A fixing device for a radiator grille connecting plate of an automobile

Abstract

The utility model discloses a kind of automobile radiator grille connecting plate fixing devices, including fixed base, connecting plate, bearing plate and quick-mounting buckle assembly;Quick-mounting buckle assembly is equipped with elastic hook head, torsion spring and L type clasp, after inserting fixed base, it is automatically locked, and it can be unlocked by pressing, realize unilateral quick assembly and disassembly;Fixed base and bearing plate are formed double mechanical limit by tenon and mortise, fixed clamping column and slot, effectively prevent axial outfall;Connecting interface is equipped with rubber or silica gel buffer pad, for absorbing vibration, reducing abnormal sound and compensating thermal expansion and contraction deformation;Key components are integrally injection molded using engineering plastics, lightweight and low cost.The device compact structure, reliable connection, maintenance is convenient, solve the traditional buckle easy to loosen, bolt difficult to disassemble, rigid connection abnormal sound big and other problems, applicable to various passenger car front face assembly, with outstanding novelty, creativity and practicality.

Description

Technical Field

[0001] This utility model belongs to the field of automotive body parts assembly technology, specifically relating to an automotive radiator grille connecting plate fixing device for quickly, securely, and detachably fixing a radiator grille connecting plate to the front of the vehicle body or bumper bracket. It is suitable for the front assembly installation of passenger cars and new energy vehicles, and features simple structure, single-sided operation, shock resistance and reliability, and convenient after-sales maintenance. Background Technology

[0002] Currently, most automotive radiator grilles are connected to the vehicle body using plastic clips or metal bolts. However, these structures are prone to problems such as fatigue fracture of the clips and locking failure under long-term vibration, high and low temperature cycling, or minor collisions, leading to grille loosening or even detachment. While bolted connections offer high strength, they require tightening from the inside of the vehicle body, necessitating the removal of the bumper or fender during maintenance, significantly increasing labor costs and repair time, failing to meet the demands of efficient assembly and convenient after-sales service in modern automobiles. Most existing quick-release devices rely solely on a single elastic locking point for connection, lacking auxiliary positioning or mechanical interlocking structures. During high-speed driving, braking impacts, or low-speed frontal collisions, the connection points are prone to axial displacement or detachment due to instantaneous loads, posing safety hazards. Furthermore, the connection interfaces are mostly rigid contacts, unable to absorb high-frequency vibrations transmitted from the engine compartment, easily causing abnormal noises and affecting the overall NVH (noise, vibration, and harshness) performance of the vehicle.

[0003] Therefore, it is necessary to design a fixing device for the connecting plate of an automotive radiator grille to solve the problems mentioned above. Utility Model Content

[0004] The purpose of this invention is to address the technical problems of existing automotive radiator grille connection structures, such as difficulty in assembly and disassembly, unreliable connections, easy loosening and abnormal noise, lack of buffering, and high maintenance costs. It provides a reasonably structured, easy-to-operate, securely connected, and easily maintainable automotive radiator grille connecting plate fixing device. This device utilizes multiple technologies, including elastic automatic locking, tenon and mortise mechanical limiting, pin-and-groove auxiliary constraint, flexible buffering, and integrated injection molding, to achieve rapid single-sided assembly, multiple anti-detachment protections, and vibration suppression, significantly improving the assembly efficiency, reliability, and NVH performance of the entire vehicle front assembly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A mounting device for a car radiator grille connecting plate includes a mounting base, a connecting plate, a radiator grille, a support plate, and a quick-release buckle assembly mounted on the support plate. The mounting base is pre-installed on the front bulkhead or bumper bracket of the vehicle body and has an mounting slot for accommodating the quick-release buckle assembly. The support plate is fixedly mounted on the back of the connecting plate of the radiator grille and forms a detachable fixed connection with the mounting base via the quick-release buckle assembly. The quick-release buckle assembly is detachably mounted on the support plate and engages with the mounting base via a built-in elastic locking mechanism, allowing for tool-free installation and removal.

[0006] Furthermore, the quick-release buckle assembly includes a flexible hook, a torsion spring, and an L-shaped hook. One end of the flexible hook is fixedly connected to the torsion spring, while the other end is a deformable hook-shaped structure. The L-shaped hook is mounted on the connecting plate and cooperates with the flexible hook to form a locking pair. When the quick-release buckle assembly is inserted into the mounting slot of the fixing base, the flexible hook is compressed and retracts inward. After passing through the slot, it automatically pops out under the action of the torsion spring, hooking onto the inner wall of the fixing base to achieve reliable locking.

[0007] Furthermore, the torsion spring is mounted on the spring column, with its two ends connected to the elastic hook and the support structure inside the bearing plate, respectively, to ensure that the elastic hook is always in the pre-locked position of being ejected outwards when there is no external force, thereby realizing the automatic locking function of "locking upon insertion and unlocking upon pressing".

[0008] Furthermore, to prevent axial dislodgement, the fixed base is provided with multiple mortises, and the bearing plate is correspondingly provided with tenons. When the connection is completed, the tenons are embedded in the mortises, forming the first layer of mechanical restraint, effectively resisting longitudinal vibration and impact loads.

[0009] Furthermore, the fixed base is equipped with a slot, and the connecting plate has matching fixing posts. After assembly, the fixing posts snap into the slots, forming a second layer of anti-detachment constraint, which works in conjunction with the mortise and tenon structure to significantly improve the overall connection stability.

[0010] Furthermore, a buffer pad is provided between the fixed base and the connecting plate. The buffer pad is made of rubber or silicone, which has good elasticity and damping characteristics. It can effectively absorb the high-frequency vibration transmitted from the engine compartment, reduce the risk of abnormal noise, and compensate for the thermal expansion and contraction deformation of materials caused by changes in ambient temperature, thus avoiding structural stress concentration.

[0011] Furthermore, the fixed base, connecting plate, and quick-release buckle assembly are all made of high-strength engineering plastic through one-piece injection molding, which not only achieves lightweight design, but also has excellent corrosion resistance, dimensional stability, and adaptability to mass production, significantly reducing manufacturing and assembly costs.

[0012] In summary, this utility model organically integrates multiple structural innovations to construct a radiator grille connection solution that combines rapid assembly, multiple anti-detachment features, vibration reduction and noise reduction, and platform versatility. It effectively overcomes the technical defects of traditional connection methods, has outstanding novelty, creativity, and industrial applicability, and is suitable for the front-end system assembly of various passenger vehicles and new energy vehicles, with broad market application prospects.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this utility model, the following effects can be achieved by setting a fixing device for a car radiator grille connecting plate: 1. The quick-release buckle assembly automatically pops out and snaps into the fixing base under the action of a torsion spring, completing the locking; during disassembly, it can be released simply by pressing, without tools or double-sided operation, greatly improving the assembly efficiency of the production line and the convenience of after-sales maintenance, effectively solving the pain point of "difficult to disassemble and install" of traditional bolt or single buckle structures; 2. The tenon on the bearing plate is embedded in the mortise of the fixing base, providing mechanical interlocking on the basis of quick-release buckle locking, effectively resisting longitudinal vibration and impact load, avoiding the overall detachment caused by the failure of a single elastic locking point, and significantly improving the connection reliability; 3. The fixing pin on the connecting plate is inserted into the slot of the fixing base, forming a... The system features dual lateral and axial limiting to further prevent the connecting components from shifting or loosening under complex working conditions, constructing a triple protection system of "elastic locking + tenon and mortise limiting + slot constraint"; 4. A buffer pad made of rubber or silicone is set between the fixed base and the connecting plate, which can effectively absorb the vibration energy of the engine compartment and reduce the risk of abnormal noise; at the same time, the flexible material can adapt to the material expansion differences at different temperatures, avoiding structural cracking or fit failure caused by thermal stress; 5. The fixed base, connecting plate and quick-release buckle assembly are all made of high-strength engineering plastics (such as PA66+GF) by injection molding, which is not only lightweight and corrosion resistant, but also has low mold cost and high production efficiency, making it suitable for mass vehicle platform applications and in line with the trend of automotive lightweighting and green manufacturing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This utility model Figure 1 A schematic diagram of the disassembled 3D structure; Figure 3 This is a three-dimensional structural diagram of the connecting plate of this utility model; Figure 4 This is a three-dimensional structural diagram of the fixed base and quick-release buckle assembly of this utility model; Figure 5 This utility model Figure 2 A schematic diagram of the planar structure.

[0015] In the diagram: 1. Fixed base; 2. Connecting plate; 3. Radiator grille; 4. Bearing plate; 5. Quick-release buckle assembly; 6. Spring post; 7. Mortise; 8. Tenon; 9. Slot; 10. Fixed post; 51. Elastic hook; 52. Torsion spring; 53. L-shaped hook. Detailed Implementation

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

[0017] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0018] Example 1 Please see Figure 1 This embodiment provides a fixing device for a car radiator grille connecting plate, including a fixing base 1, a connecting plate 2, a radiator grille 3, a support plate 4, and a quick-release buckle assembly 5 mounted on the support plate 4. The fixing base 1 is pre-installed on the front bulkhead or bumper bracket of the vehicle body, and has an installation slot for accommodating the quick-release buckle assembly 5; the support plate 4 is fixedly installed on the back of the connecting plate 2 of the radiator grille 3, and is detachably fixedly connected to the fixing base 1 through the quick-release buckle assembly 5. The quick-release buckle assembly 5 is detachably installed on the support plate 4, and is locked to the fixing base 1 by a built-in elastic locking mechanism, allowing for quick assembly and disassembly on one side without tools; The quick-release buckle assembly 5 includes an elastic hook 51, a torsion spring 52, and an L-shaped hook 53. One end of the elastic hook 51 is fixedly connected to the torsion spring 52, and the other end is a deformable hook structure. The L-shaped hook 53 is disposed on the connecting plate 2 and cooperates with the elastic hook 51 to form a locking pair. When the quick-release buckle assembly 5 is inserted into the mounting slot of the fixing base 1, the elastic hook 51 is compressed and retracts inward. After passing the edge of the slot, it automatically pops out under the restoring force of the torsion spring 52, hooking onto the inner wall of the fixing base 1 to achieve reliable locking and prevent accidental disengagement.

[0019] Example 2 Please see Figure 3 as well as Figure 4This embodiment, based on Embodiment 1, further defines the installation method of the torsion spring 52 and its support for the automatic locking function. The torsion spring 52 is mounted on the spring post 6, with one end connected to the elastic hook 51 and the other end connected to the support structure inside the bearing plate 4. This structure ensures that the elastic hook 51 is always in a pre-locked state of being extended outward when not subjected to external force. When the user presses the elastic hook 51 to disassemble, the torsion spring 52 is compressed and stores energy; upon release, it immediately drives the elastic hook 51 to reset, realizing an automated operation of "locking upon insertion and unlocking upon pressing," significantly improving assembly efficiency and user experience.

[0020] Example 3 Please see Figure 3 as well as Figure 4 Based on Embodiment 1, this embodiment further specifies that the fixed base 1 is provided with multiple mortises 7, and the bearing plate 4 is provided with corresponding tenons 8. When the connecting plate 2 and the fixed base 1 are initially connected by the quick-release buckle assembly 5, the tenons 8 are simultaneously embedded into the mortises 7, forming the first mechanical limit, effectively preventing axial disengagement caused by vehicle vibration, braking impact or thermal deformation, and making up for the shortcomings of the single elastic locking structure.

[0021] Example 4 Please see Figure 2 as well as Figure 3 This embodiment, based on embodiment 1, further specifies that the fixed base 1 is provided with a slot 9, and the connecting plate 2 is provided with a matching fixed pin 10. After assembly, the fixed pin 10 is engaged in the slot 9, forming a second layer of anti-detachment constraint. This structure works in conjunction with the tenon and mortise limit to form a triple protection system of "elastic locking + tenon and mortise limit + pin and slot", which significantly improves the connection strength and impact resistance, and is suitable for long-term use under high-speed driving or complex road conditions.

[0022] Example 5 Please see Figure 5 This embodiment, based on embodiment 1, further specifies the provision of a buffer pad between the fixed base 1 and the connecting plate 2. The buffer pad is made of rubber or silicone, possessing excellent elasticity and damping properties, effectively absorbing high-frequency vibrations transmitted from the engine compartment and reducing resonance noise. Simultaneously, its flexibility compensates for the thermal expansion and contraction differences between metal and plastic components caused by changes in ambient temperature, preventing cracking or loosening of the connection points due to stress concentration and extending service life.

[0023] Example 6 Please see Figure 1This embodiment, based on Embodiment 1, further specifies that the fixing base 1, connecting plate 2, and quick-release buckle assembly 5 are integrally injection molded from high-strength engineering plastics (such as PA66 + 30% glass fiber). This process not only achieves structural lightweighting and reduces the overall vehicle weight, but also possesses excellent corrosion resistance, dimensional stability, and adaptability for mass production. Compared to traditional multi-part assembly methods, the integrated design reduces assembly steps, lowers manufacturing and maintenance costs, and aligns with the platform-based and modular development trend of the automotive industry.

[0024] The working process of this utility model is as follows: When using the automotive radiator grille connecting plate fixing device, the fixing base 1 is pre-installed on the front of the vehicle body or the bumper bracket; the support plate 4 is fixed to the back of the connecting plate 2 of the radiator grille 3, and integrates the quick-release buckle assembly 5, the tenon 8 and the fixing post 10. During assembly, the support plate 4 is aligned with the fixing base 1, and the L-shaped hook 53 guides the quick-release buckle assembly 5 to slide into the installation groove. At the same time, the tenon 8 is aligned with the mortise 7, and the fixing post 10 is aligned with the slot 9, realizing multi-point synchronous guidance and reducing assembly difficulty. After the quick-release buckle assembly 5 is fully inserted, the elastic hook 51 is held in place by the torsion spring 52. Under the action, it automatically pops out and hooks onto the inner wall of the fixed base 1, forming an elastic lock; at this time, the tenon 8 is embedded into the mortise 7, and the fixed pin 10 is inserted into the slot 9, forming a double mechanical anti-detachment constraint. After the connection is completed, the buffer pad set between the fixed base 1 and the connecting plate 2 plays a role in vibration reduction, absorbing high-frequency vibration of the engine compartment and reducing abnormal noise; at the same time, the flexible material compensates for material deformation caused by temperature changes, avoiding structural stress concentration. During maintenance, it is only necessary to press the elastic hook 51 from the grille side to make it detach from the inner wall of the fixed base 1, and the entire bearing plate 4 can be pulled out without disassembling the bumper or using tools, which greatly improves after-sales efficiency.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixing device for a connecting plate of an automotive radiator grille, characterized in that: The device includes a fixed base (1), a connecting plate (2), a radiator grille (3), a support plate (4), and a quick-release buckle assembly (5) mounted on the support plate (4). The fixed base (1) is pre-installed on the front of the vehicle body or the bumper bracket and has an installation slot for accommodating the quick-release buckle assembly (5). The support plate (4) is fixedly installed on the back of the connecting plate (2) of the radiator grille (3) and is fixedly connected to the fixed base (1) through the cooperation of the quick-release buckle assembly (5). The quick-release buckle assembly (5) is detachably installed on the support plate (4) and is locked to the fixed base (1) through an elastic locking mechanism.

2. The automobile radiator grille connecting plate fixing device according to claim 1, characterized in that: The quick-release buckle assembly (5) includes an elastic hook (51), a torsion spring (52) and an L-shaped hook (53). One end of the elastic hook (51) is fixedly connected to the torsion spring (52), and the other end is a deformable hook structure. The L-shaped hook (53) is set on the connecting plate (2) and engages with the L-shaped hook (53) to form a lock.

3. The automobile radiator grille connecting plate fixing device according to claim 2, characterized in that: The torsion spring (52) is mounted on the spring column (6), and its two ends are connected to the elastic hook (51) and the support structure in the bearing plate (4) respectively, so that the elastic hook (51) remains in an outward pop-out state when it is not subjected to external force, so as to realize the automatic locking function.

4. The automobile radiator grille connecting plate fixing device according to claim 1, characterized in that: The fixed base (1) is provided with multiple mortises (7), and the bearing plate (4) is provided with tenons (8) corresponding to the mortises (7). When the connecting plate (2) and the fixed base (1) are connected by a quick-release buckle assembly (5), the tenons (8) are inserted into the mortises (7) to prevent axial dislodgement.

5. The automobile radiator grille connecting plate fixing device according to claim 1, characterized in that: The fixed base (1) is also provided with a slot (9), and the connecting plate (2) is provided with a fixed pin (10) that cooperates with the slot (9) to further prevent the connecting plate (2) and the fixed base (1) from axially dislodging.

6. The automobile radiator grille connecting plate fixing device according to claim 1, characterized in that: A buffer pad is provided between the fixed base (1) and the connecting plate (2). The buffer pad is made of rubber or silicone and is used to absorb vibration, reduce abnormal noise and compensate for thermal expansion and contraction deformation.

7. The automobile radiator grille connecting plate fixing device according to claim 1, characterized in that: The fixed base (1), connecting plate (2) and quick-release buckle assembly (5) are integrally injection molded from engineering plastics, which has the characteristics of being lightweight, corrosion resistant and low cost, and is suitable for mass production.

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