Door assembly and vehicle having the same

Abstract

The application discloses a vehicle door assembly and a vehicle with the same, the vehicle door assembly comprising: a door inner panel; a window frame provided on the upper side of the door inner panel, the window frame comprising a window frame body and a connecting plate section connected to the lower side of the window frame body and extending downward, the connecting plate section having a first connecting part extending along the front and back and a second connecting part extending along the left and right, the first connecting part being welded to the door inner panel, and the second connecting part being welded to the door inner panel. According to the vehicle door assembly, the first connecting part extending along the front and back and the second connecting part extending along the left and right are arranged on the connecting plate section, the first connecting part is welded to the door inner panel, and the second connecting part is welded to the door inner panel, so that the overall rigidity of the door inner panel after being welded to the window frame is improved, and the anti-deformation and anti-rust corrosion capability of the door inner panel and the window frame is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a door assembly and a vehicle having the same. Background Technology

[0002] As residents' income levels rise, vehicles have become an essential household appliance as a means of transportation. Currently, car doors typically come in two structural forms: one-piece and two-piece. Because two-piece doors have higher material utilization and better manufacturing economy, they have gradually become the most common car door structure.

[0003] Split-type car doors mainly consist of a window frame structure and a main door structure. During manufacturing, the window frame structure and the main door structure need to be welded into a whole, and then the door is painted as a whole before being assembled onto the car body. However, when assembling the door onto the car body, the dimensional accuracy of the split-type door window frame is difficult to control, which can easily lead to gaps and surface differences between the door and the body (B / C pillars) after assembly. This requires adjusting the door, which often involves relatively rough pushing and pulling. This can cause significant deformation in the weld area at the overlapping edge of the window frame and the inner panel, leading to paint cracking and making the welded area more prone to corrosion. Summary of the Invention

[0004] This invention is based on the inventors' findings regarding the following facts and problems:

[0005] The existing split-type car door (front door B-pillar / rear door C-pillar) has a short overlap length between the window frame and the door panel, and the overlap is spot welded in the Y direction. When adjusting the door, the operator applies a Y-force to the door, in the same direction as the weld. Due to the poor resistance to peeling force and deformation of the weld, the sheet metal around the weld is prone to yielding and deformation, causing the window frame and inner panel to move in the Y direction, resulting in greater stress at the overlap edge of the window frame and inner panel. Arc welding is usually used at the overlap edge of the window frame and door panel. Because the sheet metal is thinner at this point and the total arc weld length is shorter, the rigidity of the weld area is the weakest. Furthermore, because arc welding produces weld beads, the height of the arc weld beads must be ground down to less than 0.5mm to meet the requirements of trim panel assembly and appearance. This results in poor paint adhesion and corrosion resistance in the weld oxidation zone and at the ground-off corners of the weld beads, making the paint prone to cracking and rust.

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a door assembly that can improve the overall rigidity of a split door and window frame, thereby enhancing the door and window frame's resistance to deformation, paint cracking, and corrosion.

[0007] The present invention also proposes a vehicle having the above-described door assembly.

[0008] According to a first aspect of the present invention, a door assembly includes an inner door panel and a window frame disposed on the upper side of the inner door panel. The window frame includes a window frame body and a connecting plate segment connected to the lower side of the window frame body and extending downward. The connecting plate segment has a first connecting portion extending longitudinally and a second connecting portion extending laterally. The first connecting portion is welded to the inner door panel, and the second connecting portion is welded to the inner door panel.

[0009] According to the door assembly of the present invention, by providing a first connecting portion extending in the front and rear and a second connecting portion extending in the left and right directions in the connecting plate section, and welding the first connecting portion to the inner door panel and the second connecting portion to the inner door panel, the overall rigidity of the inner door panel and the window frame after welding is improved, thereby enhancing the resistance of the inner door panel and the window frame to deformation, paint cracking and corrosion.

[0010] In addition, the door assembly of this embodiment also has the following additional technical features:

[0011] In some embodiments of the present invention, the first connecting portion is connected to the inner panel of the door by at least one first weld point. When there are multiple first weld points, the multiple first weld points are arranged at intervals in the vertical direction.

[0012] In some embodiments of the present invention, the second connecting portion is connected to the inner panel of the door by at least one second welding point. When there are multiple second welding points, the multiple second welding points are arranged at intervals in the vertical direction.

[0013] In some embodiments of the present invention, the window frame further includes an extension plate segment connected to the lower end of the connecting plate segment, and the door assembly further includes a latch reinforcement plate disposed on the inner panel of the door, and the extension plate segment extends downward to overlap and connect with the latch reinforcement plate.

[0014] In one embodiment of the present invention, the extension plate segment includes a first overlapping portion extending front-to-back and a second overlapping portion extending left-to-right. The first overlapping portion is welded to the latch reinforcement plate and the inner door panel, and the second overlapping portion is welded to the latch reinforcement plate and the inner door panel.

[0015] In some examples of the present invention, the first overlapping portion, the latch reinforcement plate and the inner door panel are connected by at least one third weld point;

[0016] The second overlapping part, the latch reinforcement plate and the inner door panel are connected by at least one fourth welding point.

[0017] In some embodiments of the present invention, a fifth welding point is provided between the connecting plate segment and the inner panel of the door, and the distance between the fifth welding point and the upper edge of the inner panel of the door is less than 30mm.

[0018] In one embodiment of the present invention, at the upper edge of the inner door panel, the gap between the inner door panel and the connecting plate segment is less than or equal to 0.3 mm.

[0019] In some examples of the present invention, the upper edge of the inner door panel is connected to the connecting plate segment by a laser weld, the length of which is greater than or equal to 40 mm.

[0020] The vehicle according to the second aspect of the invention includes a door assembly according to the first aspect of the invention.

[0021] According to the vehicle of the present invention, by providing the door assembly of the first aspect described above, the overall rigidity of the inner door panel and the window frame after welding is improved, thereby enhancing the resistance of the inner door panel and the window frame to deformation, paint cracking, and corrosion.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a door assembly according to an embodiment of the present invention;

[0024] Figure 2 This is an exploded view of the door assembly according to an embodiment of the present invention;

[0025] Figure 3 yes Figure 1 The diagram shows the connection relationship between the inner door panel and the window frame.

[0026] Figure 4 yes Figure 1 Another angle diagram illustrating the connection between the inner door panel and the window frame;

[0027] Figure 5 yes Figure 4 The enlarged view of the inner door panel and window frame shown;

[0028] Figure 6 yes Figure 5 Another schematic diagram of the inner door panel and window frame shown.

[0029] Figure label:

[0030] 10. Door assembly; 11. Door inner panel;

[0031] 12. Window frame; 121. Window frame body; 122. Connecting plate segment; 1221. First connecting part; 1222. Second connecting part; 123. Extension plate segment; 1231. First overlapping part; 1232. Second overlapping part;

[0032] 13. Locking buckle reinforcement plate; 14. Door outer panel;

[0033] 101. First weld point; 102. Second weld point; 103. Third weld point; 104. Fourth weld point; 105. Fifth weld point; 106. Sixth weld point; 107. Laser weld seam; 108. Clamping area. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] The following is for reference. Figures 1-6 A door assembly 10 according to a first aspect embodiment of the present invention is described.

[0036] like Figures 1-3 As shown, according to a first aspect embodiment of the present invention, a door assembly 10 includes: an inner door panel 11 and a window frame 12. Specifically, the window frame 12 is disposed on the upper side of the inner door panel 11 to form an air circulation channel between the inside and outside of the vehicle. The window frame 12 includes a window frame body 121 and a connecting plate segment 122 connected to the lower side of the window frame body 121 and extending downward. The connecting plate segment 122 has a front-to-back (e.g., Figure 1 The first connecting portion 1221 extends in the front-back direction (as shown) and along the left-right (e.g.) Figure 1 The second connecting portion 1222 extends in the left-right direction (as shown). The first connecting portion 1221 is welded to the inner door panel 11, and the second connecting portion 1222 is welded to the inner door panel 11. That is, when welding the inner door panel 11 to the window frame 12, in the X direction of the vehicle (e.g., as shown in the left-right direction), the second connecting portion 1222 extends in the left-right direction (as shown in the left-right direction). Figure 1 (as shown in the front-back direction) and Y direction (e.g.) Figure 1 Welding is performed on the inner door panel 11 and the window frame 12 in the left and right directions shown.

[0037] During the door adjustment process, personnel apply a Y-axis force to the door to ensure the clearance between the door assembly 10 and the vehicle body meets requirements. At this time, the Y-axis weld points are in the same direction as the applied force and are subject to peeling force, resulting in poor resistance to deformation. The sheet metal around the Y-axis weld points is prone to yielding and deformation. Conversely, the X-axis weld points are perpendicular to the applied force and are subject to shearing force, which is approximately five times the peeling force. Therefore, the X-axis weld points have strong resistance to deformation, and the sheet metal around them is less prone to yielding and deformation. Here, peeling force can refer to the force required for one of two overlapping plates in the Y-direction to separate from the other plate in the Y-direction when subjected to a Y-axis force. Shearing force can refer to the force required for one of two overlapping plates in the X-direction to separate from the other plate in the X-direction when subjected to a Y-axis force.

[0038] In this embodiment, the door assembly 10 is provided with a connecting plate segment 122 and a second connecting part 1222 extending in the left and right directions. The second connecting part 1222 is welded to the inner door panel 11. When the window frame 12 and the inner door panel 11 are adjusted or pushed in the Y direction, the weld between the second connecting part 1222 and the inner door panel 11 is subjected to shear force, which is about five times the peeling force. This increases the connection strength and deformation resistance between the inner door panel 11 and the window frame 12, improves the overall rigidity of the inner door panel 11 and the window frame 12 after welding, and makes it less likely for paint cracking and rust to occur at the connection between the inner door panel 11 and the window frame 12.

[0039] According to an embodiment of the present invention, the door assembly 10 is provided with a first connecting portion 1221 extending in the front and rear and a second connecting portion 1222 extending in the left and right of the connecting plate segment 122. The first connecting portion 1221 is welded to the inner door panel 11 and the second connecting portion 1222 is welded to the inner door panel 11. This improves the overall rigidity of the inner door panel 11 and the window frame 12 after welding, thereby enhancing the resistance of the inner door panel 11 and the window frame 12 to deformation, paint cracking and corrosion.

[0040] In some embodiments of the present invention, such as Figure 3As shown, the first connecting part 1221 and the inner door panel 11 can be connected by at least one first welding point 101. When there are multiple first welding points 101, they are arranged at intervals in the vertical direction. That is, when the first connecting part 1221 is welded to the inner door panel 11, one, two, three or more welding points can be provided, which can be set according to actual needs. By setting at least one first welding point 101 to weld the first connecting part 1221 to the inner door panel 11, the window frame 12 and the inner door panel 11 can be fixed in the Y direction. When multiple first welding points 101 are provided, the connection strength between the window frame 12 and the inner door panel 11 can be increased. When multiple first welding points 101 are arranged at intervals in the vertical direction, the fixation stability of the window frame 12 in the vertical direction can be improved. When adjusting the door, the window frame 12 and the door panel can undergo uniform slight deformation, avoiding stress concentration at the overlapping edge of the window frame 12 and the inner door panel 11.

[0041] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the second connecting part 1222 and the inner door panel 11 can be connected by at least one second welding point 102. When there are multiple second welding points 102, they are arranged at intervals in the vertical direction. That is, when the second connecting part 1222 is welded to the inner door panel 11, one, two, three or more welding points can be provided, which can be set according to actual needs. By providing at least one second welding point 102 to weld the second connecting part 1222 to the inner door panel 11, the window frame 12 and the inner door panel 11 can be fixed in the X direction. When adjusting the door, the shear force connecting the window frame 12 and the inner door panel 11 can be increased, thereby increasing the deformation resistance and paint cracking and corrosion resistance of the inner door panel 11 and the window frame 12. When multiple second welding points 102 are provided, the connection strength between the window frame 12 and the inner door panel 11 can be increased. When multiple second welding points 102 are arranged at intervals in the vertical direction, the fixation stability of the window frame 12 in the vertical direction can be improved. When adjusting the door, the window frame 12 and the door panel can undergo uniform micro-deformation, avoiding stress concentration at the overlapping edge of the window frame 12 and the inner door panel 11.

[0042] In some embodiments of the present invention, such as Figure 1 As shown, the door assembly 10 may also include an outer door panel 14, a window frame 12 welded to an inner door panel 11, and then the window frame 12 and the inner door panel 11 form a welded assembly. The outer door panel 14 and the window frame 12 are then joined together with the inner door panel 11 through an edge-wrapping process to obtain a complete door assembly 10. Thus, the outer door panel 14 can cover and conceal the sheet metal structure of the inner door panel 11, making the door assembly 10 look neat and tidy after it is assembled with the car body.

[0043] In some embodiments of the present invention, such as Figure 3As shown, the window frame 12 may also include an extension plate segment 123, which is connected to the lower end of the connecting plate segment 122. The door assembly 10 also includes a latch reinforcement plate 13, which is disposed on the inner door panel 11. The extension plate segment 123 extends downward to overlap with the latch reinforcement plate 13. Thus, the window frame 12 and the latch reinforcement plate 13 of the door form an overlapping area, thereby connecting the window frame 12 and the latch reinforcement plate 13 into a single unit. This extends the vertical overlap area of ​​the window frame 12 and the inner door panel 11 to the lower edge of the latch reinforcement plate 13, significantly increasing the overlap length and further improving the overall structural strength of the window frame 12 and the door. Simultaneously, the latch reinforcement plate 13 can also share some of the stress when adjusting the door, reducing the stress on individual weld points. For example... Figure 3 As shown, the extension plate 123 of the window frame 12 overlaps with the latch reinforcement plate 13, and at this time the effective overlap length between the window frame 12 and the inner door panel 11 can reach about 320mm.

[0044] In one embodiment of the present invention, such as Figure 3 As shown, the extension plate segment 123 may include a first overlapping portion 1231 extending front-to-back and a second overlapping portion 1232 extending left-to-right. The first overlapping portion 1231 is welded to the latching reinforcement plate 13 and the inner door panel 11, and the second overlapping portion 1232 is welded to the latching reinforcement plate 13 and the inner door panel 11. Specifically, the latching reinforcement plate 13 is first welded to the first overlapping portion 1231, and then the first overlapping portion 1231 is welded to the inner door panel 11. The latching reinforcement plate 13 is first welded to the second overlapping portion 1232, and then the second overlapping portion 1232 is welded to the inner door panel 11. In other words, the first overlapping part 1231 and the second overlapping part 1232 of the extension plate segment 123 of the window frame 12 at the latch reinforcement plate 13 form an L-shaped vertical overlapping surface structure in the horizontal direction, and are spot welded together in the X and Y directions respectively. This effectively increases the anisotropy of the structure and improves the structural rigidity of the window frame 12 and the inner panel 11 of the door.

[0045] In some examples of the present invention, such as Figure 3 As shown, the first overlapping part 1231, the latch reinforcing plate 13, and the inner door panel 11 can be connected by at least one third welding point 103. That is, when the first connecting part 1221 is welded to the inner door panel 11, one, two, three, or more welding points can be provided, which can be set according to actual needs. By providing at least one third welding point 103 to weld the first overlapping part 1231 to the latch reinforcing plate 13 and the inner door panel 11, the window frame 12 can be fixed to the latch reinforcing plate 13 and the inner door panel 11 in the Y direction, making the overall structural strength of the window frame 12 and the inner door panel 11 higher. When adjusting the door, the window frame 12 and the door panel can undergo uniform and slight deformation, avoiding stress concentration at the overlapping edge of the window frame 12 and the inner door panel 11.

[0046] In some examples of the present invention, such as Figure 3 As shown, the second overlapping portion 1232, the latching reinforcement plate 13, and the inner door panel 11 can be connected by at least one fourth welding point 104. That is, when welding the second overlapping portion 1232, the latching reinforcement plate 13, and the inner door panel 11, one, two, three, or more welding points can be provided, depending on actual needs. Providing at least one fourth welding point 104 to weld the second overlapping portion 1232, the latching reinforcement plate 13, and the inner door panel 11 increases the shear force connecting the window frame 12, the latching reinforcement plate 13, and the inner door panel 11, thereby increasing the resistance to deformation and paint cracking / rust between the inner door panel 11 and the window frame 12.

[0047] In some examples of the present invention, such as Figure 3 As shown, the fourth weld point 104 may include multiple fourth weld points 104, which are arranged at intervals along the vertical direction. Therefore, by setting multiple fourth weld points 104 at intervals in the vertical direction, the stability of the window frame 12 in the vertical direction can be improved. During door adjustment, the window frame 12 door panel can undergo uniform and slight deformation, avoiding stress concentration at the overlapping edge of the window frame 12 and the inner door panel 11. For example, there may be two, three, four, or more fourth weld points 104.

[0048] In some embodiments of the present invention, such as Figure 5 and Figure 6 As shown, a fifth weld point 105 can be provided between the connecting plate segment 122 and the inner door panel 11. The distance between the fifth weld point 105 and the upper edge of the inner door panel 11 is less than 30mm. Therefore, when welding and assembling the window frame 12 and the inner door panel 11, a clamp can be used to first clamp the overlapping edges of the window frame 12 and the inner panel, and then the fifth weld point 105 is formed. When the clamp is released, the relative position of the inner door panel 11 and the window frame 12 is constrained by the fifth weld point 105. This prevents the gap between the overlapping edges of the connecting plate segment 122 and the upper edge of the inner door panel 11 from increasing due to the inner panel's rebound, facilitating subsequent assembly. For example, the distance between the fifth weld point 105 and the upper edge of the inner door panel 11 can be set to 25mm, 20mm, 15mm, etc.

[0049] In one embodiment of the present invention, such as Figure 5 and Figure 6 As shown, a clamping area 108 can be provided at the upper edge of the inner door panel 11 where it overlaps with the window frame 12. When clamping the inner door panel 11 and the window frame 12, the clamp is clamped and fixed in the clamping area 108, which can conveniently clamp the upper edge of the inner door panel 11 where it overlaps with the window frame 12.

[0050] In one embodiment of the present invention, such asFigure 6 As shown, at the upper edge of the inner door panel 11, the gap between the inner door panel 11 and the connecting plate segment 122 can be less than or equal to 0.3 mm. Therefore, controlling the gap to less than 0.3 mm provides a prerequisite for using laser welding technology at the overlapping edge of the connecting plate segment 122 between the inner door panel 11 and the window frame 12. For example, the gap between the door and the connecting plate segment 122 can be controlled to 0.2 mm, 0.1 mm, etc.

[0051] In some examples of the present invention, such as Figure 6 As shown, the upper edge of the inner door panel 11 and the connecting plate segment 122 can be connected by a laser weld 107, with a weld length greater than or equal to 40mm. The inner door panel 11 and the connecting plate segment 122 can be connected by laser welding. Due to the use of filler wire laser welding with a small heat input, this welding process is less likely to burn through the sheet metal and allows for arbitrary design of the weld length. Therefore, the weld length at the overlapping edge of the connecting plate segment 122 of the inner door panel 11 and the window frame 12 can reach its maximum value, thereby significantly improving the rigidity of the window frame 12 and the inner door panel 11 at the overlapping edge. At the same time, it avoids the stress concentration problem caused by the original arc welding process, significantly reduces sheet metal deformation in the weld area, and solves the problem of paint cracking when adjusting the door. Meanwhile, because the laser weld seam 107 is small and has a smooth boundary with minimal protrusion, it does not require grinding. The oxide zone at the weld root is easily polished away, resulting in good paint adhesion and corrosion resistance in the area of ​​the laser weld seam 107. This further enhances the paint cracking and corrosion resistance of the door assembly 10. Preferably, the maximum weld length at the overlapping edge of the connecting plate segment 122 of the window frame 12 and the inner door panel 11 can be 70mm. For example, the weld length can be 40mm, 50mm, 60mm, 70mm, etc., and the weld length can be designed according to actual needs.

[0052] The following is for reference. Figures 1-6 A vehicle according to an embodiment of the second aspect of the present invention is described.

[0053] like Figures 1-6 As shown, a vehicle according to an embodiment of the present invention includes a door assembly 10 according to a first aspect embodiment of the present invention. Other configurations and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0054] According to the vehicle of the present invention, by providing the door assembly 10 of the first aspect embodiment described above, the overall rigidity of the inner door panel 11 and the window frame 12 after welding is improved, thereby enhancing the resistance of the inner door panel 11 and the window frame 12 to deformation, paint cracking and corrosion.

[0055] The following is based on Figures 1-6 A vehicle according to a specific embodiment of the present invention is described.

[0056] like Figures 1-6 As shown, the vehicle includes a door assembly 10, which is part of the vehicle body, and occupants can enter and exit the vehicle by opening the door assembly 10.

[0057] The door assembly 10 includes an inner door panel 11, an outer door panel 14, a window frame 12, and a latch reinforcement plate 13. The window frame 12 is located on the upper side of the inner door panel 11 and includes a window frame body 121, a connecting plate segment 122, and an extension plate segment 123. The outer door panel 14 is edge-connected to the inner door panel 11 and the window frame 12 in the Y direction. The connecting plate segment 122 is connected to the lower side of the window frame body 121 and extends downward. The connecting plate segment 122 has a first connecting portion 1221 extending front-rear and a second connecting portion 1222 extending left-right. The first connecting portion 1221 is spot-welded to the inner door panel 11, with one first welding point 101, which is a Y-direction welding point. The second connecting portion 1222 is spot-welded to the inner door panel 11, with three second welding points 102, which are X-direction welding points. The latching reinforcement plate 13 is fixed to the inner door panel 11. An extension plate segment 123 is connected to the lower end of the connecting plate segment 122 and extends downwards to the latching reinforcement plate 13. The extension plate overlaps with the latching reinforcement plate 13, and includes a first overlapping portion 1231 and a second overlapping portion 1232. The first overlapping portion 1231 extends front-to-back, and the second overlapping portion 1232 extends left-to-right. The first overlapping portion 1231 and the second overlapping portion 1232 form an L-shaped vertical overlapping surface in the horizontal direction. The first overlapping portion 1231, the latching reinforcement plate 13, and the inner door panel 11 are spot-welded together, with the weld point designated as the third weld point 103. There is one third weld point 103, which is a Y-direction weld point. The second overlapping portion 1232, the latching reinforcement plate 13, and the inner door panel 11 are also spot-welded together, with the weld point designated as the fourth weld point 104. There is one fourth weld point 104, which is an X-direction weld point. Two X-direction weld points, designated as the sixth weld point 106, are provided at intervals below the area where the latch reinforcement plate 13 overlaps with the second overlapping portion 1232. A fifth weld point 105 is provided between the connecting plate segment 122 and the inner door panel 11. The distance between the fifth weld point 105 and the upper edge of the inner door panel 11 is set to 20mm. At the upper edge of the inner door panel 11, the gap between the inner door panel 11 and the connecting plate segment 122 is controlled within 0.3mm. The upper edge of the inner door panel 11 and the connecting plate segment 122 are welded by laser welding, and the total length of the weld seam is greater than or equal to 40mm.

[0058] When welding and assembling the door assembly 10, first adjust and fix the relative positions of the window frame 12 and the inner door panel 11. Fix the clamp in the clamping area 108 and clamp the overlapping edges of the window frame 12 and the inner door panel 11 with the clamp, so that the gap between the inner door panel 11 and the connecting plate segment 122 at the upper edge of the inner door panel 11 is kept within 0.3mm. Spot weld the inner door panel 11 and the connecting plate segment 122 at the fifth welding point 105. Then release the clamp and weld the inner door panel 11 and the connecting plate segment 122 in sequence at the first welding point 101 and the second welding point 102. The connecting plate segment 122 and the extension plate segment 123 of the window frame 12 are spot welded to the inner door panel 11 and the latch reinforcement plate 13 at the third welding point 103, the fourth welding point 104 and the sixth welding point 106. Then, the upper edge of the inner door panel 11 is welded to the connecting plate segment 122 by laser welding. The length of the weld is designed according to actual needs, so that the window frame 12 and the inner door panel 11 are welded together. Finally, the welded assembly formed by the window frame 12 and the inner door panel 11 is edged with the outer door panel 14 to obtain the complete door assembly 10.

[0059] When assembling the door assembly 10 onto the vehicle body for door adjustment, the operator applies a Y-axis force to the door assembly 10, and applies force individually to the window frame 12 or the inner door panel 11. At this time, since the second weld point 102, the fourth weld point 104, and the sixth weld point 106 are X-axis weld points, they are subjected to shear force, thus having stronger resistance to deformation. Meanwhile, the window frame 12 is provided with a connecting plate segment 122 and an extension plate segment 123, and the first overlapping portion 1231 and the second overlapping portion 1232 of the extension plate segment 123 form an L-shaped vertical overlapping surface, and there is an overlapping area with the latch reinforcement plate 13. This greatly increases the connection strength between the window frame 12 and the inner door panel 11. This effectively increases the anisotropy of the structure and improves its rigidity, greatly increasing the overall structural strength of the door assembly 10. Furthermore, the upper edge of the inner door panel 11 is welded to the connecting plate segment 122 using laser welding, increasing the length of the weld. This not only improves the rigidity at this location but also avoids stress concentration. Because the laser weld 107 is small and has a smooth boundary with minimal protrusion, grinding is not required. The oxide zone at the weld root is easily polished and removed. Therefore, the laser weld 107 area of ​​this structure has good paint adhesion and corrosion resistance, further enhancing its resistance to paint cracking and corrosion. This significantly reduces sheet metal deformation in the weld area and prevents paint cracking.

[0060] According to the door assembly 10 of the present invention, by providing a first connecting portion 1221 extending in the front and rear and a second connecting portion 1222 extending in the left and right of the connecting plate segment 122, and welding the first connecting portion 1221 to the inner door panel 11 and the second connecting portion 1222 to the inner door panel 11, the overall rigidity of the inner door panel 11 after welding with the window frame 12 is improved, thereby enhancing the resistance of the inner door panel 11 and the window frame 12 to deformation, paint cracking and corrosion.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A door assembly, characterized in that, include: Inner door panel; A window frame is provided on the upper side of the inner panel of the car door. The window frame includes a window frame body and a connecting plate segment extending downward from the lower side of the window frame body. The connecting plate segment has a first connecting part extending forward and backward and a second connecting part extending left and right. The first connecting part is welded to the inner panel of the car door, and the second connecting part is welded to the inner panel of the car door. The second connecting part and the inner panel of the car door are connected by at least one second weld point. A fifth weld point is provided between the connecting plate segment and the inner panel of the car door. The distance between the fifth weld point and the upper edge of the inner panel of the car door is less than 30mm. The upper edge of the inner panel of the car door is connected to the connecting plate segment by a laser weld. A clamping area is provided at the upper edge of the inner door panel where it overlaps with the window frame. At the upper edge of the inner door panel, the gap between the inner door panel and the connecting plate segment is less than or equal to 0.3 mm.

2. The door assembly according to claim 1, characterized in that, The first connecting part is connected to the inner panel of the door by at least one first weld point. When there are multiple first weld points, the multiple first weld points are arranged at intervals in the vertical direction.

3. The door assembly according to claim 1, characterized in that, When there are multiple second solder joints, the multiple second solder joints are arranged at intervals in the vertical direction.

4. The door assembly according to any one of claims 1-3, characterized in that, The window frame also includes an extension plate segment connected to the lower end of the connecting plate segment. The door assembly also includes a latch reinforcement plate disposed on the inner panel of the door. The extension plate segment extends downward to overlap and connect with the latch reinforcement plate.

5. The door assembly according to claim 4, characterized in that, The extension plate segment includes a first overlapping portion extending front to back and a second overlapping portion extending left to right. The first overlapping portion is welded to the latch reinforcement plate and the inner door panel, and the second overlapping portion is welded to the latch reinforcement plate and the inner door panel.

6. The door assembly according to claim 5, characterized in that, The first overlapping portion, the latch reinforcing plate, and the inner door panel are connected by at least one third weld point; The second overlapping part, the latch reinforcement plate and the inner door panel are connected by at least one fourth welding point.

7. The door assembly according to claim 1, characterized in that, The length of the laser weld seam is greater than or equal to 40 mm.

8. A vehicle, characterized in that, The vehicle door assembly includes any one of claims 1-7.

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