Back door assembly and vehicle

Abstract

The utility model provides a back door assembly and a vehicle, relates to the technical field of vehicles, and is used for improving the use experience of a user. The back door assembly comprises a top cover rear cross beam, a D column inner plate and a back door hinge. The roof rear cross member extends in a width direction of the vehicle. And the D-column inner plate is connected with the top cover rear cross beam. The back door hinge comprises a vehicle body side hinge and a back door side hinge, a mounting boss is arranged on the side, away from the D-column inner plate, of the vehicle body side hinge, a threaded hole is formed in the mounting boss, the vehicle body side hinge is connected with the D-column inner plate, and a hinge connecting hole is formed in the end, close to the back door side hinge, of the vehicle body side hinge. And the back door side hinge is rotatably connected with the vehicle body side hinge through the hinge connecting hole. Therefore, the weight of the car body side hinge can be reduced while the strength is guaranteed, and then the stability and reliability of use of the back door can be improved, and the use experience of a user can be improved.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly to a back door assembly and a vehicle. Background Art

[0002] Since the overall structure of the rear door of an SUV model is relatively heavy, users need to rely on auxiliary opening mechanisms such as double gas struts, single electric drive struts, and double electric drive struts to open the rear door. During the operation of these auxiliary opening mechanisms, a relatively large output load will be generated, which will directly act on areas such as the strut mounting points and hinge mounting points, and large concentrated stresses will be generated in these areas. When the structural strength of the hinge mounting point is relatively low due to the concentrated stress generated by the strut, permanent deformation will occur in the hinge mounting area, resulting in the rear door being unable to close properly or there being a visible surface difference between the rear door and the vehicle body after closing, thereby reducing the stability and reliability of the rear door during use, as well as the user experience. Summary of the Utility Model

[0003] To solve the above technical problems, this application provides a back door assembly and a vehicle to improve the user experience.

[0004] In a first aspect, an embodiment of this application provides a back door assembly. The back door assembly includes: a top cover rear cross member, a D-pillar inner panel, and a back door hinge. The top cover rear cross member extends along the width direction of the vehicle. The D-pillar inner panel is connected to the top cover rear cross member. The back door hinge includes a vehicle body side hinge and a back door side hinge. On the side of the vehicle body side hinge away from the D-pillar inner panel, there is a mounting boss, and a threaded hole is formed on the mounting boss. The vehicle body side hinge is connected to the D-pillar inner panel. At one end of the vehicle body side hinge close to the back door side hinge, there is a hinge connection hole, and the back door side hinge is rotatably connected to the vehicle body side hinge through the hinge connection hole.

[0005] According to the back door assembly of the embodiment of this application, by providing a mounting boss on the vehicle body side hinge and forming a threaded hole on the mounting boss, the mounting boss can not only increase the meshing length of the bolt and the threaded hole, which is beneficial to improving the stability of the bolt connection, but also is beneficial to reducing the thickness of the vehicle body side hinge, so that the weight of the vehicle body side hinge can be reduced while ensuring the strength, and further the stability and reliability of the rear door during use, as well as the user experience can be improved.

[0006] In a possible implementation manner, on the side of the vehicle body side hinge away from the D-pillar inner panel, there is also a reinforcing rib. One end of the reinforcing rib is connected to the mounting boss, and the other end is connected to the hinge connection hole. In the length direction of the vehicle body side hinge, the height of the reinforcing rib first gradually increases and then gradually decreases.

[0007] In a possible implementation manner, the rear door hinge further includes a hinge mounting portion. The hinge on the back door side has a first end and a second end. The first end is connected to the hinge connection hole, and the second end is connected to the hinge mounting portion, and the width of the second end is the same as the width of the hinge mounting portion.

[0008] In a possible implementation manner, a weight reduction groove is provided on one side of the second end close to the inner panel of the D-pillar, and the opposite side walls of the weight reduction groove are connected to the hinge mounting portion.

[0009] In a possible implementation manner, the back door assembly further includes a hinge reinforcement plate. The hinge reinforcement plate includes a reinforcement body, a first flanging, a second flanging, a third flanging, and a fourth flanging. A bolt installation process hole is provided on the inner panel of the D-pillar, and a bolt fixing hole opposite to the bolt installation process hole is provided on the reinforcement body. The first flanging, the second flanging, the third flanging, and the fourth flanging are sequentially arranged around the circumference of the bolt installation process hole and are connected to the inner panel of the D-pillar.

[0010] In a possible implementation manner, the first flanging is connected to both the second flanging and the fourth flanging, and the third flanging is connected to both the second flanging and the fourth flanging.

[0011] In a possible implementation manner, the back door assembly further includes a connecting plate. The connecting plate is connected to the hinge reinforcement plate. The connecting plate is provided with a body side groove and a back door side groove. In the height direction of the back door assembly, the body side groove is recessed towards the hinge reinforcement plate, and the body side hinge is arranged at the body side groove. In the length direction of the back door assembly, the back door side groove is recessed towards the hinge reinforcement plate, and the back door side hinge is located in the body side groove.

[0012] In a possible implementation manner, a first welding point is provided on the bottom wall of the body side groove, and the body side groove is connected to the hinge reinforcement plate through the first welding point; a second welding point is provided on the side wall of the back door side groove, and the back door side groove is connected to the hinge reinforcement plate through the second welding point.

[0013] In a possible implementation manner, the back door assembly further includes an inner panel reinforcement plate, a wheelhouse connection reinforcement plate, and a body reinforcement plate. The inner panel reinforcement plate has a first connection end, a second connection end, a third connection end, and a fourth connection end. The first connection end is opposite to the second connection end, the third connection end is opposite to the fourth connection end. The first connection end is connected to the connecting plate, the second connection end is connected to the wheelhouse connection reinforcement plate, the third connection end is connected to the body reinforcement plate, and the fourth connection end is connected to the inner panel of the D-pillar.

[0014] In a second aspect, the present application provides a vehicle, including the above-mentioned back door assembly.

[0015] Among them, the technical effects brought by any design manner in the second aspect can refer to the technical effects brought by different design manners in the first aspect, which will not be elaborated here. Description of the Drawings

[0016] The drawings herein are incorporated into and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 An overall view of the back door assembly provided for some embodiments of the present application;

[0019] Figure 2 A partial view of the back door assembly provided for some embodiments of the present application;

[0020] Figure 3 A partial cross-sectional view of the back door assembly provided for some embodiments of the present application;

[0021] Figure 4 A schematic diagram of the overall structure of the rear door hinge provided for some embodiments of the present application;

[0022] Figure 5 A schematic diagram of the mechanism of the body side hinge provided for some embodiments of the present application;

[0023] Figure 6 A cross-sectional view of the body side hinge provided for some embodiments of the present application;

[0024] Figure 7 A schematic diagram of the back door side hinge provided for some embodiments of the present application;

[0025] Figure 8 A perspective view of the back door side hinge provided for some embodiments of the present application;

[0026] Figure 9 A schematic diagram of the overlapping structure of the hinge reinforcement plate and the inner D-pillar panel provided for some embodiments of the present application;

[0027] Figure 10 A schematic diagram of the inner D-pillar panel provided for some embodiments of the present application;

[0028] Figure 11 A schematic diagram of the hinge reinforcement plate provided for some embodiments of the present application;

[0029] Figure 12 A partial schematic diagram of the back door assembly provided for some other embodiments of the present application;

[0030] Figure 13 Partial cross-sectional view of the rear door assembly provided by other embodiments of the present application;

[0031] Figure 14 Schematic diagram of the inner panel reinforcement plate connection structure provided by some embodiments of the present application;

[0032] Figure 15 Exploded view of the rear door assembly provided by some embodiments of the present application.

[0033] Reference numerals:

[0034] 100, rear door assembly;

[0035] 1, rear cross member of the roof; 11, upper rear cross member of the roof; 12, lower rear cross member of the roof;

[0036] 2, inner panel of D-pillar; 21, bolt installation process hole;

[0037] 3, rear door hinge; 31, body side hinge; 311, mounting boss; 312; reinforcing rib; 3121, first reinforcing part; 3122, second reinforcing part; 313, hinge connection hole; 314, threaded hole; 32, rear door side hinge; 321, first end; 322, second end; 323, weight reduction groove; 33, hinge installation part;

[0038] 4, hinge reinforcement plate; 41, reinforcement body; 411, bolt fixing hole; 42, first flanging; 43, second flanging; 44, third flanging; 45, fourth flanging;

[0039] 5, connecting plate; 51, body side groove; 511, first welding point; 512, bolt connection hole; 52, rear door side groove; 521, second welding point;

[0040] 6, inner panel reinforcement plate; 61, first connection end; 62, second connection end; 63, third connection end; 64, fourth connection end;

[0041] 7, wheelhouse connection reinforcement plate;

[0042] 8, body reinforcement plate. Detailed implementation manners

[0043] In order to be able to more clearly understand the above objects, features and advantages of the present application, the solutions of the present application will be further described below. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It 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, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0045] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that they are connected to each other and the relative positional relationship after connection remains unchanged. In addition, the orientation terms mentioned in the embodiments of the present application, such as "inner", "outer", etc., are only with reference to the direction of the drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0046] In the description of the embodiments of the present application, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device including such element. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device including such element.

[0047] The present application provides a back door assembly and a vehicle.

[0048] The back door assembly of the embodiments of the present application will be described below.

[0049] Please refer to Figures 1-3 , Figure 1 , which is an overall view of the back door assembly provided by some embodiments of the present application, Figure 2 , which is a partial view of the back door assembly provided by some embodiments of the present application, Figure 3 , which is a partial cross-sectional view of the back door assembly provided by some embodiments of the present application. The back door assembly 100 provided by the embodiments of the present application includes a top cover rear cross member 1, a D-pillar inner panel 2, and a back door hinge 3.

[0050] The rear cross member 1 of the roof cover can extend along the width direction of the vehicle. The inner panel 2 of the D-pillar is connected to the rear cross member 1 of the roof cover.

[0051] Please refer to Figure 15 , wherein, the rear cross member 1 of the roof cover can include an upper rear cross member 11 and a lower rear cross member 12 of the roof cover, and the inner panel 2 of the D-pillar can be connected to the lower rear cross member 12 of the roof cover.

[0052] The rear door of the vehicle is connected to the vehicle body through the rear door hinge 3. Among them, the number of the rear door hinges 3 can be two, and the two rear door hinges 3 can be located on the opposite sides of the rear cross member 1 of the roof cover.

[0053] The rear door hinge 3 can include a body-side hinge 31 and a door-side hinge 32. Among them, the body-side hinge 31 is used to connect to the inner panel 2 of the D-pillar, and the door-side hinge 32 is used to connect to the rear door.

[0054] On the side of the body-side hinge 31 away from the inner panel 2 of the D-pillar, there can be provided an installation boss 311 and a reinforcing rib 312. A threaded hole 314 can be formed on the installation boss 311. The body-side hinge 31 is connected to the inner panel 2 of the D-pillar. Specifically, the installation boss 311 is located on the side of the body-side hinge 31 away from the inner panel 2 of the D-pillar, and the threaded hole 314 penetrates through the installation boss 311 and the body-side hinge 31, then the body-side hinge 31 can pass a bolt through the threaded hole 314. Among them, the number of the installation bosses 311 can be multiple. For example, the number of the installation bosses 311 can be two. The two installation bosses 311 can be arranged at intervals on the body-side hinge 31.

[0055] Thus, through the installation boss 311, the meshing length of the bolt and the threaded hole 314 can be increased, which is beneficial to improving the stability of the bolt connection during long-term use, and further can improve the stability and reliability of the rear door during use, as well as the user experience.

[0056] Exemplarily, the installation boss 311 and the body-side hinge 31 can be an integral part. Such a setting can directly use the body-side hinge 31 as the nut during the installation of the rear door hinge 3. Compared with the welded nut, it can have better strength and dimensional consistency, and can also complete the processes such as cold heading, thread rolling, and heat treatment during the production and manufacturing of the rear door hinge 3 at one time, avoiding the cumbersome process of subsequent bolt welding, thus simplifying the production process, being beneficial to improving production efficiency, and reducing the cost of the rear door assembly 100.

[0057] One end of the body-side hinge 31 close to the door-side hinge 32 is provided with a hinge connection hole 313. The door-side hinge 32 is rotatably connected to the body-side hinge 31 through the hinge connection hole 313. Among them, a pin shaft can pass through the hinge connection hole 313 to connect the door-side hinge 32 and the body-side hinge 31.

[0058] One end of the reinforcing rib 312 is connected to the mounting boss 311, and the other end is connected to the hinge connection hole 313. Such a setting is beneficial to improving the structural strength of the body side hinge 31 and reducing the thickness of the body side hinge 31.

[0059] For the rear door assembly 100 according to the embodiment of the present application, by providing the mounting boss 311 on the body side hinge 31 and forming the threaded hole 314 on the mounting boss 311, the mounting boss 311 can not only increase the meshing length of the bolt and the threaded hole 314, which is beneficial to improving the stability of the bolt connection, but also is beneficial to reducing the thickness of the body side hinge 31. At the same time, the reinforcing rib 312 is provided on the body side hinge 31, so that one end of the reinforcing rib 312 is connected to the mounting boss 311 and the other end is connected to the hinge connection hole 313, which can improve the stiffness of the hinge mounting point and realize the thin-walled of the body side hinge 31, thereby reducing the weight of the body side hinge 31 while ensuring the strength, and further improving the stability and reliability of the rear door during use and the user experience.

[0060] Please refer to Figures 4-6 , Figure 4 which is a schematic diagram of the overall structure of the rear door hinge provided by some embodiments of the present application, Figure 5 which is a schematic diagram of the mechanism of the body side hinge provided by some embodiments of the present application, Figure 6 which is a cross-sectional view of the body side hinge provided by some embodiments of the present application. In some embodiments, in the length direction of the body side hinge 31 (such as Figure 5 the X-axis direction shown), the height of the reinforcing rib 312 first gradually increases and then gradually decreases. Specifically, the reinforcing rib 312 may include a first reinforcing portion 3121 and a second reinforcing portion 3122. The first reinforcing portion 3121 may be connected to the side wall of the mounting boss 311. The second reinforcing portion 3122 may extend from the first reinforcing portion 3121 towards the hinge connection hole 313 and be connected to the hinge connection hole 313. Among them, the first reinforcing portion 3121 may extend from the side wall of the mounting boss 311 towards the hinge connection hole 313.

[0061] In the length direction of the body side hinge 31 (such as Figure 5 the X-axis direction shown), the height of the first reinforcing portion 3121 gradually increases, and the height of the second reinforcing portion 3122 gradually decreases. Specifically, there is a transition surface between the mounting boss 311 and the hinge connection hole 313. In the length direction of the body side hinge 31, the height of the reinforcing rib 312 first increases and then decreases, so the two sides of the reinforcing rib 312 are low and the middle is high. Among them, the reinforcing rib 312 may be formed in a "T" shape.

[0062] Thus, it is possible to avoid increasing the space of the rear door hinge 3 in the vehicle height direction, and it is also possible to improve the stiffness and strength of the transition surface between the hinge connection hole 313 and the mounting boss 311, so as to achieve the thinning of the body side hinge 31 while ensuring the strength of the body side hinge 31.

[0063] It should be noted that the height of the reinforcing rib 312 can also be changed according to the change of the structure of the body side hinge 31, and the present application does not limit this.

[0064] Exemplarily, the height of the lowest point of the first reinforcing portion 3121 can be lower than the height of the mounting boss 311, and such a setting can facilitate the forming of the rear door hinge 3.

[0065] Please refer to Figure 7 and Figure 8 , Figure 7 which are schematic views of the back door side hinge provided by some embodiments of the present application, Figure 8 and perspective views of the back door side hinge provided by some embodiments of the present application. In some embodiments, the rear door hinge 3 may further include a hinge mounting portion 33. The back door side hinge 32 may have a first end 321 and a second end 322. The first end 321 may be connected to the hinge connection hole 313. The second end 322 may be connected to the hinge mounting portion 33, and the width of the second end 322 is the same as the width of the hinge mounting portion 33. Specifically, the back door side hinge 32 may be formed in a gooseneck shape. The back door side hinge 32 has opposite first end 321 and second end 322. The first end 321 is rotatably connected to the body side hinge 31 through the hinge connection hole 313. The edge of the orthographic projection of the second end 322 on the hinge mounting portion 33 coincides with the edge of the hinge mounting portion 33, that is, the width of the cross-sectional area of the second end 322 is the same as the width of the hinge mounting portion 33.

[0066] Thus, it is possible to maximize the cross-sectional size of the second end 322 of the back door side hinge 32, improve the rigidity and strength of the rear door hinge 3, and avoid the fracture of the rear door hinge 3 between the back door side hinge 32 and the hinge mounting portion 33.

[0067] Please continue to refer to Figure 7 and Figure 8 , in some embodiments, a weight reduction groove 323 is provided on the side of the second end 322 close to the D-pillar inner panel 2, and the opposite side walls of the weight reduction groove 323 are connected to the hinge mounting portion 33. Specifically, the weight reduction groove 323 is located on the side of the second end 322 close to the D-pillar inner panel 2 and is recessed in a direction away from the D-pillar inner panel 2. The weight reduction groove 323 can be integrally formed in a "U" shape. Thus, the opposite side walls of the weight reduction groove 323 can serve as reinforcing rib plates, which is beneficial to ensuring the structural strength of the back door side hinge 32 and can also reduce the weight of the rear door hinge 3.

[0068] Please refer toFigures 9-11 , Figure 9 Schematic diagram of the lap joint structure between the hinge reinforcement plate and the inner D-pillar panel provided by some embodiments of the present application Figure 10 Schematic diagram of the inner D-pillar panel provided by some embodiments of the present application Figure 11 Schematic diagram of the hinge reinforcement plate provided by some embodiments of the present application. In some embodiments, the back door assembly 100 may further include a hinge reinforcement plate 4. The hinge reinforcement plate 4 may include a reinforcement body 41, a first flanging 42, a second flanging 43, a third flanging 44, and a fourth flanging 45. Bolt mounting process holes 21 are provided on the inner D-pillar panel 2. Bolt fixing holes 411 corresponding to the bolt mounting process holes 21 are provided on the reinforcement body 41. By passing bolts through the bolt fixing holes 411 and the threaded holes 314, the body side hinge 31 can be connected to the hinge reinforcement plate 4. The first flanging 42, the second flanging 43, the third flanging 44, and the fourth flanging 45 are sequentially arranged around the circumference of the reinforcement body 41 and are connected to the inner D-pillar panel 2. Specifically, the first flanging 42, the second flanging 43, the third flanging 44, and the fourth flanging 45 extend away from the edge of the reinforcement body 41, and the welding spots on the inner D-pillar panel 2 are arranged at intervals around the bolt mounting process holes 21.

[0069] Since the bolt mounting process holes 21 on the inner D-pillar panel 2 reduce the structural strength of the inner D-pillar panel 2. By forming a circular weld between the first flanging 42, the second flanging 43, the third flanging 44, and the fourth flanging 45 and the inner D-pillar panel 2 around the bolt mounting process holes 21, the bolt mounting process holes 21 can be closed and reinforced, which is beneficial to improving the structural strength of the hinge mounting points. At the same time, the hinge reinforcement plate 4 can directly use the bolt fixing holes 411 as positioning holes during welding, which can achieve multiple uses of one hole, is beneficial to simplifying the structure of the stamping die, and is beneficial to reducing the cost of the back door assembly 100.

[0070] Please continue to refer to Figures 9-11 , in some embodiments, the first flanging 42 can be connected to both the second flanging 43 and the fourth flanging 45, and the third flanging 44 can be connected to both the second flanging 43 and the fourth flanging 45. Thus, the hinge reinforcement plate 4 can form a semi-closed structure by itself, and the first flanging 42 structure can also be prevented from hanging outside the hinge reinforcement plate 4, which is beneficial to improving the integrity of the semi-closed hinge reinforcement plate 4, and thus beneficial to improving the structural strength and stiffness of the hinge reinforcement plate 4.

[0071] It should be noted that the stiffness of the hinge mounting points can also be improved by increasing the thickness of the hinge reinforcement plate 4 and the inner D-pillar panel 2.

[0072] Please refer to Figures 11-13 , Figure 12 Partial schematic diagram of the back door assembly provided by other embodiments of the present applicationFigure 13 A partial cross-sectional view of the rear door assembly provided for other embodiments of the present application. In some embodiments, the rear door assembly 100 may further include a connecting plate 5. The connecting plate 5 can be connected to the hinge reinforcement plate 4. The connecting plate 5 is provided with a body-side groove 51 and a rear-door-side groove 52. In the height direction of the rear door assembly 100 (such as Figure 13 the Z-axis direction shown), the body-side groove 51 is recessed in the direction close to the hinge reinforcement plate 4. Such a setting can avoid interference between the rear door hinge 3 and the vehicle roof after installation.

[0073] The body-side hinge 31 is arranged at the body-side groove 51. Specifically, a bolt connection hole 512 opposite to the threaded hole 314 can be formed on the body-side groove 21. By passing a bolt through the bolt connection hole 512, the bolt fixing hole 411 and the threaded hole 314, the body-side hinge 31 can be connected to the connecting plate 5.

[0074] In the length direction of the rear door assembly 100 (such as Figure 13 the X-axis direction shown), the rear-door-side groove 52 is recessed in the direction close to the hinge reinforcement plate 4, and the rear-door-side hinge 32 is located in the body-side groove 51. Thus, in the closed state of the rear door, the body-side groove 51 can better accommodate the rear-door-side hinge 32 with a large bending arc, which is beneficial to increasing the opening angle of the hinge.

[0075] Please continue to refer to Figure 12 and Figure 13 , in some embodiments, a first solder joint 511 is provided on the bottom wall of the body-side groove 51, and the body-side groove 51 is connected to the hinge reinforcement plate 4 through the first solder joint 511. A second solder joint 521 is provided on the side wall of the rear-door-side groove 52, and the rear-door-side groove 52 is connected to the hinge reinforcement plate 4 through the second solder joint 521. The second solder joint 521 can increase the stiffness of the hinge mounting point in the height direction of the vehicle by 100 N / mm, and the stiffness target value of the hinge mounting point is 1500 N / mm, so the stiffness can be increased by 6.7%. Thus, through the first solder joint 511 and the second solder joint 521, the hinge reinforcement plate 4 and the connecting plate 5 can simultaneously bear the load of the hinge in the height direction of the vehicle, which is beneficial to increasing the stiffness and strength of the mounting point of the rear door hinge 3.

[0076] Please refer to Figure 14 and Figure 15 , Figure 14 A schematic diagram of the inner panel reinforcement plate connection structure provided for some embodiments of the present application, Figure 15Exploded view of the rear door assembly provided by some embodiments of the present application. In some embodiments, the rear door assembly 100 may further include an inner panel reinforcement 6, a wheelhouse connection reinforcement 7, and a body reinforcement 8. The inner panel reinforcement 6 has a first connection end 61, a second connection end 62, a third connection end 63, and a fourth connection end 64. The first connection end 61 is opposite to the second connection end 62, the third connection end 63 is opposite to the fourth connection end 64. The first connection end 61 is connected to the connection plate 5, the second connection end 62 is connected to the wheelhouse connection reinforcement 7, the third connection end 63 is connected to the body reinforcement 8, and the fourth connection end 64 is connected to the D-pillar inner panel 2. Specifically, the first connection end 61 and the connection plate 5 can be connected by welding points, so as to support the connection plate 5. The second connection end 62 and the wheelhouse connection reinforcement 7 can be connected by welding points, the third connection end 63 and the body reinforcement 8 can be connected by structural adhesive, and the fourth connection end 64 and the D-pillar inner panel 2 can be connected by welding points.

[0077] Thus, the rear roof crossmember 1, the connection plate 5, the inner panel reinforcement 6, and the wheelhouse reinforcement form a load transfer channel, which can ensure the integrity of the vehicle rear structure and provide a good stiffness foundation for the hinge mounting points. At the same time, the rear roof crossmember 1, the connection plate 5, the inner panel reinforcement 6, and the wheelhouse connection reinforcement 7 can serve as the upper structure, and the D-pillar inner panel 2 and the wheelhouse inner panel can serve as the lower structure. The two parts can be connected by welding points to form an approximately closed beam structure, which is beneficial to improving the stiffness of the mounting points of the rear door hinge 3.

[0078] The vehicle according to the embodiments of the present application will be described below.

[0079] The embodiments of the present application provide a vehicle, including a rear door assembly 100. Such an arrangement can reduce the weight of the body side hinge 31 while ensuring strength, and further improve the stability and reliability of the rear door during use, as well as the user experience.

[0080] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0081] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A back door assembly, characterized in that: The back door assembly comprises: a roof rear cross beam, the roof rear cross beam extending in a width direction of the vehicle; A D-pillar inner plate, the D-pillar inner plate is connected to the rear cross beam of the roof; A tailgate hinge, the tailgate hinge comprises a body side hinge and a tailgate side hinge, a mounting boss is provided on a side of the body side hinge away from the D-pillar inner panel, a threaded hole is formed on the mounting boss, the body side hinge is connected to the D-pillar inner panel, a hinge connection hole is provided at one end of the body side hinge close to the tailgate side hinge, and the tailgate side hinge is rotatably connected to the body side hinge through the hinge connection hole.

2. The back door assembly according to claim 1, characterized in that: A reinforcing rib is also provided on the side of the body side hinge away from the D-pillar inner panel, one end of the reinforcing rib is connected to the mounting boss, and the other end is connected to the hinge connecting hole. In the length direction of the body side hinge, the height of the reinforcing rib first gradually increases and then gradually decreases.

3. The back door assembly according to claim 1, characterized in that: The rear tailgate hinge also includes a hinge mounting portion, the tailgate side hinge has a first end and a second end, the first end is connected to the hinge connecting hole, the second end is connected to the hinge mounting portion, and the width of the second end is the same as the width of the hinge mounting portion.

4. The back door assembly according to claim 3, characterized in that: A weight-reducing groove is provided on one side of the second end close to the inner plate of the D-pillar, and two opposite side walls of the weight-reducing groove are connected to the hinge mounting portion.

5. The back door assembly according to claim 1, characterized in that: The tailgate assembly also includes a hinge reinforcement plate, which includes a reinforcement body, a first flange, a second flange, a third flange and a fourth flange. A bolt installation process hole is provided on the D-pillar inner plate, and a bolt fixing hole opposite to the bolt installation process hole is provided on the reinforcement body. The first flange, the second flange, the third flange and the fourth flange are arranged in sequence around the circumference of the bolt installation process hole and are connected to the D-pillar inner plate.

6. The back door assembly according to claim 5, characterized in that: The first flange is connected to both the second flange and the fourth flange, and the third flange is connected to both the second flange and the fourth flange.

7. The back door assembly according to claim 5, characterized in that: The tailgate assembly also includes a connecting plate, which is connected to the hinge reinforcement plate. The connecting plate is provided with a body side groove and a tailgate side groove. In the height direction of the tailgate assembly, the body side groove is recessed toward the hinge reinforcement plate, and the body side hinge is arranged in the body side groove. In the length direction of the tailgate assembly, the tailgate side groove is recessed toward the hinge reinforcement plate, and the tailgate side hinge is located in the body side groove.

8. The back door assembly according to claim 7, characterized in that: A first welding point is provided on the bottom wall of the body side groove, and the body side groove is connected to the hinge reinforcement plate through the first welding point; a second welding point is provided on the side wall of the tail door side groove, and the tail door side groove is connected to the hinge reinforcement plate through the second welding point.

9. The back door assembly according to claim 7, characterized in that: The tailgate assembly also includes an inner panel reinforcement plate, a wheel house connection reinforcement plate and a vehicle body reinforcement plate, the inner panel reinforcement plate having a first connection end, a second connection end, a third connection end and a fourth connection end, the first connection end is opposite to the second connection end, the third connection end is opposite to the fourth connection end, the first connection end is connected to the connection plate, the second connection end is connected to the wheel house connection reinforcement plate, the third connection end is connected to the vehicle body reinforcement plate, and the fourth connection end is connected to the D-pillar inner panel.

10. A vehicle, characterized in that: It comprises a back door assembly according to any one of claims 1-9.

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