Vehicle body reinforcing structure and vehicle provided with same

Abstract

The invention provides a vehicle body reinforcing structure and a vehicle with the vehicle body reinforcing structure The vehicle body reinforcing structure comprises a rear floor framework in a rear floor assembly, front floor upper longitudinal beams arranged on the left side and the right side respectively and a front wall lower cross beam and further comprises a rear floor lower cross beam connected to the bottom of the rear floor framework and threshold beams arranged on the left side and the right side respectively. The torsion boxes are connected to the rear ends of the front cabin longitudinal beams on the left side and the right side respectively; the rear floor framework, the front wall lower cross beam, the front floor upper longitudinal beam on the two sides and the front wall longitudinal beam on the two sides are connected to form a first annular reinforcing structure, and the rear floor lower cross beam, the cabin rear section cross beam, the doorsill beams on the two sides and the torsion box are connected to form a second annular reinforcing structure. According to the vehicle body reinforcing structure, the structural strength and torsional rigidity of the vehicle body can be improved, the collision force transmission effect during collision can be improved, and the safety of the whole vehicle can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle bodies, and in particular to a vehicle body reinforcement structure. The present invention also relates to a vehicle provided with the vehicle body reinforcement structure. Background Art

[0002] At present, with the development of automobile technology and the improvement of people's living standards, the popularity of automobiles among the public is getting higher and higher. Especially under the rapid development of new energy vehicles, various automobile companies have also transformed to electrification and launched a variety of pure electric or hybrid models to meet people's different car needs.

[0003] Regardless of whether it is a fuel vehicle or a new energy vehicle, as people pay more and more attention to the safety of the vehicle, the structural strength of the vehicle body and the collision force transmission performance of the vehicle body in the event of a collision have become the focus of the work of the research and development personnel of the automobile companies. Therefore, it is particularly important to improve and optimize the vehicle body structure to better increase the structural performance of the vehicle body, improve the force transmission capacity in the event of a collision, and enhance the safety of the vehicle. Summary of the invention

[0004] In view of this, the present invention aims to propose a vehicle body reinforcement structure to increase the structural strength and torsional rigidity of the vehicle body, thereby helping to improve the safety of the entire vehicle.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A vehicle body reinforcement structure, comprising a rear floor frame in a rear floor assembly, upper longitudinal beams of the front floor arranged on the left and right sides, and a lower cross beam of the front enclosure, and also comprising a lower cross beam of the rear floor connected to the bottom of the rear floor frame, sill beams arranged on the left and right sides, and a torsion box respectively connected to the rear ends of the left and right front cabin longitudinal beams;

[0007] The rear ends of the upper longitudinal beams on the front floor on both sides are connected to the rear floor frame, the front ends of the upper longitudinal beams on the front floor on both sides are connected to the lower cross beam of the front enclosure through the longitudinal beam of the front enclosure, and the rear floor frame, the lower cross beam of the front enclosure, and the upper longitudinal beams on the front floor on both sides and the longitudinal beam of the front enclosure are connected to form a first annular reinforcement structure;

[0008] The left and right sides of the lower cross beam of the rear floor are respectively connected to the rear ends of the door sill beams on the corresponding sides, the torsion boxes on each side are connected to the front ends of the door sill beams on the same side, and the rear section cross beam of the cabin is connected between the torsion boxes on both sides, the lower cross beam of the rear floor, the rear section cross beam of the cabin, and the door sill beams and the torsion boxes on both sides are connected to form a second annular reinforcement structure.

[0009] Furthermore, the rear floor frame has rear floor longitudinal beams arranged on the left and right sides, and a reinforcing sealing plate is arranged in the rear floor longitudinal beams on each side, and the reinforcing sealing plates on both sides extend along the front-rear direction of the vehicle, and the front end of each reinforcing sealing plate extends out from the front end of the rear floor longitudinal beam on the same side;

[0010] The rear end of the upper longitudinal beam of the front floor on each side is connected to the rear floor frame through the reinforcing sealing plate on the same side.

[0011] Furthermore, each of the reinforcing sealing plates is separated into an upper cavity and a lower cavity located above and below the reinforcing sealing plates respectively in the rear floor longitudinal beam on the same side; the rear end of each of the reinforcing sealing plates is arranged corresponding to the front mounting portion of the rear subframe in the rear floor longitudinal beam on the same side.

[0012] Furthermore, the top of the rear floor longitudinal beam is covered with a longitudinal beam cover plate; the lower cavity is formed between the rear floor longitudinal beam and the reinforcing sealing plate, and the upper cavity is formed between the rear floor longitudinal beam, the reinforcing sealing plate and the longitudinal beam cover plate.

[0013] Furthermore, the front mounting portion of the rear subframe includes a screw connection member arranged in the lower cavity of the longitudinal beam; the screw connection member is integrally formed, and the screw connection member has a support plate connected to the rear floor longitudinal beam, and a screw sleeve with one end connected to the support plate; a threaded connection hole is provided in the screw sleeve, the threaded connection hole passes through the support plate, and a connecting through hole arranged corresponding to the threaded connection hole is provided at the bottom of the rear floor longitudinal beam.

[0014] Furthermore, one end of the screw sleeve away from the bottom plate passes through the reinforcing sealing plate and extends into the upper cavity of the longitudinal beam; the distance between the end of the screw sleeve extending into the upper cavity of the longitudinal beam and the reinforcing sealing plate is within 10 mm, and the screw sleeve is connected to the reinforcing sealing plate.

[0015] Furthermore, the reinforcing sealing plate is provided with reinforcing ribs at the portion where the screw sleeve extends into the upper cavity of the longitudinal beam; the reinforcing ribs include an annular reinforcing rib body and a plurality of linear reinforcing rib bodies connected to the annular reinforcing rib body; the annular reinforcing rib body is arranged around the screw sleeve, and the plurality of linear reinforcing rib bodies are radially arranged with the annular reinforcing rib body as the center.

[0016] Further, the front mounting portion of the rear subframe further comprises a side reinforcing plate located in the lower cavity of the longitudinal beam, the side reinforcing plate is connected to the rear floor longitudinal beam, and the side reinforcing plates are arranged side by side on one side of the screw sleeve, and the screw sleeve is connected to the side reinforcing plate; and / or,

[0017] The support plate is spot welded to the rear floor longitudinal beam, and the screw connection is integrally stamped.

[0018] Further, the rear floor skeleton further has a rear floor middle cross beam connected between the rear floor longitudinal beams on both sides. The lower rear floor cross beam is in a "C" shape with an opening facing forward; each side of the rear floor longitudinal beam is connected to the rear end of the same side sill beam, and the lower rear floor cross beam is connected between the front sections of the rear floor longitudinal beams on both sides and the rear floor middle cross beam.

[0019] Further, the rear floor skeleton further has a front rear floor cross beam and a rear rear floor cross beam connected between the rear floor longitudinal beams on both sides; the front rear floor cross beam is connected between the front sections of the rear floor longitudinal beams on both sides, the rear rear floor cross beam is connected between the rear sections of the rear floor longitudinal beams on both sides, and the rear floor middle cross beam is connected in the transition area between the front section and the rear section of each side of the rear floor longitudinal beam;

[0020] A circular structure is formed by connecting the front rear floor cross beam, the rear floor middle cross beam and the rear floor longitudinal beams on both sides, and a circular structure is formed by connecting the rear rear floor cross beam, the rear floor middle cross beam and the rear floor longitudinal beams on both sides.

[0021] Further, rear sill beams are provided at the rear ends of both sides of the sill beams. Each side of the rear sill beam is connected to the rear floor longitudinal beam; a longitudinal beam front section cavity is formed by enclosing between the front section on each side, the rear sill beam and the rear floor panel, and a lower cross beam side cavity is formed by enclosing between the front section on each side, the rear sill beam and the lower rear floor cross beam;

[0022] A middle cross beam cavity is formed by enclosing between the rear floor middle cross beam and the rear floor panel, and a lower cross beam middle cavity is formed by enclosing between the lower rear floor cross beam and the rear floor middle cross beam; the longitudinal beam front section cavity and the lower cross beam side cavity are stacked in the up and down direction of the whole vehicle, and the middle cross beam cavity and the lower cross beam middle cavity are stacked in the up and down direction of the whole vehicle.

[0023] Further, it further includes a front row seat mounting cross beam connected between the sill beams on both sides, and a middle channel extending in the front and rear direction of the whole vehicle; the front row seat mounting cross beam penetrates from one side of the sill beam to the other side of the sill beam, the front end of the middle channel is connected to the lower front cross beam, and the rear end of the middle channel is connected to the front row seat mounting cross beam.

[0024] Further, the front row seat mounting cross beam includes a cross beam body and connecting beams connected to the left and right ends of the cross beam body. The cross beam body is formed by a roll forming process, and the cross beam body has a plurality of cross beam main bodies connected in sequence in the front and rear direction of the whole vehicle. The cross section of each cross beam main body is in a "several" shape; and / or,

[0025] The middle channel has a plurality of middle channel bodies connected in sequence in the left-right direction of the whole vehicle, and the cross-section of each middle channel body is in a "Ji" shape.

[0026] Furthermore, mounting through holes for battery pack installation are provided on both of the side sill beams, and nut plates corresponding to the mounting through holes; the mounting through holes are long holes extending in the left-right direction of the whole vehicle, the nut plate has a bottom plate, and welding nuts arranged on the bottom plate, and the battery pack is connected to the welding nuts through connecting bolts passing through the mounting through holes;

[0027] A crush plate is connected to the bottom plate through a deformable connecting part, the welding nut is connected to the crush plate, and when the connecting part deforms, the welding nut can move relative to the bottom plate along the length direction of the mounting through hole.

[0028] Furthermore, a through hole is provided on the bottom plate, the crush plate is located in the through hole, and among the two ends of the crush plate in the length direction of the mounting through hole, one end is connected to the bottom plate through the connecting part, and a deformation space is formed between the other end and the inner wall of the notch; and / or,

[0029] The connecting part adopts a bent connecting plate.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] In the body strengthening structure of the present invention, the rear floor frame is connected to the rear end of the front floor upper longitudinal beam, the front end of the front floor upper longitudinal beam is connected to the front lower cross beam through the front围 longitudinal beam, and at the same time, the rear floor frame, the front lower cross beam, and the front floor upper longitudinal beams and front围 longitudinal beams on both sides are connected to form a first annular strengthening structure, and by providing the rear floor lower cross beam, the torsion boxes on both sides are connected through the rear section of the engine compartment cross beam, and at the same time, the rear floor lower cross beam, the rear section of the engine compartment cross beam, and the side sill beams and torsion boxes on both sides are connected to form a second annular strengthening structure.

[0032] Thereby, the present invention can not only utilize the characteristics of the large strength of the annular structure to increase the structural strength and torsional stiffness of the body, improve the structural strength and torsional stiffness of the bottom of the body, but also can utilize the annular structure to form two upper and lower annular force transmission channels in the body, which helps to transmit and disperse the collision force in the body, and is beneficial to improving the safety of the whole vehicle.

[0033] In addition, the setting of the reinforcement cover plate can increase the structural strength of the rear floor longitudinal beam and facilitate the connection between the upper longitudinal beam on the front floor and the rear floor frame. The reinforcement cover plate separates the upper cavity and the lower cavity in the rear floor longitudinal beam, and the rear end of the reinforcement cover plate is arranged corresponding to the front mounting portion of the rear subframe. Not only can the formed double cavity structure be used to increase the structural strength of the rear floor longitudinal beam and improve the collision force transmission capacity of the rear floor longitudinal beam, but also the dynamic stiffness of the rear subframe mounting point can be increased, and the torsional performance of the rear body can be improved. The top of the rear floor longitudinal beam is covered with a longitudinal beam cover plate, which can improve the structural performance of the rear floor longitudinal beam position and facilitate the formation of the upper cavity.

[0034] The screw connection is formed in one piece, so there is no welding connection structure between the support plate and the screw sleeve, and rust will not occur at the connection position, which can improve the overall anti-rust performance of the screw connection. At the same time, the structural strength of the screw connection itself can be guaranteed by one-piece molding, which helps to improve the reliability of the subframe installation. One end of the screw sleeve passes through the reinforcement sealing plate and is connected to the reinforcement sealing plate. The reinforcement sealing plate can be used to increase the stability of the screw connection and improve the rigidity of the front mounting point of the rear subframe. The distance between the reinforcement sealing plate and the end of the screw sleeve is within 10 mm, which can increase the height of the lower cavity along the axial direction of the screw sleeve, help increase the cross-sectional size of the lower cavity, and improve the overall structural strength of the rear floor longitudinal beam after the reinforcement sealing plate is set.

[0035] Secondly, by setting up reinforcing ribs, the rigidity of the screw sleeve can be increased by increasing the structural strength of the reinforcing sealing plate, thereby improving the stability of the subframe installation. The reinforcing ribs are composed of annular reinforcing ribs and radially arranged linear reinforcing ribs, which can enhance the ability of the screw sleeve in the middle to resist deformation and further increase the overall rigidity of the screw connection. By setting up side reinforcing plates, the strength of the lower cavity structure can be increased, the overall strength of the location of the screw connection can be improved, and the reliability of the rear subframe installation can be improved.

[0036] The support plate is spot welded to the rear floor longitudinal beam, which can reduce damage to the support plate and the rear floor longitudinal beam, avoid ablation failure caused by double welding, improve the torsion resistance of the bolted parts after connection, and ensure the reliability of the bolted parts in the rear floor longitudinal beam. The bolted parts are formed by one-piece stamping to ensure the structural strength and toughness of the bolted parts and increase the reliability of the bolted parts structure.

[0037] Furthermore, the lower cross beam of the rear floor is connected between the front sections of the rear floor longitudinal beams on both sides and the middle cross beam of the rear floor, which can increase the strength and rigidity of the front position of the rear floor assembly, improve the stability of the installation of the rear end of the battery pack or the fuel tank, and also increase the structural strength of the rear floor frame. The front cross beam of the rear floor and the rear cross beam of the rear floor are set, and the front cross beam of the rear floor, the middle cross beam of the rear floor and the longitudinal beams of the rear floor on both sides, as well as the rear cross beam of the rear floor, the middle cross beam of the rear floor and the longitudinal beams of the rear floor on both sides are connected to form a ring structure, which can take advantage of the high strength of the ring structure to further improve the structural strength of the rear floor frame.

[0038] By forming the longitudinal beam front section cavity and the lower cross beam side cavity stacked up and down, as well as the middle cross beam cavity and the lower cross beam middle cavity stacked up and down, the double cavity structure can be used to increase the structural strength of the two sides of the front of the rear floor assembly and the middle of the front of the rear floor assembly, and can also improve the dynamic stiffness of the front mounting point of the rear subframe and improve the collision performance of the rear body. The front seat mounting cross beam is a through structure, which can ensure the penetration of the force transmission channel formed by the front seat mounting cross beam, which is conducive to improving the side impact force transmission capacity.

[0039] In addition, the cross beam body is formed by a roll forming process and is composed of a plurality of cross beam bodies with a "J"-shaped cross section, which can increase the structural strength of the cross beam body itself. The middle channel is composed of middle channel bodies connected in sequence and with a "J"-shaped cross section, which can make the middle channel have a wave-like structure, increase the cross-sectional area of ​​the middle channel, and improve the structural strength of the middle channel itself, which helps to improve the collision force transmission performance of the middle channel.

[0040] The battery pack installation point at the threshold beam is composed of a long strip of installation holes and a nut plate with a base plate and a welding nut, and the welding nut can move relative to the base plate along the length direction of the installation hole, which can achieve the collapse displacement of the battery pack installation point when a side collision occurs, which is beneficial to reduce the collision impact on the battery pack and improve the safety of the battery pack. The collapse plate is arranged in the through hole on the base plate, and one end of the collapse plate is connected to the base plate through a connecting portion, and a deformation space is formed at the other end, which helps to simplify the nut plate structure and can limit the moving distance of the welding nut, thereby ensuring the use effect of the nut plate when it collapses. The connecting portion adopts a curved connecting plate, which has a simple structure, is easy to prepare and form, and has a good collapse deformation effect.

[0041] Another object of the present invention is to provide a vehicle, wherein the vehicle is provided with the vehicle body reinforcement structure as described above.

[0042] The vehicle described in the present invention has the same beneficial effects as the above-mentioned vehicle body reinforcement structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 A schematic diagram of a vehicle body structure according to an embodiment of the present invention;

[0045] Figure 2 It is a schematic diagram of the connection between the reinforced sealing plate, the longitudinal beam on the front floor and the longitudinal beam on the front cabin according to an embodiment of the present invention;

[0046] Figure 3 It is a schematic diagram of a vehicle body structure according to an embodiment of the present invention from a bottom perspective;

[0047] Figure 4 It is a structural schematic diagram of a rear floor assembly according to an embodiment of the present invention;

[0048] Figure 5 It is a schematic structural diagram of the rear floor frame according to an embodiment of the present invention;

[0049] Figure 6 It is a schematic diagram of the arrangement of the reinforced sealing plate in the rear floor longitudinal beam according to an embodiment of the present invention;

[0050] Figure 7 It is a schematic diagram of the arrangement of the front mounting portion of the rear subframe in the rear floor longitudinal beam according to an embodiment of the present invention;

[0051] Figure 8 for Figure 7 A partial enlarged view of part A;

[0052] Fig. 9 A schematic diagram of the arrangement of a screw sleeve penetrating a reinforced sealing plate according to an embodiment of the present invention;

[0053] Fig.10 It is a schematic diagram of the relative arrangement of the reinforcing sealing plate, the screw connection member and the side reinforcing plate according to an embodiment of the present invention;

[0054] Fig.11 It is a structural schematic diagram of a screw connection member according to an embodiment of the present invention;

[0055] Fig.12 It is a schematic structural diagram of a side reinforcement plate according to an embodiment of the present invention;

[0056] Fig.13 A schematic diagram of the connection between the screw connection member and the side reinforcement plate according to an embodiment of the present invention;

[0057] Fig.14 for Fig.13 A schematic diagram of the structure shown from another perspective;

[0058] Fig.15 This is a schematic structural diagram of a reinforced sealing plate according to an embodiment of the present invention;

[0059] Fig.16 It is a schematic diagram of the collision force transmission of the first annular reinforcement structure according to an embodiment of the present invention during a head-on collision;

[0060] Fig.17 A schematic diagram of the cooperation between the lower cross beam of the rear floor and the rear floor frame according to an embodiment of the present invention;

[0061] Fig.18 This is a schematic structural diagram of the lower cross beam of the rear floor according to an embodiment of the present invention;

[0062] Fig.19 It is a schematic diagram of the structure of the front cavity of the longitudinal beam and the side cavity of the lower cross beam according to an embodiment of the present invention;

[0063] Fig. 20 It is a schematic diagram of the structure of the middle cross beam cavity and the lower cross beam middle cavity according to an embodiment of the present invention;

[0064] Fig.21 A schematic diagram of the middle channel arrangement according to an embodiment of the present invention;

[0065] Fig. 22 It is a schematic diagram of the structure of the front seat installation crossbeam according to an embodiment of the present invention;

[0066] Fig.23 It is a structural schematic diagram of the beam body according to an embodiment of the present invention;

[0067] Fig.24 for Fig.17 A partial enlarged view of part B;

[0068] Fig.25 It is a structural schematic diagram of a nut plate according to an embodiment of the present invention;

[0069] Fig.26 This is a schematic diagram of the structure of the bottom plate according to an embodiment of the present invention;

[0070] Fig. 27 It is a schematic diagram of the collision force transmission of the second annular reinforcement structure according to an embodiment of the present invention during a head-on collision;

[0071] Description of reference numerals:

[0072] 1. Rear floor assembly; 2. Door sill beam; 3. Front floor panel; 4. Front cabin longitudinal beam; 5. Front seat mounting crossbeam; 6. Rear floor lower crossbeam; 7. Torque box; 8. Cabin rear crossbeam; 9. Nut plate; 10. Front floor upper longitudinal beam; 11. Front wall longitudinal beam; 12. Front wall panel; 13. Front wall lower panel; 14. Front wall lower crossbeam; 15. Strengthening sealing plate; 16. Bolted parts; 17. Side reinforcement plate; 18. Middle channel;

[0073] 100, rear floor frame; 200, rear floor panel; 300, rear floor front crossbeam reinforcement plate; 200a, longitudinal beam cover plate; 101, rear floor longitudinal beam; 101a, front section; 101b, rear section; 102, rear floor middle crossbeam; 103, rear floor front crossbeam; 104, rear floor rear crossbeam; 2a, rear door sill beam; 2b, installation through hole; 501, front installation crossbeam; 502, rear installation crossbeam; 5a, crossbeam body; 5b, connecting beam; 5c, crossbeam body; 6a, lower The side of the lower crossbeam; 6b, the middle of the lower crossbeam; 901, the bottom plate; 901a, the collapse plate; 901b, the connection part; 901c, the through hole; 902, the welding nut; 1601, the support plate; 1602, the screw sleeve; 1603, the threaded connection hole; 1604, the notch; 1501, the annular reinforcement rib body; 1502, the linear reinforcement rib body; 1503, the through hole; 1504, the strip reinforcement rib; 1701, the connection flange; 1702, the groove; 18a, the middle channel body;

[0074] M, upper cavity; N, lower cavity; S, upper longitudinal beam cavity; Q, front surround longitudinal beam cavity; G, longitudinal beam front section cavity; H, lower cross beam side cavity; E, middle cross beam cavity; F, lower cross beam middle cavity; k, crush deformation zone. DETAILED DESCRIPTION

[0075] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0076] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., 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", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0077] In addition, in the description of the present invention, unless otherwise clearly defined, the mating parts may be connected by conventional connection structures in the art. Moreover, 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 a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0078] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0079] Embodiment 1

[0080] This embodiment relates to a vehicle body reinforcement structure, combined with Figures 1 to 3 As shown in the figure, it includes a rear floor frame 100 in a rear floor assembly 1, upper front floor longitudinal beams 10 arranged on the left and right sides, and a front enclosure lower cross beam 14, and also includes a rear floor lower cross beam 6 connected to the bottom of the above-mentioned rear floor frame 100, door sill beams 2 arranged on the left and right sides, and a torsion box 7 respectively connected to the rear ends of the front cabin longitudinal beams 4 on the left and right sides.

[0081] The rear ends of the upper longitudinal beams 10 on both sides of the front floor are connected to the rear floor frame 100, and the front ends of the upper longitudinal beams 10 on both sides of the front floor are connected to the lower cross beam 14 through the front longitudinal beam 11. At the same time, the rear floor frame 100, the lower cross beam 14, and the upper longitudinal beams 10 and the front longitudinal beam 11 on both sides of the front floor are also connected to form a first annular reinforcement structure.

[0082] The left and right sides of the rear floor lower cross beam 6 are respectively connected to the rear ends of the corresponding side sill beams 2, and each side torsion box 7 is connected to the front end of the sill beam 2 on the same side, and a cabin rear section cross beam 8 is connected between the torque boxes 7 on both sides. The rear floor lower cross beam 6, the cabin rear section cross beam 8, and the sill beams 2 and torsion boxes 7 on both sides are also connected to form a second annular reinforcement structure.

[0083] At this time, as the above structural design makes the rear floor frame 100 connected to the rear end of the front floor upper longitudinal beam 10, the front end of the front floor upper longitudinal beam 10 is connected to the front enclosure lower cross beam 14 through the front enclosure longitudinal beam 11, and the rear floor frame 100, the front enclosure lower cross beam 14, and the front floor upper longitudinal beam 10 and the front enclosure longitudinal beam 11 on both sides are connected to form a first annular reinforcement structure, and by setting the rear floor lower cross beam 6, the torsion boxes 7 on both sides are connected through the cabin rear section cross beam 8, and at the same time, the rear floor lower cross beam 6, the cabin rear section cross beam 8, and the door sill beams 2 and the torsion box 7 on both sides are connected to form a second annular reinforcement structure.

[0084] This embodiment can not only utilize the high strength of the annular structure to increase the structural strength and torsional rigidity of the vehicle body and improve the structural strength and torsional rigidity of the bottom of the vehicle body, but also utilize the annular structure to form two upper and lower annular force transmission channels in the vehicle body, thereby facilitating the transmission and dispersion of the collision force in the vehicle body.

[0085] Specifically, continue to Figures 4 to 6 , and combined with Fig.16 As shown, as a preferred implementation form, the rear floor frame 100 of this embodiment has rear floor longitudinal beams 101 arranged on the left and right sides, and a reinforcing sealing plate 15 is arranged in each side rear floor longitudinal beam 101. The reinforcing sealing plates 15 on both sides extend along the front and rear directions of the entire vehicle, and the front end of each reinforcing sealing plate 15 extends out from the front end of the rear floor longitudinal beam 101 on the same side.

[0086] Thus, based on the arrangement of the above-mentioned reinforcing sealing plate 15, the rear end of the upper longitudinal beam 10 on each side of the front floor of this embodiment is specifically connected to the front end of the reinforcing sealing plate 15 on the same side, so that the rear end of the upper longitudinal beam 10 on each side of the front floor is connected to the rear floor frame 100 through the reinforcing sealing plate 15 on the same side. Moreover, it can be understood that, by the arrangement of the reinforcing sealing plate 15, the structural strength of the rear floor longitudinal beam 101 can also be increased, and the connection between the upper longitudinal beam 10 on the front floor and the rear floor frame 100 can be facilitated.

[0087] As a preferred implementation form, on the basis of providing the reinforcement sealing plate 15, in this embodiment, each reinforcement sealing plate 15 also separates an upper cavity M and a lower cavity N located above and below the reinforcement sealing plate 15 in the same side rear floor longitudinal beam 1. At the same time, the rear end of each side reinforcement sealing plate 15 is also arranged corresponding to the front mounting portion of the rear subframe in the same side rear floor longitudinal beam 101.

[0088] In this way, the reinforcing sealing plate 15 is separated into an upper cavity M and a lower cavity N in the rear floor longitudinal beam 101, and the rear end of the reinforcing sealing plate 15 is arranged corresponding to the front mounting portion of the rear sub-frame. On the one hand, the formed double cavity structure can be used to increase the structural strength of the rear floor longitudinal beam 101 and improve the collision force transmission capacity of the rear floor longitudinal beam 101. On the other hand, the dynamic stiffness of the rear sub-frame mounting point can also be improved, which is beneficial to improving the handling and comfort of the whole vehicle.

[0089] In this embodiment, the front floor upper longitudinal beam 10 is located above the front floor panel 3 and extends in the front-to-back direction of the vehicle, the front wall longitudinal beam 11 is connected above the front wall lower panel 13, and the front wall lower panel 13 is connected between the front wall panel 12 and the front floor panel 3. In addition, the rear end of the front cabin longitudinal beam 4 in the front cabin and the front end of the front wall longitudinal beam 11 are respectively arranged at the front and rear sides of the front wall panel 12, and the front wall longitudinal beam 11 and the front cabin longitudinal beam 4 are connected in the front-to-back direction of the vehicle.

[0090] It can be understood that by strengthening the connection between the sealing plate 15, the front floor upper longitudinal beam 10, the front surround longitudinal beam 11 and the front engine compartment longitudinal beam 3, a continuous force transmission channel can be formed in the front and rear directions of the vehicle. In this way, it can cooperate with the force transmission channel formed by the door sill beam 2 to form a dual-channel force transmission structure in the vehicle body, which is beneficial to the transmission and dispersion of the collision force in the vehicle body.

[0091] In addition, it should be noted that the connection setting between the above-mentioned front enclosure longitudinal beam 11 and the front engine compartment longitudinal beam 4, that is, the projections of the two in the front and rear directions of the entire vehicle at least partially overlap, so that a reliable force transmission channel can be formed between the front engine compartment longitudinal beam 4 and the front enclosure longitudinal beam 11, so that the collision force can be transmitted along the front and rear directions of the entire vehicle using the new force transmission channel.

[0092] In this embodiment, on the basis of providing the longitudinal beam 10 on the front floor and the longitudinal beam 11 on the front wall, still refer to Fig.16 As shown in the figure, as a preferred embodiment, an upper longitudinal beam cavity S is formed between the upper longitudinal beam 10 and the front floor panel 3 on the front floor, and a front wall longitudinal beam cavity Q is formed between the front wall longitudinal beam 11 and the front wall lower panel 13. Moreover, the front end of the upper longitudinal beam cavity S is connected to the front wall longitudinal beam cavity Q, and the rear end of the upper longitudinal beam cavity S is connected to the lower cavity N.

[0093] At this time, through the setting of the above upper longitudinal beam cavity S and the front enclosure longitudinal beam cavity Q, the structural strength of the front floor upper longitudinal beam 10 and the front enclosure longitudinal beam 11 can also be improved by utilizing the high strength of the cavity structure. The upper longitudinal beam cavity S is connected with the front enclosure longitudinal beam cavity Q and the lower cavity N, which can also improve the longitudinal (vehicle front and rear direction) force transmission channel formed by the front enclosure longitudinal beam 11, the front floor upper longitudinal beam 10 and the rear floor longitudinal beam 101. The penetration is also beneficial to improving the collision force transmission effect.

[0094] As a preferred implementation form, in this embodiment, the rear floor longitudinal beams 101 on both sides are integrally formed in the rear floor frame 100, and the top of each side rear floor longitudinal beam 101 is covered with a longitudinal beam cover plate 200a. Among them, the rear floor longitudinal beam 101 and the reinforcement sealing plate 15 are enclosed to form a lower cavity N, and the rear floor longitudinal beam 101, the reinforcement sealing plate 15 and the longitudinal beam cover plate 200a are enclosed to form an upper cavity M. In addition, by covering the longitudinal beam cover plate 200a on the top of the rear floor longitudinal beam 101, it can also improve the structural performance of the rear floor longitudinal beam 101 and facilitate the formation of the upper cavity M.

[0095] In this embodiment, as a preferred implementation form, the rear floor frame 100 is further formed with a rear floor front cross beam 103, a rear floor middle cross beam 102 and a rear floor rear cross beam 104 connected between the rear floor longitudinal beams 101 on both sides. Moreover, it should be pointed out that, for the rear floor frame 100 of this embodiment, it can adopt a conventional sheet metal welding structure, however, as a preferred implementation form, combined with Figure 5 and Figure 6 As shown, the rear floor frame 100 of this embodiment can be prepared by an integrated thermoforming process. In this way, the rear floor frame 100 is integrally thermoformed, which is beneficial to the forming of the rear floor frame 100 and can also ensure the structural strength of the rear floor frame 100.

[0096] One-piece hot forming is a molding process frequently used in existing car body manufacturing. It usually involves heating the steel plate to make it evenly austenitized, and then sending it into a mold with an internal cooling system for stamping and molding. Finally, by cooling, the austenite is transformed into martensite, etc., to complete the molding process. Through the above molding process, the prepared car body parts can be hardened, thereby greatly improving their strength.

[0097] In particular, in the specific implementation, it is also preferred to adopt a laser welding hot forming process, that is, before the hot stamping forming process, the plates of different materials, plate thicknesses, and coatings are assembled and welded to form an integral plate by laser welding technology. Then, the integral plate is hot stamped to prepare the rear floor frame 100. Laser welding can solve the requirements for process performance of ultra-wide plates and different parts of the rear floor frame 100, and has a good effect in reducing the weight of the vehicle body, reducing the cost of the whole vehicle, and saving energy and environmental protection.

[0098] In this embodiment, the longitudinal beam cover 200a covering the top of the rear floor longitudinal beam 101 is specifically a part of the rear floor panel assembly, and usually, the longitudinal beam cover 200a at the rear floor longitudinal beams 1 on both sides and the middle rear floor panel 200 together constitute the rear floor panel assembly. The rear floor panel assembly and the above-mentioned rear floor frame 100, as well as the rear sill beam 2a connected to the outer side of the front section of the rear floor longitudinal beams 101 on both sides, can be combined into the rear floor assembly in the vehicle body.

[0099] In addition, as a preferred structural form, continue as Figures 7 to 14 As shown in , the front mounting portion of the rear subframe of the present embodiment includes a bolt connection member 16 disposed in the rear floor longitudinal beam 101 , and the bolt connection member 16 is specifically located in the lower cavity N.

[0100] In terms of specific structure, the screw connection member 16 is integrally formed and comprises a support plate 1601 and a screw sleeve 1602 having one end connected to the support plate 1601. The support plate 1601 is connected to the rear floor longitudinal beam 101, a screw sleeve 1602 is provided with a screw connection hole 1603, and the screw connection hole 1603 penetrates the support plate 1601, and a connection through hole corresponding to the screw connection hole 1603 is also provided at the bottom of the rear floor longitudinal beam 101.

[0101] It is understandable that by forming the screw connector 16 in one piece, there is no welding connection structure between the support plate 1601 and the screw sleeve 1602 in the screw connector 16, so that rust will not occur at the connection position between the two, which can improve the overall rust resistance of the screw connector 16. In addition, by forming the screw connector 16 in one piece, the structural strength of the screw connector 16 itself can be guaranteed, which is conducive to improving its reliability in use.

[0102] In this embodiment, as a preferred implementation, during the specific preparation, the screw connection 16 can be integrally stamped. Moreover, in the specific setting, the support plate 1601 can be, for example, extended along the length direction of the rear floor longitudinal beam 101, and the bottom end of the screw sleeve 1602 is connected to the middle of the support plate 1601. Here, the screw connection 16 is formed by integral stamping, which can ensure the structural strength and toughness of the screw connection 16 and increase the reliability of the screw connection 16 structure. Moreover, in the specific molding process, after the screw connection 16 is stamped and formed through multiple processes, the threaded connection hole 1603 can be processed by a tapping machine.

[0103] In addition, in a specific implementation, the material thickness of the screw connector 16 can range from 2.5 to 3 mm. For example, the thickness of the support plate 1301 in the screw connector 16 is 2.5 mm, 2.8 mm or 3 mm. At the same time, the screw connector 16 is preferably made of DC series steel or high-strength steel, and when the screw connector 16 is made of high-strength steel, the strength of the material is generally below 1000 Mpa to avoid the difficulty in forming the screw connector 16 due to too high strength, and the occurrence of the problem that the screw sleeve 1602 is too brittle and easy to break.

[0104] As a preferred connection method, the support plate 1601 in this embodiment can be spot welded to the rear floor longitudinal beam 101. At this time, the support plate 1601 is spot welded to the rear floor longitudinal beam 101, which can reduce the damage to the support plate 1601 and the rear floor longitudinal beam 101, avoid the ablation failure caused by the double welding in the prior art, improve the torsion resistance of the screw connection 16 after connection, and ensure the reliability of the screw connection 16 in the rear floor longitudinal beam 101.

[0105] In order to further improve the spot welding effect between the support plate 1601 and the rear floor longitudinal beam 101, the present embodiment may further provide a U-shaped notch 1604 at the edge of one end of the support plate 1601 to increase the number of welding points, thereby improving the welding strength between the support plate 1601 and the rear floor longitudinal beam 101. Of course, according to specific use requirements, the notch 1604 may also be provided at other locations and in other shapes.

[0106] In this embodiment, as a preferred implementation, one end of the screw sleeve 1602 away from the support plate 1601 also penetrates the reinforcement sealing plate 15 and extends into the longitudinal beam upper cavity M, and the screw sleeve 1602 is also connected to the reinforcement sealing plate 15. At this time, one end of the screw sleeve 1602 penetrates the reinforcement sealing plate 15 and is connected to the reinforcement sealing plate 15, and the reinforcement sealing plate 15 can be used to increase the stability of the screw connection 16, which helps to improve the rigidity of the front mounting portion of the rear subframe.

[0107] In a specific implementation, as an example of arrangement, the distance between the end of the screw sleeve 1602 extending into the upper cavity M and the reinforcing sealing plate 15 can be set within 10 mm. Such a setting can increase the height of the cavity along the axial direction of the screw sleeve 1602, help increase the cross-sectional size of the lower cavity N, and improve the overall structural strength of the rear floor longitudinal beam 101 after the reinforcing sealing plate 15 is set.

[0108] In this embodiment, continue to combine Fig. 9 and Fig.15 As shown, as a preferred structural form, the portion of the reinforcing sealing plate 15 where the screw sleeve 1602 extends into the upper cavity M is also provided with reinforcing ribs. At this time, in terms of specific structure, the reinforcing ribs include an annular reinforcing rib body 1501 and a plurality of linear reinforcing rib bodies 1502 connected to the annular reinforcing rib body 1501.

[0109] The reinforcing sealing plate 15 is provided with a through hole 1503 for the end of the screw sleeve 1602 to pass through, the annular reinforcing rib 1501 is formed at the edge of the through hole 1503 and is arranged around the screw sleeve 1602, and the plurality of linear reinforcing ribs 1502 are arranged radially with the annular reinforcing rib 1501 as the center. Moreover, the number of linear reinforcing ribs 1502 can be set to Fig. 9 and Fig.15 In addition to the quantities shown Fig. 9 and Fig.15 In addition to the quantities shown, they can also be determined based on usage requirements.

[0110] In the present embodiment, it can be understood that the reinforcement ribs are composed of an annular reinforcement rib body 1501 and a radially arranged linear reinforcement rib body 1502, which can enhance the ability of the screw sleeve 1602 located in the middle position to resist deformation, further increase the overall stiffness of the screw sleeve 16, and reduce the deformation of the screw sleeve 1602 during movement, thereby enhancing the reliability performance of the screw sleeve 16.

[0111] In addition to the above-mentioned reinforcing ribs, as a preferred implementation form, the present embodiment further provides a plurality of strip reinforcing ribs 1504 extending along the length direction of the reinforcing sealing plate 15, wherein one of the strip reinforcing ribs 1504 extends to connect with the corresponding linear reinforcing rib 1502. The strip reinforcing ribs 1504 here can strengthen the structure of the reinforcing sealing plate 15, and the structure is simple and easy to process and shape.

[0112] In order to further improve the strength of the front mounting point of the rear subframe, as a preferred implementation form, the front mounting portion of the rear subframe of this embodiment further includes a side reinforcing plate 17 located in the lower cavity N. At least one side of the side reinforcing plate 17 is connected to the rear floor longitudinal beam 101, and the side reinforcing plate 17 is arranged side by side on one side of the screw sleeve 1602, and the screw sleeve 1602 is also connected to the side reinforcing plate 17. Here, by providing the side reinforcing plate 17, the strength of the lower cavity N can be increased, the overall strength of the position where the screw connection is located can be improved, and the reliability of the installation of the rear subframe can be improved.

[0113] In terms of specific structure, the side reinforcing plate 17 is extended along the width direction of the rear floor longitudinal beam 101 and can be located at the front side or the rear side of the screw sleeve 1602. In addition, in this embodiment, a connecting flange 1701 is also provided on the side reinforcing plate 17, and the side reinforcing plate 17 can be connected to the rear floor longitudinal beam 101 through the connecting flange 1701. In this way, the side reinforcing plate 17 is connected to the rear floor longitudinal beam 101 through the connecting flange 1701, which can not only increase the structural strength of the side reinforcing plate 17 itself, but also improve the reliability of the connection between the side reinforcing plate 17 and the rear floor longitudinal beam 101.

[0114] As an example of arrangement of the connection flange 1701, in this embodiment, the connection flange 1701 can be arranged at the bottom and both sides of the side reinforcing plate 17. The connection flange 1701 located on one side is used to connect with the reinforcing sealing plate 15. The connection flange 1701 located at the bottom is located on part of the support plate 1601 and is welded to the support plate 1601 and the rear floor longitudinal beam 101. Of course, in specific implementation, the setting position and number of the connection flange 1701 can also be adjusted according to the connection requirements.

[0115] In addition, as a preferred implementation form, in this embodiment, a groove 1702 is further formed on the side reinforcing plate 17, and the screw sleeve 1602 is connected in the groove 1702, and the groove 1702 is arranged in accordance with the screw sleeve 1602, and for example, the groove 1702 is in an arc shape that matches the outer peripheral wall of the screw sleeve 1602. The above arrangement can make the side reinforcing plate 17 fit with the screw sleeve 1602, which can facilitate the connection between the two, and can ensure the stability of the connection between the screw sleeve 1602 and the side reinforcing plate 17. At the same time, the groove 1702 can also position the installation of the side reinforcing plate 17.

[0116] In this embodiment, the side reinforcement plate 17 is preferably connected to the screw connection member and the rear floor longitudinal beam 101 by double welding to further improve the connection strength.

[0117] As a preferred implementation form, in this embodiment, the torsion boxes 7 on both sides are in a "human" shaped structure, the front end of each torsion box 7 is connected to the bottom of the rear end of the front cabin longitudinal beam 4 on the same side, one side of the rear end of each torsion box 7 is connected to the front end of the door sill beam 2, and the other side is connected to the cabin rear section cross beam 8. In specific implementation, the above-mentioned torsion box 7 can adopt a conventional structure in existing vehicle models, and it is usually connected to the front cabin longitudinal beam 4, the door sill beam 2 and the cabin rear section cross beam 8 by welding.

[0118] The cabin rear cross beam 8 is specifically connected to the front end of the front floor panel 3 and is located at the bottom of the front floor panel 3, and the cabin rear cross beam 8 is also arranged across the middle channel 18 at the bottom to achieve the connection between the torsion boxes 7 on both sides. In specific implementation, the cabin rear cross beam 8 of this embodiment can adopt the beam structure commonly used in existing models, and it can be, for example, a sheet metal welding structure, or it can also be made of extruded aluminum.

[0119] In addition, see Figure 3 As shown, the rear floor lower cross beam 6 of this embodiment is also specifically in the shape of a "C" with the opening facing forward, and continues to be combined with Fig.17 As shown, based on the arrangement of the rear floor middle cross beam 102 in the rear floor frame 100 described above, the rear floor lower cross beam 6 is also specifically connected between the front section 101a of the rear floor longitudinal beams 101 on both sides and the rear floor middle cross beam 102. In this way, by connecting the rear floor lower cross beam 6 between the front section 101a of the rear floor longitudinal beams 101 on both sides and the rear floor middle cross beam 102, the strength and rigidity of the front position of the rear floor assembly 1 can be increased, and the stability of the installation of the rear end of the battery pack or the fuel tank in the vehicle body can be improved. At the same time, the structural strength of the rear floor frame 100 can also be increased, which helps to improve the torsional rigidity of the rear floor assembly 1 as a whole.

[0120] In this embodiment, the rear floor front cross beam 103 is specifically connected between the front sections 101a of the rear floor longitudinal beams 101 on both sides, and the rear floor front cross beam 103, the rear floor middle cross beam 102 and the rear floor longitudinal beams 101 on both sides are connected to form a ring structure. In this way, by connecting the rear floor front cross beam 103, the rear floor middle cross beam 102 and the rear floor longitudinal beams 101 on both sides to form a ring structure, the structural strength of the front part of the rear floor frame 100 can be improved by utilizing the high strength of the ring structure.

[0121] In addition, the rear floor rear cross beam 104 of the present embodiment is connected between the rear sections 101b of the rear floor longitudinal beams 101 on both sides. Meanwhile, the rear floor middle cross beam 102 is also specifically connected to the transition area between the front section 101a and the rear section 101b of the rear floor longitudinal beams 101 on each side, so that the rear floor front cross beam 103 and the rear floor rear cross beam 104 are respectively arranged on the front and rear sides of the rear floor middle cross beam 102.

[0122] Similar to the rear floor front cross beam 103, in this embodiment, the rear floor rear cross beam 104, the rear floor middle cross beam 102 and the rear floor longitudinal beams 101 on both sides are also connected to form an annular structure. In this way, by connecting the rear floor rear cross beam 104, the rear floor middle cross beam 102 and the rear floor longitudinal beams 101 on both sides to form an annular structure, the rigidity of the rear floor frame 100 can be better improved by using a double annular structure based on the annular structure formed by the rear floor front cross beam 103.

[0123] It should be noted that the longitudinal beam cover 200a covers the top of the rear floor longitudinal beam 101, thereby forming a longitudinal beam cavity inside the rear floor longitudinal beam 101, thereby improving the overall structural strength of the rear floor longitudinal beam 101. In this embodiment, based on the covering of the rear floor panel 200, of course, a beam cavity can also be formed around the rear floor middle cross beam 102 and the rear floor rear cross beam 104 to improve the structural strength of the rear floor middle cross beam 102 and the rear floor rear cross beam 104.

[0124] At the rear floor front cross beam 103, a rear floor front cross beam reinforcement plate 300 can be further provided. The rear floor front cross beam reinforcement plate 300 is connected between the rear sill beams 2a at the rear ends of the sill beams 2 on both sides, and also forms a cavity structure with the rear floor front cross beam 103, the rear floor panel 200, etc., so as to increase the structural strength of the rear floor front cross beam 103.

[0125] Of course, when the rear floor front cross beam reinforcement plate 300 is provided, the front ends of the reinforcement sealing plates 15 on both sides extend out from the bottom of the rear floor front cross beam reinforcement plate 300 and are connected to the rear ends of the corresponding front floor upper longitudinal beams 10. In addition, by connecting the rear floor front cross beam reinforcement plate 300 with the sill beams 2 on both sides, a lateral (vehicle left-right direction) force transmission channel intersecting with the front floor upper longitudinal beams 10, the reinforcement sealing plates 15, the rear floor longitudinal beams 101, etc. can also be formed, which helps to improve the dispersion effect of the collision force in the vehicle body.

[0126] In addition, as a preferred implementation form, the front mounting portion of the rear subframe on each side of the present embodiment is also located at the area where the rear floor longitudinal beam 101 intersects and connects with the rear floor middle cross beam 102. In this way, the front mounting portion of the rear subframe is located at the area where the rear floor longitudinal beam 101 intersects and connects with the rear floor middle cross beam 102, so that the rigidity of the front mounting point of the rear subframe can be improved with the help of the rear floor middle cross beam 102, which helps to improve the reliability of the installation of the rear subframe.

[0127] In this embodiment, as mentioned above, a rear sill beam 2a is provided at the rear end of each side sill beam 2, and each side sill beam 2 is connected to the rear floor longitudinal beam 101 on the same side through the rear sill beam 2a. Moreover, as the rear end portion of the sill beam 2, the rear sill beam 2a mainly functions to connect with the rear floor longitudinal beam 101 and the C-pillar, etc., and in terms of specific structure, the rear end of the rear sill beam 2a is usually connected with the rear floor longitudinal beam 101, the longitudinal beam cover 200a and the front end of the rear wheel housing, etc., so as to form a stable structure.

[0128] In this embodiment, the rear sill beam 2a on each side is connected to the front section 101a of the rear floor longitudinal beam 101 on the same side, and the left and right sides of the rear floor lower cross beam 6 are also connected to the rear sill beam 2a on the corresponding side. In this way, it can be understood that by providing the rear sill beam 2a and connecting the rear floor lower cross beam 6 with the rear sill beams 2a on both sides, it is possible to establish a connection between the rear floor lower cross beam 6 and the sill beams on both sides of the vehicle body, thereby improving the setting effect of the rear floor lower cross beam 6.

[0129] In this embodiment, the structure of the rear floor lower cross beam 6 is as follows: Fig.18 As shown, for the convenience of description, the "C"-shaped rear floor lower cross beam 6 can be divided into lower cross beam side portions 6a on the left and right sides, and lower cross beam middle portion 6b located in the middle. The lower cross beam side portions 6a on both sides are mainly connected to the front sections 101a of the rear floor longitudinal beams 101 on both sides, and the rear door sill beams 2a on both sides, and the lower cross beam middle portion 6b in the middle is mainly connected to the rear floor middle cross beam 102.

[0130] In order to better increase the structural strength of the two sides of the front part of the rear floor assembly 1, continue as follows Fig.19As shown in FIG. 1 , taking one side as an example, in this embodiment, a longitudinal beam front section cavity G is also formed between each side front section 101a, the rear sill beam 2a and the rear floor panel 200, and a lower cross beam side cavity H is formed between each side front section 101a, the rear sill beam 2a and the rear floor lower cross beam 6. The longitudinal beam front section cavity G and the lower cross beam side cavity H are stacked in the vertical direction of the vehicle.

[0131] At this time, by forming the longitudinal beam front section cavity G and the lower cross beam side cavity H stacked up and down, the double cavity structure can be used to increase the structural strength of the two sides of the front of the rear floor assembly 1.

[0132] Based on the above longitudinal beam front cavity G and lower cross beam side cavity H, in this embodiment, preferably, continue as follows Fig. 20 As shown, a middle cross beam cavity E is formed between the rear floor middle cross beam 102 and the rear floor panel 200. At the same time, a lower cross beam middle cavity F is formed between the rear floor lower cross beam 6 and the rear floor middle cross beam 102. The middle cross beam cavity E and the lower cross beam middle cavity F are also stacked in the upper and lower directions of the vehicle.

[0133] In this way, by forming a middle cross beam cavity E and a lower cross beam middle cavity F which are also stacked up and down, the double cavity structure can also be utilized to increase the structural strength of the middle front position of the rear floor assembly. At the same time, it can also cooperate with the double cavity structures on both sides to improve the dynamic stiffness of the front mounting point of the rear subframe and improve the collision performance of the rear part of the vehicle body.

[0134] In this embodiment, preferably, the vehicle involved can be a new energy vehicle, and thus the vehicle body also includes a battery pack. At the same time, the front end of the battery pack can be connected to the rear crossbeam 8 of the cabin and the torsion boxes 7 on both sides, the left and right sides of the battery pack are respectively connected to the door sill beam 2 on the corresponding side, and the rear end of the battery pack can be connected to the lower crossbeam 6 of the rear floor.

[0135] It can be understood that by connecting the battery pack to each beam and the torsion box 7 respectively so as to be arranged in the vehicle body, not only the installation arrangement of the battery pack in the vehicle body can be realized, but also the annular structure formed by each beam and the torsion box 7 can be utilized to improve the reliability of the battery pack installation.

[0136] When a battery pack is provided, as a further preferred implementation form, in this embodiment, for example, sealing rings may be provided between the top of the battery pack and the rear floor lower cross beam 6, the cabin rear section cross beam 8, and the door sill beams 2 and the torsion box 7 on both sides. Moreover, based on this, the top of the battery pack also constitutes the front floor panel 3 located between the door sill beams 2 on both sides, and the rear floor front panel located in front of the rear floor lower cross beam 6.

[0137] The above-mentioned rear floor front panel is the portion of the rear floor panel 200 between the rear floor middle cross beam 102 and the rear floor front cross beam 103. Moreover, by making the top of the battery pack constitute the front floor panel 3 and the rear floor front panel, the existing front floor panel 2 and the rear floor front panel can be eliminated, so that the battery pack is integrated with the vehicle body, which is conducive to reducing vehicle body parts and contributing to the lightweight design of the vehicle body and the reduction of manufacturing costs. Of course, a sealing ring is provided between the top of the battery pack and each beam body and the torsion box 7, so that the sealing inside the vehicle can be ensured when the top of the battery pack is used as the front floor panel 3 and the rear floor front panel.

[0138] It should be noted that, in addition to using the top of the battery pack as the front floor panel 3 and the rear floor front panel, in the specific implementation, the front floor panel 2 and the rear floor front panel are still provided in the vehicle body, which is also possible. Moreover, when the rear floor front panel is replaced by the top of the battery pack, the middle part of the rear floor panel 200 is only arranged to the position of the rear floor middle cross beam 102, and the parts on both sides as the longitudinal beam cover 200a are still arranged to the front end of the rear floor longitudinal beam 101.

[0139] In this embodiment, Figure 1 and Figure 2 , and combined with Fig.21 As shown in FIG. 1 , a front seat mounting cross beam 5 is connected between the door sill beams 2 on both sides, and the vehicle body reinforcement structure of this embodiment also includes a central channel 18 extending along the front-rear direction of the vehicle.

[0140] The front row seat mounting cross beam 5 specifically includes a front mounting cross beam 501 and a rear mounting cross beam 502 which are arranged at intervals along the front and rear direction of the vehicle, and the front mounting cross beam 501 and the rear mounting cross beam 502 are both connected from the threshold beam 2 on one side to the threshold beam 2 on the other side. The front end of the middle channel 18 is connected to the front enclosure lower cross beam 14, and the rear end of the middle channel 18 is connected to the front mounting cross beam 501 in the front row seat mounting cross beam 5.

[0141] It can be understood that making each front seat mounting cross beam 5 a through structure can ensure the continuity of the force transmission channel formed by the front seat mounting cross beam 5, which is beneficial to improving the side impact force transmission capacity.

[0142] In the specific implementation, as a preferred implementation form, continue to combine Fig. 22 and Fig.23 As shown in the figure, taking the front mounting cross beam 501 as an example, each front seat mounting cross beam 5 of this embodiment includes a cross beam body 5a, and connecting beams 5b connected to the left and right ends of the cross beam body 5a, and the connecting beams 5b at both ends are specifically connected to the door sill beams 2 on both sides.

[0143] In addition, as a preferred implementation form, the cross beam body 5a of this embodiment can also be formed by a rolling process, and in terms of structure, the cross beam body 5a can be set to have a plurality of cross beam bodies 5c connected in sequence along the front-to-back direction of the vehicle, and the cross section of each cross beam body 5c is also in the shape of a "J". At this time, the cross beam body 5a in the front seat mounting cross beam 5 is formed by a rolling process, and the cross beam body 5a is composed of a plurality of cross beam bodies 5c with a cross section in the shape of a "J", which can increase the structural strength of the front seat mounting cross beam 5 itself, help improve the stability of the front seat setting, and also help improve the torsional rigidity of the middle part of the vehicle body, and the collision force transmission effect of the front seat mounting cross beam 5.

[0144] In this embodiment, as a preferred implementation form, the above-mentioned middle channel 18 also has a plurality of middle channel bodies 18a connected in sequence along the left and right directions of the vehicle in terms of structure, and Fig.23 The cross-sectional structure of the cross beam body 5a shown in the figure, the cross-sectional shape of each middle channel body 18a is also "J" shaped. In this way, the middle channel 18 is composed of the middle channel bodies 18a connected in sequence and having a "J" shaped cross-sectional shape, so that the cross-sectional shape of the middle channel 18 along the left and right direction of the whole vehicle is a wave-like structure, which can increase the cross-sectional area of ​​the middle channel 18, improve the structural strength of the middle channel 18 itself, and help improve the collision force transmission performance of the middle channel 18.

[0145] Of course, in the specific implementation, in order to facilitate the connection between the front end of the middle channel 18 and the lower cross beam 14 of the front wall, the front end of the middle channel 18 can have an end structure with a cross section that is also in the shape of a "J", and the front end of each middle channel body 18a is as follows: Fig.21 The illustrated embodiment is connected to the end structure, which is also connected to the cowl lower cross member 14 .

[0146] It is worth noting that, in specific implementation, the battery pack mounting points located on the lower cross beam 6 of the rear floor, the torsion box 7 and the cross beam 8 of the rear section of the cabin can generally adopt conventional mounting structure forms such as threaded sleeves or convex welded nuts.

[0147] As for the battery pack installation point on the door sill beam 2, it can of course also adopt a conventional threaded sleeve or projection welding nut. However, as a preferred embodiment, combined with Figure 24 to Figure 26 As shown in the figure, and taking the battery pack installation point at the rear sill beam 2a as an example, the battery pack installation point located at the sill beam 2 specifically includes a mounting through hole 201 provided on the rear sill beam 2a, and a nut plate 9 provided in the rear sill beam 2a.

[0148] The above-mentioned mounting hole 201 is a long hole extending in the left-right direction of the vehicle, and the nut plate 9 has a bottom plate 901 and a welding nut 902 arranged on the bottom plate 901. At the same time, the bottom plate 901 is also connected to the crush plate 901a through a deformable connecting portion 901b, and the welding nut 902 is welded on the crush plate 901a, and when the connecting portion 901b is deformed, the welding nut 902 can move relative to the bottom plate 901 along the length direction of the mounting hole 201.

[0149] In this way, by making the battery pack mounting point at the door sill beam 2 consist of a long strip-shaped mounting through hole 201 and a nut plate 9 having a base plate 901 and a welding nut 902, and the welding nut 902 can move relative to the base plate 901 along the length direction of the mounting through hole 201, this embodiment can achieve the collapse displacement of the side mounting point of the battery pack when the vehicle has a side collision, which is beneficial to reduce the collision impact on the battery pack and improve the safety of the battery pack.

[0150] In this embodiment, for the nut plate 9, more specifically, see Fig.25 and Fig.26 As shown, as an exemplary structural form, a through hole 901c is provided on the bottom plate 901, and one side of the through hole 901c also passes through the bottom plate 901, and at the same time, the crush plate 901a is located in the above-mentioned through hole 901c, and the crush plate 901a is located at both ends of the mounting hole 201 in the length direction (left and right direction of the whole vehicle), one end of which is connected to the bottom plate 901 through the connecting portion 901b, and the other end forms a crush deformation zone k between the inner wall of the through hole 901c.

[0151] At this time, the crush plate 901a is arranged in the through hole 901c on the base plate 901, and one end of the crush plate 901a is connected to the base plate 901 through the connecting portion 901b, and the other end forms a crush deformation zone k, which helps to simplify the structure of the nut plate 9 and can limit the movement distance of the crush plate 901a with the welding nut 902, thereby ensuring the use effect of the nut plate 9 when it collapses.

[0152] In this embodiment, during specific implementation, the connection portion 901b may be, for example, a curved connection plate. In a natural state, the connection plate is curved, and the crush plate 901a is arranged in the bottom plate 901. When the vehicle is hit from the side, the side of the battery pack is subjected to force, and the collision force is transmitted to the crush plate 901a via the bolts connected to the welding nut 902. Then, the crush plate 901a pulls the connection portion 901b, so that the curved connection portion 901b is deformed, and at the same time, the crush plate 901a compresses the above-mentioned crush deformation zone k, thereby realizing the crushing function of the battery pack installation point a.

[0153] It is understandable that in this embodiment, the connection part 901b adopts a curved connection plate, which not only has the advantages of simple structure and easy preparation and molding, but also has a good crushing deformation effect. Moreover, in specific implementation, of course, in addition to using a curved connection plate at one end of the crush plate 901a, the connection part 901b can also be set at other positions, for example, the connection part 901b consisting of a curved connection plate is respectively set at the front and rear sides of the crush plate 901a, which is also possible.

[0154] The vehicle body reinforcement structure of this embodiment makes the reinforcement sealing plate 15 provided in the rear floor frame 100 connected to the rear end of the upper longitudinal beam 10 of the front floor, and the front end of the upper longitudinal beam 10 of the front floor is connected to the lower cross beam 14 of the front wall through the longitudinal beam 11 of the front wall. At the same time, the rear floor frame 100, the lower cross beam 14 of the front wall, and the upper longitudinal beam 10 of the front floor and the longitudinal beam 11 of the front wall on both sides are connected to form a first annular reinforcement structure. At the same time, by providing a "C"-shaped lower cross beam 6 of the rear floor, the torsion boxes 7 on both sides are connected through the rear cross beam 8 of the cabin, and the lower cross beam 6 of the rear floor, the rear cross beam 8 of the cabin, and the door sill beams 2 on both sides and the torsion box 7 are connected to form a second annular reinforcement structure.

[0155] Therefore, this embodiment can not only utilize the high strength of each annular structure to increase the structural strength and torsional stiffness of the vehicle body, but also can utilize the annular force transmission channel formed by the annular structure to facilitate the transmission and dispersion of the collision force in the vehicle body, thereby helping to improve the safety of the entire vehicle.

[0156] In the event of a car collision, Fig.16 As shown, taking a head-on collision as an example, the head-on collision force is transmitted rearward through the front anti-collision beam and the front cabin longitudinal beam 4, and can be transmitted rearward through the front wall longitudinal beam 11 and the front floor upper longitudinal beam 10. In addition, the collision force transmitted to the rear floor longitudinal beam 101 can also be transmitted through a dual channel at the rear floor longitudinal beam 101 based on the upper and lower double cavity structures in the rear floor longitudinal beam 101, so as to improve the transmission effect of the collision force.

[0157] On the other hand, Fig. 27 As shown, still taking the head-on collision as an example, the collision force is transmitted backwards from the front cabin longitudinal beam 4. At the rear end of the front cabin, the collision force can be transmitted laterally (in the left-right direction of the whole vehicle) through the rear section cross beam 8 of the cabin. In the middle of the vehicle body, the collision force can be transmitted backwards along the sill beams 2 on both sides, and can also be transmitted laterally using the front seat installation cross beam 5. At the rear of the vehicle body, the collision force from the sill beam 2 can not only be transmitted longitudinally (in the front-back direction of the whole vehicle) and laterally at the rear floor frame 100, but can also be transmitted using the rear floor lower cross beam 6, which can achieve a good transmission and dispersion effect to improve collision safety.

[0158] Embodiment 2

[0159] This embodiment relates to a vehicle, in which the vehicle body reinforcement structure described in Embodiment 1 is provided. The vehicle of this embodiment can increase the structural strength and torsional rigidity of the vehicle body by providing the vehicle body reinforcement structure described in Embodiment 1, and can also facilitate the transmission and dispersion of the collision force in the vehicle body, thereby improving the safety of the entire vehicle and having good practicality.

[0160] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle body reinforcement structure, characterized in that: The invention comprises a rear floor frame (100) in a rear floor assembly (1), upper longitudinal beams (10) of the front floor arranged on the left and right sides, and a lower cross beam (14) of the front enclosure, and also comprises a lower cross beam (6) of the rear floor connected to the bottom of the rear floor frame (100), a door sill beam (2) arranged on the left and right sides, and a torsion box (7) respectively connected to the rear ends of the left and right front cabin longitudinal beams (4); The rear ends of the upper longitudinal beams (10) on the front floor at both sides are connected to the rear floor frame (100), and the front ends of the upper longitudinal beams (10) on the front floor at both sides are connected to the lower cross beam (14) of the front enclosure via the longitudinal beams (11) of the front enclosure, and the rear floor frame (100), the lower cross beam (14) of the front enclosure, and the upper longitudinal beams (10) on the front floor and the longitudinal beams (11) of the front enclosure at both sides are connected to form a first annular reinforcement structure; The left and right sides of the lower cross beam (6) of the rear floor are respectively connected to the rear ends of the threshold beams (2) on the corresponding sides, the torsion boxes (7) on each side are connected to the front ends of the threshold beams (2) on the same side, and a rear section cross beam (8) of the cabin is connected between the torsion boxes (7) on both sides. The lower cross beam (6) of the rear floor, the rear section cross beam (8) of the cabin, and the threshold beams (2) and the torsion boxes (7) on both sides are connected to form a second annular reinforcement structure.

2. The vehicle body reinforcement structure according to claim 1, characterized in that: The rear floor frame (100) has rear floor longitudinal beams (101) arranged on the left and right sides, and a reinforcing sealing plate (15) is arranged inside the rear floor longitudinal beam (101) on each side. The reinforcing sealing plates (15) on both sides extend along the front-rear direction of the vehicle, and the front end of each reinforcing sealing plate (15) extends out from the front end of the rear floor longitudinal beam (101) on the same side. The rear end of the upper longitudinal beam (10) of the front floor on each side is connected to the rear floor frame (100) via the reinforcing sealing plate (15) on the same side.

3. The vehicle body reinforcement structure according to claim 2, characterized in that: Each of the reinforcing sealing plates (15) is separated into an upper cavity (M) and a lower cavity (N) located above and below the reinforcing sealing plates (15) respectively in the rear floor longitudinal beam (101) on the same side; The rear end of each of the reinforcing sealing plates (15) is arranged correspondingly to the front mounting portion of the rear sub-frame in the rear floor longitudinal beam (101) on the same side.

4. The vehicle body reinforcement structure according to claim 3, characterized in that: The top of the rear floor longitudinal beam (101) is covered with a longitudinal beam cover plate (200a); The lower cavity (N) is formed between the rear floor longitudinal beam (101) and the reinforced sealing plate (15), and the upper cavity (M) is formed between the rear floor longitudinal beam (101), the reinforced sealing plate (15) and the longitudinal beam cover plate.

5. The vehicle body reinforcement structure according to claim 4, characterized in that: The front mounting portion of the rear subframe includes a screw connection member (16) disposed in the lower cavity (N) of the longitudinal beam; The screw connection member (16) is integrally formed, and the screw connection member (16) comprises a support plate (1602) connected to the rear floor longitudinal beam (101), and a screw sleeve (1602) with one end connected to the support plate (1602); The screw sleeve (1602) is provided with a threaded connection hole (1603), the threaded connection hole (1603) is arranged through the support plate (1602), and the bottom of the rear floor longitudinal beam (101) is provided with a connection through hole arranged corresponding to the threaded connection hole (1603).

6. The vehicle body reinforcement structure according to claim 5, characterized in that: One end of the screw sleeve (1602) away from the bottom plate passes through the reinforcing sealing plate (15) and extends into the upper cavity (M) of the longitudinal beam; The distance between the end of the screw sleeve (1602) extending into the upper cavity (M) of the longitudinal beam and the reinforcing sealing plate (15) is within 10 mm, and the screw sleeve (1602) is connected to the reinforcing sealing plate (15).

7. The vehicle body reinforcement structure according to claim 5, characterized in that: The portion of the reinforcing sealing plate (15) where the screw sleeve (1602) extends into the upper cavity (M) of the longitudinal beam is provided with reinforcing ribs; The reinforcing rib comprises an annular reinforcing rib body (1501) and a plurality of linear reinforcing rib bodies (1502) connected to the annular reinforcing rib body (1501); The annular reinforcing rib body (1501) is arranged around the screw sleeve (1602), and the plurality of linear reinforcing rib bodies (1502) are arranged radially with the annular reinforcing rib body (1501) as the center.

8. The vehicle body reinforcement structure according to claim 5, characterized in that: The front mounting portion of the rear subframe further comprises a side reinforcing plate (17) located in the lower cavity (N) of the longitudinal beam, the side reinforcing plate (17) being connected to the rear floor longitudinal beam (101), and the side reinforcing plate (17) being arranged side by side on one side of the screw sleeve (1602), the screw sleeve (1602) being connected to the side reinforcing plate (17); and / or, The support plate (1602) is spot welded to the rear floor longitudinal beam (101), and the screw connection member (16) is integrally stamped.

9. The vehicle body reinforcement structure according to any one of claims 1 to 8, characterized in that: The rear floor frame (100) further comprises a rear floor middle cross beam (102) connected between the rear floor longitudinal beams (101) on both sides, and the rear floor lower cross beam (6) is in a "C" shape with an opening facing forward; The rear floor longitudinal beam (101) on each side is connected to the rear end of the door sill beam (2) on the same side, and the rear floor lower cross beam (6) is connected between the front section (101a) of the rear floor longitudinal beam (101) on both sides and the rear floor middle cross beam (102).

10. The vehicle body reinforcement structure according to claim 9, characterized in that: The rear floor frame (100) further comprises a rear floor front cross beam (103) and a rear floor rear cross beam (104) connected between the rear floor longitudinal beams (101) on both sides; The front cross member (103) of the rear floor is connected between the front sections (101a) of the rear floor longitudinal beams (101) on both sides, the rear cross member (104) of the rear floor is connected between the rear sections (101b) of the rear floor longitudinal beams (101) on both sides, and the middle cross member (102) of the rear floor is connected to the transition area between the front section (101a) and the rear section (101b) of the rear floor longitudinal beam (101) on each side; A circular structure is formed by connecting the front cross member (103) of the rear floor, the middle cross member (102) of the rear floor and the rear floor longitudinal beams (101) on both sides, and a circular structure is formed by connecting the rear cross member (104) of the rear floor, the middle cross member (102) of the rear floor and the rear floor longitudinal beams (101) on both sides.

11. The vehicle body strengthening structure according to claim 9, wherein: Rear sill beams (2a) are provided at the rear ends of the sill beams (2) on both sides, and each rear sill beam (2a) is connected to the rear floor longitudinal beam (101) on the same side; A longitudinal beam front cavity (G) is formed by enclosing between the front section (101a), the rear sill beam (2a) and the rear floor panel (200) on each side, and a lower cross beam side cavity (H) is formed by enclosing between the front section (101a), the rear sill beam (2a) and the lower cross beam (6) of the rear floor on each side; A middle cross beam cavity (E) is formed by enclosing between the middle cross member (102) of the rear floor and the rear floor panel (200), and a lower cross beam middle cavity (F) is formed by enclosing between the lower cross beam (6) of the rear floor and the middle cross member (102) of the rear floor; The longitudinal beam front cavity (G) and the lower cross beam side cavity (H) are stacked in the up-down direction of the whole vehicle, and the middle cross beam cavity (E) and the lower cross beam middle cavity (F) are stacked in the up-down direction of the whole vehicle.

12. The vehicle body strengthening structure according to claim 1, wherein: It further includes a front row seat mounting cross beam (5) connected between the sill beams (2) on both sides, and a middle channel (18) extending in the front-rear direction of the whole vehicle; The front row seat mounting cross beam (5) penetrates from one side sill beam (2) to the other side sill beam (2), the front end of the middle channel (18) is connected to the front lower cross beam (14), and the rear end of the middle channel (18) is connected to the front row seat mounting cross beam (5).

13. The vehicle body strengthening structure according to claim 12, wherein: The front row seat mounting cross beam (5) includes a cross beam body (5a), and connecting beams (5b) connected to the left and right ends of the cross beam body (5a), the cross beam body (5a) is formed by a roll forming process, and the cross beam body (5a) has a plurality of cross beam main bodies (5c) connected in sequence in the front-rear direction of the whole vehicle, and the cross section of each cross beam main body (5c) is in a "U" shape; and / or, The middle channel (18) has a plurality of middle channel main bodies (18a) connected in sequence in the left-right direction of the whole vehicle, and the cross section of each middle channel main body (18a) is in a "U" shape.

14. The vehicle body reinforcement structure according to claim 1, characterized in that: The sill beams (2) on both sides are provided with mounting holes (2b) for mounting a battery pack, and nut plates (9) arranged corresponding to the mounting holes (2b); The mounting through hole (2b) is a long hole extending in the left-right direction of the vehicle, the nut plate (9) comprises a bottom plate (901) and a welding nut (902) arranged on the bottom plate (901), and the battery pack is connected to the welding nut (902) by means of a connecting bolt passing through the mounting through hole (2b); The bottom plate (901) is connected to a crush plate (901a) via a deformable connecting portion (901b), the welding nut (902) is connected to the crush plate (901a), and when the connecting portion (901b) is deformed, the welding nut (902) can move relative to the bottom plate (901) along the length direction of the mounting through hole (2b).

15. The vehicle body reinforcement structure according to claim 14, characterized in that: The bottom plate (901) is provided with a through hole (901c), the crush plate (901a) is located in the through hole (901c), and the crush plate (901a) is located at two ends of the mounting hole (2b) in the length direction, one end of which is connected to the bottom plate (901) through the connecting portion (901b), and a deformation space (k) is formed between the other end and the inner wall of the through hole (901c); and / or, The connecting portion (901b) is a curved connecting plate.

16. A vehicle, characterized in that: The vehicle is provided with the vehicle body reinforcement structure according to any one of claims 1 to 15.

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