Variable speed structure, control method for variable speed structure, gearbox and vehicle

Abstract

This application relates to a transmission structure, a control method for the transmission structure, a gearbox, and a vehicle. The transmission structure includes: a first driver; a second driver; a planetary gear set including a sun gear, a ring gear, and a planet carrier; a first transmission mechanism drivingly connecting the sun gear and the first driver; a second transmission mechanism drivingly connecting the ring gear and the second driver; and an output shaft fixedly connected to the planet carrier. By setting the second driver and the second transmission mechanism that transmits the power of the second driver to the ring gear, the power of the ring gear and the power transmitted from the first driver to the sun gear can be transmitted together through the planet gears to the planet carrier fixedly connected to the output shaft. By adjusting the rotational speed of the second driver, the rotational speed of the ring gear is controlled, thereby achieving continuously variable transmission (CVT).

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a transmission structure, a control method for the transmission structure, a gearbox, and a vehicle. Background Technology

[0002] With social development and progress, vehicles are becoming increasingly popular, serving not only as a primary mode of transportation for daily travel but also for carrying or transporting goods, providing great convenience to people.

[0003] In the prior art, vehicles include multi-speed transmissions, which achieve gear adjustment through the combination of different gear sets in the multi-speed transmission.

[0004] However, during use, it was discovered that the difference in gear ratios between adjacent gears in a multi-speed transmission is a technical issue that affects vehicle performance. Summary of the Invention

[0005] This application provides a transmission structure, a control method for the transmission structure, a gearbox, and a vehicle, which improve vehicle performance and at least partially solve the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a transmission structure is provided, the transmission structure comprising:

[0007] First driver;

[0008] Second drive;

[0009] The planetary gear set includes the sun gear, the ring gear, and the planet carrier;

[0010] A first transmission mechanism is used to drive the sun gear and the first driver.

[0011] The second transmission mechanism is connected to the gear ring and the second driver.

[0012] The output shaft is fixedly connected to the planetary carrier.

[0013] Optionally, the second transmission mechanism includes a first coupling mechanism, which can switch between a coupled state and a disconnected state.

[0014] Optionally, the transmission structure further includes a locking mechanism for disengagingly locking the gear ring.

[0015] Optionally, the transmission structure further includes a second coupling mechanism that drives the second driver and the first transmission mechanism, the second coupling mechanism being able to switch between a coupled state and a disconnected state.

[0016] The speed-changing structure includes a third coupling mechanism connecting the first driver and the first transmission mechanism, the third coupling mechanism being able to switch between a coupled state and a disconnected state.

[0017] Optionally, the first transmission mechanism includes a first driving gear and a first driven gear that is drivenly connected to the first driving gear. The first driving gear is drivenly connected to the third coupling mechanism, and the first driven gear is fixedly connected to the sun gear.

[0018] Optionally, the first transmission mechanism includes a first spline, which connects the first driven gear to the sun gear.

[0019] Optionally, the first transmission mechanism further includes an idler gear, which is engaged between the first driving gear and the first driven gear.

[0020] Optionally, the second coupling mechanism connects the second driver and the idler wheel.

[0021] Optionally, the second transmission mechanism further includes a transmission gear set, which connects the second driver and the first coupling mechanism.

[0022] Optionally, the transmission gear set includes a second driving gear and a second driven gear that is drivingly connected to the second driving gear. The second driving gear is connected to the second driver, and the second driven gear is connected to the first coupling mechanism.

[0023] Optionally, the first coupling mechanism includes a sliding sleeve, a first engaging tooth, and a second engaging tooth, wherein the sliding sleeve is slidable to switch the first engaging tooth and the second engaging tooth between a coupled state and a disconnected state.

[0024] Optionally, the first drive is an engine or an electric motor, and the second drive is an electric motor.

[0025] Optionally, the transmission structure includes a first single-drive working state, a second single-drive working state, a dual-drive working state, or a continuously variable transmission working state.

[0026] When the transmission structure is in the first single-drive working state, the locking mechanism is in the locked gear state, the first coupling mechanism and the second coupling mechanism are in the disconnected state, the third coupling mechanism is in the coupled state, and the power of the first driver is transmitted to the output shaft in sequence through the first transmission mechanism, the sun gear, the planet gears, and the planet carrier.

[0027] When the transmission structure is in the second single-drive working state, the locking mechanism is in the locked gear ring state, the first coupling mechanism and the third coupling mechanism are in the disconnected state, the second coupling mechanism is in the coupled state, and the power of the second drive is transmitted to the output shaft in sequence through the first transmission mechanism, the sun gear, the planet gears, and the planet carrier.

[0028] When the transmission structure is in the dual-drive working state, the locking mechanism is in the locked gear ring state, the first coupling mechanism is in the disconnected state, and the second coupling mechanism and the third coupling mechanism are in the coupled state. The power of the first driver and the second driver is transmitted to the output shaft in sequence through the first transmission mechanism, the sun gear, the planet gears, and the planet carrier.

[0029] When the transmission structure is in the continuously variable transmission (CVT) working state, the locking mechanism is in the open state, the first coupling mechanism and the third coupling mechanism are in the coupled state, the second coupling mechanism is in the open state, the drive of the first driver is transmitted to the sun gear through the first transmission mechanism, the power of the second driver is transmitted to the ring gear through the second transmission mechanism, and the sun gear and the ring gear transmit the power to the output shaft through the planet gears and the planet carrier.

[0030] According to a second aspect of this application, a control method for a transmission structure is provided. The control method is applied to the transmission structure and is used to control the transmission structure to switch between two of three states: a first single-drive operating state, a second single-drive operating state, a dual-drive operating state, and a continuously variable transmission (CVT) operating state.

[0031] Optionally, the control method is used to control the transmission structure to switch from the first single-drive operating state to the dual-drive operating state, and the control method includes:

[0032] The second driver is started, and the second coupling mechanism is adjusted to the coupling state. The power of the first driver and the second driver is transmitted to the output shaft through the first transmission mechanism, the sun gear, the planet gear, and the planet carrier.

[0033] Optionally, the control method is used to control the transmission structure to switch from the dual-drive operating state to the first single-drive operating state, and the control method includes:

[0034] Adjust the second coupling mechanism to the disconnected state and turn off the second driver.

[0035] Optionally, the control method is used to control the transmission structure to switch from the dual-drive operating state to the continuously variable transmission operating state, and the control method includes:

[0036] Adjust the second coupling mechanism to the disconnected state and turn off the second driver;

[0037] Adjust the first coupling mechanism to the coupling state;

[0038] The second drive is activated and the locking mechanism is disengaged. The power of the second drive passes sequentially through the second transmission mechanism and the gear ring, and together with the power transmitted from the first drive to the sun gear, it is transmitted to the output shaft through the planet gears and the planet carrier.

[0039] Optionally, the control method is used to control the transmission structure to switch from the continuously variable transmission working state to the dual-drive working state, and the control method includes: turning off the second drive and adjusting the locking mechanism to lock the gear ring;

[0040] Adjust the first coupling mechanism to the disconnected state;

[0041] The second drive is activated, and the second coupling mechanism is controlled to couple. The power of the first drive and the second drive is transmitted to the output shaft through the first transmission mechanism, the sun gear, the planet gears, and the planet carrier.

[0042] Optionally, the control method is used to control the transmission structure to switch from the first single-drive operating state to the continuously variable transmission (CVT) operating state, and the control method includes:

[0043] Adjust the first coupling mechanism to the coupling state;

[0044] The second drive is activated and the locking mechanism is disengaged. The power of the second drive passes sequentially through the second transmission mechanism and the gear ring, and together with the power transmitted from the first drive to the sun gear, it is transmitted to the output shaft through the planet gears and the planet carrier.

[0045] Optionally, the control method is used to control the transmission structure to switch from the continuously variable transmission (CVT) operating state to the first single-drive operating state, and the control method includes:

[0046] The second driver is turned off, and the locking mechanism is adjusted to lock the gear ring.

[0047] Optionally, the control method is used to control the transmission structure to switch from the second single-drive operating state to the dual-drive operating state, and the control method includes:

[0048] The first driver is started, and the third coupling mechanism is adjusted to the coupling state. The power of the first driver and the second driver is transmitted to the output shaft through the first transmission mechanism, the sun gear, the planet gear, and the planet carrier.

[0049] Optionally, the control method is used to control the transmission structure to switch from the dual-drive operating state to the second single-drive operating state, and the control method includes:

[0050] Adjust the third coupling mechanism to the disconnected state and turn off the first driver.

[0051] Optionally, the control method is used to control the transmission structure to switch from the second single-drive operating state to the continuously variable transmission (CVT) operating state, and the control method includes:

[0052] The first driver is started, and the third coupling mechanism is adjusted to the coupling state. The power of the first driver is transmitted to the sun gear through the first transmission mechanism.

[0053] Turn off the second driver, disconnect the second coupling mechanism, and adjust the first coupling mechanism to the coupled state;

[0054] The second drive is activated and the locking mechanism is disengaged. The power of the second drive passes sequentially through the second transmission mechanism and the gear ring, and together with the power transmitted from the first drive to the sun gear, it is transmitted to the output shaft through the planet gears and the planet carrier.

[0055] Optionally, the control method is used to control the transmission structure to switch from the continuously variable transmission (CVT) operating state to the second single-drive operating state, and the control method includes:

[0056] The third coupling mechanism is disconnected, the first driver is turned off, and the locking mechanism is locked. The first coupling mechanism is disconnected, and the second coupling mechanism is adjusted to be in a coupled state. The power of the second driver is transmitted to the output shaft through the first transmission mechanism, the sun gear, the planet gears, and the planet carrier.

[0057] Optionally, the control method is used to control the transmission structure to switch from the first single-drive operating state to the second single-drive operating state, and the control method includes:

[0058] Start the second drive, adjust the second coupling mechanism to the coupled state, adjust the third coupling mechanism to the disconnected state, and shut down the first drive. The power of the second drive is transmitted to the output shaft through the first transmission mechanism, the sun gear, the planet gears, and the planet carrier.

[0059] Optionally, the control method is used to control the transmission structure to switch from the second single-drive operating state to the first single-drive operating state, and the control method includes:

[0060] Start the first driver, adjust the third coupling mechanism to the coupled state, adjust the second coupling mechanism to the disconnected state, and turn off the second driver. The power of the first driver is transmitted to the output shaft through the first transmission mechanism, the sun gear, the planet gears, and the planet carrier.

[0061] According to a third aspect of this application, a gearbox is provided, the gearbox including the aforementioned transmission structure, or a control method for executing the transmission structure.

[0062] According to a fourth aspect of this application, a vehicle is provided, the vehicle including the vehicle transmission system, or the transmission structure, or a control method for performing the transmission structure.

[0063] This application achieves continuously variable transmission (CVT) by setting a second driver and transmitting the power of the second driver to the gear ring via a second transmission mechanism. This allows the power of the gear ring, together with the power transmitted from the first driver to the sun gear, to be transmitted through the planetary gears to the planet carrier fixedly connected to the output shaft. By adjusting the speed of the second driver, the speed of the gear ring is controlled, thus realizing CVT in the transmission structure and avoiding jerking. This at least partially solves the technical problem of the difference between adjacent gears in existing multi-speed transmissions, which affects vehicle performance.

[0064] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0066] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0067] Figure 1 This is a schematic diagram of a speed-changing structure provided in an exemplary embodiment of this application;

[0068] Figure 2 yes Figure 1 A schematic diagram of the planetary gear setter mechanism with variable speed structure;

[0069] Figure 3 yes Figure 1 The state diagram of the transmission structure in the first single drive mode;

[0070] Figure 4 yes Figure 1 The state diagram of the transmission structure in the second single drive mode;

[0071] Figure 5 yes Figure 1 The state diagram of the transmission structure in dual-drive mode;

[0072] Figure 6 yes Figure 1 The diagram shows the state of the transmission structure when it is in continuously variable transmission (CVT).

[0073] Explanation of reference numerals in the attached figures:

[0074] 100. Variable speed structure;

[0075] 10. First drive; 20. Second drive;

[0076] 30. Planetary gear set; 31. Sun gear; 32. Planetary gears; 33. Planet carrier; 34. Gear ring; 35. Planetary shaft;

[0077] 40. First transmission mechanism; 41. First driving gear; 42. First driven gear; 43. Idler gear;

[0078] 50. Second transmission mechanism; 51. Transmission gear set; 52. Second driving gear; 53. Second driven gear;

[0079] 60. Output shaft; 70. Locking mechanism;

[0080] 81. First coupling mechanism; 811. Sliding sleeve; 812. First engagement tooth; 813. Second engagement tooth; 82. Second coupling mechanism; 83. Third coupling mechanism. Detailed Implementation

[0081] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0082] This application achieves stepless speed change of the speed change structure 100 by setting a second driver 20 to drive a second transmission mechanism 50, and then driving a gear ring 34 to rotate through the second transmission mechanism 50, and controlling the speed of the gear ring 34 through the second driver 20.

[0083] This application provides a transmission structure 100, applied in a vehicle's gearbox, which enables continuously variable transmission (CVT). The primary function of the transmission structure 100 in a vehicle is to adjust the speed and torque output from the output shaft 60 by changing the transmission ratio. Figure 1 The diagram shown is a schematic diagram of a speed-changing structure 100 provided in an exemplary embodiment of this application. The speed-changing structure 100 includes: a first driver 10, a second driver 20, a planetary gear set 30, a first transmission mechanism 40, a second transmission mechanism 50, and an output shaft 60.

[0084] The first driver 10 can be an engine or an electric motor, while the second driver 20 can be an electric motor.

[0085] The following is a detailed explanation of the structure of planetary arrangement 30. For example... Figure 2 As shown, the planetary gear set 30 includes a sun gear 31, planet gears 32, a planet carrier 33, and a ring gear 34. The sun gear 31 is located at the center of the planetary gear set 30, and its axis coincides with the central axis of the planetary gear set 30. The sun gear 31 can rotate around its own axis; in this embodiment, the sun gear 31 serves as the input element in the planetary gear set 30. There are usually multiple planet gears 32, generally distributed around the sun gear 31. The planet gears 32 are mounted on planet shafts 35, which are fixed to the planet carrier 33. The planet gears 32 mesh with both the sun gear 31 and the ring gear 34, and can both rotate on their own axes and revolve around the sun gear 31 with the planet carrier 33, just like planets in the solar system. The planet carrier 33 is the component that supports the planet gears 32, connecting multiple planet gears 32 together so that the planet gears 32 can maintain their relative positions and move together. The planet carrier 33 also rotates around the central axis of the planetary gear set 30; in this application, the planet carrier 33 serves as the power output end. The gear ring 34 is located on the outermost side of the planetary gear set 30 and meshes with the planet gears 32. The gear ring 34 also rotates around the central axis of the planetary gear set 30. In this application, the gear ring 34 can serve as a power input element, and can transmit power through meshing with the planet gears 32.

[0086] The first transmission mechanism 40 is connected to the sun gear 31 and the first driver 10, and is used to transmit the power of the second driver 20 to the sun gear 31. The second transmission mechanism 50 is connected to the gear ring 34 and the second driver 20, and is used to transmit the power of the second driver 20 to the gear ring 34.

[0087] The output shaft 60 is fixedly connected to the planet carrier 33. Specifically, the output shaft 60 and the planet carrier 33 can be fixedly connected via splines or the like. The sun gear 31 and the ring gear 34 transmit power to the planet gears 32, which in turn transmit it to the planet carrier 33, thus transmitting power to the output shaft 60. By adjusting the speed of the second drive 20, the speed of the ring gear 34 is controlled, achieving continuously variable transmission (CVT) of the transmission structure 100. The output shaft 60 can be connected directly to the vehicle wheels, or it can be connected to the wheels via a reduction gear.

[0088] This application, by setting a second drive 20 and transmitting the power of the second drive 20 to the gear ring 34 via a second transmission mechanism 50, enables the power of the gear ring 34 to be transmitted together with the power transmitted from the first drive 10 to the sun gear 31, through the planet gears 32 to the planet carrier 33 fixedly connected to the output shaft 60. By adjusting the speed of the second drive 20, the speed of the gear ring 34 is controlled, thereby achieving continuously variable transmission of the transmission structure 100, avoiding jerking sensation, and at least partially solving the technical problem of the difference between adjacent gears in existing multi-speed transmissions affecting vehicle performance.

[0089] In some embodiments, in order to enable the first driver 10 to perform driving work independently, the second transmission mechanism 50 includes a first coupling mechanism 81, which can switch between a coupled state and a disconnected state.

[0090] The first coupling mechanism 81 refers to connecting two or more motion / power systems through mechanical components. When the first coupling mechanism 81 is in the coupled state, the second driver 20 and the gear ring 34 can realize the transmission of power. Conversely, if the first coupling mechanism 81 is in the disconnected state, the transmission path between the second driver 20 and the gear ring 34 is broken, and power cannot be transmitted.

[0091] When the first coupling mechanism 81 is in the coupled state, the transmission structure 100 can perform continuously variable transmission; when the first coupling mechanism 81 is in the disengaged state, the second drive 20 is disconnected, and the power of the first drive 10 can be transmitted to the sun gear 31 through the first transmission mechanism 40. The sun gear 31 transmits the power to the planet gear 32, and the planet gear 32 transmits the power to the planet carrier 33 which is fixedly connected to the output shaft 60, thereby transmitting the power to the output shaft 60 and realizing the first single drive. This drive method is suitable for execution at low vehicle speeds. For the sake of convenience, this drive method is called the first single drive.

[0092] By setting the first coupling mechanism 81, when continuously variable transmission is required, the first coupling mechanism 81 can be adjusted to the coupling state; when the vehicle is at low speed, and the first single drive is required through the first driver 10, the first coupling mechanism 81 can be adjusted to the disconnected state. Different driving modes are realized through the first coupling mechanism 81, which helps to save the space occupied by the transmission structure 100 and reduce the cost of the transmission structure 100.

[0093] In some embodiments, the transmission structure 100 also includes a locking mechanism 70 for a disengageable locking gear ring 34, for example, locking the gear ring 34 to the housing by means of the locking mechanism 70, and disengaging the locking mechanism 70 when the gear ring 34 needs to rotate.

[0094] For example, in this embodiment, when continuously variable transmission is required, the locking mechanism 70 is disconnected, and the power of the second drive 20 is transmitted to the gear ring 34 through the second transmission mechanism 50, causing the gear ring 34 to rotate; while in the first single drive mode, the locking mechanism 70 locks the gear ring 34 to the housing, so that a large speed ratio reduction and torque amplification can be achieved through the planetary gear set 30.

[0095] In some embodiments, the transmission structure 100 further includes a second coupling mechanism 82 that drives the second driver 20 and the first transmission mechanism 40, the second coupling mechanism 82 being able to switch between a coupled state and a disconnected state.

[0096] The second coupling mechanism 82 refers to connecting two or more motion / power systems through mechanical components. When the second coupling mechanism 82 is in a coupled state, the second driver 20 and the first transmission mechanism 40 can transmit power. Conversely, if the second coupling mechanism 82 is in a disconnected state, the transmission path between the second driver 20 and the first transmission mechanism 40 is disconnected, and power cannot be transmitted.

[0097] When the second coupling mechanism 82 is in the disengaged state, the transmission structure 100 can achieve a first single drive or continuously variable transmission by adjusting the first coupling mechanism 81. When the second coupling mechanism 82 is in the coupled state, the first coupling mechanism 81 needs to be adjusted to the disengaged state so that the power of the second drive 20 can be transmitted to the sun gear 31 through the first transmission mechanism 40. That is, at this time, the power of the first drive 10 and the second drive 20 is transmitted to the sun gear 31 through the first transmission mechanism 40. The sun gear 31 transmits the power to the planet gear 32, and the planet gear 32 transmits the power to the planet carrier 33 which is fixedly connected to the output shaft 60. This achieves the simultaneous transmission of the power of the first drive 10 and the second drive 20 to the output shaft 60, realizing dual drive, that is, two drives. This type of drive is suitable for high torque output conditions, such as when the vehicle starts or climbs a hill and requires high torque drive.

[0098] By setting a second coupling mechanism 82 between the second driver 20 and the first transmission mechanism 40, the dual-drive mode of the transmission structure 100 can be realized, which helps to save the space occupied by the transmission structure 100 and reduce the cost of the transmission structure 100.

[0099] In some embodiments, the transmission structure 100 further includes a third coupling mechanism 83 connecting the first driver 10 and the first transmission mechanism 40, the third coupling mechanism 83 being switchable between a coupled state and a disconnected state. By providing the third coupling mechanism 83, the first driver 10 and the first transmission mechanism 40 can be disconnected or connected.

[0100] When the third coupling mechanism 83 is in the coupled state, the first driver 10 can participate in the work, such as realizing the first single-drive working state, the dual-drive working state, and the stepless working state at the forward speed; when the third coupling mechanism 83 is in the disconnected state, the first driver 10 does not participate in the work, and only the second driver 20 can participate in the work. The power of the second driver 20 can be transmitted to the sun gear 31 through the first transmission mechanism 40 to realize the second single-drive working state.

[0101] The structure of the first transmission mechanism 40 will be described in detail below.

[0102] In some embodiments, the first transmission mechanism 40 includes a first driving gear 41 and a first driven gear 42 that is pulverizedly connected to the first driving gear 41. The first driving gear 41 is pulverizedly connected to the third coupling mechanism 83, and the first driven gear 42 is fixedly connected to the sun gear 31, such as through a spline connection. Specifically, in this embodiment, the first driven gear 42 and the sun gear 31 can be fixedly connected by a spline. The sun gear 31 is rotatably mounted on the output shaft 60.

[0103] The power of the first drive 10 is transmitted to the first driven gear 42 through the first driving gear 41, and then to the sun gear 31 through the first driven gear 42, thus realizing the power transmission.

[0104] In some embodiments, the first transmission mechanism 40 includes a first spline (not shown) that connects the first driven gear 42 to the sun gear 31.

[0105] The first driven gear 42 and the sun gear 31 are connected by the first spline, so that the power can be reliably transmitted.

[0106] In some embodiments, the first transmission mechanism 40 further includes an idler gear 43, which is driven to mesh between the first driving gear 41 and the first driven gear 42. Besides transmitting power from the first driving gear 41 to the first driven gear 42, the idler gear 43 can also be used to connect the second drive 20.

[0107] In this embodiment, the second coupling mechanism 82 connects the second driver 20 and the idler wheel 43. By connecting the second driver 20 to the idler wheel 43 via the second coupling mechanism 82, the first driver 10 and the second driver 20 can be positioned on the same side, for example, along the Y-axis. In this side-by-side configuration, the first driver 10 and the second driver 20 can be stacked along the X-axis, reducing the space occupied in the Y and Z directions. Alternatively, they can be stacked along the Z-axis, reducing the space occupied in the X and Y directions. They can also be arranged at an angle depending on space requirements, avoiding the need to occupy more lateral space on either side of the first drive gear 41, thus better utilizing the installation space within the gearbox. Of course, if there is sufficient installation space, the second driver 20 can be connected to the first drive gear 41 via the second coupling mechanism 82, or it can be connected to the idler wheel 43, i.e., positioned on either side of the Y-axis, and then stacked or arranged at an angle in the Z or X directions, depending on the specific requirements. The Z-direction is perpendicular to both the X and Y directions.

[0108] In addition, if further deceleration is required, the first transmission mechanism 40 may also include other deceleration mechanisms, which may be located between the idler gear 43 and the first driven gear 42.

[0109] The structure of the second transmission mechanism 50 will be described in detail below.

[0110] In some embodiments, the second transmission mechanism 50 further includes a transmission gear set 51, which connects the second driver 20 and the first coupling mechanism 81. The transmission gear set 51 is used for speed reduction and for transmitting power from the second driver 20 to the first coupling mechanism 81.

[0111] In some embodiments, the transmission gear set 51 includes a second driving gear 52 and a second driven gear 53 meshing with the second driving gear 52. The second driving gear 52 is connected to the second driver 20, and the second driven gear 53 is connected to the first coupling mechanism 81. In a specific embodiment, the second driving gear 52 and the output shaft 60 of the second driver 20 can be connected by a spline, and the second driven gear 53 can be fixedly connected to the first coupling mechanism 81, or connected by a spline or other connection methods.

[0112] The power of the second driver 20 is transmitted to the second driven gear 53 through the second driving gear 52. The second driven gear 53 then transmits the power to the gear ring 34 through the first coupling mechanism 81. The second driver 20 can drive the gear ring 34 at different speeds, thereby adjusting the speed ratio and performing stepless speed regulation.

[0113] Understandably, in order to reduce the rotational speed of the second drive 20, a speed reduction mechanism can also be provided between the second drive gear 52 and the second driven gear 53.

[0114] In some embodiments, the first coupling mechanism 81 includes a sliding sleeve 811, a first engaging tooth 812, and a second engaging tooth 813. The sliding sleeve 811 slides to switch the first engaging tooth 812 and the second engaging tooth 813 between a coupled state and a disconnected state. The second engaging tooth 813 is connected to the gear ring 34, or more specifically, it can be connected via a spline.

[0115] By setting the first coupling mechanism 81 to slide the sliding sleeve 811, the first engagement tooth 812 and the second engagement tooth 813 can switch between a coupled state and a disconnected state. In addition to realizing power transmission, this coupling mechanism is flexible in operation, can realize large torque transmission, and has high reliability.

[0116] The following will introduce the four working states of the transmission structure 100.

[0117] In this embodiment, the transmission structure 100 can have four working states: a first single-drive working state, a second single-drive working state, a dual-drive working state, and a continuously variable transmission (CVT) working state. Specifically, the transmission structure 100 includes a first single-drive working state, a second single-drive working state, a dual-drive working state, or a CVT working state.

[0118] like Figure 3 As shown, the first single-drive operating state is as follows: the first driver 10 drives the output shaft 60 through the first transmission mechanism 40. When the transmission structure 100 is in the first single-drive operating state, the locking mechanism 70 is in the locking gear ring 34 state, the first coupling mechanism 81 and the second coupling mechanism 82 are in the disengaged state, the second driver 20 is in the closed state, and the power of the first driver 10 is transmitted to the output shaft 60 sequentially through the first transmission mechanism 40, the sun gear 31, the planet gears 32, and the planet carrier 33. The first single-drive operating state is suitable for the vehicle to travel at low speed and fixed speed ratio.

[0119] like Figure 4 As shown, the second single-drive operating state is as follows: the second drive unit 20 drives the output shaft 60 through the first transmission mechanism 40. When the transmission structure 100 is in the second single-drive operating state, the locking mechanism 70 is locked to the gear ring 34, the first coupling mechanism 81 and the third coupling mechanism 83 are disengaged, and the second coupling mechanism 82 is coupled. The power of the second drive unit 20 is transmitted sequentially through the first transmission mechanism 40, the sun gear 31, the planet gears 32, and the planet carrier 33 to the output shaft 60. The second single-drive operating state is suitable for low-speed, fixed-ratio vehicle operation.

[0120] like Figure 5 As shown, in the dual-drive working state, the first drive 10 and the second drive 20 jointly drive the output shaft 60 through the first transmission mechanism 40. When the transmission structure 100 is in the dual-drive working state, the locking mechanism 70 is in the locking gear ring 34 state, the first coupling mechanism 81 is in the disengaged state, and the second coupling mechanism 82 and the third coupling mechanism 83 are in the coupled state. The power of the first drive 10 and the second drive 20 is transmitted to the output shaft 60 in sequence through the first transmission mechanism 40, the sun gear 31, the planet gear 32, and the planet carrier 33. By connecting the first drive 10 and the second drive 20 in parallel, a large torque output is achieved under a fixed high speed ratio, which is suitable for high torque requirements such as vehicle climbing and acceleration.

[0121] like Figure 6 As shown, the continuously variable transmission (CVT) operates as follows: the first driver 10 drives the output shaft 60 through the first transmission mechanism 40, and the second driver 20 drives the output shaft 60 through the second transmission mechanism 50. When the transmission structure 100 is in the CVT operating state, the locking mechanism 70 is in the open state, the first coupling mechanism 81 and the third coupling mechanism 83 are in the coupled state, and the second coupling mechanism 82 is in the open state. The drive of the first driver 10 is transmitted to the sun gear 31 through the first transmission mechanism 40, and the power of the second driver 20 is transmitted to the ring gear 34 through the second transmission mechanism 50. The sun gear 31 and the ring gear 34 transmit the power to the output shaft 60 through the planetary gears 32 and the planet carrier 33. The coordinated operation of the first driver 10 and the second driver 20 can realize the CVT of the planetary gear set 30, effectively avoiding the problem of gear differences in multi-speed reducers.

[0122] By adjusting the rotational speed of the second drive 20 to control the rotational speed of the gear ring 34, the speed ratio of the drive system can be continuously variable, with no sudden changes in speed ratio during speed adjustment, thus avoiding problems such as jerking and sudden torque changes. Simultaneously, speed ratio and strategy control can ensure that the first drive 10 and the second drive 20 operate within their efficient speed ranges. Furthermore, by having the first drive 10 and the second drive 20 work together, the output speed range can be expanded, reducing the speed requirements of either the first drive 10 or the second drive 20 for vehicle speed.

[0123] This application also provides a control method for a transmission structure 100. The control method is applied to the aforementioned transmission structure 100. The first driver 10 can be an engine or a motor, and the second driver 20 is a motor. The control method is used to control the transmission structure 100 to switch between two of the following four states: a first single-drive operating state, a second single-drive operating state, a dual-drive operating state, and a continuously variable transmission (CVT) operating state. In other words, the four operating states of the transmission structure 100 can be switched between each other to meet the needs of different vehicle operating conditions.

[0124] First, we will introduce the switching between the first single-drive working state and the dual-drive working state.

[0125] Switching from single-drive to dual-drive operation: The control method for switching the transmission structure 100 from the single-drive operation state to the dual-drive operation state includes:

[0126] The second drive 20 is started, and the second coupling mechanism 82 is adjusted to the coupling state. The power of the first drive 10 and the second drive 20 is transmitted to the output shaft 60 through the first transmission mechanism 40, the sun gear 31, the planet gear 32, and the planet carrier 33, so as to realize the switching from the first single drive working state to the dual drive working state to meet the vehicle's requirements for the dual drive working state.

[0127] Switching from dual-drive operating state to first single-drive operating state: The control method used to control the transmission structure 100 to switch from dual-drive operating state to first single-drive operating state includes:

[0128] Adjust the second coupling mechanism 82 to the disconnected state and turn off the second drive 20 to switch from the dual-drive working state to the first single-drive working state, so as to meet the vehicle's requirements for the first single-drive working state.

[0129] When switching from dual-drive to single-drive, it is only necessary to disconnect the second coupling mechanism 82. The state switch can be carried out during driving without any jerking.

[0130] Second, the switching between dual-drive working mode and continuously variable transmission (CVT) working mode is introduced.

[0131] Switching from dual-drive operating mode to continuously variable transmission (CVT) operating mode: The control method is used to control the transmission structure 100 to switch from dual-drive operating mode to CVT operating mode. The control method includes:

[0132] Adjust the second coupling mechanism 82 to the disconnected state and turn off the second driver 20;

[0133] Adjust the first coupling mechanism 81 to the coupling state;

[0134] The second drive 20 is activated, and the locking mechanism 70 is disengaged. The power from the second drive 20 passes sequentially through the second transmission mechanism 50 and the ring gear 34, and then, together with the power transmitted from the first drive 10 to the sun gear 31, is transmitted through the planetary gears 32 and the planet carrier 33 to the output shaft 60. This achieves the switching from dual-drive operation to continuously variable transmission (CVT) operation to meet the vehicle's requirements for CVT operation. The speed of the second drive 20 is controlled to achieve variable speed ratio.

[0135] Switching from continuously variable transmission (CVT) to dual-drive operation: The control method is used to control the transmission structure 100 to switch from CVT operation to dual-drive operation. The control method includes:

[0136] Close the second drive 20 and adjust the locking mechanism 70 to lock the gear ring 34;

[0137] Adjust the first coupling mechanism 81 to the disconnected state;

[0138] The second drive 20 is started and the second coupling mechanism 82 is controlled to couple. The power of the first drive 10 and the second drive 20 is transmitted to the output shaft 60 through the first transmission mechanism 40, the sun gear 31, the planet gear 32, and the planet carrier 33, realizing the switching from continuously variable transmission working state to dual drive working state to meet the vehicle's demand for dual drive working state.

[0139] Third, the switching between the first single-drive working state and the continuously variable transmission (CVT) working state is introduced.

[0140] Switching from the first single-drive operating state to the continuously variable transmission (CVT) operating state: The control method is used to control the transmission structure 100 to switch from the first single-drive operating state to the CVT operating state. The control method includes:

[0141] Adjust the first coupling mechanism 81 to the coupling state;

[0142] The second drive 20 is started and the locking mechanism 70 is disengaged. The power of the second drive 20 passes through the second transmission mechanism 50 and the gear ring 34 in sequence, and together with the power transmitted from the first drive 10 to the sun gear 31, it is transmitted to the output shaft 60 through the planet gear 32 and the planet carrier 33. This realizes the switching from the first single drive working state to the continuously variable transmission working state. The continuously variable transmission can be realized by controlling the speed of the second drive 20, which meets the vehicle's requirements for the continuously variable transmission working state.

[0143] Switching from continuously variable transmission (CVT) operating state to first single-drive operating state: The control method is used to control the transmission structure 100 to switch from CVT operating state to first single-drive operating state. The control method includes:

[0144] The second drive 20 is turned off, and the locking mechanism 70 is adjusted to lock the gear ring 34, so as to switch from the continuously variable transmission working state to the first single drive working state to meet the vehicle's requirements for the first single drive working state.

[0145] Fourth, the switching between the second single-drive working state and the dual-drive working state is introduced.

[0146] Switching from the second single-drive operating state to the dual-drive operating state: The control method is used to control the transmission structure 100 to switch from the second single-drive operating state to the dual-drive operating state. The control method includes:

[0147] The first drive 10 is started, and the third coupling mechanism 83 is adjusted to the coupling state. The power of the first drive 10 and the second drive 20 is transmitted to the output shaft 60 through the first transmission mechanism 40, the sun gear 31, the planet gear 32, and the planet carrier 33 to meet the vehicle's requirements for dual-drive operation.

[0148] Switching from dual-drive operating state to the second single-drive operating state: A control method is used to control the transmission structure 100 to switch from the dual-drive operating state to the second single-drive operating state. The control method includes:

[0149] Adjust the third coupling mechanism 83 to the disconnected state and shut down the first driver 10 to meet the vehicle's requirements for the second single-drive working state.

[0150] Fifth, the switching between the second single-drive working state and the continuously variable transmission (CVT) working state is introduced.

[0151] Switching from the second single-drive operating state to the continuously variable transmission (CVT) operating state: A control method is used to control the transmission structure 100 to switch from the second single-drive operating state to the CVT operating state. The control method includes:

[0152] The first driver 10 is started, and the third coupling mechanism 83 is adjusted to the coupling state. The power of the first driver 10 is transmitted to the sun gear 31 through the first transmission mechanism 40.

[0153] Turn off the second driver 20, disconnect the second coupling mechanism 82, and adjust the first coupling mechanism 81 to the coupling state;

[0154] The second driver 20 is activated and the locking mechanism 70 is disengaged. The power of the second driver 20 passes sequentially through the second transmission mechanism 50 and the gear ring 34, and together with the power transmitted from the first driver 10 to the sun gear 31, it is transmitted to the output shaft 60 through the planet gear 32 and the planet carrier 33.

[0155] Switching from continuously variable transmission (CVT) operating state to the second single-drive operating state: A control method is used to control the transmission structure 100 to switch from the CVT operating state to the second single-drive operating state. The control method includes:

[0156] The third coupling mechanism 83 is switched off, the first driver 10 is turned off, the locking mechanism 70 is locked, the first coupling mechanism 81 is disconnected, and the second coupling mechanism 82 is adjusted to be in a coupled state. The power of the second driver 20 is transmitted to the output shaft 60 through the first transmission mechanism 40, the sun gear 31, the planet gear 32, and the planet carrier 33.

[0157] Sixth, the switching between the first single-drive working state and the second single-drive working state is introduced.

[0158] Switching from a first single-drive operating state to a second single-drive operating state: A control method is used to control the transmission structure 100 to switch from the first single-drive operating state to the second single-drive operating state. The control method includes:

[0159] Start the second driver 20, adjust the second coupling mechanism 82 to the coupling state, adjust the third coupling mechanism 83 to the disconnected state, and turn off the first driver 10. The power of the second driver 20 is transmitted to the output shaft 60 through the first transmission mechanism 40, the sun gear 31, the planet gear 32, and the planet carrier 33.

[0160] Switching from the second single-drive operating state to the first single-drive operating state: A control method is used to control the transmission structure 100 to switch from the second single-drive operating state to the first single-drive operating state. The control method includes:

[0161] Start the first driver 10, adjust the third coupling mechanism 83 to the coupling state, adjust the second coupling mechanism 82 to the disconnected state, and turn off the second driver 20. The power of the first driver 10 is transmitted to the output shaft 60 through the first transmission mechanism 40, the sun gear 31, the planet gear 32, and the planet carrier 33.

[0162] It is important to note that when switching states, the speed of the corresponding drive source should be controlled to avoid a jerky feeling.

[0163] By switching the states of the first coupling mechanism 81, the second coupling mechanism 82, the third coupling mechanism 83, and the locking mechanism 70 during the driving process, the four working states of the transmission structure 100 can be switched.

[0164] This application also provides a gearbox, which includes the aforementioned gear shifting structure 100 or a control method for executing the aforementioned gear shifting structure 100. This gearbox possesses all the beneficial effects of the aforementioned gear shifting structure 100 or the aforementioned control method for the gear shifting structure 100, which will not be elaborated further here.

[0165] This application also provides a vehicle that includes the aforementioned gearbox or transmission structure 100 or a control method for performing the aforementioned transmission structure 100. The vehicle has all the beneficial effects of the aforementioned gearbox or transmission structure 100 or the control method for performing the aforementioned transmission structure 100, which will not be repeated here.

[0166] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0167] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0168] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0169] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A speed-changing structure (100), characterized in that, The transmission structure (100) includes: First driver (10); Second drive (20); The planetary array (30) includes the sun gear (31), the gear ring (34), and the planet carrier (33); A first transmission mechanism (40) is connected to the sun gear (31) and the first driver (10), and the first transmission mechanism (40) includes an idler gear (43); The second transmission mechanism (50) is connected to the gear ring (34) and the second driver (20). The output shaft (60) is fixedly connected to the planetary carrier (33); The second coupling mechanism (82) is drivingly connected to the second driver (20) and the idler wheel (43), and the second coupling mechanism (82) can switch between a coupled state and a disconnected state; The second transmission mechanism (50) includes a first coupling mechanism (81), which can switch between a coupled state and a disconnected state; the first transmission mechanism (40) also includes a first driving gear (41) and a first driven gear (42) that is connected to the first driving gear (41) in a transmission, and the first driven gear (42) is fixedly connected to the sun gear (31); The idler gear (43) is driven to mesh between the first driving gear (41) and the first driven gear (42).

2. The transmission structure (100) according to claim 1, characterized in that, The transmission structure (100) also includes a locking mechanism (70) for disengagingly locking the gear ring (34).

3. The speed-changing structure (100) according to claim 2, characterized in that, The transmission structure (100) further includes a third coupling mechanism (83) connecting the first driver (10) and the first drive gear (41), the third coupling mechanism (83) being able to switch between a coupled state and a disconnected state.

4. The transmission structure (100) according to claim 1, characterized in that, The first transmission mechanism (40) includes a first spline, which connects the first driven gear (42) to the sun gear (31).

5. The transmission structure (100) according to any one of claims 3 and 4, characterized in that, The second transmission mechanism (50) further includes a transmission gear set (51), which connects the second driver (20) and the first coupling mechanism (81).

6. The speed-changing structure (100) according to claim 5, characterized in that, The transmission gear set (51) includes a second driving gear (52) and a second driven gear (53) that is connected to the second driving gear (52). The second driving gear (52) is connected to the second driver (20), and the second driven gear (53) is connected to the first coupling mechanism (81).

7. The transmission structure (100) according to claim 5, characterized in that, The first coupling mechanism (81) includes a sliding sleeve (811), a first engaging tooth (812), and a second engaging tooth (813). The sliding sleeve (811) is slidable to switch the first engaging tooth (812) and the second engaging tooth (813) between a coupled state and a disconnected state.

8. The transmission structure (100) according to any one of claims 1-4, characterized in that, The first driver (10) is an engine or motor, and the second driver (20) is a motor.

9. The transmission structure (100) according to claim 3, characterized in that, The transmission structure (100) includes a first single-drive working state, a second single-drive working state, a dual-drive working state, or a continuously variable transmission working state. When the transmission structure (100) is in the first single-drive working state, the locking mechanism (70) is in the locked state of the gear ring (34), the first coupling mechanism (81) and the second coupling mechanism (82) are in the disconnected state, the third coupling mechanism (83) is in the coupled state, and the power of the first driver (10) is transmitted to the output shaft (60) in sequence through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33); When the transmission structure (100) is in the second single-drive working state, the locking mechanism (70) is in the locked state of the gear ring (34), the first coupling mechanism (81) and the third coupling mechanism (83) are in the disconnected state, the second coupling mechanism (82) is in the coupled state, and the power of the second drive (20) is transmitted to the output shaft (60) in sequence through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33); When the transmission structure (100) is in the dual-drive working state, the locking mechanism (70) is in the locked state of the gear ring (34), the first coupling mechanism (81) is in the disconnected state, the second coupling mechanism (82) and the third coupling mechanism (83) are in the coupled state, and the power of the first driver (10) and the second driver (20) is transmitted to the output shaft (60) in sequence through the first transmission mechanism (40), the sun gear (31), the planet gear (32) and the planet carrier (33); When the transmission structure (100) is in the continuously variable transmission working state, the locking mechanism (70) is in the open state, the first coupling mechanism (81) and the third coupling mechanism (83) are in the coupled state, the second coupling mechanism (82) is in the open state, the drive of the first driver (10) is transmitted to the sun gear (31) through the first transmission mechanism (40), the power of the second driver (20) is transmitted to the ring gear (34) through the second transmission mechanism (50), and the sun gear (31) and the ring gear (34) transmit the power to the output shaft (60) through the planet gear (32) and the planet carrier (33).

10. A control method for a variable speed structure, characterized in that, The control method is applied to the transmission structure (100) as described in claim 9, and the control method is used to control the transmission structure (100) to switch between two of the four states: the first single-drive working state, the second single-drive working state, the dual-drive working state, and the continuously variable transmission working state.

11. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the first single-drive operating state to the dual-drive operating state, and the control method includes: Start the second driver (20), adjust the second coupling mechanism (82) to the coupling state, and the power of the first driver (10) and the second driver (20) is transmitted to the output shaft (60) through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33).

12. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the dual-drive operating state to the first single-drive operating state, and the control method includes: Adjust the second coupling mechanism (82) to the disconnected state and turn off the second driver (20).

13. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the dual-drive working state to the continuously variable transmission working state. The control method includes: Adjust the second coupling mechanism (82) to the disconnected state and turn off the second driver (20); Adjust the first coupling mechanism (81) to the coupling state; The second driver (20) is started and the locking mechanism (70) is disengaged. The power of the second driver (20) passes through the second transmission mechanism (50) and the gear ring (34) in sequence, and together with the power transmitted from the first driver (10) to the sun gear (31), it is transmitted to the output shaft (60) through the planet gear (32) and the planet carrier (33).

14. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the continuously variable transmission working state to the dual drive working state. The control method includes: turning off the second drive (20) and adjusting the locking mechanism (70) to lock the gear ring (34). Adjust the first coupling mechanism (81) to the disconnected state; The second driver (20) is started and the second coupling mechanism (82) is controlled to couple. The power of the first driver (10) and the second driver (20) is transmitted to the output shaft (60) through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33).

15. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the first single-drive working state to the continuously variable transmission working state. The control method includes: Adjust the first coupling mechanism (81) to the coupling state; Start the second drive (20) and disconnect the locking mechanism (70). The power of the second drive (20) passes through the second transmission mechanism (50) and the gear ring (34) in sequence, and together with the power transmitted from the first drive (10) to the sun gear (31), it is transmitted to the output shaft (60) through the planet gear (32) and the planet carrier (33).

16. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the continuously variable transmission (CVT) operating state to the first single-drive operating state. The control method includes: The second driver (20) is turned off, and the locking mechanism (70) is adjusted to lock the gear ring (34).

17. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the second single-drive operating state to the dual-drive operating state. The control method includes: Start the first driver (10), adjust the third coupling mechanism (83) to the coupling state, and the power of the first driver (10) and the second driver (20) is transmitted to the output shaft (60) through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33).

18. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the dual-drive operating state to the second single-drive operating state, and the control method includes: Adjust the third coupling mechanism (83) to the disconnected state and turn off the first driver (10).

19. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the second single-drive working state to the continuously variable transmission working state. The control method includes: Start the first driver (10), adjust the third coupling mechanism (83) to the coupling state, and the power of the first driver (10) is transmitted to the sun gear (31) through the first transmission mechanism (40); Turn off the second driver (20), disconnect the second coupling mechanism (82), and adjust the first coupling mechanism (81) to the coupling state; The second driver (20) is started and the locking mechanism (70) is disengaged. The power of the second driver (20) passes through the second transmission mechanism (50) and the gear ring (34) in sequence, and together with the power transmitted from the first driver (10) to the sun gear (31), it is transmitted to the output shaft (60) through the planet gear (32) and the planet carrier (33).

20. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the continuously variable transmission (CVT) operating state to the second single-drive operating state. The control method includes: The third coupling mechanism (83) is switched off, the first driver (10) is turned off, and the locking mechanism (70) is locked. The first coupling mechanism (81) is disconnected, and the second coupling mechanism (82) is adjusted to be in a coupled state. The power of the second driver (20) is transmitted to the output shaft (60) through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33).

21. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the first single-drive operating state to the second single-drive operating state, and the control method includes: Start the second driver (20), adjust the second coupling mechanism (82) to the coupling state, adjust the third coupling mechanism (83) to the disconnect state, and turn off the first driver (10). The power of the second driver (20) is transmitted to the output shaft (60) through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33).

22. The control method according to claim 10, characterized in that, The control method is used to control the transmission structure (100) to switch from the second single-drive operating state to the first single-drive operating state. The control method includes: Start the first driver (10), adjust the third coupling mechanism (83) to the coupling state, adjust the second coupling mechanism (82) to the disconnect state, and turn off the second driver (20). The power of the first driver (10) is transmitted to the output shaft (60) through the first transmission mechanism (40), the sun gear (31), the planet gear (32), and the planet carrier (33).

23. A gearbox, characterized in that, The gearbox includes a transmission structure (100) as described in any one of claims 1-9, or a control method for performing a transmission structure (100) as described in any one of claims 10-22.

24. A vehicle, characterized in that, The vehicle includes the gearbox as claimed in claim 23, or the transmission structure (100) as claimed in any one of claims 1-9, or a control method for performing the transmission structure (100) as claimed in any one of claims 10-22.

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