Method of processing a transmission and transmission, non-transitory storage medium, and vehicle

Abstract

The application discloses a transmission processing method and transmission, a nonvolatile storage medium and a vehicle. The method comprises the following steps: acquiring motor parameters of a motor and a rotation speed ratio of a worm gear assembly; determining cam disc parameters of a cam disc based on the motor parameters and the rotation speed ratio; determining a transmission ratio between the cam disc and a driving cam by using a dynamics simulation model; and determining transmission parameters of the transmission based on the transmission ratio and the cam disc parameters, wherein the dynamics simulation model is a transmission established in a simulation environment. The application solves the technical problem of low accuracy of transmission parameters of a transmission calculated by an artificial method.

Description

Technical Field

[0001] This invention relates to the field of intelligent vehicles, and more specifically, to a method for processing a transmission device, a transmission device, a non-volatile storage medium, and a vehicle. Background Technology

[0002] Currently, internal combustion engine vehicles employ a transfer case within their transmission system to achieve four-wheel drive functionality. Power from the engine is transmitted through the transmission to the transfer case, which then distributes power to the front and rear axles. In two-wheel drive mode, power is directly transmitted to the rear axle. In four-wheel drive mode, the electronic control system controls the motor to rotate, driving the clutch actuator to engage the clutch and transferring a portion of the power to the front axle. When designing the motor selection and clutch transmission system, it is necessary to obtain the transmission parameters of the transmission system.

[0003] However, the traditional calculation of the relationship between motor torque and clutch push plate clamping force, and the relationship between motor rotation angle and clutch push plate axial displacement, relies on manual calculation, and the calculation process is relatively complicated, resulting in low efficiency of transmission parameters of the transmission transpose.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] The present invention provides a method for processing a transmission device, a transmission device, a non-volatile storage medium, and a vehicle, to at least solve the technical problem of low efficiency in manually calculating transmission parameters for transmission transfer.

[0006] According to one aspect of the present invention, a method for processing a transmission device is provided, comprising: acquiring motor parameters of a motor and the speed ratio of a worm gear assembly; determining cam disk parameters of a cam disk based on the motor parameters and the speed ratio; determining the transmission ratio between the cam disk and the driving cam using a dynamic simulation model; and determining the transmission parameters of the transmission device based on the transmission ratio and the cam disk parameters, wherein the dynamic simulation model is a transmission device established in a simulation environment.

[0007] Optionally, the motor parameters include: motor torque and motor rotation angle; the cam disk parameters include: cam disk torque and cam disk rotation angle; and the cam disk parameters are determined based on the motor parameters and speed ratio, including: determining the cam disk torque based on the motor torque, speed ratio, and meshing efficiency of the worm gear assembly; and determining the cam disk rotation angle based on the motor rotation angle and speed ratio.

[0008] Optionally, the transmission ratio includes: torque transmission ratio. The transmission ratio between the cam disk and the driving cam is determined using a dynamic simulation model, including: constructing a dynamic simulation model of the transmission device, wherein the dynamic simulation model includes at least: a driving cam model corresponding to the driving cam and a cam disk model corresponding to the cam disk; applying a preset torque to the driving cam model and applying a preset cam disk rotation angle to the cam disk model, and measuring the reaction torque of the cam disk model; and determining the torque transmission ratio based on the preset torque and the reaction torque.

[0009] Optionally, the transmission device further includes: a ball cam, which determines the transmission parameters of the transmission device based on the transmission ratio and the cam disk parameters, including: determining the driving cam torque of the driving cam based on the torque transmission ratio and the cam disk torque; determining the driving cam axial force of the driving cam based on the driving cam torque and the ball cam parameters of the ball cam; and determining the driving cam axial force as a transmission parameter.

[0010] Optionally, the transmission ratio includes: angular transmission ratio, which is determined using a dynamic simulation model, including: applying a preset cam disk rotation angle to the cam disk model, measuring the active cam rotation angle of the active cam, and determining the angular transmission ratio based on the preset cam disk rotation angle and the active cam rotation angle.

[0011] Optionally, the transmission ratio includes: an angular transmission ratio. The transmission parameters of the transmission device are determined based on the transmission ratio and the cam disk parameters, including: determining the active cam rotation angle of the active cam based on the angular transmission ratio and the cam disk rotation angle; determining the active cam axial displacement of the active cam based on the active cam rotation angle and the ball cam parameters; and determining the active cam axial displacement as a transmission parameter.

[0012] Optionally, the method further includes: establishing a first hinge pair model between the cam disk model and the active cam model; establishing a cam pair connection model of the helical rise surface of the cam disk model and the outer cylindrical surface of the active cam model; fixing a connecting pin model on the active cam model, and establishing a second hinge pair model between the bearing and pin models of the active cam model; generating a dynamic simulation model based on the cam disk model, the active cam model, the first hinge pair model, the cam pair connection model, the second hinge pair model, and the pin model.

[0013] According to another aspect of the present invention, a transmission device is also provided, comprising: a motor, a worm gear assembly, a cam disk, and a driving cam, including: an acquisition module for acquiring motor parameters of the motor and the speed ratio of the worm gear assembly; a first determination module for determining cam disk parameters of the cam disk based on the motor parameters and the speed ratio; a second determination module for determining the transmission ratio between the cam disk and the driving cam using a dynamic simulation model; and a third determination module for determining the transmission parameters of the transmission device based on the transmission ratio and the cam disk parameters, wherein the dynamic simulation model is a transmission device established in a simulation environment.

[0014] According to another aspect of the present invention, a non-volatile storage medium is also provided, the non-volatile storage medium including a stored program, wherein, when the program is running, it controls the processor of the device to execute the processing method of the transmission device described above.

[0015] According to another aspect of the present invention, a vehicle is also provided, comprising: one or more processors; a storage device for storing one or more programs; and, when the one or more programs are executed by the one or more processors, causing the one or more processors to perform the processing method of the transmission device described above.

[0016] In this embodiment of the invention, the motor parameters of the motor and the speed ratio of the worm gear assembly are obtained; the cam disk parameters of the cam disk are determined based on the motor parameters and the speed ratio; the transmission ratio between the cam disk and the driving cam is determined using a dynamic simulation model; and the transmission parameters of the transmission device are determined based on the transmission ratio and the cam disk parameters. It is worth noting that the dynamic simulation model can efficiently and accurately determine the transmission ratio between the cam disk and the driving cam, thereby determining the transmission parameters of the transmission device. This greatly improves the calculation speed and accuracy of the transmission parameters, achieving the goal of improving the efficiency of obtaining transmission parameters. Thus, the technical effect of determining the transmission parameters of the transmission device using a dynamic simulation model is realized, thereby solving the technical problem of low efficiency in manually calculating the transmission parameters of the transmission device. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a flowchart of a processing method for a transmission device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of an optional overall structure of an off-road transfer case clutch actuator according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the overall structure of an optional off-road transfer case clutch actuator according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of an optional off-road transfer case cam disc-drive cam (wishbone) reduction mechanism according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram illustrating an optional relationship between the torque transmission ratio and the cam disc rotation angle according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram illustrating the relationship between an optional angular transmission ratio and the cam disc rotation angle according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the processing procedure of an optional transmission device according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of a transmission device according to an embodiment of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] Example 1

[0029] According to an embodiment of the present invention, an embodiment of a processing method for a transmission device is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0030] Figure 1 This is a flowchart of a processing method for a transmission device according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0031] Step S102: Obtain the motor parameters of the motor and the speed ratio of the worm gear assembly.

[0032] The aforementioned motors can be machines that convert electrical energy into mechanical energy, or electromagnetic devices that convert or transmit electrical energy based on the law of electromagnetic induction, including but not limited to: DC motors and AC motors. Motor parameters can be some basic characteristics and performance indicators of the motor, including but not limited to: rated power, rated speed, and motor efficiency.

[0033] The aforementioned worm gear assembly can be a combination of worm gear devices that are stacked and coaxially arranged, including but not limited to: worm and gear. The speed ratio can be the ratio of the speeds of the worm gear and the worm.

[0034] In one optional embodiment, the onboard system monitors the vehicle's status information in real time, including wheel speed, throttle opening, braking status, steering wheel angle, and other information. Based on this vehicle status information, the system calculates or measures the motor parameters and the rotational speed ratio of the worm gear assembly.

[0035] In another optional embodiment, the transfer case controller reads the vehicle's status information from the Controller Area Network (CAN) bus, determines whether the vehicle needs four-wheel drive intervention based on the vehicle's status information, and controls the motor to work when four-wheel drive intervention is required, and monitors the data of the motor and its internal worm gear assembly in real time, thereby obtaining the motor parameters and the speed ratio of the worm gear assembly.

[0036] Step S104: Determine the cam disk parameters based on the motor parameters and speed ratio.

[0037] The aforementioned cam disk can be a disc-shaped component with a varying diameter that rotates around a fixed axis. The cam can be a component with a curved profile or groove, used for mechanical rotation or sliding. Cam disk parameters can be the main parameters of the cam disk mechanism, including but not limited to: cam disk torque and cam disk rotation angle. Cam disk torque can be the torque force generated by the camshaft controlling the opening and closing of the engine valves. Cam disk rotation angle can be the motion angle corresponding to the stroke of the moving part away from the cam's rotation center.

[0038] In one optional embodiment, after obtaining the motor parameters and speed ratio, the cam disc angle is calculated based on the motor rotation angle, the first-stage worm gear ratio, and the second-stage gear ratio. Furthermore, the cam disc torque is calculated based on the motor torque, the first-stage worm gear ratio, the second-stage gear ratio, the first-stage worm gear meshing efficiency, the second-stage gear meshing efficiency, and the bearing efficiency, thereby determining the cam disc parameters.

[0039] Step S106: Determine the transmission ratio between the cam disk and the driving cam using a dynamic simulation model.

[0040] The aforementioned dynamic simulation model can be a model established within a dynamic simulation environment. This simulation environment can be a virtual environment specifically designed to study various systems, simulating the real world. It can simulate physical environments and behaviors, allowing for the setting of different parameters, control of different variables, and monitoring and analysis of the system's operation. This enables the testing, verification, and improvement of the designed product or system. The driving cam can be the driving component of a cam, and can be, but is not limited to, a fork bearing. The transmission ratio can be the ratio of the transmission generated when the cam disc and the driving cam are driven.

[0041] In one optional embodiment, a dynamic simulation model is constructed, in which a preset torque is applied to the cam disk model and the active cam model, and the reaction torque of the cam disk model and the rotation angle of the active cam model are obtained by measurement or detection, thereby obtaining the torque transmission ratio or the rotation angle transmission ratio.

[0042] In another optional embodiment, a dynamic simulation model is constructed, and a preset constant torque M1 is applied to the center of the active cam model, and a preset constant cam disk rotation angle is applied to the center of the cam disk model. The reaction torque M2 at the center of the cam disk model is measured in the simulation environment. Based on the preset constant torque M1 applied to the center of the active cam model and the reaction torque M2 at the center of the cam disk model, the torque transmission ratio is obtained. Alternatively, a preset constant cam disk rotation angle is applied to the center of the cam disk model, and the active cam rotation angle at the center of the active cam model is measured to determine the rotation angle transmission ratio.

[0043] Step S108: Determine the transmission parameters of the transmission device based on the transmission ratio and cam disk parameters, wherein the dynamic simulation model is the transmission device established in the simulation environment.

[0044] The aforementioned transmission device can be an intermediate device that transmits power from the power unit to the working mechanism, or it can transmit power from the engine to the drive wheels of the car to generate driving force so that the car can travel at a certain speed. It can also be an off-road transfer case clutch actuator composed of a first-stage worm gear reduction mechanism, a second-stage gear reduction mechanism, a third-stage cam disc-drive cam (fork arm) reduction mechanism and a fourth-stage ball cam reduction mechanism, including but not limited to: ball cam, wherein the ball cam can be a convex arc surface cam with a circular arc rotation surface as the spherical surface.

[0045] The aforementioned transmission parameters can be data parameters generated by the transmission device during operation, including but not limited to: axial force of the drive cam and axial displacement of the drive cam. The axial force of the drive cam can be used to limit the axial movement of the drive camshaft or to withstand the axial force generated by gear transmission. The axial displacement of the drive cam can be the displacement generated by the movement of the drive cam along the shaft. By controlling the position of certain protrusions on the camshaft, the matching relationship between the intake (release) time and the required torque of the intake and exhaust pistons can be changed, achieving more efficient combustion and optimized performance output.

[0046] In one optional embodiment, when the transmission transpose is a ball cam, the driving cam torque is calculated based on the torque transmission ratio and the cam disk torque. The driving cam axial force is further determined based on the driving cam torque and the ball cam parameters. The ball cam parameters can be experimental data parameters related to the ball cam, including but not limited to: the ball cam raceway radius R, the ball cam helix lead angle α, the ball cam thrust bearing friction coefficient μ1, and the ball cam raceway friction coefficient μ2. The driving cam axial force is then determined as a transmission parameter.

[0047] When the transmission ratio is the angular transmission ratio, the rotation angle of the driving cam is calculated based on the angular transmission ratio and the rotation angle of the cam disc. The axial displacement of the driving cam is then calculated based on the rotation angle of the driving cam and the parameters of the ball cam, and the axial displacement of the driving cam is determined as the transmission parameter.

[0048] In another alternative embodiment, when the transmission transpose is a ball cam, the cam disk torque is input into the dynamic simulation model or other application calculation software. The active cam torque of the active cam model is calculated based on the torque transmission ratio and the cam disk torque. By comparing the calculated active cam torque with experimental data, the adjusted active cam torque can be input into the dynamic simulation model. The active cam axial force of the active cam model is calculated based on the active cam torque, the ball cam raceway radius R, the ball cam helix lead angle α, the ball cam thrust bearing friction coefficient μ1, and the ball cam raceway friction coefficient μ2, thereby determining the active cam axial force as the transmission parameter.

[0049] When the transmission ratio is an angular transmission ratio, the cam disk rotation angle is input into the dynamic simulation model or other application calculation software, and the driving cam rotation angle is calculated based on the angular transmission ratio. The calculated driving cam rotation angle is compared with experimental data, and the driving cam rotation angle can be adjusted according to actual conditions. The adjusted driving cam rotation angle is then input into the dynamic simulation model, and the axial displacement of the driving cam is calculated based on the driving cam rotation angle, the ball cam raceway radius, and the ball cam helix lead angle, thus determining the driving cam axial displacement as a transmission parameter.

[0050] Through the above steps, the following can be achieved: obtaining the motor parameters and the speed ratio of the worm gear assembly; determining the cam disk parameters based on the motor parameters and speed ratio; determining the transmission ratio between the cam disk and the driving cam using a dynamic simulation model; and determining the transmission parameters of the transmission device based on the transmission ratio and cam disk parameters. It is important to note that using a dynamic simulation model can efficiently and accurately determine the transmission ratio between the cam disk and the driving cam, thereby determining the transmission parameters of the transmission device. This significantly improves the calculation speed and accuracy of transmission parameters, achieving the goal of improving the efficiency of obtaining transmission parameters. This realizes the technical effect of using a dynamic simulation model to determine the transmission parameters of the transmission device, thus solving the technical problem of low efficiency in manually calculating the transmission parameters of the transmission device.

[0051] It should be noted that, Figure 2 This is a schematic diagram of an optional off-road transfer case clutch actuator structure according to an embodiment of the present invention. Figure 3 This is a schematic cross-sectional view of an optional off-road transfer case clutch actuator according to an embodiment of the present invention, as shown below. Figure 2 , Figure 3 As shown, the off-road transfer case clutch actuator consists of a motor 1, a worm gear 2, a first-stage driven gear 3, a second-stage driving gear 4, a second-stage driven gear 5, a cam disc 6, a driving cam assembly 7, a fixed cam 8, a steel ball 9, a clutch push plate 10, a shaft 11, and bearings 1201-1207.

[0052] When an off-road vehicle requires only two-wheel drive on a high-friction surface, the drive mode is rear-wheel drive, and motor 1 is in the mechanical zero position. The fork bearing 702 in the active cam assembly 7 is located in the recess in the cam disc 6. When the real-time control of the off-road vehicle's two-wheel drive to four-wheel drive conversion is completed by the transfer case controller, the transfer case controller obtains the vehicle's status information and determines whether the vehicle currently needs four-wheel drive intervention. When it is determined that four-wheel drive intervention is needed, the transfer case controller controls the bearing 1201 in the motor to rotate. The bearing can be a component supporting the active cam model, helping to distribute heavy loads, reducing the coefficient of friction during movement, and ensuring rotational accuracy. The bearing drives the worm gear 2, as well as the driven gear, the first-stage driven gear 3, the second-stage active gear 4, and the second-stage driven gear 5 to rotate successively, which in turn drives the cam disc 6 to rotate. The helical lifting surface 6a of the cam disc 6 pushes the active cam 701 of the active cam assembly 7 to rotate, thereby realizing the axial movement of the active cam.

[0053] in addition, Figure 4This is a schematic diagram of an optional off-road transfer case cam disc-drive cam (fork arm) reduction mechanism according to an embodiment of the present invention. Due to its unique fork arm 701b structure, it achieves a large transmission ratio while occupying less transfer case space. Since the fixed cam 8 is fixed, the drive cam 7 moves axially under the action of the steel ball 9 and the helical raceway 701b, pushing the push plate 10 through the thrust bearing 1207 to press the clutch and transmit torque to the front axle.

[0054] Optionally, the motor parameters include: motor torque and motor rotation angle; the cam disk parameters include: cam disk torque and cam disk rotation angle; and the cam disk parameters are determined based on the motor parameters and speed ratio, including: determining the cam disk torque based on the motor torque, speed ratio, and meshing efficiency of the worm gear assembly; and determining the cam disk rotation angle based on the motor rotation angle and speed ratio.

[0055] The motor parameters mentioned above can be data parameters generated when the motor is working, including but not limited to: motor torque and motor rotation angle. Motor torque is the magnitude of the torque generated when the motor rotates, which is determined by voltage and current factors. Motor rotation angle is the angle the motor rotates when it receives a pulse signal.

[0056] The aforementioned meshing efficiency can be the efficiency of gears in transmission, which is generally related to the type of gear, machining accuracy, gear and gear pair positioning device, transmission and travel, and lubrication conditions. It can be, but is not limited to, the worm meshing efficiency of a worm and the gear meshing efficiency of a gear.

[0057] In one optional embodiment, the cam plate torque is determined based on the motor torque, the first-stage worm gear ratio, the second-stage gear ratio, the first-stage worm gear meshing efficiency, the second-stage gear meshing efficiency, and the bearing efficiency. The cam plate rotation angle θ is determined based on the obtained motor rotation angle, the first-stage worm gear ratio, and the second-stage gear ratio.

[0058] In another optional embodiment, the speed ratio of the first-stage worm gear, the speed ratio of the second-stage gear, the meshing efficiency of the first-stage worm gear, the meshing efficiency of the second-stage gear, and the bearing efficiency in the dynamic simulation model can be directly obtained from experimental data. The cam plate torque can be determined by inputting the motor torque into the dynamic simulation model, and the cam plate angle θ can be determined by inputting the motor rotation angle into the dynamic simulation model.

[0059] Optionally, the transmission ratio includes: torque transmission ratio. The transmission ratio between the cam disk and the driving cam is determined using a dynamic simulation model, including: constructing a dynamic simulation model of the transmission device, wherein the dynamic simulation model includes at least: a driving cam model corresponding to the driving cam and a cam disk model corresponding to the cam disk; applying a preset torque to the driving cam model and applying a preset cam disk rotation angle to the cam disk model, and measuring the reaction torque of the cam disk model; and determining the torque transmission ratio based on the preset torque and the reaction torque.

[0060] The aforementioned transmission ratio can be the ratio of the angular velocities of two rotating components in the motor mechanism, or it can be the speed ratio of the transmission transducer, including but not limited to: torque transmission ratio. The torque transmission ratio can be the torque transmission ratio between the cam disc and the drive wheel shaft, or it can be the ratio of the preset torque applied at the center of the drive cam to the reaction torque measured at the center of the cam disc. The reaction torque can be the magnitude of the torque of the opposing force of the cam disc.

[0061] The aforementioned active cam model can be the model corresponding to the active cam in the simulation model. The cam disk model can be the model corresponding to the cam disk in the simulation model.

[0062] The aforementioned preset torque can be a torque set in advance as needed, or a constant torque applied in advance at the center of the active cam model as needed. The preset cam disk rotation angle can be a cam disk rotation angle set in advance as needed, or a constant rotation speed applied in advance at the center of the cam disk.

[0063] In one optional embodiment, a dynamic simulation model is constructed based on the transmission device, and a preset torque M1 is applied at the center of the active cam model, and a preset cam disk rotation angle is applied at the center of the cam disk model. The simulation is performed, and the reaction torque M2 at the center of the cam disk model is measured. According to the formula: δ(θplate)=M1 / M2, the torque transmission ratio δ(θplate) can be obtained.

[0064] It should be noted that, Figure 5 This is a schematic diagram illustrating an optional torque transmission ratio and cam disc rotation angle according to an embodiment of the present invention, as shown below. Figure 5 As shown, once the cam disk rotation angle exceeds a certain value, the torque transmission ratio tends to stabilize and does not change with the increase of the cam disk rotation angle. Therefore, applying a preset cam disk rotation angle to the cam disk model can accurately obtain the torque transmission ratio.

[0065] Optionally, the transmission device further includes: a ball cam, which determines the transmission parameters of the transmission device based on the transmission ratio and the cam disk parameters, including: determining the driving cam torque of the driving cam based on the torque transmission ratio and the cam disk torque; determining the driving cam axial force of the driving cam based on the driving cam torque and the ball cam parameters of the ball cam; and determining the driving cam axial force as a transmission parameter.

[0066] In one optional embodiment, the active cam torque is calculated using the obtained cam disk torque and torque transmission ratio, and the active cam torque is input into the dynamic simulation model. The dynamic simulation model determines the active cam axial force based on the active cam torque, ball cam raceway radius, ball cam helix lead angle, ball cam thrust bearing friction coefficient, and ball cam raceway friction coefficient, and determines the active cam axial force as a transmission parameter.

[0067] In another optional embodiment, the driving cam torque is manually determined using formulas or theories based on the cam disc torque and torque transmission ratio. The driving cam axial force is then calculated using the driving cam torque, ball cam raceway radius, ball cam helix lead angle, ball cam thrust bearing friction coefficient, and ball cam raceway friction coefficient. The calculated data is then compared with data from a dynamic simulation model or experiments to determine the driving cam axial force as the transmission parameter.

[0068] Optionally, the transmission ratio includes: angular transmission ratio, which is determined using a dynamic simulation model, including: applying a preset cam disk rotation angle to the cam disk model, measuring the active cam rotation angle of the active cam, and determining the angular transmission ratio based on the preset cam disk rotation angle and the active cam rotation angle.

[0069] The aforementioned rotational transmission ratio can be the ratio between the rotational angle applied at the center of the cam disc and the rotational angle measured at the center of the driving cam.

[0070] The aforementioned active cam rotation angle can be measured in a simulation model.

[0071] In one optional embodiment, a preset cam plate rotation angle θ2 is applied at the center of the cam plate model, and simulation is performed to measure the active cam rotation angle θ1 at the center of the active camshaft. The rotation angle transmission ratio ε(θplate) can be obtained by calculating according to the formula: ε(θplate)=θ1 / θ2.

[0072] It should be noted that, Figure 6 This is a schematic diagram illustrating the relationship between an optional angular transmission ratio and the cam disc rotation angle according to an embodiment of the present invention, as shown below. Figure 6 As shown, after the cam disk rotation angle exceeds a certain value, the rotational transmission ratio tends to stabilize and does not change with the increase of the cam disk rotation angle. Therefore, applying a preset cam disk rotation angle to the cam disk model can accurately obtain the rotational transmission ratio.

[0073] Optionally, the transmission ratio includes: an angular transmission ratio. The transmission parameters of the transmission device are determined based on the transmission ratio and the cam disk parameters, including: determining the active cam rotation angle of the active cam based on the angular transmission ratio and the cam disk rotation angle; determining the active cam axial displacement of the active cam based on the active cam rotation angle and the ball cam parameters; and determining the active cam axial displacement as a transmission parameter.

[0074] In one optional embodiment, the obtained cam disk rotation angle and rotation angle transmission ratio are used to determine the active cam rotation angle, and the active cam rotation angle is input into the dynamic simulation model. The dynamic simulation model determines the axial displacement of the active cam based on the active cam rotation angle, the ball cam raceway radius, and the ball cam helix lead angle, and determines the active cam axial displacement as a transmission parameter.

[0075] In another alternative embodiment, the active cam rotation angle is manually determined according to the cam disk rotation angle and the rotation angle transmission ratio using formulas or theories. The axial displacement of the active cam is further determined based on the active cam rotation angle, the ball cam raceway radius, and the ball cam helix lead angle. The calculated axial displacement of the active cam is then compared with the data from the dynamic simulation model or experiment to determine the axial displacement of the active cam as the transmission parameter.

[0076] Optionally, the method further includes: establishing a first hinge pair model between the cam disk model and the active cam model; establishing a cam pair connection model of the helical rise surface of the cam disk model and the outer cylindrical surface of the active cam model; fixing a connecting pin model on the active cam model, and establishing a second hinge pair model between the bearing and pin models of the active cam model; generating a dynamic simulation model based on the cam disk model, the active cam model, the first hinge pair model, the cam pair connection model, the second hinge pair model, and the pin model.

[0077] The aforementioned first articulated joint model can be an articulated joint model established at the rotation center of the cam disk model and the active cam model.

[0078] The aforementioned helical rise surface refers to a closed curve on the outer surface of the cam disk that spirals upwards gradually, used to control the movement of the connecting rod. When the cam rotates, the connecting rod undergoes complex movements such as compression, stretching, or offset following the curved shape of the cam disk, thereby realizing the machine's working function. The outer cylindrical surface can be the outer cylindrical curve of the active cam model. The cam pair connection model can be a model of the cam pair connection established by the helical rise surface of the cam disk model and the outer cylindrical surface of the active cam model.

[0079] The aforementioned second articulated joint model can be an articulated joint model established by the bearing and pin models of the active cam model. The pin model can be a mechanical connecting element that transmits force and motion through its boss and mating holes or slots, enabling two independently rotating shafts to move synchronously, exhibiting high precision and stability in terms of torque transmission and rotation angle.

[0080] In one alternative embodiment, Figure 4 This is a schematic diagram of an optional off-road transfer case cam disc-drive cam (wishbone) reduction mechanism according to an embodiment of the present invention, as shown below. Figure 4 As shown, when establishing the dynamic simulation model in the modeling software, the first hinge pair model is established at the rotation center of the cam disk model 6 and the active cam model 7, and the cam pair connection model is established on the helical lifting surface 6a of the cam disk 6 and the outer cylindrical surface of the active cam model 702. Figure 3 This is a schematic cross-sectional view of an optional off-road transfer case clutch actuator according to an embodiment of the present invention, as shown below. Figure 3 As shown, pin model 703 and active cam model 701 are fixedly connected. A second hinge pair model is established between the bearing 701 of the active cam model and pin model 703, thereby generating a dynamic simulation model composed of cam disk model, active cam model, first hinge pair model, cam pair connection model, second hinge pair model, and pin model.

[0081] Figure 7 This is a schematic diagram of the processing procedure of an optional transmission device according to an embodiment of the present invention, such as... Figure 7 As shown, the cam disk rotation angle is determined based on the motor rotation angle, the first-stage worm gear speed ratio, and the second-stage gear speed ratio; the cam disk torque is determined based on the motor torque, the first-stage worm gear speed ratio, the second-stage gear speed ratio, the first-stage worm gear meshing efficiency, the second-stage gear meshing efficiency, and the bearing efficiency. After establishing the dynamic simulation model, the torque transmission ratio and the rotation angle transmission ratio are determined based on the cam disk rotation angle. The driving cam torque is determined based on the torque transmission ratio, and the driving cam rotation angle is determined based on the rotation angle. Therefore, the driving cam axial displacement is determined based on the driving cam rotation angle, the ball cam raceway radius, and the ball cam helical lead angle; the driving cam axial force is determined based on the driving cam torque, the ball cam raceway radius, the ball cam helical lead angle, the ball cam thrust bearing friction coefficient, and the ball cam raceway friction coefficient.

[0082] It should be noted that internal combustion engine vehicles employ a transfer case within the transmission system to achieve four-wheel drive functionality. The engine's power output is transmitted to the transfer case via the transmission, which then distributes the power to the front and rear axles. In two-wheel drive mode, power is directly transmitted to the rear axle. In four-wheel drive mode, the electronic control system controls the motor to rotate, driving the clutch actuator to engage the clutch and transferring a portion of the power to the front axle. Within the clutch torque capacity range, the torque transmitted to the front axle depends on the applied motor torque. Therefore, when selecting the motor and designing the clutch actuator, it is necessary to calculate the relationship between the motor torque and the clutch push plate clamping force. Furthermore, during motor calibration, the relationship between the motor rotation angle and the axial displacement of the clutch push plate must also be calculated. These relationships are then used in calculations to improve the efficiency of obtaining the transmission parameters of the drivetrain.

[0083] Example 2

[0084] According to another aspect of the present invention, a transmission device is also provided, which can execute the processing method of the transmission device in the above embodiments. The specific implementation method and preferred application scenarios are the same as those in the above embodiments, and will not be described in detail here.

[0085] Figure 8 This is a schematic diagram of a transmission device according to an embodiment of the present invention, such as... Figure 8 As shown, the device includes the following components: an acquisition module 80, a first determination module 82, a second determination module 84, and a third determination module 86.

[0086] The acquisition module 80 is used to acquire the motor parameters of the motor and the speed ratio of the worm gear assembly;

[0087] The first determining module 82 is used to determine the cam disk parameters based on the motor parameters and the speed ratio;

[0088] The second determining module 84 is used to determine the transmission ratio between the cam disk and the driving cam using a dynamic simulation model;

[0089] The third determining module 86 is used to determine the transmission parameters of the transmission device based on the transmission ratio and cam disk parameters, wherein the dynamic simulation model is the transmission device established in the simulation environment.

[0090] Optionally, the first determining module includes: a first determining unit, used to determine the cam disk torque based on the motor torque, speed ratio, and meshing efficiency of the worm gear assembly; and a second determining unit, used to determine the cam disk angle based on the motor rotation angle and speed ratio.

[0091] Optionally, the second determining module includes: a construction unit for constructing a dynamic simulation model of the transmission device, wherein the dynamic simulation model includes at least: a driving cam model corresponding to the driving cam and a cam disk model corresponding to the cam disk; a first measurement unit for applying a preset torque to the driving cam model and applying a preset cam disk rotation angle to the cam disk model, and measuring the reaction torque of the cam disk model; and a third determining unit for determining the torque transmission ratio based on the preset torque and the reaction torque.

[0092] Optionally, the third determining module includes: a fourth determining unit for determining the driving cam torque of the driving cam based on the torque transmission ratio and the cam disc torque; a fifth determining unit for determining the driving cam axial force of the driving cam based on the driving cam torque and the ball cam parameters of the ball cam; and a sixth determining unit for determining the driving cam axial force as a transmission parameter.

[0093] Optionally, the second determining module further includes: a second measuring unit, used to apply a preset cam disk rotation angle to the cam disk model and measure the active cam rotation angle of the active cam; and a seventh determining unit, used to determine the rotation angle transmission ratio based on the preset cam disk rotation angle and the active cam rotation angle.

[0094] Optionally, the third determining module further includes: an eighth determining unit, used to determine the active cam rotation angle of the active cam based on the rotation angle transmission ratio and the cam disk rotation angle; a ninth determining unit, used to determine the active cam axial displacement of the active cam based on the active cam rotation angle and the ball cam parameters of the ball cam; and a tenth determining unit, used to determine the active cam axial displacement as a transmission parameter.

[0095] Optionally, the device further includes: a first establishment module for establishing a first hinge pair model between the cam disk model and the active cam model; a second establishment module for establishing a cam pair connection model of the helical rise surface of the cam disk model and the outer cylindrical surface of the active cam model; a third establishment module for fixing a connecting pin model on the active cam model and establishing a second hinge pair model between the bearing and pin models of the active cam model; and a generation module for generating a dynamic simulation model based on the cam disk model, the active cam model, the first hinge pair model, the cam pair connection model, the second hinge pair model, and the pin model.

[0096] Example 3

[0097] According to another aspect of the present invention, a non-volatile storage medium is also provided, the non-volatile storage medium including a stored program, wherein, when the program is executed, it controls the processor of the device to execute the processing method of the transmission device described above.

[0098] Example 4

[0099] According to another aspect of the present invention, a vehicle is also provided, comprising: one or more processors; a storage device for storing one or more programs; and, when the one or more programs are executed by the one or more processors, causing the one or more processors to perform the processing method of the transmission device described above.

[0100] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0101] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0102] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0103] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0104] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0105] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0106] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A processing method for a transmission device, characterized in that, The transmission device includes at least: a motor, a worm gear assembly, a cam disk, and a drive cam; the method includes: Obtain the motor parameters of the motor and the speed ratio of the worm gear assembly; The cam disk parameters are determined based on the motor parameters and the speed ratio. The transmission ratio between the cam disk and the driving cam is determined using a dynamic simulation model. The transmission parameters of the transmission device are determined based on the transmission ratio and the cam disk parameters, wherein the dynamic simulation model is the transmission device established in the simulation environment; The motor parameters include motor torque and motor rotation angle; the cam disk parameters include cam disk torque and cam disk rotation angle; the cam disk parameters are determined based on the motor parameters and the speed ratio, including: determining the cam disk torque based on the motor torque, the speed ratio, and the meshing efficiency of the worm gear assembly; and determining the cam disk rotation angle based on the motor rotation angle and the speed ratio. The transmission ratio includes a torque transmission ratio. Determining the transmission ratio between the cam disk and the driving cam using the dynamic simulation model includes: constructing the dynamic simulation model of the transmission device, wherein the dynamic simulation model includes at least: a driving cam model corresponding to the driving cam and a cam disk model corresponding to the cam disk; applying a preset torque to the driving cam model and a preset cam disk rotation angle to the cam disk model, and measuring the reaction torque of the cam disk model; determining the torque transmission ratio based on the preset torque and the reaction torque. The transmission device further includes a ball cam, and the transmission parameters of the transmission device are determined based on the transmission ratio and the cam disk parameters, including: determining the active cam torque of the active cam based on the torque transmission ratio and the cam disk torque; determining the active cam axial force of the active cam based on the active cam torque and the ball cam parameters of the ball cam; and determining the active cam axial force as the transmission parameter. The transmission ratio includes an angular transmission ratio. The transmission parameters of the transmission device are determined based on the transmission ratio and the cam disk parameters, including: determining the active cam angle of the active cam based on the angular transmission ratio and the cam disk angle; determining the active cam axial displacement of the active cam based on the active cam angle and the ball cam parameters of the ball cam; and determining the active cam axial displacement as the transmission parameter.

2. The processing method of the transmission device according to claim 1, characterized in that, The transmission ratio includes: the rotational transmission ratio, which is determined using the dynamic simulation model between the cam disk and the driving cam, including: A preset cam disk rotation angle is applied to the cam disk model, and the active cam rotation angle of the active cam is measured; The rotational transmission ratio is determined based on the preset cam disc rotation angle and the active cam rotation angle.

3. The processing method of the transmission device according to claim 1, characterized in that, The method further includes: Establish a first hinge pair model between the cam disk model and the active cam model; Establish a cam pair connection model for the helical rise surface of the cam disk model and the outer cylindrical surface of the active cam model; A pin model is fixedly connected to the active cam model to establish a second hinge pair model between the bearing of the active cam model and the pin model; The dynamic simulation model is generated based on the cam disk model, the active cam model, the first hinge pair model, the cam pair connection model, the second hinge pair model, and the pin model.

4. A processing device for a transmission device, characterized in that, The processing device is used to execute the processing method of the transmission device according to any one of claims 1 to 3, wherein the transmission device includes: a motor, a worm gear assembly, a cam disk, and a drive cam, comprising: The acquisition module is used to acquire the motor parameters of the motor and the speed ratio of the worm gear assembly; The first determining module is used to determine the cam disk parameters of the cam disk based on the motor parameters and the speed ratio; The second determining module is used to determine the transmission ratio between the cam disk and the driving cam using a dynamic simulation model; The third determining module is used to determine the transmission parameters of the transmission device based on the transmission ratio and the cam disk parameters, wherein the dynamic simulation model is the transmission device established in the simulation environment.

5. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored program, wherein, when the program is executed, it controls the processor of the device to execute the processing method of the transmission device according to any one of claims 1 to 3.

6. A vehicle, characterized in that, include: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors perform the processing method of the transmission device according to any one of claims 1 to 3.

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