Back door frame and vehicle

Abstract

This invention discloses a tailgate frame and a vehicle, relating to the field of vehicle body structure technology. The tailgate frame includes a rear crossbeam area, a left D-pillar beam area, a rear crossbeam area, and a right D-pillar beam area. These areas sequentially surround and form an integrally die-cast aluminum alloy ring structure. The vehicle includes the aforementioned tailgate frame. This invention achieves lightweighting and improves the overall rigidity of the tailgate frame.

Description

Technical Field

[0001] This invention relates to vehicle body structure, specifically to a rear door frame and a vehicle. Background Technology

[0002] With the increasing popularity of new energy vehicles, users have higher and higher requirements for driving experience and range. Only high-performance, lightweight, and integrated body structure design can meet users' experience needs. Therefore, how to improve body rigidity while reducing body weight and achieving lean design and production are currently key indicators of body technology.

[0003] CN211280592U discloses a tailgate frame and a car. The tailgate frame includes a left side D-pillar assembly, a right side D-pillar assembly, a roof rear crossbeam assembly, and a rear skirt assembly. The left end of the roof rear crossbeam assembly is fixedly connected to the top end of the left side D-pillar assembly, and the right end is fixedly connected to the top end of the right side D-pillar assembly. The left end of the rear skirt assembly is fixedly connected to the bottom end of the left side D-pillar assembly, and the right end is fixedly connected to the bottom end of the right side D-pillar assembly. All four components are fixedly connected in pairs to form a closed-loop structure with an annular cavity. Undoubtedly, the technical solution disclosed in the above patent document is a beneficial attempt in the relevant technical field. This tailgate frame improves the torsional resistance of the car body. However, because its structure is a traditional multi-sheet metal spot-welded structure, the integration of components is low, the lightweight effect is poor, tooling investment is large, and lean design and production have not been achieved. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a tailgate frame and a vehicle that can achieve lightweighting and improve the overall rigidity of the tailgate frame.

[0005] A door frame according to the present invention includes a top cover rear crossbeam area, a left D-column beam area, a rear surround crossbeam area and a right D-column beam area. The top cover rear crossbeam area, the left D-column beam area, the rear surround crossbeam area and the right D-column beam area are sequentially arranged to form an integral die-cast aluminum alloy ring structure.

[0006] Furthermore, a reinforcing structure is provided on the back of the door frame. The door frame has an outer ring contour and an inner ring contour. The reinforcing structure is located between the outer ring contour and the inner ring contour. The reinforcing structure includes a first ring rib and a second ring rib arranged at intervals. The first ring rib is disposed on the side of the second ring rib facing the inner ring contour.

[0007] Furthermore, the back of the rear crossbeam area of ​​the top cover is provided with a first reinforcing rib and a second reinforcing rib of the rear crossbeam of the top cover; the back of the left D-column beam area is provided with a first reinforcing rib and a second reinforcing rib of the left D-column beam; the back of the rear crossbeam area is provided with a first reinforcing rib and a second reinforcing rib of the rear crossbeam; and the back of the right D-column beam area is provided with a first reinforcing rib and a second reinforcing rib of the right D-column beam. The first reinforcing rib of the rear crossbeam of the top cover, the first reinforcing rib of the left D-column beam, the first reinforcing rib of the rear crossbeam, and the first reinforcing rib of the right D-column beam are sequentially arranged around each other to form the first ring reinforcement; the second reinforcing rib of the rear crossbeam of the top cover, the second reinforcing rib of the left D-column beam, the second reinforcing rib of the rear crossbeam, and the second reinforcing rib of the right D-column beam are sequentially arranged around each other to form the second ring reinforcement.

[0008] Furthermore, the connections between the first reinforcing rib of the rear crossbeam of the top cover and the first reinforcing rib of the left D-column beam, the first reinforcing rib of the left D-column beam and the first reinforcing rib of the rear crossbeam, the first reinforcing rib of the rear crossbeam and the first reinforcing rib of the right D-column beam, and the first reinforcing rib of the right D-column beam and the first reinforcing rib of the rear crossbeam of the top cover are all arc-shaped transitions; the connections between the second reinforcing rib of the rear crossbeam of the top cover and the second reinforcing rib of the left D-column beam, the second reinforcing rib of the left D-column beam and the second reinforcing rib of the rear crossbeam, the second reinforcing rib of the rear crossbeam and the second reinforcing rib of the right D-column beam, and the second reinforcing rib of the right D-column beam and the second reinforcing rib of the rear crossbeam of the top cover are all arc-shaped transitions.

[0009] Furthermore, the reinforcing structure also includes a plurality of horizontal tie rods spaced apart along the circumferential direction of the back door frame. The length direction of the plurality of horizontal tie rods is along the direction from the outer ring contour to the inner ring contour. The plurality of horizontal tie rods intersect with the first ring rib and the second ring rib and form an intersection point.

[0010] Furthermore, the reinforcing structure also includes a first diagonal brace assembly and a second diagonal brace assembly; the first diagonal brace assembly includes a plurality of first diagonal braces disposed on the back side of the rear crossbeam area of ​​the top cover, the plurality of first diagonal braces being connected end to end in sequence to form a zigzag wave shape, and the beginning and end of each first diagonal brace being connected to one of the intersection points; the second diagonal brace assembly includes a plurality of second diagonal braces disposed on the back side of the rear crossbeam area, the plurality of second diagonal braces being connected end to end in sequence to form a zigzag wave shape, and the beginning and end of each second diagonal brace being connected to one of the intersection points.

[0011] Furthermore, multiple connecting bosses are provided on the upper part of both the left D-column beam area and the right D-column beam area, and each connecting boss is provided with a connecting screw. Each connecting boss is connected to one of the intersection points. The reinforcing structure also includes a third diagonal brace assembly provided on the lower part of the left D-column beam area and a fourth diagonal brace assembly provided on the lower part of the right D-column beam area. The third diagonal brace assembly is formed into a rhombus shape by four third diagonal braces, and the fourth diagonal brace assembly is formed into a rhombus shape by four fourth diagonal braces. Each third diagonal brace and each fourth diagonal brace is connected to the first ring reinforcement or the second ring reinforcement.

[0012] Furthermore, the reinforcing structure also includes a third reinforcing rib of the rear transverse beam disposed in the rear transverse beam region, a third reinforcing rib of the left D-column beam disposed on the back side of the left D-column beam region, and a third reinforcing rib of the right D-column beam disposed on the back side of the left D-column beam region; the third reinforcing ribs of the rear transverse beam, the left D-column beam, and the right D-column beam are all located between the first ring reinforcement and the second ring reinforcement; the left end of the third reinforcing rib of the rear transverse beam is connected to the lower end of the first reinforcing rib of the left D-column beam, and the connection between the two is an arc-shaped transition; the right end of the third reinforcing rib of the rear transverse beam is connected to the right D-column beam. The lower end of the first reinforcing rib of the beam is connected, and the connection between the two is a rounded transition; the upper end of the third reinforcing rib of the left D column beam is connected to the left end of the second reinforcing rib of the rear beam of the top cover, and the connection between the two is a rounded transition; the lower end of the third reinforcing rib of the left D column beam is connected to the left end of the second reinforcing rib of the rear beam, and the connection between the two is a rounded transition; the upper end of the third reinforcing rib of the right D column beam is connected to the right end of the second reinforcing rib of the rear beam of the top cover, and the connection between the two is a rounded transition; the lower end of the third reinforcing rib of the right D column beam is connected to the right end of the second reinforcing rib of the rear beam, and the connection between the two is a rounded transition.

[0013] Furthermore, the rear crossbeam area of ​​the roof is provided with a rear crossbeam overlap surface and a first rear door stop surface; the left D-column beam area and the right D-column beam area are both provided with a side panel overlap surface and a second rear door stop surface; the rear crossbeam area is provided with a third rear door stop surface and a rear floor overlap surface.

[0014] A vehicle according to the present invention includes a rear door frame.

[0015] The beneficial effects of this invention are:

[0016] (1) The ring structure of the back door frame of the present invention uses aluminum alloy material with a material density of 2700kg / m³, which is only one-third that of steel. The overlapping edge structure of the traditional multi-sheet metal welding structure is eliminated, further reducing the weight. The one-piece die-cast structure has a high degree of design freedom. Through CAE simulation analysis, the material thickness and reinforcing rib design can be accurately optimized, which can better facilitate the achievement of various performance targets and achieve the effect of lightweighting, reducing the weight by more than 25%. In addition, the one-piece die-casting molding process is used to form a ring structure of the back door frame, which can form an integral cavity structure, and then form a closed circular force transmission structure. Furthermore, at the four corners and key joint positions of the ring structure of the back door frame, the structural ribs can be optimized to improve the overall rigidity of the back door frame and enhance the user's experience.

[0017] (2) The ring structure of the rear door frame of the present invention integrates multiple traditional body parts into one part, eliminates internal connection welding points, eliminates stamping, welding processes and related investments, reduces mold investment from nearly 80 sets to 1 set, changes fixtures from nearly 20 sets to 2 sets, and changes inspection tools from nearly 20 sets to 1 set, greatly reducing tooling and manpower investment, and realizing lean production of products.

[0018] (3) The ring structure of the rear door frame of the present invention is welded after the upper and lower body are welded, which simplifies the welding dimension chain, improves the overall precision of the rear door frame, and the important mounting surfaces and mounting points of the ring structure of the rear door frame are machined after die casting, which has high precision and reduces the assembly difficulty in the final assembly workshop.

[0019] (4) The reinforcing structure of the present invention combines various forms of reinforcing ribs to form multiple force transmission channels and multiple structures to increase strength, which can improve the overall rigidity of the back door frame. Attached Figure Description

[0020] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0021] Figure 1 This is a schematic diagram of the rear structure of the door frame of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of AA section;

[0023] Figure 3 for Figure 1 Schematic diagram of the BB cross section;

[0024] Figure 4 for Figure 1 A schematic diagram of the CC section;

[0025] Figure 5 for Figure 1 A magnified view of section I;

[0026] Figure 6 This is a schematic diagram of the connection between the connecting screw of the present invention and the rear of the vehicle side panel;

[0027] Figure 7 for Figure 1 A magnified view of section II;

[0028] Figure 8 This is a schematic diagram of the front structure of the back door frame of the present invention.

[0029] The following labels are used in the attached diagram:

[0030] 101-Rear crossbeam area of ​​the top cover, 1011-First reinforcing rib of the rear crossbeam of the top cover, 1012-Second reinforcing rib of the rear crossbeam of the top cover, 1013-First diagonal tie rod, 1014-Overlap surface of the rear crossbeam of the top cover, 1015-First rear door stop surface, 1016-Rear door hinge installation part.

[0031] 102-Left D column beam area, 1021-Left D column beam first reinforcing rib, 1022-Left D column beam second reinforcing rib, 1023-Connecting boss, 1024-Connecting bolt, 1025-Left D column beam third reinforcing rib, 1026-Side panel outer panel overlap surface, 1027-Second rear door stop surface, 1028-Third diagonal tie rod assembly;

[0032] 103-Rear crossbeam area, 1031-First reinforcing rib of rear crossbeam, 1032-Second reinforcing rib of rear crossbeam, 1033-Second diagonal tie, 1034-Third reinforcing rib of rear crossbeam, 1035-Third rear door stop surface, 1036-Rear floor overlap surface.

[0033] 104 - Right D column beam area, 1041 - Right D column beam first reinforcing bar, 1042 - Right D column beam second reinforcing bar, 1043 - Right D column beam third reinforcing bar, 1044 - Fourth diagonal tie bar assembly;

[0034] 105 - Outer ring outline, 106 - Inner ring outline, 107 - First ring rib, 108 - Second ring rib, 109 - Horizontal tie rib;

[0035] 200 - Rear side panel of vehicle, 201 - Mounting hole, 202 - Nut. Detailed Implementation

[0036] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0037] like Figures 1-8As shown, a back door frame in this embodiment includes a top cover rear crossbeam area 101, a left D-column beam area 102, a rear surround crossbeam area 103, and a right D-column beam area 104. The top cover rear crossbeam area 101, the left D-column beam area 102, the rear surround crossbeam area 103, and the right D-column beam area 104 sequentially surround and form an integrally die-cast aluminum alloy ring structure.

[0038] The four areas require a smooth, rounded transition at their joints, with a radius of at least 120mm. The rear crossbeam area 101 connects to the vehicle's rear roof crossbeam; the left D-pillar beam area 102 connects to the rear side panel 200; the rear crossbeam area 103 connects to the rear floor; and the right D-pillar beam area 104 connects to the rear side panel 200. Each area can be adapted to integrate mounting platform features; for example, the rear door hinge mounting part 1016 can be integrated into the rear roof crossbeam area 101. The recommended material thickness for the main body of the rear door frame is 2.5mm-3.5mm. The mounting platform features can have their thickness increased locally based on performance requirements; for example, the recommended material thickness for the rear door hinge mounting part 1016 is 3.5mm-7mm. The left D-pillar beam area 102 and the right D-pillar beam area 104 are essentially symmetrical.

[0039] The ring-shaped structure of the back door frame uses aluminum alloy with a density of 2700 kg / m³, only one-third that of steel. This eliminates the overlapping edges of traditional multi-sheet metal welded structures, further reducing weight. The one-piece die-cast structure offers high design freedom. Through CAE simulation analysis, precise design of material thickness and reinforcing ribs facilitates the achievement of various performance targets, resulting in a weight reduction of over 25%. Furthermore, the one-piece die-casting process forms a ring-shaped back door frame, creating an integral cavity structure and a closed circular force-transmitting structure. At the four corners and key joints, the structural ribs of this ring-shaped back door frame can be optimized, improving the overall rigidity of the back door frame and enhancing the user experience.

[0040] The ring structure of the rear door frame integrates multiple traditional body parts into one part, eliminating internal connecting welds, stamping, welding processes and related investments. The mold input is reduced from nearly 80 sets to 1 set, the fixtures are reduced from nearly 20 sets to 2 sets, and the inspection tools are reduced from nearly 20 sets to 1 set, significantly reducing tooling and manpower input and achieving lean production of the product.

[0041] The ring structure of the tailgate frame is welded last after the upper and lower body panels are welded, which simplifies the welding dimension chain, improves the overall precision of the tailgate frame, and the important mounting surfaces and mounting points of the ring structure of the tailgate frame are machined after die casting, resulting in high precision and reducing the assembly difficulty in the final assembly workshop.

[0042] In this embodiment, a reinforcing structure is provided on the back of the door frame. The door frame has an outer contour 105 and an inner contour 106, and the reinforcing structure is located between the outer contour 105 and the inner contour 106. The reinforcing structure includes a first ring rib 107 and a second ring rib 108 spaced apart. The first ring rib 107 is located on the side of the second ring rib 108 facing the inner contour 106. The first ring rib 107 and the second ring rib 108 form a complete annular force transmission channel, which can improve the overall rigidity of the door frame. The recommended design thickness of the first ring rib 107 and the second ring rib 108 is 3 mm - 5 mm (minimum material thickness after draft testing).

[0043] In this embodiment, the back of the rear crossbeam region 101 of the top cover is provided with a first reinforcing rib 1011 and a second reinforcing rib 1012 of the rear crossbeam; the back of the left D-column beam region 102 is provided with a first reinforcing rib 1021 and a second reinforcing rib 1022 of the left D-column beam; the back of the rear crossbeam region 103 is provided with a first reinforcing rib 1031 and a second reinforcing rib 1032 of the rear crossbeam; and the back of the right D-column beam region 104 is provided with a first reinforcing rib 1041 of the right D-column beam. The second reinforcing rib 1042 of the right D column beam; the first reinforcing rib 1011 of the rear crossbeam of the top cover, the first reinforcing rib 1021 of the left D column beam, the first reinforcing rib 1031 of the rear crossbeam and the first reinforcing rib 1041 of the right D column beam are sequentially arranged around each other to form the first ring rib 107; the second reinforcing rib 1012 of the rear crossbeam of the top cover, the second reinforcing rib 1022 of the left D column beam, the second reinforcing rib 1032 of the rear crossbeam and the second reinforcing rib 1042 of the right D column beam are sequentially arranged around each other to form the second ring rib 108.

[0044] The reinforcing ribs in each area are connected sequentially to further ensure the formation of a complete ring-shaped force transmission channel.

[0045] In this embodiment, the connections between the first reinforcing rib 1011 of the rear crossbeam of the top cover and the first reinforcing rib 1021 of the left D-column beam, the first reinforcing rib 1021 of the left D-column beam and the first reinforcing rib 1031 of the rear crossbeam, the first reinforcing rib 1031 of the rear crossbeam and the first reinforcing rib 1041 of the right D-column beam, and the first reinforcing rib 1041 of the right D-column beam and the first reinforcing rib 1011 of the rear crossbeam of the top cover are all arc-shaped transitions; the connections between the second reinforcing rib 1012 of the rear crossbeam of the top cover and the second reinforcing rib 1022 of the left D-column beam, the second reinforcing rib 1022 of the left D-column beam and the second reinforcing rib 1032 of the rear crossbeam, the second reinforcing rib 1032 of the rear crossbeam and the second reinforcing rib 1042 of the right D-column beam, and the second reinforcing rib 1042 of the right D-column beam and the second reinforcing rib 1012 of the rear crossbeam of the top cover are all arc-shaped transitions.

[0046] The four corner areas feature large-arc transitions to prevent distortion of the stress distribution and further enhance the overall rigidity of the door ring. An arc-shaped transition requires a smooth transition; the recommended design dimension for the transition arc is ≥100mm.

[0047] In this embodiment, the reinforcing structure further includes a plurality of horizontal tie rods 109 spaced apart along the circumferential direction of the back door frame. The length direction of the plurality of horizontal tie rods 109 is along the direction from the outer ring contour 105 to the inner ring contour 106. The plurality of horizontal tie rods 109 intersect with the first ring rib 107 and the second ring rib 108 to form an intersection point. The recommended design thickness of the horizontal tie rods 109 is 2 mm - 4 mm (minimum material thickness after draft).

[0048] The cross bracing 109 and the ring bracing intersect to form a net-like reinforcing structure, which can ensure the overall and local performance requirements of the ring structure of the back door frame.

[0049] In this embodiment, the reinforcing structure further includes a first diagonal brace assembly and a second diagonal brace assembly. The first diagonal brace assembly includes multiple first diagonal braces 1013 disposed on the back side of the rear crossbeam region 101 of the top cover. The multiple first diagonal braces 1013 are connected end to end in a zigzag wave shape, and the beginning and end of each first diagonal brace 1013 are connected to one of the intersection points. The second diagonal brace assembly includes multiple second diagonal braces 1033 disposed on the back side of the rear crossbeam region 103. The multiple second diagonal braces 1033 are connected end to end in a zigzag wave shape, and the beginning and end of each second diagonal brace 1033 are connected to one of the intersection points. The recommended design thickness for the diagonal braces is 2 mm - 4 mm (minimum thickness after draft molding).

[0050] The first and second diagonal bracing components create a continuous zigzag wave shape in the local area of ​​the reinforcing rib structure. Together with the aforementioned net-shaped reinforcing rib structure, they enhance the stiffness of the entire beam, thereby further increasing the overall strength.

[0051] In this embodiment, multiple connecting bosses 1023 are provided on the upper part of both the left D-column beam region 102 and the right D-column beam region 104. Each connecting boss 1023 is provided with a connecting screw 1024, and each connecting boss 1023 is connected to one of the intersection points. The reinforcing structure also includes a third diagonal bracing assembly 1028 provided on the lower part of the left D-column beam region 102 and a fourth diagonal bracing assembly 1044 provided on the lower part of the right D-column beam region 104. The third diagonal bracing assembly 1028 is formed into a rhombus shape by four third diagonal bracings, and the fourth diagonal bracing assembly 1044 is formed into a rhombus shape by four fourth diagonal bracings. Each third diagonal bracing and each fourth diagonal bracing is connected to the first ring reinforcement 107 or the second ring reinforcement 108.

[0052] The connecting boss 1023 can abut against the rear part 200 of the vehicle side panel, and the connecting screw 1024 can be inserted into the mounting hole 201 of the rear part 200 of the vehicle side panel and connected to the connecting screw 1024 by the nut 202, thereby realizing the connection and fixation between the left D-pillar beam area 102 and the right D-pillar beam area 104 and the rear part 200 of the vehicle side panel. The connecting boss 1023 can provide local reinforcement to this connection.

[0053] To ensure that the assembly of the rear door frame does not interfere, the connecting screw 1024 is arranged along the front and rear direction of the vehicle. After being integrally die-cast, it is formed by machining to form a standard external thread with a nominal diameter ≥ M8. The mounting and matching surface of the connecting boss 1023 must be machined to ensure that the surface contour accuracy of the mounting surface meets the requirement of ±0.5mm, and the diameter of the connecting boss 1023 is not less than 20mm.

[0054] The third diagonal bracing assembly 1028 and the fourth diagonal bracing assembly 1044 can locally reinforce the lower part of the left D column beam region 102 and the right D column beam region 104, thereby improving the torsional and bending resistance of the corner region.

[0055] In this embodiment, the reinforcing structure further includes a third reinforcing rib 1034 of the rear crossbeam in the rear crossbeam region 103, a third reinforcing rib 1025 of the left D-column beam in the back of the left D-column beam region 102, and a third reinforcing rib 1043 of the right D-column beam in the back of the left D-column beam region 102; the third reinforcing rib 1034 of the rear crossbeam, the third reinforcing rib 1025 of the left D-column beam, and the third reinforcing rib 1043 of the right D-column beam are all located between the first ring rib 107 and the second ring rib 108; the left end of the third reinforcing rib 1034 of the rear crossbeam is connected to the lower end of the first reinforcing rib 1021 of the left D-column beam, and the connection between the two is an arc-shaped transition; the third reinforcing rib 1034 of the rear crossbeam... The right end of the third reinforcing rib 1025 of the left D-column beam is connected to the lower end of the first reinforcing rib 1041 of the right D-column beam, and the connection between the two is an arc-shaped transition; the upper end of the third reinforcing rib 1025 of the left D-column beam is connected to the left end of the second reinforcing rib 1012 of the rear crossbeam of the top cover, and the connection between the two is an arc-shaped transition; the lower end of the third reinforcing rib 1025 of the left D-column beam is connected to the left end of the second reinforcing rib 1032 of the rear crossbeam, and the connection between the two is an arc-shaped transition; the upper end of the third reinforcing rib 1043 of the right D-column beam is connected to the right end of the second reinforcing rib 1012 of the rear crossbeam of the top cover, and the connection between the two is an arc-shaped transition; the lower end of the third reinforcing rib 1043 of the right D-column beam is connected to the right end of the second reinforcing rib 1032 of the rear crossbeam, and the connection between the two is an arc-shaped transition.

[0056] A portion of the first ring reinforcement 107 is divided into two parts in the rear crossbeam area 103, namely, the lower end of the first reinforcing rib 1021 of the left D column beam and the lower end of the first reinforcing rib 1041 of the right D column beam. The lower end of the first reinforcing rib 1021 of the left D column beam is simultaneously connected to the left end of the first reinforcing rib 1031 of the rear crossbeam and the left end of the third reinforcing rib 1034 of the rear crossbeam, forming an arc-shaped transition at the connection. The lower end of the first reinforcing rib 1041 of the right D column beam is simultaneously connected to the right end of the first reinforcing rib 1031 of the rear crossbeam and the right end of the third reinforcing rib 1034 of the rear crossbeam, forming an arc-shaped transition at the connection. This allows the force on the first reinforcing rib 1021 of the left D column beam and the first reinforcing rib 1041 of the right D column beam to be distributed to two different force transmission paths.

[0057] A portion of the second ring reinforcement 108 is divided into two parts in the left D column beam region 102 and the right D column beam region 104, that is, after the second reinforcing reinforcement 1012 of the rear crossbeam of the top cover is divided into two parts, it is combined into one part in the second reinforcing reinforcement 1032 of the rear crossbeam. This allows the force on the second reinforcing reinforcement 1012 of the rear crossbeam of the top cover to be distributed to two different force transmission paths and finally merged and transmitted to the second reinforcing reinforcement 1032 of the rear crossbeam.

[0058] The above structure is conducive to the transmission and distribution of forces, and can reduce the width space requirement of the rear beam area 101 of the top cover in the vertical direction.

[0059] The aforementioned arc-shaped transition refers to a smooth transition, with a preferred arc size of ≥100mm.

[0060] In this embodiment, the rear crossbeam area 101 of the roof is provided with a rear crossbeam overlap surface 1014 and a first rear door stop surface 1015; the left D-column beam area 102 and the right D-column beam area 104 are both provided with a side panel overlap surface 1026 and a second rear door stop surface 1027; the rear crossbeam area 103 is provided with a third rear door stop surface 1035 and a rear floor overlap surface 1036.

[0061] The first tailgate stop surface 1015, the second tailgate stop surface 1027, and the third tailgate stop surface 1035 are all used for installing tailgate sealing strips. The roof rear crossbeam overlap surface 1014 is used to connect with the roof rear crossbeam, the side panel outer panel overlap surface 1026 is used to connect with the rear side panel 200 of the vehicle, and the rear floor overlap surface 1036 is used to connect with the flanged surface of the rear floor.

[0062] One embodiment of the vehicle includes a rear door frame.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A door frame with a backrest, characterized in that: It includes a rear crossbeam area (101), a left D-column beam area (102), a rear crossbeam area (103), and a right D-column beam area (104). The rear crossbeam area (101), the left D-column beam area (102), the rear crossbeam area (103), and the right D-column beam area (104) are sequentially arranged to form an integral die-cast aluminum alloy ring structure. The back of the door frame is provided with a reinforcing structure, which includes a first ring rib (107) and a second ring rib (108) arranged at intervals. The back of the top cover rear crossbeam area (101) is provided with a second reinforcing rib (1012) of the top cover rear crossbeam, the back of the left D column beam area (102) is provided with a first reinforcing rib (1021) of the left D column beam, the back of the rear crossbeam area (103) is provided with a second reinforcing rib (1032) of the rear crossbeam, and the back of the right D column beam area (104) is provided with a first reinforcing rib (1041) of the right D column beam. The reinforcing structure also includes a third reinforcing rib (1034) of the rear crossbeam in the rear crossbeam area (103), a third reinforcing rib (1025) of the left D-column beam on the back side of the left D-column beam area (102), and a third reinforcing rib (1043) of the right D-column beam on the back side of the left D-column beam area (102); the third reinforcing rib (1034), the third reinforcing rib (1025), and the third reinforcing rib (1043) of the right D-column beam are all located between the first ring rib (107) and the second ring rib (108); the left end of the third reinforcing rib (1034) of the rear crossbeam is connected to the lower end of the first reinforcing rib (1021) of the left D-column beam and the connection between the two is an arc-shaped transition, and the third reinforcing rib (1034) of the rear crossbeam is located between the first ring rib (107) and the second ring rib (108); the left end of the third reinforcing rib (1034) of the rear crossbeam is connected to the lower end of the first reinforcing rib (1021) of the left D-column beam and the connection between the two is an arc-shaped transition, and the third reinforcing rib (1034) of the rear crossbeam is located between the first ring rib (1025) and the second ring rib (1043). 4) The right end of the third reinforcing rib (1025) of the left D column beam is connected to the lower end of the first reinforcing rib (1041) of the right D column beam, and the connection between the two is an arc-shaped transition; The upper end of the third reinforcing rib (1025) of the left D column beam is connected to the left end of the second reinforcing rib (1012) of the rear crossbeam of the top cover, and the connection between the two is an arc-shaped transition; The lower end of the third reinforcing rib (1025) of the left D column beam is connected to the left end of the second reinforcing rib (1032) of the rear crossbeam, and the connection between the two is an arc-shaped transition; The upper end of the third reinforcing rib (1043) of the right D column beam is connected to the right end of the second reinforcing rib (1012) of the rear crossbeam of the top cover, and the connection between the two is an arc-shaped transition; The lower end of the third reinforcing rib (1043) of the right D column beam is connected to the right end of the second reinforcing rib (1032) of the rear crossbeam, and the connection between the two is an arc-shaped transition.

2. The back door frame according to claim 1, characterized in that, The back door frame has an outer ring profile (105) and an inner ring profile (106), and the reinforcing structure is located between the outer ring profile (105) and the inner ring profile (106); the first ring rib (107) is disposed on the side of the second ring rib (108) facing the inner ring profile (106).

3. The back door frame according to claim 2, characterized in that: The back of the rear crossbeam area (101) of the top cover is provided with a first reinforcing rib (1011) of the rear crossbeam of the top cover; the back of the left D-column beam area (102) is provided with a second reinforcing rib (1022) of the left D-column beam; the back of the rear crossbeam area (103) is provided with a first reinforcing rib (1031) of the rear crossbeam; and the back of the right D-column beam area (104) is provided with a second reinforcing rib (1042) of the right D-column beam. The first reinforcing rib (1011) of the rear crossbeam of the top cover, the... The first reinforcing rib (1021) of the left D column beam, the first reinforcing rib (1031) of the rear crossbeam, and the first reinforcing rib (1041) of the right D column beam are sequentially arranged around each other to form the first ring rib (107); the second reinforcing rib (1012) of the rear crossbeam of the top cover, the second reinforcing rib (1022) of the left D column beam, the second reinforcing rib (1032) of the rear crossbeam, and the second reinforcing rib (1042) of the right D column beam are sequentially arranged around each other to form the second ring rib (108).

4. The back door frame according to claim 3, characterized in that: The connection points of the first reinforcing rib (1011) of the rear crossbeam of the top cover and the first reinforcing rib (1021) of the left D column beam, the connection points of the first reinforcing rib (1021) of the left D column beam and the first reinforcing rib (1031) of the rear crossbeam, the connection points of the first reinforcing rib (1031) of the rear crossbeam and the first reinforcing rib (1041) of the right D column beam, and the connection points of the first reinforcing rib (1041) of the right D column beam and the first reinforcing rib (1011) of the rear crossbeam of the top cover are all arc-shaped transitions. The connection points of the second reinforcing rib (1012) of the rear crossbeam of the top cover and the second reinforcing rib (1022) of the left D column beam, the connection points of the second reinforcing rib (1022) of the left D column beam and the second reinforcing rib (1032) of the rear crossbeam, the connection points of the second reinforcing rib (1032) of the rear crossbeam and the second reinforcing rib (1042) of the right D column beam, and the connection points of the second reinforcing rib (1042) of the right D column beam and the second reinforcing rib (1012) of the rear crossbeam of the top cover are all arc-shaped transitions.

5. The back door frame according to claim 3, characterized in that: The reinforcing structure also includes a plurality of horizontal tie rods (109) spaced apart along the circumferential direction of the back door frame. The length direction of the plurality of horizontal tie rods (109) is along the direction from the outer ring contour (105) to the inner ring contour (106). The plurality of horizontal tie rods (109) intersect with the first ring rib (107) and the second ring rib (108) and form an intersection point.

6. The back door frame according to claim 5, characterized in that: The reinforcing structure further includes a first diagonal brace assembly and a second diagonal brace assembly; the first diagonal brace assembly includes a plurality of first diagonal braces (1013) disposed on the back side of the rear crossbeam area (101) of the top cover, the plurality of first diagonal braces (1013) being connected end to end in sequence to form a zigzag wave shape, and the beginning and end of each first diagonal brace (1013) being connected to one of the intersection points; the second diagonal brace assembly includes a plurality of second diagonal braces (1033) disposed on the back side of the rear crossbeam area (103), the plurality of second diagonal braces (1033) being connected end to end in sequence to form a zigzag wave shape, and the beginning and end of each second diagonal brace (1033) being connected to one of the intersection points.

7. The back door frame according to claim 6, characterized in that: The upper part of the left D column beam area (102) and the right D column beam area (104) are provided with multiple connecting bosses (1023), and each connecting boss (1023) is provided with a connecting screw (1024). Each connecting boss (1023) is connected to one of the intersection points. The reinforcing structure also includes a third diagonal bracing assembly (1028) provided in the lower part of the left D column beam area (102) and a fourth diagonal bracing assembly (1044) provided in the lower part of the right D column beam area (104). The third diagonal bracing assembly (1028) is formed into a rhombus shape by four third diagonal bracings, and the fourth diagonal bracing assembly (1044) is formed into a rhombus shape by four fourth diagonal bracings. Each third diagonal bracing and each fourth diagonal bracing is connected to the first ring reinforcement (107) or the second ring reinforcement (108).

8. The back door frame according to claim 1, characterized in that: The rear crossbeam area (101) of the roof is provided with a rear crossbeam overlap surface (1014) and a first rear door stop surface (1015); the left D column beam area (102) and the right D column beam area (104) are both provided with a side panel overlap surface (1026) and a second rear door stop surface (1027); the rear crossbeam area (103) is provided with a third rear door stop surface (1035) and a rear floor overlap surface (1036).

9. A vehicle, characterized in that: Includes the back door frame as described in any one of claims 1-8.

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