Modular chassis structure and vehicle

Abstract

The invention relates to the technical field of vehicle chassis, and provides a modular chassis structure and a vehicle, the modular chassis structure comprises a front frame assembly, a middle frame assembly and a rear frame assembly, and a front integrated module is integrated on the front frame assembly; the first end of the middle frame assembly is detachably connected with the front frame assembly, and one or more layers of battery modules are arranged on the middle frame assembly; the rear frame assembly is detachably connected with the second end of the middle frame assembly, and a rear integrated module is integrated on the rear frame assembly; modular design and sectional assembly are adopted for the chassis, the traditional integrated layout is broken through, each section of assembly of the frame is independently assembled, the assembly difficulty is reduced, the middle frame assembly supports and fixes a battery, and the middle frame assembly can serve as a part of a longitudinal beam of the frame to be connected with a longitudinal beam of the front frame assembly and a longitudinal beam of the rear frame assembly to form a complete longitudinal beam. And design redundancy is reduced, different endurance requirements are met, and lightweight design of the chassis is facilitated.

Description

Technical Field

[0001] This invention relates to the field of vehicle chassis technology, and more particularly to a modular chassis structure and vehicle. Background Technology

[0002] As national energy conservation and environmental protection laws become increasingly stringent and the market share of new energy heavy trucks increases year by year, the market has placed higher demands on their performance and range. The batteries of traditional tractor trucks are mainly located on the back of the vehicle. This method occupies a lot of cargo space and limits the further improvement of battery capacity. With the increasing demand for long-distance transportation of more than 500 kilometers, the traditional 6*4 tractor truck chassis layout can no longer meet this demand.

[0003] However, the battery-mounted design, based on the traditional chassis architecture, still limits the power capacity and cannot meet the long-haul express delivery market's demand for high endurance. Specifically, these solutions face the following drawbacks: 1. Chassis space limitations: Although the battery is moved under the chassis, the space under the tractor is limited, specifically in terms of the wheelbase of the first and second axles. When the wheelbase is kept the same as that of traditional vehicles, the increase in battery capacity is still limited, making it difficult to meet the high range requirements of long-distance transportation. Increasing the wheelbase of the first and second axles can provide more space for the battery, but it will affect the vehicle's driving stability, handling, and cargo space, such as turning ability and emergency obstacle avoidance performance. 2. Poor integration of chassis architecture: In traditional chassis architecture, the frame and battery frame are designed separately. The frame is the same as that of traditional energy vehicles, and the battery frame is connected to the frame through connectors. This design often results in design redundancy in the chassis. At the connection between the frame and the battery, the frame is often deformed due to the side placement of the battery on both sides of the frame. This is not conducive to lightweight chassis design or frame stress. (3) Poor modular design and assembly of chassis: The existing traditional chassis architecture lacks modular design and still uses the traditional vehicle assembly method. The thermal management system, controller, battery, electric drive, etc. are gradually assembled on the production line based on the chassis. Since the battery of a long-range electric heavy truck with a range of more than 500 kilometers weighs nearly 5 tons, it is extremely difficult to hoist the battery onto the chassis and the assembly efficiency is low. Summary of the Invention

[0004] This invention provides a modular chassis structure and vehicle to solve the problems of low assembly efficiency and small battery capacity of existing tractor chassis frames.

[0005] In a first aspect, the present invention provides a modular chassis structure, comprising: A front frame assembly, on which a front integrated module is integrated; A mid-frame assembly, the first end of which is detachably connected to the front frame assembly, and one or more battery modules are provided on the mid-frame assembly; The rear frame assembly is detachably connected to the second end of the middle frame assembly, and the rear frame assembly integrates a rear integrated module.

[0006] According to a modular chassis structure provided by the present invention, the central frame assembly includes: First central longitudinal beam; The second central longitudinal beam is arranged at intervals with the first central longitudinal beam along the width direction of the vehicle chassis, and there are accommodating spaces for installing battery modules on the outer side of the second central longitudinal beam, the outer side of the first central longitudinal beam, and between the second central longitudinal beam and the first central longitudinal beam.

[0007] According to a modular chassis structure provided by the present invention, the central frame assembly includes: Multiple first central longitudinal beams are provided, and the multiple first central longitudinal beams are stacked along the height direction of the vehicle chassis. The second central longitudinal beam has the same number as the first central longitudinal beam and corresponds to each other in layers. The second central longitudinal beam in each layer is arranged at intervals with the first central longitudinal beam along the width direction of the vehicle chassis. In addition, there are accommodating spaces for installing battery modules on the outer side of the second central longitudinal beam, the outer side of the first central longitudinal beam, and between the second central longitudinal beam and the first central longitudinal beam in each layer.

[0008] According to a modular chassis structure provided by the present invention, the front integrated module includes: The front axle and front suspension are used to provide vehicle support and guidance. The chassis front suspension structure is located at the front end of the front frame assembly and is used to support and realize the steering and shock absorption of the front axle and front suspension. An electronically controlled high-voltage system is used to electrically connect with the drive components in the front axle and front suspension to provide power transmission and high-voltage control; A thermal management system is located inside the front frame assembly and is used to regulate the temperature of the electronically controlled high-voltage system.

[0009] According to a modular chassis structure provided by the present invention, the rear integrated module includes: The rear suspension mechanism is located below the rear frame assembly. The top of the rear suspension mechanism is movably connected to the rear frame assembly, and its bottom is fixedly connected to the drive wheel. An electric drive system is used to connect to the drive wheels via a power transmission component to provide power to drive the vehicle.

[0010] According to a modular chassis structure provided by the present invention, a first connecting frame is provided at a first end of the middle frame assembly, and the first connecting frame is connected to the front frame assembly; a second connecting frame is provided at a second end of the middle frame assembly, and the second connecting frame is connected to the rear frame assembly.

[0011] According to a modular chassis structure provided by the present invention, the front frame assembly includes: A pair of first longitudinal beams are arranged at intervals along the width direction of the vehicle chassis. The ends of the first longitudinal beams are connected to the first connecting frame, and the spacing between the pair of first longitudinal beams is the same as the spacing between the first middle longitudinal beam and the second middle longitudinal beam. The first connecting crossbeam is disposed at one end of the first longitudinal beam corresponding to the middle frame assembly, and the first connecting crossbeam is vertically connected between two adjacent first longitudinal beams; The first crossbeam is disposed at one end of the first longitudinal beam away from the central frame assembly, and the first crossbeam is vertically connected between two adjacent first longitudinal beams.

[0012] According to a modular chassis structure provided by the present invention, the rear frame assembly includes: A pair of second longitudinal beams are arranged at intervals along the width direction of the vehicle chassis. The ends of the second longitudinal beams are connected to the second connecting frame, and the spacing between the pair of second longitudinal beams is the same as the spacing between the pair of first longitudinal beams. The second connecting crossbeam is disposed at one end of the second longitudinal beam corresponding to the middle frame assembly, and the second connecting crossbeam is vertically connected between two adjacent second longitudinal beams; The second crossbeam is disposed at one end of the second longitudinal beam away from the middle frame assembly, and the second crossbeam is vertically connected between two adjacent first longitudinal beams; The third crossbeam is disposed between the second crossbeam and the second connecting crossbeam, and the third crossbeam is vertically connected between two adjacent second longitudinal beams.

[0013] According to a modular chassis structure provided by the present invention, the first connecting frame is provided with a first connecting interface adapted to the end of the first longitudinal beam, and the second connecting frame is provided with a second connecting interface adapted to the end of the second longitudinal beam.

[0014] In a second aspect, the present invention provides a vehicle including a modular chassis structure as described in the first aspect.

[0015] This invention provides a modular chassis structure, including a front frame assembly, a middle frame assembly, and a rear frame assembly. By dividing the chassis into three parts and adopting a segmented design, it allows for flexible arrangement according to different needs, expanding vehicle functionality. The middle frame assembly can carry different numbers of battery modules and can be arranged in one or more layers as needed to adapt to different range requirements and improve vehicle performance. By adopting modular installation and segmented assembly, it breaks through the traditional integrated layout. Each segment of the frame assembly is assembled independently, reducing assembly difficulty and improving production efficiency. It allows the battery modules to be installed in the middle frame assembly first, and then assembled as a whole, avoiding the difficulty of separately hoisting heavy batteries in the traditional method. In addition, the middle frame assembly not only supports and fixes the battery, but also serves as part of the frame longitudinal beam, connecting with the longitudinal beams of the front frame assembly and the rear frame assembly to form a complete longitudinal beam. Compared with the traditional separate design of the frame and battery frame, it reduces design redundancy and is conducive to lightweight chassis design. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a modular chassis structure provided in an embodiment of the present invention.

[0018] Figure 2 This is a structural schematic diagram of the front frame assembly, middle frame assembly, and rear frame assembly provided in an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the connection structure of the first middle longitudinal beams of the upper and lower layers provided in an embodiment of the present invention.

[0020] Figure label: 1. Front frame assembly; 11. First longitudinal beam; 12. First connecting crossbeam; 13. First crossbeam; 2. Mid-frame assembly; 21. First mid-frame longitudinal beam; 22. Second mid-frame longitudinal beam; 23. First connecting frame; 24. Second connecting frame; 25. Battery frame side plate; 26. Battery frame connecting crossbeam; 3. Rear frame assembly; 31. Second longitudinal beam; 32. Second connecting crossbeam; 33. Second crossbeam; 34. Third crossbeam.

[0021] 4. Front axle and front suspension; 5. Chassis front suspension structure; 6. Thermal management system; 7. Electronic high-voltage system; 8. Electric drive system; 9. Rear suspension system; 10. Battery module; Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] The following is combined Figures 1-3 This invention describes a modular chassis structure and vehicle.

[0024] This invention provides a modular chassis structure, such as... Figures 1-2 As shown, it includes: a front frame assembly 1, a middle frame assembly 2, and a rear frame assembly 3. The front frame assembly 1 integrates a front integrated module; the first end of the middle frame assembly 2 is detachably connected to the front frame assembly 1, and the middle frame assembly 2 is provided with one or more battery modules 10; the rear frame assembly 3 is detachably connected to the second end of the middle frame assembly 2, and the rear frame assembly 3 integrates a rear integrated module.

[0025] As can be seen from the above scheme, the present invention divides the chassis into three parts and adopts a segmented design, which can be flexibly arranged according to different needs, thereby expanding the vehicle's functions. The middle frame assembly 2 can carry different numbers of battery modules 10 and can be arranged in one or more layers as needed to adapt to different range requirements and improve vehicle performance. By adopting a modular design and segmented assembly, it breaks through the traditional integrated layout. Each section of the frame assembly is assembled independently, reducing assembly difficulty and improving production efficiency. It is possible to install the battery modules 10 in the middle frame assembly 2 first and then assemble the whole assembly, avoiding the difficulty of lifting heavy batteries separately in the traditional method. In addition, the middle frame assembly 2 not only supports and fixes the battery, but also serves as part of the frame longitudinal beam, connecting with the longitudinal beams of the front frame assembly 1 and the rear frame assembly 3 to form a complete longitudinal beam. Compared with the traditional separate design of the frame and battery frame, it reduces design redundancy and is conducive to lightweight chassis design.

[0026] In some embodiments, a battery module 10 is disposed on the central frame assembly 2.

[0027] Specifically, the mid-frame assembly 2 includes a first mid-longitudinal beam 21 and a second mid-longitudinal beam 22. The second mid-longitudinal beam 22 and the first mid-longitudinal beam 21 are spaced apart along the width direction of the vehicle chassis. Accommodation spaces for installing the battery module 10 are provided on the outer side of the second mid-longitudinal beam 22, the outer side of the first mid-longitudinal beam 21, and between the second mid-longitudinal beam 22 and the first mid-longitudinal beam 21.

[0028] In some alternative embodiments, a multi-layer battery module 10 is provided on the central frame assembly 2.

[0029] Reference Figure 2 and Figure 3 Specifically, the mid-frame assembly 2 includes multiple first mid-longitudinal beams 21, which are stacked along the height direction of the vehicle chassis. The number of second mid-longitudinal beams 22 is the same as that of the first mid-longitudinal beams 21 and they correspond to each other in layers. The second mid-longitudinal beams 22 and the first mid-longitudinal beams 21 in each layer are spaced apart along the width direction of the vehicle chassis. In addition, there are accommodating spaces for installing battery modules 10 on the outer side of the second mid-longitudinal beams 22, the outer side of the first mid-longitudinal beams 21, and between the second mid-longitudinal beams 22 and the first mid-longitudinal beams 21 in each layer.

[0030] In other words, the arrangement can be selected according to the actual situation. When a single-layer battery module 10 is arranged, only one first central longitudinal beam 21 and one second central longitudinal beam 22 are assembled to form a single-layer load-bearing structure. When a multi-layer battery module 10 is arranged, at least one first central longitudinal beam 21 and one second central longitudinal beam 22 are added along the height direction of the vehicle chassis to form a multi-layer load-bearing structure with upper and lower superposition, so as to adapt to the arrangement of battery modules 10 with different numbers of layers.

[0031] Preferably, the first central longitudinal beam 21 and the second central longitudinal beam 22 are the same size and have the same cross-sectional structure, and modular assembly can be achieved through standardized connectors.

[0032] Optionally, two adjacent second middle longitudinal beams 22 or first middle longitudinal beams 21 are assembled in layers by bolts or snap-fit ​​structures, and the second middle longitudinal beams 22 and the first middle longitudinal beams 21 are provided with mounting holes for fixed connection with the battery module 10. In this embodiment, the central frame assembly 2 also includes a battery frame connecting crossbeam 26 and a battery frame side plate 25, such as Figure 1 and Figure 2 As shown, the battery frame side plates 25 are arranged on both sides of the central frame assembly 2. The battery frame connecting beams 26 are connected between the battery frame side plates 25 and the first central longitudinal beam 21, between the battery frame side plates 25 and the second central longitudinal beam 22, and between the first central longitudinal beam 21 and the second central longitudinal beam 22 in each layer. The battery frame side plates 25 are provided with installation positioning structures corresponding to the number of layers of the central longitudinal beam, such as bolt holes or welded positioning surfaces, to fix the battery frame connecting beams 26.

[0033] In this embodiment, the front integrated module includes: front axle and front suspension 4, chassis front suspension structure 5, electronically controlled high-voltage system 7, and thermal management system 6.

[0034] like Figure 1As shown, the front suspension structure 5 is located at the front end of the front frame assembly 1, and is used to support and realize the steering and shock absorption functions of the front axle and the front suspension 4. The front axle and the front suspension 4 are mounted below the front frame assembly 1. The upper part of the front axle and the front suspension structure 5 are movably connected to the front suspension structure 5 through the suspension components, and the lower part is in contact with the ground to realize vehicle support and driving guidance. The electronic high-voltage system 7 is fixedly installed in the middle area of ​​the front frame assembly 1 through insulating gaskets. It is electrically connected to the drive components such as motors and sensors in the front axle and the front suspension 4 through circuits to provide power transmission and high-voltage control. The thermal management system 6 is arranged inside the front frame assembly 1 and is connected to the electronic high-voltage system 7 around the front suspension structure 5 through pipelines. It is used to regulate the temperature of the electronic high-voltage system 7, and the pipelines are arranged along the preset channels of the frame to avoid the moving parts of the front axle and the front suspension 4.

[0035] Furthermore, the rear integrated module includes a rear suspension mechanism and an electric drive system 8. The rear suspension mechanism is located below the rear frame assembly 3, with its upper part movably connected to the rear frame assembly 3 via a suspension connection component, and its lower part fixedly connected to the drive wheel. It is used to support the vehicle, buffer road impacts, and maintain driving stability. For example, the rear suspension mechanism includes a shock absorber, a spring, and a guide device. One end of the shock absorber and spring is fixedly connected to the suspension mount of the rear frame assembly 3, and the other end is hinged to the axle of the drive wheel. The guide device is used to limit the movement trajectory of the axle. The electric drive system 8 is installed in the middle area of ​​the rear frame assembly 3 and is connected to the drive wheel in the rear suspension system 9 via a power transmission component. It is used to convert electrical energy into mechanical energy to drive the vehicle.

[0036] It should be noted that the specific components of the aforementioned front and rear integrated modules are products of existing technology. Their structure and principles are not the focus of this article and will not be elaborated upon here.

[0037] In this embodiment, a first connecting frame 23 is provided at the first end of the middle frame assembly 2, and the first connecting frame 23 is connected to the front frame assembly 1; a second connecting frame 24 is provided at the second end of the middle frame assembly 2, and the second connecting frame 24 is connected to the rear frame assembly 3.

[0038] This setup enables rapid assembly. When a section of the frame assembly malfunctions, that section can be directly disassembled for repair or replacement without disassembling the entire chassis, thus reducing maintenance costs and time. For example, if the electric drive system 8 of the rear frame assembly 3 malfunctions, the rear frame assembly 3 can be disassembled separately for repair.

[0039] like Figure 2As shown, the front frame assembly 1 includes: a pair of first longitudinal beams 11, a first connecting crossbeam 12, and a first crossbeam 13; wherein, the pair of first longitudinal beams 11 are arranged at intervals along the width direction of the vehicle chassis, the ends of the first longitudinal beams 11 are detachably connected to the first connecting frame 23, and the spacing between the pair of first longitudinal beams 11 is the same as the spacing between the first middle longitudinal beam 21 and the second middle longitudinal beam 22; the first connecting crossbeam 12 is disposed at one end of the first longitudinal beam 11 corresponding to the middle frame assembly 2, and the first connecting crossbeam 12 is vertically connected between two adjacent first longitudinal beams 11; the first crossbeam 13 is disposed at one end of the first longitudinal beam 11 away from the middle frame assembly 2, and the first crossbeam 13 is vertically connected between two adjacent first longitudinal beams 11.

[0040] The rear frame assembly 3 includes: a pair of second longitudinal beams 31, a second connecting crossbeam 32, a second crossbeam 33, and a third crossbeam 34. The pair of second longitudinal beams 31 are spaced apart along the width direction of the vehicle chassis. The ends of the second longitudinal beams 31 are detachably connected to the second connecting frame 24, and the spacing between the pair of second longitudinal beams 31 is the same as the spacing between the pair of first longitudinal beams 11. The second connecting crossbeam 32 is located at one end of the second longitudinal beam 31 corresponding to the middle frame assembly 2, and the second connecting crossbeam 32 is vertically connected between two adjacent second longitudinal beams 31. The second crossbeam 33 is located at one end of the second longitudinal beam 31 away from the middle frame assembly 2, and the second crossbeam 33 is vertically connected between two adjacent first longitudinal beams 11. The third crossbeam 34 is located between the second crossbeam 33 and the second connecting crossbeam 32, and the third crossbeam 34 is vertically connected between two adjacent second longitudinal beams 31.

[0041] In some specific embodiments, the first connecting frame 23 is provided with a first connecting interface adapted to the end of the first longitudinal beam 11, and the second connecting frame 24 is provided with a second connecting interface adapted to the end of the second longitudinal beam 31. The two ends of the middle frame assembly 2 can be connected to the front frame assembly 1 and the rear frame assembly 3 respectively by bolt connection or welding to form a continuous force transmission path. For example, when a single-layer battery module 10 is arranged, the first middle longitudinal beam 21 and the second middle longitudinal beam 22 are respectively connected to a pair of first longitudinal beams 11 and a pair of second longitudinal beams 3 at both ends. 1. Connect to form an integrated frame longitudinal beam structure; when arranging multi-layer battery modules 10, depending on the actual situation, select the first middle longitudinal beam 21 and the second middle longitudinal beam 22 located at the top, bottom, or middle layer to connect with a pair of first longitudinal beams 11 and a pair of second longitudinal beams 31 at both ends to form an integrated frame longitudinal beam structure; thereby, the middle longitudinal beam of the middle frame assembly 2 is connected with the first longitudinal beam 11 and the second longitudinal beam 31 to form a complete longitudinal beam, which is used to bear the longitudinal load, bending load and torsional load during vehicle operation.

[0042] This invention also provides a vehicle including the aforementioned modular chassis structure. This vehicle is a new energy commercial vehicle. Due to the adoption of the aforementioned modular chassis structure, the shortcomings of traditional chassis are effectively solved, and it has the following advantages: 1. Flexible layout and strong expandability: The chassis is divided into front, middle and rear frame assemblies 3 using a modular design. Each part can be flexibly arranged with functional systems as needed. The layered longitudinal beam structure of the middle frame assembly 2 can carry different numbers of battery modules 10 according to the needs of the whole vehicle, which facilitates the expansion of wheelbase and functions, meets the demand for long-distance transportation for high range, and improves the applicability of the vehicle.

[0043] 2. Efficient and convenient assembly: Breaking through the traditional one-piece frame layout, it adopts a segmented structure, and each segment of the frame assembly can be assembled independently, reducing assembly difficulty. The modular assembly method relies on the three-section integrated frame and connecting components to achieve rapid positioning and assembly, improve production efficiency, and reduce assembly time and labor costs.

[0044] 4. Structural optimization and performance improvement: The integrated design of the central frame assembly 2 and the new energy battery frame not only supports and fixes the battery, but also forms a complete longitudinal beam as part of the frame longitudinal beam. This optimizes the stress structure of the frame, reduces design redundancy, facilitates lightweight chassis design, and improves vehicle driving stability and handling.

[0045] 5. Low maintenance cost: The connecting brackets at both ends of the middle frame assembly 2 facilitate quick connection with the front and rear frame assemblies 3. Each frame assembly is independent, and when a module fails, it can be disassembled and repaired or replaced separately without disassembling the entire chassis, reducing maintenance difficulty and cost and improving vehicle utilization efficiency.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular chassis structure, characterized in that, include: A front frame assembly (1) is provided, on which a front integrated module is integrated; The middle frame assembly (2) is detachably connected to the front frame assembly (1) at its first end, and one or more battery modules (10) are provided on the middle frame assembly (2). The rear frame assembly (3) is detachably connected to the second end of the middle frame assembly (2), and the rear frame assembly (3) integrates a rear integrated module.

2. The modular chassis structure according to claim 1, characterized in that, The mid-frame assembly (2) includes: First central longitudinal beam (21); The second central longitudinal beam (22) and the first central longitudinal beam (21) are arranged at intervals along the width direction of the vehicle chassis, and there are accommodating spaces for installing battery modules (10) on the outer side of the second central longitudinal beam (22), the outer side of the first central longitudinal beam (21), and between the second central longitudinal beam (22) and the first central longitudinal beam (21).

3. The modular chassis structure according to claim 1, characterized in that, The mid-frame assembly (2) includes: Multiple first central longitudinal beams (21) are provided, and the multiple first central longitudinal beams (21) are stacked along the height direction of the vehicle chassis. The second central longitudinal beam (22) has the same number as the first central longitudinal beam (21) and corresponds to each other in layers. The second central longitudinal beam (22) and the first central longitudinal beam (21) of each layer are arranged at intervals along the width direction of the vehicle chassis. The outer side of the second central longitudinal beam (22), the outer side of the first central longitudinal beam (21), and the space between the second central longitudinal beam (22) and the first central longitudinal beam (21) of each layer are all provided for accommodating the battery module (10).

4. The modular chassis structure according to claim 2 or 3, characterized in that, The front integration module includes: The front axle and front suspension (4) are used to provide vehicle support and driving guidance; The chassis front suspension structure (5) is located at the front end of the front frame assembly (1) and is used to support and realize the steering and shock absorption of the front axle and the front suspension (4); An electronically controlled high-voltage system (7) is used to electrically connect with the drive components in the front axle and front suspension (4) to provide power transmission and high-voltage control; A thermal management system (6) is located inside the front frame assembly (1) and is used to regulate the temperature of the electronically controlled high-voltage system (7).

5. The modular chassis structure according to claim 2 or 3, characterized in that, The rear integration module includes: The rear suspension mechanism is located below the rear frame assembly (3). The top of the rear suspension mechanism is movably connected to the rear frame assembly (3), and its bottom is fixedly connected to the drive wheel. An electric drive system (8) is used to connect to the drive wheels via a power transmission component to provide power to drive the vehicle.

6. The modular chassis structure according to claim 2 or 3, characterized in that, The first end of the middle frame assembly (2) is provided with a first connecting frame (23), which is connected to the front frame assembly (1); the second end of the middle frame assembly (2) is provided with a second connecting frame (24), which is connected to the rear frame assembly (3).

7. The modular chassis structure according to claim 6, characterized in that, The front frame assembly (1) includes: A pair of first longitudinal beams (11) are arranged at intervals along the width direction of the vehicle chassis. The ends of the first longitudinal beams (11) are connected to the first connecting frame (23), and the spacing between the pair of first longitudinal beams (11) is the same as the spacing between the first middle longitudinal beam (21) and the second middle longitudinal beam (22). The first connecting crossbeam (12) is disposed at one end of the first longitudinal beam (11) corresponding to the middle frame assembly (2), and the first connecting crossbeam (12) is vertically connected between two adjacent first longitudinal beams (11); The first crossbeam (13) is disposed at one end of the first longitudinal beam (11) away from the middle frame assembly (2), and the first crossbeam (13) is vertically connected between two adjacent first longitudinal beams (11).

8. The modular chassis structure according to claim 7, characterized in that, The rear frame assembly (3) includes: A pair of second longitudinal beams (31) are arranged at intervals along the width direction of the vehicle chassis. The ends of the second longitudinal beams (31) are connected to the second connecting frame (24), and the spacing between the pair of second longitudinal beams (31) is the same as the spacing between the pair of first longitudinal beams (11). The second connecting crossbeam (32) is disposed at one end of the second longitudinal beam (31) corresponding to the middle frame assembly (2), and the second connecting crossbeam (32) is vertically connected between two adjacent second longitudinal beams (31); The second crossbeam (33) is disposed at one end of the second longitudinal beam (31) away from the middle frame assembly (2), and the second crossbeam (33) is vertically connected between two adjacent first longitudinal beams (11); The third crossbeam (34) is disposed between the second crossbeam (33) and the second connecting crossbeam (32), and the third crossbeam (34) is vertically connected between two adjacent second longitudinal beams (31).

9. The modular chassis structure according to claim 8, characterized in that, The first connecting frame (23) is provided with a first connecting interface adapted to the end of the first longitudinal beam (11), and the second connecting frame (24) is provided with a second connecting interface adapted to the end of the second longitudinal beam (31).

10. A vehicle, characterized in that, Includes the modular chassis structure described in any one of claims 1-9.

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