Design method and device for clamping spring of driving shaft and computer readable storage medium

Abstract

The invention relates to the field of workpiece manufacturing, in particular to a design method and device for a clamping spring of a driving shaft and a computer readable storage medium. The design method of the drive shaft snap spring comprises the steps that a drive shaft snap spring calculation model is defined according to snap spring matching requirements and preset matching parameters of a snap spring matching part; determining an initial value range of all key parameters of the snap spring according to preset matching parameters; and inputting the initial value ranges of all the key parameters into the driving shaft snap spring calculation model to obtain all qualified parameter combinations meeting snap spring matching requirements. According to the method, the calculation model is defined according to the related matching parameters of the component matched with the snap spring, then the value ranges of all the key parameters of the snap spring are combined to form the multiple key parameter design combinations, and finally the design combinations which do not meet the design requirements are screened out through the calculation model. Therefore, a drive shaft snap spring design matching combination meeting design requirements is obtained.

Description

Technical Field

[0001] The present application relates to the field of workpiece manufacturing, and particularly to a design method, device and computer-readable storage medium for a drive shaft circlip. Background Art

[0002] With the development of the automotive industry, people's attention to automotive safety has gradually increased. Vehicle manufacturers have higher requirements for the efficiency and stability of automotive parts manufacturing. The automotive drive shaft circlip plays a role in positioning and restricting the drive shaft. If the circlip is designed too large, it will cause difficulties or impossibility in assembling the drive shaft, resulting in great difficulties in drive shaft assembly. At the same time, it may also lead to the inability to disassemble from the reducer when replacing the drive shaft, causing significant economic and man-hour waste; if the circlip is designed too small, the drive shaft may come out of the reducer during vehicle driving, causing a major safety accident of vehicle breakdown.

[0003] In related technologies, when designing a circlip, an existing circlip is often selected first, and then the circlip design is adjusted according to the results of bench or vehicle tests. This method has a long verification and improvement cycle, and there is a possibility of insufficient test verification, with the risk of batch problems in after-sales. Summary of the Invention

[0004] Aiming at the problems in related technologies that the verification process for drive shaft circlip design is complex, and there is insufficient verification, which affects the quality of mass production.

[0005] In a first aspect, an embodiment of the present application provides a design method for a drive shaft circlip, and the design method includes:

[0006] Defining a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components cooperating with the circlip;

[0007] Determining the initial value ranges of all key parameters of the circlip according to the preset fitting parameters;

[0008] Inputting the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements.

[0009] Combined with the first aspect, in an implementation manner, the determining the initial value ranges of all key parameters of the circlip according to the preset fitting parameters includes: determining the initial value ranges of the wire cross-sectional diameter, circlip outer diameter, circlip inner diameter, circlip groove bottom diameter, and circlip opening width according to the preset fitting parameters.

[0010] Combined with the first aspect, in an implementation manner, the determining the initial value range of the wire cross-sectional diameter according to the preset fitting parameters includes: determining the initial value range of the wire cross-sectional diameter of the circlip according to the preset minor diameter of the internal spline.

[0011] In combination with the first aspect, in one embodiment, the step of determining the initial value range of the outer diameter of the circlip according to the preset fitting parameters includes: determining the initial value range of the outer diameter of the circlip according to the preset major diameter of the external spline.

[0012] In combination with the first aspect, in one embodiment, the step of determining the initial value range of the inner diameter of the circlip according to the preset fitting parameters includes: calculating the initial value range of the inner diameter of the circlip according to the preset root circle diameter of the external spline, the center line diameter of the circlip wire, and the cross-sectional diameter of the wire.

[0013] In combination with the first aspect, in one embodiment, the step of determining the initial value range of the bottom diameter of the circlip groove according to the preset fitting parameters includes: determining the initial value range of the bottom diameter of the circlip groove according to the inner diameter of the circlip.

[0014] In combination with the first aspect, in one embodiment, the step of defining a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components cooperating with the circlip includes: defining a drive shaft circlip calculation model according to the minor diameter of the external spline, the major diameter of the external spline, the major diameter of the internal spline, the bottom diameter of the differential gear circlip groove, and the pitch type specification.

[0015] In combination with the first aspect, in one embodiment, the step of inputting the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements includes:

[0016] Forming multiple candidate design combinations of the circlip key parameters according to the initial value ranges of different key parameters;

[0017] Inputting all candidate design combinations into the drive shaft circlip calculation model to calculate and screen out the candidate design combinations that meet the circlip fitting requirements as qualified parameter combinations.

[0018] In a second aspect, an embodiment of the present application provides a design device for a drive shaft circlip, and the design device includes:

[0019] A model definition module, configured to define a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components cooperating with the circlip;

[0020] A value taking module, configured to determine the initial value ranges of all key parameters of the circlip according to the preset fitting parameters;

[0021] A calculation module, configured to input the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements.

[0022] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a design method for a drive shaft circlip is stored. When a program of the design method for the drive shaft circlip is executed by a processor, the steps of the design method for the drive shaft circlip as described in any one of the above are implemented.

[0023] The beneficial effects brought by the technical solution provided by the embodiment of the present application include:

[0024] In the present application, a calculation model is defined according to the relevant mating parameters of the components cooperating with the circlip, and then the value ranges of each key parameter of the circlip are combined with each other to form a plurality of key parameter design combinations. Finally, the calculation model is used to screen out the design combinations that do not meet the design requirements, so as to obtain a drive shaft circlip design matching combination that meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic flowchart of an embodiment of the design method for the drive shaft circlip of the present application;

[0026] Figure 2 It is a schematic diagram of the drive shaft circlip of the present application;

[0027] Figure 3 It is a schematic hardware structure diagram of the design device for the drive shaft circlip involved in the solution of the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] In view of the problems in the related art that the verification process is complex during the design of the drive shaft circlip, and there is insufficient verification, which affects the quality of mass production.

[0030] In a first aspect, an embodiment of the present application provides a design method for a drive shaft circlip, and the design method includes:

[0031] Step S1: Define a drive shaft circlip calculation model according to the circlip mating requirements and the preset mating parameters of the components cooperating with the circlip.

[0032] It should be noted that the design principle of the circlip mating requirements is determined according to the circlip assembly method. For details, see the following circlip assembly schematic diagram. Four parameters need to be finally determined for the circlip matching design. The cross-sectional diameter of the circlip wire (such as Figure 2Marking A1), the outer diameter of the circlip (such as Figure 2 Marking A2), the opening width (such as Figure 2 Marking A3) and the bottom diameter of the circlip groove on the drive shaft. Further, during the assembly of the circlip, the small diameter of the internal spline of the bevel gear squeezes the circlip. When the circlip is squeezed, two points should be ensured: First, the inner diameter of the circlip should be greater than the outer diameter of the circlip groove on the drive shaft; Second, it is necessary to ensure that the circlip opening will not be jammed. When assembled into the circlip groove of the bevel gear, the circlip springs open and locks.

[0033] In some specific embodiments, the relevant parameters involved in the design calculation of the circlip are shown in Table 2 below:

[0034] Table 2 Table of relevant parameters for circlip design

[0035] Serial Number Name Code Unit Value 1 Root Circle Diameter of External Spline <![CDATA[D re > mm 2 Major Diameter of External Spline <![CDATA[D O > mm 3 Root Circle Diameter of Internal Spline <![CDATA[D ri > mm 4 Minor Diameter of Internal Spline <![CDATA[D i > mm 5 Cross-Sectional Diameter of Snap Ring Wire <![CDATA[d s > mm 6 Outside Diameter of Snap Ring <![CDATA[d O > mm 7 Inside Diameter of Snap Ring <![CDATA[d i > mm 8 Opening Width of Snap Ring H mm 9 Bottom Diameter of Snap Ring Groove for Differential Gear <![CDATA[D d > mm 10 Bottom Diameter of Snap Ring Groove for Drive Shaft <![CDATA[d g > mm 11 Minimum Bottom Diameter of Snap Ring Groove for Drive Shaft <![CDATA[d gmin > mm 12 Length of Snap Ring Wire L mm 13 Center Line Diameter of Snap Ring Wire <![CDATA[D c > mm 14 Corresponding Angle of Snap Ring Opening <![CDATA[θ1]]> °

[0036] It can be understood that among the design parameters in the above table, as described above, the cross-sectional diameter of the circlip wire, the outer diameter of the circlip, the opening width, and the bottom diameter of the circlip groove on the drive shaft are the key parameters to be determined, and the remaining parameters are the relevant preset fitting parameters of the components (such as splines) that cooperate with the circlip before design and the circlip design parameters derived from the key parameters of the circlip. Further, the derived circlip design parameters are used to verify whether the circlip meets the circlip fitting requirements in the subsequent step calculation model.

[0037] In some preferred embodiments, the qualified parameter combinations that meet the circlip fitting method calculated and screened by the drive shaft circlip calculation model need to meet the following calculation requirements:

[0038] πd gmin -L≈0.5

[0039]

[0040] θ1=2arcsin[H / (D c -d s )]

[0041]

[0042] L={π-arcsin[H / (D c -d s )]}(D c -d s )

[0043] πd gmin -{π-arcsin[H / (D c -d s )]}(D c -d s )=(0.5~1)

[0044] It should be noted that during the assembly process, the circlip will be compressed by the minor diameter of the internal spline, and at this time, the assembly should not be difficult. And the opening width should be as small as possible. Otherwise, after the circlip is assembled onto the half shaft, the circlip will sag too much in the free state, affecting the assembly of the drive shaft. To ensure that the circlip is freely compressed without any restriction during the assembly of the drive shaft, the above formula is derived based on the principle of ensuring that the opening does not get jammed during the assembly and compression of the circlip.

[0045] Furthermore, during the assembly, the circlip is squeezed by the internal spline of the bevel gear. At this time, it should be ensured that the two ends of the opening do not get jammed, and the circumference of the bottom diameter of the circlip groove on the drive shaft should be greater than the length of the circlip. Therefore, the defined range is between 0.5 and 1.

[0046] Step S2: Determine the initial value range of all key parameters of the circlip according to the preset fitting parameters.

[0047] It should be noted that the variable parameters of the circlip can be pre-given an initial value range according to the known parameters. However, different combinations of different values of key parameters will affect the actual use effect of the formed circlip. Therefore, during the design, the key parameters cannot be designed individually one by one, and it is necessary to consider whether the combined effect of different key parameters meets the fitting requirements.

[0048] In some specific embodiments, the above step S2 includes: determining the initial value range of the wire cross-sectional diameter, the outer diameter of the circlip, the inner diameter of the circlip, the bottom diameter of the circlip groove, and the opening width of the circlip according to the preset fitting parameters.

[0049] Specifically, the above specific embodiments include:

[0050] Step S2a: Determine the initial value range of the wire cross-sectional diameter according to the preset minor diameter of the internal spline.

[0051] Specifically, the wire cross-sectional diameter d s needs to satisfy the following formula:

[0052] d g +2d s <D i

[0053] In the formula, d g is the bottom diameter of the circlip groove on the drive shaft, d s is the wire cross-sectional diameter, and D i is the minor diameter of the internal spline.

[0054] It can be understood that it is recommended to use a circlip with a wire cross-sectional diameter of 1.6 mm for the pitch type specifications of 2000 and below, and a circlip with a wire cross-sectional diameter of 2.0 mm for the pitch type specifications above 2000.

[0055] Step S2b: Determine the initial value range of the outer diameter of the circlip according to the preset major diameter of the external spline.

[0056] Specifically, the outer diameter d of the circlip o needs to satisfy the following formula:

[0057] d O > D O

[0058] In the formula, D O is the major diameter of the external spline.

[0059] Furthermore, the outer diameter d of the circlip O should be as close as possible to the bottom diameter D of the circlip groove of the differential gear, that is, d d ≈ D O d .

[0060] Step S2c: Calculate the initial value range of the inner diameter of the circlip according to the preset root circle diameter of the external spline, the center line diameter of the circlip wire, and the cross-sectional diameter of the wire.

[0061] Specifically, the inner diameter d of the circlip i needs to satisfy the following formula:

[0062] d i < D re

[0063] D c = (D O + D re ) / 2

[0064] d i = D c - d s

[0065] In the formula, D re is the root circle diameter of the external spline, D c is the center line diameter of the circlip wire, D O is the major diameter of the external spline, and d s is the cross-sectional diameter of the circlip wire.

[0066] Step S2d: Determine the initial value range of the bottom diameter of the circlip groove according to the inner diameter of the circlip.

[0067] Specifically, the bottom diameter d of the circlip groove g satisfies the following formula:

[0068] d g < d i = D c - d s

[0069] In the formula, d i is the inner diameter of the circlip.

[0070] ​Step S3: Input the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements.

[0071] Specifically, the above-mentioned step S3 includes:

[0072] Step S3a: Form multiple candidate design combinations of circlip key parameters according to the initial value ranges of different key parameters.

[0073] It should be noted that, as mentioned above, multiple key parameters need to be determined in the circlip design (such as the wire cross-sectional diameter, circlip outer diameter, circlip inner diameter, and circlip groove bottom diameter in the above-mentioned embodiment). In step S2, approximate initial ranges are selected for all key parameters. In the above-mentioned step S3a, different values are selected from the respective initial ranges of different key parameters for combination to obtain multiple candidate design combinations. However, as mentioned above, the key parameters cannot be determined individually, and subsequent steps are required to verify the formed candidate design combinations.

[0074] Step S3b: Input all candidate design combinations into the drive shaft circlip calculation model to calculate and screen out the candidate design combinations that meet the circlip fitting requirements as qualified parameter combinations.

[0075] Specifically, the drive shaft circlip calculation model is calculated according to the following formula:

[0076] πd gmin -L≈0.5

[0077]

[0078] θ1=2arcsin[H / (D c -d s )]

[0079]

[0080] L={π - arcsin[H / (D c -d s )]}(D c -d s )

[0081] πd gmin -{π - arcsin[H / (D c -d s )]}(D c -d s )=B

[0082] Further, if the value of the calculation result B of the above drive shaft circlip calculation model formula is within the range of 0.5 to 1, it is determined that the to-be-selected design combination is qualified and can be used as a qualified parameter combination; otherwise, it is unqualified.

[0083] It can be understood that during assembly, the circlip is squeezed by the internal spline of the bevel gear. At this time, it should be ensured that the two ends of the opening do not jam, and the circumference of the bottom diameter of the drive shaft circlip groove should be greater than the length of the circlip. Therefore, the range 0.5 - 1 is defined.

[0084] In summary, the present application defines a calculation model based on the relevant fitting parameters of the components cooperating with the circlip, then combines the value ranges of all key parameters of the circlip to form multiple key parameter design combinations, and finally uses the calculation model to screen out the design combinations that do not meet the design requirements, so as to obtain a drive shaft circlip design matching combination that meets the design requirements.

[0085] In a second aspect, the present application provides a design device for a drive shaft circlip. The design device includes: a model definition module, a value taking module, and a calculation module; wherein,

[0086] The model definition module is used to define a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components cooperating with the circlip; the value taking module is used to determine the initial value range of all key parameters of the circlip according to the preset fitting parameters; the calculation module is used to input the initial value range of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements.

[0087] In some optional implementation manners, the qualified parameter combinations that meet the circlip fitting manner calculated and screened by the drive shaft circlip calculation model defined by the model definition module need to meet the following calculation requirements:

[0088] πd gmin -L≈0.5

[0089]

[0090] θ1 = 2arcsin[H / (D c -d s )]

[0091]

[0092] L = {π - arcsin[H / (D c -d s )]}(D c -d s )

[0093] πd gmin -{π - arcsin[H / (D c -ds )]}(D c -d s ) = (0.5 to 1)

[0094] It should be noted that during the assembly process, the circlip will be compressed by the minor diameter of the internal spline. At this time, the assembly should not be difficult. And the opening width should be as small as possible. Otherwise, after the circlip is assembled onto the half shaft, the circlip will sag too much in the free state, affecting the assembly of the drive shaft. To ensure that the circlip is freely compressed without any restrictions during the assembly process of the drive shaft, the above formula is derived based on the principle of ensuring that the opening does not jam during the assembly and compression process of the circlip.

[0095] Furthermore, during assembly, the circlip is squeezed by the internal spline of the bevel gear. At this time, it should be ensured that the two ends of the opening do not jam, and the circumference of the bottom diameter of the circlip groove of the drive shaft should be greater than the length of the circlip. Therefore, the defined range is between 0.5 and 1.

[0096] In some optional embodiments, the value-taking module is used to determine the initial value ranges of the wire cross-sectional diameter, circlip outer diameter, circlip inner diameter, circlip groove bottom diameter, and circlip opening width according to preset fitting parameters.

[0097] Specifically, the value-taking module determines the initial value range of the wire cross-sectional diameter according to the preset minor diameter of the internal spline. Further, the wire cross-sectional diameter d s needs to satisfy the following formula:

[0098] d g +2d s <D i

[0099] In the formula, d g is the bottom diameter of the circlip groove of the drive shaft, d s is the wire cross-sectional diameter, and D i is the minor diameter of the internal spline.

[0100] It can be understood that it is recommended to use a circlip with a wire cross-sectional diameter of 1.6 mm for pitch types 2000 and below, and a circlip with a wire cross-sectional diameter of 2.0 mm for pitch types above 2000.

[0101] Furthermore, the value-taking module determines the initial value range of the circlip outer diameter according to the preset major diameter of the external spline.

[0102] Specifically, the circlip outer diameter d o needs to satisfy the following formula:

[0103] d O >D O

[0104] In the formula, D O is the major diameter of the external spline, and the circlip outer diameter d OIt should be as close as possible to the bottom diameter D of the differential gear circlip groove d , that is, d O ≈D d .

[0105] Furthermore, the value-taking module calculates the initial value range of the circlip inner diameter according to the preset root circle diameter of the external spline, the center line diameter of the circlip wire, and the cross-sectional diameter of the wire

[0106] Specifically, the circlip inner diameter d i needs to satisfy the following formula

[0107] d i <D re

[0108] D c =(D O +D re ) / 2

[0109] d i =D c -d s

[0110] In the formula, D re is the root circle diameter of the external spline, D c is the center line diameter of the circlip wire, D O is the major diameter of the external spline, and d s is the cross-sectional diameter of the circlip wire

[0111] Furthermore, the value-taking module determines the initial value range of the circlip groove bottom diameter according to the circlip inner diameter

[0112] Specifically, the circlip groove bottom diameter d g satisfies the following formula

[0113] d g <d i =D c -d s

[0114] In the formula, d i is the circlip inner diameter

[0115] Thirdly, the embodiment of the present application provides a design device for a drive shaft circlip. The design device for the drive shaft circlip can be a device with data processing functions such as a personal computer (PC), a laptop computer, a server, etc

[0116] Referring to Figure 3 , Figure 3This is a schematic diagram of the hardware structure of the design device for the drive shaft circlip involved in the solution of the embodiment of the present application. In the embodiment of the present application, the design device for the drive shaft circlip may include a processor, a memory, a communication interface, and a communication bus.

[0117] Among them, the communication bus can be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0118] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces, etc., which are used to implement the interconnection of components inside the design device for the drive shaft circlip, as well as interfaces for implementing the interconnection between the design device for the drive shaft circlip and other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0119] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical memory, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0120] The processor can be a general-purpose processor, and the general-purpose processor can call the design program for the drive shaft circlip stored in the memory and execute the design method for the drive shaft circlip provided by the embodiment of the present application. For example, the general-purpose processor can be a central processing unit (CPU). Among them, the method executed when the design program for the drive shaft circlip is called can refer to the various embodiments of the design method for the drive shaft circlip of the present application, which will not be elaborated here.

[0121] Those skilled in the art can understand that Figure 3 the hardware structure shown in does not constitute a limitation to the present application, and it may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0122] Fourthly, the embodiment of the present application also provides a readable storage medium.

[0123] A design program for the drive shaft circlip is stored on the readable storage medium of the present application. When the design program of the drive shaft circlip is executed by a processor, the steps of the design method of the drive shaft circlip as described above are implemented.

[0124] Among them, the method implemented when the design program of the drive shaft circlip is executed includes:

[0125] Step S1: Define a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components fitted with the circlip.

[0126] It should be noted that the design principle of the circlip fitting requirements is determined according to the circlip assembly method. For details, see the circlip assembly schematic diagram below. Four parameters need to be finally determined in the circlip matching design, namely the cross-sectional diameter of the circlip wire (such as Figure 2 marked as A1), the outer diameter of the circlip (such as Figure 2 marked as A2), the opening width (such as Figure 2 marked as A3) and the bottom diameter of the drive shaft circlip groove. Further, during the circlip assembly process, the minor diameter of the internal spline of the bevel gear squeezes the circlip. When the circlip is squeezed, two points should be ensured: First, the inner diameter of the circlip should be greater than the outer diameter of the drive shaft circlip groove; Second, it is necessary to ensure that the circlip opening will not be jammed. When assembled into the bevel gear circlip groove, the circlip springs open and locks.

[0127] In some specific embodiments, the relevant parameters involved in the circlip design calculation are shown in Table 2 below:

[0128] Table 2 Circlip design related parameter table

[0129] Serial Number Name Code Unit Value 1 Root Circle Diameter of External Spline <![CDATA[D re > mm 2 Major Diameter of External Spline <![CDATA[D O > mm 3 Root Circle Diameter of Internal Spline <![CDATA[D ri > mm 4 Minor Diameter of Internal Spline <![CDATA[D i > mm 5 Cross-Sectional Diameter of Snap Ring Wire <![CDATA[d s > mm 6 Outside Diameter of Snap Ring <![CDATA[d O > mm 7 Inside Diameter of Snap Ring <![CDATA[d i > mm 8 Opening Width of Snap Ring H mm 9 Bottom Diameter of Snap Ring Groove for Differential Gear <![CDATA[D d > mm 10 Bottom Diameter of Snap Ring Groove for Drive Shaft <![CDATA[d g > mm 11 Minimum Bottom Diameter of Snap Ring Groove for Drive Shaft <![CDATA[d gmin > mm 12 Length of Snap Ring Wire L mm 13 Center Line Diameter of Snap Ring Wire <![CDATA[D c > mm 14 Corresponding Angle of Snap Ring Opening <![CDATA[θ1]]> °

[0130] It can be understood that among the design parameters in the above table, as described above, the cross-sectional diameter of the circlip wire, the outer diameter of the circlip, the opening width and the bottom diameter of the drive shaft circlip groove are the key parameters to be determined, and the remaining parameters are the relevant preset fitting parameters of the components fitted with the circlip (such as spline) known before the design and the circlip design parameters derived from the key parameters of the circlip. Further, the derived circlip design parameters are used to verify whether the circlip meets the circlip fitting requirements in the subsequent step calculation model.

[0131] In some preferred embodiments, the qualified parameter combinations that meet the circlip fitting method calculated and screened by the drive shaft circlip calculation model need to meet the following calculation requirements:

[0132] πd gmin -L≈0.5

[0133]

[0134] θ1 = 2arcsin[H / (D c -d s)]

[0135]

[0136] L = {π - arcsin[H / (D c - d s )]}(D c - d s )

[0137] πd gmin - {π - arcsin[H / (D c - d s )]}(D c - d s ) = (0.5~1)

[0138] It should be noted that during the assembly process, the circlip will be compressed by the minor diameter of the internal spline, and at this time, the assembly should not be difficult. And the opening width should be as small as possible. Otherwise, after the circlip is assembled onto the half shaft, the circlip will sag too much in the free state, affecting the assembly of the drive shaft. To ensure that the circlip is freely compressed without any restriction during the assembly process of the drive shaft, the above formula is derived based on the principle of ensuring that the opening does not jam during the assembly and compression process of the circlip.

[0139] Furthermore, during the assembly, the circlip is squeezed by the internal spline of the bevel gear. At this time, it should be ensured that the two ends of the opening do not jam, and the circumference of the bottom diameter of the circlip groove on the drive shaft should be greater than the length of the circlip. Therefore, the range is defined between 0.5 and 1.

[0140] Step S2: Determine the initial value range of all key parameters of the circlip according to the preset fitting parameters.

[0141] It should be noted that the variable parameters of the circlip can be initially given an initial value range according to the known parameters. However, different combinations of different values of key parameters will affect the actual use effect of the formed circlip. Therefore, during the design, the key parameters cannot be designed individually one by one, and it is necessary to consider whether the combined effect of different key parameters meets the fitting requirements.

[0142] In some specific embodiments, the above step S2 includes: determining the initial value ranges of the wire cross-sectional diameter, the outer diameter of the circlip, the inner diameter of the circlip, the bottom diameter of the circlip groove, and the opening width of the circlip according to the preset fitting parameters.

[0143] Specifically, the above specific embodiment includes:

[0144] Step S2a: Determine the initial value range of the wire cross-sectional diameter according to the preset minor diameter of the internal spline.

[0145] Specifically, the wire cross-sectional diameter d s needs to satisfy the following formula:

[0146] d g +2d s <D i

[0147] Wherein, d g is the bottom diameter of the snap ring groove of the drive shaft, d s is the cross-sectional diameter of the steel wire, and D i is the minor diameter of the internal spline.

[0148] It can be understood that for the recommended joint type specifications of 2000 and below, a snap ring with a cross-sectional diameter of 1.6 mm of the steel wire is selected, and for the joint type specifications above 2000, a snap ring with a cross-sectional diameter of 2.0 mm of the steel wire is selected.

[0149] Step S2b: Determine the initial value range of the outer diameter of the snap ring according to the preset major diameter of the external spline.

[0150] Specifically, the outer diameter d of the snap ring o needs to satisfy the following formula:

[0151] d O >D O

[0152] Wherein, D O is the major diameter of the external spline.

[0153] Furthermore, the outer diameter d of the snap ring o should be as close as possible to the bottom diameter D of the snap ring groove of the differential gear d , that is, d o ≈D d .

[0154] Step S2c: Calculate the initial value range of the inner diameter of the snap ring according to the preset root circle diameter of the external spline, the center line diameter of the snap ring wire and the cross-sectional diameter of the wire.

[0155] Specifically, the inner diameter d of the snap ring i needs to satisfy the following formula:

[0156] d i <D re

[0157] D c =(D O +D re ) / 2

[0158] d i =D c -d s

[0159] Wherein, D re is the root circle diameter of the external spline, D c is the center line diameter of the snap ring wire, D Ois the major diameter of the external spline, d s is the cross-sectional diameter of the circlip wire.

[0160] Step S2d: Determine the initial value range of the circlip groove bottom diameter according to the circlip inner diameter.

[0161] Specifically, the circlip groove bottom diameter d g satisfies the following formula:

[0162] d g <d i =D c -d s

[0163] In the formula, d i is the circlip inner diameter.

[0164] Step S3: Input the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements.

[0165] Specifically, the above Step S3 includes:

[0166] Step S3a: Form multiple candidate design combinations of circlip key parameters according to the initial value ranges of different key parameters.

[0167] It should be noted that as described above, multiple key parameters need to be determined in the circlip design (such as the wire cross-sectional diameter, circlip outer diameter, circlip inner diameter, and circlip groove bottom diameter in the above embodiment). In Step S2, approximate initial ranges are selected for all key parameters. In the above Step S3a, different values are selected within their respective initial ranges for different key parameters and combined to obtain multiple candidate design combinations. However, as described above, the key parameters cannot be determined individually, and subsequent steps are required to verify the formed candidate design combinations.

[0168] Step S3b: Input all candidate design combinations into the drive shaft circlip calculation model to calculate and screen out the candidate design combinations that meet the circlip fitting requirements as qualified parameter combinations.

[0169] Specifically, the drive shaft circlip calculation model is calculated according to the following formula:

[0170] πd gmin -L≈0.5

[0171]

[0172] θ1=2arcsin[H / (D c -d s )]

[0173]

[0174] L = {π - arcsin[H / (D c - d s )]}(D c - d s )

[0175] πd gmin - {π - arcsin[H / (D c - d s )]}(D c - d s ) = B

[0176] Furthermore, if the value of B, the calculation result of the calculation formula of the above drive shaft circlip calculation model, is within the range of 0.5 to 1, then it is determined that the to-be-selected design combination is qualified and can be used as a qualified parameter combination; otherwise, it is unqualified.

[0177] It should be noted that during assembly, the circlip is extruded by the internal spline of the bevel gear. At this time, it should be ensured that the two ends of the opening do not get jammed, and the circumference of the bottom diameter of the drive shaft circlip groove should be greater than the length of the circlip. Therefore, the range 0.5 - 1 is defined.

[0178] In summary, in this application, a calculation model is defined based on the relevant mating parameters of the components mating with the circlip. Then, the value ranges of each key parameter of the circlip are combined with each other to form multiple key parameter design combinations. Finally, the calculation model is used to screen out the design combinations that do not meet the design requirements, so as to obtain the drive shaft circlip design matching combination that meets the design requirements.

[0179] It should be noted that the serial numbers of the above embodiments of this application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0180] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of this application, in essence, or the part that makes a contribution to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) as described above and includes several instructions to enable a terminal device to execute the methods described in each embodiment of this application.

[0181] In the description of the specification, claims and the above-mentioned drawings of this application, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices. Descriptions such as "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit that "first", "second" and "third" are of different types.

[0182] In the description of the embodiments of this application, "exemplary", "for example" or "for instance" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary", "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary", "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0183] In the description of the embodiments of this application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B; "and / or" in the text is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "a plurality of" means two or more than two.

[0184] In some processes described in the embodiments of this application, a plurality of operations or steps appear in a specific order. However, it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of this application or may be executed in parallel. The serial numbers of the operations are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0185] The above are only the preferred embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of this application.

Claims

1. A design method for a drive shaft circlip, characterized in that The design method includes: Defining a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components cooperating with the circlip; Determining the initial value ranges of all key parameters of the circlip according to the preset fitting parameters; Inputting the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements.

2. The design method of the drive shaft circlip according to claim 1, characterized in that, The determining the initial value ranges of all key parameters of the circlip according to the preset fitting parameters includes: determining the initial value ranges of the wire cross-sectional diameter, the outer diameter of the circlip, the inner diameter of the circlip, the bottom diameter of the circlip groove, and the opening width of the circlip according to the preset fitting parameters.

3. The design method of the drive shaft circlip according to claim 2, characterized in that, The determining the initial value range of the wire cross-sectional diameter of the circlip according to the preset fitting parameters includes: determining the initial value range of the wire cross-sectional diameter of the circlip according to the preset minor diameter of the internal spline.

4. The design method of the drive shaft circlip according to claim 3, characterized in that, The determining the initial value range of the outer diameter of the circlip according to the preset fitting parameters includes: determining the initial value range of the outer diameter of the circlip according to the preset major diameter of the external spline.

5. The design method of the drive shaft circlip according to claim 4, characterized in that, The determining the initial value range of the inner diameter of the circlip according to the preset fitting parameters includes: calculating the initial value range of the inner diameter of the circlip according to the preset root circle diameter of the external spline tooth, the center line diameter of the circlip wire, and the wire cross-sectional diameter.

6. The design method of the drive shaft circlip according to claim 5, characterized in that, The determining the initial value range of the bottom diameter of the circlip groove according to the preset fitting parameters includes: determining the initial value range of the bottom diameter of the circlip groove according to the inner diameter of the circlip.

7. The design method of the drive shaft circlip according to claim 6, characterized in that, The defining a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components cooperating with the circlip includes: defining a drive shaft circlip calculation model according to the minor diameter of the external spline, the major diameter of the external spline, the major diameter of the internal spline, the bottom diameter of the differential gear circlip groove, and the section type specification.

8. The design method of the drive shaft circlip according to claim 1, characterized in that, The inputting the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements includes: Forming multiple candidate design combinations of the circlip key parameters according to the initial value ranges of different key parameters; Inputting all candidate design combinations into the drive shaft circlip calculation model to calculate and screen out the candidate design combinations that meet the circlip fitting requirements as qualified parameter combinations.

9. A design device for a drive shaft circlip, characterized in that, The design device includes: A model definition module for defining a drive shaft circlip calculation model according to the circlip fitting requirements and the preset fitting parameters of the components cooperating with the circlip; A value taking module for determining the initial value ranges of all key parameters of the circlip according to the preset fitting parameters; A calculation module for inputting the initial value ranges of all key parameters into the drive shaft circlip calculation model to obtain all qualified parameter combinations that meet the circlip fitting requirements.

10. A computer-readable storage medium, characterized in that, A design method of a drive shaft circlip is stored on the computer-readable storage medium, and when the program of the design method of the drive shaft circlip is executed by a processor, the steps of the design method of the drive shaft circlip as described in any one of claims 1 to 8 are implemented.

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