Vehicle body front floor assembly and vehicle

Abstract

The utility model provides a vehicle body front floor assembly and a vehicle. The vehicle body front floor assembly comprises threshold beams arranged on the left side and the right side respectively and a seat cross beam connected between the threshold beams on the two sides. The seat cross beams comprise a front seat cross beam and a rear seat cross beam which are arranged front and back in a spaced mode, the side, connected with the threshold beams, of the end of at least one seat cross beam is arranged upwards in an inclined mode, and when the threshold beams on all the sides are subjected to collision force from the side face of the whole vehicle, the front seat cross beam and the rear seat cross beam are arranged upwards in an inclined mode. Collision force from the doorsill beam can be decomposed and transmitted on the seat cross beam in the left-right direction and the up-down direction of the whole vehicle. The side, connected with the doorsill beam, of the end of the seat cross beam is arranged obliquely upwards, so that collision impact on the battery pack can be reduced during side collision of the vehicle, the fire risk of the battery pack is reduced, and the collision safety of the whole vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle bodies, and in particular to a vehicle body front floor assembly. The utility model also relates to a vehicle provided with the vehicle body front floor assembly. Background Art

[0002] With the increasing popularity of new energy vehicles, people are paying more and more attention to their collision safety. In existing new energy vehicles, the battery pack is generally set at the bottom of the front floor. At this time, due to the traditional body structure, the force transmission path of the seat beam on the front floor is horizontal and lateral when the vehicle is in a side collision. Under the lateral squeezing effect of the side collision force, the seat beam will be deformed, and after the squeezing and deformation, the seat beam will invade the front floor in both the upper and lower directions. When the front floor invades downward, it is easy to collide with the battery pack, causing the battery cell to be damaged by force, and the battery pack to be damaged. In severe cases, it may even cause the battery pack to catch fire, endangering the lives of the driver and passengers, and is not conducive to improving the collision safety of the entire vehicle. Utility Model Content

[0003] In view of this, the utility model aims to provide a vehicle body front floor assembly to improve the collision safety of the entire vehicle.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A vehicle body front floor assembly comprises door sill beams arranged on left and right sides, and a seat cross beam connected between the door sill beams on both sides;

[0006] The seat cross beam comprises a front seat cross beam and a rear seat cross beam which are spaced apart from each other in the front and rear direction, wherein the end of at least one seat cross beam is arranged obliquely upward on one side connected to the door sill beam, and when the door sill beams on each side are subjected to a collision force from the side of the vehicle, the collision force from the door sill beam can be decomposed and transmitted on the seat cross beam in two directions, the left-right direction of the vehicle and the up-down direction of the vehicle.

[0007] Furthermore, the front seat cross beam and the rear seat cross beam are both integrally arc-shaped structures that gradually arch upward from the left and right ends to the middle in the left and right directions of the vehicle, and the curvature of the front seat cross beam is different from that of the rear seat cross beam.

[0008] Further, the seat cross beam is transitionally connected to the threshold beams on each side via a connecting bracket, and the seat cross beam is roll-formed or stamped; and / or,

[0009] The seat crossbeam and the door sill beams on both sides are made of extruded aluminum, and the seat crossbeam and the door sill beams on each side are fixedly connected together after being plugged in through a plug-in structure.

[0010] Further, from the front-rear direction of the vehicle, the angle α between the tangent line L at each end of each seat cross beam and the left-right direction of the vehicle satisfies: 6°≤α≤15°; and / or,

[0011] The radius R of each seat cross beam satisfies: 1.5 vehicle width ≤ R ≤ 3.5 vehicle width.

[0012] Furthermore, it also includes a front floor panel connected between the door sill beams on both sides, and the front floor panel is divided by the rear seat cross beam into a front panel located in front of the rear seat cross beam and a rear panel located in rear of the rear seat cross beam;

[0013] The front panel is provided with a central channel bulging upwards, the front seat crossbeam spans over the central channel and is connected to the top of the central channel, and the curvature of the front seat crossbeam is smaller than that of the rear seat crossbeam.

[0014] Further, the rear end of the central channel is connected to the rear seat crossbeam; and / or,

[0015] The rear end of the front panel and the front end of the rear panel are both connected to the rear seat cross beam, and from the front-to-back direction of the vehicle, at least the rear end of the front panel and the front end of the rear panel are arranged to be arched upwards following the rear seat cross beam.

[0016] Furthermore, it also includes a front floor upper longitudinal beam disposed above the front floor panel, and the front floor upper longitudinal beams are respectively disposed on the left and right sides of the middle channel;

[0017] The upper longitudinal beams on the front floor on both sides extend along the front and rear directions of the vehicle, and the front ends of the upper longitudinal beams on the front floor on each side extend forward of the front floor panel, and the rear ends of the upper longitudinal beams on the front floor on each side pass through the avoidance space formed between the front seat cross beam and the front floor panel, and extend to connect with the rear seat cross beam.

[0018] Furthermore, from the vertical direction of the vehicle, the rear seat cross beam is arranged close to the front side of the left and right B-pillars;

[0019] End reinforcement brackets are respectively arranged between the rear seat cross beam and the door sill beams on both sides, and the end reinforcement brackets on both sides are located at the rear side of the rear seat cross beam.

[0020] Further, viewed from the left and right direction of the vehicle, the end section of the front seat cross beam has a first portion corresponding to the side of the door sill beam and a second portion corresponding to the top of the door sill beam, and the cross-sectional dimension of the first portion is greater than the cross-sectional dimension of the second portion; and / or,

[0021] The entire end portion of the rear seat cross beam is disposed corresponding to the side portion of the door sill beam.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] The vehicle body front floor assembly described in the utility model is arranged obliquely upward by making the end of the seat cross beam connected to the side of the door sill beam. When the vehicle has a side collision, when the collision force is transmitted along the seat cross beams, in addition to the horizontal force, there will also be a vertical component force, and the vertical component force will guide the seat cross beams to deform upward, so as to prevent the seat cross beams from squeezing the front floor structure and invading downward after deformation, squeezing the battery pack space and causing damage to the battery pack, which helps to reduce the collision impact on the battery pack and the risk of battery pack fire, thereby improving the collision safety of the entire vehicle.

[0024] Another object of the present invention is to provide a vehicle, wherein the vehicle is provided with the vehicle body front floor assembly as described above.

[0025] The vehicle described in the utility model has the same beneficial effects as the above-mentioned vehicle body front floor assembly, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of a vehicle body front floor assembly according to an embodiment of the utility model;

[0028] Figure 2 for Figure 1 a top view of the structure shown;

[0029] Figure 3 It is a schematic diagram of the rear end of the front panel according to the embodiment of the utility model being arched upward along with the rear seat cross beam;

[0030] Figure 4 It is a schematic diagram of the front end of the rear panel according to the embodiment of the utility model being arched upward along with the rear seat crossbeam;

[0031] Figure 5 It is a schematic diagram of the connection between the rear seat cross beam and the front panel and the rear panel according to an embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of the connection between the first and second seat cross beams and the threshold beam according to an embodiment of the utility model;

[0033] Figure 7 for Figure 2 Cross-section at the AA position;

[0034] Figure 8 for Figure 1 Schematic diagram of the structure of the middle part;

[0035] Fig. 9 This is a schematic diagram of the connection between the seat crossbeam and the door sill beam according to the embodiment of the utility model when extruded aluminum is used;

[0036] Fig.10 Schematic diagram of the angle α between the tangent line L at the end of the seat cross beam and the left-right direction of the vehicle, taking the front seat cross beam as an example;

[0037] Fig.11 A schematic diagram of the radius of a seat cross beam, taking the front seat cross beam as an example;

[0038] Fig.12 It is a schematic diagram of the corresponding arrangement between the end section of the front seat cross beam and the door sill beam according to the embodiment of the utility model;

[0039] Fig.13 It is a schematic diagram of the corresponding arrangement between the end section of the rear seat cross beam and the door sill beam according to the embodiment of the utility model;

[0040] Description of reference numerals:

[0041] 1. Door sill beam; 2. Front floor panel; 3. Seat crossbeam; 4. B-pillar; 5. First connecting bracket; 6. Second connecting bracket; 7. End reinforcement bracket; 8. Seat front mounting bracket; 9. Second seat rear mounting bracket; 10. First seat rear mounting bracket; 11. Front floor longitudinal beam;

[0042] 1a, connecting groove; 201, front panel; 2011, middle channel; 202, rear panel; 301, front seat crossbeam; 302, rear seat crossbeam;

[0043] m, the second part corresponding to the top of the seat cross beam and the threshold beam; n, the first part corresponding to the side of the seat cross beam and the threshold beam; Q, the avoidance space. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0045] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] Embodiment 1

[0049] The present embodiment relates to a front floor assembly of a vehicle body, which is suitable for a new energy vehicle model provided with a battery pack, and the battery pack is located under the front floor. In addition, the front floor assembly of the vehicle body of the present embodiment can reduce the collision impact on the battery pack and reduce the risk of fire of the battery pack when the vehicle collides with the side through its structural design, which is beneficial to improving the collision safety of the entire vehicle.

[0050] In terms of overall structure, combined Figure 1 and Figure 2 As shown in , the vehicle body front floor assembly of this embodiment includes door sill beams 1 arranged on the left and right sides, and a seat cross beam 3 connected between the door sill beams 1 on both sides.

[0051] Among them, the seat cross beam 3 specifically includes a front seat cross beam 301 and a rear seat cross beam 302 arranged at intervals in the front and rear, and the end of at least one seat cross beam 3 is arranged obliquely upward on one side connected to the door sill beam 1, and when the door sill beam 1 on each side is subjected to a collision force from the side of the vehicle, the collision force from the door sill beam 1 can be decomposed and transmitted on the seat cross beam 3 in two directions: the left-right direction of the vehicle and the up-down direction of the vehicle.

[0052] At this time, as set above, by making the end of the seat cross beam 3 connected to the door sill beam 1 be inclined upward, and when the vehicle collides sideways, the collision force from the door sill beam 1 can be decomposed and transmitted on the seat cross beam 3 along the left and right and up and down directions of the whole vehicle. This embodiment can be in the event of a side collision of the vehicle. When the collision force is transmitted along the seat cross beam 3, in addition to the horizontal force, there will also be a vertical upward component, and the vertical component will make the seat cross beam 3 squeeze and deform upward, guiding the seat cross beam 3 to deform upward, which can avoid the seat cross beam 3 from squeezing the front floor structure downward after deformation, occupying the battery pack space and causing battery pack damage, thereby achieving the effect of improving the safety of the battery pack when the vehicle collides sideways.

[0053] Based on the above overall introduction, specifically, it should be pointed out that when the front seat cross beam 301 adopts the seat cross beam 3 with one end obliquely upwardly arranged in this embodiment, the rear seat cross beam 302 can, for example, adopt a traditional straight beam structure to also achieve the installation of the rear part of the seat. Of course, in addition to being a traditional straight beam, the rear seat cross beam 302 can also be the seat cross beam 3 with one end obliquely upwardly arranged in this embodiment. When the rear seat cross beam 302 adopts the seat cross beam 3 with one end obliquely upwardly arranged in this embodiment, similarly to the front seat cross beam 301, the front seat cross beam 301 can adopt a traditional straight beam, and of course, the seat cross beam 3 with one end obliquely upwardly arranged in this embodiment can also be adopted at the same time.

[0054] In this embodiment, as a preferred implementation form, the seat crossbeam 3 connected to the threshold beam 1 at one end is obliquely arranged upward, and the seat crossbeam 3 can generally be arranged to be arched upward as a whole, and in specific implementation, it can be, for example, Figures 1 to 3 As shown in the figure, the front seat cross beam 301 and the rear seat cross beam 302 are both integrally formed into an arc-shaped structure that gradually arches upward from the left and right ends to the middle in the left and right directions of the vehicle, and the curvature of the front seat cross beam 301 and the rear seat cross beam 302 are different.

[0055] In this way, by making each seat cross beam 3 an arc-shaped structure that gradually arches upward from the left and right ends to the middle, it can be understood that it can not only decompose the collision force upward when the vehicle collides sideways, but also enable the collision force to be better transmitted laterally along each seat cross beam 3 to ensure the transmission and dispersion effect of the collision force. At the same time, since the seat cross beam 3 is arc-shaped, it can obviously also utilize the high strength of the arc-shaped structure to ensure the structural strength of each seat cross beam 3 itself, which helps to increase the overall stiffness of the front floor.

[0056] In this embodiment, during specific preparation, the above-mentioned seat crossbeams 3 can be, for example, roll-formed. When using the roll-forming method, the cross-section of each seat crossbeam 3 can be a closed cross-section that is closed all around, or it can also be an open cross-section with at least one side open. At this time, making each seat crossbeam 3 roll-formed and making the cross-section of each seat crossbeam 3 a closed cross-section or an open cross-section with a side opening can facilitate the preparation of each seat crossbeam 3 and also ensure its structural strength.

[0057] Among them, for the above-mentioned closed cross-section formed by roll-forming, its shape can include but is not limited to the shape of a Chinese character 'Ri' (日) or a Chinese character 'Mu' (目). The shape of the above-mentioned open cross-section can include but is not limited to the shape of an 'M' or an 'Ω', etc.

[0058] In this embodiment, in addition to using the roll-forming method, as other preferred implementation forms, for example, each seat crossbeam 3 can also be stamping-formed, or each seat crossbeam 3 can also use extruded profiles. At this time, making each seat crossbeam 3 stamping-formed or making each seat crossbeam 3 use extruded profiles can also facilitate the preparation of each seat crossbeam 3 and help ensure the structural strength of each seat crossbeam 3.

[0059] When each seat crossbeam 3 is stamping-formed, as a feasible example, the cross-sectional shape of each seat crossbeam 3 can include but is not limited to the shape of an 'M' or an 'Ω', etc. When each seat crossbeam 3 uses extruded profiles, similar to the above-mentioned roll-forming process, the cross-section of each seat crossbeam 3 can also be a closed cross-section or an open cross-section with a side opening. At the same time, in addition to the shape of a Chinese character 'Ri' (日) or a Chinese character 'Mu' (目) for the closed cross-section, of course, it can also be the shape of a Chinese character 'Tian' (田) and other shapes with multiple closed cavities. The shape of the open cross-section can also be the shape of an 'M' or an 'Ω', etc.

[0060] It should be noted that when each seat crossbeam 3 adopts Figure 7 the structural form shown in [reference], it generally can use extruded profiles or can also be stamping-formed to facilitate the preparation of each seat crossbeam 3. However, for each seat crossbeam 3 in this embodiment, in addition to using extruded profiles, or using stamping-formed, and the roll-forming method mentioned above, of course, it is also feasible to use other methods such as sheet metal welding for forming, as long as the overall structure of the prepared seat crossbeams 3 meets the requirement of arching upward as a whole and can decompose the vehicle side impact force upward.

[0061] In this embodiment, each seat cross beam 3 can be an integral beam structure formed in one piece, so that each seat cross beam 3 is an integral beam formed in one piece, and the advantages of the integral molding process can be utilized, which is beneficial to the preparation of each seat cross beam 3, reduces its preparation cost, and also helps to ensure the overall structural strength of each seat cross beam 3. In specific implementation, the seat cross beam 3 with an integral beam structure can usually be formed by roll forming or stamping, or adopt an extruded profile.

[0062] In addition to the integral beam structure that can be formed in one piece, of course, in other implementation forms, each seat cross beam 3 of this embodiment can also be a split beam structure composed of multiple split structures connected together. In this case, each seat cross beam 3 is a split beam composed of multiple split structures connected together. Compared with the integral beam structure, it is easy to control the structural shape of each seat cross beam 3, which is conducive to matching each seat cross beam 3 with surrounding components in the vehicle body, and can facilitate the arrangement of each seat cross beam 3 in the vehicle body.

[0063] In specific implementation, the multiple split structures constituting the seat cross beam 3 can be, for example, a beam body formed by rolling, stamping or sheet metal welding. Of course, the beam body can also be an extruded profile. The multiple beam bodies can be connected together by direct or indirect connection to form the seat cross beam 3 as a split beam structure. The direct connection means that different beam bodies are directly connected, and the indirect connection means that different beam bodies are connected through structures such as connecting plates and connecting brackets, and the specific connection method can be screw connection, riveting, etc.

[0064] For example, the seat crossbeam 3 and the door sill beams 1 on both sides are made of extruded aluminum. Fig. 9 As shown, in the specific implementation, this embodiment can, for example, make the seat cross beam 3 and the sill beams 1 on each side plugged together by plugging together through the plug-in structure. In this way, the seat cross beam 3 and the sill beams 1 on both sides are made of extruded aluminum, and the seat cross beam 3 and the sill beam 1 are plugged together by the plug-in structure, which can facilitate the connection between the seat cross beam 3 and the sill beam 1 on the basis of facilitating the preparation of the seat cross beam 3 and the sill beam 1 and ensuring their structural strength, and can ensure the reliability of the connection between them.

[0065] As for the plug-in structure between the seat cross beam 3 and the door sill beam 1, as an exemplary embodiment, it may include a plug-in groove 1a provided on the door sill beam 1, and the end of the seat cross beam 3 is plugged into the plug-in groove 1a. At the same time, preferably, after the seat cross beam 3 and the door sill beam 1 are plugged, they can also be fixed together by welding, screwing or riveting.

[0066] Still by Figure 1 , Figure 2 , and combined with Figures 3 to 5As shown, in this embodiment, a front floor panel 2 is also connected between the two side sill beams 1, and the front floor panel 2 is also divided by the rear seat cross beam 302 into a front panel 201 located in front of the rear seat cross beam 302, and a rear panel 202 located in the rear of the rear seat cross beam 302. At the same time, an upwardly bulging middle channel 2011 is provided on the front panel 201, and the front seat cross beam 301 spans above the middle channel 2011 and is connected to the top of the middle channel 2011. In this embodiment, the curvature of the front seat cross beam 301 is smaller than that of the rear seat cross beam 302.

[0067] On the basis that the rear seat cross beam 302 separates the front floor panel 2 into the front and rear panels, as a preferred implementation form, this embodiment also makes the rear end of the front panel 201 and the front end of the rear panel 202 both connected to the rear seat cross beam 302, and from the front and rear direction of the entire vehicle, the rear end of the front panel 201 and the front end of the rear panel 202 are both arranged to be arched upward following the rear seat cross beam 302.

[0068] In this way, by making the rear end of the front panel 201 and the front end of the rear panel 202 arch upward along the rear seat cross beam 302, when the vehicle collides sideways, the rear end of the front panel 201 and the front end of the rear panel 202 can decompose and transmit the collision force together, thereby improving the decomposition and transmission effect of the rear seat cross beam 302 on the collision force.

[0069] In a specific implementation, the rear end of the front panel 201 and the front end of the rear panel 202 can be stamped, for example, to be arched upward like the rear seat cross beam 302. At the same time, the front panel 201 and the rear seat cross beam 302, as well as the rear panel 202 and the rear seat cross beam 302, can be connected by welding, which not only facilitates the connection operation therebetween, but also ensures the reliability of the connection.

[0070] It is worth noting that, in addition to making the rear end of the front panel 201 and the front end of the rear panel 202 follow the arching of the rear seat cross beam 302, in the specific implementation, of course, it is also possible to make the rear end of the front panel 201 or the front end of the rear panel 202, that is, one of the two, follow the arching of the rear seat cross beam 302. In addition, when only one of the two follows the arching of the rear seat cross beam 302, the end of the other panel can be designed with an upturned flange structure to connect with the rear seat cross beam 302.

[0071] In this embodiment, Figures 1 to 5As shown, a middle channel 2011 bulging upward in the up-down direction of the vehicle is provided on the front panel 201 in the front floor panel 2, and the front seat cross beam 301 spans above the middle channel 2011, and on this basis, preferably, the bottom of the front seat cross beam 301 can be connected to the middle channel 2011, and a seat front mounting bracket 8 can be provided on the front seat cross beam 301.

[0072] At this time, the bottom of the front seat cross beam 301 and the middle channel 2011 can be connected together by spot welding or laser welding, or the two can be connected together by screwing. In particular, the bottom of the front seat cross beam 301 and the middle channel 2011 can be connected, and the top surface of the middle channel 2011 can also match the bottom shape of the front seat cross beam 301, so that the two have a better connection effect.

[0073] In addition, by making the front seat cross beam 301 span above the middle channel 2011 and connected to the middle channel 2011, it can be understood that the vertical support of the front seat cross beam 301 through the middle channel 2011 can enhance the vertical support capacity of the front seat cross beam 301 and ensure the reliability of the installation of the front part of the seat. At the same time, it can also transfer and disperse the collision force on the front seat cross beam 301 to the middle channel 2011, which helps to increase the dispersion effect of the collision force of the opposite side collision.

[0074] Combination Figures 6 to 8 As shown in , in this embodiment, the front seat mounting bracket 8 disposed on the front seat cross beam 301 can generally be a stamped sheet metal structure, and can be stamped into a box-shaped structure, and can be surrounded by the front seat cross beam 301 to form a cavity. In this way, by utilizing the box-shaped structure of the front seat mounting bracket 8 itself, and then cooperating with the front seat cross beam 301 to form a cavity, the front seat mounting bracket 8 can have a good structural strength, thereby improving the rigidity of the front seat mounting point and ensuring the reliability of the seat installation.

[0075] It is worth noting that, in addition to making the above-mentioned front seat mounting bracket 8 adopt a stamped box-shaped structure, of course, in the specific implementation, the front seat mounting bracket 8 can also adopt a bracket structure such as roll forming, or a bracket structure made of extruded profiles. Moreover, it should be pointed out that according to the installation requirements of the seat, the front seat mounting bracket 8 located on the front seat cross beam 301 is usually arranged in multiple intervals. These multiple front seat mounting brackets 8 can adopt the same structure and have the same height, or the multiple front seat mounting brackets 8 can be slightly different in structure and have different heights, which can be designed according to the specific installation requirements of the seat.

[0076] In this embodiment, continue as Figure 1 , Figure 2 and Figure 8 As shown, unlike the front seat cross beam 301, the rear seat cross beam 302 is located behind the middle channel 2011 in the front-to-rear direction of the vehicle, and the rear seat cross beam 302 is also connected to the rear end of the middle channel 2011. In addition, as a preferred implementation form, from the perspective of the upper and lower directions of the vehicle, the rear seat cross beam 302 of this embodiment is also arranged close to the front sides of the left and right B-pillars 4.

[0077] At this time, the rear seat cross beam 302 is located behind the central channel 2011 and connected to the rear end of the central channel 2011. The central channel 2011 can also be used to increase the structural strength and vertical supporting capacity of the rear seat cross beam 302, and the collision force on the rear seat cross beam 302 can be transmitted and dispersed to the central channel 2011 to increase the dispersion effect of the side collision force.

[0078] By arranging the rear seat cross beam 302 close to the front sides of the B-pillars 4 on both sides, it can be understood that it can avoid the impact on the foot space of the rear passengers caused by the arched rear seat cross beam 302, which makes the front floor under the front seats higher and the gap between the front seats is reduced, so as to ensure the riding comfort of the rear passengers.

[0079] On the basis that the rear seat cross beam 302 is arranged near the front sides of the B pillars 4 on both sides, this embodiment continues to refer to Figure 1 , Figure 6 and Figure 8 As shown, since the rear seat cross beam 302 is arranged near the front side of the B-pillars 4 on both sides, that is, in the front-rear direction of the whole vehicle, the rear seat cross beam 302 is moved forward compared with the traditional arrangement position. At this time, in order to ensure that when the vehicle is hit sideways, the collision force at the B-pillar 4, which is the main load-bearing position of the side collision, can be fully transmitted to the inner rear seat cross beam 302, as a preferred implementation form, this embodiment sets an end reinforcement bracket 7 between the rear seat cross beam 302 and each side sill beam 1.

[0080] The end reinforcement brackets 7 on each side are located at the rear side of the rear seat cross beam 302 so as to be arranged opposite to the B-pillar 4 in the left-right direction of the vehicle, and the end reinforcement brackets 7 on each side can be, for example, conventional stamped sheet metal structures, and connected to the door sill beam 1 and the rear seat cross beam 302 by welding. At the same time, when the sheet metal structure is adopted, the end reinforcement brackets 7 on each side can also be overlapped on the door sill beam 1 and the rear seat cross beam 302 to form a cavity with the door sill beam 1, the rear seat cross beam 302 and the front floor panel 2. At this time, by forming a cavity structure, the structural strength of the end reinforcement brackets 7 can be ensured by utilizing the high strength of the cavity structure, and thus can have better collision force transmission capability, so that the collision force from the B-pillar 4 position is fully transmitted to the rear seat cross beam 302.

[0081] It should be noted that when the above-mentioned end reinforcement bracket 7 is provided, and in order to achieve reliable installation of the rear part of the seat, in specific implementation, the present embodiment is also provided with a first seat rear mounting bracket 10 on each side end reinforcement bracket 7. At the same time, as a preferred implementation form, the present embodiment is also provided with a second seat rear mounting bracket 9 on the rear side of the rear seat cross beam 302, so that the installation of the rear part of the seat can be achieved through the cooperation of the above-mentioned first seat rear mounting bracket 10 and the second seat rear mounting bracket 9.

[0082] The second seat rear mounting bracket 9 is located between the end reinforcement brackets 7 on both sides, and its front portion is connected to the rear seat cross beam 302, and its bottom portion is connected to the rear panel 202 in the front floor panel 2. At the same time, the second seat rear mounting bracket 9 can generally be arranged in multiple intervals to cooperate with the first seat rear mounting brackets 10 on both sides to install the rear of the seat.

[0083] It can be understood that by arranging the second seat rear mounting bracket 9 on the rear side of the rear seat beam 302 and arranging the first seat rear mounting bracket 10 on the end reinforcement bracket 7, the present embodiment can realize the seat installation function at the position of the rear seat beam 302 on the basis of the arch setting on the seat beam 3 and the rear seat beam 302 being set close to the front side of the B-pillar 4, and the above-mentioned second seat rear mounting bracket 9 and the first seat rear mounting bracket 10 are located on the rear side of the rear seat beam 302. Compared with setting the seat rear mounting bracket on the rear seat beam 302 like the seat front mounting bracket 8, it is obvious that it can also avoid causing the position of the seat rear mounting point to be too high, affecting the installation arrangement of the seat.

[0084] In this embodiment, in the specific implementation, the second seat rear mounting bracket 9 and the first seat rear mounting bracket 10 are usually stamped sheet metal parts, and the above-mentioned seat rear mounting bracket structures can also be set as a box-shaped structure, and are welded and connected with surrounding parts. It can be understood that by making the first seat rear mounting bracket 10 on each side adopt a box-shaped structure, the first seat rear mounting bracket 10 can have a better structural strength, which helps to ensure the rigidity of the seat mounting point and ensure the stability of the seat installation.

[0085] By making the second seat rear mounting bracket 9 also adopt a box-type structure, and the front part of the second seat rear mounting bracket 9 is connected to the rear seat cross beam 302, and the bottom is connected to the rear panel 202, it is obvious that this embodiment can also form a cavity between the second seat rear mounting bracket 9, the seat rear cross beam 302 and the front floor panel 2. In this way, it can also make the second seat rear mounting bracket 9 have a better overall structural strength, which helps to ensure the rigidity of the seat rear mounting point and also achieve the effect of ensuring the stability of the seat installation.

[0086] It is worth noting that in this embodiment, based on the second seat rear mounting bracket 9 being arranged at the rear side of the rear seat cross beam 302, in specific implementation, preferably, the top of the second seat rear mounting bracket 9, of course including the top of the first seat rear mounting bracket 10, should generally be arranged higher than the rear seat cross beam 302. In this way, the installation of the rear part of the seat can be easily realized without being affected by the upward arch of the rear seat cross beam 302.

[0087] In addition, in this embodiment, in order to facilitate the installation operation of the seat, during the specific implementation, the seat mounting structures such as the above-mentioned front seat mounting bracket 8, the second seat rear mounting bracket 9 and the first seat rear mounting bracket 10 can be provided with screw-connecting components such as projection welding nuts or projection welding bolts, so that the seat can be fixedly arranged in the vehicle body by screwing.

[0088] In this embodiment, combined with Fig.10 As shown in , from the front-rear direction of the vehicle, the angle α between the tangent line L at each end of each seat cross beam 3 and the left-right direction of the vehicle can generally satisfy: 6°≤α≤15°, and in specific implementation, the above angle α can be, for example, 6°, 8°, 10°, 12° or 15°. At the same time, it is worth noting that the lower limit of the angle α is controlled at ≥6°, which can ensure the effect of the seat cross beam 3 on the decomposition of the collision force when the vehicle hits the side.

[0089] If the angle α is less than 6°, the ratio of the vertical force component to the horizontal force component in the seat cross beam 3 is less than 10%. In this case, the vertical force component is less than 10% of the horizontal force component. The vertical force component is too small to effectively decompose the side impact force and improve the side impact force transmission. Therefore, from the perspective of enabling the vertical force component to effectively decompose the side impact force, the angle α should be greater than 6°.

[0090] For the upper limit of the angle α, if the angle α exceeds 15°, the ratio of the magnitude of the up-down force component to the magnitude of the left-right force component is greater than 25%, and the up-down force component will be too large, which will cause a large upward deformation of the seat beam 3, and easily cause the structural instability of the seat beam 3, and the risk of the end of the seat beam 3 being detached. Moreover, in extreme cases, if the magnitude of the up-down force component is the same as the left-right force component, in the event of a side collision, it will not be possible to effectively control the deformation of the seat beam 3 in the up-down direction or in the left-right direction. Therefore, in order to ensure the stability of the seat beam 3 during a collision, it should be designed so that the up-down force component is less than the left-right force component. At the same time, considering the need to reserve a safety margin, the corresponding upper limit of the angle α can generally be 15°.

[0091] In this embodiment, the radius R of each seat cross beam 3 in the figure satisfies: 1.5 vehicle width ≤ R ≤ 3.5 vehicle width. It is worth noting that the vehicle width is perpendicular to the longitudinal symmetry plane of the vehicle and the distance between the planes that respectively abut against the outermost rigid fixed protruding parts on both sides of the vehicle (except for the rearview mirror, side marker lights, position lights, turn signal lights, etc.). In the specific implementation, based on the fact that the radius R of the seat cross beam 3 satisfies: 1.5 vehicle width ≤ R ≤ 3.5 vehicle width, that is, the radius R of the seat cross beam 3 is between 1.5 vehicle width and 3.5 vehicle width. Specifically, the radius R of the seat cross beam 3 can be, for example, 1.5 times, 2 times, 2.5 times, 3 times or 3.5 times the vehicle width.

[0092] Continue as Figure 1 , Figure 2 and Figure 7 As shown, in this embodiment, a front floor upper longitudinal beam 11 is also provided above the front panel 201 in the front floor panel 2, and the front floor upper longitudinal beam 11 is provided on the left and right sides of the central channel 2011 respectively.

[0093] Among them, the upper longitudinal beams 11 on the front floor on both sides extend along the front and rear directions of the whole vehicle, and the front end of the upper longitudinal beam 11 on each side extends in front of the front floor panel 2, and the rear end of the upper longitudinal beam 11 on each side of the front floor passes through the avoidance space Q formed between the front seat cross beam 301 and the front floor panel 2, and extends to connect with the rear seat cross beam 302.

[0094] It can be understood that, by allowing the longitudinal beam 11 on the front floor to extend rearward through the avoidance space Q under the front seat cross beam 301 to connect with the rear seat cross beam 302, the present embodiment can also transmit the head-on collision force to the rear seat cross beam 302 behind the front seat cross beam 301 when the vehicle collides head-on with the longitudinal beam 11 on the front floor, thereby extending the force transmission path, allowing the collision force to be fully transmitted and dispersed, thereby achieving the effect of improving the collision safety of the entire vehicle.

[0095] In specific implementation, the upper longitudinal beams 11 on the front floor on each side can be conventional stamped sheet metal beams. At the same time, the front floor longitudinal beams 11 can generally be connected to the front floor panel 2 by welding, and preferably, after being connected to the front floor panel 2, a cavity extending along the front and rear direction of the vehicle can be formed between the front floor panel 2. In this way, the structural strength of the front floor longitudinal beams 11 can be ensured by utilizing the high strength of the cavity structure, thereby improving the structural reinforcement effect.

[0096] In this embodiment, based on the connection between each seat cross beam 3 and the threshold beams 1 on both sides, it is worth noting that, in the specific implementation, each seat cross beam 3 and the threshold beams 1 on both sides can be directly connected, for example. In this way, the direct connection between each seat cross beam 3 and the threshold beam 1 can reduce the number of body parts and help reduce the weight of the body. However, in addition to direct connection, of course, in the specific implementation, each seat cross beam 3 and the threshold beams 1 on both sides can be transitionally connected through a connecting bracket. In addition, when each seat cross beam 3 is connected to the threshold beam 1 through a connecting bracket, compared with direct connection, it can also reduce the difficulty of connection between them, and can facilitate the connection operation between them.

[0097] For the direct connection between each seat cross beam 3 and the threshold beam 1, the ends of each seat cross beam 3 are usually butted against the threshold beam 1 and then connected together by welding. For the transition connection through the connecting bracket, refer to Figure 6 , Figure 8 As shown in , for example, the front seat cross beam 301 can be connected to the door sill beam 1 through the first connecting bracket 5, and the rear seat cross beam 302 can be connected to the door sill beam 1 through the second connecting bracket 6.

[0098] The first connecting bracket 5 and the second connecting bracket 6 can also be stamped sheet metal parts, and in specific implementation, the first connecting bracket 5 or the second connecting bracket 6 can be fixedly connected together by welding after overlapping the seat cross beam 3 between the door sill beam 1.

[0099] In this embodiment, as a preferred implementation form, the connection between each seat cross beam 3 and the door sill beam 1 is still aimed at, such as Fig.12As shown, for the front seat cross beam 301, for example, when viewed from the left and right directions of the entire vehicle, the end cross section of the front seat cross beam 301 has a first portion n corresponding to the side of the door sill beam 1, and a second portion m corresponding to the top of the door sill beam 1, and the cross-sectional size of the first portion n is also greater than the cross-sectional size of the second portion m.

[0100] In this way, by making the cross-sectional size of the first part n corresponding to the side of the sill beam 1 in the end section of the front seat cross beam 301 larger than the cross-sectional size of the second part m corresponding to the top of the sill beam 1, it can be understood that when the vehicle has a side collision, it can avoid the sill beam 1 and the end of the front seat cross beam 301 from being disengaged due to relative displacement during the inward movement of the sill beam 1, resulting in the front seat cross beam 301 being unable to participate in the collision force transmission, affecting the collision safety of the entire vehicle.

[0101] Among them, in the end section of the above-mentioned front seat cross beam 301, the cross-sectional size of the first part n corresponding to the side of the door sill beam 1, and the cross-sectional size of the second part m corresponding to the top of the door sill beam 1, the relative proportion between the two can be set according to the overall curvature setting of the front seat cross beam 301, the arrangement height of the front seat cross beam 301 on the front floor, and the size of the overall cross section of the end of the front seat cross beam 301.

[0102] Generally speaking, it is sufficient to make the cross-sectional size of the first part n corresponding to the side of the sill beam 1 larger than the cross-sectional size of the second part m corresponding to the top of the sill beam 1, and to make the cross-sectional size of the first part n corresponding to the side of the sill beam 1 as large as possible.

[0103] Continue as Fig.13 As shown, for the rear seat cross beam 302, unlike the front seat cross beam 301, in this embodiment, for example, the entire end of the rear seat cross beam 302 can be arranged corresponding to the side of the door sill beam 1. At this time, the entire end of the rear seat cross beam 302 is arranged corresponding to the side of the door sill beam 1. Obviously, when the vehicle hits the side, the collision force at the door sill beam 1 can be better transmitted to the rear seat cross beam 302, and the second seat cross beam 3 can be fully utilized to transmit and eliminate the collision force, which is conducive to improving the safety of the side collision.

[0104] Of course, in addition to making the end cross-section of the front seat beam 301 include two parts respectively arranged corresponding to the side and top of the door sill beam 1, and making the end of the rear seat beam 302 correspond to the side setting of the door sill beam 1 as a whole, in the specific implementation, it is also possible to make each seat beam 3 on the front floor adopt the same setting form as the above-mentioned front seat beam 301, or make each seat beam 3 on the front floor adopt the same setting form as the above-mentioned rear seat beam 302.

[0105] The vehicle body front floor assembly of the present embodiment is arranged so that each seat cross beam 3 is arched upward as a whole. When the vehicle has a side collision, when the collision force is transmitted along each seat cross beam 3, in addition to the horizontal force, there will also be a vertical component of force, and the vertical component of force will guide the seat cross beam 3 to deform upward, so as to prevent the seat cross beam 3 from squeezing the front floor structure downward and invading downward after being deformed, thereby occupying the battery pack space and causing damage to the battery pack. This helps to reduce the collision impact on the battery pack, reduce the risk of battery pack fire, and is beneficial to improving the collision safety of the entire vehicle.

[0106] Embodiment 2

[0107] The present embodiment relates to a vehicle, which is a new energy vehicle having a battery pack disposed at the front floor, and the vehicle body front floor assembly in the first embodiment is disposed in the vehicle of the present embodiment.

[0108] The vehicle of this embodiment is provided with the front floor assembly of the vehicle body in the first embodiment. When the vehicle is hit from the side, it can prevent the seat cross beams 3 from deforming and squeezing the front floor structure downward, occupying the battery pack space and causing damage to the battery pack. This helps to reduce the collision impact on the battery pack, reduce the risk of battery pack fire, and is beneficial to improving the collision safety of the entire vehicle.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle body front floor assembly, characterized in that: It comprises a threshold beam (1) arranged on the left and right sides, and a seat cross beam (3) connected between the threshold beams (1) on the two sides; The seat cross beam (3) comprises a front seat cross beam (301) and a rear seat cross beam (302) which are arranged in a front-to-rear spacing manner, wherein the end of at least one seat cross beam (3) is arranged obliquely upward on one side connected to the door sill beam (1), and when the door sill beam (1) on each side is subjected to a collision force from the side of the vehicle, the collision force from the door sill beam (1) can be decomposed and transmitted on the seat cross beam (3) in two directions, the left-right direction of the vehicle and the up-down direction of the vehicle.

2. The vehicle body front floor assembly according to claim 1, characterized in that: The front seat cross beam (301) and the rear seat cross beam (302) are both integrally arc-shaped structures that gradually arch upward from the left and right ends to the middle in the left and right directions of the vehicle, and the front seat cross beam (301) and the rear seat cross beam (302) have different curvatures.

3. The vehicle body front floor assembly according to claim 2, characterized in that: Each of the seat cross beams (3) is transitionally connected to the threshold beams (1) on each side via a connecting bracket, and each of the seat cross beams (3) is roll-formed or stamped; and / or, Each of the seat cross beams (3) and the door sill beams (1) on both sides are made of extruded aluminum, and the seat cross beams (3) and the door sill beams (1) on each side are fixedly connected together after being plugged in through a plug-in structure.

4. The vehicle body front floor assembly according to claim 2, characterized in that: From the front-rear direction of the vehicle, the angle α between the tangent line L at each end of each seat cross beam (3) and the left-right direction of the vehicle satisfies: 6°≤α≤15°; and / or, The radius R of each seat cross beam (3) satisfies the following: 1.5 vehicle width ≤ R ≤ 3.5 vehicle width.

5. The vehicle body front floor assembly according to claim 2, characterized in that: It also includes a front floor panel (2) connected between the door sill beams (1) on both sides, and the front floor panel (2) is divided by the rear seat cross beam (302) into a front panel (201) located in front of the rear seat cross beam (302), and a rear panel (202) located in the rear of the rear seat cross beam (302); The front panel (201) is provided with a middle channel (2011) that bulges upwards, the front seat crossbeam (301) spans over the middle channel (2011) and is connected to the top of the middle channel (2011), and the curvature of the front seat crossbeam (301) is smaller than the curvature of the rear seat crossbeam (302).

6. The vehicle body front floor assembly according to claim 5, characterized in that: The rear end of the middle channel (2011) is connected to the rear seat cross beam (302); and / or, The rear end of the front panel (201) and the front end of the rear panel (202) are both connected to the rear seat cross beam (302), and when viewed from the front-to-back direction of the vehicle, at least the rear end of the front panel (201) and the front end of the rear panel (202) are arranged to be arched upwards in accordance with the rear seat cross beam (302).

7. The vehicle body front floor assembly according to claim 5, characterized in that: It also includes a front floor upper longitudinal beam (11) arranged above the front floor panel (2), and the front floor upper longitudinal beam (11) is respectively arranged on the left and right sides of the middle channel (2011); The front floor upper longitudinal beams (11) on both sides extend in the front-to-back direction of the vehicle, and the front end of the front floor upper longitudinal beams (11) on each side extends forward of the front floor panel (2), and the rear end of the front floor upper longitudinal beams (11) on each side passes through the avoidance space (Q) formed between the front seat cross beam (301) and the front floor panel (2), and extends to connect with the rear seat cross beam (302).

8. The vehicle body front floor assembly according to claim 2, characterized in that: When viewed from the upper and lower directions of the vehicle, the rear seat cross beam (302) is arranged close to the front sides of the B pillars (4) on the left and right sides; End reinforcement brackets (7) are respectively provided between the rear seat cross beam (302) and the door sill beams (1) on both sides, and the end reinforcement brackets (7) on both sides are located at the rear side of the rear seat cross beam (302).

9. The vehicle body front floor assembly according to any one of claims 2 to 8, characterized in that: When viewed from the left and right direction of the vehicle, the end section of the front seat cross beam (301) comprises a first portion (n) arranged corresponding to the side of the door sill beam (1), and a second portion (m) arranged corresponding to the top of the door sill beam (1), and the cross-sectional dimension of the first portion (n) is greater than the cross-sectional dimension of the second portion (m); and / or, The entire end of the rear seat cross beam (302) is arranged corresponding to the side of the door sill beam (1).

10. A vehicle, characterized in that: The vehicle is provided with the vehicle body front floor assembly according to any one of claims 1 to 9.

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