Dual-motor purely-electrically-driven extended-range electric assembly and automobile

Abstract

The utility model relates to the technical field of automobiles, in particular to a dual-motor purely-electrically-driven extended-range electric assembly and an automobile, and the dual-motor purely-electrically-driven extended-range electric assembly comprises a generator, an engine, a synchronizer, a driving motor and a differential mechanism; the engine is connected with a first gear ring; the synchronizer is sleeved with a transmission shaft, the transmission shaft and the first gear ring are coaxially arranged, the transmission shaft is used for being connected with a generator, and a second gear ring is further arranged on the side, away from the first gear ring, of the synchronizer and hollowly sleeves the transmission shaft; the driving motor is connected with the second gear ring; the differential mechanism is used for being connected with the second gear ring and a driving motor. According to the dual-motor pure-electric-drive extended-range electric assembly, an automobile has multiple modes under the condition that the driving motor is not improved, the power requirements of different driving working conditions are met, meanwhile, the situation that a generator is in an idle and non-working state for a long time and cannot be effectively utilized is avoided, and the utilization rate of the generator is increased.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a dual-motor pure electric drive extended-range electric assembly and automobile. Background Art

[0002] The extended-range hybrid electric powertrain is mainly composed of an engine, a generator, a drive motor system and a transmission device. The range extender composed of the engine and the generator converts chemical energy into electrical energy and provides it to the drive motor to drive the vehicle. With the significant improvement of the power battery capacity of the extended-range hybrid vehicle, the pure electric driving mileage continues to increase, which correspondingly reduces the power generation demand of the range extender, making the working frequency of the engine and generator that make up the range extender lower and lower.

[0003] If extended-range electric vehicles rely solely on drive motors to meet the power requirements of different driving conditions, the drive motors will need to be designed with high performance, thereby increasing production costs. Utility Model Content

[0004] Based on this, a dual-motor pure electric drive extended-range electric assembly and a vehicle are provided. The dual-motor pure electric drive extended-range electric assembly enables the vehicle to have multiple modes without improving the drive motor, thereby meeting the power requirements of different driving conditions.

[0005] To this end, on the first aspect, an embodiment of the present application provides a dual-motor pure electric drive extended-range electric assembly, comprising: a generator; an engine connected to a first ring gear; a synchronizer sleeved with a transmission shaft, the transmission shaft being coaxially arranged with the first ring gear, the transmission shaft being used to be connected to the generator, a second ring gear being further arranged on the side of the synchronizer away from the first ring gear, the second ring gear being loosely sleeved on the transmission shaft; a drive motor being used to be connected to the second ring gear; and a differential being used to be connected to the second ring gear and the drive motor; in a first state, the synchronizer is disconnected from the first ring gear, and the synchronizer is disconnected from the second ring gear; in a second state, the synchronizer is engaged with the first ring gear, and the synchronizer is disconnected from the second ring gear; in a third state, the synchronizer is disconnected from the first ring gear, and the synchronizer is engaged with the second ring gear.

[0006] In one embodiment, it further includes a first gear and a second gear, the first gear is connected to the rotating shaft of the generator, the second gear is connected to the transmission shaft, and the first gear is meshed with the second gear.

[0007] In one embodiment, a third gear is further included, wherein the third gear is loosely mounted on the transmission shaft, and the second ring gear is fixed to the third gear.

[0008] In one embodiment, the diameter of the third gear is larger than the diameter of the second gear ring.

[0009] In one embodiment, it further includes a fourth gear, a fifth gear, a sixth gear, and a seventh gear. The fourth gear is connected to the drive motor, the fifth gear meshes with the gear of the differential, the sixth gear meshes with the third gear and the fourth gear respectively, and the seventh gear is coaxially arranged with the sixth gear and meshes with the fifth gear.

[0010] In one embodiment, it further includes a fourth gear, an eighth gear, a ninth gear, and a tenth gear. The fourth gear is connected to the drive motor, the eighth gear meshes with the third gear, there are two ninth gears both meshing with the gear of the differential, one ninth gear is coaxially arranged with the eighth gear, the other ninth gear is coaxially arranged with the tenth gear, and the tenth gear meshes with the fourth gear.

[0011] In one embodiment, the synchronizer is connected with a drive assembly, and the drive assembly is used to drive the movement of the synchronizer.

[0012] In one embodiment, the drive assembly is a hydraulic actuator or an electromagnetic actuator.

[0013] In one embodiment, the rotating shaft of the engine and the rotating shaft of the generator are arranged in parallel.

[0014] In a second aspect, an embodiment of the present application provides an automobile, including the range-extended electric powertrain with dual-motor pure-electric drive as described in any one of the above.

[0015] According to the dual-motor pure electric drive extended-range electric assembly and automobile provided in the embodiments of the present application, the dual-motor pure electric drive extended-range electric assembly includes a generator, an engine, a synchronizer, a drive motor and a differential; the engine is connected to a first ring gear; the synchronizer is sleeved with a transmission shaft, the transmission shaft is coaxially arranged with the first ring gear, the transmission shaft is used to be connected to the generator, and a second ring gear is also arranged on the side of the synchronizer away from the first ring gear, and the second ring gear is loosely sleeved on the transmission shaft; the drive motor is used to be connected to the second ring gear; the differential is used to be connected to the second ring gear and the drive motor; in a first state, the synchronizer is disconnected from the first ring gear, and the synchronizer is disconnected from the second ring gear; in a second state, the synchronizer is engaged with the first ring gear, and the synchronizer is disconnected from the second ring gear; in a third state, the synchronizer is disconnected from the first ring gear, and the synchronizer is engaged with the second ring gear. The dual-motor pure electric drive extended-range electric assembly of the present application enables the vehicle to have multiple modes without improving the drive motor, meeting the power requirements of different driving conditions. At the same time, it also avoids the situation where the generator is idle and not working for a long time and cannot be effectively utilized, thereby improving the utilization rate of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure diagram of the first dual-motor pure electric drive extended-range electric powertrain in the pure electric drive mode of the drive motor is shown;

[0017] Figure 2 The figure shows a schematic diagram of the structure of the first dual-motor pure electric drive extended-range electric powertrain in the extended-range mode;

[0018] Figure 3 The structure diagram of the first dual-motor pure electric drive extended-range electric powertrain in the generator pure electric drive mode is shown;

[0019] Figure 4 The structure diagram of the first dual-motor pure electric drive extended-range electric powertrain in the pure electric drive mode with the generator and the drive motor connected in parallel is shown;

[0020] Figure 5 Shown is a schematic structural diagram of a second type of dual-motor pure electric drive extended-range electric assembly.

[0021] Description of reference numerals:

[0022] 1. Generator; 11. First gear; 2. Engine; 3. Synchronizer; 31. First ring gear; 32. Second ring gear; 4. Drive motor; 41. Fourth gear; 5. Differential; 51. Fifth gear; 52. Seventh gear; 6. Transmission shaft; 61. Second gear; 62. Third gear; 7. Sixth gear; 8. Eighth gear; 9. Ninth gear; 10. Tenth gear. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of this application more clear and understandable, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0024] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the utility model. Therefore, only the components related to the utility model are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0025] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the utility model can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the utility model can produce and the objectives that can be achieved, should still fall within the scope covered by the technical content disclosed by the utility model.

[0026] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of 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 cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] If a range-extended electric vehicle only relies on the drive motor to meet the power requirements under different driving conditions, it will require the drive motor to be designed with high performance, resulting in an increase in production costs.

[0028] To solve the above problems, refer to Figures 1-4 , Figure 1 which shows the structural schematic diagram of the first type of range-extended electric powertrain with dual-motor pure electric drive in the pure electric drive mode of the drive motor, Figure 2 which shows the structural schematic diagram of the first type of range-extended electric powertrain with dual-motor pure electric drive in the range-extended mode, Figure 3 which shows the structural schematic diagram of the first type of range-extended electric powertrain with dual-motor pure electric drive in the pure electric drive mode of the generator, Figure 4 which shows the structural schematic diagram of the first type of range-extended electric powertrain with dual-motor pure electric drive in the parallel pure electric drive mode of the generator and the drive motor.

[0029] The present application provides a range-extended electric powertrain with dual-motor pure electric drive. The range-extended electric powertrain with dual-motor pure electric drive includes a generator 1, an engine 2, a synchronizer 3, a drive motor 4, and a differential 5. The engine 2 is connected to a first ring gear 31. The synchronizer 3 is sleeved on a transmission shaft 6. The transmission shaft 6 is coaxially arranged with the first ring gear 31 and is used to be connected to the generator 1. On the side of the synchronizer 3 facing away from the first ring gear 31, a second ring gear 32 is further provided. The second ring gear 32 is idly sleeved on the transmission shaft 6. The drive motor 4 is used to be connected to the second ring gear 32. The differential 5 is used to be connected to the second ring gear 32 and the drive motor 4. In the first state, the synchronizer 3 is disconnected from the first ring gear 31 and the synchronizer 3 is disconnected from the second ring gear 32. In the second state, the synchronizer 3 is engaged with the first ring gear 31 and the synchronizer 3 is disconnected from the second ring gear 32. In the third state, the synchronizer 3 is disconnected from the first ring gear 31 and the synchronizer 3 is engaged with the second ring gear 32.

[0030] It should be understood that the rotating shaft of the engine 2 is coaxially arranged with the first ring gear 31 and the rotating shaft of the engine 2 is connected to the first ring gear 31. When the rotating shaft of the engine 2 rotates, the first ring gear 31 rotates. The present application further includes a transmission shaft 6. The transmission shaft 6 is coaxially arranged with the rotating shaft of the engine 2. The transmission shaft 6 is not connected to the rotating shaft of the engine 2. The synchronizer 3 is sleeved on the transmission shaft 6 and is fixed to the transmission shaft 6. The synchronizer 3 is coaxially arranged with the transmission shaft 6. The synchronizer 3 can move along the length direction of the transmission shaft 6. When the synchronizer 3 rotates, the transmission shaft 6 rotates, or when the transmission shaft 6 rotates, the synchronizer 3 rotates.

[0031] On the side of the synchronizer 3 facing away from the first ring gear 31, a second ring gear 32 is further provided. The second ring gear 32 is idly sleeved on the transmission shaft 6 and is coaxially arranged with the transmission shaft 6. However, the rotation of the first ring gear 31 has nothing to do with the transmission shaft 6. The synchronizer 3 is located between the first ring gear 31 and the second ring gear 32. The synchronizer 3 can choose to be engaged with the first ring gear 31, or can choose to be engaged with the second ring gear 32, or can also choose not to be engaged with either the first ring gear 31 or the second ring gear 32.

[0032] The drive motor 4 is used to be connected to the second ring gear 32, that is, the drive motor 4 can drive the second ring gear 32 to rotate. The differential 5 rotates with the second ring gear 32 and the drive motor 4, that is, the rotation of the differential 5 can be driven by the rotation of the second ring gear 32 or can be driven by the drive motor 4. The differential 5 transmits the driving force to the drive wheels through half shafts.

[0033] Refer to Figure 1, in the first state, that is, in the pure electric drive mode of the drive motor 4, the synchronizer 3 is disengaged from the first gear ring 31 and the synchronizer 3 is disengaged from the second gear ring 32; the engine 2 and the generator 1 do not work, and the drive motor 4 works. The power of the drive motor 4 is transmitted to the differential 5, and the differential 5 transmits the driving force to the drive wheels through the half shafts, thereby driving the vehicle to travel.

[0034] Referring to Figure 2 , in the second state, that is, in the range extender mode, the synchronizer 3 is engaged with the first gear ring 31, the synchronizer 3 is disengaged from the second gear ring 32, and the engine 2, the generator 1 and the drive motor 4 all work. The power of the engine 2 is transmitted to the generator 1 through the first gear ring 31, the synchronizer 3 and the transmission shaft 6 for power generation, and the electric energy is transmitted to the power battery and / or the drive motor 4. The power of the drive motor 4 is transmitted to the differential 5, and the differential 5 transmits the driving force to the drive wheels through the half shafts, thereby driving the vehicle to travel.

[0035] Referring to Figure 3 and Figure 4 , in the third state, the synchronizer 3 is disengaged from the first gear ring 31, the synchronizer 3 is engaged with the second gear ring 32, and there are a pure electric drive mode of the generator 1 and a parallel pure electric drive mode of the generator 1 and the drive motor 4.

[0036] Referring to Figure 3 , in the pure electric drive mode of the generator 1, the synchronizer 3 is engaged with the second gear ring 32, the engine 2 and the drive motor 4 do not work, and the generator 1 works. The power of the generator 1 is transmitted to the half shafts through the synchronizer 3, the second gear ring 32 and the differential 5, thereby driving the vehicle alone.

[0037] Referring to Figure 4 , in the parallel pure electric drive mode of the generator 1 and the drive motor 4, the synchronizer 3 is engaged with the second gear ring 32, the engine 2 does not work, and the generator 1 and the drive motor 4 work. The power of the generator 1 is transmitted to the half shafts through the synchronizer 3, the second gear ring 32 and the differential 5, and the power of the drive motor 4 is transmitted to the half shafts through the differential 5, thereby jointly driving the vehicle to travel.

[0038] The range extender electric powertrain with dual-motor pure electric drive of the present application enables the vehicle to have four modes without improving the drive motor 4, meeting the power requirements of different driving conditions. At the same time, it also avoids the situation that the generator 1 is in a long-term idle state and cannot be effectively utilized, improving the utilization rate of the generator 1.

[0039] Referring to Figures 1-4, in some alternative embodiments, it further includes a first gear 11 and a second gear 61. The first gear is connected to the rotating shaft of the generator 1, the second gear 61 is connected to the transmission shaft 6, and the first gear 11 meshes with the second gear 61. The first gear 11 is connected to the rotating shaft of the generator 1, and the rotation of the rotating shaft of the generator 1 drives the first gear 11 to rotate. The second gear 61 is connected to the transmission shaft 6, and when the second gear 61 rotates, it can drive the transmission shaft 6 to rotate, and the rotation of the transmission shaft 6 can also drive the second gear 61 to rotate. The first gear 11 meshes with the second gear 61, and there is no limitation on the sizes of the first gear 11 and the second gear 61 here, which are set according to actual requirements. When the first gear 11 rotates, it can drive the second gear 61 to rotate, and the rotation of the second gear 61 can also drive the first gear 11 to rotate.

[0040] In some alternative embodiments, it further includes a third gear 62. The third gear 62 is sleeved on the transmission shaft 6 loosely, and the second gear ring 32 is fixed to the third gear 62. The third gear 62 is coaxially arranged with the transmission shaft 6, and the third gear 62 is not fixed to the transmission shaft 6, that is, the rotation of the transmission shaft 6 does not affect the rotation of the third gear 62. The second gear ring 32 is fixed to the third gear 62, and when the second gear ring 32 rotates, it can drive the third gear 62 to rotate.

[0041] In some alternative embodiments, the diameter of the third gear 62 is larger than that of the second gear ring 32. Thus, it is convenient to fix the second gear ring 32 at the third gear 62, improving the installation stability of the second gear ring 32 and the third gear 62. And it can also make the number of teeth of the third gear 62 different from that of the second gear ring 32, so as to facilitate the adjustment of the motion situation. The specific number of teeth is set according to the actual situation, and there is no limitation in this application.

[0042] In some alternative embodiments, it further includes a fourth gear 41, a fifth gear 51, a sixth gear 7, and a seventh gear 52. The fourth gear 41 is connected to the drive motor 4, the fifth gear 51 meshes with the gear of the differential 5, the sixth gear 7 meshes with both the third gear 62 and the fourth gear 41, and the seventh gear 52 is coaxially arranged with the sixth gear 7 and meshes with the fifth gear 51. The fourth gear 41 is connected to the rotating shaft of the drive motor 4, and the drive motor 4 can drive the fourth gear 41 to rotate. The fifth gear 51 meshes with the gear of the differential 5, and the fifth gear 51 can drive the differential 5 to move.

[0043] The sixth gear 7 meshes with both the third gear 62 and the fourth gear 41. The third gear 62 can drive the sixth gear 7 to rotate, and the fourth gear 41 can also drive the sixth gear 7 to rotate. The specific situation is set according to the required working conditions. The seventh gear 52 is coaxially arranged with the sixth gear 7, that is, the rotation of the sixth gear 7 can drive the seventh gear 52 to rotate. The seventh gear 52 meshes with the fifth gear 51, and the rotation of the seventh gear 52 can drive the fifth gear 51 to rotate, thereby transmitting the driving force to the differential 5.

[0044] The mating arrangement of the sixth gear 7 and the seventh gear 52 in this application reduces the number of gears, and decreases the volume and production cost of the range extender electric assembly with dual-motor pure electric drive in this application.

[0045] Refer to Figure 5 , Figure 5 which shows a schematic structural diagram of a second range extender electric assembly with dual-motor pure electric drive. In some alternative embodiments, it further includes a fourth gear 41, an eighth gear 8, a ninth gear 9, and a tenth gear 10. The fourth gear 41 is connected to the drive motor 4. The eighth gear 8 meshes with the third gear 62. There are two ninth gears 9, both of which mesh with the gears of the differential 5. One ninth gear 9 is coaxially arranged with the eighth gear 8, and the other ninth gear 9 is coaxially arranged with the tenth gear 10, and the tenth gear 10 meshes with the fourth gear 41.

[0046] The eighth gear 8 meshes with the third gear 62. When the third gear 62 rotates, it can drive the eighth gear 8 to rotate. The eighth gear 8 is coaxially arranged with one of the ninth gears 9. The rotation of the eighth gear 8 can drive the ninth gear 9 to rotate. The ninth gear 9 meshes with the gears of the differential 5. The rotation of the ninth gear 9 can drive the gears of the differential 5 to rotate, that is, transmit the driving force to the differential 5.

[0047] The tenth gear 10 meshes with the fourth gear 41. The rotation of the fourth gear 41 drives the tenth gear 10 to rotate. The tenth gear 10 rotates coaxially with the other ninth gear 9. The rotation of the tenth gear 10 can drive the ninth gear 9 to rotate. The rotation of the ninth gear 9 can drive the gears of the differential 5 to rotate, that is, the ninth gear 9 can transmit the driving force to the differential 5.

[0048] In this application, the driving forces at the third gear 62 and the drive motor 4 are respectively fed back to the differential 5 through the eighth gear 8, the ninth gear 9, and the tenth gear 10, so that the gears are not shared, reducing the occurrence of the situation where the vehicle cannot run due to gear damage, and ensuring the normal operation of the vehicle.

[0049] In some alternative embodiments, the synchronizer 3 is connected to a drive assembly (not shown in the figure), and the drive assembly is used to drive the movement of the synchronizer 3. The drive assembly can drive the synchronizer 3 to move towards the first gear ring 31 to engage with the first gear ring 31; it can also drive the synchronizer 3 to move towards the second gear ring 32 to engage with the second gear ring 32, or drive the synchronizer 3 to be located between the first gear ring 31 and the second gear ring 32, and the synchronizer 3 does not engage with the first gear ring 31 and the second gear ring 32.

[0050] In some alternative embodiments, the drive assembly is a hydraulic actuator or an electromagnetic actuator. In one example, the drive assembly may be a hydraulic actuator. In one example, the drive assembly is an electromagnetic actuator.

[0051] Referring to Figures 1-5 , in some alternative embodiments, the rotating shaft of the engine 2 and the rotating shaft of the generator 1 are arranged in parallel. That is, the engine 2 and the generator 1 are arranged with different axes. In this way, the lateral length of the transmission assembly can be reduced, and further the lateral occupied space of the transmission assembly can be decreased, making the structure more compact and being beneficial to the assembly of the whole vehicle.

[0052] Referring to Figures 1-5 , this application further includes an automobile, and the automobile includes the range-extended electric powertrain with dual-motor pure electric drive described in any one of the above.

[0053] The range-extended electric powertrain with dual-motor pure electric drive includes a generator 1, an engine 2, a synchronizer 3, a drive motor 4 and a differential 5. The engine 2 is connected with a first ring gear 31; the synchronizer 3 is sleeved with a transmission shaft 6, and the transmission shaft 6 is coaxially arranged with the first ring gear 31. The transmission shaft 6 is used for connecting with the generator 1. On the side of the synchronizer 3 facing away from the first ring gear 31, a second ring gear 32 is further arranged, and the second ring gear 32 is sleeved on the transmission shaft 6 loosely; the drive motor 4 is used for connecting with the second ring gear 32; the differential 5 is used for connecting with the second ring gear 32 and the drive motor 4; in the first state, the synchronizer 3 is disconnected from the first ring gear 31, and the synchronizer 3 is disconnected from the second ring gear 32; in the second state, the synchronizer 3 is engaged with the first ring gear 31, and the synchronizer 3 is disconnected from the second ring gear 32; in the third state, the synchronizer 3 is disconnected from the first ring gear 31, and the synchronizer 3 is engaged with the second ring gear 32.

[0054] The range-extended electric powertrain with dual-motor pure electric drive of this application enables the automobile to have multiple modes without improving the drive motor 4, meeting the power requirements of different driving conditions. At the same time, it also avoids the situation that the generator 1 is in a long-term idle state and cannot be effectively utilized, improving the utilization rate of the generator 1.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A range-extended electric powertrain with dual-motor pure electric drive, characterized in that, include: Generator (1); An engine (2) connected to a first ring gear (31); A synchronizer (3) is sleeved with a transmission shaft (6), the transmission shaft (6) is coaxially arranged with the first gear ring (31), the transmission shaft (6) is used to connect with the generator (1), and a second gear ring (32) is further arranged on a side of the synchronizer (3) away from the first gear ring (31), and the second gear ring (32) is sleeved on the transmission shaft (6); A driving motor (4), configured to be connected to the second gear ring (32); as well as A differential (5) used for connecting to the second gear ring (32) and the drive motor (4); In a first state, the synchronizer (3) is disconnected from the first ring gear (31), and the synchronizer (3) is disconnected from the second ring gear (32); In the second state, the synchronizer (3) is engaged with the first ring gear (31), and the synchronizer (3) is disconnected from the second ring gear (32); In the third state, the synchronizer (3) is disconnected from the first ring gear (31), and the synchronizer (3) is engaged with the second ring gear (32).

2. The range-extended electric powertrain with dual-motor pure electric drive according to claim 1, characterized in that, It also comprises a first gear (11) and a second gear (61), wherein the first gear (11) is connected to the rotating shaft of the generator (1), and the second gear (61) is connected to the transmission shaft (6), and the first gear (11) is meshed with the second gear (61).

3. The range-extended electric powertrain with dual-motor pure electric drive according to claim 1, wherein It also includes a third gear (62), wherein the third gear (62) is loosely sleeved on the transmission shaft (6), and the second gear ring (32) is fixed to the third gear (62).

4. The range-extended electric powertrain with dual-motor pure electric drive according to claim 3, wherein The diameter of the third gear (62) is greater than the diameter of the second gear ring (32).

5. The range-extended electric powertrain with dual-motor pure electric drive according to claim 3, characterized in that, The invention also comprises a fourth gear (41), a fifth gear (51), a sixth gear (7) and a seventh gear (52), wherein the fourth gear (41) is connected to the drive motor (4), the fifth gear (51) is meshed with the gear of the differential (5), the sixth gear (7) is meshed with the third gear (62) and the fourth gear (41) respectively, and the seventh gear (52) is coaxially arranged with the sixth gear (7) and meshed with the fifth gear (51).

6. The range-extended electric powertrain with dual-motor pure electric drive according to claim 3, wherein The invention also comprises a fourth gear (41), an eighth gear (8), a ninth gear (9) and a tenth gear (10), wherein the fourth gear (41) is connected to the drive motor (4), the eighth gear (8) is meshed with the third gear (62), two ninth gears (9) are provided and both are meshed with the gears of the differential (5), one of the ninth gears (9) is coaxially arranged with the eighth gear (8), the other of the ninth gears (9) is coaxially arranged with the tenth gear (10), and the tenth gear (10) is meshed with the fourth gear (41).

7. The range-extended electric powertrain with dual-motor pure electric drive according to claim 1, wherein The synchronizer (3) is connected to a driving component, and the driving component is used to drive the movement of the synchronizer (3).

8. The range-extended electric powertrain with dual-motor pure electric drive according to claim 7, characterized in that, The driving assembly is a hydraulic actuator or an electromagnetic actuator.

9. The range-extended electric powertrain with dual-motor pure electric drive according to claim 1, characterized in that, The rotating shaft of the engine (2) is arranged in parallel with the rotating shaft of the generator (1).

10. A vehicle, characterized in that, It includes a range-extended electric assembly with dual-motor pure electric drive as described in any one of claims 1-9.

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