Composite injection molding bumper of carbon fiber reinforced plastic and metal insert

Abstract

The utility model relates to the technical field of bumpers, and discloses a carbon fiber reinforced plastic and metal insert composite injection molding bumper which comprises a mounting base, an energy absorption box is fixedly connected to one end of the inner wall of the mounting base, fixing plates are fixedly connected to the two sides of the inner wall of the energy absorption box, and fixing rods are fixedly connected to the inner walls of the two sides of the fixing plates. The outer walls of the two ends of the fixing rod are fixedly connected with check blocks, the outer walls of the ends, close to the check blocks, of the fixing rod are sleeved with springs, the output ends of one sides of the springs make contact with the outer walls of one sides of the check blocks, the outer walls of the ends, close to the springs, of the fixing rod are movably sleeved with sliding sleeves, and the output ends of the sides, away from the check blocks, of the springs make contact with the outer walls of one sides of the sliding sleeves. Through mutual cooperation of the structures, the efficient multi-stage buffering energy absorption effect is achieved, kinetic energy can be converted into elastic potential energy during collision, impact force is absorbed in stages, it can be ensured that the buffering process is stable and free of deviation, meanwhile, collision at different angles can be flexibly coped with, and compared with a traditional bumper, the bumper is better in buffering effect. And the vehicle collision safety and the fuel economy are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of bumper technology, specifically to a composite injection-molded bumper made of carbon fiber reinforced plastic and metal inserts. Background Technology

[0002] With the rapid development of the automotive industry, bumpers, as a crucial component for vehicle safety, directly impact the protection of occupants and pedestrians during collisions. Carbon fiber reinforced plastic (CFRP) is a high-performance composite material with carbon fiber as the reinforcement and resin as the matrix, possessing excellent properties such as high strength, high rigidity, and low density. Metal inserts enhance local structural strength and connection reliability. Composite injection-molded bumpers, combining these two elements, not only meet the requirements of lightweight automotive design and reduce overall vehicle energy consumption, but also, thanks to the high strength of CFRP and the stable connection of metal inserts, improve the bumper's energy absorption and buffering capacity during collisions, effectively protecting critical vehicle components and occupants. This represents an important direction for the development of automotive safety and energy-saving technologies.

[0003] Traditional bumper technology has many limitations. Early steel bumpers, while strong, were heavy, increasing fuel consumption and reducing fuel economy, while also hindering vehicle handling. Some bumpers made of ordinary plastic, although lightweight, have poor energy absorption during collisions, failing to effectively disperse and absorb impact energy. This makes them prone to damage in collisions, failing to provide adequate protection for the vehicle's internal structure, and potentially creating sharp parts that could cause secondary injuries to pedestrians. Furthermore, traditional bumpers have a relatively simple structural design, with insufficient collaborative energy absorption capacity among components, making them unable to adequately cope with complex and varied collision scenarios and failing to meet the high safety and comfort standards of modern automobiles. Therefore, we propose a composite injection-molded bumper using carbon fiber reinforced plastic and metal inserts. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a composite injection-molded bumper made of carbon fiber reinforced plastic and metal inserts, which solves the aforementioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts, including a mounting base, an energy-absorbing box fixedly connected to one end of the inner wall of the mounting base, fixing plates fixedly connected to both sides of the inner wall of the energy-absorbing box, fixing rods fixedly connected to the inner walls of both sides of the fixing plates, and stops fixedly connected to the outer walls of both ends of the fixing rods. A spring is sleeved on the outer wall of the fixing rod near the stop, and one output end of the spring contacts the outer wall of one side of the stop. A sliding sleeve is movably sleeved on the outer wall of the fixing rod near the spring, and the output end of the spring away from the stop contacts the outer wall of one side of the sliding sleeve.

[0006] Preferably, the fixing plate is fixedly connected to the inner walls on both sides of the fixing rod with limiting slide rods. The limiting slide rods are parallel to the fixing rod and are located directly below the fixing rod. The bottom output end of the sliding sleeve is movably sleeved on the outer wall of one end of the limiting slide rod.

[0007] Preferably, a connector is fixedly connected to the outer wall of the sliding sleeve on the side away from the spring. The connector is set at an angle of 45°, and a buffer post is fixedly connected to the outer wall of one end of the connector.

[0008] Preferably, the energy-absorbing box has an opening on the outer wall at the end away from the mounting base, and the output end of the buffer column extends to the outer wall of the opening.

[0009] Preferably, side mounting brackets are fixedly connected to both sides of the outer wall of the mounting base, a front cover is fixedly connected to one end of the outer wall of the mounting base, side covers are fixedly connected to both sides of the outer wall of the front cover, and a license plate frame is fixedly connected to the outer wall of the end of the front cover away from the mounting base.

[0010] Preferably, the output end of the buffer column is located between the energy-absorbing box and the front cover.

[0011] Preferably, the side cover is made of carbon fiber reinforced plastic.

[0012] Compared with the prior art, this utility model provides a composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts, which has the following advantages:

[0013] 1. This composite injection-molded bumper, featuring carbon fiber reinforced plastic and metal inserts, differs from traditional bumpers that often use a single material and simple structure, making it difficult to effectively disperse energy during a collision. This device innovatively constructs a multi-stage buffer energy-absorbing mechanical structure, with components such as the fixing plate, fixing rod, spring, and sliding sleeve inside the energy-absorbing box working in close coordination. When the bumper is impacted, the impact force is first transmitted to the buffer post, which drives the sliding sleeve to slide along the fixing rod, simultaneously compressing the spring. The spring converts the impact kinetic energy into elastic potential energy, providing initial buffering; the sliding sleeve, guided by the limiting rod, ensures stable sliding direction, preventing deviation that could lead to buffer failure. Compared to traditional bumpers, this multi-stage buffer structure can absorb and disperse impact force in stages and directions, significantly reducing the impact force experienced by the vehicle at the moment of collision and effectively protecting the main body structure and the safety of passengers.

[0014] 2. This composite injection-molded bumper, featuring carbon fiber reinforced plastic and metal inserts, addresses the issue of uneven force distribution during collisions in traditional bumpers, which can lead to misalignment and jamming, thus affecting cushioning performance. In this device, limiting slide rods on both sides of the fixed plate are parallel to the fixed rod, and the bottom of the sliding sleeve is movably fitted onto the limiting slide rods, forming a precise guiding and limiting mechanical structure. This design ensures that the sliding sleeve maintains a stable trajectory during sliding, preventing displacement or jamming due to lateral forces. Simultaneously, stops at both ends of the fixed rod precisely limit the sliding range of the sleeve, preventing it from deviating from its track. In contrast, traditional bumpers lack this precise guiding and limiting structure, leading to uncontrolled component movement during collisions and significantly reduced cushioning performance. This device, through its precise mechanical structure design, ensures stable operation of the energy-absorbing components under various collision conditions, continuously providing protection.

[0015] 3. Compared to traditional bumpers, which have poor inter-component coordination and struggle to cope with collisions of varying angles and forces, this composite injection-molded bumper employs a modular, collaborative mechanical structure. Components such as the energy-absorbing box, mounting base, and side mounting brackets each perform their specific functions while working closely together. For example, in a frontal collision, the spring-sliding sleeve-buffer column system within the energy-absorbing box fully absorbs energy; in a side collision, the side mounting brackets and side covers work together to disperse the impact force, while the energy-absorbing box also assists in absorbing energy, significantly improving the bumper's adaptability in complex collision scenarios. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a rear view schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the mounting base of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the energy-absorbing box of this utility model.

[0020] In the diagram: 1. Mounting base; 2. Energy-absorbing box; 3. Fixing plate; 4. Fixing rod; 5. Stop block; 6. Spring; 7. Sliding sleeve; 8. Limiting sliding rod; 9. Connector; 10. Buffer column; 11. Opening; 12. Side mounting bracket; 13. Front cover; 14. Side cover; 15. License plate frame. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 A composite injection-molded bumper made of carbon fiber reinforced plastic and metal inserts includes a mounting base 1. An energy-absorbing box 2 is fixedly connected to one end of the inner wall of the mounting base 1. Fixing plates 3 are fixedly connected to both sides of the inner wall of the energy-absorbing box 2. Fixing rods 4 are fixedly connected to the inner walls of both sides of the fixing plates 3. Stop blocks 5 are fixedly connected to the outer walls of both ends of the fixing rods 4. A spring 6 is sleeved on the outer wall of the fixing rod 4 near the stop block 5. One output end of the spring 6 contacts one side of the outer wall of the stop block 5. A sliding sleeve 7 is movably sleeved on the outer wall of the fixing rod 4 near the spring 6. The output end of the spring 6 away from the stop block 5 connects to one side of the outer wall of the sliding sleeve 7. The mounting base 1 serves as the base of the entire bumper. The mounting components provide a stable support and mounting platform for the internal structure, such as the energy-absorbing box 2. The energy-absorbing box 2 is the core structure of the bumper that absorbs impact energy. It converts the impact force through the cooperation of internal components. The fixing plate 3 serves to fix and support the internal components such as the fixing rod 4, ensuring their positional stability. The fixing rod 4 provides a track for the sliding sleeve 7. The stop block 5 limits the sliding range of the sliding sleeve 7 and prevents it from detaching from the fixing rod 4. The spring 6 is compressed and deformed when subjected to impact force, converting the impact energy into elastic potential energy, which plays a buffering role. The sliding sleeve 7 slides on the fixing rod 4, transmitting the impact force and triggering the buffering function of the spring 6.

[0023] Furthermore, the inner walls of the fixed plate 3 near the fixed rod 4 are fixedly connected with limiting slide rods 8. The limiting slide rods 8 are parallel to the fixed rod 4 and are located directly below the fixed rod 4. The bottom output end of the sliding sleeve 7 is movably sleeved on the outer wall of one end of the limiting slide rod 8. The limiting slide rod 8 cooperates with the fixed rod 4 to further restrict the movement trajectory of the sliding sleeve 7, ensuring that the sliding sleeve 7 can only slide along a fixed direction, improving the stability and reliability of the buffering process, preventing the sliding sleeve 7 from shifting or shaking during the sliding process, and ensuring the normal operation of the entire buffer structure.

[0024] Furthermore, a connector 9 is fixedly connected to the outer wall of the sliding sleeve 7 on the side away from the spring 6. The connector 9 is set at an angle of 45°. A buffer post 10 is fixedly connected to the outer wall of one end of the connector 9. The connector 9 is used to connect the sliding sleeve 7 and the buffer post 10. Its 45° angle setting helps to more effectively transfer the force to the buffer post 10 when the sliding sleeve 7 slides, so that the buffer post 10 can better play its buffering role. The buffer post 10 can deform when subjected to impact force, further absorbing impact energy, and working in conjunction with the spring 6 to enhance the buffering and energy absorption effect of the bumper.

[0025] Furthermore, the outer wall of the energy-absorbing box 2 away from the mounting base 1 has an opening 11. One output end of the buffer column 10 extends to one end of the outer wall of the opening 11. The opening 11 provides movement space for the buffer column 10, allowing the buffer column 10 to freely extend and retract within the energy-absorbing box 2. This ensures that the buffer column 10 can smoothly perform buffering action when subjected to impact force, and transmits the impact force to the interior of the energy-absorbing box 2 for absorption and dispersion.

[0026] Furthermore, side mounting brackets 12 are fixedly connected to both sides of the outer wall of the mounting base 1, a front cover 13 is fixedly connected to one end of the outer wall of the mounting base 1, side covers 14 are fixedly connected to both sides of the outer wall of the front cover 13, and a license plate frame 15 is fixedly connected to the outer wall of the end of the front cover 13 away from the mounting base 1. The side mounting brackets 12 are used to securely install the bumper on the vehicle, ensuring a reliable connection between the bumper and the vehicle. The front cover 13 is the front protective structure of the bumper, directly bearing the impact force and transferring the force to the internal energy-absorbing structure. The side covers 14 are made of carbon fiber reinforced plastic, which has the characteristics of high strength and lightweight, protecting the internal structure of the bumper and reducing the overall weight of the bumper, thus improving the vehicle's fuel economy. The license plate frame 15 is used to install the license plate, meeting the vehicle identification requirements.

[0027] Furthermore, the output end of the buffer post 10 is located between the energy-absorbing box 2 and the front cover 13. The buffer post 10 is located between the energy-absorbing box 2 and the front cover 13, which can promptly transfer the impact force received by the front cover 13 to the inside of the energy-absorbing box 2 when an impact occurs. At the same time, it undergoes buffer deformation, prolongs the impact force action time, reduces the peak impact force, and effectively protects the front parts of the vehicle.

[0028] Furthermore, the side cover 14 is made of carbon fiber reinforced plastic. Carbon fiber reinforced plastic has the characteristics of high strength, high rigidity and low density. As the material of the side cover 14, it can significantly reduce the weight of the bumper while ensuring the structural strength and protective performance of the bumper, thereby reducing the vehicle's curb weight, improving vehicle handling performance and fuel economy. In addition, carbon fiber reinforced plastic also has good corrosion resistance, which extends the service life of the bumper.

[0029] Instructions for use

[0030] Structural Description: 1. Mounting base 1: As a basic mounting component, it provides stable support and mounting platform for the internal structure. One end of its inner wall is fixedly connected to the energy-absorbing box 2, the two sides of its outer wall are fixedly connected to the side mounting brackets 12, and one end of its outer wall is fixedly connected to the front cover 13.

[0031] 2. Energy Absorption Box 2: It is the core structure for absorbing impact energy. It converts the impact force through the cooperation of internal components. It is located at one end of the inner wall of the mounting base 1, and an opening 11 is opened on the outer wall of the end away from the mounting base 1.

[0032] 3. Fixing plate 3: It serves to fix and support the internal components such as the fixing rod 4 to ensure their stable position. It is fixed to both sides of the inner wall of the energy absorption box 2.

[0033] 4. Fixed rod 4: Provides a track for the sliding sleeve 7 to slide. It is fixed to the inner walls on both sides of the fixed plate 3. The outer walls at both ends are fixedly connected to the stop blocks 5. The outer wall near the stop block 5 is sleeved with a spring 6. The outer wall near the spring 6 is movably sleeved with the sliding sleeve 7.

[0034] 5. Stop 5: Limits the sliding range of the sliding sleeve 7 to prevent it from detaching from the fixing rod 4, and is fixed to the outer walls at both ends of the fixing rod 4;

[0035] 6. Spring 6: When subjected to impact force, it compresses and deforms to convert the impact energy into elastic potential energy to play a buffering role. It is sleeved on the outer wall of the fixed rod 4 near the stop block 5. One output end is in contact with one side of the outer wall of the stop block 5, and the other output end is in contact with one side of the outer wall of the sliding sleeve 7.

[0036] 7. Sliding sleeve 7: It slides on the fixed rod 4 to transmit the impact force and trigger the buffer function of the spring 6. It is movably sleeved on the outer wall of the fixed rod 4 near the spring 6. The bottom output end is movably sleeved on the outer wall of the limiting sliding rod 8. The connecting head 9 is fixedly connected to the outer wall away from the spring 6.

[0037] 8. Limiting slide bar 8: In cooperation with the fixed rod 4, it further restricts the movement trajectory of the sliding sleeve 7 to ensure a stable and reliable buffering process. It is fixed to the inner walls of the fixed plate 3 near the fixed rod 4 on both sides, parallel to the fixed rod 4 and located directly below it.

[0038] 9. Connector 9: Connects the sliding sleeve 7 and the buffer post 10. Its 45° angled setting helps to more effectively transfer force to the buffer post 10. It is fixed to the outer wall of the sliding sleeve 7 on the side away from the spring 6, and the buffer post 10 is fixedly connected to the outer wall of one end.

[0039] 10. Buffer column 11: It deforms when subjected to impact force to further absorb impact energy. It works with spring 6 to enhance the buffer energy absorption effect. One end is fixed to connector 9, and the other end extends to the outer wall of the opening 11 of energy absorption box 2. The output end is located between energy absorption box 2 and front cover 13.

[0040] 11. Opening 11: Provides movement space for the buffer column 10, ensuring that it can smoothly perform buffering action and transmit the impact force to the interior of the energy absorption box 2. It is opened on the outer wall of the end of the energy absorption box 2 away from the mounting base 1.

[0041] 12. Side mounting bracket 12: Used to securely install the bumper onto the vehicle, ensuring a reliable connection with the vehicle, and fixed to both sides of the outer wall of the mounting base 1;

[0042] 13. Front cover 13: As the front protective structure, it directly bears the impact force and transmits the force to the internal energy-absorbing structure. It is fixed to the outer wall of one end of the mounting base 1, and the side covers 14 are fixedly connected to the outer walls on both sides. The license plate frame 15 is fixedly connected to the outer wall of the end away from the mounting base 1.

[0043] 14. Side cover 14: Made of carbon fiber reinforced plastic, it can protect the internal structure, reduce the overall weight, and improve the vehicle's fuel economy. It is fixed to the outer walls of both sides of the front cover 13.

[0044] 15. License plate frame 15: Used to install license plates to meet vehicle identification requirements, and fixed to the outer wall of the front cover 13 away from the mounting base 1.

[0045] Working principle: When the bumper is impacted, the external force is first applied to the front cover 13, which then transmits the force to the side cover 14 (made of carbon fiber reinforced plastic, which has high strength and a certain degree of toughness), and also to the energy-absorbing box 2. After being subjected to force, the internal structure of the energy-absorbing box 2 begins to function. The cooperation between the fixing rod 4, the limiting slide rod 8, and the sliding sleeve 7 on the fixing plate 3 guides and restricts the movement direction of the sliding sleeve 7. The limiting slide rod 8 is parallel to the fixing rod 4 and located directly below it. The bottom output end of the sliding sleeve 7 is movably fitted onto the limiting slide rod 8, ensuring that the sliding sleeve 7 can only move along the direction of the fixing rod 4 and the limiting slide rod 8. One side of the sliding sleeve 7 is connected to a connector 9, which is angled at 45° and connected to the buffer post 10. When the external force is transmitted to the sliding sleeve 7, the sliding sleeve 7 will slide on the fixing rod 4. During the sliding process, the end of the sliding sleeve 7 closest to the spring 6 compresses the spring 6. After being compressed, the spring 6 converts the external force into elastic potential energy, which plays a buffering role. Meanwhile, the stop block 5 is fixed to both ends of the fixed rod 4, limiting the excessive sliding of the sliding sleeve 7 and preventing the sliding sleeve 7 from detaching from the fixed rod 4. At the same time, one end of the spring 6 is in contact with the stop block 5, and the other end is in contact with the sliding sleeve 7. When the sliding sleeve 7 slides, the spring 6, the sliding sleeve 7, and the stop block 5 work together to achieve the effect of buffering and absorbing energy. One end of the buffer post 10 extends to the opening 11 of the energy absorption box 2, and the other end is connected to the connector 9. When the sliding sleeve 7 slides on the fixed rod 4, it drives the buffer column 10 to move through the connector 9. The buffer column 10 plays a further buffering role between the energy-absorbing box 2 and the front cover 13, dispersing the impact force and reducing damage to the overall structure of the bumper. The side mounting brackets 12 on both sides of the outer wall of the mounting base 1 are used to install the bumper onto the vehicle. The front cover 13, side covers 14, and license plate frame 15 constitute the exterior part of the bumper. When the front cover 13 is subjected to an impact, it transfers the force to the internal energy-absorbing structure, and the license plate frame 15 is used to install the license plate. The entire composite injection molded bumper effectively absorbs and disperses the impact force through the coordinated work of its various structural parts, improving the bumper's buffering and energy-absorbing performance and protecting the safety of vehicles and pedestrians.

[0046] 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 composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts, comprising a mounting base (1), characterized in that: An energy-absorbing box (2) is fixedly connected to one end of the inner wall of the mounting base (1). A fixing plate (3) is fixedly connected to both sides of the inner wall of the energy-absorbing box (2). A fixing rod (4) is fixedly connected to the inner walls of both sides of the fixing plate (3). A stop block (5) is fixedly connected to the outer wall of both ends of the fixing rod (4). A spring (6) is sleeved on the outer wall of the fixing rod (4) near the stop block (5). The output end of the spring (6) is in contact with the outer wall of the stop block (5). A sliding sleeve (7) is movably sleeved on the outer wall of the fixing rod (4) near the spring (6). The output end of the spring (6) away from the stop block (5) is in contact with the outer wall of the sliding sleeve (7).

2. The composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts according to claim 1, characterized in that: The fixing plate (3) is fixedly connected to the inner walls on both sides of the fixing rod (4) by a limiting slide rod (8). The limiting slide rod (8) is parallel to the fixing rod (4) and is located directly below the fixing rod (4). The bottom output end of the sliding sleeve (7) is movably sleeved on the outer wall of one end of the limiting slide rod (8).

3. The composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts according to claim 1, characterized in that: The outer wall of the sliding sleeve (7) away from the spring (6) is fixedly connected to a connector (9), the connector (9) is set at an angle of 45°, and a buffer column (10) is fixedly connected to the outer wall of one end of the connector (9).

4. The composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts according to claim 3, characterized in that: The energy-absorbing box (2) has an opening (11) on the outer wall of the end away from the mounting base (1), and the output end of the buffer column (10) extends to one end of the outer wall of the opening (11).

5. A composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts according to claim 1, characterized in that: Side mounting brackets (12) are fixedly connected to both sides of the outer wall of the mounting base (1), a front cover (13) is fixedly connected to one end of the outer wall of the mounting base (1), side covers (14) are fixedly connected to both sides of the outer wall of the front cover (13), and a license plate frame (15) is fixedly connected to the outer wall of the end of the front cover (13) away from the mounting base (1).

6. A composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts according to claim 3, characterized in that: The output end of the buffer column (10) is located between the energy absorption box (2) and the front cover (13).

7. A composite injection-molded bumper of carbon fiber reinforced plastic and metal inserts according to claim 5, characterized in that: The side cover (14) is made of carbon fiber reinforced plastic.

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