Truck container parametric modeling method and device and storage medium

Abstract

The invention relates to a truck container parametric modeling method and device and a storage medium. The method comprises the following steps: acquiring each assembly of a truck container basic model; parameters of the basic model of the cargo tank of the truck are analyzed, and fixed parameters, variable parameters and relation parameters are divided; according to the fixed parameters and the variable parameters, establishing a parameter notebook and a skeleton model supporting assembly based on assembly coordinates and an auxiliary plane, in the process of establishing the skeleton model, establishing assembly coordinates and the auxiliary plane of each part around a coordinate origin of a uniformly constructed assembly coordinate system to constrain assembly of each assembly in the basic model; parameterizing the parts through a parameter notebook and a relation; loading the sub-assemblies into the skeleton model according to the auxiliary assembly coordinate system to form a parameterized basic model; and selecting the corresponding basic model according to the vehicle model development requirement, adjusting the variable parameters in the parameter notebook, modifying the basic model to obtain the target model, and quickly completing the establishment of the target model.

Description

Technical Field

[0001] The present invention relates to the technical field of the design of the cargo box of light trucks, and more specifically, to a parametric modeling method, device and storage medium for the cargo box of trucks. Background Art

[0002] As the main carrier for transporting goods, the cargo boxes of light trucks have a variety of customer groups. According to different customer requirements, the truck load, overall dimensions, chassis layout, etc. are all different. For the design of the cargo box of a truck, numerous parameters need to be considered and relevant geometric calculations need to be carried out to determine the design drawings. The traditional design mode relies on the experience of designers and relevant design standards, and draws design drawings from beginning to end. The design efficiency is low, the repetitive workload is large, and problems are prone to occur in the parameter matching of each part, resulting in design defects that cannot be assembled or processed. In short, using the traditional design method for the design of the cargo box of a truck has the disadvantages of a long design cycle, high cost, and easy errors. Therefore, how to fundamentally solve the defects such as a long design cycle, high cost, and easy errors in the design of the cargo boxes of various types of trucks, and provide a parametric modeling method for the cargo box of a truck is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a parametric modeling method, device and storage medium for the cargo box of a truck.

[0004] In the first aspect, the present invention provides a parametric modeling method for the cargo box of a truck, including:

[0005] The first step: Analyze the basic model of the cargo box of the truck to obtain each assembly of the basic model of the cargo box of the truck;

[0006] The second step: Analyze the parameters of the basic model of the cargo box of the truck, and divide the parameters into three types of attributes: fixed parameters, variable parameters and relationship parameters. Among them, the variable parameters are the parameters directly specified according to external requirements, and the relationship parameters are the parameters calculated from the variable parameters and the fixed parameters according to the set relationship;

[0007] The third step: Through the analysis of the fixed parameters and variable parameters in the second step, establish a parameter notepad and a skeleton model that supports assembly based on the assembly coordinates and auxiliary planes. During the process of establishing the skeleton model, establish the assembly coordinates and auxiliary planes of each component around the coordinate origin of the uniformly constructed assembly coordinate system to constrain the assembly of each assembly in the basic model;

[0008] The fourth step: Parametrize the part parameters of the basic model;

[0009] Step 5: After the parts are parameterized, each sub-assembly is installed into the skeleton model according to the auxiliary assembly coordinate system, and a basic model containing each parameterized assembly is formed through the auxiliary assembly method of the auxiliary assembly coordinate system;

[0010] Step 6: When developing the deformation of the truck cargo box, draw a two-dimensional layout diagram according to the vehicle model development requirements, select the corresponding basic model, adjust the variable parameters in the parameter notepad of the selected basic model, modify the basic model to obtain the target model, and quickly complete the establishment of the target model.

[0011] Furthermore, the basic model of the truck cargo box is divided into floor assembly, front panel assembly, rear panel assembly, front side panel assembly, rear side panel assembly, middle pillar assembly, left rear pillar assembly, and right rear pillar assembly modules according to the model assembly relationship.

[0012] Furthermore, the establishment of a skeleton model that supports assembly based on the assembly coordinate and auxiliary plane includes:

[0013] Unify the construction of the assembly coordinate system;

[0014] Establish the assembly coordinates and auxiliary planes of each component around the coordinate origin of the assembly coordinate system in the skeleton model;

[0015] The carriage assembly, floor assembly, front panel assembly, rear panel assembly, front side panel assembly, rear side panel assembly, middle pillar assembly, left rear pillar assembly, and right rear pillar assembly perform component assembly through the auxiliary coordinate system and auxiliary plane.

[0016] Furthermore, the assembly coordinate system takes the plane passing through the center of the vehicle's rear axle and perpendicular to the ground as the XO plane, the upper wing surface of the upper mounting floor crossbeam as the YO plane, and the plane passing through the vehicle's central axis and perpendicular to the ground as the ZO plane. The coordinate origin ACS takes the direction perpendicular to the X0 plane as the x-axis and points in the opposite direction of the vehicle's driving direction as the positive direction, the direction perpendicular to the YO plane as the y-axis and points directly above the vehicle as the positive direction, and the direction perpendicular to the ZO plane as the z-axis and points in the direction of the vehicle's main driver as the positive direction.

[0017] Furthermore, through the declaration method, the variable parameters set in the parameter notepad are written into each part model, calculation relationships are established in the part model, each variable is specified, and the part parameters of the basic model are parameterized.

[0018] Furthermore, when developing the deformation of the truck cargo box, variable parameters are obtained through the external chassis drawing and the cargo box layout drawing.

[0019] Furthermore, the verification of the target model includes: performing the design verification of the target model, including: checking the parameter boundaries; checking the interference of the target model; performing the simulation analysis of the target model, including: establishing the ANSYS co-simulation interface; automatically generating the FEM mesh of the target model for mechanical and kinematic simulations.

[0020] Furthermore, the automatic drawing of the engineering drawing of the target model includes:

[0021] Construct a view projection matrix, and project the generated target model according to the view projection matrix to construct corresponding views;

[0022] BOM table generation: Traverse the assembly tree using a recursive algorithm. If a child node of the assembly tree is selected, check whether the child node is a part. If it is a part, add the part to the BOM table. If not, iteratively check the child nodes of the child node.

[0023] In a second aspect, the present invention provides a parametric modeling device for a truck cargo box, including: at least one processing unit, the processing unit is connected to a storage unit through a bus unit, the storage unit stores a computer program, and when the computer program is executed by the processing unit, the parametric modeling method of the truck cargo box is implemented.

[0024] In a third aspect, the present invention provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the parametric modeling method of the truck cargo box is implemented.

[0025] The above technical solutions provided by the embodiments of the present invention have the following advantages compared with the prior art:

[0026] The present invention obtains each assembly of the basic model of the truck cargo box; analyzes the parameters of the basic model of the truck cargo box, and divides them into fixed parameters, variable parameters, and relationship parameters; according to the fixed parameters and variable parameters, establish a parameter notepad and a skeleton model that supports assembly based on the assembly coordinates and auxiliary planes. During the establishment of the skeleton model, establish the assembly coordinates and auxiliary planes of each component around the coordinate origin of the unified constructed assembly coordinate system to constrain the assembly of each assembly in the basic model; the parameter notepad and relationship parameterize the parts; install each sub-assembly into the skeleton model according to the auxiliary assembly coordinate system to form a parametric basic model; select the corresponding basic model according to the vehicle model development requirements, adjust the variable parameters in the parameter notepad, and modify the basic model to obtain the target model, quickly completing the establishment of the target model. This application associates the digital model with the parameters, and the design of the parameter notepad facilitates changing the parameters. After changing the parameters in the parameter notepad, all related digital models will change, and the target model can be quickly obtained. This application will assemble through the assembly coordinate system and auxiliary planes, without being associated with the parts themselves, reducing assembly constraint errors after changing the digital model. Description of the Drawings

[0027] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a flowchart of a parametric modeling method for the cargo box of a truck provided by an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of a cargo box assembly of a truck provided by an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of a notepad for fixed parameters and variable parameters provided by an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of a skeleton model tree provided by an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the assembly coordinates and auxiliary planes of a skeleton model provided by an embodiment of the present invention;

[0034] Figure 6 It is a schematic diagram of a calculation formula for parameter relationships provided by an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the assembly of a bottom plate assembly provided by an embodiment of the present invention;

[0036] Figure 8 It is a two-dimensional cargo box layout diagram of a target model provided by an embodiment of the present invention;

[0037] Figure 9 It is a schematic diagram of a parametric modeling device for the cargo box of a truck provided by an embodiment of the present invention.

[0038] The numbers and their meanings in the figure are as follows: 1. Bottom plate assembly; 2. Front plate assembly; 3. Rear plate assembly; 4. Front side plate assembly; 5. Rear side plate assembly; 6. Middle column assembly; 7. Left rear column assembly; 8. Right rear column assembly. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0041] Embodiment 1

[0042] The object of the present invention is to provide a parametric modeling method for the cargo box of a truck, which can quickly obtain the target model by changing the parameter setting value on the basis model, and can save a large amount of modeling time and 2D drawing time for design engineers.

[0043] As Figure 1 shown, a parametric modeling method for the cargo box of a truck provided includes:

[0044] The first step: Analyze the basic model of the cargo box of the truck to obtain each assembly of the basic model of the cargo box of the truck. In the specific implementation process, as Figure 2 shown, the basic model of the cargo box of the truck is divided into a bottom plate assembly 1, a front plate assembly 2, a rear plate assembly 3, a front side plate assembly 4, a rear side plate assembly 5, a middle column assembly 6, a left rear column assembly 7, and a right rear column assembly 8 according to the model assembly relationship.

[0045] The second step: Analyze the parameters of the basic model of the cargo box of the truck, and divide the parameters into three types of attributes: fixed parameters, variable parameters and relationship parameters. Among them, the variable parameters are the parameters directly specified according to external requirements, and the relationship parameters are the parameters calculated from the variable parameters and the fixed parameters according to the set relationship.

[0046] In the design of the cargo box, one kind of fixed parameters, variable parameters and relationship parameters are as follows: Fixed parameters: material yield strength; Variable parameters: cargo box length L; Relationship parameters: If the material yield strength is greater than the set threshold, the side plate thickness D is: D = L / k1 + 2.5; if the material yield strength is not greater than the set threshold, the side plate thickness D is: D = L / k2 + 3.5.

[0047] The third step: As Figure 3 and Figure 4 shown, establish a parameter notepad and a skeleton model that supports assembly based on the assembly coordinates and auxiliary planes through the fixed parameters and variable parameters analyzed in the second step; as Figure 5As shown in the figure, during the establishment of the skeleton model, the assembly coordinates and auxiliary planes of each component are established around the origin of the assembly coordinate system to constrain the assembly of each assembly in the basic model.

[0048] Skeleton modeling is to perform top-level definition and design on the truck cargo box. First, define the overall modules, structures, and their relationships of the truck cargo box to obtain a skeleton model that can map the overall framework of the truck cargo box. Then, define and match the relationships between each part according to the skeleton model. Finally, according to the relationships between each module or component in the top-level definition, specifically allocate the relationships between each product part, and finally complete the design and modeling of each part. The relationship between the whole and the part is defined and constrained through the relational expressions or parameters in the parameter notebook. Modify the skeleton or part among them, and the other parts associated with it will also change accordingly. Realize that the whole constrains the part, and the modification of the part affects the whole.

[0049] Establishing the basic model based on the skeleton model includes:

[0050] First, uniformly construct the assembly coordinate system: Take the plane passing through the center of the vehicle's rear axle and perpendicular to the ground as the XO plane, the upper wing surface of the crossbeam of the upper mounting floor as the YO plane, and the plane passing through the vehicle's central axis and perpendicular to the ground as the ZO plane. The origin of the coordinate ACS takes the direction perpendicular to the X0 plane as the positive direction of the x-axis pointing in the opposite direction of the vehicle's driving direction, the direction perpendicular to the YO plane as the positive direction of the y-axis pointing directly above the vehicle, and the direction perpendicular to the ZO plane as the positive direction of the z-axis pointing in the direction of the vehicle's driver's cab. The modeling benchmark of the basic model is unified through the uniformly constructed assembly coordinate system.

[0051] In the skeleton model, establish the assembly coordinates and auxiliary planes of each component around the origin of the assembly coordinate system.

[0052] During the implementation process, through the assembly of the assembly coordinate system, component assembly coordinates, and auxiliary planes, without being associated with the part itself, reduce the assembly constraint errors after the change of the part model.

[0053] Step 4: Parametrize the part parameters of the basic model using the parameter notebook and parameter relationships;

[0054] Through the declaration method, write the fixed parameters and variable parameters set in the parameter notebook into each part model, establish calculation relationships in the part model, specify each variable, and parametrize the part parameters of the basic model. Specifically, the parameter notebook declares the global variables of the fixed parameters and variable parameters. Establish the calculation relationship of the relational parameters through the relationship between the parameters, as Figure 6 shown. Use user-defined features to specify each variable.

[0055] Step 5: Install each sub-assembly of the truck cargo box into the skeleton model according to the assembly coordinates and auxiliary planes to form a basic model including a parametric bottom plate assembly, front plate assembly, rear plate assembly, front side plate assembly, rear side plate assembly, middle column assembly, left rear column assembly, right rear column assembly, and carriage assembly; the bottom plate assembly of the basic model is assembled as shown in Figure 7 shown.

[0056] Step 6: Product deformation development: Draw a two-dimensional cargo box layout diagram according to the vehicle model development requirements, as shown in Figure 8 shown, select the corresponding basic model, adjust the variable parameters in the parameter notepad, and quickly complete the establishment of the target model. When developing the deformation of the truck cargo box, obtain the variable parameters through the external supply diagram of the truck chassis and the cargo box layout diagram.

[0057] After the target model is completed, verify the target model, including: performing the design verification of the target model, including: checking the parameter boundaries; checking the interference of the target model; performing the simulation analysis of the target model, including: establishing the ANSYS co-simulation interface; automatically generating the FEM mesh of the target model for mechanical and kinematic simulations.

[0058] After the target model is completed, realize the automatic drawing of the engineering drawing of the target model, including:

[0059] Construct a view projection matrix, and project the corresponding views according to the view projection matrix for the target model generated by projection.

[0060] BOM table generation: Traverse the assembly tree using a recursive algorithm. If the child node of the assembly tree is selected, check whether the child node is a part. If it is a part, add the part to the BOM table. If not, iteratively check the child nodes of this child node.

[0061] Embodiment 2

[0062] Refer to Figure 9 shown, an embodiment of the present invention provides a parametric modeling device for a truck cargo box, including: at least one processing unit, the processing unit is connected to a storage unit through a bus unit, and the storage unit is used as a computer-readable storage medium and can be used to store software programs, computer-executable programs, and modules, such as the software programs, computer-executable programs, and modules corresponding to a parametric modeling method for a truck cargo box in an embodiment of the present invention. The processing unit realizes the above-mentioned parametric modeling method for a truck cargo box by running the software programs, computer-executable programs, and modules stored in the storage unit, including:

[0063] Step 1: Analyze the basic model of the truck cargo box to obtain each truck cargo box assembly;

[0064] Step 2: Analyze the parameters of the basic model of the truck cargo box, and divide the parameters into three types of attributes: fixed parameters, variable parameters, and relationship parameters. Among them, the variable parameters are the parameters directly specified according to external requirements, and the relationship parameters are the parameters calculated from the variable parameters and the fixed parameters according to the set relationship;

[0065] Step 3: Establish a parameter notepad and a skeleton model that supports assembly based on the assembly coordinates and auxiliary planes through the fixed parameters and variable parameters. During the process of establishing the skeleton model, establish the assembly coordinates and auxiliary planes of each component around the coordinate origin of the uniformly constructed assembly coordinate system to constrain the assembly of each assembly in the basic model;

[0066] Step 4: Parametrize the part parameters of the basic model by using the parameter notepad and parameter relationships;

[0067] Step 5: After the part parametrization, install each sub-assembly into the skeleton model according to the auxiliary assembly coordinate system, and form a basic model including the parametrized bottom plate assembly, front plate assembly, rear plate assembly, front side plate assembly, rear side plate assembly, middle pillar assembly, left rear pillar assembly, right rear pillar assembly, and carriage assembly through the auxiliary assembly coordinate system-assisted assembly method;

[0068] Step 6: When developing the deformation of the truck cargo box, draw a two-dimensional layout diagram according to the vehicle model development requirements, select the corresponding basic model, adjust the variable parameters in the parameter notepad of the selected basic model, and modify the basic model to obtain the target model, so as to quickly complete the establishment of the target model.

[0069] Of course, the computer program stored in the storage unit of a truck cargo box parametric modeling device provided by an embodiment of the present invention is not limited to the method operations described above, and can also execute the related operations in a truck cargo box parametric modeling method provided by any embodiment of the present invention.

[0070] Embodiment 3

[0071] An embodiment of the present invention provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program, which when executed, implements the truck cargo box parametric modeling method, including:

[0072] Step 1: Analyze the basic model of the truck cargo box to obtain each truck cargo box assembly;

[0073] Step 2: Analyze the parameters of the basic model of the truck cargo box, and divide the parameters into three types of attributes: fixed parameters, variable parameters, and relationship parameters. Among them, the variable parameters are the parameters directly specified according to external requirements, and the relationship parameters are the parameters calculated from the variable parameters and the fixed parameters according to the set relationship;

[0074] Step 3: Establish a parameter notepad with fixed and variable parameters and create a skeleton model that supports assembly based on the assembly coordinates and auxiliary planes. During the creation of the skeleton model, establish the assembly coordinates and auxiliary planes of each component around the origin of the assembly coordinate system built uniformly to constrain the assembly of each assembly in the basic model;

[0075] Step 4: Parametrize the part parameters of the basic model using the parameter notepad and parameter relationships;

[0076] Step 5: After the parts are parametrized, install each sub-assembly into the skeleton model according to the auxiliary assembly coordinate system, and form a basic model including the parametrized floor assembly, front panel assembly, rear panel assembly, front side panel assembly, rear side panel assembly, middle pillar assembly, left rear pillar assembly, right rear pillar assembly, and carriage assembly through the auxiliary assembly method of the auxiliary assembly coordinate system;

[0077] Step 6: When developing the deformation of the truck cargo box, draw a two-dimensional layout diagram according to the vehicle model development requirements, select the corresponding basic model, adjust the variable parameters in the parameter notepad of the selected basic model, modify the basic model to obtain the target model, and quickly complete the establishment of the target model.

[0078] A computer-readable storage medium provided by an embodiment of the present invention stores a computer program that is not limited to the method operations described above, and can also execute related operations in a method for parametric modeling of a truck cargo box provided by any embodiment of the present invention.

[0079] In the embodiments provided by the present invention, it should be understood that the disclosed structure and method can be implemented in other ways. For example, the structural embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of structures or units can be in electrical, mechanical or other forms.

[0080] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0081] In addition, in each embodiment of the present invention, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0082] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for parametric modeling of a truck cargo box, characterized in that: include: Step 1: Analyze the basic model of the truck box to obtain the assembly of each truck box; Step 2: Analyze the parameters of the basic model of the truck box and divide the parameters into three attributes: fixed parameters, variable parameters and relational parameters. The variable parameters are parameters directly specified according to external requirements, and the relational parameters are parameters calculated by variable parameters and fixed parameters according to the set relationship. Step 3: Use fixed parameters and variable parameters to create a parameter notepad and a skeleton model that supports assembly based on assembly coordinates and auxiliary planes. In the process of establishing the skeleton model, the assembly coordinates and auxiliary planes of each component are established around the coordinate origin of the uniformly constructed assembly coordinate system to constrain each assembly in the basic model. Step 4: Use the parameter notepad and parameter relationships to parameterize the parts of the basic model; Step 5: After the parts are parameterized, each sub-assembly is loaded into the skeleton model according to the auxiliary assembly coordinate system, and a basic model containing each parameterized assembly is formed by auxiliary assembly of the auxiliary assembly coordinate system; Step 6: When developing the deformation of the truck box, draw a two-dimensional layout diagram according to the vehicle model development requirements, select the corresponding basic model, adjust the variable parameters in the parameter notepad of the selected basic model, modify the basic model to obtain the target model, and quickly complete the establishment of the target model.

2. The method for parametric modeling of a truck cargo box according to claim 1, characterized in that: According to the model assembly relationship, the basic model of the truck cargo box is divided into bottom plate assembly, front plate assembly, rear plate assembly, front side plate assembly, rear side plate assembly, center pillar assembly, left rear pillar assembly, and right rear pillar assembly modules.

3. The method for parametric modeling of a truck cargo box according to claim 1, characterized in that: Building a skeleton model that supports assembly based on assembly coordinates and auxiliary planes includes: Unified construction of assembly coordinate system; Establish assembly coordinates and auxiliary planes of each component around the origin of the assembly coordinate system in the skeleton model; The car body assembly, floor assembly, front panel assembly, rear panel assembly, front side panel assembly, rear side panel assembly, center pillar assembly, left rear pillar assembly and right rear pillar assembly are assembled through auxiliary coordinate systems and auxiliary planes.

4. The method for parametric modeling of a truck cargo box according to claim 3, characterized in that: The assembly coordinate system takes the plane passing through the center of the rear axle of the vehicle and perpendicular to the ground as the XO plane, the upper wing surface of the upper bottom plate crossbeam as the YO plane, the plane passing through the center axis of the vehicle and perpendicular to the ground as the ZO plane, and the coordinate origin ACS takes the x-axis perpendicular to the X0 plane and points to the opposite direction of the vehicle's travel direction as the positive direction, takes the y-axis perpendicular to the YO plane and points to directly above the vehicle as the positive direction, and takes the z-axis perpendicular to the ZO plane and points to the direction of the vehicle's main driver as the positive direction.

5. The method for parametric modeling of a truck cargo box according to claim 1, characterized in that: By declarative means, the fixed parameters and variable parameters set in the parameter notebook are written into each part model, calculation relationships are established in the part model, and each variable is specified to parameterize the parts of the basic model.

6. The method for parametric modeling of a truck cargo box according to claim 1, characterized in that: When developing the deformation of the cargo box of a truck, variable parameters are obtained through the chassis external drawing and the cargo box layout drawing.

7. The method for parametric modeling of a truck cargo box according to claim 1, characterized in that: Verification of the target model includes: performing design verification of the target model, including: checking parameter boundaries; checking interference of the target model; performing simulation analysis of the target model, including: establishing an ANSYS collaborative simulation interface; and automatically generating FEM mesh of the target model for mechanical and kinematic simulation.

8. The method for parametric modeling of a truck cargo box according to claim 1, characterized in that: Automatic drawing of engineering drawings of target models, including: Construct a view projection matrix, and project the generated target model according to the view projection matrix to construct the corresponding view; BOM table generation: Use a recursive algorithm to traverse the assembly tree. If a child node of the assembly tree is selected, check whether the child node is a part. If it is a part, add the part to the BOM table. If not, iteratively check the child nodes of the child node.

9. A parametric modeling device for a cargo box of a truck, characterized in that: include: At least one processing unit, the processing unit is connected to a storage unit via a bus unit, the storage unit stores a computer program, and when the computer program is executed by the processing unit, the parametric modeling method for a truck cargo box as described in any of claims 1-8 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for parametric modeling of a truck box as described in any one of claims 1 to 8 is implemented.

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