A quality testing device and method for door sill beams in new energy vehicles

Abstract

This invention discloses a quality inspection device and method for door sill beams in new energy vehicles, belonging to the field of automotive parts manufacturing. The device includes a vision inspection mechanism and a conveyor line. The vision inspection mechanism contains a clamping and flipping mechanism. This mechanism includes two symmetrically arranged rotating seats and a servo motor driving the rotating seats. Each rotating seat has two sets of clamping components, with the clamping directions of the two sets of components perpendicular to each other. This allows the two sets of clamping components to clamp different sidewalls of the door sill beam. By alternately clamping the door sill beam with the two sets of clamping components, the inspected surface is unobstructed by any clamping components. The rotating seats drive the door sill beam to rotate, achieving full-surface inspection of the door sill beam. Furthermore, since the door sill beam can undergo secondary inspection within the same vision inspection machine, the movement and clamping time of the door sill beam between different processes and inspection equipment is reduced, effectively ensuring overall inspection efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing, and in particular to a quality inspection device and method for door sill beams in new energy vehicles. Background Technology

[0002] When a car is involved in a side collision, the side sill beam can effectively prevent the door from deforming, thereby enhancing the side protection performance. In new energy vehicles, side impacts can easily damage the battery directly, and the strength of the side sill beam plays a key role in protecting the battery. Therefore, the performance of the sill beam is an important guarantee for the safe driving of new energy vehicles.

[0003] In current door sill beam production, CCD inspection equipment is typically used to inspect the surface quality and left and right components of the door sill beam to ensure product qualification and suitability for installation in new energy vehicles. However, due to the weight of the door sill beam, current inspection processes often incorporate automated conveying devices to transport the door sill beam and clamping mechanisms to hold it, thereby achieving automated inspection.

[0004] However, when the clamping mechanism of the existing testing equipment clamps the sill beam, it inevitably obstructs the surface of the sill beam. For the sill beam, its end face and the mounting holes, rivet nuts, positioning pin holes and other key features for quality inspection are the mounting holes, rivet nuts and positioning pin holes. Any obstruction will cause blind spots in the inspection of the sill beam, making it impossible to achieve 100% full surface coverage inspection.

[0005] To ensure thorough inspection, secondary inspection of the areas of the sill beam obscured by the clamping mechanism is required, either manually or with additional inspection equipment, to achieve full-surface inspection. However, performing a separate secondary inspection not only increases the movement time of the sill beam components between different processes and inspection equipment but also increases the conveying and clamping time during inspection, leading to an increase in overall inspection time and a decrease in overall inspection efficiency. Summary of the Invention

[0006] This invention provides a quality inspection device and method for door sill beams of new energy vehicles, which can solve the problems in the prior art where the clamping mechanism obstructs the surface of the door sill beam, resulting in the inability to fully cover the surface during inspection, as well as the problem of reducing the overall inspection efficiency due to separate secondary inspections.

[0007] A quality inspection device for door sill beams of new energy vehicles includes: a visual inspection mechanism and a conveyor line. The visual inspection mechanism is equipped with a clamping and flipping mechanism. The clamping and flipping mechanism includes two symmetrically arranged rotating seats and a servo motor that drives the rotating seats to rotate. The rotating seats are equipped with two sets of clamping components, and the clamping directions of the two sets of clamping components are perpendicular to each other, so that the two sets of clamping components clamp different side walls of the door sill beam respectively. By alternately clamping the door sill beam with the two sets of clamping components, the surface to be inspected is not obstructed by the clamping components. The rotating seats drive the door sill beam to rotate, thereby realizing full surface inspection of the door sill beam. As a preferred embodiment of the present invention, the clamping and flipping mechanism includes two frame side plates, two rotating seats are rotatably connected to opposite sides of the two frame side plates, and a servo motor is connected to one side of one of the frame side plates and rotatably connected to the drive rotating seat.

[0008] As a preferred embodiment of the present invention, the two frame side plates are rotatably connected to a drive shaft, one end of which is rotatably connected to a servo motor and the other end is rotatably connected to another rotating seat, so as to realize the two rotating seats rotating synchronously through the drive shaft.

[0009] As a preferred embodiment of the present invention, each set of clamping components includes two oppositely arranged sliding seats, and the sliding seats are slidably connected to the rotating seat; the sliding seats are connected to clamping arms, which are used to drive the two sliding seats to move towards each other through the driving component, and to clamp the sill beam by means of the clamping arms.

[0010] In a preferred embodiment of the present invention, the driving assembly includes a first lead screw, a second lead screw, and a driving motor. The first and second lead screws are arranged perpendicularly to each other and are rotatably connected to the rotating seat. The sliding seat is connected to a nut sleeve, and in one set of clamping assemblies, two sliding seats are respectively engaged with the first lead screw through the nut sleeve, and in another set of clamping assemblies, two sliding seats are respectively engaged with the second lead screw through the nut sleeve. The driving motor drives the first and second lead screws to rotate, thereby driving the two sliding seats in each set of clamping assemblies to move synchronously in opposite directions.

[0011] In a preferred embodiment of the present invention, the first lead screw is a bidirectional lead screw, the second lead screw is divided into lead screw A and lead screw B, and driven wheels are fixedly connected to both ends of the first lead screw and one end of lead screw A and lead screw B; the rotating seat is rotatably connected to a transition wheel, and a transmission wheel that meshes with the transition wheel is fixedly connected to one end of lead screw A and lead screw B, so that lead screw A and lead screw B rotate synchronously, and the first lead screw, lead screw A and lead screw B are all located in the same plane; the drive motor is fixedly connected to the side plate of the frame, and a drive wheel is fixedly connected to the output end of the drive motor; during the rotation of the rotating seat, when the first lead screw, lead screw A or lead screw B is axially parallel to the drive wheel, the connected driven wheel meshes with the drive wheel.

[0012] As a preferred embodiment of the present invention, the rotating seat is fixedly connected to a rack corresponding to the sliding seat; the clamping arm is fixedly connected to a rotating shaft, the clamping arm is rotatably connected to the sliding seat via the rotating shaft, and a worm gear is fixedly connected to one end of the rotating shaft; the sliding seat is rotatably connected to a rotating shaft, and a worm gear cooperating with the worm gear is fixedly connected to one end of the rotating shaft, and a traveling wheel meshing with the rack is fixedly connected to the other end. When the sliding seat moves toward the sill beam, the traveling wheel rolls along the rack, and through the worm gear and worm wheel transmission, the clamping arm rotates to a state parallel to the sill beam, thereby clamping the sill beam. When the sliding seat moves away from the sill beam, the clamping arm rotates to a vertical state.

[0013] As a preferred embodiment of the present invention, when the clamping arm rotates to a state parallel to the sill beam, the traveling wheel separates from the rack and continues to move through the sliding seat, and the clamping arm clamps the sill beam.

[0014] As a preferred embodiment of the present invention, the nut sleeve and the sliding seat are connected by a sliding key, and both ends of the nut sleeve have limiting flanges. The nut sleeve is fitted with a compression spring, which abuts against the limiting flange at the end of the nut sleeve facing away from the clamping direction. The nut sleeve pushes the sliding seat to move through the compression spring. When the clamping arm clamps the sill beam, the nut sleeve squeezes the compression spring, so that the compression spring is in a compressed state.

[0015] The testing method for the new energy vehicle door sill beam quality testing equipment, applied to the aforementioned new energy vehicle door sill beam quality testing equipment, includes the following steps: Step 1: First clamping. The sill beam is transported to the visual inspection mechanism via the conveyor line and clamped by one of the clamping components. Step 2: Initial inspection. The sill beam is rotated by a rotating seat, and the unclamped surface of the sill beam is inspected using a vision inspection mechanism. Step 3: Alternate clamping. Use another set of clamping components to clamp the sill beam, and then release the clamping components from the previous clamping state to achieve alternating clamping and staggered clamping positions. Step 4: Secondary inspection. The sill beam is rotated by the rotating seat, and the remaining surface of the sill beam after the first inspection is inspected by the vision inspection mechanism to complete the full surface inspection. Step 5: Release the clamping components from the sill beam during the secondary clamping process to allow the sill beam to be unloaded.

[0016] The present invention has the following beneficial effects: 1. This invention sets up two sets of clamping components, which clamp different side walls of the sill beam respectively. The sill beam is clamped alternately by the two sets of clamping components, so that the surface to be detected is not obstructed by the clamping components. The sill beam is rotated by the rotating seat, thereby realizing full surface detection of the sill beam.

[0017] 2. This invention uses two sets of clamping components to alternately clamp the sill beam and drives the sill beam to rotate through the rotating seat, so that the sill beam can be inspected twice inside the same vision inspection machine. This reduces the time for moving and clamping the sill beam between different processes and inspection equipment, thereby effectively ensuring the overall inspection efficiency.

[0018] 3. By setting the first lead screw as a bidirectional lead screw and the second lead screw as lead screw A and lead screw B, with lead screw A and lead screw B rotating synchronously, the first lead screw, lead screw A, and lead screw B are all located in the same plane. Thus, by utilizing the rotation of the rotating base, the first lead screw, lead screw A, and lead screw B can be driven by the same drive motor respectively, thereby reducing the number of drive components. Furthermore, the drive motor is in a fixed position and does not need to rotate with the rotating base, which reduces the overall production and assembly difficulty and thus helps to reduce the overall production cost. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a quality inspection device for door sill beams of new energy vehicles provided by the present invention; Figure 2 This is a schematic diagram of the clamping and flipping mechanism; Figure 3 for Figure 2 A structural diagram from a rear-view perspective; Figure 4 for Figure 2 The front view; Figure 5 for Figure 2 Enlarged view of the structure of section A in the middle; Figure 6 for Figure 3 Enlarged view of the structure of section B in the middle; Figure 7 This is a cross-sectional view at point CC in section 4; Figure 8 This is a schematic diagram of the structure for inspecting different surfaces of the sill beam after alternating clamping. Figure 9 This is a schematic diagram of the structure of the rotary seat and the sliding seat; Figure 10 Exploded view of the rotary seat and sliding seat structure; Figure 11 This is a schematic diagram of the sliding seat structure; Figure 12 for Figure 11 A structural diagram from a rear-view perspective. Explanation of reference numerals in the attached figures: 1-Clamping and flipping mechanism, 2-Rotating seat, 3-Sliding seat, 4-First lead screw, 5-Drive motor, 6-Vision inspection mechanism, 7-Sill beam, 101-Servo motor, 102-Frame side plate, 103-Drive shaft, 201-Transition wheel, 202-Rack, 301-Clamping arm, 302-Rotating shaft, 303-Worm gear, 304-Rotating shaft, 305-Worm, 306-Traveling wheel, 307-Lead screw sleeve, 308-Limiting flange, 309-Compression spring, 401-Lead screw A, 402-Lead screw B, 403-Driven wheel, 404-Drive wheel, 501-Driving wheel. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figure 1 As shown in the figure, an embodiment of the present invention provides a quality inspection device for door sill beams of new energy vehicles, including a vision inspection mechanism 6 and a conveyor line. The vision inspection mechanism 6 is internally equipped with a clamping and flipping mechanism 1. Specifically, the vision inspection mechanism 6 can use an existing CCD industrial camera and light source system to acquire and judge images of surface defects, mounting hole position accuracy, and riveting nut status of the door sill beam 7. Its specific configuration is not the focus of this invention and is not limited here. The conveyor line is used to automatically transport the door sill beam 7 to be tested to the inspection station and remove the workpiece after inspection, which is a conventional automated conveying method.

[0022] Since the sill beam 7 has multiple outer surfaces, in order to achieve full surface coverage inspection of the sill beam 7, it is necessary to rotate the sill beam 7 so that the different surfaces can be sequentially aligned with the CCD industrial camera and light source system, thereby enabling sequential inspection of the multiple outer surfaces of the sill beam 7.

[0023] like Figures 2-4As shown, therefore, a mechanism that can rotate the sill beam 7 needs to be designed during the inspection process. Specifically, the clamping and flipping mechanism 1 includes two symmetrically arranged rotating seats 2 and a servo motor 101 that drives the rotating seats 2 to rotate. The servo motor 101 drives the rotating seats 2 to rotate, and the sill beam 7 is clamped between the two rotating seats 2. The rotating seats 2 drive the sill beam 7 to rotate, so that each surface of the sill beam 7 can be inspected sequentially.

[0024] In order to meet the installation requirements of the rotating seat 2 and related components, the clamping and flipping mechanism 1 includes two frame side plates 102. The two rotating seats 2 are respectively rotatably connected to the opposite sides of the two frame side plates 102. The servo motor 101 is connected to one side of one of the frame side plates 102 and is rotatably connected to drive the rotating seat 2. The servo motor 101 drives one of the rotating seats 2 to rotate, and the rotation of this rotating seat 2 drives the other rotating seat 2 to rotate through the clamping threshold beam 7.

[0025] Although the above-mentioned scheme has a relatively simple transmission method, in actual use, if the driven rotating seat 2 is obstructed or jammed, if the transmission is carried out through the sill beam 7, the torque borne by the sill beam 7 will inevitably be large. In such cases, the sill beam 7 may be deformed or the clamping part may be damaged, resulting in poor overall reliability.

[0026] To ensure that the sill beam 7 does not bear torque when the rotating seat 2 drives the sill beam 7, it is only necessary for the two rotating seats 2 to rotate synchronously. For this purpose, a drive shaft 103 is rotatably connected between the two frame side plates 102. One end of the drive shaft 103 is linked to the output end of the servo motor 101 through a gear pair or synchronous belt, and the other end is connected to the rotating seat 2 on the other side through the same transmission structure.

[0027] When the servo motor 101 rotates, the power is transmitted through the transmission shaft 103, so that the rotating seats 2 on both sides maintain the same speed and the same phase of rotation, thereby ensuring that the threshold beam 7 clamped between the two can be rotated smoothly, avoiding torsional stress or positional deviation caused by asynchronous rotation on both sides.

[0028] However, as a key structural component for side-impact safety in new energy vehicles, the door sill beam's characteristic areas near its end face, such as mounting holes, rivet nuts, and locating pin holes, are of paramount importance for quality inspection. Traditional grippers or pressure blocks inevitably cover part of the door sill beam's surface area when clamping, causing these obscured parts to become blind spots for inspection, making it impossible to perform full-surface inspection of the door sill beam 7.

[0029] To address the aforementioned problems, the present invention provides two sets of clamping components on each rotating seat 2, with the clamping directions of the two sets of clamping components arranged perpendicular to each other. The purpose of this design is to utilize the two sets of clamping components to clamp different side walls of the sill beam 7 (for example, one set clamps the upper and lower surfaces, and the other set clamps the left and right sides), and to control the two sets of clamping components to perform an "alternating clamping" action.

[0030] When the first set of clamping components clamps the workpiece for the first visual inspection, the parts of the sill beam 7 that are obscured by the first set of clamping components cannot be inspected, but the rest of the surface is exposed to the vision system. After the first inspection, the second set of clamping components clamps the other pair of sidewalls of the sill beam 7, and then the first set of clamping components releases. At this point, the area that was originally obscured by the first set of clamping components is completely exposed. Then, the workpiece is rotated by the rotating seat 2 for a second inspection, which covers the previously missed surfaces. Through this alternating clamping and rotating method, all surfaces of the sill beam 7 can be inspected without blind spots in the same machine, completely eliminating blind spots caused by clamping obstruction. At the same time, it avoids secondary transfer and clamping of the workpiece between different machines, significantly improving inspection efficiency and automation.

[0031] Since the two sets of clamping components need to be able to be alternately clamped, the two sets of clamping components need to be individually controlled, and after the clamping components are released, they should be able to move away from the sill beam 7 as much as possible to reduce interference in the detection range. Therefore, the clamping components can be set to be movable. By moving towards the sill beam 7, the clamping is achieved, and when moving away from the sill beam 7, the clamping on the sill beam 7 is released, and the clamping components can also move away from the sill beam 7.

[0032] Therefore, such as Figure 7 , Figures 9-11 As shown, each clamping assembly includes two opposing sliding seats 3, and the sliding seats 3 and the rotating seat 2 are slidably connected via a guide rail slider assembly. The sliding seats 3 are connected to clamping arms 301, and the ends of the clamping arms 301 can be provided with flexible pads or contoured pressure blocks according to the surface shape of the sill beam 7 to avoid damaging the surface of the sill beam 7.

[0033] With the above solution, the sill beam 7 can be clamped by the clamping arm 301 simply by driving the two sliding seats 3 to move towards each other using the drive component. The common way to drive the sliding seats 3 is to use cylinders. However, if cylinders are used, each sliding seat 3 needs to be connected to a cylinder as a power source. This approach has two drawbacks: firstly, since the two sliding seats in a set are driven by two separate cylinders, any difference in synchronization between the two cylinders will severely affect the reliability of the clamping; secondly, since the cylinders need to be connected to air supply pipes, and the rotating seat 2 needs to rotate, there is a risk of pipe entanglement, frequent pipe twisting, or friction with the equipment, which will affect the service life of the pipes.

[0034] To avoid the aforementioned problems caused by using a cylinder to drive the sliding seat 3, the drive assembly in this embodiment includes a first lead screw 4, a second lead screw, and a drive motor 5. The first lead screw 4 and the second lead screw are arranged perpendicularly to each other and are rotatably connected to the rotating seat 2 through a bearing with a seat.

[0035] The sliding seat 3 is connected to the threaded nut sleeve 307, and two sliding seats 3 in one set of clamping components are respectively engaged with the first lead screw 4 through the threaded nut sleeve 307. Two sliding seats 3 in another set of clamping components are respectively engaged with the second lead screw through the threaded nut sleeve 307. The first lead screw 4 and the second lead screw are driven to rotate by the drive motor 5, so as to drive the two sliding seats 3 in each set of clamping components to move synchronously in opposite directions.

[0036] Similarly, since the first lead screw 4 and the second lead screw need to be driven by the drive motor 5 as the drive source, if the drive motor 5 is installed on the rotary seat 2, on the one hand, the cable connected to the drive motor 5 will still have the same problem as the cylinder air supply pipe. On the other hand, since the clamping directions of the two sets of clamping components are perpendicular and the two sets of clamping actions need to be performed independently (alternating clamping), if two independent drive motors 5 are installed on the rotary seat 2 respectively, it will not only increase the weight and inertia of the rotating part, but also require solving the problems of follow-up power supply and signal transmission, making the structure complex and increasing the cost.

[0037] Therefore, in the design of the scheme, it is necessary to ensure that the position of the drive motor 5 can be fixed, that is, not rotate with the rotating seat 2, and also to ensure that one drive motor 5 can switch to drive the first lead screw 4 and the second lead screw to rotate, so as to eliminate the above problems.

[0038] Therefore, such as Figure 3 and Figure 6As shown, the drive motor 5 is fixedly connected to the side plate 102 of the frame, and the output end of the drive motor 5 is fixedly connected to the drive wheel 501. The drive motor 5 is mounted and fixed on the side plate 102 of the frame, thus eliminating the need to consider power supply and signal transmission issues, and also avoiding increasing the weight and inertia of the rotating parts. Furthermore, each rotating seat 2 corresponds to one drive motor 5, and one drive motor 5 drives the first lead screw 4 and the second lead screw to rotate respectively, which can also reduce the number of drive motors 5 and reduce the input of components.

[0039] Since the position of the drive motor 5 is fixed, if the first lead screw 4 and the second lead screw are to be able to transmit power to the drive motor 5, the first lead screw 4 and the second lead screw need to be kept in the same plane. In this way, the position of the first lead screw 4 and the second lead screw can be switched by rotating the rotating seat 2, so that the first lead screw 4 and the second lead screw can transmit power to the drive wheel 501.

[0040] Since the first lead screw 4 and the second lead screw are set perpendicularly to each other, conventional structures cannot achieve a coplanar arrangement between them. In order to achieve the above-mentioned design requirements, the specific implementation method of this embodiment is as follows: like Figure 9 and 10 As shown, the first lead screw 4 is a bidirectional lead screw with opposite thread directions on its left and right sections. The second lead screw consists of two independent lead screws, A401 and B402, which are located in directions perpendicular to the first lead screw 4. The first lead screw 4, lead screw A401, and lead screw B402 are all rotatably connected to the rotating seat 2 via bearings, and all three are arranged in the same plane without interfering with each other.

[0041] Furthermore, driven wheels 403 are fixedly connected to both ends of the first lead screw 4, as well as one end of lead screw A401 and lead screw B402. Since the second lead screw is divided into lead screw A401 and lead screw B402, lead screw A401 and lead screw B402 cannot rotate synchronously if they are independent of each other, thus failing to achieve the purpose of synchronously driving the two sliding seats 3 with the first lead screw 4.

[0042] Therefore, a transmission connection is needed between lead screws A401 and B402 to ensure their synchronous rotation. Specifically, a transition wheel 201 is rotatably connected to the rotating seat 2. One end of both lead screws A401 and B402 is fixedly connected to a transmission wheel 404 that meshes with the transition wheel 201. The transition wheel 201 and the transmission wheel 404 are bevel gears. The two lead screws A401 and B402 are driven through the transition wheel 201. When lead screw A401 or lead screw B402 is driven, the power is transmitted through the transmission wheel 404 and the transition wheel 201 to the transmission wheel 404 of the other lead screw, thus ensuring that lead screws A401 and B402 always rotate in opposite directions at the same speed, thereby driving the corresponding two sliding seats 3 to move synchronously in opposite directions. This transmission structure not only ensures the synchronicity of movement but also allows the two lead screws to be arranged on the same side plane of the rotating seat 2, creating conditions for providing power to the subsequent single fixed drive motor 5.

[0043] like Figure 6 and Figure 7 As shown, during the rotation of the rotating seat 2, when the first lead screw 4, lead screw A401 or lead screw B402 is axially parallel to the driving wheel 501, and the driven wheel 403 connected thereto meshes with the driving wheel 501.

[0044] Specifically, when the rotary seat 2 rotates under the drive of the servo motor 101, the axial direction of the first lead screw 4, lead screw A401, or lead screw B402 mounted on it will successively become parallel to the axis of the driving wheel 501. When the rotary seat 2 rotates to a certain angle, for example, when the axis of lead screw A401 is parallel to (or coplanar and perpendicular to) the axis of the driving wheel 501, depending on the gear type, the driven wheel 403 at the end of lead screw A401 will engage with the fixed driving wheel 501. At this time, starting the drive motor 5 will drive lead screw A401 to rotate through the engagement of driving wheel 501 and driven wheel 403, thereby causing the second lead screw to drive the sliding seat 3 of the first set of clamping components to move, realizing the clamping or releasing action.

[0045] like Figure 8 As shown, when the second set of clamping components needs to be activated, the servo motor 101 drives the rotary seat 2 to rotate through a certain angle (e.g., 90°), so that the driven wheel 403 at the end of the first lead screw 4 is aligned and engaged with the driving wheel 501. At this time, the drive motor 5 is started, and the second set of clamping components can be activated through the first lead screw 4.

[0046] By adopting this "fixed drive motor + rotating seat selective engagement" structure, only one drive motor 5 is needed to drive two sets of mutually perpendicular clamping components in a time-sharing manner, which greatly reduces the number of follow-up electrical components, reduces the weight and inertia of the rotating seat 2, makes the overall structure more compact and reliable, and reduces the difficulty of manufacturing and assembly.

[0047] In the prior art, if the clamping arm 301 remains horizontal when it is open, it will occupy a large operating space and may interfere with the vision system or the conveyor line; if it extends before clamping, additional power is required to drive its swing.

[0048] In order to enable the clamping arm 301 to be flipped and stored when not clamping without adding an additional drive source, the present invention realizes that the clamping arm 301 automatically completes posture adjustment during movement through mechanical linkage.

[0049] Specifically, such as Figure 5 , Figure 6 and Figures 9-11 As shown, the rotating seat 2 is fixedly connected to a rack 202 that corresponds one-to-one with the sliding seat 3; the clamping arm 301 is fixedly connected to a rotating shaft 302, and the clamping arm 301 is rotatably connected to the sliding seat 3 through the rotating shaft 302, and a worm gear 303 is fixedly connected to one end of the rotating shaft 302. The sliding seat 3 is rotatably connected to a rotating shaft 304, and a worm 305 that cooperates with the worm gear 303 is fixedly connected to one end of the rotating shaft 304, and a traveling wheel 306 (the traveling wheel is a gear structure) that meshes with the rack 202 is fixedly connected to the other end.

[0050] When the sliding seat 3 moves towards the sill beam, the traveling wheel 306 rolls along the rack 202 and drives the rotating shaft 302 to rotate through the worm gear 305 and worm wheel 303, thereby driving the clamping arm 301 to flip. By reasonably designing the number of teeth of the rack 202 and the transmission ratio of the worm gear 305 and worm wheel 303, when the sliding seat 3 completes the set stroke, the clamping arm 301 can be rotated 90° from the initial vertical storage state (to avoid interference) to a horizontal state, that is, parallel to the clamped surface of the sill beam 7. Furthermore, due to the self-locking property of the worm gear, the clamping arm 301 can remain fixed in the flipped position when there is no power input.

[0051] like Figure 5 As shown, the moment the clamping arm 301 rotates to a horizontal position, the traveling wheel 306 just completes the toothed section of the rack 202 and disengages from it. Afterward, the sliding seat 3 continues to move forward a small distance under the drive of the lead screw. The clamping arm 301 no longer rotates but directly presses against the surface of the sill beam 7, achieving stable clamping. When release is needed, i.e., when the sliding seat 3 moves away from the sill beam 7, after the clamping arm 301 disengages from the workpiece, the traveling wheel 306 re-engages with the rack 202, subsequently driving the clamping arm 301 to rotate in the opposite direction and return to its vertical retracted state, thereby maximizing the operating space and avoiding interference with the inspection.

[0052] Considering that the sill beam 7 has certain dimensional tolerances, the same clamping position may have different clamping stability for sill beams 7 of different sizes. Furthermore, when the sliding seat 3 drives the clamping arm 301 to clamp the sill beam 7, it is prone to hard impact, which may easily damage the sill beam 7. Therefore, an elastic buffer structure is added in this embodiment to avoid the above-mentioned technical problems.

[0053] Specifically, such as Figure 11 and Figure 12 As shown, the threaded nut 307 and the sliding seat 3 are connected by a sliding key, allowing the threaded nut 307 to move axially relative to the sliding seat 3 while maintaining a fixed circumferential position. Furthermore, both ends of the threaded nut 307 have limiting flanges 308, and a compression spring 309 is fitted onto the threaded nut 307, with the compression spring 309 abutting against the limiting flange 308 at the end of the threaded nut 307 facing away from the clamping direction.

[0054] Under normal conditions, the nut sleeve 307 pushes the sliding seat 3 to move through the compression spring 309. When the clamping arm 301 clamps the threshold beam 7, the sliding seat 3 is blocked and stops, while the nut sleeve 307 continues to move forward a distance under the drive of the first lead screw 4 or the second lead screw. The nut sleeve 307 squeezes the compression spring 309, so that the compression spring 309 is in a compressed state. In this way, the clamping force is provided by the elasticity and flexibility of the compression spring 309, which not only ensures reliable clamping, but also prevents damage to the workpiece or drive components due to overload and hard impact.

[0055] Based on the above specific implementation methods, the testing method for the quality testing equipment of new energy vehicle door sill beams includes the following steps: Step 1: Clamp once, such as Figure 7 As shown, the conveyor line transports the sill beam 7 to be inspected between the two rotating seats 2 inside the vision inspection mechanism 6. At this time, both sets of clamping components are in the open and retracted state. The servo motor 101 drives the rotating seats 2 to rotate. Taking the first lead screw 4 as the first drive, the driven wheel 403 at the end of the first lead screw 4 is aligned and meshed with the driving wheel 501. The drive motor 5 starts, driving the first lead screw 4 to rotate, and the two sliding seats 3 of the first set of clamping components move towards each other. During the movement, the traveling wheel 306 cooperates with the rack 202 to drive the clamping arm 301 to rotate from the vertical state to the horizontal state. Then the traveling wheel 306 disengages from the rack 202, and the clamping arm 301 flexibly presses the upper and lower surfaces (or left and right surfaces, depending on the initial setting; the initial position is determined by the installation position of the drive motor 5) of the sill beam 7 under the buffering action of the compression spring 309, completing one clamping cycle.

[0056] Step 2: After the first set of clamping components is clamped, the drive motor 5 stops. The servo motor 101 starts and drives the two rotating seats 2 and the sill beam 7 to rotate synchronously and slowly through the transmission shaft 103 (usually rotating 90° or pausing multiple times at a preset angle).

[0057] by Figure 7 For example, after one clamping, the rotating seat 2 drives the sill beam 7 to rotate 90° to inspect the upward-facing surface of the sill beam 7 in the figure. After the inspection is completed, the rotating seat 2 drives the sill beam 7 to rotate another 180°, thereby inspecting the surface of the sill beam 7. Figure 7 The inspection is performed on the downward-facing surface. During this process, the visual inspection mechanism 6 continuously or in stages acquires images of the surface of the sill beam 7 that is not obscured by the clamping arm 301, and transmits them to the host computer for defect identification and analysis.

[0058] Step 3: Alternate clamping. Use another set of clamping components to clamp the sill beam, and then release the clamping components from the previous clamping state to achieve alternating clamping and staggered clamping positions. After one test is completed, the sill beam 7 rotates back to its initial angle. At this time, the second set of clamping components is still in the open state. The servo motor 101 drives the rotating seat 2 to rotate, so that the driven wheel 403 at the end of the lead screw A401 or lead screw B402 meshes with the driving wheel 501.

[0059] At this time, the drive motor 5 starts, driving the lead screws A401 and B402 to rotate synchronously. The two clamping arms 301 of the second set of clamping components also complete the extension, rotation, and clamping actions, pressing them against the other two side walls of the sill beam 7. After confirming that the second set of clamping components is clamped in place, the servo motor 101 drives the rotating seat 2 to rotate, causing the first lead screw 4 to be transmitted to the drive motor 5 again. The drive motor 5 then drives the first lead screw 4 again, driving the sliding seat 3 in the first set of clamping components to move away from the sill beam 7 in the opposite direction, causing the clamping arms 301 to release and retract into a vertical position. At this time, the area that was originally covered by the first set of clamping arms 301 is completely exposed.

[0060] Step 4: Secondary inspection. Servo motor 101 drives the rotating seat 2 and sill beam 7 to rotate again. The vision inspection mechanism 6 acquires images of the surface areas missed in the previous inspection due to clamping obstruction, completing 100% coverage inspection of the six surfaces of the sill beam 7.

[0061] Step 5: After the secondary inspection is completed, drive motor 5 drives the second set of clamping components to release and retract. The conveyor line then moves the inspected sill beam 7 out of the inspection station, and the equipment is ready to enter the next work cycle.

[0062] By combining the above-mentioned method of alternating clamping and rotation detection, this invention realizes automatic full-surface detection of the door sill beam of new energy vehicles without blind spots in a single vision inspection device, effectively avoiding the problem of missed detection caused by clamping obstruction, eliminating the need for secondary transfer and clamping processes, and significantly improving detection efficiency and automation level.

[0063] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A quality inspection device for door sill beams of new energy vehicles, comprising a visual inspection mechanism and a conveyor line, characterized in that, The visual inspection mechanism is equipped with a clamping and flipping mechanism (1); the clamping and flipping mechanism (1) includes two symmetrically arranged rotating seats (2) and a servo motor (101) that drives the rotating seats (2) to rotate. The rotating seat (2) is provided with two sets of clamping components, and the clamping directions of the two sets of clamping components are set perpendicularly, so that the two sets of clamping components clamp different side walls of the threshold beam respectively. The threshold beam is alternately clamped by the two sets of clamping components, so that the surface to be detected is not blocked by the clamping components. The threshold beam is rotated by the rotating seat (2) to realize the full surface detection of the threshold beam.

2. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 1, characterized in that, The clamping and flipping mechanism (1) includes two frame side plates (102), two rotating seats (2) are rotatably connected to the opposite sides of the two frame side plates (102), and a servo motor (101) is connected to one side of one of the frame side plates (102) and rotatably connected to the drive rotating seat (2).

3. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 2, characterized in that, The two frame side plates (102) are rotatably connected to a drive shaft (103), and one end of the drive shaft (103) is rotatably connected to a servo motor (101), and the other end is connected to another rotating seat (2) for transmission through the drive shaft (103) to achieve synchronous rotation of the two rotating seats (2).

4. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 1, 2, or 3, characterized in that, Each clamping assembly includes two oppositely arranged sliding seats (3), and the sliding seats (3) are slidably connected to the rotating seat (2); The sliding seat (3) is connected to a clamping arm (301), which is used to drive the two sliding seats (3) to move towards each other through the driving component, and to clamp the sill beam by means of the clamping arm (301).

5. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 4, characterized in that, The drive assembly includes a first lead screw (4), a second lead screw and a drive motor (5). The first lead screw (4) and the second lead screw are arranged perpendicularly to each other and are rotatably connected to the rotating seat (2). The sliding seat (3) is connected to a nut sleeve (307), and the two sliding seats (3) in one set of clamping components are respectively engaged with the first lead screw (4) through the nut sleeve (307), and the two sliding seats (3) in the other set of clamping components are respectively engaged with the second lead screw through the nut sleeve (307), and the first lead screw (4) and the second lead screw are respectively driven to rotate by the drive motor (5), so as to drive the two sliding seats (3) in each set of clamping components to move synchronously in opposite directions.

6. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 5, characterized in that, The first lead screw (4) is a bidirectional lead screw, and the second lead screw is divided into lead screw A (401) and lead screw B (402). Both ends of the first lead screw (4) and one end of lead screw A (401) and lead screw B (402) are fixedly connected to driven wheels (403). The rotating seat (2) is rotatably connected to a transition wheel (201). One end of each lead screw A (401) and lead screw B (402) is fixedly connected to a transmission wheel (404) that meshes with the transition wheel (201), so that lead screw A (401) and lead screw B (402) rotate synchronously, and the first lead screw (4), lead screw A (401) and lead screw B (402) are all located in the same plane; The drive motor (5) is fixedly connected to the side plate (102) of the frame, and the output end of the drive motor (5) is fixedly connected to the drive wheel (501). During the rotation of the rotating seat (2), when the first lead screw (4), lead screw A (401) or lead screw B (402) is axially parallel to the drive wheel (501), the driven wheel (403) connected to it meshes with the drive wheel (501).

7. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 5 or 6, characterized in that, The rotating seat (2) is fixedly connected to a rack (202) that corresponds one-to-one with the sliding seat (3); the clamping arm (301) is fixedly connected to a rotating shaft (302), the rotating shaft (302) is rotatably connected to the sliding seat (3), and one end of the rotating shaft (302) is fixedly connected to a worm gear (303). The sliding seat (3) is rotatably connected to a rotating shaft (304), and one end of the rotating shaft (304) is fixedly connected to a worm (305) that cooperates with a worm wheel (303), and the other end is fixedly connected to a traveling wheel (306) that meshes with a rack (202). When the sliding seat (3) moves toward the door sill beam, the traveling wheel (306) rolls along the rack (202) and is driven by the worm (305) and the worm wheel (303), so that the clamping arm (301) rotates in a state parallel to the door sill beam, thereby clamping the door sill beam. When the sliding seat (3) moves away from the door sill beam, the clamping arm (301) rotates in a vertical state.

8. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 7, characterized in that, When the clamping arm (301) rotates to a state parallel to the sill beam, the traveling wheel (306) separates from the rack (202) and continues to move through the sliding seat (3), using the clamping arm (301) to clamp the sill beam.

9. The quality inspection equipment for door sill beams of new energy vehicles as described in claim 7, characterized in that, The nut sleeve (307) is connected to the sliding seat (3) by a sliding key, and both ends of the nut sleeve (307) have limiting flanges (308). The nut sleeve (307) is fitted with a compression spring (309). The compression spring (309) abuts against the limiting flange (308) at the end of the nut sleeve (307) facing away from the clamping direction. The nut sleeve (307) pushes the sliding seat (3) to move through the compression spring (309). When the clamping arm (301) clamps the threshold beam, the nut sleeve (307) squeezes the compression spring (309), so that the compression spring (309) is in a compressed state.

10. A testing method for the quality testing equipment of door sill beams in new energy vehicles, characterized in that, The device applied to the quality inspection equipment for door sill beams of new energy vehicles as described in claims 1 to 9 includes the following steps: Step 1: First clamping. The sill beam is transported to the visual inspection mechanism via the conveyor line and clamped by one of the clamping components. Step 2: First inspection, the sill beam is rotated by the rotating seat (2), and the unclamped surface of the sill beam is inspected by the vision inspection mechanism; Step 3: Alternate clamping. Use another set of clamping components to clamp the sill beam, and then release the clamping components from the previous clamping state to achieve alternating clamping and staggered clamping positions. Step 4: Secondary inspection. The sill beam is rotated by the rotating seat (2), and the remaining surface of the sill beam after the first inspection is inspected by the vision inspection mechanism to complete the full surface inspection. Step 5: Release the clamping components from the sill beam during the secondary clamping process to allow the sill beam to be unloaded.

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