Multi-stage limiting and locking mechanism for aluminum ornament of vehicle

Abstract

The application discloses a kind of multistage limiting locking mechanisms of vehicle aluminum ornaments, it is related to the technical field of vehicle aluminum ornament installation, including installation main part, the inside of installation main part is also provided with installation assembly, installation assembly includes limiting component and locking component, limiting component includes: multiple limiting sliding seat, multiple limiting sliding seat are all arranged in the inside of installation main part, one end of limiting sliding seat is provided with circular hole, the center of limiting sliding seat is provided with a slidable sliding main cylinder, locking component includes: clamping ring plate, clamping ring plate is arranged in the side surface of sliding main cylinder, the side surface of clamping ring plate is provided with two meshing cylinder rods, the side surface of sliding main cylinder is provided with the round hole for meshing cylinder rod to pass through, in the scheme, by being provided with installation assembly, high-precision rigid locking of sheet metal hole is simultaneously completed without tool intervention, low-damage quick disassembly and assembly are achieved, the industry pain point that traditional single-point buckle is prone to loosening and disassembly is not reversible is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive aluminum trim installation technology, specifically a multi-level limiting and locking mechanism for automotive aluminum trim. Background Technology

[0002] As the automotive industry continues to evolve towards lightweighting, modularization, and high-end products, aluminum alloy trim components, due to their excellent specific strength, corrosion resistance, and superior surface finish, have been widely used in interior and exterior vehicle trim systems, particularly in areas such as door windows, side trim strips, and triangular window decorations. These areas typically involve the connection between sheet metal stampings and trim components, requiring not only the aesthetic function of the exterior components but also the ability to withstand aerodynamic loads, road vibrations, and door opening and closing impacts during vehicle operation. Against this backdrop, the fixing technology for automotive aluminum trim components has become a key factor determining the overall quality and durability of the vehicle. Traditional automotive trim component connections often employ methods such as plastic clips, single-point bolts, or double-sided tape. Plastic clips rely on the elastic deformation of the material to generate holding force, resulting in a simple structure suitable for mass production; bolted connections, on the other hand, provide higher connection strength and are often used for supporting larger structural components.

[0003] In the existing assembly process of automotive aluminum trim parts, the industry generally uses plastic clips, single-point bolts, or structural adhesive bonding to fix sheet metal holes in the window and side panel areas. Traditional plastic clips mainly rely on the elastic deformation of the material itself to generate radial tension and achieve limiting through friction. However, this single-point friction locking method lacks a geometric anti-rotation structure. Under the continuous vibration and impact load generated by long-term vehicle driving, the preload is easily irreversibly reduced due to material creep, which can lead to problems such as loosening of trim parts, changes in surface area, and abnormal noise. While single-point bolt connections provide high static strength, their locking and unlocking processes are often contradictory. Once sufficient anti-loosening torque is applied to achieve fastening, special tools are required for destructive tightening during disassembly, which can easily cause thread stripping or damage to the trim parts, making it impossible to achieve low-damage and rapid maintenance. In addition, existing technologies can usually only provide tension or pushing force in one direction, and cannot build a stable force closed system. This results in the force model of the connection part being mostly an unstable cantilever structure, which lacks the ability to resist shear loads and bending moments, causing inconvenience in use. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-level limiting and locking mechanism for automotive aluminum trim parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage limiting and locking mechanism for automotive aluminum trim parts, comprising:

[0006] The main mounting component includes an internal mounting assembly. This assembly comprises a limiting component and a locking component. The limiting component includes multiple limiting slides, each located within the main mounting component. Each limiting slide has a circular hole at one end and a slidable sliding main cylinder at its center. The surface of the sliding main cylinder has multiple sliding protrusions. The inner side surface of the limiting slide has sliding grooves that mate with the sliding protrusions. One side surface of the sliding main cylinder has a top extension probe. One end of the top extension probe has a connecting plate at its center, and the surface of the top extension probe has multiple lifting bars. The locking component includes: a clamping ring plate, which is disposed on one side surface of the sliding main cylinder. Two meshing cylinder rods are disposed on one side surface of the clamping ring plate. A circular hole is opened on one side surface of the sliding main cylinder to facilitate the passage of the meshing cylinder rods. One end of the meshing cylinder rod is engaged with a meshing screw. A rotating top contact cylinder is disposed at the end of the meshing screw opposite to the meshing cylinder rod. One end of the sliding main cylinder is also provided with a limiting side groove that cooperates with the lifting frame bar. The upper surface of the lifting frame bar is provided with a buffer pad. The upper surface of the lifting frame bar is also provided with a horizontal groove. A small sliding seat is provided inside the horizontal groove. A rotating rod is provided at the center of the small sliding seat. A rotating locking rod is provided on the upper surface of the rotating rod. A flexible pad is provided on one side surface of the rotating locking rod. The bottom surface of the rotating rod is provided with a bottom toothed cylinder, the bottom surface of the lifting frame bar is provided with an inclined block, one side surface of the end connecting plate is provided with a central meshing rod, one end of the central meshing rod is provided with an end rotating handle, the surface of the central meshing rod is engaged with a sliding rod seat, and each support rod of the sliding rod seat is provided with a roller at its end. The sliding main cylinder is also provided with a force-bearing top plate at one end relative to the limiting side groove, and one side surface of the rotating top contact cylinder is in contact with the force-bearing top plate.

[0007] Furthermore, each support rod of the sliding rod seat has a square hole at its center, and a drive tooth plate is provided inside the square hole. A first connecting support rod is provided on one side surface of each drive tooth plate. An inner ring frame is provided at the end of the first connecting support rod connected to the drive tooth plate. An additional connecting block is provided at one end of the inner ring frame. A plurality of folding sliding blocks are provided on one side surface of the additional connecting block.

[0008] Furthermore, the multiple stacking sliding blocks are installed in a stacked manner. The bottommost stacking sliding block has a limiting protrusion on one side surface, and the additional connecting block has a side groove on one side surface that mates with the limiting protrusion. The upper surface of the additional connecting block also has a spring limiting rod that mates with the limiting protrusion. Except for the bottommost stacking sliding block, each of the other stacking sliding blocks has a rotatable rotating support rod at its center and a slidable sliding support plate on its bottom surface. Except for the topmost stacking sliding block, the surfaces of the other stacking sliding blocks have a top groove for sliding the uppermost stacking sliding block. One end of the topmost stacking sliding block has a pull rod.

[0009] Furthermore, a limiting toothed plate is provided inside the square hole at the center of each support of the sliding rod seat. A second connecting support is provided at one end of each limiting toothed plate, and an outer ring frame is provided at the end of the second connecting support connected to the limiting toothed plate.

[0010] Furthermore, a rotating handle is provided on one side surface of the outer ring frame, a limiting arc block is provided on the bottom surface of the outer ring frame, and an internal limiting seat that cooperates with the limiting arc block is provided on the inner bottom surface of the sliding main cylinder.

[0011] Furthermore, a cover plate sub-component is provided on one side surface of the main mounting component, a connecting shaft is provided at the connection between the main mounting component and the cover plate sub-component, a plurality of fixing holes are also provided on one side surface of the main mounting component, and a fixing block that mates with the fixing holes is provided on the side surface of the cover plate sub-component that is close to the main mounting component.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. In this solution, by setting limiting components and constructing a composite transmission mechanism based on multi-link folding and gear rack linkage, a fully adaptive envelope of sheet metal hole diameter tolerances is achieved. Through the layered unfolding of the folding sliding block along the rotating support rod, combined with the instantaneous locking characteristics of the spring limiting rod and limiting protrusion, the single-point support of the traditional rigid buckle is transformed into a multi-point distributed support structure, improving contact stiffness. Simultaneously, when the central meshing rod drives the sliding rod seat axially, the roller at the end of the support rod interacts with the convex protrusion of the inclined block on the bottom surface of the lifting frame bar. The wheel effect converts linear motion into radial tension of the lifting frame bar, and simultaneously triggers the meshing transmission between the drive tooth plate and the bottom tooth cylinder, forcing the rotating lever to complete a 90-degree rotation. This triple progressive limiting logic of "radial tension - axial anchoring - geometric interlocking" not only eliminates the hidden danger of pre-tightening force attenuation caused by material creep in traditional elastic buckles, but also achieves high-precision positioning with zero backlash in irregular sheet metal holes through elastic compensation of flexible gaskets, fundamentally solving the problem of loosening and abnormal noise caused by manufacturing tolerance matching difficulties in existing technologies. 2. In this solution, by incorporating a locking component, the connection strength under extreme conditions is ensured while solving the technical problem of traditional locking mechanisms being "more difficult to disassemble the tighter they are." Through the circumferential engagement of the limiting arc block on the outer ring frame and the inner limiting seat, and the use of the limiting tooth plate to implement a ratchet-type rigid self-locking mechanism on the drive tooth plate, the shape of the limiting component is instantly solidified, effectively resisting high-frequency vibrations and impact loads during vehicle operation. Subsequently, through the precise helical transmission of the rotating top contact cylinder and the meshing screw, the clamping ring plate and the inner rotating lever are driven to form a bidirectional pulling clamping force field, tightly enveloping the sheet metal hole wall. This not only optimizes the stress model from a easily disturbed cantilever structure to a highly stable one... The simply supported beam model further constructs a closed force flow loop through the hard contact between the load-bearing top plate and the limiting side groove. In addition, the locking mechanism has excellent reversibility. During disassembly, it is only necessary to rotate the top contact cylinder in the opposite direction to release the axial preload, and then push the outer ring frame in the opposite direction to release the locking state of the limiting tooth plate. This instantly eliminates the geometric locking effect, restores the sliding freedom of the drive tooth plate, and allows the rotating chuck to reset and be smoothly pulled out of the sheet metal hole. This symmetrical operation logic of "forward thread force-increasing locking and reverse rotation instant release" eliminates the destructive removal or special tool disassembly required for traditional bolt loosening prevention, and realizes high-strength locking and low-damage rapid disassembly of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the cover plate component of the present invention; Figure 4 This is a schematic diagram of the connection structure between the limiting component and the locking component of the present invention; Figure 5 This is a schematic diagram of the internal structure of the limiting component and the locking component of the present invention; Figure 6 This is a schematic diagram of the sliding rod seat and drive tooth plate structure of the present invention; Figure 7 This is a schematic diagram of the lifting frame structure of the present invention; Figure 8 This is a schematic diagram of the drive tooth plate and the limiting tooth plate structure of the present invention; Figure 9 This is a schematic diagram of the stacking sliding block structure of the present invention.

[0014] In the diagram: 1. Main mounting component; 2. Cover plate sub-component; 3. Top extension probe; 4. Restricting slide; 5. Fixing insertion hole; 6. Sliding main cylinder; 7. Connecting shaft; 8. Fixing block; 9. End connecting plate; 10. Lifting frame bar; 11. Rotating locking rod; 12. Buffer pad; 13. Restricting side groove; 14. Sliding protrusion; 15. Force-bearing top plate; 16. Clamping ring plate; 17. Engaging cylinder rod; 18. Engaging screw; 19. Rotating top contact cylinder; 20. Internal restricting seat; 21. Outer ring frame; 2 2. Inner ring frame; 23. Center engagement rod; 24. End rotating handle; 25. Sliding rod seat; 26. Drive toothed plate; 27. Restricting toothed plate; 28. First connecting support rod; 29. ​​Rotating grip; 30. Additional connecting block; 31. Folding sliding block; 32. Spring limiting rod; 33. Small sliding seat; 34. Flexible pad; 35. Bottom toothed cylinder; 36. Restricting arc block; 37. Pulling rod; 38. Restricting protrusion; 39. Slide groove top groove; 40. Rotating support rod; 41. Sliding support plate. Detailed Implementation

[0015] 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.

[0016] Example 1: Please refer to Figures 1 to 9 A multi-stage limiting and locking mechanism for automotive aluminum trim parts, comprising: Mounting main component 1, which forms the base of the entire device, has a cover plate sub-component 2 on one side surface. A connecting shaft 7 is provided at the connection between mounting main component 1 and cover plate sub-component 2. Multiple fixing holes 5 are also provided on one side surface of mounting main component 1. Fixing blocks 8, which mate with the fixing holes 5, are provided on the side surface of cover plate sub-component 2 adjacent to mounting main component 1. When cover plate sub-component 2 is closed, fixing blocks 8 are precisely inserted into the fixing holes 5 on the surface of mounting main component 1, forming a reliable snap-fit ​​sealing structure to prevent dust and moisture from entering the interior. An installation assembly is also provided inside mounting main component 1. The installation assembly includes limiting components and locking components. The limiting components include multiple limiting slides 4, all located inside mounting main component 1. Each limiting slide 4 has a circular hole at one end. A slidable sliding main cylinder 6 is located at the center of the limiting slide 4. Multiple sliding protrusions 14 are provided on the surface of the sliding main cylinder 6. Sliding grooves that mate with the sliding protrusions 14 are provided on the inner side surface of the limiting slide 4. A top extension probe 3 is provided on one side surface of the sliding main cylinder 6. The top extension probe 3 is fixedly connected to the front end of the sliding main cylinder 6, facilitating smooth insertion into the pre-drilled hole in the sheet metal. An end connecting plate 9 is provided at the center of one end of the top extension probe 3. Multiple lifting frame bars 10 are provided on the surface of the top extension probe 3. A limiting side groove 13 that mates with the lifting frame bars 10 is also provided at one end of the sliding main cylinder 6. The lifting frame bars 10 can move up and down along the limiting side groove 13 at the end of the sliding main cylinder 6. The upper surface of the lifting frame 10 is provided with a cushioning pad 12. A horizontal groove is also provided on the upper surface of the lifting frame 10. A small sliding seat 33 is provided inside the horizontal groove. A rotating rod is provided at the center of the small sliding seat 33. A rotating locking rod 11 is provided on the upper surface of the rotating rod. A flexible pad 34 is provided on one side surface of the rotating locking rod 11. A bottom toothed cylinder 35 is provided on the bottom surface of the rotating rod. An inclined block is provided on the bottom surface of the lifting frame 10. A central engaging rod 23 is provided on one side surface of the end connecting plate 9. An end rotating handle 24 is provided at one end of the central engaging rod 23. A sliding rod seat 25 is engaged on the surface of the central engaging rod 23. The sliding rod seats 25 are distributed in a star-shaped radial pattern. A roller is installed at the end of each support rod through a pin. An axial opening is provided at the center of each support rod. The device has a through square hole, inside which is a drive tooth plate 26. Each drive tooth plate 26 has a first connecting rod 28 on one side surface. The end of the first connecting rod 28, connected to the drive tooth plate 26, is equipped with an inner ring frame 22. One end of the inner ring frame 22 is equipped with an additional connecting block 30. One side surface of the additional connecting block 30 is equipped with multiple stacking sliding blocks 31, which are stacked vertically. One side surface of the bottommost stacking sliding block 31 is equipped with a limiting protrusion 38. One side surface of the additional connecting block 30 is equipped with a side groove that mates with the limiting protrusion 38. The upper surface of the additional connecting block 30 is also equipped with a spring limiting rod 32 that mates with the limiting protrusion 38. Except for the bottommost stacking sliding block 31...Each of the other stacking sliding blocks 31 has a rotatable support rod 40 at its center and a slidable sliding support plate 41 on its bottom surface. Except for the uppermost stacking sliding block 31, the surfaces of the other stacking sliding blocks 31 are provided with sliding grooves 39 to facilitate the sliding of the uppermost stacking sliding block 31. A pull rod 37 is provided at one end of the uppermost stacking sliding block 31. In this solution, the operator can install the device at the sheet metal opening of the vehicle window using the mounting components. Disassembly is quick and easy when needed. During use, the operator first rotates the cover plate sub-part 2 along the connecting shaft 7 at the connection point with the main mounting part 1, exposing the interior of the main mounting part 1. Then, the operator slides the sliding main cylinder 6 at the center of the limiting slide block 4, completely removing the extension probe 3 from the interior of the main mounting part 1. The extension probe 3 is then inserted into the pre-drilled sheet metal hole on the surface of the sheet metal part at the vehicle window. After multiple extension probes 3 are fully inserted into the sheet metal hole, the main mounting part 1 is roughly fixed. Subsequently, the operator... The operator grasps the pull rod 37 on the side surface of the folding sliding block 31, fully stretching out the multiple folding sliding blocks 31. Then, the spring limiting rod 32 is pulled upwards, and the lowest folding sliding block 31 is lowered after reaching its farthest position. The spring limiting rod 32 is used to fix the lowest folding sliding block 31, and the rotating support rod 40 at the center of the three upper folding sliding blocks 31 is rotated downwards by 90 degrees. Then, the sliding support plate 41 on the bottom surface of the folding sliding block 31 is pushed towards the rotating support rod 40, locking the rotating support rod 40. At this point, the four folding sliding blocks 31 form a fixed long pull rod. Subsequently, the operator rotates the end rotating handle 24 to drive the central engaging rod 23. The slide bar 25 rotates, and through the meshing effect between the central meshing rod 23 and the slide bar seat 25, it moves towards the end connecting plate 9. During this process, the rollers at the ends of each support rod of the slide bar 25 contact the inclined blocks on the bottom surface of the lifting frame bar 10, causing each lifting frame bar 10 to be pushed outward during the movement of the slide bar 25. When the slide bar 25 moves to the front rotating latch 11, which has completely passed through the sheet metal hole and reached the other end of the hole, the operator pushes the folding slide block 31 inward, causing the drive tooth plate 26 to pass through the square hole in the center of the slide bar 25. Through the meshing effect between one side of its surface and the bottom tooth cylinder 35, the drive tooth plate 26 rotates. When the lever 11 rotates, and the drive tooth plate 26 moves to its limit position, the rotating lever 11 also rotates 90 degrees, so that the flexible pad 34 on one side of its surface faces the sheet metal hole. At this time, the rotating lever 11 cannot pass through the sheet metal hole again due to the size limitation of the hole. The device can be installed inside the sheet metal hole by rotating the lever 11 and will not come off. If the device needs to be removed, after installation, after opening the cover plate sub-part 2, after canceling the locking effect on the drive tooth plate 26, the position of the rotating lever 11 can be adjusted back by pulling the folding sliding block 31 in the opposite direction. At this time, the rotating lever 11 can pass through the inside of the sheet metal hole, so that the device can be quickly removed.

[0017] The locking components include: a clamping ring plate 16, which is fitted onto the side surface of the sliding main cylinder 6 near the outer side of the sheet metal part, for directly abutting the outer surface of the sheet metal part and uniformly transmitting the locking force to the vehicle body; two engaging cylinder rods 17 are provided on one side surface of the clamping ring plate 16; a circular hole is provided on one side surface of the sliding main cylinder 6 to facilitate the passage of the engaging cylinder rods 17; one end of the engaging cylinder rod 17 is engaged with an engaging screw 18; a rotating top contact cylinder 19 is provided at the end of the engaging screw 18 opposite to the engaging cylinder rod 17; a force-bearing top plate 15 is also provided at one end of the sliding main cylinder 6; and a sliding rod seat 2. Each support rod of 5 has a square hole in which a limiting tooth plate 27 is provided. The limiting tooth plate 27 is arranged side by side with the drive tooth plate 26. A second connecting support rod is provided at one end of each limiting tooth plate 27. An outer ring frame 21 is provided at the end of the second connecting support rod connected to the limiting tooth plate 27. The outer ring frame 21 serves as the control center for locking. A rotating handle 29 that is easy to flick with a finger is fixed on one side surface. A limiting arc block 36 is also provided on the bottom surface of the outer ring frame 21. An internal limiting seat 20 that cooperates with the limiting arc block 36 is also provided on the inner bottom surface of the sliding main cylinder 6. The locking component is used to ensure the overall stability of the equipment by locking key positions after the mounting components are installed and fixed. During use, firstly, after the drive tooth plate 26 has extended and rotated the rotating lever 11, the operator holds the rotating handle 29 on the side surface of the outer ring frame 21 and rotates the outer ring frame 21 slightly above the internal limiting seat 20 inside the sliding main cylinder 6. This locks the drive tooth plate 26 in place by the limiting tooth plate 27. At this point, pulling the folding sliding block 31 will not retract the drive tooth plate 26. Subsequently, the operator can pull the mounting main component 1 outwards so that one side surface of the rotated lever 11 above each lifting frame bar 10 is in contact with the other side surface of the sheet metal hole. At this time, the flexible gasket 34 provides a buffering effect. When each rotating lever 11 is in contact with the inner side surface of the sheet metal part... After the fit is achieved, the operator can grasp the rotating top contact cylinder 19 and push it to one side, causing the clamping ring plate 16 to move towards the rotating lever 11, ultimately making one side surface of the clamping ring plate 16 fit against the outer side surface of the sheet metal part. At this time, by rotating the lever 11 and the clamping ring plate 16, the sheet metal part can be clamped from both ends, forming a more secure fixation effect and locking the position of the rotating lever 11. Subsequently, by rotating the top contact cylinder 19, the operator causes the meshing screw 18 to mesh with the meshing cylinder rod 17, slowly withdrawing from the inside of the meshing cylinder rod 17 until one side surface of the rotating top contact cylinder 19 touches the side surface of the force-bearing top plate 15 and stops. At this time, both ends of the limiting side groove 13 will be subjected to the contact effect of the sheet metal part surface and the side surface of the force-bearing top plate 15, thereby enhancing the stability of the equipment in the installation state.

[0018] The working principle of this invention is: When this mechanism is in operation, the cover plate sub-part 2 is first opened by connecting the rotating shaft 7 to expose the interior of the main mounting part 1. The operator manually pushes the sliding main cylinder 6 to slide along the sliding groove in the limiting slide block 4, so that the top extension probe 3 extends into the sheet metal hole of the car window to complete the rough positioning. Then, the pulling rod 37 is pulled to fully unfold the multi-layer folding sliding block 31, the spring limiting rod 32 is pulled upward and released, and the limiting protrusion 38 of the bottom folding sliding block 31 is locked using it. Then, the upper rotating support rod 40 is rotated down 90 degrees and the sliding support plate 41 is pushed to lock, forming a rigid long Pull the rod, then rotate the end of the rotating handle 24 to drive the center meshing rod 23 to rotate, which drives the sliding rod seat 25 to move towards the end connecting plate 9. The roller at the end of the support rod of the sliding rod seat 25 presses the inclined block on the bottom surface of the lifting frame bar 10, forcing the lifting frame bar 10 to be pushed out radially along the limiting side groove 13. After the rotating clamp rod 11 passes through the sheet metal hole, it pushes the folding sliding block 31 inward, so that the driving tooth plate 26 passes through the square hole of the sliding rod seat 25 and meshes with the bottom tooth cylinder 35, driving the rotating clamp rod 11 to rotate ninety degrees. Its flexible pad 34 abuts against the end of the hole to prevent it from falling off. During the locking phase, the operator rotates the handle 29 to drive the outer ring frame 21, causing the limiting arc block 36 to rotate on the inner limiting seat 20. The limiting tooth plate 27 locks the drive tooth plate 26 to prevent reverse movement. Finally, the operator pushes the rotating top contact cylinder 19 to drive the clamping ring plate 16 to adhere to the outside of the sheet metal part. Then, the operator rotates the rotating top contact cylinder 19 to make the engagement screw 18 unscrew from the engagement cylinder rod 17 until it is pressed against the force-bearing top plate 15. The rotating clamping rod 11 and the clamping ring plate 16 form a bidirectional clamping of the sheet metal hole. The pre-tightening force is transmitted through the limiting side groove 13 to complete the high-strength fixation. When disassembling, the operator can quickly release the lock by reversing the operation.

[0019] 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. A multi-stage limiting and locking mechanism for automotive aluminum trim parts, characterized in that, include: The main mounting component (1) is further provided with an mounting assembly inside the main mounting component (1). The mounting assembly includes a limiting component and a locking component. The limiting component includes: multiple limiting slides (4). The multiple limiting slides (4) are all provided inside the main mounting component (1). One end of the limiting slide (4) is provided with a circular hole. A sliding main cylinder (6) is provided at the center of the limiting slide (4). Multiple sliding protrusions (14) are provided on the surface of the sliding main cylinder (6). A sliding groove that cooperates with the sliding protrusions (14) is provided on the inner side surface of the limiting slide (4). A top extension probe (3) is provided on one side surface of the sliding main cylinder (6). An end connecting plate (9) is provided at the center of one end of the top extension probe (3). Multiple lifting frame bars (10) are provided on the surface of the top extension probe (3). The locking component includes: a clamping ring plate (16), which is disposed on one side surface of the sliding main cylinder (6). Two meshing cylinder rods (17) are disposed on one side surface of the clamping ring plate (16). A circular hole is opened on one side surface of the sliding main cylinder (6) to facilitate the passage of the meshing cylinder rods (17). One end of the meshing cylinder rod (17) is engaged with a meshing screw (18). A rotating top contact cylinder (19) is disposed at the end of the meshing screw (18) opposite to the meshing cylinder rod (17). One end of the sliding main cylinder (6) is also provided with a limiting side groove (13) that cooperates with the lifting frame bar (10). The upper surface of the lifting frame bar (10) is provided with a buffer soft pad (12). The upper surface of the lifting frame bar (10) is also provided with a horizontal groove. A small sliding seat (33) is provided inside the horizontal groove. A rotating rod is provided at the center of the small sliding seat (33). A rotating clamp (11) is provided on the upper surface of the rotating rod. A flexible pad (34) is provided on one side surface of the rotating clamp (11). The bottom surface of the rotating rod is provided with a bottom toothed cylinder (35), the bottom surface of the lifting frame bar (10) is provided with an inclined block, one side surface of the end connecting plate (9) is provided with a central meshing rod (23), one end of the central meshing rod (23) is provided with an end rotating handle (24), the surface of the central meshing rod (23) is engaged with a sliding rod seat (25), and each support rod of the sliding rod seat (25) is provided with a roller at its end; The sliding main cylinder (6) is also provided with a force-bearing top plate (15) at one end relative to the limiting side groove (13), and one side surface of the rotating top contact cylinder (19) is in contact with the force-bearing top plate (15).

2. The multi-stage limiting and locking mechanism for automotive aluminum trim parts according to claim 1, characterized in that: Each support rod of the sliding rod seat (25) has a square hole at its center. A drive tooth plate (26) is provided inside the square hole. A first connecting support rod (28) is provided on one side surface of each drive tooth plate (26). An inner ring frame (22) is provided at the end of the first connecting support rod (28) connected to the drive tooth plate (26). An additional connecting block (30) is provided at one end of the inner ring frame (22). A plurality of folding sliding blocks (31) are provided on one side surface of the additional connecting block (30).

3. The multi-stage limiting and locking mechanism for automotive aluminum trim parts according to claim 2, characterized in that: Multiple stacking sliding blocks (31) are installed in a stacked manner. The bottom stacking sliding block (31) has a limiting protrusion (38) on one side surface. The additional connecting block (30) has a side groove that cooperates with the limiting protrusion (38) on one side surface. The upper surface of the additional connecting block (30) also has a spring limiting rod (32) that cooperates with the limiting protrusion (38). Except for the bottom stacking sliding block (31), each of the other stacking sliding blocks (31) has a rotatable rotating support rod (40) at its center and a slidable sliding support plate (41) on its bottom surface. Except for the top stacking sliding block (31), each of the other stacking sliding blocks (31) has a top groove (39) on its surface to facilitate the sliding of the top stacking sliding block (31). One end of the top stacking sliding block (31) has a pulling rod (37).

4. The multi-stage limiting and locking mechanism for automotive aluminum trim parts according to claim 3, characterized in that: A limiting toothed plate (27) is also provided inside the square hole at the center of each support of the sliding rod seat (25). A second connecting support is provided at one end of each limiting toothed plate (27), and an outer ring frame (21) is provided at the end of the second connecting support connected to the limiting toothed plate (27).

5. The multi-stage limiting and locking mechanism for automotive aluminum trim parts according to claim 4, characterized in that: A rotating handle (29) is provided on one side surface of the outer ring frame (21), and a limiting arc block (36) is provided on the bottom surface of the outer ring frame (21). An internal limiting seat (20) that cooperates with the limiting arc block (36) is also provided on the inner bottom surface of the sliding main cylinder (6).

6. The multi-stage limiting and locking mechanism for automotive aluminum trim parts according to claim 1, characterized in that: A cover plate sub-part (2) is provided on one side surface of the main mounting component (1), and a connecting shaft (7) is provided at the connection between the main mounting component (1) and the cover plate sub-part (2). A plurality of fixing holes (5) are also provided on one side surface of the main mounting component (1), and a fixing block (8) that cooperates with the fixing holes (5) is provided on the side surface of the cover plate sub-part (2) that is close to the main mounting component (1).

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