Transmission device, driving device, driving system and vehicle

Abstract

The utility model discloses a transmission device, a driving device, a driving system and a vehicle. The transmission device comprises a planetary gear mechanism, double clutches and a variable-speed transmission mechanism. The planetary gear mechanism is in transmission connection with an engine; the planetary gear mechanism is suitable for being in transmission connection or disconnection with a motor through a clutch; the planetary gear mechanism is in transmission connection with the variable-speed transmission mechanism; when the transmission device is in the first driving mode, the planetary gear mechanism is in transmission connection with the engine and is also in transmission connection with the motor through the clutch, and after power output by the engine is transmitted to the planetary gear mechanism, part of the power drives the variable speed transmission mechanism to operate through the planetary gear mechanism; and the other part of power sequentially passes through a planetary gear mechanism and a clutch to drive a motor to generate electricity. According to the transmission device, the situation that the engine cannot drive the axle of the vehicle to operate in a series drive mode in the prior art is avoided, the vehicle comprising the transmission device can achieve four-wheel drive, and the drive capacity of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of drive technology, and more particularly to a transmission device, a drive device, a drive system, and a vehicle. Background Art

[0002] In new energy vehicles, hybrid vehicles have become a hot research object in the automotive industry due to their advantages of low fuel consumption and high cruising range. Correspondingly, the transmission devices of hybrid vehicles have also received extensive attention.

[0003] In the related art, when the transmission device of a hybrid vehicle is in the series drive mode, all the mechanical energy output by the engine is used to be transmitted to the motor for power generation. At this time, the engine cannot drive the axle of the vehicle to operate. Therefore, the hybrid vehicle can only achieve two-wheel drive in the series drive mode, and the driving ability is weak.

[0004] In view of the existence of the above technical problems, the present application provides a new transmission device, drive device, drive system, and vehicle. Summary of the Utility Model

[0005] The present application is proposed to solve at least one of the above problems. According to one aspect of the present application, a transmission device is provided. The transmission device includes: a planetary gear mechanism, a dual clutch, and a variable speed transmission mechanism; the planetary gear mechanism is used for being in transmission connection with the engine; the planetary gear mechanism is adapted to be in transmission connection with or disconnected from the motor through the clutch; the planetary gear mechanism is in transmission connection with the variable speed transmission mechanism; wherein, when the transmission device is in the first drive mode, the planetary gear mechanism is both in transmission connection with the engine and in transmission connection with the motor through the clutch. After the power output by the engine is transmitted to the planetary gear mechanism, a part of the power drives the variable speed transmission mechanism to operate through the planetary gear mechanism, and another part of the power drives the motor to generate electricity in sequence through the planetary gear mechanism and the clutch.

[0006] In some embodiments of the present application, when the transmission device is in the second drive mode, the planetary gear mechanism is both in transmission connection with the engine and in transmission connection with the motor through the clutch. The power output by the engine and the power output by the motor are jointly transmitted to the planetary gear mechanism to enable the planetary gear mechanism to drive the variable speed transmission mechanism to operate.

[0007] In some embodiments of the present application, the clutch is a dual clutch, and the dual clutch includes a first clutch and a second clutch; the first input end of the planetary gear mechanism is used for driving connection with the engine, so that the power output by the engine is transmitted to the planetary gear mechanism through the first input end; the second input end of the planetary gear mechanism is used for driving connection or disconnection with the motor through the first clutch, and / or, the third input end of the planetary gear mechanism is used for driving connection or disconnection with the motor through the second clutch; the output end of the planetary gear mechanism is in driving connection with the input end of the speed change transmission mechanism, and the output end of the speed change transmission mechanism is used for connecting to the axle of the vehicle, so that the planetary gear mechanism drives the axle to operate through the speed change transmission mechanism.

[0008] In some embodiments of the present application, when the first input end of the planetary gear mechanism is in driving connection with the engine, the second input end of the planetary gear mechanism is disconnected from the motor through the first clutch, and the third input end of the planetary gear mechanism is in driving connection with the motor through the second clutch, so that part of the power output by the engine can drive the motor to generate electricity after passing through the planetary gear mechanism and the second clutch in sequence.

[0009] In some embodiments of the present application, when the first input end of the planetary gear mechanism is in driving connection with the engine, the second input end of the planetary gear mechanism is in driving connection with the motor through the first clutch, so that the power output by the motor can be transmitted to the planetary gear mechanism, and further the planetary gear mechanism drives the speed change transmission mechanism to operate.

[0010] In some embodiments of the present application, the planetary gear mechanism includes: a planet carrier, a ring gear, a sun gear and planet gears; the planet carrier, the ring gear and the sun gear are coaxially arranged, and the sun gear and the planet gears are arranged inside the ring gear; the input end of the planet carrier is in driving connection with the engine, and the output end of the planet carrier is connected to the gear shaft of the planet gear; the planet gears are arranged around the sun gear, and the planet gears are meshed with the internal teeth of the sun gear and the ring gear; the ring gear is in driving connection or disconnection with the motor through the first clutch; the gear shaft of the sun gear is in driving connection or disconnection with the motor through the second clutch.

[0011] In some embodiments of the present application, the transmission device further includes: a brake, and the brake is in driving connection or disconnection with the gear shaft of the sun gear.

[0012] In some embodiments of the present application, the first driving mode is a power split driving mode, and the second driving mode is a first parallel driving mode or a second parallel driving mode; the transmission can be switched between multiple driving modes through the brake, the dual clutch and the planetary gear mechanism, and the driving modes include a pure electric driving mode, an engine direct driving mode, a power split driving mode, a first parallel driving mode, and a second parallel driving mode.

[0013] In some embodiments of the present application, in the pure electric driving mode, the brake is disconnected from the gear shaft of the sun gear; the ring gear is drivingly connected to the motor through the first clutch; the gear shaft of the sun gear is disconnected from the motor through the second clutch.

[0014] In some embodiments of the present application, in the engine direct driving mode, the brake is drivingly connected to the gear shaft of the sun gear; the ring gear is disconnected from the motor through the first clutch; the gear shaft of the sun gear is disconnected from the motor through the second clutch.

[0015] In some embodiments of the present application, in the power split driving mode, the brake is disconnected from the gear shaft of the sun gear; the ring gear is disconnected from the motor through the first clutch; the gear shaft of the sun gear is drivingly connected to the motor through the second clutch.

[0016] In some embodiments of the present application, in the first parallel driving mode, the brake is disconnected from the gear shaft of the sun gear; the ring gear is drivingly connected to the motor through the first clutch; the gear shaft of the sun gear is drivingly connected to the motor through the second clutch.

[0017] In some embodiments of the present application, in the second parallel driving mode, the brake is drivingly connected to the gear shaft of the sun gear; the ring gear is drivingly connected to the motor through the first clutch; the gear shaft of the sun gear is disconnected from the motor through the second clutch.

[0018] In some embodiments of the present application, the speed change transmission mechanism includes: a first-stage reduction driven gear connected to the output end of the planetary gear mechanism; a main reduction drive gear coaxial with the first-stage reduction driven gear; a main reduction driven gear meshing with the main reduction drive gear, and the gear shaft of the main reduction driven gear is drivingly connected to the axle; a differential is provided on the gear shaft of the main reduction driven gear.

[0019] According to another aspect of the present application, a driving device is provided, and the driving device includes an engine, a motor, and the transmission according to any one of the above.

[0020] According to another aspect of the present application, a drive system is provided. The drive system includes a front drive device and a rear drive device, and at least one of the front drive device and the rear drive device is the drive device described above.

[0021] According to another aspect of the present application, a vehicle is provided. The vehicle includes the drive system described above.

[0022] For the transmission device, drive device, drive system and vehicle according to the embodiments of the present application, by directly connecting the planetary gear mechanism to the variable speed transmission mechanism, when both the engine and the motor are connected to the planetary gear mechanism, even when part of the power output by the engine drives the motor to generate electricity, the other part of the power output by the engine can still drive the variable speed transmission mechanism through the planetary gear mechanism, and then drive the axle connected to the variable speed transmission mechanism to operate, avoiding the situation in the related art where the engine cannot drive the axle of the vehicle in the series drive mode, enabling the vehicle including the transmission device of the present application to achieve four-wheel drive and improving the driving ability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By describing the embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0024] Figure 1 The schematic structural diagram of the drive system provided according to an embodiment of the present application is shown.

[0025] Figure 2 The schematic diagram of the transmission device in the pure electric drive mode in the drive system provided according to an embodiment of the present application is shown.

[0026] Figure 3 The schematic diagram of the transmission device in the engine direct drive mode in the drive system provided according to an embodiment of the present application is shown.

[0027] Figure 4 The schematic diagram of the transmission device in the power split drive mode in the drive system provided according to an embodiment of the present application is shown.

[0028] Figure 5 The schematic diagram of the transmission device in the first parallel drive mode in the drive system provided according to an embodiment of the present application is shown.

[0029] Figure 6Shows a schematic diagram of the transmission device in the second parallel drive mode in the drive system provided according to an embodiment of the present application.

[0030] Figure 7 Shows a schematic diagram of the drive system in the pure electric two-wheel drive mode provided according to an embodiment of the present application.

[0031] In the drawings:

[0032] 1 Motor

[0033] 2 Motor shaft

[0034] 3 Second clutch

[0035] 4 First clutch

[0036] 5 Ring gear

[0037] 6 Planet gear

[0038] 7 Planet carrier

[0039] 8 Engine shaft

[0040] 9 Engine

[0041] 10 Sun gear

[0042] 11 External teeth

[0043] 12 First-stage reduction driven gear

[0044] 13 Rotating shaft

[0045] 14 Differential

[0046] 15 Left rear wheel

[0047] 16 Right rear wheel

[0048] 17 Electric drive device

[0049] 18 Main reduction driven gear

[0050] 19 Main reduction driving gear

[0051] 20 Brake Detailed implementation manners

[0052] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0053] It should be understood that the present application can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present application to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. Like reference numerals denote like elements throughout.

[0054] It should be understood that when an element or layer is referred to as being "on", "adjacent to", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on", "directly adjacent to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Thus, a first element, component, region, layer or part discussed below may be denoted as a second element, component, region, layer or part without departing from the teachings of the present application.

[0055] Spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "upper", etc. may be used herein for convenience in describing the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relationship terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, then an element or feature described as "under" or "beneath" or "underneath" another element or feature will be oriented "above" the other element or feature. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0056] In the related art, when the transmission of a hybrid vehicle is in the series drive mode, all the mechanical energy output by the engine is used to be transmitted to the motor for power generation. At this time, the engine cannot drive the axle of the vehicle to operate. Therefore, the hybrid vehicle can only achieve two-wheel drive in the series drive mode, and the driving ability is weak.

[0057] Moreover, in the above process, the energy output by the engine needs to be converted twice to drive the vehicle to run, and the energy loss is large.

[0058] To solve at least one of the above problems, the present application provides a transmission device, comprising: a planetary gear mechanism, a dual clutch, and a speed change transmission mechanism; the planetary gear mechanism is used for driving connection with an engine; the planetary gear mechanism is adapted to be drivingly connected or disconnected from a motor through the clutch; the planetary gear mechanism is drivingly connected with the speed change transmission mechanism; wherein, when the transmission device is in a first driving mode, the planetary gear mechanism is both drivingly connected with the engine and drivingly connected with the motor through the clutch, after the power output by the engine is transmitted to the planetary gear mechanism, a part of the power drives the speed change transmission mechanism to operate through the planetary gear mechanism, and another part of the power drives the motor to generate electricity in sequence through the planetary gear mechanism and the clutch.

[0059] According to the transmission device of the present application, by directly connecting the planetary gear mechanism with the speed change transmission mechanism, when both the engine and the motor are connected with the planetary gear mechanism, even when a part of the power output by the engine drives the motor to generate electricity, another part of the power output by the engine can still drive the speed change transmission mechanism through the planetary gear mechanism, and further drive the axle connected to the speed change transmission mechanism to operate, avoiding the situation that the engine cannot drive the axle of the vehicle in the series driving mode in the related art, enabling the vehicle including the transmission device of the present application to achieve four-wheel drive and improving the driving ability of the vehicle.

[0060] To thoroughly understand the present application, detailed structures will be presented in the following description to illustrate the technical solutions proposed by the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation manners.

[0061] The following refers to Figure 1 Describe the transmission device according to an embodiment of the present application. The transmission device provided by the embodiment of the present application includes: a planetary gear mechanism, a dual clutch, and a speed change transmission mechanism; the planetary gear mechanism is used for driving connection with an engine 9; the planetary gear mechanism is adapted to be drivingly connected or disconnected from a motor 1 through a clutch; the planetary gear mechanism is drivingly connected with the speed change transmission mechanism; wherein, when the transmission device is in a first driving mode, the planetary gear mechanism is both drivingly connected with the engine 9 and drivingly connected with the motor 1 through the clutch, after the power output by the engine 9 is transmitted to the planetary gear mechanism, a part of the power drives the speed change transmission mechanism to operate through the planetary gear mechanism, and another part of the power drives the motor 1 to generate electricity in sequence through the planetary gear mechanism and the clutch.

[0062] According to the transmission device of the present application, by directly connecting the planetary gear mechanism to the variable-speed transmission mechanism, when both the engine and the motor are connected to the planetary gear mechanism, even when a part of the power output by the engine drives the motor to generate electricity, the other part of the power output by the engine can still drive the variable-speed transmission mechanism through the planetary gear mechanism, and then drive the axle connected to the variable-speed transmission mechanism to operate, avoiding the situation in the related art where the engine cannot drive the axle of the vehicle in the series drive mode, enabling the vehicle including the transmission device of the present application to achieve four-wheel drive and improving the driving ability of the vehicle.

[0063] In some embodiments, when the transmission device is in the second drive mode, the planetary gear mechanism is both drivingly connected to the engine 9 and drivingly connected to the motor 1 through a clutch. The power output by the engine 9 and the power output by the motor 1 are jointly transmitted to the planetary gear mechanism to cause the planetary gear mechanism to drive the variable-speed transmission mechanism to operate. In this mode, the engine 9 and the motor 1 can be jointly used to drive the vehicle to operate, which can greatly improve the driving force on the vehicle.

[0064] In some embodiments, the clutch is a dual clutch, and the dual clutch includes a first clutch 4 and a second clutch 3; the first input end of the planetary gear mechanism is used to be drivingly connected to the engine 9 so that the power output by the engine 9 is transmitted to the planetary gear mechanism through the first input end; the second input end of the planetary gear mechanism is used to be drivingly connected to or disconnected from the motor 1 through the first clutch 4, and / or, the third input end of the planetary gear mechanism is used to be drivingly connected to or disconnected from the motor 1 through the second clutch 3; the output end of the planetary gear mechanism is drivingly connected to the input end of the variable-speed transmission mechanism, and the output end of the variable-speed transmission mechanism is used to connect to the axle of the vehicle so that the planetary gear mechanism drives the axle to operate through the variable-speed transmission mechanism.

[0065] Wherein, when the first input end of the planetary gear mechanism is drivingly connected to the engine 9, the second input end of the planetary gear mechanism is disconnected from the motor 1 through the first clutch 4, and the third input end of the planetary gear mechanism is drivingly connected to the motor 1 through the second clutch 3. At this time, the transmission device is in the first drive mode, and a part of the power output by the engine 9 can sequentially pass through the planetary gear mechanism and the second clutch to drive the motor 1 to rotate in the reverse direction to drive the motor 1 to generate electricity. At the same time, another part of the power of the engine 9 can directly drive the variable-speed transmission mechanism to operate through the planetary gear mechanism, thereby driving the vehicle to operate.

[0066] When the first input end of the planetary gear mechanism is drivingly connected to the engine 9, the second input end of the planetary gear mechanism is drivingly connected to the motor 1 through the first clutch 4. At this time, the transmission device is in the second driving mode, and the power output by the motor 1 can be transmitted to the planetary gear mechanism, so that the planetary gear mechanism drives the variable speed transmission mechanism to operate. At the same time, the power output by the engine 9 can also be transmitted to the planetary gear mechanism, so that the planetary gear mechanism drives the variable speed transmission mechanism to operate, so that the engine 9 and the motor 1 can jointly drive the axle to operate, improving the driving ability of the vehicle.

[0067] In an embodiment of the present application, by setting a dual clutch, the transmission device can have working modes such as a pure electric drive mode, an engine direct drive mode, a power split drive mode, and a parallel drive mode. Among them, the first drive mode is the power split drive mode, and the second drive mode is the parallel drive mode (specifically, it can be the first parallel drive mode or the second parallel drive mode in the following text. For details, please refer to the description below and will not be elaborated here).

[0068] In the pure electric drive mode, the engine 9 does not operate. The second input end of the planetary gear mechanism is drivingly connected to the motor 1 through the first clutch 4, and the third input end of the planetary gear mechanism is disconnected from the motor 1 through the second clutch 3. The power output by the motor 1 is input to the planetary gear mechanism through the first clutch 4, and then the planetary gear mechanism transmits the power to the variable speed transmission mechanism, and then drives the axle connected thereto to operate through the variable speed transmission mechanism.

[0069] In the engine direct drive mode, the second input end of the planetary gear mechanism is disconnected from the motor 1 through the first clutch 4, and the third input end of the planetary gear mechanism is disconnected from the motor 1 through the second clutch 3. The engine 9 operates, and the power output by it is input to the planetary gear mechanism through the first input end, and then the planetary gear mechanism transmits the power to the variable speed transmission mechanism, and then drives the axle connected thereto to operate through the variable speed transmission mechanism.

[0070] In the power split drive mode, the second input end of the planetary gear mechanism is disconnected from the motor 1 through the first clutch 4, and the third input end of the planetary gear mechanism is drivingly connected to the motor 1 through the second clutch 3. The engine 9 operates, and the power output by it is input to the planetary gear mechanism through the first input end. Part of the power is transmitted by the planetary gear mechanism to the variable speed transmission mechanism, and then drives the axle connected thereto to operate through the variable speed transmission mechanism. Another part of the power is transmitted by the planetary gear mechanism to the motor 1 through the second clutch 3 to drive the motor 1 to generate electricity.

[0071] In the parallel drive mode, the second input end of the planetary gear mechanism is drivingly connected to the motor 1 through the first clutch 4. The engine 9 and the motor 1 operate simultaneously. The power output by the engine 9 is input into the planetary gear mechanism through the first input end, and the power output by the motor 1 is also input into the planetary gear mechanism through the first clutch 4. Then, the planetary gear mechanism transmits the power to the variable speed drive mechanism, and further drives the axle connected thereto to operate through the variable speed drive mechanism.

[0072] Based on this, for the transmission device of the present application, in the pure electric drive mode, the motor 1 directly outputs mechanical energy to drive the axle to operate; in the engine direct drive mode, the engine 9 directly outputs mechanical energy to drive the axle to operate; in the power split drive mode, a part of the mechanical energy output by the engine 9 drives the axle to operate, and a part is converted into electrical energy through the motor 1; in the parallel drive mode, both the engine 9 and the motor 1 directly output mechanical energy to drive the axle to operate. In addition to avoiding the situation in the related art where the engine cannot drive the axle of the vehicle in the series drive mode, the transmission device of the present application also avoids that the energy output by the engine 9 needs to be converted twice to drive the vehicle to operate, reduces the loss caused by the secondary energy conversion, and improves the drive efficiency.

[0073] Moreover, the transmission device of the present application can drive an axle of the vehicle in the pure electric drive mode, the engine direct drive mode, the power split drive mode, and the parallel drive mode. Therefore, the transmission device of the present application can cooperate with another transmission device to enable the vehicle to achieve four-wheel drive in all modes, which can improve the vehicle's ability to get out of trouble.

[0074] In some embodiments, as Figure 1 shown, the planetary gear mechanism includes: a planet carrier 7, a ring gear 5, a sun gear 10, and planet gears 6; the planet carrier 7, the ring gear 5, and the sun gear 10 are coaxially arranged, and the sun gear 10 and the planet gears 6 are arranged inside the ring gear 5; the input end of the planet carrier 7 is drivingly connected to the engine 9, and the output end of the planet carrier 7 is connected to the gear shaft of the planet gears 6; the planet gears 6 are arranged around the sun gear 10, and the planet gears 6 mesh with the sun gear 10 and the internal teeth of the ring gear 5; the ring gear 5 is drivingly connected or disconnected from the motor 1 through the first clutch 4; the gear shaft of the sun gear 10 is drivingly connected or disconnected from the motor 1 through the second clutch 3.

[0075] Among them, the input end of the planet carrier 7 can be the first input end of the planetary gear mechanism. The engine 9 can be connected to the input end of the planet carrier 7 through the engine shaft 8. The ring gear 5 can be the second input end of the planetary gear mechanism. The motor 1 can be connected to the dual clutch through the motor shaft 2. When the first clutch 4 is combined with the ring gear 5, the motor 1 is drivingly connected to the second input end of the planetary gear mechanism through the first clutch 4. When the first clutch 4 is separated from the ring gear 5, the motor 1 is disconnected from the second input end of the planetary gear mechanism through the first clutch 4. The gear shaft of the sun gear 10 can be the third input end of the planetary gear mechanism. When the second clutch 3 is combined with the gear shaft of the sun gear 10, the motor 1 is drivingly connected to the third input end of the planetary gear mechanism through the second clutch 3. When the second clutch 3 is separated from the gear shaft of the sun gear 10, the motor 1 is disconnected from the third input end of the planetary gear mechanism through the second clutch 3. The external teeth 11 of the ring gear 5 can be the output end of the planetary gear mechanism.

[0076] In some embodiments, as Figure 1 shown, the transmission device further includes: a brake 20, which is drivingly connected or disconnected from the gear shaft of the sun gear 10.

[0077] When the brake 20 is drivingly connected to the gear shaft of the sun gear 10, the brake 20 can limit the rotation of the sun gear 10. When the brake 20 is disconnected from the gear shaft of the sun gear 10, the sun gear 10 is not restricted by the brake 20 and can rotate under the driving action of other power.

[0078] In some embodiments, as Figure 1 shown, the speed change transmission mechanism includes: a first-stage reduction driven gear 12, which is connected to the output end of the planetary gear mechanism; a main reduction driving gear 19, which is coaxial with the first-stage reduction driven gear 12; a main reduction driven gear 18, which meshes with the main reduction driving gear 19, and the gear shaft of the main reduction driven gear 18 is drivingly connected to the axle; a differential 14, which is arranged on the gear shaft of the main reduction driven gear 18.

[0079] Among them, the output end of the planetary gear mechanism can be the external teeth 11 of the ring gear 5, and the first-stage reduction driven gear 12 is meshed and connected with the external teeth 11 of the ring gear 5. When power is transmitted, the planetary gear mechanism can transmit the power output by the engine 9 and / or the motor 1 to the first-stage reduction driven gear 12 through the external teeth 11 of the ring gear 5 to drive the first-stage reduction driven gear 12 to rotate. The first-stage reduction driven gear 12 and the main reduction driving gear 19 are arranged on the same rotating shaft 13. The first-stage reduction driven gear 12 drives the main reduction driving gear 19 to rotate through the rotating shaft 13, and the main reduction driving gear 19 further drives the main reduction driven gear 18 meshed with it to rotate. The gear shaft of the main reduction driven gear 18 is in transmission connection with the axle, so as to drive the axle to operate through the rotation of the main reduction driven gear 18.

[0080] In some embodiments, through the brake 20, the dual clutch and the planetary gear mechanism, the transmission device can perform mode switching under multiple driving modes. The driving modes include pure electric driving mode, engine direct driving mode, power split driving mode, first parallel driving mode, and second parallel driving mode. For example, switching from the pure electric driving mode to the power split driving mode, switching from the pure electric driving mode to the first parallel driving mode, etc., which are not limited herein.

[0081] In some embodiments, in the pure electric driving mode, the brake 20 is disconnected from the gear shaft of the sun gear 10; the ring gear 5 is in transmission connection with the motor 1 through the first clutch 4; the gear shaft of the sun gear 10 is disconnected from the motor 1 through the second clutch 3.

[0082] Specifically, the power transmission process in the pure electric driving mode can refer to Figure 2 the arrow direction in. In the pure electric driving mode, the engine 9 does not operate, the brake 20 is disconnected from the gear shaft of the sun gear 10, the first clutch 4 is combined with the ring gear 5 so that the motor 1 is in transmission connection with the second input end of the planetary gear mechanism through the first clutch 4, and the second clutch 3 is separated from the gear shaft of the sun gear 10 so that the motor 1 is disconnected from the third input end of the planetary gear mechanism through the second clutch 3. The power output by the motor 1 is transmitted to the ring gear 5 through the first clutch 4, and the ring gear 5 further transmits the power to the speed change transmission mechanism, and the speed change transmission mechanism drives the axle to operate.

[0083] It should be noted that in the transmission device in the related art in the pure electric driving mode, the motor 1 needs to be decelerated by the planetary gear set and then transmitted to the wheel end through two-stage reduction. There are many transmission chains, low transmission efficiency, and at the same time, there are idling of the second gear input gear, second gear output gear, etc., resulting in efficiency loss. In this embodiment, through the connection mode of the planetary gear set and the dual clutch, only by controlling the first clutch 4 in the dual clutch to be closed can the pure electric driving mode be realized. The control is simple, the transmission path is short, and the driving efficiency is higher.

[0084] In some embodiments, in the engine direct drive mode, the brake 20 is drivingly connected to the gear shaft of the sun gear 10; the ring gear 5 is disconnected from the motor 1 through the first clutch 4; the gear shaft of the sun gear 10 is disconnected from the motor 1 through the second clutch 3.

[0085] Specifically, the power transmission process in the engine direct drive mode can be referred to Figure 3 the arrow direction in. In the engine direct drive mode, the brake 20 is drivingly connected to the gear shaft of the sun gear 10, the first clutch 4 is disengaged from the ring gear 5 to disconnect the motor 1 from the second input end of the planetary gear mechanism through the first clutch 4, and the second clutch 3 is disengaged from the gear shaft of the sun gear 10 to disconnect the motor 1 from the third input end of the planetary gear mechanism through the second clutch 3. The power output by the engine 9 is transmitted to the ring gear 5 through the planet carrier 7, and the ring gear 5 further transmits the power to the speed change transmission mechanism, which drives the axle to operate.

[0086] It should be noted that in the related art, when the transmission device is most suitable for the engine 9 to directly drive during medium and high-speed cruising, the motor 1 cannot be disconnected, and zero torque control needs to be performed on the motor 1, increasing additional losses. In this embodiment, through the connection method of the planetary gear set and the dual clutch, controlling the first clutch 4 in the dual clutch to open can achieve the engine direct drive mode. In the engine direct drive mode, the motor 1 can be disengaged, and zero torque control does not need to be performed on the motor 1, reducing losses.

[0087] In some embodiments, in the power split drive mode, the brake 20 is disconnected from the gear shaft of the sun gear 10; the ring gear 5 is disconnected from the motor 1 through the first clutch 4; the gear shaft of the sun gear 10 is drivingly connected to the motor 1 through the second clutch 3.

[0088] Specifically, the power transmission process in the power split drive mode can be referred to Figure 4 the arrow direction in. In the power split drive mode, the brake 20 is disconnected from the gear shaft of the sun gear 10, the first clutch 4 is disengaged from the ring gear 5 to disconnect the motor 1 from the second input end of the planetary gear mechanism through the first clutch 4, and the second clutch 3 is engaged with the gear shaft of the sun gear 10 to drive the motor 1 to be drivingly connected to the third input end of the planetary gear mechanism through the second clutch 3. The power output by the engine 9 is transmitted to the ring gear 5 through the planet carrier 7, the external teeth 11 of the ring gear 5 drive the speed change transmission mechanism, which drives the axle to operate, the internal teeth of the ring gear 5 drive the sun gear 10 to rotate through the planet gear 6, and the gear shaft of the sun gear 10 further drives the motor 1 to rotate in the reverse direction through the second clutch 3 to drive the motor 1 to generate electricity.

[0089] In some embodiments, in the first parallel drive mode, the brake 20 is disconnected from the gear shaft of the sun gear 10; the ring gear 5 is drivingly connected to the motor 1 through the first clutch 4; the gear shaft of the sun gear 10 is drivingly connected to the motor 1 through the second clutch 3.

[0090] Specifically, the power transmission process in the first parallel drive mode can be referred to Figure 5 for the arrow directions in it. In the first parallel drive mode, the brake 20 is disconnected from the gear shaft of the sun gear 10, and the first clutch 4 is engaged with the ring gear 5 so that the motor 1 is drivingly connected to the second input end of the planetary gear mechanism through the first clutch 4, and the second clutch 3 is engaged with the gear shaft of the sun gear 10 so that the motor 1 is drivingly connected to the third input end of the planetary gear mechanism through the second clutch 3. The engine 9 and the motor 1 output power simultaneously. The power output by the engine 9 is transmitted to the ring gear 5 through the planet carrier 7, and the power output by the motor 1 is also transmitted to the ring gear 5 through the first clutch 4. The ring gear 5 then transmits the power to the speed change transmission mechanism, and the speed change transmission mechanism drives the axle to operate.

[0091] In some embodiments, in the second parallel drive mode, the brake 20 is drivingly connected to the gear shaft of the sun gear 10; the ring gear 5 is drivingly connected to the motor 1 through the first clutch 4; the gear shaft of the sun gear 10 is disconnected from the motor 1 through the second clutch 3.

[0092] Specifically, the power transmission process in the second parallel drive mode can be referred to Figure 6 for the arrow directions in it. In the second parallel drive mode, the brake 20 is drivingly connected to the gear shaft of the sun gear 10, and the first clutch 4 is engaged with the ring gear 5 so that the motor 1 is drivingly connected to the second input end of the planetary gear mechanism through the first clutch 4, and the second clutch 3 is disengaged from the gear shaft of the sun gear 10 so that the motor 1 is disconnected from the third input end of the planetary gear mechanism through the second clutch 3. The engine 9 and the motor 1 output power simultaneously. The power output by the engine 9 is transmitted to the ring gear 5 through the planet carrier 7, and the power output by the motor 1 is also transmitted to the ring gear 5 through the first clutch 4. The ring gear 5 then transmits the power to the speed change transmission mechanism, and the speed change transmission mechanism drives the axle to operate. Compared with the first parallel drive mode, in the second parallel drive mode, since the brake 20 can limit the rotation of the sun gear 10, the power loss caused by the power output by the engine 9 being transmitted to the sun gear 10 through the planet carrier 7, the ring gear 5, and the planet gear 6 in sequence to drive the sun gear 10 to rotate can be avoided.

[0093] The control processes for switching between the respective drive modes are described below by way of example:

[0094] When the vehicle is initially in the pure electric two-wheel drive mode described below, the first clutch 4, the second clutch 3, and the brake 20 are all in the open state. After the driving instruction requests to switch to the power split drive mode, first control the motor 1 to perform a rapid synchronous speed control with no load. When the speed of the motor 1 is synchronized with the speed of the sun gear 10, control the second clutch 3 to engage with the gear shaft of the sun gear 10. The speed closed-loop control of the motor 1 quickly drags the engine 9 to the optimized speed range, and the engine 9 ignites and starts, thus realizing the switching of the transmission device to the power split drive mode.

[0095] When the transmission device is initially in the pure electric drive mode, the first clutch 4 is engaged with the ring gear 5, and the second clutch 3 and the brake 20 are both in the open state. After the driving instruction requests to switch to the power split drive mode, control the first clutch 4 to disengage from the ring gear 5, and control the motor 1 to perform a rapid synchronous speed control with no load. When the speed of the motor 1 is synchronized with the speed of the sun gear 10, control the second clutch 3 to engage with the gear shaft of the sun gear 10. The speed closed-loop control of the motor 1 quickly drags the engine 9 to the optimized speed range, and the engine 9 ignites and starts, thus realizing the switching of the transmission device from the pure electric drive mode to the power split drive mode.

[0096] When the vehicle is initially in the pure electric two-wheel drive mode described below, the first clutch 4, the second clutch 3, and the brake 20 are all in the open state. After the driving instruction requests to switch to the first parallel drive mode, control the motor 1 to perform a rapid synchronous speed control with no load. When the speed of the motor 1 is synchronized with the speed of the sun gear 10, control the second clutch 3 to engage with the gear shaft of the sun gear 10. The speed closed-loop control of the motor 1 quickly drags the engine 9 to synchronize its speed with the speed of the ring gear 5 (at this time, the speed of the ring gear 5 is also synchronized with the speed of the sun gear 10), control the first clutch 4 to engage with the ring gear 5, and the engine 9 ignites and starts, thus realizing the switching of the transmission device to the first parallel drive mode.

[0097] When the transmission device is initially in the second parallel drive mode, the brake 20 is engaged with the gear shaft of the sun gear 10, the first clutch 4 is engaged with the ring gear 5, and the second clutch 3 is in the open state. When the driving instruction requests to switch to the engine direct drive mode, only need to control the first clutch 4 to disengage from the ring gear 5, thus realizing the switching of the transmission device from the second parallel drive mode to the engine direct drive mode.

[0098] Similarly, the switching between other modes can be realized, which will not be elaborated here.

[0099] In the transmission device in the related art, the engine shaft 8 includes a brake 20, a clutch, a synchronizer, etc. upward, with a large lateral dimension and many control components, resulting in complex control. In this application, as can be seen from the above description, only by controlling a dual clutch and a brake 20 can the mode switching be achieved, with simple control, a compact structure, and a small lateral dimension. Moreover, when starting the engine 9 is required for mode switching, the control process is simple and fast.

[0100] According to another aspect of the present application, a driving device is provided. The driving device includes an engine 9, a motor 1, and a transmission device.

[0101] Among them, the transmission device can be implemented as the transmission device in the above text, and reference can be made to the introduction in the above text, which will not be elaborated here.

[0102] According to another aspect of the present application, a driving system is provided. The driving system includes a front driving device and a rear driving device, and at least one of the front driving device and the rear driving device is the transmission device in the above text.

[0103] For example, the front driving device can be implemented as the driving device in the above text, and the rear driving device can be an electric driving device 17. As Figure 7 shown, when the front driving device is not operating, the pure electric two-wheel drive mode operation can be achieved through the rear driving device. During the pure electric two-wheel drive mode operation, the electric driving device 17 drives the left rear wheel 15 and the right rear wheel 16 to travel. At this time, both the first clutch 4 and the second clutch 3 are in the open state, the engine 9 is stationary due to its own friction, and the ring gear 5 and the sun gear 10 are in an idling state.

[0104] Alternatively, the rear driving device can be implemented as the driving device in the above text, and the front driving device can be an electric driving device 17. When the rear driving device is not operating, the pure electric two-wheel drive mode operation can be achieved through the front driving device. The specific process can refer to the description in the above text, which will not be elaborated here.

[0105] Alternatively, both the front driving device and the rear driving device can be the driving device in the above text.

[0106] It should be noted that, no matter which method is used, the four-wheel drive driving in all modes can be achieved. Taking the front driving device being implemented as the driving device in the above text and the rear driving device being the electric driving device 17 as an example, the front driving device can achieve driving modes such as pure electric driving mode, engine direct drive mode, power split driving mode, first parallel driving mode, second parallel driving mode, etc. When the front driving device drives the front axle of the vehicle in any of the above modes, the rear driving device can simultaneously drive the rear axle of the vehicle, so that the four-wheel drive driving in all modes can be achieved. The power transmission process during the four-wheel drive driving can be referred to Figures 2 to 6The direction of the arrow. When the front drive device and the rear drive device are implemented in the remaining two ways, the full-mode four-wheel drive can be realized by analogy with the description in the above text, which will not be elaborated here.

[0107] According to another aspect of the present application, a vehicle is provided, and the vehicle includes a drive system.

[0108] Among them, the drive system can be implemented as the drive system in the above text, and reference can be made to the introduction in the above text, which will not be elaborated here.

[0109] In summary, for the transmission device, drive device, drive system and vehicle according to the embodiments of the present application, by directly connecting the planetary gear mechanism to the variable speed transmission mechanism, when both the engine and the motor are connected to the planetary gear mechanism, even when a part of the power output by the engine drives the motor to generate electricity, the other part of the power output by the engine can still drive the variable speed transmission mechanism through the planetary gear mechanism, and then drive the axle connected to the variable speed transmission mechanism to operate, avoiding the situation in the related art where the engine cannot drive the axle of the vehicle in the series drive mode, enabling the vehicle including the transmission device of the present application to achieve four-wheel drive and improving the driving ability of the vehicle.

[0110] Although example embodiments have been described herein with reference to the drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application thereto. Those of ordinary skill in the art can make various changes and modifications therein without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

[0111] Similarly, it should be understood that, in order to streamline the present application and assist in understanding one or more of the various aspects of the application, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be construed as reflecting the intention that the claimed present application requires more features than those expressly recited in each claim. Rather, as reflected by the corresponding claims, the point of the application lies in that the corresponding technical problems can be solved by features less than all the features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, where each claim itself serves as a separate embodiment of the present application.

[0112] In addition, those skilled in the art will appreciate that although some of the embodiments described herein include certain features included in other embodiments but not others, the combination of features of different embodiments is meant to be within the scope of this application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0113] It should be noted that the above embodiments are illustrative of the application and not restrictive thereof, and that alternative embodiments can be devised by those skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

Claims

1. A transmission device, characterized in that: The transmission device comprises: a planetary gear mechanism, a clutch and a speed change transmission mechanism; The planetary gear mechanism is used for transmission connection with the engine (9); The planetary gear mechanism is suitable for being transmission-connected or disconnected with the motor (1) through the clutch; The planetary gear mechanism is in transmission connection with the speed change transmission mechanism; Wherein, when the transmission device is in the first driving mode, the planetary gear mechanism is both in driving connection with the engine (9) and in driving connection with the motor (1) through the clutch. After the power output by the engine (9) is transmitted to the planetary gear mechanism, a part of the power drives the speed change transmission mechanism to operate through the planetary gear mechanism, and the other part of the power drives the motor (1) to generate electricity through the planetary gear mechanism and the clutch in sequence.

2. The transmission device according to claim 1, characterized in that: When the transmission device is in the second driving mode, the planetary gear mechanism is both in driving connection with the engine (9) and in driving connection with the motor (1) through the clutch. The power output by the engine (9) and the power output by the motor (1) are transmitted to the planetary gear mechanism together, so that the planetary gear mechanism drives the speed change transmission mechanism to operate.

3. The transmission device according to claim 2, characterized in that: The clutch is a double clutch, and the double clutch comprises a first clutch (4) and a second clutch (3); The first input end of the planetary gear mechanism is used for transmission connection with the engine (9), so that the power output by the engine (9) is transmitted to the planetary gear mechanism through the first input end; The second input end of the planetary gear mechanism is used to be connected or disconnected with the motor (1) through the first clutch (4), and / or the third input end of the planetary gear mechanism is used to be connected or disconnected with the motor (1) through the second clutch (3); The output end of the planetary gear mechanism is drivingly connected to the input end of the speed change transmission mechanism, and the output end of the speed change transmission mechanism is used to connect to the axle of the vehicle so that the planetary gear mechanism drives the axle to operate through the speed change transmission mechanism.

4. The transmission device according to claim 3, characterized in that: When the first input end of the planetary gear mechanism is in driving connection with the engine (9), The second input end of the planetary gear mechanism is disconnected from the motor (1) via the first clutch (4), and the third input end of the planetary gear mechanism is transmission-connected to the motor (1) via the second clutch (3), so that part of the power output by the engine (9) can sequentially pass through the planetary gear mechanism and the second clutch to drive the motor (1) to generate electricity.

5. The transmission device according to claim 3, characterized in that: When the first input end of the planetary gear mechanism is in driving connection with the engine (9), The second input end of the planetary gear mechanism is transmission-connected to the motor (1) via the first clutch (4), so that the power output by the motor (1) can be transmitted to the planetary gear mechanism, thereby enabling the planetary gear mechanism to drive the speed transmission mechanism to operate.

6. The transmission device according to claim 3, characterized in that: The planetary gear mechanism comprises: a planet carrier (7), a ring gear (5), a sun gear (10) and a planet gear (6); The planet carrier (7), the ring gear (5) and the sun gear (10) are coaxially arranged, and the sun gear (10) and the planet gear (6) are arranged inside the ring gear (5); The input end of the planet carrier (7) is drivingly connected to the engine (9), and the output end of the planet carrier (7) is connected to the gear shaft of the planetary gear (6); The planetary gear (6) is arranged around the sun gear (10), and the planetary gear (6) is meshed with the sun gear (10) and the internal teeth of the ring gear (5); The ring gear (5) is transmission-connected or disconnected with the motor (1) via the first clutch (4); The gear shaft of the sun gear (10) is transmission-connected or disconnected with the motor (1) via the second clutch (3).

7. The transmission device according to claim 6, characterized in that: The transmission device also includes: A brake (20) is connected or disconnected in driving connection with the gear shaft of the sun gear (10).

8. The transmission device according to claim 7, characterized in that: The first driving mode is a power split driving mode, and the second driving mode is a first parallel driving mode or a second parallel driving mode; The brake (20), the dual clutch and the planetary gear mechanism enable the transmission device to switch modes under multiple driving modes, and the driving modes include a pure electric driving mode, an engine direct driving mode, a power split driving mode, a first parallel driving mode and a second parallel driving mode.

9. The transmission device according to claim 8, characterized in that: In pure electric driving mode, The brake (20) is disconnected from the gear shaft of the sun gear (10); The ring gear (5) is transmission-connected to the motor (1) via the first clutch (4); The gear shaft of the sun gear (10) is disconnected from the motor (1) via the second clutch (3).

10. The transmission device according to claim 8, characterized in that: In direct engine drive mode, The brake (20) is drivingly connected to the gear shaft of the sun gear (10); The ring gear (5) is disconnected from the motor (1) via the first clutch (4); The gear shaft of the sun gear (10) is disconnected from the motor (1) via the second clutch (3).

11. The transmission device according to claim 8, characterized in that: In power split drive mode, The brake (20) is disconnected from the gear shaft of the sun gear (10); The ring gear (5) is disconnected from the motor (1) via the first clutch (4); The gear shaft of the sun gear (10) is transmission-connected to the motor (1) via the second clutch (3).

12. The transmission device according to claim 8, characterized in that: In the first parallel drive mode, The brake (20) is disconnected from the gear shaft of the sun gear (10); The ring gear (5) is transmission-connected to the motor (1) via the first clutch (4); The gear shaft of the sun gear (10) is transmission-connected to the motor (1) via the second clutch (3).

13. The transmission device according to claim 8, characterized in that: In the second parallel drive mode, The brake (20) is drivingly connected to the gear shaft of the sun gear (10); The ring gear (5) is transmission-connected to the motor (1) via the first clutch (4); The gear shaft of the sun gear (10) is disconnected from the motor (1) via the second clutch (3).

14. The transmission device according to claim 1, characterized in that: The speed change transmission mechanism comprises: A primary reduction driven gear (12) connected to the output end of the planetary gear mechanism; A main reduction driving gear (19) coaxial with the primary reduction driven gear (12); A main reduction driven gear (18) meshes with the main reduction driving gear (19), and a gear shaft of the main reduction driven gear (18) is transmission-connected to the axle; The differential (14) is arranged on the gear shaft of the main reduction driven gear (18).

15. A driving device, characterized in that: The driving device comprises an engine (9), an electric motor (1) and a transmission device as claimed in any one of claims 1 to 14.

16. A drive system, characterized in that: The drive system comprises a front drive device and a rear drive device, and at least one of the front drive device and the rear drive device is the drive device according to claim 15.

17. A vehicle, characterized in that: The vehicle includes the drive system of claim 16.

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