Motor noise optimization method and device, equipment and storage medium

Abstract

The invention discloses a motor noise optimization method, device and equipment and a storage medium, relates to the technical field of automobile noise, and discloses a motor noise optimization method which comprises the following steps: acquiring single motor noise of a target motor and speed reducer noise of a target speed reducer; when the noise of the single motor reaches the standard and the noise of the speed reducer reaches the standard, noise parameters of a motor spline shaft of the target motor at all preset phases are obtained; obtaining a noise state according to the noise parameter; when the noise state is in an abnormal state, noise optimization is carried out according to the noise parameters; according to the method, noise caused by a motor and a speed reducer is excluded by independently detecting noise of the motor and noise of the speed reducer, then noise detection is conducted on a spline shaft of the rotating motor at different phases, noise caused by conformity of the motor and the speed reducer is excluded, and motor design is adjusted to achieve optimization of the noise of the motor. The method can accurately locate the reason causing the noise not to conform to the standard, optimizes the noise in a targeted manner, reduces the noise interference, and improves the user experience.

Description

Technical Field

[0001] The present application relates to the field of automobile noise technology, and in particular to a motor noise optimization method, device, equipment and storage medium. Background Art

[0002] With the widespread adoption of new energy pure electric vehicles, motor reducers have followed the introduction of motors in mass production. As motors boast maximum speeds exceeding 10,000 rpm, the noise requirements for these motors and reducers are becoming increasingly stringent. The noise level of a motor and reducer assembly is not only related to the noise and vibration of the motor and reducer individually, but also to the design and manufacturing precision of their assembly.

[0003] At present, there are still situations where the noise of the motor and reducer are qualified but the assembly noise is abnormal. The production line can only be required to continuously pair the motor and reducer to make the assembly noise normal, which seriously affects the first-time assembly pass rate; for example, for assemblies where the noise cannot be improved in time, the previous assembly noise value of 85 decibels can only be relaxed to 88 decibels, but there is still an unpleasant clicking sound that cannot be solved, which reduces product quality and may cause customer complaints.

[0004] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of this application is to provide a motor noise optimization method, device, equipment and storage medium, aiming to solve the current technical problem that the noise of the motor and reducer are qualified but the assembly noise is abnormal, resulting in obvious noise and poor user experience.

[0006] To achieve the above objectives, the present application proposes a motor noise optimization method, which includes:

[0007] Obtain the single motor noise of the target motor and the reducer noise of the target reducer;

[0008] When the noise of the single motor meets the standard and the noise of the reducer meets the standard, obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase;

[0009] Obtaining a noise state according to the noise parameter;

[0010] When the noise state is in an abnormal state, noise optimization is performed according to the noise parameters.

[0011] In one embodiment, when the noise of the single motor meets the standard and the noise of the reducer meets the standard, obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase includes:

[0012] When the noise level of the single motor and the reducer meet the standards, identifying the assembly hole position phase of the target motor and the target reducer;

[0013] A plurality of preset phases are obtained according to the assembly hole position phases, and noise tests are performed according to the preset phases to obtain noise parameters of the motor spline shaft of the target motor at each preset phase.

[0014] In one embodiment, when the noise of the single motor meets the standard and the noise of the reducer meets the standard, before obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase, the method includes:

[0015] Get the single motor noise threshold and reducer vibration threshold;

[0016] When the noise of the single motor is less than the noise threshold of the single motor, the noise of the single motor meets the standard;

[0017] When the speed reducer noise is less than the speed reducer vibration threshold, the speed reducer noise meets the standard.

[0018] In one embodiment, the noise parameters include noise decibels and noise abnormality levels; and obtaining the noise status according to the noise parameters includes:

[0019] Obtain the noise decibel threshold and the noise level threshold;

[0020] When the noise decibel is greater than or equal to the noise decibel threshold or the noise abnormality level is greater than or equal to the abnormality level threshold, the abnormal state is regarded as the noise state;

[0021] When the noise decibel is less than the noise decibel threshold and the noise abnormality level is less than the abnormality level threshold, the normal state is regarded as the noise state.

[0022] In one embodiment, when the noise state is in an abnormal state, performing noise optimization according to the noise parameters includes:

[0023] When the noise state is in an abnormal state, obtaining a noise parameter difference according to the noise parameters of each preset phase;

[0024] The noise anomaly type is determined according to the noise parameter difference, and noise optimization is performed according to the noise anomaly type.

[0025] In one embodiment, the noise parameter difference includes a noise decibel difference and an abnormal sound level difference;

[0026] Determining the noise anomaly type according to the noise parameter difference, and performing noise optimization according to the noise anomaly type, includes:

[0027] Get the decibel difference threshold and the abnormal sound level difference threshold;

[0028] When the noise decibel difference is greater than or equal to a decibel difference threshold or the abnormal sound level difference is greater than or equal to a level difference threshold, identifying a noise abnormality type, wherein the noise abnormality type includes a compliance abnormality and a centering abnormality;

[0029] Noise optimization is performed based on the coincidence anomaly or the neutrality anomaly.

[0030] In one embodiment, the performing noise optimization based on the compliance anomaly or the neutral anomaly includes:

[0031] When the noise abnormality type is the compliance abnormality, performing a parts standard calibration on the target motor to optimize the noise of the target motor;

[0032] When the noise abnormality type is the neutral abnormality, the spline sizes of the target motor and the target reducer are adjusted to optimize the noise of the target motor.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes a motor noise optimization device, which includes:

[0034] Obtain the single motor noise of the target motor and the reducer noise of the target reducer;

[0035] When the noise of the single motor meets the standard and the noise of the reducer meets the standard, obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase;

[0036] Obtaining a noise state according to the noise parameter;

[0037] When the noise state is in an abnormal state, noise optimization is performed according to the noise parameters.

[0038] In addition, to achieve the above-mentioned purpose, the present application also proposes a motor noise optimization device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program is configured to implement the steps of the motor noise optimization method as described above.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the steps of the motor noise optimization method described above are implemented.

[0040] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the motor noise optimization method as described above are implemented.

[0041] One or more technical solutions proposed in this application have at least the following technical effects:

[0042] By testing the motor noise and reducer noise separately to eliminate the noise caused by the motor and reducer, and then rotating the motor spline shaft to detect noise at different phases, and eliminating the noise caused by the compliance of the motor and reducer, and finally adjusting the motor design to optimize the motor noise, possible noise sources can be gradually eliminated, and the cause of the noise not meeting the standards can be accurately located, so that the noise can be optimized in a targeted manner, effectively reducing noise interference and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0045] Figure 1 A flow chart illustrating a first embodiment of the motor noise optimization method of the present application;

[0046] Figure 2 A schematic diagram of the structure of the motor and reducer provided in Example 1 of the motor noise optimization method of this application;

[0047] Figure 3 A schematic diagram of the preset phase of the motor spline provided in Example 1 of the motor noise optimization method of this application;

[0048] Figure 4 A flow chart of motor and reducer assembly noise optimization provided in Example 1 of the motor noise optimization method of this application;

[0049] Figure 5 A flow chart illustrating a second embodiment of the motor noise optimization method of this application;

[0050] Figure 6 A schematic diagram of the dimensions related to the motor spline installation alignment provided in Example 2 of the motor noise optimization method of this application;

[0051] Figure 7 A schematic diagram of the dimensions related to the spline installation of the reducer provided in Example 2 of the motor noise optimization method of this application;

[0052] Figure 8 A schematic diagram of a table showing changes in noise values ​​after four rotations of the motor shaft angle, provided in Example 2 of the motor noise optimization method of this application;

[0053] Figure 9 A schematic diagram of a table showing the noise repeatability of a motor shaft rotating four times, provided in Example 2 of the motor noise optimization method of this application;

[0054] Figure 10 A schematic diagram of a noise table showing four rotations of the motor shaft angle after the product definition is improved as provided in Example 2 of the motor noise optimization method of this application;

[0055] Figure 11 This is a schematic diagram of the module structure of the motor noise optimization device according to an embodiment of the present application;

[0056] Figure 12 Schematic diagram of the device structure of the hardware operating environment involved in the motor noise optimization method in the embodiment of the present application. DETAILED DESCRIPTION

[0057] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0058] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0059] The main solution of the embodiment of the present application is: to obtain the single motor noise of the target motor and the reducer noise of the target reducer; when the single motor noise meets the standard and the reducer noise meets the standard, to obtain the noise parameters of the motor spline shaft of the target motor at each preset phase; to obtain the noise state according to the noise parameters; and when the noise state is in an abnormal state, to optimize the noise according to the noise parameters.

[0060] In this embodiment, for ease of description, the following description is made with the identification of the motor noise optimization device as the execution subject.

[0061] With the widespread adoption of new energy pure electric vehicles, motor reducers have begun to be used in large quantities along with motors. As the maximum speed of motors exceeds 10,000 rpm, the noise requirements for motors and reducers are becoming increasingly stringent. The noise of the motor and reducer assembly is not only related to the noise and vibration of the motor and reducer individually, but also to the assembly design and manufacturing precision of the two.

[0062] At present, there are still situations where the noise of the motor and reducer are qualified but the assembly noise is abnormal. The production line can only be required to continuously pair the motor and reducer to make the assembly noise normal, which seriously affects the first-time assembly pass rate; for example, for assemblies where the noise cannot be improved in time, the previous assembly noise value of 85 decibels can only be relaxed to 88 decibels, but there is still an unpleasant clicking sound that cannot be solved, which reduces product quality and may cause customer complaints.

[0063] This application provides a solution by separately detecting the motor noise and reducer noise to eliminate the noise caused by the motor and reducer, and then rotating the motor spline shaft to detect the noise at different phases. After eliminating the noise caused by the compliance of the motor and reducer, the motor design is adjusted to optimize the motor noise. It can accurately locate the cause of the noise not meeting the standards, optimize the noise in a targeted manner, reduce noise interference, and improve user experience.

[0064] It can be seen from the above embodiments that the present application discloses a motor noise optimization method, device, equipment and storage medium, which relates to the field of automobile noise technology, and discloses a motor noise optimization method, including: obtaining the single motor noise of the target motor and the reducer noise of the target reducer; when the single motor noise meets the standard and the reducer noise meets the standard, obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase; obtaining the noise state according to the noise parameters; when the noise state is in an abnormal state, performing noise optimization according to the noise parameters; this method detects the motor noise and reducer noise separately to eliminate the noise caused by the motor and reducer, and then rotates the motor spline shaft to perform noise detection at different phases. After eliminating the noise caused by the compliance of the motor and reducer, the motor design is adjusted to achieve optimization of the motor noise, which can accurately locate the cause of the noise not meeting the standard, optimize the noise in a targeted manner, reduce noise interference, and improve user experience.

[0065] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or an electronic device capable of performing the above functions, such as a motor noise optimization device. The following uses the motor noise optimization device as an example to illustrate this embodiment and the following embodiments.

[0066] Based on this, the embodiment of the present application provides a motor noise optimization method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the motor noise optimization method of the present application.

[0067] In this embodiment, the motor noise optimization method includes steps S10 to S40:

[0068] Step S10: Acquire the single motor noise of the target motor and the reducer noise of the target reducer.

[0069] It is understandable that the optimization direction of the motor noise of the present invention can be to conduct a comprehensive analysis on both the single motor and the reducer, and finally locate the specific noise source.

[0070] It should be noted that the motor's external spline is connected to the reducer's internal spline. The motor and reducer's structural diagram can be found in Figure 2 In the figure, the external spline of the motor is connected to the internal spline of the reducer at point 1, the driving gear of the reducer shaft 1 is meshed with the driven gear on the second shaft at point 2, the driving gear of the reducer shaft 2 is meshed with the differential gear at point 3, Figure 4 is the reducer shaft 1, Figure 5 is the reducer shaft 2, and Figure 6 is the differential of the reducer.

[0071] It should be understood that when a motor is produced off the assembly line, a separate noise test on a single motor can be performed to obtain the noise of the single motor; similarly, when a reducer is produced off the assembly line, a separate noise test on a single motor can be performed to obtain the noise of the reducer.

[0072] Step S20 , when the noise of the single motor meets the standard and the noise of the reducer meets the standard, obtain the noise parameters of the motor spline shaft of the target motor at each preset phase.

[0073] It should be noted that when the single motor noise meets the standard and the reducer noise meets the standard, before obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase, it includes: obtaining the single motor noise threshold and the reducer vibration threshold; when the single motor noise is less than the single motor noise threshold, the single motor noise meets the standard; when the reducer noise is less than the reducer vibration threshold, the reducer noise meets the standard.

[0074] It should be noted that the single motor noise threshold and the reducer vibration threshold can be pre-set noise decibel values ​​and reducer vibration frequencies. The values ​​can be tested to determine that a single motor at this noise decibel value or a single reducer below this frequency will not cause obvious interference to the user. When the noise decibel value or frequency is above or equal to this decibel value and frequency, the user can hear obvious noise or abnormal sound while driving the vehicle.

[0075] It should be noted that the noise parameters include noise decibels and noise abnormality levels. It is understandable that the noise abnormality level can be determined based on a preset standard, which can be obtained through empirical classification.

[0076] It is understandable that obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase may be to predetermine each different phase and measure the assembly noise and abnormal noise level of the motor at different phases.

[0077] It is understandable that the assembly noise may refer to the noise generated by the motor when the motor and the reducer are in meshing state.

[0078] In specific implementation, any assemblies found to have motor and reducer noise exceeding 85 decibels and abnormal rattling noises at level 3 or above after leaving the production line will be detained and intercepted. The faulty assembly will be disassembled and the noise of the single motor and abnormal noise will be tested. If the noise of the single motor exceeds the standard 80 decibels or there is abnormal noise, a new motor with qualified noise will be replaced and the noise decibel and abnormal noise level will be retested. If the motor passes the test, the reducer will be disassembled and tested on the reducer test bench for noise. If the vibration of the single reducer exceeds the vibration threshold, a new motor reducer with qualified noise (vibration) will be replaced until the reducer vibration is below the vibration threshold. The noise of the single motor and the reducer meet the standard.

[0079] In a feasible implementation, step S20 may include steps A21 to A22:

[0080] Step A21 , when the noise of the single motor meets the standard and the noise of the reducer meets the standard, identifying the assembly hole position phase of the target motor and the target reducer.

[0081] It is understandable that the assembly hole phase can be the original phase when the motor and the reducer are engaged, which can be simply understood as the initial engagement angle.

[0082] Step A22: obtaining a plurality of preset phases according to the assembly hole position phases, performing noise testing according to the preset phases, and obtaining noise parameters of the motor spline shaft of the target motor at each preset phase.

[0083] It should be understood that the preset phase can be a relatively fixed rotation angle, or it can be the phase corresponding to three 90-degree rotations based on the assembly hole phase. For example, the four preset phases are fixed to due north, due east, due south, and due west. Alternatively, the assembly hole phase can be used as the starting phase, and a 90-degree rotation can be used as the first preset phase, a 180-degree rotation can be used as the second preset phase, and a 270-degree rotation can be used as the third preset phase.

[0084] It should be noted that the noise decibel values ​​and abnormal sound levels are measured at different preset phases as noise parameters at each preset phase.

[0085] In the specific implementation, the preset phase diagram of the motor spline can be referred to Figure 3 , just before assembling the motor Figure 3 Mark the top of the motor spline shaft lying flat as shown. Figure 3Figure 1 shows the pre-positioning holes for the motor and reducer assembly. The marker is then rotated to the four phases shown in the figure: 0 degrees (Figure 2), 90 degrees (Figure 3), 180 degrees (Figure 4), and 270 degrees (Figure 5). Four assembly tests are performed (the phase of the reducer spline remains fixed). The test results at different rotation angles (phases) are recorded, i.e., the noise parameters at different preset phases.

[0086] In this embodiment, when the single motor noise meets the standard and the reducer noise meets the standard, the meshing angle of the motor spline and the reducer spline is adjusted and then the noise is measured. Based on whether the noise at different angles exceeds the standard, it can be further determined whether the noise is caused by the compliance problem of the motor and reducer, and the noise source can be accurately located for noise optimization.

[0087] The above is merely a feasible implementation of step S20 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S20.

[0088] Step S30: Obtaining the noise state according to the noise parameters.

[0089] It is understood that the noise state can include a normal state and an abnormal state. Simply put, the normal state can be when the noise parameters have a very low decibel value and a low abnormal sound level, without producing noticeable noise that affects the user experience. The abnormal state can be when the noise decibel value is high, which affects the user's driving experience, or when the abnormal sound level is high, which also affects the user's driving experience.

[0090] It can be understood that the noise decibel value in the noise parameters is the decibel value of the assembly noise; similarly, the abnormal noise level is the abnormal noise level detected when the motor and reducer are engaged.

[0091] In a feasible implementation, step S30 may include steps A31 to A33:

[0092] Step A31: Obtain the noise decibel threshold and the noise abnormality level threshold.

[0093] It is understandable that the noise decibel threshold may be the minimum noise value and minimum abnormal noise level acceptable to the user for the assembly noise setting.

[0094] In a specific implementation, the noise decibel threshold may be 85 decibels, and the noise level threshold may be level 3.

[0095] Step A32: When the noise decibel is greater than or equal to the noise decibel threshold or the noise abnormality level is greater than or equal to the abnormality level threshold, the abnormal state is regarded as the noise state.

[0096] It is understandable that when the noise decibel exceeds the noise decibel threshold, it will affect the user experience; similarly, when the noise level exceeds the noise level threshold, it will affect the user experience.

[0097] It should be understood that when the noise decibel is greater than or equal to the noise decibel threshold or the abnormal noise level exceeds the abnormal noise level threshold, either of the two conditions is met, the noise state can be understood as an abnormal state.

[0098] Step A33: When the noise decibel is less than the noise decibel threshold and the noise abnormality level is less than the abnormality level threshold, the normal state is regarded as the noise state.

[0099] It is understandable that for the noise state to be in a normal state, it is necessary to simultaneously meet the conditions that the noise decibel is less than the noise threshold and the abnormal noise level is less than the abnormal level threshold.

[0100] In this embodiment, the noise decibels and abnormal noise levels in the noise parameters are judged separately to determine whether they will affect the user's driving experience, thereby determining whether the noise state is normal, and based on the noise state, targeted noise optimization is performed at different angles for different states.

[0101] The above is only a feasible implementation of step S30 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S30.

[0102] Step S40 : When the noise state is normal but the noise dispersion of different phases is large, noise optimization is performed according to the noise parameters.

[0103] It should be noted that when the noise state is in a normal state, there may still be large differences in noise at different phases, and noise optimization can be further performed based on the noise parameters. Here, the noise state is in a normal state when the noise decibels and abnormal sound levels at each preset phase do not affect the user driver.

[0104] It should be understood that since only four phases are preset, the noise decibels and abnormal noise levels are limited in representativeness. In order to avoid loud noise and more obvious abnormal noise during driving, it is also necessary to further determine whether there is a compliance or neutrality problem based on the difference in noise parameters.

[0105] It should be emphasized that when the noise state is in an abnormal state, it can be located that the noise is generated by the meshing of the motor and the reducer in that phase, and noise optimization can be performed to address this problem.

[0106] In specific implementation, the noise optimization process of the motor and reducer assembly can refer to Figure 4In the figure, when the noise of the motor and reducer is abnormal, the motor noise is first disassembled and tested. When the motor noise is unqualified, the motor is replaced; when the motor noise is qualified, the reducer noise is tested. When the reducer noise is unqualified, the reducer is replaced. When the reducer noise is qualified, the motor shaft is rotated 90 degrees each time, and tested 4 times. The noise results of each test are compared. If the noise result of each test is qualified by rotating the motor shaft angle and reassembling, it meets the requirements and production is carried out; if the difference between the noise results of each test is large, it is further judged whether there is a part compliance problem. If it is a compliance problem, the compliance between the motor and the reducer is rectified. If there is no compliance problem, alignment optimization is performed until the difference between the four noises is less than or equal to 3 decibels, and the noise optimization is completed.

[0107] This embodiment provides a motor noise optimization method, which detects the motor noise and reducer noise separately to eliminate the noise caused by the motor and reducer, then rotates the motor spline shaft to detect noise at different phases, eliminates the noise caused by the compliance of the motor and reducer, and finally adjusts the motor design to optimize the motor noise. It can gradually eliminate possible noise sources and accurately locate the reasons for the noise not meeting the standards, so that the noise can be optimized in a targeted manner, effectively reducing noise interference and improving the user experience.

[0108] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 5 , step S40 further includes steps S41 to S42:

[0109] Step S41 : when the noise state is in a normal state, obtaining a noise parameter difference according to the noise parameters of each preset phase.

[0110] It should be noted that the noise parameter difference includes the noise decibel difference and the abnormal sound level difference.

[0111] It is understandable that when the noise state is in a normal state, the abnormal sound level and noise decibel of each preset phase are normal and will not cause noise impact on the user.

[0112] It should be noted that the noise parameter difference obtained according to the noise parameters of each preset phase can be obtained by subtracting the noise decibels of each preset phase from each other to obtain the noise difference. For example, if the noise decibels of the four phases are a, b, c, and d, then the noise difference includes |ab|, |ac|, |ad|, |bc|, |bd|, and |cd|; similarly, the abnormal sound level difference is also obtained by subtracting the abnormal sound levels of each preset phase from each other.

[0113] Step S42: determining the noise anomaly type according to the noise parameter difference, and performing noise optimization according to the noise anomaly type.

[0114] It is understandable that the noise anomaly types may include compliance anomaly and alignment anomaly, and noise optimization needs to be performed specifically for different anomaly types.

[0115] In specific implementation, if the test does not find any compliance issues, the product design improvement stage will be entered to optimize the noise. If there are compliance issues, noise optimization will be carried out to address the compliance issues.

[0116] In a feasible implementation, step S42 may include steps A421 to A423:

[0117] Step A421: Obtain a decibel difference threshold and an abnormal sound level difference threshold.

[0118] It is understandable that the decibel difference threshold may be 3 decibels, and the abnormal sound level difference may be 3 levels. The decibel difference threshold and the abnormal sound level difference threshold may also be adjusted as needed, and this embodiment does not limit this.

[0119] Step A422: When the noise decibel difference is greater than or equal to the decibel difference threshold or the abnormal sound level difference is greater than or equal to the level difference threshold, identify the noise abnormality type, which includes compliance abnormality and neutrality abnormality.

[0120] It should be noted that when the noise decibel difference is less than the decibel difference threshold and the abnormal sound level difference is less than the level difference threshold, the motor and reducer can be reassembled by rotating the motor shaft angle to complete the noise optimization.

[0121] It should be emphasized that when the noise decibel difference is greater than the decibel difference threshold and the abnormal sound level difference is greater than the level difference threshold, the compliance of the relevant parts should be checked first. If the inspection finds that there is a problem with the compliance, rectification should be carried out, and a new round of noise optimization should be carried out after the rectification.

[0122] Furthermore, if the inspection does not find any compliance problems, the product design improvement stage will be entered; since the noise problems of the single motor and reducer have been eliminated in the J2 and J5 stages, but the noise decibel value of the assembly exceeds the standard or there is abnormal noise after assembly, the abnormality type is identified as a neutral abnormality.

[0123] Step A423: Perform noise optimization based on the compliance anomaly or the neutral anomaly.

[0124] It should be noted that when the noise abnormality type is the compliance abnormality, the target motor is subjected to parts standard calibration to optimize the noise of the target motor; when the noise abnormality type is the neutrality abnormality, the spline neutrality-related dimensions of the target motor and the target reducer are adjusted to optimize the noise of the target motor.

[0125] It should be noted that the problem of neutrality can be solved by adjusting the relevant dimensions of the spline neutrality of both the motor and the reducer.

[0126] In specific implementation, if after the rectification of the motor and reducer (both of which meet the individual noise standards) are assembled, the noise decibel value is still greater than or equal to 3 decibels when the motor shaft rotates four times, or there is a rattling sound greater than or equal to level 3, it means that the product design rectification is not in place and needs to be rectified again. If after the rectification of the motor and reducer (both of which meet the individual noise standards) are assembled, the noise decibel value is still less than 3 decibels when the motor shaft rotates four times, and the rattling sound is less than level 3, it means that the product design rectification is in place, the product design can be solidified, and the problem can be closed.

[0127] Among them, it should be noted that the identification of compliance anomalies can be done by identifying the part size and performing a compliance check on the part size. Since the noise of the single motor and reducer are both qualified, the focus is on detecting the relevant dimensions that affect the spline alignment of the two. The schematic diagram of the motor spline installation related dimensions can be referred to. Figure 6 , Figure 6 Figure 2 shows the coaxiality between the motor's internal spline pitch circle and the mounting locating outer surface. Figure 3 shows the perpendicularity between the motor's internal spline shaft centerline and the mounting locating end surface. Figure 4 shows the flatness of the motor and reducer mounting end surfaces, as well as the perpendicularity between the internal spline pitch circle and the motor end surface. For a schematic diagram of the dimensions related to the reducer spline installation alignment, please refer to Figure 7 , Figure 7 Figure 1 shows the coaxiality between the reducer's external spline pitch circle and the center of the reducer's mounting internal positioning cylindrical surface. Figure 2 shows the perpendicularity between the reducer's external spline and the mounting end face. Figure 3 shows the flatness of the mounting end face and its perpendicularity to the center of the mounting cylindrical surface.

[0128] In this implementation, by evaluating the rationality of the product definition requirements for the alignment of the motor shaft and reducer shaft required to achieve the ideal assembly noise standard, the phase angles of the produced motors and reducers are quickly adjusted, waste is reduced, and the first-time assembly pass rate is increased, thereby improving product quality and customer driving experience.

[0129] The above is merely a feasible implementation of step S42 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S42.

[0130] In the specific implementation, two two-in-one assemblies with typical noise problems were selected to conduct noise tests with the motors rotating four times and to detect the dimensions related to neutrality. The results can be referred to Figure 8 , Figure 8 The combination of No. 002 motor and No. 004 reducer has a minimum noise decibel value of 83dB and a maximum of 88dB. The minimum rattling sound is extremely mild level 1 and the maximum is medium level 3. The minimum level of noise and the maximum level of rattling sound are not in the same position, and the maximum level of noise and the maximum level of rattling sound are also not in the same position. The spline fit and the concentricity dimensions meet the requirements of the product drawings.

[0131] Furthermore, we selected two two-in-one assemblies with typical noise problems to conduct noise tests with the motors rotating four times and to test the dimensions related to neutrality. The results can be referred to Figure 9 , Figure 9 The combination of No. 772 motor and No. 220 reducer has a minimum noise decibel value of 82dB and a maximum of 94dB. The minimum rattling sound is extremely mild at level 1, and the maximum is very loud. The minimum and maximum levels of noise and rattling sound are at the same position. In terms of the spline matching and concentricity dimensions, except for the No. 220 reducer, the cumulative error of the spline tooth pitch exceeds the upper limit of 0.06, and the other dimensions meet the requirements of the product drawings.

[0132] Furthermore, in order to verify the repeatability of the above test method, a typical noise problem No. 705 motor and No. 159 reducer two-in-one assembly were selected to conduct noise testing of the motor four times and to detect the neutrality-related dimensions. The results are as follows: Figure 8 As stated: The lowest noise occurs at the 45-degree position, the minimum noise decibel value is 81.6dB and the maximum is 90.5dB, the minimum rattling sound is mild level 2 and the maximum is level 5, the minimum and maximum levels of noise and rattling sound are basically at the same position; the spline fit and concentricity dimensions meet the requirements of the product drawings.

[0133] It should be emphasized that, based on the above test data, the excessive coaxiality of the motor spline is the main reason for the increase in the rattling sound and the assembly noise exceeding 88dB. The cumulative error of the reducer spline tooth pitch is an auxiliary factor that causes the rattling sound to increase to a very large level.

[0134] It should be noted that, in combination with the relevant dimensional definitions and manufacturing capabilities of the motor and reducer, the coaxiality of the internal and external splines is tightened to 0.10, the verticality is set to 0.04, and the cumulative error of the spline tooth pitch is set to 0.045 according to the gear standard of the same precision level. The motor and reducer produced according to the new definition are assembled, and the four motor angle positioning tests and the rattling sound are carried out according to the method of the present invention. The spline centering size is tested. The results can be referred to Figure 10 , Figure 10The minimum noise level of the central assembly is 80.4dB, the maximum is 84.5dB, the minimum rattling sound is extremely mild level 1, and the maximum is mild level 2. The noise level of the four position assemblies is extremely poor at 2.8dB, and the rattling sound is mild.

[0135] This embodiment provides a method for optimizing motor noise. By analyzing the important influence of the matching phase of the motor spline and the reducer spline on the motor and reducer assembly, the matching angle between the motor shaft spline and the reducer shaft spline is changed by rotating the motor shaft spline phase angle, thereby changing the high and low point matching of the comprehensive neutral error between the two splines, changing the clearance of the primary gear meshing pair inside the reducer, and thus reducing the decibel value of the assembly noise or eliminating the rattling sound.

[0136] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the motor noise optimization method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0137] This application also provides a motor noise optimization device, please refer to Figure 11 , the motor noise optimization device includes:

[0138] The noise acquisition module 10 is used to acquire the single motor noise of the target motor and the reducer noise of the target reducer;

[0139] The noise detection module 20 is configured to obtain the noise parameters of the motor spline shaft of the target motor at each preset phase when the noise of the single motor and the noise of the reducer meet the standards;

[0140] A noise optimization module 30 is used to obtain a noise state according to the noise parameters;

[0141] The noise optimization module 30 is further configured to perform noise optimization according to the noise parameters when the noise state is in a normal state.

[0142] The motor noise optimization device provided in this application, which utilizes the motor noise optimization method of the above-mentioned embodiment, can solve the current problem of being unable to effectively improve the noise of the motor and reducer, but abnormal assembly noise, resulting in noticeable noise and a poor user experience. Compared with the prior art, the beneficial effects of the motor noise optimization device provided in this application are the same as those of the motor noise optimization method provided in the above-mentioned embodiment, and the other technical features of the motor noise optimization device are the same as those disclosed in the above-mentioned embodiment method, and are not further described here.

[0143] In one embodiment, the noise detection module 20 is further configured to identify the assembly hole position phase of the target motor and the target reducer when the noise of the single motor meets the standard and the noise of the reducer meets the standard;

[0144] A plurality of preset phases are obtained according to the assembly hole position phases, and noise tests are performed according to the preset phases to obtain noise parameters of the motor spline shaft of the target motor at each preset phase.

[0145] In one embodiment, the noise detection module 20 is further used to obtain a single motor noise threshold and a reducer vibration threshold;

[0146] When the noise of the single motor is less than the noise threshold of the single motor, the noise of the single motor meets the standard;

[0147] When the speed reducer noise is less than the speed reducer vibration threshold, the speed reducer noise meets the standard.

[0148] In one embodiment, the noise optimization module 30 is further configured to obtain a noise decibel threshold and a noise abnormality level threshold;

[0149] When the noise decibel is greater than or equal to the noise decibel threshold or the noise abnormality level is greater than or equal to the abnormality level threshold, the abnormal state is regarded as the noise state;

[0150] When the noise decibel is less than the noise decibel threshold and the noise abnormality level is less than the abnormality level threshold, the normal state is regarded as the noise state.

[0151] In one embodiment, the noise optimization module 30 is further configured to obtain a noise parameter difference according to the noise parameters of each preset phase when the noise state is in a normal state;

[0152] The noise anomaly type is determined according to the noise parameter difference, and noise optimization is performed according to the noise anomaly type.

[0153] In one embodiment, the noise optimization module 30 is further configured to obtain a decibel difference threshold and an abnormal sound level difference threshold;

[0154] When the noise decibel difference is greater than or equal to a decibel difference threshold or the abnormal sound level difference is greater than or equal to a level difference threshold, identifying a noise abnormality type, wherein the noise abnormality type includes a compliance abnormality and a centering abnormality;

[0155] Noise optimization is performed based on the coincidence anomaly or the neutrality anomaly.

[0156] In one embodiment, the noise optimization module 30 is further configured to perform a parts standard calibration on the target motor to optimize the noise of the target motor when the noise abnormality type is the compliance abnormality;

[0157] When the noise abnormality type is the neutral abnormality, the spline sizes of the target motor and the target reducer are adjusted to optimize the noise of the target motor.

[0158] The present application provides a motor noise optimization device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the motor noise optimization method in the above-mentioned embodiment one.

[0159] Reference below Figure 12 , which shows a schematic diagram of the structure of a motor noise optimization device suitable for implementing the embodiments of the present application. The motor noise optimization device in the embodiments of the present application can include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), and in-vehicle terminals (such as in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 12 The motor noise optimization device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0160] like Figure 12As shown, the motor noise optimization device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 1002 or programs loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for the operation of the motor noise optimization device. Processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007, such as a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008, such as a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003, such as a magnetic tape or hard disk; and communication devices 1009. Communication device 1009 can allow the motor noise optimization device to communicate with other devices wirelessly or wired to exchange data. Although the figure shows a motor noise optimization device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have alternatively.

[0161] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0162] The motor noise optimization device provided in this application, which utilizes the motor noise optimization method of the above-described embodiment, can solve the current problem of being unable to effectively improve the motor and reducer noise while the assembly noise is abnormal, resulting in noticeable noise and a poor user experience. Compared with the prior art, the beneficial effects of the motor noise optimization device provided in this application are the same as those of the motor noise optimization method provided in the above-described embodiment, and the other technical features of the motor noise optimization device are the same as those disclosed in the method of the previous embodiment, and are not further described here.

[0163] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0164] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0165] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, a computer program) stored thereon, wherein the computer-readable program instructions are used to execute the motor noise optimization method in the above-mentioned embodiment.

[0166] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0167] The computer-readable storage medium may be included in the motor noise optimization device; or may exist independently without being assembled into the motor noise optimization device.

[0168] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the motor noise optimization device, the motor noise optimization device: obtains the single motor noise of the target motor and the reducer noise of the target reducer; when the single motor noise meets the standard and the reducer noise meets the standard, obtains the noise parameters of the motor spline shaft of the target motor at each preset phase; obtains the noise state according to the noise parameters; and when the noise state is in a normal state, performs noise optimization according to the noise parameters.

[0169] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0170] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0171] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0172] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., a computer program) for executing the above-mentioned motor noise optimization method. This computer-readable storage medium can solve the current problem of being unable to effectively improve the noise of the motor and reducer, but abnormal assembly noise, resulting in obvious noise and a poor user experience. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the motor noise optimization method provided in the above-mentioned embodiment, and will not be elaborated here.

[0173] The present application also provides a computer program product, comprising a computer program, which implements the steps of the motor noise optimization method as described above when the computer program is executed by a processor.

[0174] The computer program product provided in this application can address the current technical problem of being unable to effectively improve the noise level of both the motor and reducer, but abnormal assembly noise, resulting in noticeable noise and a poor user experience. Compared to the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the motor noise optimization method provided in the above-mentioned embodiment, and will not be elaborated here.

[0175] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A motor noise optimization method, characterized in that: The motor noise optimization method comprises: Obtain the single motor noise of the target motor and the reducer noise of the target reducer; When the noise of the single motor meets the standard and the noise of the reducer meets the standard, obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase; Obtaining a noise state according to the noise parameters; When the noise state is in an abnormal state, noise optimization is performed according to the noise parameters.

2. The motor noise optimization method according to claim 1, characterized in that: When the noise of the single motor meets the standard and the noise of the reducer meets the standard, obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase includes: When the noise level of the single motor and the reducer meet the standards, identifying the assembly hole position phase of the target motor and the target reducer; A plurality of preset phases are obtained according to the assembly hole position phases, and noise tests are performed according to the preset phases to obtain noise parameters of the motor spline shaft of the target motor at each preset phase.

3. The motor noise optimization method according to claim 2, characterized in that: When the noise of the single motor meets the standard and the noise of the reducer meets the standard, before obtaining the noise parameters of the motor spline shaft of the target motor at each preset phase, the method includes: Get the single motor noise threshold and reducer vibration threshold; When the noise of the single motor is less than the noise threshold of the single motor, the noise of the single motor meets the standard; When the speed reducer noise is less than the speed reducer vibration threshold, the speed reducer noise meets the standard.

4. The motor noise optimization method according to claim 1, characterized in that: The noise parameters include noise decibels and noise abnormality levels; and obtaining the noise state according to the noise parameters includes: Obtain the noise decibel threshold and the noise level threshold; When the noise decibel is greater than or equal to the noise decibel threshold or the noise abnormality level is greater than or equal to the abnormality level threshold, the abnormal state is regarded as the noise state; When the noise decibel is less than the noise decibel threshold and the noise abnormality level is less than the abnormality level threshold, the normal state is regarded as the noise state.

5. The motor noise optimization method according to claim 1, characterized in that: When the noise state is in an abnormal state, performing noise optimization according to the noise parameters includes: When the noise state is in an abnormal state, obtaining a noise parameter difference according to the noise parameters of each preset phase; The noise anomaly type is determined according to the noise parameter difference, and noise optimization is performed according to the noise anomaly type.

6. The motor noise optimization method according to claim 5, characterized in that: The noise parameter difference includes the noise decibel difference and the abnormal sound level difference; Determining the noise anomaly type according to the noise parameter difference, and performing noise optimization according to the noise anomaly type, includes: Get the decibel difference threshold and the abnormal sound level difference threshold; When the noise decibel difference is greater than or equal to a decibel difference threshold or the abnormal sound level difference is greater than or equal to a level difference threshold, identifying a noise abnormality type, wherein the noise abnormality type includes a compliance abnormality and a centering abnormality; Noise optimization is performed based on the coincidence anomaly or the neutrality anomaly.

7. The motor noise optimization method according to claim 6, characterized in that: The performing noise optimization based on the compliance anomaly or the neutral anomaly includes: When the noise abnormality type is the compliance abnormality, performing a parts standard calibration on the target motor to optimize the noise of the target motor; When the noise abnormality type is the neutral abnormality, the spline sizes of the target motor and the target reducer are adjusted to optimize the noise of the target motor.

8. A motor noise optimization device, characterized in that: The motor noise optimization device comprises: A noise acquisition module is used to acquire the single motor noise of the target motor and the reducer noise of the target reducer; a noise detection module, configured to obtain noise parameters of the motor spline shaft of the target motor at each preset phase when the noise of the single motor and the noise of the reducer meet the standards; A noise optimization module, configured to obtain a noise state according to the noise parameters; The noise optimization module is further configured to perform noise optimization according to the noise parameters when the noise state is in an abnormal state.

9. A motor noise optimization device, characterized in that: The device includes: a memory, a processor, and a motor noise optimization program stored in the memory and executable on the processor, wherein the motor noise optimization program is configured to implement the motor noise optimization method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a motor noise optimization program, and when the motor noise optimization program is executed by the processor, the motor noise optimization method according to any one of claims 1 to 7 is implemented.

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