Visual inspection equipment and VDA joint visual inspection method

Abstract

The present invention belongs to the technical field of visual inspection equipment, and specifically relates to a visual inspection device and a VDA joint visual inspection method, comprising a detection box and a feeding mechanism; a fixing mechanism, the fixing mechanism being installed on the feeding mechanism in an array distribution, and being used to fix the joint to be inspected; a detection mechanism, the detection mechanism being arranged in a detection cavity on the detection box, and being used to inspect both ends of the joint; an auxiliary mechanism, the auxiliary mechanism being arranged on the detection box; a dust collection mechanism, the dust collection mechanism being arranged on the detection box, and being used to collect dust; wherein the auxiliary mechanism comprises an air supply portion, the air supply portion being arranged on the back of the detection box, a dust removal portion being arranged in the detection cavity on the detection box, and a first control portion and a second control portion being installed on the top surface of the detection box. The present invention overcomes the shortcomings of traditional joint detection methods by improving detection efficiency and accuracy, adding dust removal measures, and simplifying the classification process.

Description

Technical Field

[0001] The present invention belongs to the technical field of visual inspection equipment, and in particular relates to a visual inspection equipment and a VDA joint visual inspection method. Background Art

[0002] In modern industrial production, quality inspection of precision components such as joints is crucial for ensuring product performance and reliability. Traditional joint inspection methods often rely on manual visual inspection or simple mechanical measurement tools. These methods are not only inefficient and costly, but are also susceptible to human factors, resulting in inaccurate and unreliable inspection results.

[0003] To improve inspection effectiveness and efficiency, automated visual inspection equipment is generally used. For example, Chinese patent CN109499916B provides a visual inspection method for pipe joints. This method uses a conveyor line to effectively realize automated pipe joint transportation. During the transportation process, the endoscope inspection mechanism, the outer surface inspection mechanism, and the three-camera inspection mechanism are arranged in sequence to realize their respective inspection functions. After the pipe joints are distinguished as qualified, defective, or waste, they can be sorted and collected. The overall mechanical automation is realized, and only one person is required to monitor and control the device, which effectively saves manpower, improves quality inspection efficiency and quality, and is conducive to improving product quality and ensuring economic benefits.

[0004] Although the above patents have achieved the purpose of automated detection, they still have some shortcomings during use:

[0005] First, there is a lack of effective dust removal measures. Dust and other tiny particles adhering to the workpiece to be inspected may interfere with the camera's image acquisition process, thereby affecting the accuracy of the inspection results.

[0006] Secondly, in terms of sorting and discharging defective and qualified products, additional sorting mechanisms are needed to complete this task, which requires a combination of multiple drive components, increasing production and maintenance costs. Summary of the Invention

[0007] The purpose of the present invention is to provide a visual inspection device and a VDA joint visual inspection method, which overcomes the shortcomings of traditional joint inspection methods by improving inspection efficiency and accuracy, adding dust removal measures and simplifying the classification process, and significantly improves the effect and economic benefits of joint inspection.

[0008] The technical solutions adopted by the present invention are as follows:

[0009] A visual inspection device comprises an inspection box, wherein an inspection cavity is formed at the upper end of the inspection box, and a feeding mechanism is installed in the inspection cavity;

[0010] A fixing mechanism, which is installed on the feeding mechanism in an array distribution and is used to fix the joint to be tested;

[0011] A detection mechanism, which is provided in a detection cavity on the detection box and is used to detect both ends of the connector;

[0012] An auxiliary mechanism, the auxiliary mechanism is provided on the detection box and is used to assist in detecting the joint;

[0013] A dust collecting mechanism is provided on the detection box and is used to collect dust;

[0014] The auxiliary mechanism includes an air supply unit, which is arranged on the back of the detection box. A dust removal unit is provided in the detection cavity of the detection box. The top surface of the detection box is equipped with a first control unit and a second control unit.

[0015] In a preferred embodiment, the detection box is provided with a first material discharge chute and a second material discharge chute, and a first blocking rod and a second blocking rod are respectively provided above the first material discharge chute and the second material discharge chute, wherein the first blocking rod is slidably connected to the detection cavity on the detection box, and the second blocking rod is fixedly connected to the detection cavity on the detection box.

[0016] In a preferred embodiment, the feeding mechanism includes a rotating rod, and the two rotating rods are rotatably connected to the detection cavity on the detection box through bearings. Two transmission gears are fixedly installed on the rotating rod, and toothed belts are installed on the corresponding transmission gears on the two rotating rods. A motor is fixedly installed on the back of the detection box, and the output shaft of the motor is fixedly connected to the central rotating shaft of one of the rotating rods.

[0017] In a preferred embodiment, the fixing mechanism includes a fixed seat, which is connected to the toothed belt, and the fixed seat is provided with two sliding grooves, and is slidably connected to a movable block in the sliding grooves, and the movable block is fixedly connected to the inner wall of the sliding groove by a tension spring, and the fixed seat is fixedly connected to a connecting rod, and the connecting rod is fixedly connected to a splint, and a part of the connecting rod is also fixedly connected to a swivel seat, and a force-bearing rod is rotatably connected to the swivel seat, and a torsion spring is fixedly connected between the rotating shaft of the force-bearing rod and the swivel seat.

[0018] In a preferred embodiment, the detection mechanism includes a protective shell and a camera, which are fixedly installed in the detection cavity on the detection box, and the camera end of the camera extends into the protective shell. The upper end of the protective shell is slidably plugged with a baffle, and the baffle is fixedly connected to a compression spring, and the compression spring is fixedly connected to the detection box.

[0019] In a preferred embodiment, the gas delivery unit includes an air pump, which is fixedly mounted on the back of the detection box. The exhaust end of the air pump is connected to an exhaust pipe, and one end of the exhaust pipe is connected to a first shunt pipe and a second shunt pipe.

[0020] In a preferred embodiment, the dust removal part includes a drainage pipe, both of the drainage pipes are connected to the first shunt pipe, and the other end of the drainage pipe extends to the detection cavity on the detection box, the lower end of the drainage pipe is connected to a jet hood, a high-voltage power supply generator is installed inside the jet hood, and discharge electrodes are connected in an array on the high-voltage power supply generator, wherein the inner wall of the first shunt pipe is fixedly connected to a sleeve block by a support rod, a moving rod is slidably connected to the center of the sleeve block, one end of the moving rod is fixedly connected to a sealing plate, and the other end is fixedly connected to a circular plate, a first spring is fixedly connected between the circular plate and the sleeve block, the inner wall of the first shunt pipe is also fixedly connected to a guide seat, the dust collecting mechanism includes a dust collecting trough, a dust collecting trough is provided on the detection box, a collection box is plugged into the upper end of the dust collecting trough, and a negative pressure fan is installed at the lower end of the dust collecting trough.

[0021] In a preferred embodiment, the first control unit includes a first gas cylinder, which is fixedly connected to the top surface of the detection box, and a first piston block is slidably connected inside the first gas cylinder. The lower end of the first gas cylinder is piston-type plugged with a first lifting rod, and one end of the first lifting rod is fixedly connected to the first piston block, and the other end is fixedly connected to the baffle, and the upper end of the first gas cylinder is connected to an air supply pipe, and the air supply pipe is connected to the second diversion pipe.

[0022] In a preferred embodiment, the second control part includes a second air cylinder, which is connected to the end of the second diversion pipe, and the upper end of the second air cylinder is piston-connected with a second lifting rod, the lower end of the second lifting rod is fixedly connected with a second piston block, and a second spring is fixedly connected between the second piston block and the inner wall of the second air cylinder, the upper end of the second lifting rod is fixedly connected with a lifting plate, the bottom surface of the lifting plate is fixedly connected with a pull rod, and the lower end of the pull rod passes through the upper end of the detection box and is fixedly connected to the first blocking rod.

[0023] A VDA joint visual inspection method, applied to the above-mentioned visual inspection equipment, comprises the following steps:

[0024] Step 1: Install the joint to be tested on the fixing mechanism, and start the feeding mechanism to drive the joint on the fixing mechanism to move;

[0025] Step 2: When the joint moves to the detection mechanism, the joint is visually inspected by the detection mechanism;

[0026] Step 3: When the connector is moving, start the air transmission part, and remove the dust adhering to both ends of the connector through the dust removal part, and then collect the cleaned dust through the dust collection mechanism;

[0027] Step 4: After the gas transmission unit is started, the first control unit operates synchronously with the gas transmission unit and protects the detection mechanism;

[0028] Step 5: When an unqualified joint is detected, the second control unit operates to drive the first blocking rod to move upward. At this time, the unqualified joint is blocked by the first blocking rod and falls, and is discharged along the first chute, while the qualified joint is blocked by the second blocking rod and falls, and is discharged along the second chute.

[0029] The technical effects achieved by the present invention are:

[0030] This invention uses a camera and image analysis system to perform detailed visual inspections of both ends of the connector. Prior to inspection, the dust removal unit cleans the object being inspected, effectively eliminating the interference of dust and other small particles on the test results, significantly improving the accuracy and reliability of the inspection. Furthermore, the design of the protective housing and the automatic lift function of the baffle further ensure the cleanliness of the camera lens, thereby guaranteeing the quality of image acquisition.

[0031] In traditional methods, the classification and discharge of defective and qualified products usually requires additional sorting mechanisms to complete this task, which increases production and maintenance costs. However, the present invention realizes the automated sorting of joints through an auxiliary mechanism and two blocking bars. When an unqualified joint is detected, the second control unit will operate to drive the first blocking bar upward, causing the unqualified joint to fall into the first chute; while for qualified joints, they will naturally fall into the second chute when passing the second blocking bar. This design avoids the use of additional sorting mechanisms, simplifies the structure, reduces production costs, and improves overall work efficiency;

[0032] This invention not only focuses on improving detection accuracy and achieving automated classification, but also incorporates comprehensive optimization from multiple perspectives to enhance economic efficiency. For example, the design of the dust collection mechanism not only effectively collects cleaned dust, reducing environmental pollution, but also reduces equipment failures caused by dust, extending equipment life. Furthermore, the entire system connects to external devices (such as computers), enabling precise software control of the operating status of each component, enabling intelligent management, reducing the need for manual monitoring, and saving human resource costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0034] Figure 2 This is a schematic diagram of the structure of the detection box of the present invention after the top protective cover is removed;

[0035] Figure 3 This invention Figure 2 rear side view;

[0036] Figure 4 It is a shallow cross-sectional view of the detection box of the present invention;

[0037] Figure 5 This invention Figure 4 Front view of

[0038] Figure 6 is a deep cross-sectional view of the detection box of the present invention;

[0039] Figure 7 Schematic diagram of the internal structure of the jet hood of the present invention;

[0040] Figure 8 Schematic diagram of the internal structure of the first shunt pipe of the present invention;

[0041] Figure 9 It is a schematic structural diagram of the first control unit and the second control unit of the present invention;

[0042] Figure 10 This invention Figure 9 An enlarged schematic diagram of part B shown in ;

[0043] Figure 11 This invention Figure 9 An enlarged schematic diagram of part C is shown in FIG;

[0044] Figure 12 This invention Figure 9 An enlarged schematic diagram of portion D shown in FIG;

[0045] Figure 13 This invention Figure 4 An enlarged schematic diagram of part A shown in FIG;

[0046] Figure 14 It is a schematic diagram of the connection between the swivel seat and the stress-bearing rod of the present invention;

[0047] Figure 15 It is a schematic diagram of the connection between the fixed seat and the movable block of the present invention.

[0048] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0049] 1. Detection box; 11. First material discharge chute; 111. First blocking rod; 12. Second material discharge chute; 121. Second blocking rod; 2. Feeding mechanism; 3. Fixing mechanism; 4. Detection mechanism; 5. Auxiliary mechanism; 6. Dust collection mechanism;

[0050] 21. Rotating rod; 22. Transmission gear; 23. Toothed belt; 24. Motor;

[0051] 31. Fixed seat; 32. Movable block; 33. Tension spring; 34. Connecting rod; 35. Clamp; 36. Rotating seat; 37. Force rod; 38. Torsion spring;

[0052] 41. Protective housing; 42. Camera; 43. Baffle; 44. Compression spring;

[0053] 61. Dust collecting trough; 62. Collection box; 63. Negative pressure fan;

[0054] 51. Gas transmission unit; 52. Dust removal unit; 53. First control unit; 54. Second control unit;

[0055] 511, air pump; 512, exhaust pipe; 513, first shunt pipe; 514, second shunt pipe;

[0056] 521, drainage tube; 522, jet cover; 523, high-voltage power generator; 524, discharge electrode; 5211, sleeve block; 5212, moving rod; 5213, guide seat; 5214, blocking plate; 5215, circular plate; 5216, first spring;

[0057] 531, first air cylinder; 532, first lifting rod; 533, first piston block; 534, air pipe;

[0058] 541. Second air cylinder; 542. Second lifting rod; 543. Second piston block; 544. Second spring; 545. Lifting plate; 546. Pull rod; 547. Solenoid valve. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0060] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0061] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it constitute a separate or selective embodiment that is mutually exclusive of other embodiments.

[0062] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0063] Please see the attached Figures 1 to 5 As shown, this embodiment provides a visual inspection device, including an inspection box 1, an inspection cavity is opened at the upper end of the inspection box 1, and a feeding mechanism 2 is installed in the inspection cavity;

[0064] The fixing mechanism 3 is installed on the feeding mechanism 2 in an array distribution and is used to fix the joint to be tested;

[0065] Detection mechanism 4, which is provided in the detection cavity on the detection box 1 and is used to detect both ends of the joint;

[0066] Auxiliary mechanism 5, the auxiliary mechanism 5 is provided on the detection box 1 and is used to assist in detecting the joint;

[0067] A dust collecting mechanism 6 is provided on the detection box 1 and is used to collect dust;

[0068] The auxiliary mechanism 5 includes an air supply unit 51 , which is arranged on the back of the detection box 1 . A dust removal unit 52 is provided in the detection cavity of the detection box 1 . A first control unit 53 and a second control unit 54 are installed on the top surface of the detection box 1 .

[0069] In this embodiment, the detection box 1 is connected to an external device (a control device such as a computer).

[0070] Next, please refer to Figures 4 to 6 A first material discharge chute 11 and a second material discharge chute 12 are provided on the detection box 1, and a first blocking rod 111 and a second blocking rod 121 are respectively provided above the first material discharge chute 11 and the second material discharge chute 12, wherein the first blocking rod 111 is slidably connected to the detection cavity on the detection box 1, and the second blocking rod 121 is fixedly connected to the detection cavity on the detection box 1.

[0071] In this embodiment, qualified or unqualified joints are classified and discharged through two discharge chutes and two blocking bars.

[0072] Secondly, please refer to Figure 4The feeding mechanism 2 includes a rotating rod 21. The two rotating rods 21 are rotatably connected to the detection cavity on the detection box 1 through bearings. Two transmission gears 22 are fixedly installed on the rotating rod 21. The corresponding transmission gears 22 on the two rotating rods 21 are installed with toothed belts 23. A motor 24 is fixedly installed on the back of the detection box 1, and the output shaft of the motor 24 is fixedly connected to the central rotating shaft of one of the rotating rods 21.

[0073] In this embodiment, by activating the motor 24, one of the rotating rods 21 can be driven to begin rotating. Simultaneously, each of the two rotating rods 21 is equipped with a transmission gear 22, which is interconnected by a toothed belt 23. Therefore, when one rotating rod 21 begins to rotate, the toothed belt 23 moves accordingly, causing the other rotating rod 21 to rotate synchronously. This synchronous rotation mechanism ensures smooth and continuous movement of the toothed belt 23. The movement of the toothed belt 23 not only drives the movement of the fixing mechanism 3, but also causes the joints on the fixing mechanism 3 to move accordingly, thereby achieving coordinated operation of the entire system.

[0074] It should be noted that motor 24 operates intermittently. After a period of operation, it pauses to ensure a pause while the connector moves to the detection mechanism 4. During this pause, the system captures images of the probe and places a new probe for testing within the leftmost fixture 3 for the next round of testing. This intermittent operation and synchronization mechanism ensure the efficiency and accuracy of the entire testing process.

[0075] Next, please refer to Figures 13 to 15 The fixing mechanism 3 includes a fixed seat 31, which is connected to the toothed belt 23. Two sliding grooves are provided on the fixed seat 31, and a movable block 32 is slidably connected in the sliding groove, and the movable block 32 is fixedly connected to the inner wall of the sliding groove by a tension spring 33. A connecting rod 34 is fixedly connected to the fixed seat 31, and a splint 35 is fixedly connected to the connecting rod 34. A part of the connecting rod 34 is also fixedly connected to a rotating seat 36, and a force-bearing rod 37 is rotatably connected to the rotating seat 36, and a torsion spring 38 is fixedly connected between the rotating shaft of the force-bearing rod 37 and the rotating seat 36.

[0076] In this embodiment, during the joint inspection process, the joint to be inspected must first be placed on the fixing mechanism 3, either manually or using a robot. The moment the joint contacts the two clamps 35, the two clamps 35 begin to move away from each other. This movement away from each other further forces the connecting rod 34 and the movable block 32 to move away from each other, while simultaneously stretching the tension spring 33. Once the joint is embedded within the two clamps 35, the tension spring 33, due to its own restoring force, begins to work, pushing the two clamps 35 toward each other. Through this movement toward each other, the two clamps 35 are able to firmly clamp and secure the joint, preparing for subsequent inspection.

[0077] Furthermore, it's important to note that the connector is first secured to the leftmost fixture 3. In this detection system, the transmission gear 22 rotates counterclockwise. This design allows the transmission gear 22 to effectively move the connector on the fixture 3 from left to right during counterclockwise rotation.

[0078] Please refer again Figure 5 and Figure 10 The detection mechanism 4 includes a protective shell 41 and a camera 42. The protective shell 41 and the camera 42 are fixedly installed in the detection cavity on the detection box 1, and the camera end of the camera 42 extends into the protective shell 41. A baffle 43 is slidably inserted at the upper end of the protective shell 41, and a compression spring 44 is fixedly connected to the baffle 43, and the compression spring 44 is fixedly connected to the detection box 1.

[0079] In this embodiment, when the connector moves to the position where the camera 42 is located, the system in the external device will start an automatic detection process. During this process, the cameras 42 at both ends of the connector are used to collect image information from both ends of the connector. This image information will then be transmitted to the analysis system in the external device, and the system will use a pre-set standard template for comparative analysis. Through this comparative analysis, the system can accurately determine whether the connector has defects, thereby determining whether the connector meets the quality standards, that is, whether the connector is qualified. In order to ensure the normal operation of the camera 42 and extend its service life, it is equipped with a protective shell 41. The function of the protective shell 41 is to protect the camera end of the camera 42. In addition, in order to further ensure the accuracy and safety of the detection process, a lifting baffle 43 is also designed. The baffle 43 can automatically descend at the appropriate time to seal the port of the protective shell 41, which can effectively prevent the intrusion of external contaminants and ensure the cleanliness and stability of the entire detection environment, thereby improving the reliability of the detection results.

[0080] Please refer again Figure 3The air delivery unit 51 includes an air pump 511, which is fixedly mounted on the back of the detection box 1. The exhaust end of the air pump 511 is connected to an exhaust pipe 512, and one end of the exhaust pipe 512 is connected to a first shunt pipe 513 and a second shunt pipe 514.

[0081] Please refer again Figures 4 to 7 The dust removal part 52 includes a drainage pipe 521. The two drainage pipes 521 are both connected to the first diversion pipe 513, and the other end of the drainage pipe 521 extends to the detection cavity on the detection box 1. The lower end of the drainage pipe 521 is connected to the jet cover 522. A high-voltage power supply generator 523 is installed inside the jet cover 522. The high-voltage power supply generator 523 is connected to the discharge electrode 524 in an array. The dust collecting mechanism 6 includes a dust collecting trough 61. The detection box 1 is provided with a dust collecting trough 61. The upper end of the dust collecting trough 61 is plugged with a collection box 62, and the lower end of the dust collecting trough 61 is installed with a negative pressure fan 63.

[0082] In this embodiment, after the connector is secured and begins to move toward the detection mechanism 4, the air pump 511 is activated. As the air pump 511 is activated, gas begins to flow along the exhaust pipe 512 and enters the first and second diverter pipes 513 and 514, respectively. After entering the first diverter pipe 513, the gas continues along the drainage pipe 521, ultimately reaching the interior of the air hood 522. Inside the air hood 522, the gas is directed and blown out, with the force acting directly on both ends of the connector. Simultaneously, a high-voltage power generator 523 is installed within the air hood 522. This high-voltage power generator 523 is capable of releasing powerful high-voltage electrical energy. This high-voltage electrical energy ionizes the airflow passing through it via the discharge electrode 524, generating a large number of positive and negative ions. These ions, along with the airflow, are ultimately discharged through the air vents provided in the air hood 522. During this process, these ions are blown toward both ends of the connector, neutralizing static charges on both ends of the connector and in the air. In this way, static electricity can be effectively eliminated and dust adhesion can be avoided. The dust deposited at the end of the connector can be blown away by the action of the airflow, thereby keeping the connector clean and avoiding dust interfering with the image acquisition of the camera 42, resulting in a decrease in image quality and affecting subsequent image processing and analysis.

[0083] When the dust removal unit 52 begins operating, the negative pressure blower 63 is also activated. This activation creates a negative pressure inside the dust collection trough 61, which in turn generates suction at the through-hole at the top of the dust collection trough 61. This suction effectively draws dust into the dust collection trough 61, where it is then collected in the collection box 62.

[0084] It should be noted that the lower end of the dust collection trough 61 is provided with ventilation holes to allow air circulation. The collection box 62 is designed in a drawer-like shape and is pull-out and mounted on the detection box 1. A filter is also provided inside the storage tank of the collection box 62. The filter is designed to only allow air circulation and prevent dust from moving further downward, thereby collecting the dust in the collection box 62. After a period of use, the operator can pull the collection box 62 out of the dust collection trough 61 and clean the collected dust to ensure the continued efficient operation of the equipment.

[0085] Please refer again Figures 9 to 11 The first control unit 53 includes a first gas cylinder 531, which is fixedly connected to the top surface of the detection box 1. A first piston block 533 is slidably connected inside the first gas cylinder 531. A first lifting rod 532 is piston-type plugged into the lower end of the first gas cylinder 531, and one end of the first lifting rod 532 is fixedly connected to the first piston block 533, and the other end is fixedly connected to the baffle 43. The upper end of the first gas cylinder 531 is connected to an air supply pipe 534, and the air supply pipe 534 is connected to the second diversion pipe 514.

[0086] In this embodiment, after the gas enters the second diversion pipe 514, it will flow to the first gas cylinder 531 through the gas supply pipe 534. As the air pressure inside the first gas cylinder 531 gradually increases, the first piston block 533 will be squeezed and begin to move downward. The downward movement of the first piston block 533 will drive the first lifting rod 532 to move downward. The downward movement of the first lifting rod 532 will further prompt the baffle 43 to move downward along the protective shell 41, and at the same time compress the compression spring 44. The downward movement of the baffle 43 will effectively close the port of the protective shell 41. The purpose of doing this is to prevent dust flying around from adhering to the lens of the camera 42 during the dust removal process of the joint, thereby avoiding contamination of the lens of the camera 42. Maintaining the cleanliness of the lens is crucial to ensuring the accuracy of image acquisition. When the joint moves to the position of the detection mechanism 4, the motor 24, the air pump 511 and the negative pressure blower 63 will stop working immediately. The air pressure in the first air cylinder 531 then immediately decreases, and the return force of the compression spring 44 pushes the baffle 43 downward. The upward movement of the baffle 43 further forces the first lifting rod 532 and the first piston block 533 back to their initial positions. At this point, the port of the protective housing 41 reopens, and the camera 42 can begin capturing images.

[0087] Please refer again Figure 9 and Figure 11The second control unit 54 includes a second air cylinder 541, which is connected to the end of the second diversion pipe 514. The upper end of the second air cylinder 541 is piston-type plugged with a second lifting rod 542, and the lower end of the second lifting rod 542 is fixedly connected to a second piston block 543. A second spring 544 is fixedly connected between the second piston block 543 and the inner wall of the second air cylinder 541. The upper end of the second lifting rod 542 is fixedly connected to a lifting plate 545, and the bottom surface of the lifting plate 545 is fixedly connected to a pull rod 546, and the lower end of the pull rod 546 passes through the upper end of the detection box 1 and is fixedly connected to the first blocking rod 111.

[0088] In this embodiment, after the detection procedure is completed, the motor 24 will be started immediately, so that the joint continues to move to the right. At the same time, the air pump 511 and the negative pressure blower 63 are started to ensure the smooth progress of subsequent operations. When the detection system identifies that there is a quality problem with the joint, the solenoid valve 547 will be activated immediately. Once the solenoid valve 547 is opened, the gas will flow along the second diversion pipe 514 to the second gas cylinder 541. As the air pressure inside the second gas cylinder 541 gradually increases, the second piston block 543 will be under pressure and move upward. The rise of the second piston block 543 will drive the second lifting rod 542 and the lifting plate 545 to move upward together. As the lifting plate 545 rises, the pull rod 546 and the first blocking rod 111 will also move upward. When the fixing mechanism 3 moves to the position of the first blocking rod 111, the force rod 37 will be blocked by the first blocking rod 111 and cannot continue to move to the right. At this point, the connecting rod 34, clamping plate 35, and movable block 32 on the left side of the fixing mechanism 3 will also stop moving rightward and will stretch the tension spring 33. At the same time, the clamping plate 35 on the right side of the fixing mechanism 3 continues to move rightward, causing the two clamping plates 35 to move away from each other, thereby losing their fixing effect on the joint, causing the joint to eventually fall into the first discharge chute 11 and be discharged along the first discharge chute 11. After blocking the force-bearing rod 37 for a period of time, the movable block 32 will move along the fixed seat 31 to its maximum stroke. At this point, the movable block 32 will no longer be able to move and will no longer stretch the tension spring 33. At this time, the force-bearing rod 37 will be subjected to a large force and rotate along the rotating seat 36, twisting the torsion spring 38. After the force-bearing rod 37 rotates to a certain extent, it will pass through the first blocking rod 111. After passing through the first blocking rod 111, the force-bearing rod 37 and clamping plate 35 will return to their original position due to the influence of the torsion spring 38 and the tension spring 33. If the connector is detected as qualified, solenoid valve 547 will remain closed, no gas will enter second gas cylinder 541, and first blocking rod 111 will not rise. In this case, force-bearing rod 37 on fixing mechanism 3 will not contact first blocking rod 111. Similarly, when a qualified connector follows fixing mechanism 3 past first blocking rod 111 and moves to the position of second blocking rod 121, the two clamping plates 35 will move away from each other under the influence of second blocking rod 121, causing the connector to fall into second discharge chute 12 and be discharged along the second discharge chute 12. This mechanism effectively separates qualified and unqualified products, avoiding the need for additional sorting mechanisms to perform sorting work.

[0089] When the next joint to be tested moves to the position of the detection mechanism 4, the motor 24, the air pump 511 and the negative pressure blower 63 will stop working. After the air pump 511 stops working, the air pressure in the second air cylinder 541 will drop rapidly. Subsequently, the solenoid valve 547 will be closed, and under the reset force of the second spring 544, the second piston block 543, the second lifting rod 542, the pull rod 546 and the first blocking rod 111 will be pushed to reset. Until the next time an unqualified joint is detected, the solenoid valve 547 will open as the air pump 511 is restarted, thereby driving the first blocking rod 111 to move upward, preparing for the next round of detection and separation operations.

[0090] Please refer again Figure 8 The inner wall of the first diversion pipe 513 is fixedly connected to the sleeve block 5211 by a support rod, and a moving rod 5212 is slidably connected to the center of the sleeve block 5211. One end of the moving rod 5212 is fixedly connected to a blocking plate 5214, and the other end is fixedly connected to a circular plate 5215. A first spring 5216 is fixedly connected between the circular plate 5215 and the sleeve block 5211. The inner wall of the first diversion pipe 513 is also fixedly connected to the guide seat 5213.

[0091] In this embodiment, in order to ensure that the air pressure in the second diverter pipe 514 is sufficient and the first control unit 53 and the second control unit 54 can respond quickly, a blocking structure is provided at the air inlet end of the first diverter pipe 513, so that the gas can first enter the second diverter pipe 514, thereby prompting the first control unit 53 and the second control unit 54 to respond quickly. When the air pressure in the first diverter pipe 513 reaches a certain level, it will push the blocking plate 5214 to move to the side away from the guide seat 5213. The movement of the blocking plate 5214 drives the moving rod 5212 and the circular plate 5215 to move, and compresses the first spring 5216. At this time, the gas can flow through the gap between the guide seat 5213 and the blocking plate 5214, and then flow into the subsequent path.

[0092] Inspection box 1 is connected to an external device (such as a computer or other control device). This external device analyzes the captured image to inspect the joint. The external device also controls the operating states of motor 24, camera 42, negative pressure blower 63, air pump 511, and solenoid valve 547. This is well-known technology, readily understood by those skilled in the art, and will not be elaborated upon here.

[0093] In addition, the motor 24, camera 42, negative pressure fan 63, air pump 511 and high-voltage power supply generator 523 are all products currently available on the market. When selecting, one should try to choose one that meets the requirements of this application, provided that the specifications and usage scenarios are suitable. The specific model specifications are not limited here.

[0094] A VDA joint visual inspection method, applied to the above-mentioned visual inspection equipment, comprises the following steps:

[0095] Step 1: Install the joint to be tested on the fixing mechanism 3, and start the feeding mechanism 2 to drive the joint on the fixing mechanism 3 to move;

[0096] Step 2: When the joint moves to the detection mechanism 4, the joint is visually inspected by the detection mechanism 4;

[0097] Step 3: When the connector is moving, the air delivery unit 51 is started, and the dust adhering to both ends of the connector is removed by the dust removal unit 52, and the cleaned dust is then collected by the dust collection mechanism 6;

[0098] Step 4: After the gas delivery unit 51 is started, the first control unit 53 operates synchronously with the gas delivery unit 51 and protects the detection mechanism 4;

[0099] Step 5: When an unqualified joint is detected, the second control unit 54 operates to drive the first blocking rod 111 to move upward. At this time, the unqualified joint falls due to the obstruction of the first blocking rod 111 and is discharged along the first discharge chute 11, while the qualified joint falls due to the obstruction of the second blocking rod 121 and is discharged along the second discharge chute 12.

[0100] The working principle of the present invention is:

[0101] Feeding and Fixing: Motor 24 drives feeding mechanism 2 (comprising rotating rod 21, transmission gear 22, and toothed belt 23) in intermittent operation, ensuring that the joints are moved to the inspection position in an orderly manner. Fixing mechanism 3 securely holds the joint to be inspected using structures such as clamping plate 35 and tension spring 33.

[0102] Inspection process: When the joint is delivered to the inspection mechanism 4, the system initiates an automatic inspection process. Camera 42 captures images of both ends of the joint and transmits this information to an external control device (such as a computer). Using a pre-set standard template, the device compares and analyzes the information to determine if the joint is acceptable.

[0103] Dust removal: To ensure detection accuracy, the air delivery unit 51 in the auxiliary mechanism 5 is used to blow air to the joint to remove dust before detection, and the dust is collected by the dust collection mechanism 6. This step helps prevent dust from interfering with the quality of image acquisition.

[0104] Classification discharge: According to the test results, the equipment controls the discharge path of the joint through the first blocking rod 111 or the second blocking rod 121, and discharges qualified and unqualified products through different discharge troughs (first discharge trough 11 or second discharge trough 12).

[0105] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A visual inspection device, characterized in that: It comprises a detection box (1), wherein the upper end of the detection box (1) is provided with a detection cavity, and a feeding mechanism (2) is installed in the detection cavity; A fixing mechanism (3), the fixing mechanism (3) being installed on the feeding mechanism (2) in an array distribution, and being used to fix the joint to be tested; A detection mechanism (4), the detection mechanism (4) being arranged in a detection cavity on the detection box (1) and being used to detect both ends of the joint; An auxiliary mechanism (5), the auxiliary mechanism (5) being arranged on the detection box (1) and used for assisting in detecting the joint; A dust collecting mechanism (6), the dust collecting mechanism (6) being arranged on the detection box (1) and being used for collecting dust; The auxiliary mechanism (5) comprises an air delivery portion (51), the air delivery portion (51) being arranged on the back of the detection box (1), a dust removal portion (52) being arranged in the detection cavity of the detection box (1), and a first control portion (53) and a second control portion (54) being installed on the top surface of the detection box (1); The gas delivery unit (51) comprises an air pump (511), the air pump (511) being fixedly mounted on the back of the detection box (1), the exhaust end of the air pump (511) being connected to an exhaust pipe (512), and one end of the exhaust pipe (512) being connected to a first shunt pipe (513) and a second shunt pipe (514); The dust removal part (52) includes a drainage pipe (521), the two drainage pipes (521) are both connected to the first shunt pipe (513), and the other end of the drainage pipe (521) extends to the detection cavity on the detection box (1), the lower end of the drainage pipe (521) is connected to the jet cover (522), the interior of the jet cover (522) is equipped with a high-voltage power supply generator (523), and the high-voltage power supply generator (523) is connected to the discharge electrode (524) in an array distribution, wherein the inner wall of the first shunt pipe (513) is fixedly connected to the sleeve block (5211) by a support rod, and the center of the sleeve block (5211) is slidable. The movable rod (5212) is movably connected, one end of the movable rod (5212) is fixedly connected to a blocking plate (5214), and the other end is fixedly connected to a circular plate (5215), a first spring (5216) is fixedly connected between the circular plate (5215) and the sleeve (5211), the inner wall of the first shunt pipe (513) is also fixedly connected to a guide seat (5213), the dust collecting mechanism (6) includes a dust collecting trough (61), a dust collecting trough (61) is provided on the detection box (1), a collection box (62) is plugged into the upper end of the dust collecting trough (61), and a negative pressure fan (63) is installed at the lower end of the dust collecting trough (61); The first control unit (53) includes a first gas cylinder (531), the first gas cylinder (531) is fixedly connected to the top surface of the detection box (1), a first piston block (533) is slidably connected in the first gas cylinder (531), a first lifting rod (532) is piston-plugged at the lower end of the first gas cylinder (531), and one end of the first lifting rod (532) is fixedly connected to the first piston block (533), an upper end of the first gas cylinder (531) is connected to an air supply pipe (534), and the air supply pipe (534) is communicated with the second diversion pipe (514); The second control unit (54) includes a second air cylinder (541), the second air cylinder (541) is connected to the end of the second shunt pipe (514), the upper end of the second air cylinder (541) is piston-connected with a second lifting rod (542), the lower end of the second lifting rod (542) is fixedly connected with a second piston block (543), a second spring (544) is fixedly connected between the second piston block (543) and the inner wall of the second air cylinder (541), the upper end of the second lifting rod (542) is fixedly connected with a lifting plate (545), the bottom surface of the lifting plate (545) is fixedly connected with a pull rod (546), and the lower end of the pull rod (546) passes through the upper end of the detection box (1), and a solenoid valve (547) is provided on the second shunt pipe (514).

2. A visual inspection device according to claim 1, characterized in that: The detection box (1) is provided with a first material discharge chute (11) and a second material discharge chute (12), and a first blocking rod (111) and a second blocking rod (121) are respectively provided above the first material discharge chute (11) and the second material discharge chute (12), wherein the first blocking rod (111) is slidably connected to the detection cavity on the detection box (1), and the second blocking rod (121) is fixedly connected to the detection cavity on the detection box (1).

3. A visual inspection device according to claim 1, characterized in that: The feeding mechanism (2) includes a rotating rod (21), and the two rotating rods (21) are rotatably connected to the detection cavity on the detection box (1) through bearings. Two transmission gears (22) are fixedly installed on the rotating rod (21), and toothed belts (23) are installed on the corresponding transmission gears (22) on the two rotating rods (21). A motor (24) is fixedly installed on the back of the detection box (1), and the output shaft of the motor (24) is fixedly connected to the central rotation shaft of one of the rotating rods (21).

4. A visual inspection device according to claim 3, characterized in that: The fixing mechanism (3) includes a fixing seat (31), the fixing seat (31) is connected to the toothed belt (23), the fixing seat (31) is provided with two slide grooves, and a movable block (32) is slidably connected in the slide grooves, and the movable block (32) is fixedly connected to the inner wall of the slide groove by a tension spring (33), the fixing seat (31) is fixedly connected to a connecting rod (34), the connecting rod (34) is fixedly connected to a splint (35), a part of the connecting rod (34) is also fixedly connected to a rotating seat (36), a force-bearing rod (37) is rotatably connected to the rotating seat (36), and a torsion spring (38) is fixedly connected between the rotating shaft of the force-bearing rod (37) and the rotating seat (36).

5. The visual inspection device according to claim 1, characterized in that: The detection mechanism (4) comprises a protective shell (41) and a camera (42), wherein the protective shell (41) and the camera (42) are both fixedly mounted in a detection cavity on the detection box (1), and the camera end of the camera (42) extends into the protective shell (41). A baffle (43) is slidably inserted into the upper end of the protective shell (41), and a compression spring (44) is fixedly connected to the baffle (43), and the compression spring (44) is fixedly connected to the detection box (1).

6. A VDA joint visual inspection method, characterized by: A visual inspection device as claimed in claim 2, comprising the following steps: Step 1: Install the connector to be tested on the fixing mechanism (3), and start the feeding mechanism (2) to drive the connector on the fixing mechanism (3) to move; Step 2: When the joint moves to the detection mechanism (4), the joint is visually inspected by the detection mechanism (4); Step 3: When the joint is moving, the air delivery unit (51) is started, and the dust adhering to both ends of the joint is removed by the dust removal unit (52), and the cleaned dust is collected by the dust collection mechanism (6); Step 4: After the gas delivery unit (51) is started, the first control unit (53) operates synchronously with the gas delivery unit (51) and protects the detection mechanism (4); Step 5: When an unqualified joint is detected, the second control unit (54) is operated to drive the first blocking rod (111) to move upward. At this time, the unqualified joint is blocked by the first blocking rod (111) and falls, and is discharged along the first discharge chute (11), while the qualified joint is blocked by the second blocking rod (121) and falls, and is discharged along the second discharge chute (12).

Images