Tapping screw detection device with active feeding mechanism

Abstract

The invention is applied to the technical field of self-tapping screw detection, and particularly discloses a self-tapping screw detection device with an active feeding mechanism, the self-tapping screw detection device comprises two supporting plates which are symmetrically arranged, a bottom plate is fixedly connected between the two supporting plates, and a detection box body is fixedly mounted on the upper surfaces of the supporting plates through a bracket; the detection box body is of a hollow structure with an opening in the lower surface, a detection camera is fixed to the upper surface of the detection box body in a penetrating mode, and a plurality of light supplementing lamps are annularly arranged on the outer surface of the detection camera. According to the self-tapping screw detection device with the active feeding mechanism, lower bearing plates are moved through a conveying belt, so that an upper bearing plate is driven to move to actively feed self-tapping screws to a detection camera at a detection box body for visual detection, and the three lower bearing plates are arranged in a staggered manner, so that the detection efficiency is improved; therefore, the feeding process of the self-tapping screws can be continuously carried out, and the overall detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of self-tapping screw testing technology, specifically to a testing device for self-tapping screws with an active feeding mechanism. Background Technology

[0002] Self-tapping screws are quick-installing fasteners made of steel with a galvanized and passivated surface. They allow for direct threading into the material without pre-drilling, making them a common type of fastener widely used in construction, furniture manufacturing, electronic equipment assembly, automobile manufacturing, and many other fields. Since the quality of self-tapping screws directly affects the overall performance and lifespan of products, they need to be inspected before use. Visual inspection of self-tapping screws utilizes machine vision technology to examine their appearance, dimensions, and other aspects.

[0003] Traditional inspection devices typically use manual feeding, but manual feeding is inefficient and cannot meet the needs of large-scale inspection. In contrast, with automatic feeding inspection devices, a large number of self-tapping screws are fed to the inspection support plate at the same time, which can easily lead to screw accumulation and affect the visibility of the visual inspection camera during the inspection of self-tapping screws. Summary of the Invention

[0004] The purpose of this invention is to provide a detection device for self-tapping screws with an active feeding mechanism, so as to solve the problems mentioned in the background art, such as low efficiency of manual feeding and easy accumulation of self-tapping screws in automatic feeding, which affects the detection of visual inspection cameras.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a detection device for self-tapping screws with an active feeding mechanism, comprising a support plate, two symmetrically arranged support plates, a base plate fixedly connected between the two support plates, a detection box fixedly mounted on the upper surface of the support plate by a bracket, the detection box being a hollow structure with an open lower surface, a detection camera fixedly mounted through the upper surface of the detection box, a plurality of supplementary lights arranged in a ring on the outer surface of the detection camera, a storage box arranged parallel to one side of the detection box, the storage box being fixedly mounted on the upper surface of the support plate by a bracket, the storage box being an open structure, and the inner surface of the storage box... The part has an inverted trapezoidal structure. A discharge pipe is installed through the bottom surface of the storage box. A valve is installed inside the discharge pipe to control its opening and closing. A feeding structure is installed below the detection box. The feeding structure drives the movement of the lower support plate through a conveyor belt to realize the active feeding of the self-tapping screws to be tested. The feeding structure includes a conveyor belt, which is set between two support plates. Two conveyor belts are symmetrically arranged. The two conveyor belts are connected to the same set of rotating shaft surfaces. The rotating shaft of the conveyor belt is connected to the output end of the motor. The motor is fixedly installed on the surface of the support plate. There is a gap between the two conveyor belts. The surface of the conveyor belt is provided with a lower support plate. Preferably, the lower support plate is a box-shaped structure with an open upper surface. Connecting rods are fixedly connected to both sides of the lower support plate. The connecting rods are provided with through mounting blocks. The surface of the mounting blocks is provided with vertical grooves. The connecting rods are slidably connected to the grooves on the surface of the mounting blocks. The lower ends of the two mounting blocks are fixedly connected to the surfaces of the conveyor belts on both sides.

[0006] By adopting the above technical solution, the lower support plate can drive the upper support plate to move, thereby moving the self-tapping screw.

[0007] Preferably, there are three lower support plates, which are staggered on the surface of the conveyor belt, and the three lower support plates have the same structure.

[0008] By adopting the above technical solution, continuous feeding of self-tapping screws can be achieved using three lower support plates.

[0009] Preferably, a support wheel is provided below the lower support plate. The support wheel is rotatably connected to the lower surface of the lower support plate via a telescopic rod. A first spring is provided on the outer surface of the telescopic rod of the support wheel. One end of the first spring is fixed to the lower surface of the lower support plate, and the other end of the first spring is connected to the support wheel. The support wheel is in contact with the surface of the conveyor belt. Four sets of support wheels and first springs are rectangularly arranged on the lower surface of the lower support plate.

[0010] By adopting the above technical solution, the support wheel and the connected No. 1 spring can support the lower support plate while simultaneously enabling the lower support plate to vibrate.

[0011] Preferably, a drive rod is fixedly installed on the surface of the support plate. The drive rod and the connecting rod are set at the same horizontal height as the drive rod. Multiple drive rods are arranged parallel to each other and at equal intervals on the surface of the support plate. The same drive rods are symmetrically arranged on the surfaces of two support plates.

[0012] By adopting the above technical solution, the vibration of the lower support plate can be achieved by utilizing the force exerted by the drive rod on the connecting rod.

[0013] Preferably, the upper surface of the lower support plate is provided with a lifting structure, which enables the self-tapping screw to be detected close to the detection camera through the movement of the upper support plate.

[0014] Using the above technical solution, the lifting structure can be used to lift the upper support plate and self-tapping screws and enable the detection camera to approach for detection.

[0015] Preferably, the lifting structure includes an upper support plate, which is a box-shaped structure with an open upper surface. The lower surface of the upper support plate is fixed to the upper end of a support rod, and the lower end of the support rod is fixed to the bottom surface of a lower support plate. The support rod is a telescopic rod structure, and a second spring is provided on the outer surface of the support rod. One end of the second spring is fixed to the surface of the lower support plate, and the other end of the second spring is fixed to the surface of the upper support plate. Four sets of the support rod and the second spring are rectangularly arranged on the surface of the upper support plate. A slot is fixedly installed on the lower surface of the upper support plate. The slot is a cross-shaped recessed structure, and the slot is aligned with a circular through hole on the bottom surface of the lower support plate. The slot engages with a locking block, and the locking block is fixedly connected to the output end of an electric push rod. The electric push rod is fixedly installed on the upper surface of the base plate.

[0016] By adopting the above technical solution, the distance between the self-tapping screw and the detection camera can be shortened by using the raised upper support plate, thereby increasing the accuracy of the detection image.

[0017] Preferably, the bottom surface of the upper support plate is provided with trapezoidal protrusions, and the bottom surface of the upper support plate is divided into multiple square areas by multiple protrusions. The outer surface of the upper support plate is provided with a contrast structure, which increases the contrast of the self-tapping screws during the visual inspection process through baffles.

[0018] By employing the above technical solution, the contrast structure can be used to increase the contrast during the self-tapping screw inspection process.

[0019] Preferably, the comparison structure includes a baffle, which is a black plate structure. The surface of the baffle is fixed to one end of a No. 3 spring, and the other end of the No. 3 spring is fixed to the outer surface of the upper support plate. Two No. 3 springs are provided on the surface of the baffle and connected to the upper support plate. The upper surface of the baffle is a sloping structure. The baffle and the No. 3 springs are distributed equidistantly in a ring along the outer surface of the upper support plate. One side of the baffle contacts a protrusion. The protrusion is a long strip structure with a trapezoidal cross-section. The protrusion is fixedly installed on the inner surface of the detection box and is distributed in a ring along the inner surface of the detection box.

[0020] By using the above technical solution, the black baffle can increase the image contrast during the self-tapping screw inspection process.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the detection device for self-tapping screws with an active feeding mechanism: 1. In this invention, the lower support plate is moved by a conveyor belt, which in turn moves the upper support plate to actively feed the self-tapping screws to the detection camera at the detection box for visual inspection. The lower support plates are arranged in three staggered positions, which allows the feeding process of the self-tapping screws to continue continuously, thereby improving the overall detection efficiency. Furthermore, the lower support plate is slidably connected to the mounting block on both sides via connecting rods, and drive rods are equidistantly arranged on the surface of the support plate. As the lower support plate moves with the transmission belt, the connecting rods, under the resistance of the drive rods, will drive the lower support plate to move upward. In conjunction with the No. 1 spring on the surface of the lower support plate, the lower support plate will vibrate. At the same time, the No. 2 spring between the lower support plate and the upper support plate will further cause the upper support plate to vibrate. As the self-tapping screws move closer to the detection camera, the vibration will cause the self-tapping screws to be evenly distributed on the surface of the upper support plate, preventing the self-tapping screws from accumulating on the surface of the upper support plate and affecting the detection process of the detection camera. 2. In this invention, the lower support plate and the upper support plate are connected by a support rod with a telescopic structure. During the process of the electric push rod driving the locking block to engage with the locking slot, the upper support plate can be lifted upward and close to the detection box. The outer surface of the upper support plate is equipped with a black baffle connected by a No. 3 spring. When the upper support plate is lifted, the baffle is tilted and attached to the inner wall of the detection box under the action of the protrusion on the inner wall of the detection box. The black baffle increases the contrast of the self-tapping screw during the visual inspection process. With the help of the supplementary light, the detection camera can more clearly identify the details of the self-tapping screw, accurately determine whether there are defects and whether the size meets the standard, and improve the reliability of the inspection. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present invention; Figure 2This is a schematic diagram of the internal structure of the storage box of the present invention; Figure 3 This is a schematic diagram of the lower support plate and upper support plate structure of the present invention; Figure 4 This is a schematic diagram of the lower support plate and conveyor belt structure of the present invention; Figure 5 This is a schematic diagram of the lower support plate and connecting rod structure of the present invention; Figure 6 This is a bottom view of the lower support plate structure of the present invention; Figure 7 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 8 This is a schematic diagram of the upper support plate and slot structure of the present invention; Figure 9 This is a schematic diagram of the upper support plate and baffle structure of the present invention; Figure 10 This is a schematic diagram of the baffle and detection box structure of the present invention.

[0023] In the diagram: 1. Support plate; 2. Base plate; 3. Detection box; 4. Detection camera; 5. Supplemental light; 6. Storage box; 7. Discharge pipe; 8. Conveyor belt; 9. Motor; 10. Lower support plate; 11. Connecting rod; 12. Mounting block; 13. Support wheel; 14. Spring No. 1; 15. Drive rod; 16. Upper support plate; 17. Support rod; 18. Spring No. 2; 19. Slot; 20. Locking block; 21. Electric push rod; 22. Baffle; 23. Spring No. 3; 24. Protrusion. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-10 The present invention provides a technical solution: a detection device for self-tapping screws with an active feeding mechanism, comprising a support plate 1, a base plate 2, a detection box 3, a detection camera 4, a supplementary light 5, a storage box 6, a discharge pipe 7, a conveyor belt 8, a motor 9, a lower support plate 10, a connecting rod 11, a mounting block 12, a support wheel 13, a first spring 14, a drive rod 15, an upper support plate 16, a support rod 17, a second spring 18, a slot 19, a locking block 20, an electric push rod 21, a baffle 22, a third spring 23, and a protrusion 24.

[0026] Two support plates 1 are symmetrically arranged, and a base plate 2 is fixedly connected between the two support plates 1. A detection box 3 is fixedly installed on the upper surface of the support plate 1 by a bracket. The detection box 3 is a hollow structure with an open lower surface. A detection camera 4 is fixedly fixed through the upper surface of the detection box 3. Multiple supplementary lights 5 are arranged in a ring on the outer surface of the detection camera 4. A storage box 6 is arranged parallel to one side of the detection box 3. The storage box 6 is fixedly installed on the upper surface of the support plate 1 by a bracket. The storage box 6 is an open structure, and the interior of the storage box 6 is an inverted trapezoidal structure. A discharge port is provided through the bottom surface of the storage box 6. Pipe 7, the discharge pipe 7 is equipped with a valve to control the opening and closing. The bottom of the detection box 3 is equipped with a feeding structure. The feeding structure drives the lower support plate 10 to move through the conveyor belt 8, thereby realizing the active feeding of the self-tapping screw to be tested. The feeding structure includes a conveyor belt 8, which is set between two support plates 1. Two conveyor belts 8 are symmetrically arranged. The two conveyor belts 8 are connected to the same set of rotating shaft surfaces. The rotating shaft of the conveyor belt 8 is connected to the output end of the motor 9. The motor 9 is fixedly installed on the surface of the support plate 1. There is a gap between the two conveyor belts 8. The surface of the conveyor belt 8 is equipped with a lower support plate 10. like Figure 1 , Figure 2 and Figure 10 As shown, during the visual inspection of self-tapping screws using this device, the self-tapping screw to be inspected is placed inside the storage bin 6. The discharge pipe 7 on the bottom surface of the storage bin 6 controls the dropping of the self-tapping screw. The valve inside the discharge pipe 7 controls the opening and closing of the discharge pipe 7, thereby controlling the downward dropping of the self-tapping screw. Activating the valve inside the discharge pipe 7 causes the self-tapping screw in the storage bin 6 to fall downward onto the surface of the lower support plate 10. The motor 9 is started, and the motor 9 drives the conveyor belt 8 to rotate. The rotating conveyor belt 8 moves the lower support plate 10 on the surface, and the lower support plate 10 moves the self-tapping screw on the surface to the bottom of the inspection box 3. By lifting the self-tapping screw, it is brought closer to the inspection camera 4 inside the inspection box 3. The supplementary light 5 is activated to increase the visibility inside the inspection box 3. The inspection camera 4 is then activated to perform visual inspection of the self-tapping screw.

[0027] The lower support plate 10 is a box-shaped structure with an open upper surface. Connecting rods 11 are fixedly connected to both sides of the lower support plate 10. The connecting rods 11 pass through mounting blocks 12. Vertical grooves are provided on the surface of the mounting blocks 12. The connecting rods 11 are slidably connected to the grooves on the surface of the mounting blocks 12. The lower ends of the two mounting blocks 12 are fixedly connected to the surfaces of the conveyor belts 8 on both sides. Three lower support plates 10 are provided, staggered on the surface of the conveyor belts 8. The three lower support plates 10 have identical structures. Support wheels 13 are provided below the lower support plates 10, and the support wheels 13 are connected to the lower support plates via telescopic rods. The lower surface of the support plate 10 is rotatably connected. A first spring 14 is provided on the outer surface of the telescopic rod of the support wheel 13. One end of the first spring 14 is fixed to the lower surface of the lower support plate 10, and the other end of the first spring 14 is connected to the support wheel 13. The support wheel 13 and the surface of the conveyor belt 8 are in contact. Four sets of support wheels 13 and first springs 14 are rectangularly arranged on the lower surface of the lower support plate 10. A drive rod 15 is fixedly installed on the surface of the support plate 1. The drive rod 15 and the connecting rod 11 are set at the same horizontal height as the drive rod 15. Multiple drive rods 15 are arranged parallel and equidistantly on the surface of the support plate 1. The same drive rods 15 are symmetrically arranged on the surfaces of the two support plates 1. like Figure 3 , Figure 4 and Figure 7 As shown, when the conveyor belt 8 starts, the conveyor belt 8 drives the mounting block 12 on the surface to move, and the mounting block 12 drives the connecting rod 11 to move. The connecting rods 11 on both sides drive the lower support plate 10 to move along the transmission direction of the conveyor belt 8. As the lower support plate 10 moves, the support wheel 13 under the lower support plate 10 rotates on the surface of the conveyor belt 8. The support wheel 13 supports the movement of the lower support plate 10. When the connecting rod 11 moves with the lower support plate 10, the connecting rod 11 contacts the drive rod 15. Under the resistance of the drive rod 15, the connecting rod 11 is resisted by the drive rod 15, causing the connecting rod 11 to slide upward on the groove on the surface of the mounting block 12, thereby driving the lower support plate 10 to move upward and causing the first spring 14 connected to the support wheel 13 to stretch. Under the action of the multiple parallel drive rods 15, the lower support plate 10 vibrates up and down.

[0028] The upper surface of the lower support plate 10 is provided with a lifting structure. The lifting structure realizes the proximity detection of the self-tapping screw and the detection camera 4 through the moving upper support plate 16. The lifting structure includes the upper support plate 16, which is a box-shaped structure with an open upper surface. The lower surface of the upper support plate 16 is fixed to the upper end of the support rod 17, and the lower end of the support rod 17 is fixed to the bottom surface of the lower support plate 10. The support rod 17 is a telescopic rod structure, and a second spring 18 is provided on the outer surface of the support rod 17. One end of the second spring 18 is connected to the lower support plate 10. The surface of the upper support plate 16 is fixed, and the other end of the second spring 18 is fixed to the surface of the upper support plate 16. The support rod 17 and the second spring 18 are rectangularly arranged in four sets on the surface of the upper support plate 16. The lower surface of the upper support plate 16 is fixedly installed with a slot 19. The slot 19 has a cross-shaped recessed structure. The slot 19 is aligned with the circular through hole on the bottom surface of the lower support plate 10. The slot 19 is engaged and matched with the locking block 20. The locking block 20 is fixedly connected to the output end of the electric push rod 21. The electric push rod 21 is fixedly installed on the upper surface of the base plate 2. like Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, when the lower support plate 10 moves the upper support plate 16 to below the detection box 3, the electric push rod 21 is activated. The electric push rod 21 drives the locking block 20 upward through the circular through hole on the bottom surface of the lower support plate 10 and engages with the locking slot 19, thereby lifting the upper support plate 16 upward. The upper support plate 16 moves upward at the bottom of the lower support plate 10, causing the support rod 17 to extend and stretch the second spring 18. The raised upper support plate 16, with its self-tapping screws on the surface, rises and touches the detection box 3. Recently, since the lower support plate 10 and the upper support plate 16 are connected by the support rod 17 and the second spring 18, when the lower support plate 10 moves, the lower support plate 10 and the upper support plate 16 will vibrate up and down due to the action of the second spring 18. The vibration of the upper support plate 16 on the self-tapping screws supported on the surface makes the self-tapping screws evenly distributed on the surface of the upper support plate 16, preventing the self-tapping screws from accumulating and affecting the visibility of the detection camera 4.

[0029] The bottom surface of the upper support plate 16 is provided with trapezoidal protrusions, and the bottom surface of the upper support plate 16 is divided into multiple square areas by multiple protrusions. The outer surface of the upper support plate 16 is provided with a contrast structure. The contrast structure increases the contrast of the self-tapping screws in the visual inspection process through the baffle 22. The contrast structure includes the baffle 22, which is a black plate structure. The surface of the baffle 22 is fixed to one end of the No. 3 spring 23, and the other end of the No. 3 spring 23 is fixed to the outer surface of the upper support plate 16. Two No. 3 springs 23 are provided on the surface of the baffle 22 and connected to the upper support plate 16. The upper surface of the baffle 22 is a sloping structure. The baffle 22 and the No. 3 spring 23 are distributed equidistantly in a ring along the outer surface of the upper support plate 16. One side of the baffle 22 is in contact with the protrusion 24. The protrusion 24 is a long strip structure with a trapezoidal cross section. The protrusion 24 is fixedly installed on the inner surface of the detection box 3 and is distributed in a ring along the inner surface of the detection box 3. like Figure 9 and Figure 10 As shown, when the self-tapping screws fall onto the surface of the upper support plate 16, they are initially separated by the division of multiple protrusions to prevent a large accumulation of self-tapping screws. Under the action of the vibrating upper support plate 16, the self-tapping screws are further separated to prevent accumulation. During the lifting process of the upper support plate 16, the upper support plate 16 drives the baffle 22 on the outer surface to be inserted into the inner surface of the detection box 3. The slope of the upper surface of the baffle 22 contacts the protrusion 24, and under the pressure of the protrusion 24, the baffle 22 tilts on the outer surface of the upper support plate 16 and contacts the inner surface of the detection box 3. During this process, the baffle 22 compresses the No. 3 spring 23. The black baffle 22 increases the contrast between the self-tapping screws and the inner surface of the detection box 3 on the outer surface of the upper support plate 16, thereby increasing the detection quality of the self-tapping screws.

[0030] Working principle: The motor 9 is started, driving the conveyor belt 8 to start, opening the valve of the discharge pipe 7, allowing the self-tapping screws to fall onto the surface of the upper support plate 16. When the conveyor belt 8 runs, it moves the mounting block 12 on the surface. Through the mounting block 12 and the connecting rod 11, the lower support plate 10 can move. Under the action of the drive rods 15 on both sides, the lower support plate 10 vibrates up and down. The self-tapping screws move with the lower support plate 10 to below the detection box 3, activating the electric push rod 21, which drives... The locking block 20 engages with the locking slot 19, causing the upper support plate 16 to lift upwards on the surface of the lower support plate 10. As the upper support plate 16 rises, the self-tapping screw gradually approaches the detection camera 4, activating the detection camera 4 to acquire images and transmit the image information to the connected image analysis system for visual inspection of the self-tapping screw. Simultaneously, the upper support plate 16 causes the black baffle 22 on its outer surface to contact the inner surface of the detection box 3. The black baffle 22 contrasts with the self-tapping screw, increasing the detection quality of the detection camera 4.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A detection device for self-tapping screws with an active feeding mechanism, comprising a support plate (1), wherein two support plates (1) are symmetrically arranged, and a base plate (2) is fixedly connected between the two support plates (1), characterized in that: The upper surface of the support plate (1) is fixedly mounted with a detection box (3) by a bracket. The detection box (3) is a hollow structure with an open lower surface. A detection camera (4) is fixedly mounted through the upper surface of the detection box (3). Multiple supplementary lights (5) are arranged in a ring on the outer surface of the detection camera (4). A storage box (6) is arranged parallel to one side of the detection box (3). The storage box (6) is fixedly mounted on the upper surface of the support plate (1) by a bracket. The storage box (6) is an open structure, and the interior of the storage box (6) is an inverted trapezoidal structure. A discharge pipe (7) is installed through the bottom surface of the storage box (6). A valve is installed inside the discharge pipe (7). The opening and closing are controlled. A feeding structure is provided below the detection box (3). The feeding structure drives the movement of the lower support plate (10) through the conveyor belt (8) to realize the active feeding of the self-tapping screw to be tested. The feeding structure includes a conveyor belt (8). The conveyor belt (8) is set between two support plates (1). Two conveyor belts (8) are symmetrically arranged. The two conveyor belts (8) are connected to the same set of rotating shaft surfaces. The rotating shaft of the conveyor belt (8) is connected to the output end of the motor (9). The motor (9) is fixedly installed on the surface of the support plate (1). There is a gap between the two conveyor belts (8). The surface of the conveyor belt (8) is provided with a lower support plate (10).

2. The detection device for self-tapping screws with an active feeding mechanism according to claim 1, characterized in that: The lower support plate (10) is a box-shaped structure with an open upper surface. Connecting rods (11) are fixedly connected to both sides of the lower support plate (10). The connecting rods (11) pass through the mounting blocks (12). The surface of the mounting blocks (12) is provided with vertical grooves. The connecting rods (11) are slidably connected to the grooves on the surface of the mounting blocks (12). The lower ends of the two mounting blocks (12) are fixedly connected to the surfaces of the conveyor belts (8) on both sides.

3. The detection device for self-tapping screws with an active feeding mechanism according to claim 2, characterized in that: There are three lower support plates (10), which are staggered on the surface of the conveyor belt (8). The three lower support plates (10) have the same structure.

4. The detection device for self-tapping screws with an active feeding mechanism according to claim 1, characterized in that: A support wheel (13) is provided below the lower support plate (10). The support wheel (13) is rotatably connected to the lower surface of the lower support plate (10) through a telescopic rod. A first spring (14) is provided on the outer surface of the telescopic rod of the support wheel (13). One end of the first spring (14) is fixed to the lower surface of the lower support plate (10), and the other end of the first spring (14) is connected to the support wheel (13). The support wheel (13) is in contact with the surface of the conveyor belt (8). The support wheel (13) and the first spring (14) are rectangularly arranged in four sets on the lower surface of the lower support plate (10).

5. A detection device for self-tapping screws with an active feeding mechanism according to claim 4, characterized in that: A drive rod (15) is fixedly installed on the surface of the support plate (1). The drive rod (15) and the connecting rod (11) are set at the same horizontal height as the drive rod (15). Multiple drive rods (15) are set parallel and equidistantly on the surface of the support plate (1). The same drive rods (15) are symmetrically arranged on the surfaces of two support plates (1).

6. A detection device for self-tapping screws with an active feeding mechanism according to claim 1, characterized in that: The upper surface of the lower support plate (10) is provided with a lifting structure, which realizes the proximity detection of the self-tapping screw and the detection camera (4) through the moving upper support plate (16).

7. A detection device for self-tapping screws with an active feeding mechanism according to claim 6, characterized in that: The lifting structure includes an upper support plate (16), which is a box-shaped structure with an open upper surface. The lower surface of the upper support plate (16) is fixed to the upper end of a support rod (17), and the lower end of the support rod (17) is fixed to the bottom surface of a lower support plate (10). The support rod (17) is a telescopic rod structure. A second spring (18) is provided on the outer surface of the support rod (17). One end of the second spring (18) is fixed to the surface of the lower support plate (10), and the other end of the second spring (18) is fixed to the surface of the upper support plate (16). The support rod (17) and the second spring (18) are rectangularly arranged in four sets on the surface of the upper support plate (16). The lower surface of the upper support plate (16) is fixedly installed with a slot (19). The slot (19) is a cross-shaped recessed structure. The slot (19) is aligned with the circular through hole on the bottom surface of the lower support plate (10). The slot (19) is engaged and matched with the locking block (20). The locking block (20) is fixedly connected to the output end of the electric push rod (21). The electric push rod (21) is fixedly installed on the upper surface of the base plate (2).

8. A detection device for self-tapping screws with an active feeding mechanism according to claim 6, characterized in that: The bottom surface of the upper support plate (16) is provided with trapezoidal protrusions, and the bottom surface of the upper support plate (16) is divided into multiple square areas by multiple protrusions. The outer surface of the upper support plate (16) is provided with a contrast structure, and the contrast structure increases the contrast of the self-tapping screws in the visual inspection process through the baffle (22).

9. A detection device for self-tapping screws with an active feeding mechanism according to claim 8, characterized in that: The comparison structure includes a baffle (22), which is a black plate structure. The surface of the baffle (22) is fixed to one end of a No. 3 spring (23), and the other end of the No. 3 spring (23) is fixed to the outer surface of the upper support plate (16). Two No. 3 springs (23) are provided on the surface of the baffle (22) and connected to the upper support plate (16). The upper surface of the baffle (22) is a sloping structure. The baffle (22) and the No. 3 spring (23) are distributed equidistantly in a ring along the outer surface of the upper support plate (16). One side of the baffle (22) is in contact with a protrusion (24). The protrusion (24) is a long strip structure with a trapezoidal cross section. The protrusion (24) is fixedly installed on the inner surface of the detection box (3). The protrusion (24) is distributed in a ring along the inner surface of the detection box (3).

Images