Layout verification method, system and equipment for power transmission system based on CATIA

Abstract

The present invention provides a layout verification method, system and equipment for a power transmission system based on CATIA, the method comprising: taking point B as an endpoint, connecting point A and point B as a reference line AB and rotating to form a conical surface E with a cone angle of 2θ; judging whether the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are enclosed within the conical surface E; if not, connecting the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state with point B to generate a corresponding limit center line, and obtaining the angle between each limit center line and the reference line AB, and determining it as the target angle of the driving half shaft. The present invention adopts a layout design verification method based on CATIA modeling, which can quickly arrange the design and accurately analyze whether the layout structure of the driving half shaft is reasonable.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicles, and in particular to a layout verification method, system and equipment for a power transmission system based on CATIA. Background Art

[0002] For pure electric vehicles, the powertrain and drive half shaft are important components of the power transmission system. The powertrain is arranged between the left and right longitudinal beams of the cabin, and the drive half shaft is located between the reducer and the drive wheels and provides power to the left and right drive wheels. Under normal circumstances, if the power transmission system is arranged unreasonably, it may cause problems such as abnormal power transmission noise, starting jitter, and high-speed noise.

[0003] In the layout design of the power transmission system, the layout angle between the inner and outer sides of the drive half-shaft should generally be made as small as possible. However, there are many boundary conditions that affect the angle of the drive half-shaft, so that in actual situations, it is difficult to obtain a reasonable layout angle. Either the layout angle is too large, which wastes the layout space, or the layout angle is too small, which causes transmission abnormalities. Summary of the invention

[0004] The purpose of the present invention is to propose a layout verification method, system and equipment for a power transmission system based on CATIA, so as to solve the problem that it is difficult to obtain a reasonable layout angle in the current stage, either wasting layout space due to a too large layout angle, or causing transmission abnormality due to a too small layout angle.

[0005] The present invention proposes a layout verification method of a power transmission system based on CATIA, the method comprising:

[0006] Obtaining a CATIA three-dimensional model of the power transmission system, wherein the power transmission system includes a power assembly and a drive half shaft, wherein the drive half shaft includes an inner moving section of the drive half shaft, an outer fixed section of the drive half shaft and a connecting shaft, and a drive wheel is mounted on the drive half shaft;

[0007] Extracting the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the inner moving joint of the driving half shaft and the end of the connecting shaft away from the point A, wherein the point A coincides with the center point of the output port of the powertrain;

[0008] With the point B as the endpoint, connecting the point A and the point B as the reference line AB and rotating to form a conical surface E with a cone angle of 2θ, wherein θ is the critical swing angle when the driving half shaft is in the reference position;

[0009] Respectively extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judge whether the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are surrounded by the conical surface E;

[0010] If not, then connect the hinge center point of the outer fixed joint of the driving half-shaft and the connecting shaft at each extreme state and the center point of the driving wheel at each extreme state with point B to generate the corresponding extreme center line, and obtain the angle between each extreme center line and the baseline AB, and set the maximum angle with the baseline AB as the target angle of the driving half-shaft.

[0011] The layout verification method of the power transmission system based on CATIA proposed by the present invention has the following features:

[0012] Beneficial effects:

[0013] The present invention is modeled based on CATIA, extracts the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the end of the inner moving joint of the driving half shaft and the connecting shaft away from the point A; takes the point B as the endpoint, connects the point A and the point B as the reference line AB and rotates to form a conical surface E with a cone angle of 2θ, wherein θ is the critical swing angle when the driving half shaft is in the reference position; respectively extracts the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft in each limit state and the position points of the center point of the driving wheel in each limit state under each working condition of the whole vehicle. , and judge whether the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state are surrounded by the conical surface E; if not, the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state are connected with the point B to generate the corresponding limit center line, and the angle between each limit center line and the reference line AB is obtained, and the maximum angle with the reference line AB is defined as the target angle of the driving half shaft. The present invention adopts the layout design verification method of CATIA modeling, which can quickly layout and design and accurately analyze whether the layout structure of the driving half shaft is reasonable, improve the structural design efficiency of the transmission shaft, reduce the waste of man-hours caused by repeated engineering schemes, and based on the limit states of the driving half shaft and the driving wheel under various working conditions of the whole vehicle, it can improve the comprehensiveness and accuracy of the analysis, and while obtaining the smallest possible layout angle of the driving half shaft, the rationality of the layout angle of the driving half shaft is guaranteed to the greatest extent possible.

[0014] In addition, the layout verification method of the power transmission system based on CATIA provided by the present invention may also have the following additional technical features:

[0015] Furthermore, after the step of respectively extracting the position points of the hinge center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judging whether the position points of the hinge center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are surrounded by the conical surface E, it also includes:

[0016] If so, the critical swing angle θ when the driving half shaft is in the reference position is determined as the target angle of the driving half shaft, and the conical surface E is used as the layout boundary surface of the driving half shaft.

[0017] Furthermore, the working condition includes a straight-line driving condition and a turning driving condition, and the step of respectively extracting the position points of the hinge center point between the outer fixed joint of the driving half shaft and the connecting shaft in each extreme state under each working condition of the whole vehicle includes:

[0018] Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the upper jump limit, full load, half load, no load and lower jump limit states respectively under the straight-line driving condition of the whole vehicle;

[0019] Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the left turning driving condition of the whole vehicle respectively when the upper jump is 100% and turns 10° to the left, the upper jump is 80% and turns to the left, and the lower jump is 100% and turns 10° to the right;

[0020] The position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the right turning condition of the whole vehicle are extracted respectively when the upper jump is 100% and turns right 10°, the upper jump is 80% and turns right fully, and the lower jump is 100% and turns right 10°.

[0021] Furthermore, after the step of respectively extracting the position points of the center points of the driving wheels in each extreme state under each working condition of the whole vehicle, the step further includes:

[0022] Extract the position points of the center point of the driving wheel under the condition of the vehicle running straight, under the upper jump limit, full load, half load, no load and lower jump limit;

[0023] Extract the position points of the center point of the driving wheel when the vehicle turns left with the upper jump of 100% and turns left by 10°, the upper jump of 80% and turns left by 100%, and the lower jump of 100% and turns right by 10° respectively;

[0024] The position points of the center point of the driving wheel when the vehicle turns right with an upward jump of 100% and turns right by 10°, when the vehicle jumps up by 80% and turns right by 10°, and when the vehicle jumps down by 100% and turns right by 10° are respectively extracted.

[0025] Furthermore, before the step of extracting the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the end of the inner moving joint of the driving half shaft and the connecting shaft away from the point A, the step also includes:

[0026] The contour surface of the power assembly is offset according to a preset offset rule to generate a layout boundary surface of the power assembly.

[0027] Further, the step of offsetting the contour surface of the power assembly according to a preset offset rule to generate a layout boundary surface of the power assembly includes:

[0028] The contour surface of the power assembly is obtained, and the contour surface of the power assembly is offset according to the xyz direction offset distance of (a+a1, b+b1, c+c1) to obtain the layout boundary surface of the power assembly, wherein a is the limit displacement of the power assembly in the x direction, a1 is the reserved displacement of the power assembly in the x direction, b is the limit displacement of the power assembly in the y direction, b1 is the reserved displacement of the power assembly in the y direction, cb is the limit displacement of the power assembly in the z direction, and c1 is the reserved displacement of the power assembly in the z direction.

[0029] Furthermore, before the step of taking point B as an endpoint, connecting point A and point B as a reference line AB and rotating to form a conical surface E with a cone angle of 2θ, the step further includes:

[0030] The maximum rotation speed of the driving half shaft is obtained, and the critical swing angle θ when the driving half shaft is in the reference position is calculated according to the maximum rotation speed of the driving half shaft. The calculation formula is:

[0031]

[0032] Wherein, θ is the critical swing angle when the driving half shaft is in the reference position, and n is the maximum rotational speed of the driving half shaft.

[0033] The present invention also proposes a layout verification system for a power transmission system based on CATIA, comprising:

[0034] An acquisition module is used to acquire a CATIA three-dimensional model of the power transmission system, wherein the power transmission system includes a power assembly and a drive half shaft, wherein the drive half shaft includes an inner moving section of the drive half shaft, an outer fixed section of the drive half shaft, and a connecting shaft;

[0035] Extraction module: used to extract the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the inner moving joint of the driving half shaft and the end of the connecting shaft away from the point A, wherein the point A coincides with the center point of the output port of the powertrain;

[0036] Manufacturing module: used to connect the point A and the point B as the reference line AB with the point B as the endpoint and rotate to form a conical surface E with a cone angle of 2θ, wherein θ is the critical swing angle when the driving half shaft is in the reference position;

[0037] A judgment module: used to respectively extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judge whether the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are surrounded by the conical surface E;

[0038] Determination module: if not, then connect the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state with point B to generate the corresponding limit center line, and obtain the angle between each limit center line and the baseline AB, and set the maximum angle with the baseline AB as the target angle of the driving half shaft.

[0039] The present invention further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned layout verification method of the power transmission system based on CATIA is implemented.

[0040] The present invention also proposes a layout verification device for a power transmission system based on CATIA, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned layout verification method for a power transmission system based on CATIA when executing the program.

[0041] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0043] Figure 1 It is a flow chart of a method for checking the arrangement of a power transmission system based on CATIA according to a first embodiment of the present invention;

[0044] Figure 2 A system block diagram of a layout verification system for a power transmission system based on CATIA according to a second embodiment of the present invention;

[0045] Figure 3 It is a schematic structural diagram of a layout verification device of a power transmission system based on CATIA according to the third embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Several embodiments of the present invention are shown in the accompanying 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.

[0047] Example 1

[0048] like Figure 1 As shown, an embodiment of the present invention provides a layout verification method of a power transmission system based on CATIA, including steps S101 to S105.

[0049] S101, obtaining a CATIA three-dimensional model of the power transmission system, wherein the power transmission system includes a powertrain and a drive half-shaft, wherein the drive half-shaft includes an inner movable joint of the drive half-shaft, an outer fixed joint of the drive half-shaft and a connecting shaft, and a drive wheel is mounted on the drive half-shaft.

[0050] S102, extracting the assembly point A of the inner movable joint of the driving half shaft and the hinge center point B of the end of the inner movable joint of the driving half shaft and the connecting shaft away from the point A, wherein the point A coincides with the center point of the output port of the powertrain.

[0051] Among them, the power assembly is arranged between the left and right longitudinal beams of the cabin, the drive half shaft is located between the power assembly and the drive wheel and provides power for the left and right drive wheels, the assembly point is point A, and the other end is relatively slidably connected with the connecting shaft. When the connecting shaft slides to one end away from the power assembly, the hinge center point with the inner moving joint of the drive half shaft is point B.

[0052] Before the step of extracting the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the end of the inner moving joint of the driving half shaft and the connecting shaft away from the point A, the step further includes:

[0053] The contour surface of the power assembly is offset according to a preset offset rule to generate a layout boundary surface of the power assembly.

[0054] Further, the step of offsetting the contour surface of the power assembly according to a preset offset rule to generate a layout boundary surface of the power assembly includes:

[0055] The contour surface of the power assembly is obtained, and the contour surface of the power assembly is offset according to the xyz direction offset distance of (a+a1, b+b1, c+c1) to obtain the layout boundary surface of the power assembly, wherein a is the limit displacement of the power assembly in the x direction, a1 is the reserved displacement of the power assembly in the x direction, b is the limit displacement of the power assembly in the y direction, b1 is the reserved displacement of the power assembly in the y direction, cb is the limit displacement of the power assembly in the z direction, and c1 is the reserved displacement of the power assembly in the z direction.

[0056] S103, taking the point B as an endpoint, connecting the point A and the point B as a reference line AB and rotating to form a conical surface E with a cone angle of 2θ, wherein θ is a critical swing angle when the driving half shaft is in a reference position.

[0057] Furthermore, before the step of taking point B as an endpoint, connecting point A and point B as a reference line AB and rotating to form a conical surface E with a cone angle of 2θ, the step further includes:

[0058] The maximum rotation speed of the driving half shaft is obtained, and the critical swing angle θ when the driving half shaft is in the reference position is calculated according to the maximum rotation speed of the driving half shaft. The calculation formula is:

[0059]

[0060] Wherein, θ is the critical swing angle when the driving half shaft is in the reference position, and n is the maximum rotational speed of the driving half shaft.

[0061] S104, respectively extracting the position points of the articulation center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and determining whether the position points of the articulation center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are enclosed within the conical surface E.

[0062] The working conditions include straight-line driving conditions and turning driving conditions, and the steps of respectively extracting the position points of the hinge center points of the outer fixed joint of the driving half shaft and the connecting shaft in each extreme state under each working condition of the whole vehicle include:

[0063] Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the upper jump limit, full load, half load, no load and lower jump limit states respectively under the straight-line driving condition of the whole vehicle;

[0064] Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the left turning driving condition of the whole vehicle respectively when the upper jump is 100% and turns 10° to the left, the upper jump is 80% and turns to the left, and the lower jump is 100% and turns 10° to the right;

[0065] The position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the right turning condition of the whole vehicle are extracted respectively when the upper jump is 100% and turns right 10°, the upper jump is 80% and turns right fully, and the lower jump is 100% and turns right 10°.

[0066] Furthermore, after the step of respectively extracting the position points of the center points of the driving wheels in each extreme state under each working condition of the whole vehicle, the step further includes:

[0067] Extract the position points of the center point of the driving wheel under the condition of the vehicle running straight, under the upper jump limit, full load, half load, no load and lower jump limit;

[0068] Extract the position points of the center point of the driving wheel when the vehicle turns left with the upper jump of 100% and turns left by 10°, the upper jump of 80% and turns left by 100%, and the lower jump of 100% and turns right by 10° respectively;

[0069] The position points of the center point of the driving wheel when the vehicle turns right with an upward jump of 100% and turns right by 10°, when the vehicle jumps up by 80% and turns right by 10°, and when the vehicle jumps down by 100% and turns right by 10° are respectively extracted.

[0070] S105, if not, then connect the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state with point B to generate the corresponding limit center line, and obtain the angle between each limit center line and the baseline AB, and set the maximum angle with the baseline AB as the target angle of the driving half shaft.

[0071] Furthermore, after the step of respectively extracting the position points of the hinge center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judging whether the position points of the hinge center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are surrounded by the conical surface E, it also includes:

[0072] If so, the critical swing angle θ when the driving half shaft is in the reference position is determined as the target angle of the driving half shaft, and the conical surface E is used as the layout boundary surface of the driving half shaft.

[0073] The general GM28 working condition is also applicable to the electric vehicle powertrain. The three-point center of mass suspension design limits its displacement to ±12mm in the X direction, ±10mm in the Y direction, and ±15mm in the Z direction. Space is reserved around the vehicle for the movement of the powertrain: ±25mm in the X direction, ±20mm in the Y direction, and ±25mm in the Z direction. The structural requirements and working principles of the drive half-axle, enterprise specifications: The maximum working swing angle of the outer ball cage fixed universal joint is 50 degrees, and the maximum working swing angle of the inner three-pin sliding joint is 26 degrees. The swing angle and the sliding distance form a driving half-axle displacement swing angle trapezoid. The actual layout design should be as close to the middle of the boundary area as possible and should not exceed the boundary. The left and right drive shaft half-axle motion hard points are symmetrically arranged and designed.

[0074] In summary, the layout verification method of a power transmission system based on CATIA provided by the present invention has the following beneficial effects: the present invention performs modeling based on CATIA, extracts the assembly point A of the inner movable joint of the driving half-shaft and the hinge center point B of the end of the inner movable joint of the driving half-shaft and the connecting shaft away from the point A; takes the point B as the endpoint, connects the point A and the point B as the reference line AB and rotates to form a conical surface E with a cone angle of 2θ, wherein θ is the critical swing angle when the driving half-shaft is in the reference position; respectively extracts the position points and the hinge center points of the outer fixed joint of the driving half-shaft and the connecting shaft in each limit state under each working condition of the whole vehicle. The center point of the driving wheel is at each limit state position point, and it is determined whether the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state are enclosed within the conical surface E; if not, the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state are connected to point B to generate corresponding limit center lines, and the angle between each limit center line and the baseline AB is obtained, and the maximum angle with the baseline AB is defined as the target angle of the driving half shaft. The present invention adopts a layout design verification method based on CATIA modeling, which can quickly design and accurately analyze whether the layout structure of the drive half-shaft is reasonable, thereby improving the structural design efficiency of the transmission shaft and reducing the waste of man-hours caused by repeated engineering plans. Moreover, based on the various limit states of the drive half-shaft and the drive wheel under various working conditions of the whole vehicle, the comprehensiveness and accuracy of the analysis can be improved, and while obtaining the smallest possible drive half-shaft layout angle, the rationality of the drive half-shaft layout angle is guaranteed to the greatest extent possible.

[0075] Example 2

[0076] Please refer to Figure 2 This embodiment provides a layout verification system for a power transmission system based on CATIA, including:

[0077] Acquisition module: used to acquire the CATIA three-dimensional model of the power transmission system, wherein the power transmission system includes a powertrain and a drive half-shaft, wherein the drive half-shaft includes an inner moving section of the drive half-shaft, an outer fixed section of the drive half-shaft and a connecting shaft, and the drive half-shaft is equipped with a drive wheel.

[0078] Extraction module: used to extract the assembly point A of the inner movable joint of the driving half shaft and the hinge center point B of the end of the inner movable joint of the driving half shaft and the connecting shaft away from the point A, wherein the point A coincides with the center point of the output port of the powertrain.

[0079] In which, the power assembly is arranged between the left and right longitudinal beams of the cabin, the drive half shaft is located between the power assembly and the drive wheel and provides power for the left and right drive wheels, and the drive half shaft will jump with the movement of the drive wheel during operation, but one end of the inner moving section of the drive half shaft connected to the power assembly is fixedly connected to the power assembly, and the assembly point is point A, and the other end is relatively slidably connected to the connecting shaft. When the connecting shaft slides to the end away from the power assembly, the hinge center point with the inner moving section of the drive half shaft is point B.

[0080] The extraction module is also used for:

[0081] The contour surface of the power assembly is offset according to a preset offset rule to generate a layout boundary surface of the power assembly.

[0082] The extraction module is also used for:

[0083] The contour surface of the power assembly is obtained, and the contour surface of the power assembly is offset according to the xyz direction offset distance of (a+a1, b+b1, c+c1) to obtain the layout boundary surface of the power assembly, wherein a is the limit displacement of the power assembly in the x direction, a1 is the reserved displacement of the power assembly in the x direction, b is the limit displacement of the power assembly in the y direction, b1 is the reserved displacement of the power assembly in the y direction, cb is the limit displacement of the power assembly in the z direction, and c1 is the reserved displacement of the power assembly in the z direction.

[0084] Manufacturing module: used to connect the point A and the point B as the reference line AB with the point B as the endpoint and rotate to form a conical surface E with a cone angle of 2θ, wherein θ is the critical swing angle when the driving half shaft is in the reference position.

[0085] The manufacturing module is also used for:

[0086] The maximum rotation speed of the driving half shaft is obtained, and the critical swing angle θ when the driving half shaft is in the reference position is calculated according to the maximum rotation speed of the driving half shaft. The calculation formula is:

[0087]

[0088] Wherein, θ is the critical swing angle when the driving half shaft is in the reference position, and n is the maximum rotational speed of the driving half shaft.

[0089] Judgment module: used for respectively extracting the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judging whether the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are enclosed within the conical surface E.

[0090] The judging module is also used for:

[0091] Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the upper jump limit, full load, half load, no load and lower jump limit states respectively under the straight-line driving condition of the whole vehicle;

[0092] Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the left turning driving condition of the whole vehicle respectively when the upper jump is 100% and turns 10° to the left, the upper jump is 80% and turns to the left, and the lower jump is 100% and turns 10° to the right;

[0093] The position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the right turning condition of the whole vehicle are extracted respectively when the upper jump is 100% and turns right 10°, the upper jump is 80% and turns right fully, and the lower jump is 100% and turns right 10°.

[0094] The judging module is also used for:

[0095] Extract the position points of the center point of the driving wheel under the condition of the vehicle running straight, under the upper jump limit, full load, half load, no load and lower jump limit;

[0096] Extract the position points of the center point of the driving wheel when the vehicle turns left with the upper jump of 100% and turns left by 10°, the upper jump of 80% and turns left by 100%, and the lower jump of 100% and turns right by 10° respectively;

[0097] The position points of the center point of the driving wheel when the vehicle turns right with an upward jump of 100% and turns right by 10°, when the vehicle jumps up by 80% and turns right by 10°, and when the vehicle jumps down by 100% and turns right by 10° are respectively extracted.

[0098] Determination module: if not, then connect the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state with point B to generate the corresponding limit center line, and obtain the angle between each limit center line and the baseline AB, and set the maximum angle with the baseline AB as the target angle of the driving half shaft.

[0099] The determining module is also used for:

[0100] If so, the critical swing angle θ when the driving half shaft is in the reference position is determined as the target angle of the driving half shaft, and the conical surface E is used as the layout boundary surface of the driving half shaft.

[0101] Example 3

[0102] Please refer to Figure 3 The present invention further proposes a layout verification device for a power transmission system based on CATIA, which is shown as a layout verification device for a power transmission system based on CATIA in the third embodiment of the present invention, including a memory 20, a processor 10, and a computer program 30 stored in the memory and executable on the processor. When the processor 10 executes the computer program 30, the layout verification method for a power transmission system based on CATIA as described above is implemented.

[0103] Among them, the CATIA-based power transmission system layout verification equipment can specifically be a computer, a server, a host computer, etc., and the processor 10 in some embodiments can be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip, which is used to run the program code stored in the memory 20 or process data, such as executing access restriction programs, etc.

[0104] The memory 20 includes at least one type of readable storage medium, which includes flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 20 can be an internal storage unit of the layout verification device of the power transmission system based on CATIA, such as the hard disk of the layout verification device of the power transmission system based on CATIA. In other embodiments, the memory 20 can also be an external storage device of the layout verification device of the power transmission system based on CATIA, such as a plug-in hard disk equipped on the layout verification device of the power transmission system based on CATIA, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. Further, the memory 20 can also include both the internal storage unit of the layout verification device of the power transmission system based on CATIA and an external storage device. The memory 20 can not only be used to store application software and various types of data installed in the layout verification device of the power transmission system based on CATIA, but also be used to temporarily store data that has been output or is to be output.

[0105] It should be pointed out that Figure 3 The structure shown does not constitute a limitation on the layout verification device of the power transmission system based on CATIA. In other embodiments, the layout verification device of the power transmission system based on CATIA may include fewer or more components than those shown in the figure, or a combination of certain components, or a different arrangement of components.

[0106] The embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the arrangement verification method of a power transmission system based on CATIA as described above is implemented.

[0107] 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 layout verification method for a power transmission system based on CATIA, characterized in that: The method comprises: Obtaining a CATIA three-dimensional model of the power transmission system, wherein the power transmission system includes a power assembly and a drive half shaft, wherein the drive half shaft includes an inner moving section of the drive half shaft, an outer fixed section of the drive half shaft and a connecting shaft, and a drive wheel is mounted on the drive half shaft; Extracting the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the inner moving joint of the driving half shaft and the end of the connecting shaft away from the point A, wherein the point A coincides with the center point of the output port of the powertrain; With the point B as the endpoint, connecting the point A and the point B as the reference line AB and rotating to form a conical surface E with a cone angle of 2θ, wherein θ is the critical swing angle when the driving half shaft is in the reference position; Respectively extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judge whether the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are surrounded by the conical surface E; If not, the hinge center points of the outer fixed joint of the driving half-shaft and the connecting shaft at each extreme state and the center point of the driving wheel at each extreme state are respectively connected to point B to generate the corresponding extreme center line, and the angle between each extreme center line and the baseline AB is obtained, and the largest angle among the angles with the baseline AB is defined as the target angle of the driving half-shaft.

2. The layout verification method of the power transmission system based on CATIA according to claim 1, characterized in that: After the step of respectively extracting the position points of the hinge center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judging whether the position points of the hinge center point of the outer side fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are surrounded by the conical surface E, the step further includes: If so, the critical swing angle θ when the driving half shaft is in the reference position is determined as the target angle of the driving half shaft, and the conical surface E is used as the layout boundary surface of the driving half shaft.

3. The layout verification method of the power transmission system based on CATIA according to claim 1, characterized in that: The working conditions include straight-line driving conditions and turning driving conditions, and the steps of respectively extracting the position points of the hinge center points of the outer fixed joint of the driving half shaft and the connecting shaft in each limit state under each working condition of the whole vehicle include: Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the upper jump limit, full load, half load, no load and lower jump limit states respectively under the straight-line driving condition of the whole vehicle; Extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the left turning driving condition of the whole vehicle respectively when the upper jump is 100% and turns 10° to the left, the upper jump is 80% and turns to the left, and the lower jump is 100% and turns 10° to the right; The position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft under the right turning condition of the whole vehicle are extracted respectively when the upper jump is 100% and turns right 10°, the upper jump is 80% and turns right fully, and the lower jump is 100% and turns right 10°.

4. The layout verification method of a power transmission system based on CATIA according to claim 1, characterized in that: After the step of respectively extracting the position points of the center point of the driving wheel in each limit state under each working condition of the whole vehicle, the following step is further included: Extract the position points of the center point of the driving wheel under the condition of the vehicle running straight, under the upper jump limit, full load, half load, no load and lower jump limit; Extract the position points of the center point of the driving wheel when the vehicle turns left with the upper jump of 100% and turns left by 10°, the upper jump of 80% and turns left by 100%, and the lower jump of 100% and turns right by 10° respectively; The position points of the center point of the driving wheel when the vehicle turns right with an upward jump of 100% and turns right by 10°, when the vehicle jumps up by 80% and turns right by 10°, and when the vehicle jumps down by 100% and turns right by 10° are respectively extracted.

5. The layout verification method of a power transmission system based on CATIA according to claim 1, characterized in that: Before the step of extracting the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the end of the inner moving joint of the driving half shaft and the connecting shaft away from the point A, the step further includes: The contour surface of the power assembly is offset according to a preset offset rule to generate a layout boundary surface of the power assembly.

6. The layout verification method of the power transmission system based on CATIA according to claim 5, characterized in that: The step of offsetting the contour surface of the power assembly according to a preset offset rule to generate a layout boundary surface of the power assembly includes: The contour surface of the power assembly is obtained, and the contour surface of the power assembly is offset according to the xyz direction offset distance of (a+a1, b+b1, c+c1) to obtain the layout boundary surface of the power assembly, wherein a is the limit displacement of the power assembly in the x direction, a1 is the reserved displacement of the power assembly in the x direction, b is the limit displacement of the power assembly in the y direction, b1 is the reserved displacement of the power assembly in the y direction, c is the limit displacement of the power assembly in the z direction, and c1 is the reserved displacement of the power assembly in the z direction.

7. The layout verification method of a power transmission system based on CATIA according to claim 1, characterized in that: The step of taking point B as an endpoint, connecting point A and point B as a reference line AB and rotating to form a conical surface E with a cone angle of 2θ also includes: The maximum rotation speed of the driving half shaft is obtained, and the critical swing angle θ when the driving half shaft is in the reference position is calculated according to the maximum rotation speed of the driving half shaft. The calculation formula is: Wherein, θ is the critical swing angle when the driving half shaft is in the reference position, and n is the maximum rotational speed of the driving half shaft.

8. A layout verification system for a power transmission system based on CATIA, characterized in that: include: An acquisition module is used to acquire a CATIA three-dimensional model of the power transmission system, wherein the power transmission system includes a powertrain and a drive half shaft, wherein the drive half shaft includes an inner moving section of the drive half shaft, an outer fixed section of the drive half shaft and a connecting shaft, and a drive wheel is mounted on the drive half shaft; Extraction module: used to extract the assembly point A of the inner moving joint of the driving half shaft and the hinge center point B of the inner moving joint of the driving half shaft and the end of the connecting shaft away from the point A, wherein the point A coincides with the center point of the output port of the powertrain; Manufacturing module: used to connect the point A and the point B as the reference line AB with the point B as the endpoint and rotate to form a conical surface E with a cone angle of 2θ, wherein θ is the critical swing angle when the driving half shaft is in the reference position; A judgment module: used to respectively extract the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state under each working condition of the whole vehicle, and judge whether the position points of the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the position points of the center point of the driving wheel at each limit state are surrounded by the conical surface E; Determination module: if not, then connect the hinge center point of the outer fixed joint of the driving half shaft and the connecting shaft at each limit state and the center point of the driving wheel at each limit state to the point B to generate the corresponding limit center line, and obtain the angle between each limit center line and the reference line AB, and define the largest angle among the angles with the reference line AB as the target angle of the driving half shaft.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the arrangement verification method of a power transmission system based on CATIA as claimed in any one of claims 1 to 7 is implemented.

10. A layout verification device for a power transmission system based on CATIA, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, the arrangement verification method of a power transmission system based on CATIA as claimed in any one of claims 1 to 7 is implemented.

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