Method and device for determining gap between transmission shaft and peripheral parts

Abstract

The invention discloses a method and device for determining a gap between a transmission shaft and peripheral parts, and the method comprises the steps: obtaining a jumping curve of a vehicle rear axle, generating rear axle position data of the rear axle at different positions according to the jumping curve, generating corresponding transmission shaft position data according to the rear axle position data; obtaining a rear axle attitude position recorded when the vehicle passes through a preset working condition, generating a corresponding transmission shaft attitude position according to the rear axle attitude position, and determining a corresponding transmission shaft motion envelope according to the transmission shaft position data and the transmission shaft attitude position; dividing an area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule, obtaining position information of parts in the sub-areas, and respectively measuring gaps between the parts and the transmission shaft envelope according to the position information; and the gaps are compared with the gap standards in the corresponding sub-areas, the gaps between the transmission shaft and the parts are adjusted to meet the gap standards, and the gaps between the parts and the transmission shaft are determined. The problem that in the prior art, the gap between the transmission shaft and the part is determined inaccurately is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a method and a device for determining the clearance between a transmission shaft and surrounding components. Background Art

[0002] As the main vehicle model for current logistics, the drive shaft of light trucks is generally divided into one-stage or two-stage types. The front section of the two-stage drive shaft has a smaller range of motion. One end of the rear section of the drive shaft is fixed to the frame through a supporting fixed structure and connected to the front and rear sections of the drive shaft through a front universal joint and a spline. The other end is connected to the rear axle through a rear universal joint. This end will move with the vibration of the rear axle, forming a complex dynamic envelope.

[0003] Therefore, during the project development phase, the dynamic clearance between this section of the drive shaft and the surrounding components needs to be considered during layout verification. The current common practice is to generate the remote envelope of the drive shaft for clearance verification based on the position of the rear axle's up and down jump limit. However, when the vehicle passes through twisted roads, potholes, stone roads, dislocated washboard roads and other working conditions, the rear axle will not only jump up and down, but also produce torsional motion. The envelope formed by simple up and down jumps is not enough to cover all working conditions, and the existing verification standards all give a unified clearance requirement value, which often results in too strict requirements and the inability to finely arrange the corresponding components, resulting in waste of resources, or insufficient consideration of the drive shaft motion envelope working conditions, resulting in interference problems, increasing the time and cost of the project team. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a method and device for determining the clearance between a transmission shaft and surrounding components, aiming to solve the problem in the prior art that when determining the clearance between a transmission shaft and surrounding components, the envelope formed by a simple up and down jump is not sufficient to include all working conditions, and the existing calibration standards all give a unified clearance requirement value, resulting in inaccurate clearance determination.

[0005] The embodiment of the present invention is implemented as follows: A method for determining the clearance between a transmission shaft and surrounding components, the method comprising: Acquire a beating curve of a rear axle of a vehicle, wherein the beating curve is used to characterize a movement range of the rear axle, generate rear axle position data of the rear axle at different positions according to the beating curve, and generate corresponding transmission shaft position data according to the rear axle position data; Acquire a rear axle posture position recorded when the vehicle passes through a preset working condition, generate a corresponding transmission shaft posture position according to the rear axle posture position, and determine a corresponding transmission shaft motion envelope according to the transmission shaft position data and the transmission shaft posture position; Divide the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule, obtain position information of components in the sub-areas, and measure the gaps between the components and the envelope of the transmission shaft respectively according to the position information; The gap is compared with the gap standard in the corresponding sub-area, the gap between the transmission shaft and the component is adjusted to meet the gap standard, and the gap between the component and the transmission shaft is determined.

[0006] Furthermore, in the above method for determining the clearance between the transmission shaft and surrounding components, the step of obtaining the beating curve of the rear axle of the vehicle comprises: The transmission shaft parameters, rear axle parameters and leaf spring parameters are obtained to determine the upper limit displacement and the lower limit displacement of the rear axle.

[0007] The displacement of the rear axle under different loads is calculated by using the principle of elastic mechanics and combining the force and deformation characteristics of the leaf spring to obtain the jumping curve.

[0008] Furthermore, in the above-mentioned method for determining the clearance between the transmission shaft and the surrounding components, the step of using the principle of elastic mechanics, combining the force and deformation characteristics of the leaf spring, and calculating the displacement of the rear axle under different loads to obtain the runout curve comprises: The different deformation amounts are calculated according to different loads to obtain the displacement of the rear axle under different loads, and the relationship curve between the displacement of the rear axle and the load is plotted to obtain the runout curve.

[0009] Further, in the above-mentioned method for determining the gap between the transmission shaft and the surrounding parts, the leaf spring parameters include the free length, width, thickness, number of layers and elastic modulus of the leaf spring, and the calculation formula of the deformation of the leaf spring is: ; Wherein, L is the free length of the leaf spring, b is the width of the leaf spring, h is the thickness of the leaf spring, n is the number of layers of the leaf spring, and E is the elastic modulus of the leaf spring.

[0010] Furthermore, in the above-mentioned method for determining the gap between the transmission shaft and surrounding components, the step of dividing the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule comprises: The length of the area through which the transmission shaft passes is obtained, and the area is equally divided according to the length, so as to divide the area into a plurality of sub-areas. Furthermore, in the above-mentioned method for determining the gap between the transmission shaft and surrounding components, the components at least include an air tank, a brake line and an exhaust pipe.

[0011] Furthermore, in the above-mentioned method for determining the gap between the transmission shaft and surrounding components, the preset road conditions at least include twisted roads, bumpy roads, stone roads, and misaligned washboard roads.

[0012] Another object of the present invention is to provide a device for determining the gap between a transmission shaft and surrounding parts, the device comprising: An acquisition module, used for acquiring a beating curve of a rear axle of a vehicle, wherein the beating curve is used for characterizing a motion range of the rear axle, generating rear axle position data of the rear axle at different positions according to the beating curve, and generating corresponding transmission shaft position data according to the rear axle position data; a determination module, configured to obtain a rear axle posture position recorded when the vehicle passes through a preset working condition, generate a corresponding transmission shaft posture position according to the rear axle posture position, and determine a corresponding transmission shaft motion envelope according to the transmission shaft position data and the transmission shaft posture position; A division module, used to divide the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule, obtain position information of components in the sub-areas, and measure the gaps between the components and the envelope of the transmission shaft respectively according to the position information; A comparison module is used to compare the gap with the gap standards in the corresponding sub-areas respectively, adjust the gap between the transmission shaft and the component to meet the gap standard, and determine the gap between the component and the transmission shaft.

[0013] Another object of the present invention is to provide a readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps of any one of the methods described above.

[0014] Another object of the present invention is to provide an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the program.

[0015] The present invention obtains a beating curve of a rear axle of a vehicle, the beating curve is used to characterize the movement range of the rear axle, generates rear axle position data of the rear axle at different positions according to the beating curve, and generates corresponding drive shaft position data according to the rear axle position data; obtains the rear axle posture position recorded when the vehicle passes through a preset working condition, generates a corresponding drive shaft posture position according to the rear axle posture position, and determines a corresponding drive shaft motion envelope according to the drive shaft position data and the drive shaft posture position; divides the area through which the drive shaft passes into multiple sub-areas according to a preset rule, obtains position information of components in the sub-areas, and measures the gaps between the components and the drive shaft envelope according to the position information; compares the gaps with the gap standards in the corresponding sub-areas, adjusts the gaps between the drive shaft and the components to meet the gap standards, and determines the gaps between the components and the drive shaft. By adding different working conditions, the motion envelope of the drive shaft is supplemented, and different positions are divided into areas and different clearance verification standards are set. It is possible to finely arrange and verify the components at different positions, and ensure a safe clearance with the drive shaft, thereby improving the accuracy of clearance determination. This solves the problem in the prior art that when determining the clearance between the drive shaft and surrounding components, the envelope formed by simple up and down jumps is not sufficient to include all working conditions, and the existing verification standards all give a unified clearance requirement value, resulting in inaccurate clearance determination. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of a vehicle at one angle in a method for determining a gap between a transmission shaft and surrounding components in one embodiment of the present invention; Figure 2 It is a cross-sectional schematic diagram of a vehicle at another angle in a method for determining a gap between a transmission shaft and surrounding components in one embodiment of the present invention; Figure 3 It is a schematic flow chart of a method for determining the clearance between a transmission shaft and surrounding components in a first embodiment of the present invention; Figure 4 A schematic diagram of area division in a method for determining a gap between a transmission shaft and surrounding components in one embodiment of the present invention; Figure 5 It is a schematic structural diagram of a device for determining a gap between a transmission shaft and surrounding components in one embodiment of the present invention.

[0017] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] See also Figure 1 to Figure 2 , which is a cross-sectional schematic diagram of a vehicle including a transmission shaft according to an embodiment of the present invention, wherein the vehicle includes a frame, a rear axle disposed on the frame and a transmission shaft connected to the rear axle, wherein: One end of the drive shaft is fixed to the frame through a supporting structure and connects the front and rear sections of the drive shaft through a front universal joint and a spline. The other end is connected to the rear axle through a rear universal joint. This end will move with the vibration of the rear axle, forming a complex dynamic envelope. There are multiple components on the frame around the drive shaft, such as the exhaust pipe, brake air pipe and air tank.

[0022] How to improve the accuracy of determining the clearance between the transmission shaft and the components will be described in detail below with reference to specific embodiments and drawings.

[0023] Embodiment 1 See also Figure 3 , shown is a method for determining the gap between a transmission shaft and surrounding components in a first embodiment of the present invention, the method comprising steps S10 to S13.

[0024] Step S10, obtaining a beating curve of the rear axle of the vehicle, wherein the beating curve is used to characterize the movement range of the rear axle, generating rear axle position data of the rear axle at different positions according to the beating curve, and generating corresponding drive shaft position data according to the rear axle position data.

[0025] The upper and lower endpoints of the curve are the upper and lower limits of the rear axle movement (the movement limit in the Z direction in the vehicle coordinates). The rear axle data at different positions are generated according to the curve, including at least the upper and lower limit positions, and several positions in between. The transmission shaft data at different positions are generated according to the rear axle data at different positions.

[0026] Specifically, the transmission shaft parameters, the rear axle parameters and the leaf spring parameters are obtained to determine the upper limit displacement and the lower limit displacement of the rear axle.

[0027] The displacement of the rear axle under different loads is calculated by using the principle of elastic mechanics and combining the force and deformation characteristics of the leaf spring to obtain the jumping curve.

[0028] Exemplarily, different deformations are calculated according to different loads to obtain the displacement of the rear axle under different loads, and a curve of the relationship between the displacement of the rear axle and the load is plotted to obtain the runout curve. Specifically, leaf spring parameters include the free length, width, thickness, number of layers and elastic modulus of the leaf spring. The calculation formula for the deformation of the leaf spring is: ; Wherein, L is the free length of the leaf spring, b is the width of the leaf spring, h is the thickness of the leaf spring, n is the number of layers of the leaf spring, and E is the elastic modulus of the leaf spring.

[0029] Step S11, obtaining the rear axle posture position recorded when the vehicle passes through a preset working condition, generating a corresponding transmission shaft posture position according to the rear axle posture position, and determining a corresponding transmission shaft motion envelope according to the transmission shaft position data and the transmission shaft posture position.

[0030] Among them, the rear axle posture position recorded when the vehicle passes through bad road conditions is obtained. The bad road conditions at least include twisted roads, bumpy roads, stone roads, dislocated washboard roads, etc. According to the recorded rear axle position, the drive shaft data is generated. This is a supplementary drive shaft motion envelope. The final drive shaft motion envelope is obtained by merging the previously acquired drive shaft position data. The drive shaft motion includes data under multiple conditions.

[0031] Step S12, dividing the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule, acquiring position information of components in the sub-areas, and measuring the gaps between the components and the envelope of the transmission shaft respectively according to the position information. Among them, according to a specific method, several different verification sub-areas are generated, such as Figure 4 As shown, three regions are set, that is, the length between the front and rear universal joints of the transmission shaft in the X direction is divided into three sections, namely, the front section (A region), the middle section (B region), and the rear section (C region).

[0032] The front end of the transmission shaft is connected to the frame, and the rear end is connected to the rear axle and moves with the rear axle. Assuming that the rear axle jump height is H, the rear end of the transmission shaft moves with the rear axle, then the distance of its movement is H. At this time, the length of the transmission shaft is L. The distance from any point on the transmission shaft to the front end of the transmission shaft is L1, L2, L3..., then the movement distance of any point on the transmission shaft is H1=H*L1 / L. That is, the closer any point is to the front end of the transmission shaft, the smaller its range of movement. If the movement of the rear axle does not conform to the theoretical design, when the envelope range is exceeded, the closer the transmission shaft is to the front end, the smaller the range of the excess. In addition, the front end is fixedly connected to the frame, and the range of movement is controllable. The rear end is connected to the rear axle, and the range of movement may be different from the theoretical design due to the influence of the rear axle. At this time, different areas are set up to finely arrange and check the components in different positions, and ensure the safe clearance with the transmission shaft.

[0033] Step S13, comparing the gap with the gap standards in the corresponding sub-areas respectively, adjusting the gap between the transmission shaft and the component to meet the gap standards, and determining the gap between the component and the transmission shaft.

[0034] Specifically, obtain the data of the parts around the transmission shaft and set them up in the vehicle position. The data includes at least the air reservoir, brake line, exhaust pipe, etc. Measure the gap between the parts in area A and the transmission shaft envelope, measure the gap between the parts in area B and the transmission shaft envelope, measure the gap between the parts in area C and the transmission shaft envelope, and compare them with the (gap) calibration standard. If it is greater than or equal to the calibration standard, the position of the part is ok. If it is less than the calibration standard, the position of the part needs to be adjusted until the calibration standard is met, so that the final gap between the part and the transmission shaft can be determined. The calibration standard here is: ≥10mm in area A, ≥15mm in area B, and ≥25mm in area C.

[0035] In summary, the method for determining the gap between the drive shaft and surrounding components in the above-mentioned embodiment of the present invention obtains the beating curve of the rear axle of the vehicle, the beating curve is used to characterize the movement range of the rear axle, and the rear axle position data of the rear axle at different positions is generated according to the beating curve, and the corresponding drive shaft position data is generated according to the rear axle position data; the rear axle posture position recorded when the vehicle passes through a preset working condition is obtained, the corresponding drive shaft posture position is generated according to the rear axle posture position, and the corresponding drive shaft motion envelope is determined according to the drive shaft position data and the drive shaft posture position; the area through which the drive shaft passes is divided into multiple sub-areas according to preset rules, the position information of the components in the sub-areas is obtained, and the gap between the components and the drive shaft envelope is measured according to the position information; the gap is compared with the gap standard in the corresponding sub-area, the gap between the drive shaft and the components is adjusted to meet the gap standard, and the gap between the components and the drive shaft is determined. By adding different working conditions, the motion envelope of the drive shaft is supplemented, and different positions are divided into areas and different clearance verification standards are set. It is possible to finely arrange and verify the components at different positions, and ensure a safe clearance with the drive shaft, thereby improving the accuracy of clearance determination. This solves the problem in the prior art that when determining the clearance between the drive shaft and surrounding components, the envelope formed by simple up and down jumps is not sufficient to include all working conditions, and the existing verification standards all give a unified clearance requirement value, resulting in inaccurate clearance determination.

[0036] Embodiment 2 See also Figure 5 , shown is a device for determining the gap between a transmission shaft and surrounding parts proposed in a second embodiment of the present invention, the device comprising: An acquisition module 100 is used to acquire a beating curve of a rear axle of a vehicle, wherein the beating curve is used to characterize a motion range of the rear axle, generate rear axle position data of the rear axle at different positions according to the beating curve, and generate corresponding transmission shaft position data according to the rear axle position data; A determination module 200 is used to obtain a rear axle posture position recorded when the vehicle passes through a preset working condition, generate a corresponding transmission shaft posture position according to the rear axle posture position, and determine a corresponding transmission shaft motion envelope according to the transmission shaft position data and the transmission shaft posture position; A division module 300 is used to divide the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule, obtain position information of components in the sub-areas, and measure the gaps between the components and the envelope of the transmission shaft according to the position information; The comparison module 400 is used to compare the gap with the gap standards in the corresponding sub-areas, adjust the gap between the transmission shaft and the component to meet the gap standard, and determine the gap between the component and the transmission shaft.

[0037] Furthermore, in the above-mentioned device for determining the gap between the transmission shaft and surrounding components, the step of obtaining the beating curve of the rear axle of the vehicle comprises: The transmission shaft parameters, rear axle parameters and leaf spring parameters are obtained to determine the upper limit displacement and the lower limit displacement of the rear axle.

[0038] The displacement of the rear axle under different loads is calculated by using the principle of elastic mechanics and combining the force and deformation characteristics of the leaf spring to obtain the jumping curve.

[0039] Furthermore, in the above-mentioned device for determining the gap between the transmission shaft and the surrounding components, the step of using the principle of elastic mechanics, combining the force and deformation characteristics of the leaf spring, and calculating the displacement of the rear axle under different loads to obtain the runout curve comprises: The different deformation amounts are calculated according to different loads to obtain the displacement of the rear axle under different loads, and the relationship curve between the displacement of the rear axle and the load is plotted to obtain the runout curve. Further, in the above-mentioned device for determining the gap between the transmission shaft and the surrounding parts, the leaf spring parameters include the free length, width, thickness, number of layers and elastic modulus of the leaf spring, and the calculation formula of the deformation of the leaf spring is: ; Wherein, L is the free length of the leaf spring, b is the width of the leaf spring, h is the thickness of the leaf spring, n is the number of layers of the leaf spring, and E is the elastic modulus of the leaf spring.

[0040] Furthermore, in the above-mentioned device for determining the gap between the transmission shaft and surrounding components, the step of dividing the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule comprises: The length of the area through which the transmission shaft passes is obtained, and the area is equally divided according to the length, so as to divide the area into a plurality of sub-areas.

[0041] Furthermore, the above-mentioned device for determining the gap between the transmission shaft and surrounding components, wherein the components at least include an air tank, a brake line and an exhaust pipe.

[0042] Furthermore, in the above-mentioned device for determining the gap between the transmission shaft and surrounding components, the preset road conditions at least include twisted roads, bumpy roads, stone roads, and dislocated washboard roads.

[0043] The functions or operation steps implemented when the above modules are executed are substantially the same as those in the above method embodiments, and will not be repeated here.

[0044] Embodiment 3 Another aspect of the present invention further provides a readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps of the method described in the first embodiment above.

[0045] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be specifically implemented in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable storage medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0047] More specific examples (a non-exhaustive list) of computer-readable storage media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0048] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for determining the gap between a transmission shaft and surrounding components, characterized in that: The method comprises: Acquire a beating curve of a rear axle of a vehicle, wherein the beating curve is used to characterize a movement range of the rear axle, generate rear axle position data of the rear axle at different positions according to the beating curve, and generate corresponding transmission shaft position data according to the rear axle position data; Acquire a rear axle posture position recorded when the vehicle passes through a preset working condition, generate a corresponding transmission shaft posture position according to the rear axle posture position, and determine a corresponding transmission shaft motion envelope according to the transmission shaft position data and the transmission shaft posture position; Divide the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule, obtain position information of components in the sub-areas, and measure the gaps between the components and the envelope of the transmission shaft respectively according to the position information; The gap is compared with the gap standard in the corresponding sub-area, the gap between the transmission shaft and the component is adjusted to meet the gap standard, and the gap between the component and the transmission shaft is determined.

2. The method for determining the gap between the transmission shaft and surrounding parts according to claim 1, characterized in that: The step of obtaining the beating curve of the rear axle of the vehicle comprises: Obtaining transmission shaft parameters, rear axle parameters and leaf spring parameters to determine upper and lower limit displacements of the rear axle; The displacement of the rear axle under different loads is calculated by using the principle of elastic mechanics and combining the force and deformation characteristics of the leaf spring to obtain the jumping curve.

3. The method for determining the gap between the transmission shaft and surrounding parts according to claim 2, characterized in that: The step of using the principle of elastic mechanics and combining the stress and deformation characteristics of the leaf spring to calculate the displacement of the rear axle under different loads to obtain the runout curve includes: The different deformation amounts are calculated according to different loads to obtain the displacement of the rear axle under different loads, and the relationship curve between the displacement of the rear axle and the load is plotted to obtain the runout curve.

4. The method for determining the gap between the transmission shaft and surrounding parts according to claim 3, characterized in that: The leaf spring parameters include the free length, width, thickness, number of layers and elastic modulus of the leaf spring. The calculation formula of the deformation of the leaf spring is: Wherein, L is the free length of the leaf spring, b is the width of the leaf spring, h is the thickness of the leaf spring, n is the number of layers of the leaf spring, and E is the elastic modulus of the leaf spring.

5. The method for determining the gap between a transmission shaft and surrounding components according to claim 1, characterized in that: The step of dividing the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule comprises: The length of the area through which the transmission shaft passes is obtained, and the area is equally divided according to the length, so as to divide the area into a plurality of sub-areas.

6. The method for determining the gap between the transmission shaft and surrounding parts according to claim 2, characterized in that: The components at least include an air reservoir, a brake pipeline and an exhaust pipe.

7. The method for determining the gap between a transmission shaft and surrounding components according to any one of claims 1 to 6, characterized in that: The preset road conditions at least include twisted roads, pothole roads, stone roads, and dislocated washboard roads.

8. A device for determining the gap between a transmission shaft and surrounding parts, characterized in that: The device comprises: An acquisition module, used for acquiring a beating curve of a rear axle of a vehicle, wherein the beating curve is used for characterizing a motion range of the rear axle, generating rear axle position data of the rear axle at different positions according to the beating curve, and generating corresponding transmission shaft position data according to the rear axle position data; a determination module, configured to obtain a rear axle posture position recorded when the vehicle passes through a preset working condition, generate a corresponding transmission shaft posture position according to the rear axle posture position, and determine a corresponding transmission shaft motion envelope according to the transmission shaft position data and the transmission shaft posture position; A division module, used to divide the area through which the transmission shaft passes into a plurality of sub-areas according to a preset rule, obtain position information of components in the sub-areas, and measure the gaps between the components and the envelope of the transmission shaft respectively according to the position information; A comparison module is used to compare the gap with the gap standards in the corresponding sub-areas respectively, adjust the gap between the transmission shaft and the component to meet the gap standard, and determine the gap between the component and the transmission shaft.

9. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method according to any one of claims 1 to 7 are implemented.

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