A PCB board detection device

Abstract

The present application relates to the field of PCB board detection, and specifically discloses a PCB board detection device, comprising an upper cover shell and a lower cover shell symmetrically arranged on the upper and lower sides of the PCB board, a light-emitting unit installed in the upper cover shell, and a photosensitive sensor installed in the lower cover shell. The present application can respectively form darkrooms on the upper and lower sides of the PCB board by arranging the upper cover shell and the lower cover shell on the upper and lower sides of the PCB board, and cooperates with installing the light-emitting unit in the upper cover shell to illuminate the PCB board in the upper darkroom, and installing the photosensitive sensor in the lower cover shell to detect whether there are light-transmitting gaps in the pin holes at the bottom of the PCB board, so as to determine whether the pins of the components are firmly welded to the pin holes on the PCB board, without the need for human visual observation by the staff, which is convenient and efficient, and to a certain extent improves the efficiency and accuracy of the detection of the soldering firmness of the pins of the PCB board.

Description

Technical Field

[0001] The present application relates to the field of PCB board detection, and in particular to a PCB board detection device. Background Art

[0002] PCB board, also known as circuit board, is a carrier for the integration of electronic components and is widely used in today's electrical equipment. After the production of PCB board is completed, various tests are usually carried out. Among them, the test of the firmness of the pin welding of components on the PCB board is particularly important. If the pin welding of components on the PCB board is not firm, the components on the PCB board are easy to loosen and break during the later use, affecting its service life.

[0003] In the prior art, due to the lack of relevant equipment, direct observation by the human eye is usually used to detect the firmness of the soldering of component pins on the PCB board. However, the pins of components on the PCB board are usually relatively small, which makes it inconvenient for the human eye to observe and detect. The human eye is prone to fatigue and errors are prone to occur during long-term observation, which affects the convenience and accuracy of the detection.

[0004] Therefore, a PCB board detection device is proposed to solve some problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present application is to improve the convenience and accuracy of the detection of the soldering firmness of the pins on the PCB board. Compared with the prior art, a PCB board detection device is provided, including a machine base, a first conveying assembly is installed on the top of the machine base, and the top of the first conveying assembly is used to convey the PCB board, a detection assembly is installed on the first conveying assembly, and the detection assembly includes a door frame fixedly installed on the top of the machine base and sleeved on the outside of the first conveying assembly, an upper cover shell and a lower cover shell symmetrically arranged on the upper and lower sides of the PCB board are arranged in the door frame, a light-emitting unit is installed in the upper cover shell, a photosensitive sensor is installed in the lower cover shell, and a lifting assembly for controlling the relative up and down movement of the upper cover shell and the lower cover shell is installed on the door frame.

[0006] Furthermore, rubber pads are fixed around the bottom edge of the upper cover shell and the top edge of the lower cover shell.

[0007] Furthermore, the lifting assembly includes a first electric push rod vertically inverted on the top of the door frame, and the telescopic end below the first electric push rod is fixedly connected to the top of the upper cover shell, and gears located in the middle position of the upper cover shell and the lower cover shell are rotatably installed on both sides of the door frame, a first gear rod meshing with one side of the gear is vertically fixed on the upper cover shell, and a second gear rod meshing with the other side of the gear is vertically fixed on the lower cover shell.

[0008] Furthermore, a plurality of connecting ropes are connected inside the upper cover shell, and rubber balls are fixedly installed at the ends of the connecting ropes.

[0009] Furthermore, the top of the upper cover shell is configured as a through-shaped structure, an air pump is installed in the base, and the air pump is connected to the bottom of the upper cover shell, a horizontally arranged movable plate is slidably installed in the upper cover shell, and the outer size of the movable plate is adapted to the inner size of the upper cover shell, the upper end of the connecting rope is fixedly connected to the bottom of the movable plate, and a spring elastically supported at the bottom of the movable plate is fixedly installed in the upper cover shell.

[0010] Furthermore, an outer cylinder vertically arranged below the lower cover shell is installed on the top of the machine base, and an inner cylinder vertically connected to the bottom of the lower cover shell is slidably installed in the outer cylinder, and the bottom end of the outer cylinder is connected to the air pump.

[0011] Furthermore, a vertically arranged column tube is installed on the top of the door frame, and a valve stem is slidably inserted inside the column tube. After the bottom end of the valve stem movably passes through the upper cover shell and the movable plate, it is fixedly connected to the top of the light-emitting unit. The top end of the column tube is connected to the air pump, and solenoid valves are installed in the bottom end of the outer tube and the top end of the column tube.

[0012] Furthermore, a second conveying assembly vertically arranged with respect to the first conveying assembly is installed in the machine base, an L-shaped frame is installed on the top of the machine base, and a camera arranged above the first conveying assembly is fixedly installed on the L-shaped frame, and a slot arranged between the first conveying assembly and the lifting assembly is opened on the top of the machine base, and a grabbing assembly is installed in the slot.

[0013] Furthermore, the grabbing assembly includes an axle seat fixedly installed in the slot, and a rotating shaft is rotatably installed in the axle seat, a second electric push rod is vertically fixedly installed on the rotating shaft, a first motor connected to the rotating shaft is fixedly installed on the axle seat, a rotating table is rotatably installed on the telescopic end above the second electric push rod, a pneumatic suction cup connected to an air pump is installed on the top of the rotating table, and a second motor connected to the rotating table is fixedly installed on the telescopic end of the second electric push rod.

[0014] Furthermore, a worm gear is coaxially fixed on the rotating shaft and the rotating table, a worm is fixedly mounted on the driving shafts of the first motor and the second motor, and the worm is meshed with the corresponding worm gear.

[0015] Compared with the prior art, the advantages of this application are:

[0016] (1) The present application can form darkrooms on the upper and lower sides of the PCB board by arranging the upper cover and the lower cover on the upper and lower sides of the PCB board, respectively. The light-emitting unit is installed in the upper cover to illuminate the PCB board in the upper darkroom. The photosensitive sensor is installed in the lower cover to detect whether there are light-transmitting gaps in the pin holes at the bottom of the PCB board, so as to determine whether the pins of the components are firmly welded to the pin holes on the PCB board. There is no need for staff to observe with their eyes, which is convenient and efficient, and to a certain extent improves the efficiency and accuracy of the detection of the firmness of the pin welding of the PCB board.

[0017] (2) By arranging the gear in the middle position between the upper cover shell and the lower cover shell, and engaging the first gear rod vertically fixed to the upper cover shell and the second gear rod vertically fixed to the lower cover shell on both sides of the gear respectively, the upper cover shell and the lower cover shell can move synchronously relative to each other. Only a first electric push rod needs to be arranged on one side to realize the simultaneous movement drive of the upper cover shell and the lower cover shell, which is beneficial to reducing the manufacturing and use costs of the device, and can ensure the consistency and stability of the synchronous relative movement of the upper cover shell and the lower cover shell to a certain extent.

[0018] (3) The rubber ball is connected to the bottom of the spring that slides up and down in the upper cover shell by a connecting rope, and the spring is elastically supported by an outer tube. The air pump is used to suck the air in the lower cover shell, so that the rubber ball will automatically cover the bolt holes on the nearby PCB board to seal the bolt holes, thereby preventing the light emitted by the light-emitting unit from entering the darkroom below through the bolt holes during the detection process. This improves the applicability of the device to a certain extent, and the dust on the surface of the PCB board can be cleaned by the suction of the air flow, which is beneficial to ensure the cleanliness of the PCB board after detection.

[0019] (4) By fixing the light-emitting unit at the bottom of the valve stem and sliding the valve stem into the column tube, the air pump is used to perform suction / blowing operations on the top of the column tube, so that the light-emitting unit can be controlled to move up and down in the upper cover shell to adjust its position. By shaking the position of the light-emitting unit, the illumination angle of the light-emitting unit is continuously adjusted during the detection process, which improves the comprehensiveness of light penetrating from different directions through the gaps in the pin holes to the darkroom below to a certain extent, which is conducive to further improving the monitoring accuracy of the device.

[0020] (5) By installing a second electric push rod that can be flipped up and down in the shaft seat, and installing a radially rotatable rotating table on the telescopic end of the second electric push rod, and arranging a pneumatic suction cup on the top of the rotating table, unqualified PCB boards on the first conveying assembly can be grabbed and lowered to the second conveying assembly that is arranged vertically with the first conveying assembly below, without the need for manual sorting by staff, thereby effectively improving the efficiency of the device in separating qualified / unqualified products after PCB board inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present application;

[0022] Figure 2 A three-dimensional diagram of the detection assembly for this application;

[0023] Figure 3 A three-dimensional diagram of the second conveying assembly of the present application;

[0024] Figure 4 A three-dimensional diagram of the grab assembly for this application;

[0025] Figure 5 This is the front view of the application;

[0026] Figure 6 A top view of the present application;

[0027] Figure 7 It is a cross-sectional view of the structure at AA of this application;

[0028] Figure 8 It is a cross-sectional view of the structure at position BB of this application;

[0029] Fig. 9 For this application Figure 8 Schematic diagram of the upper and lower covers being closed on the PCB board;

[0030] Fig.10 This is a cross-sectional view of the structure at CC of this application.

[0031] Description of the numbers in the figure:

[0032] 1. Machine base;

[0033] 2. First conveying assembly; 201. First conveying frame; 202. First conveying wheel; 203. First conveying belt;

[0034] 3. Detection assembly; 301. Door frame; 302. Upper cover shell; 303. Lower cover shell; 304. Light emitting unit; 305. Photosensitive sensor; 306. Rubber pad;

[0035] 4. Lifting assembly; 401. First electric push rod; 402. Gear; 403. First gear rod; 404. Second gear rod;

[0036] 5. Connecting rope; 501. Rubber ball; 502. Movable plate; 503. Spring; 504. Outer tube; 505. Inner tube; 506. Column tube; 507. Valve stem;

[0037] 6. Second conveying assembly; 601. Second conveying frame; 602. Second conveying wheel; 603. Second conveying belt; 604. Card slot;

[0038] 7. L-shaped frame; 701. Camera;

[0039] 8. Grabbing assembly; 801. Shaft seat; 802. Rotating shaft; 803. Second electric push rod; 804. First motor; 805. Rotating table; 806. Pneumatic suction cup; 807. Second motor; 808. Worm gear; 809. Worm. DETAILED DESCRIPTION

[0040] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application.

[0041] Embodiment 1:

[0042] The present invention provides a PCB board detection device, please refer to Figure 1 - Fig.10 , including a base 1, a first conveying component 2 is installed on the top of the base 1, and the top of the first conveying component 2 is used to convey the PCB board, a detection component 3 is installed on the first conveying component 2, and the detection component 3 includes a door frame 301 fixedly installed on the top of the base 1 and sleeved on the outside of the first conveying component 2, an upper cover shell 302 and a lower cover shell 303 symmetrically arranged on the upper and lower sides of the PCB board are arranged in the door frame 301, a light-emitting unit 304 is installed in the upper cover shell 302, and a photosensitive sensor 305 is installed in the lower cover shell 303, and a lifting component 4 for controlling the relative up and down movement of the upper cover shell 302 and the lower cover shell 303 is installed on the door frame 301.

[0043] During use of the device, the PCB boards are sent one by one to the detection assembly 3 for detection through the first conveying assembly 2. The first conveying assembly 2 includes a first conveying frame 201 transversely fixed on the top of the machine base 1, and the left and right ends of the inner end walls on the front and rear sides of the first conveying frame 201 are rotatably installed with first conveying wheels 202 located on the same horizontal plane, and a first conveying belt 203 is movably sleeved between the two first conveying wheels 202 on the same side. When the PCB board is conveyed by the first conveying assembly 2, the PCB board is mounted on the top of the front and rear first conveying belts 203. The first conveying wheel 202 is externally connected to a servo motor. After the servo motor is powered on and started, it drives the first conveying wheel 202 to rotate, and then drives the two first conveying belts 203 on the front and rear sides to rotate synchronously, so as to convey the PCB board placed on the top from left to right.

[0044] When the PCB board is conveyed to the inside of the detection component 3, it briefly stays between the upper cover shell 302 and the lower cover shell 303 which are symmetrically arranged up and down. At this time, after the lifting component 4 is started, the upper cover shell 302 and the lower cover shell 303 are controlled to move synchronously relative to each other, the upper cover shell 302 moves downward, and the lower cover shell 303 moves upward, and the two are simultaneously fastened to the upper and lower sides of the PCB board, so that the upper and lower sides of the PCB board are closed and covered, and dark chambers are formed on the upper and lower sides of the PCB board. Subsequently, the light-emitting unit 304 installed in the upper cover shell 302 is powered on and started to illuminate the dark chamber formed above the PCB board, and the light-sensitive sensor 305 installed in the lower cover shell 303 is powered on to perform light detection in the dark chamber formed below the PCB board. During the detection, the PCB board body has a strong light-shielding property, and light cannot directly penetrate the PCB board and shine downward. During the detection process, when the light sensor 305 detects a light-transmitting spot at the bottom of the PCB board in the darkroom below, this indicates that the component pins are not tightly soldered during the processing and production of the PCB board. Therefore, gaps appear at the pin holes of the PCB board. The existence of the gaps causes the light emitted in the darkroom above to pass through the gaps into the darkroom below and is detected by the light sensor 305, indicating that the pins of the PCB board are not firmly soldered and need to be reworked. When the light sensor 305 does not detect a light-transmitting spot at the bottom of the PCB board in the darkroom below, it indicates that the pins of the PCB board are firmly soldered and there are no gaps in the pin holes.

[0045] See also Figure 2 The bottom edge of the upper cover shell 302 and the top edge of the lower cover shell 303 are both surrounded and fixed with rubber pads 306. During the use of the device, the rubber pads 306 are surrounded and fixed at the bottom edge of the upper cover shell 302, and the rubber pads 306 are surrounded and fixed at the top edge of the lower cover shell 303. With the help of the flexible filling of the rubber pads 306, when the upper cover shell 302 and the lower cover shell 303 are pressed on the upper and lower sides of the PCB board, the seal between the upper cover shell 302, the lower cover shell 303 and the PCB board is more stringent, and the external light is prevented from entering the upper and lower darkrooms through the gaps between the upper cover shell 302, the lower cover shell 303 and the PCB board to affect the detection results, which effectively ensures the accuracy of the device in detecting the PCB board. At the same time, due to the existence of the rubber pads 306, when the upper cover shell 302 and the lower cover shell 303 are pressed on the PCB board, the pressing position can be flexibly protected to prevent the PCB board from being damaged by excessive squeezing force, further improving the stability of the device during use.

[0046] See also Figure 1 , Figure 5 , Figure 8 and Fig. 9The lifting assembly 4 includes a first electric push rod 401 vertically inverted on the top of the door frame 301, and the telescopic end below the first electric push rod 401 is fixedly connected to the top of the upper cover shell 302. Gears 402 located in the middle of the upper cover shell 302 and the lower cover shell 303 are rotatably installed on both sides of the door frame 301. A first gear rod 403 meshing with one side of the gear 402 is vertically fixed on the upper cover shell 302, and a second gear rod 404 meshing with the other side of the gear 402 is vertically fixed on the lower cover shell 303. During the use of the device, when the upper cover shell 302 and the lower cover shell 303 are controlled to move synchronously relative to each other, When moving toward the PCB board, after the first electric push rod 401 is powered on and started, its telescopic end moves downward and extends, driving the upper cover shell 302 to move downward, driving the first gear rod 403 vertically fixed on both sides of the upper cover shell 302 to move downward synchronously, because the first gear rod 403 and the second gear rod 404 are respectively vertically meshed on both sides of the gear 402, this makes the second gear rod 404 driven to move upward during the downward movement of the first gear rod 403, and then makes the lower cover shell 303 be driven to move upward synchronously during the downward movement of the upper cover shell 302, and finally it is simultaneously clamped on the upper and lower sides of the PCB board.

[0047] When the detection is completed, the upper cover shell 302 and the lower cover shell 303 are controlled to be separated from the PCB board, and the telescopic end of the first electric push rod 401 can be controlled to move upward and contract, thereby driving the upper cover shell 302 to move upward. During the synchronous upward movement of the first gear rod 403, the second gear rod 404 is driven to drive the lower cover shell 303 to move downward. The device sets the gear 402 in the middle position of the upper cover shell 302 and the lower cover shell 303, and the first gear rod 403 vertically fixed to the upper cover shell 302 and the second gear rod 404 vertically fixed to the lower cover shell 303 are respectively engaged on both sides of the gear 402, so that the upper cover shell 302 and the lower cover shell 303 can move synchronously relative to each other. Only the first electric push rod 401 needs to be arranged on one side to realize the simultaneous movement and driving of the upper cover shell 302 and the lower cover shell 303, which is beneficial to reducing the manufacturing and use costs of the device, and can to a certain extent ensure the consistency and stability of the synchronous relative movement of the upper cover shell 302 and the lower cover shell 303.

[0048] Figure 8 and Fig. 9, a plurality of connecting ropes 5 are connected in the upper cover shell 302, and a rubber ball 501 is fixedly installed at the end of the connecting rope 5, the top of the upper cover shell 302 is set as a through structure, an air pump is installed in the machine base 1, and the air pump is connected to the bottom of the upper cover shell 302, a horizontally arranged movable plate 502 is slidably installed in the upper cover shell 302, and the outer size of the movable plate 502 is adapted to the inner size of the upper cover shell 302, the upper end of the connecting rope 5 is fixedly connected to the bottom of the movable plate 502, a spring 503 elastically supported at the bottom of the movable plate 502 is fixedly installed in the upper cover shell 302, an outer cylinder 504 vertically arranged below the lower cover shell 303 is installed on the top of the machine base 1, and a sliding installation is installed in the outer cylinder 504 There is an inner cylinder 505 vertically connected to the bottom of the lower cover shell 303, and the bottom end of the outer cylinder 504 is connected to the air pump. During the use of the device, some PCB boards are too large in size, and bolt holes for reinforcing the installation are usually opened inside. During the detection process, in order to avoid the existence of these bolt holes interfering with the light transmission detection, a large number of rubber balls 501 are installed in the upper cover shell 302, so that when the upper cover shell 302 covers the PCB board, the bolt holes on the PCB board can be blocked with the help of the rubber balls 501, so as to avoid the light emitted by the light-emitting unit 304 during the detection process from entering the darkroom below through the bolt holes, thereby improving the applicability of the device to a certain extent.

[0049] During operation, when the upper cover shell 302 and the lower cover shell 303 are pressed onto the upper and lower sides of the PCB board, the air pump installed in the base 1 will be powered on and started, and through the connection between the outer cylinder 504 and the inner cylinder 505, the air pumping operation is performed in the lower dark room formed by the lower cover shell 303. In the initial state, the bolt holes on the PCB board are in a conducting state, which allows the airflow suction to act on the upper dark room formed by the upper cover shell 302. Since the top of the upper cover shell 302 is set as a through-type structure, under the action of airflow suction, the movable plate 502 overcomes the elastic support of the spring 503 and moves from top to bottom in the upper cover shell 302, driving the lower end of the connecting rope 5 to connect The connected rubber ball 501 moves downward, and at the same time, affected by the air flow, the rubber ball 501 automatically covers the bolt holes on the nearby PCB board to seal the bolt holes, so that the rubber ball 501 is automatically and accurately released, which improves the convenience of the actual use of the device to a certain extent. In the device, the outer cylinder 504 and the inner cylinder 505 that are slidably connected are vertically connected between the lower cover shell 303 and the air pump, so that the up and down movement of the lower cover shell 303 will not interfere with the airflow suction in the lower cover shell 303. While the airflow is sucked, the dust on the surface of the PCB board will be cleaned to ensure the cleanliness of the PCB board after inspection.

[0050] A vertically arranged column tube 506 is installed on the top of the door frame 301, and a valve stem 507 is slidably inserted in the column tube 506. After the bottom end of the valve stem 507 is movable through the upper cover shell 302 and the movable plate 502, it is fixedly connected to the top of the light-emitting unit 304. The top of the column tube 506 is connected to the air pump. Electromagnetic valves are installed in the bottom end of the outer tube 504 and the top end of the column tube 506. During the use of the device, when the air flow is sucked into the lower cover shell 303 through the outer tube 504 and the inner tube 505, the electromagnetic valve installed at the top end of the column tube 506 will be in a closed state. When the rubber ball 501 blocks the numerous bolt holes on the PCB board under the action of air flow suction, the electromagnetic valve installed at the bottom end of the outer tube 504 will be closed, and the electromagnetic valve installed at the bottom end of the outer tube 504 will be closed. The solenoid valve at the top of the column tube 506 will open, so that the lower darkroom formed by the lower cover shell 303 is in a stable negative pressure state. Subsequently, the air pump starts to perform a reciprocating pumping / blowing effect on the column tube 506. Under the pumping / blowing effect of the airflow, the valve stem 507 moves up and down in the column tube 506, driving the light-emitting unit 304 to move up and down in the upper darkroom, constantly adjusting its position. By shaking and changing the position of the light-emitting unit 304, the illumination angle of the light-emitting unit 304 is constantly adjusted during the detection process, which to a certain extent improves the comprehensiveness of light penetrating from different directions through the gaps in the pin holes to the lower darkroom, avoids the light being blocked by components on the PCB board when the light source is fixed, and is conducive to further improving the monitoring accuracy of the device.

[0051] During the operation of the device, an air pressure sensor can also be fixed in the lower cover shell 303. When the darkroom formed by the lower cover shell 303 is in a negative pressure state due to the closure of the solenoid valve at the bottom end of the outer cylinder 504, the air pressure sensor installed in the lower cover shell 303 can monitor the air pressure intensity in the darkroom below in real time. If the air pressure in the darkroom below remains constant, there is no air leakage on the surface, that is, the pins of the components and the pin holes on the PCB board are tightly soldered. If the air pressure rises, there are leaking gaps on the surface, indicating that there are gaps between the pins of the components and the pin holes on the PCB board, and repair is required. Under multiple detection methods, the accuracy of the device in detecting PCB boards can be further improved.

[0052] See also Figure 1 , Figure 5 - Figure 7 and Fig.10A second conveying assembly 6 vertically arranged with respect to the first conveying assembly 2 is installed in the machine base 1, an L-shaped frame 7 is installed on the top of the machine base 1, and a camera 701 arranged above the first conveying assembly 2 is fixedly installed on the L-shaped frame 7, a slot arranged between the first conveying assembly 2 and the lifting assembly 4 is opened on the top of the machine base 1, and a grabbing assembly 8 is installed in the slot, and the grabbing assembly 8 includes an axle seat 801 fixedly installed in the slot, and a rotating shaft 802 is rotatably installed in the axle seat 801, a second electric push rod 803 vertically arranged is fixedly installed on the rotating shaft 802, and a second electric push rod 803 vertically arranged is fixedly installed on the axle seat 801. A first motor 804 is installed that is transmission-connected to the rotating shaft 802, a rotating table 805 is rotatably installed on the telescopic end above the second electric push rod 803, and a pneumatic suction cup 806 connected to the air pump is installed on the top of the rotating table 805, a second motor 807 that is transmission-connected to the rotating table 805 is fixedly installed on the telescopic end of the second electric push rod 803, a worm gear 808 is coaxially fixed on the rotating shaft 802 and the rotating table 805, a worm 809 is fixedly installed on the driving shafts of the first motor 804 and the second motor 807, and the worm 809 is meshed with the corresponding worm gear 808.

[0053] During the use of the device, after the PCB board is inspected by the inspection component 3, it is continued to be conveyed to the right by the first conveying component 2. When passing under the camera 701, the camera 701 captures the top of the PCB board, and the captured picture is compared with the standard picture, wherein the standard picture is the correct position of each component soldered on the circuit board. The comparison is used to verify whether the installation position of each component on the PCB board is correct, and the PCB board is subjected to a secondary inspection. If the inspection fails, rework and correction are also required. The PCB board that fails the inspection is grabbed by the grabbing component 8 to the second conveying component 6 below, and conveyed out by the second conveying component 6. The PCB board that passes the inspection is conveyed to the right by the first conveying component 2.

[0054] Under normal circumstances, the grabbing assembly 8 is vertically arranged between the first conveying assembly 2 and the second conveying assembly 6. When it is necessary to grab the unqualified PCB board on the first conveying assembly 2 and put it on the second conveying assembly 6, the second electric push rod 803 is powered on and started, and its telescopic end stretches upward to fit the bottom of the unqualified PCB board on the first conveying assembly 2. Then, the air pump applies air suction to the pneumatic suction cup 806. Under the action of negative pressure suction, the pneumatic suction cup 806 adsorbs the bottom of the PCB board. Then, the telescopic end of the second electric push rod 803 continues to stretch upward to lift the unqualified PCB board from the first conveying assembly 2, and the second motor 80 After the power is turned on and the rotating table 805 is driven to rotate 90°, the first motor 804 is then powered on and driven to rotate the rotating shaft 802, driving the second electric push rod 803 to swing downward 180°, and the PCB board is inverted on the second conveying assembly 6. When the first conveying assembly 2 is conveying the PCB board, the shorter ends of the PCB board are placed on the top of the front and rear first conveying belts 203, so that the unqualified PCB board can be lifted up and rotated 90°, and can smoothly pass between the front and rear first conveying belts 203 when it is turned downward, thereby ensuring the stability of the unqualified PCB board when it is conveyed from the first conveying assembly 2 to the second conveying assembly 6.

[0055] After the first motor 804 is powered on and started, it drives the worm 809 fixedly connected to its drive shaft to rotate, and then drives the rotating shaft 802 to rotate with the help of the meshing transmission between the worm 809 and the worm wheel 808. Similarly, after the second motor 807 is powered on and started, it will drive another worm 809 fixedly connected to its drive shaft to rotate, and drive the rotating table 805 to rotate with the help of the meshing transmission between the worm 809 and another worm wheel 808. In the process of driving the rotating shaft 802 and the rotating table 805 to rotate, the meshing self-locking property between the worm wheel 808 and the worm 809 is used to ensure the structural stability of the second electric push rod 803 and the rotating table 805 after rotation.

[0056] The second conveying assembly 6 includes a second conveying frame 601 longitudinally fixed in the machine base 1, and second conveying wheels 602 located on the same horizontal plane are rotatably installed at the front and rear ends of the inner end walls on the left and right sides of the second conveying frame 601, and a second conveying belt 603 is movably sleeved between the two second conveying wheels 602 located on the same side. The second conveying wheel 602 is externally connected to a servo motor, and the servo motor drives the second conveying wheel 602 to rotate after being powered on, thereby making the left and right second conveying belts 603 rotate synchronously. The grabbing assembly 8 grabs the unqualified PCB board on the first conveying assembly 2 and places it on the left and right second conveying belts 603 for conveying. The front and rear two first conveying belts 203 and the left and right second conveying belts 603 are provided with a card slot 604 adapted to the PCB board, which is used to limit the position of the PCB board during the conveying process, which is conducive to ensuring the stability of the PCB board during the conveying process by the first conveying assembly 2 and the second conveying assembly 6.

[0057] The above are only the best implementation methods adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A PCB board detection device, comprising a base (1), characterized in that: A first conveying assembly (2) is installed on the top of the machine base (1), and the top of the first conveying assembly (2) is used to convey PCB boards. A detection assembly (3) is installed on the first conveying assembly (2), and the detection assembly (3) comprises a door frame (301) fixedly installed on the top of the machine base (1) and sleeved on the outside of the first conveying assembly (2). An upper cover shell (302) and a lower cover shell (303) symmetrically arranged on the upper and lower sides of the PCB board are arranged in the door frame (301). A light-emitting unit (304) is installed in the upper cover shell (302), and a photosensitive sensor (305) is installed in the lower cover shell (303). A lifting assembly (4) for controlling the relative up and down movement of the upper cover shell (302) and the lower cover shell (303) is installed on the door frame (301); A plurality of connecting ropes (5) are connected inside the upper cover shell (302), and a rubber ball (501) is fixedly installed at the end of the connecting rope (5); the top of the upper cover shell (302) is arranged as a through-type structure; an air pump is installed inside the machine base (1), and the air pump is connected to the bottom of the upper cover shell (302); a horizontally arranged movable plate (502) is slidably installed inside the upper cover shell (302), and the outer dimensions of the movable plate (502) are adapted to the inner dimensions of the upper cover shell (302). The upper end of the connecting rope (5) is fixedly connected to the bottom of the movable plate (502); a spring (503) elastically supported at the bottom of the movable plate (502) is fixedly installed in the upper cover shell (302); an outer cylinder (504) vertically arranged below the lower cover shell (303) is installed on the top of the machine base (1); an inner cylinder (505) vertically connected to the bottom of the lower cover shell (303) is slidably installed in the outer cylinder (504); and the bottom end of the outer cylinder (504) is connected to the air pump.

2. A PCB board detection device according to claim 1, characterized in that: A rubber pad (306) is fixed around the bottom edge of the upper cover shell (302) and the top edge of the lower cover shell (303).

3. A PCB board detection device according to claim 1, characterized in that: The lifting assembly (4) comprises a first electric push rod (401) vertically inverted on the top of the door frame (301), and the telescopic end below the first electric push rod (401) is fixedly connected to the top of the upper cover shell (302), and gears (402) located in the middle of the upper cover shell (302) and the lower cover shell (303) are rotatably mounted on both sides of the door frame (301), a first gear rod (403) meshing with one side of the gear (402) is vertically fixed on the upper cover shell (302), and a second gear rod (404) meshing with the other side of the gear (402) is vertically fixed on the lower cover shell (303).

4. A PCB board detection device according to claim 1, characterized in that: A vertically arranged column tube (506) is installed on the top of the door frame (301), and a valve stem (507) is slidably inserted inside the column tube (506). After the bottom end of the valve stem (507) is movably passed through the upper cover shell (302) and the movable plate (502), it is fixedly connected to the top of the light-emitting unit (304). The top end of the column tube (506) is connected to the air pump. Solenoid valves are installed in the bottom end of the outer tube (504) and the top end of the column tube (506).

5. A PCB board detection device according to claim 1, characterized in that: A second conveying assembly (6) vertically arranged with respect to the first conveying assembly (2) is installed in the machine base (1); an L-shaped frame (7) is installed on the top of the machine base (1); and a camera (701) arranged above the first conveying assembly (2) is fixedly installed on the L-shaped frame (7); a slot arranged between the first conveying assembly (2) and the lifting assembly (4) is opened on the top of the machine base (1), and a grabbing assembly (8) is installed in the slot.

6. A PCB board detection device according to claim 5, characterized in that: The gripping assembly (8) comprises an axle seat (801) fixedly mounted in the slot, and a rotating shaft (802) is rotatably mounted in the axle seat (801), a second electric push rod (803) vertically arranged is fixedly mounted on the rotating shaft (802), a first motor (804) drivingly connected to the rotating shaft (802) is fixedly mounted on the axle seat (801), a rotating table (805) is rotatably mounted on the telescopic end above the second electric push rod (803), a pneumatic suction cup (806) connected to an air pump is mounted on the top of the rotating table (805), and a second motor (807) drivingly connected to the rotating table (805) is fixedly mounted on the telescopic end of the second electric push rod (803).

7. A PCB board detection device according to claim 6, characterized in that: A worm wheel (808) is coaxially fixed on the rotating shaft (802) and the rotating platform (805), and a worm (809) is fixedly mounted on the driving shafts of the first motor (804) and the second motor (807), and the worm (809) is meshed with the corresponding worm wheel (808).

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