A visual inspection apparatus

Abstract

The utility model relates to visual inspection technical field discloses a kind of visual inspection equipment, including body, conveying device is equipped in body interior, fixed camera is arranged in the center of body top, and displacement adjusting mechanism is assembled in four sides of front and back and left and right.The mechanism utilizes arc mounting plate cooperation displacement drive motor, gear and arc rack structure, realize camera wide-range arc horizontal position adjustment;Through angle drive motor drive worm meshing worm gear type rotating seat, complete camera accurate pitch angle adjustment.Lighting assembly, which can be finely adjusted, is provided on the camera seat, and the height and illumination angle of the light source can be independently adjusted, which can accurately adapt to the shooting light path and effectively suppress imaging reflection.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection technology, and in particular to a visual inspection device. Background Technology

[0002] In industrial automated production, visual inspection equipment is widely used for detecting appearance defects in precision parts, plastics, hardware, and electronic products. It can replace manual screening for defects such as scratches, dents, deformations, missing materials, and color differences. Existing conveyor-type visual inspection equipment generally has a simple structure and suffers from many technical shortcomings when inspecting highly reflective curved surfaces and irregularly shaped workpieces, which seriously restricts the inspection accuracy and equipment versatility.

[0003] Existing equipment features a simple camera layout, mostly using fixed single / dual cameras. This results in a fixed shooting angle, poor adjustability, and an inability to fully cover curved surfaces, sides, and corners of the workpiece, easily creating blind spots. Furthermore, highly reflective workpieces are prone to specular glare, causing overexposure and uneven brightness in the image, which can easily lead to missed or false defects, resulting in poor detection stability. Moreover, traditional adjustable camera mechanisms are rudimentary, mostly offering only small-range tilt adjustment and lacking a wide range of horizontal azimuth adjustment capabilities. This limited adjustment freedom makes it unsuitable for multi-angle shooting needs of workpieces of different sizes and irregular shapes, leading to poor equipment versatility.

[0004] In addition, the lighting systems of existing visual inspection devices are mostly independently fixed installations, with the light source and camera being separate. After the camera angle is adjusted, the lighting cannot be synchronized, which can easily lead to problems such as lighting misalignment, shadow occlusion, and increased reflection. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a visual inspection device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: A visual inspection device includes a body, an internal conveying device, a fixed camera at the top center of the body, and displacement adjustment mechanisms arranged in all directions. Each displacement adjustment mechanism includes an arc-shaped mounting plate, both ends of which are fixed to the top of the body via connecting rods. The mounting plate has arc-shaped movable holes, and a support is located at the top center of the mounting plate. A displacement drive motor is fixed to the top of the support, and the motor shaft of the displacement drive motor extends vertically downwards into the support and is connected to a gear. The gear meshes with an arc-shaped rack. The wheel and rack are located in the internal space formed by the support and the mounting plate. A fixed rod is connected to the center of the bottom of the rack, and a fixed plate is connected to the fixed rod. A fixed seat is fixedly connected to the fixed plate. An angle drive motor is mounted on the side of the fixed seat. The angle drive motor is connected to a worm gear that is rotatably connected to the fixed seat. A rotating seat is rotatably connected to the fixed plate. A worm wheel structure is integrally formed on the outer side of the rotating seat. The worm wheel structure of the rotating seat meshes with the worm gear for transmission. A bracket is connected to one side of the rotating seat. An L-shaped camera mount is connected to the end of the bracket. An adjustable camera is fixedly mounted on the camera mount.

[0007] Furthermore, a suspension rod is connected to the top of the support, and a first fixing block is connected to the top of the suspension rod. The first fixing block is fixedly installed on the inner top of the machine body by fasteners.

[0008] Furthermore, a second fixing block is connected to the top of the connecting rod, and the second fixing block is fixedly installed on the inner top of the machine body by fasteners.

[0009] Furthermore, an upper support block is fixed to one side of the top of the camera mount, and a lower support block is fixed to the front end of the bottom side of the camera mount. A vertically arranged adjusting rod is fixed between the upper support block and the lower support block. Multiple adjusting holes are provided along the height of the adjusting rod. A sleeve is fitted on the outside of the adjusting rod, and the sleeve is fixed in the adjusting hole by fasteners. A light assembly is provided on the outside of the sleeve.

[0010] Furthermore, the lighting assembly includes a connecting post fixed to the front side of the sleeve, a lower pad is provided at the top of the connecting post, and a lighting lamp is installed on the lower pad.

[0011] Furthermore, a gooseneck rod is connected to the lighting lamp, and an upper pad is fixed to the end of the gooseneck rod. The upper pad and the lower pad are connected by fasteners.

[0012] Furthermore, an openable maintenance door is provided on one side of the machine body.

[0013] Furthermore, the machine body is equipped with a display mounted on a bracket, and an indicator light is provided on the top of the machine body.

[0014] Furthermore, the support has an internal arc-shaped receiving space that matches the arc shape of the rack; the outer contour of the rack is arranged to fit the arc-shaped inner wall of the support.

[0015] Furthermore, the outer wall of the rack is provided with an arc-shaped slider, the cross-section of the arc-shaped slider is a T-shaped structure, and the inner wall of the support is provided with a corresponding arc-shaped groove, the arc-shaped slider and the arc-shaped groove are fitted and slidably connected. Beneficial effects

[0016] Compared with the prior art, the present invention has at least the following advantages: This invention employs a central fixed camera and four sets of four adjustable cameras to form a five-camera setup. Combined with the dual-degree-of-freedom adjustment structure of the adjustable cameras, which allows for a wide range of arc-shaped horizontal displacement adjustment and pitch angle adjustment, it enables 360° image acquisition of the workpiece without blind spots. This effectively avoids the shooting blind spots of traditional fixed cameras and specifically addresses the problems of glare and overexposure in images of highly reflective and irregularly shaped workpieces. It significantly reduces the probability of missed or false defects and improves detection accuracy.

[0017] This invention achieves horizontal arc-shaped displacement of the camera through gear meshing and rack transmission, and achieves precise adjustment of the camera's pitch angle through worm gear meshing. The two adjustment structures are independent and do not interfere with each other, allowing for flexible adjustment of the shooting angle according to the workpiece size and shape. Simultaneously, the worm gear possesses mechanical self-locking characteristics, resisting vibrations from industrial equipment, ensuring no angle deviation over long-term use, and exhibiting excellent detection stability.

[0018] This utility model relies on the adjusting rod and sleeve to realize the height adjustment of the lighting lamp. With the help of the gooseneck rod, the tilt angle of the lighting lamp can be finely adjusted in multiple angles, which can accurately match the lighting needs of different shooting angles and suppress reflections and eliminate shadows from the source of the light path. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0020] Figure 2 This is a top view of the structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the displacement adjustment mechanism of this utility model.

[0022] Figure 4 This is a schematic diagram of the angle adjustment mechanism of this utility model.

[0023] Figure 5 This is a schematic diagram of the displacement adjustment mechanism and angle adjustment mechanism of this utility model.

[0024] Figure 6This is a schematic diagram of the lighting adjustment mechanism of this utility model.

[0025] The diagram is labeled as follows: 1-Main body; 2-Transfer device; 3-Indicator light; 4-Display; 5-Inspection door; 6-Adjustable camera; 7-Hanging rod; 8-Adjusting seat; 80-Support; 81-Mounting plate; 82-Moving hole; 9-Rack; 10-Connecting rod; 11-Displacement drive motor; 12-Gear; 13-Fixing rod; 14-Fixing plate; 15-Fixing seat; 16-Worm gear; 17-Angle drive motor; 18-Camera mount; 19-Bracket; 20-Rotating seat; 21-Fixing camera; 22-First fixing block; 23-Second fixing block; 24-Lower support block; 25-Upper support block; 26-Adjusting rod; 27-Sleeve; 28-Connecting column; 29-Lower pad; 30-Upper pad; 31-Gooseneck rod; 32-Lighting lamp; 33-Arc-shaped slider; 34-Arc-shaped groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, a detailed description is provided below in conjunction with the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] See Figures 1-6 This embodiment provides a visual inspection device, including a body 1. The body 1 is equipped with a conveying device 2 for conveying the workpiece to be inspected. A fixed camera 21 for acquiring reference images is set at the top center of the body 1. The body 1 is equipped with displacement adjustment mechanisms in the front, back, left and right directions.

[0030] The displacement adjustment mechanism includes an arc-shaped mounting plate 81. Both ends of the mounting plate 81 are fixed to the top of the body 1 by two connecting rods 10. The mounting plate 81 has an arc-shaped movable hole 82. A support 80 is located at the center of the top of the mounting plate 81. The longitudinal section of the support 80 is an inverted U-shape, with its two ends spanning the sides of the movable hole 82. A displacement drive motor 11 is fixed to the top of the support 80. The motor shaft of the displacement drive motor 11 extends vertically downwards into the support 80 and is fixedly connected to a gear 12. The gear 12 meshes with an arc-shaped rack 9. The mounting plate 81 and the top support 80 cooperate to form an integrated adjustment seat 8, providing a stable installation reference and limiting space for the sliding movement of the rack.

[0031] Both the rack 9 and the movable hole 82 are arc structures on the circumference, with consistent curvature and matching arcs to ensure a close fit of the movement trajectory. The arc lengths of the rack 9 and the movable hole 82 are unequal, and the overall width of the rack 9 is greater than the diameter of the movable hole 82, so that the rack 9 is locked onto the top end face of the movable hole 82 to form a vertical limiting structure, effectively preventing the rack 9 from slipping out of the movable hole 82 during sliding, resulting in strong motion stability. The gear 12 and the rack 9 are both housed in the internal space formed by the support 80 and the mounting plate 81, with the gear 12 arranged on the inner side and the rack 9 correspondingly arranged on the outer side. The support 80 has a reserved arc-shaped receiving space that matches the arc shape of the rack 9; the outer contour of the rack is arranged to fit the arc-shaped inner wall of the support. During the arc-shaped sliding process, the rack 9 can be laterally limited by the arc-shaped inner wall of the support 80, effectively restricting the rack 9 from shifting left and right or swinging, ensuring that the rack and the inner gear always maintain a precise meshing state, and move smoothly along the preset arc trajectory, so that the gear and rack meshing clearance remains constant, greatly improving the transmission accuracy and running smoothness. Preferably, the outer wall of the rack is provided with an arc-shaped slider 33, the cross-section of which is a T-shaped structure, and the inner wall of the support 80 is provided with a corresponding matching arc-shaped groove 34. The arc-shaped slider 33 and the arc-shaped groove 34 are fitted and slidably connected. During the arc-shaped sliding process, the rack 9 can achieve high-precision lateral limiting and anti-slip limiting by the fitting of the arc-shaped slider 33 and the arc-shaped groove 34, further improving the stability and guiding accuracy of the arc-shaped sliding process.

[0032] A fixing rod 13 is fixedly connected to the bottom center of the rack 9, and the fixing rod 13 is connected to a fixing plate 14 with a triangular structure. A fixing seat 15 with a J-shaped structure is fixedly connected to the fixing plate 14. An angle drive motor 17 is mounted on the side of the fixing seat 15. The output shaft of the angle drive motor 17 is fixedly connected to a worm gear 16 rotatably connected to the fixing seat 15. A rotating seat 20 is rotatably connected to the fixing plate 14. A worm wheel structure is integrally formed on the outer side of the rotating seat 20, and the worm wheel structure precisely meshes with the worm gear 16 for transmission. A bracket 19 is connected to one side of the rotating seat 20, and an L-shaped camera mount 18 is connected to the end of the bracket 19. An adjustable camera 6 is fixedly mounted on the camera mount 18. Through the meshing transmission of the worm gear 16 and worm wheel structure, the rotating seat 20 can drive the camera mount 18 and the adjustable camera 6 to complete precise pitch angle adjustment. Furthermore, the worm gear 16 and worm wheel structure has a self-locking characteristic, which can effectively resist industrial vibration and ensure stable shooting angle without deviation.

[0033] A vertically arranged suspension rod 7 is fixedly connected to the top of the support 80. A first fixing block 22 is fixedly connected to the top of the suspension rod 7. The first fixing block 22 is locked and fixed to the inner top of the body 1 by screws and fasteners, realizing the overall suspension installation of the support 80. A second fixing block 23 is fixedly connected to the top of the connecting rod 10. The second fixing block 23 is fixedly installed to the inner top of the body 1 by screws and fasteners, realizing the stable hoisting of both ends of the mounting plate 81, and greatly improving the seismic stability of the overall mechanism.

[0034] An upper support block 25 is fixed to one side of the top of the camera mount 18, and a lower support block 24 is fixed to the front end of the bottom side of the camera mount. An adjusting rod 26 is vertically fixed between the upper support block 25 and the lower support block 24. Multiple adjusting holes are evenly arranged along the height of the adjusting rod 26. The adjusting holes are threaded holes. A slidable sleeve 27 is sleeved on the outside of the adjusting rod 26. The sleeve 27 is provided with a fixing hole. The sleeve 27 is locked and fixed in the corresponding adjusting hole by screw fasteners passing through the fixing hole, thereby realizing the height adjustment of the light source assembly.

[0035] A lighting assembly is provided on the outer side of the sleeve 27. The lighting assembly includes a connecting post 28 fixed to the front side of the sleeve 27, and a lower pad 29 fixed to the top of the connecting post 28. A lighting lamp is installed on the lower pad 29. A bendable gooseneck rod 31 is connected to the back of the lighting lamp 32. An upper pad 30 is fixed to the end of the gooseneck rod 31. The upper pad 30 and the lower pad 29 are locked together by screws and nuts. Relying on the flexible bending characteristics of the gooseneck rod 31, the lighting angle can be finely adjusted at any angle, and it can be automatically fixed and locked after adjustment without the need for a complex locking structure.

[0036] The machine body 1 is provided with an openable maintenance door 5 on one side, which facilitates the daily inspection and maintenance of the internal transmission structure, circuit and photographic equipment; the machine body 1 is equipped with a display 4 by a bracket, which is used to display the detection images and detection data in real time.

[0037] The top of the machine body 1 is equipped with an indicator light 3, which is used to indicate the operation, fault, and standby status of the equipment.

[0038] During operation, the workpiece to be inspected is conveyed at a constant speed to the inspection station by the conveying device 2 inside the machine body 1. The fixed camera 21 at the top center of the machine body is responsible for acquiring the reference top surface image of the workpiece, which serves as the basic image data for inspection; the displacement adjustment mechanisms on the front, back, left, and right sides of the machine body work synchronously to achieve multi-angle dynamic imaging.

[0039] The displacement drive motor 11 drives the rack 9 to slide along the arc-shaped movable hole via the gear 12, driving the adjustable camera 6 to complete a large-range arc-shaped horizontal displacement, flexibly switching the horizontal shooting position, and covering areas prone to blind spots such as the perimeter and corners of the workpiece. The angle drive motor 17 drives the rotating seat 20 to drive the camera seat 18 and the adjustable camera 6 to complete precise pitch angle adjustment through the worm gear meshing worm wheel structure. The mechanical self-locking characteristics of the worm wheel and worm gear ensure that the adjusted shooting angle is stably locked. Through the independent adjustment of the two degrees of freedom of the adjustable cameras, the four adjustable cameras can be combined with the central fixed camera to form an all-round five-camera shooting system, completely eliminating blind spots in workpiece shooting.

[0040] The drive stroke of the displacement drive motor 11 matches the arc-shaped stroke of the movable hole 82, thereby limiting the fixed rod 13 and the bottom fixed plate 14 to only perform arc-shaped sliding motion within the preset stroke range of the movable hole. It should be noted that the four sets of displacement adjustment mechanisms are arranged circumferentially around the machine body, and each set of racks independently performs arc-shaped sliding, with their movement trajectories avoiding each other and not interfering with each other.

[0041] Before and during the inspection, staff can manually adjust the lighting components according to the workpiece material, curved surface structure, and actual reflectivity: the height of the lighting lamp can be precisely adjusted by sliding and locking the sleeve on the adjusting rod; and the illumination angle of the lighting lamp can be manually fine-tuned by relying on the gooseneck rod's ability to be bent and shaped at will.

[0042] During equipment operation, the top indicator light displays the equipment's operating, fault, and standby status in real time, while the monitor synchronously collects images and detection data. Combined with the opening and closing maintenance door on the side of the machine, daily maintenance and repair of the equipment can be easily completed, ensuring long-term stable and high-precision automated detection operation.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A visual inspection device, characterized in that, The device includes a main body, inside which a conveying device is installed. A fixed camera is located at the center of the top of the main body. Displacement adjustment mechanisms are located in all directions on the front, back, left, and right sides of the main body. Each displacement adjustment mechanism includes an arc-shaped mounting plate. Both ends of the mounting plate are fixed to the top of the main body via connecting rods. The mounting plate has arc-shaped movable holes. A support is located at the center of the top of the mounting plate. A displacement drive motor is fixed to the top of the support. The motor shaft of the displacement drive motor extends vertically downwards into the support and is connected to a gear. The gear meshes with an arc-shaped rack. The gear and rack... Located within the internal space formed by the support and the mounting plate, a fixed rod is connected to the center of the bottom of the rack, the fixed rod is connected to a fixed plate, and a fixed seat is fixedly connected to the fixed plate. An angle drive motor is mounted on the side of the fixed seat, and the angle drive motor is connected to a worm gear rotatably connected to the fixed seat. A rotating seat is rotatably connected to the fixed plate, and a worm wheel structure is integrally formed on the outer side of the rotating seat. The worm wheel structure of the rotating seat meshes with the worm gear for transmission. A bracket is connected to one side of the rotating seat, and an L-shaped camera mount is connected to the end of the bracket. An adjustable camera is fixedly mounted on the camera mount.

2. The visual inspection device according to claim 1, characterized in that, The top of the support is connected to a suspension rod, and the top of the suspension rod is connected to a first fixing block. The first fixing block is fixedly installed on the inner top of the machine body by fasteners.

3. The visual inspection device according to claim 1, characterized in that, The top of the connecting rod is connected to a second fixing block, which is fixedly installed on the inner top of the machine body by fasteners.

4. The visual inspection device according to claim 1, characterized in that, An upper support block is fixed to one side of the top of the camera mount, and a lower support block is fixed to the front end of the bottom side of the camera mount. A vertically arranged adjusting rod is fixed between the upper support block and the lower support block. Multiple adjusting holes are provided along the height of the adjusting rod. A sleeve is fitted on the outside of the adjusting rod, and the sleeve is fixed in the adjusting holes by fasteners. A light assembly is provided on the outside of the sleeve.

5. A visual inspection device according to claim 4, characterized in that, The lighting assembly includes a connecting post fixed to the front side of the sleeve, a lower pad is provided at the top of the connecting post, and a lighting lamp is installed on the lower pad.

6. A visual inspection device according to claim 5, characterized in that, The lighting lamp is connected to a gooseneck rod, and an upper pad is fixed to the end of the gooseneck rod. The upper pad and the lower pad are connected by fasteners.

7. A visual inspection device according to claim 1, characterized in that, One side of the machine body is equipped with an openable maintenance door.

8. A visual inspection device according to claim 1, characterized in that, The machine body is equipped with a display via a bracket, and an indicator light is located on the top of the machine body.

9. A visual inspection device according to claim 1, characterized in that, The support has an internal arc-shaped receiving space that matches the arc shape of the rack; the outer contour of the rack is arranged to fit the arc-shaped inner wall of the support.

10. A visual inspection device according to claim 9, characterized in that, The outer wall of the rack is provided with an arc-shaped slider, the cross-section of which is a T-shaped structure. The inner wall of the support is provided with a matching arc-shaped groove, and the arc-shaped slider and the arc-shaped groove are fitted and slidably connected.

Images