High-speed feeding equipment for LED production

Abstract

The utility model belongs to the technical field of LED feeding, and provides high-speed feeding equipment for LED production, which comprises a machine table, a rotating wheel is arranged in the middle of the upper end of the machine table, a center shaft is fixedly connected to the circle center of the rotating wheel, and a plurality of electric push rods are fixedly connected to the periphery of the rotating wheel; the two LED pins are respectively and accurately in full contact with the two test electrodes, the phenomena of wrong test, side leakage and the like of the LEDs are avoided, accurate power-on test on each LED can be completed before feeding and conveying, so that each LED fed and conveyed out can be normally powered on and used, the righting and testing processes and the feeding process are carried out in parallel, and the production efficiency is improved. The LED feeding device is suitable for feeding LEDs of various shapes, sizes, models and specifications, the feeding function is diversified, the working procedures are integrated and optimized, time is saved, the production speed is increased, the production efficiency is improved, and the production cost is reduced. The problems that an existing LED feeding device is inconvenient to centralize LED pins, the pins are difficult to make accurate contact with test electrodes, and the feeding efficiency is reduced are solved.

Description

Technical Field

[0001] This utility model belongs to the field of LED feeding technology and provides a high-speed feeding device for LED production. Background Technology

[0002] A light-emitting diode, or LED for short, is a commonly used light-emitting device. It emits light through the recombination of electrons and holes. It is widely used in lighting, efficiently converting electrical energy into light energy, and has numerous applications in modern society, such as lighting, flat panel displays, signal indicators, and medical devices. Like ordinary diodes, LEDs consist of a PN junction and exhibit unidirectional conductivity. When a forward voltage is applied to an LED, holes injected from the P-region into the N-region and electrons injected from the N-region into the P-region recombine with electrons and holes in the N-region and P-region, respectively, within a few micrometers of the PN junction, producing spontaneous fluorescence. Different semiconductor materials have different energy states for electrons and holes, resulting in varying amounts of energy released during recombination. The more energy released, the shorter the wavelength of the emitted light. Commonly used LEDs emit red, green, or yellow light. The reverse breakdown voltage of an LED is greater than 5 volts. Its forward current-voltage characteristic curve is very steep, requiring a current-limiting resistor in series to control the current flowing through the diode. In the production of various electrical equipment, high-speed feeding equipment is needed to quickly transfer multiple LEDs to multiple PCB printed circuit boards in large quantities, so that the LEDs can be soldered and assembled into the circuit of the PCB printed circuit board.

[0003] LEDs need to be tested to ensure good conductivity before they can be loaded. Before loading, a preliminary process is required to test each LED. Due to the limited space of the equipment, LEDs of different shapes, sizes, and specifications are subject to different testing conditions. Sometimes the LED pins are crooked or the pin spacing is inconsistent, making it difficult for the pins to make accurate and sufficient contact with the test electrodes, which can easily lead to inaccurate LED testing. Before testing, additional equipment needs to be configured to pre-align the LED pins. For some special shapes, sizes, and specifications of LEDs, the pin positions are different, and the LED pin positions also need to be adjusted in advance. This makes the process scattered, the loading function limited and singular, and reduces loading efficiency, which is not conducive to improving production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and solve the problem that the existing LED feeding device is not convenient for aligning the LED pins, making it difficult for the pins to make accurate contact with the test electrodes, thus reducing the feeding efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a high-speed feeding device for LED production, including a machine base, a rotating wheel is provided in the middle of the upper part of the machine base, a central shaft is fixedly connected to the center of the rotating wheel, a plurality of electric push rods are fixedly connected around the rotating wheel, and a vacuum suction cup is fixedly connected to the lower end of each electric push rod.

[0006] The upper part of the machine platform and adjacent to any side of the turntable are arranged in sequence with a feeding cylinder, a test seat, a first straightening turntable, a second straightening turntable and a reversing turntable. The upper end of the reversing turntable has a protrusion integrally formed, and a pair of test electrodes are installed on the upper end of the test seat.

[0007] The upper end of the first straightening turntable is connected to multiple first jaws via mechanical transmission, and the inner ends of each of the first jaws are connected to multiple first clamping fixtures via mechanical transmission.

[0008] The second straightening turntable is mechanically connected to multiple second jaws, and the inner ends of the second jaws are all mechanically connected to multiple second clamping fixtures.

[0009] In a preferred embodiment of this invention, a control panel is installed at any corner of the upper part of the machine platform.

[0010] In a preferred embodiment of this invention, a first motor is connected to the lower end of the central shaft, and the lower end of the first motor is fixedly connected to the upper end of the machine platform.

[0011] In a preferred embodiment of this invention, the upper end of each electric push rod is provided with a first vacuum port that communicates with the interior of the adjacent vacuum suction cup, and a second vacuum port is provided around the upper end of the central shaft. A flexible hose is connected between the first vacuum port and the second vacuum port via a flange.

[0012] In a preferred embodiment of this invention, a feeding rail and a hopper are mechanically connected to the upper end of the machine platform and adjacent to any side of the rotating wheel. A vibratory feeder is mechanically connected to the end of the feeding rail away from the rotating wheel. The lower end of the vibratory feeder is fixedly connected to the upper end of the machine platform. A hopper is installed around the rotating wheel and adjacent to any side of the vibratory feeder.

[0013] In a preferred embodiment of this invention, the end of the reversing turntable away from the turntable is connected to a second motor via a synchronous belt drive, and the lower end of the second motor is fixedly connected to the upper end of the machine platform.

[0014] In a preferred embodiment of this invention, a third motor is driven to the lower end of the second straightening turntable, and the lower end of the third motor is fixedly connected to the upper end of the machine platform. A fourth motor is driven to the lower end of the first straightening turntable, and the lower end of the fourth motor is fixedly connected to the upper end of the machine platform.

[0015] In a preferred embodiment of this invention, a feeding track is installed on the upper part of the machine platform and adjacent to the side of the turntable, and the feeding track is mechanically connected to the feeding cylinder.

[0016] In a preferred embodiment of this utility model, the feeding track has multiple guide grooves inside, and the upper end of the feeding track is covered with multiple protective plates. Multiple sensors installed on the upper end of the feeding track are arranged between two adjacent protective plates. Multiple through holes that match and are aligned with the shape of the sensors are opened on the surface of the protective plates, and the ends of the sensors extend into the interior of adjacent through holes.

[0017] In a preferred embodiment of this invention, multiple air extraction ports are installed around the periphery of the feeding track, and a vibrator is installed at the lower end of the feeding track.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0019] The first motor drives the central shaft drive wheel to rotate on the upper part of the machine platform. The rotating wheel simultaneously drives multiple electric push rods to revolve around the central shaft. By rotating the wheel, the position of each electric push rod is switched, thereby driving the corresponding vacuum suction cup to revolve around the central shaft and switch positions. This allows each vacuum suction cup to pick up each LED in turn and place it sequentially into the first straightening turntable, the second straightening turntable, and the reversing turntable. This straightens the LED pins, aligns them, and adjusts the spacing and position of the LED pins to ensure that each LED pin makes precise and full contact with the two test electrodes, avoiding mistesting or missing tests. It can complete the accurate power-on test of each LED before feeding, ensuring that each LED fed out can be powered on and used normally. The straightening and testing processes are performed in parallel with the feeding process. It is suitable for feeding LEDs of various shapes, sizes, and specifications. The feeding function is diversified, the process is integrated and optimized, which helps to save time, speed up production, and improve production efficiency. Attached Figure Description

[0020] Figure 1 This is a left view of the overall structure of this utility model;

[0021] Figure 2 This is a partial enlarged view of structure A of this utility model;

[0022] Figure 3 This is a right view of the overall structure of this utility model;

[0023] Figure 4 This is a partial enlarged view of structure B of this utility model;

[0024] Figure 5 This is a left view of the feeding track of this utility model;

[0025] Figure 6 This is a right view of the feeding track of this utility model;

[0026] Figure 7 This is a schematic diagram of the internal structure of the feeding track of this utility model.

[0027] In the diagram: 1. Machine base; 2. Control panel; 3. Hopper; 4. Rotary wheel; 5. First vacuum port; 6. Central shaft; 7. Vacuum suction cup; 8. Second vacuum port; 9. Electric push rod; 10. First motor; 11. First straightening turntable; 12. First chuck; 13. First clamping fixture; 14. Reversing turntable; 15. Second motor; 16. Protrusion; 17. Feeding cylinder; 18. Test seat; 19. Test electrode; 20. Second straightening turntable; 21. Second chuck; 22. Second clamping fixture; 23. Third motor; 24. Fourth motor; 25. Feeding rail; 26. Vibratory feeder; 27. Feeding track; 28. Air extraction port; 29. ​​Vibrator; 30. Sensor; 31. Protective plate; 32. Guide chute. Detailed Implementation

[0028] Please see Figure 1-7 This utility model provides a technical solution: a high-speed feeding device for LED production, including a machine base 1. A rotating wheel 4 is arranged in the middle of the upper end of the machine base 1. A central shaft 6 is fixedly connected to the center of the rotating wheel 4. Multiple electric push rods 9 are fixedly connected around the rotating wheel 4. Vacuum suction cups 7 are fixedly connected to the lower end of each electric push rod 9. A feeding cylinder 17, a test seat 18, a first straightening turntable 11, a second straightening turntable 20, and a reversing turntable 14 are arranged sequentially on the upper end of the machine base 1 and adjacent to any side of the rotating wheel 4. The upper end of the reversing turntable 14 has an integrally formed protrusion 16. A pair of test electrodes 19 are installed on the upper end of the test seat 18. A feeding rail 25 and a hopper 3 are mechanically connected to the upper end of the machine base 1 and adjacent to any side of the rotating wheel 4. A vibratory feeder 26 is mechanically connected to the end of the feeding rail 25 away from the rotating wheel 4. The lower end of the vibratory feeder 26 is fixedly connected to the upper end of the machine base 1. A hopper 3 is installed around the rotating wheel 4 and adjacent to any side of the vibratory feeder 26. A control panel 2 is installed at any corner of the upper end of the machine base 1. The control panel 2 can be used to control the operation of the entire feeding equipment. The LED is placed inside the hopper 3, which is suspended directly above the vibratory feeder 26. The hopper 3 is used to collect and drop the LED into the vibratory feeder 26. The vibratory feeder 26 vibrates regularly and periodically to feed the LED into the feeding rail 25. The feeding rail 25 has a long and narrow space that can only accommodate LEDs in a single row. The LEDs move one by one inside the feeding rail 25 to the other end of the feeding rail 25 near the rotating wheel 4. The LEDs approach each vacuum suction cup 7 of the rotating wheel 4 one by one so that the vacuum suction cup 7 can grab the LEDs.

[0029] The lower end of the central shaft 6 is connected to a first motor 10, and the lower end of the first motor 10 is fixedly connected to the upper end of the machine base 1. The first motor 10 causes the central shaft 6 to drive the rotating wheel 4 to rotate on the upper end of the machine base 1. The rotating wheel 4 will simultaneously drive multiple electric push rods 9 to revolve around the central shaft 6. Multiple vacuum suction cups 7 and multiple electric push rods 9 revolve around the central shaft 6 at the same time. By rotating the rotating wheel 4, the position of each electric push rod 9 is switched, so as to drive the corresponding vacuum suction cup 7 to revolve around the central shaft 6 in turn to switch positions, so that each vacuum suction cup 7 can contact each LED conveyed from the feeding rail 25 in turn.

[0030] Each electric push rod 9 has a first vacuum port 5 at its upper end that communicates with the interior of the adjacent vacuum suction cup 7. A second vacuum port 8 is provided around the upper end of the central shaft 6. A flexible hose is connected between the first vacuum port 5 and the second vacuum port 8 via a flange. The vacuum suction cup 7 is connected to a vacuum pump via the flexible hose between the first vacuum port 5 and the adjacent second vacuum port 8. The vacuum pump can be installed inside the machine base 1. The vacuum pump generates a "negative pressure" suction force on the corresponding vacuum suction cup 7 by following the flexible hose between the first vacuum port 5 and the adjacent second vacuum port 8. The vacuum suction cup 7 picks up each LED that is conveyed from the feeding rail 25 one by one as the rotating wheel 4 rotates. Each LED is suspended by the vacuum suction cup 7 around the rotating wheel 4. Each vacuum suction cup 7 picks up and holds one LED and revolves around the central shaft 6 as the rotating wheel 4 rotates. The LED passes one by one above the first straightening rotating plate 11, the second straightening rotating plate 20, the reversing rotating plate 14, the test electrode 19, and the feeding cylinder 17.

[0031] Each electric push rod 9 controls the corresponding vacuum suction cup 7 to move up and down, allowing each vacuum suction cup 7 to move away from and closer to the first straightening turntable 11, the second straightening turntable 20, the reversing turntable 14, the test electrode 19, and the loading cylinder 17. The rotating wheel 4 rotates intermittently, allowing each vacuum suction cup 7 to revolve intermittently around the central axis 6. The electric control vacuum suction cup 7 adsorbs and releases LEDs. Each vacuum suction cup 7 is equipped with a matching infrared sensor that uses the infrared ranging principle to sense the position of the LED. When the LED approaches the first straightening turntable 11, the second straightening turntable 20, the reversing turntable 14, the test electrode 19, and the loading cylinder 17, it will be detected by the corresponding sensor. The sensor will de-energize the vacuum suction cup 7 and release the LED. The vacuum suction cup 7 will then sequentially place the LED above the first straightening turntable 11, the second straightening turntable 20, the reversing turntable 14, the test electrode 19, and the loading cylinder 17.

[0032] The upper end of the first straightening turntable 11 is mechanically connected to multiple first jaws 12. The inner ends of each first jaw 12 are mechanically connected to multiple first clamping fixtures 13. When the vacuum suction cup 7 places the LED onto the first straightening turntable 11, the first jaws 12 move on the turntable 11 via hydraulic drive. The four first jaws 12 cause the corresponding four first clamping fixtures 13 to press against the periphery of the LED, thus fixing the LED on the first straightening turntable 11 and placing it in the center of the turntable 11. This adjusts the LED's position so that it is aligned directly below the vacuum suction cup 7. The lower end of the first straightening turntable 11 is connected to a fourth motor 24, which is fixedly connected to the upper end of the machine base 1. The fourth motor 24 drives the first straightening turntable 11 to rotate, thereby adjusting the orientation of the LED and changing its clamping posture to facilitate the placement of the LED. The vacuum suction cup 7 is re-energized and holds the LED, making close contact between the LED and the center of the vacuum suction cup 7. This allows the vacuum suction cup 7 to grasp the LED and place it onto the reversing turntable 14. The first straightening turntable 11 straightens the LED, allowing the vacuum suction cup 7 to place the LED onto the reversing turntable 14. The end of the reversing turntable 14 away from the rotating wheel 4 is connected to the second motor 15 via a synchronous belt drive. The lower end of the second motor 15 is fixedly connected to the upper end of the machine base 1. The second motor 15 drives the reversing turntable 14 to rotate, rotating the reversing turntable 14 180 degrees relative to the LED's placement position. The reversing turntable 14 reverses the positive and negative terminals of the LED's pins, so that the LED pins grasped by the vacuum suction cup 7 correspond to the positive and negative terminals of the test electrode 19. At the same time, the protrusion 16 spreads and straightens the multiple pins of the LED, adjusting the pin spacing and arranging the multiple pins of the LED neatly to avoid messiness.

[0033] The lower end of the second straightening turntable 20 is connected to a third motor 23, which is fixedly connected to the upper end of the machine base 1. The third motor 23 drives the second straightening turntable 20 to rotate. Similarly, the working principle of the second straightening turntable 20 is the same as that of the first straightening turntable 11, and the function of the second straightening turntable 20 is the same as that of the first straightening turntable 11. The second straightening turntable 20 is mechanically connected to multiple second jaws 21, and the inner end of each second jaw 21 is mechanically connected to multiple second clamping fixtures 22. The LED is clamped by the second claw 21 and the second clamping fixture 22. The working principle and function of the second straightening turntable 20 will not be elaborated here. The second straightening turntable 20 adjusts the placement of the LED according to the position of the test electrode 19, so that the vacuum suction cup 7 accurately picks up the LED and places it on the test seat 18 so that it is precisely aligned with the test electrode 19 and makes full contact. The two test electrodes 19 are positive and negative terminals respectively to energize the positive and negative terminals of the two pins of the LED. If the LED lights up, it means that the LED power-on test is normal, thus verifying that the LED is a qualified material.

[0034] The test stand 18 is equipped with a photosensitive sensor to detect the light emitted by the LED. The photosensitive sensor sends a feedback signal to the vacuum suction cup 7, which then picks up the LED from the test stand 18. The rotating wheel 4 causes the vacuum suction cup 7 to transfer the tested LED into the loading cylinder 17. A loading track 27 is installed on the upper part of the machine base 1, adjacent to the rotating wheel 4. The loading track 27 is mechanically connected to the loading cylinder 17, and a conveyor belt connects the loading cylinder 17 and the loading track 27 to transport the LED. The loading track 27 is equipped with a conveyor belt for transporting the LED, and the inner surface of the loading cylinder 17 is equipped with a weight sensor for sensing the LED. The system uses a weight sensor to detect when an LED enters the feeding cylinder 17. The weight sensor sends a feedback signal to the control panel 2. The control panel 2 contains a microcontroller that controls the conveyor belt to transport the LED from the feeding cylinder 17 to the feeding track 27. The feeding track 27 has multiple guide grooves 32 that communicate with the feeding cylinder 17. The LED enters the guide grooves 32 from the feeding cylinder 17. The guide grooves 32 are elongated. Multiple air extraction ports 28 are installed around the feeding track 27. A vibrator 29 is installed at the lower end of the feeding track 27, which generates a constant periodic vibration on the entire feeding track 27. The frequency source of the vibration is such that the feeding track 27 is slightly inclined. The LEDs bounce and move inside the guide trough 32 due to the vibration force generated by the vibrator 29. The LEDs will be arranged in a long strip pattern inside the guide trough 32. Multiple protective plates 31 are installed on the upper end of the feeding track 27 to prevent the LEDs from falling upwards from the guide trough 32. Multiple sensors 30 are installed on the upper end of the feeding track 27 between adjacent protective plates 31. Multiple through holes matching the shape of the sensors 30 are opened on the surface of the protective plates 31. The ends of the sensors 30 extend into the adjacent through holes. The sensors 30 will move along the corresponding... Rays are emitted from the inside of the through hole into the feed trough 32. The inside of the feed trough 32 is smooth. When the rays hit the inside of the feed trough 32, they will undergo mirror reflection. When the rays hit the LED, they will change the mirror reflection effect. The ray reflection provides feedback to the sensor 30. The sensor 30 is used to sense whether the LED is on the feeding track 27 and is transmitted to a position near the exhaust port 28. The exhaust port 28 exhausts the air from the feed trough 32 inside the feeding track 27. The inside of the feed trough 32 is in a "negative pressure" state. The LED is adsorbed inside the feed trough 32 and will not vibrate and fall off, so that the robotic arm can automatically grab the LED to the next process.

[0035] The above steps are repeated cyclically, allowing each vacuum suction cup 7 to take turns picking up and placing each LED into the first straightening turntable 11, the second straightening turntable 20, and the reversing turntable 14. This straightens the LED pins, aligns them, and adjusts the spacing and position of the LED pins to ensure precise and full contact between the two LED pins and the two test electrodes 19. This avoids mistesting or missing LEDs and allows for accurate power-on testing of each LED before feeding, ensuring that each LED fed out can be powered on and used normally. The straightening and testing processes are performed in parallel with the feeding process, making it suitable for feeding LEDs of various shapes, sizes, and specifications. The feeding function is diversified, the process is integrated and optimized, which helps save time, speeds up production, and improves production efficiency.

Claims

1. A high-speed feeding device for LED production, comprising a machine base (1), characterized in that: A rotating wheel (4) is provided at the middle of the upper end of the machine base (1). A central shaft (6) is fixedly connected to the center of the rotating wheel (4). Multiple electric push rods (9) are fixedly connected around the rotating wheel (4). A vacuum suction cup (7) is fixedly connected to the lower end of each electric push rod (9). The upper end of the machine base (1) and adjacent to any side of the turntable (4) are provided with a feeding cylinder (17), a test seat (18), a first straightening turntable (11), a second straightening turntable (20) and a reversing turntable (14). The upper end of the reversing turntable (14) is integrally formed with a protrusion (16), and a pair of test electrodes (19) are installed on the upper end of the test seat (18). The upper end of the first straightening turntable (11) is connected to multiple first claws (12) via mechanical transmission, and the inner ends of the first claws (12) are all connected to multiple first clamping fixtures (13) via mechanical transmission. The second straightening turntable (20) is mechanically connected to a plurality of second jaws (21), and the inner ends of the second jaws (21) are all mechanically connected to a plurality of second clamping fixtures (22).

2. The high-speed feeding equipment for LED production as described in claim 1, characterized in that: A control panel (2) is installed at any corner of the upper end of the machine (1).

3. The high-speed feeding equipment for LED production as described in claim 1, characterized in that: The lower end of the central shaft (6) is connected to a first motor (10), and the lower end of the first motor (10) is fixedly connected to the upper end of the machine base (1).

4. The high-speed feeding equipment for LED production as described in claim 1, characterized in that: Each of the electric push rods (9) has a first vacuum port (5) that communicates with the interior of the adjacent vacuum suction cup (7) at its upper end. A second vacuum port (8) is provided around the upper end of the central shaft (6). A flexible hose is connected between the first vacuum port (5) and the second vacuum port (8) through a flange.

5. The high-speed feeding device for LED production as described in claim 1, characterized in that: The upper end of the machine base (1) and adjacent to any side of the rotating wheel (4) are connected by a feeding rail (25) and a hopper (3) through mechanical transmission. The end of the feeding rail (25) away from the rotating wheel (4) is connected by a vibrating plate (26) through mechanical transmission. The lower end of the vibrating plate (26) is fixedly connected to the upper end of the machine base (1). A hopper (3) is installed around the rotating wheel (4) and adjacent to any side of the vibrating plate (26).

6. The high-speed feeding device for LED production as described in claim 1, characterized in that: The reversing turntable (14) is connected to a second motor (15) via a synchronous belt drive at the end away from the turntable (4). The lower end of the second motor (15) is fixedly connected to the upper end of the machine base (1).

7. The high-speed feeding device for LED production as described in claim 1, characterized in that: The lower end of the second straightening turntable (20) is connected to a third motor (23), the lower end of which is fixedly connected to the upper end of the machine base (1). The lower end of the first straightening turntable (11) is connected to a fourth motor (24), the lower end of which is fixedly connected to the upper end of the machine base (1).

8. The high-speed feeding equipment for LED production as described in claim 1, characterized in that: A feeding track (27) is installed on the upper end of the machine base (1) and on the side adjacent to the turntable (4). The feeding track (27) is connected to the feeding cylinder (17) by mechanical transmission.

9. A high-speed feeding device for LED production as described in claim 8, characterized in that: The feeding track (27) has multiple guide grooves (32) inside. The upper end of the feeding track (27) is covered with multiple protective plates (31). Between two adjacent protective plates (31), multiple sensors (30) are installed on the upper end of the feeding track (27). The surface of the protective plate (31) has multiple through holes that match and are aligned with the shape of the sensors (30). The end of the sensor (30) extends into the interior of the adjacent through hole.

10. A high-speed feeding device for LED production as described in claim 9, characterized in that: Multiple air extraction ports (28) are installed around the feed track (27), and a vibrator (29) is installed at the lower end of the feed track (27).

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