Power system and vehicle

Abstract

The invention provides a power system and a vehicle, and belongs to the technical field of vehicles. The power system comprises a first motor, a first planetary gear train, a second planetary gear train, a first output shaft and a second output shaft. The first planetary gear train comprises a first sun gear, a first planet gear, a first planet carrier and a first gear ring connected with the first output shaft. The first motor and the first sun gear are connected and both annularly sleeve the first output shaft. The second planetary gear train comprises a second sun gear, a second planet gear, a third planet gear, a second gear ring fixed to the transmission box body and a second planet carrier rotationally connected with the second planet gear and the third planet gear and connected with the second output shaft, wherein the second sun gear, the second planet gear and the third planet gear are sequentially meshed. And the second sun gear sleeves the first output shaft and is coaxially connected with the first gear ring. The first motor drives the first output shaft and the second output shaft through the first planetary gear train and the second planetary gear train respectively. A differential mechanism does not need to be arranged between the first output shaft and the second output shaft, and the size of the power system is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and in particular to a power system and a vehicle. Background Technology

[0002] The powertrain is a core component of a vehicle, used to drive the vehicle.

[0003] However, the powertrain systems in these technologies are relatively large, which is not conducive to their placement in vehicles. Therefore, reducing the size of the powertrain is a key issue that needs to be addressed. Summary of the Invention

[0004] This disclosure provides a power system and a vehicle that can solve the technical problems existing in the related art. The technical solutions of the power system and the vehicle are as follows.

[0005] In a first aspect, this disclosure provides a power system, which includes a first motor, a first planetary gear train, a second planetary gear train, a first output shaft, and a second output shaft; The first planetary gear train includes a first sun gear, a first planet gear, a first planet carrier, and a first ring gear. The first motor shaft of the first motor is a hollow shaft. The first motor shaft is connected to the first sun gear. The first motor shaft and the first sun gear are ring-fitted around the first output shaft. The first planet gear meshes with the first sun gear and the first ring gear. The first planet carrier is rotatably connected to the first planet gear. The first planet carrier is connected to the first output shaft. The first ring gear is ring-fitted around the first output shaft. The second planetary gear train includes a second sun gear, a second planet gear, a third planet gear, a second planet carrier, and a second ring gear. The second sun gear is wrapped around the first output shaft and coaxially connected to the first ring gear. The second planet gear meshes with the second sun gear. The third planet gear meshes with the second planet gear and the second ring gear. The second ring gear is fixed to the transmission housing. The second planet carrier is rotatably connected to the second planet gear and the third planet gear. The second planet carrier is connected to the second output shaft.

[0006] In one possible implementation, the power system further includes a differential lock mechanism; The two ends of the differential lock mechanism are respectively connected to the first planetary carrier and the second planetary carrier. When the differential lock mechanism is engaged, the first planetary carrier and the second planetary carrier are connected. When the differential lock mechanism is disengaged, the first planetary carrier and the second planetary carrier are disconnected.

[0007] In one possible implementation, the power system further includes a second electric motor, an engine, and transmission gears; The second motor and the engine are both connected to the transmission gear. The outer side of the first gear ring has an outer gear ring, and the transmission gear meshes with the outer gear ring.

[0008] In one possible implementation, the power system further includes a first clutch, a second clutch, and a connecting shaft; The connecting shaft is connected to the engine drive, the second motor shaft of the second motor is a hollow shaft, the second motor shaft surrounds the connecting shaft, the first clutch is connected to one end of the second motor shaft and the drive gear, and the second clutch is connected to the other end of the second motor shaft and the connecting shaft; When the first clutch is engaged, the second motor shaft and the transmission gear are connected in a driving connection; when the second clutch is engaged, the second motor shaft and the connecting shaft are connected in a driving connection.

[0009] In one possible implementation, the power system further includes a vibration damper; The shock absorber is connected to the engine and the connecting shaft via a transmission.

[0010] In one possible implementation, the power system includes a single-motor drive mode and a dual-motor drive mode; In the single-motor drive mode, the first motor is working, and the second motor is not working; In the dual-motor drive mode, both the first motor and the second motor are working, and the first clutch is engaged.

[0011] In one possible implementation, the first gear ring includes an outer gear ring, an inner gear ring, and a third clutch; The internal gear ring is fixed to the transmission housing and meshes with the first planetary gear. The external gear ring is wrapped around the internal gear ring and is coaxially connected with the second sun gear. The third clutch is connected to the external gear ring, the internal gear ring, and the transmission housing.

[0012] In one possible implementation, the power system has a parallel drive mode and a series drive mode; In the parallel drive mode, the first motor, the second motor, and the engine are working, the first clutch and the second clutch are engaged, and the third clutch engages the outer gear ring and the inner gear ring. In the series drive mode, the first motor, the second motor, and the engine operate, the first clutch disengages, the second clutch engages, and the third clutch engages the outer gear ring and the inner gear ring.

[0013] In one possible implementation, the powertrain includes a dual-motor torque vector drive mode and a hybrid torque vector drive mode; In the dual-motor torque vector drive mode, the first motor and the second motor operate, the first clutch engages, the second clutch disengages, and the third clutch engages the internal gear ring and the transmission housing. In the hybrid torque vector drive mode, the first motor, the second motor, and the engine operate, the first clutch and the second clutch engage, and the third clutch engages the internal gear ring and the transmission housing.

[0014] In a second aspect, this disclosure provides a vehicle that includes a power system as described in any of the first aspects.

[0015] The technical solution provided in this disclosure includes at least the following beneficial effects: This disclosure provides a power system in which, when the first motor is operating, the first motor shaft a drives the first sun gear to rotate, which in turn drives the first planet carrier and the first ring gear to rotate via the first planet gears. The first planet carrier is connected to the first output shaft, thereby driving the first output shaft to rotate. The first ring gear drives the second output shaft to rotate via the second sun gear, the second planet gear, the third planet gear, and the second planet carrier. When the vehicle turns, the first planet gear train and the second planet gear train can automatically adjust the speed distribution, thereby making the speeds of the first output shaft and the second output shaft different. In this way, the differential speed between the first output shaft and the second output shaft can be achieved without the need for an additional differential, which helps to reduce the size of the power system.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings: Figure 1 This is a schematic diagram of the structure of a power system shown in an embodiment of this disclosure; Figure 2 This is a schematic diagram of power transmission in a power system when the differential lock mechanism is disengaged, as shown in an embodiment of this disclosure; Figure 3 This is a schematic diagram of power transmission in a power system when the differential lock mechanism is engaged, as shown in an embodiment of this disclosure; Figure 4 This is a schematic diagram of another power system structure shown in an embodiment of this disclosure; Figure 5This is a schematic diagram of power transmission in a single-motor drive mode for another power system shown in an embodiment of this disclosure; Figure 6 This is a schematic diagram of power transmission in a dual-motor drive mode of another power system shown in an embodiment of this disclosure; Figure 7 This is a schematic diagram of the structure of another power system shown in an embodiment of this disclosure; Figure 8 This is a schematic diagram of power transmission in parallel drive mode of another power system shown in the embodiments of this disclosure; Figure 9 This is a schematic diagram of power transmission in a series drive mode for another power system shown in an embodiment of this disclosure; Figure 10 This is a schematic diagram of power transmission in a dual-motor torque vector drive mode, as shown in another embodiment of the present disclosure. Figure 11 This is a schematic diagram of power transmission in a hybrid torque vector drive mode, as shown in another embodiment of the present disclosure.

[0018] Legend: 1. First planetary gear train; 11. First sun gear; 12. First planet gear; 13. First planet carrier; 14. First gear ring; 141. External gear ring; 142. Internal gear ring; 143. Third clutch. 2. Second planetary gear train; 21. Second sun gear; 22. Second planetary gear; 23. Third planetary gear; 24. Second planetary carrier; 25. Second gear ring. 3. First output shaft; 4. Second output shaft; 5. Differential lock mechanism; 6. Transmission gears; 7. First clutch; 8. Second clutch; 9. Connecting shaft; 100, First motor; 100a, First motor shaft; 200, Second motor; 200a, Second motor shaft; 300. Engine; 400. Vibration damper.

[0019] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0021] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0022] This disclosure provides a power system, such as Figure 1 As shown, the power system includes a first motor 100, a first planetary gear train 1, a second planetary gear train 2, a first output shaft 3, and a second output shaft 4. The first planetary gear train 1 includes a first sun gear 11, first planet gears 12, a first planet carrier 13, and a first ring gear 14. The first motor shaft 100a of the first motor 100 is a hollow shaft, connected to the first sun gear 11, and the first motor shaft 100a and the first sun gear 11 are ringed around the first output shaft 3. The first planet gear 12 meshes with the first sun gear 11 and the first ring gear 14. The first planet carrier 13 is rotatably connected to the first planet gear 12 and connected to the first output shaft 3. The first ring gear 14 is ringed around the first output shaft 3. The second planetary gear train 2 includes a second sun gear 21, a second planet gear 22, a third planet gear 23, a second planet carrier 24, and a second ring gear 25. The second sun gear 21 is ringed around the first output shaft 3 and coaxially connected to the first ring gear 14. The second planetary gear 22 meshes with the second sun gear 21, the third planetary gear 23 meshes with the second planetary gear 22 and the second ring gear 25, the second ring gear 25 is fixed to the gearbox housing, the second planetary carrier 24 is rotatably connected to the second planetary gear 22 and the third planetary gear 23, and the second planetary carrier 24 is connected to the second output shaft 4.

[0023] The second planetary gear train 2 has a second planetary gear 22 and a third planetary gear 23, thus enabling two-stage reduction. This results in a larger reduction ratio for the second planetary gear train 2 without making its size excessive. This is beneficial for achieving a high reduction ratio in a relatively compact space within the power system.

[0024] The technical solution provided in this embodiment describes a system where, when the first motor 100 operates, its shaft 100a drives the first sun gear 11 to rotate, which in turn drives the first planet carrier 13 and the first ring gear 14 to rotate via the first planet gear 12. The first planet carrier 13 is connected to the first output shaft 3, thereby driving the first output shaft 3 to rotate. The first ring gear 14 drives the second output shaft 4 to rotate via the second sun gear 21, the second planet gear 22, the third planet gear 23, and the second planet carrier 24. When the vehicle turns, the first planetary gear train 1 and the second planetary gear train 2 can automatically adjust the speed distribution, resulting in different speeds for the first output shaft 3 and the second output shaft 4. This eliminates the need for an additional differential between the first output shaft 3 and the second output shaft 4, thus reducing the size of the powertrain.

[0025] In some examples, such as Figure 2 and Figure 3 As shown, the power system also includes a differential lock mechanism 5. The two ends of the differential lock mechanism 5 are connected to the first planetary carrier 13 and the second planetary carrier 24, respectively. When the differential lock mechanism 5 is engaged, the first planetary carrier 13 and the second planetary carrier 24 are connected. When the differential lock mechanism 5 is disengaged, the first planetary carrier 13 and the second planetary carrier 24 are disconnected.

[0026] like Figure 2 As shown, when the differential lock mechanism 5 disengages, disconnecting the connection between the first output shaft 3 and the second output shaft 4, the first motor shaft 100a drives the first sun gear 11 to rotate, which in turn drives the first planet carrier 13 and the first ring gear 14 to rotate via the first planet gear 12. The first planet carrier 13 is connected to the first output shaft 3, thereby driving the first output shaft 3 to rotate. The first ring gear 14 drives the second output shaft 4 to rotate via the second sun gear 21, the second planet gear 22, the third planet gear 23, and the second planet carrier 24. When the vehicle turns, the first planetary gear train 1 and the second planetary gear train 2 can automatically adjust the speed distribution, resulting in different speeds for the first output shaft 3 and the second output shaft 4.

[0027] like Figure 3As shown, when the differential lock mechanism 5 is engaged, connecting the first output shaft 3 and the second output shaft 4, the first motor shaft 100a drives the first sun gear 11 to rotate, which in turn drives the first planet carrier 13 and the first ring gear 14 to rotate via the first planet gear 12. The first planet carrier 13 drives the first output shaft 3 to rotate, and the first planet carrier 13 drives the second planet carrier 24 to rotate via the differential lock mechanism 5. Simultaneously, the first ring gear 14 drives the second planet carrier 24 to rotate via the second sun gear 21, the second planet gear 22, and the third planet gear 23. Under the combined drive of the first planet carrier 13 and the third planet gear 23, the second planet carrier 24 drives the second output shaft 4 to rotate. In this way, the first output shaft 3 and the second output shaft 4 are connected, thereby making the rotational speeds of the first output shaft 3 and the second output shaft 4 the same. When the vehicle is driving on a relatively slippery road surface, or when one of the vehicle's wheels is stuck in a mud pit, engaging the differential lock mechanism 5 can prevent the single wheel of the vehicle from slipping and facilitate the vehicle's extrication from the predicament.

[0028] The aforementioned powertrain system can be applied to pure electric vehicles. In related technologies, the drive system of pure electric vehicles has a smaller Y-axis (lateral) dimension, requiring a narrower front longitudinal beam spacing. This narrower spacing also provides more Y-axis space for the chassis suspension system, making it easier to install suspension systems with higher dynamic performance and comfort, such as double wishbone suspension and air suspension. However, the drive system of hybrid vehicles often cannot be integrated into pure electric vehicle platforms due to its larger Y-axis dimension, requiring a dedicated hybrid vehicle platform. This increases the overall development workload, development costs, cycle time, and unit cost, and also limits the scalability of hybrid vehicles in adopting more advanced suspension systems. Furthermore, typical passenger car hybrid front-wheel drive systems generally have two motors: a main motor primarily responsible for driving, and an auxiliary motor primarily responsible for generating electricity, with limited driving involvement. This system has low utilization of the auxiliary motor and cannot improve electric drive efficiency through auxiliary motor assistance. Further, to achieve distributed drive, two more drive motors are needed, resulting in a total system requiring three motors, which is costly, large in size, and difficult to arrange.

[0029] In view of the above-mentioned technical problems, in some examples, in order to enable the power system provided by the embodiments of this disclosure to also be applied to hybrid vehicles, such as... Figure 4As shown, the power system also includes a second motor 200, an engine 300, and a transmission gear 6. Both the second motor 200 and the engine 300 are connected to the transmission gear 6. The outer side of the first gear ring 14 has an outer gear ring 141, which meshes with the transmission gear 6. The engine 300 and the second motor 200 can drive the transmission gear 6 to rotate. The transmission gear 6 drives the first gear ring 14 to rotate via the outer gear ring 141, and then drives the first output shaft 3 and the second output shaft 4 to rotate via the first planetary gear train 1 and the second planetary gear train 2. In this way, the power systems used in pure electric vehicles and hybrid vehicles can share some components, saving development effort and cost for hybrid vehicle power systems. Furthermore, it also allows for a smaller system size in hybrid vehicles.

[0030] In some examples, such as Figure 4 As shown, the power system also includes a first clutch 7, a second clutch 8, and a connecting shaft 9. The connecting shaft 9 is connected to the engine 300. The second motor shaft 200a of the second motor 200 is a hollow shaft that surrounds the connecting shaft 9. The first clutch 7 is connected to one end of the second motor shaft 200a and the transmission gear 6, and the second clutch 8 is connected to the other end of the second motor shaft 200a and the connecting shaft 9. When the first clutch 7 is engaged, the second motor shaft 200a and the transmission gear 6 are connected; when the second clutch 8 is engaged, the second motor shaft 200a and the connecting shaft 9 are connected.

[0031] In this way, by controlling the engagement and disengagement of the first clutch 7, it is possible to control whether the second motor 200 drives the first output shaft 3 and the second output shaft 4, and by controlling the engagement and disengagement of the second clutch 8, it is possible to control whether the engine 300 and the second motor 200 are connected in transmission. This facilitates the realization of multiple driving modes in the power system.

[0032] In some examples, such as Figure 4 As shown, the powertrain also includes a shock absorber 400, which is connected to the engine 300 and the connecting shaft 9. The shock absorber 400 effectively suppresses the crankshaft torsional vibration of the engine 300, preventing powertrain resonance and excessive impact loads, and avoiding component wear or damage caused by long-term vibration. Furthermore, the shock absorber 400 can reduce NVH (Noise, Vibration and Harshness) performance by isolating the vibration of the engine 300 from the vehicle body, thus improving cabin comfort.

[0033] In some examples, the powertrain includes single-motor drive mode and dual-motor drive mode.

[0034] like Figure 5As shown, in single-motor drive mode, the first motor 100 is operational, while the second motor 200 is inactive. At this time, neither the first clutch 7 nor the second clutch 8 is engaged, and the first output shaft 3 and the second output shaft 4 are driven to rotate by the first motor 100. The single-motor drive mode is the same as the drive mode described earlier when the power system does not include the first motor 100 and the second motor 200, and will not be elaborated upon here.

[0035] like Figure 6 As shown, in the dual-motor drive mode, both the first motor 100 and the second motor 200 operate, and the first clutch 7 is engaged. Part of the power from the first motor 100 is transmitted to the first output shaft 3 via the first sun gear 11, the first planetary gears 12, and the first planetary carrier 13; the other part of the power is transmitted to the first ring gear 14 via the first sun gear 11 and the first planetary gears 12. Part of the power from the second motor 200 is transmitted to the first output shaft 3 via the second motor shaft 200a, the transmission gear 6, the external ring gear 141, the first ring gear 14, the first planetary gears 12, and the first planetary carrier 13; the other part of the power is transmitted to the second output shaft 4 via the second motor shaft 200a, the transmission gear 6, the external ring gear 141, the first ring gear 14, and the second planetary gear train 2. Thus, the first output shaft 3 and the second output shaft 4 can rotate under the combined drive of the first motor 100 and the second motor 200, thereby giving the vehicle greater power.

[0036] To enable the powertrain to achieve more drive modes, in some examples, such as Figure 7 As shown, the first gear ring 14 includes an outer gear ring 141, an inner gear ring 142, and a third clutch 143. The inner gear ring 142 is fixed to the transmission housing and meshes with the first planetary gear 12. The outer gear ring 141 surrounds the inner gear ring 142, and the outer gear ring 141 is coaxially connected to the second sun gear 21. The third clutch 143 is connected to the outer gear ring 141, the inner gear ring 142, and the transmission housing.

[0037] The third clutch 143 can switch between three states. In one state, the third clutch 143 connects the external gear ring 141 and the internal gear ring 142, and the power of the first motor 100 can be transmitted to the first output shaft 3 and the second output shaft 4 through the first planetary gear train 1 and the second planetary gear train 2. Furthermore, the power of the second motor 200 and the engine 300 can also be transmitted to the first output shaft 3 and the second output shaft 4 through the first planetary gear train 1 and the second planetary gear train 2, thereby enabling the first motor 100, the second motor 200, and the engine 300 to jointly drive the first output shaft 3 and the second output shaft 4 to rotate, while also achieving differential speed between the first output shaft 3 and the second output shaft 4.

[0038] In the second state, the third clutch 143 disconnects the external gear ring 141 and the internal gear ring 142. At this time, the internal gear ring 142 and the second sun gear 21 are disconnected, so the power of the first motor 100 can only be transmitted to the first output shaft 3 through the first planetary gear train 1, but cannot be transmitted to the second output shaft 4.

[0039] In the third state, the third clutch 143 disconnects the outer gear ring 141 and the inner gear ring 142, and connects the inner gear ring 142 to the transmission housing. At this time, the inner gear ring 142 remains stationary, so the power of the first motor 100 can only be transmitted to the first output shaft 3 through the first planetary gear train 1, and cannot be transmitted to the second output shaft 4. The power of the second motor 200 and the engine 300 is transmitted to the second planetary gear train 2 through the outer gear ring 141, thereby driving the second output shaft 4.

[0040] In this way, different driving modes can be achieved by controlling the position of the third clutch 143, thereby further enriching the driving modes of the power system.

[0041] In some examples, such as Figure 8 and Figure 9 As shown, the power system has parallel drive mode and series drive mode.

[0042] like Figure 8 As shown, in parallel drive mode, the first motor 100, the second motor 200 and the engine 300 are working, the first clutch 7 and the second clutch 8 are engaged, and the third clutch 143 engages the outer gear ring 141 and the inner gear ring 142.

[0043] The power of the first motor 100 is transmitted to the first output shaft 3 and the second output shaft 4 via the first planetary gear train 1 and the second planetary gear train 2. The power of the engine 300 is transmitted to the second motor 200 via the second clutch 8. The power of the second motor 200 and the engine 300 is transmitted to the transmission gear 6 via the first clutch 7, and then drives the first output shaft 3 and the second output shaft 4 via the first planetary gear train 1 and the second planetary gear train 2. In this way, the first motor 100, the second motor 200, and the engine 300 jointly drive the first output shaft 3 and the second output shaft 4.

[0044] like Figure 9As shown, in series drive mode, the first motor 100, the second motor 200, and the engine 300 operate. The first clutch 7 disengages, the second clutch 8 engages, and the third clutch 143 engages the external gear ring 141 and the internal gear ring 142. Power from the engine 300 is transmitted to the second motor 200 via the second clutch 8, thereby driving the second motor 200 to generate electricity. The second motor 200 then transmits electrical energy to the first motor 100, driving it to rotate. Power from the first motor 100 is transmitted to the first output shaft 3 and the second output shaft 4 via the first planetary gear train 1 and the second planetary gear train 2, thereby driving the first output shaft 3 and the second output shaft 4 to rotate. Series drive mode is suitable when the vehicle's battery is low, where the engine 300 drives the second motor 200 to generate electricity, which in turn drives the first motor 100.

[0045] In some examples, the powertrain includes a dual-motor torque vectoring drive mode and a hybrid torque vectoring drive mode.

[0046] like Figure 10 As shown, in the dual-motor torque vector drive mode, the first motor 100 and the second motor 200 operate, the first clutch 7 engages, the second clutch 8 disengages, and the third clutch 143 engages the internal gear ring 142 and the transmission housing, at which point the internal gear ring 142 remains stationary. The power of the first motor 100 is transmitted to the first output shaft 3 via the first sun gear 11, the first planetary gears 12, and the first planetary carrier 13. The power of the second motor 200 is transmitted to the second output shaft 4 via the first clutch 7, the transmission gear 6, the external gear ring 141, and the second planetary gear train 2. Figure 10 The solid arrows in the diagram represent the power transmission path of the first motor 100, and the dashed arrows represent the power transmission path of the second motor 200.

[0047] like Figure 11 As shown, in hybrid torque vector drive mode, the first motor 100, the second motor 200, and the engine 300 operate. The first clutch 7 and the second clutch 8 are engaged, and the third clutch 143 engages the internal gear ring 142 and the transmission housing. The power of the first motor 100 is transmitted to the first output shaft 3 through the first sun gear 11, the first planetary gears 12, and the first planetary carrier 13. The power of the engine 300 is transmitted to the second motor 200 through the second clutch 8. The power of the second motor 200 and the engine 300 is transmitted to the transmission gear 6 through the first clutch 7, and then drives the first output shaft 3 and the second output shaft 4 through the first planetary gear train 1 and the second planetary gear train 2. This achieves the joint drive of the first output shaft 3 and the second output shaft 4 by the first motor 100, the second motor 200, and the engine 300.

[0048] The powertrain system provided in this disclosure can realize a coaxial electric drive system with a simpler structure, improving power and torque density while reducing costs. This powertrain system can cover hybrid drive systems, allowing pure electric drive systems and hybrid drive systems to share some components. Furthermore, through a modular structure, the system maximizes the utilization of the two motors in the hybrid system, expanding the range of operating modes and enhancing the customer experience.

[0049] This disclosure also provides a vehicle that includes the aforementioned power system.

[0050] This disclosure does not specifically limit the type of vehicle, such as cars, buses, trucks, sport utility vehicles (SUVs), etc.

[0051] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A power system, characterized by, The power system comprises a first motor (100), a first planetary gear train (1), a second planetary gear train (2), a first output shaft (3) and a second output shaft (4); The first planetary gear train (1) comprises a first sun gear (11), a first planetary gear (12), a first planetary carrier (13) and a first ring gear (14), the first motor shaft (100a) of the first motor (100) is a hollow shaft, the first motor shaft (100a) is connected with the first sun gear (11), the first motor shaft (100a) and the first sun gear (11) are sleeved on the first output shaft (3), the first planetary gear (12) is engaged with the first sun gear (11) and the first ring gear (14), the first planetary carrier (13) is rotationally connected with the first planetary gear (12), the first planetary carrier (13) is connected with the first output shaft (3), and the first ring gear (14) is sleeved on the first output shaft (3); The second planetary gear train (2) comprises a second sun gear (21), a second planetary gear (22), a third planetary gear (23), a second planetary carrier (24) and a second ring gear (25), the second sun gear (21) is sleeved on the first output shaft (3) and coaxially connected with the first ring gear (14), the second planetary gear (22) is engaged with the second sun gear (21), the third planetary gear (23) is engaged with the second planetary gear (22) and the second ring gear (25), the second ring gear (25) is fixed to a transmission case, the second planetary carrier (24) is rotationally connected with the second planetary gear (22) and the third planetary gear (23), and the second planetary carrier (24) is connected with the second output shaft (4).

2. The power system of claim 1, wherein, The power system further comprises a differential lock mechanism (5); Two ends of the differential lock mechanism (5) are respectively connected with the first planetary carrier (13) and the second planetary carrier (24), when the differential lock mechanism (5) is combined, the first planetary carrier (13) and the second planetary carrier (24) are connected, and when the differential lock mechanism (5) is separated, the first planetary carrier (13) and the second planetary carrier (24) are disconnected.

3. The power system of claim 1, wherein, The power system further comprises a second motor (200), an engine (300) and a transmission gear (6); The second motor (200) and the engine (300) are in driving connection with the transmission gear (6), and the first ring gear (14) has an outer ring gear (141) on the outer side, and the transmission gear (6) is engaged with the outer ring gear.

4. The power system of claim 3, wherein, The power system further comprises a first clutch (7), a second clutch (8) and a connecting shaft (9); The connecting shaft (9) is in transmission connection with the engine (300), the second motor shaft (200a) of the second motor (200) is a hollow shaft, the second motor shaft (200a) surrounds the connecting shaft (9), the first clutch (7) is connected with one end of the second motor shaft (200a) and the transmission gear (6), and the second clutch (8) is connected with the other end of the second motor shaft (200a) and the connecting shaft (9); When the first clutch (7) is combined, the second motor shaft (200a) and the transmission gear (6) are in transmission connection, and when the second clutch (8) is combined, the second motor shaft (200a) and the connecting shaft (9) are in transmission connection.

5. The power system of claim 4, wherein, The power system further comprises a shock absorber (400); The shock absorber (400) is in transmission connection with the engine (300) and the connecting shaft (9).

6. The power system of claim 4, wherein, The power system comprises a single-motor driving mode and a double-motor driving mode; In the single-motor driving mode, the first motor (100) works, and the second motor (200) does not work. In the double-motor driving mode, the first motor (100) and the second motor (200) both work, and the first clutch (7) is combined.

7. The power system of claim 4, wherein, The first ring gear (14) comprises an outer ring gear (141), an inner ring gear (142) and a third clutch (143); The inner ring gear (142) is fixed to a transmission case, the inner ring gear (142) is in meshing connection with the first planetary gear (12), the outer ring gear (141) surrounds the inner ring gear (142), the outer ring gear (141) is coaxially connected with the second sun gear (21), and the third clutch (143) is connected with the outer ring gear (141), the inner ring gear (142) and the transmission case.

8. The power system of claim 7, wherein, The power system has a parallel driving mode and a series driving mode; In the parallel driving mode, the first motor (100), the second motor (200) and the engine (300) work, the first clutch (7) and the second clutch (8) are both combined, and the third clutch (143) combines the outer ring gear (141) and the inner ring gear (142); In the series driving mode, the first motor (100), the second motor (200) and the engine (300) work, the first clutch (7) is separated, the second clutch (8) is combined, and the third clutch (143) combines the outer ring gear (141) and the inner ring gear (142).

9. The power system of claim 7, wherein, The power system comprises a double-motor torque vector driving mode and a hybrid torque vector driving mode; In the double-motor torque vector driving mode, the first motor (100) and the second motor (200) work, the first clutch (7) is combined, the second clutch (8) is separated, and the third clutch (143) combines the inner ring gear (142) and the transmission case. In the hybrid torque vectoring driving mode, the first motor (100), the second motor (200) and the engine (300) work, the first clutch (7) and the second clutch (8) are combined, and the third clutch (143) combines the inner ring gear (142) and the transmission case.

10. A vehicle characterized by comprising: The vehicle comprises a powertrain as claimed in any of claims 1-9.

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