A pin positioning soldering device for LED light emitting diode light source packaging

Abstract

The application discloses a pin positioning and welding device for LED (Light Emitting Diode) light source packaging and relates to the technical field of diode production welding equipment. The device comprises a mounting base, a conveying belt body connected to the top of the mounting base and a welding table connected to the conveying belt body for welding. The device further comprises a placing groove plate connected to the conveying belt body, and one side of the placing groove plate is provided with a first transmission gear that can rotate intermittently. In the application, when the second transmission gear is engaged with the first transmission gear, the change of the rotating speed is from slow to fast. In the initial stage, the low rotating speed drives the limiting assembly to slowly move, gently fixes and straightens the fragile solder pin part close to the diode body, and avoids damage caused by too fast speed and too large force. With the increase of the rotating speed, the limiting assembly quickly straightens other parts of the solder pin. The setting effectively reduces the risk of solder pin damage and improves the performance and yield of the light emitting diode.

Description

Technical Field

[0001] This invention relates to the field of diode manufacturing welding equipment technology, specifically to a pin positioning welding device for LED light-emitting diode light source packaging. Background Technology

[0002] Light-emitting diodes (LEDs) are a common type of light-emitting device that releases light by recombination of electrons and holes. They are widely used in the lighting field. LEDs can efficiently convert electrical energy into light energy and have a wide range of applications in modern society, such as lighting, flat panel displays, and medical devices.

[0003] A Chinese patent (publication number: CN214625087U) discloses a pin positioning and welding device for LED light-emitting diode production, including a horizontally arranged table. Support legs are vertically welded at the four corners of the bottom surface of the table. Rollers are horizontally arranged at both ends of the upper width direction of the table. The same conveyor belt is sleeved on two of the rollers. Multiple placement plates are equidistantly bonded to the conveyor belt along its width direction. A placement groove is opened at one end of the upper part of the placement plate. A lower groove is opened at both ends of the upper part of the placement plate along the placement groove. A pushing component is provided on the placement plate to push the product in the placement groove to move horizontally. A pressing and moving mechanism that cooperates with the placement plate is provided on the upper part of the table.

[0004] The aforementioned equipment first places the diode to be soldered on a placement plate, then presses an upper pressure plate firmly against it. The diode is then positioned and bound using a circular hole integrally formed on the upper pressure plate and the placement plate. After positioning, a pusher plate pushes the diode to slide, at which point the circular hole straightens the diode's solder leads, facilitating subsequent soldering. However, the straightening of the solder leads in this equipment is not designed according to actual conditions. In actual production, during diode packaging, the solder leads near the diode body undergo multiple complex processes, such as injection molding and lead frame processing. During injection molding, the high-temperature molten plastic flows and fills the cavity in the mold, exerting significant impact and pressure on the solder leads, causing minor plastic deformation and residual stress. The solder leads near the diode body experience localized stress concentration, leading to damage and defects in the metal material at that location. Therefore, using a uniform straightening rate can easily damage the solder leads in this area, affecting diode performance and yield. Summary of the Invention

[0005] The purpose of this invention is to provide a pin positioning and soldering device for LED light-emitting diode light source packaging, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a pin positioning and soldering device for LED light-emitting diode (LED) light source packaging, comprising a mounting base, a conveyor belt body connected to the top of the mounting base, and a soldering station connected to the conveyor belt body for soldering.

[0007] A trough plate is placed and connected to the conveyor belt body. A first transmission gear, capable of intermittent rotation, is provided on one side of the trough plate. A second transmission gear is meshed with one side of the first transmission gear.

[0008] Both the first and second transmission gears are non-circular gears, and their tooth profiles are not uniformly distributed along the circumference. When the first transmission gear rotates clockwise along the axis, the speed of the second transmission gear changes from slow to fast.

[0009] A transmission screw is rotatably connected inside the placement slot plate. The transmission screw is coaxially arranged with the second transmission gear. A connecting nut is threaded onto the transmission screw, and a limiting component for fixing the welding foot is provided on the connecting nut.

[0010] Furthermore, a first mounting rack is connected to the conveyor belt body, and a first driven gear is coaxially arranged on one side of the first transmission gear. The first mounting rack meshes with the first driven gear.

[0011] The first driven gear moves synchronously with the conveyor belt body. When it moves to the predetermined position, the first mounting rack meshes with the first driven gear, driving the first driven gear to rotate.

[0012] Furthermore, the limiting component includes pneumatic grippers connected to both sides of the connecting nut, and the gripping ends of the pneumatic grippers are connected to two mutually symmetrical first connecting plates.

[0013] Furthermore, the limiting component also includes a mounting base connected to the top of the first connecting plate, a fixed base connected to the top of the mounting base, an elastic restraint strip rotatably connected to the fixed base, a second connecting plate connected to one side of the mounting base, a connecting frame connected to the second connecting plate, and a driving component for driving the elastic restraint strip to bend and fit against the welding foot is provided in the connecting frame.

[0014] Furthermore, the drive assembly includes a fixed rack connected to the connecting frame, a third transmission gear meshing with the fixed rack, a mounting bracket connected to the rear side of the third transmission gear, the mounting bracket slidably connected to the rear side of the connecting frame, a servo motor for driving the third transmission gear to rotate connected to the mounting bracket, a first bevel gear coaxially disposed on one side of the third transmission gear, a second bevel gear meshing with one side of the first bevel gear, a threaded rod connected to the second bevel gear, and a threaded cylinder meshing with the threaded rod.

[0015] When the threaded cylinder moves horizontally and vertically, it gradually comes into contact with the end of the elastic restraint strip, driving the elastic restraint strip to adhere to the diode's solder pads.

[0016] Furthermore, the end of the threaded cylinder away from the threaded rod extends to the outside of the connecting frame and is connected to a connecting seat. An abutment roller is rotatably connected to the connecting seat. A guide groove is provided on the elastic restraint strip, and the abutment roller is slidably connected in the guide groove.

[0017] Furthermore, a second mounting rack is connected inside the conveyor belt body. The second mounting rack is mirror-configured with the first mounting rack to drive the limit assembly back to its original position by rotating the transmission screw in the opposite direction.

[0018] Furthermore, an elastic wiping component is detachably connected between the two first connecting plates by screws, and a recycling port for collecting tin dross is provided on the placement tank plate, with a sealing cover plate inserted into one side of the placement tank plate.

[0019] Furthermore, a guide rod is connected to one side of the threaded cylinder, and the guide rod is slidably connected to the inner wall of the connecting frame. A first limiting groove for the guide rod to slide is provided in the connecting frame.

[0020] Furthermore, a limiting plate is connected to the top of the connecting nut, and the limiting plate is slidably connected in the placement groove plate, and a second limiting groove adapted to the limiting plate is opened in the placement groove plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. When the second transmission gear meshes with the first transmission gear, the rotational speed changes from slow to fast. In the initial stage, the low rotational speed drives the limiting component to move slowly, gently fixing and straightening the fragile solder joints near the diode body, avoiding damage caused by excessive speed or force. As the rotational speed increases, the limiting component quickly straightens other parts of the solder joints. This design effectively reduces the risk of solder joint damage and improves the performance and yield of the LED.

[0023] 2. The pneumatic grippers in the limiting assembly first clamp and fix the welding foot, and then the elastic restraint strip conforms to the welding foot under the action of the drive assembly. The drive assembly realizes the compound movement of the threaded cylinder through a combination of gear and rack transmission, bevel gear transmission and thread transmission, which drives the elastic restraint strip to bend in a way that conforms to the contour of the welding foot, applying fixing force to the welding foot from multiple directions. For fragile parts, it can achieve gentle and uniform conformation, ensuring the fixing effect while avoiding excessive local stress.

[0024] 3. The detachable elastic wiping component between the two connecting plates automatically wipes the solder dross on the placement tray. The wiped-off solder dross is collected through the recycling port, and the sealing cover prevents solder dross leakage. This setting eliminates the need for frequent manual cleaning and reduces the risk of solder dross residue affecting subsequent soldering and straightening operations. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a side view of the entire invention;

[0027] Figure 3 This is a plan view of the present invention;

[0028] Figure 4 This is a side view of the trough plate and the connection between it and the conveyor belt in this invention;

[0029] Figure 5 This is a front view of the slotted plate in this invention;

[0030] Figure 6 This is a rear view of the groove plate placed in this invention;

[0031] Figure 7 This is a top view of the slotted plate in this invention;

[0032] Figure 8 For the present invention Figure 4 Enlarged view of the structure at point A in the middle;

[0033] Figure 9 For the present invention Figure 2 Enlarged view of the structure at point B;

[0034] Figure 10 For the present invention Figure 4 Enlarged view of the structure at point C.

[0035] In the diagram: 1. Mounting base; 2. Conveyor belt body; 3. Welding table; 4. Placement trough plate; 5. First transmission gear; 6. Second transmission gear; 7. Transmission screw; 8. Connecting nut; 9. First mounting rack; 10. First driven gear; 11. Pneumatic gripper; 12. First connecting plate; 13. Mounting seat; 14. Connecting frame; 15. Fixed rack; 16. Third transmission gear; 17. Threaded rod; 18. Threaded cylinder; 19. Elastic restraint strip; 20. Connecting seat; 21. Abutment roller; 22. Guide groove; 23. Fixed seat; 24. Servo motor; 25. Guide rod; 26. Second mounting rack; 27. Limiting plate; 28. Elastic wiping component; 29. ​​Second connecting plate; 30. Recycling port; 31. First bevel gear; 32. Second bevel gear. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-10 This invention provides a technical solution: a pin positioning and soldering device for LED light-emitting diode (LED) light source packaging, comprising a mounting base 1, a conveyor belt body 2 connected to the top of the mounting base 1, and a soldering table 3 connected to the conveyor belt body 2 for soldering.

[0038] A placement trough plate 4 is connected to the conveyor belt body 2. A first transmission gear 5, capable of intermittent rotation, is provided on one side of the placement trough plate 4. A second transmission gear 6 is meshed with one side of the first transmission gear 5.

[0039] Both the first transmission gear 5 and the second transmission gear 6 are non-circular gears, and their tooth profiles are not uniformly distributed along the circumference. When the first transmission gear 5 rotates clockwise along the axis, the speed of the second transmission gear 6 changes from slow to fast.

[0040] A transmission screw 7 is rotatably connected inside the placement slot plate 4. The transmission screw 7 is coaxially arranged with the second transmission gear 6. A connecting nut 8 is threaded onto the transmission screw 7. A limiting component for fixing the welding foot is provided on the connecting nut 8.

[0041] It should be noted that during the initial rotation stage of the first transmission gear 5, its tooth profile has a small and dense tooth pitch, a low tooth tip height, and a high tooth root height, which makes the second transmission gear 6 have a short force arm and a low speed during meshing.

[0042] As the first transmission gear 5 rotates, the tooth pitch of the tooth profile gradually increases and the tooth distribution becomes more sparse, the tooth tip height increases and the tooth root height decreases, the force arm of the second transmission gear 6 becomes longer and the rotation speed increases.

[0043] In practice, the LED to be welded is placed on the placement slot plate 4. When the device starts working, the first transmission gear 5 starts to rotate. Through meshing with the second transmission gear 6, it drives the second transmission gear 6 to rotate, which in turn drives the transmission screw 7 coaxial with the second transmission gear 6 to rotate. The connecting nut 8 on the transmission screw 7 moves linearly under the action of the screw. The limiting component on the connecting nut 8 fixes and straightens the welding feet of the LED to facilitate subsequent welding on the welding table 3.

[0044] Based on this, during the initial rotation phase of the first transmission gear 5, due to its small and densely distributed tooth pitch, low addendum, and high dedendum, the second transmission gear 6 has a short lever arm when meshing with it. According to the lever principle, under the same force, the shorter the lever arm, the smaller the torque generated, resulting in a lower rotational speed of the second transmission gear 6. At this time, the limiting component moves slowly, gently fixing and straightening the relatively fragile solder joints near the diode body to avoid damage to the solder joints due to excessive speed or force. As the first transmission gear 5 continues to rotate, its tooth pitch gradually increases and becomes more sparse, the addendum increases, and the dedendum decreases. When meshing with the second transmission gear 6, the lever arm of the second transmission gear 6 becomes longer, and under the same force, the torque increases, thereby increasing the rotational speed of the second transmission gear 6. The increased movement speed of the limiting component allows for rapid straightening of other, less fragile parts of the solder joints, improving overall straightening efficiency. This design enables low-speed transmission in the initial stage, allowing the limiting component to slowly and gently straighten some fragile solder joints, reducing the risk of solder joint damage and effectively improving the performance and yield of the LED.

[0045] Please see Figure 1-10 A first mounting rack 9 is connected to the conveyor belt body 2. A first driven gear 10 is coaxially arranged on one side of the first transmission gear 5. The first mounting rack 9 and the first driven gear 10 are meshed and connected.

[0046] The first driven gear 10 moves synchronously with the conveyor belt body 2. When it moves to the predetermined position, the first mounting rack 9 meshes with the first driven gear 10, driving the first driven gear 10 to rotate.

[0047] In specific implementation, a first mounting rack 9 is connected to the conveyor belt body 2, and a first driven gear 10 on one side of the first transmission gear 5 moves synchronously with the conveyor belt body 2. When it moves to a predetermined position, the first mounting rack 9 and the first driven gear 10 mesh with each other. The first mounting rack 9 remains stationary, and the first driven gear 10 begins to rotate under the meshing action, thereby driving the coaxial first transmission gear 5 to rotate. This arrangement realizes the automatic rotation of the first transmission gear 5 through the meshing of the first mounting rack 9 and the first driven gear 10.

[0048] Please see Figure 1-10 The limiting component includes pneumatic grippers 11 connected to both sides of the connecting nut 8, and the gripping ends of the pneumatic grippers 11 are connected to two symmetrical first connecting plates 12.

[0049] It should be noted that a position sensor can be installed inside the placement slot plate 4 and electrically connected to the pneumatic gripper 11. When the connecting nut 8 moves, the position sensor triggers a switch to drive the pneumatic gripper 11.

[0050] A photoelectric sensor is installed at a suitable position on the welding station 3. When the light-emitting diode moves to the welding station 3 with the conveyor belt body 2 and completes the welding process, the position sensor detects that the diode has left a specific position in the welding area and generates a corresponding electrical signal. This signal is transmitted to the control system, which controls the air reversing valve of the pneumatic gripper 11 to change the airflow direction, allowing compressed air to enter from the release chamber of the pneumatic gripper 11, driving the gripper to open, thereby releasing the fixation of the welding foot.

[0051] In practice, a position sensor installed inside the placement slot 4 monitors the position of the connecting nut 8 in real time. When the connecting nut 8 moves to a preset specific position, the position sensor detects this position change and generates a corresponding electrical signal. This electrical signal triggers a switch electrically connected to it. After the switch closes, it controls the air passage of the pneumatic gripper 11 to open. Compressed air enters the pneumatic gripper 11, driving it to move and bring the two symmetrical first connecting plates 12 connected to its clamping end closer together, thereby clamping and fixing the solder feet of the light-emitting diode for subsequent straightening and welding operations.

[0052] Please see Figure 1-10 The limiting component also includes a mounting base 13 connected to the top of the first connecting plate 12. A fixed base 23 is connected to the top of the mounting base 13. An elastic restraint strip 19 is rotatably connected to the fixed base 23. A second connecting plate 29 is connected to one side of the mounting base 13. A connecting frame 14 is connected to the second connecting plate 29. A driving component for driving the elastic restraint strip 19 to bend and fit against the welding foot is provided inside the connecting frame 14.

[0053] In practice, after the mounting base 13 moves to the appropriate position along with the first connecting plate 12, the driving component begins to operate. The action of the driving component generates a corresponding driving force, causing the elastic restraint strip 19, which is rotatably connected to the fixed base 23, to bend. Because the elastic restraint strip 19 itself has a certain degree of elasticity, under the action of the driving component, it gradually changes shape and eventually adheres to the solder pads of the light-emitting diode. The driving component controls the degree of bending of the elastic restraint strip 19 according to the actual situation to ensure that it can adapt to solder pads of different sizes and states, achieving a tight and stable fit.

[0054] Please see Figure 1-10The drive assembly includes a fixed rack 15 connected within the connecting frame 14, a third transmission gear 16 meshing with the fixed rack 15, a mounting bracket connected to the rear side of the third transmission gear 16, the mounting bracket being slidably connected to the rear side of the connecting frame 14, a servo motor 24 for driving the third transmission gear 16 to rotate connected to the mounting bracket, a first bevel gear 31 coaxially disposed on one side of the third transmission gear 16, a second bevel gear 32 meshing with one side of the first bevel gear 31, a threaded rod 17 connected to the second bevel gear 32, and a threaded cylinder 18 meshing with the threaded rod 17.

[0055] When the threaded cylinder 18 moves horizontally and vertically, it can gradually come into contact with the end of the elastic restraint strip 19, driving the elastic restraint strip 19 to adhere to the solder feet of the diode.

[0056] In practice, when it is necessary to fix the diode solder joints, the servo motor 24 starts, driving the third transmission gear 16 to rotate. Since the third transmission gear 16 meshes with the fixed rack 15, as the third transmission gear 16 rotates, it causes the mounting bracket to slide vertically along the rear side of the connecting frame 14.

[0057] Simultaneously, the first bevel gear 31, coaxially arranged with the third transmission gear 16, rotates synchronously. The first bevel gear 31 transmits power to the second bevel gear 32 through meshing. The second bevel gear 32 drives the threaded rod 17 to rotate. Since the threaded rod 17 and the threaded cylinder 18 are threadedly engaged, the threaded cylinder 18 can move synchronously in both vertical and horizontal directions.

[0058] As the threaded cylinder 18 moves horizontally and vertically, it gradually comes into contact with the end of the elastic restraint strip 19. Since the elastic restraint strip 19 is rotatably connected to the fixed base 23, the continuous movement of the threaded cylinder 18 applies a force to the elastic restraint strip 19, causing it to bend and deform around the fixed base 23, ultimately fitting against the diode's solder pads. This further stabilizes and secures the solder pads. The combined movement of the threaded cylinder 18 in this configuration allows the elastic restraint strip 19 to bend in a way that better conforms to the contour of the solder pads. Compared to simple linear drive, this allows for the application of fixing force to the solder pads from multiple directions. Especially for the fragile solder pad areas near the diode body, the movement of the threaded cylinder 18 can be controlled to ensure that the elastic restraint strip 19 fits gently and evenly, guaranteeing the fixing effect while avoiding damage to the solder pads due to excessive localized force.

[0059] Please see Figure 1-10 The threaded cylinder 18 extends to the outside of the connecting frame 14 at one end away from the threaded rod 17 and is connected to the connecting seat 20. The connecting seat 20 is rotatably connected to the abutment roller 21. The elastic restraint strip 19 is provided with a guide groove 22, and the abutment roller 21 is slidably connected in the guide groove 22.

[0060] In practice, the cooperation between the anti-roller 21 and the guide groove 22 reduces the friction between the threaded cylinder 18 and the elastic restraint strip 19, making the bending process of the elastic restraint strip 19 smoother.

[0061] Please see Figure 1-10 The conveyor belt body 2 is connected to a second mounting rack 26, which is mirrored with the first mounting rack 9 to drive the limit assembly to return to its original position by rotating the transmission screw 7 in the opposite direction.

[0062] In practice, when the conveyor belt body 2 continues to move to a certain position, the first driven gear 10 meshes with the second mounting rack 26, causing the first driven gear 10 to rotate in the opposite direction, which in turn drives the transmission screw 7 to rotate in the opposite direction, driving the limit assembly to return to its original position.

[0063] Please see Figure 1-10 An elastic wiping element 28 is detachably connected between the two first connecting plates 12 by screws. A recycling port 30 for collecting tin dross is opened on the placement tank plate 4. A sealing cover plate is inserted into one side of the placement tank plate 4.

[0064] In practice, when the limiting component moves, the elastic wiping member 28 can wipe away the solder dross on the placement tray 4. The collection port 30 on the placement tray 4 is used to collect the wiped-off solder dross, and the sealing cover can prevent solder dross leakage.

[0065] Please see Figure 1-10 A guide rod 25 is connected to one side of the threaded cylinder 18. The guide rod 25 is slidably connected to the inner wall of the connecting frame 14. A first limiting groove is provided in the connecting frame 14 for the guide rod 25 to slide.

[0066] In practice, when the threaded cylinder 18 moves under the drive of the threaded rod 17, the guide rod 25 plays a guiding and limiting role, improving the stability of the movement of the threaded cylinder 18.

[0067] Please see Figure 1-10 The top of the connecting nut 8 is connected to a limiting plate 27, which is slidably connected in the placement groove plate 4. The placement groove plate 4 has a second limiting groove that is adapted to the limiting plate 27.

[0068] In practice, when the connecting nut 8 moves under the drive of the transmission screw 7, the limiting plate 27 plays a guiding and limiting role to prevent the connecting nut 8 from deviating during the movement.

[0069] Working principle: The LED to be welded is placed in the placement slot 4 connected to the conveyor belt body 2. The placement slot 4 moves synchronously with the conveyor belt body 2. The conveyor belt body 2 is equipped with a first mounting rack 9, and a first driven gear 10 coaxially mounted on one side of the first transmission gear 5 moves synchronously with the conveyor belt body 2. When it moves to the predetermined position, the first mounting rack 9 and the first driven gear 10 mesh with each other. Since the first mounting rack 9 is fixed, the first driven gear 10 starts to rotate under the meshing action, thereby driving the coaxial first transmission gear 5 to rotate. Subsequently, the second transmission gear 6 rotates synchronously. Since both the first transmission gear 5 and the second transmission gear 6 are non-circular gears, their tooth profiles are not uniformly distributed along the circumference. When the first transmission gear 5 rotates clockwise, in the initial stage of its meshing: because the tooth profile and pitch of the first transmission gear 5 are small and densely distributed, the tooth tip height is low and the tooth root height is high, when it meshes with the second transmission gear 6, the lever arm of the second transmission gear 6 is short. According to the lever principle, under the same force, the torque is small and the speed is low. As the first transmission gear 5 continues to rotate, its tooth profile and pitch gradually increase, the tooth distribution becomes sparser, the tooth tip height increases, and the tooth root height decreases. When it meshes with the second transmission gear 6, the lever arm of the second transmission gear 6 becomes longer, the torque increases, and the speed increases.

[0070] The second transmission gear 6 is coaxial with the transmission screw 7, and the rotation of the second transmission gear 6 drives the transmission screw 7 to rotate. The connecting nut 8 on the transmission screw 7 moves linearly, and the position sensor in the slot plate 4 monitors the position of the connecting nut 8. When the connecting nut 8 moves to the preset position, the position sensor detects the position change and generates an electrical signal, triggering the switch electrically connected to it. The pneumatic gripper 11 is activated, causing the two first connecting plates 12 connected to the clamping end to move closer to each other, clamping and fixing the solder feet of the light-emitting diode; at the same time, after the mounting base 13 moves to the appropriate position with the first connecting plate 12, the drive assembly starts working, the servo motor 24 starts, and drives the third transmission gear 16 to rotate. Since the third transmission gear 16 meshes with the fixed rack 15, it rotates while driving the mounting frame to slide vertically along the rear side of the connecting frame 14;

[0071] The first bevel gear 31, which is coaxial with the third transmission gear 16, rotates synchronously and transmits power to the second bevel gear 32 through meshing with it, thereby driving the threaded rod 17 to rotate.

[0072] The threaded rod 17 is threadedly engaged with the threaded cylinder 18, enabling the threaded cylinder 18 to move synchronously in both vertical and horizontal directions;

[0073] The abutment roller 21 on the end connector 20 of the threaded cylinder 18 slides within the guide groove 22 of the elastic restraint strip 19, reducing friction. The continuous movement of the threaded cylinder 18 applies force to the elastic restraint strip 19, causing it to bend and deform around the fixing seat 23, ultimately fitting against the diode's solder feet for further secure fixation. During the movement of the connecting nut 8, due to the speed-changing transmission of the first transmission gear 5 and the second transmission gear 6, the limiting component first moves slowly, gently fixing and straightening the more fragile solder feet near the diode body to avoid damage. Then, the movement speed increases, quickly straightening other parts of the solder feet, improving overall straightening efficiency. After straightening, the LED moves with the conveyor belt body 2 to the welding table 3 for welding.

[0074] A photoelectric sensor installed at a suitable position on the welding station 3 generates an electrical signal and transmits it to the control system when it detects that the light-emitting diode has completed the welding process and left a specific position in the welding area. The control system controls the pneumatic gripper 11 to open the drive gripper and release the fixing of the welding foot; when the conveyor belt body 2 continues to move to a certain position, the first driven gear 10 meshes with the second mounting rack 26. Since the second mounting rack 26 is mirrored with the first mounting rack 9, the first driven gear 10 rotates in the opposite direction, driving the transmission screw 7 to rotate in the opposite direction, driving the limit component to return to its original position, preparing for the next operation; during the movement of the limit component, the elastic wiping member 28, which is detachably connected between the two first connecting plates 12, wipes the solder dross on the placement tray 4. The collection port 30 on the placement tray 4 collects the wiped solder dross, and the sealing cover prevents solder dross leakage.

Claims

1. A pin positioning and soldering device for LED light-emitting diode (LED) light source packaging, comprising a mounting base (1), a conveyor belt body (2) connected to the top of the mounting base (1), and a soldering station (3) connected to the conveyor belt body (2) for soldering, characterized in that, include, A placement trough plate (4) is connected to the conveyor belt body (2). A first transmission gear (5) that can rotate intermittently is provided on one side of the placement trough plate (4). A second transmission gear (6) is meshed with one side of the first transmission gear (5). Both the first transmission gear (5) and the second transmission gear (6) are non-circular gears with non-uniform tooth profiles along the circumference. When the first transmission gear (5) rotates clockwise along the axis, the speed of the second transmission gear (6) changes from slow to fast. A transmission screw (7) is rotatably connected inside the placement slot plate (4). The transmission screw (7) is coaxially arranged with the second transmission gear (6). A connecting nut (8) is threaded onto the transmission screw (7). A limiting component for fixing the solder feet is provided on the connecting nut (8). The limiting component moves slowly at low speed to gently fix and straighten the fragile solder feet near the diode body. As the speed increases, the limiting component quickly straightens the other parts of the solder feet. The limiting assembly includes pneumatic grippers (11) connected to both sides of the connecting nut (8), and the gripping ends of the pneumatic grippers (11) are connected to two mutually symmetrical first connecting plates (12); The limiting component also includes a mounting base (13) connected to the top of the first connecting plate (12). A fixed base (23) is connected to the top of the mounting base (13). An elastic restraint strip (19) is rotatably connected to the fixed base (23). A second connecting plate (29) is connected to one side of the mounting base (13). A connecting frame (14) is connected to the second connecting plate (29). A driving component for driving the elastic restraint strip (19) to bend and fit against the welding foot is provided inside the connecting frame (14).

2. The lead positioning and soldering device for LED light-emitting diode light source packaging as described in claim 1, characterized in that: A first mounting rack (9) is connected to the conveyor belt body (2), and a first driven gear (10) is coaxially arranged on one side of the first transmission gear (5). The first mounting rack (9) and the first driven gear (10) are meshed and connected. The first driven gear (10) moves synchronously with the conveyor belt body (2). When it moves to the predetermined position, the first mounting rack (9) meshes with the first driven gear (10) to drive the first driven gear (10) to rotate.

3. The lead positioning and soldering device for LED light-emitting diode light source packaging as described in claim 1, characterized in that: The drive assembly includes a fixed rack (15) connected within a connecting frame (14), a third transmission gear (16) meshing with the fixed rack (15), a mounting bracket connected to the rear side of the third transmission gear (16), the mounting bracket being slidably connected to the rear side of the connecting frame (14), a servo motor (24) for driving the third transmission gear (16) to rotate connected to the mounting bracket, a first bevel gear (31) coaxially disposed on one side of the third transmission gear (16), a second bevel gear (32) meshing with one side of the first bevel gear (31), a threaded rod (17) connected to the second bevel gear (32), and a threaded cylinder (18) meshing with the threaded rod (17). When the threaded cylinder (18) moves horizontally and vertically, it can gradually come into contact with the end of the elastic restraint strip (19), driving the elastic restraint strip (19) to adhere to the diode's solder pads.

4. The lead positioning and soldering device for LED light-emitting diode light source packaging as described in claim 3, characterized in that: The threaded cylinder (18) extends to the outside of the connecting frame (14) at one end away from the threaded rod (17) and is connected to a connecting seat (20). An abutment roller (21) is rotatably connected to the connecting seat (20). A guide groove (22) is provided on the elastic restraint strip (19), and the abutment roller (21) is slidably connected in the guide groove (22).

5. The lead positioning and soldering device for LED light-emitting diode light source packaging as described in claim 2, characterized in that: The conveyor belt body (2) is internally connected to a second mounting rack (26), which is mirrored with the first mounting rack (9) to drive the limit assembly to return to its original position by rotating the transmission screw (7) in the opposite direction.

6. The lead positioning and soldering device for LED light-emitting diode light source packaging as described in claim 1, characterized in that: Two first connecting plates (12) are detachably connected by screws to an elastic wiping element (28). The placement tank plate (4) is provided with a recycling port (30) for collecting tin dross. A sealing cover plate is inserted into one side of the placement tank plate (4).

7. The lead positioning and soldering device for LED light-emitting diode light source packaging as described in claim 3, characterized in that: A guide rod (25) is connected to one side of the threaded cylinder (18). The guide rod (25) is slidably connected to the inner wall of the connecting frame (14). A first limiting groove is provided in the connecting frame (14) for the guide rod (25) to slide.

8. The lead positioning and soldering device for LED light-emitting diode light source packaging as described in claim 1, characterized in that: The top of the connecting nut (8) is connected to a limiting plate (27), which is slidably connected in the placement groove plate (4). The placement groove plate (4) is provided with a second limiting groove that is compatible with the limiting plate (27).

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