Power driving mechanism and vehicle

Abstract

The utility model provides a power driving mechanism and a vehicle, the power driving mechanism comprises a first half shaft and a second half shaft, a sun gear of a planetary gear train is arranged on the second half shaft, a planet carrier of the planetary gear train is arranged on the first half shaft and is connected with a first transmission unit, and a second transmission unit is arranged on the second half shaft. A gear ring of the planetary gear train is connected with the second transmission unit, a first synchronizer selectively connected with the first transmission unit or the second transmission unit is arranged on the output shaft, and the output shaft is used for being in transmission connection with a differential mechanism. According to the power driving mechanism, the overall structure is compact, the power of the first power source and the power of the second power source can be transmitted to the output shaft independently, can also be transmitted to the output shaft after being converged, or can be transmitted between the first power source and the second power source, and therefore the power driving mechanism can achieve multiple driving modes.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power systems, and in particular to a power drive mechanism. Meanwhile, the utility model also relates to a vehicle using the power drive mechanism. Background Art

[0002] A vehicle is usually a non-track-borne vehicle that is powered by power and has four or more wheels. It is mainly used to carry people and / or goods, and to perform certain specific operations. According to the power source, vehicles are divided into fuel vehicles, electric vehicles, hybrid vehicles, etc.

[0003] The power drive mechanism on a vehicle refers to the mechanism that provides power for the vehicle, and is mainly composed of two parts: a power source system and a gearbox system. The power source may be, for example, an engine and / or a motor. When the power source is an engine, the vehicle is a fuel vehicle, when the power source is an engine and a motor, the vehicle is a hybrid vehicle, and when the power source is a motor, the vehicle is an electric vehicle.

[0004] The gearbox is one of the most important components in the automobile transmission system. Its main function is to change the transmission ratio and expand the range of variation of the drive wheel torque and speed to adapt to the traction needs of different driving conditions, make the engine work under favorable conditions as much as possible, and meet the needs of vehicle driving, reversing, parking and special conditions (such as towing or driving on slopes).

[0005] In existing gearboxes, each gear is usually achieved by using a gear pair. The gear pair mentioned here generally includes a driving gear arranged on the input shaft, and a driven gear arranged on the output shaft. The driving gear and the driven gear are meshed and connected to achieve a transmission connection between the input shaft and the output shaft.

[0006] In addition, some gearboxes are integrated with planetary gear trains, because the planetary gear train has high transmission efficiency, and the meshing points of the planetary gears are distributed on the entire gear, which can withstand greater torque, thereby reducing transmission losses, which helps to improve the power performance and fuel economy of the vehicle. However, in existing gearboxes with planetary gear trains, power is generally output from one of the planet carrier and the ring gear, making the gearbox with a planetary gear train compact and able to achieve a larger transmission ratio in a limited space, thereby meeting the requirements of the automobile transmission system for high and low speed ratios.

[0007] However, with the advancement and development of science and technology, people have higher and higher requirements on the compactness of the gearbox structure and the power of the vehicle, smooth shifting and other performance. Regardless of the above existing gearbox, there is still room for optimization in its structure. Utility Model Content

[0008] In view of this, the utility model aims to provide a power drive mechanism to make its overall structure more compact, occupy less space, and have more drive modes.

[0009] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0010] A power drive mechanism comprises an input shaft, a planetary gear train and an output shaft, wherein:

[0011] The input shaft includes a first half shaft and a second half shaft;

[0012] The sun gear of the planetary gear train is arranged on the second half shaft, the planet gear of the planetary gear train is arranged on the first half shaft and is transmission-connected to the first transmission unit, and the ring gear of the planetary gear train is transmission-connected to the second transmission unit.

[0013] The output shaft is provided with a first synchronizer, the first synchronizer is selectively connected to the first transmission unit, and the planet carrier is in transmission connection with the output shaft; the first synchronizer is selectively connected to the second transmission unit, and the ring gear is in transmission connection with the output shaft;

[0014] The output shaft is used for driving connection with the differential.

[0015] Furthermore, the first transmission unit includes a first driven gear loosely mounted on the output shaft, the planet carrier is meshed and connected with the first driven gear, and the first synchronizer can selectively connect to the first driven gear.

[0016] Further, the second transmission unit comprises a second driving gear loosely sleeved on the second half shaft and a second driven gear loosely sleeved on the output shaft, the second driving gear and the second driven gear are meshed and connected, and the ring gear is connected to the second driving gear;

[0017] The input shaft is provided with a second synchronizer, and the second synchronizer can be selectively connected to the second driving gear;

[0018] The first synchronizer is capable of selectively connecting with the second driven gear.

[0019] Furthermore, the first transmission unit includes a first driven gear loosely mounted on the output shaft, the ring gear is meshed and connected with the first driven gear, and the first synchronizer can selectively connect to the first driven gear.

[0020] Further, the second transmission unit comprises a second driving gear loosely sleeved on the second half shaft and a second driven gear loosely sleeved on the output shaft, the second driving gear and the second driven gear are meshed and connected, and the planet carrier is connected to the second driving gear;

[0021] The first synchronizer is capable of selectively connecting with the second driven gear.

[0022] Further, the first power source includes an engine, and the second power source includes a first motor;

[0023] The engine and the first motor are disposed at two ends of the input shaft; and / or,

[0024] The engine is directly connected to the first half shaft, and the first motor is directly connected to the second half shaft.

[0025] Furthermore, the output shaft is provided with an output gear, the output gear is used for driving connection with the differential, and the output gear is arranged on a side of the output shaft close to the engine.

[0026] Furthermore, it also includes a second motor, and the power output shaft of the second motor is drivingly connected to the output shaft.

[0027] Furthermore, the power output shaft of the second motor is transmission-connected to the output shaft via a gear pair, and the gear pair is arranged on a side of the output shaft away from the engine;

[0028] The gear pair includes a third driving gear arranged on the power output shaft of the second motor, and a third driven gear arranged on the output shaft, and the third driving gear and the third driven gear are meshed and connected.

[0029] Compared with the prior art, the utility model has the following advantages:

[0030] The power drive mechanism described in the utility model can provide power through the first power source and the second power source respectively by connecting the first power source and the second power source to the first half-shaft and the second half-shaft respectively, and the planetary carrier and the ring gear of the planetary gear system can respectively use the first transmission unit and the second transmission unit, and select the first transmission unit or the second transmission unit based on the first synchronizer to achieve transmission connection with the output shaft. The overall structure is compact, and the power of the first power source and the second power source can be transmitted to the output shaft separately, or can be transmitted to the output shaft after merging, or can be transmitted between the first power source and the second power source, so that the power drive mechanism can achieve more driving modes.

[0031] In addition, the first transmission unit includes a first driven gear meshing with the planet carrier, which makes the structure simple, and the second transmission unit includes a second driving gear and a second driven gear, and a second synchronizer is provided to facilitate the transmission of power on the second half shaft to the output shaft.

[0032] In addition, the first transmission unit includes a first driven gear meshing with the ring gear, which makes the structure simple, and the second transmission unit includes a second driving gear and a second driven gear, which facilitates the transmission of power on the first half shaft to the output shaft to achieve another gear.

[0033] Setting the first power source as the engine and the second power source as the first motor is conducive to realizing the engine driving mode and the hybrid driving mode driven by the engine and the first motor. It can also realize the power generation mode driven by the engine and the first motor. The first motor can also be used as the starting motor of the engine. The engine is directly connected to the first half shaft, and the first motor is directly connected to the second half shaft, all of which are to make the overall structure compact, with fewer parts, lighter weight and lower cost.

[0034] As for the output gear, it is convenient for the power transmitted to the output shaft in each gear to be transmitted to the differential. The second motor can cooperate with the first power source (engine) and the second power source (first motor) to achieve more driving modes, such as pure electric driving mode. The gear pair is convenient for the arrangement of the second motor, and is conducive to changing the transmission ratio, which is conducive to improving the stability of power transmission.

[0035] Another object of the utility model is to provide a vehicle, which is provided with the power drive mechanism and the third motor as described above, wherein the power drive mechanism is drivingly connected to one drive axle of the vehicle, and the power output end of the third motor is drivingly connected to the other drive axle of the vehicle.

[0036] The vehicle described in the utility model has a compact overall structure by applying the above power drive mechanism. The power of the first power source and the second power source can be transmitted to the output shaft separately, or can be transmitted to the output shaft after being combined, or can be transmitted between the first power source and the second power source, so that the power drive mechanism can realize more driving modes, which is beneficial to improving the range of choices and driving comfort of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0038] Figure 1 This is a schematic diagram of the structure of the power drive mechanism described in Embodiment 1 of the present utility model;

[0039] Figure 2 This is a schematic structural diagram of another power drive mechanism described in Example 1 of the utility model.

[0040] Description of reference numerals:

[0041] 11. engine; 12. first motor; 13. second motor; 1301. third driving gear;

[0042] 101, first half shaft; 102, second half shaft; 1021, second driving gear;

[0043] 2. Output shaft; 201. First driven gear; 202. Second driven gear; 203. Output gear; 204. Third driven gear;

[0044] 301, sun gear; 302, planetary gear; 303, ring gear; 304, planet carrier;

[0045] 4. First synchronizer; 5. Second synchronizer; 6. Differential. DETAILED DESCRIPTION

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship shown in the accompanying drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0049] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0050] Embodiment 1

[0051] This embodiment relates to a power drive mechanism, which, compared with the existing gearbox, especially the gearbox with two gears, has a more compact overall structure, occupies less space, and has more driving modes.

[0052] Based on the above design concept, an exemplary structure of the power drive mechanism of this embodiment is as follows: Figure 1 As shown, in terms of overall structure, the power drive mechanism of this embodiment mainly includes an input shaft, a planetary gear system and an output shaft 2.

[0053] Specifically, the input shaft includes a first half-shaft 101 and a second half-shaft 102. Preferably, the first half-shaft 101 and the second half-shaft 102 are coaxially arranged. The first half-shaft 101 is used for transmission connection with the power output end of the first power source, so that the power of the first power source can be transmitted to the first half-shaft 101, and the second half-shaft 102 is used for transmission connection with the power output end of the second power source, so that the power of the second power source can be transmitted to the second half-shaft 102.

[0054] The planetary gear system can adopt any existing planetary gear system. In this embodiment, a single-row single-stage planetary gear system is taken as an example for explanation. It mainly includes a sun gear 301, a plurality of planetary gears 302 arranged circumferentially of the sun gear 301 and meshing with the sun gear 301, a ring gear 303 meshing with each planetary gear 302, and a planet carrier 304 for mounting each planetary gear 302.

[0055] In a preferred embodiment, the sun gear 301 of the planetary gear train is arranged on the second half shaft 102, the planet carrier 304 of the planetary gear train is arranged on the first half shaft 101, and the planet carrier 304 is transmission-connected to the first transmission unit, and the ring gear 303 of the planetary gear train is transmission-connected to the second transmission unit, so that the planet carrier 304 and the first transmission unit can transmit power to each other, and the ring gear 303 and the second transmission unit can transmit power to each other.

[0056] In this embodiment, a first synchronizer 4 is provided on the output shaft 2, and the first synchronizer 4 is selectively connected to the first transmission unit, so that the planetary carrier 304 can be transmission-connected to the output shaft 2 through the first transmission unit and the first synchronizer 4, and the first synchronizer 4 is selectively connected to the second transmission unit, and the ring gear 303 can be transmission-connected to the output shaft 2 through the second transmission unit and the first synchronizer 4. When the first synchronizer 4 is neither connected to the first transmission unit nor to the second transmission unit, the power of the first half shaft 101 and the power of the second half shaft 102 can be transmitted through the planetary gear system, and the aforementioned output shaft 2 is used for transmission connection with the differential 6, so that the power transmitted to the output shaft 2 can be transmitted to the differential 6, which is convenient for driving the vehicle.

[0057] As a preferred embodiment, still refer to Figure 1As shown, the first transmission unit includes a first driven gear 201 loosely mounted on the output shaft 2, the planetary carrier 304 is meshed and connected to the first driven gear 201, and the first synchronizer 4 can selectively connect to the first driven gear 201, so that the power on the first half shaft 101 can be transmitted to the output shaft 2 through the planetary carrier 304, the first driven gear 201, and the first synchronizer 4.

[0058] As a preferred embodiment, the second transmission unit includes a second driving gear 1021 loosely sleeved on the second half shaft 102 and a second driven gear 202 loosely sleeved on the output shaft 2, the second driving gear 1021 and the second driven gear 202 are meshed and connected, and the ring gear 303 is connected to the second driving gear 1021. A second synchronizer 5 is provided on the input shaft, and the second synchronizer 5 can selectively connect to the second driving gear 1021, and the first synchronizer 4 can selectively connect to the second driven gear 202.

[0059] When the first synchronizer 4 is connected to the second driven gear 202 and the second synchronizer 5 is not connected to the second driving gear 1021, the power transmitted to the ring gear 303 can be transmitted to the output shaft 2 through the second driving gear 1021, the second driven gear 202 and the first synchronizer 4. When the first synchronizer 4 is connected to the second driven gear 202 and the second synchronizer 5 is connected to the second driving gear 1021, the power on the second half shaft 102 can be transmitted to the output shaft 2 through the second synchronizer 5, the second driving gear 1021 and the second driven gear 202.

[0060] In the above structure, the first transmission unit includes a first driven gear 201 meshing with the planet carrier 304, which makes the structure simple, and the second transmission unit includes a second driving gear 1021 and a second driven gear 202, and a second synchronizer 5 is provided to facilitate the transmission of power on the ring gear 103 and the second half shaft 102 to the output shaft 2.

[0061] As a preferred embodiment, the first power source includes an engine 11, the second power source includes a first motor 12, and the engine 11 and the first motor 12 are disposed at both ends of an input shaft. For example, in this embodiment, the power output shaft of the engine 11 is connected to an end of the first half shaft 101 away from the second half shaft 102, and the first motor 12 is connected to the first end of the second half shaft 102 away from the first half shaft 101.

[0062] Here, the first power source is set to the engine 11, and the second power source is set to the first motor 12, which is conducive to realizing the engine 11 driving mode and the hybrid driving mode driven by the engine 11 and the first motor 12. It can also realize the power generation mode driven by the engine 11 and the first motor 12. The first motor 12 can also be used as a starting motor for the engine 11.

[0063] As a preferred embodiment, the engine 11 is directly connected to the first half shaft 101, and the first motor 12 is directly connected to the second half shaft 102. Such an arrangement is intended to make the overall structure compact, with fewer parts, lighter weight and lower cost.

[0064] As a preferred embodiment, continue to refer to Figure 1 As shown, the output shaft 2 is provided with an output gear 203, and the output gear 203 is used for driving connection with the differential 6. The output gear 203 provided here facilitates the transmission of power from each gear to the output shaft 2 to the differential 6, making the overall structure simple and compact, convenient for layout, and conducive to realizing more gear modes. Preferably, the output gear 203 is provided on the side of the output shaft 2 close to the engine 11 to further facilitate the overall layout.

[0065] As a preferred embodiment, still refer to Figure 1 As shown, the power drive mechanism of this embodiment further includes a second motor 13, and the power output shaft of the second motor 13 is transmission-connected with the output shaft 2. Here, the second motor 13 can cooperate with the first power source (engine 11) and the second power source (first motor 12) to realize more driving modes, such as a pure electric driving mode.

[0066] As a preferred embodiment, the power output shaft of the second motor 13 is connected to the output shaft 2 through a gear pair. The gear pair arranged here makes the arrangement of the second motor 13 convenient, and is conducive to changing the transmission ratio, thereby improving the smoothness of power transmission.

[0067] In a preferred embodiment, the gear pair is arranged on a side of the output shaft 2 away from the engine 11 to facilitate the overall layout, and specifically, the gear pair includes a third driving gear 1301 arranged on the power output shaft of the second motor 13, and a third driven gear 204 arranged on the output shaft 2. The third driving gear 1301 is specifically fixed on the power output shaft of the second motor 13, and the third driven gear 204 is specifically fixed on the output shaft 2, and the third driving gear 1301 and the third driven gear 204 are meshed and connected, so that the power of the second motor 13 can be transmitted to the output shaft 2 through the third driving gear 1301 and the third driven gear 204.

[0068] It should be understood that the third driving gear 1301 can be loosely mounted on the power output shaft of the second motor 13, and a synchronizer that can selectively connect to the third driving gear 1301 can be provided on the power output shaft of the second motor 13. The third driven gear 204 can also be loosely mounted on the output shaft 2, and a synchronizer that can selectively connect to the third driven gear 204 can be provided on the output shaft 2.

[0069] like Figure 1The power drive mechanism shown has achievable drive modes as shown in Table 1.

[0070] Table 1:

[0071]

[0072]

[0073] It should be noted here that the first column is the driving modes that can be achieved by the power drive mechanism, from top to bottom, they are pure electric mode, series mode, power split mode, the first direct drive mode and the second direct drive mode.

[0074] The second column represents Figure 1 In the state shown, the connection position of the first synchronizer 4, "middle" represents that the first synchronizer 4 is neither connected to the first driven gear 201 nor to the second driven gear 202, "left" represents that the first synchronizer 4 is connected to the first driven gear 201, "right" represents that the first synchronizer 4 is connected to the second driven gear 202, and the third column represents Figure 1 In the connection position of the second synchronizer 5 in the state shown, “middle” represents that the second synchronizer 5 is not connected to the second driving gear 1021 , and “left” represents that the second synchronizer 5 is connected to the second driving gear 1021 .

[0075] In the third to sixth columns of Table 2, “√” represents that the corresponding power source is in the started state, “×” represents that the corresponding power source is in the shut-down state, and “○” represents that the corresponding power source can be in either the started state or the shut-down state.

[0076] The power drive mechanism of this embodiment can provide power through the first power source and the second power source respectively by connecting the first power source and the second power source to the first half shaft 101 and the second half shaft 102 respectively, and the planet carrier 304 and the ring gear 303 of the planetary gear system can respectively use the first transmission unit and the second transmission unit, and select the first transmission unit or the second transmission unit based on the first synchronizer 4 to achieve transmission connection with the output shaft 2. The overall structure is compact, and the power of the first power source and the second power source can be transmitted to the output shaft 2 separately, or can be transmitted to the output shaft 2 after merging, or can be transmitted between the first power source and the second power source, so that the power drive mechanism can achieve more driving modes.

[0077] Embodiment 2

[0078] This embodiment relates to a power drive mechanism, such as Figure 2 As shown, it has substantially the same structure as the power drive mechanism of the first embodiment, the main difference being the first power transmission unit and the second power transmission unit, and the power drive mechanism in this embodiment omits the second synchronizer 5 .

[0079] As a preferred embodiment, the first transmission unit includes a first driven gear 201 loosely mounted on the output shaft 2, the ring gear 303 is meshed and connected with the first driven gear 201, and the first synchronizer 4 can selectively connect to the first driven gear 201, so that the power of the ring gear 303 can be transmitted to the output shaft 2 through the first driven gear 201 and the first synchronizer 4.

[0080] As a preferred embodiment, the second transmission unit includes a second driving gear 1021 loosely mounted on the second half shaft 102 and a second driven gear 202 loosely mounted on the output shaft 2, the second driving gear 1021 and the second driven gear 202 are meshed and connected, the planetary carrier 304 is connected to the second driving gear 1021, and the first synchronizer 4 can be selectively connected to the second driven gear 202, so that the power of the first half shaft 101 can be transmitted to the output shaft 2 through the planetary carrier 304, the second driving gear 1021, the second driven gear 202 and the second synchronizer 5.

[0081] In the power drive mechanism of this embodiment, the first transmission unit includes a first driven gear 201 meshing with the ring gear 303, which makes the structure simple, and the second transmission unit includes a second driving gear 1021 and a second driven gear 202, which facilitates the transmission of power on the first half shaft 101 to the output shaft 2 to achieve another gear.

[0082] like Figure 2 The power drive mechanism shown has achievable drive modes as shown in Table 2.

[0083] Table 2:

[0084] model First synchronizer engine First Motor Second motor Pure Electric middle × × √ Power split Left √ √ ○ Direct drive right √ × ○

[0085] The power drive mechanism of this embodiment has substantially the same effect as the power drive mechanism of the first embodiment, and will not be described in detail here. In addition, the meanings of the numbers and symbols in Table 2 are similar to those in Table 1, and will not be repeated here.

[0086] Embodiment 3

[0087] This embodiment relates to a vehicle, on which is provided a power drive mechanism as in the first or second embodiment.

[0088] The vehicle of this embodiment, by applying a power drive mechanism such as that of embodiment one or embodiment two, has a compact overall structure. The power of the first power source and the second power source can be transmitted to the output shaft 2 separately, or can be transmitted to the output shaft 2 after being combined, or can be transmitted between the first power source and the second power source, so that the power drive mechanism can realize more driving modes, which is beneficial to improving the range of choices and driving comfort of the driver and passengers.

[0089] As a preferred embodiment, the vehicle is provided with a third motor, the power drive mechanism of embodiment one or embodiment two is transmission connected to one drive axle of the vehicle, the power output end of the third motor is transmission connected to another drive axle of the vehicle, and the drive axle mentioned here can also be any drive axle of the vehicle.

[0090] It should be noted here that the third motor can be a generator or an electric motor. Taking the vehicle as a four-wheel drive vehicle as an example, when the power drive mechanism of Example 1 or Example 2 is drivingly connected to the front drive axle, for example, when the output shaft 2 of the power drive mechanism is drivingly connected to the front differential of the front drive axle, the power output end of the third motor is drivingly connected to the rear drive axle of the vehicle. The transmission connection method can be a direct connection or a transmission connection to the rear drive axle through a power transmission component such as a gear system. The specific transmission connection method can refer to the structure in the prior art.

[0091] It should be understood that in other types of vehicles, the power output end of the third motor can also be connected to the front drive axle of the vehicle, while the power drive mechanism of the first or second embodiment is connected to the rear drive axle. It should also be noted that the third motor can also be a hub motor, and its installation method can refer to the prior art.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. 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 mechanism, characterized in that: comprising an input shaft, a planetary gear train and an output shaft (2); The input shaft comprises a first half shaft (101) and a second half shaft (102), the first half shaft (101) being used for transmission connection with a power output end of a first power source, and the second half shaft (102) being used for transmission connection with a power output end of a second power source; The sun gear (301) of the planetary gear train is arranged on the second half shaft (102), the planet carrier (304) of the planetary gear train is arranged on the first half shaft (101) and is transmission-connected to the first transmission unit, and the ring gear (303) of the planetary gear train is transmission-connected to the second transmission unit; The output shaft (2) is provided with a first synchronizer (4), and the first synchronizer (4) is selectively connected to the first transmission unit so that the planet carrier (304) and the output shaft (2) can be connected in transmission; the first synchronizer (4) is selectively connected to the second transmission unit so that the ring gear (303) and the output shaft (2) can be connected in transmission; The output shaft (2) can be used for transmission connection with a differential (6).

2. The power drive mechanism according to claim 1, characterized in that: The first transmission unit comprises a first driven gear (201) loosely sleeved on the output shaft (2), the planet carrier (304) is meshedly connected to the first driven gear (201), and the first synchronizer (4) can be selectively connected to the first driven gear (201).

3. The power drive mechanism according to claim 2, characterized in that: The second transmission unit comprises a second driving gear (1021) loosely sleeved on the second half shaft (102) and a second driven gear (202) loosely sleeved on the output shaft (2), the second driving gear (1021) and the second driven gear (202) being meshed and connected, and the ring gear (303) is connected to the second driving gear (1021); The input shaft is provided with a second synchronizer (5), and the second synchronizer (5) can be selectively connected to the second driving gear (1021); The first synchronizer (4) is capable of selectively connecting to the second driven gear (202).

4. The power drive mechanism according to claim 1, characterized in that: The first transmission unit comprises a first driven gear (201) loosely sleeved on the output shaft (2), the ring gear (303) is meshed and connected with the first driven gear (201), and the first synchronizer (4) can be selectively connected to the first driven gear (201).

5. The power drive mechanism according to claim 4, characterized in that: The second transmission unit comprises a second driving gear (1021) loosely sleeved on the second half shaft (102) and a second driven gear (202) loosely sleeved on the output shaft (2), the second driving gear (1021) and the second driven gear (202) being meshed and connected, and the planet carrier (304) is connected to the second driving gear (1021); The first synchronizer (4) is capable of selectively connecting to the second driven gear (202).

6. The power drive mechanism according to any one of claims 1 to 5, characterized in that: The first power source comprises an engine (11), and the second power source comprises a first motor (12); The engine (11) and the first motor (12) are disposed at two ends of the input shaft; and / or the engine (11) is directly connected to the first half shaft (101), and the first motor (12) is directly connected to the second half shaft (102).

7. The power drive mechanism according to claim 6, characterized in that: An output gear (203) is provided on the output shaft (2), and the output gear (203) is used for transmission connection with the differential (6). The output gear (203) is arranged on a side of the output shaft (2) close to the engine (11).

8. The power drive mechanism according to claim 6, characterized in that: It also comprises a second motor (13), wherein a power output shaft of the second motor (13) is drivingly connected to the output shaft (2).

9. The power drive mechanism according to claim 8, characterized in that: The power output shaft of the second motor (13) is transmission-connected to the output shaft (2) via a gear pair, and the gear pair is arranged on a side of the output shaft (2) away from the engine (11); The gear pair comprises a third driving gear (1301) arranged on the power output shaft of the second motor (13), and a third driven gear (204) arranged on the output shaft (2), and the third driving gear (1301) and the third driven gear (204) are meshed and connected.

10. A vehicle, characterized in that: The vehicle is provided with a power drive mechanism and a third motor as described in any one of claims 1 to 9, the power drive mechanism is drivingly connected to one drive axle of the vehicle, and the power output end of the third motor is drivingly connected to the other drive axle of the vehicle.

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