A surface precision detection fixture for integrated die-casting new energy vehicle rear floor

Abstract

This invention discloses an integrated die-cast rear floor surface precision inspection fixture for new energy vehicles, relating to the field of automotive parts inspection fixtures. It includes a feeding conveyor belt with a testing mechanism on one side. The testing mechanism comprises a pressure plate assembly and a support assembly. The support assembly includes a bearing housing, one side surface of which is connected to one side surface of the feeding conveyor belt. Multiple internal support piles are arranged inside the upper surface of the bearing housing. The pressure plate assembly includes a support top frame, which is located on the side surface of the feeding conveyor belt. A driving hydraulic cylinder is located at the center of the upper surface of the support top frame. A connecting bracket is located at the end of the output shaft of the driving hydraulic cylinder, and a driving telescopic rod is located on one side surface of the connecting bracket. In this solution, by incorporating the testing mechanism, high-precision double-sided high-speed inspection of the workpiece under a high-rigidity benchmark is achieved, solving the inconveniences of traditional equipment, such as cumbersome changeovers and blind spots caused by workpiece deformation.

Description

Technical Field

[0001] This invention relates to the field of automotive parts inspection tools, specifically an integrated die-cast rear floor surface precision inspection tool for new energy vehicles. Background Technology

[0002] As the new energy vehicle industry accelerates its iteration towards lightweighting and high safety, the manufacturing process of vehicle body structural components has undergone significant changes. In particular, the rear floor, as a core load-bearing component of the passenger compartment, has widely adopted integrated die-casting technology. This technology integrates dozens of traditional stamped parts into a single large and complex aluminum alloy component, which not only greatly simplifies the vehicle body structure and reduces welding processes and connection points, but also effectively reduces the overall vehicle weight and improves torsional stiffness. It has become an important technical route for major OEMs to enhance product competitiveness. The integrated die-cast rear floor is characterized by its large size, complex structure, and thin and uneven wall thickness. Such parts typically integrate key functional areas such as battery pack mounting positions, seat mounting points, and rear longitudinal beam connection surfaces. Its surface flatness, hole accuracy, and contour tolerance directly determine the assembly quality, sealing performance, and collision safety performance of the entire vehicle. Therefore, after die-casting and before assembly welding, conducting rapid and comprehensive surface accuracy and contour inspection on such parts is an important step in ensuring the consistency of product quality after production.

[0003] Current technologies have some drawbacks. The industry primarily relies on offline coordinate measuring machines (CMMs) or online non-contact optical scanning systems for the inspection of large, thin-walled parts. While CMMs offer extremely high accuracy, their long inspection cycles and stringent temperature control requirements necessitate operation under harsh conditions of constant temperature, humidity, and vibration. This means workpieces must be transported from the production line to a dedicated metrology room, which is not only time-consuming but also prevents online full inspection. Given the high output rate of integrated die-casting systems, often producing one piece per minute, the long inspection cycle of CMMs (typically several hours) becomes a bottleneck for production line efficiency. Manufacturers are often forced to adopt a sampling inspection model, leading to a significant risk of missed inspections in quality control. While online optical inspection offers faster speeds... While the speed is relatively fast, its data stability is widely criticized. Die-cast parts often have residual mold release agents, cutting fluid, or complex oxidation textures on their surfaces. These media can easily cause laser scattering or image noise, leading to frequent missing, distorted, or false features in the collected point cloud data. In addition, whether it is optical scanning or contact scanning, when dealing with parts with complex free-form surfaces such as vehicle floor, each vehicle model change means complicated debugging work. Engineers must re-perform tedious point cloud alignment, coordinate system reconstruction, and complex algorithm parameter debugging. The whole process is time-consuming, labor-intensive, and requires extremely high personnel skills. This not only prolongs equipment downtime but also makes it difficult to maintain long-term stable repeatability accuracy in the harsh environment of dusty, oily, and vibrating workshops, resulting in a high misjudgment rate. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated die-cast rear floor surface precision inspection fixture for new energy vehicles, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated die-cast rear floor surface precision inspection fixture for new energy vehicles, comprising: A feeding conveyor belt is provided with a testing mechanism on one side. The testing mechanism includes a pressure plate assembly and a support assembly. The support assembly includes a bearing box, one side surface of which is connected to one side surface of the feeding conveyor belt. Multiple support inner piles are provided inside the upper surface of the bearing box. Each support inner pile has a limiting ball groove at its upper end. Supporting balls are provided inside the limiting ball groove. A liftable support plate is also provided at the center of the upper surface of the bearing box. The pressure plate assembly includes: a support top frame, which is disposed on the side surface of the feeding conveyor belt; a driving hydraulic cylinder is disposed at the center of the upper surface of the support top frame; a connecting bracket is disposed at the end of the output shaft of the driving hydraulic cylinder; a driving telescopic rod is disposed on one side surface of the connecting bracket; a bottom protrusion is disposed at the end of the output shaft of the driving telescopic rod; a flipping protrusion is connected to the upper surface of the bottom protrusion through a small rotating shaft; a lower pressure plate is disposed on the bottom surface of the connecting bracket; and multiple probe components are disposed at the center of the lower pressure plate.

[0006] Furthermore, the surface of the support plate is provided with multiple circular openings for exposing the support balls, and the inner bottom surface of the bearing box is also provided with multiple telescopic motors. The output shaft ends of the telescopic motors are connected to the bottom surface of the support plate. Both sides of the bottom surface of the support plate are provided with rotatable flip side plates. A blocking block is provided on the surface of the two flip side plates that are close to each other, and a force-bearing circular groove is provided on one side surface of the blocking block.

[0007] Furthermore, the probe component includes an observation sub-box, inside which are arranged three miniature laser displacement sensors. On one side surface of the observation sub-box are arranged five rubbing main boxes, and on one side surface of each rubbing main box are arranged a clamping side box. On the side surface of the rubbing main box connected to the observation sub-box, a communication opening is provided. Inside the rubbing main box is a movable inner box that can slide up and down. Inside the movable inner box is a force probe, and at the bottom end of the force probe is a weight ring.

[0008] Furthermore, a force-bearing protrusion is fitted on the surface of the force-bearing probe. A small spring is connected between the upper surface of the force-bearing protrusion and the inner upper surface of the movable inner box. The upper end of the force-bearing probe extends from the inside of the upper surface of the movable inner box. A top collar is fitted on the outer surface of the protruding part of the force-bearing probe. Connecting elastic ropes are provided on both sides of the top collar. A force-bearing clamp is provided on one side of the movable inner box.

[0009] Furthermore, the force-bearing clamp is located inside the clamping side box, and one side surface of the printing main box is also provided with a slide rail to facilitate the sliding of the force-bearing clamp. Both sides of the force-bearing clamp are provided with connecting rods, and the upper end of the connecting rod is provided with an end connecting block. One side surface of the end connecting block is connected to one end of the connecting elastic rope. Each clamping side box is provided with two clamping vertical rods inside, and a meshing main rod is provided between every two clamping vertical rods. Multiple meshing main rods in the same row are connected to form a long rod, and a small motor is provided at one end of each long rod.

[0010] Furthermore, the testing mechanism also includes a side clamp assembly, which includes: a sliding limiting strip, the sliding limiting strip being disposed on one side surface of the feeding conveyor belt, a drive motor being disposed on one side surface of the sliding limiting strip, a bidirectional screw being disposed on the output end of the drive motor, engagement side rods being engaged at both ends of the surface of the bidirectional screw, a movable plate frame being disposed on one side surface of the engagement side rod, a bottom pulley being disposed on the bottom surface of the movable plate frame, a slidable limiting lifting platform being disposed on one side surface of the movable plate frame, bottom force plates being disposed on both sides of the bearing box, and an opening being provided at the center of the movable plate frame to facilitate the passage of the bottom force plate.

[0011] Furthermore, the bottom surface of the limiting lifting platform is provided with a top extension motor, one side surface of the limiting lifting platform is provided with a drive turntable, one side surface of the drive turntable is provided with a front end connecting block, the upper surface of the front end connecting block is provided with a top protrusion, one side surface of the front end connecting block is also provided with an electric rotating shaft, one side surface of the electric rotating shaft is provided with an end clamping block, one side surface of the end clamping block is provided with a transverse transmission belt, a transverse groove is opened at the center of the end clamping block, a movable protrusion is provided inside the transverse groove, and connecting springs are provided at the connection points between the two ends of the movable protrusion and the end clamping block.

[0012] Furthermore, the testing mechanism has an exit component on the side of its surface opposite to the feeding conveyor belt. The exit component includes a defective product conveyor belt, which is located on one side of the carrier box. A qualified product conveyor belt is located on the upper surface of the defective product conveyor belt. A connecting vertical plate is provided at the feeding ends of the qualified product conveyor belt and the defective product conveyor belt. Two feeding ports are provided on the surface of the connecting vertical plate. A spring connecting rod is provided between the defective product conveyor belt and the carrier box. A feeding lifting slide is provided on the upper surface of the spring connecting rod. A locking groove is provided on the upper surface of the feeding lifting slide.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. In this solution, a pressure plate assembly is installed, which drives the connecting bracket downward through a hydraulic cylinder. A small motor drives the meshing main rod to rotate, controlling the clamping vertical rod to quickly tighten and loosen the force-bearing block. Thus, the physical imprinting and rigid locking of the standard part is completed through the displacement of the movable inner box, giving the equipment a certain degree of flexible adaptability. Only the standard part needs to be replaced and pressed once, and the imprinting of the floor surface of the new car can be completed in a few seconds. There is no need for complex robot teaching or software reconstruction, which shortens the production line changeover time. During the inspection, the deformation structure of the top of the force probe is monitored by observing the micro laser displacement sensor in the auxiliary box. The differential comparison principle is used to transform the micro-concave and convex deviations into macro-geometric changes, realizing non-contact high-frequency dynamic capture of micron-level undulations of complex free-form surfaces. Compared with traditional single contact measurement, it significantly improves the sampling frequency and anti-interference ability, and solves the problem of missing detection of small defects. 2. In this solution, a dual-mode support mechanism with dynamic and static switching is constructed by integrating a liftable support plate and a flip-up side plate into the carrier box. During the workpiece loading stage, the support ball provides low-friction flow. During the detection stage, the telescopic motor drives the support plate to move upward, and the flip-up side plate drives the blocking block to instantly seal the circular opening. During the detection, an absolutely flat and highly rigid reference plane is constructed. Through the cooperation of the force-bearing circular groove and the spherical surface of the support ball, the micro-movement and vibration of the large thin-walled die-casting part under the action of the probe contact force are effectively suppressed, ensuring the repeatability and spatial stability of the measurement data. 3. In this solution, a side clamping assembly is installed, and a drive motor drives a bidirectional screw to move the movable plate frame in opposite directions. The transverse transmission belt on the end clamping block realizes flexible clamping and horizontal transmission of the workpiece. The end clamping block is flipped by an electric rotating shaft, and the height of the lifting platform is adjusted and limited by the top extension motor. The elastic extension and contraction of the movable protrusion and connecting spring realizes the workpiece flipping in a narrow space without damage. It integrates the functions of "clamping-transmission-lifting-flipping", eliminating the huge working space and high cost required by traditional large flipping robotic arms, avoiding the squeezing deformation and scratches on the workpiece surface caused by traditional grippers or suction cups, and improving the space utilization rate of the production line and the yield rate of workpieces. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the side clamp assembly structure of the present invention; Figure 3 This is a schematic diagram of the supporting flat plate structure of the present invention; Figure 4 This is a schematic diagram of the load-bearing box and supporting inner pile structure of the present invention; Figure 5This is a schematic diagram of the pressure plate assembly structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the probe component of the present invention; Figure 7 This is a schematic diagram of the movable inner box and force probe structure of the present invention; Figure 8 This is a schematic diagram of the internal structure of the movable inner box of the present invention.

[0015] In the diagram: 1. Feed conveyor belt; 2. Qualified product conveyor belt; 3. Defective product conveyor belt; 4. Feeding lifting slide; 5. Connecting vertical plate; 6. Locking groove; 7. Spring connecting rod; 8. Bearing box; 9. Sliding limiting strip; 10. Bidirectional screw; 11. Drive motor; 12. Movable plate frame; 13. Support top frame; 14. Support plate; 15. Lower pressure plate; 16. Drive hydraulic cylinder; 17. Engaging side rod; 18. Bottom pulley; 19. Limiting lifting platform; 20. Top extension motor; 21. Bottom force plate; 22. Drive turntable; 23. Front connecting block; 24. Top position protrusion; 25. Electric rotating shaft; 26. End clamping block; 27. Movable protrusion; 28. Connecting spring; 29. ​​Horizontal... 30. Drive belt; 31. Circular opening; 32. Telescopic motor; 33. Flip-over side plate; 34. Blocking block; 35. Force-bearing circular groove; 36. Supporting inner pile; 37. Supporting ball; 38. Connecting bracket; 39. Drive telescopic rod; 40. Bottom protrusion; 41. Flip-over protrusion; 42. Clamping side box; 43. Imprinting main box; 44. Observation auxiliary box; 45. Small motor; 46. Clamping vertical rod; 47. Engaging main rod; 48. Force-bearing clamping block; 49. Top collar; 50. Miniature laser displacement sensor; 51. Connecting support rod; 52. End connecting block; 53. Force-bearing probe; 54. Connecting elastic rope; 55. Movable inner box; 56. Weighting ring; 57. Force-bearing protrusion ring; 58. Small spring. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figures 1 to 8 An integrated die-cast rear floor surface precision inspection fixture for new energy vehicles, comprising: A feeding conveyor belt 1 has a testing mechanism on one side. A release component is located on the side of the testing mechanism facing away from the feeding conveyor belt 1. The testing mechanism includes a pressure plate assembly and a support assembly. The support assembly forms the reference base of the testing fixture. The support assembly includes a bearing box 8, which serves as the core mounting base. One end face of the bearing box 8 is securely connected to the frame of the feeding conveyor belt 1 to ensure the continuity of workpiece transmission. Multiple inner support piles 35 are arranged inside the upper surface of the bearing box 8. Each inner support pile 35 has a limiting ball groove at its upper end. Supporting balls 36 are arranged inside the limiting ball groove and can move freely within the limiting ball groove, forming an adaptive floating support array for... The support box 8 is equipped with a liftable support plate 14 at the center of the upper surface. The surface of the support plate 14 has multiple circular openings 30 for exposing the support ball 36. The diameter of the circular openings 30 is designed to be slightly larger than the diameter of the support ball 36, so as to allow the support ball 36 to pass through the opening under specific working conditions. The bottom surface of the support box 8 is also equipped with multiple telescopic motors 31. The output shaft of the telescopic motor 31 is connected to the bottom surface of the support plate 14. Both sides of the bottom surface of the support plate 14 are equipped with flip-up side plates 32. The surface of the two flip-up side plates 32 that are close to each other is equipped with a blocking block 33. The surface of the blocking block 33 is equipped with a force-bearing circular groove 34. In use, the support assembly supports the rear floor inspection piece, facilitating subsequent inspection by the pressure plate assembly. After the inspection piece is conveyed to the end via the feed conveyor belt 1, it moves above the carrier box 8 after exiting the feed conveyor belt 1. At this point, the bottom surface of the inspection piece is supported by multiple support rollers 36. Subsequently, the side clamping assembly clamps the inspection piece from both sides and moves it to the center of the carrier box 8 via two transverse transmission belts 29. Then, multiple telescopic motors 31 inside the carrier box 8 extend simultaneously, lifting the support plate 14 and pushing it up from the bottom surface of the inspection piece, causing its bottom surface to gradually lose contact with the support. The supporting effect of the ball bearing 36 is as follows: when the telescopic motor 31 drives the support plate 14 to rise to the highest position, the flip-up side plates 32 on both sides of the bottom surface of the support plate 14 flip up under the action of the connecting shaft, causing the two flip-up side plates 32 to cover the bottom surface of the support plate 14. At this time, the multiple blocking blocks 33 on the surface of the two flip-up side plates 32 will block the multiple circular openings 30 at the center of the support plate 14, forming a complete flat support plate on the bottom surface of the detection piece with the support plate 14. Subsequently, the telescopic motor 31 drives the support plate 14 to descend, at which time the support ball bearing 36 will be inserted from the multiple force-bearing circular grooves 34 on the bottom surface of the flip-up side plate 32, providing stronger support for the support plate 14.

[0018] The pressure plate assembly constitutes the core execution unit of the testing mechanism. The pressure plate assembly includes: a support top frame 13, which is disposed on the side surface of the feeding conveyor belt 1; a drive hydraulic cylinder 16 is disposed at the center of the upper surface of the support top frame 13, providing the main pressing driving force; a connecting bracket 37 is disposed at the end of the output shaft of the drive hydraulic cylinder 16; a drive telescopic rod 38 is disposed on one side surface of the connecting bracket 37; a bottom protrusion 39 is disposed at the end of the output shaft of the drive telescopic rod 38; a flipping protrusion 40 is connected to the upper surface of the bottom protrusion 39 via a small rotating shaft; and a pressing mechanism is disposed on the bottom surface of the connecting bracket 37. Plate 15 and pressure plate 15 serve as the mounting carrier for the probe module. Multiple probe components are located at the center of pressure plate 15. Each probe component includes an observation sub-box 43, which contains three miniature laser displacement sensors 49 for non-contact monitoring of minute displacements. Five rubbing main boxes 42 are located on one side of the observation sub-box 43. Each rubbing main box 42 has a clamping side box 41 on one side. A communication opening is provided on the side of the rubbing main box 42 that connects to the observation sub-box 43. Inside the rubbing main box 42 is a movable inner box 54 that can slide up and down. The movable inner box 54 contains... A force probe 52 is provided, with a movable inner box 54 serving as the base for the force probe 52. A weight ring 55 is provided at the bottom of the force probe 52 to increase inertia. A force-bearing protrusion 56 is also fitted onto the surface of the force probe 52. A small spring 57 connects the upper surface of the force-bearing protrusion 56 to the inner upper surface of the movable inner box 54. The upper end of the force probe 52 extends from the inside of the upper surface of the movable inner box 54. A top collar 48 is fitted onto the outer surface of the protruding part of the force probe 52. Connecting elastic ropes 53 are provided on both sides of the top collar 48. A force-bearing clamp 47 is provided on one side of the movable inner box 54. Block 47 is located inside the clamping side box 41. One side surface of the printing main box 42 is also provided with a slide for the force-bearing clamping block 47 to slide. Both sides of the force-bearing clamping block 47 are provided with connecting support rods 50. The upper end of the connecting support rod 50 is provided with an end connecting block 51. One side surface of the end connecting block 51 is connected to one end of the connecting elastic rope 53. Each clamping side box 41 is provided with two clamping vertical rods 45. There is a meshing main rod 46 between each pair of clamping vertical rods 45. Multiple meshing main rods 46 in the same row are connected to form a long rod. A small motor 44 is provided at one end of each long rod. The pressure plate assembly is used for direct testing of the test piece. Before testing, the operator first places a standard part that meets the standard on the testing position and uses the pressure plate assembly to imprint both sides of it. The imprint result is then used as a reference for testing the test piece. When imprinting is required, the standard part is transported to the top of the carrier box 8 via the feeding conveyor belt 1. First, the front of the standard part is imprinted by the three rows of probe components near the feeding conveyor belt 1. Driven by the operator's signal, the small motor 44 on the side surface of the three rows of probe components near the feeding conveyor belt 1 is started, driving the long rod composed of multiple meshing main rods 46 to rotate. Through the meshing effect, the clamping vertical rods 45 inside each clamping side box 41 are separated, canceling the clamping action. To ensure the clamping effect of the force-bearing clamp 47, the hydraulic cylinder 16 drives the entire lower pressure plate 15 to descend. When the bottom ends of the multiple force-bearing probes 52 contact the surface of the standard part, each force-bearing probe 52 will cause the force-bearing clamp 47 to slide up or down to different degrees inside the printing box 42, depending on the different unevenness of the standard part's surface. Then, the small motor 44 drives the long rod to rotate in the opposite direction, causing the two clamping vertical rods 45 to move inward again, clamping the force-bearing clamp 47 after lifting and lowering, thus completing the position printing. After the front printing is completed, the standard part can be flipped over and moved a certain distance using the side clamping assembly. The three rows of probe components away from the feed conveyor belt 1 are used to press the standard part... The back is imprinted, and then the inspection work can be carried out after the imprinting is completed. When a test piece arrives at the inspection position, it is first clamped by the side clamp assembly, and then moved to the next step. During the inspection, the lower pressure plate 15 is lowered by the drive hydraulic cylinder 16, and the multiple probe components that have completed the imprinting contact the surface of the test piece. If a certain area of ​​the test piece is dented, the bottom end of the force probe 52 cannot properly contact the surface of the test piece. Then, under the influence of the weight ring 55, the force probe 52 stretches the small spring 57 and descends. At this time, because of the height deviation between the top collar 48 and the end connecting block 51, the two connecting elastic ropes 5 One end of the 3rd section tilts along with the top collar 48 at the center, and the two connecting elastic ropes 53 and the top collar 48 together form a V-shape. If a protrusion occurs in a certain area of ​​the test piece, the force probe 52 at the corresponding position will touch the surface of the test piece in advance and compress the small spring 57 to rise, driving the top collar 48 to move upward. Finally, an inverted V-shape is formed between the two connecting elastic ropes 53 and the top collar 48. The structure formed between the two connecting elastic ropes 53 and the top collar 48 can be observed by the miniature laser displacement sensor 49 inside the auxiliary box 43, thereby quickly analyzing which position has a depression or protrusion, and sending the result to the operator's observation screen for display. After the front inspection of the test piece is completed,The side clamp assembly allows the sample to be flipped over and positioned below the three rows of probes on the reverse side for inspection.

[0019] The testing mechanism also includes a side clamping assembly, which is the core actuator for achieving precise workpiece positioning, transfer, and automated flipping. The side clamping assembly includes: a sliding limiting bar 9, which is located on one side surface of the feeding conveyor belt 1; a drive motor 11 is located on one side surface of the sliding limiting bar 9; a bidirectional screw 10 is located on the output end of the drive motor 11; both ends of the bidirectional screw 10 are engaged with engagement side rods 17; the bidirectional screw 10 has left-hand and right-hand threaded sections, respectively forming a helical transmission engagement with the two sets of engagement side rods 17; synchronous centripetal or centrifugal movement of the two sets of side rods is achieved through forward and reverse rotation drive; a movable plate frame 12 is located on one side surface of the engagement side rods 17; a bottom pulley 18 is located on the bottom surface of the movable plate frame 12; and a slidable limiting lifting platform 19 is located on one side surface of the movable plate frame 12. The limiting lifting platform 19 can be height-adjusted according to the requirements of the testing station, supporting the two sides of the carrying box 8. The surface is also provided with a bottom force plate 21. An opening is provided at the center of the movable plate frame 12 to facilitate the passage of the bottom force plate 21. A top extension motor 20 is provided on the bottom surface of the limiting lifting platform 19. Its output end acts on the bottom force plate 21 and drives the limiting lifting platform 19 to achieve lifting action through the reaction force. A drive turntable 22 is provided on one side surface of the limiting lifting platform 19. A front end connecting block 23 is provided on one side surface of the drive turntable 22. A top protrusion 24 is provided on the upper surface of the front end connecting block 23. An electric rotating shaft 25 is also provided on one side surface of the front end connecting block 23. An end clamping block 26 is provided on one side surface of the electric rotating shaft 25. A transverse transmission belt 29 is provided on one side surface of the end clamping block 26. A transverse groove is provided at the center of the end clamping block 26. A movable protrusion 27 is provided inside the transverse groove. A connecting spring 28 is provided at the connection between the two ends of the movable protrusion 27 and the end clamping block 26. The side clamping assembly is used to clamp the test piece and provide transmission power when necessary. When the test piece arrives above the carrier box 8, the drive motor 11 on the side surface of the sliding limit bar 9 is activated, driving the bidirectional screw 10 to rotate. Through the meshing effect, the two movable plates 12 move inward. The transverse transmission belts 29 on the side surfaces of the two end clamping blocks 26 clamp the two sides of the test piece, and the activation of the transverse transmission belts 29 pulls it above the carrier box 8 to reach the designated testing position. Subsequently, when the support plate 14 of the support assembly lifts the test piece to switch the support base plate, the two transverse transmission belts 29 can maintain the clamping effect on the test piece while limiting the sliding of the lifting platform 19 on the side surface of the movable plate 12, thus following the rise of the test piece and maintaining the clamping effect when the height changes. When the test piece is tested on the front and needs to be flipped, firstly, the support assembly switches back to a state where multiple support balls 36 support the test piece. Then, the two end clamping blocks 26... The end clamping block 26 is rotated 90 degrees upward via the electric rotating shaft 25. At this time, the two top protrusions 24 press against the surfaces of the two movable protrusions 27, causing the movable protrusions 27 to compress the connecting spring 28 and move to the other side of the end clamping block 26. The shovel plates at the bottom of the two movable protrusions 27 are pushed out from the opening on the other side of the end clamping block 26. At this time, by continuing to move closer via the two movable plate frames 12, the test piece can be scooped up from the bottom of both ends and positioned between the two shovel plates. Subsequently, by limiting the top of the bottom surface of the lifting platform 19... The extension motor 20 extends and presses against the surface of the bottom force plate 21, causing the two limiting lifting platforms 19 to slide along the side surface of the movable frame 12 to the highest point. At this point, the flipping process is completed. The drive turntable 22 is started, and the two shovels drive the test piece to flip over above the carrier box 8. After the flipping is completed, it can be restored to the clamping state of the two transverse transmission belts 29. After both sides of the test piece have been tested, it can be carried away from the top of the carrier box 8 by the transverse transmission belts 29 and enter the discharge part for material discharge.

[0020] The exit component constitutes the intelligent sorting and logistics hub at the end of the inspection line. The exit component includes: a defective product conveyor belt 3, which is set on the discharge side of the carrier box 8. Its frame height is low and it is specially used to receive and transport unqualified workpieces to the rework or scrap area. A qualified product conveyor belt 2 is set on the upper surface of the defective product conveyor belt 3. The qualified product conveyor belt 2 is used to transport qualified workpieces to the next assembly station at high speed. The feed ends of the qualified product conveyor belt 2 and the defective product conveyor belt 3 are provided with a connecting vertical plate 5. The connecting vertical plate 5 serves as a transition interface and has two feed interfaces on its surface corresponding to the upper and lower conveyor belts. A spring connecting rod 7 is set between the defective product conveyor belt 3 and the carrier box 8. A feeding lifting slide 4 is set on the upper surface of the spring connecting rod 7. A locking groove 6 is set on the upper surface of the feeding lifting slide 4. The ejection component is used to eject the inspected parts after testing. After testing, the inspected parts are carried to the inside of the feeding lifting slide 4 via two transverse transmission belts 29. Then, the flipping protrusion 40 on the side surface of the connecting bracket 37 flips 180 degrees. Subsequently, the connecting bracket 37 is lowered by the driving hydraulic cylinder 16 until the bottom surface of the flipping protrusion 40 contacts the locking groove 6 on the upper surface of the feeding lifting slide 4. At this point, the driving hydraulic cylinder 16 stops driving, and then the driving telescopic rod 38 extends the bottom protrusion 39. The bottom protrusion 39 and the flipping protrusion 40 secure the locking groove 6 from both the top and bottom. At this time, when the driving hydraulic cylinder 16 moves the connecting bracket 37, it can drive the feeding lifting slide 4 to move synchronously. According to the test results, if the test piece is qualified, the driving hydraulic cylinder 16 drives the feeding lifting slide 4 to rise, so that the test piece slides down to the top of the qualified product conveyor belt 2 for conveying. If the test piece is unqualified, the feeding lifting slide 4 is driven to fall, so that the test piece slides down to the top of the defective product conveyor belt 3 for conveying.

[0021] The working principle of this invention is: During the testing of the integrated die-cast rear floor of a new energy vehicle, the test piece is fed in by the feeding conveyor belt 1. After arriving above the bearing box 8, it is initially supported by the support rollers 36 on multiple support inner piles 35. The drive motor 11 in the side clamping assembly drives the bidirectional screw 10 to rotate, so that the meshing side rod 17 slides along the sliding limit strip 9 through the bottom pulley 18, which drives the transverse transmission belt 29 on the end clamping block 26 to clamp the test piece from both sides and move it to the center of the bearing box 8. At this time, the telescopic motor 31 starts, pushes the support plate 14 to lift, and pushes the test piece away from the support rollers 36. Then the flip side plate 32 flips, and the blocking block 33 on it is embedded in the circular opening 30 of the support plate 14 to form a complete rigid planar support. The support rollers 36 are then stuck into the force-bearing circular groove 34 to enhance stability. The pressure plate assembly drives the connecting bracket 37 to descend via the driving hydraulic cylinder 16, causing the probe component on the lower pressure plate 15 to contact the surface of the test piece. Before testing, a standard part needs to be imprinted: the small motor 44 drives the meshing main rod 46 to rotate, releasing the locking of the clamping vertical rod 45 on the force-bearing clamp 47. The force-bearing probe 52 expands and contracts with the surface of the standard part under the action of the small spring 57. After the imprint is completed, it is relocked to form a reference. During testing, if the surface of the test piece is concave, the force-bearing probe 52 moves down under the gravity of the weight ring 55 because it does not contact the surface, causing the connecting elastic rope 53 between the top collar 48 and the end connecting block 51 to form a V-shape; if the surface is convex, the force-bearing probe 52 is pushed up and compresses the small spring 57, and the connecting elastic rope 53 forms an inverted V-shape. The miniature laser displacement sensor 49 in the observation sub-box 43 captures the deformation in real time, analyzes it, and transmits it to the display screen. After the inspection is completed, the side clamping assembly adjusts and limits the height of the lifting platform 19 by the top extension motor 20. The electric rotating shaft 25 drives the end clamping block 26 to flip. The movable protrusion 27 cooperates with the connecting spring 28 to flip the test piece through the shovel for double-sided inspection. Finally, the driving hydraulic cylinder 16 cooperates with the driving telescopic rod 38 and the flipping protrusion 40 to move the feeding lifting slide 4. According to the inspection results, qualified products are introduced into the qualified product conveyor belt 2, and defective products are introduced into the defective product conveyor belt 3, completing the fully automated inspection process.

[0022] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated die-cast rear floor surface precision inspection fixture for new energy vehicles, characterized in that, include: A feeding conveyor belt is provided with a testing mechanism on one side. The testing mechanism includes a pressure plate assembly and a support assembly. The support assembly includes a bearing box, one side surface of which is connected to one side surface of the feeding conveyor belt. Multiple support inner piles are provided inside the upper surface of the bearing box. Each support inner pile has a limiting ball groove at its upper end. Supporting balls are provided inside the limiting ball groove. A liftable support plate is also provided at the center of the upper surface of the bearing box. The pressure plate assembly includes: a support top frame, which is disposed on the side surface of the feeding conveyor belt; a driving hydraulic cylinder is disposed at the center of the upper surface of the support top frame; a connecting bracket is disposed at the end of the output shaft of the driving hydraulic cylinder; a driving telescopic rod is disposed on one side surface of the connecting bracket; a bottom protrusion is disposed at the end of the output shaft of the driving telescopic rod; a flipping protrusion is connected to the upper surface of the bottom protrusion through a small rotating shaft; a lower pressure plate is disposed on the bottom surface of the connecting bracket; and multiple probe components are disposed at the center of the lower pressure plate.

2. The integrated die-cast rear floor surface precision inspection fixture for new energy vehicles according to claim 1, characterized in that: The surface of the support plate has multiple circular openings for exposing the support balls. The bottom surface of the bearing box is also equipped with multiple telescopic motors. The output shaft of the telescopic motor is connected to the bottom surface of the support plate. Both sides of the bottom surface of the support plate are provided with rotatable side plates. A blocking block is provided on the surface of the two adjacent side plates. A force-bearing circular groove is provided on one side surface of the blocking block.

3. The surface precision inspection fixture for an integrated die-cast rear floor of a new energy vehicle according to claim 1, characterized in that: The probe component includes an observation sub-box, which contains three miniature laser displacement sensors. Five rubbing main boxes are located on one side surface of the observation sub-box, and each rubbing main box has a clamping side box on one side surface. A communication opening is provided on the side surface of the rubbing main box that connects to the observation sub-box. A movable inner box that can slide up and down is located inside the rubbing main box. A force probe is located inside the movable inner box, and a weighting ring is provided at the bottom end of the force probe.

4. The integrated die-cast rear floor surface precision inspection fixture for new energy vehicles according to claim 3, characterized in that: The surface of the force probe is also fitted with a force-bearing protrusion ring. A small spring is connected between the upper surface of the force-bearing protrusion ring and the inner upper surface of the movable inner box. The upper end of the force probe extends from the inside of the upper surface of the movable inner box. A top collar is fitted on the outer surface of the protruding part of the force probe. Connecting elastic ropes are provided on both sides of the top collar. A force-bearing clamp is provided on one side surface of the movable inner box.

5. The integrated die-cast rear floor surface precision inspection fixture for new energy vehicles according to claim 4, characterized in that: The force-bearing clamp is located inside the clamping side box. One side surface of the printing main box is also provided with a slide rail to facilitate the sliding of the force-bearing clamp. Both sides of the force-bearing clamp are provided with connecting support rods. The upper end of the connecting support rod is provided with an end connecting block. One side surface of the end connecting block is connected to one end of the connecting elastic rope. Each clamping side box is provided with two clamping vertical rods. A meshing main rod is provided between every two clamping vertical rods. Multiple meshing main rods in the same row are connected to form a long rod. A small motor is provided at one end of each long rod.

6. The surface precision inspection fixture for an integrated die-cast rear floor of a new energy vehicle according to claim 1, characterized in that: The testing mechanism also includes a side clamp assembly, which includes: a sliding limiting strip, the sliding limiting strip being disposed on one side surface of the feeding conveyor belt, a drive motor being disposed on one side surface of the sliding limiting strip, a bidirectional screw being disposed on the output end of the drive motor, engagement side rods being engaged at both ends of the surface of the bidirectional screw, a movable plate frame being disposed on one side surface of the engagement side rod, a bottom pulley being disposed on the bottom surface of the movable plate frame, a slidable limiting lifting platform being disposed on one side surface of the movable plate frame, bottom force plates being disposed on both sides of the bearing box, and an opening being provided at the center of the movable plate frame to facilitate the passage of the bottom force plate.

7. The integrated die-cast rear floor surface precision inspection fixture for new energy vehicles according to claim 6, characterized in that: The bottom surface of the limiting lifting platform is equipped with a top extension motor, one side surface of the limiting lifting platform is equipped with a drive turntable, one side surface of the drive turntable is equipped with a front connecting block, the upper surface of the front connecting block is equipped with a top protrusion, one side surface of the front connecting block is also equipped with an electric rotating shaft, one side surface of the electric rotating shaft is equipped with an end clamping block, one side surface of the end clamping block is equipped with a transverse transmission belt, a transverse groove is opened at the center of the end clamping block, a movable protrusion is provided inside the transverse groove, and connecting springs are provided at the connection points between the two ends of the movable protrusion and the end clamping block.

8. The integrated die-cast rear floor surface precision inspection fixture for new energy vehicles according to claim 1, characterized in that: The testing mechanism has an exit component on the side of its surface away from the feed conveyor belt. The exit component includes a defective product conveyor belt, which is located on one side of the carrier box. A qualified product conveyor belt is located on the upper surface of the defective product conveyor belt. A connecting vertical plate is provided at the feed end of the qualified product conveyor belt and the defective product conveyor belt. Two feed ports are provided on the surface of the connecting vertical plate. A spring connecting rod is provided between the defective product conveyor belt and the carrier box. A feeding lifting slide is provided on the upper surface of the spring connecting rod. A locking groove is provided on the upper surface of the feeding lifting slide.

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