Vehicle back door assembly and vehicle

Abstract

The utility model discloses a vehicle back door assembly and a vehicle, and relates to the field of vehicles, the vehicle back door assembly comprises a back door inner plate and a back door outer plate, the back door inner plate and the back door outer plate are arranged along the length direction of the vehicle, the back door inner plate and the back door outer plate are connected and jointly define a cavity structure, and the cavity structure is arranged in the cavity structure. The back door inner plate is provided with a wire harness inlet and a wire harness outlet which are communicated with the cavity structure; and the wire harness penetrates through the wire harness inlet and the wire harness outlet, and part of the wire harness is located in the cavity structure. Therefore, the back door inner plate and the back door outer plate are connected and jointly define the cavity structure, and the part of the wire harness is located in the cavity structure, so that the interval between the back door trim and the back door inner plate can be reduced, the light-transmitting area of a rear windshield can be increased, and the rear view of the back door assembly can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle, especially a back door assembly of vehicle and vehicle. BACKGROUND

[0002] In the related art, the back door wire harness is arranged between the back door metal plate and the back door interior trim. With the increase of the electronic device function of the back door of the automobile, the diameter of the back door wire harness gradually increases, the space occupied by the back door wire harness becomes larger and larger, the interval between the back door metal plate and the back door interior trim becomes larger and larger, the back door interior trim gradually moves towards the inside of the vehicle, and the transparent area Y of the back window is occupied, which seriously affects the rear view of the back door structure. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide a back door assembly of vehicle, which can increase the light transmission area of the back window and improve the rear view of the back door assembly.

[0004] The utility model further provides a vehicle.

[0005] The back door assembly of the vehicle according to the utility model comprises a back door inner plate and a back door outer plate, the back door inner plate and the back door outer plate are arranged along the length direction of the vehicle, the back door inner plate and the back door outer plate are connected and jointly define a cavity structure, the back door inner plate has a wire harness inlet and a wire harness outlet which are communicated with the cavity structure, and a wire harness is arranged in the wire harness inlet and the wire harness outlet, and part of the wire harness is located in the cavity structure.

[0006] The back door assembly of the vehicle according to the utility model can reduce the interval between the back door interior trim and the back door inner plate, increase the light transmission area of the back window and improve the rear view of the back door assembly by connecting the back door inner plate and the back door outer plate and jointly defining a cavity structure and locating part of the wire harness in the cavity structure.

[0007] In some examples of the utility model, the back door assembly of the vehicle further comprises a hinge reinforcing plate, the hinge reinforcing plate is arranged in the cavity structure and connected with the back door inner plate, the hinge reinforcing plate has a wire harness through hole, the wire harness through hole is communicated with and corresponds to the wire harness inlet.

[0008] In some examples of the utility model, the hinge reinforcing plate has a guide structure, and the guide structure is used for guiding the wire harness.

[0009] In some examples of the present utility model, the width dimension of the guiding structure gradually decreases along the direction from the wire harness inlet to the wire harness outlet.

[0010] In some examples of the present utility model, the wire harness inlet extends along the height direction of the vehicle, and the height direction is perpendicular to the length direction.

[0011] In some examples of the present utility model, the rear back door assembly of the vehicle further comprises a damping member, at least part of the outer side of the wire harness is sleeved with the damping member, and the damping member is located in the cavity structure.

[0012] In some examples of the present utility model, the rear back door assembly of the vehicle further comprises a sealing member, the sealing member is arranged at the wire harness inlet, and the sealing member is used for sealing the gap between the peripheral wall of the wire harness inlet and the wire harness.

[0013] In some examples of the present utility model, the rear back door assembly of the vehicle further comprises a buffer member, the inner wall of the cavity structure is formed with a step portion, and the buffer member is arranged at the step portion.

[0014] In some examples of the present utility model, the rear back door assembly of the vehicle further comprises a support rod reinforcing plate, the support rod reinforcing plate is arranged in the cavity structure, and the support rod reinforcing plate is connected with the inner plate of the rear back door and jointly forms the step portion.

[0015] According to the vehicle of the present utility model, the rear back door assembly of the vehicle is described above.

[0016] Additional aspects and advantages of the present utility model will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0018] Figure 1 is a schematic view of the rear back door assembly according to the embodiment of the present utility model (omitting the outer plate of the rear back door);

[0019] Figure 2 is Figure 1 is a sectional view at A-A in FIG.

[0020] Figure 3 is an assembly schematic view of the inner plate of the rear back door and the support rod reinforcing plate according to the embodiment of the present utility model.

[0021] REFERENCE NUMERALS:

[0022] The back door assembly 100;

[0023] The back door inner plate 10;

[0024] The back door outer plate 20; the cavity structure 21;

[0025] The support rod reinforcing plate 30;

[0026] The wire harness 40; the wire harness inlet 41; the wire harness outlet 42; the wire harness via hole 43;

[0027] The back door inner trim 50; the hinge reinforcing plate 60; the guide structure 70;

[0028] The damping member 81; the sealing structure 82; the buffer member 83; the rear windshield 84; the vehicle body 85; the back door electric support rod 86. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used to explain the present application, and cannot be understood as a limitation of the present application.

[0030] Reference is made below to Figures 1-3 The back door assembly 100 of the vehicle according to the embodiments of the present application is described.

[0031] As Figures 1-3 shown, the back door assembly 100 according to the embodiments of the present application comprises: a back door inner plate 10, a back door outer plate 20 and a wire harness 40.

[0032] Along the length direction of the vehicle (i.e. Figure 2 X direction shown), the back door inner plate 10 and the back door outer plate 20 are arranged and disposed, the back door inner plate 10 and the back door outer plate 20 are connected and jointly define a cavity structure 21, the back door inner plate 10 has a wire harness inlet 41 and a wire harness outlet 42 which are in communication with the cavity structure 21; the wire harness 40 is arranged in the wire harness inlet 41 and the wire harness outlet 42, and part of the wire harness 40 is located in the cavity structure 21.

[0033] Among them, along the length direction of the vehicle (i.e. Figure 2 X direction shown), the back door inner plate 10 and the back door outer plate 20 are arranged and disposed in sequence, and the back door inner plate 10 and the back door outer plate 20 are connected and arranged, the connection mode of the back door inner plate 10 and the back door outer plate 20 can be but is not limited to welding, bolt connection and the like, as some embodiments of the present application, the back door inner plate 10 and the back door outer plate 20 are connected by welding.

[0034] As some embodiments of the present application, the back door inner panel 10 and the back door outer panel 20 are connected by a hemming process, and at the glass window frame, the back door inner panel 10 and the back door outer panel 20 are connected by a spot welding process.

[0035] The back door inner panel 10 and the back door outer panel 20 jointly define a cavity structure 21, that is, the back door inner panel 10 and the back door outer panel 20 jointly define a space that allows the wire harness 40 to pass through, the back door inner panel 10 has a wire harness inlet 41 and a wire harness outlet 42 that communicate with the cavity structure 21, the wire harness 40 can enter the cavity structure 21 through the wire harness inlet 41, and can pass out of the cavity structure 21 through the wire harness outlet 42, so that the wire harness 40 can pass through the wire harness inlet 41 and the wire harness outlet 42, and part of the wire harness 40 is located in the cavity structure 21.

[0036] As some embodiments of the present application, the back door assembly 100 further comprises a rear windshield 84, and a sealant is coated between the rear windshield 84 and the back door outer panel 20 to ensure the waterproof performance of the rear windshield 84, and the edge of the rear windshield 84 is provided with a cosmetic tape, which can ensure the aesthetics of the back door assembly 100.

[0037] As some embodiments of the present application, the glass black edge of the rear windshield 84 can be offset by a size of 5mm, but not limited to 5mm, according to the boundary of the back door trim 50, which can greatly increase the light transmission area of the rear windshield 84 in the Y direction.

[0038] After the wire harness 40 passes out of the wire harness outlet 42, the operator connects the wire harness 40 to the electronic devices of the back door assembly 100 to power the electronic devices.

[0039] It should be noted that by locating part of the wire harness 40 in the cavity structure 21, the wire harness 40 can be avoided to be arranged between the back door inner panel 10 and the back door trim 50, the cavity between the back door inner panel 10 and the back door trim 50 only needs to consider the structure of the back door trim 50 itself, thereby greatly reducing the cavity between the back door inner panel 10 and the back door trim 50, moving the back door trim 50 towards the outside of the vehicle to increase the light transmission area of the rear windshield 84, and the cavity structure 21 jointly defined by the back door inner panel 10 and the back door outer panel 20 not only can accommodate the wire harness 40, but also can improve the strength and rigidity of the back door assembly 100, which is beneficial to ensure the safety performance of the vehicle.

[0040] Therefore, by connecting the back door inner plate 10 and the back door outer plate 20 to jointly define the cavity structure 21, and by locating part of the wire harness 40 in the cavity structure 21, the spacing between the back door trim 50 and the back door inner plate 10 can be reduced, the light transmission area of the back windshield can be increased, and the rear view of the back door assembly 100 can be improved.

[0041] In some embodiments of the present application, as shown in Figures 1-3 The back door assembly 100 of the vehicle further includes a hinge reinforcing plate 60, which is arranged in the cavity structure 21 and connected with the back door inner plate 10. The hinge reinforcing plate 60 has a wire harness through hole 43, which is in communication with the wire harness inlet 41 and corresponds to the wire harness inlet 41.

[0042] The hinge reinforcing plate 60 is arranged in the cavity structure 21, and the hinge reinforcing plate 60 is connected with the back door inner plate 10. The connection mode of the hinge reinforcing plate 60 and the back door inner plate 10 can be welding, bolt connection, etc., but is not limited thereto. In some embodiments of the present application, the hinge reinforcing plate 60 is connected with the back door inner plate 10 by welding.

[0043] The hinge reinforcing plate 60 has a wire harness through hole 43, which is in communication with the wire harness inlet 41 and corresponds to the wire harness inlet 41. That is, the wire harness 40 can pass through the wire harness inlet 41, the wire harness through hole 43 of the hinge reinforcing plate 60 in sequence and extend into the cavity structure 21.

[0044] By arranging the hinge reinforcing plate 60 in the cavity structure 21 and connecting the hinge reinforcing plate 60 with the back door inner plate 10, the structural rigidity and strength of the back door assembly 100 can be improved, which helps the back door assembly 100 to distribute the load more evenly and reduce stress concentration, thereby improving the durability and use reliability of the back door assembly 100. In addition, by arranging the hinge reinforcing plate 60 with the wire harness through hole 43, and by arranging the wire harness through hole 43 in communication with the wire harness inlet 41 and corresponding to the wire harness inlet 41, the wire harness 40 can be avoided to smoothly extend into the cavity structure 21. In addition, the wire harness through hole 43 can position the wire harness 40 in the cavity structure 21, and the shaking amplitude of the wire harness 40 can be reduced.

[0045] In some embodiments of the present application, as shown in Figure 3As shown, the hinge reinforcing plate 60 has a guide structure 70 for guiding cooperation with the wire harness 40, by guiding cooperation of the guide structure 70 with the wire harness 40, the wire harness 40 can be guided by the guide structure 70, so that the wire harness 40 can smoothly move towards the wire harness outlet 42 after entering the cavity structure 21, so that the end of the wire harness 40 remains in the correct direction during installation, reduces the risk of misalignment or deviation of the wire harness 40 from the preset path, and reduces the difficulty of installation of the wire harness 40.

[0046] In some embodiments of the utility model, as shown in Figure 3 As shown, the width of the guide structure 70 gradually decreases in the direction from the wire harness inlet 41 to the wire harness outlet 42, in other words, the cross-sectional area of the guide structure 70 gradually decreases in the height direction of the vehicle (i.e. Figure 1 As shown in the Z direction), and from top to bottom, or it can be understood that the guide structure 70 is configured as a 'V' shaped structure, by gradually reducing the width of the guide structure 70 in the direction from the wire harness inlet 41 to the wire harness outlet 42, the guiding ability of the guide structure 70 can be improved, further reducing the risk of misalignment or deviation of the wire harness 40 from the preset path.

[0047] In some embodiments of the utility model, as shown in Figure 3 As shown, the wire harness inlet 41 extends in the height direction of the vehicle (i.e. Figure 1 As shown in the Z direction), and the height direction is perpendicular to the length direction.

[0048] Among them, the wire harness inlet 41 is formed in the back door inner plate 10, the wire harness inlet 41 extends in the height direction of the vehicle (i.e. Figure 1 As shown in the Z direction), in other words, the axis direction of the wire harness inlet 41 extends in the length direction of the vehicle (i.e. Figure 2 As shown in the X direction). Among them, the height direction of the vehicle (i.e. Figure 1 As shown in the Z direction) and the length direction of the vehicle (i.e. Figure 2 As shown in the X direction) are perpendicular to each other.

[0049] By extending the wire harness inlet 41 in the height direction of the vehicle (i.e. Figure 1 As shown in the Z direction), the wire harness 40 can be conveniently provided in the wire harness inlet 41, and the wire harness 40 can be conveniently extended downward through the wire harness inlet 41, which is beneficial to improve the assembly efficiency of the wire harness 40.

[0050] In some embodiments of the utility model, as shown in Figure 2 As shown, the back door assembly 100 of the vehicle further comprises: a damping piece 81, at least part of the outer side of the wire harness 40 is sleeved with the damping piece 81, and the damping piece 81 is located in the cavity structure 21.

[0051] As some embodiments of the present application, the outer side of at least part of the wire harness 40 is sleeved with the damping member 81, and the damping member 81 is located in the cavity structure 21.

[0052] As some embodiments of the present application, the damping member 81 can be configured as damping foam, and the outer side of the wire harness 40 can be sleeved with multiple layers of damping foam.

[0053] By sleeving the outer side of at least part of the wire harness 40 with the damping member 81 and locating the damping member 81 in the cavity structure 21, the probability and loudness of the wire harness 40 colliding with other components in the cavity structure 21 can be reduced, and the damping member 81 can protect the wire harness 40 to reduce the influence of external impact on the wire harness 40, especially when the vehicle is jolted or driven at high speed, the damage of the wire harness 40 due to vibration can be reduced, and the service life of the wire harness 40 is improved.

[0054] In some embodiments of the present application, as shown in Figure 1 The rear door assembly 100 of the vehicle further comprises a sealing member, which is arranged at the wire harness inlet 41 and used to seal the gap between the peripheral wall of the wire harness inlet 41 and the wire harness 40.

[0055] As some embodiments of the present application, the wire harness inlet 41 has a sealing groove, and part of the structure of the sealing member is arranged in the sealing groove to seal the gap between the peripheral wall of the wire harness inlet 41 and the wire harness 40.

[0056] By arranging the sealing member at the wire harness inlet 41, the risk of moisture penetrating into the cavity structure 21 through the gap between the wire harness inlet 41 and the wire harness 40 can be reduced, the dryness of the cavity structure 21 can be maintained, the safety of the wire harness 40 can be ensured, and the risk of dust and other impurities entering the cavity structure 21 through the gap between the wire harness inlet 41 and the wire harness 40 can also be reduced, so as to reduce the probability of the wire harness 40 being corroded by dust and other impurities.

[0057] As some embodiments of the present application, as shown in Figure 2 The sealing structure 82 (such as a sealing strip) is arranged at the metal stop of the rear door assembly 100, which can ensure the sealing performance of the rear door assembly 100 and the vehicle body 85.

[0058] In some embodiments of the present application, as shown in Figure 2 The rear door assembly 100 of the vehicle further comprises a buffer member 83, and the inner wall of the cavity structure 21 forms a stepped portion, and the buffer member 83 is arranged at the stepped portion.

[0059] As some embodiments of this application, Figure 2 As shown, the tailgate assembly 100 further includes a strut reinforcement plate 30, which forms a step portion with the tailgate inner panel 10. A buffer member 83 is disposed at the step portion formed by the strut reinforcement plate 30 and the tailgate inner panel 10. In some embodiments of the present application, the buffer member 83 can be constructed as a buffer film, which can be disposed on the step portion after being coated and baked (it can also be understood as filling the step portion). It is understood that the step portion is not limited to being formed by the strut reinforcement plate 30 and the tailgate inner panel 10, but can also be formed by other structures on the inner wall of the cavity structure 21, such as, but not limited to, a step portion formed by a reinforcement rib and the tailgate inner panel 10.

[0060] By arranging the buffer part 83 on the step portion, the probability of the wire harness 40 being blocked by the raised step portion when passing through the step portion can be reduced, and the wire harness 40 can be smoothly passed through the wire harness outlet 42 in the case of blind operation, so that the wire harness 40 can pass through the cavity structure 21 more smoothly. In addition, such an arrangement can also protect the wire harness 40, reduce the probability of the sharp edge of the step portion scratching the wire harness 40, and help to improve the reliability of the back door assembly 100.

[0061] In some embodiments of the present invention, Figure 2 As shown, the vehicle tailgate assembly 100 further includes a strut reinforcement plate 30 , which is disposed in the cavity structure 21 . The strut reinforcement plate 30 is connected to the tailgate inner panel 10 and together forms a step portion.

[0062] That is, the tailgate assembly 100 further includes a support rod reinforcement plate 30, which together with the tailgate inner panel 10 forms a step portion, and the buffer member 83 is arranged on the step portion formed by the support rod reinforcement plate 30 and the tailgate inner panel 10. The buffer member 83 can be arranged on the step portion after being painted and baked.

[0063] By arranging the support rod reinforcement plate 30 in the cavity structure 21 and connecting it to the tailgate inner panel 10, the structural strength and rigidity of the tailgate assembly 100 can be improved, and it can be ensured that the tailgate assembly 100 can maintain stability and firmness when frequently used or subjected to external forces. In addition, the support rod reinforcement plate 30 can provide support for the tailgate electric support rod 86 of the tailgate assembly 100, which is beneficial to improving the reliability of the tailgate assembly 100. Moreover, the buffer member 83 is arranged on the step portion, which can reduce the impact of the setting of the support rod reinforcement plate 30 on the installation of the wiring harness 40, so that the wiring harness 40 can be smoothly passed through to the wiring harness outlet 42 in the case of blind operation.

[0064] According to the vehicle of the embodiment of the utility model, the rear back door assembly 100 of the vehicle of the above -mentioned embodiment, through make rear back door inner plate 10 and rear back door outer plate 20 connect and jointly define cavity structure 21, and make the part of wire harness 40 be located in cavity structure 21, can reduce the interval between rear back door interior 50 and rear back door inner plate 10, can increase rear windshield light transmission area, improve rear view of rear back door assembly 100.

[0065] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0066] In the description of the utility model, "first feature" and "second feature" can include one or more features.

[0067] In the description of the utility model, "a plurality of" means two or more.

[0068] In the description of the utility model, "above" or "below" of the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0069] In the description of the utility model, "above", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.

[0070] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A back door assembly of a vehicle, characterized by, The utility model relates to a back door assembly of a vehicle, comprising: a back door inner panel and a back door outer panel arranged along a length direction of the vehicle, the back door inner panel and the back door outer panel being connected and jointly defining a cavity structure, the back door inner panel having a wire harness inlet and a wire harness outlet communicating with the cavity structure; a wire harness passing through the wire harness inlet and the wire harness outlet, and a portion of the wire harness being located in the cavity structure.

2. The rear door assembly of claim 1, wherein, Further comprising: a hinge reinforcing plate located in the cavity structure and connected with the back door inner panel, the hinge reinforcing plate having a wire harness via hole corresponding to the wire harness inlet.

3. The rear door assembly of claim 2, wherein, The hinge reinforcing plate has a guide structure for guiding the wire harness.

4. The tailgate assembly of claim 3, wherein, The width dimension of the guide structure gradually decreases along a direction from the wire harness inlet to the wire harness outlet.

5. The rear door assembly of claim 1, wherein, The wire harness inlet extends along a height direction of the vehicle, the height direction being perpendicular to the length direction.

6. The rear door assembly of claim 1, wherein, Further comprising: a damping member sleeved on at least a portion of the wire harness, and the damping member being located in the cavity structure.

7. The rear door assembly of claim 1, wherein Further comprising: a sealing member located at the wire harness inlet, the sealing member being used for sealing a gap between a peripheral wall of the wire harness inlet and the wire harness.

8. The tailgate assembly of claim 1, wherein, Further comprising: a buffer member located at a stepped portion of an inner wall of the cavity structure.

9. The rear door assembly of claim 8, wherein, Further comprising: a strut reinforcing plate located in the cavity structure, the strut reinforcing plate being connected with the back door inner panel and jointly forming the stepped portion.

10. A vehicle characterized by comprising: The utility model relates to a back door assembly of a vehicle, comprising: a back door inner panel and a back door outer panel arranged along a length direction of the vehicle, the back door inner panel and the back door outer panel being connected and jointly defining a cavity structure, the back door inner panel having a wire harness inlet and a wire harness outlet communicating with the cavity structure; a wire harness passing through the wire harness inlet and the wire harness outlet, and a portion of the wire harness being located in the cavity structure. Further comprising: a hinge reinforcing plate located in the cavity structure and connected with the back door inner panel, the hinge reinforcing plate having a wire harness via hole corresponding to the wire harness inlet. The hinge reinforcing plate has a guide structure for guiding the wire harness. The width dimension of the guide structure gradually decreases along a direction from the wire harness inlet to the wire harness outlet. The wire harness inlet extends along a height direction of the vehicle, the height direction being perpendicular to the length direction. Further comprising: a damping member sleeved on at least a portion of the wire harness, and the damping member being located in the cavity structure. Further comprising: a sealing member located at the wire harness inlet, the sealing member being used for sealing a gap between a peripheral wall of the wire harness inlet and the wire harness. Further comprising: a buffer member located at a stepped portion of an inner wall of the cavity structure. Further comprising: a strut reinforcing plate located in the cavity structure, the strut reinforcing plate being connected with the back door inner panel and jointly forming the stepped portion. The utility model relates to a back door assembly of a vehicle, comprising: a back door inner panel and a back door outer panel arranged along a length direction of the vehicle, the back door inner panel and the back door outer panel being connected and jointly defining a cavity structure, the back door inner panel having a wire harness inlet and a wire harness outlet communicating with the cavity structure; a wire harness passing through the wire harness inlet and the wire harness outlet, and a portion of the wire harness being located in the cavity structure. Further comprising: a hinge reinforcing plate located in the cavity structure and connected with the back door inner panel, the hinge reinforcing plate having a wire harness via hole corresponding to the wire harness inlet. The hinge reinforcing plate has a guide structure for guiding the wire harness. The width dimension of the guide structure gradually decreases along a direction from the wire harness inlet to the wire harness outlet. The wire harness inlet extends along a height direction of the vehicle, the height direction being perpendicular to the length direction. Further comprising: a damping member sleeved on at least a portion of the wire harness, and the damping member being located in the cavity structure. Further comprising: a sealing member located at the wire harness inlet, the sealing member being used for sealing a gap between a peripheral wall of the wire harness inlet and the wire harness. Further comprising: a buffer member located at a stepped portion of an inner wall of the cavity structure. Further comprising: a strut reinforcing plate located in the cavity structure, the strut reinforcing plate being connected with the back door inner panel and jointly forming the stepped portion. The utility model relates to a back door assembly of a vehicle, comprising: a back door inner panel

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