Circuit board turnover device and automatic production line

Abstract

The utility model relates to the technical field of circuit board production equipment, in particular to a circuit board turnover device and an automatic production line, the circuit board turnover device comprises a machine base, a rotating support and two conveying mechanisms, the machine base is provided with two opposite vertical plates, and the upper ends of the vertical plates are provided with bearing seats; supporting shafts are arranged at the two ends of the rotating support respectively and supported on bearing seats, and the rotating support is connected with a first driving piece. The two conveying mechanisms are symmetrically distributed at the two ends of the rotating support, each conveying mechanism comprises a shell, a panel, two adjustable roller sets and a plurality of conveying roller sets, and the two adjustable roller sets and the conveying roller sets are all installed on the panel and arranged in a row in the length direction of the panel. The two conveying mechanisms are driven by the rotating support to rotate by 180 degrees, so that the circuit board is overturned, and the production efficiency is improved. And the two adjustable rollers of the adjustable roller group can clamp the circuit board, so that the circuit board is prevented from shifting and falling off in the overturning process, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board production equipment, and particularly relates to a circuit board turnover device and an automatic production line. Background Art

[0002] In the related art, with the rapid development of the printed circuit board (PCB) manufacturing industry, the production speed and precision requirements of printed circuit boards are getting higher and higher. The production process of some circuit boards includes the plugging hole process on both sides and the screen printing process on both sides, which requires manual or mechanical hands to turn the circuit board multiple times, and the circuit board needs to be repositioned, resulting in time-consuming and low production efficiency, which needs to be improved. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a circuit board turnover device, which can realize the turnover of the circuit board, cooperate with a plugging hole machine and a screen printing machine to form an automatic production line, and improve the production efficiency.

[0004] The utility model also provides an automatic production line applying the above circuit board turnover device.

[0005] According to the circuit board turnover device of the first aspect embodiment of the utility model, it includes a machine base, a rotating bracket and two conveying mechanisms. The machine base is provided with two opposite vertical plates, and the upper ends of the vertical plates are provided with bearing seats; both ends of the rotating bracket are respectively provided with support shafts, the support shafts are supported on the bearing seats, and the rotating bracket is connected with a first driving member; the two conveying mechanisms are symmetrically distributed at both ends of the rotating bracket. The conveying mechanism includes a housing, a panel, two adjustable roller groups and a plurality of conveying roller groups. An installation cavity with an opening is formed inside the housing. The panel is connected to the side of the housing and covers the opening of the installation cavity. The two adjustable roller groups and the plurality of conveying roller groups are all installed on the panel and are arranged in a row along the length direction of the panel. The two adjustable roller groups are located at both ends of the plurality of conveying roller groups; wherein, each adjustable roller group includes two adjustable rollers, the adjustable rollers are connected with adjustable shafts, and the adjustable rollers can rotate freely relative to the adjustable shafts. The panel is provided with adjustable seats, the adjustable shafts are installed on the adjustable seats through alignment bearings, and the adjustable seats are connected with a second driving member. The output end of the second driving member is hinged with two pull rods, and the other ends of the two pull rods are respectively hinged to one adjustable shaft; each conveying roller group includes two conveying rollers, and the conveying rollers are connected with a third driving member.

[0006] According to the circuit board flipping device of the first embodiment of the utility model, there are at least the following beneficial effects: the circuit board flipping device can transport the circuit board by arranging two adjustable roller groups and multiple conveying roller groups of two conveying mechanisms in a row, and the two conveying mechanisms are driven to rotate 180° by the rotating bracket to realize the flipping of the circuit board, and then handed over to other equipment. It can be applied to an automated production line to replace manual flipping and positioning of the circuit board, thereby improving production efficiency. In order to fix the circuit board during the flipping process, the two adjustable rollers of the adjustable roller group are supported by self-aligning bearings, and the angle can be adjusted. The two pull rods are driven by the second driving member to push the adjustable shaft to deflect, so that the two adjustable rollers move toward each other and clamp the circuit board. During the flipping process, the circuit board is prevented from shifting and falling off, thereby improving reliability.

[0007] According to some embodiments of the first aspect of the utility model, the second driving member is an electric push rod, a rotating pin is provided at the end of the output rod of the electric push rod, and the two pull rods are hinged to the rotating pin.

[0008] According to some embodiments of the first aspect of the utility model, a radially protruding convex ring is provided on the outer wall of the adjustable roller, the convex ring contacts the circuit board, and the side surface of the convex ring contacting the circuit board is an arc surface.

[0009] According to some embodiments of the first aspect of the utility model, the panel is provided with a circular hole for the adjustable shaft to pass through, both ends of the side walls of the circular hole are provided with chamfers, and the diameter of the circular hole is larger than the diameter of the adjustable shaft.

[0010] According to some embodiments of the first aspect of the utility model, the distance between the two conveying rollers of each conveying roller group is greater than the thickness of the circuit board, and the third driving member includes a motor and a synchronous belt, the motor is used to drive the synchronous belt, and the rotating shaft of the conveying roller is connected to a gear, and the gear is meshed with the synchronous belt.

[0011] According to some embodiments of the first aspect of the utility model, the rotating bracket includes two beams, both ends of the two beams are fixed by side plates, the support shaft is arranged on the side of the side plate away from the beams, and the two conveying mechanisms are distributed between the two beams.

[0012] According to some embodiments of the first aspect of the utility model, the base is connected to a brake mechanism, which includes a brake sleeve and a brake pressure plate, the brake sleeve is annular and is sleeved on the outside of the support shaft, the brake sleeve is provided with a radially arranged slide groove, the brake pressure plate is slidably arranged in the slide groove, the side of the brake pressure plate facing the support shaft is provided to match the arc surface of the support shaft, the side of the brake pressure plate away from the support shaft is connected to a fourth driving member, the base is provided with an angle detection component to detect the rotation angle of the support shaft, the base has a controller, and the angle detection component and the fourth driving member are electrically connected to the controller.

[0013] According to some embodiments of the first aspect of the utility model, the fourth driving member is an electromagnet, the outer wall of the brake sleeve is provided with a magnetic attraction portion, and the electromagnet and the magnetic attraction portion are arranged adjacent to each other.

[0014] According to the automated production line of the second embodiment of the utility model, it includes a loading device, a first plugging machine, the circuit board flipping device described in the first embodiment, a second plugging machine, a first screen printing machine, the circuit board flipping device described in the first embodiment and a second screen printing machine arranged in sequence.

[0015] According to some embodiments of the second aspect of the utility model, opposite sides of the second plugging machine and the circuit board turning device are provided with through-beam photoelectric sensors, the second plugging machine is provided with a second conveyor belt, the second conveyor belt is connected to a second lifting seat, and the second lifting seat is electrically connected to the through-beam photoelectric sensor; opposite sides of the second screen printing machine and the circuit board turning device are provided with through-beam photoelectric sensors, the second screen printing machine is provided with a third conveyor belt, the third conveyor belt is connected to a third lifting seat, and the third lifting seat is electrically connected to the through-beam photoelectric sensor.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a structural schematic diagram of a circuit board flipping device according to an embodiment of the first aspect of the utility model;

[0019] Figure 2 This is an exploded schematic diagram of a circuit board flipping device according to an embodiment of the first aspect of the utility model;

[0020] Figure 3It is a cross-sectional view of the adjustable roller group part in the first aspect embodiment of the present utility model;

[0021] Figure 4 It is a schematic structural diagram of the braking mechanism in the first aspect embodiment of the present utility model;

[0022] Figure 5 It is a cross-sectional view of the braking mechanism in the first aspect embodiment of the present utility model.

[0023] Figure 6 It is a schematic structural diagram of the automatic production line in the second aspect embodiment of the present utility model;

[0024] The attached drawing reference numerals are as follows:

[0025] Machine base 100, vertical plate 110, bearing seat 120;

[0026] Rotating bracket 200, support shaft 210, cross beam 220, side plate 230;

[0027] Conveying mechanism 300, housing 310, installation cavity 311, panel 320, adjustable seat 321, aligning bearing 322, adjustable roller group 330, adjustable roller 331, convex ring 3311, adjustable shaft 332, second driving member 333, pull rod 334, conveying roller group 340, conveying roller 341;

[0028] Braking mechanism 400, brake sleeve 410, chute 411, brake pressing plate 420, fourth driving member 430;

[0029] Feeding device 510, first plug hole machine 520, second plug hole machine 530, second conveyor belt 531, first screen printing machine 540, second screen printing machine 550, third conveyor belt 551. Detailed implementation manners

[0030] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0031] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, if the first and the second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0033] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" shall be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0034] Referring to Figures 1 to 5 , an embodiment of the first aspect of the present utility model provides a circuit board flipping device, which includes a machine base 100, a rotating bracket 200, and two conveying mechanisms 300. The machine base 100 is the foundation of the circuit board flipping device and is usually fixed on the ground of a factory or other equipment. At each end of the machine base 100, there is a vertical plate 110. The two vertical plates 110 are arranged oppositely. At the upper end of the vertical plate 110, there is a bearing seat 120. At each end of the rotating bracket 200, there is a support shaft 210. The support shaft 210 is supported by the bearing in the bearing seat 120. Various bearings such as ball bearings and roller bearings can be selected. The rotating bracket 200 is connected with a first driving member. The function of the first driving member is to drive the rotating bracket 200 to rotate. The first driving member can be installed inside the bearing seat 120. For example, the first driving member adopts a motor and a reduction gearbox, and the rotating shaft of the motor is connected to the support shaft 210 through the reduction gearbox.

[0035] Both of the two conveying mechanisms 300 are installed on the rotating bracket 200 and are symmetrically distributed at both ends of the rotating bracket 200, corresponding to both sides of the width of the circuit board. The conveying mechanism 300 includes a housing 310, a panel 320, two adjustable roller groups 330, and multiple conveying roller groups 340. An installation cavity 311 with an opening is formed inside the housing 310. The panel 320 is connected to the side of the housing 310 and covers the opening of the installation cavity 311. Both the two adjustable roller groups 330 and the multiple conveying roller groups 340 are installed on the panel 320 and are arranged in a row along the length direction of the panel 320 to match the shape of the circuit board. The two adjustable roller groups 330 are located at both ends of the multiple conveying roller groups 340. The function of the multiple conveying roller groups 340 is to drive the circuit board to move.

[0036] Among them, the adjustable roller group 330 includes two adjustable rollers 331. The adjustable rollers 331 are connected to the adjustable shaft 332 and can rotate freely relative to the adjustable shaft 332. The panel 320 is provided with an adjustable seat 321. The adjustable shaft 332 is installed on the adjustable seat 321 through a spherical roller bearing 322. A second driving member 333 is connected to the adjustable seat 321. The output end of the second driving member 333 is hinged with two pull rods 334. The other ends of the two pull rods 334 are respectively hinged with an adjustable shaft 332. The two pull rods 334 are in a V shape. When the second driving member 333 pushes the two pull rods 334, the two adjustable shafts 332 can be driven to deflect; the conveying roller group 340 includes two conveying rollers 341. The conveying rollers 341 are connected with a third driving member, and the third driving member drives the conveying rollers 341 to rotate, thereby driving the circuit board to move and realizing conveying.

[0037] When the circuit board flipping device is operating, the two adjustable roller groups 330 and multiple conveying roller groups 340 of the two conveying mechanisms 300 of the circuit board flipping device are arranged in a row. The two sides of the circuit board are respectively connected to a conveying mechanism 300, so that the circuit board can be conveyed. By driving the two conveying mechanisms 300 to rotate 180° through the rotating bracket 200, the flipping of the circuit board can be realized, and the position of the circuit board remains unchanged, eliminating the trouble of repositioning and it can be directly conveyed to the next production equipment. The circuit board flipping device can be applied to an automated production line, replacing manual flipping and positioning of the circuit board and improving production efficiency.

[0038] In order to fix the circuit board during the flipping process, the two adjustable rollers 331 of the adjustable roller group 330 are supported by the spherical roller bearing 322 and can adjust the angle. By driving the two pull rods 334 to move forward through the second driving member 333, the included angle between the two pull rods 334 increases, thereby driving the two adjustable shafts 332 to deflect, so that the two adjustable rollers 331 of the adjustable roller group 330 move towards each other and clamp the circuit board, preventing the circuit board from shifting and falling off during the flipping process and improving reliability. After the flipping is completed, by driving the two pull rods 334 to move backward through the second driving member 333, the adjustable shafts 332 return to their original positions, and the adjustable rollers 331 return to the horizontal state to support the circuit board, and the height of the adjustable rollers 331 is the same as the height of the corresponding conveying rollers 341. It can be understood that the adjustable rollers 331 can rotate freely around the adjustable shaft 332, and when the circuit board moves, the adjustable rollers 331 rotate passively.

[0039] It can be understood that the distance between the two conveying rollers 341 of each conveying roller group 340 is greater than the thickness of the circuit board. During the conveying process, only the conveying roller 341 below each conveying roller group 340 contacts the circuit board. The third driving member can adopt a motor and a synchronous belt. The motor drives the synchronous belt, and the rotating shaft of the conveying roller 341 is connected with a gear, and the gear meshes with the synchronous belt, and the synchronous belt drives the conveying rollers 341 below multiple conveying roller groups 340 to rotate synchronously, so as to convey the circuit board. In addition, the third driving member can adopt a motor and a driving gear, the rotating shaft of the conveying roller 341 is connected with a gear, and the gear meshes with the driving gear. Through the transmission of multiple driving gears, the conveying rollers 341 below multiple conveying roller groups 340 are synchronously driven to rotate, which can also meet the requirement of conveying the circuit board.

[0040] In some embodiments of the first aspect of the present invention, the second driving member 333 is an electric push rod, and a rotating pin is provided at the end of the output rod of the electric push rod, and the two pull rods 334 are hinged to the rotating pin. The two pull rods 334 are driven by the electric push rod, and the moving distance is stable and controllable, and the deflection angle of the adjustable shaft 332 is accurately limited, so that the two adjustable rollers 331 clamp the circuit board. Of course, the second driving member 333 can also adopt other structures, such as a cylinder, a motor driving a linear module, etc.

[0041] Refer to Figure 3 , in some embodiments of the first aspect of the present invention, a radially protruding convex ring 3311 is provided on the outer wall of the adjustable roller 331. During the flipping process, the convex ring 3311 contacts and clamps the circuit board, and the side surface of the convex ring 3311 contacting the circuit board is designed as an arc surface, which reduces the frictional resistance during the process of conveying the circuit board. The adjustable roller 331 is usually made of rubber material and has a slight elasticity. When clamping the circuit board, the adjustable roller 331 will be slightly deformed, which helps to clamp and prevent the circuit board from shifting.

[0042] It can be understood that as Figure 4 shown, in some embodiments of the first aspect of the present invention, a plurality of round holes are provided on the panel 320, and the adjustable shaft 332 passes through the round holes, and chamfers are provided at both ends of the side wall of the round hole, and the diameter of the round hole is greater than the diameter of the adjustable shaft 332. When the pull rod 334 moves and pushes the two adjustable rollers 331 of the adjustable roller group 330 to move towards each other to clamp the circuit board, the adjustable shaft 332 can deflect a certain angle in the round hole to prevent interference. Of course, the diameter of the round hole can also be directly set to a larger size, and the gap between the adjustable shaft 332 and the inner wall of the round hole is larger to meet the requirement of the deflection of the adjustable shaft 332.

[0043] Refer to Figure 1 and Figure 2, the rotating bracket 200 includes two cross beams 220. The two ends of the two cross beams 220 are fixed by side plates 230 to form a frame structure, which is stable in structure and has strong anti-deformation ability. The support shaft 210 is arranged on the side of the side plate 230 facing away from the cross beam 220. The two conveying mechanisms 300 are distributed between the two cross beams 220. The two cross beams 220 are used to clamp the two conveying mechanisms 300, with a stable structure, which helps to prevent the deformation of the rotating bracket 200 and the displacement of the conveying mechanism 300, and improves the stability and accuracy of conveying.

[0044] It can be understood that since each flip requires the rotating bracket 200 to rotate 180° with the two conveying mechanisms 300 and the circuit board, if the flipping angle is inaccurate, problems such as bumping and jamming may occur during the transfer of the circuit board. Considering from the perspective of production efficiency, the faster the rotation speed, the better. However, after rapid rotation, the stopping position is prone to errors and a balance needs to be achieved. For this reason, in some embodiments of the first aspect of the present invention, the machine base 100 is connected with a braking mechanism 400. The braking mechanism 400 includes a brake sleeve 410 and a brake pressure plate 420. The brake sleeve 410 is annular and sleeved outside the support shaft 210. The brake sleeve 410 can be fixed on the side of the vertical plate 110 or the bearing seat 120. The brake sleeve 410 is provided with a radially arranged chute 411. The brake pressure plate 420 is slidably arranged in the chute 411. The side of the brake pressure plate 420 facing the support shaft 210 is set as an arc surface matching the support shaft 210. The side of the brake pressure plate 420 facing away from the support shaft 210 is connected with a fourth driving member 430. An angle detection component is also arranged on the machine base 100 to detect the rotation angle of the support shaft 210. The machine base 100 has a controller, and the angle detection component and the fourth driving member are electrically connected to the controller. During the rotation of the circuit board, when rotating to a specific angle (such as 120 degrees), the angle detection component sends a detection signal to the controller, and the controller controls the fourth driving member to start, so that the brake pressure plate 420 moves towards the support shaft 210 and contacts the support shaft 210 to perform braking, thereby helping the rotating bracket 200 to stop, accurately rotate 180°, and reduce the time-consuming of the circuit board flip, helping to improve production efficiency.

[0045] It can be understood that, in some embodiments of the first aspect of the present invention, the fourth driving member 430 adopts an electromagnet. A magnetic attraction part is arranged on the outer wall of the brake sleeve 410. The electromagnet and the magnetic attraction part are arranged adjacent to each other. When the electromagnet is energized to generate magnetic attraction, the electromagnet attracts the magnetic attraction part, thereby driving the brake pressure plate 420 to move towards the support shaft 210. By controlling the current input to the electromagnet, the magnitude of the magnetic attraction can be controlled, and further the magnitude of the braking force can be controlled. In addition, the fourth driving member 430 can also adopt structures such as an electric push rod and a cylinder, which can also meet the requirement of driving the brake pressure plate 420.

[0046] It can be understood that the angle detection component can adopt a trigger type travel switch or a photoelectric switch, and only need to install a trigger component on the surface of the support shaft 210. When the support shaft 210 rotates to a specific angle, it will be detected by the angle detection component. It should be understood that the rotating bracket 200 rotates reciprocally instead of continuously rotating in a single direction. Because the second driving part 333 and the third driving part used by the conveying mechanism 300 need to connect the circuit or the air circuit, continuous unidirectional rotation is not conducive to wiring, and using a rotary joint will result in a higher cost. Therefore, the method of the rotating bracket 200 rotating reciprocally is a better solution.

[0047] It can be understood that the magnetic suction force generated by the electromagnet includes a first increasing interval, a first decreasing interval, a second increasing interval, a first decreasing interval, and a maintaining stable pressure interval. The magnetic suction force rapidly increases in the first increasing interval, causing the driving brake pressing plate 420 to rapidly move towards the support shaft 210 and contact the support shaft 210, and reaching the maximum magnetic suction force after passing through the first increasing interval. The magnetic suction force gradually decreases in the first decreasing interval, gradually reducing the frictional force during the deceleration process, and the deceleration acceleration gradually decreases. The magnetic suction force gradually increases in the second increasing interval, gradually increasing the frictional force during the deceleration process, where the maximum frictional force reached is less than the maximum frictional force that can be achieved in the first increasing interval, and the deceleration acceleration gradually increases. Then the magnetic suction force gradually decreases again in the first decreasing interval, gradually reducing the frictional force during the deceleration process, and the deceleration acceleration gradually decreases. Finally, in the maintaining stable pressure interval, the magnetic suction force is maintained at a stable pressure (within a deviation of 3%) until the rotating bracket 200 stops rotating.

[0048] The change curve of the magnetic suction force in the first increasing interval satisfies: , where X is the time axis and Y is the magnetic suction force axis. The increasing process of the magnetic suction force has an increasing acceleration. When the brake pressing plate 420 contacts the support shaft 210, the frictional force is small and then gradually increases, preventing the resistance from being too large at the first moment when the brake pressing plate 420 contacts the support shaft 210 and avoiding problems such as the motor of the first driving part being blocked or burned out. The change curve of the magnetic suction force in the first decreasing interval satisfies: , the acceleration remains unchanged during the decreasing process of the magnetic suction force, and the frictional force exerted by the brake pressing plate 420 on the support shaft 210 decreases smoothly; the change curve of the magnetic suction force in the second increasing interval satisfies: , the increasing process of the magnetic suction force has an increasing acceleration, but compared with the first increasing interval, the acceleration during the increasing process of the magnetic suction force is smaller, and the change of the frictional force exerted by the brake pressing plate 420 on the support shaft 210 is slower; the change curve of the magnetic suction force in the second decreasing interval satisfies: , during the process of the decrease in magnetic suction force, the acceleration gradually decreases, and the decreasing amplitude of the frictional force exerted by the brake pressing plate 420 on the support shaft 210 becomes smaller and smaller. Eventually, a stable pressure (within a deviation of 3%) is maintained in the stable pressure range, causing the rotating bracket 200 to stop rotating, which is beneficial to accelerating the stopping speed, reducing time, and improving production efficiency.

[0049] In the second aspect of the embodiments of the present invention, an automated production line is proposed. The automated production line includes a feeding device 510, a first plug hole machine 520, a circuit board flipping device, a second plug hole machine 530, a first screen printing machine 540, a circuit board flipping device, and a second screen printing machine 550 arranged in sequence, where the circuit board flipping device is the circuit board flipping device proposed in the first aspect of the embodiments. During the production process of the circuit board, the feeding device 510 feeds the circuit board into the first plug hole machine 520. The first plug hole machine 520 completes the plugging of one side of the circuit board. Then the circuit board is transported to the first circuit board flipping device for flipping, and then the circuit board is fed into the second plug hole machine 530 to complete the plugging of the other side. The circuit board is fed into the first screen printing machine 540 for screen printing on one side, and then the circuit board is transported to the second circuit board flipping device for flipping. Finally, the circuit board is fed into the second screen printing machine 550 to complete the screen printing on the other side. Subsequently, the circuit board can be unloaded or fed into other equipment.

[0050] In some embodiments of the second aspect of the present invention, a transmissive photoelectric sensor is provided on the opposite sides of the second plug hole machine 530 and the circuit board flipping device. The second plug hole machine 530 is provided with a second conveyor belt 531. The second conveyor belt 531 is connected to the second lifting seat, and the second lifting seat is electrically connected to the transmissive photoelectric sensor. The transmissive photoelectric sensor includes a transmitting end and a receiving end. The transmitting end is connected to the second lifting seat, and the receiving end is fixed to the machine base 100 of the circuit board flipping device. By using the transmissive photoelectric sensor to detect whether the heights of the second plug hole machine 530 and the circuit board flipping device correspond, if the heights do not correspond, the height of the second conveyor belt 531 is adjusted through the second lifting seat, and at the same time, the height of the transmitting end is adjusted until the heights of the transmitting end and the receiving end of the transmissive photoelectric sensor are the same, and the heights of the second plug hole machine 530 and the circuit board flipping device correspond, so as to successfully complete the transportation and handover of the circuit board and prevent bumps or the circuit board from getting stuck.

[0051] Similarly, a transmissive photoelectric sensor is provided on the opposite side of the second screen printer 550 and the circuit board flipping device. The second screen printer 550 is provided with a third conveyor belt 551. The third conveyor belt 551 is connected to the third lifting seat. The third lifting seat is electrically connected to the transmissive photoelectric sensor. The transmissive photoelectric sensor includes a transmitting end and a receiving end. The transmitting end is connected to the third lifting seat, and the receiving end is fixed to the machine base 100 of the circuit board flipping device. The height of the second screen printer 550 and the circuit board flipping device is detected by the transmissive photoelectric sensor. If the heights do not correspond, the height of the third conveyor belt 551 is adjusted through the third lifting seat, and at the same time, the height of the transmitting end is adjusted until the heights of the transmitting end and the receiving end of the transmissive photoelectric sensor are the same, and the heights of the second screen printer 550 and the circuit board flipping device correspond, so as to successfully complete the conveying and handover of the circuit board and prevent bumping or jamming of the circuit board.

[0052] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A circuit board turning device, characterized in that: include: A machine base, wherein the machine base is provided with two opposite vertical plates, and a bearing seat is provided at the upper end of the vertical plates; A rotating bracket, wherein two ends of the rotating bracket are respectively provided with support shafts, the support shafts are supported by the bearing seat, and the rotating bracket is connected to a first driving member; Two conveying mechanisms are connected to the rotating bracket, and the two conveying mechanisms are symmetrically distributed at both ends of the rotating bracket. The conveying mechanism includes a shell, a panel, two adjustable roller groups and a plurality of conveying roller groups. The shell forms an installation cavity with an opening inside, and the panel is connected to the side of the shell and covers the opening of the installation cavity. The two adjustable roller groups and the plurality of conveying roller groups are installed on the panel and arranged in a row along the length direction of the panel. The two adjustable roller groups are located at both ends of the plurality of conveying roller groups. Among them, the adjustable roller group includes two adjustable rollers, the adjustable rollers are connected to an adjustable shaft, and the adjustable rollers can rotate freely relative to the adjustable shaft, the panel is provided with an adjustable seat, the adjustable shaft is installed on the adjustable seat through a self-aligning bearing, and the adjustable seat is connected to a second driving member, the output end of the second driving member is hinged to two pull rods, and the other ends of the two pull rods are respectively hinged to one of the adjustable shafts; the conveying roller group includes two conveying rollers, and the conveying rollers are connected to a third driving member.

2. The circuit board turning device according to claim 1, characterized in that: The second driving member is an electric push rod, and a rotating pin is arranged at the end of the output rod of the electric push rod, and the two pull rods are hinged to the rotating pin.

3. The circuit board turning device according to claim 1, characterized in that: A radially protruding convex ring is arranged on the outer wall of the adjustable roller, the convex ring contacts the circuit board, and the side surface of the convex ring contacting the circuit board is an arc surface.

4. The circuit board turning device according to claim 1, characterized in that: The panel is provided with a circular hole for the adjustable shaft to pass through, both ends of the side wall of the circular hole are provided with chamfers, and the diameter of the circular hole is larger than the diameter of the adjustable shaft.

5. The circuit board turning device according to claim 1, characterized in that: The distance between the two conveying rollers of each conveying roller group is greater than the thickness of the circuit board. The third driving member includes a motor and a synchronous belt. The motor is used to drive the synchronous belt. The rotating shaft of the conveying roller is connected to a gear, and the gear is meshed with the synchronous belt.

6. The circuit board turning device according to claim 1, characterized in that: The rotating bracket includes two cross beams, both ends of the two cross beams are fixed by side plates, the support shaft is arranged on the side of the side plate away from the cross beam, and the two conveying mechanisms are distributed between the two cross beams.

7. The circuit board turning device according to claim 1, characterized in that: The base is connected to a brake mechanism, which includes a brake sleeve and a brake pressure plate. The brake sleeve is annular and is sleeved on the outside of the support shaft. The brake sleeve is provided with a radially arranged slide groove, and the brake pressure plate is slidably arranged in the slide groove. The side of the brake pressure plate facing the support shaft is arranged to match the arc surface of the support shaft, and the side of the brake pressure plate away from the support shaft is connected to a fourth driving member. The base is provided with an angle detection component to detect the rotation angle of the support shaft. The base has a controller, and the angle detection component and the fourth driving member are electrically connected to the controller.

8. The circuit board turning device according to claim 7, characterized in that: The fourth driving member is an electromagnet, the outer wall of the brake sleeve is provided with a magnetic attraction portion, and the electromagnet and the magnetic attraction portion are arranged adjacent to each other.

9. Automated production line, characterized in that, The invention comprises a feeding device, a first plugging machine, a circuit board turning device as claimed in any one of claims 1 to 8, a second plugging machine, a first screen printer, a circuit board turning device as claimed in any one of claims 1 to 8 and a second screen printer which are arranged in sequence.

10. The automated production line according to claim 9, characterized in that: Opposite-beam photoelectric sensors are arranged on opposite sides of the second plugging machine and the circuit board turning device, and the second plugging machine is provided with a second conveyor belt, the second conveyor belt is connected to a second lifting seat, and the second lifting seat is electrically connected to the opposite-beam photoelectric sensor; opposite sides of the second screen printing machine and the circuit board turning device are provided with an opposite-beam photoelectric sensor, and the second screen printing machine is provided with a third conveyor belt, the third conveyor belt is connected to a third lifting seat, and the third lifting seat is electrically connected to the opposite-beam photoelectric sensor.

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