Power driving system and vehicle

Abstract

The utility model discloses a power driving system and a vehicle, the power driving system comprises a planetary gear mechanism, the planetary gear mechanism comprises a gear ring, a planet carrier and a sun gear, the planet carrier is provided with a planet gear, and the planet gear is respectively meshed with the gear ring and the sun gear; one of the engine and the first motor is selectively in power connection with the planet carrier, the other one of the engine and the first motor is in power connection with a wheel shaft of the sun wheel, and the first differential mechanism is in power connection with the gear ring; and the second motor is selectively in power connection with the second differential mechanism. According to the power driving system, different power modes of the vehicle can be achieved, power of the engine can be reasonably distributed in the power dividing mode so as to achieve power generation of the first motor, and therefore the high requirements for low electric quantity and long-distance climbing are achieved, the control method is simple and reliable, four-wheel drive is achieved only through the two motors, and the cost is low. The space occupation of the power driving system is reduced, and the arrangement on the whole vehicle is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a power drive system and a vehicle with the power drive system. Background Art

[0002] With the increasing maturity of the development of hybrid vehicles, the types of hybrid dedicated transmissions are also increasing. The common architecture of four-wheel drive vehicles equipped with hybrid dedicated transmissions is to configure a P4 electric bridge at the rear axle of the vehicle to meet the functional requirements. However, the hybrid dedicated transmission at the front axle is generally configured with two motors. There is also a hybrid dedicated transmission with a single motor at the front axle for economy, which cooperates with the P4 motor at the rear axle to achieve four-wheel drive function.

[0003] The two motors of the hybrid dedicated transmission occupy a large space, resulting in the inability to compactly arrange parallel shaft gear transmission, and there are many shafts, so the size of the transmission box is relatively large. The power distribution of the two motors makes the control system complex and the vehicle cost relatively high. In order to meet various usage requirements of the four-wheel drive architecture, the two-motor hybrid dedicated transmission must set a P4 electric bridge at the rear axle of the vehicle. Therefore, the vehicle needs to set three motors, which increases the vehicle control difficulty and cost, and at the same time increases the vehicle's space requirement for installation. Although the single-motor hybrid dedicated transmission and the four-wheel drive architecture can meet the vehicle's usage requirements, since the engine power cannot be distributed for power generation at low battery power and high demand, the front axle of the single motor cannot achieve pure four-wheel drive at low battery power and long uphill climbing with charging at low battery power. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a power drive system, which can flexibly select power sources according to different working conditions to realize different power transmission paths, and then realize different power modes of the vehicle. Moreover, the control method is simple and reliable. Only two motors are set to achieve four-wheel drive, reducing the space occupation of the power drive system and being beneficial to the layout on the vehicle.

[0005] The power drive system according to an embodiment of the utility model includes: a planetary gear mechanism, which includes a ring gear, a planet carrier and a sun gear. The planet carrier is provided with planet gears, and the planet gears are respectively meshed with the ring gear and the sun gear; an engine, a first motor and a first differential. One of the engine and the first motor is selectively power-connected to the planet carrier, and the other of the engine and the first motor is power-connected to the axle of the sun gear. The first differential is power-connected to the ring gear; a second motor and a second differential. The second motor is selectively power-connected to the second differential.

[0006] According to the power drive system of the embodiments of the present utility model, by providing a set of planetary gear mechanism selectively and power-connected to the engine and the first motor, the cooperative work of the engine and the first motor is realized, the power distribution is adjusted, and the four-wheel drive function requirement can be achieved by arranging two motors, namely the first motor and the second motor, on the vehicle, so that the power drive system can flexibly select power sources according to different working conditions to achieve different power transmission paths, and further realize different power modes of the vehicle. In the power split mode, the power of the engine can be reasonably distributed to realize the power generation of the first motor, so as to meet the high demand when the battery has a low power and long-distance climbing is required. Moreover, the control method is simple and reliable. Only two motors are provided to achieve four-wheel drive, reducing the space occupied by the power drive system and facilitating the layout on the vehicle.

[0007] According to the power drive system of some embodiments of the present utility model, the power drive system further includes: a first clutch, the first clutch including a first clutch input element and a first clutch output element, the first clutch input element being connected to the engine, the first clutch output element being connected to the planet carrier, and the first clutch input element and the first clutch output element being selectively engaged.

[0008] According to the power drive system of some embodiments of the present utility model, the power drive system further includes: a second clutch, the second clutch including a second clutch input element and a second clutch output element, the second clutch input element being connected to the planet carrier, the second clutch output element being connected to the axle of the sun gear, and the second clutch input element and the second clutch output element being selectively engaged; and / or, further includes: a third clutch, the third clutch including a third clutch input element and a third clutch output element, the third clutch input element being connected to the planet carrier, the third clutch output element being connected to the ring gear, and the third clutch input element and the third clutch output element being selectively engaged.

[0009] According to the power drive system of some embodiments of the present utility model, the second clutch is installed inside the planet carrier, and the third clutch is installed outside the planet carrier.

[0010] According to the power drive system of some embodiments of the present utility model, the engine and the first motor are respectively located on both sides of the planetary gear mechanism, and the axles of the engine, the first motor and the sun gear are coaxially distributed.

[0011] According to the power drive system of some embodiments of the present utility model, an external tooth portion is provided on the outside of the ring gear, and the first differential is provided with a first output gear, and the external tooth portion meshes with the first output gear.

[0012] According to the power drive system of some embodiments of the present utility model, the first differential is a front-wheel drive differential, and the second differential is a rear-wheel drive differential; wherein, the planetary gear mechanism is located in front of the first differential, and the second motor is located in front of the second differential.

[0013] According to the power drive system of some embodiments of the present utility model, the power drive system further includes a transmission shaft, the transmission shaft is provided with a first transmission gear and a second transmission gear distributed coaxially, the motor shaft of the second motor is provided with a motor gear, the motor gear meshes with the first transmission gear, the second differential is provided with a second output gear, and the second transmission gear meshes with the second output gear.

[0014] According to the power drive system of some embodiments of the present utility model, the motor shaft of the second motor, the transmission shaft and the second differential are distributed in parallel at intervals in the front-rear direction.

[0015] The present utility model also proposes a vehicle.

[0016] According to the vehicle of the embodiments of the present utility model, the power drive system described in any one of the above is provided.

[0017] The advantages of the vehicle and the power drive system over the prior art are the same and will not be elaborated here.

[0018] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a schematic structural diagram of the power drive system according to the embodiments of the present utility model Figure 1 ;

[0021] Figure 2 is a schematic structural diagram of the power drive system according to the embodiments of the present utility model Figure 2 ;

[0022] Figure 3 is a schematic diagram of the power transmission path when the power drive system according to the embodiments of the present utility model is in the pure electric four-wheel drive mode 1;

[0023] Figure 4 is a schematic diagram of the power transmission path when the power drive system according to the embodiments of the present utility model is in the pure electric four-wheel drive mode 2;

[0024] Figure 5 It is a schematic diagram of the power transmission path when the power drive system according to an embodiment of the present invention is in the power split mode;

[0025] Figure 6 It is a schematic diagram of the power transmission path when the power drive system according to an embodiment of the present invention is in the engine direct drive mode;

[0026] Figure 7 It is a schematic diagram of the power transmission path when the power drive system according to an embodiment of the present invention is in the three - power mode;

[0027] Figure 8 It is a schematic diagram of the power transmission path when the power drive system according to an embodiment of the present invention is in the series drive mode / hybrid mode and the charging - while - parking mode.

[0028] Reference numerals:

[0029] Power drive system 100,

[0030] Planetary gear mechanism 1, ring gear 11, external tooth part 111, planet carrier 12, sun gear 13, axle 131, planet gear 14, engine 2, first motor 3, first differential 4, first output gear 41, second motor 5, motor gear 51, motor shaft 52, transmission shaft 53, first transmission gear 54, second transmission gear 55, second differential 6, second output gear 61, first clutch 7, first clutch input element 71, first clutch output element 72, second clutch 8, second clutch input element 81, second clutch output element 82, third clutch 9, third clutch input element 91, third clutch output element 92. Detailed implementation manners

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] Unless otherwise specified, the front-rear direction in this application is the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction is the transverse direction of the vehicle, i.e., the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

[0035] The following refers to Figures 1 - 8 Describe the power drive system 100 according to an embodiment of the present utility model. The power drive system 100 can flexibly select a power source according to different working condition requirements to achieve different power transmission paths, and further achieve different power modes of the vehicle. Moreover, the control method is simple and reliable. Only two motors are provided, reducing the space occupied by the power drive system 100 and facilitating the layout on the whole vehicle.

[0036] As Figures 1 - 8 As shown, the power drive system 100 according to an embodiment of the present utility model includes: a planetary gear mechanism 1, an engine 2, a first motor 3, a first differential 4, a second motor 5 and a second differential 6.

[0037] The planetary gear mechanism 1 includes a ring gear 11, a planet carrier 12, and a sun gear 13. The planet carrier 12 is mounted with planet gears 14, and the planet gears 14 are respectively meshed with the ring gear 11 and the sun gear 13. That is to say, the planet gears 14 are simultaneously meshed with the ring gear 11 and the sun gear 13, and the planet gears 14 are fixedly mounted on the planet carrier 12. In this way, a planetary gear train is formed. When the planet carrier 12 or the sun gear 13 rotates, it can drive the planet gears 14 to rotate around the sun gear 13 inside the ring gear 11. Thus, the power output can be flexibly adjusted by changing the planet carrier 12 or the sun gear 13 to achieve multiple transmission ratios.

[0038] Further, one of the engine 2 and the first motor 3 is selectively power-connected to the planet carrier 12, the other of the engine 2 and the first motor 3 is power-connected to the axle 131 of the sun gear 13, and the first differential 4 is power-connected to the ring gear 11.

[0039] Specifically, the engine 2 provides the power for generating electricity of the first motor 3 and the power for direct driving of the whole vehicle. The first motor 3 can be used as an auxiliary power source or for pure electric drive, that is, the first motor 3 can work independently or in cooperation with the engine 2 to provide additional power or achieve pure electric drive. Among them, the engine 2 can be selectively power-connected to the planet carrier 12, and the first motor 3 is power-connected to the axle 131 of the sun gear 13. In this way, the engine 2 can transmit the power to the planet carrier 12 to drive the planet carrier 12 to rotate, the power of the first motor 3 can be transmitted to the axle 131 of the sun gear 13 to drive the sun gear 13 to rotate, and the power is transmitted through the interaction of the planet gears 14 and the ring gear 11, so as to achieve the cooperative work of the engine 2 and the first motor 3 and adjust the power distribution. Or, the engine 2 can be power-connected to the axle 131 of the sun gear 13, and the first motor 3 is selectively power-connected to the planet carrier 12. In this way, the engine 2 can transmit the power to the axle 131 of the sun gear 13 to drive the sun gear 13 to rotate, the first motor 3 can transmit the power to the planet carrier 12 to drive the planet carrier 12 to rotate, and the power is transmitted through the interaction of the planet gears 14 and the ring gear 11, so as to achieve the cooperative work of the engine 2 and the first motor 3 and adjust the power distribution.

[0040] And the first differential 4 is power-connected to the ring gear 11, that is, the power of the planetary gear mechanism 1 can be transmitted to the first differential 4 through the ring gear 11 to achieve the differential function. Thus, the engine 2 or the first motor 3 can drive the first differential 4 through the planetary gear mechanism 1, and then drive the vehicle.

[0041] Further, the second motor 5 is selectively power-connected to the second differential 6, that is, the second motor 5 can be power-connected to the second differential 6 or not. When the second motor 5 is power-connected to the second differential 6, the second motor 5 can output power to the second differential 6, so that the second motor 5 can independently provide power for the vehicle and transmit the power to the second differential 6 to achieve the differential function. When the second motor 5 is not power-connected to the second differential 6, the second motor 5 has no power output and cannot transmit power to the second differential 6, so it cannot provide power for the vehicle.

[0042] Thus, by setting the two motors, i.e., the first motor 3 and the second motor 5, on the vehicle, the four-wheel drive function requirements can be achieved, enabling the power drive system 100 to flexibly select the power source according to different working conditions to achieve different power transmission paths, and further realizing different power modes of the vehicle. Moreover, the control method is simple and reliable. With only two motors set, the space occupied by the power drive system 100 is reduced, which is beneficial for layout on the vehicle.

[0043] For example, in practice, when the vehicle is in a high battery state and needs to overtake at medium to high speeds, at this time, the engine 2 is power-disconnected from the planet carrier 12, and the power of the engine 2 cannot be transmitted to the first differential 4. The first motor 3 can transmit its power to the first differential 4 through the planetary gear mechanism 1, and the second motor 5 can transmit its power to the second differential 6. Thus, the first motor 3 and the second motor 5 drive simultaneously, and the first differential 4 and the second differential 6 output power simultaneously to meet the usage requirements of the vehicle. Moreover, by flexibly changing the transmission ratio of the planetary gear mechanism 1, different requirements such as quickly overtaking at medium speeds and gently overtaking at medium to high speeds can be achieved. Therefore, the pure electric four-wheel drive mode can be realized, and when the engine 2 is power-disconnected from the planet carrier 12, the pure electric two-wheel drive mode can also be realized.

[0044] When the engine 2 is power-connected to the planet carrier 12, the power of the engine 2 can be transmitted to the first differential 4 through the planetary gear mechanism 1. At this time, the power split mode, engine direct drive mode, three-power mode, series drive mode / hybrid mode, parking charging mode, and energy recovery mode can be realized. And in the power split mode, the power of the engine can be reasonably distributed to generate electricity for the first motor, so as to meet the high demands when the battery is low and long-distance climbing is required.

[0045] According to the power drive system 100 of the embodiments of the present utility model, by arranging a set of planetary gear mechanism 1 to be selectively power-connected to the engine 2 and the first motor 3, the collaborative work of the engine 2 and the first motor 3 is realized, the power distribution is adjusted, and the four-wheel drive function requirement can be realized by arranging two motors, namely the first motor 3 and the second motor 5 on the vehicle. The power drive system 100 can flexibly select power sources according to different working conditions to realize different power transmission paths, and then realize different power modes of the vehicle. In the power split mode, the power of the engine 2 can be reasonably distributed to realize the power generation of the first motor 3, so as to meet the high demand when the battery has a low power and a long-distance climbing is required. Moreover, the control method is simple and reliable. Only two motors are arranged, reducing the space occupation of the power drive system 100, which is beneficial to the layout on the vehicle.

[0046] In some embodiments, the power drive system 100 further includes: a first clutch 7. The first clutch 7 includes a first clutch input element 71 and a first clutch output element 72. The first clutch input element 71 is connected to the engine 2, and the first clutch output element 72 is connected to the planet carrier 12. The first clutch input element 71 and the first clutch output element 72 are selectively engaged.

[0047] That is to say, through the engagement of the first clutch input element 71 and the first clutch output element 72, the power connection between the engine 2 and the planet carrier 12 can be realized, that is, the engine 2 can transmit power to the planet carrier 12 to drive the planet carrier 12 to rotate. Through the disconnection of the first clutch input element 71 and the first clutch output element 72, the power disconnection between the engine 2 and the planet carrier 12 can be realized, and the reverse dragging of the engine 2 in special working conditions can be avoided, resulting in the loss of transmission efficiency.

[0048] Specifically, as Figure 1 shown, the power drive system 100 is provided with a first clutch 7. The first clutch 7 includes a first clutch input element 71 and a first clutch output element 72. The first clutch input element 71 is connected to the engine 2 to receive the power generated by the engine 2. The first clutch output element 72 is connected to the planet carrier 12 and can transmit the received power to the planet carrier 12, thereby driving the operation of the planetary gear mechanism 1 to realize the drive of the vehicle.

[0049] Thus, through the selective engagement of the first clutch input element 71 and the first clutch output element 72, the power transmission or power disconnection between the engine 2 and the planetary gear mechanism 1 is realized, and then different power drive modes of the vehicle are realized.

[0050] In some embodiments, the power drive system 100 further includes: a second clutch 8, which includes a second clutch input element 81 and a second clutch output element 82. The second clutch input element 81 is connected to the planet carrier 12, and the second clutch output element 82 is connected to the axle 131 of the sun gear 13. The second clutch input element 81 and the second clutch output element 82 are selectively engaged.

[0051] That is to say, by engaging or disengaging the second clutch input element 81 and the second clutch output element 82, the power transmission between the planet carrier 12 and the axle 131 can be realized or disconnected, so that the power drive system 100 can adjust the transmission ratio and transmission path according to different working conditions, and realize different power drive modes of the vehicle. For example, when the second clutch input element 81 is engaged with the second clutch output element 82, a pure electric four-wheel drive mode, a three-power mode, a series drive mode / hybrid mode, and a parking charging mode can be realized. When the second clutch input element 81 is disengaged from the second clutch output element 82, a pure electric two-wheel drive mode, a pure electric four-wheel drive mode, a power split mode, an engine direct drive mode, and an energy recovery mode can be realized.

[0052] Specifically, as Figure 1 shown, the power drive system 100 is provided with a second clutch 8, which includes a second clutch input element 81 and a second clutch output element 82. The second clutch input element 81 is connected to the planet carrier 12, so that the second clutch input element 81 can move synchronously with the planet carrier 12. The second clutch output element 82 is connected to the axle 131 of the sun gear 13, so that the second clutch output element 82 can move synchronously with the sun gear 13 and its axle 131. Thus, when the second clutch input element 81 is engaged with the second clutch output element 82, the power can be transmitted from the planet carrier 12 to the sun gear 13 through the second clutch 8, or the power can be transmitted from the sun gear 13 to the planet carrier 12 through the second clutch 8, thereby driving the planet gear 14 to rotate, and then realizing the power transmission through its interaction with the ring gear 11.

[0053] In some embodiments, the power drive system 100 further includes: a third clutch 9, which includes a third clutch input element 91 and a third clutch output element 92. The third clutch input element 91 is connected to the planet carrier 12, and the third clutch output element 92 is connected to the ring gear 11. The third clutch input element 91 and the third clutch output element 92 are selectively engaged.

[0054] That is to say, the power transmission between the planet carrier 12 and the ring gear 11 can be achieved or disconnected by the engagement or disengagement of the third clutch input element 91 and the third clutch output element 92, so that the power drive system 100 can adjust the transmission ratio and transmission path according to different working conditions, realizing different power drive modes of the vehicle. For example, when the third clutch input element 91 is engaged with the third clutch output element 92, the pure electric four-wheel drive mode, the engine direct drive mode and the three-power mode can be realized. When the third clutch input element 91 is disconnected from the third clutch output element 92, the pure electric two-wheel drive mode, the pure electric four-wheel drive mode, the power split mode, the series drive mode / hybrid mode and the charging mode while parking can be realized.

[0055] Specifically, as Figure 1 shown, the power drive system 100 is provided with a third clutch 9. The third clutch 9 includes a third clutch input element 91 and a third clutch output element 92. The third clutch input element 91 is connected to the planet carrier 12. In this way, the third clutch input element 91 can move synchronously with the planet carrier 12. The second clutch output element 92 is connected to the ring gear 11. In this way, the third clutch output element 92 can move with the ring gear. Thus, when the third clutch input element 91 is engaged with the third clutch output element 92, the power can be transmitted from the planet carrier 12 to the ring gear 11 through the third clutch 9, or the power can be transmitted from the ring gear 11 to the planet carrier 12 through the third clutch 9, thereby driving the planet gear 14 to rotate, and then realizing power transmission through its interaction with the ring gear 11.

[0056] Thus, the power of the engine 2 and the first motor 3 can be transmitted to the first differential 4 through different couplings of the first clutch 7, the second clutch 8 and the third clutch 9 in the planetary gear mechanism 1, realizing different working modes.

[0057] In some embodiments, the second clutch 8 is installed inside the planet carrier 12, and the third clutch 9 is installed outside the planet carrier 12.

[0058] Specifically, as Figure 1 shown, the second clutch 8 is installed inside the planet carrier 12 to facilitate connection with the axles 131 of the planet carrier 12 and the sun gear 13. The third clutch 9 is installed outside the planet carrier 12 to facilitate connection with the planet carrier 12 and the ring gear 11. With such a setting, not only the compactness of the structure is improved and the space utilization rate is enhanced, but also the power transmission and speed change of the planetary gear mechanism 1 can be realized through the second clutch 8 and the third clutch 9.

[0059] In some embodiments, the engine 2 and the first motor 3 are respectively located on both sides of the planetary gear mechanism 1, and the axles 131 of the engine 2, the first motor 3 and the sun gear 13 are coaxially distributed.

[0060] Specifically, asFigure 1 As shown, the power drive system 100 is provided with an engine 2, a first motor 3 and a planetary gear mechanism 1. As shown in the up-down direction in the figure, the engine 2 and the first motor 3 are respectively located on the upper and lower sides of the planetary gear mechanism 1. The engine 2 and the first motor 3 are connected through the planetary gear mechanism 1, and the axles 131 of the engine 2, the first motor 3 and the sun gear 13 are coaxially distributed. With such a setting, the engine 2 and the first motor 3 are located on the same axis, which is beneficial to reducing energy loss during power transmission, improving transmission efficiency, and the fact that the engine 2 and the first motor 3 are located on both sides of the planetary gear mechanism 1 enables flexible input and output of power, so that the sun gear 13 can receive power from the engine 2 and the first motor 3.

[0061] And by connecting the first motor 3 and the engine 2 through the planetary gear mechanism 1 and a dual clutch to realize the layout of the reducer, the traditional parallel-axis transmission structure is cancelled, the structure of the transmission is simplified, the first motor 3 and the engine 2 are coaxially arranged, directly reducing the size of the gearbox, improving the structural compactness, thus reducing the space occupied on the whole vehicle, and can be flexibly arranged on the vehicle, while improving the power density, reducing the cost and weight.

[0062] In some embodiments, an external tooth portion 111 is provided on the outer side of the ring gear 11, and the first differential 4 is provided with a first output gear 41, and the external tooth portion 111 meshes with the first output gear 41.

[0063] Specifically, as Figure 1 shown, a third clutch output element 92 is provided on the inner side of the ring gear 11, an external tooth portion 111 is provided on the outer side of the ring gear 11, the first differential 4 is provided with a first output gear 41, and the external tooth portion 111 meshes with the first output gear 41. Thus, the power of the planetary gear mechanism 1 can be transmitted to the first differential 4 through the ring gear 11, so that power distribution can be carried out according to the rotational speed difference of the wheels, ensuring that the vehicle can turn smoothly.

[0064] In some embodiments, the first differential 4 is a front-wheel drive differential, and the second differential 6 is a rear-wheel drive differential, that is, the first differential 4 is mainly responsible for the power distribution of the front wheels, so that when the vehicle turns, the two front wheels can rotate at different speeds, and the second differential 6 is mainly responsible for the power distribution of the rear wheels, so that when the vehicle turns, the two rear wheels can rotate at different speeds, thus ensuring the smooth operation of the vehicle.

[0065] Among them, the planetary gear mechanism 1 is located in front of the first differential 4, and the second motor 5 is located in front of the second differential 6.

[0066] Specifically, as Figure 1As shown in the figure, the left - right direction shown in the figure is the front - rear direction of the vehicle. The planetary gear mechanism 1 is located on the left side of the first differential 4, that is, in front of the first differential 4. The second motor 5 is located on the left side of the second differential 6, that is, in front of the second differential 6. With such an arrangement, the power can be reasonably distributed and converted, improving the energy utilization rate. Moreover, the vehicle can flexibly select the front - wheel drive, rear - wheel drive or four - wheel drive mode according to needs to adapt to different road conditions and driving requirements, thus ensuring the stable and reliable operation of the vehicle.

[0067] In some embodiments, the power drive system 100 further includes a transmission shaft 53. The transmission shaft 53 is provided with a first transmission gear 54 and a second transmission gear 55 coaxially distributed. The motor shaft 52 of the second motor 5 is provided with a motor gear 51. The motor gear 51 meshes with the first transmission gear 54. The second differential 6 is provided with a second output gear 61. The second transmission gear 55 meshes with the second output gear 61.

[0068] Specifically, as Figure 2 shown, the power drive system 100 is further provided with a transmission shaft 53. The transmission shaft 53 is fixedly connected with a first transmission gear 54 and a second transmission gear 55 coaxially distributed. That is, when the transmission shaft 53 rotates, it can drive the first transmission gear 54 and the second transmission gear 55 to rotate synchronously. The motor shaft 52 of the second motor 5 is provided with a motor gear 51, and the motor gear 51 meshes with the first transmission gear 54. That is, when the motor gear 51 rotates, it can drive the first transmission gear 54 to rotate. The second differential 6 is provided with a second output gear 61. The second transmission gear 55 meshes with the second output gear 61. That is, when the second transmission gear 55 rotates, it can drive the second output gear 61 to rotate, thereby transmitting the power to the second differential 6.

[0069] Thus, when the second motor 5 is driving, its motor shaft 52 rotates to drive the motor gear 51 to rotate synchronously. The motor gear 51 rotates and then drives the first transmission gear 54 and the second transmission gear 55 to rotate. The second transmission gear 55 rotates and then drives the second output gear 61 to rotate, thereby realizing the power transmission from the second motor 5 to the second differential 6.

[0070] In some embodiments, the motor shaft 52 of the second motor 5, the transmission shaft 53 and the second differential 6 are spaced apart in parallel in the front - rear direction.

[0071] Specifically, as Figure 2As shown in the figure, the power drive system 100 is provided with a motor shaft 52 of the second motor 5, a transmission shaft 53, and a second differential 6. In the figure, the left-right direction shown is the front-rear direction of the vehicle. The motor shaft 52 of the first motor 3, the transmission shaft 53, and the second differential 6 are arranged in parallel at intervals along the left-right direction, that is, the front-rear direction of the vehicle. The motor shaft 52 of the first motor 3 is located in the front, the second differential 6 is located in the rear, and the transmission shaft 53 is located between the motor shaft 52 and the second differential 6. In this way, it is beneficial to reduce the mutual interference between various transmission components, thereby improving the transmission efficiency and more easily realizing power transmission and synchronous rotation.

[0072] The present utility model also proposes a vehicle.

[0073] The vehicle according to the embodiment of the present utility model is provided with the power drive system 100 of any one of the above embodiments. Among them, by setting a set of planetary gear mechanisms 1 to be selectively power-connected to the engine 2 and the first motor 3, the cooperative work of the engine 2 and the first motor 3 is realized, the power distribution is adjusted, and the four-wheel drive function requirements can be realized by setting the first motor 3 and the second motor 5, that is, two motors, on the whole vehicle. The power drive system 100 can flexibly select power sources according to different working conditions to realize different power transmission paths, and then realize different power modes of the vehicle. In the power split mode, the power of the engine 2 can be reasonably distributed to realize the power generation of the first motor 3, so as to meet the high requirements when the battery power is low and long-distance climbing is required, and the control method is simple and reliable. Only two motors are set to realize four-wheel drive, reducing the space occupied by the power drive system 100 and being beneficial to the layout on the whole vehicle.

[0074] When the power drive system 100 is in different working modes, the motion states of each component are as shown in the following table:

[0075]

[0076] Table 1

[0077] The following describes each working mode of the power drive system 100 of this embodiment in conjunction with Table 1:

[0078] (1) Pure electric two-wheel drive mode: When the vehicle is in the pure electric two-wheel drive mode, the first clutch 7, the second clutch 8, and the third clutch 9 are all disengaged. At this time, the engine 2 and the first motor 3 have no power output, and the second motor 5 is responsible for providing power, that is, the power output by the second motor 5 is used for the whole vehicle to meet the use requirements of the vehicle. Thus, the vehicle can be in medium and high-speed cruising to meet the use requirements.

[0079] (2) Pure Electric Four-wheel Drive Mode 1: When the vehicle is in Pure Electric Four-wheel Drive Mode 1, the first clutch 7 and the second clutch 8 are disengaged, and the third clutch 9 is engaged. At this time, the first motor 3 and the second motor 5 are jointly responsible for providing power, that is, power output is achieved simultaneously on the front axle and the rear axle. The first motor 3 drives the axle 131 of the sun gear 13 to rotate, thereby driving the sun gear 13 to rotate. At the same time, the planet carrier 12 and the ring gear 11 are power-connected through the third clutch 9, that is, the power of the planetary gear mechanism 1 can be transmitted from the planet carrier 12 to the ring gear 11 through the third clutch 9 and from the planet gear 14 to the ring gear 11, thereby adjusting the transmission ratio. Thus, the demand for rapid overtaking at medium vehicle speeds when the vehicle has a high battery charge can be met.

[0080] (2) Pure Electric Four-wheel Drive Mode 2: When the vehicle is in Pure Electric Four-wheel Drive Mode 2, the first clutch 7 and the third clutch 9 are disengaged, and the second clutch 8 is engaged. At this time, the first motor 3 and the second motor 5 are jointly responsible for providing power. The first motor 3 drives the axle 131 of the sun gear 13 to rotate, thereby driving the sun gear 13 to rotate. At the same time, the axle 131 and the planet carrier 12 are power-connected through the second clutch 8, that is, power can be transmitted from the axle 131 to the planet carrier 12 through the second clutch 8, from the sun gear 13 to the planet gear 14 and the planet carrier 12, and then from the planet gear 14 to the ring gear 11, thereby adjusting the transmission ratio and realizing the power output of the planetary gear mechanism 1. Its power is transmitted to the first differential 4. Thus, the demand for gentle overtaking at medium to high vehicle speeds when the vehicle has a high battery charge can be met.

[0081] Thus, in the pure electric four-wheel drive mode, different transmission ratios of the planetary gear mechanism 1 can be achieved by switching the states of the second clutch 8 and the third clutch 9, refining the power demand of the whole vehicle, realizing the flexible conversion between Pure Electric Four-wheel Drive Mode 1 and Pure Electric Four-wheel Drive Mode 2, and meeting the different power demands of the vehicle.

[0082] (3) Power Split Mode: When the vehicle is in the power split mode, the first clutch 7 is engaged, and the second clutch 8 and the third clutch 9 are disengaged. At this time, the engine 2 and the first motor 3 work, that is, the front axle is directly driven by the engine 2, and the rear axle is power-assisted. Moreover, the second motor 5 can be selectively driven and stopped according to the battery charge. Among them, the first motor 3 needs to receive the power of the engine 2 to generate electricity, that is, the output power of the engine 2 is divided into two parts. A part of the power of the engine 2 can be transmitted to the first differential 4 through the planetary gear mechanism 1 for direct drive, and the other part of the power is used to be transmitted to the first motor 3 for generating electricity. At the same time, the power of the first motor 3 can be transmitted to the first differential 4 through the planetary gear mechanism 1, thereby realizing high-power power generation while the engine 2 is directly driving, and the engine 2 and the first motor 3 can jointly drive the vehicle to meet the power demand when the vehicle has a low battery charge and needs to climb a long slope.

[0083] (4) Engine direct drive mode: When the vehicle is in the engine direct drive mode, the first clutch 7 and the third clutch 9 are engaged, and the second clutch 8 is disengaged. At this time, the first engine 2 does not participate in power generation and has no power output. The second motor 5 selectively participates in driving. The engine 2 is responsible for providing power for direct drive. That is, the power of the engine 2 can be transmitted from the planet carrier 12 to the ring gear 11 through the third clutch 9. At the same time, it can also be transmitted from the planet carrier 12 to the ring gear 11 through the planet gears 14, and then transmitted to the first differential 4 to achieve power transmission. Thus, the power retention requirement of the vehicle can be met.

[0084] (5) Three-power mode: When the vehicle is in the three-power mode, the first clutch 7, the second clutch 8, and the third clutch 9 are all engaged. At this time, the engine 2, the first motor 3, and the second motor 5 all participate in driving to provide power. That is, the power of the engine 2 can be transmitted from the planet carrier 12 to the ring gear 11 through the third clutch 9. The power of the first motor 3 can be transmitted from the axle 131 of the sun gear 13 to the planet carrier 12 through the second clutch 8 and is transmitted to the ring gear 11 together with the power of the engine 2. At the same time, the power of the first motor 3 can be transmitted from the planet gears 14 to the ring gear 11 and finally transmitted from the ring gear 11 to the first differential 4. In other words, the power of the first motor 3 and the engine 2 can be coupled and transmitted to the first differential 4 through the planetary gear structure to achieve power transmission, so as to meet the catapult and special requirements. In this mode, the vehicle needs to have sufficient battery charge.

[0085] (6) Series drive mode / hybrid mode and parking charging mode: When the vehicle is in the series drive mode / hybrid mode, the first clutch 7 and the second clutch 8 are engaged, and the third clutch 9 is disengaged. At this time, the engine 2 and the first motor 3 participate in the operation. The first motor 3 must bear the power of the engine 2 for power generation. The second motor 5 participates in driving. That is, the front axle generates power and the rear axle drives. The power of the engine 2 can be transmitted from the planet carrier 12 to the first motor 3 through the second clutch 8, the axle 131 of the sun gear 13, and the planet gears 14 so that the first motor 3 can generate power. When driving, the second motor 5 is used for driving. At the same time, when the second motor 5 does not participate in driving, that is, when the vehicle is in a parked state, it is the parking charging mode.

[0086] (7) Energy recovery mode: When the vehicle is in the energy recovery mode, the first clutch 7 and the second clutch 8 are disengaged, and the third clutch 9 is engaged. At this time, when the brake pedal is depressed, the vehicle will generate electricity using the braking energy. The first motor 3 and the second motor 5 can generate electricity simultaneously, or generate electricity separately, and generate electrical energy by recovering the braking energy and storing it in the battery, thereby improving the energy utilization efficiency.

[0087] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A power drive system, characterized in that: include: A planetary gear mechanism, the planetary gear mechanism comprising a ring gear, a planet carrier and a sun gear, the planet carrier being mounted with planetary gears, the planetary gears being meshed with the ring gear and the sun gear respectively; An engine, a first motor and a first differential, wherein one of the engine and the first motor is selectively connected to the planet carrier in power, the other of the engine and the first motor is connected to the axle of the sun gear in power, and the first differential is connected to the ring gear in power; A second electric machine and a second differential are selectively power-connected to the second electric machine.

2. The power drive system according to claim 1, characterized in that: Also includes: The first clutch comprises a first clutch input element and a first clutch output element, wherein the first clutch input element is connected to the engine, the first clutch output element is connected to the planet carrier, and the first clutch input element and the first clutch output element are selectively coupled.

3. The power drive system according to claim 1, characterized in that: Also includes: a second clutch, the second clutch comprising a second clutch input element and a second clutch output element, the second clutch input element being connected to the planet carrier, the second clutch output element being connected to the axle of the sun gear, the second clutch input element and the second clutch output element being selectively coupled; And / or, it also includes: a third clutch, the third clutch includes a third clutch input element and a third clutch output element, the third clutch input element is connected to the planetary carrier, the third clutch output element is connected to the ring gear, and the third clutch input element and the third clutch output element are selectively combined.

4. The power drive system according to claim 3, characterized in that: The second clutch is installed on the inner side of the planet carrier, and the third clutch is installed on the outer side of the planet carrier.

5. The power drive system according to claim 1, characterized in that: The engine and the first motor are respectively located on both sides of the planetary gear mechanism, and the axles of the engine, the first motor and the sun gear are coaxially distributed.

6. The power drive system according to claim 1, characterized in that: An outer side of the gear ring is provided with an external tooth portion, the first differential is provided with a first output gear, and the external tooth portion is meshed with the first output gear.

7. The power drive system according to any one of claims 1 to 6, characterized in that: The first differential is a front drive differential, and the second differential is a rear drive differential; Wherein, the planetary gear mechanism is arranged in front of the first differential, and the second motor is arranged in front of the second differential.

8. The power drive system according to any one of claims 1 to 6, characterized in that: It also includes a transmission shaft, which is provided with a first transmission gear and a second transmission gear distributed coaxially, the motor shaft of the second motor is provided with a motor gear, the motor gear is meshed with the first transmission gear, the second differential is provided with a second output gear, and the second transmission gear is meshed with the second output gear.

9. The power drive system according to claim 8, characterized in that: The motor shaft of the second motor, the transmission shaft and the second differential are distributed in parallel and spaced apart in the front-rear direction.

10. A vehicle, characterized in that: A power drive system according to any one of claims 1 to 9 is provided.

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