CN107487163B

CN107487163B - Tail door inner plate, tail door structure and vehicle with same

Info

Publication number: CN107487163B
Application number: CN201610973558.7A
Authority: CN
Inventors: 李建春
Original assignee: Beiqi Foton Motor Co Ltd
Current assignee: Beiqi Foton Motor Co Ltd
Priority date: 2016-10-28
Filing date: 2016-10-28
Publication date: 2020-04-14
Anticipated expiration: 2036-10-28
Also published as: CN107487163A

Abstract

The invention provides a tail gate inner plate, a tail gate structure and a vehicle with the tail gate inner plate and the tail gate structure. Wherein, tail-gate inner panel includes: an inner plate body; the first supporting structure for supporting the outer plate of the tail door is arranged on the inner plate body. The technical scheme of the invention can solve the problem that the outer plate of the tail door in the prior art is insufficient in strength and rigidity and easy to deform.

Description

Tail door inner plate, tail door structure and vehicle with same

Technical Field

The invention relates to the field of vehicles, in particular to a tail gate inner plate, a tail gate structure and a vehicle with the tail gate inner plate and the tail gate structure.

Background

In the prior art, as shown in fig. 1, the tailgate inner panel 10' is composed of only an inner panel body. A cavity is arranged between the tail door outer plate and the tail door inner plate 10', and a supporting structure is not arranged between the cavities. Because the inner plate of the tail door is not provided with a supporting structure, the rigidity and the strength of the outer plate of the tail door are insufficient; further, when people use the vehicle, the people may push the vehicle forward from the middle area of the tail gate and lean against the middle area of the tail gate, and the middle area of the outer plate of the tail gate is easy to deform under the action of external force.

Disclosure of Invention

The invention mainly aims to provide a tail door inner plate, a tail door structure and a vehicle with the tail door inner plate and the tail door structure, and aims to solve the problem that a tail door outer plate in the prior art is insufficient in strength and rigidity and easy to deform.

In order to achieve the above object, according to one aspect of the present invention, there is provided a tailgate inner panel including: an inner plate body; the first supporting structure for supporting the outer plate of the tail door is arranged on the inner plate body.

Furthermore, the inner plate body is provided with an avoiding through hole, and the first supporting structure comprises at least one flanging which is arranged on the edge of the avoiding through hole and used for being connected with the outer plate of the tail door.

Further, at least one of the flanges comprises a first flange and two second flanges which are oppositely arranged, and a triangle is limited by the two second flanges and the first flange.

Further, first turn-ups and second turn-ups all include the body and with the body connection the first limit of buckling, the first limit of buckling is dodged the inboard bending of through-hole towards.

Further, at least one turn-ups with dodge through-hole integrated into one piece.

Furthermore, the inner plate body is provided with lightening holes, the lightening holes and the avoiding through holes are arranged at intervals, and the first supporting structure further comprises a third flanging which is arranged at the edge of the lightening holes and used for being connected with the outer plate of the tail door.

Furthermore, one end of the third flanging, which is far away from the inner plate body, is provided with a second bent edge, and at least one flanging and/or the second bent edge is provided with a groove.

Furthermore, the number of the at least one flanging is one, the number of the lightening holes is two, the avoidance through hole is located between the two lightening holes, a third flanging is arranged at the edge of each lightening hole, and a triangle is defined by the two third flanging and the at least one flanging.

Furthermore, the tail door inner plate further comprises a second supporting structure connected with the door guard plate, and the second supporting structure is arranged on one side, deviating from the tail door outer plate, of the inner plate body.

Further, the second support structure is a fourth flanging arranged at the edge of the lightening hole.

Furthermore, the fourth flanging is provided with a second mounting through hole which is arranged corresponding to the first mounting through hole of the door guard plate.

According to another aspect of the present invention, a tailgate structure is provided, which includes a tailgate inner panel and a tailgate outer panel connected to the tailgate inner panel, where the tailgate inner panel is the tailgate inner panel.

Furthermore, the tail-gate inner panel is aforementioned tail-gate inner panel, and the tail-gate structure still includes mount pad and retaining member, and the mount pad setting is in first installation through-hole department, and the retaining member passes behind the second installation through-hole to be connected with the mount pad.

According to a third aspect of the present invention, there is provided a vehicle comprising a tailgate structure, the tailgate structure being the tailgate structure described above.

By applying the technical scheme of the invention, the tail door inner plate comprises an inner plate body and a first support structure arranged on the tail door inner plate, and the first support structure can be used for supporting the tail door outer plate so as to enhance the strength and rigidity of the tail door outer plate; further, the outer panel of the tailgate can be prevented from being deformed by an external force.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a block diagram of a prior art tailgate inner panel;

FIG. 2 shows a block diagram of an embodiment of a tailgate inner panel according to the present invention;

FIG. 3 shows a cross-sectional view A-A of the tailgate inner panel of FIG. 2 after assembly with the tailgate outer panel;

FIG. 4 shows a cross-sectional view B-B of the tailgate inner panel of FIG. 2 assembled with the tailgate outer panel;

FIG. 5 shows a cross-sectional view taken along line C-C of the tailgate inner panel of FIG. 2 assembled with the tailgate outer panel;

FIG. 6 shows an enlarged view of the tailgate inner panel of FIG. 2 at D;

FIG. 7 shows an enlarged view of the tailgate inner panel of FIG. 2 at E;

FIG. 8 shows an enlarged view at F of the tailgate inner panel of FIG. 2;

FIG. 9 shows an enlarged view of the tailgate inner panel of FIG. 5 at G

FIG. 10 shows a block diagram of an embodiment of a tailgate inner panel according to the present invention (a schematic view after turning 180 of FIG. 2);

FIG. 11 shows an enlarged view at H of the tailgate inner panel of FIG. 10;

FIG. 12 shows a cross-sectional view taken along line I-I of FIG. 10 after assembly of the tailgate inner panel with the tailgate outer panel and door trim;

FIG. 13 shows an enlarged view at J of FIG. 12; and

FIG. 14 shows an enlarged view of the tailgate inner panel of FIG. 10 assembled with the door trim.

Wherein the figures include the following reference numerals:

10. a tailgate inner panel; 11. an inner plate body; 12. a first support structure; 111. avoiding the through hole; 112. lightening holes; 121. a first flanging; 122. second flanging; 123. third flanging; 20. a tailgate outer panel; 214. a fourth flanging; 30. a second support structure; 40. and (4) a door guard plate.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

A vehicle includes a tailgate structure.

As shown in fig. 3 to 5, in the embodiment of the present invention, the tailgate structure includes a tailgate inner panel 10 and a tailgate outer panel 20 connected to the tailgate inner panel 10.

In the embodiment of the present invention, in order to improve the rigidity and strength of the tailgate structure, the structure of the tailgate inner panel 10 is improved, and the following is specifically described:

as shown in fig. 2, in the embodiment of the present invention, the tailgate inner panel 10 includes an inner panel body 11 and a first support structure 12 for supporting the tailgate outer panel 20. The first support structure 12 is provided on the inner panel body 11.

With the above arrangement, the strength and rigidity of the tailgate outer panel 20 can be improved. Through set up first bearing structure 12 on tail-gate inner panel 10, when tail-gate planking 20 is connected with tail-gate inner panel 10, utilize first bearing structure 12 can form the support to tail-gate planking 20 to improve the intensity, rigidity and the anti concave performance in the cavity region that tail-gate inner panel 10 and tail-gate planking 20 formed, avoid under the exogenic action tail-gate planking 20 to take place sunken deformation.

Preferably, as shown in fig. 2, in the embodiment of the present invention, the first supporting structure 12 is an integral structure with the inner panel body 11, and the first supporting structure 12 is formed by a flange made by the tailgate inner panel 10 itself. Compared with the supporting purpose achieved by adding parts on the tail gate inner plate 10, the first supporting structure 12 and the inner plate body 11 are arranged into an integral structure, the first supporting structure 12 can be directly formed on the sheet metal material for forming the tail gate inner plate 10 through a stamping process, the manufacturing is convenient, the manufacturing workload is reduced, the manufacturing difficulty is reduced, and the waste of materials can also be reduced; furthermore, the structural strength and rigidity of the tail gate can be improved under the condition that parts are not increased, the weight of the tail gate structure and the weight of a car body are reduced, and the requirements of people on light weight, energy conservation and emission reduction of the car are met.

As shown in fig. 2 and 3, in the embodiment of the present invention, the inner panel body 11 has an avoiding through hole 111, and the first support structure 12 includes at least one flange provided at an edge of the avoiding through hole 111 for connecting with the tailgate outer panel 20.

Preferably, at least one of the beads is integrally formed with the escape through hole 111.

Specifically, as shown in fig. 2 and 3, in the embodiment of the present invention, the first support structure 12 includes a first flange 121 disposed on the vehicle rear side of the escape through hole 111, and the first flange 121 is connected to the tailgate outer panel 20.

Through the arrangement, the avoiding through hole 111 can facilitate the installation of the tail door lock; the first flanging 121 arranged on one side of the avoiding through hole 111 can be used for connecting the tail door inner plate 10 and the tail door outer plate 20, so that the first flanging 121 can support the tail door outer plate 20 in the middle area of the tail door outer plate, and the strength and the rigidity of the tail door outer plate 20 are enhanced.

Preferably, first turn-ups 121 and inner panel plate body 11 structure as an organic whole, like this, can reserve the required material of the first turn-ups 121 of shaping when the blanking dodges through-hole 111, directly form first turn-ups 121 through blanking turn-ups technology, conveniently make, reduce the area of waste material panel beating, avoid the waste of material.

As shown in fig. 2 and 4, in the embodiment of the present invention, the first support structure 12 further includes a second flange 122 disposed at an edge of the avoiding through hole 111, and the first flange 121 and the second flange 122 are disposed at an interval.

By arranging the second flanging 122 and arranging the first flanging 121 and the second flanging 122 at intervals, multi-point support can be formed in the middle area of the tail door outer plate 20 corresponding to the avoidance through hole 111, and the strength and rigidity of the tail door outer plate 20 are improved.

Preferably, as shown in fig. 2 and 4, the at least one flange includes a first flange 121 and two second flanges 122 oppositely disposed, the first flange 121 is located between the two second flanges 122, and the two second flanges 122 and the one first flange 121 define a triangle.

Through the arrangement, the waste of sheet metal materials is reduced while the strength and the rigidity of the tail door outer plate 20 are improved. The triangular support formed by the two second flanges 122 and the first flange 121 can make the first support structure 12 support the tailgate outer panel 20 more stably, thereby further improving the strength and rigidity of the middle area of the tailgate outer panel 20, and making full use of the sheet metal material formed by blanking the avoiding through hole 111.

Specifically, as shown in fig. 2, the escape through hole 111 is a square hole. A first flange 121 and two second flanges 122 are respectively and correspondingly arranged on three sides of the square hole. Therefore, the three flanging structures can be formed simultaneously by blanking the sheet metal material formed by avoiding the through hole 111, and materials are fully utilized.

Of course, in an alternative embodiment not shown in the drawings, there may be only one cuff. For example, only one first flange 121 or only one second flange 122 is provided.

As shown in fig. 2 to 7, in the embodiment of the invention, each of the first flange 121 and the second flange 122 includes a body and a first bending edge connected to the body, and the first bending edge is bent toward the inner side of the avoiding through hole 111.

After the first bending edge is arranged, the first flanging 121 and the second flanging 122 can be better attached to the tail door outer plate 20, and the strength of the joint is improved. The first bent edge is bent toward the inner side of the avoiding through hole 111, so that a worker can conveniently connect the first flanging 121 and the second flanging 122 with the tail door outer panel 20 through the avoiding through hole 111.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the distance between the joints of the two second flanges 122 and the inner panel body 11 is L1, and the sum of the lengths of the two second flanges 122 is L. In order to meet the requirement of the stamping process, L1-L is more than or equal to 10 mm.

Preferably, as shown in fig. 2 to 7, the distance L1 between the joints of the two second flanges 122 and the inner panel body 11 is 263mm, the total length of the first flange 121 is 81mm, and the total length of each second flange 122 is 91 mm. The length of the body L3 of the first flange 121 is 59mm, the length of the first bending edge L4 of the first flange 121 is 22mm, and the total length of the first flange 121 is the sum of L3 and L4. The length of the body L5 of the second flange 122 is 70mm, the length of the first bending edge L6 of the second flange 122 is 21mm, and the total length of the second flange 122 is the sum of L5 and L6. Like this, two second turn-ups 122 centre when the blanking is not turned up leaves 81 mm's interval, can carry out the blanking turn-ups to this region completely from the technology angle, can reduce the area of waste material panel beating simultaneously.

As shown in fig. 3 and 6, in the embodiment of the present invention, in order to facilitate the forming of the first flange 121 by the stamping process and the connecting operation of the worker, the first flange 121 is angled with respect to the side of the inner panel body 11 facing the tailgate outer panel 20.

Specifically, in the embodiment of the present invention, an included angle between the first flange 121 and a side of the inner panel body 11 facing the tailgate outer panel 20 is greater than or equal to 90 ° and less than or equal to 150 °.

Preferably, the angle is 90 ° or more and 135 ° or less.

Preferably, as shown in fig. 6 and 7, the angle θ 1 between the first burring 121 and the side of the inner panel body 11 facing the tailgate outer panel 20 is 110 °. For the same reason, the second turned edge 122 also has an angle with the side of the inner panel 11 facing the tailgate outer panel 20, and the angle θ 2 between the second turned edge 122 and the side of the inner panel 11 facing the tailgate outer panel 20 is 100 °.

As shown in fig. 2 and 4, in the embodiment of the present invention, the inner panel body 11 has lightening holes 112, and the lightening holes 112 are spaced apart from the relief through holes 111.

The weight of the tailgate inner panel 10 can be reduced by providing the lightening holes 112 in the inner panel plate 11. The lightening holes 112 and the avoiding through holes 111 are arranged at intervals, so that the tail door inner plate 10 can have better strength and rigidity.

As shown in fig. 2 and 5, in the embodiment of the present invention, the first support structure 12 further includes a third flange 123 provided at the edge of the lightening hole 112 for connecting with the tailgate outer panel 20.

The third flanging 123 is arranged at the edge of the lightening hole 112, so that the first supporting structure 12 can form support in different areas of the tailgate outer panel 20, the strength and rigidity of the tailgate outer panel 20 are improved, and the tailgate outer panel 20 is prevented from sinking under the action of external force.

As shown in fig. 5 and 8, in the embodiment of the present invention, an end of the third turned edge 123 away from the inner panel body 11 has a second bent edge, and the second bent edge is provided with a groove.

The provision of the second bent edge may facilitate the connection of the third turned edge 123 with the tailgate outer panel 20. Specifically, as shown in fig. 9, a certain gap is left between the second bending edge and the tail gate outer plate 20 during installation, and the groove formed on the second bending edge is used for accommodating expansion glue, so that the third flange 123 is connected with the tail gate outer plate 20 through the expansion glue, and the welding connection is prevented from forming a welding spot on the tail gate outer plate 20, thereby improving the aesthetic property of the tail gate outer plate.

Specifically, as shown in fig. 4 and 7, in the embodiment of the present invention, the first bending edges of the two second flanges 122 are both provided with grooves. Similarly, the recess is used for holding the expansion glue to make second turn-ups 122 and tail-gate planking 20 pass through the expansion glue and be connected, avoid welded connection to form the solder joint on tail-gate planking 20, thereby improve the aesthetic property of tail-gate planking 20.

Preferably, in the embodiment of the present invention, in order to improve the connection strength, the first bent edge of the first flange 121 is welded to the tailgate outer panel 20.

Alternatively, the first bent edge of the first flange 121 may also be provided with a groove, and the first flange 121 is connected with the tailgate outer panel 20 through expansion glue.

As shown in fig. 2 and 5, there are two lightening holes 112, the avoidance through hole 111 is located between the two lightening holes 112, and a third flange 123 is disposed at an edge of each lightening hole 112.

Through the arrangement, the two lightening holes 112 can further lighten the weight of the tail gate inner plate 10, thereby being beneficial to realizing the light weight of a vehicle body. The two lightening holes 112 are respectively arranged at two sides of the avoiding through hole 111, and the edge of each lightening hole 112 is provided with a third flanging 123, so that the first supporting structure 12 is uniformly distributed in a cavity formed by the tail door inner plate 10 and the tail door outer plate 20, uniform support can be formed on the tail door outer plate 20, and the strength, the rigidity and the dent resistance of the tail door outer plate 20 are greatly improved.

Of course, in an alternative embodiment of the present invention, which is not shown, further, only one of the at least one flange may be, that is, the first flange 121 or the second flange 122, so that the two third flanges 123 and the first flange 121 or the two third flanges 123 and the second flange 122 may define a triangle, thereby making the support of the tail door outer panel 20 by the first support structure 12 more stable.

Specifically, as shown in fig. 2, the first supporting structure 12 includes a first flange 121, two second flanges 122, and two third flanges 123, which are relatively and uniformly distributed in a cavity formed by the tailgate inner panel 10 and the tailgate outer panel 20, so as to connect the tailgate outer panel 20 and the tailgate inner panel 10 into a whole, thereby improving the overall rigidity, strength, and NVH performance of the tailgate structure.

Preferably, the distance between the side surface of the second flange 122 close to the first flange 121 and the side wall of the avoidance through hole 111 connected with the first flange 121 is more than 10mm larger than the total length of the first flange 121. The widths of the first flange 121, the second flange 122 and the third flange 123 are all more than 40 mm. Thus, the requirement of the stamping process can be met, the first supporting structures 12 can be relatively uniformly distributed in the middle area of the tail door inner plate 10, and the overall rigidity and strength of the middle area of the tail door outer plate 20 can be relatively uniformly enhanced.

In order to meet the requirement of the punching process, the width L2 of the blanking area of the lightening hole 112 is 10mm larger than the total length of the third turned edge 123.

Preferably, as shown in fig. 2, the lightening hole 112 is a square hole, the width L2 of the lightening hole 112 is 176mm, and the total length of the third turned-up edge 123 is 157 mm. The length of the body L7 of the third flange 123 is 135mm, the length of the second bending edge L8 of the third flange 123 is 22mm, and the total length of the third flange 123 is the sum of L7 and L8. The angle θ 3 between the third flange 123 and the side of the inner panel body 11 facing the tailgate outer panel 20 is 92 °. Therefore, the area can be completely punched and flanged from the process angle, and meanwhile, materials can be fully utilized, and the area of waste metal plates is reduced.

Further, in order to improve the strength of the first, second, and

third flanges

121, 122, 123, the flanges are provided with reinforcing ribs along the length direction. The reinforcing rib is integrally formed with the flanging by a stamping process.

As shown in fig. 10, in the embodiment of the present invention, the tailgate inner panel 10 further includes a second support structure 30 for connecting with the door guard 40, and the second support structure 30 is disposed on a side of the inner panel body 11 facing away from the tailgate outer panel 20.

By providing the second support structure 30 on the side of the inner panel body 11 facing away from the tailgate outer panel 20, a mounting structure for the door guard 40 can be provided, and the door guard 40 is connected to the tailgate inner panel 10 via the second support structure 30.

As shown in fig. 10, in the embodiment of the present invention, the second support structure 30 is a fourth flange 214 disposed at the edge of the lightening hole 112, and the fourth flange 214 is an integral structure with the inner panel body 11.

Through the above arrangement, the fourth flange 214 can be directly formed by a stamping and flanging process, so that the mounting structure is provided for the door guard plate 40 under the condition of not increasing parts, the tail door structure is simplified, the weight of the tail door structure is reduced, blanking waste can be reduced, and material waste is avoided.

Specifically, two lightening holes 112 are respectively arranged on two sides of the avoiding through hole 111, and fourth flanges 214 are arranged at the edges of the two lightening holes 112. Thus, the two fourth flanges 214 can be connected to both sides of the door guard 40, respectively, so that the door guard 40 can be more stably connected to the rear door inner panel 10.

In order to meet the requirement of the stamping process, preferably, as shown in fig. 11, the maximum value of the length L9 of the fourth flange 214 is 45mm, the included angle θ 4 between the fourth flange 214 and the side of the inner panel body 11 facing the door panel 40 is 110 °, and the width of the fourth flange 214 itself is 40mm or more.

As shown in fig. 11 to 14, in the embodiment of the present invention, the fourth flange 214 has a first mounting through hole, and the door panel 40 has a second mounting through hole, and the first mounting through hole and the second mounting through hole are correspondingly disposed.

With the above arrangement, the door guard plate 40 can be conveniently mounted on the tailgate inner panel 10 through the second mounting through-hole and the first mounting through-hole of the fourth flange 214.

As shown in fig. 11 to 14, in the embodiment of the present invention, the tailgate structure further includes a mounting seat and a locking member, the mounting seat is disposed at the first mounting through hole, and the locking member passes through the second mounting through hole and then is connected to the mounting seat.

Specifically, the mounting seat is a plastic nut seat, and the locking piece is a self-tapping screw. The first mounting through hole is a square hole for mounting a plastic nut seat, the second mounting through hole is a round hole, and the tapping screw can be fixed on the plastic nut seat through the second mounting through hole on the door guard plate 40. During installation, the plastic nut seat is first snapped into the first installation through hole of the fourth flange 214, and the door panel 40 is then fixed to the plastic nut seat with self-tapping screws.

Further, as shown in fig. 11 and 14, in the embodiment of the present invention, in order to improve the strength and stability of the fourth flange 214, a triangular reinforcing rib is provided at the bottom of the fourth flange 214, i.e., at the connection between the fourth flange 214 and the edge of the lightening hole 112.

In the embodiment of the invention, seven flanges made from the inner plate of the tail gate are arranged in the middle area of the inner plate of the tail gate according to the size of the middle area range of the tail gate, the sizes of palms of both hands of people when the vehicle is used, and the calculation result of CAE rigidity analysis. The middle area is provided with three flanges which comprise a first flange and two second flanges, and two flanges which comprise two third flanges and two fourth flanges are respectively arranged at two sides of the inner plate close to the tail door. The first flanging, the second flanging and the third flanging are used for supporting the outer plate of the tail door, and the fourth flanging is used for fixing the door guard plate. Through the above-mentioned setting, the support of tail-gate inner panel to tail-gate outer panel has been realized, there is very big promotion to the anti concave rigidity of tail-gate outer panel, link together tail-gate outer panel and tail-gate inner panel in this region through gluing or welded mode simultaneously, make tail-gate outer panel and tail-gate inner panel form a cavity, not only realized tail-gate structural strength under the condition that does not increase the part, the promotion of rigidity and NVH performance, and the flange structure through tail-gate inner panel provides the fixed structure of installation for the door protection board, automobile body weight has still been alleviateed simultaneously, and realize through current technology easily, can not increase the manufacturing degree of difficulty, the material is reduced, manufacturing, cost such as management.

The tail gate structure with the tail gate inner plate can realize the installation of the gate guard plate, the rigidity performance of the tail gate structure is improved by about 2Hz, and the weight is reduced by about 1 kg. The vehicle with the tail gate structure can meet the requirements of improving the strength and the rigidity of the vehicle body and reducing the weight.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the first supporting structure comprises a first flanging and two second flanging which are arranged at the edge of the avoiding through hole, and a third flanging which is arranged at the edge of the two lightening holes, so that relatively uniform support is formed in the middle area of the tail door outer plate, the strength, the rigidity and the anti-concave performance of the tail door outer plate and the tail door structure are enhanced, and the tail door outer plate is prevented from deforming under the action of external force.

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

Claims

1. A tailgate inner panel, characterized in that the tailgate inner panel (10) comprises:

an inner plate body (11);

the first supporting structure (12) is used for supporting a tail door outer plate (20) and is arranged on the inner plate body (11);

the inner plate body (11) is provided with an avoiding through hole (111), and the first support structure (12) comprises at least one flanging which is arranged at the edge of the avoiding through hole (111) and is used for being connected with the tail door outer plate (20);

the inner plate body (11) is provided with lightening holes (112), the lightening holes (112) and the avoiding through holes (111) are arranged at intervals, and the first supporting structure (12) further comprises third flanging (123) which is arranged at the edge of the lightening holes (112) and used for being connected with the tail gate outer plate (20);

one end of the third flanging (123) far away from the inner plate body (11) is provided with a second bent edge, and a groove is arranged on at least one flanging and/or the second bent edge;

the tail door inner plate also comprises a second supporting structure (30) connected with a door guard plate (40), and the second supporting structure (30) is arranged on one side, away from the tail door outer plate (20), of the inner plate body (11);

the second support structure (30) is a fourth flanging (214) arranged at the edge of the lightening hole (112).

2. The tailgate inner panel according to claim 1, characterized in that the at least one bead comprises a first bead (121) and two second beads (122) disposed opposite to each other and the two second beads (122) and the one first bead (121) define a triangle.

3. The tailgate inner panel according to claim 2, wherein the first and second beads (121, 122) each comprise a body and a first bent edge connected to the body, the first bent edge being bent toward an inner side of the escape through hole (111).

4. The tailgate inner panel according to claim 1, characterized in that the at least one bead is integrally formed with the escape through hole (111).

5. The tailgate inner panel according to claim 1, wherein the at least one flange is one, the lightening holes (112) are two, the avoiding through hole (111) is located between the two lightening holes (112), a third flange (123) is arranged at an edge of each lightening hole (112), and the two third flanges (123) and the at least one flange define a triangle.

6. The tailgate inner panel according to claim 1, characterized in that the fourth bead (214) has a second mounting through hole provided corresponding to the first mounting through hole of the door guard plate (40).

7. A tailgate structure comprising a tailgate inner panel and a tailgate outer panel (20) connected to the tailgate inner panel, characterized in that the tailgate inner panel is the tailgate inner panel (10) according to any one of claims 1 to 6.

8. The tailgate structure according to claim 7, further comprising a mounting seat disposed at the first mounting through hole and a locking member connected to the mounting seat after passing through the second mounting through hole.

9. A vehicle comprising a tailgate structure, characterized in that the tailgate structure is a tailgate structure according to claim 7 or 8.