Optical inspection equipment and method for sealing rings based on internal support rotation

Abstract

This invention relates to the field of visual inspection technology for sealing rings, specifically to an optical inspection device and method for sealing rings based on internal support rotation. The device includes: a stepping rotating frame with multiple tensioning structures connected to each tensioning structure, and a detection drive wheel with a recessed portion in the center of each drive wheel; a visual inspection module for inspecting the sealing ring tensioned by the drive wheel; the visual inspection module can perform multiple inspection actions on the sealing ring, and the traction structure, in conjunction with a guide groove, allows the sealing ring to be twisted at a certain angle, repositioning it so that it faces the inspection module, allowing the visual inspection module to perform inspection actions again, ensuring a more comprehensive inspection of the sealing ring and improving the inspection effect.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology for sealing rings, specifically to an optical inspection device and method for sealing rings based on the rotation of an inner support. Background Technology

[0002] In existing optical inspection technologies for sealing rings, to balance cycle time and cost, production lines generally adopt a "top-and-bottom opposing camera" layout: two sets of cameras are positioned perpendicular to the end face of the sealing ring, capturing images simultaneously from above and below, and completing a full circumference scan with a single rotation. This solution is highly efficient in identifying defects on the upper and lower surfaces (burrs, missing glue, bubbles, scratches), and the algorithm is mature and has been widely accepted in the industry.

[0003] However, sealing rings are typical three-dimensional rotating parts, and their key defects are not only distributed on the upper and lower annular end faces; burrs, cracks, die-cutting residues, lateral scratches, and minor defects in the lip are often located in the side wall area in the width direction. Due to the limitations of optical depth of field and viewing angle, the optical axis of the top and bottom facing cameras has an angle of nearly 90° with the side wall. The side information appears as "compressed edges" on the image plane, with low grayscale contrast, and is easily masked by reflections from the upper and lower surfaces. Even with supplementary lighting or multiple exposures, it is impossible to obtain sufficient resolution and signal-to-noise ratio.

[0004] More importantly, the sealing ring is mostly made of black or dark-colored rubber with extremely low surface reflectivity. The scattering signal of microscopic defects on the sidewall is weak, and traditional coaxial or ring illumination is difficult to effectively enhance the features, resulting in a high rate of missed detection of side defects, which greatly affects the detection accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide an optical inspection device and method for sealing rings based on internal support rotation, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] Optical inspection equipment for sealing rings based on internal support rotation includes:

[0008] A stepping rotary frame is provided with multiple sets of tensioning structures. Each set of tensioning structures is connected to two sets of detection drive wheels. The detection drive wheels have a recessed portion in the middle, and one set of detection drive wheels can rotate.

[0009] The vision inspection module is provided in two sets, which are arranged opposite to each other, and are used to inspect the sealing ring that is tensioned by the detection drive wheel;

[0010] Two sets of annular grooves are provided and located within the recessed portion;

[0011] Multiple sets of through holes are provided along the circumferential direction of the annular groove located at the lower part;

[0012] The base is detachably connected to the lower end of the detection drive wheel. Multiple sets of ejector parts that can pass through the through hole are slidably installed on the base in a circumferential manner. The ejector parts are provided with guide grooves.

[0013] A traction structure connects to the base and passes through the shaft of the detection drive wheel. The traction structure cooperates with the guide groove and can drive multiple sets of ejector parts to move toward the outside of the detection drive wheel, so that the sealing ring switches between two sets of annular grooves.

[0014] The optical inspection device for sealing rings based on internal support rotation as described above: the stepping rotary frame includes a support plate and a stepping motor connected to the support plate, the stepping motor being able to drive the support plate to rotate step by step;

[0015] The tensioning structure is installed on the support plate and includes a slide rail fixedly installed on the support plate. A first drive arm and a second drive arm are provided on the slide rail. The ends of the first drive arm and the second drive arm away from the slide rail are rotatably connected to the detection drive wheel.

[0016] A cylinder is fixedly installed on the support plate, and the actuating end of the cylinder is connected to the second drive arm.

[0017] As described above, the optical inspection device for sealing rings based on internal support rotation has a first drive motor fixedly mounted on the second drive arm, and the output shaft of the first drive motor is connected to the shaft of the inspection drive wheel via a toothed belt.

[0018] As described above, the optical inspection device for sealing rings based on internal support rotation has an inclined surface at one end of the ejector and a sliding connection at the bottom of the ejector, which is slidably connected to the guide portion provided on the base.

[0019] The guide groove includes an inclined groove and a vertical groove disposed on the ejector. When the pulling structure moves along the inclined groove, the ejector can move outward toward the detection drive wheel along the length direction of the guide portion.

[0020] As described above, the optical inspection device for sealing rings based on internal support rotation includes a first electric telescopic rod fixedly installed on the tensioning structure and a connecting shaft detachably connected to the actuating end of the first electric telescopic rod. A traction member is provided at the end of the connecting shaft away from the first electric telescopic rod, and a convex shaft that can slide in the guide groove is rotatably installed on the traction member.

[0021] The pulling member is connected to a limiting shaft, and the limiting shaft is slidably connected to a connecting sleeve disposed on the base.

[0022] The optical inspection device for sealing rings based on internal support rotation, as described above, also includes:

[0023] A drive assembly is connected to the tensioning structure, and a connecting plate is provided on the drive assembly, which can move along the tensioned sealing ring;

[0024] A first clamping roller and a second clamping roller are provided. The first clamping roller is rotatably mounted on the connecting plate, and the second clamping roller is connected to a bidirectional drive structure provided on the connecting plate. Damping washers are provided on the rotating shafts of both the first clamping roller and the second clamping roller.

[0025] As described above, the optical inspection device for sealing rings based on internal support rotation includes a drive assembly comprising a bracket connected to the tensioning structure and a first linear drive module mounted on the bracket. The first linear drive module is provided with a sliding member, and a guide shaft is mounted on the sliding member.

[0026] The drive assembly further includes a telescopic arm assembly disposed on the sliding member, the telescopic arm assembly being slidably connected to the guide shaft, and the telescopic arm assembly being connected to a third electric telescopic rod disposed on the sliding member.

[0027] As described above, the optical inspection device for sealing rings based on internal support rotation includes a telescopic arm assembly comprising a connecting arm slidably connected to the guide shaft and fixedly connected to the third electric telescopic rod. A telescopic arm is slidably mounted on the connecting arm, the telescopic arm is connected to the connecting plate, and the telescopic arm is connected to a second electric telescopic rod mounted on the connecting arm.

[0028] As described above, the optical inspection device for sealing rings based on internal support rotation has two sets of sliding grooves symmetrically arranged on the connecting plate. A slider is slidably installed in the sliding groove, and the slider is rotatably connected to the second clamping roller.

[0029] The bidirectional drive structure includes a drive device fixedly mounted on the connecting plate. A turntable is connected to the output shaft of the drive device. Two sets of fitting shafts are symmetrically mounted on the turntable. The fitting shafts are slidably connected to the fitting grooves provided on the slider.

[0030] The optical inspection device for sealing rings based on internal support rotation as described above: A method for inspecting sealing rings using the optical inspection device for sealing rings based on internal support rotation as described above includes the following steps:

[0031] Step 1: The tensioning structure moves the two sets of detection drive wheels away from each other to grip the sealing ring to be tested;

[0032] Step 2: The stepper rotating frame rotates to switch the position of the gripped sealing ring, placing it between the two sets of vision inspection modules;

[0033] Step 3: The drive assembly drives the connecting plate to move, so that the two sets of first clamping rollers are located on both sides of the sealing ring to be tested. Then, the bidirectional drive structure drives the second clamping roller to move toward the first clamping roller and clamp the sealing ring to be tested.

[0034] Step 4: The drive assembly drives the connecting plate to move along the length of the sealing ring to be tested, so that one side of the sealing ring tightens and the other side of the sealing ring releases.

[0035] Step 5: Detect the rotation of the drive wheel, which drives the sealing ring to rotate, and perform the detection action;

[0036] Step Six: The pulling structure cooperates with the guide groove to drive the sealing ring to be tested from the lower annular groove to the upper annular groove, and the testing action is performed again.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] By using the annular groove, through hole, base and pulling structure, the visual inspection module can complete the inspection of the sealing ring on both sides. After the module completes the inspection of the sealing ring on both sides, the ejector can eject the sealing ring and switch it from the lower annular groove to the upper annular groove. This allows the sealing ring to be rotated at a certain angle as a whole, so that the area originally on the side of the sealing ring can be switched to the area facing the visual inspection module. This ensures that the visual inspection module can perform a more comprehensive inspection of the sealing ring, ensuring the completeness and accuracy of the inspection.

[0039] By configuring the drive assembly, the first clamping roller, and the second clamping roller, when the sealing ring is transferred to the detection drive wheel and twists, the first clamping roller and the second clamping roller can cooperate to stretch one side of the sealing ring and release the other side. This reduces the contact force and friction between the twisted side of the sealing ring and the detection drive wheel, and weakens the degree of twist by utilizing the elastic force of the sealing ring itself. This ensures that when the sealing ring rotates with the detection drive wheel, the detection accuracy will not decrease due to the sealing ring being in a large degree of twist. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a sealing ring optical inspection device based on internal support rotation.

[0041] Figure 2 This is a schematic diagram of the stepping rotating frame and tensioning structure in an optical inspection device for sealing rings based on internal support rotation.

[0042] Figure 3This is a schematic diagram of the stepping rotating frame and tensioning structure from another angle in an optical inspection device for sealing rings based on internal support rotation.

[0043] Figure 4 This is a schematic diagram of the tensioning structure in an optical inspection device for a sealing ring based on internal support rotation.

[0044] Figure 5 This is a schematic diagram of the detection drive wheel and the first electric telescopic rod in an optical inspection device for a sealing ring based on internal support rotation.

[0045] Figure 6 This is an exploded view of the structure of the detection drive wheel, first electric telescopic rod, base, and connecting shaft in an optical inspection device for sealing rings based on internal support rotation.

[0046] Figure 7 This is a structural diagram of the connecting shaft, tensioning component, and base in an optical inspection device for a sealing ring based on internal support rotation.

[0047] Figure 8 This is a schematic diagram of the ejector component in an optical inspection device for a sealing ring based on internal support rotation.

[0048] Figure 9 This is a schematic diagram of the drive assembly in an optical inspection device for a sealing ring based on internal support rotation.

[0049] Figure 10 This is a schematic diagram of the drive component in an optical inspection device for a sealing ring based on internal support rotation, taken from another angle.

[0050] Figure 11 This is a schematic diagram of the bidirectional drive structure in an optical inspection device for a sealing ring based on internal support rotation.

[0051] Figure 12 This is a schematic diagram of the bidirectional drive structure in an optical inspection device for a sealing ring based on internal support rotation, taken from another angle.

[0052] Figure 13 This is a schematic diagram of the transfer structure in an optical inspection device for a sealing ring based on internal support rotation.

[0053] Figure 14 This is a schematic diagram of the traction structure in an optical inspection device for a sealing ring based on internal support rotation.

[0054] In the diagram: 1. Support plate; 2. Stepper motor; 3. Slide rail; 4. Cylinder; 5. First drive arm; 6. Second drive arm; 7. Detection drive wheel; 701. Through hole; 702. Annular groove; 8. Toothed belt; 9. First drive motor; 10. First electric telescopic rod; 11. Connecting shaft; 12. Pulling component; 1201. Protruding shaft; 13. Limiting shaft; 14. Connecting sleeve; 15. Base; 1501. Guide part; 16. Ejector part; 1601. Inclined surface; 1602. Sliding connection part; 1603. Inclined groove; 1604. Vertical groove; 17. Bracket; 18. First linear drive mold Group; 19. Sliding component; 1901. Guide shaft; 20. Connecting arm; 21. Telescopic arm; 22. Second electric telescopic rod; 2201. Third electric telescopic rod; 23. Connecting plate; 2301. Slide groove; 24. First clamping roller; 25. Second clamping roller; 26. Drive device; 27. Slider; 2701. Fitting groove; 28. Damping washer; 29. ​​Turntable; 2901. Fitting shaft; 30. Support bracket; 31. Fourth electric telescopic rod; 32. Constraint component; 33. Second linear drive module; 34. Fifth electric telescopic rod; 35. Second drive motor; 36. Ejector pin; 37. Storage tray. Detailed Implementation

[0055] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0056] Please see Figures 1-14 As an embodiment of the present invention, the optical inspection device for the sealing ring based on the rotation of the inner support includes: a stepping rotating frame, a vision inspection module, an annular groove 702, a through hole 701, a base 15, and a traction structure.

[0057] It should be noted that the stepping rotary frame and the vision inspection module are both mounted on the frame structure, and the frame structure is also equipped with a traction structure and a transfer structure. The traction structure includes a storage tray 37 and a second linear drive module 33 fixedly mounted on the frame structure. A fifth electric telescopic rod 34 is fixed on the second linear drive module 33. A second drive motor 35 is connected to the actuating end of the fifth electric telescopic rod 34, and a pin 36 is connected to the output shaft of the second drive motor 35.

[0058] The transfer structure includes a support frame 30 connected to the frame structure, a fourth electric telescopic rod 31 connected to the support frame 30, and a constraint member 32 connected to the moving end of the fourth electric telescopic rod 31.

[0059] In this embodiment, initially, the fourth electric telescopic rod 31 drives the constraint member 32 to move downwards until the upper surface of the constraint member 32 is coplanar with the upper surface of the storage tray 37. After the sealing ring is produced, it is picked up by the robot and placed on the storage tray 37. At this time, the fifth electric telescopic rod 34 drives the ejector pin 36 to move downwards until the lower end of the ejector pin 36 abuts against the upper surface of the storage tray 37, and the ejector pin 36 is placed inside the sealing ring. Then, the second linear drive module 33 drives the ejector pin 36 to move laterally, so as to transfer the sealing ring from the storage tray 37 to the constraint member 32. The constraint member 32 is flat. When the sealing ring is pulled into the constraint member 32, the sealing ring can be constrained into a flat circle. Then, the second drive motor 35 can drive the ejector pin 36 to deflect, so that when the fourth electric telescopic rod 31 drives the constraint member 32 to move upwards, it will not interfere with the ejector pin 36. This can shorten the time for the constraint member 32 to wait for the ejector pin 36 to reset before moving again, and improve the detection frequency.

[0060] Furthermore, when the constraint member 32 rises to the end of its stroke, the two sets of detection drive wheels 7 can be inside the sealing ring, and the lower end face of the detection drive wheel 7 is coplanar with the upper surface of the constraint member 32. At this time, when the two sets of detection drive wheels 7 move away from each other, they can tension the sealing ring and guide it into the recess.

[0061] Please see Figures 2-4 The stepping rotating frame is provided with multiple sets of tensioning structures, and each set of tensioning structures is connected to two sets of detection drive wheels 7. The detection drive wheels 7 have a recessed part in the middle, and one set of detection drive wheels 7 can rotate.

[0062] The vision inspection module is provided in two sets, which are arranged opposite to each other, and are used to inspect the sealing ring that is tensioned by the detection drive wheel 7;

[0063] The stepping rotating frame includes a support plate 1 and a stepping motor 2 connected to the support plate 1. The stepping motor 2 can drive the support plate 1 to rotate step by step.

[0064] The tensioning structure is installed on the support plate 1, including a slide rail 3 fixedly installed on the support plate 1. A first drive arm 5 and a second drive arm 6 are provided on the slide rail 3. The ends of the first drive arm 5 and the second drive arm 6 away from the slide rail 3 are rotatably connected to the detection drive wheel 7. Specifically, the first drive arm 5 is fixedly installed on the slide rail 3, and the second drive arm 6 is slidably installed on the slide rail 3.

[0065] A cylinder 4 is fixedly installed on the support plate 1, and the actuating end of the cylinder 4 is connected to the second drive arm 6.

[0066] A first drive motor 9 is fixedly mounted on the second drive arm 6, and the output shaft of the first drive motor 9 is connected to the shaft of the detection drive wheel 7 through a toothed belt 8.

[0067] In this embodiment, in the initial state, the cylinder 4 will drive the second drive arm 6 to move toward the first drive arm 5, so that the distance between the two sets of detection drive wheels 7 is smaller, so that when the sealing ring is pushed up, the two sets of detection drive wheels 7 can be stably located inside the sealing ring.

[0068] When the lower end face of the detection drive wheel 7 is coplanar with the upper surface of the constraint member 32, the cylinder 4 will drive the second drive arm 6 away from the first drive arm 5. At this time, the two sets of detection drive wheels 7 can produce a tensioning effect on the sealing ring and make the two ends of the sealing ring move along the side of the detection drive wheel 7 into the recessed part. At this time, the two sets of detection drive wheels 7 complete the stable gripping of the sealing ring.

[0069] After the detection drive wheel 7 finishes gripping the sealing ring, the first drive motor 9 will drive one of the detection drive wheels 7 to rotate through the toothed belt 8. The sealing ring is fitted between the two sets of detection drive wheels 7, so that the sealing ring can rotate accordingly. During the movement of the sealing ring, the vision detection module can perform real-time detection and avoid the detection drive wheel 7 from blocking the sealing ring, which would cause some parts of the sealing ring to be undetectable.

[0070] Please see Figures 4-8 The annular groove 702 is provided in two sets and is located within the recessed portion;

[0071] Multiple sets of through holes 701 are provided along the circumferential direction of the annular groove 702 located at the lower part;

[0072] The base 15 is detachably connected to the lower end of the detection drive wheel 7. Multiple sets of ejector parts 16 that can pass through the guide hole 701 are slidably installed on the base 15 in a circumferential manner. Each ejector part 16 is provided with a guide groove. One end of the ejector part 16 is provided with an inclined surface 1601, and the bottom of the ejector part 16 is provided with a sliding connection part 1602. The sliding connection part 1602 is slidably connected to the guide part 1501 provided on the base 15.

[0073] The guide groove includes an inclined groove 1603 and a vertical groove 1604 disposed on the ejector 16. When the pulling structure moves along the inclined groove 1603, the ejector 16 can move towards the outside of the detection drive wheel 7 along the length direction of the guide portion 1501.

[0074] In this embodiment, when the two sets of detection drive wheels 7 move away from each other and the sealing ring is transferred from the constraint member 32 to the recess, the sealing ring will be in the annular groove 702 at the bottom of the recess. At this time, when the detection drive wheel 7 rotates and drives the sealing ring to rotate one revolution, the pulling structure can be activated and move sequentially along the vertical groove 1604 and the inclined groove 1603, so that the ejector 16 will move towards the outside of the detection drive wheel 7. During this process, the inclined surface 1601 on the ejector 16 is in a state of abutting against the sealing ring, which allows the sealing ring to be pushed out by the inclined surface 1601 as the ejector 16 is pushed out. An upward force is generated, causing the sealing ring to switch from the lower annular groove 702 to the upper annular groove 702, and to twist at a certain angle. For the two sets of detection drive wheels 7, the action of the ejector 16 is synchronized, that is, both ends of the sealing ring are pushed upward, causing both ends of the sealing ring to twist at a certain angle evenly. When both ends of the sealing ring twist at a certain angle, the entire sealing ring will twist at a certain angle. This allows the vision detection module to detect the original side position of the sealing ring during the subsequent rotation of the sealing ring, improving detection accuracy.

[0075] The aforementioned angle is preferably 90°. For sealing rings with different cross-sectional radii, the aforementioned angle can be adjusted by replacing the detection drive wheel 7 to ensure that the rotation angle during the sealing ring switching process is within a certain range.

[0076] The pulling structure connects to the base 15 and passes through the rotating shaft of the detection drive wheel 7. The pulling structure cooperates with the guide groove and can drive multiple sets of ejector parts 16 to move toward the outside of the detection drive wheel 7 so that the sealing ring switches between two sets of annular grooves 702.

[0077] The traction structure includes a first electric telescopic rod 10 fixedly installed on the tensioning structure and a connecting shaft 11 detachably connected to the actuating end of the first electric telescopic rod 10. A traction member 12 is provided at the end of the connecting shaft 11 away from the first electric telescopic rod 10. Specifically, the traction member 12 is rotatably connected to the connecting shaft 11, and a convex shaft 1201 that can slide in the guide groove is rotatably installed on the traction member 12.

[0078] The pulling member 12 is connected to a limiting shaft 13, which is slidably connected to a connecting sleeve 14 disposed on the base 15. The cross-section of the limiting shaft 13 is non-circular, which prevents the pulling member 12 from rotating under the cooperation of the limiting shaft 13 and the connecting sleeve 14, and prevents unnecessary friction between it and the ejector member 16.

[0079] In the initial state, the convex shaft 1201 is located at the end of the vertical groove 1604 away from the inclined groove 1603. Since the vertical groove 1604 is perpendicular to the movement direction of the ejector 16, the ejector 16 is locked in this state. At the same time, the ejector 16 is inside the detection drive wheel 7, which avoids the ejector 16 from protruding from the detection drive wheel 7 due to the driving error of the first electric telescopic rod 10, causing the sealing ring to be unable to enter the lower annular groove 702.

[0080] When the position of the sealing ring needs to be changed, the first electric telescopic rod 10 is controlled to pull the connecting shaft 11. At this time, the pulling member 12 will move away from the base 15 and cause the convex shaft 1201 to move along the vertical groove 1604 and the inclined groove 1603 in sequence. During this process, the ejector 16 will move towards the outside of the detection drive wheel 7 and use the inclined surface 1601 to drive the sealing ring towards the upper annular groove 702, so that the sealing ring can be rotated at a certain angle as a whole, so that the vision inspection module can perform a more comprehensive inspection of the sealing ring.

[0081] Based on the above settings, after the vision inspection module completes the inspection of the upper and lower sides of the sealing ring, the ejector 16 ejects and allows the sealing ring to switch from the lower annular groove 702 to the upper annular groove 702. This allows the sealing ring to be rotated at a certain angle as a whole, so that the area originally on the side of the sealing ring can be switched to the area facing the vision inspection module. This ensures that the vision inspection module can perform a more comprehensive inspection of the sealing ring, guaranteeing the completeness and accuracy of the inspection.

[0082] Please see Figure 4 , Figures 9-10 Furthermore, during the process of the sealing ring being transferred from the placement plate 37 to the constraint member 32, when the size of the sealing ring is large, its torsional strength will decrease. This causes the end of the sealing ring away from the ejector pin 36 to twist due to friction with the placement plate 37 and the constraint member 32 when the ejector pin 36 drives the sealing ring to move. This twisting phenomenon will persist after the sealing ring is transferred to the detection drive wheel 7 and will affect the detection accuracy of the vision detection module. Therefore, the optical detection device for the sealing ring based on the rotation of the inner support also includes: a drive assembly, a first clamping roller 24 and a second clamping roller 25. It is worth noting that the side of the sealing ring that abuts against the ejector pin 36 will be subjected to two frictional forces, including friction with the placement plate 37 and the constraint member 32 and friction with the ejector pin 36. These two frictional forces can counterbalance each other, resulting in a lower degree of twisting on the side of the sealing ring that abuts against the ejector pin 36.

[0083] The drive assembly is connected to the tensioning structure, and the drive assembly is provided with a connecting plate 23, which can move along the tensioned sealing ring.

[0084] The drive assembly includes a bracket 17 connected to the tensioning structure and a first linear drive module 18 mounted on the bracket 17. The first linear drive module 18 is provided with a sliding member 19, and a guide shaft 1901 is mounted on the sliding member 19. Specifically, one end of the bracket 17 is fixedly connected to the first drive arm 5, and the other end is slidably connected to the second drive arm 6.

[0085] The drive assembly also includes a telescopic arm assembly disposed on the sliding member 19, the telescopic arm assembly being slidably connected to the guide shaft 1901, and the telescopic arm assembly being connected to a third electric telescopic rod 2201 disposed on the sliding member 19.

[0086] The telescopic arm assembly includes a connecting arm 20 that is slidably connected to the guide shaft 1901 and fixedly connected to the third electric telescopic rod 2201. A telescopic arm 21 is slidably mounted on the connecting arm 20. The telescopic arm 21 is connected to the connecting plate 23, and the telescopic arm 21 is connected to the second electric telescopic rod 22 mounted on the connecting arm 20.

[0087] In this embodiment, the connecting plate 23 has three motion states. One is that the connecting plate 23 can follow the first linear drive module 18 to make linear motion. At this time, after the first clamping roller 24 and the second clamping roller 25 clamp the sealing ring, the first clamping roller 24 and the second clamping roller 25 can be driven to move along the length direction of the sealing ring.

[0088] Secondly, the second electric telescopic rod 22 drives the telescopic arm 21 to move relative to the connecting arm 20, so that the distance between the connecting plate 23 and the first linear drive module 18 can be adjusted, so that when the sealing ring is transferred from the constraint member 32 to the detection drive wheel 7, the first clamping roller 24 and the second clamping roller 25 will not interfere with the constraint member 32, and can make timely clearance after the sealing ring is released from the torsion state, preventing the connecting plate 23 from blocking the sealing ring and causing the detection area of ​​the vision detection module to decrease;

[0089] Thirdly, the third electric telescopic rod 2201 can drive the connecting plate 23 to perform lifting and lowering actions, so that the height of the first clamping roller 24 and the second clamping roller 25 can be changed. When the first clamping roller 24 and the second clamping roller 25 move to a certain position directly above the sealing ring, they can descend, thereby clamping the sealing ring when the first clamping roller 24 and the second clamping roller 25 move closer to each other. In addition, when the sealing ring is released from the twisted state, the connecting plate 23 first performs an upward action and then moves toward the first linear drive module 18, which can avoid the situation where the first clamping roller 24 and the second clamping roller 25 interfere with the sealing ring and pull the sealing ring when they move.

[0090] Please see Figures 11-12The first clamping roller 24 is rotatably mounted on the connecting plate 23, and the second clamping roller 25 is connected to the bidirectional drive structure provided on the connecting plate 23. Damping washers 28 are provided on the rotating shafts of the first clamping roller 24 and the second clamping roller 25.

[0091] Two sets of sliding grooves 2301 are symmetrically arranged on the connecting plate 23. A slider 27 is slidably installed in the sliding groove 2301. The slider 27 is rotatably connected to the second clamping roller 25.

[0092] The bidirectional drive structure includes a drive device 26 fixedly installed on the connecting plate 23. A turntable 29 is connected to the output shaft of the drive device 26. Two sets of fitting shafts 2901 are symmetrically installed on the turntable 29. The fitting shafts 2901 are slidably connected to the fitting grooves 2701 provided on the slider 27.

[0093] In this embodiment, when the sealing ring is transferred to the detection drive wheel 7, the connecting plate 23 will move to a certain position. At this time, the first clamping roller 24 and the second clamping roller 25 will move to both sides of the sealing ring respectively. At this time, the drive device 26 will rotate, causing the turntable 29 and the fitting shaft 2901 to move. The fitting shaft 2901 is in the fitting groove 2701, so that when the fitting shaft 2901 moves, it can drive the two sets of sliders 27 to move away from each other and cause the second clamping roller 25 to move towards the first clamping roller 24 until the two clamp the sealing ring. Then, the first linear drive module 18 will drive the connecting plate 23 to move along the length direction of the sealing ring. The first clamping roller 24 and the second clamping roller 25 are both provided with damping washers 28, so that when the first clamping roller 24 and the second clamping roller 25 move, This mechanism can exert a squeezing and pulling effect on the sealing ring. Specifically, the side of the sealing ring away from the direction of movement of the connecting plate 23 will be stretched, while the other side will be released. That is, the side of the sealing ring that is twisted will be released, reducing the contact pressure between it and the detection drive wheel 7. At the same time, the friction between the two will decrease, allowing the sealing ring to recover from the above-mentioned twisted state under its own elasticity, thereby reducing the degree of twist of the sealing ring. Furthermore, as the first clamping roller 24 and the second clamping roller 25 move, the above-mentioned twist tends to be driven towards one end of the sealing ring. This allows the sealing ring to reduce the above-mentioned twist to the greatest extent possible by relying on its own elastic force when the first clamping roller 24 and the second clamping roller 25 move to the end of the stroke. This results in a lower degree of twist during subsequent detection, thereby improving the detection accuracy to a certain extent.

[0094] It should be noted that although damping washers 28 are provided on the rotating shafts of the first clamping roller 24 and the second clamping roller 25, allowing one end of the sealing ring to be stretched and the other end to be released, when one end of the sealing ring is stretched and the other end is released to a certain extent, the rotational force on the first clamping roller 24 and the second clamping roller 25 is greater than the resistance provided by the damping washers 28. That is, the cooperation of the first clamping roller 24 and the second clamping roller 25 will not cause the force on the sealing ring to increase continuously. This can prevent the sealing ring from being torn apart and also prevent the sealing ring from being excessively released, causing the released end to separate from the detection drive wheel 7.

[0095] Based on the above configuration, when the sealing ring is transferred to the detection drive wheel 7 and twists, the first clamping roller 24 and the second clamping roller 25 can cooperate to stretch one side of the sealing ring and release the other side, reducing the contact force and friction between the twisted side of the sealing ring and the detection drive wheel 7. The elastic force of the sealing ring itself is used to weaken the degree of twist, ensuring that the detection accuracy will not decrease due to the large degree of twist of the sealing ring when it rotates with the detection drive wheel 7.

[0096] As an embodiment of the present invention, a method for detecting a sealing ring using the aforementioned optical inspection device for sealing rings based on internal support rotation is also proposed, comprising the following steps:

[0097] Step 1: The tensioning structure moves the two sets of detection drive wheels 7 away from each other to grab the sealing ring to be tested;

[0098] Step 2: The stepper rotating frame rotates to switch the position of the gripped sealing ring, placing it between the two sets of vision inspection modules;

[0099] Step 3: The drive assembly drives the connecting plate 23 to move, so that the two sets of first clamping rollers 24 are located on both sides of the sealing ring to be tested. Then, the bidirectional drive structure drives the second clamping roller 25 to move toward the first clamping roller 24 and clamp the sealing ring to be tested.

[0100] Step 4: The drive assembly drives the connecting plate 23 to move along the length of the sealing ring to be tested, so that one side of the sealing ring tightens and the other side of the sealing ring is released;

[0101] Step 5: Detect the rotation of drive wheel 7, which drives the sealing ring to rotate, and perform the detection action;

[0102] Step Six: The pulling structure cooperates with the guide groove to drive the sealing ring to be tested from the lower annular groove 702 to the upper annular groove 702, and the testing action is performed again.

[0103] 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.

[0104] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An optical inspection device for sealing rings based on internal support rotation, comprising: A stepping rotary frame is provided with multiple sets of tensioning structures. Each set of tensioning structures is connected to two sets of detection drive wheels. The detection drive wheels have a recessed portion in the middle, and one set of detection drive wheels can rotate. The vision inspection module is provided in two sets, which are arranged opposite to each other, and are used to inspect the sealing ring that is tensioned by the detection drive wheel; Its characteristic is that it further includes: Two sets of annular grooves are provided and located within the recessed portion; Multiple sets of through holes are provided along the circumferential direction of the annular groove located at the lower part; The base is detachably connected to the lower end of the detection drive wheel. Multiple sets of ejector parts that can pass through the through hole are slidably installed on the base in a circumferential manner. The ejector parts are provided with guide grooves. A traction structure connects to the base and passes through the shaft of the detection drive wheel. The traction structure cooperates with the guide groove and can drive multiple sets of ejector parts to move toward the outside of the detection drive wheel so that the sealing ring switches between two sets of annular grooves. One end of the ejector is provided with an inclined surface, and the bottom of the ejector is provided with a sliding connection part, which is slidably connected to the guide part provided on the base. The guide groove includes an inclined groove and a vertical groove provided on the ejector. When the pulling structure moves along the inclined groove, the ejector can move towards the outside of the detection drive wheel along the length direction of the guide portion. The traction structure includes a first electric telescopic rod fixedly installed on the tensioning structure and a connecting shaft detachably connected to the actuating end of the first electric telescopic rod. A traction member is provided at the end of the connecting shaft away from the first electric telescopic rod, and a convex shaft that can slide in the guide groove is rotatably installed on the traction member. The pulling member is connected to a limiting shaft, and the limiting shaft is slidably connected to a connecting sleeve disposed on the base.

2. The optical inspection device for sealing rings based on internal support rotation according to claim 1, characterized in that, The stepping rotary frame includes a support plate and a stepping motor connected to the support plate, the stepping motor being able to drive the support plate to rotate step by step; The tensioning structure is installed on the support plate and includes a slide rail fixedly installed on the support plate. A first drive arm and a second drive arm are provided on the slide rail. The ends of the first drive arm and the second drive arm away from the slide rail are rotatably connected to the detection drive wheel. A cylinder is fixedly installed on the support plate, and the actuating end of the cylinder is connected to the second drive arm.

3. The optical inspection device for sealing rings based on internal support rotation according to claim 2, characterized in that, A first drive motor is fixedly mounted on the second drive arm, and the output shaft of the first drive motor is connected to the shaft of the detection drive wheel via a toothed belt.

4. The optical inspection device for sealing rings based on internal support rotation according to claim 1, characterized in that, Also includes: A drive assembly is connected to the tensioning structure, and a connecting plate is provided on the drive assembly, which can move along the tensioned sealing ring; A first clamping roller and a second clamping roller are provided. The first clamping roller is rotatably mounted on the connecting plate, and the second clamping roller is connected to a bidirectional drive structure provided on the connecting plate. Damping washers are provided on the rotating shafts of both the first clamping roller and the second clamping roller.

5. The optical inspection device for sealing rings based on internal support rotation according to claim 4, characterized in that, The drive assembly includes a bracket connected to the tensioning structure and a first linear drive module mounted on the bracket. The first linear drive module is provided with a sliding member, and a guide shaft is mounted on the sliding member. The drive assembly further includes a telescopic arm assembly disposed on the sliding member, the telescopic arm assembly being slidably connected to the guide shaft, and the telescopic arm assembly being connected to a third electric telescopic rod disposed on the sliding member.

6. The optical inspection device for sealing rings based on internal support rotation according to claim 5, characterized in that, The telescopic arm assembly includes a connecting arm that is slidably connected to the guide shaft and fixedly connected to the third electric telescopic rod. A telescopic arm is slidably mounted on the connecting arm. The telescopic arm is connected to the connecting plate, and the telescopic arm is connected to the second electric telescopic rod mounted on the connecting arm.

7. The optical inspection device for sealing rings based on internal support rotation according to claim 5, characterized in that, Two sets of sliding grooves are symmetrically arranged on the connecting plate, and a slider is slidably installed in the sliding groove. The slider is rotatably connected to the second clamping roller. The bidirectional drive structure includes a drive device fixedly mounted on the connecting plate. A turntable is connected to the output shaft of the drive device. Two sets of fitting shafts are symmetrically mounted on the turntable. The fitting shafts are slidably connected to the fitting grooves provided on the slider.

8. A method for inspecting a sealing ring using an optical inspection device for sealing rings based on internal support rotation as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: The tensioning structure moves the two sets of detection drive wheels away from each other to grip the sealing ring to be tested; Step 2: The stepper rotating frame rotates to switch the position of the gripped sealing ring, placing it between the two sets of vision inspection modules; Step 3: The drive assembly drives the connecting plate to move, so that the two sets of first clamping rollers are located on both sides of the sealing ring to be tested. Then, the bidirectional drive structure drives the second clamping roller to move toward the first clamping roller and clamp the sealing ring to be tested. Step 4: The drive assembly drives the connecting plate to move along the length of the sealing ring to be tested, so that one side of the sealing ring tightens and the other side of the sealing ring releases. Step 5: Detect the rotation of the drive wheel, which drives the sealing ring to rotate, and perform the detection action; Step Six: The pulling structure cooperates with the guide groove to drive the sealing ring to be tested from the lower annular groove to the upper annular groove, and the testing action is performed again.

Images