Multi-speed electromechanical hybrid system and vehicle

Abstract

This invention relates to the field of hybrid vehicle technology, and in particular to a multi-gear electromechanical hybrid system and vehicle. The multi-gear electromechanical hybrid system includes: an engine with an engine shaft; a generator with a generator shaft, on which a first gear shifter is mounted; an input shaft coaxial with the engine shaft and on which a second gear shifter is mounted; and an intermediate shaft with a third gear shifter. Three-gear adjustment is achieved by controlling the first, second, and third gear shifters to be in different engaged or disengaged states. A braking component and a fourth gear shifter can be engaged or disengaged with a planetary gear set mechanism to achieve two-gear adjustment. An output shaft is connected to the planetary gear set mechanism, and a drive motor can transmit power to the output shaft. The combination of the second and third components of this invention enables six-gear adjustment, offering advantages such as multiple gears, simple structure, and high vehicle power and fuel economy.

Description

Technical Field

[0001] This invention relates to the field of hybrid vehicle technology, and in particular to a multi-speed electromechanical hybrid system and vehicle. Background Technology

[0002] The development of new energy vehicles can not only reduce dependence on oil but also alleviate environmental pollution. As a major type of new energy vehicle, hybrid vehicles have become a key area of ​​automotive development. Compared to pure electric vehicles, hybrid vehicles have lower requirements for battery performance, and internal combustion engine technology is already mature. They can be implemented simply by improving upon traditional internal combustion engine vehicles. Therefore, hybrid vehicles are the most suitable type of vehicle to meet current environmental standards.

[0003] In existing technologies, the main drive methods for power systems include electric motor-coupled planetary gear shifting, electric motor-coupled synchronizer shifting, and wheel-side drive. Among these, the planetary gear carrier requires high material and machining precision; electric motor-coupled synchronizer shifting is prone to power interruption during shifting; and the distributed installation of wheel-side drive motors presents numerous technical challenges in terms of structural layout, thermal management, electromagnetic compatibility, and vibration control. Furthermore, the transmission design has many shortcomings, such as large speed ratio steps between adjacent gears, a narrow transmission ratio range, and unclear advantages in economy and power. Moreover, current dual-motor hybrid systems are mostly single- or two-gear systems, which cannot meet the ever-increasing demands for vehicle economy and power, and increasing the number of gears leads to a more complex system structure and larger size. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a multi-gear electromechanical hybrid system and vehicle to solve the problems that existing dual-motor hybrid systems are mostly single-gear or two-gear, which cannot meet the ever-increasing demands for vehicle economy and power, and that the increase in gears leads to complex system structure and large size.

[0005] The first aspect of the present invention provides a multi-speed electromechanical hybrid power system, comprising a first component, a second component, a third component, and a fourth component;

[0006] The first component includes an engine having an engine shaft;

[0007] The second component includes a generator, an input shaft, and an intermediate shaft. The generator has a generator shaft with a first gear shifter. The input shaft is coaxial with the engine shaft and has a second gear shifter. The intermediate shaft has a third gear shifter. By controlling the first, second, and third gear shifters to be in different engaged or disengaged states, three-gear adjustment can be achieved.

[0008] The third component includes a planetary gear set mechanism, a braking component, and a fourth gear shifter. The braking component and the fourth gear shifter can be engaged or disengaged from the planetary gear set mechanism, respectively, to achieve two-gear adjustment.

[0009] The fourth component includes a drive motor and an output shaft. The output shaft is connected to the planetary gear mechanism, and the drive motor is capable of transmitting power to the output shaft.

[0010] Preferably, it further includes:

[0011] A gear set is connected to the second component; the gear set includes a first gear and a second gear disposed on the generator shaft, a third gear, a fourth gear, a fifth gear and a sixth gear disposed on the input shaft, and a seventh gear, an eighth gear and a ninth gear disposed on the intermediate shaft; the first gear, the fourth gear, the sixth gear, the seventh gear and the eighth gear are loosely fitted.

[0012] A transmission assembly is connected to the fourth assembly; the drive motor has a drive motor shaft, and the transmission assembly is disposed between the drive motor shaft and the output shaft.

[0013] Preferably, the first gear and the third gear mesh to form a first gear pair, the fourth gear meshes with the second gear and the seventh gear to form a second gear pair, the fifth gear and the eighth gear mesh to form a third gear pair, and the sixth gear and the ninth gear mesh to form a fourth gear pair;

[0014] And / or, the transmission assembly includes a tenth gear and an eleventh gear that are meshed together, the tenth gear being fixedly mounted on the output shaft and the eleventh gear being fixedly mounted on the drive motor shaft.

[0015] Preferably, the second gear is fixedly mounted on the generator shaft, and the first gear shifting component is fixedly connected to the second gear and can engage or disengage with the first gear;

[0016] The second gear shifter is fixedly connected to the input shaft, and the sixth gear is fixedly connected to the planetary gear mechanism. The engagement or disengagement of the second gear shifter with the sixth gear realizes the connection or disengagement of the second component and the third component.

[0017] The third gear shifter is fixedly connected to the intermediate shaft. The third gear shifter has a first shifting part and a second shifting part. The first shifting part can engage or disengage with the seventh gear, and the second shifting part can engage or disengage with the eighth gear.

[0018] Preferably, the planetary gear mechanism includes a sun gear, planet gears, and an external gear ring. The sun gear has a connecting shaft coaxially arranged with the input shaft. The planet gears mesh with the sun gear and the external gear ring respectively. The planet carrier supporting the planet gears is connected to the output shaft. The external gear ring is loosely fitted on the output shaft.

[0019] The fourth gear shifter and the brake can engage or disengage with the external gear ring, respectively.

[0020] Preferably, the fourth gear shifting component is fixedly mounted on the output shaft;

[0021] When the fourth gear shifter engages with the external gear ring, the brake component disengages from the external gear ring; when the brake component engages with the external gear ring, the fourth gear shifter disengages from the external gear ring.

[0022] Preferably, the first gear shifter and the fourth gear shifter are clutches, and the third gear shifter and the fourth gear shifter are synchronizers.

[0023] Preferably, the first component further includes:

[0024] A torsional damper is disposed between the engine shaft and the input shaft;

[0025] A flywheel is provided at the end of the engine shaft, and the torsional damper is connected to the flywheel.

[0026] Preferably, it further includes:

[0027] A clutch element, located at one end of the input shaft near the engine, is used to control the engagement or disengagement of the first component and the second component.

[0028] A second aspect of the present invention provides a vehicle comprising the multi-speed electromechanical hybrid system described in any of the above embodiments.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] The multi-gear electromechanical hybrid system of the present invention adopts power coupling between the engine and the drive motor. Three-gear adjustment is achieved by controlling the engagement or disengagement of the three gear switching components in the second component, and combined with the two-gear adjustment of the planetary gear mechanism, thereby realizing the function of six-gear adjustment. It has the advantages of multiple gears, simple structure, and high power and fuel economy of the whole vehicle. While ensuring power and economy, it reduces vehicle emissions and meets environmental protection requirements.

[0031] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the structure of a multi-gear electromechanical hybrid power system provided for an embodiment of the present invention;

[0034] Figure 2 A schematic diagram illustrating the working principle of the second component in the first gear position in a multi-gear electromechanical hybrid power system provided for an embodiment of the present invention;

[0035] Figure 3 A schematic diagram illustrating the working principle of the second component in the second gear position in a multi-gear electromechanical hybrid power system provided for an embodiment of the present invention;

[0036] Figure 4 A schematic diagram illustrating the working principle of the second component in the third gear position in a multi-gear electromechanical hybrid power system provided for an embodiment of the present invention;

[0037] Figure 5 A schematic diagram illustrating the working principle of the third component in the first gear position in a multi-gear electromechanical hybrid power system provided for an embodiment of the present invention;

[0038] Figure 6 A schematic diagram illustrating the working principle of the third component in the second gear position in a multi-gear electromechanical hybrid power system provided for an embodiment of the present invention.

[0039] Icons: 10-First component; 11-Engine; 111-Engine shaft; 20-Second component; 21-Generator; 211-Generator shaft; 22-Input shaft; 23-Intermediate shaft; 24-First gear shifter; 25-Second gear shifter; 26-Third gear shifter; 201-First gear; 202-Second gear; 203-Third gear; 204-Fourth gear; 205-Fifth gear; 206-Sixth gear; 20 7-Seventh gear; 208-Eighth gear; 209-Ninth gear; 30-Third assembly; 31-Sun gear; 311-Connecting shaft; 32-Planet gear; 33-External gear ring; 34-Brake component; 35-Fourth gear shifter; 40-Fourth assembly; 41-Drive motor; 411-Drive motor shaft; 42-Output shaft; 401-Tenth gear; 402-Eleventh gear; 50-Torsion damper; 60-Flywheel; 70-Clutch component. Detailed Implementation

[0040] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after 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; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0041] PA24004669

[0042] 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 feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0043] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0044] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0045] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0046] 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.

[0047] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. 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.

[0048] 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.

[0049] 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.

[0050] According to a first aspect of the present invention, a multi-speed electromechanical hybrid power system is provided, comprising a first component 10, a second component 20, a third component 30, and a fourth component 40.

[0051] The specific structure of the above-described components of the multi-speed electromechanical hybrid power system according to this embodiment will be described below.

[0052] In this embodiment, as Figure 1 As shown, the first component 10 includes an engine 11, which has an engine shaft 111. The first component 10, the second component 20, the third component 30, and the fourth component 40 are arranged sequentially along the extension direction of the engine shaft 111. In a preferred embodiment, a flywheel 60 is provided at the end of the engine shaft 111 for storing the energy of the engine 11.

[0053] The second component 20 includes a generator 21, an input shaft 22, and an intermediate shaft 23. The generator 21 has a generator shaft 211. The generator shaft 211, input shaft 22, and intermediate shaft 23 are arranged parallel to each other and spaced apart, extending in the same direction as the engine shaft 111. Specifically, a first gear shifter 24 is provided on the generator shaft 211. The input shaft 22 is coaxially arranged with the engine shaft 111, allowing power output from the engine 11 to be transmitted to the input shaft 22. A second gear shifter 25 is provided on the input shaft 22, and a third gear shifter 26 is provided on the intermediate shaft 23. By controlling the first gear shifter 24, second gear shifter 25, and third gear shifter 26 to different engaged or disengaged states, the power output from the engine 11 forms three transmission paths, achieving three gear adjustments. When the third gear shifter 26 is engaged, the second component 20 and the third component 30 are connected, allowing the engine 11 to transmit power to the planetary gear set mechanism described below.

[0054] The third component 30 includes a planetary gear train mechanism, a brake 34, and a fourth gear shifter 35. The brake 34 and the fourth gear shifter 35 can be engaged or disengaged from the planetary gear train mechanism, so that the power delivered from the second component 20 forms two delivery paths to achieve two gear adjustments.

[0055] The fourth component 40 includes a drive motor 41 and an output shaft 42. The output shaft 42 is preferably coaxially arranged with the input shaft 22. The output shaft 42 is connected to the planetary gear mechanism, so that the planetary gear mechanism can transmit the second power to the output shaft 42. The drive motor 41 has a drive motor shaft 411, and the drive motor 41 can also transmit power to the output shaft 42 to realize the working condition of the engine 11 and / or the drive motor 41.

[0056] Specifically, such as Figure 1 As shown, the multi-speed electromechanical hybrid power system transmission assembly also includes a transmission component connected to the fourth component 40. This transmission component is disposed between the drive motor shaft 411 and the output shaft 42, and is used to transmit the power output from the drive motor 41 to the output shaft 42. In a preferred embodiment, the transmission component includes a tenth gear 401 and an eleventh gear 402 that are meshed together. The tenth gear 401 is fixedly disposed on the output shaft 42, and the tenth gear 401 and the output shaft 42 can be keyed together. The eleventh gear 402 is fixedly disposed on the drive motor shaft 411, and the eleventh gear 402 and the drive motor shaft 411 can also be keyed together.

[0057] This invention arranges and combines the three-gear adjustment of the second component 20 and the two-gear adjustment of the third component 30 to enable the multi-gear electromechanical hybrid system to have a six-gear adjustment function. By changing the gear, the engine 11 and the drive motor 41 can work in the high-efficiency range for a long time, meeting the needs of the continuous improvement of the vehicle's economy and power.

[0058] Furthermore, such as Figure 1 As shown, the multi-gear electromechanical hybrid system also includes a gear set connected to the second component 20. The power output by the engine 11 is transmitted between the generator 21, the input shaft 22, and the intermediate shaft 23 through the meshing transmission of the gear set. Specifically, the gear set includes a first gear 201 and a second gear 202 mounted on the generator shaft 211, a third gear 203, a fourth gear 204, a fifth gear 205, and a sixth gear 206 mounted on the input shaft 22, and a seventh gear 207, an eighth gear 208, and a ninth gear 209 mounted on the intermediate shaft 23. Among them, the first gear 201, the fourth gear 204, the sixth gear 206, the seventh gear 207, and the eighth gear 208 are loosely fitted.

[0059] Furthermore, in this embodiment, as Figure 1 As shown, the first gear 201 and the third gear 203 mesh to form a first gear pair, the fourth gear 204 meshes with the second gear 202 and the seventh gear 207 respectively to form a second gear pair, the fifth gear 205 and the eighth gear 208 mesh to form a third gear pair, and the sixth gear 206 and the ninth gear 209 mesh to form a fourth gear pair.

[0060] The second gear 202 is fixedly mounted on the generator shaft 211. The first gear shifter 24 is fixedly connected to the second gear 202 and can engage or disengage with the first gear 201, thus realizing the connection between the input shaft 22 and the generator shaft 211. When the first gear shifter 24 is engaged, the engine 11 starts and drives the generator 21 to generate electricity, and the power of the engine 11 can be transmitted to the second gear pair through the first gear pair.

[0061] The second gear shifter 25 is fixedly connected to the input shaft 22, and the sixth gear 206 is fixedly connected to the planetary gear set mechanism. The engagement or disengagement of the second gear shifter 25 and the sixth gear 206 realizes the connection or disengagement of the second component 20 and the third component 30. Specifically, when the second gear shifter 25 and the sixth gear 206 are engaged, power can be transmitted from the input shaft 22 to the planetary gear set mechanism; when the second gear shifter 25 and the sixth gear 206 are disengaged, power can be transmitted from the intermediate shaft 23 to the planetary gear set mechanism via the fourth gear pair.

[0062] The third gear shifter 26 is fixedly connected to the intermediate shaft 23. The third gear shifter 26 has a first shifting part and a second shifting part. The first shifting part can engage or disengage with the seventh gear 207, and the second shifting part can engage or disengage with the eighth gear 208. When the first shifting part is engaged, the second shifting part is disengaged; when the second shifting part is engaged, the first shifting part is disengaged, so that when the third gear shifter 26 is engaged, it can only connect with one gear (i.e., the seventh gear 207 or the eighth gear 208) to enable the second gear pair or the third gear pair to transmit power to the intermediate shaft 23.

[0063] Specifically, when the second component 20 is in the first gear position, such as Figure 2 As shown, the first gear shifter 24 is engaged, the second gear shifter 25 is disengaged, and the third gear shifter 26 is engaged with the seventh gear 207. The power output from the engine 11 passes sequentially through the input shaft 22 → first gear pair → second gear pair → intermediate shaft 23 → fourth gear pair. When the second component 20 is in the second gear position, as shown... Figure 3 As shown, the first gear shifter 24 is in the off state, the second gear shifter 25 is in the off state, and the third gear shifter 26 is in the engaged state with the eighth gear 208. The power output from the engine 11 passes sequentially through the input shaft 22 → the third gear pair → the intermediate shaft 23 → the fourth gear pair. When the second component 20 is in the third gear, as... Figure 4 As shown, the first gear shifter 24 is in the off state, the second gear shifter 25 is in the engaged state, and the third gear shifter 26 is in the off state. The power output by the engine 11 passes through the input shaft 22 and the sixth gear 206 in sequence.

[0064] Furthermore, in this embodiment, such as Figure 1 As shown, the planetary gear mechanism includes a sun gear 31, planet gears 32, and an external gear ring 33. The sun gear 31 has a connecting shaft 311 coaxially arranged with the input shaft 22, and the connecting shaft 311 is fixedly connected to the sixth gear 206. The planet gears 32 mesh with the sun gear 31 and the external gear ring 33 respectively. The planet carrier supporting the planet gears 32 is connected to the output shaft 42. The external gear ring 33 is loosely fitted on the output shaft 42. The fourth gear shifter 35 and the brake 34 can engage or disengage with the external gear ring 33 respectively. The brake 34 can be a brake used to lock the external gear ring 33.

[0065] Specifically, in this embodiment, such as Figure 1 As shown, the fourth gear shifter 35 is fixedly mounted on the output shaft 42; when the third component 30 is in the first gear position, as... Figure 5As shown, brake 34 engages with external gear ring 33, fourth gear shifter 35 disengages from external gear ring 33, and brake 34 locks external gear ring 33, so that the power supplied by the second component 20 is sequentially transmitted to the output shaft 42 via sun gear 31 and planet gear 32; when the third component 30 is in the second gear position, as Figure 6 As shown, the fourth gear shifter 35 engages with the external gear ring 33, and the brake 34 disengages from the external gear ring 33, so that the power supplied by the second component 20 is transmitted sequentially through the sun gear 31, planet gear 32, external gear ring 33 and the fourth gear shifter 35 to the output shaft 42.

[0066] In a preferred embodiment, the first gear shifter 24 and the fourth gear shifter 35 are clutches, wherein the fourth gear shifter 35 is preferably a wet clutch, and the third gear shifter 26 and the third gear shifter 26 are synchronizers.

[0067] In this embodiment, as Figure 1 As shown, the first component 10 also includes a torsional damper 50 disposed between the engine shaft 111 and the input shaft 22; the torsional damper 50 is connected to the flywheel 60. The torsional damper 50 is provided so that the power output by the engine 11 is transmitted to the input shaft 22 via the torsional damper 50, thereby reducing the torsional stiffness of the joint between the engine shaft 111 and the input shaft 22 and alleviating the torsional impact load on the input shaft 22 under unsteady conditions.

[0068] Furthermore, in this embodiment, such as Figure 1 As shown, both the second component 20 and the third component 30 are transmission devices. The components of the second component 20, excluding the generator 21, form the main transmission device, and the third component 30 is the auxiliary transmission device. The multi-gear electromechanical hybrid system also includes a clutch 70 located at one end of the input shaft 22 near the engine 11. The clutch 70 can be a clutch, used to control the engagement or disengagement of the first component 10 and the second component 20 to control the power transmission between the engine 11 and the transmission device.

[0069] The hybrid system of this invention can achieve the following driving modes, ensuring that the engine 11, generator 21, and drive motor 41 can all achieve optimal efficiency during vehicle driving. Specific operating conditions are as follows:

[0070] Operating condition 1: Only engine 11 is driven, generator 21 and drive motor 41 are not working;

[0071] Operating Condition 2: The first gear shifter 24 is engaged, while the second gear shifter 25 and the third gear shifter 26 are disengaged. The drive motor 41 outputs power to achieve pure electric drive of the vehicle. At the same time, the engine 11 can charge the generator 21.

[0072] Operating Condition 3: Engine 11, generator 21 and drive motor 41 are all working. Engine 11 and drive motor 41 output power simultaneously to achieve maximum driving force for the vehicle; at the same time, engine 11 can charge generator 21.

[0073] Condition 4: During vehicle braking or long downhill driving, neither the engine 11 nor the drive motor 41 is working. The first gear shifter 24 and the third gear shifter 26 are in the off state, and the second gear shifter 25 is in the engagement state with the seventh gear 207. The braking force is transmitted to the generator 21 to realize the recovery and charging of braking capacity.

[0074] The multi-gear electromechanical hybrid system of the present invention employs power coupling between an engine and a drive motor. Three-gear adjustment is achieved by controlling the engagement or disengagement of the three gear switching components in the second component, and this is combined with the two-gear adjustment of the planetary gear mechanism to achieve a six-gear adjustment function. It has the advantages of multiple gears, simple structure, and high power and fuel economy of the vehicle. While ensuring power and economy, it reduces vehicle emissions and meets environmental protection requirements.

[0075] A second aspect of the present invention provides a vehicle including the above-described multi-speed electromechanical hybrid system, thus having all the beneficial effects of a multi-speed electromechanical hybrid system, which will not be elaborated here.

[0076] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A multi-speed electromechanical hybrid power system, characterized in that, It includes the first component, the second component, the third component, and the fourth component; The first component includes an engine having an engine shaft, and the first component, the second component, the third component, and the fourth component are arranged sequentially along the extension direction of the engine shaft; The second component includes a generator, an input shaft, and an intermediate shaft. The generator has a generator shaft with a first gear shifter. The input shaft is coaxial with the engine shaft and has a second gear shifter. The intermediate shaft has a third gear shifter. Three-gear adjustment is achieved by controlling the first, second, and third gear shifters to be in different engaged or disengaged states. The generator shaft, input shaft, and intermediate shaft are arranged parallel to each other and spaced apart, and their extension direction is the same as that of the engine shaft. The third component includes a planetary gear set mechanism, a braking component, and a fourth gear shifter. The braking component and the fourth gear shifter can be engaged or disengaged from the planetary gear set mechanism, respectively, to achieve two-gear adjustment. The fourth component includes a drive motor and an output shaft. The output shaft and the input shaft are coaxially arranged. The output shaft is connected to the planetary gear mechanism. The drive motor can transmit power to the output shaft. A gear set, connected to the second component, transmits power output from the engine to the gear set via the input shaft; the gear set includes a first gear and a second gear mounted on the generator shaft, a third gear, a fourth gear, a fifth gear, and a sixth gear mounted on the input shaft, and a seventh gear, an eighth gear, and a ninth gear mounted on the intermediate shaft; the first gear, the fourth gear, the sixth gear, the seventh gear, and the eighth gear are loosely fitted, the second gear is fixedly mounted on the generator shaft, the third gear and the fifth gear are both fixedly mounted on the input shaft, and the ninth gear is fixedly mounted on the intermediate shaft; The first gear and the third gear mesh to form a first gear pair; the fourth gear meshes with the second gear and the seventh gear to form a second gear pair; the fifth gear and the eighth gear mesh to form a third gear pair; and the sixth gear and the ninth gear mesh to form a fourth gear pair. The first gear shifting component is fixedly connected to the second gear and can engage or disengage from the first gear. The second gear shifter is fixedly connected to the input shaft, and the sixth gear is fixedly connected to the planetary gear mechanism. The engagement or disengagement of the second gear shifter with the sixth gear realizes the connection or disengagement of the second component and the third component. The third gear shifting component is fixedly connected to the intermediate shaft. The third gear shifting component has a first shifting part and a second shifting part. The first shifting part can engage or disengage with the seventh gear, and the second shifting part can engage or disengage with the eighth gear. Also includes: A transmission assembly is connected to the fourth assembly; the drive motor has a drive motor shaft, and the transmission assembly is disposed between the drive motor shaft and the output shaft. The transmission assembly includes a tenth gear and an eleventh gear that are meshed together. The tenth gear is fixedly mounted on the output shaft, and the eleventh gear is fixedly mounted on the drive motor shaft.

2. The multi-speed electromechanical hybrid power system according to claim 1, characterized in that, The planetary gear mechanism includes a sun gear, planet gears, and an external gear ring. The sun gear has a connecting shaft coaxially arranged with the input shaft, and the connecting shaft is fixedly connected to the sixth gear. The planet gears mesh with the sun gear and the external gear ring respectively. The planet carrier supporting the planet gears is connected to the output shaft, and the external gear ring is loosely fitted on the output shaft. The fourth gear shifter and the brake can engage or disengage with the external gear ring, respectively.

3. The multi-speed electromechanical hybrid power system according to claim 2, characterized in that, The fourth gear shifter is fixedly mounted on the output shaft; When the fourth gear shifter engages with the external gear ring, the brake component disengages from the external gear ring; when the brake component engages with the external gear ring, the fourth gear shifter disengages from the external gear ring.

4. The multi-speed electromechanical hybrid power system according to claim 1, characterized in that, The first gear shifter and the fourth gear shifter are clutches, and the second gear shifter and the third gear shifter are synchronizers.

5. The multi-speed electromechanical hybrid power system according to claim 1, characterized in that, The first component also includes: A torsional damper is disposed between the engine shaft and the input shaft; A flywheel is provided at the end of the engine shaft, and the torsional damper is connected to the flywheel.

6. The multi-speed electromechanical hybrid power system according to claim 1, characterized in that, Also includes: A clutch element, disposed at one end of the input shaft near the engine, is used to control the engagement or disengagement of the first component and the second component.

7. A vehicle, characterized in that, The multi-speed electromechanical hybrid power system includes any one of claims 1 to 6.

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