Rear door reinforcing structure and vehicle

Abstract

The rear door reinforcing structure comprises a rear door body, a first reinforcing pipe and a second reinforcing pipe, the rear door body is connected to the side portion of a vehicle body in a sliding mode, the first reinforcing pipe is arranged on the inner front side of the rear door body in the vertical direction, and the second reinforcing pipe is arranged in the first reinforcing pipe in a penetrating mode. The second reinforcing pipe is connected with the inner wall of one side of the first reinforcing pipe. According to the rear door reinforcing structure, the first reinforcing pipe and the second reinforcing pipe form a double-layer pipe structure in the rear door body, a supporting effect is achieved on the front side in the rear door body, the structural strength of the rear door body is improved, and the supporting performance of the front area of the rear door body is met; the problem that the strength of the side structure of the vehicle body is attenuated due to the fact that the vehicle is not provided with a B-column structure is solved, the side impact resistance of the rear door body is improved, and the riding safety of a driver and passengers is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rear door structures, and more specifically, relates to a rear door strengthening structure and a vehicle. Background Art

[0002] The B-pillar of a vehicle, as an important load-bearing component, plays a crucial role in the safety of the vehicle. The B-pillar is a vertical column connecting the front and rear doors of the vehicle, mainly playing a role in bridging the impact force from the side. Currently, in order to meet the usage needs of passengers, there are many vehicles without a B-pillar. This type of vehicle can provide good convenience when passengers get on and off the vehicle. At the same time, it is also convenient to expand the cockpit function, making the field of vision of the occupants wider and giving passengers a certain degree of convenience and freshness when riding.

[0003] However, the body of the above-mentioned vehicle without a B-pillar has poor safety performance when dealing with side collisions, and there is a risk of the rear door intruding into the vehicle during a side collision, which affects the safety of the driver and passengers. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rear door strengthening structure and a vehicle, which can effectively improve the overall strength of the rear door structure of a vehicle without a B-pillar and can effectively reduce the intrusion amount of the rear door during a side collision.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: providing a rear door strengthening structure, including a rear door body, a first strengthening pipe, and a second strengthening pipe. The rear door body is slidably connected to the side part of the vehicle body. The first strengthening pipe is arranged in the front side inside the rear door body in the up and down direction. The second strengthening pipe is arranged inside the first strengthening pipe, and one side inner wall of the second strengthening pipe is connected to the first strengthening pipe.

[0006] In some possible implementation manners, the first strengthening pipe includes an outer strengthening plate and an inner strengthening plate. The outer strengthening plate and the inner strengthening plate are respectively connected to the inner side wall of the rear door body. The inner strengthening plate is connected to the side of the outer strengthening plate close to the vehicle body central axis. The outer strengthening plate and the inner strengthening plate enclose a cavity that penetrates up and down to accommodate the second strengthening pipe, and the second strengthening pipe is connected to the inner wall of the outer strengthening plate.

[0007] In some embodiments, the outer strengthening plate has an outer convex strip protruding towards the outside of the side body. The outer convex strip extends in the up and down direction, and the second strengthening pipe is connected to the front side inner wall of the outer convex strip.

[0008] In some possible implementation manners, the outer strengthening plate extends forward to protrude beyond the inner strengthening plate. The front side edge of the outer strengthening plate is flush with the front side edge of the rear door inner panel of the rear door body. The inner strengthening plate extends obliquely towards the central axis side of the vehicle body from the back to the front. The front side edge of the inner strengthening plate is located between the outer strengthening plate and the rear door inner panel of the rear door body.

[0009] In some embodiments, an avoidance cavity that bulges outward and is located on the front side of the outer convex strip is provided on the outer reinforcement plate, and the inner reinforcement plate is connected to the inner cavity wall of the avoidance cavity.

[0010] In some possible implementation manners, the rear door reinforcement structure further includes an outer plate front vertical plate connected to the front side of the first reinforcement tube. One side edge of the outer plate front vertical plate is connected to the front side edge of the outer reinforcement plate, and the other side edge of the outer plate front vertical plate is connected to the front side edge of the rear outer plate of the rear door body.

[0011] In some possible implementation manners, the inner reinforcement plate and the second reinforcement tube respectively protrude upward from the outer reinforcement plate. The upper ends of the inner reinforcement plate and the second reinforcement tube are flush, and the inner reinforcement plate and the second reinforcement tube are both located on the front side of the rear window.

[0012] In some possible implementation manners, an upper extension portion extending backward is provided at the upper end of the first reinforcement tube. The upper extension portion surrounds the upper front side of the rear window. A lower extension portion protruding toward the rear side of the vehicle body is provided at the lower end of the first reinforcement tube, and the lower extension portion gradually extends obliquely backward and downward.

[0013] In some embodiments, in the front-rear direction of the vehicle body, the length of the upper part of the second reinforcement tube is greater than the length of the lower part of the second reinforcement tube; in the left-right direction of the vehicle body, the width of the upper part of the second reinforcement tube is less than the width of the lower part of the second reinforcement tube.

[0014] Compared with the prior art, the solution shown in the embodiments of the present application provides a rear door reinforcement structure. The first reinforcement tube and the second reinforcement tube form a double-layer tube structure inside the rear door body, forming a supporting effect on the inner front side of the rear door body, improving the structural strength of the rear door body, meeting the supporting performance of the front part area of the rear door body, making up for the attenuation of the structural strength of the vehicle body side caused by the absence of the B-pillar structure of the vehicle, improving the performance of the rear door body against side impacts, and enhancing the safety of the passengers and drivers when riding in the vehicle.

[0015] The present utility model further provides a vehicle, and the vehicle includes a rear door reinforcement structure. The above vehicle utilizes the double-layer tube structure formed by the first reinforcement tube and the second reinforcement tube, effectively improving the performance of the rear door body against side impacts and enhancing the safety of the passengers and drivers when riding in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1Schematic top cross-sectional structure view of the rear door reinforcement structure provided by the embodiment of the present utility model;

[0018] Figure 2 For the embodiment of the present utility model Figure 1 Partial enlarged structure view of I in the figure;

[0019] Figure 3 For the embodiment of the present utility model Figure 1 Partial enlarged structure view of II in the figure;

[0020] Figure 4 For the embodiment of the present utility model Figure 1 Structure view of the rear door reinforcement structure after omitting the rear door body in the embodiment of the present utility model;

[0021] Figure 5 For the embodiment of the present utility model Figure 4 Structure view from another angle;

[0022] Figure 6 For the embodiment of the present utility model Figure 4 Exploded structure view of the rear door reinforcement structure after omitting the rear door body in the embodiment of the present utility model;

[0023] Figure 7 For the embodiment of the present utility model Figure 6 Structure view of the front vertical plate of the outer panel from another angle in the embodiment of the present utility model;

[0024] Figure 8 For the embodiment of the present utility model Figure 6 Structure view of the middle and outer reinforcement plate in the embodiment of the present utility model.

[0025] Among them, each reference numeral in the figure:

[0026] 1, rear door body; 11, outer rear door panel; 12, inner rear door panel; 2, first reinforcement pipe; 21, outer reinforcement plate; 22, inner reinforcement plate; 23, outer convex strip; 24, avoidance cavity; 25, upper extension part; 26, lower extension part; 3, second reinforcement pipe; 4, front vertical plate of the outer panel; 41, first flanging; 42, second flanging; 51, inner installation stop; 52, outer installation stop. Specific embodiments

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] In the claims, the description and the above-mentioned drawings of the present utility model, the terms "front" and "rear" are in the same direction as the front and rear directions of the vehicle body, "left" and "right" are in the same direction as the left and right directions of the vehicle body, and "up" and "down" are in the same direction as the up and down directions of the vehicle body; the term "inner" refers to the direction towards the central axis of the vehicle body, and the term "outer" refers to the direction away from the central axis of the vehicle body. Among them, the central axis of the vehicle body is parallel to the front and rear directions of the vehicle body. For the remaining orientation terms, unless otherwise clearly defined, the use of terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or positional relationship is based on the orientation and positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the specific protection scope of the present utility model.

[0029] Please refer to Figures 1 to 8 , and now the rear door reinforcement structure and the vehicle provided by the present utility model will be described. The rear door reinforcement structure includes a rear door body 1, a first reinforcement pipe 2, and a second reinforcement pipe 3. The rear door body 1 is slidably connected to the side of the vehicle body. The first reinforcement pipe 2 is arranged along the up and down direction at the inner front side of the rear door body 1. The second reinforcement pipe 3 is inserted into the first reinforcement pipe 2, and one side inner wall of the second reinforcement pipe 3 is connected to the first reinforcement pipe 2.

[0030] Compared with the prior art, for the rear door reinforcement structure provided in this embodiment, the first reinforcement pipe 2 and the second reinforcement pipe 3 form a double-layer pipe structure inside the rear door body 1, which plays a supporting role at the inner front side of the rear door body 1, improves the structural strength of the rear door body 1, meets the support performance of the front part area of the rear door body 1, makes up for the attenuation problem of the structural strength of the vehicle body side caused by the absence of the B-pillar structure, improves the performance of the rear door body 1 against side impacts, and improves the safety of the passengers and drivers during riding.

[0031] It should be noted that there is a side door opening on the side of the vehicle body of the vehicle without a B-pillar, and the side opening is closed by the vehicle front door and the vehicle rear door. The front door body is hinged at the front edge position of the side door opening, and the rear door body 1 is slidably connected to the rear area of the side door opening. The middle part of the side door opening refers to the middle part of the side door opening in the front and rear directions, that is, the position corresponding to the installation position of the B-pillar in the original structure, and this position is also called the middle part of the vehicle body side.

[0032] The above vehicle adopts a structure without a B-pillar, which provides good convenience for passengers to get on and off the vehicle. At the same time, it can effectively expand the cockpit functions, broaden the vision of the occupants, and bring good convenience and freshness to customers. Since there is no B-pillar on the side of the vehicle, the rear door of the vehicle adopts a structure that is slidably connected to the body, and is opened by sliding backward. When it is necessary to close the rear door of the vehicle, it is closed by sliding forward. At this time, the first reinforcing pipe 2 and the second reinforcing pipe 3 move forward with the rear door body 1 to a position adjacent to the front door of the vehicle. By the combined action of the first reinforcing pipe 2 and the second reinforcing pipe 3, an upper supporting effect is formed in the middle of the side of the body, achieving an effect similar to that of a B-pillar, and effectively improving the vehicle's ability to resist side impacts.

[0033] The second reinforcing pipe 3 is made by hot gas expansion forming. According to the principle of metal plastic deformation, in hot gas expansion forming, after the tube blank is heated, under the action of high air pressure, the tube blank generates flow deformation in the mold to form a high-strength pipe fitting. The pipes obtained by the above method have high reliability in use. Compared with the traditional methods of casting, forging, and welding, there is no weld seam generated, and the hot gas expansion forming method also improves the production efficiency of the pipes.

[0034] In some possible implementation manners, the above-mentioned first reinforcing pipe 2 has a structure as shown in Figure 1 , Figures 6 to 8 . Referring to Figure 1 , Figures 6 to 8 , the first reinforcing pipe 2 includes an outer reinforcing plate 21 and an inner reinforcing plate 22. The outer reinforcing plate 21 and the inner reinforcing plate 22 are respectively connected to the inner side wall of the rear door body 1. The inner reinforcing plate 22 is connected to the side of the outer reinforcing plate 21 close to the vehicle body central axis. The outer reinforcing plate 21 and the inner reinforcing plate 22 enclose a cavity that penetrates up and down to accommodate the second reinforcing pipe 3, and the second reinforcing pipe 3 is connected to the inner wall of the outer reinforcing plate 21.

[0035] In this embodiment, the first reinforcing pipe 2 adopts a form in which the outer reinforcing plate 21 and the inner reinforcing plate 22 are spliced together. They can be connected by connecting parts such as bolts, screws, and rivets, or can also adopt a welded connection form. The outer reinforcing plate 21 and the inner reinforcing plate 22 can enclose a cavity that penetrates up and down, and then the second reinforcing pipe 3 can be arranged and installed in terms of position. After the second reinforcing pipe 3 is installed on the first reinforcing pipe 2, it can be connected to the inner reinforcing plate 22 or the outer reinforcing plate 21, or can be connected to the inner reinforcing plate 22 and the outer reinforcing plate 21 respectively, all of which can ensure the reliability of the structural connection.

[0036] In some embodiments, the above-mentioned outer reinforcing plate 21 can have a structure as shown in Figure 1 , Figure 4 , Figure 6 and Figure 8 . Referring to Figure 1 , Figure 4 , Figure 6 andFigure 8 , the outer reinforcing plate 21 has an outward convex strip 23 protruding toward the outside of the side body. The outward convex strip 23 extends in the up and down direction, and the second reinforcing tube 3 is connected to the front inner wall of the outward convex strip 23.

[0037] In this embodiment, the outer reinforcing plate 21 is provided with an outward convex strip 23 protruding toward the outside of the vehicle body. The arrangement of the outward convex strip 23 facilitates increasing the internal space of the first reinforcing tube 2, and further facilitates the installation and layout of the second reinforcing tube 3. The outward convex strip 23 has a front inner wall near the front of the vehicle head, a rear inner wall near the rear of the vehicle tail, and an inner cavity side wall away from the central axis of the vehicle body. The second reinforcing tube 3 is connected to the front inner wall of the outward convex strip 23, so that the second reinforcing tube 3 is arranged as close as possible to the front part of the first reinforcing tube 2, forming a supporting effect on the middle part of the side of the vehicle body, and effectively strengthening the area where the B-pillar of the vehicle body should be arranged.

[0038] In some possible implementation manners, the above-mentioned outer reinforcing plate 21 adopts the structure as shown in Figures 1 to 3 . Refer to Figures 1 to 3 , the outer reinforcing plate 21 extends forward to protrude beyond the inner reinforcing plate 22. The front edge of the outer reinforcing plate 21 is flush with the front edge of the rear door inner panel 12 of the rear door body 1. The inner reinforcing plate 22 extends obliquely forward toward the central axis side of the vehicle body, and the front edge of the inner reinforcing plate 22 is located between the outer reinforcing plate 21 and the rear door inner panel 12 of the rear door body 1.

[0039] In the prior art, the rear door body 1 includes a rear door outer panel 11 and a rear door inner panel 12. The rear door inner panel 12 is located on the side close to the central axis of the vehicle body of the rear door outer panel 11. The middle part of the rear door outer panel 11 protrudes toward the outside of the vehicle body, and the middle part of the rear door inner panel 12 protrudes toward the inside of the vehicle body. The outer peripheral edge of the rear door outer panel 11 is connected to the outer peripheral edge of the rear door inner panel 12. After the rear door outer panel 11 and the rear door inner panel 12 are connected to each other, a hollow cavity structure can be formed. The first reinforcing tube 2 and the second reinforcing tube 3 are arranged in the above-mentioned cavity structure, playing an effective strengthening role for the rear door body 1.

[0040] Specifically, during the process of the inner reinforcing plate 22 extending from the rear to the front, it also extends obliquely toward the central axis side of the vehicle body, which can not only resist the impact force in the front and rear directions of the vehicle body, but also resist the impact force received by the side part of the vehicle body, improving the vehicle's ability to resist side collisions.

[0041] In some embodiments, the above-mentioned outer reinforcing plate 21 can adopt the structure as shown in Figures 1 to 2 . Refer to Figures 1 to 2 , the outer reinforcing plate 21 is provided with an avoidance cavity 24 protruding outward and located in front of the outward convex strip 23, and the inner reinforcing plate 22 is connected to the inner cavity wall of the avoidance cavity 24.

[0042] In this embodiment, the avoidance cavity 24 provided on the outer reinforcing plate 21 protrudes outward from the vehicle body, forming a structural avoidance with the front edge of the inner reinforcing plate 22, so that the inner reinforcing plate 22 is reliably connected to the inner cavity wall of the avoidance cavity 24, effectively connecting the inner reinforcing plate 22 and the outer reinforcing plate 21.

[0043] In some possible implementation manners, referring to Figures 1 to 3 , the rear door reinforcement structure further includes an outer panel front vertical plate 4 connected to the front side of the first reinforcement tube 2. One side edge of the outer panel front vertical plate 4 is connected to the front side edge of the outer reinforcing plate 21, and the other side edge of the outer panel front vertical plate 4 is connected to the front side edge of the rear door outer panel 11.

[0044] In this embodiment, an outer panel front vertical plate 4 is further provided between the rear door outer panel 11 and the rear door inner panel 12. The outer panel front vertical plate 4 can cooperate with the rear door outer panel 11 and the rear door inner panel 12 to form a space for accommodating the first reinforcement tube 2. A first flanging 41 extending forward is connected to the side edge of the outer panel front vertical plate 4 close to the vehicle body central axis. The first flanging 41 is located on the side of the outer reinforcing plate 21 away from the vehicle body central axis. The outer reinforcing plate 21 is connected to the rear door inner panel 12. The rear door inner panel 12, the first flanging 41, and the front side edge of the rear door inner panel 12 are flush, forming a three-layer stacked inner mounting bead 51 for installing the inner sealing strip.

[0045] A second flanging 42 extending forward is connected to the side edge of the outer panel front vertical plate 4 away from the vehicle body central axis. The second flanging 42 is connected to the rear door outer panel 11 of the rear door body 1, and can form an outer mounting bead 52 for installing the outer sealing strip, so that the inner sealing strip and the outer sealing strip jointly ensure effective sealing between the front door body and the rear door body 1.

[0046] Specifically, the outer reinforcing plate 21 extends forward to be flush with the front side edge of the rear door inner panel 12. The outer reinforcing plate 21 protrudes forward from the inner reinforcing plate 22. The inner reinforcing plate 22 is located between the outer reinforcing plate 21 and the rear door inner panel 12. The rear door inner panel 12 and the inner reinforcing plate 22 are welded. The inner side edge (i.e., the side close to the vehicle body central axis) of the outer panel front vertical plate 4 is attached to the outer side wall of the outer reinforcing plate 21. The rear door inner panel 12, the inner reinforcing plate 22, and the outer panel front vertical plate 4 form a three-layer stacked structure, forming the above-mentioned mounting bead for installing the inner sealing strip, ensuring good sealing performance.

[0047] Based on the above structure, the setting of the avoidance cavity 24 not only realizes the reasonable layout of the structure, but also helps to enhance the structural strength at the position of the inner mounting bead 51, improve the firmness of the inner sealing strip installation structure, and ensure good sealing performance.

[0048] In some possible implementation manners, the above-mentioned inner reinforcing plate 22 and the second reinforcement tube 3 adopt the structure as Figures 5 to 6 shown. Referring to Figures 5 to 6, the inner reinforcement plate 22 and the second reinforcement pipe 3 protrude upward from the outer reinforcement plate 21 respectively, and the upper ends of the inner reinforcement plate 22 and the second reinforcement pipe 3 are flush. Both the inner reinforcement plate 22 and the second reinforcement pipe 3 are located on the front side of the rear window.

[0049] In this embodiment, the inner reinforcement plate 22 and the second reinforcement pipe 3 extend upward to be connected to the roof longitudinal beam. The outer reinforcement plate 21 is arranged lower than the inner reinforcement plate 22, and the upper end of the outer reinforcement plate 21 is flush with the lower edge of the rear window to avoid position interference with the rear side window.

[0050] In some possible implementation manners, the above-mentioned feature, the first reinforcement pipe 2, adopts a structure as Figures 1 to 8 shown. Refer to Figures 1 to 8 , an upper extension portion 25 extending backward is provided at the upper end of the first reinforcement pipe 2. The upper extension portion 25 surrounds the upper front side of the rear window. A lower extension portion 26 protruding toward the rear side of the vehicle body is provided at the lower end of the first reinforcement pipe 2, and the lower extension portion 26 gradually extends obliquely backward and downward.

[0051] In this embodiment, the upper extension portion 25 located at the upper end of the first reinforcement pipe 2 structurally strengthens the upper front side portion of the rear door body 1, and the lower extension portion 26 located at the lower end of the first reinforcement pipe 2 structurally strengthens the lower front side portion of the rear door body 1, improving the support performance of the first reinforcement pipe 2 for the rear door body 1, thereby enhancing the strength performance of the rear door body 1 and enhancing the ability of the vehicle rear door to resist side impacts.

[0052] In some embodiments, the above-mentioned feature, the second reinforcement pipe 3, can adopt a structure as Figure 6 shown. Refer to Figure 6 , in the front-rear direction of the vehicle body, the length of the upper part of the second reinforcement pipe 3 is greater than the length of the lower part of the second reinforcement pipe 3; in the left-right direction of the vehicle body, the width of the upper part of the second reinforcement pipe 3 is smaller than the width of the lower part of the second reinforcement pipe 3.

[0053] In this embodiment, the cross-sectional shapes of the upper and lower parts of the second reinforcement pipe 3 change according to requirements. The length of the upper part of the second reinforcement pipe 3 is greater than the width, and the cross-section is rectangular. The length and width of the lower part of the second reinforcement pipe 3 are close, forming an approximate square structure. While cooperating with the first reinforcement pipe 2 to form a double-layer pipe structure, it can also effectively adapt to the dimensional requirements of the position on the front side of the rear window, meet the layout requirements of the rear door body 1 with a smaller width in the left-right direction of the vehicle body at this position, and can form sufficient structural avoidance.

[0054] Based on the same inventive concept, an embodiment of the present application further provides a vehicle, which includes a rear door reinforcement structure. The first reinforcement tube 2 and the second reinforcement tube 3 of the above vehicle form a double-tube structure inside the rear door body 1, providing a supporting effect at the front side inside the rear door body 1, improving the structural strength of the rear door body 1, meeting the support performance of the front part area of the rear door body 1, compensating for the attenuation problem of the structural strength of the vehicle body side caused by the absence of a B-pillar structure, enhancing the performance of the rear door body 1 in resisting side impacts, and enhancing the safety of the passengers during riding.

[0055] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. The rear door reinforcement structure is characterized by: The invention comprises a rear door body (1), a first reinforcing tube (2) and a second reinforcing tube (3); the rear door body (1) is slidably connected to the side of the vehicle body; the first reinforcing tube (2) is arranged on the inner front side of the rear door body (1) along the up-down direction; the second reinforcing tube (3) is passed through the first reinforcing tube (2); and the second reinforcing tube (3) is connected to the inner wall of one side of the first reinforcing tube (2).

2. The rear door reinforcement structure according to claim 1, characterized in that: The first reinforcing tube (2) comprises an outer reinforcing plate (21) and an inner reinforcing plate (22), the outer reinforcing plate (21) and the inner reinforcing plate (22) being respectively connected to the inner side wall of the rear door body (1), the inner reinforcing plate (22) being connected to a side of the outer reinforcing plate (21) close to the center axis of the vehicle body, the outer reinforcing plate (21) and the inner reinforcing plate (22) enclose a cavity which is through-through from top to bottom to accommodate the second reinforcing tube (3), and the second reinforcing tube (3) is connected to the inner wall of the outer reinforcing plate (21).

3. The rear door reinforcement structure according to claim 2, characterized in that: The outer reinforcing plate (21) has an outer convex strip (23) protruding toward the outside of the side body, and the outer convex strip (23) extends in the up-down direction. The second reinforcing tube (3) is connected to the front inner wall of the outer convex strip (23).

4. The rear door reinforcement structure according to claim 3, characterized in that: The outer reinforcing plate (21) extends forward to protrude from the inner reinforcing plate (22), the front side edge of the outer reinforcing plate (21) is flush with the front side edge of the rear door inner plate (12) of the rear door body (1), the inner reinforcing plate (22) extends obliquely from rear to front toward the center axis side of the vehicle body, and the front side edge of the inner reinforcing plate (22) is located between the outer reinforcing plate (21) and the rear door inner plate (12) of the rear door body (1).

5. The rear door reinforcement structure according to claim 4, characterized in that: The outer reinforcing plate (21) is provided with an avoidance cavity (24) which protrudes outward and is located in front of the outer convex strip (23), and the inner reinforcing plate (22) is connected to the inner cavity wall of the avoidance cavity (24).

6. The rear door reinforcement structure according to claim 4, characterized in that: The rear door reinforcement structure also includes an outer panel front vertical plate (4) connected to the front side of the first reinforcement tube (2), one side edge of the outer panel front vertical plate (4) is connected to the front side edge of the outer reinforcement plate (21), and the other side edge of the outer panel front vertical plate (4) is connected to the front side edge of the rear door outer panel (11) of the rear door body (1).

7. The rear door reinforcement structure according to claim 2, characterized in that: The inner reinforcing plate (22) and the second reinforcing tube (3) are respectively arranged to protrude upward from the outer reinforcing plate (21); the upper ends of the inner reinforcing plate (22) and the second reinforcing tube (3) are flush; and the inner reinforcing plate (22) and the second reinforcing tube (3) are both located on the front side of the rear window.

8. The rear door reinforcement structure according to any one of claims 1 to 6, characterized in that: The upper end of the first reinforcing tube (2) is provided with an upper extension portion (25) extending rearward, the upper extension portion (25) being arranged above the front side of the rear window, and the lower end of the first reinforcing tube (2) is provided with a lower extension portion (26) protruding toward the rear side of the vehicle body, the lower extension portion (26) gradually extending obliquely rearward and downward.

9. The rear door reinforcement structure according to claim 8, characterized in that: In the front-rear direction of the vehicle body, the length of the upper portion of the second reinforcing tube (3) is greater than the length of the lower portion of the second reinforcing tube (3); in the left-right direction of the vehicle body, the width of the upper portion of the second reinforcing tube (3) is less than the width of the lower portion of the second reinforcing tube (3).

10. A vehicle, characterized in that: The vehicle comprises the rear door reinforcement structure according to any one of claims 1-9.

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