Lower vehicle body force transmission structure and vehicle

Abstract

The utility model provides a lower vehicle body force transmission structure and a vehicle. The lower vehicle body force transmission structure comprises main longitudinal force transmission channels arranged on the two sides respectively, auxiliary longitudinal force transmission channels located on the outer sides of the main longitudinal force transmission channels on the two sides, and first transverse force transmission channels. Each side main longitudinal force transmission channel comprises a front cabin longitudinal beam, a front floor longitudinal beam and a rear floor longitudinal beam; each side auxiliary longitudinal force transfer channel comprises a torsion box connected with the front cabin longitudinal beam, a threshold longitudinal beam rear connecting plate connected with the rear floor longitudinal beam, and a threshold beam connected between the torsion box and the threshold longitudinal beam rear connecting plate; the first transverse force transmission channel comprises a front wall lower reinforcing beam, the two ends of the front wall lower reinforcing beam are connected with the torsion boxes on the two sides, and longitudinal beam inner reinforcing plates connected with the front wall lower reinforcing beam are arranged on the inner sides of the front cabin longitudinal beams on the sides. According to the lower vehicle body force transmission structure, the collision force transmission path of the lower vehicle body can be increased, the collision force transmission and dispersion effect is improved, and the collision safety of the whole vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle bodies, and in particular to a lower body force transmission structure. The utility model also relates to a vehicle provided with the lower body force transmission structure. Background Art

[0002] At this stage, as people pay more and more attention to vehicle collision safety, the collision response capability of the vehicle body has become an important aspect of the body development work of automobile company R&D personnel.

[0003] At present, in vehicles, the force transmission structure of the lower body, which is the basis of the whole vehicle structure, is mainly composed of the longitudinally arranged front cabin longitudinal beam, door sill beam and rear floor longitudinal beam, as well as the transversely arranged seat cross beam and rear floor cross beam. Although the existing lower body force transmission structure design can achieve the transmission and absorption of collision force to a certain extent, it also has the disadvantages of single force transmission path and unclear transmission and absorption effect of collision force, which is not conducive to improving the collision safety of the whole vehicle. Utility Model Content

[0004] In view of this, the utility model aims to provide an underbody force transmission structure to help improve the collision safety of the entire vehicle.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A lower vehicle body force transmission structure, comprising main longitudinal force transmission channels arranged on left and right sides, secondary longitudinal force transmission channels located on the side of the main longitudinal force transmission channels close to the outside of the vehicle along the left and right direction of the vehicle, and a first transverse force transmission channel;

[0007] The main longitudinal force transmission channel on each side includes a front cabin longitudinal beam, a front floor longitudinal beam and a rear floor longitudinal beam connected end to end in sequence;

[0008] The secondary longitudinal force transmission channel on each side includes a torsion box connected to the front cabin longitudinal beam on the same side, a sill longitudinal beam rear connecting plate connected to the rear floor longitudinal beam on the same side, and a sill beam connected between the torsion box and the sill longitudinal beam rear connecting plate;

[0009] The first lateral force transmission channel includes a front panel lower reinforcement beam located above the front cabin longitudinal beams on both sides, the left and right ends of the front panel lower reinforcement beam are respectively connected to the torsion boxes on both sides, and a longitudinal beam inner reinforcement plate connected to the front panel lower reinforcement beam is provided on the inner side of the front cabin longitudinal beam on each side.

[0010] Furthermore, the front engine room longitudinal beam on each side has a connected longitudinal beam front section and longitudinal beam rear section, and from the vertical direction of the whole vehicle, the longitudinal beam front sections on both sides are inclined toward the outside of the vehicle in the left and right direction of the whole vehicle.

[0011] Furthermore, viewed from the up and down direction of the vehicle, the rear sections of the longitudinal beams on both sides are inclined toward the outside of the vehicle in the left and right direction of the vehicle, and the front cabin longitudinal beams on each side form a corner at the position where the front section of the longitudinal beam is connected to the rear section of the longitudinal beam.

[0012] Further, the camber angle of the front section of the longitudinal beam on each side is between 6° and 10°, and the camber angle of the rear section of the longitudinal beam on each side is between 22° and 26°; and / or,

[0013] The torsion box and the inner reinforcement plate of the longitudinal beam on each side are connected to the corner position of the front cabin longitudinal beam on the same side.

[0014] Furthermore, a threshold longitudinal beam connecting plate is connected between the front floor longitudinal beam on each side and the threshold longitudinal beam on the same side;

[0015] The sill longitudinal beam connecting plates on both sides are connected with the seat cross beam in the vertical direction of the whole vehicle, and / or, the sill longitudinal beam connecting plates on each side are multiple and spaced apart in the front-rear direction of the whole vehicle.

[0016] Furthermore, a middle floor cross beam is connected between the front ends of the rear floor longitudinal beams on both sides.

[0017] Furthermore, a rear floor front cross beam is connected between the rear floor longitudinal beams on both sides;

[0018] The front cross beam of the rear floor is connected with the rear connecting plates of the door sill longitudinal beams on both sides in the left-right direction of the whole vehicle to form a second transverse force transmission channel.

[0019] Furthermore, a rear floor middle cross beam and a rear floor rear cross beam are connected between the rear floor longitudinal beams on both sides;

[0020] The rear cross beam of the rear floor is connected between the rear ends of the rear floor longitudinal beams on both sides, and the middle cross beam of the rear floor is located between the front cross beam of the rear floor and the rear cross beam of the rear floor.

[0021] Furthermore, a middle-front cross beam connecting beam extending in the front-rear direction of the vehicle is connected between the rear floor front cross beam and the rear floor middle cross beam; and / or,

[0022] A middle-rear cross beam connecting beam extending in the front-rear direction of the whole vehicle is connected between the middle cross beam of the rear floor and the rear cross beam of the rear floor.

[0023] Compared with the prior art, the utility model has the following advantages:

[0024] The lower vehicle body force transmission structure described in the utility model can form multiple force transmission channels that are interwoven horizontally and vertically in the lower vehicle body through the main longitudinal force transmission channel formed by connecting the front cabin longitudinal beam, the front floor longitudinal beam and the rear floor longitudinal beam, the secondary longitudinal force transmission channel formed by connecting the torsion box, the door sill beam and the rear connecting plate of the door sill longitudinal beam, and the first transverse force transmission channel formed by the front lower reinforcement beam, thereby increasing the collision force transmission path of the lower vehicle body, improving the collision force transmission dispersion effect, and being beneficial to improving the collision safety of the entire vehicle.

[0025] In addition, the front section of the longitudinal beam in the front engine room is set to be tilted outward, which can increase the contact area between the barrier and the vehicle body during a small overlap collision, which helps to improve the safety of a small overlap collision. The rear section of the longitudinal beam in the front engine room is set to be tilted outward, which helps to guide the collision force of the front engine room longitudinal beam to the front floor longitudinal beam and the door sill beam. At the same time, it can also increase the space between the front floor longitudinal beams on both sides. When the battery pack is arranged between the front floor longitudinal beams on both sides, the battery pack capacity can be increased, which is conducive to increasing the vehicle's endurance. The torsion box and the longitudinal beam inner reinforcement plate are connected to the corner position of the front engine room longitudinal beam. The corner position of the front engine room longitudinal beam can be locally reinforced by using the surrounding structure, which can prevent the corner position of the front engine room longitudinal beam from bending and deformation due to force.

[0026] Secondly, the threshold longitudinal beam connecting plate is set between the front floor longitudinal beam and the threshold beam, which can add a transverse force transmission channel between the main and secondary longitudinal force transmission channels, which helps to improve the dispersion effect of the collision force. The connection between the threshold longitudinal beam connecting plate and the seat crossbeam can increase the collision force transmission effect between the seat crossbeam and the threshold beam. The middle floor crossbeam is set between the front ends of the rear floor longitudinal beams on both sides, which can increase the rigidity of the front end of the rear floor longitudinal beam and also facilitate the transmission of the collision force between the main longitudinal force transmission channels on both sides.

[0027] In addition, a rear floor front crossbeam is arranged between the rear floor longitudinal beams on both sides, and the rear floor front crossbeam is connected to the door sill longitudinal beam rear connecting plate to form a second transverse force transmission channel, which can add a transverse force transmission channel between the main and secondary longitudinal force transmission channels on both sides of the rear body, and can further increase the transmission and dispersion effect of the collision force. The arrangement of the rear floor middle crossbeam and the rear floor rear crossbeam can increase the rigidity of the rear body, and is also beneficial to the transmission of the collision force between the main longitudinal force transmission channels on both sides. Connecting the middle front crossbeam connecting beam between the rear floor front crossbeam and the rear floor middle crossbeam, and connecting the middle rear crossbeam connecting beam between the rear floor middle crossbeam and the rear floor rear crossbeam can better increase the rigidity of the rear body, and is also beneficial to the transmission and dispersion of the collision force at the rear body.

[0028] Another object of the present invention is to provide a vehicle, wherein the vehicle is provided with the above-mentioned lower vehicle body force transmission structure.

[0029] The vehicle described in the utility model has the same beneficial effects as the above-mentioned lower vehicle body force transmission structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0031] Figure 1 It is a schematic diagram of the lower vehicle body force transmission structure according to an embodiment of the utility model;

[0032] Figure 2 for Figure 1 Schematic diagram of the middle structure (with the body floor removed);

[0033] Figure 3 It is a schematic diagram of the outward inclination arrangement of the front section of the longitudinal beam and the rear section of the longitudinal beam according to the embodiment of the utility model;

[0034] Figure 4 A schematic diagram of collision force transmission of the lower vehicle body force transmission structure according to an embodiment of the utility model;

[0035] Description of reference numerals:

[0036] 1. Front cabin longitudinal beam; 2. Front floor longitudinal beam; 3. Rear floor longitudinal beam; 4. Door sill beam; 5. Torsion box; 6. Door sill longitudinal beam rear connection plate; 7. Front enclosure lower reinforcement beam; 8. Longitudinal beam inner reinforcement plate; 9. Front floor; 10. Middle floor; 11. Rear floor; 12. Middle floor cross beam; 13. Rear floor front cross beam; 14. Rear floor middle cross beam; 15. Rear floor rear cross beam; 16. Middle channel; 17. Door sill longitudinal beam connection plate; 18. Seat cross beam; 19. Middle front cross beam connection beam; 20. Rear floor upper cross beam; 21. Middle rear cross beam connection beam;

[0037] 101, front section of longitudinal beam; 102, rear section of longitudinal beam;

[0038] α, camber angle of the front section of the longitudinal beam; β, camber angle of the rear section of the longitudinal beam; G, turning angle. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0043] Embodiment 1

[0044] This embodiment relates to a lower body force transmission structure, combined with Figure 1 and Figure 2 As shown in the figure, the lower vehicle body force transmission mechanism includes main longitudinal force transmission channels arranged on the left and right sides, and secondary longitudinal force transmission channels located on the side of the main longitudinal force transmission channel on each side close to the outside of the vehicle along the left and right directions of the vehicle. At the same time, the lower vehicle body force transmission structure of this embodiment also includes a first transverse force transmission channel.

[0045] The main longitudinal force transmission channel on each side includes a front cabin longitudinal beam 1, a front floor longitudinal beam 2 and a rear floor longitudinal beam 3 connected end to end in sequence. The secondary longitudinal force transmission channel on each side includes a torsion box 5 connected to the front cabin longitudinal beam 1 on the same side, a sill longitudinal beam rear connecting plate 6 connected to the rear floor longitudinal beam 3 on the same side, and a sill beam 4 connected between the torsion box 5 and the sill longitudinal beam rear connecting plate 6.

[0046] The above-mentioned first lateral force transmission channel includes a front lower reinforcement beam 7 located above the front cabin longitudinal beams 1 on both sides, the left and right ends of the front lower reinforcement beam 7 are respectively connected to the torsion boxes 5 on both sides, and the inner side of the front cabin longitudinal beam 1 on each side is also provided with a longitudinal beam inner reinforcement plate 8 connected to the front lower reinforcement beam 7.

[0047] At this time, as set up above, through the main longitudinal force transmission channel formed by connecting the front cabin longitudinal beam 1, the front floor longitudinal beam 2 and the rear floor longitudinal beam 3, the secondary longitudinal force transmission channel formed by connecting the torsion box 5, the sill beam 4 and the rear connecting plate 6 of the sill longitudinal beam, and the first transverse force transmission channel formed by the front lower reinforcement beam 7, this embodiment can form multiple force transmission channels that are interwoven horizontally and vertically in the lower vehicle body, thereby increasing the collision force transmission path of the lower vehicle body, so as to achieve the purpose of improving the collision force transmission and dispersion effect.

[0048] Based on the above overall introduction, specifically, it should be noted that the so-called "longitudinal" in the main longitudinal force transmission channel and the secondary longitudinal force transmission channel mentioned above also refers to the front and rear direction of the vehicle, and correspondingly, the "lateral" in the first lateral force transmission channel mentioned above also refers to the left and right direction of the vehicle.

[0049] In addition, in the lower vehicle body structure of the present embodiment, each side front cabin longitudinal beam 1 has a longitudinal beam front section 101 and a longitudinal beam rear section 102 connected to each other, and the rear end of the longitudinal beam rear section 102 is connected to the front floor longitudinal beam 2. In addition, the longitudinal beam rear section 102, the front floor longitudinal beam 2 and the rear floor longitudinal beam 3 are all located below the vehicle body floor, and are still as shown in FIG. Figure 1 As shown, the vehicle body floor may include, for example, a front floor 9, a middle floor 10 and a rear floor 11 arranged in sequence from front to rear, while the rear section 102 of the longitudinal beam and the front floor longitudinal beam 2 are located below the front floor 9, and the rear floor longitudinal beam 3 is located below the middle floor 10 and the rear floor 11.

[0050] In addition, the above-mentioned front panel lower reinforcement beam 7 is specifically located at the bottom of the front panel in the vehicle body, so as to serve as a lateral (i.e., left and right direction of the whole vehicle) reinforcement structure of the bottom of the front panel of the vehicle body, and the left and right ends of the front panel lower reinforcement beam 7 are not only connected to the torsion boxes 5 on each side, but also generally connected to the A-pillars on the left and right sides of the vehicle body, and the middle position of the front panel lower cross beam 7 is usually also connected to the front end of the center channel 16 in the vehicle body, and the rear end of the center channel 16 can be connected to the seat cross beam 18.

[0051] In this embodiment, on the basis that the front cabin longitudinal beam 1 on each side has a longitudinal beam front section 101 and a longitudinal beam rear section 102, as a preferred implementation form, continue as follows Figure 3 As shown, from the vertical direction of the vehicle, the front sections 101 of the longitudinal beams on both sides are inclined toward the outside of the vehicle in the left-right direction of the vehicle. In this way, the front section 101 of the longitudinal beam in the front engine compartment longitudinal beam 1 is arranged outwardly, which can increase the contact area between the barrier and the vehicle body during a small overlap collision, thereby helping to improve the safety of the small overlap collision.

[0052] In addition, in addition to the outward camber setting of the longitudinal beam front section 101, as a further preferred embodiment, Figure 3As shown, viewed from the up and down direction of the whole vehicle, this embodiment can also make the rear sections 102 of the longitudinal beams on both sides tilt toward the outside of the vehicle in the left and right direction of the whole vehicle, and based on this, the front cabin longitudinal beams 1 on each side form a corner G at the position where the front section 101 of the longitudinal beam is connected to the rear section 102 of the longitudinal beam.

[0053] In this way, by making the rear section 102 of the longitudinal beam in the front engine room longitudinal beam 1 also inclined outward, it not only helps to guide the collision force of the front engine room longitudinal beam 1 to be transmitted to the front floor longitudinal beam 2 and the door sill beam 4, but it can also obviously increase the space between the front floor longitudinal beams 2 on both sides. Therefore, when a vehicle model with a lower body structure using this embodiment is provided with a battery pack and the battery pack is arranged between the front floor longitudinal beams 2 on both sides, the capacity of the battery pack can be increased, which is beneficial to increase the endurance of the whole vehicle.

[0054] In this embodiment, Figure 3 As shown, in a specific implementation, the camber angle α of the front section 101 of each side longitudinal beam can be set, for example, between 6° and 10°, and can be specifically 6°, 7°, 7.5°, 8°, 9° or 10°. The camber angle β of the rear section 102 of each side longitudinal beam can be set, for example, between 22° and 26°, and can be specifically 22°, 23°, 24°, 24.5°, 25° or 26°.

[0055] Continue to see Figure 3 As shown, in this embodiment, as a preferred implementation form, the above-mentioned torsion boxes 5 on each side and the longitudinal beam inner reinforcement plate 8 are also connected to the position of the corner G on the front cabin longitudinal beam 1 on the same side. In this way, by connecting the torsion box 5 and the longitudinal beam inner reinforcement plate 8 to the position of the corner G of the front cabin longitudinal beam 1, the position of the corner G of the front cabin longitudinal beam 1 can be partially reinforced by the surrounding structure, so that the position of the corner G of the front cabin longitudinal beam 1 can be prevented from bending and deforming due to force.

[0056] It is worth noting that, in this embodiment, the bottom of the front enclosure lower reinforcement beam 7 can be overlapped on the top of the front cabin longitudinal beams 1 on both sides, and can be connected to the front cabin longitudinal beams on each side. In addition, the longitudinal beam inner reinforcement plate 8 is a stamped sheet metal part, and after being connected with the front cabin longitudinal beam 1 and the front enclosure lower reinforcement beam 7, preferably, a cavity structure can be formed between the longitudinal beam inner reinforcement plate 7, the front cabin longitudinal beam 1 and the front enclosure lower reinforcement beam 7 to increase the reinforcement effect of the longitudinal beam inner reinforcement plate 7.

[0057] As a preferred implementation form, Figures 1 to 3 As shown, in this embodiment, a sill longitudinal beam connecting plate 17 is connected between the front floor longitudinal beam 2 on each side and the sill beam 4 on the same side. Thus, by providing the sill longitudinal beam connecting plate 17 between the front floor longitudinal beam 2 and the sill beam 4, it can be understood that it can add a transverse force transmission channel between the main and auxiliary longitudinal force transmission channels, thereby helping to improve the dispersion effect of the collision force.

[0058] Based on the arrangement of the sill longitudinal beam connecting plates 17 on each side, in specific implementation, preferably, the embodiment can further make the sill longitudinal beam connecting plates 17 on both sides and the seat cross beam 18 on the front floor 9 connected in the vertical direction of the whole vehicle. At this time, the connection arrangement between the sill longitudinal beam connecting plates 17 and the seat cross beam 18, that is, their projections in the vertical direction of the whole vehicle at least partially overlap, and in addition to the overlapping projections, the sill longitudinal beam connecting plates 17 and the seat cross beam 18 can also be connected together by multi-layer welding through the front floor 9 located therebetween.

[0059] It can be understood that, by providing the sill longitudinal beam connecting plate 17 between each side sill beam 4 and the front floor longitudinal beam 2 and connecting it with the seat cross beam 18, this embodiment can increase the connection stiffness between the seat cross beam 18 and the sill beam 4, which helps to increase the collision force transmission effect between the two.

[0060] In this embodiment, as a preferred implementation form, the sill longitudinal beam connecting plates 17 on each side can be set as a plurality of them arranged at intervals along the front-rear direction of the vehicle. Figure 2 As shown, in the lower vehicle body of the present embodiment, the seat cross beams 18 can generally be arranged as two arranged at intervals in the front and rear, so as to facilitate the installation of the front seats of the vehicle. Correspondingly, the sill longitudinal beam connecting plates 17 arranged at intervals on each side can also be arranged one-to-one with the seat cross beams 18, so as to strengthen the connection stiffness between the sill beam 4 and the seat cross beams 18.

[0061] Still by Figure 1 and Figure 2 As shown, as a preferred implementation form, in this embodiment, a middle floor cross beam 12 is connected between the front ends of the rear floor longitudinal beams 3 on both sides. The middle floor cross beam 12 is located below the middle floor 10, and by arranging the middle floor cross beam 12 between the front ends of the rear floor longitudinal beams 3 on both sides, it can be understood that it can increase the rigidity of the front end position of the rear floor longitudinal beams 3 on each side, and also facilitate the transmission of the collision force between the main longitudinal force transmission channels on both sides.

[0062] In addition, in addition to the above-mentioned middle floor cross beam 12, in this embodiment, as a preferred implementation form, a rear floor front cross beam 13 is also connected between the rear floor longitudinal beams 3 on both sides. Figure 2 As shown, the rear connecting plates 6 of the door sill longitudinal beams on both sides are connected in the left-right direction of the vehicle to form a second transverse force transmission channel.

[0063] At this time, the "lateral" in the second lateral force transmission channel also refers to the left-right direction of the vehicle. The connection between the rear floor front cross beam 13 and the rear connecting plates 6 of the side sill longitudinal beams is that their projections in the left-right direction of the vehicle at least partially overlap, and in addition to the overlapping projections, the rear floor front cross beam 13 and the rear connecting plates 6 of the side sill longitudinal beams are also indirectly connected together via the rear floor longitudinal beams 3.

[0064] At the same time, by setting the rear floor front cross beam 12 between the above-mentioned two side rear floor longitudinal beams 3, and connecting it with the two side door sill longitudinal beam rear connecting plates 6 to form a second transverse force transmission channel, it is obvious that it can be understood that this embodiment can add a transverse force transmission channel between the main and secondary longitudinal force transmission channels on both sides of the rear part of the vehicle body, thereby further increasing the transmission and dispersion effect of the collision force.

[0065] In this embodiment, as a preferred implementation form, a rear floor middle cross beam 14 and a rear floor rear cross beam 15 are further connected between the rear floor longitudinal beams 3 on both sides. The rear floor rear cross beam 15 is connected between the rear ends of the rear floor longitudinal beams 3 on both sides, and the rear floor middle cross beam 14 is located between the rear floor front cross beam 13 and the rear floor rear cross beam 15. Moreover, on the basis of the rear floor middle cross beam 14 and the rear floor rear cross beam 15, in this embodiment, a middle front cross beam connecting beam 19 extending in the front-rear direction of the whole vehicle can be connected between the rear floor front cross beam 13 and the rear floor middle cross beam 14, and a middle rear cross beam connecting beam 21 extending in the front-rear direction of the whole vehicle can be connected between the rear floor middle cross beam 14 and the rear floor rear cross beam 15.

[0066] In a specific implementation, the above-mentioned middle front cross beam connecting beams 19 can be, for example, two arranged side by side, and the two middle front cross beam connecting beams 19 are also arranged in an intersecting shape with the rear floor upper cross beam 20 located above the rear floor 11. The above-mentioned middle rear cross beam connecting beam 21 can be, for example, only one, and the middle rear cross beam connecting beam 21 can preferably be arranged corresponding to the middle position of the middle front cross beam connecting beams 19 on both sides.

[0067] It is understandable that, by disposing the above-mentioned rear floor middle cross beam 13 and rear floor rear cross beam 14, the present embodiment can increase the rigidity of the rear part of the vehicle body, and facilitate the transmission of the collision force between the main longitudinal force transmission channels on both sides. By connecting the middle front cross beam connecting beam 19 between the rear floor front cross beam 13 and the rear floor middle cross beam 14, and connecting the middle rear cross beam connecting beam 21 between the rear floor middle cross beam 14 and the rear floor rear cross beam 15, it can better increase the rigidity of the rear part of the vehicle body, and also facilitate the transmission and dispersion of the collision force at the rear part of the vehicle body, so as to increase the safety of the vehicle in rear collision.

[0068] In this embodiment, it is worth noting that, in specific implementation, each of the above beam structures and each connecting plate structure can be made of conventional stamped sheet metal, and each of the above beam structures and each connecting plate structure can also be connected by welding. At the same time, for the front cabin longitudinal beam 1, the rear floor longitudinal beam 3, the door sill beam 4, the torsion box 5, the seat cross beam 8 and the cross beams located between the rear floor longitudinal beams 3 on both sides, their arrangement in the vehicle body can also refer to the relevant structures in the existing vehicle body.

[0069] The lower vehicle body force transmission structure of the present embodiment adopts the above design, through the main longitudinal force transmission channel formed by connecting the front cabin longitudinal beam 1, the front floor longitudinal beam 2 and the rear floor longitudinal beam 3, the secondary longitudinal force transmission channel formed by connecting the torque box 5, the door sill beam 4 and the door sill longitudinal beam connecting plate 6, and the front and rear transverse force transmission channels formed by the front enclosure lower reinforcement beam 7 and the rear floor front cross beam 13, a plurality of force transmission channels interlaced horizontally and vertically can be formed in the lower vehicle body of the present embodiment, which can increase the collision force transmission path of the lower vehicle body, improve the collision force transmission dispersion effect, and is beneficial to improving the collision safety of the whole vehicle.

[0070] In addition, if Figure 4 As shown, in the lower vehicle body force transmission structure of this embodiment, when the vehicle collides, for the vehicle head-on collision condition, the collision force can be transmitted to the rear rear floor longitudinal beam 6 through the front cabin longitudinal beam 1 along the main and secondary longitudinal force transmission channels respectively. At the same time, during the longitudinal transmission process, it can also be transmitted laterally through the first and second transverse force transmission channels, as well as through the middle floor cross beam 12, the front, middle and rear cross beams of the rear floor, etc., so that the transmission and dispersion of the head-on collision force can be achieved to ensure the safety of the vehicle head-on collision.

[0071] For a rear-end collision of the vehicle, similar to a head-on collision, the collision force can be transmitted through the rear floor longitudinal beam 3 along the main and secondary longitudinal force transmission channels to the front engine compartment longitudinal beam 1 in front. At the same time, during the longitudinal transmission process, it can also be transmitted laterally through the second and first transverse force transmission channels, as well as through the front, middle and rear cross beams of the rear floor and the middle floor cross beam 12, so as to achieve the transmission dispersion of the head-on collision force and ensure the safety of the vehicle in a rear-end collision.

[0072] As for the vehicle side collision condition, the side collision force can be transmitted to the main longitudinal force transmission channel on the same side through the threshold beam 4 on the collision side by the torsion box 5, the threshold longitudinal beam connecting plate 17 and the threshold longitudinal beam rear connecting plate 6, and then can be further transmitted to the main and secondary longitudinal force transmission channels on the other side through the seat cross beam 18, the middle floor cross beam 12 and the front, middle and rear cross beams of the rear floor, thereby achieving the transmission and dispersion of the side collision force to ensure the vehicle side collision safety.

[0073] Embodiment 2

[0074] This embodiment relates to a vehicle, in which the lower vehicle body force transmission structure in the first embodiment is provided.

[0075] The vehicle of this embodiment is equipped with the lower body force transmission structure of the first embodiment, which can form multiple force transmission channels that are interwoven horizontally and vertically in the lower body, increase the lower body collision force transmission path, and improve the collision force transmission and dispersion effect, which is beneficial to improving the collision safety of the entire vehicle.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lower vehicle body force transmission structure, characterized in that: It includes main longitudinal force transmission channels arranged on the left and right sides, and secondary longitudinal force transmission channels located on the side of the main longitudinal force transmission channels close to the outside of the vehicle along the left and right directions of the vehicle, and also includes a first transverse force transmission channel; The main longitudinal force transmission channel on each side comprises a front cabin longitudinal beam (1), a front floor longitudinal beam (2) and a rear floor longitudinal beam (3) which are connected end to end in sequence; The secondary longitudinal force transmission channel on each side comprises a torsion box (5) connected to the front cabin longitudinal beam (1) on the same side, a sill longitudinal beam rear connecting plate (6) connected to the rear floor longitudinal beam (3) on the same side, and a sill beam (4) connected between the torsion box (5) and the sill longitudinal beam rear connecting plate (6); The first transverse force transmission channel comprises a front enclosure lower reinforcement beam (7) located above the front cabin longitudinal beams (1) on both sides, the left and right ends of the front enclosure lower reinforcement beam (7) are respectively connected to the torsion boxes (5) on both sides, and a longitudinal beam inner reinforcement plate (8) connected to the front enclosure lower reinforcement beam (7) is provided on the inner side of the front cabin longitudinal beam (1) on each side.

2. The lower vehicle body force transmission structure according to claim 1, characterized in that: The front engine room longitudinal beam (1) on each side has a connected longitudinal beam front section (101) and a longitudinal beam rear section (102), and when viewed from the vertical direction of the whole vehicle, the longitudinal beam front sections (101) on both sides are inclined toward the outside of the vehicle in the left-right direction of the whole vehicle.

3. The lower vehicle body force transmission structure according to claim 2, characterized in that: When viewed from the vertical direction of the vehicle, the rear sections (102) of the longitudinal beams on both sides are inclined toward the outside of the vehicle in the left-right direction of the vehicle, and the front cabin longitudinal beams (1) on each side form a corner (G) at the position where the front section (101) of the longitudinal beam is connected to the rear section (102) of the longitudinal beam.

4. The lower vehicle body force transmission structure according to claim 3, characterized in that: The camber angle of the front section (101) of the longitudinal beam on each side is between 6° and 10°, and the camber angle of the rear section (102) of the longitudinal beam on each side is between 22° and 26°; and / or, The torsion box (5) and the inner reinforcement plate (8) of the longitudinal beam on each side are connected to the position of the corner (G) on the front cabin longitudinal beam (1) on the same side.

5. The lower vehicle body force transmission structure according to claim 1, characterized in that: A sill longitudinal beam connecting plate (17) is connected between the front floor longitudinal beam (2) on each side and the sill beam (4) on the same side; The sill longitudinal beam connecting plates (17) on both sides are connected to the seat cross beam (18) in the vertical direction of the whole vehicle, and / or the sill longitudinal beam connecting plates (17) on each side are multiple and spaced apart in the front-rear direction of the whole vehicle.

6. The lower vehicle body force transmission structure according to claim 1, characterized in that: A middle floor crossbeam (12) is connected between the front ends of the rear floor longitudinal beams (3) on both sides.

7. The lower vehicle body force transmission structure according to any one of claims 1 to 6, characterized in that: A rear floor front cross beam (13) is connected between the rear floor longitudinal beams (3) on both sides; The rear floor front cross beam (13) and the door sill longitudinal beam rear connection plates (6) on both sides are connected in the left-right direction of the whole vehicle to form a second transverse force transmission channel.

8. The lower vehicle body force transmission structure according to claim 7, characterized in that: A rear floor middle cross beam (14) and a rear floor rear cross beam (15) are connected between the rear floor longitudinal beams (3) on both sides; The rear floor rear cross beam (15) is connected between the rear ends of the rear floor longitudinal beams (3) on both sides, and the rear floor middle cross beam (14) is located between the rear floor front cross beam (13) and the rear floor rear cross beam (15).

9. The lower vehicle body force transmission structure according to claim 8, characterized in that: A middle-front cross beam connecting beam (19) extending in the front-rear direction of the vehicle is connected between the rear floor front cross beam (13) and the rear floor middle cross beam (14); and / or, A middle-rear cross beam connecting beam (21) extending in the front-rear direction of the vehicle is connected between the middle cross beam (14) of the rear floor and the rear cross beam (15) of the rear floor.

10. A vehicle, characterized in that: The vehicle is provided with the lower vehicle body force transmission structure according to any one of claims 1 to 9.

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