Power drive system and vehicle
Patent Information
- Application Number
- CN202611442158.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-17
- Publication Date
- 2026-10-27
AI Technical Summary
[0003]然而，此种布置方式会增大动力驱动系统沿发动机轴向的安装尺寸，轴向占用空间大，不利于动力驱动系统在整车内部的布置安装
[0017]本申请提供的技术方案带来的有益效果至少包括：本申请的第一齿轮组、第二齿轮组以及第三齿轮组沿径向相互啮合，能够实现对车辆的三挡调节。多个齿轮组无需沿发动机输出轴的轴向依次排布，在实现多组不同传动比组合、满足多挡位动力调节功能的基础上，大幅缩短了动力驱动系统的轴向整体尺寸，显著减小轴向占用空间，优化了动力系统的整车布置适配性。
Smart Images
Figure CN122976296A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle technology, and in particular to a power drive system and vehicle. Background Technology
[0002] In a vehicle's power drive system, to achieve multi-gear power output, multiple gear sets with different transmission ratios are usually arranged sequentially along the axial direction of the engine's output shaft to complete the vehicle's multi-gear speed regulation.
[0003] However, this arrangement increases the installation dimensions of the power drive system along the engine axis, resulting in a large axial space occupation, which is not conducive to the layout and installation of the power drive system inside the vehicle. Summary of the Invention
[0004] This application provides a power drive system and vehicle that can reduce the space occupied by the power drive system in the axial direction of the engine. The technical solution is as follows: On the one hand, this application provides a power drive system, including: a first gear set, a second gear set, a third gear set, and an engine; The first gear set, the second gear set, and the third gear set each include a first gear, a second gear, and a first clutch, with the first gear and the second gear connected via the first clutch; The first gear in the second gear set meshes with the first gear in the first gear set and the first gear in the third gear set, respectively; the second gear in the second gear set meshes with the second gear in the first gear set and the second gear in the third gear set, respectively. The first gear in the second gear set is connected to the engine for transmission, and the second gear in the third gear set is used for transmission connection with the wheels.
[0005] In some possible implementations, for any one of the first gear set, the second gear set, and the third gear set, the first gear and the second gear in the gear set are coaxially arranged, and the first clutch is located between the first gear and the second gear.
[0006] In some possible implementations, the axial directions of the first gear set, the second gear set, and the third gear set are parallel to each other; And / or, the first gear set, the second gear set, and the third gear set are arranged along a first direction, which is perpendicular to the output shaft of the engine.
[0007] In some possible implementations, the power drive system further includes: a first half-shaft, a second half-shaft, a first output planetary gear set, and a second output planetary gear set; The first output planetary gear set and the second output planetary gear set are connected by a transmission, and the first output planetary gear set is connected by a transmission to the second gear in the third gear set; The first half-shaft and the second half-shaft are spaced apart along the first axis direction. The two ends of the first half-shaft and the second half-shaft that are close to each other are respectively connected to the first output planetary gear set and the second output planetary gear set. The two ends of the first half-shaft and the second half-shaft that are opposite to each other are respectively used to connect two different wheels. The first axis direction is the axis direction of the first half-shaft and the second half-shaft.
[0008] In some possible implementations, the power drive system further includes a housing; The ring gear in the first output planetary set is fixedly connected to the ring gear in the second output planetary set, the sun gear in the first output planetary set is fixedly connected to the second gear in the third gear set, and the planet carrier of the first output planetary set is fixedly connected to the end of the first half-shaft away from the wheel. The sun gear in the second output planetary set is fixedly connected to the end of the second half-shaft away from the wheel, and the planet carrier in the second output planetary set is fixedly connected to the outer casing.
[0009] In some possible implementations, the planet gears of the second output planetary gear set include a first sub-planet gear and a second sub-planet gear coaxially connected. The first sub-planet gear is located on the inner circumference of the gear ring of the second output planetary gear set and meshes with the gear ring of the second output planetary gear set. The second sub-planet gear is located on the outer circumference of the sun gear of the second output planetary gear set and meshes with the sun gear of the second output planetary gear set.
[0010] In some possible implementations, the power drive system further includes: a first input planetary gear set and a first motor; the planet carrier of the first input planetary gear set is fixedly connected to the output shaft of the engine, the sun gear of the first input planetary gear set is fixedly connected to the rotor of the first motor, and the ring gear of the first input planetary gear set is fixedly connected to the first gear in the first gear set.
[0011] In some possible implementations, the power drive system further includes: a first drive shaft, a second drive shaft, a second clutch, and a second motor; The first drive shaft and the second drive shaft are coaxially arranged and connected by the second clutch. The first drive shaft is fixedly connected to the first gear of the second gear set, and the second drive shaft is connected to the second motor for transmission.
[0012] In some possible implementations, the power drive system further includes a second input planetary gear set, the sun gear of which is fixedly connected to the rotor of the second motor, and the planet carrier of which is fixedly connected to the second drive shaft. The power drive system further includes a housing and a first locking mechanism. The first locking mechanism is fixedly connected to the housing and engages with the gear ring of the second input planetary gear set. The first locking mechanism is used to connect the gear ring of the second input planetary gear set to the housing or disconnect the gear ring of the second input planetary gear set from the housing. And / or, the power drive system further includes a second locking mechanism, which is fixedly connected to the gear ring of the second input planetary set and cooperates with the planet carrier of the second input planetary set. The second locking mechanism is used to connect the gear ring of the second input planetary set to the planet carrier of the second input planetary set, or to disconnect the connection between the gear ring of the second input planetary set and the planet carrier of the second input planetary set.
[0013] In some possible implementations, the power drive system further includes a meshing third gear and a fourth gear, the fourth gear being fixedly connected to the second gear in the third gear set; The third gear is sleeved outside the second drive shaft and is fixedly connected to the sun gear of the second input planetary gear set; And / or, the third gear is fixedly connected to the second drive shaft.
[0014] In some possible implementations, the power drive system further includes: an output shaft, a first output gear, and a second output gear; the second gear and the first output gear in the third gear set are both sleeved and fixed on the output shaft, the second output gear meshes with the first output gear, and the second output gear is used for transmission connection with the wheel.
[0015] In some possible implementations, the engine is connected to the first gear in the second gear set; The power drive system includes a third motor and a transmission gear. The transmission gear is fixedly connected to the rotor of the third motor and meshes with the second gear in the third gear set. And / or, the power drive system includes a fourth motor, the rotor of which is fixedly connected to a first gear in the first gear set.
[0016] On the other hand, this application provides a vehicle that integrates a power drive system as described in any of the first aspects.
[0017] The beneficial effects of the technical solution provided in this application include at least the following: the first gear set, the second gear set, and the third gear set of this application mesh with each other radially, enabling three-speed adjustment of the vehicle. Multiple gear sets do not need to be arranged sequentially along the axial direction of the engine output shaft. While achieving multiple combinations of different transmission ratios and satisfying the multi-speed power adjustment function, this significantly shortens the overall axial dimension of the power drive system, substantially reduces the axial space occupied, and optimizes the vehicle layout adaptability of the power system. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the power drive system provided in the first embodiment of this application; Figure 2 This is a schematic diagram of the power drive system provided in the second embodiment of this application; Figure 3 This is a schematic diagram of the power drive system provided in the third embodiment of this application; Figure 4 This is a schematic diagram of the power drive system provided in the fourth embodiment of this application; Figure 5 This is a schematic diagram of the power drive system provided in the fifth embodiment of this application; Figure 6 This is a schematic diagram of the power drive system provided in the first embodiment of this application; Figure 7 This is a schematic diagram of the power drive system provided in the second embodiment of this application in electric first gear; Figure 8 This is a schematic diagram of the power drive system provided in the second embodiment of this application in the first gear of a continuously variable transmission; Figure 9 This is a schematic diagram of the power drive system provided in the second embodiment of this application in the second gear of the continuously variable transmission; Figure 10 This is a schematic diagram of the power drive system provided in the second embodiment of this application in the third gear of the continuously variable transmission; Figure 11 This is a schematic diagram of the power drive system provided in the second embodiment of this application in the fourth gear of the continuously variable transmission; Figure 12This is a schematic diagram of the power drive system provided in the second embodiment of this application in the fifth gear of the continuously variable transmission.
[0020] Figure label: 101. First gear; 102. Second gear; 103. Third gear; 104. Fourth gear; 105. First clutch; 110. First gear set; 120. Second gear set; 130. Third gear set; 210. Engine; 220. First motor; 230. Second motor; 240. Third motor; 241. Transmission gear; 250. Fourth motor; 310. First half-shaft; 311. First bushing; 320. Second half-shaft; 330. First output shaft Planetary gear set; 340, Second output planetary gear set; 341, First sub-planetary gear; 342, Second sub-planetary gear; 400, Housing; 510, First input planetary gear set; 520, Second input planetary gear set; 521, First locking mechanism; 522, Second locking mechanism; 610, First drive shaft; 620, Second drive shaft; 621, Second bushing; 630, Second clutch; 700, Wheel; 710, Output shaft; 720, First output gear; 730, Second output gear. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0022] In a vehicle's powertrain system, to achieve multi-gear power output, multiple gear sets with different transmission ratios are typically arranged sequentially along the engine's output shaft. Each gear set includes a meshing driving gear and a driven gear. The driving gear is connected to the engine's output shaft, and the driven gear is connected to the wheel drive. When shifting gears, the corresponding set of driving and driven gears is selected to establish power transmission, while the remaining gear sets disconnect power transmission, thereby changing the speed output to the wheels and achieving multi-gear speed regulation in the vehicle.
[0023] However, this arrangement increases the installation dimensions of the power drive system along the engine axis, resulting in a large axial space occupation, which is not conducive to the layout and installation of the power drive system inside the vehicle.
[0024] For this purpose, please refer to Figure 1This application provides a power drive system, including: a first gear set 110, a second gear set 120, a third gear set 130, and an engine 210; the first gear set 110, the second gear set 120, and the third gear set 130 each include a first gear 101, a second gear 102, and a first clutch 105, with the first gear 101 and the second gear 102 connected through the first clutch 105; thus, the first clutch 105 enables the first gear 101 and the second gear 102 in the same gear set to be connected or disconnected.
[0025] The first gear 101 in the second gear set 120 meshes with the first gear 101 in the first gear set 110 and the first gear 101 in the third gear set 130, respectively. The second gear 102 in the second gear set 120 meshes with the second gear 102 in the first gear set 110 and the second gear 102 in the third gear set 130, respectively. The first gear 101 in the second gear set 120 is connected to the engine 210 for transmission, and the second gear 102 in the third gear set 130 is used for transmission connection with the wheel 700.
[0026] During operation, the engine 210 inputs power to the first gear 101 of the second gear set 120. By controlling the engagement or disengagement of the first clutch 105 corresponding to each gear set, different power transmission paths can be switched. When the first clutch 105 of the corresponding gear set is engaged, the first gear 101 and the second gear 102 of that set are locked and rotate synchronously. Power can be transmitted through this gear set to the second gear 102 in the third gear set 130, which then drives the wheel 700 to rotate. When the first clutch 105 is disengaged, the first gear 101 and the second gear 102 of that set rotate freely and do not participate in power transmission.
[0027] For example, in the first gear: the first clutch 105 of the first gear set 110 is engaged, and the first clutches 105 of the second gear set 120 and the third gear set 130 are disengaged. The engine 210 drives the first gear 101 of the second gear set 120 to rotate; the first gear 101 of the second gear set 120 drives the first gear 101 of the first gear set 110 to rotate. Since the first clutch 105 of the first gear set 110 is engaged, the first gear 101 and the second gear 102 of the first gear set 110 rotate synchronously. The second gear 102 of the first gear set 110 drives the second gear 102 of the third gear set 130 to rotate through the second gear 102 in the second gear set 120, and transmits power to the wheels 700 through the second gear 102 in the third gear set 130.
[0028] In the second gear: the first clutch 105 of the second gear set 120 is engaged, and the first clutches 105 of the first gear set 110 and the third gear set 130 are disengaged. The engine 210 drives the first gear 101 of the second gear set 120 to rotate; due to the engagement of the first clutch 105 of the second gear set 120, the first gear 101 and the second gear 102 of the second gear set 120 rotate synchronously, and the second gear 102 of the second gear set 120 drives the second gear 102 in the third gear set 130, and transmits power to the wheels 700 through the second gear 102 in the third gear set 130.
[0029] In third gear: the first clutch 105 of the third gear set 130 is engaged, and the first clutches 105 of the first gear set 110 and the second gear set 120 are disengaged. The engine 210 drives the first gear 101 of the second gear set 120 to rotate; the first gear 101 of the second gear set 120 drives the first gear 101 of the third gear set 130 to rotate. Since the first clutch 105 of the third gear set 130 is engaged, the first gear 101 and the second gear 102 of the third gear set 130 rotate synchronously, and the second gear 102 in the third gear set 130 then transmits power to the wheels 700.
[0030] In this embodiment, the first gear set 110, the second gear set 120, and the third gear set 130 of this application mesh radially with each other, thereby enabling three-speed adjustment of the vehicle. Since multiple gear sets do not need to be arranged sequentially along the output shaft of the engine 210, this significantly shortens the overall axial dimension of the power drive system while achieving multiple combinations of different transmission ratios and satisfying multi-speed power adjustment functions, thus significantly reducing the axial space occupied and optimizing the vehicle layout adaptability of the power system.
[0031] Furthermore, this application does not specifically limit the number of gear sets. For example, a fourth gear set can also be provided, in which the first gear of the fourth gear set meshes with the first gear of the third gear set, and the second gear of the fourth gear set meshes with the second gear of the third gear set.
[0032] In some possible implementations, for any one of the first gear set 110, the second gear set 120 and the third gear set 130, the first gear 101 and the second gear 102 in the gear set are coaxially arranged, and the first clutch 105 is located between the first gear 101 and the second gear 102.
[0033] In this embodiment, for any one of the first gear set 110, the second gear set 120, and the third gear set 130, the first gear 101 and the second gear 102 are arranged coaxially, and the first clutch 105 is located between the first gear 101 and the second gear 102. This allows the first clutch 105 to directly engage or disengage the coaxially arranged first gear 101 and second gear 102. Power is transmitted along the same axis, resulting in a short transmission path and low transmission loss. Simultaneously, it facilitates the integrated arrangement of the first gear 101, the first clutch 105, and the second gear 102, leading to a compact structure and further reducing the axial space occupied by the entire power drive system. During gear shifting, the clutch engagement and disengagement responses are rapid, resulting in higher transmission reliability.
[0034] In some possible implementations, the axial directions of the first gear set 110, the second gear set 120, and the third gear set 130 are parallel to each other; and / or, the first gear set 110, the second gear set 120, and the third gear set 130 are arranged along a first direction, which is perpendicular to the output shaft of the engine 210.
[0035] In some embodiments, the axial directions of the first gear set 110, the second gear set 120, and the third gear set 130 are parallel to each other. The parallel axial directions of the first gear set 110, the second gear set 120, and the third gear set 130 ensure that the mounting reference direction of each gear set is unified, the meshing accuracy between gears is easily guaranteed, and the transmission operation is smooth.
[0036] In some other embodiments, the first gear set 110, the second gear set 120 and the third gear set 130 are arranged along a first direction perpendicular to the output shaft of the engine 210, so that multiple gear sets are arranged side by side in the radial direction, which facilitates the formation of radial meshing between the gear sets. The overall layout is compact and conducive to the arrangement and installation of the power drive system in the vehicle.
[0037] In other embodiments, the axial directions of the first gear set 110, the second gear set 120, and the third gear set 130 are parallel to each other, and the first gear set 110, the second gear set 120, and the third gear set 130 are arranged along a first direction perpendicular to the output shaft of the engine 210.
[0038] Of course, it is also possible that the axial directions of the first gear set, the second gear set, and the third gear set are parallel to each other, and the first gear set, the second gear set, and the third gear set are arranged in a V-shape.
[0039] See Figure 2The power drive system also includes: a first half-shaft 310, a second half-shaft 320, a first output planetary gear set 330, and a second output planetary gear set 340; the first output planetary gear set 330 and the second output planetary gear set 340 are connected in a transmission, and the first output planetary gear set 330 is connected in a transmission to the second gear 102 in the third gear set 130; the first half-shaft 310 and the second half-shaft 320 are spaced apart along a first axis direction, and the two ends of the first half-shaft 310 and the second half-shaft 320 that are close to each other are respectively connected in a transmission to the first output planetary gear set 330 and the second output planetary gear set 340, and the two ends of the first half-shaft 310 and the second half-shaft 320 that are opposite to each other are respectively used to connect two different wheels 700; the first axis direction is the axis direction of the first half-shaft 310 and the second half-shaft 320.
[0040] It should be noted that the first gear 101 and the second gear 102 of the second gear set 120 are connected by an input shaft, which is coaxial with the output shaft of the engine 210 and is used to input power.
[0041] In this embodiment, the first output planetary gear set 330 and the second output planetary gear set 340 cooperate to provide differential transmission to the first half-shaft 310 and the second half-shaft 320. This allows the two wheels 700 to rotate at the same speed when the vehicle is traveling straight, and to obtain different speeds when the vehicle is turning, thus meeting the differential speed requirements of the vehicle. Meanwhile, compared to related technologies that require separate input shafts, transition output shafts, and left and right half-shafts, the first output planetary gear set 330 of this application is connected to the second gear 102 in the third gear set 130 and to the wheels 700. That is, the first output planetary gear set 330 alone can achieve the transmission connection between the second gear 102 in the third gear set 130 and the wheels 700, eliminating the need for a transition output shaft for power transmission. Only the input shaft connected to the engine 210, and the first half-shaft 310 and second half-shaft 320 are retained, resulting in fewer components, a simplified transmission chain, and a simpler and more compact overall structure for the power drive system.
[0042] In some possible implementations, the power drive system also includes a housing 400; the ring gear in the first output planetary gear set 330 is fixedly connected to the ring gear in the second output planetary gear set 340, the sun gear in the first output planetary gear set 330 is fixedly connected to the second gear 102 in the third gear set 130, the planet carrier of the first output planetary gear set 330 is fixedly connected to the end of the first half-shaft 310 opposite to the wheel 700; the sun gear in the second output planetary gear set 340 is fixedly connected to the end of the second half-shaft 320 opposite to the wheel 700, and the planet carrier in the second output planetary gear set 340 is fixedly connected to the housing 400.
[0043] In this embodiment, the ring gear of the first output planetary gear set 330 and the ring gear of the second output planetary gear set 340 are fixed together. The planet carrier of the second output planetary gear set 340 is locked to the housing 400. Power is input from the sun gear of the first output planetary gear set 330 and output to the two half-shafts from the planet carrier of the first output planetary gear set 330 and the sun gear of the second output planetary gear set 340, respectively. The 70° differential function between the left and right wheels can be achieved by relying on the rotational coupling of the two sets of planetary gear sets, without the need for an additional traditional differential. The components are highly integrated, the transmission path is short, and the overall structure is compact.
[0044] Furthermore, the second gear 102 in the third gear set 130 and the sun gear in the first output planetary gear set 330 are connected by a first bushing 311. The first bushing 311 is fitted outside the first half-shaft 310 and can rotate relative to the first half-shaft 310. This nested arrangement eliminates the need for an additional independent transition output shaft, shortens and simplifies the power transmission chain, reduces assembly errors between components, and facilitates a compact internal structure arrangement of the drive system, saving installation space.
[0045] In some possible implementations, the planet gears of the second output planetary gear set 340 include a first sub-planet gear 341 and a second sub-planet gear 342 coaxially connected. The first sub-planet gear 341 is located on the inner circumference of the gear ring of the second output planetary gear set 340 and meshes with the gear ring of the second output planetary gear set 340. The second sub-planet gear 342 is located on the outer circumference of the sun gear of the second output planetary gear set 340 and meshes with the sun gear of the second output planetary gear set 340.
[0046] In this configuration, the planetary gears of the second output planetary gear set 340 adopt a double planetary gear structure with the first sub-planetary gear 341 and the second sub-planetary gear 342 coaxially fixed. The first sub-planetary gear 341 meshes with the ring gear, and the second sub-planetary gear 342 meshes with the sun gear. By matching the tooth count parameters of the first sub-planetary gear 341 and the second sub-planetary gear 342, the corresponding transmission relationship inside the second output planetary gear set 340 can be set, thereby cooperating with the first output planetary gear set 330 to achieve differential output of the two half-shafts. Compared with a conventional single planetary gear planetary gear set, the differential matching relationship can be adjusted without modifying the rest of the planetary gear set components. The scope of component modification is small, reducing the design and debugging difficulty of the differential transmission mechanism. The coaxial arrangement of the double planetary gears provides good transmission synchronization and high meshing transmission accuracy, which helps to ensure that the wheels on both sides rotate at the same speed of 700° when the vehicle is traveling straight and to form a stable speed difference when turning. The overall structure is compact.
[0047] In some possible implementations, the power drive system further includes: a first input planetary gear set 510 and a first motor 220; the planet carrier of the first input planetary gear set 510 is fixedly connected to the output shaft of the engine 210, the sun gear of the first input planetary gear set 510 is fixedly connected to the rotor of the first motor 220, and the ring gear of the first input planetary gear set 510 is fixedly connected to the first gear 101 in the first gear set 110.
[0048] In this way, the power coupling and speed decoupling between the engine 210 and the first motor 220 are achieved through the first input planetary gear set 510. Under different driving conditions, the first motor 220 can switch between multiple operating states: when the engine 210 has a large surplus power, part of the power output by the engine 210 can be transmitted to the first motor 220 through the first input planetary gear set 510 to drive the first motor 220 to generate electricity and charge the on-board energy storage components; when the vehicle needs additional power for acceleration or hill climbing, the first motor 220 can consume electrical energy to output driving force, and the power is superimposed on the power of the engine 210 through the first input planetary gear set 510, realizing joint driving of the engine 210 and the first motor 220; thus, the power output of the engine 210 and the first motor 220 can be flexibly allocated, which is conducive to keeping the engine 210 in the high-efficiency operating range for a long time and reducing the overall vehicle energy consumption.
[0049] In some possible implementations, the power drive system further includes: a first drive shaft 610, a second drive shaft 620, a second clutch 630, and a second motor 230; the first drive shaft 610 and the second drive shaft 620 are coaxially arranged and connected by the second clutch 630; the first drive shaft 610 is fixedly connected to the first gear 101 of the second gear set 120; and the second drive shaft 620 is drive-connected to the second motor 230.
[0050] In this embodiment, the first drive shaft 610 and the second drive shaft 620 are arranged coaxially, and the power path between them is engaged and disengaged through the second clutch 630. When the second clutch 630 is engaged, the power of the second motor 230 can be input to the second gear set 120, which couples with the power transmitted from the engine 210 side to achieve joint drive.
[0051] In some possible implementations, the power drive system further includes a second input planetary gear set 520, the sun gear of which is fixedly connected to the rotor of the second motor 230, and the planet carrier of which is fixedly connected to the second drive shaft 620. The power drive system also includes a housing 400 and a first locking mechanism 521, which is fixedly connected to the housing 400 and engages with the ring gear of the second input planetary gear set 520. The first locking mechanism 521 is used to lock the ring gear of the second input planetary gear set 520 to the housing 400. The connection between the gear ring of the second input planetary gear set 520 and the housing 400 can be made or disconnected; and / or, the power drive system further includes a second locking mechanism 522, which is fixedly connected to the gear ring of the second input planetary gear set 520 and cooperates with the planet carrier of the second input planetary gear set 520. The second locking mechanism 522 is used to connect the gear ring of the second input planetary gear set 520 to the planet carrier of the second input planetary gear set 520, or disconnect the connection between the gear ring of the second input planetary gear set 520 and the planet carrier of the second input planetary gear set 520.
[0052] In this way, selectively locking the ring gear or the planet carrier of the second input planetary gear set 520 can increase the number of gears in the power drive system to adapt to different operating conditions.
[0053] In other embodiments, see Figure 3 and Figure 5 The power drive system also includes a second input planetary gear set 520, the sun gear of which is fixedly connected to the rotor of the second motor 230, the planet carrier of which is fixedly connected to the second drive shaft 620, and the power drive system also includes a housing 400, the second input planetary gear set 520 being located inside the housing 400, and the gear ring of which is fixedly connected to the housing 400.
[0054] See Figure 2 and Figure 3 The power drive system also includes a meshing third gear 103 and a fourth gear 104, the fourth gear 104 being fixedly connected to the second gear 102 in the third gear set 130; wherein, the third gear 103 is sleeved outside the second drive shaft 620 and is fixedly connected to the sun gear of the second input planetary gear set 520; and / or, the third gear 103 is fixedly connected to the second drive shaft 620.
[0055] In some of these embodiments, see Figure 2 The power drive system also includes a meshing third gear 103 and a fourth gear 104. The fourth gear 104 is fixedly connected to the second gear 102 in the third gear set 130. The third gear 103 is sleeved outside the second drive shaft 620 and is fixedly connected to the sun gear of the second input planetary gear set 520.
[0056] In this embodiment, the third gear 103 is fixedly connected to the sun gear of the second input planetary gear set 520. When the rotor of the second motor 230 rotates, the rotor of the second motor 230 drives the third gear 103 to rotate through the second input planetary gear set 520, and the third gear 103 drives the fourth gear 104 to rotate. Since the fourth gear 104 is fixedly connected to the second gear 102 in the third gear set 130, that is, the fourth gear 104 is also connected to the first bushing 311 and connected to the first output planetary gear set 330 through the first bushing 311, the power on the fourth gear 104 can be transmitted to the wheel 700 through the first output planetary gear set 330, thereby driving the wheel 700 to rotate. Thus, when the second clutch 630 connects the first drive shaft 610 and the second drive shaft 620, the engine 210 can also achieve power coupling and speed decoupling with the second motor 230, further ensuring that the engine 210 maintains a high-efficiency operating range for a long time, reducing the overall vehicle energy consumption.
[0057] It should be noted that, in this embodiment, a second bushing 621 is provided around the second drive shaft 620. The second bushing 621 can rotate relative to the second drive shaft 620. The third gear 103, the rotor of the second motor 230, and the sun gear of the second input planetary gear set 520 are respectively fixedly connected to the second bushing 621.
[0058] In other embodiments, see Figure 3 The power drive system also includes a third gear 103 and a fourth gear 104 that mesh with each other. The fourth gear 104 is fixedly connected to the second gear 102 in the third gear set 130; the third gear 103 is fixedly connected to the second drive shaft 620.
[0059] In this way, the third gear 103 is fixedly connected to the second transmission shaft 620, and the third gear 103 and the second transmission shaft 620 rotate at the same speed, making the transmission method simple.
[0060] Of course, in some other embodiments, see [reference] Figure 4 Alternatively, the second input planetary gear set 520 can be omitted. In this case, the rotor of the second motor 230 is directly connected to the second drive shaft 620, and the third gear 103 is fixedly connected to the second drive shaft 620. In this way, the power of the second motor 230 can be directly transmitted to the wheels through the third gear 103 and the fourth gear 104.
[0061] See also some possible implementations. Figure 3 and Figure 6The power drive system also includes: an output shaft 710, a first output gear 720 and a second output gear 730; the second gear 102 and the first output gear 720 in the third gear set 130 are both sleeved and fixed on the output shaft 710, the second output gear 730 meshes with the first output gear 720, and the second output gear 730 is used for transmission connection with the wheel 700.
[0062] In this embodiment, the power of the second gear 102 in the third gear set 130 is transmitted to the first output gear 720 through the output shaft 710, and then to the wheel 700 through the second output gear 730, so as to drive the wheel 700 to rotate.
[0063] For further details, please refer to [link / reference]. Figure 6 The engine 210 is connected to the first gear 101 in the second gear set 120; wherein, the power drive system includes a third motor 240 and a transmission gear 241, the transmission gear 241 is fixedly connected to the rotor of the third motor 240 and meshes with the second gear 102 in the third gear set 130; and / or, the power drive system includes a fourth motor 250, the rotor of the fourth motor 250 is fixedly connected to the first gear 101 in the first gear set 110.
[0064] The output power of the third motor 240 can be transmitted to the second gear 102 in the third gear set 130 via the transmission gear 241, thereby driving the wheel 700 to rotate. Alternatively, the engine 210 can charge the third motor 240 while driving the wheel 700 to rotate via the second gear 102 in the third gear set 130. Similarly, the fourth motor 250 can drive the wheel 700 to rotate sequentially via the first gear 101 in the first gear set 110, the second gear 102 in the second gear set 120, and the second gear 102 in the third gear set 130. Alternatively, the engine 210 can charge the fourth motor 250 sequentially via the second gear 102 in the third gear set 130, the second gear 102 in the second gear set 120, and the second gear 102 in the first gear set 110 while driving the wheel 700 to rotate via the second gear 102 in the third gear set 130.
[0065] For example, the power drive system of this application may be a first connection structure, a second connection structure, a third connection structure, a fourth connection structure, or a fifth connection structure.
[0066] In the first connection structure, see Figure 6The power drive system includes: a first gear set 110, a second gear set 120, a third gear set 130, an engine 210, an output shaft 710, a first output gear 720, a second output gear 730, a third motor 240, a transmission gear 241, and a fourth motor 250. Each of the first gear set 110, second gear set 120, and third gear set 130 includes a first gear 101, a second gear 102, and a first clutch 105. The first gear 101 and the second gear 102 are connected via the first clutch 105. The first gear 101 in the second gear set 120 meshes with the first gear 101 in the first gear set 110 and the first gear 101 in the third gear set 130, respectively. The second gear 102 in the second gear set 120 meshes with the second gear 102 in the first gear set 110 and the second gear 102 in the third gear set 130, respectively. The first gear 101 in the second gear set 120 is fixedly connected to the engine 210. The second gear 102 and the first output gear 720 in the third gear set 130 are both sleeved and fixed on the output shaft 710. The second output gear 730 meshes with the first output gear 720 and is used for transmission connection with the wheel 700. The transmission gear 241 is fixedly connected to the rotor of the third motor 240 and meshes with the second gear 102 in the third gear set 130. The rotor of the fourth motor 250 is fixedly connected to the first gear 101 in the first gear set 110.
[0067] In the second connection structure, see Figure 3The power drive system includes: a first gear set 110, a second gear set 120, a third gear set 130, an engine 210, a first input planetary gear set 510, a first motor 220, a first drive shaft 610, a second drive shaft 620, a second clutch 630, a second motor 230, a second input planetary gear set 520, a third gear 103, a fourth gear 104, an output shaft 710, a first output gear 720, and a second output gear 730. The first gear set 110, the second gear set 120, and the third gear set 130 each include a first gear 101, a second gear 102, and a first clutch 105. The first gear 101 and the second gear 102 are connected through the first clutch 105. The first gear 101 in the second gear set 120 meshes with the first gear 101 in the first gear set 110 and the first gear 101 in the third gear set 130, respectively. The second gear 102 in the second gear set 120 meshes with the second gear 102 in the first gear set 110 and the second gear 102 in the third gear set 130, respectively. The planet carrier of the first input planetary gear set 510 is fixedly connected to the output shaft of the engine 210, the sun gear of the first input planetary gear set 510 is fixedly connected to the rotor of the first motor 220, and the ring gear of the first input planetary gear set 510 is fixedly connected to the first gear 101 in the first gear set 110. The first drive shaft 610 and the second drive shaft 620 are coaxially arranged and connected by the second clutch 630. The first drive shaft 610 is fixedly connected to the first gear 101 of the second gear set 120. The sun gear of the second input planetary gear set 520 is fixedly connected to the rotor of the second motor 230, the planet carrier of the second input planetary gear set 520 is fixedly connected to the second drive shaft 620, and the ring gear of the second input planetary gear set 520 is fixedly connected to the housing 400. The third gear 103 and the fourth gear 104 mesh with each other. The fourth gear 104 is fixedly connected to the second gear 102 in the third gear set 130, and the third gear 103 is fixedly connected to the second drive shaft 620. The second gear 102 and the first output gear 720 in the third gear set 130 are both sleeved and fixed on the output shaft 710. The second output gear 730 meshes with the first output gear 720 and is used for transmission connection with the wheel 700.
[0068] In the third connection structure, see Figure 4The power drive system includes: a first gear set 110, a second gear set 120, a third gear set 130, an engine 210, a first input planetary gear set 510, a first motor 220, a first drive shaft 610, a second drive shaft 620, a second clutch 630, a second motor 230, a third gear 103, a fourth gear 104, a first half-shaft 310, a second half-shaft 320, a first output planetary gear set 330, and a second output planetary gear set 340. The first gear set 110, the second gear set 120, and the third gear set 130 each include a first gear 101, a second gear 102, and a first clutch 105. The first gear 101 and the second gear 102 are connected through the first clutch 105. The first gear 101 in the second gear set 120 meshes with the first gear 101 in the first gear set 110 and the first gear 101 in the third gear set 130, respectively. The second gear 102 in the second gear set 120 meshes with the second gear 102 in the first gear set 110 and the second gear 102 in the third gear set 130, respectively. The planet carrier of the first input planetary gear set 510 is fixedly connected to the output shaft of the engine 210, the sun gear of the first input planetary gear set 510 is fixedly connected to the rotor of the first motor 220, and the ring gear of the first input planetary gear set 510 is fixedly connected to the first gear 101 in the first gear set 110. The first drive shaft 610 and the second drive shaft 620 are coaxially arranged and connected by the second clutch 630. The first drive shaft 610 is fixedly connected to the first gear 101 of the second gear set 120, and the second drive shaft 620 is fixedly connected to the rotor of the second motor 230. The third gear 103 and the fourth gear 104 mesh with each other. The fourth gear 104 is fixedly connected to the second gear 102 in the third gear set 130, and the third gear 103 is fixedly connected to the second drive shaft 620. The ring gear in the first output planetary gear set 330 is fixedly connected to the ring gear in the second output planetary gear set 340. The sun gear in the first output planetary gear set 330 is fixedly connected to the second gear 102 in the third gear set 130. The planet carrier of the first output planetary gear set 330 is fixedly connected to the end of the first half-shaft 310 away from the wheel 700. The sun gear in the second output planetary gear set 340 is fixedly connected to the end of the second half-shaft 320 away from the wheel 700. The planet carrier in the second output planetary gear set 340 is fixedly connected to the housing 400. The planet gears of the second output planetary gear set 340 include a first sub-planet gear 341 and a second sub-planet gear 342 coaxially connected. The first sub-planet gear 341 is located on the inner circumference of the gear ring of the second output planetary gear set 340 and meshes with the gear ring of the second output planetary gear set 340. The second sub-planet gear 342 is located on the outer circumference of the sun gear of the second output planetary gear set 340 and meshes with the sun gear of the second output planetary gear set 340.The first gear 101 and the second gear 102 in the third gear set 130 and the sun gear in the first output planetary gear set 330 are connected by a first bushing 311. The first bushing 311 is fitted outside the first half-shaft 310 and can rotate relative to the first half-shaft 310.
[0069] In the fourth connection structure, see Figure 5 Based on the third connection structure, a second input planetary gear set 520 is added, meaning the power drive system also includes a second input planetary gear set 520. The sun gear of the second input planetary gear set 520 is fixedly connected to the rotor of the second motor 230, the planet carrier of the second input planetary gear set 520 is fixedly connected to the second drive shaft 620, and the ring gear of the second input planetary gear set 520 is fixedly connected to the housing 400. Unlike the third connection structure, the third gear 103 is sleeved outside the second drive shaft 620 and fixedly connected to the sun gear of the second input planetary gear set 520.
[0070] In the fifth connection structure, see [reference] Figure 2 Unlike the fourth connection structure, the gear ring of the second input planetary gear set 520 is not directly fixed to the outer casing 400. Instead, a first locking mechanism 521 and a second locking mechanism 522 are added to the fourth connection structure. The first locking mechanism 521 cooperates with the gear ring of the second input planetary gear set 520 and is used to lock or release the gear ring of the second input planetary gear set 520. The second locking mechanism 522 cooperates with the planet carrier of the second input planetary gear set 520 and is used to lock or release the gear ring of the second input planetary gear set 520 from the planet carrier.
[0071] Here, taking the fifth connection structure as an example, the working modes of the power drive system are described. The power drive system has electric first gear, continuously variable transmission (CVT) first gear, CVT second gear, CVT third gear, CVT fourth gear, and CVT fifth gear.
[0072] When in electric first gear, refer to Figure 7 The second clutch 630 disconnects the first drive shaft 610 from the second drive shaft 620. The second motor 230 directly drives the sun gear of the first output planetary gear set 330 to rotate through the second bushing 621, the third gear 103, and the fourth gear 104. Then, it drives one of the wheels 700 to rotate through the sun gear of the first output planetary gear set 330, the planet carrier of the first output planetary gear set 330, and the first half-shaft 310 in sequence. At the same time, it also drives the other wheel 700 to rotate through the ring gear of the first output planetary gear set 330, the second output planetary gear set 340, and the second half-shaft 320.
[0073] Furthermore, in the second motor 230 drive mode, reversing and energy recovery are also possible. In reversing mode, the second motor 230 reverses its output to achieve reversing. During energy recovery, the motor converts the vehicle's kinetic energy into electrical energy through negative torque, which is then stored in the power battery.
[0074] When in first gear of a continuously variable transmission (CVT), refer to Figure 8 The engine 210 and the second motor 230 output power. The first gear 101 and the second gear 102 in the first gear set 110 are connected through the first clutch 105. The output power of the engine 210 is transmitted sequentially to the first bushing 311 through the planet carrier of the first input planetary gear set 510, the ring gear of the first input planetary gear set 510, the first gear 101 of the first gear set 110, the second gear 102 of the first gear set 110, and the second gear 102 of the third gear set 130. At the same time, the output power of the second motor 230 is transmitted sequentially to the first bushing 311 through the second bushing 621, the third gear 103, and the fourth gear 104. That is, the two power flows converge to drive the first bushing 311 to rotate. The first bushing 311 drives one wheel 700 to rotate through the first output planetary gear set 330, and drives the other wheel 700 to rotate sequentially through the first output planetary gear set 330 and the second output planetary gear set 340. Meanwhile, during this process, the power output of engine 210 can also be transmitted to the first motor 220 through the sun gear in the first input planetary gear set 510, so that the engine 210 can maintain in the high-efficiency operating range for a long time through the power coupling and speed decoupling between engine 210 and first motor 220.
[0075] When in second gear of the continuously variable transmission (CVT), refer to Figure 9The engine 210 and the second motor 230 output power. The first gear 101 and the second gear 102 in the second gear set 120 are connected through the first clutch 105. The output power of the engine 210 is transmitted sequentially to the first bushing 311 through the planet carrier of the first input planetary gear set 510, the ring gear of the first input planetary gear set 510, the first gear 101 of the second gear set 120, the second gear 102 of the second gear set 120, and the second gear 102 of the third gear set 130. At the same time, the output power of the second motor 230 is transmitted sequentially to the first bushing 311 through the second bushing 621, the third gear 103, and the fourth gear 104. That is, the two power flows converge to drive the first bushing 311 to rotate. The first bushing 311 drives one wheel 700 to rotate through the first output planetary gear set 330, and drives the other wheel 700 to rotate sequentially through the first output planetary gear set 330 and the second output planetary gear set 340. Meanwhile, during this process, the power output of engine 210 can also be transmitted to the first motor 220 through the sun gear in the first input planetary gear set 510, so that the engine 210 can maintain in the high-efficiency operating range for a long time through the power coupling and speed decoupling between engine 210 and first motor 220.
[0076] When using the third gear of a continuously variable transmission (CVT), refer to... Figure 10 The engine 210 and the second motor 230 output power. The first gear 101 and the second gear 102 in the third gear set 130 are connected through the first clutch 105. The output power of the engine 210 is transmitted sequentially to the first bushing 311 through the planet carrier of the first input planetary gear set 510, the ring gear of the first input planetary gear set 510, the first gear 101 of the second gear set 120, the first gear 101 of the third gear set 130, and the second gear 102 of the third gear set 130. At the same time, the output power of the second motor 230 is transmitted sequentially to the first bushing 311 through the second bushing 621, the third gear 103, and the fourth gear 104. That is, the two power flows converge to drive the first bushing 311 to rotate. The first bushing 311 drives one wheel 700 to rotate through the first output planetary gear set 330, and drives the other wheel 700 to rotate sequentially through the first output planetary gear set 330 and the second output planetary gear set 340. Meanwhile, during this process, the power output of engine 210 can also be transmitted to the first motor 220 through the sun gear in the first input planetary gear set 510, so that the engine 210 can maintain in the high-efficiency operating range for a long time through the power coupling and speed decoupling between engine 210 and first motor 220.
[0077] When using the fourth gear of a continuously variable transmission (CVT), refer to... Figure 11The engine 210 and the second motor 230 output power. The second clutch 630 connects the first drive shaft 610 and the second drive shaft 620. The first locking mechanism 521 locks the ring gear of the second input planetary gear set 520 to the housing 400. The output power of the engine 210 is transmitted sequentially through the planet carrier of the first input planetary gear set 510, the ring gear of the first input planetary gear set 510, the first gear 101 of the second gear set 120, the first drive shaft 610, the second drive shaft 620, the planet carrier of the second input planetary gear set 520, and the sun gear of the second input planetary gear set 520 to the second bushing 621. At the same time, the second motor 230 also drives the second bushing 621 to rotate. That is, the two power flows converge to drive the second bushing 621 to rotate. The second bushing 621 then drives the first bushing 311 to rotate sequentially through the third gear 103 and the fourth gear 104. The first bushing 311 drives one of the wheels 700 to rotate via the first output planetary gear set 330, and simultaneously drives the other wheel 700 to rotate via the first output planetary gear set 330 and the second output planetary gear set 340. At the same time, the power output from the engine 210 can also be transmitted to the first motor 220 via the sun gear in the first input planetary gear set 510. This power coupling and speed decoupling between the engine 210 and the first motor 220 allows the engine 210 to maintain its high-efficiency operating range for an extended period.
[0078] When using the fifth gear of a continuously variable transmission (CVT), refer to... Figure 12 The engine 210 and the second motor 230 output power. The second clutch 630 connects the first drive shaft 610 and the second drive shaft 620. The second locking mechanism 522 locks the ring gear of the second input planetary gear set 520 to the planet carrier. At this time, the ring gear, planet carrier, and sun gear of the second input planetary gear set 520 rotate at the same speed. The output power of the engine 210 is transmitted sequentially through the planet carrier of the first input planetary gear set 510, the ring gear of the first input planetary gear set 510, the first gear 101 of the second gear set 120, the first drive shaft 610, the second drive shaft 620, the planet carrier of the second input planetary gear set 520, and the sun gear of the second input planetary gear set 520 to the second bushing 621. At the same time, the second motor 230 also drives the second bushing 621 to rotate. That is, the two power flows converge to drive the second bushing 621 to rotate. The second bushing 621 then drives the first bushing 311 to rotate sequentially through the third gear 103 and the fourth gear 104. The first bushing 311 drives one of the wheels 700 to rotate via the first output planetary gear set 330, and simultaneously drives the other wheel 700 to rotate via the first output planetary gear set 330 and the second output planetary gear set 340. At the same time, the power output from the engine 210 can also be transmitted to the first motor 220 via the sun gear in the first input planetary gear set 510. This power coupling and speed decoupling between the engine 210 and the first motor 220 allows the engine 210 to maintain its high-efficiency operating range for an extended period.
[0079] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.
[0080] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A power drive system, characterized in that, include: The first gear set (110), the second gear set (120), the third gear set (130), and the engine (210); The first gear set (110), the second gear set (120) and the third gear set (130) each include a first gear (101), a second gear (102) and a first clutch (105), and the first gear (101) and the second gear (102) are connected through the first clutch (105); The first gear (101) in the second gear set (120) meshes with the first gear (101) in the first gear set (110) and the first gear (101) in the third gear set (130), respectively; the second gear (102) in the second gear set (120) meshes with the second gear (102) in the first gear set (110) and the second gear (102) in the third gear set (130), respectively. The first gear (101) in the second gear set (120) is connected to the engine (210) for transmission, and the second gear (102) in the third gear set (130) is connected to the wheel (700) for transmission.
2. The power drive system according to claim 1, characterized in that, For any one of the first gear set (110), the second gear set (120) and the third gear set (130), the first gear (101) and the second gear (102) in the gear set are coaxially arranged, and the first clutch (105) is located between the first gear (101) and the second gear (102).
3. The power drive system according to claim 2, characterized in that, The axial directions of the first gear set (110), the second gear set (120), and the third gear set (130) are parallel to each other; And / or, the first gear set (110), the second gear set (120) and the third gear set (130) are arranged along a first direction, which is perpendicular to the output shaft of the engine (210).
4. The power drive system according to any one of claims 1-3, characterized in that, The power drive system also includes: a first half-shaft (310), a second half-shaft (320), a first output planetary gear set (330), and a second output planetary gear set (340); The first output planetary gear set (330) and the second output planetary gear set (340) are connected in a transmission, and the first output planetary gear set (330) is connected in a transmission to the second gear (102) in the third gear set (130); The first half-shaft (310) and the second half-shaft (320) are spaced apart along the first axis direction. The two ends of the first half-shaft (310) and the second half-shaft (320) that are close to each other are respectively connected to the first output planetary gear set (330) and the second output planetary gear set (340). The two ends of the first half-shaft (310) and the second half-shaft (320) that are opposite to each other are respectively used to connect two different wheels (700). The first axis direction is the axis direction of the first half-shaft (310) and the second half-shaft (320).
5. The power drive system according to claim 4, characterized in that, The power drive system also includes a housing (400). The ring gear in the first output planetary gear set (330) is fixedly connected to the ring gear in the second output planetary gear set (340), the sun gear in the first output planetary gear set (330) is fixedly connected to the second gear (102) in the third gear set (130), and the planet carrier of the first output planetary gear set (330) is fixedly connected to the end of the first half-shaft (310) away from the wheel (700). The sun gear in the second output planetary gear set (340) is fixedly connected to the end of the second half-shaft (320) away from the wheel (700), and the planet carrier in the second output planetary gear set (340) is fixedly connected to the outer casing (400).
6. The power drive system according to claim 5, characterized in that, The planet gears of the second output planetary gear set (340) include a first sub-planet gear (341) and a second sub-planet gear (342) coaxially connected. The first sub-planet gear (341) is located on the inner circumference of the gear ring of the second output planetary gear set (340) and meshes with the gear ring of the second output planetary gear set (340). The second sub-planet gear (342) is located on the outer circumference of the sun gear of the second output planetary gear set (340) and meshes with the sun gear of the second output planetary gear set (340).
7. The power drive system according to claim 4, characterized in that, The power drive system further includes: a first input planetary gear set (510) and a first motor (220); the planet carrier of the first input planetary gear set (510) is fixedly connected to the output shaft of the engine (210), the sun gear of the first input planetary gear set (510) is fixedly connected to the rotor of the first motor (220), and the ring gear of the first input planetary gear set (510) is fixedly connected to the first gear (101) in the first gear set (110).
8. The power drive system according to claim 7, characterized in that, The power drive system also includes: a first drive shaft (610), a second drive shaft (620), a second clutch (630), and a second motor (230). The first drive shaft (610) and the second drive shaft (620) are coaxially arranged and connected by the second clutch (630). The first drive shaft (610) is fixedly connected to the first gear (101) of the second gear set (120), and the second drive shaft (620) is connected to the second motor (230) in a transmission connection.
9. The power drive system according to claim 8, characterized in that, The power drive system also includes a second input planetary gear set (520), the sun gear of the second input planetary gear set (520) is fixedly connected to the rotor of the second motor (230), and the planet carrier of the second input planetary gear set (520) is fixedly connected to the second drive shaft (620); The power drive system further includes a housing (400) and a first locking mechanism (521). The first locking mechanism (521) is fixedly connected to the housing (400) and engages with the gear ring of the second input planetary gear set (520). The first locking mechanism (521) is used to connect the gear ring of the second input planetary gear set (520) to the housing (400) or disconnect the gear ring of the second input planetary gear set (520) from the housing (400). And / or, the power drive system further includes a second locking mechanism (522), which is fixedly connected to the gear ring of the second input planetary gear set (520) and cooperates with the planet carrier of the second input planetary gear set (520). The second locking mechanism (522) is used to connect the gear ring of the second input planetary gear set (520) to the planet carrier of the second input planetary gear set (520) or to disconnect the connection between the gear ring of the second input planetary gear set (520) and the planet carrier of the second input planetary gear set (520).
10. The power drive system according to claim 9, characterized in that, The power drive system also includes a meshing third gear (103) and a fourth gear (104), wherein the fourth gear (104) is fixedly connected to the second gear (102) in the third gear set (130); The third gear (103) is sleeved outside the second drive shaft (620) and is fixedly connected to the sun gear of the second input planetary gear set (520); or the third gear (103) is fixedly connected to the second drive shaft (620).
11. The power drive system according to any one of claims 1-3, characterized in that, The power drive system further includes: an output shaft (710), a first output gear (720), and a second output gear (730); the second gear (102) and the first output gear (720) in the third gear set (130) are both sleeved and fixed on the output shaft (710), the second output gear (730) meshes with the first output gear (720), and the second output gear (730) is used for transmission connection with the wheel (700).
12. The power drive system according to claim 11, characterized in that, The engine (210) is connected to the first gear (101) in the second gear set (120); The power drive system includes a third motor (240) and a transmission gear (241). The transmission gear (241) is fixedly connected to the rotor of the third motor (240) and meshes with the second gear (102) in the third gear set (130). And / or, the power drive system includes a fourth motor (250), the rotor of which is fixedly connected to a first gear (101) in the first gear set (110).
13. A vehicle, characterized in that, The vehicle is equipped with the power drive system according to any one of claims 1-12.