A flaw detection device for acquiring an image of an outer surface of a wheel hub

Abstract

This invention addresses the problem of difficulty in acquiring side images of wheel hubs in existing wheel hub inspection equipment. It provides a defect detection device for acquiring images of the outer surface of wheel hubs, including a transmission structure, a front sampling structure, a side sampling structure, a lifting and rotating structure, and a fixture. The front sampling structure includes a first sampling camera and a robotic arm. The first sampling camera is located at the moving end of the robotic arm, and the base of the robotic arm is fixedly mounted on the side of the transmission structure. The side sampling structure includes several second sampling cameras and camera sliding bases. The camera sliding bases are respectively located on both sides of the transmission structure and slide towards or away from the transmission structure. The second sampling cameras are mounted on the camera sliding bases. The lifting and rotating structure is located below the transmission structure and is used to control the lifting and rotating of the wheel hub. The fixture is located below the transmission structure and is used to clamp and position the wheel hub. This provides a comprehensive image of the outer surface of the wheel hub.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub production equipment technology, and in particular to a defect detection device for acquiring images of the outer surface of a wheel hub. Background Technology

[0002] With the rapid development of the automotive manufacturing industry, automobile production and ownership are constantly increasing. As an important component of automobiles, the quality and performance of wheel hubs have a significant impact on driving safety. Therefore, the demand for quality inspection of wheel hubs is also increasing, especially the detection of surface defects, to ensure the integrity and reliability of the wheel hubs.

[0003] In recent years, with the continuous development of machine vision technology, its application in the detection of surface defects in automobile wheel hubs has become increasingly widespread. Machine vision inspection systems convert the wheel hub into image signals using industrial cameras, which are then transmitted to image processing software systems. Based on information such as pixel distribution and brightness, these signals are converted into digital signals. The image processing software systems then perform calculations on these signals to extract features from the original image for comparison, enabling simultaneous detection of multiple defect types. This technology has advantages such as high detection speed, high detection rate, and high detection accuracy, greatly improving the efficiency and quality of surface defect detection in automobile wheel hubs, as illustrated in patents with publication numbers CN119666751A and CN118858157A. However, existing wheel hub conveyor inspection structures typically only acquire images from directly above the wheel hub, lacking images of the sides, making it difficult to comprehensively detect defects on the outer surface of the wheel hub. Therefore, a defect detection device capable of acquiring images of the outer surface of the wheel hub is needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a defect detection device for acquiring images of the outer surface of wheel hubs.

[0005] To solve the above problems, the present invention adopts the following solution:

[0006] A defect detection device for acquiring images of the outer surface of a wheel hub includes a transmission structure for transporting the wheel hub, a front sampling structure for acquiring front images of the wheel hub, a side sampling structure for acquiring side images of the wheel hub, a lifting and rotating structure for lifting and rotating the wheel hub, and a clamp for clamping the wheel hub. The front sampling structure includes a first sampling camera and a robotic arm. The first sampling camera is mounted on the moving end of the robotic arm, and the base of the robotic arm is fixedly mounted on the side of the transmission structure. The side sampling structure includes several second sampling cameras and camera sliding bases. The camera sliding bases are respectively mounted on both sides of the transmission structure and slide towards or away from the transmission structure. The second sampling cameras are mounted on the camera sliding bases. The lifting and rotating structure is located below the transmission structure and is used to control the lifting and rotating of the wheel hub. The clamp is located below the transmission structure and is used to clamp and position the wheel hub.

[0007] Furthermore, the camera sliding base has a vertical camera connecting plate on its slider, and two or more second sampling cameras are mounted on the camera connecting plate; all the second sampling cameras face the transmission structure, and different second sampling cameras are at different set angles to the horizontal direction.

[0008] Furthermore, the side sampling structure also includes a side lighting structure, which is disposed on the slider of the camera sliding base.

[0009] Furthermore, the side lighting structure includes a lighting base, a lighting strip, and a connecting seat; wherein the lighting base is fixedly mounted on the slider, and the lighting base is provided with a groove parallel to the transmission structure, and the connecting seat is slidably mounted in the groove; the connecting seat is also rotatably mounted with a lighting strip, which is vertically mounted.

[0010] Furthermore, the lifting and rotating structure includes a lifting cylinder, a rotary motor, a transmission structure, a rotating shaft, a rotating bushing, a lifting seat, and a fixed seat; wherein the fixed seat is fixedly disposed below the transmission structure, and the lifting cylinder and the rotary motor are fixedly disposed on the fixed seat; the rotary motor is drivenly connected to the rotating shaft; the rotating bushing is disposed on the outside of the rotating shaft and is used to drive the rotating shaft to rotate, and the rotating bushing is also drivenly connected to the rotary motor through the transmission structure; the lifting seat is disposed at one end of the rotating shaft and is used to support the wheel hub.

[0011] Furthermore, the lifting seat includes a horizontal support plate and a vertical support plate, wherein both the horizontal support plate and the vertical support plate are located in the horizontal direction and are spaced 90 degrees apart; the horizontal support plate and the vertical support plate are fixedly connected; and the upper surfaces of both the horizontal support plate and the vertical support plate are provided with protective plates to increase friction with the wheel hub.

[0012] Furthermore, it also includes a barrier structure, which is located at one end of the transmission structure that is fed into the hub.

[0013] Furthermore, the fixture includes an actuating cylinder, a connecting plate, and clamping wheels; wherein the actuating cylinder is slidably mounted on a fixed base; two actuating cylinders are mounted on the fixed base, and the two actuating cylinders face opposite directions; the actuating direction of the actuating cylinder is located in a horizontal plane and is perpendicular to the transmission direction of the transmission structure; the connecting plate is mounted on the movable end of the actuating cylinder; the clamping wheels are rotatably mounted on the connecting plate, and each connecting plate is equipped with two clamping wheels.

[0014] Furthermore, the barrier structure includes a barrier plate that can be raised and lowered.

[0015] Furthermore, the barrier structure also includes a barrier cylinder and a barrier frame. One end of the barrier cylinder is fixedly mounted on the barrier frame, and the other end of the barrier cylinder is fixedly connected to the barrier plate. A sliding structure with sliding fit is also provided between the barrier plate and the barrier frame.

[0016] The beneficial effects of this utility model are as follows:

[0017] By setting up a first sampling camera on the front and a second sampling camera on the side, and cooperating with a lifting and rotating structure, multi-directional images of the wheel hub can be acquired, obtaining a more comprehensive image of the outer side of the wheel hub, providing an image basis for accurate wheel hub defect detection;

[0018] By setting up a second sampling camera at multiple angles, images of the wheel hub side can be captured more effectively;

[0019] By setting up a lifting and rotating structure, the wheel hub can be controlled to rise and rotate, making it easier for the second sampling camera to capture images of the side of the wheel hub;

[0020] By setting up a blocking structure, only one wheel hub is photographed at a time, thus avoiding interference. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0022] Figure 2 A schematic diagram of the overall structure of Example 1 without the obstructing structure;

[0023] Figure 3 This is a schematic diagram of the side sampling structure in Example 1;

[0024] Figure 4 This is a schematic diagram of the lifting and rotating structure of Example 1;

[0025] Figure 5 This is a top view of the lifting and rotating structure of Embodiment 1;

[0026] Figure 6 for Figure 5 A schematic diagram of the AA cross-section;

[0027] Figure 7 This is a schematic diagram of the fixture in Example 1;

[0028] Figure 8 This is a schematic diagram of the blocking structure in Example 1;

[0029] Explanation of reference numerals in the attached diagram: 1. Transmission structure; 2. Front sampling structure; 2. First sampling camera; 21. Robotic arm; 22. Side sampling structure; 3. Second sampling camera; 31. Camera sliding base; 32. Camera connecting plate; 33. Side lighting structure; 34. Lighting base; 341. Lighting strip; 342. Connecting seat; 343. Slide groove; 344. Lifting and rotating structure; 4. Lifting cylinder; 41. Rotary motor; 42. Transmission structure; 43. Rotating shaft; 44. Rotating bushing; 45. Lifting seat; 46. Horizontal support plate; 461. Longitudinal support plate; 462. Protective plate; 463. Fixed seat; 47. Clamp; 5. Action cylinder; 51. Connecting plate; 52. Clamping wheel; 53. Barrier structure; 6. Barrier plate; 61. Barrier cylinder; 62. Barrier frame; 63. Sliding structure; 64. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] Example 1:

[0033] like Figures 1-8As shown, a defect detection device for acquiring images of the outer surface of a wheel hub includes a transmission structure 1 for transporting the wheel hub. In this example, the transmission structure 1 is a roller conveyor belt, with a set distance between adjacent rollers to facilitate the setting of other motion structures. It also includes a front sampling structure 2 for acquiring images of the front of the wheel hub, a side sampling structure 3 for acquiring images of the side of the wheel hub, a lifting and rotating structure 4 for lifting and rotating the wheel hub, and a clamp 5 for clamping the wheel hub. The front sampling structure 2 includes a first sampling camera 21 and a robotic arm 22. The first sampling camera 21 is located at the moving end of the robotic arm 22, and the base of the robotic arm 22 is fixedly located on the side of the transmission structure 1. The side sampling structure 3 includes several second sampling cameras 31 and camera sliding bases 32. The camera sliding bases 32 are respectively located on both sides of the transmission structure 1 and slide towards or away from the transmission structure 1. The second sampling cameras 31 are located on the camera sliding bases 32. The lifting and rotating structure 4 is located below the transmission structure 1 and is used to control the lifting and rotating of the wheel hub. The clamp 5 is located below the transmission structure 1 and is used to clamp and position the wheel hub. When the wheel hub is transported through the transmission structure 1, the clamp 5 first positions the wheel hub, and then the robotic arm 22 controls the first sampling camera 21 to acquire an image of the front of the wheel hub; then the clamp 5 releases the wheel hub, the lifting and rotating structure 4 controls the wheel hub to rise and rotate slowly, and the side sampling structure 3 acquires an image of the side of the wheel hub, thus realizing the acquisition of an image of the outer surface of the wheel hub.

[0034] The camera sliding base 32 has a vertically oriented camera connecting plate 33 on its slider. The camera connecting plate 33 has two or more second sampling cameras 31. In this example, three second sampling cameras 31 are arranged sequentially from top to bottom on the camera connecting plate 33. All the second sampling cameras 31 face the transmission structure 1. Different second sampling cameras 31 are at different set angles to the horizontal direction. Because the side of the wheel hub is not flat, but has a concave groove, the image of the side of the wheel hub can be acquired from multiple angles by using the second sampling cameras 31. A more accurate image of the side of the wheel hub can be obtained by stitching together the images from different second sampling cameras 31. The side sampling structure 3 also includes a side lighting structure 34, which is mounted on the slider of the camera sliding base 32 and moves with the second sampling camera 31. In this example, the side lighting structure 34 includes a lighting base 341, a lighting strip 342, and a connecting seat 343. The lighting base 341 is fixedly mounted on the slider and has a groove 344 parallel to the transmission structure 1. The connecting seat 343 is slidably mounted in the groove 344, and two connecting seats 343 are mounted in the groove 344. In this example, the lighting base is generally square, and two grooves are provided on the upper and lower edges of the lighting base. The connecting seat 343 is also rotatably mounted with a lighting strip 342, which is vertically mounted. This allows the horizontal position of the two connecting seats 343 in the groove 344 to be adjusted, and the lighting strip 342 can be rotated to adjust the lighting direction to obtain a better lighting effect.

[0035] The lifting and rotating structure 4 includes a lifting cylinder 41, a rotary motor 42, a transmission structure 43, a rotating shaft 44, a rotating bushing 45, a lifting seat 46, and a fixed seat 47. The fixed seat 47 is fixedly disposed below the transmission structure 1, and the lifting cylinder 41 and the rotary motor 42 are fixedly disposed on the fixed seat 47. The rotary motor 42 is connected to the rotating shaft 44 via a transmission mechanism. The rotating bushing 45 is disposed on the outside of the rotating shaft and is used to drive the rotating shaft 44 to rotate. The rotating bushing 45 is also connected to the rotary motor 42 via the transmission structure 43. In this example, the transmission structure 43 uses a synchronous belt and a synchronous pulley. The lifting seat 46 is disposed at one end of the rotating shaft 44 and is used to support the wheel hub. The lifting seat 46 includes a horizontal support plate 461 and a vertical support plate 462, both of which are located horizontally and are spaced 90 degrees apart. The horizontal support plate 461 and the vertical support plate 462 are fixedly connected. Protective plates 463 for increasing friction with the wheel hub are provided on the upper surfaces of both the horizontal support plate 461 and the vertical support plate 462. After the wheel hub rises with the lifting cylinder 41, the rotary motor 42 drives the rotating bushing 45 to rotate via the transmission structure 43, which in turn drives the rotating shaft 44 inside the rotating bushing 45 to rotate, thus controlling the rotation of the wheel hub.

[0036] The clamp 5 includes an actuating cylinder 51, a connecting plate 52, and clamping wheels 53. The actuating cylinder 51 is slidably mounted on a fixed base 47. Two actuating cylinders 51 are mounted on the fixed base 47, and the two actuating cylinders 51 face opposite directions. In this example, the actuating cylinder 51 uses a sliding cylinder seat and a piston rod. The sliding cylinder seat is slidably mounted on the piston rod, and the piston rod is fixedly mounted above the fixed base 47. The actuating direction of the actuating cylinder 51 is in the horizontal plane and perpendicular to the transmission direction of the transmission structure 1. The connecting plate 52 is located at the movable end of the actuating cylinder 51. The clamping wheels 53 are rotatably mounted on the connecting plate 52, and two clamping wheels 53 are mounted on each connecting plate 52. It should be noted that the intersection of the lines connecting the four clamping wheels 53 on the two connecting plates 52 coincides with the axis of the lifting cylinder 41 in the lifting and rotating structure 4, ensuring that the axis of the clamping and positioning hub is aligned with the axis of the lifting cylinder 41, allowing it to rotate in the center.

[0037] The system also includes a barrier structure 6, which is located at one end of the hub in the transmission structure 1. This barrier structure blocks the hub on the transmission structure 1, ensuring that only one hub is present at the corresponding workstations of the first sampling camera 21 and the second sampling camera 31, thus preventing interference. The barrier structure 6 includes a liftable barrier plate 61. The barrier structure 6 also includes a barrier cylinder 62 and a barrier frame 63. One end of the barrier cylinder 62 is fixedly mounted on the barrier frame 63, and the other end is fixedly connected to the barrier plate 61. A sliding structure 64 is also provided between the barrier plate 61 and the barrier frame 63. In this example, the barrier frame 63 is shaped like a "door," with slide rails on both sides. A slider corresponding to the slide rails is provided on the barrier plate 61, and the slider slides into the slide rails.

[0038] During implementation, by setting up a front-facing first sampling camera 21 and a side-facing second sampling camera 31, along with a lifting and rotating structure 4, multi-directional images of the wheel hub are acquired, providing a more comprehensive image of the outer side of the wheel hub and laying the image foundation for accurate wheel hub defect detection. By setting up a multi-angle second sampling camera 31, images of the wheel hub's side are better acquired. By setting up a lifting and rotating structure 4, the wheel hub is controlled to rise and rotate, facilitating the acquisition of side images by the second sampling camera 31. By setting up a blocking structure 6, only one wheel hub is photographed at a time, avoiding interference.

[0039] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.

Claims

1. A flaw detection device for acquiring images of the outer surface of a wheel hub, comprising a transport structure (1) for transporting the wheel hub, characterized in that It also includes a front sampling structure (2) for acquiring front images of the wheel hub, a side sampling structure (3) for acquiring side images of the wheel hub, a lifting and rotating structure (4) for lifting and rotating the wheel hub, and a clamp (5) for clamping the wheel hub; wherein the front sampling structure (2) includes a first sampling camera (21) and a robotic arm (22), the first sampling camera (21) is set at the action end of the robotic arm (22), and the base of the robotic arm (22) is fixedly set on the side of the transmission structure (1); the side sampling structure (3) includes several second sampling cameras (31) and camera sliding bases (32), the camera sliding bases (32) are respectively set on both sides of the transmission structure (1) and slide toward or away from the transmission structure (1); The second sampling camera (31) is mounted on the camera sliding base (32); the lifting and rotating structure (4) is mounted below the transmission structure (1) and is used to control the lifting and rotating of the hub; the clamp (5) is mounted below the transmission structure (1) and is used to clamp and position the hub.

2. The flaw detection device for acquiring an image of an outer surface of a wheel hub according to claim 1, characterized in that, The camera sliding base (32) has a vertical camera connecting plate (33) on its slider, and two or more second sampling cameras (31) are provided on the camera connecting plate (33); all the second sampling cameras (31) face the transmission structure (1), and different second sampling cameras (31) are at different set angles to the horizontal direction.

3. The flaw detection apparatus for acquiring an image of an outer surface of a wheel hub according to claim 2, characterized in that, The side sampling structure (3) also includes a side lighting structure (34), which is set on the slider of the camera sliding base (32).

4. The flaw detection apparatus for acquiring an image of an outer surface of a wheel hub according to claim 3, characterized in that, The side lighting structure (34) includes a lighting base (341), a lighting strip (342), and a connecting seat (343); wherein the lighting base (341) is fixedly mounted on the slider, and the lighting base (341) is provided with a groove (344) parallel to the transmission structure (1), and the connecting seat (343) is slidably mounted in the groove (344); the connecting seat (343) is also rotatably mounted with a lighting strip (342), and the lighting strip (342) is vertically mounted.

5. The flaw detection apparatus for acquiring an image of an outer surface of a wheel hub according to claim 1, wherein The lifting and rotating structure (4) includes a lifting cylinder (41), a rotating motor (42), a transmission structure (43), a rotating shaft (44), a rotating bushing (45), a lifting seat (46), and a fixed seat (47); wherein the fixed seat (47) is fixedly installed below the transmission structure (1), and the lifting cylinder (41) and the rotating motor (42) are fixedly installed on the fixed seat (47); the rotating motor (42) is connected to the rotating shaft (44) through a transmission; the rotating bushing (45) is installed on the outside of the rotating shaft and is used to drive the rotating shaft (44) to rotate. The rotating bushing (45) is also connected to the rotating motor (42) through the transmission structure (43); the lifting seat (46) is installed at one end of the rotating shaft (44) and is used to lift the wheel hub.

6. The flaw detection apparatus for acquiring an image of an outer surface of a wheel hub according to claim 5, wherein The lifting seat (46) includes a transverse support plate (461) and a longitudinal support plate (462), wherein the transverse support plate (461) and the longitudinal support plate (462) are both located in the horizontal direction and are spaced 90 degrees apart; the transverse support plate (461) and the longitudinal support plate (462) are fixedly connected; the upper surfaces of the transverse support plate (461) and the longitudinal support plate (462) are provided with protective plates (463) for increasing friction with the wheel hub.

7. The flaw detection apparatus for acquiring an image of an outer surface of a wheel hub according to claim 5, wherein The clamp (5) includes an actuating cylinder (51), a connecting plate (52), and clamping wheels (53); wherein the actuating cylinder (51) is slidably disposed on the fixed seat (47); two actuating cylinders (51) are disposed on the fixed seat (47), and the two actuating cylinders (51) are oriented in opposite directions; the actuating direction of the actuating cylinder (51) is located in the horizontal plane and is perpendicular to the transmission direction of the transmission structure (1); the connecting plate (52) is disposed on the movable end of the actuating cylinder (51); the clamping wheels (53) are rotatably disposed on the connecting plate (52), and two clamping wheels (53) are disposed on each connecting plate (52).

8. A defect detection device for acquiring an image of the outer surface of a wheel hub according to claim 1, characterized in that, It also includes a barrier structure (6), which is disposed at one end of the transmission structure (1) that is fed into the hub.

9. A defect detection device for acquiring an image of the outer surface of a wheel hub according to claim 8, characterized in that, The barrier structure (6) includes a barrier plate (61) that can be raised and lowered.

10. The flaw detection apparatus for acquiring an image of an outer surface of a wheel hub according to claim 9, wherein The barrier structure (6) also includes a barrier cylinder (62) and a barrier frame (63). One end of the barrier cylinder (62) is fixedly mounted on the barrier frame (63), and the other end of the barrier cylinder (62) is fixedly connected to the barrier plate (61). A sliding structure (64) with sliding fit is also provided between the barrier plate (61) and the barrier frame (63).

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