Central floor and vehicle using same

Abstract

The utility model provides a central floor and a vehicle using the same. The central floor for the vehicle comprises a pair of side edge sills which are parallel to each other in a spaced mode and extend in the first direction serving as the length direction of the vehicle. And a beam assembly located between the pair of side sills in a second direction, which is a width direction of the vehicle, the side sills of the center floor and the beam assembly are integrally formed, and the center floor is a die-cast body of an aluminum alloy.

Description

TECHNICAL FIELD

[0001] The utility model relates to a central floor formed by integrated die casting process and a vehicle using the same, which is especially suitable for the battery body integration design of electric vehicles and can also be used to improve the performance of internal combustion engine vehicles. BACKGROUND

[0002] With the rapid popularization of the Cell to Body (CTB) technology in electric vehicles, the central floor (CTR FLR) as a key integrated carrier of the vehicle body and the battery pack directly affects the vehicle sealing, assembly efficiency and collision safety in terms of structure design and manufacturing process. In the traditional manufacturing process, the central floor is usually in the form of a central floor assembly composed of multiple components, that is, multiple separately formed metal components (such as longitudinal beams, cross beams, panels, etc.) are assembled on the factory welding line. However, this process has the following significant problems: (1) each component needs to rely on an independent die for stamping forming, resulting in a large number of types and quantities of dies, which not only greatly increases the cost of tooling fixtures, but also requires a large amount of factory space for die storage and production line layout. In addition, the multi-process welding process prolongs the production cycle and restricts the improvement of mass production efficiency; (2) due to the cumulative tolerances of the machining and welding of the assembled surfaces of the split components, the flatness of the central floor assembly is difficult to accurately control, resulting in insufficient joint surface sealing when the battery pack is installed, affecting the vehicle waterproof performance and battery protection reliability. At the same time, the strength weakening problem of the welding seams will reduce the overall stiffness of the vehicle body, which is prone to cause local deformation in the collision condition and is difficult to meet the integrated mechanical performance requirements of the CTB technology for high-integration structures; (3) the current industry highly pursues the high integration design of the battery and the vehicle body. The traditional multi-component welding process has gradually become a bottleneck for lightweight and high-precision manufacturing due to problems such as structural redundancy and excessive connection points, and an integrated central floor solution that can balance low cost, high efficiency and high performance is urgently needed. SUMMARY

[0003] The utility model aims at providing a central floor formed by integrated die casting process and a vehicle using the same, which can reduce the number of parts, reduce the cost of molds and tooling, eliminate assembly tolerances, improve battery sealing, improve vehicle body stiffness and collision safety, and adapt to the CTB and CTC (Cell to Chassis) technology trends, optimize the endurance and maintenance convenience of electric vehicles. In addition, such a structure can also improve fuel efficiency and other performance when used in internal combustion engine vehicles.

[0004] To achieve the above objectives, the first aspect of the present invention provides a central floor for a vehicle, the central floor comprising: a pair of parallel side sills spaced apart from each other, the side sills extending along a first direction which is the length direction of the vehicle; and a beam assembly located between the pair of side sills in a second direction which is the width direction of the vehicle, the side sills and the beam assembly of the central floor being integrally formed, the central floor being a die-cast body of aluminum alloy.

[0005] As mentioned above, when the central floor of the vehicle chassis adopts a multi-component welded central floor assembly, there are various problems such as a large number of parts, high manufacturing cost, cumulative tolerance affecting battery sealing and assembly accuracy, and low production efficiency.

[0006] In this embodiment of the invention, the central floor is manufactured using a large-scale integrated die-casting process with aluminum alloy, allowing approximately 20 components to be combined into a single part. This reduces the costs of molds, fixtures, and welding robots used in multi-component assembly, thus lowering the overall cost. Furthermore, since this integrated die-cast central floor is a single component, there are no assembly errors, and dimensional tolerances are reduced, which improves flatness and consequently enhances battery sealing performance and assembly accuracy with other devices. Moreover, the use of lightweight aluminum alloy reduces overall weight and improves the formability of the integrated die-casting process. This weight reduction not only increases the driving range of electric vehicles but also improves fuel efficiency in internal combustion engine vehicles.

[0007] In some embodiments, the beam assembly includes a plurality of longitudinal beams extending along a first direction and a plurality of transverse beams extending along a second direction, with reinforcing supports provided at locations where one or more transverse beams are connected to a side sill.

[0008] By forming the beam assembly into a grid structure with multiple crossbeams and longitudinal beams, impact forces can be effectively dispersed and absorbed, improving the chassis's torsional and bending resistance, enhancing overall strength, and also helping to evenly distribute weight and improve vehicle balance. Furthermore, the intersecting design of the crossbeams and longitudinal beams increases the rigidity of the vehicle chassis, reduces deformation, and improves vehicle handling and stability. In the event of a collision, the grid structure better absorbs and disperses impact forces, improving vehicle safety. Moreover, this structural design offers high flexibility, allowing for designs tailored to different vehicle models to meet diverse needs. Furthermore, by placing reinforcing brackets at the connection points between the crossbeams and side sills, mounting points for various devices such as seats can be installed, and the connection strength between the side sills and crossbeams can be increased, thereby enhancing the overall rigidity of the central floor.

[0009] In some embodiments, the beam assembly includes a plurality of inclined beams that are tilted relative to a first direction and a second direction.

[0010] By incorporating inclined beams, a stable triangular structure can be formed between the inclined beams, crossbeams, and longitudinal beams, thereby further enhancing the rigidity and strength of the entire chassis and improving the vehicle's overall stability and torsional resistance. Furthermore, the grid structure with inclined beams can better distribute and transmit external loads (such as collision impact forces and vibrations transmitted from the suspension) to the vehicle body, further improving the vehicle's resistance to deformation. Additionally, incorporating inclined beams allows for better utilization of chassis space and more flexible design of the placement of components such as batteries.

[0011] In some embodiments, the battery can be assembled on the bottom surface of the central floor facing the ground. The bottom surfaces of the multiple sealing beams in the beam assembly for sealing the battery form a battery sealing plane. Battery sealant is provided around the battery. By attaching the battery sealant to the battery sealing plane, the central floor and the battery can be sealed.

[0012] In this embodiment, the central floor is formed by a one-piece die-casting process, meaning the central floor is a single component. Therefore, even the planes of multiple sealing beams have the same forming precision, and the resulting consistency of the battery sealing plane can further improve the battery's sealing performance.

[0013] In some embodiments, stiffeners are formed in the beam assembly and side sills. This improves the torsional and bending stiffness of the central floor, optimizing collision safety.

[0014] In some embodiments, the sealing beam in the beam assembly has reinforcing ribs formed on its top surface, and the beams in the beam assembly other than the sealing beam have reinforcing ribs formed on their bottom surfaces. Since the battery is assembled on the battery sealing plane located on the bottom surface of the beam assembly, reinforcing ribs can be formed on the top surface of the sealing beam used to seal the battery, while the beams in the beam assembly other than the sealing beam can form mounting planes on their top surfaces for mounting other vehicle devices, thus reinforcing ribs can be formed on their bottom surfaces. This allows for efficient use of the space in the central floor to accommodate other vehicle devices, while simultaneously improving the overall rigidity and collision safety of the central floor.

[0015] In some embodiments, the cross-section of the stiffener cut at a plane perpendicular to the die-casting direction is H-shaped. Thus, by forming the stiffener into a grid shape, multiple rigid units can be created, distributing torsional stress, reducing overall structural deformation, and enhancing load-bearing capacity in the bending direction, while reducing deformation caused by vertical loads. Furthermore, such a stiffener structure can absorb impact energy through deformation during a vehicle collision, while simultaneously dispersing impact loads through multi-path force transmission, preventing fractures caused by localized stress concentration. This stiffener structure maintains high rigidity and impact resistance while reducing material usage.

[0016] In some embodiments, a battery mounting point for mounting the battery is formed at the bottom of the beam assembly, and the battery can be integrally disassembled relative to the central floor.

[0017] Thus, in the electric vehicle, the battery is assembled to the central floor by mounting using a fixing member (e.g., a screw, a bolt) and sealing using a sealant. Since the connection strength of the battery and the vehicle chassis can be improved, the stability and the impact resistance of the chassis as a whole in the CTB and CTC structures can be improved. Moreover, since other devices of the vehicle are not mounted in the battery, the battery can be integrally disassembled relative to the central floor. This is beneficial to post-sale maintenance and battery replacement, and can improve the durability of the vehicle as a whole.

[0018] In some embodiments, a reinforcing mechanism is provided at the battery mounting point. By providing the reinforcing mechanism at the battery mounting point, the battery can be firmly fixed, displacement or damage of the battery can be avoided when the vehicle is rapidly accelerated, rapidly braked, or collides, and the stability, impact resistance, and safety of the battery can be ensured. Such a reinforcing mechanism can also inhibit the transmission of vibration between the battery and the chassis, reduce the influence of vibration on the internal structure of the battery, and prolong the service life of the battery. In order to ensure a large driving distance, the battery pack of the electric vehicle is usually heavy, and the reinforcing mechanism of the battery mounting point can provide additional support to prevent the chassis from being deformed or fatigued due to excessive weight of the battery.

[0019] In some embodiments, the battery mounting point is provided only on the side sills. The cross beams and the longitudinal beams of the central floor need to bear various loads and functions, and by providing the battery mounting point entirely on the side sills, the structural design of the central floor can be simplified, and the manufacturing difficulty and cost can be reduced. Moreover, the thickness of the side sills is larger than that of the central floor, and the rigidity is high, which can provide better support and protection for the battery, and reduce the influence of vibration and impact on the battery. Moreover, the side sills are located at the outermost side of the vehicle in the width direction of the central floor, and thus the battery mounting point provided here is easier to access, facilitating the maintenance and replacement of the battery, and will not interfere with the structure of the central floor when the battery is mounted and dismounted, and can adapt to the battery mounting of different vehicle models.

[0020] The second aspect of the present application provides a vehicle, the chassis of which has the above-mentioned central floor, and a front floor and a rear floor connected to the central floor in the length direction of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a perspective view of a central floor of a vehicle according to an embodiment of the present application.

[0022] Figure 2 In some embodiments, (a) is a plan view of the state in which the central floor is mounted on the vehicle chassis according to an embodiment of the present application, and (b) is a schematic view of a battery that can be mounted on the central floor.

[0023] Figure 3 Fig. (a) is a top view of a central floor of an embodiment of the present application, (b) is a bottom view of the central floor, (c) is a front view of the central floor, and (d) is a side view of the central floor.

[0024] Figure 4 Fig. is a schematic view of a reinforcement structure of a battery mounting point of a central floor of an embodiment of the present application.

[0025] Figure 5 Fig. is a diagram showing a flow of a mounting process of a central floor and a battery of an embodiment of the present application.

[0026] Figure 6 Fig. is a schematic view of a battery mounting point of a central floor of another embodiment of the present application.

[0027] Figure 7 Fig. is a shape design diagram of a beam assembly of a central floor of another embodiment of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1 central floor; 10 vehicle chassis; 11 side sill; 12 beam assembly; 2 rear floor; 3 front floor; 4, 5, 6 reinforcement bracket; 7 reinforcement rib; 121, 122, 123 cross beam; 124, 125, 126, 127 sealing beam; 128 inclined beam; 20 battery; 21 battery sealant; A battery mounting area; B battery sealing plane; 22 battery mounting point; 23 reinforcement wall; 24 boss; Y first direction; X second direction; Z third direction. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the embodiments of the present application will be described below in conjunction with the drawings, and the described embodiments are only examples and should not be understood as limiting. The scope of protection of the present application includes all variations and modifications without departing from the main idea of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application in the specification are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" in the specification and the above drawing description of the present application are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and the above drawing description of the present application are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0032] The utility model discloses a vehicle based on the preferred embodiment thereof, which will be described below with reference to the accompanying drawings. In the following description of the drawings, the same or similar parts are marked with the same or similar reference numerals. The drawings are basically schematic illustrations, and the proportions of various dimensions and the like are different from the actual proportions.

[0033] The vehicle in the utility model includes electric vehicles and fuel vehicles, wherein the electric vehicles include pure electric vehicles that only use rotary motors to travel and hybrid electric vehicles that use both engines and rotary motors to travel.

[0034] As described above, in the electric vehicle, when the central floor assembly is made of multiple components, there is room for improvement in terms of waterproofness, ease of assembly, rigidity, collision resistance, and other properties.

[0035] To this end, the inventors of the utility model have proposed a central floor formed by an integrated die casting process and a vehicle using the same. Such a structure can be applied to the CTB design of electric vehicles, can reduce the number of components, reduce the cost of molds and tooling, eliminate assembly tolerances, improve battery sealing, and improve the rigidity and collision safety of the vehicle body. In addition, such a structure can also improve fuel efficiency and other properties when used in internal combustion engine vehicles.

[0036] In addition, the material used in the integrated die casting process of the central floor must meet the requirements of lightweight, high toughness, die casting formability, and cost control. Aluminum alloy has excellent fluidity, can meet the requirements of integrated die casting of large thin-walled complex structures, and has low density and high specific strength, which can significantly reduce the weight while ensuring the structural rigidity. Therefore, the inventors of the utility model prefer to use aluminum alloy materials with excellent die casting process adaptability to form the central floor.

[0037] The specific scheme of the utility model will be described in detail below based on the drawings.

[0038] Figure 1 is a perspective view of a central floor for a vehicle according to an embodiment of the utility model.

[0039] In the following description, the front-rear direction of the vehicle is referred to as the Y direction (first direction), the left-right direction of the vehicle is referred to as the X direction (second direction), and the up-down direction of the vehicle is referred to as the Z direction (third direction). The X direction, the Y direction, and the Z direction are orthogonal to each other. In addition, the direction indicated by the arrow in the drawing among the directions is referred to as the positive side, and the opposite direction is referred to as the negative side. Furthermore, the designations of these directions are for the purpose of describing the relative positional relationship of the constituent elements in the drawing, or the orientation or positional relationship in which the product is usually placed when used, and are merely for the purpose of facilitating the description and simplifying the description, and therefore cannot be construed as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0040] The center floor 1 is formed by an integrated die casting process using an aluminum alloy, as shown in Figure 1 The center floor 1 includes two side sills 11 spaced apart at intervals and extending in the Y direction (i.e., the lengthwise direction of the vehicle), and a beam assembly 12 located therebetween, as shown in

[0041] Figure 2 In the drawings, (a) is a plan view of the state in which the center floor according to an embodiment of the present application is installed in a vehicle chassis, and (b) is a schematic view of a battery that can be installed in the center floor.

[0042] As shown in (a) of Figure 2 The vehicle chassis 10 is provided with a center floor 1, a rear floor 2, and a front floor 3 in the lengthwise direction (i.e., the Y direction), as shown in (a) of Figure 2 In the drawings, (a) is a plan view of the state in which the center floor according to an embodiment of the present application is installed in a vehicle chassis, and (b) is a schematic view of a battery that can be installed in the center floor. Figure 2 The intersection of one or more crossbeams (three crossbeams 121, 122, 123 in (a) of Figure 2 The intersection of one or more crossbeams (three crossbeams 121, 122, 123 in (a) of

[0043] As shown in (b) of Figure 2 The battery 20 can be installed in the battery installation region A of the center floor 1, as shown in (b) of Figure 2(represented by dotted areas in (a)) The battery mounting area A is formed by multiple beams surrounding the beam assembly 12. The battery 20 can be detached and installed entirely relative to the vehicle chassis 10, facilitating after-sales service and maintenance. Therefore, no other vehicle components are assembled on the battery 20; that is, the battery 20 is mounted at the battery mounting point on the vehicle chassis, but no mounting points for other vehicle components are provided. Figure 2 The diagram in (b) illustrates battery sealant 21, which surrounds the battery and... Figure 3 The range of the battery mounting area A in (a) is matched so that, with the battery 20 mounted on the central floor 1, the battery sealant 21 is attached to the multiple sealing beams in the beam assembly 12 for sealing the battery 20, thereby ensuring the seal between the battery 20 and the central floor 1 and preventing external substances such as moisture from entering the battery area.

[0044] Figure 5 In the diagram, (a) is a top view of the central floor according to an embodiment of the present invention, (b) is a bottom view of the central floor, (c) is a front view of the central floor, and (d) is a side view of the central floor.

[0045] As follows Figure 3 As shown, battery 20 is assembled on the bottom surface (lower surface in the Z direction) of central floor 1, that is, the side of central floor 1 facing the ground. Therefore, as Figure 3 As shown in (b), the bottom surfaces of the plurality of sealing beams 124-127 in the beam assembly 12 used to seal the battery 20 are formed into the same plane, that is, the bottom surfaces of the plurality of sealing beams 124-127 form the battery sealing plane B. The installation positions of the sealing beams correspond to the installation positions of the battery sealant 21, for example, in Figure 3 In (a) and (b), the two outermost longitudinal beams 124 and 125 in the ±X direction and the two outermost transverse beams 126 and 127 in the ±Y direction are represented in the beam assembly 12. However, the location of the sealing beam is not limited to this. It can be designed based on the location of the battery 20, as long as the battery sealing plane B of the sealing beam can be used to seal the battery 20 with the adhesion of the battery sealant 21.

[0046] Reinforcing ribs 7 are formed on the top surface (upper surface in the Z direction) of these sealing beams 124-127. The reinforcing ribs 7, respectively provided in the sealing beams 124-127, extend continuously along the length of the corresponding sealing beam and are integrally provided throughout the corresponding sealing beam. Figure 3The structure in which the length of the X direction and the Y direction of each of the reinforcing ribs 7 is the same as the length of the two directions of the beam in which it is provided is shown in (a) and (b). The present embodiment is not limited to this, and the provided length and width of the reinforcing ribs 7 can be adjusted according to design requirements. However, from the viewpoint of further improving the rigidity and impact resistance of the beam in which the reinforcing ribs 7 are provided and the ease of die casting processing, the reinforcing ribs 7 are preferably provided in the manner shown in the drawing throughout the corresponding beam. Based on this structure, the battery 20 can be sealed using the battery sealing plane B formed on the bottom surface (lower surface in the Z direction), and the rigidity and impact resistance of the beam can be improved using the reinforcing ribs 7 formed on the top surface.

[0047] In addition, the beams other than the sealing beams 124 to 127 in the beam assembly 12 can have a flat top surface and reinforcing ribs 7 formed on the bottom surface, and the reinforcing ribs 7 here can also be provided in the manner in which the length of the X direction and the Y direction of each of the reinforcing ribs 7 is the same as the length of the two directions of the corresponding beam. Thus, the mounting of each device of the vehicle can be performed using the flat surface formed on the top surface of the beam, and the rigidity and impact resistance of the beam can be improved using the reinforcing ribs 7. In addition, as shown in the front view of (c) and the side view of (d) of the present embodiment and the perspective view of (e), reinforcing ribs 7 extending in the Y direction are formed on the side sills 11 (for example, the X direction outer side surfaces) in addition to the beam assembly 12. Thus, the rigidity and impact resistance of the side sills 11 and the entire central floor 1 can be improved. Figure 3 Figure 1 Figure 3 As shown in the front view of (c) and the side view of (d) of the present embodiment and the perspective view of (e), reinforcing ribs 7 extending in the Y direction are formed on the side sills 11 (for example, the X direction outer side surfaces) in addition to the beam assembly 12. Thus, the rigidity and impact resistance of the side sills 11 and the entire central floor 1 can be improved.

[0048] In each of the drawings, a reinforcing rib 7 using a "sun" shaped cross section (a cross section obtained by cutting a perpendicular plane to the die casting direction) is shown, and such a reinforcing rib 7 forms a plurality of rigid units through its mesh-like geometry, can disperse torsional stress, reduce the deformation of the overall structure, thereby protecting the sealability of the battery, and can increase the load capacity of the material in the bending direction and reduce the deformation due to the vertical load. Furthermore, the structure of such a reinforcing rib 7 can absorb impact energy through deformation when the vehicle collides, and at the same time, disperse the impact load through multi-path force transmission, thereby preventing rupture due to local stress concentration. In addition, by using a mesh-like reinforcing member, compared to a reinforcing method in which the wall thickness is thickened throughout, the amount of material can be reduced while maintaining high rigidity and impact resistance. Furthermore, since the present application uses an aluminum integrated die casting manufacturing process, a complex reinforcing rib structure can be formed simply at one time. The reinforcing rib 7 of the present embodiment is not limited to the shape shown in the drawing, and can have other mesh structures, but from the viewpoint of achieving good resistance to deformation, impact resistance, and ease of die casting, a reinforcing rib structure having a "sun" shaped cross section is preferably used.

[0049] ​​In addition, according to requirements, the central floor 1 can be formed with a demolding angle, and the demolding angle of each plane can be determined according to mold manufacturing and production requirements, etc., for example, 3°. Thus, the deformation or scratch caused by difficult demolding can be reduced, thereby helping to ensure one-time forming and quality stability of large and complex castings.

[0050] As shown in (a) and (b) of Figure 4 The pressing direction of the side sill 11 on both sides and the reinforcing rib 7 arranged thereon is the width direction of the vehicle, denoted as ±X direction in the figure, and the pressing direction of the beam assembly 12 of the central floor 1 and the reinforcing rib 7 arranged thereon is the height direction H of the vehicle, denoted as ±Z direction in the figure.

[0051] Figure 4 is a schematic view of the reinforcing structure of the battery mounting point in the central floor of an embodiment of the utility model, (a) indicates the battery mounting point in the side view of the central floor, (b) indicates the battery mounting point in the bottom view of the central floor, (c) is the enlarged view of C part of (a), (d) is the enlarged view of D part of (b), (e) is the enlarged view of E part of (b).

[0052] The connection strength of the battery and the chassis in the vehicle can greatly affect the sealing, collision safety and durability of the vehicle, therefore, in order to avoid fatigue cracking of the mounting point of the battery and the chassis caused by stress concentration, and ensure the stability of the battery when collision occurs, the structure of the battery mounting point is preferably locally reinforced. Figure 4 The C part, D part and E part shown in (a)-(e) of

[0053] Figure 4 In (b) of, the D part is the battery mounting point 22 arranged on the side sill 11, and the battery 20 can be mounted on the central floor 1 by using a fixing component such as a screw or a bolt at this position. Figure 4 In (a) of, the C part is the representation of the battery mounting point 22 of the D part in the side view, as shown in the enlarged view of the C part and the D part, a cylindrical reinforcing wall 23 (a cylindrical reinforcing wall 23 with a cross section of a substantially semicircle is shown in the figure) is formed around the battery mounting point 22 to increase its strength and rigidity. Figure 5 In (b) of, the E part represents the battery mounting point 22 arranged on the beam assembly 12, and the battery 20 can be mounted on the central floor 1 by using a fixing component such as a screw or a bolt at this position. As shown in the enlarged view of the E part, a boss 24 surrounding the battery mounting point 22 is formed at the outer surface of the battery mounting point 22 to increase its strength and rigidity. Through such reinforcing structure of the battery mounting point, the requirements of high strength, high rigidity and high reliability of the vehicle chassis for battery mounting can be met.

[0054] Figure 5 is a diagram showing a flow of a mounting process of the central floor and the battery of one embodiment of the present application.

[0055] First, as shown in (1) of FIG. 10, the large-scale integrally die-cast central floor 1 is connected with the reinforcing brackets 4, 5, 6 by a process such as screwing or riveting. Here, considering die-casting of the central floor 1 using aluminum material, it is preferable to use a connection method such as self-piercing riveting (SPR) or flow-drilling screw (FDS), for example. Figure 5

[0056] Next, as shown in (2) of FIG. 10, after the central floor 1 is positioned, the rear floor 2 and the front floor 3 are loaded from the H direction to both sides of the central floor and positioned, and then the central floor 1, the rear floor 2, and the front floor 3 are assembled together by a process such as screwing or riveting to form the complete vehicle chassis 10. Here, it is also preferable to use a connection method such as self-piercing riveting (SPR) or flow-drilling screw (FDS), for example. Figure 5

[0057] Then, as shown in (3) of FIG. 10, the battery 20 is assembled to the central floor 1 in a manner fixed with a screw and sealed with sealant 21, thereby realizing CTB integration. Figure 6

[0058] Figure 4 is a diagram showing a battery mounting point of the central floor of another embodiment of the present application.

[0059] In (1) of FIG. 11, a structure is shown in which the battery mounting points 22 are formed in both the side sills 11 and the beam assemblies 12. However, the present application is not limited thereto, and as shown in (2) of FIG. 11, a structure can be adopted in which the battery mounting points 22 are formed only in the side sills 11 of the central floor 1. Figure 6 Figure 6 In (1) of FIG. 11, a structure is shown in which the battery mounting points 22 are formed in both the side sills 11 and the beam assemblies 12. However, the present application is not limited thereto, and as shown in (2) of FIG. 11, a structure can be adopted in which the battery mounting points 22 are formed only in the side sills 11 of the central floor 1. Figure 7

[0060] Figure 1 is a shape diagram of the beam assembly of the central floor of another embodiment of the present application.

[0061] The beam assembly 12 of the central floor 1 of one embodiment of the present application adopts a structure in which the beam assembly 12 formed between two side sills 11 extending in the Y direction and parallel to each other is formed only by a cross beam and a longitudinal beam. Specifically, as shown in (1) of FIG. 12, the beam assembly 12 is formed only by the cross beam and the longitudinal beam. Figure 3 Figure 7 ​​​​​​As shown, longitudinal beams (sealing beams) 124 and 125 extending along the Y direction are formed on the outermost sides of the ±X direction (integrated with the side sill 11), and transverse beams (sealing beams) 126 and 127 extending along the X direction are formed on the outermost sides of the ±Y direction. Within the area enclosed by sealing beams 124 to 127, three transverse beams 121, 122, and 123 extending along the X direction are formed. Between transverse beams 121 and 122, between transverse beams 122 and 123, between sealing beam 127 and transverse beam 121, and between sealing beam 126 and transverse beam 123, one or more longitudinal beams are formed respectively. The figure shows a structure in which four longitudinal beams are formed between transverse beams 121 and 122, and two longitudinal beams are formed between the other transverse beams. However, this invention is not limited to this. The number of crossbeams and longitudinal beams can be changed according to the design requirements of the central floor 1, and the lengths of each beam in the X and Y directions are not limited and can be set according to design requirements. By forming the beam assembly 12 into a grid structure in this way, the overall rigidity, structural stability, and impact resistance of the central floor 1 can be improved.

[0062] And in Figure 7 In another embodiment of the present invention, the beam assembly of the central floor is shown, in which one or more longitudinal beams formed between the plurality of transverse beams 121-123 within the area enclosed by sealing beams 124-127 are replaced with inclined beams 128 that are inclined relative to the X and Y directions. The angle of such inclined beams 128 relative to the transverse beams is not particularly limited, for example, they may intersect at a 60° angle relative to the transverse beams. ​ As shown, as an example, four diagonal beams 128 are arranged between beams 121 and 122, and between beams 122 and 123, forming a triangle with one of the beams from two adjacent diagonal beams 128. This invention is not limited to this; the longitudinal beams between the multiple beams can also be replaced with diagonal beams, i.e., a structure with both longitudinal and diagonal beams can be used. Such a structure can further improve the overall shape stability and impact resistance of the central floor 1.

[0063] The above describes several embodiments for implementing this utility model, but this utility model is not limited to the above embodiments. The above embodiments are merely examples, and any embodiments with the same structure and function as the technical concept within the scope of this utility model are included in the technical scope of this utility model. Furthermore, various modifications and combinations of elements of multiple embodiments without departing from the spirit of this utility model are also included in the scope of this utility model.

Claims

1. A central floor for a vehicle, characterized in that: The central floor includes: a pair of side sills parallel to each other and spaced apart, the side sills extending along a first direction which is the length direction of the vehicle; and a beam assembly located between the pair of side sills in a second direction which is the width direction of the vehicle, The side sills and the beam assembly of the central floor are formed integrally, The central floor is a die-cast body made of aluminum alloy.

2. The central floor according to claim 1, characterized in that: The beam assembly includes a plurality of longitudinal beams extending along the first direction and a plurality of cross beams extending along the second direction, Reinforcement brackets are provided at positions where more than one of the cross beams are connected to the side sills.

3. The central floor according to claim 1 or 2, characterized in that: The beam assembly includes a plurality of diagonal beams inclined with respect to the first direction and the second direction.

4. The central floor according to claim 1, characterized in that: A battery can be assembled on the bottom surface of the central floor facing the ground, The bottom surfaces of a plurality of sealing beams in the beam assembly for sealing the battery form a battery sealing plane, A battery sealing adhesive is provided around the battery in a circle, By pasting the battery sealing adhesive on the battery sealing plane, the space between the central floor and the battery can be sealed.

5. The central floor according to claim 4, characterized in that: Reinforcing ribs are formed on the beam assembly and the side sills.

6. The central floor according to claim 5, characterized in that: The sealing beams in the beam assembly have the reinforcing ribs formed on the top surface, The beams in the beam assembly other than the sealing beams have the reinforcing ribs formed on the bottom surface.

7. The central floor according to claim 5 or 6, characterized in that: The cross-section of the reinforcing rib obtained by cutting in a plane perpendicular to the die-casting direction is in the shape of a Chinese character 'Ri' (日).

8. The central floor according to claim 4, characterized in that: Battery mounting points for mounting the battery are formed at the bottom of the beam assembly, and the battery can be disassembled and assembled as a whole with respect to the central floor.

9. The central floor according to claim 8, characterized in that: A strengthening mechanism is provided at the battery mounting points.

10. The central floor according to claim 8 or 9, characterized in that: The battery mounting points are only provided on the side sills.

11. A vehicle, characterized in that: The chassis of the vehicle has the central floor according to any one of claims 1 to 10, and a front floor and a rear floor connected to the central floor in the length direction of the vehicle.

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