Method and device for estimating internal impact load of transmission

Abstract

The invention relates to the technical field of transmission testing, in particular to a transmission internal impact load estimation method and device.The method comprises the steps that a preset impact working condition test is conducted on a target transmission so as to collect the input shaft rotating speed and the output shaft rotating speed of the target transmission; calculating a rotating speed ratio between the rotating speed of the input shaft and the rotating speed of the output shaft, calculating an equivalent rotating speed of the input shaft according to the rotating speed ratio, and calculating a transmission shaft system torsion angle corresponding to the target transmission under the impact working condition based on the equivalent rotating speed of the input shaft; the torsional rigidity of the target transmission is obtained, and the impact load in the target transmission is calculated according to the torsional rigidity and the transmission shafting torsional angle. Therefore, the problem that the internal impact load of the transmission cannot be efficiently and accurately measured in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission test, in particular to a transmission internal impact load estimation method and device. BACKGROUND

[0002] With the rapid development of domestic automobile industry, in order to meet the needs of users for more vehicle scenes, the domestic OEMs cover more comprehensively in the transmission durability test, including mis-shift condition, high-low road surface switching condition, emergency braking condition, clutch slip condition, engine knock condition and other conditions that may impact the transmission. Whether the transmission function fails after a specific test and the damage of the internal components of the transmission after disassembly are analyzed to determine whether the transmission durability meets the standard. However, due to the limitation of the closed space of the transmission, the impact load is usually collected by arranging a torque measuring device on the output shaft, and the impact load inside the transmission cannot be directly measured.

[0003] At present, the existing technology mostly adopts the test strategy of arranging a torque sensor on the output end of the reducer in the bench state, and directly acquiring the impact load by using a data acquisition system. Specifically, the existing technology can simulate the impact load borne by the main gear and the driven gear of the main reducer in the whole vehicle state when the vehicle is running, and acquire the impact load size by arranging a torque sensor. In addition, the existing technology can also build a test bench, connect the half shaft, connecting disc and torque speed sensor in sequence on the output of the new energy reducer to be tested, and test the impact load by the torque sensor.

[0004] However, since the transmission is a closed structure, the existing technology cannot measure the impact load inside the transmission, and the torque measuring device needs to be arranged to acquire the wheel rim impact load, which greatly affects the efficiency of impact load measurement, and needs to be solved urgently. SUMMARY

[0005] The present application provides a transmission internal impact load estimation method and device to solve the problem that the existing technology cannot efficiently and accurately measure the impact load inside the transmission.

[0006] The first aspect embodiment of the present application provides a transmission internal impact load estimation device, comprising the following steps: performing a preset impact condition test on a target transmission to collect the input shaft speed and output shaft speed of the target transmission; calculating the speed ratio between the input shaft speed and the output shaft speed, and calculating the input shaft equivalent speed according to the speed ratio, and calculating the corresponding transmission shaft torsion angle of the target transmission under the impact condition based on the input shaft equivalent speed; obtaining the torsional stiffness of the target transmission, and calculating the impact load inside the target transmission according to the torsional stiffness and the transmission shaft torsion angle.

[0007] According to the above technical means, the embodiment of the present application calculates the torsion angle of the transmission shaft system under the impact working condition by collecting the rotating speeds of the input shaft and the output shaft, and performs operation with the torque stiffness of the transmission, so as to estimate the impact load inside the transmission, thereby providing reliable data and technical support for the strength design or failure problem reason analysis of the transmission shaft system and the shell.

[0008] Optionally, in an embodiment of the present application, the preset impact working condition test on the target transmission is performed to collect the rotating speeds of the input shaft and the output shaft of the target transmission, which comprises: installing preset Hall rotating speed sensors at the positions of the input shaft and the output shaft of the target transmission respectively, so as to generate corresponding rotating speed signals through the Hall rotating speed sensors; inputting the rotating speed signals into a preset data acquisition system, and determining the rotating speed acquisition requirement corresponding to the target transmission, so as to determine the sampling frequency and the sampling time length corresponding to the target transmission according to the rotating speed acquisition requirement; performing the preset impact working condition test operation on the target transmission based on the sampling frequency and the sampling time length, so as to collect the rotating speed pulse signals in the impact working condition test process, and obtain the gear tooth number corresponding to the target transmission, and perform data processing on the rotating speed pulse signals by using the gear tooth number, so as to obtain the rotating speeds of the input shaft and the output shaft of the target transmission.

[0009] According to the above technical means, the embodiment of the present application calculates the torsion angle of the transmission shaft system under the impact working condition by collecting the rotating speeds of the input shaft and the output shaft, and performs operation with the torque stiffness of the transmission, so as to estimate the impact load inside the transmission, thereby providing reliable data and technical support for the strength design or failure problem reason analysis of the transmission shaft system and the shell.

[0010] Optionally, in an embodiment of the present application, the preset impact working condition test on the target transmission is performed to collect the rotating speeds of the input shaft and the output shaft of the target transmission, which comprises: installing preset Hall rotating speed sensors at the positions of the input shaft and the output shaft of the target transmission respectively, so as to generate corresponding rotating speed signals through the Hall rotating speed sensors; inputting the rotating speed signals into a preset data acquisition system, and determining the rotating speed acquisition requirement corresponding to the target transmission, so as to determine the sampling frequency and the sampling time length corresponding to the target transmission according to the rotating speed acquisition requirement; performing the preset impact working condition test operation on the target transmission based on the sampling frequency and the sampling time length, so as to collect the rotating speed pulse signals in the impact working condition test process, and obtain the gear tooth number corresponding to the target transmission, and perform data processing on the rotating speed pulse signals by using the gear tooth number, so as to obtain the rotating speeds of the input shaft and the output shaft of the target transmission.

[0011] Based on the above-mentioned technical means, the embodiments of this application measure the rotational speeds of the input and output shafts of the transmission using a speed sensor, and calculate the torsional angle of the transmission shaft system by integrating and subtracting the results. This can accurately reflect the force and deformation of the transmission shaft system during the impact process, providing a reliable basis for evaluating the gear meshing state and optimizing the structure, and improving the reliability of the transmission under impact conditions.

[0012] Optionally, in one embodiment of this application, obtaining the torsional stiffness of the target transmission and calculating the impact load inside the target transmission based on the torsional stiffness and the torsional angle of the transmission shaft system includes: obtaining the torsional stiffness of the shaft teeth inside the target transmission, and performing simulation calculations on the target transmission to convert the torsional stiffness of the shaft teeth to an equivalent value on the input shaft to obtain the torsional stiffness of the target transmission; multiplying the torsional stiffness and the torsional angle of the transmission shaft system to obtain the impact load inside the target transmission.

[0013] Based on the above-mentioned technical means, the embodiments of this application estimate the impact load inside the transmission by multiplying the torsional angle of the transmission shaft system by the torsional stiffness of the transmission. This enables precise quantification of the internal force of the transmission under impact conditions, accurate measurement of the internal impact load of the transmission, and improvement of the transmission's impact resistance and reliability.

[0014] A second aspect of this application provides a device for predicting the internal impact load of a transmission, comprising: an impact condition testing module for performing a preset impact condition test on a target transmission to acquire the input shaft speed and output shaft speed of the target transmission; a calculation module for calculating the speed ratio between the input shaft speed and the output shaft speed, calculating the equivalent speed of the input shaft based on the speed ratio, and calculating the transmission shaft torsional angle corresponding to the target transmission under the impact condition based on the equivalent speed of the input shaft; and a prediction module for obtaining the torsional stiffness of the target transmission and calculating the internal impact load of the target transmission based on the torsional stiffness and the transmission shaft torsional angle.

[0015] Optionally, in one embodiment of this application, the impact condition test module includes: a generation unit, configured to install preset Hall speed sensors on the housing directly above the input shaft and output shaft gears of the target transmission, respectively, to generate corresponding speed signals through the Hall speed sensors; a determination unit, configured to connect the speed signals to a preset data acquisition system and determine the speed acquisition requirements corresponding to the target transmission, so as to determine the sampling frequency and sampling duration corresponding to the target transmission according to the speed acquisition requirements; and an acquisition unit, configured to perform a preset impact condition test operation on the target transmission based on the sampling frequency and the sampling duration, to acquire speed pulse signals during the impact condition test, obtain the number of gear teeth corresponding to the target transmission, and use the number of gear teeth to perform data processing on the speed pulse signals to obtain the input shaft speed and the output shaft speed of the target transmission.

[0016] Optionally, in one embodiment of this application, the calculation module includes: a first calculation unit, configured to determine the impact duration of the target transmission, and based on the impact duration, perform an integral calculation on the equivalent rotational speed of the input shaft and the rotational speed of the output shaft to obtain the input shaft angle and the output shaft angle of the target transmission during the impact; a judgment unit, configured to determine whether the tooth surface of the power transmission gear inside the target transmission changes direction during the impact; and a processing unit, configured to, if the tooth surface of the power transmission gear changes direction, subtract the output shaft angle and the gear clearance inside the target transmission from the input shaft angle to obtain the corresponding transmission shaft torsion angle, otherwise subtract the output shaft angle from the input shaft angle to obtain the corresponding transmission shaft torsion angle.

[0017] Optionally, in one embodiment of this application, the estimation module includes: an equivalent unit, used to obtain the torsional stiffness of the shaft teeth inside the target transmission and to perform simulation calculations on the target transmission to convert the torsional stiffness of the shaft teeth to the input shaft to obtain the torsional stiffness of the target transmission; and a second calculation unit, used to multiply the torsional stiffness and the torsional angle of the transmission shaft system to obtain the impact load inside the target transmission.

[0018] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for predicting internal impact loads of a transmission as described in the above embodiments.

[0019] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for predicting internal impact loads in a transmission.

[0020] A fifth aspect of this application provides a computer program product, including a computer program that is executed to implement the above-described method for predicting internal impact loads in a transmission.

[0021] Therefore, the embodiments of this application have the following beneficial effects: The embodiments of this application can acquire the input shaft speed and output shaft speed of the target transmission by performing a preset impact condition test on the target transmission; calculate the speed ratio between the input shaft speed and the output shaft speed, and calculate the equivalent speed of the input shaft based on the speed ratio. Based on the equivalent speed of the input shaft, the torsional angle of the transmission shaft system corresponding to the target transmission under the impact condition is calculated; the torsional stiffness of the target transmission is obtained, and the impact load inside the target transmission is calculated based on the torsional stiffness and the torsional angle of the transmission shaft system. This application, by acquiring the speeds of the input and output shafts, calculating the torsional angle of the transmission shaft system under the impact condition, and performing calculations with the torque stiffness of the transmission, can predict the impact load inside the transmission, thereby providing reliable data and technical support for the strength design or failure analysis of the transmission shaft system and housing. This solves the problem that existing technologies cannot efficiently and accurately measure the impact load inside the transmission.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a method for predicting internal impact loads in a transmission according to an embodiment of this application; Figure 2 A schematic diagram of the installation position of a speed sensor provided in an embodiment of this application; Figure 3 This application provides a schematic diagram of the execution logic of a method for predicting internal impact loads in a transmission. Figure 4 This is an example diagram of a transmission internal impact load prediction device according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0024] Among them, 10-transmission internal impact load prediction device; 100-impact condition test module, 200-calculation module, 300-prediction module; 501-memory, 502-processor, 503-communication interface. Detailed Implementation

[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0026] The following description, with reference to the accompanying drawings, describes a method and apparatus for estimating the internal impact load of a transmission according to an embodiment of this application. Addressing the problems mentioned in the background section, this application provides a method for estimating the internal impact load of a transmission. In this method, a preset impact condition test is performed on a target transmission to collect the input shaft speed and output shaft speed; the speed ratio between the input shaft speed and output shaft speed is calculated, and the equivalent speed of the input shaft is calculated based on the speed ratio. Based on the equivalent speed of the input shaft, the torsional angle of the transmission shaft system corresponding to the target transmission under the impact condition is calculated; the torsional stiffness of the target transmission is obtained, and the internal impact load of the target transmission is calculated based on the torsional stiffness and the torsional angle of the transmission shaft system. This application estimates the internal impact load of the transmission by collecting the speeds of the input and output shafts, calculating the torsional angle of the transmission shaft system under the impact condition, and performing calculations with the torque stiffness of the transmission. This provides reliable data and technical support for the strength design or failure analysis of the transmission shaft system and housing. Therefore, it solves the problem that existing technologies cannot efficiently and accurately measure the internal impact load of a transmission.

[0027] Specifically, Figure 1 This is a flowchart illustrating a method for predicting internal impact loads in a transmission, as provided in an embodiment of this application.

[0028] like Figure 1 As shown, the method for predicting the internal impact load of the transmission includes the following steps: In step S101, a preset impact condition test is performed on the target transmission to collect the input shaft speed and output shaft speed of the target transmission.

[0029] The embodiments of this application first perform an impact condition test on the transmission to collect the input shaft speed and output shaft speed of the transmission, thereby providing reliable data guidance and basis for calculating the torsional angle of the transmission shaft system under impact conditions.

[0030] Optionally, in one embodiment of this application, a preset impact condition test is performed on the target transmission to collect the input shaft speed and output shaft speed of the target transmission. This includes: installing preset Hall speed sensors on the housing directly above the input shaft and output shaft gears of the target transmission to generate corresponding speed signals; connecting the speed signals to a preset data acquisition system and determining the speed acquisition requirements of the target transmission, thereby determining the sampling frequency and sampling duration of the target transmission based on the speed acquisition requirements; performing a preset impact condition test on the target transmission based on the sampling frequency and sampling duration to collect speed pulse signals during the impact condition test, obtaining the number of gear teeth of the target transmission, and using the number of gear teeth to process the speed pulse signals to obtain the input shaft speed and output shaft speed of the target transmission.

[0031] In practical implementation, this embodiment of the application can drill holes in the housing directly above the gears on the input and output shafts of the transmission to install Hall effect speed sensors, thereby accurately measuring the speed fluctuations of the input and output shafts. For transmissions with built-in speed sensors, the signal can also be directly led out and connected to a data acquisition system via wiring. The installation position of the speed sensor is as follows: Figure 2 As shown.

[0032] After the rotational speed signal is connected to the testing system, embodiments of this application can test the impact conditions that need to be analyzed. During testing, the data sampling frequency must not be too low to prevent insufficient accuracy of the measured rotational speed, which could lead to excessive errors in subsequent load analysis results. Simultaneously, the data acquisition duration must cover the entire process from before the impact occurs to the complete end of the impact.

[0033] After data acquisition is completed, embodiments of this application can process the measured rotational speed pulse signal using data analysis software based on the number of teeth of the gear being tested, to obtain the transmission input shaft rotational speed signal n. 输入 and transmission output shaft speed signal n 输出 .

[0034] Therefore, the embodiments of this application install Hall sensors at the input and output shaft gears of the target transmission, set the corresponding parameters as required to conduct impact condition tests, and calculate the input and output shaft speeds by combining the number of teeth of the tested gears, thereby accurately obtaining speed data under impact conditions, providing a reliable basis for transmission performance analysis and optimization, and improving test accuracy and efficiency.

[0035] In step S102, the speed ratio between the input shaft speed and the output shaft speed is calculated, and the equivalent speed of the input shaft is calculated based on the speed ratio. Based on the equivalent speed of the input shaft, the torsional angle of the transmission shaft system corresponding to the target transmission under the impact condition is calculated.

[0036] Furthermore, embodiments of this application can calculate the speed ratio between the input shaft and the output shaft, calculate the equivalent speed of the input shaft based on the speed ratio, and determine the torsional angle of the transmission shaft system under impact conditions based on the equivalent speed. This can accurately reflect the stress state of the transmission shaft system under impact conditions, provide data support for evaluating shaft strength and optimizing the structure, and improve the reliability of the transmission.

[0037] Optionally, in one embodiment of this application, calculating the transmission shaft torsion angle corresponding to the target transmission under impact conditions based on the equivalent rotational speed of the input shaft includes: determining the impact duration of the target transmission, and performing an integral operation on the equivalent rotational speed of the input shaft and the rotational speed of the output shaft based on the impact duration to obtain the input shaft rotation angle and the output shaft rotation angle of the target transmission during the impact; determining whether the tooth surface of the power transmission gear inside the target transmission reverses direction during the impact; if the tooth surface of the power transmission gear reverses direction, then subtracting the output shaft rotation angle and the gear clearance inside the target transmission from the input shaft rotation angle to obtain the corresponding transmission shaft torsion angle; otherwise, subtracting the output shaft rotation angle from the input shaft rotation angle to obtain the corresponding transmission shaft torsion angle.

[0038] Specifically, in the embodiments of this application, the output shaft speed calculated above can first be converted into the input shaft speed through the speed ratio between the input shaft and the output shaft, thus obtaining the output shaft speed n equivalent to the input shaft speed. 等效 n 等效 =n 输出 *i, where i is the speed ratio between the input shaft and the output shaft.

[0039] Secondly, embodiments of this application can obtain the input shaft rotation angle θ during the impact process by integrating the rotational speeds of the input and output shafts. 输入 With output shaft rotation angle θ 输出 , where θ 输入 = θ 输出 = t represents the duration of the impact process.

[0040] Finally, in the embodiments of this application, the internal shaft rotation angle θ of the transmission can be obtained by subtracting the output shaft rotation angle from the input shaft rotation angle. 轴系 As shown in the following formula: θ 轴系 =θ 输入 -θ 输出 It should be noted that the above formula is only applicable to impact conditions under constant gear meshing. If the gear teeth inside the transmission reverse direction during the impact process, the gear clearance inside the transmission needs to be subtracted.

[0041] Therefore, the embodiments of this application measure the rotational speeds of the input and output shafts of the transmission using a speed sensor, and calculate the torsional angle of the transmission shaft system by integrating and subtracting the results. This accurately reflects the force and deformation of the transmission shaft system during the impact process, providing a reliable basis for evaluating the gear meshing state and optimizing the structure, and improving the reliability of the transmission under impact conditions. In step S103, the torsional stiffness of the target transmission is obtained, and the impact load inside the target transmission is calculated based on the torsional stiffness and the torsional angle of the transmission shaft system.

[0042] After calculating the torsional angle of the transmission shaft system under impact conditions, as follows: Figure 3 As shown, embodiments of this application can utilize the torsional angle and the torque stiffness of the transmission to perform corresponding calculations to predict the impact load inside the transmission, thereby providing reliable data support for the strength design of the transmission shaft system and housing or the analysis of the causes of failure problems.

[0043] Optionally, in one embodiment of this application, obtaining the torsional stiffness of the target transmission and calculating the impact load inside the target transmission based on the torsional stiffness and the torsional angle of the transmission shaft system includes: obtaining the torsional stiffness of the shaft teeth inside the target transmission and performing simulation calculations on the target transmission to convert the torsional stiffness of the shaft teeth to the input shaft to obtain the torsional stiffness of the target transmission; multiplying the torsional stiffness and the torsional angle of the transmission shaft system to obtain the impact load inside the target transmission.

[0044] It should be noted that, in the embodiments of this application, the torsional stiffness of the internal shaft teeth of the transmission can be equivalently applied to the input shaft through simulation calculation to obtain the torsional stiffness K of the transmission. 输入 Subsequently, in this embodiment of the application, the torsional angle θ of the internal shaft system of the transmission under impact conditions can be used as a reference. 轴系 The internal impact torque T of the transmission is calculated using the following formula. 冲击 : T 冲击 =K 输入* θ 轴系 .

[0045] Therefore, the embodiments of this application estimate the internal impact load of the transmission by multiplying the torsional angle of the transmission shaft system by the torsional stiffness of the transmission, thereby accurately quantifying the internal force of the transmission under impact conditions, accurately measuring the internal impact load of the transmission, and improving the transmission's impact resistance and reliability.

[0046] According to the transmission internal impact load prediction method proposed in this application, a preset impact condition test is performed on the target transmission to collect the input shaft speed and output shaft speed; the speed ratio between the input shaft speed and output shaft speed is calculated, and the equivalent speed of the input shaft is calculated based on the speed ratio. Based on the equivalent speed of the input shaft, the torsional angle of the transmission shaft system corresponding to the target transmission under the impact condition is calculated; the torsional stiffness of the target transmission is obtained, and the internal impact load of the target transmission is calculated based on the torsional stiffness and the torsional angle of the transmission shaft system. This application predicts the internal impact load of the transmission by collecting the speeds of the input and output shafts, calculating the torsional angle of the transmission shaft system under the impact condition, and performing calculations with the torque stiffness of the transmission. This provides reliable data and technical support for the strength design or failure cause analysis of the transmission shaft system and housing.

[0047] Secondly, the internal impact load prediction device for a transmission according to an embodiment of this application is described with reference to the accompanying drawings.

[0048] Figure 4 This is a block diagram of a transmission internal impact load prediction device according to an embodiment of this application.

[0049] like Figure 4 As shown, the internal impact load prediction device 10 of the transmission includes: an impact condition test module 100, a calculation module 200, and a prediction module 300.

[0050] The impact condition test module 100 is used to perform a preset impact condition test on the target transmission in order to collect the input shaft speed and output shaft speed of the target transmission.

[0051] The calculation module 200 is used to calculate the speed ratio between the input shaft speed and the output shaft speed, calculate the equivalent speed of the input shaft based on the speed ratio, and calculate the torsional angle of the transmission shaft system corresponding to the target transmission under impact conditions based on the equivalent speed of the input shaft.

[0052] The estimation module 300 is used to obtain the torsional stiffness of the target transmission and calculate the impact load inside the target transmission based on the torsional stiffness and the torsional angle of the transmission shaft system.

[0053] Optionally, in one embodiment of this application, the impact condition testing module 100 includes: a generation unit, a determination unit, and a data acquisition unit.

[0054] The generation unit is used to install preset Hall speed sensors on the housing directly above the input shaft and output shaft gears of the target transmission, respectively, so as to generate corresponding speed signals through the Hall speed sensors.

[0055] The determination unit is used to connect the speed signal to a preset data acquisition system and determine the speed acquisition requirements of the target transmission, so as to determine the sampling frequency and sampling duration of the target transmission according to the speed acquisition requirements.

[0056] The acquisition unit is used to perform a preset impact condition test on the target transmission based on the sampling frequency and sampling duration, so as to acquire the speed pulse signal during the impact condition test, obtain the number of gear teeth corresponding to the target transmission, and use the number of gear teeth to process the speed pulse signal to obtain the input shaft speed and output shaft speed of the target transmission.

[0057] Optionally, in one embodiment of this application, the calculation module 200 includes: a first arithmetic unit, a judgment unit, and a processing unit.

[0058] The first calculation unit is used to determine the impact duration of the target transmission and, based on the impact duration, to perform integral calculations on the equivalent speed of the input shaft and the speed of the output shaft to obtain the input shaft angle and the output shaft angle of the target transmission during the impact process.

[0059] The judgment unit is used to determine whether the tooth surface of the power transmission gear inside the target gearbox changes direction during the impact process.

[0060] The processing unit is used to obtain the corresponding transmission shaft torsion angle by subtracting the output shaft angle and the gear clearance inside the target transmission from the input shaft angle if the tooth surface of the power transmission gear changes direction; otherwise, it obtains the corresponding transmission shaft torsion angle by subtracting the output shaft angle from the input shaft angle.

[0061] Optionally, in one embodiment of this application, the estimation module 300 includes: an equivalent unit and a second arithmetic unit.

[0062] The equivalent element is used to obtain the torsional stiffness of the shaft teeth inside the target transmission and to perform simulation calculations on the target transmission so as to convert the torsional stiffness of the shaft teeth to the input shaft in order to obtain the torsional stiffness of the target transmission.

[0063] The second calculation unit is used to multiply the torsional stiffness and the torsional angle of the transmission shaft system to obtain the impact load inside the target transmission.

[0064] It should be noted that the foregoing explanation of the embodiment of the method for predicting internal impact loads of the transmission also applies to the transmission internal impact load prediction device of this embodiment, and will not be repeated here.

[0065] The transmission internal impact load prediction device proposed in this application includes an impact condition testing module 100, used to perform a preset impact condition test on the target transmission to collect the input shaft speed and output shaft speed of the target transmission; a calculation module 200, used to calculate the speed ratio between the input shaft speed and the output shaft speed, and calculate the equivalent speed of the input shaft based on the speed ratio, and calculate the transmission shaft torsional angle corresponding to the target transmission under the impact condition based on the equivalent speed of the input shaft; and a prediction module 300, used to obtain the torsional stiffness of the target transmission, and calculate the internal impact load of the target transmission based on the torsional stiffness and the transmission shaft torsional angle. This application predicts the internal impact load of the transmission by collecting the speeds of the input and output shafts, calculating the torsional angle of the transmission shaft system under the impact condition, and performing calculations with the torque stiffness of the transmission, thereby providing reliable data and technical support for the strength design or failure cause analysis of the transmission shaft system and housing.

[0066] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0067] When the processor 502 executes the program, it implements the method for predicting the internal impact load of the transmission provided in the above embodiments.

[0068] Furthermore, electronic devices also include: Communication interface 503 is used for communication between memory 501 and processor 502.

[0069] The memory 501 is used to store computer programs that can run on the processor 502.

[0070] Memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0071] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0072] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0073] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0074] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for predicting internal impact loads in a transmission.

[0075] This application also provides a computer program product, including a computer program, which, when executed, is used to implement the above-described method for predicting internal impact loads in a transmission.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0079] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0080] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0081] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0082] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0083] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for predicting internal impact loads in a transmission, characterized in that, Includes the following steps: A preset impact condition test was performed on the target transmission to collect the input shaft speed and output shaft speed of the target transmission; Calculate the speed ratio between the input shaft speed and the output shaft speed, calculate the equivalent speed of the input shaft based on the speed ratio, and calculate the transmission shaft torsion angle corresponding to the target transmission under impact conditions based on the equivalent speed of the input shaft. The torsional stiffness of the target transmission is obtained, and the impact load inside the target transmission is calculated based on the torsional stiffness and the torsional angle of the transmission shaft system.

2. The method for predicting internal impact loads in a transmission according to claim 1, characterized in that, The step of performing a preset impact condition test on the target transmission to collect the input shaft speed and output shaft speed of the target transmission includes: Pre-set Hall speed sensors are installed on the housing directly above the input shaft and output shaft gears of the target transmission, respectively, so as to generate corresponding speed signals through the Hall speed sensors; The speed signal is connected to a preset data acquisition system, and the speed acquisition requirements corresponding to the target transmission are determined, so as to determine the sampling frequency and sampling duration corresponding to the target transmission based on the speed acquisition requirements; Based on the sampling frequency and the sampling duration, a preset impact condition test operation is performed on the target transmission to collect the speed pulse signal during the impact condition test, and to obtain the number of gear teeth corresponding to the target transmission. The speed pulse signal is then processed using the number of gear teeth to obtain the input shaft speed and the output shaft speed of the target transmission.

3. The method for predicting internal impact loads in a transmission according to claim 1, characterized in that, The calculation of the transmission shaft torsional angle corresponding to the target transmission under impact conditions based on the equivalent rotational speed of the input shaft includes: The impact duration of the target transmission is determined, and based on the impact duration, the equivalent rotational speed of the input shaft and the rotational speed of the output shaft are integrated to obtain the input shaft rotation angle and output shaft rotation angle of the target transmission during the impact process; Determine whether the tooth surfaces of the power transmission gears inside the target transmission change direction during the impact process; If the gear teeth of the power transmission gear reverse direction, the corresponding transmission shaft torsion angle is obtained by subtracting the output shaft angle and the gear clearance inside the target transmission from the input shaft angle; otherwise, the corresponding transmission shaft torsion angle is obtained by subtracting the output shaft angle from the input shaft angle.

4. The method for predicting internal impact loads in a transmission according to claim 1, characterized in that, The step of obtaining the torsional stiffness of the target transmission and calculating the impact load inside the target transmission based on the torsional stiffness and the torsional angle of the transmission shaft system includes: The torsional stiffness of the shaft teeth inside the target transmission is obtained, and the target transmission is simulated and calculated to convert the torsional stiffness of the shaft teeth to the input shaft in order to obtain the torsional stiffness of the target transmission. The torsional stiffness and the torsional angle of the transmission shaft system are multiplied to obtain the impact load inside the target transmission.

5. A device for predicting internal impact loads in a transmission, characterized in that, include: The impact condition test module is used to perform a preset impact condition test on the target transmission to collect the input shaft speed and output shaft speed of the target transmission; The calculation module is used to calculate the speed ratio between the input shaft speed and the output shaft speed, calculate the equivalent speed of the input shaft based on the speed ratio, and calculate the transmission shaft torsion angle corresponding to the target transmission under impact conditions based on the equivalent speed of the input shaft. The estimation module is used to obtain the torsional stiffness of the target transmission and calculate the impact load inside the target transmission based on the torsional stiffness and the torsional angle of the transmission shaft system.

6. The transmission internal impact load prediction device according to claim 5, characterized in that, The impact condition testing module includes: The generation unit is used to install preset Hall speed sensors on the housing directly above the input shaft and output shaft gears of the target transmission, respectively, so as to generate corresponding speed signals through the Hall speed sensors; The determining unit is used to connect the speed signal to a preset data acquisition system and determine the speed acquisition requirements corresponding to the target transmission, so as to determine the sampling frequency and sampling duration corresponding to the target transmission based on the speed acquisition requirements; The acquisition unit is used to perform a preset impact condition test on the target transmission based on the sampling frequency and the sampling duration, so as to acquire the speed pulse signal during the impact condition test, obtain the number of gear teeth corresponding to the target transmission, and use the number of gear teeth to process the speed pulse signal to obtain the input shaft speed and the output shaft speed of the target transmission.

7. The transmission internal impact load prediction device according to claim 5, characterized in that, The computing module includes: The first calculation unit is used to determine the impact duration of the target transmission, and based on the impact duration, to perform an integral calculation on the equivalent rotational speed of the input shaft and the rotational speed of the output shaft to obtain the input shaft rotation angle and the output shaft rotation angle of the target transmission during the impact process; The judgment unit is used to determine whether the tooth surface of the power transmission gear inside the target transmission changes direction during the impact process; The processing unit is configured to, if the tooth surface of the power transmission gear changes direction, subtract the output shaft angle and the gear clearance inside the target transmission from the input shaft angle to obtain the corresponding transmission shaft torsion angle; otherwise, subtract the output shaft angle from the input shaft angle to obtain the corresponding transmission shaft torsion angle.

8. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the method for predicting internal impact loads of a transmission as described in any one of claims 1-4.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the method for predicting internal impact loads of a transmission as described in any one of claims 1-4.

10. A computer program product, comprising a computer program, characterized in that, The computer program is executed to implement the method for predicting internal impact loads of a transmission as described in any one of claims 1-4.

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