Hybrid power driving system and vehicle

Abstract

The invention belongs to the technical field of vehicles, and particularly relates to a hybrid power driving system and a vehicle. The planetary gear mechanism comprises an inner gear ring group, a sun gear assembly located in the center of the inner gear ring group, a plurality of planet gears meshed between the inner gear ring group and the sun gear assembly, and a planet carrier rotationally connected with the planet gears; the first motor is connected with the sun gear assembly; the engine is connected with the planet carrier; the first coupler is connected with the inner gear ring group and the transmission gear, so that the inner gear ring group is combined with or disconnected from the transmission gear; the second coupler is connected with the inner gear ring set, the sun gear assembly and the gearbox shell so that the inner gear ring set can be combined with or disconnected from the sun gear assembly and the gearbox shell. The first differential mechanism is in transmission connection with the transmission gear and is connected with the first axle; the second differential mechanism is connected with the second axle; the second motor is in transmission connection with the second differential mechanism; and the battery is electrically connected with the first motor and the second motor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a hybrid power driving system and a vehicle. BACKGROUND

[0002] With the increasing awareness of energy saving and environmental protection in today's society, new energy vehicle technology has developed rapidly. Hybrid vehicle driving technology is the core stage of the development process of new energy vehicles. Improving fuel economy and reducing emissions are important issues faced by hybrid technology.

[0003] In the related art, the hybrid power driving system has multiple modes, but the switching between multiple modes is complex. SUMMARY

[0004] To solve the above technical problems, the present application provides a hybrid power driving system and a vehicle, which aims to at least solve the technical problem of complex switching between multiple modes of the hybrid power driving system.

[0005] The technical scheme of the present application is as follows:

[0006] A hybrid power driving system comprises: a planetary gear mechanism comprising an inner ring set, a sun wheel assembly located at the center of the inner ring set, a plurality of planetary gears meshing between the inner ring set and the sun wheel assembly, and a planetary carrier rotatingly connecting the plurality of planetary gears; a first motor connected with the sun wheel assembly; an engine connected with the planetary carrier; a first coupling connected with the inner ring set and a transmission gear to combine or disconnect the inner ring set and the transmission gear; a second coupling connected with the inner ring set, the sun wheel assembly and the transmission case to combine or disconnect the inner ring set, the sun wheel assembly and the transmission case; a first differential connected with the transmission gear in transmission and connected with a first axle; a second differential connected with a second axle; a second motor connected with the second differential in transmission; and a battery electrically connected with the first motor and the second motor.

[0007] In some embodiments, the second coupling comprises: a first connecting part connected with the inner ring set and switchable between a first position, a second position and a third position; a second connecting part connected with the sun wheel assembly; and a third connecting part connected with the transmission case; wherein when the first connecting part is located at the first position, the first connecting part is combined with the third connecting part, when the first connecting part is located at the second position, the first connecting part is disconnected from the third connecting part and the second connecting part, and when the first connecting part is located at the third position, the first connecting part is combined with the second connecting part.

[0008] In some embodiments, the sun gear assembly includes: a sun gear located at the center of the inner ring gear group and meshing with multiple planetary gears; a first connecting shaft, one end of which is connected to the sun gear and the other end is connected to the first motor; wherein the first connecting shaft is arranged parallel to the first wheel axle, and the first connecting shaft is connected to the second connecting part.

[0009] In some embodiments, the inner ring gear set includes: an inner ring gear meshing with the plurality of planetary gears and connected to the first coupler; and an inner ring gear shaft connected to the inner ring gear and to the first connecting portion.

[0010] In some embodiments, the first differential is provided with a first main reduction driven gear, and the first main reduction driven gear is transmission-connected to the transmission gear via a first reduction gear mechanism.

[0011] In some embodiments, the first reduction gear mechanism includes: a first intermediate shaft, one end of which is provided with a first intermediate shaft gear engaged with the transmission gear, and the other end of which is provided with a first main reduction driving gear engaged with the first main reduction driven gear; wherein, the first intermediate shaft is arranged parallel to the first wheel axle.

[0012] In some embodiments, the second differential is provided with a second main reduction driven gear, and the second main reduction driven gear is transmission-connected to the second motor via a second reduction gear mechanism.

[0013] In some embodiments, the second reduction gear mechanism includes: a second intermediate shaft, one end of which is provided with a second intermediate shaft gear, and the other end of which is provided with a second main reduction driving gear meshing with the second main reduction driven gear; wherein, the second intermediate shaft is arranged parallel to the second wheel axle, and the hybrid drive system also includes a second connecting shaft connected to the second motor, the second connecting shaft is provided with a connecting gear meshing with the second intermediate shaft gear, and the second connecting shaft is arranged parallel to the second intermediate shaft.

[0014] In some embodiments, the hybrid drive system further includes: a third connecting shaft connected to the planetary wheel carrier; and a torsional vibration damper connected to the fourth connecting shaft and the crankshaft of the engine.

[0015] Based on the same inventive concept, the present application also provides a vehicle comprising the hybrid drive system.

[0016] The beneficial effects of the present invention include at least:

[0017] Since the planetary gear mechanism includes an inner ring gear group, a sun gear assembly located at the center of the inner ring gear group, a plurality of planetary gears meshed between the inner ring gear group and the sun gear assembly, and a planetary gear carrier that rotatably connects the plurality of planetary gears; the first motor is connected to the sun gear assembly; the engine is connected to the planetary gear carrier; the first coupler is connected to the inner ring gear group and the transmission gear to enable the inner ring gear group to be coupled or disconnected from the transmission gear; the second coupler is connected to the inner ring gear group, the sun gear assembly and the transmission housing to enable the inner ring gear group to be coupled or disconnected from the sun gear assembly and the transmission housing; the first differential is transmission-connected to the transmission gear and connected to the first axle; the second differential is connected to the second axle; the second motor is transmission-connected to the second differential; and the battery is electrically connected to the first motor and the second motor.

[0018] Therefore, when EV (Electric Vehicle, pure electric) driving is performed, that is, rear-wheel drive mode, the first coupler disconnects the inner ring gear set from the transmission gear. At this time, the inner ring gear set is disconnected from the transmission gear, and the second coupler disconnects the inner ring gear set from the transmission housing and the sun gear assembly. The battery supplies power to the second motor to start the second motor. The power of the second motor is transmitted to the second axle through the second differential to drive the second axle to move, thereby realizing EV drive.

[0019] During the first series mode, the first coupler disconnects the ring gear assembly from the transmission gear. The second coupler connects the ring gear assembly to the transmission housing, and the ring gear assembly rotates at zero speed. This creates an overdrive gear with a speed ratio of less than 1 between the planetary carrier and the sun gear assembly. The engine starts, and the engine power is transmitted to the first motor through the planetary carrier, planetary gears, and sun gear assembly, allowing the first motor to charge the battery. The battery powers the second motor, starting it. The second motor transmits power to the second differential, which in turn transmits power to the second axle, driving the second axle to achieve the first series mode. At this point, the engine power and the second motor's power flow are completely decoupled, independently affecting each other.

[0020] During the second series mode, the first coupler disconnects the ring gear assembly from the transmission gear, disconnecting them. The second coupler couples the ring gear assembly to the sun gear assembly, creating a 1:1 planetary gear ratio. The engine is started, and engine power is transmitted to the first motor via the planetary carrier, planetary gears, and sun gear assembly, allowing the first motor to charge the battery, achieving the second series mode. At this point, the battery can power the second motor to start it, but it doesn't have to.

[0021] During the first engine start mode, the first coupler disconnects the ring gear assembly from the transmission gear. The second coupler couples the ring gear assembly to the transmission housing, connecting the ring gear assembly to the transmission housing. The ring gear assembly rotates at zero speed, creating an overdrive gear with a speed ratio of less than 1 between the planetary gear carrier and the sun gear assembly. The battery supplies power to the first motor, starting the first motor. The power from the first motor is transmitted to the engine via the sun gear assembly, planetary gears, and planetary gear carrier, driving the engine and achieving the first engine start mode. At this point, the battery can supply power to the second motor to start the second motor, but the battery may not supply power to the second motor.

[0022] During the second engine start mode, the first coupler disconnects the ring gear assembly from the transmission gear. The second coupler couples the ring gear assembly to the sun gear assembly, connecting the ring gear assembly and the sun gear assembly, creating a 1:1 planetary gear ratio. The battery powers the first motor, starting it. The power from the first motor is transmitted to the engine via the sun gear assembly, planetary gears, and planetary gear carrier, driving the engine and achieving the second engine start mode. At this point, the battery can power the second motor to start it, but it can also power the second motor.

[0023] During ECVT (Electronic Continuously Variable Transmission) mode, the first coupler couples the ring gear assembly with the transmission gear, connecting the ring gear assembly to the transmission gear. The second coupler disconnects the ring gear assembly from the transmission housing and the sun gear assembly, disconnecting the ring gear assembly from both. The engine is started, and engine power is transmitted through the planetary carrier and planetary gears to the ring gear assembly and the sun gear assembly. The sun gear assembly then transmits power to the first motor, allowing the first motor to charge the battery. The ring gear assembly then transmits power through the transmission gear, which in turn transmits power to the first differential. The first differential then transmits power to the first axle, driving the first axle to achieve vehicle movement. This achieves engine power diversion, allowing the engine to drive while generating electricity while driving, thus achieving ECVT mode. At this time, the battery does not need to supply power to the second motor.

[0024] When in the braking capacity recovery mode, the first coupler disconnects the inner ring gear set from the transmission gear. At this time, the inner ring gear set is disconnected from the transmission gear, and the second coupler disconnects the inner ring gear set from the transmission housing and the sun gear assembly. The engine power will not be transmitted to the first differential. When the vehicle is in braking and coasting conditions, the kinetic energy of the wheel is transmitted to the second differential through the second wheel axle, and the second differential is transmitted to the second motor. The torque of the second motor is reversed to charge the battery, realizing the braking energy recovery mode.

[0025] In engine-driven mode, the first coupler connects the ring gear assembly to the drive gear. At this point, the ring gear assembly is connected to the drive gear, while the second coupler connects the ring gear assembly to the sun gear assembly, creating a 1:1 planetary gear ratio. When the engine is started, engine power is transmitted through the planetary carrier, planetary gears, ring gear assembly, and drive gear to the first differential, which in turn transmits power to the first axle, driving the first axle and enabling vehicle travel, thus achieving engine-driven mode. In this state, the battery does not need to power the second motor.

[0026] When the first four-wheel drive mode is in operation, the first coupler combines the inner ring gear set with the transmission gear. At this time, the inner ring gear set is connected to the transmission gear, and the second coupler disconnects the inner ring gear set from the transmission housing and the sun gear assembly. The engine is started, and the power of the engine is transmitted to the inner ring gear set and the planetary gear assembly through the planetary carrier and the planetary gear. The inner ring gear set transmits the power through the transmission gear, and the transmission gear transmits the power to the first differential. The first differential transmits the power to the first wheel axle to drive the first wheel axle to move. The sun gear assembly transmits the power to the first motor so that the first motor charges the battery, and the battery supplies power to the second motor. The second motor is started, and the power of the second motor is transmitted to the second wheel axle through the second differential to drive the second wheel axle to move, thereby realizing the first four-wheel drive mode.

[0027] When the second four-wheel drive mode is in operation, the first coupler combines the inner ring gear set with the transmission gear. At this time, the inner ring gear set is connected to the transmission gear, and the second coupler combines the inner ring gear set with the sun gear assembly. The engine is started, and the power of the engine is transmitted to the inner ring gear set and the planetary gear assembly through the planetary gear carrier and the planetary gear. The inner ring gear set transmits the power through the transmission gear, and the transmission gear transmits the power to the first differential. The first differential transmits the power to the first wheel axle to drive the first wheel axle to move. The sun gear assembly transmits the power to the first motor so that the first motor charges the battery, and the battery supplies power to the second motor. The second motor is started, and the power of the second motor is transmitted to the second wheel axle through the second differential to drive the second wheel axle to move, thereby realizing the second four-wheel drive mode.

[0028] This application utilizes a planetary gear mechanism, a first coupler, and a second coupler to implement EV drive, a first series mode, a second series mode, a first engine start mode, a second engine start mode, an ECVT mode, a braking capacity recovery mode, an engine drive mode, a first four-wheel drive mode, and a second four-wheel drive mode. The drive mode can be switched simply by disconnecting or connecting the first coupler and the second coupler, making mode switching simple. Furthermore, the absence of synchronizers, shift hubs, shift motors, and other mechanisms makes the overall structure of the hybrid drive system more compact, simplifies the system, reduces costs, and shortens the axial dimension of the hybrid drive system, facilitating layout and mounting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 Schematic diagram of the hybrid drive system and vehicle of this embodiment.

[0031] In the attached figure:

[0032] Planetary gear mechanism 10, inner ring gear set 11, inner ring gear 111, inner ring gear shaft 112, sun gear assembly 12, sun gear 121, first connecting shaft 122, planetary gears 13, planetary gear carrier 14, transmission gear 15; first motor 20; engine 30; first coupler 40; second coupler 50, first connecting portion 51, second connecting portion 52, third connecting portion 53; first differential 60, first main reduction driven gear 61; second differential 70, second main reduction driven gear 71; second motor 80, second connecting shaft 81, connecting gear 82; battery 90; first axle 100; second axle 110; first intermediate shaft 1201, first intermediate shaft gear 1202, first main reduction driving gear 1203; second reduction gear mechanism 130, second intermediate shaft 1301, second intermediate shaft gear 1302, second main reduction driving gear 1303; third connecting shaft 140; torsional vibration damper 150. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship and movement status of various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0038] The hybrid drive system and vehicle provided in this embodiment are intended to at least to some extent resolve the complex technical problem of switching between multiple modes of the hybrid drive system.

[0039] Figure 1 FIG. 1 is a schematic diagram of the structure of the hybrid drive system and vehicle of this embodiment. Figure 1The hybrid drive system of the present embodiment includes a planetary gear mechanism 10, a first motor 20, an engine 30, a first coupler 40, a second coupler 50, a first differential 60, a second differential 70, a second motor 80, and a battery 90. The planetary gear mechanism 10 includes an internal ring gear set 11, a sun gear assembly 12 located at the center of the internal ring gear set 11, a plurality of planetary gears 13 meshed between the internal ring gear set 11 and the sun gear assembly 12, and a planetary gear carrier 14 rotatably connecting the plurality of planetary gears 13. The first motor 20 is connected to the sun gear assembly 12. The engine 30 is connected to the planetary gear carrier 14. The first coupler 40 is connected to the internal ring gear set 11 and the transmission gear 15 to connect or disconnect the internal ring gear set 11 from the transmission gear 15. The second coupler 50 is connected to the internal ring gear set 11, the sun gear assembly 12, and the transmission housing to connect or disconnect the internal ring gear set 11 from the sun gear assembly 12 and the transmission housing. The first differential 60 is in driving connection with the transmission gear 15 and is connected to the first axle 100. The second differential 70 is connected to the second axle 110. The second motor 80 is in driving connection with the second differential 70. The battery 90 is electrically connected to the first motor 20 and the second motor 80.

[0040] The planetary gear mechanism 10 includes an inner ring gear assembly 11, a sun gear assembly 12 located at the center of the inner ring gear assembly 11, a plurality of planet gears 13 meshing between the inner ring gear assembly 11 and the sun gear assembly 12, and a planetary gear carrier 14 rotatably connecting the plurality of planet gears 13. A first motor 20 is connected to the sun gear assembly 12. An engine 30 is connected to the planetary gear carrier 14. A first coupler 40 is connected to the inner ring gear assembly 11 and the transmission gear 15 to couple or disconnect the inner ring gear assembly 11 with the transmission gear 15. A second coupler 50 is connected to the inner ring gear assembly 11, the sun gear assembly 12, and the transmission housing to couple or disconnect the inner ring gear assembly 11 with the sun gear assembly 12 and the transmission housing. A first differential 60 is drivingly connected to the transmission gear 15 and to the first axle 100. A second differential 70 is connected to the second axle 110. A second motor 80 is drivingly connected to the second differential 70. A battery 90 is electrically connected to the first motor 20 and the second motor 80.

[0041] Therefore, when performing EV (Electric Vehicle, pure electric) driving, that is, rear-wheel drive mode, the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The battery 90 supplies power to the second motor 80 to start the second motor 80. The power of the second motor 80 is transmitted to the second wheel axle 110 through the second differential 70 to drive the second wheel axle 110 to move, thereby realizing EV driving.

[0042] During the first series mode, the first coupler 40 disconnects the ring gear assembly 11 from the transmission gear 15. The second coupler 50 couples the ring gear assembly 11 to the transmission housing, causing the ring gear assembly 11 to rotate at zero speed. This creates an overdrive gear with a speed ratio of less than 1 between the planetary carrier 14 and the sun gear assembly 12. The engine 30 is started, and its power is transmitted to the first motor 20 via the planetary carrier 14, the planetary gears 13, and the sun gear assembly 12, allowing the first motor 20 to charge the battery 90. The battery 90 then supplies power to the second motor 80, starting it. The second motor 80 then transmits power to the second differential 70, which in turn transmits power to the second axle 110, driving the second axle 110 to achieve the first series mode. At this point, the power flows of the engine 30 and the second motor 80 are completely decoupled and do not affect each other.

[0043] During the second series mode, the first coupler 40 disconnects the ring gear assembly 11 from the transmission gear 15. At this point, the ring gear assembly 11 and the transmission gear 15 are disconnected, and the second coupler 50 couples the ring gear assembly 11 to the sun gear assembly 12, creating a 1:1 planetary gear ratio. The engine 30 is started, and its power is transmitted to the first motor 20 via the planetary carrier 14, the planetary gears 13, and the sun gear assembly 12, allowing the first motor 20 to charge the battery 90, thereby achieving the second series mode. At this point, the battery 90 can supply power to the second motor 80 to start the second motor 80, but it is not necessary for the battery 90 to supply power to the second motor 80.

[0044] During the first engine 30 starting mode, the first coupler 40 disconnects the ring gear assembly 11 from the transmission gear 15. At this point, the ring gear assembly 11 is disconnected from the transmission gear 15. The second coupler 50 couples the ring gear assembly 11 to the transmission housing, connecting the ring gear assembly 11 to the transmission housing. The ring gear assembly 11 rotates at zero speed, creating an overdrive gear with a speed ratio of less than 1 between the planetary gear carrier 14 and the sun gear assembly 12. The battery 90 supplies power to the first motor 20, starting the first motor 20. The power from the first motor 20 is transmitted to the engine 30 via the sun gear assembly 12, the planetary gears 13, and the planetary gear carrier 14, driving the engine 30 and achieving the first engine 30 starting mode. At this point, the battery 90 can supply power to the second motor 80 to start the second motor 80. Alternatively, the battery 90 may not supply power to the second motor 80.

[0045] During the second engine 30 starting mode, the first coupler 40 disconnects the ring gear assembly 11 from the transmission gear 15. The second coupler 50 couples the ring gear assembly 11 to the sun gear assembly 12, connecting the ring gear assembly 11 and the sun gear assembly 12, creating a 1:1 planetary gear ratio. The battery 90 supplies power to the first motor 20, starting the first motor 20. The power from the first motor 20 is transmitted to the engine 30 via the sun gear assembly 12, the planetary gears 13, and the planetary gear carrier 14, driving the engine 30 and achieving the second engine 30 starting mode. At this point, the battery 90 can supply power to the second motor 80 to start the second motor 80, but the battery 90 may not supply power to the second motor 80.

[0046] During ECVT (Electr1ic C1tinuously Variable In the electronically controlled continuously variable transmission (CVT) mode, the first coupler 40 couples the inner ring gear set 11 with the transmission gear 15. At this time, the inner ring gear set 11 is connected to the transmission gear 15. The second coupler 50 disconnects the inner ring gear set 11 from the transmission case and the sun gear assembly 12. The inner ring gear set 11 is disconnected from the transmission case and the sun gear assembly 12. The engine 30 is started, and the power of the engine 30 is transmitted to the inner ring gear set 11 and the sun gear assembly 12 through the planetary carrier 14 and the planetary gears 13. The sun gear assembly 12 transmits power to the first motor 20, so that the first motor 20 charges the battery 90. The inner ring gear set 11 transmits power through the transmission gear 15, and the transmission gear 15 transmits power to the first differential 60. The first differential 60 transmits power to the first axle 100 to drive the first axle 100 to achieve vehicle travel, thereby achieving power diversion of the engine 30 and achieving the engine 30 driving while generating electricity while driving, thereby achieving the ECVT mode. At this time, the battery 90 may not supply power to the second motor 80 .

[0047] When the braking capacity recovery mode is in progress, the first coupler 40 disconnects the inner ring gear set 11 from the transmission gear 15. At this time, the inner ring gear set 11 is disconnected from the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The power of the engine 30 will not be transmitted to the first differential 60. When the vehicle is in braking and gliding conditions, the kinetic energy of the wheels is transmitted to the second differential 70 through the second wheel axle 110, and the second differential 70 is transmitted to the second motor 80. The torque of the second motor 80 is reversed to charge the battery 90, thereby realizing the braking energy recovery mode.

[0048] In engine 30 drive mode, the first coupler 40 couples the ring gear assembly 11 to the transmission gear 15. At this point, the ring gear assembly 11 is connected to the transmission gear 15, and the second coupler 50 couples the ring gear assembly 11 to the sun gear assembly 12, creating a 1:1 planetary gear ratio. When the engine 30 is started, the power of the engine 30 is transmitted to the first differential 60 via the planetary carrier 14, planetary gears 13, the ring gear assembly 11, and the transmission gear 15. The first differential 60 then transmits the power to the first axle 100, driving the first axle 100 to achieve vehicle travel, thus achieving engine 30 drive mode. At this point, the battery 90 does not need to supply power to the second motor 80.

[0049] When the first four-wheel drive mode is in operation, the first coupler 40 couples the inner ring gear set 11 with the transmission gear 15. At this time, the inner ring gear set 11 is connected to the transmission gear 15, and the second coupler 50 disconnects the inner ring gear set 11 from the transmission housing and the sun gear assembly 12. The engine 30 is started, and the power of the engine 30 is transmitted to the inner ring gear set 11 and the planetary gear 13 assembly through the planetary carrier 14 and the planetary gear 13. The inner ring gear set 11 transmits power through the transmission gear 15, and the transmission gear 15 transmits power to the first differential 60. The first differential 60 transmits power to the first axle 100 to drive the first axle 100 to move. The sun gear assembly 12 transmits power to the first motor 20, so that the first motor 20 charges the battery 90, and the battery 90 supplies power to the second motor 80. The second motor 80 is started, and the power of the second motor 80 is transmitted to the second axle 110 through the second differential 70 to drive the second axle 110 to move, thereby realizing the first four-wheel drive mode.

[0050] When the second four-wheel drive mode is in operation, the first coupler 40 couples the inner ring gear set 11 with the transmission gear 15. At this time, the inner ring gear set 11 is connected to the transmission gear 15, and the second coupler 50 couples the inner ring gear set 11 with the sun gear assembly 12. The engine 30 is started, and the power of the engine 30 is transmitted to the inner ring gear set 11 and the planetary gear 13 assembly through the planetary carrier 14 and the planetary gear 13. The inner ring gear set 11 transmits power through the transmission gear 15, and the transmission gear 15 transmits power to the first differential 60. The first differential 60 transmits power to the first axle 100 to drive the first axle 100 to move. The sun gear assembly 12 transmits power to the first motor 20, so that the first motor 20 charges the battery 90, and the battery 90 supplies power to the second motor 80. The second motor 80 is started, and the power of the second motor 80 is transmitted to the second axle 110 through the second differential 70 to drive the second axle 110 to move, thereby realizing the second four-wheel drive mode.

[0051] The present application utilizes a planetary gear mechanism 10, a first coupler 40, and a second coupler 50 to implement EV drive, a first series mode, a second series mode, a first engine start mode, a second engine start mode, an ECVT mode, a braking capacity recovery mode, an engine drive mode, a first four-wheel drive mode, and a second four-wheel drive mode. The drive mode can be switched simply by disconnecting or connecting the first coupler 40 and the second coupler 50, making mode switching simple. Furthermore, the absence of synchronizers, shift hubs, shift motors, and other mechanisms makes the overall structure of the hybrid drive system more compact, simplifies the system, reduces costs, and shortens the axial dimension of the hybrid drive system, facilitating layout and mounting.

[0052] In some embodiments, the first coupler 40 may be a one-way clutch or a magnetic clutch with a one-way locking function or a two-position off-on power coupling device. The second coupler 50 may be a three-position power coupling device such as a bilateral synchronizer or a three-position electromagnetic clutch.

[0053] Combine Figure 1 In some embodiments, in order to achieve the connection or disconnection between the inner ring gear set 11, the sun gear assembly 12 and the transmission housing, the second coupler 50 includes: a first connection part 51, a second connection part 52 and a third connection part 53. The first connection part 51 is connected to the inner ring gear set 11 and can be switched between a first position, a second position and a third position. The second connection part 52 is connected to the sun gear assembly 12. The third connection part 53 is connected to the transmission housing. When the first connection part 51 is in the first position, the first connection part 51 is connected to the third connection part 53; when the first connection part 51 is in the second position, the first connection part 51 is disconnected from the third connection part 53 and the second connection part 52; when the first connection part 51 is in the third position, the first connection part 51 is connected to the second connection part 52.

[0054] When the first connecting portion 51 is in the first position, the first connecting portion 51 is engaged with the third connecting portion 53 and disconnected from the second connecting portion 52. At this point, the internal gear assembly 11 is connected to the transmission housing, but disconnected from the sun gear assembly 12. When the first connecting portion 51 is in the second position, the first connecting portion 51 is disconnected from the third connecting portion 53 and the second connecting portion 52. At this point, the internal gear assembly 11 is disconnected from both the transmission housing and the sun gear assembly 12. When the first connecting portion 51 is in the third position, the first connecting portion 51 is engaged with the second connecting portion 52. At this point, the internal gear assembly 11 is connected to the sun gear assembly 12, but disconnected from the transmission housing.

[0055] A hybrid drive system operating state table, wherein 0 represents disconnection, 1 represents engagement, off represents shutdown, and on represents start.

[0056]

[0057]

[0058] In combination Figure 1 In some embodiments, in order to realize power transmission, the sun gear assembly 12 comprises a sun gear 121 and a first connecting shaft 122. The sun gear 121 is located at the center of the inner ring gear set 11 and is engaged with the plurality of planetary gears 13. One end of the first connecting shaft 122 is connected with the sun gear 121, and the other end is connected with the first motor 20. The first connecting shaft 122 is arranged in parallel with the first wheel shaft 90, and the first connecting shaft 122 is connected with the second connecting part 52.

[0059] The sun gear 121 can transmit power to the first motor 20 through the first connecting shaft 122, and the power of the first motor 20 can also be transmitted to the sun gear 121 through the first connecting shaft 122.

[0060] In combination Figure 1 In some embodiments, in order to realize power transmission, the inner ring gear set 11 comprises an inner ring gear 111 and an inner ring gear shaft 112. The inner ring gear 111 is engaged with the plurality of planetary gears 13 and is connected with the first coupling 40. The inner ring gear shaft 112 is connected with the inner ring gear 111 and is connected with the first connecting part 51.

[0061] When the first connecting part 51 is located at the first position, the first connecting part 51 is combined with the third connecting part 53, and the first connecting part 51 is disconnected with the second connecting part 52. At this time, the inner ring gear shaft 112 makes the inner ring gear 111 connected with the transmission case, and the inner ring gear shaft 112 makes the inner ring gear 111 not connected with the sun gear assembly 12. When the first connecting part 51 is located at the second position, the first connecting part 51 is disconnected with the third connecting part 53 and the second connecting part 52. At this time, the inner ring gear shaft 112 makes the inner ring gear 111 not connected with the transmission case and the sun gear assembly 12. When the first connecting part 51 is located at the third position, the first connecting part 51 is combined with the second connecting part 52. At this time, the inner ring gear shaft 112 makes the inner ring gear 111 connected with the sun gear assembly 12, and the inner ring gear shaft 112 makes the inner ring gear 111 not connected with the transmission case.

[0062] In combination Figure 1 In some embodiments, in order to realize power transmission, the first differential 60 is provided with a first main reduction driven gear 61, and the first main reduction driven gear 61 is drivingly connected with the transmission gear 15 through the first reduction gear mechanism 120.

[0063] When the engine 30 transmits power to the first differential 60 , the power of the transmission gear 15 can be transmitted to the first main reduction driven gear 61 through the first reduction gear mechanism 100 , and the first main reduction driven gear 61 transmits the power to the first axle 100 through the first differential 60 .

[0064] Combine Figure 1 In some embodiments, to achieve power transmission, the first reduction gear mechanism 120 includes a first intermediate shaft 1201. One end of the first intermediate shaft 1201 is provided with a first intermediate shaft gear 1202 that meshes with the transmission gear 15, and the other end is provided with a first main reduction driving gear 1203 that meshes with the first main reduction driven gear 61. The first intermediate shaft 1201 is arranged parallel to the first axle 100.

[0065] When the engine 30 transmits power to the first differential 60, the transmission gear 15 can transmit the power to the first intermediate shaft 1201 through the first intermediate shaft gear 1202. The first intermediate shaft 1201 drives the first main reducer driving gear 1203 to rotate. The first main reducer driving gear 1203 drives the first main reducer driven gear 61 to rotate. The first main reducer driven gear 61 transmits the power to the first wheel axle 100 through the first differential 60 to drive the vehicle.

[0066] Combine Figure 1 In some embodiments, in order to achieve power transmission, the second differential 70 is provided with a second main reduction driven gear 71 , and the second main reduction driven gear 71 is connected to the second motor 80 via a second reduction gear mechanism 130 .

[0067] When the second motor 80 transmits power to the second differential 70 , the power of the second motor 80 can be transmitted to the second main reduction driven gear 71 through the second reduction gear mechanism 130 , and the second main reduction driven gear 71 transmits power to the second axle 110 through the second differential 70 .

[0068] Combine Figure 1 In some embodiments, to achieve power transmission, the second reduction gear mechanism 130 includes a second intermediate shaft 1301. A second intermediate shaft gear 1302 is provided at one end of the second intermediate shaft 1301, and a second main reduction driving gear 1303 is provided at the other end, meshing with the second main reduction driven gear 71. The second intermediate shaft is disposed parallel to the second axle 110. The hybrid drive system further includes a second connecting shaft 81 connected to the second motor 80. The second connecting shaft 81 is provided with a connecting gear 82 meshing with the second intermediate shaft gear 1303. The second connecting shaft 81 is disposed parallel to the second intermediate shaft 1301.

[0069] When the second motor 80 transmits power to the second differential 70, the second motor 80 can transmit power to the second intermediate shaft 1301 through the second connecting shaft 81, the connecting gear 82, the second intermediate shaft gear 1302, drive the second main reduction driving gear 1303 to rotate, drive the second main reduction driven gear 71 to rotate, and the second main reduction driven gear 71 transmits power to the second axle 110 through the second differential 70 to drive the vehicle to travel.

[0070] Of course, when EV rear-drive braking energy recovery is performed, the second axle 110 drives the second motor 80 through the second differential 70, the second main reduction driven gear 71, the second main reduction driving gear 1303, the second intermediate shaft 1301, the second intermediate shaft gear 1302, the connecting gear 82, and the second connecting shaft 81, so that the second motor 80 can charge the battery 90.

[0071] In combination Figure 1 In some embodiments, in order to realize the power output or start of the engine 30, the hybrid power driving system further comprises a third connecting shaft 140 and a torsional damper 150. The third connecting shaft 140 is connected with the planetary carrier 14. The torsional damper 150 is connected with the fourth connecting shaft and the crankshaft 31 of the engine 30.

[0072] The power of the engine 30 can be transmitted to the third connecting shaft 140 through the crankshaft 31, and the third connecting shaft 140 can transmit the power to the planetary carrier 14. The planetary carrier 14 can transmit the power to the engine 30 through the third connecting shaft 140 and the crankshaft 31.

[0073] The crankshaft 31 of the engine 30 produces periodic torsional vibration under the action of combustion explosion and reciprocating inertia force, and if it is directly transmitted to the fourth connecting shaft 110, it will cause gear meshing impact, transmission belt flutter or motor rotor resonance. In combination Figure 1 In some embodiments, in order to improve the NVH (Noise, Vibrati1, Harshness) performance, the fourth connecting shaft 110 is connected with the crankshaft 31 through the torsional damper 120, which absorbs vibration energy through elastic elements (such as rubber, spring) and damping elements (such as silicone oil), attenuates the torsional vibration amplitude to the allowable range, improves the NVH, and at the same time, through elastic buffering and damping attenuation, the torque transmission is smoother, and the impact and jerk are reduced.

[0074] Based on the same inventive concept, the application further provides a vehicle adopting the hybrid power drive system, the specific structure of which is referred to the above embodiments, and thus has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0075] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and thus cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0076] In the description of the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. "Below", "under" and "underneath" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0077] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like 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 application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0078] Although the preferred embodiments of the present application have been described, those of ordinary skill in the art can make additional changes and modifications to the embodiments once they have been informed of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0079] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A hybrid drive system, characterized in that: include: A planetary gear mechanism comprising an inner ring gear set, a sun gear assembly located at the center of the inner ring gear set, a plurality of planetary gears meshed between the inner ring gear set and the sun gear assembly, and a planetary gear carrier rotatably connecting the plurality of planetary gears; a first motor connected to the sun gear assembly; an engine connected to the planetary wheel carrier; a first coupler connected to the inner ring gear set and the transmission gear to couple or disconnect the inner ring gear set with the transmission gear; a second coupler connected to the inner ring gear set, the sun gear assembly, and the transmission housing to couple or disconnect the inner ring gear set with the sun gear assembly and the transmission housing; a first differential, drivingly connected to the transmission gear and connected to the first wheel axle; a second differential connected to the second wheel axle; a second motor, drivingly connected to the second differential; A battery is electrically connected to the first motor and the second motor.

2. The hybrid drive system according to claim 1, characterized in that: The second coupler comprises: a first connecting portion connected to the inner gear ring assembly and capable of switching between a first position, a second position, and a third position; a second connecting portion connected to the sun gear assembly; a third connecting portion connected to the gearbox housing; In which, when the first connection part is located at the first position, the first connection part is combined with the third connection part; when the first connection part is located at the second position, the first connection part is disconnected from the third connection part and the second connection part; when the first connection part is located at the third position, the first connection part is combined with the second connection part.

3. The hybrid drive system according to claim 2, characterized in that: The sun gear assembly comprises: a sun gear located at the center of the inner ring gear set and meshing with the plurality of planetary gears; a first connecting shaft, one end of which is connected to the sun gear, and the other end of which is connected to the first motor; Wherein, the first connecting shaft is arranged parallel to the first wheel axle, and the first connecting shaft is connected to the second connecting portion.

4. The hybrid drive system according to claim 2, characterized in that: The inner ring gear assembly comprises: an inner ring gear meshing with the plurality of planetary gears and connected to the first coupler; The inner gear ring shaft is connected to the inner gear ring and to the first connecting portion.

5. The hybrid drive system according to any one of claims 1 to 4, characterized in that: The first differential is provided with a first main reduction driven gear, and the first main reduction driven gear is transmission-connected to the transmission gear via a first reduction gear mechanism.

6. The hybrid drive system according to claim 5, characterized in that: The first reduction gear mechanism comprises: a first intermediate shaft, one end of which is provided with a first intermediate shaft gear meshing with the transmission gear, and the other end of which is provided with a first main reducer driving gear meshing with the first main reducer driven gear; Wherein, the first intermediate shaft is arranged parallel to the first wheel axle.

7. The hybrid drive system according to any one of claims 1 to 4, characterized in that: The second differential is provided with a second main reduction driven gear, and the second main reduction driven gear is transmission-connected to the second motor via a second reduction gear mechanism.

8. The hybrid drive system according to claim 7, characterized in that: The second reduction gear mechanism comprises: a second intermediate shaft having a second intermediate shaft gear at one end and a second main reducer driving gear meshing with the second main reducer driven gear at the other end; Among them, the second intermediate shaft is arranged parallel to the second wheel axle, and the hybrid drive system also includes a second connecting shaft connected to the second motor, the second connecting shaft is provided with a connecting gear meshing with the second intermediate shaft gear, and the second connecting shaft is arranged parallel to the second intermediate shaft.

9. The hybrid drive system according to any one of claims 1 to 4, characterized in that: The hybrid drive system further includes: a third connecting shaft connected to the planetary wheel carrier; A torsional vibration damper is connected to the fourth connecting shaft and the crankshaft of the engine.

10. A vehicle, characterized in that: Comprising a hybrid drive system as described in any one of claims 1-9.

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