Back door frame structure and vehicle

Abstract

The utility model discloses a back door frame structure and a vehicle, and relates to the technical field of vehicle bodies, the back door frame structure comprises a top frame assembly, a bottom frame assembly and two side frame assemblies, the top frame assembly, one side frame assembly, the bottom frame assembly and the other side frame assembly are connected end to end to form a closed annular structure; the side frame assembly comprises a D-column lower bridging piece, and a side cavity is formed in the side frame assembly; the bottom frame assembly comprises a rear wall inner plate and a rear wall outer plate, the rear wall outer plate covers the rear wall inner plate, and a bottom cavity is formed between the rear wall inner plate and the rear wall outer plate; the D-column lower bridging piece is connected with the rear wall inner plate, the rear wall outer plate covers at least part of the D-column lower bridging piece, a rear wall support is installed at the corner of the D-column lower bridging piece, and the rear wall support is connected with the rear wall outer plate so that the side cavity and the bottom cavity can be separated. According to the technical scheme, the torsional rigidity of the vehicle body is improved, and the use safety of the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle bodies, in particular to a back door frame structure and a vehicle. Background Art

[0002] With the development of the vehicle industry and the improvement of the overall social and economic level, users have put forward higher requirements on vehicle safety, durability, reliability, driving comfort, NVH performance and other qualities.

[0003] The rigidity of the tailgate frame is critical to improving the torsional rigidity of the vehicle body, which is the most basic performance indicator of the vehicle. The torsional rigidity of the vehicle body is an important indicator to measure the structural strength of the vehicle, which reflects the ability of the relevant parts of the vehicle to resist deformation when subjected to external forces.

[0004] In order to improve the torsional rigidity of the vehicle body, the commonly used method is to change the material thickness of the body sheet metal parts related to the key structure of the rear body, but this requires the redevelopment of the body sheet metal mold, which is costly. Utility Model Content

[0005] The main purpose of the utility model is to provide a back door frame structure and a vehicle, aiming to improve the torsional rigidity of the vehicle body and improve the safety of the vehicle.

[0006] To achieve the above-mentioned purpose, the back door frame structure proposed by the utility model includes a top frame assembly, a bottom frame assembly and two side frame assemblies, wherein the top frame assembly, one side frame assembly, the bottom frame assembly and the other side frame assembly are connected end to end to form a closed ring structure;

[0007] The side frame assembly includes a D-pillar lower bridge member, and a side cavity is formed in the side frame assembly;

[0008] The bottom frame assembly includes a rear enclosure inner plate and a rear enclosure outer plate, wherein the rear enclosure outer plate is disposed on the rear enclosure inner plate, and a bottom cavity is formed between the two;

[0009] The D-pillar lower bridge piece is connected to the rear enclosure inner panel, and the rear enclosure outer panel covers at least a portion of the D-pillar lower bridge piece. A rear enclosure bracket is installed at the corner of the D-pillar lower bridge piece, and the rear enclosure bracket is connected to the rear enclosure outer panel to separate the side cavity and the bottom cavity.

[0010] In one embodiment, the rear wall bracket includes a first bracket and a second bracket connected to each other, the first bracket extends along the width direction of the vehicle, and the second bracket extends in the same direction as the corner of the D-pillar lower bridge member.

[0011] In one embodiment, a first skirt, a second skirt and a third skirt are provided on the first bracket, the first skirt is used to connect with the lower bridge member of the D-pillar, the second skirt is used to connect with the rear outer panel, and the third skirt is used to connect with the lower bridge member of the D-pillar and the second bracket.

[0012] In one embodiment, a first connection portion and a plurality of second connection portions are provided on the second bracket, wherein the first connection portion is used to be connected to the rear outer panel, and the plurality of second connection portions are all used to be connected to the D-pillar lower bridge member, and one of the second connection portions is also used to connect to a luggage box hook.

[0013] In one embodiment, a tailgate latch reinforcement plate is installed in the bottom cavity, and the tailgate latch reinforcement plate connects the rear enclosure inner plate and the rear enclosure outer plate to separate the bottom cavity.

[0014] In one embodiment, along the height direction of the vehicle, a plurality of welding portions are provided at both ends of the back door lock reinforcement plate to be respectively welded to the rear enclosure inner panel and the rear enclosure outer panel; and / or

[0015] Along the width direction of the vehicle, support legs are respectively provided on both sides of the back door lock reinforcement plate, and the support legs extend toward the rear outer panel and overlap the rear outer panel; and / or

[0016] The tailgate lock reinforcement plate is provided with a leakage hole, and the leakage hole is used for the swimming liquid to flow to between the rear enclosure inner plate and the tailgate lock reinforcement plate.

[0017] In one embodiment, the side frame assembly further includes a D-pillar, a D-pillar joint, a water flow groove and a taillight mounting plate, and the two ends of the D-pillar are respectively connected to the D-pillar lower bridge member and the D-pillar joint; along the height direction of the vehicle, the water flow groove and the taillight mounting plate are connected and covered on the D-pillar, the D-pillar lower bridge member and the D-pillar joint to enclose part of the side cavity;

[0018] A water trough bracket and a taillight mounting plate bracket are installed on the D-pillar at intervals, one side of the water trough bracket is connected to the water trough and the taillight mounting plate, and one side of the taillight mounting plate bracket is connected to the taillight mounting plate; the water trough bracket and the taillight mounting plate bracket separate the side cavity.

[0019] In one embodiment, a tailgate stay reinforcement plate and a tailgate hinge reinforcement plate are installed on the D-pillar joint, wherein the tailgate stay reinforcement plate is used to install the tailgate stay, and the tailgate hinge reinforcement plate is used to install the tailgate hinge.

[0020] In one embodiment, the top frame assembly includes a rear cross beam inner plate, a rear cross beam outer plate and a top cover outer plate, the two ends of the rear cross beam inner plate are respectively connected to the two D-pillar joints, the rear cross beam outer plate is covered on the rear cross beam inner plate, the top cover outer plate is covered on the rear cross beam outer plate, and the rear cross beam inner plate and the rear cross beam outer plate are combined to form a top cavity;

[0021] A rear cross beam bracket is installed on the inner plate of the rear cross beam, and the rear cross beam bracket partitions the top cavity.

[0022] In one embodiment, the D-pillar joint is also covered with a D-pillar joint reinforcement plate, the D-pillar joint reinforcement plate is connected to the rear cross beam outer plate and the tailgate hinge reinforcement plate, and the top cover outer plate and the water flow channel are both partially covered with the D-pillar joint reinforcement plate.

[0023] The utility model also provides a vehicle, comprising the tailgate frame structure.

[0024] The technical solution of the utility model is to arrange a top frame assembly, a side frame assembly, a bottom frame assembly and another side frame assembly connected end to end in the tailgate frame structure, so that the tailgate frame structure is a closed ring structure, wherein the side frame assembly includes a D-pillar lower bridge member, and a side cavity is formed in the side frame assembly; the bottom frame assembly includes a rear enclosure inner plate and a rear enclosure outer plate covering the rear enclosure inner plate, and a bottom cavity is formed between the rear enclosure inner plate and the rear enclosure outer plate; the D-pillar lower bridge member is connected to the rear enclosure inner plate, and the rear enclosure outer plate covers a part of the D-pillar lower bridge member, a rear enclosure bracket is installed at the corner of the D-pillar lower bridge member, and the rear enclosure bracket is also connected to the rear enclosure outer plate to separate the side cavity and the bottom cavity. In this way, on the one hand, the rear panel bracket is installed at the corner of the bridge piece under the D-pillar, which enhances the structural strength of the corner of the tailgate frame structure and improves the torsional stiffness of the tailgate frame structure, thereby improving the safety of the vehicle beam; on the other hand, the rear panel bracket separates the side cavity and the bottom cavity, preventing the sound from being transmitted along the side cavity to the bottom cavity and then generating an echo, thereby improving the vehicle's NVH performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A structural schematic diagram of an embodiment of a back door frame structure provided by the utility model;

[0027] Figure 2 for Figure 1 A schematic diagram of a partial exploded structure of an embodiment of a back door frame structure;

[0028] Figure 3 for Figure 1 An exploded structural diagram of an embodiment of a side frame assembly in FIG.

[0029] Figure 4 for Figure 3 A structural schematic diagram of another perspective of an embodiment of the first bracket;

[0030] Figure 5 for Figure 3 A schematic structural diagram of another perspective of an embodiment of the second bracket;

[0031] Figure 6 for Figure 2 A structural schematic diagram of an embodiment of a back door lock reinforcement plate;

[0032] Figure 7 for Figure 1 An exploded structural diagram of an embodiment of a top frame assembly;

[0033] Figure 8 for Figure 7 A schematic structural diagram of an embodiment of a rear cross beam support;

[0034] Fig. 9 for Figure 3 A schematic structural diagram of an embodiment of a water flow trough support;

[0035] Fig.10 for Figure 3 A structural schematic diagram of an embodiment of a taillight mounting plate bracket.

[0036] Description of Figure Numbers:

[0037] 100, top frame assembly; 110, rear cross beam inner plate; 120, rear cross beam outer plate; 130, top cover outer plate; 140, rear cross beam bracket; 141, first welding edge; 142, second welding edge; 143, boss; 144, through hole;

[0038] 200, bottom frame assembly; 210, rear enclosure inner plate; 220, rear enclosure outer plate; 230, back door lock reinforcement plate; 231, welding part; 232, support leg; 233, leakage hole;

[0039] 300, side frame assembly; 310, D-pillar lower bridge; 320, D-pillar; 321, water flow channel bracket; 3211, first connecting edge; 3212, second connecting edge; 3213, reinforcement protrusion; 3214, opening; 322, taillight mounting plate bracket; 3221, first connecting edge; 3222, second connecting edge; 3223, sink; 3224, weight reduction hole; 330, D-pillar joint; 331, back door support rod reinforcement plate; 332, back door hinge reinforcement plate; 340, water flow channel; 350, taillight mounting plate; 360, D-pillar joint reinforcement plate;

[0040] 400, rear enclosure bracket; 410, first bracket; 411, first skirt; 412, second skirt; 413, third skirt; 420, second bracket; 421, first connecting portion; 422, second connecting portion; 423, bolt hole; 424, positioning hole.

[0041] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0045] With the development of the vehicle industry and the improvement of the overall social and economic level, users have put forward higher requirements on vehicle safety, durability, reliability, driving comfort, NVH performance and other qualities.

[0046] The rigidity of the tailgate frame is critical to improving the torsional rigidity of the vehicle body, which is the most basic performance indicator of the vehicle. The torsional rigidity of the vehicle body is an important indicator to measure the structural strength of the vehicle, which reflects the ability of the relevant parts of the vehicle to resist deformation when subjected to external forces.

[0047] In order to improve the torsional rigidity of the vehicle body, the commonly used method is to change the material thickness of the body sheet metal parts related to the key structure of the rear body, but this requires the redevelopment of the body sheet metal mold, which is costly.

[0048] The utility model provides a back door frame structure.

[0049] See also Figure 1 and Figure 2 In one embodiment of the utility model, the back door frame structure includes a top frame assembly 100, a bottom frame assembly 200 and two side frame assemblies 300. The top frame assembly 100, one side frame assembly 300, the bottom frame assembly 200 and the other side frame assembly 300 are connected end to end to form a closed ring structure; the side frame assembly 300 includes a D-pillar lower bridge 310, and a side cavity is formed in the side frame assembly 300; the bottom frame assembly 200 includes a rear inner panel 210 and a rear enclosure outer panel 220, the rear enclosure outer panel 220 is covered on the rear enclosure inner panel 210, and a bottom cavity is formed between the two; a D-pillar lower bridge member 310 is connected to the rear enclosure inner panel 210, and the rear enclosure outer panel 220 is covered on at least a portion of the D-pillar lower bridge member 310, a rear enclosure bracket 400 is installed at the corner of the D-pillar lower bridge member 310, and the rear enclosure bracket 400 is connected to the rear enclosure outer panel 220 to separate the side cavity and the bottom cavity.

[0050] Specifically, in the back door frame structure, the top frame assembly 100 is located on the upper side, the bottom frame assembly 200 is located on the lower side, and the two side frame assemblies 300 are respectively located on the left and right sides, and the top frame assembly 100, one side frame assembly 300, the bottom frame assembly 200 and the other side frame assembly 300 are connected end to end to form a closed annular structure. The structures of the two side frame assemblies 300 are the same, and the connection structure of the one side frame assembly 300 with the top frame assembly 100 and the bottom frame assembly 200 is also the same as the connection structure of the other side frame assembly 300 with the top frame assembly 100 and the bottom frame assembly 200. Compared with the open back door frame structure, the closed annular structure is conducive to improving the overall structural strength of the back door frame structure. Along the length direction of the vehicle, the back door frame structure has a certain thickness. Generally, the back door frame structure includes an inner plate and an outer plate, the inner plate is located in the direction close to the front of the vehicle, the outer plate is located in the direction close to the rear of the vehicle, the outer plate cover is arranged on the inner plate, and a cavity is formed between the inner plate and the outer plate.

[0051] The side frame assembly 300 includes a D-pillar lower bridge member 310, which is a part of the inner plate of the side frame assembly 300. The D-pillar lower bridge member 310 extends from the height direction of the vehicle to the width direction of the vehicle, that is, the D-pillar lower bridge member 310 is arc-shaped. At the same time, a side cavity is also formed in the side frame assembly 300. The bottom frame assembly 200 includes a rear enclosure inner plate 210 and a rear enclosure outer plate 220, wherein the rear enclosure inner plate 210 is the inner plate of the bottom frame assembly 200, and the rear enclosure outer plate 220 is the outer plate of the bottom frame assembly 200. The rear enclosure outer plate 220 is covered on the rear enclosure inner plate 210, and at the same time, a bottom cavity is also formed between the rear enclosure inner plate 210 and the rear enclosure outer plate 220.

[0052] The D-pillar lower bridge 310 is connected to the rear enclosure inner panel 210. In one embodiment, the two are welded. The length of the rear enclosure outer panel 220 is longer than that of the rear enclosure inner panel 210. In the width direction of the vehicle, after the rear enclosure outer panel 220 fully covers the rear enclosure inner panel 210, it can still cover the portion of the D-pillar lower bridge 310 extending in the width direction of the vehicle. A rear enclosure bracket 400 is installed at the corner of the D-pillar lower bridge 310. In the length direction of the vehicle, the side of the rear enclosure bracket 400 away from the D-pillar lower bridge 310 is connected to the rear enclosure outer panel 220, thereby isolating the side cavity and the bottom cavity, so that the side cavity and the bottom cavity are not connected.

[0053] Generally, the impact stress on the lower corner of the back door frame structure is relatively large. The back wall bracket 400 is added at the corner of the D-pillar lower bridge 310 to increase the structural strength of the back door frame structure at the corner, improve the torsional rigidity of the back door frame structure, thereby improving the safety of the vehicle beam, and further improving the NVH performance and dynamic handling performance of the vehicle. At the same time, the back wall bracket 400 is installed on the D-pillar lower bridge 310 and is also connected to the back wall outer panel 220, so that the stress transmitted to the D-pillar lower bridge 310 can be transmitted to the back wall outer panel 220 through the back wall bracket 400, thereby reducing the stress impact on the D-pillar lower bridge 310. In addition, the back wall bracket 400 also separates the side cavity and the bottom cavity, thereby blocking the propagation of sound in the cavity, preventing the generation of echoes, and further improving the NVH performance of the vehicle.

[0054] The technical solution of the utility model is to arrange a top frame assembly 100, a side frame assembly 300, a bottom frame assembly 200 and another side frame assembly 300 connected end to end in the back door frame structure, so that the back door frame structure is a closed ring structure, wherein the side frame assembly 300 includes a D-pillar lower bridge member 310, and a side cavity is formed in the side frame assembly 300; the bottom frame assembly 200 includes a rear enclosure inner plate 210 and a rear enclosure outer plate 220 covering the rear enclosure inner plate 210, and a bottom cavity is formed between the rear enclosure inner plate 210 and the rear enclosure outer plate 220; the D-pillar lower bridge member 310 is connected to the rear enclosure inner plate 210, and the rear enclosure outer plate 220 covers a part of the D-pillar lower bridge member 310, and a rear enclosure bracket 400 is installed at the corner of the D-pillar lower bridge member 310, and the rear enclosure bracket 400 is also connected to the rear enclosure outer plate 220 to separate the side cavity and the bottom cavity. In this way, on the one hand, the rear enclosure bracket 400 is installed at the corner of the D-pillar lower bridge 310, which enhances the structural strength of the corner of the tailgate frame structure and improves the torsional stiffness of the tailgate frame structure, thereby improving the safety of the vehicle beam; on the other hand, the rear enclosure bracket 400 separates the side cavity and the bottom cavity, thereby preventing the sound from being transmitted along the side cavity to the bottom cavity and generating an echo, thereby improving the NVH performance of the vehicle.

[0055] Please refer to Figure 3 In an embodiment of the present invention, the rear enclosure bracket 400 includes a first bracket 410 and a second bracket 420 connected to each other. The first bracket 410 extends along the width direction of the vehicle, and the second bracket 420 extends in the same direction as the corner of the D-pillar lower bridge member 310.

[0056] Specifically, in the scheme shown in the figure of the utility model, the rear enclosure bracket 400 includes a first bracket 410 and a second bracket 420 connected to each other, wherein the first bracket 410 extends in the width direction of the vehicle, and can bear the impact of the back door frame structure in the width direction of the vehicle. The extension direction of the second bracket 420 is consistent with the extension direction of the corner of the D-pillar lower bridge 310. It can be understood that the impact stress at the lower corner of the back door frame structure is relatively large. In order to improve the structural strength of this place, the second bracket 420 needs to cover the corner range. In one embodiment, the second bracket 420 is arranged on the side of the D-pillar lower bridge 310 close to the center of the back door frame structure, and the length of the second bracket 420 is slightly smaller than the length of the D-pillar lower bridge 310, so as to cover the corner range to improve the structural strength of the back door frame structure at the corner. The arrangement of the first bracket 410 and the second bracket 420 provides multi-directional support for the back door frame structure, and improves the ability of the back door frame structure to withstand stress impacts in different directions.

[0057] Please refer to Figure 4 In an embodiment of the utility model, a first skirt 411, a second skirt 412 and a third skirt 413 are provided on the first bracket 410. The first skirt 411 is used to connect with the lower bridge member 310 of the D-pillar, the second skirt 412 is used to connect with the rear outer panel 220, and the third skirt 413 is used to connect with the lower bridge member 310 of the D-pillar and the second bracket 420.

[0058] Specifically, the first bracket 410 is provided with a plurality of skirts for connecting with the D-pillar lower bridge member 310 and the rear outer panel 220. The first bracket 410 is provided with a first skirt 411 on the side facing the lower side of the vehicle and on the side facing the front of the vehicle. At the same time, the first bracket 410 is also provided with a first skirt 411 on the side close to the center of the back door frame structure. The first skirt 411 is used to connect with the D-pillar lower bridge member 310. In one embodiment, the first skirt 411 is used to be welded to the D-pillar lower bridge member 310. The first bracket 410 is provided with a second skirt 412 on the side facing the rear of the vehicle. At the same time, the first bracket 410 is also provided with a second skirt 412 on the side away from the center of the back door frame structure. The second skirt 412 is used to connect with the rear outer panel 220. In one embodiment, the second skirt 412 is used to be welded to the rear outer panel 220. The first bracket 410 is also provided with a third skirt 413 on a side close to the back door frame structure, and the third skirt 413 is used to be connected to the D-pillar lower bridge 310 and the second bracket 420 at the same time. In one embodiment, the third skirt 413 is used to be welded to the D-pillar lower bridge 310 and the second bracket 420 at the same time. In this way, multiple skirts are provided on the first bracket 410, thereby increasing the connection points between the first bracket 410 and the D-pillar lower bridge 310 and the rear outer panel 220, and improving the connection stability between the first bracket 410 and the D-pillar lower bridge 310 and the rear outer panel 220.

[0059] Please refer to Figure 5 In an embodiment of the utility model, a first connection portion 421 and a plurality of second connection portions 422 are provided on the second bracket 420. The first connection portion 421 is used to connect with the rear outer panel 220. The plurality of second connection portions 422 are all used to connect with the D-pillar lower bridge member 310. A second connection portion 422 is also used to connect with a luggage box hook.

[0060] Specifically, the second bracket 420 is provided with a first connection portion 421 on a side close to the rear inner panel 210, and the first connection portion 421 is used to connect with the rear outer panel 220. In one embodiment, the first connection portion 421 is used to weld with the rear outer panel 220. The second bracket 420 is provided with a second connection portion 422 on a side close to the center of the back door frame structure, and the second bracket 420 is also provided with a second connection portion 422 on a side away from the center of the back door frame structure. The second bracket 420 is also provided with a second connection portion 422 on a side close to the top of the vehicle, and the second connection portion 422 is used to connect with the D-pillar lower bridge member 310. In one embodiment, the second connection portion 422 is used to weld with the D-pillar lower bridge member 310. In this way, a plurality of connection portions are provided on the second bracket 420, thereby increasing the connection points between the second bracket 420 and the D-pillar lower bridge member 310 and the rear outer panel 220, and improving the connection stability between the second bracket 420 and the D-pillar lower bridge member 310 and the rear outer panel 220.

[0061] At the same time, in the second connection part 422 on the side close to the back door frame structure, a bolt hole 423 is also opened on the second connection part 422 close to the top of the vehicle, and the bolt hole 423 is used to connect the luggage hook, and the luggage hook is used to connect the luggage to limit the position of the luggage in the trunk. At the same time, in order to quickly and accurately install the luggage hook, a positioning hole 424 is also opened on the second connection part 422, and the size and shape of the positioning hole 424 are not limited here.

[0062] Please refer to Figure 6 In an embodiment of the present invention, a tailgate latch reinforcement plate 230 is installed in the bottom cavity, and the tailgate latch reinforcement plate 230 connects the rear enclosure inner plate 210 and the rear enclosure outer plate 220 to separate the bottom cavity.

[0063] Specifically, a back door lock reinforcement plate 230 is also installed in the bottom cavity. The back door lock reinforcement plate 230 is used to install the back door lock, improve the rigidity of the back door lock, and improve the installation reliability of the back door lock. The back door lock reinforcement plate 230 is also connected to the rear enclosure inner plate 210 and the rear enclosure outer plate 220, thereby separating the bottom cavity. In this way, the back door lock reinforcement plate 230 is installed in the bottom wall cavity. On the one hand, the rigidity of the bottom frame assembly 200 is improved, and on the other hand, it avoids blocking the propagation of sound in the bottom cavity, avoids echoing, and improves the NVH performance of the vehicle.

[0064] In the embodiment of the present invention, a plurality of welding portions 231 are provided at both ends of the back door latch reinforcement plate 230 along the height direction of the vehicle to be welded and connected to the rear enclosure inner panel 210 and the rear enclosure outer panel 220 respectively.

[0065] Specifically, the back door lock reinforcement plate 230 is provided with welding parts 231 on the side close to the upper part of the vehicle and the side close to the lower part of the vehicle, respectively, so as to be welded and connected with the rear inner panel 210 and the rear outer panel 220. The provision of multiple welding parts 231 improves the connection reliability between the back door lock reinforcement plate 230 and the rear inner panel 210 and the rear outer panel 220.

[0066] In one embodiment, along the width direction of the vehicle, the back door lock reinforcement plate 230 is provided with support legs 232 on both sides, and the support legs 232 extend toward the rear outer panel 220 and overlap the rear outer panel 220. That is, the back door lock reinforcement plate 230 is provided with support legs 232 on the side facing the left side of the vehicle and the side facing the right side of the vehicle, and the support legs 232 extend toward the rear of the vehicle to overlap the rear outer panel 220. The support legs 232 and the rear outer panel 220 can be bonded by structural adhesive or spot welding.

[0067] In one embodiment, a leakage hole 233 is provided on the back door lock reinforcement plate 230, and the leakage hole 233 is used to allow electrophoresis liquid to flow between the rear inner panel 210 and the back door lock reinforcement plate 230. In the scheme shown in the figure of the utility model, the leakage hole 233 is set in the middle of the back door lock reinforcement plate 230. The setting of the leakage hole 233 facilitates the electrophoresis liquid to flow smoothly through the hole into the back door lock reinforcement plate 230 and the rear inner panel 210 during electrophoresis, so that the electrophoresis of the two fitting parts is more sufficient to improve the anti-corrosion performance. The back door lock reinforcement plate 230 connects the rear inner panel 210 and the rear outer panel 220 to transmit force. On the one hand, it improves the rigidity of the back door lock installation point. On the other hand, the back door lock reinforcement plate 230 can effectively isolate the bottom cavity to avoid echo generation, thereby improving NVH performance.

[0068] Please refer to Figure 2 and Figure 3 In an embodiment of the utility model, the side frame assembly 300 further includes a D-pillar 320, a D-pillar joint 330, a water trough 340 and a taillight mounting plate 350, and the two ends of the D-pillar 320 are respectively connected to the D-pillar lower bridge 310 and the D-pillar joint 330; along the height direction of the vehicle, the water trough 340 and the taillight mounting plate 350 are connected and covered on the D-pillar 320, the D-pillar lower bridge 310 and the D-pillar joint 330 to enclose a part of the side cavity; a water trough bracket 321 and a taillight mounting plate bracket 322 are installed on the D-pillar 320 at intervals, one side of the water trough bracket 321 is connected to the water trough 340 and the taillight mounting plate 350, and one side of the taillight mounting plate bracket 322 is connected to the taillight mounting plate 350; the water trough bracket 321 and the taillight mounting plate bracket 322 separate the side cavity.

[0069] Specifically, the D-pillar joint 330, the D-pillar 320 and the D-pillar lower bridge 310 are sequentially connected up and down along the height direction of the vehicle, and the D-pillar joint 330, the D-pillar 320 and the D-pillar lower bridge 310 constitute the inner plate of the side frame assembly 300. The water trough 340 and the taillight mounting plate 350 are sequentially connected up and down along the height direction of the vehicle, and the water trough 340 and the taillight mounting plate 350 constitute the outer plate of the side frame assembly 300. The water trough 340 is used to guide the liquid on the top of the vehicle to flow down, and the taillight mounting plate 350 is used for the vehicle taillight installation. The water trough 340 and the taillight mounting plate 350 are covered on part of the D-pillar joint 330, the D-pillar 320 and the D-pillar lower bridge 310, and enclose a part of the side cavity.

[0070] It can be understood that both the D-pillar joint 330 and the D-pillar lower bridge 310 have corners, so that both ends of the inner plate of the side frame assembly 300 have portions extending in the width direction of the vehicle, wherein the water trough 340 and the taillight mounting plate 350 only cover the portion of the inner plate of the side frame assembly 300 extending in the height direction of the vehicle (the water trough 340 also covers part of the corner of the D-pillar joint 330), and the portion of the inner plate of the side frame assembly 300 extending in the width direction of the vehicle is covered by the outer plate of the bottom frame assembly 200 and the outer plate of the top frame assembly 100. In order to clearly describe the back door frame structure, the cavity formed between the D-pillar joint 330, the D-pillar 320, the D-pillar lower bridge 310 and the structural members covered thereon is now defined as a side cavity.

[0071] A water trough bracket 321 and a taillight mounting plate bracket 322 are installed at intervals on the D-pillar 320. The water trough bracket 321 is also connected to the water trough 340 and the taillight mounting plate 350. In one embodiment, the water trough bracket 321 is connected to the D-pillar 320, the water trough 340, and the taillight mounting plate 350 by welding. The taillight mounting plate bracket 322 is also connected to the taillight mounting plate 350. In one embodiment, the taillight mounting plate bracket 322 is connected to the D-pillar 320 and the taillight mounting plate 350 by welding.

[0072] More specifically, if Fig. 9 As shown, the water trough bracket 321 is provided with a first connecting edge 3211 and a second connecting edge 3212, the first connecting edge 3211 is used to be spot-welded to the D-pillar 320, the second connecting edge 3212 is a three-layer welded connecting edge, and the second connecting edge is used to connect to the water trough 340 and the taillight mounting plate 350. The water trough bracket 321 is also provided with a reinforcing protrusion 3213 to enhance the structural strength of the water trough bracket 321. At the same time, the water trough bracket 321 is also provided with an opening 3214 to achieve a lightweight design.

[0073] like Fig.10 As shown, a first joint edge 3221 and a second joint edge 3222 are provided in the taillight mounting plate bracket 322. The first joint edge 3221 is used for spot welding connection with the D-pillar, and the second joint edge 3222 is used for spot welding connection with the taillight mounting plate 350. At the same time, a sink 3223 is also provided on the taillight mounting plate bracket 322, and the sink 3223 is used to increase the structural strength of the taillight mounting plate bracket 322. A weight reduction hole 3224 is also provided on the taillight mounting plate bracket 322 to achieve a lightweight design.

[0074] The arrangement of the water trough bracket 321 and the taillight mounting plate bracket 322 separates the side cavity, which, on the one hand, improves the rigidity of the side frame assembly 300, and on the other hand, avoids the propagation of sound in the side cavity and the generation of echoes, thereby improving NVH performance.

[0075] Please refer to Figure 2 and Figure 3 In an embodiment of the utility model, a back door stay rod reinforcement plate 331 and a back door hinge reinforcement plate 332 are installed on the D-pillar joint 330. The back door stay rod reinforcement plate 331 is used to install the back door stay rod, and the back door hinge reinforcement plate 332 is used to install the back door hinge.

[0076] Specifically, the portion of the D-pillar joint 330 extending in the vehicle height direction is installed with a back door strut reinforcement plate 331, and the portion of the D-pillar joint 330 extending in the vehicle width direction is installed with a back door hinge reinforcement plate 332. The back door strut reinforcement plate 331 is used to install the back door strut, thereby improving the installation reliability of the back door strut; the back door hinge reinforcement plate 332 is used to install the back door hinge, so as to improve the installation reliability of the back door hinge.

[0077] Please refer to Figure 7 and Figure 8 In an embodiment of the utility model, the top frame assembly 100 includes a rear cross beam inner plate 110, a rear cross beam outer plate 120 and a top cover outer plate 130, the two ends of the rear cross beam inner plate 110 are respectively connected to the two D-pillar joints 330, the rear cross beam outer plate 120 is covered on the rear cross beam inner plate 110, and the top cover outer plate 130 is covered on the rear cross beam outer plate 120, and the rear cross beam inner plate 110 and the rear cross beam outer plate 120 are enclosed to form a top cavity; a rear cross beam bracket 140 is installed on the rear cross beam inner plate 110, and the rear cross beam bracket 140 separates the top cavity.

[0078] Specifically, the left and right sides of the top frame assembly 100 are connected to the side frame assembly 300 respectively, and along the width direction of the vehicle, the two ends of the rear cross beam inner plate 110 are connected to the D-pillar joints 330 of the two side frame assemblies 300 respectively. The rear cross beam outer plate 120 is covered on the rear cross beam inner plate 110, and the top cover outer plate 130 is covered on the rear cross beam outer plate 120, thereby further improving the structural strength of the top frame assembly 100. A top cavity is formed between the rear cross beam inner plate 110 and the rear cross beam outer plate 120, and a rear cross beam bracket 140 is installed in the top cavity. The rear cross beam bracket 140 connects the rear cross beam inner plate 110 and the rear cross beam outer plate 120, thereby separating the top cavity. A first welding edge 141 is provided on the rear cross beam bracket 140, and the first welding edge 141 is a three-layer spot welding connection edge, which is used for welding with the rear cross beam inner plate 110 and the D-pillar joint 330. The rear cross beam bracket 140 is also provided with a second welding edge 142, and the second welding edge 142 is used for spot welding connection with the rear cross beam outer plate 120. The rear cross beam bracket 140 is also provided with a boss 143 to strengthen the structural strength of the rear cross beam bracket 140. The rear cross beam bracket 140 is also provided with a through hole 144, and the through hole 144 is used to fix the wiring harness buckle. The provision of the rear cross beam bracket 140 improves the rigidity of the top frame assembly 100, while also avoiding the propagation of sound in the top cavity, thereby avoiding echoes and improving the NVH performance of the vehicle. In one embodiment, in order to improve the force balance and rigidity of the top frame assembly 100, two rear cross beam brackets 140 are spaced apart in the top cavity.

[0079] Please refer to Figure 2 and Figure 3 In an embodiment of the utility model, a D-pillar joint reinforcement plate 360 ​​is also provided on the D-pillar joint 330, and the D-pillar joint reinforcement plate 360 ​​is connected to the rear cross beam outer plate 120 and the tailgate hinge reinforcement plate 332, and the top cover outer plate 130 and the water flow channel 340 are partially covered with the D-pillar joint reinforcement plate 360.

[0080] Specifically, in order to improve the structural strength of the D-pillar joint 330, a D-pillar joint reinforcement plate 360 ​​is also provided on the D-pillar joint 330. In the width direction of the vehicle, the D-pillar joint reinforcement plate 360 ​​is connected to the rear cross beam outer plate 120 and the back door hinge reinforcement plate 332. At the same time, the roof outer plate 130 also covers a portion of the D-pillar joint reinforcement plate 360 ​​along the width direction of the vehicle, and the water flow groove 340 also covers a portion of the D-pillar joint reinforcement plate 360 ​​along the height direction of the vehicle. In this way, the setting of multiple connection positions of the D-pillar joint reinforcement plate 360 ​​improves the installation reliability of the D-pillar joint reinforcement plate 360.

[0081] The utility model also proposes a vehicle, which includes a tailgate frame structure. The specific structure of the tailgate frame structure refers to the above-mentioned embodiments. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0082] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A back door frame structure, characterized in that: It comprises a top frame assembly, a bottom frame assembly and two side frame assemblies, wherein the top frame assembly, one side frame assembly, the bottom frame assembly and the other side frame assembly are connected end to end to form a closed ring structure; The side frame assembly includes a D-pillar lower bridge member, and a side cavity is formed in the side frame assembly; The bottom frame assembly includes a rear enclosure inner plate and a rear enclosure outer plate, wherein the rear enclosure outer plate is disposed on the rear enclosure inner plate, and a bottom cavity is formed between the two; The D-pillar lower bridge piece is connected to the rear enclosure inner panel, and the rear enclosure outer panel covers at least a portion of the D-pillar lower bridge piece. A rear enclosure bracket is installed at the corner of the D-pillar lower bridge piece, and the rear enclosure bracket is connected to the rear enclosure outer panel to separate the side cavity and the bottom cavity.

2. The back door frame structure according to claim 1, characterized in that: The rear enclosure bracket includes a first bracket and a second bracket connected to each other, wherein the first bracket extends in a width direction of the vehicle, and the second bracket extends in the same direction as a corner of the D-pillar lower bridge member.

3. The back door frame structure according to claim 2, characterized in that: The first bracket is provided with a first skirt, a second skirt and a third skirt, the first skirt is used to connect with the lower bridge member of the D-pillar, the second skirt is used to connect with the rear outer panel, and the third skirt is used to connect with the lower bridge member of the D-pillar and the second bracket.

4. The back door frame structure according to claim 2, characterized in that: The second bracket is provided with a first connecting portion and a plurality of second connecting portions, wherein the first connecting portion is used to be connected to the rear outer panel, and the plurality of second connecting portions are all used to be connected to the D-pillar lower bridge member, and one of the second connecting portions is also used to be connected to a luggage box hook.

5. The back door frame structure according to claim 1, characterized in that: A tailgate latch reinforcement plate is installed in the bottom cavity, and the tailgate latch reinforcement plate connects the rear enclosure inner plate and the rear enclosure outer plate to separate the bottom cavity.

6. The back door frame structure according to claim 5, characterized in that: Along the height direction of the vehicle, a plurality of welding portions are provided at both ends of the back door lock reinforcement plate to be respectively welded to the rear enclosure inner panel and the rear enclosure outer panel; and / or Along the width direction of the vehicle, support legs are respectively provided on both sides of the back door lock reinforcement plate, and the support legs extend toward the rear outer panel and overlap the rear outer panel; and / or The tailgate lock reinforcement plate is provided with a leakage hole, and the leakage hole is used for the swimming liquid to flow to between the rear enclosure inner plate and the tailgate lock reinforcement plate.

7. The back door frame structure according to claim 1, characterized in that: The side frame assembly further includes a D-pillar, a D-pillar joint, a water flow channel and a taillight mounting plate, and the two ends of the D-pillar are respectively connected to the D-pillar lower bridge member and the D-pillar joint; along the height direction of the vehicle, the water flow channel and the taillight mounting plate are connected and covered on the D-pillar, the D-pillar lower bridge member and the D-pillar joint to enclose part of the side cavity; A water trough bracket and a taillight mounting plate bracket are installed on the D-pillar at intervals, one side of the water trough bracket is connected to the water trough and the taillight mounting plate, and one side of the taillight mounting plate bracket is connected to the taillight mounting plate; the water trough bracket and the taillight mounting plate bracket separate the side cavity.

8. The back door frame structure according to claim 7, characterized in that: A back door stay rod reinforcement plate and a back door hinge reinforcement plate are installed on the D-pillar joint. The back door stay rod reinforcement plate is used to install the back door stay rod, and the back door hinge reinforcement plate is used to install the back door hinge.

9. The back door frame structure according to claim 8, characterized in that: The top frame assembly includes a rear cross beam inner plate, a rear cross beam outer plate and a top cover outer plate, the two ends of the rear cross beam inner plate are respectively connected to the two D-pillar joints, the rear cross beam outer plate is covered on the rear cross beam inner plate, the top cover outer plate is covered on the rear cross beam outer plate, and the rear cross beam inner plate and the rear cross beam outer plate are combined to form a top cavity; A rear cross beam bracket is installed on the inner plate of the rear cross beam, and the rear cross beam bracket partitions the top cavity.

10. The back door frame structure according to claim 9, characterized in that: The D-pillar joint is also covered with a D-pillar joint reinforcement plate, which is connected to the rear cross beam outer plate and the tailgate hinge reinforcement plate, and the top cover outer plate and the water flow channel are both partially covered with the D-pillar joint reinforcement plate.

11. A vehicle, characterized in that: It comprises a back door frame structure as claimed in any one of claims 1 to 10.

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