Efficient feeding device for SMT (Surface Mount Technology)

Abstract

The utility model belongs to the technical field of PCB (Printed Circuit Board) detection, and relates to an efficient feeding device for SMT (Surface Mount Technology), which comprises two supporting frames, a conveying belt is arranged at the top end of the middle of the two supporting frames, a plurality of bearing plates are uniformly arranged at the top end of the conveying belt, and supporting columns are fixed at four end corners of the lower end of each bearing plate; the supporting columns are fixedly connected with the conveying belt. By means of the structural design of the overturning assembly, when the PCBs are conveyed for AOI optical detection, the PCBs fixed to the containing frame can be automatically overturned in the moving process by means of the overturning assembly, manual intervention is not needed, double-face detection can be achieved in each conveying process of each PCB, and the production efficiency is improved. The double-sided PCB does not need to be placed on the conveying device again to move for secondary detection, so that the working efficiency is improved, meanwhile, the whole turnover assembly is driven in a passive mode, and compared with driving of some electrical equipment, the turnover assembly is more stable, not prone to damage and long in service life.

Description

Technical Field

[0001] This utility model belongs to the field of PCB board inspection technology and relates to a high-efficiency feeding device for SMT assembly. Background Technology

[0002] SMT (Surface Mount Technology) is an abbreviation for a series of processes performed on a printed circuit board. SMT is the most popular technology and process in the electronics assembly industry. Surface mount technology is a circuit assembly technology that mounts leadless or short-lead surface mount components onto the surface of a printed circuit board or other substrate, and then assembles them by methods such as current-carrying soldering or dip soldering. In general, the electronic products we use are designed according to the circuit diagram by adding various electronic components such as capacitors and resistors to a PCB. Therefore, various electrical appliances require various different SMT processing technologies. Currently, SMT components are mainly transported by conveyor belts.

[0003] The existing technology has the following technical problems: Currently, when SMT placement conveyor devices move PCB boards for AOI optical inspection, the PCB boards are usually placed flat on the conveyor device to keep the PCB boards stable and facilitate optical inspection. However, when the existing conveyor device transports the flat PCB boards, the AOI optical inspection can only inspect one side of the PCB board at a time. When inspecting double-sided PCB boards, the double-sided PCB boards need to be placed on the conveyor device again for secondary inspection, which reduces work efficiency. Utility Model Content

[0004] The technical problem this invention aims to solve is as follows: Currently, when SMT placement conveyor devices move PCB boards for AOI optical inspection, the PCB boards are usually placed flat on the conveyor device to ensure stable transport and facilitate optical inspection. However, existing conveyor devices can only inspect one side of the PCB board at a time when transporting flat PCB boards. When inspecting double-sided PCB boards, both sides need to be placed on the conveyor device again for secondary inspection, resulting in reduced work efficiency.

[0005] This utility model discloses an efficient feeding device for SMT assembly, comprising two support frames, a conveyor belt disposed at the top center of the two support frames, a plurality of bearing plates evenly disposed at the top of the conveyor belt, support columns fixed at the four corners of the lower end of each bearing plate, the support columns being fixedly connected to the conveyor belt, a connecting block fixed at the middle of the top of each bearing plate, a placement frame disposed at the top of each bearing plate, a flipping shaft fixed at one end of the placement frame near the connecting block, the flipping shaft being rotatably connected to the connecting block, flipping components disposed on both sides of the flipping shaft for flipping the placement frame, and a clamping component disposed on the inner side of the placement frame for clamping and fixing the material.

[0006] The flipping assembly includes a rack frame, which is fixed at the top center of the support frame. A fixed rack is fixed at the bottom of the top of the rack frame. A rotating shaft is laterally arranged on the inner side of the middle of the support plate, corresponding to the flipping shaft. The rotating shaft is rotatably connected to the support plate. Both ends of the rotating shaft extend to the outer side of the support plate. A drive gear is fixed at the outer end of the rotating shaft on the support plate. The drive gear meshes with the fixed rack. The rotating shaft is connected to the flipping shaft through a transmission assembly.

[0007] The transmission assembly includes a reversing gear, which is fixed at the outer ends of the reversing shaft. A transmission gear is fixed at the position corresponding to the reversing gear on the rotating shaft, and the transmission gear meshes with the reversing gear.

[0008] The clamping assembly includes two placement plates, which are symmetrically arranged on the inner side of the placement frame. A movable frame is fixed to the side of each placement plate near the placement frame, extending into the inner side of the placement frame and slidably connected to it. A transmission rack is fixed to the side of the movable frame away from the placement plate. A connecting shaft is rotatably connected to the inner side of the placement frame at a position corresponding to the transmission rack. Driven gears are fixed at both ends of the connecting shaft at positions corresponding to the transmission rack, and the driven gears mesh with the transmission rack. A connecting frame is fixed to the outer middle of the connecting shaft. A clamping plate is fixed to the end of the connecting frame away from the connecting shaft. Return springs are fixed to the lower ends of both ends of the placement plates and are fixedly connected to the placement frame.

[0009] A connecting rod is provided between the two movable frames, and both ends of the connecting rod are fixedly connected to the two movable frames. A limit component is provided inside the placement frame and below the connecting rod.

[0010] The limiting component includes a limiting rod, which is longitudinally disposed on the inner side of the placement frame and slidably connected to the placement frame. A limiting block is fixed to one end of the limiting rod near the connecting rod, and the top end of the limiting block near the connecting rod is set as an inclined surface. The end of the limiting rod away from the limiting block extends to the outer side of the placement frame. A lifting handle is fixed to one end of the limiting rod on the outer side of the placement frame. A limiting spring is sleeved on the outer side of the end of the limiting rod near the limiting block. One end of the limiting spring is fixedly connected to the limiting block, and the other end of the limiting spring is fixedly connected to the placement frame.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the structural design of the flipping component, when the PCB board is transported for AOI optical inspection, the flipping component enables the PCB board fixed on the placement rack to automatically flip during the movement without manual intervention. This allows each PCB board to be inspected on both sides during each transport process, eliminating the need to place the double-sided PCB board on the transport device again for secondary inspection, thereby improving work efficiency. At the same time, the entire flipping component adopts a passive drive, which is more stable than the drive of some electrical equipment, less prone to damage, and has a long service life.

[0012] Through the structural design of the clamping assembly, the PCB board is fixed on the placement rack, so that the PCB board can be flipped at the same time when the placement rack is flipped. This effectively avoids displacement of the PCB board, improves the stability of the PCB board during flipping, and facilitates the picking and placing of the PCB board. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the flipping component in this utility model.

[0015] Figure 3 This is a schematic diagram of the clamping component in this utility model.

[0016] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0017] Figure 5 This is a schematic diagram of the limiting component in this utility model.

[0018] In the diagram: 1. Support frame; 2. Conveyor belt; 3. Bearing plate; 4. Support column; 5. Rack frame; 6. Fixed rack; 7. Placement frame; 8. Tilting shaft; 9. Tilting gear; 10. Connecting block; 11. Rotating shaft; 12. Drive gear; 13. Transmission gear; 14. Placement plate; 15. Clamping plate; 16. Moving frame; 17. Return spring; 18. Transmission rack; 19. Connecting shaft; 20. Driven gear; 21. Connecting frame; 22. Limiting block; 23. Limiting rod; 24. Limiting spring; 25. Connecting rod; 26. Lifting handle. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Example 1

[0022] like Figures 1-5 As shown, the device includes two support frames 1. A conveyor belt 2 is installed at the top center of the two support frames 1. Multiple bearing plates 3 are evenly arranged at the top of the conveyor belt 2. To facilitate the fixing of the bearing plates 3, support columns 4 are fixed at the four corners of the bottom of the bearing plates 3. The support columns 4 are fixedly connected to the conveyor belt 2. A connecting block 10 is fixed at the middle of the top of the bearing plate 3. To facilitate the placement and fixing of the PCB board, a placement frame 7 is installed at the top of the bearing plate 3. A flipping shaft 8 is fixed at one end of the placement frame 7 near the connecting block 10. The flipping shaft 8 is rotatably connected to the connecting block 10. Flipping components are installed on both sides of the flipping shaft 8 for flipping the placement frame 7. A clamping component is installed on the inner side of the placement frame 7 for clamping and fixing the material.

[0023] Through the structural design of the flipping component, the PCB board can be automatically flipped during the transport of the PCB board fixed on the placement rack 7 during AOI optical inspection without manual intervention. This allows each PCB board to be inspected on both sides during each transport, eliminating the need to place the double-sided PCB board on the transport device for secondary inspection, thereby improving work efficiency. At the same time, the entire flipping component adopts a passive drive, which is more stable than the drive of some electrical equipment, less prone to damage, and has a long service life.

[0024] The flipping assembly includes a rack frame 5, which is fixed at the top center of the support frame 1. To facilitate the flipping of the placement frame 7 when the support plate 3 moves, a fixed rack 6 is fixed to the lower top of the rack frame 5. A rotating shaft 11 is laterally arranged on the inner middle side of the support plate 3, corresponding to the flipping shaft 8. The rotating shaft 11 is rotatably connected to the support plate 3, and both ends of the rotating shaft 11 extend to the outer side of the support plate 3. To facilitate the rotation of the rotating shaft 11 by the fixed rack 6 when the support plate 3 moves, the rotating shaft 11 is located on the support plate 1. A drive gear 12 is fixed to one end of the outer side of plate 3. The drive gear 12 is meshed with the fixed rack 6. In order to facilitate the rotation of the rotating shaft 11, the rotating shaft 11 is connected to the rotating shaft 8 through a transmission assembly. The transmission assembly includes a rotating gear 9, which is fixed at the outer ends of the rotating shaft 8. In order to facilitate the rotation of the rotating shaft 11, a transmission gear 13 is fixed at the corresponding position of the rotating shaft 11 and the rotating gear 9. The transmission gear 13 is meshed with the rotating gear 9.

[0025] During operation, the PCB board is first fixed to the placement rack 7 using the clamping assembly. Then, the conveyor belt 2 is started, causing the support plate 3 and the placement rack 7 to move simultaneously via the support column 4. When the support plate 3 moves, it drives the rotating shaft 11 and the drive gear 12 to move simultaneously. When the drive gear 12 moves to mesh with the fixed rack 6, the drive gear 12 will rotate. When the drive gear 12 rotates, it drives the transmission gear 13 fixed to the rotating shaft 11 to rotate simultaneously via the rotating shaft 11. When the transmission gear 13 rotates, it drives the flip shaft 8 fixed to the flip shaft 9 to rotate via the flip gear 9 connected to it. When the flip shaft 8 rotates, it drives the placement rack 7 fixed to it to rotate around the flip shaft 8, thereby flipping the PCB fixed on the placement rack 7. When the top of the placement rack 7 contacts the top of the other end of the support plate 3, the drive gear 12 just disengages from the fixed rack 6, thus completing the flipping of the PCB board. Example 2

[0026] like Figures 3-5As shown, to facilitate the placement of the PCB board, the clamping assembly includes two placement plates 14, which are symmetrically arranged on the inner side of the placement frame 7. To facilitate the connection between the placement plates 14 and the placement frame 7, a movable frame 16 is fixed to the side of the placement plate 14 closest to the placement frame 7. The movable frame 16 extends into the inner side of the placement frame 7 and is slidably connected to the placement frame 7. A transmission rack 18 is fixed to the side of the movable frame 16 away from the placement plate 14. A connecting shaft 19 is rotatably connected to the inner side of the placement frame 7 at a position corresponding to the transmission rack 18. To facilitate the placement of the PCB board, the clamping assembly includes two placement plates 14, which are symmetrically arranged on the inner side of the placement frame 7. When moving, the connecting shaft 19 can be rotated by the transmission rack 18. Driven gears 20 are fixed at both ends of the connecting shaft 19 and at positions corresponding to the transmission rack 18. Driven gears 20 are meshed with the transmission rack 18. In order to facilitate the clamping and fixing of the PCB board when the connecting shaft 19 rotates, a connecting frame 21 is fixed on the outer middle of the connecting shaft 19. A clamping plate 15 is fixed at the end of the connecting frame 21 away from the connecting shaft 19. In order to facilitate the reset of the placement plate 14, a reset spring 17 is fixed at the lower end of both ends of the placement plate 14. The reset spring 17 is fixedly connected to the placement frame 7.

[0027] When it is necessary to fix the PCB board, first place the PCB board on top of the two placement plates 14, then press the PCB board down slightly. When the PCB board moves the placement plates 14, the placement plates 14 move simultaneously through the moving frame 16 and the transmission rack 18. When the transmission rack 18 moves, it drives the connecting shaft 19 fixed to the driven gear 20 to rotate through the driven gear 20 meshing with it. When the connecting shaft 19 rotates, it drives the clamping plate 15 fixed to the connecting frame 21 to rotate around the connecting shaft 19. When the clamping plate 15 moves away from the connecting frame 21, it rotates. When one side of the clamping plate 16 contacts the top of the PCB board, the PCB board can be clamped. At this time, the moving frame 16 is limited by the limiting component to prevent it from moving closer to the clamping plate 15, thus completing the clamping and fixing of the PCB board. When unloading, the limiting component can be released from the limiting component. At this time, under the elastic action of the return spring 17, the placement plate 14 is pushed away from the return spring 17, causing the moving frame 16 to drive the transmission rack 18 to move in the opposite direction. This, in turn, drives the connecting shaft 19 to rotate in the opposite direction through the driven gear 20, so that the clamping plate 15 releases its clamping of the PCB board. Through the structural design of the clamping component, the PCB board is fixed on the placement frame 7, so that when the placement frame 7 is flipped, the PCB board can be flipped at the same time, effectively preventing the PCB board from shifting, improving the stability of the PCB board during flipping, and facilitating the picking and placing of the PCB board. Example 3

[0028] like Figure 5As shown, in order to facilitate the simultaneous limiting of the two movable frames 16, a connecting rod 25 is provided between the two movable frames 16. Both ends of the connecting rod 25 are fixedly connected to the two movable frames 16. A limiting component is provided inside the placement frame 7 and below the connecting rod 25.

[0029] The limiting component includes a limiting rod 23, which is longitudinally arranged inside the placement rack 7 and slidably connected to the placement rack 7. To facilitate the movement and limiting of the connecting rod 25, a limiting block 22 is fixed to one end of the limiting rod 23 near the connecting rod 25. The top end of the limiting block 22 near the connecting rod 25 is set as an inclined surface. The end of the limiting rod 23 away from the limiting block 22 extends to the outside of the placement rack 7. To facilitate the movement of the limiting rod 23, a lifting handle 26 is fixed to one end of the limiting rod 23 located on the outside of the placement rack 7. To facilitate the limiting of the limiting block 22, a limiting spring 24 is sleeved on the outside of the end of the limiting rod 23 near the limiting block 22. One end of the limiting spring 24 is fixedly connected to the limiting block 22, and the other end of the limiting spring 24 is fixedly connected to the placement rack 7.

[0030] When it is necessary to release the restriction on the movable frame 16, firstly, by pulling the lifting handle 26 away from the placement frame 7, the lifting handle 26 drives the limiting block 22 to move through the limiting rod 23. When the limiting block 22 moves to the point of disengaging from the connecting rod 25, the limiting block 22 releases the restriction on the connecting rod 25, thereby releasing the restriction on the movable frame 16. When clamping the PCB board, the placement plate 14 moves towards the return spring 17, thereby driving the connecting rod 25 to move simultaneously through the movable frame 16. When the connecting rod 25 moves to contact the limiting block 22, the connecting rod 25 will squeeze the limiting block 22, causing the limiting block 22 to move away from the connecting rod 25. When the connecting rod 25 moves to the lower end of the limiting block 22, the limiting block 22 moves towards the placement plate 14 under the elastic action of the limiting spring 24, so that the limiting block 22 is located at the upper end of the connecting rod 25, thereby limiting the connecting rod 25.

[0031] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A high-efficiency feeding device for SMT assembly, characterized in that: It includes two support frames (1), a conveyor belt (2) is provided at the middle top position of the two support frames (1), a plurality of bearing plates (3) are evenly provided at the top of the conveyor belt (2), a support column (4) is fixed at the four corner positions of the lower end of the bearing plate (3), the support column (4) is fixedly connected to the conveyor belt (2), a connecting block (10) is fixed at the middle position of the top of the bearing plate (3), a placement frame (7) is provided at the top of the bearing plate (3), a flipping shaft (8) is fixed at one end of the placement frame (7) near the connecting block (10), the flipping shaft (8) is rotatably connected to the connecting block (10), flipping components are provided on both sides of the flipping shaft (8) for flipping the placement frame (7), and a clamping component is provided on the inner side of the placement frame (7) for clamping and fixing the material.

2. The high-efficiency feeding device for SMT assembly according to claim 1, characterized in that: The flipping assembly includes a rack frame (5), which is fixed at the top middle position of the support frame (1). A fixed rack (6) is fixed at the bottom of the top of the rack frame (5). A rotating shaft (11) is arranged laterally on the inner middle side of the bearing plate (3) and at the position corresponding to the flipping shaft (8). The rotating shaft (11) is rotatably connected to the bearing plate (3). Both ends of the rotating shaft (11) extend to the outer side of the bearing plate (3). A drive gear (12) is fixed at one end of the rotating shaft (11) located on the outer side of the bearing plate (3). The drive gear (12) is meshed with the fixed rack (6). The rotating shaft (11) is connected to the flipping shaft (8) through a transmission assembly.

3. The high-efficiency feeding device for SMT assembly according to claim 2, characterized in that: The transmission assembly includes a reversing gear (9), which is fixed at the outer ends of the reversing shaft (8). A transmission gear (13) is fixed at the position corresponding to the reversing gear (9) on the rotating shaft (11), and the transmission gear (13) meshes with the reversing gear (9).

4. The high-efficiency feeding device for SMT assembly according to claim 1, characterized in that: The clamping assembly includes two placement plates (14), which are symmetrically arranged on the inner side of the placement frame (7). A movable frame (16) is fixed to the side of each placement plate (14) near the placement frame (7). The movable frame (16) extends to the inner side of the placement frame (7) and is slidably connected to the placement frame (7). A transmission rack (18) is fixed to the side of the movable frame (16) away from the placement plate (14). A position corresponding to the transmission rack (18) is located on the inner side of the placement frame (7). A connecting shaft (19) is rotatably connected. Driven gears (20) are fixed at both ends of the connecting shaft (19) and at positions corresponding to the transmission rack (18). The driven gears (20) mesh with the transmission rack (18). A connecting frame (21) is fixed on the middle outer side of the connecting shaft (19). A clamping plate (15) is fixed at the end of the connecting frame (21) away from the connecting shaft (19). A return spring (17) is fixed at the lower ends of both ends of the placement plate (14). The return spring (17) is fixedly connected to the placement frame (7).

5. The high-efficiency feeding device for SMT assembly according to claim 4, characterized in that: A connecting rod (25) is provided between the two movable frames (16), and both ends of the connecting rod (25) are fixedly connected to the two movable frames (16). A limit component is provided inside the placement frame (7) and below the connecting rod (25).

6. The high-efficiency feeding device for SMT assembly according to claim 5, characterized in that: The limiting component includes a limiting rod (23), which is longitudinally arranged inside the placement rack (7). The limiting rod (23) is slidably connected to the placement rack (7). A limiting block (22) is fixed to one end of the limiting rod (23) near the connecting rod (25). The top end of the limiting block (22) near the connecting rod (25) is set as an inclined surface. The end of the limiting rod (23) away from the limiting block (22) extends to the outside of the placement rack (7). A lifting handle (26) is fixed to one end of the limiting rod (23) located outside the placement rack (7). A limiting spring (24) is sleeved on the outside of one end of the limiting rod (23) near the limiting block (22). One end of the limiting spring (24) is fixedly connected to the limiting block (22), and the other end of the limiting spring (24) is fixedly connected to the placement rack (7).

Images