Back door supporting mechanism, back door assembly and vehicle

Abstract

The present application relates to a back door support mechanism, a back door assembly and a vehicle, wherein, in the back door support mechanism, a first connecting plate and a second connecting plate are fixedly arranged on different planes of a back door inner frame, the first connecting plate and the second connecting plate are connected by a first side plate of a reinforcing structure respectively, the back door support mechanism is integrated, the first side plate and a second side plate are connected with a back door panel respectively, and the support function of the back door panel is realized. The first side plate is a single plate body, has high connection strength and high bearing capacity, can meet the requirements of back door support, and has compact and simple structure of the first side plate and the second side plate, avoids the arrangement of a large amount of materials, and realizes the lightweight arrangement of the overall materials. The present application effectively solves the problem that the support structure between the back door inner frame and the back door panel in the prior art cannot simultaneously meet the requirements of structural strength and structural lightweight.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a back door supporting mechanism, a back door assembly and a vehicle. BACKGROUND

[0002] With the development of social economy and the improvement of people's living standards, the per capita ownership of automobiles in China is increasing, especially in cities, where household cars can be seen at any time. With the development of vehicles, people have higher requirements for the comfort of riding, and the NVH characteristics (Noise, Vibration, Harshness) of vehicles are a comprehensive problem for measuring the quality of automobile manufacturing, which is the most direct and superficial feeling for automobile users.

[0003] One of the key factors affecting the NVH characteristics of a vehicle is the vibration of the vehicle body. As an important and large closed part in the vehicle body system, the back door forms a closed cavity system with other closed parts. Improving the NVH performance of the back door from the beginning has a more direct effect on the control of interior noise.

[0004] The back door is a closed part located at the rear of the vehicle to protect and cover the passengers or stored objects. The back door generally includes a back door inner panel assembly and a back door outer panel assembly. A support structure is usually provided between the back door inner panel and the back door outer panel. The support structure can effectively improve the NVH performance of the back door. The support structure in the prior art includes Z-type, claw-type or box-type. The Z-type support plate has weak strength and is easily deformed by external force, and the stability of the support is poor. The claw-type and box-type structures are complex and have large parts, which is not conducive to the lightweight of the vehicle body. SUMMARY

[0005] The present application provides a back door supporting mechanism, a back door assembly and a vehicle to solve the problem that the support structure between the back door inner frame and the back door panel in the prior art cannot simultaneously meet the requirements of structural strength and lightweight.

[0006] The present application provides a back door supporting mechanism, comprising: a reinforcing structure and a connecting structure, the reinforcing structure comprising a first side plate and a second side plate; the connecting structure comprising a first connecting plate and a second connecting plate, the first side plate and the second side plate being respectively fixedly connected to the same side of the first connecting plate, the first side plate being fixedly connected to the second connecting plate, the first connecting plate and the second connecting plate being respectively connected to different planes of a back door inner frame, and the first side plate and the second side plate being respectively connected to a back door panel.

[0007] Further, the second side plate is fixedly connected to the second connecting plate.

[0008] Further, the plane where the first connecting plate is located and the plane where the second connecting plate is located are arranged at an obtuse angle.

[0009] Further, the first side plate is provided with a first flange near one side of the back door panel, the first flange is in gap fit with the back door panel, the second side plate is provided with a second flange near one side of the back door panel, and the second flange is in gap fit with the back door panel.

[0010] Further, one or more first grooves can be arranged on one side of the first flange facing the back door panel, and the first grooves are used for glue coating, and one or more second grooves can be arranged on one side of the second flange facing the back door panel, and the second grooves are used for glue coating.

[0011] Further, the first flange extends away from the second side plate, the first flange and the first side plate are in an integral molding structure, the first flange and the first side plate are transitioned through a circular arc, the second flange extends away from the first side plate, the second flange and the second side plate are in an integral molding structure, and the second flange and the second side plate are transitioned through a circular arc.

[0012] Further, the first side plate and the first connecting plate are in an integral molding structure, and the first side plate and the first connecting plate are transitioned through a circular arc, the second side plate and the first connecting plate are in an integral molding structure, and the second side plate and the first connecting plate are transitioned through a circular arc.

[0013] Further, the first connecting plate and the second connecting plate are fixedly connected with the back door inner frame through welding.

[0014] Further, the first side plate is provided with one or more positioning through holes, and the positioning through holes are used for positioning before welding of the back door supporting mechanism.

[0015] Further, the first side plate is provided with one or more first weight-reducing holes, and / or the second side plate is provided with one or more second weight-reducing holes.

[0016] The application also provides a back door assembly, characterized in that the back door assembly comprises a back door supporting mechanism, a back door inner frame and a back door panel, the back door supporting mechanism is the back door supporting mechanism described above, the back door supporting mechanism is fixedly connected with the back door inner frame through welding, and the back door supporting mechanism is fixedly connected with the back door panel.

[0017] The application also provides a vehicle, characterized in that the vehicle comprises a back door assembly and a vehicle body, the back door assembly is the back door assembly described above, and the back door assembly is installed on the vehicle body.

[0018] The application has the following beneficial effects:

[0019] The application fixes the first connecting plate and the second connecting plate on different planes of the back door inner frame, connects the first connecting plate and the second connecting plate through the first side plate of the reinforcing structure respectively, connects the first side plate and the second side plate with the back door panel respectively, and realizes the supporting effect of the back door panel. The first side plate is a single plate body, has high connection strength and high bearing capacity, can meet the requirements of the back door support, the structure of the first side plate and the second side plate is compact and simple, a large amount of material is avoided, and the overall material is lightened. The application effectively solves the problem that the supporting structure between the back door inner frame and the back door panel in the prior art cannot meet the requirements of structural strength and structural lightening at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown;

[0021] Figure 2 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown; Figure 1 A side view schematic view of a back door supporting structure is shown;

[0022] Figure 3 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown; Figure 1 An installation schematic view of a back door supporting structure is shown;

[0023] Figure 4 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown; Figure 1 A sectional view schematic view of a back door supporting structure is shown;

[0024] Figure 5 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown;

[0025] Figure 6 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown;

[0026] Figure 7 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown;

[0027] Figure 8 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown;

[0028] Figure 9 A perspective structural schematic view of a back door supporting structure provided by an embodiment of the application is shown; Figure 8 A top view schematic view of a back door supporting structure is shown;

[0029] Figure 10 A partial sectional view schematic view of a back door assembly provided by an embodiment of the application is shown;

[0030] Figure 11 A partial sectional view schematic view of a back door assembly provided by an embodiment of the application is shown; Figure 10 An internal assembly schematic view of a back door assembly is shown;

[0031] Figure 12 shown Figure 10 Partial enlarged schematic view of the back door assembly.

[0032] Wherein, 10, reinforcing structure; 11, first side plate; 111, positioning through hole; 112, first lightening hole; 12, second side plate; 121, second lightening hole; 13, first flange; 14, second flange; 15, first groove body; 16, second groove body; 20, connecting structure; 21, first connecting plate; 22, second connecting plate; 30, back door inner frame; 31, back door support frame; 32, door lock reinforcing structure; 33, back door wiper reinforcing structure; 34, back door inner frame main body; 40, back door panel. DETAILED DESCRIPTION

[0033] Other advantages and effects of the present application can be easily understood by those skilled in the art from the above description of the application. The present application can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made to the details of the present application based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, but not for limiting the protection scope of the present application.

[0034] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the drawings, but not drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout pattern of the components can also be more complex.

[0035] For the convenience of description, spatial relative terms such as "above", "upper", "top", "up", etc. can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned at 90 degrees or in other orientations in other different ways, and the spatial relative description used herein is interpreted accordingly.

[0036] As Figures 1 to 4As shown in the figure, Embodiment 1 of the present invention provides a rear door support mechanism, including: a strengthening structure 10, the strengthening structure 10 includes a first side plate 11 and a second side plate 12; a connecting structure 20, the connecting structure 20 includes a first connecting plate 21 and a second connecting plate 22, the first side plate 11 and the second side plate 12 are respectively fixedly connected to the same side of the first connecting plate 21, the first side plate 11 is fixedly connected to the second connecting plate 22, the first connecting plate 21 and the second connecting plate 22 are respectively connected to different planes of the rear door inner frame 30, and the first side plate 11 and the second side plate 12 are respectively connected to the rear door panel 40. By fixedly arranging the first connecting plate 21 and the second connecting plate 22 on different planes of the rear door inner frame 30, and then connecting the first connecting plate 21 and the second connecting plate 22 respectively through the first side plate 11 of the strengthening structure 10, the rear door support mechanism is integrated. Then, by connecting the first side plate 11 and the second side plate 12 to the rear door panel 40 respectively, the support function of the rear door panel 40 is realized. The first side plate 11 is a single plate body, with strong connection strength and high bearing capacity, which can meet the requirements of rear door support. At the same time, the setting structures of the first side plate 11 and the second side plate 12 are compact and simple, avoiding the setting of a large amount of materials and realizing the lightweight setting of the overall materials. This application effectively solves the problem that the support structure between the rear door inner frame 30 and the rear door panel 40 in the prior art cannot meet the requirements of both structural strength and structural lightweight at the same time.

[0037] It should be noted that, as Figure 4 shown, in the technical solution of Embodiment 1, after the first side plate 11 and the second side plate 12 are fixedly connected to the first connecting plate 21, at least one of the first side plate 11 and the second side plate 12 inclines in the direction away from the first connecting plate 21, forming a "ji" - shaped structure. Such a structural setting makes part of the force received by the first connecting plate 21 turn into the force in its plane, which can be transmitted to the other side plate through the first connecting plate 21, avoiding the phenomenon of damage caused by stress concentration and improving the overall force - bearing upper limit of the rear door support mechanism.

[0038] As Figure 2 shown, in the technical solution of Embodiment 1, the plane where the first connecting plate 21 is located and the plane where the second connecting plate 22 is located are set at an obtuse angle. Such a setting enables the force of the first side plate 11 to be transmitted in different directions to different components when transmitted, thereby reducing the possibility of vibration, improving the noise reduction ability of the vehicle, and enhancing the experience of passengers. It should be noted that, as Figure 2The first side plate 11 shown plays the role of a reinforcing rib, is overall arched, and can cope with impact loads from the back door panel. The arched arrangement can also be various, and in the embodiment is only one of them. Specifically, the first side plate 11 is an integral molding structure, the two connection positions of the first side plate 11 simultaneously contact the first connecting plate 21 and the second connecting plate 22, the plate body connected between the two connection positions is linearly arranged, the overall shape is similar to a handle, and the first side plate 11 will decompose the force acting according to the angle of the connection position and the linear plate body when stressed, dispersing the force acting to different positions of the vehicle frame, reducing the possibility of vibration, and also increasing the structural strength of the back door support mechanism.

[0039] As shown in Figures 1 to 4 In the technical solution of the first embodiment, the first side plate 11 is provided with a first flange 13 on the side close to the back door panel 40, the first flange 13 is gap-fitted with the back door panel 40, the second side plate 12 is provided with a second flange 14 on the side close to the back door panel 40, and the second flange 14 is gap-fitted with the back door panel 40. The purpose of providing the first flange 13 and the second flange 14 is to increase the contact area between the back door panel 40 and the back door support mechanism, thereby increasing the strength of the back door panel 40. The gap-fitting of the first flange 13 with the back door panel 40 and the gap-fitting of the second flange 14 with the back door panel 40 facilitates the filling of a buffer in the gap formed, the buffer is used for vibration absorption, reduces the occurrence of noise, and improves the NVH performance of the back door. It should be noted that the side of the back door panel 40 facing the back door support mechanism can be a plane or a curved surface, and the first flange 13 and the second flange 14 are provided as a plane or a curved surface corresponding to the back door panel 40. Such an arrangement makes the gap between the first flange 13 or the second flange 14 and the back door panel 40 uniform, and the uniform gap further reduces the possibility of noise occurrence, which is more conducive to the quietness of the vehicle cabin.

[0040] As shown in Figure 1 and Figure 4 In the technical solution of the first embodiment, the first flange 13 extends in a direction away from the second side plate 12, the first flange 13 is an integral molding structure with the first side plate 11, and the first flange 13 and the first side plate 11 are transitioned through a circular arc. The second flange 14 extends in a direction away from the first side plate 11, the second flange 14 is an integral molding structure with the second side plate 12, and the second flange 14 and the second side plate 12 are transitioned through a circular arc. The circular arc transition avoids stress concentration, can decompose the force acting through the circular arc when subjected to force, increases the area subjected to force, avoids the setting of a corner, and further avoids the phenomenon of high load in the force process at the corner, which is prone to damage.

[0041] As shown in Figures 1 to 4As shown, in the technical solution of Embodiment 1, the first side plate 11 and the first connecting plate 21 are integrally formed, and the first side plate 11 and the first connecting plate 21 are connected by an arc. The second side plate 12 and the first connecting plate 21 are also integrally formed, and the second side plate 12 and the first connecting plate 21 are connected by an arc. The arc transition avoids stress concentration and can decompose the force when subjected to force, increasing the force-bearing area and avoiding the need for corners. This prevents excessive load at corners, which could easily lead to damage. The arc transitions between the first flange 13 and the first side plate 11, the first side plate 11 and the first connecting plate 21, the first connecting plate 21 and the second side plate 12, and the second side plate 12 and the second flange 14 enable the entire back door support mechanism to balance the force at a certain point, decompose and absorb the force in multiple stages, increase the overall strength, and reduce the possibility of stress concentration causing damage to the support mechanism.

[0042] In the technical solution of Embodiment 1 (not shown in the figure), the first connecting plate 21 and the second connecting plate 22 are fixedly connected to the inner frame 30 of the tailgate by welding. Welding fixes the tailgate support mechanism. Welding is simple and direct, reduces the number of assembly parts, better suits the complex internal components of the tailgate, and ensures reliable connection. Furthermore, welding expands the application range of the tailgate support mechanism. By adding welding layers or connecting structures, dimensional matching is achieved, and finally, the components are welded together, resulting in a wider range of applications and lower operational difficulty. In some alternative embodiments, spot welding is used to weld the first connecting plate 21 and the second connecting plate 22. It should be noted that multiple welding surfaces can be provided on the first connecting plate 21 and the second connecting plate 22, and these welding surfaces intersect. Specifically, the first connecting plate 21 has two welding surfaces. In the projection of the first connecting plate 21 along the direction perpendicular to the welding surfaces, the first connecting plate 21 is in a "U" shape, meaning that there is an independently set plane above the welding surface. This arrangement creates space between the welding surfaces, effectively coping with deformation during welding and preventing irreversible deformation of the entire connecting plate. The second connecting plate 22 has two welding surfaces that intersect. In the projection of the second connecting plate 22 along a direction perpendicular to the welding surfaces, the two welding surfaces are set at an obtuse angle. This arrangement is to accommodate the welding position of the inner frame 30 of the back door. The above-described welding surface arrangement is only one possible embodiment of this application.

[0043] like Figure 2As shown, in the technical solution of Embodiment 1, the first side plate 11 is provided with one or more positioning through holes 111. The positioning through holes 111 are used for positioning before welding of the back door support mechanism. Providing multiple positioning through holes 111 enables precise positioning before welding. Specifically, a pin hole is provided at the corresponding position of the back door inner frame 30. Before welding, the pin hole is aligned with the positioning through hole 111, and a detachable pin is inserted into the pin hole after passing through the positioning through hole 111 to form a positioning. At this time, the back door support mechanism is fixed, and welding can then fix the back door support mechanism and the back door inner frame 30 together. Further, when there is one positioning through hole 111, the positioning through hole 111 and the pin are set as square holes or polygonal holes, and the corresponding pin adopts a polygonal structure. When there are multiple positioning through holes 111, since there are multiple limiting points, the degree of freedom can be controlled, so the shape of the hole is not restricted, as long as it can cooperate with the back door inner frame. Specifically, two circular positioning through holes 111 can be used, and cylindrical or conical detachable pins can be used for positioning connection.

[0044] like Figure 1 and Figure 2 As shown, in the technical solution of Embodiment 1, the first side panel 11 is provided with one or more first weight-reducing holes 112, and / or the second side panel 12 is provided with one or more second weight-reducing holes 121. Providing weight-reducing holes on the first side panel 11 and the second side panel 12 can effectively reduce the weight of the side panel itself, thereby reducing the weight of the tailgate assembly and even the vehicle, achieving a lightweight design. It should be noted that both the first weight-reducing holes 112 and the second weight-reducing holes 121 are elongated holes with rounded corners. This avoids excessive reduction in the strength of the side panel after the weight-reducing holes are provided. When multiple weight-reducing holes are required, reinforcing ribs can be provided at the intervals between the holes to increase the structural strength of the side panel with small-volume ribs. The volume of the ribs is much smaller than the volume of material cut at the weight-reducing holes.

[0045] In some embodiments provided in this application, one or more first grooves 15 may be provided on the side of the first flange 13 facing the back door panel 40. The first grooves 15 are used for applying adhesive. One or more second grooves 16 may be provided on the side of the second flange 14 facing the back door panel 40. The second grooves 16 are also used for applying adhesive. The first grooves 15 and the second grooves 16 facilitate the storage of adhesive during the adhesive application process. Using adhesive application to connect the back door support mechanism and the back door panel 40 provides partial connection and fixation for the back door panel 40. The grooves increase the amount of adhesive, resulting in a larger bonding area between the solidified adhesive and the first flange 13 and the second flange 14, leading to a more reliable bond. It should be noted that the overall area of ​​the tailgate panel 40 is relatively large. For aesthetic reasons, the tailgate panel 40 is designed as a single piece and fixed around its perimeter with fasteners. This results in the middle area of ​​the tailgate panel 40 being suspended. During vehicle operation, the thin-walled characteristics of the tailgate panel 40 are prone to vibration and abnormal noise, which is detrimental to the NVH performance of the tailgate assembly. By connecting with the tailgate support mechanism, the tailgate panel 40 can be effectively supported and fixed, thereby reducing the occurrence of this situation.

[0046] It should be noted that expanding adhesive or structural adhesive is used in the first tank 15 and the second tank 16. Expanding adhesive or structural adhesive has advantages such as high strength, ability to withstand large loads, aging resistance, fatigue resistance, and corrosion resistance. It has stable performance within its expected lifespan and is suitable for bonding structural components that bear strong forces. Furthermore, both expanding adhesive and structural adhesive have a certain volume, which can withstand micro-elastic deformation after solidification, absorb vibration, and thus attenuate vibration and reduce noise.

[0047] In some embodiments provided in this application, the second side plate 12 is fixedly connected to the second connecting plate 22. That is, the second side plate 12 also serves to connect and reinforce the first connecting plate 21 and the second connecting plate 22, making the entire tailgate support mechanism more stable and providing better support. This connects the first connecting plate 21, the first side plate 11, the second connecting plate 22, and the second side plate end to end, providing higher strength.

[0048] Specifically, such as Figure 1 As shown, in the technical solution of Embodiment 1, two first grooves 15 are provided on the first flange 13, and a second groove 16 is provided on the second flange 14. The first side plate 11 is connected between the first connecting plate 21 and the second connecting plate 22, and the second side plate 12 is only connected to the first connecting plate 21. The width of the second side plate 12 is smaller than that of the first side plate 11. That is, the back door support mechanism in Embodiment 1 has three glued connection areas.

[0049] like Figure 5As shown in the embodiment two, the first flange 13 is relatively short, and only one first groove 15 is arranged on the first flange 13, which can reduce the material setting of the first flange 13 and further make the back door support mechanism lighter while ensuring the connecting effect of the back door panel 40.

[0050] As shown in the embodiment three, the first flange 13 is arranged closer to the second connecting plate 22, which makes the connected area of the first groove 15 and the second groove 16 larger after the glue connection, and the vibration absorption effect is better, that is, the light weight is met while the connecting effect of the back door panel 40 is enhanced. Figure 6 As shown in the embodiment four, the second side plate 12 is fixedly connected with the second connecting plate 22, the first connecting plate 21, the first side plate 11, the second connecting plate 22 and the second side plate 12 are connected end to end, the first flange 13 is arranged on the first side plate 11 close to the first connecting plate 21, and the first groove 15 is arranged on the first flange 13, the second flange 14 is arranged on the second side plate 12 close to the second connecting plate 22, and the second groove 16 is arranged on the second flange 14, which can not only make the area surrounded by the first groove 15 and the second groove 16 larger, but also enhance the structural strength of the first connecting plate 21, the first side plate 11, the second connecting plate 22 and the second side plate 12.

[0051] Figure 7 As shown in the embodiment five, the length of the first flange 13 is relatively long, and two first grooves 15 are arranged on the first flange 13, the length of the second flange 14 is relatively long, and two second grooves 16 are arranged on the second flange 14, which can make the connection of the back door panel 40 more stable and the noise reduction effect best.

[0052] As shown in the embodiment six, the length of the first flange 13 is relatively long, and two first grooves 15 are arranged on the first flange 13, the length of the second flange 14 is relatively long, and two second grooves 16 are arranged on the second flange 14, which can make the connection of the back door panel 40 more stable and the noise reduction effect best. Figure 8 Figure 9 As shown in the embodiment five, the length of the first flange 13 is relatively long, and two first grooves 15 are arranged on the first flange 13, the length of the second flange 14 is relatively long, and two second grooves 16 are arranged on the second flange 14, which can make the connection of the back door panel 40 more stable and the noise reduction effect best.

[0053] ​​In combination with Embodiment One to Embodiment Five, it can be concluded that the back door support mechanism can be set according to actual needs, and can make multiple choices between the connection effect with the back door panel 40 and its own lightweight, and the slot bodies at different positions and the number of slot bodies can cope with back door panels 40 of different sizes and different areas. It should be noted that in the above embodiments, the length and width of the first slot body 15 or the second slot body 16 can be adjusted as needed to meet the requirements of connection, and further, the spacing between adjacent slot bodies and the number can also be adjusted. The back door support mechanism has four important structural parameters: the slot body transverse spacing of the first slot body 15 or the second slot body 16, the slot body longitudinal spacing, the number of the first slot body 15 or the second slot body 16, and the length of the slot body. Adjusting the above four parameters can obtain more deformation types of the back door support mechanism.

[0054] Embodiment One to Embodiment Five are all "J" type back door support mechanisms, and the back door support mechanism is fixedly connected with the door lock reinforcing structure 32 and the back door support frame 31 through the first connecting plate 21 and the second connecting plate 22, respectively, thereby improving the overall connection strength. In order to improve the position accuracy of the back door support mechanism between the back door support frames 31, two positioning through holes 111 are arranged on the first side plate 11. At the same time, through the first side plate 11, the part structure strength can be effectively strengthened. The first side plate 11 and the second side plate 12 are respectively provided with weight reduction holes, and the position, number and size of the weight reduction holes can be adjusted as needed to meet the requirements of lightweight design. The first side plate 11 and the second side plate 12 are provided with the first flange 13 and the second flange 14, and the first flange 13 and the second flange 14 are respectively provided with the first slot body 15 and the second slot body 16 for glue filling, and the expansion glue or structural glue is selected. The back door support mechanism is formed into a side wall structure by outwardly bending the flange at the welding edge, and the side wall is further bent outwardly to form a glue-coated flange. In order to avoid stress concentration between the connected flange structures, the connected flange structures are transitioned with a round corner to improve the connection reliability between the two adjacent flange structures and avoid damage caused by stress concentration. Finally, a structure with a "J" shape in the transverse section and a "J" shape in the longitudinal section is presented.

[0055] As Figures 10 to 12As shown, the embodiment six of the present application provides a back door assembly, the back door assembly comprising a back door support mechanism, a back door inner frame 30 and a back door panel 40, the back door support mechanism being the back door support mechanism of any one of the embodiments one to five, the back door support mechanism being fixedly connected with the back door inner frame 30 by welding, and the back door support mechanism being fixedly connected with the back door panel 40. Wherein, the back door inner frame 30 comprises a back door support frame 31, a door lock reinforcing structure 32, a back door wiper reinforcing structure 33 and a back door inner frame body 34, and the back door inner frame body 34 is connected with the vehicle body. The back door wiper reinforcing structure 33 is used for installing the wiper structure at the back door, the back door wiper reinforcing structure 33 is installed on the top of the back door inner frame body 34, the back door support frame 31 is used for installing the parts of the back door assembly and providing the support of the base body, and is fixedly installed in the middle of the back door inner frame body 34 by welding, and the door lock reinforcing structure 32 installed at the bottom is used for installing the parts related to the door lock. The welding position of the door lock reinforcing structure 32 and the back door support frame 31 where the back door support mechanism is arranged is used for fixedly welding the back door support mechanism, and the back door support mechanism ensures the connection of the two and provides the support. Such structure can better adapt to the support inside the back door, effectively improve the overall modal, stiffness, road noise performance and NTF performance of the back door, so as to effectively alleviate the back door noise generated by the road vibration. It should be noted that in the technical solution of the embodiment, the back door support mechanism is two, which is symmetrically arranged on the back door support frame 31, and the support effect and stability are better.

[0056] After the back door support mechanism (symmetrically arranged on the left and right), the door lock reinforcing structure 32 and the back door support frame 31 are combined into a small assembly, the welding surface provided by the door lock reinforcing structure 32 and the back door support frame 31 is connected with the back door inner frame body 34 and the back door wiper reinforcing structure 33, and finally the back door inner panel assembly is formed. The back door panel 40 is finally formed into the back door assembly after being edge-welded with the back door inner panel assembly. Through the above structure, a multi-section support structure is formed between the back door inner frame body 34 and the back door panel 40, which can greatly improve the overall stiffness of the back door assembly. At the same time, since the back door support mechanism and the back door panel 40 are connected by gluing, it has a certain vibration absorption effect on vibration, thereby further attenuating vibration and reducing noise.

[0057] The present application also provides a vehicle, which comprises a back door assembly and a vehicle body, the back door assembly being the back door assembly in the embodiment six, and the back door assembly being installed on the vehicle body. Such vehicle can accurately strengthen the thinnest part of the back door panel 40, so as to achieve the purpose of optimizing the performance of the back door assembly, thereby more accurately optimizing the bending stiffness, torsional stiffness, modal performance, road noise performance and NTF performance of the back door assembly, and further effectively reducing the noise generated by the road vibration and the opening and closing of the back door, alleviating the sensitivity of consumers to the back door system noise, and improving the subjective quality of the whole vehicle.

[0058] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, as the scope of the exemplary embodiments of this application is intended to be broader than the limitations included in the terminology used. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0059] It is to be understood that the terms "first", "second", and the like, used herein do not necessarily connote any order, quantity, composition, or importance, but are used to distinguish one element from another, and do not necessarily indicate a requirement or order. It is to be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0060] The above embodiments are only preferred examples for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the present application shall fall within the protection scope of the present application.

Claims

1. A back door support mechanism characterized by, The utility model relates to a kind of reinforcing structure and connecting structure of back door, including: Reinforcing structure (10), the reinforcing structure (10) includes first side plate (11) and second side plate (12); Connecting structure (20), the connecting structure (20) includes first connecting plate (21) and second connecting plate (22), the first side plate (11) and the second side plate (12) are fixedly connected with the same side of the first connecting plate (21) respectively, the first side plate (11) is fixedly connected with the second connecting plate (22), the first connecting plate (21) and the second connecting plate (22) are connected on different planes of back door inner frame (30) respectively, the first side plate (11) and the second side plate (12) are connected with back door panel (40) respectively; At least one of the first side plate (11) and the second side plate (12) is inclined in the direction away from the first connecting plate (21), forming a " " character structure, so that the force acting on the first connecting plate (21) is partially diverted to the plane of the first connecting plate (21), and the force is transmitted to the other side plate through the first connecting plate (21), to avoid stress concentration.

2. The back door support mechanism of claim 1, wherein, The second side plate (12) is fixedly connected with the second connecting plate (22).

3. Back door support mechanism according to any of claims 1 or 2, characterized in that The plane of the first connecting plate (21) and the plane of the second connecting plate (22) are arranged at an obtuse angle.

4. The back door support mechanism of claim 3, wherein, The first side plate (11) is provided with a first flange (13) on the side close to the back door panel (40), and the first flange (13) is in gap cooperation with the back door panel (40). The second side plate (12) is provided with a second flange (14) on the side close to the back door panel (40), and the second flange (14) is in gap cooperation with the back door panel (40).

5. The back door support mechanism of claim 4, wherein, The side of the first flange (13) facing the back door panel (40) can be provided with one or more first grooves (15) for glue coating, and the side of the second flange (14) facing the back door panel (40) can be provided with one or more second grooves (16) for glue coating.

6. The back door support mechanism of claim 4, wherein, The first flange (13) extends in the direction away from the second side plate (12), and the first flange (13) and the first side plate (11) are an integral molding structure, and the first flange (13) and the first side plate (11) are transitioned through a circular arc. The second flange (14) extends in the direction away from the first side plate (11), and the second flange (14) and the second side plate (12) are an integral molding structure, and the second flange (14) and the second side plate (12) are transitioned through a circular arc.

7. The back door support mechanism of claim 6, wherein, The first side plate (11) and the first connecting plate (21) are an integral molding structure, and the first side plate (11) and the first connecting plate (21) are transitioned through a circular arc. The second side plate (12) and the first connecting plate (21) are an integral molding structure, and the second side plate (12) and the first connecting plate (21) are transitioned through a circular arc.

8. The back door support mechanism of claim 3, wherein, The first connecting plate (21) and the second connecting plate (22) are fixedly connected with the back door inner frame (30) by welding.

9. The back door support mechanism of claim 8, wherein, The first side plate (11) is provided with one or more positioning through holes (111) for positioning before welding of the back door support mechanism.

10. The back door support mechanism according to any one of claims 1 or 2, characterized in that, The first side plate (11) is provided with one or more first weight-reducing holes (112), and / or the second side plate (12) is provided with one or more second weight-reducing holes (121).

11. A back door assembly characterized by, The back door assembly comprises a back door support mechanism, a back door inner frame (30) and a back door panel (40), the back door support mechanism is the back door support mechanism according to any one of claims 1 to 10, the back door support mechanism is fixedly connected with the back door inner frame (30) by welding, and the back door support mechanism is fixedly connected with the back door panel (40).

12. A vehicle characterized by comprising: The vehicle comprises a back door assembly and a vehicle body, the back door assembly is the back door assembly according to claim 11, and the back door assembly is installed on the vehicle body.

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