Power transmission device and vehicle

Abstract

The utility model provides a power transmission device and a vehicle, according to the power transmission device, an input shaft comprises a first half shaft and a second half shaft, a planetary gear train comprises a planet carrier arranged on the first half shaft, a sun gear arranged on the second half shaft and a gear ring connected with a hollow shaft on the second half shaft, the planet gear is in transmission connection between the sun gear and the gear ring, a first force transmission assembly is arranged between the gear ring and the output shaft, a second force transmission assembly is arranged between the hollow shaft and the output shaft, the output shaft is provided with a first synchronizer connected with the first force transmission assembly or the second force transmission assembly, and the output shaft is used for being in transmission connection with a differential mechanism. According to the power transmission device, the hollow shaft is arranged on the second half shaft, power on the first half shaft can be transmitted to the output shaft through the gear ring of the planetary gear train or transmitted to the hollow shaft and then transmitted to the output shaft through the gear ring, the overall structure is compact, arrangement is convenient, the transmission ratio can be well changed, and multiple driving modes can be achieved.

Description

Technical Field

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

[0002] Vehicles are classified according to their power sources, mainly including motor vehicles and non-motor vehicles. Motor vehicles are usually driven by power devices such as engines and electric motors, while non-motor vehicles are mainly driven by human or animal power. Compared with non-motor vehicles, motor vehicles can save manpower better and achieve faster speeds, and are gradually developing towards replacing non-motor vehicles.

[0003] The power system of a motor vehicle refers to a series of components and systems required to drive the vehicle. It is responsible for converting energy into mechanical energy to drive the wheels to rotate, so that the vehicle can move forward, backward, accelerate and decelerate. The power system mainly includes a power source and a power transmission device. The power source is used to provide power, and the power transmission device transmits the power provided by the power source to the vehicle's drive shaft to drive the vehicle.

[0004] Existing power transmission devices such as transmissions are gear transmission devices that can fix or change the transmission ratio of the output shaft and the input shaft in stages. They mainly have the following functions: changing the transmission ratio, expanding the range of variation of the drive wheel torque and speed to adapt to frequently changing driving conditions, allowing the car to travel backward without changing the direction of engine rotation, and utilizing neutral gear to interrupt power transmission so that the engine can start and idle, and facilitate transmission shifting or power output.

[0005] A planetary gear train refers to a combination of several gear pairs with at least one planetary gear transmission mechanism, which can not only rotate around its own axis (rotate), but also rotate (revolve) around the axis of other gears (such as the sun gear or ring gear) along with the planet carrier. This operating principle is similar to the movement of planets in the solar system.

[0006] In existing transmissions that use planetary gear trains, power is generally output from one of the planetary carrier and the ring gear. The planetary gear train can make the structure of the power transmission device of the transmission more compact and achieve a larger transmission ratio in a limited space, thereby meeting the requirements of the automobile transmission system for high speed ratio and low speed ratio.

[0007] However, with the progress and development of vehicles, people have higher and higher requirements on the compactness of the transmission structure, the vehicle's power, smooth shifting and other performance. The structure of the existing transmissions that use planetary gear trains and those that do not use planetary gear trains can still be further optimized to better meet people's demands for the performance of power transmission devices. Utility Model Content

[0008] In view of this, the utility model aims to provide a power transmission device so as to make the overall structure compact and facilitate the realization of more driving modes.

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

[0010] A power transmission device comprises an input shaft, a planetary gear train, a first force transmission assembly, a second force transmission assembly and an output shaft;

[0011] The input shaft comprises a first half shaft and a second half shaft, and a hollow shaft is sleeved on the second half shaft;

[0012] The planetary gear train includes a planet carrier disposed on the first semi-shaft, a sun gear disposed on the second semi-shaft, a ring gear connected to the hollow shaft, and a plurality of planet gears drivingly connected between the sun gear and the ring gear;

[0013] A first force transmission assembly is provided between the ring gear and the output shaft, a second force transmission assembly is provided between the hollow shaft and the output shaft, a first synchronizer is provided on the output shaft, the first synchronizer is provided between the first force transmission assembly and the second force transmission assembly, the first synchronizer can selectively connect to the first force transmission assembly, and the first synchronizer can selectively connect to the second force transmission assembly;

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

[0015] Furthermore, the first force transmission assembly includes a first engaging ring gear fixedly mounted on the ring gear, and a first driven gear loosely sleeved on the output shaft, wherein the first engaging ring gear is meshedly connected with the first driven gear;

[0016] The second force transmission assembly comprises a second driving gear fixed on the hollow shaft, and a second driven gear loosely sleeved on the output shaft, the second driving gear is meshed and connected with the second driven gear;

[0017] The first synchronizer selectively connects the first driven gear and the second driven gear.

[0018] Furthermore, a second engaging ring gear is disposed on the second driving gear or the hollow shaft, and a second synchronizer is disposed on the second half shaft, and the second synchronizer is used for selectively connecting to the second engaging ring gear.

[0019] Furthermore, the transmission ratio of the first force transmission assembly is different from the transmission ratio of the second force transmission assembly.

[0020] Further, the first semi-shaft and the second semi-shaft are coaxially arranged; and / or,

[0021] The axial center line of the second semi-shaft and the axial center line of the hollow shaft are arranged to coincide with each other.

[0022] Furthermore, the power transmission device further comprises an engine, and a power output end of the engine is drivingly connected to the first half-shaft;

[0023] The power transmission device further comprises a first motor, a power output end of which is drivingly connected to the hollow shaft or the second half-shaft.

[0024] Furthermore, the power transmission device also includes a second motor;

[0025] The power output shaft of the second motor is drivingly connected to the output shaft, and the second motor and the differential are disposed on both sides of the output shaft.

[0026] Furthermore, the power transmission device also includes a second motor;

[0027] The power output shaft of the second motor is drivingly connected to the differential, and the second motor is located on a side of the differential facing away from the engine.

[0028] Furthermore, the output shaft is provided with an output gear, and the output gear is used to mesh with the input gear of the differential;

[0029] The output gear is disposed on the output shaft at a position close to the differential.

[0030] Compared with the prior art, the utility model has the following advantages:

[0031] The power transmission device described in the utility model has a hollow shaft arranged on the second half shaft, and the power on the first half shaft can be transmitted to the output shaft through the ring gear of the planetary gear system, or first transmitted to the hollow shaft through the ring gear and then to the output shaft. The overall structure is compact and easy to arrange, the transmission ratio can be changed well, and more driving modes can be realized.

[0032] In addition, the first engaging ring gear is arranged on the ring gear of the planetary gear system, so that the overall structure is compact and light in weight. The second power transmission component includes the second driving gear and the second driven gear, which is a more commonly used power transmission structure. Its structure is simple and easy to arrange. The second engaging ring gear and the second synchronizer are arranged on the second driving gear or the hollow shaft. Limited space can be used to achieve more driving modes, and the overall weight is light. The power of the first half shaft can be transmitted to the output shaft alone, the power of the second half shaft can be transmitted to the output shaft alone, or the power of the first half shaft and the second half shaft can be transmitted to each other, or the power of the first half shaft and the second half shaft can be combined and then transmitted to the output shaft, which has good practicality.

[0033] In addition, the transmission ratio of the first force transmission assembly is different from that of the second force transmission assembly, and there are more gear modes. When the gears are switched, the gear shifting is smoother. The first half shaft and the second half shaft are arranged coaxially, so that the overall structure of the power transmission device is more compact, and the axial center line of the second half shaft and the axial center line of the hollow shaft are arranged to coincide, so the structure is compact and the overall layout is convenient.

[0034] As for the engine, it is conducive to realizing the engine driving mode, and the first motor can cooperate with the engine to realize the engine and the first motor co-driving mode, the first motor single driving mode, and the engine driving the first motor to generate electricity. The first motor can also be used as the engine starter motor. The second motor can output power to drive the vehicle when the power of the engine and the first motor is not transmitted to the output shaft. The second motor can also cooperate with the engine and the first motor to realize more driving modes.

[0035] The output gear provided can ensure that the power transmitted to the output shaft in each gear can be transmitted to the differential through the output gear. The overall structure is compact and convenient for overall layout.

[0036] Another object of the utility model is to provide a vehicle, which is provided with the power transmission device and the third motor as described above, the power transmission device 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.

[0037] The vehicle described in the utility model, by applying the above power transmission device, has a compact overall structure, can achieve more transmission ratios, and can achieve more driving modes, which is conducive to changing the transmission ratio and providing a suitable output speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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:

[0039] Figure 1 It is a structural schematic diagram of the power transmission device described in Example 1 of the utility model.

[0040] Description of reference numerals:

[0041] 1. Engine; 2. First motor; 3. Second motor; 301. Third driving gear; 401. First half shaft; 402. Second half shaft; 5. First synchronizer; 6. Second synchronizer; 7. Differential; 8. Hollow shaft; 801. Second driving gear; 8011. Second engaging ring gear; 9. Output shaft; 901. First driven gear; 902. Second driven gear; 903. Output gear; 904. Third driven gear; 1001. Sun gear; 1002. Planetary gear; 1003. Ring gear; 10031. First engaging ring gear; 1004. Planet carrier. DETAILED DESCRIPTION

[0042] 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.

[0043] In the description of the present invention, the orientation or position relationship shown in the 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 operate 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.

[0044] In addition, in the embodiments of the present invention, 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 indirectly connected 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.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0046] Embodiment 1

[0047] The present embodiment relates to a power transmission device, which improves its own structure and applies a planetary gear system, so that the overall structure is compact, the weight is light, the cost is low, and more driving modes can be realized, thereby having good practicality.

[0048] Based on the above design concept, an exemplary structure of the power transmission device of this embodiment is as follows: Figure 1As shown, in terms of overall structure, the power transmission device of this embodiment mainly includes an input shaft, a planetary gear system, a first force transmission assembly, a second force transmission assembly and an output shaft 9. The power transmission device mainly improves the layout of the components on the input shaft and the output shaft 9, so that more driving modes can be achieved on the basis of a compact structure.

[0049] Based on the above overall structural description and in order to better understand the power transmission device of this embodiment, the structure of the planetary gear system is first described here. The planetary gear system of this embodiment can adopt any existing planetary gear system structure, such as a multi-stage planetary gear system or a multi-row planetary gear system. In this embodiment, the planetary gear system is a single-stage and single-row planetary gear system as an example for description.

[0050] The planetary gear system of this embodiment mainly includes a sun gear 1001, multiple planetary gears 1002, a planet carrier 1004 and a ring gear 1003, wherein the multiple planetary gears 1002 are arranged circumferentially of the sun gear 1001, the sun gear 1001 is respectively meshed and connected with each planetary gear 1002, and the ring gear 1003 is sleeved outside the multiple planetary gears 1002, and the ring gear 1003 is respectively meshed and connected with each planetary gear 1002, and the planet carrier 1004 is a mounting frame for each planetary gear 1002.

[0051] In this embodiment, the input shaft includes a first half shaft 401 and a second half shaft 402, a hollow shaft 8 is sleeved on the second half shaft 402, the aforementioned planet carrier 1004 is fixed on the first half shaft 401, the sun gear 1001 is fixed on the second half shaft 402, the ring gear 1003 is connected to the hollow shaft 8, and multiple planetary gears 1002 are transmission-connected between the sun gear 1001 and the ring gear 1003.

[0052] A first force transmission assembly is provided between the ring gear 1003 and the output shaft 9, a second force transmission assembly is provided between the hollow shaft 8 and the output shaft 9, a first synchronizer 5 is provided on the output shaft 9, and the first synchronizer 5 is provided between the first force transmission assembly and the second force transmission assembly. The first synchronizer 5 can selectively connect to the first force transmission assembly, so that the power on the ring gear 1003 can be transmitted to the output shaft 9 through the first force transmission assembly and the first synchronizer 5. The first synchronizer 5 can also selectively connect to the second force transmission assembly, so that the power on the ring gear 1003 can be transmitted to the output shaft 9 through the hollow shaft 8, the second force transmission assembly and the first synchronizer 5. The output shaft 9 is used for transmission connection with the differential 7, so that the power transmitted to the output shaft 9 can be transmitted to the differential 7, thereby facilitating driving the vehicle.

[0053] As a preferred embodiment, the first force transmission component includes a first engaging ring gear 10031 fixed on the ring gear 1003, and a first driven gear 901 loosely mounted on the output shaft 9, and the first engaging ring gear 10031 is meshed and connected with the first driven gear 901; the second force transmission component includes a second driving gear 801 fixed on the hollow shaft 8, and a second driven gear 902 loosely mounted on the output shaft 9, and the second driving gear 801 is meshed and connected with the second driven gear 902.

[0054] The first synchronizer 5 is selectively connected to the first driven gear 901, so that the power on the first half shaft 401 can be transmitted to the output shaft 9 through the ring gear 1003, the first engaging ring gear 10031 and the first driven gear 901. The first synchronizer 5 is selectively connected to the second driven gear 902, so that the power on the first half shaft 401 can be transmitted to the output shaft 9 through the ring gear 1003, the hollow shaft 8, the second driving gear 801, the second driven gear 902 and the first synchronizer 5.

[0055] In the above structure, the first force transmission assembly and the second force transmission assembly are simple in structure, and are connected to the first driven gear 901 or the second driven gear 902 through the first synchronizer 5. More gear modes can be achieved by utilizing limited space, and the overall weight is light.

[0056] In addition, in addition to the first engaging ring gear 10031 fixed on the ring gear 1003, the first force transmission component can also be a first driving gear. In this case, the first driving gear can be fixed on the hollow shaft 8, so that the first driving gear is connected to the ring gear 1003 through the hollow shaft 8.

[0057] It should be noted that when the first force transmission component is the first driving gear, it can also be loosely sleeved on the hollow shaft 8. In this case, the second driving gear 801 can also be loosely sleeved on the hollow shaft 8. A synchronizer located on the hollow shaft 8 is arranged between the first driving gear and the second driving gear 801. The synchronizer selectively connects the first driving gear, and the synchronizer can also selectively connect the second driving gear 801. If the first driven gear 901 and the second driven gear 902 are loosely sleeved on the output shaft 9, the first synchronizer 5 mentioned above in this embodiment needs to be arranged. The first driven gear 901 and the second driven gear 902 can also be fixed on the output shaft 9, and in this case, the first synchronizer 5 does not need to be arranged on the output shaft 9.

[0058] As a preferred embodiment, the second driving gear 801 is provided with a second engagement ring gear 8011, which is specifically located on the side of the second driving gear 801 facing away from the first half shaft 401, and the second half shaft 402 is provided with a second synchronizer 6, which is used to selectively connect the second engagement ring gear 8011, so that the power on the second half shaft 402 can be transmitted to the hollow shaft 8 through the second synchronizer 6, the second engagement ring gear 8011, and the second driving gear 801, so that the power can be transmitted between the hollow shaft 8 and the second half shaft 8, or the power transmission can be disconnected, so as to facilitate the realization of more gear modes. It should be noted that the second engagement ring gear 8011 can be provided on the hollow shaft 8 in addition to being provided on the second driving gear 801.

[0059] As a preferred embodiment, the transmission ratio of the first force transmission assembly is different from the transmission ratio of the second force transmission assembly. For example, in this embodiment, the diameter of the first engagement gear ring 10031 is smaller than the diameter of the second driving gear 801, so that the first power transmission assembly is used to achieve the first gear, and the second power transmission assembly is used to achieve the second gear. Here, the transmission ratios of the gear trains of each gear are different, there are more gear modes, and the gear shifting smoothness is better when the gear is switched.

[0060] As a preferred implementation, the first semi-axle 401 and the second semi-axle 402 are coaxially arranged, so that the overall structure is compact and the overall arrangement is convenient.

[0061] As a preferred embodiment, the axial center line of the second semi-shaft 402 and the axial center line of the hollow shaft 8 are arranged to coincide with each other, which also has the beneficial effects of compact structure and convenient overall arrangement.

[0062] As a preferred embodiment, the power transmission device of this embodiment further includes an engine 1, and the power output end of the engine 1 is transmission-connected to the first semi-shaft 401, so that the power of the engine 1 can be transmitted to the first semi-shaft 401. In a preferred embodiment, the power output end of the engine 1 is directly connected to the first semi-shaft 401, so that the overall structure is simple and the weight is light.

[0063] It should be understood that in other embodiments, a clutch may be provided between the engine 1 and the first half-shaft 401, or a flywheel may be provided at the power output end of the engine 1, such as on the crankshaft of the engine 1, or the connection between the engine 1 and the first half-shaft 401 may refer to other existing connection methods between the engine 1 and the input shaft of the transmission.

[0064] As a preferred implementation, the power transmission device of this embodiment further includes a first motor 2, and the power output end of the first motor 2 is transmission-connected to the hollow shaft 8 or the second half shaft 402. Preferably, the power output end of the first motor 2 is directly connected to the second half shaft 402, which has a good compact structure, weight reduction, and production cost reduction effect.

[0065] It should be understood that a gear pair may also be provided between the power output end of the first motor 2 and the second half shaft 402, or the power output end of the first motor 2 may be directly connected to the hollow shaft 8, or the power output end of the first motor 2 may be transmission-connected to the hollow shaft 8. For example, a driving wheel meshingly connected to the second driving gear 801 on the hollow shaft 8 may be provided on the power output end of the first motor 2, or a driving wheel meshingly connected to the first engaging gear ring 10031 may be provided on the power output end of the first motor 2.

[0066] In the above structure, the engine 1 is provided to facilitate the realization of the engine 1 driving mode, and the first motor 2 is provided to cooperate with the engine 1 to realize the engine 1 and the first motor 2 common driving mode, the first motor 2 independent driving mode, and the engine 1 drives the first motor 2 to generate electricity. The first motor 2 can also be used as a starting motor for the engine 1.

[0067] As a preferred implementation, the power transmission device of this embodiment also includes a second motor 3, and the power output shaft of the second motor 3 is transmission-connected with the output shaft 9. Here, the second motor 3 is configured to output power to drive the vehicle when the power of the engine 1 and the first motor 2 is not transmitted to the output shaft 9. The second motor 3 can also cooperate with the engine 1 and the first motor 2 to realize more driving modes.

[0068] In this example, in a preferred implementation manner, the second motor 3 and the differential 7 are disposed on both sides of the output shaft 9 to facilitate the overall layout.

[0069] As a preferred embodiment, the power output shaft of the second motor 3 is transmission-connected to the output shaft 9 through a gear pair. In this embodiment, the gear pair includes a third driving gear 301 fixedly mounted on the power output end of the second motor 3, and a third driven gear 904 fixedly mounted on the output shaft 9. The third driving gear 301 and the third driven gear 904 are meshed and connected, so that the power of the second motor 3 can be transmitted to the output shaft 9 through the third driving gear 301 and the third driven gear 904, and then can be transmitted to the differential 7. The overall structure is simple, the weight is light, and the cost is low.

[0070] It should be noted here that it is also possible for the third driving gear 301 to be loosely mounted on the power output end of the second motor 3. In this case, a synchronizer selectively connected to the third driving gear 301 should be provided on the power output end of the second motor 3. In addition, it is also possible for the third driven gear 904 to be loosely mounted on the output shaft 9. In this case, a synchronizer selectively connected to the third driven gear 904 should be provided on the output shaft 9.

[0071] It should be noted here that, in addition to being transmission-connected to the output shaft 9, the power output end of the second motor 3 can also be transmission-connected to the differential 7. Specifically, the second motor 3 is located on the side of the differential 7 facing away from the engine 1, and the input gears of the second motor 3 and the differential 7 can be provided with a force transmission component such as the aforementioned gear pair as needed.

[0072] As a preferred embodiment, an output gear 903 is provided on the output shaft 9, and the output gear 903 is used to mesh with the input gear of the differential 7. The output gear 903 provided here can make the power transmitted to the output shaft 9 in each gear position be transmitted to the differential 7 through the output gear 903, and the overall structure is compact and convenient for overall layout. In the preferred embodiment, the output gear 903 is arranged at a position of the output shaft 9 close to the differential 7, which occupies a reasonable space and is convenient for overall layout.

[0073] like Figure 1 The achievable driving modes of the power transmission device shown are shown in Table 1.

[0074] Table 1:

[0075] model First synchronizer Second synchronizer engine First Motor Second motor Pure Electric middle middle × × √ Series Connection middle Left √ √ √ 1st gear Left Left √ ○ ○ Diversion 1 Left middle √ √ ○ Diversion 2 right middle √ √ ○ 2nd gear right Left √ ○ ○

[0076] It should be noted here that the first column is the driving modes that can be achieved by the power transmission device, which from top to bottom are pure electric mode, series mode, 1st gear mode, first shunt mode, second shunt mode and 2nd gear mode.

[0077] The second column represents Figure 1 In the state shown, the connection position of the first synchronizer 5, "middle" represents that the first synchronizer 5 is neither connected to the first driven gear 901 nor to the second driven gear 902, "left" represents that the first synchronizer 5 is connected to the first driven gear 901, "right" represents that the first synchronizer 5 is connected to the second driven gear 902, and the third column represents Figure 1 In the connection position of the second synchronizer 6 in the state shown, “middle” represents that the second synchronizer 6 is not connected to the second engagement ring gear 8011 , and “left” represents that the second synchronizer 6 is connected to the second engagement ring gear 8011 .

[0078] 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.

[0079] In the power transmission device of this embodiment, a hollow shaft 8 is arranged on the second half shaft 402. The power on the first half shaft 401 can be transmitted to the output shaft 9 through the ring gear 1003 of the planetary gear system, or first transmitted to the hollow shaft 8 through the ring gear 1003 and then to the output shaft 9. The overall structure is compact and easy to arrange, the transmission ratio can be changed well, and more driving modes can be realized.

[0080] Embodiment 2

[0081] This embodiment relates to a vehicle, on which is provided a power transmission device as in the first embodiment.

[0082] The vehicle of this embodiment, by applying the power transmission device as in the first embodiment, has a compact overall structure, can achieve more transmission ratios, and can achieve more driving modes, which is conducive to changing the transmission ratio and providing a suitable output speed, making it more convenient for customers to choose.

[0083] As a preferred embodiment, the vehicle is provided with a third motor, the power transmission device of embodiment one is transmission connected to one drive axle of the vehicle, and the power output end of the third motor is transmission connected to another drive axle of the vehicle. The drive axle mentioned here can also be any drive axle of the vehicle.

[0084] 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 transmission device of Example 1 is drivingly connected to the front drive axle, for example, when the output shaft 302 of the power transmission device 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.

[0085] 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 transmission device of the first embodiment is connected to the rear drive axle. The above are only preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A power transmission device, characterized in that: It comprises an input shaft, a planetary gear train, a first force transmission assembly, a second force transmission assembly and an output shaft (9); The input shaft comprises a first half shaft (401) and a second half shaft (402), and a hollow shaft (8) is sleeved on the second half shaft (402); The planetary gear train comprises a planet carrier (1004) arranged on the first semi-shaft (401), a sun gear (1001) arranged on the second semi-shaft (402), a ring gear (1003) connected to the hollow shaft (8), and a plurality of planetary gears (1002) drivingly connected between the sun gear (1001) and the ring gear (1003); A first force transmission assembly is provided between the ring gear (1003) and the output shaft (9), a second force transmission assembly is provided between the hollow shaft (8) and the output shaft (9), a first synchronizer (5) is provided on the output shaft (9), the first synchronizer (5) is provided between the first force transmission assembly and the second force transmission assembly, the first synchronizer (5) can selectively connect to the first force transmission assembly, and the first synchronizer (5) can selectively connect to the second force transmission assembly; The output shaft (9) is used for driving connection with the differential (7).

2. The power transmission device according to claim 1, characterized in that: The first force transmission component comprises a first engaging ring gear (10031) fixedly mounted on the ring gear (1003), and a first driven gear (901) loosely sleeved on the output shaft (9), the first engaging ring gear (10031) being meshed and connected with the first driven gear (901); The second force transmission component comprises a second driving gear (801) fixedly mounted on the hollow shaft (8), and a second driven gear (902) loosely sleeved on the output shaft (9), the second driving gear (801) being meshed and connected with the second driven gear (902); The first synchronizer (5) selectively connects the first driven gear (901) and the second driven gear (902).

3. The power transmission device according to claim 2, characterized in that: The second driving gear (801) or the hollow shaft (8) is provided with a second engaging ring gear (8011), and the second half shaft (402) is provided with a second synchronizer (6), and the second synchronizer (6) is used for selectively connecting the second engaging ring gear (8011).

4. The power transmission device according to claim 1, characterized in that: The transmission ratio of the first force transmission assembly is different from the transmission ratio of the second force transmission assembly.

5. The power transmission device according to claim 1, characterized in that: The first semi-axle (401) and the second semi-axle (402) are coaxially arranged; and / or, The axial centerline of the second half shaft (402) and the axial centerline of the hollow shaft (8) are arranged to coincide with each other.

6. The power transmission device according to claim 1, characterized in that: The power transmission device further comprises an engine (1), wherein a power output end of the engine (1) is drivingly connected to the first half shaft (401); The power transmission device further comprises a first motor (2), wherein a power output end of the first motor (2) is drivingly connected to the hollow shaft (8) or the second half shaft (402).

7. The power transmission device according to claim 1 or 6, characterized in that: The power transmission device also includes a second motor (3); The power output shaft of the second motor (3) is drivingly connected to the output shaft (9), and the second motor (3) and the differential (7) are disposed on both sides of the output shaft (9).

8. The power transmission device according to claim 6, characterized in that: The power transmission device also includes a second motor (3); The power output shaft of the second motor (3) is drivingly connected to the differential (7), and the second motor (3) is located on a side of the differential (7) facing away from the engine (1).

9. The power transmission device according to claim 1, characterized in that: The output shaft (9) is provided with an output gear (903), and the output gear (903) is used to mesh with the input gear of the differential (7); The output gear (903) is arranged at a position of the output shaft (9) close to the differential (7).

10. A vehicle, characterized in that: The vehicle is provided with a power transmission device as described in any one of claims 1 to 9 and a third motor, the power transmission device 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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