Composite locking connection mechanism for vehicle-mounted aluminum trim part

Abstract

The application discloses a kind of composite locking connection mechanism of vehicle-mounted aluminum ornament, it is related to vehicle-mounted pendant fixing technical field, including self-adapting compression mechanism, clamping base and docking seat, the clamping base includes mounting plate and locating column, the mounting plate and locating column are integrated structure, and locating column is located at the center position of mounting plate;The docking seat includes connecting plate and sleeve.The application adopts air cushion air bag linkage air pressure self-adapting structure, can be according to aluminum ornament actual assembly interference, processing tolerance, installation base surface error and temperature thermal deformation Automatic adjustment compression and exhaust capacity.The greater assembly interference, the more rubber air cushion exhaust capacity, the greater spherical air bag expansion, the stronger reverse bonding tension, can flexibly offset assembly interference, prevent structural damage caused by hard top tight, no rigid stress remains throughout, greatly improve aluminum ornament assembly flatness and assembly qualified rate, adapt to various complex assembly conditions and temperature change conditions.

Description

Technical Field

[0001] This invention relates to the field of vehicle mounting fixture technology, and in particular to a composite locking and connecting mechanism for vehicle aluminum trim parts. Background Technology

[0002] Interior trim panels are part of a vehicle's interior décor, typically used to cover and decorate the vehicle's interior structure, providing a comfortable and aesthetically pleasing driving space. Interior trim panels come in various types, encompassing different materials and design styles to suit diverse vehicle types and consumer needs.

[0003] A search revealed Chinese patent document CN221525284U, which discloses a snap-fit ​​connection device for aluminum interior trim panels in a vehicle, relating to the field of interior trim panel technology. This snap-fit ​​connection device for aluminum interior trim panels includes three interior trim panels: panel one, panel two, and panel three. Each of the three interior trim panels has two snap-fit ​​assemblies on both sides. Each snap-fit ​​assembly includes a sliding groove, a pull plate, a locking post, a limiting plate, a spring, a placement groove, and a movable groove. The pull plate is slidably connected to the inside of the sliding groove, the locking post is fixedly connected to one side of the pull plate, and the limiting plate is fixedly connected to the outside of the locking post. With this snap-fit ​​connection device, pulling the pull plate moves the locking post to both sides, inserting a fixing block into the movable groove, and releasing the pull plate allows the locking post to enter the mounting groove, thus completing the assembly of the safety handrail. The assembly process is relatively simple and easy to operate, and parts are less likely to be lost, preventing additional usage costs due to part loss.

[0004] Based on research and existing technology, it has been found that most aluminum interior trim panels on the market currently use traditional bolt fastening for installation. Generally, bolt positioning holes are made on the outside of the aluminum trim panel, and the bolt heads are used to press and fix the aluminum trim panel to the inner wall of the vehicle. When the overall fit of the aluminum interior trim panel is too large, the assembly gap between the trim panel and the mounting surface of the vehicle is too small, and the two are prone to interference due to rigid clamping. Forcibly tightening the bolts in this situation can easily cause the aluminum trim panel to warp and deform under pressure, generating large internal assembly stress within the panel. This not only causes the bolts to not be properly tightened and results in poor overall flatness of the trim panel, but also easily leads to problems such as loose bolts, shaking and abnormal noises of the trim panel during long-term vehicle operation. In severe cases, it can even cause deformation of the aluminum trim panel or cracking of the holes. Furthermore, excessive compression and fit can cause uneven stress distribution at the bolt holes, further reducing the overall assembly stability and long-term durability of the aluminum interior trim panel. Summary of the Invention

[0005] The purpose of this invention is to provide a composite locking connection mechanism for automotive aluminum trim parts to solve the problems mentioned in the background art.

[0006] The technical solution of the present invention is: a composite locking connection mechanism for automotive aluminum trim, including an adaptive pressing mechanism, a snap-fit ​​base and a docking seat, wherein the snap-fit ​​base includes a mounting plate and a positioning post, the mounting plate and the positioning post are an integral structure, and the positioning post is located at the center of the mounting plate;

[0007] The docking seat includes a connecting plate and a sleeve. The connecting plate and the sleeve are an integral structure. The sleeve is adapted to the positioning post. A snap-fit ​​structure is provided between the sleeve and the positioning post to enable the two to form a snap-fit ​​engagement. A locking mechanism is provided between the snap-fit ​​base and the mating seat to lock the two together. The adaptive clamping mechanism includes a rubber air cushion. A one-way air intake valve is installed on the outside of the rubber air cushion and is connected to it. The rubber air cushion is laid and fixed on the surface of the aluminum interior panel facing the vehicle compartment. The internal air pressure of the rubber air cushion is the same as atmospheric pressure. Multiple spherical airbags connected to the rubber air cushion are fixed on the outside of the rubber air cushion. Multiple through holes are opened on the outer wall of the vehicle compartment. Each spherical airbag passes through each through hole. A one-way exhaust valve is provided between the spherical airbags and the rubber air cushion. Each spherical airbag shares a single air storage structure.

[0008] Preferably, the mounting plate and the connecting plate are provided with multiple positioning holes on their outer sides. Bolts pass through the positioning holes to fix the mounting plate and the connecting plate to the inner wall of the carriage and the aluminum interior panel, respectively.

[0009] Preferably, the snap-fit ​​structure includes multiple hook plates, with a rotating shaft fixed to the non-hook end of each hook plate. Both ends of the rotating shaft are rotatably mounted with fixed cylinders via first bearings. The fixed cylinders are fixed to the connecting plate. A coil spring is provided inside the fixed cylinder, with both ends of the coil spring fixed to the fixed cylinder and the rotating shaft, respectively. A first straight slot is provided on the outer side of the positioning post, and the first straight slot is adapted to the hook of the hook plate.

[0010] Preferably, the locking mechanism includes a hexagon socket head cap screw, the outer side of the connecting plate is provided with a countersunk groove, the bolt body of the hexagon socket head cap screw is rotatably installed in the small hole of the countersunk groove through a second bearing, the outer side of the positioning post is provided with an internal thread hole adapted to the hexagon socket head cap screw, and the hexagon socket head cap screw is installed in the internal thread hole through an external thread.

[0011] Preferably, the locking mechanism further includes a braking structure, which includes a braking block. The outer side of the braking block has an arc surface that can fit with the body of the internal hexagonal bolt. The body of the internal hexagonal bolt has multiple second straight slots parallel to the central axis. The arc surface of the braking block is provided with a straight bar integral with it, and the straight bar is adapted to the second straight slots. The outer side of the positioning post has a through opening, and the outer side of the sleeve has a recess adapted to the through opening. The interior of the through opening is provided with a guide structure that allows the braking block to move linearly.

[0012] Preferably, the guide structure includes a square rod, a first return spring, a force-bearing column, and a positioning cylinder. The air storage structure can apply a pushing force to the force-bearing column. One end of the square rod is slidably inserted into the through-hole and is fixed to the brake block. One end of the positioning cylinder is fixed to the positioning column and is aligned with the through-hole. The other end of the square rod is fixed to the force-bearing column and is slidably inserted into the positioning cylinder. The first return spring is sleeved on the square rod, and both ends of the first return spring are in contact with the positioning column and the force-bearing column, respectively.

[0013] Preferably, the gas storage structure includes a piston cylinder and a piston plate. The piston cylinder is fixed to the inner wall of the carriage, and the piston plate is fixed to the force-bearing column. The piston plate is slidably inserted into the piston cylinder.

[0014] Preferably, the one-way exhaust valve has a first hollowed-out cylinder fixed at one end inside the rubber air cushion, and a second hollowed-out cylinder fixed at one end inside the spherical airbag. A vent pipe is fixed at the top of the second hollowed-out cylinder. The vent pipe is sealed and fixed to the spherical airbag, and the vent pipe leads out of the spherical airbag. Multiple brackets are fixed to the inner wall of the carriage, and the multiple brackets are aligned one-to-one with multiple through holes. A connecting pipe is slidably inserted into the outer side of the brackets. An elastic structure is provided on the outer side of the connecting pipe. One end of the vent pipe is conical, and an inner conical hole is opened at one end of the connecting pipe. The vent pipe is inserted into the inner conical hole of the connecting pipe through the conical head. A distributor connected to the piston cylinder is fixed to the outer side of the piston cylinder, and the connecting pipe is connected to the distributor through a flexible hose.

[0015] Preferably, the elastic structure includes multiple flat-head rods and a circular ring plate. The connecting pipe is coaxially fixed with the circular ring plate. The rod body of the flat-head rod is slidably inserted into the bracket. One end of the flat-head rod is fixed to the bottom of the circular ring plate. A second return spring is sleeved on the outer side of the flat-head rod. The two ends of the second return spring are in contact with the flat head of the flat-head rod and the bracket, respectively.

[0016] Preferably, one end of the piston cylinder is fixed with an exhaust pipe, one end of which leads out of the carriage, and an opening and closing valve is installed on the exhaust pipe.

[0017] This invention provides an improved composite locking connection mechanism for automotive aluminum trim components, which, compared to the prior art, has the following improvements and advantages: Firstly, this invention employs an air cushion and airbag linkage pressure adaptive structure, which can automatically adjust the compression and decompression volume according to the actual assembly interference of the aluminum trim panel, processing tolerances, installation base surface errors, and temperature thermal deformation. The greater the assembly interference, the more decompression of the rubber air cushion, the greater the expansion of the spherical airbag, and the stronger the reverse bonding pull, which can flexibly offset assembly interference, eliminate structural damage caused by rigid tightening, and leave no rigid stress residue throughout the process. This significantly improves the flatness and assembly qualification rate of the aluminum trim panel, and is suitable for various complex assembly conditions and temperature change conditions. Secondly, after assembly, the bolt stop brake is automatically triggered by the air pressure storage of the air storage structure, locking the bolt rotation freedom. It can withstand vehicle bumps, start-stop, vibration and inertial impact for a long time, solving the problems of easy loosening and easy falling off of traditional single bolt locking. The connection reliability is far higher than that of conventional connection structures, effectively improving the durability of the whole vehicle interior assembly. Thirdly, the rubber air cushion is directly bonded and fixed to the inside of the aluminum interior trim panel. Its soft texture and sensitive deformation response make it a primary buffer structure for direct vibration. During vehicle operation, minor road bumps, high-frequency engine vibrations, and slight body resonances directly impact the aluminum interior trim panel. The rubber air cushion can quickly undergo slight elastic deformation, instantly absorbing and dissipating the energy of these minor vibrations through the flexible expansion and contraction of its rubber material. Simultaneously, the compressive force generated by these minor vibrations is small enough not to trigger the one-way exhaust valve, keeping the air passage completely sealed. This prevents gas loss from the air cushion, maintaining sufficient flexible buffering margin, effectively filling minor gaps in the assembly, and preventing minor impacts caused by high-frequency vibrations of the aluminum trim panel. This design addresses the drawbacks of traditional solid rubber pads, such as long-term pressure compaction and hardening, buffer failure, and continuous abnormal noise. The spherical airbags and rubber airbags have a constant air volume, with no gas flow. Relying on the elasticity of their own rubber cavity and the compressibility of the sealed gas, they achieve adaptive expansion and contraction buffering, adapting to the vibrations and impacts during vehicle start-stop and driving. The rubber airbags and spherical airbags undergo adaptive compression and rebound deformation synchronously, preventing vibration energy from being directly and rigidly transmitted to the vehicle body. Multiple evenly distributed spherical airbags can achieve multi-point synchronous buffering, ensuring uniform force on the aluminum trim panel and eliminating abnormal noises caused by unilateral vibration and localized loosening. This also compensates for the limited buffering range and uneven force distribution of a single rubber airbag. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the overall perspective three-dimensional structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the spherical airbag of the present invention; Figure 5 This is a three-dimensional structural diagram of the snap-fit ​​base and the mating seat of the present invention; Figure 6 for Figure 5 Perspective view; Figure 7 This is a schematic diagram of the load-bearing column installation structure of the present invention; Figure 8 This is a first-view perspective three-dimensional structural diagram of the snap-fit ​​base of the present invention; Figure 9 This is a two-dimensional structural diagram of the snap-fit ​​base of the present invention from a second perspective; Figure 10 This is a first-view perspective three-dimensional structural diagram of the docking seat of the present invention; Figure 11 This is a two-dimensional structural diagram of the docking seat of the present invention from a second perspective.

[0020] Figure label: 1. Aluminum interior trim panel; 2. Car body; 3. Snap-fit ​​base; 4. Mounting plate; 5. Positioning post; 6. Connecting plate; 7. Sleeve; 8. Rubber air cushion; 9. Spherical airbag; 10. One-way exhaust valve; 11. Hook plate; 12. Rotating shaft; 13. First bearing; 14. First straight groove; 15. Hex socket head cap screw; 16. Internal threaded hole; 17. Brake block; 18. Second straight groove; 19. Straight bar; 20. Through port; 21. Notch; 22. Square rod; 23. First return spring; 24. Positioning cylinder; 25. Force-bearing column; 26. Piston cylinder; 27. Piston plate; 28. First hollow cylinder; 29. ​​Second hollow cylinder; 30. Vent pipe; 31. Connecting pipe; 32. Diverter; 33. Flexible hose; 34. Flat-head rod; 35. Circular plate; 36. Second return spring; 37. Exhaust pipe; 38. On / off valve; 39. One-way intake valve. Detailed Implementation

[0021] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. 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.

[0022] This invention provides an improved composite locking connection mechanism for automotive aluminum trim parts. The technical solution of this invention is as follows: like Figures 1 to 11 As shown, this embodiment of the invention provides a composite locking connection mechanism for automotive aluminum trim, including an adaptive pressing mechanism, a snap-fit ​​base 3 and a docking seat. The snap-fit ​​base 3 includes a mounting plate 4 and a positioning post 5. The mounting plate 4 and the positioning post 5 are an integral structure, and the positioning post 5 is located at the center of the mounting plate 4. It should be noted that the mounting plate 4 and the positioning column 5 are integrally formed, resulting in high overall structural strength and precise coaxiality. This makes it less prone to misalignment during assembly, reducing assembly errors. At the same time, it simplifies the processing flow and reduces the probability of loosening of assembled parts.

[0023] As can be seen from the above, the integrated snap-fit ​​base 3 is directly aligned as a whole, and the central positioning column 5 is used to complete the axial precise positioning, thus quickly completing the pre-installation and positioning of the base.

[0024] The docking seat includes a connecting plate 6 and a sleeve 7. The connecting plate 6 and the sleeve 7 are an integral structure. The sleeve 7 is adapted to the positioning post 5. A snap-fit ​​structure is provided between the sleeve 7 and the positioning post 5 to form a snap-fit ​​engagement. It should be noted that the connecting plate 6 and the sleeve 7 are integrally formed, which has good structural stability and high smoothness of connection. The sleeve 7 and the positioning post 5 are precisely matched to achieve rapid alignment. With the snap-fit ​​structure, rapid pre-fixation can be achieved in the early stage, which improves the assembly efficiency.

[0025] As can be seen from the above, the sleeve 7 of the docking seat is aligned with the positioning post 5 and then sleeved together. The snap-fit ​​structure is used to temporarily snap and limit the two, thus completing the initial assembly and docking.

[0026] A locking mechanism is provided between the snap-fit ​​base 3 and the mating seat to lock the two together; It should be noted that an independent locking mechanism is added to the pre-locking connection to achieve double locking protection, which greatly improves the overall connection tightness and effectively resists the risk of loosening caused by vehicle vibration.

[0027] As can be seen from the above, after the pre-clamping positioning is completed, the locking mechanism is activated to rigidly lock and fix the clamping base 3 and the docking seat, thus completing the main body connection locking.

[0028] The adaptive compression mechanism includes a rubber air cushion 8. A one-way air intake valve 39 is installed on the outside of the rubber air cushion 8 and connected to it. The rubber air cushion 8 is laid and fixed on the surface of the aluminum interior panel 1 facing the vehicle compartment 2. The internal air pressure of the rubber air cushion 8 is the same as the atmospheric pressure. Multiple spherical airbags 9 connected to the rubber air cushion 8 are fixed on the outside of the rubber air cushion 8. Multiple through holes are opened on the outer wall of the vehicle compartment 2. Each spherical airbag 9 passes through each through hole. A one-way exhaust valve 10 is set between the spherical airbag 9 and the rubber air cushion 8. Each spherical airbag 9 shares a single air storage structure.

[0029] It should be noted that the rubber air cushion 8 is installed simultaneously with the aluminum trim panel, and the initial air pressure is the same as the outside air pressure with sufficient compression margin; the one-way air inlet valve 39 can be replenished with air later, and the one-way air outlet valve 10 realizes one-way gas delivery; the spherical airbag 9 has a reasonable external layout with through holes, and can generate reverse tension by inflating and expanding, which can both adaptively compensate for assembly gaps and improve the tightness of trim panel fit, and realize unified air pressure control in conjunction with the air storage structure.

[0030] As can be seen from the above, when the aluminum interior panel 1 is assembled and fitted, the rubber air cushion 8 is squeezed, the air pressure inside the air cushion increases, and the gas flows into the spherical airbag 9 through the one-way exhaust valve 10. The spherical airbag 9 is inflated and expanded, and the excess gas is collected and stored inside the air storage structure.

[0031] Specifically, multiple positioning holes are provided on the outer side of the mounting plate 4 and the connecting plate 6. Bolts pass through the positioning holes to fix the mounting plate 4 and the connecting plate 6 to the inner wall of the carriage 2 and the aluminum interior panel 1, respectively.

[0032] It should be noted that the multiple sets of positioning holes are evenly distributed, resulting in uniform force distribution, firm fixation, and resistance to tilting. The assembly and disassembly operations are simple, and it can be adapted to different mounting surface sizes, making it more versatile.

[0033] As can be seen from the above, by using fastening bolts to penetrate the positioning holes, the snap-fit ​​base 3 is firmly fixed to the inner wall of the carriage 2, and the docking seat is fixed to the inner side of the aluminum interior panel 1, thus completing the pre-installation and fixing of the two sets of base structures.

[0034] Specifically, in conjunction with the appendix Figure 5 and attached Figure 6 As shown, the snap-fit ​​structure includes multiple hook plates 11. A rotating shaft 12 is fixed to the non-hook end of the hook plate 11. Fixed cylinders are rotatably installed at both ends of the rotating shaft 12 through the first bearing 13. The fixed cylinders are fixed to the connecting plate 6. A coil spring is provided inside the fixed cylinder. The two ends of the coil spring are fixed to the fixed cylinder and the rotating shaft 12 respectively. A first straight slot 14 is provided on the outer side of the positioning post 5. The first straight slot 14 is adapted to the hook of the hook plate 11.

[0035] It should be noted that the coil spring can automatically drive the hook plate 11 to rotate and reset, achieving automatic locking without the need for manual fastening; the bearing structure ensures that the hook plate 11 rotates flexibly without jamming, the locking and positioning are precise, and the pre-positioning effect is stable and reliable.

[0036] As can be seen from the above, during the process of sleeve 7 being inserted into positioning post 5, positioning post 5 presses hook head plate 11 to make it rotate outward to avoid it. After being inserted into place, coil spring releases its elastic force to drive hook head plate 11 to rotate and lock into the first straight groove 14, completing the automatic pre-locking limit.

[0037] Specifically, in conjunction with the appendix Figure 10 and attached Figure 11 As shown, the locking mechanism includes a hexagon socket head cap screw 15. A countersunk groove is provided on the outer side of the connecting plate 6. The bolt body of the hexagon socket head cap screw 15 is rotatably installed in the small hole of the countersunk groove through the second bearing. An internal threaded hole 16 that is compatible with the hexagon socket head cap screw 15 is provided on the outer side of the positioning post 5. The hexagon socket head cap screw 15 is installed in the internal threaded hole 16 through the external thread.

[0038] It should be noted that the countersunk groove conceals the bolt structure, preventing exposed bolts from being bumped or scratched; the bearing installation method ensures smooth and unobstructed bolt rotation and locking, and the threaded locking force is controllable, achieving high-strength rigid locking and strong connection stability.

[0039] As can be seen from the above, by using a tool to rotate the internal hex bolt 15, the bolt is fed along the threaded hole, pulling the mating seat and the snap-fit ​​base 3 to fit tightly together, thus completing the overall rigid locking.

[0040] Specifically, in conjunction with the appendix Figure 5 -Appendix Figure 11 As shown, the locking mechanism also includes a braking structure, which includes a braking block 17. The outer side of the braking block 17 is provided with an arc surface that can fit with the body of the internal hexagon bolt 15. The body of the internal hexagon bolt 15 is provided with multiple second straight slots 18 parallel to the central axis. The arc surface of the braking block 17 is provided with a straight bar 19 integral with it, and the straight bar 19 is adapted to the second straight slots 18. The outer side of the positioning post 5 is provided with a through opening 20, and the outer side of the sleeve 7 is provided with a recess 21 adapted to the through opening 20. The interior of the through opening 20 is provided with a guide structure that allows the braking block 17 to move linearly.

[0041] It should be noted that the brake block 17 can be precisely engaged in the bolt slot to brake and limit the bolt after it has been tightened, preventing the bolt from rotating and loosening due to vibration; the linear guide structure ensures that the brake block 17 moves smoothly and is accurately aligned.

[0042] As can be seen from the above, under the action of air pressure thrust, the guide structure drives the brake block 17 to move linearly, so that the straight bar 19 on the brake block 17 is inserted into the second straight groove 18 on the surface of the internal hex bolt 15, thus locking the bolt.

[0043] Specifically, in conjunction with the appendix Figure 5 -Appendix Figure 7 As shown, the guide structure includes a square rod 22, a first return spring 23, a force-bearing column 25, and a positioning cylinder 24. The air storage structure can apply a pushing force to the force-bearing column 25. One end of the square rod 22 is slidably inserted into the through-hole 20 and is fixed to the brake block 17. One end of the positioning cylinder 24 is fixed to the positioning column 5 and is aligned with the through-hole 20. The other end of the square rod 22 is fixed to the force-bearing column 25 and is slidably inserted into the positioning cylinder 24. The first return spring 23 is sleeved on the square rod 22, and both ends of the first return spring 23 are in contact with the positioning column 5 and the force-bearing column 25, respectively.

[0044] It should be noted that the square rod 22 plays a precise guiding role to prevent the brake block 17 from moving or deviating; the first reset spring 23 can automatically drive the structure to reset and separate after the air pressure is removed, realizing automatic unlocking, and the structure has strong linkage.

[0045] As can be seen from the above, the gas storage structure generates thrust to move the force-bearing column 25, which in turn drives the square rod 22 to push the brake block 17 forward to complete the braking and locking; after the air pressure disappears, the first reset spring 23 rebounds and pulls the force-bearing column 25 to reset, which in turn drives the brake block 17 to disengage from the bolt to complete the unlocking.

[0046] Specifically, in conjunction with the appendix Figure 3 and attached Figure 4 As shown, the gas storage structure includes a piston cylinder 26 and a piston plate 27. The piston cylinder 26 is fixed to the inner wall of the carriage 2, and the piston plate 27 is fixed to the force-bearing column 25. The piston plate 27 is slidably inserted into the piston cylinder 26.

[0047] It should be noted that the piston cylinder 26 has excellent sealing performance, can stably store the gas discharged from the airbag, and can convert the pressure potential energy into linear mechanical thrust, realizing the linkage between the air circuit structure and the locking and braking structure, resulting in good automated linkage effect.

[0048] As can be seen from the above, the gas collected by each spherical airbag 9 enters the piston cylinder 26, the gas pressure inside the cylinder increases and pushes the piston plate 27 to slide, the piston plate 27 synchronously drives the force column 25 to move, and outputs a stable thrust to drive the braking structure to operate.

[0049] Specifically, in conjunction with the appendix Figure 4As shown, a first perforated cylinder 28 is fixed to one end of the one-way exhaust valve 10 inside the rubber air cushion 8, and a second perforated cylinder 29 is fixed to one end of the one-way exhaust valve 10 inside the spherical airbag 9. A vent pipe 30 is fixed to the top of the second perforated cylinder 29. The vent pipe 30 is sealed and fixed to the spherical airbag 9, and the vent pipe 30 leads out of the spherical airbag 9. Multiple brackets are fixed to the inner wall of the carriage 2. The multiple brackets are aligned one-to-one with multiple through holes. A connecting pipe 31 is slidably inserted into the outer side of the bracket. An elastic structure is provided on the outer side of the connecting pipe 31. One end of the vent pipe 30 is conical and connected to... One end of the connecting pipe 31 has an inner conical hole. The vent pipe 30 is inserted into the inner conical hole of the connecting pipe 31 through the conical head. The piston cylinder 26 is fixed to the outside and connected to the distributor 32. The connecting pipe 31 is connected to the distributor 32 through the flexible hose 33. The elastic structure includes multiple flat-head rods 34 and a circular plate 35. The connecting pipe 31 and the circular plate 35 are fixed coaxially. The rod body of the flat-head rod 34 is slidably inserted into the bracket. A second return spring 36 is sleeved on the outside of the flat-head rod 34. The two ends of the second return spring 36 are in contact with the flat head of the flat-head rod 34 and the bracket, respectively.

[0050] It should be noted that the hollow cylinder ensures smooth gas flow and is less prone to airflow blockage; the conical face-to-face gas path insertion has strong sealing performance and fast and accurate docking; the flexible structure can realize automatic fitting, docking and separation of pipelines; the distributor 32 realizes unified collection and transportation of multiple gas paths; the gas path layout is neat and the gas pressure delivery is uniform and stable.

[0051] As can be seen from the above, after the aluminum trim panel is properly attached, the outer cone of the spherical airbag 9 automatically inserts into the connecting pipe 31 to complete the air passage connection. The second return spring 36 ensures a tight connection without leakage. The gas inside the airbag flows through the ventilation pipe 30, the connecting pipe 31, and the hose 33 into the distributor 32, and is finally sent into the piston cylinder 26 for storage.

[0052] Specifically, in conjunction with the appendix Figure 2 and attached Figure 3 As shown, one end of the piston cylinder 26 is fixed with an exhaust pipe 37, one end of which leads out of the carriage 2, and an opening and closing valve 38 is installed on the exhaust pipe 37.

[0053] It should be noted that the external exhaust pipe 37 with the on / off valve 38 can freely control the pressure relief operation, and can flexibly adjust the internal air pressure of the air storage structure, which facilitates quick pressure relief and unlocking when disassembling the trim pieces later, making daily maintenance and disassembly very convenient.

[0054] As can be seen from the above, when it is necessary to disassemble the aluminum interior trim, the opening and closing valve 38 is opened to discharge the gas stored inside the piston cylinder 26. The gas pressure inside the cylinder drops rapidly, and the linkage braking structure is automatically unlocked. During daily use, the opening and closing valve 38 is closed to maintain a closed and stable air circuit.

[0055] First, the snap-fit ​​base 3 is fixedly installed on the designated position on the inner wall of the carriage 2 with bolts. Then, the docking seat and the integrated rubber air cushion 8 are fixed together on the inner surface of the vehicle aluminum interior panel 1. At this time, the internal pressure of the rubber air cushion 8 is consistent with the external atmospheric pressure, and the spherical airbag 9 naturally passes through the pre-set through hole on the outer wall of the carriage 2 to complete the initial deployment.

[0056] When assembling and docking the aluminum interior panel 1, the sleeve 7 on one side of the docking seat is aligned with the positioning post 5 at the center of the snap-fit ​​base 3 and nested and inserted. During the insertion process, the positioning post 5 presses the surrounding hook plate 11 to make it rotate outward to avoid it. When the sleeve 7 is fully inserted, the coil spring inside the fixed cylinder releases its elastic potential energy, causing the hook plate 11 to automatically rotate and snap into the first straight groove 14 on the surface of the positioning post 5, thus completing the automatic pre-clamping positioning between the snap-fit ​​base 3 and the docking seat.

[0057] After the pre-positioning is completed, the operator uses a tool to rotate the internal hex bolt 15 inside the countersunk groove. Relying on the thread engagement between the bolt and the internal threaded hole 16 of the positioning post 5, the distance between the mating seat and the snap-fit ​​base 3 is gradually reduced, and the rigid locking and fixing between the two is completed.

[0058] During the bonding and pressing process of the aluminum interior trim panel 1, if the aluminum trim pieces are too tightly bonded or the assembly gap is too small, the outer wall of the vehicle compartment 2 will squeeze the rubber air cushion 8 inward. Under the pressure, the internal cavity volume of the rubber air cushion 8 will decrease, and the internal air pressure will increase accordingly. The high-pressure gas will push open the one-way exhaust valve 10 and flow from the inside of the rubber air cushion 8 into each spherical airbag 9. After the spherical airbag 9 is filled with gas, its overall volume expands and its outer diameter increases. The expanded spherical airbag 9 will press tightly against the inner wall of the through hole of the vehicle compartment 2, thereby generating a reverse pulling force, pulling the rubber air cushion 8 to fit tightly against the outer wall of the vehicle compartment 2, effectively eliminating the hard compression problem caused by the assembly interference, and preventing the aluminum trim panel from warping and deforming under pressure.

[0059] Excess gas inside the spherical airbag 9 is channeled into the distributor 32 via the conical vent pipe 30 and connecting pipe 31, and ultimately all of it is delivered to the gas storage structure inside the piston cylinder 26 for storage. As the gas storage capacity inside the gas storage structure increases, the gas pressure inside the piston cylinder 26 continues to rise. The gas pressure pushes the piston plate 27 to slide smoothly. The piston plate 27 drives the force column 25 to compress the first return spring 23, which in turn pushes the square rod 22 and the brake block 17 forward. This causes the straight bar 19 on the inner side of the brake block 17 to precisely engage with the second straight groove 18 on the surface of the internal hexagon bolt 15, thus mechanically braking the locked internal hexagon bolt 15 to prevent the bolt from loosening due to vibrations during vehicle operation, and further reinforcing the overall connection structure.

[0060] During normal driving, the rubber air cushion 8 absorbs the high-frequency micro-vibrations generated by driving through the spherical airbag 9. The rubber air cushion 8 absorbs the vibrations first by deforming. The spherical airbag 9 buffers and dissipates the vibrations by elastic deformation. The large-amplitude vibrations are damped and dissipated by the pressure stabilization of the gas flow inside the air storage chamber. This achieves comprehensive vibration reduction and noise reduction, reducing interior noise problems.

[0061] When it is necessary to disassemble, replace, or repair the vehicle's aluminum interior trim, simply open the on / off valve 38 on the outer exhaust pipe 37 to discharge the gas stored inside the piston cylinder 26. The internal air pressure of the gas storage structure will drop rapidly, and the thrust of the air pressure on the piston plate 27 will disappear. At this time, the first return spring 23 will return to its original position, causing the force column 25, square rod 22, and brake block 17 to retract synchronously. The brake block 17 will disengage from the hexagon socket bolt 15 to complete automatic unlocking. Then, rotate the hexagon socket bolt 15 in the opposite direction to release the rigid locking. After that, the aluminum interior trim panel 1 can be removed by separating the snap-fit ​​structure. After disassembly, air can be added to the rubber air cushion 8 through the one-way air intake valve 39 to restore the air cushion to its initial normal pressure state, which is convenient for secondary assembly and use.

[0062] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite locking connection mechanism for automotive aluminum trim, comprising an adaptive clamping mechanism, a snap-fit ​​base (3), and a mating seat, characterized in that: The snap-fit ​​base (3) includes a mounting plate (4) and a positioning post (5). The mounting plate (4) and the positioning post (5) are an integral structure, and the positioning post (5) is located at the center of the mounting plate (4). The docking seat includes a connecting plate (6) and a sleeve (7). The connecting plate (6) and the sleeve (7) are an integral structure. The sleeve (7) is adapted to the positioning post (5). A snap-fit ​​structure is provided between the sleeve (7) and the positioning post (5) to enable the two to form a snap-fit ​​engagement. A locking mechanism is provided between the snap-fit ​​base (3) and the mating seat to lock the two together; The adaptive pressing mechanism includes a rubber air cushion (8), and a one-way air inlet valve (39) connected to the outer side of the rubber air cushion (8). The rubber air cushion (8) is laid and fixed on the surface of the aluminum interior panel (1) facing the car body (2). The internal air pressure of the rubber air cushion (8) is the same as the atmospheric pressure. Multiple spherical airbags (9) connected to the rubber air cushion (8) are fixed on the outer side of the rubber air cushion (8). Multiple through holes are opened on the outer wall of the car body (2). Each spherical airbag (9) passes through each through hole. A one-way exhaust valve (10) is provided between the spherical airbag (9) and the rubber air cushion (8). Each spherical airbag (9) shares a common air storage structure.

2. The composite locking connection mechanism for automotive aluminum trim parts according to claim 1, characterized in that: The mounting plate (4) and the connecting plate (6) are provided with multiple positioning holes on their outer sides. Bolts pass through the positioning holes to fix the mounting plate (4) and the connecting plate (6) to the inner wall of the carriage (2) and the aluminum interior panel (1), respectively.

3. The composite locking connection mechanism for automotive aluminum trim parts according to claim 1, characterized in that: The snap-fit ​​structure includes multiple hook plates (11). A rotating shaft (12) is fixed to the non-hook end of the hook plate (11). Both ends of the rotating shaft (12) are rotatably mounted with a fixed cylinder through a first bearing (13). The fixed cylinder is fixed to the connecting plate (6). A coil spring is provided inside the fixed cylinder. Both ends of the coil spring are fixed to the fixed cylinder and the rotating shaft (12) respectively. A first straight slot (14) is opened on the outside of the positioning post (5). The first straight slot (14) is adapted to the hook head of the hook plate (11).

4. The composite locking connection mechanism for automotive aluminum trim parts according to claim 1, characterized in that: The locking mechanism includes an internal hexagonal bolt (15). A countersunk groove is provided on the outer side of the connecting plate (6). The bolt body of the internal hexagonal bolt (15) is rotatably installed in the small hole of the countersunk groove through a second bearing. An internal threaded hole (16) adapted to the internal hexagonal bolt (15) is provided on the outer side of the positioning post (5). The internal hexagonal bolt (15) is installed in the internal threaded hole (16) through external thread.

5. The composite locking connection mechanism for automotive aluminum trim parts according to claim 4, characterized in that: The locking mechanism also includes a braking structure, which includes a braking block (17). The outer side of the braking block (17) is provided with an arc surface that can fit with the body of the internal hexagonal bolt (15). The body of the internal hexagonal bolt (15) is provided with multiple second straight slots (18) parallel to the central axis. The arc surface of the braking block (17) is provided with a straight bar (19) integral with it, and the straight bar (19) is adapted to the second straight slots (18). The outer side of the positioning post (5) is provided with a through opening (20). The outer side of the sleeve (7) is provided with a recess (21) adapted to the through opening (20). The interior of the through opening (20) is provided with a guide structure that allows the braking block (17) to move linearly.

6. The composite locking connection mechanism for automotive aluminum trim parts according to claim 5, characterized in that: The guide structure includes a square rod (22), a first return spring (23), a force-bearing column (25), and a positioning cylinder (24). The air storage structure can apply a pushing force to the force-bearing column (25). One end of the square rod (22) is slidably inserted into the opening (20). The square rod (22) is fixed to the brake block (17). One end of the positioning cylinder (24) is fixed to the positioning column (5), and the positioning cylinder (24) is aligned with the opening (20). The other end of the square rod (22) is fixed to the force-bearing column (25). The force-bearing column (25) is slidably inserted into the positioning cylinder (24). The first return spring (23) is sleeved on the square rod (22). The two ends of the first return spring (23) are in contact with the positioning column (5) and the force-bearing column (25), respectively.

7. The composite locking connection mechanism for automotive aluminum trim parts according to claim 6, characterized in that: The gas storage structure includes a piston cylinder (26) and a piston plate (27). The piston cylinder (26) is fixed to the inner wall of the carriage (2), and the piston plate (27) is fixed to the force-bearing column (25). The piston plate (27) is slidably inserted into the piston cylinder (26).

8. The composite locking connection mechanism for automotive aluminum trim parts according to claim 7, characterized in that: The one-way exhaust valve (10) is fixed with a first hollow cylinder (28) at one end inside the rubber air cushion (8), and a second hollow cylinder (29) is fixed with the other end inside the spherical airbag (9). A vent pipe (30) is fixed to the top of the second hollow cylinder (29). The vent pipe (30) is sealed and fixed to the spherical airbag (9), and the vent pipe (30) leads out of the spherical airbag (9). Multiple brackets are fixed to the inner wall of the carriage (2), and the multiple brackets are connected to multiple The through holes are aligned one-to-one. A connecting pipe (31) is slidably inserted into the outside of the bracket. An elastic structure is provided on the outside of the connecting pipe (31). One end of the vent pipe (30) is conical. One end of the connecting pipe (31) has an inner conical hole. The vent pipe (30) is inserted into the inner conical hole of the connecting pipe (31) through the conical head. A distributor (32) is fixed on the outside of the piston cylinder (26) and connected to it. The connecting pipe (31) is connected to the distributor (32) through the hose (33).

9. A composite locking connection mechanism for automotive aluminum trim parts according to claim 8, characterized in that: The elastic structure includes multiple flat-head rods (34) and a circular plate (35). The connecting pipe (31) is coaxially fixed with the circular plate (35). The rod body of the flat-head rod (34) is slidably inserted into the bracket. One end of the flat-head rod (34) is fixed to the bottom of the circular plate (35). A second return spring (36) is sleeved on the outside of the flat-head rod (34). The two ends of the second return spring (36) are in contact with the flat head of the flat-head rod (34) and the bracket, respectively.

10. A composite locking connection mechanism for automotive aluminum trim parts according to claim 9, characterized in that: One end of the piston cylinder (26) is fixed with an exhaust pipe (37), one end of which leads out of the carriage (2), and an opening and closing valve (38) is installed on the exhaust pipe (37).

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