Automobile door welding assembly and automobile

Abstract

The utility model discloses an automobile door welding assembly and an automobile, and relates to the technical field of automobile manufacturing, the automobile door welding assembly comprises an automobile door inner plate, one end of the automobile door inner plate in the Z positive direction is welded with an inner waistline reinforcing plate, and one end of the automobile door inner plate in the Z negative direction is respectively welded with a front mounting bracket and a rear mounting bracket; a first mounting hole and a second mounting hole are formed in the two ends, in the X direction, of the inner waistline reinforcing plate correspondingly, a third mounting hole and a fourth mounting hole are formed in the front mounting support and the rear mounting support correspondingly, and the first mounting hole and the third mounting hole are used for being connected with a front guide rail of the glass lifter. The second mounting hole and the fourth mounting hole are used for being connected with a rear guide rail of the window glass lifter; according to the automobile door welding assembly, the automobile door inner waistline is reinforced through the inner waistline reinforcing plate, the special mounting supports are arranged on the front portion and the rear portion respectively, the rigidity of mounting points of a glass lifting device is improved, the stability of the glass lifting process is improved, and meanwhile the structural durability of an automobile door is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile manufacturing, and more specifically relates to a door welding assembly and an automobile. Background Art

[0002] With the rapid development of the automobile industry and the continuous improvement of people's living standards, customers have higher and higher requirements for automobile products. Frameless doors, which were previously only used in professional coupe models, are gradually being used in the market for family models due to their fashion, technology and sporty characteristics.

[0003] Unlike traditional car doors, frameless doors do not have window frames, and the glass is mainly supported by the lifting device. Due to the lack of support from the window frame, the glass is prone to lateral shaking when it is raised or lowered. This will not only lead to a poor user experience, but more importantly, at the moment the door is closed, the glass will produce a large lateral impact force on the lifting device that provides support due to lateral displacement, and it will be transmitted to the mounting structure of the lifting device, which will cause structural fatigue problems of the door sheet metal and welding points. The glass lifting device is usually installed on the inner waistline reinforcement plate and the inner door panel. High mounting point stiffness is an effective way to reduce the lateral shaking of the glass. However, due to sealing requirements, frameless doors need to be designed with larger gaps at the front and rear ends of the inner door panel, which will weaken the stiffness of the inner waistline of the door, thereby exacerbating the lateral shaking of the glass when it is raised or lowered. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies in the prior art and to provide a vehicle door welding assembly and a vehicle. The vehicle door welding assembly strengthens the inner waistline of the vehicle door by means of an inner waistline reinforcement plate, and special mounting brackets are arranged at the front and rear respectively, so as to improve the mounting point rigidity of the glass lifting device, thereby increasing the stability of the glass lifting process and improving the structural durability of the vehicle door.

[0005] In order to achieve the above object, the utility model provides a vehicle door welding assembly, comprising:

[0006] The door inner panel is welded to the inner waistline reinforcement plate at one end in the positive Z direction, and is respectively welded to the front mounting bracket and the rear mounting bracket at one end in the negative Z direction. The inner waistline reinforcement plate is respectively provided with a first mounting hole and a second mounting hole at both ends along the X direction, and the front mounting bracket and the rear mounting bracket are respectively provided with a third mounting hole and a fourth mounting hole, the first mounting hole and the third mounting hole are used to connect to the front guide rail of the glass lifter, and the second mounting hole and the fourth mounting hole are used to connect to the rear guide rail of the glass lifter.

[0007] Optionally, a first notch and a second notch are respectively provided on the Z positive direction of the door inner panel, the first notch and the second notch are U-shaped, and the inner waistline reinforcement plate is flush with the first notch and the second notch.

[0008] Optionally, a hinge reinforcement plate is welded to one end of the door inner panel close to the door hinge, and the hinge reinforcement plate is connected to the inner waistline reinforcement plate via an inner waistline reinforcement plate connecting plate.

[0009] Optionally, a first lap joint surface, a second lap joint surface and a third lap joint surface are sequentially arranged in a clockwise direction at one end of the inner waistline reinforcement plate connecting plate in the positive direction, and the first lap joint surface is provided with two-layer plate welding points of the inner waistline reinforcement plate connecting plate and the inner waistline reinforcement plate, and the second lap joint surface and the third lap joint surface are respectively provided with three-layer plate welding points of the inner waistline reinforcement plate connecting plate, the inner waistline reinforcement plate and the inner panel of the door.

[0010] Optionally, a fourth lap joint surface and a fifth lap joint surface are sequentially arranged on one end of the inner waistline reinforcement plate connecting plate in the negative direction from top to bottom, and three-layer plate welding points of the inner waistline reinforcement plate connecting plate, the door inner panel and the hinge reinforcement plate are respectively arranged on the fourth lap joint surface and the fifth lap joint surface.

[0011] Optionally, the inner waistline reinforcement plate is provided with a welding edge at one end in the positive Z direction, the welding edge is rectangular, and a plurality of two-layer plate welding points of the inner waistline reinforcement plate and the door inner panel are arranged at intervals on the welding edge; the inner waistline reinforcement plate is provided with a plurality of bosses at one end in the negative Z direction, the bosses are connected to the door inner panel, and the inner waistline reinforcement plate is provided with a flange at one end in the positive X direction, and the flange is conformably fitted to the door inner panel.

[0012] Optionally, the thickness of the inner waistline reinforcement plate is not less than 1.8 mm.

[0013] Optionally, a plurality of sixth overlapping surfaces are arranged on the outer periphery of the front mounting bracket, two-layer plate welding points of the front mounting bracket and the door inner panel are arranged on the sixth overlapping surfaces, and a plurality of first reinforcing ribs are also arranged on the front mounting bracket.

[0014] Optionally, a plurality of seventh overlapping surfaces are provided on the periphery of the rear mounting bracket, two-layer plate welding points between the rear mounting bracket and the door inner panel are provided on the seventh overlapping surfaces, and a plurality of second reinforcing ribs are also provided on the rear mounting frame.

[0015] The utility model also provides a car, comprising the above-mentioned car door welding assembly.

[0016] The utility model provides a vehicle door welding assembly and a vehicle, and its beneficial effects are as follows: the vehicle door welding assembly connects the inner waistline reinforcement plate, the vehicle door inner panel and the hinge reinforcement plate as a whole by arranging an inner waistline connecting plate, thereby improving the stiffness of the inner waistline, and further improving the stiffness of the upper mounting point of the glass guide rail; by arranging a special mounting bracket, the stiffness of the lower mounting point of the glass guide rail is improved, so that the improvement of the stiffness of the glass guide rail mounting point can increase the stability of the glass lifting process, and at the same time can improve the fatigue durability of the vehicle door, and avoid the problems of welding points and sheet metal cracking.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0019] Figure 1 A structural schematic diagram of a vehicle door welding assembly according to an embodiment of the utility model is shown.

[0020] Figure 2 A schematic diagram of the inner structure of an inner door panel according to an embodiment of the utility model is shown.

[0021] Figure 3 A diagram showing the positional relationship between an inner waistline reinforcement plate and a hinge reinforcement plate according to an embodiment of the utility model is shown.

[0022] Figure 4 A schematic diagram showing the connection between the inner waistline reinforcement plate connecting plate, the waistline reinforcement plate and the hinge reinforcement plate according to an embodiment of the utility model is shown.

[0023] Figure 5 A schematic structural diagram of an inner waistline reinforcement plate connecting plate according to an embodiment of the utility model is shown.

[0024] Figure 6 A schematic structural diagram of an inner waistline reinforcement plate according to an embodiment of the utility model is shown.

[0025] Figure 7 The figure shows the positional relationship between the inner door panel and the front mounting bracket and the rear mounting bracket according to an embodiment of the utility model.

[0026] Figure 8 A schematic structural diagram of a front mounting bracket according to an embodiment of the utility model is shown.

[0027] Fig. 9A structural schematic diagram of a rear mounting bracket according to an embodiment of the utility model is shown.

[0028] Description of reference numerals:

[0029] 10. Door inner panel; 11. First notch; 12. Second notch; 20. Inner waistline reinforcement plate; 21. Reinforcement rib; 22. Overlap area; 23. Welding edge; 24. Boss; 25. Flanged edge; 26a. First mounting hole; 26b. Second mounting hole; 30. Inner waistline reinforcement plate connecting plate; 31a. First overlapping surface; 31b. Second overlapping surface; 31c. Third overlapping surface; 32a. Fourth overlapping surface; 32b. Fifth overlapping surface; 33. U-shaped Reinforcing rib; 34, welding via; 35a, first welding positioning hole; 35b, second welding positioning hole; 40, hinge reinforcement plate; 50, front guide rail; 60, rear guide rail; 70, front mounting bracket; 71, sixth overlapping surface; 72, first concave rib; 73, first reinforcing rib; 74, third mounting hole; 75, first boss; 80, front mounting bracket; 81, seventh overlapping surface; 82, second reinforcing rib; 83, fourth mounting hole; 84, second boss. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0031] The utility model provides a vehicle door welding assembly, comprising:

[0032] The inner door panel is welded to the inner waistline reinforcement plate at one end in the positive Z direction, and is respectively welded to the front mounting bracket and the rear mounting bracket at one end in the negative Z direction. The inner waistline reinforcement plate is respectively provided with a first mounting hole and a second mounting hole at both ends along the X direction, and the front mounting bracket and the rear mounting bracket are respectively provided with a third mounting hole and a fourth mounting hole. The first mounting hole and the third mounting hole are used to connect to the front guide rail of the glass lifter, and the second mounting hole and the fourth mounting hole are used to connect to the rear guide rail of the glass lifter.

[0033] Specifically, an inner waistline reinforcement plate is welded to the inner waistline of the inner door panel. In addition to improving the strength of the inner door panel, the inner waistline reinforcement plate can also serve as the upper mounting point of the glass lifter guide rail. A front mounting bracket and a rear mounting bracket are also provided at the inner bottom of the inner door panel. The two mounting brackets serve as the lower mounting points of the glass lifter guide rail. Two guide rails are provided for the glass lifter device. The front guide rail and the rear guide rail are arranged along the X direction on the inner door panel. Each guide rail is connected to the welding parts of the inner door panel at the upper end and the lower end respectively. This improves the installation strength of the guide rail, and the lifting and lowering movement of the glass is realized by the two guide rails, which can ensure the stability of the glass during the lifting process.

[0034] Optionally, a first notch and a second notch are respectively provided on the Z positive direction of the door inner panel, the first notch and the second notch are U-shaped, and the inner waistline reinforcement plate is flush with the first notch and the second notch.

[0035] Specifically, the door inner panel is the main installation and bearing structure of the door. In order to meet the sealing requirements, a first U-shaped notch and a second notch are opened at both ends of the top of the door inner panel, wherein the first notch is close to the hinge installation side, and the second notch is close to the door lock installation side; the upper end of the inner waistline reinforcement plate is arranged to have a profile matching the two notches, which will not affect the welding of the inner waistline reinforcement plate to the door inner panel and can also ensure the continuous installation of the sealing edge.

[0036] Optionally, a hinge reinforcement plate is welded to one end of the door inner panel close to the door hinge, and the hinge reinforcement plate is connected to the inner waistline reinforcement plate via an inner waistline reinforcement plate connecting plate.

[0037] Specifically, an inner waistline reinforcement plate connecting plate is also provided in the door inner panel, and the connecting plate can weld and connect the hinge reinforcement plate and the inner waistline reinforcement plate. Since the hinge reinforcement plate is welded to the hinge hole area of ​​the door inner panel, the inner waistline reinforcement plate is welded to the door inner panel through the outer peripheral edge, and there are three-layer plate welding points welded to the door inner panel on the inner waistline reinforcement plate connecting plate. In this way, the inner waistline reinforcement plate connecting plate, the inner waistline reinforcement plate, the hinge reinforcement plate and the door inner panel are connected as one, which can improve the overall strength of the door waistline area and avoid the problems of welding points and sheet metal cracking.

[0038] Optionally, a first lap joint surface, a second lap joint surface and a third lap joint surface are sequentially arranged in a clockwise direction on one end of the inner waistline reinforcement plate connecting plate in the positive direction, and a two-layer plate welding point of the inner waistline reinforcement plate connecting plate and the inner waistline reinforcement plate is arranged on the first lap joint surface, and a three-layer plate welding point of the inner waistline reinforcement plate connecting plate, the inner waistline reinforcement plate and the door inner panel is respectively arranged on the second lap joint surface and the third lap joint surface.

[0039] Optionally, a fourth lap joint surface and a fifth lap joint surface are sequentially arranged from top to bottom at one end of the inner waistline reinforcement plate connecting plate in the negative direction of the X, and three-layer plate welding points of the inner waistline reinforcement plate connecting plate, the door inner panel and the hinge reinforcement plate are respectively arranged on the fourth lap joint surface and the fifth lap joint surface.

[0040] Specifically, the inner waistline reinforcement plate connecting plate is square in shape as a whole. In order to improve its own rigidity, the surface difference of the middle area relative to the surrounding area should be increased as much as possible within the scope allowed by space. The first overlapping surface, the second overlapping surface and the third overlapping surface are arranged on the outer periphery of the rear end of the inner waistline reinforcement plate connecting plate, and the fourth overlapping surface and the fifth overlapping surface are arranged on the outer periphery of the front end, as well as U-shaped reinforcement ribs designed to improve local rigidity. A welding through hole and two welding positioning holes are also opened in the middle area of ​​the connecting plate, and bosses and reinforcement ribs are arranged around the holes to reduce the reduction in rigidity caused by the openings. According to the positions of the five overlapping surfaces, the three-layer plate welding points and the two side plate welding points are welded respectively to increase the connection degree between the inner waistline reinforcement plate connecting plate and the inner waistline reinforcement plate and the hinge reinforcement plate.

[0041] Optionally, the inner waistline reinforcement plate is provided with a welding edge at one end in the positive Z direction, the welding edge is rectangular, and a plurality of two-layer plate welding points of the inner waistline reinforcement plate and the door inner panel are arranged at intervals on the welding edge. The inner waistline reinforcement plate is provided with a plurality of bosses at one end in the negative Z direction, and the bosses are connected to the door inner panel. The inner waistline reinforcement plate is provided with a flange at one end in the positive X direction, and the flange is conformed to the door inner panel.

[0042] Specifically, a rectangular welding edge is provided on the upper part of the inner waistline reinforcement plate, which is flush with the upper edge of the door inner panel and is connected through multiple welding points, and the spacing between adjacent welding points is not more than 60 mm; intermittently distributed bosses are arranged on the lower part of the inner waistline reinforcement plate, and the bosses are connected to the door inner panel through welding points; in addition, the rear part of the inner waistline reinforcement plate is flush with the second notch of the door inner panel, and a flange that follows the shape of the door inner panel is arranged on the rear part of the inner waistline reinforcement plate, and multiple welding points are set at the joint between the flange and the door inner panel.

[0043] A circular hole is provided in the middle area of ​​the inner waistline reinforcement plate, which is the upper mounting point of the front and rear guide rails of the glass lifter. In addition, in order to improve the local stiffness of the mounting point here, bosses and reinforcing ribs are provided around the circular hole.

[0044] Optionally, the thickness of the inner waistline reinforcement plate is not less than 1.8 mm.

[0045] Specifically, the thickness of the inner waistline reinforcement plate should be above 1.8 mm, and the yield strength of the material should be greater than 400 MPa, thereby further ensuring that the force-transmitting structural component has good stiffness and strength performance during use and meeting the performance requirements for improving the stiffness of the inner waistline.

[0046] Optionally, a plurality of sixth overlapping surfaces are arranged on the periphery of the front mounting bracket, two-layer plate welding points between the front mounting bracket and the door inner panel are arranged on the sixth overlapping surfaces, and a plurality of first reinforcing ribs are also arranged on the front mounting bracket.

[0047] Specifically, a plurality of sixth overlapping surfaces are arranged on the outer periphery of the front mounting bracket, and are welded together with the door inner panel through the sixth overlapping surfaces, so that the bracket has a good rigidity foundation. In addition, first reinforcing ribs of different forms are arranged on the front mounting bracket, and the first reinforcing ribs include elliptical concave ribs and I-shaped reinforcing ribs, and bosses are arranged around the third mounting hole, which are all helpful to improve the rigidity of the front mounting bracket, and thereby improve the rigidity of the lower mounting point of the front guide rail.

[0048] Optionally, a plurality of seventh overlapping surfaces are provided on the periphery of the rear mounting bracket, two-layer plate welding points between the rear mounting bracket and the door inner panel are provided on the seventh overlapping surfaces, and a plurality of second reinforcing ribs are also provided on the rear mounting frame.

[0049] Specifically, a plurality of seventh overlapping surfaces are arranged on the periphery of the rear mounting bracket, which are welded together with the inner door panel through the seventh overlapping surfaces to ensure that the bracket has a good rigidity foundation. A second reinforcing rib is also provided on the rear mounting bracket, the second reinforcing rib includes a "J"-shaped reinforcing rib, and a boss is arranged around the fourth mounting hole, which helps to improve the rigidity of the rear mounting bracket and thereby improve the rigidity of the lower mounting point of the rear guide rail.

[0050] The utility model also provides a car, comprising the above-mentioned car door welding assembly.

[0051] Example

[0052] like Figures 1 to 9 As shown, the utility model provides a vehicle door welding assembly, comprising:

[0053] The door inner panel 10 is welded to the inner waistline reinforcement plate 20 at one end in the positive Z direction, and is welded to the front mounting bracket 70 and the rear mounting bracket 80 at one end in the negative Z direction, respectively. The inner waistline reinforcement plate 20 is provided with a first mounting hole 26a and a second mounting hole 26b at both ends along the X direction, respectively, and the front mounting bracket 70 and the rear mounting bracket 80 are provided with a third mounting hole 74 and a fourth mounting hole 83, respectively. The first mounting hole 26a and the third mounting hole 74 are used to connect with the front guide rail 50 of the glass lifter, and the second mounting hole 26b and the fourth mounting hole 83 are used to connect with the rear guide rail 60 of the glass lifter.

[0054] In this embodiment, a first notch 11 and a second notch 12 are respectively provided in the Z positive direction of the door inner panel 10 . The first notch 11 and the second notch 12 are U-shaped, and the inner waistline reinforcement plate 20 is flush with the first notch 11 and the second notch 12 .

[0055] In this embodiment, a hinge reinforcement plate 40 is welded to one end of the door inner panel 10 close to the door hinge, and the hinge reinforcement plate 40 is connected to the overlapping area 22 of the inner waistline reinforcement plate 20 through the inner waistline reinforcement plate connecting plate 30 .

[0056] In this embodiment, a first lap surface 31a, a third lap surface 31c and a second lap surface 31b are sequentially arranged in a clockwise direction on one end of the inner waistline reinforcement plate connecting plate 30 in the positive direction of X, and the first lap surface 31a is provided with two-layer plate welding points of the inner waistline reinforcement plate connecting plate 30 and the inner waistline reinforcement plate 20, and the second lap surface 31b and the third lap surface 31c are respectively provided with three-layer plate welding points of the inner waistline reinforcement plate connecting plate 30, the inner waistline reinforcement plate 20 and the door inner panel 10.

[0057] In this embodiment, a fourth lap surface 32a and a fifth lap surface 32b are sequentially arranged on one end of the inner waistline reinforcement plate connecting plate 30 in the negative direction of X from top to bottom, and three-layer plate welding points of the inner waistline reinforcement plate connecting plate 30, the door inner panel 10 and the hinge reinforcement plate 40 are respectively arranged on the fourth lap surface 32a and the fifth lap surface 32b; a U-shaped reinforcement rib 33 is also arranged on the inner waistline reinforcement plate connecting plate 30, and a welding through hole 34 and a first welding positioning hole 35a and a second welding positioning hole 35b are opened in the middle.

[0058] In this embodiment, the inner waistline reinforcement plate 20 is provided with a welding edge 23 at one end in the positive direction of Z, and the welding edge 23 is rectangular. A plurality of two-layer plate welding points of the inner waistline reinforcement plate 20 and the door inner panel 10 are arranged at intervals on the welding edge 23. A plurality of criss-crossing reinforcing ribs 21 are arranged in the middle part of the inner waistline reinforcement plate 20. A plurality of bosses 24 are provided at one end in the negative direction of Z, and the bosses 24 are connected to the door inner panel 10. A flange 25 is provided at one end in the positive direction of X, and the flange 25 is conformed to the shape of the door inner panel 10.

[0059] In this embodiment, the thickness of the inner waistline reinforcement plate 20 is not less than 1.8 mm.

[0060] In this embodiment, six sixth overlapping surfaces 71 are arranged on the outer periphery of the front mounting bracket 70, and two-layer plate welding points between the front mounting bracket 70 and the door inner panel 10 are arranged on the sixth overlapping surfaces 71. The front mounting bracket 70 is also provided with an elliptical first concave rib 72 and a first I-shaped reinforcing rib 73, and a first boss 75 is arranged around the third mounting hole 74.

[0061] In this embodiment, five seventh lap joints 81 are provided on the outer periphery of the rear mounting bracket 80, and two-layer plate welding points between the rear mounting bracket 80 and the door inner panel 10 are provided on the seventh lap joints 81. A second "J"-shaped reinforcing rib 82 is also provided on the rear mounting bracket 80, and a second boss 84 is provided around the fourth mounting hole 83.

[0062] The utility model also provides a car, comprising the above-mentioned car door welding assembly.

[0063] In summary, an inner waistline reinforcement 20 is provided at the waistline position of the door inner panel 10, and the inner waistline reinforcement 20 is welded to the hinge reinforcement plate 40 through the inner waistline reinforcement plate connecting plate 30. In this way, in addition to the welding connection between the inner waistline reinforcement 20 and the door inner panel 10, the inner waistline reinforcement 20, the inner waistline reinforcement plate connecting plate 30, the hinge reinforcement plate 40 and the door inner panel 10 are connected to form an integrated structure, thereby increasing the strength of the waistline position of the door inner panel 10. In addition, a front mounting bracket 70 and a rear mounting bracket 80 are provided on the door inner panel 10, so that the front guide rail 50 and the rear guide rail 60 can be respectively installed in the upper and lower mounting holes, thereby improving the fixing strength of the glass lifter and ensuring the normal lifting and lowering operation of the glass.

[0064] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A vehicle door welding assembly, characterized in that: include: The door inner panel is welded to the inner waistline reinforcement plate at one end in the positive Z direction, and is respectively welded to the front mounting bracket and the rear mounting bracket at one end in the negative Z direction. The inner waistline reinforcement plate is respectively provided with a first mounting hole and a second mounting hole at both ends along the X direction, and the front mounting bracket and the rear mounting bracket are respectively provided with a third mounting hole and a fourth mounting hole, the first mounting hole and the third mounting hole are used to connect to the front guide rail of the glass lifter, and the second mounting hole and the fourth mounting hole are used to connect to the rear guide rail of the glass lifter.

2. The vehicle door welding assembly according to claim 1, characterized in that: The door inner panel is provided with a first notch and a second notch in the Z positive direction, respectively. The first notch and the second notch are U-shaped, and the inner waistline reinforcement plate is flush with the first notch and the second notch.

3. The vehicle door welding assembly according to claim 1, characterized in that: A hinge reinforcement plate is welded to one end of the door inner panel close to the door hinge, and the hinge reinforcement plate is connected to the inner waistline reinforcement plate through an inner waistline reinforcement plate connecting plate.

4. The vehicle door welding assembly according to claim 3, characterized in that: A first lap joint surface, a second lap joint surface and a third lap joint surface are sequentially arranged in a clockwise direction on one end of the inner waistline reinforcement plate connecting plate in the positive direction. The first lap joint surface is provided with two-layer plate welding points of the inner waistline reinforcement plate connecting plate and the inner waistline reinforcement plate, and the second lap joint surface and the third lap joint surface are respectively provided with three-layer plate welding points of the inner waistline reinforcement plate connecting plate, the inner waistline reinforcement plate and the inner door panel.

5. The vehicle door welding assembly according to claim 3, characterized in that: A fourth lap joint surface and a fifth lap joint surface are sequentially arranged on one end of the inner waistline reinforcement plate connecting plate in the negative direction from top to bottom, and three-layer plate welding points of the inner waistline reinforcement plate connecting plate, the door inner panel and the hinge reinforcement plate are respectively arranged on the fourth lap joint surface and the fifth lap joint surface.

6. The vehicle door welding assembly according to claim 1, characterized in that: The inner waistline reinforcement plate is provided with a welding edge at one end in the positive Z direction, and the welding edge is rectangular. A plurality of two-layer plate welding points of the inner waistline reinforcement plate and the door inner panel are arranged at intervals on the welding edge. The inner waistline reinforcement plate is provided with a plurality of bosses at one end in the negative Z direction, and the bosses are connected to the door inner panel. The inner waistline reinforcement plate is provided with a flange at one end in the positive X direction, and the flange is conformably fitted to the door inner panel.

7. The vehicle door welding assembly according to claim 1, characterized in that: The thickness of the inner waistline reinforcement plate is not less than 1.8 mm.

8. The vehicle door welding assembly according to claim 1, characterized in that: A plurality of sixth overlapping surfaces are arranged on the outer periphery of the front mounting bracket, two-layer plate welding points of the front mounting bracket and the door inner panel are arranged on the sixth overlapping surfaces, and a plurality of first reinforcing ribs are also arranged on the front mounting bracket.

9. The vehicle door welding assembly according to claim 1, characterized in that: A plurality of seventh overlapping surfaces are arranged on the outer periphery of the rear mounting bracket, and two-layer plate welding points of the rear mounting bracket and the door inner panel are arranged on the seventh overlapping surfaces. A plurality of second reinforcing ribs are also arranged on the rear mounting frame.

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

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