Rear floor frame structure and vehicle

Abstract

The application discloses a rear floor frame structure and a vehicle, and relates to the technical field of vehicle frames. The rear floor frame structure comprises a rear floor framework and a rear floor assembly mounted on the rear floor framework. The rear floor framework comprises a rear floor framework subassembly and a rear quarter panel assembly connected to the rear side of the rear floor framework subassembly. The rear floor framework subassembly comprises two first rear longitudinal beams arranged oppositely and a plurality of rear floor cross beams arranged at intervals along the front-rear direction and connected between the two first rear longitudinal beams. The rear quarter panel assembly comprises a rear quarter panel cross beam, two second rear longitudinal beams connected to the rear quarter panel cross beam and connected to the rear ends of the two first rear longitudinal beams respectively, and a rear quarter panel connected to the upper end of the rear quarter panel cross beam. The rear floor frame structure according to the embodiment of the application can reduce the number of welding points on the assembly line, improve the production efficiency of the vehicle assembly line, and improve the production efficiency of the whole vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more particularly to a rear floor frame structure and a vehicle. Background Technology

[0002] In related technologies, the rear floor frame structure includes a rear floor skeleton, a rear floor assembly, and a rear bulkhead assembly. The rear floor skeleton includes two rear longitudinal beams spaced apart on the left and right sides and multiple crossbeams arranged in the front-to-back direction. During vehicle assembly, the rear floor assembly is welded to the rear floor skeleton on the final assembly line, and then the rear bulkhead assembly is welded together with the last side crossbeam and the two rear longitudinal beams of the rear floor skeleton.

[0003] However, this assembly method results in more weld points on the final assembly line, leading to lower production efficiency. This is especially true between the rear bulkhead assembly and the last side beam of the rear floor frame. Because the rear bulkhead assembly and the last side beam are connected via a surface and cavity, the length of the mating section in the left-right direction between them is relatively long, resulting in numerous weld points. Welding the rear bulkhead assembly to the last side beam is time-consuming and significantly impacts the production efficiency of the final assembly line. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a rear floor frame structure that, while ensuring the connection strength between the rear bulkhead and the rear bulkhead crossbeam and the second rear longitudinal beam, reduces the number of welding points on the final assembly line, thereby improving the production efficiency of the vehicle's final assembly line and the overall vehicle production efficiency.

[0005] The present invention also proposes a vehicle having the aforementioned rear floor frame structure.

[0006] According to a first aspect of the present invention, a rear floor frame structure includes: a rear floor skeleton, the rear floor skeleton including a rear floor skeleton sub-assembly and a rear panel assembly, the rear panel assembly being connected to the rear side of the rear floor skeleton sub-assembly, the rear floor skeleton sub-assembly including a first rear longitudinal beam and a rear floor crossbeam, the first rear longitudinal beam being two beams arranged opposite each other from left to right, the rear floor crossbeams being a plurality of beams spaced apart from each other in a front-rear direction, the rear floor crossbeams being connected between two of the first rear longitudinal beams, the rear panel assembly including a rear panel, a second rear longitudinal beam and a rear panel crossbeam, the rear panel crossbeam being connected to the lower end of the rear panel, the second rear longitudinal beam being two beams arranged opposite each other from left to right, the rear ends of the two second rear longitudinal beams being connected to the rear panel crossbeams, and the front ends of the two second rear longitudinal beams being respectively connected to the rear ends of the two first rear longitudinal beams to assemble and connect the rear panel assembly and the rear floor skeleton sub-assembly; and a rear floor assembly, the rear floor assembly being installed on the rear floor skeleton and connected to the rear floor skeleton sub-assembly and the second rear longitudinal beams.

[0007] According to the rear floor frame structure of the present invention, by setting a second rear longitudinal beam, the rear bulkhead, the second rear longitudinal beam, and the rear bulkhead crossbeam are integrated into a rear bulkhead assembly. On the final assembly line, the rear bulkhead assembly is connected to the rear floor frame sub-assembly via the second rear longitudinal beam. Under the condition of ensuring the connection strength between the rear bulkhead and the rear bulkhead crossbeam and the second rear longitudinal beam, the number of welding points on the final assembly line can be reduced, thereby improving the production efficiency of the vehicle's final assembly line and the overall production efficiency of the vehicle.

[0008] According to some embodiments of the present invention, the first rear longitudinal beam includes a first rear beam body and a first connecting flange connected to the left and right sides of the first rear beam body. A mating groove is defined in the first rear beam body. The second rear longitudinal beam includes a second rear beam body and a second connecting flange connected to the left and right sides of the second rear beam body. The front end of the second rear beam body is accommodated in the mating groove. The second connecting flange is stacked on the upper surface of the first connecting flange.

[0009] In some embodiments of the present invention, the rear panel has a first cavity, the rear panel crossbeam has a second cavity, and the second cavity is located below the first cavity.

[0010] In some embodiments of the present invention, the lower side of the first cavity is open, the upper side of the second cavity is open, and the first cavity and the second cavity are connected through the open side.

[0011] According to some embodiments of the present invention, the length of the first rear longitudinal beam is greater than the length of the second rear longitudinal beam; and / or, the cross-sectional area of ​​the first rear longitudinal beam is greater than the cross-sectional area of ​​the second rear longitudinal beam.

[0012] According to some embodiments of the present invention, the rear floor assembly has a battery mounting portion for mounting a battery, the battery mounting portion being adjacent to the connection position of the first rear longitudinal beam and the second rear longitudinal beam.

[0013] In some embodiments of the present invention, the plurality of rear floor crossbeams include a first rear floor crossbeam, a second rear floor crossbeam, a third rear floor crossbeam, and a fourth rear floor crossbeam arranged sequentially from front to back. The first rear floor crossbeam has fuel tank mounting points at its left and right ends, the second rear floor crossbeam has tow arm mounting points at its left and right ends, and the third and fourth rear floor crossbeams each have subframe mounting points at their left and right ends.

[0014] In some embodiments of the present invention, the first rear floor crossbeam and the second rear floor crossbeam have second-row seat mounting points, and the third rear floor crossbeam and the fourth rear floor crossbeam have third-row seat mounting points.

[0015] In some embodiments of the present invention, the distance between the first rear floor crossbeam and the second rear floor crossbeam ranges from 385 to 415 mm, the distance between the second rear floor crossbeam and the third rear floor crossbeam ranges from 290 to 310 mm, the distance between the third rear floor crossbeam and the fourth rear floor crossbeam ranges from 328 to 352 mm, and the distance between the fourth rear floor crossbeam and the rear panel crossbeam ranges from 545 to 585 mm.

[0016] According to some alternative embodiments of the invention, the rear portion of the rear floor is recessed downwards to form a storage pit.

[0017] According to some optional embodiments of the present invention, the rear floor frame sub-assembly further includes a sliding door sill connected to the first rear longitudinal beam, wherein the sliding door stop of the sliding door sill is not higher than 275mm above the ground, and the sliding door sill trim is not higher than 353mm above the ground.

[0018] According to some optional embodiments of the present invention, the rear panel assembly further includes a rear sill trim panel, the rear sill trim panel being disposed on the rear panel and forming a rear sill with the rear panel, the ground clearance of the rear sill stop of the rear panel not exceeding 632mm, and the ground clearance of the rear sill trim panel of the rear sill not exceeding 680mm.

[0019] A vehicle according to a second aspect of the present invention includes: a rear floor frame structure according to the first aspect of the present invention described above.

[0020] According to embodiments of the present invention, by providing the aforementioned rear floor frame structure, the production efficiency of the vehicle's final assembly line can be improved, thereby increasing the overall production efficiency of the vehicle.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a perspective view of the rear floor frame structure according to some embodiments of the present invention;

[0024] Figure 2 yes Figure 1 Enlarged view of a portion of the rear floor frame structure;

[0025] Figure 3 yes Figure 1 Top view of the rear floor frame structure;

[0026] Figure 4 yes Figure 1 A cross-sectional schematic diagram of the rear floor frame structure;

[0027] Figure 5 yes Figure 1 A bottom view of the rear floor frame structure;

[0028] Figure 6 yes Figure 5 Enlarged view of a portion of the rear floor frame structure;

[0029] Figure 7 yes Figure 5 A structural diagram of another part of the rear floor frame structure;

[0030] Figure 8 yes Figure 5 A three-dimensional view of the rear floor frame;

[0031] Figure 9 yes Figure 8 Exploded view of the rear floor frame;

[0032] Figure 10 yes Figure 5 A three-dimensional view of the rear floor frame sub-assembly.

[0033] Figure 11 yes Figure 5 A perspective view of the rear panel assembly.

[0034] Figure 12 yes Figure 11 Side view of the rear bulkhead assembly;

[0035] Figure 13 yes Figure 11 A cross-sectional schematic diagram of the rear panel assembly;

[0036] Figure 14 yes Figure 1 A structural diagram of a portion of the side sill.

[0037] Figure 15 yes Figure 1 A cross-sectional view of the side sill in the middle;

[0038] Figure 16 yes Figure 1 A top view of the floor in the middle;

[0039] Figure 17 yes Figure 1 Top view of the rear floor.

[0040] Figure label:

[0041] 100. Rear floor frame structure;

[0042] 10. Rear floor frame;

[0043] 1. Rear floor frame sub-assembly;

[0044] 11. First rear longitudinal beam; 111. Main body of the first rear beam; 112. First connecting flange; 113. Mating groove; 114. Fuel tank mounting point; 115. Trailing arm mounting point; 116. Subframe mounting point;

[0045] 121. First rear floor beam; 122. Second rear floor beam; 123. Third rear floor beam; 124. Fourth rear floor beam;

[0046] 13. Sliding door threshold; 131. Sliding door stop; 132. Sliding door threshold trim panel;

[0047] 2. Rear bulkhead assembly; 21. Rear bulkhead; 211. First cavity; 212. Tail sill stop; 22. Second rear longitudinal beam; 221. Second rear beam body; 222. Second connecting flange; 223. Structural groove; 23. Rear bulkhead crossbeam; 231. Second cavity; 24. Tail sill trim panel; 25. Rear bumper beam;

[0048] 20. Rear floor assembly;

[0049] 3. Rear floor; 31. Battery mounting section; 32. Storage pit;

[0050] 4. Middle floor. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0052] The rear floor frame structure 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0053] Reference Figures 1-5 , Figure 16 and Figure 17 According to a first aspect embodiment of the present invention, a rear floor frame structure 100 is used in a vehicle, the vehicle further comprising a front floor frame structure and an upper body structure, the rear floor frame structure 100 being connected to the front floor frame structure, the front floor frame structure supporting the front seats of the vehicle, and the rear floor frame structure 100 supporting the rear seats of the vehicle (when the vehicle has a three-row seat structure, the rear seats refer to the second and third rows of seats), the upper body structure being supported and connected to the rear floor frame structure 100 and the front floor frame structure, the upper body structure, the rear floor frame structure 100 and the front floor frame structure together defining the interior space of the vehicle.

[0054] The rear floor frame structure 100 includes a rear floor skeleton 10 and a rear floor assembly 20. The rear floor skeleton 10 includes a rear floor skeleton sub-assembly 1 and a rear bulkhead assembly 2. The rear bulkhead assembly 2 is connected to the rear side of the rear floor skeleton sub-assembly 1. The rear floor skeleton sub-assembly 1 includes two first rear longitudinal beams 11 arranged opposite each other on the left and right sides, and multiple rear floor crossbeams are spaced apart along the front-rear direction. The rear floor crossbeams connect the two first rear longitudinal beams 11. The multiple rear floor crossbeams make the rear floor skeleton 10 structurally strong, resulting in better bending and torsional performance of the vehicle body, thereby ensuring the overall performance of the vehicle.

[0055] It should be explained that, in the description of this invention, "a plurality of" means two or more.

[0056] The rear panel assembly 2 includes a rear panel 21, a second rear longitudinal beam 22, and a rear panel crossbeam 23. The rear panel crossbeam 23 is connected to the lower end of the rear panel 21. There are two second rear longitudinal beams 22 arranged opposite each other on the left and right sides. The rear ends of the two second rear longitudinal beams 22 are connected to the rear panel crossbeam 23. The front ends of the two second rear longitudinal beams 22 are respectively connected to the rear ends of the two first rear longitudinal beams 11 to assemble and connect the rear panel assembly 2 and the rear floor frame sub-assembly 1.

[0057] The second rear longitudinal beam 22 is welded to the first rear longitudinal beam 11. The rear floor assembly 20 is installed on the rear floor frame 10 and is connected to the rear floor frame sub-assembly 1 and the second rear longitudinal beam 22. When the rear of the vehicle is impacted, the rear panel assembly 2 can absorb the collision energy and ensure the safety of the occupants.

[0058] When assembling a vehicle, the rear floor frame sub-assembly 1 and the rear bulkhead assembly 2 can be processed and formed separately on the sub-assembly line. Then, the rear floor frame sub-assembly 1 and the rear bulkhead assembly 2 are connected together on the vehicle's final assembly line to form the rear floor frame 10. Next, the rear floor assembly 20 is installed on the rear floor frame 10 to form the rear floor frame structure 100.

[0059] The rear panel 21, the second rear longitudinal beam 22, and the rear panel crossbeam 23 are integrated into the rear panel assembly 2. The rear panel assembly 2 is connected to the rear floor frame sub-assembly 1 via the second rear longitudinal beam 22 on the final assembly line. This reduces the number of welding points on the final assembly line, improves the production efficiency of the vehicle's final assembly line, and increases the overall production efficiency of the vehicle.

[0060] On the assembly line, the rear ends of the two second rear longitudinal beams 22 can be connected to the rear bulkhead crossbeam 23 first, and then the rear bulkhead 21 can be connected to the upper end of the rear bulkhead crossbeam 23. The rear bulkhead 21, the rear bulkhead crossbeam 23, and the second rear longitudinal beams 22 can be welded together. This can also ensure the connection strength between the rear bulkhead 21, the rear bulkhead crossbeam 23, and the second rear longitudinal beams 22, and ensure the overall strength of the rear floor frame structure 100, thereby meeting the vehicle body's requirements for bending and torsional performance and ensuring the overall performance of the vehicle.

[0061] For example, the rear panel assembly 2 may also include a rear bumper beam 25, which is connected to the rear side of the rear panel 21. The rear bumper beam 25 protrudes rearward from the rear panel 21 and also protrudes rearward from the rear door of the vehicle. When the rear of the vehicle is impacted, the rear bumper beam 25 can withstand the impact and then transfer the collision force to the rear panel 21, which absorbs the collision energy and prevents the rear door from being hit, thus preventing a large amount of collision energy from being transferred to the occupants. This allows the rear panel 21 to effectively absorb the collision energy of the vehicle, ensuring the personal safety of the occupants, improving the reliability of the rear panel assembly 2, and improving the safety performance of the vehicle.

[0062] For example, the rear floor assembly 20 may include a middle floor 4 and a rear floor 3, which are arranged in a front-to-back direction. The middle floor 4 is connected to the rear floor frame sub-assembly 1, and the rear floor 3 is connected to the rear floor frame sub-assembly 1 and the second rear longitudinal beam 22. This divides the rear floor assembly 20 into two parts, which facilitates the manufacturing and production of the middle floor 4 and the rear floor 3, and facilitates the transfer, transportation, and assembly of the middle floor 4 and the rear floor 3 during the production process, thereby improving production efficiency and reducing production costs.

[0063] According to some embodiments of the present invention, the second rear longitudinal beam 22 is welded to the first rear longitudinal beam 11. The welded connection is simple, structurally reliable, and can improve the connection strength between the second rear longitudinal beam 22 and the first rear longitudinal beam 11, thereby increasing the structural strength of the rear floor frame 10 and improving the vehicle's bending and torsional performance. Furthermore, the welded connection method adds minimal weight to the rear floor frame 10, achieving a lightweight design while maintaining its structural strength.

[0064] Reference Figures 5-9 According to some embodiments of the present invention, the length of the first rear longitudinal beam 11 is greater than the length of the second rear longitudinal beam 22. The longer first rear longitudinal beam 11 can make the structural strength of the rear floor frame 10 higher, effectively ensuring the overall structural strength of the vehicle body, ensuring the bending and torsional performance of the vehicle body, and ensuring the overall performance of the vehicle.

[0065] Reference Figures 5-9 According to some embodiments of the present invention, the cross-sectional area of ​​the first rear longitudinal beam 11 is larger than that of the second rear longitudinal beam 22. The larger cross-sectional area of ​​the first rear longitudinal beam 11 can ensure that the rear floor frame assembly has sufficient structural strength, ensure the overall structural strength of the vehicle body, ensure the bending and torsional performance of the vehicle body, and ensure the overall performance of the vehicle.

[0066] Reference Figures 5-9 According to some embodiments of the present invention, the second rear longitudinal beam 22 overlaps with the first rear longitudinal beam 11. This facilitates the docking of the second rear longitudinal beam 22 and the first rear longitudinal beam 11, and facilitates the assembly of the rear bulkhead assembly 2 and the rear floor frame sub-assembly 1, thereby improving assembly efficiency and the overall production efficiency of the vehicle. The overlapping connection method allows for a larger contact area between the second rear longitudinal beam 22 and the first rear longitudinal beam 11, resulting in higher structural strength at the overlap and a more reliable connection between them. Furthermore, it further enhances the structural strength of the rear floor frame 10 and improves the vehicle's bending and torsional performance.

[0067] Reference Figures 5-9According to some embodiments of the present invention, the first rear longitudinal beam 11 includes a first rear beam body 111 and a first connecting flange 112, the first connecting flange 112 being connected to the left and right sides of the first rear beam body 111, and a mating groove 113 being defined within the first rear beam body 111. The second rear longitudinal beam 22 includes a second rear beam body 221 and a second connecting flange 222, the second connecting flange 222 being connected to the left and right sides of the second rear beam body 221, the front end of the second rear beam body 221 being accommodated within the mating groove 113, and the second connecting flange 222 being stacked on the upper surface of the first connecting flange 112. The first rear beam body 111 and the second rear beam body 221 are welded together, and the first connecting flange 112 and the second connecting flange 222 are also welded together.

[0068] By accommodating the front end of the second rear beam body 221 in the mating groove 113 and placing the second connecting flange 222 on the upper surface of the first connecting flange 112, the contact area between the first rear longitudinal beam 11 and the second rear longitudinal beam 22 can be increased, thereby improving the structural strength of the overlap between the second rear longitudinal beam 22 and the first rear longitudinal beam 11 and making the connection between the first rear longitudinal beam 11 and the second rear longitudinal beam 22 more reliable. Moreover, it can further improve the structural strength of the rear floor frame 10 and improve the bending and torsional performance of the vehicle body.

[0069] The front end of the second rear longitudinal beam 22 is accommodated in the mating groove 113 of the first rear longitudinal beam 11. The cross-sectional area of ​​the first rear longitudinal beam 11 is larger than that of the second rear longitudinal beam 22. The larger cross-sectional area can give the first rear longitudinal beam 11 sufficient structural strength, ensuring that the rear floor frame structure 100 has sufficient structural strength, ensuring the overall structural strength of the vehicle body, ensuring the bending and torsional performance of the vehicle body, and ensuring the overall performance of the vehicle.

[0070] Reference Figure 4 and Figure 13 According to some optional embodiments of the present invention, the rear panel assembly 2 further includes a rear sill trim 24, which is disposed on the rear panel 21, and the rear panel 21 and the rear sill trim 24 form a rear sill. The ground clearance of the rear sill stop 212 of the rear panel 21 is no higher than 632 mm, and the ground clearance of the rear sill trim 24 is no higher than 680 mm. This allows for a smaller vertical height difference between the rear sill trim 24 and the rear floor assembly 20, resulting in a lower ground clearance for the rear sill, making it easier for users to load and unload luggage.

[0071] Reference Figure 13In some embodiments of the present invention, the rear bulkhead 21 has a first cavity 211, and the rear bulkhead crossbeam 23 has a second cavity 231, which is located below the first cavity 211. This allows both the rear bulkhead 21 and the rear bulkhead crossbeam 23 to have a certain energy absorption effect, further improving the energy absorption effect of the rear bulkhead assembly 2 when the rear of the vehicle is impacted, thus more effectively ensuring the personal safety of the occupants and improving the overall safety performance of the vehicle.

[0072] Reference Figure 13 In some embodiments of the present invention, the lower side of the first cavity 211 is open, and the upper side of the second cavity 231 is open, with the first cavity 211 and the second cavity 231 connected through the open side. This cavity connection allows for a more reliable connection between the rear bulkhead 21 and the rear bulkhead crossbeam 23. Simultaneously, the rear bulkhead assembly 2 has a large energy-absorbing cavity, enabling it to more effectively absorb the collision energy of the vehicle, further ensuring the personal safety of the occupants and improving the vehicle's safety performance.

[0073] For example, the second rear longitudinal beam 22 has a structural groove 223, which connects to the mating groove 113 and the second cavity 231. The cavity is connected to each other, which can improve the structural strength of the rear floor frame 10, improve the bending and torsional performance of the vehicle body, and improve the overall performance of the vehicle.

[0074] By setting the structural groove 223, the second rear longitudinal beam 22 can also have a certain energy absorption function. When the length of the rear floor frame 10 is fixed, by setting the second rear longitudinal beam 22, the second rear longitudinal beam 22 can collapse and absorb energy, increasing the collapse and energy absorption space of the rear panel assembly 2, thereby enabling the rear panel assembly 2 to better absorb the collision energy of the vehicle body, more effectively ensuring the personal safety of the occupants and improving the safety performance of the vehicle.

[0075] Reference Figures 1-3 , Figures 5-7 , Figure 16 and Figure 17 According to some embodiments of the present invention, the rear floor assembly 20 has a battery mounting portion 31 for mounting a battery, for example, the battery can be detachably mounted to the rear floor assembly 20 by fastening bolts, the battery mounting portion 31 being adjacent to the connection position of the first rear longitudinal beam 11 and the second rear longitudinal beam 22.

[0076] The connection between the first rear longitudinal beam 11 and the second rear longitudinal beam 22 has high structural strength, resulting in minimal deformation at this connection point when the rear of the vehicle is impacted. Positioning the battery mounting section 31 adjacent to the connection point of the first rear longitudinal beam 11 and the second rear longitudinal beam 22 reduces or prevents damage to the battery caused by energy absorption from the collapse of the rear bulkhead assembly 2, thus enhancing battery protection and effectively ensuring battery safety.

[0077] Reference Figure 5 , Figures 8-10 In some embodiments of the present invention, the plurality of rear floor crossbeams include a first rear floor crossbeam 121, a second rear floor crossbeam 122, a third rear floor crossbeam 123, and a fourth rear floor crossbeam 124 arranged sequentially from front to back. The first rear floor crossbeam 121 has fuel tank mounting points 114 at its left and right ends, the second rear floor crossbeam 122 has tow arm mounting points 115 at its left and right ends, and the third rear floor crossbeam 123 and the fourth rear floor crossbeam 124 each have subframe mounting points 116 at their left and right ends. The fuel tank mounting points 114 are used to mount the fuel tank, the tow arm mounting points 115 are used to mount and connect the tow arm, and the subframe mounting points 116 are used to mount and connect the subframe.

[0078] For example, each first rear longitudinal beam 11 has a fuel tank mounting point 114, a trailing arm mounting point 115, and two subframe mounting points 116; the fuel tank mounting point 114 is opposite to the first rear floor crossbeam 121 in the left-right direction, the trailing arm mounting point 115 is opposite to the second rear floor crossbeam 122 in the left-right direction, and the two subframe mounting points 116 are opposite to the third rear floor crossbeam 123 and the fourth rear floor crossbeam 124 in the left-right direction, respectively.

[0079] The connection between the first rear longitudinal beam 11 and the rear floor crossbeam has high structural strength and small deformation under stress. Positioning the fuel tank mounting point 114 at both ends of the first rear floor crossbeam 121 allows for stable and reliable fixing of the fuel tank to the lower part of the rear floor frame structure 100. Positioning the trailing arm mounting point 115 at both ends of the second rear floor crossbeam 122, and the subframe mounting point 116 at both ends of the third and fourth rear floor crossbeams 123 and 124, ensures a more reliable connection between the trailing arm and subframe and the rear floor frame structure 100. This allows the trailing arm and subframe to reliably support the rear floor frame structure 100, ensuring the vehicle's bending and torsional performance and overall vehicle performance.

[0080] By setting fuel tank mounting points 114, trailing arm mounting points 115, and subframe mounting points 116 at both ends of multiple rear floor crossbeams, the structural strength requirements of fuel tank mounting points 114, trailing arm mounting points 115, and subframe mounting points 116 can be met. The layout is reasonable and can ensure the structural strength of the rear floor frame structure 100 and the bending and torsional performance of the whole vehicle. At the same time, it can reduce the number of rear floor crossbeams, reduce the weight of the rear floor frame structure 100, and achieve vehicle lightweighting.

[0081] Reference Figure 5 , Figures 8-10In some embodiments of the present invention, the first rear floor crossbeam 121 and the second rear floor crossbeam 122 have second-row seat mounting points for connecting and supporting the second-row seats. The third rear floor crossbeam 123 and the fourth rear floor crossbeam 124 have third-row seat mounting points for connecting and supporting the third-row seats. Mounting the second-row seats on the first rear floor crossbeam 121 and the second rear floor crossbeam 122, and mounting the third-row seats on the third rear floor crossbeam 123 and the fourth rear floor crossbeam 124, satisfies the structural strength requirements of the second and third-row seats for the rear floor frame structure 100.

[0082] This allows for full utilization of the first rear floor crossbeam 121, the second rear floor crossbeam 122, the third rear floor crossbeam 123, and the fourth rear floor crossbeam 124, resulting in a more rational layout of multiple rear floor crossbeams. It eliminates the need for separate rear floor crossbeams to support the second and third rows of seats, thus reducing the number of rear floor crossbeams, lowering the weight of the rear floor frame structure 100, and achieving vehicle lightweighting.

[0083] Reference Figure 5 , Figures 8-10 In some embodiments of the present invention, the distance between the first rear floor beam 121 and the second rear floor beam 122 is 385-415 mm, the distance between the second rear floor beam 122 and the third rear floor beam 123 is 290-310 mm, the distance between the third rear floor beam 123 and the fourth rear floor beam 124 is 318-352 mm, and the distance between the fourth rear floor beam 124 and the rear panel beam 23 is 545-585 mm.

[0084] The reasonable spacing effectively ensures the structural strength of the rear floor frame 10, meeting the structural strength requirements of the fuel tank mounting point 114, the trailing arm mounting point 115, the subframe mounting point 116, and the support for the second and third row seats on the rear floor frame structure 100. The reasonable layout ensures the structural strength of the rear floor frame structure 100 and guarantees the bending and torsional performance of the entire vehicle. Moreover, the number of rear floor crossbeams is relatively small, which can achieve vehicle weight reduction.

[0085] Reference Figures 1-4 , Figure 16 and Figure 17 According to some optional embodiments of the present invention, the rear portion of the rear floor assembly 20 is recessed downwards to form a storage pit 32, for example, the rear floor 3 is recessed downwards to form a storage pit 32. This can increase the vehicle's storage space, improve the overall space utilization of the vehicle, meet users' requirements for large storage space, and improve the overall performance of the vehicle.

[0086] Reference Figure 1 , Figure 3 , Figure 5 , Figures 8-10 , Figure 14 and Figure 15 According to some optional embodiments of the present invention, the rear floor frame sub-assembly 1 further includes a sliding door sill 13, which is connected to the first rear longitudinal beam 11. The sliding door stop 131 of the sliding door sill 13 has a ground clearance of no more than 275 mm; the sliding door sill trim 132 of the sliding door sill 13 has a ground clearance of no more than 353 mm. A sliding track is provided between the sliding door sill trim 132 and the sliding door stop 131, and the sliding door is adapted to slide along the sliding track.

[0087] When a user gets into the vehicle, the user can step on the sliding door sill trim 132 and then enter the vehicle through the sliding door sill trim 132; when a user gets out of the vehicle, the user can step on the sliding door sill trim 132 and then get off the vehicle through the sliding door sill trim 132 onto the ground.

[0088] The sliding door sill trim 132 can serve as a secondary step, providing support for the user when getting in and out of the vehicle, making it easier for the user to get in and out of the vehicle; moreover, the height of the sliding door sill trim 132 is set to no more than 353mm, which is relatively low and makes it easier for the user to get in and out of the vehicle.

[0089] The height of the sliding door stop 131 from the ground is set to no more than 275mm, and the height of the sliding door sill trim 132 is set to no more than 353mm. The lower height of the sliding door sill 13 can lower the center of gravity of the sliding door sill 13, lower the center of gravity of the vehicle body, and improve the overall performance of the vehicle.

[0090] A vehicle according to a second aspect embodiment of the present invention includes: a rear floor frame structure 100 according to the first aspect embodiment of the present invention described above. For example, the vehicle may be an automobile.

[0091] For example, in a vehicle without a spare tire configuration, the rear portion of the rear floor assembly is recessed downwards to form a storage pit 32. This eliminates the need for a rear floor crossbeam for mounting a spare tire, reducing the weight of the rear floor frame structure 100, achieving vehicle lightweighting, increasing vehicle storage space, improving overall vehicle space utilization, meeting users' demands for large storage space, and enhancing overall vehicle performance.

[0092] According to an embodiment of the present invention, by providing the aforementioned rear floor frame structure 100, the production efficiency of the vehicle's final assembly line can be improved, thereby increasing the overall production efficiency of the vehicle.

[0093] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rear floor frame structure, characterized in that, include: The rear floor frame includes a rear floor frame sub-assembly and a rear panel assembly. The rear panel assembly is connected to the rear side of the rear floor frame sub-assembly. The rear floor frame sub-assembly includes a first rear longitudinal beam and a rear floor crossbeam. The first rear longitudinal beam consists of two beams arranged opposite each other from left to right. The rear floor crossbeam consists of multiple beams spaced apart from each other in the front-rear direction. The rear floor crossbeam is connected between two of the first rear longitudinal beams. The rear panel assembly includes a rear panel, a second rear longitudinal beam, and a rear panel crossbeam. The rear panel crossbeam is connected to the lower end of the rear panel. The second rear longitudinal beam consists of two beams arranged opposite each other from left to right. The rear ends of the two second rear longitudinal beams are connected to the rear panel crossbeams. The front ends of the two second rear longitudinal beams are respectively connected to the rear ends of the two first rear longitudinal beams to assemble and connect the rear panel assembly and the rear floor frame sub-assembly. The rear floor assembly is mounted on the rear floor frame and connected to the rear floor frame sub-assembly and the second rear longitudinal beam.

2. The rear floor frame structure according to claim 1, characterized in that, The first rear longitudinal beam includes a first rear beam body and a first connecting flange connected to the left and right sides of the first rear beam body. A mating groove is defined in the first rear beam body. The second rear longitudinal beam includes a second rear beam body and a second connecting flange connected to the left and right sides of the second rear beam body. The front end of the second rear beam body is accommodated in the mating groove. The second connecting flange is stacked on the upper surface of the first connecting flange.

3. The rear floor frame structure according to claim 1, characterized in that, The rear panel has a first cavity, and the rear panel crossbeam has a second cavity, the second cavity being located below the first cavity.

4. The rear floor frame structure according to claim 3, characterized in that, The lower side of the first cavity is open, and the upper side of the second cavity is open. The first cavity and the second cavity are connected through the open side.

5. The rear floor frame structure according to claim 1, characterized in that, The length of the first rear longitudinal beam is greater than the length of the second rear longitudinal beam; and / or, the cross-sectional area of ​​the first rear longitudinal beam is greater than the cross-sectional area of ​​the second rear longitudinal beam.

6. The rear floor frame structure according to claim 1, characterized in that, The rear floor assembly has a battery mounting section for installing a battery, the battery mounting section being adjacent to the connection point of the first rear longitudinal beam and the second rear longitudinal beam.

7. The rear floor frame structure according to claim 1, characterized in that, The plurality of rear floor crossbeams include a first rear floor crossbeam, a second rear floor crossbeam, a third rear floor crossbeam, and a fourth rear floor crossbeam arranged sequentially from front to back. The first rear floor crossbeam has fuel tank mounting points at both its left and right ends, the second rear floor crossbeam has tow arm mounting points at both its left and right ends, and the third and fourth rear floor crossbeams each have subframe mounting points at both its left and right ends.

8. The rear floor frame structure according to claim 7, characterized in that, The first and second rear floor crossbeams have second-row seat mounting points, and the third and fourth rear floor crossbeams have third-row seat mounting points.

9. The rear floor frame structure according to claim 7, characterized in that, The distance between the first rear floor crossbeam and the second rear floor crossbeam ranges from 385 to 415 mm, the distance between the second rear floor crossbeam and the third rear floor crossbeam ranges from 290 to 310 mm, the distance between the third rear floor crossbeam and the fourth rear floor crossbeam ranges from 328 to 352 mm, and the distance between the fourth rear floor crossbeam and the rear panel crossbeam ranges from 545 to 585 mm.

10. The rear floor frame structure according to any one of claims 1-9, characterized in that, The rear portion of the rear floor is recessed downwards to form a storage pit.

11. The rear floor frame structure according to any one of claims 1-9, characterized in that, The rear floor frame sub-assembly also includes a sliding door sill connected to the first rear longitudinal beam. The sliding door stop of the sliding door sill is no higher than 275mm from the ground, and the sliding door sill trim is no higher than 353mm from the ground.

12. The rear floor frame structure according to any one of claims 1-9, characterized in that, The rear panel assembly also includes a rear sill trim panel, which is disposed on the rear panel and forms a rear sill with the rear panel. The ground clearance of the rear sill stop of the rear panel is not higher than 632mm, and the ground clearance of the rear sill trim panel is not higher than 680mm.

13. A vehicle, characterized in that, include: The rear floor frame structure according to any one of claims 1-12.

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