Lower vehicle body combined structure

Abstract

The utility model discloses a lower vehicle body composite structure which comprises a vehicle body floor, a seat cross beam assembly and a threshold beam, and the seat cross beam assembly is arranged above the vehicle body floor in the first direction and fixedly connected with the vehicle body floor; the threshold beam is arranged on one side of the vehicle body floor in the second direction and connected with the vehicle body floor and the seat cross beam assembly. A first cavity penetrating in the second direction is defined in the doorsill beam, a first supporting plate is arranged in the first cavity, and the first supporting plate is horizontally arranged and extends in the second direction so as to divide the first cavity into an upper cavity body and a lower cavity body; wherein the seat cross beam assembly is fixedly connected to the doorsill beam corresponding to the upper cavity, the vehicle body floor abuts against the inner side plate corresponding to the lower cavity, and the set height of the end of the vehicle body floor in the third direction corresponds to the set height of the first supporting plate in the third direction. According to the lower vehicle body combined structure, the side collision acting force can be effectively transmitted while the light weight requirement is met, and the side collision safety performance of the whole vehicle is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle manufacturing, and in particular to a lower vehicle body assembly structure. Background Art

[0002] With the widespread use and popularity of automobiles, the collision safety of vehicles has become the primary reference option for the public when choosing a car. Among them, the lower body structure composed of the door sill beam, seat crossbeam and body floor is one of the important components that determine the side collision safety performance of the entire vehicle. In particular, most pure electric vehicles will install the battery pack related structure on the vehicle chassis, so the importance of the side collision safety performance of the vehicle is even more self-evident.

[0003] In order to reduce the damage to passengers and battery packs during side collisions, various reinforcements are usually added to the lower body structure of existing vehicles to improve its rigidity and avoid large deformation. In this case, the weight of the lower body structure will increase significantly, which is not conducive to the lightweight and endurance of the vehicle. However, reducing the weight of the lower body structure to make the vehicle lightweight and increase its range will reduce its structural strength and affect the side collision safety performance of the vehicle. Therefore, a new lower body composite structure is urgently needed to strike a balance between side collision safety performance and lightweight requirements. Utility Model Content

[0004] In view of the above problems, an embodiment of the present application provides a lower body composite structure, which can effectively transmit the side impact force while meeting the lightweight requirements, thereby improving the side impact safety performance of the entire vehicle.

[0005] According to one aspect of an embodiment of the present application, a lower body assembly structure is provided, including: a vehicle body floor; at least one seat crossbeam assembly, which is arranged above the vehicle body floor along a first direction and fixedly connected to the vehicle body floor; and a sill beam, which is arranged on one side of the vehicle body floor along a second direction and connected to the vehicle body floor and the seat crossbeam assembly; the interior of the sill beam is defined with a first cavity which is arranged to penetrate along the second direction, a first support plate is arranged in the first cavity, the first support plate is arranged horizontally and extends along the second direction, and the two ends of the first support plate located in the first direction are respectively connected to the outer plate and the inner plate on the left and right sides of the first cavity, so as to divide the first cavity into an upper cavity and a lower cavity; wherein the seat crossbeam assembly is fixedly connected to the sill beam corresponding to the upper cavity, the vehicle body floor is abutted against the inner plate corresponding to the lower cavity, and the end of the vehicle body floor for abutting against the inner plate is set at a height in the third direction corresponding to the height of the first support plate in the third direction.

[0006] In an exemplary embodiment of the present application, a first connecting plate and a second connecting plate are provided at one end of the first support plate away from the vehicle body floor, and the first support plate is connected to the outer side plate through the first connecting plate and the second connecting plate; wherein the first connecting plate is arranged to be inclined upward and extend along the second direction, and the second connecting plate is arranged to be inclined downward and extend along the second direction, so as to define a first chamber between the outer side plate, the first connecting plate and the second connecting plate.

[0007] In an exemplary embodiment of the present application, at least one first reinforcing rib is provided in the upper cavity, the first reinforcing rib is vertically arranged and extends along the second direction, and the two ends of the first reinforcing rib in the third direction are respectively connected to the upper side plate on the upper side of the first cavity and the upper plate surface of the first support plate, so as to separate the upper cavity into a second chamber and a third chamber; a second reinforcing rib is provided in the lower cavity, the second reinforcing rib is vertically arranged and extends along the second direction, and the two ends of the second reinforcing rib in the third direction are respectively connected to the lower side plate on the lower side of the first cavity and the lower plate surface of the first support plate, so as to separate the lower cavity into a fourth chamber and a fifth chamber.

[0008] In an exemplary embodiment of the present application, an end of the second reinforcing rib close to the first support plate is connected to an end of the first support plate away from the vehicle body floor.

[0009] In an exemplary embodiment of the present application, a third reinforcement rib is further provided in the fourth chamber, the third reinforcement rib is horizontally arranged and extends along the second direction, and the two ends of the third reinforcement rib located in the first direction are respectively connected to the outer plate and the second reinforcement rib, so as to separate the fourth chamber into a fourth upper chamber and a fourth lower chamber; a fourth reinforcement rib is further provided in the fifth chamber, the fourth reinforcement rib is horizontally arranged and extends along the second direction, and the two ends of the fourth reinforcement rib located in the first direction are respectively connected to the inner plate and the second reinforcement rib, so as to separate the fifth chamber into a fifth upper chamber and a fifth lower chamber; wherein, the setting height of the third reinforcement rib in the third direction is the same as the setting height of the fourth reinforcement rib in the third direction.

[0010] In an exemplary embodiment of the present application, the outer side surface of the inner panel extends along the first direction to form a flange, and the upper side surface of the flange abuts against the lower side of the vehicle body floor.

[0011] In an exemplary embodiment of the present application, the seat crossbeam assembly includes a crossbeam body and a crossbeam connecting member, wherein the crossbeam body is fixedly connected to the vehicle body floor along a first direction, and one end of the crossbeam body abuts against the inner side plate; one end of the crossbeam connecting member is fixedly connected to the end of the crossbeam body, and the other end is bent upward and fixedly connected to the upper side plate of the threshold beam.

[0012] In an exemplary embodiment of the present application, a second cavity extending through the beam body along the first direction is defined inside the beam body, and at least one second support plate is disposed in the second cavity. The second support plate is vertically disposed and extends along the first direction.

[0013] In an exemplary embodiment of the present application, the upper end surface of the beam body is provided with a first concave platform recessed downward along a third direction, and the first concave platform is extended along the first direction; and / or the lower end surface of the beam body is provided with a second concave platform recessed upward along the third direction, and the second concave platform is extended along the first direction.

[0014] In an exemplary embodiment of the present application, the beam body further includes a reinforcing plate, which is extended along the first direction and fixedly connected to the first concave platform or the second concave platform, and the reinforcing plate is adapted to the profile of the concave platform to which it is connected.

[0015] The lower body assembly structure of the present application can effectively reduce the weight of the lower body assembly structure by defining a hollow first cavity inside the door sill beam, which is beneficial to the lightweight of the automobile; at the same time, by arranging a horizontally arranged first support plate in the first cavity to abut the side panels on the left and right sides of the first cavity, and then arranging the vehicle body floor and the first support plate correspondingly, the side impact force transmission path can be effectively optimized, the intrusion of the side impact into the passenger compartment can be reduced, and the side impact safety performance of the entire vehicle can be improved.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of the lower vehicle body assembly structure according to an embodiment of the present application is shown;

[0019] Figure 2 A front view of the lower vehicle body assembly structure according to an embodiment of the present application is shown;

[0020] Figure 3 Shows Figure 2 The enlarged schematic diagram of point A in the middle;

[0021] Figure 4 A schematic structural diagram of a crossbeam body of a front seat crossbeam assembly according to an embodiment of the present application is shown;

[0022] Figure 5 A schematic structural diagram of a crossbeam body of a rear seat crossbeam assembly described in an embodiment of the present application is shown.

[0023] Description of Figure Numbers:

[0024] 1-Body floor,

[0025] 2 / 2'-seat crossbeam assembly, 21 / 21'-crossbeam body, 211-second cavity, 212-second support plate, 213-first concave platform, 214-second concave platform, 215-reinforcement plate, 22-crossbeam connector,

[0026] 3-sill beam, 31-first cavity, 311-upper cavity, 3111-first reinforcement rib, 3112-second cavity, 3113-third cavity, 312-lower cavity, 3121-second reinforcement rib, 3122-fourth cavity, 31221-third reinforcement rib, 31222-fourth upper cavity, 31223-fourth lower cavity, 3123-fifth cavity, 31231-fourth reinforcement rib, 31232-fifth upper cavity, 31233-fifth lower cavity, 313-first cavity, 32-first supporting plate, 321-first connecting plate, 322-second connecting plate, 33-outer plate, 34-inner plate, 35-upper plate, 36-lower plate, 37-flange.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0029] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0031] It should also be noted that the first direction S1 mentioned in this embodiment can be understood as the axial direction on the width of the vehicle body; the second direction S2 mentioned in this embodiment can be understood as the axial direction on the length of the vehicle body; the third direction S3 mentioned in this embodiment can be understood as the axial direction on the height of the vehicle body.

[0032] like Figures 1 to 3 As shown, this embodiment provides a lower vehicle body assembly structure, including a vehicle body floor 1, at least one seat crossbeam assembly 2 and a threshold beam 3, wherein the seat crossbeam assembly 2 is arranged above the vehicle body floor 1 along a first direction S1 and is fixedly connected to the vehicle body floor 1; the threshold beam 3 is arranged on one side of the vehicle body floor 1 along a second direction S2 and is connected to the vehicle body floor 1 and the seat crossbeam assembly 2; the threshold beam 3 is defined inside with a first cavity 31 penetrating along the second direction S2, and based on the cross section where the first cavity 31 is located, the left and right sides thereof are respectively an outer side plate 33 and an inner side plate 34 of the threshold beam 3, and the upper and lower sides thereof are respectively an upper side plate 35 and a lower side plate 36 of the threshold beam 3. By setting the first cavity 31, on the one hand, the weight of the lower vehicle body assembly structure can be reduced, which is beneficial to the lightweight of the vehicle; on the other hand, the threshold beam 3 can be made When the vehicle is hit sideways, a certain degree of collapse occurs in the first cavity 31 to absorb the collision energy; at the same time, a first support plate 32 is provided in the first cavity 31, the first support plate 32 is horizontally arranged and extends along the second direction S2, and the two ends of the first support plate 32 located in the first direction S1 are respectively connected to the outer plate 33 and the inner plate 34 on the left and right sides of the first cavity 31, so as to separate the first cavity 31 into an upper cavity 311 and a lower cavity 312; the seat crossbeam assembly 2 is fixedly connected to the door sill beam 3 corresponding to the upper cavity 311, and the fixed connection method includes but is not limited to bolt connection or welding, etc., and the vehicle body floor 1 is abutted against the inner plate 34 corresponding to the lower cavity 312, and the setting height of the end of the vehicle body floor 1 for abutting the inner plate 34 in the third direction S3 corresponds to the setting height of the first support plate 32 in the third direction S3. In this way, when the vehicle encounters a side collision, the side collision force exerted on the sill beam 3 can be effectively transmitted to the seat crossbeam assembly 2 and the vehicle body floor 1 through the upper side plate 35 on the upper side of its first cavity 31 and the first support plate 32 inside the first cavity 31, ensuring that the force transmission path is not interrupted, thereby effectively reducing the amount of intrusion of the side collision into the passenger compartment; at the same time, the portion of the sill beam 3 defined by the lower cavity 312 can also provide certain side collision protection for the battery pack-related structures located under the vehicle body floor 1, thereby improving the side collision safety performance of the entire vehicle.

[0033] It can be understood that the above embodiment mainly describes the structural composition and connection method of the seat cross beam assembly 2 and the door sill beam 3 on one side of the vehicle body floor 1, while for the other side of the vehicle body floor 1, such as Figure 1 As shown, the same structural composition and connection method as above can also be used to symmetrically set on the other side of the vehicle body floor 1 to achieve the same technical effect as above, and realize the protection of the vehicle on both sides in the first direction S1. In addition, in other embodiments, if a middle channel is provided in the middle of the vehicle body floor 1 of the rear seat, the other end of the seat cross beam assembly 2 can also be connected to the middle channel, and a lower body assembly structure symmetrical to the side of the middle channel is used on the other side to realize the protection of the vehicle on both sides in the first direction S1, which will not be repeated here.

[0034] In some embodiments, Figure 3 As shown, the first support plate 32 is provided with a first connecting plate 321 and a second connecting plate 322 at one end away from the vehicle body floor 1, and the first support plate 32 is connected to the outer side plate 33 through the first connecting plate 321 and the second connecting plate 322; wherein the first connecting plate 321 is arranged to be tilted upward and extends along the second direction S2, and the second connecting plate 322 is arranged to be tilted downward and extends along the second direction S2, so as to define a first chamber 313 between the outer side plate 33, the first connecting plate 321 and the second connecting plate 322. In this way, when the vehicle is hit from the side, the first connecting plate 321 and the second connecting plate 322 can be separated upward and downward along the third direction S3 at one end of the first support plate 32 away from the vehicle body floor 1, respectively, so that the sill beam 3 is collapsed to a certain extent at the first chamber 313 to absorb part of the collision energy and reduce the impact on the vehicle body.

[0035] For example, Figure 3As shown, in this embodiment, the upper and lower parts of the outer plate 33 can be tilted toward the side close to the vehicle body floor 1; at this time, the first connecting plate 321 is tilted upward, and its upper end is connected to the upper part of the outer plate 33, and its lower end is connected to the end of the first support plate 32 away from the vehicle body floor 1; the second connecting plate 322 is tilted downward, and its lower end is connected to the middle part of the outer plate 33, and its upper end is connected to the end of the first support plate 32 away from the vehicle body floor 1, and is collinear with the lower end of the first connecting plate 321 at the connection, that is, at the outer plate 33 and the first connecting plate 321, A first chamber 313 is enclosed between the first connecting plate 321 and the second connecting plate 322; in normal use, the upper part of the outer panel 33 can be supported by the first connecting plate 321, and the middle part of the outer panel 33 can be supported by the second connecting plate 322 to prevent the outer panel 33 from being deformed; when the vehicle has a side collision, the upper end of the first connecting plate 321 and the lower end of the second connecting plate 322 can be separated upward and downward along the third direction S3 respectively, so that the sill beam 3 will produce a certain degree of collapse in the first chamber 313, so as to achieve the purpose of absorbing the collision energy and reducing the impact on the vehicle body.

[0036] In some embodiments, Figure 3 As shown, at least one first reinforcing rib 3111 can also be arranged in the upper cavity 311, and the first reinforcing rib 3111 is arranged vertically and extends along the second direction S2, and the two ends of the first reinforcing rib 3111 located in the third direction S3 are respectively connected to the upper side plate 35 on the upper side of the first cavity 31 and the upper plate surface of the first support plate 32, so as to separate the upper cavity 311 into a second chamber 3112 and a third chamber 3113. In this way, through the arrangement of the first reinforcing rib 3111, the vertical pressure exerted on the upper side plate 35 can be transmitted to the first support plate 32, thereby improving the structural strength and stability of the space where the upper cavity 311 is located; at the same time, the separated second chamber 3112 and the third chamber 3113 can also be used for the classification and arrangement of wiring harnesses, thereby improving the space utilization of the structure. Similarly, a second reinforcing rib 3121 can also be arranged in the lower cavity 312, and the second reinforcing rib 3121 is arranged vertically and extends along the second direction S2, and the two ends of the second reinforcing rib 3121 located in the third direction S3 are respectively connected to the lower side plate 36 on the lower side of the first cavity 31 and the lower plate surface of the first support plate 32, so as to separate the lower cavity 312 into a fourth chamber 3122 and a fifth chamber 3123. In this way, through the arrangement of the second reinforcing rib 3121, the vertical pressure exerted on the support plate can be transmitted to the lower side plate 36 of the sill beam 3, thereby improving the structural strength and stability of the space where the lower cavity 312 is located; at the same time, the separated fourth chamber 3122 and fifth chamber 3123 can also be used for the classification and arrangement of wiring harnesses, thereby improving the space utilization of the structure.

[0037] Furthermore, if Figure 3As shown, one end of the second reinforcing rib 3121 close to the first support plate 32 can be connected to the end of the first support plate 32 away from the vehicle body floor 1 so as to be colinear with the lower end of the first connecting plate 321 and the upper end of the second connecting plate 322 at the connection point, so that the load borne by the outer plate 33 can be transmitted to the second reinforcing rib 3121 through the first connecting plate 321 and the second connecting plate 322, thereby optimizing the transmission path of the collision force or the extrusion force.

[0038] In some embodiments, Figure 3 As shown, a third reinforcing rib 31221 is further provided in the fourth chamber 3122, the third reinforcing rib 31221 is horizontally arranged and extends along the second direction S2, and the two ends of the third reinforcing rib 31221 located in the first direction S1 are respectively connected to the outer plate 33 and the second reinforcing rib 3121, so as to separate the fourth chamber 3122 into a fourth upper chamber 31222 and a fourth lower chamber 31223; a fourth reinforcing rib 31231 is further provided in the fifth chamber 3123, the fourth reinforcing rib 31231 is horizontally arranged and extends along the second direction S2, and the two ends of the fourth reinforcing rib 31231 located in the first direction S1 are respectively connected to the inner plate 34 and the second reinforcing rib 3121, so as to separate the fifth chamber 3123 into a fifth upper chamber 31232 and a fifth lower chamber 31233; Among them, the setting height of the third reinforcing rib 31221 in the third direction S3 is the same as the setting height of the fourth reinforcing rib 31231 in the third direction S3, so that the third reinforcing rib 31221 and the fourth reinforcing rib 31231 can be connected with the second reinforcing rib 3121 to form a cross structure, which can significantly improve the structural strength and connection stability of the space where the lower cavity 312 is located, and reduce the risk of tearing of the threshold beam 3 when the vehicle has a side collision, so as to effectively protect the battery pack-related structure located under the vehicle body floor 1 from a side collision, and improve the side collision safety performance of the whole vehicle; at the same time, the separated fourth upper chamber 31222, fourth lower chamber 31223, fifth upper chamber 31232 and fifth lower chamber 31233 can also be used for the classified arrangement of wiring harnesses to improve the space utilization of the structure.

[0039] In some embodiments, Figure 3 As shown, the outer side surface of the inner plate 34 extends outward along the first direction S1 to form a flange 37, and the setting height of the flange 37 in the third direction S3 is slightly lower than the setting height of the first support plate 32 in the third direction S3. When the sill beam 3 is installed on the side of the vehicle body floor 1, the upper side surface of the flange 37 abuts against the lower side of the vehicle body floor 1. In this way, on the one hand, the vehicle body floor 1 can be positioned by the flange 37 to facilitate the installation and connection of the vehicle body floor 1. On the other hand, the flange 37 can be used to improve the connection strength and connection stability between the sill beam 3 and the vehicle body floor 1.

[0040] In some embodiments, Figures 1 to 3As shown, the seat cross beam assembly 2 includes a cross beam body 21 and a cross beam connector 22, wherein the cross beam body 21 is fixedly connected to the vehicle body floor 1 along a first direction S1, and the fixed connection method includes but is not limited to bolt connection or welding, and one end of the cross beam body 21 abuts against the inner side plate 34, so that when the vehicle has a side collision, the cross beam body 21 can provide collision support for the threshold beam 3, and the collision force on the threshold beam 3 can be effectively transmitted to the cross beam body 21 and the vehicle body floor 1 connected to the cross beam body 21; one end of the cross beam connector 22 is connected to the cross beam body The end of the body 21 is fixedly connected by welding or bolting, and the other end is bent upward and fixedly connected to the upper side plate 35 of the threshold beam 3 by welding or bolting. In this way, the cross beam connector 22 is formed as a slope structure above the end of the cross beam body 21. When subjected to force and compression, the cross beam connector 22 can bend inward to provide a certain amount of energy absorption and buffering, thereby reducing the impact damage caused by side collision; at the same time, the upper side plate 35 can also effectively transfer the collision force received to the cross beam body 21 through the cross beam connector 22, thereby achieving the purpose of optimizing the load transfer path.

[0041] In some embodiments, Figure 4 As shown, the interior of the cross beam body 21 is further defined with a second cavity 211 which is arranged to penetrate along the first direction S1. In terms of the cross section where the second cavity 211 is located, its left and right sides are respectively the left and right plates of the cross beam body 21, and its upper and lower sides are respectively the top plate and the bottom plate of the cross beam body 21. By setting the second cavity 211, on the one hand, the weight of the lower body composite structure can be reduced, which is beneficial to the lightweight of the automobile; on the other hand, the plates around the second cavity 211 enclose the second cavity 211 into a closed body, which can improve the ability of the cross beam body 21 to resist side collision deformation; at the same time, at least one second support plate 212 is arranged in the second cavity 211, and the second support plate 212 is arranged vertically and extends along the first direction S1. At this time, the two ends of the second support plate 212 located in the third direction S3 are respectively connected to the top plate and the bottom plate on the upper and lower sides of the second cavity 211, which can effectively improve the torque resistance of the cross beam body 21 in the third direction S3 on the one hand, and can also improve the extrusion resistance of the cross beam body 21 in the first direction S1 on the other hand.

[0042] Preferably, the width of the top plate of the beam body 21 may be slightly smaller than the width of the bottom plate thereof, so as to form a "J"-shaped structure that is narrow at the top and wide at the bottom, so as to improve the anti-torque capability of the beam body 21 in the third direction S3.

[0043] In some embodiments, Figure 4 and Figure 5As shown, the upper end surface of the beam body 21' is provided with a first recess 213 recessed downward along the third direction S3, and the first recess 213 is extended along the first direction S1; and / or the lower end surface of the beam body 21 is provided with a second recess 214 recessed upward along the third direction S3, and the second recess 214 is extended along the first direction S1. By setting the first recess 213 and / or the second recess 214, the torque resistance of the beam body 21 / 21' can be improved, and the probability of bending of the beam body 21 / 21' in the event of a side collision can be reduced.

[0044] For example, Figure 1 , Figure 4 and Figure 5 As shown, in the present embodiment, two seat cross beam assemblies 2 are provided, including a front seat cross beam assembly 2 and a rear seat cross beam assembly 2'. The front seat cross beam assembly 2 and the rear seat cross beam assembly 2' are spaced apart along the second direction S2. On the one hand, they can provide effective support for the seats. On the other hand, they can provide multiple force transmission points in the second direction S2, thereby improving the overall structural strength and side collision safety performance of the lower body composite structure. At this time, a second recess 214 can be set at the bottom of the beam body 21 of the front seat beam assembly 2, and a first recess 213 can be set at the top of the beam body 21' of the rear seat beam assembly 2'. In this way, on the one hand, the second recess 214 and the first recess 213 can be used to respectively improve the torque resistance of the front seat beam assembly 2 and the rear seat beam assembly 2'. On the other hand, the rear seat beam assembly 2' plays a major role in bearing the weight of the seats and occupants. Therefore, the first recess 213 can also be used to improve the bending resistance of the top plate of the rear seat beam assembly 2' in the third direction S3 to prevent the top plate of the rear seat beam assembly 2' from bending downward.

[0045] It is understandable that in other embodiments, the first concave platform 213 and the second concave platform 214 may be provided on the same beam body 21 at the same time, and they may be selected and provided according to specific design requirements, which will not be described in detail here.

[0046] In some embodiments, Figure 4 As shown, the cross beam body 21 further includes a reinforcing plate 215, which is extended along the first direction S1 and fixedly connected to the first concave platform 213 or the second concave platform 214, and the reinforcing plate 215 is adapted to the profile of the concave platform to which it is connected. Figure 4 As shown, in the present embodiment, a reinforcement plate 215 matched with the profile of the second recess 214 is provided at the second recess 214 of the beam body 21 of the front seat beam assembly 2. The provision of the reinforcement plate 215 can significantly improve the structural strength of the beam body 21, and reduce the deformation of the beam body 21 when the vehicle has a side collision, thereby effectively reducing the intrusion of the side collision into the passenger compartment, thereby reducing the damage to the occupants.

[0047] Preferably, the reinforcing plate 215 can be made of a hot-formed steel plate, and the high rigidity of the reinforcing plate 215 can be used to provide excellent anti-extrusion capability, while the crossbeam body 21 can be made of aluminum to reduce the weight of the structure.

[0048] In addition, the embodiment of the utility model can also provide a vehicle, including the lower vehicle body assembly structure in the above embodiment. For other structures and working principles of the lower vehicle body assembly structure, please refer to the above description of the embodiment of the lower vehicle body assembly structure. Since the lower vehicle body assembly structure has the above technical effects, the vehicle having the lower vehicle body assembly structure should also have the corresponding technical effects, which will not be repeated here.

[0049] In this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined. And the description of the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.

[0051] The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradicting each other.

[0052] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made according to the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A lower vehicle body assembly structure, characterized in that: include: body floor; at least one seat cross beam assembly, the seat cross beam assembly being disposed above the vehicle body floor along a first direction and fixedly connected to the vehicle body floor; and A threshold beam, the threshold beam is arranged on one side of the vehicle body floor along the second direction and connected to the vehicle body floor and the seat crossbeam assembly; a first cavity is defined inside the threshold beam and is arranged to penetrate along the second direction, a first support plate is arranged in the first cavity, the first support plate is arranged horizontally and extends along the second direction, and two ends of the first support plate located in the first direction are respectively connected to the outer side plate and the inner side plate on the left and right sides of the first cavity, so as to separate the first cavity into an upper cavity and a lower cavity; Among them, the seat crossbeam assembly is fixedly connected to the door sill beam corresponding to the upper cavity, the vehicle body floor is abutted against the inner panel corresponding to the lower cavity, and the end of the vehicle body floor for abutting against the inner panel is set at a height in the third direction corresponding to the setting height of the first support plate in the third direction.

2. The lower vehicle body assembly structure according to claim 1, characterized in that: A first connecting plate and a second connecting plate are provided at one end of the first supporting plate away from the vehicle body floor, and the first supporting plate is connected to the outer side plate through the first connecting plate and the second connecting plate; The first connecting plate is tilted upward and extends along the second direction, and the second connecting plate is tilted downward and extends along the second direction, so as to define a first chamber between the outer plate, the first connecting plate and the second connecting plate.

3. The lower vehicle body assembly structure according to claim 2, characterized in that: At least one first reinforcing rib is disposed in the upper cavity, the first reinforcing rib is vertically disposed and extends along the second direction, and two ends of the first reinforcing rib located in the third direction are respectively connected to the upper side plate on the upper side of the first cavity and the upper plate surface of the first support plate, so as to separate the upper cavity into a second cavity and a third cavity; A second reinforcing rib is provided in the lower cavity, the second reinforcing rib is vertically arranged and extends along the second direction, and the two ends of the second reinforcing rib located in the third direction are respectively connected to the lower side plate on the lower side of the first cavity and the lower plate surface of the first support plate to separate the lower cavity into a fourth cavity and a fifth cavity.

4. The lower vehicle body assembly structure according to claim 3, characterized in that: One end of the second reinforcing rib close to the first supporting plate is connected to one end of the first supporting plate away from the vehicle body floor.

5. The lower vehicle body assembly structure according to claim 4, characterized in that: A third reinforcing rib is further provided in the fourth chamber, the third reinforcing rib is horizontally arranged and extends along the second direction, and two ends of the third reinforcing rib located in the first direction are respectively connected to the outer plate and the second reinforcing rib, so as to separate the fourth chamber into a fourth upper chamber and a fourth lower chamber; A fourth reinforcing rib is further provided in the fifth chamber, the fourth reinforcing rib is horizontally arranged and extends along the second direction, and two ends of the fourth reinforcing rib located in the first direction are respectively connected to the inner plate and the second reinforcing rib, so as to separate the fifth chamber into a fifth upper chamber and a fifth lower chamber; Wherein, a setting height of the third reinforcing rib in the third direction is the same as a setting height of the fourth reinforcing rib in the third direction.

6. The lower vehicle body assembly structure according to claim 1, characterized in that: The outer side surface of the inner plate extends along the first direction to form a flange, and the upper side surface of the flange abuts against the lower side of the vehicle body floor.

7. The lower vehicle body assembly structure according to any one of claims 1 to 6, characterized in that: The seat crossbeam assembly includes a crossbeam body and a crossbeam connector, wherein: The cross beam body is fixedly connected to the vehicle body floor along the first direction, and one end of the cross beam body close to the door sill beam abuts against the inner side plate; One end of the crossbeam connecting piece is fixedly connected to the end of the crossbeam body, and the other end is bent upward and fixedly connected to the upper side plate of the threshold beam.

8. The lower vehicle body assembly structure according to claim 7, characterized in that: A second cavity is defined inside the crossbeam body and is arranged to penetrate along the first direction. At least one second support plate is arranged in the second cavity. The second support plate is arranged vertically and extends along the first direction.

9. The lower vehicle body assembly structure according to claim 8, characterized in that: The upper end surface of the beam body is provided with a first concave platform recessed downward along the third direction, and the first concave platform is extended along the first direction; and / or the lower end surface of the beam body is provided with a second concave platform recessed upward along the third direction, and the second concave platform is extended along the first direction.

10. The lower vehicle body assembly structure according to claim 9, characterized in that: The crossbeam body further comprises a reinforcing plate, which is extended along the first direction and fixedly connected to the first concave platform or the second concave platform, and the reinforcing plate is adapted to the profile of the concave platform to which it is connected.

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