Vehicle door lower trim panel, vehicle door assembly and vehicle

Abstract

The utility model provides a vehicle door lower trim panel, a vehicle door assembly and a vehicle, the vehicle door lower trim panel comprises a vehicle door lower trim panel body, and the upper end of the vehicle door lower trim panel body is provided with a buckling part used for being matched with a clamping hole of a vehicle door sheet metal part in a clamping mode; the inserting structure is rotatably connected to the lower end of the car door lower trim panel body, and the inserting structure is provided with an inserting groove used for being matched with a metal plate wrapping edge of a car door metal plate in an inserting mode. According to the embodiment, the car door lower trim panel is detachably connected with the metal plate wrapping edge of the car door sheet metal part through the rotationally-installed inserting structure, and the problems that the maintainability is poor, and the cost is high due to the fact that the car door lower trim panel is bonded and fixed through a double-sided adhesive tape are solved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a lower door trim panel, a door assembly, and a vehicle. Background Technology

[0002] In the related technology of door components, the upper end of the lower door trim panel is engaged with the door sheet metal via clips, and the lower end of the lower door trim panel is adhered to the sheet metal edge of the door sheet metal via double-sided tape. This solution has the following drawbacks:

[0003] First, poor maintainability: Double-sided tape is not maintainable. When repairing the lower door trim panel of a vehicle after-sales service, it is necessary to completely remove the tape residue and clean it thoroughly. Moreover, the original lower door trim panel will be damaged after being removed, and a brand new lower door trim panel can only be replaced. The repair time and cost are high, and it is also not environmentally friendly.

[0004] Secondly, the cost is high: On the one hand, because the lower door trim panel is relatively long, a large amount of double-sided tape is used, and the performance requirements of automotive double-sided tape are high, resulting in a high price, which leads to a high unit cost of the lower door trim panel; on the other hand, because assembly workers need to apply a primer and remove the protective film of the tape before assembly, and reduce the operation speed to avoid bonding errors, and the use of double-sided tape requires control of the workshop temperature, the manufacturing and rework costs are high. Utility Model Content

[0005] The purpose of this application is to provide a lower door trim panel, a door assembly, and a vehicle, which solves the problems of poor maintainability and high cost caused by using double-sided tape to fix the lower door trim panel.

[0006] To solve the above-mentioned technical problems, this application provides a lower door trim panel, including:

[0007] The lower door trim panel body has a snap-fit ​​part at its upper end for engaging with the snap-fit ​​hole of the door sheet metal part;

[0008] A plug-in structure is rotatably connected to the lower end of the lower trim panel body of the door, and the plug-in structure has a plug-in groove for interlocking with the sheet metal edging of the door sheet metal part.

[0009] In this embodiment, the lower door trim panel achieves a detachable connection with the sheet metal edging of the door panel through a rotating and plug-in structure, which has the following advantages:

[0010] First, it is easy to maintain: When repairing the lower door trim panel of a vehicle, only two forces need to be applied to the lower door trim panel to remove the panel body. There is no tape residue, and the original lower door trim panel will not be damaged during the disassembly process. The repair time and cost are low, and it is environmentally friendly.

[0011] Secondly, the cost is low: the lower door trim panel does not require double-sided tape to be bonded and fixed to the door sheet metal parts, resulting in a low unit cost. On the other hand, the lower door trim panel and the sheet metal edge are connected through the interlocking structure and the interlocking cooperation of the sheet metal edge, which simplifies the assembly process, improves assembly efficiency, and reduces assembly costs.

[0012] Optionally, the lower door trim panel further includes:

[0013] The deformable part connects the lower door trim panel body and the plug-in structure.

[0014] Optionally, the minimum thickness of the deformable part is D, and the value of D is in the range of 0.8mm≤D≤1mm.

[0015] Optionally, the length of the deformable part is L1, and the value of L1 is in the range of: L1≥2mm.

[0016] Optionally, the lower trim panel body of the door can rotate relative to the plug-in structure by an angle α, and the value of α is in the range of α≥90°.

[0017] Optionally, there may be multiple plug-in structures, which are spaced apart along the width direction of the lower trim panel body of the door.

[0018] Optionally, the lower door trim panel body includes an outer panel and an inner panel connected to the inner side of the outer panel. The plug-in structure is connected to the lower end of the inner panel. In the assembled state, there is a gap between the plug-in structure and the inner wall of the outer panel.

[0019] This embodiment also provides a door assembly, including:

[0020] A car door sheet metal part, wherein the upper end of the car door sheet metal part has a snap-fit ​​hole and the lower end of the car door sheet metal part has a sheet metal edge.

[0021] The aforementioned lower door trim panel is located on the outside of the door sheet metal part. The snap-fit ​​part of the lower door trim panel is engaged with the snap-fit ​​hole, and the insertion groove of the lower door trim panel is engaged with the sheet metal edging.

[0022] The door assembly of this embodiment includes the aforementioned lower door trim panel, and therefore has the same technical effect as the aforementioned lower door trim panel, which will not be described again here.

[0023] Optionally, the fitting clearance between the sheet metal edging and the insertion groove is G, and the value of G ranges from 0mm to 0.1mm.

[0024] Optionally, the overlap length between the sheet metal edging and the insertion groove is L2, and the value range of L2 is: L2≥5mm.

[0025] Optionally, the door assembly further includes:

[0026] A support member is connected to one of the inner wall of the lower door trim panel and the outer wall of the door sheet metal part, the other of which abuts against the support member.

[0027] Optionally, the number of the support members is at least one, and the support members are located between at least one set of two adjacent plug-in structures.

[0028] Optionally, the door assembly further includes:

[0029] A shielding component is connected to the inner wall of the door sheet metal component, the shielding component shields the plug-in structure and the distance between the plug-in structure and the inner wall of the outer panel.

[0030] This embodiment also provides a vehicle including the aforementioned door assembly.

[0031] The vehicle in this embodiment includes the aforementioned door assembly, and therefore has the same technical effects as the aforementioned door assembly, which will not be repeated here. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of a specific embodiment of the lower door trim panel provided in this application;

[0033] Figure 2 for Figure 1 First-stage diagram of the lower door trim panel during assembly;

[0034] Figure 3 for Figure 1 Second phase diagram of the assembly process of the lower door trim panel;

[0035] in, Figure 1-Figure 3 The accompanying figure labels are as follows:

[0036] 1-Lower door trim panel; 11-Lower door trim panel body; 111-Outer panel; 112-Inner panel; 12-Snap-on part; 13-Interlocking structure; 13a-Interlocking groove; 14-Deformable part;

[0037] 2-Door sheet metal parts; 21-Sheet metal edging;

[0038] 3-Supporting components;

[0039] 4-Shielding component. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] In this article, when the door assembly is installed on the vehicle body, the direction closer to the roof is "up", the direction closer to the bottom is "down", the direction closer to the interior of the vehicle body is "inside", the direction closer to the exterior of the vehicle body is "outside", and the direction from the front to the rear of the vehicle body is the width direction of the door assembly (lower door trim panel 1).

[0042] Please refer to Figure 1-Figure 3 , Figure 1 This is a structural schematic diagram of a specific embodiment of the lower door trim panel provided in this application; Figure 2 for Figure 1 First-stage diagram of the lower door trim panel during assembly; Figure 3 for Figure 1 The second state diagram of the lower door trim panel during the assembly process.

[0043] This embodiment provides a lower door trim panel 1, including:

[0044] The lower door trim panel body 11 has a snap-fit ​​part 12 at its upper end for engaging with the snap-fit ​​hole of the door sheet metal part 2.

[0045] The plug-in structure 13 is rotatably connected to the lower end of the lower trim panel body 11 of the door. The plug-in structure 13 has a plug-in groove 13a for plugging and engaging with the sheet metal edging 21 of the door sheet metal part 2.

[0046] The assembly process of the lower door trim panel 1 to the door sheet metal part 2 in this embodiment is as follows:

[0047] First, insert the sheet metal edging 21 of the door sheet metal part 2 into the insertion slot 13a, and rotate the lower door trim panel body 11 away from the door sheet metal part 2 to avoid interference between the lower door trim panel body 11 and the door sheet metal part 2. Figure 2 As shown; after the insertion structure 13 and the sheet metal edging 21 are connected, the lower door trim panel body 11 is rotated towards the door sheet metal part 2 until the latching part 12 of the lower door trim panel 1 and the latching hole of the door sheet metal part 2 are engaged, thus completing the assembly of the lower door trim panel body 11 and the door sheet metal part 2. Figure 3 As shown.

[0048] The disassembly process of the lower door trim panel 1 in this embodiment is as follows:

[0049] First, an outward force is applied to the lower door trim panel 1, causing the latching part 12 of the lower door trim panel 1 to disengage from the snap-fit ​​hole of the door sheet metal part 2; then, a downward force is applied to the lower door trim panel 1, causing the insertion structure 13 of the lower door trim panel 1 to disengage from the sheet metal edging 21, thus completing the disassembly of the lower door trim panel body 11.

[0050] As can be seen, in this embodiment, the lower door trim panel 1 achieves a detachable connection with the sheet metal edging 21 of the door sheet metal part 2 by designing a rotating and installing plug-in structure 13, which has the following advantages:

[0051] First, it is easy to maintain: When repairing the lower door trim panel 1 after vehicle maintenance, only two forces need to be applied to the lower door trim panel 1 to remove it. There is no tape residue, and the original lower door trim panel 1 will not be damaged during the disassembly process. The repair time and cost are low, and it is environmentally friendly.

[0052] Secondly, the cost is low: the lower door trim panel 1 does not need to be bonded to the door sheet metal part 2 with double-sided tape, saving the cost of double-sided tape and reducing the unit cost of the lower door trim panel 1; on the other hand, the connection between the lower door trim panel body 11 and the door sheet metal part 2 is achieved through the interlocking structure 13 and the sheet metal edging 21, which simplifies the assembly process, improves assembly efficiency, and reduces assembly costs.

[0053] Among them, the buckle part 12 is a commonly used fastener. The structure of the buckle part 12 is not limited. The buckle parameters can be selected according to the assembly motion simulation of the lower door trim panel 1 (rotation and sliding of the plug structure 13). Generally, it is required that the length of the selected buckle part 12 be as short as possible to reduce the buckling resistance.

[0054] Please continue to refer to Figure 1-Figure 3 In this embodiment, the lower door trim panel 1 further includes:

[0055] The deformable part 14 connects the lower door trim panel body 11 and the plug-in structure 13, allowing the lower door trim panel body 11 and the plug-in structure 13 to rotate relative to each other.

[0056] The deformable part 14, as the name suggests, can deform under force, so that the angle between the lower door trim panel body 11 and the plug structure 13 changes, ensuring that the lower door trim panel 1 will not interfere with the door sheet metal 2 during the assembly or disassembly process, and ensuring reliable connection or smooth disassembly of the lower door trim panel 1 and the door sheet metal 2.

[0057] The deformable part 14 can be implemented in various ways. Specifically, in some embodiments of this application, the structure of the deformable part 14 is weakened by physical thinning, the structural strength of the deformable part 14 is reduced, and the deformable part 14 has the ability to deform, so as to realize the rotatable connection between the lower door trim panel body 11 and the plug-in structure 13 and meet the angle adjustment requirements between the lower door trim panel body 11 and the plug-in structure 13.

[0058] The minimum thickness of the deformable part 14 is D, and the value of D is in the range of 0.8mm≤D≤1mm.

[0059] Specifically, D can take values ​​of 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, etc. Verification has shown that when D < 0.8mm, the deformable part 14 is too thin, its structural strength is lower than required, and it may break under stress during use. Conversely, when D > 1mm, the deformable part 14 is too thick, its structural strength is higher than required, and its deformation capability is insufficient, limiting the angle adjustment between the lower door trim panel body 11 and the connecting structure 13. Therefore, in this embodiment, the minimum thickness of the deformable part 14 has the above-mentioned range, ensuring that its structural strength is within the required range, preventing breakage under stress during use, and guaranteeing its deformation capability. This ensures that the angle adjustment range between the lower door trim panel body 11 and the connecting structure 13 meets the installation and removal requirements of the lower door trim panel 1.

[0060] Depend on Figure 1 As can be seen, in this embodiment, the thickness of the deformable part 14 gradually decreases from both ends to the middle, that is, the thickness of the deformable part 14 is large at both ends and small in the middle. In some embodiments of this application, the minimum thickness of the middle part of the deformable part 14 is 0.8mm and the maximum thickness at both ends is 1.6mm. This structure, which is thin in the middle and thick at both ends, not only enables the deformable part 14 to have deformation capability, but also helps to improve the connection reliability between the deformable part 14 and the lower trim panel body 11 of the door, and between the deformable part 14 and the plug-in structure 13.

[0061] Of course, in practice, the deformable part 14 is not limited to the above-mentioned structural form. For example, it is also feasible for the thickness of the deformable part 14 to gradually shrink from one end to the other end. In this case, the deformable part 14 deforms from the thinner end.

[0062] Furthermore, the lower door trim panel body 11 can rotate relative to the plug-in structure 13 by an angle α, and the value of α is in the range of α≥90°.

[0063] Depend on Figure 2 and Figure 3It can be seen that during the installation of the lower door trim panel 1, the lower door trim panel body 11 can be rotated about 45° to achieve assembly with the door sheet metal part 2. In some embodiments of this application, the angle at which the lower door trim panel body 11 can rotate relative to the plug-in structure 13 is designed to be no less than 90°. On the one hand, the lower door trim panel 1 can be molded according to the state of rotation of 90°, which reduces the design difficulty, is conducive to the design of the lower door trim panel 1 to be narrower, reduces the demolding difficulty, and improves the molding efficiency of the lower door trim panel 1. On the other hand, it is more convenient for workers to operate when assembling the lower door trim panel 1.

[0064] Furthermore, the length of the deformable part 14 is L1, and the value range of L1 is: L1≥2mm.

[0065] Specifically, L1 can take values ​​of 2mm, 2.1mm, 2.3mm, 2.5mm, 2.8mm, etc. Verification has shown that when L1 < 2mm, the angle adjustment between the lower door trim panel body 11 and the insertion structure 13 is limited. After the insertion structure 13 and the door sheet metal part 2 are assembled, the engagement of the latching part 12 and the latching hole of the door sheet metal part 2 is difficult, reducing assembly efficiency. Therefore, in this embodiment, the length of the deformable part 14 has the above-mentioned range to ensure that the angle adjustment range between the lower door trim panel body 11 and the insertion structure 13 meets the loading and unloading requirements of the lower door trim panel 1, ensuring smooth assembly of the lower door trim panel 1 and the door sheet metal part 2, and improving assembly efficiency.

[0066] In some other embodiments of this application, the deformable part 14 is made of a flexible material and is integrally injection molded with the lower door trim panel body 11 and the plug-in structure 13 using an insert injection molding process. The flexible material can be a mesh fabric or the like.

[0067] As described above, this embodiment uses a flexible component as an injection molding insert and integrally injection molded with the lower door trim panel body 11 and the insertion structure 13 to achieve a rotatable connection between the lower door trim panel body 11 and the insertion structure 13. The flexible component itself has the characteristic of deformation, which meets the angle adjustment requirements between the lower door trim panel body 11 and the insertion structure 13.

[0068] Furthermore, in this embodiment, there are multiple plug-in structures 13, which are distributed at intervals along the width direction of the lower trim panel body 11 of the door.

[0069] As described above, the lower door trim panel 1 is fitted into the sheet metal edging 21 of the door sheet metal part 2 through at least one plug-in structure 13. The number of plug-in structures 13 can be adapted to the connection requirements of the lower door trim panel 1 and the door sheet metal part 2 to ensure reliable connection between the lower door trim panel 1 and the door sheet metal part 2.

[0070] Please continue to refer to this. Figure 1In this embodiment, the lower door trim panel body 11 includes an outer panel 111 and an inner panel 112 connected to the inner side of the outer panel 111. The outer panel 111 is the appearance part of the lower door trim panel 1, which reflects the vehicle's shape and color texture. The inner panel 112 is the fixing part of the lower door trim panel 1, which reflects the various positioning and fixing structures of the lower door trim panel 1 and the door sheet metal part 2. The outer panel 111 can be connected to the inner panel 112 by welding or bonding.

[0071] Furthermore, the plug-in structure 13 is connected to the lower end of the inner plate 112, and in the assembled state, there is a gap between the plug-in structure 13 and the inner wall of the outer plate 111.

[0072] Combination Figure 2 and Figure 3 It is understood that during the assembly of the lower door trim panel 1, when the sheet metal edging 21 of the door sheet metal part 2 is inserted into the insertion groove 13a, the distance between the insertion structure 13 and the inner wall of the outer panel 111 allows the outer panel 111 to have rotational space to rotate towards the insertion structure 13, thereby enabling the lower door trim panel body 11 to rotate away from the door sheet metal part 2, thus avoiding interference between the outer panel 111 and the insertion structure 13.

[0073] This embodiment also provides a door assembly, including:

[0074] The car door sheet metal part 2 has a snap-fit ​​hole at the upper end and a sheet metal edging 21 at the lower end.

[0075] The aforementioned lower door trim panel 1 is located on the outside of the door sheet metal part 2. The snap-fit ​​part 12 of the lower door trim panel 1 is engaged with the snap-fit ​​hole, and the insertion groove 13a of the lower door trim panel 1 is engaged with the sheet metal edging 21.

[0076] The door assembly of this embodiment includes the aforementioned lower door trim panel 1, and therefore has the same technical effect as the aforementioned lower door trim panel 1, which will not be repeated here.

[0077] Furthermore, in this embodiment, the fitting clearance between the sheet metal edging 21 and the insertion groove 13a is G, and the value range of G is: 0mm < G ≤ 0.1mm.

[0078] Specifically, G can take values ​​of 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, etc. During assembly, the insertion slot 13a needs to be able to slide up and down along the sheet metal edge 21 to ensure that the buckle part 12 can rotate and insert into the snap hole of the door sheet metal part 2. The specific sliding amount is designed based on the assembly motion simulation. Therefore, the fit gap between the sheet metal edge 21 and the insertion slot 13a needs to be greater than 0. The smaller the fit gap between the sheet metal edge 21 and the insertion slot 13a, the more reliable the connection between the sheet metal edge 21 and the insertion slot 13a. It has been verified that when the fit gap between the sheet metal edge 21 and the insertion slot 13a is not greater than 1mm, the connection strength between the sheet metal edge 21 and the insertion slot 13a can meet the requirements.

[0079] Based on this, the fitting clearance between the sheet metal edging 21 and the insertion groove 13a has the above range of values, which ensures that the buckle part 12 can be rotated and inserted into the buckling hole of the door sheet metal part 2, ensuring the smooth assembly of the lower door trim panel 1 and the door sheet metal part 2, and also ensures that the connection strength between the sheet metal edging 21 and the insertion groove 13a can meet the requirements, thereby improving the connection reliability of the lower door trim panel 1 and the door sheet metal part 2.

[0080] Furthermore, in this embodiment, the overlap length of the sheet metal edge 21 and the insertion groove 13a is L2, and the value range of L2 is: 5mm≤L2≤10mm.

[0081] Specifically, L2 can take values ​​of 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. Verification has shown that when L2 < 5mm, the overlap length between the sheet metal edging 21 and the insertion groove 13a is short, resulting in insufficiently secure assembly. When L2 > 10mm, the molding of the insertion structure 13 becomes difficult, reducing the molding efficiency of the lower door trim panel 1. Therefore, in this embodiment, the overlap length between the sheet metal edging 21 and the insertion groove 13a has the above-mentioned value range, ensuring both the secure assembly of the sheet metal edging 21 and the insertion groove 13a and improving the process feasibility of the lower door trim panel 1, thus increasing the molding efficiency of the lower door trim panel 1.

[0082] Please continue to refer to this. Figure 1 In this embodiment, the door assembly further includes:

[0083] Support member 3 is connected to one of the inner wall of the lower door trim panel 1 and the outer wall of the door sheet metal part 2, and the other of the inner wall of the lower door trim panel 1 and the outer wall of the door sheet metal part 2 abuts against the support member 3.

[0084] Depend on Figure 1As can be seen, when the lower door trim panel 1 is connected to the door sheet metal part 2, there is a gap between the inner wall of the lower door trim panel 1 and the outer wall of the door sheet metal part 2. If the support member 3 is not provided, the lower door trim panel 1 will need to be subjected to the impact force by the deformable part 14 when it is hit. The deformable part 14 may crack and be damaged due to excessive force.

[0085] Based on this, a support member 3 is added in this embodiment. The support member 3 is supported between the inner wall of the lower door trim panel 1 and the outer wall of the door sheet metal part 2. The support member 3 can share part of the impact force when the lower door trim panel 1 is hit, so as to avoid the deformable part 14 from cracking and being damaged due to excessive force.

[0086] Among them, the support component 3 can be made of flexible materials such as felt, rubber, and nylon. The support component 3 can also play a role in shock absorption and avoid generating impact noise.

[0087] The support member 3 is preferably connected to the inner wall of the lower door trim panel 1, which is more feasible in terms of process. The support member 3 and the inner wall of the lower door trim panel 1 can be fixed by adhesive bonding. This fixing method has the advantages of reliable connection and convenient operation.

[0088] The specific number of support members 3 is not limited, as long as it ensures that the deformable part 14 will not crack or be damaged under stress. For example, the number of support members 3 can be at least one, and the support members 3 are located between at least one set of two adjacent plug-in structures 13. In some embodiments of this application, the plug-in structures 13 and support members 3 are arranged alternately, and both sides of each plug-in structure 13 are supported by support members 3 to ensure the structural stability of each deformable part 14.

[0089] In addition, the door assembly in this embodiment also includes:

[0090] The shielding component 4 is connected to the inner wall of the door sheet metal component 2. The shielding component 4 shields the insertion structure 13 and the distance between the insertion structure 13 and the inner wall of the outer panel 111.

[0091] As mentioned above, there is a gap between the plug-in structure 13 and the inner wall of the outer panel 111 to prevent the rotation of the lower door trim panel body 11 during assembly from interfering with the plug-in structure 13. Therefore, if no shielding is provided, after the door is opened, passengers can not only see part of the plug-in structure 13, but also the gap between the plug-in structure 13 and the inner wall of the outer panel 111, which reduces the quality of the door components, affects the user experience, and the exposed plug-in structure 13 may be kicked by passengers, causing damage and reducing the service life of the plug-in structure 13.

[0092] Based on this, the door assembly in this embodiment is provided with a shield 4, which shields the plug-in structure 13 and the distance between the plug-in structure 13 and the inner wall of the outer panel 111, thereby improving the cleanliness of the door assembly, enhancing the quality of the door assembly, and improving the user experience. At the same time, the shield 4 can also protect the plug-in structure 13, preventing it from being kicked by passengers and causing damage, and extending the service life of the plug-in structure 13.

[0093] The connection method between the shielding part 4 and the door sheet metal part 2 is not limited. For example, the shielding part 4 and the door sheet metal part 2 can be glued and fixed, or the shielding part 4 has a snap-fit ​​part and the door sheet metal part 2 has a snap-fit ​​hole. The snap-fit ​​part and the snap-fit ​​hole are engaged to fix the shielding part 4 and the door sheet metal part 2.

[0094] This embodiment also provides a vehicle including the aforementioned door assembly.

[0095] The vehicle in this embodiment includes the aforementioned door assembly, and therefore has the same technical effects as the aforementioned door assembly, which will not be repeated here.

[0096] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A lower door trim panel, characterized in that, include: The lower trim panel body (11) of the car door has a buckle part (12) at the upper end for engaging with the snap-fit ​​hole of the door sheet metal part (2). The plug-in structure (13) is rotatably connected to the lower end of the door lower trim panel body (11), and the plug-in structure (13) has a plug-in groove (13a) for plugging and engaging with the sheet metal edging (21) of the door sheet metal part (2).

2. The lower door trim panel according to claim 1, characterized in that, The lower door trim panel also includes: The deformable part (14) connects the lower door trim panel body (11) and the plug-in structure (13).

3. The lower door trim panel according to claim 2, characterized in that, The minimum thickness of the deformable part (14) is D, and the value range of D is: 0.8mm≤D≤1mm.

4. The lower door trim panel according to claim 2, characterized in that, The length of the deformable part (14) is L1, and the value range of L1 is: L1≥2mm.

5. The lower door trim panel according to any one of claims 1-4, characterized in that, The lower trim panel body (11) of the car door can rotate relative to the plug structure (13) by an angle α, and the value range of α is: α≥90°.

6. The lower door trim panel according to any one of claims 1-4, characterized in that, The number of the plug-in structures (13) is multiple, and the multiple plug-in structures (13) are distributed at intervals along the width direction of the lower trim panel body (11) of the door.

7. The lower door trim panel according to any one of claims 1-4, characterized in that, The lower door trim panel body (11) includes an outer panel (111) and an inner panel (112) connected to the inner side of the outer panel (111). The plug-in structure (13) is connected to the lower end of the inner panel (112). In the assembled state, there is a gap between the plug-in structure (13) and the inner wall of the outer panel (111).

8. A door assembly, characterized in that, include: The car door sheet metal part (2) has a snap-fit ​​hole at the upper end and a sheet metal edging (21) at the lower end. The lower door trim panel (1) according to any one of claims 1-7, wherein the lower door trim panel (1) is located on the outside of the door sheet metal part (2), the snap-fit ​​part (12) of the lower door trim panel (1) and the snap-fit ​​hole are engaged, and the insertion groove (13a) of the lower door trim panel (1) and the sheet metal edging (21) are engaged.

9. The door assembly according to claim 8, characterized in that, The fitting clearance between the sheet metal edging (21) and the insertion groove (13a) is G, and the value range of G is: 0mm < G ≤ 0.1mm.

10. The door assembly according to claim 8, characterized in that, The overlap length of the sheet metal edging (21) and the insertion groove (13a) is L2, and the value range of L2 is: 5mm≤L2≤10mm.

11. The door assembly according to claim 8, characterized in that, The door assembly also includes: Support member (3) is connected to one of the inner wall of the lower door trim panel (1) and the outer wall of the door sheet metal part (2), and the other of the inner wall of the lower door trim panel (1) and the outer wall of the door sheet metal part (2) abuts against the support member (3).

12. The door assembly according to claim 11, characterized in that, The number of the support members (3) is at least one, and the support members (3) are located between at least one set of two adjacent plug-in structures (13).

13. The door assembly according to claim 8, characterized in that, Also includes: A shielding member (4) is connected to the inner wall of the door sheet metal part (2). The shielding member (4) shields the plug-in structure (13) and the distance between the plug-in structure (13) and the inner wall of the outer panel (111).

14. A vehicle, characterized in that, Includes the door assembly as described in any one of claims 8-13.

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