Body structure and vehicle equipped with same

Abstract

A vehicle body structure and a vehicle are provided. The vehicle body structure (100) includes a front cross-member upper plate (17), a dash panel, and a front cross-member lower plate (13), at least a portion of the dash panel is provided rearward of the front cross-member upper plate, at least a portion of the front cross-member lower plate is provided below the front cross-member upper plate and the dash panel, the front cross-member lower plate, the front cross-member upper plate, and the dash panel are engaged to define a first cavity (B), and the portions of the front cross-member lower plate, the front cross-member upper plate, and the dash panel that form the first cavity are engaged to form a front cross-member.

Description

[Technical Field]

[0001] This disclosure claims priority to a Chinese patent application bearing application number 202111675535.5 and entitled "Vehicle body structure and vehicle equipped therewith," filed with the State Intellectual Property Office of the People's Republic of China on December 31, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to a vehicle body structure and a vehicle including the same. [Background technology]

[0003] In the development of new energy vehicles, collision safety is of particular importance. A frontal collision is one of the important criteria for evaluating the rationality of a vehicle's front compartment structure. To protect the safety of passengers in a frontal collision, the energy of the frontal collision is absorbed by the deformation of the front structure before reaching the front end of the dash panel. However, the remaining energy is still too large and is directly transferred to the dash panel, causing the dash panel to deform and enter the passenger compartment, endangering the safety of the passengers. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a new technical means for vehicle body structure that can solve at least one technical problem in the background art. [Means for solving the problem]

[0005] The new technical means of the vehicle according to the present disclosure includes the above-mentioned body structure.

[0006] The vehicle body structure of the present disclosure includes a front cross member upper plate, a dash panel, and a front cross member lower plate, wherein at least a portion of the dash panel is located rearward of the front cross member upper plate, and at least a portion of the front cross member lower plate is located below the front cross member upper plate and the dash panel, and the front cross member lower plate, the front cross member upper plate, and the dash panel are engaged to define a first cavity, and the portions of the front cross member lower plate, the front cross member upper plate, and the dash panel that constitute the first cavity are engaged to form a front cross member.

[0007] Preferably, the vehicle body structure further includes a center tunnel extending along the fore-and-aft direction of the vehicle body, the center tunnel being connected to the dash panel, and the connection position between the center tunnel and the dash panel being located opposite the first cavity.

[0008] Preferably, the connection position between the center tunnel and the dash panel corresponds to a middle position of the first cavity in the up-down direction of the vehicle body.

[0009] Preferably, the vehicle body structure further includes a front side member, the front side member including a left front side member and a right front side member spaced apart along the left-right direction of the vehicle body, the first cavity having ends connected to the left front side member and the right front side member at positions close to the left front side member and close to the right front side member, respectively, the positions of the two ends in the fore-and-aft direction being forward of the center of the first cavity, and the center of the first cavity being the center of the first cavity in the left-and-right direction of the vehicle body.

[0010] Preferably, the end includes a left end and a right end spaced apart along the left-right direction of the vehicle body, the left end being connected to the left front side member, and the right end being connected to the right front side member.

[0011] Preferably, the two ends are provided opposite to each other, and the two ends and the center of the first cavity form a V-shaped structure.

[0012] Preferably, the first cavity has a cross-sectional area at a central portion smaller than that at the end portions, and the cross-sectional area is the cross-sectional area of ​​the first cavity along the up-down direction of the vehicle body.

[0013] Preferably, the cross-sectional area of ​​the central portion of the first cavity is 0.5 to 0.8 times the cross-sectional area of ​​the end portion.

[0014] Preferably, the cross-sectional area of ​​the first cavity gradually increases along a direction from the center of the first cavity toward the two ends.

[0015] Preferably, the vehicle body structure further includes a support plate, the support plate being provided in a central portion of the first cavity to reinforce the structure of the front cross member.

[0016] Preferably, the front cross member lower plate and the dash panel are engaged to define a second cavity.

[0017] Preferably, at least a portion of the lower surface of the front cross member lower plate is parallel to the bottom surface of the vehicle body.

[0018] Preferably, the vehicle body structure further includes a mounting portion provided on a lower side of the front cross member lower plate and positioned between the left front side member and the right front side member, for mounting a front subframe.

[0019] Preferably, the vehicle body structure further includes a left reinforcing plate and a right reinforcing plate, the left reinforcing plate and the right reinforcing plate being located at positions corresponding to the left front side member and the right front side member of the front cross member lower plate, respectively, and the left reinforcing plate and the right reinforcing plate being engaged with the front cross member lower plate to form a third cavity.

[0020] Preferably, the front side member is ,centre The front side member rear section includes a side member connecting plate and a side member seal plate connecting plate, the side member connecting plate and the side member seal plate connecting plate are engaged to form a fourth cavity and a fifth cavity, the fourth cavity extending from the front side member toward the front end position of the side sill, and the fifth cavity extending from the front side member toward the vertical center position of the A-pillar of the vehicle body.

[0021] Preferably, the front side member rear section includes a left front side member rear section and a right front side member rear section, the left front side member rear section being connected to the left end section, and the right front side member rear section being connected to the right end section.

[0022] A vehicle according to the present disclosure includes the vehicle body structure described in any of the above embodiments.

[0023] In one embodiment of the present disclosure, a first cavity is formed by engaging the front cross member lower plate, the front cross member upper plate, and the dash panel, and the first cavity has a force transmission function. When a collision force is applied to the front of the vehicle body, the front collision force is transmitted to the rear structure via the first cavity, preventing excessive energy from being directly transmitted to the dash panel, causing the dash panel to deform and intrude into the passenger compartment, thereby endangering the safety of the passengers.

[0024] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure, taken in conjunction with the drawings.

[0025] The drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the disclosure. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 2 is a bottom view of a vehicle body structure according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view taken along the EE direction in FIG. [Figure 3] FIG. 1 is a partially enlarged cross-sectional view taken along the EE direction at a position close to the dash panel. [Figure 4] FIG. 1 is a bottom perspective view of a vehicle body structure according to an embodiment of the present disclosure. [Figure 5] FIG. 2 is a cross-sectional view taken along the FF direction in FIG. [Figure 6] FIG. 2 is a bottom view of a partial structure of a vehicle body structure according to an embodiment of the present disclosure. [Figure 7] FIG. 7 is an exploded view of the vehicle body structure in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0027] Various exemplary embodiments of the present disclosure will be described in detail below with reference to the drawings. Unless otherwise specified, the relative arrangement of components and steps, numerical expressions and values ​​described in these embodiments do not limit the scope of the present disclosure.

[0028] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the disclosure and its application or uses.

[0029] Techniques, methods and devices known to those skilled in the art are not discussed in detail, but where appropriate, said techniques, methods and devices should be considered part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be construed as illustrative only and not limiting, and therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that similar symbols and letters represent similar things in the following drawings, so that once something is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] Hereinafter, a vehicle body structure 100 according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0033] As shown in FIGS. 1 to 7, a vehicle body structure 100 according to an embodiment of the present disclosure includes a front cross member upper plate 17, a dash panel, and a front cross member lower plate 13.

[0034] Specifically, at least a portion of the dash panel is provided behind the front cross member upper plate 17, and at least a portion of the front cross member lower plate 13 is provided below the front cross member upper plate 17 and the dash panel.

[0035] The front cross member lower plate 13, the front cross member upper plate 17, and the dash panel are engaged to define a first cavity B, and the portions of the front cross member lower plate 13, the front cross member upper plate 17, and the dash panel that constitute the first cavity B are engaged to form the front cross member.

[0036] In other words, the vehicle body structure 100 according to the embodiment of the present disclosure includes a front cross member upper plate 17, a dash panel, and a front cross member lower plate 13. If the longitudinal direction of the vehicle body is taken as the reference direction, with the front of the vehicle defined as the front and the tail defined as the rear, then at least a portion of the dash panel may be located behind the front cross member upper plate 17. If the vertical direction of the vehicle body is taken as the reference direction, with the roof defined as the top and the bottom of the vehicle defined as the bottom, then at least a portion of the front cross member lower plate 13 may be located below the front cross member upper plate 17 and the dash panel. For ease of explanation, the left-right direction of the vehicle body is defined as the Y-axis direction, the up-down direction as the Z-axis direction, and the front-rear direction as the X-axis direction. That is, at least a portion of the dash panel may be located behind the front cross member upper plate 17 in the X-axis direction. At least a portion of the front cross member lower plate 13 may simultaneously be located below the front cross member upper plate 17 in the Z-axis direction and below the dash panel in the Z-axis direction.

[0037] The front cross member lower plate 13, the front cross member upper plate 17, and the dash panel are engaged to define a first cavity B, which can be the front cross member 6 of the virtual dash panel. Note that the first cavity B transmits a collision force received by the front of the vehicle body to the rear of the vehicle body substantially along the X direction, for example, to the rear center tunnel 16 and a rear structure. In other words, the first cavity B can function as a force transmission structure to transmit the collision force.

[0038] In this embodiment, the first cavity B is formed by engaging the front cross-member lower plate 13, the front cross-member upper plate 17, and the dash panel, and the first cavity B has a force transmission function. When a collision force is applied to the front of the vehicle body, the front collision force is transmitted to the rear structure via the first cavity B, preventing excessive energy from being directly transmitted to the dash panel, causing the dash panel to deform and intrude into the passenger compartment, thereby endangering the safety of the passengers.

[0039] In one embodiment of the present disclosure, as shown in FIGS. 1 and 3 , the vehicle body structure 100 further includes a center tunnel 16 extending in the longitudinal direction of the vehicle body. The center tunnel 16 is connected to a dash panel, and the connection position between the center tunnel 16 and the dash panel is located opposite the first cavity B. For example, the center tunnel 16 is connected to the dash panel via a center tunnel upper elevation 16b. Specifically, the center portion of the floor panel may protrude upward to form the center tunnel 16 extending in the longitudinal direction. The floor panel has a center tunnel upper elevation 16b corresponding to the center tunnel 16, which may be connected to the dash panel, and the connection position between the center tunnel upper elevation 16b and the dash panel may be located opposite the first cavity B. For example, if the dash panel includes an upper dash panel section and a lower dash panel section 14, the center tunnel upper elevation 16b is connected to the lower dash panel section 14 in an overlapping manner. In this embodiment, the overlap connection position between the center tunnel upper vertical surface 16b and the dash panel is close to the first cavity B, which is more advantageous for transmitting the collision force rearward to the center tunnel 16 and the rear structure via the first cavity B.

[0040] In some specific embodiments of the present disclosure, the connection position between the center tunnel upper elevation surface 16b and the dash panel corresponds to the central position in the up-down direction of the vehicle body of the first cavity B. That is, the connection position is close to the central position in the Z-axis direction of the first cavity B, and for example, the center tunnel upper elevation surface 16b is lap-connected to the dash panel lower section 14, and the lap-connected edge is provided at the central position in the Z-axis direction of the first cavity B.

[0041] In this embodiment, by limiting the connection position between the center tunnel upper vertical surface 16b and the dash panel to near the middle position in the vertical direction of the first cavity B, not only can the collision force be transmitted to the center tunnel 16 and the rear structure via the first cavity B, but imbalance when transmitting the collision force to the rear can also be avoided.

[0042] In one embodiment of the present disclosure, as shown in FIG. 4 , the vehicle body structure 100 further includes a left front side member 1 and a right front side member 1′ spaced apart along the left-right direction of the vehicle body, and the first cavity B has ends connected to the left front side member 1 and the right front side member 1′ at positions adjacent to the left front side member 1 and the right front side member 1′, respectively, and the positions of the two ends in the fore-and-aft direction are forward of the center of the first cavity B, which is the center of the first cavity B in the left-and-right direction of the vehicle body.

[0043] That is, the vehicle body structure 100 of this embodiment may further include front side members, which may be connected to the front cross-member lower plate 13. For example, the front side members may be located in front of the front cross-member lower plate 13, with the rear portions of the front side members overlapping and connected to the front cross-member lower plate 13. The front side members may be divided into a left front side member 1 and a right front side member 1' along the left-right direction. The left front side member 1 and the right front side member 1' may be spaced apart along the left-right direction. The front cross-member lower plate 13 may be located between the left front side member 1 and the right front side member 1', with the rear portion of the left front side member 1 at the connection position between the left front side member 1 and the dash panel, and the rear portion of the right front side member 1' at the connection position between the right front side member 1' and the dash panel. Engaging the front cross-member lower plate 13 with the front side members provides stability for the connected structure and facilitates the transmission of a collision force received by the front side members to the first cavity B.

[0044] The first cavity B may be provided between the left front side member 1 and the right front side member 1', and when the left front side member 1 and the right front side member 1' transmit a collision force rearward, the collision force can be transmitted to the center tunnel 16 and the rear structure via the first cavity B.

[0045] In one embodiment of the present disclosure, the ends include a left end and a right end spaced apart along the left-right direction of the vehicle body, with the left end connected to the left front side member 1 and the right end connected to the right front side member 1'. That is, the first cavity B has a left end, a central portion, and a right end in that order along the left-right direction, with the left end adjacent to the left front side member 1 and the right end adjacent to the right front side member 1'. The central portion here may refer to the central portion along the left-right direction of the vehicle, i.e., the position of the central portion along the Y-axis direction of the vehicle. For ease of explanation, the first cavity B may be divided into a left end cavity 6a, a central cavity 6b, and a right end cavity along the Y-axis direction, the left end cavity 6a may be located to the left of the central cavity 6b, the right end cavity may be located to the right of the central cavity 6b, and the central cavity 6b may be connected to the left end cavity 6a and the right end cavity, respectively.

[0046] In some specific embodiments of the present disclosure, as shown in FIG. 4 , the two ends are disposed opposite each other, and the two ends and the center of the first cavity B form a V-shaped structure. That is, the front cross member gradually slopes from both sides toward the center along the direction from the connection position between the front cross member upper plate 17 and the front side member toward the center in the left-right direction, forming a V-shaped structure, which can achieve a better force transmission effect. When the center of the first cavity B is located in correspondence with the position of the center tunnel 16 in the front-rear direction, at least a portion of the collision force received by the front side member can be transmitted to the center tunnel 16 via the first cavity B.

[0047] In some specific embodiments of the present disclosure, the cross-sectional area of ​​the first cavity B is smaller at the center than at the end portions, and the cross-sectional area is the cross-sectional area of ​​the first cavity B along the vertical direction of the vehicle body. That is, the cross-sectional area of ​​the first cavity B is larger at the portion closer to the front side member, and smaller at the portion closer to the center position in the left-right direction of the first cavity B. That is, the central cavity 6b is smaller, and the left end cavity 6a and the right end cavity are larger.

[0048] When the left front side member 1 transmits a frontal collision force, the connection position or base portion between the rear part of the left front side member 1 and the dash panel transmits the force to the left end cavity 6a, and from the left end cavity 6a to the central cavity 6b, thereby acting as a guide against the collision force. Similarly, the right front side member 1' can also transmit the force to the central cavity 6b via the right end cavity, thereby acting as a guide against the collision force, and a description thereof will be omitted here.

[0049] In this embodiment, by limiting the cross-sectional area of ​​the central part of the first cavity B to be smaller than the cross-sectional area of ​​the end part, it is possible to realize a change in the cross-sectional area, and further, it is possible to smoothly guide the collision force transmitted in a frontal collision and prevent a sudden change point from occurring behind the front side member.

[0050] In one embodiment of the present disclosure, the cross-sectional area of ​​the center portion of the first cavity B is 0.5 to 0.8 times the cross-sectional area of ​​the end portion, and may include the end values. For example, the cross-sectional area of ​​the center portion is 0.50, 0.55, 0.56, 0.6, 0.7, 0.8, etc., times the cross-sectional area of ​​the end portion. If the cross-sectional area of ​​the center portion is less than 0.5 times the cross-sectional area of ​​the end portion, the impact force is less likely to be transmitted to the center tunnel 16 or the rear structure, and this point becomes a weak point in the structure. If the cross-sectional area of ​​the center portion of the first cavity B is more than 0.8 times the cross-sectional area of ​​the end portion, the difference between the cross-sectional area of ​​the center portion and the cross-sectional area of ​​the end portion becomes smaller, making it more likely that a sudden change will occur in the rear of the front side member.

[0051] In some specific embodiments of the present disclosure, the cross-sectional area of ​​the first cavity B gradually increases along the direction from the center toward the two ends of the first cavity B. That is, the cross-sectional area of ​​the first cavity B gradually increases along the direction from the center toward the ends, with the cavity at the center of the first cavity B in the Y-axis direction of the vehicle body being small, and the first cavity B gradually increasing from the center position in the Y-axis direction toward the positions of the left front side member 1 and the right front side member 1′ on both sides in the Y-axis direction, which can further improve smoothness when guiding a collision force.

[0052] In one embodiment of the present disclosure, the vehicle body structure 100 further includes a support plate, which is disposed in the center of the first cavity B to reinforce the structure of the front cross member. That is, the support plate is disposed in the first cavity B, and the support plate can perform a supporting function, which is advantageous for ensuring the structural integrity of the first cavity B. When the support plate is located in the center of the first cavity B, it can be defined as a center support plate 22. That is, when the cross-sectional area of ​​the center of the first cavity B is small, providing the support plate can ensure the rigidity of the first cavity B at that location.

[0053] In one embodiment of the present disclosure, the front cross member lower plate 13 is welded to the front cross member upper plate 17 and the dash panel, respectively, i.e., the first cavity B may be formed by welding the front cross member lower plate 13, the front cross member upper plate 17 and the dash panel together.

[0054] In one embodiment of the present disclosure, the shape of the front cross member upper plate 17 may be approximately L-shaped, one side of the front cross member upper plate 17 may be joined to the front cross member lower plate 13, and the other side of the front cross member upper plate 17 may be joined to the dash panel. The shape of the front cross member lower plate 13 may be approximately L-shaped, and the front cross member upper plate 17 and the front cross member lower plate 13 may be joined at central positions along the Z-axis direction of the left front side member 1 and the right front side member 1′.

[0055] Preferably, the front cross-member lower plate 13 has a front cross-member lower plate upper upright surface 13b and a front cross-member lower plate central surface 13c, which are connected to each other along the longitudinal direction. The front cross-member upper plate 17 has a front cross-member upper plate lower upright surface 17a and a front cross-member upper plate upper upright surface 17b. The dash panel has a dash-panel lower section 14 and a dash-panel upper section 18. The dash-panel lower section 14 has a dash-panel lower section upper upright surface 14b and a dash-panel lower section central surface 14c. The first cavity B may be formed by welding the front cross-member lower plate 13, the front cross-member upper plate 17, and the dash-panel lower section 14 together. In this embodiment, the use of a lap connection method simplifies the installation process.

[0056] The upper upright surface 13b of the front cross-member lower plate is located in front of the central surface 13c of the front cross-member lower plate, the upper upright surface 14b of the dash panel lower tier is located in front of the central surface 14c of the dash panel lower tier, the lower upright surface 17a of the front cross-member upper plate may be lap-connected to the upper notch of the dash panel lower tier 14, the upper upright surface 17b of the front cross-member upper plate may be lap-connected to the upper upright surface 13b of the front cross-member lower plate, and the central surface 13c of the front cross-member lower plate may be lap-connected to the central surface 14c of the dash panel lower tier, thereby forming a first cavity B.

[0057] In one embodiment of the present disclosure, as shown in Figure 3, the front cross member lower plate 13 and the dash panel are engaged to define a second cavity A. The second cavity A may be located above the dash panel and in front of the floor. Specifically, the front cross member lower plate 13 may extend toward the rear of the vehicle body to the front of the front floor, forming a second cavity A structure together with the lower part of the dash panel at the front position of the front floor. The second cavity A structure may be located in front of the battery pack under the floor of the vehicle body and provide a front mounting point for the battery pack. The second cavity A may correspond to the front cross member for mounting a battery pack in a conventional automobile.

[0058] The front cross-member lower plate 13 may extend toward the position of the rear sealing plate assembly 15. The sealing plate assembly 15 of the present disclosure may include a battery pack sealing plate, which may be installed in the position of the front floor of a conventional automobile. The front cross-member lower plate 13 further has a front cross-member lower plate lower bottom surface 13a, which is located rearward of the front cross-member lower plate central surface 13c. The dash panel further has a dash panel lower bottom surface 14a, which is lap-connected to the front cross-member lower plate lower bottom surface 13a, and the front cross-member lower plate central surface 13c is lap-connected to the dash panel lower central surface 14c. Furthermore, a second cavity A is formed below the dash panel (forward of the floor), and the second cavity A may correspond to a front cross-member for mounting a battery pack in a conventional automobile. The cross section of the second cavity A along the vehicle width direction may be approximately triangular.

[0059] In addition, the second cavity A is located in front of the battery pack under the vehicle floor and can provide a front mounting point for the battery pack, i.e., the second cavity A has the function of a front cross member for mounting the battery pack.

[0060] In one embodiment of the present disclosure, at least a portion of the lower surface of the front cross member lower plate 13 is parallel to the bottom surface of the vehicle body, which is advantageous for transmitting frontal collision forces to rear structures, such as the center tunnel 16.

[0061] In some specific embodiments of the present disclosure, vehicle body structure 100 further includes a mounting portion that is provided below front cross-member lower plate 13 and is located between left front side member 1 and right front side member 1′ for mounting a front subframe. That is, a mounting portion is provided below front cross-member upper plate 17 and between left front side member 1 and right front side member 1′, thereby enabling mounting of a front subframe.

[0062] In one embodiment of the present disclosure, as shown in FIG. 4 , the mounting portions include left front subframe mounting points 19 and right front subframe mounting points 19′, and, for example, integrated left front subframe mounting points 19 and right front subframe mounting points 19′ are designed below the front cross-member lower plate 13 between the left front side member 1 and the right front side member 1′.

[0063] In some specific embodiments of the present disclosure, the number of support plates may be multiple, and multiple support plate structures may be provided inside first cavity B to ensure the structural integrity of first cavity B. The left front subframe mounting point 19 is provided with a left inner support plate 21 at a corresponding position on the inside and a left outer support plate 20 at a corresponding position on the outside, and the corresponding right front subframe mounting point 19' is provided with two support plates, a right inner support plate 21' and a right outer support plate 20', at corresponding positions. When the front subframe is subjected to a collision load, such as a front or side collision, of the vehicle, the collision force can be resolved and transmitted by the support plates below the mounting points.

[0064] In one embodiment of the present disclosure, the vehicle body structure 100 further includes a left reinforcing plate and a right reinforcing plate, which are located at positions corresponding to the left front side member 1 and the right front side member 1' of the front cross member lower plate 13, respectively, and the left reinforcing plate and the right reinforcing plate are engaged with the front cross member lower plate 13, respectively, to form a third cavity C.

[0065] In other words, the vehicle body structure 100 further includes a left reinforcing plate and a right reinforcing plate, which may be located at ends of the first cavity B and are spaced apart in the left-right direction. As shown in FIG. 4 , the left reinforcing plate is defined as the left reinforcing plate 23 in the lower section of the dash panel and is adjacent to the left front side member 1, and the right reinforcing plate is defined as the right reinforcing plate 23' in the lower section of the dash panel and is adjacent to the right front side member 1'. The left reinforcing plate and the right reinforcing plate are each engaged with the front cross member upper plate 17 to form the third cavity C. That is, the left reinforcing plate and the front cross member upper plate 17 are engaged to form the third cavity C, and the right reinforcing plate and the front cross member upper plate 17 are also engaged to form the third cavity C.

[0066] That is, the front cross-member lower plate 13 provided behind the left front side member 1 may correspond to the outer connecting plate of the rear stage of a side member of a conventional automobile, and the front cross-member lower plate 13, front cross-member upper plate 17, and dash panel lower stage 14 at this position may form the force transmission structure of the first cavity B. In addition, a dash panel lower stage left reinforcing plate 23 and a dash panel lower stage right reinforcing plate 23' may be further provided inside the first cavity B, and the left reinforcing plate, the right reinforcing plate, and the front cross-member lower plate 13 may be engaged to form a third cavity C.

[0067] In this embodiment, the front cross-member lower plate 13 may correspond to the rear of the front side member of a conventional automobile. In this disclosure, the left and right reinforcing plates are provided at the rear positions of the original front side members to enhance the force transmission function of the first cavity B. That is, the front cross-member lower plate 13 in this embodiment can complete the transmission of the front collision force from the front side member to the side sill via the first cavity B.

[0068] In one embodiment of the present disclosure, the front side member includes a front side member rear section, which is connected to the side sill member, and which includes a side member connecting plate and a side member seal plate connecting plate, and the side member connecting plate and the side member seal plate connecting plate are engaged to form a fourth cavity D and a fifth cavity E, and the fourth cavity D extends from the front side member toward the front end position of the side sill, and the fifth cavity E extends from the front side member toward the central position of the A-pillar of the vehicle body in the vertical direction of the vehicle body.

[0069] The side member seal plates may include a left front side member seal plate 2 and a right front side member seal plate 2' distributed at an interval along the left-right direction, with the left front side member seal plate 2 being provided on the side of the left front side member 1 adjacent to the left side sill 9, and the right front side member seal plate 2' being provided on the side of the right front side member 1' adjacent to the right side sill 9'. The side member connection plates may be divided into a left front side member connection plate 12 and a right front side member connection plate 12'. The left front side member connection plate 12 may be located rearward of the left front side member seal plate 2, and the right front side member connection plate 12' may be located rearward of the right front side member seal plate 2'. The side member seal plate connection plates may be divided into a left front side member seal plate connection plate 11 and a right front side member seal plate connection plate 11'.

[0070] That is, a rear seal plate section connected toward the A-pillar of the vehicle body is provided behind the left front side member seal plate 2 and the right front side member seal plate 2', and the rear seal plate section may have an upper and lower two-cavity structure. Correspondingly, a side member connecting plate similarly connected toward the A-pillar is provided behind the left front side member 1 and the right front side member 1', and the side member connecting plate similarly has an upper and lower two-cavity structure. The two cavities correspond one-to-one and are engaged to form a fourth cavity D and a fifth cavity E that are distributed vertically. The fourth cavity D may be connected to the front end position of the side sill 9, and the fifth cavity E may extend to the center of the A-pillar in the Z-axis direction. The fourth cavity D and the fifth cavity E are used to transmit the collision load received by the left front side member and the right front side member to the A-pillar and the side sill, further ensuring the safety of passengers in the passenger compartment.

[0071] In this embodiment, by limiting the specific extension directions of the fourth cavity D and the fifth cavity E, it is advantageous to guide the collision force, improve the efficiency of transmitting the collision load to the side sill and the A-pillar, and further improve safety performance.

[0072] Preferably, as shown in FIG. 5, the side member connecting plate and the seal plate connecting plate may each be formed as a substantially "M"-shaped structure, so that the connecting plate and the seal plate connecting plate can be arranged opposite each other during assembly, which is advantageous for quickly forming the fourth cavity D and the fifth cavity E.

[0073] In one embodiment of the present disclosure, the rear stages of the front side members include a left front side member rear stage 1a and a right front side member rear stage, and the left front side member rear stage 1a is connected to the left end portion, and the right front side member rear stage is connected to the right end portion. MemberThe rear section 1a of the left front side member may be connected to the lower plate 13 by overlapping the lower plate 13, and the rear section 1a of the left front side member may be close to the connection position between the left front side member and the dash panel. By connecting the end section to the front side member, it is advantageous for the connection position or the root section between the rear section of the front side member and the dash panel to transmit the acting force to the first cavity B.

[0074] In short, the vehicle body structure 100 according to an embodiment of the present disclosure can have functions such as a front cross member 6 for a dash panel and a front cross member for mounting a battery pack by engaging the front cross member upper plate 17 with the surrounding structure.

[0075] Furthermore, a vehicle according to an embodiment of the present disclosure includes the vehicle body structure 100 described in any of the above embodiments. Because the vehicle body structure 100 according to an embodiment of the present disclosure improves safety performance, the vehicle according to an embodiment of the present disclosure also has the above advantages, and a description thereof will be omitted here.

[0076] While several specific embodiments of the present disclosure have been described in detail using examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that modifications to the above examples can be made without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims. [Explanation of symbols]

[0077] 100 Body structure 1 Left front side member 1a Left front side member rear 1' Right front side member 2 Left front side member seal plate 2' Right front side member seal plate 6 Front cross member of dash panel 6a Left end cavity 6b Central cavity 9 Left side sill 9' Right side sill 11 Left front side member seal plate lower plate 11' Right front side member seal plate lower plate 12 Left front side member connecting plate lower plate 12' Right front side member connecting plate lower plate 13 Front cross member lower plate 13a Front cross member lower plate bottom surface 13b Upper elevation of lower plate of front cross member 13c Center surface of lower plate of front cross member 14 Lower dash panel 14a Bottom of dash panel 14b Dash panel lower section upper elevation 14c Center of the lower dash panel 15 Sealing Plate Assembly 16 Center tunnel 16b Center tunnel upper elevation 17 Front cross member upper plate 17a Front cross member upper plate lower elevation 17b Front cross member upper plate upper elevation 18 Upper dash panel 19. Left front subframe mounting point 19' Right front subframe mounting point 20 Left outer support plate 21 Left inner support plate 20' Right outer support plate 21' Right inner support plate 22 Central support plate 23 Left reinforcement plate for lower dash panel 23' Right reinforcement plate for lower dash panel A Second cavity B First cavity C. Third cavity D 4th cavity E 5th cavity

Claims

1. a front cross member upper plate, a dash panel, a front cross member lower plate, and a center tunnel extending along the front-rear direction of the vehicle body; At least a portion of the dash panel is provided rearward of the front cross member upper plate, At least a portion of the front cross member lower plate is provided below the front cross member upper plate and the dash panel, the front cross member lower plate, the front cross member upper plate, and the dash panel are engaged to define a first cavity, and portions of the front cross member lower plate, the front cross member upper plate, and the dash panel that form the first cavity are engaged to form a front cross member; the center tunnel is connected to the dash panel, and a connection position between the center tunnel and the dash panel is provided opposite the first cavity; The front cross member lower plate and the dash panel are engaged to define a second cavity. Body structure.

2. 2. The vehicle body structure according to claim 1, wherein a connection position between the center tunnel and the dash panel corresponds to a middle position of the first cavity in the up-down direction of the vehicle body.

3. Further including a front side member, 2. The vehicle body structure according to claim 1, wherein the front side members include a left front side member and a right front side member spaced apart along the left-right direction of the vehicle body, and the first cavity has ends connected to the left front side member and the right front side member at positions close to the left front side member and close to the right front side member, respectively, and the positions of the two ends in the fore-and-aft direction are forward of a center portion of the first cavity, and the center portion of the first cavity is a center portion of the first cavity in the left-and-right direction of the vehicle body.

4. 4. The vehicle body structure according to claim 3, wherein the end includes a left end and a right end spaced apart along the left-right direction of the vehicle body, the left end being connected to the left front side member, and the right end being connected to the right front side member.

5. The vehicle body structure according to claim 3 , wherein the two end portions are provided opposite to each other, and the two end portions and a central portion of the first cavity form a V-shaped structure.

6. 4. The vehicle body structure according to claim 3, wherein the cross-sectional area of ​​the central portion of the first cavity is 0.5 to 0.8 times the cross-sectional area of ​​the end portion.

7. The vehicle body structure according to claim 3 , wherein a cross-sectional area of ​​the first cavity gradually increases along a direction from a center portion of the first cavity toward the two ends.

8. Further comprising a support plate; 4. The vehicle body structure according to claim 3, wherein the support plate is provided in a central portion of the first cavity to reinforce the structure of the front cross member.

9. The vehicle body structure according to claim 1 , wherein a lower surface of at least a portion of the front cross member lower plate is parallel to a bottom surface of the vehicle body.

10. Further comprising a mounting portion; 4. The vehicle body structure according to claim 3, wherein the mounting portion is provided below the front cross member lower plate and is positioned between the left front side member and the right front side member, and mounts a front subframe.

11. 4. The vehicle body structure according to claim 3, further comprising a left reinforcing plate and a right reinforcing plate, the left reinforcing plate and the right reinforcing plate being located at positions of the front cross member lower plate corresponding to the left front side member and the right front side member, respectively, and the left reinforcing plate and the right reinforcing plate being engaged with the front cross member lower plate to form a third cavity.

12. 5. The vehicle body structure according to claim 4, wherein the front side member includes a front side member rear section, the front side member rear section being connected to a side sill member, the front side member rear section including a side member connecting plate and a side member seal plate connecting plate, the side member connecting plate and the side member seal plate connecting plate being engaged to form a fourth cavity and a fifth cavity, the fourth cavity extending from the front side member toward a front end position of the side sill member, and the fifth cavity extending from the front side member toward a central position in the up-down direction of an A-pillar of the vehicle body.

13. 13. The vehicle body structure according to claim 12, wherein the front side member rear section includes a left front side member rear section and a right front side member rear section, the left front side member rear section being connected to the left end section, and the right front side member rear section being connected to the right end section.

14. A vehicle comprising the body structure according to any one of claims 1 to 13.

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