Motorcycle support size detection feeding and conveying device

Abstract

The application relates to a feeding and conveying device for motorcycle support size detection, and belongs to the technical field of conveying and detection of motorcycle parts. The feeding and conveying device for motorcycle support size detection is characterized in that the device comprises a chain conveyor and a supporting part, at least two groups of detection parts are arranged at the upper end of the chain conveyor, and the supporting part is used for supporting the high part of the double-supporting bottom foot of the main support when the main support is inclined. The height difference between the supporting groove on the supporting part and the supporting arm is used to expose the double-supporting bottom foot and the rear supporting foot welding surface originally adhering to the ground in the upper and side field of view, complete point cloud data and contour features can be obtained, the long-existing problem of the optical detection blind area is solved, the supporting part drives the main support to passively rotate around the reinforced pipe shaft center during the turnover and discharging process, the detection part located at the position can perform secondary shooting on the workpiece in the rotating state, and multi-dimensional comparison can be performed on the upstream static detection data.

Description

Technical Field

[0001] This invention relates to the field of automotive and motorcycle parts inspection and conveying technology, and in particular to a feeding and conveying device for inspecting the dimensions of motorcycle brackets. Background Technology

[0002] The motorcycle main frame is a key safety component that supports the weight of the entire vehicle, referring to... Figure 1 Typically, the main support is formed by welding two support tubes and a hinge shaft into a U-shaped structure. The welding area of ​​the double support feet and rear parking feet at the bottom of the support tubes is a typical multi-directional spatial welding structure with dense weld points and a large heat input. After welding, this area is prone to welding deformation and stress concentration, which can cause the double support feet to not be on the same plane or the symmetry of the opening to exceed the tolerance, seriously affecting the parking stability and safety of the vehicle. Therefore, before the main support is assembled on the line, its outline dimensions, flatness and symmetry must be strictly inspected. For the dimensional inspection of such complex welded parts, the industry generally adopts an offline inspection mode based on special fixtures or contour tooling. During operation, it is necessary to manually pick up and place the workpiece from the material box to the inspection station, and complete the positioning of the hinge pin, comparison of the opening plate, and measurement of the flatness of the bottom foot by feeler gauge in sequence. This method not only has a long inspection cycle per piece and high labor intensity, but also highly depends on the skill and sense of responsibility of the operator. It is very easy to miss or misjudge due to visual fatigue, which is difficult to meet the needs of automated production with high-speed flow in modern workshops. With the development of machine vision technology, some technologies have attempted to introduce line scanning cameras, laser profilometers, or other optical dimension inspection instruments for online optical inspection. However, due to the special structure of the motorcycle main frame, conventional conveying methods usually place it flat on a flat conveyor belt or roller conveyor. This placement method results in the welding surfaces of the double support feet and rear foot, which support the weight of the entire vehicle, being in close contact with the surface of the conveyor belt, forming a natural blind spot for inspection. Conventional optical equipment cannot obtain complete point cloud data and contour features of this contact area, making it impossible to effectively identify core defects such as uneven ground contact and local warping caused by welding thermal deformation. Summary of the Invention

[0003] Therefore, it is necessary to provide a feeding and conveying device for detecting the size of motorcycle brackets to address the aforementioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A feeding and conveying device for detecting the size of a motorcycle bracket, characterized in that it includes a chain conveyor and a support part installed on the chain conveyor, wherein at least two sets of detection parts are provided at the upper end of the chain conveyor; wherein the support part is used to position the double support feet of the main bracket at the higher position when the main bracket is tilted.

[0005] Preferably, the support includes a support plate, a support frame mounted on the support plate, a support groove disposed on the support frame, and a support arm disposed on the side of the support frame. The support groove is used to support the reinforcing tube, and the support arm is used to support the hinge shaft end of the main bracket. The height of the support arm is lower than that of the support groove.

[0006] Optionally, the upper surface of the support arm is provided with a comparison line.

[0007] Furthermore, it also includes a conveyor belt for transporting the main support after inspection, the surface of which is provided with protrusions, the width of which is less than the distance between the two support tubes.

[0008] Furthermore, the support groove is V-shaped and has an outlet surface and an anti-detachment surface. The anti-detachment surface is inclined to press down the reinforcing tube during the transport of the main support.

[0009] Furthermore, the detection unit is provided in at least two sets, one of which is located above the unloading end of the chain conveyor.

[0010] Furthermore, the support frame is provided with a fixed arm, and a rotating arm is rotatably connected to the fixed arm.

[0011] Furthermore, the rotating end of the rotating arm has a counterweight structure to press the hinge shaft.

[0012] Furthermore, the rotational connection point between the rotating arm and the fixed arm is located at the middle position between the hinge shaft and the reinforcing tube.

[0013] Furthermore, the chain conveyor is equipped with a rotating conveyor chain, and a connecting plate is installed on the conveyor chain. The two ends of the support plate are installed on the connecting plate by bolts.

[0014] Compared with the prior art, the present invention provides a feeding and conveying device for detecting the size of motorcycle brackets, which has the following advantages: This invention creates a height difference between the support groove and the support arm on the support part, adjusting the main support from the traditional flat position to an inclined position. This exposes the welding surfaces of the double support feet and the rear foot, which were originally touching the ground, to the upper and side views. Combined with the three sets of optical instruments arranged on the inverted U-shaped frame at the top, lower right and lower left, it achieves 360° coverage of the key welding area without blind spots, and can acquire complete point cloud data and contour features, solving the long-standing problem of optical detection blind spots. This invention utilizes the arc-shaped track design at the unloading end of the chain conveyor, which causes the support part to passively rotate around the axis of the reinforcing tube during the flipping unloading process. The detection part located at this position can take a second picture of the workpiece in the rotating state and compare it with the upstream static detection data in multiple dimensions. This dual detection mode effectively overcomes the misjudgment that may be caused by a single perspective and greatly improves the ability to identify hidden defects such as symmetry and torsion deformation. This invention achieves automatic gripping and sliding transition of workpieces between conveyor lines by designing Y-shaped anti-detachment and guide surfaces on the support groove and combining them with the protruding structure on the conveyor belt of the next process. It utilizes the thrust of the front and rear support parts and the tension of the conveyor belt to realize the automation of the process from material loading to unloading. The present invention sets a comparison line on the support arm, which allows the operator to intuitively make a height prediction when placing the workpiece, reducing the computational burden on the back-end image processing system, and also providing a convenient physical reference for the debugging and maintenance of the equipment. Attached Figure Description

[0015] Figure 1 This is a structural diagram of an existing motorcycle main frame; Figure 2 This is a top view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is a schematic diagram of the detection unit of the present invention; Figure 5 This is the front view of the present invention; Figure 6 This is an isometric view of the present invention; Figure 7 This is a schematic diagram of the support portion in this invention; Figure 8 This is a schematic diagram of the structure in which two sets of support parts are used in conjunction in this invention; Figure 9 This is a schematic diagram of the support groove in this invention; Figure 10 This is a schematic diagram of the protrusion structure in this invention.

[0016] In the diagram: 1. Support tube; 101. Hinge shaft; 102. Reinforcing tube; 103. Rear foot; 104. Double support foot; 2. Chain conveyor; 201. Conveyor chain; 3. Inspection unit; 4. Support plate; 401. Connecting plate; 402. Support frame; 403. Support groove; 404. Outlet surface; 405. Anti-detachment surface; 406. Straightening surface; 5. Fixed arm; 501. Rotating arm; 502. Support arm; 6. Conveyor belt; 601. Protrusion. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] Example 1: A feeding and conveying device for detecting the size of a motorcycle bracket, as shown in the reference. Figure 1 The main frame of the motorcycle, as a key safety component supporting the entire vehicle, is mainly composed of two support tubes 1 welded to a hinge shaft 101 to form a U-shaped structure. The hinge shaft 101 is used to connect the frame. The bottom end of the support tube 1 is equipped with double support feet 104 and a rear foot 103 for improving support strength. Since the support foot part is a multi-directional spatial welding structure, it not only includes the corner joint between the foot and the support tube 1, but also involves the cross welding of the rear foot 103. The weld points are dense and the heat input is large, which can easily cause welding deformation and stress concentration. This can cause the contact surface of the double support feet 104 to be not on the same plane or the symmetry to exceed the tolerance, which seriously affects the parking stability. Therefore, in the material feeding and inspection process, the contour dimensions, flatness and opening symmetry of this part must be carefully inspected to ensure the parking safety and assembly interchangeability of the entire vehicle. Currently, the industry generally uses an offline inspection mode based on special fixtures or contour jigs for dimensional inspection of motorcycle main frames, especially the complex welded areas of the support legs. During the operation, the workpiece must be manually picked up and placed from the production line or material box onto the inspection fixture, and the positioning of the hinge shaft 101 pin, the comparison of the support tube 1 opening plate, and the flatness measurement of the double support foot 104 with a feeler gauge must be completed in sequence. The whole process relies on frequent manual loading and unloading and visual interpretation. Not only is the inspection cycle of a single piece long and the labor intensity high, but it is also very easy to miss or misjudge due to operator fatigue. It is difficult to adapt to the high-speed automated operation of the workshop. The material loading environment is optimized; however, when attempting to introduce optical inspection solutions, since the main support is usually placed directly on the flat conveyor belt or roller conveyor, the welding surfaces of the double support feet 104 and the rear foot 103 used to support the weight of the entire vehicle are in close contact with the flat conveyor belt, forming a natural blind spot for inspection. Conventional line scanning cameras or laser profilometers cannot obtain complete point cloud data and contour features of this critical area, resulting in the inability to effectively identify core defects such as uneven ground contact, local warping, and symmetry deviation caused by welding heat deformation of the support feet, which seriously restricts the integrity and reliability of the inspection results.

[0019] Therefore, refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6This invention includes a chain conveyor 2 and a support unit mounted on the chain conveyor 2. At least two sets of detection units 3 are provided at the upper end of the chain conveyor 2. Each detection unit 3 includes an inverted U-shaped frame covering the chain conveyor 2, and optical instruments for detection are provided above and on both sides of the main support. The support unit is used to tilt the main support, wherein the double-supported base 104 of the main support is located at the higher position in the tilted state. During material loading, the operator places the main support on the support unit, and the chain conveyor 2 transports the main support to the detection unit 3. (Refer to...) Figure 5 The three sets of optical instruments in the detection unit 3 take pictures and perform optical recognition of the main support from the top, lower right and lower left. The detection range is larger and there are no blind spots. It can obtain complete point cloud data and contour features of key areas. In one specific implementation, refer to Figure 7 , Figure 8 The support part includes a support plate 4, a support frame 402 mounted on the support plate 4, a support groove 403 provided on the support frame 402, and a support arm 502 provided on the side of the support frame 402. The support groove 403 is used to support the reinforcing tube 102, and the support arm 502 is used to support the hinge shaft 101 part of the main support. Along the conveying direction of the chain conveyor 2, the support groove 403 and support arm 502 on two adjacent support parts are used in cooperation. Specifically, after the operator places the reinforcing tube 102 of the main support into the support groove 403, refer to... Figure 8 , Figure 9 The main support is rotated around the axis of the reinforcing tube 102 so that the end of the hinge shaft 101 is attached to the support arm 502. The height of the support arm 502 is lower than that of the support groove 403, so that the double support base 104 of the main support is tilted upward. The detection range of the optical instrument is larger and there are no blind spots. It can acquire complete point cloud data and contour features of key areas. In one specific embodiment, since the spacing between two adjacent support parts is fixed, the distance between the support groove 403 and the support arm 502 is relatively fixed after the main support is placed. At this time, by judging the position of the main support hinge 101 side on the support arm 502, it is possible to judge whether the height of the main support is qualified. Specifically, a scale line or a conspicuous qualified line can be set on the support arm 502 to facilitate the subsequent optical instrument to photograph the location, thereby facilitating the judgment of the subsequent optical instrument size detection. In one specific implementation, refer to Figure 6When the support part moves along the chain conveyor 2 to the unloading end, the main support needs to be removed and enter the conveyor belt 6 of the next process. At this time, the support part that enters the unloading end first rotates as it moves down along the arc of the unloading end. At this time, the support arm 502 will rotate upward to support the main support. The support part that has not entered the unloading end has a driving force on the main support, pushing the main support onto the conveyor belt 6 of the next process. In this process, no manual removal is required, and the degree of automation is high. Among them, reference Figure 9 The support groove 403 is V-shaped and has an outlet surface 404 and an anti-detachment surface 405. The anti-detachment surface 405 is tilted to the left to press down the reinforcing tube 102. The anti-detachment surface 405 is used to hold the reinforcing tube 102, so that the reinforcing tube 102 moves with the drive of the support groove 403. The outlet surface 404 gradually tilts to the left after the rear support moves to the end face and rotates to facilitate the outlet of the reinforcing tube 102. At this time, the previous support has placed the reinforcing tube 102 of the main support on the conveyor belt 6 of the next process. Under the frictional pull of the conveyor belt 6 of the next process, the reinforcing tube 102 can slide out from the outlet surface 404. In one specific implementation, refer to Figure 7 , Figure 8 An inclined straightening face 406 is provided on the upper side of the support frame 402, such that the length of the upper support frame 402 between the two straightening faces 406 is less than the length of the lower straightening face 406 between the two straightening faces 406. When the operator places the reinforcing tube 102 of the main support into the support groove 403, the upper part of the straightening face 406 is used to guide the two support tubes 1, and the lower part of the straightening face 406 is used to complete the correction, so that the posture of each main support placed in the support groove 403 is consistent, thereby improving the accuracy of subsequent optical recognition. In one specific implementation, refer to Figure 10 A protrusion 601 is provided on the surface of the next process conveyor belt 6. The width of the protrusion 601 is smaller than the distance between the two support tubes 1. The protrusion 601 can better pull the hinge shaft 101 end of the main support to move, preventing the main support from falling between the conveyor belt 6 and the chain conveyor 2. In one specific embodiment, one set of detection units 3 is located in the direction of the unloading end. When the support unit moves to the unloading end of the chain conveyor 2 and rotates, the distance between the two support units decreases due to the rotation. The main support will rotate around the reinforcing tube 102 at this time. At this time, the detection unit 3 can take pictures of the main support in the rotating state for optical detection. The imaging result of this detection can be compared and analyzed with the imaging result of the previous detection to improve the accuracy of the detection result. The unqualified main support is marked and removed on the next conveyor belt 6 by a mechanical gripper. In one specific implementation, refer to Figure 7 , Figure 8 , Figure 9A fixed arm 5 is provided on the support frame 402, and a rotating arm 501 is rotatably mounted on the fixed arm 5. The rotating end of the rotating arm 501 has a counterweight structure, which is used to press on the hinge shaft 101 so that the main support at this end is closely attached to the support arm 502, reducing the shaking during the conveying of the main support and improving the accuracy of subsequent optical instrument detection. The rotating connection point between the rotating arm 501 and the fixed arm 5 is located in the middle position between the hinge shaft 101 and the reinforcing tube 102. When the support moves to the unloading end of the chain conveyor 2 and rotates, it assists in pressing down the main support and locking it on the protrusion 601. When the support is located below the chain conveyor 2, the rotating arm 501 swings vertically downward under its own weight. When the support moves to the loading end, it gradually overlaps on the guide surface 404 side of the support frame 402 under its own weight, making it convenient for the operator to place the new main support to be tested and press the rotating arm 501 back onto the hinge shaft 101. In one specific implementation, refer to Figure 7 The chain conveyor 2 is equipped with a rotating conveying chain 201, and a connecting plate 401 is installed on the conveying chain 201. The two ends of the support plate 4 are installed on the connecting plate 401 by bolts. In a specific workflow, the operator picks up and places the welded motorcycle main frame onto the feeding end of the chain conveyor 2. First, the reinforcing tube 102 of the main frame is placed into the Y-shaped support groove 403 on the support frame 402. The anti-detachment surface 405 of the support groove 403 is used to restrict the axial movement of the reinforcing tube 102. Then, the operator manually rotates the main frame around the axis of the reinforcing tube 102 so that the hinge shaft 101 overlaps the lower support arm 502. At this time, due to the height difference between the support arm 502 and the support groove 403, the main frame is tilted. The welding surfaces of the originally downward-facing double support feet 104 and rear foot 103 are raised and exposed to the view from above and the side. As the hinge shaft 101 is in place, the free end of the rotating arm 501, which is mounted on the fixed arm 5, is pressed tightly against the upper part of the hinge shaft 101 by the operator's swing. At this time, the main support is firmly clamped between the rotating arm 501 and the support arm 502, which effectively reduces the vibration and shaking during the subsequent conveying process and ensures the stability of the detection benchmark. At the same time, by observing whether the position of the hinge shaft 101 overlapping on the support arm 502 is aligned with the preset qualified line, a preliminary quick screening of the height dimension of the main support can be completed. When the chain conveyor 2 is started, the conveyor chain 201 drives the support plate 4 and the main support to move forward along the track through the connecting plate 401. When the main support passes the first detection section 3, the three sets of optical instruments on the inverted U-shaped frame simultaneously take pictures and scan from the top, lower right and lower left sides of the main support. Since the main support is tilted, the optical instruments can obtain the complete point cloud data of the double support foot 104 touching the ground and the weld of the rear foot 103 without obstruction, so as to accurately calculate the flatness, contour and opening symmetry parameters. The main support continues to move with the support unit to the unloading end of the chain conveyor 2. Here, the track is designed in an arc shape. When the support unit enters this area, it flips along the arc trajectory. During this process, the distance between two adjacent support units is shortened due to the track constraint, forcing the main support to passively rotate around the axis of the reinforcing tube 102. The second set of detection units 3 located here takes a second picture of the main support in the dynamic rotation state. The system compares and analyzes the dynamic imaging data with the static data to further verify the symmetry and dimensional consistency of the main support under different perspectives, which greatly improves the reliability of the detection results. As the support continues to rotate, the reinforcing tube 102 of the main support first contacts the surface of the next process conveyor belt 6. As the chain conveyor 2 continues to operate, the outlet surface 404 of the support groove 403 gradually becomes horizontal. At this time, the support that has not yet entered the rotation area still applies a forward thrust to the main support, while the protrusion 601 on the next process conveyor belt 6 gets stuck between the two support tubes 1 of the main support, pulling the hinge shaft 101 to move forward. Under the combined action of the thrust and the pull, the reinforcing tube 102 slides smoothly out along the outlet surface 404 of the support groove 403, and the main support is completely transferred to the next process conveyor belt 6. The defective main support is marked on the next process conveyor belt 6. When the defective product moves to the set station with the conveyor belt 6, the mechanical gripper grabs it and moves it into the waste box. At the same time, the support part that has completed the unloading task rotates with the conveyor chain 201 to the bottom of the chain conveyor 2 and the feeding end. The rotating arm 501 automatically straightens under the action of gravity and waits for the next feeding cycle, thereby realizing continuous automated operation.

Claims

1. A feeding and conveying device for detecting the size of a motorcycle bracket, characterized in that, It includes a chain conveyor (2) and a support part installed on the chain conveyor (2), and at least two sets of detection parts (3) are provided at the upper end of the chain conveyor (2). The support portion is used to position the double-braced base (104) of the main support at the higher position when the main support is tilted. The support includes a support plate (4), a support frame (402) mounted on the support plate (4), a support groove (403) provided on the support frame (402), and a support arm (502) provided on the side of the support frame (402). The support groove (403) is used to support the reinforcing tube (102) of the main support, and the support arm (502) is used to support the hinge shaft (101) end of the main support. The height of the support arm (502) is lower than that of the support groove (403). The support groove (403) is V-shaped and has an outlet surface (404) and an anti-detachment surface (405). The anti-detachment surface (405) is inclined to press down the reinforcing tube (102) of the main support during the conveying of the main support. One of the detection units (3) is located above the feeding end of the chain conveyor (2); A fixed arm (5) is provided on the support frame (402), and a rotating arm (501) is rotatably connected to the fixed arm (5). The rotating end of the rotating arm (501) has a counterweight structure to press the hinge (101) of the main support. It also includes a conveyor belt (6) for transporting the main support after inspection, the surface of which is provided with protrusions (601), the width of which is less than the distance between the two support tubes (1) of the main support.

2. The feeding and conveying device for detecting the size of a motorcycle bracket according to claim 1, characterized in that, The upper surface of the support arm (502) is provided with a comparison line.

3. The feeding and conveying device for detecting the size of a motorcycle bracket according to claim 1, characterized in that, The rotational connection point between the rotating arm (501) and the fixed arm (5) is located in the middle between the hinge shaft (101) and the reinforcing tube (102).

4. The feeding and conveying device for detecting the size of a motorcycle bracket according to claim 1, characterized in that, The chain conveyor (2) is provided with a rotating conveying chain (201), and a connecting plate (401) is installed on the conveying chain (201). The two ends of the support plate (4) are installed on the connecting plate (401) by bolts.

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