Power assembly and vehicle

Abstract

The utility model relates to a power assembly and a vehicle. The power assembly comprises an engine, a first motor, a planetary gear set, a first driving shaft, a first locking mechanism and a second locking mechanism. An output shaft of the engine is connected with a planet carrier of the planetary gear set; a main shaft of the first motor is connected with a sun gear of the planetary gear set; a gear ring of the planetary gear set is connected with the first driving shaft; the first driving shaft is suitable for being connected with a first wheel; the first locking mechanism is used for selectively locking the planet carrier on a first static component or releasing the locking between the planet carrier and the first static component; and the second locking mechanism is used for selectively locking the main shaft on a second static part or releasing the locking of the main shaft and the second static part. When the power is insufficient, the first wheel can be directly driven by the engine, so that the intermediate link of torque transmission can be reduced, and the energy loss is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the automobile manufacturing technical field especially, it relates to a kind of power assembly and vehicle. BACKGROUND

[0002] In the case of power shortage, the engine needs to drive the first motor to generate electricity, and then the electricity generated by the first motor needs to be converted by the inverter to supply the second motor, and then the second motor drives the wheel to rotate, that is, the driving force of the engine needs to pass through the first motor, the inverter and the second motor to be transmitted to the wheel end, which will result in low energy application efficiency, and about 15% energy loss will occur during actual operation. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem: in the case of power shortage, the driving force of the engine needs to pass through the first motor, the inverter and the second motor to be transmitted to the wheel end, which results in low energy application efficiency, and provides a power assembly, a vehicle and a vehicle control method.

[0004] To solve the above problems, on the one hand, the utility model provides a kind of power assembly, including engine, first motor, planetary gear set, first drive shaft, first locking mechanism and second locking mechanism;The output shaft of the engine is connected with the planet carrier of the planetary gear set;The main shaft of the first motor is connected with the sun gear of the planetary gear set;The gear ring of the planetary gear set is connected with the first drive shaft;The first drive shaft is suitable for connecting first wheel;The first locking mechanism is used to selectively lock the planet carrier on the first stationary part or release the lock between the planet carrier and the first stationary part;The second locking mechanism is used to selectively lock the main shaft on the second stationary part or release the lock between the main shaft and the second stationary part.

[0005] Optionally, the power assembly further includes a first transmission mechanism, the output shaft is connected to the planet carrier through the first transmission mechanism;The first transmission mechanism includes a first gear assembly and a selection unit;The first gear assembly includes a first driving wheel and a first driven wheel, the first driving wheel is connected to the output shaft, and the first driven wheel is connected to the planet carrier;The selection unit connects the first driving wheel and the output shaft, and the selection unit has switchable first state and second state;When the selection unit is in the first state, the first driving wheel is separated from the output shaft;When the selection unit is in the second state, the first driving wheel is combined with the output shaft through the selection unit.

[0006] Optionally, the first transmission mechanism further comprises a second gear assembly, the second gear assembly comprising a second driving wheel and a second driven wheel, the second driving wheel being connected to the output shaft, the first driven wheel being connected to the planet carrier; when the selection unit is in the first state, the second driving wheel is combined with the output shaft through the selection unit; when the selection unit is in the second state, the second driving wheel is separated from the output shaft.

[0007] Optionally, the first locking mechanism comprises a first driving part and a first locking part, the first driving part being connected to the first locking part, for driving the first locking part to approach or move away from the first driving wheel; when the first locking part approaches the first driving wheel, the first locking part can be combined with the first driving wheel to lock the planet carrier; when the first locking part moves away from the first driving wheel, the first locking part can be separated from the first driving wheel to unlock the planet carrier.

[0008] Optionally, the power assembly further comprises a second motor and a second drive shaft, the second motor being electrically connected to the first motor, a motor shaft of the second motor being connected to the second drive shaft, the second drive shaft being adapted to connect a second wheel; wherein one of the first wheel and the second wheel is a front wheel, and the other is a rear wheel.

[0009] Optionally, the power assembly has a first direct drive mode and a second direct drive mode; when the power assembly is in the first direct drive mode, the first locking mechanism unlocks the planet carrier, the second locking mechanism locks the main shaft, the selection unit is in the first state, the engine is working, the first motor is not working, and the second motor is not working; when the power assembly is in the second direct drive mode, the first locking mechanism unlocks the planet carrier, the second locking mechanism locks the main shaft, the selection unit is in the second state, the engine is working, the first motor is not working, and the second motor is not working, and the power assembly enters the second direct drive mode.

[0010] Optionally, the power assembly has a first power split mode, a second power split mode and a parallel mode; when the power assembly is in the first power split mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the first state or the second state, the engine works to drive the first motor to generate electricity, and the second motor is driven; when the power assembly is in the second power split mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the first state or the second state, the engine works to drive the first motor to generate electricity, and the second motor is not driven; when the power assembly is in the parallel mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism locks the main shaft, the selection unit is in the first state or the second state, the engine works, the first motor is not driven, and the second motor is driven.

[0011] Optionally, when the power assembly is in the first pure electric mode, the first locking mechanism locks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in a third state, the engine is not driven, the first motor is driven, and the second motor is driven; when the selection unit is in the third state, the first driving wheel is separated from the output shaft, and the second driving wheel is separated from the output shaft; when the power assembly is in the second pure electric mode, the first locking mechanism locks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the third state, the engine is not driven, the first motor is driven, and the second motor is not driven; when the power assembly is in the third pure electric mode, the first locking mechanism locks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the third state, the engine is not driven, the first motor is not driven, and the second motor is driven.

[0012] Optionally, when the power assembly is in the first energy recovery mode, the first locking mechanism unlocks the planetary carrier, the selection unit is in the third state, the engine is not driven, the first motor is not driven, and the second motor generates electricity; when the selection unit is in the third state, the first driving wheel is separated from the output shaft, and the second driving wheel is separated from the output shaft; when the power assembly is in the second energy recovery mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the third state, the engine is not driven, the first motor generates electricity, and the second motor is not driven.

[0013] Optionally, the output shaft and the axis of the planetary gear set are spaced apart in the radial direction of the output shaft; and the power assembly further comprises a first transmission mechanism, and the output shaft is connected to the carrier through the first transmission mechanism.

[0014] Optionally, the side surface of the main shaft is provided with a locking hole; the second locking mechanism comprises a second driving part and a second locking part; the second driving part is connected to the second locking part and is used for driving the second locking part to approach or move away from the main shaft; when the first locking part approaches the main shaft, the first locking part can extend into the locking hole to lock the main shaft; when the first locking part moves away from the main shaft, the first locking part can exit the locking hole to unlock the main shaft.

[0015] Optionally, the main shaft is sleeved on the first driving shaft.

[0016] Optionally, the power assembly further comprises a second motor, a second driving shaft and a clutch device; the motor shaft of the second motor is connected to the second driving shaft; the second driving shaft is adapted to be connected to a second wheel; one of the first wheel and the second wheel is a front wheel, and the other is a rear wheel; the output shaft is connected to the carrier through the clutch device; the clutch device comprises a driving part and a driven part; the driving part is connected to the output shaft, and the driven part is connected to the carrier; the clutch device has a combined state and a separated state which can be switched; when the clutch device is in the combined state, the driving part is combined with the driven part, so that the torque of the output shaft can be transmitted to the carrier; when the clutch device is in the separated state, the driving part and the driven part are separated, so that the torque of the output shaft is prevented from being transmitted to the carrier.

[0017] To solve the above problems, in one aspect, the utility model provides a kind of vehicle, including the power assembly of any one described above.

[0018] In the power assembly and vehicle provided by the embodiment of the utility model, when power is insufficient, the first wheel can be directly driven by the engine, so that the intermediate link of torque transmission can be reduced, and energy loss can be further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic view of the power assembly provided by an embodiment of the utility model;

[0020] Figure 2 It is the structure schematic view of the power assembly provided by another embodiment of the utility model;

[0021] Figure 3 It is a kind of vehicle control method provided by an embodiment of the utility model;

[0022] Figure 4Is another vehicle control method provided by one embodiment of the utility model.

[0023] The reference signs in the specification are as follows:

[0024] 10, power assembly; 20, first wheel; 30, second wheel; 40, battery;

[0025] 1, engine; 11, output shaft;

[0026] 2, first motor; 21, main shaft; 211, locking hole; 22, locking block;

[0027] 3, planetary gear set; 31, planet carrier; 32, sun gear; 33, ring gear;

[0028] 4, first drive shaft;

[0029] 5, first locking mechanism; 51, first driving part; 52, first locking part;

[0030] 6, second locking mechanism; 61, second driving part; 62, second locking part;

[0031] 7, first transmission mechanism; 71, first gear assembly; 711, first driving wheel; 712, first driven wheel; 72, selection unit; 73, second gear assembly; 731, second driving wheel; 732, second driven wheel;

[0032] 81, second motor; 82, second drive shaft; 83, second transmission mechanism; 831, first gear; 832, second gear; 833, third gear; 834, fourth gear;

[0033] 91, first differential; 92, second differential. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clearly understood, the utility model is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0035] As Figure 1As shown, in an embodiment, the powertrain 10 comprises an engine 1, a first electric machine 2, a planetary gear set 3, a first drive shaft 4, a first locking mechanism 5 and a second locking mechanism 6; wherein an output shaft 11 of the engine 1 is connected with a carrier 31 of the planetary gear set 3; a main shaft 21 of the first electric machine 2 is connected with a sun gear 32 of the planetary gear set 3; a ring gear 33 of the planetary gear set 3 is connected with the first drive shaft 4; the first drive shaft 4 is adapted to be connected with a first wheel 20; the first locking mechanism 5 is used to selectively lock the carrier 31 on a first stationary component or to unlock the carrier 31 from the first stationary component; the second locking mechanism 6 is used to selectively lock the main shaft 21 on a second stationary component or to unlock the main shaft 21 from the second stationary component.

[0036] The first stationary component can be a vehicle body, or the first stationary component can also be an object mounted on the vehicle body and capable of being stationary relative to the vehicle body, such as a reducer housing, a housing of the engine 1 or a housing of the first electric machine 2, etc. The planetary gear set 3 can be mounted in the reducer housing.

[0037] The second stationary component can be a vehicle body, or the second stationary component can also be an object mounted on the vehicle body and capable of being stationary relative to the vehicle body, such as a reducer housing, a housing of the engine 1 or a housing of the first electric machine 2, etc. In addition, the first stationary component and the second stationary component can be the same object or different objects.

[0038] When the first locking mechanism 5 unlocks the carrier 31 from the first stationary component (hereinafter referred to as the first locking mechanism 5 unlocking the carrier 31), the carrier 31 is capable of rotating about the axis of the planetary gear set 3.

[0039] When the first locking mechanism 5 locks the carrier 31 on the first stationary component (hereinafter referred to as the first locking mechanism 5 locking the carrier 31), the carrier 31 is incapable of rotating about the axis of the planetary gear set 3, and at this time, the power of the engine 1 cannot be transmitted to the ring gear 33 and the sun gear 32.

[0040] When the second locking mechanism 6 unlocks the main shaft 21 from the second stationary component (hereinafter referred to as the second locking mechanism 6 unlocking the main shaft 21), the main shaft 21 is capable of rotating about its own axis, and at this time, the sun gear 32 is also capable of rotating about its axis.

[0041] When the second locking mechanism 6 locks the main shaft 21 on the second stationary component (hereinafter referred to as the second locking mechanism 6 locking the main shaft 21), the main shaft 21 is incapable of rotating about its own axis, and at this time, the sun gear 32 is also incapable of rotating about its axis.

[0042] In the present embodiment, when the first locking mechanism 5 unlocks the planet carrier 31 and the second locking mechanism 6 unlocks the main shaft 21, the torque of the engine 1 can be transmitted from the output shaft 11 to the planet carrier 31, then transmitted to the ring gear 33 through the planet gears of the planetary gear set 3, then transmitted to the first drive shaft 4 from the ring gear 33, and then transmitted to the first wheel 20, thereby driving the first wheel 20 to rotate about its own axis. Moreover, after the torque of the engine 1 is transmitted to the planet carrier 31, the torque can also be transmitted from the planet carrier 31 to the sun gear 32, then transmitted to the main shaft 21 from the sun gear 32, thereby driving the main shaft 21 to rotate, and at this time, the first motor 2 can generate electricity.

[0043] That is, when the first locking mechanism 5 unlocks the planet carrier 31 and the second locking mechanism 6 unlocks the main shaft 21, the torque of the engine 1 can be branched through the planetary gear set 3, and a part of the torque is used to drive the first wheel 20 to rotate, and the other part of the torque is used to drive the first motor 2 to generate electricity.

[0044] When the first locking mechanism 5 unlocks the planet carrier 31 and the second locking mechanism 6 locks the main shaft 21, the torque of the engine 1 can be transmitted from the output shaft 11 to the planet carrier 31, then transmitted to the ring gear 33 through the planet gears of the planetary gear set 3, then transmitted to the first drive shaft 4 from the ring gear 33, and then transmitted to the first wheel 20, thereby driving the first wheel 20 to rotate about its own axis. Moreover, after the torque of the engine 1 is transmitted to the planet carrier 31, the torque cannot drive the main shaft 21 to rotate, and at this time, the engine 1 can directly drive the first wheel 20. In the case of power failure, the engine 1 can directly drive the first wheel 20, thereby reducing the intermediate links of torque transmission, and further reducing energy loss.

[0045] When the first locking mechanism 5 locks the planet carrier 31 and the second locking mechanism 6 unlocks the main shaft 21, the first wheel 20 cannot be driven by the engine 1, and at this time, the first motor 2 can work and generate driving force, and the driving force can be transmitted from the main shaft 21 to the sun gear 32, then transmitted to the planet gears, then transmitted to the first drive shaft 4 through the ring gear 33, thereby driving the first wheel 20 to rotate.

[0046] It should be noted that the output shaft 11 can only belong to a part of the engine 1, or the output shaft 11 has a second part shaft independent of the engine 1 in addition to having a part (defined as a first part shaft) belonging to the engine 1, the first part shaft is connected to the second part shaft, and the two can be coaxially arranged, at this time, it is equivalent to lengthening the original output shaft (i.e. the first part shaft) of the engine.

[0047] The spindle 21 may belong to only a part of the first motor 2, or the spindle 21 may have a fourth part of the spindle independent of the first motor 2, in addition to having a part of the spindle belonging to the first motor 2 (defined as the third part of the spindle). The third part of the spindle and the fourth part of the spindle are connected and can be set coaxially. In this case, it is equivalent to lengthening the original spindle (i.e. the third part of the spindle) of the first motor 2.

[0048] like Figure 1 As shown, in one embodiment, the axis of the output shaft 11 and the axis of the planetary gear set are spaced apart in the radial direction of the output shaft 11, that is, the output shaft 11 and the planetary gear set are not coaxial; the powertrain 10 also includes a first transmission mechanism 7, through which the output shaft 11 is connected to the planet carrier 31. This can reduce the axial dimension of the powertrain 10 on the output shaft 11.

[0049] like Figure 1 As shown, in one embodiment, the first transmission mechanism 7 includes a first gear assembly 71 and a selection unit 72; the first gear assembly 71 includes a first driving gear 711 and a first driven gear 712, the first driving gear 711 is connected to the output shaft 11, and the first driven gear 712 is connected to the planetary carrier 31; the selection unit 72 connects the first driving gear 711 and the output shaft 11, and the selection unit 72 has a switchable first state and a second state; when the selection unit 72 is in the first state, the first driving gear 711 is separated from the output shaft 11; when the selection unit 72 is in the second state, the first driving gear 711 is engaged with the output shaft 11 through the selection unit 72.

[0050] When the first drive wheel 711 is separated from the output shaft 11, the torque output by the engine 1 cannot be transmitted to the first drive wheel 711. When the first drive wheel 711 is connected to the output shaft 11 through the selection unit 72, the torque output by the engine 1 can be transmitted to the first drive wheel 711 through the selection unit 72, and then transmitted to the first driven wheel 712 through the first drive wheel 711, and from the first driven wheel 712 to the planetary carrier 31.

[0051] The first driving wheel 711 and the first driven wheel 712 are gears, and the first driving wheel 711 and the first driven wheel 712 can be directly engaged, so that the torque on the first driving wheel 711 can be directly transmitted to the first driven wheel 712. Of course, when the first driving wheel 711 and the first driven wheel 712 are both gears, the first driving wheel 711 and the first driven wheel 712 can also not be directly engaged, and at this time the first gear set further includes an intermediate gear, which is arranged between the first driving wheel 711 and the first driven wheel 712. When working, the torque of the first driving wheel 711 is first transmitted to the intermediate gear, and then transmitted from the intermediate gear to the first driven wheel 712. In addition, the number of intermediate gears can be one, at which time the first driving wheel 711 and the first driven wheel 712 are engaged with the intermediate gear; or the number of intermediate gears can be multiple, and the torque of the first driving wheel 711 can be sequentially transmitted to the first driven wheel 712 through each intermediate gear in turn.

[0052] "Multiple" means greater than or equal to two, and the meaning of the term "multiple" is the same in each embodiment, which will not be repeated hereinafter.

[0053] In an embodiment, the first driving wheel 711 is sleeved on the output shaft 11, and the selection unit 72 can be a synchronizer, and the manner in which the synchronizer combines or separates the first driving wheel 711 and the output shaft 11 is known in the art.

[0054] In addition, the first driven wheel 712 and the planet carrier 31 can be fixedly connected, and the first driven wheel 712 and the planet carrier 31 are coaxially arranged, and can synchronously rotate around the axis of the first driven wheel 712.

[0055] As shown in FIG. 1, Figure 1 In an embodiment, the first transmission mechanism 7 further includes a second gear assembly 73, the second gear assembly 73 includes a second driving wheel 731 and a second driven wheel 732, the second driving wheel 731 is connected to the output shaft 11, and the second driven wheel 732 is connected to the planet carrier 31; when the selection unit 72 is in the first state, the second driving wheel 731 is combined to the output shaft 11 through the selection unit 72; when the selection unit 72 is in the second state, the second driving wheel 731 is separated from the output shaft 11.

[0056] When the second driving wheel 731 is separated from the output shaft 11, the torque output by the engine 1 cannot be transmitted to the second driving wheel 731. When the second driving wheel 731 is combined to the output shaft 11 through the selection unit 72, the torque output by the engine 1 can be transmitted to the second driving wheel 731 through the selection unit 72, and then transmitted to the second driven wheel 732 through the second driving wheel 731, and transmitted from the second driven wheel 732 to the planet carrier 31.

[0057] Both the second driving gear 731 and the second driven gear 732 are gears. They can be directly meshed, allowing the torque on the second driving gear 731 to be directly transmitted to the second driven gear 732. Alternatively, when both gears are present, they may not be directly meshed. In this case, the second gear set 73 also includes an intermediate gear positioned between the second driving gear 731 and the second driven gear 732. During operation, the torque of the second driving gear 731 is first transmitted to the intermediate gear, and then from the intermediate gear to the second driven gear 732. Furthermore, there can be one intermediate gear, in which case both the second driving gear 731 and the second driven gear 732 mesh with it; or there can be multiple intermediate gears, allowing the torque of the second driving gear 731 to be transmitted sequentially through each intermediate gear to the second driven gear 732.

[0058] When the engine 1 needs to output torque to the planetary carrier 31 through the first gear assembly 71, the selection unit 72 can be switched to the second state; when the engine 1 needs to output torque to the planetary carrier 31 through the second gear assembly 73, the selection unit 72 can be switched to the first state.

[0059] Furthermore, the gear ratio of the first gear assembly 71 and the gear ratio of the second gear assembly 73 can be different, allowing the engine 1 to achieve two-speed output. Of course, in some embodiments, the gear ratio of the first gear assembly 71 and the gear ratio of the second gear assembly 73 can be the same.

[0060] In one embodiment, the second drive wheel 731 is also loosely fitted on the output shaft 11, and the selection unit 72 is located between the first drive wheel 711 and the second drive wheel 731.

[0061] In addition, the selection unit 72 also has a third state. When the selection unit 72 is in the third state, the first drive wheel 711 is separated from the output shaft 11, and the second drive wheel 731 is separated from the output shaft 11. At this time, the torque of the engine 1 cannot be transmitted from the output shaft 11 to the first drive wheel 711 or the second drive wheel 731, and therefore cannot be transmitted to the planetary carrier 31.

[0062] like Figure 1 As shown, the first locking mechanism 5 includes a first driving part 51 and a first locking part 52. The first driving part 51 is connected to the first locking part 52 and is used to drive the first locking part 52 to approach or move away from the first driving wheel 711. When the first locking part 52 approaches the first driving wheel 711, it can engage with the first driving wheel 711 to lock the planet carrier 31. When the first locking part 52 moves away from the first driving wheel 711, it can disengage from the first driving wheel 711 to unlock the planet carrier 31.

[0063] That is, the first locking mechanism 5 achieves the locking of the carrier 31 by locking the first driving wheel 711, which is more convenient for the assembly of the power assembly 10.

[0064] The first locking portion 52 can be a tooth that can be engaged with the first driving wheel 711, and when the first locking portion 52 is close to the first driving wheel 711, the tooth can be engaged with the first driving wheel 711, thereby locking the first driving wheel 711.

[0065] In an embodiment, the first driving portion 51 can include a first electromagnetic unit and a first elastic unit, and the first locking portion 52 has a permanent magnetic unit. When the first electromagnetic unit is not powered, the first locking portion 52 is away from the first driving wheel 711 under the action of the first elastic unit, at this time, the first driving wheel 711 is not locked by the first locking portion 52, and can rotate around its own axis. When the first electromagnetic unit is powered, its magnetism can be the same as that of the first locking portion 52, thereby driving the first locking portion 52 to move to be close to the first driving wheel 711 until the first locking portion 52 locks the first driving wheel 711, and in this process, the first locking portion 52 can exert a force on the first elastic unit to make the first elastic unit elastically deform. After the first electromagnetic unit is subsequently powered off, the first locking portion 52 can be reset to be away from the first driving wheel 711 under the action of the deformation force of the first elastic unit, thereby making the first locking portion 52 disengage from the first driving wheel 711. In this embodiment, the first electromagnetic unit can be located on the side of the first locking portion 52 away from the first driving wheel 711, and the first elastic unit can be in contact with the side of the first locking portion 52 close to the first driving wheel 711.

[0066] In other embodiments, the first locking portion 52 can be close to and lock the first driving wheel 711 under the action of the first elastic unit when the first electromagnetic unit is not powered, and when the first electromagnetic unit is powered, it can drive the first locking portion 52 to move away from the first driving wheel 711 until the first driving wheel 711 is unlocked, in this process, the first locking portion 52 can exert a force on the first elastic unit to make the first elastic unit elastically deform, and after the first electromagnetic unit is subsequently powered off, the first locking portion 52 can be reset to be close to the first driving wheel 711 under the action of the deformation force of the first elastic unit, thereby making the first locking portion 52 lock the first driving wheel 711. In this embodiment, the first electromagnetic unit can be located on the side of the first locking portion 52 away from the first driving wheel 711, and the first elastic unit can be in contact with the side of the first locking portion 52 away from the first driving wheel 711.

[0067] The first drive unit 51 may be connected to the first stationary member. Furthermore, the first locking mechanism 5 may employ other existing designs to lock and unlock the planetary carrier 31. For example, the first locking mechanism 5 may be a corresponding brake in the prior art.

[0068] like Figure 1 As shown, in one embodiment, the spindle 21 has a locking hole 211 on its side; the second locking mechanism 6 includes a second driving part 61 and a second locking part 62; the second driving part 61 is connected to the second locking part 62 and is used to drive the second locking part 62 to approach or move away from the spindle 21; when the second locking part 62 approaches the spindle 21, it can extend into the locking hole 211 to lock the spindle 21; when the second locking part 62 moves away from the spindle 21, it can exit the locking hole 211 to unlock the spindle 21.

[0069] In one embodiment, the second driving part 61 may include a second electromagnetic unit and a second elastic unit, and the second locking part 62 has a permanent magnet unit. When the second electromagnetic unit is not energized, the second locking part 62 is in a state away from the main shaft 21 under the action of the second elastic unit. At this time, the second locking part 62 is located outside the locking hole 211, and the main shaft 21 is not locked by the second locking part 62, and can rotate around its own axis. When the second electromagnetic unit is energized, its magnetism may be the same as that of the second locking part 62, thereby driving the second locking part 62 to move closer to the main shaft 21 until the second locking part 62 extends into the locking hole 211. During this process, the second locking part 62 can apply force to the second elastic unit, causing the second elastic unit to undergo elastic deformation. After the second electromagnetic unit is de-energized, it can move away from the main shaft 21 under the action of the deformation force of the second elastic unit, and finally reset the second locking part 62, thereby disengaging the second locking part 62 from the main shaft 21. In this embodiment, the second electromagnetic unit may be located on the side of the second locking part 62 away from the main shaft 21, and the second elastic unit may be abutting the side of the second locking part 62 near the main shaft 21.

[0070] In other embodiments, when the second electromagnetic unit is not energized, the second locking part 62 is in a state of approaching and locking the main shaft 21 under the action of the second elastic unit (at this time, the second locking part 62 extends into the locking hole 211); and when the second electromagnetic unit is energized, it can drive the second locking part 62 to move away from the main shaft 21 until the main shaft 21 is unlocked. During this process, the second locking part 62 can apply force to the second elastic unit, causing the second elastic unit to undergo elastic deformation. After the second electromagnetic unit is de-energized, the second locking part 62 can be reset under the deformation force of the second elastic unit to approach the main shaft 21, thereby locking the main shaft 21. In this embodiment, the second electromagnetic unit can be located on the side of the second locking part 62 away from the main shaft 21, and the second elastic unit can be abutting against the side of the second locking part 62 away from the main shaft 21.

[0071] The second drive unit 61 may be connected to a corresponding support object. For example, the second drive unit 61 may be connected to a corresponding support object used to support and place the first motor 2.

[0072] Of course, the second locking mechanism 6 can also adopt other existing designs to lock and unlock the main shaft 21. For example, the second locking mechanism 6 can be a corresponding brake in the prior art.

[0073] like Figure 1 As shown, in one embodiment, a locking block 22 is provided on the spindle 21, and a locking hole 211 is provided on the locking block 22. The locking block 22 may be sleeved on the spindle 21, and the locking block 22 may be fixed to the spindle 21 by bolts or the like.

[0074] Of course, in other embodiments, the locking block 22 may not be provided. In this case, the locking hole 211 may be directly provided on the spindle 21.

[0075] like Figure 1 As shown, in one embodiment, the main shaft 21 is loosely fitted onto the first drive shaft 4, and the two can be coaxially arranged. In this case, the first motor 2 is also fitted onto the first drive shaft 4, and both ends of the first drive shaft 4 extend out of the first motor 2. This arrangement makes the entire powertrain 10 more integrated.

[0076] Of course, in other embodiments, the spindle 21 may not be mounted on the first drive shaft 4, and the spindle 21 and the first drive shaft 4 may be arranged side by side.

[0077] like Figure 1As shown, in one embodiment, the powertrain 10 further includes a second motor 81 and a second drive shaft 82; the second motor 81 is electrically connected to the first motor 2; the motor shaft of the second motor 81 is connected to the second drive shaft 82; the second drive shaft 82 is adapted to connect a second wheel 30; wherein, one of the first wheel 20 and the second wheel 30 is a front wheel, and the other of the first wheel 20 and the second wheel 30 is a rear wheel.

[0078] In this embodiment, the powertrain is a four-wheel drive system. The power from the engine 1 and / or the first motor 2 can drive the first wheel 20, and the power from the second motor 81 can drive the second wheel 30. Normally, the first wheel 20 is the front wheel, and the second wheel 30 is the rear wheel.

[0079] In addition, the second drive shaft 82 and the second wheel 30 can be coaxially arranged.

[0080] In addition, the second motor 81 is electrically connected to the first motor 2, so that the electrical energy generated when the first motor 2 generates electricity can be directly used to drive the second motor 81, and the electrical energy generated when the second motor 81 generates electricity can also be directly used to drive the first motor 2.

[0081] like Figure 1 As shown, in one embodiment, the motor shaft is loosely fitted onto the second drive shaft 82, and the two can be coaxially arranged. In this case, the second motor 81 is also fitted onto the second drive shaft 82, and both ends of the second drive shaft 82 extend out of the second motor 81. This arrangement can make the entire powertrain 10 more integrated.

[0082] like Figure 1 As shown, in one embodiment, the powertrain 10 further includes a second transmission mechanism 83, which is connected to the motor shaft of the second motor 81 and the second drive shaft 82.

[0083] Specifically, the second transmission mechanism 83 includes a first gear 831, a second gear 832, a third gear 833, a fourth gear 834, and a gear shaft. The first gear 831 is connected to the motor shaft and meshes with the second gear 832. Both the second gear 832 and the third gear 833 are connected to the gear shaft. The fourth gear 834 is connected to the second drive shaft 82 and meshes with the third gear 833. Furthermore, along the axial direction of the motor shaft, the first gear 831 is spaced between the third gear 833 and the fourth gear 834, and the second gear 832 is also spaced between the third gear 833 and the fourth gear 834.

[0084] Of course, in other embodiments, the third gear 833 and the fourth gear 834 may also be an integral structure.

[0085] Of course, in other embodiments, the motor shaft can also not be sleeved on the second drive shaft 82, and the motor shaft and the second drive shaft 82 can be arranged side by side.

[0086] In an embodiment, when the power assembly 10 includes the engine 1, the first motor 2, the planetary gear set 3, the first transmission mechanism 7, the first lock mechanism 5, the second lock mechanism 6, and the second motor 81, the power assembly 10 has at least one of a first direct drive mode, a second direct drive mode, a first power split mode, a second power split mode, a parallel mode, a first pure electric mode, a second pure electric mode, a third pure electric mode, a first energy recovery mode, and a second energy recovery mode.

[0087] When the power assembly is in the first direct drive mode, the first lock mechanism 5 unlocks the planet carrier 31, the second lock mechanism 6 locks the main shaft 21, the selection unit 72 is in the first state, the engine 1 is working, the first motor 2 is not working, and the second motor 81 is not working. The first motor 2 not working means that the first motor 2 is neither used for generating electricity nor used for driving. The second motor 81 not working means that the second motor 81 is neither used for generating electricity nor used for driving.

[0088] When the power assembly is in the second direct drive mode, the first lock mechanism 5 unlocks the planet carrier 31, the second lock mechanism 6 locks the main shaft 21, the selection unit 72 is in the second state, the engine 1 is working, the first motor 2 is not working, and the second motor 81 is not working.

[0089] When the power assembly is in the first power split mode, the first lock mechanism 5 unlocks the planet carrier 31, the second lock mechanism 6 unlocks the main shaft 21, the selection unit 72 is in the first state or the second state, the engine 1 is working to drive the first motor 2 to generate electricity, and the second motor 81 is driving.

[0090] When the first motor 2 generates electricity, the second lock mechanism 6 unlocks the main shaft 21, the first motor 2 does not provide power to the outside, the main shaft 21 of the first motor 2 can rotate under the action of an external force (such as the driving force of the engine 1 and / or the second motor 81), and the electricity generating circuit in which the first motor 2 is located is a closed loop, so that the electric energy generated by the first motor 2 can be output to the outside (such as to the battery to charge the battery).

[0091] In some scenarios, when the second lock mechanism 6 unlocks the main shaft 21, the first motor 2 does not provide power to the outside, and the main shaft 21 of the first motor 2 can rotate under the action of an external force, if the electricity generating circuit in which the first motor 2 is located is open, the first motor 2 can generate voltage but cannot output electric energy to the outside, so at this time the first motor 2 is also regarded as being in a non-working state. Whether the second motor 81 is in a generating state or a non-working state is also distinguished in this way.

[0092] In actual use, the first motor 2 and the second motor 81 can be in the power generation state at the same time, can be in the non-power generation state at the same time, or only one of them can be in the power generation state.

[0093] In addition, when the second locking mechanism 6 locks the main shaft 21, the first motor 2 is also in the non-working state.

[0094] When the power assembly is in the second power split mode, the first locking mechanism 5 unlocks the planet carrier 31, the second locking mechanism 6 unlocks the main shaft 21, the selection unit 72 is in the first state or the second state, the engine 1 works to drive the first motor 2 to generate power, and the second motor 81 is not working.

[0095] When the power assembly is in the parallel mode, the first locking mechanism 5 unlocks the planet carrier 31, the second locking mechanism 6 locks the main shaft 21, the selection unit 72 is in the first state or the second state, the engine 1 works, the first motor 2 is not working, and the second motor 81 is driven.

[0096] When the power assembly is in the first pure electric mode, the first locking mechanism 5 locks the planet carrier 31, the second locking mechanism 6 unlocks the main shaft 21, the selection unit 72 is in the third state, the engine 1 is not working, the first motor 2 is driven, and the second motor 81 is driven; when the selection unit 72 is in the third state, the first driving wheel 711 is separated from the output shaft 11, and the second driving wheel 731 is separated from the output shaft 11.

[0097] When the power assembly is in the second pure electric mode, the first locking mechanism 5 locks the planet carrier 31, the second locking mechanism 6 unlocks the main shaft 21, the selection unit 72 is in the third state, the engine 1 is not working, the first motor 2 is driven, and the second motor 81 is not working.

[0098] When the power assembly is in the third pure electric mode, the first locking mechanism 5 locks the planet carrier 31, the second locking mechanism 6 unlocks the main shaft 21, the selection unit 72 is in the third state, the engine 1 is not working, the first motor 2 is not working, and the second motor 81 is driven.

[0099] When the power assembly is in the first energy recovery mode, the first locking mechanism 5 unlocks the planet carrier 31, the second locking mechanism 6 unlocks the main shaft 21 (for reference, see the table below), the selection unit 72 is in the third state, the engine 1 is not working, the first motor 2 is not working (at this time, the power generation circuit in which the first motor 2 is located is disconnected), and the second motor 81 generates power. Of course, in this mode, the second locking mechanism 6 can also lock the main shaft 21.

[0100] When the powertrain is in the second energy recovery mode, the first locking mechanism 5 unlocks the planetary carrier 31, the second locking mechanism 6 unlocks the main shaft 21, the selection unit 72 is in the third state, the engine 1 does not work, the first motor 2 generates electricity, and the second motor 81 does not work (at this time, the power generation circuit of the second motor 81 is open).

[0101] In addition, the powertrain 10 can operate according to the logic in the table below.

[0102] like Figure 1 As shown, in one embodiment, the powertrain 10 further includes a first differential 91, with a gear ring connected to the input end of the first differential 91 and the output end of the first differential 91 connected to a first drive shaft; that is, the first drive shaft is connected to the gear ring via the first differential 91. It should be understood that the first drive shaft may include two half-shafts, both of which can be connected to the output end of the first differential 91, and both half-shafts are connected to a first wheel 20. The two wheels connected to these two half-shafts can be the left front wheel and the right front wheel, respectively.

[0103] like Figure 1 As shown, in one embodiment, the powertrain 10 further includes a second differential 92. The motor shaft is connected to the input end of the second differential 92, and the output end of the second differential 92 is connected to a second drive shaft. That is, the second drive shaft is connected to the motor shaft through the second differential 92. Specifically, the motor shaft is connected to the input end of the second differential 92 through a second transmission mechanism. It should be understood that the second drive shaft may include two half-shafts, both of which can be connected to the output end of the second differential 92. Each of these two half-shafts is connected to a second wheel 30. The two wheels connected to these two half-shafts may be the left rear wheel and the right rear wheel, respectively.

[0104] This utility model embodiment also provides a vehicle, which includes the powertrain 10 described in any of the above embodiments.

[0105] like Figure 2 As shown, the vehicle also has a battery 40, which is electrically connected to the first motor 2 and the second motor 81. The battery 40 can supply power to the first motor 2 and the second motor 81, and the first motor 2 and the second motor 81 can also charge the battery 40 when generating electricity, thereby storing the generated electrical energy in the battery 40.

[0106] It should be understood that the above-mentioned design can also be replaced in other ways, such as:

[0107] refer to Figure 2In other embodiments, the first transmission mechanism 7 can not include the second gear assembly 73, in which case the engine 1 only transmits torque to the carrier 31 through the first gear assembly 71. In addition, in this embodiment, the selection unit 72 can also be a clutch or the like.

[0108] In other embodiments, when the power assembly 10 includes the second motor 81 and the second drive shaft 82, the power assembly 10 can also include a clutch device 84 (refer to ​ ); wherein the clutch device 84 includes a driving part and a driven part, the driving part is connected with the output shaft, and the driven part is connected with the carrier 31; the clutch device 84 has a switchable combined state and a separated state; when the clutch device 84 is in the combined state, the driving part is combined with the driven part, so that the torque of the output shaft 11 can be transmitted to the carrier 31; when the clutch device 84 is in the separated state, the driving part and the driven part are separated to avoid the torque of the output shaft 11 being transmitted to the carrier 31.

[0109] Wherein the clutch device 84 can be a clutch independent of the selection unit 72, and the clutch can adopt an existing design. Alternatively, the clutch device 84 can also be the selection unit 72 described above.

[0110] When the clutch device 84 is the selection unit 72 described above, the clutch device 84 in the separated state means that the selection unit 72 is in the third state; when the clutch device 84 is the selection unit 72 described above, the clutch device 84 in the combined state can be that the selection unit 72 is in the first state or the second state.

[0111] The embodiment of the utility model further provides a vehicle control method, the vehicle control method is used for controlling the work of the vehicle with the above-mentioned power assembly 10, the vehicle control method includes controlling the vehicle to work in any one of direct drive mode and power split mode; wherein, when the vehicle works in the direct drive mode, the engine 1 works, the clutch device 84 is in the combined state, the first locking mechanism 5 unlocks the carrier 31, the second locking mechanism 6 locks the main shaft 21, and the first motor 2 does not work; when the vehicle works in the power split mode, the engine 1 works, the clutch device 84 is in the combined state, the first locking mechanism 5 unlocks the carrier 31, the second locking mechanism 6 unlocks the main shaft 21, and the first motor 2 generates electricity.

[0112] In an embodiment, the vehicle control method further includes controlling the vehicle to switch from the power split mode to the direct drive mode; wherein the step of controlling the vehicle to switch from the power split mode to the direct drive mode includes: S1, controlling the second motor 81 to work so as to drive the second wheel through the second motor 81; S2, controlling the clutch device 84 to switch from the combined state to the separated state; S3, controlling the second locking mechanism 6 to lock the main shaft 21; S4, controlling the clutch device 84 to switch from the separated state to the combined state.

[0113] When the clutch device 84 is switched to the disengaged state, the power of the engine 1 cannot be transmitted to the first wheels, and the vehicle will experience a power interruption. In the embodiment, before the clutch device 84 is switched to the disengaged state, the second motor 81 is controlled to work, so that the vehicle is powered by the second motor 81, thereby avoiding the power interruption of the vehicle after the clutch device 84 is switched to the disengaged state, and improving the safety of the vehicle driving.

[0114] In an embodiment, between the step of controlling the clutch device 84 to switch from the engaged state to the disengaged state and the step of controlling the second locking mechanism 6 to lock the main shaft 21 (i.e., between S2 and S3), there is further included: S5, controlling the main shaft 21 to decelerate to a first target speed.

[0115] That is, the first motor 2 is decelerated before the main shaft 21 of the first motor 2 is locked by the second locking mechanism 6, so as to reduce the speed of the main shaft 21, and then the second locking mechanism 6 is controlled to act to lock the main shaft 21 when the speed of the main shaft 21 is reduced to the first target speed. In this way, the components such as the main shaft 21 and the second locking mechanism 6 can be prevented from being damaged, and the service life of the power assembly 10 is improved.

[0116] The first target speed is usually 0 or close to 0. For example, the first target speed can be less than or equal to 10 revolutions per minute. Moreover, the smaller the speed of the main shaft 21, the more conducive to the locking of the main shaft 21 by the second locking mechanism 6.

[0117] In addition, the speed of the main shaft 21 can be detected by a corresponding angle sensor.

[0118] In an embodiment, when the vehicle works in the power split mode, the first motor 2 is in the power generation state, and the first motor 2 does not provide driving force to the outside, but the main shaft 21 of the first motor 2 rotates with the sun gear 32. At this time, the main shaft 21 of the first motor 2 is defined as forward rotation, and in order to reduce the speed of the first motor 2, the first motor 2 can be powered to generate driving force that can drive the main shaft 21 to rotate in the reverse direction, so that the main shaft 21 of the first motor 2 can be quickly reduced to the first target speed.

[0119] In an embodiment, between the step of controlling the second locking mechanism 6 to lock the main shaft 21 and the step of controlling the clutch device 84 to switch from the disengaged state to the engaged state (i.e., between S3 and S4), there is further included: S6, adjusting the speed of the output shaft so that the speed difference between the driving part and the driven part meets a first predetermined value.

[0120] That is, when the driving part and the driven part are combined, the rotational speed of the output shaft of the engine 1 is first adjusted so that the rotational speed difference between the driving part and the driven part meets the first predetermined value, thereby ensuring that the driving part and the driven part can be combined smoothly and avoiding damage to the clutch device 84 and other components caused by the combination of the driving part and the driven part.

[0121] The first predetermined value is usually 0 or close to 0. For example, the first predetermined value can be less than or equal to 10 revolutions per minute. Moreover, the closer the rotational speed of the driving part and the rotational speed of the driven part, the more conducive to the combination of the driving part and the driven part.

[0122] In addition, the rotational speed of the driving part and the rotational speed of the driven part can be detected by corresponding angle sensors.

[0123] In addition, after assembly, the driving part is usually rotated synchronously with the output shaft. At this time, the driving part can be fixed on the output shaft, or the driving part and the output shaft can also be power transmission through gear meshing and the like, thereby realizing synchronous movement. The driven part and the planet carrier 31 can be synchronously rotated. At this time, the driven part can be fixed on the planet carrier 31, or the driven part and the planet carrier 31 can also be power transmission through gear meshing and the like, thereby realizing synchronous movement.

[0124] In an embodiment, after the step of controlling the clutch device 84 to switch from the disengaged state to the engaged state (i.e., after S4), the vehicle control method further comprises: S7, controlling the second motor 81 to stop working. In this way, the second motor 81 will not provide driving force to the vehicle, thereby saving electric energy.

[0125] In an embodiment, the vehicle control method further comprises controlling the vehicle to switch from the direct drive mode to the power split mode.

[0126] The step of controlling the vehicle to switch from the direct drive mode to the power split mode comprises: S1', controlling the second motor 81 to work so as to drive the second wheels through the second motor 81; S2', controlling the clutch device 84 to switch from the engaged state to the disengaged state; S3', controlling the second locking mechanism 6 to unlock the main shaft 21; and S4', controlling the clutch device 84 to switch from the disengaged state to the engaged state.

[0127] In the embodiment, before the clutch device 84 switches to the disengaged state, the second motor 81 is first controlled to work so as to provide power to the vehicle through the second motor 81, thereby avoiding power interruption of the vehicle after the clutch device 84 switches to the disengaged state, and improving the safety of the vehicle in driving.

[0128] In one embodiment, between the step of controlling the second locking mechanism 6 to unlock the main shaft 21 and the step of controlling the clutch device 84 to switch from the disengaged state to the engaged state (i.e. between S3' and S4'), there is further included: S5', adjusting the rotational speed of the output shaft so that the rotational speed difference between the driving part and the driven part meets a second predetermined value.

[0129] This can ensure that the driving part and the driven part can be smoothly engaged, and avoid damage to the clutch device 84 and other components due to the engagement of the two.

[0130] The second predetermined value is usually 0 or close to 0. For example, the second predetermined value can be less than or equal to 10 revolutions per minute. Moreover, the closer the rotational speed of the driving part and the rotational speed of the driven part, the more conducive to the engagement of the two.

[0131] In addition, the second predetermined value and the first predetermined value can be the same or different.

[0132] The technical features of the above embodiments can be combined in any way. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present disclosure.

[0133] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A powertrain, characterized by, The power assembly comprises an engine, a first motor, a planetary gear set, a first drive shaft, a first locking mechanism and a second locking mechanism; An output shaft of the engine is connected with a planet carrier of the planetary gear set; A main shaft of the first motor is connected with a sun gear of the planetary gear set; A ring gear of the planetary gear set is connected with the first drive shaft; The first drive shaft is adapted to connect a first wheel; The first locking mechanism is used for selectively locking the planet carrier on a first stationary part or releasing the planet carrier from the first stationary part; The second locking mechanism is used for selectively locking the main shaft on a second stationary part or releasing the main shaft from the second stationary part.

2. The powertrain of claim 1, wherein, The power assembly further comprises a first transmission mechanism, and the output shaft is connected with the planet carrier through the first transmission mechanism; The first transmission mechanism comprises a first gear assembly and a selection unit; The first gear assembly comprises a first driving wheel and a first driven wheel, the first driving wheel is connected with the output shaft, and the first driven wheel is connected with the planet carrier; The selection unit is connected with the first driving wheel and the output shaft, and has a first state and a second state which are switchable; When the selection unit is in the first state, the first driving wheel is separated from the output shaft; When the selection unit is in the second state, the first driving wheel is combined with the output shaft through the selection unit.

3. The powertrain of claim 2, wherein, The first transmission mechanism further comprises a second gear assembly, the second gear assembly comprises a second driving wheel and a second driven wheel, the second driving wheel is connected with the output shaft, and the first driven wheel is connected with the planet carrier; When the selection unit is in the first state, the second driving wheel is combined with the output shaft through the selection unit; When the selection unit is in the second state, the second driving wheel is separated from the output shaft.

4. The powertrain of claim 3, wherein, The first locking mechanism comprises a first driving part and a first locking part, the first driving part is connected with the first locking part and is used for driving the first locking part to approach or move away from the first driving wheel; When the first locking part approaches the first driving wheel, the first locking part can be combined with the first driving wheel to lock the planet carrier; When the first locking part moves away from the first driving wheel, the first locking part can be separated from the first driving wheel to unlock the planet carrier.

5. The powertrain of claim 1, wherein, In the radial direction of the output shaft, the axis of the output shaft and the axis of the planetary gear set are arranged at intervals; The power assembly further comprises a first transmission mechanism, and the output shaft is connected with the planet carrier through the first transmission mechanism.

6. The powertrain of claim 1, wherein, A side surface of the main shaft is provided with a locking hole; The second locking mechanism comprises a second driving part and a second locking part; The second driving part is connected with the second locking part and is used for driving the second locking part to approach or move away from the main shaft; When the second locking part approaches the main shaft, the second locking part can extend into the locking hole to lock the main shaft; When the second locking part moves away from the main shaft, the second locking part can exit the locking hole to unlock the main shaft.

7. The powertrain of claim 1, wherein, The main shaft is sleeved on the first drive shaft.

8. The powertrain of any one of claims 1-7, wherein, The power assembly further comprises a second motor, a second drive shaft and a clutch device; The motor shaft of the second motor is connected with the second driving shaft; The second driving shaft is adapted to connect a second wheel; One of the first wheel and the second wheel is a front wheel, and the other is a rear wheel; The output shaft is connected with the planetary carrier through the clutch device; The clutch device comprises a driving part and a driven part, the driving part is connected with the output shaft, and the driven part is connected with the planetary carrier; the clutch device has a combined state and a separated state which can be switched; When the clutch device is in the combined state, the driving part is combined with the driven part, so that the torque of the output shaft can be transmitted to the planetary carrier; When the clutch device is in the separated state, the driving part and the driven part are separated to avoid the torque of the output shaft being transmitted to the planetary carrier.

9. The powertrain of claim 3, wherein, The power assembly further comprises a second motor and a second driving shaft, the second motor is electrically connected with the first motor, the motor shaft of the second motor is connected with the second driving shaft, and the second driving shaft is adapted to connect a second wheel; one of the first wheel and the second wheel is a front wheel, and the other is a rear wheel.

10. The powertrain of claim 9, wherein, The power assembly has a first direct drive mode and a second direct drive mode; When the power assembly is in the first direct drive mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism locks the main shaft, the selection unit is in the first state, the engine works, the first motor does not work, and the second motor does not work; When the power assembly is in the second direct drive mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism locks the main shaft, the selection unit is in the second state, the engine works, the first motor does not work, and the second motor does not work.

11. The powertrain of claim 9, wherein, The power assembly has a first power split mode, a second power split mode and a parallel mode; When the power assembly is in the first power split mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the first state or the second state, the engine works to drive the first motor to generate electricity, and the second motor drives; when the power assembly is in the second power split mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the first state or the second state, the engine works to drive the first motor to generate electricity, and the second motor does not work; When the power assembly is in the parallel mode, the first locking mechanism unlocks the planetary carrier, the second locking mechanism locks the main shaft, the selection unit is in the first state or the second state, the engine works, the first motor does not work, and the second motor drives.

12. The powertrain of claim 9, wherein, The power assembly has a first pure electric mode, a second pure electric mode and a third pure electric mode; When the power assembly is in the first pure electric mode, the first locking mechanism locks the planet carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the third state, the engine is not working, the first motor is driving, and the second motor is driving; when the selection unit is in the third state, the first driving wheel is separated from the output shaft, and the second driving wheel is separated from the output shaft; When the power assembly is in the second pure electric mode, the first locking mechanism locks the planet carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the third state, the engine is not working, the first motor is driving, and the second motor is not working; When the power assembly is in the third pure electric mode, the first locking mechanism locks the planet carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the third state, the engine is not working, the first motor is not working, and the second motor is driving.

13. The powertrain of claim 9, wherein, The power assembly has a first energy recovery mode and a second energy recovery mode; When the power assembly is in the first energy recovery mode, the first locking mechanism unlocks the planet carrier, the selection unit is in the third state, the engine is not working, the first motor is not working, and the second motor is generating electricity; when the selection unit is in the third state, the first driving wheel is separated from the output shaft, and the second driving wheel is separated from the output shaft; When the power assembly is in the second energy recovery mode, the first locking mechanism unlocks the planet carrier, the second locking mechanism unlocks the main shaft, the selection unit is in the third state, the engine is not working, the first motor is generating electricity, and the second motor is not working.

14. A vehicle characterized by comprising: The power assembly comprises the power assembly according to any one of claims 1 to 13.

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