Hybrid power system and vehicle with same

Abstract

The utility model discloses a hybrid power system and a vehicle with the hybrid power system, the hybrid power system comprises an engine, a transmission, a first motor and a second motor, the output end of the transmission is connected with a first driving half shaft; an output shaft of the first motor is connected with the transmission; the second motor is connected with the second driving half shaft through a transmission mechanism; the transmission comprises a power input shaft, a planetary mechanism, a first gear pair, a second gear pair and a power output shaft, the planetary mechanism is connected with the power input shaft and an output shaft of the first motor, the power input shaft and the power output shaft are in transmission connection through the first gear pair, and the power output shaft and the first driving half shaft are in transmission connection through the second gear pair. According to the hybrid power system, the first motor is integrated on the transmission, and the second motor can independently provide driving force under the working condition that the front wheels slip, so that normal operation of the vehicle is guaranteed, the vehicle has a four-wheel-drive function, and the performance of the vehicle is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power systems, and in particular to a hybrid power system and a vehicle having the same. Background Art

[0002] In related technologies, hybrid vehicles mainly use dual-motor front-wheel drive. One is to equip different gears in the engine section to access direct drive in a timely manner; the other is to make full use of the advantage that the planetary gear train can adjust the speed, and the engine can adjust the torque and the rotational speed direction, so that the engine works in an efficient area and reduces the fuel consumption of the whole vehicle. However, both of the above two methods integrate two motors in the transmission to achieve the front-wheel drive function, and cannot solve the problem of getting out of trouble under special working conditions. For example, when the front wheels slip, the vehicle will lose power and cannot move. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a hybrid power system. Under the condition of front-wheel slip, the second motor can independently provide driving force to ensure the normal operation of the vehicle, and enable the vehicle to have four-wheel drive function, greatly improving the performance of the vehicle and the user experience.

[0004] Another object of the utility model is to provide a vehicle including the above hybrid power system.

[0005] The hybrid power system according to the first aspect embodiment of the utility model includes: an engine; a transmission, the input end of the transmission is connected to the output shaft of the engine, the output end of the transmission is connected to a first drive half shaft, and the first drive half shaft is connected to the front wheels of the vehicle; a first motor, the output shaft of the first motor is connected to the transmission; a second motor, the second motor is connected to a second drive half shaft through a transmission mechanism, and the second drive half shaft is connected to the rear wheels of the vehicle; wherein, the transmission includes a power input shaft, a planetary mechanism, a first gear pair, a second gear pair and a power output shaft, the power input shaft is connected to the output shaft of the engine, the planetary mechanism is respectively connected to the power input shaft and the output shaft of the first motor, the power input shaft and the power output shaft are connected by the first gear pair, and the power output shaft and the first drive half shaft are connected by the second gear pair.

[0006] According to the hybrid power system of the embodiment of the present utility model, by connecting the first motor to the transmission, connecting the second motor to the rear wheels through a transmission mechanism and a second drive half shaft, and connecting the planetary mechanism of the transmission to the output shafts of the engine and the first motor respectively. Thus, the first motor can be integrated on the transmission, so that under the condition of front wheel slip, the second motor can independently provide driving force to ensure the normal operation of the vehicle. The vehicle has four-wheel drive function, greatly improving the performance of the vehicle and the user experience. The transmission makes full use of the advantage that the planetary mechanism can adjust the speed, enabling the speed and torque of the engine to be adjusted, making the operation of the hybrid power system more flexible and conducive to further reducing fuel consumption.

[0007] According to some embodiments of the present utility model, the hybrid power system further includes: a first differential, an input end of the first differential is connected to the second gear pair, and an output end of the first differential is connected to the first drive half shaft; a second differential, an input end of the second differential is connected to the output shaft of the second motor, and an output end of the second differential is connected to the second drive half shaft.

[0008] According to some embodiments of the present utility model, the transmission further includes a shift mechanism, the shift mechanism is arranged on the power output shaft, and the shift mechanism is switchable between a first state and a second state; when the shift mechanism is in the first state, the power of the power input shaft is transmitted to the first differential through the first gear pair, the power output shaft and the second gear pair; when the shift mechanism is in the second state, the power transmission between the power input shaft and the first differential is disconnected.

[0009] According to some embodiments of the present utility model, the first gear pair includes a first driving gear and a first driven gear that mesh with each other, the first driving gear is connected to the planetary mechanism, and the first driven gear is arranged on the power output shaft; the second gear pair includes a second driving gear and a second driven gear that mesh with each other, the second driving gear is arranged on the power output shaft, and the second driven gear is connected to the first differential; wherein, when the shift mechanism is in the first state, the shift mechanism is connected to the second driving gear or the first driven gear.

[0010] According to some embodiments of the present utility model, the transmission further includes: a housing, the housing is internally provided with the power input shaft, the planetary mechanism, the first gear pair, the second gear pair and the shift mechanism; a fixed wheel, the fixed wheel is arranged on the power output shaft, and the fixed wheel is fixedly connected to the housing, when the shift mechanism is in the second state, the shift mechanism is connected to the fixed wheel.

[0011] According to some embodiments of the present utility model, the planetary mechanism includes: a ring gear, which is connected to the first driving gear; a planet carrier, which is arranged inside the ring gear and connected to the output shaft of the engine; planet gears, which are connected to the planet carrier; a sun gear, which meshes with the planet gears and is connected to the output shaft of the first motor.

[0012] According to some embodiments of the present utility model, the transmission mechanism includes: a transmission shaft; a third gear pair, the output shaft of the second motor is in transmission connection with the transmission shaft through the third gear pair; a fourth gear pair, the transmission shaft is in transmission connection with the second differential through the fourth gear pair.

[0013] According to some embodiments of the present utility model, the third gear pair includes a third driving gear and a third driven gear that mesh with each other, the third driving gear is arranged on the output shaft of the second motor, and the third driven gear is arranged on the transmission shaft; the fourth gear pair includes a fourth driving gear and a fourth driven gear that mesh with each other, the fourth driving gear is arranged on the transmission shaft, and the fourth driven gear is connected to the second differential.

[0014] According to some embodiments of the present utility model, the hybrid power system further includes: a shock absorber, which is arranged on the power input shaft and located between the engine and the planetary mechanism.

[0015] A vehicle according to an embodiment of the second aspect of the present utility model includes the hybrid power system according to the above-mentioned first aspect embodiment of the present utility model.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] The above-mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 is a schematic diagram of a hybrid power system according to the first embodiment of the present utility model;

[0019] Figure 2 is Figure 1 a schematic diagram of the hybrid power system shown in the pure electric mode;

[0020] Figure 3 is Figure 1 a schematic diagram of the hybrid power system shown in the charging mode;

[0021] Figure 4 is Figure 1 a schematic diagram of the hybrid power system shown in the hybrid mode;

[0022] Figure 5 is a schematic diagram of the hybrid power system according to the second embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the hybrid power system according to the third embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of the hybrid power system according to the fourth embodiment of the present invention.

[0025] Reference numerals:

[0026] 100: Hybrid power system;

[0027] 10: Engine; 20: Transmission; 201: Power input shaft; 202: Planetary mechanism: 2021: Ring gear; 2022: Planet carrier; 2023: Planet gear; 2024: Sun gear; 203: First gear pair; 2031: First driving gear; 2032: First driven gear; 204: Second gear pair; 2041: Second driving gear; 2042: Second driven gear; 205: Shifting mechanism; 206: Fixed gear; 207: Power output shaft; 30: First motor; 40: Transmission mechanism; 401: Transmission shaft; 402: Third gear pair; 4021: Third driving gear; 4022: Third driven gear; 403: Fourth gear pair; 4031: Fourth driving gear; 4032: Fourth driven gear; 50: First differential; 60: Second differential; 70: Shock absorber; 80: First drive half shaft; 90: Front wheel; 110: Second drive half shaft; 120: Rear wheel; 130: Second motor. Detailed implementation manners

[0028] Next, refer to Figures 1-7 to describe the hybrid power system 100 according to the embodiment of the first aspect of the present invention.

[0029] As Figures 1-7 shown, the hybrid power system 100 according to the embodiment of the first aspect of the present invention includes: an engine 10, a transmission 20, a first motor 30, and a second motor 130.

[0030] Specifically, the input end of the transmission 20 is connected to the output shaft of the engine 10, the output end of the transmission 20 is connected to the first drive half shaft 80, the first drive half shaft 80 is connected to the front wheels 90 of the vehicle, the output shaft of the first motor 30 is connected to the transmission 20, the second motor 130 is connected to the second drive half shaft 110 through the transmission mechanism 40, and the second drive half shaft 110 is connected to the rear wheels 120 of the vehicle.

[0031] For example, in Figures 1-7 's example, the engine 10 and the first motor 30 can be respectively connected to two different input ends of the transmission 20. The middle part of the first drive half shaft 80 is connected to the output end of the transmission 20, and both ends of the first drive half shaft 80 are respectively connected to two front wheels 90 to achieve front-wheel drive of the vehicle. The second motor 130 and the transmission mechanism 40 are arranged between the first drive half shaft 80 and the second drive half shaft 110. The output shaft of the second motor 130 is connected to the input end of the transmission mechanism 40, and the output end of the transmission mechanism 40 is connected to the shaft part of the second drive half shaft 110. Both ends of the second drive half shaft 110 are respectively connected to two rear wheels 120 to achieve rear-wheel drive of the vehicle. That is to say, by connecting the two motors to different wheels respectively, the vehicle is equipped with four-wheel drive function.

[0032] Among them, as Figure 2 shown, when the front wheels 90 are in a slipping condition, that is, the power transmitted from the first motor 30 and / or the engine 10 to the front wheels 90 through the transmission 20 only causes the front wheels 90 to rotate idly and cannot drive the vehicle forward. At this time, the power transmission between the first motor 30 and / or the engine 10 and the front wheels 90 can be disconnected to reduce the drag resistance, avoid the first motor 30 from rotating idly, reduce energy consumption, and only the second motor 130 can transmit the driving force to the rear wheels 120, that is, the second motor 130 provides the power for the vehicle to travel and pushes the vehicle forward, so that the vehicle can get out of trouble even when the front wheels 90 are slipping and ensure the vehicle runs in pure electric mode.

[0033] As Figure 3 shown, when the vehicle runs in the charging mode or the engine 10 has just started, the power transmission between the second motor 130 and the rear wheels 120 can be disconnected at this time, and the engine 10 provides the driving force. A part of the power output by the engine 10 is transmitted to the front wheels 90 through the transmission 20 and the first drive half shaft 80 to achieve front-wheel drive of the vehicle and drive the vehicle to run; another part of the power output by the engine 10 can be transmitted to the first motor 30 through the transmission 20, and the first motor 30 converts mechanical energy into electrical energy for charging.

[0034] As Figure 4As shown, when the vehicle operates in the hybrid mode, the engine 10 and the second motor 130 are used to provide driving force, and the first motor 30 is used for energy recovery and charging. That is, a part of the power output by the engine 10 is transmitted to the front wheels 90 through the transmission 20 and the first drive half shaft 80 to achieve front-wheel drive of the vehicle and drive the vehicle to run. Another part of the power output by the engine 10 can be transmitted to the first motor 30 through the transmission 20, and the first motor 30 converts mechanical energy into electrical energy for charging. At the same time, the second motor 130 rotates and transmits the power to the rear wheels 120 through the transmission mechanism 40. Thus, the vehicle can operate in a four-wheel drive form in the hybrid mode, with the rear wheels 120 as the main power, improving the driving performance of the whole vehicle.

[0035] Specifically, the transmission 20 includes a power input shaft 201, a planetary gear mechanism 202, a first gear pair 203, a second gear pair 204, and a power output shaft 207. The power input shaft 201 is connected to the engine 10. The planetary gear mechanism 202 is respectively connected to the power input shaft 201 and the output shaft of the first motor 30. The power input shaft 201 and the power output shaft 207 are connected by the first gear pair 203 in a transmission manner. The power output shaft 207 and the first differential 50 are connected by the second gear pair 204 in a transmission manner.

[0036] As Figures 1-7 shown, the power input shaft 201, the power output shaft 207, and the first drive half shaft 80 are parallel to each other. Both ends of the power input shaft 201 are respectively connected to the engine 10 and the planetary gear mechanism 202. The first motor 30 is connected to the planetary gear mechanism 202. The first gear pair 203 is respectively connected to the power input shaft 201 and the power output shaft 207, and is used to transmit the power of the power input shaft 201 to the power output shaft 207. The second gear pair 204 is respectively connected to the power output shaft 207 and the first drive half shaft 80, and is used to transmit the power of the power output shaft 207 to the front wheels 90 through the first drive half shaft 80 and the first differential 50 to achieve front-wheel 90 drive. Thus, by adopting the planetary gear mechanism 202, the transmission 20 makes full use of the advantage that the planetary gear mechanism 202 can adjust the speed, enabling the speed and torque of the engine 10 to be adjustable, making the operation of the hybrid power system 100 more flexible and conducive to further reducing fuel consumption.

[0037] According to the hybrid system 100 of the embodiments of the present utility model, by connecting the first motor 30 to the transmission 20, the second motor 130 is connected to the rear wheels 120 through the transmission mechanism 40 and the second drive half shaft 110, and the planetary mechanism 202 of the transmission 20 is respectively connected to the output shafts of the engine 10 and the first motor 30. Thus, the first motor 30 can be integrated on the transmission 20, so that in the case of the front wheels 90 slipping, the second motor 130 can independently provide driving force to ensure the normal operation of the vehicle. The vehicle has four-wheel drive function, greatly improving the performance of the vehicle and the user experience. The transmission 20 makes full use of the advantage that the planetary mechanism 202 can adjust the speed, so that the speed and torque of the engine 10 can be adjusted, and the operation of the hybrid system 100 is more flexible, which is beneficial to further reducing fuel consumption.

[0038] According to some embodiments of the present utility model, the hybrid system 100 further includes a first differential 50 and a second differential 60. The input end of the first differential 50 is connected to the second gear pair 204, and the output end of the first differential 50 is connected to the first drive half shaft 80. The input end of the second differential 60 is connected to the output shaft of the second motor 130, and the output end of the second differential 60 is connected to the second drive half shaft 110. As Figures 1-7 shown, the first differential 50 is provided in the middle of the first drive half shaft 80 and is connected to the output end of the transmission 20 (i.e., the second gear pair 204) to receive power from the transmission 20 and is used to make the left front wheel 90 and the right front wheel 90 rotate at different speeds during turning to ensure that the front wheels 90 make pure rolling motion; the second differential 60 is provided in the middle of the second drive half shaft 110 and is used to make the left rear wheel 120 and the right rear wheel 120 rotate at different speeds during turning to ensure that the rear wheels 120 make pure rolling motion. With such a setting, it is ensured that the vehicle can operate normally under any working conditions.

[0039] Further, the transmission 20 further includes a shifting mechanism 205. The shifting mechanism 205 is provided on the power output shaft 207 and can be switched between a first state and a second state. As Figure 4 shown, when the shifting mechanism 205 is in the first state, the power of the power input shaft 201 is transmitted to the first differential 50 through the first gear pair 203, the power output shaft 207 and the second gear pair 204. At this time, the power of the power input shaft 201 comes from the engine 10 and / or the first motor 30. At this time, the vehicle can operate in the engine 10 driving mode, the hybrid mode or the first motor 30 driving mode.

[0040] When the shifting mechanism 205 is in the second state, the power transmission between the power input shaft 201 and the first differential 50 is disconnected. Among them, as Figure 2As shown, when neither the engine 10 nor the first motor 30 can provide driving force, the driving force for vehicle travel only comes from the second motor 130. At this time, the planetary mechanism 202 is locked, enabling the vehicle to operate in the second motor 130 driving mode (i.e., pure electric mode). Thus, by setting the shift mechanism 205, the power transmission between the engine 10 and the first motor 30 and the front wheels 90 can be disconnected, reducing the coasting resistance during pure electric driving, avoiding the idling of the first motor 30, and reducing energy consumption.

[0041] Or, as Figure 3 shown, when the shift mechanism 205 is in the second state, only the engine 10 and the first motor 30 can operate. At this time, the power of the engine 10 can be transmitted to the first motor 30 through the power input shaft 201 and the planetary mechanism 202 for charging; or, the first motor 30 rotates to drive the planetary mechanism 202 to rotate, so as to transmit the power to the engine 10 to start the engine 10.

[0042] According to some specific embodiments of the present invention, referring to Figures 1-7 , the first gear pair 203 includes a first driving gear 2031 and a first driven gear 2032 that mesh with each other. The first driving gear 2031 is connected to the planetary mechanism 202, and the first driven gear 2032 is provided on the power output shaft 207. The second gear pair 204 includes a second driving gear 2041 and a second driven gear 2042 that mesh with each other. The second driving gear 2041 is provided on the power output shaft 207, and the second driven gear 2042 is connected to the first differential 50. For example, the first driving gear 2031 can be sleeved on the planetary mechanism 202, both the first driven gear 2032 and the second driving gear 2041 are connected to the power output shaft 207, and the second driven gear 2042 is sleeved on the first differential 50. Thus, the power of the power input shaft 201 is transmitted to the first driving gear 2031 through the planetary mechanism 202, the first driving gear 2031 transmits to the first driven gear 2032, and then the first driven gear 2032 drives the power output shaft 207 to rotate. The power output shaft 207 drives the second driving gear 2041 and the second driven gear 2042 to rotate to transmit the power to the first differential 50, and the first differential 50 finally transmits the power to the front wheels 90 to drive the vehicle to travel.

[0043] Among them, when the shift mechanism 205 is in the first state, the shift mechanism 205 is connected to the second driving gear 2041 or the first driven gear 2032.

[0044] Specifically, referring to Figure 1 and Figure 4, the second driving gear 2041 is sleeved on the power output shaft 207 loosely. The second driving gear 2041 is arranged between the first driven gear 2032 and the shifting mechanism 205, and the shifting mechanism 205 is arranged on the side of the second driving gear 2041 away from the first driven gear 2032. The shifting mechanism 205 can be connected to or disconnected from the second driving gear 2041. When it is necessary to transmit power to the front wheels 90, the shifting mechanism 205 can be switched to the first state. At this time, the shifting mechanism 205 is connected to the second driving gear 2041. The power on the power input shaft 201 is transmitted to the power output shaft 207 through the planetary mechanism 202, the first driving gear 2031 and the first driven gear 2032. The power on the power output shaft 207 is transmitted to the first differential 50 through the shifting mechanism 205, the second driving gear 2041 and the second driven gear 2042. Finally, the power on the first differential 50 is transmitted to the front wheels 90 through the first drive half shaft 80 to drive the vehicle to run.

[0045] Refer to Figure 2 and Figure 3 , when the vehicle starts in pure electric mode, charging mode or with the engine 10, at this time, the power of the power input shaft 201 does not need to be transmitted to the front wheels 90 and can be switched to the second state through the shifting mechanism 205, that is, the shifting mechanism 205 is disconnected from the second driving gear 2041, ensuring that the power of the power input shaft 201 cannot be transmitted to the front wheels 90, which is beneficial for the first motor 30 to charge or the second motor 130 to provide power to drive the vehicle to run.

[0046] As Figure 5 shown, the first driven gear 2032 is sleeved on the power output shaft 207 loosely. The first driven gear 2032 is arranged between the second driving gear 2041 and the shifting mechanism 205, and the shifting mechanism 205 is located on the side of the first driven gear 2032 away from the second driving gear 2041. The shifting mechanism 205 can be connected to or disconnected from the first driven gear 2032. When it is necessary to transmit power to the front wheels 90, the shifting mechanism 205 can be switched to the first state. At this time, the shifting mechanism 205 is connected to the first driven gear 2032. The power on the power input shaft 201 is transmitted to the first driven gear 2032 through the planetary mechanism 202 and the first driving gear 2031. The power of the first driven gear 2032 is transmitted to the power output shaft 207 through the shifting mechanism 205. The power on the power output shaft 207 is transmitted to the first differential 50 through the second driving gear 2041 and the second driven gear 2042. Finally, the power on the first differential 50 is transmitted to the front wheels 90 through the first drive half shaft 80 to drive the vehicle to run.

[0047] When the vehicle starts in pure electric mode, charging mode or with the engine 10, at this time, the power of the power input shaft 201 does not need to be transmitted to the front wheels 90, and can be switched to the second state through the shifting mechanism 205, that is, the shifting mechanism 205 is disconnected from the first driven gear 2032, ensuring that the power of the power input shaft 201 cannot be transmitted to the front wheels 90, which is beneficial for the first motor 30 to charge or the second motor 130 to provide power to drive the vehicle to run.

[0048] Further, referring to Figures 1-5 , the transmission 20 further includes a housing and a fixed gear 206. The housing is provided with a power input shaft 201, a planetary mechanism 202, a first gear pair 203, a second gear pair 204 and a shifting mechanism 205. The fixed gear 206 is arranged on the power output shaft 207, and the fixed gear 206 is fixedly connected to the housing. When the shifting mechanism 205 is in the second state, the shifting mechanism 205 is connected to the fixed gear 206. In this way, the power output shaft 207 is provided with a first driven gear 2032, a second driving gear 2041, a shifting mechanism 205 and a fixed gear 206, and the fixed gear 206 is sleeved on the power output shaft 207. When it is necessary to disconnect the power transmission between the power input shaft 201 and the front wheels 90, the shifting mechanism 205 can be switched to the second state. At this time, the shifting mechanism 205 is disconnected from the first driven gear 2032 or the second driving gear 2041, and the shifting mechanism 205 is connected to the fixed gear 206. Since the fixed gear 206 is connected to the housing, at this time, the first driven gear 2032 drives the power output shaft 207 to rotate idly (as shown in Figure 3 ), or the first driven gear 2032 rotates idly to realize the parking function (as shown in Figure 5 ).

[0049] According to some specific embodiments of the present invention, the planetary mechanism 202 includes a ring gear 2021, a planetary carrier 2022, planetary gears 2023 and a sun gear 2024. The ring gear 2021 is connected to the first driving gear 2031. The planetary carrier 2022 is arranged inside the ring gear 2021. The planetary carrier 2022 is connected to the output shaft of the engine 10. The planetary gears 2023 are connected to the planetary carrier 2022. The sun gear 2024 meshes with the planetary gears 2023. The sun gear 2024 is connected to the output shaft of the first motor 30. As shown in Figure 3 , when the shifting mechanism 205 is connected to the fixed gear 206, the ring gear 2021 can be locked (that is, the ring gear 2021 is fixed), realizing idle charging without the need for a parking mechanism to lock.

[0050] As shown in Figure 4As shown, when the vehicle runs in a hybrid mode, the power of the engine 10 can be transmitted to the planet gear 2023 via the power input shaft 201 and the planet carrier 2022. A part of the power of the planet gear 2023 is transmitted to the first driving gear 2031 via the ring gear 2021, and then transmitted to the first differential 50 via the first driven gear 2032, the power output shaft 207, the shift mechanism 205, the second driving gear 2041 and the second driven gear 2042. Finally, the power is distributed to the two front wheels 90 via the first differential 50. Another part of the power of the planet gear 2023 is transmitted to the first motor 30 via the sun gear 2024 for charging, or the power of the first motor 30 is also transmitted to the planet gear 2023 via the sun gear 2024. Thus, the structural characteristics of the power split of the planetary mechanism 202 are fully utilized, and the vehicle can drive the front wheels 90 and the first motor 30 can generate electricity under the condition of power shortage of the vehicle, and the first motor 30 can generate electricity and output at high power, so that the vehicle has better driving performance.

[0051] According to some embodiments of the present invention, as Figures 1-7 shown, the transmission mechanism 40 includes a transmission shaft 401, a third gear pair 402 and a fourth gear pair 403. The output shaft of the second motor 130 is drivingly connected to the transmission shaft 401 via the third gear pair 402, and the transmission shaft 401 is drivingly connected to the second differential 60 via the fourth gear pair 403.

[0052] Wherein, the first drive half shaft 80, the transmission shaft 401 and the second drive half shaft 110 are parallel to each other, and the transmission shaft is located between the first drive half shaft 80 and the second drive half shaft 110. The third gear pair 402 is respectively connected to the output shaft of the second motor 130 and the transmission shaft 401, and the fourth gear pair 403 is respectively connected to the transmission shaft 401 and the second differential 60.

[0053] Specifically, the third gear pair 402 includes a third driving gear 4021 and a third driven gear 4022 that mesh with each other. The third driving gear 4021 is provided on the output shaft of the second motor 130, and the third driven gear 4022 is provided on the transmission shaft 401. The fourth gear pair 403 includes a fourth driving gear 4031 and a fourth driven gear 4032 that mesh with each other. The fourth driving gear 4031 is provided on the transmission shaft 401, and the fourth driven gear 4032 is connected to the second differential 60.

[0054] With such a setting, while ensuring that the power of the second motor 130 can be transmitted to the second differential 60 via the transmission mechanism 40, the third gear pair 402 and the fourth gear pair 403 can better adjust the rotational speed transmitted to the rear wheels 120 via the second motor 130 to provide driving force for the vehicle.

[0055] In some alternative embodiments, the hybrid power system 100 further includes a shock absorber 70 disposed on the power input shaft 201, and the shock absorber 70 is located between the engine 10 and the planetary gear mechanism 202. The shock absorber 70 can accelerate the attenuation of the vibration of the engine 10, reduce the vibration on the power input shaft 201, ensure that the power can be smoothly transmitted to the planetary gear mechanism 202, avoid abnormal noises, and ensure the smoothness of the vehicle during driving. Optionally, the shock absorber 70 can be a torsional shock absorber 70, but is not limited thereto.

[0056] The specific operation mode of the hybrid power system according to the embodiment of the present invention is as follows:

[0057] As Figure 2 shown, in the pure electric mode: the shift mechanism 205 is in the neutral state, and the power transmission between the engine 10 and the first motor 30 and the front wheels 90 is disconnected to reduce the drag resistance. At this time, only the second motor 130 works. The second motor 130 rotates to drive the third driving gear 4021 and the third driven gear 4022 to rotate, so as to transmit the power to the transmission shaft 401. The power on the transmission shaft 401 is transmitted to the two rear wheels 120 through the fourth driving gear 4031, the fourth driven gear 4032 and the second differential 60, realizing the rear-wheel drive function.

[0058] As Figure 3 shown, in the charging mode (idle charging) / engine 10 start: the second motor 130 does not work, and the shift mechanism 205 is connected to the fixed gear 206 to lock the ring gear 2021. At this time, the power of the engine 10 can be transmitted to the planetary gear 2023 through the power input shaft 201 and the planet carrier 2022, and the power of the planetary gear 2023 is transmitted to the first motor 30 through the sun gear 2024 for charging; or, the first motor 30 rotates to drive the sun gear 2024 to rotate, and together with the planetary gear 2023 and the planet carrier 2022, the power is transmitted to the engine 10 to start the engine 10.

[0059] As Figure 4As shown in the figure, in the hybrid mode: the shift mechanism 205 is connected to the second driving gear 2041. At this time, the power of the engine 10 is transmitted to the power input shaft 201 through the shock absorber 70. The power of the power input shaft 201 is transmitted to the planet gear 2023 through the planet carrier 2022. A part of the power of the planet gear 2023 is transmitted to the first motor 30 through the sun gear 2024 for energy conversion between mechanical energy and electrical energy; another part of the power of the planet gear 2023 is transmitted to the power output shaft 207 through the ring gear 2021, the first driving gear 2031 and the first driven gear 2032. The power of the power output shaft 207 is transmitted to the front wheels 90 through the shift mechanism 205, the second driving gear 2041, the second driven gear 2042 and the first differential 50; at the same time, the power of the second motor 130 is transmitted to the drive shaft 401 through the third driving gear 4021 and the third driven gear 4022. The power of the drive shaft 401 is transmitted to the rear wheels 120 through the fourth driving gear 4031, the fourth driven gear 4032 and the second differential 60. In this way, the vehicle is driven, and the adjustable engine 10 speed and torque characteristics of the planetary mechanism 202 can be reused for optimal control, reducing fuel consumption.

[0060] A vehicle (not shown in the figure) according to the second aspect embodiment of the present invention includes the hybrid power system 100 according to the above first aspect embodiment of the present invention.

[0061] According to the vehicle of the embodiment of the present invention, by adopting the above hybrid power system 100, the vehicle can have four-wheel drive function. Even if the front wheels 90 of the vehicle slip, the vehicle can still run normally by driving the rear wheels 120, improving the market competitiveness of the vehicle.

[0062] The other components and operations of the vehicle according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 of the present invention.

[0064] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0065] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0066] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hybrid power system, characterized in that: include: engine; A transmission, wherein an input end of the transmission is connected to an output shaft of the engine, an output end of the transmission is connected to a first drive axle, and the first drive axle is connected to a front wheel of the vehicle; a first motor, wherein an output shaft of the first motor is connected to the transmission; a second motor, the second motor being connected to a second drive axle through a transmission mechanism, the second drive axle being connected to a rear wheel of the vehicle; Wherein, the transmission includes a power input shaft, a planetary mechanism, a first gear pair, a second gear pair and a power output shaft, the power input shaft is connected to the output shaft of the engine, the planetary mechanism is respectively connected to the power input shaft and the output shaft of the first motor, the power input shaft and the power output shaft are connected through the first gear pair, and the power output shaft and the first drive half shaft are connected through the second gear pair.

2. The hybrid power system according to claim 1, characterized in that: Also includes: a first differential, wherein an input end of the first differential is connected to the second gear pair, and an output end of the first differential is connected to the first driving half shaft; A second differential, wherein an input end of the second differential is connected to an output shaft of the second motor, and an output end of the second differential is connected to the second drive half shaft.

3. The hybrid power system according to claim 2, characterized in that: The transmission further comprises a shift mechanism, the shift mechanism being arranged on the power output shaft, and the shift mechanism being switchable between a first state and a second state; When the shift mechanism is in the first state, the power of the power input shaft is transmitted to the first differential via the first gear pair, the power output shaft and the second gear pair; When the shift mechanism is in the second state, power transmission between the power input shaft and the first differential is disconnected.

4. The hybrid power system according to claim 3, characterized in that: The first gear pair comprises a first driving gear and a first driven gear meshing with each other, the first driving gear is connected to the planetary mechanism, and the first driven gear is arranged on the power output shaft; The second gear pair comprises a second driving gear and a second driven gear meshing with each other, the second driving gear is arranged on the power output shaft, and the second driven gear is connected to the first differential; Wherein, when the shift mechanism is in the first state, the shift mechanism is connected to the second driving gear or the first driven gear.

5. The hybrid power system according to claim 4, characterized in that: The transmission also includes: a housing, wherein the power input shaft, the planetary mechanism, the first gear pair, the second gear pair and the shift mechanism are arranged in the housing; A fixed wheel, wherein the fixed wheel is arranged on the power output shaft, the fixed wheel is fixedly connected to the housing, and when the shift mechanism is in the second state, the shift mechanism is connected to the fixed wheel.

6. The hybrid power system according to claim 4, characterized in that: The planetary mechanism comprises: A ring gear connected to the first driving gear; A planet carrier, the planet carrier is arranged in the ring gear, and the planet carrier is connected to the output shaft of the engine; A planetary gear connected to the planet carrier; A sun gear is meshed with the planetary gears and connected to an output shaft of the first motor.

7. The hybrid power system according to any one of claims 2 to 6, characterized in that: The transmission mechanism comprises: transmission shaft; a third gear pair, through which the output shaft of the second motor is transmission-connected to the transmission shaft; A fourth gear pair, the transmission shaft is drivingly connected to the second differential through the fourth gear pair.

8. The hybrid power system according to claim 7, characterized in that: The third gear pair comprises a third driving gear and a third driven gear meshing with each other, the third driving gear is arranged on the output shaft of the second motor, and the third driven gear is arranged on the transmission shaft; The fourth gear pair includes a fourth driving gear and a fourth driven gear meshing with each other, the fourth driving gear is arranged on the transmission shaft, and the fourth driven gear is connected to the second differential.

9. The hybrid power system according to claim 1, characterized in that: Also includes: A shock absorber is arranged on the power input shaft and is located between the engine and the planetary mechanism.

10. A vehicle, characterized in that: Comprising a hybrid power system according to any one of claims 1-9.

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