Automobile tailgate structure

Abstract

The utility model belongs to the technical field of automobile parts, more specifically, it relates to a car tail door structure. Including tail door inner plate (1), tail door outer plate (2), tail door inner plate (1) is engineering plastics inner plate, tail door outer plate (2) is engineering plastics outer plate, the inner surface of tail door inner plate (1) is provided with reinforced rib part (3), and the reinforced rib part (3) includes multiple reinforcing ribs (4), the inner surface of tail door outer plate (2) is provided with reinforced rib part (3), and the reinforced rib part (3) includes multiple reinforcing ribs (4), and tail door inner plate (1) and tail door outer plate (2) fixed connection. The car tail door structure of the utility model, simple structure, both realize lightweight design, and have good strength.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and more specifically, relates to a tailgate structure for automobiles. Background Technology

[0002] Traditional car tailgates are mostly made of metal materials (such as steel or aluminum alloys). While these materials offer high strength and rigidity, they are also heavy, hindering lightweight vehicle design and increasing manufacturing costs. As the automotive industry's requirements for lightweighting and environmental protection increase, plastic tailgates are gradually becoming an alternative. However, existing plastic tailgates still have shortcomings in terms of strength, durability, and integrated functionality, making them difficult to directly replace metal tailgates.

[0003] Existing technology includes a designation titled "A Metal Reinforcing Structure for a Plastic Tailgate," with publication number CN214647502U. This technology belongs to the field of plastic tailgate technology and provides a metal reinforcing structure for a plastic tailgate. It includes a tailgate spoiler and an inner tailgate panel, with a metal reinforcing plate positioned between them. An adhesive layer separates the metal reinforcing plate from both the inner and outer tailgate panels. The metal reinforcing plate is bonded to the tailgate spoiler and the inner plastic tailgate panel via the adhesive layer, forming a closed cavity reinforcement area. The advantages of this invention are its good portability; it can be applied to similar automotive products, effectively addressing the high strength and rigidity requirements of many areas of plastic tailgates. Furthermore, it does not affect the appearance and has a low cost.

[0004] However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a car tailgate structure that is simple in structure, achieves both lightweight design and good strength, in order to overcome the shortcomings of the existing technology.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model relates to a tailgate structure for automobiles, comprising an inner tailgate panel and an outer tailgate panel. The inner tailgate panel is made of engineering plastic, and the outer tailgate panel is made of engineering plastic. A reinforcing rib is provided on the inner surface of the inner tailgate panel, and the reinforcing rib includes multiple reinforcing ribs. A reinforcing rib is also provided on the inner surface of the outer tailgate panel, and the reinforcing rib includes multiple reinforcing ribs. The inner tailgate panel and the outer tailgate panel are fixedly connected.

[0008] The tailgate inner panel is made of long fiber reinforced polypropylene material, and the tailgate outer panel is also made of long fiber reinforced polypropylene material.

[0009] The tailgate inner panel has multiple reinforcing ribs forming a grid-like or honeycomb-like reinforcing rib section.

[0010] The tailgate outer panel has multiple reinforcing ribs forming a grid-like or honeycomb-like reinforcing rib section.

[0011] The outer surface of the tailgate outer panel is provided with an ultraviolet protective coating.

[0012] A side groove is provided around the inner edge of the outer surface of the tailgate, and a sealing strip is fitted into the side groove.

[0013] The tailgate inner panel and tailgate outer panel are fixedly connected by a snap-fit ​​and slot structure.

[0014] Both the inner and outer tailgate panels are made of plastic granules through hot melt injection molding.

[0015] The tailgate inner panel and reinforcing rib are integrally injection molded structures, as are the tailgate outer panel and reinforcing rib.

[0016] The inner surface of the tailgate inner panel is fitted with a metal reinforcement, and the inner surface of the tailgate outer panel is fitted with a metal reinforcement.

[0017] The working principle and beneficial effects of this utility model are as follows:

[0018] The tailgate structure described in this utility model no longer uses metal materials to make the tailgate, but instead uses engineering plastics. The tailgate consists of an inner panel and an outer panel, both made of engineering plastics. Engineering plastics are lightweight, and with the addition of reinforcing ribs—multiple reinforcing ribs arranged in a network on the inner surface of the inner panel and the outer panel—the overall weight of the tailgate is reduced by 30%-50% compared to traditional metal tailgates while maintaining strength. This results in excellent impact resistance and weather resistance, effectively balancing lightweight design requirements with strength requirements. Attached Figure Description

[0019] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0020] Figure 1 This is a schematic diagram of the outer structure of the automobile tailgate structure described in this utility model;

[0021] Figure 2 This is a schematic diagram of the inner structure of the automobile tailgate structure described in this utility model;

[0022] Figure 3This is a schematic diagram of the inner surface of the tailgate inner panel of the automobile tailgate structure described in this utility model;

[0023] Figure 4 This is a partial cross-sectional view of the outer panel of the tailgate structure of the automobile tailgate described in this utility model.

[0024] The labels in the attached diagram are as follows: 1. Tailgate inner panel; 2. Tailgate outer panel; 3. Reinforcing rib; 4. Reinforcing rib; 5. UV protective coating; 6. Metal reinforcement; 7. Sealing strip. Detailed Implementation

[0025] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0026] As attached Figure 1 - Appendix Figure 4 As shown, this utility model is a car tailgate structure, including an inner tailgate panel 1 and an outer tailgate panel 2. The inner tailgate panel 1 is an engineering plastic inner panel, and the outer tailgate panel 2 is an engineering plastic outer panel. A reinforcing rib 3, including multiple reinforcing ribs 4, is provided on the inner surface of the inner tailgate panel 1. The inner tailgate panel 1 and the outer tailgate panel 2 are also provided with reinforcing ribs 3, including multiple reinforcing ribs 4. The inner tailgate panel 1 and the outer tailgate panel 2 are fixedly connected. This structure addresses the shortcomings of existing technologies by proposing an improved technical solution. In this structural design, the car tailgate is no longer made of metal but of engineering plastic. The car tailgate consists of an inner tailgate panel and an outer tailgate panel, both made of engineering plastic. Engineering plastics are lightweight, and with the addition of reinforcing ribs 3—that is, reinforcing ribs 3 on the inner surface of the tailgate inner panel 1, each reinforcing rib 4 arranged in a network—and reinforcing ribs 3 on the inner surface of the tailgate outer panel 2, each reinforcing rib 3 also includes multiple reinforcing ribs 4 arranged in a network, the overall weight of the tailgate is reduced while maintaining strength. The total weight of the tailgate is 30%-50% lighter than that of traditional metal tailgates, giving it good impact resistance and weather resistance, effectively balancing lightweight design requirements and strength requirements. The tailgate structure described in this utility model is simple in structure, achieving both lightweight design and good strength.

[0027] The tailgate inner panel 1 is made of long fiber reinforced polypropylene (LFT-PP), and the tailgate outer panel 2 is also made of long fiber reinforced polypropylene (LFT-PP). The selection of materials for the tailgate inner and outer panels, along with the addition of UV-resistant additives and flame retardants to the long fiber reinforced polypropylene (LFT-PP), effectively improves the material's weather resistance and safety.

[0028] The multiple reinforcing ribs 4 of the tailgate inner panel 1 form a grid-like or honeycomb-like reinforcing rib section 3. In this structure, the reinforcing rib section increases the local thickness of the tailgate inner panel 1, while the thickness of other parts can be reduced, achieving weight reduction while ensuring overall bending and torsional resistance.

[0029] The tailgate outer panel 2 has multiple reinforcing ribs 4 forming a grid-like or honeycomb-like reinforcing rib section 3. This structure increases the local thickness of the tailgate outer panel 2 while reducing the thickness of other parts, achieving weight reduction while ensuring overall bending and torsional resistance.

[0030] The outer surface of the tailgate outer panel 2 is provided with an ultraviolet protective coating 5. In the above structure, the outer surface of the tailgate outer panel 2 is coated with an anti-ultraviolet material to improve its aging resistance.

[0031] A groove is provided around the inner edge of the tailgate outer panel 2, and a sealing strip 7 is fitted into the groove. In this structure, the sealing strip 7 protrudes from the groove, ensuring waterproof, dustproof, and soundproof performance when the tailgate is closed. Two sealing strips 7 can also be provided as needed to optimize performance.

[0032] The inner tailgate panel 1 and the outer tailgate panel 2 are fixedly connected by a snap-fit ​​and slot structure. In the above structure, the inner tailgate panel and the outer tailgate panel are manufactured separately and then connected to form an integral tailgate.

[0033] Both the inner tailgate panel 1 and the outer tailgate panel 2 are constructed using hot-melt injection molding of plastic granules. The inner tailgate panel 1 and the reinforcing rib 3 are integrally injection molded, as are the outer tailgate panel 2 and the reinforcing rib 3. In this configuration, the inner and outer tailgate panels are injection molded separately. During injection molding, the plastic granules are heated to a molten state, injected into the mold, and then demolded after pressure holding and cooling. The integral injection molding simplifies the process.

[0034] Metal reinforcement 6 is embedded in the inner surface of the tailgate inner panel 1, and metal reinforcement 6 is embedded in the inner surface of the tailgate outer panel 2. In this structure, the metal reinforcement 6 of the tailgate inner panel 1 is inserted during manufacturing to increase the strength of the localized areas of the tailgate inner panel 1 under high stress. The metal reinforcement 6 of the tailgate outer panel 2 is also inserted during manufacturing to increase the strength of the localized areas of the tailgate outer panel 2 under high stress. The metal reinforcement is only locally installed and does not excessively increase the overall weight of the tailgate.

[0035] The tailgate structure described in this utility model eliminates the use of metal materials in its construction. Instead, it utilizes engineering plastics to create the tailgate. The tailgate comprises an inner panel and an outer panel, both made of engineering plastics through injection molding. Engineering plastics are lightweight, and the addition of reinforcing ribs 3—specifically, multiple reinforcing ribs 4 arranged in a network on the inner surface of the inner panel 1 and the outer panel 2—further enhances the tailgate's overall weight. This design reduces the tailgate's weight by 30%-50% compared to traditional metal tailgates, while maintaining strength. This results in excellent impact resistance and weather resistance, effectively balancing lightweight design requirements with strength requirements.

[0036] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A tailgate structure for automobiles, characterized in that: The device includes an inner tailgate panel (1) and an outer tailgate panel (2). The inner tailgate panel (1) is an engineering plastic inner panel, and the outer tailgate panel (2) is an engineering plastic outer panel. The inner surface of the inner tailgate panel (1) is provided with a reinforcing rib (3), which includes multiple reinforcing ribs (4). The inner surface of the outer tailgate panel (2) is also provided with a reinforcing rib (3), which includes multiple reinforcing ribs (4). The inner tailgate panel (1) and the outer tailgate panel (2) are fixedly connected.

2. The automobile tailgate structure according to claim 1, characterized in that: The tailgate inner panel (1) is made of long fiber reinforced polypropylene material, and the tailgate outer panel (2) is made of long fiber reinforced polypropylene material.

3. The automobile tailgate structure according to claim 1 or 2, characterized in that: The multiple reinforcing ribs (4) of the inner panel (1) of the tailgate form a grid-like or honeycomb-like reinforcing rib section (3).

4. The automobile tailgate structure according to claim 3, characterized in that: The multiple reinforcing ribs (4) of the tailgate outer panel (2) form a grid-like or honeycomb-like reinforcing rib section (3).

5. The automobile tailgate structure according to claim 1 or 2, characterized in that: The outer surface of the tailgate outer panel (2) is provided with an ultraviolet protective coating (5).

6. The automobile tailgate structure according to claim 1 or 2, characterized in that: The inner surface edge of the tailgate outer panel (2) is provided with a side groove, and a sealing strip (7) is installed in the side groove.

7. The automobile tailgate structure according to claim 1 or 2, characterized in that: The tailgate inner panel (1) and tailgate outer panel (2) are fixedly connected by a buckle and slot structure.

8. The automobile tailgate structure according to claim 1 or 2, characterized in that: Both the inner tailgate panel (1) and the outer tailgate panel (2) are made of plastic granules through hot melt injection molding.

9. The automobile tailgate structure according to claim 4, characterized in that: The tailgate inner panel (1) and the reinforcing rib (3) are integrally injection molded structures, and the tailgate outer panel (2) and the reinforcing rib (3) are integrally injection molded structures.

10. The automobile tailgate structure according to claim 1 or 2, characterized in that: The inner surface of the tailgate inner panel (1) is fitted with a metal reinforcement (6), and the inner surface of the tailgate outer panel (2) is fitted with a metal reinforcement (6).

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