Platformization vehicle frame and design method

Abstract

The invention discloses a platform vehicle frame and a design method, and the method comprises the steps: dividing a vehicle frame erection plan into five structural modules, namely a front-section vehicle frame module, a middle-section vehicle frame module, a rear-section vehicle frame module, a suspension support module and an optional configuration module, and each module is independently developed; the five modules are modularly designed according to different requirements and are combined and matched, and frame assembly is completed. Each structure module can be independently developed, so that the design efficiency of the platform frame is improved, and the development difficulty of the frame is reduced; the platform design of the frame can cover all configurations of the platform, and repeated development of the frame due to different configurations is avoided; according to the design method, the platform frame can be modularly matched according to different platform configurations, so that the configuration of an automobile platform is enriched; compared with a traditional frame which is integrally welded and formed, each module of the frame can be independently welded and finally spliced into a complete frame, and the frame precision can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle frame design, and in particular to a platform vehicle frame and a design method thereof. Background Art

[0002] Off-road vehicles are mainly used in harsh road conditions, harsh climates and harsh terrains. The frame, as the skeleton of off-road vehicles, plays a very important role. On the one hand, it is the main installation and support structure for systems such as the body and powertrain. On the other hand, it is the main load-bearing structure of the vehicle, bearing the impact force transmitted by the chassis. The strength and reliability of the frame also determine the load-bearing capacity of the entire vehicle. At present, automobile development is platform-based development. For off-road vehicles, it is of great significance to develop a platform-based frame design method for off-road vehicles.

[0003] Most of the existing frame design methods are for improving frame performance and efficiency, and no research has been conducted on the design method of the frame, especially the platform frame itself. There is a publication number "CN115158510A" called a lightweight frame design method and system for automobiles, which lightweights the frame by establishing the relationship between performance parameters and structure; there is a publication number "CN118094999A" called a frame optimization design method based on machine learning and a publication number "CN113408055B" called a car frame structure optimization method, which optimizes the frame weight and performance by constructing a frame parameterized SFE; there is a publication number "CN116620406A" called a three-stage platform frame and manufacturing method, automobile, which mainly describes the platformization and generalization of frame parts and manufacturing.

[0004] Although the existing technology has made some progress in frame design, there are still several shortcomings. First, the existing design methods often focus on the optimization of a single performance, such as lightweight or structural strength, and lack comprehensive consideration of the overall performance and multifunctional adaptability of the frame. Secondly, the customized design process is complex and costly, which is not conducive to rapid response to market changes and personalized needs. In addition, the modularity of the existing frames is limited, and it is difficult to achieve efficient compatibility and interchangeability between different models, which limits the full implementation of the platform concept. Finally, the existing frame design also needs to be improved in terms of manufacturing accuracy and assembly efficiency, especially in terms of adaptability and reliability in complex off-road environments. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a platform frame and a design method, in which each structural module can be developed separately, which not only improves the design efficiency of the platform frame, but also reduces the difficulty of frame development; the frame platform design can cover all configurations of the platform, avoiding multiple developments of the frame due to different configurations; the platform frame of the present design method can be modularly matched according to different platform configurations, enriching the configuration of the automobile platform; the platform frame effectively reduces the types of parts, improves the commonality of frame parts, and reduces the manufacturing and management costs of parts; compared with the one-piece welding forming of the traditional frame, each module of the frame can be welded separately and finally assembled into a complete frame, which can effectively improve the frame precision.

[0006] In order to achieve the above object, according to one aspect of the present invention, a platform frame design method is provided, comprising:

[0007] S100, the frame design is divided into five structural modules: front frame module, middle frame module, rear frame module, suspension bracket module and optional configuration module. Each module can be developed independently;

[0008] S200, modular design of the front frame module is carried out according to the front suspension form and powertrain layout;

[0009] S300, according to different requirements of wheelbase, the middle frame module is designed with adjustable length;

[0010] S400, according to the different forms of rear suspension, the rear frame module is modularly designed into a reinforced version or a load-bearing version;

[0011] S500, according to the different body types, the suspension bracket module is designed in a corresponding modular manner;

[0012] S600, platform design of the frame interface to meet the installation requirements of different systems;

[0013] S700, a separate modular installation structure is designed for optional configurations, allowing modular matching of the entire vehicle;

[0014] S800, verify and optimize the frame performance through simulation analysis and bench testing to ensure that the established performance goals are met.

[0015] Furthermore, step S200 includes: modularizing the front frame module according to the form of independent suspension or non-independent suspension beam.

[0016] Furthermore, step S200 includes: modularizing the front frame module according to the two-wheel drive or four-wheel drive powertrain configuration.

[0017] Furthermore, step S300 includes: performing a modular design of a mid-section frame module with adjustable length according to different requirements of a long wheelbase, a short wheelbase and a standard wheelbase.

[0018] Furthermore, step S300 includes: making the longitudinal beam part of the middle frame into a straight section, and only changing the length of the left and right longitudinal beams of the middle frame, so as to meet the needs of vehicle models with different wheelbases without changing other structures.

[0019] Furthermore, step S400 includes: selecting an independent suspension or a non-independent suspension beam according to off-road performance or load-bearing performance to perform modular design on the rear frame module.

[0020] Further, step S500 includes: the suspension bracket includes a single-row vehicle body suspension bracket group, a double-row vehicle body suspension bracket group and a box-type vehicle body suspension bracket group.

[0021] Furthermore, step S600 includes: matching installation interfaces on the left and right longitudinal beams and the cross beam, and reserving corresponding frame interfaces for optional configurations and extended configurations.

[0022] Furthermore, the optional configuration in step S700 includes an electric winch mounting beam, front and rear hooks, and a lower-mounted spare tire.

[0023] According to a second aspect of the present invention, a platform frame is provided, which is manufactured by applying any step in the above-mentioned platform frame design method, and the five structural modules are combined and matched to meet different needs.

[0024] Beneficial effects of the present invention:

[0025] 1. Each structural module of the platform frame of the present invention can be developed separately, which not only improves the design efficiency of the platform frame, but also reduces the difficulty of frame development; the frame platform design can cover all platform configurations, avoiding multiple frame developments due to different configurations; the platform frame of the present design method can be modularly matched according to different platform configurations, enriching the configuration of the automobile platform; the platform frame effectively reduces the types of parts, improves the commonality of frame parts, and reduces the manufacturing and management costs of parts; compared with the integrated welding forming of the traditional frame, each module of the frame can be welded separately and finally assembled into a complete frame, which can effectively improve the frame accuracy.

[0026] 2. The present invention divides the platform frame into 7 design steps, which can meet all configuration requirements in one development, avoiding the problem of multiple frame development due to different configurations in the later stage.

[0027] 3. The platform frame of the present invention only changes the length of the left and right longitudinal beams of the middle frame, and can meet the needs of models with different wheelbases without changing other structures, thereby reducing the development difficulty and manufacturing cost of platform models with different wheelbases.

[0028] 4. The platform frame of the present invention has a modular design of a reinforced version and a load-bearing version for the rear section frame according to different rear suspension forms.

[0029] 5. The platform frame of the present invention designs a separate installation structure module for the optional configuration according to the requirements of the platform optional configuration, and the whole vehicle can modularly match these optional structures according to the configuration.

[0030] 6. The platform frame of the present invention can effectively reduce the types of frame parts, improve the commonality of parts, and thus reduce the manufacturing cost of the frame and the management cost of parts.

[0031] 7. Compared with the one-piece welding forming of the traditional frame, the platform frame of the present invention can first weld the front, middle and rear three sections of the frame separately into a small assembly, and then the three sections of the frame are assembled into a complete frame, which can effectively improve the frame welding accuracy.

[0032] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0034] Figure 1 It is a general framework diagram of the platform frame design of an embodiment of the present invention;

[0035] Figure 2 It is a schematic structural diagram of a front section frame embodiment of an embodiment of the present invention;

[0036] Figure 3 It is a schematic structural diagram of a middle section frame (standard wheelbase) of an embodiment of the present invention;

[0037] Figure 4 It is a schematic structural diagram of a middle section frame (short wheelbase) of an embodiment of the present invention;

[0038] Figure 5 It is a schematic structural diagram of a middle section frame (long wheelbase) of an embodiment of the present invention;

[0039] Figure 6 It is a schematic structural diagram of a rear section frame (reinforced version) of an embodiment of the present invention;

[0040] Figure 7 It is a schematic structural diagram of a rear section frame (load-bearing plate) of an embodiment of the present invention;

[0041] Figure 8 It is a schematic structural diagram of a single-row vehicle body suspension bracket embodiment of the present invention;

[0042] Fig. 9 It is a schematic structural diagram of a double-row vehicle body suspension bracket embodiment of the present invention;

[0043] Fig.10 It is a schematic structural diagram of a box-type vehicle body suspension bracket embodiment of the present invention;

[0044] Fig.11 This is a structural schematic diagram of an optional electric winch mounting beam embodiment of the present invention;

[0045] Fig.12 This is a schematic structural diagram of an optional front tow hook embodiment of the present invention;

[0046] Fig.13 This is a schematic structural diagram of an optional rear tow hook (enhanced version) according to an embodiment of the present invention;

[0047] Fig.14 It is a schematic structural diagram of an optional rear towing hook (carrying plate) embodiment of the present invention;

[0048] Fig.15 This is a schematic structural diagram of an optional lower spare tire rack embodiment of the present invention;

[0049] Fig.16 This is a schematic structural diagram of a reinforced frame embodiment of the present invention;

[0050] Fig.17 It is a structural schematic diagram of a load-bearing frame embodiment of an embodiment of the present invention;

[0051] Fig.18 The flowchart of the platform frame design method according to an embodiment of the present invention.

[0052] In all the drawings, the same reference numerals represent the same technical features, specifically: a front section frame 1; a first middle section frame 2; a second middle section frame 3; a third middle section frame 4; a first rear section frame 5; a second rear section frame 6; a single-row body suspension bracket group 7; a double-row body suspension bracket group 8; a box-type body suspension bracket group 9; an electric winch mounting beam 10; a front towing hook 11; a first rear towing hook 12; a second rear towing hook 13; and a lower spare tire rack 14. DETAILED DESCRIPTION

[0053] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0054] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0056] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as in the embodiments of this application.

[0057] The present invention provides a platform vehicle frame and a design method. Each structural module of the platform vehicle frame of the present invention can be developed separately, which not only improves the design efficiency of the platform vehicle frame, but also reduces the development difficulty of the vehicle frame. The frame platform design can cover all configurations of the platform, avoiding multiple developments of the frame due to different configurations. The platform vehicle frame of the present design method can be modularly matched according to different platform configurations, thereby enriching the configuration of the automobile platform. The platform vehicle frame effectively reduces the types of parts, improves the commonality of the frame parts, and reduces the manufacturing and management costs of the parts. Compared with the integrated welding forming of the traditional vehicle frame, each module of the vehicle frame can be welded separately and finally assembled into a complete vehicle frame, which can effectively improve the frame precision.

[0058] like Figure 1As shown, the present invention divides the design of the platform frame of an off-road vehicle into 5 structural modules and 7 design steps. The 5 separate structural modules include: a front frame module, a middle frame module, a rear frame module, a suspension bracket module and an optional configuration module. Each module can be developed separately, and the modules can also be developed in parallel, which not only improves the design efficiency of the platform frame, but also reduces the difficulty of frame development.

[0059] like Figure 1 As shown in the figure, the design of the platform frame is divided into 7 design steps, namely, modular design of the front frame, modular design of the middle frame, modular design of the rear frame, modular design of the suspension bracket, platform design of the frame interface, modular design of the optional configuration, and optimization of the frame performance. According to the off-road vehicle platform configuration, the frame is developed on a platform basis in accordance with the 7 design steps, so that all configuration requirements can be met in one development, thus avoiding the problem of multiple frame development caused by different configurations in the later stage.

[0060] Embodiment 1:

[0061] like Figure 2 As shown, this embodiment provides a front frame module structure. The design of the front frame 1 is mainly modularized according to the form of the front suspension and the layout of the powertrain. In order to ensure off-road performance, the front suspension in this embodiment adopts an independent suspension form, with a coil spring and a reserved air spring installation structure, and the powertrain is configured with front-wheel drive and full-time four-wheel drive.

[0062] Furthermore, the front frame 1 can be modularly designed according to user needs to be compatible with various independent suspension forms and powertrains.

[0063] Embodiment 2:

[0064] like Figure 3 , 4 As shown in Figure 5, this embodiment provides three types of mid-section frame module structures, and the design of the mid-section frame is mainly modularized according to the layout of the powertrain. The automobile platform usually has models with different wheelbase configurations. This embodiment is configured with three configurations: standard wheelbase, short wheelbase and long wheelbase.

[0065] Among them, the first middle section frame 2 is configured with a standard wheelbase, the second middle section frame 3 is configured with a short wheelbase, and the third middle section frame 4 is configured with a long wheelbase.

[0066] Furthermore, in this embodiment, the longitudinal beam portion of the first middle section frame 2 of the standard wheelbase can be made into a straight section, and only the length of the left and right longitudinal beams of the first middle section frame 2 is changed. Without changing other structures, the second middle section frame 3 with a short wheelbase and the third middle section frame 4 with a long wheelbase can be expanded.

[0067] Furthermore, the first middle section frame 2, the second middle section frame 3 and the second middle section frame 4 have the same structure except for the left and right longitudinal beams, and the longitudinal beams can share a set of molds, which can effectively reduce the development difficulty and manufacturing cost of the platform frame.

[0068] Embodiment 3:

[0069] like Figure 6 , 7 As shown, this embodiment provides two types of rear frame module structures, and the rear frame is mainly modularly designed according to the rear suspension form.

[0070] Among them, the rear suspension has two forms: independent suspension and non-independent suspension. The independent suspension focuses on off-road performance (referred to as the enhanced version in this embodiment), and the non-independent suspension focuses on load-bearing capacity (referred to as the load-bearing version in this embodiment). This embodiment develops a first rear section frame 5 structural module of the enhanced version for the rear independent suspension, and develops a second rear section frame 6 structural module of the load-bearing version for the non-independent rear suspension.

[0071] Furthermore, although the first rear section frame 5 and the second rear section frame 6 are quite different, both can be directly matched with the middle section frame.

[0072] Embodiment 4:

[0073] like Figure 8 , 9 As shown in FIG. 10 , this embodiment provides three types of suspension bracket module structures, and the suspension bracket is mainly modularly designed according to the vehicle body form.

[0074] Among them, the body types are mainly single-row pickup trucks, double-row pickup trucks and off-road SUVs. This embodiment designs a single-row body suspension bracket group 7, a double-row body suspension bracket group 8 and a box-type body suspension bracket group 9 according to the different body types. The single-row body suspension bracket group 7 is composed of 3 groups of suspension brackets; the double-row body suspension bracket group 8 is composed of 3 groups of suspension brackets, and another group of suspension mounting holes is located on the frame crossbeam; the box-type body suspension bracket group 9 is composed of 6 groups of suspension brackets. Some of the suspension brackets in the suspension bracket groups 7, 8 and 9 are shared. The single-row body suspension bracket group is as follows: Figure 8 As shown, the double-row body suspension bracket assembly is as follows Fig. 9 As shown, the box-type body suspension bracket assembly is as follows Fig.10 shown.

[0075] Embodiment 5:

[0076] The frame interface described in this embodiment is mainly the installation interface and welding bracket required for other systems to be installed on the frame. This embodiment reserves corresponding frame interfaces for optional configuration and expansion configuration by matching installation interfaces on the left and right longitudinal beams and cross beams, thereby realizing platformization and universalization of frame interfaces.

[0077] In some possible embodiments, a set of standardized interface protocols may be further defined to ensure compatibility and interchangeability between different modules, including unified standards for electrical connection, mechanical fixation, and data transmission.

[0078] Embodiment 6:

[0079] like Fig.11 , 12 As shown in 13, 14 and 15, this embodiment provides three main optional configurations, including an electric winch, front and rear tow hooks and a lower spare tire.

[0080] Among them, for the electric winch, an electric winch mounting beam 10 is designed, which can be directly interchangeable with the front cross beam of the front frame 1 to achieve platform-based universality. The electric winch mounting beam structure is as follows: Fig.11 shown.

[0081] Furthermore, the platform-type front tow hook 11 is designed to be installed at the front part of the front longitudinal beam 1, and the front longitudinal beam 1 reserves an installation interface for the front tow hook 11. The front tow hook structure is as follows: Fig.12 shown.

[0082] Furthermore, the rear tow hook is installed at the rear of the rear frame. According to the different structures of the reinforced first rear frame 5 and the load-bearing second rear frame 6, a reinforced first rear tow hook 12 and a load-bearing second rear tow hook 13 are developed respectively, and corresponding installation interfaces of the rear tow hooks are reserved on the first rear frame 5 and the second rear frame 6. Fig.13 and Fig.14 shown.

[0083] like Fig.15 As shown, a separate under-hanging spare tire rack is developed for the under-hanging spare tire in this embodiment.

[0084] Furthermore, after completing the preliminary platform design of the frame according to the above six embodiments, the weight, stiffness, modal and other performance of the frame were verified through simulation analysis and bench tests. For some parts that did not meet the standards, lightweight design and structural optimization were carried out to ensure that the target requirements were met.

[0085] Embodiment 7:

[0086] like Fig.16 and Fig.17 As shown, this embodiment combines and matches the five structural modules of the platform frame on the basis of the previous six embodiments to form a complete set of reinforced frame, including: a front frame 1, a first middle frame 2, a first rear frame 5, a double-row body suspension bracket group 8, an electric winch mounting beam 10, a front tow hook 11, a first rear tow hook 12 and a lower spare tire rack 14.

[0087] Embodiment 8:

[0088] like Fig.17 As shown, this embodiment combines and matches the five structural modules of the platform frame on the basis of the previous six embodiments to form a complete load-bearing plate frame, including: a front section frame 1, a third middle section frame 4, a second rear section frame 6, a single-row body suspension bracket group 7, a front towing hook 11 and a second rear towing hook 13.

[0089] Furthermore, the platform frame of the present invention can also be modularly matched according to different platform configurations to form more different embodiments.

[0090] Furthermore, the platform frame of this embodiment can effectively reduce the types of frame parts, improve the commonality of parts, and thus reduce the manufacturing cost of the frame and the management cost of parts.

[0091] Embodiment 9:

[0092] This embodiment provides a platform frame design method, including:

[0093] S100, the frame design is divided into five structural modules: front frame module, middle frame module, rear frame module, suspension bracket module and optional configuration module, each module is developed independently;

[0094] S200, modular design of the front frame module is carried out according to the front suspension form and powertrain layout;

[0095] S300, according to different requirements of wheelbase, the middle frame module is designed with adjustable length;

[0096] S400, according to the different forms of rear suspension, the rear frame module is modularly designed into a reinforced version or a load-bearing version;

[0097] S500, according to the different body types, the suspension bracket module is designed in a corresponding modular manner;

[0098] S600, design a separate optional structural module according to the optional configuration, allowing the whole vehicle to be modularized;

[0099] S700: Combine and match the five structural modules to complete the frame assembly.

[0100] Furthermore, it includes: performing platform design on the frame interface according to platform layout and configuration requirements.

[0101] Furthermore, it includes: matching installation interfaces on the left and right longitudinal beams and the cross beam, and reserving corresponding frame interfaces for optional configurations and extended configurations.

[0102] Furthermore, it includes: verifying and optimizing the frame performance through simulation analysis and bench testing to ensure that the established performance goals are met.

[0103] Furthermore, step S200 includes: modularizing the front frame module according to the form of independent suspension or non-independent suspension beam.

[0104] Furthermore, step S200 includes: modularizing the front frame module according to the two-wheel drive or four-wheel drive powertrain configuration.

[0105] Furthermore, step S300 also includes: according to different requirements of long wheelbase, short wheelbase and standard wheelbase, a length-adjustable modular design is performed on the middle frame module.

[0106] Furthermore, step S300 also includes: making the longitudinal beam part of the middle frame into a straight section, and only changing the length of the left and right longitudinal beams of the middle frame, without changing other structures, to meet the needs of vehicle models with different wheelbases.

[0107] Furthermore, step S400 includes: modularizing the rear frame module by selecting an independent suspension or a non-independent suspension beam according to off-road performance requirements or load-bearing performance requirements.

[0108] Further, step S500 includes: the suspension bracket includes a single-row vehicle body suspension bracket group 7 , a double-row vehicle body suspension bracket group 8 and a box-type vehicle body suspension bracket group 9 .

[0109] Furthermore, the optional configuration in step S700 includes an electric winch mounting beam 10 , front and rear hooks, and a lower-mounted spare tire 14 .

[0110] In some possible embodiments, intelligent sensors and monitoring systems may be integrated into the frame design to monitor key parameters such as stress, vibration, and temperature of the frame in real time, and predict potential structural fatigue or damage through data analysis to improve the safety and reliability of the vehicle.

[0111] In some possible embodiments, a specific energy absorbing structure may be designed for the front frame module and the rear frame module to disperse and absorb the impact force in a collision situation and protect the safety of passengers.

[0112] In some possible embodiments, new lightweight materials, such as high-strength steel, aluminum alloy, composite materials, etc., may be studied and applied to reduce the weight of the frame and improve fuel efficiency and dynamic response.

[0113] In some possible embodiments, considering that the off-road vehicle may run for a long time in a high temperature environment, a modular heat dissipation system may be designed for the frame, including heat sinks, air guide structures, and coolant circuits, to improve heat dissipation efficiency.

[0114] In some possible embodiments, in the optional configuration module, a module integrating multiple functions can be developed, for example, an electric winch, lighting equipment, communication equipment, etc. can be integrated into one module to improve space utilization and functionality.

[0115] In some possible embodiments, advanced simulation software may be used to perform dynamic simulation, fatigue analysis, and collision simulation of the frame design, combined with actual vehicle testing to more accurately verify the frame performance and ensure the reliability and safety of the design.

[0116] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0117] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A platform frame design method, characterized in that: include: S100, the frame design is divided into five structural modules: front frame module, middle frame module, rear frame module, suspension bracket module and optional configuration module, each module is developed independently; S200, modular design of the front frame module is carried out according to the front suspension form and powertrain layout; S300, according to different requirements of wheelbase, the middle frame module is designed with adjustable length; S400, according to the different forms of rear suspension, the rear frame module is modularly designed into a reinforced version or a load-bearing version; S500, according to the different forms of the vehicle body, the suspension bracket module is designed in a corresponding modular manner; S600, design a separate optional structural module according to the optional configuration, allowing the whole vehicle to be modularized; S700: Combine and match the five structural modules to complete the frame assembly.

2. A platform frame design method according to claim 1, characterized in that: Step S200 includes: modularizing the front frame module according to the form of independent suspension or non-independent suspension beam.

3. A platform frame design method according to claim 2, characterized in that: Step S200 includes: modularizing the front frame module according to the two-wheel drive or four-wheel drive powertrain configuration.

4. A platform vehicle frame design method according to claim 1, characterized in that: Step S300 also includes: designing a length-adjustable modular module for the middle frame module according to different requirements of a long wheelbase, a short wheelbase and a standard wheelbase.

5. A platform frame design method according to claim 4, characterized in that: Step S300 also includes: making the longitudinal beam part of the middle frame into a straight section, and only changing the length of the left and right longitudinal beams of the middle frame, without changing other structures, to meet the needs of vehicle models with different wheelbases.

6. The platform frame design method according to claim 1, characterized in that: Step S400 includes: selecting an independent suspension or a non-independent suspension beam to modularly design the rear frame module according to off-road performance requirements or load-bearing performance requirements.

7. The platform frame design method according to claim 1, characterized in that: Step S500 includes: the suspension brackets include a single-row vehicle body suspension bracket group, a double-row vehicle body suspension bracket group and a box-type vehicle body suspension bracket group.

8. The platform frame design method according to claim 1, characterized in that: The optional configurations in step S600 include an electric winch mounting beam, front and rear hooks, and a lower spare tire.

9. A platform frame design method according to any one of claims 1 to 8, characterized in that: Also includes: The frame interface is designed as a platform according to the platform layout and configuration requirements.

10. A platform vehicle frame design method according to claim 9, characterized in that: Also includes: Matching installation interfaces are provided on the left and right longitudinal beams and cross beams, and corresponding frame interfaces are reserved for optional and expanded configurations.

11. A platform frame design method according to any one of claims 1-8, characterized in that: Also includes: The frame performance is verified and optimized through simulation analysis and bench tests to ensure that the established performance targets are met.

12. A platform vehicle frame, implemented by applying the platform vehicle frame design method according to any one of claims 1 to 11, characterized in that: The five structural modules are combined and matched according to requirements to complete the assembly of different types of frames.

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