Visual inspection apparatus for wiring harnesses

Abstract

The utility model relates to a kind of visual inspection equipment suitable for pencil, including equipment pedestal, workbench is installed on equipment pedestal, main steering adjusting device is installed in one side of workbench, displacement adjusting device is installed in the other side of workbench, vice steering adjusting device is installed on displacement adjusting device, the position of main steering adjusting device, vice steering adjusting device corresponds, constitutes wire clamping area;Lifting support is installed on equipment pedestal, visual inspection device is installed in the upper end of lifting support, display device is also installed on lifting support.It can realize multifunctional adaptive adjustment capability, and can satisfy all-around dead angle visualization detection.

Description

Technical Field

[0001] This utility model relates to a visual inspection device, and more particularly to a visual inspection device suitable for wire harnesses. Background Technology

[0002] In the field of automated testing of automotive wiring harnesses, existing equipment suffers from technical bottlenecks such as poor adaptability, low testing efficiency, and insufficient imaging quality.

[0003] For example, Chinese patent CN221056487U discloses an automotive wiring harness testing device that uses a gripper fixing scheme. Although it can achieve basic positioning, it is difficult to be compatible with different specifications of wiring harnesses due to the lack of a length adaptive adjustment mechanism. At the same time, its single-station design results in low batch testing efficiency.

[0004] Chinese patent CN103105193A discloses a precision machine vision inspection system, which reveals the inherent defects of static inspection—the wire harness cannot rotate axially, resulting in missing side and bottom images, and the lack of a dynamic supplementary lighting module makes the image shadow easily caused by ambient light interference.

[0005] Meanwhile, Chinese patent CN219265247U discloses a novel multi-axis linkage visual inspection device. The multi-station synchronous scheme employed relies on complex motion mechanisms, which carries the risk of wiring harness displacement and air / line interference issues, affecting inspection stability.

[0006] The aforementioned technologies share common drawbacks: First, the fixing mechanism cannot simultaneously address the compatibility issues of wire harness length adaptation (e.g., tensioning of ultra-long / ultra-short wire harnesses) and irregularly shaped connectors (e.g., narrow connectors are prone to detachment); second, static or asynchronous rotation detection modes result in incomplete coverage of the wire harness surface, leading to a high rate of missed detections; third, the lack of reliable anti-torsion mechanisms and standardized lighting environments during multi-station parallel detection results in significant fluctuations in image quality. These drawbacks directly impact defect identification accuracy and production line throughput.

[0007] In view of the above-mentioned shortcomings, the designer has actively researched and innovated in order to create a visual inspection device suitable for wire harnesses, making it more valuable for industrial applications. Utility Model Content

[0008] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a visual inspection device suitable for wire harnesses.

[0009] This utility model discloses a visual inspection device for wire harnesses, comprising a device base, wherein: a worktable is mounted on the device base, a main steering adjustment device is mounted on one side of the worktable, a displacement adjustment device is mounted on the other side of the worktable, and a secondary steering adjustment device is mounted on the displacement adjustment device; the main steering adjustment device and the secondary steering adjustment device are positioned correspondingly to form a wire clamping area; a lifting bracket is mounted on the device base, a visual inspection device is mounted on the upper end of the lifting bracket, and a display device is also mounted on the lifting bracket; a control device is integrated in the device base, and the main steering adjustment device, the displacement adjustment device, the secondary steering adjustment device, the visual inspection device, the display device, and the control device are electrically connected; each of the main steering adjustment device and the secondary steering adjustment device includes several mounting shafts, a rotating shaft is movably connected to the mounting shaft, a wire clamping block is mounted at the front end of the rotating shaft, and a transmission device is connected to the rear end of the rotating shaft.

[0010] Furthermore, in the aforementioned visual inspection device for wire harnesses, a bearing is installed in the mounting bracket, and the rotating shaft passes through the bearing; the wire clamping block includes a block body connected to the rotating shaft screw, and a wire receiving groove is provided on the block body.

[0011] Furthermore, in the aforementioned visual inspection device for wire harnesses, the wire receiving groove is a dovetail groove, and the outer opening of the dovetail groove forms a tightening structure; the wire clamping block is located at the upper end of the wire receiving groove and is connected to a pair of tightening adjustment pieces, the tightening adjustment pieces being L-shaped.

[0012] Furthermore, in the aforementioned visual inspection equipment for wire harnesses, the transmission device includes a transmission wheel connected to a rotating shaft, a transmission belt fitted on the transmission wheel, and a drive motor connected to the transmission belt; a harmonic reducer is installed on the drive motor.

[0013] Furthermore, in the aforementioned visual inspection equipment for wire harnesses, the displacement adjustment device includes a pair of distributed guide rails, a slider movably mounted on the guide rails, a support plate mounted on the slider, a traction block mounted on one side of the support plate, a lead screw motor mounted in the equipment base, and the lead screw motor movably connected to the traction block.

[0014] Furthermore, in the aforementioned visual inspection device for wire harnesses, a light-shielding plate is installed at the upper end of the lifting bracket, and inspection ports are distributed on the light-shielding plate. The viewfinder of the visual inspection device corresponds to the inspection ports, and the wire clamping area is located below the viewfinder. A ring-shaped supplementary light strip is distributed below the light-shielding plate at the edge of the inspection ports.

[0015] Furthermore, in the aforementioned visual inspection equipment for wire harnesses, the visual inspection device is an industrial camera, an adjusting crossbar is installed at the upper end of the lifting bracket, an adjusting mounting block is connected to the adjusting crossbar, and the adjusting mounting block is connected to the industrial camera.

[0016] Furthermore, in the aforementioned visual inspection device for wire harnesses, a human-computer interaction device is installed on the device base, the human-computer interaction device including a touch screen and buttons.

[0017] Furthermore, in the aforementioned visual inspection equipment for wire harnesses, a dustproof box is installed outside the transmission device, and the dustproof box has several clearance openings.

[0018] Furthermore, in the aforementioned visual inspection equipment for wire harnesses, the control device is an industrial computer.

[0019] By means of the above solution, this utility model has at least the following advantages:

[0020] 1. It features multi-functional adaptive adjustment capabilities, dynamically adjusting the spacing of the auxiliary steering adjustment device via a displacement adjustment mechanism to accommodate the tensioning requirements of wire harnesses of different lengths. Combined with replaceable end-retraction adjustment plates and dovetail-groove wire clamping blocks, it is compatible with diverse wire harness connector types. This design significantly improves the equipment's clamping adaptability and testing stability for wire harnesses of different specifications, solving the problem of poor compatibility in traditional equipment.

[0021] 2. It can meet all-round, blind-spot-free visual inspection requirements, adopting a synchronous rotation drive method with main / auxiliary steering devices to make the wire harness rotate around the axis. Combined with an industrial camera on the top of the lifting bracket and a ring-shaped supplementary light strip, along with a light shield to eliminate ambient light interference, it can achieve 360° high-definition image capture of the wire harness surface. This combination ensures that the image is free of shadows and blind spots, providing a high-contrast image foundation for defect identification.

[0022] 3. It enables highly efficient synchronous processing, supporting parallel testing of multiple wire harnesses. Multiple wire clamping blocks and transmission devices are integrated through the mounting bracket. Combined with the guide rail-screw motor system of the displacement adjustment device, wire harness tensioning and positioning are quickly completed. This meets the high-efficiency quality inspection requirements for batch wire harnesses.

[0023] 4. It enables intelligent human-machine collaborative control, integrating industrial control computer devices to uniformly schedule main / auxiliary steering adjustment, displacement adjustment, visual inspection, and display devices; it displays inspection results and anomaly markers in real time through a human-machine interface (touchscreen / buttons), and supports data transmission to external processing equipment. This achieves fully automated closed-loop management of the inspection process.

[0024] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a vision inspection device suitable for wire harnesses.

[0026] Figure 2 This is a structural diagram of the displacement adjustment device. (The worktable, support plate, and other components have been removed to avoid obstruction.)

[0027] Figure 3 This is a schematic diagram of the wire clamp block.

[0028] The meanings of the labels in the figures are as follows.

[0029] 1 Equipment base 2 Workbench

[0030] 3. Main steering adjustment device; 4. Secondary steering adjustment device

[0031] 5 Lifting support 6 Visual inspection device

[0032] 7. Mounting shaft bracket 8. Rotating shaft

[0033] 9. Cable clip 10. Cable slot

[0034] 11. Closure adjustment plate; 12. Drive wheel

[0035] 13 Transmission belt 14 Drive motor

[0036] 15 Guide rail 16 Bearing plate

[0037] 17 Traction block 18 Lead screw motor

[0038] 19. Sunshade 20. Inspection Port

[0039] 21 Adjusting crossbar 22 Adjusting mounting block

[0040] 23 Touchscreens 24 Buttons

[0041] 25 Dustproof box 26 Display device

[0042] 27. Wiring harness Detailed Implementation

[0043] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0044] like Figures 1 to 3 The visual inspection equipment for wire harnesses includes a base 1, which is unique in that: a worktable 2 is mounted on the base 1, and a main steering adjustment device 3 is mounted on one side of the worktable 2. Simultaneously, a displacement adjustment device is mounted on the other side of the worktable 2, and a secondary steering adjustment device 4 is mounted on the displacement adjustment device. The positions of the main steering adjustment device 3 and the secondary steering adjustment device 4 correspond to each other, forming a wire clamping area. Based on the displacement adjustment device, the distance between the secondary steering adjustment device 4 and the main steering adjustment device 3 can be adjusted according to the actual length of the wire harness 27, thus controlling the size of the wire clamping area and improving adaptability to the wire harness 27 during inspection. During implementation, this invention also includes a lifting bracket 5 mounted on the base 1, with a visual inspection device 6 mounted on the upper end of the lifting bracket 5. This allows for observation of the wire clamping area from top to bottom, obtaining a clearer image and providing image data for subsequent visual inspection. Considering that users can manually view the current real-time image or display inspection results, markings, etc., a display device 26 is also mounted on the lifting bracket 5. Considering the need for automated operation of various devices during visual inspection, a control device (not shown in the figure) is integrated into the equipment base 1. The main steering adjustment device 3, displacement adjustment device, auxiliary steering adjustment device 4, visual inspection device 6, and display device 26 are electrically connected to the control device. During real-time operation, both the main steering adjustment device 3 and the auxiliary steering adjustment device 4 include several mounting brackets 7 to meet the needs of simultaneous inspection of multiple sets of wire harnesses 27. A rotating shaft 8 is movably connected to the mounting bracket 7. A wire clamping block 9 is installed at the front end of the rotating shaft 8, and a transmission device is connected to the rear end of the rotating shaft 8. In this way, the front and rear ends of the wire harness 27 are limited and engaged with the corresponding wire clamping blocks 9. With the control of the transmission device, the wire clamping blocks 9 drive the wire harness 27 to rotate, allowing the visual inspection device 6 to acquire the image of the wire harness 27.

[0045] In a preferred embodiment of this invention, to facilitate smooth rotation of the rotating shaft 8, a bearing is installed in the mounting bracket 7, and the rotating shaft 8 passes through the bearing. During assembly, the shaft 8 and the bearing shaft hole can be connected by an interference fit or by a locking mechanism such as a locking screw, which are conventional connection methods and will not be described in detail here. Meanwhile, to fit the connector shapes at both ends of the wire harness 27, the wire clamping block 9 includes a block body that is screwed to the rotating shaft 8, and a wire receiving groove 10 is provided on the block body. In use, the connector of the wire harness 27 can be embedded in the wire receiving groove 10 for positioning. Specifically, the wire receiving groove 10 is a dovetail groove, and the outer opening of the dovetail groove forms a tightening structure. Furthermore, a pair of closing adjustment pieces 11, L-shaped, can be connected to the upper end of the wire clamping block 9 located in the wire receiving groove 10. In this way, for some narrower connectors, the upper end can be limited by the two tapering adjustment pieces 11 distributed at the upper end of the cable tray 10, preventing the connector from accidentally coming out of the cable tray 10 during use. Furthermore, the tapering adjustment pieces 11 are replaceable to adapt to different types of connectors, improving versatility.

[0046] Furthermore, to rotate the wire harness 27 by synchronously rotating both ends axially, a transmission device is used, including a transmission wheel 12 connected to the rotating shaft 8. A transmission belt 13 is fitted onto the transmission wheel 12, and a drive motor 14 is connected to the transmission belt 13. A harmonic reducer can be installed on the drive motor 14 to adapt to different speed requirements. Alternatively, a speed synchronization module can be installed on the drive motor 14, which belongs to the main steering adjustment device 3 and the auxiliary steering adjustment device 4, to achieve synchronous rotation and avoid improper twisting of the wire harness 27. Commercially available compatible models can be used for the speed synchronization module, which will not be elaborated further here.

[0047] In practical implementation, to adapt to different wire harnesses 27 according to their actual lengths and ensure smooth straightening of the wire harnesses 27 during testing, the displacement adjustment device includes paired guide rails 15, with sliders movably mounted on the guide rails 15. Simultaneously, a support plate 16 is mounted on the slider to facilitate the installation of the corresponding secondary steering adjustment device 4. Furthermore, a traction block 17 is mounted on one side of the support plate 16, and a lead screw motor 18 is installed inside the equipment base 1, movably connected to the traction block 17. Thus, driven by the lead screw motor 18, the secondary steering adjustment device 4 is positioned appropriately, effectively tensioning the wire harnesses 27 without affecting subsequent rotation.

[0048] Meanwhile, to ensure clear framing and prevent shadows caused by abnormal light sources, a light-shielding plate 19 is installed on the upper end of the lifting bracket 5. The light-shielding plate 19 has viewing ports 20, with the viewfinder of the visual inspection device 6 corresponding to one of these ports, and the clamping area located below the viewfinder. Furthermore, a ring-shaped supplementary lighting strip (not shown in the figure) is distributed below the light-shielding plate 19 along the edge of the viewing ports 20. This allows for appropriate supplementary lighting as needed, resulting in clear images free from shadows.

[0049] Furthermore, to meet the practical needs of visual inspection, the visual inspection device 6 used is an industrial camera. An adjusting crossbar 21 is installed at the upper end of the lifting bracket 5, and an adjusting mounting block 22 is connected to the adjusting crossbar 21. The adjusting mounting block 22 is connected to the industrial camera. Meanwhile, considering user convenience, a human-machine interface device is installed on the equipment base 1, including a touchscreen 23 and buttons 24. Of course, a keyboard, mouse, etc., can be added according to user habits, which will not be elaborated here.

[0050] During implementation, a dustproof box 25 can be installed outside the transmission device, with several clearance openings provided on the dustproof box 25 to avoid motion interference. Meanwhile, the control device used is an industrial control computer. If local data analysis is performed, a detection and processing module can be pre-installed in the industrial control computer. If data analysis and processing are performed through external devices, multiple data transmission interfaces are matched to facilitate high-speed data transmission.

[0051] Example 1

[0052] The cable tray 10 is a dovetail tray, directly matching the connector of the cable harness 27. It is suitable for long-term testing of corresponding models of cable harness 27 without the need for an adjustment tab 11. It is also suitable for cable harnesses 27 of uniform size, eliminating the need for a displacement adjustment device. An LCD screen is used for the human-machine interface. This simplifies the process.

[0053] Example 2

[0054] The main steering adjustment device 3 and the auxiliary steering adjustment device 4 are positioned correspondingly, with a total of six sets to meet the synchronous detection requirements of the six wire harnesses 27. During this period, the height of the display device 26 is adjusted according to the user's standing or sitting posture. An LED screen can also be used to reduce the size and weight of the display device 26. The closing adjustment piece 11 is selected according to the size of the connector, and is attached to the block body by screws or strong magnetic attraction.

[0055] The working principle of this utility model is as follows:

[0056] The connectors at both ends of the wire harness 27 to be tested are respectively inserted into the corresponding wire slots 10 of the main steering adjustment device 3 and the auxiliary steering adjustment device 4. Then, the displacement adjustment device drives the auxiliary steering adjustment device 4 to move, so that the wire harness 27 is within a reasonable tension range.

[0057] Subsequently, the main steering adjustment device 3 and the auxiliary steering adjustment device 4 rotate synchronously at the same speed. This causes the wiring harness 27 to rotate axially around its central axis. During this process, the vision inspection device 6 acquires an image of the surface of the wiring harness 27, which is then processed by the control device. Alternatively, the image can be transmitted to an external processing device via a corresponding data port.

[0058] Next, the visual inspection results and the current image are displayed on the display device 26. If any abnormality is detected, the abnormal location can also be displayed.

[0059] Furthermore, the directions or positional relationships described in this utility model are based on the directions or positional relationships shown in the accompanying drawings. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or structure referred to must have a specific orientation, or to operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A visual inspection device suitable for wire harnesses, comprising a device base (1), characterized in that: A workbench (2) is installed on the equipment base (1). A main steering adjustment device (3) is installed on one side of the workbench (2), and a displacement adjustment device is installed on the other side of the workbench (2). A secondary steering adjustment device (4) is installed on the displacement adjustment device. The main steering adjustment device (3) and the secondary steering adjustment device (4) are positioned correspondingly to form a clamping area. A lifting bracket (5) is installed on the equipment base (1). A visual inspection device (6) is installed on the upper end of the lifting bracket (5). A visual inspection device (6) is also installed on the lifting bracket (5). Equipped with a display device (26), the equipment base (1) integrates a control device. The main steering adjustment device (3), displacement adjustment device, secondary steering adjustment device (4), visual inspection device (6), display device (26) are electrically connected to the control device. The main steering adjustment device (3) and secondary steering adjustment device (4) each include several mounting brackets (7). A rotating shaft (8) is movably connected to the mounting bracket (7). A wire clamping block (9) is installed at the front end of the rotating shaft (8), and a transmission device is connected to the rear end of the rotating shaft (8).

2. The visual inspection device for wire harnesses according to claim 1, characterized in that: The mounting bracket (7) is equipped with a bearing, and the rotating shaft (8) passes through the bearing; the wire clamping block (9) includes a block body that is screwed to the rotating shaft (8), and the block body is provided with a wire receiving groove (10).

3. The visual inspection device for wire harnesses according to claim 2, characterized in that: The wire receiving groove (10) is a dovetail groove, and the outer opening of the dovetail groove forms a tightening structure; the wire clamping block (9) is located at the upper end of the wire receiving groove (10) and is connected to a pair of tightening adjustment pieces (11), which are L-shaped.

4. The visual inspection device for wire harnesses according to claim 1, characterized in that: The transmission device includes a transmission wheel (12) connected to the rotating shaft (8), a transmission belt (13) is fitted on the transmission wheel (12), and a drive motor (14) is connected to the transmission belt (13); a harmonic reducer is installed on the drive motor (14).

5. The visual inspection device for wire harnesses according to claim 1, characterized in that: The displacement adjustment device includes a pair of guide rails (15), a slider is movably mounted on the guide rails (15), a bearing plate (16) is mounted on the slider, a traction block (17) is mounted on one side of the bearing plate (16), a screw motor (18) is installed in the equipment base (1), and the screw motor (18) is movably connected to the traction block (17).

6. The visual inspection device for wire harnesses according to claim 1, characterized in that: A light shield (19) is installed on the upper end of the lifting bracket (5). A viewing port (20) is distributed on the light shield (19). The viewfinder of the visual inspection device (6) corresponds to the viewing port (20). The clamping area is located below the viewfinder. A ring-shaped fill light strip is distributed below the light shield (19) at the edge of the viewing port (20).

7. The visual inspection device for wire harnesses according to claim 1, characterized in that: The visual inspection device (6) is an industrial camera. An adjusting crossbar (21) is installed on the upper end of the lifting bracket (5). An adjusting mounting block (22) is connected to the adjusting crossbar (21). The adjusting mounting block (22) is connected to the industrial camera.

8. The visual inspection device for wire harnesses according to claim 1, characterized in that: A human-computer interaction device is installed on the device base (1), which includes a touch screen (23) and buttons (24).

9. The visual inspection device for wire harnesses according to claim 1, characterized in that: The transmission device is equipped with a dustproof box (25), and the dustproof box (25) has several clearance openings.

10. The visual inspection device for wire harnesses according to claim 1, characterized in that: The control device is an industrial computer.

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