Automobile flat floor body structure and automobile

Abstract

The invention discloses an automobile flat floor body structure and an automobile, and relates to the field of automobiles, the automobile flat floor body structure comprises a front floor and a rear floor, the front floor is lifted to a set height, so that the front floor and the rear floor form a flat floor structure; a protrusion is arranged in the middle of the flat floor structure and extends in the length direction of a vehicle body, so that a hollow channel is formed in the bottom of the flat floor structure to be matched with a four-wheel-drive fuel vehicle type. The flat floor can fix a pure electric battery pack through a doorsill, or the flat floor structure is provided with a hybrid power battery pack by additionally arranging a mounting longitudinal beam. The optimized flat floor structure is adopted, the system is suitable for space layout of pure electric vehicle models, hybrid power vehicle models and fuel vehicle models, universality of multiple vehicle models is achieved, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobiles, in particular to a flat floor automobile body structure and an automobile. BACKGROUND

[0002] In the field of automobile design and manufacturing, SUV (Sport Utility Vehicle), MPV (Multi-Purpose Vehicle) and traditional fuel vehicles and new energy vehicles (including pure electric vehicles and hybrid vehicles) have significant differences in body structure design, especially in the floor form, which directly affects the platform generalization rate of the body floor. The traditional MPV and SUV models have limitations in body design, and cannot effectively balance the spacious interior space and multiple power energy forms. The prior art discloses a dual-purpose pure electric vehicle body architecture, wherein the middle and rear floor architecture includes a flat floor, a rear floor, a cross beam assembly, a longitudinal beam assembly and a battery pack, the battery pack is installed below the cross beam assembly, and the flat floor is installed above the cross beam assembly; the middle and rear floor architecture can be applied to a commercial and passenger dual-purpose pure electric vehicle, but cannot be compatible with pure electric vehicles, hybrid vehicles and fuel vehicles. SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the present application is to provide a flat floor automobile body structure and an automobile, which adopts an optimized flat floor structure, is suitable for the spatial layout of pure electric vehicles, hybrid vehicles and fuel vehicles, realizes the generalization of multiple vehicle models, and reduces costs.

[0004] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme: In a first aspect, an embodiment of the present application provides a flat floor automobile body structure, comprising a front floor and a rear floor, the front floor is lifted to a certain height, so that the front floor and the rear floor form a flat floor structure; A protrusion is arranged in the middle of the flat floor structure, the protrusion extends along the length direction of the body, so that a hollow channel is formed at the bottom of the flat floor structure, to adapt to four-wheel drive fuel vehicles; The flat floor can fix a pure electric battery pack by using a rocker panel, or the flat floor structure can install a hybrid power battery pack by additionally installing a longitudinal beam.

[0005] As a further implementation manner, when the flat floor structure is matched with a hybrid vehicle, the hybrid power battery pack is installed on the lower side of the front floor, and the fuel tank is installed on the lower side of the rear floor.

[0006] As a further implementation manner, when the flat floor structure is matched with a pure electric vehicle, the battery pack extends from the lower side of the front floor to a certain position on the lower side of the rear floor.

[0007] As a further implementation manner, when the flat floor structure is matched with a fuel vehicle, the fuel tank is installed on the lower side of the rear floor.

[0008] As a further implementation manner, when the fuel vehicle model is a four-wheel drive fuel vehicle model, a transmission shaft in the four-wheel drive transmission system is arranged in the hollow channel.

[0009] As a further implementation manner, the rear floor body adopts a high-strength frame, and the rear floor is arranged with a plurality of support cross beams and support longitudinal beams to reserve seat slide rail installation space.

[0010] As a further implementation manner, the lifting height of the front floor is 50-60 cm.

[0011] In a second aspect, the embodiment of the present application further provides an automobile provided with the flat floor vehicle body structure, and the automobile is a pure electric vehicle model, a hybrid vehicle model or a fuel vehicle model.

[0012] As a further implementation manner, a row of seats is arranged on the upper side of the front floor, and two rows of seats and three rows of seats are arranged on the upper side of the rear floor. The two rows of seats and the three rows of seats are adapted to the height of the row of seats lifted up.

[0013] As a further implementation manner, a carpet is arranged on the upper side of the flat floor structure.

[0014] The present application has the following beneficial effects: (1) The vehicle body floor of the present application adopts a flat floor structure, including a front floor and a rear floor, and the front floor is lifted to a set height; the battery pack is fixed through the threshold, and the flat floor structure is applicable to a pure electric vehicle model; a hybrid power battery pack is installed through the added installation longitudinal beam, and the flat floor structure is applicable to a hybrid vehicle model; the convex structure is arranged, and the flat floor structure is applicable to a two-wheel drive fuel vehicle model and a four-wheel drive fuel vehicle model, meets the universality requirement of the vehicle body floor, reduces the manufacturing cost, and forms different layout schemes for different vehicle models, so that the vehicle body floor distribution structure is reasonable and compact.

[0015] (2) For the pure electric vehicle model, the battery pack is fixed at both ends of the threshold bottom surface, and for the hybrid vehicle model, the hybrid power battery is fixed at both ends of the installation longitudinal bottom surface; both installation modes can ensure the installation stability of the battery pack, so as to adapt to different vehicle models; at the same time, the support longitudinal beam can also assist in optimizing the front and rear axle load, and improving the vehicle driving stability.

[0016] (3) The rear floor of the present application adopts a high-strength frame structure, and the front support cross beam, the rear support cross beam and the two side support longitudinal beams are arranged to provide the installation space of the long slide rail; at the same time, the flat floor structure can realize the carpet paving on the upper surface of the vehicle body floor, and increase the comfort of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated herein in

[0018] Figure 1 is a key module layout of a hybrid vehicle according to one or more embodiments of the application; Figure 2 is a key module layout of a hybrid vehicle according to one or more embodiments of the application; Figure 3 is a key module layout of a hybrid vehicle according to one or more embodiments of the application; Figure 4 is a key module layout of a pure electric vehicle according to one or more embodiments of the application; Figure 5 is a key module layout of a pure electric vehicle according to one or more embodiments of the application; Figure 6 is a key module layout of a pure electric vehicle according to one or more embodiments of the application; Figure 7 is a key module layout of a two-wheel drive gasoline vehicle according to one or more embodiments of the application; Figure 8 is a key module layout of a two-wheel drive gasoline vehicle according to one or more embodiments of the application; Figure 9 is a key module layout of a four-wheel drive gasoline vehicle according to one or more embodiments of the application; Figure 10 is a key module layout of a four-wheel drive gasoline vehicle according to one or more embodiments of the application; Figure 11 is a key module layout of a four-wheel drive gasoline vehicle according to one or more embodiments of the application; Figure 12 is a front door sill x-section view according to one or more embodiments of the application; Figure 13 is a rear floor frame schematic view according to one or more embodiments of the application; Figure 14 is a carpet installation schematic view according to one or more embodiments of the application.

[0019] Wherein, 1, front floor; 2, rear floor; 3, pure electric battery pack; 4, fuel tank; 5, hybrid battery pack; 6, engine; 7, seat slide rail; 8, door sill; 9, mounting longitudinal beam; 10, electric motor; 11, rear drive motor; 12, transmission shaft; 13, transfer case; 14, protrusion; 15, front support cross beam; 16, rear support cross beam; 17, support longitudinal beam; 18, carpet. DETAILED DESCRIPTION

[0020] It should be noted that the following detailed description is illustrative only, and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0021] For the convenience of description, if the words "front", "rear", "left", "right" appear in the application, they only mean the same as the front, rear, left and right directions of the drawings themselves, and do not limit the structure, but only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as limiting the application.

[0022] Example 1 Different floor designs mean that specific chassis and body structures need to be developed for each vehicle model, increasing the complexity and cost of product development; different floor designs require production lines to have high flexibility and customization capabilities, requiring more molds, tooling and production line adjustments, increasing production costs and management complexity; the floor structure in the prior art cannot simultaneously meet the functional requirements of SUV / MPV and the design of a body structure compatible with multiple power sources.

[0023] Based on this, the embodiment provides a flat floor vehicle body structure, which designs a universal flat floor structure that can simultaneously accommodate pure electric vehicle models, hybrid vehicle models and fuel vehicle models (including two-wheel drive fuel vehicle models and four-wheel drive fuel vehicle models).

[0024] As shown in Figure 14 The vehicle body floor of the embodiment is a flat floor structure, including a front floor 1 and a rear floor 2. Compared with the existing floor structure, the front floor 1 of the embodiment is lifted upward by a certain height, reducing the difference between the front floor 1 and the rear floor 2; the front floor 1 and the rear floor 2 have a slight slope. Among them, the front floor 1 of the embodiment is lifted by 50~60cm compared with the existing front floor 1, which is conducive to the flat laying of the carpet 18 and improves the ride experience.

[0025] For pure electric vehicle models, as shown in Figures 4-6As shown, an electric motor 10 is installed between the two front wheels, and a rear-drive motor 11 is installed between the two rear wheels. The pure electric battery pack 3 is located between the front and rear wheels and under the vehicle floor. Specifically, the pure electric battery pack 3 is installed under the front floor 1, and its right end extends a certain length under the rear floor 2. The left and right ends of the pure electric battery pack 3 are connected to the corresponding door sills 8. The door sills 8 are important load-bearing components in the vehicle structure, possessing high strength and rigidity. Connecting the pure electric battery pack 3 to the door sills 8 is equivalent to adding lateral and longitudinal connection points in the vehicle structure, making the vehicle body form a more stable overall frame. At the same time, it makes full use of the space at the bottom of the vehicle near the door sills 8, integrating the pure electric battery pack 3 into the vehicle structure, avoiding the pure electric battery pack 3 occupying too much vertical space inside the vehicle.

[0026] For two-wheel drive gasoline vehicles, such as Figure 7 and Figure 8 As shown, the engine 6 is installed between the two front wheels, and the fuel tank 4 is installed under the rear floor 2, corresponding to the area below the seat rail 7. The fuel tank 4 is connected to the rear floor 2 by bolts, or the fuel tank 4 is installed on a bracket, which is welded or bolted to the rear floor 2.

[0027] Since the four-wheel drive transmission system of a four-wheel drive fuel vehicle includes structures such as a drive shaft 12, in order to make the flat floor structure of this embodiment applicable to four-wheel drive fuel vehicles, a protrusion 14 is provided at the middle position of the flat floor structure, and the protrusion 14 extends along the length direction of the vehicle body.

[0028] like Figures 9-11 As shown, in the four-wheel drive system, the driveshaft 12 is connected to the engine 6 on the left and the transfer case 13 on the right. The fuel tank 4 is located below the seat rail 7 and connected to the rear floor 2. The protrusion 14 protrudes from the flat floor at a certain height, and its longitudinal section is an isosceles trapezoid. By setting the protrusion 14, a hollow channel is formed on the lower side of the flat floor, through which the driveshaft 12 passes.

[0029] For hybrid vehicles, such as Figures 1-3 As shown, the engine 6 is installed between the two front wheels, and the hybrid battery pack 5 and the fuel tank 4 are arranged sequentially from front to back. The hybrid battery pack 5 is installed on the lower side of the front floor 1, and the fuel tank 4 is installed on the lower side of the rear floor 2. One end of the hybrid battery pack 5 extends along the length of the vehicle body to the slope between the front floor 1 and the rear floor 2, forming a compact arrangement of the hybrid battery pack 5 and the fuel tank 4.

[0030] like Figure 3As shown, the hybrid battery pack 5 is connected to the underside of the front floor 1 via mounting beams 9. The mounting beams 9 are symmetrically distributed with respect to the center of the flat floor and have a certain distance from the door sill 8. The installation of the hybrid battery pack 5 is achieved by adding mounting beams 9, without the need to redesign the floor structure. Hybrid vehicles need to consider the weight distribution of the engine 6, fuel tank 4, and hybrid battery pack 5. The supporting beams 17 can help optimize the front and rear axle loads and improve vehicle driving stability.

[0031] For both pure electric and gasoline vehicles, there is no need to install the longitudinal beam 9. For hybrid vehicles, the hybrid battery pack 5 can be installed by adding the longitudinal beam 9 at the bottom of the flat floor, thus meeting the universality requirements of the flat floor structure.

[0032] like Figure 12 As shown, for the pure electric vehicle's pure electric battery pack 3, the pure electric battery pack 3 is connected to the sill 8, and the connection point between the pure electric battery pack 3 and the sill 8 is located on the bottom surface of the sill 8. For the hybrid battery pack 5, both ends of the hybrid battery pack 5 are connected to the bottom of the mounting longitudinal beam 9 by bolts, and the bolt connection point is located in the middle of the mounting longitudinal beam 9. Therefore, the flat floor structure of this embodiment can accommodate both BEV and hybrid powertrains, effectively improving vehicle production flexibility and versatility.

[0033] Compared to traditional SUV body floors, the flat floor in this embodiment allows for the extension of second-row long sliding rails (seat rails 7) and a completely flat carpet surface. To accommodate the long sliding rails, the rear floor 2 main body utilizes a high-strength frame, such as high-strength steel or aluminum alloy, effectively distributing the various stresses borne by the seat rails 7 during operation. Figure 13 As shown, a front support beam 15 and a rear support beam 16 are provided on the upper side of the rear floor 2, and support longitudinal beams 17 are symmetrically arranged on the left and right sides of the rear floor 2. The front support beam 15, the rear support beam 16 and the support longitudinal beams 17 on both sides provide long slide rail installation space.

[0034] The spacing between the front support beam 15 and the rear support beam 16 provides sufficient installation length for the second row of slide rails and sufficient forward and backward sliding space for the seats.

[0035] The significant height difference between the front and rear floors of traditional SUVs makes it difficult to lay carpets evenly. Figure 14 As shown, the flat floor structure in this embodiment reduces the height difference between the front and rear floors 2, allowing the carpet 18 to be laid flat on the upper side of the vehicle floor, laying the foundation for providing a comfortable riding environment.

[0036] This embodiment achieves compatibility with multiple vehicle models through a single vehicle floor and door sill 8. For hybrid vehicles, a separate mounting beam 9 for the hybrid battery pack 5 is added; for gasoline and pure electric vehicles, the aforementioned mounting beam 9 is omitted. This effectively improves vehicle production flexibility and versatility, and reduces manufacturing costs. This embodiment provides different layout schemes for different vehicle models, resulting in a reasonable and compact distribution structure for the vehicle floor.

[0037] Example 2: This embodiment provides a car equipped with the flat-floor body structure described in Embodiment 1. The car in this embodiment is a pure electric vehicle, a hybrid vehicle, or a gasoline vehicle.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flat-floor vehicle body structure, characterized in that, Includes a front floor and a rear floor, wherein the front floor is raised to a set height so that the front floor and the rear floor form a flat floor structure; The flat floor structure has a protrusion in the middle, which extends along the length of the vehicle body, so that the bottom of the flat floor structure forms a hollow channel to adapt to four-wheel drive fuel vehicles. The flat floor can be used to fix a pure electric battery pack using a threshold, or the flat floor structure can be used to install a hybrid battery pack by adding mounting beams.

2. The flat-floor vehicle body structure according to claim 1, characterized in that, When the flat floor structure is used in conjunction with a hybrid vehicle, the hybrid battery pack is installed under the front floor and the fuel tank is installed under the rear floor.

3. A flat-floor vehicle body structure according to claim 1 or 2, characterized in that, When the flat floor structure is used in conjunction with a pure electric vehicle, the battery pack extends from the underside of the front floor to a designated position on the underside of the rear floor.

4. A flat-floor vehicle body structure according to claim 1 or 2, characterized in that, When the flat floor structure is used in a fuel-powered vehicle, the fuel tank is installed under the rear floor.

5. A flat-floor vehicle body structure according to claim 4, characterized in that, When the fuel-powered vehicle is a four-wheel-drive fuel-powered vehicle, the drive shaft in the four-wheel-drive transmission system is located in the hollow channel.

6. The flat-floor vehicle body structure according to claim 1, characterized in that, The rear floor body adopts a high-strength frame, and the rear floor is arranged with several supporting crossbeams and supporting longitudinal beams to reserve space for seat slide rail installation.

7. The flat-floor vehicle body structure according to claim 1, characterized in that, The height of the front floor is raised by 50-60cm.

8. A car, characterized in that, The vehicle is equipped with a flat-floor body structure as described in any one of claims 1-7, and the vehicle is a pure electric vehicle, a hybrid vehicle, or a gasoline vehicle.

9. A car according to claim 8, characterized in that, A row of seats is installed on the upper side of the front floor, and a second and third row of seats are installed on the upper side of the rear floor. The second and third rows of seats are adapted to the height of the raised first row of seats.

10. A car according to claim 8, characterized in that, The flat floor structure is covered with a carpet.

Images