fixing part 413. A brush 414 is rotatably connected to the brush fixing part 413. The brush 414 is a drum-type brush, and its structure is a prior art and will not be elaborated here. The two ends of the brush 414 are respectively rotatably connected to the brush fixing part 413 through bearings 415. The brush 414 has a preset interval from the conveying surface of the conveying channel, and this preset interval is adapted to the thickness of the dust removal product. One end of the brush 414 is connected to a second driven gear 416.

[0045] It further includes a second driving part 417. The second driving part 417 is provided on the side of the conveying channel. The second driving part 417 is a motor, and its structure will not be elaborated here. The output end of the second driving part 417 is connected to a second driving gear 418 through a gear connecting shaft, and the gear connecting shaft is a prior art and will not be elaborated here. The second driving gear 418 meshes with the second driven gear 416. When the second driving part 417 works, it drives the second driving gear 418 to rotate. The second driving gear 418 drives the second driven gear 416 to rotate, thereby realizing the rotation of the brush 414 for cleaning work.

[0046] In an embodiment, it further includes a connecting component. One end of the brush 414 is connected to the second driven gear 416 through the connecting component. The connecting component includes a connecting shaft rod 419. A rotating part 4110 is connected to the connecting shaft rod 419. The rotating part 4110 is a bearing and will not be elaborated here. The rotating part 4110 is connected to the brush fixing part 413. The connecting shaft rod 419 can rotate relative to the brush fixing part 413 through the rotating part 4110. At this time, one end of the brush 414 and the connecting shaft rod 419 share the same rotating part, which saves costs and makes the installation more convenient. One end of the brush 414 is detachably connected to one end of the connecting shaft rod 419. For example, one end of the brush 414 forms a rectangular rod, and the rectangular rod is connected to the rectangular hole on one end of the connecting shaft rod 419 to realize the linkage between the brush 14 and the connecting shaft rod 419. The second driven gear 416 is connected to the other end of the connecting shaft rod 419. Through the design of the connecting shaft rod 419, the disassembly, assembly and replacement between the second driven gear 416 and the brush 414 are more convenient.

[0047] In an embodiment, such as Figures 6 - 7As shown, the first cleaning unit 41 further includes a first dust suction housing 4111 connected to the brush fixing part 413. The first dust suction housing 4111 has a first dust suction inlet 4112 and a first dust suction outlet, and the first dust suction inlet 4112 and the first dust suction outlet are in communication; the first dust suction inlet 4112 is located above the brush 414; the first dust suction outlet is in communication with the dust suction port of a dust collector. It should be noted that the dust collector is a prior art, and its structure and principle will not be elaborated here; the first dust suction outlet is connected to the dust suction port of the dust collector through a first dust suction pipe 4114; the first dust suction pipe 4114 is in communication with the first dust suction outlet through a telescopic hose 4115.

[0048] Specifically, the second dust suction unit 42 includes a second dust suction housing 421 provided below the conveying channel. The second dust suction housing 421 has a second dust suction inlet 422 and a second dust suction outlet 423. The second dust suction inlet 422 and the second dust suction outlet 423 are in communication, and the second dust suction outlet 423 is in communication with the dust suction port of the dust collector. It should be noted that the dust collector is a prior art, and its structure and principle will not be elaborated here.

[0049] During implementation, when the product to be cleaned is conveyed to below the brush 414 through the conveying channel, the lifting power part 412 acts to drive the brush 414 to descend, so that the brush 414 contacts the surface of the product. At the same time, the second driving part 417 drives the brush 414 to rotate on the surface of the product. The fine dust on the product is sucked away by the first dust suction housing 4111 above the brush 414 and the second dust suction housing 421 below it with the cooperation of the dust collector; thus, the cleaning ability of the dust removal device for the circuit board surface is greatly improved.

[0050] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0052] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary statements, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the scope of protection of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0053] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above", etc. may be used here to describe the spatial positional relationships of a device or feature shown in the drawings with other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation described in the drawings of the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0054] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above terms have no special meanings. Therefore, it should not be construed as limiting the scope of protection of the present application.

[0055] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] The above are only the preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model shall fall within the scope covered by the present utility model.

Claims

1. A dust removal device for the surface of a circuit board, characterized in that, It includes: A frame; A substrate conveying unit connected to the frame; A roller cleaning unit connected to the frame; The roller cleaning unit is located above the substrate conveying unit; A brush cleaning unit connected to the frame; the brush cleaning unit is located at the entrance of the substrate conveying unit.

2. The dust removal device for the circuit board surface according to claim 1, wherein, The substrate conveying unit includes a hexagonal shaft rotatably connected to the frame. A first conveying side plate and a second conveying side plate are respectively connected to the hexagonal shaft at intervals through transmission wheels. A conveying channel for the circuit board is formed between the first conveying side plate and the second conveying side plate. The shaft hole of the transmission wheel is connected to the hexagonal shaft, and the hexagonal shaft can drive the transmission wheel to rotate. At the same time, the transmission wheel can move axially along the hexagonal shaft. A plurality of belt pulleys are respectively arranged on the inner sides of the first conveying side plate and the second conveying side plate. The plurality of belt pulleys are connected to the corresponding transmission wheels through conveyor belts. One end of the hexagonal shaft is connected to a first driving part arranged on the frame.

3. The dust removal device for the circuit board surface according to claim 2, characterized in that, It further includes a threaded rod rotatably connected to the frame. A first screw block is arranged on the first conveying side plate, and a second screw block is arranged on the second conveying side plate. The first screw block and the second screw block are respectively threadedly connected to the threaded rod. Under the action of the threaded rod, the first conveying side plate and the second conveying side plate move towards or away from each other.

4. The dust removal device for the circuit board surface according to claim 3, characterized in that, One end of the threaded rod is connected with an adjustment knob and / or a numerical display.

5. The surface dust removal device for circuit boards according to claim 3, characterized in that A first slider is arranged on the first conveying side plate, and a second slider is arranged on the second conveying side plate. The first slider and the second slider are respectively slidably connected to a guide shaft arranged on the frame.

6. The surface dust removal device for circuit boards according to claim 1, characterized in that, The roller cleaning unit includes a dust removal rubber roller rotatably connected to the frame. One end of the dust removal rubber roller is connected to the output end of the first driving part through an intermediate transmission part, and the intermediate transmission part is a gear transmission assembly; It further includes a height adjustment mechanism. The dust removal rubber roller is connected to the frame through the height adjustment mechanism. A sticky dust paper fixing shaft is connected to the lifting end of the height adjustment mechanism. A sticky dust paper fixing block is rotatably connected to the sticky dust paper fixing shaft. A drum-shaped sticky dust paper is connected to the sticky dust paper fixing block, and the drum-shaped sticky dust paper cooperates with the dust removal rubber roller.

7. The dust removal device for the circuit board surface according to claim 1, wherein, The brush cleaning unit includes a first cleaning unit arranged above the conveying channel and a second dust suction unit arranged below the conveying channel; The first cleaning unit includes a fixing part arranged on the frame, and a lifting power part is connected to the fixing part. There are two lifting power parts, and the two lifting power parts are respectively located on the left and right sides of the fixing part. The movable end of the lifting power part is connected to a brush fixing part, and a brush is rotatably connected to the brush fixing part. Both ends of the brush are rotatably connected to the brush fixing part through bearings. The brush has a preset interval from the conveying surface of the conveying channel, and this preset interval is adapted to the thickness of the dust removal product. One end of the brush is connected with a second driven gear. It further includes a second driving part arranged on the side of the conveying channel. The output end of the second driving part is connected with a second driving gear through a gear connecting shaft, and the second driving gear meshes with the second driven gear.

8. The surface dust removal device for circuit boards according to claim 7, wherein, It further includes a connecting component, one end of the brush is connected to the second driven gear through the connecting component; the connecting component includes a connecting shaft rod, and a rotating part is connected to the connecting shaft rod; the rotating part is connected to the brush fixing part, and the connecting shaft rod can rotate relative to the brush fixing part through the rotating part. At this time, one end of the brush and the connecting shaft rod share the same rotating part; one end of the brush is detachably connected to one end of the connecting shaft rod; the second driven gear is connected to the other end of the connecting shaft rod.

9. The dust removal device for the circuit board surface according to claim 8, wherein, The first cleaning unit further includes a first dust suction housing connected to the brush fixing part. The first dust suction housing has a first dust suction inlet and a first dust suction outlet, and the first dust suction inlet and the first dust suction outlet are connected; the first dust suction inlet is located above the brush; the first dust suction outlet is connected to the dust suction port of the dust suction machine; the first dust suction outlet and the dust suction port of the dust suction machine are connected by a first dust suction pipe; the first dust suction pipe and the first dust suction outlet are connected by a telescopic hose. The second dust suction unit includes a second dust suction housing provided below the conveying channel. The second dust suction housing has a second dust suction inlet and a second dust suction outlet, the second dust suction inlet and the second dust suction outlet are connected, and the second dust suction outlet is connected to the dust suction port of the dust suction machine.

10. The dust removal device for the circuit board surface according to claim 1, characterized in that, Moving wheels and / or feet are provided at the bottom of the frame.

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