CN118651040A - Automobile back door structure and automobile - Google Patents

Abstract

The invention discloses an automobile back door structure and an automobile, which belong to the technical field of automobiles and comprise an outer plate structure and an inner plate structure which are connected; the inner plate structure comprises an inner plate, a window frame is arranged on the middle upper portion of the inner plate, V-shaped main ribs are arranged between the inner plate corresponding to the bottom of the window frame and the lock installation area, the V-shaped main ribs span the recessed position of the tail lamp box, a cross beam is arranged in the middle of the V-shaped main ribs, and two ends of the cross beam are fixedly connected with the V-shaped main ribs.

Description

Automobile back door structure and automobile

Technical Field

The invention belongs to the technical field of automobiles, and in particular relates to an automobile back door structure and an automobile.

Background Art

The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

The tailgate is a major component of the car body. As the main opening and closing system of the car, it not only bears functional requirements such as storage and escape route, but also needs to meet requirements such as durability, NVH, and aesthetics. With the development of the automotive industry and the gradual increase in functional requirements, especially through-type taillights have become the trend of the industry, which has brought increasing challenges to the design of tailgates. How to design a tailgate that not only meets the requirements of through-type taillights, but also takes into account durability, NVH and lightweight performance has become a difficult point in the design of tailgates in the industry.

Tail lights on the rear doors are usually divided into non-through and through types. In the case of a non-through taillight rear door structure, the inner and outer panels are not cut off by the taillight box in the middle, so the upper and lower rigidity of the rear door is relatively continuous, and durability and NVH performance are easier to achieve. In the case of a through taillight rear door structure, due to the need to install the taillight, the through taillight box will cut the outer panel in the middle, and the upper and lower rigidity of the rear door will be discontinuous, and it will bend and deform at the taillight box position, which has a greater impact on durability and NVH performance.

Regarding the design of the through-type taillight tailgate structure, the common practice in the industry is to add a large supporting bracket between the inner and outer panels of the lower half of the tailgate to compensate for the structural defects at the taillight box. However, this method will result in an extra part for the tailgate, which will increase the development cost, weight, and process difficulty, increase the difficulty of tailgate molding, and increase the cost.

Summary of the invention

In view of the shortcomings of the prior art, the purpose of the present invention is to provide a car tailgate structure and a car, which has good structural performance and is highly lightweight. It can take into account the requirements of durability, NVH, etc., and can greatly reduce the difficulty of the process, is easy to manufacture, and is convenient for mass production.

In order to achieve the above object, the present invention is implemented through the following technical solutions:

In a first aspect, the present invention provides a car tailgate structure, comprising an outer panel structure and an inner panel structure connected to each other; the inner panel structure comprises an inner panel, a window frame is arranged at the middle and upper part of the inner panel, a V-shaped main rib is arranged between the bottom of the window frame and the lock installation area of the inner panel, the V-shaped main rib spans the recessed position of the taillight box, a crossbeam is arranged in the middle of the V-shaped main rib, and both ends of the crossbeam are fixedly connected to the V-shaped main rib.

As a further technical solution, the crossbeam is provided with a plurality of vertical ribs, the vertical ribs are overlapped from the lower end of the window frame to the V-shaped main ribs, and the plurality of vertical ribs are arranged in parallel and at intervals.

As a further technical solution, side beams are arranged on both sides of the inner panel, and an R-angle structure is formed at the overlap between the V-shaped main reinforcement and the side beams; support legs are arranged on the edge of the cross beam to support the outer panel structure, so that the middle part of the inner panel, the taillight box and the outer panel structure form a closed cavity structure.

As a further technical solution, the inner plate is provided with welding corners corresponding to the corners of the window frame, and the inner plate is provided with a plurality of weight-reducing holes corresponding to the lower part of the window frame, and the weight-reducing holes have flanges.

As a further technical solution, a lock reinforcement plate is fixedly arranged in the middle part of the bottom of the inner plate, hinge reinforcement plates are arranged on both sides of the top of the inner plate, and gas spring reinforcement plates are arranged on both sides of the middle of the inner plate; a lock mounting boss is arranged on the inner plate corresponding to the lock reinforcement plate, and a hinge mounting boss is arranged on the inner plate at the hinge reinforcement plate, and both the lock mounting boss and the hinge mounting boss have an R angle.

As a further technical solution, a through rib is arranged in the middle of the hinge reinforcement plate, a plurality of flat ribs are arranged on the through rib and overlapped with the welding surface on the window frame, an upper end flange is arranged on the top of the hinge reinforcement plate, and a convex rib is arranged corresponding to the side of the upper end flange.

As a further technical solution, a through rib is arranged in the middle of the gas spring reinforcement plate, and a plurality of flanged weight-reducing holes are arranged on the through rib; the gas spring reinforcement plate is provided with a gas spring mounting surface, and convex ribs are arranged around the gas spring mounting surface; flanges are arranged on both sides of the lock reinforcement plate, the lower end of the lock reinforcement plate is connected to the sealing surface through a structural adhesive groove, and a lock mounting surface is arranged in the middle of the lock reinforcement plate.

As a further technical solution, the outer panel structure includes an upper outer panel, a bottom middle part of the upper outer panel is fixedly connected to the lower outer panel, taillight mounting plates are arranged on both side parts between the upper outer panel and the lower outer panel, the taillight mounting plates are fixedly connected to the inner panel, and both the upper outer panel and the lower outer panel are connected to the inner panel by flanges.

As a further technical solution, the taillight mounting plate is provided with multiple inclined bosses, an upper outer panel boss is provided at the top of the upper outer panel, a spoiler mounting surface is provided on the upper outer panel corresponding to the bottom of the upper outer panel boss, a window frame is provided in the middle of the upper outer panel, and multiple taillight recessed bosses are provided between the middle part of the bottom of the upper outer panel and the lower outer panel.

In a second aspect, the present invention further provides a car, comprising the car tailgate structure as described above.

The beneficial effects of the present invention are as follows:

The automobile tailgate structure of the present invention has a V-shaped main reinforcement on the inner panel from the lock installation area to the lower corner of the window frame, the V-shaped main reinforcement spans the recessed position of the taillight box, and a crossbeam is arranged in the middle of the V-shaped main reinforcement to overlap the V-shaped main reinforcement, and vertical reinforcements are arranged on the crossbeam from the lower welding edge of the window frame to overlap the V-shaped main reinforcement. Through the cooperation of the V-shaped main reinforcement, the crossbeam and the vertical reinforcement, the stiffness discontinuity problem caused by the recess of the through-type taillight box can be compensated to a great extent, the continuity of the stiffness transmission path from the window frame to the side beam and the lock position is ensured, and the overall bending and torsion resistance of the tailgate is improved.

The automobile tailgate structure of the present invention forms an R-angle structure with a height difference at the overlap between the V-shaped main reinforcement on the inner panel and the side beam, and a support leg is arranged from the edge of the cross beam at the lower end of the window frame to support the lower outer panel, so that the middle part of the inner panel, the taillight box and the outer panel form a closed cavity structure, thereby improving the bending resistance of the tailgate at the recessed position of the taillight box.

The automobile tailgate structure of the present invention provides weight-reducing holes with flanges on the inner plate, thereby ensuring that the weight of the tailgate is reduced to a great extent without reducing the rigidity.

In the automobile rear door structure of the present invention, the taillight mounting plate is provided with inclined bosses at the upper and lower R angle positions, and bosses are provided at the recessed surfaces of the taillight boxes of the upper and lower outer plates, so as to improve the bending resistance of the taillight box itself.

The automobile tailgate structure of the present invention has a through rib in the middle of the hinge reinforcement plate to increase the cavity area of the window frame corner, a flat rib is arranged on the through rib at the lower end of the hinge installation surface to overlap the welding surface on the window frame, and the upper end flange and the side convex ribs can improve the rigidity of the hinge installation point while improving the bending and torsion resistance of the corner.

In the automobile tailgate structure of the present invention, the upper end of the gas spring reinforcement plate crosses over the lower R angle of the window frame, and the lower end crosses over the cross section of the taillight box, which effectively compensates for the stiffness of the tailgate at the taillight box; a through rib is arranged in the middle of the gas spring reinforcement plate, and a weight-reducing hole is arranged on the through rib, which reduces the weight to the greatest extent while ensuring the continuity of the upper and lower stiffness; convex ribs are added around the gas spring installation surface, which improves the local stiffness strength bearing without increasing the weight.

In the automobile rear door structure of the present invention, flanges are arranged on both sides of the lock reinforcement plate, and the lower end is connected to the sealing surface by structural adhesive, so as to improve the connection rigidity of the lock with the least amount of material.

The automobile rear door structure of the present invention has no separate outer panel support plate, has a simple structure, high rigidity, high lightness, and high degree of commonality. It can be applied to both the rear door structure of the traditional non-through taillight and the rear door structure of the through taillight with a deep recess, and has low process and matching difficulty.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

FIG1 is a schematic diagram of the structure of a car back door according to one or more embodiments of the present invention;

FIG2 is a schematic diagram of a rear door structure of an automobile without an outer panel according to one or more embodiments of the present invention;

FIG3 is a schematic diagram of an inner panel structure according to one or more embodiments of the present invention;

FIG4 is a schematic diagram of an upper outer plate structure according to one or more embodiments of the present invention;

FIG5 is a schematic diagram of the structure of a taillight mounting plate according to one or more embodiments of the present invention;

FIG6 is a schematic diagram of a hinge reinforcement plate structure according to one or more embodiments of the present invention;

7 is a schematic diagram of the structure of a gas spring reinforcement plate according to one or more embodiments of the present invention;

FIG8 is a schematic diagram of a lock reinforcement plate structure according to one or more embodiments of the present invention;

In the figure: 1, lower outer panel, 2, tail light mounting plate, 3, upper outer panel, 4, lock reinforcement plate, 5, inner panel, 6, gas spring reinforcement plate, 7, hinge reinforcement plate;

201, oblique boss;

301, upper outer panel boss, 302, spoiler mounting surface, 303, tail lamp recess boss;

401, structural adhesive groove, 402, flange, 403, lock installation surface;

501, V-shaped main reinforcement, 502, vertical reinforcement, 503, lock mounting boss, 504, support leg, 505, cross beam, 506, weight reduction hole, 507, R angle structure, 508, welding edge corner, 509, hinge mounting boss, 510, side beam;

601, flange weight-reducing hole, 602, through rib, 603, convex rib;

701. Flat rib, 702. Through rib, 703. Upper end flange, 704. Convex rib.

In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only.

DETAILED DESCRIPTION

It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and/or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and/or combinations thereof;

For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

Terminology explanation section: If the terms "install", "connected", "connect", "fixed" and the like appear in the present invention, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

In a typical embodiment of the present invention, as shown in FIG. 1-FIG . 2 , a car tailgate structure is provided, which includes an outer panel structure and an inner panel structure, and the outer panel structure and the inner panel structure are connected.

The outer panel structure includes a lower outer panel 1 and an upper outer panel 3. The lower outer panel 1 is placed below the upper outer panel 3, and the middle part of the bottom of the upper outer panel 3 is fixedly connected to the lower outer panel 1. In this embodiment, the middle part of the upper outer panel 3 and the lower outer panel 1 are connected by welding points.

Taillight mounting plates 2 are arranged on both sides between the upper outer plate 3 and the lower outer plate 1. Two taillight mounting plates 2 are arranged, and the two taillight mounting plates 2 are symmetrically fixedly arranged on the left and right sides between the upper and lower outer plates. In this embodiment, the taillight mounting plates 2 are welded to the upper and lower outer plates through welding points.

Among them, the inner plate structure includes an inner plate 5, a lock reinforcement plate 4 is fixedly arranged at the middle part of the bottom of the inner plate 5, hinge reinforcement plates 7 are arranged on both sides of the top of the inner plate 5, and gas spring reinforcement plates 6 are arranged on both sides of the middle of the inner plate 5.

Two hinge reinforcement plates 7 are provided, and the two hinge reinforcement plates 7 are symmetrically arranged on the top of the inner plate 5 .

Two gas spring reinforcement plates 6 are provided, and the two gas spring reinforcement plates 6 are symmetrically arranged in the middle of the inner plate 5 .

In this embodiment, the hinge reinforcement plate 7, the gas spring reinforcement plate 6, and the lock reinforcement plate 4 are all directly connected to the inner plate 5 through welding points and bolts.

When the inner plate structure and the outer plate structure are connected, the taillight mounting plate 2 is welded to the inner plate through welding points, and the upper outer plate 3 and the lower outer plate 1 are both connected to the inner plate 5 through flanges.

Among them, a window frame is set in the middle and upper part of the inner panel 5, and a V-shaped main rib 501 is set between the bottom of the window frame and the lock installation area of the inner panel. The V-shaped main rib 501 is V-shaped as a whole and is set from the lock installation area of the inner panel to the lower corner of the window frame. The V-shaped main rib 501 crosses the recessed position of the taillight box.

The lock installation area corresponds to the installation position of the lock reinforcement plate 4, and the recessed position of the tail light box corresponds to the installation position of the tail light installation plate.

A cross beam 505 is arranged in the middle of the V-shaped main reinforcement 501 and overlapped on the V-shaped main reinforcement. The cross beam 505 is arranged horizontally, and its two ends are connected between the two oblique reinforcements of the V-shaped main reinforcement 501.

The cross beam 505 is provided with a plurality of vertical ribs 502, which are arranged vertically, and part of the vertical ribs 502 overlaps the V-shaped main ribs 501 from the lower welding edge of the window frame. The vertical ribs 502 are fixedly connected between the bottom of the window frame and the V-shaped main ribs.

The plurality of vertical ribs 502 are disposed symmetrically. In this embodiment, six vertical ribs 502 may be provided, and the plurality of vertical ribs 502 are disposed in parallel and at intervals.

Through the coordination of V-shaped main reinforcement, horizontal beams and vertical reinforcement, the V-shaped main reinforcement is placed between the window frame and the lock installation area and crosses the taillight recess, so that the upper and lower force transmission paths are continuous, which can greatly compensate for the stiffness discontinuity problem caused by the recess of the through-type taillight box, ensure the continuity of the stiffness transmission path from the window frame to the side beam and the lock position, play a role in enhancing the bending resistance and improving the overall bending and torsional resistance of the tailgate.

Furthermore, side beams 510 are arranged on both sides of the inner panel 5, and an R-angle structure 507 with a height difference is formed at the overlap between the V-shaped main reinforcement 501 on the inner panel 5 and the side beams 510; the cross beam is connected to the outer panel, and a supporting leg 504 is arranged from the edge of the cross beam 505 at the lower end of the window frame to support the lower outer panel 1, so that a closed cavity structure is formed in the middle part of the inner panel by the supporting leg 504, the cross beam and the outer panel, and the cavity has good bending resistance, thereby improving the bending resistance of the back door at the recessed position of the taillight box.

Two R-angle structures are provided, and the two R-angle structures are provided symmetrically on the left and right.

A lock mounting boss 503 is set at the inner plate 5 corresponding to the lock reinforcement plate 4, and a hinge mounting boss 509 is set at the hinge reinforcement plate. The lock mounting boss 503 and the hinge mounting boss 509 both have R angles. Under the premise of ensuring the installation space, the installation point is as close to the R angle of the boss as possible, which effectively improves the rigidity of the connection point.

Two hinge mounting bosses are provided, and the two hinge mounting bosses are symmetrically arranged on the left and right.

In a further solution, welding edge corners 508 are set at the inner plate corresponding to the corners of the window frame. The upper and lower welding edges of the window frame span the four corners of the window frame. With the addition of welding edges at the corners, the rigidity of the corners is enhanced, thereby ensuring the overall bending and torsional resistance of the tailgate.

Four welding edge corners 508 are provided, and the four welding edge corners 508 are correspondingly placed at the four edge corners of the window frame.

The inner panel is provided with a plurality of weight-reducing holes 506 corresponding to the lower portion of the window frame. The weight-reducing holes 506 have flanges to ensure that the weight of the tailgate is reduced to the greatest extent without reducing the rigidity.

There are five weight-reducing holes 506 , which are respectively opened at the side and middle of the V-shaped main reinforcement and the middle of the crossbeam.

Among them, an upper outer panel boss 301 is arranged on the top of the upper outer panel 3, a spoiler mounting surface 302 is arranged on the upper outer panel corresponding to the bottom of the upper outer panel boss 301, and a window frame is arranged in the middle of the upper outer panel 3; the spoiler mounting surface 302 of the upper outer panel is made as narrow as possible, so that the upper outer panel boss 301 is as large as possible to increase the cross-section of the upper side beam of the window frame, thereby improving the stiffness of the spoiler mounting point and the overall stiffness of the upper side beam.

A plurality of taillight recessed bosses 303 are provided between the middle portion of the bottom of the upper outer panel and the lower outer panel, so as to enhance the rigidity and improve the bending resistance of the taillight box itself.

The taillight mounting plate 2 is provided with a plurality of inclined bosses 201, which are arranged at the upper and lower R angle positions of the taillight mounting plate. The bending resistance of the taillight box itself is improved by enhancing the rigidity of the inclined bosses.

In this embodiment, five bosses are provided at the recess of the taillight, and five inclined bosses are provided on one taillight mounting plate.

Among them, a through rib 702 is arranged in the middle of the hinge reinforcement plate 7. By arranging a large through rib 702 in the middle of the hinge reinforcement plate, the cavity area of the corner of the window frame can be increased; a plurality of flat ribs 701 are arranged on the through rib of the hinge reinforcement plate 7 and overlapped with the welding surface on the window frame, an upper end flange 703 and a row of welding points are arranged on the top of the hinge reinforcement plate 7, and a convex rib 704 and a row of welding points are arranged corresponding to the side of the upper end flange, which can improve the rigidity of the hinge installation point while improving the bending and torsion resistance of the corner.

The hinge reinforcing plate 7 is provided with a hinge mounting surface, and the flat rib is arranged at the lower end of the hinge mounting surface.

In this embodiment, three flat ribs 701 are provided, and the flat ribs and the through ribs 702 are substantially vertically arranged.

Among them, the upper end of the gas spring reinforcement plate crosses the lower R corner of the window frame, and the lower end crosses the cross-section of the taillight box. That is, the upper end of the gas spring reinforcement plate extends above the lower R corner of the window frame, and the lower end extends to below the taillight box, effectively compensating for the stiffness of the back door at the taillight box.

A through rib 602 is provided in the middle of the gas spring reinforcement plate 6, and a plurality of flanged weight-reducing holes 601 are provided on the through rib 602, so as to reduce the weight to the greatest extent while ensuring the continuity of the upper and lower rigidity.

The gas spring reinforcement plate 6 is provided with a gas spring mounting surface, and a circle of convex ribs 603 is added around the gas spring mounting surface to improve the local rigidity and load bearing capacity without increasing the weight.

In this embodiment, three flange weight-reducing holes are provided.

Among them, two widened and deepened flanges 402 are set on both sides of the lock reinforcement plate 4, the lower end of the lock reinforcement plate 4 is connected to the inner plate sealing surface through a structural adhesive groove 401, and a lock installation surface 403 is set in the middle of the lock reinforcement plate 4. Under the premise of ensuring the lock installation space, the lock installation surface 403 is made as narrow as possible, so as to improve the connection strength of the lock with the least material.

In this embodiment, two flanges 402 are provided, and the two flanges are symmetrically arranged on both sides of the lock reinforcement plate 4.

In another typical embodiment of the present invention, a car is provided, which includes the car tailgate structure as described above.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A car tailgate structure, characterized in that it comprises an outer panel structure and an inner panel structure connected to each other; the inner panel structure comprises an inner panel, a window frame is arranged at the middle and upper part of the inner panel, a V-shaped main rib is arranged between the bottom of the window frame and the lock installation area of the inner panel, the V-shaped main rib spans the recessed position of the taillight box, a crossbeam is arranged in the middle of the V-shaped main rib, and both ends of the crossbeam are fixedly connected to the V-shaped main rib. 2. The automobile tailgate structure as described in claim 1 is characterized in that the crossbeam is provided with a plurality of vertical ribs, the vertical ribs are overlapped from the lower end of the window frame to the V-shaped main ribs, and the plurality of vertical ribs are parallel and spaced apart. 3. The automobile tailgate structure as described in claim 1 is characterized in that side beams are arranged on both sides of the inner panel, and an R-angle structure is formed at the overlap between the V-shaped main reinforcement and the side beams; support legs are arranged on the edge of the cross beam to support the outer panel structure, so that the middle part of the inner panel, the taillight box and the outer panel structure form a closed cavity structure. 4. The automobile tailgate structure as described in claim 1 is characterized in that the inner plate is provided with welding corners corresponding to the corners of the window frame, and the inner plate is provided with a plurality of weight-reducing holes corresponding to the lower part of the window frame, and the weight-reducing holes have flanges. 5. The automobile tailgate structure as described in claim 1 is characterized in that a lock reinforcement plate is fixedly arranged at the middle part of the bottom of the inner panel, hinge reinforcement plates are arranged on both sides of the top of the inner panel, and gas spring reinforcement plates are arranged on both sides of the middle of the inner panel; a lock mounting boss is arranged on the inner panel corresponding to the lock reinforcement plate, and a hinge mounting boss is arranged on the inner panel at the hinge reinforcement plate, and both the lock mounting boss and the hinge mounting boss have an R angle. 6. The automobile tailgate structure as described in claim 5 is characterized in that a through rib is arranged in the middle of the hinge reinforcement plate, a plurality of flat ribs are arranged on the through rib and overlapped with the welding surface on the window frame, an upper end flange is arranged on the top of the hinge reinforcement plate, and a convex rib is arranged corresponding to the side of the upper end flange. 7. The automobile tailgate structure as described in claim 5 is characterized in that a through rib is arranged in the middle of the gas spring reinforcement plate, and a plurality of flanged weight-reducing holes are arranged on the through rib; the gas spring reinforcement plate is provided with a gas spring mounting surface, and convex ribs are arranged around the gas spring mounting surface; flanges are arranged on both sides of the lock reinforcement plate, the lower end of the lock reinforcement plate is connected to the sealing surface through a structural adhesive groove, and a lock mounting surface is arranged in the middle of the lock reinforcement plate. 8. The automobile tailgate structure as described in claim 1 is characterized in that the outer panel structure includes an upper outer panel, a bottom middle portion of the upper outer panel is fixedly connected to the lower outer panel, taillight mounting plates are arranged on both side portions between the upper outer panel and the lower outer panel, the taillight mounting plates are fixedly connected to the inner panel, and both the upper outer panel and the lower outer panel are connected to the inner panel by flanges. 9. The automobile tailgate structure as described in claim 8 is characterized in that the taillight mounting plate is provided with a plurality of inclined bosses, an upper outer panel boss is provided at the top of the upper outer panel, a spoiler mounting surface is provided on the upper outer panel corresponding to the bottom of the upper outer panel boss, a window frame is provided in the middle of the upper outer panel, and a plurality of taillight recessed bosses are provided between the middle part of the bottom of the upper outer panel and the lower outer panel. 10. An automobile, characterized in that it comprises the automobile tailgate structure according to any one of claims 1 to 9.