Driving shaft product selection method and device

Abstract

The invention provides a driving shaft product selection method and device. The method comprises the steps that the whole vehicle parameters of a target vehicle are obtained; according to the whole vehicle parameters, the maximum torque transmitted to a driving shaft by a power source and the maximum ground slip torque transmitted to the driving shaft by ground slip are calculated; calculating an application torque at a forward gear and an application torque at a reverse gear according to the maximum torque and the maximum ground slip torque; according to the application torque in the forward gear and the application torque in the reverse gear, the drive shaft yield torque and the drive shaft fracture torque are calculated; determining a theoretical torque combination according to the driving shaft yield torque and the driving shaft fracture torque; and selecting a target driving shaft product from the to-be-selected driving shaft products according to the theoretical torque combination and the torque combination of the to-be-selected driving shaft products. According to the method and device, the suitable driving shaft product can be rapidly, comprehensively and accurately selected for the vehicle according to the requirements of the whole vehicle, the selection process is simple, the reliability is high, and the vehicle design efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle design technology, and in particular to a method and device for selecting a drive shaft product. Background Art

[0002] At present, in the process of selecting a vehicle drive axle assembly, the maximum torsion angle of the candidate drive axle assembly is usually calculated first; then, based on the relationship between the maximum torsion angle of the candidate drive axle assembly and the preset torsion angle, a drive axle assembly that meets the preset power response speed is selected from the candidate drive axle assembly. However, in practice, it is found that relying solely on the maximum torsion angle as a selection basis has limitations, and it is not enough to comprehensively and accurately determine the most suitable drive shaft product. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a method and device for selecting a drive shaft product, which can quickly select a suitable drive shaft product for the vehicle in a comprehensive and accurate manner according to the needs of the entire vehicle. The selection process is simple, the reliability is high, and the vehicle design efficiency is improved.

[0004] The first aspect of the present application provides a method for selecting a drive shaft product, comprising:

[0005] Obtaining vehicle parameters of a target vehicle; wherein the target vehicle is a vehicle for which a drive shaft selection is required;

[0006] According to the vehicle parameters, calculating the maximum torque transmitted from the power source to the drive shaft and the maximum ground slip torque transmitted to the drive shaft due to ground slip;

[0007] Calculating an applied torque in a forward gear and an applied torque in a reverse gear according to the maximum torque and the maximum ground slip torque;

[0008] Calculating a drive shaft yield torque and a drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear;

[0009] Determining a theoretical torque combination according to the drive shaft yield torque and the drive shaft breaking torque;

[0010] A target drive shaft product is selected from the drive shaft products to be selected based on the theoretical torque combination and the torque combination of the drive shaft products to be selected.

[0011] Furthermore, the calculating, based on the vehicle parameters, the maximum torque transmitted from the power source to the drive shaft and the maximum ground slip torque transmitted to the drive shaft due to ground slip, comprises:

[0012] According to the vehicle parameters, the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, the total efficiency of the reverse gear, the maximum load of the axle, the tire radius, the wheelbase, the full load center of mass height and the ground adhesion coefficient are calculated;

[0013] Calculate the maximum torque transmitted from the power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, and the total efficiency of the reverse gear; wherein the maximum torque includes the maximum torque transmitted from the forward gear power source to the drive shaft and the maximum torque transmitted from the reverse gear power source to the drive shaft;

[0014] The maximum ground slip torque transmitted to the drive shaft due to ground slip is calculated based on the maximum axle load, the tire radius, the wheelbase, the fully loaded center of mass height and the ground adhesion coefficient, wherein the maximum ground slip torque includes the maximum torque transmitted to the drive shaft by the forward gear power source and the maximum torque transmitted to the drive shaft by the reverse gear power source.

[0015] Further, the calculating the maximum torque transmitted from the power source to the drive shaft according to the maximum torque of the power source, the total forward gear speed ratio, the total reverse gear speed ratio, the total forward gear efficiency and the total reverse gear efficiency includes:

[0016] Calculating the maximum torque transmitted to the drive shaft by the forward gear power source according to the maximum torque of the power source, the forward gear total speed ratio and the forward gear total efficiency;

[0017] The maximum torque transmitted from the reverse gear power source to the drive shaft is calculated according to the maximum torque of the power source, the total reverse gear speed ratio and the total reverse gear efficiency.

[0018] Further, the calculating the applied torque in the forward gear and the applied torque in the reverse gear according to the maximum torque and the maximum ground slip torque includes:

[0019] Obtain the safety factor, the ground adhesion torque impact coefficient, the torque calculated on the drive shaft by the forward gear torque limit torque, and the torque calculated on the drive shaft by the reverse gear torque limit torque;

[0020] Calculate the applied torque in the forward gear according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in the forward gear, and the torque calculated on the drive shaft by the forward gear torque limit torque;

[0021] The applied torque in reverse gear is calculated according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in reverse gear, and the torque calculated on the drive shaft by the reverse gear torque limit torque.

[0022] Further, the calculation of the drive shaft yield torque and the drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear includes:

[0023] Calculating the drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear;

[0024] The yield torque of the drive shaft is calculated according to the preset universal joint yield torque safety factor and the breaking torque of the drive shaft.

[0025] Further, determining the theoretical torque combination according to the yield torque of the drive shaft and the breaking torque of the drive shaft includes:

[0026] determining a theoretical yield torque according to the drive shaft yield torque;

[0027] Determine the theoretical breaking torque of the drive shaft product according to the breaking torque of the drive shaft;

[0028] A theoretical torque combination is determined based on the theoretical yield torque and the theoretical breaking torque.

[0029] A second aspect of the present application provides a drive shaft product selection device, the drive shaft product selection device comprising:

[0030] An acquisition unit, used for acquiring vehicle parameters of a target vehicle; wherein the target vehicle is a vehicle for which a drive shaft selection is required;

[0031] A first calculation unit is used to calculate the maximum torque transmitted to the drive shaft by the power source and the maximum ground slip torque transmitted to the drive shaft due to ground slip according to the vehicle parameters;

[0032] a second calculation unit, configured to calculate an applied torque in a forward gear and an applied torque in a reverse gear according to the maximum torque and the maximum ground slip torque;

[0033] a third calculation unit, configured to calculate a drive shaft yield torque and a drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear;

[0034] a determination unit, configured to determine a theoretical torque combination according to the drive shaft yield torque and the drive shaft breaking torque;

[0035] A selection unit is used to select a target drive shaft product from the drive shaft products to be selected according to the theoretical torque combination and the torque combination of the drive shaft products to be selected.

[0036] Furthermore, the first computing unit includes:

[0037] A first calculation subunit is used to calculate the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, the total efficiency of the reverse gear, the maximum load of the axle, the tire radius, the wheelbase, the full load center of mass height and the ground adhesion coefficient according to the vehicle parameters;

[0038] a second calculation subunit, configured to calculate a maximum torque transmitted from the power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, and the total efficiency of the reverse gear; wherein the maximum torque includes the maximum torque transmitted from the forward gear power source to the drive shaft and the maximum torque transmitted from the reverse gear power source to the drive shaft;

[0039] The third calculation subunit is used to calculate the maximum ground slip torque transmitted to the drive shaft due to ground slip based on the maximum load of the axle, the tire radius, the wheelbase, the fully loaded center of mass height and the ground adhesion coefficient, wherein the maximum ground slip torque includes the maximum torque transmitted to the drive shaft by the forward gear power source and the maximum torque transmitted to the drive shaft by the reverse gear power source.

[0040] Further, the second calculation subunit is specifically used to calculate the maximum torque transmitted from the forward gear power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear and the total efficiency of the forward gear;

[0041] The second calculation subunit is further configured to calculate the maximum torque transmitted from the reverse gear power source to the drive shaft according to the maximum torque of the power source, the total reverse gear speed ratio and the total reverse gear efficiency.

[0042] Furthermore, the second computing unit includes:

[0043] An acquisition subunit is used to acquire a safety factor, a ground adhesion torque impact coefficient, a torque calculated on the drive shaft by the forward gear torque limit torque, and a torque calculated on the drive shaft by the reverse gear torque limit torque;

[0044] a fourth calculation subunit, configured to calculate the applied torque in the forward gear according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in the forward gear, and the torque calculated on the drive shaft by the forward gear torque limit torque;

[0045] The fourth calculation subunit is further used to calculate the applied torque in reverse gear based on the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in reverse gear, and the torque calculated on the drive shaft by the reverse gear torque limit torque.

[0046] Further, the third calculation unit is specifically used to calculate the driving shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear;

[0047] The third calculation unit is further specifically used to calculate the yield torque of the drive shaft according to a preset universal joint yield torque safety factor and the drive shaft breaking torque.

[0048] Further, the determination unit is specifically used to determine the theoretical yield torque according to the yield torque of the drive shaft;

[0049] The determination unit is further configured to determine a theoretical breaking torque of a drive shaft product according to the breaking torque of the drive shaft;

[0050] The determination unit is specifically further used to determine a theoretical torque combination according to the theoretical yield torque and the theoretical fracture torque.

[0051] A third aspect of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the drive shaft product selection method described in any one of the first aspects of the present application.

[0052] A fourth aspect of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the drive shaft product selection method described in any one of the first aspect of the present application is executed.

[0053] The beneficial effects of the present application are as follows: the method and device can calculate the required static torsional strength requirements of the drive shaft based on the power source transmission torque borne by the drive shaft, the reaction torque of ground slippage borne by the drive shaft, the vehicle load spectra of a large number of vehicles (such as fuel vehicles, new energy vehicles), road test results and vehicle model market performance, and further combine the theoretical torsional strength of the drive shaft product to complete the selection of the drive shaft specifications, thereby achieving a simple, fast, highly reliable and low-redundancy drive shaft product selection effect, which in turn helps to reduce the cost and weight of the drive shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 A schematic diagram of a process flow of a drive shaft product selection method provided in an embodiment of the present application;

[0056] Figure 2 A schematic flow chart of another drive shaft product selection method provided in an embodiment of the present application;

[0057] Figure 3 A schematic diagram of an example flow of a method for selecting a drive shaft product provided in an embodiment of the present application;

[0058] Figure 4 A schematic diagram of a drive shaft structure provided in an embodiment of the present application;

[0059] Figure 5 A schematic diagram of the structure of a drive shaft product selection device provided in an embodiment of the present application;

[0060] Figure 6 A schematic structural diagram of another drive shaft product selection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0062] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0063] Example 1

[0064] Please see Figure 1 , Figure 1 A schematic diagram of a process flow of a drive shaft product selection method provided in this embodiment. The drive shaft product selection method includes:

[0065] S101. Obtain vehicle parameters of a target vehicle; wherein the target vehicle is a vehicle that needs to have a drive shaft selected.

[0066] S102. Calculate, based on vehicle parameters, a maximum torque transmitted from the power source to the drive shaft and a maximum ground slip torque transmitted to the drive shaft due to ground slip.

[0067] In this embodiment, the maximum torque includes the maximum torque transmitted to the drive shaft by the forward gear power source and the maximum torque transmitted to the drive shaft by the reverse gear power source.

[0068] S103: Calculate the applied torque in the forward gear and the applied torque in the reverse gear according to the maximum torque and the maximum ground slip torque.

[0069] S104: Calculate the yield torque and the breaking torque of the drive shaft according to the applied torque in the forward gear and the applied torque in the reverse gear.

[0070] S105. Determine a theoretical torque combination according to the yield torque of the drive shaft and the breaking torque of the drive shaft.

[0071] S106. Select a target drive shaft product from the drive shaft products to be selected based on the theoretical torque combination and the torque combination of the drive shaft products to be selected.

[0072] In this embodiment, the execution subject of the method may be a computing device such as a computer or a server, and no limitation is made in this embodiment.

[0073] In this embodiment, the execution subject of the method may also be a smart device such as a smart phone, a tablet computer, etc., which is not limited in this embodiment.

[0074] It can be seen that the drive shaft product selection method described in this embodiment can quickly select a suitable drive shaft product for the vehicle in a comprehensive and accurate manner according to the needs of the entire vehicle. The selection process is simple and reliable, which improves the efficiency of vehicle design.

[0075] Example 2

[0076] Please see Figure 2 , Figure 2 A schematic diagram of a process flow of a drive shaft product selection method provided in this embodiment. The drive shaft product selection method includes:

[0077] S201, obtaining vehicle parameters of the target vehicle.

[0078] In this embodiment, the target vehicle is a vehicle that needs to have a drive shaft selected.

[0079] S202. Calculate the maximum torque of the power source, the total forward gear speed ratio, the total reverse gear speed ratio, the total forward gear efficiency, the total reverse gear efficiency, the maximum axle load, the tire radius, the wheelbase, the full-load center of mass height, and the ground adhesion coefficient based on the vehicle parameters.

[0080] S203: Calculate the maximum torque transmitted from the forward gear power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, and the total efficiency of the forward gear.

[0081] S204: Calculate the maximum torque transmitted from the reverse gear power source to the drive shaft according to the maximum torque of the power source, the total reverse gear speed ratio, and the total reverse gear efficiency.

[0082] In this embodiment, the calculation formula of the maximum torque transmitted from the power source to the drive shaft in forward gear and reverse gear is as follows:

[0083] T e，F =T emax *i F *η F / 2;

[0084] Te,R =T emax *i R *η R / 2;

[0085] Among them, T e，F The maximum torque transmitted from the power source to the drive shaft in the forward gear;

[0086] T e，R It is the maximum torque transmitted from the power source to the drive shaft in reverse gear;

[0087] T emax is the maximum torque of the power source;

[0088] i F is the total speed ratio of the forward gear (the total speed ratio between the power source and the drive shaft when in the forward gear);

[0089] i R is the total speed ratio of reverse gear (the total speed ratio between the power source and the drive shaft when in reverse gear);

[0090] η F is the total efficiency of the forward gear (the total efficiency between the power source and the drive shaft in the forward gear);

[0091] η R It is the total speed efficiency of reverse gear (the total efficiency between the power source and the drive shaft in reverse gear).

[0092] S205. Calculate the maximum ground slip torque transmitted to the drive shaft due to ground slip according to the maximum axle load, tire radius, wheelbase, full-load center of mass height, and ground adhesion coefficient.

[0093] In this embodiment, the maximum ground slip torque includes the maximum torque transmitted to the drive shaft by the forward gear power source and the maximum torque transmitted to the drive shaft by the reverse gear power source.

[0094] In this embodiment, the calculation formulas for the maximum ground slip torque of the wheels in forward gear and reverse gear are divided into two different calculation formulas for the front and rear drive shafts, which are as follows:

[0095] For the front drive shaft:

[0096] T sF =4.9*μ*Q max *R s *L / (L+μ*H);

[0097] T s，R =4.9*μ*Q max *R s *L / (L-μ*H)

[0098] For the rear drive shaft:

[0099] T s，F =4.9*μ*Q max *R s *L / (L-μ*H);

[0100] T s，R =4.9*μ*Q max *R s *L / (L+μ*H);

[0101] Among them, T s，F It is the maximum wheel slip torque in the forward gear;

[0102] T s，R It is the maximum slip torque of the wheel in reverse gear;

[0103] μ is the ground adhesion coefficient; specifically, μ=0.8-1, or corrected according to the measured friction coefficient of the road in the area where the vehicle is used;

[0104] Q max is the maximum load of the axle (fully loaded mass);

[0105] R s is the tire radius;

[0106] L is the wheelbase;

[0107] H is the height of the center of mass when fully loaded.

[0108] S206 , obtaining a safety factor, a ground adhesion torque impact coefficient, a torque calculated on the drive shaft from the forward gear torque limit torque, and a torque calculated on the drive shaft from the reverse gear torque limit torque.

[0109] S207, calculating the applied torque in the forward gear according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in the forward gear, and the torque calculated on the drive shaft by the forward gear torque limit.

[0110] S208, calculating the applied torque in reverse gear according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in reverse gear, and the torque calculated on the drive shaft by the reverse gear torque limit.

[0111] In this embodiment, the maximum torque transmitted from the power source to the drive shaft and the torque limit torque calculated to the torque on the drive shaft have a safety factor of k1, the ground adhesion torque impact factor is k2, and the formula for the applied torque in the forward gear and reverse gear is as follows:

[0112] T F =min(T e，F *k1,T F，LIMIT *k1,T s，F *k2);

[0113] TR =min(T e,R *k1,T R，LIMIT *k1,T s，R *k2);

[0114] Among them, T F is the applied torque in forward gear;

[0115] T R is the applied torque in reverse gear;

[0116] T e，F The maximum torque transmitted from the power source to the drive shaft in the forward gear;

[0117] T e，R It is the maximum torque transmitted from the power source to the drive shaft in reverse gear;

[0118] k1 is the maximum torque transmitted from the power source to the drive shaft and the safety factor of the torque calculated on the drive shaft by the torque limit torque; when the vehicle is a fuel vehicle, k1 = 2.4 ~ 2.6; when the vehicle is a new energy vehicle (pure electric, hybrid, fuel cell, etc.), k1 = 2.7 ~ 3;

[0119] T F，LIMIT The torque calculated to the drive shaft for the forward gear torque limit torque;

[0120] T R，LIMIT The torque calculated to the drive shaft for the reverse gear torque limit torque;

[0121] T s，F It is the maximum wheel slip torque in the forward gear;

[0122] T s，R It is the maximum slip torque of the wheel in reverse gear;

[0123] k2 is the ground adhesion torque impact coefficient; the value can be k2=2~2.2, or corrected according to experimental test data.

[0124] S209: Calculate the driving shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear.

[0125] In this embodiment, the breaking torque is the larger value of the applied torque in the forward gear and the reverse gear, and the formula is as follows:

[0126] T d =max(T F ,T R );

[0127] Among them, T d Requires breaking torque for the drive shaft;

[0128] T F is the applied torque in forward gear;

[0129] T R is the applied torque in reverse gear.

[0130] S210, calculating the yield torque of the drive shaft according to the preset universal joint yield torque safety factor and the drive shaft breaking torque.

[0131] In this embodiment, the yield torque is the breaking torque divided by the coefficient k3, and the formula is as follows:

[0132] T y =T d / k3;

[0133] Among them, T y Yield torque for drive shaft requirements;

[0134] T d Requires breaking torque for the drive shaft;

[0135] k3 is the safety factor of the yield torque of the universal joint; specifically, k3=1.3~1.5, or corrected according to the bench test data of the drive shaft product.

[0136] S211. Determine the theoretical yield torque according to the yield torque of the drive shaft.

[0137] S212. Determine the theoretical breaking torque of the drive shaft product according to the breaking torque of the drive shaft.

[0138] S213. Determine a theoretical torque combination according to the theoretical yield torque and the theoretical fracture torque.

[0139] S214. Select a target drive shaft product from the drive shaft products to be selected based on the theoretical torque combination and the torque combination of the drive shaft products to be selected.

[0140] In this embodiment, the theoretical yield torque and fracture torque of the drive shaft product are greater than the required yield torque and fracture torque, that is, the following two formulas are satisfied at the same time.

[0141] T y,L ≥T y ;

[0142] T d，L ≥T d ;

[0143] Among them, T y，L is the theoretical yield torque of the drive shaft;

[0144] T y Yield torque for drive shaft requirements;

[0145] T d，L is the theoretical breaking torque of the drive shaft;

[0146] T d The breaking torque is required for the drive shaft.

[0147] For example, in order to achieve modularization and reduce the types of drive shaft products, the theoretical yield torque and fracture torque are segmented, that is, there are many combinations of (theoretical yield torque, theoretical fracture torque), such as (3300, 4450), (3700, 4995), (4100, 5535), (4600, 6210), etc. When the required yield torque and fracture torque are calculated to be 3600 and 4860 respectively according to this method, the drive shaft product (3700, 4995) is preferred; at this time, if the product (4600, 6210) is selected, the design redundancy will be too large; if the product (3300, 4450) is selected, there will be a risk of insufficient strength and life.

[0148] Please see Figure 3 , Figure 3 An example flow chart of a method for selecting a drive shaft product is shown.

[0149] Please see Figure 4 , Figure 4 A schematic diagram of a drive shaft structure is shown.

[0150] In this embodiment, the execution subject of the method may be a computing device such as a computer or a server, and no limitation is made in this embodiment.

[0151] In this embodiment, the execution subject of the method may also be a smart device such as a smart phone, a tablet computer, etc., which is not limited in this embodiment.

[0152] It can be seen that the drive shaft product selection method described in this embodiment can quickly select a suitable drive shaft product for the vehicle in a comprehensive and accurate manner according to the needs of the entire vehicle. The selection process is simple and reliable, which improves the efficiency of vehicle design.

[0153] Example 3

[0154] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a drive shaft product selection device provided in this embodiment. Figure 5 As shown, the drive shaft product selection device includes:

[0155] The acquisition unit 310 is used to acquire the whole vehicle parameters of the target vehicle; wherein the target vehicle is a vehicle for which a drive shaft selection is required;

[0156] The first calculation unit 320 is used to calculate the maximum torque transmitted from the power source to the drive shaft and the maximum ground slip torque transmitted to the drive shaft due to ground slip according to the vehicle parameters;

[0157] A second calculation unit 330, configured to calculate an applied torque in a forward gear and an applied torque in a reverse gear according to the maximum torque and the maximum ground slip torque;

[0158] A third calculation unit 340 is used to calculate the drive shaft yield torque and the drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear;

[0159] A determination unit 350, configured to determine a theoretical torque combination according to the yield torque of the drive shaft and the breaking torque of the drive shaft;

[0160] The selection unit 360 is used to select a target drive shaft product from the drive shaft products to be selected according to the theoretical torque combination and the torque combination of the drive shaft products to be selected.

[0161] In this embodiment, the explanation of the drive shaft product selection device can refer to the description in Example 1 or Example 2, and will not be further elaborated in this embodiment.

[0162] It can be seen that the drive shaft product selection device described in this embodiment can quickly select a suitable drive shaft product for the vehicle according to the needs of the whole vehicle in a comprehensive and accurate manner. The selection process is simple and reliable, which improves the efficiency of vehicle design.

[0163] Example 4

[0164] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a drive shaft product selection device provided in this embodiment. Figure 6 As shown, the drive shaft product selection device includes:

[0165] The acquisition unit 310 is used to acquire the whole vehicle parameters of the target vehicle; wherein the target vehicle is a vehicle for which a drive shaft selection is required;

[0166] The first calculation unit 320 is used to calculate the maximum torque transmitted from the power source to the drive shaft and the maximum ground slip torque transmitted to the drive shaft due to ground slip according to the vehicle parameters;

[0167] A second calculation unit 330, configured to calculate an applied torque in a forward gear and an applied torque in a reverse gear according to the maximum torque and the maximum ground slip torque;

[0168] A third calculation unit 340 is used to calculate the drive shaft yield torque and the drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear;

[0169] A determination unit 350, configured to determine a theoretical torque combination according to the yield torque of the drive shaft and the breaking torque of the drive shaft;

[0170] The selection unit 360 is used to select a target drive shaft product from the drive shaft products to be selected according to the theoretical torque combination and the torque combination of the drive shaft products to be selected.

[0171] As an optional implementation, the first calculation unit 320 includes:

[0172] The first calculation subunit 321 is used to calculate the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, the total efficiency of the reverse gear, the maximum load of the axle, the tire radius, the wheelbase, the full load center of mass height and the ground adhesion coefficient according to the vehicle parameters;

[0173] The second calculation subunit 322 is used to calculate the maximum torque transmitted from the power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, and the total efficiency of the reverse gear; wherein the maximum torque includes the maximum torque transmitted from the forward gear power source to the drive shaft and the maximum torque transmitted from the reverse gear power source to the drive shaft;

[0174] The third calculation subunit 323 is used to calculate the maximum ground slip torque transmitted to the drive shaft due to ground slip based on the maximum axle load, tire radius, wheelbase, fully loaded center of mass height and ground adhesion coefficient, wherein the maximum ground slip torque includes the maximum torque transmitted to the drive shaft by the forward gear power source and the maximum torque transmitted to the drive shaft by the reverse gear power source.

[0175] As an optional implementation manner, the second calculation subunit 322 is specifically used to calculate the maximum torque transmitted from the forward gear power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, and the total efficiency of the forward gear;

[0176] The second calculation subunit 322 is further configured to calculate the maximum torque transmitted from the reverse gear power source to the drive shaft according to the maximum torque of the power source, the total reverse gear speed ratio, and the total reverse gear efficiency.

[0177] As an optional implementation, the second calculation unit 330 includes:

[0178] An acquisition subunit 331 is used to acquire a safety factor, a ground adhesion torque impact coefficient, a torque calculated on the drive shaft by the forward gear torque limit torque, and a torque calculated on the drive shaft by the reverse gear torque limit torque;

[0179] The fourth calculation subunit 332 is used to calculate the applied torque in the forward gear according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in the forward gear, and the torque calculated on the drive shaft by the forward gear torque limit torque;

[0180] The fourth calculation subunit 332 is further used to calculate the applied torque in reverse gear according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in reverse gear, and the torque calculated on the drive shaft by the reverse gear torque limit.

[0181] As an optional implementation, the third calculation unit 340 is specifically configured to calculate the driving shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear;

[0182] The third calculation unit 340 is further configured to calculate the yield torque of the drive shaft according to a preset safety factor of the yield torque of the universal joint and the breaking torque of the drive shaft.

[0183] As an optional implementation, the determination unit 350 is specifically configured to determine the theoretical yield torque according to the yield torque of the drive shaft;

[0184] The determination unit 350 is further configured to determine a theoretical breaking torque of the drive shaft product according to the breaking torque of the drive shaft;

[0185] The determination unit 350 is further configured to determine a theoretical torque combination according to the theoretical yield torque and the theoretical fracture torque.

[0186] In this embodiment, the explanation of the drive shaft product selection device can refer to the description in Example 1 or Example 2, and will not be further elaborated in this embodiment.

[0187] It can be seen that the drive shaft product selection device described in this embodiment can quickly select a suitable drive shaft product for the vehicle according to the needs of the whole vehicle in a comprehensive and accurate manner. The selection process is simple and reliable, which improves the efficiency of vehicle design.

[0188] An embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the drive shaft product selection method in Embodiment 1 or Embodiment 2 of the present application.

[0189] An embodiment of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the drive shaft product selection method in Embodiment 1 or Embodiment 2 of the present application is executed.

[0190] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0191] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0192] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0193] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0194] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0195] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A method for selecting a drive shaft product, characterized in that: include: Obtaining vehicle parameters of a target vehicle; wherein the target vehicle is a vehicle for which a drive shaft selection is required; According to the vehicle parameters, calculating the maximum torque transmitted from the power source to the drive shaft and the maximum ground slip torque transmitted to the drive shaft due to ground slip; Calculating an applied torque in a forward gear and an applied torque in a reverse gear according to the maximum torque and the maximum ground slip torque; Calculating a drive shaft yield torque and a drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear; Determining a theoretical torque combination according to the drive shaft yield torque and the drive shaft breaking torque; A target drive shaft product is selected from the drive shaft products to be selected based on the theoretical torque combination and the torque combination of the drive shaft products to be selected.

2. The method for selecting drive shaft products according to claim 1, characterized in that: The calculating, based on the vehicle parameters, the maximum torque transmitted from the power source to the drive shaft and the maximum ground slip torque transmitted to the drive shaft due to ground slip, comprises: According to the vehicle parameters, the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, the total efficiency of the reverse gear, the maximum load of the axle, the tire radius, the wheelbase, the height of the center of mass with full load and the ground adhesion coefficient are calculated; Calculate the maximum torque transmitted from the power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, and the total efficiency of the reverse gear; wherein the maximum torque includes the maximum torque transmitted from the forward gear power source to the drive shaft and the maximum torque transmitted from the reverse gear power source to the drive shaft; The maximum ground slip torque transmitted to the drive shaft due to ground slip is calculated based on the maximum axle load, the tire radius, the wheelbase, the fully loaded center of mass height and the ground adhesion coefficient, wherein the maximum ground slip torque includes the maximum torque transmitted to the drive shaft by the forward gear power source and the maximum torque transmitted to the drive shaft by the reverse gear power source.

3. The method for selecting drive shaft products according to claim 1, characterized in that: The calculating the maximum torque transmitted from the power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, and the total efficiency of the reverse gear comprises: Calculating the maximum torque transmitted to the drive shaft by the forward gear power source according to the maximum torque of the power source, the forward gear total speed ratio and the forward gear total efficiency; The maximum torque transmitted from the reverse gear power source to the drive shaft is calculated according to the maximum torque of the power source, the total reverse gear speed ratio and the total reverse gear efficiency.

4. The method for selecting drive shaft products according to claim 2, characterized in that: The calculating, according to the maximum torque and the maximum ground slip torque, the applied torque in the forward gear and the applied torque in the reverse gear comprises: Obtain the safety factor, the ground adhesion torque impact coefficient, the torque calculated on the drive shaft by the forward gear torque limit torque, and the torque calculated on the drive shaft by the reverse gear torque limit torque; Calculate the applied torque in the forward gear according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in the forward gear, and the torque calculated on the drive shaft by the forward gear torque limit torque; The applied torque in reverse gear is calculated according to the safety factor, the ground adhesion torque impact coefficient, the maximum torque transmitted to the drive shaft by the power source in reverse gear, and the torque calculated on the drive shaft by the reverse gear torque limit torque.

5. The method for selecting drive shaft products according to claim 1, characterized in that: The step of calculating the yield torque and the breaking torque of the drive shaft according to the applied torque in the forward gear and the applied torque in the reverse gear comprises: Calculating the drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear; The yield torque of the drive shaft is calculated according to the preset universal joint yield torque safety factor and the breaking torque of the drive shaft.

6. The method for selecting drive shaft products according to claim 1, characterized in that: The determining of the theoretical torque combination according to the yield torque of the drive shaft and the breaking torque of the drive shaft comprises: determining a theoretical yield torque according to the drive shaft yield torque; Determine the theoretical breaking torque of the drive shaft product according to the breaking torque of the drive shaft; A theoretical torque combination is determined based on the theoretical yield torque and the theoretical breaking torque.

7. A drive shaft product selection device, characterized in that: The drive shaft product selection device comprises: An acquisition unit, used for acquiring vehicle parameters of a target vehicle; wherein the target vehicle is a vehicle for which a drive shaft selection is required; A first calculation unit is used to calculate the maximum torque transmitted to the drive shaft by the power source and the maximum ground slip torque transmitted to the drive shaft due to ground slip according to the vehicle parameters; a second calculation unit, configured to calculate an applied torque in a forward gear and an applied torque in a reverse gear according to the maximum torque and the maximum ground slip torque; a third calculation unit, configured to calculate a drive shaft yield torque and a drive shaft breaking torque according to the applied torque in the forward gear and the applied torque in the reverse gear; a determination unit, configured to determine a theoretical torque combination according to the drive shaft yield torque and the drive shaft breaking torque; A selection unit is used to select a target drive shaft product from the drive shaft products to be selected according to the theoretical torque combination and the torque combination of the drive shaft products to be selected.

8. The drive shaft product selection device according to claim 7, characterized in that: The first computing unit comprises: A first calculation subunit is used to calculate the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, the total efficiency of the reverse gear, the maximum load of the axle, the tire radius, the wheelbase, the full load center of mass height and the ground adhesion coefficient according to the vehicle parameters; a second calculation subunit, configured to calculate a maximum torque transmitted from the power source to the drive shaft according to the maximum torque of the power source, the total speed ratio of the forward gear, the total speed ratio of the reverse gear, the total efficiency of the forward gear, and the total efficiency of the reverse gear; wherein the maximum torque includes the maximum torque transmitted from the forward gear power source to the drive shaft and the maximum torque transmitted from the reverse gear power source to the drive shaft; The third calculation subunit is used to calculate the maximum ground slip torque transmitted to the drive shaft due to ground slip based on the maximum load of the axle, the tire radius, the wheelbase, the fully loaded center of mass height and the ground adhesion coefficient, wherein the maximum ground slip torque includes the maximum torque transmitted to the drive shaft by the forward gear power source and the maximum torque transmitted to the drive shaft by the reverse gear power source.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the drive shaft product selection method according to any one of claims 1 to 6.

10. A readable storage medium, characterized in that: The readable storage medium stores computer program instructions, and when the computer program instructions are read and executed by a processor, the drive shaft product selection method according to any one of claims 1 to 6 is executed.

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