Single-motor hybrid power transmission device, transmission method and vehicle

Abstract

The present invention provides a single-motor hybrid power transmission device, a transmission method, and a vehicle. The single-motor hybrid power transmission device comprises an engine; a motor; a brake component; a clutch component; a first planetary gear set comprising a first sun gear, a first planetary carrier, a first planetary gear, and a first outer ring gear, the first sun gear being connected to the engine and the clutch component, the first planetary carrier being connected to the motor, and the first outer ring gear being connected to the brake component; and a second planetary gear set coaxially with the first planetary gear set, the second planetary gear set comprising a second sun gear, a second planetary carrier, a second planetary gear, and a second outer ring gear, the second planetary carrier being connected to the clutch component and the brake component, the second sun gear being rigidly connected to the first outer ring gear, and the second outer ring gear being rigidly connected to the first planetary carrier. The single-motor hybrid power transmission device, the transmission method, and the vehicle can solve the problems of existing hybrid power transmission structures, such as a single hybrid mode, a single gear position, and low space utilization.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a single-motor hybrid power transmission device, a transmission method, and a vehicle. Background Art

[0002] As people's awareness of energy conservation and emission reduction continues to increase, conventional power vehicles are difficult to meet people's needs due to structural limitations. As a new type of vehicle power, hybrid vehicles are in a booming development stage in terms of technology and market, among which hybrid vehicle drive devices occupy an extremely important position.

[0003] Current hybrid transmissions are limited by their simple structure. Speed ​​and load capacity are controlled by electric motors, placing high demands on motor technology and making costs difficult to manage. Hybrid transmissions also have a limited number of modes and gears, resulting in low overall fuel efficiency and high overall costs. The lack of energy recovery modes hinders energy reuse. Existing hybrid drive systems and hybrid vehicles typically utilize multiple stacked parallel shafts, each consisting of independent components, preventing significant improvements in configuration and space utilization. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a single-motor hybrid power transmission device, a transmission method and a vehicle to solve the problems of the existing hybrid power transmission structure with a single hybrid mode, a single gear and low space utilization.

[0005] According to a first aspect of the present invention, a single-motor hybrid power transmission device is provided, wherein the single-motor hybrid power transmission device includes: an engine; a motor; a brake component; a clutch component connected to an output shaft for driving wheels; a first planetary row including a first sun gear, a first planetary carrier, a first planetary gear and a first outer ring gear, the first sun gear being connected to the engine, the first sun gear being connected to the clutch component, the first planetary carrier being connected to the motor, and the first outer ring gear being connected to the brake component; and a second planetary row being coaxially arranged with the first planetary row, the second planetary row including a second sun gear, a second planetary carrier, a second planetary gear and a second outer ring gear, the second planetary carrier being connected to the clutch component, the second planetary carrier being connected to the brake component, the second sun gear being rigidly connected to the first outer ring gear, and the second outer ring gear being rigidly connected to the first planetary carrier.

[0006] Preferably, the braking component includes a first brake and a second brake which are independently provided with each other, the first brake is connected to the first outer ring gear, and the second brake is connected to the second planet carrier.

[0007] Preferably, the clutch component includes a first clutch and a second clutch, the first clutch and the second clutch are arranged in parallel, the first clutch is connected to the first sun gear, and the second clutch is connected to the second planet carrier.

[0008] Preferably, the single-motor hybrid transmission device also includes: a first intermediate shaft connected to the first sun gear; a second intermediate shaft connected to the second planetary carrier, the second intermediate shaft connected to the second brake and the second clutch; a third intermediate shaft connected to the first clutch, the third intermediate shaft connected to the first intermediate shaft, the first planetary row is arranged between the first intermediate shaft and the third intermediate shaft, the first sun gear is connected to the third intermediate shaft; and an input shaft, the input end of which is connected to the engine through a coupler, and the output end of the input shaft is connected to the first intermediate shaft through a one-way clutch.

[0009] According to a second aspect of the present invention, a transmission method for a single-motor hybrid power transmission device is provided, wherein the single-motor hybrid power transmission device is the single-motor hybrid power transmission device as described above, and the transmission method for the single-motor hybrid power transmission device includes: realizing transmission of multiple gears by combining the first clutch and the second clutch or combining one of the first clutch and the second clutch with one of the first brake and the second brake.

[0010] Preferably, the plurality of gears include a first gear in which the second clutch and the first brake are combined, a second gear in which the first clutch and the second clutch are combined, a third gear in which the first clutch and the first brake are combined, and a fourth gear in which the first clutch and the second brake are combined.

[0011] Preferably, when the single-motor hybrid power transmission device is in the first gear, the power of the motor is transmitted to the second outer ring gear through the first planetary carrier, the first brake limits the movement of the second sun gear, the second outer ring gear drives the second planetary gear to rotate and drives the second planetary carrier to rotate, so that the power is transmitted to the second clutch through the second intermediate shaft and finally transmitted to the output shaft to drive the wheels to rotate.

[0012] Preferably, when the single-motor hybrid power transmission device is in the second gear, the power of the motor is diverted through the first planetary carrier, part of the power is transmitted to the first clutch through the first planetary gear, and the other part of the power is transmitted to the second clutch through the second planetary gear. The part of the power and the other part of the power are finally transmitted to the output shaft to drive the wheels to rotate.

[0013] Preferably, when the single-motor hybrid power transmission device is in the third gear, the power of the motor is transmitted to the first planetary carrier, the first brake limits the movement of the first outer ring gear, the first planetary carrier drives the first planetary gear to rotate and drives the first sun gear to rotate, so that the power is transmitted to the first clutch through the third intermediate shaft, and finally transmitted to the output shaft to drive the wheels to rotate.

[0014] Preferably, when the single-motor hybrid transmission device is in the fourth gear, the second brake limits the movement of the second intermediate shaft and the second planetary carrier, the power of the motor is transmitted to the second outer ring gear through the first planetary carrier, the second outer ring gear drives the second planetary gear to rotate and drives the second sun gear to rotate, the first outer ring gear is rigidly connected to the second sun gear, the power of the motor drives the first planetary carrier to rotate, the first planetary carrier drives the first planetary gear to rotate and drives the first sun gear to rotate, so that the power is transmitted to the first clutch through the third intermediate shaft, and finally transmitted to the output shaft to drive the wheels to rotate.

[0015] Preferably, the transmission method of the single-motor hybrid power transmission device includes: starting the engine when the single-motor hybrid power transmission device is in the first gear, the second gear, the third gear or the fourth gear, so that the single-motor hybrid power transmission device is in parallel mode, and the power of the engine passes through the coupler, the input shaft, the one-way clutch and the first intermediate shaft, and is finally transmitted to the first sun gear and / or the third intermediate shaft.

[0016] Preferably, the transmission method of the single-motor hybrid power transmission device includes: when the single-motor hybrid power transmission device is in the first gear, the second gear, the third gear, the fourth gear or the parallel mode, the driver of the vehicle steps on the brake pedal to enable the single-motor hybrid power transmission device to start the energy recovery mode, the motor changes from the driving mode to the power generation mode, the power source of the motor is cut off and excitation is applied, and the kinetic energy of the vehicle is converted into electrical energy through the motor and flows to the power battery.

[0017] Preferably, the transmission method of the single-motor hybrid transmission device includes: when the vehicle is in a parked or parked state, engaging the first brake to put the single-motor hybrid transmission device into a parking power generation mode, the motor is excited, and the power of the engine is transmitted to the first sun gear through the coupler, the input shaft and the first intermediate shaft. The first brake limits the movement of the first outer ring gear, the first sun gear drives the first planetary gear to rotate and drives the first planetary carrier to rotate, and finally drives the motor to rotate to achieve parking power generation.

[0018] According to a third aspect of the present invention, there is provided a vehicle, wherein the vehicle includes the single-motor hybrid power transmission device as described above.

[0019] The single-motor hybrid transmission device, transmission method and vehicle of the embodiments of the present invention have only one motor and one engine, and are transmitted through two planetary gears, so as to realize multiple gears and multiple mode operating conditions. By rigidly connecting the first outer ring gear of the first planetary gear with the second sun gear of the second planetary gear, and rigidly connecting the second outer ring gear of the second planetary gear with the first planetary carrier of the first planetary gear, a transmission relationship between the first planetary gear and the second planetary gear is established to realize transmission forms with multiple transmission ratios. The first planetary gear and the second planetary gear are arranged in a coaxial manner, which can provide space and configuration utilization, thereby effectively solving the problems of the existing hybrid power transmission structure with a single hybrid mode, a single gear and low space utilization.

[0020] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 2 is a schematic structural diagram of a single-motor hybrid power transmission device according to the present invention.

[0023] Figure 2 Schematic diagram of the power transmission path of the single-motor hybrid power transmission device in the first gear according to the present invention.

[0024] Figure 3 Schematic diagram of the power transmission path of the single-motor hybrid power transmission device in the second gear according to the present invention.

[0025] Figure 4 Schematic diagram of the power transmission path of the single-motor hybrid power transmission device in the third gear according to the present invention.

[0026] Figure 5 Schematic diagram of the power transmission path of the single-motor hybrid power transmission device in the fourth gear according to the present invention.

[0027] Figure 6 2 is a schematic diagram of the power transmission path of the single-motor hybrid power transmission device according to the present invention in the parallel mode of the first gear.

[0028] Figure 7 2 is a schematic diagram of the power transmission path of the single-motor hybrid power transmission device according to the present invention in the parallel mode in the second gear.

[0029] Figure 8 2 is a schematic diagram of the power transmission path of the single-motor hybrid power transmission device according to the present invention in the parallel mode in the third gear.

[0030] Figure 9 2 is a schematic diagram of the power transmission path of the single-motor hybrid power transmission device according to the present invention in the parallel mode in the fourth gear.

[0031] Figure 10 Schematic diagram of the power transmission path of the single-motor hybrid power transmission device according to the present invention in the parking power generation mode.

[0032] Figure 11 4 is a gear diagram of a single-motor hybrid power transmission device according to the present invention.

[0033] Figure markings: 1-first planetary row; 11-first sun gear; 12-first planetary carrier; 13-first planetary gear; 14-first outer ring gear; 2-second planetary row; 21-second sun gear; 22-second planetary carrier; 23-second planetary gear; 24-second outer ring gear; 31-first brake; 32-second brake; 41-first clutch; 42-second clutch; 5-engine; 6-motor; 71-first intermediate shaft; 72-second intermediate shaft; 73-third intermediate shaft; 8-input shaft; 81-coupler; 82-one-way clutch; 9-output shaft. DETAILED DESCRIPTION

[0034] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0035] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0036] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0037] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0038] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0039] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0040] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0041] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0042] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0043] like Figure 1 As shown, according to a first aspect of the present invention, a single-motor hybrid transmission device is provided, which includes an engine 5, a motor 6, a brake component, a clutch component, a first planetary gear 1 and a second planetary gear 2.

[0044] In the following description, reference will be made to Figure 1 , specifically describing the specific structure of the above components of the single-motor hybrid power transmission device and the connection relationship of the above components.

[0045] like Figure 1As shown, in an embodiment, the single-motor hybrid transmission device may include only one engine 5 and only one motor 6, thereby enabling multi-mode, multi-gear drive. Specifically, the first planetary gear set 1 may include a first sun gear 11, a first planetary carrier 12, first planetary gears 13, and a first outer ring gear 14. The first sun gear 11 may be connected to the engine 5, which provides power to drive the first sun gear 11. The first sun gear 11 may also be connected to a clutch component, which may be connected to an output shaft 9. The output shaft 9 is used to drive the vehicle's wheels. The first planetary carrier 12 may be connected to the motor 6 (e.g., via a coupling), which provides power to drive the first planetary carrier 12. The first outer ring gear 14 may be connected to a brake component that limits the movement of connected (e.g., bolted) components. The second planetary gear set 2 may include a second sun gear 21, a second planetary carrier 22, second planetary gears 23, and a second outer ring gear 24. The second planetary carrier 22 may be connected to both a clutch component and a brake component. The second sun gear 21 can be rigidly connected to the first outer ring gear 14 (i.e., forming a rigid unit or connected to it by a fixed connection, such as welding), so that the rotational speed of the second sun gear 21 and the first outer ring gear 14 are consistent. The second outer ring gear 24 can be rigidly connected to the first planetary carrier 12 (e.g., by welding), so that the rotational speed of the second outer ring gear 24 and the first planetary carrier 12 are consistent. This arrangement can establish a transmission relationship between the various components of the first planetary gear set 1 and the various components of the second planetary gear set 2, thereby realizing transmission forms with multiple transmission ratios. In addition, providing only two planetary gear sets (i.e., the first planetary gear set 1 and the second planetary gear set 2), and arranging the first planetary gear set 1 and the second planetary gear set 2 coaxially, can greatly improve the space utilization of the single-motor hybrid transmission device and avoid the stacking of multiple parallel shafts. It should be noted that the operation of a planetary gear set requires locking one of its components or maintaining a constant rotational speed. The purpose of providing a braking component is to limit the movement of the components in the planetary gear set to ensure the normal operation of the entire planetary gear set. Further explanation: It is not necessary to ensure that one component of the first planetary gear set 1 or the second planetary gear set 2 is locked. As long as the rotational speed of one component of the first planetary gear set 1 or the second planetary gear set 2 is fixed, the transmission principle of the planetary gear set can be achieved by utilizing the relative rotational motion of the remaining components relative to the component with a fixed rotational speed.

[0046] Preferably, Figure 1As shown, in this embodiment, the braking component may include a first brake 31 and a second brake 32. The first brake 31 may be connected to the first outer ring gear 14, and the second brake 32 may be connected to the second planetary carrier 22. The first brake 31 and the second brake 32 are independent of each other (i.e., the first brake 31 and the second brake 32 are independently provided), allowing the single-motor hybrid power transmission device to selectively engage the first brake 31 and the second brake 32 to control the power transmission path.

[0047] Preferably, Figure 1 As shown, in this embodiment, the clutch component may include a first clutch 41 and a second clutch 42. The first clutch 41 may be connected to the first sun gear 11, and the second clutch 42 may be connected to the second planetary carrier 22. Furthermore, both the first clutch 41 and the second clutch 42 may be connected to the output shaft 9 (i.e., the first clutch 41 and the second clutch 42 are arranged in parallel). The single-motor hybrid power transmission device can selectively engage the first clutch 41 and the second clutch 42 to control the power transmission path.

[0048] Further, preferably, Figure 1 As shown, in the embodiment, the single-motor hybrid power transmission device may further include an input shaft 8, a first intermediate shaft 71, a second intermediate shaft 72, and a third intermediate shaft 73. The input end of the input shaft 8 may be connected to the power system of the engine 5 via a coupler 81 (e.g., a key connection or a coupling connection). The output end of the input shaft 8 may be connected to the first intermediate shaft 71 and the third intermediate shaft 73 in sequence via a one-way clutch 82 (e.g., Figure 1 The input shaft 8, the first intermediate shaft 71 and the third intermediate shaft 73 are shown connected in sequence).

[0049] The first planetary gear set 1 can be arranged between the first intermediate shaft 71 and the third intermediate shaft 73. The first sun gear 11 of the first planetary gear set 1 can be connected to both the first intermediate shaft 71 and the third intermediate shaft 73. Further explanation is provided below: In this embodiment, the first intermediate shaft 71 and the third intermediate shaft 73 can be integrally formed, and the first sun gear 11 of the first planetary gear set 1 can be keyed to the integral first and third intermediate shafts 71, 73. The first sun gear 11 is connected to the engine 5 via the first intermediate shaft 71. The output end of the third intermediate shaft 73 can be connected to the first clutch 41, meaning the first sun gear 11 is connected to the first clutch 41 via the third intermediate shaft 73. The second intermediate shaft 72 can be connected to the second brake 32 and the second clutch 42, meaning the second planetary carrier 22 is connected to the second brake 32 and the second clutch 42 via the second intermediate shaft 72. This arrangement enables the single-motor hybrid powertrain to selectively engage brake and clutch components to control the power transmission path, achieving various gear ratios and, consequently, multi-mode, multi-speed drive.

[0050] It should be further explained that the shafts and gears may be connected by keys, the shafts and clutch components may be connected by keys or couplings, and the brake components may be connected to other components by bolts. This improves the stability of the connection and, in turn, the stability and accuracy of power transmission.

[0051] In addition, if Figures 2 to 11 As shown, according to a second aspect of the present invention, a transmission method of a single-motor hybrid power transmission device is provided. The single-motor hybrid power transmission device may be the single-motor hybrid power transmission device described above.

[0052] Preferably, Figure 2 As shown, in an embodiment, the transmission method of the single-motor hybrid powertrain includes engaging the second clutch 42 and the first brake 31, placing the single-motor hybrid powertrain in first gear (EV1). In this position, the power of the motor 6 is transmitted to the first planetary carrier 12. Because the first planetary carrier 12 is rigidly connected to the second outer ring gear 24, the first planetary carrier 12 and the second outer ring gear 24 have the same rotational speed. Furthermore, because the first brake 31 is engaged, it restricts the rotation of the second sun gear 21, causing the speed of the second sun gear 21 to be zero. This allows the second outer ring gear 24 to drive the second planetary gears 23 to revolve, thereby driving the second planetary carrier 22 to rotate (i.e., rotate). The power of the motor 6 is transmitted to the second clutch 42 via the second intermediate shaft 72, and ultimately to the output shaft 9, driving the wheels of the vehicle.

[0053] Preferably, Figure 3As shown, in this embodiment, the transmission method of the single-motor hybrid transmission device further includes engaging the first clutch 41 and the second clutch 42 to place the single-motor hybrid transmission device in the second gear position (EV2). In this position, the power of the motor 6 is transmitted to the first planetary carrier 12. Because the first planetary carrier 12 is rigidly connected to the second outer ring gear 24, the first planetary carrier 12 and the second outer ring gear 24 rotate at the same speed. Furthermore, because the second sun gear 21 is rigidly connected to the first outer ring gear 14, the second sun gear 21 and the first outer ring gear 14 rotate at the same speed, thereby enabling the first and second planetary gears 1 and 2 to operate simultaneously. The power of the motor 6 is split into two parts by the first planetary gear 1. One part of the power is transmitted through the first sun gear 11 of the first planetary gear 1 to the third intermediate shaft 73, and then through the third intermediate shaft 73 to the first clutch 41, and finally to the output shaft 9. The other part of the power is transmitted through the second planetary carrier 22 of the second planetary gear 2 to the second intermediate shaft 72, and then through the second intermediate shaft 72 to the second clutch 42, and finally to the output shaft 9, thereby driving the wheels of the vehicle. Since the first clutch 41 and the second clutch 42 are both engaged, the first planetary gear 1 and the second planetary gear 2 constrain each other, thereby making the speed of the output shaft 9 (ie, output speed) the same as the speed of the first planetary carrier 12 (ie, input speed).

[0054] Preferably, Figure 4 As shown, in an embodiment, the transmission method of the single-motor hybrid power transmission device further includes engaging the first clutch 41 and the first brake 31, placing the single-motor hybrid power transmission device in third gear (EV3). In this position, the power of the motor 6 is transmitted to the first planetary carrier 12. Since the first brake 31 is engaged, the first brake 31 restricts the rotation of the first outer ring gear 14, resulting in a rotation speed of the first outer ring gear 14 of 0. This allows the first planetary carrier 12 to drive the first planetary gears 13 to revolve, thereby driving the first sun gear 11 to rotate (i.e., rotate). The power of the motor 6 is transmitted to the first clutch 41 via the third intermediate shaft 73, and ultimately to the output shaft 9, thereby driving the wheels of the vehicle.

[0055] Preferably, Figure 5As shown, in an embodiment, the transmission method of the single-motor hybrid transmission device further includes engaging the first clutch 41 and the second brake 32 to place the single-motor hybrid transmission device in fourth gear (EV4). In this position, the power of the motor 6 is transmitted to the first planetary carrier 12. Because the first planetary carrier 12 is rigidly connected to the second outer ring gear 24, the first planetary carrier 12 and the second outer ring gear 24 rotate at the same speed. The power of the motor 6 is transmitted to the second outer ring gear 24 via the first planetary carrier 12. Furthermore, because the second brake 32 is engaged, it restricts the rotation of the second intermediate shaft 72 and the second planetary carrier 22, resulting in a speed of zero for the second planetary carrier 22. This allows the second outer ring gear 24 to drive the second planetary gears 23 to rotate (i.e., self-rotate), thereby driving the second sun gear 21 to rotate (i.e., self-rotate). Furthermore, because the second sun gear 21 is rigidly connected to the first outer ring gear 14, the first outer ring gear 14 and the second sun gear 21 rotate at the same speed. Furthermore, when the speed of the first outer ring gear 14 is constant, the first planetary carrier 12 can drive the first planetary gears 13 to rotate, thereby driving the first sun gear 11. The power of the motor 6 is transmitted via the third intermediate shaft 73 to the first clutch 41 and ultimately to the output shaft 9 to drive the wheels of the vehicle.

[0056] More preferably, Figures 6 to 9 As shown, in an embodiment, the transmission method of the single-motor hybrid power transmission device further includes starting the engine 5 when the single-motor hybrid power transmission device is in the first, second, third, or fourth gear, placing the single-motor hybrid power transmission device in parallel mode, enabling both the motor 6 and the engine 5 to provide power. Specifically, when the vehicle is in the first, second, third, or fourth gear, the engine 5 can be engaged to increase vehicle power based on power requirements. After the engine 5 is started, the power of the engine 5 passes through the coupler 81, the input shaft 8, the one-way clutch 82, and the first intermediate shaft 71, ultimately being transmitted to the first sun gear 11 and / or the third intermediate shaft 73. In this case, the power of the engine 5 is engaged in the single-motor hybrid power transmission device, allowing the engine 5 and the motor 6 to jointly drive the vehicle's wheels. The provision of the one-way clutch 82 prevents the power of the motor 6 from being transferred to the engine 5, thereby reducing power loss and extending the life of the engine 5.

[0057] Specifically, such as Figure 6 As shown, in the embodiment, when the single-motor hybrid transmission device is in the parallel mode of the first gear, the second clutch 42 is engaged, and the power of the engine 5 is transmitted from the first intermediate shaft 71 to the first sun gear 11, as shown in FIG. Figure 6As shown, the first brake 31 restricts the rotation of the first outer ring gear 14 and the second sun gear 21, so the power of the engine 5 is transmitted to the first planetary carrier 12 through the first sun gear 11 and the power of the motor 6, and then transmitted to the output shaft 9 through the second clutch 42. In addition, since the power transmission from the first sun gear 11 to the first planetary carrier 12 is the same as that of the first sun gear 11, the power transmission is the same as that of the first sun gear 11. Figure 2 The situation is similar, so I won't go into details here, but one thing that needs to be explained is that Figure 6 and Figure 2 In addition to the introduction of the engine 5, the first brake 31 is also connected to the first outer ring gear 14. Figure 2 In the embodiment of FIG. 1 , although not shown, the first brake 31 is also connected to the first outer gear ring 14. Figure 2 In the embodiment, the first planetary gear 1 does not participate in the transmission of power, so Figure 2 Not shown in the figure, the first brake 31 is also connected to the first outer ring gear 14 .

[0058] like Figure 7 As shown in the embodiment, when the single-motor hybrid transmission device is in the parallel mode of the second gear, the first clutch 41 and the second clutch 42 are engaged. The power of the engine 5 is transmitted from the first intermediate shaft 71 to the third intermediate shaft 73. The power transmission process of the motor 6 is the same as Figure 3 Finally, the power of the engine 5 and a portion of the power of the motor 6 are transmitted to the output shaft 9 via the first clutch, and the other portion of the power of the motor 6 is transmitted to the output shaft 9 via the second clutch 42.

[0059] like Figure 8 As shown in the embodiment, when the single-motor hybrid transmission device is in the parallel mode of the third gear, the first clutch 41 is engaged, and the power of the engine 5 is transmitted from the first intermediate shaft 71 to the third intermediate shaft 73. The power transmission process of the motor 6 is the same as Figure 4 Finally, the power of the engine 5 and the power of the motor 6 are transmitted to the output shaft 9 via the first clutch 41.

[0060] like Figure 9 As shown in the embodiment, when the single-motor hybrid power transmission device is in the parallel mode of the fourth gear, the first clutch 41 is engaged, and the power of the engine 5 is transmitted from the first intermediate shaft 71 to the third intermediate shaft 73. The power transmission process of the motor 6 is the same as Figure 5 Finally, the power of the engine 5 and the power of the motor 6 are transmitted to the output shaft 9 via the first clutch 41.

[0061] Furthermore, in an embodiment, the transmission method of the single-motor hybrid transmission device further includes, when the single-motor hybrid transmission device is in the first gear, the second gear, the third gear, the fourth gear, or the parallel mode, the driver of the vehicle depresses the brake pedal, thereby activating an energy recovery mode for the single-motor hybrid transmission device. In the first gear, the second gear, the third gear, the fourth gear, and the parallel mode, energy flows from the power battery, where electrical energy is converted into kinetic energy by the motor, ultimately driving the vehicle. In the energy recovery mode, upon detecting the driver's braking intention, the vehicle cuts off the power source of the motor 6 and simultaneously controls the motor 6 via a controller to excite the motor 6, thereby switching the motor 6 from a driving mode to a generating mode, i.e., converting the motor 6 into a generator to generate electricity (during the generation process, the motor 6 can be considered a load or a resistance device to brake the vehicle). This allows the vehicle's kinetic energy to be converted into electrical energy that flows to the power battery, thereby achieving energy recovery and preventing energy waste after braking. During this process, the engagement states of the clutch component and the brake component of the single-motor hybrid power transmission device do not change, that is, the engagement states are the same as those of the driving mode immediately before braking.

[0062] Preferably, Figure 10 As shown, in an embodiment, the transmission method of the single-motor hybrid power transmission device further includes engaging the first brake 31 when the vehicle is stopped or parked, placing the single-motor hybrid power transmission device in a parking power generation mode. In this state, the motor 6 is in power generation mode (i.e., excitation is applied to the motor 6). The power of the engine 5 is transmitted sequentially through the coupler 81, the input shaft 8, the one-way clutch 82, and the first intermediate shaft 71, ultimately to the first sun gear 11. Since the first brake 31 is engaged, it restricts the rotation of the first outer ring gear 14, resulting in a rotation speed of zero. This allows the first sun gear 11 to drive the first planetary gears 13 to revolve, thereby driving the first planetary carrier 12 to rotate. Ultimately, the first planetary carrier 12 drives the motor 6 to rotate, achieving parking power generation.

[0063] like Figure 11As shown, in this embodiment, the transmission method of the single-motor hybrid transmission device enables four-speed transmission of the generator 6 and the joint power supply of the motor 6 and the engine 5, namely, first gear (EV1), second gear (EV2), third gear (EV3), and fourth gear (EV4), as well as a parallel mode. The wheel speeds increase in the first, second, third, and fourth gears, respectively. The transmission method of the single-motor hybrid transmission device also enables power generation during vehicle parking (i.e., parking power generation mode) and brake energy recovery (i.e., energy recovery mode). This allows the single-motor hybrid transmission device to achieve multiple hybrid modes and multiple power output gears to meet actual operating conditions and actual needs, thereby reducing energy consumption.

[0064] Furthermore, according to a third aspect of the present invention, there is provided a vehicle comprising the single-motor hybrid power transmission device as described above.

[0065] During use, the vehicle establishes a transmission relationship between the first and second planetary gears 1 and 2 by rigidly connecting the first outer ring gear 14 of the first planetary gear set 1 to the second sun gear 21 of the second planetary gear set 2, and by rigidly connecting the second outer ring gear 24 of the second planetary gear set 2 to the first planetary carrier 12 of the first planetary gear set 1, thereby achieving a transmission configuration with multiple transmission ratios. The coaxial arrangement of the first and second planetary gear sets 1 and 2 improves the space utilization of the single-motor hybrid power transmission device. The vehicle can control the power transmission path within the single-motor hybrid power transmission device by selecting the combination of the first brake 31, the second brake 32, the first clutch 41, and the second clutch 42, thereby achieving multi-mode, multi-gear drive, as well as realizing energy recovery while driving and power generation when parked.

[0066] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A single-motor hybrid power transmission device, installed in a vehicle, characterized in that: The single-motor hybrid power transmission device includes: engine; Motor; brake components; a clutch component connected to an output shaft for driving wheels; a first planetary gear, comprising a first sun gear, a first planet carrier, a first planet gear, and a first outer ring gear, wherein the first sun gear is connected to the engine, the first sun gear is connected to the clutch component, the first planet carrier is connected to the motor, and the first outer ring gear is connected to the brake component; and a second planetary gear, coaxially arranged with the first planetary gear, comprising a second sun gear, a second planetary carrier, a second planetary gear, and a second outer ring gear, wherein the second planetary carrier is connected to the clutch component, the second planetary carrier is connected to the brake component, the second sun gear is rigidly connected to the first outer ring gear, and the second outer ring gear is rigidly connected to the first planetary carrier; The braking component includes a first brake and a second brake that are independently provided with each other, the first brake is connected to the first outer ring gear, and the second brake is connected to the second planet carrier; The clutch component includes a first clutch and a second clutch, the first clutch and the second clutch are arranged in parallel, the first clutch is connected to the first sun gear, and the second clutch is connected to the second planet carrier; The single-motor hybrid power transmission device further includes: a first intermediate shaft connected to the first sun gear; a second intermediate shaft connected to the second planet carrier, the second intermediate shaft being connected to the second brake and the second clutch; a third intermediate shaft connected to the first clutch, the third intermediate shaft connected to the first intermediate shaft, the first planetary gear set disposed between the first intermediate shaft and the third intermediate shaft, and the first sun gear connected to the third intermediate shaft; and An input shaft, an input end of which is connected to the engine via a coupler, and an output end of which is connected to the first intermediate shaft via a one-way clutch.

2. A transmission method for a single-motor hybrid power transmission device, characterized in that: The single-motor hybrid power transmission device is the single-motor hybrid power transmission device according to claim 1, and the transmission method of the single-motor hybrid power transmission device includes: realizing transmission of multiple gears by combining the first clutch and the second clutch or combining one of the first clutch and the second clutch with one of the first brake and the second brake.

3. The transmission method of the single-motor hybrid power transmission device according to claim 2, characterized in that: The plurality of gears include a first gear in which the second clutch and the first brake are combined, a second gear in which the first clutch and the second clutch are combined, a third gear in which the first clutch and the first brake are combined, and a fourth gear in which the first clutch and the second brake are combined.

4. The transmission method of the single-motor hybrid power transmission device according to claim 3, characterized in that: When the single-motor hybrid transmission device is in the first gear, the power of the motor is transmitted to the second outer ring gear through the first planetary carrier, the first brake limits the movement of the second sun gear, the second outer ring gear drives the second planetary gear to rotate and drives the second planetary carrier to rotate, so that the power is transmitted to the second clutch through the second intermediate shaft and finally transmitted to the output shaft to drive the wheels to rotate.

5. The transmission method of the single-motor hybrid power transmission device according to claim 3, characterized in that: When the single-motor hybrid transmission device is in the second gear, the power of the motor is diverted through the first planetary carrier, part of the power is transmitted to the first clutch through the first planetary gear, and the other part of the power is transmitted to the second clutch through the second planetary gear. The part of the power and the other part of the power are finally transmitted to the output shaft to drive the wheels to rotate.

6. The transmission method of the single-motor hybrid power transmission device according to claim 3, characterized in that: When the single-motor hybrid transmission device is in the third gear, the power of the motor is transmitted to the first planetary carrier, the first brake limits the movement of the first outer ring gear, the first planetary carrier drives the first planetary gear to rotate and drives the first sun gear to rotate, so that the power is transmitted to the first clutch through the third intermediate shaft, and finally transmitted to the output shaft to drive the wheels to rotate.

7. The transmission method of the single-motor hybrid power transmission device according to claim 3, characterized in that: When the single-motor hybrid transmission device is in the fourth gear, the second brake limits the movement of the second intermediate shaft and the second planetary carrier, and the power of the motor is transmitted to the second outer ring gear through the first planetary carrier. The second outer ring gear drives the second planetary gear to rotate and drives the second sun gear to rotate. The first outer ring gear is rigidly connected to the second sun gear. The power of the motor drives the first planetary carrier to rotate, and the first planetary carrier drives the first planetary gear to rotate and drives the first sun gear to rotate, so that the power is transmitted to the first clutch through the third intermediate shaft and finally transmitted to the output shaft to drive the wheels to rotate.

8. The transmission method of the single-motor hybrid power transmission device according to any one of claims 3 to 7, characterized in that: The transmission method of the single-motor hybrid power transmission device includes: The engine is started when the single-motor hybrid transmission device is in the first gear, the second gear, the third gear or the fourth gear, so that the single-motor hybrid transmission device is in parallel mode, and the power of the engine is finally transmitted to the first sun gear and / or the third intermediate shaft through the coupler, the input shaft, the one-way clutch and the first intermediate shaft.

9. The transmission method of the single-motor hybrid power transmission device according to claim 8, characterized in that: The transmission method of the single-motor hybrid power transmission device includes: When the single-motor hybrid power transmission device is in the first gear, the second gear, the third gear, the fourth gear or the parallel mode, the driver of the vehicle steps on the brake pedal to activate the energy recovery mode of the single-motor hybrid power transmission device. The motor changes from the driving mode to the power generation mode, the power source of the motor is cut off and excitation is applied, and the kinetic energy of the vehicle is converted into electrical energy through the motor and flows into the power battery.

10. The transmission method of the single-motor hybrid power transmission device according to any one of claims 3 to 7, characterized in that: The transmission method of the single-motor hybrid power transmission device further includes: When the vehicle is parked or in a stopped or parked state, the first brake is engaged to put the single-motor hybrid power transmission device into a parking power generation mode, the motor is excited, and the power of the engine is transmitted to the first sun gear through the coupler, the input shaft and the first intermediate shaft. The first brake limits the movement of the first outer ring gear, and the first sun gear drives the first planetary gear to rotate and drives the first planetary carrier to rotate, and finally drives the motor to rotate to achieve parking power generation.

11. A vehicle, characterized in that: The vehicle includes the single-motor hybrid power transmission device of claim 1 .

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