Automobile drive shaft arrangement method, drive shaft and vehicle

Abstract

The application relates to a car transmission shaft arrangement method, which comprises the following steps: setting a first universal joint center point of a transmission shaft according to the position of a power take-off of a car and the matching relationship between the power take-off and the transmission shaft; setting a fourth universal joint center point of the transmission shaft according to the position of a main reducer of the car and the matching relationship between the main reducer and the transmission shaft; and determining the second and third universal joint center points according to the first and fourth universal joint center points. Compared with the prior art, the car transmission shaft arrangement method provided by the application meets the structural and performance requirements, has strong logic and high practicability, and has wide engineering application.

Description

Technical Field

[0001] This application relates to the automotive field, and more specifically, to a method for arranging an automotive driveshaft, a driveshaft, and a vehicle. Background Technology

[0002] Currently, there are three main methods for arranging driveshafts: 1. Parametric arrangement method for driveshaft angles: This method constructs a parametric model of the transmission system. By inputting initialization parameter variables and key arrangement parameters into the parametric modeling environment, the absolute angle and length of the driveshaft can be calculated quickly and effectively. However, this method does not consider the limitations of the surrounding structure and lacks a systematic approach to driveshaft arrangement, thus having certain limitations. 2. Driveshaft arrangement verification method: This method simplifies the complex transmission system into points and lines, facilitating the verification of various angles of the driveshaft in CATIA software, effectively improving verification efficiency. However, this method is based on the verification of the rear solid axle's vertical jump condition, which is not suitable for vehicles with rear independent suspension and is rarely used in passenger cars. Furthermore, this method only describes the verification method and does not provide an overall explanation of the driveshaft arrangement method. 3. Driveshaft angle optimization method: This method uses the minimum equivalent residual angle of the driveshaft universal joint as the objective function and iteratively optimizes to find the optimal solution. However, this optimization method does not consider the structural design of the driveshaft and the arrangement of surrounding schemes; it is only a theoretical optimization method and has limited engineering applications. Summary of the Invention

[0003] To address the aforementioned technical problems, this application is proposed. This application provides a method for arranging an automotive driveshaft, comprising:

[0004] Based on the position of the vehicle's power take-off unit and the fit between the power take-off unit and the drive shaft, set the center point of the first universal joint of the drive shaft.

[0005] Based on the position of the vehicle's main reducer and the fit between the main reducer and the drive shaft, the center point of the 4th universal joint of the drive shaft is set.

[0006] When the distance between the center point of the first universal joint of the drive shaft and the center point of the fourth universal joint of the drive shaft is equal to the initial total length of the drive shaft, the initial lengths of the front drive shaft, the middle drive shaft, and the rear drive shaft are allocated according to the initial total length of the drive shaft.

[0007] Based on the modal separation requirements of the front drive shaft, the middle drive shaft, and the rear drive shaft, the actual lengths of the front drive shaft, the middle drive shaft, and the rear drive shaft are obtained.

[0008] Based on the center point of the first universal joint of the drive shaft, the first angle requirement, and the actual length of the front drive shaft, obtain the set of center points of the second universal joint;

[0009] Based on the center point of the fourth universal joint of the drive shaft, the second angle requirement, and the actual length of the rear drive shaft, obtain the set of center points of the third universal joint;

[0010] Based on the set of center points of the second universal joint, the set of center points of the third universal joint, the third angle requirement, the fourth angle requirement, and the actual length of the middle drive shaft, check the clearance of the peripheral components;

[0011] Based on the operating motion of the powertrain, the first maximum displacement point of the center point of the first universal joint of the drive shaft is obtained;

[0012] When the center point of the first universal joint of the drive shaft is located at the first maximum displacement point, check whether the dynamic limit angle of the first universal joint of the drive shaft and the dynamic limit angle of the second universal joint of the drive shaft meet the dynamic maximum limit angle requirement, and check whether the dynamic limit length of the front drive shaft meets the dynamic maximum limit angle requirement.

[0013] Based on the operating motion of the main reducer, obtain the second maximum displacement point of the center point of the fourth universal joint of the drive shaft;

[0014] When the center point of the fourth universal joint of the drive shaft is located at the second maximum displacement point, check whether the dynamic limit angle of the third universal joint and the dynamic limit angle of the fourth universal joint of the drive shaft meet the dynamic maximum limit angle requirement, and check whether the dynamic limit length of the subsequent drive shaft meets the dynamic maximum limit angle requirement.

[0015] Alternatively, the method of arranging the automotive driveshaft also includes:

[0016] Optimize the initial length;

[0017] Optimizing the initial length includes: calculating the initial length of the front drive shaft, the middle drive shaft, and the rear drive shaft when the difference in modes within 2000Hz is greater than or equal to 50Hz.

[0018] Optionally, the set of center points of the second universal joint is obtained based on the center point of the first universal joint of the drive shaft, the first angle requirement, and the actual length of the front drive shaft, including:

[0019] A first circle is drawn with the center point of the first universal joint of the drive shaft as the center and the length of the front drive shaft as the radius.

[0020] Starting from the center point of the first universal joint of the drive shaft, two rays are drawn according to the static allowable angle requirement of the first universal joint of the drive shaft;

[0021] The arc between the intersections of the two rays and the first circle is the set of the center points of the second gimbal.

[0022] Optionally, the set of center points of the third universal joint is obtained based on the center point of the fourth universal joint of the drive shaft, the second angle requirement, and the actual length of the rear drive shaft, including:

[0023] A second circle is drawn with the center point of the fourth universal joint of the drive shaft as the center and the length of the rear drive shaft as the radius.

[0024] Starting from the center point of the fourth universal joint of the drive shaft, two rays are drawn according to the static allowable angle requirement of the fourth universal joint of the drive shaft;

[0025] The arc between the intersections of the two rays and the second circle is the set of the center points of the third gimbal.

[0026] Alternatively, the method of arranging the automotive driveshaft also includes:

[0027] The set of the center points of the second universal joint of the drive shaft and the center points of the second universal joint;

[0028] By matching the center point of the third universal joint of the drive shaft with the set of the center points of the third universal joint, the angles of the second and third universal joints of the drive shaft are guaranteed to meet the static allowable angle requirements.

[0029] Optionally, checking the clearance of peripheral components includes:

[0030] The clearance between the front drive shaft, the middle drive shaft, and the rear drive shaft and the vehicle's central tunnel is verified to be greater than or equal to 15mm, and the clearance between the front drive shaft, the middle drive shaft, and the rear drive shaft and the exhaust pipe is verified to be greater than or equal to 25mm.

[0031] Optionally, when the center point of the first universal joint of the drive shaft is located at the first maximum displacement point, verifying whether the dynamic limit angle of the first universal joint of the drive shaft and the dynamic limit angle of the second universal joint of the drive shaft meet the dynamic maximum limit angle requirement, and verifying whether the dynamic limit length of the front drive shaft meets the dynamic maximum limit angle requirement includes:

[0032] Obtain the limit motion position of the power take-off unit under operating conditions;

[0033] Connect the extreme motion position of the center point of the first universal joint to the center point of the second universal joint;

[0034] Obtain the dynamic limit angles of the first and second universal joints;

[0035] Measure the dynamic limit length of the front drive shaft.

[0036] Optionally, when the center point of the fourth universal joint of the drive shaft is located at the second maximum displacement point, verifying whether the dynamic limit angles of the third and fourth universal joints of the drive shaft meet the dynamic maximum limit angle requirement, and verifying whether the dynamic limit length of the subsequent drive shaft meets the dynamic maximum limit angle requirement includes:

[0037] Obtain the limit motion position of the main reducer under operating conditions;

[0038] The extreme movement positions connecting the center point of the 3rd universal joint and the center point of the 4th universal joint;

[0039] Obtain the dynamic limit angles of the 3rd and 4th universal joints;

[0040] Measure the dynamic limit length of the rear drive shaft.

[0041] According to another aspect of this application, an automotive driveshaft is also provided, which is arranged using the method described in any of the foregoing embodiments.

[0042] According to another aspect of this application, an automobile is also provided, including the aforementioned automobile driveshaft.

[0043] Compared with the prior art, the automotive drive shaft arrangement method provided in this application not only meets both structural and performance requirements, but also has strong logic, strong practicality, and wide engineering application. Attached Figure Description

[0044] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objectives, and beneficial effects of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0045] Figure 1 The diagram shown is of a three-section drive shaft;

[0046] Figure 2 The diagram shown is of the power take-off unit and the front drive shaft.

[0047] Figure 3 The diagram shown is of the main reducer and the rear drive shaft.

[0048] Figure 4 The diagram shows the circular arc representing the center point of the second universal joint.

[0049] Figure 5 The diagram shows the circular arc representing the center point of the 3rd universal joint.

[0050] Figure 6 The diagram shows the angles of the 2nd and 3rd universal joints;

[0051] Figure 7 The diagram shown is a schematic of the drive shaft and the central channel;

[0052] Figure 8 The diagram shown is of the drive shaft and exhaust system.

[0053] Figure 9 The diagram shows the dynamic limit angles and lengths of the first and second universal joints.

[0054] Figure 10 The diagram shows the dynamic limit angles and lengths of the 3rd and 4th universal joints.

[0055] Figure 11 This is a block diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0056] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0057] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0059] Please refer to Figure 1 In this embodiment, the three-section driveshaft structure consists of a front driveshaft b, a middle driveshaft c, and a rear driveshaft d. The front end is connected to the power take-off a, and the rear end is connected to the main reducer e. The three-section driveshaft has a total of four universal joint centers, namely the first universal joint center A, the second universal joint center B, the third universal joint center C, and the fourth universal joint center D.

[0060] In one embodiment of this application, the method for arranging an automobile driveshaft includes:

[0061] like Figure 2 As shown, based on the position of the vehicle's power take-off (PTO) a and the cooperation relationship between PTO a and the front drive shaft b, the center point A of the first universal joint of the drive shaft is set.

[0062] like Figure 3 As shown, based on the position of the main reducer e and the fit between the main reducer e and the rear drive shaft d, the center point D of the fourth universal joint of the drive shaft is set.

[0063] When the distance between the center point of the first universal joint of the drive shaft and the center point of the fourth universal joint of the drive shaft is equal to the initial total length of the drive shaft, the initial lengths of the front drive shaft, the middle drive shaft, and the rear drive shaft are allocated according to the initial total length of the drive shaft.

[0064] like Figure 1 As shown, the distance between the center point A of the first universal joint of the drive shaft and the center point D of the fourth universal joint of the drive shaft is set as the initial total length AD of the drive shaft.

[0065] Based on the modal separation requirements of the front drive shaft, the middle drive shaft, and the rear drive shaft, the actual lengths of the front drive shaft, the middle drive shaft, and the rear drive shaft are obtained.

[0066] like Figure 1 As shown, the lengths of each segment of the drive shaft (b, c, d) are allocated and optimized based on the initial total length AD of the drive shaft. It is required that the difference between the modes of each segment of the drive shaft (b, c, d) is greater than 50Hz within 2000Hz. The lengths of each segment of the drive shaft (AB, BC, CD) that meet the mode separation requirements are calculated.

[0067] Based on the center point of the first universal joint of the drive shaft, the first angle requirement, and the actual length of the front drive shaft, obtain the set of center points of the second universal joint;

[0068] like Figure 4 As shown, with the center point A of the first universal joint of the drive shaft as the center and the length AB of the front drive shaft b as the radius, draw a circle. With the center point A of the first universal joint of the drive shaft as the starting point, draw two rays with the static allowable angle requirement θ1 of the first universal joint of the drive shaft. Draw the intersection points E and F of the two rays with the circle. The arc EF is the set of the center points B of the second universal joint.

[0069] Based on the center point of the fourth universal joint of the drive shaft, the second angle requirement, and the actual length of the rear drive shaft, obtain the set of center points of the third universal joint;

[0070] like Figure 5As shown, draw a circle with the center point D of the 4th universal joint of the drive shaft as the center and the length CD of the subsequent drive shaft d as the radius. With the center point D of the 4th universal joint of the drive shaft as the starting point, draw two rays with the static allowable angle requirement θ4 of the 4th universal joint of the drive shaft. Draw the intersection points M and N of the two rays with the circle. The arc MN is the set of the center points C of the 3rd universal joint.

[0071] like Figure 6 As shown, based on the length BC of the middle section of the drive shaft c, the set EF of the center B of the second universal joint of the drive shaft and the center point B of the second universal joint are matched, and the set MN of the center C of the third universal joint of the drive shaft and the center point C of the third universal joint is matched, so as to ensure that the angles θ2 and θ3 of the second and third universal joints of the drive shaft meet the static allowable angle requirements.

[0072] Based on the set of center points of the second universal joint, the set of center points of the third universal joint, the third angle requirement, the fourth angle requirement, and the actual length of the middle drive shaft, check the clearance of the peripheral components;

[0073] like Figure 7 As shown, check the gaps between peripheral components, requiring a gap of ≥15mm between the peripheral components such as the central channel.

[0074] like Figure 8 As shown, check the clearance of peripheral components. The clearance with heat-prone components such as exhaust should be ≥25mm. This completes the initial setting of the center points B and C of the 2nd and 3rd universal joints of the drive shaft.

[0075] Based on the operating motion of the powertrain, the first maximum displacement point of the center point of the first universal joint of the drive shaft is obtained;

[0076] When the center point of the first universal joint of the drive shaft is located at the first maximum displacement point, check whether the dynamic limit angle of the first universal joint of the drive shaft and the dynamic limit angle of the second universal joint of the drive shaft meet the dynamic maximum limit angle requirement, and check whether the dynamic limit length of the front drive shaft meets the dynamic maximum limit angle requirement.

[0077] like Figure 9 As shown, the limit motion position a of the power take-off unit under working condition 28 is plotted. max The extreme motion position A of the center A of the first universal joint max Plot the dynamic limit angles θ of the first and second gimbals, using the center point B of the second gimbal. 1max θ 2max The dynamic limit length A of the front drive shaft b was measured. maxB .

[0078] Based on the operating motion of the main reducer, obtain the second maximum displacement point of the center point of the fourth universal joint of the drive shaft;

[0079] When the center point of the fourth universal joint of the drive shaft is located at the second maximum displacement point, check whether the dynamic limit angle of the third universal joint and the dynamic limit angle of the fourth universal joint of the drive shaft meet the dynamic maximum limit angle requirement, and check whether the dynamic limit length of the subsequent drive shaft meets the dynamic maximum limit angle requirement.

[0080] like Figure 10 As shown, the limit motion position e of the main reducer under operating condition 28 is plotted. max The extreme motion position D connecting the center point C of the 3rd gimbal and the center A of the 4th gimbal. max Plot the dynamic limit angles θ of the 3rd and 4th gimbals. 3max θ 4max The dynamic limit length CD of the rear drive shaft d was measured. max .

[0081] Check whether the angles of the 1st, 2nd, 3rd, and 4th universal joints of the drive shaft and the lengths of the front and rear drive shafts meet the dynamic maximum limit angles and lengths.

[0082] If this cannot be achieved, adjust the angle of the middle drive shaft.

[0083] If the synchronous optimization of the power take-off and main reducer angles still cannot be achieved, continue until the requirements are met.

[0084] Compared with the prior art, the automotive drive shaft arrangement method provided in this application not only meets both structural and performance requirements, but also has strong logic, strong practicality, and wide engineering application.

[0085] Figure 11 A block diagram of an electronic device according to an embodiment of this application is illustrated.

[0086] like Figure 11 As shown, the electronic device 10 includes one or more processors 11 and memory 12.

[0087] The processor 11 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0088] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may execute the program instructions to implement the functions and / or other desired functions in the automotive driveshaft arrangement methods of the various embodiments of this application described above. Various contents, such as target position feature vectors, may also be stored in the computer-readable storage medium.

[0089] In one example, the electronic device 10 may also include an input device 13 and an output device 14, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0090] The input device 13 may include, for example, a keyboard, a mouse, etc.

[0091] The output device 14 can output various information to the outside, including decoded values. The output device 14 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0092] Of course, for the sake of simplicity, Figure 11 Only some of the components of the electronic device 10 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 10 may include any other suitable components depending on the specific application.

[0093] Exemplary computer program products and computer-readable storage media

[0094] In addition to the methods and devices described above, embodiments of this application may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps of the functions in the automotive driveshaft arrangement methods according to various embodiments of this application described in the "Exemplary Methods" section of this specification.

[0095] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0096] Furthermore, embodiments of this application may also be computer-readable storage media storing computer program instructions that, when executed by a processor, cause the processor to perform the steps of the automotive driveshaft arrangement method according to various embodiments of this application described in the "Exemplary Methods" section above.

[0097] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0098] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0099] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0100] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0101] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0102] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for arranging automotive driveshafts, characterized in that, include: Based on the position of the vehicle's power take-off unit and the fit between the power take-off unit and the drive shaft, set the center point of the first universal joint of the drive shaft. Based on the position of the vehicle's main reducer and the fit between the main reducer and the drive shaft, the center point of the 4th universal joint of the drive shaft is set. When the distance between the center point of the first universal joint of the drive shaft and the center point of the fourth universal joint of the drive shaft is equal to the initial total length of the drive shaft, the initial lengths of the front drive shaft, the middle drive shaft, and the rear drive shaft are allocated according to the initial total length of the drive shaft. Based on the modal separation requirements of the front drive shaft, the middle drive shaft, and the rear drive shaft, the actual lengths of the front drive shaft, the middle drive shaft, and the rear drive shaft are obtained. Based on the center point of the first universal joint of the drive shaft, the first angle requirement, and the actual length of the front drive shaft, obtain the set of center points of the second universal joint; Based on the center point of the fourth universal joint of the drive shaft, the second angle requirement, and the actual length of the rear drive shaft, obtain the set of center points of the third universal joint; Based on the set of center points of the second universal joint, the set of center points of the third universal joint, the third angle requirement, the fourth angle requirement, and the actual length of the middle drive shaft, check the clearance of the peripheral components; Based on the operating motion of the powertrain, the first maximum displacement point of the center point of the first universal joint of the drive shaft is obtained; When the center point of the first universal joint of the drive shaft is located at the first maximum displacement point, check whether the dynamic limit angle of the first universal joint of the drive shaft and the dynamic limit angle of the second universal joint of the drive shaft meet the dynamic maximum limit angle requirement, and check whether the dynamic limit length of the front drive shaft meets the dynamic maximum limit angle requirement. Based on the operating motion of the main reducer, obtain the second maximum displacement point of the center point of the fourth universal joint of the drive shaft; When the center point of the fourth universal joint of the drive shaft is located at the second maximum displacement point, check whether the dynamic limit angle of the third universal joint and the dynamic limit angle of the fourth universal joint of the drive shaft meet the dynamic maximum limit angle requirement, and check whether the dynamic limit length of the subsequent drive shaft meets the dynamic maximum limit angle requirement.

2. The method for arranging automotive drive shafts according to claim 1, characterized in that, Other methods for arranging automotive driveshafts include: Optimize the initial length; Optimizing the initial length includes: calculating the initial length of the front drive shaft, the middle drive shaft, and the rear drive shaft when the difference in modes within 2000Hz is greater than or equal to 50Hz.

3. The method for arranging automotive drive shafts according to claim 1, characterized in that, Based on the center point of the first universal joint of the drive shaft, the first angle requirement, and the actual length of the front drive shaft, the set of center points of the second universal joint is obtained, including: A first circle is drawn with the center point of the first universal joint of the drive shaft as the center and the length of the front drive shaft as the radius. Starting from the center point of the first universal joint of the drive shaft, two rays are drawn according to the static allowable angle requirement of the first universal joint of the drive shaft; The arc between the intersections of the two rays and the first circle is the set of the center points of the second gimbal.

4. The method for arranging automotive drive shafts according to claim 3, characterized in that, Based on the center point of the fourth universal joint of the drive shaft, the second angle requirement, and the actual length of the rear drive shaft, the set of center points of the third universal joint is obtained as follows: A second circle is drawn with the center point of the fourth universal joint of the drive shaft as the center and the length of the rear drive shaft as the radius. Starting from the center point of the fourth universal joint of the drive shaft, two rays are drawn according to the static allowable angle requirement of the fourth universal joint of the drive shaft; The arc between the intersections of the two rays and the second circle is the set of the center points of the third gimbal.

5. The method for arranging automotive drive shafts according to claim 4, characterized in that, Other methods for arranging automotive driveshafts include: The set of the center points of the second universal joint of the drive shaft and the center points of the second universal joint; By matching the center point of the third universal joint of the drive shaft with the set of the center points of the third universal joint, the angles of the second and third universal joints of the drive shaft are guaranteed to meet the static allowable angle requirements.

6. The method for arranging automotive drive shafts according to claim 1, characterized in that, The clearance of peripheral components during verification includes: The clearance between the front drive shaft, the middle drive shaft, and the rear drive shaft and the vehicle's central tunnel is verified to be greater than or equal to 15mm, and the clearance between the front drive shaft, the middle drive shaft, and the rear drive shaft and the exhaust pipe is verified to be greater than or equal to 25mm.

7. The method for arranging automotive drive shafts according to claim 1, characterized in that, When the center point of the first universal joint of the drive shaft is located at the first maximum displacement point, verify whether the dynamic limit angle of the first universal joint and the dynamic limit angle of the second universal joint of the drive shaft meet the dynamic maximum limit angle requirement. Verify whether the dynamic limit length of the front drive shaft meets the dynamic maximum limit angle requirement, including: Obtain the limit motion position of the power take-off unit under operating conditions; Connect the extreme motion position of the center point of the first universal joint to the center point of the second universal joint; Obtain the dynamic limit angles of the first and second universal joints; Measure the dynamic limit length of the front drive shaft.

8. The method for arranging automotive drive shafts according to claim 1, characterized in that, When the center point of the fourth universal joint of the drive shaft is located at the second maximum displacement point, verify whether the dynamic limit angles of the third and fourth universal joints of the drive shaft meet the dynamic maximum limit angle requirement. Verify whether the dynamic limit length of the subsequent drive shaft meets the dynamic maximum limit angle requirement, including: Obtain the limit motion position of the main reducer under operating conditions; The extreme movement positions connecting the center point of the 3rd universal joint and the center point of the 4th universal joint; Obtain the dynamic limit angles of the 3rd and 4th universal joints; Measure the dynamic limit length of the rear drive shaft.

9. An automotive driveshaft, characterized in that, Arranged using the method described in any one of claims 1-8.

10. A car, characterized in that, Includes the automotive drive shaft as described in claim 9.

Images