Wheel hub front face image acquisition device

Abstract

The utility model discloses solve the problem that the effective positioning of wheel hub is lacked in the wheel hub image sampling device, provide a kind of wheel hub front image acquisition device, including the sampling camera for gathering wheel hub image;Still include the mechanical hand for controlling sampling camera movement, the positioning camera for checking wheel hub direction, transmission structure and clamping positioning structure;Wherein the positioning camera is provided in the upper of transmission structure;Clamping positioning structure is set on transmission structure, and the position of clamping positioning structure corresponds with positioning camera;Mechanical hand is set on the side of transmission structure, and the movable end portion of mechanical hand is fixedly provided with sampling camera, and mechanical hand is correspondingly set with clamping positioning structure;The wheel hub on transmission structure is clamped and positioned, and it is convenient for positioning camera and sampling camera to gather image.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub production equipment technology, and in particular to a wheel hub front image acquisition device. 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 wheel hub images into 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 then processes these signals to extract features from the original image for comparison, enabling simultaneous detection of multiple defect types. This technology boasts advantages such as high detection speed, high detection rate, and high detection accuracy, significantly improving the efficiency and quality of automobile wheel hub surface defect detection, as illustrated in patents CN119666751A and CN118858157A. However, existing wheel hub conveying and inspection structures typically employ simple positioning, lacking precise wheel hub positioning. This makes it difficult for cameras to acquire images of wheel hubs in close proximity, increasing the difficulty and accuracy of wheel hub image detection. Therefore, a wheel hub front image acquisition device capable of effective positioning is needed. Summary of the Invention

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

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

[0006] A device for acquiring a frontal image of a wheel hub includes a sampling camera for acquiring wheel hub images; it also includes a robotic arm for controlling the movement of the sampling camera, a positioning camera for verifying the wheel hub orientation, a transmission structure, and a clamping and positioning structure; wherein the positioning camera is disposed directly above the transmission structure; the clamping and positioning structure is disposed on the transmission structure, and the position of the clamping and positioning structure corresponds to that of the positioning camera; the robotic arm is disposed on one side of the transmission structure, and the sampling camera is fixedly disposed at the movable end of the robotic arm, and the robotic arm is correspondingly disposed to the clamping and positioning structure.

[0007] Furthermore, the positioning camera is fixedly mounted above the transmission structure via a camera support bracket, with the positioning camera facing the front of the wheel hub being transmitted on the transmission structure.

[0008] Furthermore, an adjustment structure is provided between the positioning camera and the camera support frame; the adjustment structure includes a support frame, a first connecting plate and a second connecting plate; the support frame is slidably disposed on the camera support frame, and its sliding direction is located in the horizontal plane; the first connecting plate is slidably disposed on the support frame; the second connecting plate is rotatably disposed on the first connecting plate.

[0009] Furthermore, the clamping and positioning structure includes two gripper mechanisms arranged opposite each other on both sides of the transmission structure; each gripper mechanism includes two rotatable gripper arms; one end of each gripper arm is rotatably connected to a support member of the gripper arm via a connecting shaft.

[0010] Furthermore, one end of the clamping arm is rotatably connected to the clamping arm support via a coupling.

[0011] Furthermore, the clamping and positioning structure also includes an actuation mechanism, which includes a first cylinder, a connecting rod assembly, and gears; wherein the gears are fixedly mounted on the coupling shaft; the gears on the two clamping arms in the same clamping jaw structure mesh with each other; the first cylinder is fixedly connected to the coupling shaft on the clamping arm through the connecting rod assembly, and is used to control the rotation of the coupling shaft.

[0012] Furthermore, the linkage assembly includes a first linkage, a second linkage, and a third linkage. The middle portion of the first linkage is fixedly connected to a clamping arm in one of the clamping structures via a connecting shaft. One end of the first linkage is rotatably connected to the movable end of the first cylinder, and the other end of the first linkage is rotatably connected to one end of the second linkage. The other end of the second linkage is rotatably connected to the third linkage, and the third linkage is also fixedly connected to a clamping arm in another clamping structure. The clamping arm corresponding to the connecting shaft of the first linkage and the clamping arm corresponding to the connecting shaft of the third linkage are located diagonally opposite each other.

[0013] Furthermore, a cylindrical clamping wheel is provided at the end of the clamping arm away from the gear; the clamping wheel is rotatably configured with the clamping arm, and the clamping wheel can rotate around its axis, the axis of the clamping wheel being located in the vertical direction and parallel to the axis of the hub.

[0014] Furthermore, it also includes a barrier structure, which is disposed at one end of the transmission structure that is fed into the hub; the barrier structure includes a barrier plate that can be raised and lowered.

[0015] Furthermore, the barrier structure also includes a second cylinder and a barrier frame, with one end of the second cylinder fixedly mounted on the barrier frame and the other end of the second cylinder fixedly connected to the barrier plate.

[0016] Furthermore, a sliding structure with a sliding fit is provided between the barrier plate and the barrier frame.

[0017] The beneficial effects of this utility model are as follows:

[0018] By setting up a clamping and positioning structure, the wheel hub being transported on the transmission structure is clamped, ensuring that the position of the wheel hub is as consistent as possible when the positioning camera and the sampling camera are taking pictures. This makes it easier to process and identify defects in the wheel hub images and improves the accuracy of identification.

[0019] By setting up a gripper mechanism in conjunction with the action mechanism, synchronous control of the gripping arms on both sides of the transmission structure is achieved, so that all the gripping arms move synchronously and clamp the hub as centrally as possible.

[0020] By setting clamping wheels on the clamping arms, a better fit with the wheel hub is achieved;

[0021] By setting up a blocking structure, we can ensure that only one wheel hub is photographed at a time, thus avoiding interference;

[0022] By setting an adjustment structure, the position of the positioning camera is adjusted so that it is positioned as directly above the wheel hub being transported on the transmission structure, and kept facing the wheel hub, thus ensuring a clear image of the front of the wheel hub is obtained. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0024] Figure 2 This is a schematic diagram of the clamping and positioning structure in Example 1;

[0025] Figure 3 This is a schematic diagram of the barrier structure in Example 1;

[0026] Figure 4 This is a schematic diagram of the positioning camera in Example 1;

[0027] Figure 5 This is a schematic diagram showing the connection between the positioning camera and the support frame in Example 1;

[0028] Figure 6 This is an exploded view of the connection between the positioning camera and the support frame in Example 1.

[0029] Explanation of reference numerals in the attached diagram: Sampling camera 1, robotic arm 2, positioning camera 3, camera support frame 31, support frame 32, first connecting plate 33, second connecting plate 34, focusing plate 35, transmission structure 4, clamping and positioning structure 5, clamping arm 51, connecting shaft 52, first cylinder 53, gear 54, first connecting rod 55, second connecting rod 56, third connecting rod 57, clamping wheel 58, barrier structure 6, barrier plate 61, second 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 1-6 As shown, a wheel hub front image acquisition device includes a sampling camera 1 for acquiring wheel hub images; it also includes a robotic arm 2 for controlling the movement of the sampling camera 1, a positioning camera 3 for verifying the wheel hub orientation, a transmission structure 4, and a clamping and positioning structure 5. The positioning camera 3 is positioned directly above the transmission structure 4; the clamping and positioning structure 5 is mounted on the transmission structure 4, corresponding to the position of the positioning camera 3; the robotic arm 2 is positioned on one side of the transmission structure 4, with the sampling camera 1 fixedly mounted at its movable end, corresponding to the clamping and positioning structure 5. When the wheel hub is transmitted to a designated position on the transmission structure 4, the clamping and positioning structure 5 clamps the wheel hub, achieving positioning. This results in higher consistency in the images acquired by the positioning camera 3 and the sampling camera 1 for different wheel hubs, reducing the likelihood of wheel hub positions deviating from the camera's imaging range. This facilitates subsequent image defect identification and other operations, improving the efficiency and accuracy of image recognition.

[0034] The positioning camera 3 is fixedly mounted above the transmission structure 4 via a camera support bracket 31, with the positioning camera 3 facing the front of the wheel hub being transmitted on the transmission structure 4. The positioning camera 3 is used to acquire an image of the front of the wheel hub and, in conjunction with existing image recognition methods, to identify the position of the valve holes in the wheel hub, thereby determining the orientation of the wheel hub and facilitating subsequent defect detection of the wheel hub image. The camera support frame 31 is generally L-shaped. An adjustment structure is provided between the positioning camera 3 and the camera support frame 31. The adjustment structure includes a support frame 32, a first connecting plate 33, and a second connecting plate 34. The support frame 32 is slidably mounted on the camera support frame 31, and its sliding direction is in the horizontal plane. The first connecting plate 33 is slidably mounted on the support frame 32, and its sliding direction is in the horizontal plane and perpendicular to the sliding direction of the support frame 32. The second connecting plate 34 is rotatably mounted on the first connecting plate 33. A rotating shaft for rotatable connection is provided between the second connecting plate 34 and the first connecting plate 33. The second connecting plate 34 is also provided with an arc-shaped hole, and the first connecting plate 33 is provided with a positioning hole corresponding to the arc-shaped hole. A screw is fixed in the positioning hole, which, in conjunction with the arc-shaped hole, fixes the second connecting plate 34 when it is rotated to a certain angle. The positioning camera 3 is also fixedly mounted on the second connecting plate 34. The adjustment structure also includes a focusing plate 35, which is fixedly mounted on the support frame 32. The focusing plate 35 is located below the positioning camera 3, and the focusing plate 35 is also provided with a focusing hole corresponding to the positioning camera 3.

[0035] The clamping and positioning structure 5 includes two gripper mechanisms arranged opposite each other on both sides of the transmission structure 4. Each gripper structure includes two rotatable gripping arms 51. When the two gripping arms 51 approach each other, the gripper structures on both sides retract inward to clamp the hub being transported on the transmission structure 4. One end of the gripping arm 51 is rotatably connected to the support member of the gripping arm 51 via a connecting shaft 52. In this example, the connecting shaft 52 on one side of the transmission structure 4 is rotatably connected to the camera support frame 31, and a bearing drive is provided between the connecting shaft 52 and the camera support frame 31. The connecting shaft 52 on the other side is rotatably connected to the base of the robot arm 2, and a bearing drive is also provided between the connecting shaft 52 and the base of the robot arm 2.

[0036] The clamping and positioning structure 5 also includes an action mechanism, which includes a first cylinder 53, a connecting rod assembly, and a gear 54; wherein the gear 54 is fixedly mounted on the connecting shaft 52; the gears 54 on the two clamping arms 51 in the same clamping structure mesh with each other; the first cylinder 53 is fixedly connected to the connecting shaft 52 on the clamping arm 51 through the connecting rod assembly, and is used to control the rotation of the connecting shaft 52. The linkage assembly includes a first linkage 55, a second linkage 56, and a third linkage 57. The middle part of the first linkage 55 is fixedly connected to the connecting shaft 52 of one of the gripper arms 51 in one set of gripper structures. One end of the first linkage 55 is rotatably connected to the movable end of the first cylinder 53, and the other end of the first linkage 55 is rotatably connected to one end of the second linkage 56. The other end of the second linkage 56 is rotatably connected to the third linkage 57, which is also fixedly connected to one of the gripper arms 51 in another set of gripper structures. The gripper arms 51 corresponding to the connecting shaft 52 connected to the first linkage 55 and the gripper arms 51 corresponding to the connecting shaft 52 connected to the third linkage 57 are located diagonally. In this way, when the first cylinder 53 drives the corresponding connecting shaft 52 to rotate through the first linkage 55, the connecting shafts 52 on the diagonal rotate in the same direction and speed due to the action of the second linkage 56 and the third linkage 57, thereby realizing that the gripper structures on both sides simultaneously tighten inward or open outward, achieving linkage. In some other embodiments, the rotation of the coupling 52 can be controlled by setting other connection relationships, such as the cooperation between the motor and the gear 54.

[0037] A cylindrical clamping wheel 58 is provided at the end of the clamping arm 51 away from the gear 54. The clamping wheel 58 is rotatably mounted with the clamping arm 51 and can rotate around its axis. In this example, the axis of the clamping wheel 58 is located in the vertical direction and is parallel to the axis of the hub. The vertically mounted clamping wheel 58 contacts the edge of the hub, which allows the clamping wheel 58 to fit well with the edge of the hub of various sizes and orientations, enhancing the clamping effect on the hub. Furthermore, since the clamping wheel 58 is rotatable, it can reduce scratches generated when in contact with the hub.

[0038] It also includes a barrier structure 6, which is located at one end of the conveyor structure 4 where the wheel hub is fed in. The barrier structure 6 blocks the wheel hub on the conveyor structure 4, ensuring that only one wheel hub is present at the corresponding positioning camera 3 and sampling camera 1 station, thus avoiding interference. The barrier structure 6 includes a liftable barrier plate 61. The barrier structure 6 also includes a second cylinder 62 and a barrier frame 63. One end of the second 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 with a sliding fit 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 of the barrier frame 63. A slider corresponding to the slide rail is provided on the barrier plate 61, and the slider slides into the slide rail.

[0039] During implementation, a clamping and positioning structure 5 is set up to clamp the wheel hub being transported on the transmission structure 4, ensuring that the positions of the wheel hub are as consistent as possible when the positioning camera 3 and the sampling camera 1 are taking pictures. This facilitates the processing and identification of defects in the wheel hub images and improves the accuracy of identification. A gripper mechanism is set up in conjunction with an action mechanism to achieve synchronous control of the gripping arms 51 on both sides of the transmission structure 4, so that all gripping arms 51 move synchronously and clamp the wheel hub as centrally as possible. A gripping wheel 58 is set up on the gripping arm 51 to better cooperate with the wheel hub. A blocking structure is set up to ensure that only one wheel hub is photographed at a time to avoid interference. An adjustment structure is set up to adjust the position of the positioning camera 3 so that it is positioned as directly above the wheel hub being transported on the transmission structure 4 and facing the wheel hub, ensuring that a clear frontal image of the wheel hub is obtained.

[0040] 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 device for acquiring a frontal image of a wheel hub, comprising a sampling camera (1) for acquiring images of the wheel hub; characterized in that, It also includes a robotic arm (2) for controlling the movement of the sampling camera (1), a positioning camera (3) for verifying the direction of the wheel hub, a transmission structure (4), and a clamping and positioning structure (5); wherein the positioning camera (3) is set directly above the transmission structure (4); the clamping and positioning structure (5) is set on the transmission structure (4), and the position of the clamping and positioning structure (5) corresponds to that of the positioning camera (3); the robotic arm (2) is set on one side of the transmission structure (4), and the sampling camera (1) is fixedly set at the movable end of the robotic arm (2), and the robotic arm (2) is set in correspondence with the clamping and positioning structure (5).

2. The wheel hub front image acquisition device according to claim 1, characterized in that, The positioning camera (3) is fixedly mounted above the transmission structure (4) by a camera support bracket (31), and the positioning camera (3) faces the front of the wheel hub being transmitted on the transmission structure (4).

3. The wheel hub front image acquisition device according to claim 2, characterized in that, An adjustment structure is also provided between the positioning camera (3) and the camera support frame (31); the adjustment structure includes a support frame (32), a first connecting plate (33) and a second connecting plate (34); the support frame (32) is slidably disposed on the camera support frame (31), and its sliding direction is located in the horizontal plane; the first connecting plate (33) is slidably disposed on the support frame (32); the second connecting plate (34) is rotatably disposed on the first connecting plate (33).

4. The wheel hub front image acquisition device according to claim 1, characterized in that, The clamping and positioning structure (5) includes two gripper mechanisms arranged opposite to each other on both sides of the transmission structure (4); each gripper structure includes two rotatable gripper arms (51); one end of the gripper arm (51) is rotatably connected to the support of the gripper arm (51) through a connecting shaft (52).

5. The wheel hub front image acquisition device according to claim 4, characterized in that, The clamping and positioning structure (5) also includes an action mechanism, which includes a first cylinder (53), a connecting rod assembly, and a gear (54); wherein the gear (54) is fixedly mounted on the connecting shaft (52); the gears (54) on the two clamping arms (51) in the same clamping structure mesh with each other; the first cylinder (53) is fixedly connected to the connecting shaft (52) on the clamping arm (51) through the connecting rod assembly, and is used to control the rotation of the connecting shaft (52).

6. The wheel hub front image acquisition device according to claim 5, characterized in that, The linkage assembly includes a first link (55), a second link (56), and a third link (57). The middle part of the first link (55) is fixedly connected to the connecting shaft (52) of one of the clamping arms (51) in one of the clamping structures. One end of the first link (55) is rotatably connected to the movable end of the first cylinder (53), and the other end of the first link (55) is rotatably connected to one end of the second link (56). The other end of the second link (56) is rotatably connected to the third link (57), and the third link (57) is also fixedly connected to one of the clamping arms (51) in another clamping structure. The clamping arms (51) corresponding to the connecting shaft (52) connected to the first link (55) and the clamping arms (51) corresponding to the connecting shaft (52) connected to the third link (57) are in diagonal positions.

7. The wheel hub front image acquisition device according to claim 4, characterized in that, The clamping arm (51) is provided with a cylindrical clamping wheel (58) at the end away from the gear (54); the clamping wheel (58) is rotatably arranged with the clamping arm (51), and the clamping wheel (58) can rotate around its axis. The axis of the clamping wheel (58) is located in the vertical direction and is parallel to the axis of the hub.

8. The wheel hub front image acquisition device according to claim 1, characterized in that, It also includes a barrier structure (6), which is disposed at one end of the transmission structure (4) that is fed into the hub; the barrier structure (6) includes a barrier plate (61) that can be raised and lowered.

9. The wheel hub front image acquisition device according to claim 8, characterized in that, The barrier structure (6) also includes a second cylinder (62) and a barrier frame (63). One end of the second cylinder (62) is fixedly mounted on the barrier frame (63), and the other end of the second cylinder (62) is fixedly connected to the barrier plate (61).

10. The wheel hub front image acquisition device according to claim 9, characterized in that, A sliding structure (64) with sliding fit is also provided between the barrier plate (61) and the barrier frame (63).

Images