Tail door reinforcing structure, tail door and automobile

Abstract

The invention belongs to the field of automobiles, and particularly relates to a tail door reinforcing structure, a tail door and an automobile, the tail door reinforcing structure is assembled on a tail door inner plate, the tail door reinforcing structure comprises a tail door reinforcing part, and reinforcing plates pre-assembled on the tail door inner plate are connected in series through the tail door reinforcing part; the reinforcing plate comprises a hinge reinforcing plate and a lock reinforcing plate; the hinge reinforcing plate is assembled in a hinge mounting area of the tail door inner plate; the lock reinforcing plate is assembled in a lock mounting area of the tail door inner plate; the tail door reinforcing piece is connected with the hinge reinforcing plate and the lock reinforcing plate and fixedly connected with the tail door inner plate to form an integrated series connection structure. Compared with the prior art, the problem that in the prior art, the structural strength of a tail door is insufficient is solved, when the tail door is subjected to external force, the rigidity and strength of the whole tail door are guaranteed, the tail door is prevented from being opened after collision, and safe connection after collision fracture is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of automobiles, and in particular relates to a tailgate reinforcement structure, a tailgate and an automobile. Background Art

[0002] As a functional part of a car, the tailgate has high requirements for performance. Usually, some local metal plates are added to the inner panel of the tailgate to enhance the overall rigidity and strength. At the same time, under the concept of lightweight automobiles, the demand for weight reduction of the tailgate is also increasing.

[0003] The existing strengthening solutions include metal sheet metal insert injection molding and metal parts post-assembly.

[0004] Composite tailgate inner panels with metal sheet metal inserts, such as CN201821002612.4 and CN201921559813.9, are prone to cracking due to the problem of metal sheet metal dimensional accuracy. At the same time, because the surface of the composite tailgate inner panel is relatively complex, the molding of the metal sheet metal is relatively difficult, and the large number of processes can easily increase costs.

[0005] The composite tailgate assembled after the metal parts is connected by fastening points or glue, such as CN201820456439.9, CN201811613063.9, etc., and has a relatively low cost advantage.

[0006] Moreover, no matter which reinforcement scheme is adopted, the large-area use of metal parts will make the overall weight of the car tailgate heavier and fail to meet the lightweight requirements.

[0007] Therefore, it is necessary to develop a tailgate reinforcement structure that can satisfy both structural reinforcement and a certain lightweight effect. Summary of the invention

[0008] The purpose of the present invention is to provide a tailgate reinforcement structure, a tailgate and a car in order to solve at least one of the above problems, so as to solve the problem of insufficient strength of the tailgate structure in the prior art, ensure the rigidity and strength of the entire tailgate when the tailgate is subjected to external force, prevent the tailgate from opening after a collision, and ensure a safe connection after a collision breakage.

[0009] The purpose of the present invention is achieved through the following technical solutions:

[0010] The first aspect of the present invention discloses a tailgate reinforcement structure, which is mounted on a tailgate inner plate, wherein the tailgate reinforcement structure comprises a tailgate reinforcement member, wherein the tailgate reinforcement member connects the reinforcement plates preassembled on the tailgate inner plate in series;

[0011] The reinforcement plate includes a hinge reinforcement plate and a lock reinforcement plate;

[0012] The hinge reinforcement plate is mounted on the hinge installation area of ​​the tailgate inner panel;

[0013] The lock reinforcement plate is mounted on the lock installation area of ​​the tailgate inner panel;

[0014] The tailgate reinforcement member is connected to the hinge reinforcement plate and the lock reinforcement plate, and is fixedly connected to the tailgate inner plate to form an integrated series structure.

[0015] Preferably, the reinforcement plate further comprises a strut ball reinforcement plate mounted on the strut mounting area of ​​the tailgate inner panel, and the tailgate reinforcement is further connected to the strut ball reinforcement plate.

[0016] Preferably, a nut is fixed on the tailgate reinforcement, and the tailgate reinforcement is fixedly connected to the reinforcement plate and the tailgate inner plate by bolt connection.

[0017] Preferably, the tailgate reinforcement is fixed to the nut by welding.

[0018] Preferably, the cross-section of the tailgate reinforcement at the connection is square, the nut is a hexagonal nut, and the tailgate inner plate, the reinforcement plate, the tailgate reinforcement and the nut are arranged in sequence and fixedly connected by bolts.

[0019] Preferably, the cross-section of the tailgate reinforcement at the connection is oval, the nut is a high-head nut, and the tailgate inner plate, reinforcement plate, nut and tailgate reinforcement are arranged in sequence and fixedly connected by bolts.

[0020] Preferably, the tailgate inner panel is provided with a flange on the inner side surface for limiting the tailgate reinforcement.

[0021] Preferably, the tailgate reinforcement is a metal part or a plastic part.

[0022] A second aspect of the present invention discloses a tailgate, on which is mounted any of the above-mentioned tailgate reinforcement structures.

[0023] A third aspect of the present invention discloses a car, wherein the car is equipped with any of the above-mentioned tailgate reinforcement structures, or is equipped with the above-mentioned tailgate.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The invention provides a tailgate reinforcement structure, the purpose of which is to strengthen the strength of the tailgate, reduce the cost of the tailgate assembly, reduce the weight of the tailgate assembly, and further increase the process window of the composite material tailgate.

[0026] The tailgate reinforcement structure connects several main stress-bearing key points on the tailgate in series through the tailgate reinforcement to form a continuous stress path, which can improve the overall strength of the tailgate. Compared with the traditional use of large-area metal plates, the tailgate reinforcement is light in weight and can further improve the overall performance of the tailgate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a tailgate equipped with a tailgate reinforcement structure;

[0028] Figure 2 Schematic diagram of the structure of the tailgate reinforcement, where: Figure 2 (a) is a schematic diagram of the structure of a tailgate reinforcement with a square cross section. Figure 2 (b) Figure 2 (a) Schematic diagram of AA section, Figure 2 (c) is a schematic diagram of the structure of a tailgate reinforcement with a circular cross section. Figure 2 (d) Figure 2 (c) Schematic diagram of the BB cross section;

[0029] Figure 3 Schematic diagram of the connection structure of the tailgate reinforcement at the hinge reinforcement plate, where: Figure 3 (a) is a schematic diagram of the connection structure of the square-section tailgate reinforcement at the hinge reinforcement plate. Figure 3 (b) is a schematic diagram of the connection structure of the circular cross-section tailgate reinforcement at the hinge reinforcement plate;

[0030] Figure 4 It is a schematic diagram of the structure of the tailgate reinforcement at the hinge reinforcement plate;

[0031] Figure 5 The figure is a schematic diagram of the assembly structure of the tailgate reinforcement on the tailgate inner panel, wherein: Figure 5 (a) is a schematic diagram of the structure of the inner side of the tailgate inner panel. Figure 5 (b) is a schematic diagram of the structure of the outer side of the tailgate inner panel;

[0032] Figure 6 Schematic diagram of the connection structure of the tailgate reinforcement at the lock reinforcement plate, where: Figure 6 (a) is a schematic diagram of the connection of a square-section tailgate reinforcement at the lock reinforcement plate. Figure 6 (b) is a schematic diagram of the connection of a tailgate reinforcement with a circular cross section at the lock reinforcement plate;

[0033] Figure 7 is a schematic diagram of the connection structure of the tailgate reinforcement at the support rod ball head reinforcement plate;

[0034] In the figure: 1-hinge reinforcement plate; 2-tailgate reinforcement; 3-lock reinforcement plate; 4-tailgate inner panel; 5-high head nut; 6-hexagonal nut; 7-bolt; 8-hinge; 1a-hinge installation point; 1b-hinge positioning structure; 1c-blind rivet; 2a-tailgate inner panel installation point; 3a-lock installation point; 3b-locking position structure. DETAILED DESCRIPTION

[0035] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] A tailgate reinforcement structure, such as Figure 1-7 As shown, it is assembled on the tailgate inner panel 4, and the tailgate reinforcement structure includes a tailgate reinforcement member 2, and the tailgate reinforcement member 2 connects the reinforcement plates preassembled on the tailgate inner panel 4 in series;

[0038] The reinforcement plate comprises a hinge reinforcement plate 1 and a lock reinforcement plate 3;

[0039] The hinge reinforcement plate 1 is mounted on the hinge 8 mounting area of ​​the tailgate inner panel 4;

[0040] The lock reinforcement plate 3 is mounted on the lock installation area of ​​the tailgate inner plate 4;

[0041] The tailgate reinforcement member 2 is connected to the hinge reinforcement plate 1 and the lock reinforcement plate 3, and is fixedly connected to the tailgate inner plate 4 to form an integrated series structure.

[0042] More specifically, in this embodiment:

[0043] like Figure 1 As shown, the tailgate reinforcement 2 connects the hinge reinforcement plate 1 (used to strengthen the local strength of the hinge 8 installation area) and the lock reinforcement plate 3 (used to strengthen the local strength of the lock installation area) as a whole. At the same time, the tailgate reinforcement 2 is also fixedly connected to the tailgate inner plate 4, so that the tailgate inner plate 4, the hinge reinforcement plate 1, and the lock reinforcement plate 3 form a series structure, so that the tailgate has a continuous force path, thereby improving the overall strength of the tailgate. In the case where a ball head installation point is also provided on the tailgate, the structure at the ball head can be strengthened by adding a section of the tailgate reinforcement 2 to connect the support rod ball head reinforcement plate.

[0044] Tailgate reinforcement 2, such as Figure 2 As shown, the tailgate reinforcement 2 is formed by bending a standard cross-section profile. The material of the tailgate reinforcement 2 includes but is not limited to metal or plastic. The main purpose is to provide strength and to fix and connect in series with the metal parts (reinforcement plates) in each area and the tailgate inner panel 4; Figure 2 The conventionally used square cross-section tailgate reinforcement 2 ( Figure 2 (a) Figure 2(b)) and a circular cross-section tailgate reinforcement 2 ( Figure 2 (c) Figure 2 (d)), the square cross-section tailgate reinforcement 2 can directly match the installation surface at the connection due to its own shape, and the process path is mainly bending and punching; the round cross-section tailgate reinforcement 2 needs an additional flattening process at the connection to become an oblate circle to ensure matching with the installation surface. Generally speaking, the tailgate reinforcement 2 has a simpler forming process and lower cost than conventional metal plates.

[0045] Figure 3 middle Figure 3 (a) and Figure 3 (b) shows the assembly structure diagram of the tailgate reinforcement 2 with a square cross section and the tailgate reinforcement 2 with a circular cross section at the connection (taking the hinge 8 mounting plate as an example). It can be seen that the hinge 8, the tailgate inner plate 4, the hinge 8 mounting plate and the tailgate reinforcement 2 are locked and fixed by the threaded cooperation between the nut pre-fixed on the tailgate reinforcement 2 and the bolts 7 passing through each layer in sequence. Figure 3 (a) The square cross-section tailgate reinforcement 2 is shown, and the hinge 8, tailgate inner panel 4, hinge 8 mounting plate and tailgate reinforcement 2 are arranged in sequence. The hexagonal nut 6 is welded and fixed on the outside of the tailgate reinforcement 2. The bolt 7 passes through the hinge 8, tailgate inner panel 4, hinge 8 mounting plate and tailgate reinforcement 2 in sequence and then forms a thread lock with the hexagonal nut 6. Figure 3 (b) The tailgate reinforcement 2 with a circular cross section is shown. It can be seen that at the connection, the tailgate reinforcement 2 is flattened to form an oblate shape, on which a high head nut 5 penetrating the interior is welded, and the hinge 8, the tailgate inner panel 4, the hinge 8 mounting plate, the high head nut 5 and the tailgate reinforcement 2 are arranged in sequence, and bolts 7 pass through them in sequence to form a threaded assembly. The connection between the tailgate reinforcement 2, the tailgate inner panel 4 and the reinforcement plate plays a role in improving the rigidity and strength of the entire composite tailgate assembly. At the same time, it can ensure that the door will not open when the composite tailgate is broken by a high-speed collision, thereby avoiding secondary damage.

[0046] Figure 4 The following is a partial structural diagram of the tailgate reinforcement 2 assembled on the hinge 8 mounting plate, taking a square-section tailgate reinforcement 2 as an example. The hinge 8 mounting plate itself is positioned on the tailgate inner panel 4 through the hinge positioning structure 1b, and is connected with bolts 7 through nuts (hinge mounting points 1a) pre-welded on the inner side of the hinge 8 mounting plate, and finally the hinge 8 mounting plate is fixedly installed on the inner side of the tailgate inner panel 4 through blind rivets 1c. The tailgate reinforcement 2 is assembled and fixed with the hinge 8 mounting plate and the tailgate inner panel 4 in the above-mentioned manner.

[0047] like Figure 5 As shown, the tailgate reinforcement 2 is fixedly connected to the tailgate inner panel 4 by the above-mentioned assembly method, which is the tailgate inner panel mounting point 2a. Figure 5 (a) and Figure 5 (b) It can be seen that a flange is provided on the inner side of the tailgate inner panel 4 to limit the tailgate reinforcement 2, and no flange is provided on the outer side of the tailgate inner panel 4.

[0048] Figure 6 The lock installation area, the lock reinforcement plate 3, the connection structure of the tailgate reinforcement 2, wherein Figure 6 (a) is a schematic diagram of the connection structure of the square cross-section tailgate reinforcement 2, Figure 6 (b) is a schematic diagram of the connection structure of the tailgate reinforcement 2 with a circular cross section. It can be seen that the lock reinforcement plate 3 is positioned on the tailgate inner plate 4 through the locking positioning structure 3b, and is fixedly assembled with the tailgate inner plate 4 at the lock installation point 3a; the installation position of the lock reinforcement plate 3 is inconsistent according to the different cross-sectional shapes of the tailgate reinforcement 2.

[0049] Figure 7 The figure shows the connection structure of the tailgate reinforcement 2 when there is a strut ball head reinforcement plate (strut installation area) inside the tailgate, which is connected to the strut ball head reinforcement plate, and uses the strut ball head reinforcement plate as a relay structure to connect each reinforcement plate through two or more sections of the tailgate reinforcement 2.

[0050] The tailgate reinforcement structure is installed behind the tailgate. When the tailgate is subjected to external force, it can ensure the rigidity and strength of the entire tailgate, prevent the tailgate from opening after a collision, and ensure a safe connection after a collision breakage; at the same time, it reduces the cost of the tailgate assembly, reduces the weight of the tailgate assembly, and increases the process window of the composite material tailgate.

[0051] This embodiment further provides a tailgate, on which the tailgate reinforcement structure as described above is installed to enhance the strength and rigidity of the tailgate.

[0052] This embodiment also provides a car, which is equipped with the tailgate as described above.

[0053] The reinforcement structure can be further expanded and has certain practical significance and reference value in other product usage scenarios that require increased strength and rigidity. In addition, the reinforcement structure can also be changed in various ways, such as the cross-sectional shape, material, connection area of ​​the reinforcement member, multiple sections or a full circle, and connection form; and the structure of the reinforcement member is not limited to standard cross-sections and metal parts, but can also be a plastic bracket with an irregular cross-section.

[0054] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A tailgate reinforcement structure, mounted on a tailgate inner panel (4), characterized in that: The tailgate reinforcement structure comprises a tailgate reinforcement member (2), wherein the tailgate reinforcement member (2) connects in series the reinforcement plates preassembled on the tailgate inner plate (4); The reinforcement plate comprises a hinge reinforcement plate (1) and a lock reinforcement plate (3); The hinge reinforcement plate (1) is mounted on the hinge installation area of ​​the tailgate inner plate (4); The lock reinforcement plate (3) is mounted on the lock installation area of ​​the tailgate inner plate (4); The tailgate reinforcement member (2) is connected to the hinge reinforcement plate (1) and the lock reinforcement plate (3), and is fixedly connected to the tailgate inner plate (4) to form an integrated series structure.

2. The tailgate reinforcement structure according to claim 1, characterized in that: The reinforcement plate also includes a strut ball head reinforcement plate mounted on the strut mounting area of ​​the tailgate inner plate (4), and the tailgate reinforcement member (2) is also connected to the strut ball head reinforcement plate.

3. A tailgate reinforcement structure according to claim 1 or 2, characterized in that: A nut is fixed on the tailgate reinforcement member (2), and the tailgate reinforcement member (2) is fixedly connected to the reinforcement plate and the tailgate inner plate (4) by bolts (7).

4. The tailgate reinforcement structure according to claim 3, characterized in that: The tailgate reinforcement (2) is fixed by welding to the nut.

5. The tailgate reinforcement structure according to claim 3, characterized in that: The cross section of the tailgate reinforcement (2) at the connection is square, the nut is a hexagonal nut (6), and the tailgate inner plate (4), the reinforcement plate, the tailgate reinforcement (2) and the nut are arranged in sequence and fixedly connected by bolts (7).

6. The tailgate reinforcement structure according to claim 3, characterized in that: The cross section of the tailgate reinforcement (2) at the connection is oval, the nut is a high-head nut (5), and the tailgate inner plate (4), the reinforcement plate, the nut and the tailgate reinforcement (2) are arranged in sequence and fixedly connected by bolts (7).

7. A tailgate reinforcement structure according to claim 1 or 2, characterized in that: The tailgate inner plate (4) is provided with a flange on the inner side surface for limiting the tailgate reinforcement member (2).

8. The tailgate reinforcement structure according to claim 1, characterized in that: The tailgate reinforcement (2) is a metal part or a plastic part.

9. A tailgate, characterized in that: The tailgate is equipped with a tailgate reinforcement structure as described in any one of claims 1-8.

10. An automobile, characterized in that: The automobile is equipped with a tailgate reinforcement structure as described in any one of claims 1 to 8, or is equipped with a tailgate as described in claim 9.

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