Power transmission assembly and vehicle

Abstract

The utility model provides a power transmission assembly and a vehicle. The power transmission assembly comprises an input shaft and an output shaft which are arranged in parallel. A planetary gear train is arranged on the input shaft; the input shaft and the output shaft are connected through a power transmission unit, the power transmission unit comprises at least one set of gear pair, the gear pair comprises an outer gear and an inner gear, and the outer gear is located in the space surrounded by the inner gear and is connected with the inner gear in a meshed mode. According to the power transmission assembly, the internal gear and the external gear are arranged, and the external gear is located in the space surrounded by the internal gear, so that the distance between the input shaft and the output shaft can be effectively reduced, the space occupied by the power transmission assembly in the radial direction of the input shaft is reduced, and the power transmission assembly can be conveniently arranged on a vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power systems, and particularly relates to a power transmission component. The utility model also relates to a vehicle provided with the above power transmission component. Background Art

[0002] The power drive system on a vehicle is used to provide power for the vehicle, and mainly consists of two major parts: a power source and a power transmission component (i.e., a transmission system). Among them, the power source can be, for example, an engine and / or an electric motor. When the power source is an engine, the vehicle is a fuel vehicle; when the power source is an engine and an electric motor, the vehicle is a hybrid vehicle; and when the power source is an electric motor, the vehicle is an electric vehicle.

[0003] The transmission is one of the most important components in the automotive driveline. Its main function is to change the transmission ratio, expand the variation range of the driving wheel torque and speed, so as to meet the traction requirements under different driving conditions, enable the engine to work under favorable conditions as much as possible, and meet the needs of the vehicle for forward driving, reverse driving, parking, and special conditions (such as towing or driving on a slope).

[0004] In the existing transmission structures, different gear pairs are used to achieve different gears, and there is also a planetary gear train integrated in the transmission. Because the planetary gear train has high transmission efficiency, the meshing points of the planetary gears are distributed on the entire gear, and it can withstand greater torque, thereby reducing transmission losses, which helps to improve the power performance and fuel economy of the vehicle. However, the existing transmissions equipped with a planetary gear train occupy a large space, are not convenient to be arranged on the vehicle, and there is still room for optimization in their structures. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to propose a power transmission component, which can reduce the distance between the input shaft and the output shaft and is convenient for arrangement on the whole vehicle.

[0006] To achieve the above object, the technical solution of the present utility model is realized as follows:

[0007] A power transmission component includes an input shaft and an output shaft arranged in parallel;

[0008] A planetary gear train is provided on the input shaft;

[0009] The input shaft and the output shaft are connected by a power transmission unit. The power transmission unit includes at least one set of gear pairs. Each gear pair includes an external gear and an internal gear. The external gear is located in the space surrounded by the internal gear and is meshed and connected with the internal gear.

[0010] Furthermore, the input shaft includes a first half-shaft and a second half-shaft, the sun gear of the planetary gear train is loosely mounted on the first half-shaft, the planetary carrier of the planetary gear train is connected to the first half-shaft, and the ring gear of the planetary gear train is connected to the second half-shaft; the power transmission unit is connected between the second half-shaft and the output shaft.

[0011] Furthermore, a hollow shaft is sleeved on the first half-shaft, and the sun gear is connected to one end of the hollow shaft; a synchronous meshing gear is provided on the first half-shaft, and a braking meshing gear is provided on the housing of the power transmission component, and the braking meshing gear is loosely sleeved on the hollow shaft, and a synchronizer is provided on the end of the hollow shaft away from the sun gear, and the synchronizer can be selectively connected to the synchronous meshing gear, and the synchronizer can be selectively connected to the braking meshing gear.

[0012] Furthermore, the power transmission unit includes a first intermediate shaft and a second intermediate shaft; the first intermediate shaft is connected to the second half shaft, the first intermediate shaft is coaxially arranged with the second half shaft, the first intermediate shaft and the second intermediate shaft are transmission connected through the gear pair, and the second intermediate shaft is transmission connected to the output shaft.

[0013] Further, a first clutch is provided between the first intermediate shaft and the second half shaft, and the first clutch is used to control power on and off between the first intermediate shaft and the second half shaft; and / or,

[0014] The second intermediate shaft is provided with a driving gear, the output shaft is provided with a driven gear, and the driving gear and the driven gear are meshed and connected.

[0015] Furthermore, it includes a first motor, the power output end of the first motor is a rotor with a accommodating space formed inside; the power output end of the first motor is drivingly connected to the sun gear; the planetary gear system is located in the accommodating space of the rotor, and the sun gear in the planetary gear system is drivingly connected to the rotor.

[0016] Furthermore, it also includes an engine; the power output end of the engine is directly connected to the first half shaft; and / or a second clutch is provided between the power output end of the engine and the first half shaft.

[0017] Furthermore, it also includes a second motor, and a power output end of the second motor is connected to the output shaft.

[0018] Furthermore, a transmission gear is provided on the outer peripheral wall of the inner gear, and a motor gear is provided at the power output end of the second motor, and the motor gear is meshed and connected with the transmission gear.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] In the power transmission assembly of the utility model, since a planetary gear train is provided on the input shaft or the output shaft, the space occupied in the radial direction of the input shaft is relatively large. Therefore, an internal gear and an external gear are provided in the power transmission assembly, and the external gear is located in the space surrounded by the internal gear, which can effectively reduce the distance between the input shaft and the output shaft, so that the space occupied by the power transmission assembly in the radial direction of the input shaft is reduced, facilitating the arrangement of the power transmission assembly on the vehicle.

[0021] In addition, the input shaft is made to include a first half shaft and a second half shaft, which is convenient for the arrangement of the planetary gear train. The power on the planetary gear train is transmitted from the second half shaft to the output shaft through the power transmission unit, making the overall arrangement more convenient. A hollow shaft is provided on the first half shaft, and a synchronizer, a synchronously meshing gear and a braking meshing gear are provided. The synchronizer can selectively connect the synchronously meshing gear to make the sun gear and the planet carrier reach the same speed. The synchronizer can also be connected to the braking meshing gear to brake the sun gear and make the speed of the sun gear zero. When the power is transmitted from the first half shaft to the second half shaft through the planetary gear train, two gears can be realized, which is beneficial to increasing the gear modes of the power transmission assembly and facilitating gear shifting.

[0022] Secondly, the power transmission unit includes a first intermediate shaft and a second intermediate shaft. Among them, the first intermediate shaft and the second half shaft are coaxially arranged, which can better save the space occupied by the power transmission assembly in the radial direction. The second intermediate shaft is in transmission connection with the output shaft, which is convenient for providing a suitable speed ratio for the output shaft and helps to improve the power transmission efficiency. A first clutch is provided between the second half shaft and the first intermediate shaft, which is convenient for controlling the on-off of the power between the second half shaft and the first intermediate shaft. The two can rotate synchronously or separately, which is beneficial to realizing more driving modes. A driving gear is provided on the second intermediate shaft, and a driven gear is provided on the output shaft, and the structure is simple.

[0023] Furthermore, a first motor is provided, and the power output end of the first motor is in transmission connection with the sun gear, so that the power of the first motor can be transmitted to the second half shaft through the sun gear. A receiving space is provided in the rotor, and the planetary gear train is located in the receiving space of the rotor, so that the space occupied by the power transmission assembly in the axial direction is also relatively small, further improving the convenience of arrangement on the vehicle.

[0024] Secondly, the first half shaft is directly connected to the power output end of the engine, so that the power of the engine can be directly transmitted to the first half shaft. This structure without setting a second clutch has the beneficial effects of better reducing weight and cost. And a second clutch is provided between the first half shaft and the power output end of the engine, so that the power between the first half shaft and the power output end of the engine can be combined or disconnected as needed, which is convenient for controlling the vehicle speed.

[0025] The engine and the first motor are arranged at the same time, and combined with the first clutch arranged as mentioned above, when the first clutch is disconnected, the operation of the engine can be utilized to charge the first motor, which is beneficial to saving energy. The first motor can also be used as a starting motor for the engine, eliminating the need for a starting motor separately matched for the engine, saving costs. At the same time, the engine and the first motor can also output power together, so that the power transmission component has a hybrid drive mode.

[0026] In addition, the second motor can output power alone when the first clutch is disconnected, so that the power transmission assembly has a pure electric drive mode, and the second motor does not need to be dragged back during the process of charging the first motor by the engine and the process of starting the engine by the first motor, which is conducive to better energy saving. A transmission gear is arranged on the outer wall of the inner gear, and the motor gear of the second motor is meshed and connected with the transmission gear, which can also better save the space occupied in the radial direction of the input shaft, making the radial structure more compact. At the same time, the inner gear and the transmission gear are integrated into an integrated structure, which is also conducive to reducing production costs and overall weight.

[0027] Another object of the utility model is to provide a vehicle, which is provided with the power transmission assembly and the third motor as described above, the power output end of the power transmission assembly is drivingly connected to one drive axle of the vehicle, and the third motor is drivingly connected to the other drive axle of the vehicle.

[0028] The vehicle described in the utility model, by adopting the above-mentioned power transmission assembly, can reduce the space occupied by the power transmission assembly in the radial direction of the input shaft, making it easier to arrange the power transmission assembly on the vehicle, thereby making the entire vehicle structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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:

[0030] Figure 1 This is a schematic diagram of the first structure of the power transmission assembly according to an embodiment of the utility model;

[0031] Figure 2 This is a second structural schematic diagram of the power transmission assembly according to an embodiment of the utility model;

[0032] Description of reference numerals:

[0033] 1. Input shaft; 2. Output shaft; 3. First intermediate shaft; 4. Second intermediate shaft; 6. Synchronizer; 7. Brake meshing gear; 8. First clutch; 9. Second clutch;

[0034] 101, the first half shaft; 102, the second half shaft; 103, the hollow shaft; 1011, the synchronously meshing gear;

[0035] 201, the driven gear; 202, the output gear;

[0036] 501, the sun gear; 502, the planet carrier; 503, the ring gear; 504, the planet gear;

[0037] 301, the internal gear; 401, the external gear; 402, the driving gear;

[0038] 11, the engine; 12, the first motor; 13, the second motor; 14, the differential;

[0039] 1201, the rotor; 1301, the motor gear. Detailed implementation manners

[0040] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0041] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installed", "connected", "connected", "connecting member" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0043] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0044] Embodiment 1

[0045] This embodiment relates to a power transmission assembly, which can effectively reduce the distance between the input shaft and the output shaft, facilitating its layout on the vehicle.

[0046] In terms of the overall composition, as Figure 1As shown, the power transmission assembly includes an input shaft 1 and an output shaft 2 arranged in parallel. Among them, a planetary gear train is provided on the input shaft 1. And the input shaft 1 and the output shaft 2 are connected by a power transmission unit, and the power transmission unit includes at least one set of gear pairs. The gear pair includes an external gear 401 and an internal gear 301. The external gear 401 is located in the space surrounded by the internal gear 301 and is meshed and connected with the internal gear 301.

[0047] At this time, since the planetary gear train is arranged on the input shaft 1 or the output shaft 2, the space occupied by it in the radial direction of the input shaft 1 is relatively large. In this embodiment, by arranging the meshed internal gear 301 and external gear 401 between the input shaft 1 and the input shaft 2 and making the external gear 401 located in the space surrounded by the internal gear 301, the distance between the input shaft 1 and the output shaft 2 can be effectively reduced, so that the space occupied by the power transmission assembly in the radial direction of the input shaft 1 is reduced, which is convenient for arranging the power transmission assembly on the vehicle.

[0048] Based on the above overall structure, as a preferred embodiment, in this embodiment, continue to refer to Figure 1 As shown, the input shaft 1 includes a first half shaft 101 and a second half shaft 102 arranged coaxially. The sun gear 501 of the planetary gear train is sleeved on the first half shaft 101, the planet carrier 502 of the planetary gear train is connected to the first half shaft 101 together, and the ring gear 503 of the planetary gear train is connected to the second half shaft 102 together. The above-mentioned power transmission unit is then connected between the second half shaft 102 and the output shaft 2. In this structure, the input shaft includes the first half shaft 101 and the second half shaft 102, which is convenient for arranging the planetary gear train. The power on the planetary gear train is transmitted from the second half shaft 102 to the output shaft 2 through the power transmission unit, making the overall arrangement more convenient.

[0049] As a further preferred embodiment, in this embodiment, a hollow shaft 103 is sleeved on the first half shaft 101, and the sun gear 501 is specifically fixed to one end of the hollow shaft 103. And, a synchronizing engagement gear 1011 is fixed on the first half shaft 101. A braking engagement gear 7 is provided on the housing of the power transmission assembly. The braking engagement gear 7 is sleeved on the hollow shaft 103. A synchronizer 6 is provided at one end of the hollow shaft 103 away from the sun gear 501. The synchronizer 6 can selectively connect the synchronizing engagement gear 1011, and the synchronizer 6 can selectively connect the braking engagement gear 7.

[0050] By arranging a hollow shaft 103 on the first half shaft and arranging a synchronizer 6, a synchronously meshing gear 1011 and a braking meshing gear 7, the synchronizer 6 can selectively connect the synchronously meshing gear 1011, so that the sun gear 501 and the planet carrier 502 reach the same rotational speed. The synchronizer 6 can also be connected to the braking meshing gear 7 for braking the sun gear 501 to make the rotational speed of the sun gear 501 zero. At this time, when the power is transmitted from the first half shaft 101 to the second half shaft 102 through the planetary gear train, two gears can be realized, which is beneficial to increasing the gear modes of the power transmission component and facilitating gear shifting.

[0051] In the power transmission unit of this embodiment, as a preferred embodiment, the power transmission unit includes a first intermediate shaft 3 and a second intermediate shaft 4. Among them, the first intermediate shaft 3 is coaxially arranged with the second half shaft 102, and the first intermediate shaft 3 is connected to the second half shaft 102, and the second intermediate shaft 4 is in transmission connection with the output shaft 2. Moreover, the first intermediate shaft 3 and the second intermediate shaft 4 are in transmission connection through a gear pair.

[0052] During specific arrangement, the external gear 401 in the gear pair is fixedly connected to the first intermediate shaft 3, and the internal gear 301 in the gear pair is fixedly connected to the second intermediate shaft 4. At this time, the power from the second half shaft 102 is transmitted to the first intermediate shaft 3 and then transmitted to the second intermediate shaft 4 through the external gear 401 and the internal gear 301, and then transmitted from the second intermediate shaft 4 to the output shaft 2.

[0053] The power transmission unit of this embodiment adopts the first intermediate shaft 3 and the second intermediate shaft 4. Among them, the first intermediate shaft 3 and the second half shaft 102 are coaxially arranged, which can better save the space occupied by the power transmission component in the radial direction, and the second intermediate shaft 4 is in transmission connection with the output shaft 2, which is convenient to provide a suitable speed ratio for the output shaft 2 and helps to improve the power transmission efficiency.

[0054] As a further preferred embodiment, in this embodiment, a first clutch 8 is also arranged between the first intermediate shaft 3 and the second half shaft 102, and the first clutch 8 is used to control the on-off of the power between the first intermediate shaft 3 and the second half shaft 102. The setting of the first clutch 8 can conveniently control the on-off of the power between the second half shaft 102 and the first intermediate shaft 3, so that the two can rotate synchronously or separately, which is beneficial to realizing more driving modes.

[0055] It is worth noting that, in this embodiment, in addition to providing the first clutch 8 between the first intermediate shaft 3 and the second semi-shaft 102, the first intermediate shaft 3 and the second semi-shaft 102 can also be directly connected. In this case, the two shafts can share a shaft, or they can be processed separately and then connected together. When there is no first clutch 8, the various gears in the power transmission assembly, such as the internal gear 301, the external gear 401, the driving gear 402, the driven gear 201, etc., can be fixed on the corresponding shaft body or loosely sleeved on the corresponding shaft body. Taking the driven gear 201 loosely sleeved on the output shaft 2 as an example, a synchronizer should be provided on the output shaft 2 at this time, so that the synchronizer can selectively connect the driven gear to achieve the transmission of power between the shaft bodies.

[0056] As a further preferred embodiment, in this embodiment, a driving gear 402 is fixedly provided on the second intermediate shaft 4, and a driven gear 201 is fixedly provided on the output shaft 2, and the driving gear 402 and the driven gear 201 are meshed and connected. At this time, the power of the second intermediate shaft 4 can be transmitted to the output shaft 2 through the driving gear 402 and the driven gear 201, and the transmission stability can be ensured. Moreover, the driving gear arranged on the second intermediate shaft and the driven gear arranged on the output shaft are adopted, and the driving gear and the driven gear are meshed and connected, which also has the characteristics of simple structure and compact arrangement.

[0057] It is understandable that, in addition to the meshing transmission connection between the driving gear 402 and the driven gear 201, a gear pair structure such as an internal gear 301 and an external gear 401 may be arranged between the second intermediate shaft 4 and the output shaft 2 to achieve the transmission connection between the second intermediate shaft 4 and the output shaft 2. For example, the internal gear 301 may be fixed on one of the second intermediate shaft 4 and the output shaft 2, and the external gear 401 may be fixed on the other of the second intermediate shaft 4 and the output shaft 2, which is also feasible.

[0058] In addition, as a feasible implementation, the power transmission assembly of this embodiment further includes a first motor 12, wherein the power output end of the first motor 12 is a rotor 1201 having an accommodation space formed therein. The above-mentioned planetary gear system is located in the accommodation space of the rotor 1201, and the sun gear 501 in the planetary gear system is in transmission connection with the rotor 1201.

[0059] The first motor 12 is provided, and the power output end of the first motor 12 is provided in driving connection with the sun gear 501, so that the power of the first motor 12 can be transmitted to the second half shaft 102 through the sun gear 501. The planetary gear train is arranged in the accommodation space in the rotor, which can help reduce the space occupied by the power transmission component in the axial direction, and further improve the convenience of its arrangement on the vehicle.

[0060] In addition, the power transmission component of this embodiment further includes an engine 11. This engine preferably uses an engine with a longitudinally arranged output shaft. Of course, according to actual needs, an engine with a transversely arranged output shaft can also be used. As a feasible implementation method, the power output end of the engine 11 is directly connected to the first half shaft 101, as Figure 1 shown. With such a setting, the power of the engine 11 can be directly transmitted to the first half shaft 101. In such a structure without a second clutch 9, it has a good effect of reducing weight and cost.

[0061] Of course, as another feasible implementation method, a second clutch 9 can also be provided between the power output end of the engine 11 and the first half shaft 101, as Figure 2 shown. At this time, the setting of the second clutch 9 enables the power between the first half shaft 101 and the power output end of the engine 11 to be combined or disconnected as needed, which is convenient for controlling the vehicle speed.

[0062] It is worth mentioning that in this embodiment, by simultaneously setting the engine 11 and the first motor 12, and combining the first clutch 8 set as described above, when the first clutch 8 is disconnected, the work of the engine 11 can be used to charge the first motor 12, which is beneficial to saving energy. Moreover, the first motor 12 can also be used as the starting motor of the engine 11, saving the cost of separately matching a starting motor for the engine 11. At the same time, the engine 11 and the first motor 12 can also jointly output power, so that the power transmission component has a hybrid drive mode.

[0063] In this embodiment, an output gear 202 is also fixedly provided on the output shaft 2. The output gear 202 is specifically arranged at one end of the output shaft 2 close to the engine 11, and the output gear 202 is meshed and connected with the input gear ring of the differential 14. At this time, the differential 14 and the engine 11 are arranged on the same side, which is beneficial to saving the axial occupied space of the input shaft 1 and the output shaft 2.

[0064] In addition, the power transmission component of this embodiment further includes a second motor 13. The power output end of the second motor 13 is connected to the output shaft 2. By using the provided second motor, when the first clutch 9 is disconnected, the second motor 13 can output power alone, so that the power transmission component has a pure electric drive mode. Moreover, during the process of the engine 11 charging the first motor 12 and during the process of the first motor 12 starting the engine, there is no need to drag the second motor 13 in reverse, which is beneficial to better saving energy.

[0065] As a feasible implementation, in this embodiment, the power output end of the second motor 13 is transmission-connected with the first intermediate shaft 3, so that the power of the second motor 13 can be transmitted to the output shaft 2 through the transmission-connected first intermediate shaft 3 and the second intermediate shaft 4. Specifically, the power of the second motor 13 is first transmitted to the first intermediate shaft 3, then transmitted to the second intermediate shaft 4 through the internal gear 301 and the external gear 401, and then transmitted to the output shaft 2 through the second intermediate shaft 4.

[0066] Still viewing Figure 1 As shown, in this embodiment, as a preferred implementation, a transmission gear is provided on the outer peripheral wall of the inner gear 301, and a motor gear 1301 is provided at the power output end of the second motor 13, and the motor gear 1301 is meshed and connected with the transmission gear. At this time, the transmission gear is provided on the outer wall of the inner gear 301, and the motor gear 1301 of the second motor 13 is meshed and connected with the transmission gear, which can also better save the occupied space in the radial direction of the input shaft 1, making the radial structure more compact. At the same time, the inner gear 301 and the transmission gear are integrated into an integrated structure, which is also conducive to reducing the production cost and overall weight.

[0067] In a preferred embodiment, the transmission gear meshing with the motor gear 1301 can also be idling on the corresponding shaft. In this way, by disconnecting the power between the gear meshing with the motor gear 1301 and the corresponding shaft, the engine 11 and the first motor 12 can avoid reverse dragging of the second motor 13 when working, which is beneficial to saving energy. As in this embodiment, the internal gear 301 can be idling on the second intermediate shaft 4.

[0068] It is worth mentioning that, in this embodiment, in addition to connecting the power output end of the second motor 13 to the first intermediate shaft 3, it can also adopt the following structural form. As another feasible implementation, the power output end of the second motor 13 can also be connected to the output shaft 2, so that the power of the second motor 13 is directly transmitted to the output shaft 2. In specific implementation, for example, the motor gear 1301 on the power output shaft of the second motor 13 can be meshed and connected with the driven gear 201 on the output shaft 2. This arrangement can also realize the pure electric drive mode of the power transmission component, and can also be used in the process of charging the first motor at the engine position, and in the process of starting the engine by the first motor, without the need to reverse the second motor, which is conducive to better energy saving.

[0069] Of course, in addition to the above-mentioned structural form, the power output end of the second motor can also be connected to the second intermediate shaft. In this case, the power of the second motor is first transmitted to the second intermediate shaft, and then transmitted to the output shaft through the driving gear and the driven gear. In terms of specific structural arrangement, for example, the output shaft of the second motor can be shared with the second intermediate shaft.

[0070] likeFigure 1 The power drive mechanism shown can achieve the drive modes as shown in Table 1.

[0071] Table 1:

[0072]

[0073]

[0074] It should be noted here that the first column in Table 1 is the drive modes that the power transmission component can achieve, which are, from top to bottom, the pure electric mode, the series mode, the power split mode, the first direct drive mode, and the second direct drive mode.

[0075] In the second to fourth columns of Table 1, "√" represents that the corresponding power source is in the starting state, "×" represents that the corresponding power source is in the off state, and "○" represents that the corresponding power source can be either in the starting state or the off state.

[0076] The fifth column in Table 1 represents Figure 1 the engagement or disengagement state of the first clutch 8 in the shown state. The sixth column represents Figure 1 the connection position of the synchronizer 6 in the shown state. "Middle" means that the synchronizer 6 is neither connected to the synchronizer meshing gear 11 nor connected to the brake meshing gear 7. "Left" means that the synchronizer 6 is connected to the synchronizer meshing gear 11, and "right" means that the synchronizer 6 is connected to the brake meshing gear 7.

[0077] For the power transmission component of this embodiment, by arranging the internal gear and the external gear and making the external gear located in the space surrounded by the internal gear, the distance between the input shaft and the output shaft can be effectively reduced, so that the space occupied by the power transmission component in the radial direction of the input shaft is reduced, which is convenient for arranging the power transmission component on the vehicle.

[0078] Embodiment 2

[0079] This embodiment also relates to a power transmission component, as Figure 2 shown. It has a structure substantially the same as that of the power transmission component in Embodiment 1. The main difference is that a second clutch 9 is provided between the power output end of the engine 11 and the first half shaft 101, and the second motor 13 is omitted in the power transmission component of this embodiment, and the first clutch 8 arranged between the second half shaft 102 and the first intermediate shaft 3 is also omitted. At this time, the second half shaft 102 and the first intermediate shaft 3 can share one shaft or can be processed separately and then connected together.

[0080] For the power transmission component of this embodiment, through the arranged second clutch 9, the power between the first half shaft 101 and the power output end of the engine 11 can be combined or disconnected as needed, which is convenient for controlling the vehicle speed.

[0081] As Figure 2 described in the power transmission assembly, the drivable modes that can be achieved are shown in Table 2.

[0082] Table 2:

[0083]

[0084] It should be noted that in Table 2, taking the power output end of the power transmission assembly in the second embodiment being in transmission connection with the front axle of the four-wheel drive vehicle, and the rear axle of the four-wheel drive vehicle being in transmission connection with the third motor as an example, the drivable modes that can be achieved are introduced. It can be understood here that the power output end of the power transmission assembly in the second embodiment can also be in transmission connection with the rear axle of the four-wheel drive vehicle. At this time, the front axle of the four-wheel drive vehicle can be in transmission connection with the third motor, and in this way, the above-mentioned drivable modes can also be achieved. Of course, it can also be understood that the power transmission assembly in the second embodiment can also be arranged on the axle of a vehicle in a front-wheel drive or rear-wheel drive form.

[0085] The power transmission assembly of this embodiment has substantially the same effect as that of the first embodiment, and will not be elaborated here. In addition, the meanings represented by 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, which is provided with the power transmission assembly of the first embodiment or the second embodiment and a third motor. Among them, the power output end of the power transmission assembly of the first embodiment or the second embodiment is in transmission connection with one of the drive axles of the vehicle, and the third motor is in transmission connection with the other drive axle of the vehicle.

[0088] It should be noted here that the above-mentioned drive axle can be any drive axle of the vehicle. It should also be noted that the third motor can be a generator or a motor. As Figure 2 shown, taking this vehicle as a four-wheel drive vehicle as an example, when the power transmission assembly of the first embodiment or the second embodiment is in transmission connection with the front drive axle, for example, when the output shaft 2 of the power transmission assembly is in transmission connection with the front differential of the front drive axle, the power output end of the third motor is in transmission connection with the rear drive axle of the vehicle. The transmission connection method can be a direct connection or a transmission connection with the rear drive axle through a power transmission assembly such as a gear train. The specific transmission connection method can refer to the structure in the prior art.

[0089] It should be understood that in other types of vehicles, the power output end of the third motor can also be in transmission connection with the front drive axle of the vehicle, while the power transmission assembly of the first embodiment or the second embodiment is in transmission connection with the rear drive axle. It should also be noted here that the third motor can also be a hub motor, and its installation method can refer to the prior art.

[0090] The vehicle of this embodiment, by adopting the power transmission component of Embodiment 1, can reduce the space occupied by the power transmission component in the radial direction of the input shaft, facilitating the arrangement of the power transmission component on the vehicle, thereby making the overall vehicle structure more compact.

[0091] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A power transmission assembly, characterized in that: It comprises an input shaft (1) and an output shaft (2) arranged in parallel; The input shaft (1) is provided with a planetary gear train; The input shaft (1) and the output shaft (2) are connected via a power transmission unit, the power transmission unit comprising at least one set of gear pairs, the gear pairs comprising an external gear (401) and an internal gear (301), the external gear (401) being located in a space surrounded by the internal gear (301) and meshingly connected with the internal gear (301).

2. The power transmission assembly according to claim 1, characterized in that: The input shaft (1) comprises a first half shaft (101) and a second half shaft (102), the sun gear (501) of the planetary gear train is loosely mounted on the first half shaft (101), the planet carrier (502) of the planetary gear train is connected to the first half shaft (101), and the ring gear (503) of the planetary gear train is connected to the second half shaft (102); The power transmission unit is connected between the second half shaft (102) and the output shaft (2).

3. The power transmission assembly according to claim 2, characterized in that: A hollow shaft (103) is sleeved on the first half shaft (101), and the sun gear (501) is connected to one end of the hollow shaft (103); The first half shaft (101) is provided with a synchronous meshing gear (1011), the housing of the power transmission component is provided with a braking meshing gear (7), the braking meshing gear (7) is loosely sleeved on the hollow shaft (103), and a synchronizer (6) is provided on the end of the hollow shaft (103) away from the sun gear (501), the synchronizer (6) can be selectively connected to the synchronous meshing gear (1011), and the synchronizer (6) can be selectively connected to the braking meshing gear (7).

4. The power transmission assembly according to claim 2, characterized in that: The power transmission unit comprises a first intermediate shaft (3) and a second intermediate shaft (4); The first intermediate shaft (3) is connected to the second half shaft (102), the first intermediate shaft (3) and the second half shaft (102) are coaxially arranged, the first intermediate shaft (3) and the second intermediate shaft (4) are transmission-connected via the gear pair, and the second intermediate shaft (4) and the output shaft (2) are transmission-connected.

5. The power transmission assembly according to claim 4, characterized in that: A first clutch (8) is provided between the first intermediate shaft (3) and the second half shaft (102), and the first clutch (8) is used to control power on and off between the first intermediate shaft (3) and the second half shaft (102); and / or, The second intermediate shaft (4) is provided with a driving gear (402), the output shaft (2) is provided with a driven gear (201), and the driving gear (402) and the driven gear (201) are meshed and connected.

6. The power transmission assembly according to any one of claims 2 to 5, characterized in that: It also includes a first motor (12), wherein the power output end of the first motor (12) is a rotor (1201) having an accommodation space formed therein; The planetary gear train is located in the accommodation space of the rotor (1201), and the sun gear (501) in the planetary gear train is drivingly connected to the rotor (1201).

7. The power transmission assembly according to claim 6, characterized in that: Also includes an engine (11); The power output end of the engine (11) is directly connected to the first half shaft (101); and / or, A second clutch (9) is provided between the power output end of the engine (11) and the first half shaft (101).

8. The power transmission assembly according to claim 6, characterized in that: It also includes a second motor (13), wherein a power output end of the second motor (13) is connected to the output shaft (2).

9. The power transmission assembly according to claim 8, characterized in that: A transmission gear is provided on the outer peripheral wall of the internal gear (301), and a motor gear (1301) is provided at the power output end of the second motor (13), and the motor gear (1301) is meshed and connected with the transmission gear.

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

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