Lower body main body of vehicle, lower body assembly of vehicle and vehicle

Abstract

The application relates to the technical field of vehicles, and discloses a lower vehicle body main body, a lower vehicle body assembly and a vehicle. The lower vehicle body main body comprises a bottom plate and two seat cross beams. The two seat cross beams are fixed to one side surface of the bottom plate and are arranged in parallel and at intervals along the length direction of the vehicle. At least one of the seat cross beams comprises a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib are connected to each other in an intersecting mode. The lower vehicle body main body, the lower vehicle body assembly and the vehicle provided by the application have high structural strength and ensure the safety of people inside the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a lower vehicle body main body and a vehicle. BACKGROUND

[0002] With the increasing severity of energy consumption and environmental problems, electric vehicles are one of the inevitable trends of automobile development. For electric vehicles, the driving range is one of the key factors for its popularization and popularization, and the lightweight design helps to improve the driving range of electric vehicles, and also helps the control stability and energy utilization rate.

[0003] The current electric vehicle has low structural strength of the lower vehicle body, which is prone to excessive deformation when the vehicle is subjected to a collision, thereby threatening the safety of the passengers and the battery pack. SUMMARY

[0004] Therefore, the present application provides a lower vehicle body main body, a lower vehicle body assembly and a vehicle, which have high structural strength and ensure the safety of the people inside the vehicle.

[0005] Specifically, the present application includes the following technical solutions:

[0006] The first aspect of the present application provides a lower vehicle body main body of a vehicle, which comprises a bottom plate and two seat cross beams;

[0007] The two seat cross beams are fixed to one side surface of the bottom plate and are arranged in parallel and spaced apart along the length direction of the vehicle;

[0008] At least one of the seat cross beams comprises a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib are connected to each other.

[0009] In one implementation manner of the embodiment of the present application, the number of the first reinforcing ribs and the number of the second reinforcing ribs are both multiple, and the first reinforcing ribs and the second reinforcing ribs are respectively inclinedly connected to the two inner surfaces of the seat cross beam opposite in the length direction, and one first reinforcing rib and one second reinforcing rib are connected to form a V-shaped or X-shaped reinforcing rib group.

[0010] In one implementation manner of the embodiment of the present application, the number of the first reinforcing ribs and the number of the second reinforcing ribs are multiple, and the reinforcing rib groups are connected in sequence along the extension direction of the seat cross beam.

[0011] In one implementation manner of the embodiment of the present application, the seat cross beam close to the tail side of the vehicle comprises a cross beam section and at least one reinforcing section;

[0012] The cross beam section extends along the width direction of the vehicle;

[0013] The reinforcing section is connected to the cross beam section in an intersecting manner, and the reinforcing section is located at at least one side edge of the floor panel extending along the length direction.

[0014] In one implementation of the embodiment of the application, the floor panel comprises a front floor panel and two rear longitudinal beams.

[0015] The seat cross beam is fixed to the front floor panel, and the two rear longitudinal beams are respectively located at opposite sides of the front floor panel along the width direction of the vehicle and are connected to the side of the front floor panel close to the tail of the vehicle.

[0016] In one implementation of the embodiment of the application, at least one of the rear longitudinal beams further comprises a third reinforcing rib and a fourth reinforcing rib.

[0017] The third reinforcing rib and the fourth reinforcing rib are respectively connected to the two inner surfaces of the rear longitudinal beam opposite along the height direction of the vehicle in an inclined manner, and the inclined directions of the third reinforcing rib and the fourth reinforcing rib intersect, and one third reinforcing rib is connected to one fourth reinforcing rib to form a reinforcing rib group in a V shape or an X shape.

[0018] In one implementation of the embodiment of the application, one side surface of the third reinforcing rib away from the other rear longitudinal beam is recessed in a direction close to the other rear longitudinal beam to form an arc surface; and / or, one side surface of the fourth reinforcing rib away from the other rear longitudinal beam is recessed in a direction close to the other rear longitudinal beam to form an arc surface.

[0019] In one implementation of the embodiment of the application, the rear longitudinal beam comprises a front section, a connecting section and a rear section.

[0020] The front section is connected to the front floor panel, and the third reinforcing rib and the fourth reinforcing rib are arranged inside the front section.

[0021] The connecting section is connected to the side of the front section away from the front floor panel, and a reinforcing structure is arranged inside the connecting section, and two ends of the reinforcing structure are respectively connected to the two inner surfaces of the connecting section opposite along the width direction.

[0022] The rear section is connected to the side of the connecting section away from the front section.

[0023] In one implementation of the embodiment of the application, the lower vehicle body main body is an integrally formed component.

[0024] The second aspect of the application provides a lower vehicle body assembly, which comprises the above-mentioned lower vehicle body main body and two rocker longitudinal beams.

[0025] The two threshold longitudinal beams are connected to opposite sides of the bottom plate along the width direction and are parallel to the length direction.

[0026] Each of the seat cross beams is connected to or abuts against the adjacent threshold longitudinal beam along opposite sides of the width direction.

[0027] In one implementation of the embodiment, the lower vehicle body assembly further comprises a connecting piece fixed to the top surface of the threshold longitudinal beam, and a first side of the connecting piece is connected to at least one of the seat cross beams, and a second side of the connecting piece is used to connect to the threshold in the vehicle.

[0028] The top surface is a side surface of the threshold longitudinal beam perpendicular to the height direction of the vehicle, and the first side and the second side are respectively adjacent to the top surface.

[0029] The third aspect of the application provides a vehicle comprising the lower vehicle body main body.

[0030] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0031] The lower vehicle body main body, the lower vehicle body assembly and the vehicle provided by the embodiment of the application have the following beneficial effects: the first reinforcing rib and the second reinforcing rib are arranged in at least one seat cross beam to form a reinforcing structure, thereby improving the strength of the seat cross beam; in addition, the first reinforcing rib and the second reinforcing rib are connected to each other at an intersection, thereby improving the strength of the seat cross beam from at least two directions of the intersection, and enabling the first reinforcing rib and the second reinforcing rib to form an integral whole, thereby improving the strength and connection stability compared with a single reinforcing rib structure arranged separately. Therefore, compared with a conventional hollow seat cross beam, the lower vehicle body main body provided by the application can bear greater load and pressure when a side collision occurs, thereby avoiding excessive deformation of the seat cross beam, and avoiding the seat installed on the seat cross beam from intruding forward and backward during the collision, thereby ensuring the safety of passengers and the driver in the vehicle and improving the safety factor of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0033] Figure 1 Fig. 1 shows a structural schematic diagram of a lower vehicle body main body provided by an embodiment of the application;

[0034] Figure 2A top view of a lower vehicle body main body provided by an embodiment of the application is shown.

[0035] Figure 3 A partial view of a lower vehicle body main body provided by an embodiment of the application is shown.

[0036] Figure 4 A structural schematic view of a rear longitudinal beam provided by an embodiment of the application is shown.

[0037] Figure 5 A partial view of a rear longitudinal beam provided by an embodiment of the application is shown.

[0038] Figure 6 A sectional view of a rear longitudinal beam provided by an embodiment of the application is shown.

[0039] Figure 7 A partial view of another lower vehicle body main body provided by an embodiment of the application is shown.

[0040] Explanation:

[0041] 100, rocker longitudinal beam; 1001, reinforcing rib;

[0042] 1, bottom plate; 11, front floor; 12, rear longitudinal beam; 121, front section; 1211, third reinforcing rib; 1212, fourth reinforcing rib; 122, connecting section; 1221, reinforcing structure; 123, rear section; 13, front longitudinal beam; 14, rear suspension connecting piece;

[0043] 2, seat cross beam; 21, first reinforcing rib; 22, second reinforcing rib; 23, coaming; 24, cross beam section; 25, reinforcing section;

[0044] 3, connecting piece; 31, first side surface; 32, second side surface; 33, first connecting plate; 34, second connecting plate;

[0045] 4, front baffle; 5, lower cross beam; 6, front rocker connecting plate.

[0046] Through the above drawings, the specific embodiments of the application have been shown, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the application by any means, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the protection scope of the present application. In order to make the technical solutions and advantages of the present application clearer, the lower body main body of the vehicle, the lower body assembly of the vehicle and the vehicle will be described in detail below with reference to the drawings.

[0048] With the increasing seriousness of energy consumption and environmental problems, electric vehicles are one of the inevitable trends of automobile development. For electric vehicles, the driving range is one of the key factors for popularization and popularization, and lightweight design helps to improve the driving range of electric vehicles, and also helps the handling stability and energy utilization rate.

[0049] In the related art, the seat cross beam under the seat of the electric vehicle is usually a rectangular cross section and a hollow tubular beam. Although the hollow tubular beam is lighter in weight, the structural strength is lower, and when the vehicle is subjected to side impact, excessive deformation is prone to occur, thereby threatening the safety of the passengers and the battery pack.

[0050] To this end, the present application provides a lower body main body, as shown in Figure 1 and Figure 2 The lower body main body includes a bottom plate 1 and two seat cross beams 2. The two seat cross beams 2 are fixed to one side surface of the bottom plate 1 and are arranged in parallel and spaced apart along the length direction of the vehicle. At least one seat cross beam 2 includes a first reinforcing rib 21 and a second reinforcing rib 22, and the first reinforcing rib 21 and the second reinforcing rib 22 are connected to each other at an intersection.

[0051] In the lower body main body provided in the embodiments of the present application, the first reinforcing rib 21 and the second reinforcing rib 22 are arranged in at least one seat cross beam 2 to form a reinforcing structure, thereby improving the strength of the seat cross beam 2. In addition, the first reinforcing rib 21 and the second reinforcing rib 22 are connected to each other at an intersection, thereby improving the strength of the seat cross beam 2 from at least two directions of the intersection, and enabling the first reinforcing rib 21 and the second reinforcing rib 22 to form an integral whole. Compared with a reinforcing rib structure arranged separately in a single piece, the strength and connection stability are higher.

[0052] Therefore, compared with the traditional hollow seat cross beam, the lower body main body provided in the present application can withstand greater load and pressure when a side impact occurs, thereby avoiding excessive deformation of the seat cross beam 2, and avoiding the seat mounted on the seat cross beam 2 from invading forward and backward during the impact process, thereby ensuring the safety of the passengers and the driver in the vehicle and improving the safety factor of the vehicle.

[0053] In some embodiments, the first and second reinforcement bars 21 and 22 are respectively connected to two opposite inner surfaces of the seat cross beam 2 along the length direction of the vehicle, and one first reinforcement bar 21 and one second reinforcement bar 22 are connected to form a V-shaped or X-shaped reinforcement bar group.

[0054] As shown in the examples, Figure 3 The seat cross beam 2 can further include two side plates 23 opposite along the length direction of the vehicle and extending along the width direction of the vehicle. The first and second reinforcement bars 21 and 22 can be arranged between the two side plates 23, and the two ends of the first and second reinforcement bars 21 and 22 can be respectively connected to the opposite inner surfaces of the two side plates 23.

[0055] The seat cross beam 2 can be used to connect with a seat in the vehicle, thereby providing mounting support for the seat. In some embodiments, the height of the side plates 23 can be the same as the height of the first and second reinforcement bars 21 and 22 respectively. The side of each of the side plates 23, the first and second reinforcement bars 21 and 22 away from the floor 1 can be connected with the seat. The side plates 23 provide fixing points for the first and second reinforcement bars 21 and 22 along the length direction of the vehicle, thereby improving the fixing stability of the first and second reinforcement bars 21 and 22. In addition, compared with fixing the seat only by the first and second reinforcement bars 21 and 22, arranging the side plates 23 on both sides of the first and second reinforcement bars 21 and 22 is equivalent to increasing the contact area between the seat cross beam 2 and the seat, thereby improving the connection strength between the seat cross beam 2 and the seat, and avoiding the seat from being separated from the seat cross beam 2 when subjected to force.

[0056] In other embodiments, the seat cross beam 2 can further include a hollow rectangular shell, wherein the above-mentioned side plates 23 serve as two opposite side walls of the hollow shell, and a top wall can be arranged between the two side plates 23, which is opposite to the floor 1. The first and second reinforcement bars 21 and 22 are arranged inside the hollow shell, and the side of the first and second reinforcement bars 21 and 22 away from the floor 1 can be connected with the top wall. In this way, the top wall in the hollow shell provides fixing points for the first and second reinforcement bars 21 and 22 along the height direction of the vehicle, thereby further improving the strength of the seat cross beam 2 and increasing the contact area between the seat cross beam 2 and the seat.

[0057] In some embodiments, the first and second adjacent reinforcing ribs 21 and 22 can be connected end to end to form a V-shaped structure. Exemplarily, the opposite ends of the first reinforcing rib 21 can be connected to the ends of two second reinforcing ribs 22, respectively, and the two second reinforcing ribs 22 extend parallel to each other. The V-shaped reinforcing rib group can divide the space between the two side plates 23 into a plurality of triangular spaces, making the structure more stable and the seat cross beam 2 more stable when subjected to force, thereby helping to improve the load capacity and safety of the seat cross beam 2.

[0058] In other embodiments, the middle part of the first reinforcing rib 21 is connected to the middle part of the second reinforcing rib 22, thereby forming an X-shaped structure. Since the X-shaped structure has cross supports in multiple directions, it can better resist torsion and deformation, effectively enhance the overall rigidity of the seat cross beam 2, and thus improve the stability and safety of the seat; and the X-shaped structure can enable the seat cross beam 2 to uniformly distribute the force when subjected to force, thereby reducing the local stress concentration and helping to improve the fatigue resistance and prolong the service life of the seat cross beam.

[0059] In an implementation manner of the embodiments of the present application, as shown in Figure 3 the number of the first reinforcing ribs 21 and the number of the second reinforcing ribs 22 are both multiple, and the multiple reinforcing rib groups are connected in sequence along the extension direction of the seat cross beam 2.

[0060] The sequential connection of the multiple reinforcing rib groups can form a more complex and stable structure, thereby effectively enhancing the overall structural strength of the seat cross beam 2, so that the seat cross beam 2 can withstand greater load; and by replacing the traditional seat lower cross beam with the multiple reinforcing rib groups, the weight distribution of the entire vehicle can be optimized, so that the seat cross beam 2 can be as light as possible while ensuring sufficient strength, thereby improving the fuel efficiency and power performance of the vehicle.

[0061] When the collision force on the side of the vehicle is large, the seat cross beam 2 may be bent and deformed towards the tail of the vehicle, so as to avoid the seat from invading backward and causing damage to the passengers sitting in the rear compartment of the vehicle. In an implementation manner of the embodiments of the present application, as shown in Figure 3 the seat cross beam near the tail of the vehicle can include a cross beam section 24 and at least one reinforcing section 25; the cross beam section 24 extends along the width direction of the vehicle; the reinforcing section 25 is connected to the cross beam section 24 in intersection, and the reinforcing section 25 is located on at least one side edge of the floor 1 extending along the length direction.

[0062] In the lower body body provided in this application embodiment, a crossbeam segment 24 and a reinforcing segment 25 are provided on the bottom plate 1. The reinforcing segment 25 can guide part of the collision force to other components in the vehicle when the collision force is transmitted to the seat crossbeam 2 and the crossbeam segment 24 in the seat crossbeam 2 has a tendency to deform toward the rear of the vehicle, thereby playing the role of dispersing the collision force.

[0063] In some embodiments, the crossbeam segment 24 and the reinforcing segment 25 are vertically connected, which reduces the probability of twisting or deformation of the connection between the crossbeam segment 24 and the reinforcing segment 25 when subjected to external forces, thereby improving the stability of the entire seat crossbeam 2.

[0064] In some embodiments, the side of the reinforcing section 25 away from the edge near the bottom plate 1 can be flush with the edge of the bottom plate 1, so that when the sill beam 100 is connected to the two sides of the bottom plate 1, the reinforcing section 25 can strengthen the edge portion of the bottom plate 1, thereby improving the connection strength between the sill beam 100 and the bottom plate 1.

[0065] In some embodiments, such as Figure 3 As shown, the reinforcing section 25 also includes a first reinforcing rib 21 and a second reinforcing rib 22 that intersect and connect with each other. A first reinforcing rib 21 and a second reinforcing rib 22 are connected to each other to form a reinforcing rib group. Multiple reinforcing rib groups are connected sequentially along the length of the vehicle. The sequential connection of multiple reinforcing rib groups can form a more complex and stable structure, enabling the reinforcing section to withstand greater loads when under stress.

[0066] In some embodiments, the seat crossbeam 2 may include two reinforcing sections 25 located on opposite sides of the crossbeam section 24 along the width direction of the vehicle, to provide support to both ends of the crossbeam section 24 and further ensure that the seat crossbeam 2 does not deform excessively in the event of a collision. Those skilled in the art can select and adjust the number of reinforcing sections 25 according to actual needs.

[0067] In some embodiments, the seat beam 2 including the reinforcing ribs can be integrally formed with the base plate 1.

[0068] In one implementation of this application, the floor 1 may include a front floor 11 and two rear longitudinal beams 12; the seat crossbeam 2 is fixed to the front floor 11, and the two rear longitudinal beams 12 are located on opposite sides of the front floor 11 along the width direction of the vehicle and are connected to the side of the front floor 11 near the rear of the vehicle.

[0069] In some embodiments, the front floor 11 and the two rear longitudinal beams 12 are integrally formed, eliminating the need for connecting parts between the front floor 11 and the rear longitudinal beams 12. This reduces the weight of the lower body structure.

[0070] The rear side member 12 is one of the important structural components of the vehicle body, which bears the load of the vehicle body and torsional force, and when the vehicle is subjected to rear collision, the collision force needs to be absorbed by the rear side member 12 to ensure the integrity of the rear passenger compartment of the vehicle. Therefore, a reinforcing structure can be provided inside the rear side member 12 to increase the overall structural strength of the rear side member 12.

[0071] In some embodiments, as shown in Figs. 1 and 2, the at least one rear side member 12 can include a third reinforcing rib 1211 and a fourth reinforcing rib 1212; the third reinforcing rib 1211 and the fourth reinforcing rib 1212 are respectively connected to two opposite inner surfaces of the rear side member 12 in the height direction of the vehicle in an inclined manner, and the inclined directions of the third reinforcing rib 1211 and the fourth reinforcing rib 1212 intersect, and one third reinforcing rib 1211 and one fourth reinforcing rib 1212 are connected to form a reinforcing rib group in the shape of V or X. Figure 1 Figure 4 In some embodiments, as shown in Figs. 1 and 2, the at least one rear side member 12 can include a third reinforcing rib 1211 and a fourth reinforcing rib 1212; the third reinforcing rib 1211 and the fourth reinforcing rib 1212 are respectively connected to two opposite inner surfaces of the rear side member 12 in the height direction of the vehicle in an inclined manner, and the inclined directions of the third reinforcing rib 1211 and the fourth reinforcing rib 1212 intersect, and one third reinforcing rib 1211 and one fourth reinforcing rib 1212 are connected to form a reinforcing rib group in the shape of V or X.

[0072] Exemplarily, the reinforcing rib group formed by the third reinforcing rib 1211 and the fourth reinforcing rib 1212 (hereinafter referred to as "second reinforcing rib group") can adopt a similar structure as the reinforcing rib group in the seat cross member 2 (hereinafter referred to as "first reinforcing rib group") described above. The difference is that the first reinforcing rib group in the seat cross member 2 is parallel to the plane in which the floor 1 is located, for example, the orthographic projection of the first reinforcing rib group on the projection plane perpendicular to the height direction of the vehicle is in the shape of V or X; while the second reinforcing rib group in the rear side member 12 is perpendicular to the plane in which the floor 1 is located, for example, the orthographic projection of the second reinforcing rib group on the projection plane perpendicular to the width direction of the vehicle is in the shape of V or X.

[0073] By providing the third reinforcing rib 1211 and the fourth reinforcing rib 1212 intersecting and connecting inside the rear side member 12, the overall structural strength of the rear side member 12 is effectively increased, and this reinforcing structure can provide support when the rear side member 12 is subjected to collision force parallel to the length direction of the vehicle, so as to avoid excessive intrusion of the rear side member into the passenger compartment of the vehicle. In addition, the reinforcing ribs intersecting and connecting with each other can effectively disperse the collision force when the rear side member 12 is subjected to collision, so as to reduce the damage degree of the rear side member 12 and the passenger compartment of the vehicle, to improve the collision safety of the vehicle, and thus protect the safety of the passengers in the vehicle.

[0074] In some embodiments, the rear side member 12 can further include a hollow shell, and the third reinforcing rib 1211 and the fourth reinforcing rib 1212 can be arranged inside the hollow shell. In some embodiments, the third reinforcing rib 1211 and the fourth reinforcing rib 1212 can be integrally formed with the hollow shell of the rear side member 12, so as to save the connecting components between the hollow structure and the shell, thereby reducing the weight of the rear side member 12 under the premise of ensuring the structural strength, so as to reduce the burden on the suspension system and the overall performance of the vehicle. ​

[0075] In some embodiments, the rear longitudinal beam 12 can include a plurality of third reinforcing ribs 1211 and a plurality of fourth reinforcing ribs 1212, and the plurality of reinforcing rib groups are sequentially connected along the length direction of the vehicle, so as to form a more complex and stable structure, thereby effectively enhancing the overall structural strength of the rear longitudinal beam 12, so that the rear longitudinal beam 12 can withstand greater loads.

[0076] In an example, the third reinforcing ribs 1211 and the fourth reinforcing ribs 1212 are connected to each other in an intersecting manner and form an X-shaped structure. Since the X-shaped structure has intersecting supports in multiple directions, it can better resist torsion and deformation, effectively enhance the overall rigidity of the rear longitudinal beam 12, and thereby avoid excessive deformation of the rear longitudinal beam. In addition, the X-shaped structure can enable the rear longitudinal beam 12 to uniformly distribute forces when subjected to stress, thereby reducing the occurrence of local stress concentration, helping to improve its fatigue resistance performance, and prolonging the service life of the rear longitudinal beam 12.

[0077] In another example, the third reinforcing ribs 1211 and the fourth reinforcing ribs 1212 are connected to each other in an intersecting manner and form a V-shaped structure. The plurality of V-shaped reinforcing rib groups are connected to the inner surface of the rear longitudinal beam 12 to divide the internal space of the rear longitudinal beam 12 into a plurality of triangular subspaces, so that the rear longitudinal beam 12 is more stable when subjected to stress.

[0078] In an implementation manner of the embodiment of the present application, as shown in Figure 5 and Figure 6 the third reinforcing rib 1211 is recessed away from the side surface of another rear longitudinal beam 12 to form an arc surface in a direction close to the other rear longitudinal beam 12. Similarly, the fourth reinforcing rib 1212 is recessed away from the side surface of another rear longitudinal beam 12 to form an arc surface in a direction close to the other rear longitudinal beam 12.

[0079] In the lower vehicle body provided by the embodiment of the present application, the side surface of the third reinforcing rib 1211 and / or the fourth reinforcing rib 1212 is in an arc surface. The arc surface, as an effective flow guiding structure, can help control the flow path of the aluminum liquid in the mold when the lower vehicle body is die-cast, such a structure can reduce the turbulence phenomenon of the aluminum liquid flow, making the flow more stable, thereby improving the filling efficiency and quality of the aluminum liquid. In addition, due to the setting of the arc surface, the flow characteristics of the aluminum liquid in the mold are changed, which can reduce the excessive accumulation of heat in the local area and avoid casting defects caused by local overheating. Finally, the design of the arc surface can reduce the resistance in the flow process of the aluminum liquid, so that the aluminum liquid flows more smoothly through the mold, which helps to keep the flow rate and temperature of the aluminum liquid stable, thereby ensuring the manufacturing precision and the surface smoothness of the casting.

[0080] In an implementation manner of the embodiment of the present application, as shown in Figure 4As shown, the rear longitudinal beam comprises a front section 121, a connecting section 122 and a rear section 123; the front section 121 is connected with the front floor 11, and is internally provided with a third reinforcing rib 1211 and a fourth reinforcing rib 1212; the connecting section 122 is connected with the side of the front section 121 away from the front floor 11, and the interior of the connecting section 122 is provided with a reinforcing structure 1221, both ends of the reinforcing structure 1221 being connected to the two opposite inner surfaces of the connecting section 122 along the vehicle width direction; the rear section 123 is connected with the side of the connecting section 122 away from the front section 121.

[0081] In some embodiments, the reinforcing structure 1221 can comprise a fifth reinforcing rib and a sixth reinforcing rib connected with each other, the fifth reinforcing rib and the sixth reinforcing rib being obliquely connected to the two opposite inner surfaces of the connecting section 122 along the width direction, one fifth reinforcing rib being connected with one sixth reinforcing rib to form a reinforcing rib group in V shape or X shape.

[0082] The rear suspension is an important component for supporting the rear wheels of the vehicle, and is closely combined with the rear longitudinal beam 12 through various connection modes to support and transmit force, wherein the rear suspension connecting pieces 14 provided on the connecting section 122 and the front section 121 of the rear longitudinal beam 12 in the embodiments of the present application are all used for connecting with the rear suspension. Therefore, in some embodiments, the fifth reinforcing rib and the sixth reinforcing rib can be provided in the interior of the connecting section 122, and the fifth reinforcing rib and the sixth reinforcing rib are connected with each other to ensure the structural strength at the connecting point of the rear suspension and the rear longitudinal beam 12.

[0083] In some embodiments, one fifth reinforcing rib and one sixth reinforcing rib are connected with each other to form a reinforcing rib group, and a plurality of reinforcing rib groups are connected in sequence along the length direction of the vehicle to further improve the structural strength at the connecting point of the rear suspension and the rear longitudinal beam 12.

[0084] In some embodiments, the rear section 123 of the rear longitudinal beam 12 can be a hollow tubular beam with a rectangular cross section, so as to deform when subjected to a collision and realize energy absorption.

[0085] In one implementation manner of the embodiments of the present application, the lower vehicle body main body is an integrally formed component, which reduces the weight of the vehicle body while improving the rigidity and structural strength of the vehicle body; and the number of vehicle body parts is greatly reduced, which reduces the intermediate links such as automobile production and manufacturing, and reduces the production and manufacturing cost investment and production man-hours.

[0086] Exemplarily, as shown in Figure 1 the front floor 11, the rear longitudinal beam 12 and the seat cross beam 2 in the lower vehicle body main body are integrally formed components.

[0087] Optionally, the lower vehicle body main body is an aluminum alloy component formed by high-pressure vacuum die casting.

[0088] According to the experimental data, the underbody main body provided in the present application can reduce the weight of the vehicle body by about 30% compared with the traditional steel vehicle body, greatly reducing the weight of the vehicle body; and one component is equivalent to the collection of more than 150 stamping parts of the traditional steel vehicle body, greatly reducing the number of parts.

[0089] The second aspect of the present application provides an underbody assembly, which comprises the above-mentioned underbody main body, and two rocker longitudinal beams 100; the two rocker longitudinal beams 100 are respectively connected to the opposite sides of the bottom plate 1 along the width direction and are parallel to the length direction; the seat cross beams 2 are respectively connected to or abut against the rocker longitudinal beams 100 adjacent to the opposite sides of the seat cross beams 2 along the width direction.

[0090] When the vehicle is subjected to a side collision, the collision force will first act on the rocker longitudinal beams 100, and the seat cross beams 2 connected to or abutting against the rocker longitudinal beams 100 can disperse the collision force transmitted to the rocker longitudinal beams 100 to the two seat cross beams 2, avoiding the excessive deformation of the rocker longitudinal beams 100 and the intrusion into the interior of the vehicle.

[0091] In some embodiments, the two ends of the seat cross beams 2 along the width direction of the vehicle are directly connected to the rocker longitudinal beams 100, and when the rocker longitudinal beams 100 are impacted, the collision force will be transmitted to the two seat cross beams 2 respectively, and the seat cross beams 2 have a certain supporting effect on the rocker longitudinal beams 100, which can avoid the excessive deformation of the rocker longitudinal beams 100 and the intrusion into the driver's cabin when the rocker longitudinal beams 100 are impacted.

[0092] In some embodiments, in order to further avoid the deformation of the rocker longitudinal beams 100 and the threat to the life safety of the driver and the passengers, as shown in Figure 2 The inside of the rocker longitudinal beam 100 has a plurality of reinforcing ribs 1001 connected to each other, which can improve the structural strength of the rocker longitudinal beam 100, and thus avoid the excessive deformation of the rocker longitudinal beam 100 and the intrusion into the driver's cabin or the passenger's cabin when the rocker longitudinal beam 100 is impacted.

[0093] Exemplarily, as shown in Figure 3 The inside of the rocker longitudinal beam 100 has a plurality of reinforcing ribs 1001, and the cross section is in a grid shape, which not only increases the structural strength of the rocker longitudinal beam 100, but also helps to control the flow path of the aluminum liquid in the mold, reduce turbulence and eddy, make the filling of the aluminum liquid more uniform, and also help to uniformly distribute the heat in the aluminum liquid, avoiding the temperature of the hot spot area being too high.

[0094] In some embodiments, the rocker longitudinal beam 100 and the bottom plate 1 are connected by bolts and structural glue, and the structural glue can fill the gap between the rocker longitudinal beam 100 and the bottom plate 1, thereby avoiding the chemical corrosion phenomenon of the rocker longitudinal beam 100 and / or the bottom plate 1 in the environment.

[0095] In one implementation of the embodiment of the present application, as shown in Figure 3 The lower vehicle body assembly further comprises a connecting piece 3 fixed to the top surface of the rocker side member 100, and the first side surface 31 of the connecting piece 3 is connected with the at least one seat cross beam 2, and the second side surface 32 is used to be connected with the rocker of the vehicle; wherein the top surface is a side surface of the rocker side member 100 perpendicular to the height direction of the vehicle, and the first side surface 31 and the second side surface 32 are respectively adjacent to the top surface.

[0096] In the lower vehicle body provided by the embodiment of the present application, by arranging the connecting piece 3, a force transmission path is formed among the rocker side member 100, the rocker and the seat cross beam 2, the integrity among the three components is improved, and when any one of the three components is subjected to a collision force, a part of the collision force is dispersed to the other two components, and the structural strength of the connection point between the rocker and the rocker side member 100 is improved.

[0097] In some embodiments, the connecting piece 3 comprises a first connecting plate 33 and a second connecting plate 34 connected vertically, wherein the first connecting plate comprises the first side surface 31 and the second side surface 32 described above, and the first side surface 31 and the second side surface 32 are opposite, and an L-shaped connecting surface formed between the first connecting plate 33 and the second connecting plate 34 is used to be connected with the rocker.

[0098] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 7 The lower vehicle body assembly can further comprise a front apron 4, a lower cross beam 5 and two front longitudinal beams 13, the front apron 4 is connected with the end of the bottom plate 1 away from the rear longitudinal beam 12, the lower cross beam 5 is located on the side of the front apron 4 away from the rear longitudinal beam 12, and the two front longitudinal beams 13 are respectively located on the opposite sides of the bottom plate 1 along the width direction of the vehicle and on the side of the front apron 4 away from the rear longitudinal beam 12, the two front longitudinal beams 13 are parallel to the length direction of the vehicle, and are connected with the front apron 4, when the vehicle is subjected to a front collision, the force is first transmitted to the front longitudinal beam, and then transmitted to the front apron 4 and the lower cross beam 5 through the front longitudinal beam.

[0099] Optionally, the front longitudinal beam 13 and the front apron 4 are riveted; and / or the front longitudinal beam 13 and the front apron 4 are connected through screws.

[0100] In some embodiments, structural glue is filled between the front longitudinal beam 13 and the front apron 4 to fill the gap between the front longitudinal beam 13 and the front apron 4, so as to avoid chemical corrosion of the front longitudinal beam 13 and / or the front apron 4 in the environment.

[0101] In some embodiments, as shown in Figure 1As shown, the front apron 4 can be further provided with a front threshold connecting plate 6 close to one side of the threshold longitudinal beam 100, and the front threshold connecting plate 6 is connected with the front apron 4 and the threshold longitudinal beam 100 respectively, and when the vehicle is subjected to a collision force from the front, the front threshold connecting plate 6 can transmit the collision force to the threshold longitudinal beam 100.

[0102] The application also provides a vehicle, which comprises the lower vehicle body main body.

[0103] In the vehicle provided by the embodiment of the application, the first reinforcing rib 21 and the second reinforcing rib 22 are arranged in the at least one seat transverse beam 2 to form a reinforcing structure, so that the strength of the seat transverse beam 2 is improved; in addition, the first reinforcing rib 21 and the second reinforcing rib 22 are connected with each other at an intersection, so that the strength of the seat transverse beam 2 is improved from at least two directions of the intersection, and the first reinforcing rib 21 and the second reinforcing rib 22 can form an integral whole, and compared with a reinforcing rib structure arranged in a single separate manner, the strength and the connection stability are higher.

[0104] In the present application, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0105] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

[0106] It should be understood that the application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the appended claims.

Claims

1. A lower body of a vehicle, characterized by, The lower vehicle body main body comprises a floor panel (1) and two seat cross beams (2); The two seat cross beams (2) are fixed to one side surface of the floor panel (1) and are arranged in parallel and spaced apart along the length direction of the vehicle; At least one of the seat cross beams (2) comprises a first reinforcing rib (21) and a second reinforcing rib (22), and the first reinforcing rib (21) and the second reinforcing rib (22) are connected to each other at an intersection; The seat cross beam (2) near the tail side of the vehicle comprises a cross beam section (24) extending along the width direction of the vehicle and at least one reinforcing section (25) connected to the cross beam section (24) at an intersection, and the reinforcing section (25) is located at at least one side edge of the floor panel (1) extending along the length direction; The floor panel (1) comprises a front floor panel (11) and two rear longitudinal beams (12), the seat cross beam (2) is fixed to the front floor panel (11), and the two rear longitudinal beams (12) are respectively located on opposite sides of the front floor panel (11) along the width direction of the vehicle and are connected to the front floor panel (11) near one side of the tail of the vehicle; At least one of the rear longitudinal beams (12) comprises a third reinforcing rib (1211) and a fourth reinforcing rib (1212), the third reinforcing rib (1211) and the fourth reinforcing rib (1212) are respectively connected to the two inner surfaces of the rear longitudinal beam (12) opposite in the height direction of the vehicle at an inclination, and the inclination directions of the third reinforcing rib (1211) and the fourth reinforcing rib (1212) intersect, and one third reinforcing rib (1211) and one fourth reinforcing rib (1212) are connected to form a V-shaped or X-shaped reinforcing rib group; The third reinforcing rib (1211) is recessed away from one side surface of another rear longitudinal beam (12) in the direction close to another rear longitudinal beam (12) to form an arc surface, and the fourth reinforcing rib (1212) is recessed away from one side surface of another rear longitudinal beam (12) in the direction close to another rear longitudinal beam (12) to form an arc surface.

2. The lower body shell according to claim 1, characterized in that The first reinforcing rib (21) and the second reinforcing rib (22) are respectively connected to the two inner surfaces of the seat cross beam (2) opposite in the length direction at an inclination, and one first reinforcing rib (21) and one second reinforcing rib (22) are connected to form a V-shaped or X-shaped reinforcing rib group.

3. The lower body shell according to claim 2, characterized in that The number of the first reinforcing ribs (21) and the number of the second reinforcing ribs (22) are respectively multiple, and multiple reinforcing rib groups are connected in sequence along the extension direction of the seat cross beam (2).

4. The lower body shell of claim 1, wherein The rear longitudinal beam (12) comprises a front section (121), a connecting section (122) and a rear section (123); The front section (121) is connected to the front floor panel (11), and the third reinforcing rib (1211) and the fourth reinforcing rib (1212) are arranged inside; The connecting section (122) is connected to the front section (121) away from the front floor (11), and the inside of the connecting section (122) is provided with a reinforcing structure (1221), both ends of the reinforcing structure (1221) being connected to the two opposite inner surfaces of the connecting section (122) along the width direction, respectively. The rear section (123) is connected to the connecting section (122) away from the front section (121).

5. The lower body shell according to any one of claims 1 to 4, characterized in that The lower vehicle body main body is an integrally formed component.

6. A lower body assembly characterized in that, The lower vehicle body assembly comprises the lower vehicle body main body according to any one of claims 1 to 5, and two rocker longitudinal beams (100); The two rocker longitudinal beams (100) are connected to the opposite sides of the bottom plate (1) along the width direction, respectively, and are parallel to the length direction; Each of the seat cross beams (2) is connected to or abuts against the adjacent rocker longitudinal beam (100) on the opposite sides along the width direction, respectively; The lower vehicle body assembly further comprises a connecting piece (3) fixed to the top surface of the rocker longitudinal beam (100), and the first side surface (31) of the connecting piece (3) is connected to at least one of the seat cross beams (2), and the second side surface (32) is used to be connected to the rocker of the vehicle; The top surface is a side surface of the rocker longitudinal beam (100) perpendicular to the height direction of the vehicle, and the first side surface (31) and the second side surface (32) are adjacent to the top surface, respectively.

7. A vehicle characterized by comprising: The vehicle comprises the lower vehicle body main body according to any one of claims 1 to 5.

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