CN112380620A - Power assembly positioning method based on CATIA hard spot parameter, computer and storage medium - Google Patents
Power assembly positioning method based on CATIA hard spot parameter, computer and storage medium Download PDFInfo
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Abstract
The invention belongs to the technical field of platform layout design and discloses a power assembly positioning method based on CATIA (computer-graphics aided three-dimensional interactive application) hard point parameters, a computer and a storage medium, wherein the method comprises the steps of establishing a power assembly hard point parameter template, a driving shaft checking template and/or a transmission shaft checking template; inputting a preset power assembly hard point parameterization file into a power assembly hard point parameter template to check the power assembly, and/or inputting a preset drive shaft parameterization file into a drive shaft checking template to check the drive shaft, and/or inputting a preset transmission shaft parameterization file into the transmission shaft checking template to check the transmission shaft; and adjusting parameters of the power assembly hard point parametric file, the driving shaft parametric file and/or the transmission shaft parametric file according to the checking result. The invention can realize the positioning of the power assemblies of different vehicle types, improve the positioning efficiency of the power assemblies and the arrangement accuracy of the power assemblies and reduce the working difficulty of the positioning of the power assemblies.
Description
Technical Field
The invention relates to the technical field of platform layout design, in particular to a power assembly positioning method based on CATIA hard spot parameters, a computer and a storage medium.
Background
The positioning of the power assembly is an important step in the layout design of the whole vehicle, directly influences the design of the early-stage performance, the size and the like of the whole vehicle, and is the basis for the subsequent detailed layout of pipelines and the like. At the beginning of vehicle design, powertrain selection is required: the engine has different types and different discharge capacities of natural air suction, turbocharging and mechanical supercharging; the gearbox (the longitudinal vehicle type and the main speed reducer) has different types such as AT/CVT/DCT/MT/AMT corresponding to different engines and different supplier sizes. The combination of the engine and the gearbox is more, the positioning of the power assembly needs to be adjusted repeatedly within limited time to judge the arrangement feasibility of the power assembly and the reasonability of the size design of the vehicle body, the time is tight, the task is heavy, and the operation is complex.
The existing positioning of a power assembly is usually designed through three-dimensional software (such as CATIA), and the specific steps are as follows: firstly, an engine and a gearbox power assembly are paired. And adjusting the position of the power assembly to check the clearance of the power assembly. And thirdly, after the clearance check of the power assembly is met, checking the angle and the clearance of the driving shaft, wherein the checking of the angle of the driving shaft needs to be converted into EXCEL table operation, and the spatial check of the driving shaft needs to generate the envelope of the driving shaft independently. If the space and the angle of the driving shaft do not meet the requirements, the power assembly needs to be positioned again (and the step II is returned), and the step III is repeated until the requirements are met. And fourthly, after the clearance check of the power assembly, the space check of the driving shaft and the angle of the driving shaft meet the requirements, the positioning is finished.
From the above positioning method, it is still necessary to repeatedly adjust the positioning of the powertrain, which results in complicated operation, and the EXCEL table is also applied in the intermediate process, thereby reducing the efficiency of positioning the powertrain.
Disclosure of Invention
The invention aims to provide a power assembly positioning method based on CATIA hard spot parameters, a computer and a storage medium, which are simple to operate and improve the efficiency of power assembly positioning.
In order to achieve the purpose, the invention adopts the following technical scheme: a power assembly positioning method based on CATIA hard spot parameters,
establishing a power assembly hard point parameter template according to an engine model and a gearbox model;
establishing a driving shaft checking template according to the driving shaft model, and/or establishing a transmission shaft checking template according to the transmission shaft model;
associating the power assembly hard point parameter template with power assembly data, wherein the power assembly data comprises engine data and gearbox data, so as to realize linkage of the power assembly hard point parameter template with the driving shaft checking template or realize linkage of the power assembly hard point parameter template with the driving shaft checking template and the driving shaft checking template;
inputting a preset power assembly hard point parameterization file into the power assembly hard point parameter template to check the power assembly, and/or inputting a preset driving shaft parameterization file into the driving shaft checking template to check the driving shaft, and/or inputting a preset transmission shaft parameterization file into the transmission shaft checking template to check the transmission shaft;
and adjusting parameters of the power assembly hard point parametric file, the driving shaft parametric file and/or the transmission shaft parametric file according to the checking result, and finally determining the parameters of the power assembly hard point parametric file, the driving shaft parametric file and/or the transmission shaft parametric file meeting the design requirements.
Preferably, the method further comprises the following steps:
after the parameters of the power assembly hard point parameterization file, the driving shaft parameterization file and/or the transmission shaft parameterization file are adjusted, if the design requirements cannot be met, the power assembly data are modified, and the power assembly, the driving shaft and/or the transmission shaft are checked again to determine the parameters of the power assembly hard point parameterization file, the driving shaft parameterization file and/or the transmission shaft parameterization file meeting the design requirements.
Preferably, the method further comprises the following steps:
when the parameters of the power assembly hard point parameterized file, the driving shaft parameterized file and/or the transmission shaft parameterized file cannot meet the design requirements during rechecking of the power assembly, the driving shaft and/or the transmission shaft, adjusting the parameters of a vehicle body matched with the power assembly, and rechecking the power assembly, the driving shaft and/or the transmission shaft to determine the parameters of the power assembly hard point parameterized file, the driving shaft parameterized file and/or the transmission shaft parameterized file meeting the design requirements.
Preferably, when the powertrain is a front-transverse four-wheel drive vehicle type powertrain or a longitudinal four-wheel drive vehicle type powertrain, the drive shaft checking template is associated with rear shaft related data, and the rear shaft related data comprises coupler data, rear main reducer data and drive shaft inner section data.
Preferably, the hard point parameters of the power assembly hard point parameter template comprise intersection point coordinates of the rear end face of the engine cylinder body and the central line of the crankshaft, a front and rear inclination angle of the engine, a left and right inclination angle of the engine, a height difference between the central line of the crankshaft and the output shaft of the gearbox, and a distance between the output shaft of the gearbox and the central line of the crankshaft of the engine, wherein the intersection point coordinates, the front and rear inclination angle of the engine, the left and right inclination angle of the engine and the height difference between the central line of the crankshaft and the.
Preferably, the drive shaft checking template includes a drive shaft input parameter and a drive shaft output parameter, wherein:
the input parameters of the driving shaft comprise coordinates of an outer joint center of the driving shaft, coordinates of an inner joint center of the driving shaft, length of the driving shaft and diameter of the driving shaft;
the driving shaft output parameters comprise a driving shaft envelope, a driving shaft inner pitch angle and slip checking curve and a driving shaft outer pitch angle checking curve.
Preferably, the transmission shaft checking template comprises transmission shaft input parameters and transmission shaft output parameters, wherein:
the transmission shaft input parameters comprise a transmission shaft plane distance, an included angle between a PTU output shaft and a first shaft, an included angle between a coupler input shaft and a third shaft, a first shaft length, a third shaft length and a transmission shaft radius, wherein the transmission shaft plane distance is the distance between a horizontal plane where the axis of the transmission shaft is located and a vertical plane where an initial coordinate system is located, the transmission shaft comprises the first shaft, the second shaft and the third shaft which are sequentially connected, the PTU output shaft is connected to the first shaft, and the coupler input shaft is connected to the third shaft;
or the transmission shaft input parameters comprise a transmission shaft plane distance, an included angle between a longitudinal transmission output shaft and a first shaft, an included angle between a rear main reducer input shaft and a third shaft, a first shaft length, a third shaft length and a transmission shaft radius, wherein the transmission shaft plane distance is the distance between a horizontal plane where the transmission shaft axis is located and a vertical plane where an initial coordinate system is located, the transmission shaft comprises the first shaft, the second shaft and the third shaft which are sequentially connected, the longitudinal transmission output shaft is connected to the first shaft, and the rear main reducer input shaft is connected to the third shaft;
the transmission shaft output parameters comprise transmission shaft envelopes and transmission shaft angle checking curves.
The present invention also provides a computer comprising: a processor and a memory;
the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to realize the power assembly positioning method based on the CATIA hard point parameter.
The invention also provides a storage medium on which a computer program is stored, which computer program, when executed by a processor, implements the method for positioning a powertrain based on the CATIA hard spot parameters as described above.
The invention has the beneficial effects that: according to the power assembly positioning method, the positioning of the power assemblies of different vehicle types can be realized, the efficiency of positioning the power assemblies and the accuracy of power assembly arrangement are improved, and the working difficulty of power assembly positioning is reduced.
Drawings
FIG. 1 is a flow chart of a powertrain positioning method based on CATIA hard spot parameters provided by the present invention;
fig. 2 is a diagram of the CATIA interface during verification of the drive shaft according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The invention provides a power assembly positioning method based on CATIA hard spot parameters, which can be operated through three-dimensional software CATIA to realize positioning simulation of power assemblies of different vehicle types in software and further obtain parameters meeting requirements.
As shown in fig. 1, the method for positioning a powertrain based on the CATIA hard spot parameters of the present embodiment includes the following steps:
and S1, establishing a powertrain hard point parameter template according to the engine model and the transmission model.
The method comprises the steps of establishing an engine model and a transmission model in three-dimensional software CATIA, and establishing a power assembly hard point parameter template through the engine model and the transmission model, wherein the hard point parameters of the power assembly hard point parameter template comprise intersection point coordinates of the rear end surface of an engine cylinder body and the central line of a crankshaft, a front-back inclination angle of the engine, a left-right inclination angle of the engine, the height difference between the central line of the crankshaft and the output shaft of a transmission, and the distance between the output shaft of the transmission and the central line of the engine crankshaft, the intersection point coordinates, the front-back inclination angle of the engine, the left-right inclination angle of the engine and the height difference between the central line of the crankshaft and the output shaft of the transmission are adjustable parameters, namely, the parameters can be adjusted according to design requirements, the initial parameters can be adjusted according to different vehicle types, and the, and finally obtaining the hard point parameters of the power assembly hard point parameter template meeting the requirements.
And S2, establishing a drive shaft checking template according to the drive shaft model, and/or establishing a transmission shaft checking template according to the transmission shaft model.
Namely, the three-dimensional software CATIA establishes a driving shaft model, and establishes a driving shaft checking template through the driving shaft model so as to carry out subsequent driving shaft checking operation.
In this step, the above-mentioned drive shaft check template includes drive shaft input parameter and drive shaft output parameter, wherein:
the drive shaft input parameter is a parameter that is manually input, and the position, angle, and the like of the drive shaft can be changed by inputting the parameter through the drive shaft. In this embodiment, the input parameters of the driving shaft include coordinates of an outer joint center of the driving shaft, coordinates of an inner joint center of the driving shaft (which can be linked with a hard point template of the power assembly), length of the driving shaft, and diameter of the driving shaft.
The output parameters of the driving shaft are input parameters of the driving shaft, so that after the position, the angle and the like of the driving shaft are changed, a driving shaft envelope, a driving shaft inner pitch angle and slippage check curve and a driving shaft outer pitch angle check curve are presented in the interface of the CATIA. Spatial checking of the drive shaft can be performed based on the drive shaft envelope to determine the position of the drive shaft that meets requirements. According to the check curve of the inner pitch angle and the slip of the driving shaft and the check curve of the outer pitch angle of the driving shaft, whether the formed inner pitch angle, the slip and the outer pitch angle of the driving shaft meet the requirements or not after the current input parameters of the driving shaft are input can be determined.
The establishing of the transmission shaft checking template according to the transmission shaft model specifically means that the transmission shaft model is established in the three-dimensional software CATIA, and the transmission shaft checking template is established through the transmission shaft model so as to perform subsequent transmission shaft checking operation. It should be noted that the transmission shaft checking template is mainly applied to
In this step, the transmission shaft checking template includes a transmission shaft input parameter and a transmission shaft output parameter, wherein:
when the power assembly is transversely arranged, the input parameters of the transmission shaft comprise the plane distance of the transmission shaft, the included angle between a PTU output shaft (namely a transfer case output shaft) and a first shaft, the included angle between a coupler input shaft and a third shaft, the length of the first shaft, the length of a third shaft and the radius of the transmission shaft, the plane distance of the transmission shaft is the distance between the vertical plane where the axis of the transmission shaft is located and the vertical plane where an initial coordinate system is located (namely the Y plane of the initial coordinate system), the transmission shaft comprises the first shaft, the second shaft and the third shaft which are sequentially connected, the PTU output shaft is connected with the first shaft, and the coupler input. Through the transmission shaft input parameters, the changes of the position, the angle and the like of the transmission shaft model can be realized.
When the power assembly is vertically arranged, the input parameters of the transmission shaft comprise the plane distance of the transmission shaft, the included angle between the output shaft of the vertically arranged transmission and the first shaft, the included angle between the input shaft of the rear main speed reducer and the third shaft, the length of the first shaft, the length of the third shaft and the radius of the transmission shaft, the plane distance of the transmission shaft is the distance between the vertical plane where the axis of the transmission shaft is located and the vertical plane where the initial coordinate system is located (namely the Y plane of the initial coordinate system), the transmission shaft comprises the first shaft, the second shaft and the third shaft which are sequentially connected, the output shaft of the vertically arranged transmission is connected to.
The output parameters of the transmission shaft comprise transmission shaft envelopes and transmission shaft angle checking curves, namely after the input parameters of the transmission shaft are input, the transmission shaft envelopes and the transmission shaft angle checking curves can be presented in a CATIA interface, and then the spatial checking of the transmission shaft can be carried out according to the transmission shaft envelopes so as to determine the position of the transmission shaft meeting the requirements. And determining whether the angle of the transmission shaft formed by the current transmission shaft input parameters meets the requirement or not through a transmission shaft angle checking curve.
In this step, it should be noted that when the powertrain is a front-wheel-drive-type powertrain, the positioning of the powertrain can be completed only by checking the hard-spot template and the driving shaft template of the powertrain. When the power assembly is a rear-drive vehicle type power assembly or a four-drive vehicle type power assembly, a hard point template of the power assembly, a drive shaft checking template and a transmission shaft checking template are needed to complete the positioning of the power assembly.
And S3, associating the power assembly hard point parameter template with the power assembly data to realize linkage of the power assembly hard point parameter template and the driving shaft checking template or realize linkage of the power assembly hard point parameter template, the driving shaft checking template and the transmission shaft checking template.
In the step, the power assembly data comprises engine data and gearbox data, and the hard point parameter template of the power assembly is associated with the engine data and the gearbox data, so that the combination of a power assembly model and data required by an actual vehicle model in software is realized, and the subsequent checking and positioning operation is facilitated. Specifically, when the power assembly is a front-wheel-type power assembly, the power assembly hard point parameter template is associated with power assembly data, and linkage of the power assembly hard point template and the driving shaft checking template can be realized. When the power assembly is a rear-drive vehicle type power assembly or a four-drive vehicle type power assembly, the linkage of a hard spot template of the power assembly, a drive shaft checking template and a transmission shaft checking template can be realized.
And S4, inputting a preset power assembly hard point parameterization file into a power assembly hard point parameter template to check the power assembly, and/or inputting a preset drive shaft parameterization file into the drive shaft checking template to check the drive shaft, and/or inputting a preset transmission shaft parameterization file into the transmission shaft checking template to check the transmission shaft.
In this step, three kinds of checking of the power assembly, the driving shaft and the transmission shaft can be performed, for example, a preset power assembly hard point parameterization file (namely, an intersection point coordinate of the rear end face of the engine cylinder body and the central line of the crankshaft, an engine front and rear inclination angle, an engine left and right inclination angle, a height difference between the central line of the crankshaft and the output shaft of the gearbox, and a distance between the output shaft of the gearbox and the central line of the engine, which are given at the beginning of design) is input into a power assembly hard point parameter template, and then, an initial power assembly position and a corresponding parameter value can be obtained, at this time, positioning checking of the power assembly can be performed, namely, whether the power assembly position presented in the.
Similarly, if the checking of the driving shaft is performed, a preset driving shaft parameterization file (namely, the driving shaft outer pitch center coordinates, the driving shaft inner pitch center coordinates, the driving shaft length and the driving shaft diameter given at the beginning of the design) is input into the driving shaft checking template, and then the checking of the driving shaft is performed, namely, whether the driving shaft meets the requirements or not is determined according to the driving shaft output parameters. As shown in fig. 2, a spatial check of the drive shaft can be performed based on the drive shaft envelope to determine whether the clearance of the drive shaft from the peripheral components is satisfactory. And determining whether the inner pitch angle and the slippage of the driving shaft meet the requirements according to a checking curve of the inner pitch angle and the slippage of the driving shaft presented by the CATIA interface, and determining whether the outer pitch angle of the driving shaft meets the requirements according to a checking curve of the outer pitch angle of the driving shaft.
If the transmission shaft is checked, inputting a preset transmission shaft parameterization file (namely, a transmission shaft plane distance given at the beginning of design, an included angle between a PTU output shaft (namely, a transfer case output shaft) and a first shaft, an included angle between a coupler input shaft and a third shaft, the length of the first shaft, the length of the third shaft and the radius of the transmission shaft) into a transmission shaft checking template, and then checking the transmission shaft. For example, the space check of the transmission shaft is carried out according to the envelope of the transmission shaft so as to determine whether the clearance between the transmission shaft and the peripheral component meets the requirement. And determining whether the angle of the transmission shaft formed by the current transmission shaft input parameters meets the requirement or not through a transmission shaft angle checking curve.
And S5, adjusting parameters of the power assembly hard point parameterized file, the driving shaft parameterized file and/or the transmission shaft parameterized file according to the checking result, and finally determining parameters of the power assembly hard point parameterized file, the driving shaft parameterized file and/or the transmission shaft parameterized file which meet the design requirements.
When positioning and checking the power assembly are carried out, if the position of the power assembly presented in the CATIA interface does not meet the requirements, the initially input preset power assembly hard point parameterization file does not meet the design requirements, at the moment, the power assembly hard point parameterization file needs to be adjusted (specifically, one or more of the intersection point coordinate of the rear end face of the engine cylinder body and the central line of the crankshaft, the front and rear inclination angles of the engine, the left and right inclination angles of the engine and the height difference between the central line of the crankshaft and the output shaft of the gearbox are adjusted), the positioning and checking of the power assembly in the step S5 are repeated until the position of the power assembly presented in the CATIA interface meets the requirements, and at the moment, the corresponding power assembly hard point parameterization file meeting the requirements can be recorded.
Similarly, when the driving shaft is checked, a driving shaft envelope, a driving shaft inner pitch angle and slip check curve and a driving shaft outer pitch angle check curve can be presented in the CATIA interface, and through the driving shaft inner pitch angle and slip check curve and the driving shaft outer pitch angle check curve, whether the currently preset driving shaft parameterized file meets the requirements can be determined, specifically, when the requirements are met, as shown in fig. 2, several working condition points (upper jump limit, upper jump left dead, upper jump right dead, load left dead, load right dead, lower jump limit, lower jump left dead and lower jump right dead) are presented in the CATIA interface, and the working condition points are within the straight line (driving shaft outer pitch angle check) and the curve (driving shaft inner pitch angle and slip check) shown in fig. 2, and if the requirements are not met, the working condition points are located outside the straight line and the curve shown in fig. 2, at the moment, readjustment is needed, a new driving shaft parameterization file is input, checking of the driving shaft is repeated until the driving shaft presented in the CATIA interface meets the requirements, and at the moment, the corresponding driving shaft parameterization file meeting the requirements can be recorded.
It can be understood that when the checking of the transmission shaft is performed, a transmission shaft envelope and a transmission shaft angle checking curve can be presented in the CATIA interface, at this time, the checking of the transmission shaft can be performed according to the transmission shaft envelope and the transmission shaft angle checking curve, when the requirements are not met, a new transmission shaft parameterization file is readjusted and input, the checking of the transmission shaft is repeated until the transmission shaft presented in the CATIA interface meets the requirements, and at this time, the corresponding transmission shaft parameterization file meeting the requirements can be recorded.
In this embodiment, it should be noted that, after the parameters of the powertrain hard point parameterization file, the drive shaft parameterization file, and/or the transmission shaft parameterization file are adjusted for multiple times in step S6, if the checking of the powertrain, the checking of the drive shaft, and/or the checking of the transmission shaft still fail to meet the requirements, it indicates that the original powertrain data has a problem, and at this time, the powertrain data needs to be modified again, and the checking of the powertrain, the drive shaft, and/or the transmission shaft needs to be performed again to determine the parameters of the powertrain hard point parameterization file, the drive shaft parameterization file, and/or the transmission shaft parameterization file that meet the design requirements.
After the data of the power assembly is modified, parameters of the power assembly hard point parameterized file, the drive shaft parameterized file and/or the transmission shaft parameterized file which meet the required design requirements still cannot be obtained, parameters of a vehicle body matched with the power assembly need to be adjusted, and the power assembly, the drive shaft and/or the transmission shaft are checked again to determine parameters of the power assembly hard point parameterized file, the drive shaft parameterized file and/or the transmission shaft parameterized file which meet the design requirements.
When the power assembly is a front transverse four-wheel drive vehicle type power assembly or a longitudinal four-wheel drive vehicle type power assembly, before checking the power assembly, the driving shaft and/or the transmission shaft, a driving shaft checking template needs to be associated with rear shaft related data, wherein the rear shaft related data comprises coupler data, rear main reducer data and driving shaft inner section data.
According to the power assembly positioning method based on the CATIA hard spot parameters, the positioning of the power assemblies of different vehicle types and the checking of the driving shaft and the transmission shaft can be realized, the power assembly positioning efficiency and the power assembly arrangement accuracy are improved, and the working difficulty of the power assembly positioning is reduced.
The present invention also provides a computer comprising: a processor and a memory;
the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to realize the power assembly positioning method based on the CATIA hard point parameter.
The invention also provides a storage medium on which a computer program is stored, which computer program, when executed by a processor, implements the method for positioning a powertrain based on the CATIA hard spot parameters as described above.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A power assembly positioning method based on CATIA hard point parameters is characterized in that,
establishing a power assembly hard point parameter template according to an engine model and a gearbox model;
establishing a driving shaft checking template according to the driving shaft model, and/or establishing a transmission shaft checking template according to the transmission shaft model;
associating the power assembly hard point parameter template with power assembly data to realize linkage of the power assembly hard point parameter template and the driving shaft checking template or realize linkage of the power assembly hard point parameter template, the driving shaft checking template and the transmission shaft checking template, wherein the power assembly data comprises engine data and gearbox data;
inputting a preset power assembly hard point parameterization file into the power assembly hard point parameter template to check the power assembly, and/or inputting a preset driving shaft parameterization file into the driving shaft checking template to check the driving shaft, and/or inputting a preset transmission shaft parameterization file into the transmission shaft checking template to check the transmission shaft;
and adjusting parameters of the power assembly hard point parametric file, the driving shaft parametric file and/or the transmission shaft parametric file according to the checking result, and finally determining the parameters of the power assembly hard point parametric file, the driving shaft parametric file and/or the transmission shaft parametric file meeting the design requirements.
2. The CATIA hard spot parameter based powertrain positioning method of claim 1, further comprising:
after the parameters of the power assembly hard point parametric file, the driving shaft parametric file and/or the transmission shaft parametric file are adjusted, if the design requirements cannot be met, the data of the power assembly are modified, and the power assembly, the driving shaft and/or the transmission shaft are checked again to determine the parameters of the power assembly hard point parametric file, the driving shaft parametric file and/or the transmission shaft parametric file meeting the design requirements.
3. The CATIA hard spot parameter based powertrain positioning method of claim 2, further comprising:
when the parameters of the power assembly hard point parameterized file, the driving shaft parameterized file and/or the transmission shaft parameterized file cannot meet the design requirements during rechecking of the power assembly, the driving shaft and/or the transmission shaft, adjusting the parameters of a vehicle body matched with the power assembly, and rechecking the power assembly, the driving shaft and/or the transmission shaft to determine the parameters of the power assembly hard point parameterized file, the driving shaft parameterized file and/or the transmission shaft parameterized file meeting the design requirements.
4. The CATIA hard spot parameter based powertrain positioning method of claim 2 or 3, wherein the powertrain, when in a front-transverse-mounted four-wheel-drive vehicle type powertrain or a longitudinal-mounted four-wheel-drive vehicle type powertrain, associates the drive shaft checking template with rear shaft related data, the rear shaft related data comprising coupler data, rear main reducer data and drive shaft inner section data.
5. The CATIA hard spot parameter-based power assembly positioning method of claim 4, wherein the hard spot parameters of the power assembly hard spot parameter template comprise intersection point coordinates of a rear end surface of an engine cylinder and a central line of a crankshaft, a front and rear inclination angle of the engine, a left and right inclination angle of the engine, a height difference between the central line of the crankshaft and an output shaft of a gearbox, and a distance between an output shaft of the gearbox and the central line of the crankshaft of the engine, and the intersection point coordinates, the front and rear inclination angles of the engine, the left and right inclination angles of the engine, and the height difference between the central line of the crankshaft and the output shaft of the gearbox.
6. The CATIA hard spot parameter based powertrain positioning method of claim 4, wherein the drive shaft verification template comprises drive shaft input parameters and drive shaft output parameters, wherein:
the input parameters of the driving shaft comprise coordinates of an outer joint center of the driving shaft, coordinates of an inner joint center of the driving shaft, length of the driving shaft and diameter of the driving shaft;
the driving shaft output parameters comprise a driving shaft envelope, a driving shaft inner pitch angle and slip checking curve and a driving shaft outer pitch angle checking curve.
7. The CATIA hard spot parameter based powertrain positioning method of any one of claims 2-4, wherein the driveshaft verification template comprises a driveshaft input parameter and a driveshaft output parameter, wherein:
the transmission shaft input parameters comprise a transmission shaft plane distance, an included angle between a PTU output shaft and a first shaft, an included angle between a coupler input shaft and a third shaft, a first shaft length, a third shaft length and a transmission shaft radius, wherein the transmission shaft plane distance is the distance between a horizontal plane where the axis of the transmission shaft is located and a vertical plane where an initial coordinate system is located, the transmission shaft comprises the first shaft, the second shaft and the third shaft which are sequentially connected, the PTU output shaft is connected to the first shaft, and the coupler input shaft is connected to the third shaft;
or the transmission shaft input parameters comprise a transmission shaft plane distance, an included angle between a longitudinal transmission output shaft and a first shaft, an included angle between a rear main reducer input shaft and a third shaft, a first shaft length, a third shaft length and a transmission shaft radius, wherein the transmission shaft plane distance is the distance between a horizontal plane where the transmission shaft axis is located and a vertical plane where an initial coordinate system is located, the transmission shaft comprises the first shaft, the second shaft and the third shaft which are sequentially connected, the longitudinal transmission output shaft is connected to the first shaft, and the rear main reducer input shaft is connected to the third shaft;
the transmission shaft output parameters comprise transmission shaft envelopes and transmission shaft angle checking curves.
8. A computer, comprising: a processor and a memory;
wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to realize the CATIA hard point parameter-based powertrain positioning method as recited in any one of claims 1 to 7.
9. A storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the CATIA hard spot parameter based powertrain positioning method as claimed in any one of claims 1-7.
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