Back door assembly and vehicle

Abstract

The invention relates to a back door assembly and a vehicle. The back door assembly is applied to the vehicle. The back door assembly comprises an inner plate, an outer plate, an inner reinforcing plate and a connecting plate. The outer plate is connected with the inner plate, so that an assembling space of the back door assembly is formed between the inner plate and the outer plate; the outer plate comprises a bracket hole communicated with the assembly space; the inner reinforcing plate is arranged in the assembling space and is connected with the inner plate; the inner reinforcing plate comprises a vertical plate and a transverse plate; the vertical plates comprise the first vertical plate and the second vertical plate which extend in the height direction. The transverse plates comprise the first transverse plate and the second transverse plate which are distributed in the height direction at intervals. One end of the first transverse plate and one end of the second transverse plate are fixedly connected with the first vertical plate, and the other end of the first transverse plate and the other end of the second transverse plate are fixedly connected with the second vertical plate to form an annular space of the inner reinforcing plate. The connecting plate is arranged in the assembling space and is connected with the transverse plate; the connecting plate comprises a first connecting hole communicated with the bracket hole; the first connecting hole is used for being connected with a spare tire support arranged on the side, away from the assembling space, of the outer plate.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a tailgate assembly and a vehicle. Background Technology

[0002] Currently, off-road vehicles use side-opening tailgates. The spare tire is mounted on the tailgate assembly, increasing its weight to over 70kg. Traditional liftgates typically weigh less than 40kg. Therefore, from a weight perspective, side-opening tailgates place higher demands on the structural strength of the tailgate assembly.

[0003] Furthermore, off-road vehicles need to meet a variety of different off-road scenarios. The gradient of inclines and the magnitude of acceleration experienced by off-road vehicles differ significantly from those of conventional vehicles. These driving scenarios place high demands on the structural strength of the vehicle's tailgate assembly. Summary of the Invention

[0004] This application provides a tailgate assembly and a vehicle to address some or all of the shortcomings in the related technology.

[0005] A first aspect of this application provides a tailgate assembly for use in a vehicle; the tailgate assembly includes: Inner panel; An outer panel, connected to the inner panel, forms an assembly space for the rear door assembly between the inner panel and the outer panel; the outer panel includes a bracket hole communicating with the assembly space; An inner reinforcing plate is disposed in the assembly space and connected to the inner plate; the inner reinforcing plate includes vertical plates and horizontal plates; the vertical plates include a first vertical plate and a second vertical plate extending along the height direction; the horizontal plates include a first horizontal plate and a second horizontal plate spaced apart along the height direction; one end of the first horizontal plate and the second horizontal plate are respectively fixedly connected to the first vertical plate, and the other end are respectively fixedly connected to the second vertical plate to form an annular space of the inner reinforcing plate; and, A connecting plate is disposed in the assembly space and connected to the horizontal plate; the connecting plate includes a first connecting hole communicating with the bracket hole; the first connecting hole is used to connect a spare tire bracket disposed on the side of the outer plate away from the assembly space.

[0006] Furthermore, the inner panel includes an upper part and a lower part distributed along the height direction; the upper part is provided with a back window space; the first horizontal plate is connected to the lower part and is close to the upper part relative to the second horizontal plate; wherein, the vertical plate extends from the lower part to the upper part and extends along a portion of the edge of the back window space.

[0007] Furthermore, the inner panel includes an upper part and a lower part distributed along the height direction; the lower part is provided with a ventilation space; the horizontal plate is connected to the lower part; the first horizontal plate is disposed on the side of the ventilation space near the upper part, and the second horizontal plate is disposed on the side of the ventilation space away from the upper part; the ventilation space is exposed from the annular space.

[0008] Furthermore, the connecting plate includes two parts, referred to as the upper connecting beam and the lower connecting beam respectively; the upper connecting beam is connected to the first horizontal plate; and the lower connecting beam is connected to the second horizontal plate.

[0009] Further, the upper connecting beam includes a first connecting area, an upper support area, and a second connecting area distributed sequentially along the height direction; the first connecting area and the second connecting area are connected to the first horizontal plate; a gap exists between the upper support area and the first horizontal plate; the first connecting hole is disposed in the upper support area; and / or, The lower connecting beam includes a third connecting region, a lower support region, and a fourth connecting region distributed sequentially along the height direction; the third connecting region and the fourth connecting region are connected to the second horizontal plate; there is a gap between the lower support region and the second horizontal plate; the first connecting hole is provided in the lower support region.

[0010] Further, the inner panel includes an upper portion and a lower portion distributed along the height direction; the distance between the upper portion and the outer panel is smaller than the distance between the lower portion and the outer panel; the tailgate assembly further includes: An outer reinforcing plate is disposed in the assembly space; the outer reinforcing plate is disposed between the inner reinforcing plate and the outer plate, and is connected to the outer plate and the lower part via the annular space.

[0011] Furthermore, the lower part is provided with a ventilation space; the inner plate includes a first reinforcing beam and a second reinforcing beam disposed in the ventilation space; the first reinforcing beam and the second reinforcing beam are distributed along the width direction; the width direction is perpendicular to the height direction; The outer reinforcing plate includes a first side reinforcing portion, a middle reinforcing portion, and a second side reinforcing portion connected along the width direction; the end of the first side reinforcing portion away from the middle reinforcing portion is connected to the outer plate; the end of the second side reinforcing portion away from the middle reinforcing portion is connected to the inner plate. The two ends of the intermediate reinforcing section are respectively connected to the first reinforcing beam and the second reinforcing beam, and the middle area abuts against the outer plate.

[0012] Furthermore, a gap exists between the region of the first side reinforcement near the middle reinforcement and the outer panel, so as to form an installation space between the first side reinforcement and the outer panel for accommodating the lock actuator in the back door assembly; and / or, There is a gap between the region of the second side reinforcement near the middle reinforcement and the inner plate, so that a portion of the second side reinforcement fits into the outer plate; and / or, The intermediate reinforcement also includes a support unit disposed in the intermediate region; the support unit extends away from the intermediate region along the height direction and its end is connected to the inner plate.

[0013] Furthermore, the outer reinforcing plate includes an adhesive groove; the adhesive groove is disposed on the side of the outer reinforcing plate facing the outer panel; the back door assembly also includes an adhesive layer; the adhesive layer is located in the adhesive groove and connects the outer reinforcing plate and the outer panel.

[0014] Furthermore, the outer plate includes a pad hole; the connecting plate also includes a second connecting hole; the second connecting hole communicates with the pad hole; the second connecting hole is used to connect a spare tire support pad disposed on the side of the outer plate away from the assembly space.

[0015] A second aspect of this application provides a vehicle including the tailgate assembly described in the foregoing embodiments.

[0016] The technical solutions provided by the embodiments of this application may include the following beneficial effects: As can be seen from the above embodiments, the horizontal and vertical plates of the inner reinforcing plate of this application are fixedly connected to form a single integral plate, which can be supplied as a complete component. This arrangement not only improves assembly efficiency but also enhances the structural strength of the inner reinforcing plate. The connection between the horizontal and vertical plates forms an annular space, which helps reduce the overall weight of the inner reinforcing plate and enhances the uniformity of force transmission, avoiding stress concentration. The tailgate assembly of this application also uses a connecting plate to connect the spare tire bracket, thereby improving the connection stability and strength of the spare tire bracket. This arrangement helps reduce the strength requirements of the inner reinforcing plate in the tailgate assembly, reducing costs and controlling the weight of the inner reinforcing plate.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An exploded view of one embodiment of the rear door assembly of this application is shown; Figure 2 The diagram shown is a plan view of one embodiment of the rear door assembly of this application, wherein... Figure 2 The outer panel has been removed; Figure 3 Shown as Figure 1 A plan view of the inner reinforcing plate of the tailgate assembly shown; Figure 4 Shown as Figure 1 A three-dimensional schematic diagram of the inner reinforcing plate of the tailgate assembly shown; Figure 5 A plan view of one embodiment of the connecting plate of the rear door assembly of this application is shown; Figure 6 A perspective view of another embodiment of the connecting plate of the rear door assembly of this application is shown; Figure 7 The diagram shows an overall schematic representation of an embodiment of the outer reinforcing plate of the rear door assembly of this application; Figure 8 Shown as Figure 7 The diagram shows a plan view of the outer reinforcing plate.

[0020] Explanation of reference numerals in the attached figures; 100 rear door assembly; 1 Inner panel, 11 Upper part, 111 Back window space, 12 Lower part, 121 Ventilation space, 13 First reinforcing beam, 14 Second reinforcing beam; 2. Outer panel; 21. Bracket hole; 22. Window space; 23. Pad hole; 3. Assembly space; 4 Inner reinforcing plate, 41 Vertical plate, 411 First vertical plate, 4111 First window reinforcing part, 412 Second vertical plate, 4121 Second window reinforcing part, 4122 Hinge nut plate, 42 Horizontal plate, 421 First horizontal plate, 422 Second horizontal plate, 43 Annular space, 44 Assembly surface, 45 Connecting surface; 5 Connecting plate, 51 First connecting hole, 52 Upper connecting beam, 521 First connecting area, 522 Upper support area, 523 Second connecting area, 53 Lower connecting beam, 531 Third connecting area, 532 Lower support area, 533 Fourth connecting area, 54 Second connecting hole, 55 First connecting part, 551 Assembly structure, 56 Second connecting part, 57 Weight reduction hole; 6. Outer reinforcing plate, 61. First side reinforcing part, 611. First side support, 612. Abutment area, 613. Assembly area, 62. Middle reinforcing part, 621. First middle support, 622. Second middle support, 63. Second side reinforcing part, 631. Second side support, 632. Third side support, 64. Glue tank; Fr in front, Bc behind, Lf to the left, Rt to the right, Tp above, Bt below. Detailed Implementation

[0021] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0022] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0023] This application provides a vehicle. The vehicle includes a tailgate assembly. The tailgate assembly will be described below with reference to the accompanying drawings. (Reference) Figure 1 and Figure 2 For the sake of brevity, this application defines the width, thickness, and height directions as reference directions, which are perpendicular to each other. Specifically, the thickness direction, as indicated in the accompanying drawings, is distributed along the front (Fr) and rear (Bc) of the vehicle; the width direction is distributed along the left (Lf) and right (Rt) of the vehicle; and the height direction is distributed along the top (Tp) and bottom (Bt) of the vehicle. In the following description, we will use "front Fr," "rear Bc," "left Lf," "right Rt," "top Tp," and "bottom Bt" to more concisely and clearly illustrate the tailgate assembly 100 of this application. However, it should be understood that these directional descriptions should not be construed as restrictive, but only as illustrative in conjunction with the accompanying drawings.

[0024] The rear door assembly 100 of this application includes an inner panel 1, an outer panel 2, an inner reinforcing plate 4, and a connecting plate 5. The outer panel 2 is connected to the inner panel 1 to form an assembly space 3 for the rear door assembly 100 between the inner panel 1 and the outer panel 2. The inner reinforcing plate 4 is disposed in the assembly space 3 and connected to the inner panel 1. The inner reinforcing plate 4 includes a vertical plate 41 and a horizontal plate 42. The vertical plate 41 includes a first vertical plate 411 and a second vertical plate 412 extending along the height direction. The horizontal plate 42 includes a first horizontal plate 421 and a second horizontal plate 422 spaced apart along the height direction. One end of the first horizontal plate 421 and the second horizontal plate 422 are respectively fixedly connected to the first vertical plate 411, and the other end is respectively fixedly connected to the second vertical plate 412 to form an annular space 43 for the inner reinforcing plate 4. The connecting plate 5 is disposed in the assembly space 3 and connected to the horizontal plate 42. The outer panel 2 includes a bracket hole 21 communicating with the assembly space 3. The connecting plate 5 includes a first connecting hole 51 communicating with the bracket hole 21. The first connecting hole 51 is used to connect the spare tire bracket located on the side of the outer panel 2 away from the assembly space 3.

[0025] In this application, the horizontal plate 42 and vertical plate 41 of the inner reinforcing plate 4 are fixedly connected to form a single integral plate. Compared to the technical solution where the first vertical plate 411, the second vertical plate 412, the first horizontal plate 421, and the second horizontal plate 422 are each individually connected to the inner plate 1, the inner reinforcing plate 4 of this application is supplied as a single component, which not only improves assembly efficiency but also enhances the structural strength of the inner reinforcing plate 4 due to the overall structure. The connection between the horizontal plate 42 and the vertical plate 41 forms an annular space 43, which helps reduce the overall weight of the inner reinforcing plate 4 and also enhances the uniformity of force transmission, avoiding stress concentration. The tailgate assembly 100 of this application also uses a connecting plate 5 to connect the spare tire bracket, thereby improving the connection stability and strength of the spare tire bracket. This arrangement helps reduce the strength requirements of the inner reinforcing plate 4 in the tailgate assembly 100, and helps reduce costs and control the weight of the inner reinforcing plate 4.

[0026] The first vertical plate 411, the second vertical plate 412, the first horizontal plate 421, and the second horizontal plate 422 can be fixedly connected by welding, thereby reducing production difficulty. Alternatively, in other embodiments, the inner reinforcing plate 4 can also be integrally formed, thereby improving the structural strength of the inner reinforcing plate 4.

[0027] In some optional embodiments, the first vertical plate 411 is a lock reinforcement plate and the second vertical plate 412 is a hinge reinforcement plate. Taking the embodiment shown in the attached drawings as an example, the first vertical plate 411 and the second vertical plate 412 are located on the left side Lf and right side Rt of the back door assembly 100, respectively. Therefore, in this embodiment, the door lock of the back door assembly 100 is located on the left side Lf, and the hinge is located on the right side Rt. When a person opens the back door assembly 100 from the outer panel 2 side, they need to manually operate the door lock on the left side Lf of the back door assembly 100 and apply force to make the back door assembly 100 pivot around the pivot axis on the right side Rt to open. In this embodiment, the second vertical plate 412 can be connected to a hinge nut plate 4122, so that the second vertical plate 412 can have the function of directly connecting with the hinge.

[0028] Of course, in other embodiments, the first vertical plate 411, serving as a lock reinforcement plate, can be positioned on the right side Rt, and the second vertical plate 412, serving as a hinge reinforcement plate, can be positioned on the left side Lf. That is, in the embodiment shown in the accompanying drawings, the hinge reinforcement plate is located on the left side Lf, and the lock reinforcement plate is located on the right side Rt. It should be understood that when the first vertical plate 411 is a lock reinforcement plate, it does not mean that the first vertical plate 411 needs to be directly connected to the lock actuator, handle, latch, or other door lock structure of the back door assembly 100. Rather, it should be understood that the lock reinforcement plate provides structural reinforcement in the back door assembly 100 corresponding to the door lock's mounting position. In this embodiment, the door lock and the first vertical plate 411 have a projection overlap in the thickness direction, for example, a projection overlap with the entire door lock, or a projection overlap with any component of the door lock. Similarly, the second vertical plate 412, serving as a hinge reinforcement plate, has a projection overlap with the hinge of the back door assembly 100 in the thickness direction.

[0029] The inner panel 1 includes an upper part 11 and a lower part 12 distributed along the height direction. The upper part 11 is provided with a rear window space 111. In this embodiment, the outer panel 2 may be provided with a window space 22 communicating with the rear window space 111. The tailgate assembly 100 may be fitted with glass to enclose the window space 22 and the rear window space 111. This embodiment allows occups to observe the environment behind the vehicle Bc from inside the vehicle via the rear window space 111. Alternatively, occups can observe the environment inside the vehicle from outside the vehicle via the window space 22 of the rear Bc. In this embodiment, the first horizontal plate 421 is connected to the lower part 12 and is closer to the upper part 11 than the second horizontal plate 422. In other words, the annular space 43 of the inner reinforcing plate 4 is provided in the lower part 12. Since the upper part 11, which is provided with the rear window space 111, generally only needs to facilitate observation, the tailgate assembly 100 has lower strength requirements for the upper part 11. The assembly space 3 usually has more functional components in the lower part 12, so the inner reinforcing plate 4 is placed in the space of the lower part 12 to improve the structural strength of the tailgate assembly 100.

[0030] Furthermore, the vertical panel 41 extends from the lower part 12 to the upper part 11, and extends along a portion of the edge of the back window space 111. Combined with... Figure 3 and Figure 4 The first vertical plate 411 includes a first window reinforcement 4111 extending from the first horizontal plate 421 away from the second horizontal plate 422. The second vertical plate 412 includes a second window reinforcement 4121 extending from the first horizontal plate 421 away from the second horizontal plate 422. During subsequent glass assembly of the rear door assembly 100, the first window reinforcement 4111 and the second window reinforcement 4121 can improve the strength of the window frame corner, preventing damage to the glass due to stress or deformation of the inner panel 1 after glass assembly due to insufficient strength. Therefore, the provision of the first window reinforcement 4111 and the second window reinforcement 4121 can further improve the structural strength of the rear door assembly 100.

[0031] It should be noted that the inner reinforcing plate 4 may only have the first window reinforcing part 4111 provided on the first vertical plate 411. Alternatively, the inner reinforcing plate 4 may only have the second window reinforcing part 4121 provided on the second vertical plate 412. Those skilled in the art can adjust the height of the vertical plate 41 extending along the edge of the back window space 111 according to factors such as the internal space of the space and the strength of the inner plate 1.

[0032] In an embodiment where a back window space 111 is provided in the upper part 11, the first horizontal plate 421 can be used as a wiper reinforcement plate, that is, to improve the structural strength of the wiper mounting position of the tailgate assembly 100. In this embodiment, the wiper and the first horizontal plate 421 have projected overlap in the thickness direction. In an optional embodiment, the second horizontal plate 422 can be used as a strut reinforcement plate, that is, to improve the structural strength of the strut mounting position of the tailgate assembly 100. In this embodiment, the strut and the second horizontal plate 422 have projected overlap. It can be seen that the combination of the annularly arranged first vertical plate 411, second vertical plate 412, first horizontal plate 421 and second horizontal plate 422 can comprehensively strengthen the structural strength of the inner panel 1 in the assembly space 3, and can also be used to provide different structural reinforcement functions for different components.

[0033] In an optional embodiment, the thickness of the horizontal plate 42 is less than the thickness of the vertical plate 41. In this embodiment, the thicknesses of the first horizontal plate 421 and the second horizontal plate 422 can be the same or different, thereby providing corresponding support for the structural strength requirements of different components. Similarly, the thicknesses of the first vertical plate 411 and the second vertical plate 412 can be the same or different. However, it should be understood that in this embodiment, the minimum thickness of the first vertical plate 411 and the second vertical plate 412 is greater than the maximum thickness of the first horizontal plate 421 and the second horizontal plate 422.

[0034] As mentioned above, the first vertical plate 411 and the second vertical plate 412 are typically used as hinge reinforcement plates and lock reinforcement plates. Therefore, the first vertical plate 411 and the second vertical plate 412 are the main locations where personnel apply force or where heavy components are located. The first horizontal plate 421 and the second horizontal plate 422 are used as reinforcement plates for small components such as wipers and struts. Therefore, in this embodiment, the thickness of the vertical plate 41 is set to be greater than the thickness of the horizontal plate 42, so that the inner reinforcement plate 4 can have a greater thickness in the locations where structural strength needs to be strengthened to ensure the structural reinforcement effect, while having a smaller thickness in the locations where high strength is not required to improve the overall lightweight of the inner reinforcement plate 4, thereby reducing the overall weight of the tailgate assembly 100.

[0035] The vertical plate 41 includes an assembly surface 44 and a connecting surface 45 arranged opposite each other along the thickness direction. The assembly surface 44 is connected to the inner plate 1. The first horizontal plate 421 and the second horizontal plate 422 are both connected to the connecting surface 45. In this embodiment, the vertical plate 41 is located in front of the horizontal plate 42 and closer to the inner plate 1. Thus, when connecting the inner reinforcing plate 4 and the inner plate 1, the connection strength between the vertical plate 41 and the inner plate 1 can be effectively guaranteed, avoiding the gap between them from affecting the strength improvement effect of the vertical plate 41. As mentioned above, the horizontal plate 42 is used to strengthen the strength of the parts with lower strength requirements, so the horizontal plate 42 is far away from the inner plate 1 relative to the vertical plate 41, which also ensures the structural strength of the horizontal plate 42.

[0036] It should be understood that the inner reinforcing plate 4 is a sheet metal part. Therefore, even if the horizontal plate 42 is farther away from the inner plate 1 than the vertical plate 41, in embodiments where no other reinforcing structure is provided between the inner reinforcing plate 4 and the inner plate 1, the horizontal plate 42 is directly connected to the inner plate 1, rather than being spaced apart.

[0037] When the tailgate assembly 100 is closed, the air inside the vehicle needs to be expelled. In an optional embodiment, a ventilation space 121 is provided in the lower part 12. A horizontal plate 42 is connected to the lower part 12, with a first horizontal plate 421 located on the side of the ventilation space 121 closer to the upper part 11 and a second horizontal plate 422 located on the side of the ventilation space 121 away from the upper part 11. The ventilation space 121 protrudes from the annular space 43. A pressure relief valve can be subsequently assembled on the outer panel 2, allowing the tailgate assembly 100 to expel air through the ventilation space 121 and the annular space 43. The ventilation space 121 not only enables the effective closure of the tailgate assembly 100 but also reduces the weight of the inner panel 1, thereby controlling the overall weight of the tailgate assembly 100. The first horizontal plate 421 and the second horizontal plate 422 are respectively located above the ventilation space 121 (Tp) and below it (Bt), allowing the inner reinforcing plate 4 to improve the structural strength of the inner panel 1 with the ventilation space 121.

[0038] To accommodate structures such as wipers, struts, hinges, and lock actuators within the assembly space 3, in an optional embodiment, the lower part 12 protrudes away from the outer plate 2, such that the distance between the upper part 11 and the outer plate 2 is less than the distance between the lower part 12 and the outer plate 2. In this embodiment, the distance between the area of ​​the inner reinforcing plate 4 near the annular space 43 and the outer plate 2 is greater than the distance between the area of ​​the inner reinforcing plate 4 away from the annular space 43 and the outer plate 2. That is, the annular space 43 is recessed from the assembly surface 44 toward the connecting surface 45, thereby conforming to the shape of the lower part 12 and improving the structural strength of the inner plate 1.

[0039] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 The following section will provide a detailed explanation of the structure of the connecting plate 5 of the tailgate assembly 100.

[0040] There may be only one connecting plate 5, located between the upper part 11 and the lower part 12, or located on the side of the lower part 12 away from the upper part 11. Alternatively, in an optional embodiment, there may be two connecting plates 5, referred to as an upper connecting beam 52 and a lower connecting beam 53. The upper connecting beam 52 is connected to the first horizontal plate 421. The lower connecting beam 53 is connected to the second horizontal plate 422. Thus, there are also multiple first connecting holes 51, and since the first horizontal plate 421 and the second horizontal plate 422 are distributed along the height direction, the multiple first connecting holes 51 are also distributed along the height direction. When the tailgate assembly 100 is subsequently connected to a spare tire bracket, the upper connecting beam 52 and the lower connecting beam 53 can provide multiple mounting points and fixing points for the spare tire bracket in the height direction, thereby improving the connection stability of the spare tire bracket and enhancing the structural strength of the tailgate assembly 100 in multiple places, preventing the spare tire bracket from exerting force on the outer plate 2 due to excessive acceleration during vehicle operation, which could cause deformation and damage to the tailgate assembly 100.

[0041] Optionally, the connecting plate 5 includes a first connecting portion 55 and a second connecting portion 56. One end of the first connecting portion 55 is connected to the second connecting portion 56, and the other end is connected to the inner panel 1. The end of the second connecting portion 56 away from the first connecting portion 55 is connected to the inner panel 1. The first connecting portion 55 includes an assembly structure 551. A first connecting hole 51 is provided in the assembly structure 551. The first connecting portion 55 and the second connecting portion 56 extend in different directions, allowing the first connecting portion 55 to form a gap with the inner panel 1 at least at the assembly structure 551. With this arrangement, a gap exists between the connecting plate 5 and the inner panel 1 in the thickness direction at the location where the first connecting hole 51 is provided, forming a buffer cavity. When the tailgate assembly 100 is connected to the spare tire bracket and the spare tire bracket applies force along the thickness direction from the connecting plate 5 towards the inner panel 1, even if the connecting plate 5 deforms under force, the presence of the buffer cavity can protect the inner panel 1 to a certain extent from deformation. Thus, the connecting plate 5 can improve the structural strength of the tailgate assembly 100 after the spare tire bracket is connected.

[0042] It should be noted that the connection between the first connecting part 55 and the inner plate 1 and the connection between the second connecting part 56 and the inner plate 1 described herein can be understood as a direct connection, that is, there is no inner reinforcing plate 4 between a part of the connecting plate 5 and the inner plate 1, or it can be understood as an indirect connection, that is, the connecting plate 5 as a whole is connected to the inner plate 1 via the inner reinforcing plate 4.

[0043] Specifically, taking the above connecting beam 52 as an example, refer to... Figure 5 The upper connecting beam 52 includes a first connecting region 521, an upper support region 522, and a second connecting region 523, which are sequentially distributed along the height direction. The first connecting region 521 and the second connecting region 523 are connected to the first horizontal plate 421. There is a gap between the upper support region 522 and the first horizontal plate 421. A first connecting hole 51 is provided in the upper support region 522. In this embodiment, the position between the first connecting region 521 and the upper support region 522 should be understood as the second connecting part 56, which extends from the front Fr to the rear Bc along the thickness direction; the upper support region 522 and the second connecting region 523 should be understood as the first connecting part 55, which extends from the upper Tp to the lower Bt along the height direction, so that the extension directions of the first connecting part 55 and the second connecting part 56 are different. Since the upper connecting beam 52 and the inner plate 1 are distributed along the thickness direction, the setting of the second connecting part 56 makes the first connecting part 55 and the inner plate 1 have a gap in the thickness direction, thereby making the setting position of the assembly structure 551 have a gap with the inner plate 1, forming a buffer cavity.

[0044] The following connecting beam 53 is used as an example for reference. Figure 6The lower connecting beam 53 includes a third connecting region 531, a lower support region 532, and a fourth connecting region 533, which are sequentially distributed along the height direction. The third connecting region 531 and the fourth connecting region 533 are connected to the second horizontal plate 422. There is a gap between the lower support region 532 and the second horizontal plate 422. A first connecting hole 51 is provided in the lower support region 532. In this embodiment, the position between the third connecting region 531 and the lower support region 532 should be understood as the second connecting part 56, extending from the front Fr to the rear Bc along the thickness direction; the lower support region 532 and the fourth connecting region 533 should be understood as the first connecting part 55, extending from the upper Tp to the lower Bt along the height direction, so that the extension directions of the first connecting part 55 and the second connecting part 56 are different. Since the lower connecting beam 53 and the inner plate 1 are distributed along the thickness direction, the second connecting portion 56 extending along the thickness direction can increase the distance between the first connecting portion 55 and the inner plate 1 at least at the position of the assembly structure 551, thereby enabling a buffer cavity to be formed between the lower connecting beam 53 and the inner plate 1.

[0045] Since the first connecting hole 51 is located in the first connecting portion 55 and needs to communicate with the bracket hole 21, the first connecting portion 55 needs to be oriented towards the outer plate 2, that is, it extends substantially along the height direction. In an embodiment where the lower portion 12 protrudes away from the outer plate 2, making the distance between the upper portion 11 and the outer plate 2 smaller than the distance between the lower portion 12 and the outer plate 2, the second connecting portion 56 connected to the first connecting portion 55 needs to extend a longer distance along the thickness direction in order to connect with the inner plate 1. Therefore, this embodiment can maximize the volume of the buffer cavity, allowing the connecting plate 5 to provide a better buffering effect.

[0046] To further ensure the buffering effect of connecting plate 5, such as Figure 5 As shown, in an optional embodiment, the assembly structure 551 protrudes from the first connecting portion 55, and its extension direction is opposite to that of the second connecting portion 56. Taking the first connecting portion 55 as a reference, the second connecting plate 5 can be understood as extending from the rear Bc towards the front Fr; therefore, the assembly structure 551 in this embodiment can be understood as extending from the front Fr towards the rear Bc. Since the connecting plate 5 is a sheet metal part, the protrusion of the assembly structure 551 further increases the distance between the surface of the assembly structure 551 facing the inner plate 1 and the inner plate 1, thereby further ensuring that a buffer cavity can be formed between the assembly structure 551 and the inner plate 1, achieving effective load-bearing and stress distribution.

[0047] In some other alternative embodiments, such as Figure 6As shown, the assembly structure 551 is disposed at the connection end between the first connecting portion 55 and the second connecting portion 56. The assembly structure 551 extends away from the first connecting portion 55, and the extension direction is the same as the extension direction of the first connecting portion 55. As mentioned above, the first connecting portion 55 extends substantially along the height direction; therefore, in this embodiment, the assembly structure 551 extends along the height direction and away from the first connecting portion 55. Thus, the assembly structure 551 in this embodiment can be understood as being protruding. The connecting plate 5 in this embodiment can serve as the lower connecting beam 53, and the assembly structure 551 extends toward the upper connecting beam 52. In this way, the distance in the height direction between the first connecting hole 51 of the upper connecting beam 52 and the first connecting hole 51 of the lower connecting beam 53 can be reduced, thereby adapting to the connecting hole of the spare tire bracket without requiring an additional spare tire bracket design for the vehicle. Of course, this embodiment can also be used as the upper connecting beam 52 to increase the distance between the first connecting hole 51 of the lower connecting beam 53 and the first connecting hole 51 of the upper connecting beam 52. This application is not limited in this respect.

[0048] In an optional embodiment, the outer panel 2 includes a pad hole 23. The connecting plate 5 also includes a second connecting hole 54. The second connecting hole 54 communicates with the pad hole 23 and is used to connect a spare tire support pad disposed on the side of the outer panel 2 away from the assembly space 3. The spare tire support pad can contact the spare tire, thereby providing support for the spare tire in multiple places and preventing the spare tire from being suspended and generating a bending moment on the spare tire bracket, which could damage the tailgate assembly 100. The second connecting hole 54 can be directly disposed at any position of the first connecting portion 55, or disposed in the assembly structure 551 described in any of the above embodiments.

[0049] Furthermore, the connecting plate 5 may also include weight-reducing holes 57. Weight-reducing holes 57 are provided in at least one of the first connecting portion 55 and the second connecting portion 56. By providing weight-reducing holes 57, the overall weight of the connecting plate 5 can be reduced. Simultaneously, since the connecting plate 5 serves to provide a connection point for the spare tire bracket, its other positions besides the first connecting hole 51 and the second connecting hole 54 can be considered as serving to connect with the inner reinforcing plate 4. The reduced functionality at these positions allows for the provision of weight-reducing holes 57, thereby preventing stress concentration in the connecting plate 5 and improving its structural strength.

[0050] In embodiments where the distance between the upper part 11 and the outer plate 2 is smaller than the distance between the lower part 12 and the outer plate 2, since the inner reinforcing plate 4 is provided with an annular space 43, and the connecting plate 5 is only distributed above Tp and below Bt of the annular space 43, there is a larger gap in the thickness direction between the lower part 12 and the outer plate 2. Figure 1 , Figure 2 , Figure 7 and Figure 8In an optional embodiment, the tailgate assembly 100 further includes an outer reinforcing plate 6. The outer reinforcing plate 6 is disposed in the assembly space 3, between the inner reinforcing plate 4 and the outer plate 2, and connects the outer plate 2 and the lower part 12 via an annular space 43. By providing the outer reinforcing plate 6, the structural strength of the tailgate assembly 100 at the lower part 12 of the inner plate 1 can be effectively guaranteed, while also ensuring that the assembly space 3 has sufficient space to accommodate components such as lock actuators and hinges.

[0051] In an optional embodiment, the outer reinforcing plate 6 extends along the width direction and crosses the annular space 43, connecting with the inner plate 1 or the outer plate 2 on the left side (Lf) and right side (Rt), with its middle portion abutting against the outer plate 2. In an optional embodiment, the inner plate 1 includes a first reinforcing beam 13 and a second reinforcing beam 14 disposed in the ventilation space 121. The first reinforcing beam 13 and the second reinforcing beam 14 are distributed along the width direction. To further improve the structural reinforcement effect of the outer reinforcing plate 6, the outer reinforcing plate 6 includes a first side reinforcing portion 61, a middle reinforcing portion 62, and a second side reinforcing portion 63 connected along the width direction. The end of the first side reinforcing portion 61 away from the middle reinforcing portion 62 is connected to the outer plate 2. The end of the second side reinforcing portion 63 away from the middle reinforcing portion 62 is connected to the inner plate 1. The two ends of the middle reinforcing portion 62 are connected to the first reinforcing beam 13 and the second reinforcing beam 14 respectively, and the middle region abuts against the outer plate 2.

[0052] like Figure 7 As shown, in the direction from left Lf to right Rt, the left Lf of the first side reinforcement 61 is connected to the outer plate 2; the left Lf of the middle reinforcement 62 is connected to the first reinforcing beam 13; the right Rt of the middle reinforcement 62 is connected to the second reinforcing beam 14; and the right Rt of the second side reinforcement 63 is connected to the inner plate 1. In this way, the outer reinforcement plate 6 can have two additional connection points with the inner plate 1 in the middle region, thereby increasing the connection strength between the outer reinforcement plate 6 and the inner plate 1, and further improving the ability of the outer reinforcement plate 6 to withstand forces from rear Bc to front Fr.

[0053] In an optional embodiment, the intermediate reinforcing portion 62 includes two first intermediate supports 621 extending along the thickness direction. The two first intermediate supports 621 are located on opposite sides of the intermediate reinforcing portion 62 in the width direction, i.e., the intermediate reinforcing portion 62 has first intermediate supports 621 on both the left (Lf) and right (Rt) sides. The end of the first intermediate support 621 away from the intermediate reinforcing portion 62 is used to connect with the inner plate 1. The middle region of the intermediate reinforcing portion 62 abuts against the outer plate 2. Based on the middle region of the intermediate reinforcing portion 62, the first intermediate supports 621 extend towards the inner plate 1 in a direction from rear (Bc) to front (Fr). Thus, the first intermediate supports 621 give the outer reinforcing plate 6 a certain dimension in the thickness direction, thereby increasing the distance between the middle region of the intermediate reinforcing portion 62 and the inner plate 1 in the thickness direction, forming a buffer space. When the outer plate 2 is subjected to a force from rear (Bc) to front (Fr), the intermediate reinforcing portion 62 supports the outer plate 2 under the action of the first intermediate supports 621, preventing deformation of the outer plate 2. When the external force is too great, the outer plate 2 is recessed towards the middle reinforcing part 62, causing the middle reinforcing part 62 to deform forward Fr. Due to the existence of the buffer space, the deformation of the middle reinforcing part 62 will not cause the inner plate 1 to deform to a certain extent, thereby achieving the protection of the inner plate 1.

[0054] Furthermore, in the embodiment where the inner panel 1 includes a first reinforcing beam 13 and a second reinforcing beam 14, the two first intermediate supports 621 of the intermediate reinforcing part 62 can be connected to the first reinforcing beam 13 and the second reinforcing beam 14 respectively, so that the intermediate reinforcing part 62 can improve the structural strength at the ventilation space 121 and can be positioned as centrally as possible in the ventilation space 121 in the height direction, thus ensuring the structural strength of the outer panel 2 and the inner panel 1.

[0055] Optionally, the intermediate reinforcement 62 further includes a second intermediate support leg 622 extending along the thickness direction. One end of the second intermediate support leg 622 is connected to one side of the intermediate reinforcement 62 in the height direction, and the other end is connected to the inner plate 1. Based on the middle region of the intermediate reinforcement 62, the second intermediate support leg 622 may extend from below (Bt) towards above (Tp), thereby connecting to the inner plate 1 near the first horizontal plate 421; or, the second intermediate support leg 622 may extend from above (Tp) towards below (Bt), thereby connecting to the inner plate 1 near the second horizontal plate 422. The second intermediate support leg 622 can serve as a further support unit, thereby improving the structural strength of the intermediate reinforcement 62, preventing deformation of the middle region under stress, and further ensuring the structural strength of the backplate assembly.

[0056] It should be noted that the central region of the intermediate reinforcing part 62 described herein should be understood as the position of the intermediate reinforcing part 62 excluding the first intermediate support leg 621. Therefore, the second intermediate support leg 622, as a support unit, can be centrally located in the intermediate reinforcing part 62, or it can be located on the left side Lf or right side Rt near the central region.

[0057] The number of second intermediate supports 622 may be only one, thereby forming a triangular support with the first intermediate supports 621 on both sides to ensure support strength. In other embodiments, the number of second intermediate supports 622 may include multiples, and they may be distributed on the same side or different sides of the intermediate reinforcement 62, thereby specifically improving the structural strength of the intermediate reinforcement 62.

[0058] In an optional embodiment, the first side reinforcement 61 is connected to the end of the first intermediate support 621 away from the intermediate reinforcement 62. Thus, the connection point between the first side reinforcement 61 and the intermediate reinforcement 62 is close to the connection point between the intermediate reinforcement 62 and the inner plate 1. Compared to the embodiment where the first side reinforcement 61 and the intermediate reinforcement 62 are connected in the middle region, this embodiment improves the connection strength between the intermediate reinforcement 62 and the first side reinforcement 61. When the connection point between the first side reinforcement 61 and the intermediate reinforcement 62 is subjected to force, the inner plate 1 can provide some support, thereby preventing deformation of the outer reinforcement plate 6 caused by deformation of the connection point between the first side reinforcement 61 and the intermediate reinforcement 62. Similarly, the second side reinforcement 63 can be connected to the end of the intermediate support away from the intermediate reinforcement 62.

[0059] Optionally, the first side reinforcement 61 includes a first side support 611 extending along the thickness direction. The first side support 611 is connected to the inner plate 1. The first side support 611 is disposed on the side of the first side reinforcement 61 near the intermediate reinforcement 62, and its end away from the first side reinforcement 61 is connected to the intermediate reinforcement 62. Figure 7 and Figure 8 As shown, in this embodiment, the first side support 611 is disposed on the right side Rt of the first side reinforcement 61. Alternatively, the first side support 611 is disposed on the side of the first side reinforcement 61 in the height direction, for example, at least one of the upper Tp or lower Bt. The placement of the first side support 611 increases the distance between the first side reinforcement 61 and the inner plate 1 in the thickness direction, thereby creating a buffer cavity between the first side reinforcement 61 and the inner plate 1, achieving effective buffering and support.

[0060] In an embodiment where the intermediate reinforcing portion 62 includes a first intermediate support leg 621 and a first side support leg 611 disposed on the side of the first side reinforcing portion 61 near the intermediate reinforcing portion 62, the first intermediate support leg 621 and the first side support leg 611 are connected and subsequently fixed to the inner plate 1. This arrangement allows for the formation of independent connection areas between the first side reinforcing portion 61 and the intermediate reinforcing portion 62, and enables them to be spaced apart in the width direction. Compared to embodiments where the outer reinforcing plate 6 is a single, nearly planar plate, this embodiment provides effective independent support and reinforcing areas at multiple locations in the width direction between the inner plate 1 and the outer plate 2.

[0061] In the embodiment where the first side support 611 is simultaneously disposed on the side of the first side reinforcement 61 near the middle reinforcement 62, and above Tp and below Bt of the first side reinforcement 61, the three first side support legs 611 can form a triangular support for the first side reinforcement 61, thereby improving the support strength of the first side support legs 611 when the first side reinforcement 61 is subjected to a force from Bc to Fr.

[0062] In some optional embodiments, the first side reinforcement 61 includes a connecting abutment area 612 and an assembly area 613. The abutment area 612 is connected to the outer plate 2. The assembly area 613 is located near the middle reinforcement 62 and is spaced apart from the abutment area 612 in the thickness direction, so that the assembly area 613 can form a gap with the outer plate 2. The assembly area 613 is used to assemble the lock actuator, and the gap between the assembly area 613 and the outer plate 2 is the installation space for accommodating the lock actuator. With this arrangement, the outer reinforcement plate 6 not only strengthens the structural strength of the tailgate assembly 100, but also serves as a mounting point for components to be connected in the assembly space 3. Furthermore, since personnel need to manually operate the lock actuator when opening the tailgate assembly 100 from outside the vehicle, the connection between the abutment area 612 and the outer plate 2 minimizes the distance between the assembly area 613 and the outer plate 2 in the thickness direction, so that the handle for operating the lock actuator protrudes from the outer plate 2 and allows personnel to operate the lock actuator from the side of the outer plate 2 away from the assembly space 3.

[0063] In the embodiment shown in the attached drawings, the first vertical plate 411 on the left side Lf is a lock reinforcement plate, so the first side reinforcement 61 is also located on the left side Lf of the outer reinforcement plate 6, so that the lock actuator assembled in the assembly area 613 is positioned close to the lock reinforcement plate. In the embodiment where the second vertical plate 412 is a lock reinforcement plate, the first side reinforcement 61 is correspondingly positioned on the right side Rt of the outer reinforcement plate 6.

[0064] Similar to the first side support 611, optionally, the second side reinforcement 63 includes a second side support 631 extending in the thickness direction. The second side support 631 is connected to the inner plate 1. The second side support 631 is disposed on the side portion of the second side reinforcement 63 in the width direction. Figure 7 and Figure 8 As shown, the second side support 631 is disposed on the left side Lf and right side Rt of the second reinforcing part. However, it should be understood that the second side support 631 may be disposed only on the left side Lf of the second reinforcing part or only on the right side Rt of the second reinforcing part. The placement of the second side support 631 increases the distance in the thickness direction between the area of ​​the second side reinforcing part 63 near the middle reinforcing part 62 and the inner plate 1, thereby creating a buffer cavity between the second side reinforcing part 63 and the inner plate 1, achieving effective buffering and support. Furthermore, being away from the inner plate 1, this position allows it to fit against the outer plate 2, ensuring the support effect on the outer plate 2.

[0065] In the embodiment shown in the accompanying drawings, the number of second side supports 631 includes three, with two second side supports 631 distributed on the right side Rt of the second side reinforcement 63 and the other distributed on the left side Lf. Thus, the three second side supports 631 can support the second side reinforcement 63 in a three-point distribution, thereby improving the strength of the outer plate 2 corresponding to the position of the second side reinforcement 63.

[0066] In an optional embodiment, the second side reinforcement 63 gradually increases in height in the direction from the intermediate reinforcement 62 to the second side reinforcement 63. Figure 8 In the illustrated embodiment, the second side reinforcement 63 is located to the right (Rt) of the middle reinforcement 62. Therefore, in the direction from the left (Lf) to the right (Rt), the dimension of the second side reinforcement 63 gradually increases in the height direction, forming a triangular-like plate surface. This embodiment maximizes the contact area between the second side reinforcement 63 and the outer plate 2, thereby enhancing the structural reinforcement effect of the second side reinforcement 63.

[0067] In the embodiment where the first vertical plate 411 is a lock reinforcement plate, the left side Lf of the tailgate assembly 100 is provided with an unlocking structure such as a handle for the unlocking lock actuator. When the vehicle is stuck in mud or requires personnel to get out and push the vehicle from the rear, the personnel will apply a pushing force to the tailgate assembly 100 from the right side Rt of the vehicle to better support the vehicle with their hands. The second side reinforcement 63 is located on the right side Rt, thus increasing the reinforcing area of ​​the triangular second reinforcement. This ensures that when personnel apply a pushing force to the outer plate 2, the assembly space 3 is supported by the second side reinforcement 63, thereby preventing deformation of the outer plate 2 under stress.

[0068] It should be understood that in embodiments where the second vertical plate 412 is a locking reinforcement plate, the second side reinforcement 63 can be located to the left (Lf) of the middle reinforcement 62. This application is not limiting in this respect.

[0069] In the embodiment shown in the attached drawings, since the dimension of the right side Rt of the second side reinforcement 63 is larger than the dimension of the left side Lf, two second side supports 631 are provided on the right side Rt, and they are spaced apart along the height direction. Thus, the distribution of the second side supports 631 conforms to the shape of the second side reinforcement 63, ensuring that when people of different heights apply force to the outer plate 2, the second side reinforcement 63 can provide good reinforcement and protection, preventing the second side reinforcement 63 from deforming towards the inner plate 1 under force.

[0070] In some optional embodiments, the second side reinforcement 63 further includes a third side support 632 extending in the width direction. One end of the third side support 632 is connected to the side of the second side reinforcement 63 away from the intermediate reinforcement 62, and the other end is used to connect to the inner panel 1. The third side support 632 is used to abut against the outer panel 2. The inner panel 1 and the outer panel 2 are connected at the edge position and form an assembly space 3 by protruding away from each other. In this embodiment, the third side support 632 abuts against the outer panel 2 and extends in the width direction to connect with the inner panel 1. It should be understood that the end of the third side support 632 is connected to the edge position of the inner panel 1. In this way, the second side reinforcement 63 can provide reinforced support for the outer panel 2 near the edge of the tailgate assembly 100, so that when the cart is in use, people can place their hands in multiple areas of the tailgate assembly 100 without worrying about deformation or damage to the tailgate assembly 100.

[0071] In embodiments where the second side reinforcement 63 includes two second side support legs 631 on the side away from the middle reinforcement 62, a third side support leg 632 can be located between the two second side support legs 631, such that the second side support legs 631 can provide abutment and support for the second side reinforcement plate at both ends, and the third side support leg 632 can abut against the outer plate 2 in the middle. With this arrangement, when a person applies force outward from outside the vehicle, their hand can abut against various areas of the second side reinforcement plate. This connection method reduces the possibility of bending moment occurring at the end of the second side reinforcement 63 where the second side support leg 631 connects to the inner plate 1 due to the force applied by a person, thereby ensuring the connection stability of the second side reinforcement 63.

[0072] To improve the connection between the outer reinforcing plate 6 and the outer plate 2, in an optional embodiment, the outer reinforcing plate 6 includes an adhesive groove 64. The adhesive groove 64 is disposed on the side of the outer reinforcing plate 6 facing the outer plate 2. The back door assembly 100 also includes an adhesive layer (not shown). The adhesive layer is located in the adhesive groove 64 and connects the outer reinforcing plate 6 and the outer plate 2. When assembling the back door assembly 100, the outer reinforcing plate 6 is screwed or welded to the inner plate 1. Then, before the outer plate 2 covers the inner plate 1 to close the assembly space 3, the adhesive layer is disposed in the adhesive groove 64, and then the outer plate 2 is covered. At this time, the adhesive layer can bond the outer plate 2 and the outer reinforcing plate 6, thereby improving the connection stability of the outer reinforcing plate 6 and the outer plate 2 and preventing the outer plate 2 from being deformed due to stress caused by the gap between them.

[0073] As shown in the attached figures, glue channels 64 can be provided in multiple locations. In the first side reinforcement 61, since the abutment area 612 is connected to the outer panel 2 and the assembly area 613 has a gap with the outer panel 2, glue channels 64 are only provided in the abutment area 612. In the intermediate reinforcement 62, the intermediate area abuts against the outer panel 2, so multiple glue channels 64 are provided in the intermediate area. In the second side reinforcement 63, the second side reinforcement 63 is mainly used for abutting against the outer panel 2, so glue channels 64 are distributed in all areas of the second side reinforcement 63 except for the second side support 631. However, this should be taken as an example and not as a limitation. The outer reinforcement plate 6 may have glue channels 64 provided in at least one of the first side reinforcement 61, the intermediate reinforcement 62, and the second side reinforcement 63.

[0074] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A rear door assembly, characterized in that, Applied to vehicles; the tailgate assembly includes: Inner panel; An outer panel, connected to the inner panel, forms an assembly space for the rear door assembly between the inner panel and the outer panel; the outer panel includes a bracket hole communicating with the assembly space; An inner reinforcing plate is disposed in the assembly space and connected to the inner plate; the inner reinforcing plate includes vertical plates and horizontal plates; the vertical plates include a first vertical plate and a second vertical plate extending along the height direction; the horizontal plates include a first horizontal plate and a second horizontal plate spaced apart along the height direction; one end of the first horizontal plate and the second horizontal plate are respectively fixedly connected to the first vertical plate, and the other end are respectively fixedly connected to the second vertical plate to form an annular space of the inner reinforcing plate; and, A connecting plate is disposed in the assembly space and connected to the horizontal plate; the connecting plate includes a first connecting hole communicating with the bracket hole; the first connecting hole is used to connect a spare tire bracket disposed on the side of the outer plate away from the assembly space.

2. The rear door assembly according to claim 1, characterized in that, The inner panel includes an upper part and a lower part distributed along the height direction; the upper part is provided with a back window space; the first horizontal plate is connected to the lower part and is closer to the upper part relative to the second horizontal plate; wherein... The vertical plate extends from the lower part to the upper part and extends along a portion of the edge of the back window space.

3. The rear door assembly according to claim 1, characterized in that, The inner panel includes an upper part and a lower part distributed along the height direction; the lower part is provided with a ventilation space; the horizontal plate is connected to the lower part; the first horizontal plate is provided on the side of the ventilation space near the upper part, and the second horizontal plate is provided on the side of the ventilation space away from the upper part; the ventilation space is exposed from the annular space.

4. The rear door assembly according to claim 3, characterized in that, The connecting plate includes two parts, referred to as the upper connecting beam and the lower connecting beam; the upper connecting beam is connected to the first horizontal plate; and the lower connecting beam is connected to the second horizontal plate.

5. The rear door assembly according to claim 4, characterized in that, The upper connecting beam includes a first connecting area, an upper support area, and a second connecting area distributed sequentially along the height direction; the first connecting area and the second connecting area are connected to the first horizontal plate; there is a gap between the upper support area and the first horizontal plate; the first connecting hole is provided in the upper support area; And / or, The lower connecting beam includes a third connecting region, a lower support region, and a fourth connecting region distributed sequentially along the height direction; the third connecting region and the fourth connecting region are connected to the second horizontal plate; there is a gap between the lower support region and the second horizontal plate; the first connecting hole is provided in the lower support region.

6. The rear door assembly according to claim 1, characterized in that, The inner panel includes an upper portion and a lower portion distributed along the height direction; the distance between the upper portion and the outer panel is smaller than the distance between the lower portion and the outer panel; the rear door assembly further includes: An outer reinforcing plate is disposed in the assembly space; the outer reinforcing plate is disposed between the inner reinforcing plate and the outer plate, and is connected to the outer plate and the lower part via the annular space.

7. The rear door assembly according to claim 6, characterized in that, The lower part is provided with a ventilation space; the inner plate includes a first reinforcing beam and a second reinforcing beam disposed in the ventilation space; the first reinforcing beam and the second reinforcing beam are distributed along the width direction; the width direction is perpendicular to the height direction; The outer reinforcing plate includes a first side reinforcing portion, a middle reinforcing portion, and a second side reinforcing portion connected along the width direction; the end of the first side reinforcing portion away from the middle reinforcing portion is connected to the outer plate; the end of the second side reinforcing portion away from the middle reinforcing portion is connected to the inner plate. The two ends of the intermediate reinforcing section are respectively connected to the first reinforcing beam and the second reinforcing beam, and the middle area abuts against the outer plate.

8. The rear door assembly according to claim 7, characterized in that, A gap exists between the region of the first side reinforcement near the middle reinforcement and the outer panel to form an installation space between the first side reinforcement and the outer panel for accommodating the lock actuator in the back door assembly; and / or, There is a gap between the area of ​​the second side reinforcement near the middle reinforcement and the inner plate, so that a portion of the second side reinforcement fits into the outer plate; and / or, The intermediate reinforcement also includes a support unit disposed in the intermediate region; the support unit extends away from the intermediate region along the height direction and its end is connected to the inner plate.

9. The rear door assembly according to claim 6, characterized in that, The outer reinforcing plate includes an adhesive groove; the adhesive groove is disposed on the side of the outer reinforcing plate facing the outer panel; the back door assembly also includes an adhesive layer; the adhesive layer is located in the adhesive groove and connects the outer reinforcing plate and the outer panel.

10. The rear door assembly according to claim 1, characterized in that, The outer plate includes a pad hole; the connecting plate further includes a second connecting hole; the second connecting hole communicates with the pad hole; the second connecting hole is used to connect a spare tire support pad disposed on the side of the outer plate away from the assembly space.

11. A vehicle, characterized in that, Includes the rear door assembly as described in any one of claims 1-10.

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