Lower vehicle body assembly and vehicle

Abstract

The embodiment of the utility model relates to the technical field of vehicles, and discloses a lower vehicle body assembly and a vehicle, the lower vehicle body assembly comprises a front collision beam assembly, a forecabin assembly, a front floor assembly, a rear floor assembly, a rear skirt panel assembly and a rear collision beam assembly which are sequentially connected from front to back in the length direction of the vehicle, and part of the components are aluminum alloy components; according to the lower vehicle body assembly, the whole lower vehicle body assembly is of a steel-aluminum mixed structure, the aluminum alloy components can integrate a plurality of components of complex parts into an integral component, the weight is reduced, and meanwhile the assembly difficulty of local positions can be lowered; the parts in the form of steel structural parts ensure the structural strength of the local position of the lower vehicle body, meanwhile, the machining and manufacturing difficulty of the parts is lower, and the requirement for the structural strength of the lower vehicle body, the requirement for assembly process simplification and the part machining difficulty are effectively balanced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle technology, and in particular to a lower body assembly and a vehicle. Background Art

[0002] The underbody of a vehicle is the foundation of the vehicle body. The stiffness, strength and other properties of the underbody will directly affect the life and driving safety of the vehicle. Especially in electric vehicles, the weight of the underbody will also directly affect the endurance energy consumption of the electric vehicle. In order to better meet the endurance requirements and body safety performance requirements of electric vehicles, it is necessary to continuously explore possible design methods for the underbody.

[0003] The existing lower body is usually made of all-steel or all-aluminum. Although the all-steel lower body has high structural strength, it will greatly increase the overall weight of the lower body, which will greatly reduce the endurance of the electric vehicle. Although the all-aluminum lower body has sufficient structural strength and is light in overall weight, the parts processing and assembly steps of this type of lower body are numerous and difficult, which will significantly increase the difficulty of manufacturing the vehicle and make the vehicle difficult to manufacture. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a lower body assembly and a vehicle, which solve the problem that the structural form of the lower body of the existing vehicle is difficult to manufacture.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] In the first aspect, the embodiment of the present application provides a lower vehicle body assembly, including a front collision beam assembly, a front cabin assembly, a front floor assembly, a rear floor assembly, a rear apron assembly and a rear collision beam assembly, which are sequentially connected from front to rear along the length direction of the vehicle; the front collision beam assembly and the rear collision beam assembly are aluminum alloy components; the front floor assembly and the rear apron assembly are steel structures; the front cabin assembly includes a front support body, a front panel assembly and a shock tower assembly, the front support body is respectively connected to the front collision beam assembly and the front floor assembly, the front panel assembly and the shock tower assembly are arranged on the front support body, the front support body is a steel structure, and the shock tower assembly is an aluminum alloy component; The floor assembly includes a rear floor support body, a rear floor front support assembly, a rear floor edge support assembly, a rear floor rear support assembly and a rear floor longitudinal beam assembly. The rear floor front support assembly is arranged at the front part of the rear floor support body in the vehicle length direction, the rear floor rear support assembly is arranged at the rear part of the rear floor support body in the vehicle length direction, the rear floor edge support assembly is arranged on both sides of the rear floor support body in the vehicle width direction, and the rear floor longitudinal beam assembly is arranged at the rear floor rear support assembly. The rear floor support body and the rear floor longitudinal beam assembly are aluminum alloy components, and the rear floor front support assembly, the rear floor edge support assembly and the rear floor rear support assembly are steel structures.

[0007] The lower body assembly provided in the embodiment of the present application, this type of front collision beam assembly and rear collision beam assembly can effectively reduce the weight of the front and rear sides of the lower body, and also has the advantage of being easy to process and install. This type of shock tower assembly can effectively reduce the structural complexity of the front cabin assembly, and while reducing the weight, it can also effectively reduce the number of welded parts in the front cabin assembly, simplifying the assembly steps. This type of rear floor support body and rear floor longitudinal beam assembly can make the rear part of the lower body more integrated, reduce the circumference of the rear part of the lower body, and effectively reduce the number of welding sequences during assembly. The lower body assembly as a whole adopts a steel-aluminum hybrid structure, and the aluminum alloy components can integrate multiple components in complex parts into an integral component, which can reduce the weight and reduce the difficulty of assembly at local locations. The components in the form of steel structural parts can ensure the structural strength of the local positions of the lower body while having lower processing and manufacturing difficulty, effectively balancing the structural strength requirements of the lower body, the requirements for simplifying the assembly process, and the difficulty of component processing, and effectively solving the problem that the structural form of the lower body of existing vehicles is difficult to manufacture.

[0008] In a possible implementation of the present application, the front panel assembly includes an upper panel and a lower panel, the upper panel is assembled and connected to the lower panel, and the two are respectively assembled and connected to the front support body and the front floor assembly, and the lower panel has a mating surface that cooperates with the operating pedal, and the mating surface is symmetrically arranged along the center line in the width direction of the vehicle.

[0009] Beneficial effects: A split front panel assembly is adopted, and the lower panel has symmetrically arranged mating surfaces, which can be used for both left-hand drive and right-hand drive models. When the model is changed, only the structural form of the upper panel needs to be changed accordingly, which can greatly reduce the development cost of the model.

[0010] In a possible implementation of the present application, the front floor assembly includes a front floor support assembly and a front door sill, the front door sills are arranged on both sides of the front floor support assembly in the vehicle width direction, the rear floor edge support assembly includes a rear door sill, the rear door sills are arranged on both sides of the rear floor support body in the vehicle width direction, and the lower body assembly also includes a door sill reinforcement assembly, the door sill reinforcement assembly extends along the length direction of the vehicle, and the door sill reinforcement assembly is respectively assembled and connected with the corresponding front door sill and rear door sill.

[0011] Beneficial effect: By matching the front door sill with the rear door sill and connecting the front door sill and the rear door sill at the same time through an integral door sill reinforcement assembly, the number of smaller reinforcement parts used can be effectively reduced, the structural strength at the door sill position can be improved, and the assembly steps can be simplified.

[0012] In a possible implementation of the present application, the door sill reinforcement assembly is an aluminum alloy component, and / or the front floor support assembly includes a front floor front cross beam assembly, a front floor panel body and a front floor rear cross beam assembly, the front floor front cross beam assembly is assembled and connected to the front floor rear cross beam assembly, and both are assembled and connected to the front floor panel body at the same time, the front floor front cross beam assembly has a first cross beam and a second cross beam arranged along the length direction of the vehicle, and the front floor rear cross beam assembly has a third cross beam and a fourth cross beam arranged along the length direction of the vehicle.

[0013] Beneficial effects: This type of door sill reinforcement assembly can improve the side collision performance of the lower vehicle body, while its own weight is relatively light. The front floor front cross beam assembly, the front floor plate body and the front floor rear cross beam assembly overlap and are assembled and connected. The four cross beams jointly support and strengthen the overall structural strength of the front floor support assembly, thereby improving the reliability of the front floor assembly.

[0014] In a possible implementation of the present application, the lower body assembly also includes a front cabin reinforcement assembly, which is respectively assembled and connected to the shock tower assembly and the front panel assembly to form a support, and / or the lower body assembly also includes a front cabin front cross beam assembly, which is arranged at a position of the front support body close to the front side in the length direction of the vehicle, the front cabin front cross beam assembly is detachably connected to the front support body, and the front cabin front cross beam assembly has a box mounting position for installing a storage box.

[0015] Beneficial effects: The front cabin reinforcement assembly can effectively enhance the structural integrity of the shock tower assembly and the front panel assembly. Since the front cabin front cross beam assembly is detachable, when used in pure electric vehicles, the front cabin front cross beam assembly can be used to carry the storage box on the front side of the vehicle. When used in extended-range vehicles, it can be disassembled to free up installation space for corresponding structural parts such as the range extender. The components are simple and reliable and have strong flexibility in use.

[0016] In a possible implementation of the present application, the number of front support bodies is two and they are spaced apart along the width direction of the vehicle, the front support bodies include a front cabin longitudinal beam assembly, a shock tower reinforcement assembly and a front cabin upper side beam assembly, the front cabin longitudinal beam assembly, the shock tower reinforcement assembly, the front cabin upper side beam assembly and the front cabin longitudinal beam assembly are sequentially connected and enclosed to form a shock tower mounting position, the shock tower assembly is arranged at the corresponding shock tower mounting position, and the shock tower assembly is respectively assembled and connected with the front cabin longitudinal beam assembly, the shock tower reinforcement assembly and the front cabin upper side beam assembly.

[0017] Beneficial effects: This form of front support main body structure is reliable and can provide good support for the shock tower assembly.

[0018] In a possible implementation of the present application, a mounting component for suspending the range extender is provided on the front cabin longitudinal beam assembly, and / or a plurality of energy absorption holes are provided on the front cabin longitudinal beam assembly, and the energy absorption holes are arranged at intervals along the length direction of the vehicle.

[0019] Beneficial effects: This type of front cabin longitudinal beam assembly can be adapted to pure electric configuration components and can also be installed for extended-range configuration components. The energy-absorbing holes can be compressed and deformed when a collision occurs on the front side of the front cabin longitudinal beam assembly, thereby absorbing the energy of the collision and reducing the impact on passengers in the vehicle.

[0020] In a possible implementation of the present application, the front cabin assembly also includes A-pillar inner panel assemblies arranged on both sides of the front panel assembly, the A-pillar inner panel assemblies are respectively assembled and connected to the front panel assembly and the front support body, and / or the front collision beam assembly is an aluminum alloy profile structural member, and the front collision beam assembly has at least one energy absorption cavity extending along the width direction of the vehicle.

[0021] Beneficial effects: The structure is simple and reliable, easy to process and manufacture, the front collision beam assembly is lighter in weight, and can also provide better collision crush energy absorption effect.

[0022] In a possible implementation of the present application, the rear floor front support assembly includes a rear floor front cross beam assembly and a rear floor upper panel assembly, the rear floor support body has a panel mounting position for installing the rear floor panel assembly, the rear floor front cross beam assembly extends along the width direction of the vehicle, the rear floor front cross beam assembly is respectively assembled and connected to the rear floor support body and the rear floor upper panel assembly, and / or the rear floor edge support assembly includes a wheel hub package front connecting assembly and a wheel hub package rear connecting assembly, the wheel hub package front connecting assembly is arranged on both sides of the middle part of the rear floor support body, and the wheel hub package rear connecting assembly is arranged on both sides of the middle part of the rear floor support body.

[0023] Beneficial effects: The rear floor front cross beam assembly and the rear floor upper panel assembly can form a reliable and effective support structure along the vehicle length and width directions on the front side of the rear floor support body in the vehicle length direction, and the rear floor edge support assembly can form a high-strength support structure at the position of the rear floor support body corresponding to the wheel hub.

[0024] In a second aspect, an embodiment of the present application provides a vehicle, which includes: the above-mentioned lower body assembly; and an upper body assembly assembled and connected to the lower body assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A top view of the lower vehicle body assembly provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A front view of the lower body assembly is shown;

[0027] Figure 3 for Figure 1 A top view of the front compartment assembly of the lower vehicle body assembly shown;

[0028] Figure 4 for Figure 3 An exploded schematic diagram of the front cabin assembly is shown;

[0029] Figure 5 for Figure 4 The schematic diagram of the assembly of the front support body and the shock tower assembly of the front cabin assembly is shown;

[0030] Figure 6 for Figure 1 An exploded schematic diagram of the front support body and shock tower assembly is shown;

[0031] Figure 7 for Figure 4 A three-dimensional schematic diagram of a front panel assembly of a front cabin assembly shown;

[0032] Figure 8 for Figure 7 An exploded schematic diagram of the cowl assembly is shown;

[0033] Fig. 9 for Figure 1 An exploded schematic diagram of the rear floor assembly of the lower body assembly is shown;

[0034] Fig.10 for Figure 1 An exploded schematic diagram of the front floor assembly of the lower body assembly is shown;

[0035] Fig.11 for Figure 1 A top view of a rocker reinforcement assembly of a lower body assembly is shown;

[0036] Fig.12 for Figure 1 A top view of the rear apron assembly and rear impact beam assembly of the lower body assembly shown;

[0037] Fig.13 for Figure 1 A top view of the front impact beam assembly of the lower body assembly is shown;

[0038] Fig.14 for Figure 2 A cross-sectional view of the front impact beam assembly of the lower body assembly shown;

[0039] Fig.15 for Figure 1 A top view of the front cabin reinforcement assembly of the lower body assembly shown;

[0040] Fig.16 for Figure 1 A top view of the front cross beam assembly of the front cabin of the lower body assembly is shown.

[0041] Reference numerals:

[0042] 1. Front collision beam assembly; 101. Energy absorption chamber;

[0043] 2. Front cabin assembly; 201. Front support body; 2011. Front cabin longitudinal beam assembly; 20111. Installation components; 20112. Energy absorption hole; 2012. Shock tower reinforcement assembly; 2013. Front cabin upper side beam assembly; 202. Front wall panel assembly; 2021. Upper wall panel; 2022. Lower wall panel; 2023. Matching surface; 2024. Installation through hole; 203. Shock tower assembly; 204. A-pillar inner panel assembly;

[0044] 3. Front floor assembly; 301. Front floor support assembly; 3011. Front floor front crossbeam assembly; 3012. Front floor plate; 3013. Front floor rear crossbeam assembly; 3014. First crossbeam; 3015. Second crossbeam; 3016. Third crossbeam; 3017. Fourth crossbeam; 302. Front door sill;

[0045] 4. Rear floor assembly; 401. Rear floor support body; 4011. Panel mounting position; 402. Rear floor front support assembly; 4021. Rear floor front crossbeam assembly; 4022. Rear floor upper panel assembly; 403. Rear floor edge support assembly; 4031. Rear door sill; 4032. Wheel hub front connection assembly; 4033. Wheel hub rear connection assembly; 404. Rear floor rear support assembly; 405. Rear floor longitudinal beam assembly;

[0046] 5. Rear apron assembly; 6. Rear collision beam assembly; 7. Door sill reinforcement assembly; 8. Front cabin reinforcement assembly; 9. Front cabin front cross beam assembly. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0048] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0049] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0050] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0051] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0052] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0053] Combine the following Figures 1 to 16 , describing an embodiment of the present application.

[0054] According to an embodiment of the present application, on the one hand, a lower body assembly is provided, including a front collision beam assembly 1, a front cabin assembly 2, a front floor assembly 3, a rear floor assembly 4, a rear apron assembly 5 and a rear collision beam assembly 6 which are sequentially connected from front to rear along the length direction of the vehicle, the front collision beam assembly 1 and the rear collision beam assembly 6 are aluminum alloy components, the front floor assembly 3 and the rear apron assembly 5 are steel structures, the front cabin assembly 2 includes a front support body 201, a front wall assembly 202 and a shock tower assembly 203, the front support body 201 is respectively connected to the front collision beam assembly 1 and the front floor assembly 3, the front wall assembly 202 and the shock tower assembly 203 are arranged on the front support body 201, the front support body 201 is a steel structure, the shock tower assembly 203 is an aluminum alloy component, and the rear floor assembly 4 includes a front support body 201, a ... The rear floor support body 401 includes a rear floor front support assembly 402, a rear floor edge support assembly 403, a rear floor rear support assembly 404 and a rear floor longitudinal beam assembly 405. The rear floor front support assembly 402 is arranged at the front part of the rear floor support body 401 in the vehicle length direction, the rear floor rear support assembly 404 is arranged at the rear part of the rear floor support body 401 in the vehicle length direction, the rear floor edge support assembly 403 is arranged on both sides of the rear floor support body 401 in the vehicle width direction, and the rear floor longitudinal beam assembly 405 is arranged at the rear floor rear support assembly 404. The rear floor support body 401 and the rear floor longitudinal beam assembly 405 are aluminum alloy components, and the rear floor front support assembly 402, the rear floor edge support assembly 403 and the rear floor rear support assembly 404 are steel structural components.

[0055] The lower body assembly of the present embodiment is applied, in which the front collision beam assembly 1, the rear collision beam assembly 6, the shock tower assembly 203, the rear floor support body 401 and the rear floor longitudinal beam assembly 405 are aluminum alloy components, and the remaining components are steel structural parts. This form of the front collision beam assembly 1 and the rear collision beam assembly 6 can effectively reduce the weight of the front and rear sides of the lower body, and also has the advantages of easy processing and installation. This form of the shock tower assembly 203 can effectively reduce the structural complexity of the front cabin assembly 2, and can also effectively reduce the number of welded parts in the front cabin assembly 2 while reducing the weight, simplifying the assembly steps. This form of the rear floor support body The lower body 401 and the rear floor longitudinal beam assembly 405 can improve the integrity of the rear part of the lower body, reduce the roundness of the rear part of the lower body and effectively reduce the number of welding sequences during assembly. The lower body assembly as a whole adopts a steel-aluminum hybrid structure. The aluminum alloy components can integrate multiple components in complex parts into an integral component, which can reduce the weight and reduce the difficulty of assembly at local positions. The components in the form of steel structures can ensure the structural strength of the local positions of the lower body while having lower processing and manufacturing difficulty. It effectively balances the requirements for the structural strength of the lower body, the requirements for simplifying the assembly process and the difficulty of component processing, and effectively solves the problem that the structural form of the lower body of existing vehicles is difficult to manufacture.

[0056] It should be noted that, in this embodiment, the length direction of the vehicle refers to Figure 1 The arrow in the middle refers to the "length direction", and the width direction of the vehicle refers to Figure 1 The arrow in the middle indicates the "width direction", and the height direction of the vehicle refers to Figure 2 The arrow in the middle points to the "height direction".

[0057] In addition, there is no strict limitation on the connection method between the various components in this embodiment, and welding, connecting piece connection, bonding, riveting and other connection methods can be used, which can be flexibly selected according to needs.

[0058] In the related art, the front cabin assembly 2 adopts an all-steel structure. This type of front cabin assembly 2 has a large number of components related to the shock tower, a complex overall structure, and requires many assembly and connection steps and many welding processes.

[0059] In the present embodiment, the shock tower related components in the front cabin assembly 2 are assembled to form a shock tower assembly 203. The shock tower assembly 203 is cast by aluminum alloy. The aluminum alloy can significantly reduce the overall weight of the shock tower assembly 203. The casting method can form a more complex structure at one time. Compared with the front cabin assembly 2 in the related art, the front cabin assembly 2 in this embodiment can reduce the weight by 10% and the number of welded parts by 15%.

[0060] In the related art, when the rear floor assembly 4 adopts an all-steel structure, the number of components is large, the number of welding sequences required during assembly is also large, and the rigidity of the welding connection between relatively independent components is poor.

[0061] In the present embodiment, the main supporting components of the rear floor assembly 4 are assembled to form a rear floor supporting body 401. The rear floor supporting body 401 is an integrated structure and is cast from aluminum alloy, which can ensure good integrity of the middle portion of the rear floor assembly 4 and has a higher height. Compared with the rear floor assembly 4 in the related art, the number of welding sequences of components can be reduced by 10% and the weight can be reduced by 8%.

[0062] In the related art, the structure of the lower body dash assembly is usually an integral structure. This type of dash will result in the need to configure more dash assemblies with different structural forms and states when the vehicle model is designed to be compatible with left and right steering.

[0063] In some embodiments of the present application, the front panel assembly 202 includes an upper panel 2021 and a lower panel 2022. The upper panel 2021 is assembled and connected to the lower panel 2022, and the two are assembled and connected to the front support body 201 and the front floor assembly 3 respectively. The lower panel 2022 has a mating surface 2023 that cooperates with the operating pedal. The mating surface 2023 is symmetrically arranged along the center line of the vehicle width direction. A split front panel assembly 202 is adopted, and the lower panel 2022 with a symmetrically arranged mating surface 2023 can be used for left-hand drive vehicles and right-hand drive vehicles. When the vehicle model is changed, it is only necessary to change the structural form of the upper panel 2021 accordingly, which can greatly reduce the development cost of the vehicle model.

[0064] Specifically, Figure 7 and Figure 8 As shown, the upper panel 2021 and the lower panel 2022 are arranged up and down along the height direction of the vehicle, and the lower end of the upper panel 2021 overlaps with the upper end of the lower panel 2022 and is assembled and connected to ensure the structural strength of the connection between the two. At the same time, the upper panel 2021 is provided with a mounting hole 2024 for installing the steering column, and the mounting hole 2024 is arranged at the corresponding height and position of the upper panel 2021 corresponding to the left-hand drive vehicle or the right-hand drive vehicle.

[0065] In addition, if Figure 8 As shown, the overlapping parts of the upper panel 2021 and the lower panel 2022 are located at the lower part of the original integral front panel assembly 202. This type of lower panel 2022 can be applied to both pure electric vehicles and extended-range vehicles.

[0066] Furthermore, the main body of the lower panel 2022 is a hot-formed steel plate. This type of lower panel 2022 has high strength and can effectively alleviate the phenomenon of body parts invading the cab during a front-side collision of the vehicle, thereby improving collision performance.

[0067] In some embodiments of the present application, the front floor assembly 3 includes a front floor support assembly 301 and a front door sill 302, and the front door sill 302 is arranged on both sides of the front floor support assembly 301 in the vehicle width direction. The rear floor edge support assembly 403 includes a rear door sill 4031, and the rear door sill 4031 is arranged on both sides of the rear floor support body 401 in the vehicle width direction. The lower body assembly also includes a door sill reinforcement assembly 7, and the door sill reinforcement assembly 7 extends along the length direction of the vehicle. The door sill reinforcement assembly 7 is respectively assembled and connected with the corresponding front door sill 302 and rear door sill 4031. By correspondingly cooperating with the front door sill 302 and the rear door sill 4031, and connecting the front door sill 302 and the rear door sill 4031 at the same time through the integral door sill reinforcement assembly 7, the number of smaller reinforcement components used can be effectively reduced, the structural strength at the door sill position can be improved, and the assembly steps can be simplified.

[0068] In the related art, the threshold assembly of the lower body is usually designed with an all-steel structure or an all-aluminum structure. Under the condition of meeting the collision requirements, the all-steel threshold assembly is heavy, which will affect the endurance of the electric vehicle, while the all-aluminum threshold assembly has more overall machining steps, which will significantly increase the manufacturing difficulty and manufacturing cycle of the threshold assembly.

[0069] In some embodiments of the present application, the rocker reinforcement assembly 7 is an aluminum alloy component. This type of rocker reinforcement assembly 7 can improve the side collision performance of the lower vehicle body. At the same time, its own weight is relatively light. Compared with a rocker assembly with an all-steel structure, the number of parts can be reduced by 5%, and compared with a rocker assembly with an all-steel structure, the machining position of the components can be reduced by 50%.

[0070] In addition, it should be noted that the threshold reinforcement assembly 7 is not only assembled and connected with the front threshold 302 and the rear threshold 4031. In order to further enhance the effect of the threshold reinforcement assembly 7, the threshold reinforcement assembly 7 is also connected to the corresponding other main supporting components in the front cabin assembly 2, the front floor assembly 3 and the rear floor assembly 4. The specific connecting components can be flexibly selected according to needs.

[0071] Preferably, the door sill reinforcement assembly 7 of the present embodiment is an aluminum alloy profile, the front door sill 302 and the rear door sill 4031 are made of steel hot-formed material, and the door sill reinforcement assembly 7 is connected to the corresponding components by means of screws and structural adhesives. The door sill reinforcement assembly 7 can enhance the torsional stiffness of the entire lower vehicle body and can effectively prevent side collisions and pillar collisions.

[0072] In some embodiments of the present application, the front floor support assembly 301 includes a front floor front cross beam assembly 3011, a front floor panel body 3012 and a front floor rear cross beam assembly 3013. The front floor front cross beam assembly 3011 is assembled and connected with the front floor rear cross beam assembly 3013, and both are assembled and connected with the front floor panel body 3012 at the same time. The front floor front cross beam assembly 3011 has a first cross beam 3014 and a second cross beam 3015 arranged along the length direction of the vehicle. The front floor rear cross beam assembly 3013 has a third cross beam 3016 and a fourth cross beam 3017 arranged along the length direction of the vehicle. The front floor front cross beam assembly 3011, the front floor panel body 3012 and the front floor rear cross beam assembly 3013 overlap and are assembled and connected. The four cross beams jointly support and strengthen the overall structural strength of the front floor support assembly 301, thereby improving the reliability of the front floor assembly 3.

[0073] Preferably, the front floor front cross beam assembly 3011 and the front floor rear cross beam assembly 3013 are made of steel thermoformed material to have higher strength. The front floor assembly 3 and the rear floor assembly 4 are assembled and connected by spot welding, sealant and other connection methods.

[0074] In some embodiments of the present application, the lower body assembly also includes a front cabin reinforcement assembly 8, which is respectively assembled and connected to the shock tower assembly 203 and the front panel assembly 202 to form a support. The front cabin reinforcement assembly 8 can effectively enhance the structural integrity of the shock tower assembly 203 and the front panel assembly 202, and improve the connection reliability of the front support body 201 and the front panel assembly 202.

[0075] Among them, Fig.15 As shown, both sides of the front cabin reinforcement assembly 8 in the vehicle width direction are respectively connected to the corresponding shock tower assemblies 203, and the rear side of the front cabin reinforcement assembly 8 in the vehicle length direction is connected to the front panel assembly 202. This form of the front cabin reinforcement assembly 8 has a triangular structure as a whole, which can effectively enhance local stability.

[0076] In addition, if Fig.15 As shown, the front cabin reinforcement assembly 8 itself can also serve as a mounting seat for other components. The components inside the front cabin of the vehicle can be connected to the preset positions of the front cabin reinforcement assembly 8 and then assembled to the front cabin, which makes it easier to install the components in the front cabin.

[0077] Preferably, the front cabin reinforcement assembly 8 is formed by integrally casting an aluminum alloy, which can reduce the weight and simplify its own structure; the front cabin reinforcement assembly 8 is connected to the corresponding components by bolts.

[0078] In some embodiments of the present application, the lower body assembly also includes a front cabin front cross beam assembly 9, which is arranged at a position of the front cabin front cross beam assembly 9 close to the front side of the front support body 201 in the length direction of the vehicle. The front cabin front cross beam assembly 9 is detachably connected to the front support body 201, and the front cabin front cross beam assembly 9 has a box mounting position for installing a storage box. Since the front cabin front cross beam assembly 9 is detachable, when used in a pure electric vehicle model, the front cabin front cross beam assembly 9 can be used to carry the storage box on the front side of the vehicle. When used in an extended-range vehicle model, it can be disassembled to free up installation space for corresponding structural parts such as the range extender. The components are simple and reliable and have strong flexibility in use.

[0079] like Fig.16 As shown, the front cross beam assembly 9 of the front cabin extends along the width direction of the vehicle, and both ends of the front cross beam assembly 9 along the width direction of the vehicle are respectively assembled and connected with the front support body 201.

[0080] Preferably, the front cross beam assembly 9 of the front cabin is made of aluminum alloy profiles, and the front cross beam assembly 9 of the front cabin is assembled and connected to the front support body 201 by bolts.

[0081] In some embodiments of the present application, the number of front support bodies 201 is two and they are spaced apart along the width direction of the vehicle. The front support body 201 includes a front cabin longitudinal beam assembly 2011, a shock tower reinforcement assembly 2012 and a front cabin upper side beam assembly 2013. The front cabin longitudinal beam assembly 2011, the shock tower reinforcement assembly 2012, the front cabin upper side beam assembly 2013 and the front cabin longitudinal beam assembly 2011 are sequentially connected and enclosed to form a shock tower mounting position. The shock tower assembly 203 is arranged at the corresponding shock tower mounting position. The shock tower assembly 203 is assembled and connected with the front cabin longitudinal beam assembly 2011, the shock tower reinforcement assembly 2012 and the front cabin upper side beam assembly 2013, respectively. This form of front support body 201 has a reliable structure and can provide good support for the shock tower assembly 203.

[0082] Among them, Figures 3 to 6 As shown, the front cabin longitudinal beam assembly 2011, the shock tower reinforcement assembly 2012 and the front cabin upper side beam assembly 2013 are respectively assembled and connected to the front panel assembly 202, so that each position of the periphery of the shock tower assembly 203 can be effectively fixed, thereby improving the installation stability of the shock tower assembly 203.

[0083] In addition, the front support body 201 is assembled and connected with the front panel assembly 202 and the front floor assembly 3 at the same time, and the two ends of the front cabin front cross beam assembly 9 are respectively assembled and connected with the corresponding front cabin longitudinal beam assembly 2011.

[0084] Preferably, the front support body 201 is connected to the front floor assembly 3 by spot welding.

[0085] In the related art, in the pure electric configuration and extended-range configuration of the same vehicle model, the lower body assembly usually needs to be equipped with an adapted pure electric drive interface or range extender drive interface according to the corresponding configuration settings. The lower body structures used in the two configurations are different. The difference in such adaptation structure will cause the lower body assembly to be differentiated and the structure to be more complicated.

[0086] In some embodiments of the present application, a mounting component 20111 for suspending and installing the range extender is provided on the front cabin longitudinal beam assembly 2011. This type of front cabin longitudinal beam assembly 2011 can be adapted to pure electric configuration components and can also be installed with range extender configuration components, which greatly improves the flexibility of use of the front cabin longitudinal beam assembly 2011 and allows the same front cabin longitudinal beam assembly 2011 to be applied to vehicles with two configurations.

[0087] Among them, it should be noted that the range extender suspension is the suspension system of the extended-range vehicle.

[0088] Specifically, Figure 5As shown, the installation component 20111 is located in the middle of the front cabin longitudinal beam assembly 2011, and there are multiple installation components. The specific structural form and quantity of the installation components 20111 are not specifically limited and can be selected according to the installation requirements of the corresponding suspension system.

[0089] In some embodiments of the present application, a plurality of energy absorbing holes 20112 are provided on the front cabin longitudinal beam assembly 2011. The energy absorbing holes 20112 are arranged at intervals along the length direction of the vehicle. The energy absorbing holes 20112 can be compressed and deformed when a collision occurs on the front side of the front cabin longitudinal beam assembly 2011, thereby absorbing the energy of the collision and reducing the impact on the passengers in the vehicle.

[0090] Specifically, Figure 5 As shown, there is no limitation on the number and shape of the energy absorbing holes 20112. The energy absorbing hole 20112 may be one or more. The energy absorbing hole 20112 may be circular, elliptical, strip-shaped, etc., as long as it can absorb the energy during the collision.

[0091] In some embodiments of the present application, the front cabin assembly 2 also includes an A-pillar inner panel assembly 204 arranged on both sides of the front panel assembly 202. The A-pillar inner panel assembly 204 is respectively assembled and connected to the front panel assembly 202 and the front support body 201. The structure is simple and reliable and easy to process and manufacture.

[0092] Among them, the A-pillar inner panel assembly 204 is preferably made of steel thermoformed material, which has high structural strength, is not easy to deform, and can better protect the passengers in the car.

[0093] Preferably, the A-pillar inner panel assembly 204 , the front wall panel assembly 202 and the front support body 201 are connected by spot welding.

[0094] In some embodiments of the present application, the front collision beam assembly 1 is an aluminum alloy profile structural member, and the front collision beam assembly 1 has at least one energy absorption cavity 101 extending along the width direction of the vehicle. The front collision beam assembly 1 is lighter in weight and can also provide better collision crush energy absorption effect.

[0095] Specifically, Fig.13 and Fig.14 As shown, the front collision beam assembly 1 itself is welded from aluminum alloy profiles by double welding. The cross section of the energy absorption cavity 101 of the front collision beam assembly 1 is in the shape of a "sun", which can meet the required supporting capacity and effectively absorb crushing energy.

[0096] In addition, preferably, the front collision beam assembly 1 is assembled and connected to the front cabin longitudinal beam assembly 2011 by bolts.

[0097] In some embodiments of the present application, the rear floor front support assembly 402 includes a rear floor front cross beam assembly 4021 and a rear floor upper panel assembly 4022. The rear floor support body 401 has a panel mounting position 4011 for installing the rear floor panel assembly 4022. The rear floor front cross beam assembly 4021 extends along the width direction of the vehicle. The rear floor front cross beam assembly 4021 is assembled and connected to the rear floor support body 401 and the rear floor upper panel assembly 4022, respectively. The rear floor front cross beam assembly 4021 and the rear floor upper panel assembly 4022 can form a reliable and effective support structure on the front side of the rear floor support body 401 in the vehicle length direction, both along the vehicle length direction and the width direction.

[0098] In some embodiments of the present application, the rear floor edge support assembly 403 includes a front hub assembly connection assembly 4032 and a rear hub assembly connection assembly 4033. The front hub assembly connection assembly 4032 is arranged on both sides of the middle of the rear floor support body 401, and the rear hub assembly connection assembly 4033 is arranged on both sides of the middle of the rear floor support body 401. The structure is simple and reliable, and a high-strength support structure can be formed at the position of the rear floor support body 401 corresponding to the wheel hub.

[0099] Preferably, the various components in the rear floor assembly 4 are reliably connected through self-piercing riveting technology (Self-Piercing Riveting SPR), bolt automatic tightening technology (Flow Drill Screw FDS), structural adhesive and bolt connection, which can ensure that the connection strength and tightening force of each part meet the preset requirements and ensure the assembly stability of the rear floor assembly 4.

[0100] In this embodiment, the rear collision beam assembly 6 is made of an aluminum alloy profile; the rear collision beam assembly 6 is assembled and connected to the rear apron panel assembly 5 and the rear floor assembly 4 through bolt and nut assemblies, and the corresponding parts of the rear apron panel assembly 5 and the rear floor assembly 4 are assembled through spot welding and sealant.

[0101] According to an embodiment of the present application, on the other hand, a vehicle is provided, comprising:

[0102] The above-mentioned lower body assembly and upper body assembly, the upper body assembly and the lower body assembly are assembled and connected.

[0103] It should be noted that the vehicle in this application may refer to a large car, a small car, a special-purpose car, etc. For example, according to the car model, the car in this application may be a sedan, an off-road vehicle, a multi-purpose vehicle (MPV) or other models. Generally, a vehicle is provided with wheels, a power source, and a transmission system arranged between the wheels and the power source. The transmission system can transmit the power provided by the power source to the wheels, so that the wheels rotate, thereby driving the vehicle to travel.

[0104] It should be noted that in the embodiments of the present application, the type of the power source of the vehicle is not limited. For example, for a fuel vehicle, the power source may refer to a fuel engine such as a gasoline engine or a diesel engine; for an electric vehicle, the power source may refer to an electric motor; for a hybrid vehicle, the power source may refer to an engine or an electric motor; for a vehicle powered by other means, the power source may refer to a device that generates power.

[0105] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A lower vehicle body assembly, characterized in that: The vehicle comprises a front collision beam assembly (1), a front cabin assembly (2), a front floor assembly (3), a rear floor assembly (4), a rear apron assembly (5) and a rear collision beam assembly (6) which are sequentially connected from front to rear along the length direction of the vehicle; The front collision beam assembly (1) and the rear collision beam assembly (6) are aluminum alloy components; The front floor assembly (3) and the rear apron assembly (5) are steel structural parts; The front cabin assembly (2) comprises a front support body (201), a front panel assembly (202) and a shock tower assembly (203); the front support body (201) is connected to the front collision beam assembly (1) and the front floor assembly (3) respectively; the front panel assembly (202) and the shock tower assembly (203) are arranged on the front support body (201); the front support body (201) is a steel structure; and the shock tower assembly (203) is an aluminum alloy component; The rear floor assembly (4) comprises a rear floor support body (401), a rear floor front support assembly (402), a rear floor edge support assembly (403), a rear floor rear support assembly (404) and a rear floor longitudinal beam assembly (405); the rear floor front support assembly (402) is arranged at the front part of the rear floor support body (401) in the vehicle length direction; the rear floor rear support assembly (404) is arranged at the rear part of the rear floor support body (401) in the vehicle length direction; the rear floor edge support assembly (403) is arranged at both sides of the rear floor support body (401) in the vehicle width direction; the rear floor longitudinal beam assembly (405) is arranged at the rear floor rear support assembly (404); the rear floor support body (401) and the rear floor longitudinal beam assembly (405) are aluminum alloy components; the rear floor front support assembly (402), the rear floor edge support assembly (403) and the rear floor rear support assembly (404) are steel structural components.

2. The lower vehicle body assembly according to claim 1, characterized in that: The front panel assembly (202) includes an upper panel (2021) and a lower panel (2022), wherein the upper panel (2021) is assembled and connected to the lower panel (2022), and both are assembled and connected to the front support body (201) and the front floor assembly (3) respectively, and the lower panel (2022) has a mating surface (2023) that cooperates with the operating pedal, and the mating surface (2023) is symmetrically arranged along the center line in the width direction of the vehicle.

3. The lower vehicle body assembly according to claim 1, characterized in that: The front floor assembly (3) comprises a front floor support assembly (301) and a front door sill (302), wherein the front door sill (302) is arranged on both sides of the front floor support assembly (301) in the vehicle width direction; the rear floor edge support assembly (403) comprises a rear door sill (4031), wherein the rear door sill (4031) is arranged on both sides of the rear floor support body (401) in the vehicle width direction; the lower body assembly further comprises a door sill reinforcement assembly (7), wherein the door sill reinforcement assembly (7) extends along the length direction of the vehicle, and the door sill reinforcement assembly (7) is respectively assembled and connected with the corresponding front door sill (302) and the rear door sill (4031).

4. The lower vehicle body assembly according to claim 3, characterized in that: The door sill reinforcement assembly (7) is an aluminum alloy component. And / or, the front floor support assembly (301) comprises a front floor front cross beam assembly (3011), a front floor panel body (3012) and a front floor rear cross beam assembly (3013), the front floor front cross beam assembly (3011) is assembled and connected with the front floor rear cross beam assembly (3013), and both are assembled and connected with the front floor panel body (3012) at the same time, the front floor front cross beam assembly (3011) has a first cross beam (3014) and a second cross beam (3015) arranged along the length direction of the vehicle, and the front floor rear cross beam assembly (3013) has a third cross beam (3016) and a fourth cross beam (3017) arranged along the length direction of the vehicle.

5. The lower vehicle body assembly according to any one of claims 1 to 4, characterized in that: The lower vehicle body assembly further comprises a front cabin reinforcement assembly (8), wherein the front cabin reinforcement assembly (8) is respectively assembled and connected with the shock tower assembly (203) and the front wall assembly (202) to form a support. And / or, the lower vehicle body assembly further comprises a front cabin front cross beam assembly (9), the front cabin front cross beam assembly (9) being arranged at a position close to the front side of the front support body (201) in the length direction of the vehicle, the front cabin front cross beam assembly (9) being detachably connected to the front support body (201), and the front cabin front cross beam assembly (9) having a box mounting position for mounting a storage box.

6. The lower vehicle body assembly according to any one of claims 1 to 4, characterized in that: The number of the front support bodies (201) is two and they are arranged at intervals along the width direction of the vehicle. The front support bodies (201) include a front cabin longitudinal beam assembly (2011), a shock tower reinforcement assembly (2012) and a front cabin upper side beam assembly (2013). The front cabin longitudinal beam assembly (2011), the shock tower reinforcement assembly (2012), the front cabin upper side beam assembly (2013) and the front cabin longitudinal beam assembly (2011) are sequentially connected to enclose a shock tower installation position. The shock tower assembly (203) is arranged at the corresponding shock tower installation position. The shock tower assembly (203) is respectively assembled and connected with the front cabin longitudinal beam assembly (2011), the shock tower reinforcement assembly (2012) and the front cabin upper side beam assembly (2013).

7. The lower vehicle body assembly according to claim 6, characterized in that: The front cabin longitudinal beam assembly (2011) is provided with a mounting component (20111) for suspending and mounting the range extender. And / or, the front cabin longitudinal beam assembly (2011) is provided with a plurality of energy absorbing holes (20112), and the energy absorbing holes (20112) are arranged at intervals along the length direction of the vehicle.

8. The lower vehicle body assembly according to any one of claims 1 to 4, characterized in that: The front cabin assembly (2) further comprises an A-pillar inner panel assembly (204) arranged on both sides of the front panel assembly (202), wherein the A-pillar inner panel assembly (204) is respectively assembled and connected to the front panel assembly (202) and the front support body (201). And / or, the front impact beam assembly (1) is an aluminum alloy profile structural component, and the front impact beam assembly (1) has at least one energy absorption cavity (101) extending along the width direction of the vehicle.

9. The lower vehicle body assembly according to any one of claims 1 to 4, characterized in that: The rear floor front support assembly (402) comprises a rear floor front cross beam assembly (4021) and a rear floor upper panel assembly (4022); the rear floor support body (401) has a panel mounting position (4011) for mounting the rear floor upper panel assembly (4022); the rear floor front cross beam assembly (4021) extends along the width direction of the vehicle; the rear floor front cross beam assembly (4021) is respectively assembled and connected to the rear floor support body (401) and the rear floor upper panel assembly (4022); And / or, the rear floor edge support assembly (403) includes a wheel hub package front connection assembly (4032) and a wheel hub package rear connection assembly (4033), wherein the wheel hub package front connection assembly (4032) is arranged on both sides of the middle part of the rear floor support body (401), and the wheel hub package rear connection assembly (4033) is arranged on both sides of the middle part of the rear floor support body (401).

10. A vehicle, characterized in that: include: The lower body assembly according to any one of claims 1 to 9; The upper vehicle body assembly is assembled and connected with the lower vehicle body assembly.

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