Vehicle body structure and vehicle

Abstract

The invention provides a vehicle body structure and a vehicle. The vehicle body structure comprises a front auxiliary frame and connecting longitudinal beams arranged on the left side and the right side respectively. The front auxiliary frame is arranged below a front cabin in the front of a vehicle, and the connecting longitudinal beams on the two sides are located behind the front auxiliary frame and extend in the front-back direction of the whole vehicle. The front ends of the connecting longitudinal beams on the two sides are respectively connected with the front auxiliary frame, a front cross beam is connected between the connecting longitudinal beams on the two sides, the front cross beam is arranged close to the front auxiliary frame, and an oil tank mounting space is defined by the front auxiliary frame, the front cross beam and the connecting longitudinal beams on the two sides. According to the vehicle body structure, the connecting longitudinal beams connected with the front auxiliary frame and the front cross beam connected between the connecting longitudinal beams on the two sides are arranged, and the oil tank mounting space is formed among the front auxiliary frame, the front cross beam and the connecting longitudinal beams on the two sides, so that collision impact on the oil tank can be reduced, and the safety of the oil tank during vehicle collision can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a vehicle body structure. The present invention also relates to a vehicle provided with the above vehicle body structure. Background Art

[0002] In related technologies, for hybrid vehicles, such as PHEV (Plug-in hybrid electric vehicle) models, in their vehicle bodies, the fuel tank is usually arranged at the position of the rear floor at the rear of the vehicle, and the battery pack is generally arranged under the front floor. In the existing such arrangement, when the vehicle collides, especially when a rear collision occurs, the rear subframe is forced to move forward, which is likely to hit the fuel tank, and if the collision impact is large, it may even cause the fuel tank to leak and generate danger, which is not conducive to improving the collision safety of the fuel tank. Summary of the Invention

[0003] In view of this, the present invention aims to propose a vehicle body structure to improve the safety of the fuel tank during vehicle collision.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A vehicle body structure includes a front subframe and connecting longitudinal beams respectively arranged on the left and right sides;

[0006] The front subframe is arranged under the front engine compartment at the front of the vehicle, and the two connecting longitudinal beams are located behind the front subframe and both extend along the front-rear direction of the whole vehicle;

[0007] The front ends of the two connecting longitudinal beams are respectively connected to the front subframe, and a front cross beam is connected between the two connecting longitudinal beams. The front cross beam is arranged close to the front subframe, and the front subframe, the front cross beam, and the two connecting longitudinal beams enclose a fuel tank installation space.

[0008] Further, each connecting longitudinal beam includes a front longitudinal beam whose front end is connected to the front subframe, and the front cross beam is connected between the rear ends of the two front longitudinal beams.

[0009] Further, the rear part of the front subframe has a rear cross beam, and the front ends of the two front longitudinal beams are respectively connected to the left and right ends of the rear cross beam;

[0010] The rear cross beam, the front cross beam, and the two front longitudinal beams enclose the fuel tank installation space.

[0011] Further, along the front-to-rear direction of the whole vehicle, the distance between the two front longitudinal beams gradually decreases from front to rear, and viewed from the up-and-down direction of the whole vehicle, the fuel tank installation space formed by enclosing is trapezoidal with a gradually decreasing width from front to rear, or similar to a trapezoid with a gradually decreasing width from front to rear;

[0012] Wherein, the width is the width of the trapezoid in the left-right direction of the whole vehicle.

[0013] Further, both ends of the rear cross beam have connecting sections bent backward, the front ends of the front longitudinal beams on each side are connected to the corresponding connecting sections, and transverse reinforcing ribs are provided at the bending positions at both ends of the rear cross beam.

[0014] Further, the length of the rear cross beam in the left-right direction of the whole vehicle accounts for more than 50% of the width of the whole vehicle; and / or,

[0015] Connecting points for connecting to the upper body are respectively provided at both ends of the rear cross beam and the rear ends of the front longitudinal beams on both sides.

[0016] Further, the front subframe has front subframe longitudinal beams separately arranged on the left and right sides, and the rear ends of the front subframe longitudinal beams on both sides are both connected to the rear cross beam;

[0017] A front subframe middle cross beam is connected between the front subframe longitudinal beams on both sides, the front ends of the front subframe longitudinal beams on both sides are connected to the front subframe front cross beam, and a front subframe anti-collision beam connected to the front subframe front cross beam is provided at the front end of the front subframe.

[0018] Further, both of the front subframe longitudinal beams on both sides include a front longitudinal beam section and a rear longitudinal beam section connected by insertion, and the cross section of the front longitudinal beam section gradually decreases from front to rear, and the cross section of the front part of the rear longitudinal beam section gradually increases from front to rear.

[0019] Further, each connecting longitudinal beam further includes a rear longitudinal beam located at the rear end of the front longitudinal beam;

[0020] A rear cross beam is connected between the rear ends of the rear longitudinal beams on both sides, and the rear cross beam, the front cross beam, and the rear longitudinal beams on both sides enclose a battery pack installation space, and / or, connecting points for connecting to the upper body are provided at the rear ends of the rear longitudinal beams on both sides.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The vehicle body structure described in the present invention is provided with connecting longitudinal beams connected to the front subframe, and a front cross beam connected between the two connecting longitudinal beams on both sides, and a fuel tank installation space is formed among the front subframe, the front cross beam and the connecting longitudinal beams on both sides. During a vehicle collision, not only can the frame structure formed by the front subframe, the connecting longitudinal beams and the front cross beam be used to transfer and absorb the collision force, reducing the collision impact on the fuel tank, but also the fuel tank can slide along with the formed frame structure, further reducing the collision impact on the fuel tank, thereby improving the safety of the fuel tank during a vehicle collision.

[0023] In addition, the connecting longitudinal beam includes a connected front longitudinal beam, and the front cross beam is connected between the rear ends of the front longitudinal beams on both sides, which can be adapted to the layout requirements of the fuel tank and is conducive to the formation of the fuel tank layout space. The rear part of the front subframe has a rear cross beam, and the rear cross beam, the front cross beam and the front longitudinal beams on both sides enclose to form a fuel tank installation space, which can make the fuel tank installation position form a compact annular frame structure, and can better increase the safety of the fuel tank. The formed fuel tank installation space is trapezoidal or similar to a trapezoid. The characteristics of the large strength of the trapezoidal structure can be used to further increase the collision safety of the fuel tank installation position. At the same time, the trapezoidal width is set to gradually decrease from front to back, so that the beam structures forming the fuel tank installation space and other structures in the front subframe can provide support and protection together to resist the intrusion of front obstacles, which is beneficial to increasing the safety of the fuel tank.

[0024] Secondly, connecting sections bent backward are provided at both ends of the rear cross beam, which is convenient for the connection between the rear cross beam and the connecting longitudinal beams on both sides. Transverse reinforcing ribs are provided at the bending positions at both ends of the rear cross beam, which can increase the structural strength of the end positions of the rear cross beam and can avoid the bending deformation of the rear cross beam due to excessive single-point force during a vehicle frontal collision, especially a small overlap collision, which affects the safety of the fuel tank. The length of the rear cross beam accounts for more than 50% of the vehicle width, so that during a small overlap collision of the vehicle, there is an overlap amount between the rear cross beam and the barrier, which can ensure that the trapezoidal structure formed by the front subframe and the fuel tank installation position participates in the small overlap collision condition, which is beneficial to the transfer and decomposition of the small overlap collision force and can reduce the collision intrusion injury.

[0025] Furthermore, connection points for connecting to the upper body are provided at both ends of the rear crossmember and the rear ends of the front longitudinal beams on both sides. By means of the connected upper body frame, the stiffness at both ends of the rear crossmember and the rear ends of the front longitudinal beams can be increased, which helps to improve the collision force absorption and transmission capabilities. The settings of the middle crossmember and the front crossmember of the front subframe in the front subframe can cooperate to form a fuel tank installation space, forming multiple annular structures at the front of the body, which can increase the overall stiffness of the front of the body, is beneficial to improving the safety of the fuel tank and the NVH performance of the vehicle. The front subframe longitudinal beam includes a front longitudinal beam section and a rear longitudinal beam section that are inserted and connected, and the cross-section of the front longitudinal beam section is set to gradually decrease from front to back, and the cross-section of the front part of the rear longitudinal beam section is set to gradually increase from front to back. This can guide the front subframe longitudinal beam to bend and deform at the insertion position during a collision, and can absorb collision energy through the front part of the front subframe to protect the fuel tank at the rear.

[0026] In addition, the connecting longitudinal beam further includes a rear longitudinal beam, which can form a tee structure between the connecting longitudinal beam and the front crossmember. All three paths serve as force transmission beams, which can not only increase the support for the fuel tank installation position and prevent its deformation, but also facilitate the transmission and dispersion of collision forces. A rear crossmember is connected between the rear ends of the rear longitudinal beams on both sides to form a battery pack installation space. The annular frame structure formed by the front crossmember, the rear crossmember and the rear longitudinal beams on both sides can be used to increase the collision safety of the battery pack. A connection point for connecting to the upper body is provided at the rear end of the rear longitudinal beam, and the stiffness of the rear longitudinal beam can also be increased by means of the upper body frame, which can better improve the absorption and transmission effects of the rear longitudinal beam on collision forces.

[0027] Another object of the present invention is to propose a vehicle provided with the above-mentioned body structure.

[0028] The vehicle according to the present invention has the same beneficial effects as the above-mentioned body structure, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic 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 drawings:

[0030] Figure 1 is a schematic diagram of the body structure according to an embodiment of the present invention;

[0031] Figure 2 is Figure 1 a schematic diagram of the structure without a fuel tank;

[0032] Figure 3 is a schematic diagram of the front subframe according to an embodiment of the present invention;

[0033] Figure 4 is Figure 3 a schematic diagram of some structures in;

[0034] Figure 5 Schematic diagram of collision force transmission of the vehicle body structure according to an embodiment of the present invention;

[0035] Figure 6 Schematic diagram of the structure of the vehicle body chassis frame according to an embodiment of the present invention;

[0036] Explanation of reference numerals:

[0037] 1, front subframe; 2, connecting longitudinal beam; 3, front cross beam; 4, rear cross beam; 5, rear subframe;

[0038] 101, front subframe longitudinal beam; 1011, front section of the longitudinal beam; 1012, rear section of the longitudinal beam; 1012a, front part of the rear section of the longitudinal beam; 102, front cross beam of the front subframe; 103, middle cross beam of the front subframe; 104, rear cross beam; 104a, connecting section; 104b, transverse reinforcing rib; 105, front subframe anti-collision beam; 106, front subframe energy absorption box; 201, front longitudinal beam; 202, rear longitudinal beam;

[0039] 100, fuel tank;

[0040] M, fuel tank installation space; N, battery pack installation space; k, length of the rear cross beam; s, connection point connected to the upper vehicle body. Detailed implementation manners

[0041] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0042] In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, 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 should not be construed as a limitation to the present invention. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", "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 directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. 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 situations.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0045] Embodiment 1

[0046] This embodiment relates to a vehicle body structure, which combines Figure 1 and Figure 2 as shown in, and includes a front subframe 1 and connecting longitudinal beams 2 respectively arranged on the left and right sides.

[0047] Among them, in the whole vehicle, the front subframe 1 is arranged below the front engine compartment at the front of the vehicle, and the two connecting longitudinal beams 2 are located behind the front subframe 1 and both extend along the front-rear direction of the whole vehicle.

[0048] At the same time, the front ends of the two connecting longitudinal beams 2 are respectively connected to the front subframe 1, and a front cross beam 3 is connected between the two connecting longitudinal beams 2. The front cross beam 3 is arranged close to the front subframe 1, and the above-mentioned front subframe 1, front cross beam 3, and two connecting longitudinal beams 2 also enclose a fuel tank installation space M for installing the fuel tank 100.

[0049] At this time, with the above settings, by setting the connecting longitudinal beams 2 connected to the front subframe 1, the front cross beam 3 connected between the two connecting longitudinal beams 2, and forming a fuel tank installation space M between the front subframe 1, the front cross beam 3 and the two connecting longitudinal beams 2, in the event of a vehicle collision, not only can the frame structure formed by the front subframe 1, the connecting longitudinal beams 2 and the front cross beam 3 be used to transmit and absorb the collision force, reduce the collision impact on the fuel tank 100, but also the fuel tank 100 can slide along with the formed frame structure, which can further reduce the collision impact on the fuel tank 100, and thus achieve the effect of improving the collision safety of the fuel tank 100.

[0050] Based on the above overall introduction, specifically, still as Figure 2 shown in, as a preferred implementation form, each connecting longitudinal beam 2 on each side includes a front longitudinal beam 201 whose front end is connected to the front subframe 1, and the above-mentioned front cross beam 3 is connected between the rear ends of the two front longitudinal beams 201. Moreover, on the basis of including the above-mentioned front longitudinal beam 201, also as a preferred implementation form, in this embodiment, the two connecting longitudinal beams 2 on both sides further include rear longitudinal beams 202 connected to the rear ends of the front longitudinal beams 201.

[0051] At this time, each side connecting longitudinal beam 2 includes a connected front longitudinal beam 201 and a rear longitudinal beam 202, and the front cross beam 3 is connected between the rear ends of the two side front longitudinal beams 201. On the one hand, it can be adapted to the layout requirements of the fuel tank 100, which is conducive to the formation of the fuel tank layout space M. On the other hand, it can be understood that it can also form a tee structure between the connecting longitudinal beam 2 and the front cross beam 3, and all three paths in the tee structure serve as force transmission beams. Thus, not only can the support for the fuel tank installation position M be increased to prevent its deformation, but also it is beneficial to the transmission and dispersion of collision forces.

[0052] In this embodiment, for the above-mentioned fuel tank installation space M, as an exemplary implementation form, the rear part of the front subframe 1 has a rear cross beam 104. The front ends of the two side front longitudinal beams 201 are respectively connected to the left and right ends of the rear cross beam 104, and the above-mentioned fuel tank installation space M is specifically formed by enclosing the rear cross beam 104, the front cross beam 3, and the two side front longitudinal beams 201.

[0053] At this time, by making the rear part of the front subframe 1 have a rear cross beam 104, and making the rear cross beam 104, the front cross beam 3, and the two side front longitudinal beams 201 enclose to form the fuel tank installation space M, it can be understood that it can, as Figure 2 shown, make the installation position of the fuel tank 100 form a compact ring frame structure, thereby being able to better increase the safety of the fuel tank 100.

[0054] In addition, it should be noted that, as a preferred implementation form, the above-mentioned rear cross beam 104 can be a part of the front subframe 1, and specifically be the front subframe rear cross beam located at the rear end of the front subframe 1. However, in addition to being the front subframe rear cross beam, of course, the rear cross beam 104 of this embodiment can also be connected between the front ends of the two side connecting longitudinal beams 2 and be a beam structure independently arranged from the front subframe 1. And at this time, while the rear cross beam 104 is integrally connected with the two side connecting longitudinal beams 2 to form a frame structure, it is also connected to the front subframe 1 to realize the connection between the two side connecting longitudinal beams 2 and the front subframe 1.

[0055] In this embodiment, it is worth noting that when the front cross beam 104 is independently arranged from the front subframe 1, its connection with the front subframe 1 is generally also connected to the rear ends of the two side front subframe longitudinal beams 101. Moreover, when the front cross beam 104 is independently arranged from the front subframe 1, for the front subframe rear cross beam in the front subframe 1, it can be selectively set as needed.

[0056] Still taking the above-mentioned rear cross beam 104 as the front subframe rear cross beam as an example, in specific implementation, the front subframe 1 of this embodiment can draw on the front subframe structure in the existing load-bearing body, and generally speaking, in combination with Figure 3As shown in the figure, the front subframe longitudinal beams 101 are arranged on the left and right sides in the front subframe 1, and the rear ends of the front subframe longitudinal beams 101 on both sides are connected to the front cross beam 104 which serves as the rear cross beam of the front subframe. In addition, a front subframe middle cross beam 103 is connected between the front subframe longitudinal beams 101 on both sides, and the front ends of the front subframe longitudinal beams 101 on both sides are also connected to the front subframe front cross beam 102, and a front subframe anti-collision beam 105 connected to the front subframe front cross beam 102 is arranged at the front end of the front subframe 1.

[0057] It can be understood that through the arrangement of the front subframe middle cross beam 103 and the front subframe front cross beam 102 in the front subframe 1, this embodiment can obviously cooperate to form a fuel tank installation space M, forming a plurality of annular structures in the front part of the vehicle body, thereby increasing the overall stiffness of the front part of the vehicle body, being beneficial to improving the safety of the fuel tank 100 and the NVH (Noise, Vibration, Harshness) performance of the vehicle.

[0058] In addition, it should be noted that in specific implementation, preferably, in this embodiment, front subframe energy absorption boxes 106 arranged on the left and right sides can also be provided on the front side of the front subframe front cross beam 102, and the above-mentioned front subframe anti-collision beam 105 is connected to the front subframe front cross beam 102 through the front subframe energy absorption boxes 106 on both sides. In this way, through the arrangement of the front subframe energy absorption boxes 106 on both sides, the ability to absorb collision forces can be increased during vehicle collision, especially in a frontal collision, so as to reduce the damage caused by the collision.

[0059] In this embodiment, still as Figure 2 shown, as a preferred implementation form, along the front-rear direction of the whole vehicle from front to rear, the distance between the front longitudinal beams 201 on both sides is also set to gradually decrease, and from the perspective of the up-down direction of the whole vehicle, the fuel tank installation space M formed by surrounding is similar to a trapezoid with a gradually decreasing width from front to rear. Among them, the above-mentioned width is specifically the width of the trapezoid in the left-right direction of the whole vehicle.

[0060] At this time, making the formed fuel tank installation space M similar to a trapezoid can make use of the characteristics of the large strength of the trapezoidal structure to further increase the collision safety of the installation position of the fuel tank 100. At the same time, it can also make use of the gradually decreasing width of the trapezoid from front to rear, so that the beam structures forming the fuel tank installation space M and other structures in the front subframe 1 together provide support and protection to resist the intrusion of front obstacles, which is beneficial to increasing the safety of the fuel tank 100.

[0061] Of course, it should be noted that, in addition to the above-mentioned, making the formed fuel tank installation space M similar to a trapezoid, in actual implementation, making the formed fuel tank installation space M exactly trapezoidal, and also a trapezoid with a gradually decreasing width from front to back, is also acceptable. Moreover, when the formed fuel tank installation space M is exactly trapezoidal, it can also increase the safety of the fuel tank 100.

[0062] In this embodiment, as a preferred implementation form, continue as Figure 3 shown, both ends of the rear cross member 104 have connecting sections 104a bent backward, and the front ends of each side front longitudinal beam 201 are connected to the corresponding connecting sections 104a, and transverse reinforcing ribs 104b are also provided at the bending positions at both ends of the rear cross member 104. At this time, by providing the connecting sections 104a bent backward at both ends of the rear cross member 104, it can be understood that it can facilitate the connection between the rear cross member 104 and the two side connecting longitudinal beams 2. And by providing the transverse reinforcing ribs 104b at the bending positions at both ends of the rear cross member 104, it can increase the structural strength of the end positions of the rear cross member 104, and can avoid the rear cross member 104 from being bent and deformed due to excessive single-point force during a frontal collision of the vehicle, especially a small overlap collision, which affects the safety of the fuel tank 100.

[0063] In actual implementation, based on the above-mentioned rear cross member 104, and generally the beam bodies in the front subframe 1 are all hollow beam structures buckled together, so when preparing the components (usually the upper half beam body and the lower half beam body) constituting the rear cross member 104, the transverse reinforcing ribs 104b can be integrally prepared on the components of the rear cross member 104 by stamping.

[0064] In this embodiment, combined with Figure 5 shown, as a preferred implementation form, on the basis that the fuel tank installation space M formed by enclosing the rear cross member 104, the front cross member 3 and the two side front longitudinal beams 201 is trapezoidal, the length k of the rear cross member 104 in the left-right direction of the whole vehicle can be set to be more than 50% of the width of the whole vehicle, for example.

[0065] In this way, by making the length k of the rear cross member 104 more than 50% of the width of the whole vehicle, when the vehicle has a small overlap collision, there will be an overlap amount between the rear cross member 104 and the collision barrier, which can ensure that the trapezoidal structure formed by the front subframe 1 and the installation position of the fuel tank 100 participates in the small overlap collision condition, is conducive to the transfer and decomposition of the small overlap collision force, and can reduce the collision intrusion injury.

[0066] In actual implementation, the percentage of the length k of the rear cross member 104 in the left-right direction of the whole vehicle to the width of the whole vehicle can be, for example, 50%, 52%, 53%, 54% or 55%, etc.

[0067] In this embodiment, from Figure 3 , and continue to combineFigure 4 As shown in Figure 4 , as a preferred implementation form, for the front subframe longitudinal beams 101 on both sides of the front subframe 1, in terms of specific structure, each side's front subframe longitudinal beam 101 includes a front longitudinal beam section 1011 and a rear longitudinal beam section 1012 that are plugged and connected. Moreover, the cross-section of the front longitudinal beam section 1011 is set to gradually decrease from front to back, and the front part of the rear longitudinal beam section 1012, that is Figure 4 the cross-section of the front part of the rear longitudinal beam section 1012a in Figure 4 is set to gradually increase from front to back.

[0068] At this time, by making the front subframe longitudinal beam 101 include a front longitudinal beam section 1011 and a rear longitudinal beam section 1012 that are plugged and connected, and making the cross-section of the front longitudinal beam section 1011 gradually decrease from front to back, and the cross-section of the front part of the rear longitudinal beam section 1012 gradually increase from front to back. It can be understood that, compared with the situation where the cross-section is the same before and after or the cross-section changes uniformly in one direction, this embodiment can guide the front subframe longitudinal beam 101 to bend and deform at the plugging position during a collision, and then utilize the bending of the front subframe longitudinal beams 101 on both sides to absorb the collision energy at the front of the front subframe 1, so as to achieve the effect of protecting the fuel tank 100 at the rear.

[0069] In addition, during specific implementation, for the plugging setting between the front and rear longitudinal beam sections, for example, the front end of the rear longitudinal beam section 1012 can be inserted into the front longitudinal beam section 1011, and after the two are plugged together, they are also fixedly connected by welding.

[0070] In this embodiment, continue to refer to Figure 1 and Figure 2 As shown in Figure 2 , as a preferred implementation form, in addition to connecting a front cross beam 3 between the rear ends of the front longitudinal beams 201 on both sides, a rear cross beam 4 is also connected between the rear ends of the rear longitudinal beams 202 on both sides, and the rear cross beam 4 also forms a battery pack installation space N for setting a battery pack (not shown in the figure) together with the front cross beam 3 and the rear longitudinal beams 202 on both sides.

[0071] In this way, by connecting a rear cross beam 4 between the rear ends of the rear longitudinal beams 202 on both sides and forming a battery pack installation space N, it can be understood that, similar to the fuel tank installation space M formed above, this embodiment can also utilize the annular frame structure formed by the front cross beam 3, the rear cross beam 4 and the rear longitudinal beams 202 on both sides to increase the collision safety of the battery pack.

[0072] In this embodiment, as a preferred implementation form, still as Figure 2As shown, connection points s for connecting to the upper body are respectively provided at both ends of the rear cross member 104 and at the rear ends of the front longitudinal members 201 on both sides. At this time, by providing the connection points s for connecting to the upper body at both ends of the rear cross member 104 and at the rear ends of the front longitudinal members 201 on both sides, the stiffness of the positions at both ends of the rear cross member 104 and the rear ends of the front longitudinal members 201 can be increased by means of the connected upper body frame, which helps to improve the collision force absorption and transmission capabilities.

[0073] In addition, in addition to the connection points s arranged as above, preferably, in this embodiment, connection points s for connecting to the upper body are also provided at the rear ends of the rear longitudinal members 202 on both sides. In this way, by providing the connection points s for connecting to the upper body at the rear ends of the rear longitudinal members 202, it is obvious that the stiffness of the rear longitudinal members 202 can also be increased by means of the upper body frame, so as to better improve the collision force absorption and transmission effects of the rear longitudinal members 202.

[0074] It should be noted that in addition to the above connection points s, to meet the connection requirements with the upper body, of course, still referring to Figure 2 , in this embodiment, connection points s are generally provided at both ends of the front cross member 102 of the front subframe and at positions on the rear cross member 104 close to the connection points of the front subframe longitudinal members 101 on both sides. And, in specific implementation, the above connection points s can adopt fixedly arranged connection sleeves, for example, so as to be connected to the upper body through the connection bolts passing through the communication sleeves.

[0075] The body structure of this embodiment is arranged as above. By providing the connection longitudinal members 2 connected to the front subframe 1 and the front cross member 3 connected between the connection longitudinal members 2 on both sides, a fuel tank installation space M is formed between the front subframe 1, the front cross member 3 and the connection longitudinal members 2 on both sides. During a vehicle collision, this embodiment can not only utilize the frame structure formed by the front subframe 1, the connection longitudinal members 2 and the front cross member 3 to transmit and absorb the collision force, reduce the collision impact on the fuel tank 100, but also enable the fuel tank 100 to slide along with the formed frame structure, further reducing the collision impact on the fuel tank 100, thereby improving the collision safety of the fuel tank 100.

[0076] In addition, still as Figure 5 shown, when the body structure of this embodiment collides, and for example, in a vehicle frontal collision, the collision force is transmitted to the front subframe longitudinal member 101 through the front subframe anti-collision beam 105. Then, a part of the collision force can be transmitted to the connection longitudinal member 2 and dispersed rearward along the connection longitudinal member 2, while other collision forces can be transmitted laterally (i.e., in the left-right direction of the whole vehicle) along the front cross member 102, the front subframe middle cross member 103, the rear cross member 104, as well as the front cross member 3 and the rear cross member 4 arranged in sequence.

[0077] Thus, through the absorption of collision energy by the front subframe anti-collision beam 105 and the front subframe energy-absorbing box 106 in the vehicle body structure, the transmission and dispersion of the collision force by the rear beams, and the absorption of collision energy during the transmission process, this embodiment can effectively reduce the collision force transmitted to the fuel tank 100 and the battery pack, thereby enhancing the safety of the fuel tank 100 and the battery pack.

[0078] Embodiment Two

[0079] This embodiment relates to a vehicle equipped with the vehicle body structure in Embodiment One.

[0080] Among them, in the vehicle of this embodiment, as a preferred implementation form, continuing to combine Figure 6 As shown, for example, the rear ends of the two side connecting longitudinal beams 2 can be connected to the rear subframe 5 under the rear floor of the vehicle rear. At this time, the front subframe 1, the two side connecting longitudinal beams 2, and the rear subframe 5 together constitute the vehicle body chassis framework at the bottom of the vehicle. Furthermore, when the fuel tank 100 and the battery pack (not shown in the figure) are lapped on this vehicle body chassis framework, it also constitutes the chassis structure in the vehicle body.

[0081] At this time, regarding the chassis structure formed in this embodiment, it is worth noting that the traditional vehicle body structure mainly includes a monocoque body and a body-on-frame. The differences between the two lie in aspects such as structure, weight, and riding comfort.

[0082] The body-on-frame is generally composed of a frame girder and a body. The frame is responsible for installing components such as the engine, transmission, and suspension. The body only provides the enclosed environment required for driving and riding and does not bear the load. At the same time, the body-on-frame is relatively heavy, has a high center of gravity, relatively poor handling performance, and lower comfort when driving on paved roads. However, due to the frame girder being able to provide good stiffness, the chassis has high strength, good anti-bump performance, good stability and safety, and is also easy to modify.

[0083] The monocoque body has no rigid frame. The components in the vehicle are directly installed on the body. The entire body serves as a force-bearing structure and bears the action of various load forces. At the same time, the monocoque body is lighter in weight, has a low center of gravity, good handling performance, is easy to assemble, and can also obtain better comfort when driving on paved roads. However, the monocoque body has relatively weak torsional rigidity and load-bearing capacity. And due to the absence of a rigid frame, usually only parts such as the front end, side panels, rear end, and floor are strengthened, and the overall safety is relatively poor.

[0084] Based on the above introduction, for new energy vehicle models, especially hybrid vehicle models among them, to make full use of the advantages of the unibody structure and to improve the deficiencies of the unibody structure. On the basis of the body structure in the first embodiment, this embodiment creatively proposes the above-mentioned body chassis structure developed based on the unibody structure by connecting the longitudinal beams 2 on both sides to the rear subframe 5.

[0085] Thus, by adopting the unibody structure with front and rear subframes, this embodiment can not only utilize the characteristic of the relatively small weight of the unibody structure to achieve vehicle body lightweighting and improve the overall vehicle endurance. At the same time, through the arrangement of the longitudinal beams 2 on both sides, connecting the front and rear subframes into one body, and jointly enclosing the fuel tank installation space M and the battery pack installation space N by the front subframe 1, the rear subframe 2, the longitudinal beams 2 on both sides, and the front cross beam 3, etc., this embodiment can also form multiple annular frame structures by means of the connection setting of the longitudinal beams 2, so that the fuel tank 100 and the battery pack can move together with the annular frame structure when the vehicle collides, thereby being able to reduce the collision impact on the fuel tank 100 and the battery pack, so as to achieve the effect of increasing the collision safety of the fuel tank 100 and the battery pack.

[0086] In addition, in the above-mentioned chassis structure of this embodiment, since the front and rear ends of the chassis are still the front and rear subframes, and through Figure 6 It can be seen that the cross-sectional area of the front and rear subframe structures in the Y direction (i.e., the left-right direction of the whole vehicle) of the frame in the non-unibody structure is smaller, and the subframe longitudinal beams at the positions of the front and rear subframes still use the curved longitudinal beam structure. In this way, it makes the chassis structure of this embodiment an innovative structure in the form of a subframe, which is significantly different from the conventional non-unibody frame girder structure. Specifically, the front and rear subframes in this embodiment are still separate units, which only further add the connecting longitudinal beams 2 for front and rear connection on the basis of the front and rear subframes in the unibody structure, rather than the integral girder structure in the non-unibody structure.

[0087] Of course, precisely because of adopting the integrated structure of the front and rear subframes connected by the longitudinal beams 2, as mentioned in the previous text, this embodiment can not only utilize the characteristics of the unibody structure to reduce the vehicle body weight to increase the overall vehicle endurance, but also form an annular protection frame to better improve the collision safety of the fuel tank 100 and the battery pack.

[0088] Therefore, by forming the above-mentioned chassis structure, the vehicle of this embodiment not only improves the deficiencies existing in the unibody structure, but also can have the advantages of the non-unibody structure, which can well improve the overall quality of the vehicle and has good practicability.

[0089] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vehicle body structure, characterized in that: It includes a front subframe (1), and connecting longitudinal beams (2) respectively arranged on the left and right sides; The front subframe (1) is arranged below the front engine compartment at the front of the vehicle, and the two connecting longitudinal beams (2) are located behind the front subframe (1) and both extend along the front-rear direction of the whole vehicle; The front ends of the two connecting longitudinal beams (2) are respectively connected to the front subframe (1), and a front cross beam (3) is connected between the two connecting longitudinal beams (2). The front cross beam (3) is arranged close to the front subframe (1), and the front subframe (1), the front cross beam (3), and the two connecting longitudinal beams (2) enclose a fuel tank installation space (M).

2. The vehicle body structure according to claim 1, characterized in that: Each connecting longitudinal beam (2) includes a front longitudinal beam (201) whose front end is connected to the front subframe (1), and the front cross beam (3) is connected between the rear ends of the two front longitudinal beams (201).

3. The vehicle body structure according to claim 2, characterized in that: The rear part of the front subframe (1) has a rear cross beam (104), and the front ends of the two front longitudinal beams (201) are respectively connected to the left and right ends of the rear cross beam (104); The rear cross beam (104), the front cross beam (3), and the two front longitudinal beams (201) enclose the fuel tank installation space (M).

4. The vehicle body structure according to claim 3, characterized in that: Along the front-rear direction of the whole vehicle from front to back, the distance between the two front longitudinal beams (201) is gradually reduced, and from the perspective of the up-down direction of the whole vehicle, the enclosed fuel tank installation space (M) is in the shape of a trapezoid with a gradually decreasing width from front to back, or similar to a trapezoid with a gradually decreasing width from front to back; Wherein, the width is the width of the trapezoid in the left-right direction of the whole vehicle.

5. The vehicle body structure according to claim 4, characterized in that: Both ends of the rear cross beam (104) have connecting sections (104a) bent backward, the front end of each front longitudinal beam (201) is connected to the corresponding connecting section (104a), and transverse reinforcing ribs (104b) are provided at the bending positions at both ends of the rear cross beam (104).

6. The vehicle body structure according to claim 5, characterized in that: The length (k) of the rear cross beam (104) in the left-right direction of the whole vehicle accounts for more than 50% of the width of the whole vehicle; and / or, Connection points (s) for connecting to the upper vehicle body are respectively provided at both ends of the rear cross beam (104) and the rear ends of the two front longitudinal beams (201).

7. The vehicle body structure according to claim 3, characterized in that: The front subframe (1) has front subframe longitudinal beams (101) respectively arranged on the left and right sides, and the rear ends of the two front subframe longitudinal beams (101) are both connected to the rear cross beam (104); A front subframe middle cross member (103) is connected between the two front subframe longitudinal beams (101). The front ends of the two front subframe longitudinal beams (101) are connected to a front subframe front cross member (102), and a front subframe anti-collision beam (105) connected to the front subframe front cross member (102) is provided at the front end of the front subframe (1).

8. The vehicle body structure according to claim 7, wherein: Each of the two front subframe longitudinal beams (101) includes a front longitudinal beam section (1011) and a rear longitudinal beam section (1012) connected by insertion. The cross-section of the front longitudinal beam section (1011) is gradually decreasing from front to back, and the cross-section of the front part of the rear longitudinal beam section (1012) is gradually increasing from front to back.

9. The vehicle body structure according to any one of claims 2 to 8, wherein: Each side of the connecting longitudinal beam (2) further includes a rear longitudinal beam (202) located at the rear end of the front longitudinal beam (201); A rear cross member (4) is connected between the rear ends of the two rear longitudinal beams (202). The rear cross member (4), the front cross member (3), and the two rear longitudinal beams (202) on both sides enclose a battery pack installation space (N), and / or connection points (s) connected to the upper vehicle body are provided at the rear ends of the two rear longitudinal beams (202).

10. A vehicle, wherein: The vehicle is provided with the vehicle body structure according to any one of claims 1 to 9.

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