A method for assembling constraints of a three-dimensional model of positioning parameters of a double wishbone front suspension

Abstract

The application provides a kind of double fork arm front suspension positioning parameter three-dimensional model assembly constraint method, comprising: based on the geometric model of three-dimensional simulation software, the structure is layered, and the structure tree is formed;The third layer of structure tree is sequentially assembled to obtain the front suspension subassembly assembly;Wheel hub bearing assembly, front brake disc, front suspension lower swing arm ball head seat and steering knuckle of the second layer of structure tree are assembled to obtain the steering knuckle assembly;The upper top seat, body-in-white, front subframe assembly tooling and front suspension subassembly assembly of the second layer of structure tree are assembled to obtain the body front suspension partial assembly;The body front suspension partial assembly and the front shock absorber strut of the second layer of structure tree, double fork arm assembly are obtained to obtain the body front suspension assembly;The steering knuckle assembly and the body front suspension assembly are assembled to obtain the front suspension positioning parameter simulation model.The application improves the compliance of simulation model assembly constraint method and actual process, and improves the accuracy of simulation analysis result.

Description

Technical Field

[0001] This invention relates to the field of automotive assembly technology, and more specifically, to an assembly constraint method, system, electronic device, and storage medium for a three-dimensional model of a double wishbone front suspension positioning parameters. Background Technology

[0002] The three-dimensional dimensional deviation simulation analysis of four-wheel alignment parameter deviations is a crucial step in the vehicle chassis design and development process. Through three-dimensional dimensional deviation simulation in the early design phase, the manufacturing qualification rate of the design scheme can be checked, the design scheme can be optimized, and ultimately the functional requirements of the chassis design can be achieved.

[0003] The assembly method of the parts and the degree-of-freedom constraint method are the key links in the static model of the three-dimensional deviation simulation of the suspension. The rationality of these links determines the accuracy of the simulation analysis results.

[0004] Currently, the commonly used assembly constraint methods in front suspension static deviation simulation models are as follows: Figure 1 As shown. However, Figure 1 The commonly used assembly constraint method shown in the flowchart has the following problem: When assembling and tightening the steering knuckle assembly and connecting rod, one end is self-positioned on the lower left control arm of the front suspension, and the other end is self-positioned on the vehicle body. However, the actual process involves tightening the upper mounting of the steering knuckle assembly to the vehicle body, and then simultaneously pre-assembling the lower control arm of the front suspension, the steering connecting rod, and the steering knuckle assembly, as well as the upper mounting, before tightening them in stages. This scheme greatly simplifies the modeling process, but the difference from the actual assembly process reduces the accuracy of the simulation analysis results. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art by providing an assembly constraint method, system, electronic device, and storage medium for a three-dimensional model of double wishbone front suspension positioning parameters. The assembly constraint method using a static model of the simulation of three-dimensional dimensional deviations of double wishbone front suspension positioning parameters solves the difference between commonly used assembly constraint methods for static models of double wishbone front suspension simulation and actual assembly processes, matches the actual assembly constraint scheme, and reduces the three-dimensional dimensional deviations of double wishbone front suspension positioning parameters.

[0006] According to a first aspect of the present invention, an assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters is provided, comprising:

[0007] The geometric model based on 3D simulation software is used to layer the structural components to form a structure tree;

[0008] The front subframe, steering tie rod, left lower control arm rear mount, left lower control arm front mount, and front suspension left lower control arm of the third layer of the structure tree are assembled sequentially to obtain the front suspension sub-assembly of the second layer of the structure tree.

[0009] The wheel hub bearing assembly, front brake disc, front suspension lower control arm ball joint seat, and steering knuckle are assembled in the second layer of the structure tree to obtain the steering knuckle assembly;

[0010] The upper top mount, body-in-white, front subframe assembly tooling, and front suspension sub-assembly of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0011] The front suspension assembly of the vehicle body and the front shock absorber strut and double wishbone of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0012] The steering knuckle assembly is assembled with the front suspension assembly of the vehicle body to obtain a simulation model of the front suspension positioning parameters.

[0013] Based on the above technical solution, the present invention can also be improved as follows.

[0014] Optionally, the geometric model based on 3D simulation software is used to layer the structural components to form a structure tree, including:

[0015] Based on the geometric model of the 3D simulation software, all the simulation structural components required for the 3D model of the front suspension positioning parameters are divided into three layers. The first layer is the simulation model of the front suspension positioning parameters, which contains all the structural components of the second layer, and the second layer contains all the structural components of the third layer.

[0016] Optionally, the front subframe, steering tie rod, left lower control arm rear mount, left lower control arm front mount, and front suspension left lower control arm of the third layer of the structure tree are assembled sequentially to obtain the front suspension sub-assembly of the second layer of the structure tree, including:

[0017] The steering tie rod is assembled with the front subframe via a stepped assembly, constrained by six degrees of freedom in the vehicle coordinate system to obtain the first front suspension sub-assembly. Specifically, the steering tie rod is assembled with the main positioning hole of the front subframe, controlling the XYZ directions; the steering tie rod is assembled with the auxiliary positioning hole of the front subframe, controlling the XZ directions; and the steering tie rod is assembled with the tightening point of the front subframe, controlling the Z direction.

[0018] Based on the first front suspension sub-assembly, the rear mounting bracket of the lower left control arm is locked to the front subframe through the overlapping surface, constraining 6 degrees of freedom, thus obtaining the second front suspension sub-assembly:

[0019] Based on the second front suspension sub-assembly, the front mounting bracket of the lower left control arm and the front subframe are locked together through the overlapping surface, constraining 6 degrees of freedom, thus obtaining the third front suspension sub-assembly:

[0020] Based on the third sub-assembly of the front suspension, the circular shaft at one end of the lower left control arm of the front suspension is connected to the circular hole of the rear mounting seat of the lower left control arm, and the circular hole at the other end of the lower left control arm of the front suspension is connected to the front mounting seat of the lower left control arm, thus constraining 5 degrees of freedom. The 5 degrees of freedom refer to the displacement in the X, Y, and Z directions and the rotation around the Y and Z axes, thus obtaining the second layer of the front suspension sub-assembly of the structure tree.

[0021] Optionally, the assembly of the wheel hub bearing assembly, front brake disc, front suspension lower control arm ball joint seat, and steering knuckle in the second layer of the structure tree to obtain the steering knuckle assembly includes:

[0022] The wheel hub bearing assembly of the second layer of the structure tree is assembled onto the front brake disc and constrained with 6 degrees of freedom based on the vehicle coordinate system to obtain the front brake disc assembly; the lower control arm ball joint of the front suspension is assembled onto the steering knuckle and constrained with 6 degrees of freedom based on the vehicle coordinate system to obtain the first steering knuckle assembly.

[0023] The steering knuckle assembly is assembled onto the front brake disc assembly via an automatic bending command, constraining 6 degrees of freedom to obtain the steering knuckle assembly.

[0024] Optionally, the assembly of the upper top mount, body-in-white, front subframe assembly fixture, and front suspension sub-assembly assembly in the second layer of the structure tree to obtain the front suspension assembly of the vehicle body includes:

[0025] The front subframe assembly fixture of the second layer of the structure tree is assembled onto the vehicle body. The front subframe of the front suspension sub-assembly is assembled onto the second front suspension assembly of the vehicle body through the front subframe assembly fixture, constraining 6 degrees of freedom.

[0026] The upper mount is assembled onto the white body, and six degrees of freedom are constrained to obtain the front suspension assembly of the vehicle body.

[0027] Optionally, the assembly of the front suspension assembly and the front shock absorber strut and double wishbone in the second layer of the structure tree includes:

[0028] The six degrees of freedom of the lower left control arm of the front suspension are constrained by a rotational assembly method;

[0029] The front shock absorber strut of the second layer of the structure tree is assembled to the upper top mount of the front suspension assembly and the lower left control arm of the front suspension using a two-point assembly method.

[0030] The double wishbone is assembled to the body-in-white of the front suspension assembly through a two-point assembly, and the double wishbone is assembled to the theoretical angle through a rotation assembly.

[0031] Optionally, assembling the steering knuckle assembly with the front suspension assembly includes:

[0032] The steering knuckle assembly is assembled to the double wishbone and the lower left control arm of the front suspension assembly of the vehicle body through two-point assembly;

[0033] The steering knuckle assembly rotates along its assembly point with the double wishbone and the lower left control arm of the front suspension until the end of the steering tie rod is assembled onto the corresponding pre-reserved assembly point on the steering knuckle assembly.

[0034] According to a second aspect of the present invention, an assembly constraint system for a three-dimensional model of a double wishbone front suspension positioning parameters is provided, comprising:

[0035] The structure tree construction module uses the geometric model of 3D simulation software to layer structural components and form a structure tree.

[0036] The front suspension sub-assembly assembly module assembles the front subframe, steering tie rod, left lower control arm rear mount, left lower control arm front mount, and front suspension left lower control arm in sequence from the third layer of the structure tree to obtain the front suspension sub-assembly assembly from the second layer of the structure tree.

[0037] The steering knuckle assembly module assembles the wheel hub bearing assembly, front brake disc, and front suspension lower control arm ball joint from the second layer of the structure tree with the steering knuckle to obtain the steering knuckle assembly;

[0038] The front suspension assembly module assembles the upper top mount, body-in-white, front subframe assembly tooling, and front suspension sub-assembly assembly in the second layer of the structure tree to obtain the front suspension assembly.

[0039] The front suspension assembly module assembles the front suspension assembly and the front shock absorber strut and double wishbone of the second layer of the structure tree to obtain the front suspension assembly.

[0040] The model assembly module assembles the steering knuckle assembly with the front suspension assembly of the vehicle body to obtain a simulation model of the front suspension positioning parameters.

[0041] According to a third aspect of the present invention, an electronic device is provided, including a memory and a processor, wherein the processor is configured to execute a computer management program stored in the memory to implement the steps of the above-described assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters.

[0042] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer management class program is stored, wherein when executed by a processor, the computer management class program implements the steps of the above-described assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters.

[0043] This invention provides an assembly constraint method, system, electronic device, and storage medium for a three-dimensional model of double wishbone front suspension positioning parameters. It matches the actual assembly constraint scheme, reduces the three-dimensional dimensional deviation of the double wishbone front suspension positioning parameters, improves the conformity between the simulation model assembly constraint method and the actual process, and enhances the accuracy of simulation analysis results, thereby ensuring the production and manufacturing qualification rate. Attached Figure Description

[0044] Figure 1 The flowchart shows the assembly constraint method for the existing three-dimensional model of the positioning parameters of the double wishbone front suspension mentioned in the background art.

[0045] Figure 2 A flowchart of an assembly constraint method for a three-dimensional model of positioning parameters of a double wishbone front suspension provided by the present invention;

[0046] Figure 3 A hierarchical diagram of the structure tree provided by the present invention;

[0047] Figure 4 This is an assembly diagram of step S3 in the embodiment;

[0048] Figure 5 This is an assembly diagram of step S4 in the embodiment;

[0049] Figure 6 This is an assembly diagram of step S6 in the embodiment;

[0050] Figure 7 This is a schematic diagram of the assembly in step S8 of the embodiment;

[0051] Figure 8 This is a schematic diagram of the assembly in step S9 of the embodiment;

[0052] Figure 9 This is an assembly diagram of step S10 in the embodiment;

[0053] Figure 10 This is an assembly diagram of step S11 in the embodiment;

[0054] Figure 11 This is an assembly diagram of step S12 in the embodiment;

[0055] Figure 12 This is an assembly diagram of step S13 in the embodiment;

[0056] Figure 13 This is an assembly diagram of step S14 in the embodiment;

[0057] Figure 14 This invention provides a structural block diagram of the assembly constraint system for a three-dimensional model of the positioning parameters of a double wishbone front suspension.

[0058] Figure 15 A schematic diagram of the hardware structure of a possible electronic device provided by the present invention;

[0059] Figure 16 This is a schematic diagram of the hardware structure of a possible computer-readable storage medium provided by the present invention.

[0060] The attached diagram lists the components represented by each number as follows:

[0061] 1. Simulation model of front suspension positioning parameters; 21. Body-in-white; 22. Front suspension lower control arm ball joint; 23. Steering knuckle; 24. Wheel hub bearing assembly; 25. Front brake disc; 26. Upper top mount; 27. Front shock absorber strut; 28. Double wishbone; 29. ​​Front subframe assembly fixture; 30. Front suspension sub-assembly assembly; 31. Front subframe; 32. Steering tie rod; 33. Rear mounting bracket of lower left control arm; 34. Front mounting bracket of lower left control arm; 35. Lower left control arm of front suspension. Detailed Implementation

[0062] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0063] Figure 2 A flowchart of an assembly constraint method for a three-dimensional model of positioning parameters of a double wishbone front suspension provided by the present invention is shown below. Figure 2 As shown, the method includes:

[0064] Based on the geometric model of 3D simulation software, structural components are layered to form a structure tree. The hierarchical structure of the structure tree is as follows: Figure 3 As shown;

[0065] Will Figure 3 The front subframe 31, steering tie rod 32, left lower control arm rear mount 33, left lower control arm front mount 34 and front suspension left lower control arm 35 of the third layer of the middle structure tree are assembled in sequence to obtain the front suspension sub-assembly 30 of the second layer of the structure tree.

[0066] The wheel hub bearing assembly 24, front brake disc 25, and front suspension lower control arm ball joint seat 22 in the second layer of the structure tree are assembled with the steering knuckle 23 to obtain the steering knuckle assembly;

[0067] The upper top seat 26, body-in-white 21, front subframe assembly tool 29 and front suspension sub-assembly 30 of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0068] The front suspension assembly of the vehicle body and the front shock absorber strut 27 and double wishbone 28 of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0069] The steering knuckle assembly is assembled with the front suspension assembly of the vehicle body to obtain the simulation model 1 of the front suspension positioning parameters.

[0070] Understandably, given the deficiencies in the background technology, this invention proposes an assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters. First, all structural components required for the model are arranged hierarchically in a structure tree format, such as... Figure 3 As shown, the first layer is the overall model. The second layer includes: front suspension sub-assembly 30, wheel bearing assembly 24, front brake disc 25, front suspension lower control arm ball joint 22, steering knuckle 23, upper top mount 26, body-in-white 21, front subframe assembly fixture 29, front shock absorber strut 27, and double wishbone 28. It's worth noting that the front subframe assembly fixture 29 is a virtual dataset used to simulate the actual fixture positioning. The third layer includes: front subframe 31, steering tie rod 32, left lower control arm rear mounting bracket 33, left lower control arm front mounting bracket 34, and front suspension left lower control arm 35. The third layer structure can be assembled to form the front suspension sub-assembly 30 of the second layer. Then, all structural components are assembled according to the hierarchy in the 3D simulation model, finally obtaining the front suspension positioning parameter simulation model 1. The method in this embodiment is more closely matched to the actual assembly constraint scheme in the production process, reduces the three-dimensional dimensional deviation of the double wishbone front suspension positioning parameters, improves the conformity between the simulation model assembly constraint method and the actual process, and enhances the accuracy of the simulation analysis results, thereby ensuring the production and manufacturing qualification rate.

[0071] In one possible embodiment, the geometric model based on 3D simulation software layers the structural components to form a structure tree, including:

[0072] Based on the geometric model of the 3D simulation software, all the simulation structural components required for the 3D model of the front suspension positioning parameters are divided into three layers. The first layer is the front suspension positioning parameter simulation model 1, which contains all the structural component elements of the second layer, and the second layer contains all the structural component elements of the third layer.

[0073] Specifically, such as Figure 2 Flowchart and Figure 3 As shown in the tree structure diagram, this embodiment includes the following steps in actual operation:

[0074] S1, import the digital models of the parts related to the front suspension four-wheel alignment parameters into CATIA software, and then follow the steps as follows: Figure 3 The structure tree shown organizes the hierarchical relationship, where the front suspension assembly tooling is a virtual dataset used to simulate the positioning of the actual tooling;

[0075] S2. Import the completed geometric model into 3D simulation software, such as 3DCS software.

[0076] It is understandable that in this embodiment, the data models of the relevant structural components involved in the three-dimensional model of the double wishbone front suspension positioning parameters are set in layers and imported into the three-dimensional model software to provide a data source for the subsequent assembly constraint steps.

[0077] In one possible embodiment, the front subframe 31, steering tie rod 32, left lower control arm rear mount 33, left lower control arm front mount 34, and front suspension left lower control arm 35 of the third layer of the structure tree are assembled sequentially to obtain the front suspension sub-assembly 30 of the second layer of the structure tree, including:

[0078] S3, the steering tie rod 32 is assembled with the front subframe 31 via a stepped assembly, and the front suspension sub-assembly is obtained based on the six degrees of freedom of the vehicle coordinate system. The constraint points for these degrees of freedom are shown in the appendix. Figure 4 Point 1 is the main positioning hole for the steering tie rod 32 and the front subframe 31. The steering tie rod 32 is assembled with the main positioning hole of the front subframe 31 to control the XYZ directions. Point 2 is the auxiliary positioning hole for the steering tie rod 32 and the front subframe 31. The steering tie rod 32 is assembled with the auxiliary positioning hole of the front subframe 31 to control the XZ directions. Point 3 is the tightening point for the steering tie rod 32 and the front subframe 31. The steering tie rod 32 is assembled with the tightening point of the front subframe 31 to control the Z direction.

[0079] S4, based on the front suspension sub-assembly, such as Figure 5 As shown, the lower left control arm rear mounting bracket 33 and the front subframe 31 are locked together via their overlapping surfaces, constraining six degrees of freedom, thus obtaining the second front suspension sub-assembly: Figure 5 In the middle, the degree of freedom constraint points are as follows: the first datum is Figure 5 The overlapping surfaces of the lower left control arm and the lower left control arm rear mounting base 33 are marked by "point 1" and "point 2". The second reference is the Y direction of the mounting holes of "point 1" and "point 2". The six degrees of freedom between the lower left control arm rear mounting base 33 and the front subframe 31 are achieved through the assembly of "point 1" and "point 2".

[0080] S5, based on the second sub-assembly of the front suspension, the front mounting seat 34 of the lower left control arm and the front subframe 31 are locked together by the "feature assembly" of the overlapping surface to constrain 6 degrees of freedom, thus obtaining the third sub-assembly of the front suspension, whose assembly method is the same as that of the rear mounting seat of the lower control arm.

[0081] The S6, based on the three separate front suspension assemblies, such as Figure 6As shown, one end of the lower left control arm 35 of the front suspension has a circular shaft connected to the circular hole of the rear mounting bracket 33 of the lower left control arm, and the other end of the lower left control arm 35 has a circular hole connected to the front mounting bracket 34 of the lower left control arm. Through a "two-point assembly" method, five degrees of freedom are constrained together. These five degrees of freedom refer to displacement in the X, Y, and Z directions, as well as rotation about the Y and Z axes, resulting in the front suspension sub-assembly 30 in the second layer of the structure tree. In this step, the degree-of-freedom constraint points are shown below. Figure 6 As shown: "Point 1" refers to the connection between the circular shaft at one end of the lower left control arm 35 of the front suspension and the circular hole of the rear mounting seat 33 of the lower left control arm, and "Point 2" refers to the connection between the circular hole at the other end of the lower left control arm 35 of the front suspension and the front mounting seat of the lower control arm, thereby realizing the assembly constraints of 5 degrees of freedom.

[0082] In one possible embodiment, assembling the wheel hub bearing assembly 24, front brake disc 25, front suspension lower control arm ball joint 22, and steering knuckle 23 in the second layer of the structure tree to obtain a steering knuckle assembly includes:

[0083] S7-1, the wheel hub bearing assembly 24 of the second layer of the structure tree is assembled onto the front brake disc 25 through "step assembly" and constrained based on the 6 degrees of freedom of the whole vehicle coordinate system to obtain the front brake disc assembly;

[0084] S7-2, the lower control arm ball joint 22 of the front suspension is assembled onto the steering knuckle 23 through "step assembly" to constrain 6 degrees of freedom based on the vehicle coordinate system, thus obtaining the steering knuckle assembly 1;

[0085] S8, the steering knuckle assembly completed in step S7-2 is assembled onto the front brake disc assembly completed in step S7-1 using an automatic bending command (Auto Bend), constraining 6 degrees of freedom to obtain the steering knuckle assembly. The degree of freedom constraints in this step are described in [link to step S8]. Figure 7 Point 1 is the positioning hole of the steering knuckle assembly and the positioning hole of the brake disc assembly, which are bolted together to control the XYZ directions. Point 2 is the positioning hole of the steering knuckle assembly and the positioning hole of the brake disc assembly, which are bolted together to control the XY directions. Points 3 and 4 are the mounting holes of the steering knuckle assembly and the mounting holes of the brake disc assembly, which are bolted together to control the Y direction, thus achieving constraints on 6 degrees of freedom.

[0086] In one possible embodiment, the assembly of the upper top seat 26, body-in-white 21, front subframe assembly fixture 29, and front suspension sub-assembly 30 in the second layer of the structure tree to obtain a front suspension assembly of the vehicle body includes:

[0087] S9, the front subframe assembly fixture 29 of the second layer of the structure tree is assembled onto the body-in-white 21 through "two-point assembly", and the front subframe 31 of the front suspension sub-assembly 30 is assembled onto the front suspension assembly 2 of the body in a "stepped assembly" manner through the front subframe assembly fixture 29, constraining 6 degrees of freedom.

[0088] It is worth noting that the body-in-white 21 mainly controls the XY-direction deflection of the front subframe 31. The front subframe 31 is mounted to the front suspension assembly 2 of the body via a "stepped assembly," controlling 6 degrees of freedom. The degree of freedom constraints are detailed in [link to documentation]. Figure 8 As shown.

[0089] Figure 8 In the process, there are two assembly points: "Point 1" is the main positioning hole of the tooling, which is assembled onto the body-in-white 21, and "Point 2" is the auxiliary positioning hole of the tooling, which is assembled onto the body-in-white 21.

[0090] Stepped assembly: "Point 3" is the main positioning hole of the front subframe 31 connected to the main positioning pin on the tooling, controlling the XY direction; "Point 4" is the auxiliary positioning hole of the front subframe 31 connected to the positioning pin on the tooling, controlling the X direction; "Point 5" to "Point 8" are the Z-direction tightening points between the subframe and the body, controlling the Z direction. During assembly, "Point 7" and "Point 8" were given the centering assembly command.

[0091] In step S10, the upper mounting bracket 26 is assembled onto the body-in-white 21 using a three-point assembly, constraining 6 degrees of freedom to obtain the front suspension assembly. The degree-of-freedom constraints in step S10 are detailed below. Figure 9 As shown: "Point 1", "Point 2" and "Point 3" are the three bolts of the upper top mount 26 and the three holes on the vehicle body, which ensure that the upper top mount 26 is pressed against the vehicle body in the Z direction, thus achieving the constraint of 6 degrees of freedom.

[0092] In one possible embodiment, assembling the front suspension assembly and the front shock absorber strut 27 and double wishbone 28 of the second layer of the structure tree includes:

[0093] S11, the six degrees of freedom of the lower left control arm 35 of the front suspension are constrained by rotational assembly. In this step, the lower left control arm 35 of the front suspension is assembled to its theoretical position by rotational assembly. In step S6, the lower left control arm 35 of the front suspension was assembled at two points. Here, rotational assembly is performed again to constrain the six degrees of freedom of the lower left control arm 35 of the front suspension. The degree of freedom constraints in step S11 are described in [link to step S11]. Figure 10 The straight line formed by "point 1" and "point 2" is the axis of rotation. The distance between "point 3" and "point 4" of the left lower control arm 35 of the front suspension is the theoretical distance (this has been processed. The reason why the distance between "point 3" and "point 4" can be determined is because the next step (step S12) assembly can determine this distance).

[0094] S12, the front shock absorber strut 27 of the second layer of the structure tree is assembled to the upper top mount 26 of the front suspension assembly and the lower left control arm 35 of the front suspension using a two-point assembly method; the degree of freedom constraints in this step are as follows. Figure 11 Point 1 is the connection point between the front shock absorber strut 27 and the lower control arm of the front suspension, and Point 2 is the connection point between the front shock absorber strut 27 and the hole of the upper top seat 26 (this step and step S11 can be performed simultaneously).

[0095] S13, the double wishbone 28 is assembled to the body-in-white 21 of the front suspension assembly using a two-point assembly method. The double wishbone 28 is then assembled to its theoretical angular position via rotational assembly. The degree-of-freedom constraints in this step are detailed in [link to relevant documentation]. Figure 12 .

[0096] Figure 12 In the middle, two-point assembly: "Point 1" and "Point 2" are the two holes of the double wishbone 28 and the two holes of the body respectively tightened with bolts;

[0097] Rotational assembly: The double fork arm 28 rotates through the rotation axis formed by "point 1" and "point 2" to rotate "point 3" to the theoretical angular position. (This process is performed so that the theoretical distance can be determined because the next assembly step (step S14) can determine this distance).

[0098] In one possible embodiment, assembling the steering knuckle assembly with the front suspension assembly includes:

[0099] S14, the steering knuckle assembly is assembled to the double wishbone 28 and the lower left control arm 35 of the front suspension assembly of the vehicle body through two-point assembly.

[0100] The steering knuckle assembly rotates along its assembly point with the double wishbone 28 and the lower left control arm 35 of the front suspension until the end of the steering tie rod 32 is assembled onto the corresponding pre-reserved assembly point on the steering knuckle assembly.

[0101] In step S14, the degree of freedom constraints are as follows: Figure 13 .

[0102] like Figure 13 As shown, the two-point assembly is as follows: "Point 1" and "Point 2" are the two holes of the steering knuckle assembly and the two holes of the double wishbone 28 and the lower left control arm, respectively, which are tightened with bolts.

[0103] Rotational assembly: The steering knuckle assembly rotates through the rotation axis formed by "point 1" and "point 2", so that "point 3" rotates to the corresponding assembly point of the steering tie rod 32.

[0104] By following the steps above, the assembly of the parts related to the positioning parameters of the double wishbone front suspension and the constraint of its degrees of freedom can be completed.

[0105] Figure 14 This is a structural diagram of the assembly constraint system of a three-dimensional model of the positioning parameters of a double wishbone front suspension provided in an embodiment of the present invention, as shown below. Figure 14 As shown, an assembly constraint system for a three-dimensional model of a double wishbone front suspension positioning parameters includes a structure tree construction module, a front suspension sub-assembly assembly module, a steering knuckle assembly assembly module, a front suspension sub-assembly assembly module, a front suspension assembly module, and a model assembly module, wherein:

[0106] The structure tree construction module uses the geometric model of 3D simulation software to layer structural components and form a structure tree.

[0107] The front suspension sub-assembly assembly module assembles the front subframe 31, steering tie rod 32, left lower control arm rear mount 33, left lower control arm front mount 34 and front suspension left lower control arm 35 in sequence from the third layer of the structure tree to obtain the front suspension sub-assembly assembly 30 in the second layer of the structure tree.

[0108] The steering knuckle assembly module assembles the wheel hub bearing assembly 24, front brake disc 25, and front suspension lower control arm ball joint seat 22 from the second layer of the structure tree with the steering knuckle 23 to obtain the steering knuckle assembly;

[0109] The front suspension assembly module assembles the upper top mount 26, body-in-white 21, front subframe assembly tooling 29, and front suspension sub-assembly 30 in the second layer of the structure tree to obtain the front suspension assembly.

[0110] The front suspension assembly module assembles the front suspension assembly and the front shock absorber strut 27 and double wishbone 28 of the second layer of the structure tree to obtain the front suspension assembly.

[0111] The model assembly module assembles the steering knuckle assembly with the front suspension assembly of the vehicle body to obtain the front suspension positioning parameter simulation model 1.

[0112] It is understood that the assembly constraint system for a three-dimensional model of a double wishbone front suspension positioning parameters provided by the present invention corresponds to the assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters provided in the foregoing embodiments. The relevant technical features of the assembly constraint system for a three-dimensional model of a double wishbone front suspension positioning parameters can be referred to the relevant technical features of the assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters, and will not be repeated here.

[0113] Please see Figure 15 , Figure 15 This is a schematic diagram illustrating an embodiment of the electronic device provided in this invention. For example... Figure 15As shown, an embodiment of the present invention provides an electronic device, including a memory 1510, a processor 1520, and a computer program 1511 stored in the memory 1510 and executable on the processor 1520. When the processor 1520 executes the computer program 1511, it performs the following steps:

[0114] The geometric model based on 3D simulation software is used to layer the structural components to form a structure tree;

[0115] The front subframe 31, steering tie rod 32, left lower control arm rear mount 33, left lower control arm front mount 34 and front suspension left lower control arm 35 of the third layer of the structure tree are assembled sequentially to obtain the front suspension sub-assembly 30 of the second layer of the structure tree.

[0116] The wheel hub bearing assembly 24, front brake disc 25, and front suspension lower control arm ball joint seat 22 in the second layer of the structure tree are assembled with the steering knuckle 23 to obtain the steering knuckle assembly;

[0117] The upper top seat 26, body-in-white 21, front subframe assembly tool 29 and front suspension sub-assembly 30 of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0118] The front suspension assembly of the vehicle body and the front shock absorber strut 27 and double wishbone 28 of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0119] The steering knuckle assembly is assembled with the front suspension assembly of the vehicle body to obtain the simulation model 1 of the front suspension positioning parameters.

[0120] Please see Figure 16 , Figure 16 This is a schematic diagram illustrating an embodiment of a computer-readable storage medium provided by the present invention. (See diagram below.) Figure 16 As shown, this embodiment provides a computer-readable storage medium 1600, on which a computer program 1611 is stored. When the computer program 1611 is executed by a processor, it performs the following steps:

[0121] The geometric model based on 3D simulation software is used to layer the structural components to form a structure tree;

[0122] The front subframe 31, steering tie rod 32, left lower control arm rear mount 33, left lower control arm front mount 34 and front suspension left lower control arm 35 of the third layer of the structure tree are assembled sequentially to obtain the front suspension sub-assembly 30 of the second layer of the structure tree.

[0123] The wheel hub bearing assembly 24, front brake disc 25, and front suspension lower control arm ball joint seat 22 in the second layer of the structure tree are assembled with the steering knuckle 23 to obtain the steering knuckle assembly;

[0124] The upper top seat 26, body-in-white 21, front subframe assembly tool 29 and front suspension sub-assembly 30 of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0125] The front suspension assembly of the vehicle body and the front shock absorber strut 27 and double wishbone 28 of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body.

[0126] The steering knuckle assembly is assembled with the front suspension assembly of the vehicle body to obtain the simulation model 1 of the front suspension positioning parameters.

[0127] This invention provides an assembly constraint method, system, and storage medium for a three-dimensional model of a double wishbone front suspension positioning parameters. First, all structural components required for the model are layered in a structure tree format. The first layer is the overall model. The second layer includes: a front suspension sub-assembly 30, a wheel bearing assembly 24, a front brake disc 25, a front suspension lower control arm ball joint 22, a steering knuckle 23, an upper top mount 26, a body-in-white 21, a front subframe assembly fixture 29, a front shock absorber strut 27, and a double wishbone 28. It is worth noting that the front subframe assembly fixture 29 is a virtual dataset used to simulate the positioning of actual fixtures. The third layer includes: a front subframe 31, a steering tie rod 32, a rear mounting seat for the lower left control arm 33, a front mounting seat for the lower left control arm 34, and a lower left control arm for the front suspension 35. The third layer structure can be assembled to form the front suspension sub-assembly 30 of the second layer. Then, all structural components are assembled hierarchically in the 3D simulation model. The degrees of freedom of the steering knuckle assembly and the double wishbone 28 assembly are constrained using a combination of "two-point assembly" and "rotational assembly" constraints, finally yielding the front suspension positioning parameter simulation model 1. The method in this embodiment better matches the actual assembly constraint scheme in the production process, reduces the 3D dimensional deviation of the double wishbone front suspension positioning parameters, improves the conformity between the simulation model assembly constraint method and the actual process, and enhances the accuracy of the simulation analysis results, thereby ensuring the production qualification rate.

[0128] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0129] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0130] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0131] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0132] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0133] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0134] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An assembly constraint method for a three-dimensional model of positioning parameters of a double wishbone front suspension, characterized in that, include: The geometric model based on 3D simulation software is used to layer the structural components to form a structure tree; The front subframe (31), steering tie rod (32), lower left control arm rear mount (33), lower left control arm front mount (34), and lower front suspension control arm (35) of the third layer of the structure tree are assembled in sequence to obtain the front suspension sub-assembly (30) of the second layer of the structure tree. The wheel hub bearing assembly (24) of the second layer of the structure tree is assembled onto the front brake disc (25) and constrained with 6 degrees of freedom based on the vehicle coordinate system to obtain the front brake disc assembly; the lower control arm ball joint (22) of the front suspension is assembled onto the steering knuckle (23) and constrained with 6 degrees of freedom based on the vehicle coordinate system to obtain the first steering knuckle assembly; the first steering knuckle assembly is assembled onto the front brake disc assembly through an automatic bending command and constrained with 6 degrees of freedom to obtain the steering knuckle assembly; The upper top seat (26), body-in-white (21), front subframe assembly tool (29), and front suspension sub-assembly assembly (30) of the second layer of the structure tree are assembled to obtain the front suspension assembly of the vehicle body; The six degrees of freedom of the lower left control arm (35) of the front suspension are constrained by rotational assembly; the front shock absorber strut (27) of the second layer of the structure tree is assembled to the upper top seat (26) of the front suspension assembly and the lower left control arm (35) of the front suspension by two-point assembly; the double wishbone (28) is assembled to the body-in-white (21) of the front suspension assembly by two-point assembly, and the double wishbone (28) is assembled to the theoretical angle by rotational assembly to obtain the front suspension assembly. The steering knuckle assembly is assembled with the front suspension assembly of the vehicle body to obtain a simulation model of the front suspension positioning parameters (1).

2. The assembly constraint method for a three-dimensional model of positioning parameters of a double wishbone front suspension according to claim 1, characterized in that, The geometric model based on the 3D simulation software layers the structural components to form a structure tree, including: Based on the geometric model of the three-dimensional simulation software, all the simulation structural components required for the three-dimensional model of the front suspension positioning parameters are divided into three layers. The first layer is the simulation model of the front suspension positioning parameters (1). The first layer contains all the structural components of the second layer, and the second layer contains all the structural components of the third layer.

3. The assembly constraint method for a three-dimensional model of positioning parameters of a double wishbone front suspension according to claim 1, characterized in that, The front subframe (31), steering tie rod (32), left lower control arm rear mount (33), left lower control arm front mount (34), and front suspension left lower control arm (35) of the third layer of the structure tree are assembled sequentially to obtain the front suspension sub-assembly (30) of the second layer of the structure tree, including: The steering tie rod (32) is assembled with the front subframe (31) through a stepped assembly. Based on the six degrees of freedom of the vehicle coordinate system, the front suspension sub-assembly is obtained. Among them, the steering tie rod (32) is assembled with the main positioning hole of the front subframe (31) to control the XYZ direction; the steering tie rod (32) is assembled with the auxiliary positioning hole of the front subframe (31) to control the XZ direction; and the steering tie rod (32) is assembled with the tightening point of the front subframe (31) to control the Z direction. Based on the first front suspension sub-assembly, the rear mounting bracket (33) of the lower left control arm and the front subframe (31) are fitted together by locking the lap surfaces to constrain 6 degrees of freedom, resulting in the second front suspension sub-assembly: Based on the second sub-assembly of the front suspension, the front mounting bracket (34) of the lower left control arm and the front subframe (31) are fitted together by locking the lap surfaces to constrain 6 degrees of freedom, thus obtaining the third sub-assembly of the front suspension: Based on the front suspension sub-assembly three, the circular shaft at one end of the front suspension lower left control arm (35) is connected to the circular hole of the rear mounting seat (33) of the lower left control arm, and the circular hole at the other end of the front suspension lower left control arm (35) is connected to the front mounting seat (34) of the lower left control arm, thus constraining 5 degrees of freedom and obtaining the front suspension sub-assembly (30) of the second layer of the structure tree.

4. The assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters according to claim 1, characterized in that, The assembly of the upper top seat (26), body-in-white (21), front subframe assembly fixture (29), and front suspension sub-assembly assembly (30) in the second layer of the structure tree yields the front suspension assembly of the vehicle body; including: The front subframe assembly tool (29) of the second layer of the structure tree is assembled onto the body-in-white (21), and the front subframe (31) in the front suspension sub-assembly (30) is assembled onto the second front suspension assembly of the body through the front subframe assembly tool (29), constraining 6 degrees of freedom; The upper top mount (26) is assembled onto the body-in-white (21), and six degrees of freedom are constrained to obtain the front suspension assembly of the body.

5. The assembly constraint method for a three-dimensional model of positioning parameters of a double wishbone front suspension according to claim 1, characterized in that, The assembly of the steering knuckle assembly with the front suspension assembly of the vehicle body includes: The steering knuckle assembly is assembled at two points onto the double wishbone (28) and the lower left control arm (35) of the front suspension assembly of the vehicle body. The steering knuckle assembly rotates along its assembly point with the double wishbone (28) and the lower left control arm (35) of the front suspension until the end of the steering tie rod (32) is assembled onto the corresponding pre-reserved assembly point on the steering knuckle assembly.

6. An assembly constraint system for a three-dimensional model of positioning parameters of a double wishbone front suspension, characterized in that, include: The structure tree construction module uses the geometric model of 3D simulation software to layer structural components and form a structure tree. The front suspension sub-assembly assembly module assembles the front subframe (31), steering tie rod (32), left lower control arm rear mount (33), left lower control arm front mount (34) and front suspension left lower control arm (35) in sequence from the third layer of the structure tree to obtain the front suspension sub-assembly assembly (30) from the second layer of the structure tree. The steering knuckle assembly module assembles the wheel hub bearing assembly (24) of the second layer of the structure tree onto the front brake disc (25) and constrains it with 6 degrees of freedom based on the vehicle coordinate system to obtain the front brake disc assembly; the lower control arm ball joint (22) of the front suspension is assembled onto the steering knuckle (23) and constrained with 6 degrees of freedom based on the vehicle coordinate system to obtain the first steering knuckle assembly; the first steering knuckle assembly is assembled onto the front brake disc assembly through an automatic bending command and constrained with 6 degrees of freedom to obtain the steering knuckle assembly; The front suspension assembly module assembles the upper top mount (26), body-in-white (21), front subframe assembly tooling (29), and front suspension sub-assembly assembly (30) of the second layer of the structure tree to obtain the front suspension assembly. The front suspension assembly module constrains the six degrees of freedom of the lower left control arm (35) of the front suspension by rotational assembly; the front shock absorber strut (27) of the second layer of the structure tree is assembled to the upper top seat (26) of the front suspension assembly and the lower left control arm (35) of the front suspension by two-point assembly; the double wishbone (28) is assembled to the body-in-white (21) of the front suspension assembly by two-point assembly, and the double wishbone (28) is assembled to the theoretical angle by rotational assembly to obtain the front suspension assembly. The model assembly module assembles the steering knuckle assembly with the front suspension assembly of the vehicle body to obtain a simulation model of the front suspension positioning parameters (1).

7. An electronic device, characterized in that, The system includes a memory and a processor, wherein the processor is used to execute computer management programs stored in the memory to implement the assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, It stores a computer management program, which, when executed by a processor, implements the steps of the assembly constraint method for a three-dimensional model of a double wishbone front suspension positioning parameters as described in any one of claims 1-5.

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