PCB multi-piece detection and separating device based on decompression method

Abstract

This invention discloses a PCB multi-board inspection and separation device based on a decompression method, comprising: multiple rack assemblies arranged in a row, each rack assembly consisting of two mirror-image frame bodies; a substrate horizontally fixed to the upper surface of each frame body; a transmission unit installed on one side of the upper surface of each substrate in each rack assembly; a mounting plate fixed to the other side of the upper surface of each substrate; a detection sensor embedded in one of the mounting plates mounted on each rack assembly; a limiting mechanism vertically fixed to one end of each substrate near a support; and four vibration positioning units on each rack assembly. This invention reduces manual intervention through the synergistic effect of precise positioning and vibration separation, lowering the risk of PCB board adhesion or jamming during separation, and facilitating automated and highly efficient separation operations.

Description

Technical Field

[0001] This invention belongs to the technical field of PCB board separation equipment, specifically a PCB board multi-piece detection and separation equipment based on the decompression method. Background Technology

[0002] On automated PCB production lines, board picking and feeding is a crucial link connecting the board separation process with subsequent inspection, packaging, or assembly processes. A carrier fully loaded with PCBs is transported to a fixed station, where a board picking robot performs the picking action. During the decompression method of board picking and separation, high-precision detection sensors (such as load cells) detect the total weight of the carrier and PCBs. An external board picking device descends to pick up the topmost PCB, and the sensor can detect whether the weight reduction is within a preset single-piece weight threshold range. In contrast, conventional carrier positioning in traditional technology uses roller support, which cannot achieve precise positioning and has poor ability to adjust the position and posture of the carrier and PCBs. In addition, when the robot or suction nozzle picks up the topmost PCB, it often picks up multiple boards at once or pulls down lower boards due to vacuum adsorption between boards, static electricity, or oil film adhesion, causing production interruptions, equipment alarms, or boards to fall and be damaged.

[0003] Therefore, it is necessary to provide a PCB board multi-piece inspection and separation device based on the decompression method to solve the problems mentioned in the background art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a PCB board multi-piece inspection and separation device based on the decompression method, comprising: The rack assembly consists of multiple groups arranged in a row. Each group of the rack assembly consists of two frame bodies that are distributed in a mirror image. The two frame bodies in the same group are horizontally connected and fixed by a bracket. The substrate is horizontally fixed to the upper surface of each of the frame bodies; A transmission unit is installed on one side of the upper end face of each of the substrates in each rack assembly, for horizontally transporting the PCB board carrier to the top of the rack assembly. Mounting plates are fixed to the other side of the upper end face of each of the substrates, and the two transmission units on each rack assembly are located between the two mounting plates. The detection sensor is embedded in one of the mounting plates on each rack assembly; A limiting mechanism is vertically fixed at one end of each substrate near the support; Each frame assembly is equipped with four vibration positioning units, which are symmetrically fixed on two mounting plates.

[0005] Furthermore, as a preferred embodiment, a clamping cylinder is horizontally fixed at the end of each substrate away from the support, and a locking plate is connected to the telescopic end of the clamping cylinder; the locking plate is rotatably and adjustablely mounted on the telescopic end.

[0006] Furthermore, preferably, the transmission unit includes: The floating shafts are multiple shafts that are evenly distributed and arranged in a straight line along the length of the substrate. All the floating shafts are vertically installed on the upper surface of the substrate. The ball bearings are rolled and embedded in the middle of the upper end face of each of the floating shafts; A hydraulic chamber is horizontally formed inside the base plate. The base plate has multiple shaft holes that correspond one-to-one with the floating shaft. Each shaft hole is connected to the hydraulic chamber, and the lower end of the floating shaft is sealed and slidably connected inside the shaft hole. An inner spring is disposed within the shaft hole and connected to the lower end of each of the floating shafts.

[0007] Furthermore, as a preferred embodiment, each of the floating shafts rises and falls synchronously with the hydraulic pressure changes in the hydraulic chamber.

[0008] Furthermore, preferably, the vibration positioning unit includes: A fixing plate is vertically fixed to the mounting plate, and a hydraulic cylinder is hinged to the fixing plate. The side clamping shaft is horizontally slidably connected to the mounting plate and located below the fixing plate; A hinge plate, the middle of which is rotatably connected to the fixed plate, and straight slots are provided at both ends of the hinge plate; Two guide pins are provided, one of which is vertically fixed to the side wall of the side clamping shaft, and the other is vertically fixed to the telescopic end of the hydraulic cylinder. The two guide pins are slidably connected in the straight groove. A loading plate is rotatably connected to the fixed plate, and the telescopic end of the hydraulic cylinder is also connected to the loading plate; The vibration excitation device is fixed on the loading plate.

[0009] Furthermore, preferably, the excitation device includes: A fixed cylinder has a bushing slidably mounted coaxially on its lower end face, and a support spring is connected between the bushing and the fixed cylinder. The connecting column is coaxially mounted inside the bushing. A support pad is installed at the lower end of the connecting column, and a cylindrical tube is fixed on the support pad. The cylindrical tube is threadedly assembled to the lower end of the connecting column. The vibrator consists of multiple vibrators arranged in a circle, each of which is fixed inside a fixed cylinder, and the vibration output end of each vibrator is connected to the bushing.

[0010] Furthermore, as a preferred embodiment, the connecting column has an inclined guide cavity, a vibration shaft is slidably connected in the guide cavity, a shaft is centrally located in the fixed cylinder, the lower end of the shaft is coaxially rotatably connected to a connecting shaft, and the lower end of the connecting shaft is connected to the vibration shaft via a universal joint. An ultrasonic oscillator is mounted on the upper end of the fixed cylinder, and the output end of the ultrasonic oscillator is connected to the shaft.

[0011] Furthermore, preferably, the tilt angle of the guide cavity is not less than 15°.

[0012] Furthermore, as a preferred embodiment, the connecting column is rotatably connected to the fixed cylinder via a bearing, and an end cover is coaxially fixed to the lower end of the bushing. The end cover has multiple connecting holes circumferentially formed, one of which is vertically rotatably connected to a rotating shaft, and the other connecting holes are rotatably connected to a drive shaft. The lower ends of both the drive shaft and the rotating shaft are fixed with driven teeth. A main gear is coaxially fixed to the outside of the connecting column, and the main gear meshes with each of the driven gears for transmission.

[0013] Furthermore, as a preferred embodiment, the lower end of the vibration shaft is fitted with a non-slip pad.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the transmission unit employs multiple floating shafts, each with rolling balls. A fully loaded PCB carrier is supported by these balls, enabling multi-angle displacement adjustment. Precise positioning of the PCB carrier is achieved through the telescopic clamping action of the clamping cylinder. Four symmetrically distributed vibration positioning units are also included, each positioned at one of the four corners of the carrier. These units utilize hydraulic cylinders to push the side clamping shafts horizontally during telescopic movement, further enhancing the positioning and clamping of the carrier. Additionally, the vibration devices in the four positioning units contact the upper surface of the carrier, providing both vertical and tilting vibrations. This effectively promotes the separation of PCBs one by one during the separation process, preventing simultaneous transfer of multiple boards and improving the success rate and reliability of the separation process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the transmission unit and the excitation positioning unit in this invention; Figure 3 This is a schematic diagram of the excitation device in this invention; Figure 4 This is a schematic cross-sectional view of the connecting column in this invention; Figure 5This is a schematic diagram of the vehicle under vibration loading force in this invention; In the diagram: 1. Frame; 11. Bracket; 12. Base plate; 13. Mounting plate; 14. Detection sensor; 15. Limiting mechanism; 16. Clamping cylinder; 17. Locking plate; 2. Transmission unit; 21. Floating shaft; 22. Ball bearing; 23. Hydraulic chamber; 3. Vibration positioning unit; 31. Fixing plate; 32. Hydraulic cylinder; 33. Side clamping shaft; 34. Hinge plate; 35. Straight groove; 36. Guide pin; 37. Loading plate; 4. Vibration device; 41. Fixing cylinder; 42. Bushing; 43. Connecting column; 44. Support pad; 45. Tube; 46. Vibrator; 47. Bearing; 5. Guide cavity; 51. Vibration shaft; 52. Shaft; 53. Connecting shaft; 54. Ultrasonic oscillator; 6. End cover; 61. Transmission shaft; 62. Main gear; 63. Anti-slip pad. Detailed Implementation

[0016] Please see Figures 1-4 In this embodiment of the invention, a PCB board multi-piece inspection and separation device based on the decompression method includes: The rack assembly consists of multiple sets arranged in a row. Each set of the rack assembly consists of two frame bodies 1 that are distributed in a mirror image. The two frame bodies 1 in the same set are horizontally connected and fixed by a bracket 11. The rack assembly serves as the supporting part of the whole mechanism. The substrate 12 is horizontally fixed to the upper end surface of each of the frame bodies 1; The transmission unit 2 is installed on one side of the upper end face of each of the substrates 12 in each rack assembly, and is used to horizontally move the PCB board carrier to the top of the rack assembly. After the fully loaded PCB board carrier is completely positioned, the board can be picked up by a robot arm set outside the rack assembly. Mounting plate 13 is fixed on the other side of the upper end face of each of the substrates 12, and the two transmission units 2 on each rack assembly are located between the two mounting plates 13. The detection sensor 14 is embedded in one of the mounting plates 13 on each set of frame components. The core function of the detection sensor 14 (usually a high-precision photoelectric sensor or fiber optic sensor) is to accurately detect whether the carrier has reached the predetermined working position. Embedding the detection sensor 14 inside the mounting plate 13, rather than on an external bracket, greatly saves equipment space, makes the structure more compact, and avoids interference from external wiring and brackets on the movement path of the robot or other mechanisms. The limiting mechanism 15 is vertically fixed at one end of each of the base plates 12 near the support 11; Vibration positioning unit 3, each frame assembly is provided with four vibration positioning units 3, the four vibration positioning units 3 are symmetrically fixed on two mounting plates 13; during the decompression method for taking and separating the board, the detection sensor (such as a weighing sensor) in the carrier can detect the total weight of the carrier and the PCB board and the change in the total weight of the carrier and the PCB board after taking a single board.

[0017] In this embodiment, a clamping cylinder 16 is horizontally fixed at one end of each substrate 12 away from the bracket 11, and a locking plate 17 is connected to the telescopic end of the clamping cylinder 16; the clamping cylinder 16 can use the locking plate 17 in conjunction with the limiting mechanism 15 to position and clamp the carrier in the horizontal direction. The locking plate 17 is rotatably and adjustablely mounted on the telescopic end so that it can be adjusted to the optimal angle before use so as to contact the side wall of the vehicle. In actual operation, when the locking plate 17 with the preset angle contacts the vehicle, it still retains a small rotational margin to cope with the small random deviation of the vehicle placement or the manufacturing tolerance of the vehicle itself, so as to achieve the final fit.

[0018] In a preferred embodiment, the transmission unit 2 includes: The floating shafts 21 are multiple ones that are equally spaced and arranged in a straight line along the length of the substrate 12. All the floating shafts 21 are vertically installed on the upper surface of the substrate 12. The ball bearings 22 are embedded in the middle of the upper end face of each of the floating shafts 21. The multiple ball bearings 22 can provide rolling support for the vehicle, which facilitates multi-directional displacement adjustment of the vehicle and enables subsequent precise positioning. A hydraulic chamber 23 is formed inside the base plate 12. The base plate 12 has a plurality of shaft holes corresponding to the floating shaft 21. Each shaft hole is connected to the hydraulic chamber 23. The lower end of the floating shaft 21 is sealed and slidably connected inside the shaft hole. A hydraulic channel is connected to the outside of the hydraulic chamber 23. A hydraulic valve is connected to the outside of the hydraulic channel. An inner spring, connected to the lower end of each of the floating shafts 21, provides elastic support to the floating shaft 21.

[0019] In this embodiment, each of the floating shafts 21 rises and falls synchronously with the hydraulic pressure changes in the hydraulic chamber 23. Specifically, during the carrier transfer and positioning, the hydraulic valve is closed, the pressure in the hydraulic chamber 23 remains constant, and each floating shaft 21 is in a relatively static state. The carrier will not experience any vertical movement during positioning. However, during the board removal operation, the hydraulic valve is opened, the floating shaft 21 slides flexibly in the axial direction, and the inner spring provides elastic support for the floating shaft 21 so as to cooperate with the vibration positioning unit 3 to separate the PCB boards on the carrier one by one during the board separation process.

[0020] In this embodiment, the excitation positioning unit 3 includes: A fixing plate 31 is vertically fixed to the mounting plate 13, and a hydraulic cylinder 32 is hinged to the fixing plate 31. The side clamping shaft 33 is horizontally slidably connected to the mounting plate 13 and located below the fixing plate 31; The hinge plate 34 is rotatably connected to the fixed plate 31, and straight slots 35 are provided at both ends of the hinge plate 34. Two guide pins 36 are provided, one of which is vertically fixed to the side wall of the side clamping shaft 33, and the other is vertically fixed to the telescopic end of the hydraulic cylinder 32. The two guide pins 36 are slidably connected in the straight groove 35 respectively. In this way, when the hydraulic cylinder 32 retracts hydraulically, it can use the hinge plate 34 to push the side clamping shaft 33 to gradually slide horizontally out of the mounting plate 13. At this time, the four side clamping shafts 33 can position and clamp the carrier in the horizontal left and right directions. The loading plate 37 is rotatably connected to the fixed plate 31, and the telescopic end of the hydraulic cylinder 32 is connected to the loading plate 37; The excitation device 4 is fixed on the loading plate 37. When the four side clamping shafts 33 are positioned and clamped to the left and right positions of the vehicle in the horizontal direction, the excitation device 4 on the loading plate 37 is tilted and raised, and the excitation device 4 does not contact the upper end face of the vehicle. When the hydraulic cylinder 32 extends hydraulically, the four side clamping shafts 33 are disengaged from the side wall of the vehicle, and the excitation device 4 gradually contacts and presses against the upper end face of the vehicle.

[0021] In this embodiment, the excitation device 4 includes: A fixed cylinder 41 has a bushing 42 slidably mounted on its lower end face, and a support spring is connected between the bushing 42 and the fixed cylinder 41. The connecting column 43 is coaxially disposed inside the bushing 42; A support pad 44 is installed at the lower end of the connecting column 43. A cylindrical tube 45 is fixed on the support pad 44. The cylindrical tube 45 is threadedly assembled to the lower end of the connecting column 43. Multiple vibrators 46 are arranged circumferentially, each fixed inside a fixed cylinder 41. The vibration output end of each vibrator 46 is connected to the bushing 42. When the four excitation devices 4 come into contact with the upper surface of the carrier, the vibrators 46 inside operate simultaneously, thereby enabling the axial vibration of the connecting column 43 and transmitting it directly to the carrier, and then to the entire PCB stack. With the four excitation points located at the four corners of the carrier, the synchronous application of axial vibration results in a coordinated and nearly uniform overall micro-amplitude vibration of the entire carrier and the board stack. Especially during board removal operations, due to the slight unevenness and adhesive force differences between the PCB boards, under the action of continuous and alternating axial inertial forces, the contact points between the boards will undergo slight and asynchronous elastic deformation and slippage, thereby gradually destroying the adhesion points and achieving the board separation effect during the board removal process, reducing the probability of picking up multiple boards at once or the lower layer boards being pulled up together.

[0022] In a preferred embodiment, a guide cavity 5 is inclinedly formed inside the connecting column 43, and a vibration shaft 51 is slidably connected inside the guide cavity 5. A shaft 52 is centrally arranged inside the fixed cylinder 41, and the shaft 52 is vertically slidably arranged in the fixed cylinder 41. The lower end of the shaft 52 is coaxially rotatably connected to a connecting shaft 53, and the connecting shaft 53 can slide axially synchronously with the shaft 52. The lower end of the connecting shaft 53 is connected to the vibration shaft 51 through a universal joint. An ultrasonic oscillator 54 is mounted on the upper end of the fixed cylinder 41. The output end of the ultrasonic oscillator 54 is connected to the shaft 52. The ultrasonic oscillator 54 can output high-frequency vibration, thereby using the shaft 52 and the connecting shaft 53 to drive the vibration shaft 51 to vibrate. Since the vibration shaft 51 slides back and forth at high frequency in the inclined guide cavity 5, when its end contacts the carrier, the force applied to the carrier is a high-frequency reciprocating micro-impact force with the same direction as the inclination angle. This force can be decomposed into a vertical component (used to overcome normal adhesion) and a horizontal component (used to generate tangential micro-slippage), thereby achieving a horizontal vibration displacement effect on the carrier. In other words, the main function of the excitation device 4 is to provide vibration separation for the PCB boards on the carrier, overcome the large inter-board normal pressure, strong static friction and possible vacuum adsorption, ensure that the top 1-2 boards can be effectively separated, and at the same time avoid separation failure due to insufficient energy or board stack disorder due to excessive energy. Therefore, refer to Figure 5Specifically, when the carrier is fully loaded, the vibrators 46 of the four excitation devices 4 start simultaneously, driving the connecting column 43 to perform synchronous and in-phase axial vibration at a high amplitude and low to medium frequency (e.g., 50-200Hz). The main purpose of this stage is to use the large inertial force to quickly break the overall, large-area vacuum adsorption and electrostatic binding between the PCB board stacks. The strong vertical vibration can "untie" the entire board stack and establish an initial separation trend. While the vertical vibration is sustained or maintained at a small amplitude, the ultrasonic oscillator 54 starts. At this time, the four excitation devices 4 can vibrate and move the carrier in one direction (left or right), causing the top PCB board to produce a slight lateral slippage, thereby separating it from the lower board. When the carrier is lightly loaded, the pressure between the boards is small, and the adhesion force may be mainly electrostatic, but the PCB board is more "floaty" and prone to accidental displacement. The vibration needs to be sufficient for separation, but not too intense; at this time, the vibrators 46 of the two excitation devices 4 at the corner of the carrier PCB board are synchronously vertically vibrating with low amplitude and the same frequency, while the other two excitation devices 4 use ultrasonic oscillators 54 to provide left and right opposite vibration to ensure uniform separation force and prevent large slippage of the top PCB board.

[0023] In this embodiment, the tilt angle of the guide cavity 5 is not less than 15°.

[0024] In this embodiment, the connecting column 43 is rotatably connected to the fixed cylinder 41 via the bearing 47. The lower end of the bushing 42 is coaxially fixed with an end cover 6. The end cover 6 has multiple connecting holes around its circumference. One of the connecting holes is vertically rotatably connected to a rotating shaft (not shown in the figure). The rotating shaft is driven to rotate by an external control motor. The other connecting holes are rotatably connected to a transmission shaft 61. The lower ends of the transmission shaft 61 and the rotating shaft are both fixed with driven teeth. A main gear 62 is coaxially fixed to the outside of the connecting column 43. The main gear 62 meshes with each of the driven teeth for transmission. In this way, when the rotating shaft is rotated for adjustment, the circumferential angle of the connecting column 43 can be adjusted by the meshing action of the driven teeth and the main gear 62, so as to adjust the tilt orientation of the guide cavity 5 and thus control the vibration direction of the vibration shaft 51, which is highly flexible.

[0025] The lower end of the vibration shaft 51 is fitted with an anti-slip pad 63 to ensure that the vibration shaft 51 makes frictional contact with the carrier when it vibrates, resulting in good noise reduction.

[0026] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A PCB board multi-piece inspection and separation device based on decompression method, characterized in that, It includes: The rack assembly consists of multiple groups arranged in a row. Each group of rack assemblies consists of two mirror-distributed frame bodies (1). The two frame bodies (1) in the same group are horizontally connected and fixed by a bracket (11). The substrate (12) is horizontally fixed to the upper end face of each of the frame bodies (1); The transmission unit (2) is installed on one side of the upper end face of each of the substrates (12) of each rack assembly, for horizontally transporting the PCB board carrier to the top of the rack assembly. Mounting plate (13) is fixed on the other side of the upper end face of each of the base plates (12), and the two transmission units (2) on each rack assembly are located between the two mounting plates (13); The detection sensor (14) is embedded in one of the mounting plates (13) mounted on each rack assembly; A limiting mechanism (15) is vertically fixed to one end of each of the substrates (12) near the support (11); Vibration positioning unit (3): Each frame assembly is provided with four vibration positioning units (3), and the four vibration positioning units (3) are symmetrically fixed on two mounting plates (13).

2. The PCB multi-piece inspection and separation equipment based on the decompression method according to claim 1, characterized in that: Each of the substrates (12) has a clamping cylinder (16) fixed horizontally at one end away from the bracket (11), and a locking plate (17) is connected to the telescopic end of the clamping cylinder (16); the locking plate (17) is rotatably and adjustablely mounted on the telescopic end.

3. The PCB multi-piece inspection and separation equipment based on the decompression method according to claim 1, characterized in that, The transmission unit (2) includes: The floating shafts (21) are multiple ones that are equally spaced and arranged in a straight line along the length of the substrate (12). The floating shafts (21) are all vertically installed on the upper surface of the substrate (12). The ball bearing (22) is rolled and embedded in the middle of the upper end face of each of the floating shafts (21); The hydraulic chamber (23) is horizontally opened in the base plate (12). The base plate (12) has a plurality of shaft holes corresponding to the floating shaft (21). Each shaft hole is connected to the hydraulic chamber (23), and the lower end of the floating shaft (21) is sealed and slidably connected in the shaft hole. An inner spring is disposed in the shaft hole and connected to the lower end of each of the floating shafts (21).

4. The PCB multi-piece inspection and separation equipment based on the decompression method according to claim 3, characterized in that: Each of the floating shafts (21) rises and falls synchronously with the hydraulic pressure changes in the hydraulic chamber (23).

5. A PCB board multi-piece inspection and separation device based on decompression method according to claim 1, characterized in that, The excitation positioning unit (3) includes: A fixing plate (31) is vertically fixed on the mounting plate (13), and a hydraulic cylinder (32) is hinged on the fixing plate (31). The side clamping shaft (33) is horizontally slidably connected to the mounting plate (13) and located below the fixing plate (31); A hinge plate (34) is rotatably connected to the fixed plate (31) in the middle, and straight slots (35) are provided at both ends of the hinge plate (34). Two guide pins (36) are provided, one of which is vertically fixed on the side wall of the side clamping shaft (33) and the other is vertically fixed on the telescopic end of the hydraulic cylinder (32). The two guide pins (36) are slidably connected in the straight groove (35). The loading plate (37) is rotatably connected to the fixed plate (31), and the telescopic end of the hydraulic cylinder (32) is also connected to the loading plate (37); The excitation device (4) is fixed on the loading plate (37).

6. A PCB board multi-piece inspection and separation device based on decompression method according to claim 5, characterized in that, The excitation device (4) includes: A fixed cylinder (41) has a bushing (42) slidably mounted on its lower end face, and a support spring is connected between the bushing (42) and the fixed cylinder (41). The connecting column (43) is coaxially disposed inside the bushing (42); A support pad (44) is installed at the lower end of the connecting column (43), and a cylindrical tube (45) is fixed on the support pad (44). The cylindrical tube (45) is threadedly fitted to the lower end of the connecting column (43). There are multiple vibrators (46) arranged in a circle. Each vibrator (46) is fixed in a fixed cylinder (41). The vibration output end of each vibrator (46) is connected to the bushing (42).

7. A PCB board multi-piece inspection and separation device based on decompression method according to claim 6, characterized in that: The connecting column (43) is inclinedly provided with a guide cavity (5), and a vibration shaft (51) is slidably connected in the guide cavity (5). A shaft (52) is provided in the center of the fixed cylinder (41). The lower end of the shaft (52) is coaxially rotatably connected to a connecting shaft (53). The lower end of the connecting shaft (53) is connected to the vibration shaft (51) through a universal joint. An ultrasonic oscillator (54) is mounted on the upper end of the fixed cylinder (41), and the output end of the ultrasonic oscillator (54) is connected to the shaft (52).

8. A PCB board multi-piece inspection and separation device based on decompression method according to claim 7, characterized in that: The tilt angle of the guide cavity (5) is not less than 15°.

9. A PCB board multi-piece inspection and separation device based on the decompression method according to claim 7, characterized in that: The connecting column (43) is rotatably connected to the fixed cylinder (41) via the bearing (47). The lower end of the bushing (42) is coaxially fixed with an end cover (6). The end cover (6) has multiple connecting holes around its circumference. One of the connecting holes is vertically rotatably connected to a rotating shaft, and the other connecting holes are rotatably connected to a transmission shaft (61). The lower ends of the transmission shaft (61) and the rotating shaft are both fixed with driven teeth. The main gear (62) is coaxially fixed to the outside of the connecting column (43), and the main gear (62) meshes with each of the driven teeth for transmission.

10. A PCB board multi-piece inspection and separation device based on decompression method according to claim 7, characterized in that: The lower end of the vibration shaft (51) is fitted with a non-slip pad (63).

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