Plastic-metal composite automobile tail door assembly and automobile

Abstract

The utility model belongs to the field of automobiles, and particularly relates to a plastic-metal composite automobile tail door assembly and an automobile, which comprise a tail door inner plate and a tail door outer plate. The tail door inner plate is made of light metal or light alloy; the tail door outer plate is made of plastic with a low linear expansion coefficient; the tail door inner plate and the tail door outer plate are connected through connecting glue in a gluing mode to form a cavity structure. Compared with the prior art, the automobile tail door solves the problems that in the prior art, when the automobile tail door is made of light alloy materials, stamping is difficult, cost is high, when the automobile tail door is made of plastic materials, performance is poor, a large number of reinforcing structures and reinforcing pieces need to be arranged, and the light weight effect is weakened. According to the tail door assembly, the cavity structure is formed, light weight is guaranteed, meanwhile, reinforcement can be achieved through simple thickening, the mechanical performance of the tail door assembly can be improved through the formed cavity structure, and high-low-temperature deformation of products is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of automobiles, and in particular relates to a plastic-metal composite automobile tailgate assembly and an automobile. Background Art

[0002] With the demand for lightweight cars, more and more lightweight materials are being used to replace sheet metal on tailgates. Currently, the most mainstream ones are aluminum alloy tailgates and plastic tailgates.

[0003] Aluminum alloy tailgates offer the advantage of high lightweighting, but to maintain a polished appearance, their outer panels are often formed from stamped aluminum, a complex process with high costs. Plastic tailgates offer advantages over aluminum alloy tailgates, including lower cost, greater styling freedom, and excellent light and wave transmission. However, to achieve comparable performance to metal tailgates, these require the addition of numerous plastic and metal reinforcements to the inner panels, reducing the weight reduction. Examples include lightweight tailgates disclosed in CN210161881U and CN209008360U. Furthermore, tailgates often require numerous components, such as hinges, strut ball studs, door locks, glass, high-brake lights, windshield washer fluid nozzles, wiper motors, taillights, tailgate wiring harnesses, antenna wiring harnesses, door lock motors, and interior trim. The design of these components requires interfaces on the inner or outer panels and spoiler, often impairing the tailgate's performance.

[0004] Therefore, it is necessary to provide a new type of automobile tailgate to ensure its structural strength, performance and lightweight requirements at the same time. Utility Model Content

[0005] The purpose of the present invention is to provide a plastic-metal composite automobile tailgate assembly and an automobile in order to solve at least one of the above problems, so as to solve the problem in the prior art that when the automobile tailgate is made of light alloy material, it is difficult to stamp and the cost is high, and when it is made of plastic material, the performance is weak and a large number of reinforcing structures and reinforcing parts need to be set, resulting in a weakening of the lightweight effect. This solution forms a cavity structure by bonding the light alloy inner panel and the plastic outer panel together, thereby achieving reinforcement through simple thickening while ensuring lightweight, and the formed cavity structure can also improve the mechanical properties of the tailgate assembly and reduce the high and low temperature deformation of the product.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] The first aspect of the utility model discloses a plastic-metal composite automobile tailgate assembly, comprising a tailgate inner panel and a tailgate outer panel;

[0008] The tailgate inner panel is made of light metal or light alloy;

[0009] The tailgate outer panel is made of plastic with a low linear expansion coefficient;

[0010] The tailgate inner panel and the tailgate outer panel are bonded together by means of a connecting adhesive to form a cavity structure.

[0011] Preferably, the structure installation area on the tailgate inner panel is provided with a thickened structure.

[0012] Preferably, the structural mounting area includes at least the hinge mounting area, ball head mounting area, latch mounting area, wiper motor mounting area, buffer block mounting area, through-taillight mounting area, and damper mounting area. In other words, the tailgate inner panel can be thickened to enhance the structural strength of the mounting areas where other structures and components are mounted.

[0013] Preferably, the width of the thickened structure is 1.5-3 times that of the unthickened tailgate inner panel.

[0014] Preferably, a reinforcement structure is further provided on the side of the thickened structure.

[0015] Preferably, a plurality of the reinforcement structures are arranged at intervals along the length direction of the thickening structure.

[0016] Preferably, the extension directions of the reinforcement structures are arranged parallel to each other.

[0017] Preferably, the tailgate inner panel is made of aluminum alloy or magnesium alloy.

[0018] Preferably, the tailgate outer panel is made of modified polypropylene.

[0019] A second aspect of the present invention discloses an automobile, comprising any one of the above automobile tailgate assemblies, wherein the automobile tailgate assembly is assembled at the tailgate of the automobile.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This patent provides a plastic-aluminum hybrid tailgate. The inner panel is constructed of a lightweight alloy, ensuring performance while reducing weight. The light alloy die-casting process is employed, and variable wall thickness design allows for localized reinforcement in key areas, enhancing tailgate performance. The outer panel is constructed of plastic, ensuring weight reduction while enhancing the product's appearance, styling, and light and wave transmission. The lightweight alloy inner panel and plastic outer panel are bonded together with glue, ensuring a strong connection while improving watertightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure explosion of the inner and outer panels of a stamped aluminum tailgate or a plastic tailgate in the prior art;

[0023] Figure 2 This is the exploded diagram of the structure of the car guard door assembly on the reverse side;

[0024] Figure 3 for Figure 2 Schematic diagram of the structure of the AA section;

[0025] In the figure: 1- tailgate inner panel; 2- tailgate outer panel; 3- connecting glue; 11- thickened structure; 12- reinforced structure. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 An exploded view of the inner and outer panels of existing stamped aluminum or plastic tailgates shows the complex structure of these panels, requiring the installation of numerous external structures, components, and assemblies, such as hinges, ball joints, latches, wiper motors, buffer blocks, through-taillights, and dampers. These mounting structures often feature deep protrusions and recesses, making them difficult to form in one go during stamping. Consequently, using an all-aluminum tailgate presents high stamping requirements and difficulty, leading to high costs. Using an all-plastic tailgate, on the other hand, requires numerous additional reinforcements and components to facilitate the installation of these external structures, components, and assemblies, diminishing the lightweighting effect.

[0028] Example 1

[0029] A plastic-metal composite automobile tailgate assembly, such as Figure 2 、 3 As shown, it includes a tailgate inner panel 1 and a tailgate outer panel 2;

[0030] The tailgate inner panel 1 is made of light metal or light alloy;

[0031] The tailgate outer panel 2 is made of plastic with a low linear expansion coefficient;

[0032] The tailgate inner panel 1 and the tailgate outer panel 2 are adhesively connected by a connecting glue 3 to form a cavity structure.

[0033] More specifically, in this embodiment:

[0034] like Figure 2 and Figure 3 As shown, the tailgate assembly is formed by bonding an aluminum alloy tailgate inner panel 1 and a plastic tailgate outer panel 2 by means of a connecting glue 3 .

[0035] The tailgate inner panel 1 in this solution is made of Al-Si series non-heat-treated high-toughness aluminum alloy material and is formed by die-casting. The installation area of ​​the tailgate inner panel 1, such as the hinge, ball head, lock, wiper motor, buffer block, through-taillight, damper and other external components to be installed, can be partially thickened to achieve structural reinforcement and integrated molding, such as Figure 3 The area of ​​the thickened structure 11 is shown; the width of the thickened structure 11 is 1.5-3 times wider than the conventional part according to the requirements of the installation object. On this basis, areas and points that still need further enhancement can be strengthened by setting up reinforcing structures 12 (such as reinforcing ribs). Figure 3 As shown in the figure, each reinforcement structure 12 extends outward from the side of the thickened structure 11. The extension directions of the reinforcement ribs can generally be controlled to be consistent or parallel to each other. The visible area of ​​the tailgate inner panel 1 can be painted to ensure the appearance. The paint color can be coordinated with the interior.

[0036] The tailgate outer panel 2 is made of modified polypropylene with a low linear expansion coefficient and is connected to the tailgate inner panel 1 via adhesive 3. The resulting cavity structure increases the moment of inertia of the cross section, thereby improving the mechanical performance of the tailgate assembly and reducing product deformation at high and low temperatures.

[0037] The tailgate assembly of this solution is compared with Figure 1 The difference between the existing stamped aluminum tailgate or plastic tailgate shown in the figure is that the existing tailgate inner panel 1 requires the design of an additional reinforcement plate for structural reinforcement; while the present solution can be achieved through simple local thickening (which can be integrally formed during the stamping process). Therefore, the present solution can reduce the amount of additional component assembly, reduce the difficulty of production and assembly, and improve the lightweight effect.

[0038] This embodiment further discloses a car, which includes the above-mentioned car tailgate assembly, and the car tailgate assembly is assembled at the tailgate of the car.

[0039] In some other embodiments, the tailgate inner panel 1 may also be made of other light alloys and light metal materials such as magnesium alloy, and processed using a corresponding integrated die-casting process.

[0040] This proposal provides a tailgate assembly formed by bonding an aluminum alloy inner panel and a plastic outer panel, which is used to further improve the lightweight degree and product performance of the tailgate while ensuring the tailgate's appearance, styling freedom, and light and wave transmission functions.

[0041] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A plastic-metal composite automobile tailgate assembly, characterized in that: It comprises a tailgate inner panel (1) and a tailgate outer panel (2); The tailgate inner panel (1) is made of light metal or light alloy; The tailgate outer panel (2) is made of plastic with a low linear expansion coefficient; The tailgate inner panel (1) and the tailgate outer panel (2) are adhesively connected via a connecting adhesive (3), forming a cavity structure between the tailgate inner panel (1) and the tailgate outer panel (2).

2. The plastic-metal composite automobile tailgate assembly according to claim 1, characterized in that: The structural installation area on the tailgate inner panel (1) is provided with a thickened structure (11).

3. The plastic-metal composite automobile tailgate assembly according to claim 2, characterized in that: The structural installation area includes a hinge installation area, a ball head installation area, a lock installation area, a wiper motor installation area, a buffer block installation area, a through taillight installation area and a damper installation area.

4. The plastic-metal composite automobile tailgate assembly according to claim 2, characterized in that: The width of the thickened structure (11) is 1.5-3 times that of the unthickened tailgate inner panel (1).

5. The plastic-metal composite automobile tailgate assembly according to claim 2, characterized in that: A reinforcement structure (12) is also provided extending from the side of the thickened structure (11).

6. The plastic-metal composite automobile tailgate assembly according to claim 5, characterized in that: A plurality of the reinforcement structures (12) are arranged at intervals along the length direction of the thickening structure (11).

7. The plastic-metal composite automobile tailgate assembly according to claim 6, characterized in that: The extension directions of the reinforcement structures (12) are arranged parallel to each other.

8. The plastic-metal composite automobile tailgate assembly according to claim 1, characterized in that: The tailgate inner plate (1) is made of aluminum alloy or magnesium alloy.

9. The plastic-metal composite automobile tailgate assembly according to claim 1, characterized in that: The tailgate outer panel (2) is made of modified polypropylene.

10. An automobile, characterized in that: It comprises the automobile tailgate assembly according to any one of claims 1 to 9, wherein the automobile tailgate assembly is assembled at the tailgate of the automobile.

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