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

Abstract

The application provides a single-motor hybrid power transmission device, a transmission method and a vehicle. The structure of the single-motor hybrid power transmission device comprises an engine, a motor, a brake component, a clutch component, a first planetary gear set, a first sun gear, a first carrier, a first planetary gear and a first outer gear ring, the first sun gear is connected with the engine, the clutch component and the brake component, the first carrier is connected with the clutch component, and a second planetary gear set is coaxially arranged with the first planetary gear set, the second planetary gear set comprises a second sun gear, a second carrier, a second planetary gear and a second outer gear ring, the second carrier is rigidly connected with the first outer gear ring, the second carrier is connected with the motor, the second outer gear ring is rigidly connected with the first carrier, and the second sun gear is connected with the brake component. The single-motor hybrid power transmission device, the transmission method and the vehicle can solve the problems of single hybrid mode, single gear and low space utilization of the existing hybrid power transmission structure.

Description

TECHNICAL FIELD

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

[0002] It is in a vigorous development stage, in which hybrid power vehicle driving devices occupy an extremely important position.

[0003] The current hybrid power transmission is limited by structure, has a single structure, and relies on the motor for speed and load capacity adjustment, which requires a higher level of motor and is difficult to control the cost; the hybrid mode is single, the gear is single, the comprehensive fuel saving rate is low, and the comprehensive cost is high. The energy recovery mode is lacking, which is not conducive to energy recycling. The existing hybrid power driving system and hybrid electric vehicle usually adopt a multi-parallel shaft stacking arrangement, and each part is an independent device, which cannot be greatly improved in configuration and space utilization. SUMMARY

[0004] Therefore, 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 single hybrid mode, single gear and low space utilization of the existing hybrid power transmission structure.

[0005] According to a first aspect of the present application, a single-motor hybrid power transmission device is provided, wherein the single-motor hybrid power transmission device comprises: an engine; a motor; a brake component; a clutch component connected to an output shaft for driving a wheel; a first planetary gear set comprising a first sun gear, a first carrier, a first planet gear and a first ring gear, the first sun gear being connected to the engine, the first sun gear being connected to the clutch component, the first sun gear being connected to the brake component, the first carrier being connected to the clutch component; and a second planetary gear set coaxially arranged with the first planetary gear set, the second planetary gear set comprising a second sun gear, a second carrier, a second planet gear and a second ring gear, the second carrier being rigidly connected to the first ring gear, the second carrier being connected to the motor, the second ring gear being rigidly connected to the first carrier, the second sun gear being connected to the brake component.

[0006] Preferably, the brake component comprises a first brake and a second brake arranged independently of each other, the first brake being connected to the second sun gear, and the second brake being connected to the first sun gear.

[0007] Preferably, the clutch component comprises a first clutch and a second clutch arranged in parallel with each other, the first clutch being connected to the first sun gear, and the second clutch being connected to the first carrier.

[0008] Preferably, the single-motor hybrid power transmission device further comprises: a first intermediate shaft, a first end of the first intermediate shaft being connected with the first clutch, a second end of the first intermediate shaft being connected with the second brake, the first planetary gear set being arranged between the first clutch and the second brake, the first sun gear being connected with the first intermediate shaft; a second intermediate shaft, two ends of the second intermediate shaft being connected with the first brake and the second sun gear respectively; an input shaft, an input end of the input shaft being connected with the engine through a coupling, an output end of the input shaft being connected with the second end of the first intermediate shaft through a one-way clutch.

[0009] According to the second aspect of the present application, a transmission method of a single-motor hybrid power transmission device is provided, wherein the transmission method of the single-motor hybrid power transmission device comprises: realizing the 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 multiple gears comprise a first gear in which the second clutch and the second brake are combined, a second gear in which the first clutch and the second clutch are combined, a third gear in which the second clutch and the first brake are combined, and a fourth gear in which the first clutch and the first 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 first outer ring gear through the second carrier, the second brake limits the movement of the first sun gear, the first outer ring gear drives the first planetary gear to rotate and drives the first carrier to rotate, so that the power is transmitted to the second clutch through the first carrier 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 transmitted to the first outer ring gear through the second carrier, because the first clutch and the second clutch are combined, the first carrier and the first sun gear have the same rotating speed, and the first planetary gear set as a whole transmits the power to the output shaft through the first clutch and the second clutch to drive the wheels to rotate.

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

[0014] Preferably, when the single-motor hybrid power transmission device is in the fourth gear, power of the motor is transmitted to the second carrier, the first brake limits the movement of the second sun gear, the second carrier drives the second planetary gear to rotate and drives the second ring gear to rotate, and the power of the motor is transmitted to the first ring gear through the second carrier due to the rigid connection between the second carrier and the first ring gear and the rigid connection between the second ring gear and the first carrier, the first carrier and the second ring gear rotate synchronously, and the first planetary gear and the first sun gear rotate, and the power is transmitted to the first clutch through the first sun gear 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 comprises: starting the engine when the single-motor hybrid power transmission device is in the second gear or the fourth gear, so that the single-motor hybrid power transmission device is in parallel mode, and the power of the engine is transmitted to the first clutch through the coupling, the input shaft, the one-way clutch and the first intermediate shaft.

[0016] Preferably, the transmission method of the single-motor hybrid power transmission device further comprises: 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 plate, so that the single-motor hybrid power transmission device starts the energy recovery mode, the motor changes from the driving mode to the generating mode, the power source of the motor is cut off and the excitation is applied, and the kinetic energy of the vehicle is converted into electric energy through the motor and flows to the power battery.

[0017] Preferably, the transmission method of the single-motor hybrid transmission device further comprises: in the state that the vehicle is parked or stopped, the first brake is engaged, the single-motor hybrid transmission device is in the parked power generation mode, the motor is applied with excitation, the power of the engine is transmitted to the first sun gear through the coupling, the input shaft and the first intermediate shaft, the power of the engine is split through the first carrier and the first ring gear of the first planetary gear set, and is combined after being transmitted to the second planetary gear set, since the second carrier is rigidly connected with the first ring gear, the second ring gear is rigidly connected with the first carrier, the first brake limits the movement of the second sun gear, so that the power of the engine drives the second carrier to rotate, and finally drives the motor to rotate, to realize the parked power generation.

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

[0019] The single-motor hybrid transmission device, the transmission method and the vehicle of the embodiments of the present application have only one motor and one engine, and are transmitted through two planetary gear sets, so that multiple gears and multiple mode working conditions can be realized, the transmission relationship between the first planetary gear set and the second planetary gear set is established by rigidly connecting the first ring gear of the first planetary gear set with the second carrier of the second planetary gear set and rigidly connecting the second ring gear of the second planetary gear set with the first carrier of the first planetary gear set, multiple transmission ratios are realized by selectively engaging the brake components and the clutch components, and the first planetary gear set and the second planetary gear set are arranged in a coaxial manner, so that the space and the configuration utilization rate can be provided, and thus the problems of single hybrid mode, single gear and low space utilization rate of the existing hybrid transmission structure can be effectively solved.

[0020] In order to make the above objectives, characteristics and advantages of the present application more apparent and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

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

[0023] Figure 2is a schematic diagram of a power transmission path of a single-motor hybrid transmission according to the present application in the first gear.

[0024] Figure 3 is a schematic diagram of a power transmission path of a single-motor hybrid transmission according to the present application in the second gear.

[0025] Figure 4 is a schematic diagram of a power transmission path of a single-motor hybrid transmission according to the present application in the third gear.

[0026] Figure 5 is a schematic diagram of a power transmission path of a single-motor hybrid transmission according to the present application in the fourth gear.

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

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

[0029] Figure 8 is a schematic diagram of a power transmission path of a single-motor hybrid transmission according to the present application in the parking power generation mode.

[0030] Figure 9 is a gear diagram of a single-motor hybrid transmission according to the present application.

[0031] Reference Signs: 1 - first planetary row; 11 - first sun gear; 12 - first carrier; 13 - first planetary gear; 14 - first outer gear; 2 - second planetary row; 21 - second sun gear; 22 - second carrier; 23 - second planetary gear; 24 - second outer 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; 8 - input shaft; 81 - coupling; 82 - one-way clutch; 9 - output shaft. DETAILED DESCRIPTION

[0032] The following detailed description is presented to aid the reader in gaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and thus particular embodiments described herein are not intended as being exhaustive of what the present disclosure can provide. For example, although processes are described with regard to the present disclosure, such processes can include more, fewer, or only a single process. Additionally, some processes can not be implemented even though they are described. Moreover, although processes are described herein as various separate processes, which can be performed by different systems, such processes can not necessarily be performed by different systems and the order of some processes can be changed, including that certain processes could be performed in an iterative or parallel manner. Additionally, various features that are described herein can be implemented as hardware, software, firmware, or combinations thereof, and can be implemented within one or more processors or external to one or more processors, including being implemented across multiple processors. Further, it will be appreciated that features described herein as being implemented with or across one or more processors can be implemented by one or more other processors.

[0033] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples are provided as illustration of some of the many possible implementations of the methods, apparatuses, and / or systems described herein.

[0034] Throughout the specification, when an element (such as a layer, region, or substrate) is referred to as being “on” another element, “connected to” another element, “coupled to” another element, “in contact with” another element, or “covering” another element, it can be directly on, connected, coupled, in contact with, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being “directly on,” “directly connected to,” “directly coupled to,” “directly in contact with,” or “directly covering” another element, there are no other elements interposed therebetween.

[0035] As used herein, the term “and / or” includes any one of the listed items and any combination of two or more of the listed items.

[0036] Although terms such as “first,” “second,” and “third” can be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, the element, component, region, layer, or section referred to as the first element, component, region, layer, or section in the examples described herein can also be referred to as the second element, component, region, layer, or section without departing from the teachings of the examples.

[0037] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations 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 relation terms used herein will be interpreted accordingly.

[0038] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0039] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0040] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0041] like Figure 1 As shown, according to a first aspect of the present invention, a single-motor hybrid power transmission device is provided, the single-motor hybrid power transmission device including an engine 5, a motor 6, a braking component, a clutch component, a first planetary gear set 1, and a second planetary gear set 2.

[0042] In the following description, reference will be made to Figure 1 This section provides a detailed description of the specific structure of the aforementioned components of the single-motor hybrid power transmission device and the connection relationships between these components.

[0043] like Figure 1As shown, in the embodiment, the single-motor hybrid power transmission device can include only one engine 5 and only one motor 6, and can achieve multi-mode and multi-gear driving in this way. Specifically, the first planetary gear set 1 can include a first sun gear 11, a first carrier 12, a first planet gear 13, and a first ring gear 14. The first sun gear 11 and the first carrier 12 can be connected with a clutch component. The clutch component can be connected with an output shaft 9 for driving the wheels of the vehicle to rotate. The first sun gear 11 can also be connected with an engine 5 for providing power to drive the first sun gear 11 to rotate. The first sun gear 11 can also be connected with a brake component for limiting the movement of the connected component. The second planetary gear set 2 can include a second sun gear 21, a second carrier 22, a second planet gear 23, and a second ring gear 24. The second sun gear 21 can be connected with a brake component. The second carrier 22 can be connected with a motor 6 (for example, through a spline connection) for providing power to drive the second carrier 22 to rotate. The second carrier 22 can also be rigidly connected with the first ring gear 14 (i.e., formed as one rigid whole or connected as one whole through fixed connection, such as welding), so that the rotational speed of the second carrier 22 and the first ring gear 14 remains consistent. The second ring gear 24 can be rigidly connected with the first carrier 12 (for example, welded), so that the rotational speed of the second ring gear 24 and the first carrier 12 remains consistent. In this way, the transmission relationship between the first planetary gear set 1 and the second planetary gear set 2 can be established to achieve various transmission ratios. In addition, by arranging 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, the space utilization of the single-motor hybrid power transmission device can be greatly improved, and the stacking of multiple parallel shafts can be avoided.

[0044] It should be noted that the operation of the planetary gear set requires locking one of the components or fixing the rotational speed of one of the components. The purpose of arranging the brake component is to limit the movement of the components in the planetary gear set to ensure the normal operation of the planetary gear set. Further explanation: it is not necessary to ensure that one of the components in the first planetary gear set 1 or the second planetary gear set 2 is locked, but it is sufficient to fix the rotational speed of one of the components in the first planetary gear set 1 or the second planetary gear set 2, and to use the relative rotational movement of the remaining components relative to the component with fixed rotational speed to achieve the transmission principle of the planetary gear set.

[0045] Preferably, as Figure 1As shown in the embodiments, the braking component can include a first brake 31 and a second brake 32. The first brake 31 can be connected with the second sun gear 21, and the second brake 32 can be connected with the first sun gear 11. 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 arranged), so that the single-motor hybrid power transmission device can selectively combine the first brake 31 and the second brake 32 to control the power transmission path.

[0046] Preferably, as shown in the embodiments, the clutching component can include a first clutch 41 and a second clutch 42. The first clutch 41 can be connected with the first sun gear 11, and the second clutch 42 can be connected with the first carrier 12. The first clutch 41 and the second clutch 42 are both 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 combine the first clutch 41 and the second clutch 42 to control the power transmission path. Figure 1 Further, preferably, as shown in the embodiments, the single-motor hybrid power transmission device can further include an input shaft 8, a first intermediate shaft 71, and a second intermediate shaft 72. The first end of the first intermediate shaft 71 (which can be the left end of the first intermediate shaft 71 as shown) can be connected with the first clutch 41. The second end of the first intermediate shaft 71 (which can be the right end of the first intermediate shaft 71 as shown) can be connected with the second brake 32. The first planetary set 1 can be arranged between the first clutch 41 and the second brake 32. Specifically, the first sun gear 11 of the first planetary set 1 can be connected with the first intermediate shaft 71 to achieve the connection of the first sun gear 11 with the first clutch 41 and the second brake 32. The input end of the input shaft 8 can be connected with the power system of the engine 5 through a coupler 81 (e.g., a spline connection). The output end of the input shaft 8 can be connected with the second end of the first intermediate shaft 71 through a one-way clutch 82. This enables the first sun gear 11 to be connected with the engine 5 through the first intermediate shaft 71. The two ends of the second intermediate shaft 72 can be respectively connected with the first brake 31 and the second sun gear 21 (i.e., the second sun gear 21 is connected with the first brake 31 through the second intermediate shaft 72). In this way, the single-motor hybrid power transmission device can selectively combine the braking component and the clutching component to control the power transmission path, achieve various transmission ratios, and further achieve multi-mode and multi-gear driving.

[0047] Figure 1 Figure 1 Figure 1

[0048] ​​​​It should be further noted that the shafts and gears can be connected by keys. The clutch members and brake members can be connected by splines. This improves the stability of the connection, and further improves the stability and accuracy of power transmission.

[0049] Further, as Figure 2 to Figure 9 indicated, a single-motor hybrid power transmission device according to a second aspect of the present application is provided. The single-motor hybrid power transmission device can be the single-motor hybrid power transmission device as described above. The method for driving the single-motor hybrid power transmission device includes engaging the first clutch 41 and the second clutch 42 or engaging one of the first clutch 41 and the second clutch 42 with one of the first brake 31 and the second brake 32, thereby achieving a plurality of gear positions.

[0050] Preferably, as Figure 2 to Figure 5 and Figure 9 indicated, in an embodiment, the plurality of gear positions can include a first gear position (EV1) in which the second clutch 42 and the second brake 32 are engaged, a second gear position (EV2) in which the first clutch 41 and the second clutch 42 are engaged, a third gear position (EV3) in which the second clutch 42 and the first brake 31 are engaged, and a fourth gear position (EV4) in which the first clutch 41 and the first brake 31 are engaged.

[0051] Specifically, as Figure 2 indicated, in an embodiment, the second clutch 42 and the second brake 32 are engaged, and the single-motor hybrid power transmission device is in the first gear position (EV1). In this case, the power of the motor 6 is transmitted to the second carrier 22. Since the second carrier 22 is rigidly connected to the first outer ring 14, the second carrier 22 has the same rotational speed as the first outer ring 14. That is, the power of the motor 6 is transmitted to the first outer ring 14 through the second carrier 22. And since the second brake 32 is engaged, the second brake 32 restricts the rotation of the first sun gear 11, so the rotational speed of the first sun gear 11 is 0. This allows the first outer ring 14 to drive the first planet gears 13 to revolve, thereby driving the first carrier 12 to rotate (i.e., revolve). The power of the motor 6 is transmitted to the second clutch 42 through the first carrier 12, and ultimately to the output shaft 9, to drive the wheels of the vehicle to rotate.

[0052] Preferably, as Figure 3As shown, in this embodiment, the first clutch 41 and the second clutch 42 are engaged, placing the single-motor hybrid power transmission device in the second gear (EV2). In this case, the power of the motor 6 is transmitted to the second planetary carrier 22. Since the second planetary carrier 22 is rigidly connected to the first external ring gear 14, the second planetary carrier 22 and the first external ring gear 14 rotate at the same speed. That is, the power of the motor 6 is transmitted to the first external ring gear 14 of the first planetary gear set 1 via the second planetary carrier 22. Due to the engagement of the first clutch 41 and the second clutch 42, the rotational speeds of the first planetary carrier 12 and the first sun gear 11 are the same as the rotational speed of the output shaft 9, thereby making the rotational speeds of the first planetary carrier 12 and the first sun gear 11 the same. That is, after the power of the motor 6 is transmitted to the first planetary gear set 1, the first planetary gear set 1, as a whole, transmits the power through the first planetary carrier 12 and the first sun gear 11 to the first clutch 41 and the second clutch 42, and finally to the output shaft 9 to drive the wheels of the vehicle to rotate. In this case, the rotational speed of the output shaft 9 (i.e., the output speed) is the same as the rotational speed of the first external gear ring 14 (i.e., the input speed).

[0053] Preferred, such as Figure 4 As shown, in this embodiment, the second clutch 42 and the first brake 31 are engaged, placing the single-motor hybrid power transmission device in the third gear (EV3). In this state, the power of the motor 6 is transmitted to the second planetary carrier 22. Because the first brake 31 is engaged, it restricts the rotation of the second sun gear 21, resulting in a rotational speed of 0. This allows the second planetary carrier 22 to drive the second planet gear 23 to revolve, thereby driving the second external ring gear 24 to rotate (i.e., spin). The power of the motor 6 is transmitted through the second external ring gear 24 to the second clutch 42, and finally to the output shaft 9 to drive the vehicle's wheels.

[0054] Preferred, such as Figure 5As shown, in this embodiment, the first clutch 41 and the first brake 31 are engaged, placing the single-motor hybrid power transmission device in the fourth gear (EV4). In this case, the power of the motor 6 is transmitted to the second planetary carrier 22. Because the first brake 31 is engaged, it restricts the rotation of the second sun gear 21, resulting in a rotational speed of 0. This allows the second planetary carrier 22 to drive the second planetary gear 23 to rotate (i.e., rotate), thereby driving the second external gear ring 24 to rotate (i.e., rotate). Since the second external gear ring 24 is rigidly connected to the first planetary carrier 12, the first planetary carrier 12 and the second external gear ring 24 rotate at the same speed. Furthermore, since the second planetary carrier 22 is rigidly connected to the first external gear ring 14, the second planetary carrier 22 and the first external gear ring 14 rotate at the same speed, meaning the power of the motor 6 is transmitted to the first external gear ring 14 via the second planetary carrier 22. Therefore, with the rotational speed of the first planetary carrier 12 being constant, the first external gear ring 14 can drive the first planetary gear 13 to rotate, thereby driving the first sun gear 11 to rotate. The power of the motor 6 is transmitted through the first sun gear 11 to the first clutch 41, and finally to the output shaft 9 to drive the wheels of the vehicle to rotate.

[0055] Further optimized, such as Figure 6 and Figure 7 As shown, in this 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 second gear or the fourth gear, so that the single-motor hybrid power transmission device is in parallel mode, where both the motor 6 and the engine 5 can provide power. That is, when the vehicle is in the second gear or the fourth gear, the vehicle can engage the engine 5 to drive according to power demand, thereby increasing the vehicle's power. After the engine 5 starts, the power of the engine 5 passes sequentially through the coupler 81, the input shaft 8, the one-way clutch 82, and the first intermediate shaft 71, and is finally transmitted to the first clutch 41. In this case, the power of the engine 5 engages in the single-motor hybrid power transmission device, so that the engine 5 and the motor 6 jointly drive the vehicle's wheels to rotate. The one-way clutch 82 can prevent the power of the motor 6 from being transmitted to the engine 5, thereby avoiding energy loss and extending the life of the engine 5.

[0056] Specifically, such as Figure 6 As shown, in this embodiment, when the single-motor hybrid power transmission device is in the parallel mode of the second gear, the first clutch 41 and the second clutch 42 are engaged. Power from the engine 5 is transmitted to the first clutch 41 via the first intermediate shaft 71. The power transmission process of the motor 6 is then... Figure 3In the embodiment, in the case where the single-motor hybrid power transmission device is in the fourth gear in the parallel mode, the first clutch 41 is engaged, and the power of the engine 5 is transmitted to the first clutch 41 via the first intermediate shaft 71. The power transmission process of the motor 6 is similar to that in the case of the third gear in the parallel mode, which will not be described herein again. Finally, the power of the engine 5 and the power of the motor 6 are jointly transmitted to the output shaft 9 via the first clutch 41.

[0057] As shown in FIG. 6, in the embodiment, in the case where the single-motor hybrid power transmission device is in the fourth gear in the parallel mode, the first clutch 41 is engaged, and the power of the engine 5 is transmitted to the first clutch 41 via the first intermediate shaft 71. The power transmission process of the motor 6 is similar to that in the case of the third gear in the parallel mode, which will not be described herein again. Finally, the power of the engine 5 and the power of the motor 6 are jointly transmitted to the output shaft 9 via the first clutch 41. Figure 7 Figure 5 As shown in FIG. 6, in the embodiment, in the case where the single-motor hybrid power transmission device is in the fourth gear in the parallel mode, the first clutch 41 is engaged, and the power of the engine 5 is transmitted to the first clutch 41 via the first intermediate shaft 71. The power transmission process of the motor 6 is similar to that in the case of the third gear in the parallel mode, which will not be described herein again. Finally, the power of the engine 5 and the power of the motor 6 are jointly transmitted to the output shaft 9 via the first clutch 41.

[0058] In addition, preferably, in the embodiment, the transmission method of the single-motor hybrid power transmission device further comprises, in the case where 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 steps on the brake plate to make the single-motor hybrid power transmission device start the energy recovery mode. In the first gear, the second gear, the third gear, the fourth gear and the parallel mode, the energy flows are all converted from the electric energy of the power battery into kinetic energy by the motor to finally drive the vehicle. In the energy recovery mode, the vehicle detects the braking intention of the driver, cuts off the power source of the motor 6, and controls the motor 6 to apply excitation to the motor 6 by the controller to change the motor 6 from the driving mode to the generating mode, i.e., to convert the motor 6 into a generator to generate electricity (in the process of generating electricity, the motor 6 can be regarded as a load or a resistance device to brake the vehicle). Thus, the kinetic energy of the vehicle can be converted into electric energy to flow to the power battery to achieve energy recovery and avoid energy waste after braking. In this process, the combination states of the clutch components and the brake components of the single-motor hybrid power transmission device do not change, i.e., are the same as those in the driving mode at the moment before braking.

[0059] Preferably, as shown in FIG. 6, in the embodiment, in the case where the single-motor hybrid power transmission device is in the fourth gear in the parallel mode, the first clutch 41 is engaged, and the power of the engine 5 is transmitted to the first clutch 41 via the first intermediate shaft 71. The power transmission process of the motor 6 is similar to that in the case of the third gear in the parallel mode, which will not be described herein again. Finally, the power of the engine 5 and the power of the motor 6 are jointly transmitted to the output shaft 9 via the first clutch 41. Figure 8 ​As shown, in this embodiment, the transmission method of the single-motor hybrid power transmission device further includes engaging the first brake 31 when the vehicle is parked or stationary, so that the single-motor hybrid power transmission device is in a parking power generation mode. In this case, the motor 6 is in a power generation mode (i.e., the motor 6 is energized). 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, and finally to the first sun gear 11. The power of the engine 5 is split by the first planet carrier 12 and the first external ring gear 14 of the first planetary gear set 1, and then merged after being transmitted to the second planetary gear set 2. That is, since the second planet carrier 22 is rigidly connected to the first external ring gear 14, and the second external ring gear 24 is rigidly connected to the first planet carrier 12, the first part of the power transmitted to the first sun gear 11 is transmitted by the first planet carrier 12 to the second external ring gear 24 of the second planetary gear set 2, and the second part of the power is transmitted by the first external ring gear 14 to the second planet carrier 22 of the second planetary gear set 2. Furthermore, since the first brake 31 restricts the movement of the second sun gear 21, the rotational speed of the second sun gear 21 is 0. Therefore, the first part of the power can be transmitted to the second planetary carrier 22 through the second external gear ring 24. The first part of the power and the second part of the power together drive the second planetary carrier 22 to rotate, and finally drive the motor 6 to rotate, so as to realize power generation while the vehicle is stopped.

[0060] like Figure 9 As shown in the embodiment, the transmission method of the single-motor hybrid power transmission device enables four-speed transmission of the generator 6 and joint power supply by the motor 6 and the engine 5, namely, first-speed (EV1) transmission, second-speed (EV2) transmission, third-speed (EV3) transmission, and fourth-speed (EV4) transmission, as well as parallel mode. The wheel speeds increase sequentially in the first, second, third, and fourth speeds. The transmission method of the single-motor hybrid power transmission device also enables parking power generation (i.e., parking power generation mode) and braking energy recovery (i.e., energy recovery mode). This allows the single-motor hybrid power transmission device to achieve multiple hybrid modes and multiple power output levels to meet actual working conditions and needs, thus helping to reduce energy consumption.

[0061] Furthermore, according to a third aspect of the present invention, a vehicle is provided, the vehicle including the single-motor hybrid power transmission device as described above.

[0062] In use, the vehicle establishes the transmission relationship between the first planetary row 1 and the second planetary row 2 by rigidly connecting the first outer ring gear 14 of the first planetary row 1 with the second carrier 22 of the second planetary row 2, and rigidly connecting the second outer ring gear 24 of the second planetary row 2 with the first carrier 12 of the first planetary row 1, and realizes the transmission form of multiple transmission ratios. The first planetary row 1 and the second planetary row 2 are coaxially arranged, so that the space utilization of the single-motor hybrid power transmission device can be improved. The vehicle controls the power transmission path in the single-motor hybrid power transmission device by selectively combining the first brake 31, the second brake 32, the first clutch 41 and the second clutch 42, thereby realizing multi-mode and multi-gear driving, and achieving the functions of energy recovery during travel and power generation during parking.

[0063] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any person skilled in the art can make modifications or easily think of changes to the technical solutions described in the foregoing embodiments, or make equivalent replacements to some technical features thereof, within the technical scope disclosed by the present application. Such modifications, changes or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A single-motor hybrid power transmission device installed in a vehicle, characterized by comprising: The single-motor hybrid power transmission device comprises: an engine; a motor; a brake component; a clutch component connected to an output shaft for driving a wheel; a first planetary gear set comprising a first sun gear, a first carrier, a first planet gear and a first ring gear, the first sun gear being connected to the engine, the first sun gear being connected to the clutch component, the first sun gear being connected to the brake component, the first carrier being connected to the clutch component; and a second planetary gear set coaxially arranged with the first planetary gear set, the second planetary gear set comprising a second sun gear, a second carrier, a second planet gear and a second ring gear, the second carrier being rigidly connected to the first ring gear, the second carrier being connected to the motor, the second ring gear being rigidly connected to the first carrier, the second sun gear being connected to the brake component; the brake component comprising a first brake and a second brake arranged independently of each other, the first brake being connected to the second sun gear, the second brake being connected to the first sun gear; the clutch component comprising a first clutch and a second clutch arranged in parallel with each other, the first clutch being connected to the first sun gear, the second clutch being connected to the first carrier; the single-motor hybrid power transmission device further comprising: a first intermediate shaft, a first end of the first intermediate shaft being connected to the first clutch, a second end of the first intermediate shaft being connected to the second brake, the first planetary gear set being arranged between the first clutch and the second brake, the first sun gear being connected to the first intermediate shaft; a second intermediate shaft, two ends of the second intermediate shaft being connected to the first brake and the second sun gear respectively; an input shaft, an input end of the input shaft being connected to the engine through a coupling, an output end of the input shaft being connected to the second end of the first intermediate shaft through a one-way clutch.

2. A drive method of a single-motor hybrid power transmission device, characterized by, The single-motor hybrid power transmission device of claim 1, a transmission method of the single-motor hybrid power transmission device comprising: realizing multiple gear positions 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 drive method of the single-motor hybrid transmission device according to claim 2, characterized by, The multiple gear positions comprising a first gear position combining the second clutch and the second brake, a second gear position combining the first clutch and the second clutch, a third gear position combining the second clutch and the first brake, and a fourth gear position combining the first clutch and the first brake.

4. The single-motor hybrid power transmission apparatus drive method according to claim 3, characterized by, When the single-motor hybrid power transmission device is in the first gear position, power of the motor is transmitted to the first ring gear through the second carrier, the second brake limits the movement of the first sun gear, the first ring gear drives the first planet gear to rotate and drives the first carrier to rotate, power is transmitted to the second clutch through the first carrier, and finally transmitted to the output shaft to drive the wheel to rotate.

5. The single-motor hybrid power transmission apparatus drive method according to claim 3, characterized by, When the single-motor hybrid power transmission device is in the second gear, the power of the motor is transmitted to the first outer ring gear through the second carrier, and the first carrier and the first sun gear rotate at the same speed due to the engagement of the first clutch and the second clutch. The first planetary gear set as a whole transmits the power to the output shaft through the first clutch and the second clutch to drive the wheels to rotate.

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

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

8. The drive method of the single-motor hybrid transmission according to any one of claims 3 to 7, characterized by, The transmission method of the single-motor hybrid power transmission device comprises: When the single-motor hybrid power transmission device is in the second gear or the fourth gear, the engine is started to make the single-motor hybrid power transmission device in parallel mode. The power of the engine is transmitted to the first clutch through the coupling, the input shaft, the one-way clutch and the first intermediate shaft.

9. The single-motor hybrid power transmission apparatus drive method according to claim 8, characterized by, The transmission method of the single-motor hybrid power transmission device further comprises: 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 plate to make the single-motor hybrid power transmission device start the energy recovery mode. The motor changes from the driving mode to the generating mode, the power source of the motor is cut off and the excitation is applied. The kinetic energy of the vehicle is converted into electric energy by the motor and flows to the power battery.

10. The method of driving a single-motor hybrid power transmission device according to any one of claims 3 to 7, characterized by, The transmission method of the single-motor hybrid power transmission device further comprises: In the state that the vehicle is parked or stopped, the first brake is engaged, the single-motor hybrid power transmission device is in the parked power generation mode, the motor is applied with excitation, the power of the engine is transmitted to the first sun gear through the coupling, the input shaft and the first intermediate shaft, the power of the engine is split through the first planetary carrier and the first outer ring, and is combined after being transmitted to the second planetary gear set, since the second planetary carrier is rigidly connected with the first outer ring and the first planetary carrier is rigidly connected with the second outer ring, the first brake limits the movement of the second sun gear, so that the power of the engine drives the second planetary carrier to rotate, and finally drives the motor to rotate, to realize parked power generation.

11. A vehicle characterized by comprising: The vehicle comprises the single-motor hybrid power transmission device of claim 1.

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