Method and device for acquiring wear life of friction plate, storage medium and vehicle

Abstract

The invention provides a friction plate wear life obtaining method and device, a storage medium and a vehicle, friction plates are used for a transfer case of the vehicle, the transfer case comprises a front axle output shaft, a rear axle output shaft and a differential lock, the differential lock comprises at least two friction plates, and the differential lock is connected with the front axle output shaft and the rear axle output shaft. The at least two friction plates are combined to enable the rotating speed of the front axle output shaft and the rotating speed of the rear axle output shaft to be synchronous. The wear life obtaining method comprises the steps that the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft are obtained; according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft, first sliding friction work of a friction plate is obtained; acquiring the wear rate of the friction plate; and obtaining the wear life of the friction plate according to the first sliding wear work of the friction plate and the wear rate of the friction plate. According to the invention, the wear life of the friction plate is accurately obtained, so that a user can timely prevent wear of the friction plate, and the situation that a vehicle cannot get out of trouble at a critical moment is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of vehicles, and specifically proposes a method, a device, a storage medium and a vehicle for acquiring the wear life of a friction plate. Background Art

[0002] At present, among the relevant technologies, the articulated truck limited-slip transfer case is the first transfer case applied to articulated trucks, which realizes the differential lock through the interlocking of friction plates. When the front axle output shaft and the rear axle output shaft produce a differential, the friction plates are combined to synchronize the speeds of the front axle output shaft and the rear axle output shaft, thus ensuring the power output of the whole vehicle under the escape condition.

[0003] Because the friction plates will wear out due to mutual sliding during the synchronization process, when the friction plates are worn excessively, the speed of the front axle output shaft and the rear axle output shaft cannot be synchronized, affecting the power output and the vehicle's driving. Therefore, it is necessary to evaluate the wear life of the friction plates of this type of transfer case and to maintain and replace the friction plates in advance to prevent the vehicle from losing the ability to escape at a critical moment. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present invention provides a method for obtaining the wear life of a friction plate.

[0006] A second aspect of the present invention provides a device for obtaining the wear life of a friction plate.

[0007] A third aspect of the present invention provides another device for obtaining the wear life of a friction plate.

[0008] A fourth aspect of the present invention provides a readable storage medium.

[0009] A fifth aspect of the present invention provides a vehicle.

[0010] In view of this, a first aspect of the present invention provides a method for obtaining the wear life of a friction plate, wherein the friction plate is used for a transfer case of a vehicle, the transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock, the differential lock includes at least two friction plates, the differential lock is connected to the front axle output shaft and the rear axle output shaft, and the at least two friction plates are combined to synchronize the rotational speeds of the front axle output shaft and the rear axle output shaft, and the method for obtaining the wear life includes: obtaining the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft; obtaining the first sliding friction work of the friction plate according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft; obtaining the wear rate of the friction plate; obtaining the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0011] The method for obtaining the wear life of the friction plate proposed in the present invention is used to obtain the wear life of the friction plate of the transfer case of a vehicle. The transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock. The transfer case is a transmission component of the vehicle. The function of the transfer case is to distribute the power of the engine and output it to the front axle and the rear axle, or to output it to the front axle and the rear axle at the same time. Through the transfer case, the driver can select a driving mode according to the road conditions, such as two-wheel drive or four-wheel drive.

[0012] The front axle output shaft and the rear axle output shaft are components that connect the transfer case to the front and rear axles of the vehicle. Specifically, the front axle output shaft connects the transfer case and the front axle of the vehicle, and the rear axle output shaft connects the transfer case and the rear axle of the vehicle. The front axle output shaft and the rear axle output shaft are responsible for transferring power from the transfer case to the front and rear axles, and then driving the wheels.

[0013] The differential lock includes at least two friction plates, and the locking function is achieved by combining the friction plates.

[0014] The differential lock is connected to the front axle output shaft and the rear axle output shaft, and at least two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft.

[0015] Specifically, when there are two friction plates, one friction plate is connected to the front axle output shaft, and the other friction plate is connected to the rear axle output shaft. The two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft through friction. As the use time increases, the friction plate will gradually wear out, so it is important to obtain the wear life of the friction plate.

[0016] The method for obtaining the wear life of the friction plate proposed by the present invention first obtains the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft. Specifically, the equivalent inertia refers to the measure of the property of an object resisting changing its rotational state when rotating. The equivalent inertia of the front axle output shaft refers to the magnitude of the inertia of the front axle output shaft when rotating, and the equivalent inertia of the rear axle output shaft refers to the magnitude of the inertia of the rear axle output shaft when rotating.

[0017] After the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft are obtained, the first sliding friction work of the friction plate is obtained according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft.

[0018] Obtain the wear rate of the friction plate. The wear rate refers to the degree of wear of the friction plate per unit time or per unit distance.

[0019] After the first sliding friction work and the wear rate are obtained, the wear life of the friction plate is obtained according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0020] The present invention specifically and in detail determines the wear life of the friction plate, so that the user of the hinge truck can prevent the wear of the friction plate and replace it in time, and prevent the hinge truck from being unable to escape at a critical moment.

[0021] In addition, the method for obtaining the wear life of the friction plate in the above technical solution provided by the present invention may also have the following additional technical features:

[0022] In some technical schemes of the present invention, optionally, the wear rate of the friction plate is obtained through a test bench, an inner friction sample plate and an outer friction sample plate, the test bench includes a drive assembly and an inertia disk, the drive assembly is connected to the inertia disk, the inertia disk is connected to the outer friction sample plate, the outer friction sample plate and the friction plate have the same initial parameters, and the wear rate of the friction plate is obtained, specifically including: controlling the drive assembly to operate so that the inner friction sample plate and the outer friction sample plate perform a preset number of combined braking; obtaining the wear thickness of the outer friction sample plate, the effective area of ​​the outer friction sample plate, the moment of inertia of the inertia disk and the angular velocity of the inertia disk; obtaining the wear rate of the friction plate according to the wear thickness of the outer friction sample plate, the effective area of ​​the outer friction sample plate, the moment of inertia of the inertia disk and the angular velocity of the inertia disk.

[0023] In some technical solutions of the present invention, optionally, obtaining the equivalent inertia of the front axle output shaft specifically includes: obtaining the equivalent inertia of the front axle output shaft according to the first rotational momentum of the front axle output shaft and the first angular velocity of the front axle output shaft; the calculation formula of the equivalent inertia of the front axle output shaft is:

[0024]

[0025] Among them, J 1 is the equivalent inertia of the front axle output shaft, E r1 is the first rotational momentum of the front axle output shaft, ω 1 is the first angular velocity of the front axle output shaft.

[0026] In some technical solutions of the present invention, optionally, the vehicle includes a tire, a wheel hub, a reducer and a drive shaft, and obtaining the equivalent inertia of the front axle output shaft specifically includes: obtaining the equivalent inertia of the front axle output shaft according to the rotational inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the rotational inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the rotational inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the rotational inertia of the drive shaft of the vehicle and the angular velocity of the drive shaft of the vehicle; the calculation formula of the equivalent inertia of the front axle output shaft is:

[0027]

[0028] Among them, J 1 is the equivalent inertia of the front axle output shaft, J w is the moment of inertia of a single tire of the vehicle, Jh is the moment of inertia of a single wheel hub of the vehicle, J s is the moment of inertia of the vehicle's transmission shaft, J f is the moment of inertia of the vehicle's reducer, ω 1 is the first angular velocity of the front axle output shaft, ω w is the angular velocity of the vehicle's tires, ω h is the angular velocity of the wheel hub of the vehicle, ω f is the angular velocity of the vehicle's reducer, ω s is the angular velocity of the vehicle's drive shaft.

[0029] In some technical solutions of the present invention, optionally, obtaining the equivalent inertia of the rear axle output shaft specifically includes: obtaining the equivalent inertia of the rear axle output shaft according to the first rotational momentum of the rear axle output shaft and the first angular velocity of the rear axle output shaft; the calculation formula of the equivalent inertia of the rear axle output shaft is:

[0030]

[0031] Among them, J 2 is the equivalent inertia of the rear axle output shaft, E r2 is the first rotational momentum of the rear axle output shaft, ω 2 is the first angular velocity of the rear axle output shaft.

[0032] In some technical solutions of the present invention, optionally, the vehicle includes a tire, a wheel hub, a reducer and a drive shaft, and obtaining the equivalent inertia of the rear axle output shaft specifically includes: obtaining the equivalent inertia of the rear axle output shaft according to the rotational inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the rotational inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the rotational inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the rotational inertia of the drive shaft of the vehicle and the angular velocity of the drive shaft of the vehicle, the mass of the vehicle, the speed increment of the vehicle during the friction plate engagement process and the first angular velocity of the rear axle output shaft; the calculation formula of the equivalent inertia of the rear axle output shaft is:

[0033]

[0034] Among them, J 2 is the equivalent inertia of the rear axle output shaft, J w is the moment of inertia of a single tire of the vehicle, J h is the moment of inertia of a single wheel hub of the vehicle, J s is the moment of inertia of the vehicle's transmission shaft, J f is the moment of inertia of the vehicle's reducer, ω 2 is the first angular velocity of the rear axle output shaft, ω w is the angular velocity of the vehicle's tires, ω h is the wheel angular velocity of the vehicle, ωf is the angular velocity of the vehicle's reducer, ω s is the angular velocity of the vehicle's drive shaft, Δv is the speed increment of the vehicle during the friction plate engagement process, and m is the mass of the vehicle.

[0035] In some technical schemes of the present invention, the transfer case also includes a speed change system, and the first sliding work of the friction plate is obtained according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft. Specifically, the first sliding work of the friction plate is obtained according to the equivalent inertia of the front axle output shaft, the equivalent inertia of the rear axle output shaft, the torque ratio of the transfer case, and the output angular velocity of the speed change system of the transfer case.

[0036] In some technical solutions of the present invention, optionally, the calculation formula of the first sliding work of the friction plate is:

[0037]

[0038] Where ΔW is the first sliding work of the friction plate, J 1 is the equivalent inertia of the front axle output shaft, J 2 is the equivalent inertia of the rear axle output shaft, K is the torque ratio of the transfer case, ω H is the output angular velocity of the transfer case’s transmission system, and Δω is the angular velocity increment.

[0039] In some technical schemes of the present invention, optionally, the wear life of the friction plate is obtained based on the first sliding friction work of the friction plate and the wear rate of the friction plate, specifically including: obtaining the single combined wear thickness of the friction plate based on the first sliding friction work of the friction plate and the wear rate of the friction plate; obtaining the wear life of the friction plate based on the single combined wear thickness of the friction plate, the allowable wear thickness of the friction plate and the combination frequency of the friction plate.

[0040] In some technical solutions of the present invention, optionally, the calculation formula of the wear life of the friction plate is:

[0041]

[0042] Where, T is the wear life of the friction plate, L is P is the allowable wear thickness of the friction plate, η is the engagement frequency of the friction plate, and ΔL is the single engagement wear thickness of the friction plate.

[0043] According to a second aspect of the present invention, the present invention proposes a device for obtaining the wear life of a friction plate, the friction plate is used for a transfer case of a vehicle, the transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock, the differential lock includes at least two friction plates, the differential lock is connected to the front axle output shaft and the rear axle output shaft, the at least two friction plates are combined to synchronize the rotational speeds of the front axle output shaft and the rear axle output shaft, the device for obtaining the wear life of the friction plate includes: a first processing unit, used to obtain the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft; a second processing unit, used to obtain the first sliding friction work of the friction plate according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft; a third processing unit, used to obtain the wear rate of the friction plate; a fourth processing unit, used to obtain the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0044] In the technical solution, the device for obtaining the wear life of the friction plate proposed by the present invention includes a first processing unit, a second processing unit, a third processing unit and a fourth processing unit, wherein the first processing unit obtains the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft, specifically, the equivalent inertia refers to the measure of the property of an object resisting changing its rotational state when rotating. The equivalent inertia of the front axle output shaft refers to the magnitude of the inertia of the front axle output shaft when rotating, and the equivalent inertia of the rear axle output shaft refers to the magnitude of the inertia of the rear axle output shaft when rotating.

[0045] After obtaining the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft, the second processing unit obtains the first sliding friction work of the friction plate according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft.

[0046] Sliding friction work refers to the work done by the friction plate during the sliding process, reflecting the energy loss of the friction plate during the engagement. The first sliding friction work refers to the single maximum sliding friction work that the friction plate may bear during a locking process. The first sliding friction work is an important parameter for evaluating the life of the friction plate.

[0047] The third processing unit obtains the wear rate of the friction plate, where the wear rate refers to the degree of wear of the friction plate within a unit time or a unit distance.

[0048] After obtaining the first sliding friction work and the wear rate, the fourth processing unit obtains the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0049] The present invention specifically and in detail evaluates the wear life of the friction plate, so that the user of the hinge truck can prevent the wear of the friction plate and replace it in time, and prevent the hinge truck from being unable to escape at a critical moment.

[0050] According to the third aspect of the present invention, in some technical schemes of the present invention, optionally, another device for obtaining the wear life of a friction plate is proposed, comprising a memory and a processor, wherein the memory stores programs or instructions that can be run on the processor, and when the processor executes the program or instructions, the steps of the method for obtaining the wear life of the friction plate in any of the above-mentioned technical schemes are implemented.

[0051] In this technical scheme, the device for obtaining the wear life of the friction plate proposed in the present invention implements the steps of the method for obtaining the wear life of the friction plate in any of the above-mentioned technical schemes when the processor executes the program or instructions, and therefore has all the beneficial effects of the method for obtaining the wear life of the friction plate in any of the above-mentioned technical schemes.

[0052] According to the fourth aspect of the present invention, in some technical solutions of the present invention, optionally, a readable storage medium is proposed, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the method for obtaining the wear life of the friction plate as in any of the above-mentioned technical solutions are implemented.

[0053] In this technical solution, the readable storage medium proposed by the present invention implements the steps of the method for obtaining the wear life of the friction plate in any of the above-mentioned technical solutions when the program or instructions are executed by the processor, so it has all the beneficial effects of the method for obtaining the wear life of the friction plate in any of the above-mentioned technical solutions.

[0054] According to a fifth aspect of the present invention, in some technical solutions of the present invention, optionally, a vehicle is proposed, the vehicle comprising a device for acquiring the wear life of the friction plate or a readable storage medium as in the above technical solution.

[0055] In this technical solution, the vehicle proposed in the present invention includes a device for obtaining the wear life of the friction plate or a readable storage medium as in the above technical solution, and therefore has all the beneficial effects of the device for obtaining the wear life of the friction plate and the readable storage medium in the above technical solution.

[0056] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0058] Figure 1 One of the flow charts of a method for obtaining the wear life of a friction plate according to an embodiment of the present invention is shown;

[0059] Figure 2A second flow chart of a method for obtaining the wear life of a friction plate according to an embodiment of the present invention is shown;

[0060] Figure 3 A third flow chart of a method for obtaining the wear life of a friction plate according to an embodiment of the present invention is shown;

[0061] Figure 4 A schematic structural diagram of a device for obtaining the wear life of a friction plate according to an embodiment of the present invention is shown;

[0062] Figure 5 A schematic structural diagram of a device for obtaining the wear life of a friction plate according to an embodiment of the present invention is shown;

[0063] Figure 6 A schematic block diagram of the use of a test bench according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0064] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0065] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0066] Refer to the following Figures 1 to 6 A method for obtaining the wear life of a friction plate, a device for obtaining the wear life of a friction plate, a device for obtaining the wear life of a friction plate, a readable storage medium, and a vehicle according to some embodiments of the present invention are described.

[0067] like Figure 1 FIG. 1 shows one of the flow charts of a method for obtaining the wear life of a friction plate in one embodiment of the present invention. In this embodiment, the method for obtaining the wear life of a friction plate proposed by the present invention includes:

[0068] S102: Obtaining the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft;

[0069] S104: Obtaining a first sliding friction work of the friction plate according to an equivalent inertia of the front axle output shaft and an equivalent inertia of the rear axle output shaft;

[0070] S106: Obtaining the wear rate of the friction plate;

[0071] S108: Obtain the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0072] In this embodiment, the method for obtaining the wear life of the friction plate proposed by the present invention is used to obtain the wear life of the friction plate of the transfer case of the vehicle, and the transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock. The transfer case is a transmission component of the vehicle. The function of the transfer case is to distribute the power of the engine and output it to the front axle and the rear axle, or to output it to the front axle and the rear axle at the same time. Through the transfer case, the driver can select a driving mode according to the road conditions, such as two-wheel drive or four-wheel drive.

[0073] The front axle output shaft and the rear axle output shaft are components that connect the transfer case to the front and rear axles of the vehicle. Specifically, the front axle output shaft connects the transfer case and the front axle of the vehicle, and the rear axle output shaft connects the transfer case and the rear axle of the vehicle. The front axle output shaft and the rear axle output shaft are responsible for transferring power from the transfer case to the front and rear axles, and then driving the wheels.

[0074] The differential lock includes at least two friction plates, and the locking function is achieved by combining the friction plates. The differential lock is connected to the front axle output shaft and the rear axle output shaft, and at least two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft.

[0075] Specifically, when there are two friction plates, one friction plate is connected to the front axle output shaft, and the other friction plate is connected to the rear axle output shaft. The two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft through friction.

[0076] Specifically, the transfer case is an articulated transfer case, which is an important component in an articulated truck. It is responsible for distributing the power of the engine to different output shafts, such as the front axle output shaft or the rear axle output shaft, and adjusting the speed difference of the wheels on both sides through the differential lock to adapt to different road conditions and load requirements.

[0077] As the use time increases, the friction plate will gradually wear out, so it is important to obtain the wear life of the friction plate.

[0078] The method for obtaining the wear life of the friction plate proposed by the present invention first obtains the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft. Specifically, the equivalent inertia refers to the measure of the property of an object resisting changing its rotational state when rotating. The equivalent inertia of the front axle output shaft refers to the magnitude of the inertia of the front axle output shaft when rotating, and the equivalent inertia of the rear axle output shaft refers to the magnitude of the inertia of the rear axle output shaft when rotating.

[0079] After the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft are obtained, the first sliding friction work of the friction plate is obtained according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft.

[0080] Sliding friction work refers to the work done by the friction plate during the sliding process, reflecting the energy loss of the friction plate during the engagement. The first sliding friction work refers to the single maximum sliding friction work that the friction plate may bear during a locking process. The first sliding friction work is an important parameter for evaluating the life of the friction plate.

[0081] Obtain the wear rate of the friction plate. The wear rate refers to the degree of wear of the friction plate per unit time or per unit distance.

[0082] After the first sliding friction work and the wear rate are obtained, the wear life of the friction plate is obtained according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0083] The present invention specifically and in detail evaluates the wear life of the friction plate, so that the user of the hinge truck can prevent the wear of the friction plate and replace it in time, and prevent the hinge truck from being unable to escape at a critical moment.

[0084] like Figure 2 FIG. 1 shows a method for obtaining the wear life of an embodiment of the present invention, wherein the method for obtaining the wear life proposed by the present invention includes:

[0085] S202: Obtaining the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft;

[0086] S204: Obtaining a first sliding friction work of the friction plate according to an equivalent inertia of the front axle output shaft and an equivalent inertia of the rear axle output shaft;

[0087] S206: Control the driving assembly to operate so that at least the inner friction plate and the outer friction plate are braked in combination;

[0088] S208: After performing the combined braking for a preset number of times, obtaining the wear thickness of the outer friction sample plate, the effective area of ​​the outer friction sample plate, the moment of inertia of the inertia plate, and the angular velocity of the inertia plate;

[0089] S210: Obtaining the wear rate of the friction plate according to the wear thickness of the outer friction sample plate, the effective area of ​​the outer friction sample plate, the rotational inertia of the inertia plate, and the angular velocity of the inertia plate;

[0090] S212: Obtain the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0091] In this embodiment, since the volume of the transfer case is large and difficult to measure, an experiment can be designed to test the wear data of a single pair of coupled friction plates. Specifically, the wear rate of the friction plates can be obtained through a test bench, inner friction samples and outer friction samples. That is, the inner friction samples and outer friction samples are combined through the test bench to simulate the wear state, so as to evaluate the wear rate of the friction plates in the transfer case during actual use.

[0092] The test bench includes a drive assembly and an inertia disk, the drive assembly is connected to the inertia disk, the inertia disk is connected to the external friction sample, the initial parameters of the external friction sample and the friction plate are the same, the two are sheets of the same specifications and sizes and the same materials, and the steps of obtaining the wear rate of the friction plate specifically include:

[0093] Control the drive assembly to work. Specifically, first control the drive assembly to start, the drive assembly drives the inertia disk to rotate, and the inertia disk drives the outer friction sample to move. After reaching a stable speed, control the drive assembly to close, so that the outer friction sample connected to the inertia disk is combined with the inner friction sample.

[0094] The above process is repeated, and after a preset number of combined brakings, the wear thickness of the outer friction sample plate, the effective area of ​​the outer friction sample plate, the rotational inertia of the inertia plate, and the angular velocity of the inertia plate are obtained.

[0095] Specifically, the preset number of times is 2000 times.

[0096] Specifically, the wear thickness of the outer friction sample refers to the thickness of the friction sample that is gradually consumed and reduced due to the combined braking between the outer friction sample and the inner friction sample during use.

[0097] Specifically, the effective area of ​​the outer friction sample refers to the surface area of ​​the outer friction sample that actually participates in the friction action and generates friction force during the friction process.

[0098] Specifically, the inertia disk refers to a tool commonly used in dynamic testing and simulation, mainly used to simulate and replace the rotational inertia of actual components.

[0099] Specifically, the rotational inertia of the inertia disk refers to a physical quantity of the property of the inertia disk to resist changing its rotational state when rotating.

[0100] Specifically, the angular velocity of the inertia disk refers to the speed at which the inertia disk rotates.

[0101] The wear rate of the friction plate is obtained according to the wear thickness of the outer friction sample, the effective area of ​​the outer friction sample, the moment of inertia of the inertia plate and the angular velocity of the inertia plate. The present invention designs a test plan and an evaluation calculation method based on the physical properties and working rules of the friction plate, restores the real working conditions of the friction plate through the test bench and the friction sample, and evaluates the service life of the differential lock friction plate under the extreme working conditions on a specific articulated transfer case in a more specific and detailed manner, so that articulated truck customers can prevent the wear of the friction plate and replace it in time, and prevent the articulated truck from being unable to escape at a critical moment.

[0102] Specifically, when obtaining the wear rate, the following steps can be performed:

[0103] like Figure 6 As shown, the test bench is arranged. The drive assembly includes a drive motor and a clutch. The clutch is engaged, and the drive motor is started and the speed is stabilized to 1200r / min. The clutch is disconnected and the outer friction sample and the inner friction sample are engaged at the same time. The outer friction sample connected to the inertia plate is braked by the inner friction sample until the outer friction sample on the inertia plate stops rotating. After cooling to room temperature, the above operation is repeated.

[0104] The test was repeated 2000 times and the wear thickness of the external friction specimen was measured.

[0105] The wear rate is calculated. Specifically, the wear rate is calculated as follows: the effective wear area of ​​the wear sample multiplied by the wear thickness of the friction sample, divided by the moment of inertia of the inertia disk, divided by the square of the angular velocity, divided by 1000.

[0106] Specifically, before the test, the inner friction sample and the outer friction sample were run-in pretreatment, the loading pressure of the run-in pretreatment was 0.8Mpa, the input speed was 200r / min, and the run-in time was 30min. After the run-in, the friction sample was cleaned and lubricated with CD-20 or CN-40 or Mobil 12W-40 gear oil.

[0107] Specifically, the moment of inertia of the inertia disk is 2.76 kg·m 2 .

[0108] Specifically, the wear rate can also be obtained through the wear volume of the outer friction sample, the wear thickness of the outer friction sample and the effective wear area of ​​the outer friction sample.

[0109] In some embodiments of the present invention, optionally, obtaining the equivalent inertia of the front axle output shaft specifically includes: obtaining the equivalent inertia of the front axle output shaft according to a first rotational momentum of the front axle output shaft and a first angular velocity of the front axle output shaft.

[0110] In this embodiment, the method for obtaining the wear life proposed by the present invention, wherein obtaining the equivalent inertia of the front axle output shaft, specifically includes: obtaining the equivalent inertia of the front axle output shaft according to the first rotational momentum of the front axle output shaft and the first angular velocity of the front axle output shaft.

[0111] According to the first rotational momentum and the first angular velocity of the front axle output shaft, the equivalent inertia of the front axle output shaft can be obtained more conveniently, thereby increasing the speed of obtaining the wear life of the wear screen and improving the convenience of obtaining.

[0112] Specifically, the calculation formula for the equivalent inertia of the front axle output shaft is: Among them, J 1 is the equivalent inertia of the front axle output shaft, E r1 is the first rotational momentum of the front axle output shaft, ω 1 is the first angular velocity of the front axle output shaft.

[0113] In some embodiments of the present invention, optionally, the vehicle includes tires, wheels, reducers and drive shafts, and obtaining the equivalent inertia of the front axle output shaft specifically includes: obtaining the equivalent inertia of the front axle output shaft according to the rotational inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the rotational inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the rotational inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the rotational inertia of the drive shaft of the vehicle and the angular velocity of the drive shaft of the vehicle.

[0114] In this embodiment, the vehicle includes a wheel body, a wheel hub, a reducer and a transmission shaft, wherein the process of obtaining the equivalent inertia of the front axle output shaft may specifically include: obtaining the rotational inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the rotational inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the rotational inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the rotational inertia of the transmission shaft of the vehicle and the angular velocity of the transmission shaft of the vehicle. According to the above parameters, the equivalent inertia of the front axle output shaft is obtained.

[0115] The equivalent inertia of the front axle output shaft is obtained through the above parameters, which can ensure the accuracy of the obtained equivalent inertia of the front axle output shaft, and the measurement result conforms to the actual working conditions of the vehicle and the transmission.

[0116] Specifically, the calculation formula for the equivalent inertia of the front axle output shaft is:

[0117]

[0118] Among them, J 1 is the equivalent inertia of the front axle output shaft, J w is the moment of inertia of a single tire of the vehicle, J h is the moment of inertia of a single wheel hub of the vehicle, J fis the moment of inertia of the vehicle's reducer, J s is the moment of inertia of the vehicle's drive shaft, ω 1 is the first angular velocity of the front axle output shaft, ω w is the angular velocity of the vehicle's tires, ω h is the angular velocity of the wheel hub of the vehicle, ω f is the angular velocity of the vehicle's reducer, ω s is the angular velocity of the vehicle's drive shaft.

[0119] Specifically, the moment of inertia of a single tire of a vehicle refers to the amount by which a single tire of the vehicle resists changing its rotational state when rotating. Specifically, the moment of inertia of a single tire of a vehicle can be defined as a measure of the moment of inertia of the mass distribution of the tire about the axis of rotation when the tire rotates.

[0120] Specifically, the angular velocity of a tire of a vehicle refers to the angle at which the tire rotates around its axis per unit time.

[0121] Specifically, the moment of inertia of a single wheel hub of a vehicle refers to the amount by which the single wheel hub of the vehicle resists changing its rotational state when rotating.

[0122] Specifically, the angular velocity of a wheel hub of a vehicle refers to the angle at which the wheel hub rotates around its axis per unit time.

[0123] Specifically, the moment of inertia of a propeller shaft of a vehicle refers to a measure of the property of the propeller shaft to resist changing its rotational state while rotating.

[0124] Specifically, the angular velocity of the transmission shaft of a vehicle refers to the angle at which the transmission shaft rotates around its axis per unit time.

[0125] Specifically, the moment of inertia of a vehicle's reducer refers to the inertia measurement of the rotating parts on the reducer with respect to rotation.

[0126] Specifically, the angular velocity of the reducer of a vehicle refers to the angle at which the output shaft of the reducer rotates around its axis within a unit time.

[0127] In some embodiments of the present invention, optionally, obtaining the equivalent inertia of the rear axle output shaft specifically includes: obtaining the equivalent inertia of the rear axle output shaft according to a first rotational momentum of the rear axle output shaft and a first angular velocity of the rear axle output shaft.

[0128] In this embodiment, for the step of obtaining the equivalent inertia of the rear axle output shaft, the present invention is configured to obtain the equivalent inertia of the rear axle output shaft according to the first rotational momentum of the rear axle output shaft and the first angular velocity of the rear axle output shaft.

[0129] By means of the above setting for obtaining the equivalent inertia of the rear axle output shaft, the equivalent inertia of the rear axle output shaft can be obtained conveniently.

[0130] Specifically, the calculation formula for the equivalent inertia of the rear axle output shaft is:

[0131]

[0132] Among them, J 2 is the equivalent inertia of the rear axle output shaft, E r2 is the first rotational momentum of the rear axle output shaft, ω 2 is the first angular velocity of the rear axle output shaft.

[0133] Specifically, the first rotational momentum of the rear axle output shaft refers to a physical quantity of the rear axle output shaft resisting changing its rotational state when rotating.

[0134] Specifically, the first angular velocity of the rear axle output shaft refers to the angle of rotation around its axis in unit time.

[0135] In some embodiments of the present invention, optionally, the vehicle includes tires, wheels, reducers and drive shafts, and obtaining the equivalent inertia of the rear axle output shaft specifically includes: obtaining the equivalent inertia of the rear axle output shaft based on the rotational inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the rotational inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the rotational inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the rotational inertia of the drive shaft of the vehicle and the angular velocity of the drive shaft of the vehicle, the mass of the vehicle, the speed increment of the vehicle during the friction plate engagement process and the first angular velocity of the rear axle output shaft.

[0136] In this embodiment, the vehicle includes tires, wheels, reducers and drive shafts. For the process of obtaining the equivalent inertia of the rear axle output shaft, the present invention is specifically configured to: obtain the rotational inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the rotational inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the rotational inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the rotational inertia of the drive shaft of the vehicle and the angular velocity of the drive shaft of the vehicle, the mass of the vehicle, the speed increment of the vehicle during the friction plate engagement process and the first angular velocity of the rear axle output shaft.

[0137] The equivalent inertia of the rear axle output shaft is obtained based on the rotational inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the rotational inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the rotational inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the rotational inertia of the drive shaft of the vehicle and the angular velocity of the drive shaft of the vehicle, the mass of the vehicle, the speed increment of the vehicle during the friction plate engagement process and the first angular velocity of the rear axle output shaft.

[0138] The equivalent inertia of the rear axle output shaft is obtained according to the above parameters, which can ensure the accuracy of the equivalent inertia of the rear axle output shaft obtained, and the equivalent inertia result meets the actual working conditions of the vehicle and the transmission box.

[0139] Specifically, the calculation formula for the equivalent inertia of the rear axle output shaft is:

[0140]

[0141] Among them, J 2 is the equivalent inertia of the rear axle output shaft, J w is the moment of inertia of a single tire of the vehicle, J h is the moment of inertia of a single wheel hub of the vehicle, J f is the moment of inertia of the vehicle's reducer, J s is the moment of inertia of the vehicle's drive shaft, ω 2 is the first angular velocity of the rear axle output shaft, ω w is the angular velocity of the vehicle's tires, ω h is the wheel angular velocity of the vehicle, ω f is the angular velocity of the vehicle's reducer, ω s is the angular velocity of the vehicle's drive shaft, Δv is the speed increment of the vehicle during the friction plate engagement process, and m is the mass of the vehicle.

[0142] Specifically, Δv is the speed increment of the vehicle during the engagement of the friction plate, which can also be referred to as the speed increment of the vehicle during the engagement of the differential lock.

[0143] In some embodiments of the present invention, optionally, the transfer case also includes a speed change system, and the first sliding work of the friction plate is obtained according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft, specifically including: obtaining the first sliding work of the friction plate according to the equivalent inertia of the front axle output shaft, the equivalent inertia of the rear axle output shaft, the torque ratio of the transfer case, the output angular velocity of the speed change system of the transfer case and the angular velocity increments of the front axle output shaft and the rear axle output shaft.

[0144] In this embodiment, the transfer case further includes a transmission system, which includes components such as gears and a transmission device. The first sliding work of the friction plate can be obtained more accurately through the above parameters.

[0145] In some embodiments of the present invention, optionally, the calculation formula of the first sliding work of the friction plate is:

[0146]

[0147] Where ΔW is the first sliding work of the friction plate, J 1 is the equivalent inertia of the front axle output shaft, J 2 is the equivalent inertia of the rear axle output shaft, K is the torque ratio of the transfer case, ω H is the output angular velocity of the transfer case’s transmission system, and Δω is the angular velocity increment of the front axle output shaft and the rear axle output shaft.

[0148] In this embodiment, the formula for calculating the first sliding friction work of the friction plate is limited to achieve accurate calculation of the value of the first sliding friction work.

[0149] Specifically, the calculation formula of Δω is: 1 -ω 2 , where ω 1 is the first angular velocity of the front axle output shaft, ω 2 is the first angular velocity of the rear axle output shaft.

[0150] In some embodiments of the present invention, optionally, the transfer case also includes a speed change system to obtain the first sliding work of the friction plate, specifically including: obtaining the first friction work of the friction plate according to the equivalent inertia of the front axle output shaft, the first angular velocity of the front axle output shaft, the equivalent inertia of the rear axle output shaft, the first angular velocity of the rear axle output shaft and the output angular velocity of the speed change system of the transfer case.

[0151] In this embodiment, another method of obtaining the first friction work is defined, and the first friction work of the friction plate can be conveniently obtained through the above parameters.

[0152] Specifically, the calculation formula for the first sliding work of the friction plate is:

[0153]

[0154] Where ΔW is the first sliding work of the friction plate, J 1 is the equivalent inertia of the front axle output shaft, J 2 is the equivalent inertia of the rear axle output shaft ω 1 is the first angular velocity of the front axle output shaft, ω 2 is the first angular velocity of the rear axle output shaft, ω H is the output angular velocity of the transfer case's transmission system.

[0155] In some embodiments of the present invention, optionally, the wear life of the friction plate is obtained based on the first sliding friction work of the friction plate and the wear rate of the friction plate, specifically including: obtaining the single combined wear thickness of the friction plate based on the first sliding friction work of the friction plate and the wear rate of the friction plate; obtaining the wear life of the friction plate based on the single combined wear thickness of the friction plate, the allowable wear thickness of the friction plate and the combination frequency of the friction plate.

[0156] In this embodiment, the process of obtaining the wear life of the friction plate is limited, thereby achieving accurate determination of the wear life of the friction plate.

[0157] Specifically, the process of obtaining the single combined wear thickness of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate is, specifically, obtaining the single combined wear thickness of the friction plate according to the first sliding friction work of the friction plate, the wear rate of the friction plate and the effective wear area of ​​the outer friction sample plate.

[0158] In some embodiments of the present invention, optionally, the calculation formula of the wear life of the friction plate is:

[0159]

[0160] Where, T is the wear life of the friction plate, L is P is the allowable wear thickness of the friction plate, η is the engagement frequency of the friction plate, and ΔL is the single engagement wear thickness of the friction plate.

[0161] In this embodiment, the calculation formula for obtaining the wear life of the friction plate is limited. Through the above calculation formula, the wear life of the friction plate can be accurately obtained, so that the articulated truck customers can prevent the wear of the friction plate and replace it in time, preventing the articulated truck from being unable to escape at the critical moment.

[0162] Specifically, a calculation formula for calculating the single combined wear thickness of the friction plate is obtained based on the calculation formula of the wear rate.

[0163] The calculation formula of wear rate is: Among them, ΔL is the single combined wear thickness of the friction plate, G is the wear rate, ΔW is the first friction work, and S is the effective wear area of ​​the outer friction sample.

[0164] The calculation formula of the single combined wear thickness of the friction plate obtained by conversion is:

[0165] Among them, ΔL is the single combined wear thickness of the friction plate, G is the wear rate, ΔW is the first friction work, and S is the effective wear area of ​​the outer friction sample.

[0166] like Figure 3 FIG. 3 is a flow chart of a method for obtaining the wear life of a friction plate in an embodiment of the present invention, wherein the method for obtaining the wear life of a friction plate includes:

[0167] S302: Calculate the equivalent inertia of the entire vehicle;

[0168] S304: Calculate the single maximum sliding friction work;

[0169] S306: measuring the wear rate;

[0170] S308: Calculate the wear life.

[0171] In this embodiment, the method for obtaining the wear life of the friction plate proposed by the present invention first calculates the equivalent inertia of the whole vehicle, and then, according to the wear theory, the life of the differential lock friction plate is inversely proportional to the single sliding friction work, and the single maximum sliding friction work of the differential lock is determined and calculated. The sliding friction work is proportional to the equivalent inertia of the front and rear output shafts of the transfer case and the square increment of the angular velocity. Then, the wear rate is measured, and finally the wear life is calculated.

[0172] like Figure 4 As shown, in some embodiments of the present invention, optionally, a device 400 for obtaining the wear life of a friction plate is proposed, the friction plate is used for a transfer case of a vehicle, the transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock, the differential lock includes at least two friction plates, the differential lock is connected to the front axle output shaft and the rear axle output shaft, at least two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft, the device 400 for obtaining the wear life of the friction plate includes: a first processing unit 410, for obtaining the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft; a second processing unit 420, for obtaining the first sliding friction work of the friction plate according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft; a third processing unit 430, for obtaining the wear rate of the friction plate; a fourth processing unit 440, for obtaining the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0173] In this embodiment, the device 400 for obtaining the wear life of the friction plate proposed in the present invention is used to obtain the wear life of the friction plate of the transfer case of the vehicle. The transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock. The transfer case is a transmission component of the vehicle. The function of the transfer case is to distribute the power of the engine and output it to the front axle and the rear axle, or to output it to the front axle and the rear axle at the same time. Through the transfer case, the driver can select a driving mode according to the road conditions, such as two-wheel drive or four-wheel drive.

[0174] The front axle output shaft and the rear axle output shaft are components that connect the transfer case to the front and rear axles of the vehicle. Specifically, the front axle output shaft connects the transfer case and the front axle of the vehicle, and the rear axle output shaft connects the transfer case and the rear axle of the vehicle. The front axle output shaft and the rear axle output shaft are responsible for transferring power from the transfer case to the front and rear axles, and then driving the wheels.

[0175] The differential lock includes at least two friction plates, and the locking function is achieved by combining the friction plates.

[0176] The differential lock is connected to the front axle output shaft and the rear axle output shaft, and at least two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft.

[0177] Specifically, when there are two friction plates, one friction plate is connected to the front axle output shaft, and the other friction plate is connected to the rear axle output shaft. The two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft through friction. As the use time increases, the friction plate will gradually wear out, so it is important to obtain the wear life of the friction plate.

[0178] The device 400 for acquiring the wear life of the friction plate proposed in the present invention comprises a first processing unit 410, a second processing unit 420, a third processing unit 430 and a fourth processing unit 440, wherein the first processing unit 410 acquires the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft, specifically, the equivalent inertia refers to the measure of the property of an object resisting changing its rotational state when rotating. The equivalent inertia of the front axle output shaft refers to the magnitude of the inertia of the front axle output shaft when rotating, and the equivalent inertia of the rear axle output shaft refers to the magnitude of the inertia of the rear axle output shaft when rotating.

[0179] After obtaining the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft, the second processing unit 420 obtains the first sliding friction work of the friction plate according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft.

[0180] Sliding friction work refers to the work done by the friction plate during the sliding process, reflecting the energy loss of the friction plate during the engagement. The first sliding friction work refers to the single maximum sliding friction work that the friction plate may bear during a locking process. The first sliding friction work is an important parameter for evaluating the life of the friction plate.

[0181] The third processing unit 430 obtains the wear rate of the friction plate, where the wear rate refers to the degree of wear of the friction plate within a unit time or a unit distance.

[0182] After obtaining the first sliding friction work and the wear rate, the fourth processing unit 440 obtains the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

[0183] The present invention specifically and in detail evaluates the wear life of the friction plate, so that the users of the hinge truck can prevent the wear of the friction plate and replace it in time, and prevent the hinge truck from being unable to escape at a critical moment. Figure 5 As shown, in some embodiments of the present invention, optionally, another device 500 for obtaining the wear life of a friction plate is proposed, comprising a memory 510 and a processor 520, wherein the memory 510 stores programs or instructions that can be executed on the processor 520, and when the processor 520 executes the program or instructions, the steps of the method for obtaining the wear life of the friction plate in any of the above-mentioned embodiments are implemented.

[0184] In this embodiment, the device 500 for obtaining the wear life of the friction plate proposed in the present invention implements the steps of the method for obtaining the wear life of the friction plate in any of the above embodiments when the processor 520 executes the program or instruction, and therefore has all the beneficial effects of the method for obtaining the wear life of the friction plate in any of the above embodiments.

[0185] In some embodiments of the present invention, optionally, a readable storage medium is proposed, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the method for obtaining the wear life of the friction plate as in any of the above embodiments are implemented.

[0186] In this embodiment, the readable storage medium proposed by the present invention implements the steps of the method for obtaining the wear life of the friction plate in any of the above embodiments when the program or instructions are executed by the processor, so it has all the beneficial effects of the method for obtaining the wear life of the friction plate in any of the above embodiments.

[0187] In some embodiments of the present invention, optionally, a vehicle is proposed, the vehicle comprising a device for acquiring the wear life of the friction plate or a readable storage medium as in the above embodiments.

[0188] In this embodiment, the vehicle proposed by the present invention includes a device for obtaining the wear life of the friction plate or a readable storage medium as in the above embodiments, and therefore has all the beneficial effects of the device for obtaining the wear life of the friction plate and the readable storage medium in the above embodiments.

[0189] Specifically, the vehicle is an articulated vehicle, and specifically, the articulated vehicle includes an articulated truck, an articulated bulldozer or an articulated tank truck.

[0190] The present invention combines physical data measurement with theoretical calculation and analysis to provide a general evaluation method for the wear life of the friction plate on the limited slip transfer case of an articulated truck under each working condition. On a specific vehicle, only the design load parameters need to be substituted and measured according to the above test method to estimate the wear life of the limited slip transfer case in a relatively scientific manner. Considering that there is no corresponding friction plate life test plan and evaluation method for the existing limited slip transfer case differential lock, it is intended to design a test plan and evaluation calculation method based on the physical properties and working rules of the friction plate, restore the actual working conditions of the friction plate, and evaluate the service life of the differential lock friction plate under extreme working conditions on a specific articulated truck transfer case in a more specific and detailed manner, so that articulated truck customers can prevent friction plate wear and replace it in a timely manner, and prevent the articulated truck from being unable to escape at a critical moment.

[0191] In the claims, specification and drawings of the present invention, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, which is only for the purpose of more conveniently describing the present invention and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limiting the present invention; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0192] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0193] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for obtaining the wear life of a friction plate, characterized in that: The friction plate is used for a transfer case of a vehicle, the transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock, the differential lock includes at least two friction plates, the differential lock is connected to the front axle output shaft and the rear axle output shaft, at least two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft, and the method for obtaining the wear life includes: Obtaining the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft; acquiring a first sliding friction work of the friction plate according to an equivalent inertia of the front axle output shaft and an equivalent inertia of the rear axle output shaft; Obtaining the wear rate of the friction plate; The wear life of the friction plate is obtained according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

2. The method for obtaining the wear life of the friction plate according to claim 1, characterized in that: The wear rate of the friction plate is obtained by a test bench, an inner friction sample and an outer friction sample, wherein the test bench includes a drive assembly and an inertia plate, wherein the drive assembly is connected to the inertia plate, wherein the inertia plate is connected to the outer friction sample, and the outer friction sample has the same initial parameters as the friction plate. The wear rate of the friction plate is obtained, specifically including: Controlling the driving assembly to operate so that the inner friction plate and the outer friction plate are braked together for a preset number of times; Obtaining the wear thickness of the outer friction sample, the effective area of ​​the outer friction sample, the rotational inertia of the inertia disk, and the angular velocity of the inertia disk; The wear rate of the friction plate is obtained according to the wear thickness of the outer friction sample plate, the effective area of ​​the outer friction sample plate, the rotational inertia of the inertia plate and the angular velocity of the inertia plate.

3. The method for obtaining the wear life of the friction plate according to claim 1, characterized in that: The obtaining of the equivalent inertia of the front axle output shaft specifically includes: acquiring an equivalent inertia of the front axle output shaft according to a first rotational momentum of the front axle output shaft and a first angular velocity of the front axle output shaft; The calculation formula of the equivalent inertia of the front axle output shaft is: Wherein, J1 is the equivalent inertia of the front axle output shaft, E r1 is the first rotational momentum of the front axle output shaft, and ω1 is the first angular velocity of the front axle output shaft.

4. The method for obtaining the wear life of a friction plate according to claim 1 or 3, characterized in that: The vehicle includes a tire, a wheel hub, a reducer and a transmission shaft, and obtaining the equivalent inertia of the front axle output shaft specifically includes: Obtaining the equivalent inertia of the front axle output shaft according to the moment of inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the moment of inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the moment of inertia of the reducer of the vehicle, the moment of inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the moment of inertia of the transmission shaft of the vehicle, and the angular velocity of the transmission shaft of the vehicle; The calculation formula of the equivalent inertia of the front axle output shaft is: Wherein, J1 is the equivalent inertia of the front axle output shaft, J w is the moment of inertia of a single tire of the vehicle, J h is the moment of inertia of a single wheel hub of the vehicle, J f is the moment of inertia of the reducer of the vehicle, J s is the moment of inertia of the transmission shaft of the vehicle, ω1 is the first angular velocity of the front axle output shaft, ω w is the angular velocity of the tire of the vehicle, ω h is the angular velocity of the wheel hub of the vehicle, ω f is the angular velocity of the reducer of the vehicle, ω s is the angular velocity of the drive shaft of the vehicle.

5. The method for obtaining the wear life of the friction plate according to claim 1, characterized in that: Obtaining the equivalent inertia of the rear axle output shaft specifically includes: acquiring an equivalent inertia of the rear axle output shaft according to a first rotational momentum of the rear axle output shaft and a first angular velocity of the rear axle output shaft; The calculation formula of the equivalent inertia of the rear axle output shaft is: Wherein, J2 is the equivalent inertia of the rear axle output shaft, E r2 is the first rotational momentum of the rear axle output shaft, and ω2 is the first angular velocity of the rear axle output shaft.

6. The method for obtaining the wear life of a friction plate according to claim 1 or 5, characterized in that: The vehicle includes a tire, a wheel hub, a reducer and a transmission shaft, and obtaining the equivalent inertia of the rear axle output shaft specifically includes: Obtaining the equivalent inertia of the rear axle output shaft according to the moment of inertia of a single tire of the vehicle, the angular velocity of the tire of the vehicle, the moment of inertia of a single wheel hub of the vehicle, the angular velocity of the wheel hub of the vehicle, the moment of inertia of the reducer of the vehicle, the angular velocity of the reducer of the vehicle, the moment of inertia of the transmission shaft of the vehicle and the angular velocity of the transmission shaft of the vehicle, the mass of the vehicle, the speed increment of the vehicle during the friction plate engagement process, and the first angular velocity of the rear axle output shaft; The calculation formula of the equivalent inertia of the rear axle output shaft is: Wherein, J2 is the equivalent inertia of the rear axle output shaft, J w is the moment of inertia of a single tire of the vehicle, J h is the moment of inertia of a single wheel hub of the vehicle, J f is the moment of inertia of the reducer of the vehicle, J s is the moment of inertia of the vehicle's transmission shaft, ω2 is the first angular velocity of the rear axle output shaft, ω w is the angular velocity of the tire of the vehicle, ω h is the wheel angular velocity of the vehicle, ω f is the angular velocity of the vehicle's reducer, ω s is the angular velocity of the transmission shaft of the vehicle, Δv is the speed increment of the vehicle during the engagement process of the friction plate, and m is the mass of the vehicle.

7. The method for obtaining the wear life of the friction plate according to claim 1, characterized in that: The transfer case further includes a speed change system, wherein the first sliding friction work of the friction plate is obtained according to the equivalent inertia of the front axle output shaft and the equivalent inertia of the rear axle output shaft, specifically comprising: The first sliding work of the friction plate is obtained according to the equivalent inertia of the front axle output shaft, the equivalent inertia of the rear axle output shaft, the torque ratio of the transfer case, the output angular velocity of the transmission system of the transfer case, and the angular velocity increments of the front axle output shaft and the rear axle output shaft.

8. The method for obtaining the wear life of the friction plate according to claim 7, characterized in that: The calculation formula of the first sliding work of the friction plate is: Wherein, ΔW is the first sliding work of the friction plate, J1 is the equivalent inertia of the front axle output shaft, J2 is the equivalent inertia of the rear axle output shaft, K is the torque ratio of the transfer case, ω H is the output angular velocity of the transmission system of the transfer case, and Δω is the angular velocity increment of the front axle output shaft and the rear axle output shaft.

9. The method for obtaining the wear life of a friction plate according to claim 1, characterized in that: The obtaining the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate specifically includes: Obtaining a single combined wear thickness of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate; The wear life of the friction plate is obtained according to the single combined wear thickness of the friction plate, the allowable wear thickness of the friction plate and the combination frequency of the friction plate.

10. The method for obtaining the wear life of the friction plate according to claim 9, characterized in that: The calculation formula of the wear life of the friction plate is: Wherein, T is the wear life of the friction plate, L P is the allowable wear thickness of the friction plate, η is the engagement frequency of the friction plate, and ΔL is the single engagement wear thickness of the friction plate.

11. A device for obtaining the wear life of a friction plate, characterized in that: The friction plate is used for a transfer case of a vehicle, the transfer case includes a front axle output shaft, a rear axle output shaft and a differential lock, the differential lock includes at least two friction plates, the differential lock is connected to the front axle output shaft and the rear axle output shaft, at least two friction plates are combined to synchronize the rotation speeds of the front axle output shaft and the rear axle output shaft, and the wear life acquisition device includes: A first processing unit, used for obtaining an equivalent inertia of the front axle output shaft and an equivalent inertia of the rear axle output shaft; a second processing unit, configured to obtain a first sliding friction work of the friction plate according to an equivalent inertia of the front axle output shaft and an equivalent inertia of the rear axle output shaft; a third processing unit, configured to obtain a wear rate of the friction plate; The fourth processing unit is used to obtain the wear life of the friction plate according to the first sliding friction work of the friction plate and the wear rate of the friction plate.

12. A device for obtaining the wear life of a friction plate, characterized in that: include: A memory and a processor, wherein the memory stores a program or instruction that can be run on the processor, and when the processor executes the program or instruction, the steps of the method for obtaining the wear life of the friction plate as described in any one of claims 1 to 10 are implemented.

13. A readable storage medium having a program or instruction stored thereon, characterized in that: When the program or instruction is executed by a processor, the steps of the method for obtaining the wear life of the friction plate according to any one of claims 1 to 10 are implemented.

14. A vehicle, characterized in that: include: The device for obtaining the wear life of the friction plate according to claim 11 or 12; or The readable storage medium as claimed in claim 13.

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