Visual inspection and sorting apparatus for fasteners

Abstract

The application relates to a visual detection and sorting device for fasteners and belongs to the technical field of intelligent detection devices, which comprises a base and a feeding assembly, a glass disc of transparent material is rotatably arranged above the base, a driving element is fixedly arranged in the glass disc, and an annular through hole is formed in the middle of the glass disc; a guide assembly, a first detection element, a second detection element, a third detection element and a screening assembly are sequentially arranged around the glass disc at the outer edge of the top surface of the base, and the feeding assembly is located between the guide assembly and the screening assembly; in the application, key quality characteristics of cross screws are collected from different angles and positions, and the workpieces can be automatically classified and stored according to the detection results, so that the automatic shunting of qualified products, unqualified products and workpieces to be rechecked is realized; the overall device realizes mechanized automatic feeding, automatic rotary conveying, multi-station visual detection and automatic sorting, and greatly improves the overall efficiency and determination accuracy of detection operation.

Description

Technical Field

[0001] This application relates to the technical field of intelligent inspection devices, and in particular to a visual inspection and sorting device for fasteners. Background Technology

[0002] Fasteners, as indispensable basic components in mechanical manufacturing and assembly, come in a wide variety of types, including slotted screws, Phillips head screws, and socket head cap screws. Among them, Phillips head screws, due to their high torque transmission efficiency and anti-slip properties, are widely used in various precision assembly scenarios. Structurally, Phillips head screws mainly consist of a screw head and a nut head. The screw head has threads on its outer circumference for screwing, and the nut head is fixed to one end of the screw head, with a cross-shaped groove on its end face for screwdriver engagement. The forming accuracy of the cross-shaped groove, the integrity of the groove walls, and the quality of the thread profile of the screw head directly determine the assembly performance and service life of the Phillips head screw. Therefore, quality inspection of these key structural features is particularly important in the manufacturing and factory inspection of Phillips head screws.

[0003] A cross-head screw inspection and sorting station is disclosed in related technologies. The equipment includes a base and a lighting fixture mounted on the top surface of the base. In the actual inspection and sorting process, workers place the cross-head screws to be inspected on the base and, using the lighting fixture, continuously observe them visually to check the thread quality of the screw shaft and the opening of the cross grooves on the nut. After both inspection items for a single cross-head screw are confirmed, workers classify and judge them based on the observation results: if both the thread accuracy and the cross groove opening meet the preset processing requirements, they are classified as good products and collected in the good product area; if either one fails to meet the preset requirements simultaneously, they are classified as defective products and collected in the defective product area.

[0004] In the aforementioned technologies, the inspection process heavily relies on continuous visual observation by workers, requiring them to maintain close-up focus on the minute structural features of the Phillips head screws for extended periods. As the inspection time accumulates, the workers' eye muscles become constantly tense, easily leading to visual fatigue. When eye fatigue occurs, the worker's ability to distinguish thread defects in the screw shaft and flaws in the Phillips head groove of the nut significantly decreases, resulting in a substantial increase in the missed detection rate and false judgment rate. Furthermore, prolonged repetitive visual actions can cause distraction, further reducing the overall efficiency and accuracy of the inspection process, indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a visual inspection and sorting device for fasteners, which solves the problems of visual fatigue caused by manual visual inspection in the above-mentioned related technologies, resulting in a high rate of missed detection and false judgment, and low inspection efficiency.

[0006] The visual inspection and sorting device for fasteners provided in this application adopts the following technical solution: A visual inspection and sorting device for fasteners includes a base and a feeding assembly. A transparent glass disk is rotatably mounted on the top of the base, and a drive component is fixed inside to drive the glass disk to rotate around its own axis. An annular through hole is opened in the middle of the glass disk. The feeding assembly is used to automatically feed Phillips head screws vertically onto the top surface of the glass disk, with the nut part abutting against the top surface of the glass disk. Around the outer edge of the top surface of the base, a guide assembly is arranged in sequence to move the fed Phillips head screws to the outer edge of the glass disk, a first detection component to detect the external thread on the screw part, a second detection component to detect the coaxiality of the nut part and the screw part, a third detection component to detect the Phillips head groove on the nut part, and a sieving assembly to classify and collect the workpieces according to the detection results. The feeding assembly is located between the guide assembly and the sieving assembly.

[0007] By adopting the above technical solution, the three inspection components visually acquire the key quality characteristics of the cross screw from different angles and orientations, comprehensively covering the main inspection items of the cross screw. This avoids the visual fatigue caused by prolonged observation of small structures during manual visual inspection, effectively reducing the missed detection rate and the misjudgment rate. The sorting component automatically classifies and stores the workpieces according to the inspection results, realizing the automatic separation of good products, defective products and workpieces to be re-inspected. The entire device replaces the traditional manual visual inspection method with mechanized automatic feeding, automated rotary conveying, multi-station visual inspection and automatic sorting, greatly improving the overall efficiency and accuracy of the inspection operation.

[0008] Optionally, the feeding assembly includes a support frame installed on the vertical side of the base, a vibrating plate fixed to the top surface of the support frame, and a linear feeding track fixed to the outer edge of the vibrating plate. The end of the linear feeding track away from the vibrating plate extends to the glass plate located between the guiding assembly and the screening assembly.

[0009] By adopting the above technical solution, the support frame provides a stable installation foundation for the vibratory feeder. The vibratory feeder arranges the cross screws in an orderly manner through its own vibration and outputs them one by one in the vertical direction, realizing the automatic feeding of cross screws. The linear feeding track is fixed at the outer edge of the vibratory feeder, which transports the cross screws output by the vibratory feeder to the end of the linear feeding track away from the vibratory feeder in a stable posture. This end extends to the glass plate located between the guide component and the screening component, so that the cross screws can be accurately placed on the top surface of the glass plate, and the nut part abuts against the top surface of the glass plate. This completes the automatic feeding transition from the vibratory feeder to the glass plate, eliminating the manual operation of placing each piece one by one, and improving feeding efficiency and feeding consistency.

[0010] Optionally, a support arm is fixed on the top surface of the base, and a crossbeam located above the glass disk is fixed on the top surface of the support arm. The guiding component includes a correction plate and a limiting plate that are offset and fixed to the bottom surface of the crossbeam in a vertically downward direction. The limiting plate is located on the side of the correction plate away from the axis of the glass disk, and a guide gap is preset between the limiting plate and the correction plate for sliding guidance of the cross screw on the glass disk.

[0011] By adopting the above technical solution, the support arm provides stable support for the crossbeam, and the crossbeam, located above the glass disk, provides an installation position for the correction plate and the limiting plate. The correction plate and the limiting plate are fixedly and offset to the bottom surface of the crossbeam in a vertically downward direction. The limiting plate is located on the side of the correction plate away from the axis of the glass disk. The preset guide gap between the correction plate and the limiting plate provides a sliding guide channel for the cross screw on the glass disk. When the glass disk drives the cross screw to rotate to the bottom of the guide component, the nut of the cross screw is moved outward to the outer edge of the glass disk under the constraint of the guide gap. The correction plate corrects the position of the cross screw, so that the cross screw maintains a uniform posture and position in subsequent inspection stations, creating conditions for accurate shooting by the first camera, the second camera and the third camera, and improving the stability of visual inspection.

[0012] Optionally, a first support rod and a mounting rod are fixed on the top surface of the base. The first detection element includes a first camera fixed on the outer periphery of the first support rod and facing the axis of the glass disk. An extension rod is fixed on the upper end face of the mounting rod in the horizontal direction. A first lighting lamp located above the glass disk and facing the first camera is fixed on the bottom surface of the other end of the extension rod.

[0013] By adopting the above technical solution, the first support rod provides mounting support for the first camera. The first camera is fixed on the outer periphery of the first support rod and faces the axis of the glass disk, enabling it to acquire image information of the external thread on the screw part from the side. The mounting rod provides a fixed base for the extension rod. The extension rod is fixed horizontally on the upper end face of the mounting rod, extending the first illumination lamp above the annular through hole. The first illumination lamp is positioned facing the first camera and provides illumination to the external thread on the screw part from below through the annular through hole in the middle of the glass disk. This ensures that the thread image captured by the first camera has sufficient light contrast, which helps to clearly present the tooth profile of the thread, thereby improving the accuracy of the first inspection piece in identifying defects in the external thread on the screw part.

[0014] Optionally, a second support rod is fixed on the top surface of the base, and the second detection component includes a second camera fixed on the upper outer periphery of the second support rod in a vertically downward direction and located above the glass disk, and a second lighting lamp fixed on the lower outer periphery of the second support rod in a vertically upward direction and located below the glass disk, with the second camera located directly above the second lighting lamp.

[0015] By adopting the above technical solution, the second support rod provides an installation position for the second camera and the second illumination lamp. The second camera is fixed vertically downward on the upper outer periphery of the second support rod and located above the glass plate. The second illumination lamp is fixed vertically upward on the lower outer periphery of the second support rod and located below the glass plate. The second camera is located directly above the second illumination lamp, forming a top-to-bottom light path layout. When the cross screw passes the second detection piece with the glass plate, the second illumination lamp shines upward on the nut and screw parts through the transparent glass plate from below. The second camera takes a vertical shot from above, which can clearly obtain the coaxiality image of the nut and screw parts. The transparent glass plate ensures smooth transmission of the light path, and the top-to-bottom arrangement effectively avoids shadow interference and improves the accuracy of coaxiality detection.

[0016] Optionally, a third support rod is fixed on the top surface of the base, and the third detection component includes a third camera fixed on the lower outer periphery of the third support rod in a vertically upward direction and located below the glass disk, and a third lighting lamp fixed on the outer periphery of the third support rod and located above and below the glass disk.

[0017] By adopting the above technical solution, the third support rod provides a mounting base for the third camera and the third lighting lamp. The third camera is fixed vertically upward on the lower outer periphery of the third support rod and located below the glass plate, enabling it to capture images of the cross groove on the nut part from below through the transparent glass plate. The third lighting lamp is fixed on the outer periphery of the third support rod and located above and below the glass plate, providing illumination to the cross groove from both the upper and lower directions of the glass plate. This effectively eliminates the reflective dark areas that may be generated by illumination from a single direction, making the groove wall outline of the cross groove appear clearer and more complete in the image of the third camera, thereby improving the ability of the third inspection component to judge the forming accuracy and groove wall integrity of the cross groove.

[0018] Optionally, the screening assembly includes a first collection hopper fixed to the top surface of the base for collecting good products, a second collection hopper fixed to the top surface of the base for collecting defective products, and a third collection hopper placed on the top surface of the base for collecting products requiring secondary testing. The base is provided with a first discharge pipe whose inner end is connected to the lower end of the first collection hopper and a second discharge pipe whose inner end is connected to the lower end of the second collection hopper. Collection bags can be detachably installed at the openings of the first discharge pipe and the second discharge pipe. An arc-shaped plate is fixed on the top surface of the base above the glass plate. A first air blower facing the opening of the first collection hopper, a second air blower facing the opening of the second collection hopper, and a third air blower facing the opening of the third collection hopper are fixed on the top surface of the arc-shaped plate.

[0019] By adopting the above technical solution, the first collection hopper is used to collect good products, the second collection hopper is used to collect defective products, and the third collection hopper is used to collect workpieces that require secondary inspection, thus realizing the classification and storage of inspection results; the first discharge pipe is connected to the lower end of the first collection hopper, and the second discharge pipe is connected to the lower end of the second collection hopper, guiding the classified workpieces to their corresponding collection bags; the arc plate is located above the glass plate, and the first air blower on the top surface of the arc plate faces the opening of the first collection hopper, the second air blower faces the opening of the second collection hopper, and the third air blower faces the opening of the third collection hopper. The airflow blows the inspected workpieces into their corresponding collection hoppers, realizing non-contact automatic sorting and avoiding damage to the workpiece surface caused by mechanical manipulation.

[0020] Optionally, the vertical side of the first discharge pipe facing downwards on the base is a screening surface. Two connecting plates located on opposite sides of the first and second discharge pipes are rotatably connected to the screening surface via a rotating shaft. The rotating surfaces of the two connecting plates are parallel to the screening surface. Two clearance holes are provided on the connecting plates, allowing them to rotate to a fixed, vertically upward position and a horizontally close-to-each-side position below the first discharge pipe. When the connecting plates are in the positioning position, clamping elements are provided on both opposite edges of the top surface. Below, an elastic positioning plate with elastic elongation properties is vertically fixed on the side of the connecting plate away from the rotating shaft. The upper part is fixed with a positioning block and a positioning slot; the lower part of the screening surface is detachably installed with a receiving plate in the horizontal direction, and two receiving slots are opened on the top surface of the receiving plate; when the two connecting plates are in the fixed state, the two elastic positioning plates rotate towards each other to a horizontal state above the first and second discharge pipes, and the positioning block on one of the two elastic positioning plates is inserted into the positioning slot on the other; when the two connecting plates are in the positioning state, the two elastic positioning plates rotate to a vertical downward state, the positioning block is inserted into the receiving slot, and the clamping member clamps and fixes the upper edge of the opening of the collection bag at this time, and the two clearance through holes are located directly below the openings of the first and second discharge pipes respectively.

[0021] By adopting the above technical solution, in the positioning state, the two connecting plates rotate to a position below the first discharge pipe and horizontally close to each other, and the two elastic positioning plates rotate to a vertically downward state. The positioning blocks are inserted into the receiving slots, so that the connecting plates and the receiving plates form a stable connection. At this time, the two clearance through holes are located directly below the openings of the first and second discharge pipes, respectively. The clamping device clamps and fixes the upper edge of the opening of the collection bag. The combination of the two connecting plates and the clamping device limits and fixes the upper edge of the collection bag. The top surface of the receiving plate supports the bottom surface of the collection bag. The two elastic positioning plates separate the two collection bags, ensuring the stable fixation of the collection bags and the smooth discharge during the application of the device. In the fixed state, the two connecting plates rotate to a vertically upward state, and the two elastic positioning plates rotate to a horizontal state facing each other, with the positioning blocks interlocking with each other. The two connecting plates protect the sides of the first and second discharge pipes that are far apart from each other, and the two elastic positioning plates protect the top of the first and second discharge pipes, achieving effective protection when the device is stopped.

[0022] Optionally, the clamping component includes an elastic clamping rod with one end rotatably connected to the connecting plate toward the edge of the screening surface and having elastic shortening properties. A clamping hook is fixedly provided on the other end of the elastic clamping rod, and a connecting slot is provided on the side of the connecting plate away from the screening surface. When the connecting plate is in a fixed state, the rotating surface of the elastic clamping rod is parallel to the top surface of the base, and the clamping hook is engaged in the connecting slot when the connecting plate is in a positioning state.

[0023] By adopting the above technical solution, one end of the elastic clamping rod is rotatably connected to the connecting plate towards the edge of the screening surface and has elastic shortening performance, allowing the elastic clamping rod to swing elastically within a certain range and automatically reset; the clamping hook is fixed on the other end of the elastic clamping rod, and a connecting slot is opened on the side of the connecting plate away from the screening surface; when the connecting plate is in the positioning state, the rotating surface of the elastic clamping rod is parallel to the top surface of the base, the clamping hook is engaged in the connecting slot, and the clamping force generated by the elastic shortening performance of the elastic clamping rod is used to clamp and fix the upper edge of the opening of the collection bag with the top surface of the connecting plate and the bottom surface of the elastic clamping rod, preventing the collection bag from falling off or shifting due to the impact of the workpiece during the discharge process; when the connecting plate is in the fixed state, the clamping hook is elastically engaged in the blocking insertion hole, and works with the blocking plate to limit and fix the receiving plate, so that the clamping part can play a reliable clamping or limiting role in both states.

[0024] Optionally, a dovetail slide rail is fixedly provided vertically on the screening surface, and anti-loosening screws are fixed at both ends of the dovetail slide rail. A dovetail groove that slides with the dovetail slide rail is opened on the inner side of the receiving plate, and two elastic support pads are fixed on the top surface. A vertically upward-facing baffle plate is fixed on the side of the receiving plate away from the screening surface, and a baffle insertion hole is opened on the baffle plate. When the two connecting plates are in a fixed state, the receiving plate slides up to the state of abutting against the bottom surface of the connecting plate. At this time, the inner side of the baffle plate abuts against the side of the connecting plate away from the screening surface. The clamping hook is elastically inserted into the baffle insertion hole, and the two elastic support pads are respectively inserted into the openings of the first and second discharge pipes.

[0025] By adopting the above technical solution, the dovetail slide rail is fixed vertically on the screening surface. The dovetail groove on the inner side of the receiving plate slides in conjunction with the dovetail slide rail, allowing the receiving plate to rise and fall stably along the screening surface. The anti-detachment screw prevents the receiving plate from falling off the dovetail slide rail. When the receiving plate slides to abut against the bottom surface of the connecting plate, the two elastic support pads on the top surface of the receiving plate respectively engage in the openings of the first and second discharge pipes. This not only uses the elastic support pads to further seal the openings of the first and second discharge pipes, preventing dust and debris from entering the discharge pipes when the machine is stopped, but also uses the barrier plate to further protect the outer ends of the first and second discharge pipes. When the two connecting plates are in a fixed state, the receiving plate slides up to abut against the bottom surface of the connecting plate, and the inner side of the barrier plate abuts against the side of the connecting plate. The clamping hooks elastically engage in the barrier insertion holes, reliably limiting the receiving plate and the connecting plate. This ensures that the entire protective structure remains stable when the machine is stopped, improving the protective reliability of the device during non-operation periods.

[0026] In summary, this application includes the following beneficial technical effects: In this application, three inspection components visually acquire the key quality characteristics of Phillips head screws from different angles and orientations, comprehensively covering the main inspection items of Phillips head screws. This avoids the visual fatigue caused by prolonged observation of small structures during manual visual inspection, effectively reducing the missed inspection rate and false judgment rate. The sorting component automatically classifies and stores the workpieces according to the inspection results, realizing the automatic separation of good products, defective products and workpieces to be re-inspected. The overall device replaces the traditional manual visual inspection method with mechanized automatic feeding, automated rotary conveying, multi-station visual inspection and automatic sorting, which greatly improves the overall efficiency and judgment accuracy of the inspection operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional structural diagram illustrating the installation and cooperation of the drive component and the glass disk in an embodiment of this application; Figure 3 This is a partial structural diagram illustrating the installation and assembly of the sieving components in an embodiment of this application; Figure 4 This is a partial structural diagram illustrating the installation and cooperation of the first and second feed pipes in an embodiment of this application; Figure 5 This is a partial cross-sectional structural diagram illustrating the installation and assembly of the receiving component in an embodiment of this application; Figure 6 This is an exploded structural diagram illustrating the installation distribution of the receiving plate and connecting plate in an embodiment of this application; Figure 7 This is a partial cross-sectional view of an embodiment of the present application illustrating the installation and cooperation of the positioning plug and the positioning slot; Figure 8 This is a partial structural diagram illustrating the installation and mating of the clamping components in an embodiment of this application; Figure 9 This is an exploded structural diagram illustrating the installation distribution of the receiving plate and dovetail slide rail in an embodiment of this application; Figure 10 This is a partial structural diagram illustrating the installation and cooperation of the elastic clamping rod and the clamping hook in an embodiment of this application.

[0028] In the diagram, 1. Base; 11. Glass plate; 111. Annular through hole; 12. Drive component; 13. Support arm; 131. Crossbeam; 14. First support rod; 15. Mounting rod; 151. Extension rod; 16. Second support rod; 17. Third support rod; 18. Dovetail slide rail; 181. Anti-loosening screw; 2. Feeding assembly; 21. Support frame; 22. Vibratory feeder; 23. Linear feeding track; 3. Guide assembly; 31. Correction plate; 32. Limiting plate; 4. First detection component; 41. First camera; 42. First lighting lamp; 5. Second detection component; 51. Second camera; 52. Second lighting lamp; 6. Third detection component; 61. Third camera; 62. Third lighting lamp 7. Lamp; 8. Screening assembly; 9. First collecting hopper; 10. Second collecting hopper; 11. Third collecting hopper; 12. First discharge pipe; 13. Second discharge pipe; 14. Collecting bag; 15. Arc plate; 16. First air blower; 17. Second air blower; 18. Third air blower; 19. Receiving component; 10. Connecting plate; 11. Clearance through hole; 12. Connecting slot; 10. Clamping component; 11. Elastic clamping rod; 12. Clamping hook; 13. Elastic positioning plate; 14. Positioning block; 15. Positioning slot; 16. Receiving plate; 17. Receiving slot; 18. Dovetail groove; 19. Elastic support pad; 20. Barrier plate; 21. Barrier insertion hole. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings.

[0030] Example:

[0031] Reference Figure 1 and Figure 2 A visual inspection and sorting device for fasteners includes a base 1 and a feeding assembly 2. A transparent glass disk 11 is rotatably mounted on the top of the base 1, and a drive component 12 is fixed inside to drive the glass disk 11 to rotate around its own axis. An annular through hole 111 is opened in the middle of the glass disk 11. The drive component 12 is a conventional servo motor, and the output shaft of the servo motor is coaxially and fixedly connected to the glass disk 11. The guide assembly 3, the first detection component 4, the second detection component 5, the third detection component 6, and the sieving assembly 7 are arranged in sequence around the glass disk 11 at the outer edge of the top surface of the base 1. The feeding assembly 2 is located between the guide assembly 3 and the sieving assembly 7. When this device is used, the cross screws are first automatically fed vertically onto the top surface of the glass plate 11 by the feeding component 2, with the nut part abutting against the top surface of the glass plate 11; then the feeding component 3 is used to move the fed cross screws outward to the outer edge of the glass plate 11; the first detection component 4 is used to detect the external thread on the screw part; the second detection component 5 is used to detect the coaxiality of the nut part and the screw part; the third detection component 6 is used to detect the cross groove on the nut part; finally, the sorting component 7 is used to classify and store the workpieces according to the detection results.

[0032] Reference Figure 1 The feeding assembly 2 includes a support frame 21 installed on the vertical side of the base 1, a vibrating plate 22 fixed on the top surface of the support frame 21, and a linear feeding track 23 fixed on the outer edge of the vibrating plate 22. The end of the linear feeding track 23 away from the vibrating plate 22 extends to the glass plate 11 located between the guide assembly 3 and the screening assembly 7. The vibrating plate 22 and the linear feeding track 23 are conventional feeding structures, which will not be described in detail here.

[0033] Reference Figure 3 A support arm 13 is fixedly installed on the top surface of the base 1. A crossbeam 131 located above the glass disk 11 is fixed on the top surface of the support arm 13. The guide assembly 3 includes a correction plate 31 and a limiting plate 32 that are offset and fixed to the bottom surface of the crossbeam 131 in a vertically downward direction. The limiting plate 32 is located on the side of the correction plate 31 away from the axis of the glass disk 11. A guide gap is preset between the limiting plate 32 and the correction plate 31 for the sliding guide of the cross screw on the glass disk 11.

[0034] Reference Figure 2 and Figure 3 A first support rod 14 and a mounting rod 15 are fixed on the top surface of the base 1. The first detection element 4 includes a first camera 41 fixed on the outer periphery of the first support rod 14 and facing the axis of the glass disk 11. An extension rod 151 is fixed on the upper end surface of the mounting rod 15 in the horizontal direction. A first lighting lamp 42 located above the glass disk 11 and facing the first camera 41 is fixed on the bottom surface of the other end of the extension rod 151. The first support rod 14 is fixed on the extension rod 151. A second support rod 16 is fixed on the top surface of the base 1. The second detection component 5 includes a second camera 51 fixed on the upper outer periphery of the second support rod 16 in a vertically downward direction and located above the glass disk 11, and a second lighting lamp 52 fixed on the lower outer periphery of the second support rod 16 in a vertically upward direction and located below the glass disk 11. The second camera 51 is located directly above the second lighting lamp 52. A third support rod 17 is fixed on the top surface of the base 1. The third detection component 6 includes a third camera 61 fixed on the lower outer periphery of the third support rod 17 and located below the glass disk 11 in a vertically upward direction, and two third lights 62 fixed on the outer periphery of the third support rod 17 and located above and below the glass disk 11. The first light 42, the second light 52 and the third light 62 are conventional LED lighting sources. The first camera 41, the second camera 51 and the third camera 61 are all conventional surveillance cameras. The specific structures are not described in detail here.

[0035] Reference Figure 2 and Figure 3 The screening assembly 7 includes a first collection hopper 71 fixed to the top surface of the base 1 for collecting good products, a second collection hopper 72 fixed to the top surface of the base 1 for collecting defective products, and a third collection hopper 73 placed on the top surface of the base 1 for collecting products requiring secondary testing; the base 1 is provided with a first discharge pipe 74 whose inner end is connected to the lower end of the first collection hopper 71, and a second discharge pipe 75 whose inner end is connected to the lower end of the second collection hopper 72. Collection bags 76 can be detachably installed at the openings of the first discharge pipe 74 and the second discharge pipe 75. An arc-shaped plate 77 located above the glass plate 1 is fixed on the top surface of the base 1. A first air blower 771 opening towards the first collection hopper 71, a second air blower 772 opening towards the second collection hopper 72, and a third air blower 773 opening towards the third collection hopper 73 are fixed on the top surface of the arc-shaped plate 77. After the workpiece inspection is completed, if all three inspections are passed, it is considered a good product. The good product is blown into the first collection hopper 71 through the first air blower 771, and falls into the corresponding collection bag 76 after passing through the first discharge pipe 74. If any of the three inspections are unqualified, it is considered a defective product. The defective product is blown into the second collection hopper 72 through the second air blower 772, and falls into the corresponding collection bag 76 after passing through the second discharge pipe 75. If no result is obtained after three inspections, the corresponding workpiece is blown into the third collection hopper 73 through the third air blower 773.

[0036] Reference Figure 4 , Figure 5 , Figure 6 and Figure 7The vertical side of the first discharge pipe 74 facing downwards on the base 1 is the screening surface. A receiving member 8 is provided on the screening surface. The receiving member 8 includes two connecting plates 81 that are rotatably connected to the screening surface by a rotating shaft and located on the side of the first discharge pipe 74 and the second discharge pipe 75 that are far away from each other. The rotating surfaces of the two connecting plates 81 are parallel to the screening surface. Two clearance through holes 811 are provided on the connecting plates 81. The two connecting plates 81 can be rotated to a fixed state facing upwards and to a positioning state that is located below the first discharge pipe 74 and is horizontally close to each other. When the two connecting plates 81 are in the positioning state, clamping parts 82 are provided on the opposite sides of the top surface. Below, an elastic positioning plate 83 with elastic elongation properties is vertically fixed on the side of the connecting plate 81 away from the rotating shaft. A positioning block 831 and a positioning slot 832 are fixed on the side of the elastic positioning plate 83 away from the connecting plate 81. A receiving plate 84 is detachably installed on the lower part of the screening surface in the horizontal direction. Two receiving slots 841 are opened on the top surface of the receiving plate 84. When the device is stopped, the two connecting plates 81 are pre-adjusted to a fixed state, and the two elastic positioning plates 83 are rotated to a horizontal state above the first discharge pipe 74 and the second discharge pipe 75. The positioning block 831 on one of the two elastic positioning plates 83 is inserted into the positioning slot 832 on the other. In this way, the two connecting plates 81 protect the sides of the first discharge pipe 74 and the second discharge pipe 75 that are far apart from each other, and the two elastic positioning plates 83 protect the top of the first discharge pipe 74 and the second discharge pipe 75. When the device is used, the two connecting plates 81 are pre-adjusted to the positioning state, the two elastic positioning plates 83 are rotated to the vertical downward state, the positioning insert 831 is inserted into the receiving slot 841, and the clamping member 82 clamps and fixes the upper edge of the opening of the collection bag 76. The two clearance through holes 811 are located directly below the openings of the first discharge pipe 74 and the second discharge pipe 75, respectively. The two elastic positioning plates 83 are used to separate the two collection bags 76, and the combination of the two connecting plates 81 and the clamping member 82 is used to limit and fix the upper edge of the collection bag 76. At the same time, the top surface of the receiving plate 84 supports the bottom surface of the collection bag 76.

[0037] Reference Figure 8 The clamping member 82 includes an elastic clamping rod 821 with one end rotatably connected to the connecting plate 81 toward the edge of the screening surface and having elastic shortening properties. A clamping hook 822 is fixed on the other end of the elastic clamping rod 821. A connecting slot 812 is opened on the side of the connecting plate 81 away from the screening surface. When the connecting plate 81 is in a fixed state (that is, when the device is in use), the rotating surface of the elastic clamping rod 821 is parallel to the top surface of the base 1. When the connecting plate 81 is in a positioning state, the clamping hook 822 is engaged in the connecting slot 812. Then, the bottom surface of the elastic clamping rod 821 and the top surface of the connecting plate 81 are used to clamp and fix the upper edge of the collection bag 76.

[0038] Reference Figure 8 , Figure 9 and Figure 10 A dovetail slide rail 18 is fixedly installed vertically on the screening surface. Anti-loosening screws 181 are fixedly installed at both ends of the dovetail slide rail 18. A dovetail groove 842 that slides with the dovetail slide rail 18 is opened on the inner side of the receiving plate 84. Two elastic support pads 843 made of rubber are fixedly installed on the top surface. A vertically upward barrier plate 85 is fixedly installed on the side of the receiving plate 84 away from the screening surface. Two barrier holes 851 are opened on the opposite two sides of the barrier plate 85. When the two connecting plates 81 are in a fixed state (i.e., the device is stopped), the receiving plate 84 slides up to abut against the bottom surface of the connecting plate 81. At this time, the inner side of the barrier plate 85 abuts against the side of the connecting plate 81 away from the screening surface. The clamping hook 822 is then elastically inserted into the barrier insertion hole 851, thereby limiting and fixing the receiving plate 84 and the barrier plate 85 in this state. At this time, the two elastic support pads 843 are respectively inserted into the openings of the first discharge pipe 74 and the second discharge pipe 75. The elastic support pads 843 further seal the openings of the first discharge pipe 74 and the second discharge pipe 75, and the barrier plate 85 further protects the outer ends of the first discharge pipe 74 and the second discharge pipe 75.

[0039] The implementation principle of this application embodiment is as follows: When the device is in use: First, slide the receiving plate 84 down to abut against the lower anti-loosening screw 181. Then, adjust the two connecting plates 81 to the positioning state. The two elastic positioning plates 83 then rotate to the vertical downward position. The positioning insert 831 is inserted into the receiving slot 841. At this time, the clamping member 82 clamps and fixes the upper edge of the opening of the collection bag 76. Then, start the drive member 12 and the vibrating plate 22. The cross screw is automatically fed vertically to the top surface of the glass plate 11 through the feeding component 2, so that the nut part abuts against the top surface of the glass plate 11. Then, the guide component 3 is used to move the fed cross screw to the outer edge of the glass plate 11. The first detection component 4 is used to detect the external thread on the screw part. The second detection component 5 is used to detect the coaxiality of the nut part and the screw part. The third detection component 6 is used to detect the cross groove on the nut part. Finally, the sorting component 7 is used to classify and store the workpieces according to the detection results.

[0040] When the device stops: The two connecting plates 81 are pre-adjusted to a fixed state, and the two elastic positioning plates 83 are simultaneously rotated to a horizontal state. The positioning insert 831 on one of the elastic positioning plates 83 is inserted into the positioning slot 832 on the other. This utilizes the two connecting plates 81 to protect the sides of the first discharge pipe 74 and the second discharge pipe 75 that are far apart from each other, and utilizes the two elastic positioning plates 83 to protect the top of the first discharge pipe 74 and the second discharge pipe 75. The receiving plate 84 slides up to abut against the bottom surface of the connecting plate 81. The inner side of the barrier plate 85 abuts against the side of the connecting plate 81 that is far from the screening surface. The elastic clamping rod 821 is manually controlled so that the clamping hook 822 is elastically inserted into the barrier insertion hole 851. The two elastic support pads 843 are then respectively inserted into the openings of the first discharge pipe 74 and the second discharge pipe 75.

[0041] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A visual inspection and sorting device for fasteners, characterized in that, It includes a base (1) and a feeding assembly (2). A transparent glass disk (11) is rotatably mounted on the base (1). A drive unit (12) is fixed inside to drive the glass disk (11) to rotate around its own axis. An annular through hole (111) is opened in the middle of the glass disk (11). The feeding assembly (2) is used to automatically feed the cross screws vertically to the top surface of the glass disk (11). The nut part abuts against the top surface of the glass disk (11). The base (1) is provided with a guide assembly (3) around the glass plate (11) at the outer edge of the top surface, which moves the cross screw after feeding to the outer edge of the glass plate (11), a first detection component (4) for detecting the external thread on the screw part, a second detection component (5) for detecting the coaxiality of the nut part and the screw part, a third detection component (6) for detecting the cross groove on the nut part, and a sieving assembly (7) for classifying and storing the workpieces according to the detection results. The feeding assembly (2) is located between the guide assembly (3) and the sieving assembly (7).

2. The visual inspection and sorting device for fasteners according to claim 1, characterized in that, The feeding assembly (2) includes a support frame (21) installed on the vertical side of the base (1), a vibrating plate (22) fixed on the top surface of the support frame (21), and a linear feeding track (23) fixed on the outer edge of the vibrating plate (22). The end of the linear feeding track (23) away from the vibrating plate (22) extends to the glass plate (11) located between the guide assembly (3) and the screening assembly (7).

3. The visual inspection and sorting device for fasteners according to claim 1, characterized in that, A support arm (13) is fixed on the top surface of the base (1), and a crossbeam (131) located above the glass disk (11) is fixed on the top surface of the support arm (13). The guide assembly (3) includes a correction plate (31) and a limiting plate (32) that are offset and fixed on the bottom surface of the crossbeam (131) in a vertically downward direction. The limiting plate (32) is located on the side of the correction plate (31) away from the axis of the glass disk (11). A guide gap is preset between the limiting plate (32) and the correction plate (31) for the sliding guide of the cross screw on the glass disk (11).

4. The visual inspection and sorting device for fasteners according to claim 1, characterized in that, The base (1) is fixed with a first support rod (14) and a mounting rod (15). The first detection element (4) includes a first camera (41) fixed on the outer periphery of the first support rod (14) and facing the axis of the glass disk (11). An extension rod (151) is fixed on the upper end face of the mounting rod (15) in the horizontal direction. A first lighting lamp (42) located above the glass disk (11) and facing the first camera (41) is fixed on the bottom surface of the other end of the extension rod (151).

5. The visual inspection and sorting device for fasteners according to claim 1, characterized in that, The base (1) is fixed with a second support rod (16) on its top surface. The second detection component (5) includes a second camera (51) fixed on the upper outer periphery of the second support rod (16) and located above the glass plate (11) in a vertically downward direction, and a second light (52) fixed on the lower outer periphery of the second support rod (16) and located below the glass plate (11) in a vertically upward direction. The second camera (51) is located directly above the second light (52).

6. The visual inspection and sorting device for fasteners according to claim 1, characterized in that, The base (1) is fixed with a third support rod (17) on its top surface. The third detection component (6) includes a third camera (61) fixed on the lower outer periphery of the third support rod (17) in a vertical upward direction and located below the glass disk (11), and a third lighting lamp (62) fixed on the outer periphery of the third support rod (17) and located above and below the glass disk (11).

7. The visual inspection and sorting device for fasteners according to claim 1, characterized in that, The sieving assembly (7) includes a first collection hopper (71) fixed on the top surface of the base (1) for collecting good products, a second collection hopper (72) fixed on the top surface of the base (1) for collecting defective products, and a third collection hopper (73) placed on the top surface of the base (1) for collecting products requiring secondary testing; the base (1) is provided with a first discharge pipe (74) whose inner end is connected to the lower end of the first collection hopper (71), and a second discharge pipe (75) whose inner end is connected to the lower end of the second collection hopper (72); Collection bags (76) can be detachably installed at the openings of the first discharge pipe (74) and the second discharge pipe (75). An arc-shaped plate (77) located above the glass plate (11) is fixed on the top surface of the base (1). A first air blower (771) opening towards the first collection hopper (71), a second air blower (772) opening towards the second collection hopper (72), and a third air blower (773) opening towards the third collection hopper (73) are fixed on the top surface of the arc-shaped plate (77).

8. A visual inspection and sorting device for fasteners according to claim 7, characterized in that, The vertical side of the first discharge pipe (74) facing downwards on the base (1) is the screening surface. Two connecting plates (81) located on the side away from each other of the first discharge pipe (74) and the second discharge pipe (75) are connected side by side via a rotating shaft on the screening surface. The rotating surface of the two connecting plates (81) is parallel to the screening surface. Two clearance through holes (811) are opened on the connecting plates (81). The two connecting plates (81) can be rotated to a fixed state facing upwards and to a positioning state located below the first discharge pipe (74) and horizontally close to each other. When the two connecting plates (81) are in the positioning state, clamping parts (82) are provided on the opposite sides of the top surface. Below, an elastic positioning plate (83) with elastic elongation properties is vertically fixed on the side of the connecting plate (81) away from the rotating shaft. A positioning block (831) and a positioning slot (832) are fixed on the side of the elastic positioning plate (83) away from the connecting plate (81). A receiving plate (84) is detachably installed on the lower part of the screening surface in the horizontal direction. Two receiving slots (841) are opened on the top surface of the receiving plate (84). When the two connecting plates (81) are in a fixed state, the two elastic positioning plates (83) rotate towards each other to a horizontal state above the first discharge pipe (74) and the second discharge pipe (75). The positioning block (831) on one of the two elastic positioning plates (83) is inserted into the positioning slot (832) on the other. When the two connecting plates (81) are in a positioning state, the two elastic positioning plates (83) rotate to a vertical downward state. The positioning block (831) is inserted into the receiving slot (841). At this time, the clamping member (82) clamps and fixes the upper edge of the opening of the collection bag (76). The two clearance through holes (811) are located directly below the openings of the first discharge pipe (74) and the second discharge pipe (75), respectively.

9. A visual inspection and sorting device for fasteners according to claim 8, characterized in that, The clamping member (82) includes an elastic clamping rod (821) with one end rotatably connected to the connecting plate (81) toward the edge of the screening surface and having elastic shortening properties. A clamping hook (822) is fixed on the other end of the elastic clamping rod (821). A connecting slot (812) is provided on the side of the connecting plate (81) away from the screening surface. When the connecting plate (81) is in a fixed state, the rotating surface of the elastic clamping rod (821) is parallel to the top surface of the base (1). When the connecting plate (81) is in a positioning state, the clamping hook (822) is engaged in the connecting slot (812).

10. A visual inspection and sorting device for fasteners according to claim 9, characterized in that, A dovetail slide rail (18) is fixedly provided on the vertical direction of the screening surface. Anti-loosening screws (181) are fixed at both ends of the dovetail slide rail (18). A dovetail groove (842) that slides with the dovetail slide rail (18) is opened on the inner side of the receiving plate (84). Two elastic support pads (843) are fixed on the top surface. A vertically upward blocking plate (85) is fixed on the side of the receiving plate (84) away from the screening surface. A blocking insertion hole (851) is opened on the blocking plate (85). When the two connecting plates (81) are in a fixed state, the receiving plate (84) slides up to abut against the bottom surface of the connecting plate (81). At this time, the inner side of the barrier plate (85) abuts against the side of the connecting plate (81) away from the screening surface. The clamping hook (822) is elastically inserted into the barrier insertion hole (851). At this time, the two elastic support pads (843) are respectively inserted into the openings of the first discharge pipe (74) and the second discharge pipe (75).

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