Power driving system and vehicle

Abstract

The utility model belongs to the technical field of vehicle driving systems, and particularly relates to a power driving system and a vehicle, in the power driving system, a first combination device and a planetary assembly are connected between an engine and a first motor; the first combination device is connected with the planetary assembly, and power transmission is conducted among the engine, the first motor and the transmission assembly through the planetary assembly. The first combination device is used for controlling connection and disconnection between the first motor and / or the transmission assembly and the engine. The second motor is connected with the first gear set; the first gear set and / or the transmission assembly are / is used for transmitting driving force to the first driving shaft and / or the second driving shaft through the second combination device, and the second combination device is arranged between the first driving shaft and the second driving shaft and used for controlling combination or disconnection of the first driving shaft and the second driving shaft. According to the power driving system, the vehicle cost is reduced while the vehicle endurance and the power performance are guaranteed, and the economic performance of the vehicle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle drive systems, and particularly relates to a power drive system and a vehicle. Background Art

[0002] At present, a vehicle can achieve multiple driving modes through the combination of two or more power drive systems, so that the vehicle can cope with different working conditions. For example, some vehicles in the prior art include two power drive systems respectively for the front axle and the rear axle. One power drive system includes an engine and multiple motors, and the other power drive system also includes multiple motors. In order to achieve multiple driving modes, the total number of motors in the two power drive systems can even reach five or more. Since the cost of motors is relatively high, the more the total number of motors in the vehicle's power drive system, the higher the overall cost of the vehicle. Therefore, the excessive number of motors in the above solution will increase the vehicle cost and reduce the economic performance of the vehicle. Summary of the Utility Model

[0003] In view of the technical problem that the excessive number of motors in the vehicle power drive system in the prior art will increase the vehicle cost, etc., the utility model provides a power drive system and a vehicle.

[0004] An embodiment of the utility model provides a power drive system, which includes an engine, a first motor, a second motor, a planetary assembly, a first gear set, a first engaging device, a second engaging device, a transmission assembly, a first drive shaft and a second drive shaft; the first engaging device and the planetary assembly are connected between the engine and the first motor; the first engaging device is connected with the planetary assembly, and power is transmitted among the engine, the first motor and the transmission assembly through the planetary assembly; the first engaging device is used to control the on-off between the first motor and / or the transmission assembly and the engine;

[0005] The second motor is connected to the first gear set; the first gear set and / or the transmission assembly transmits driving force to the first drive shaft and / or the second drive shaft through the second engaging device. The second engaging device is arranged between the first drive shaft and the second drive shaft and is used to control the engagement or disengagement of the first drive shaft and the second drive shaft.

[0006] Another embodiment of the utility model further provides a vehicle, which includes the above-mentioned power drive system.

[0007] In the present utility model, when the first coupling device is disconnected and the second coupling device is coupled, the first coupling device controls the disconnection between the engine, the first motor and the transmission assembly. However, the power of the first motor can be transmitted to the transmission assembly through the planetary assembly. At this time, the first motor and the second motor can jointly drive the wheels to rotate, that is, the second motor drives the first drive shaft and / or the second drive shaft to rotate through the first gear set (or the first gear set and the second coupling device). At the same time, the power output by the first motor is sequentially transmitted to the first drive shaft and / or the second drive shaft through the planetary assembly and the transmission assembly (or the transmission assembly and the second coupling device), and then drives the wheels to rotate through the first drive shaft and / or the second drive shaft. At this time, the power drive system can realize the dual-motor drive mode of the first motor and the second motor. Moreover, in this state, the first motor can also generate electricity to realize braking energy recovery. At this time, the wheel braking force is transmitted to the first motor through the transmission assembly and the planetary assembly, and then the first motor is used to generate electricity to realize the braking energy recovery mode.

[0008] When both the first coupling device and the second coupling device are coupled, if the first coupling device controls the connection between the engine, the first motor and the transmission assembly, the second motor is connected to the first gear set, and the first gear set and the transmission assembly transmit the driving force to the first drive shaft and / or the second drive shaft through the second coupling device. At this time, the engine and the second motor can jointly drive the wheels to rotate, that is, the second motor drives the first drive shaft and / or the second drive shaft to rotate through the first gear set (or the first gear set and the second coupling device). At the same time, the power output by the engine can also be transmitted to the first drive shaft and / or the second drive shaft through the first coupling device, the planetary assembly and the transmission assembly (or the transmission assembly and the second coupling device), and then drives the wheels to rotate through the first drive shaft and / or the second drive shaft. At this time, the power drive system can realize the hybrid drive mode of the second motor and the engine. Moreover, in this state, the engine can also generate electricity for the first motor, that is, the power output by the engine is transmitted to the first motor through the first coupling device and the planetary assembly, and then the first motor is used to generate electricity. At this time, the power drive system can realize the range extender mode. Similarly, if the first coupling device only controls the connection between the engine and the first motor, the power drive system can realize the single-motor drive mode of the second motor and the range extender mode of generating electricity for the first motor.

[0009] When the first coupling device is coupled and the second coupling device is disconnected, the first coupling device controls the connection between the engine, the first motor and the transmission assembly. The engine can generate electricity for the first motor, that is, the power output by the engine is transmitted to the first motor through the first coupling device and the planetary assembly, and then the first motor is used to generate electricity. At this time, the power drive system can realize the range extender mode.

[0010] As described above, in the power drive system of the present utility model, only by switching the on-off states of the first coupling device and the second coupling device, the power drive system can achieve the above different modes (single-motor drive mode, dual-motor drive mode, hybrid mode, range-extending mode, energy recovery mode, etc.). In this way, the vehicle's endurance and power performance are ensured. At the same time, the vehicle of the present utility model only includes a set of power drive system, and the power drive system only includes two motors, namely the first motor and the second motor. In this way, while ensuring the vehicle's endurance and power performance, the number of the power drive system and the motors is reduced, thereby reducing the vehicle cost and improving the economic performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the power drive system provided by the first embodiment of the present utility model.

[0013] Figure 2 It is a schematic diagram of the power drive system provided by the second embodiment of the present utility model.

[0014] Figure 3 It is a schematic diagram of the power drive system provided by the third embodiment of the present utility model.

[0015] Figure 4 It is a schematic diagram of the power drive system provided by the fourth embodiment of the present utility model.

[0016] The reference numerals in the specification are as follows:

[0017] 1, engine; 2, first motor; 31, second motor; 32, third motor; 4, planetary assembly; 41, third sun gear; 42, third planet gear; 43, internal gear ring; 44, third planet carrier; 45, fourth planet carrier; 51, first gear set; 511, first sun gear; 512, first planet gear; 513, first planet carrier; 52, second gear set; 521, second sun gear; 522, second planet gear; 523, second planet carrier; 6, first coupling device; 61, first brake; 62, second brake; 63, third clutch; 64, fourth clutch; 7, transmission assembly; 71, output gear; 72, first transmission gear; 721, first master-slave gear; 722, second master-slave gear; 8, wheel; 9, second coupling device; 91, first clutch; 92, second clutch; 101, first drive shaft; 102, second drive shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the following further details the utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] It should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "middle", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0020] As Figures 1 to 4 shown, a power drive system provided by an embodiment of the present utility model includes an engine 1, a first motor 2, a second motor 31, a planetary assembly 4, a first gear set 51, a first engagement device 6, a second engagement device 9, a transmission assembly 7, a first drive shaft 101 and a second drive shaft 102; the first engagement device 6 and the planetary assembly 4 are connected between the engine 1 and the first motor 2; the first engagement device 6 is connected to the planetary assembly 4, and power is transmitted between the engine 1, the first motor 2 and the transmission assembly 7 through the planetary assembly 4; the first engagement device 6 is used to control the on / off of the first motor 2 and / or the transmission assembly 7 with the engine 1; the second motor 31 is connected to the first gear set 51; the first gear set 51 and / or the transmission assembly 7 transmits driving force to the first drive shaft 101 and / or the second drive shaft 102 through the second engagement device 9. The second engagement device 9 is provided between the first drive shaft 101 and the second drive shaft 102 and is used to control the engagement or disengagement of the first drive shaft 101 and the second drive shaft 102. It can be understood that the vehicle wheels 8 include a left wheel and a right wheel. The first drive shaft 101 can be connected to one of the left wheel or the right wheel, and the second drive shaft 102 is used to connect the other wheel of the vehicle's left and right wheels; no limitation is made here. However, in the embodiments of the present utility model, the case where the first drive shaft 101 is connected to the left wheel and the second drive shaft 102 is connected to the right wheel will be taken as an example for specific description.

[0021] In the above embodiments of the present utility model, when the first coupling device 6 is disconnected and the second coupling device 9 is coupled, the first coupling device 6 controls the disconnection between the engine 1, the first motor 2 and the transmission assembly 7, but the power of the first motor 2 can be transmitted to the transmission assembly 7 through the planetary assembly 4; at this time, the first motor 2 and the second motor 31 can jointly drive the wheel 8 to rotate, that is, the second motor 31 drives the first drive shaft 101 and / or the second drive shaft 102 to rotate through the first gear set 51 (or the first gear set 51 and the second coupling device 9); at the same time, the power output by the first motor 2 is sequentially transmitted to the first drive shaft 101 and / or the second drive shaft 102 through the planetary assembly 4 and the transmission assembly 7 (or the transmission assembly 7 and the second coupling device 9), and then drives the wheel 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102; at this time, the power drive system can realize the dual-motor drive mode of the first motor 2 and the second motor 31; and, in this state, the first motor 2 can also generate electricity to realize braking energy recovery. At this time, the braking force of the wheel 8 is transmitted to the first motor 2 through the transmission assembly 7 and the planetary assembly 4, and then the first motor 2 is used to generate electricity to realize the braking energy recovery mode.

[0022] When both the first coupling device 6 and the second coupling device 9 are coupled, if the first coupling device 6 controls the connection between the engine 1, the first motor 2 and the transmission assembly 7, and the second motor 31 is connected to the first gear set 51, and the first gear set 51 and the transmission assembly 7 transmit the driving force to the first drive shaft 101 and / or the second drive shaft 102 through the second coupling device 9, at this time, the engine 1 and the second motor 31 can jointly drive the wheel 8 to rotate, that is, the second motor 31 drives the first drive shaft 101 and / or the second drive shaft 102 to rotate through the first gear set 51 (or the first gear set 51 and the second coupling device 9); at the same time, the power output by the engine 1 can also be transmitted to the first drive shaft 101 and / or the second drive shaft 102 through the first coupling device 6, the planetary assembly 4 and the transmission assembly 7 (or the transmission assembly 7 and the second coupling device 9), and then drives the wheel 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102; at this time, the power drive system can realize the hybrid drive mode of the second motor 31 and the engine 1; and, in this state, the engine 1 can also generate electricity for the first motor 2, that is, the power output by the engine 1 is transmitted to the first motor 2 through the first coupling device 6 and the planetary assembly 4, and then the first motor 2 is used to generate electricity. At this time, the power drive system can realize the range extender mode. Similarly, if the first coupling device 6 only controls the connection between the engine 1 and the first motor 2, the power drive system can realize the single-motor drive mode of the second motor 31 and the range extender mode of generating electricity for the first motor 2.

[0023] When the first coupling device 6 is engaged and the second coupling device 9 is disengaged, the first coupling device 6 controls the connection between the engine 1, the first motor 2 and the transmission assembly 7. The engine 1 can generate electricity for the first motor 2. That is, the power output by the engine 1 is transmitted to the first motor 2 through the first coupling device 6 and the planetary assembly 4, thereby generating electricity for the first motor 2. At this time, the power drive system can achieve the range extender mode.

[0024] As described above, in the power drive system of the present utility model, only by switching the on / off states of the first coupling device 6 and the second coupling device 9, the power drive system can achieve the above different modes (single-motor drive mode, dual-motor drive mode, hybrid mode, range extender mode, energy recovery mode, etc.). In this way, the vehicle range and power performance are ensured. At the same time, the vehicle of the present utility model only includes a set of power drive system, and the power drive system only includes two motors, namely the first motor 2 and the second motor 31. In this way, while ensuring the vehicle range and power performance, the number of the power drive system and the motors is reduced, thereby reducing the vehicle cost and improving the economic performance of the vehicle.

[0025] In one embodiment, as Figure 1 and Figure 3 shown, the first gear set 51 is selectively connected to the first drive shaft 101 and / or the second drive shaft 102 through the second coupling device 9. At this time, the second coupling device 9 is used to control the on / off between the first gear set 51 and the first drive shaft 101 and / or the second drive shaft 102; the planetary assembly 4 is connected to the first drive shaft 101 or the second drive shaft 102 through the transmission assembly 7.

[0026] In this embodiment, as Figure 1 and Figure 3 shown, since the first gear set 51 is selectively connected to the first drive shaft 101 and / or the second drive shaft 102 through the second coupling device 9; therefore, when the first coupling device 6 is engaged, the first coupling device 6 controls the connection between the engine 1 and the transmission assembly 7, and when the second coupling device 9 is engaged, as Figure 1 and Figure 3As shown, the engine 1 and the second motor 31 jointly drive the wheel 8 to rotate. At this time, the second motor 31 drives the first drive shaft 101 and / or the second drive shaft 102 to rotate through the first gear set 51 and the second engaging device 9; at the same time, the power output by the engine 1 can also be transmitted to the first drive shaft 101 and / or the second drive shaft 102 in sequence through the first engaging device 6, the planetary assembly 4, and the transmission assembly 7, and then drive the wheel 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102; at this time, the power drive system can achieve a hybrid mode of hybrid drive of the second motor 31 and the engine 1; and, in this state, if the first engaging device 6 also controls the connection between the engine 1 and the first motor 2, the engine 1 can also generate electricity for the first motor 2, that is, the power output by the engine 1 is transmitted to the first motor 2 through the first engaging device 6 and the planetary assembly 4, and then generates electricity for the first motor 2. At this time, the power drive system can achieve an extended-range mode.

[0027] When the first engaging device 6 is disengaged and the second engaging device 9 is engaged, since the power of the first motor 2 can be transmitted to the transmission assembly 7 through the planetary assembly 4, the first motor 2 can jointly drive the wheel 8 to rotate with the second motor 31. At this time, the second motor 31 drives the first drive shaft 101 and / or the second drive shaft 102 to rotate through the first gear set 51 and the second engaging device 9; at the same time, the power output by the first motor 2 is transmitted to the first drive shaft 101 and / or the second drive shaft 102 in sequence through the planetary assembly 4 and the transmission assembly 7, and then drives the wheel 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102; at this time, the power drive system can achieve a dual-motor drive mode of the first motor 2 and the second motor 31; and, in this state, the first motor 2 can also generate electricity to achieve braking energy recovery. At this time, the braking force of the wheel 8 is transmitted to the first motor 2 through the transmission assembly 7 and the planetary assembly 4, and then generates electricity for the first motor 2 to achieve a braking energy recovery mode.

[0028] When the first engaging device 6 is engaged and the second engaging device 9 is disengaged, the engine 1 can generate electricity for the first motor 2, that is, the power output by the engine 1 is transmitted to the first motor 2 through the first engaging device 6 and the planetary assembly 4, and then generates electricity for the first motor 2. At this time, the power drive system can achieve an extended-range mode.

[0029] In one embodiment, as Figure 1 and Figure 3 shown, the transmission assembly 7 includes an output gear 71 and a first transmission gear 72; the second engaging device includes a first clutch 91 and a second clutch 92; the output gear 71 is installed on the planetary assembly 4, and the first transmission gear 72 is installed on the first drive shaft 101 or the second drive shaft 102 ( Figure 1 and Figure 3In the figure, it is installed on the second drive shaft 102 and meshes with the output gear 71; the first gear set 51 is connected to the first drive shaft 101 through the first clutch 91, and the first clutch 91 is used to control the connection and disconnection between the first gear set 51 and the first drive shaft 101; the first gear set 51 is connected to the second drive shaft 102 through the second clutch 92, and the second clutch 92 is used to control the connection and disconnection between the first gear set 51 and the second drive shaft 102.

[0030] In this embodiment, as Figure 1 and Figure 3 shown, the first clutch 91 is used to control the connection and disconnection between the first gear set 51 and the first drive shaft 101, while the second clutch 91 is used to control the connection and disconnection between the first gear set 51 and the second drive shaft 102. Therefore, in this embodiment, when both the first clutch 91 and the second clutch 92 are engaged, the power of the second motor 31 will be transmitted to the first clutch 91 and the second clutch 92 through the first gear set 51, and then drive the first drive shaft 101 and / or the second drive shaft 102 to drive the wheels 8 to rotate respectively; and the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 will also be transmitted to the first drive shaft 101 or the second drive shaft 102 through the first transmission gear 72, and then drive the wheels 8 to rotate.

[0031] When the first clutch 91 is engaged and the second clutch 92 is disengaged, the power of the second motor 31 will be transmitted to only the first clutch 91 through the first gear set 51, and then drive the first drive shaft 101 to drive the left wheel to rotate; and the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 will be transmitted to the second drive shaft 102 through the first transmission gear 72, and then drive the right wheel to rotate through the second drive shaft 102.

[0032] When the first clutch 91 is disengaged and the second clutch 92 is engaged, the power of the second motor 31 will be transmitted to only the second clutch 92 through the first gear set 51, and then drive the second drive shaft 102 to drive the right wheel to rotate; and the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 will be transmitted to the first drive shaft 101 or the second drive shaft 102 through the first transmission gear 72, and then drive the wheels 8 to rotate through the first drive shaft 101 or the second drive shaft 102.

[0033] When both the first clutch 91 and the second clutch 92 are disengaged, the power of the second motor 31 cannot be transmitted to the first drive shaft 101 and the second drive shaft 102. Therefore, the wheels 8 will not rotate due to the drive of the second motor 31. However, the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 will still be transmitted to the first drive shaft 101 or the second drive shaft 102 through the first transmission gear 72, and then drive the wheels 8 to rotate through the first drive shaft 101 or the second drive shaft 102.

[0034] In this embodiment, the content such as the power is reversely transmitted to the planetary assembly 4 through the transmission assembly 7 to achieve energy recovery can be referred to the above content and will not be elaborated here. In this embodiment, the structure of the transmission assembly 7 is simple and the manufacturing cost is low.

[0035] In one embodiment, as Figure 1 and Figure 3 shown, the first gear set 51 includes a first sun gear 511, a first planet gear 512 and a first planet carrier 513. The second motor 31 is connected to the first sun gear 511. The first planet gear 512 is rotatably mounted on the first planet carrier 513 and meshes with the first sun gear 511. The first planet carrier 513 is connected to the first clutch 91 and the second clutch 92. The first clutch 91 is used to control the on-off between the first planet carrier 513 and the first drive shaft 101, and the second clutch 92 is used to control the on-off between the first planet carrier 513 and the second drive shaft 102. It can be understood that the first clutch 91 has two engaging parts respectively mounted on the first planet carrier 513 and the first drive shaft 101. Similarly, the second clutch 92 has two engaging parts respectively mounted on the first planet carrier 513 and the second drive shaft 102.

[0036] In this embodiment, the second motor 31 drives the first sun gear 511 to rotate, the first sun gear 511 drives the first planet gear 512 to rotate, and the first planet gear 512 will drive the first planet carrier 513 to rotate. When the first clutch 91 is engaged, the first planet carrier 513 can drive the first drive shaft 101 to rotate through the first clutch 91. When the second clutch 92 is engaged, the first planet carrier 513 can drive the second drive shaft 102 to rotate through the second clutch 92. In this embodiment, the structure of the first gear set 51 is simple and occupies little space.

[0037] In one embodiment, the first gear set 51 includes a first sun gear 511, a second transmission gear (not shown in the figure), and a first rotating connecting member (not shown in the figure). The second motor 31 is connected to the first sun gear 511, and the first rotating connecting member is connected to the first clutch 91 and the second clutch 92; a first external gear surface is provided on the first rotating connecting member; the second transmission gear includes a first gear meshing with the first sun gear 511 and a second gear meshing with the first external gear surface, and the first gear and the second gear are coaxially connected by a second transmission shaft; the first clutch 91 is used to control the connection and disconnection between the first rotating connecting member and the first drive shaft 101, and the second clutch 92 is used to control the connection and disconnection between the first rotating connecting member and the second drive shaft 102. That is to say, in this embodiment, the first clutch 91 has two engaging portions respectively mounted on the first rotating connecting member and the first drive shaft 101; similarly, the second clutch 92 has two engaging portions respectively mounted on the first rotating connecting member and the second drive shaft 102.

[0038] In this embodiment, the second motor 31 drives the first sun gear 511 to rotate. The first sun gear 511 drives the first gear of the second transmission gear to rotate. The first gear will drive the second gear to rotate, and then drive the first rotating connecting member to rotate through the first external gear surface meshing with the second gear; at this time, when the first clutch 91 is engaged, the first rotating connecting member can drive the first drive shaft 101 to rotate through the first clutch 91; when the second clutch 92 is engaged, the first rotating connecting member can drive the second drive shaft 102 to rotate through the second clutch 92. In this embodiment, the structure of the first gear set 51 is simple and occupies little space.

[0039] In one embodiment, the second motor 31 is connected to the first drive shaft 101 or the second drive shaft 102 through the first gear set 51; the planetary assembly 4 is selectively connected to the first drive shaft 101 and / or the second drive shaft 102 through the transmission assembly 7 and the second engaging device 9.

[0040] In this embodiment, as Figure 2 and Figure 4 shown, since the second motor 31 is connected to the first drive shaft 101 or the second drive shaft through the first gear set 51; therefore, when the first engaging device 6 is disconnected and the second engaging device 9 is disconnected, the second motor 31 can only directly drive the first drive shaft 101 through the first gear set 51 (that is, the drive shaft connected to the first gear set 51. In this embodiment, the first drive shaft 101 connecting the left wheel is taken as an example for illustration. In the present invention, the first gear set 51 can also be connected to the second drive shaft 102 of the right wheel, which will not be elaborated here) to rotate, and then drive the left wheel to rotate through the first drive shaft 101; and since the second engaging device 9 is disconnected, the right wheel cannot rotate. Figure 2 and Figure 4 shown, since the second motor 31 is connected to the first drive shaft 101 or the second drive shaft through the first gear set 51; therefore, when the first engaging device 6 is disconnected and the second engaging device 9 is disconnected, the second motor 31 can only directly drive the first drive shaft 101 through the first gear set 51 (that is, the drive shaft connected to the first gear set 51. In this embodiment, the first drive shaft 101 connecting the left wheel is taken as an example for illustration. In the present invention, the first gear set 51 can also be connected to the second drive shaft 102 of the right wheel, which will not be elaborated here) to rotate, and then drive the left wheel to rotate through the first drive shaft 101; and since the second engaging device 9 is disconnected, the right wheel cannot rotate.

[0041] When the first coupling device 6 is coupled and the second coupling device 9 is coupled, the engine 1 can drive the wheel 8 to rotate together with the second motor 31. At this time, the second motor 31 can directly drive the first drive shaft 101 to rotate through the first gear set 51, and then drive the left wheel to rotate through the first drive shaft 101. At the same time, the power output by the engine 1 can also be transmitted to the first drive shaft 101 and / or the second drive shaft 102 sequentially through the first coupling device 6, the planetary assembly 4, the transmission assembly 7, and the second coupling device 9, and then drive the wheel 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102. At this time, the power drive system can achieve a hybrid mode of hybrid drive of the second motor 31 and the engine 1. And in this state, the engine 1 can also generate electricity for the first motor 2, that is, the power output by the engine 1 is transmitted to the first motor 2 through the first coupling device 6 and the planetary assembly 4, and then generate electricity for the first motor 2. At this time, the power drive system can achieve an extended-range mode.

[0042] When the first coupling device 6 is disconnected and the second coupling device 9 is coupled, the first motor 2 can drive the wheel 8 to rotate together with the second motor 31. At this time, the second motor 31 can directly drive the first drive shaft 101 to rotate through the first gear set 51, and then drive the left wheel to rotate through the first drive shaft 101. At the same time, since the power of the first motor 2 can be transmitted to the transmission assembly 7 through the planetary assembly 4, the power output by the first motor 2 is transmitted to the first drive shaft 101 and / or the second drive shaft 102 sequentially through the planetary assembly 4, the transmission assembly 7, and the second coupling device 9, and then drive the wheel 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102. At this time, the power drive system can achieve a dual-motor drive mode of the first motor 2 and the second motor 31. And in this state, the first motor 2 can also generate electricity to achieve braking energy recovery. At this time, the braking force of the wheel 8 (left wheel or / and right wheel) is transmitted to the first motor 2 through the second coupling device 9, the transmission assembly 7, and the planetary assembly 4, and then generate electricity for the first motor 2 to achieve the braking energy recovery mode.

[0043] When the first coupling device 6 is coupled and the second coupling device 9 is disconnected, the engine 1 can generate electricity for the first motor 2, that is, the power output by the engine 1 is transmitted to the first motor 2 through the first coupling device 6 and the planetary assembly 4, and then generate electricity for the first motor 2. At this time, the power drive system can achieve an extended-range mode.

[0044] The vehicle in this embodiment only includes a set of power drive systems, and the power drive system only includes two motors, namely the first motor 2 and the second motor 31. In this way, while ensuring the vehicle's endurance and power performance, the number of power drive systems and motors is reduced, thereby reducing the vehicle cost and improving the economic performance of the vehicle.

[0045] In one embodiment, as Figure 2 and Figure 4 shown, the power drive system further includes a third motor 32 and a second gear set 52; the third motor 32 is connected to the target drive shaft through the second gear set 52; the target drive shaft refers to the other drive shaft among the first drive shaft 101 and the second drive shaft 102 except the drive shaft connected to the first gear set 51.

[0046] In this embodiment, as Figure 2 and Figure 4 shown, since the second motor 31 is connected to the first drive shaft 101 or the second drive shaft 102 through the first gear set 51; the third motor 32 is connected to the target drive shaft through the second gear set 52; therefore, taking the first gear set 51 being connected to the first drive shaft 101 and the target drive shaft being the second drive shaft 102 as an example (the case where the first gear set 51 is connected to the second drive shaft 102 and the target drive shaft is the first drive shaft 101 is the same and will not be elaborated here), this embodiment will be specifically described as follows:

[0047] When the first coupling device 6 is disconnected and the second coupling device 9 is disconnected, the second motor 31 can directly drive the first drive shaft 101 to rotate through the first gear set 51, and then drive the left wheel to rotate through the first drive shaft 101; at the same time, the third motor 32 can also directly drive the second drive shaft 102 to rotate through the second gear set 52, and then drive the right wheel to rotate through the second drive shaft 102; at this time, the power drive system is in a dual-motor drive mode jointly driven by the second motor 31 and the third motor 32. Specifically, the dual-motor drive mode of the power drive system in this state is a distributed drive mode, that is, the second motor 31 and the third motor 32 can respectively control the rotation of the left and right wheels, and thus the rotation control of the left and right wheels has higher degrees of freedom and flexibility, and a smaller turning radius can be achieved.

[0048] When the first coupling device 6 is coupled and the second coupling device 9 is coupled, the engine 1 can drive the wheels 8 to rotate together with the second motor 31 and the third motor 32. At this time, the second motor 31 can directly drive the first drive shaft 101 to rotate through the first gear set 51, and then drive the left wheel to rotate through the first drive shaft 101. At the same time, the third motor 32 can also directly drive the second drive shaft 102 to rotate through the second gear set 52, and then drive the right wheel to rotate through the second drive shaft 102. At the same time, the power output by the engine 1 can also be transmitted to the first drive shaft 101 and / or the second drive shaft 102 sequentially through the first coupling device 6, the planetary assembly 4, the transmission assembly 7 and the second coupling device 9, and then drive the wheels 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102. At this time, the power drive system can achieve a hybrid mode of hybrid drive of the second motor 31, the third motor 32 and the engine 1. And in this state, the engine 1 can also generate electricity for the first motor 2, that is, the power output by the engine 1 is transmitted to the first motor 2 through the first coupling device 6 and the planetary assembly 4, and then generate electricity for the first motor 2. At this time, the power drive system can achieve an extended-range mode.

[0049] When the first coupling device 6 is disconnected and the second coupling device 9 is coupled, the first motor 2 can drive the wheels 8 to rotate together with the second motor 31 and the third motor 32. At this time, the second motor 31 can directly drive the first drive shaft 101 to rotate through the first gear set 51, and then drive the left wheel to rotate through the first drive shaft 101. At the same time, the third motor 32 can also directly drive the second drive shaft 102 to rotate through the second gear set 52, and then drive the right wheel to rotate through the second drive shaft 102. At the same time, since the power of the first motor 2 can be transmitted to the transmission assembly 7 through the planetary assembly 4, the power output by the first motor 2 is transmitted to the first drive shaft 101 and / or the second drive shaft 102 sequentially through the planetary assembly 4, the transmission assembly 7 and the second coupling device 9, and then drive the wheels 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102. At this time, the power drive system can achieve a three-motor drive mode of the first motor 2, the second motor 31 and the third motor 32. And in this state, the first motor 2 can also generate electricity to achieve braking energy recovery. At this time, the braking force of the wheels 8 (left wheel or / and right wheel) is transmitted to the first motor 2 through the second coupling device 9, the transmission assembly 7 and the planetary assembly 4, and then generate electricity for the first motor 2 to achieve the braking energy recovery mode.

[0050] When the first coupling device 6 is coupled and the second coupling device 9 is disconnected, the engine 1 can generate electricity for the first motor 2, that is, the power output by the engine 1 is transferred to the first motor 2 through the first coupling device 6 and the planetary assembly 4, and then the first motor 2 generates electricity, and the power drive system can achieve the extended range mode. In this state, the second motor 31 can directly drive the first drive shaft 101 to rotate through the first gear set 51, and then drive the left wheel to rotate through the first drive shaft 101; at the same time, the third motor 32 can also directly drive the second drive shaft 102 to rotate through the second gear set 52, and then drive the right wheel to rotate through the second drive shaft 102; at this time, the power drive system is in a dual-motor drive mode driven by the second motor 31 and the third motor 32.

[0051] In this embodiment, regardless of whether the second coupling device 9 is coupled or not, the second motor 31 can directly drive the first drive shaft 101 to rotate through the first gear set 51, and then drive the left wheel to rotate through the first drive shaft 101; at the same time, the third motor 32 can also directly drive the second drive shaft 102 to rotate through the second gear set 52, and then drive the right wheel to rotate through the second drive shaft 102. The vehicle in this embodiment includes only one power drive system, and the power drive system includes only three motors, namely the first motor 2, the second motor 31 and the third motor 32. In this way, while ensuring the vehicle's endurance and power performance, the number of power drive systems and motors can be reduced, thereby reducing vehicle costs and improving the vehicle's economic performance.

[0052] Furthermore, the second coupling device 9 includes a first clutch 91 and a second clutch 92. At this time, when the first clutch 91 and the second clutch 92 are coupled at the same time, the first drive shaft 101 and the second drive shaft 102 are connected, thereby realizing synchronous rotation of the first drive shaft 101 and the second drive shaft 102. At this time, if the first drive shaft 101 is connected to the left wheel and the second drive shaft 102 is connected to the right wheel, then when one of the left wheel or the right wheel slips or encounters a pothole, the power of one or more motors among the second motor 31, the first motor 2 or the third motor 32 can be concentrated on the first drive shaft 101 and the second drive shaft 102 after being transmitted to at least one drive shaft (the first drive shaft 101 or the second drive shaft 102), thereby improving the vehicle's ability to escape from trouble. At this time, the power drive system can realize an escape mode.

[0053] In one embodiment, if Figure 2 and Figure 4As shown, the transmission assembly 7 includes an output gear 71 and a first transmission gear 72; the second coupling device 9 includes a first clutch 91 and a second clutch 92; the output gear 71 is mounted on the planetary assembly 4, and the first transmission gear 72 meshes with the output gear 71; the first transmission gear 72 is connected to the first drive shaft 101 through the first clutch 91, and the first clutch 91 is used to control the connection and disconnection between the first transmission gear 72 and the first drive shaft 101; the first transmission gear 72 is connected to the second drive shaft 102 through the second clutch 92, and the second clutch 92 is used to control the connection and disconnection between the first transmission gear 72 and the second drive shaft 102. Further, as Figure 2 and Figure 4 shown, the first transmission gear 72 may include a first master-slave gear 721 meshing with the output gear 71 and a second master-slave gear 722 meshing with the first master-slave gear 721, and the second master-slave gear 722 is connected to the first drive shaft 101 through the first clutch 91 and connected to the second drive shaft 92 through the second clutch 92. Understandably, the shape of the first master-slave gear 721 can be set according to requirements. For example, in Figure 2 the shown embodiment, the first master-slave gear 721 may include a first transmission shaft and a first driving gear and a first driven gear coaxially mounted at both ends of the first transmission shaft, and the first driving gear meshes with the output gear 71, and the first driven gear meshes with the second master-slave gear 722. And in Figure 3 the shown embodiment, the opposite sides of the first master-slave gear 721 respectively mesh with the output gear 71 and the second master-slave gear 722.

[0054] In this embodiment, as Figure 2 and Figure 4 shown, the first clutch 91 is used to control the connection and disconnection between the first transmission gear 72 (such as the second master-slave gear 722) and the first drive shaft 101, and the second clutch 91 is used to control the connection and disconnection between the first transmission gear 72 and the second drive shaft 102. Therefore, in this embodiment, when both the first clutch 91 and the second clutch 92 are engaged, the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 will also be transmitted to the first drive shaft 101 and / or the second drive shaft 102 through the first transmission gear 72, and then drive the wheels 8 to rotate through the first drive shaft 101 and / or the second drive shaft 102.

[0055] When the first clutch 91 is engaged and the second clutch 92 is disengaged, the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 will be transmitted to the first drive shaft 101 through the first transmission gear 72, and then drive the left wheel to rotate through the first drive shaft 101.

[0056] When the first clutch 91 is disengaged and the second clutch 92 is engaged, the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 will be transmitted to the second drive shaft 102 through the first transmission gear 72, and then drive the right wheel to rotate through the second drive shaft 102.

[0057] When both the first clutch 91 and the second clutch 92 are disengaged, the power transmitted from the engine 1 or the first motor 2 to the output gear 71 through the planetary assembly 4 cannot be transmitted to the first drive shaft 101 and the second drive shaft 102.

[0058] In this embodiment, the content such as the power is reversely transmitted to the planetary assembly 4 through the second coupling device 9 and the transmission assembly 7 to achieve energy recovery can refer to the above content and will not be elaborated here. In this embodiment, the structure of the transmission assembly 7 is simple and the manufacturing cost is low.

[0059] In one embodiment, as Figure 2 and Figure 4 shown, the first gear set 51 includes a first sun gear 511, a first planet gear 512 and a first planet carrier 513. The second motor 31 is connected to the first sun gear 511. The first planet gear 512 is rotatably mounted on the first planet carrier 513 and meshes with the first sun gear 511. The first planet carrier 513 is connected to the first drive shaft 101 or the second drive shaft 102. Specifically, in this embodiment, the second motor 31 drives the first sun gear 511 to rotate, the first sun gear 511 drives the first planet gear 512 to rotate, and the first planet gear 512 drives the first drive shaft 101 or the second drive shaft 102 to rotate through the first planet carrier 513, and then drives the wheel 8 to rotate. In this embodiment, the structure of the first gear set 51 is simple and the occupied space is small.

[0060] In another embodiment, the first gear set 51 includes a first sun gear 511, a third transmission gear (not shown in the figure) and a second rotating connector (not shown in the figure). The second motor 31 is connected to the first sun gear 511, and the second rotating connector is connected to the first drive shaft 101 or the second drive shaft 102; a second external gear surface is provided on the second rotating connector; the third transmission gear includes a third gear meshing with the first sun gear 511 and a fourth gear meshing with the second external gear surface, and the third gear and the fourth gear are coaxially connected through a third transmission shaft. Specifically, in this embodiment, the second motor 31 drives the first sun gear 511 to rotate, the first sun gear 511 drives the third transmission gear to rotate, and the third transmission gear drives the first drive shaft 101 or the second drive shaft 102 to rotate through the second rotating connector, and then drives the wheel 8 to rotate. In this embodiment, the structure of the first gear set 51 is simple and the occupied space is small.

[0061] In one embodiment, as Figure 2 and Figure 4As shown, the second gear set 52 includes a second sun gear 521, second planet gears 522, and a second planet carrier 523. The third motor 32 is connected to the second sun gear 521. The second planet gears 522 are mounted on the second planet carrier 523 and mesh with the second sun gear 521. The second planet carrier 523 is connected to the target drive shaft. Specifically, the third motor 32 drives the second sun gear 521 to rotate, the second sun gear 521 drives the second planet gears 522 to rotate, and the second planet gears 522 drive the target drive shaft to rotate through the second planet carrier 523, thereby driving the wheel 8 to rotate. In this embodiment, the structure of the second gear set 52 is simple and occupies little space.

[0062] In another embodiment, the second gear set 52 includes a second sun gear 521, a fourth transmission gear (not shown in the figure), and a third rotating connector (not shown in the figure). The third motor 32 is connected to the second sun gear 521, and the third rotating connector is connected to the target drive shaft. The third rotating connector is provided with a third external gear surface. The fourth transmission gear includes a fifth gear meshing with the second sun gear 521 and a sixth gear meshing with the third external gear surface, and the fifth gear and the sixth gear are coaxially connected by a fourth transmission shaft. Specifically, in this embodiment, the third motor 32 drives the second sun gear 211 to rotate, the second sun gear 211 drives the fourth transmission gear to rotate, and the fourth transmission gear drives the target drive shaft to rotate through the third rotating connector, thereby driving the wheel 8 to rotate. In this embodiment, the structure of the second gear set 52 is simple and occupies little space.

[0063] In one embodiment, as Figure 1 and Figure 2 shown, the planetary assembly 4 includes a third sun gear 41, third planet gears 42, an internal gear ring 43, and a third planet carrier 44. The first motor 2 is connected to the third sun gear 41. The third planet gears 42 are mounted on the third planet carrier 44 and mesh with the third sun gear 41. The internal gear ring 43 meshes with the third planet gears 42. The engine 1 is connected to the third planet carrier 44 through a first coupling device 6, and the internal gear ring 43 is connected to the first drive shaft 101 and / or the second drive shaft 102 through a transmission assembly 7. It can be understood that, as Figure 1 shown, the internal gear ring 43 is directly connected to the second drive shaft 102 through the transmission assembly 7. As Figure 2 shown, the internal gear ring 43 is connected to the first drive shaft 101 and / or the second drive shaft 102 through the transmission assembly 7 and a second coupling device 9.

[0064] Specifically, as Figure 1 and Figure 2As shown, when the first coupling device 6 is engaged, the engine 1 can drive the third planet carrier 44 to rotate through the first coupling device 6. The third planet carrier 44 drives the third planet gear 42 to rotate, and the third planet gear 42 drives the internal gear ring 43 to rotate. The internal gear ring 43 can drive the first drive shaft 101 and / or the second drive shaft 102 to rotate through the transmission assembly 7. The engine 1 can also drive the third planet carrier 44 to rotate through the first coupling device 6. The third planet carrier 44 drives the third planet gear 42 to rotate, and then drives the third sun gear 41 to rotate through the third planet gear 42 to generate electricity for the first motor 2. When the first coupling device 6 is disengaged, the first motor 2 can drive the third sun gear 41 to rotate. The third sun gear 41 drives the third planet gear 42 to rotate, and the third planet gear 42 drives the internal gear ring 43 to rotate. The internal gear ring 43 can drive the first drive shaft 101 and / or the second drive shaft 102 to rotate through the transmission assembly 7 (or the transmission assembly 7 and the second coupling device 9). In this embodiment, the content of the power being reversely transmitted through the transmission assembly 7 (or the second coupling device 9 and the transmission assembly 7) to the planetary assembly 4 to achieve energy recovery and the like can refer to the above content and will not be elaborated here. In this embodiment, the structure of the planetary assembly 4 is simple and occupies little space.

[0065] In one embodiment, as Figure 1 and Figure 2 shown, the first coupling device 6 includes a first brake 61, a second brake 62, and a third clutch 63. The engine 1 is connected to the third planet carrier 44 through the third clutch 63. The first brake 61 is connected to the third planet carrier 44 and the housing. The first brake 61 is used to control the connection and disconnection between the third planet carrier 44 and the housing. The second brake 62 is connected to the internal gear ring 43 and the housing. The second brake 62 is used to control the connection and disconnection between the internal gear ring 43 and the housing. It can be understood that the housing refers to the housing for accommodating each component of the power drive system. For example, when the power drive system is the drive system of a vehicle, the housing includes but is not limited to the vehicle body, or a part of the vehicle body, etc. It can be understood that when the first brake 61 is in the engaged state, the third planet carrier 44 cannot rotate. When the first brake 61 is in the disengaged state, the third planet carrier 44 can rotate freely. When the second brake 62 is in the engaged state, the internal gear ring 43 cannot rotate. When the second brake 62 is in the disengaged state, the internal gear ring 43 can rotate freely. When the third clutch 63 is engaged, the engine 1 is connected to the third planet carrier 44 through the third clutch 63, and the power of the engine 1 can be transmitted to the planetary assembly 4. When the third clutch 63 is disengaged, the connection between the engine 1 and the third planet carrier 44 is disconnected, and the power of the engine 1 cannot be transmitted to the planetary assembly 4. In this embodiment, by controlling the engagement or disengagement of the first brake 61, the second brake 62, and the third clutch 63, different modes of the power drive system can be achieved. In this embodiment, the structure of the first coupling device 6 is simple and the manufacturing cost is low.

[0066] In one embodiment, as Figure 3 and Figure 4 shown, the planetary assembly 4 includes a third sun gear 41, third planet gears 42, an internal gear ring 43, and a fourth planet carrier 45; the first motor 2 is connected to the third sun gear 41, the third planet gears 42 are mounted on the fourth planet carrier 45 and mesh with the third sun gear 41, and the internal gear ring 43 meshes with the third planet gears 42; the engine 1 is connected to the internal gear ring 43 through a first engaging device 6, and the fourth planet carrier 45 is connected to the first drive shaft 101 and / or the second drive shaft 102 through a transmission assembly 7. Understandably, as Figure 3 shown, the fourth planet carrier 45 is directly connected to the second drive shaft 102 through the transmission assembly 7. As Figure 4 shown, the fourth planet carrier 45 is connected to the first drive shaft 101 and / or the second drive shaft 102 through the transmission assembly 7 and a second engaging device 9.

[0067] Specifically, as Figure 3 and Figure 4 shown, when the first engaging device 6 is engaged, the engine 1 can drive the internal gear ring 43 to rotate through the first engaging device 6, the internal gear ring 43 drives the third planet gears 42 to rotate, the third planet gears 42 drive the fourth planet carrier 45 to rotate, and the fourth planet carrier 45 can drive the first drive shaft 101 and / or the second drive shaft 102 to rotate through the transmission assembly 7 (or the transmission assembly 7 and the second engaging assembly 9). The engine 1 can also drive the internal gear ring 43 to rotate through the first engaging device 6, the internal gear ring 43 drives the third planet gears 42 to rotate, and then drives the third sun gear 41 to rotate through the third planet gears 42 to generate electricity for the first motor 2. At the same time, the first motor 2 drives the third sun gear 41 to rotate, the third sun gear 41 drives the third planet gears 42 to rotate, the third planet gears 42 drive the fourth planet carrier 45 to rotate, and the fourth planet carrier 45 can drive the first drive shaft 101 and / or the second drive shaft 102 to rotate through the first engaging device 6. In this embodiment, the content such as the power is reversely transmitted to the planetary assembly 4 through the transmission assembly 7 (or the second engaging assembly 9 and the transmission assembly 7) to achieve energy recovery and the like can refer to the above content and will not be elaborated here. In this embodiment, the structure of the planetary assembly 4 is compact and occupies a small space.

[0068] In one embodiment, as Figure 3 and Figure 4As shown, the first coupling device 6 includes a third clutch 63, a first brake 61, and a fourth clutch 64; the engine 1 is connected to the internal gear ring 43 through the third clutch 63, and the first brake 61 is connected to the internal gear ring 43 and the housing. The first brake 61 is used to control the connection and disconnection between the internal gear ring 43 and the housing; the fourth clutch 64 is connected to the internal gear ring 43 and the third sun gear 41, and the fourth clutch 64 is used to control the connection and disconnection between the internal gear ring 43 and the third sun gear 41. It can be understood that the housing refers to the housing for accommodating each component of the power drive system. For example, when the power drive system is the drive system of a vehicle, the housing includes but is not limited to the vehicle body, or a part of the vehicle body, etc. It can be understood that when the first brake 61 is engaged, the internal gear ring 43 cannot rotate, and when the first brake 61 is disengaged, the internal gear ring 43 can rotate freely; when the fourth clutch 64 is engaged, it can control the synchronous rotation of the internal gear ring 43 and the third sun gear 41; when the fourth clutch 64 is disengaged, the internal gear ring 43 and the third sun gear 41 will not rotate synchronously; when the third clutch 63 is engaged, the engine 1 is connected to the internal gear ring 43 through the third clutch 63, and the power of the engine 1 can be transmitted to the planetary assembly 4; when the third clutch 63 is disengaged, the connection between the engine 1 and the internal gear ring 43 is disconnected, and the power of the engine 1 cannot be transmitted to the planetary assembly 4. In this embodiment, by controlling the engagement or disengagement of the first brake 61, the third clutch 63, and the fourth clutch 64, different modes of the power drive system can be realized. In this embodiment, the structure of the first coupling device 6 is simple and the manufacturing cost is low.

[0069] To further illustrate the power drive system in the present invention, taking the Figure 1 power drive system as an example for further illustration, in the embodiment shown in Figure 1 , as shown in Table 1 below, the operating modes of the power drive system include:

[0070] (1) When the first brake 61 and the first clutch 91 are engaged, the third clutch 63 and the second brake 62 are both disengaged, and when the second clutch 92 is disengaged or engaged, the second motor 31 drives the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91, and the first motor 2 can drive the second drive shaft 102 to rotate through the planetary assembly 4, the output gear 71, and the output gear 71. At this time, if the second clutch 92 is disengaged, the second drive shaft 102 only drives the right wheel to rotate; if the second clutch 92 is engaged, the second drive shaft 102 will also drive the left wheel to rotate through the first gear set 51, the first clutch 91, and the first drive shaft 101. At this time, the power drive system is in the dual-motor drive mode 1 in Table 1.

[0071] (2) When the first clutch 91 and the second clutch 92 are engaged and the third clutch 63, the first brake 61, and the second brake 62 are all disengaged, the second motor 31 can drive the first drive shaft 101 and the second drive shaft 102 to rotate through the first gear set 51. At this time, the power drive system is in the single-motor drive mode in Table 1.

[0072] (3) When the third clutch 63 and the first clutch 91 are both engaged and the second clutch 92, the first brake 61, and the second brake 62 are all disengaged, the engine 1 drives the first motor 2 to rotate through the planetary assembly 4 so that the first motor 2 generates electricity to achieve the range-extending mode; the engine 1 can also drive the second drive shaft 102 to rotate through the planetary assembly 4, the output gear 71, the first transmission gear 72, and the first clutch 91; the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91. At this time, the power drive system can achieve the hybrid drive mode of the engine 1 and the second motor 31, and can also achieve the range-extending mode of the engine 1 generating electricity for the first motor 2; that is, the power drive system is in the ICE (internal combustion engine, that is, the engine 1) + range-extending + single-motor drive mode 1 in Table 1.

[0073] (4) When the third clutch 63, the first clutch 91, and the second clutch 92 are all engaged and the first brake 61 and the second brake 62 are all disengaged, the engine 1 drives the first motor 2 to rotate through the planetary assembly 4 so that the first motor 2 generates electricity to achieve the range-extending mode; and the engine 1 can also drive the first drive shaft 101 to rotate through the planetary assembly 4, the output gear 71, the first transmission gear 72, and the first clutch 91, and the engine 1 can also drive the second drive shaft 102 to rotate through the planetary assembly 4, the output gear 71, the first transmission gear 72, and the second clutch 92; at the same time, the second motor 31 can drive the second drive shaft 102 to rotate through the first transmission assembly 51 and the second clutch 92. At this time, the power drive system can achieve the hybrid drive mode of the engine 1 and the second motor 31, and can also achieve the range-extending mode of the engine 1 generating electricity for the first motor 2; the power drive system is in the ICE + range-extending + single-motor drive mode 2 in Table 1.

[0074] (5) When the third clutch 63 and the second brake 62 are both engaged and the first clutch 91, the second clutch 92, and the first brake 61 are all disengaged, at this time, the engine 1 drives the first motor 2 to rotate in sequence through the third clutch 63 and the planetary assembly 4 so that the first motor 2 generates electricity. At this time, the power drive system is in the range-extending mode in Table 1.

[0075] (6) When the first brake 61 is engaged, and the third clutch 63, the first clutch 91, the second clutch 92 and the second brake 62 are all disconnected, if the first motor 2 is not started to drive, at this time, the braking force of the right wheel will be transmitted to the first motor 2 through the second drive shaft 102, the first transmission gear 72, the output gear 71 and the planetary assembly 4, thereby driving the first motor 2 to rotate to generate electricity. At this time, the power drive system is in the braking energy recovery mode 1 in Table 1.

[0076] (7) When the first clutch 91 and the second clutch 92 are both engaged, and the third clutch 63, the first brake 61 and the second brake 62 are all disconnected, the braking force of the first drive shaft 101 or the second drive shaft 102 will drive the second motor 31 to rotate through the first gear set 51, the first clutch 91 and the second clutch 92 to generate electricity. At this time, the power drive system is in the braking energy recovery mode 2 in Table 1.

[0077] (8) When the first clutch 91 and the second clutch 92 are both engaged, the first brake 61 is engaged, and the third clutch 63 and the second brake 62 are both disconnected, if the first motor 2 is not started, the braking force of the right wheel will drive the first motor 2 to rotate through the second drive shaft 102, the first transmission gear 72, the output gear 71 and the planetary assembly 4 in sequence to generate electricity; and the braking force of the first drive shaft 101 or the second drive shaft 102 can also drive the second motor 31 to rotate to generate electricity through the first gear set 51, the first clutch 91 and the second clutch 92. At this time, the power drive system is in the braking energy recovery mode 3 in Table 1.

[0078] (9) When the first clutch 91, the second clutch 92 and the first brake 61 are all engaged, and the third clutch 63 and the second brake 62 are both disconnected, the second motor 31 and the first motor 2 can both drive the first drive shaft 101 and the second drive shaft 102 to rotate. At this time, if the left wheel connected to the first drive shaft 101 or the right wheel connected to the second drive shaft 102 slips or encounters a pothole, the power of the second motor 31 and the first motor 2 can be concentrated on the first drive shaft 101 and the second drive shaft 102, thereby improving the vehicle's ability to escape from trouble. At this time, the power drive system is in differential lock mode 1 in Table 1.

[0079] (10) When the third clutch 63, the first clutch 91, and the second clutch 92 are all engaged, and the first brake 61 and the second brake 62 are both disengaged, both the second motor 31 and the engine 1 can drive the first drive shaft 101 and the second drive shaft 102 to rotate. At this time, when the left wheel connected to the first drive shaft 101 or the right wheel connected to the second drive shaft 102 slips or encounters a pothole, the power of the second motor 31 and the engine 1 can be concentrated on the first drive shaft 101 or the second drive shaft 102, improving the vehicle's ability to escape from trouble. At this time, the power drive system is in differential lock mode two in Table 1.

[0080] Table 1 Figure 1 Power drive system working state mode table

[0081]

[0082]

[0083] To further illustrate the power drive system in the present invention, taking the Figure 2 power drive system as an example for further illustration. In the embodiment shown in Figure 2 , as shown in Table 2, the operating modes of the power drive system include:

[0084] (1) When the third clutch 63, the first clutch 91, and the second clutch 92 are all disengaged, and the first brake 61 and the second brake 62 are both disengaged, the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51, and the third motor 32 can drive the second drive shaft 102 to rotate through the transmission component 52. At this time, the power drive system is in the dual-motor drive mode in Table 2.

[0085] (2) When the first clutch 91 is engaged, the first brake 61 is engaged, and the third clutch 63, the second clutch 92, and the second brake 62 are all disengaged, the second motor 31 drives the first drive shaft 101 to rotate, the third motor 32 drives the second drive shaft 102 to rotate, and the first motor 2 drives the first drive shaft 101 to rotate through the planetary component 4, the output gear 71, the first transmission gear 72, and the third clutch 63. At this time, the power drive system is in the first three-motor drive mode in which the first motor 2, the second motor 31, and the third motor 32 drive together. That is, the power drive system is in three-motor drive mode one in Table 2.

[0086] (3) When the second clutch 92 is engaged, the first brake 61 is engaged, and the third clutch 63, the first clutch 91, and the second brake 62 are all disengaged, the second motor 31 drives the first drive shaft 101 to rotate, and the third motor 32 drives the second drive shaft 102 to rotate. The first motor 2 drives the second drive shaft 102 to rotate through the planetary assembly 4, the output gear 71, the first transmission gear 72, and the first clutch 91. At this time, the power drive system is in the second three-motor drive mode jointly driven by the first motor 2, the second motor 31, and the third motor 32. That is, the power drive system is in the three-motor drive mode two in Table 2.

[0087] (4) When the third clutch 63 and the first clutch 91 are engaged, and the second clutch 92, the first brake 61, and the second brake 62 are all disengaged, the second motor 31 can drive the first drive shaft 101 to rotate, and the third motor 32 can drive the second drive shaft 102 to rotate; the engine 1 drives the first motor 2 to rotate through the planetary assembly 4 to generate electricity for the first motor 2, realizing the range-extending mode. The engine 1 can also drive the first drive shaft 101 to rotate through the planetary assembly 4, the output gear 71, the first transmission gear 72, and the first clutch 91. At this time, the power drive system can realize the first hybrid drive mode of the engine 1, the second motor 31, and the third motor 32, and at the same time, it can also realize the range-extending mode of using the engine 1 to generate electricity for the first motor 2. That is, the power drive system is in the ICE + range-extending + dual-motor drive mode one in Table 2.

[0088] (5) When the third clutch 63 and the second clutch 92 are engaged, and the first clutch 91, the first brake 61, and the second brake 62 are all disengaged, the second motor 31 can drive the first drive shaft 101 to rotate, and the third motor 32 can drive the second drive shaft 102 to rotate; the engine 1 drives the first motor 2 to rotate through the planetary assembly 4 to generate electricity for the first motor 2, realizing the range-extending mode. The engine 1 can also drive the second drive shaft 102 to rotate through the planetary assembly 4, the output gear 71, the first transmission gear 72, and the second clutch 92. At this time, the power drive system can realize the second hybrid drive mode of the engine 1, the second motor 31, and the third motor 32, and at the same time, it can also realize the range-extending mode of using the engine 1 to generate electricity for the first motor 2; that is, the power drive system is in the ICE + range-extending + dual-motor drive mode two in Table 2.

[0089] (6) When the third clutch 63 and the second brake 62 are engaged, and the first clutch 91, the second clutch 92, and the first brake 61 are all disengaged, the second motor 31, the third motor 32, and the engine 1 are all started for driving. At this time, the second motor 31 can drive the first drive shaft 101 to rotate, the third motor 32 can drive the second drive shaft 102 to rotate, and the engine 1 drives the first motor 2 to rotate through the planetary assembly 4 for power generation. At this time, the power drive system can achieve the dual-motor drive mode of the second motor 31 and the third motor 32, and at the same time, it can also achieve the range-extending mode of using the engine 1 to generate power for the first motor 2; that is, the power drive system is in the range-extending + dual-motor drive mode in Table 2.

[0090] (7) When the third clutch 63 and the second brake 62 are engaged, and the first clutch 91, the second clutch 92, and the first brake 61 are all disengaged, only the engine 1 is started for driving. At this time, the engine 1 drives the first motor 2 to rotate through the planetary assembly 4 for power generation. At this time, the power drive system is in the range-extending mode in Table 2.

[0091] (8) When the first brake 61, the first clutch 91, and the second clutch 92 are all engaged or in slip, and the third clutch 63 and the second brake 62 are all disengaged, if only the first motor 2 is driving, at this time, the first motor 2 can drive the first drive shaft 101 and the second drive shaft 102 to rotate through the planetary assembly 4, the output gear 71, the first transmission gear 72, and the first clutch 91 and the second clutch 92. At this time, the power drive system is in the single-motor drive mode one in Table 2 driven by the first motor 2.

[0092] (9) When the third clutch 63, the first clutch 91, the second clutch 92, the first brake 61, and the second brake 62 are all disengaged, the braking force of the left wheel can be transmitted to the second motor 31 through the first drive shaft 101 and the first gear set 51, thereby driving the second motor 31 to rotate so that the second motor 31 generates power to achieve braking energy recovery; the braking force of the right wheel can be transmitted to the third motor 32 through the second drive shaft 102 and the second transmission assembly 52, thereby driving the third motor 32 to rotate so that the third motor 32 generates power to achieve braking energy recovery; at this time, the power drive system is in the braking energy recovery mode one in Table 2.

[0093] (10) When the first brake 61 is engaged, at least one of the first clutch 91 and the second clutch 92 is in the engaged state, and both the third clutch 63 and the second brake 62 are disengaged, the second motor 31 and / or the third motor 32 (corresponding to the engaged first clutch 91 or / and second clutch 92) can drive the first motor 2 to rotate through the first transmission gear 72, the output gear 71, and the planetary assembly 4, so that the first motor 2 generates electricity to achieve braking energy recovery; at the same time, the first drive shaft 101 can also drive the second motor 31 to rotate through the first gear set 51 to generate electricity, and the second drive shaft 102 can also drive the second and third motors 32 to rotate through the transmission assembly 52 to generate electricity; at this time, the power drive system is in braking energy recovery mode two in Table 2.

[0094] (11) When both the first clutch 91 and the second clutch 92 are engaged and both the third clutch 63, the first brake 61, and the second brake 62 are disengaged, the second motor 31 drives the first drive shaft 101 to rotate, and the third motor 32 drives the second drive shaft 102 to rotate. When the wheels on the first drive shaft 101 or the second drive shaft 102 slip or encounter potholes, the power of the second motor 31 and the third motor 32 can be concentrated on the first drive shaft 101 or the second drive shaft 102, improving the vehicle's ability to get out of trouble. At this time, the power drive system is in differential lock mode one in Table 2.

[0095] (12) When the first clutch 91, the second clutch 92, and the first brake 61 are all engaged and both the third clutch 63 and the second brake 62 are disengaged, the first motor 2, the second motor 31, and the third motor 32 all drive. When the wheels on the first drive shaft 101 or the second drive shaft 102 slip or encounter potholes, the power of the second motor 31 and the third motor 32 can be concentrated on the first drive shaft 101 or the second drive shaft 102, improving the vehicle's ability to get out of trouble. At this time, the power drive system is in differential lock mode two in Table 2.

[0096] (13) When the third clutch 63, the first clutch 91, and the second clutch 92 are all engaged and both the first brake 61 and the second brake 62 are disengaged, the engine 1, the second motor 31, and the third motor 32 all drive, and the first motor 2 is in the power generation state. When the wheels on the first drive shaft 101 or the second drive shaft 102 slip or encounter potholes, the power of the second motor 31 and the third motor 32 can be concentrated on the first drive shaft 101 or the second drive shaft 102, improving the vehicle's ability to get out of trouble. At this time, the power drive system is in differential lock mode three in Table 2.

[0097] Table 2 Figure 2 Power drive system working state mode table in

[0098]

[0099]

[0100] To further illustrate the power drive system in the present utility model, taking the power drive system in Figure 3 as an example for further illustration. In the embodiment shown in Figure 3 as shown in Table 3 below, the operating modes of the power drive system include:

[0101] (1) When the first clutch 91 and the first brake 61 are both engaged, and the third clutch 63, the second clutch 92, and the fourth clutch 64 are all disengaged, the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91; and the first motor 2 can drive the second drive shaft 102 to rotate through the third sun gear 41, the third planet gear 42, the fourth planet carrier 45, the output gear 71, and the first transmission gear 72. At this time, the power drive system is in the dual-motor drive mode 1 in Table 3.

[0102] (2) When the first clutch 91 and the fourth clutch 64 are engaged, and the third clutch 63, the second clutch 92, and the first brake 61 are disengaged, the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91; and the first motor 2 can drive the second drive shaft 102 to rotate in sequence through the fourth clutch 64, the internal gear ring 43, the third planet gear 42, the fourth planet carrier 45, the output gear 71, and the first transmission gear 72. At this time, the power drive system is in the dual-motor drive mode 2 in Table 3.

[0103] (3) When the third clutch 63, the first clutch 91, and the fourth clutch 64 are all engaged, and the second clutch 92 and the first brake 61 are disengaged, the engine 1 can drive the second drive shaft 102 to rotate in sequence through the planetary assembly 4, the output gear 71, and the first transmission gear 72; and the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91. At this time, the power drive system is in the ICE + single-motor drive mode in Table 3.

[0104] (4) When the third clutch 63 and the fourth clutch 64 are both engaged, and the first clutch 91, the second clutch 92, and the first brake 61 are all disengaged, the engine 1 drives the first motor 2 to rotate for power generation in sequence through the third clutch 63, the internal gear ring 43, and the fourth clutch 64. At this time, the power drive system is in the range-extending mode in Table 3.

[0105] (5) When the first clutch 91 and the second clutch 92 are both engaged or slipping, and the third clutch 63, the fourth clutch 64 and the first brake 61 are all disconnected, if the second motor 31 starts to drive, the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91, and drive the second drive shaft 102 to rotate through the first gear set 51 and the second clutch 92. At this time, the power drive system is in the single motor drive mode in Table 3.

[0106] (6) When the first clutch 91 and the second clutch 92 are both engaged, and the third clutch 63, the first brake 61 and the fourth clutch 64 are all disconnected, if the second motor 31 is not started to drive, the braking force of the left wheel can drive the second motor 31 to rotate to generate electricity through the first drive shaft 101, the first clutch 91 and the first gear set 51, and the braking force of the right wheel can also drive the second motor 31 to rotate to generate electricity through the second drive shaft 102, the second clutch 92 and the first gear set 51. At this time, the power drive system is in the braking energy recovery mode 1 in Table 3.

[0107] (7) When the first clutch 91 and the first brake 61 are both engaged, the second clutch 92 is engaged or disengaged, and the third clutch 63 and the fourth clutch 64 are both disengaged, if the first motor 2 and the second motor 31 are not started and the second clutch 92 is disengaged, the braking force of the right wheel can drive the first motor 2 to rotate to generate electricity through the second drive shaft 102, the first transmission gear 72, the output gear 71, the fourth planetary carrier 45, the third planetary gear 42, and the third sun gear 41; and when the second clutch 92 is engaged, the braking force of the right wheel can also drive the second motor 31 to rotate to generate electricity through the second drive shaft 102, the second clutch 92, and the first gear set 51; at this time, the power drive system is in the braking energy recovery mode 2 in Table 3.

[0108] (8) When the first clutch 91 and the second clutch 92 are both engaged, and the third clutch 63, the fourth clutch 64 and the first brake 61 are all disconnected, the second motor 31 can drive the first drive shaft 101 to rotate through the second clutch 92, the first gear set 51 and the first clutch 91; the second motor 31 can also drive the second drive shaft 102 to rotate through the first gear set 51 and the second clutch 92; at this time, if the wheels on the first drive shaft 101 or the second drive shaft 102 slip or encounter potholes, the power of the second motor 31 can be concentrated on the first drive shaft 101 or the second drive shaft 102, thereby improving the vehicle's ability to escape from difficulties. At this time, the power drive system is in differential lock mode 1 in Table 3.

[0109] When the first clutch 91, the second clutch 92 and the first brake 61 are all engaged and the third clutch 63 and the fourth clutch 64 are both disengaged, the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91; the second motor 31 can also drive the second drive shaft 102 to rotate through the first gear set 51 and the second clutch 92. The first motor 2 can drive the first drive shaft 101 to rotate through the third sun gear 41, the third planet gear 42, the fourth planet carrier 45, the output gear 71, the first transmission gear 72 and the first clutch 91. The first motor 2 drives the second drive shaft 102 to rotate through the third sun gear 41, the third planet gear 42, the fourth planet carrier 45, the output gear 71 and the first transmission gear 72. When the wheels on the first drive shaft 101 or the second drive shaft 102 slip or encounter potholes, the power of the second motor 31 and the first motor 2 can be concentrated on the first drive shaft 101 or the second drive shaft 102, improving the vehicle's ability to get out of trouble. At this time, the power drive system is in differential lock mode two in Table 3.

[0110] When the first clutch 91, the second clutch 92 and the fourth clutch 64 are all engaged and the third clutch 63 and the first brake 61 are both disengaged, the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91. The second motor 31 can also drive the second drive shaft 102 to rotate through the first gear set 51 and the second clutch 92. The first motor 2 can drive the first drive shaft 101 to rotate through the third sun gear 41, the fourth clutch 64, the internal gear ring 43, the first planet gear 512, the fourth planet carrier 45, the output gear 71, the first transmission gear 72 and the first clutch 91. The first motor 2 can also drive the second drive shaft 102 to rotate through the third sun gear 41, the fourth clutch 64, the internal gear ring 43, the first planet gear 512, the fourth planet carrier 45, the output gear 71 and the first transmission gear 72. At this time, when the wheels on the first drive shaft 101 or the second drive shaft 102 slip or encounter potholes, the power of the second motor 31 and the first motor 2 can be concentrated on the first drive shaft 101 or the second drive shaft 102, improving the vehicle's ability to get out of trouble. At this time, the power drive system is in differential lock mode three in Table 3.

[0111] (10) When the first clutch 91, the second clutch 92, the third clutch 63 and the fourth clutch 64 are all engaged and the first brake 61 is disengaged, the second motor 31 can drive the first drive shaft 101 to rotate through the first gear set 51 and the first clutch 91; the second motor 31 can also drive the second drive shaft 102 to rotate through the first gear set 51 and the second clutch 92; the engine 1 can drive the first motor 2 to idle through the third clutch 63, the internal gear ring 43 and the fourth clutch 64; when the wheels on the first drive shaft 101 or the second drive shaft 102 slip or encounter potholes, the power of the second motor 31 and the engine 1 can be concentrated on the first drive shaft 101 or the second drive shaft 102, improving the vehicle's ability to get out of trouble. At this time, the power drive system is in differential lock mode four in Table 3.

[0112] Table 3 Figure 3 Power drive system operating state mode table

[0113]

[0114]

[0115] Table 4 Figure 4 Power drive system operating state mode table

[0116]

[0117]

[0118] Understandably, Figure 4 the power drive system operating state mode table corresponding to the embodiment shown in Figure 4 is as shown, and specifically can be referred to the embodiments corresponding to Table 1 to 3 above, which will not be elaborated here.

[0119] In the present invention, the power drive system realizes multiple drive modes through the engagement and disengagement of different brakes and clutches in the first engagement device 6 and the second engagement device 9. It should be noted that only some drive modes of the power drive system are described above. The drive modes not mentioned in this specification but can be deduced according to the specific structure of the above power drive system are also within the protection scope of the present invention.

[0120] In summary, in the above embodiments of the present invention, referring to Table 1 and Table 3, the power drive system can realize dual-motor drive mode (including dual-motor drive mode 1 and dual-motor drive mode 2), single-motor drive mode, ICE+extended-range+single-motor drive mode (including ICE+extended-range+single-motor drive mode 1 and ICE+extended-range+single-motor drive mode 2), ICE+single-motor drive mode, braking energy recovery mode (including braking energy recovery mode 1, braking energy recovery mode 2 and braking energy recovery mode 3), extended-range mode, differential lock mode (including differential lock mode 1, differential lock mode 2, differential lock mode 3 and differential lock mode 4), etc. through two motors, the first motor 2 and the second motor 31.

[0121] At the same time, referring to Table 2 and Table 4, the power drive system can realize a dual-motor drive mode, a three-motor drive mode (including three-motor drive mode 1, three-motor drive mode 2, three-motor drive mode 3, and three-motor drive mode 4) through the three motors of the first motor 2, the second motor 31, and the third motor 31, ICE+three-motor drive mode (including ICE+three-motor drive mode 1, ICE+three-motor drive mode 2), ICE+extended-range+dual-motor drive mode (including ICE+extended-range+dual-motor drive mode 1, ICE+extended-range+dual-motor drive mode 2), extended-range+dual-motor drive mode, single-motor drive mode (including single-motor drive mode 1, single-motor drive mode 2), extended-range mode, braking energy recovery mode (including braking energy recovery mode 1, braking energy recovery mode 2, braking energy recovery mode 3), differential lock mode (including differential lock mode 1, differential lock mode 2, differential lock mode 3, differential lock mode 4, differential lock mode 5), etc. Among them, the dual-motor drive mode is a common mode for vehicles with this power drive system; the single-motor drive mode can be used for high-speed cruising. At this time, one less motor is working, which can reduce losses and improve endurance. The ICE+extended-range+single-motor drive mode and the ICE+single-motor drive mode are both suitable for open roads, which can improve the vehicle's passability; among them, the open road refers to the different adhesion coefficients on both sides of the wheel, such as one side is ice and the other side is dry road. The extended-range mode can be used for charging to improve the vehicle's cruising ability. The brake energy recovery mode can be used for energy recovery; and the differential lock mode can be operated when one side of the wheel slips to improve the vehicle's ability to get out of trouble.

[0122] In the above modes:

[0123] The dual-motor driving mode is a common mode for vehicles with this power driving system.

[0124] The single-motor drive mode can be used for high-speed cruising. With one less motor working, losses can be reduced and endurance can be improved.

[0125] Both the three-motor driving mode and the ICE+three-motor driving mode are suitable for split roads. The engine 1 or the first motor 2 can be used to increase the power output of one wheel end to improve the vehicle's passability. Split roads refer to roads with different adhesion coefficients on both sides of the wheels, such as ice on one side and dry road on the other.

[0126] ICE+extended-range+single-motor drive mode, ICE+single-motor drive mode, and ICE+extended-range+dual-motor drive mode are all suitable for split-road vehicles and can improve the vehicle's passability; and among them, ICE+extended-range+single-motor drive mode and ICE+extended-range+dual-motor drive mode can also be charged to improve the vehicle's cruising capability.

[0127] The extended-range + dual-motor drive mode can achieve driving charging, thereby improving the vehicle's cruising capability.

[0128] The extended range mode can be used for charging to improve the vehicle's cruising capability.

[0129] The braking energy recovery mode can be used to recover energy.

[0130] The differential lock mode can be operated when one side of the wheel slips to improve the vehicle's ability to escape from trouble.

[0131] Another embodiment of the utility model further provides a vehicle, comprising the above-mentioned power drive system.

[0132] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power drive system, characterized in that: It includes an engine, a first motor, a second motor, a planetary assembly, a first gear set, a first combining device, a second combining device, a transmission assembly, a first drive shaft and a second drive shaft; The first combination device and the planetary assembly are connected between the engine and the first motor; the first combination device is connected to the planetary assembly, and power is transmitted between the engine, the first motor and the transmission assembly through the planetary assembly; the first combination device is used to control the connection and disconnection between the first motor and / or the transmission assembly and the engine; The second motor is connected to the first gear set; The first gear set and / or the transmission assembly transmits driving force to the first drive shaft and / or the second drive shaft through the second coupling device, and the second coupling device is arranged between the first drive shaft and the second drive shaft and is used to control the coupling or disconnection of the first drive shaft and the second drive shaft.

2. The power drive system according to claim 1, characterized in that: The first gear set is selectively connected to the first drive shaft and / or the second drive shaft through the second coupling device; the planetary assembly is connected to the first drive shaft or the second drive shaft through the transmission assembly.

3. The power drive system according to claim 2, characterized in that: The transmission assembly includes an output gear and a first transmission gear; the second coupling device includes a first clutch and a second clutch; the output gear is mounted on the planetary assembly, and the first transmission gear is mounted on the first drive shaft or the second drive shaft and meshes with the output gear; The first gear set is connected to the first drive shaft via the first clutch, and the first clutch is used to control the connection and disconnection between the first gear set and the first drive shaft; The first gear set is connected to the second drive shaft via the second clutch, and the second clutch is used to control the connection and disconnection between the first gear set and the second drive shaft.

4. The power drive system according to claim 3, characterized in that: The first gear set includes a first sun gear, a first planetary gear and a first planetary carrier, the second motor is connected to the first sun gear, the first planetary gear is rotatably mounted on the first planetary carrier and meshes with the first sun gear, and the first planetary carrier is connected to the first clutch and the second clutch; the first clutch is used to control the connection and disconnection between the first planetary carrier and the first drive shaft, and the second clutch is used to control the connection and disconnection between the first planetary carrier and the second drive shaft; or The first gear set includes a first sun gear, a second transmission gear and a first rotating connecting member, the second motor is connected to the first sun gear, and the first rotating connecting member is connected to the first clutch and the second clutch; the first rotating connecting member is provided with a first external gear surface; the second transmission gear includes a first gear meshed with the first sun gear and a second gear meshed with the first external gear surface; the first clutch is used to control the connection and disconnection between the first rotating connecting member and the first drive shaft, and the second clutch is used to control the connection and disconnection between the first rotating connecting member and the second drive shaft.

5. The power drive system according to claim 1, characterized in that: The second motor is connected to the first drive shaft or the second drive shaft through the first gear set; the planetary assembly is selectively connected to the first drive shaft and / or the second drive shaft through the transmission assembly and the second coupling device.

6. The power drive system according to claim 5, characterized in that: The transmission assembly includes an output gear and a first transmission gear; the second coupling device includes a first clutch and a second clutch; the output gear is mounted on the planetary assembly, and the first transmission gear is meshed with the output gear; The first transmission gear is connected to the first drive shaft via the first clutch, and the first clutch is used to control the connection and disconnection between the first transmission gear and the first drive shaft; The first transmission gear is connected to the second drive shaft through the second clutch, and the second clutch is used to control the connection and disconnection between the first transmission gear and the second drive shaft.

7. The power drive system according to claim 5, characterized in that: The first gear set includes a first sun gear, a first planet gear and a first planet carrier, the second motor is connected to the first sun gear, the first planet gear is rotatably mounted on the first planet carrier and meshes with the first sun gear, and the first planet carrier is connected to the first drive shaft or the second drive shaft; or The first gear set includes a first sun gear, a third transmission gear and a second rotating connecting member, the second motor is connected to the first sun gear, and the second rotating connecting member is connected to the first drive shaft or the second drive shaft; the second rotating connecting member is provided with a second external gear surface; the third transmission gear includes a third gear meshing with the first sun gear and a fourth gear meshing with the second external gear surface.

8. The power drive system according to claim 5, characterized in that: The power drive system also includes a third motor and a second gear set; the third motor is connected to a target drive shaft through the second gear set; the target drive shaft refers to another drive shaft of the first drive shaft and the second drive shaft except the drive shaft connected to the first gear set.

9. The power drive system according to claim 8, characterized in that: The second gear set includes a second sun gear, a second planetary gear and a second planet carrier, the third motor is connected to the second sun gear, the second planetary gear is mounted on the second planet carrier and meshes with the second sun gear, and the second planet carrier is connected to the target drive shaft; or The second gear set includes a second sun gear, a fourth transmission gear and a third rotating connecting member, the third motor is connected to the second sun gear, and the third rotating connecting member is connected to the target drive shaft; the third rotating connecting member is provided with a third external gear surface; the fourth transmission gear includes a fifth gear meshing with the second sun gear and a sixth gear meshing with the third external gear surface.

10. The power drive system according to any one of claims 1 to 9, characterized in that: The planetary assembly includes a third sun gear, a third planetary gear, an inner ring gear and a third planet carrier; the first motor is connected to the third sun gear, the third planetary gear is mounted on the third planet carrier and meshes with the third sun gear, and the inner ring gear is meshed with the third planetary gear; the engine is connected to the third planet carrier through the first coupling device, and the inner ring gear is connected to the first drive shaft and / or the second drive shaft through the transmission assembly.

11. The power drive system according to claim 10, characterized in that: The first coupling device includes a first brake, a second brake and a third clutch; the engine is connected to the third planet carrier via the third clutch; The first brake is connected to the third planet carrier and the housing, and the first brake is used to control the connection and disconnection between the third planet carrier and the housing; The second brake connects the inner gear ring and the housing, and is used to control the connection and disconnection between the inner gear ring and the housing.

12. The power drive system according to any one of claims 1 to 9, characterized in that: The planetary assembly includes a third sun gear, a third planetary gear, an inner ring gear and a fourth planet carrier; the first motor is connected to the third sun gear, the third planetary gear is mounted on the fourth planet carrier and meshes with the third sun gear, and the inner ring gear is meshed with the third planetary gear; the engine is connected to the inner ring gear through the first coupling device, and the fourth planet carrier is connected to the first drive shaft and / or the second drive shaft through the transmission assembly.

13. The power drive system according to claim 12, characterized in that: The first coupling device includes a third clutch, a first brake and a fourth clutch; the engine is connected to the inner gear ring through the third clutch; The first brake is connected to the inner gear ring and the housing, and the first brake is used to control the connection and disconnection between the inner gear ring and the housing; The fourth clutch connects the inner gear ring and the third sun gear, and the fourth clutch is used to control the connection and disconnection between the inner gear ring and the third sun gear.

14. A vehicle, characterized in that: Comprising a power drive system as described in any one of claims 1 to 13.

Images