Rear floor assembly for vehicle

Abstract

The present invention provides a rear floor assembly for a vehicle, in a structure thereof, a pair of side members are connected to a first cross member and a second cross member, and both the first cross member and the second cross member are connected to each other by a connection reinforcement, thereby being able to reinforce an overall skeleton structure of the rear floor assembly, improve side collision performance (crashworthiness) and passenger protection performance.

Description

Technical Field

[0001] This invention relates to a rear floor assembly for vehicles. Background Technology

[0002] With increasing attention to environmentally friendly vehicles, the use of electric vehicles that use high-voltage batteries as their power source is on the rise.

[0003] The floor that forms the interior of the vehicle may include a front floor and a rear floor, and the high-voltage battery may be installed such that the high-voltage battery is located on the rear floor.

[0004] Therefore, the frame structure of the rear floor where the high-voltage battery is installed needs to be strengthened. In particular, a structure capable of effectively handling side collisions is required.

[0005] The foregoing content is only for the purpose of helping to understand the background of the present invention, and should not be considered as falling within the scope of related technologies that are known, commonly used, or in use. Summary of the Invention

[0006] This invention relates to rear floor assemblies for vehicles. More specifically, this invention relates to a rear floor assembly for vehicles capable of improving side-impact performance (crashworthiness) by strengthening its skeletal structure.

[0007] Therefore, embodiments of the present invention aim to solve the aforementioned problems existing in the related art. Embodiments of the present invention can provide a rear floor assembly for a vehicle that can strengthen the skeleton structure of the rear floor assembly through the connection structure between longitudinal beams and transverse members, as well as the internal closed-section structure of the longitudinal beams and transverse members, thereby improving side-impact performance (crashworthiness) and passenger protection performance.

[0008] Embodiments of the present invention provide a rear floor assembly for a vehicle that ensures a load transfer path for collision energy and applies connecting structures between the load transfer paths to effectively disperse collision energy, thereby strengthening the vehicle body's skeletal structure.

[0009] According to an embodiment of the present invention, a rear floor assembly for a vehicle may include: a rear floor panel; a pair of longitudinal beams connected to the rear floor panel and configured such that the pair of longitudinal beams extend in the longitudinal direction of the vehicle on the left and right sides; and a first crossbeam and a second crossbeam connected to the rear floor panel and configured such that the first crossbeam and the second crossbeam are spaced apart from each other in the longitudinal direction of the vehicle, and such that the first crossbeam and the second crossbeam extend to the left and right sides of the vehicle, wherein each end of the first crossbeam and the second crossbeam is connected to the pair of longitudinal beams.

[0010] The rear floor assembly may further include: a connecting reinforcement disposed between the first crossbeam and the second crossbeam, the two ends of the connecting reinforcement being connected to the first crossbeam and the second crossbeam, and the connecting reinforcement extending in the vehicle longitudinal direction.

[0011] The connecting reinforcements can be configured such that at least two connecting reinforcements are spaced apart from each other in the left-right direction of the vehicle.

[0012] The first crossbeam may be a rear floor front beam assembly, and the rear floor front beam assembly may include: a rear floor front beam whose two ends are connected to a pair of longitudinal beams, the two ends of the rear floor front beam being disposed on the left and right sides of the vehicle; and a rear floor front beam reinforcement whose two ends are disposed on the left and right sides of the vehicle, and the rear floor front beam reinforcement being disposed below the rear floor front beam and coupled to the rear floor front beam, the respective upper surfaces of the two ends of the rear floor front beam reinforcement being connected to the pair of longitudinal beams via respective side brackets, the side brackets being disposed therebetween, and the respective lower surfaces of the two ends of the rear floor front beam reinforcement being connected to the rear floor panel.

[0013] While the upper surface of the rear floor front beam reinforcement is attached to the front end of the rear floor front beam, the rear floor front beam reinforcement can protrude forward from the rear floor front beam.

[0014] The front end of the connecting reinforcement is connected to the rear end of the front beam of the rear floor, and is separated from and spaced apart from the front beam reinforcement of the rear floor. A second closed space can be formed between the front beam of the rear floor and the connecting reinforcement, and between the front beam reinforcement of the rear floor and the rear floor panel. A third closed space can be formed inside the front beam reinforcement of the rear floor.

[0015] While the connecting reinforcement is connected to the rear end portion of the rear floor front beam, the front end portion of the connecting reinforcement can extend forward and connect to the rear end portion of the rear floor front beam reinforcement.

[0016] While the rear floor front beam reinforcement is housed within the rear floor front beam, the rear floor front beam reinforcement can be attached to the front and rear portions of the rear floor front beam.

[0017] A second enclosed space can be formed between the upper surface of the rear floor front beam reinforcement and the rear floor front beam, a third enclosed space can be formed inside the rear floor front beam reinforcement, and a fourth enclosed space can be formed between the connecting reinforcement and the rear floor front beam reinforcement and between the rear floor panel and the second crossbeam.

[0018] The second crossbeam may be a rear floor beam assembly, and the rear floor beam assembly may include: an upper rear floor beam connected at both ends to a pair of longitudinal beams, the two ends of the upper rear floor beam being disposed on the left and right sides of the vehicle; and a lower rear floor beam connected to the upper rear floor beam, such that a fifth enclosed space is formed between the upper rear floor beam and the lower rear floor beam, and the two ends of the lower rear floor beam being connected at both ends to a pair of longitudinal beams, the two ends of the lower rear floor beam being disposed on the left and right sides of the vehicle.

[0019] The rear floor assembly may also include a rear floor beam reinforcement, which is disposed within a fifth enclosed space and is connected to the upper and lower rear floor beams.

[0020] A sixth enclosed space can be formed inside the rear floor beam reinforcement.

[0021] Each of the longitudinal beam, the first crossbeam, and the second crossbeam can have its own cross-sectional structure, and the interior of each cross-sectional structure is closed, so that the collision energy generated during a side collision is dispersed.

[0022] As described above, in the structure of the rear floor assembly for a vehicle according to the present invention, a pair of longitudinal beams are connected to a first crossbeam and a second crossbeam, and the first crossbeam and the second crossbeam are connected to each other by connecting reinforcements, thereby strengthening the overall frame structure of the rear floor assembly. Therefore, embodiments of the present invention can improve side-impact performance (crashworthiness) and passenger protection performance.

[0023] Since the rear floor assembly according to an embodiment of the present invention can be configured such that a first load transfer path, a second load transfer path, and a third load transfer path can be formed to disperse collision energy through the connection of longitudinal beams, a first crossbeam, a second crossbeam, and connecting reinforcements, side collision performance and passenger protection performance can be improved.

[0024] In the rear floor assembly according to an embodiment of the present invention, the longitudinal beams, the first crossbeam, and the second crossbeam may have an internally closed cross-section structure, which enables effective absorption and dispersion of collision energy generated during a side collision.

[0025] The advantages that can be obtained from the embodiments of the present invention are not limited to those described above, and those skilled in the art will understand from the following description other advantages not mentioned herein. Attached Figure Description

[0026] The above and other features and advantages of embodiments of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0027] Figure 1 This is a perspective view showing a rear floor assembly according to an embodiment of the present invention;

[0028] Figure 2 This is an exploded view showing a rear floor assembly according to an embodiment of the present invention;

[0029] Figures 3 to 5 They are along Figure 1 Cross-sectional views taken from lines II, II-II, and III-III;

[0030] Figure 6 , Figure 7 It is shown that... Figure 5 Schematic diagrams of other embodiments of the present invention, different from the illustrated embodiments; and

[0031] Figure 8 A schematic diagram illustrating an example of a high-voltage battery mounting component located in a rear floor assembly according to an embodiment of the present invention. Detailed Implementation

[0032] If a detailed description of well-known technologies would obscure the exemplary embodiments described herein, such a description may be omitted. The accompanying drawings are intended only to facilitate the description of exemplary embodiments herein, but the spirit and scope of the invention are not limited thereto. It should be understood that the invention is not limited to the specifically disclosed exemplary embodiments, but may include modifications, equivalents, and alternatives encompassed within the spirit and scope of the invention.

[0033] The terms used herein, including ordinal numbers such as "first" or "second," may be used to describe various components, but the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from other components.

[0034] As used in this article, the singular form may also include the plural form, unless the context clearly indicates otherwise.

[0035] It should be understood that terms such as “comprising,” “including,” and “having” are intended to indicate the presence of features, quantities, steps, actions, elements, components, or combinations thereof disclosed in the specification, and are not intended to exclude the possibility that one or more other features, quantities, steps, actions, elements, components, or combinations thereof may exist or be added.

[0036] When a component is described as "connected," "joined," or "linked" to another component, that component may be directly connected, joined, or linked to that other component. However, it should be understood that other components may exist between these two components. In contrast, it should be understood that when a component is described as "directly joined" or "directly connected" to another component, there are no intermediate components.

[0037] The "unit" or "control unit" included in the names "motor control unit (MCU)" and "hybrid power control unit (HCU)" usually refers to a controller that controls specific functions of the vehicle, rather than a general-purpose functional unit.

[0038] A “controller” may include a communication device configured to communicate with another controller or sensor to control functions assigned to it, a memory configured to store an operating system, logical commands, and input and output information, and at least one processor configured to perform the judgments, calculations, and decisions required to control the functions assigned to it.

[0039] In the following description, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings. In this specification, the same or similar components may be denoted by the same or similar reference numerals, and repeated descriptions thereof may be omitted.

[0040] like Figures 1 to 8 As shown, a rear floor assembly for a vehicle according to an embodiment of the present invention may include: a rear floor panel 10; a pair of longitudinal beams 20 connected to the rear floor panel 10 and configured such that the pair of longitudinal beams 20 extend in the longitudinal direction of the vehicle on the left and right sides; a first crossbeam 30 and a second crossbeam 40, both connected to the rear floor panel 10 and configured such that the first crossbeam 30 and the second crossbeam 40 are spaced apart from each other in the longitudinal direction of the vehicle, the first crossbeam 30 and the second crossbeam 40 extending to the left and right sides of the vehicle; and a connecting reinforcement 50 disposed between the first crossbeam 30 and the second crossbeam 40, the connecting reinforcement extending in the longitudinal direction of the vehicle and having its two ends respectively connected to the first crossbeam 30 and the second crossbeam 40. Each of the first crossbeam 30 and the second crossbeam 40 may have its two ends connected to the pair of longitudinal beams 20 respectively.

[0041] According to an embodiment of the present invention, the rear floor assembly may have a structure in which a pair of longitudinal beams 20 are connected to a first crossbeam 30 and a second crossbeam 40, and the first crossbeam 30 and the second crossbeam 40 are connected to each other by a connecting reinforcement 50, so that the skeletal structure of the rear floor assembly can be strengthened, the side impact performance (crash resistance) can be improved, and the passenger protection performance can be improved.

[0042] In the rear floor assembly according to an embodiment of the present invention, the connection structure between the longitudinal beam 20 and the first crossbeam 30 and the second crossbeam 40 can form a first load transfer path P1 and a second load transfer path P2, so that the collision energy E1 that may be generated in the event of a side collision is dispersed to the two paths. The connecting reinforcement 50 can form a third load transfer path P3 to disperse the collision energy into the first crossbeam 30 and the second crossbeam 40.

[0043] The first load transfer path P1, the second load transfer path P2, and the third load transfer path P3 can be used to effectively disperse the collision energy E1 that may be generated in the event of a side collision to multiple parts of the rear floor assembly, thereby improving side collision performance and passenger protection performance.

[0044] At least two connecting reinforcements 50 may be configured to be spaced apart from each other in the left-right direction of the vehicle, and at least two connecting reinforcements 50 may strengthen the skeleton structure of the rear floor assembly and improve side impact performance.

[0045] Each of the longitudinal beam 20, the first crossbeam 30, and the second crossbeam 40 may be provided with a cross-sectional structure, wherein the interior of each cross-sectional structure is closed, so that the collision energy E1 that may be generated in the event of a side collision can be effectively dispersed.

[0046] According to an embodiment of the present invention, the longitudinal beam 20 may be a side beam assembly 200.

[0047] The side beam assembly 200 may include: a side beam inner member 210 connected to one of the ends of the first crossbeam 30 and one of the ends of the second crossbeam 40; and a side beam outer member 220 which forms a first enclosed space C1 inside the side beam assembly 200 by being connected to the side beam inner member 210.

[0048] The first enclosed space C1 strengthens the skeleton structure of the side beam assembly 200 and allows for more effective absorption and dispersion of collision energy E1 in the event of a side collision.

[0049] In embodiments of the present invention, a side beam reinforcement 230 may also be included, which may be disposed in the first enclosed space C1 and may be combined with the side beam inner member 210 and the side beam outer member 220, and the side beam reinforcement 230 may be formed into a honeycomb structure.

[0050] The side beam reinforcement 230 with a honeycomb structure can be used to further strengthen the structure of the side beam assembly 200, thereby strengthening the skeleton structure of the side beam assembly 200.

[0051] The first crossbeam 30 can be the rear floor front beam assembly 300.

[0052] The rear floor front beam assembly 300 may include: a rear floor front beam 310, whose two ends are connected to longitudinal beams 20, the two ends of which are located on the left and right sides of the vehicle; and a rear floor front beam reinforcement 320, whose two ends are located on the left and right sides of the vehicle, and the rear floor front beam reinforcement 320 may be located below the rear floor front beam 310 and coupled to the rear floor front beam 310, the respective upper surfaces of the two ends of the rear floor front beam reinforcement 320 may be connected to the corresponding longitudinal beams 20 via respective side brackets 60, the side brackets 60 being interposed therebetween, and the respective lower surfaces of the two ends of the rear floor front beam reinforcement 320 may be connected to the rear floor panel 10.

[0053] The two ends of the rear floor front beam 310 can be joined and connected to the side beam inner member 210 that can form the longitudinal beam 20.

[0054] refer to Figure 5 and Figure 6 The rear floor front beam reinforcement 320 may have a structure in which, while the upper surface of the rear floor front beam reinforcement 320 is attached to the front end portion of the rear floor front beam 310, the rear floor front beam reinforcement 320 protrudes forward from the rear floor front beam 310, and such a structure can further strengthen the skeletal structure on the front side of the rear floor front beam 310.

[0055] like Figure 5 As shown, the rear floor front beam reinforcement 320 has the following structure: while the upper surface of the rear floor front beam reinforcement 320 is attached to the front end portion of the rear floor front beam 310, the rear floor front beam reinforcement 320 protrudes forward from the rear floor front beam 310; and the connecting reinforcement 50 may have the following structure: the front end portion of the connecting reinforcement 50 is connected to the rear end portion of the rear floor front beam 310, and can be separated from and spaced apart from the rear floor front beam reinforcement 320. At this time, a second enclosed space C2 may be formed between the rear floor front beam 310 and the connecting reinforcement 50 and between the rear floor front beam reinforcement 320 and the rear floor panel 10, and a third enclosed space C3 may be formed inside the rear floor front beam reinforcement 320.

[0056] The second enclosed space C2 and the third enclosed space C3 can strengthen the frame structure of the rear floor front beam assembly 300, and the collision energy E1 that may be generated in the event of a side collision can be absorbed and dispersed more effectively.

[0057] refer to Figure 6The rear floor front beam reinforcement 320 has the following structure: while the upper surface of the rear floor front beam reinforcement 320 is attached to the front end portion of the rear floor front beam 310, the rear floor front beam reinforcement 320 protrudes forward from the rear floor front beam 310; and the connecting reinforcement 50 may have the following structure: while the connecting reinforcement 50 is connected to the rear end portion of the rear floor front beam 310, the front end portion of the connecting reinforcement 50 extends forward and connects to the rear end portion of the rear floor front beam reinforcement 320.

[0058] This structure enables the connection between the connecting reinforcement 50 and the rear floor front beam reinforcement 320, and further strengthens the skeleton structure of the rear floor assembly.

[0059] refer to Figure 7 The rear floor front beam reinforcement 320 may have the following structure: the rear floor front beam reinforcement 320 is housed within the rear floor front beam 310, and the rear floor front beam reinforcement 320 is combined with the front end and rear end of the rear floor front beam 310. This structure can further strengthen the skeleton structure of the rear floor front beam 310.

[0060] like Figure 7 As shown, when the rear floor front beam reinforcement 320 has a structure in which the rear floor front beam reinforcement 320 is housed within the rear floor front beam 310 and is coupled to the rear floor front beam 310, a second enclosed space C2 can be formed between the upper surface of the rear floor front beam reinforcement 320 and the rear floor front beam 310, a third enclosed space C3 can be formed inside the rear floor front beam reinforcement 320, and a fourth enclosed space C4 can be formed between the connecting reinforcement 50 and the rear floor front beam reinforcement 320, and between the rear floor panel 10 and the second crossbeam 40.

[0061] The second enclosed space C2, the third enclosed space C3, and the fourth enclosed space C4 can strengthen the respective skeleton structures of the rear floor front beam assembly 300, the connecting reinforcement 50, and the rear floor panel 10, and the collision energy E1 that may be generated in the event of a side collision can be absorbed and dispersed more effectively.

[0062] The second crossbeam 40 can be the rear floor rear beam assembly 400.

[0063] The rear floor rear beam assembly 400 may include: an upper rear floor rear beam 410, both ends of which can be connected to the longitudinal beam 20, the two ends of which can be disposed on the left and right sides of the vehicle; a lower rear floor rear beam 420, which can be connected to the upper rear floor rear beam 410, such that a fifth enclosed space C5 can be formed between the upper rear floor rear beam 410 and the lower rear floor rear beam 420, and both ends of the lower rear floor rear beam 420 can be connected to the longitudinal beam 20, wherein the two ends of the lower rear floor rear beam 420 can be disposed on the left and right sides of the vehicle; and a rear floor rear beam reinforcement 430 can be disposed in the fifth enclosed space C5 and coupled to the upper rear floor rear beam 410 and the lower rear floor rear beam 420.

[0064] The sixth enclosed space C6 can be formed inside the rear floor beam reinforcement 430.

[0065] The two ends of the upper part 410 of the rear floor beam and the two ends of the lower part 420 of the rear floor beam can be combined and connected to the inner part 210 of the side beam that constitutes the longitudinal beam 20.

[0066] The fifth enclosed space C5 and the sixth enclosed space C6 can strengthen the skeleton structure of the rear floor and rear beam assembly 400, and the collision energy E1 that may be generated in the event of a side collision can be absorbed and dispersed more effectively.

[0067] refer to Figure 8 The mounting component 81 of the high-voltage battery 80 can be located below the closed section structure 70, which is formed by the connection between the rear floor panel 10 and a pair of longitudinal beams 20 and the connection between the first crossbeam 30 and the second crossbeam 40.

[0068] According to an embodiment of the present invention, since the mounting member 81 of the high-voltage battery 80 (corresponding to the mass body) can be located below the closed section structure 70 of the rear floor assembly, the bonding strength of the mounting member 81 of the high-voltage battery 80 can be maintained more firmly.

[0069] As described above, the rear floor assembly for a vehicle according to an embodiment of the present invention may have the following structure: a pair of longitudinal beams 20 are connected to a first crossbeam 30 and a second crossbeam 40, and the first crossbeam 30 and the second crossbeam 40 are connected to each other by connecting reinforcements 50, thereby strengthening the overall frame structure of the rear floor assembly. Accordingly, side impact performance (crashworthiness) and passenger protection performance can be improved.

[0070] Since the rear floor assembly according to an embodiment of the present invention can be configured such that a first load transfer path P1, a second load transfer path P2 and a third load transfer path P3 can be formed to disperse the collision energy E1 through the connection of the longitudinal beam 20, the first crossbeam 30, the second crossbeam 40 and the connecting reinforcement 50, the side collision performance and passenger protection performance can be improved.

[0071] In the rear floor assembly according to an embodiment of the present invention, the longitudinal beam 20, the first crossbeam 30 and the second crossbeam 40 may have an internally closed cross-section structure, so that the collision energy E1 that may be generated in the event of a side collision can be effectively absorbed and dispersed.

[0072] Although exemplary embodiments of the present invention have been described herein, it should be understood that the present invention is not limited to these exemplary embodiments, and various changes and modifications can be made by those skilled in the art within the spirit and scope of the present invention.

Claims

1. A rear floor assembly for a vehicle, comprising: Rear floor panel; A pair of longitudinal beams connected to the rear floor panel and configured such that the pair of longitudinal beams extend on the left and right sides of the vehicle in the longitudinal direction of the vehicle. as well as A first crossbeam and a second crossbeam are connected to the rear floor panel and are configured such that the first crossbeam and the second crossbeam are spaced apart from each other in the vehicle's longitudinal direction and extend to the left and right sides of the vehicle, wherein each end of the first crossbeam and the second crossbeam is connected to the pair of longitudinal beams.

2. The rear floor assembly according to claim 1, further comprising a connecting reinforcement disposed between the first crossbeam and the second crossbeam, wherein, The two ends of the connecting reinforcement are respectively connected to the first crossbeam and the second crossbeam, and the connecting reinforcement extends in the longitudinal direction of the vehicle.

3. The rear floor assembly according to claim 2, wherein, The connecting reinforcement is configured such that at least two connecting reinforcements are spaced apart from each other in the left-right direction of the vehicle.

4. The rear floor assembly according to claim 2, wherein, The first crossbeam includes a rear floor front beam assembly, wherein the rear floor front beam assembly includes: A rear floor front beam, with its two ends respectively connected to the pair of longitudinal beams, wherein the two ends of the rear floor front beam are located on the left and right sides of the vehicle; and A rear floor front beam reinforcement member has its two ends disposed on the left and right sides of the vehicle, wherein the rear floor front beam reinforcement member is disposed below the rear floor front beam and is connected to the rear floor front beam, wherein the upper surfaces of each end of the rear floor front beam reinforcement member are respectively connected to the pair of longitudinal beams via respective side brackets, the side brackets being interposed therebetween, and wherein the lower surfaces of each end of the rear floor front beam reinforcement member are connected to the rear floor panel.

5. The rear floor assembly according to claim 4, wherein, The rear floor front beam reinforcement protrudes forward from the rear floor front beam, and the upper surface of the rear floor front beam reinforcement is attached to the front end portion of the rear floor front beam.

6. The rear floor assembly according to claim 5, wherein, The front end of the connecting reinforcement is connected to the rear end of the front beam of the rear floor, and is separated from and spaced apart from the front beam reinforcement of the rear floor. A second enclosed space is defined between the front beam of the rear floor and the connecting reinforcement, and between the front beam reinforcement of the rear floor and the rear floor panel. A third enclosed space is defined inside the front beam reinforcement of the rear floor.

7. The rear floor assembly according to claim 5, wherein, The front end portion of the connecting reinforcement extends forward and connects to the rear end portion of the rear floor front beam reinforcement, and the connecting reinforcement is connected to the rear end portion of the rear floor front beam.

8. The rear floor assembly according to claim 4, wherein, The rear floor front beam reinforcement is attached to the front and rear portions of the rear floor front beam, and the rear floor front beam reinforcement is housed within the rear floor front beam.

9. The rear floor assembly according to claim 8, wherein, A second enclosed space is defined between the upper surface of the rear floor front beam reinforcement and the rear floor front beam. Specifically, a third enclosed space is defined within the rear floor front beam reinforcement, and A fourth enclosed space is defined between the connecting reinforcement and the rear floor front beam reinforcement, and between the rear floor panel and the second crossbeam.

10. The rear floor assembly of claim 1, wherein, The second crossbeam includes a rear floor beam assembly, wherein the rear floor beam assembly includes: A rear floor beam upper component, with its two ends respectively connected to the pair of longitudinal beams, wherein the two ends of the rear floor beam upper component are located on the left and right sides of the vehicle; and The lower rear floor beam is connected to the upper rear floor beam, thereby defining a fifth enclosed space between the upper and lower rear floor beams. The two ends of the lower rear floor beam are respectively connected to the pair of longitudinal beams, and the two ends of the lower rear floor beam are located on the left and right sides of the vehicle.

11. The rear floor assembly of claim 10, further comprising a rear floor rear beam reinforcement disposed within the fifth enclosed space and coupled to the upper and lower rear floor rear beams.

12. The rear floor assembly of claim 11, wherein, The sixth enclosed space is defined inside the rear floor beam reinforcement.

13. The rear floor assembly according to claim 1, wherein, Each of the longitudinal beam, the first crossbeam, and the second crossbeam has its own cross-sectional structure, and each cross-sectional structure has an internal closed structure that is configured to disperse the collision energy generated by a lateral collision among the longitudinal beam, the first crossbeam, and the second crossbeam.

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