PCB cleaning device

Abstract

The application relates to the technical field of PCB cleaning, and particularly discloses a PCB cleaning device which comprises a conveying assembly arranged in a shell and used for conveying a PCB, further comprises a cleaning roller and a dust removal adhesive tape located above the conveying assembly, the dust removal adhesive tape and the side surface of the cleaning roller abut against each other, and the shell is further provided with a cleaning assembly, the cleaning assembly comprises a dust blowing pipe connected with an air pump and a dust suction box connected with a vacuum pump, the dust blowing pipe and the dust suction box are respectively located on the inner side and the outer side of the dust removal adhesive tape, and the side, close to each other, of the dust blowing pipe and the dust suction box is respectively provided with a dust blowing hole and a dust suction hole; when the conveying assembly conveys the PCB to pass through the cleaning roller, the cleaning roller rotates to clean the PCB; meanwhile, the dust removal adhesive tape rotates synchronously to strip and transfer the impurities adhered to the surface of the cleaning roller; then the dust blowing pipe blows the dust removal adhesive tape, and the dust suction box synchronously absorbs the impurities; the PCB cleaning device has the effect of improving the cleaning efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PCB cleaning, and particularly relates to a PCB cleaning device. BACKGROUND

[0002] PCB is a kind of substrate which realizes electrical connection of electronic components by patterning conductive copper foil on the surface of insulating material. During the processing of PBC board, dust or metal particles may exist on the surface of the PBC board, or there may be residual organic acid and ionic impurities after welding, which affects subsequent processing, so the PBC board needs to be cleaned.

[0003] A patent document with publication number CN209349125U discloses a kind of PCB online cleaning device, including conveying mechanism, online cleaning mechanism and several PCB, conveying mechanism includes transmission shaft, transmission shaft drives transmission belt and the metal net of sleeve in transmission belt, online cleaning mechanism includes dust collection device, lifting adjusting mechanism, several cleaning rollers and a layer of bristles covering the surface of cleaning roller, dust collection device includes dust collector, exhaust hood and the exhaust pipe of communication dust collector and exhaust hood, the air inlet of exhaust hood located above several cleaning rollers covers several cleaning rollers, several PCB are placed on the metal net outside transmission belt, the transmission end of several cleaning rollers located above transmission belt is all fixed on lifting adjusting mechanism and is driven lifting adjusting mechanism to lift and lower.Lifting adjusting mechanism includes support, lifting platform and lifting motor, the top of support movably fixes the lifting platform, the bottom of lifting platform is connected with lifting motor, the transmission end of several cleaning rollers is fixed on the side of lifting platform.It also includes connecting rod, one end of connecting rod is fixed on the side of lifting platform, the other end of connecting rod is fixedly connected with the exhaust hood.Bristle is detachably covered outside cleaning roller.

[0004] The above scheme drives transmission belt transmission by setting transmission shaft in conveying mechanism, the metal net on transmission belt is used to carry PCB, and a layer of bristles outside several cleaning rollers driven by lifting adjusting mechanism is matched to clean dust on the surface of different PCB.

[0005] But the following problems still exist in the scheme, although the scheme realizes PCB cleaning by conveying mechanism and cleaning roller, but it does not solve the problem that the dust outside cleaning roller gradually increases with the increase of cleaning time.This problem will directly lead to the significant decline of cleaning effect of cleaning roller on subsequent PCB, the dust or metal particles that can be effectively removed cannot be completely removed, and the residual impurities will be attached to the surface of PCB, thereby affecting the precision and quality of subsequent welding, assembly and other processing procedures.Moreover, if the cleaning roller with a large amount of dust continues to work, it may also cause secondary pollution of dust on the surface of PCB, increase the product failure rate.In addition, in order to ensure the cleaning effect, the staff needs to clean the cleaning roller frequently, which not only interrupts the production process and reduces the production efficiency. SUMMARY

[0006] The application provides a PCB cleaning device, aiming at solving the problem of dust accumulation on the outer layer of the cleaning roller of the PCB cleaning device in the related art after long-time work, which leads to the decline of the subsequent PCB cleaning effect, easy secondary pollution, frequent shutdown for cleaning, reduced production efficiency and increased labor cost.

[0007] The PCB cleaning device comprises a conveying assembly arranged in the shell for conveying the PCB, and further comprises a cleaning roller and a dust removal adhesive belt located above the conveying assembly, the dust removal adhesive belt abutting against the side surface of the cleaning roller; the shell is further provided with a cleaning assembly, the cleaning assembly comprises a dust blowing pipe connected with an air pump and a dust suction box connected with a vacuum pump, the dust blowing pipe and the dust suction box are respectively located on the inner and outer sides of the dust removal adhesive belt, and the side close to each other of the dust blowing pipe and the dust suction box is respectively provided with a dust blowing hole and a dust suction hole; when the conveying assembly conveys the PCB to pass through the cleaning roller, the cleaning roller rotates to clean the PCB; at the same time, the dust removal adhesive belt rotates synchronously to strip and transfer the impurities adhered to the surface of the cleaning roller; then the dust blowing pipe blows the dust removal adhesive belt, and the dust suction box synchronously collects the impurities.

[0008] The effect is that the cleaning roller is arranged to clean the PCB, and the dust removal adhesive belt is arranged to clean the cleaning roller during the cleaning process, so as to ensure the cleaning performance of the cleaning roller. Specifically, the conveying assembly drives the PCB to move through the cleaning roller, the cleaning roller rotates to clean the PCB, the dust removal adhesive belt abuts against the cleaning roller and rotates synchronously, the dust removal adhesive belt can remove the impurities and dust on the cleaning roller, then the dust blowing plate blows the dust removal adhesive belt to remove the impurities on the surface of the dust removal adhesive belt, and the dust suction box collects the blown dust, so as to ensure the cleaning effect of the dust removal adhesive belt and the cleaning effect of the cleaning roller, avoid the phenomenon that the PCB is secondarily polluted due to too much impurities on the surface of the cleaning roller, reduce the replacement frequency of the cleaning roller, and improve the production efficiency.

[0009] Preferably, a pushing member is arranged in the shell, the output end of the pushing member is connected with the cleaning roller to drive the cleaning roller to move up and down, and the cleaning roller comprises a plurality of cleaning plates arranged in the circumferential direction, the center line of the cleaning plate is perpendicular to the cleaning plate.

[0010] The effect is that the pushing member is arranged to be connected with the cleaning roller, the pushing member can drive the cleaning roller to move up and down, and the distance between the cleaning roller and the conveying assembly can be adjusted to adapt to PCBs of different thickness specifications.

[0011] Preferably, two upper guide rollers are horizontally and spacedly arranged in the dust removal sticky belt, a lower guide roller is arranged below the upper guide rollers, the part of the dust removal sticky belt between the two upper guide rollers is horizontally arranged, the part of the dust removal sticky belt between the upper guide roller and the lower guide roller is obliquely arranged, the dust blowing pipe and the dust suction box are respectively arranged at the two sides of the horizontally arranged part of the dust removal sticky belt, and the obliquely arranged part of the dust removal sticky belt abuts against the side surface of the cleaning roller.

[0012] Preferably, a pressing assembly is arranged in the dust removal sticky belt, the pressing assembly comprises an elastic member one connected with the shell and a pressing plate connected with the elastic member one, the side of the pressing plate away from the elastic member one abuts against the obliquely arranged part of the dust removal sticky belt, the elastic member one is used for driving the pressing plate to move towards the direction of the cleaning roller axis, and the line connecting the center of the pressing plate and the cleaning roller axis is perpendicular to the pressing plate.

[0013] The effect is that the elastic member one drives the pressing plate to move close to the oblique part of the dust removal sticky belt, so that the oblique part of the dust removal sticky belt contacts the cleaning plate, the contact area of the two is increased, and the cleaning effect on the cleaning plate is further improved.

[0014] Preferably, the end of the cleaning roller is coaxially provided with a mounting plate, a plurality of protrusions are circumferentially arranged on the mounting plate, the protrusions correspond to the gaps between two adjacent cleaning plates, the end of the pressing plate extends to the outside of the dust removal sticky belt and corresponds to the protrusions, when the cleaning roller drives the protrusions to rotate to the pressing plate, the protrusions cooperate with the pressing plate to drive the pressing plate to move away from the cleaning roller, and the pressing plate moves while compressing the elastic member one.

[0015] The effect is that when the cleaning roller rotates, the mounting plate and the protrusions synchronously rotate, the plurality of protrusions rotate through the pressing plate in sequence, and under the action of the elastic member one, the corresponding part of the dust removal sticky belt reciprocates, so that when each cleaning plate rotates to the dust removal sticky belt, the pressing plate can press the oblique part of the dust removal sticky belt to abut against the cleaning plate, and the cleaning effect on the cleaning plate is improved.

[0016] Preferably, the cleaning roller is a hollow structure, an eccentric guide rod is coaxially arranged in the cleaning roller, the eccentric guide rod is fixedly connected with the output end of the pushing member, the protrusion of the eccentric guide rod is arranged in the direction towards the pressing plate, a plurality of top plates are circumferentially arranged on the cleaning roller, the top plates are located between two adjacent cleaning plates, the top plates slide in the direction towards the cleaning roller axis, a top rod is rotationally arranged on the side of the top plate away from the cleaning roller, when the top plate rotates to the protrusion of the eccentric guide rod along with the cleaning roller, the protrusion of the eccentric guide rod drives the top rod to move in the direction towards the pressing plate, so that the top rod abuts against the dust removal sticky belt.

[0017] Its effect lies in, by setting eccentric guide rod in the cleaning roller, when the top plate rotates to the protrusion on the eccentric guide rod, the protrusion of the eccentric guide rod drives the top plate to move close to the dust removal sticky tape, the dust removal sticky tape is lifted by the top rod, at this time the protrusion drives the pressing plate to separate from the dust removal sticky tape, the top rod drives the dust removal sticky tape to separate from the cleaning plate, and the top rod and the top plate rotate, the friction between the top rod and the dust removal sticky tape is small, so as to rotate the dust removal sticky tape to adjust its position.

[0018] Preferably, the housing is horizontally slidably provided with a mounting sleeve, the end of the upper guide roller is rotationally connected with the mounting sleeve, and the housing is provided with a second elastic member connected with the mounting sleeve, and the second elastic member is used for driving the upper guide roller to move away from the other upper guide roller.

[0019] Its effect lies in that the upper guide roller is connected with the second elastic member through the mounting sleeve, so that the upper guide roller can slide in the horizontal direction, and when the pressing plate presses the dust removal sticky tape or the top rod pushes the dust removal sticky tape, the upper guide roller moves and compresses the second elastic member, so that the dust removal sticky tape is kept in a tension state during the process.

[0020] Preferably, the eccentric guide rod is provided with a clamping groove in the circumferential direction, and the side, close to the eccentric guide rod, of the top plate is provided with a clamping rod, which is clamped in the clamping groove and is in sliding connection with the clamping groove.

[0021] Its effect lies in that the clamping rod and the clamping groove are buckled to keep the top plate and the eccentric guide rod in cooperation, avoiding disengagement of the two.

[0022] Preferably, the lower guide roller corresponds to the position between the two upper guide rollers, the cleaning roller is provided with two groups, the lower guide roller is located between the two cleaning rollers, and the two inclined positions on the dust removal sticky tape are in abutment with the side surfaces of the two cleaning rollers, respectively.

[0023] Preferably, the pressing plate and the cleaning plate are arranged in a direction parallel to the axis of the cleaning roller, and the width of the pressing plate is greater than the width of the cleaning plate.

[0024] Beneficial effects:

[0025] By setting the dust removal sticky tape in abutment with the side surface of the cleaning roller, the closed dust removal sticky tape is in close abutment with the inclined position of the cleaning roller under the action of the pressing assembly, and the impurities adhering to the surface of the cleaning roller are peeled off in real time, so that the cleaning capacity of the cleaning roller is not reduced due to accumulation of impurities. Meanwhile, the dust blowing pipe and the dust suction box are arranged to clean the dust removal sticky tape, so as to ensure the cleaning capacity of the dust removal sticky tape, reduce the replacement frequency of the cleaning roller, and improve the cleaning efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0027] Figure 2 It is a schematic diagram of the structure of the dust removal sticky tape in the present application.

[0028] Figure 3 is Figure 2 a structural schematic view at A in FIG. 1.

[0029] Figure 4 is Figure 2 a structural schematic view at B in FIG. 1.

[0030] Figure 5 is a schematic view of the positional relationship between the pressing plate and the dust-removing sticky tape in the present application.

[0031] Figure 6 is a schematic view of the positional relationship between the cleaning roller and the dust-removing sticky tape in the present application.

[0032] Figure 7 is a structural schematic view of the pressing assembly in the present application.

[0033] Figure 8 is a structural schematic view of the conveying assembly in the present application.

[0034] Figure 9 is a structural schematic view of the eccentric guide rod and the top plate in the present application.

[0035] Reference signs:

[0036] 1, housing; 11, vacuum pump; 2, conveying assembly; 21, conveying plate; 211, adjusting screw; 22, conveying motor; 23, conveying belt; 3, cleaning roller; 31, cleaning plate; 32, mounting plate; 321, protrusion; 4, dust-removing sticky tape; 41, horizontal position; 42, inclined position; 5, cleaning assembly; 51, dust blowing pipe; 511, dust blowing hole; 52, dust suction box; 521, dust suction hole; 6, pushing member; 7, upper guide roller; 71, lower guide roller; 72, mounting sleeve; 73, elastic member two; 8, pressing assembly; 81, elastic member one; 82, pressing plate; 9, eccentric guide rod; 91, top plate; 911, top rod; 912, clamping rod; 92, clamping groove. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0038] As Figures 1 to 9The PCB cleaning device of the present application is shown, which comprises a conveying assembly 2, a cleaning roller 3, a dust-sticking belt 4 and a cleaning assembly 5 arranged in a housing 1. The conveying assembly 2 is used for conveying the PCB, the cleaning roller 3 and the dust-sticking belt 4 are arranged above the conveying assembly 2, the dust-sticking belt 4 abuts against the side surface of the cleaning roller 3, and the cleaning roller 3 is arranged apart from the conveying assembly 2 so that the conveying assembly 2 can drive the PCB to pass below the cleaning roller 3 when conveying the PCB. The dust-sticking belt 4 is used for cleaning the impurities adhered to the cleaning roller 3, and the cleaning assembly 5 is used for cleaning the dust-sticking belt 4.

[0039] When cleaning the PCB, the conveying assembly 2 conveys the PCB and drives the PCB to move to pass below the cleaning roller 3. When the PCB moves to the cleaning roller 3, the side surface of the cleaning roller 3 contacts the PCB, and the cleaning roller 3 rotates to clean the PCB. At the same time, the dust-sticking belt 4 rotates to strip and transfer the impurities adhered to the surface of the cleaning roller 3. Then, the cleaning assembly 5 is used to clean the impurities on the dust-sticking belt 4, so as to ensure the cleaning effect of the dust-sticking belt 4 on the cleaning roller 3, thereby avoiding the influence of the accumulated impurities on the cleaning effect of the cleaning roller 3, reducing the secondary pollution of the PCB, reducing the replacement frequency of the cleaning roller 3, and improving the cleaning efficiency of the PCB.

[0040] Referring to Figure 2 , Figure 3 , Figure 6 A pushing member 6 is arranged in the housing 1, which is arranged as a pneumatic cylinder. The pushing member 6 is arranged in the vertical direction in the housing 1, and the output end of the pushing member 6 is connected with the cleaning roller 3. The pushing member 6 drives the cleaning roller 3 to move up and down, thereby adjusting the distance between the cleaning roller 3 and the conveying assembly 2 to adapt to the cleaning of PCBs with different thickness specifications.

[0041] Referring to Figure 2 , Figure 3 , Figure 6The cleaning roller 3 comprises a plurality of cleaning plates 31 arranged circumferentially around the rotation axis of the cleaning roller 3, the cleaning plates 31 are arranged along the radial direction perpendicular to the cleaning roller 3, and the center line of the cleaning plate 31 is perpendicular to the line connecting the axis of the cleaning roller 3, that is, the center line of the cleaning plate 31 and the axis of the cleaning roller 3 are in the same plane, and the cleaning plate 31 is arranged perpendicular to the plane. The side of the cleaning plate 31 away from the axis of the cleaning roller 3 is provided with bristles for cleaning impurities and dust. By arranging the bristles on the cleaning plate 31, the outer surface of the cleaning roller 3 is in the shape of a regular polygon. When cleaning PCB boards with different height elements, the edges of the polygonal cleaning roller 3 can more effectively cut into the small gaps and uneven areas of the surface of the PCB board, thereby removing more contaminants; and the arrangement of a plurality of cleaning plates 31 can increase the contact area of the bristles with the surface of the PCB board, thereby covering more cleaning area in unit time.

[0042] Referring to Figure 2 , Figure 8 The conveying assembly 2 comprises a conveying plate 21, a conveying motor 22 and a conveying belt 23. The conveying motor 22 is mounted on the conveying plate 21, and the output end of the conveying motor 22 is connected with the conveying belt 23, that is, the conveying motor 22 can drive the conveying belt 23 to rotate. The conveying belt 23 is located below the cleaning roller 3 and is arranged in a spaced manner with the cleaning roller 3. The gap between the two is slightly smaller than the thickness of the PCB board, so that when the PCB board moves past the cleaning roller 3, the bristles on the surface of the cleaning roller 3 can be moderately attached to the upper and lower surfaces of the PCB board, avoiding excessive extrusion and damage to the board, and fully cleaning the surface of the welding slag, dust and other impurities, maximizing the cleaning effect.

[0043] In order to adapt to PCB boards of different sizes, the conveying plate 21, the conveying motor 22 and the conveying belt 23 are symmetrically arranged in two groups. The first group of conveying plates 21 near the equipment shell 1 is fixedly connected with the reinforcing ribs on the inner wall of the shell 1 by welding, and the position is kept constant. The other group of conveying plates 21 is slidably assembled with the pre-set linear guide rail on the inner side of the shell 1 through the sliding block at the bottom, and can move left and right along the horizontal direction. In the middle of the shell 1 between the two groups of conveying plates 21, a regulating screw 211 with positive and negative threads is also rotatably assembled. One end of the regulating screw 211 extends to the outside of the shell 1 and is connected with a knob type hand wheel, and the other end penetrates through the threaded hole on the side of the sliding conveying plate 21 and forms a threaded cooperation therewith. The operator only needs to rotate the regulating screw 211 clockwise or counterclockwise, thereby adjusting the distance between the two groups of conveying plates 21 to adapt to the conveying of PCB boards of different specifications.

[0044] Referring to Figure 2 , Figure 4The cleaning assembly 5 comprises a dust blowing pipe 51 and a dust suction box 52, the dust removal adhesive tape 4 is in a closed structure with the first end connected to the second end, the dust blowing pipe 51 is arranged inside the dust removal adhesive tape 4, the dust suction box 52 is arranged outside the dust removal adhesive tape 4, that is, the dust blowing pipe 51 and the dust suction box 52 are arranged in a spaced manner, the dust blowing pipe 51 is provided with a dust blowing hole 511, the dust blowing hole 511 is arranged on the side of the dust blowing pipe 51 close to the dust suction box 52, the dust suction box 52 is provided with a dust suction hole 521, and the dust suction hole 521 is arranged on the side of the dust suction box 52 close to the dust suction plate. The dust blowing pipe 51 is connected with an air pump (not shown in the figure), the air pump is used for blowing air through the dust blowing hole 511 on the dust blowing pipe 51, the dust suction box 52 is connected with a vacuum pump 11, and the vacuum pump 11 is used for keeping the inside of the dust suction box 52 in a negative pressure state to generate suction force through the dust suction hole 521.

[0045] Specifically, the airflow generated by the air pump is transported through the dust blowing pipe 51, and the dust blowing hole 511 arranged on the side of the dust blowing pipe 51 close to the dust suction box 52 is used to direct the airflow to the surface of the dust removal adhesive tape 4, and the impurities and dust adhered to the adhesive tape are blown away by the impact force of the airflow; at the same time, the vacuum pump 11 connected with the dust suction box 52 is started to form a negative pressure in the dust suction box 52, so that the dust suction hole 521 on the side of the dust suction box 52 close to the dust suction plate generates suction force, so as to quickly suck the dust and impurities blown away by the airflow into the inside of the dust suction box 52, finally complete the efficient removal and centralized collection of impurities, and ensure that the dust removal adhesive tape 4 continuously maintains a clean state to maintain the subsequent dust removal effect.

[0046] In order to remove the impurities and dust on the surface of the dust removal adhesive tape 4 when blowing air, and facilitate the collection of the impurities and dust, the dust removal adhesive tape 4 is made of a fiber fabric or a porous film with flexibility and air permeability, so that the blowing airflow generated by the air pump can smoothly penetrate the adhesive tape and effectively strip the impurities adhered to the surface. The surface of the dust removal adhesive tape 4 is coated with an adhesive with a certain viscosity, and the adhesive must have stable viscosity maintaining ability to clean the cleaning roller 3 when the dust removal adhesive tape 4 contacts the cleaning roller 3. In this embodiment, the blowing force of the blowing air is greater than the viscosity of the adhesive, so that the impurities and dust on the surface can be removed when blowing air.

[0047] Referring to Figure 2 , Figure 5 The upper guide rollers 7 and the lower guide roller 71 are arranged in the shell 1, the upper guide rollers 7 and the lower guide roller 71 are both located in the dust removal adhesive tape 4, the upper guide rollers 7 are provided with two, and the two upper guide rollers 7 are arranged in a spaced manner along the horizontal direction, the lower guide roller 71 is provided with one, and the lower guide roller 71 is located below the upper guide rollers 7. The dust removal adhesive tape 4 is arranged outside the upper guide rollers 7 and the lower guide roller 71, that is, the upper guide rollers 7 and the lower guide roller 71 are both in abutment with the inner side of the dust removal adhesive tape 4 to support the dust removal adhesive tape 4. A motor connected with the lower guide roller 71 is arranged in the shell 1, the output shaft of the motor is coaxially connected with the lower guide roller 71 to drive the dust removal adhesive tape 4 to rotate.

[0048] With reference to Figure 5 After the upper guide rollers 7 and the lower guide roller 71 support the dust removal sticky belt 4, the part of the dust removal sticky belt 4 between the two upper guide rollers 7 is in a horizontal position 41, and the part of the dust removal sticky belt 4 between the upper guide roller 7 and the lower guide roller 71 is in an inclined position 42. The dust blowing pipe 51 and the dust suction box 52 are respectively located on the upper and lower sides of the horizontal position 41, so that the corresponding area of the dust removal sticky belt 4 is maximized when blowing and suction, thereby improving the cleaning effect on the dust removal sticky belt 4. The inclined position 42 is in abutment with the side surface of the cleaning roller 3. When the cleaning roller 3 rotates, the cleaning plate 31 can be driven to abut against the inclined position 42, so as to increase the contact area between the dust removal sticky belt 4 and the cleaning plate 31, thereby improving the cleaning effect on the cleaning plate 31.

[0049] Due to the arrangement of the two upper guide rollers 7 and the lower guide roller 71, the dust removal sticky belt 4 forms two inclined positions 42 and one horizontal position 41. The position of the lower guide roller 71 corresponds to the middle of the two upper guide rollers 7, so that the inclined angles of the two inclined positions 42 on the dust removal sticky belt 4 are the same. The cleaning roller 3 is correspondingly provided with two groups, and the two groups of cleaning rollers 3 are arranged in sequence along the PCB plate conveying path, and the two groups of cleaning rollers 3 correspond to the two inclined positions 42 respectively. The arrangement of the two cleaning rollers 3 can repeatedly clean the PCB plate. At the same time, the dust removal sticky belt 4 can clean the impurities and dust on the two cleaning rollers 3 at the same time, so as to avoid the failure of the cleaning roller 3 due to the accumulation of impurities, reduce the frequency of equipment downtime maintenance, further guarantee the cleaning efficiency and stability during the continuous production of the PCB plate, and improve the cleaning efficiency of the PCB plate. At the same time, the inclined angles of the two inclined positions 42 are consistent, so as to ensure that the dust removal sticky belt 4 is balanced and not deviated when running.

[0050] With reference to Figure 2 , Figure 3 , Figure 5 The pressing assembly 8 is arranged in the dust removal sticky belt 4. The pressing assembly 8 comprises a first elastic member 81 and a pressing plate 82. The first elastic member 81 is a spring. One end of the first elastic member 81 is connected with the shell 1, and the other end is connected with the pressing plate 82. The pressing plate 82 and the first elastic member 81 are arranged on the inner side of the dust removal sticky belt 4. The first elastic member 81 is used to drive the pressing plate 82 to slide in the direction towards the axis of the cleaning roller 3. Under the action of the first elastic member 81, the pressing plate 82 is in abutment with the inner side of the inclined position 42 of the dust removal sticky belt 4. The center line of the pressing plate 82 and the axis of the cleaning roller 3 is perpendicular to the pressing plate 82, that is, when the cleaning plate 31 rotates to be opposite to the pressing plate 82, the two are in a parallel state.

[0051] When the cleaning plate 31 rotates to the inclined position 42, the elastic element 81 drives the pressing plate 82 to abut against the inclined position 42 of the dust removal tape 4, and also drives the dust removal tape 4 to abut against the cleaning plate 31. Since the cleaning plate 31 and the pressing plate 82 are in a parallel state at this time, the contact area between the dust removal tape 4 and the cleaning plate 31 is increased under the action of the pressing plate 82, thereby improving the cleaning effect on the cleaning plate 31. There are two sets of elastic elements 81 and pressing plates 82, and the two sets of pressing plates 82 are correspondingly set with the two inclined positions 42 on the dust removal tape 4 to assist in cleaning the two cleaning rollers 3 at the same time.

[0052] Reference Figure 6 , Figure 7 A mounting plate 32 is provided at the end of the cleaning roller 3. The mounting plate 32 is coaxially arranged with the cleaning roller 3. A plurality of protrusions 321 are arranged circumferentially on the mounting plate 32. The plurality of protrusions 321 correspond one-to-one with a plurality of cleaning plates 31, and the protrusions 321 are located between two adjacent cleaning plates 31. The end of the pressing plate 82 extends to the outside of the dust removal adhesive tape 4 and corresponds to the protrusions 321.

[0053] When the cleaning roller 3 rotates, the mounting plate 32 rotates accordingly, simultaneously driving the protrusion 321 to rotate. As the protrusion 321 rotates closer to the pressing plate 82, it engages with the pressing plate 82, causing the pressing plate 82 to move away from the cleaning roller 3. Simultaneously, it compresses the elastic element 81. When the protrusion 321 rotates to the point of separation from the pressing plate 82, the elastic element 81 causes the pressing plate 82 to reset. This achieves the reciprocating movement of the pressing plate 82. As the pressing plate 82 moves towards the cleaning roller 3, it maximizes the contact between the dust removal tape 4 and the cleaning plate 31, improving the cleaning effect of the dust removal tape 4 on the cleaning plate 31.

[0054] Reference Figure 3 Both the pressing plate 82 and the cleaning plate 31 are arranged in a direction parallel to the axis of the cleaning roller 3, and the width of the pressing plate 82 is greater than the width of the cleaning plate 31.

[0055] The width of the pressing plate 82 is set to be greater than the width of the cleaning plate 31. After the pushing component 6 adjusts the position of the cleaning roller 3 up and down, the cleaning plate 31 can abut against the pressing plate 82 when it rotates to the position of the pressing plate 82. At the same time, since the thickness difference of PCBs of different specifications is small, the pushing component 6 will only adjust the cleaning roller 3 within a small range to avoid the cleaning plate 31 moving out of the pressing range of the pressing plate 82 when the cleaning roller 3 moves up and down.

[0056] An mounting sleeve 72 is slidably assembled in the horizontal direction inside the housing 1. Two mounting sleeves 72 are provided corresponding to the upper guide rollers 7, and the upper guide rollers 7 are rotatably connected to the mounting sleeves 72. An elastic element 73 is provided inside the housing 1 and is connected to the mounting sleeves 72 to drive the mounting sleeves 72 to move in a direction away from the other mounting sleeve 72.

[0057] With reference to Figure 2 , Figure 5 , the elastic member 73 drives the two mounting sleeves 72 to move away from each other, and the movement of the mounting sleeves 72 drives the upper guide roller 7 to move, so as to tension the dust removal sticky belt 4. And in the process of reciprocating pressing the dust removal sticky belt 4 by the pressing plate 82, the dust removal sticky belt 4 is always kept in a tensioned state.

[0058] With reference to Figure 3 , Figure 9 , the cleaning roller 3 is a hollow structure, and the eccentric guide rod 9 is coaxially arranged in the cleaning roller 3. The eccentric guide rod 9 is fixedly connected with the output end of the pusher 6. The pusher 6 is arranged at both ends of the cleaning roller 3, and the output ends of the two pushers 6 are rotatably connected with the cleaning roller 3. A motor (not shown in the figure) is arranged on one of the pushers 6 and drives the cleaning roller 3 to rotate. The output end of the other pusher 6 is fixedly connected with the eccentric guide rod 9. In this way, the eccentric guide rod 9 is relatively fixed when the cleaning roller 3 rotates.

[0059] With reference to Figure 3 , the protrusions of the eccentric guide rod 9 are arranged in the direction towards the pressing plate 82. A plurality of top plates 91 are arranged on the cleaning roller 3 in the circumferential direction. The plurality of top plates 91 are arranged in one-to-one correspondence with the plurality of cleaning plates 31. The top plate 91 is located between two adjacent top plates 91, and the top plate 91 slides on the cleaning roller 3 in the direction towards the axis of the cleaning roller 3. A top rod 911 is rotatably arranged on the side of the top plate 91 away from the axis of the cleaning roller 3, and the top rod 911 is parallel to the axis of the cleaning roller 3.

[0060] Initially, the top plate 91 abuts against the side surface of the eccentric guide rod 9, and the top rod 911 corresponds to the edge of the cleaning plate 31. When the cleaning roller 3 rotates, the top plate 91 rotates with it, and at the same time, the top plate 91 rotates relative to the eccentric guide rod 9. When the top plate 91 rotates to the protrusion of the eccentric guide rod 9, the protrusion of the eccentric guide rod 9 drives the top plate 91 to move in the direction towards the pressing plate 82, and in turn drives the top rod 911 to abut against the dust removal sticky belt 4.

[0061] With reference to Figure 3 , the protrusions of the eccentric guide rod 9 and the protrusions 321 correspond to the gaps between the two cleaning plates 31. When the protrusions 321 push the pressing plate 82, the top rod 911 pushes the dust removal sticky belt 4. That is, after the protrusions 321 drive the pressing plate 82 to separate from the dust removal sticky belt 4, the top rod 911 pushes the dust removal sticky belt 4 to drive the dust removal sticky belt 4 to separate from the cleaning plate 31. At this time, the dust removal sticky belt 4 rotates and moves to the next position, so as to clean the cleaning plate 31 again. When the top rod 911 drives the dust removal sticky belt 4 to separate from the cleaning plate 31, only the top rod 911 contacts the dust removal sticky belt 4 at this time, and the top rod 911 is rotatably connected with the top plate 91, so as to reduce the friction of the dust removal sticky belt 4 when it moves, and facilitate the adjustment of the position of the dust removal sticky belt 4.

[0062] Referring to Figure 9 A clamping groove 92 is formed in the eccentric guide rod 9 in the circumferential direction, and a clamping rod 912 is arranged on one side of the top plate 91 close to the eccentric guide rod 9, the clamping rod 912 is clamped in the clamping groove 92, and the clamping rod 912 is arranged in sliding mode in the clamping groove 92. When the top plate 91 rotates, the clamping rod 912 slides in the clamping groove 92, and the clamping rod 912 cooperates with the clamping groove 92 to reduce the disengagement of the top plate 91 and the eccentric guide rod 9, so that the two are stably matched.

[0063] The implementation principle of the present application is that before the PCB is cleaned, the distance between the two groups of conveying plates 21 is adjusted according to the size of the PCB, and the PCB is stably conveyed to the lower side of the cleaning roller 3 by the conveying belt 23. The pushing piece 6 arranged vertically in the shell 1 can adjust the distance between the cleaning roller 3 and the conveying assembly 2 to adapt to PCBs of different thicknesses. When the PCB passes, the cleaning roller 3 rotates, the circumferentially arranged cleaning plate 31 with bristles contacts the PCB, efficiently sweeps the surface of the PCB, and the polygonal cleaning roller 3 edge formed by the cleaning plate 31 can cut into a small gap to improve the cleanliness. At the same time, the closed dust removal sticky belt 4 sleeved on the upper guide roller 7 and the lower guide roller 71 is in abutment with the inclined position 42 of the cleaning roller 3 under the action of the pressing assembly 8, and the impurities on the surface of the cleaning roller 3 are stripped; then the dust blowing pipe 51 blows the impurities off the dust removal sticky belt 4, and the dust suction box 52 synchronously removes the impurities by negative pressure to realize centralized collection, so as to ensure the continuous cleaning of the dust removal sticky belt 4. In addition, the protrusion 321 of the end mounting plate 32 of the cleaning roller 3 cooperates with the pressing plate 82 to drive the pressing plate 82 to reciprocate, thereby enhancing the contact effect of the dust removal sticky belt 4 and the cleaning plate 31. The eccentric guide rod 9 in the cleaning roller 3 cooperates with the top plate 91 and the top rod 911 to push the dust removal sticky belt 4 when the protrusion 321 separates the pressing plate 82, thereby reducing friction and facilitating rotation and updating position. The two groups of cleaning rollers 3 can also repeatedly clean the PCB.

[0064] The overall implementation realizes the adaptive conveying of the PCB, multi-round efficient cleaning, timely removal of impurities, reduces the secondary pollution of the PCB and the replacement frequency of the cleaning roller 3, improves the cleaning efficiency and stability, adapts to different specifications of the PCB, and guarantees the continuous production demand.

[0065] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A PCB board cleaning device, comprising a conveying assembly disposed within a housing for conveying PCB boards, characterized in that, Also includes: The cleaning roller and the dust removal tape are located above the conveying assembly, and the dust removal tape and the side of the cleaning roller abut against each other; The housing also includes a cleaning assembly, which consists of a dust-blowing pipe connected to an air pump and a dust-collecting box connected to a vacuum pump. The dust-blowing pipe and the dust-collecting box are located on the inner and outer sides of the dust-removing adhesive tape, respectively. The dust-blowing pipe and the dust-collecting box have dust-blowing holes and dust-collecting holes on the sides closest to each other, respectively. When the conveying assembly conveys the PCB board through the cleaning roller, the cleaning roller rotates to clean the PCB board. At the same time, the dust-removing adhesive tape rotates synchronously, peeling off and transferring the impurities adhering to the surface of the cleaning roller. Subsequently, the dust-blowing pipe blows away the dust-removing adhesive tape, and the dust-collecting box simultaneously collects the impurities. The dust removal tape is equipped with two horizontally spaced upper guide rollers and a lower guide roller located below the upper guide rollers, so that the part of the dust removal tape between the two upper guide rollers is horizontal and the part between the upper guide roller and the lower guide roller is inclined. The dust blowing pipe and the dust collection box are located on both sides of the horizontal part of the dust removal tape, and the inclined part of the dust removal tape abuts against the side of the cleaning roller. The dust removal tape is equipped with a pressing component, which includes: an elastic element 1 connected to the housing and a pressing plate connected to the elastic element 1. The side of the pressing plate away from the elastic element 1 abuts against the inclined position of the dust removal tape. The elastic element 1 is used to drive the pressing plate to move in the direction of the cleaning roller axis. The line connecting the center of the pressing plate and the cleaning roller axis is perpendicular to the pressing plate. A mounting plate is coaxially mounted at the end of the cleaning roller. Multiple protrusions are arranged circumferentially on the mounting plate. The protrusions correspond to the gaps between two adjacent cleaning plates. The end of the pressing plate extends to the outside of the dust removal tape and corresponds to the protrusions. When the cleaning roller drives the protrusions to rotate to the pressing plate, the protrusions cooperate with the pressing plate, driving the pressing plate to move away from the cleaning roller. While the pressing plate moves, it compresses the elastic element.

2. The PCB board cleaning device according to claim 1, characterized in that, A pusher is provided inside the housing. The output end of the pusher is connected to the cleaning roller to drive the cleaning roller to move up and down. The cleaning roller includes multiple circumferentially arranged cleaning plates. The line connecting the center of the cleaning plate and the axis of the cleaning roller is perpendicular to the cleaning plate.

3. The PCB board cleaning device according to claim 1, characterized in that, The cleaning roller has a hollow structure, and an eccentric guide rod is coaxially arranged inside the cleaning roller. The eccentric guide rod is fixedly connected to the output end of the pusher. The protrusion of the eccentric guide rod is arranged in the direction towards the pressing plate. Multiple top plates are arranged circumferentially on the cleaning roller. The top plate is located between two adjacent cleaning plates and slides in the direction towards the axis of the cleaning roller. A top rod is rotatably arranged on the side of the top plate away from the cleaning roller. When the top plate rotates with the cleaning roller to the protrusion of the eccentric guide rod, the protrusion of the eccentric guide rod drives the top rod to move in the direction towards the pressing plate, so that the top rod abuts against the dust removal tape.

4. The PCB board cleaning device according to claim 3, characterized in that, An mounting sleeve is horizontally slidably assembled inside the housing. The end of the upper guide roller is rotatably engaged with the mounting sleeve. An elastic element two is provided inside the housing and connected to the mounting sleeve. The elastic element two is used to drive the upper guide roller to move away from the other upper guide roller.

5. The PCB board cleaning device according to claim 3, characterized in that, The eccentric guide rod has a groove in the circumferential direction, and a locking rod is provided on the side of the top plate near the eccentric guide rod. The locking rod is locked in the groove, and the locking rod and the groove slide together.

6. The PCB board cleaning device according to claim 1, characterized in that, The lower guide roller is positioned in the middle of the two upper guide rollers. There are two sets of cleaning rollers. The lower guide roller is located between the two cleaning rollers. The two inclined positions on the dust removal tape abut against the sides of the two cleaning rollers respectively.

7. The PCB board cleaning device according to claim 1, characterized in that, Both the pressing plate and the cleaning plate are arranged in a direction parallel to the axis of the cleaning roller, and the width of the pressing plate is greater than the width of the cleaning plate.

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