Hybrid power system and vehicle

Abstract

The present invention provides a hybrid power system and a vehicle. The hybrid power system comprises: an engine, a first motor, a planetary gear train, a first main shaft, and a second main shaft. The first main shaft and the second main shaft are coaxially spaced apart from each other; a first end of the first main shaft is transmittingly connected to an output shaft of the engine; and the second main shaft is configured to be transmittingly connected to wheels. The planetary gear train comprises: a center gear, a plurality of planetary gears, a planet carrier, a ring gear, and a brake, wherein the ring gear and the center gear are coaxially arranged; the plurality of planetary gears are located between the center gear and the ring gear, and are respectively engaged with the center gear and the ring gear; the planet carrier is coaxially connected to a second end of the first main shaft; the center gear is movably fitted over the first main shaft; the brake is used for braking the center gear; and the ring gear is coaxially connected to the second main shaft. The planetary gear train is located in a rotor of the first motor, and the inner circumferential wall of the rotor of the first motor is connected to the outer circumferential wall of the ring gear. The present invention can mitigate the problem of a large axial space occupied by the hybrid power system.

Description

Hybrid systems and vehicles

[0001] This application claims priority to Chinese patent application No. 2023236695972, filed on December 29, 2023, with utility model name “Hybrid System and Automobile”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of automobile technology, and in particular to a hybrid power system and an automobile. Background Art

[0003] Traditional vehicles mostly use fossil fuels (such as gasoline and diesel) to power their engines, and their exhaust emissions pollute the environment. Therefore, it is urgent to use pollution-free new energy (such as electricity) to replace fossil fuels to power vehicles. Therefore, new energy vehicles are the development trend.

[0004] In related technologies, hybrid powertrains typically include an engine, an electric motor, and a transmission. The transmission houses a planetary gear train, a first main shaft, and a second main shaft. The transmission components of the planetary gear train include a sun gear, planetary gears, a planetary carrier, and a ring gear. The first main shaft is in driving connection with one transmission component in the planetary gear train, while the second main shaft is in driving connection with another transmission component in the planetary gear train.

[0005] Since a large number of power sources and transmission components are provided in the hybrid system, and each power source and transmission component needs to be installed on the first main shaft or the second main shaft, a longer first main shaft or second main shaft needs to be provided, which causes the hybrid system to occupy a larger axial space, which is not conducive to achieving a lightweight design of the hybrid system.

[0006] Utility Model Content

[0007] The embodiments of the present application provide a hybrid power system and a vehicle, which can improve the problem of the hybrid power system occupying a large axial space and achieve a lightweight design of the hybrid power system. The technical solution is as follows:

[0008] In one aspect, an embodiment of the present disclosure provides a hybrid power system, which includes: an engine, a first motor, a planetary gear system, a first main shaft and a second main shaft; the first main shaft and the second main shaft are coaxially spaced apart, the first end of the first main shaft is transmission-connected to the output shaft of the engine, and the second main shaft is used to be transmission-connected to the wheel; the planetary gear system includes: a center wheel, a plurality of planetary wheels, a planetary carrier, a ring gear and a brake, the ring gear is coaxially arranged with the center wheel, the plurality of planetary wheels are located between the center wheel and the ring gear, and are respectively engaged with the center wheel and the ring gear, the planetary carrier is coaxially connected to the second end of the first main shaft, the center wheel is movably sleeved outside the first main shaft, the brake is used to brake the center wheel, and the ring gear is coaxially connected to the second main shaft; the planetary gear system is located in the rotor of the first motor, and the inner circumferential wall of the rotor of the first motor is connected to the outer circumferential wall of the ring gear.

[0009] In an implementation of the embodiment of the present disclosure, the axial length of the ring gear is less than or equal to the axial length of the rotor of the first motor.

[0010] In another implementation of the embodiment of the present disclosure, the hybrid power system also includes a housing, the first motor, the planetary gear train and the second main shaft are all located in the housing, the first main shaft is movably inserted in the housing, the first end of the first main shaft is located outside the housing, and the second end of the first main shaft is located inside the housing.

[0011] In another implementation of the embodiment of the present disclosure, the planetary gear system also includes a first hollow shaft, which is movably mounted outside the first main shaft, and one end of the first hollow shaft is coaxially connected to the center wheel; the brake includes a first steel plate and a first clutch plate, the outer peripheral wall of the first steel plate of the brake is connected to the inner wall of the housing, the first clutch plate of the brake is axially movably mounted outside the first hollow shaft, and the first clutch plate of the brake is circumferentially locked with the first hollow shaft.

[0012] In another implementation of the embodiment of the present disclosure, the hybrid power system also includes a clutch, a gear train and a third main shaft, and the third main shaft is distributed parallel to the second main shaft; the clutch is connected to the input gear of the gear train and the second main shaft, the output gear of the gear train is coaxially connected to the third main shaft, and the third main shaft is used for connecting to the wheel transmission.

[0013] In another implementation of the embodiment of the present disclosure, the hybrid power system also includes a second hollow shaft, which is movably mounted outside the second main shaft; the clutch includes a clutch hoop, a second steel plate and a second clutch plate, the second steel plate of the clutch and the second clutch plate of the clutch are both located inside the clutch hoop, the clutch hoop is coaxially connected to the second main shaft, the outer peripheral wall of the second steel plate of the clutch is connected to the inner wall of the clutch hoop, the second clutch plate of the clutch is axially movably mounted outside the second hollow shaft, and the second clutch plate of the clutch is circumferentially locked with the second hollow shaft; the input gear of the gear train is coaxially connected to one end of the second hollow shaft.

[0014] In another implementation of the embodiment of the present disclosure, the hybrid system further includes a second motor and a first transmission gear, the output shaft of the second motor is in transmission connection with the first transmission gear, and the first transmission gear is meshed with the output gear of the gear train.

[0015] In another implementation of the embodiment of the present disclosure, the hybrid system also includes a second transmission gear and a differential, the second transmission gear is fixedly mounted outside the third main shaft, the differential is transmission-connected to the second transmission gear, and the third main shaft is transmission-connected to the wheels through the differential.

[0016] In another implementation of the embodiment of the present disclosure, the hybrid power system further includes a power supply component, which includes: a battery and an inverter, and the inverter is connected to the battery and the first motor respectively.

[0017] On the other hand, an embodiment of the present disclosure provides a car, which includes a body and a hybrid power system, wherein the hybrid power system is located in the body, and the hybrid power system includes: an engine, a first motor, a planetary gear system, a first main shaft and a second main shaft; the first main shaft and the second main shaft are coaxially spaced, the first end of the first main shaft is transmission-connected to the output shaft of the engine, and the second main shaft is used to be transmission-connected to the wheel; the planetary gear system includes: a center wheel, a plurality of planetary gears, a planetary carrier, a ring gear and a brake, the ring gear is coaxially arranged with the center wheel, the plurality of planetary gears are located between the center wheel and the ring gear, and are respectively engaged with the center wheel and the ring gear, the planetary carrier is coaxially connected to the second end of the first main shaft, the center wheel is movably sleeved outside the first main shaft, the brake is used to brake the center wheel, and the ring gear is coaxially connected to the second main shaft; the planetary gear system is located in the rotor of the first motor, and the inner circumferential wall of the rotor of the first motor is connected to the outer circumferential wall of the ring gear.

[0018] In an implementation of the embodiment of the present disclosure, the axial length of the ring gear is less than or equal to the axial length of the rotor of the first motor.

[0019] In another implementation of the embodiment of the present disclosure, the hybrid power system also includes a housing, the first motor, the planetary gear train and the second main shaft are all located in the housing, the first main shaft is movably inserted in the housing, the first end of the first main shaft is located outside the housing, and the second end of the first main shaft is located inside the housing.

[0020] In another implementation of the embodiment of the present disclosure, the planetary gear system also includes a first hollow shaft, which is movably mounted outside the first main shaft, and one end of the first hollow shaft is coaxially connected to the center wheel; the brake includes a first steel plate and a first clutch plate, the outer peripheral wall of the first steel plate of the brake is connected to the inner wall of the housing, the first clutch plate of the brake is axially movably mounted outside the first hollow shaft, and the first clutch plate of the brake is circumferentially locked with the first hollow shaft.

[0021] In another implementation of the embodiment of the present disclosure, the hybrid power system also includes a clutch, a gear train and a third main shaft, and the third main shaft is distributed parallel to the second main shaft; the clutch is connected to the input gear of the gear train and the second main shaft, the output gear of the gear train is coaxially connected to the third main shaft, and the third main shaft is used for connecting to the wheel transmission.

[0022] In another implementation of the embodiment of the present disclosure, the hybrid power system also includes a second hollow shaft, which is movably mounted outside the second main shaft; the clutch includes a clutch hoop, a second steel plate and a second clutch plate, the second steel plate of the clutch and the second clutch plate of the clutch are both located inside the clutch hoop, the clutch hoop is coaxially connected to the second main shaft, the outer peripheral wall of the second steel plate of the clutch is connected to the inner wall of the clutch hoop, the second clutch plate of the clutch is axially movably mounted outside the second hollow shaft, and the second clutch plate of the clutch is circumferentially locked with the second hollow shaft; the input gear of the gear train is coaxially connected to one end of the second hollow shaft.

[0023] The beneficial effects of the technical solutions provided by the embodiments of the present disclosure include at least:

[0024] The hybrid power system provided by the disclosed embodiment includes an engine, a first electric motor, a planetary gear train, a first main shaft, and a second main shaft. The planetary gear train's planetary carrier is in transmission connection with the first main shaft, and the planetary gear train's ring gear is in transmission connection with the second main shaft. This allows power to be input from the planetary gear train's planetary carrier and then transmitted to the planetary gear train's ring gear for output via the planetary gear train. Furthermore, the planetary gear train is mounted within the rotor of the first electric motor, and the outer circumferential wall of the planetary gear train's ring gear is connected to the inner circumferential wall of the rotor of the first electric motor. This not only allows the power of the first electric motor to be transmitted from the ring gear to the planetary gear train, thereby connecting the power of the first electric motor to the hybrid power system, but also reduces the axial space required for the planetary gear train in the hybrid power system because the planetary gear train is also disposed within the rotor of the first electric motor. This significantly reduces the axial size of the hybrid power system, improves the problem of the hybrid power system occupying a large axial space, and achieves a lightweight design for the hybrid power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] FIG1 is a schematic structural diagram of a hybrid power system provided by an embodiment of the present disclosure;

[0027] FIG2 is a schematic diagram of energy transmission of a hybrid power system provided by an embodiment of the present disclosure;

[0028] FIG3 is a schematic diagram of energy transmission of a hybrid power system provided by an embodiment of the present disclosure;

[0029] FIG4 is a schematic diagram of energy transmission of a hybrid power system provided by an embodiment of the present disclosure;

[0030] FIG5 is a schematic diagram of energy transmission of a hybrid power system provided by an embodiment of the present disclosure;

[0031] FIG6 is a schematic diagram of energy transmission of a hybrid power system provided by an embodiment of the present disclosure.

[0032] The symbols in the figure are explained as follows: 10. Engine; 11. First motor; 110. Rotor; 12. Second motor; 21. First main shaft; 22. Second main shaft; 23. Third main shaft; 30. Planetary gear train; 31. Center gear; 32. Planetary gear; 33. Planet carrier; 34. Ring gear; 35. Brake; 351. First steel plate; 352. First clutch plate; 36. First hollow shaft; 37. Second hollow shaft; 401. Steel plate; 402. Clutch plate; 403. Clutch hoop; 50. Clutch; 60. Gear train; 71. First transmission gear; 72. Second transmission gear; 80. Differential; 90. Power supply component; 91. Battery; 92. Inverter. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0034] FIG1 is a schematic diagram of a hybrid power system according to an embodiment of the present disclosure. As shown in FIG1 , the hybrid power system includes an engine 10 , a first motor 11 , a planetary gear train 30 , a first main shaft 21 , and a second main shaft 22 .

[0035] As shown in FIG1 , the first main shaft 21 and the second main shaft 22 are coaxially spaced apart. The first end of the first main shaft 21 is drivingly connected to the output shaft of the engine 10 , and the second main shaft 22 is used for drivingly connecting to the wheels.

[0036] As shown in Figure 1, the planetary gear train 30 includes: a center wheel 31, multiple planetary wheels 32, a planet carrier 33, a ring gear 34 and a brake 35. The ring gear 34 is arranged coaxially with the center wheel 31. The multiple planetary wheels 32 are located between the center wheel 31 and the ring gear 34 and are all engaged with the center wheel 31 and the ring gear 34. The planet carrier 33 is coaxially connected to the second end of the first main shaft 21. The center wheel 31 is movably mounted outside the first main shaft 21. The brake 35 is used to brake the center wheel 31. The ring gear 34 is coaxially connected to the second main shaft 22.

[0037] As shown in FIG. 1 , the planetary gear train 30 is located inside the rotor 110 of the first motor 11 , and the inner circumferential wall of the rotor 110 of the first motor 11 is connected to the outer circumferential wall of the ring gear 34 .

[0038] The hybrid power system provided by the disclosed embodiment includes an engine 10, a first electric motor 11, a planetary gear train 30, a first main shaft 21, and a second main shaft 22. The planetary carrier 33 of the planetary gear train 30 is drivingly connected to the first main shaft 21, and the ring gear 34 of the planetary gear train 30 is drivingly connected to the second main shaft 22. This allows power input from the planetary carrier 33 of the planetary gear train 30 to be transmitted through the planetary gear train 30 to the ring gear 34 of the planetary gear train 30 for output. Furthermore, the planetary gear train 30 is mounted within the rotor 110 of the first electric motor 11, and the outer circumferential wall of the ring gear 34 of the planetary gear train 30 is connected to the inner circumferential wall of the rotor 110 of the first electric motor 11. This not only allows the power of the first electric motor 11 to be transmitted from the ring gear 34 to the planetary gear train 30, thereby integrating the power of the first electric motor 11 into the hybrid power system, but also reduces the axial space required for the planetary gear train 30 in the hybrid power system because the planetary gear train 30 is located within the rotor 110 of the first electric motor 11. This can significantly reduce the axial size of the hybrid system, improve the problem of the hybrid system occupying a large axial space, and achieve a lightweight design of the hybrid system.

[0039] Optionally, the axial length of the ring gear 34 is less than or equal to the axial length of the rotor 110 of the first motor 11. The ring gear 34 is a transmission component in the planetary gear train 30 that surrounds the center gear 31, the planetary gears 32, and the planet carrier 33. Therefore, the axial length of the ring gear 34 is greater than the axial length of the center gear 31, the planetary gears 32, and the planet carrier 33.

[0040] In the embodiment of the present disclosure, the axial length of the ring gear 34 is limited to be smaller than the axial length of the rotor 110 of the first motor 11 to ensure that the planetary gear train 30 does not exceed the length of the rotor 110 of the first motor 11 in the axial direction, so that the planetary gear train 30 is completely wrapped by the rotor 110 of the first motor 11, thereby minimizing the space of the hybrid system occupied by the planetary gear train 30.

[0041] Optionally, as shown in Figure 1, the hybrid system also includes a shell, the first motor 11, the planetary gear train 30 and the second main shaft 22 are all located in the shell, the first main shaft 21 is movably inserted into the shell, the first end of the first main shaft 21 is located outside the shell, and the second end of the first main shaft 21 is located inside the shell.

[0042] In the above implementation, the planetary gear train 30 is arranged in the rotor 110 of the first motor 11, which is equivalent to the first motor 11 and the planetary gear train 30 forming an integral structure. In this way, when installing the hybrid system, the first motor 11 and the planetary gear train 30 can be installed in the housing together, and there is no need to set up a separate installation structure for the first motor 11 in the vehicle body space, which is conducive to improving the assembly efficiency of the hybrid system.

[0043] Optionally, as shown in FIG. 1 , the planetary gear train 30 further includes a first hollow shaft 36 , which is movably sleeved on the first main shaft 21 , and one end of the first hollow shaft 36 is coaxially connected to the center wheel 31 .

[0044] As shown in Figure 1, the brake 35 includes a first steel plate 351 and a first clutch plate 352. The outer peripheral wall of the first steel plate 351 of the brake 35 is connected to the inner wall of the shell. The first clutch plate 352 of the brake 35 is axially movably sleeved outside the first hollow shaft 36. The first clutch plate 352 of the brake 35 is circumferentially locked with the first hollow shaft 36.

[0045] Illustratively, an axially extending slot is provided on the inner wall of the shell, and a protrusion is provided on the outer peripheral wall of the first steel plate 351 of the brake 35. The protrusion can slide axially in the slot so that the first steel plate 351 is circumferentially locked after being installed on the shell.

[0046] For example, an axially extending groove is provided on the outer wall of the first hollow shaft 36, and a protrusion is provided on the wall of the inner hole of the first clutch plate 352 of the brake 35. The protrusion can slide axially along the first hollow shaft 36 in the groove, so that the first clutch plate 352 can be circumferentially locked with the first hollow shaft 36.

[0047] When the first brake 35 needs to be controlled to brake, the driving device controls the first steel plate 351 and the first clutch plate 352 to fit together, so that the first hollow shaft 36 and the housing are fixedly connected, thereby braking the center wheel 31 of the planetary gear train 30.

[0048] Optionally, as shown in FIG. 1 , the hybrid system further includes a clutch 50 , a gear train 60 and a third main shaft 23 , and the third main shaft 23 is distributed in parallel with the second main shaft 22 .

[0049] As shown in FIG1 , the clutch 50 is connected to the input gear of the gear train 60 and the second main shaft 22 . The output gear of the gear train 60 is coaxially connected to the third main shaft 23 . The third main shaft 23 is used for transmission connection with the wheels.

[0050] By setting up the clutch 50, the power transmission between the planetary gear train 30 and the wheels can be interrupted. In this way, when it is only necessary to control the engine 10 to output power to the first motor 11 to drive the first motor 11 to generate electricity, the clutch 50 can be controlled to disengage, so that the power of the engine 10 is completely transmitted to the first motor 11, and the first motor 11 is driven to generate electricity, so as to avoid the power of the engine 10 being transmitted to the wheels and prevent power loss.

[0051] Optionally, as shown in FIG. 1 , the hybrid power system further includes a second hollow shaft 37 , which is movably sleeved outside the second main shaft 22 .

[0052] As shown in Figure 1, the clutch 50 includes a clutch hoop 403, a second steel plate 401 and a second clutch plate 402. The second steel plate 401 and the second clutch plate 402 are both located in the clutch hoop 403. The clutch hoop 403 is coaxially connected to the second main shaft 22. The outer peripheral wall of the second steel plate 401 of the clutch 50 is connected to the inner wall of the clutch hoop 403. The second clutch plate 402 of the clutch 50 is axially movably sleeved outside the second hollow shaft 37. The second clutch plate 402 of the clutch 50 is circumferentially locked with the second hollow shaft 37.

[0053] As shown in FIG1 , the input gear of the gear train 60 is coaxially connected to one end of the second hollow shaft 37 , and the output gear of the gear train 60 is coaxially connected to one end of the third main shaft 23 . The third main shaft 23 is used for transmission connection with the wheels.

[0054] For example, an axially extending groove is provided on the inner wall of the clutch hoop 403, and a protrusion is provided on the outer peripheral wall of the second steel plate 401 of the clutch 50. The protrusion can slide axially along the clutch hoop 403 in the groove, so that the second steel plate 401 is circumferentially locked after being installed on the clutch hoop 403.

[0055] For example, an axially extending groove is provided on the outer wall of the second hollow shaft 37, and a protrusion is provided on the wall of the inner hole of the second clutch plate 402 of the clutch 50. The protrusion can slide axially along the second hollow shaft 37 in the groove, so that the second clutch plate 402 can be circumferentially locked with the second hollow shaft 37.

[0056] When the clutch 50 needs to be controlled to engage, the driving device controls the second steel plate 401 and the second clutch plate 402 to fit together, so that the second hollow shaft 37 and the clutch hoop 403 are in transmission connection. In this way, the power transmitted from the planetary gear train 30 to the clutch 50 can be transmitted to the second hollow shaft 37 through the clutch 50, and then transmitted to the third main shaft 23 through the second hollow shaft 37 and the gear train 60, and finally transmitted to the wheels through the third main shaft 23 to drive the wheels to rotate.

[0057] In the embodiment of the present disclosure, the gear train 60 includes at least an input gear and an output gear, and the input gear and the output gear are transmission-connected so that power can be transmitted to the output gear through the input gear.

[0058] Optionally, in the gear train 60 , the input gear and the output gear may be directly meshed; or, at least one connecting gear may be provided between the input gear and the output gear.

[0059] It should be noted that the specific number of gears provided in the gear train 60 can be determined according to actual needs.

[0060] Optionally, as shown in FIG. 1 , the hybrid system further includes a second motor 12 and a first transmission gear 71 , wherein the output shaft of the second motor 12 is in transmission connection with the first transmission gear 71 , and the first transmission gear 71 is meshed with the output gear of the gear train 60 .

[0061] The second motor 12 is used as a driving motor to output power to drive the vehicle.

[0062] In the above implementation, a second motor 12 is provided to enhance the power performance of the hybrid system. At the same time, the second motor 12 is connected to the third main shaft 23 through a gear system 60 to transmit power to the wheels. This avoids the need to provide other transmission mechanisms separately for the second motor 12, which can effectively reduce the cost of the hybrid system.

[0063] Optionally, as shown in FIG1 , the hybrid system further includes a second transmission gear 72 and a differential 80 . The second transmission gear 72 is fixedly mounted outside the third main shaft 23 . The differential 80 is in transmission connection with the second transmission gear 72 . The third main shaft 23 is in transmission connection with the wheels through the differential 80 .

[0064] In the disclosed embodiment, the input gear of the differential 80 is engaged with the second transmission gear 72 , thereby receiving power transmitted from the third main shaft 23 to achieve the purpose of driving the wheels to rotate.

[0065] The differential 80 enables the wheels connected to the output shaft of the differential 80 to rotate at different speeds. When a car turns, the turning radius of the inner and outer wheels differs. The turning radius of the outer wheels is larger than that of the inner wheels. This requires that the outer wheels rotate at a higher speed than the inner wheels during the turn. The differential 80 enables the two wheels to roll at different speeds, thereby achieving a difference in wheel speed.

[0066] Optionally, as shown in FIG1 , the hybrid power system further includes a power supply component 90 , which includes a battery 91 and an inverter 92 , and the inverter 92 is connected to the battery 91 and the first motor 11 , respectively.

[0067] Exemplarily, the power supply assembly 90 includes two inverters 92 , the two inverters 92 are respectively connected to the battery 91 , the first motor 11 is connected to one of the two inverters 92 , and the second motor 12 is connected to the other of the two inverters 92 .

[0068] Two inverters 92 are provided, one for connecting the battery 91 and the first motor 11, and the other for connecting the battery 91 and the second motor 12. The battery 91 is a rechargeable battery 91, and the inverter 92 is provided on the output circuit of the battery 91 to convert the DC power output by the battery 91 into three-phase AC power to drive the first motor 11 or the second motor 12.

[0069] Taking the hybrid power system shown in Figure 1 as an example, the various power modes of the hybrid power system are explained:

[0070] When the hybrid system is in pure electric mode, as shown in Figure 2, the engine 10 and first motor 11 are inoperative, the clutch 50 is disengaged, and the vehicle is driven by the second motor 12. The power supply assembly 90 discharges the DC power, which is converted by the inverter 92 into three-phase AC power to drive the output shaft of the second motor 12. The second motor 12 then converts the electrical energy into mechanical energy, which is then transmitted to the third main shaft 23 via the second transmission gear 72 and the differential 80 to the wheels, achieving the second motor 12-driven vehicle driving mode.

[0071] In pure electric mode, the same principle can be used to achieve reverse operation, which will not be described in detail in the embodiments of this disclosure.

[0072] When the hybrid system is in series hybrid drive mode, as shown in Figure 3, the engine 10, first motor 11, and second motor 12 work in coordination to jointly drive the vehicle. In this mode, clutch 50 is disengaged, and the engine 10 operates in its high-efficiency range, driving the first motor 11 to generate electricity. This generated energy is then supplied to the second motor 12 to drive the vehicle. Excess energy is stored in the power supply assembly 90. When the generated energy is insufficient, the power supply assembly 90 supplements it. The first motor 11 and the power supply assembly 90 jointly meet the power requirements of the second motor 12.

[0073] When the hybrid system is in parallel hybrid drive mode, as shown in Figure 4, the engine 10, first motor 11, and second motor 12 work together to drive the vehicle, delivering a high power output and improving overall vehicle dynamics. In this mode, the clutch 50 is engaged, transmitting the power of the engine 10 to the planetary gear train 30. A portion of the power of the engine 10 is then transferred to the first motor 11, driving the first motor 11 to generate electricity. The remaining power of the engine 10 is then transferred to the third main shaft 23 via the second main shaft 22, the clutch 50, and the gear train 60. The power of the third main shaft 23 is then coupled to the power of the second motor 12. Ultimately, the engine 10 and the second motor 12 jointly drive the wheels.

[0074] When the hybrid system is in engine 10 direct drive mode, as shown in FIG5 , clutch 50 is engaged and second motor 12 is deactivated. The power of engine 10 is transmitted to planetary gear train 30 , with a portion of the power being transferred to first motor 11 to generate electricity. The remaining power from engine 10 is transferred to third mainshaft 23 via second mainshaft 22 , clutch 50 , and gear train 60 , with engine 10 alone driving the wheels.

[0075] When the hybrid system is in energy recovery mode, as shown in Figure 6, the vehicle is in a coasting or braking condition, and the hybrid system provides a reverse torque to the vehicle, recovering part of the vehicle's kinetic energy through the negative torque provided by the second motor 12 for braking energy, and storing it in the power supply component 90 for standby use.

[0076] An embodiment of the present disclosure provides a car including a body and a hybrid power system, wherein the hybrid power system is located inside the body.

[0077] As shown in FIG. 1 , the hybrid power system includes an engine 10 , a first motor 11 , a planetary gear train 30 , a first main shaft 21 and a second main shaft 22 .

[0078] As shown in FIG1 , the first main shaft 21 and the second main shaft 22 are coaxially spaced apart. The first end of the first main shaft 21 is drivingly connected to the output shaft of the engine 10 , and the second main shaft 22 is used for drivingly connecting to the wheels.

[0079] As shown in Figure 1, the planetary gear train 30 includes: a center wheel 31, multiple planetary wheels 32, a planet carrier 33, a ring gear 34 and a brake 35. The ring gear 34 is arranged coaxially with the center wheel 31. The multiple planetary wheels 32 are located between the center wheel 31 and the ring gear 34 and are all engaged with the center wheel 31 and the ring gear 34. The planet carrier 33 is coaxially connected to the second end of the first main shaft 21. The center wheel 31 is movably mounted outside the first main shaft 21. The brake 35 is used to brake the center wheel 31. The ring gear 34 is coaxially connected to the second main shaft 22.

[0080] As shown in FIG. 1 , the planetary gear train 30 is located inside the rotor 110 of the first motor 11 , and the inner circumferential wall of the rotor 110 of the first motor 11 is connected to the outer circumferential wall of the ring gear 34 .

[0081] The hybrid power system provided by the disclosed embodiment includes an engine 10, a first electric motor 11, a planetary gear train 30, a first main shaft 21, and a second main shaft 22. The planetary carrier 33 of the planetary gear train 30 is drivingly connected to the first main shaft 21, and the ring gear 34 of the planetary gear train 30 is drivingly connected to the second main shaft 22. This allows power input from the planetary carrier 33 of the planetary gear train 30 to be transmitted through the planetary gear train 30 to the ring gear 34 of the planetary gear train 30 for output. Furthermore, the planetary gear train 30 is mounted within the rotor 110 of the first electric motor 11, and the outer circumferential wall of the ring gear 34 of the planetary gear train 30 is connected to the inner circumferential wall of the rotor 110 of the first electric motor 11. This not only allows the power of the first electric motor 11 to be transmitted from the ring gear 34 to the planetary gear train 30, thereby integrating the power of the first electric motor 11 into the hybrid power system, but also reduces the axial space required for the planetary gear train 30 in the hybrid power system because the planetary gear train 30 is located within the rotor 110 of the first electric motor 11. This can significantly reduce the axial size of the hybrid system, improve the problem of the hybrid system occupying a large axial space, and achieve a lightweight design of the hybrid system.

[0082] Optionally, the axial length of the ring gear 34 is less than or equal to the axial length of the rotor 110 of the first motor 11. The ring gear 34 is a transmission component in the planetary gear train 30 that surrounds the center gear 31, the planetary gears 32, and the planet carrier 33. Therefore, the axial length of the ring gear 34 is greater than the axial length of the center gear 31, the planetary gears 32, and the planet carrier 33.

[0083] In the embodiment of the present disclosure, the axial length of the ring gear 34 is limited to be smaller than the axial length of the rotor 110 of the first motor 11 to ensure that the planetary gear train 30 does not exceed the length of the rotor 110 of the first motor 11 in the axial direction, so that the planetary gear train 30 is completely wrapped by the rotor 110 of the first motor 11, thereby minimizing the space of the hybrid system occupied by the planetary gear train 30.

[0084] Optionally, as shown in Figure 1, the hybrid system also includes a shell, the first motor 11, the planetary gear train 30 and the second main shaft 22 are all located in the shell, the first main shaft 21 is movably inserted into the shell, the first end of the first main shaft 21 is located outside the shell, and the second end of the first main shaft 21 is located inside the shell.

[0085] In the above implementation, the planetary gear train 30 is arranged in the rotor 110 of the first motor 11, which is equivalent to the first motor 11 and the planetary gear train 30 forming an integral structure. In this way, when installing the hybrid system, the first motor 11 and the planetary gear train 30 can be installed in the housing together, and there is no need to set up a separate installation structure for the first motor 11 in the vehicle body space, which is conducive to improving the assembly efficiency of the hybrid system.

[0086] Optionally, as shown in FIG. 1 , the planetary gear train 30 further includes a first hollow shaft 36 , which is movably sleeved on the first main shaft 21 , and one end of the first hollow shaft 36 is coaxially connected to the center wheel 31 .

[0087] As shown in Figure 1, the brake 35 includes a first steel plate 351 and a first clutch plate 352. The outer peripheral wall of the first steel plate 351 of the brake 35 is connected to the inner wall of the shell. The first clutch plate 352 of the brake 35 is axially movably sleeved outside the first hollow shaft 36. The first clutch plate 352 of the brake 35 is circumferentially locked with the first hollow shaft 36.

[0088] Illustratively, an axially extending slot is provided on the inner wall of the shell, and a protrusion is provided on the outer peripheral wall of the first steel plate 351 of the brake 35. The protrusion can slide axially in the slot so that the first steel plate 351 is circumferentially locked after being installed on the shell.

[0089] For example, an axially extending groove is provided on the outer wall of the first hollow shaft 36, and a protrusion is provided on the wall of the inner hole of the first clutch plate 352 of the brake 35. The protrusion can slide axially along the first hollow shaft 36 in the groove, so that the first clutch plate 352 can be circumferentially locked with the first hollow shaft 36.

[0090] When the first brake 35 needs to be controlled to brake, the driving device controls the first steel plate 351 and the first clutch plate 352 to fit together, so that the first hollow shaft 36 and the housing are fixedly connected, thereby braking the center wheel 31 of the planetary gear train 30.

[0091] Optionally, as shown in FIG. 1 , the hybrid system further includes a clutch 50 , a gear train 60 and a third main shaft 23 , and the third main shaft 23 is distributed in parallel with the second main shaft 22 .

[0092] As shown in FIG1 , the clutch 50 is connected to the input gear of the gear train 60 and the second main shaft 22 . The output gear of the gear train 60 is coaxially connected to the third main shaft 23 . The third main shaft 23 is used for transmission connection with the wheels.

[0093] By setting up the clutch 50, the power transmission between the planetary gear train 30 and the wheels can be interrupted. In this way, when it is only necessary to control the engine 10 to output power to the first motor 11 to drive the first motor 11 to generate electricity, the clutch 50 can be controlled to disengage, so that the power of the engine 10 is completely transmitted to the first motor 11, and the first motor 11 is driven to generate electricity, so as to avoid the power of the engine 10 being transmitted to the wheels and prevent power loss.

[0094] Optionally, as shown in FIG. 1 , the hybrid power system further includes a second hollow shaft 37 , which is movably sleeved outside the second main shaft 22 .

[0095] As shown in Figure 1, the clutch 50 includes a clutch hoop 403, a second steel plate 401 and a second clutch plate 402. The second steel plate 401 and the second clutch plate 402 are both located in the clutch hoop 403. The clutch hoop 403 is coaxially connected to the second main shaft 22. The outer peripheral wall of the second steel plate 401 of the clutch 50 is connected to the inner wall of the clutch hoop 403. The second clutch plate 402 of the clutch 50 is axially movably sleeved outside the second hollow shaft 37. The second clutch plate 402 of the clutch 50 is circumferentially locked with the second hollow shaft 37.

[0096] As shown in FIG1 , the input gear of the gear train 60 is coaxially connected to one end of the second hollow shaft 37 , and the output gear of the gear train 60 is coaxially connected to one end of the third main shaft 23 . The third main shaft 23 is used for transmission connection with the wheels.

[0097] For example, an axially extending groove is provided on the inner wall of the clutch hoop 403, and a protrusion is provided on the outer peripheral wall of the second steel plate 401 of the clutch 50. The protrusion can slide axially along the clutch hoop 403 in the groove, so that the second steel plate 401 is circumferentially locked after being installed on the clutch hoop 403.

[0098] For example, an axially extending groove is provided on the outer wall of the second hollow shaft 37, and a protrusion is provided on the wall of the inner hole of the second clutch plate 402 of the clutch 50. The protrusion can slide axially along the second hollow shaft 37 in the groove, so that the second clutch plate 402 can be circumferentially locked with the second hollow shaft 37.

[0099] When the clutch 50 needs to be controlled to engage, the driving device controls the second steel plate 401 and the second clutch plate 402 to fit together, so that the second hollow shaft 37 and the clutch hoop 403 are in transmission connection. In this way, the power transmitted from the planetary gear train 30 to the clutch 50 can be transmitted to the second hollow shaft 37 through the clutch 50, and then transmitted to the third main shaft 23 through the second hollow shaft 37 and the gear train 60, and finally transmitted to the wheels through the third main shaft 23 to drive the wheels to rotate.

[0100] In the embodiment of the present disclosure, the gear train 60 includes at least an input gear and an output gear, and the input gear and the output gear are transmission-connected so that power can be transmitted to the output gear through the input gear.

[0101] Optionally, in the gear train 60 , the input gear and the output gear may be directly meshed; or, at least one connecting gear may be provided between the input gear and the output gear.

[0102] It should be noted that the specific number of gears provided in the gear train 60 can be determined according to actual needs.

[0103] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0104] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A hybrid power system, characterized in that, The hybrid power system includes: an engine (10), a first motor (11), a planetary gear train (30), a first main shaft (21) and a second main shaft (22); The first main shaft (21) and the second main shaft (22) are coaxially and spaced apart. The first end of the first main shaft (21) is drivingly connected to the output shaft of the engine (10), and the second main shaft (22) is used for drivingly connecting with a vehicle wheel; The planetary gear train (30) includes: a sun gear (31), a plurality of planet gears (32), a planet carrier (33), a ring gear (34) and a brake (35). The ring gear (34) is coaxially arranged with the sun gear (31). The plurality of planet gears (32) are located between the sun gear (31) and the ring gear (34) and are respectively meshed with the sun gear (31) and the ring gear (34). The planet carrier (33) is coaxially connected to the second end of the first main shaft (21). The sun gear (31) is movably sleeved outside the first main shaft (21). The brake (35) is used for braking the sun gear (31). The ring gear (34) is coaxially connected to the second main shaft (22); The planetary gear train (30) is located inside the rotor (110) of the first motor (11), and the inner peripheral wall of the rotor (110) of the first motor (11) is connected to the outer peripheral wall of the ring gear (34).

2. The hybrid system according to claim 1, wherein The axial length of the ring gear (34) is less than or equal to the axial length of the rotor (110) of the first motor (11).

3. The hybrid power system according to claim 1, characterized in that, The hybrid power system further includes a housing. The first motor (11), the planetary gear train (30) and the second main shaft (22) are all located inside the housing. The first main shaft (21) is movably inserted into the housing. The first end of the first main shaft (21) is located outside the housing, and the second end of the first main shaft (21) is located inside the housing.

4. The hybrid power system according to claim 3, wherein The planetary gear train (30) further includes a first hollow shaft (36). The first hollow shaft (36) is movably sleeved outside the first main shaft (21), and one end of the first hollow shaft (36) is coaxially connected to the sun gear (31); The brake (35) includes a first steel sheet (351) and a first clutch sheet (352). The outer peripheral wall of the first steel sheet (351) of the brake (35) is connected to the inner wall of the housing. The first clutch sheet (352) of the brake (35) is axially movably sleeved outside the first hollow shaft (36), and the first clutch sheet (352) of the brake (35) is circumferentially locked with the first hollow shaft (36).

5. The hybrid system according to any one of claims 1 to 4, characterized in that, The hybrid power system further includes a clutch (50), a gear train (60) and a third main shaft (23). The third main shaft (23) is parallel to the second main shaft (22); The clutch (50) is connected to the input gear of the gear train (60) and the second main shaft (22). The output gear of the gear train (60) is coaxially connected to the third main shaft (23), and the third main shaft (23) is used for drivingly connecting with a vehicle wheel.

6. The hybrid system according to claim 5, characterized in that, The hybrid power system further includes a second hollow shaft (37), and the second hollow shaft (37) is movably sleeved outside the second main shaft (22); The clutch (50) includes a clutch hoop (403), a second steel sheet (401) and a second clutch disc (402). The second steel sheet (401) and the second clutch disc (402) of the clutch (50) are both located inside the clutch hoop (403). The clutch hoop (403) is coaxially connected to the second main shaft (22). The outer peripheral wall of the second steel sheet (401) of the clutch (50) is connected to the inner wall of the clutch hoop (403). The second clutch disc (402) of the clutch (50) is axially movably sleeved outside the second hollow shaft (37), and the second clutch disc (402) of the clutch (50) is circumferentially locked to the second hollow shaft (37); The input gear of the gear train (60) is coaxially connected to one end of the second hollow shaft (37).

7. The hybrid system according to claim 5, wherein The hybrid power system further includes a second motor (12) and a first transmission gear (71). The output shaft of the second motor (12) is drivingly connected to the first transmission gear (71), and the first transmission gear (71) meshes with the output gear of the gear train (60).

8. The hybrid system according to claim 5, wherein The hybrid power system further includes a second transmission gear (72) and a differential (80). The second transmission gear (72) is fixedly sleeved outside the third main shaft (23), the differential (80) is drivingly connected to the second transmission gear (72), and the third main shaft (23) is drivingly connected to the wheels through the differential (80).

9. The hybrid power system according to any one of claims 1 to 4 and claims 6 to 8, characterized in that, The hybrid power system further includes a power supply assembly (90), and the power supply assembly (90) includes: a battery (91) and an inverter (92), and the inverter (92) is respectively connected to the battery (91) and the first motor (11).

10. A vehicle, characterized in that, The vehicle includes a vehicle body and a hybrid power system. The hybrid power system is located inside the vehicle body, and the hybrid power system includes: an engine (10), a first motor (11), a planetary gear train (30), a first main shaft (21) and a second main shaft (22); The first main shaft (21) and the second main shaft (22) are coaxially and spaced apart. The first end of the first main shaft (21) is drivingly connected to the output shaft of the engine (10), and the second main shaft (22) is used for drivingly connecting to the wheels; The planetary gear train (30) includes: a sun gear (31), a plurality of planet gears (32), a planet carrier (33), a ring gear (34), and a brake (35). The ring gear (34) is coaxially arranged with the sun gear (31). The plurality of planet gears (32) are located between the sun gear (31) and the ring gear (34) and are respectively meshed with the sun gear (31) and the ring gear (34). The planet carrier (33) is coaxially connected to the second end of the first main shaft (21). The sun gear (31) is movably sleeved outside the first main shaft (21). The brake (35) is used to brake the sun gear (31). The ring gear (34) is coaxially connected to the second main shaft (22). The planetary gear train (30) is located inside the rotor (110) of the first motor (11), and the inner peripheral wall of the rotor (110) of the first motor (11) is connected to the outer peripheral wall of the ring gear (34).

11. The motor vehicle according to claim 10, characterized in that, The axial length of the ring gear (34) is less than or equal to the axial length of the rotor (110) of the first motor (11).

12. The vehicle according to claim 10, characterized in that, The hybrid power system further includes a housing. The first motor (11), the planetary gear train (30), and the second main shaft (22) are all located inside the housing. The first main shaft (21) is movably inserted into the housing. The first end of the first main shaft (21) is located outside the housing, and the second end of the first main shaft (21) is located inside the housing.

13. The automobile according to claim 12, characterized in that, The planetary gear train (30) further includes a first hollow shaft (36). The first hollow shaft (36) is movably sleeved outside the first main shaft (21), and one end of the first hollow shaft (36) is coaxially connected to the sun gear (31). The brake (35) includes a first steel sheet (351) and a first clutch plate (352). The outer peripheral wall of the first steel sheet (351) of the brake (35) is connected to the inner wall of the housing. The first clutch plate (352) of the brake (35) is axially movably sleeved outside the first hollow shaft (36), and the first clutch plate (352) of the brake (35) is circumferentially locked with the first hollow shaft (36).

14. The motor vehicle according to any one of claims 10 to 13, characterized in that, The hybrid power system further includes a clutch (50), a gear train (60), and a third main shaft (23). The third main shaft (23) is parallel to the second main shaft (22). The clutch (50) is connected to the input gear of the gear train (60) and the second main shaft (22). The output gear of the gear train (60) is coaxially connected to the third main shaft (23). The third main shaft (23) is used for driving connection with a wheel.

15. The motor vehicle according to claim 14, characterized in that, The hybrid power system further includes a second hollow shaft (37). The second hollow shaft (37) is movably sleeved outside the second main shaft (22). The clutch (50) includes a clutch hoop (403), a second steel sheet (401), and a second clutch plate (402). The second steel sheet (401) and the second clutch plate (402) of the clutch (50) are both located within the clutch hoop (403). The clutch hoop (403) is coaxially connected to the second main shaft (22). The outer peripheral wall of the second steel sheet (401) of the clutch (50) is connected to the inner wall of the clutch hoop (403). The second clutch plate (402) of the clutch (50) is axially movably sleeved outside the second hollow shaft (37), and the second clutch plate (402) of the clutch (50) is circumferentially locked with the second hollow shaft (37). The input gear of the gear train (60) is coaxially connected to one end of the second hollow shaft (37).

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