A product detection device based on a magnetic levitation conveying platform

Abstract

This invention discloses a product inspection device based on a magnetic levitation conveying platform, belonging to the field of product inspection technology. It includes several inspection sections, each internally comprising a power unit, a vacuum unit, and an adsorption unit. The power unit includes a drive mechanism and a dual-gear system mechanism. The dual-gear system mechanism includes a driving gear and a driven gear, both of which are equipped with a central shaft and an eccentric shaft. A double eccentric component is rotatably connected to the central shaft of the driving gear. A gear train linkage and a rod train linkage are connected to the double eccentric component, and the rod train linkage is connected to the adsorption unit. A driven slider is rotatably connected to the eccentric shaft of the driven gear, providing power to the vacuum unit. The adsorption unit is connected to the vacuum unit via an air circuit. The system has high integration, low transmission loss, significantly improved energy utilization efficiency, a compact structure, and good energy-saving effect.

Description

Technical Field

[0001] This invention relates to the field of product testing technology, specifically a product testing device based on a magnetic levitation conveyor platform. Background Technology

[0002] Currently, the food industrial processing sector is gradually introducing intelligent manufacturing equipment. Product packaging integrity testing is a key link in ensuring product quality and safety. Common testing methods include visual inspection, airtightness testing, and weighing inspection. Visual inspection relies on image recognition technology, which is easily affected by factors such as light, color, and background, and has limited ability to identify transparent packaging or minor damage. Airtightness testing usually requires applying pressure or vacuuming the product, which is complex to operate, inefficient, and may place an additional burden on the packaging structure. Although weighing inspection is simple and easy to perform, it is not sensitive to minor gas leaks inside the packaging and cannot accurately identify products with poor sealing.

[0003] In addition, traditional testing equipment mostly adopts fixed or chain conveyor structures, and the testing rhythm is limited by the mechanical transmission efficiency, making it difficult to achieve continuous dynamic testing. Furthermore, it has high energy consumption, complex structure, and high maintenance costs. Therefore, there is an urgent need for an automated testing device that can achieve high efficiency, accuracy, energy saving, and adaptability to high-speed production lines. Summary of the Invention

[0004] The purpose of this invention is to provide a product inspection device based on a magnetic levitation conveyor platform to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a product inspection device based on a magnetic levitation conveying platform, comprising several inspection units, each of which is internally equipped with a power unit, a vacuum unit, and an adsorption unit; The power unit includes a drive mechanism and a dual-gear system. The dual-gear system includes a drive gear and a driven gear. The drive gear and the driven gear are meshed and connected. Both the drive gear and the driven gear are provided with a central shaft and an eccentric shaft. The eccentric shaft of the driving gear is connected to the drive mechanism. A double eccentric component is rotatably connected to the central shaft of the driving gear. A gear train linkage and a rod train linkage are connected to the double eccentric component. The end of the gear train linkage away from the double eccentric component is rotatably connected to the central shaft of the driven gear. The rod train linkage is connected to the adsorption unit. A driven slider is rotatably connected to the eccentric shaft of the driven gear. The driven slider provides power to the vacuum unit. The adsorption unit is connected to the air circuit of the vacuum unit. The product to be tested is conveyed to the bottom of the detection section through the conveyor line. Each detection section moves cyclically along the magnetic guide rail and detects each product through the cooperation of the power unit, vacuum unit, and adsorption unit. This achieves intelligent and efficient processing in the food processing field, improves detection accuracy, adapts to high-speed production lines, and improves work efficiency.

[0006] Furthermore, the detection unit includes a magnetic levitation detector, and the adsorption unit and the driven slider are slidably mounted in the magnetic levitation detector via a bracket; The gear train linkage is rotatably connected to the double eccentric component. The rotation center of the gear train linkage and the double eccentric component is aligned with the rotation center of the central shaft of the driving gear. A crank is integrally connected to the double eccentric component. The crank is rotatably connected to the linkage linkage. The connection point between the double eccentric component and the crank is aligned with the rotation center of the eccentric shaft of the driving gear. The first driving member drives the driving gear to perform eccentric rotational motion. Since the gear train linkage keeps the center distance between the driving gear and the driven gear constant, the driving gear and the driven gear remain meshed regardless of the change in the rotational position of the driving gear. Furthermore, since the driven slider only has the degree of freedom to slide along the axial direction of the upper slide rod, and the eccentric shaft of the driven gear and the driven slider are located on a transition turntable, the eccentric rotational motion of the driving gear drives the driven gear to perform eccentric rotational motion around the driven slider, while simultaneously pushing the driven slider to slide back and forth along the upper slide rod.

[0007] Furthermore, the vacuum unit includes a cylinder and a piston. The cylinder is installed in the magnetic levitation detector, and the piston is slidably installed inside the cylinder. One end of the piston is connected to the driven slider. Two flexible hoses are connected to the top of the cylinder, which are a pressure relief hose and a vacuum extraction hose, respectively. The vacuum unit also includes a rotary valve and a back pressure valve. The pressure relief hose is connected to the rotary valve, and the vacuum extraction hose is connected to the back pressure valve. The driven slider drives the piston to move in the cylinder, creating a vacuum in the cylinder. The rotation of the valve core of the rotary valve controls the opening and closing of the pressure relief hose with the outside atmosphere, and the back pressure valve controls the opening and closing of the connection between the vacuum extraction hose and the sliding carrier.

[0008] Furthermore, the driving mechanism includes a first driving member, the rotating valve core of the rotating air valve is connected to the first driving member, and the eccentric shaft of the drive gear is connected to the first driving member through the rotating valve core. When the pressure relief pipe is disconnected from the outside atmosphere, the cylinder maintains a vacuum state. When the pressure relief pipe is connected to the outside atmosphere, the cylinder loses the vacuum state. When the back pressure valve is opened, the through part of the sliding carrier generates negative pressure, which further causes the adsorption device to generate suction. When the back pressure valve is closed, the adsorption device cannot generate suction.

[0009] Furthermore, the adsorption unit includes a sliding carrier, which is slidably mounted in the magnetic levitation detector via a bracket. The back pressure valve is connected to the top of the sliding carrier, and the sliding carrier is rotatably connected to the rod linkage. The middle of the sliding carrier is vertically connected, and a sealing ring is slidably connected at the connection point. A top valve needle is provided on the top of the sealing ring.

[0010] Furthermore, a first elastic element is connected between the bottom of the sealing ring and the sliding carrier, and a hollow rod is connected to the bottom of the sealing ring. A small gear is provided in the middle of the hollow rod, and an adsorption device is provided at the bottom of the hollow rod. The adsorption device is connected to the through part of the sliding carrier through the hollow rod and the sealing ring. Since the rotation center of the crank and the eccentric shaft of the drive gear are aligned, the crank rotates on the fixed axis. The crank drives the sliding carrier to slide back and forth along the sliding rod through the linkage. When the sliding carrier moves downward, the adsorption device moves downward and contacts the product. When the product packaging is intact, even if the sliding carrier continues to move downward, the product's counter-support force on the adsorption device overcomes the tension of the first elastic element on the sealing ring, causing the sealing ring to stop moving. The back pressure valve contacts the top valve needle, the back pressure valve opens, and a negative pressure is generated inside the adsorption device to suck up the product. If the product packaging is damaged, the suction cup will continue to move downwards as the sliding carrier continues to move downwards. The back pressure valve will not be able to contact the top valve needle, and the suction cup will not be able to generate negative pressure to hold the product in place.

[0011] Furthermore, a deflector ring is rotatably mounted in the sliding carrier, and a second elastic element is provided between the deflector ring and the sliding carrier. The sliding carrier has several center-oriented grooves, and a small locking block is slidably installed in each groove. Each small locking block has an inclined groove. A pin is provided at the position of each inclined groove corresponding to the deflector ring. The pin is slidably connected to the inclined groove. When the back pressure valve contacts the top valve needle, the sealing ring passes the position of the small locking block. The small locking block moves outward first, forcing the deflector ring to deflect. After the sealing ring passes the small locking block, the deflector ring resets under the action of the second elastic element, causing the small locking block to pop out and block the sealing ring. Even if the sliding carrier slides upward along the sliding rod, the first elastic element cannot pull the sealing ring to reset. The top valve needle on the sealing ring opens the valve core of the back pressure valve, and the suction device uses negative pressure to suck the product upward.

[0012] Furthermore, the outer ring of the dial ring has a straight groove, and a curved groove is provided on one side of the straight groove. A spring is provided at the connection between the curved groove and the straight groove. A protruding post is provided on the inner wall of the magnetic levitation detector. The protruding post cooperates with the curved groove and the straight groove. After the product is attracted, the magnetic levitation detector moves along the magnetic guide rail. The small gear on the hollow rod meshes with the rack, forcing the small gear to drive the hollow rod to rotate. The adsorption device drives the product to rotate, rotating the product by a quarter turn. After the rotation is completed, the sliding carrier continues to move upward. The straight groove slides into the protruding post. Due to the inclined setting of the spring, the side of the spring with the reverse tilt angle has a large blocking force on the protruding post. Under the blocking of the spring, the curved groove slides into the protruding post, the dial ring deflects, the small locking block retracts inward, the first elastic element resets the sealing ring, the top valve needle leaves the back pressure valve, the negative pressure of the adsorption device disappears, and the product falls down. Products that are not adsorbed face different directions than those that are adsorbed and fall down. Damaged products are eventually identified and diverted, while intact products flow into the subsequent packaging process.

[0013] Furthermore, the device includes a testing machine equipped with a closed annular magnetic guide rail, on which the magnetic levitation testing instrument is mounted. The testing machine is also equipped with a rack that engages with a pinion. The bracket is installed inside the magnetic levitation detector. An upper sliding rod and a lower sliding rod are located on the upper part of the bracket. The driven slider is slidably mounted on the upper sliding rod, and the sliding carrier is slidably mounted on the lower sliding rod. When the product is being tested, the pressure relief pipe is disconnected from the external atmosphere, and the cylinder maintains a vacuum state. After the product is tested, the pressure relief pipe is connected to the external atmosphere. When the sliding carrier moves downwards, the resistance force on the convex post is small on the side of the spring with the positive tilt angle, and the straight groove directly passes over the convex post. The dial ring does not rotate. A first driving component drives the power unit, vacuum unit, and adsorption unit to move simultaneously, achieving the coordination between the vacuum environment and the testing action, thus achieving the purpose of product testing and realizing energy saving.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The magnetic levitation conveyor platform drives the cyclical movement of the inspection unit, achieving non-contact, low-resistance high-speed conveying. Combined with vacuum adsorption and mechanical linkage mechanisms, it can complete the rapid inspection of each product during continuous operation, significantly improving the inspection cycle of the production line, with high inspection efficiency, and adapting to high-speed production lines.

[0015] 2. By combining vacuum adsorption with back pressure valve control, negative pressure is directly applied to the product packaging to test its airtightness. It is not affected by visual factors such as product appearance, color, and transparency. It also has high sensitivity to minor damage. The test results are stable and reliable, accurate and reliable, and have strong anti-interference ability.

[0016] 3. The system achieves fully automated control of the entire process of detection, adsorption, rotation, and release by using only a single servo motor to drive the dual-wheel mechanism, vacuum unit, and adsorption unit in coordination. The system has high integration, low transmission loss, significantly improved energy efficiency, compact structure, and good energy-saving effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the magnetic guide rail portion of the present invention; Figure 3 This is a schematic diagram of the internal structure of the magnetic levitation detector of the present invention; Figure 4 This is a schematic diagram of the connection structure of the detection unit of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the connection structure of the detection unit of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the connection structure between the double eccentric component and the driving gear of the present invention; Figure 7 This is a schematic diagram of the sliding carrier of the present invention; Figure 8 This is a schematic diagram of the connection structure between the straight groove and the curved groove of the present invention.

[0018] In the diagram: 1. Testing machine; 2. Magnetic guide rail; 3. Magnetic levitation testing instrument; 4. Rack; 5. Support; 6. Servo motor; 7. Rotary air valve; 8. Driving gear; 9. Driven gear; 10. Upper slide rod; 11. Lower slide rod; 12. Driven slider; 13. Cylinder; 14. Piston; 15. Pressure relief pipe; 16. Air extraction pipe; 17. Gear train linkage; 18. Double eccentric component; 19. Rod linkage; 20. Back pressure valve; 21. Sliding carrier; 22. Hollow rod; 23. Adsorption device; 24. Sealing ring; 25. Top valve needle; 26. Tension spring; 27. Detachment ring; 28. Small locking block; 29. ​​Straight groove; 30. Curved groove; 31. Spring piece; 32. Small gear. Detailed Implementation

[0019] 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.

[0020] Example: Figures 1-8As shown, the present invention provides a technical solution: a product inspection device based on a magnetic levitation conveying platform, comprising an inspection machine 1, an annular closed magnetic guide rail 2 on the inspection machine 1, a magnetic levitation detector 3 mounted on the magnetic guide rail 2, a rack 4 on the inspection machine 1, the rack 4 engaging with a pinion 32, a support 5 disposed inside the magnetic levitation detector 3, an upper sliding rod 10 and a lower sliding rod 11 disposed on the upper part of the support 5, a driven slider 12 slidably mounted on the upper sliding rod 10, and a sliding carrier 21 slidably mounted on the lower sliding rod 11. The device also includes several inspection sections, each inspection section containing a power unit, a vacuum unit, and an adsorption unit. The power unit includes a drive mechanism and a dual-gear system mechanism, the dual-gear system mechanism including a driving gear 8 and a driven gear 9, the driving gear 8 and the driven gear 9 being the same size and meshing with each other. Both the driven gear 8 and the driven gear 9 are equipped with a central shaft and an eccentric shaft. The eccentric shaft of the driving gear 8 is connected to the drive mechanism. A double eccentric component 18 is rotatably connected to the central shaft of the driving gear 8. A gear train connecting rod 17 and a rod train connecting rod 19 are connected to the double eccentric component 18. The end of the gear train connecting rod 17 away from the double eccentric component 18 is rotatably connected to the central shaft of the driven gear 9. The rod train connecting rod 19 is connected to the adsorption unit. A driven slider 12 is rotatably connected to the eccentric shaft of the driven gear 9. The driven slider 12 provides power to the vacuum unit. The adsorption unit is connected to the vacuum unit via a gas path. The product to be tested is conveyed to the bottom of the testing section through the conveyor line. Each testing section moves cyclically along the magnetic guide rail 2 and is tested for each product through the cooperation of the power unit, vacuum unit, and adsorption unit. This achieves intelligent and efficient processing in the food processing field, improves testing accuracy, adapts to high-speed production lines, and improves work efficiency.

[0021] The detection unit includes a magnetic levitation detector 3, an adsorption unit, and a driven slider 12, which are slidably mounted in the magnetic levitation detector 3 via a bracket 5. A gear train connecting rod 17 is rotatably connected to a double eccentric component 18. The rotation centers of the gear train connecting rod 17 and the double eccentric component 18 are aligned with the rotation center of the central shaft of the driving gear 8. A crank is integrally connected to the double eccentric component 18, and the crank is rotatably connected to a rod train connecting rod 19. The connection point between the double eccentric component 18 and the crank is aligned with the rotation center of the eccentric shaft of the driving gear 8. A servo motor 6 drives the driving gear 8 to rotate eccentrically. During the motion, since the center distance between the driving gear 8 and the driven gear 9 remains constant due to the gear train linkage 17, the driving gear 8 and the driven gear 9 remain meshed regardless of the change in the rotational position of the driving gear 8. Furthermore, since the driven slider 12 only has the degree of freedom to slide along the axial direction of the upper slide rod 10, and the eccentric shaft of the driven gear 9 and the driven slider 12 are located on the transition turntable, the eccentric rotational motion of the driving gear 8 drives the driven gear 9 to perform eccentric rotational motion around the driven slider 12, while simultaneously pushing the driven slider 12 to slide back and forth along the upper slide rod 10.

[0022] The vacuum unit includes a cylinder 13 and a piston 14. The cylinder 13 is installed in the magnetic levitation detector 3, and the piston 14 is slidably installed inside the cylinder 13. One end of the piston 14 is connected to the driven slider 12. Two flexible hoses are connected to the top of the cylinder 13, namely a pressure relief hose 15 and a suction hose 16. The vacuum unit also includes a rotary valve 7 and a back pressure valve 20. The pressure relief hose 15 is connected to the rotary valve 7, and the suction hose 16 is connected to the back pressure valve 20. The drive mechanism includes a servo motor 6. The rotary valve core of the rotary valve 7 is connected to the servo motor 6, and the eccentric shaft of the drive gear 8 is connected to the servo motor 6 through the rotary valve core. Connected, the driven slider 12 drives the piston 14 to move in the cylinder 13, creating a vacuum in the cylinder 13. The valve core of the rotating air valve 7 controls the opening and closing of the pressure relief pipe 15 with the outside atmosphere. The back pressure valve 20 controls the opening and closing of the connection between the suction pipe 16 and the sliding carrier 21. When the pressure relief pipe 15 is disconnected from the outside atmosphere, the cylinder 13 maintains a vacuum state. When the pressure relief pipe 15 is connected to the outside atmosphere, the cylinder 13 loses its vacuum state. When the back pressure valve 20 is opened, the connection of the sliding carrier 21 generates negative pressure, further causing the adsorption device 23 to generate suction. When the back pressure valve 20 is closed, the adsorption device 23 cannot generate suction.

[0023] The adsorption unit includes a sliding carrier 21, which is slidably mounted in the magnetic levitation detector 3 via a bracket 5. A back pressure valve 20 is connected to the top of the sliding carrier 21. The sliding carrier 21 is rotatably connected to the rod linkage 19. The middle of the sliding carrier 21 is vertically connected, and a sealing ring 24 is slidably connected at the connection point. A top valve needle 25 is provided at the top of the sealing ring 24. A tension spring 26 is connected between the bottom of the sealing ring 24 and the sliding carrier 21. A hollow rod 22 is connected to the bottom of the sealing ring 24. A small gear 32 is provided in the middle of the hollow rod 22. An adsorption device 23 is provided at the bottom of the hollow rod 22. The adsorption device 23 is connected to the hollow rod 22 and the sealing ring 24 via the back pressure valve 20. The sealing ring 24 is connected to the through part of the sliding carrier 21. Since the rotation center of the crank and the eccentric shaft of the drive gear 8 are aligned, the crank rotates on the fixed axis. The crank drives the sliding carrier 21 to slide back and forth along the sliding rod 11 through the linkage 19. When the sliding carrier 21 moves downward, the suction cup 23 moves downward and contacts the product. When the product packaging is intact, even if the sliding carrier 21 continues to move downward, the product's counter-support force on the suction cup 23 overcomes the tension of the tension spring 26 on the sealing ring 24, causing the sealing ring 24 to stop moving. The back pressure valve 20 contacts the top valve needle 25, the back pressure valve 20 opens, and a negative pressure is generated in the suction cup 23 to suck up the product. If the product packaging is damaged, the suction cup 23 will also continue to move downwards as the sliding carrier 21 continues to move downwards. The back pressure valve 20 will not be able to contact the top valve needle 25, and the suction cup 23 will not be able to generate negative pressure to hold the product.

[0024] A rotating ring 27 is provided in the sliding carrier 21. A return coil spring (not shown in the figure) is provided between the ring 27 and the sliding carrier 21. Several sliding grooves facing the center are opened in the sliding carrier 21. A small locking block 28 is slidably installed in each groove. Each small locking block 28 has an inclined groove. A pin is provided at the position of each inclined groove on the ring 27. The pin is slidably connected to the inclined groove. A straight groove 29 is opened on the outer ring of the ring 27. A curved groove 30 is provided on one side of the straight groove 29. A spring piece 31 is provided at the connection between the curved groove 30 and the straight groove 29. A protruding post is provided on the inner wall of the magnetic levitation detector 3. The protruding post cooperates with the curved groove 30 and the straight groove 29.

[0025] When the back pressure valve 20 contacts the top valve needle 25, the sealing ring 24 passes the position of the small locking block 28. The small locking block 28 moves outward first, forcing the deflector ring 27 to deflect. After the sealing ring 24 passes the small locking block 28, the deflector ring 27 resets under the action of the reset spring, causing the small locking block 28 to pop out and block the sealing ring 24. Even if the sliding carrier 21 slides upward along the sliding rod 11, the tension spring 26 cannot pull the sealing ring 24 to reset. The top valve needle 25 on the sealing ring 24 opens the valve core of the back pressure valve 20. The suction device 23 uses negative pressure to lift the product upward. After the product is lifted, the magnetic levitation detector 3 moves along the magnetic guide rail 2. The pinion 32 on the hollow rod 22 meshes with the rack 4, forcing the small locking block 28 to deflect. Gear 32 drives hollow rod 22 to rotate, suction device 23 drives product to rotate, rotating the product by a quarter turn. After the rotation ends, sliding carrier 21 continues to move upward, straight groove 29 slides into protrusion. Due to the inclined setting of spring 31, the side of spring 31 with the reverse tilt angle has a greater blocking force on the protrusion. Under the blocking of spring 31, curved groove 30 slides into protrusion, deflecting ring 27 deflects, small locking block 28 retracts inward, tension spring 26 resets sealing ring 24, top valve needle 25 leaves back pressure valve 20, suction device 23 loses negative pressure, and product falls. The unadsorbed product and the product that falls after being sucked up have different orientations. Damaged products are finally identified and diverted, and intact products flow into the subsequent packaging process.

[0026] When the product is under testing, the pressure relief pipe 15 is disconnected from the outside atmosphere, and the cylinder 13 maintains a vacuum state. After the product is tested, the pressure relief pipe 15 is connected to the outside atmosphere. When the sliding carrier 21 moves downward, the resistance of the protrusion on the side of the positive tilt angle of the spring 31 is small, and the straight groove 29 directly passes over the protrusion. The dial ring 27 will not rotate. The power unit, vacuum unit and adsorption unit are driven to move simultaneously by a servo motor 6, realizing the mutual coordination between the vacuum environment and the testing action, achieving the purpose of testing the product and realizing the energy-saving effect.

[0027] The working principle of this invention is as follows: the product to be tested is conveyed to the bottom of the testing unit through the conveyor line. Each testing unit moves in a cycle along the magnetic guide rail 2 and is tested by the cooperation of the power unit, vacuum unit and adsorption unit.

[0028] The servo motor 6 drives the drive gear 8 to perform eccentric rotation. Since the gear train linkage 17 keeps the center distance between the drive gear 8 and the driven gear 9 constant, the drive gear 8 and the driven gear 9 remain meshed regardless of the change in the rotation position of the drive gear 8. Since the driven slider 12 only has the degree of freedom to slide along the axial direction of the upper slide rod 10, and the eccentric shaft of the driven gear 9 and the driven slider 12 are located on the transition turntable, the eccentric rotation of the drive gear 8 drives the driven gear 9 to perform eccentric rotation around the driven slider 12, while simultaneously pushing the driven slider 12 to slide back and forth along the upper slide rod 10.

[0029] Driven by the driven slider 12, the piston 14 moves in the cylinder 13, creating a vacuum in the cylinder 13. The valve core of the rotating air valve 7 controls the opening and closing of the pressure relief pipe 15 with the outside atmosphere. The back pressure valve 20 controls the opening and closing of the connection between the suction pipe 16 and the sliding carrier 21. When the pressure relief pipe 15 is disconnected from the outside atmosphere, the cylinder 13 maintains a vacuum state. When the pressure relief pipe 15 is connected to the outside atmosphere, the cylinder 13 loses its vacuum state. When the back pressure valve 20 is opened, a negative pressure is generated in the connection of the sliding carrier 21, further causing the adsorption device 23 to generate suction. When the back pressure valve 20 is closed, the adsorption device 23 cannot generate suction.

[0030] Since the rotation center of the crank is aligned with the eccentric shaft of the drive gear 8, the crank rotates on the fixed axis. The crank drives the sliding carrier 21 to slide back and forth along the sliding rod 11 through the linkage 19. When the sliding carrier 21 moves downward, the suction cup 23 moves downward and contacts the product. When the product packaging is intact, even if the sliding carrier 21 continues to move downward, the product's counter-support force on the suction cup 23 overcomes the tension of the tension spring 26 on the sealing ring 24, causing the sealing ring 24 to stop moving. The back pressure valve 20 contacts the top valve needle 25, the back pressure valve 20 opens, and a negative pressure is generated inside the suction cup 23 to suck up the product. If the product packaging is damaged, the suction cup 23 will also continue to move downwards as the sliding carrier 21 continues to move downwards. The back pressure valve 20 will not be able to contact the top valve needle 25, and the suction cup 23 will not be able to generate negative pressure to hold the product.

[0031] When the back pressure valve 20 contacts the top valve needle 25, the sealing ring 24 passes the position of the small locking block 28. The small locking block 28 moves outward first, forcing the deflector ring 27 to deflect. After the sealing ring 24 passes the small locking block 28, the deflector ring 27 resets under the action of the reset spring, causing the small locking block 28 to pop out and block the sealing ring 24. Even if the sliding carrier 21 slides upward along the sliding rod 11, the tension spring 26 cannot pull the sealing ring 24 to reset. The top valve needle 25 on the sealing ring 24 opens the valve core of the back pressure valve 20. The suction device 23 uses negative pressure to lift the product upward. After the product is lifted, the magnetic levitation detector 3 moves along the magnetic guide rail 2. The pinion 32 on the hollow rod 22 meshes with the rack 4, forcing the small locking block 28 to deflect. Gear 32 drives hollow rod 22 to rotate, suction device 23 drives product to rotate, rotating the product by a quarter turn. After the rotation ends, sliding carrier 21 continues to move upward, straight groove 29 slides into protrusion. Due to the inclined setting of spring 31, the side of spring 31 with the reverse tilt angle has a greater blocking force on the protrusion. Under the blocking of spring 31, curved groove 30 slides into protrusion, deflecting ring 27 deflects, small locking block 28 retracts inward, tension spring 26 resets sealing ring 24, top valve needle 25 leaves back pressure valve 20, suction device 23 loses negative pressure, and product falls. The unadsorbed product and the product that falls after being sucked up have different orientations. Damaged products are finally identified and diverted, and intact products flow into the subsequent packaging process.

[0032] When the product is under testing, the pressure relief pipe 15 is disconnected from the outside atmosphere, and the cylinder 13 maintains a vacuum state. After the product is tested, the pressure relief pipe 15 is connected to the outside atmosphere. When the sliding carrier 21 moves downward, the resistance of the protrusion on the side of the positive tilt angle of the spring 31 is small, and the straight groove 29 directly passes over the protrusion. The dial ring 27 will not rotate. The power unit, vacuum unit and adsorption unit are driven to move simultaneously by a servo motor 6, realizing the mutual coordination between the vacuum environment and the testing action, achieving the purpose of testing the product and realizing the energy-saving effect.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A product inspection device based on a magnetic levitation conveyor platform, characterized in that: It includes several detection units, each of which is internally equipped with a power unit, a vacuum unit, and an adsorption unit; The power unit includes a drive mechanism and a dual-gear system. The dual-gear system includes a drive gear (8) and a driven gear (9). The drive gear (8) and the driven gear (9) are meshed and connected. Both the drive gear (8) and the driven gear (9) are provided with a central shaft and an eccentric shaft. The eccentric shaft of the driving gear (8) is connected to the drive mechanism. A double eccentric component (18) is rotatably connected to the central shaft of the driving gear (8). A gear train link (17) and a rod train link (19) are connected to the double eccentric component (18). The end of the gear train link (17) away from the double eccentric component (18) is rotatably connected to the central shaft of the driven gear (9). The rod train link (19) is connected to the adsorption unit. A driven slider (12) is rotatably connected to the eccentric shaft of the driven gear (9). The driven slider (12) provides power to the vacuum unit. The adsorption unit is connected to the air passage of the vacuum unit.

2. The product inspection device based on a magnetic levitation conveyor platform according to claim 1, characterized in that: The detection unit includes a magnetic levitation detector (3), and the adsorption unit and the driven slider (12) are slidably installed in the magnetic levitation detector (3) via a bracket (5); The gear train connecting rod (17) is rotatably connected to the double eccentric member (18). The rotation centers of the gear train connecting rod (17) and the double eccentric member (18) are aligned with the rotation center of the central shaft of the driving gear (8). A crank is integrally connected to the double eccentric member (18). The crank is rotatably connected to the rod train connecting rod (19). The connection point between the double eccentric member (18) and the crank is aligned with the rotation center of the eccentric shaft of the driving gear (8).

3. The product inspection device based on a magnetic levitation conveyor platform according to claim 2, characterized in that: The vacuum unit includes a cylinder (13) and a piston (14). The cylinder (13) is installed in the magnetic levitation detector (3). The piston (14) is sealed and slidably installed in the cylinder (13). One end of the piston (14) is connected to the driven slider (12). Two hoses are connected to the top of the cylinder (13). The two hoses are a pressure relief pipe (15) and a suction pipe (16). The vacuum unit also includes a rotary valve (7) and a back pressure valve (20). The pressure relief pipe (15) is connected to the rotary valve (7), and the suction pipe (16) is connected to the back pressure valve (20).

4. The product inspection device based on a magnetic levitation conveyor platform according to claim 3, characterized in that: The driving mechanism includes a first driving member, the rotating valve core of the rotating air valve (7) is connected to the first driving member, and the eccentric shaft of the driving gear (8) is connected to the first driving member through the rotating valve core.

5. A product inspection device based on a magnetic levitation conveyor platform according to claim 3, characterized in that: The adsorption unit includes a sliding carrier (21), which is slidably installed in the magnetic levitation detector (3) via a bracket (5). The back pressure valve (20) is connected to the top of the sliding carrier (21), and the sliding carrier (21) is rotatably connected to the rod linkage (19). The middle part of the sliding carrier (21) is vertically connected, and a sealing ring (24) is slidably connected at the connection point. A top valve needle (25) is provided on the top of the sealing ring (24).

6. The product inspection device based on a magnetic levitation conveyor platform according to claim 5, characterized in that: A first elastic element is connected between the bottom of the sealing ring (24) and the sliding carrier (21). A hollow rod (22) is connected to the bottom of the sealing ring (24). A small gear (32) is provided in the middle of the hollow rod (22). An adsorption device (23) is provided at the bottom of the hollow rod (22). The adsorption device (23) is connected to the through part of the sliding carrier (21) through the hollow rod (22) and the sealing ring (24).

7. A product inspection device based on a magnetic levitation conveyor platform according to claim 5, characterized in that: A dial ring (27) is rotatably provided in the sliding carrier (21). A second elastic element is provided between the dial ring (27) and the sliding carrier (21). Several sliding grooves facing the center are provided in the sliding carrier (21). A small locking block (28) is slidably installed in each of the sliding grooves. An inclined groove is provided on each of the small locking blocks (28). A pin is provided at the position of each inclined groove corresponding to the dial ring (27). The pin is slidably connected to the inclined groove.

8. A product inspection device based on a magnetic levitation conveyor platform according to claim 7, characterized in that: The outer ring of the dial (27) has a straight groove (29), and a curved groove (30) is provided on one side of the straight groove (29). A spring piece (31) is provided at the connection between the curved groove (30) and the straight groove (29). A protruding post is provided on the inner wall of the magnetic levitation detector (3), and the protruding post cooperates with the curved groove (30) and the straight groove (29).

9. A product inspection device based on a magnetic levitation conveyor platform according to claim 6, characterized in that: The device includes a testing machine (1), on which a closed annular magnetic guide rail (2) is provided, and a magnetic levitation testing instrument (3) is installed on the magnetic guide rail (2). The testing machine (1) is also provided with a rack (4), which cooperates with a pinion (32). The bracket (5) is installed inside the magnetic levitation detector (3). An upper sliding rod (10) is provided on the upper part of the bracket (5), and a lower sliding rod (11) is provided on the upper part of the bracket (5). The driven slider (12) is slidably installed on the upper sliding rod (10), and the sliding carrier (21) is slidably installed on the lower sliding rod (11).

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