Power system and vehicle

Abstract

The power system comprises an input shaft, an output shaft, a planetary gear train and a first motor, the input shaft and the output shaft are arranged in parallel, the input shaft comprises a first half shaft and a second half shaft, a planet carrier of the planetary gear train is connected with the first half shaft, and a sun gear of the planetary gear train is connected with the second half shaft. A gear ring of the planetary gear train is in transmission connection with the output shaft; a gear pair is arranged between the power output end and the output shaft of the first motor, a first synchronizer is arranged on the power output end and / or the output shaft of the first motor, and the first synchronizer is selectively connected with the gear pair and can control power connection and disconnection between the power output end and the output shaft of the first motor. According to the power system, the first synchronizer is disconnected from the gear pair, so that when a power source except the first motor is adopted for driving, the first motor can be prevented from being dragged, dragging loss can be reduced, and energy can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power systems, and particularly relates to a power system. At the same time, the utility model also relates to a vehicle applying the power system. Background Art

[0002] A vehicle generally refers to a non-railborne vehicle driven by power and having four or more wheels, mainly used for carrying passengers and / or goods, as well as performing certain specific operations. According to the power source, vehicles are divided into fuel vehicles, electric vehicles, hybrid vehicles, etc.

[0003] The power system on a vehicle refers to the mechanism that provides power for the vehicle, mainly composed of two major parts: a power source system and a transmission system. Among them, the power source can 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 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, make the engine 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).

[0005] The power system of existing vehicles is driven by the original single engine and gradually to the current co-driving of the engine and the motor. In some vehicles, in order to improve the load-carrying capacity, in addition to the commonly used gear pairs with external gear meshing in the transmission, a planetary gear train is also adopted. However, in the power system of such vehicles, during the operation of the transmission, it will drive the first motor to rotate synchronously, causing drag loss, wasting energy, and being unfavorable for improving the economy of vehicle use. Summary of the Utility Model

[0006] In view of this, the utility model aims to propose a power system to facilitate reducing drag loss and thus saving energy.

[0007] To achieve the above object, the technical solution of the utility model is realized as follows:

[0008] A power system: includes a parallelly arranged input shaft and output shaft, as well as a planetary gear train and a first motor, wherein:

[0009] The input shaft includes a first half shaft and a second half shaft. The planet carrier of the planetary gear train is connected to the first half shaft, the sun gear of the planetary gear train is connected to the second half shaft, and there is a transmission connection between the ring gear of the planetary gear train and the output shaft;

[0010] A gear pair is provided between the power output end of the first motor and the output shaft. A first synchronizer is provided on the power output end of the first motor and / or the output shaft. The first synchronizer selectively connects the gear pair, so as to control the on / off of the power between the power output end of the first motor and the output shaft.

[0011] Further, a motor driving gear is provided at the power output end of the first motor, and a motor driven gear is sleeved on the output shaft in an idle manner. The motor driving gear and the motor driven gear are meshed and connected.

[0012] The first synchronizer is provided on the output shaft, and the first synchronizer selectively connects the motor driven gear.

[0013] Further, a hollow shaft is sleeved on the second half shaft, and the hollow shaft is connected to the ring gear.

[0014] A first meshing gear is provided on the hollow shaft, and a second meshing gear is sleeved on the second half shaft in an idle manner. The second meshing gear is provided on the housing of the power system.

[0015] A second synchronizer is provided on the second half shaft. The second synchronizer selectively connects the first meshing gear, and the second synchronizer selectively connects the second meshing gear.

[0016] Further, a first force transmission unit is provided between one of the ring gear and the hollow shaft and the output shaft. A second force transmission unit is provided between the hollow shaft and the output shaft. A third synchronizer is provided on the hollow shaft and / or the output shaft.

[0017] The third synchronizer selectively connects the first force transmission unit, and the third synchronizer selectively connects the second force transmission unit.

[0018] Further, the first force transmission unit includes a first driving gear sleeved on the hollow shaft in an idle manner, and a first driven gear provided on the output shaft. The first driving gear and the first driven gear are meshed and connected.

[0019] The second force transmission unit includes a second driving gear sleeved on the hollow shaft in an idle manner, and a second driven gear provided on the output shaft. The second driving gear and the second driven gear are meshed and connected.

[0020] The third synchronizer is provided on the hollow shaft. The third synchronizer selectively connects the first driving gear, and the third synchronizer selectively connects the second driving gear.

[0021] Further, the first force transmission unit includes a first driving gear disposed on the hollow shaft or the gear ring, and a first driven gear sleeved on the output shaft, and the first driving gear and the first driven gear are meshed and connected;

[0022] The second force transmission unit includes a second driving gear disposed on the hollow shaft, and a second driven gear sleeved on the output shaft, and the second driving gear and the second driven gear are meshed and connected;

[0023] The third synchronizer is disposed on the output shaft, and the third synchronizer selectively connects the first driven gear and selectively connects the second driven gear.

[0024] Further, an output gear is disposed on the output shaft, and the output gear is disposed at a position of the output shaft close to the first half shaft, and the output gear is used for driving connection with a differential.

[0025] Further, an engine is further included, and a power output end of the engine is connected to the first half shaft.

[0026] Further, a second motor is further included, and a power output end of the second motor is connected to the second half shaft;

[0027] The engine and the second motor are respectively disposed at two ends of the input shaft.

[0028] A vehicle is provided with the power system, and the power system is in driving connection with one of the drive axles of the vehicle; a third motor is further disposed on the vehicle, and the third motor is in driving connection with the other drive axle of the vehicle.

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

[0030] In the power system of the present utility model, a planetary gear train is disposed on the input shaft, which is beneficial to improving the load-bearing capacity of the power system. A gear pair is disposed between the power output end of the first motor and the output shaft, and the first synchronizer is combined with the gear pair, so that the power of the first motor can be output to the output shaft to drive the vehicle to travel. When the first synchronizer is disconnected from the gear pair, when driving with a power source other than the first motor, it can prevent dragging the first motor, which is beneficial to reducing the dragging loss, thereby saving energy and improving the economy of vehicle use.

[0031] In addition, a motor driving gear is disposed at the power output end of the first motor, a motor driven gear is disposed on the output shaft, and the first synchronizer is disposed on the output shaft. When the power between the power output end of the first motor and the output shaft is disconnected, it does not affect the power transmission of other gears, and the number of other gears remains unchanged.

[0032] Furthermore, a hollow shaft is provided on the second half shaft, and a first meshing gear, a second meshing gear and a second synchronizer are provided. By engaging the first meshing gear through the second synchronizer, the sun gear and the ring gear can be synchronously rotated. And by engaging the second meshing gear through the second synchronizer, the sun gear can be braked to make the rotational speed of the sun gear be 0. When the power is transmitted from the first half shaft to the hollow shaft through the planetary gear train, two gears can be realized, which is beneficial to increasing the gear modes of the power system. At the same time, the second synchronizer can also realize gear shifting, and the gear shifting is convenient. When applied to a vehicle, it is beneficial to increase the driving comfort.

[0033] In addition, a first power transmission unit and a second power transmission unit are provided at the same time. By selecting the first power transmission unit or the second power transmission unit through a third synchronizer, the switching between two gears can be conveniently realized.

[0034] The first power transmission unit includes a first driving gear and a first driven gear. The third synchronizer is arranged on the hollow shaft or the output shaft, with a simple structure, less occupied space, convenient for overall layout. Cooperating with the planetary gear train, the number of gears can be increased, which is convenient for the driver to select.

[0035] Moreover, an output gear is provided, so that the power transmitted to the output shaft for each gear can be output through the output gear, and the overall layout is more convenient.

[0036] And the power source includes an engine. The connection modes include two connection modes: directly connecting the power output end of the engine to the first half shaft, and arranging a clutch between the power output end of the engine and the first half shaft. Directly connecting the first half shaft and the power output end of the engine can directly transmit the power of the engine to the first half shaft. This structure without a clutch has the beneficial effects of better weight reduction and cost reduction. And arranging a clutch between the first half shaft and the power output end of the engine enables the power between the first half shaft and the power output end of the engine to be engaged or disengaged as needed. When disengaged, it is convenient for gear shifting.

[0037] At the same time, a second motor is provided, and the power output end of the second motor is connected to the second half shaft, forming a structure in which the power output end of the second motor is in transmission connection with the sun gear, so that the power of the second motor can be transmitted to the hollow shaft through the sun gear, thereby facilitating power output and enabling the vehicle to be driven by the second motor. The engine and the second motor are respectively arranged at both ends of the input shaft, which is convenient to realize modes such as series connection, power splitting and direct drive. The engine can work to charge the second motor, which is beneficial to saving energy. The second motor can also be used as the starting motor of the engine, saving the cost of separately matching a starting motor for the engine. At the same time, the engine and the second motor can also jointly output power, so that the power system has a hybrid drive mode.

[0038] Furthermore, the first synchronizer is set, when the first synchronizer is disconnected from the motor driven gear, the engine charges the first motor, and when the first motor is used as the engine starting motor, there is no need to reversely drag the first motor, which is conducive to energy saving. When the first synchronizer is engaged with the motor driven gear, the first motor can cooperate with the engine and / or the second motor to increase the power performance of the vehicle. When the third synchronizer is disconnected from both the first driving gear and the second driving gear, the first motor can output power alone by engaging the first synchronizer with the motor driven gear, so that the power system has a pure electric drive mode.

[0039] Another object of the utility model is to provide a vehicle, which is provided with the power system and the third motor as described above, the power output end of the third motor is drivingly connected to one drive axle of the vehicle, and the power system is drivingly connected to the other drive axle of the vehicle.

[0040] The vehicle described in the utility model has a compact overall structure by applying the above power system. The power of the engine, the first motor and the second motor can be transmitted to the output shaft separately or combined and transmitted to the output shaft, so that the power system can realize more driving modes, which is beneficial to improving the driver's choice range and driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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:

[0042] Figure 1 This is a structural view of the power system described in Embodiment 1 of the present utility model;

[0043] Figure 2 This is a structural view of the first force transmission unit and the second force transmission unit described in Embodiment 1 of the present utility model;

[0044] Figure 3 This is a structural view of the power system described in Embodiment 2 of the present utility model;

[0045] Figure 4 This is a structural view of the first force transmission unit and the second force transmission unit described in the second embodiment of the present utility model;

[0046] Description of reference numerals:

[0047] 1. Input shaft; 2. Output shaft; 4. Hollow shaft; 5. First synchronizer; 6. Second synchronizer; 7. Third synchronizer;

[0048] 101, first half shaft; 102, second half shaft; 1021, second meshing gear;

[0049] 201. Motor driven gear; 202. First driven gear; 203. Second driven gear; 204. Output gear;

[0050] 301. Planet carrier; 302. Sun gear; 303. Ring gear; 304. Planet gear;

[0051] 401. First meshing gear; 402. First driving gear; 403. Second driving gear;

[0052] 11. Engine; 22. First motor; 33. Second motor; 44. Differential;

[0053] 2201. Motor driving gear; 4401. Input gear. Detailed implementation mode

[0054] 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.

[0055] In the description of the present utility model, it should be noted that based on the orientation or positional relationship shown in the drawings, it 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 cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "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 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.

[0057] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0058] This embodiment relates to a power system. Compared with the existing gearbox, the first synchronizer 5 is combined with the gear pair, and the power of the first motor 22 can be output to the output shaft 2 for driving the vehicle to travel. When the first synchronizer 5 is disconnected from the gear pair, the rotation of the output shaft 2 will not drive the first motor 22 to rotate. When driving with a power source other than the first motor 22, it can prevent dragging the first motor 22, which is beneficial to reducing the dragging loss, thus saving energy and improving the economy of vehicle use.

[0059] Based on the above design concept, an exemplary structure of the power system in this embodiment is as follows Figures 1 to 4 As shown, in terms of the overall structure, the power system in this embodiment includes an input shaft 1 and an output shaft 2 arranged in parallel, a planetary gear train, and a first motor 22, where:

[0060] The input shaft 1 includes a first half shaft 101 and a second half shaft 102. The planet carrier 301 of the planetary gear train is connected to the first half shaft 101, the sun gear 302 of the planetary gear train is connected to the second half shaft 102, and there is a transmission connection between the ring gear 303 of the planetary gear train and the output shaft 2. A gear pair is provided between the power output end of the first motor 22 and the output shaft 2, and a first synchronizer 5 is provided on the power output end of the first motor 22 and / or the output shaft 2. The first synchronizer 5 selectively connects the gear pair, and can control the on-off of the power between the power output end of the first motor 22 and the output shaft 2.

[0061] Setting the planetary gear train on the input shaft 1 is beneficial to improving the load-bearing capacity of the power system. A gear pair is set between the power output end of the first motor 22 and the output shaft 2. When the first synchronizer 5 is combined with the gear pair, the power of the first motor 22 can be output to the output shaft 2 to drive the vehicle. When the first synchronizer 5 is disconnected from the gear pair, when driving with a power source other than the first motor 22, it can prevent dragging the first motor 22, which is beneficial to reducing the dragging loss, thus saving energy and improving the economy of vehicle use.

[0062] In addition, in this embodiment, as a preferred implementation form, referring to Figure 1 As shown, a motor driving gear 2201 is provided at the power output end of the first motor 22, and a motor driven gear 201 is sleeved on the output shaft 2. The motor driving gear 2201 and the motor driven gear 201 are meshed and connected. The first synchronizer 5 is provided on the output shaft 2, and the first synchronizer 5 selectively connects the motor driven gear 201.

[0063] When the first synchronizer 5 is engaged with the motor driven gear 201, the power of the first motor 22 can be transmitted to the output shaft 2 through the motor driving gear 2201, the motor driven gear 201, and the first synchronizer 5. When the first synchronizer 5 is disconnected from the motor driven gear 201, the power cannot be transmitted between the power output end of the first motor 22 and the output shaft 2, and the first motor 22 will not affect the force received on the input shaft 1, which is beneficial to saving energy.

[0064] In addition, the motor driving gear 2201 can be sleeved on the power output end of the first motor 22 in an idle manner. A first synchronizer 5 is provided at the power output end of the first motor 22. The first synchronizer 5 selectively connects the motor driving gear 2201, and can also control the power on / off between the power output end of the first motor 22 and the output shaft 2. At this time, the motor driven gear 201 can be sleeved on the output shaft 2 in an idle manner or can be fixedly arranged on the output shaft 2. Preferably, at this time, the motor driven gear 201 is fixedly arranged on the output shaft 2, and the first synchronizer 5 on the output shaft 2 can be omitted. When the motor driven gear 201 is sleeved on the output shaft 2 in an idle manner, a first synchronizer 5 that selectively connects the motor driven gear 201 needs to be provided on the output shaft 2.

[0065] In this embodiment, as a preferred implementation form, refer to Figure 1 As shown, a hollow shaft 4 is sleeved on the second half shaft 102, and the hollow shaft 4 is connected to the ring gear 303. A first meshing gear 401 is provided on the hollow shaft 4, and a second meshing gear 1021 is sleeved on the second half shaft 102 in an idle manner. The second meshing gear 1021 is arranged on the housing of the power system. A second synchronizer 6 is provided on the second half shaft 102. The second synchronizer 6 selectively connects the first meshing gear 401 and selectively connects the second meshing gear 1021.

[0066] Specifically, when the power is transmitted from the first half shaft 101 to the hollow shaft 4, the first half shaft 101 will drive the planet carrier 301 connected thereto and the planet gears 304 on the planet carrier 301 to rotate. When the second synchronizer 6 engages the first meshing gear 401, since the second synchronizer 6 is arranged on the second half shaft 102, and the second half shaft 102 is connected to the sun gear 302, the first meshing gear 401 is arranged on the hollow shaft 4, and the hollow shaft 4 is connected to the ring gear 303, both the ring gear 303 and the sun gear 302 can rotate.

[0067] However, when the planet carrier 301 and the planet gears 304 thereon drive the ring gear 303 to rotate, the ring gear 303 will drive the first meshing gear 401 to rotate synchronously through the hollow shaft 4. The second synchronizer 6 engaged with the first meshing gear 401 will drive the sun gear 302 to rotate in the same direction and at the same speed through the second half shaft 102. Therefore, the ring gear 303, the sun gear 302 and the hollow shaft 4 rotate synchronously.

[0068] When the second synchronizer 6 engages the second meshing gear 1021, since the second meshing gear 1021 is arranged on the housing, the second meshing gear 1021 always remains stationary. The second synchronizer 6 engaged with the second meshing gear 1021 will drive the sun gear 302 to remain stationary through the second half shaft 102, so that the rotational speed of the sun gear 302 is 0. The first half shaft 101 will drive the ring gear 303 and the hollow shaft 4 connected to the ring gear 303 to rotate through the planet carrier 301.

[0069] Thus, it can be concluded that when the power is transmitted from the first half shaft 101 to the hollow shaft 4 through the planetary gear train, two gears can be realized, which is beneficial to increasing the gear modes of the power system. At the same time, the second synchronizer 6 can also realize gear shifting, and the gear shifting is convenient. When applied to a vehicle, it is beneficial to increase the driving comfort.

[0070] Moreover, in this embodiment, as a preferred implementation form, refer to Figure 1 As shown, a first power transmission unit is provided between one of the ring gear 303 and the hollow shaft 4 and the output shaft 2, a second power transmission unit is provided between the hollow shaft 4 and the output shaft 2, and a third synchronizer 7 is provided on the hollow shaft 4 and / or the output shaft 2. The third synchronizer 7 selectively connects to the first power transmission unit, and the third synchronizer 7 selectively connects to the second power transmission unit. The simultaneously provided first power transmission unit and second power transmission unit can select to connect the first power transmission unit or the second power transmission unit through the third synchronizer 7 to realize the switching of two gears, and the operation is convenient.

[0071] Among them, in this embodiment, as a preferred implementation form, refer to Figure 2 As shown, the first power transmission unit includes a first driving gear 402 sleeved on the hollow shaft 4 and a first driven gear 202 provided on the output shaft 2, and the first driving gear 402 and the first driven gear 202 are meshed and connected. The second power transmission unit includes a second driving gear 403 sleeved on the hollow shaft 4 and a second driven gear 203 provided on the output shaft 2, and the second driving gear 403 and the second driven gear 203 are meshed and connected. The third synchronizer 7 is provided on the hollow shaft 4, and the third synchronizer 7 selectively connects to the first driving gear 402, and the third synchronizer 7 selectively connects to the second driving gear 403.

[0072] Generally speaking, when the third synchronizer 7 is connected to the first driving gear 402, the rotation of the hollow shaft 4 will drive the first driving gear 402 to rotate synchronously. At this time, the first driving gear 402 can drive the output shaft 2 to rotate through the first driven gear 202 meshed with it. Similarly, when the third synchronizer 7 is connected to the second driving gear 403, the rotation of the hollow shaft 4 will drive the second driving gear 403 to rotate synchronously. At this time, the second driving gear 403 can drive the output shaft 2 to rotate through the second driven gear 203 meshed with it.

[0073] In addition, the diameter of the first driving gear 402 is smaller than that of the second driving gear 403. From this, it can be obtained that when the hollow shaft 4 drives the output shaft 2 to rotate through the meshed first driving gear 402 and first driven gear 202, the torque is greater. On the contrary, when the hollow shaft 4 drives the output shaft 2 to rotate through the meshed second driving gear 403 and second driven gear 203, the torque is smaller, but the speed is faster.

[0074] In this way, two gear positions can be achieved under the action of the third synchronizer 7, which is beneficial to increasing the gear position modes of the power system. At the same time, gear shifting is convenient, and the structures of the first power transmission unit and the second power transmission unit are simple, occupying less space, facilitating the overall layout. When cooperating with the planetary gear train, the number of gear positions can be increased, facilitating the driver's selection.

[0075] Embodiment 2

[0076] This embodiment relates to a power system, as Figure 3 shown, which has substantially the same structure as the power system of Embodiment 1. The main difference is that the third synchronizer 7 is arranged on the output shaft 2. Among them, the first power transmission unit includes a first driving gear 402 arranged on the hollow shaft 4 or the gear ring 303, and a first driven gear 202 sleeved on the output shaft 2, and the first driving gear 402 and the first driven gear 202 are meshed and connected.

[0077] In addition, the second power transmission unit includes a second driving gear 403 arranged on the hollow shaft 4, and a second driven gear 203 sleeved on the output shaft 2, and the second driving gear 403 and the second driven gear 203 are meshed and connected. The third synchronizer 7 is arranged on the output shaft 2, and the third synchronizer 7 selectively connects the first driven gear 202, and the third synchronizer 7 selectively connects the second driven gear 203.

[0078] Specifically, when the hollow shaft 4 rotates, it will drive the first driving gear 402 and the second driving gear 403 to rotate synchronously, and the first driven gear 202 and the second driven gear 203 sleeved on the output shaft 2 will also rotate accordingly. When the third synchronizer 7 on the output shaft 2 is connected to the first driven gear 202, the first driven gear 202 will drive the output shaft 2 to rotate, and when the third synchronizer 7 on the output shaft 2 is connected to the second driven gear 203, the second driven gear 203 will drive the output shaft 2 to rotate. In this way, the power on the hollow shaft 4 can be transmitted to the output shaft 2, and during the transmission process, according to different situations, the third synchronizer 7 can be controlled to be connected to the first driven gear 202 or the second driven gear 203.

[0079] Since the diameter of the first driving gear 402 is small, the diameter of the first driven gear 202 meshing with it will be large, and the rotational speed output from the hollow shaft 4 to the output shaft 2 will decrease, while the torque increases, which is suitable for low-speed driving or situations requiring high torque. And the second driving gear 403 is large, so the diameter of the second driven gear 203 meshing with it will be small, and the rotational speed output from the hollow shaft 4 to the output shaft 2 will increase, while the torque decreases, which is suitable for high-speed driving.

[0080] In addition, in this embodiment, as a preferred implementation form, refer to Figure 3As shown, an output gear 204 is provided on the output shaft 2. The output gear 204 is arranged at a position on the output shaft 2 close to the first half shaft 101. The output gear 204 is used for driving connection with the input gear 4401 of the differential 44. By setting the output gear 204, the power transmitted to the output shaft 2 in each gear can be output through the output gear 204, and the overall layout is more convenient. And by arranging the output gear 204 at a position close to the first half shaft 101, the structure is more compact, the vehicle interior space can be better utilized, and the space utilization rate can be improved.

[0081] Among them, in this embodiment, as a preferred implementation form, refer to Figure 4 As shown, the power system further includes an engine 11. The power output end of the engine 11 is connected to the first half shaft 101. The power source includes the engine 11, and the connection methods include directly connecting the power output end of the engine 11 to the first half shaft 101 and setting a clutch between the power output end of the engine 11 and the first half shaft 101. Directly connecting the first half shaft 101 and the power output end of the engine 11 can make the power of the engine 11 be directly transmitted to the first half shaft 101. This structure without a clutch has the beneficial effects of better reducing weight and cost. And setting a clutch between the first half shaft 101 and the power output end of the engine 11 enables the power between the first half shaft 101 and the power output end of the engine 11 to be engaged or disengaged as needed, which is convenient for gear shifting.

[0082] In addition, in this embodiment, as a preferred implementation form, refer to Figure 4 As shown, the power system further includes a second motor 33. The power output end of the second motor 33 is connected to the second half shaft 102. The engine 11 and the second motor 33 are respectively arranged at both ends of the input shaft 1. By setting the second motor 33 and connecting the power output end of the second motor 33 to the second half shaft 102, a structure is formed in which the power output end of the second motor 33 is in driving connection with the sun gear 302, so that the power of the second motor 33 can be transmitted to the hollow shaft 4 through the sun gear 302, thereby facilitating power output and enabling the vehicle to be driven by the second motor 33.

[0083] By arranging the engine 11 and the second motor 33 at both ends of the input shaft 1 respectively, it is convenient to realize modes such as series connection, power split, and direct drive. When the engine 11 operates, it can charge the second motor 33, which is beneficial to energy conservation. The second motor 33 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 second motor 33 can also jointly output power, so that the power system has a hybrid drive mode.

[0084] The first synchronizer 5 is set. When the first synchronizer 5 is disconnected from the motor driven gear 201, the engine 11 charges the first motor 22, and when the first motor 22 is used as the starting motor of the engine 11, there is no need to reversely drag the first motor 22, which is conducive to saving energy. When the first synchronizer 5 is engaged with the motor driven gear 201, the first motor 22 can cooperate with the engine 11 and / or the second motor 33 to increase the power performance of the vehicle. When the third synchronizer 7 is disconnected from the first driving gear 402 and the second driving gear 403, the first motor 22 can output power alone by engaging the first synchronizer 5 with the motor driven gear 201, so that the power system has a pure electric drive mode.

[0085] Embodiment 3

[0086] This embodiment relates to a vehicle, on which the power system of the first or second embodiment is provided, the power system is drivingly connected to one drive axle of the vehicle, and the vehicle is also provided with a third motor, the third motor is drivingly connected to another drive axle of the vehicle.

[0087] By applying a power system such as that of Example 1 or Example 2, the overall structure of the vehicle is made compact, and the power of the engine 11, the first motor 22, and the second motor 33 can be transmitted to the output shaft 2 individually or combined and transmitted to the output shaft 2, so that the power system can realize more driving modes, which is beneficial to improving the driver's range of choices and driving comfort.

[0088] As a preferred embodiment, the vehicle is provided with a third motor, and the power output end of the third motor is transmission connected to one of the drive axles of the vehicle. The power system of embodiment one is transmission connected to another drive axle of the vehicle. The drive axle mentioned here can also be any drive axle of the vehicle.

[0089] 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 system of Example 1 is transmission-connected to the front drive axle, for example, when the output shaft 2 of the power system is transmission-connected to the front differential 44 of the front drive axle, the power output end of the third motor is transmission-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.

[0090] 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 system of the first 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.

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

Claims

1. A power system, characterized in that: It comprises an input shaft (1) and an output shaft (2) arranged in parallel, a planetary gear train and a first motor (22); The input shaft (1) comprises a first half shaft (101) and a second half shaft (102); the planet carrier (301) of the planetary gear train is connected to the first half shaft (101); the sun gear (302) of the planetary gear train is connected to the second half shaft (102); and the ring gear (303) of the planetary gear train is transmission-connected to the output shaft (2); A gear pair is provided between the power output end of the first motor (22) and the output shaft (2); a first synchronizer (5) is provided on the power output end of the first motor (22) and / or the output shaft (2); the first synchronizer (5) selectively connects the gear pair and is capable of controlling the power on / off between the power output end of the first motor (22) and the output shaft (2).

2. The power system according to claim 1, characterized in that: A motor driving gear (2201) is provided at the power output end of the first motor (22), a motor driven gear (201) is sleeved on the output shaft (2), and the motor driving gear (2201) and the motor driven gear (201) are meshed and connected; The first synchronizer (5) is arranged on the output shaft (2), and the first synchronizer (5) is selectively connected to the motor driven gear (201).

3. The power system according to claim 1, characterized in that: A hollow shaft (4) is sleeved on the second half shaft (102), and the hollow shaft (4) is connected to the gear ring (303); The hollow shaft (4) is provided with a first meshing gear (401), the second half shaft (102) is hollowly sleeved with a second meshing gear (1021), and the second meshing gear (1021) is provided on the housing of the power system; The second half shaft (102) is provided with a second synchronizer (6), the second synchronizer (6) is selectively connected to the first meshing gear (401), and the second synchronizer (6) is selectively connected to the second meshing gear (1021).

4. The power system according to claim 3, characterized in that: A first force transmission unit is provided between one of the gear ring (303) and the hollow shaft (4) and the output shaft (2), a second force transmission unit is provided between the hollow shaft (4) and the output shaft (2), and a third synchronizer (7) is provided on the hollow shaft (4) and / or the output shaft (2); The third synchronizer (7) is selectively connected to the first force transmission unit, and the third synchronizer (7) is selectively connected to the second force transmission unit.

5. The power system according to claim 4, characterized in that: The first force transmission unit comprises a first driving gear (402) loosely sleeved on the hollow shaft (4), and a first driven gear (202) arranged on the output shaft (2), the first driving gear (402) and the first driven gear (202) being meshed and connected; The second force transmission unit comprises a second driving gear (403) loosely sleeved on the hollow shaft (4), and a second driven gear (203) arranged on the output shaft (2), the second driving gear (403) and the second driven gear (203) being meshed and connected; The third synchronizer (7) is arranged on the hollow shaft (4), the third synchronizer (7) is selectively connected to the first driving gear (402), and the third synchronizer (7) is selectively connected to the second driving gear (403).

6. The power system according to claim 4, characterized in that: The first force transmission unit comprises a first driving gear (402) arranged on the hollow shaft (4) or the gear ring (303), and a first driven gear (202) loosely sleeved on the output shaft (2), the first driving gear (402) and the first driven gear (202) being meshed and connected; The second force transmission unit comprises a second driving gear (403) arranged on the hollow shaft (4), and a second driven gear (203) loosely sleeved on the output shaft (2), the second driving gear (403) and the second driven gear (203) being meshed and connected; The third synchronizer (7) is arranged on the output shaft (2), the third synchronizer (7) is selectively connected to the first driven gear (202), and the third synchronizer (7) is selectively connected to the second driven gear (203).

7. The power system according to claim 1, characterized in that: An output gear (204) is provided on the output shaft (2). The output gear (204) is arranged at a position of the output shaft (2) close to the first half shaft (101). The output gear (204) is used for transmission connection with a differential (44).

8. The power system according to any one of claims 1 to 7, characterized in that: It also includes an engine (11), wherein a power output end of the engine (11) is connected to the first half shaft (101).

9. The power system according to claim 8, characterized in that: It also includes a second motor (33), wherein a power output end of the second motor (33) is connected to the second half shaft (102); The engine (11) and the second motor (33) are disposed at two ends of the input shaft (1).

10. A vehicle, characterized in that: The vehicle is provided with a power system according to any one of claims 1 to 9, and the power system is drivingly connected to one of the drive axles of the vehicle; The vehicle is also provided with a third motor, which is drivingly connected to another drive axle of the vehicle.

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